Midea V6 Series

V6 VRF 50Hz
101
Part 6 - Diagnosis and Troubleshooting
L1: DC bus low voltage protection 2.15.7
Note:
1. The normal DC voltage between terminals P and N on inverter module should be 450-650V. When the voltage is lower than 350V, L1
protection will be appeared.
Figure 6-2.6: Inverter module terminals
L1 protection
The power supply is abnormal
Check the power supply
equipment
No output from bridge rectifier
Replace the inverter module
No
No
No
Yes
Yes
Yes
Yes
The DC bus voltage (P, N) is abnormal
1
The reactor performs well
Replace the
reactor
No