Compac CNG Installation And Service Manual

Problems Starting a Fill
Troubleshooting
Compac Industries Ltd.
Page 46
www.compacngv.com
Problems Starting a Fill
Problem
Likely Cause(s)
Recommended Action
When the start button is
pressed the loading post does
not display 888888 and reset
for the next fill.
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 C4000 Microprocessor Board is
faulty.
 If none of the above suggestions
resolve the problem, replace the
C4000 Microprocessor Board. (see
page 36)
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
48), 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 48), 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

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.
 De-gas the loading post to reduce the
pressure.

Compac CNG Specifications

General

Brand	Compac
Model	CNG
Category	Dispenser
Language	English