EF3
Pump Fault (Input Terminal S3)
Yaskawa · iQpump1000 AC Drive
What does EF3 mean?
An external fault has been triggered at multi-function input terminal S3 by an external device. This condition is signaled to the drive, potentially as a minor fault or a full fault depending on drive configuration.
Common Causes
- An external device connected to input terminal S3 has tripped an alarm function
Repair Steps & Checklist
Click steps to track your progress.
- 1
Identify and remove the root cause of the external fault condition reported by the device connected to input terminal S3.
- 2
Reset the fault on the drive keypad or via control input.
Verified technical data. Last updated: March 2026
Related Faults
Source: Yaskawa iQpump1000 AC Drive