Panasonic Error Code

Diagnosis display = H00
Abnormality / Protection control = No abnormality detected
Abnormality Judgement =
Emergency operation = Normal operation
Primary location to verify =

Diagnosis display = H11
Abnormality / Protection control = Indoor / Outdoor abnormal communication
Abnormality Judgement = > 1 min after starting operation
Emergency operation = Indoor fan operation only
Primary location to verify = • Internal / external cable connections • Indoor / Outdoor PCB

Diagnosis display = H14
Abnormality / Protection control = Indoor intake air temperature sensor abnormality
Abnormality Judgement = Continue for 5 sec.
Emergency operation =
Primary location to verify = • Intake air temperature sensor (detective or disconnected)

Diagnosis display = H15
Abnormality / Protection control = Outdoor compressor temperature sensor abnormality
Abnormality Judgement = Continue for 5 sec
Emergency operation =
Primary location to verify = Compressor temperature sensor (detective or disconnected)

Diagnosis display = H16
Abnormality / Protection control = Outdoor Current Transformer open circuit
Abnormality Judgement =
Emergency operation =
Primary location to verify = • Outdoor PCB • IPM (Power transistor) module

Diagnosis display = H19
Abnormality / Protection control = Indoor fan motor mechanism locked
Abnormality Judgement = 7 times occurance continuously
Emergency operation =
Primary location to verify = • Indoor PCB • Fan motor

Diagnosis display = H23
Abnormality / Protection control = Indoor heat exchanger temperature sensor abnormality
Abnormality Judgement =
Emergency operation = O (Cooling only}
Primary location to verify = • Heat exchanger temperature sensor (detective or disconnected)

Diagnosis display = H24
Abnormality / Protection control = Indoor heat exchanger temperature sensor 2 abnormality
Abnormality Judgement = Continue for 5 sec.
Emergency operation =
Primary location to verify = • Heat exchanger temperature sensor (detective or disconnected)

Diagnosis display = H27
Abnormality / Protection control = Outdoor intake air temperature sensor abnormality
Abnormality Judgement = Continue for 5 sec.
Emergency operation = O
Primary location to verify = • Outdoor temperature sensor (detective or disconnected)

Diagnosis display = H28
Abnormality / Protection control = Outdoor heat exchanger temperature sensor abnormality
Abnormality Judgement = Continue for 5 sec.
Emergency operation = O
Primary location to verify = • Outdoor heat exchanger temperature sensor (detective or disconnected)

Diagnosis display = H30
Abnormality / Protection control = Outdoor discharge air temperature sensor abnormality
Abnormality Judgement = Continue for 5 sec.
Emergency operation =
Primary location to verify = • Outdoor temperature sensor (detective or disconnected)

Diagnosis display = H33
Abnormality / Protection control = Indoor / Outdoor wrong connection
Abnormality Judgement =
Emergency operation =
Primary location to verify = • Indoor / Outdoor supply voltage

Diagnosis display = H38
Abnormality / Protection control = Indoor / Outdoor mismatch (brand code)
Abnormality Judgement =
Emergency operation =
Primary location to verify =

Diagnosis display = H50
Abnormality / Protection control = Ventilation motor abnormality
Abnormality Judgement = 7 times occurance continuously
Emergency operation =
Primary location to verify = • Indoor PCB • Ventilation motor

Diagnosis display = H51
Abnormality / Protection control = Nozzle lock abnormality
Abnormality Judgement = 2 times occurance continuously
Emergency operation =
Primary location to verify = •Nozzle

Diagnosis display = H52
Abnormality / Protection control = Limit switch abnormality
Abnormality Judgement =
Emergency operation =
Primary location to verify = • Indoor PCB

Diagnosis display = H97
Abnormality / Protection control = Outdoor fan motor mechanism locked
Abnormality Judgement = 2 times occurance within 30 minutes
Emergency operation =
Primary location to verify = • Indoor PCB • Fan motor

Diagnosis display = H98
Abnormality / Protection control = Indoor high pressure protection
Abnormality Judgement =
Emergency operation =
Primary location to verify = • Air filter dirty • Air circulation short circuit

Diagnosis display = H99
Abnormality / Protection control = Indoor heat exchanger anti-freezing protection
Abnormality Judgement =
Emergency operation =
Primary location to verify = • Insufficient refrigerant • Air filter dirty

Diagnosis display = F11
Abnormality / Protection control = Cooling / Heating cycle changeover abnormality
Abnormality Judgement = 4 times occurance within 30 minutes
Emergency operation =
Primary location to verify = •4-way valve • V-coil

Diagnosis display = F90
Abnormality / Protection control = PFC control
Abnormality Judgement = 4 times occurance within 10 minutes
Emergency operation =
Primary location to verify = • Voltage at PFC

Diagnosis display = F91
Abnormality / Protection control = Refrigerantion cycle abnormality
Abnormality Judgement = 2 times occurance within 20 minutes
Emergency operation =
Primary location to verify = • No refrigerant (3-way valve is closed)

Diagnosis display = F93
Abnormality / Protection control = Compressor rotation failure
Abnormality Judgement = 4 times occurance within 20 minutes
Emergency operation =
Primary location to verify = •Compressor

Diagnosis display = F95
Abnormality / Protection control = Cool high pressure protection
Abnormality Judgement = 4 times occurance within 20 minutes
Emergency operation =
Primary location to verify = • Outdoor refrigerant circuit

Diagnosis display = F96
Abnormality / Protection control = IPM (power transistor) overheating protection
Abnormality Judgement = 4 times occurance within 30 minutes
Emergency operation =
Primary location to verify = • Excess refrigerant • Improper heat radiation • IPM (Power transistor)

Diagnosis display = F97
Abnormality / Protection control = Outdoor compressor overheating protection
Abnormality Judgement = 4 times occurance within 10 minutes
Emergency operation =
Primary location to verify = • Insufficient refrigerant • Compressor

Diagnosis display = F98
Abnormality / Protection control = Total running current protection
Abnormality Judgement = 3 times occurance within 20 minutes
Emergency operation =
Primary location to verify = • Excess refrigerant • Improper heat radiation

Diagnosis display = F99
Abnormality / Protection control = Outdoor Direct Current (DC) peak detection
Abnormality Judgement = 7 times occurance continuously
Emergency operation =
Primary location to verify = • Outdoor PCB • IPM (Power transistor) • Compressor

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