Fault descriptions – Rockwell Automation 20B PowerFlex 700 AC Drives Vector Control (v4.001 and up) User Manual
Page 86
86
Rockwell Automation Publication 20B-UM002G-EN-P - July 2014
Chapter 2
Troubleshooting
Fault Descriptions
Table 2 - Fault Types, Descriptions and Actions
Fault
No
.
Ty
pe
(1)
Description
Action
Analog In Loss
29
1
3
An analog input is configured to fault
on signal loss. A signal loss has
occurred.
Configure with [Anlg In 1, 2 Loss] on
.
1. Check parameters.
2. Check for broken/loose connections at
inputs.
Anlg Cal Chksum
108
The checksum read from the analog
calibration data does not match the
checksum calculated.
Replace drive.
Auto Rstrt Tries
33
3 Drive unsuccessfully attempted to reset
a fault and resume running for the
programmed number of [Flt RstRun
Tries].
Enable/Disable with [Fault Config 1] on
.
Correct the cause of the fault and manually
clear.
AutoTune Aborted
80
Autotune function was canceled by the
user or a fault occurred.
Restart procedure.
Auxiliary Input
2
1 Auxiliary input interlock is open.
Check remote wiring.
Cntl Bd Overtemp
55
The temperature sensor on the Main
Control Board detected excessive heat.
1. Check Main Control Board fan.
2. Check surrounding air temperature.
3. Verify proper mounting/cooling.
DB Resistance
69
Resistance of the internal DB resistor is
out of range.
Replace resistor.
Decel Inhibit
24
3 The drive is not following a
commanded deceleration because it is
attempting to limit bus voltage.
1. Verify input voltage is within drive
specified limits.
2. Verify system ground impedance
follows proper grounding techniques.
3. Disable bus regulation and/or add
dynamic brake resistor and/or extend
deceleration time. See the Attention
statement on
for further
info.
Drive OverLoad
64
Drive rating of 110% for 1 minute or
150% for 3 seconds has been exceeded.
Reduce load or extend Accel Time.
Drive Powerup
49
No fault displayed. Used as a Power Up Marker in the Fault Queue indicating that the
drive power has been cycled.
Excessive Load
79
Motor did not come up to speed in the
allotted time during autotune.
1. Uncouple load from motor.
2. Repeat Autotune.
Encoder Loss
91
Requires differential encoder. One of
the two encoder channel signals is
missing.
1. Check Wiring.
2. Check motor rotation.
3. Check encoder pulses, rotation, etc.
4. Replace encoder.
Encoder Quad Err
90
Both encoder channels changed state
within one clock cycle.
1. Check for externally induced noise.
2. Replace encoder.
Fatal Faults
900-
930
2 Diagnostic code indicating a drive
malfunction.
1. Cycle power.
2. Replace Main Control Board.
3. Contact Tech Support.
Faults Cleared
52
No fault displayed. Used as a marker in the Fault Queue indicating that the fault clear
function was performed.
Flt QueueCleared
51
No fault displayed. Used as a marker in the Fault Queue indicating that the clear
queue function was performed.
FluxAmpsRef Rang
78
The value for flux amps determined by
the Autotune procedure exceeds the
programmed [Motor NP FLA].
1. Reprogram [Motor NP FLA] with the
correct motor nameplate value.
2. Repeat Autotune.