Carrier 40GRQ Installation Instruction

Also see for 38GRQ: Owner's manual Owner's manual

Contents

13TROUBLESHOOTINGThis unit has on- board diagnostics. Error codes appear on the LED display on the front panel of the indoor unit in place of the temperaturedisplay. Error codes are also displayed on the outdoor unit microprocessor board with colored LED lights. The table below explains the errorcodes for both units.Table 7—Diagnostic CodesDisplay table for error statusError name Error definition Error code displayFreon recovery mode Operation status is displayed immediately FoMalfunction of indoor fan Malfunction of hardware H6Malfunction of middle temperature sensor of indoor evaporator Malfunction of hardware F2Malfunction of indoor ambient temperature sensor Malfunction of hardware F1Communication malfunction between indoor unit and outdoor unit Malfunction of hardware E6Malfunction of jumper cap Malfunction of hardware C5Limit/decrease frequency due to module current protection Display through adjustment with remote controller EnLimit/decrease frequency due to module temperature protection Display through adjustment with remote controller EULimit/decrease frequency due to overload protection Display through adjustment with remote controller F6Limit/decrease frequency due to freeze prevention protection Display through adjustment with remote controller FHLimit/decrease frequency due to discharge protection Display through adjustment with remote controller F9Limit/decrease frequency due to AC current protection of outdoor unit Display through adjustment with remote controller F8Malfunction overload temperature sensor Malfunction of hardware FEMalfunction of outdoor discharge temperature Malfunction of hardware F5Malfunction of outdoor ambient temperature sensor Malfunction of hardware F3Malfunction of outdoor condenser temperature sensor Malfunction of hardware F4Circuit malfunction of module temperature sensor Malfunction of hardware P7Overload protection of compressor Other malfunction H3Discharge protection Other malfunction E4Overload protection Other malfunction E8AC current protection of outdoor unit Other malfunction E5Module current protection Other malfunction H5Module temperature protection Other malfunction P8Freeze prevention protection Other malfunction E2High power protection Other malfunction L9Lacking/inverse phase protection of compressor Other malfunction U2PFC current malfunction Other malfunction HCHigh DC bus bar voltage protection Other malfunction PHLow DC bus bar voltage protection Other malfunction PLFreon-lacking protection Other malfunction FOMode shock Malfunction of hardware E7Non-matching between indoor unit and outdoor unit Malfunction of hardware LPRead-write malfunction of memory chip Malfunction of hardware EEAbnormal changeover for 4-way valve Malfunction of hardware U7Malfunction of outdoor fan 2 Malfunction of hardware LAMalfunction of outdoor fan 1 Malfunction of hardware L3Low pressure protection Other malfunction E3High pressure protection Other malfunction E1Drop malfunction of DC bus bar voltage Other malfunction U3Current detection malfunction for the complete unit Malfunction of hardware U5Charing malfunction for capacity Malfunction of hardware PUPhase current detection malfunction of compressor Malfunction of hardware U1De synchronizing of compressor Other malfunction H7Demagnetizing protection of compressor Other malfunction HEFailure start up of compressor Other malfunction LcHigh peak current of compressor Other malfunction P5Conglutination malfunction of relay of refrigerant electric heater of OU Malfunction of hardware A2Refrigerator heater of outdoor unit is invalid Display through adjustment with remote controller A3Malfunction of temperature sensor of refrigerant heater Malfunction of hardware A4Malfunction exit tube temperature sensor for condenser Malfunction of hardware A5Oil return Display through adjustment with remote controller F7Nominal cooling and heating (capacity test code) Operation status is displayed immediately P1Maximum cooling and heating (capacity test code) Operation status is displayed immediately P2Medium cooling and heating (capacity test code) Operation status is displayed immediately P3Minimum cooling and heating (capacity test code) Operation status is displayed immediately PO

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