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7 Troubleshooting
Check the points described below before requesting repair.
Symptom Cause
It is not a malfunction.
Outdoor unit
• White, misty, cold air or water comes
out
• The fan of the outdoor unit is automatically
stopped and defrosting is performed.
• Sometimes the noise of air leaking is
heard.
• The solenoid valve works when defrosting starts
or stops.
• A noise is heard when the power is
turned on.
• The outdoor unit is preparing for running.
Indoor unit
• Sometimes a swishing is heard. • When the unit starts running, during operation,
or immediately after the unit stops running, a
sound such as water fl owing may be heard,
or the operation sound may become louder
for a couple of minutes immediately after the
unit starts running. This is the sound of the
refrigerant fl owing or the dehumidifi er draining.
• A clacking sound is heard. • This is a sound generated when the heat
exchanger or other part expands and contracts
slightly due to temperature change.
• Discharged air smells unusual. • Various smells from the walls, carpet, clothes,
cigarette, cosmetics or other things adhere to
the air conditioner.
• The unit does not run. • Has a blackout occurred?
• Has the circuit breaker blown?
• Has the protective device been activated?
(The operation indicator and
on the remote
controller are blinking.)
Check again.
The room does not cool down.
• Is the air intake or discharge of the outdoor unit
clogged?
• Is a door or window open?
• Is the air fi lter clogged with dust?
• Is the air volume set to “LOW”? Or is the
operation mode set to “FAN”?
• Is the setup temperature appropriate?
If there is something unusual even after checking the above, stop running the unit, turn off the circuit breaker, and
inform the dealer where you purchased the product of the product number and symptom. Do not attempt to repair
the unit by yourself as doing so is dangerous. If the check indicator (e.g.
, , ) is displayed on the remote
controller LCD, inform the dealer of its content as well.
If any of the following occur, stop running the unit immediately, turn off the circuit breaker, and contact the dealer
where you purchased the product.
• The switch does not work properly.
• The circuit breaker often blows out.
• You unintentionally put a foreign object or water inside.
• The unit cannot be run even after the cause of the protective device activation is removed.
• Other unusual conditions are found.
NOTE
For environmental conservation, it is strongly recommended that the indoor and outdoor units of the air conditioner
in use be cleaned and maintained regularly to ensure effi cient operation of the air conditioner.
When the air conditioner is operated for a long time, periodic maintenance (once a year) is recommended.
Furthermore, regularly check the outdoor unit for rust and scratches, and remove them or apply rustproof
treatment, if necessary.
As a general rule, when an indoor unit is operated for 8 hours or more daily, clean the indoor unit and outdoor unit
at least once every 3 months. Ask a professional for this cleaning / maintenance work.
Such maintenance can extend the life of the product though it involves the owner’s expense.
Failure to clean the indoor and outdoor units regularly will result in poor performance, freezing, water leakage, and
even compressor failure.
▼ Maintenance List
Part Unit Check (visual / auditory) Maintenance
Heat exchanger Indoor / outdoor Dust / dirt clogging, scratches
Wash the heat exchanger when it is
clogged.
Fan motor Indoor / outdoor Sound
Take appropriate measures when abnormal
sound is generated.
Filter Indoor Dust / dirt, breakage
• Wash the fi lter with water when it is
contaminated.
• Replace it when it is damaged.
Fan Indoor
• Vibration, balance
• Dust / dirt, appearance
• Replace the fan when vibration or
balance is terrible.
• Brush or wash the fan when it is
contaminated.
Air intake /
discharge grilles
Indoor / outdoor Dust / dirt, scratches
Fix or replace them when they are
deformed or damaged.
Drain pan Indoor
Dust / dirt clogging, drain
contamination
Clean the drain pan and check the
downward slope for smooth drainage.
Ornamental
panel, louvers
Indoor Dust / dirt, scratches
Wash them when they are contaminated or
apply repair coating.
Exterior outdoor
• Rust, peeling of insulator
• Peeling / lift of coat
Apply repair coating.
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