Faults Of Remote Controller And Cause - Midea MTA1-76HR Technical Manual

Midea R22 T1 side-discharge duct manual
Symptom
The cooling effect is
poor.
Symptom
The cooling effect is
poor.

4.3 Faults of remote controller and cause


The shift function cannot be set.
Symptom
The wind speed
cannot be shifted.
32
Possible causes
The condenser or evaporator is
too dirty.
The filter is blocked.
The intake orifice or exhaust
orifice of the indoor and outdoor
unit is blocked.
The door or window is opened.
Directly exposed to sunlight.
Too many heat sources.
Too high outdoor environment
temperature.
The refrigerant is leaked or the
replenishment is deficient.
Possible causes
The refrigerant is excessive or
deficient.
Air or non-condensable gas
exists in the refrigerant loop.
The compressor fails.
The voltage is too high or too
low.
The refrigerant loop is
obstructed.
Check item
Check whether the mode
marked the screen of controller
is AUTO.
Check whether the mode
marked on the controller screen
is DRY.
MCAC-RTSM-201301-01
Way of handing
Clean the heat-exchanger.
Clean the filter.
Remove foreign mattes to keep well
ventilated.
Close all the windows and doors.
Obstruct sunlight by curtains or
jalousie.
Reduce heat sources.
It is normal, and the cooling effect of the
air conditioner is deteriorated.
Detect leak, and fill the refrigerant of a
correct quantity.
Way of handing
Detect leak, and fill the refrigerant of a
correct quantity.
Make a vacuum again and fill the
refrigerant.
Repair or replace the compressor.
Install a voltage regulator.
Locate the causes and replace the part.
Cause
When the auto mode is selected, the
indoor fan speed will be in automatically
running and cannot be adjusted.
When the dry mode is selected, the
indoor unit will set fan speed
automatically. The speed can
selectable only in cooling, heating and
fan mode.