GD Midea Refrigeration Equipment Co. Ltd Service manual for K portable Series
7
Air filter Clean or replace if restricted.
Air discharge pipe
Realign and assemble if the installation of the air discharging
pipe failure. Replace if damaged.
Unit undersized
Determine if the unit is properly sized for the area to be cooled or
heated.
Condenser and Evaporator Clean or replace if restricted.
Water shower failure
Check the structure of water showering system and clean if
blocked.
Fan motor
Check the fan capacitor and replace if not within +/-10% of
manufactures rating.
Air flow
Clean or remove if any barrier is found to block the inlet/outlet
wind flow of the unit.
Less refrigerant
Check the tubes for reasons of leakage. Recycle the refrigerant,
correct the leakage points and recharge.
Capillary tube
Regulate the flow if capillary tube and make the evaporating
temperature appropriate if the evaporator is frosted. Replace if
blocked. Repair joint if leaking.
Compressor
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.
Cooling or heating
feels not good
Heat sources
Reduce if too many.
No power Check the voltage. Call an electrician if no within the limit.
Wiring Check the terminals. Repair and correct if loose.
Temperature setting Check and adjust the temperature setting.
Mode setting Check and adjust the mode setting.
Compressor
Check and replace if the compressor, the over-load protector or
wiring is broken.
Electric heater failure Check and replace if the heater is damaged.
Over heat fuse failure Check and replace if the fuse is damaged.
No cooling or
heating.
Main PCB
Check the voltage of main PCB. Replace the main PCB when the
unit failure in heating mode.
Power supply
The input power supply voltage is too low. Call an electrician if
not within limits.
Main PCB
Check and replace the main PCB if the compressor relay on PCB
is shorted or damaged.
The unit starts and
stops frequently.
Room temperature
When the room temperature is too high, the compressor will
protect.
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