Panasonic Air Conditioner Error Codes

Diagnosis display = H00
Abnormality / Protection control = No abnormality detected
Emergency operation = Normal operation

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.
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
Primary location to verify = Compressor temperature sensor (detective or disconnected)

Diagnosis display = H16
Abnormality / Protection control = Outdoor Current Transformer open circuit
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
Primary location to verify = Indoor PCB • Fan motor

Diagnosis display = H23
Abnormality / Protection control = Indoor heat exchanger temperature sensor abnormality
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.
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.
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.
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.
Primary location to verify = Outdoor temperature sensor (detective or disconnected)

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

Diagnosis display = H38
Abnormality / Protection control = Indoor / Outdoor mismatch (brand code)

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

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

Diagnosis display = H52
Abnormality / Protection control = Limit switch abnormality
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
Primary location to verify = Indoor PCB • Fan motor

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

Diagnosis display = H99
Abnormality / Protection control = Indoor heat exchanger anti-freezing protection
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
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
Primary location to verify = Voltage at PFC

Diagnosis display = F91
Abnormality / Protection control = Refrigerantion cycle abnormality
Abnormality Judgement = 2 times occurance within 20 minutes
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
Primary location to verify = Compressor

Diagnosis display = F95
Abnormality / Protection control = Cool high pressure protection
Abnormality Judgement = 4 times occurance within 20 minutes
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
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
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
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
Primary location to verify = Outdoor PCB • IPM (Power transistor) • Compressor

 

Panasonic Inverter AC Error Codes

Error Codes	Cause
S01	Room temperature sensor failure
S02	Indoor coil sensor failure
S03	Humidity sensor failure
S04	Comp. temperature sensor failure
S05	Outdoor coil sensor failure
S06	Outdoor air sensor failure
S07	Outdoor current sensor failure
E01	Indoor/outdoor communication failure
E02	HIC circuit failure (Compressor/Fan circuit)
E03	Outdoor unit OTP rom failure
E04	Peak current cut off
E05	PAM or Active circuit failure
E06	High compressor discharge temperature
E07	Indoor fan operating failure
E08	Way valve switching failure (RV)
E09	No refrigerant protection
E10	DC compressor drive circuit failure
E11	Outdoor fan operating failure
E12	Error in outdoor unit
E13	Freeze prevention activated

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Panasonic Cassette AC Error Codes

E06: Outdoor unit failed to receive serial communication signals from indoor unit

E07: Outdoor unit sending failure to indoor unit

E12: Automatic address setting start is prohibited while auto-address setting in progress.

E14: Main unit duplication in simultaneous-operation multi control (detected outdoor unit)

E15: Automatic address alarm (capacity too low)

E16: Automatic address alarm (capacity too high)

E20: No indoor units connected

F04: Compressor discharge temperature sensor (TD) trouble

F06: Inlet temperature sensor (C1) in heat exchanger trouble

F07: Intermediate temperature (C2) in heat exchanger trouble

F08: Outdoor air temperature sensor (TO) trouble

F12: Compressor inlet suction temperature sensor (TS) trouble

F31: Outdoor unit nonvolatile memory (EEPROM) trouble

H01: Primary (input) overcurrent detected

H02: PAM trouble

H03: Primary current CT sensor (current sensor) failure

H05: Sensor failure, Compressor discharge temperature sensor (TD) disconnected

H31: HIC trouble

L04: Outdoor unit address duplication

L10: Outdoor unit capacity not set

L13: Indoor unit type setting error

L18: 4-way valve operation failure

P03: Compressor discharge temperature trouble

P04: High pressure trouble

P05: AC power supply trouble

P13: Alarm valve open

P14: O2 sensor detect

P15: Insufficient gas level detected

P16: Compressor overcurrent trouble

P22: Outdoor unit fan motor trouble

P29: Lack of INV compressor wiring, INV compressor actuation failure (including locked) due to DCCT failure

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Panasonic Air Conditioner Troubleshooting

The following symptoms do not indicate malfunction.

Symptom: Mist emerges from indoor unit.

Cause: Condensation effect due to cooling process

Symptom: Water fl owing sound during operation.

Cause:  Refrigerant fl ow inside the unit.

Symptom: The room has a peculiar odour

Cause: This may be due to damp smell emitted by the wall, carpet, furniture or clothing

Symptom: Indoor fan stops occasionally during automatic fan speed setting.

Cause:  This helps to remove the surrounding odour

Symptom: Airflow continues even after operation has stopped

Cause:  Extraction of remaining heat from the indoor unit (maximum 30 seconds).

Symptom: Operation is delayed a few minutes after restarting

Cause:  The delay is a protection to the unit’s compressor.

Symptom: Outdoor unit emits water/steam

Cause:  Condensation or evaporation occurs on pipes

Symptom: POWER indicator blinks during HEAT mode with no warm air supply (and louver is closed)

Cause: The unit is in defrost mode (and AIR SWING is set to AUTO).

Symptom: Indoor fan stops occasionally during heating operation.

Cause: To avoid unintended cooling effect

Symptom: POWER indicator blinks before the unit is switched on.

Cause:  This is a preliminary step in preparation for the operation when the ON timer has been set

Symptom: Cracking sound during operation

Cause: Changes of temperature caused the expansion/contraction of the unit

Symptom: POWER indicator blinks 3 seconds ON and 0.5 seconds OFF during operation

Cause: The unit is in Demand Response Mode

Check: the following before calling for servicing

Symptom: Operation in HEAT/COOL mode is not working efficiently

Check:

• Set the temperature correctly.
• Close all doors and windows.
• Clean or replace the fi lters.
• Clear any obstruction at the air inlet and air outlet vents

Symptom: Noisy during operation

Check:

• Check if the unit has been installed at an incline
• Close the front panel properly

Symptom: Remote control does not work

Check:

• Insert the batteries correctly
• Replace weak batteries

Symptom: The unit does not work

Check:

• Check if the circuit breaker is tripped.
• Check if timers have been set

Symptom: The unit does not receive the signal from the remote control.

Check:

• Make sure the receiver is not obstructed.
• Certain fl uorescent lights may interfere with signal transmitter. Please consult authorised dealer

The unit stops and the TIMER indicator blinks

Panasonic VRF AC Error Codes and Troubleshooting

Panasonic AC Manual PDF

Panasonic Cassette Air Conditioner MANUAL PDF