Rockwell Automation Liqui-Flo AC GP Vector Drive Version 6.4 - Manual (Page 178)

5-6 LiquiFlo AC Drive, Software Reference Version 6.4
5.3 Accessing, Reading, and Clearing the Faults in the
Error Log
The following procedure shows how to access and clear the error log. Note that you
cannot clear a single entry from the error log. The entire log, including all the fault
codes and the day and time stamp of each fault, will be cleared simultaneously using
this procedure.
UAr Spurious host PC
comm interrupt Regulator board failure. Replace Regulator board.
UbS Asymmetrical bus
fault. Look at the 3
LEDs on the Power
Module Interface
board. They
indicate which fault
has occurred by
flashing in unison.
1 = Input Ground
Fault;
2 = Asymmetrical
Bus;
3 = Slow Ramp
Rate of DC Bus
One of 3 different faults has ocurred:
1. Input Ground Fault - Excessive
current flowing between any one of the
three input phases and earth ground.
2. Asymmetrical Bus - When
measuring between the cap bank
midpoint and the +DC bus and -DC
bus, there is a 200 V or greater
mismatch.
3. Slow Ramp Rate of DC Bus - DC
bus did not change to the full value
given time allowed. Can occur only at
power-up.
1. Check the connection from the
current transformer to the Bus Control
board.
2. Replace shorted capacitor, fix loose
connection, or replace bad discharge
resistor.
3. Turn on drive.If UbS is displayed,
turn drive off and then on again very
quickly. If the UbS fault goes away and
the DC bus charges, replace the Bus
Control board.
Table 5.2 – List of Fault Codes (Continued)
Code
Fault
Description Fault Cause Corrective Action
Step 1. Press the PROGRAM key.
The First Menu General parameters are
displayed. The PROGRAM LED will turn on. P.---
Forward
Reverse AUTO
MAN
ENTER
RUN
JOG
PROGRAM
START
STOP
RESET
SPEED
VOLTS
AMPS
Hz
Kw
TORQUE
Password
RUNNING
REMOTE
JOG
AUTO
FORWARD
REVERSE
PROGRAM
RELIANCE
ELECTRIC