Hoyles Dorgard Fire Door Retainer - Manual (Page 14)

13
Trouble Shooting continued
3. Why does my door creep closed with Plunger fully depressed?
• Check that the Ferrule is not worn or damaged. Replace as necessary.
• Check that Dorgard is positioned low enough that the Ferrule makes good contact with
the floor when the Plunger is depressed. A vertical Plunger movement of 10-15mm is
ideal. Re-position as necessary or fit the Floorplate supplied.
• Check that the overhead door closer does not shut the door with excessive force. If so, fit
the Floorplate supplied or adjust pressure on overhead closer (refer to manufacturers
instructions).
• Check that the Ferrule has enough grip on the floor surface i.e. floor surface is not too
slippery. If so, fit the Floorplate supplied.
4. Why does Dorgard not retain the door in an open position.
• Check that the Plunger is depressed.
• Check that the Battery Compartment is closed, the Batteries are correctly installed
and operating.
• Check that Dorgard is not fitted too low or high on the door. A vertical Plunger
movement of 10-15mm is ideal for the Plunger to lock down properly.
• Check that Dorgard is fitted to the side of the door that closes into the door frame.
• Check Dorgard has not Failed to Safe.
• Remove Batteries and wait 10 seconds before reinserting them in the Dorgard to reset
the unit.
If all the above points are satisfied and further assistance is required please contact the
Technical Advice Line.