Midea MWF1-07CMN1-NC0, Manual

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35
8 Troubleshooting
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 by a defect in the refrigeration
circuit and improper application, and the other is called the Structure Damage.
Problem Solution
Air conditioner
does not start
Wall plug disconnected. Push plug firmly into wall outlet.
House fuse blown or circuit breaker tripped. Replace fuse with time delay type or
reset circuit breaker.
Selector Control in OFF position. Turn selector to the desired FAN or COOL setting.
Unit turned off by moving thermostat to a higher number and then immediately
turning back to a colder number. Wait approximately 3 minutes. Listen for compressor to start.
Unit turned off and then on too quickly. Turn unit off and wait 3 minutes before restarting.
Thermostat set too low. Adjust thermostat to higher number for cooling.
Air from unit does
not feel cold
enough
Turn selector to a higher COOL position.
Thermostat set too warm. Set thermostat to colder temperature.
Room temperature below 18
℃
(64
℉
). Cooling may not occur until room temperature rises
above 18
℃
(64
℉
).
Temperature sensing tube touching cold coil, located behind air filter. Straighten tube away
from coil.
Air conditioner
cooling, but room
is too warm- ice
forming on cooling
coil behind
decorative front.
Outdoor temperature below 18
℃
(64
℉
). To defrost the coil, set selector to FAN
position. Then, set thermostat to warmer position.
Air filter may be dirty. Clean filter. Refer to Care and Cleaning section. To defrost, set selector
to FAN.
Thermostat set too cold for night-time cooling. To defrost the coil, set selector to a FAN
position. Then, set thermostat to a warmer position.
Air conditioner
cooling, but room
is too warm- NO
ice forming on
cooling coil behind
decorative front.
Dirty air filter- air restricted. Clean air filter. Refer to Care and Cleaning section.
Thermostat set too warm. Turn thermostat clockwise to a colder setting.
Air directional louvers positioned improperly. Position louvers for better air distribution.
Front of units is blocked by drapes, blinds, furniture, etc. - restricts air distribution.
Clear blockage in front of unit.
Doors/windows/registers, etc. Open- cold air escapes. Close doors, windows, registers.
Unit recently turned on in hot room. Allow additional time to remove. Stored heat from
walls, ceiling, floor and furniture.
Air conditioner
turns on and off
rapidly
Dirty air filter- air restricted. Clean air filter.
Outside temperature extremely hot. Set to high cool to bring air past cooling coils more
frequently.
Noise when unit is
cooling
Air movement sound. This is normal. If too loud, turn selector to lower FAN setting.
Sound of fan hitting water-moisture removal system. This is normal when humidity is high.
Close doors, windows and registers.
Window vibration - poor installation. Refer to installation instructions or check with installer.
Water dripping
INSIDE when
unit is cooling.
Improper installation. Tilt air conditioner slightly to the outside to allow water drainage. Refer to
installation instructions - check with installer.
Unit removing large quantity of moisture from humid room. This is normal during excessively
humid days.