User Manual
86 Rockwell Automation Publication 20B-UM002G-EN-P - July 2014
Chapter 2 Troubleshooting
Fault Descriptions
Table 2 - Fault Types, Descriptions and Actions
Fault
No.
Type
(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
page 60
.
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
Tri es].
Enable/Disable with [Fault Config 1] on
page 52
.
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 page 12
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.