Daikin Service Manual 8

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Preface Thank you very much for usual patronage to Daikin products. We have completed and pleased to present the Oil Cooling Unit (Model 8) Service Manual. We at Daikin provide an extensive lineup of models to respond to high-accuracy temperature control and needs for energy saving with the Oil Cooling Unit and appreciate your further loyal patronage. This Service Manual includes information on troubleshooting and a variety of services. Please make use of the Service Manual for your servicing of the Oil Cooling Unit.

Name of information Oil Cooling Unit (Model 8) Service Manual

Models listed

• AKZ148 to 908 • AKZJ188 to 908

Date of issue

June 2005

June 2005 After Sales Service Division

1

Standard Specifications.................... 8

1. Principle of Oil Cooling Unit...................................8 2. List of Basic Performance/Specifications.............10 3. Operating Limits ..................................................14

Wiring Diagrams .............................. 15

1. Troubleshooting According to Symptoms.............67 2. Equipment Data checking Procedure ..................68 3. Troubleshooting According to Malfunction Codes .............................................................................69 3-1. Control Panel Operation Procedure ..........69 3-2. List of Malfunction Codes..........................70 3-3. Troubleshooting Flow Chart.......................71

8

Piping Diagrams .............................. 28

5

Control Panel ................................... 49

Functions.......................................... 64

1. Operation Flow Chart ..........................................64 2. Functions .............................................................65 3. List of Malfunctions/Warnings..............................66

9

Replacement Procedure................ 112

1. Procedure for Replacing Main PC Board...........112 2. Procedure for Replacing EV Valve Main Unit ....113

10

Miscellaneous Reference Data ..... 114

1. Thermistor Temperature/Resistance Characteristics ...................................................114 2. Refrigerant (R410A) Characteristics..................114 3. Procedure for Mounting Optional Parts .............115 3-1. Machine Body Synchronization Thermistor /Optional Oil Temperature Thermistor ........115 3-2. Communication PC Board (Option).........116

Functions

6

1. AKZ148 to 908.....................................................96 2. AKZJ188 to 908.................................................104

Control Panel

1. Name and Function of Each Part ........................49 2. Operation Procedure by Mode.............................51 2-1. Normal Mode.............................................51 2-2. Operation Setting Mode ............................52 2-3. Monitor Mode ............................................54 2-4. Timer Setting Mode ...................................54 2-5. Operation Lock Mode ................................54 2-6. Parameter Setting Mode ...........................55 2-7. Auto Tuning Mode......................................62

Removing Procedure....................... 96

Piping Diagrams

4

Troubleshooting............................... 67

Wiring Diagrams

3

7

Standard Specifications

2

List of Models..................................... 6

List of Models

OIL COOLING UNIT (MODEL 8) SERVICE MANUAL

Troubleshooting Removing Procedure Replacement Procedure Miscellaneous Reference Data

The specifications and others of this Service Manual are subject to change without notice for product improvements.

1

SAFETY PRECAUTIONS

Be sure to observe the precautions shown below.

The following section describes precautions to prevent personal injury or damage. Hazardous situations, which can occur due to mishandling of the equipment, are classified by the safety alert symbols shown below.

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1 List of Models Type Standard Type

Standard type

Equipped with circuit breaker

CE Safety Standard compatible

Recirculation type Different Voltages compatible (with built-in transformer)

Equipped with heater

Equipped with oil tank

6

Model Name

Individual Specification

Page Listed Standard Specification Wiring Diagram Piping Diagram

AKZ148

10

15

28

AKZ328

10

15

28

AKZ438

10

15

28

AKZ568

11

18

28

AKZ908

11

18

28

AKZ148-B

10

15

28

AKZ328-B

10

15

28

AKZ438-B

10

15

28

AKZ568-B

11

18

28

AKZ908-B

11

18

28

AKZ148-C

10

15

28

AKZ328-C

10

15

28

AKZ438-C

10

15

28

AKZ568-C

11

18

28

AKZ908-C

11

18

28

AKZ148-E1

10

16

28

AKZ148-E2

10

16

28

AKZ148-E3

10

16

28

AKZ328-E1

10

16

28

AKZ328-E2

10

16

28

AKZ328-E3

10

16

28

AKZ438-E1

10

16

28

AKZ438-E2

10

16

28

AKZ438-E3

10

16

28

AKZ568-E1

11

19

28

AKZ568-E2

11

19

28

AKZ568-E3

11

19

28

AKZ908-E1

11

19

30

AKZ908-E2

11

19

30

AKZ908-E3

11

19

30

AKZ148-H

10

17

38

AKZ328-H

10

17

38

AKZ438-H

10

17

38

AKZ568-H

11

20

40

AKZ908-H

11

20

42

AKZ148-T (1)

10

15

32

AKZ328-T (1)

10

15

32

AKZ438-T (1)

10

15

32

AKZ568-T

11

18

34

AKZ908-T

11

18

36

List of Models

Standard type

Equipped with circuit breaker

CE Safety Standard compatible

Dipping Open type

Different Voltages compatible (equipped with transformer)

Equipped with heater

Page Listed

Model Name

Individual Specification

Standard Specification Wiring Diagram Piping Diagram

AKZJ188

12

21

46

AKZJ358

12

21

46

AKZJ458

12

21

46

AKZJ568

13

24

46

AKZJ908

13

24

46

AKZJ188-B

12

21

46

AKZJ358-B

12

21

46

AKZJ458-B

12

21

46

AKZJ568-B

13

24

46

AKZJ908-B

13

24

46

AKZJ188-C

12

21

46

AKZJ358-C

12

21

46

AKZJ458-C

12

21

46

AKZJ568-C

13

24

46

AKZJ908-C

13

24

46

AKZJ188-E1

12

22

46

AKZJ188-E2

12

22

46

AKZJ188-E3

12

22

46

AKZJ358-E1

12

22

46

AKZJ358-E2

12

22

46

AKZJ358-E3

12

22

46

AKZJ458-E1

12

22

46

AKZJ458-E2

12

22

46

AKZJ458-E3

12

22

46

AKZJ568-E1

13

25

46

AKZJ568-E2

13

25

46

AKZJ568-E3

13

25

46

AKZJ908-E1

13

25

46

AKZJ908-E2

13

25

46

AKZJ908-E3

13

25

46

AKZJ188-H

12

23

46

AKZJ358-H

12

23

46

AKZJ458-H

12

23

46

AKZJ568-H

13

26

46

AKZJ908-H

13

26

46

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7

List of Models

Type Standard Type

2 Standard Specifications 1 Principle of Oil Cooling Unit ��

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��Through the compressor, the refrigerant gas turns to be high-temperature and high-pressure compressed gas to facilitate cooling and liquefaction with the condenser.

��The condenser cools and condenses the high-temperature and high-pressure gas produced through the compressor with air to convert the gas into high-temperature and high-pressure liquid.

��The pressure reducing mechanism presses and decompresses this high-temperature and high-pressure liquid to convert it into low-temperature and low-pressure liquid, thus facilitating evaporation with the cooler.

��Through the cooler, the low-temperature and low-pressure gas produced through the pressure reducing mechanism draws heat from oil to evaporate (cool the oil), thus providing low-temperature and low-pressure gas.

The Oil Cooling Unit is a cooling unit using a refrigeration cycle shown in Figure above, which is different from air conditioners in the object to cool. The Oil Cooling Unit is subject to cooling of oil, while air conditioners are subject to cooling of air. Consequently, knowledge required for basic services is the same as that for air conditioners but different in some points particularly from the air conditioners. The following section describes these different points.

1. Functions of Electronic Expansion Valve The electronic expansion valve is used for capacity control at a frequency below the minimum compressor operating frequency, thus having characteristics shown below. qWhile in low capacity operation, the electronic expansion valve uses the low-pressure region, which no air conditioners use. wThe fully closed point of electronic expansion valve (fully closed pulse of EV valve) should be set with the PC board by each unit. (In order to replace the EV valve or PC board, pay attention to this point.)

2. Oil Pump Since the Oil Cooling Unit is subject to cooling of oil, an oil pump is incorporated in place of a fan on the indoor side. The following section describes the features of the oil pump. qWhen the external resistance reaches 0.5 MPa or more, the relief valve will be activated. wSince the external resistance block (field piping) is an item to be designed by the user, attention should be paid.

3. Characteristics of Electrical System Basically, the electrical system is the same as that of air conditioners but has the following characteristics. qThe Oil Cooling Units has nothing equivalent to the operation switch. Be noted that the Oil Cooling Unit starts running as soon as the power supply turns ON. Normally, the Oil Cooling Unit exchanges signals with a machine tool and runs under ON-OFF control on the machine tool side. wThe Oil Cooling Unit has an enhanced readout function of internal product data. Refer to information in "7 Troubleshooting" to conduct servicing. 8

Standard Specifications

For AKZ Series

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For AKZJ Series ��

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9

2 Standard Specifications

2 List of Basic Performance/Specifications

2-1. AKZ Series 0.5

1.2

1.5

AKZ148

AKZ328

AKZ438

Oil Cooling Unit equivalent horsepower (HP) Model name

Stan -dard

Cooling capacity (50/60 Hz)

Circuit voltage Max. power consumption Max. current consumption

-H

kW

-T/-T1 *3

-B -C

-H

—

—

1

—

-H

-T/-T1 *3

—

—

1

3-phase, 200/200 · 220VAC, 50/60 Hz

*4

*4

DC12/24V 1.20kVA/3.5A

1.70kVA/5.3A

2.31kVA/6.6A

200V 60Hz

1.32kVA/3.7A

1.73kVA/5.5A

2.35kVA/6.8A

220V 60Hz

1.33kVA/3.9A

1.75kVA/5.7A

—

—

2.6kVA

2.45kVA/7.0A 2.6kVA

—

2.6kVA

White mm

650�360�440 950�360�440

820�360�465 950�360�440 /*3

790�360�440 1090�360�440

1055�360�465 1225�360�465 1090�360�440 990�360�440 1290�360�440 1290�360�440 /*3 /*3

0.75 kW or equivalent



Shell end coil type

Evaporator

Cross fin coil type

Condenser Fan

-E *4

—

200V 50Hz

Compressor (Hermetic DC swing type)

Type

Propeller fan

Motor

φ 300 mm, 75 W

Type

Trochoid pump 0.4kW�4P

Motor Discharge rate

L/min

12/14.4

Emergency opening pressure

MPa

0.5

24/28.8 0.6

Synchronization Fixed type type

(Selectable) Temperature control

Reference

Room temperature or unit temperature *5 (Factory set to Room temp. Mode 3)

Subject to control

inlet or outlet oil temperature (Factory set to inlet oil temperature)

Sync. range

-9.9 to +9.9 against reference temperature (Factory set to 0.0)

K

Inlet or outlet oil temperature

Subject to control

5 to 50

˚C

Range

Inverter control for Compressor revolutions + EV valve opening

Refrigerant control Refilling quantity of refrigerant (New refrigerant: R410A)*6

0.49

kg

0.72

0.98

Overcurrent relay (pump motor), Reverse phase protector, Restart prevention timer, Low room temperature protection thermostat, High oil temperature protection thermostat, Low oil temperature protection thermostat, Pump relief valve, Discharge pipe temperature thermostat, Condenser temperature thermostat, Refrigerant leakage detector, a set of inverter protectors, High pressure switch (-C only), Compressor protection thermostat (-C only), Overheat prevention temperature thermostat (-H only), and Boil-dry prevention switch (-H only)

Safety devices

Operating range

5 to 45

Room temperature

˚C

Inlet oil temperature

˚C

5 to 50

Oil viscosity

mm2/S

1.4 to 200 (ISO VG2 to 32)

Pressure loss outside product

Discharge side Suction side

0.5 MPa or less Within -30.7 kPa Lubricating oil/Mineral oil based hydraulic fluid (However, not applicable to phosphate ester based hydraulic fluid, water, water-soluble liquid, chemicals, foods, fuels, cutting/grinding fluid, etc.)

Applicable oil

Rc3/4

Oil outlet Rc3/4

Oil inlet

Rc1 1/4

Rc3/4

Rc1 1/4

Noise level (1 m from front, 1 m above: anechoic chamber equivalent)

dB (A)

Rc1 1/4

62

Rc3/4

65

Vertical 14.7 m/S2 (1.5G) � 2.5 Hr (However, 10 to 100 Hz sweep/5 min.)

Transportation vibration performance Mass

kg

52

Wiring circuit breaker (rated current)

A

— 10

Oil tank (capacity)

L


Rc3/4

Rc1/4 (Plug stop)

Oil drain

62

67

110

— —

15

58

68

88

— 10 —

116

— —

A

Note) *1. The cooling capacity represents figures at a standard point (of inlet oil temperature: 35˚C, room temperature: 35˚C, and oil viscosity: ISO VG32), subject to product tolerance of approximately ±5%. *2 Voltage fluctuation range is to be within ±10%. If the voltage fluctuates outside the range of ±10%, separate consultation will be recommended. *3 The outline dimensions for T1 specification units are as shown below. AKZ148-T1: 810 � 360 � 535 AKZ328-T1: 980 � 360 � 535 AKZ438-T1: 1180 � 360 � 535

10

-B -C

3-phase, 200/200 · 220VAC, 50/60 Hz

Coated color

Connection piping

Stan -dard

3.8/4.3

1

Operation circuit

Outline dimensions (H�W�D)

Local procurement*7

-E *4

3-phase, 200/200 · 220VAC, 50/60 Hz

*4

Main circuit

Transformer capacity

Oil pump

-T/-T1 *3 2.8/3.2

3-phase, 200/200 · 220VAC, 50/60 Hz

*2

Stan -dard

-E *4

1.3/1.4

kW

*1

Heater Power supply

-B -C

30/20

67

77

— 10 —

97

125

— —

30/20

—

10

*4 Different voltage units are available in three models, i.e., -E1, -E2, and -E3, subject to the power supply. E1: 3-phase, 220/230V, 50/60 Hz E2: 3-phase, 380/400/415V, 50/60 Hz E3: 3-phase, 440/460/480V, 50/60 Hz *5 The machine body synchronization thermistor, which is an optional part, is required. *6 -C Models are provided with MSDS (Material Safety Data Sheet) of R410A refrigerant. *7 This part should be separately procured by the customer. (A circuit breaker should be mounted on the main machine side, including -B Model.)



Stan -dard

kW

Heater

kW

Power supply Circuit voltage Max. power consumption Max. current consumption

-C

3.0 AKZ908

-H

-T

-C

—

3-phase, 200/200 · 220VAC, 50/60 Hz

—

-T

3

—

3-phase, 200/200 · 220VAC, 50/60 Hz

*3

*3

DC12/24V

Operation circuit 200V 50Hz

3.21kVA/9.4A

5.02kVA/15.2A

200V 60Hz

3.30kVA/9.5A

5.14kVA/15.6A

220V 60Hz

3.34kVA/9.2A —

5.20kVA/14.5A 5kVA

—

6kVA

White mm

1110�470�560 1410�470�560 1375�470�580 1360�470�590 1220�560�620 1520�560�680 1485�560�700 1470�560�695 1.5 kW or equivalent


2.2 kW or equivalent Shell end coil type

Evaporator

Cross fin coil type

Condenser

Propeller fan

Type

Fan

-E *3

3-phase, 200/200 · 220VAC, 50/60 Hz

Main circuit

Coated color

φ 400mm, 90W�4P

Motor

φ 450mm, 150W�4P

Type

Trochoid pump

Motor

0.75kW�4P

Discharge rate L/min

30/36

Emergency opening pressure

0.6

MPa



Reference


Subject to control

inlet or outlet oil temperature (Factory set to inlet oil temperature)

Sync. range


K

Inlet or outlet oil temperature

Subject to control

5 to 50

˚C

Range


Refrigerant control Refilling quantity of refrigerant (New refrigerant: R410A) *5

1.25

kg

1.53

Overcurrent relay (pump motor), Reverse phase protector, Restart prevention timer, Low room temperature protection thermostat, High oil temperature protection thermostat, Low oil temperature protection thermostat, Pump relief valve, Discharge pipe temperature thermostat, Condenser temperature thermostat, Refrigerant leakage detector, a set of inverter protectors, High pressure switch (-C only), Compressor protection thermostat (-C only), Overheat prevention temperature thermostat (-H only), and Boil-dry prevention switch (-H only)

Safety devices

Operating range

5 to 45

Room temperature

˚C

Inlet oil temperature

˚C

5 to 40

Oil viscosity

mm2/S

1.4 to 200 (ISO VG2 to 32)

Pressure loss outside product

Discharge side Suction side

0.5 MPa or less Within -30.7 kPa Lubricating oil/Mineral oil based hydraulic fluid (However, not applicable to phosphate ester based hydraulic fluid, water, water-soluble liquid, chemicals, foods, fuels, cutting/grinding fluid, etc.)

Applicable oil Connection piping

-H 8.0/9.0

2

—

*2


Oil outlet

Rc 1 1/4

Oil inlet

Rc 1 1/4

Oil drain

Rc1/4 (Plug stop)

Noise level (1 m from front, 1 m above: anechoic chamber equivalent)

dB (A)

65

Mass

kg


A

Oil tank (capacity)

L


A

67

Vertical 14.7 m/S2 (1.5G) � 2.5 Hr (However, 10 to 100 Hz sweep/5 min.)

Transportation vibration performance

Local procurement*7

-B

5.0/5.6


Oil pump

Stan -dard

-E *3


Cooling capacity (50/60 Hz) *1

-B

2.0 AKZ568

97 —

115

130

182

—

15 —

50 15

125 —

—

150

160

20

210

— —

70

—

20

Note) *1. The cooling capacity represents figures at a standard point (of inlet oil temperature: 35 ˚C, room temperature: 35 ˚C, and oil viscosity: ISO VG32), subject to product tolerance of approximately ±5%. *2 Voltage fluctuation range is to be within ±10%. If the voltage fluctuates outside the range of ±10%, separate consultation will be recommended. *3 Different voltage units are available in three models, i.e., -E1, -E2, and -E3, subject to the power supply. E1: 3-phase, 220/230V, 50/60 Hz E2: 3-phase, 380/400/415V, 50/60 Hz E3: 3-phase, 440/460/480V, 50/60 Hz *4 The machine body synchronization thermistor, which is an optional part, is required. *5 -C Models are provided with MSDS (Material Safety Data Sheet) of R410A refrigerant. *6 This part should be separately procured by the customer. (A circuit breaker should be mounted on the main machine side, including -B Model.)

11

2 Standard Specifications 2-2. AKZJ Series 0.5

1.2

1.5

AKZJ188

AKZJ358

AKZJ458


Stan -dard


-H

Stan -dard

-B

—

1

— *3

—

1.07kVA/3.1A

1.35kVA/5.7A

200V 60Hz

1.09kVA/3.2A

1.35kVA/5.6A

220V 60Hz

1.07kVA/2.8A

1.62kVA/6.1A

—

-B

-C

Same as Standard unit Same as Standard unit Same as Standard unit

1

1.76 kVA/5.2A

1.76 kVA/5.9A

1.78 kVA/5.2A

1.78 kVA/5.8A

1.79 kVA/4.9A

1.79 kVA/6.3A

2.2 kVA

— *3

—

-E *3

1

—

3-phase, 200/200 · 220VAC, 50/60 Hz


—

Coated color

980�360�440

mm

980�450�630

1120�360�440

0.4kW or equivalent


1.94kVA/5.7A

1.94 kVA/5.9A

1.96kVA/5.7A

1.96 kVA/5.8A

1.98kVA/5.3A

*3

1.98 kVA/6.3A


2.2kVA

—

2.2kVA

1120�450�630

1320�360�440

1320�450�630

0.75kW or equivalent

1.1kW or equivalent

Open coil type

Evaporator

Cross fin coil type

Condenser Type

Propeller fan

Motor

φ 300mm, 75W

Type

Trochoid agitator

Motor

1-pahse, 50W, 4P

Reference


Subject to control

Tank liquid temperature

Agitator

-H

4.2/4.5

White




Sync. range


K


Subject to control Range

5 to 50

˚C


Refrigerant control Refilling quantity of refrigerant *5

Operating range

Room temperature

0.58

kg

0.81

1.15

Fan motor inner thermostat, Agitator inner thermostat, Reverse phase protector, Restart prevention timer, Low room temperature protection thermostat, High oil temperature protection thermostat, Low oil temperature protection thermostat, Discharge pipe temperature thermostat, condenser temperature thermostat, Refrigerant leakage detector, a set of inverter protectors, No-fuse circuit breaker (-B only), High pressure switch (-C only), Compressor protection thermostat (-C only), Overheat prevention temperature thermostat (-H only), and Fuse (-H only)

Safety devices

5 to 45

˚C


˚C

5 to 50

Oil viscosity

mm2/S

0.5 to 200 Water-soluble cutting/grinding fluid, cutting/grinding oil, Lubricating oil, Hydraulic fluid, and Industrial water (However, not applicable to chemicals, foods, and fuels)

Applicable oil Noise level (1 m from front, 1 m above: anechoic chamber equivalent)

dB(A)

62


Vertical 14.7 m/S2 (1.5G) � 2.5 Hr (However, 10 to 100 Hz sweep/5 min.) 38

kg


A


A

Local procurement *6

Stan -dard

DC12/24V

200V 50Hz


(New refrigerant: R410A)

-E *3

3-phase, 200/200 · 220VAC, 50/60 Hz

Operation circuit

Fan

-H

3-phase, 200/200 · 220VAC, 50/60 Hz

Main circuit

Max. power consumption Max. current consumption

-C 3.2/3.5

3-phase, 200/200 · 220VAC, 50/60 Hz

*2

-E *3

1.6/1.8

kW

Power supply

-C

kW

*1

Heater

Circuit voltage

-B

Other than wiring circuit breaker

—

10

41 —

103

44 —

47

10

—

109

53 —

10

56

118

—

10 Oil tank (400 mm or more in depth), Feed pump, Float switch, and return filter


12



Standard


Circuit voltage

3.0 AKZJ908

-C

-H

-E *3

—

kW

2

—

-E *3

4

—

3-phase, 200/200 · 220VAC, 50/60 Hz

*3

*3

DC12/24V

200V 50Hz

3.3kVA/9.4A

4.0kVA/11.4A

Same as Standard unit

3.9kVA/11.2A

7.5kVA/21.6A


200V 60Hz

3.3kVA/9.4A

4.0kVA/11.4A


4.1kVA/11.7A

7.5kVA/21.6A


220V 60Hz

3.4kVA/9.0A

4.8kVA/12.5A


4.3kVA/11.2A

9.0kVA/23.7A


—


5kVA

Coated color 1450�470�500

mm

1450�560�710

1.5kW or equivalent


1630�560�620

1630�655�830

2.2kW or equivalent Cross fin coil type

Condenser

Propeller fan

Type φ 400 mm, 90 W � 4P

Motor

φ 450 mm, 150 W � 4P Trochoid agitator

Type

Agitator

6kVA

Open coil type

Evaporator

Fan

— White




Motor

1-pahse, 50W, 4P

Reference


Subject to control


Sync. range


K


Subject to control Range

5 to 50

˚C


Refrigerant control Refilling quantity of refrigerant *5

Operating range

Room temperature

1.25

kg

1.65

Fan motor inner thermostat, Agitator inner thermostat, Reverse phase protector, Restart prevention timer, Low room temperature protection thermostat, High oil temperature protection thermostat, Low oil temperature protection thermostat, Discharge pipe temperature thermostat, condenser temperature thermostat, Refrigerant leakage detector, a set of inverter protectors, No-fuse circuit breaker (-B only), High pressure switch (-C only), Compressor protection thermostat (-C only), Overheat prevention temperature thermostat (-H only), and Fuse (-H only)

Safety devices

5 to 45

˚C


˚C

5 to 50

Oil viscosity

mm2/S

0.5 to 200 Water-soluble cutting/grinding fluid, cutting/grinding oil, Lubricating oil, Hydraulic fluid, and Industrial water (However, not applicable to chemicals, foods, and fuels)

Applicable oil Noise level (1 m from front, 1 m above: anechoic chamber equivalent)

dB(A)

65


A


A

Other than wiring circuit breaker

68

Vertical 14.7 m/S2 (1.5G) � 2.5 Hr (However, 10 to 100 Hz sweep/5 min.) 83

kg

Wiring circuit breaker (rated current) Local procurement *6

-H

—

Operation circuit

(New refrigerant: R410A)

-C

3-phase, 200/200 · 220VAC, 50/60 Hz

Main circuit

Max. power consumption Max. current consumption

-B

8.0/9.0

3-phase, 200/200 · 220VAC, 50/60 Hz

*2

Standard

5.0/5.6

—

86

15

160 —

15

132 —

140

20 20

220 —

30

20

Oil tank (400 mm or more in depth), Feed pump, Float switch, and return filter


13


Heater Power supply

-B

kW

*1

2.0 AKZJ568

2 Standard Specifications 3 Operating Limits

3-1. Operating Range The Oil Cooling Unit has its operating limits. Be sure to use the Oil Cooling Unit in the range shown below.

50 45

Room temperature ( ℃)

40

30

20 15

O

p

e

ra

t

io

n

a

l

R

a

n

g

e

10

* "Tank liquid temperature" in the case of Dipping Open type (AKZJ Series)

5 5

10

15

20

30

35

40

50

Oil inlet temperature (℃)*

3-2. Applicable Oil Since this Oil Cooling Unit is designed for lubricating oils and hydraulic fluid (of mineral oil base), the following oil (liquid) is not applicable. 1) Flame-resistant hydraulic fluid

Phosphate ester base Chlorinated hydrocarbon base Water + Glycol base W/O, O/W emulsion base

2) Water and water-soluble liquid 3) Chemical liquid and fluid food 4) Cutting oil (fluid) and grinding oil (fluid) 5) Fuels including kerosene, gasoline, and others

14

3 Wiring Diagrams 1 AKZ Series

1-1. AKZ148 (-B) (-C) (-T), AKZ328 (-B) (-C) (-T), AKZ438 (-B) (-C) (-T) Wiring Diagram

Wiring Diagrams 1925750R

15

3 Wiring Diagrams 1-2. AKZ148-E1/E2/E3, 328-E1/E2/E3, 438-E1/E2/E3 Wiring Diagram

1925778D

16

Wiring Diagrams

1-3. AKZ148-H/328-H/438-H Wiring Diagram

Wiring Diagrams 1925806D

17

3 Wiring Diagrams 1-4. AKZ568 (-B) (-C) (-T), 908 (-B), (-C), (-T) Wiring Diagram

1925775G

18

Wiring Diagrams

1-5. AKZ568-E1/E2/E3, 908-E1/E2/E33 Wiring Diagram

Wiring Diagrams 1925799E

19

3 Wiring Diagrams 1-6. AKZ568-H/908-H Wiring Diagram

1925814E

20

2 AKZJ Series

Wiring Diagrams

2-1. AKZJ188 (-B) (-C), 358 (-B) (-C), 458 148 (-B) (-C) Wiring Diagram

Wiring Diagrams 1925776F

21

3 Wiring Diagrams 2-2. AKZ188-E1/E2/E3, 358-E1/E2/E3, 458-E1/E2/E3 Wiring Diagram

1925796D

22

Wiring Diagrams

2-3. AKZJ188-H/358-H/458-H Wiring Diagram

Wiring Diagrams 1925809C

23

3 Wiring Diagrams 2-4. AKZJ568 (-B) (-C), 908 (-B), (-C) Wiring Diagram

1925792D

24

Wiring Diagrams

2-5. AKZJ568-E1/E2/E3, 908-E1/E2/E33 Wiring Diagram

Wiring Diagrams 1925815B

25

3 Wiring Diagrams 2-6. AKZJ568-H/908-H Wiring Diagram

1925810E

26

MEMO

27

4 Piping Diagrams 1 AKZ Series

1-1. AKZ148 to 568 (-B) (-C) (-E1) (-E2), (-E3) No.

Part Name

Symbol

1

Compressor

M2C

2

Accumulator

—

3

Condenser

—

4

Fan

5

Evaporator

—

6

Rubber hose

—

7

Oil pump

8

Relief valve

9

Electronic expansion valve (EV valve)

10

Filter

11

High pressure switch(-C only)

12 13 14 15 16 17

Compressor protection thermostat(-C only) Outlet oil temperature thermistor Room temperature thermistor Inlet oil temperature thermistor Machine body synchronization thermistor EV valve outlet temperature thermistor

M3F

M1P — Y1E — S3PH S2B Th-2 Th-3 Th-4 Th-5 Th-6

Function This compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor. Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state. The feedback control of fan revolutions is performed for heat exchange through the condenser. Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas. Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment. Used to recirculate oil. The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level. The EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity. Used to prevent the entry of foreign matters in the EV valve. In order to avoid an increase of high pressure when a malfunction occurs, used to display the malfunction code “E3” if the high pressure reaches 4.1 MPa, thus stopping the system due to malfunction. When the compressor head exceeds a temperature of 115°C, used to display the malfunction code “E5”, thus stopping the system due to malfunction. Used to detect the oil outlet temperature (targeted control temperature) from the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. Used to detect the oil inlet temperature (targeted control temperature) to the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point. Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction. Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.

18

Condensing temperature thermistor

Th-7

19

Discharge gas temperature thermistor

Th-8

20

Pump outlet temperature thermistor

Th-10

21

Oil drain

—

Used to stop Rc1/4 at the plug. (The evaporator oil can be discharged from this oil drain for maintenance.)

25

Low-pressure gauge port

—

Used to mount a gauge for maintenance.

Used to detect the oil pump outlet temperature.

*For the layout of parts, refer to information on pages 44 and 45.

28

Piping Diagrams

AKZ148 to 568 (-B) (-C) (-E1) (-E2), (-E3)

��

��

Piping Diagrams

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��

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HCY400646D

29

4 Piping Diagrams 1-2. AKZ908 (-B) (-C) (-E1) (-E2), (-E3) No.

Part Name

Symbol

1

Compressor

M2C

2

Accumulator

—

3

Condenser

—

4

Fan

5

Evaporator

—

6

Rubber hose

—

7

Oil pump

8

Relief valve

9


10

Filter

11


12 13 14 15 16 17

Compressor protection thermostat(-C only) Outlet oil temperature thermistor Room temperature thermistor Inlet oil temperature thermistor Machine body synchronization thermistor EV valve outlet temperature thermistor

M3F

M1P — Y1E — S3PH S2B Th-2 Th-3 Th-4 Th-5 Th-6

18


Th-7

19


Th-8

21

Oil drain

—

25


—

Function This compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor. Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state. The feedback control of fan revolutions is performed for heat exchange through the condenser. Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas. Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment. Used to recirculate oil. The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level. The EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity. Used to prevent the entry of foreign matters in the EV valve. In order to avoid an increase of high pressure when a malfunction occurs, used to display the malfunction code “E3” if the high pressure reaches 4.1 MPa, thus stopping the system due to malfunction. When the compressor head exceeds a temperature of 115°C, used to display the malfunction code “E5”, thus stopping the system due to malfunction. Used to detect the oil outlet temperature (targeted control temperature) from the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. Used to detect the oil inlet temperature (targeted control temperature) to the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point. Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction. Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction. Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.) Used to mount a gauge for maintenance.

*For the layout of parts, refer to information on page 45.

30

Piping Diagrams

AKZ908 (-B) (-C) (-E1) (-E2), (-E3)

��

� �� Piping Diagrams

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HCY400655B

31

4 Piping Diagrams 1-3. AKZ148 to 438-T No.

Part Name

Symbol

1

Compressor

M2C

2

Accumulator

—

3

Condenser

—

4

Fan

5

Evaporator

—

6

Rubber hose

—

7

Oil pump

8

Relief valve

9


10

Filter

13 14 15 16 17

Outlet oil temperature thermistor Room temperature thermistor Inlet oil temperature thermistor Machine body synchronization thermistor EV valve outlet temperature thermistor

M3F

M1P — Y1E — Th-2 Th-3 Th-4 Th-5 Th-6

Function This compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor. Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state. The feedback control of fan revolutions is performed for heat exchange through the condenser. Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas. Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment. Used to recirculate oil. The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level. The EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity. Used to prevent the entry of foreign matters in the EV valve. Used to detect the oil outlet temperature (targeted control temperature) from the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. Used to detect the oil inlet temperature (targeted control temperature) to the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point. Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction. Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.

18


Th-7

19


Th-8

20


Th-10

21

Oil drain

—

22

Oil tank

—

23

Oil charge port & Air breather

—

24

Oil level indicator

—

Used to indicate oil quantity in the oil tank.

25


—


Used to detect the oil pump outlet temperature. Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.) Used to store oil at all times, thus responding to a sharp fluctuation in oil quantity in the piping system. Used to fill oil into the oil tank and normally serve as a ventilation hole for the oil tank.


32

Piping Diagrams

AKZ148 to 438-T

��

��

�

Piping Diagrams

��

��

��

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HCY400650C

33

4 Piping Diagrams 1-4. AKZ568-T No.

Part Name

Symbol

1

Compressor

M2C

2

Accumulator

—

3

Condenser

—

4

Fan

5

Evaporator

—

6

Rubber hose

—

7

Oil pump

8

Relief valve

9


10

Filter

13 14 15 16 17


M3F

M1P — Y1E — Th-2 Th-3 Th-4 Th-5 Th-6

Function This compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor. Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state. The feedback control of fan revolutions is performed for heat exchange through the condenser. Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas. Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment. Used to recirculate oil. The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level. The EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity. Used to prevent the entry of foreign matters in the EV valve. Used to detect the oil outlet temperature (targeted control temperature) from the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. Used to detect the oil inlet temperature (targeted control temperature) to the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point. Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction. Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction.

18


Th-7

19


Th-8

20


Th-10

21

Oil drain

—

22

Oil tank

—

23


—

24

Oil level indicator

—


25


—


Used to detect the oil pump outlet temperature. Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.) Used to store oil at all times, thus responding to a sharp fluctuation in oil quantity in the piping system. Used to fill oil into the oil tank and normally serve as a ventilation hole for the oil tank.


34

Piping Diagrams

AKZ568-T

�� Piping Diagrams

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��

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�

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HCY400666B

35

4 Piping Diagrams 1-5. AKZ908-T No.

Part Name

Symbol

1

Compressor

M2C

2

Accumulator

—

3

Condenser

—

4

Fan

5

Evaporator

—

6

Rubber hose

—

7

Oil pump

8

Relief valve

9


10

Filter

13 14 15 16 17


M3F

M1P — Y1E — Th-2 Th-3 Th-4 Th-5 Th-6

Function This compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor. Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state. The feedback control of fan revolutions is performed for heat exchange through the condenser. Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas. Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment. Used to recirculate oil. The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level. The EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity. Used to prevent the entry of foreign matters in the EV valve. Used to detect the oil outlet temperature (targeted control temperature) from the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. Used to detect the oil inlet temperature (targeted control temperature) to the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point. Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction. Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction. Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.) Used to store oil at all times, thus responding to a sharp fluctuation in oil quantity in the piping system. Used to fill oil into the oil tank and normally serve as a ventilation hole for the oil tank.

18


Th-7

19


Th-8

21

Oil drain

—

22

Oil tank

—

23


—

24

Oil level indicator

—


25


—



36

Piping Diagrams

AKZ908-T

��

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Piping Diagrams

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HCY400667A

37

4 Piping Diagrams 1-6. AKZ148 to 438-H No.

Part Name

Symbol

1

Compressor

M2C

2

Accumulator

—

3

Condenser

—

4

Fan

5

Evaporator

—

6

Rubber hose

—

7

Oil pump

8

Relief valve

9


10

Filter

13 14 15 16 17


M3F

M1P — Y1E — Th-2 Th-3 Th-4 Th-5 Th-6

18


Th-7

19


Th-8

20


Th-10

21

Oil drain

22 23

Boil-dry protection pressure switch Overheat prevention temperature thermostat

24

Heater

25 26

— S4PH S4B1

Function This compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor. Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state. The feedback control of fan revolutions is performed for heat exchange through the condenser. Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas. Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment. Used to recirculate oil. The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level. The EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity. Used to prevent the entry of foreign matters in the EV valve. Used to detect the oil outlet temperature (targeted control temperature) from the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. Used to detect the oil inlet temperature (targeted control temperature) to the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point. Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction. Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction. Used to detect the oil pump outlet temperature. Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.) Used to detect a drop of oil quantity in the piping system through a flow switch, thus stopping the system due to malfunction. Used to indicate the malfunction code “AA” to stop the system due to malfunction when heater oil temperature exceeds 70°C.

J1H

This is an electric heater used to heat oil.


—


Angle check valve

—

This valve is a “resistor” so as not to malfunction the pressure switch. Without the angle check valve, the system may erroneously recognize that there is no oil to stop running due to malfunction “AA”.


38

Piping Diagrams

AKZ148 to 438-H

��

��

Piping Diagrams

�

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HCY400665C

39

4 Piping Diagrams 1-7. AKZ568-H No.

Part Name

Symbol

1

Compressor

M2C

2

Accumulator

—

3

Condenser

—

4

Fan

5

Evaporator

—

6

Rubber hose

—

7

Oil pump

8

Relief valve

9


10

Filter

13 14 15 16 17


M3F

M1P — Y1E — Th-2 Th-3 Th-4 Th-5 Th-6

18


Th-7

19


Th-8

20


Th-10

21

Oil drain

22

Flow switch

S4PH

23

Overheat prevention temperature switch

S4B1

24

Heater

25


—

Function This compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor. Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state. The feedback control of fan revolutions is performed for heat exchange through the condenser. Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas. Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment. Used to recirculate oil. The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level. The EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity. Used to prevent the entry of foreign matters in the EV valve. Used to detect the oil outlet temperature (targeted control temperature) from the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. Used to detect the oil inlet temperature (targeted control temperature) to the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point. Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction. Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction. Used to detect the oil pump outlet temperature. Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.) Used to detect a drop of oil quantity in the piping system through a flow switch, thus stopping the system due to malfunction. Used to indicate the malfunction code “AA” to stop the system due to malfunction when heater oil temperature exceeds 70°C.

J1H


—



40

Piping Diagrams

AKZ568-H

��

��

Piping Diagrams

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HCY400679A

41

4 Piping Diagrams 1-8. AKZ908-H No.

Part Name

Symbol

1

Compressor

M2C

2

Accumulator

—

3

Condenser

—

4

Fan

5

Evaporator

—

6

Rubber hose

—

7

Oil pump

8

Relief valve

9


10

Filter

13 14 15 16 17


M3F

M1P — Y1E — Th-2 Th-3 Th-4 Th-5 Th-6

18


Th-7

19


Th-8

21

Oil drain

22

Flow switch

S4PH

23

Overheat prevention temperature switch

S4B1

24

Heater

25


—

Function This compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor. Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state. The feedback control of fan revolutions is performed for heat exchange through the condenser. Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas. Located at the entrance to and the exit of the oil pump and used to prevent the vibrations of the oil pump from transmitting to the piping system and equipment. Used to recirculate oil. The relief valve is a protective device to be activated when the pressure of oil piping system reaches the specified level or higher, thus setting the pressure back to the normal level. The EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity. Used to prevent the entry of foreign matters in the EV valve. Used to detect the oil outlet temperature (targeted control temperature) from the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. Used to detect the oil inlet temperature (targeted control temperature) to the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point. Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction. Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction. Used to stop Rc1/4 at the plug. (The evaporator oil can be discharges from this oil drain for maintenance.) Used to detect a drop of oil quantity in the piping system through a flow switch, thus stopping the system due to malfunction. Used to indicate the malfunction code “AA” to stop the system due to malfunction when heater oil temperature exceeds 70°C.

J1H


—



42

Piping Diagrams

AKZ908-H

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HCY400672

43

4 Piping Diagrams 1-9. Layout of Functional Parts AKZ148 to 438

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No.

Part Name

No.

Part Name

No.

Part Name

q

Compressor

i

Relief valve

!5

Inlet oil temperature thermistor

w

Accumulator

o

Electronic expansion valve

!7

EV valve outlet temperature thermistor

e

Condenser

!0

Filter

!8


r

Fan

!1

High pressure switch

!9


t

Evaporator

!2

Compressor protection thermostat

@0


y

Rubber hose

!3

Outlet oil temperature thermistor

@1

Oil drain

u

Oil pump

!4

Room temperature thermistor

@2


44

Piping Diagrams

AKZ568/908 ��


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No.

Part Name

No.

Part Name

No.

Part Name

q

Compressor

i

Relief valve

!5

Inlet oil temperature thermistor

w

Accumulator

o


!7


e

Condenser

!0

Filter

!8


r

Fan

!1


!9


t

Evaporator

!2


@1

Oil drain

y

Rubber hose

!3

Outlet oil temperature thermistor

@2


u

Oil pump

!4


45

4 Piping Diagrams 2 AKZJ Series

2-1. AKZJ188 to 908 (-B) (-C) (-E1) (-E2), (-E3) (-H) No.

Part Name

Symbol

1

Compressor

M2C

2

Accumulator

—

3

Condenser

—

4

Fan

5

Cooling coil

6


7

Strainer

8


9 10 11 12 13

Compressor protection thermostat(-C only) Room temperature thermistor Liquid temperature thermistor Machine body synchronization thermistor EV valve outlet temperature thermistor

M3F — Y1E — S3PH S2B Th-3 Th-4 Th-5 Th-6

14


Th-7

15


Th-8

16

Agitator motor

M1K

17

Feed pump

18

Heater

19


— J1H —

Function This compressor is a swing compressor with a built-in DC motor, which is driven under the inverter control by changing the operating frequency according to values specified under the capacity control. The accumulator is installed before the compressor suction and used to prevent the entry of liquid refrigerant in the compressor and further efficiently return lubricating oil to the compressor. Used to air cool the refrigerant to turn it from high-temperature and-pressure gaseous state to high-temperature and -pressure liquid state. The feedback control of fan revolutions is performed for heat exchange through the condenser. Used to heat low-temperature, low-pressure liquid refrigerant decompressed through the electronic expansion valve (with oil being cooled) to make it low-temperature, low-pressure gas. The EV valve varies its opening according to values specified under the capacity control, thus making the control of refrigerant recirculation quantity. Used to prevent the entry of foreign matters in the EV valve. In order to avoid an increase of high pressure when a malfunction occurs, used to display the malfunction code “E3” if the high pressure reaches 4.1 MPa, thus stopping the system due to malfunction. When the compressor head exceeds a temperature of 115°C, used to display the malfunction code “E5”, thus stopping the system due to malfunction. Used to detect the synchronization source temperature while in synchronization temperature control mode. Used to detect the oil inlet temperature (targeted control temperature) to the evaporator. Used to detect the synchronization source temperature while in synchronization temperature control mode. While in zero point adjustment, used to detect variations in the EV valve outlet temperature, thus recognizing the Fully Closed point. Used to detect the condensing temperature and, when the condensing temperature reaches a high level, thus displaying the malfunction code “E3” to stop the system due to malfunction. Used to detect the discharge pipe temperature and, when the discharge pipe temperature exceeds 112°C, thus displaying the malfunction code “E5” to stop the system due to malfunction. Used to rotate the agitator propeller provided within the open coil for efficient cooling/heating of the oil in the oil tank. This feed pump is to be locally procured. This is an electric heater used to heat oil and only provided in units with the suffix -H. Used to mount a gauge for maintenance.


46

Piping Diagrams

AKZJ188 to 908 (-B) (-C) (-E1) (-E2), (-E3) (-H)

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HCY400668A

47

4 Piping Diagrams 2-2. Layout of Functional Parts AKZJ188 to 908 �

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No.

Part Name

No.

Part Name

No.

Part Name

q

Compressor

u

Strainer

!4


w

Accumulator

i


!5


e

Condenser

o


!6

Agitator motor

r

Fan

!0


!7

Heater

t

Cooling coil

!1

Liquid temperature thermistor

!8


y


!3


48

5 Control Panel

1 Name and Function of Each Part ��

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No.

w

e

r

Lamp display block A

Lamp display block B

Mode No./ Data No. display

Data display

Display Display

Name

 POWER

Power supply lamp

This lamp will light up at all time when the power supply turns ON.

 ALARM

Malfunction lamp

This lamp will blink or light up when a malfunction occurs.

 TIMER

Timer lamp

This lamp will light up while the system stops in timer mode.

 NORMAL

Normal mode

This lamp will light up while normal mode is selected and blink while in auto tuning mode or special monitor mode.

 SETTING

Operation setting mode

This lamp will light up while in operation setting mode and blink while in parameter setting mode.

 MONITOR

Monitor mode

This lamp will light up while monitor mode is selected and blink while in service mode.

 TIMER

Timer setting mode

This lamp will light up while in timer setting mode.

—

Used to display the following contents while in each mode. • Normal or operation setting mode ……… The current operation mode No. is displayed. • Monitor setting mode ……… No. of data that is displayed on the data display block is displayed. • Parameter setting mode ……… “P” is displayed while in parameter setting.

—

Used to display a variety of data. (Data displayed varies with setting mode or data No.)

MODE

DATA

SELECT button

t

Operation button

Operation/Function

Used to switch each mode.

DOWN button Used to decrease Mode No./Data No./Data Value by 1. UP button SAVE button

Used to increase Mode No./Data No./Data Value by 1. Used to save Mode No./Data No./Data, the setting of which is being changed. 49

Control Panel

q

Item

5 Control Panel Nine operation modes listed in Table below are available on the control panel. For normal operation, modes 1 to 4 and 8 and 9 are used. Other modes 5, 6, and 7 may interfere with the operation of the Oil Cooling Unit. Therefore, before using, be sure to thoroughly understand the functions of these modes. Mode

Function

LED status “NORMAL” lamp ON

1

Normal mode

Used to display the current “operation mode” and “target temperature”. When the power supply turns ON, the system will be automatically brought to this mode.

2

Operation setting mode

Used to change the setting of “operation mode” and “target temperature”

“SETTING” lamp ON

3

Monitor mode

Used to display values detected by each sensor.

“MONITOR” lamp ON

4

Time setting mode

Used to make ON timer setting.

“TIMER” lamp ON

5

Operation lock mode (factory setting)

Used to stop the operation of Oil Cooling Unit regardless of setting conditions.

All lamps except for “POWER” OFF

6

Parameter setting mode

Used to make settings shown below. qTo make setting of combination of signals output to external contact when a malfunction or warning occurs. wTo make automatic setting of controlled variables for PI control. eTo make manual setting of controlled variables for PI control. rTo make warning setting for the protection of devices.

“SETTING” lamp blinking

7

Auto tuning mode

Used to automatically compute controlled variables for PI control and set them with parameters.

“NORMAL” lamp blinking

8

Special monitor mode

Used to check for a variety of current data.

“NORMAL” lamp blinking

9

Service monitor mode

Used to check for the history of malfunction codes and a variety of data.

“MONITOR” lamp blinking

(1) Mode shifting operation Normally, use the

button to shift mode.

In order to shift to special mode, press and hold multiple buttons in combination for a period of two seconds. ��

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CAUTION ��

50

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The system is set to “operation lock mode” at factory. To start operation, release the operation lock mode.

If the malfunction prevention switch on the main PC board turns ON, no operation settings will be made. If so, turn OFF this switch.

Control Panel

2 Operation Procedure by Mode 2-1. Normal Mode

When the power supply turns ON, the system will be automatically brought to this mode. This mode is used to display the following contents according to the status of the Oil Cooling Unit. Status

Normal operation

Display of control panel

NORMAL

NORMAL

TIMER

MODE

POWER

ALARM

TIMER

MONITOR

NORMAL

MODE

POWER

DATA

ALARM

SETTING MONITOR MODE

DATA

TIMER

• POWER lamp: ON • ALARM lamp: Blinking when the malfunction level 1 occurs ON when the malfunction level 2 occurs • MODE: OFF • DATA: Blinking malfunction code displayed • POWER lamp: ON • MODE: OFF • DATA: Blinking ‘LOC’ displayed To unlock, press and hold the for a period of two seconds. While operation lock mode, the Oil Cooling Unit stops all operations including the pump operation.

51

Control Panel

TIMER

• POWER lamp: ON • MODE: Operation mode No. displayed • DATA: Target operating temperature displayed

DATA

SETTING TIMER

Operation locked

ALARM

MONITOR TIMER

Malfunction

POWER

SETTING

Remarks

5 Control Panel 2-2. Operation Setting Mode This mode is used to make settings of operation mode and target temperature. Furthermore, if the malfunction prevention switch on the main PC board turns ON, no operation mode settings will be made. In this case, turn OFF this switch to make these settings.

[Setting procedure] (1) Turn ON the power supply. When the power supply turns ON, the system will be brought to “normal mode” to display the current operation mode and target control value. (2) Shift to “operation setting mode”. While in normal mode, press the

button to shift to “operation setting mode”. (The MODE display will blink.)

(3) Select mode No. Press the

or

button to select a desired mode No. (The MODE display will remain blinking.)

Press the

button to save the mode No. (The MODE display will light up and the DATA display will blink.)

(4) Make setting of target temperature. Press the

or

button to set to a desired target temperature. (The DATA display will remain blinking.)

Press button to save the target temperature. (The DATA display will light up.) (5) Return to normal mode. Press the

button three times to return to normal mode.

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�� (For reference) Mode and data will be saved when the displayed.

��

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�� button is pressed with the data block blinking and

If the button is pressed before saving, the mode and data in process of changing will be discarded and the system will keep running under the previous setting.

52

Control Panel

 List of operation modes Setting item

Mode No.

AKZ Series

Settable range

AKZJ Series

0

Inlet oil temperature under fixed temperature control (*1)

Liquid temperature under fixed temperature control (*1)

1

Outlet oil temperature under fixed temperature control (*1)

(Not used)

2

(Not used)

(Not used)

5.0 to 50.0°C (Factory set to 20.0°C)

—

Inlet oil temperature offset value under Liquid temperature offset value under 3 room temperature synchronization room temperature synchronization (Factory setting) control (*2) control (*2) Inlet oil temperature offset value under machine body temperature synchronization control (*2)

Liquid temperature offset value under machine body temperature synchronization control (*2)

5

Outlet oil temperature offset value under room temperature synchronization control (*2)

(Not used)

6

Outlet oil temperature offset value under machine body temperature synchronization control (*2)

(Not used)

7

(Not used)

(Not used)

—

8

(Not used)

(Not used)

—

9

Cooling capacity under direct capacity control (*3)

Cooling capacity under direct capacity control (*3)

4

-9.9 to 9.9°C (Factory set to 0.0°C)

Control Panel

0 to 100% (Factory set to 0%)

*1. Fixed temperature control: The set value is used as a target temperature for this control. *2. Synchronization control: The target temperature is used as a value calculated by the following expression for this control. Target temperature = Base temperature for synchronization + Offset value Set value above • In the case of room temperature synchronization control, a value detected by the room temperature thermistor (Th-3) • In the case of machine body synchronization control, a value detected by the machine body synchronization thermistor (Th-5: Option) However, if the result of calculation falls short of 5.0°C, the target temperature will be adjusted to 5.0°C. If it exceeds 50.0°C, the target temperature will be adjusted to 50.0°C. *3. Direct capacity control: Used to control the cooling capacity as set. (Setting the capacity to 0% will stop the compressor.) Note 1) Setting operation mode to No. 4 or No. 6 without mounting the machine body synchronization thermistor (Th-5: Option) will display the malfunction code “H1” to disable the compressor operation. 2) Depending on the model of Oil Cooling Unit, some of the operation modes will not be functional. If the operation mode selected is not functional, the data block will display “— — —” to disable settings. 53

5 Control Panel 2-3. Monitor Mode This mode is used to display temperatures detected by each sensor and Inlet/Outlet status. Using the

��

or

button makes it possible to select data No.

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Contents

Data No.

AKZ Series

AKZJ Series

0

Machine body temperature (Th-5) *1 Machine body temperature (Th-5) *1

1

Outlet oil temperature (Th-2) *1 Not used

*1

2

Room temperature (Th-3)

*1 Room temperature (Th-3)

*1

3

Inlet oil temperature (Th-4)

*1 Inlet oil temperature (Th-4)

*1

4

Pump outlet temperature (Th-10) *1 Pump outlet temperature (Th-10) *1

5

Difference in temperature between Not used oil inlet and outlet (Th-4 - Th-2) *1

6

Value instructed by direct capacity control (%)

7

Revolutions of INV compressor (rps) Revolutions of INV compressor (rps)

8

Spare

9

Setting status with communication Setting status with communication PC board (option) mounted PC board (option) mounted

Value instructed by direct *1 capacity control (%)

*1 *1

Spare

*1: If the thermistor is not connected or contains a broken wire, 99.9 will be displayed for the temperature.

2-4. Timer Setting Mode This mode is used to display ON timer setting and timer value (in hours up to a maximum of 99 hours). Use the or button to make setting of the timer value. Saving the input with the button will put the system into timer status, thus stopping the Oil Cooling Unit operation. To release the timer status, set the timer value to “0”. NORMAL

POWER

ALARM

TIMER

SETTING MONITOR TIMER

MODE

DATA

2-5. Operation Lock Mode This mode is used to lock the Oil Cooling Unit to the stop status and prohibit operations of buttons except for the UNLOCK button. While in a normal use mode (i.e., normal, operation setting, or monitor mode), press and hold the or for a period of two seconds. “Loc” on the data display block will blink to put the system into locked status. To release operation lock mode, also press and hold the NORMAL

POWER

ALARM

SETTING MONITOR TIMER

54

MODE

DATA

TIMER

or

button for a period of two seconds.

In order to start or stop the Oil Cooling Unit on the control panel, start with this operation.

mode

Control Panel

2-6. Parameter Setting Mode This mode is used to make settings of the following parameters to determine the basic operation of Oil Cooling Unit. Setting of external output procedure when a malfunction or warning occurs...........n01 to n03 Setting of conditions for auto tuning .........................................................................n04 and N05 Setting of gain rate for temperature control ..............................................................n06 to n09 Setting of monitoring subject for temperature warning.............................................n10, n12, n14, n16, and n18 Setting of operating temperature (difference) for temperature warning....................n11, n13, n15, n17 and n19 Setting of YES or NO of use of parallel communication ...........................................n20 Setting of minimum pulse for EV valve .....................................................................n24 Furthermore, if the malfunction prevention switch on the main PC board turns ON, no operation settings will be made. In this case, turn OFF this switch.

(1) Setting procedure With ‘P’ blinking in the MODE block, use the or button to select a parameter No. The DATA block displays the parameter No. selected for a period of approximately 0.5 seconds and then data. When the Use the

button is pressed, the DATA block will start blinking and displaying. or

button to change data and the

Pressing the

button to save the data.

button before saving the data will discard the data to return to the previous value.

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Control Panel

[Note] Parameters are classified into two groups: One group of parameters becomes enabled on the spot, while the other group of parameters requires turning ON the power supply again. To make judgment of which group the parameters belong to, refer to List of parameters.

5 Control Panel (2) List of parameters Parameter No

Item

Min. value

Max. value

Default value at Power reset required factory setting

Remarks

n00

(Not used)

0

0

0

—

n01

External output when a malfunction or warning occurs

0

11

0

O ut put s i gn a l to “60-61”, “60-63” and “66-67”

n02

Operation setting 1 for external signal input

0

3

0

Input signal from terminal Nos. “12-13”

n03

Operation setting 2 for external signal input

0

2

0

Input signal from connector CN2

n04

Setting of auto tuning end conditions

0.0

10.0

8.0

Setting of oil outlet drop temperature

n05

Setting of response coefficient for auto tuning

0.1

10.0

n06

Setting of control gain P (in the case of small temperature differential)

1

999

n07

Setting of control gain I (in the case of small temperature differential)

1

999

n08

Setting of control gain P (in the case of large temperature differential)

1

999

n09

Setting of control gain I (in the case of large temperature differential)

1

999

n10

Setting of monitoring subject for warning 1

0

465

0

n11

Setting of operating temperature for warning 1

0.0

60.9

0.0

n12


0

465

0

n13


0.0

60.9

0.0

n14


0

465

0

n15


0.0

60.9

0.0

n16


0

465

0

n17


0.0

60.9

0.0

n18


0

465

0

n19


0.0

60.9

0.0

n20

Setting of YES or NO of use of parallel communication

0

1

0

Option is required to provide.

N21 to n23

(Not used)

—

—

—

Never change the setting of these parameters. Doing so will result in a malfunction.

AKZ : 2.0 AKZJ : 7.0

AKZ : 40 AKZJ188 ~ 458 : 120 AKZJ568·908 • n06, n08 : 90 • n07, n09 : 30

—

Default value var ies with models.

Settings of “monitoring subject” and “operating temperature” to issue a temperature warning. Setting of a total of 5 items can be made. For details, refer to information in section “(4) Temperature warning” (on page 59 and later).

n24

Setting of minimum pulse for EV valve

0

999

Default value varies with types of EV valve.

In order to replace the main PC board or electronic expansion valve, the minimum pulse should be set to “0” and operation to detect fully open pulse should be performed. (For details, refer to pages 112 and 113.)

N25 to N38

(Not used)

—

—

—

Never change the setting of these parameters. Doing so will result in a malfunction.

56

Control Panel

(3) Parameter No. n01: External output when a malfunction or warning occurs When a malfunction or warning occurs, used to make setting of combination of output to each contact. Output to terminal block (X2M)

Tens place

One place

Output Malfunction output

Setting Terminal No. 60 – 61 60 – 63

Setting Terminal Output No. Warning output 66 – 67

0 (Factory setting) Power Normal Malfunction failure ON OFF

OFF ON

OFF ON

0 (Factory setting) Power Normal Warning failure ON OFF OFF

Normal

1 Power failure

Malfunction

OFF ON

OFF ON

ON OFF

Normal

1 Power failure OFF

Warning

OFF

ON

Output with communication PC board (option) used 0 (Factory setting)

1

When the warning 1 occurs: OFF When the warning 1 occurs: ON When the warning 2 occurs: OFF When the warning 2 occurs: ON When the warning 3 occurs: OFF When the warning 3 occurs: ON When the warning 4 occurs: OFF When the warning 4 occurs: ON When the warning 5 occurs: OFF When the warning 5 occurs: ON (Not used) When the malfunction level 1 occurs: OFF / When the malfunction level 2 occurs: ON When the malfunction occurs: OFF When the malfunction occurs: ON Common (+24V)

n02: OP contact level Used to make setting of operation for input signal (OP signal) to the connection terminals (12 and 13: OP terminals) of optional safety equipment on the terminal block (X2M). “0”: OP terminal not used (factory setting) “1”: Used to implement the malfunction level 1 when the connection terminals (12 and 13) turn OFF. “2”: Used to implement the malfunction level 2 when the connection terminals (12 and 13) turn OFF. “3”: Used to implement the malfunction level 1 (respond to the flow switch) when the connection terminals (12 and 13) do not turn ON after a lapse of 30 seconds since the pump starts operation. [Note] Just connecting the optional safety device to the OP terminals will not enable the protective function. Be sure to make this parameter setting. n03: OP2 contact level Used to setting of operation for input signal to the CN2 (OP2) on the main PC board (A1P). “0”: CN2 terminal not used (factory setting) “1”: Used to implement the malfunction level 1 when the CN2 contact turns OFF. “2”: Used to implement the malfunction level 2 when the CN2 contact turns OFF. [Note] The OP2 may be used for an option at factory setting. n04: Setting of auto tuning end conditions While in auto tuning mode, if the oil outlet temperature falls by the degree set with this parameter, the auto tuning will end. (For details, refer to information in Section 2-7.)

57

Control Panel

Setting Pin No. 1 (D0) 2 (D1) 3 (D2) 4 (D3) 5 (D4) 6 (D5) 7 (D6) 8 (D7) 9 (COM)

5 Control Panel n05: Setting of response coefficient for auto tuning Used to make setting of response coefficient to calculate the optimum control variable for auto tuning (Section 2-7). qMake this value smaller. . Stability will be upgraded, but responsiveness will be degraded. wMake this value larger. . Responsiveness will be upgraded, but stability will be degraded. n06 to n09: Setting of gain rate for temperature control • n06: Control gain P (in the case of small temperature differential) • n07: Control gain I (in the case of small temperature differential) • n08: Control gain P (in the case of large temperature differential) • n09: Control gain I (in the case of large temperature differential) Parameters n06 to n09 are used to make setting of gain for temperature control. In the case of small temperature differential between the control target and the control subject, use gains of n06 and n07. In the case of large temperature differential between the control target and the control subject, use gains of n08 and n09. n10, n12, n14, n16, and n18: Setting of monitoring subject for temperature warning Used to make setting of monitoring subject for temperature warning and also operation contents when conditions are met. n11, n13, n15, n17, and n19: Setting of operating temperature (differential) for temperature warning Used to make setting of operating temperature (differential) to issue a temperature warning. n20: Setting of YES or NO of use of parallel communication Used to make setting of whether or not to perform parallel data communication with the main machine. “0”: Not performed (Factory setting) “1”: Performed Setting this parameter to “0” with a communication extension PC board (option) connected will make it possible to use parallel output from the extension PC board as individual output of alarm status or temperature warning. n21 to n23: Not used Never change the setting of these parameters. Doing so will result in a malfunction. n24: Setting of minimum pulse for EV valve Used to make optimum setting of minimum pulse for the EV valve by equipment. (Factory setting to the optimum pulse for EV valve concerned.) n25 to n28: Not used Never change the setting of these parameters. Doing so will result in a malfunction.

58

Control Panel

(4) Temperature warning This function alerts you to the necessity to check for Oil Cooling Unit when the monitoring temperature exceeds the set temperature range. When the temperature warning is detected, operations of compressor, fan, and others will vary with settings (of operations after temperature warning is detected (C) as per table shown below). (4)-1. Detailed settings qBased on the following expression, make settings of “monitoring subject (a)”/“monitoring subject (b)” and “temperature to issue a warning (d)”. Temperature for monitoring subject (a) – Temperature for monitoring subject (b) = Temperature to issue a warning (d) wMake settings of “YES/NO of external output of warning signal (c)” and “Resetting procedure after warning (c)”. eMake setting of the following “differential value (e) to specify the resetting temperature. Resetting temperature = Temperature to issue a warning (d) ±(*) Differential value (e) *If the temperature to issue a warning is set to the lower limit, take “+”. If it is set to the upper limit, take “–”. (4)-2. Setting procedure Turning ON power supply: qTurn ON the power supply. (The system will be automatically put into “normal mode”.) Parameter setting mode: button for a period of two seconds or more will put the system into “parameter wPressing and holding the setting mode”. (The MODE block will display blinking “P”.) Control Panel

Settings of (a), (b), and (c): or button to set to a desired parameter No. (n10, n12, n14, n16, or n18). eUse the (After a lapse of 0.5 seconds, the DATA block will display data.) rUse the

or

button to set (a), (b), and (c) to desired Nos.,

��

respectively. tUse the

��

��

��

button to save the Nos.

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�� Monitoring subject (a) Setting No. 0

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Monitoring subject (b)

Display item AKZ Series

��

AKZJ Series

Setting No.

Display item AKZ Series

AKZJ Series

(Warning function is not used.)

0

1

Machine body temperature (Th-5) Machine body temperature (Th-5)

1

-Machine body temperature (Th-5) -Machine body temperature (Th-5)

2

Outlet oil temperature (Th2)

2

-Outlet oil temperature (Th2)

(Not used)

(Warning function is not used.) (Not used)

3

Room temperature (Th-3) Room temperature (Th-3)

3

-Room temperature (Th-3) -Room temperature (Th-3)

4

Inlet oil temperature (Th-4) Liquid temperature (Th-4)

4

-Inlet oil temperature (Th-4) -Liquid temperature (Th-4)

5

≥Fixed value

≥Fixed value

6

≤Fixed value

≤Fixed value

Operation after a temperature warning is detected (c) Setting No.

Display

0

5

Terminals 60-61/60-63

ON (*1) Warning (1E to 5E)

3 4

External output (*2) Terminals 66-67

(Warning function is not used.)

1 2

ON/OFF

Malfunction code “FH”

Automatic Compressor reset only forcedly stops. Manual reset

Warning output No output

No output Warning output

Malfunction output

No output Warning output

*1: “ON” follows thermostat ON/OFF control. *2: Output to external terminals follows the setting of parameter n01 (refer to page 57). 59

5 Control Panel Settings of (d), and (e): or button to set to a desired parameter yUse the No. (n11, n13, n15, n17, or n19). (After a lapse of 0.5 seconds, the DATA block will display data.)

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or button to set (d), and (e) to figures uUse the desired, respectively. iUse the

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button to save the figures.

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Returning to normal: oPress the

button to return to “normal mode”.

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(Reference) List of typical temperature warning settings AKZ Series Setting of monitoring subject (n10,n12,n14,n16,n18) No.

Item to monitor temperature

(a)

(b)

(c)

Setting of operating temperature (n11,n13,n15,n17,n19) (d)

Monitoring Monitoring Operation Temperature to subject (1) subject (2) after warning issue a warning 0

(e) Differential value.

1

When temperature warning is not used (factory setting)

0

0

0

0

2

When the oil outlet temperature is higher than the machine body temperature

2

1

1,4,5

—

3

When the oil outlet temperature is higher than the room temperature

2

3

1,4,5

—

4

When the oil outlet temperature is lower than the machine body temperature

1

2

1,2,3

5

When the oil outlet temperature is lower than the room temperature

3

2

1,2,3

6

When the oil inlet temperature is higher than the machine body temperature

4

1

1,4,5

7

When the oil inlet temperature is higher than the room temperature

4

3

1,4,5

8

When the oil inlet temperature is lower than the machine body temperature

1

4

1,2,3

9

When the oil inlet temperature is lower than the room temperature

3

4

1,2,3

10 When the oil outlet temperature is high

2

5

1,4,5

11 When oil inlet temperature is high

4

5

1,4,5

12 When the oil outlet temperature is low

2

6

1,2,3

13 When the oil inlet temperature is low

4

6

1,2,3

Make setting Make setting of of temperature range of 1 to 9. differential — range of 0 to 60. — Make setting of range of 1 to 9. — Make setting — of temperature differential Make setting of range of 0 to 60. range of 1 to 9.

AKZJ Series Setting of monitoring subject (n10,n12,n14,n16,n18) No.

Item to monitor temperature

(a)

(b)

(c)

Setting of operating temperature (n11,n13,n15,n17,n19) (d)

Monitoring Monitoring Operation Temperature to subject (1) subject (2) after warning issue a warning 1

When temperature warning is not used (factory setting)

0

0

0

2

When the liquid temperature is higher than the machine body temperature

4

1

1,4,5

3

When the liquid temperature is higher than the room temperature

4

3

1,4,5

4

When the liquid temperature is lower than the machine body temperature

1

4

1,2,3

5

When the liquid temperature is lower than the room temperature

3

4

1,2,3

6

When the liquid temperature is high

4

5

1,4,5

7

When the liquid temperature is low

4

6

1,2,3

60

0

(e) Differential value. 0

— Make setting — of temperature differential Make setting of range of 0 to 60. range of 1 to 9. Make setting — of temperature Make setting of differential range of 0 to 60. range of 1 to 9.

Control Panel

(4)-3. Display while in temperature warning

NORMAL

POWER

ALARM

TIMER

Warning display 1E

Operation according to setting with parameter Nos. “n10” and “n11”

2E


3E


4E


5E


SETTING MONITOR TIMER MODE

DATA

“ALARM” lamp: OFF Display of “DATA” block: Warning set number is blinked and displayed.

Content

Particularly, on the Oil Cooling Unit side, check for the following points. • Whether or not oil quantity is kept at the normal level. • Whether or not there is any obstacle in the vicinity of air supply/exhaust opening. • Whether or not the filter is clogged. • Whether or not the condenser gets dirty. • Whether or not an improper model is selected. • Whether or not capacity is stepping down (the room temperature and oil temperature are below 35°C). • Whether or not the system runs according to direct capacity control. • Whether or not refrigerant gas has leaked out. • Whether or not sensors get dirty or damaged. • Whether or not the setting of temperature warning is properly made.

61

Control Panel

(4)-4. Action against temperature warning If the temperature warning is executed according to low oil temperature protection, this warning will be automatically reset when the temperature reaches the warning reset temperature. In contrast, if the temperature warning is executed according to high oil temperature protection, the power supply should be turned ON again (manually reset). In each case, probe the causes of fluctuations in oil temperature both on the main machine and the Oil Cooling Unit sides.

5 Control Panel 2-7. Auto Tuning Mode This mode is used to automatically compute controlled variables for PI control and set them with parameter n6 to n9.

(1) Setting procedure Turning ON power supply: qTurn ON the power supply. (The system will be automatically put into “normal mode”.) Auto tuning mode: wPressing and holding the system into “auto tuning mode”. ��

buttons simultaneously for a period of two seconds or more will put the

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ePressing the

button will initiate the auto tuning.

(The system will automatically go through the following steps.) Step 0 Used to check for auto tuning conditions.

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Used to operate for the stabilization of initial conditions.

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Step 2 ��

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rPressing the

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End of auto tuning

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Used to compute and set the result with a parameter.

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Step 3

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Used to operate for gathering data on control subject.

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Step 1

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button will return the system to “normal mode”.

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Control Panel

Note) 1. Before putting the system into auto tuning mode, be sure to make setting of operation mode (except for No. 9 while in operation setting mode) in order to determine the thermistor subject to control. 2. Initiate auto tuning from the state in which the room temperature is approximately equal to the oil temperature (i.e., stable state). Furthermore, perform the auto tuning with no load (in a stop state) on the main machine side. 3. If an “error” occurs while in auto tuning, the auto tuning will be disabled. In this case, press the button to return the system to “normal mode”. Probe the causes of the error to take measures against the error and then perform the auto tuning again. 4. In Step 2, the system runs at 100% capacity. Consequently, oil may be overcooled. Make adjustment of overcooled oil with parameter No. 4 (Setting of auto tuning end conditions). (Set the conditions to as large value as possible to the extent that no damage is caused to the machine.) 5. In order to compute the optimum control variable based on data gathered, the setting of response coefficient should be made with the parameter No. 5. (Making the variable smaller provides a higher level of stability, while making it larger provides a higher level of responsiveness.) 6. Depending on the conditions of control subject (machine), the optimum control gain may not be computed at one time. In this case, perform multiple calculations to take an average value or use a mode value (except for an extreme value).

Control Panel

63

6 Functions

1 Operation Flow Chart ��

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64

Functions

2 Functions Function

Stop due to malfunction

1

Description When a malfunction occurs while in running, used to stop compressor or else for protection. Stop due to malfunction is classified into the following two levels. • Malfunction level 1: Compressor, pump, and fan all stop operation. • Malfunction level 2: Only the compressor stops running. (The pump and fan keep operating.) When the monitoring temperature exceeds the set temperature while in operation, used to stop the compressor or else. • Operation to stop: Only the compressor stops operation. (The pump and fan keep operating.) • Resetting procedure (Two procedures are available according to setting.)

Stop Stop due to temperature warning

A Automatic resetting - After a lapse of “standby for restart”, the system will automatically restart operation. B Manual resetting - After resetting the power supply on manual control, turning ON the circuit breaker again will restart operation. *For details of temperature warning setting procedure, refer to information on page 59 and later.

2

Standby Standby for restart

In order to prevent frequent ON/OFF operations of the compressor and equalize pressure within the refrigerant system, used to stand by for the restart of the compressor for a period of 30 seconds after the compressor stops. For models AKZ(J)148 to 568, in order to start the compressor, used to increase the operating frequency to 46 Hz once and then operate the compressor at the minimum operating frequency.

25Hz

s

38Hz

s

z/

2H

z/

46Hz

AKZ(J)908 Functions

3

Startup control

AKZ(J)148 ~ 568

2H

Startup control

Make ON/OFF judgment of the thermostat under the following conditions Judgment of thermostat against the set temperature. ON/OFF Thermostat ON condition: Detected temperature ≥ Set (target) temperature Thermostat OFF condition: Detected temperature < Set (target) temperature

4

In medium/high load regions (i.e., 60 to 100% of the product capacity), used to Compressor control the compressor operating frequency, thus making the oil temperature control (High-accuracy) corresponding to the target temperature. oil temperature Function In low load regions (i.e., 5 to 60% of the product capacity), used to control the control EV valve control EV valve opening, thus making the oil temperature corresponding to the target control temperature. Auto tuning control

5

Used to compute P/I gain for temperature control and then set it to parameter concerned.

When high pressure shows an abnormal rise, used to stop only the compressor due to malfunction. High pressure protection Stop due to detection by the thermistor of condenser (subject to all applicable models) function Actuating temperature: 65°C or more Stop due to detection by the high pressure switch (only on -C models) Protection Actuating pressure: 4.1MPa control When an abnormal inverter fin temperature is detected, used to stop only the compressor due to malfunction. Inverter protection function Actuating temperature: 95°C (AKZ(J)148 to 568) 120°C (AKZ(J)908)

65

6 Functions

3 List of Malfunctions/Warnings

When a malfunction or warning occurs while in operation, the equipment will stop operation in progress and the status will be displayed. 1. In order to protect functional parts, the compressor, oil pump, fan, or else stops. 2. In order to alert the customer to the malfunction or warning, it is displayed by code or lamp. No.

Malfunction level Compressor

ON/OFF

Display

Oil pump

Fan

Resetting procedure

1

Level 1

OFF

OFF

OFF

Manual resetting

2

Level 2

OFF

ON

ON

Manual resetting

OFF

ON

ON

Automatic resetting

ON

ON

ON

—

3 Level 3 4

5

—

OFF

ON

ON

Automatic resetting

Display Display by malfunction code

Display by warning

No display

Malfunction lamp

Subject

Blink

Malfunction code (A6 to UJ) For details, refer to page 70.

ON OFF OFF

OFF

Warning (1E to 5E) For details, refer to page 61. qLow room temperature protection (*1) wLow oil temperature protection (*2)

*1: When the room temperature thermistor detects a temperature of -2°C or less, this protection will be activated. *2: When the inlet oil temperature thermistor detects a temperature of 2°C or less, this protection will be activated.

66

7 Troubleshooting

1 Troubleshooting According to Symptoms

If an operation shows an abnormality even through no malfunction code is displayed, refer to the following information to take measures. Item

1

2

Symptom

Cause

Measure

T h e u n i t p e r fo r m s n o operation. (The POWER qMain power not supplied or power supply Supply power to the power supply terminals (R, S, lamp on the operation wires (L1 and L2) disconnected. and T) on the main PC board (A1P). panel does not turn ON.) qRemote control terminals (10 – 11) on the Check to be sure the connection of remote control external terminal block (X2M) in the OFF input. position. The pump does not operate. w“Operation lock mode” selected (Factory Unlock “operation lock mode” on the control panel. set to “operation lock mode”) (Refer to page 54.) qUnfastened piping on the suction side of Check the packing in the piping for condition and then the pump. refasten it if necessary.

3

wClogged suction strainer (on the main The pump operates but machine side) no oil flows. A small quantity of oil eDropped oil level in the oil tank recirculates and the pump r Relief valve activated due to large makes a loud noise. pressure loss in the oil discharge piping

• Clean the suction strainer. • If the oil in the oil tank gets foul, replace the oil. Refill the oil tank with oil.

Make the oil pipe diameter larger and the piping tCavitation caused in the pump due to large shorter. pressure loss in the oil suction piping qCompressor stop due to temperature control – – – wActivation of compressor restart protection Check to be sure the compressor starts up when the timer (30-second timer) timer completes its operative period of time.

4

The pump operates but eActivation of low oil temperature protection the compressor does not Use at an inlet oil temperature of 5°C or more. (due to inlet oil temperature of 2°C or less) operate. rActivation of low room temperature protection Use at a room temperature of 5°C or more. (due to room temperature of -2°C or less) tMode No. 9 set to 0%

Change to proper operation mode.

qObstacle present near the air suction/exhaust Remove the obstacle. opening

5

Clean the air filter.

eStepping down operation in progress due C h e ck t o s u r e t h e c a p a c i t y i n t h e o p e ra t i n g to high room temperature Both the pump and temperature range with the catalog and then select a compressor operate but model having a proper capacity. rToo large heat load oil does not become cool. Change the setting to a proper temperature. tToo high set temperature yShortage of refrigerant gas if exhaust temperature is approximately equal to Recharge refrigerant. the room temperature, even though the compressor is in operation. qIf “– – –” is displayed in the DATA block, the thermistor used for operation mode Correct the connection of the thermistor. concerned is not connected.

6

7

No operation settings can wIf “– – –” is displayed for just a moment be made. when the button (i.e., rightmost Set the mishandling prevention switch (SW1) on the switch) is pressed, mishandling prevention main PC board to OFF. switch (SW1) is set to ON. Malfunction signals are output from ter minals qThe procedure for signal output when a 64–65 on the exter nal malfunction occurs is different from that of terminal block in a Models 5 and 6. manner different from the conventional one.

The procedure is different from that for models AKS5 and AKZ6. Referring to information in “Parameter setting mode” on page 55, make proper settings.

67

Troubleshooting

wDirty air filter

7 Troubleshooting

2 Equipment Data checking Procedure

Using the control panel to put the system into “special monitor mode” will acquire a variety of data on the current equipment.

[Operation procedure] ��

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While in normal mode (with the NORMAL lamp ON), press and hold the and buttons for a period of two seconds, the NORMAL lamp will start blinking to shift to special monitor mode.

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Pressing the or button will make it possible to change data No. (display in the MODE block). Furthermore, pressing the button while in special monitor mode will return the system to normal mode.

Display item of special monitor mode Data No. 0 1 2 3 4 5 6 7 8 9 A B C D E F

Item [Current] Command frequency controlled by compressor inverter (rps) [Current] EV valve opening (pulse) [Current] Main circuit voltage (V) [Current] Primary current of main circuit (A) [Current] Inverter radiation fin temperature (°C) [Current] Control box temperature (°C) [Current] Discharge gas temperature (°C) [Current] Condenser saturated temperature (°C) [Current] EV valve outlet temperature (°C) [Current] DC fan revolutions (10 rpm) Power supply frequency detected (Hz) — (used for technical test) * — (used for technical test) * — (used for technical test) * Control software Ver. Inverter software Ver.

*: Since the data is used for technical test, do not change the setting on site.

68

Troubleshooting

3 Troubleshooting According to Malfunction Codes

Using the control panel to put the system into “service monitor mode” will make it possible to check the history of malfunction codes and data when a malfunction occurs.

3-1. Control Panel Operation Procedure ��

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While in normal mode (with the NORMAL lamp ON), press and hold the button for a period of two seconds, the MONITOR lamp will start blinking to shift to service monitor mode.

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Pressing the or button will make it possible to change data No. (display in the MODE block). Furthermore, pressing the button while in service monitor mode will return the system to normal mode.

69

Troubleshooting

Display item of special monitor mode Data No. Item 0 Malfunction code 0 (latest) 1 Malfunction code 1 2 Malfunction code 2 3 Malfunction code 3 4 Malfunction code 4 5 Malfunction code 5 6 Malfunction code 6 7 Malfunction code 7 8 Malfunction code 8 9 Malfunction code 9 (oldest) A [When a malfunction occurs] Machine body temperature [Th-5] (°C) B [When a malfunction occurs] Outlet oil temperature [Th-2] (°C) ------ Not displayed on AKZJ C [When a malfunction occurs] Room temperature [Th-3] (°C) [When a malfunction occurs] Inlet oil temperature [Th-4] (°C) -------D Liquid temperature in the oil tank [Th-4] displayed on AKZJ (°C) E [When a malfunction occurs] Discharge gas temperature [Th-8] (°C) F [When a malfunction occurs] Condenser saturated temperature [Th-7] (°C) H [When a malfunction occurs] EV valve outlet temperature [Th-6] (°C) J [When a malfunction occurs] Inverter frequency command (rps) L [When a malfunction occurs] EV valve opening (pulse) P [When a malfunction occurs] Main circuit voltage (V) U [When a malfunction occurs] Main circuit current (A) Y [When a malfunction occurs] Cumulative compressor operating time (minute) — Malfunction reset (Note 1) (Note 1) Normally, ‘0’ is displayed. Setting this value to ‘77’ makes it possible to reset the control CPU. (Basically, it is recommended to clear the alarm through turning the power supply to the Oil Cooling Unit OFF and then ON. Use this function only if the power supply to the Oil Cooling Unit cannot be turned OFF individually.

7 Troubleshooting 3-2. List of Malfunction Codes Malfunction Malfunction code level

A6

2

Malfunction DC fan stop

AA

2

Malfunction due to overheated heater

E1

1

System malfunction

E3

2

Malfunction due to high pressure or condenser temperature

Malfunction decision condition

Troubleshooting Flow Chart (Reference page)

Actual fan revolution falls below 10 rpm while in fan revolution.

71

For AKZ Series, the overheat prevention temperature switch reaches a temperature of 70°C. For AKZJ Series, the boil-dry prevention thermostat reaches a temperature of 105°C. Compressor ID No. (PC board jumper setting) ≠ Parameter horsepower setting The condenser temperature of 65°C or more continues for a period of 10 seconds.

72 73 74

High pressure exceeds 4.2 MPa (only for -C models).

E5

2

Malfunction due to discharge gas temperature or overheated compressor

The discharge gas temperature exceeds A for a period of 10 seconds (*1). The compressor head temperature exceeds 115°C.

E6

2

Compressor lock at startup

E9

2

Malfunction of electronic expansion valve

The compressor revolutions are not detected at startup. The malfunction is detected according to the EV valve opening and EV valve outlet temperature.

EH

1

EJ

1

FE

1

FH

2

H1

2

J3

2

Actuation of pump overcurrent relay or The pump current exceeds B (*2). actuation of agitator inner thermostat The pressure reaches 0.03 MPa (for -H units up to AKZ438/AKZJ458). Actuation of boil-dry prevention switch of The flow rate reaches 15 L/minute (for -H units up to AKZ568/AKZJ568). actuation of optional safety devices The safety device connected to X2M 12-13 activates. (Short-circuit) Malfunction due to oil pressure (rise in The pump outlet temperature exceeds 65°C. pump outlet temperature) Rise in oil inlet temperature or rise in tank The oil inlet temperature exceeds 60°C for a period of liquid temperature consecutive 60 seconds. Malfunction of room temperature thermistor or The thermistor makes a short circuit or contains a broken wire. malfunction of machine body synchronization thermistor Malfunction of discharge gas temperature thermistor The thermistor makes a short circuit or contains a broken wire.

J5

2

Malfunction of EV valve outlet temperature thermistor The thermistor makes a short circuit or contains a broken wire.

82

75 76 77 78 79 80 81 82 82

J6

2

Malfunction of condenser temperature thermistor The thermistor makes a short circuit or contains a broken wire.

82

JE

2

82

JH

2

Malfunction of pump outlet temperature thermistor The thermistor makes a short circuit or contains a broken wire. Malfunction of outlet oil temperature thermistor The thermistor makes a short circuit or contains a broken wire. or malfunction of inlet oil temperature thermistor

L0

2

Malfunction of inverter/compressor

Any of the malfunction codes L4, L5, L8, L9, and LA is displayed.

83

L4

2

Rise in radiation fin temperature

The temperature rises to 95°C (up to 568 class) or 120°C (on 908 class).

84

L5

2

Instantaneous overcurrent of power transistor The output overcurrent is input in the microcomputer.

85

L8

2

Compressor overload

The compressor output revolutions reach an abnormal level.

86

L9

2

Faulty compressor startup

The compressor does not smoothly rotate at startup.

87

LA

2

88

LC

2

Malfunction of power transistor The microcomputer detects the malfunction of power transistor. Malfunction of transmission between The transmission between the inverter microcomputer and inverter CPU and temperature control CPU the temperature control microcomputer malfunctions.

P3

2

Malfunction of control box thermistor

The thermistor makes a short circuit or contains a broken wire.

82

P4

2

Malfunction of fin temperature thermistor

The thermistor makes a short circuit or contains a broken wire.

82

qCommand capacity ≥ 95% Shortage of refrigerant wCondenser temperature - EV valve outlet temperature ≤ 5°C qand w continues for a period of three minutes. Reverse phase/open phase of power supply Reverse phase or open phase is detected in the power or wire broken in fuse supply circuit. Malfunction due to power supply voltage The power supply voltage drops below 170 V. While in pair operation of master and slave units, data Malfunction of transmission with slave unit transmission with other system malfunctions.

82

89

U0

2

U1

1

U2

2

U9

2

UH

2

System-related failure

EEPROM causes a failure.

94

UJ

2

Actuation of external safety device

A short circuit occurs between the terminals of CN2 on the main PC board.

95

Malfunction level 1 ... Pump OFF + Compressor OFF + Fan OFF Malfunction level 2 ... Pump ON + Compressor OFF + Fan ON *1: 117°C: AKZ148/328 and AKZJ188/358 120°C: All models other than those shown left. *2: 2.5 A: AKZ148 to 438 3.6 A: AKZ568/908

70

90 91 92 93

Troubleshooting

3-3. Troubleshooting Flow Chart Control panel display

A6

1

DC Fan Stop

Applicable Models

AKZ148 AKZ328 AKZ438 AKZJ188 AKZJ358 AKZJ458

2

5

Troubleshooting Diagnosis

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Countermeasures

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Methods of Malfunction Detection

Use revolutions detected with a hall IC built in the fan motor.

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3

Malfunction Decision Conditions

When the fan revolution falls below 10 rpm.

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    

Supposed Causes

Faulty connector connection Faulty main PC board Faulty fan motor Surge in power supply Noise from power supply circuit

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Troubleshooting

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71

7 Troubleshooting Control panel display

AA

1

Malfunction due to Overheated Heater

Applicable Models

AKZ**8-H AKZJ**8-H (All models equipped with heater)

2


AKZ**8-H: Detect by superheat prevention temperature switch (S4B1)  AKZJ**8-H Detected by boil-dry prevention thermostat (S4B1 or S4B2) 

3


AKZ**8-H: When the overheat prevention temperature switch is actuated. Actuating temperature: 70°C  AKZJ**8-H: When the boil-dry prevention temperature switch is actuated. Actuating temperature: 105°C (Resetting temperature: 99°C) 

4

Supposed Causes

Inadequate oil quantity refilled Inadequate oil flow rate  Faulty wiring of pump  Faulty magnetic contactor  Stains adhering around heater (only on AKZJ**8-H)  

5


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Countermeasures

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72

Troubleshooting

Control panel display

EI

1

Malfunction of System

Applicable Models

AKZ**8 AKZJ**8

5

Troubleshooting Diagnosis ��

2

Countermeasures ��


Check with microcomputer whether or not E2PROM is normal.

3


When the combination of PC board and compressor is not normal.

4

Troubleshooting



Supposed Causes

Improper spare PC board used for servicing

73


E3

1

Malfunction due to High Pressure or Condenser Temperature

Applicable Models

1. Malfunction due to condenser temperature AKZ**8 (All series including -C models) AKZJ**8 (All series including -C models) 2. Malfunction due to high pressure AKZ**8-C AKZJ**8-C

2


1. Detect with the condenser temperature thermistor to be located in the middle of the condenser. 2. Detect the presence/absence of continuity with the high pressure switch to be located in the discharge pipe.

3


1. When the condenser temperature thermistor detects a temperature in excess of 65°C. 2. When the high pressure switch is actuated. Actuating pressure: 4.1 MPa (Resetting pressure: 3.2 MPa)

4         

74

Supposed Causes

Shield present around the equipment Dirty air filter Room temperature too high Oil inlet temperature too high Faulty condenser temperature thermistor Faulty high pressure switch Dirty or clogged condenser Faulty fan Short circuit of fan air quantity

5


Countermeasures

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Troubleshooting


E5

1

Malfunction due to Discharge Gas Temperature or Overheated Compressor

Applicable Models

5


1. Malfunction due to discharge gas temperature AKZ**8 (All series including -C models) AKZJ**8 (All series including -C models) 2. Malfunction due to overheated compressor AKZ**8-C AKZJ**8-C


1. Detect with the discharge gas temperature thermistor. 2. Detect the compressor protection thermostat.

3


4           

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Troubleshooting

1. When the discharge gas temperature thermistor detects a temperature of the following.  AKZ(J)148 to 358: 117°C  AKZ(J)438 to 908: 120°C 2. When the compressor protection thermostat is actuated. Actuating temperature: 115°C Resetting temperature: 85°C

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Countermeasures

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Supposed Causes

Shield present around the equipment Dirty air filter Room temperature too high Oil inlet temperature too high Fa u l t y d i s c h a r g e g a s temperature thermistor Faulty compressor protection thermostat Inadequate refrigerant quantity (including slow leakage) Heat generated due to worn compressor shaft Faulty EV valve Dirty or clogged condenser Short circuit

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75


E6

1

Compressor Lock at Startup

Applicable Models

AKZ**8 (All series) AKZJ**8 (All series)

5

Troubleshooting Diagnosis Replace the compressor.

2


Detect according to compressor revolutions at startup.

3


When the compressor revolutions are not detected.

4 

76

Supposed Causes

Compressor locked

Countermeasures

Troubleshooting


E9

1

Malfunction of Electronic Expansion Valve

Applicable Models


5


Countermeasures

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Detect the malfunction according to the EV valve opening and outlet temperature.

3

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When the EV valve outlet temperature does not rise to an adequate level even through the EV valve opening is increased.  When the EV valve outlet temperature does not fall to an adequate level even though the EV valve opening is decreased.

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Supposed Causes

Faulty EV valve coil Faulty main PC board  Faulty mounting of EV valve coil  Inadequate oil level 

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77

Troubleshooting

4

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EH

1

Actuation of Pump Overcurrent Relay or Agitator Inner Thermostat

Applicable Models

5



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2


qFor AKZ**8: Detect with the pump motor overcurrent relay (F1M). wFor AKZJ**8: Detect with the agitator inner thermostat (S1B).

3

Supposed Causes

qFor AKZ series:  Erroneous pump wiring  Defective oil piping by customer  Faulty oil pump  Incompatible viscosity of oil used wFor AKZJ series  Erroneous agitator wirings  Faulty agitator motor

78

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Countermeasures

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Troubleshooting


EJ

1

Actuation of Boil-dry Prevention Switch or Optional Safety devices

Applicable Models

qAKZ148- to 438-H wAKZ568- and 908-H eModels other than AKZ**8-H and with optional safety equipment mounted

2


qAKZ148- to 438-H: Detect with the boil-dry prevention pressure switch (S5P). wAKZ568- and 908-H Detect with the boil-dry prevention flow switch (S4PH). eModels other than AKZ**8-H: Detect with the optional safety devices.

3


4

Supposed Causes

Faulty main PC board High path resistance of oil piping  Faulty boil-dry prevention pressure switch  Faulty boil-dry prevention flow switch  High viscosity of oil used  


Countermeasures

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Troubleshooting

qAKZ148- to -438H: Actuating (open) pressure: 0.03 MPa wAKZ568- and 908-H: Actuating (open) flow rate: 15 L/minute eModels other than AKZ**8-H: Actuating (open) pressure of the optional safety devices.

5

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79


FE

1

Malfunction due to oil Pressure (Rise in Pump Outlet Temperature)

Applicable Models

AKZ148 to 568

5


2

Countermeasures

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Detect the malfunction with the pump outlet temperature thermistor (Th-10).

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When the pump outlet temperature exceeds 65°C.

4

Supposed Causes

Closed oil piping system Large pressure loss in oil piping system  Faulty main PC board  

80

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Troubleshooting


FH

1

Rise in Oil Inlet Temperature or Tank Liquid Temperature

Applicable Models

5



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qAKZ**8: Detect with the inlet oil temperature thermistor (Th-4). wAKZJ**8 Detect with the liquid temperature thermistor (Th-4).

3

Countermeasures


When the inlet oil temperature or the liquid temperature in the tank exceeds 60°C.

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Faulty inlet oil temperature thermistor Improper model selection Dirty air filter Improper operation mode Defective oil piping Faulty main PC board

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Troubleshooting

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Supposed Causes

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81


HI,J3,J5,J6, JE,JH,P3,P4

1

Malfunction of Thermistors

Applicable Models

5



Countermeasures

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2


Detect malfunction according to resistance detected with thermistor.

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When the thermistor contains a broken wire or short-circuited.

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Supposed Causes

Faulty thermistor  Faulty main PC board  Faulty thermistor connection

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82

Troubleshooting


LO

1

Malfunction of Inverter/Compressor

Applicable Models


5


Countermeasures

Any of the following malfunctions has occurred.

2


�� : Rise in radiation fin temperature �� : Instantaneous overcurrent of power transistor �� : Compressor overloaded �� : Faulty compressor startup �� : Malfunction of power transistor

While in service monitor mode (refer to page 69), check to be sure the malfunction code and then take measures according to the applicable “Troubleshooting flow chart”.

3


4

Supposed Causes Troubleshooting

83


L4

1

Rise in Radiation Fin Temperature

Applicable Models


5


Countermeasures

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2


Detect with the fin temperature ther mistor mounted on the radiation fin.

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3


When the temperature detected with the fin temperature thermistor exceeds any of the following values.  AKZ(J)148 to 568: 95°C  AKZ(J)980: 120° (Retry: 10 times)

4

Supposed Causes

Faulty main PC board  Blocked ventilation opening  Dirty radiation fin  Ambient temperature too high 

84

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Troubleshooting


L5

1

Instantaneous Overcurrent of Power Transistor

Applicable Models

AKZ568 and 908 AKZJ568 and 908

5


Countermeasures

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2


Detect according to current passing through the power transistor.

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When the output overcurrent is input from the output overcurrent detection circuit to the microcomputer.

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(Retry: 10 times)

4

Supposed Causes

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85

Troubleshooting

Faulty compressor coil Overcurrent due to the stall of compressor  Faulty power transistor  Noise to power supply line 

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L8

1

Compressor Overloaded

Applicable Models


2


Detect according to the output revolutions of the compressor.

5


Countermeasures

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qWhen the revolutions are not output wWhen the revolutions reach 1/2 of the target revolutions eWhen the revolutions detected are too fast (Retry: 10 times)

4    

 

Supposed Causes

Compressor overloaded Compressor mechanically locked Faulty main PC board Faulty power supply voltage (e.g. instantaneous power failure or slow-down of voltage Noises present in the power supply line Lightning surge

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86

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Troubleshooting


L9

1

Faulty Compressor Startup

Applicable Models


5


2

Countermeasures

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Detect according to the compressor revolutions at startup.

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When the compressor does not rotate smoothly. (Retry: 10 times)

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Supposed Causes

Troubleshooting

Faulty pressure equalization Faulty compressor wire connections  Faulty compressor (incomplete lock)  Faulty main PC board  Faulty EV valve

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87


LA

1

Instantaneous Overcurrent of Power Transistor

Applicable Models


5


Countermeasures

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2


Detect according to current passing through the power transistor.

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When the output overcurrent is input from the output overcurrent detection circuit to the microcomputer.

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(Retry: 10 times)

4

Supposed Causes

Faulty compressor coil Overcurrent due to the stall of compressor  Faulty power transistor  Noise to power supply line  

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88

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Troubleshooting


LC

1

Malfunction of Transmission between Inverter CPU and Temperature Control CPU

Applicable Models


5


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(Retry: 20 times)

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When the transmission is not performed normally for a period of given time or more.

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Check communication conditions between the inverter microcomputer and the temperature control microcomputer

3

Countermeasures

Faulty main PC board External noises or else

89


U0

1

Shortage of Refrigerant

Applicable Models


5


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2


Detect the condenser temperature and the EV valve outlet temperature and make judgment of refrigerant quantity.

3 


When q and w continue for a period of 180 seconds. qCommand capacity ≥ 95% wCondenser temperature – EV valve outlet temperature ≤ 5°C

4

Supposed Causes

Shortage of refrigerant Clogged refrigerant piping  Moisture choke  Broken piping  

90

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Countermeasures

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Troubleshooting


UI

1

Reverse Phase/Open Phase of Power Supply or Broken Wire in Fuse

Applicable Models

5



Countermeasures

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2


Detect each phase in power supply phase detection circuit.

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qWhen reverse phase or open phase is detected in the power supply line. wWhen any wire in the fuses [FU1 to FU3] used in the pump motor (on the AKZ series) or the agitator motor ( o n t he A K Z J s er ie s ) is broken.

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Troubleshooting

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Supposed Causes

Reverse phase in power supply line Open phase in power supply line Faulty main PC board Overloaded operation of oil pump Short circuit or poor insulation of oil pump coil Short circuit or poor insulation of agitator coil Noises in power supply line

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91


U2

1

Malfunction due to Power Supply Voltage

Applicable Models


5


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2


Detect according to voltages of the inverter power supply DC unit.

3

Supposed Causes

Inadequate power supply voltage  Instantaneous power failure  Faulty main PC board 

92

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1. When an instantaneous power failure occurs. 2. When the power supply voltage drops below the rating × 90%.

4

Countermeasures

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U9

1

Malfunction of Transmission with Slave Unit

Applicable Models

Master unit side of model using the communication PC board (option)

2


When the transmission between the master unit and the slave unit is not performed normally for a period of given time or more.

4


Countermeasures

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Check with the microcomputer whether or not the transmission with the slave unit is normally performed.

3

5

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Faulty main PC board Faulty connection in the transmission line  Faulty communication PC board  External noises or else  

93


UH

1

System-related failure

Applicable Models


5

Troubleshooting Diagnosis Replace the main PC board.

2


Check with the microcomputer whether or not E2PROM is normal.

3


When the E2PROM causes a failure.

4  

94

Supposed Causes

Faulty main PC board External noises or else

Countermeasures (For replacement procedure, refer to page 112.)

Troubleshooting


UJ

1

Actuation of External Safety Device

Applicable Models

AKZ**8 or AKZJ**8, which are connected to an external safety device, respectively

2

5


Countermeasures

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Detect open or short circuit between terminals through the CN2 terminal on the main PC board.

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When the circuit between the CN2 terminals becomes open.

4

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Actuation of external safety device  Faulty main PC board  Without mounting the external safety device, parameter setting mode is enabled. (Set to any bit other than “0” with parameter No.3. 

95

8 Removing Procedure 1 AKZ148 to 908

Procedure for Removing of Outside Panel Block

WARNING Before removing work, be sure to turn OFF all power supplies.

Work Procedure q Unscrew the two screws that hold the front panel

Point

[AKZ148 to 438] Top panel

and then remove it. w Unfasten the screws to rotate the air thermistor

Air thermistor retainer

retainer upward. e Unscrew the four screws that hold the top panel and then remove it. r Pull out the air filter downward.

Right side panel

Left side panel

t Unscrew the eight screws that hold the left side panel and then lift this panel. y Unscrew the eight screws that hold the right side panel to slide this panel upward and then pull out it

Air filter Front panel

sideward. q Unscrew the two screws that hold the front panel

[AKZ568 and 908] Top panel


Switch box (lid)

retainer upward.


e Unscrew the five screws that hold the top panel and then remove it. r Unscrew the two screws that hold the switch box (lid) and then remove it. t Pull out the air filter downward. y Unscrew the 10 screws that hold the left side panel and then lift this panel. u Unscrew the 12 screws that hold the right side panel to slide this panel upward and then pull out it sideward. 96


Removing Procedure

Procedure for Removing of Propeller Fan/Fan Motor


Work Procedure

Point

[AKZ148 to 438]  Following the Procedure for Removing of Outside Panel Block, remove the top panel, left side

Bell mouth mounting plate Motor base

panel, and right side panel.

Fan motor Propeller fan

q Pull out the fan motor connector from the main PC board. w Unscrew the two screws that hold the bell mouth mounting plate fixing the fan motor to remove this plate and then

Washer-based nut

pull out it to the front. e Remove the washer-based nut that hold the propeller fan and then remove the fan.

Bell mouth mounting plate fixing screws

r Unscrew the four screws that hold the fan motor and then remove it. q Pull out the fan motor connector from the inverter PC board. w Unscrew the two screws that hold the fan guide fixing the fan motor to

[AKZ568 and 908]

Propeller fan Hexagon socket head screw

Fan guide

remove this guide and Fan motor

Removing Procedure

then pull out it to the front. e Use a hexagonal wrench to remove the propeller fan. r Unscrew the four screws that hold the fan motor

Fan guide fixing screw

and then remove it.

97

8 Removing Procedure Procedure for Removing of Switch Box


Work Procedure  Following the Procedure for Removing of Outside Panel Block, remove the

[AKZ148 to 438] Fixing screw

Point Electrical component assembly Fixing screw

to information in “Main

and right side panel.

PC board replacement procedure” (on page 112).

q Remove each harness from the electrical component assembly. w Unscrew the two fixing screws that hold the electrical component assembly and then slide this assembly to the left to remove it.

component assembly. w Unscrew the two fixing screws that hold the electrical component assembly and then slide this assembly to the left to remove it.

98

assembly, replace the setting data referring

top panel, left side panel,

q Remove all harnesses from the electrical

 In order to replace the electrical component

[AKZ568 and 908]

Electrical component assembly Fixing screw

Fixing screw


Procedure for Removing of PC Board (AKZ148 to 438)


Work Procedure

Point

 Following the Procedure for Removing of Outside Panel Block, remove the top panel.

1. R e m o ve t h e c o n t r o l panel.

q Disconnect the lead wire connector (CN1) and then

CN1

pull out the lead wire. w Push the two stoppers that hold the control panel and then remove the control panel.  In order to replace the main PC board, replace

2. Remove the main PC

Hook

board

to information in “Main PC board replacement

q Disconnect all harnesses from the main PC board. w Unscrew the four screws that hold the radiation fin

the setting data referring

procedure” (on page 112). Main PC board

and also one vibration isolating screw. e Unhook the four hooks that hold the main PC Hook

Removing Procedure

board and remove this PC board while peeling off the radiation fin.

99

8 Removing Procedure Procedure for Removing of PC Board (AKZ568 and 908)


Work Procedure

Point

 Following the Procedure for Removing of Outside Panel Block, remove the top panel.

1. R e m o ve t h e c o n t r o l panel.


CN1

pull out the lead wire. w Push the two stoppers that hold the control panel and then remove the control panel.  In order to replace the main PC board, replace



board

q Disconnect all harnesses from the main PC board. w Unscrew the four screws that hold the radiation fin and also one vibration isolating screw. e Unhook the four hooks that hold the main PC board and remove this PC board while peeling off the radiation fin.

100

to information in “Main Hook


Inverter PC board

CAUTION The inverter PC board cannot

Main PC board

be removed individually. Be sure to replace it by the set of

Hook

electrical component assembly.


Procedure for Removing Oil Pump


Work Procedure  Following the Procedure for Removing of Outside

Point  When the hose band on the oilpump outlet is

[AKZ148 to 438]

unfastened, the large

Panel Block, remove the

amount (approx. 1 liter) of

top panel, left side panel,

oil flows out.

and right side panel.

Provide a contaimer to

 Provide a container to receive oil under the

receive it.

Evaporator

evaporator. Oil inlet thermistor

q Unscrew the cone screw that holds the oil inlet

Inlet socket Container

thermistor. w Unscrew the four screws that hold the inlet socket.

Oil pump (Inlet side)

e Unfasten the hose clamp at the oil pump outlet. r Unscrew the four screws that hold the pump motor

Hose clamp (Outlet side)

base. t Remove the oil pump while pulling out the inlet

[AKZ908]

and outlet hoses.

Evaporator Removing Procedure

Oil inlet thermistor Inlet socket Container Oil pump

(Inlet side) (Outlet side)

Hose clamp

101

8 Removing Procedure Procedure for Removing of EV Valve / High Pressure Switch


Work Procedure

Point  Before removing work, be sure to recover the

 Following the Procedure for Removing of Outside

refrigerant.

Panel Block, remove the top panel, left side panel, and right side panel.

EV valve coil

Strainer

 In order to replace the EV valve main unit, perform the “pulse

Remove the EV valve. q Recover the refrigerant through the service port.

EV valve main unit Brazed sections

detection operation with the EV valve fully closed” referring to the “Replacement procedure”

w Pull out the EV valve coil upward.


e Remove the EV valve outlet thermistor.

Thermistor fixing spring

r Disconnect the two brazed sections that hold the EV

(on page 113).  When mounting the EV valve main unit, mount the strainer without fail. (For the mounting direction, refer to Figure

valve main unit and then

on the left.)

remove it.

Remove the high pressure switch.

 Since the service port is provided with a check

q Use two spanners to remove the high pressure

valve, the high pressure

switch.

switch can be removed without discharging the refrigerant. Service port ��

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102


Procedure for Removing of Compressor


Work Procedure

Point  Before Removing work, be sure to recover the

 Following the Procedure for Removing of Outside Panel Block, remove the

Brazed sections

refrigerant.

top panel, left side panel, and right side panel. q Recover the refrigerant through the service port. w Disconnect the lead wire from the compressor terminal.

Compressor lead wire

e Unscrew the three nuts that hold the compressor. r Disconnect the two brazed sections that hold the compressor and then remove it. Compressor mounting nut

Compressor terminal symbol U(Red) V

(Yellow)

N

(Brown)

W(Blue)

Removing Procedure

103

8 Removing Procedure 2 AKZJ188 to 908

Procedure for Removing of Outside Panel Block


Work Procedure q Unscrew the two screws that hold the front panel

[AKZJ188 to 458]

Point Top panel



retainer upward. e Unscrew the four screws that hold the top panel and then remove it. r Pull out the air filter downward.

Right side panel

Left side panel

t Unscrew the eight screws that hold the left side panel and then lift this panel. y Unscrew the eight screws that hold the right side panel to slide this panel


upward and then pull out it sideward. q Unscrew the two screws that hold the front panel

[AKZJ568 and 908]


Switch box (lid)

retainer upward.


e Unscrew the five screws that hold the top panel and then remove it. r Unscrew the two screws that hold the switch box (lid) and then remove it. t Pull out the air filter downward. y Unscrew the 10 screws that hold the left side panel and then lift this panel. u Unscrew the 12 screws that hold the right side panel to slide this panel upward and then pull out it sideward. 104

Top panel



Procedure for Removing of Propeller Fan/Fan Motor Work Procedure  Following the Procedure


Point

[AKZJ188 to 458]

for Removing of Outside Panel Block, remove the top panel, left side panel,

Bell mouth mounting plate

Propeller fan

and right side panel. q Pull out the fan motor connector from the main

Motor base

Washerbased nut

Fan motor

PC board. w Unscrew the two screws that hold the bell mouth mounting plate fixing the fan motor to remove this plate and then pull out it to the front. e Remove the washer-based nut that

Bell mouth mounting plate fixing screws

hold the propeller fan and then remove the fan. r Unscrew the four screws that hold the fan motor and then remove it.

q Pull out the fan motor connector from the inverter

[AKZJ568 and 908]

PC board.

the fan motor to remove this guide and then pull out

�� Removing Procedure

w Unscrew the two screws that hold the fan guide fixing

��

it to the front. e Use a hexagonal wrench to remove the propeller fan.

��

r Unscrew the four screws that hold the fan motor and then remove it.

��

105

8 Removing Procedure Procedure for Removing of Switch Box


Work Procedure  Following the Procedure

for Removing of Outside Panel Block, remove the

Point

[AKZJ188 to 458] Fixing screw Fixing screw

assembly, replace the setting data referring

top panel, left side panel, and right side panel.

Electrical component assembly

q Remove each harness from the electrical component assembly. w Unscrew the two fixing screws that hold the electrical component assembly and then slide this assembly to the left to remove it.

q Remove all harnesses from the electrical

[AKZJ568 and 908]

Fixing screw

Fixing screw

component assembly. w Unscrew the two fixing screws that hold the electrical component assembly and then slide this assembly to the left to remove it.

106

 In order to replace the electrical component

Electrical component assembly

to information in “Main PC board replacement procedure” (on page 112).


Procedure for Removing of PC Board (AKZJ188 to 458)


Work Procedure

Point

 Following the Procedure

for Removing of Outside Panel Block, remove the top panel.

1. R e m o ve t h e c o n t r o l

 In order to replace the main PC board, replace

panel. CN1


the setting data referring to information in “Main

pull out the lead wire.

Control panel

w Push the two stoppers that hold the control panel and


then remove the control panel.


Hook

board.

q Disconnect all harnesses from the main PC board. w Unscrew the four screws that hold the radiation fin

Main PC board

and also one vibration isolating screw. e Unhook the four hooks that hold the main PC

Hook

Removing Procedure

board and remove this PC board while peeling off the radiation fin.

107

8 Removing Procedure Procedure for Removing of PC Board (AKZJ568 and 908)


Work Procedure

Point


for Removing of Outside Panel Block, remove the top panel.

1. R e m o ve t h e c o n t r o l panel. CN1

q Disconnect the lead wire connector (CN1) and then pull out the lead wire.

Control panel

w Push the two stoppers that hold the control panel and then remove the control panel.  In order to replace the main PC board, replace



board.

q Disconnect all harnesses from the main PC board. w Unscrew the four screws that hold the radiation fin. e Unhook the four hooks that hold the main PC board and remove this PC board while peeling off the radiation fin.

108

Hook

to information in “Main PC board replacement procedure” (on page 112).

Inverter PC board

CAUTION

Main PC board

The inverter PC board cannot be removed individually. Be

Hook

sure to replace it by the set of electrical component assembly.


Procedure for Removing of EV Valve / High Pressure Switch


Work Procedure



for Removing of Outside

refrigerant.

Panel Block, remove the top panel, left side panel, and right side panel.

Strainer

EV valve coil

 In order to replace the EV valve main unit, perform the “pulse

Remove the EV valve. q Recover the refrigerant through the service port.

EV valve main unit Brazed sections

detection operation with the EV valve fully closed” referring to the “Replacement procedure”

w Pull out the EV valve coil upward.


e Remove the EV valve outlet thermistor.

Thermistor fixing spring

r Disconnect the two brazed sections that hold the EV

(on page 113).  When mounting the EV valve main unit, mount the strainer without fail. (For the mounting direction, refer to Figure

valve main unit and then

on the left.)

remove it.

Remove the high pressure switch.  Since the service port is provided with a check

q Use two spanners to remove the high pressure

valve, the high pressure

switch.

switch can be removed without discharging the Service port

refrigerant. Removing Procedure


109

8 Removing Procedure Procedure for Removing of Compressor


Work Procedure



for Removing of Outside

Brazed sections

Panel Block, remove the top panel, left side panel, and right side panel. q Recover the refrigerant through the service port.

Compressor lead wire

w Disconnect the lead wire from the compressor terminal. e Unscrew the three nuts that hold the compressor. r Disconnect the two brazed sections that hold the compressor and then remove it. Compressor mounting nut

Compressor terminal symbol U(Red) V

(Yellow)

N (Brown)

W(Blue)

110

refrigerant.


Procedure for Removing of Agitator Motor / Evaporator


Work Procedure  Following the Procedure

Point

[AKZJ188 to 458]

for Removing of Outside Panel Block, remove the top panel, left side panel, and right side panel.

Agitator motor

Remove the agitator motor. q Disconnect the motor connector. w Unscrew the one screw that holds the agitator

Brazed sections Agitator plate

plate and then remove it. e Unscrew the four external screws that hold the agitator motor and then

Legs Evaporator

remove it.

Remove the evaporator.

[AKZJ568 and 908]

q Place the equipment on the worktable. w Discharge the refrigerant through the service port. e Remove the two legs from the bottom frame.

*1: Four brazed sections on J568 and J908 models. t Pull the evaporator downward to remove it.

Removing Procedure

r Disconnect the two brazed sections (*1).

Agitator motor

Brazed sections Legs

Agitator plate

Evaporator

111

9 Replacement Procedure

1 Procedure for Replacing Main PC Board

For the replacement of the main PC board, check to be sure the model name of the main unit of Oil Cooling Unit corresponds to the applicable model of the PC board and then following the procedure shown below.

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Replacement Procedure

2 Procedure for Replacing EV Valve Main Unit

In order to replace the EV valve main unit, be sure to perform the pulse detection operation with the EV valve fully closed. (The reason is that the pulse to fully close the EV valve varies.) Replace the EV valve main unit according to the following procedure. (In order to only replace the EV valve coil, the detection operation is not needed to perform.)

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10 Miscellaneous Reference Data

1 Thermistor Temperature/Resistance Characteristics

Figure and Table below show the characteristics of thermistors used in this Oil Cooling Unit. In order to check the thermistors for troubleshooting, disconnect the connector to measure the resistance of the thermistor concerned and then compare the measured resistance with the characteristic value.

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Temperature (°C)

0

10

15

20

25

30

35

40

45

50

55

60

65

Resistance (kΩ)

67.33

40.38

31.69

25.08

20.00

16.07

13.01

10.60

8.69

7.17

5.95

4.97

4.17

Temperature (°C)

70

75

80

85

90

95

100

105

110

115

120

125

130

Resistance (kΩ)

3.51

2.98

2.54

2.17

1.86

1.61

1.39

1.21

1.06

0.92

0.81

0.72

0.63

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2 Refrigerant (R410A) Characteristics

Miscellaneous Reference Data

3 Procedure for Mounting Optional Parts

3-1. Machine Body Synchronization Thermistor/Optional Oil Temperature Thermistor qSymbol and intended use by type Mounting this optional part to the oil piping of the main machine makes it possible to detect and control the temperature.

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AKZ 8-OP-A10

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AKZ 8-OP-K10

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10 Miscellaneous Reference Data 3-2. Communication PC Board (Option) Mounting this communication PC board to the Oil Cooling Unit and then linking with the main machine enables the following functions. 1. Operation modes and operation settings can be changed from the main machine. 2. Malfunction codes and temperature data (i.e., machine body temperature, room temperature, inlet oil temperature, outlet oil temperature, temperature differential between inlet and outlet, and inverter frequency) can be read on the main machine side. ��

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Preface Thank you very much for usual patronage to Daikin products. We have completed and pleased to present the Oil Cooling Unit (Model 8) Service Manual. We at Daikin provide an extensive lineup of models to respond to high-accuracy temperature control and needs for energy saving with the Oil Cooling Unit and appreciate your further loyal patronage. This Service Manual includes information on troubleshooting and a variety of services. Please make use of the Service Manual for your servicing of the Oil Cooling Unit.

Name of information Oil Cooling Unit (Model 8) Service Manual

Models listed

• AKZ148 to 908 • AKZJ188 to 908

Date of issue

June 2005

June 2005 After Sales Service Division

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SiOCU05-001

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Daikin Service Manual 8

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