Midea MPM1-10CEN1-BB6 Technical & Service Manual page 31

Capillary tube
Compressor
Heat sources
No power
Wiring
Temperature setting
Mode setting
No cooling or
Compressor
heating.
Electric heater failure
Over heat fuse failure
Main PCB
Power supply
The unit starts
and stops Main PCB
frequently.
Room temperature
29
Regulate the flow if capillary tube and make the
evaporating temperature appropriate if the evaporator is
frosted. Replace if blocked. Repair joint if leaking.
The inlet and outlet valve of the compressor is damaged,
making the low pressure connected with the high pressure.
The refrigerating system can not produce high pressure
and low pressure. Replace the compressor after checking
for the reason.
Reduce if too many.
Check the voltage. Call an electrician if no within the limit.
Check the terminals. Repair and correct if loose.
Check and adjust the temperature setting.
Check and adjust the mode setting.
Check and replace if the compressor, the over-load
protector or wiring is broken.
Check and replace if the heater is damaged.
Check and replace if the fuse is damaged.
Check the voltage of main PCB. Replace the main PCB
when the unit failure in heating mode.
The input power supply voltage is too low. Call an
electrician if not within limits.
Check and replace the main PCB if the compressor relay
on PCB is shorted or damaged.
When the room temperature is too high, the compressor
will protect.
Trouble shooting