F12

Hardware Overcurrent

Allen-Bradley · PowerFlex 40 Adjustable Frequency AC Drive

What does F12 mean?

This fault indicates an excessive current condition detected by the drive's hardware. Potential causes include excessive motor load, incorrect DC boost settings, or excessively high DC brake voltage.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Check parameter A084 [Boost Select] and A085 [Start Boost] for appropriate settings.

  2. 4

    Check parameter A081 [DC Brake Level] to ensure the DC brake current is not set too high.

Source: Allen-Bradley PowerFlex 40 Adjustable Frequency AC Drive
Open Manual (Page 17)