Fault Tracing - Vacon NX_ 0003 5 User Manual

110 • vacon
9.

FAULT TRACING

When a fault is detected by the AC drive control electronics, the drive is stopped and the symbol F
together with the ordinal number of the fault, the fault code and a short fault description appear on
the display. The fault can be reset with the Reset button on the control keypad or via the I/O
terminal. The faults are stored in the Fault history menu (M5) which can be browsed. The different
fault codes you will find in the table below.
The fault codes, their causes and correcting actions are presented in the table below. The shadowed
faults are A faults only. The items written in white on black background present faults for which you
can program different responses in the application. See parameter group Protections.
Note: When contacting distributor or factory because of a fault condition, always write down all texts
and codes on the keypad display.
Fault Fault
code
1 Overcurrent
2 Overvoltage
3 Earth fault
5 Charging
switch
6 Emergency
stop
7 Saturation trip
9
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Possible cause
AC drive has detected too high a current
(>4*I ) in the motor cable:
H
sudden heavy load increase
short circuit in motor cables
unsuitable motor
Subcode in T.14:
S1 = Hardware trip
S2 = Reserved
S3 = Current controller supervision
The DC-link voltage has exceeded the
limits defined.
too short a deceleration time
high overvoltage spikes in supply
Subcode in T.14:
S1 = Hardware trip
S2 = Overvoltage control supervision
Current measurement has detected that
the sum of motor phase current is not
zero.
insulation failure in cables or motor
The charging switch is open, when the
START command has been given.
faulty operation
component failure
Stop signal has been given from the
option board.
Various causes:
defective component
brake resistor short-circuit or
overload

FAULT TRACING

Correcting measures
Check loading.
Check motor.
Check cables.
Make identification run.
Make deceleration time longer. Use
brake chopper or brake resistor (avail-
able as options)
Activate overvoltage controller.
Check input voltage.
Check motor cables and motor.
Reset the fault and restart.
Should the fault re-occur, contact the
distributor near to you.
Check emergency stop circuit.
Cannot be reset from the keypad.
Switch off power.
DO NOT RE-CONNECT POWER!
Contact factory.
If this fault appears simultaneously with
Fault 1, check motor cables and motor