High Slip Braking Overload

What does oL7 mean?

This fault is triggered when the load inertia is excessively large, an external force rotates the motor, or deceleration is impeded. It can also occur if the n3-04 [HSB Overload Time] parameter is set too low. The drive detects this when the output frequency remains constant beyond the duration specified by n3-04. Ignoring this can lead to excessive heat and damage to the drive or motor.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Increase the value of the n3-04 [HSB Overload Time] parameter, or connect a thermal overload relay to the motor and set n3-04 to its maximum value (1200s).

2. 4

   Perform a Fault Reset to clear the fault once all adjustments are made.