
20
Troubleshooting
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 (and AIR SWING is set to AUTO).
POWER indicator blinks and stops 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.
Cooling/heating capacity reduced during the lowest fan
speed setting.
• The low fan speed is low noise priority operation, so cooling/
heating capacity may be reduced (depending on the condition).
Increase the Fan Speed to increase the capacity.
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.
Air
fl
ow continues even after operation has stopped.
• Extraction of remaining heat from the indoor unit
(maximum 30 seconds).
During deice operation,
fl
ap is closed.
• The AIR SWING is set to AUTO.
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.
Soft buzzing sound from indoor unit during
nanoe™X operation.
• It is normal when nanoe™X generator is working. If you have
concern about the sound, cancel the nanoe™X operation.
Wireless LAN LED stays ON during unit turn OFF.
• Unit’s LAN connection with the router is activated.
Check the following before calling for servicing.
Symptom
Check
Operation in HEAT/COOL mode is not working
ef
fi
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.
nanoe™X indicator at the indoor unit is not lit
when nanoe™X is activated.
• Use the remote control to retrieve error code and consult
authorised dealer.