Inverter air troubleshooting

To find out, whether your Inverter air conditioner is experiencing a major failure or just a minor malfunction, refer to the table below. Find the symptom in the first column and analyze the explanations provided next to it. Using this information, you will be capable of making the right decision as to whether you need professional help or can deal with the problem on your own.

CaseExplanation
Operation does not start soon.
- When ON/OFF button was pressed soon after operation was stopped.
- When the mode was reselected.
- This is to protect the air conditioner. You should wait for about 3 minutes.
Hot air does not flow out soon after the start of heating operation.- The air conditioner is warming up. You should wait for 1 to 4 minutes. (The system is designed to start discharging air only after it has reached a certain temperature.)
The heating operation stops suddenly and a flowing sound is heard.- The system is taking away the frost on the outdoor unit. You should wait for about 4 to 12 minutes.
The outdoor unit emits water or steam.- In HEAT mode
- The frost on the outdoor unit melts into water or steam when the air conditioner is in defrost operation.
- In COOL or DRY mode
- Moisture in the air condenses into water on the cool surface of outdoor unit piping and drips.
Mist comes out of the indoor unit.- This happens when the air in the room is cooled into mist by the cold airflow during cooling operation.
- This is because the air in the room is cooled by the heat exchanger and becomes mist during defrost operation.
The indoor unit gives out odour.- This happens when smells of the room, furniture, or cigarettes are absorbed into the unit and discharged with the airflow. (If this happens, we recommend you to have the indoor unit washed by a technician. Consult the sen/ice shop where you bought the air conditioner.)
The outdoor fan rotates while the air conditioner is not in operation.- After operation is stopped:
- The outdoor fan continues rotating for another 60 seconds for system protection.
- While the air conditioner is not in operation:
- When the outdoor temperature is very high, the outdoor fan starts rotating for system protection.
The operation stopped suddenly. (OPERATION lamp is on.)- For system protection, the air conditioner may stop operating on a sudden large voltage fluctuation. It automatically resumes operation in about 3 minutes.
No remote controller signals are displayed.
The remote controller sensitivity is low. The display is low in contrast or blacked out.
The display runs out of control.
- The batteries are dying and the remote controller is malfunc- tioning. Replace all the batteries with new size AAA alkaline batteries.
- If the reset button is provided, press the reset button after the batteries are replaced.
The ON/OFF TIMER does not operate according to the settings.- Check if the ON/OFF TIMER and the WEEKLY TIMER are set to the same time. Change or disable the settings in the WEEKLY TIMER
The air conditioner does not operate. (OPERATION lamp is off.)- Hasn’t a breaker turned OFF or a fuse blown?
- Isn’t it a power failure?
- Are batteries set in the remote controller?
- Is the timer setting correct?
Cooling (Heating) effect is poor.- Are the air filters clean?
- Is there anything to block the air inlet or the outlet of the indoor and the outdoor units?
- Is the temperature setting appropriate?
- Are the windows and doors closed?
- Are the airflow rate and the air direction set appropriately?
Operation stops suddenly. (OPERATION lamp flashes.)- Are the air filters clean?
- Is there anything to block the air inlet or the outlet of the indoor and the outdoor units? Clean the air filters or take all obstacles away and turn the breaker OFF. Then turn it ON again and try operating the air conditioner with the remote controller. If the lamp still flashes, call the service shop where you bought the air conditioner.
- Are operation modes all the same for indoor units connected to outdoor units in the multi system? If not. set all indoor units to the same operation mode and confirm that the lamps flash. Moreover, when the operation mode is in “AUTO”, set all indoor unit operation modes to “COOL” or “HEAT for a moment and check again that the lamps are normal. If the lamps stop flashing after the above steps, there is no malfunction.
An abnormal functioning happens during operation.- The air conditioner may malfunction with lightning or radio waves. Turn the breaker OFF. turn it ON again and try operating the air conditioner with the remote controller.
The indoor unit comes to a stop or does not operate when the heat pump model is selected. The remote controller allows selection of “heating” even though the unit is cooling only model.- Unless the air conditioner has a heating function, the unit in cooling, dry. or fan operation comes to a stop if the heating mode is selected. If the heating mode is selected and the Run button is pressed while the unit is not in operation, the unit does not start operating. Check the specifications of the outdoor unit. If the outdoor unit is cooling only model, set the remote controller for a cooling only model using the cooling only/heat pump switch on the remote controller, If you are not sure about how to switch the setting, contact the service shop where you bought the air conditioner.
Heating cannot be selected, even though the unit is heat pump model.- Set the remote controller so that it is for a heat pump model by using the cooling only/heat pump switch on the remote controller. If you are not sure about how to switch the setting, contact the service shop where you bought the air conditioner.

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