Door Not Working on Battery Backup Power

To troubleshoot a door not functioning on built-in battery backup power for your PULSE 500 Series door operator, follow these steps:

For newer units, check the circuit breaker:

  • If the door is not operating, the circuit breaker may have tripped. Locate the breaker and press the reset button on top to restore power.

For older units, inspect the in-line fuse:

  • If the fuse is blown then replace it with a fuse that has the following specifications:
    • 5mm x 20mm, slow-blow/time-delay fuse;
    • For a PULSE 500 operator model, use a 5A fuse;
    • For a PULSE 750 operator model, use a 7A fuse;
    • For a PULSE 1000 operator model, use a 10A fuse.
    Note: You can also refer to the installation manual for the fuse specs.
  • 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.

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