Midea MFA3T-96CRN1, Technical & Service Manual

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Midea R410A T3 50Hz Top-discharge Series MCAC-UTSM-201707
85
Symptom Possible causes Way of handing
The cooling effect is
poor.
The condenser or evaporator is
too dirty.
Clean the heat-exchanger.
The filter is blocked. Clean the filter.
The intake orifice or exhaust
orifice of the indoor and outdoor
unit is blocked.
Remove foreign matters to keep well
ventilated.
The door or window is opened. Close all the windows and doors.
Directly exposed to sunlight.
Obstruct sunlight by curtains or
jalousie.
Too many heat sources. Reduce heat sources.
Too high outdoor environment
temperature.
It is normal, and the cooling effect of the
air conditioner is deteriorated.
The refrigerant is leaked or the
replenishment is deficient.
Detect leak, and fill the refrigerant of a
correct quantity.
Symptom Possible causes Way of handing
The unit keep
starting up and
shutting down
frequently
The refrigerant is excessive or
deficient.
Detect leak, and fill the refrigerant of a
correct quantity.
Air or non-condensable gas
exists in the refrigerant loop.
Make a vacuum again and fill the
refrigerant.
The compressor fails. Repair or replace the compressor.
The voltage is too high or too
low.
Install a voltage regulator.
The refrigerant loop is
obstructed.
Locate the causes and replace the part.
11.3 Faults of remote controller and cause
Before requesting for maintenance or repair, inspect the following:

The shift function cannot be set.
Symptom Check item Cause
The wind speed
cannot be shifted.
Check whether the mode
marked the screen of controller
is AUTO .
When you select the AUTO mode, the
indoor unit will select “
AUTO
” for the air
speed automatically
Check whether the mode
marked on the controller screen
is DEWET .
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.