Panasonic air conditioner troubleshooting


Whatever symptom your air conditioner is experiencing or not turning on, turn to the tables below for expert advice on troubleshooting the appliance. The tables were made by the engineers from the Panasonic Corporation as a source of information both for technicians and users. Some of the solutions can be tried by a person without special training, while others require professional help or at least relevant experience.

Panasonic CW-XC54HK air troubleshooting

Problem Possible Causes What To Do
Air conditioner does not start ■ The air conditioner is unplugged. • Make sure the air conditioner plug is pushed completely into the outlet.
■ The fuse is blown/circuit breaker is tripped. • Check the house fuse/circuit breaker box and replace the fuse or reset the breaker.
■ Power failure. • When power is restored, wait 3 minutes to restart the air conditioner to prevent tripping of the compressor overload.
Air conditioner does not cool as it should ■ Airflow is restricted. • Make sure there are no curtains, blinds, or furniture blocking the front of the air conditioner.
■ TEMP Control set to a higher number. • Set the TEMP Control to a lower number.
■ The air filter is dirty. • Clean the filter at least every 2 weeks.
■ The room may have been hot. • When the air conditioner is first turned on you need to allow time for the room to cool down.
■ Cold air is escaping. • Check for open furnace floor registers and cold air returns.
• Set the air conditioner’s vent to the closed position.
■ Cooling coils have iced up. • See Air Conditioner Freezing Up below.
Air conditioner freezing up ■ Ice blocks the air flow and stops the air conditioner from cooling the room. • Set the mode control at High Fan at a high temperature.

PANASONIC S-36MU1E51 air troubleshooting

Symptom Cause
Sound like streaming water during operation or after operation • Sound of refrigerant liquid flowing inside unit
• Sound of drainage water through drain pipe
Cracking noise during operation or when operation stops. Cracking sound due to temperature changes of parts
Discharged air is smelled during operation. Indoor odor components, cigarette odor and cosmetic odor accumurated in the air conditioner and its air is discharged. Unit inside is dusty. Consult your dealer.
Dewdrop gets accumurated near air discharge during operation Indoor moisture is cooled by cool wind and accumulated by dewdrop.
Fog occurs during operation in cooling mode. (Places where large amounts of oil mist exist at restaurants.) • Cleaning is necessary because unit inside (heat exchanger) is dirty. Consult your dealer as technical engineering is required.
• During defrost operation
Fan is rotating for a while even though operation stops. • Fan rotating makes operation smoothly.
• Fan may sometimes rotates because of drying heat exchanger due to settings.
Wind-direction changes while operating. Wind-direction setting cannot be made. Wind-direction cannot be changed. • When air discharge temperature is low or during defrost operation, horizontal wind flow is made automatically.
• Flap position is occasionally set up individually.
When wind-direction is changed, flap operates several times and stops at designated position. When wind-direction is changed, flap operates after searching for standard position.
Dust Dust accumulation inside indoor unit is discharged.
At the initial high-speed operation, the fan may sometimes rotate faster (for 3 to 30 minutes) than the setting speed. This is for operation check in order to confirm whether the fan motor rotation is within use range.
When power is turned ON instantly. Operation is not acticated for the first approx. 3 minutes because compressor protection circuit is activated.
When operation is stopped and resumed immediately.
Noise often occurs in heating mode. During defrost operation
Steam often occurs in heating mode.
When stopped by remote controller, outdoor unit fan is sometimes operating for a while even though outdoor compressor is stopped. Fan rotating makes operation smoothly.

Symptom Cause Remedy
Air conditioner does not run at all although power is turned on. Power failure or after power failure Press ON/OFF operation button on remote control unit again.
Operation button is turned off. • Switch on power if breaker is turned off.
• If breaker has been tripped, consult your dealer without turning it on.
Fuse blow out. If blown out, consult your dealer.
Poor cooling or heating performance Air intake or air discharge port of indoor and outdoor units is clogged with dust or obstacles. Remove dust or obstruction.
Wind speed switch is set to “Low”. Change to “High” or “Strong”.
Improper temperature settings
Room is exposed to direct sunlight in cooling mode.
Doors and /or windows are open.
Air filter is clogged.
Too much heat sources in room in cooling mode. Use minimum heat sources and in a short time.
Too many people in room in cooling mode. Reduce temperature settings or change to “High” or “Strong”.

Panasonic S-26PU1U6 air troubleshooting

Trouble Possible Cause Remedy
Air conditioner does not run at all. 1. Power failure 1. Restore power.
2. Leakage circuit breaker has tripped. 2. Contact service center.
3. Line voltage is too low. 3. Consult your electrician or dealer.
4. Operation button is turned off. 4. Press the button again.
5. The wireless remote controller or heat pump is malfunctioning. 5. Consult your dealer.
6. Batteries in wireless remote controller have run down. 6. Replace batteries.
Compressor runs but soon stops. 1. Obstruction in front of condenser coil (Outdoor Unit) 1. Remove obstruction.
Poor cooling (or heating) performance 1. Dirty or clogged air filter 1. Clean the air filter to improve the airflow.
2. Heat source or many people in room 2. Eliminate heat source if possible.
3. Doors and/or windows are open. 3. Shut them to keep the heat (or cold) out.
4. Obstacle near air intake or air discharge port 4. Remove it to ensure good airflow.
5. Thermostat is set too high for cooling (or too low for heating). 5. Set the temperature lower (or higher).
6. (Outdoor temperature is too low). 6. (Try to use a back-up heater.)
7. (Defrosting system does not work.) 7. (Consult your dealer.)
Lamps on the indoor unit are flashing. 1. Trouble in wiring system 1. Contact service center.

Panasonic Indoor Unit CS-S9PKR air troubleshooting

Symptom Cause
Mist emerges from indoor unit. •Condensation effect due to cooling process.
Water flowing sound during operation. • Refrigerant flow inside the unit.
The room has a peculiar odour. •This may be due to damp smell emitted by the wall, carpet, furniture or clothing.
Indoor fan stops occasionally during automatic fan speed setting. •This helps to remove the surrounding odour.
Operation is delayed a few minutes after restarting. • The delay is a protection to the unit’s compressor.
Outdoor unit emits water/steam. •Condensation or evaporation occurs on pipes.
TIMER indicator is always on. •The timer setting repeats daily once set.
POWER indicator blinks before the unit is switched on. •This is a preliminary step in preparation for the operation when the ON timer has been set.
Cracking sound during operation. •Changes of temperature caused the expansion/ contraction of the unit.
POWER indicator blinks 3 seconds ON and 0.5 seconds OFF during operation. •The unit is in Demand Response Mode.
Operation in COOL mode is not working efficiently. • Set the temperature correctly.
• Close all doors and windows.
• Clean or replace the filters.
• Clear any obstruction at the air inlet and air outlet vents.
Noisy during operation. •Check if the unit has been installed at an incline.
• Close the front panel properly.
Remote control does not work. • Insert the batteries correctly.
(Display is dim or transmission signal is weak.) • Replace weak batteries.
The unit does not work. • Check if the circuit breaker is tripped. •Check if timers have been set.
The unit does not receive the signal from the remote control. • Make sure the receiver is not obstructed.
• Certain fluorescent lights may interfere with signal transmitter. Please consult authorised dealer.

Panasonic CS-F14DB4E5 air troubleshooting

Symptom ChecK
Heating/Cooling operation is not working efficiently. • Set the temperature correctly.
• Close all doors and windows.
• Clean or replace the filters.
• Clear any obstruction at the air inlet and air outlet vents.
Heating mode cannot be operated. • The unit is forced to operate at cooling mode only in a non-living room, such as a computer room.
Noisy during operation. • Check if the unit has been installed at an incline or the intake grille is not closed properly.
Remote control does not work. (Wireless remote control display is dim or transmission signal is weak.) • Insert the batteries correctly.
• Replace weak batteries.
The unit does not work. • Check if the circuit breaker is tripped.
• Check if timers have been set.
The unit does not receive the signal from the remote control. • Make sure the receiver not obstructed.
• Make sure the address is set correctly.
• Make sure the remote control signal transmission is within the range.
• Certain fluorescent lights may interfere with signal transmitter. Please consult your nearest dealer.

Panasonic CW-XC51LE air troubleshooting

Trouble Check Result Cause Remedy
Fan Motor and Compressor won’t run. 1. Supply Voltage.
2. Fuse box or Circuit Breaker.
3. Power cord or wiring harness.
4. Temp. Settinq.
Less than 10% by rated.
Open Contacts.
Pulled loose or shorted.
Higher than room temperature.
Costumer restarted unit immidiatelly without waiting 3 minutes. Consult to an electician. Repair open circuit. Wait for 3 minute. Repair or replace it. Set it to lower.
Fan Motor won’t run 1. Objects around fan.
2. Resistance between wires.
3. Capacitor Fan Motor.
Locked fan.
Shorted/Open circuit. Ohm Meter doesn’t deflect.
Fan hitting cowling of foreign materials. Frozen Bearings. Shorted or burned out.
Capacitor defect.
Adjust fan position setting. Remove foreign materials.
Replace wires.
Replace capacitor fan motor.
Compressor won’t run (Fan motor runs). 1. Temperature setting.
2. Resistance between terminal and the compressor body.
3. Resistance between terminals.
4. Overload Protector (OLP).
5. Capacitor Compressor.
Higher than room temperature. Shorted.
Infinity between terminals. Ohm Meter doesn’t deflect.
Winding coil touch to the body Rare shorted or burn out.
Overload Protector (OLP) broken. Capacitor defect.
Set it to lower.
Replace compressor.
Replace compressor terminals.
Replace Overload Protector. Replace capacitor compres- sor.
Insufficient Cooling 1. Thermostat setting.
2. Air filter dirty.
3. Location of installation.
4. Evaporator/Condenser coil obstructed.
5. Unit capacity to small or room to big.
6. Temperature and current difference.
Higher than room temperature. Clogged or dirty.
Sunlight hitting outdoor side obstacles.
Clogged or dirty.
Not satisfied.
Restricted air circulation. Restricted heat exchanger. Restricted heat exchanger.
Restricted air circulation.
Leakage of refrigerant or refrigerant systems is blocked.
Set it to lower.
Clean or replace air filter. Consider to build an awning. Remove obstacle or reinstall unit.
Clean by steam cleaner.
Replace the unit with bigger capacity.
Locate and repair leak. Flush refrigeration cycle.
Noise 1. Source of noise. Vibration. Intermitten noise. Faulty installation.
Fan hitting object.
Refrigerant tubing touching each other.
Fan splash Drain water.
Reinstall unit or reinforce the installation.
Adjust fan position or remove foreign materials.
About 1/2″ Clearance.
Set the drain outlet downward, so that the drain water can run off.
Water Dripping 1. Unit installation.
2. Drain Tray-styrofoam pieces blocking drain channel.
Tilted to inside the room. Clogged. Restricted run off. Clogged or blocked. Tilt unit to out side slightly, remove the foreign materials.