Thermal overload of brake coil or brake coil defect

What does 89 mean?

The brake coil has experienced thermal overload, indicates a defect, is incorrectly connected, or its internal resistance is not correct. This condition can result from excessively short ramp times, prolonged brake engagement, or an improper drive-inverter combination. A faulty brake coil compromises the holding function, which can lead to uncontrolled movement or mechanical system damage.

• Ramp time setting is too short, leading to excessive brake energy dissipation.
• Defect in the brake coil winding.
• Incorrect connection of the brake coil.
• Incorrect internal resistance of the brake coil.
• Mismatched drive (brake coil) and MOVIMOT frequency inverter combination, especially if the fault occurs shortly after the first enable.
• Incorrect setting of DIP switch S3/2 (AS-i version) or S1/6 (Standard version) for specific MOVIMOT and motor power increment combinations.

Click steps to track your progress.

1. 1

   Increase the set ramp time in the inverter parameters.

2. 2

   Perform a brake inspection (refer to the 'Inspection and Maintenance of the brake' section for detailed procedures and expected values).

3. 3

   Check the brake coil connection for continuity and correct wiring using a multimeter.

4. 4

   Measure the internal resistance of the brake coil and compare it to the values specified in the 'Technical Data' section.

5. 5

   Verify the combination of the drive (brake coil) and MOVIMOT frequency inverter using product documentation, especially if the fault is signaled shortly after the first enable.

6. 6

   For MOVIMOT with a lower power increment motor, check the setting of DIP switch S3/2 (AS-i version) or S1/6 (Standard version).