Causes

Possible Solutions

The drive did not receive a Run command after applying power.

  • Examine the sequence and wiring that enters the Run command.

  • Set up a relay to make sure that the Run command stays enabled during a loss of power.

For applications that use 3-wire sequence, the momentary power loss continued for a long time, and the relay that keeps the Run command has been switched off.

Examine the wiring and circuitry for the relay that keeps the Run command enabled during the momentary power loss ride-thru time.