Panasonic air conditioner error codes

The self-diagnostics system of the air conditioners by Panasonic displays error codes on the display of the infrared remote control and on the wall-mounted remote control. The list of error codes, their interpretation, and the troubleshooting methods for each error code are specified.

Panasonic inverter air conditioner error codes

CodesProblemSolution
S01Room temperature sensor failureRefer to detailed diagnostic
S02Indoor coil sensor failureCheck sensor for continuity
S03Humidity sensor failureReplace indoor board
S04Comp. temperature sensor failureCheck sensor for continuity
S05Outdoor coil sensor failureCheck sensor for continuity
S06Outdoor air sensor failureCheck sensor for continuity
S07Outdoor current sensor failureReplace outdoor board
E01Indoor/outdoor communication failureRefer to detailed diagnostics
E02HIC circuit failure (Compressor/Fan circuit)Refer to detailed diagnostics
E03Outdoor unit OTP rom failureRefer to detailed diagnostics
E04Peak current cut offRefer to detailed diagnostics
E05PAM or Active circuit failureRefer to detailed diagnostics
E06High compressor discharge temperatureRefer to detailed diagnostics
E07Indoor fan operating failureRefer to detailed diagnostics
E084 way valve switching failure (RV)Refer to detailed diagnostics
E09No refrigerant protectionRefer to detailed diagnostics
E10DC compressor drive circuit failureRefer to detailed diagnostics
E11Outdoor fan operating failureRefer to detailed diagnostics
E12Error in outdoor unitRefer to detailed diagnostics
E13Freeze prevention activatedRefer to detailed diagnostics

Diagnosis displayAbnormality / Protection control Abnormality JudgementEmergency operation Primary location to verify
H00No abnormality detected-Normal operation-
H11Indoor / Outdoor abnormal communication> 1 min after starting operationIndoor fan operation only• Internal / external cable connections
• Indoor / Outdoor PCB
H12Connection capability rank abnormal---
H14Indoor intake air temperature sensor abnormalityContinue for 5 sec.-• Intake air temperature sensor (detective or disconnected)
H15Outdoor compressor temperature sensor abnormalityContinue for 5 sec-Compressor temperature sensor (detective or disconnected)
H16Outdoor Current Transformer open circuit--• Outdoor PCB
• IPM (Power transistor) module
H19Indoor fan motor mechanism locked7 times occurance continuously-• Indoor PCB
• Fan motor
H23Indoor heat exchanger temperature sensor abnormality-O (Cooling only)• Heat exchanger temperature sensor (detective or disconnected)
H24Indoor heat exchanger temperature sensor 2 abnormalityContinue for 5 sec.-• Heat exchanger temperature sensor (detective or disconnected)
H27Outdoor intake air temperature sensor abnormalityContinue for 5 sec.O• Outdoor temperature sensor (detective or disconnected)
H28Outdoor heat exchanger temperature sensor abnormalityContinue for 5 sec.O• Outdoor heat exchanger temperature sensor (detective or disconnected)
H30Outdoor discharge air temperature sensor abnormalityContinue for 5 sec.-• Outdoor temperature sensor (detective or disconnected)
H33Indoor / Outdoor wrong connection--• Indoor / Outdoor supply voltage
H38Indoor / Outdoor mismatch (brand code)---
H50Ventilation motor abnormality7 times occurance continuously-• Indoor PCB • Ventilation motor
H51Nozzle lock abnormality2 times occurance continuously-•Nozzle
H52Limit switch abnormality--• Indoor PCB
H97Outdoor fan motor mechanism locked2 times occurance within 30 minutes-• Indoor PCB • Fan motor
H98Indoor high pressure protection--• Air filter dirty • Air circulation short circuit
H99Indoor heat exchanger anti-freezing protection--• Insufficient refrigerant
• Air filter dirty
F11Cooling / Heating cycle changeover abnormality4 times occurance within 30 minutes-•4-way valve
• V-coil
F90PFC control4 times occurance within 10 minutes-• Voltage at PFC
F91Refrigerantion cycle abnormality2 times occurance within 20 minutes-• No refrigerant (3-way valve is closed)
F93Compressor rotation failure4 times occurance within 20 minutes-• Compressor
F95Cool high pressure protection4 times occurance within 20 minutes-• Outdoor refrigerant circuit
F96IPM (power transistor) overheating protection4 times occurance within 30 minutes-• Excess refrigerant
• Improper heat radiation
• IPM (Power transistor)
F97Outdoor compressor overheating protection4 times occurance within 10 minutes-• Insufficient refrigerant
• Compressor
F98Total running current protection3 times occurance within 20 minutes-• Excess refrigerant
• Improper heat radiation
F99Outdoor Direct Current (DC) peak detection7 times occurance continuously-• Outdoor PCB
• IPM (Power transistor)
• Compressor