Vacon NX - Page 49

Fault codes and software
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FIGURE 9. Fault code F7
Interference caused the
problem. Possible causes,
power board, power module
or internal cables.
F7 Saturation fault
NOTE!
Earthfault in brakeresistor
or fault in brake chopper
can be indicated with F7.
F7 displayed.
Check logged
data in
fault history.
Measure
isolation
resistance and
resistance on
the brake
resistor
Were
measurements
OK?
Fault caused by faulty
brake resistor.
Change it.
NO
Measure brake
chopper.
Is brake
chopper used?
YES
NO
Replace broken
power module and
power board.
Were all
measurement
s OK?
NO
YES
YES
FR9-FR13
FR4-FR8
No instructions
available!
Measure
power module
directly from its
terminals.
Replace broken
power module and
power board.
Were all
measurement
s OK?
NO
YES
Check capacitors.
Replace the
broken ones.
Give start
command and run
nominal
frequency.