Owners Manual

Page 34
mrcool.com
Outdoor Unit Installation
Maintenance
4
4
Maintenance
Troubleshooting
(1) If your air conditioner fails to function normally, check the following items before conducting maintenance:
Problem Cause Corrective Measure
The air conditioner
will not activate.
Inadequate cooling
If you turn off the unit and then
immediately turn it on, in order to
protect the compressor and avoid
system overload, compressor will
delay running for 3 minutes.
Wire connections are incorrect.
Fuse or circuit breaker is broken.
Power failure.
Please wait for approx. 3 minutes.
Connect wires according to the
wiring diagram.
Replace the fuse or switch on the
circuit breaker.
Restart once power is restored.
Wired connection or power plug is
loose.
Re-insert or adjust wires for proper
connections to designated terminals.
Air inlet and outlet of the units are
blocked.
Clear the obstacles and keep the
area well ventilated.
Improper temperature setting. Reset to a proper temperature.
Fan speed is too low. Reset to a proper fan speed.
Airflow direction is incorrect. Change the direction of air louvers.
Doors and/or windows are open. Close them.
Air inlet and outlet of the units are
blocked.
Clear the obstacles and keep the
area well ventilated.
Exposed to direct sunlight.
Close curtains or louvers in front of
the windows.
Too many heat sources in the room. Remove unnecessary heat sources.
Filter is blocked or dirty. Replace with a new return filter.