Page 41
mrcool.com
Symptom
Possible Causes
Poor Cooling
Performance
Temperature setting may be higher than
ambient room temperature
Solution
Lower temperature setting
The heat exchanger on the indoor unit is dirty
Clean the affected heat exchanger
The air filter is dirty
Remove the filter and clean it
according to the instructions
The air inlet or outlet of either unit is blocked
Turn the unit off , remove the
obstruction and turn it back on
Door and windows are open
Make sure that all doors and
windows are closed while
operating the unit
Excessive heat is generated by sunlight
Close windows and curtains
during periods of high heat or
bright sunshine
Too many sources of heat in the room ( people,
computers, electronics, etc.)
Reduce the amount of heat
sources
Low refrigerant due to leak or long-term use
Check for leaks, re-seal if necessary
and top off the refrigerant
SILENCE function is activated
(optional function)
SILENCE function can lower
product performance by reducing
operating frequency. Turn off
SILENCE function.
The unit is not
working
The fuse burned out
The unit starts
and stops
frequently
Poor heating
performance
Power failure
Wait for the power to be restored
The power is turned off
Turn on the power
Replace the fuse
Remote control batteries are dead
Replace the batteries
The unit’s 3 minute overload
protection function has been activated
Wait three minutes after restarting
the unit
Timer is activated
Turn timer off
There is excessive or not enough refrigerant in
the system
Check for leaks and recharge the
system with refrigerant
Incompressible gas or moisture has entered
the system
Evacuate and recharge the system
with refrigerant
The compressor is broken
Replace the compressor
The voltage is too high or too low
Install a manostat to regulate the
voltage
The outdoor temperature is extremely low
Use an auxiliary heating device
Cold air is entering through the doors and
windows
Make sure that all of the doors
and windows are closed
Low refrigerant due to a leak, or long-term use
Check for leaks, re-seal if
necessary, and top off the
refrigerant
Indicator lamps continue flashing
Error code appears and begins with
these letters on the indoor unit
display window:
E(x), P(x), F(x), EH(xx), EL(xx), EC(xx),
PH(xx), PL(xx),PC(xx)
The unit may stop operation or continue to run safely. If the indicator
lamps continue to flash or error codes appear, wait for about 10
minutes. The problem may resolve itself. If not, disconnect the power,
then connect it again. Turn the unit on. If the problem persists,
disconnect the power and contact your nearest customer service
center. For more information on the error codes please refer to
following pages.
