Midea MV6-i900WV2GN1-E - Page 80

V6-i VRF 50/60Hz
79
Part
6 - Diagnosis and Troubleshooting
Procedure 2.5.5
E5
ODU power supply is abnormal or a
phase is missing
1
Yes
Provide normal power supply
No
Wires between outdoor main PCB, AC
filter boards and electric control box
power supply terminals are loose
Yes
Ensure the wires are connected properly
No
High voltage circuit error has occurred,
such as the compressor has
malfunctioned
2
, the fan motor has
short-circuited
3
, or the inverter module
has short-circuited
4
Yes
Replace or repair the relevant parts
No
Replace outdoor main PCB
Notes:
1. The normal voltage between A and N, B and N, and C and N is 198-242V.
2. The normal resistances of the inverter compressor are 0.7-1.5Ω among U V W and infinite between each of U V W and ground. If any of the resistances
differ from these specifications, the compressor has malfunctioned.
3. The normal resistances of the fan motor coil among U V W are less than 10Ω. If a measured resistance is 0Ω, the fan motor has short-circuited.
4. Set a multi-meter to buzzer mode and test any two terminals of P N U V W of the inverter module. If the buzzer sounds, the inverter module has
short-circuited.
Figure 6-2.1: Inverter module terminals