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The following symptoms do not indicate malfunction.
Symptom Cause
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.
When ON Timer is set, the unit may start earlier (up
to 35 minutes) before the actual set time in order to
achieve the desired temperature on time.
POWER indicator blinks during HEAT mode
with no warm air supply (and fl ap is closed).
• The unit is in defrost mode.
POWER indicator blinks and stop when
operate COOL/DRY mode.
• The system has locked to operate in HEAT mode only.
TIMER indicator is always on. • The timer setting repeats daily once set.
Operation is delayed a few minutes after
restarting.
• The delay is a protection to the unit’s compressor.
Indoor fan stops occasionally during heating
operation.
• To avoid unintended cooling effect.
Indoor fan stops occasionally during automatic
fan speed setting.
• This helps to remove the surrounding odour.
The room has a peculiar odour. • This may be due to damp smell emitted by the wall,
carpet, furniture or clothing.
Cracking sound during operation. • Changes of temperature caused the expansion/
contraction of the unit.
Water fl owing sound during operation. • Refrigerant fl ow inside the unit.
Mist emerges from indoor unit. • Condensation effect due to cooling process.
Outdoor unit emits water/steam. • Condensation or evaporation occurs on pipes.
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.
Dusts accumulated on the wall. • Due to air circulation or static electricity generated
by the air conditioner. Some types of wall paper may
collect dusts easily (recommended to clean the area
around the air conditioner frequently).
Check the following before calling for servicing.
Symptom Check
Operation in HEAT/COOL mode is not working
effi ciently.
• Set the temperature correctly.
• Close all doors and windows.
• Clean or replace the fi lters.
• 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 fl uorescent lights may interfere with signal
transmitter. Please consult authorised dealer.
Troubleshooting
Cleaning Instruction / Troubleshooting
ACXF55-19350.indb 21ACXF55-19350.indb 21 1/29/2018 8:30:05 AM1/29/2018 8:30:05 AM
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