Carrier AQUASNAP AIR COOLED CHILLERS WITH COMFORTLINK CONTROLS 30RAP010-060 Operation And Service Manual

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Carrier AQUASNAP AIR COOLED CHILLERS WITH COMFORTLINK CONTROLS 30RAP010-060 Operation And Service Manual Manual pdf 67 page image

67Table 42 — Alarm and Alert CodesALARM/ALERTCODEALARMORALERTDESCRIPTIONWHY WAS THISALARMGENERATED?ACTION TAKENBY CONTROLRESETMETHODPROBABLECAUSET051 Alert Circuit A, Compressor 1FailureCompressor feedback signaldoes not match relay stateCompressor A1 shutdown. ManualHigh-pressure switch open,faulty CSB, loss of condenserair, filter drier plugged, non-condensables, operationbeyond capability.A051 Alarm Circuit A, Compressor 1FailureRespective current sensorboard (CSB) feedback signalis ON when the compressorshould be offUnit shut down Manual Welded compressor contac-tor, CSB wiring error.T052 Alert Circuit A, Compressor 2FailureCompressor feedback signaldoes not match relay stateCompressor A2 shutdown. ManualHigh-pressure switch open,faulty CSB, loss of condenserair, filter drier plugged, non-condensables, operationbeyond capability.A052 Alarm Circuit A, Compressor 2FailureRespective current sensorboard (CSB) feedback signalis ON when the compressorshould be offUnit shut down Manual Welded compressor contac-tor, CSB wiring error.T055 Alert Circuit B, Compressor 1FailureCompressor feedback signaldoes not match relay stateCompressor B1 shutdown. ManualHigh-pressure switch open,faulty CSB, loss of condenserair, filter drier plugged, non-condensables, operationbeyond capability.A055 Alarm Circuit B, Compressor 1FailureRespective current sensorboard (CSB) feedback signalis ON when the compressorshould be offUnit shut down Manual Welded compressor contac-tor, CSB wiring error.T056 Alert Circuit B, Compressor 2FailureCompressor feedback signaldoes not match relay stateCompressor B2 shutdown. ManualHigh-pressure switch open,faulty CSB, loss of condenserair, filter drier plugged, non-condensables, operationbeyond capability.A056 Alarm Circuit B, Compressor 2FailureRespective current sensorboard (CSB) feedback signalis ON when the compressorshould be offUnit shut down Manual Welded compressor contac-tor, CSB wiring error.A060 Alarm Cooler Leaving FluidThermistor Failure Thermistor outside range of–40 to 245 F (–40 to 118 C) Chiller shut downimmediately Automatic Thermistor failure, damagedcable/wire or wiring error.A061 Alarm Cooler Entering FluidThermistor Failure Thermistor outside range of–40 to 245 F (–40 to 118 C) Chiller shut downimmediately Automatic Thermistor failure, damagedcable/wire or wiring error.T068 None Circuit A Return Gas Thermistor FailureIf return gas sensors areenabled (RG.EN) andthermistor is outside range of–40 to 245 F (–40 to 118 C)Circuit A shut down Automatic Thermistor failure, damagedcable/wire or wiring error.T069 None Circuit B Return Gas Thermistor FailureIf return gas sensors areenabled (RG.EN) andthermistor is outside range of–40 to 245 F –40 to 118 C)Circuit B shut down Automatic Thermistor failure, damagedcable/wire or wiring error.T073 Alert Outside Air ThermistorFailure Thermistor outside range of–40 to 245 F (–40 to 118 C)Temperature resetdisabled. Chiller runsunder normal control/setpoints. When capacityreaches 0, cooler/pumpheaters are energized.Automatic Thermistor failure, damagedcable/wire or wiring error.T074 Alert Space Temperature/Dual ChillerThermistor FailureThermistor outside range of–40 to 245 F (–40 to 118 C)Temperature resetdisabled. Chiller runsunder normal control/setpoints.Automatic Thermistor failure, damagedcable/wire or wiring error.T077 AlertCircuit A SaturatedSuction Temperatureexceeds Cooler LeavingFluid TemperatureFaulty expansion valve,suction pressure transduceror leaving fluid thermistor.Circuit A shutdown afterpumpdown complete. AutomaticFaulty expansion valve orsuction pressure transduceror leaving fluidthermistor.T078 AlertCircuit B SaturatedSuction Temperatureexceeds Cooler LeavingFluid TemperatureFaulty expansion valve,suction pressure transduceror leaving fluid thermistor.Circuit B shutdown afterpumpdown complete AutomaticFaulty expansion valve orsuction pressure transduceror leaving fluidthermistor.T079 Alert Lead/Lag LWTThermistor FailureThermistor outside range of–40 to 245 F (–40 to 118 C)Chiller runs as a standalone machine AutomaticDual LWT thermistor failure,damaged cable/wire orwiring error.T090 Alert Circuit A DischargePressure Transducer FailureOutside of range (0 to667 psig) Circuit A shut down AutomaticTransducer failure, poorconnection to MBB, or wiringdamage/error.T091 Alert Circuit B DischargePressure Transducer FailureOutside of range (0 to667 psig) Circuit B shut down AutomaticTransducer failure, poorconnection to MBB, or wiringdamage/error.T092 Alert Circuit A SuctionPressure Transducer Failure Outside of range (0 to 420psig) Circuit A shut down AutomaticTransducer failure, poorconnection to MBB, or wiringdamage/error.T093 AlertCircuit B SuctionPressure TransducerFailureOutside of range (0 to420 psig) Circuit B shut down AutomaticTransducer failure, poorconnection to MBB, or wiringdamage/error.T094 Alert Discharge GasThermistor FailureDischarge thermistor (DTT) iseither open or shortedDigital compressor shutdown. Automatic Thermistor failure, damagedcable/wire or wiring error.