Panasonic WH-MHF12G9E8 Service Manual

Also see for WH-MHF09G3E8: Planning and installation manual Service manual Operating instructions

88Diagnosis display Abnormality/Protection control Abnormality Judgement Primary location to verifyF37 Indoor water inlet temperature sensorabnormality Continue for 5 sec.  Water inlet temperature sensor(defective or disconnected)F40 Outdoor discharge pipe temperaturesensor abnormality Continue for 5 sec.  Outdoor discharge pipe temperaturesensor (defective or disconnected)F41 PFC control 4 times occurrence within 10minutes  Voltage at PFCF42 Outdoor heat exchanger temperaturesensor abnormality Continue for 5 sec.  Outdoor heat exchanger temperaturesensor (defective or disconnected)F43 Outdoor defrost sensor abnormality Continue for 5 sec.  Outdoor defrost sensor (defective ordisconnected)F45 Indoor water outlet temperature sensorabnormality Continue for 5 sec.  Water outlet temperature sensor(defective or disconnected)F46 Outdoor Current Transformer opencircuit — Insufficient refrigerant Outdoor PCB Compressor lowF48 Outdoor EVA outlet temperature sensorabnormality Continue for 5 sec.  Outdoor EVA outlet temperature sensor(defective or disconnected)F49 Outdoor bypass outlet temperaturesensor abnormality Continue for 5 sec.  Outdoor bypass outlet temperaturesensor (defective or disconnected)F95 Cooling high pressure overloadprotection — Outdoor high pressure sensor Water pump or water leakage Clogged expansion valve or strainer Excess refrigerant Outdoor PCB