Communication Error Between Indoor Unit And Up-Down Panel; Up-Down Panel Is Defective - koppel KV24 ODU-ARF21C Service Manual

Troubleshooting
2.4.2 For the super-slim cassette with up-down panel

2.4.2.1 Communication error between indoor unit and up-down panel

F7 F0 Displayed
Communication failure between
indoor unit and up-down panel
Check the wire connection
between up-down panel and No Correct the connection
indoor unit, is it right?
Yes
Replace the up-down panel No Replace the indoor main PCB

2.4.2.2 Up-down panel is defective

F8
108 Electrical Control System