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well Bosch codes are never easy but from some digging am getting hits on a communication error
try checking connections between the boards
Dave
Well just to close this one off – I don’t know for definate which component was the cause but I replaced all of the electrolytic caps and the 3 larger relays on the main board and it appears to have cured it.
Jem
I wondered about that but the caps measured okay both on capacitance and ESR results, my suspicion is more with relay bounce (not cleanly switching) but I couldn’t prove it and the machine was too far away to make multiple trips to test either theory, either way I fitted the module back to the machine last friday, I know that they were going to be using it all weekend and have heard nothing to say that it has failed yet.
Jem
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