Softstart fault power supply unit

What does F2816 mean?

A fault has occurred in the softstart circuit of the power supply unit. The softstart limits inrush current during power-up to protect components. This fault indicates that the softstart mechanism either failed to activate, failed to limit current effectively, or timed out. This can lead to high current surges and potential damage upon power-on.

• Defective softstart resistors or relays
• Control circuit failure for the softstart function
• Excessive inrush current due to external factors (e.g., large capacitance)
• Incorrect timing parameters for the softstart circuit
• Temporary short circuit during power-up

Click steps to track your progress.

1. 1

   Measure the incoming AC supply voltage at the drive's input terminals (L1, L2, L3) and verify it matches the nominal voltage specified for the IndraDrive MPx02.

2. 2

   Inspect all input power wiring, including main contactor connections and the drive's input terminals, for loose connections, signs of corrosion, or any physical damage.

3. 3

   Check the IndraDrive MPx02 diagnostic display or HMI for any additional concurrent fault codes or specific status messages that appear during the power-up sequence.

4. 4

   Verify drive parameters related to the power supply configuration, such as nominal input voltage (e.g., P-0-0200 in Rexroth), to ensure they correctly match the actual measured supply.