GD Midea Refrigerant Equipment Co. Ltd Service manual for F Dehumidifier
7
Worn bearings Replace the motor if knocking sounds continue w hen
running or loose, or the motor hums or noise appears to be
internal while running.
Excessive
noise
Copper tubing Remove the cabinet and carefully rearrange tubing not to
contact cabinet, compress or, shroud and barrier.
Voltage Check voltage. Call an electrician if not within limits.
Wiring Check the w ire connections, if loose, repair or replace the
terminal. If wires are of f, refer to wiring diagram for identification,
and replace. Check w ire locations. If not per wiring diagram,
correct.
Main PCB failure Replace the main PCB if open.
Capacitor (Discharge
capacitor before testing)
Check the capacitor. Replace if not within 10% of
manufacturers rating. Replace if shorted, open, or damaged.
Humidity sensor Replace if shorted, open, or damaged.
Compress or
will not run while
fan motor runs
Compressor Check the compressor f or open circuit or ground. If open or
grounded, replace the compressor.
Air filter Clean or replace if restricted.
Condenser and
Evaporator
Clean or replace if restricted.
Fan motor Check the fan capacitor and replace if not within 10% of
manufactures rating.
Room structure Take proper measures to make the door and window s
sealed w ell if gap is found.
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.
Insufficient
capacity
Compress 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 pres sure and low
pressure. Replace the compressor after checking f or the reason.
Refrigerant The amount of the refrigerant is too much, making the
compressor load too big. Recycle and recharge the refrigerant
after checking for the reason.
Stop instantly
after
startup.
Compressor The compressor is heat stuck. Replace after checking for the
reason.
Humidity sensor Check and replace if the Humidity sensor is open or
damaged.
The
compressor not to
stop even the room
humidity has got to
the setting value.
Main PCB Check and replace the main PCB
The unit starts
and s tops
Power supply The input power supply voltage is too low . Call an electrician
if not within limits.
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