English
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The following symptoms do not indicate malfunction.
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.
Discoloration of some plastic parts. • Discoloration is subject to material types used in plastic 
parts, accelerated when exposed to heat, sun light, 
UV light, or environmental factor.
Louder noise at outdoor unit during early 
operation of i AUTO-X.
• The compressor and fan rotate at higher speed to 
boost cooling performance during initial operation.
Dust may have collected around the front 
panel, grilles and wall surrounding the unit 
after extended use.
• The dust accumulation is due to air purification effect of 
negative ions from nanoe-G. Remove the dust regularly 
with a clean dampened cloth.
Check the following before calling for servicing.
Symptom Check
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.
(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 is not obstructed.
• Certain fluorescent lights may interfere with signal 
transmitter. Please consult authorised dealer.
Troubleshooting
NON SERVICEABLE CRITERIAS
TURN OFF POWER SUPPLY AND 
UNPLUG then please consult authorised 
dealer under the following conditions:
• Abnormal noise during operation.
• Water/foreign particles have entered the 
remote control.
• Water leaks from Indoor unit.
• Circuit breaker switches off frequently.
• Power cord becomes unnaturally warm.
• Switches or buttons are not functioning 
properly.
• Replace of safety devices should be 
carried out by authorised dealer.
If the unit stops and the TIMER indicator blinks, use 
the remote control to retrieve the error code.
ON
OFF
SET
TIMER
CANCEL
FF
ET
AN
E
Press for 
5 seconds
Press for 
5 seconds 
to quit 
checking
Press until you 
hear beep sound, 
then write down 
the error code
Turn the unit off 
and reveal the 
error code to 
authorised dealer
21
3
4
• 
For certain errors, you may restart the unit for limited 
operation if there are 4 beeps when operation starts.
Cleaning instructions / Troubleshooting
ACXF55-04370_YZ0517-1.indb   21ACXF55-04370_YZ0517-1.indb   21 6/2/2017   2:30:37 PM6/2/2017   2:30:37 PM