PowerFlex 525 F033 Auto Rstrt Tries: What It Means

Q: What causes Allen-Bradley (Rockwell Automation) PowerFlex 525 fault F033?

1. A recurring underlying fault: Read b008, b009 and F604–F610 to find the fault that kept recurring, then use that fault’s troubleshooting. 2. Supply problems that outlast the restart delay: Compare A542 [Auto Rstrt Delay] with how long the supply disturbance lasts, and fix the supply. 3. Restart delay too short for the condition to clear: Find why the drive or motor is overheating; a longer delay only hides it.

Technical review pending. This guide is based on the cited manufacturer documentation; check it against the manual for your exact model and firmware before acting.

Fault F033 on a PowerFlex 525 is Auto Rstrt Tries: the drive tried to reset a fault and resume running for the number of attempts set in A541 [Auto Rstrt Tries] and did not succeed. It is a Type 2 fault; Rockwell’s action is to correct the cause of the original fault and clear it manually.

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Upload a keypad photo, the fault history or a parameter export from your Allen-Bradley (Rockwell Automation) PowerFlex 525. InduQT compares the evidence and suggests the next useful checks.

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When it happens

After repeated Type 1 trips with auto restart enabled
Often on unattended equipment (pumps, fans) after supply or load problems

Likely causes and checks

1A recurring underlying fault

Points to it: The fault queue shows the same Type 1 fault repeated before F033.
Check: Read b008, b009 and F604–F610 to find the fault that kept recurring, then use that fault’s troubleshooting.

2Supply problems that outlast the restart delay

Points to it: Underlying faults are F004 or F005.
Check: Compare A542 [Auto Rstrt Delay] with how long the supply disturbance lasts, and fix the supply.

3Restart delay too short for the condition to clear

Points to it: Underlying fault is F008 Heatsink OvrTmp or F007 Motor Overload.
Check: Find why the drive or motor is overheating; a longer delay only hides it.

Telling it apart

F033 is not a root cause. The useful information is the fault the drive kept retrying, stored in the fault queue.
Type 2 faults (for example F012, F038–F043) are never auto-reset, so they do not lead to F033.

Relevant parameters

Parameter	Name	Why it matters
A541	[Auto Rstrt Tries]	Maximum reset/restart attempts (0–9). The manual warns to consider codes and standards before using it.
A542	[Auto Rstrt Delay]	Time between attempts (0.0–120.0 s).
A551	[Fault Clear]	1 resets the active fault; 2 also clears the fault buffers.

Evidence to collect

Full fault queue b007–b009 and F604–F610 with time stamps (F611–F630)
A541 and A542 settings
Whether the application is safe for automatic restart

Work on fuel trains, burners, pressure vessels and electrical equipment must be done by qualified personnel following the manufacturer’s documentation and local codes. Never bypass a safety device or interlock.

Allen-Bradley (Rockwell Automation) PowerFlex 525 fault F033: Auto Rstrt Tries