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The period of defrosting
Four-way valve
Compressor
Outdoor Unit
30s
30s
15s
30s
60s
Indoor Unit
7min
3min Set fan speed
Run
Stop
T
preset
+5
T
preset
+2
Stop heating
Original operating status
Start heating
Run
Indoor fan
valve
Outdoor fan
Compressor
Stop
min.
min.
min.
T
amb
.
.
n
i
m
.
n
i
m
preset wind
preset wind
Reversing
