BGH BV-V28W/DHN1 Service Manual page 38

VRF 50/60Hz
Figure 5-1.3: 36/42 model outdoor unit Communication converter board PCB Ports
Table 5-1.3: 36/42 model communication converter board PCB ports
Label in
Figure 5-1.3
1
2
3
4
5
38
Port code
CN1 R T communica on port
P Q E X Y E communica on port（with main board）
CN2
CN3 O A communica on port（reserved）
P Q E X Y E communica on port
CN4
CN300 Chip burning port
Content Port voltage
2.5-2.7V DC
2.5-2.7V DC
2.5-2.7V DC
2.5-2.7V DC
5V DC