Door Not Working on Battery Backup Power

For older units, inspect the inline fuse for battery backup:

• If the fuse is blown then replace it with a fuse that has the following specifications:
  • 5mm x 20mm, time-delay/slow-blow 5A fuse.
• Ensure you use the specified fuse to avoid further issues.

Check batteries:

• If your door still isn't working on battery backup power, the batteries may be drained or dead.
• Check the batteries' voltage first.
• If it's low (less than 20V), let them charge for 24 hours with AC power ON until the batteries reach approximately 26V.
• Replace the batteries if they are still not charged.
• If the batteries are fully charged and the door is balanced, but the issue persists, then please contact technical support for further assistance.

Check batteries' cables:

• Ensure that the battery backup cables are connected correctly as follows:
  • Check if the batteries are connected in series to the control board;
  • Check if cables are run from the Drive +/- terminal on the control board to the B+ and B- terminal in the junction box;
  • Check if the cables are run from B+ and B- terminals in the junction box to the Drive +/- in the drive board.

Check door balance:

• A door not functioning on battery power may also result from a door being improperly balanced.
• Resolve this by running BALANCE CHECK from the ADVANCED MENU, when the operator is on AC power.

Disconnect main power:

• Check if the main power is still active.
• To troubleshoot, disconnect the unit from the main power supply by unplugging/disconnecting it.
  This ensures the system attempts to switch to its built-in battery backup power.

Check relay:

• Check whether the relay is clicking or not while pressing the open or close button. You should hear the relay clicking.
• If the relay is not clicking, it might be stuck, so try to give it a gentle tap with the back of a screwdriver.
• • If the relay is still not clicking while holding the open or close button, then please contact technical support for further assistance.
• If the relay is clicking and the blue LED above the relay is lighting up:
  • Check that the batteries have more than 20V and check for voltage coming out of Drive +/-;
  • If there is no voltage, there could be a short in the cables, so try disconnecting the cables and measuring the Drive +/- again.
  • If there is still no voltage, then it is possible that the relay is damaged.
    In that case, please contact technical support for further assistance.