Service and Maintenance
Maintenance Schedule
Item Maintenance Procedures Frequency
Indoor Air
Filters
Lift the return air grille and
remove the filters (See
Figure 23). Clean the filters
by using a vacuum cleaner
or wash in lukewarm water
and soap. Rinse and dry
before reinstalling.
As required to
prevent restriction
of air flow.
Indoor
Cabinet
Remove any dust on the
grille or panel by wiping it
with a soft cloth soaked in
lukewarm water (below
40ºC / 104ºF) and a mild
detergent.
As required to
maintain
appearance.
Outdoor
Unit
Clean the louvers and coil.
Be careful not to bend or
flatten the aluminium fins.
DO NOT use cleaning
fluids that might corrode
the coil.
As required to
prevent restriction
of air flow.
Troubleshooting
If any malfunction of the unit is noted, immediately switch
off the power supply.
Check the following chart for possible causes/treatments.
If the trouble persists, please call your local
dealer/serviceman.
Trouble Possible Cause/Treatment
The compressor
does not operate.
Protection against frequent
starting. Wait for 3 to 4 minutes
for the compressor to start
operating.
Fans and
compressor do not
operate.
Power failure.
Check fuse or circuit breaker.
Power supply disconnect off.
Delay timer may be set
incorrectly. Adjust timer setting
by using remote controller.
Air flow too low or
insufficient
cooling/heating
capacity.
Dirty air filters.
Open doors or window.
Adjust thermostat setting.
Discharge air flow
has bad odor.
Smoke, perfume, etc. may
have collected on the indoor
coil.
Clean coil.
Condensation on the
return air grille of the
indoor unit.
Use dry mode. High humidity in
conditioned space.
Set temperature too low.
Increase temperature setting
and operate unit at high fan
speed.
Condensate leaking
into room.
Condensate drain plugged.
Hissing sound from
the unit during
operation.
Refrigerant fluid flowing into the
evaporator coil. Operate for a
while to see if sound goes
away.
CAUTION
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