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10
Maintenance
WARNING
Cleaning the air filter and other parts of the air filter involves dangerous work in high places, so be sure
to have a qualified installer or qualified service person to do it.
Do not attempt it by yourself.
After the cooling or dry auto (cooling) operation has finished, the dry operation is performed and the fan
starts running. When cleaning the unit, stop the drying operation forcibly and turn off the circuit breaker
to avoid electric shock.
Cleaning air filters
Clogged air filters will reduce the cooling and heating performance.
(1) If “
” is displayed on the remote controller, clean the air filters.
(2) When the cleaning of air filters has been completed, push
button.
“
” disappears.
When the unit will not be used for a long time
1. Perform the fan operation for a couple of hours to dry inside.
2. Press
on the remote controller to stop running, and turn off the circuit breaker.
3. Clean the air filters and reinstall them.
Before the cooling season
Clean the drain pan
• Contact the dealer where you purchased the product.
(Drain does not work if the drain pan or vent is clogged. In some cases the drain may overflow and wet the wall or floor. Be
sure to clean the drain pan before the cooling season.)
(1)
(2)
Check periodically
• If the unit is used for a long time, parts may deteriorate and cause malfunction or bad drainage of dehumidified water
depending on the heat, humidity, or dust.
• In addition to the usual maintenance, it is recommended that you have the unit checked and maintained by the dealer where
you purchased it.
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 efficient 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 filter 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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