Midea V6 Series Service Manual page 103

V6 VRF 50Hz
2.15.8 L2: DC bus high voltage protection
L2 protection
The power supply is abnormal
No
The DC bus voltage (P, N) is abnormal
No
Replace the inverter module
Note:
1. The normal DC voltage between terminals P and N on inverter module should be 450-650V. When the voltage is higher than 700V, L2
protection will be appeared.
102
Yes Check the power supply
equipment
Yes Replace the 3-phase bridge
1
rectifier
Figure 6-2.7: Inverter module terminals