Installation Operation Maintenance CGAH Air Cooled Liquid Chillers SMM Configuration SMM Module for Scroll Units, H Generation
CGAH-SVX01A-EN
CGAH Air Cooled Liquid Chillers 3
Contents Foreword Warranty Acceptance of delivery General Refrigerant
Product nomenclature Installation
4 5
Unit nameplate Installation instructions Handling Water to evaporator connection Unit dimensions General unit characteristics Electrical connections Wiring diagram-Customer electric power supply
13
General start-up Preparation Starting up the unit Final checks Pressure drops
16
Operation Control and unit operation Weekly start up and week-end shutdown Start up and seasonal shutdown
17
Maintenance Maintenance instructions Troubleshooting guide Installation checklit Safety recommendations Maintenance contract Training
SMM Configuration Hardware Operation of the module
22 23
Function of the keys 0 and 1 Function of the keys keys ,, and How to reset the SMM ? Content of the meun A General information B Customer configuration C Events log and reset D Customer configuration (rest) E Information on pressures and refr igerant temperatures and optional temperatures
Explanation of the fault codes © American Standard Inc. 2001
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Contents
Please check that the unit has not in any
Foreword The aim of this document is to set out the rules for the installation, set-up. operation and maintenance of this type of Trane air cooled liquid chillers. The maintenance operations required to
way been damaged during transport, as soon as it arr ives on site. If damage is observed, or even on suspicion of damage: Carry out instructions for notification of damage in transpor t, and war n your Trane
insure that this machine operates reliabily
Agency.
throughout its full service life are not
Caution:
exhaustively described. Only the services of
Failure to conform to the above rules will
a qualified technician employed by a
result in loss of insurance coverage.
reputable service company can ensure that the machine operates durably and reliably.
General About this manual:
Warranty
"Caution" and "Warning" messages appear
Warranty is based on the general terms and
at the appropriate place throughout this
conditions of Societe Trane. The warranty is
manual. Your personal safety and the proper
void if the equipment is modified without the
operation of this machine require that you
written approval of Trane, if the operating
follow them carefully.
limits are exceeded or if the control system
Trane Taiwan assumes no liability for
or the electrical wiring is modified.
installation or servicing performed by
Damage due to misuse, lack of maintenance
unqualified personnel.
or failure to comply with the manufacturer’s instructions or recommendations is not covered by the warranty obligation.
Acceptance on delivery
Refrigerant The refrigerant provided by the constructor meets all the requirements of our units. When using recycled or reprocessed
All air-conditioning units are shipped to their
refrigerant, it is advisable to ensure its
installation site on a wooden skid.
quality is equivalent to that of a new
All machines reach final destination
refrigerant.
completely connected and assembled ready
For this, it is necessary to have a precise
for immediate start-up.
analysis made by a specialized laboratory. If this condition is not respected, the constructor warranty could be cancelled.
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Product nomenclature
CG A H 1,2
3
2
B U N M R N A
4 5,6,7 8
020
9 10 11 12 13 14 15
DIGIT 1,2,3,4 – Chiller Type CGAH=Air-cooled Chillers DIGIT 5,6,7 – Model 020 025 030 040 050 060
DIGIT 11 – Built In Water Pump N=Without (standard) R=With (Option for model 020 & 025 Cooling-Only 60Hz unit) DIGIT 12 – Main Disconnect Switch M=Without (Standard) G=With (Optional)
DIGIT 8 – Electrical Power 2=220V/60Hz/3ø 3=380V/60Hz/3ø 4=460V/60Hz/3ø 5=380V/50Hz/3ø 6=400V/50Hz/3ø 7=415V/50Hz/3ø DIGIT 9 – Design Sequence B=Second
DIGIT 13 – Operating Ambient Temperature R=Normal (standard 3-43˚C) L=Low (below 3˚C) DIGIT 14 – Options N=No options B=Blue fin condenser J=Compressor sound attenuator K=Blue fin condenser & Compressor sound attenuator DIGIT 15 – Service Sequence A=First
DIGIT 10 – Controls U=Microprocessor M=Pneumatic control (For domestic only)
© American Standard Inc. 2001
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Installation
Figure 1: Unit nameplate
Unit nameplate The unit nameplate gives the complete model reference numbers. The unit power rating is shown, and power supplies should not deviate by more than 10% from the rated power. The customer’s electrical installation must be able to withstand this current.(Figure 1)
Installation instructions Foundations No special foundations are required, provided the supporting surface is flat and level, and can withstand the weight of the unit. Anti-vibration rubber pads They are supplied as standard with the machine, and should be placed between the
Figure 2: Dimensions of recommended slings and swing-ber
supporting floor and the unit to attenuate vibrations. 4 pads for the sizes 020-030 6 pads for the sizes 040-060 Clearance Insure there is sufficient clearance around the unit to allow maintenance operations to take place without obstruction. For minimum clearance, please refer to figure 5.
Handling(Figure 2)
Dimensions of recommended slings and swing-bar: CGAH(50Hz)
020
025
030
040
050
060
A(mm)
1300 1300 1300 1300 2200 2200
B(mm)
2200 2200 2200 2200 2200 2200
MAX. WEIGHT(kg) 750
850
975 1450 1550 1750
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Water to evaporator connection Install water circulation pump upstream of the evaporator, insuring that the evaporator is under positive pressure. Tables for power supply connections and water return are shown on the certified submittals. These drawings are available on request from your Trane agency. The 1/4 coupling located on the outlet connections may be used as the draining outlet from the plate heat exchanger.
The following recommendations refer to
Caution:
Figure 3.
All installation must be equipped with
1. Pressure gauges: shows entering and
strainer provided by factory in order that
leaving water pressure. Stop valves
only clean water enters into exchangers.
should be provided on water inlets and outlets. 2. Thermometers: indicate chilled water entering and leaving temperatures. 3. Balancing valve: controls water flow. 4. Stop valves: isolate chillers and water
Insure that all chilled water pipes are fully insulated, in order to prevent frost damage. Mount heating resistors on all water pipes exposed to negative temperatures. Minimum water capacity
circuting pump during maintenance
Minimum volume of water is depending on
operations.
the type of application. Consult your Trane
5. Water strainer: avoid to get heat
Agency. If necessary a buffer tank should be
Note: Complete draining of all the
exchangers dirty. (Factory provided, field
fitted. Safety and control devices will only
installation is difficult. The use of anti-
installed)
operate correctly if there is sufficient water in
freeze liquid is recommended to protect
the system.
the heat exchanger. Water treatment Untreated or insufficiently treated water, if
Figure 3: Water to evaporator connection
used in this unit, may cause scale, slime or algae to accumulate or cause erosion and corrosion. The services of a qualified water treatment specialist are recommended to determine what treatment, if any, is advisable. Trane disclaims any liability with regard to damage arising from the use of untreated or improperly treated water, or from the use of saline or brackish water.
© American Standard Inc. 2001
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Unit dimensions CGAH-020/025/030
CGAH-040/050/060
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General Unit Characteristics 50Hz Model Compressors Circuit Capacity Steps Max Load Amps(1)
380V 400V 415V
C0mpressors Power input C0mpressors Running Current
C0mpressors Starting Current(2)
380V 400V 415V 380V 400V 415V
Rated Water Flow Evaporator Head Loss(H2O) Refrigerant Number Of Fan(s) Air Flow Rate Nominal Fan Speed Fan Motor Full Load Power input Each Fan Motor Staring Amps Each Fan Motor Full Load Amps Each Operating Weight Lenght Width Height
400V 400V
A A A kW A A A A A A L.P.M. m Type kg EA m3 /s RPM kW A A kg mm mm mm
CGAH020 10T+10T 1 2 42 40 39 16.9 30 28 27 126 133 138 145 3.6
CGAH025 10T+15T 1 2 53 50 48 21.2 40 38 37 181 190 197 187 4.0
9.6 2 7.7 700 1.0 4.5 2.8 750 2060 1020 1560
12.2 2 7.7 700 1.0 4.5 2.8 850 2060 1020 1560
CGAH020 10T+10T 1 2 84 48 42 21.9 64 37 32 297 173 136 175 3.5
CGAH025 10T+15T 1 2 106 61 53 26.3 80 46 40 452 253 191 221 4.0
9.6 2 7.7 660 0.9 7.5 5.5 3.7 4.5 2.6 2.2 750 2060 1020 1560
12.2 2 7.2 660 0.9 7.5 5.5 3.7 4.5 2.6 2.2 900 2060 1020 1560
CGAH030 CGAH040 15T+15T 2x(10T+10T) 1 2 2 4 63 84 60 80 58 77 25.0 33.8 48 60 46 56 44 54 188 154 198 163 205 167 223 306 4.1 3.6 HCFC-22 14.5 20.1 2 4 7.2 15.4 700 700 1.0 1.0 4.5 4.5 2.8 2.8 975 1450 2060 2250 1020 1890 1560 1560
CGAH050 2x(10T+15T) 2 4 105 100 96 42.4 80 76 73 217 228 237 373 4.0
CGAH060 2x(15T+15T) 2 4 126 120 116 49.9 97 92 89 232 244 253 447 4.1
24.3 4 15.4 700 1.0 4.5 2.8 1550 2250 1890 1560
28.9 4 14.4 700 1.0 4.5 2.8 1750 2250 1890 1560
CGAH030 CGAH040 15T+15T 2x(10T+10T) 1 2 2 4 128 170 74 98 64 85 30.7 43.8 96 128 55 74 48 64 468 361 263 211 199 168 263 365 4.4 3.5 HCFC-22 14.5 20.1 2 4 7.5 15.4 660 660 0.9 0.9 7.5 7.5 5.5 5.5 3.7 3.7 4.5 4.5 2.6 2.6 2.2 2.2 1050 1450 2060 2250 1020 1890 1860 1560
CGAH050 2x(10T+15T) 2 4 212 122 106 52.5 160 92 80 532 300 231 443 4.0
CGAH060 2x(15T+15T) 2 4 256 148 128 61.4 192 111 96 564 318 247 526 4.4
24.3 4 14.4 660 0.9 7.5 5.5 3.7 4.5 2.6 2.2 1650 2250 1890 1560
28.9 4 15.0 660 0.9 7.5 5.5 3.7 4.5 2.6 2.2 1900 2250 1890 1860
60Hz Model Compressors Circuit Capacity Steps Max Load Amps(1)
220V 380V 440V
C0mpressors Power input C0mpressors Running Current
C0mpressors Starting Current(2)
220V 380V 440V 220V 380V 440V
Rated Water Flow Evaporator Head Loss(H2O) Refrigerant Number Of Fan(s) Air Flow Rate Nominal Fan Speed Fan Motor Full Load Power input Each Fan Motor Staring Amps Each
Fan Motor Full Load Amps Each Operating Weight Lenght Width Height
220V 380V 440V 220V 380V 440V
A A A kW A A A A A A L.P.M. m Type kg EA m3 /s RPM kW A A A A A A kg mm mm mm
Notes: (1)Maximun load amps to be used for sizing of cables, fuses and disconnect swith. (2)Staring amps with one compressor staring, the remaining compressor(s) running at full load.
© American Standard Inc. 2001
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Performance Data 50Hz 25 MODEL CGAH020 (50Hz) CGAH025 (50Hz) CGAH030 (50Hz) CGAH040 (50Hz) CGAH050 (50Hz) CGAH060 (50Hz)
LWT (˚C) 5 7 9 5 7 9 5 7 9 5 7 9 5 7 9 5 7 9
Cap. kW(MBH) 53.7(183.3) 56.5(192.8) 59.3(202.4) 68.6(234.1) 72.2(246.4) 75.7(258.3) 82.1(280.2) 86.2(294.2) 90.3(308.1) 112.1(382.5) 118.0(402.7) 124.1(423.5) 137.2(468.2) 144.3(492.4) 151.3(516.3) 164.2(560.3) 172.4(588.3) 180.7(616.6)
30 In.P kW 15.2 15.4 15.7 19.1 19.4 19.6 22.3 22.6 22.8 29.4 29.7 30.1 38.3 38.8 39.3 44.5 45.1 45.7
Cap. kW(MBH) 51.1(174.4) 53.8(183.6) 56.5(192.8) 65.5(223.5) 68.9(235.1) 72.3(246.7) 78.5(267.9) 82.5(281.5) 86.4(294.8) 107.1(365.5) 112.9(385.3) 118.7(405.1) 131.1(447.4) 138.0(470.9) 144.7(493.8) 157.0(535.8) 164.9(562.7) 172.9(590.0)
Entering air temperature on condensing coil (˚C) 32 35 Cap. Cap. In.P In.P kW kW(MBH) kW kW(MBH) 16.8 50.2(171.3) 17.5 48.5(165.5) 17.0 52.7(179.8) 17.8 51.0(174.0) 17.3 55.4(189.1) 18.0 53.6(182.9) 21.0 64.3(219.4) 21.8 62.4(212.9) 21.3 67.6(230.7) 22.1 65.7(224.2) 21.6 71.0(242.3) 22.4 68.8(234.8) 24.4 77.0(262.8) 25.4 74.7(254.9) 24.7 80.9(276.1) 25.7 78.5(267.9) 25.1 84.8(289.4) 26.0 82.3(280.8) 32.2 105.2(359.0) 33.4 102.1(348.4) 32.6 110.9(378.4) 33.8 107.6(367.2) 33.0 116.6(397.9) 34.2 113.2(386.3) 42.0 128.7(439.2) 43.6 124.7(425.5) 42.6 135.3(461.7) 44.2 131.2(447.7) 43.1 142.0(484.6) 44.8 137.7(469.9) 48.8 153.9(525.2) 50.7 149.3(509.5) 49.5 161.8(552.1) 51.4 157.1(536.1) 50.1 169.7(579.1) 52.0 164.6(561.7)
In.P kW 18.6 18.9 19.2 23.1 23.4 23.7 26.8 27.2 27.5 35.4 35.8 36.2 46.2 46.8 47.4 53.7 54.4 55.1
40 Cap. kW(MBH) 45.7(156.0) 48.1(164.1) 50.5(172.3) 58.9(201.0) 62.0(211.6) 65.2(222.5) 70.6(240.9) 74.3(253.5) 77.9(265.8) 96.5(329.3) 101.9(347.7) 107.3(366.2) 117.8(402.0) 124.1(423.5) 130.4(445.0) 141.2(481.8) 148.6(507.1) 155.9(532.0)
In.P kW 20.7 21.0 21.3 25.5 25.8 26.1 29.5 29.9 30.3 38.9 39.4 39.9 51.0 51.6 52.2 59.1 59.8 60.6
Entering air temperature on condensing coil (˚C) 32 35 In.P Cap. In.P Cap. kW(MBH) kW(MBH) kW kW 21.3 60.5(206.5) 22.1 58.4(199.3) 21.6 63.5(216.7) 22.4 61.4(209.5) 22.0 66.4(226.6) 22.8 64.3(219.4) 25.2 76.3(260.4) 26.2 74.0(252.5) 25.6 80.2(273.7) 26.5 77.8(265.5) 25.9 84.0(286.6) 26.9 81.5(278.1) 29.3 90.8(309.9) 30.4 88.0(300.3) 95.2(324.9) 92.4(315.3) 29.7 30.8 30.1 99.8(340.6) 31.2 96.7(330.0) 43.6 125.5(428.3) 45.0 121.9(416.0) 44.2 132.3(451.5) 45.6 128.3(437.8) 44.7 138.9(474.0) 46.2 134.9(460.3) 50.4 152.7(521.1) 52.3 148.0(505.0) 51.2 160.5(547.7) 53.1 155.6(531.0) 51.9 168.1(573.6) 53.8 163.0(556.2) 58.6 181.5(619.4) 60.8 176.1(600.9) 59.4 190.5(650.1) 61.6 184.8(630.6) 60.2 199.3(680.1) 62.5 193.5(660.3)
In.P kW 23.4 23.7 24.1 27.7 28.1 28.4 32.1 32.6 33.0 47.3 47.9 48.5 55.3 56.1 56.9 64.2 65.1 66.0
40 Cap. kW(MBH) 55.0(187.7) 57.8(197.2) 60.0(206.8) 70.0(238.9) 73.6(251.2) 77.1(263.1) 83.4(284.6) 87.7(299.3) 91.8(313.3) 115.4(393.8) 121.6(415.0) 127.9(436.5) 140.0(477.7) 147.3(502.7) 154.4(526.9) 166.9(569.5) 175.2(597.9) 183.4(625.8)
In.P kW 25.7 26.1 26.5 30.3 30.8 31.2 35.2 35.7 36.2 51.4 52.0 52.7 60.7 61.6 62.4 70.5 71.4 72.4
60Hz 25 MODEL CGAH020 (60Hz) CGAH025 (60Hz) CGAH030 (60Hz) CGAH040 (60Hz) CGAH050 (60Hz) CGAH060 (60Hz)
LWT (˚C) 5 7 9 5 7 9 5 7 9 5 7 9 5 7 9 5 7 9
Cap. kW(MBH) 64.7(220.8) 68.0(232.0) 71.1(242.6) 81.5(278.1) 85.6(292.1) 89.6(305.8) 96.9(330.7) 101.6(346.7) 106.2(362.4) 134.0(457.3) 141.0(481.2) 148.1(505.4) 163.1(556.6) 171.2(584.2) 179.3(611.9) 193.7(661.0) 203.1(693.1) 212.5(725.2)
30 In.P kW 19.4 19.8 20.1 23.0 23.4 23.7 26.8 27.2 27.6 40.3 40.8 41.3 46.1 46.7 47.4 53.6 54.4 55.1
Cap. kW(MBH) 61.7(210.6) 64.8(221.1) 67.8(231.4) 77.9(265.8) 81.7(278.8) 85.6(292.1) 92.5(315.7) 97.1(331.4) 101.6(346.7) 128.1(437.1) 134.8(460.0) 141.6(483.2) 155.7(531.3) 163.6(558.3) 171.3(584.6) 185.0(631.3) 194.1(662.4) 203.0(692.7)
Notes: (1)Cap.-Cooling Capacity (2)In.P-Total Input Power
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Electrical connections
Typical wiring diagram(Wiring on actual unit need to refer to diagram attatched on control box)
1. The greatest care should be taken when cutting through passages and installing electric wiring. Under no circumstances should chips of metal or cuttings of copper or isolating material fall into the starter panel or electric components. Relays, contactors, terminals and control wiring should be covered and protected before power supplies are connected. 2. Install power supply cabling as shown in drawing. Adequate insulation should be chosen, ensuring no foreign bodies enter the electical housing or components. Caution: 1. Cabling must comply with standards in force. The type and location of fuses must also comply with standards. As a safety measure, fuses should be visibly installed, close to the unit. 2. Only copper wiring should be used.. Using aluminum wires can produce galvanic corrosion and possibly lead to superheat and failure of connection points.
© American Standard Inc. 2001
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© American Standard Inc. 2001
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General Start-Up
Preparation
Starting-up the unit
Before starting up the system. carry out the
Before start up:
following checks and operations:
Carry out all operations on check list and
1. Before making any electrical connection,
follow the instructions below to ensure that
insure that the isolation resistance of all
the unit is correctly installed and ready to
power supply terminals to ground
operate. The installer must check all the
complies with standards and regulations in
following points before calling in the Trane
force. Check the isolation of. all electric
servicing Department to put the equipment
motors using a 500 V DC megohmeter
into service.
which meets manufacturer’s specifications.
1. Chilled water circuit ready to operate,
Caution: Do not start up a motor whose Insulation resistance is less than 2 meghoms. 2. Check that all electrical connections are clean and sound. 3. Switch on mains power supply switch. Caution: Phase imbalance should not be greater than 2%. The voltage supplied to motors should be within 10% of the rated voltage shown on the compressor nameplate. 4. Check that unit power supplies match
7.Check direction of rotation of fan is discharging upwards. To ensure compressor is rotating correctly. 8.On start up of each motor in the system, check the direction of rotation and operation of all the components they drive. 9. Check extent of pressure drops through evaporator, so that the value matches
filled with water, pressure test carried out
values shown on graphs A and B, page14. 10. Check that there is sufficient demand for cooling on the day of start-up (around
and purged. 2. Thermometers and pressure gauges installed in chilled water circuit. 3. Chilled water pump interconnected to
50% of nominal load). Caution: Excessive emulsion shows that
control panel.( refer to wiring diagram)
refrigerant is present into oil and the
4. Check that all electrical connections are
result will be that compressor is not
clean and sound. 5. Check that mains power supply switch is sound.
lubricated enough. Shut down motor and identify cause. Excess oil in compressor may have as
6. Check compressor oil level at rest. The
much an adverse effect as not enough
lever should reach at least halfway up
oil. Before adding oil, consult Trane
indicator located on housing. See Fig. 4
technician. Use only products
for correct level.
recommended by Trane.
rated input power. Warning:
5. Insure all water and refrigerant valves are in service positions.
Figure 4: Compressor oil level
The water circuit to the evaporator may
6. Reset all manually set control devices.
be under pressure. Please refer to
7. Insure that sensors are properly installed
appropriate instructions to bring down
in their bulbwells and submerged in heat
this pressure before opening up the
conducting product. Check fixing of
system before rinsing or filling
capillary tubes (check protection from
operations. Failure
vibration and from wear, and insure that
to comply with this instruction may
they are not damaged).
cause accidental injury to maintenance personnel. Caution: The compressors must operate in a single direction of rotation. If refrigerant high pressure remains stable in the 30 seconds after compressor start up, immediately shut down unit and check the direction of rotation
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Start up 1. Start-up unit pushing button "1" of control module. The green LED must be lighted. 2. After unit star t-up. leave in operation for at least 15 minutes. to insure pressures are stabilized. Then check: • Compressor and fan current consumption. • Suction pressure. • Discharge pressure. • Superheat. • Subcooling. • Pressure drops and temperatures of evaporator.
Low temperature operations (air intake to
Final check
condenser)
When the unit is operating correctly, a final
If the unit is set to operate at low air intake
check should be made for the following
temperature, follow procedure below to
points:
insure the chilled water circuit is properly
1. Check that unit is clean, and clear of any
protected.
debris, tools, ect..
Insure that all pipes are perfectly protected
2. All valves in operating position.
against freezing.
3. Close control and starter panel doors, and
Otherwise use antifreeze solution in chilled water circuit. If for any reason. the heating resistors in the chilled water circuit cannot be energized, the solution must be able to withstand any ice formation in the circuit. When using the antifreeze solution, manufacturer’s instructions for filling of the
Superheat
chilled water circuit, the degree of protection
Normal superheat is 6 ˚C to 8 ˚C. Excess
and test procedures must be strictly
refrigerant supplied to the evaporator
followed.
check panels fixation. 4. After 2 hours of operation, clean the water strainer. Caution: Unit operation is function of the air temperature. Any recycling of the air fed out by the fans will increase the air intake temperature over the condenser fins and can result in high pressure cut-out.. (See Figure 5.)
produces high suction pressure, and a low degree of superheat can draw the refrigerant back to the compressor. Insufficient superheat is corrected by adjusting the
Figure 5: Service and Maintenance Clearance
expansion valve reduction lever. If this produces no result, it shows that the expansion valve is no longer operating satisfactorily. The expansion valve must be replaced. Sub-cooling If the system is correctly filled, the subcooling value of the refrigerant valve on the liquid line should be 8 ˚C to 10 ˚C on a standard unit. Condenser fan motors All fans are fixed directly to the motor shaft. The operating sequence of fans is controlled by the SMM module.
© American Standard Inc. 2001
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Figure A: Evaporator water pressure drop (mH 2O)-50Hz
Figure B: Evaporator water pressure drop (mH 2O)-60Hz
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Operation
Seasonal shutdown
Control System The control is throgh the SMM control module.
1. Push button "O" of the module. 2. If the water piping is not protected against freeze up, drain the evaporator by opening
Unit operations
the 1/4 connection on the water outlet
Start up unit pushing button "1" of the SMM
pipe.
control module. The unit will operate correctly when there is sufficient water flow at the evaporator. The compressors will start up if the evaporator water leaving temperature is above the SMM control module setpoint.
Seasonal start-up(requires qualified technician) 1. Ensure all the instructions in "Annual maintenance", in the "maintenance" chapter, have been complied with. 2. Fill up and purge chilled water circuits.
Weekly start up
3. Insure liquid line stop-valve is open.
Push button "1" of the module to allow chiller
4. Check the tightness of the refrigerant
operation.
circuit.
Week end shutdown
5. Start-up the chiller (see U nit operations)
If the unit needs to be shut down for a short
6. Check all interconnected devices operate
period of time, push button "O" of the module. If the unit is shut down for a longer
properly. 7. Check oil level and service pressures after
period, see under "Seasonal shutdown",
the system has been in operation for 15 to
below.
20 minutes, under full load. 8. Check that high and low pressures are correct.
© American Standard Inc. 2001
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Maintenance
The following maintenance instructions are
Recommended oil
5. Check contactors.
part of maintenance operations required for
Please refer to specific Trane documentation
6. Check adjustment and operation of each
this equipment. A qualified technician is
on oil, available from your nearest Trane
needed for regular maintenance as part of a
agency.
regular maintenance as part of a regular maintenance contract. Carry out all operations as required by schedule. This will insure long unit service life and reduce the possibility of serious and costly breakdown. Keep service records up to date, showing weekly information on unit operations. These records can be of great help to maintenance personnel diagnostics. Similarly, if machine operator keeps a log of changes in unit operating conditions, problems can be identified and solutions found before more serious problems arise. Weekly maintenance 1. Check compressor oil level at rest. Oil
control device. 7. Check the tightness of the refrigerant circuit.
Note: Oils recommended by Trane have been exhaustively tested in Trane laboratories
8. Check insulation of motor windings. 9. Clean the water strainer.
to the specific requirements of Trane
Other interventions may be necessary,
compressors, and hence the user’s
depending on the age and service life of
requirements. Any use of oils not
unit.
meeting specifications recommended by Trane is the responsibility of the user only, who thereby is liable to loss warranty.
Note: It is important for unit to be regularly maintained by a qualified technician, at least once a year or every 2,000 hours of
Annual maintenance 1. Check chilled water circuit, valve, pipes,
operation. Contact Trane Service for information on maintenance contracts.
and clean filters if necessary. Analyze
A maintenance inspection by a qualified
water quality. Cleaning may be required, in
technician is also recommended after the
which case use professional assistance.
first 500 hours of operation from unit startup.
level should be halfway up sightglass
Caution:
located on the housing. (See Figure 4)
Chilled water circuit may be pressurized.
Caution:
Check instruction to reduce circuit
Switch off unit mains power supplies
damaging as not enough oil. Before
pressure before opening chilled water
before any intervention. Failure to follow
topping up, contact a qualified technician.
circuit. Failure to comply with this
this safety instruction can lead to
Use only Trane-recommended oils.
instruction may result in accident or
accident death of the maintenance
injury to maintenance personnel.
personnel and may also destroy
2. Excess oil in the compressor can be as
Caution: Excessive emulsion indicates presence
2. Clean corroded outer surfaces, and
of refrigerant in oil, resulting in poor
repaint.
lubrication of compressor. Stop motor
Check electrical panel seal door.
and check cause. 3. Inspect the entire system for undesirable effects, such as noisy compressor, loose access panels, leaks in pipes, or vibrating contactors. 4. Keep records of temperatures, pressures, dates and times, or other observations in log book.
3. Check the tightness of the chilled water circuit. Check circulating pump operation and associated devices.
equipment. Cleaning of condensers Clean the condenser coils with a brush or jet of water. Please spray water from inside the unit. If the batteries are too dirty. consult a cleaning professional.
Check percentage of anti-freeze in chilled
Caution:
water circuit, and top up as necessary.
Never steam clean condenser coils
4. Carry out all weekly maintenance
because the resulting increase in pressure could cause some refrigerant to
inspections.
be lost through the safety valve.
17
CGAH-SVX01A-EN
Troubleshooting guide These are simple diagnostic. If there is a breakdown, the Trane Service Agency should be contacted for confirmation and assistance.
A. The compressor will not start up Problems symptoms
Probable cause
Action recommended
Compressor terminals are live but motor
Motor burned out.
Replace compressor.
Contactor motor not operational
Coil burned out or broken contacts.
Repair or replace.
No current ahead of motor contactor.
a)Power cut
Check fuses and connection.
b)Mains power supply switched off.
See why system tripped.
dose not start.
If system is operational, switch on mains power supply. Current ahead of fuse, but not on
Fuse blown.
Check motor insulation. Replace fuse.
Low voltage reading on voltmeter.
Voltage too low.
Contact Power Supply Utility.
Starter coil not excited.
Regulation circuit open.
Locate regulation device which has tripped
contactor side.
out, and see why. See instructions concerning this device. Compressor does not run. Compressor
Compressor sticking (damaged or sticking
motor "groans".
components).
Replace compressor.
B. Compressor stops Problems symptoms
Probable cause
Action recommended
High pressure switch tripped.
Discharge pressure too high.
See instructions for "discharge pressure too high".
Over current thermal relay tripped
a) Voltage too low.
a) Contact Power Supply Utility.
b) Cooling demand too high, or condensing
b) See instruction "discharge pressure too
temperature too high.
high".
Motor temperature thermostat tripped.
Not enough cooling fluid.
Repair leak. Add refrigerant
Anti-freeze security tripped.
Water flow to evaporator too low
Check water flow rate, and pressure switch contact in water.
© American Standard Inc. 2001
18
CGAH-SVX01A-EN
C. Compressor stops just after its start Problems symptoms
Probable cause
Action recommended
Suction pressure too low.
Filter drier clogged
Replace filter drier.
Filter drier iced up.
D. The compressor keeps running without stopping Problems symptoms
Probable cause
Action recommended
Temperature too high in areas requiring air-
Excess load on cooling system.
Check thermal insulation and air-tightness
conditioning. Chilled water temperature output too high.
of areas requiring air-conditioning. Excess cooling demande on system.
Check thermal insulation and air-tightness of areas requiring air-conditioning.
E. Loss of oil in compressor Problems symptoms
Probable cause
Action recommended
Oil level too low in indicator.
Not enought oil.
Add oil.
Gradual fall of oil level.
Filter drier clogged.
Replace filter drier.
Suction line too cold.
Liquid flows back to compressor.
Adjust superheat and check bulb fixing of
Compressor noisy.
the expansion valve.
F. Compressor noisy Problems symptoms
Probable cause
Action recommended
Compressor knocks.
Components broken in compressor
Change compressor.
suction duct abnormally cold.
a) Uneven liquid flow.
a) Check superheat setting and fixing or
b) Expansion valve locked in open position.
expansion valve bulb. b) Repair or replace.
G. Insufficient cooling capacity Problems symptoms
Probable cause
Action recommended
Thermostatic expansion valve "whistles".
Not enough refigerant.
Check refrigerant circuit tightness and add refrigerant.
Excess pressure drops through filter drier.
Drier filter colgged.
Replace.
Excessive superheat.
Superheat not properly adjusted.
Check adjustment of superheat and adjust thermostatic expansion valve.
Insufficient water flow.
Chilled water pipes obstructed.
19
Clean pipes and strainer.
CGAH-SVX01A-EN
H. Discharge pressure too high Problems symptoms
Probable cause
Action recommended
Condenser abnormally hot.
Presence of uncondensable liquids in
Purge uncondensable fluids and drain off
system, or excess of refrigerant.
excess refrigerant.
Overload on cooling system.
Reduce load on system.
Chilled water leaving temperature too high
Reduce water flow if necessary. Condenser air output too hot.
Reduced air flow. Air intake temperature
Clean coil. Check operation of fan motor.
higher than specified for unit.
I. Suction pressure too high Problems symptoms
Probable cause
Action recommended
Compressor operates continuously.
Excess cooling demand on evaporator.
Check system.
Suction duct abnormaly cold.
a) Expansion valve too far open.
a) Check for superheat and check that
Refrigerant flows back to compressor.
b) Expansion valve looked in open position.
expansion valve bule is secure. b) Replace.
J. Suction pressure too low Problems symptoms
Probable cause
Action recommended
Excessive pressure drop through filter
Filter drier clogged.
Replace the filter drier.
drier. Refrigerant does not flow through
Expansion valve bulb has lost its refrigerant.
Replace the bulb of the expansion valve.
Loss of power
Expansion valve obstructed.
Replace.
Superheat too low.
Excessive pressure drops though evaporator.
Check adjustment of superheat and adjust
thermostatic expansion valve.
thermostatic expansion valve.
K. Insufficient cooling capacity Problems symptoms
Probable cause
Action recommended
Low pressure drops through evaporator
Low water flow rate.
Check water flow rate. Check state of strainer check for obstruction in chilled water pipes. Check pressure switch contact in water.
Caution: The above is not a comprehensive analysis
so that they have the technical knowledge
of the Scroll compressor refigeration
to identify and bring defective operations
system. The aim is to give operators
to the notice of qualified technicians.
simpleinstruction on basic unit processes © American Standard Inc. 2001
20
CGAH-SVX01A-EN
Installation checklist CGAH Trane Air Cooled Liquid Chiller This list must be checked off by the installer to ensure correct installation before the unit starts up.
Unit acceptance
Electrical equipment
Check for damage, if any, on
Check direction of rotation of compressor
transportation.
and fan motors
Check for equipment shipped against
Check chilled water pump drive roation Check installation and rating of mains
delivery slip. Check lifting system
power switch/fuse Check that electrical connections comply
Unit positioning Remove packaging Check position of unit Check unit is level Check clearance around condenser Check clearance required for
maintenance access Check position of rubber pads.
Chilled water circuit Check presence of stainer ahead of
evaporator Check the tightness of the water circuit Check thermometer positioning
with specification Check that electrical connections match
information on manufacturer’s identification plate. Check electrical connections and
connections to mains power switch Water pressure switch.
General Check available cooling charge (50% of
rated installation load) Check with other trades handling
installation works.
Check manometer positioning Check chilled water flow rate balancing
system Check rinsing and filling of chilled water
pipes Check pump operation and water flow.
21
CGAH-SVX01A-EN
Hardware
• When the jumper is in position 1, the
Figure 6: Base Module
auxiliary module is used to control the circuit 2. • When the jumper is in position 2, the auxiliary module is used to control the fans. • When the jumper is in position 3, the auxiliary module is used to control the leaving hot water temperature. • When the jumper is in position 4, the auxiliary module is used to allow to display the evaporator and condenser inlet water temperatures.
Figure 7: Auxiliary Module
© American Standard Inc. 2001
22
CGAH-SVX01A-EN
Operation of the module
Function of keys 0 and 1
How to have access to the
How to have access to the
The key 1 is used to allow the start of the
menu A?
menu B?
Press 1 time on the key
Press twice on the key
The following message appears
The following message appears
compressor. The key 0 is used to stop the chiller. When the operator press on key 0, the
following message appears: A operator stop
How to reset the SMM? Press 3 times on the key the following message appears
C
Press 1 time on the key Press 1 time on the key The following message appears
C 02
NO
The following message appears
CLEAR
Press 1 time on the key during 5 seconds. The hour and the leaving chilled water temperatures are displayed. The orange LED is switched off. Notes If one of the following faults is displayed:
B
Chilled water set point is displayed.
The leaving chilled water temperature set
A01
Value ˚C
point value is displayed.
To change the value, press on the keys
or
To have access to the following information,
To have access to the following parameters,
press the key
press on the key
To exit the menu press the key during a
To change the value of these parameters,
few seconds.
press on the keys or
Information contained in the menu A A01 Active water setpoint A02 Evaporator water outlet mix A03 Circuit 1 evaporator water outlet temperature A04 Circuit 2 evaporator water outlet temperature A05 Air temperature A06 Number of compressor A1 operating hours A07 Number of compressor A1 starts A08 Number of compressor B1 operating hours A09 Number of compressor B1 starts
M comp A2 fault
A10 Number of compressor A2 operating hours
M comp B2 fault
A11 Number of compressor A2 starts
the corresponding overload relays must be
A12 Number of compressor B2 operating
reset before to reset the SMM.
Press 1 time on the key
M comp A1 fault M comp B1 fault
Press 1 time on the key
temperature
Press on the key
C 02
A
hours A13 Number of compressor B2 starts
To exit this menu, press the key
during
a
few seconds. Parameters which can be modified in the menu B B01 Evaporator outlet temperature setpoint Setting -26.0˚C to 30.0˚C by 0.1˚C increment. Default value 6.0. B02 Hot water outlet temperature setpoint Setting 20.0˚C to 60.0˚C by 0.1˚C increment. Default value 45.0.
B03 Auxiliary water outlet temperature setpoint Setting -26.0˚C to 60.0˚C by 0.1˚C increment. Default value 6.0. B04 Circuit 1 ON validation Enabled circuit: Enable. Disabled circuit: Disable. Default value: Enable B05 Circuit 2 ON validation Enabled circuit: Enable. Disabled circuit: Disable. Default value: Enable B06 Operating mode Cooling mode: Cooling Heating mode: Heating Serial link control: Extern Default value: Cooling
23
CGAH-SVX01A-EN
B07 Remote control validation
D08 Heating reset range
How to have access to the
Remote control: Remote
Setting -15˚C to 15˚C by 0.1˚C
menu D?
Local control: Local
increment. Default value 5.0.
Press 4 times on the key
Default value: Local B08 Auxiliary setpoint validation Enabled circuit: Enable. Disabled circuit:
Example of programmation of the chilled
The following message appears
water temperature set point in function of
D
the air temperature
Disable. Press 1 time on the key
Default value: Disable
Expected operation
The following message appears
B09 Current date display B091 day-setting 1 to 31
D 01
B092 month-setting 1 to 12 B093 year-setting 00 to 99. B10 Current hour display B101 hour-setting 00 to 23 B102 Minutes-setting 00 to 59 B103 Seconds-setting 00 to 59.
Set point (˚C)
None
12
To change the value, press on the keys
or
To have access to the following parameters, press on the key
7
To change the values of these parameters, press on the keys or K To exit this menu, press on the key
20
30
Outside temp.(˚C)
Values to be programmed during
Parameter
Value
B12 Set this parameter at 0,0˚C
a few seconds.
B01
12,0
B13 Set this parameter at 0,0˚C
Parameters which can be modified in the
D01
Air
menu D
D02
20,0
D01 Cooling setpoint reset type
D03
10,0
D04
-5,0
B11 Set this parameter at 0,0˚C
How to have access to the
None: None-On air: Air-On water: Ret.
menu C ?
Wat.-Default value: None
Press 3 times on the key The following message appears
C
D03 Cooling reset value range Setting 2˚C to 20˚C by 0.1˚C increment.
The last fault is displayed. to display
the last 20 faults Press successively on the key to display the last fault. To exit this menu, press during a few seconds on the key . This menu is used also to reset the SMM(see parapragh How to reset the SMM?)
Setting 2˚C to 55˚C by 0.1˚C increment. Default value 20.0.
Press 1 time on the key Press successively on the key
D02 Cooling reset starting value
Default value 10.0. D04 Cooling reset range Setting -15˚C to 15˚C by 0.1˚C increment. Default value 5.0. D05 Heating setpoint reset type None: None-On air: Air-On water: Ret. Wat.-Default value: None D06 Heating reset starting value Setting 2˚C to 55˚C by 0.1˚C increment. Default value 20.0. D07 Heating reset value range Setting 2˚C to 20˚C by 0.1˚C increment. Default value 10.0.
© American Standard Inc. 2001
24
D09 Generic input type 0..10 Volts
0..10V
2..10 Volts
2..10V
0.20mA
0..20mA
4..20mA
4..20mA
Default value
0..10V
10V or 20 mA lead to a chilled water temperature set point reset of 20˚C. D10 Evaporator pump stop timer Setting 1 to 10 mn by 1 mn increment. Default value 1. D11 Evaporator water pump automatical cleaning None
None
6 hours
6H
12 hours
12H
24 hours
24H
48 hours
48H
Default value
None CGAH-SVX01A-EN
D12 compressor lead-lag
D14 Default 2 report type
Increasing fix
1-2
Decreasing fix
2-1
Unit or circuit 1
Start and hour balancing
Auto
manual reset default
Automatic inversion at each star
TRANE
Unit or circuit 2
Default value
TRANE
manual reset default
value
The parameters D13 and D14 are used
Unit or circuit 1
to determine the conditions under which
automatic reset default
the fault relays switch on.
Unit or circuit 2
D13 Default 1 report type
Displayed
automatic reset default
value
Circuit 1 not available
Unit or circuit 1 manual reset defaulbit
or in limit bit 0
1
or in limit bit 1
2
on unit bit 2
4
bit 3
8
bit 4
16
bit 5
32
bit 6
64
Default value
Unit or circuit 2 automatic reset default
or in limit
Default value
1
2
bit 2
4
menu E? Press 5 times on the key
E
Press 1 time on the key The saturated refrigerant temperature inside
bit 3
8
circuit 1 evaporator is displayed.
E01 bit 4
16
bit 5
32
bit 6
64
2
Value ˚C
To have access to the following information, press on the key To exit this menu, press on the key
during
a few seconds. information contained in the menu E E01 Circuit 1 evaporator saturated
relay 1 (D13) switches on if a manual or an automatic reset fault occur. i.e.in the cases corresponding to the dits 0, 1, 2 and 3. In this case, we have to display
Informational default on unit
bit 1
on a 2 circuit unit, we wish that the fault
Circuit 2 not available
How to have access to the
The following message appears
Example:
Circuit 1 not available or in limit
1
Informational default
Unit or circuit 1 automatic reset default
bit 0
Circuit 2 not available
Unit or circuit 2 manual reset default
Displayed
the value 15 (1+2+4+8)
temperature E02 Circuit 1 evaporator saturated pressure E03 Circuit 1 condenser saturated temperature E04 Circuit 1 condenser saturated pressure E05 Circuit 2 evaporator saturated temperature
D15 Serial link address setting 0 to 62. Default value 0.
E06 Circuit 2 evaporator saturated pressure E07 Circuit 2 condenser saturated temperature
Use For comfort type application, increasing the
E08 Circuit 2 condenser saturated pressure
reset point when the air temperature
E09 Evaporator water inlet temperature
decreases allows to obtain better C.O.P. at
E10 Condenser water outlet temperature
part load, so to decrease the energy
E11 Condenser water inlet temperature
consumption.
25
CGAH-SVX01A-EN
Explanation of the fault codes
Displayed messages
Description
Action
I Service demand I E2P par.chg
Service request on the unit: one of the compressor configurated as presently has reached the value 1 When powering-up the module, one or more of the operating parameters in E2PROM was incorrect and
I XRAM par.chg
has been corrected (default value). Check the configuration. When powering-up the module, one or more of the operating parameters in XRAM was incorrect and has Check the configuration
I E2P par.prog.
been corrected (default value). Check the configuration. When powering-up the module, all the operating parameters in EPROM were incorrect and have beem
Check the configuration
A User ckt2 stop A Ext. ckt1 stop A Ext. ckt2 stop
replaced by their default value. Make the configuration. Circuit 1 is forced to stop due to the operator's configuration(menu B04) Circuit 2 is forced to stop due to the operator's configuration(menu B05) Circuit 1 is forced to stop due to an external cause, by the O/l input Auto/Stop 1. Circuit 2 is forced to stop due to an external cause, by the O/l input Auto/Stop 2.
For info only. No necessary action For info only. No necessary action For info only. No necessary action For info only. No necessary action
A Rem. ckt1 stop A Rem. ckt2 stop
Circuit 1 is forced to stop by the serial link. Circuit 2 is forced to stop by the serial link.
For info only. No necessary action For info only. No necessary action
A User unit stop
Unit is forced to stop due to the operator's configuration. On single circuit units, this message is displayed For info only. No necessary action if circuit 1 is devalidated (menu B04). On dual circuit this message is displayed if both circuits 1 and 2 are devalidated (menu B04 and menu B05) Unit is forced to stop due to an external causes. On single circuit units, this message is displayed if circuit For info only. No necessary action
A User ckt1 stop
A Ext. unit stop
Contact Trane Service Agency Check the configuration
1 is devalidated (O/I input Auto-Stop 1)On dual circuit units, this message is displayed if both circuits 1 A Rem. unit stop
and 2 are devalidated (O/l input Auto/Stop 1 and Auto/stop 2). Unit is forced to stop by the serial link. On single circuit units, this message is displayed if circuit 1 is devalidated by the serial link. On dual circuit units, this message is displayed if both circuits 1 and 2 are
For info only. No necessary action
devalidated by the serial link. A Operator stop I E2prom fault
The unit is stopped by the operator who has prshed key 0. A default occured when writing information in E2PROM.The value in memory may not be right and thus
For info only. No necessary action Switch off the SMM during 5 seconds
corrected at next powering-up. A Ckt1 limiting
A Ckt2 limiting
One of the compressors of circuit 1 is prevented to start because one of the limitation is active (evaporator 1 outlet water temperature below the evaporator outlet water temperature low setpoint, evaporator 1 refrigerant temperature below the refrigerant temperature low setpoint, evaporator outlet temperature too high). One of the compressors of circuit 2 is prevented to start because one of the limitation is active
For info only. No necessary action
For info only. No necessary action
(evaporator 2 outlet water temperature below the evaporator outlet water temperature low setpoint, evaporator 2 refrigerant temperature below the refrigerant temperature low setpoint, evaporator outlet
A Ckt1 HP limit.
water temperature too high). NB: this message can be displayed on 3 compressor units but without any influence on the operation of circuit 2. The condenser side refrigerant pressure on circuit 1 is too high, and the system reduces the number of
Check condenser cleaning and fan state.
A Ckt2 HP limit.
compressors in operation until its complete stop if necessary. The condenser side refrigerant pressure on circuit 2 is too high, and the system reduces the number of
Check condenser cleaning and fan state.
A Low ambience
compressors in operation until its complete stop if necessary. The outdoor air temperature is lower than the low ambient setpoint.
For info only. No necessary action
A Ckt1 defrost A Ckt2 defrost
Circuit 1 is de-icing and thus preventing the operation of circuit 2 (if present) Circuit 2 is de-icing and thus preventing the operation of circuit 1
For info only. No necessary action For info only. No necessary action
A EVP water flow
Loss of evaporator water flow during more than 2 sec. lf one of the compressor was operating, then the default LED is lit, if not, it is not lit.
Check chilled water pump state.
A Sensor 4 main
The customer analogical in put is configurated as 2..10V or 4..20 mA and the signal is lower than 1V or 2 Check configuration of parameter D09 and mA. analogic inlet.
A Sensor 1 I/O 2
Sensor 1 (air temperature) of module I/O 2 is out of range (short circuit 40˚C, or circuit open 80˚C).
© American Standard Inc. 2001
26
Change the sensor.
CGAH-SVX01A-EN
Displayed messages
Description
Action
A Sensor 1 I/O 3
Sensor 1 (condenser water outlet temperature) of module I/O 3 is out of range (short circuit 40˚C, or circuit open 80˚C).
Change the sensor.
A Sensor 1 I/O 4
Sensor 1 (evaporator water inlet temperature) of module I/O 4 is out of range (short circuit 40˚C, or circuit open 80˚C).
Change the sensor.
A Sensor 1 main
Sensor 1 (evaporator 1 water outlet temperature) of the main module is out of range (short circuit 40˚C, or circuit open 80˚C).
Change the sensor.
A Sensor 2 main
Change the sensor.
A Sensor 1 I/O 1
Sensor 2 (evaporator 1 refrigerant saturated temperature) of the main module is out of range (short circuit 40˚C, or circuit open 80˚C). Sensor 3 (evaporator 1 refrigerant saturated temperature) of the main module is out of range (short circuit 40˚C, or circuit open 80˚C). Sensor 1 (evaporator 2 water outlet temperature) of module I/O 1 is out of range (short circuit 40˚C, or
A Sensor 2 I/O 1
circuit open 80˚C). Sensor 2 (evaporator 2 refrigerant saturated temperature) of module I/O 1 is out of range (short circuit
A Sensor 3 main
A Sensor 3 I/O 1 A Com I/O 1
40˚C, or circuit open 80˚C). Sensor 3 (evaporator 2 refrigerant saturated temperature) of module I/O 1 is out of range (short circuit 40˚C, or circuit open 80˚C). The main module does not communicate anymore with module I/O 1. Check the link wiring with this
Change the sensor. Change the sensor. Change the sensor. Change the sensor. Check the link wiring
module as well as its address (circuit 2 board) A Com I/O 2 A Com I/O 3
The main module does not communicate anymore with module I/O 2. Check the link wiring with this module as well as its address (air-cooled unit board) The main module does not communicate anymore with module I/O 3. Check the link wiring with this
Check the link wiring Check the link wiring
module as well as its address (reversible unit board) A Com I/O 4
The main module does not communicate anymore with module I/O 4. Check the link wiring with this module as well as its address (option doard)
Check the link wiring
M Low ref.ckt1 M Low ref.ckt2
Evaporator 1 refrigerant saturated temperature has overtaken the refrigerant low remperature setpoint.
Check expansion valve state and refrigerant load
Evaporator 2 refrigerant saturated temperature has overtaken the refrigerant low remperature setpoint. Evaporator 1 water outlet temperature has overtaken the evaporator water low temperature setpoint. Evaporator 2 water outlet temperature has overtaken the evaporator water low temperature setpoint.
Check expansion valve state and refrigerant load
M Pressure ckt1 M Pressure ckt2 M Discharge ckt1
Circuit 1 has been put in consecutive stand-by too near: thus it is stopped. Circuit 2 has been put in consecutive stand-by too near: thus it is stopped.
Check condenser cleanliness Check condenser cleanliness
One of the circuit 1 compressors has operated during a too long period with a high discharge temperature: thus it is stopped.
Check refrigerant load
M Discharge ckt2
Check refrigerant load
M Comp. A1 fault
One of the circuit 2 compressors has operated during a too long period with a high discharge temperature: thus it is stopped. The compressor A1 default I/O input shows a default.
M Comp. B1 fault M Comp. A2 fault
The compressor B1 default I/O input shows a default. The compressor A2 default I/O input shows a default.
Reset the overload relay of compressor B1 Reset the overload relay of compressor A2
M Comp. B2 fault M ckt1 fault
The compressor B1 default I/O input shows a default. The compressor A1 and B1 default I/O inputs simultaneously show a default.
Reset the overload relay of compressor B2 Reset pressostat HP, circuit 1
M ckt2 fault M Unit fault
The compressor A2 ( and B2 if present) default I/O inputs simultaneously show a default. All the present compressor default I/O inputs simultaneouslyshow a default.
Reset pressostat HP, circuit 2 Reset pressostats and thermal relays
M Low water ckt1 M Low water ckt2
Check chilled water flow Check chilled water flow
Reset the overload relay of compressor A1
Note
The first letter of the displayed message indicates the type of default I for information A automatic reset default
M manual reset defauit
27
CGAH-SVX01A-EN
FM 38631 ISO 9002 Qualified factory
Literature Order Number North American Group The Trane Company 3600 Pammel Creek Road La Crosse, Wl 54601-7599
CGAH-IOM-2
File Number
CGAH-SVX01A-EN-0200
Supersedes
CGAH-IOM-1
Stocking location
Taipei Taiwan
http : // www.trane.com
Since The Trane Company has a policy of continuous product improvement, it reserves the right to change design and An American-Standard Company
specifications without notice.
