Midea VC Pro MVC-224WV2WN1 Service Manual page 85

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 240-375V. When the voltage is higher than 500V, L2
protection will be appeared.
Yes Check the power supply
equipment
Yes Replace the 3-phase bridge
1
rectifier
Figure: Inverter module terminals
VC Pro VRF 50/60Hz
85