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Service Manual
Bosch Climate 5000 Series Ductless Air Conditioner / Heat Pump Multi Zone Outdoor Units (01.2023)
8.6.18 Communication malfunction between adapter board and outdoor
main control board (ODU Ed)
Error Code ODU Ed
Malfunction decision conditions If outdoor PCB does not receive feedback from adapter board.
Supposed causes
f Wiring mistake
f Faulty PCB
Table 46
Troubleshooting:
Figure 84
YES
Poweroff,thenrestart theunit after 3
minutes.
Does theerrorstill
exist?
Replacethe outdoormaincontrol
board
Does aproblem remain? Theunitisoperating normallyNO
Check thewirings andconnections
YES
Are all the
connectionsgood?
Ensure proper connectionsNO
YES
Replacethe adaptermain
PCB
Theproblem is solvedNO
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