Maintenance and Service
Troubleshooting
The air conditioner may be operating abnormally when:
Problem
I The air conditioner is
unplugged or not plugged in
completely.
I The fuse is blown/circuit
breaker is triggered.
I Power failure.
The air
conditioner
does not
operate at all
I The current interrupter
device is tripped.
I Air flow is restricted.
I The TEMP Control may not
be set high enough
I The air filter is dirty.
Air
conditioner
does not
cool
I The air conditioner was just
turned on.
I Cold air is escaping.
I The cooling coils are iced
Ice appears
over.
on the air
conditioner.
20 Room Air Conditioner
All manuals and user guides at all-guides.com
Possible Causes
What To Do
• Make sure the plug is completely
plugged into the outlet.
• Check the fuse/circuit breaker box and
replace the fuse or reset the breaker.
• In the event of a power failure, set the
power control to OFF. When the power
is restored, wait 3 minutes to restart
the air conditioner to prevent the
compressor from overloading.
• Press the RESET button located on
the power cord plug. If the RESET
button will not stay engaged,
discontinue use of the air conditioner
and contact a qualified service
technician.
• Make sure there are no curtains,
blinds, furniture or other obstacles in
front of the air conditioner.
• Turn the knob to a higher setting.
The highest setting provides maximum
cooling.
• Clean the filter at least every 2 weeks.
Refer to the "Maintenance and
Service" section of the manual.
• After the air conditioner is turned on,
you need to give the air conditioner
some time to cool the room.
• Check for open furnace floor resisters
and cold air returns.
• CLOSE the air conditioner vent.
• Ice may block the air flow and obstruct
the air conditioner from properly
cooling the room.
Set the mode control at High cool with
the temperature setting 1 or 2.
(warmer setting)