Compac CNG Installation And Service Manual

Troubleshooting
Problems Filling
Compac Industries Ltd.
Page 47
www.compacngv.com
Problems Filling
Problem
Likely Cause(s)
Recommended Action
The post is under filling
Water in the gas mains has caused
freezing, blocking the pipes.
 Pour hot water on the frozen part of the
loading post.
 Install a drier into the gas main.

The loading post stops filling
the vehicle after approximately
1kg of gas has been dispensed
The over pressure switch is faulty
 Check the End of sale indicator to confirm
there is a problem with the over pressure
switch.
 Check the wiring to the switch and switch
operation. Replace switch if no fault is found
in the wiring.
The over pressure switch link has
come loose in J12
 Check the End of sale indicator to confirm
there is a problem with the over pressure
switch.
 Check the link in J12 is still in place and the
contacts are clean.
The loading post is slow filling
Moisture in the gas mains has caused
freezing in one or more of the valves.
(This often occurs when water has
not been cleared out of the gas pipes
after testing.)
 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
Gas flows but does not read up
on the display.
The C4000 needs to be reset
 Re-power loading post.
Solenoid valves are not closing at the
end of a fill when the loading post
stops metering because of dirt and/or
water contamination.
 Clean the solenoid and replace the valve
seals.
The meter is faulty and has stopped
recording flow.
 Replace the meter (see page 38).
The loading post stops at
9999.99, 99999.9, or
999999 units according to
where the decimal point is set.
The loading post will stop dispensing
if either the value or the quantity
displays ever reach these values.
 Hang up the nozzle to reset the display and
restart.
This is not a loading post fault.

Compac CNG Specifications

General

Brand	Compac
Model	CNG
Category	Dispenser
Language	English