Midea MSC-21CRN1, Service Manual

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Service manual
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Auto fan at cooling mode:
Anti-freezing control to indoor evaporator at cooling mode ( T: evaporator temp. )
TE5 T
EVAP. temp. up
EVAP. temp. down
TE6
Compressor and
outdoor fan on
Compressor and outdoor
fan off (after 4 mins)
Condenser high temperature protection (cooling only type don’t have the protection):
This protection only runs in cooling mode, cooling in auto mode and turbo mode
The condition of this protection:
Under the protection the outdoor fan keeps run.
11.6 Dehumidifying mode
The 4-way valve is off in dehumidifying mode
At dehumidifying mode, the unit runs In cooling, the speed of the indoor fan is low, and the speed can’t
change.
At dehumidifying mode, the protection is the same as that of cooling mode.
At dehumidifying mode, the action of step motor is the same as that of cooling mode.
11.7 Heating mode
11.7.1 Generally, the 4-way valve is open in heating mode, but it is closed in defrosting mode. 4-way
T3
TE10
TE11
Comp
Compressor on
Comp act