7.4 Brake release tool does not work
Description
The holding brake of a motor is not released using the brake release tool.
Consequences
The robot axis can not be manually moved.
Possible causes
The symptom can be caused by:
• The RobotWare version is 7.10 or higher. Then the brakes are released using
the FlexPendant, see Manually releasing the brakes on page 69.
• Damaged magnet on the brake release tool.
• Faulty power supply to the brake.
• Incorrect usage of the brake release tool:
- There has been an attempt to use the brake release mechanism while
the robot is in mode MOTORS ON.
- There has been an attempt to use the brake release mechanism in
automatic operating mode.
- There has been an attempt to use the brake release mechanism during
the startup phase of the controller, that is, before the controller is fully
operational.
- There has been an attempt to use the brake release mechanism while
the manipulator is moving.
- There has been a very brief application of the magnet to the brake
release points, for example, by accident.
• Faulty joint electronic hardware.
Recommended actions
The following actions are recommended:
InformationAction
Brake release tool: 3HAC079146-001
Note
The spare parts related to the brake re-
lease function using the external tool are
discontinued from Q2 2023.
Look for damage to the magnet.
Replace the tool if damaged.
1
See Manually releasing the brakes with
the external tool on page 71.
Verify that the brake release tool is used
correctly.
2
See the circuit diagram.Check the brake power supply to the motor
during the Motors OFF state.
3
Check for any recorded fault status.
Continues on next page
Product manual - CRB 15000 1063
3HAC077389-001 Revision: L
© Copyright 2021 - 2023 ABB. All rights reserved.
7 Troubleshooting
7.4 Brake release tool does not work
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