Service manual


GB
delay after speed change.
4. The control of outdoor fan motor as figure 6 during defrost process.
Speed table of outdoor fan motor
indoor unit
capacity
outdoor ambient
<2hp ≥2hp ≥3hp
heating Speed grade
T≥68
O
F lo� lo� middle
54
O
F≤T<68
O
F lo� middle high
T<54
O
F middle high high
Control of reverse valve(figure 5)
1. The reverse valve is ahead run 20 seconds before compressor turn on.
2. After compressor turn off, the reverse valve delay 60 seconds shutdo�n.
3. The control of reverse valve as figure 6 during defrost process.
compressor
outdoor FM
reverse valve
20s 30s 30s
figure 5