Specifications
54
Alarm/Alert Alarm Description Why was this Action taken Reset Probable
code or Alert alarm generated ? by control method cause
40 Alert Compressor A1 low Oil pressure differential Comp. A1 shut down Manual Low water temperature, plugged oil filter,
oil pressure below oil Setpoint 1 or 2 closed oil valve, bad oil solenoid,
(see low oil pressure Alert compressor oil check valve stuck,
Criteria and Setpoints) plugged oil strainer
41 Alert Compressor A2 low Oil pressure differential Comp. A2 shut down Manual Low water temperature, plugged oil filter,
oil pressure below oil Setpoint 1 or 2 closed oil valve, bad oil solenoid,
(see low oil pressure Alert compressor oil check valve stuck,
Criteria and Setpoints) plugged oil strainer
42 Alert Compressor B1 low Oil pressure differential Comp. B1 shut down Manual Low water temperature, plugged oil filter,
oil pressure below oil Setpoint 1 or 2 closed oil valve, bad oil solenoid,
(see low oil pressure Alert compressor oil check valve stuck,
Criteria and Setpoints) plugged oil strainer
43 Alert Compressor B2 low Oil pressure differential Comp. B2 shut down Manual Low water temperature, plugged oil filter,
oil pressure below oil Setpoint 1 or 2 closed oil valve, bad oil solenoid,
(see low oil pressure Alert compressor oil check valve stuck,
Criteria and Setpoints) plugged oil strainer
44 Alarm Circuit A condenser For W/C chillers only, if Chiller shut down. Automatic Failed/bad discharge pressure
freeze protection SCT < 1.1°C Turn cond. pump on if transducer, refrigerant leak
chiller is off
45 Alarm Circuit B condenser For W/C chillers only, if Chiller shut down. Automatic Failed/bad discharge pressure
freeze protection SCT < 1.1°C Turn cond. pump on if transducer, refrigerant leak
chiller is off
46 Alarm Cooler freeze protection Cooler EWT or LWT less Chiller shut down. Automatic Faulty thermistor, low water flow.
than freeze point. Freeze point Leave cond. pump on.
is 1.1°C for water, cooling Turn cond. pump on if chiller
setpoint minus 4.4°C for brines is off.
47 Alert Circuit A high saturated After first 90 seconds Circuit A shut down. Manual Faulty expansion valve, liquid level
suction temperature SST > 12.8°C and EXV < 1 %. sensor or transducer
48 Alert Circuit B high saturated After first 90 seconds Circuit B shut down. Manual Faulty expansion valve, liquid level
suction temperature SST > 12.8°C and EXV < 1 %. sensor or transducer
49 Alarm Loss of condenser flow Flow switch not closed Chiller shut down. Manual Low condenser water flow condenser
within 1 minute after pump pump.
is started
50 Alarm Illegal configuration Illegal configuration has been Chiller cannot start. Manual Configuration error.
x entered. Correction needed
51 Alarm Initial configuration No configuration has been Chiller cannot start. Manual Configuration omitted.
required entered.
52 Alarm Unit is in emergency stop CCN command received Chiller shut down. CCN/Automatic Network command.
to shut unit down.
53 Alarm Cooler pump interlock Interlock did not close Chiller shut down. Automatic Failure of cooler pump or controls.
failed at start-up within 1 minute after transition Pump turned off.
54 Alarm Cooler pump interlock Interlock opened for at least Chiller shut down. Automatic Failure of cooler pump or controls.
opened unexpectedly 5 seconds during operation Pump turned off.
55 Alarm Cooler pump interlock Interlock closed when pump Cooler pump remains off. Manual Failure of cooler pump relay or
closed when pump off relay is off Unit prevented from starting. interlock, welded contacts.
56 Alert Loss of communication No communications have WSM forces removed. Automatic Failed module, wiring error, failed
with WSM been received by PSIO Runs under own control. transformer, loose connection plug,
within 5 minutes of last wrong address.
transmission.
57 Alert Circuit A liquid level Sensor reads 118°C or -40°C Runs, but controls EXV Automatic Thermistor circuit open, faulty
sensor failure with SST > -12.8°C. based on discharge superheat liquid level sensor, wiring error.
58 Alert Circuit B liquid level Sensor reads 118°C or -40°C Runs, but controls EXV Automatic Thermistor circuit open, faulty
sensor failure with SST > -12.8°C. based on discharge superheat liquid level sensor, wiring error.
59 Alarm Compressor A1 Oil pump did not build Circuit cannot start. Manual Low oil, oil pump failure, oil solenoid
Prestart oil pressure sufficient pressure during failure, oil transducer failure.
pre-lube cycle.
60 Alarm Compressor A2 Oil pump did not build Circuit cannot start. Manual Low oil, oil pump failure, oil solenoid
Prestart oil pressure sufficient pressure during failure, oil transducer failure.
pre-lube cycle.
61 Alarm Compressor B1 Oil pump did not build Circuit cannot start. Manual Low oil, oil pump failure, oil solenoid
Prestart oil pressure sufficient pressure during failure, oil transducer failure.
pre-lube cycle.
62 Alarm Compressor B2 Oil pump did not build Circuit cannot start. Manual Low oil, oil pump failure, oil solenoid
Prestart oil pressure sufficient pressure during failure, oil transducer failure.
pre-lube cycle.
63 Alarm Circuits A&B off for alerts Control has shut down None. Automatic Check individual alarms.
Unit down both circuits due to alerts.
64 Alert Circuit A loss of charge Discharge pressure reading Circuit A shut down. Manual Refrigerant leak or transducer failure.
< 69 kPa for 30 seconds
65 Alert Circuit B loss of charge Discharge pressure reading Circuit B shut down. Manual Refrigerant leak or transducer failure.
< 69 kPa for 30 seconds
66 Alarm Loss of communication No communications have been FSM forces removed. Automatic Wiring faulty or module failure.
with FSM received by PSIO within Runs under own control.
5 minutes of last transmission.
Alarms and alerts codes table (cont.)