Midea MV5-X252W/V2GN1 - 4.11.7 xL1;xL4 troubleshooting

V5 X VRF 50/60Hz
201608 71
Part 5 - Diagnosis and Troubleshooting
Figure 5-4.8: Inverter module terminals
xL1/xL4 troubleshooting 4.11.7
Step 1: Check inverter module
 Check the DC voltage between terminals P and N. The normal value is 510-580V. If the voltage is lower than 510V, go
to Step 2.
Figure 5-4.9: Inverter module terminals
Step 2: Check rectifier wiring circuit
 If the wires are loose, fasten the wires. If the wires are OK, replace the main PCB.
Figure 5-4.10: Rectifier and AC filter board in electric control box
P1
N1
P
N
U
V
W
P
N
Check 3-phase bridge
rectifier wiring
Check AC filter
board wiring