Armature Circuit Open (Early Detection)

Was bedeutet F98 ?

This fault indicates that the motor's armature circuit is detected as open when the "Loop Confirm" signal activates, typically during the initial pre-loading sequence. This condition prevents the drive from establishing proper control of the motor and indicates a critical disconnection in the power path.

• A physical break or disconnection in the motor armature circuit wiring.
• The main armature contactor is not closed or has failed to make proper contact.
• Faulty "Loop Confirm" sensor or feedback circuit providing an incorrect status of the armature circuit.

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1. 1

   Power down the drive, then inspect all connections in the motor armature circuit (e.g., motor terminals, contactor terminals) for looseness or damage.

2. 2

   Measure the resistance across the motor armature terminals to verify winding integrity and continuity.

3. 3

   Verify the main armature contactor is picking and its main power contacts are closing when commanded.

4. 4

   Check the wiring and functionality of the "Loop Confirm" feedback signal to ensure it accurately reflects the armature circuit status.