Midea MTA-76C(H)RN1 Technical Manual page 104

Midea R410A T3 Top-discharge Split Type Series 50Hz
Symptom
The system does
not run.
Symptom
The heating effect is
poor.
Symptom
The air conditioner
sends air out but
cannot provide cool
air at all.
Symptom
The cooling effect is
poor.
103
Possible causes
Power supply fails.
The power switch is not
connected.
The fuse blows out or the circuit
breaker acts.
The remote controller or wired
controller fails.
Possible causes
The outdoor environment
temperature is lower than -7° C.
The door or window is not closed
tightly.
The refrigerant is leaked or
replenishment is deficient.
Possible causes
The setting temperature is
improper.
3-minutes protection of the
compressor.
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.
MCAC-UTSM-201501
Way of handing
Operate it after power supply resumes
and connect the power supply properly.
Replace the fuse or check whether
electric leakage occurs.
Check the remote controller or wired
controller.
Way of handing
Use a heating device. The unit cannot
operate normally.
Close door and window tightly.
Detect leak, and fill the refrigerant of a
correct quantity.
Way of handing
The setting temperature is lower than
the room's during the cooling status or
higher during the heating status.
Waiting for 3 minutes.
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.