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Concealed Duct High Static Pressure
Owner’s Manual
Concealed Duct High Static Pressure
Owner’s Manual
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9 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.
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.
CAUTION
Cleaning remote controller
• Use a dry cloth to wipe the remote controller.
• Never use a damp cloth on the remote controller.
• Do not use a chemically-treated duster for wiping or leave such materials on the unit for long.
It may damage or fade the surface of the unit.
• Do not use benzine, thinner, polishing powder, or similar solvents for cleaning.
These may cause the plastic surface to crack or deform.
Periodic check
Long-period use of the air conditioner may cause deterioration or failure of parts due to heat,
humidity, dust, and operating conditions, or may cause poor drainage of dehumidified water.
Preparing for long Shut Down Period
1) Clean the filters and reposition them in unit.
2) Operate the unit in fan mode for 3 or 4 hours to dry all internal parts.
3) Turn the unit off and disconnect the main power supply.
4) Before unit is turned on again, make sure the circuit breaker has been
turned on for at least 12 hours.
Check points before operation
1) Check that the air filters are installed.
2) Check that the air outlet or inlet is not blocked.
3) Turn on the main power switch or the circuit breaker for the main power supply to the air conditioner.
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
Heat exchanger
Fan motor
Filter
Fan
Air inlet/outlet grilles
Drain pan
Ornamental panel,
louvers
Exterior
Unit
Indoor/outdoor
Indoor/outdoor
Indoor
Indoor
Indoor/outdoor
Indoor
Indoor
Outdoor
Check (visual/auditory)
• Dust/dirt clogging, scratches
• Sound
• Dust/dirt, breakage
• Vibration, balance
• Dust/dirt, appearance
• Dust/dirt, scratches
• Dust/dirt clogging,
drain contamination
• Dust/dirt, scratches
• Rust, peeling of insulator
• Peeling/lift of coat
Maintenance
• Wash the heat exchanger when it is clogged.
• Take appropriate measures when abnormal sound is
generated.
• Wash the filter with water when it is contaminated.
• Replace it when it is damaged.
• Replace the fan when vibration or balance is terrible.
• Brush or wash the fan when it is contaminated.
• Fix or replace them when they are deformed or
damaged.
• Clean the drain pan and check the downward slope
for smooth drainage.
• Wash them when they are contaminated or apply
repair coating.
• Apply repair coating
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