EL
ErrorLib
Brands
||
  1. Home
  2. Allen-Bradley
  3. PowerFlex 4 Adjustable Frequency
  4. F2
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

F2

Auxiliary Input

Allen-Bradley · PowerFlex 4 Adjustable Frequency

What does F2 mean?

This fault indicates an issue with the auxiliary input signal. This input is typically configured via parameter A051 or A052 (Digital In1 Sel/Digital In2 Sel) with option 3 ('Aux Fault'). It signals an abnormal condition detected by the auxiliary input circuit.

Common Causes

  • Auxiliary input signal status is unexpected or faulty.
  • External auxiliary device signaling an error.
  • Auxiliary control signal not received.
  • Fault detected on an auxiliary control channel.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify all conductors connected to the digital input terminal(s) configured for 'Aux Fault' (P-A051 or P-A052, option 3) are securely terminated and free from damage.

  2. 2

    Check the state of the external device connected to the auxiliary input terminal to ensure it is functioning correctly and providing the expected signal.

Browse all codes in this manual (24)
Verified technical data. Last updated: April 2026

Related Faults

F100Parameter ChecksumF12HW OverCurrentF122I/O Board Fail
Source: Allen-Bradley PowerFlex 4 Adjustable Frequency
Open Manual (Page 15)Search more codes in this manual