UNIT MAINTENANCE &
SER
VICE GUIDE
P33 OF 46
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
Indoor unit doesn't blow air.
1) Is the unit in 3-minutes restarting protection period?
2) In heating mode, the indoor fan motor will not rotate before the
indoor coil is hot enough. This is a normal anti-cold air blowing
function.
3) Is the outdoor unit defrosting?
4) Is the unit in fan-pausing period of dehumidification mode?
5) Is the filter dirty?
6) Is the fan motor setting screw loose?
7) Is the fan capacitor bad?
8) Is the fan motor bad?
Condensate forms at air discharge louver.
This is normal when the conditioned cool air is mixed with the
warm/hot and humid indoor air. Condensate may go away
gradually once the indoor air is dehumidified and cooled down.
Water drips out of indoor unit.
1) Is indoor air too warm and humid?
2) Is condensate drain hose/connection leaking?
3) Is condensate drain hose clogged or restricted?
4) Is condensate drain hose insulated?
5) Is the 3" hole at exterior wall staffed or sealed?
Noise is heard at indoor unit.
1) Is the fan motor or compressor relay energized?
2) Is it due to temperature change that causes part expansion
or contraction?
Phenomenon
Normal or Abnormal
1) Harsh sound is heard;
2) Bad odor is smelt;
3) Water is leaked out of indoor unit;
4) Circuit breaker trips or fuse is blown few times;
5) Wires or connections are very hot;
6) Oil or refrigerant leakage is found;
7) Unit vibrates abnormally;
8) Other abnormal situations.
Must stop all unit operations, disconnect power and contact your service technician, in the
following situations:
CHECKING UNITS PRIOR TO CONTACTING YOUR TECHNICIAN
UNIT MAINTENANCE &
SER
VICE GUIDE
EXPLOSIVE VIEW AND SPARE PARTS LIST
WMMS-09EW-V2B(59)(2)
P34 OF 46
YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
NOTE:
The above is for illustration purpose. Please check against actual unit or YMGI technical support for
confirmation of exact part model / code.
