Battery Replacement - Chamberlain LA400 Installation And Operation Manual

WARNING
To avoid SERIOUS personal INJURY or DEATH from
electrocution, DISCONNECT electrical power to operator
BEFORE proceeding.

Battery Replacement

1. Disconnect power to operator.
2. Open the control box cover.
3. Remove all quick connect terminals in use to the control board. Remember location of all wire connections for
reinstallation.
4. Remove control board and mounting plate.
5. Disconnect terminals leads to both batteries.
6. Replace both batteries and connect red wires to the positive (+) terminals (red). Connect black wires to the
negative (-) terminals (black).
7. Install control board and mounting plate.
8. Reconnect all quick connect terminals to the control board.
9. Close cover of control box.
10. Reconnect power to operator.
CAUTION
To reduce the risk of FIRE or INJURY to persons, use ONLY
LiftMaster part #K74-30762 for replacement batteries.
36
Batteries
Control Board and
Mounting Plate