MF Lock Not Fully Unlocking – Torque Limitation

In some cases, the MF lock may not fully unlock, even though it attempts to operate normally.

This is typically caused by the torque limit built into the lock, which is designed to stop the motor when resistance reaches a certain level.

Why This Happens

The MF lock uses a fixed torque threshold to determine when the locking or unlocking movement is complete.

• When the lock reaches this torque level, it automatically stops
• This is intended to prevent damage to the mechanism

However, on some doors:

• The required force to operate the mechanism is high
• The lock reaches the torque limit before the mechanism has fully unlocked

As a result, the lock stops early, and the door remains locked.

Common Scenario

This issue is more likely when:

• The door mechanism requires higher than normal force
• The required torque is very close to the lock’s limit

In these cases, the lock may:

• Work intermittently
• Stop at different points
• Fail to fully retract the bolt consistently

Important Limitation

There are no adjustable settings to increase or modify the torque threshold on the MF lock.

This means:

• The behaviour cannot be corrected through the app or configuration
• The lock cannot be tuned to apply more force

Outcome

If the door mechanism consistently requires more torque than the lock allows:

• The MF lock will not operate reliably
• It may fail to unlock fully on a regular basis

In these cases, the MF lock is not suitable for that door type.