Jandy LJ Power Control Board | R0366800

1. Remove The Existing Power Distribution Board.

1.1.Turn off the power supply to the heater.

1.2.Remove the front panel (door) of the heater.

1.3. Remove the cover of the high voltage assembly connection box.

1.4. Use the labels provided to tag and mark the blower wire harness, leading to the blower relay (models HJ and LJ Low-NOx), the pump wire harness, leading to the pump relay, and the power supply wires so that they can be easily identified when reconnecting them to the new power distribution board (see Figure).

1.5. Unplug all of the wires and harnesses from the power distribution board.

1.6. Remove the power conversion plug from the board and set it aside. You will need it after installing the new power distribution board.

1.7. Remove the four (4) screws, one in each corner, that secure the power distribution board to the standoffs mounted on the back of the power connection box

2. Install the New Power Distribution Board

2.1. Align the holes in the new power distribution board with the standoffs and replace the screws to secure the board.

2.2.Reconnect all of the wires and harnesses to the power distribution board. All plugs are keyed and will fit only one way into the appropriate receptacle. If your heater has both a blower relay and a pump relay, be sure that each wire harness is plugged into the correct recep-tacle. Double-check your wiring with the wiring diagram on the inside of the heater. Receptacles on the power distribution board are labeled accordingly.

2.3. Insert the power conversion plug into the receptacle on the power distribution board.

2.4. Replace the cover of the power connection box.

2.5. Replace the panel ( door) of the heater.

2.6. Restore power to the heater.

2.7. Test the heater by running it through several ignition cycles.