54-EN
53-EN
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Maintenance
Periodic Maintenance
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 ef
fi
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.
Inspection before maintenance
Following inspection must be carried out by a quali
fi
ed installer or quali
fi
ed service person.
Parts
Inspection method
Heat exchanger
Access from inspection opening and remove the access panel. Examine the heat exchanger if
there is any clogging or damages.
Fan motor
Access from inspection opening and check if any abnormal noise can be heard.
Fan
Access from inspection opening and remove the access panel. Examine the fan if there are any
waggles, damages or adhesive dust.
Filter
Go to installed location and check if there are any stains or breaks on the
fi
lter.
Drain pan
Access from inspection opening and remove the access panel. Check if there is any clogging or
drain water is polluted.
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
y
Wash the
fi
lter with water when it is
contaminated.
y
Replace it when it is damaged.
Fan
Indoor
y
Vibration, balance
y
Dust / dirt, appearance
y
Replace the fan when vibration or
balance is terrible.
y
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.
Ceiling panel, louvres
Indoor
Dust / dirt, scratches
Wash them when they are contaminated
or apply repair coating.
Exterior
Outdoor
y
Rust, peeling of insulator
y
Peeling / lift of coat
Apply repair coating.
Wired remote controller
Be sure to stop the air conditioner before making
settings.
(Change the setup while the air conditioner is not
working.)
1
Push and hold OFF timer button and
[
] setting button simultaneously for
10 seconds or more. [TEST] is displayed
on the display part and the test run is
permitted.
2
Push ON/OFF button.
3
Push menu button to select the operation
mode. Select [ Cool] or [ Heat] with
[
] [
] setting button, and then push
menu button (three times) again to
determine the operation mode.
y
Do not run the air conditioner in a mode other
than [Cool] or [Heat].
y
The temperature setting function does notwork
during test run.
y
The check code is displayed as usual.
4
After the test run, push OFF timer button to
stop a test run.
([TEST] disappears on the display and the air
conditioner enters the normal stop mode.)
