Problems When Dispenser Is Idle - Compac CNG Service Manual

Troubleshooting

Problems When Dispenser is Idle

Problem
After powering the dispenser,
PA:uSE
is displayed and the
countdown from 60 doesn't start.
The dispenser pressure gauge
creeps past 200 bar when the
dispenser is not in use.
The C4000 electronics are not
working. The indicator LEDs are
off and nothing happens when
you lift the nozzle (i.e., no beeps
888888
or is displayed).
The Output LED T10 is ON.
The watchdog LED D5 is
illuminated.
A display LCD segment is
always on or always off.
Compac Industries Ltd.
Likely Cause(s)
For push to start dispensers the start
button is held down.
The nozzle is not stowed or the nozzle
switch is active.
The regulator centre seal is damaged.
The solenoid piston seal is damaged.
Unacceptable voltage spikes are causing
the fuses on the C4000 to blow.
There is low input voltage.
An error state exists.
A processing fault has occurred.
Faulty display unit.
Page 75
Problems When Dispenser is Idle
Recommended Action
 Release the start button.
 Correctly stow the nozzle.
 Replace the Regulator Valve Seals
(see page 52)
 Replace the Solenoid Valve Seal
(see page 48)
Fit a voltage-stabilising UPS to the

dispenser.
 Replace the power supply fuses
(see page 60)
Turn the dispenser off and then on

again.
 Check the power supply connections
and input voltage to the dispenser
with a multimeter.
stabilising UPS will be required.
 Remedy the cause of the error (i.e.,
Display, Memory, or KG meter) by
checking the Fault Codes section
(see page 120).
 Clear the error by quickly pressing
the start button or nozzle switch five
times to view the totes.
 Turn the power to the dispenser off
and then on again to reset the
watchdog.
 If the light still illuminates, there is a
fault on the C4000 microprocessor
board, such as a loose memory chip
or a broken track.
 Replace C4000
software chips
Replace C4000 processor board

 Replace Display PCB
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A voltage-
memory and