GU BKS B 1956 User Manual (English)

Questions and Answers:

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Courtney JenkinsAug 4, 2025
How to troubleshoot a GU lock that does not unlock?
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  housephilipAug 4, 2025
  If your GU lock isn't unlocking, here's what to check: * **Power Supply:** Ensure there's at least 21.5V DC at the lock. Verify the power supply unit, fuse, and cable sizes are adequate, replacing if needed. * **Control Signal:** Inspect the control input (Pin 9/pink) for a +24V signal. * **Mechanical Obstructions:** Check the door and frame for twisting or warping, latch jamming, or hardware screws pressing on the lock case. * **Programming Mode:** Exit or abort programming mode. * **Profile Cylinder:** Remove the key. * **Cam Position:** Check the cam position when removing the key. Also, remember that if the cylinder is operated while the motor is running, the lock will enter overload protection and ignore control signals for 20 seconds.
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Morgan BrennanAug 8, 2025
What to do if the GU lock latchbolt remains stuck in the lock?
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  nicholas49Aug 8, 2025
  If the latchbolt on your GU lock remains in the lock, consider these potential causes and solutions: * **Power Supply:** Ensure there is at least 21.5 V DC at the lock. Check the power supply unit, fuse, and cable cross-sections are sufficiently sized and replace if necessary. * **Control Signal:** Check the control signal and deactivate daytime release if a voltage of 24 V is permanently applied on the control line. * **Mechanical Issues:** Refer to the troubleshooting steps for when the "Lock does not unlock" for mechanical issues. * **Profile Cylinder:** Remove the key if it's actuated. * **Lever Handle:** Check the hardware if the lever handle is permanently actuated.
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Amy HayesAug 13, 2025
Why is my GU lock stuck in programming mode and not unlocking?
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  davidhardyAug 13, 2025
  If your GU lock is in programming mode, it might not unlock. To resolve this, exit or abort the programming mode.
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Jenna DavisAug 18, 2025
What to do if profile cylinder actuated prevents GU lock from unlocking?
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  hermanthomasAug 18, 2025
  If the profile cylinder is actuated, and it's preventing your GU lock from unlocking, remove the key.