Vacon NX - 6. Electrical Cabling and Connections; 6.1 Power Unit; 6.1.1 Power Connections

Fault codes and software
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77
4
F43 Encoder fault
F43 displayed.
Check
subcode.
Visible fault on
encoder cable?
NOTE:
1: Channel A missing
2: Channel B missing
3: Both channels missing.
4: Encoder reversed.
5: Board is missing
Take corrective
actions based on
subcode.
Check state of
optioncard.
Encoder or cabling fault.
Pulses OK?
Optioncard faulty
YES
YES
NO
NO
Measure
encoder
pulses.
Is status "run"?
NO
YES
FIGURE 36. Fault code F43