Midea MTB1T-96CWN1 Technical & Service Manual page 86

Midea R410A T3 50Hz Top-discharge Series
Symptom
The cooling effect is
poor.
Symptom
The unit keep
starting up and
shutting down
frequently
11.3 Faults of remote controller and cause
Before requesting for maintenance or repair, inspect the following:

The shift function cannot be set.
Symptom
The wind speed
cannot be shifted.
85
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 DEWET.
MCAC-UTSM-201707
Way of handing
Clean the heat-exchanger.
Clean the filter.
Remove foreign matters 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 you select the AUTO mode, the
indoor unit will select "AUTO" for the air
speed automatically
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.