Error code reference

Merloni Oven Error Code ER72

Communication fault between display board and conversion board (Touch models only).

First step from the service manual

Verify connection between conversion board and main board.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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ER72 on my Merloni Oven

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Communication fault between display board and

From Service Manual 634416, p.28:

1.Verify connection between conversion board and main board.

2.Inspect the communication harness between the main control and the UI board for bent pins or unseated connectors at each end.

3.Measure supply voltage to the UI board. Expected: 5 VDC at the interface connector; a low or missing rail points back to the main control supply.

Part W10811169

User interface control board

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