Starting Time Detected Fault (Too Long Start Time)

What does StF mean?

The motor's acceleration period exceeded the maximum allowed starting time ('tLS' parameter). This often indicates that the motor is struggling to accelerate, possibly due to excessive load, an undersized soft starter, or incorrect parameter settings.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify the sizing of the soft starter and motor in relation to the mechanical load requirements of the application.

2. 4

   Check the 'ILt' (Initial Current Limit) value; if it is set too low, the motor may not receive enough torque to accelerate to full speed.