Vacon NX - Page 80

Fault codes and software
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4
F51 External fault
F51 displayed.
Check data in
fault history.
External fault. Replace
external appliance or its
cable.
Value
OK?
Measure input value at
corresponding I/O-terminal.
Note: F51 can be used as CC
or OC.
Internal fault. Replace
faulty optionboard.
NO YES
FIGURE 40. Fault code F51