23
9 Troubleshooting
In general, possible trouble is classified in three kinds. One is called Starting Failure which is
caused from an electrical defect, another is ineffective Air Conditioning caused by a defect in the
refrigeration circuit and improper application, and the other is called the Structure Damage.
Problem
Solution
Air conditioner
does not start
Wall plug disconnected. Push plug firmly into wall outlet.
House fuse blown or circuit breaker tripped. Replace fuse with time delay type or
reset circuit breaker.
Plug Current Device Tripped. Press the RESET button.
Control is OFF. Turn Control ON and set to desired setting.
Air from unit does
not feel cold
enough
Room temperature below 17
℃
(62
℉
). Cooling may not occur until room temperature
rises above 17
℃
(62
℉
).
Temperature sensing element touching cold coil, located behind air filter. Straighten
tube away from coil.
Reset to a Lower temperature.
Compressor shut-off by changing modes. Wait approximately 3 minutes and listen for
compressor to restart when set in the COOL mode.
Air conditioner
cooling, but room
is too warm- ice
forming on cooling
coil behind
decorative front.
Outdoor temperature below 17
℃
(62
℉
). To defrost the coil, set FAN ONLY mode.
Air filter may be dirty. Clean filter. Refer to Care and Cleaning section. To defrost,
set to FAN ONLY mode.
Thermostat set too cold for night-time cooling. To defrost the coil, set to FAN ONLY
mode. Then, set temperature to a Higher setting.
Air conditioner
cooling, but room
is too warm- NO
ice forming on
cooling coil behind
decorative front.
Dirty air filter- air restricted. Clean air filter. Refer to Care and Cleaning section.
Temperature is set too High, set temperature to a Lower setting.
Air directional louvers positioned improperly. Position louvers for better air distribution.
Front of units is blocked by drapes, blinds, furniture, etc. - restricts air distribution.
Clear blockage in front of unit.
Doors/ windows/registers, etc. Open- cold air escapes. Close doors, windows, registers.
Unit recently turned on in hot room. Allow additional time to remove. Stored heat from
walls, ceiling, floor and furniture.
Air conditioner
turns on
and off rapidly
Dirty air filter- air restricted. Clean air filter
Outside temperature extremely hot. Set FAN speed to a Higher setting to bring air past
cooling coils more frequently.
Noise when unit is
cooling
Air movement sound. This is normal. If too loud, set to a slower FAN setting.
Window vibration - poor installation. Refer to installation instructions or check with
installer.
