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EN
11
Maintenance
<Daily maintenance>
Cleaning of air filter
• Be sure to stop the air conditioner before cleaning of
air filter, then turn off the circuit breaker.
1
Take off the air filter.
When connecting a return air duct to the unit,
cleaning method of the air filter differs according to
the construction of duct end. Please ask the
constructor for construction of air duct.
• Slide and remove the filter as shown in the
following figure.
WARNING
When the first filter comes out without connected to the
other one, insert it once more to connect the two filters
together and pull out them as connected. Do not insert
hands to take out the second filter. You may injure
yourself.
2
Cleaning with water or vacuum cleaner
• If dirt is heavy, clean the air filter by tepid water
with neutral detergent or water.
• After cleaning with water, dry the air filter
sufficiently in a shade place.
3
Mount the air filter.
Insert the filter into the rail in the direction of the
arrow as shown in the figure below until it reaches
the filter stopper.
CAUTION
CAUTION
• Do not start the air conditioner while leaving air filter
removed.
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 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.
Inspection before maintenance
Following inspection must be carried out by a qualified installer or qualified service person.
Maintenance List
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
Access from check port and check if there are any stains or breaks on the filter.
Drain pan
Access from inspection opening and remove the access panel. Check if there is
any clogging or drain water is polluted.
Parts
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.
Ceiling panel, louvres
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.
51-EN
52-EN
