Carrier 38GXC Installation Instructions Manual

Also see for 38GXC: Owner's manual Owner's manual Product data Service manual

Contents

11TROUBLESHOOTINGThis unit has onboard diagnostics. Error codes will appear on the LED display on the front panel of the indoor unit in place of thetemperature display. Error codes are also displayed on the outdoor unit microprocessor board with colored LED lights. The table belowexplains the error codes for both units.38GXC/GXQ -- 40GXC/GXQ 009--024 Diagnostic CodesEquipment FaultCode Displayedon Indoor UnitFront PanelLED Display on Outdoor Unit BoardPossible CauseGreenLEDNumberof FlashesRedLEDNumberof FlashesYellowLEDNumberof FlashesFreeze Protection, Indoor Coil E2 4 3 Low Refrigerant Charge, Blocked Indoor AirFlow, or Dirty Air FilterHigh Compressor Discharge Temperature E4 7 Low Refrigerant Charge, Blocked Capillary,or High Ambient TemperatureLow Voltage Protection E5 5 Low VoltageCommunication Error E6 0 Wiring Error, or Communication FailureIndoor Air Temperature Thermistor F1 Bad Connection, or Sensor FailureIndoor Coil Temperature Thermistor F2 Bad Connection, or Sensor FailureOutdoor Air Temperature Thermistor F3 6 Bad Connection, or Sensor FailureOutdoor Coil Temperature Thermistor F4 5 Bad Connection, or Sensor FailureCompressor Discharge Line Thermistor F5 7 Bad Connection, or Sensor FailureDefrost H1 2 Unit going through normal defrost cycleCompressor Overload Protection H3 8 Low Refrigerant Charge, Blocked Capillary,or Compressor Motor FailureCompressor Over Current Protection H4 6 High Ambient Temperature, or Loss ofCondenser AirflowIPM Module Protection H5 4 Loss of Cooling to Heat Sink, High Ambient,Low Voltage, or Bad Connections38/40GXC(Q)

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