TREND NX Variable Speed Drives - Manual (Page 120)

FAULT TRACING vacon • 103
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9
9. FAULT TRACING
When a fault is detected by the frequency converter 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
code
Fault Possible cause Correcting measures
1 Overcurrent Frequency converter has detected too
high a current (>4*I
H
) in the motor cable:
− sudden heavy load increase
− short circuit in motor cables
− unsuitable motor
Check loading.
Check motor.
Check cables.
2 Overvoltage The DC-link voltage has exceeded the
limits defined in Table 4-7.
− too short a deceleration time
− high overvoltage spikes in supply
Make the deceleration time longer. Use
brake chopper or brake resistor (avail-
able as options)
3 Earth fault Current measurement has detected that
the sum of motor phase current is not
zero.
− insulation failure in cables or motor
Check motor cables and motor.
5 Charging
switch The charging switch is open, when the
START command has been given.
− faulty operation
− component failure
Reset the fault and restart.
Should the fault re-occur, contact the
distributor near to you.
Please visit:
http://www.vacon.com/wwcontacts.html
6 Emergency
stop Stop signal has been given from the
option board.
7 Saturation trip Various causes:
− defective component
− brake resistor short-circuit or
overload
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
8 System fault - component failure
- faulty operation
Note exceptional fault data record, see
7.3.4.3.
S1 = Feedback of motor voltage
S2 = Reserved
S3 = Reserved
S4 = ASIC trip
S5 = Disturbance in VaconBus
S6 = Feedback of charging switch
S7 = Charging switch
S8 = No power to driver card
S9 = Power unit communication (TX)
S10 = Power unit communication (Trip)
S11 = Power unit comm. (Measurement)
Reset the fault and restart.
Should the fault re-occur, contact the
distributor near to you.
Please visit:
http://www.vacon.com/wwcontacts.html