Midea V4+R Series - 4.19.7 xL1;xL4 troubleshooting

V4+R VRF 50/60Hz
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Midea V4+R Series Service Manual
Figure 5-4.8: Inverter module terminals
xL1/xL4 troubleshooting 4.19.7
Step 1: Check inverter module
 Check the DC voltage between terminals 1 and 2. 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
Check 3-phase bridge
rectifier wiring
Check AC filter
board wiring
3
5
1
2
4
N
P
3
5
1
2
4
N
P