Under current (uC)

Low current detection.

Improper setting of low-current protection - Reset Pr.06-71, Pr.06-72 and Pr.06-73 to proper settings.

The load is too low -

Check the load status.
Check if the motor capacity matches the load.

Fault treatment parameter

Pr.06-73
0: No function
1: Fault and coast to stop
2: Fault and ramp to stop by second deceleration time
3: Warn and operation continue

When Pr.06-73 = 3, uC is a “Warning”. The warning is automatically cleared when the output current > (Pr.06-71+0.1 A).

When Pr.06-73 = 1 or 2, uC is a “Fault”. You must reset manually.

This fault also comes when you run drive without motor or rating of motor is small as compare to drive.