Installation & Operation Manual

Table Of Contents
www.fuellock.ca November 2021 Version 3.0 Page 24
FLOW METER CIRCUIT BOARD REPLACEMENT
The flow meter circuit board is a small circuit board with electrical connection terminals connecting pulse flow
meters to the Fuel Lock® device. The circuit board is located next to the large terminal strip in the main area of
the Fuel Lock enclosure. The following instructions describe the process for replacing the flow meter circuit board
in the Fuel Lock device.
TOOLS REQUIRED
Phillips screwdriver
Small flat screwdriver
Labeling tape
PROCEDURE
Warning: All power must be disconnected before proceeding. Shut off power to the Fuel Lock device at
the circuit breaker.
1. Label the wires connecting the flow
meters to the flow meter circuit board
and from the customer peripherals side
to the circuit board for easier identifica-
tion when reconnecting to the new cir-
cuit board
2. Use the small flat screwdriver to loosen
the screw terminals on the bottom side
of the flow meter board
3. Loosen the screw terminals (a) that con-
nect the six wires at the top of the flow
meter board, then disconnect the wires
4. Loosen the screw terminals (b) that con-
nect the peripheral equipment wires at
the bottom of the flow meter board, then
disconnect the wires
5. Remove the four Phillips screws (c) that
secure the flow meter board in place
and remove the existing flow meter cir-
cuit board from the enclosure
6. Place the new flow meter circuit board into the enclosure and secure it with the four Phillips screws (c)
7. Reconnect the flow meter wires to the screw terminals (a) at the top of the flow meter board using the labels
placed in the first step. The wires must be connected to the terminals in the following order from left to right:
Red - Black - No connection - White - Brown - Teal - Blue
8. Reconnect the peripheral equipment wires to the screw terminals (b) at the bottom of the flow meter board
using the labels placed in the first step.
9. Restore power to the Fuel Lock device