Compac CNG User Manual

Problems Starting a Fill
Troubleshooting
Compac Industries Ltd.
Page 76
www.compacngv.com
Problems Starting a Fill
Problem
Likely Cause(s)
Recommended Action
When the start button is
pressed the dispenser does not
display 888888 and reset for
the next fill.
The dispenser hose numbers have not
been set.
 Set the dispenser hose numbers.
Hose Number (see page 23)
The start button or nozzle switch is
faulty, stuck, or broken.
 Check that the Diagnostic LED (D18)
flashes quickly when you operate the
start button or nozzle switch, to make
sure that the C4000 is registering the
button or switch.
 Check that the nozzle switch is
operating correctly and is not broken,
and that the mechanism is free to
move in and out.
 Replace the button or switch if
necessary.
The connection between the forecourt
controller and dispenser
communications connection is faulty.
 Check the polling of the
communicator LEDs on the C4000 to
determine the quality of the
connection between the dispenser
and forecourt controller.
The C4000 Microprocessor Board is
faulty.
 If none of the above suggestions
resolve the problem, replace the
C4000 Microprocessor Board. (see
page 62)
Gas will not flow
There is no power to the solenoid.
 Establish the reason why there is no
power to the solenoid from the
Solenoid Problem section (see page
79), and then implement the
recommended action.
The solenoid coil is burnt out.
 Establish the reason for burn-out from
the Solenoid Problem section (see
page 79), and then implement the
recommended action.
The solenoid valve is stuck
 Clean the solenoid and replace the
valve seals.
The check valve is stuck
 Clean the check valve and replace
the valve seals
The regulator piston is stuck
 Clean the regulator and replace the
valve seals (see page 52).
Water in the gas has turned to ice,
blocking the gas flow. (Wet gas causes
freezing blocks in cold conditions,
regardless of filtering.)
 Pour boiling water onto the pipework
where the freezing has occurred until
the ice has thawed and the gas can
flow.
 Contact your gas supplier
The Over-Pressure switch has been
activated (if present).
 Check the pressure on the pressure
gauge.
If it exceeds 215 bar, the over-
pressure safety will have shut down
power to the solenoid but not the
electronics and metering.
 Clean the regulator and replace the
valve seals (see page 52).
 De-gas the dispenser to reduce the
pressure.

Compac CNG Specifications

General

Brand	Compac
Model	CNG
Category	Dispenser
Language	English