Fault Tracing - Vacon 20 X Installation, Technical And Maintenance Manual

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8.4.8

Fault tracing

Fault
Fault name
code
1 Overcurrent
Overvoltage
2
Earth fault
3
System fault
8
Undervoltage
9
10 Input phase
AC drive under-
13
temperature
AC drive overtem-
14
perature
15 Motor stalled
Motor overtemper-
16
ature
Motor Underload
17
19 Power overload
Service support: find your nearest Vacon service center at www.vacon.com
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
The DC-link voltage has exceeded the lim-
its defined.
• too short a deceleration time
• brake chopper is disabled
• high overvoltage spikes in supply
• Start/Stop sequence too fast
Current measurement has detected that
the sum of motor phase current is not
zero.
• insulation failure in cables or motor
Component fault
Malfunction
DC-link voltage is under the voltage limits
defined.
• most probable cause: too low a sup-
ply voltage
• AC drive internal fault
• defect input fuse
• external charge switch not closed
NOTE!
This fault is activated only if the
drive is in Run state.
Input line phase is missing.
Too low temperature measured in power
unit's heatsink or board. Heatsink temper-
ature is under -10°C.
Too high temperature measured in power
unit's heatsink or board. Heatsink temper-
ature is over 100°C.
Motor is stalled.
Motor is overloaded.
Motor is under loaded
Supervision for drive power
Table 32. Fault codes and descriptions.
vacon • 80
Remedy
Check loading.
Check motor.
Check cables and connections.
Make identification run.
Check ramp times.
Make deceleration time longer.
Use brake chopper or brake resis-
tor (available 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.
In case of temporary supply volt-
age break reset the fault and
restart the AC drive. Check the
supply voltage. If it is adequate, an
internal failure has occurred.
Contact the distributor near to
you.
Check supply voltage, fuses and
cable.
Check the ambient temperature.
Check the correct amount and
flow of cooling air.
Check the heatsink for dust.
Check the ambient temperature.
Make sure that the switching fre-
quency is not too high in relation
to ambient temperature and
motor load.
Check motor and load.
Decrease motor load.
If no motor overload exists, check
the temperature model parame-
ters.
Check load.
Drive power is to high: decrease
load.
8