Cause : SBT brake opening time exceeded comes when the maximum time (11 s) to open the brake during the brake test was exceeded.

Possible causes:

- during the brake test the drive went into a fault condition, and therefore the brake was closed by the drive.
- for an external brake, the feedback signal "Brake closed" was signaled too long (p10230.5, p10235).

- Carry out a safe acknowledgment.
- restart the brake test (p10230.1, p10235.1).