Midea MV5-X252W/V2GN1 Service Manual page 72

4.11.7 xL1/xL4 troubleshooting
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.
Step 2: Check rectifier wiring circuit
 If the wires are loose, fasten the wires. If the wires are OK, replace the main PCB.
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Figure 5-4.8: Inverter module terminals
N1
P1
U V W
P
Figure 5-4.9: Inverter module terminals
P
Figure 5-4.10: Rectifier and AC filter board in electric control box
Check 3-phase bridge
rectifier wiring
Check AC filter
board wiring
N
N
V5 X VRF 50/60Hz
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