Troubleshooting Guide - COMFORT-AIRE PE-91A PE-121A Owner's Manual

12.
Problem
The unit doesn't run
The unit has only fan,
no cooling even
though it is in the
cooling mode
The unit seems to do
little cooling or does
not cool quickly
The unit has worked
for a long time, but the
room is not cold
enough
Too noisy
The unit stops cooling
suddenly, only the fan
works and the
Water-Full indicator
display on the
control pane is on
Heat Controller, Inc.
TROUBLE SHOOTING
Cause
Power failure or plug is not
correctly inserted in the socket
Circuit breaker or line fuse has
been tripped
Power supply voltage is too low
The room temperature is not at
working range
The set temperature is too high
The filter is dirty and obstructed
Evaporator air is blocked
The air intake and outlet ducts of
the condenser side are obstructed
There is direct sunshine into room
The unit is set on dehumidifying
mode
Set at low fan speed
Windows or doors are open.
Too many people in the room
Something else in the room
produces heat
The room is not well insulated,
such as sunrooms, garages,
attics, etc.
The unit is not sitting evenly
The floor underneath the unit is
uneven
The environment is too wet and
the condensate water in the unit is
full
21
1900 Wellworth Avenue
Solution
Restore the power supply or
reset LCDI
Call your Electrician
Call your Electrician
Check your room temperature
Re-set the temperature to a lower
temperature
Clean the filer
Remove the blockage
Check both of the ducts
Close the curtains or blinds
Set at cooling mode
Re-set the fan speed at high
speed
Close all of the windows and
doors when the unit is working
Turn on other cooling unit
Turn off these products
Place the unit on an even surface
Change the position
Empty the water inside the unit.
Connect a pipe to the upper drain
port (refer to drawing in PARTS
Of Unit) at the back of the unit
then restart the unit. Wait for
approximately 1 hour to let
condensor side fan blow out the
water
Jackson, MI 49203