Fault Tracing - Honeywell NX series User Manual

9
84(86)
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
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 can be found 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 faults written in white on black background may appear as
both A and F fault.
Fault Fault
code
1 Overcurrent
2
Overvoltage
3 Earth fault
5 Charging switch
6 Emergency
stop
7 Saturation trip
8 System fault
9
Undervoltage
10 Input line
supervision
11 Output phase
supervision
12
Brake chopper
supervision
13 Frequency
converter
under-
temperature
Fault tracing
Possible cause
Frequency converter has detected too
high a current (>4*I ) in the motor cable:
n
sudden heavy load increase
short circuit in motor cables
unsuitable motor
The DC-link voltage has exceeded the
limits defined in Table 4-1.
too short a deceleration time
high overvoltage spikes in utility
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.
Very high overload
Defective component
The frequency converter troubleshooting
system is unable to locate the fault.
DC-link voltage is under the voltage limits
defined in.
most probable cause: too low a
supply voltage
frequency converter internal fault
Input line phase is missing.
Current measurement has detected that
there is no current in one motor phase.
no brake resistor installed
brake resistor is broken
brake chopper failure
Heatsink temperature is under –10 C
Reset button
Correcting measures
Check loading.
Check motor size.
Check cables.
Make the deceleration time longer.
Check motor cables and motor.
Reset the fault and restart.
Should the fault re-occur, contact your
nearest distributor.
Cannot be reset from the keypad.
Switch off power. If this does not help
contact your nearest distributor.
Reset the fault and restart.
Should the fault re-occur, contact your
nearest distributor,
In case of temporary supply voltage
break reset the fault
the frequency converter. Check the
supply voltage. If it is adequate, an
internal failure has occurred.
Contact your nearest distributor..
Check supply voltage and cable.
Check motor cable and motor.
Check brake resistor.
If the resistor is ok, the chopper is faulty.
Contactyour nearest distributor.
on the control
and restart