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18
Troubleshooting
Follow the troubleshooting guide below to resolve common issues.
Problem
Possible Cause
Solution
Air conditioner
does not function
at all.
Wall plug is disconnected.
Insert plug firmly into proper wall
outlet.
House fuse blown or
circuit breaker tripped.
Replace fuse with time delay type or
reset circuit breaker.
Power cord is tripped.
Press the RESET button on the power
cord.
Unit is turned OFF.
Turn unit ON and set to desired
setting.
Ribbon cable to control
panel is disconnected.
Remove front grill and reconnect
cable.
Loose or disconnected
wiring on main PCB.
Remove front grill and outer shell.
Check all connections to the PCB and
reconnect any loose or disconnected
leads.
Air from unit
does not feel
cold enough.
Room temperature is
below 62℉ (17℃).
Cooling will not occur until room
temperature rises above 62℉ (17℃).
Temperature sensor
behind the front grill and
air filter is touching the
cold evaporator.
Realign sensor so it does not touch
the evaporator coil. It should only be
sensing the air temperature leaving
the evaporator.
Set temperature is too
high.
Set to a Lower temperature.
Compressor is shut-off by
changing modes.
Wait approximately 3 minutes and
listen for compressor to restart when
set in COOL mode.
Air conditioner
cooling, but room
is too warm - ice
forming on
cooling coil
behind front grill.
Outdoor temperature
below 62℉ (17℃).
To defrost the coil, set to FAN ONLY
mode.
Air filter may be dirty.
Clean filter. Refer to Installation 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.
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