DC Inverter Multi VRF System
30
6 Common Malfunctions and Troubleshooting
(1) If there is a noticeable malfunction (e.g. unpleasant smell, or unusual noise), turn unit off and disconnect
power immediately. Then contact qualified service center. If unit continues operation, it may get damaged and
lead to electric shock or fire hazard.
(2)
Do not repair the air conditioner by yourself. Improper maintenance may lead electric shock or fire hazard.
●
Please check the items below before calling for maintenance.
Problems
Causes
What to do
Unit doesn
’
t work.
Fuse or circuit breaker is cut off.
Replace fuse or reset the circuit
breaker.
Power failure
Restart unit when power is
restored.
Power is not connected.
Connect the power.
Remote controller
’
s battery is dead
Replace new battery.
Remote controller is out of the control range.
Control range is within
8m(26feet).
Unit runs but stops
immediately.
Air inlet or air outlet of indoor and outdoor units is
blocked.
Clear obstructions.
Unit not cooling or heating
properly
Air inlet or air outlet of indoor and outdoor units is
blocked.
Clear obstructions.
Improper temp setting
Adjust setting at remote
controller or wired controller
Fan speed is set too low.
Adjust setting at remote
controller or wired controller
Air flow direction is not correct.
Adjust setting at remote
controller or wired controller
Door or window is open.
Close the door or window.
Direct sunshine
Draw curtain or louver.
Too many people in the room.
Too many heat sources in the room.
Reduce heat sources.
Filter is blocked or dirty.
Clean the filter
NOTICE!
If problem cannot be solved after checking the above items, please contact a
qualified service center and describe the cases and models.
●
Following circumstances are not malfunctions.
Malfunction
Reason
Unit doesn
’
t run.
Unit starts up immediately after it is
turned off.
Overload protection switch makes it run after a
3-min delay.
Power is just turned on.
Standby operation lasts for about 1min.
Mist comes from
the unit.
Under cooling
Indoor air with high humidity is cooled rapidly.
Noise is emitted.
Slight cracking sound is heard when unit
is just turned on.
It is the noise when electronic expansion valve is
initialized.
There is repeating sound when cooling.
It is the sound for gas refrigerant flowing in the
unit.
There is sound when unit starts or stops.
It is the sound when gas refrigerant stops
flowing.
There is slight and repeating sound
when unit is running or after running.
This is the sound of drainage operation.
Cracking sound is heard when unit is
running or after running.
This is the sound caused by the expansion of
panel and other parts of the unit due to
temperature change.
Unit blows out
dust.
Unit starts up after not operating for a
long time.
Dust in indoor unit is blown out.
Unit emits odor.
Under operation
Unit absorbs the room odor and then blows it
out.
