AJF
Anti-Jam Fault
Yaskawa · iQpump1000 AC Drive
What does AJF mean?
The drive was not able to clear debris from the impeller in fewer than the number of attempts set in P7-02. This fault is effective only when P7-01 (Anti-jam Operation) is set to 1 (enabled).
Common Causes
- Debris in the pump impeller preventing proper pump operation.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check for proper pump operation and remove debris from the pump impeller.
- 2
Set the Anti-jam fault characteristics in parameters P7-02 to P7-08.
- 3
Control drive response to this condition using P7-01 (Anti-jam Operation Selection).
Verified technical data. Last updated: March 2026
Related Faults
Source: Yaskawa iQpump1000 AC Drive