Midea VRF Series

V6R VRF 50/60Hz
110
Midea
V6R
Series Service Manual
L2: DC bus high voltage protection
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.
Figure 6-2.7: Inverter module terminals
8-12HP
14-18HP
L2 protection
The power supply is abnormal
Check the power supply
equipment
The DC bus voltage (P, N) is abnormal
1
Replace the 3-phase bridge
rectifier
Replace the inverter module
No
No
Yes
Yes
U V W
P
N
U V W
P
N