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© 2007 TB Wood’s All Rights Reserved
Chapter 8: Troubleshooting
8.1
X4 Fault Codes
Table 8-1 shows the fault codes that may be displayed during X4 AC drive operation, along with
suggestions for recovering from the fault condition.
When faults occur, you can access the status parameters that are saved along with the fault
(Advanced Fault history). To view these parameters, which store the drive’s status at the time of the
fault, view
Fault History
, and select
Last Fault
. Press the
Shift
key while viewing the last fault, and
then use the
UP
and
DOWN
arrow keys to scroll through the stored drive status parameters. Press
the
Shift
key again to return to the programming mode fault parameter.
Table 8-1: X4 Fault Codes (Page 1 of 5)
Code
Fault Display
Description
Adv. Fault
Code
Explanation
Suggestions for Recovery
1
System
System fault
0,1,2
Internal microprocessor problem
Consult factory for repair or
replacement.
3
Thermistor profile incorrect
Consult factory for repair or
replacement.
2
EE Checksum
Checksum error
0
Memory problem when reflashing
the drive’s memory
• Reset drive to factory settings.
• Consult factory.
1,2,3
Conflict in drive’s memory
• Reset drive to factory settings.
• Consult factory.
4
Unable to write an EE parameter
after a parameter has been
changed through the keypad or
SIO
• Reset drive to factory settings.
• Consult factory.
5
The drive is receiving EE write
requests faster than they can be
processed. This would typically
be caused by writing parameters
too frequently through Modbus.
Slow down the frequency of
Modbus writes.
3
Curr Calibr
Current calibration
fault
0
Current calibration fault on phase
T1/U
• Check the motor connections to
the terminal strip of the drive
and at the motor.
• Have motor checked.
• Consult factory for repair or
replacement of drive.
1
Current calibration fault on phase
T2/V
2
Current calibration fault on phase
T3/W
4
Power Supp
Power supply fault
0
5V supply is below 4 Vdc for more
than 100 ms
• Increase resistance between
REF and analog inputs.
• Check wiring to REF terminals.
• Consult factory.
6
IOC Trip
Instantaneous
overcurrent trip
0
Short circuit was detected on
power-up
• Remove the short from the
power wiring
• Check for shorted motor
• Consult factory.
1
Short circuit was detected during
operation
7
MOL
MOL contact fault
0
The MOL digital input was
activated, depending on pull-up or
pull-down logic configuration
Reset MOL contact or remove
condition causing the MOL
contact activation.
Note: Shaded faults are auto-resettable, except where noted.