X4 AC Drive User’s Manual
Chapter 8: Troubleshooting
1428D-0607
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© 2007 TB Wood’s All Rights Reserved
25
Comm Loss
Communication loss
0
This fault occurs when the drive is
in a serial link control path and the
amount of time since the last
Modbus comm. exceeds the time
set in parameter 903 (SIO Timer).
Check connections to the Modbus
port. Adjust value of parameter
903 (SIO Timer) as needed.
26
Regen Time
Regen timeout
0
This fault occurs if the drive takes
more time to decelerate to a stop
than is allowed. The timeout is
determined by the longest
deceleration ramp time (Decel1 or
Decel2) plus the Regen Timeout
parameter.
Reduce the amount of
regenerative energy or iincrease
the Regen timeout parameter.
27
Pwr Bridge
Power bridge fault
0,1,2
The drive detected a failure in the
output power devices.
Check for failed input power
device.
28
Drive TOL
Drive timed overload
0
The drive sensed an overload that
exceeded the drive rating.
Check that load conditions do not
exceed the drive’s rating (120%
for 60 seconds from nameplate
current rating for normal duty and
150% or rated current for 60
seconds heavy duty).
29
Stuck Key
Stuck key error
0
This fault occurs if a key press is
detected upon power-up. This
would occur because of a
defective keypad or because
someone was holding down a key
when powering-up the drive.
Check for stuck keypad and repair
or replace. Consult factory.
30
Param Range
Parameter out of
range
0
One of the customer parameters
is out of range.
Check for a parameter value
saved out of the standard range.
Reset parameters to factory
default. Consult factory.
31
Pwr Wiring
Power wiring error
0
This fault flags a problem with the
drive wiring.
Check that input power wiring is
not connected to load power
terminals. Consult factory.
1
This fault can occur if an IOC fault
is detected during the power
wiring test.
32
Low Voltage
Low voltage trip
0
This fault occurs if a power dip
occurs when the drive is
operating, and the drive is not
able to ride through the power dip
before shutting off outputs.
Verify that input line power is
within the drive’s specifications.
Add a transformer or reduce
demands to power feed. Consult
factory.
33
1Ph Overload
1Ph overload
0
If the user configures parameter
517 (Single Phase) for single-
phase operation, this fault occurs
if the bus voltage ripple is outside
the limit of the drive.
Check that input power demand
does not exceed the drive’s
capacity for single-phase
operation. Consult factory.
34
RS Meas. Fail
Stator resistance
measurement failed
0
If the drive cannot measure the
stator resistance properly, this
fault occurs.
Try the routine again and if the
fault occurs twice, consult the
factory.
Table 8-1: X4 Fault Codes (Page 4 of 5)
Code
Fault Display
Description
Adv. Fault
Code
Explanation
Suggestions for Recovery
Note: Shaded faults are auto-resettable, except where noted.