Troubleshooting for Single and Multi Zone LV Systems

Air does not come out

In HEAT operation

• The air conditioner is warming up. Wait for about 1 to 4 minutes.
• During defrosting operation, hot air does not fl ow out of the indoor unit.

When the air conditioner operates immediately after the circuit breaker is turned on

• The air conditioner is preparing to operate. Wait for about 3 to 20 minutes.

The air conditioner does not operate. (OPERATION lamp is off.)

• Is a breaker off or a fuse blown?     
• Is there a power failure?   
• Are batteries set in the remote controller?   
• Is the timer setting correct?

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.

Operation stopped suddenly. (OPERATION lamp flashes.)

• Are the air filters clean? Clean the air filters.
• Is there anything to block the air inlet or the outlet of the indoor and the outdoor units? 
• Turn the bleaker off and take all obstacles away. Then turn it on again and try operating the air conditioner with the remote controller. If the lamp still fl ashes, call the service shop where you purchased 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.
• 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.

Mist comes out of the indoor unit

• This happens when the air in the room is cooled into mist by the cold airflow during COOL operation.      
• This is because the air in the room is cooled by the heat exchanger and becomes mist during defrosting operation.

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 airflow direction set appropriately?

Remote controller does not work properly

• No remote controller signals are displayed. 
• Remote controller sensitivity is low. „    
• Display is low in contrast or blacked out.
• Display runs out of control.

The batteries are dying and the remote controller is malfunctioning. Replace all the batteries with new, size AAA.LR03 (alkaline).

HEAT operation cannot be selected, even though the unit is heat pump model

• Slide the DIP switch to the left as shown in the illustration so that the HEAT operation can be selected with the
  “MODE” button.

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 deactivate the settings in the WEEKLY TIMER.

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 gives out odor

• This happens when smells of the room, furniture, or cigarettes are absorbed into the unit and discharged with the airflow.
• (If this happens, have the indoor unit washed by a technician from the service shop where you purchased 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.