Panasonic Air Conditioner Error Codes

AC BrandsPanasonic
Error CodeCause
S01Room temperature sensor failure
S02Indoor coil sensor failure
S03Humidity sensor failure
S04Comp. temperature sensor failure
S05Outdoor coil sensor failure
S06Outdoor air sensor failure
S07Outdoor current sensor failure
E01Indoor/outdoor communication failure
E02HIC circuit failure (Compressor/Fan circuit)
E03Outdoor unit OTP rom failure
E04Peak current cut off
E04PAM or Active circuit failure
E05High compressor discharge temperature
E06Indoor fan operating failure
E07Way valve switching failure (RV)
E08No refrigerant protection
E09DC compressor drive circuit failure
E10Outdoor fan operating failure
E11Error in outdoor unit

Panasonic Air Conditioner Troubleshooting

Panasonic Air Conditioner Troubleshooting
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


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

Symptom: Remote control does not work


  • Insert the batteries correctly
  • Replace weak batteries

Symptom: The unit does not work


  • 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.


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

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