Carrier Air Conditioner Operation And Service Manual

Also see for Air Conditioner: Owner's guide Owner's manual

49Table 29 — Alarm and Alert CodesALARM/ALERTCODEALARMORALERTDESCRIPTIONWHY WAS THISALARMGENERATED?ACTION TAKENBY CONTROLRESETMETHODPROBABLECAUSET051 Alert Circuit A, Compressor 1FailureCompressor feedback signaldoes not match relay stateCircuit A shut down. Manual High-pressure or loss-of-charge switch open, faultycontrol relay or CPCS board,loss of condenser air, liquidvalve closed, operationbeyond capability.T052 Alert Circuit A, Compressor 2FailureCompressor feedback signaldoes not match relay stateCircuit A shut down. Circuitrestarted in 1 minute. Com-pressor A2 not used untilalarm is reset.Manual High-pressure switch open,faulty control relay or CPCSboard, loss of condenser air,liquid valve closed, opera-tion beyond capability.T053 Alert Circuit A, Compressor 3FailureCompressor feedback signaldoes not match relay stateCircuit A shut down. Circuitrestarted in 1 minute. Com-pressor A3 not used untilalarm is reset.Manual High-pressure switch open,faulty control relay or CPCSboard, loss of condenser air,liquid valve closed, opera-tion beyond capability.T054 Alert Circuit A, Compressor 4FailureCompressor feedback signaldoes not match relay stateCircuit A shut down. Circuitrestarted in 1 minute. Com-pressor A4 not used untilalarm is reset.Manual High-pressure switch open,faulty control relay or CPCSboard, loss of condenser air,liquid valve closed, opera-tion beyond capability.T055 Alert Circuit B, Compressor 1FailureCompressor feedback signaldoes not match relay stateCircuit B shut down. Manual High-pressure or loss-of-charge switch open, faultycontrol relay or CPCS board,loss of condenser air, liquidvalve closed, operationbeyond capability.T056 Alert Circuit B, Compressor 2Failure Compressor feedback signaldoes not match relay state Circuit B shut down. Circuitrestarted in 1 minute. Com-pressor B2 not used untilalarm is reset.Manual High-pressure switch open,faulty control relay or CPCSboard, loss of condenser air,liquid valve closed, opera-tion beyond capability.T057 Alert Circuit B, Compressor 3Failure Compressor feedback signaldoes not match relay state Circuit B shut down. Circuitrestarted in 1 minute. Com-pressor B3 not used untilalarm is reset.Manual High-pressure switch open,faulty control relay or CPCSboard, loss of condenser air,liquid valve closed, opera-tion beyond capability.A060 Alarm Cooler Leaving FluidThermistor Failure (T1)Thermistor outside range of–40 to 245 F (–40 to 118 C)Chiller shutdown afterpumpdown complete.Automatic Thermistor failure, damagedcable/wire or wiring error.A061 Alarm Cooler Entering FluidThermistor Failure (T2) Thermistor outside range of–40 to 245 F (–40 to 118 C) Chiller shutdown afterpumpdown complete. Automatic Thermistor failure, damagedcable/wire or wiring error.T064 Alert Circuit A Saturated Con-densing Thermistor Failure(T3)Thermistor outside range of–40 to 245 F (–40 to 118 C) Circuit A shutdown afterpumpdown complete. Automatic Thermistor failure, damagedcable/wire or wiring error.T065 Alert Circuit B Saturated Con-densing Thermistor Failure(T4)Thermistor outside range of–40 to 245 F (–40 to 118 C) Circuit B shutdown afterpumpdown complete. Automatic Thermistor failure, damagedcable/wire or wiring error.T066 Alert Circuit A Saturated SuctionThermistor Failure (T5) Thermistor outside range of–40 to 245 F (–40 to 118 C) Circuit A shutdown afterpumpdown complete.(EXV only)Automatic Thermistor failure, damagedcable/wire or wiring error.T067 Alert Circuit B Saturated SuctionThermistor Failure (T6) Thermistor outside range of–40 to 245 F (–40 to 118 C) Circuit B shutdown afterpumpdown complete.(EXV only).Automatic Thermistor failure, damagedcable/wire or wiring error.T068 Alert Compressor A1 SuctionGas Thermistor Failure (T7) Thermistor outside range of–40 to 245 F (–40 to 118 C) Circuit A shutdown afterpumpdown complete.(EXV only).Automatic Thermistor failure, damagedcable/wire or wiring error.T069 Alert Compressor B1 SuctionGas Thermistor Failure (T8) Thermistor outside range of–40 to 245 F (–40 to 118 C) Circuit B shutdown afterpumpdown complete.(EXV only).Automatic Thermistor failure, damagedcable/wire or wiring error.T073 Alert Outside Air ThermistorFailure (T9)Thermistor outside range of–40 to 245 F (–40 to 118 C)Temperature reset disabled.Chiller runs under normalcontrol/set points.Automatic Thermistor failure, damagedcable/wire or wiring error.T074 Alert Space TemperatureThermistor Failure (T10)Thermistor outside range of–40 to 245 F (–40 to 118 C)Temperature reset disabled.Chiller runs under normalcontrol/set points.Automatic Thermistor failure, damagedcable/wire or wiring error.T077 Alert Circuit A SaturatedSuction Temperatureexceeds Cooler LeavingFluid TemperatureSaturated suction isgreater than leaving fluidtemperature for more than5 minutesCircuit A shutdown afterpumpdown complete.Automatic Faulty expansion valve orEXV board, faulty cooler suc-tion thermistor (T5) or leav-ing fluid thermistor (T1).T078 Alert Circuit B SaturatedSuction Temperatureexceeds Cooler LeavingFluid TemperatureSaturated suction isgreater than leaving fluidtemperature for more than5 minutesCircuit B shutdown afterpumpdown completeAutomatic Faulty expansion valve orEXV board, faulty cooler suc-tion thermistor (T6) or leav-ing fluid thermistor (T1).T079 Alert Lead/Lag Thermistor Failure Thermistor outside range of–40 to 245 F (–40 to 118 C)Lead/lag algorithm runsusing Master LWT sensorMaster is lead chiller.Automatic Dual chiller LWT thermistorfailure, damaged cable/wireor wiring error.