Heat Controller PE-91A PE-121A - Manual (Page 21)

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