Midea MFGA-60ARDN1-QC2 Service Manual page 38

8.2.3.3 Ending Of Defrosting Condition (Only if one of the following items is satisfied):
(1) Time of defrosting lasts 10 minutes.
(2) Temperature of outdoor coil T3 is up to 15°C.
(3) AC has changed to other modes or shut off.
8.2.3.4 PTC function
(1) Open conditions: (If all the following conditions are satisfied, the PTC will open)
¬ Indoor fan is on
¬ Compressor is on
¬ Indoor evaporator temperature T2 ≤40
¬ T1-3≤ TS-6 ℃
(2). Close conditions: (If one of the following conditions is satisfied, the PTC will close)
¬ T1-3>TS
¬ No capacity requirement
¬ compressor is off
¬ Indoor fan is off
¬ Indoor evaporator temperature T2 > 52
If the PTC opens, the indoor fan will be closed 15sec delay.
8.2.4 Cooling Mode
1 Four-way valve is closed.
8.2.4.
If four-way valve is open before the machine enters cooling mode, then four-way valve will
35