ABB DCS880 - Fieldbus Control Status and Words; Fieldbus Main Control and Status

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Exchange thyristors sizes H1 … H4
3ADW000488R0101 DCS880 Service manual e a
Remove faulty thyristor modules
1. Remove control panel and design cover.
2. Disconnect all I/O plugs from the control
unit.
3. Disconnect all connections from present
plug in options.