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TROUBLESHOOTING TROUBLESHOOTING
Symptom
Symptom
Cause
Cause
Mist emerges from indoor unit. Condensation effect due to cooling process.
Water owing sound during operation. Refrigerant ow inside the unit.
The room has a peculiar odour. This may 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 odours.
Operation is delayed a few minutes after
restart.
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.
Indoor fan stops occasionally during heating
operation.
To avoid unintended cooling effect.
Cracking sound can be heard during
operation.
Changes of temperature cause the expansion/contraction of the unit.
Unit switch to FAN operation and air become
humid.
This happens when the room temperature reaches the set temperature,
operation switches to FAN mode and the humidity increase.
Outdoor unit emits noise during heating
operation.
This is due to changes in ow of refrigerant gas when operation stops
and starts.
Operation does not stop immediately after
pressed the OFF/ON button.
Discharging heat is in process. Operation will stops automatically after
approximately 60 seconds.
Operation stops occasionally. (“DEFROST”
appears on the remote control display)
The unit is in defrosting mode, and the melted frost is drained from the
outdoor unit.
Air ow does not start immediately after
operation is started. (“PRE HEAT” appears on
the remote control display)
The unit is warming up to provide warm air.
Operation starts after power resumes. Auto restart is in function and operates under previous setting.
During dry mode, cold air blow out.
The unit is running cooling operation with low fan speed to dehumidify
the room.
Fan speed change occasionally during heating
mode.
The room temperature has reached the remote control setting. When the
room temperature drops again, the fan speed will resume to the remote
control settings.
Outdoor unit emits steam during heating
mode.
This is due to defrost operation happens at the heat exchanger.
The following symptoms do not indicate malfunction.
The following symptoms do not indicate malfunction.
10


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