Hafele DT 750, Installation And Maintenance Instructions Manual

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6.4  Maintenance 

instructions

In order to ensure that the equipment is usable in accordance with this document, 
the following routine maintenance checks must be carried out at intervals of no more 
than one month:

•  Inspection and actuation of the panic exit device in order to ensure that all 

components of the lock are in a satisfactory operating condition. 

•  The actuation force for releasing the panic exit device must be measured using 

a dynamometer and recorded.

•  It must be ensured that the locking counterpieces (striking plates) are not blocked 

or clogged up.

•  It must be checked whether the panic exit device has been greased in 

accordance with the manufacturer’s instructions.

•  It must be checked that no additional locking devices have been attached to the 

door.

•  It must be checked at regular intervals whether all components of the system still 

correspond with the list of permissible components that were originally delivered 
with the system.

•  It must be checked at regular intervals whether the operating element has been 

correctly tightened, and the actuation force for releasing the panic exit device 
must be measured using a dynamometer. It must be checked whether the 
actuation force has undergone a major change in comparison with the operating 
force recorded during the initial installation.

NOTE

Malfunction due to outdated Dialock firmware.

To ensure that the current Dialock firmware is running on the terminal, the 
device has to be flashed (programmed) using the mobile programming unit 
(MDU) during start-up. In case of questions concerning the firmware 
version or the procedure please contact Häfele.

BLE = Bluetooth Low Energy

Products that are equipped with BLE can also be operated via 
smartphone (Android/IOS) with a suitable app. In case of 
questions concerning smartphone applications please contact 
Häfele.

ins-srce-732.29.501_en.book  Seite 11  Montag, 3. Juni 2019  11:53 11