Midea MPK-09CEN2 Service Manual page 8

GD Midea Refrigeration Equipment Co. Ltd
Air filter
Air discharge pipe
Unit undersized
Condenser and Evaporator
Water shower failure
Fan motor
Cooling or heating
Air flow
feels not good
Less refrigerant
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
Main PCB
stops frequently.
Room temperature
Clean or replace if restricted.
Realign and assemble if the installation of the air discharging
pipe failure. Replace if damaged.
Determine if the unit is properly sized for the area to be cooled or
heated.
Clean or replace if restricted.
Check the structure of water showering system and clean if
blocked.
Check the fan capacitor and replace if not within +/-10% of
manufactures rating.
Clean or remove if any barrier is found to block the inlet/outlet
wind flow of the unit.
Check the tubes for reasons of leakage. Recycle the refrigerant,
correct the leakage points and recharge.
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.
7
Service manual for K portable Series