Gasboy Fuel Truck Controller - Manual (Page 74)

Fuel Truck Controller Manual 68
No
communication
OrCU LEDs are
not lit
Power failure Does the unit shut down
immediately after being
turned on?
1. Check for shorts in the
power line cable
2. Check grounding
Circuit breaker is
off
Is breaker off or tripped? Turn breaker on, if off
Is 12VDC/24VDC being
switched through breaker?
Replace breaker if
12VDC/24VDC is not
being switched
Is 12VDC/24VDC
measured at the power
input terminal block?
Correct wiring problems if
12VDC/24VDC is not
measured
Does the breaker turn off
immediately after being
turned on?
Check for loads or shorts in
the power line
Internal fuse blown Check the two pico fuses
(red wires) at the bottom
of the power supply using
an ohmmeter
Replace the fuse if it is
blown
Power supply
failure
Verify that green LED on
power supply is lit
1. Replace mini fuse
2. Replace power supply
Table 4-1. Fuel Truck Controller Troubleshooting (Cont'd)
Fault Probable Cause Checks Corrective Action
System is down (Continued)
Mechanic pump does not refuel