Specifications

53
Alarm/Alert Alarm Description Why was this Action taken Reset Probable
code or Alert alarm generated ? by control method cause
11 Alert Condenser leaving fluid Thermistor outside range of None. Chiller continues to run Automatic Thermistor failure, damaged
Thermistor failure of -40 to 118°C cable/wire or wiring error.
12 Alert Condenser entering fluid Thermistor outside range of None. Chiller continues to run Automatic Thermistor failure, damaged
Thermistor failure of -40 to 118°C cable/wire or wiring error.
15 Alert Compressor A1 high Thermistor outside range of Compressor A1 shut down Manual Thermistor failure, faulty motor
motor temperature -39.9 to 118°C for five cooling solenoid.
consecutive readings.
16 Alert Compressor A2 high Thermistor outside range of Compressor A2 shut down Manual Thermistor failure, faulty motor
motor temperature -39.9 to 118°C for five cooling solenoid.
consecutive readings.
17 Alert Compressor B1 high Thermistor outside range of Compressor B1 shut down Manual Thermistor failure, faulty motor
motor temperature -39.9 to 118°C for five cooling solenoid.
consecutive readings.
18 Alert Compressor B2 high Thermistor outside range of Compressor B2 shut down Manual Thermistor failure, faulty motor
motor temperature -39.9 to 118°C for five cooling solenoid.
consecutive readings.
19 Alert Circuit A low oil DGT/oil temp. less than Air-cooled chillers not Automatic Failed oil heater
temp. at start-up SCT + oil rise allowed to start
20 Alert Circuit B low oil DGT/oil temp. less than Air-cooled chillers not Automatic Failed oil heater
temp. at start-up SCT + oil rise allowed to start
21 Alert External reset Thermistor outside range Reset disabled. Automatic Thermistor failure or wiring error
temperature of -40 to 118°C Runs under normal
thermistor failure control/setpoints
22 Alert Circuit A discharge Calibration offset more than Circuit A shut down Automatic Transducer failure, power supply failure
pressure transducer 41 kPa or voltage ratio (volts or wiring damage/error.
failure read/ref. voltage) more than
99.9 % or less than 0.5 %.
23 Alert Circuit B discharge Calibration offset more than Circuit B shut down Automatic Transducer failure, power supply failure
pressure transducer 41 kPa or voltage ratio (volts or wiring damage/error.
failure read/ref. voltage) more than
99.9 % or less than 0.5 %.
24 Alert Circuit A suction Calibration offset more than Circuit A shut down Automatic Transducer failure, power supply failure
pressure transducer 41 kPa or voltage ratio (volts or wiring damage/error.
failure read/ref. voltage) more than
99.9 % or less than 0.5 %.
25 Alert Circuit B suction Calibration offset more than Circuit B shut down Automatic Transducer failure, power supply failure
pressure transducer 41 kPa or voltage ratio (volts or wiring damage/error.
failure read/ref. voltage) more than
99.9 % or less than 0.5 %.
26 Alert Comp. A1 oil Calibration offset more than Comp. A1 shut down Automatic Transducer failure, power supply failure
pressure transducer 41 kPa or voltage ratio (volts or wiring damage/error.
failure read/ref. voltage) more than
99.9 % or less than 0.5 %.
27 Alert Comp. A2 oil Calibration offset more than Comp. A2 shut down Automatic Transducer failure, power supply failure
pressure transducer 41 kPa or voltage ratio (volts or wiring damage/error.
failure read/ref. voltage) more than
99.9 % or less than 0.5 %.
28 Alert Comp. B1 oil Calibration offset more than Comp. B1 shut down Automatic Transducer failure, power supply failure
pressure transducer 41 kPa or voltage ratio (volts or wiring damage/error.
failure read/ref. voltage) more than
99.9 % or less than 0.5 %.
29 Alert Comp. B2 oil Calibration offset more than Comp. B2 shut down Automatic Transducer failure, power supply failure
pressure transducer 41 kPa or voltage ratio (volts or wiring damage/error.
failure read/ref. voltage) more than
99.9 % or less than 0.5 %.
30 Alert Circuit A economizer Calibration offset more than Circuit A shut down Automatic Transducer failure, power supply failure
transducer failure 41 kPa or voltage ratio (volts or wiring damage/error.
read/ref. voltage) more than
99.9 % or less than 0.5 %.
31 Alert Circuit B economizer Calibration offset more than Circuit B shut down Automatic Transducer failure, power supply failure
transducer failure 41 kPa or voltage ratio (volts or wiring damage/error.
read/ref. voltage) more than
99.9 % or less than 0.5 %.
32 Alarm Transducer supply Reference voltage measured Chiller shut down Automatic Power supply failure or wiring error.
outside 4.5 to 5.5 Volts at PSIO-1, less than 4.5 V Low transformer voltage.
or greater than 5.5 V.
34 Alert 4-20 mA reset input If configured and input signal Reset function disabled. Automatic Faulty signal generator, wiring error.
out of range less than 2 mA or greater Normal setpoint used.
than 20 mA.
35 Alert 4-20 mA demand limit input If configured and input signal Demand limit ignored. Automatic Faulty signal generator, wiring error.
out of range less than 2 mA or greater Runs under normal control
than 20 mA. base on 100 % demand limit
36 Alarm Loss of communication PSIO has lost communication Automatic Failed module, wiring error, failed
with “Hardware point” with one of the points in transformer, loose connection plug,
Table 18. wrong address.
37 Alert Circuit A low saturated SST reads 3.3°C or more below Circuit A shut down Manual Low refrigerant charge, plugged strainer,
suction temperature the freeze point for 3 minutes. faulty expansion valve.
Point is 1.1°C for water, setpoint Low water flow.
minus 4.4°C for brines.
38 Alert Circuit B low saturated SST reads 3.3°C or more below Circuit B shut down Manual Low refrigerant charge, plugged strainer,
suction temperature the freeze point for 3 minutes. faulty expansion valve.
Point is 1.1°C for water, setpoint Low water flow.
minus 4.4°C for brines.
Alarms and alerts codes table (cont.)