Bosch R32 - E7 (Indoor PCB;Display Board Communication Error)

50 CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08)
Troubleshooting
5.5.7 E7 (Indoor PCB /Display board communication error)
Description: Indoor PCB does not receive feedback from Display board for 120 seconds.
Possible defects:
• Wiring mistake
• Faulty PCB
• Display board malfunction
Troubleshooting and repair:
NO
NO
YES
YES
YES
The unit is operating normally.
Replace the Display board.
Is it still displaying
the error code?
Are all the connections
good?
Is the error
extinguished?
Power off, then restart the unit
2minutes later.
Check the wirings and connection.
Replace the indoor main PCB.
Correct the connection or replace
theWirings.