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Table 16 — Alarm and Alert Codes
DISPLAY
ALARM
DESCRIPTION
ACTION TAKEN CIRCUIT RESET
PROBABLE CAUSEOR
ALERT
BY CONTROL PUMPDOWN METHOD
0 — No Alarms or Alerts Exist — — — —
1
Alert
Compressor A1 failure Circuit A shut down No Manual High-pressure switch trip, or wiring
error.
2, 3, 4 Compressor A2, A3, A4 failure Compressor shut down Yes Manual CPCS Ground Fault Protection
5 Compressor B1 failure Circuit B shut down No Manual
6, 7, 8 Compressor B2, B3, B4 failure Compressor shut down Yes Manual
9
Alarm
Leaving fluid thermistor failure Unit shut down Yes Auto.
Thermistor or transducer failure
or wiring error.
10 Entering fluid thermistor failure Unit shut down Yes Auto.
19
Alert
Compressor A1 sensor failure Circuit A shut down Yes Auto.
20 Compressor B1 sensor failure Circuit B shut down Yes Auto.
21 Reset thermistor failure Normal set point used No Auto.
22
Alert
Discharge pressure transducer failure, circuit A Circuit A shut down Yes Auto.
Transducer failure or wiring error.
23 Discharge pressure transducer failure, circuit B Circuit B shut down Yes Auto.
24 Suction pressure transducer failure, circuit A Circuit A shut down No Auto.
25 Suction pressure transducer failure, circuit B Circuit B shut down No Auto.
26 Oil pressure transducer failure, circuit A Circuit A shut down No Auto.
27 Oil pressure transducer failure, circuit B Circuit B shut down No Auto.
28
Alarm
Transducer supply voltage low Unit shut down No Auto. Unit voltage low or PS1 faulty.
29 LOCAL/ENABLE-STOP-CCN Unit shut down No Manual Switch failure or wiring error.
30
Alert
4-20 mA reset input failure Normal set point used No Auto.
31 4-20 mA demand limit failure Demand limit ignored No Auto.
32
Alarm
Loss of communication with DSIO-LV Unit shut down No Auto. Wiring error or faulty module
or improper address code.
33 Loss of communication with DSIO-EXV Unit shut down No Auto.
34 Loss of communication with 4 In/4 Out module Unit shut down Yes Auto.
35 — Not used — — — —
36
Alert
Low refrigerant pressure circuit A Circuit A shut down No * Low refrigerant charge, plugged filter
drier, faulty expansion valve.
37 Low refrigerant pressure circuit B Circuit B shut down No * Low refrigerant charge, plugged filter
drier, faulty expansion valve.
38
Alert
Failure to pump out circuit A Circuit A shut down No Manual Faulty expansion valve, transducer,
or thermistor.
39 Failure to pump out circuit B Circuit B shut down No Manual Faulty expansion valve, transducer,
or thermistor.
40
Alert
Low oil pressure circuit A Circuit A shut down No Manual Low oil level, circuit breaker trip,
faulty expansion valve, crankcase
heater, or pressure transducer.
41 Low oil pressure circuit B Circuit B shut down No Manual Low oil level, circuit breaker trip,
faulty expansion valve, crankcase
heater, or pressure transducer.
42
Alarm
Cooler freeze protection Unit shut down No * Low fluid flow or faulty thermistor.
43 Low cooler fluid flow Unit shut down No Manual Chilled fluid pump failure
or faulty thermistor.
44
Alert
Low suction temperature circuit A Circuit A shut down
after 10 minutes
No Manual Faulty expansion valve or thermistor.
45 Low suction temperature circuit B Circuit B shut down
after 10 minutes
No Manual Faulty expansion valve or thermistor.
46
Alert
High suction superheat circuit A Circuit A shut down Yes Manual Low charge, faulty expansion valve or
thermistor, or plugged filter drier.
47 High suction superheat circuit B Circuit B shut down Yes Manual Low charge, faulty expansion valve or
thermistor, or plugged filter drier.
48
Alert
Low suction superheat circuit A Circuit A shut down Yes Manual Faulty EXV or thermistor.
49 Low suction superheat circuit B Circuit B shut down Yes Manual Faulty EXV or thermistor.
50
Alarm
Illegal configuration Unit cannot start — Manual Configuration error.
51 Initial configuration required Unit cannot start — Manual Configuration omitted.
52 Emergency stop by CCN command Unit shut down Yes CCN Network command.
53
Alarm
Cooler pump interlock failure Unit shut down No Manual Failure of cooler pump or controls
54 Cooler pump interlock failure Unit shut down No Manual Failure of cooler pump or controls
55 Cooler pump interlock failure Cooler pump shut down — Manual Failure of cooler pump relay or interlock
56 Alert WSM communication failure WSM forces removed — Auto. Wiring fault or module failure
57
Alert
Calibration required for discharge pressure
transducer, circuit A
Circuit cannot start — Auto.
Transducer not calibrated
58 Calibration required for discharge pressure
transducer, circuit B
Circuit cannot start — Auto.
59 Calibration required for suction pressure
transducer, circuit A
Circuit cannot start — Auto.
60 Calibration required for suction pressure
transducer, circuit B
Circuit cannot start — Auto.
61 Calibration required for oil pressure
transducer, circuit A
Circuit cannot start — Auto.
62 Calibration required for oil pressure
transducer, circuit B
Circuit cannot start — Auto.
49