Carrier 30GTN Service And Troubleshooting Manual

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Table 27 — Alarm and Alert CodesALARM/ALERTCODEALARMORALERT DESCRIPTION WHY WAS THISALARMGENERATED?ACTION TAKENBY CONTROL RESETMETHOD PROBABLECAUSE51 Alert Circuit A, Compressor 1Failure Compressor feedbacksignal does not matchrelay stateCircuit A shut down. Manual High-pressure or loss-of-charge switch open, faultycontrol relay or CPCSboard, loss of condenserair, liquid valve closed, op-eration beyond capability.52 Alert Circuit A, Compressor 2Failure Compressor feedbacksignal does not matchrelay stateCircuit A shut down.Circuit restarted in 1minute. CompressorA2 not used until alarmis reset.Manual High-pressure switch open,faulty control relay or CPCSboard, loss of condenserair, liquid valve closed, op-eration beyond capability.53 Alert Circuit A, Compressor 3Failure Compressor feedbacksignal does not matchrelay stateCircuit A shut down.Circuit restarted in 1minute. CompressorA3 not used until alarmis reset.Manual High-pressure switch open,faulty control relay or CPCSboard, loss of condenserair, liquid valve closed, op-eration beyond capability.54 Alert Circuit A, Compressor 4Failure Compressor feedbacksignal does not matchrelay stateCircuit A shut down.Circuit restarted in 1minute. CompressorA4 not used until alarmis reset.Manual High-pressure switch open,faulty control relay or CPCSboard, loss of condenserair, liquid valve closed, op-eration beyond capability.55 Alert Circuit B, Compressor 1Failure Compressor feedbacksignal does not matchrelay stateCircuit B shut down. Manual High-pressure or loss-of-charge switch open, faultycontrol relay or CPCSboard, loss of condenserair, liquid valve closed, op-eration beyond capability.56 Alert Circuit B, Compressor 2FailureCompressor feedbacksignal does not matchrelay stateCircuit B shut down.Circuit restarted in 1minute. CompressorB2 not used until alarmis reset.Manual High-pressure switch open,faulty control relay or CPCSboard, loss of condenserair, liquid valve closed, op-eration beyond capability.57 Alert Circuit B, Compressor 3FailureCompressor feedbacksignal does not matchrelay stateCircuit B shut down.Circuit restarted in 1minute. CompressorB3 not used until alarmis reset.Manual High-pressure switch open,faulty control relay or CPCSboard, loss of condenserair, liquid valve closed, op-eration beyond capability.60 Alarm Cooler Leaving FluidThermistor Failure (T1)Thermistor outsiderange of −40 to 245 F(−40 to 118 C)Chiller shutdown afterpumpdown complete.Automatic Thermistor failure, damagedcable/wire or wiring error.61 Alarm Cooler Entering FluidThermistor Failure (T2)Thermistor outsiderange of −40 to 245 F(−40 to 118 C)Chiller shutdown afterpumpdown complete.Automatic Thermistor failure, damagedcable/wire or wiring error.64 Alert Circuit A Saturated Con-densing Thermistor Fail-ure (T3)Thermistor outsiderange of −40 to 245 F(−40 to 118 C)Circuit A shutdownafter pumpdown com-plete. (EXV only)Automatic Thermistor failure, damagedcable/wire or wiring error.65 Alert Circuit B Saturated Con-densing Thermistor Fail-ure (T4)Thermistor outsiderange of −40 to 245 F(−40 to 118 C)Circuit B shutdownafter pumpdowncomplete.Automatic Thermistor failure, damagedcable/wire or wiring error.66 Alert Circuit A Saturated Suc-tion Thermistor Failure(T5)Thermistor outsiderange of −40 to 245 F(−40 to 118 C)Circuit A shutdownafter pumpdown com-plete. (EXV only)Automatic Thermistor failure, damagedcable/wire or wiring error.67 Alert Circuit B Saturated Suc-tion Thermistor Failure(T6)Thermistor outsiderange of −40 to 245 F(−40 to 118 C)Circuit B shutdownafter pumpdowncomplete.Automatic Thermistor failure, damagedcable/wire or wiring error.68 Alert Compressor A1 SuctionGas Thermistor Failure(T7)Thermistor outsiderange of −40 to 245 F(−40 to 118 C)Circuit A shutdownafter pumpdown com-plete. (EXV only).Automatic Thermistor failure, damagedcable/wire or wiring error.69 Alert Compressor B1 SuctionGas Thermistor Failure(T8)Thermistor outsiderange of −40 to 245 F(−40 to 118 C)Circuit B shutdownafter pumpdown com-plete. (EXV only).Automatic Thermistor failure, damagedcable/wire or wiring error.73 Alert Outside Air ThermistorFailure (T9) Thermistor outsiderange of −40 to 245 F(−40 to 118 C)Temperature reset dis-abled. Chiller runs un-der normal control/setpoints.Automatic Thermistor failure, damagedcable/wire or wiring error.74 Alert Space TemperatureThermistor Failure (T10) Thermistor outsiderange of −40 to 245 F(−40 to 118 C)Temperature reset dis-abled. Chiller runs un-der normal control/setpoints.Automatic Thermistor failure, damagedcable/wire or wiring error.77 Alert Circuit A SaturatedSuction Temperatureexceeds Cooler LeavingFluid TemperatureSaturated suction isgreater than leavingfluid temperature formore than 5 minutesCircuit A shutdownafter pumpdowncomplete.Automatic Faulty expansion valve orEXV board, faulty coolersuction thermistor (T5) orleaving fluid thermistor (T1).78 Alert Circuit B SaturatedSuction Temperatureexceeds Cooler LeavingFluid TemperatureSaturated suction isgreater than leavingfluid temperature formore than 5 minutesCircuit B shutdownafter pumpdowncompleteAutomatic Faulty expansion valve orEXV board, faulty coolersuction thermistor (T6) orleaving fluid thermistor (T1).48