162 Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Chapter 4 Troubleshooting
Common Symptoms and
Corrective Actions
The drive is designed to start from the keypad when shipped. For a basic test of
drive operation:
1. Remove all user I/O wire.
2. Verify safety terminals (S1, S2, and S+) jumper is in place and tightened.
3. Verify wire jumper is in place between I/O terminals 01 and 11.
4. Verify that the three jumpers are in their proper default positions on the
control board. See PowerFlex 525 Control I/O Terminal Block
on page 41
for more information.
5. Reset default parameter values by setting P053
[Reset Defalts] to 2
“Factory Rset”.
6. If safe to do so for your application, press Start on drive keypad. Drive
will run according to the speed potentiometer.
F125 Flash Update Req 2
The firmware in the drive is corrupt,
mismatched, or incompatible with the
hardware.
Perform a firmware flash update
operation to attempt to load a valid
set of firmware.
F126 NonRecoverablErr 2
A non-recoverable firmware or
hardware error was detected. The
drive was automatically stopped and
reset.
• Clear fault or cycle power to the
drive.
• Replace drive or control module if
fault cannot be cleared.
F127 DSIFlashUpdatReq 2
A critical problem with the firmware
was detected and the drive is running
using backup firmware that only
supports DSI communications.
Perform a firmware flash update
operation using DSI communications
to attempt to load a valid set of
firmware.
(1) See Fault Types for more information.
(2) This fault may be cleared by the auto-restart routine and will be attempted only once. It ignores the value set in parameter
A541 [Auto Rstrt Tries].
(3) This fault is not applicable to PowerFlex 523 drives.
Fault Types, Descriptions, and Actions (Continued)
No. Fault
Type
(1)
Description Action
Motor does not Start
Cause(s) Indication Corrective Action
No output voltage to the motor. None
Check the power circuit.
• Check the supply voltage.
• Check all fuses and disconnects.
Check the motor.
• Verify that the motor is connected properly.
Check the control input signals.
• Verify that a Start signal is present. If 2-Wire control is used, verify that either the
Run Forward or Run Reverse signal is active, but not both.
• Verify that I/O Terminal 01 is active.
• Verify that P046
, P048, P050 [Start Source x] matches your configuration.
• Verify that A544
[Reverse Disable] is not prohibiting movement.
• Verify that safety inputs (Safety 1 and Safety 2) are active.
Improper boost setting at initial startup. None Set A530
[Boost Select] to 2 “35.0, VT”.
Drive is Faulted Flashing red status light
Clear fault.
• Press Stop if P045
[Stop Mode] is set to a value between “0” and “3”.
•Cycle drive power.
•Set A551
[Fault Clear] to 1 “Reset Fault” or 2 “Clear Buffer”.
• Cycle digital input if t062
, t063, t065...t068 [DigIn TermBlk xx] is set to
13 “Clear Fault”.
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