Panasonic CU-4E23JBE Service Manual

Also see for CU-3E18JBE: Operating instructions Operating instructions Operating instructions Operating instructions Operating instructions

Panasonic CU-4E23JBE Service Manual Manual pdf 42 page image

4215 Troubleshooting Guide15.1. Self Diagnosis Function• The display screen of wireless remote control unit and the self-diagnosis LEDs (green) on the outdoor printed circuit board in theoutdoor unit can be used to identify the location of the problem.Refer to the table below to identify and solve the cause of the problem, and then re-start the air conditioner system.• If the problem is solved and operation returns to normal.LED 1 illuminates and others LED are off.LED 6 LED 5 LED 4 LED 3 LED 2 LED 1 AbnormalityjudgementProtectionoperation Problem Check locationDiagnosisdisplayAbnormalityorprotectioncontrolH11 Indoor/outdoorabnormalcommunicationAfteroperation for1 minuteIndoor fan onlyoperation canstart byentering intoforce coolingoperationIndoor/outdoorcommunication notestablish• Indoor/outdoorwire terminal• Indoor/outdoorPCB• Indoor/outdoorconnection wireH12 Indoor unitcapacityunmatched90s afterpower supply— Total indoorcapability more thanmaximum limit orless than minimumlimit, or number ofindoor unit less thantwo.• Indoor/outdoorconnection wire• Indoor/outdoorPCB• Specification andcombination tablein catalogueH15 CompressortemperaturesensorabnormalityContinuousfor 5s— Compressortemperature sensoropen or short circuit• Compressortemperaturesensor lead wireand connectorH16 Outdoorcurrenttransformer(CT)abnormality— — Current transformerfaulty or compressorfaulty• Outdoor PCBfaulty orcompressorfaultyH27 Outdoor airtemperaturesensorabnormalityContinuousfor 5s— Outdoor airtemperature sensoropen or short circuit• Outdoor airtemperaturesensor lead wireand connectorH28 Outdoor heatexchangertemperaturesensor 1abnormalityContinuousfor 5s— Outdoor heatexchangertemperature sensor 1open or short circuit• Outdoor heatexchangertemperaturesensor 1 leadwire andconnectorH32 Outdoor heatexchangertemperaturesensor 2abnormalityContinuousfor 5s— Outdoor heatexchangertemperature sensor 2open or short circuit• Outdoor heatexchangertemperaturesensor 2 leadwire andconnectorH33 Indoor /outdoormisconnectionabnormality— — Indoor and outdoorrated voltagedifferent• Indoor andoutdoor unitscheckH36 Outdoor gaspipetemperaturesensorabnormalityContinuousfor 5sHeatingprotectionoperation onlyOutdoor gas pipetemperature sensoropen or short circuit• Outdoor gas pipetemperaturesensor lead wireand connector