Panasonic CS-E18SD3UAW service manual - Page 70

15.4 Error Codes Table Diagnosis display Abnormality / Protection control H00 No abnormality detected H11 Indoor/outdoor abnormal communication H12 Connection capability rank abnormal H14 Indoor intake air temperature sensor abnormality H15 Outdoor compressor temperature sensor abnormality H16 Outdoor Current Transformer open circuit Abnormality Judgment ─ > 1 min. after starting operation ─ Continue for 5 sec. Continue for 5 sec. ─ H19 Indoor fan motor mechanism lock ─ H21 Indoor float switch operation abnormal H23 Indoor heat exchanger temperature sensor 1 abnormality H24 Indoor heat exchanger temperature sensor 2 abnormality H27 Outdoor air temperature sensor abnormality ─ Continue for 5 sec. Continue for 5 sec. Continue for 5 sec. H28 Outdoor heat exchanger temperature sensor abnormality Continue for 5 sec. H30 Discharge temperature sensor abnormality H32 Outdoor heat exchanger temperature sensor 2 abnormality H34 Outdoor heat sink temperature sensor abnormality H35 Indoor drain water adverse current abnormal Continue for 5 sec. Continue for 5 sec. Continue for 2 sec. ─ H36 Gas pipe temperature sensor abnormality Continue for 5 sec. H37 Outdoor liquid pipe temperature sensor abnormality Continue for 2 sec. H39 Abnormal indoor operating unit or standby units ─ H41 Wiring or piping connection abnormality 3 minutes after compressor start up H97 Outdoor Fan Motor lock abnormality 2 times occurrence within 30 minutes H98 Indoor high pressure protection ─ H99 Indoor heat exchanger anti-freezeing protection F11 Cooling / Heating cycle changeover abnormality ─ 4 times occurrence within 30 minutes F17 Indoor unit freezing error 3 times occurrence within 30 minutes F90 PFC control 4 times occurrence within 10 minutes F91 Refrigeration cycle abnormality 2 times occurrence within 20 minutes F93 Outdoor compressor abnormal revolution 4 times occurrence within 20 minutes F95 Cool high pressure protection 4 times occurrence within 20 minutes F96 IPM (power transistor) overheating protection ─ F97 Outdoor compressor overheating protection 4 times occurrence within 20 minutes Emergency Operation Normal operation Indoor fan operation only ─ ─ ─ ─ ─ ─ O (Cooling only) ─ O Primary location to verify ─  Internal/external cable connections  Indoor/Outdoor PCB ─  Intake air temperature sensor (defective or disconnected)  Compressor temperature sensor (defective or disconnected)  Outdoor PCB  IPM (Power transistor) module  Indoor PCB  Fan motor ─  Heat exchanger temperature sensor 1 (defective or disconnected)  Heat exchanger temperature sensor 2 (defective or disconnected)  Outdoor temperature sensor (defective or disconnected) O  Outdoor heat exchanger temperature sensor (defective or disconnected) ─  Discharge temperature sensor ─  Discharge pipe temperature sensor (defective or disconnected). ─  Outdoor heat sink temperature sensor (defective or disconnected). ─ ─ ─  Gas pipe temperature sensor (defective or disconnected). ─  Outdoor liquid pipe temperature sensor (defective or disconnected). ─ ─ ─ ─ ─  Outdoor PCB  Outdoor Fan Motor ─  Air filter dirty  Air circulation short circuit ─  Insufficient refrigerant  Air filter dirty ─  4-way valve  V-coil  Expansion valve leakage ─  Indoor unit pipe temperature sensor (check for changes in characteristics and check its resistance) ─  Voltage at PFC ─  No refrigerant (3-way valve is closed) ─  Outdoor compressor ─  Outdoor refrigerant circuit  Excess refrigerant ─  Improper heat radiation  IPM (Power transistor) ─  Insufficient refrigerant  Compressor 70