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In order to have the effect heating operation, need defrosting control.
During defrosting, four-way valve power off, outdoor fan stop, indoor fan stop, outdoor PMV open to 470pls.
15.3 Defrosting control
15.3.1 Entering condition:
15.3.2 Defrosting control
15.3.3 Quit defrosting
Tao≤20°C
OR
■
OR
■
After defrosting operation 10min
■ Outdoor Te≥15
°C, for 1min continuously
■ Outdoor Te≥20
°C, for 30s continuously
■ Outdoor Te≥30
°C, for 5s continuously
■ Tc ≥ 54°C
■
OR
■
OR
■
&
After heating startup 60min
C: -23≤Tao<15°C, Te≤(Tao-69)/4 For 5min continuously
D: Tao<23°C, Te≤-23°C For 5min continuously
Outdoor Te≥10°C, for 1min continuously
Outdoor Te≥15°C, for 10min continuously
X:During the oil return operation meets the following condition, the
cumulative operation time reset
B: -15≤Tao<6°C, Te≤(5Tao-72)/7 For 5min continuously
A: Tao≥6°C, Te≤-10°C For 5min continuously
Last defrosting~ heating cumulative operation time is more than 60 minutes
■
OR
■
OR