Haier 1U71S2SG1FA Service Manual page 217

2.3.7 Defrosting operation flow chart:
Unitary
Inverter compressor
Outdoor fan motor
4-way valve
Unload valve SV1
PMV auto open angle
Indoor fan motor
OFF
Beginning
60s
30s
Indicated FQY
50HZ
10s
ON
OFF
ON
OFF
ON
OFF
ON
Defrosting FQY 85 Hz （ E）
32HZ
Send signal to indoor unit
250pulse（E）
214
End
60s
Soft startup
Auto
Auto
Auto open angle
Anti-cold air function