Midea Ultimate Comfort Series User Manual page 9

Troubleshooting
When troubles occur, please check the following points before contacting a repair company.
Problem Possible Causes
Temperature setting may
be higher than ambient
room temperature
The heat exchanger on the
indoor or outdoor unit is
dirty
The air lter is dirty
The air inlet or outlet of
either unit is blocked
Doors and windows are
open
Poor Cooling
Performance
Excessive heat is generated
by sunlight
Too many sources of heat
in the room (people,
computers, electronics,
etc.)
Low refrigerant due to leak
or long-term use
SILENCE function is
activated(optional function)
Solution
Lower the temperature setting
Clean the a ected heat exchanger
Remove the filter and clean it
according to instructions
Turn the unit o , remove the
obstruction and turn it back on
Make sure that all doors and
windows are closed while
operating the unit
Close windows and curtains
during periods of high heat or
bright sunshine
Reduce amount of heat sources
Check for leaks, re-seal if
necessary and top o refrigerant
SILENCE function can lower
product performance by reducing
operating frequency. Turn o
SILENCE function.
 Page 16 
Problem Possible Causes
Power failure
The power is turned o
The fuse is burned out
The unit is not
working
Remote control batteries are
dead
The Unit' s 3-minute protection
has been activated
Timer is activated
There' s too much or too little
refrigerant in the system
Incompressible gas or
The unit starts and moisture has entered the
stops frequently
system.
The compressor is broken
The voltage is too high or
too low
The outdoor temperature is
exetremtly low
Cold air is entering through
Poor heating
doors and windows
performance
Low refrigerant due to leak or
long-term use
Indicator lamps
continue flashing
The unit may stop operation or continue to run safely. If
the indicator lamps continue to flash or error codes appear,
Error code appears in
wait for about 10 minutes. The problem may resolve itself.
the window display
If not, disconnect the power, then connect it again. Turn
of indoor unit:
the unit on.
E0, E1, E2...
•
If the problem persists, disconnect the power and contact
P1, P2, P3...
•
your nearest customer service center.
F1, F2, F3...
•
NOTE: If your problem persists after performing the checks and diagnostics above, turn o your
unit immediately and contact an authorized service center.
 Page 17 
Solution
Wait for the power to be
restored
Turn on the power
Replace the fuse
Replace batteries
Wait three minutes after
restarting the unit
Turn timer o
Check for leaks and
recharge the system with
refrigerant.
Evacuate and recharge the
system with refrigerant
Replace the compressor
Install a manostat to
regulate the voltage
Use auxiliary heating
device
Make sure that all doors
and windows are closed
during use
Check for leaks, re-seal
if necessary and top o
refrigerant