A: 1. manual bypass, set P13.11 manually to bypass the corresponding unit group 
2. automatic bypass, when the VFD unit fails, the VFD automatically bypasses the corresponding unit group 
3. neutral point bypass, when a unit fails, the VFD automatically fails the unit 
Caution, 
1. bypass up to 2 groups of units 
2. when the unit communication fails, the unit can not receive bypass commands and can not be bypassed 
3. after neutral point bypass, you need to set P13.10 = 0, and then set P13.11 to reset the unit bypass status. Cannot be bypassed 3. After neutral point bypass, you need to set P13.10=0 and then set P13.11 to reset the unit bypass status.