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Trane 4TWV8X24A1 troubleshooting and error codes

These codes are matched from manufacturer documentation to this model's series or control platform. Keep checks visible and safe; do not open electrical, refrigerant, gas, combustion, or sealed equipment compartments.

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Source-backed code set

75 matched codes

CodeMeaningSystem areaPriority
Err 18.04Internal control failureOutdoor variable-speed controlUrgent
Err 67.00Ambient temperature sensor faultOutdoor ambient sensorService
Err 67.01Coil temperature sensor faultOutdoor coil sensorService
Err 67.03External temperature sensor faultExternal temperature sensorService
Err 67.04Discharge temperature sensor fault in coolingCompressor discharge sensorService
Err 67.05Discharge temperature sensor fault in heatingCompressor discharge sensorService
Err 67.06Suction temperature sensor fault in coolingSuction temperature sensorService
Err 67.07Suction temperature sensor fault in heatingSuction temperature sensorService
Err 67.08Compressor discharge sensor not attachedCompressor discharge sensorService
Alert 68.00Defrost fault ADefrost operationUrgent
Alert 68.01Defrost fault B or CDefrost operationService
Alert 68.02Combined defrost faultsDefrost operationUrgent
Alert 80.00High pressure short lockoutPressure safety circuitUrgent
Err 80.01High pressure hard lockoutPressure safety circuitUrgent
Alert 80.02High pressure reduced-capacity restartPressure safety circuitUrgent
Err 88.01Ground fault lockoutDrive and grounding circuitUrgent
Err 90.02Communication busy faultSystem communicationUrgent
Err 91.02System communication lossSystem communicationService
Err 91.03System clock communication lossSystem communicationService
Alert 106.01External shutdown switch openExternal shutdown circuitService
Alert 114.00Personality module data errorPersonality moduleUrgent
Err 114.03Personality module missingPersonality moduleUrgent
Alert 114.04Personality module unit data errorPersonality moduleUrgent
Err 114.05Personality module memory errorPersonality moduleUrgent
Err 114.06Personality module bad or missingPersonality moduleUrgent
Err 155.02Outdoor EEV motor faultElectronic expansion valveUrgent
Alert 156.01System low-charge faultRefrigerant circuitUrgent
Err 159.05Outdoor display communication errorUnit bus communicationService
Alert 164.02Outdoor EEV migrated openElectronic expansion valveUrgent
Alert 164.03Outdoor EEV migrated closedElectronic expansion valveUrgent
Alert 165.01Low superheat faultRefrigerant circuitUrgent
Alert 166.01Low superheat with EEV closedRefrigerant circuitUrgent
Alert 172.01Display assembly key faultDisplay assemblyService
Err 174.00Suction pressure sensor faultSuction pressure transducerUrgent
Err 175.00Limp-along mode activeVariable-speed protection modeUrgent
Err 175.01Limp-along lockoutVariable-speed protection modeUrgent
Err 176.00Drive communication lockoutCompressor drive communicationUrgent
Alert 177.00Drive current derateCompressor drive currentUrgent
Err 177.01Extended drive current derateCompressor drive currentUrgent
Alert 177.02Software current cutoutCompressor drive currentUrgent
Alert 177.03Hardware current cutoutCompressor drive currentUrgent
Alert 177.04Repeated current lockoutCompressor drive currentUrgent
Alert 177.05Outdoor fan current cutoutOutdoor fan driveUrgent
Alert 178.00DC bus overvoltage cutoutDrive voltageUrgent
Alert 178.01DC bus undervoltage cutoutDrive voltageUrgent
Alert 178.02Repeated DC overvoltage lockoutDrive voltageUrgent
Alert 179.02Rectifier temperature lockoutPower module temperatureUrgent
Alert 179.05Inverter temperature lockoutPower module temperatureUrgent
Alert 179.06Fan power module temperature faultOutdoor fan power moduleUrgent
Alert 180.02Low supply voltage cutoutSupply voltageUrgent
Alert 180.03High power cutoutSupply voltage and drive loadUrgent
Alert 181.00Gate drive cutoutCompressor drive hardwareUrgent
Alert 181.02Compressor phase lossCompressor motor circuitUrgent
Alert 181.04Locked rotor detectionCompressor motor circuitUrgent
Alert 181.07Repeated gate drive lockoutCompressor drive hardwareUrgent
Alert 181.08Drive configuration errorDrive configurationUrgent
Alert 181.09Compressor motor not detectedCompressor motor circuitUrgent
Alert 182.00Compressor startup soft lockoutCompressor startupUrgent
Alert 182.01Compressor startup hard lockoutCompressor startupUrgent
Alert 182.02Compressor failed to reach startup speedCompressor startupUrgent
Alert 183.00Compressor shutdown faultCompressor shutdownUrgent
Alert 184.00Indoor coil freeze protectionProtection algorithmUrgent
Alert 184.01High discharge temperature protection at high speedProtection algorithmUrgent
Alert 184.03Low suction pressure protection in coolingProtection algorithmUrgent
Alert 184.04Low suction pressure protection in heatingProtection algorithmUrgent
Alert 184.08Universal hard lockoutProtection algorithmUrgent
Alert 184.09Internal lubrication failureCompressor protectionUrgent
Alert 184.10Switchover valve mode mismatchReversing valve operationUrgent
Alert 187.00Evacuation mode activeService modeService
Alert 187.01Drive diagnostic test activeService modeService
Alert 188.06Bad configurationDrive configurationUrgent
Alert 188.11Outdoor fan communication faultOutdoor fan communicationUrgent
Alert 189.01Board temperature cutoutOutdoor control board temperatureUrgent
Alert 191.00Outdoor fan phase lossOutdoor fan motorUrgent
Alert 191.01Outdoor fan rotation faultOutdoor fan motorUrgent