Vacon NX Service Manual

Fault codes and software
24h on-call service phone: +358 (0)40 83 71 150
50
4
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.

Vacon NX Specifications

General

Product Type	AC Drive
Control Method	Scalar Control
Enclosure	IP00, IP21
Communication	Ethernet
Safety	STO (Safe Torque Off)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short Circuit
Ambient Temperature Range	-10°C to +50°C (with derating above +40°C)
Cooling Method	Air-cooled, Liquid-cooled