Panasonic WH-MHF09G3E5 Service Manual

Also see for WH-MHF09G3E5: Planning and installation manual Planning and installation manual Operating instructions Service manual

Contents

8316.4 Error Codes TableDiagnosis display Abnormality/Protection control Abnormality Judgement Primary location to verifyH00 No abnormality detected — —H12 Indoor/Outdoor capacity unmatched 90s after power supply Indoor/outdoor connection wire Indoor/outdoor PCB Specification and combination table incatalogueH15 Outdoor compressor temperature sensorabnormality Continue for 5 sec.  Compressor temperature sensor(defective or disconnected)H20 Water pump abnormality Continue for 10 sec.  Indoor PCB Water pump (malfunction)H23 Indoor refrigerant liquid temperaturesensor abnormality Continue for 5 sec.  Refrigerant liquid temperature sensor(defective or disconnected)H27 Service valve error Continue for 5 minutes  High pressure sensor (defective ordisconnected)H42 Compressor low pressure abnormality — Outdoor pipe temperature sensor Clogged expansion valve or strainer Insufficient refrigerant Outdoor PCB CompressorH62 Water flow switch abnormality Continue for 1 min.  Water flow switchH63 Refrigerant low pressure abnormality 4 times occurrence within20 minutes Outdoor low pressure sensor (defectiveor disconnected)H64 Refrigerant high pressure abnormality Continue for 5 sec.  Outdoor high pressure sensor(defective or disconnected)H65 Deice water circulation abnormality Continue for 10 sec. Water flow switch sensor (defective ordisconnected) Water pump malfunction Buffer tank (is used)H70 Back-up heater OLP abnormality Continue for 60 sec.  Back-up heater OLP(Disconnection or activated)H72 Tank sensor abnormal Continue for 5 sec.  Tank sensorH76 Indoor - remote control communicationabnormality —  Indoor - control panel(defective or disconnected)H90 Indoor/outdoor abnormal communication > 1 min after starting operation  Internal/external cable connections Indoor/Outdoor PCBH91 Tank heater OLP abnormality Continue for 60 sec.  Tank heater OLP(Disconnection or activated)H95 Indoor/Outdoor wrong connection —  Indoor/Outdoor supply voltageH98 Outdoor high pressure overloadprotection — Outdoor high pressure sensor Water pump or water leakage Clogged expansion valve or strainer Excess refrigerant Outdoor PCBH99 Indoor heat exchanger freeze prevention —  Indoor heat exchanger Refrigerant shortageF12 Pressure switch activate 4 times occurrence within 20minutes  Pressure switchF14 Outdoor compressor abnormal revolution 4 times occurrence within 20minutes  Outdoor compressorF15 Outdoor fan motor lock abnormality 2 times occurrence within 30minutes Outdoor PCB Outdoor fan motorF16 Total running current protection 3 times occurrence within 20minutes Excess refrigerant Outdoor PCBF20 Outdoor compressor overheatingprotection4 times occurrence within 30minutes Compressor tank temperature sensor Clogged expansion valve or strainer Insufficient refrigerant Outdoor PCB CompressorF22 IPM (power transistor) overheatingprotection3 times occurrence within 30minutes Improper heat exchange IPM (Power transistor)F23 Outdoor Direct Current (DC) peakdetection7 times occurrencecontinuously Outdoor PCB CompressorF24 Refrigeration cycle abnormality 2 times occurrence within 20minutes Insufficient refrigerant Outdoor PCB Compressor low compressionF25 Cooling/Heating cycle changeoverabnormality4 times occurrence within 30minutes 4-way valve V-coilF27 Pressure switch abnormality Continue for 1 min.  Pressure switch