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3.2.6 Defrosting operation flow chart:
Unitary
Beginning
End
60s
60s
30s
inverter compressor
indicated FQY
defrosting FQY 85 Hz（E ）
soft startup
50HZ
32HZ
10s
outdoor fan motor
ON
send signal to indoor unit
auto
OFF
4-way valve
ON
OFF
ON
Unload valve SV1
OFF
auto
250pulse（E ）
PMV auto open angle
auto open angle
Indoor fan motor
ON
OFF
anti-cold air function
232
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