Installation & Operation Manual

Table Of Contents
Page 31 November 2021 Version 3.0 www.fuellock.ca
TROUBLESHOOTING
Warning: Ensure power is off before removing or working near the contactors
Troubleshooting
Issue Solution
Erroneous fuel flow readings
Keep the high voltage 120/240 V power wires away from the low voltage
pulsar signal wires.
No power to fuel pumps after
unlocking with PIN
Flip the bypass switch into the “BYPASS” state and check if the contactor
energizes.
If the contactor does not engage, check the fuses on the circuit board
Check that 24 VAC is present at the contactor coil terminals
Check that 120/240V power is present at the supply and load termi-
nals of the contactor
Inconsistent Contactor Connec-
tion
Check that the relays at the bottom of the circuit board (next to the bypass
switches) are not
loose or dislodged
Ensure the brown and red contactor wires are securely connected to
the terminals at the bottom of the circuit board and to the coil termi-
nals on the backs of the contactors, possibly having to remove the
contactors from the backplate to gain access to the coil terminals