Midea EL-KF20GW/N2Y-A(B) Service Manual page 26

GD Midea Refrigerant Equipment Co. Ltd
PROBLEM
Air filter
Unit undersized
Condenser and
Evaporator
Room structure
Air flow
Sunlight
Outdoor fan motor
Insufficient
cooling or
heating.
indoor fan motor
Less refrigerant
Capillary tube
Compressor
Heat sources
Water drainage failure
The indoor unit is
incorrect installed
Water drops from
Drainage pipe
indoor unit
blocked
The humidity in room
is too high
Wiring failure
Zero-crossing
Wire EMC
error
Outdoor PCB failure
CAUSE
Clean or replace if restricted.
Determine if the unit is properly sized for the area to be cooled or
heated.
Clean or replace if restricted.
Take proper measures to make the door and windows sealed well if gap
is found.
Clean or remove if any barrier is found to block the inlet/outlet wind flow
of the unit.
Add a awning if the outdoor unit is exposed to the sunlight.
Check the fan capacitor on outdoor power control board and replace the
board if not within +/-10% of manufacturer's rating. Replace the motor if
the speed is not within +/-10% of manufacturer's rating but not because
of the capacitor.
For electrical function 2.3 models. Check the fan capacitor in indoor
electric box (for some models, the capacitor is on main PCB.) and
replace the capacitor (or main PCB) if not within +/-10% of
manufacturer's rating.
Replace the motor if the speed is not within +/-10% of manufacturer's
rating but not because of the capacitor.
Check the tubes for reasons of leakage. Recycle the refrigerant, correct
the leakage points and recharge.
Regulate the flow if capillary tube is blocked. Make the evaporating
temperature appropriate if the evaporator is frosted.
The inlet and outlet valve of the compressor is damaged, making the low
pressure connected with the high pressure. The refrigerating system is
difficult to produce high pressure and low pressure. Replace the
compressor after checking for the reason.
Reduce if over loaded.
Check the drainage pipe and repair if failure.
Correct the installation if not correct.
Correct it.
It's normal if the humidity in the room is over 85%.
Check wiring. Correct if wrong wiring or loosen.
Check wiring. Correct if the commucication wire is not shielded wire or
twisted with other wires.
Replace if the LED is not on.
Service manual for Electrolux split Series
REMEDY
25