Specifications

52
Alarm/Alert Alarm Description Why was this Action taken Reset Probable
code or Alert alarm generated ? by control method cause
0 – No alarms or alerts exist – – –
1.xx Alert Compressor A1 failure See CPM subcodes below See CPM subcodes below Manual
2.xx Compressor A2 failure See CPM subcodes below See CPM subcodes below Manual
5.xx Compressor B1 failure See CPM subcodes below See CPM subcodes below Manual
6.xx Compressor B2 failure See CPM subcodes below See CPM subcodes below Manual
CPM Subcodes All are alarm codes
(xx)
0 – No error – – –
1 High pressure switch trip HPS input to CPM module open Comp. shut down Manual Loss of condenser water flow.
Operation beyond chiller capability.
Liquid valve not open.
2 No motor current CPM module reads less than Comp. shut down Manual Power supply disconnected, blown
10 % of MTA on all legs fuse(s), wiring error, contactor not
for > 3 seconds energized, faulty current toroid.
25 Current imbalance CPM measures current Circuit shut down Manual Loose terminals on power wires.
> 10 % (Alarm) balance between phases Poor power supply. Displayed only
greater than 10 % if alarm feature is enabled in
<3> <SRVC>
27 Current imbalance CPM measures current None Loose terminals on power wires.
> 10 % (Warning) balance between phases Poor power supply. Displayed only
greater than 10 % if alarm feature is disabled in
<3> <SRVC>
3 Current imbalance CPM measures current Circuit shut down Manual Loose terminals on power wires.
> 18 % (Alarm) balance between phases Poor power supply.
greater than 18 % for
25 minutes
35 Single phase current loss CPM measures current Circuit shut down Manual Blown fuse, wiring error.
balance between phases
greater than 20 %
4 High motor current CPM detects high current Comp. shut down Manual Operation beyond chiller capability,
compared to MTA setting improperly punched configuration header,
blown fuse.
5 Ground fault CPM detects ground Comp. shut down Manual Motor winding(s) gone to ground,
current (2.5 ± 2.0 amps) wiring error.
55 Voltage imbalance CPM measures voltage Circuit shut down Manual Compressor fault, local utility.
> 3 % (Alarm) balance between phases supply imbalance. Poor power supply.
greater than 3 % Displayed only if alarm feature is enabled
in <3> <SRVC>
57 Voltage imbalance CPM measures voltage None Compressor fault, local utility.
> 3 % (Warning) balance between phases supply imbalance. Poor power supply.
greater than 3 % Displayed only if alarm feature is disabled
in <3> <SRVC>
6 Voltage imbalance CPM measures voltage Circuit shut down Manual Compressor fault, local utility.
> 7 % balance between phases supply imbalance.
greater than 7 % for
25 minutes
65 Single phase Volts loss CPM measures current Circuit shut down Manual Blown fuse, wiring error.
balance between phases
greater than 20 %
7 Volt phase reversal CPM detects incoming Manual Supply power not in phase.
power supply out of phase Interchange any two incoming leads.
75 Contactor failure CPM detects min. 10 % of Chiller shut down Manual Faulty contactor, contactor welded,
MTA for 10 seconds after wiring error.
shutting off compressor
contactor. Oil solenoid is
energized.
8 Current phase reversal CPM detects phase reversal Circuit shut down Manual Multiple terminal block power supply
from toroid reading leads not in phase. Interchange any two
leads at ONE of the terminal blocks.
85 Motor over temperature CPM detects high motor Comp. shut down Manual Solenoid failure, low refrigerant charge.
temperature
9 Open thermistor CPM detects open circuit Comp. shut down Manual Wiring error or faulty thermistor*
in motor temp. thermistor
95 Config header fault CPM finds error with MTA Comp. shut down Manual Header on CPM board improperly
value punched out in header punched out, header not fully seated in
CPM board.
10 Shorted thermistor CPM detects short circuit Comp. shut down Manual Wiring error or faulty thermistor*
in motor temp. thermistor
7 Alert Cir. A discharge gas Thermistor outside range of Circuit A shut down Manual Thermistor failure, motor cooling
Thermistor failure of -40 to 118°C or DGT solenoid failure or wiring error.
> 98.9°C
8 Alert Cir. B discharge gas Thermistor outside range of Circuit B shut down Manual Thermistor failure, motor cooling
Thermistor failure of -10 to 118°C or DGT solenoid failure or wiring error.
> 98.9°C
9 Alarm Cooler leaving fluid Thermistor outside range of Chiller shut down Automatic Thermistor failure, damaged
Thermistor failure of -40 to 118°C Uses 0.1°F/% total cable/wire or wiring error.
capacity as rise/ton.
10 Alarm Cooler entering fluid Thermistor outside range of Chiller shut down Automatic Thermistor failure, damaged
Thermistor failure of -40 to 118°C Uses 0.1°F/% total cable/wire or wiring error.
capacity as rise/ton.
Alarms and alerts codes table