Loading ...
Loading ...
Loading ...
Page 25 mrcool.com
Troubleshooting
Problem Time of Occurrence Cause
Mist comes from the
unit.
Unit doesn’t run.
The unit
generates noise.
The unit
emits odor.
Indoor unit still
runs after
switched o.
Dust comes from
the unit.
During operation.
When power is turned on.
When unit is started immediately after it
is just turned o.
There is a continuous sound when cooling.
The unit makes a sound when unit
starts or stops.
Slight cracking sound is heard when unit
is turned on.
Electronic expansion valve initialization
can cause this noise temporarily.
There is slight and continuous sound
when unit is running or after running.
When unit runs after no operation for
a long period of time.
After every indoor unit receives "stop"
signal, fan will keep running.
If the unit is running under high
humidity, the wet air in the room will be
quickly cooled down.
Overload protection switch causes a 3
minute delay.
Start up could be delayed up to
1 minute.
Gas refrigerant ow can cause a slight noise.
Gas refrigerant ow can cause a slight noise.
The drainage system can cause this
noise during operation.
Dust has settled inside the indoor unit.
During operation.
Smells from the operating environment
may be pulled through the air handler.
Indoor fan can be set as “ON” or “AUTO”
mode. Under “ON” mode, indoor fan
will keep running after switching o the
unit.
(2) The following situations are not operation failures.
Loading ...
Loading ...
Loading ...