Midea V6R VRF Series Service Manual page 104

Procedure
Communication wire from outdoor main
PCB CN26 to inverter module CN8/CN9 is
Both LED1 and LED2 on inverter module
are off when power on.
Replace the outdoor main PCB, is the
malfunction solved?
Replace the inverter module
Replace filter board.
Notes:
1. Communication wire from outdoor main PCB CN26 to inverter module CN8/CN9.
Communication port CN26 on outdoor main PCB
2. LED1/2 on inverter module
3. Check the power supply for the compressor inverter module, the normal voltage L2 and N (CN4/CN6) 198v-242V.
H0
No
1
loosened.
No
2
No
No
No
Yes
Reconnect the communication wire.
Yes
Check the power supply circuit.
Yes
Yes
Communication port CN8/CN9 on inverter module
V6R VRF 50Hz
3
Normal.
Normal.
103