Rockwell Automation Liqui-Flo 1.5 General Purpose and Vector Duty User Manual
Page 125
Troubleshooting the Drive
5-11
OverSpeed
Limit
25
➀
Functions such as slip
compensation or bus
regulation have attempted to
add an output frequency
adjustment greater than that
programmed in Overspeed
Limit (83).
Remove excessive load or
overhauling conditions or
increase Overspeed Limit (83).
OverVoltage
5
➀
DC bus voltage exceeded
maximum value.
Monitor the AC line for high line
voltage or transient conditions.
Bus overvoltage can also be
caused by motor regeneration.
Extend the decel time or install
dynamic brake option.
Parameter
Chksum
100
➁
The checksum read from the
board does not match the
checksum calculated.
1.
Restore defaults.
2.
Reload user set if used.
Params
Defaulted
48
The drive was commanded to
write default values to
EEPROM.
1.
Clear the fault or cycle
power to the drive.
2.
Program the drive
parameters as needed.
Phase
Imbalance
37
Phase current displayed in
Imbalance Display (221) >
percentage set in Imbalance
Limit (49) for time set in
Imbalance Time (50).
Clear fault.
Phase U to
Grnd
38
A phase-to-ground fault has
been detected between the
drive and motor in this phase.
1.
Check the wiring between
the drive and motor.
2.
Check motor for grounded
phase.
3.
Replace drive.
Phase V to
Grnd
39
Phase W to
Grnd
40
Phase UV
Short
41
Excessive current has been
detected between these two
output terminals.
1.
Check the motor and drive
output terminal wiring for a
shorted condition.
2.
Replace drive.
Phase VW
Short
42
Phase UW
Short
43
Port 1-6 DPI
Loss
81-
86
DPI port stopped
communicating.
An attached peripheral with
control capabilities via Logic
Source Sel (89) (or OIM
control) was removed.
The fault code indicates the
offending port number (81 =
port 1, etc.)
1.
If adapter was not
intentionally disconnected,
check wiring to the port.
Replace wiring, port
expander, adapters, Main
Control board or complete
drive as required.
2.
Check OIM connection.
Table 5.6 – Fault Descriptions and Corrective Actions (Continued)
Fault
No.
Ty
p
e
Description
Action