Midea MWF-07CM User Manual

GD Midea Refrigerant Equipment Co. Ltd Service manual for E1 Window
9
3.2 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in three kinds. One is called Starting Failure which is caused from
an electrical defect, another is ineffective Air Conditioning caused b a defect in the refrigeration circuit and
improper application, and the other is called the Structure Damage.
ROOM AIRCONDITIONER VOLTAGE LIMITS:
NAMEPLATE RATING MINIMUM MAXIMUM
220~240V 196V 253V
PROBLEM POSSIBLE CAUSE REMED
No power Check voltage at electrical outlet. Correct if none.
Power supply cord
Check voltage at the power cord terminal. Replace the
power cord if none.
Wire disconnected or
connection loose
Connect wire. Refer to wiring diagram for terminal
identification. Repair or replace loose terminal.
Main switch failure Check and replace the main switch if failure.
Capacitor (Discharge
capacitor before
testing)
Test capacitor.
Replace if not within +/-10% of manufacture's rating.
Replace if shorted, open or damaged.
Fan motor will not
run.
Will not rotate
Fan blade hitting shroud or blower hitting scroll. Realign
assembly.
Check fan motor bearings. Replace the motor if motor shaft
do not rotate.
Check voltage. Call an electrician if not within limits.
Test capa
citor.
Replace if not within +/-10% of manufacture's rating.
Check bearings. Replace the motor if the fan blade cannot
rotate freely.
Fan motor runs
intermittently
Cycles on overload.
Pay attention to any change from high speed to low speed.
Replace the motor if the speed does not change.
Fan
Replace the fan if cracked, out of balance, or partially
missing.
Blower
Replace the blower if cracked, out of balance, or partially
missing.
Loose screws Tighten them.
Fan motor noise.
Worn bearings
Replace the motor if knocking sounds continue when running
or loose, or the motor hums or noise appears to be internal
while running.
The compressor
not to stop even
the room
temperature has
got to the setting
temperature.
Thermostat Check and replace if the thermostat is damaged.

Midea MWF-07CM Specifications

General

Brand	Midea
Model	MWF-07CM
Category	Air Conditioner
Language	English