CNG DISPENSER
SERVICE
MANUAL
CNG Dispenser Service Manual
Version 1.1.4
Date: 8th December 2017
Conditions of Use
Conditions of Use
▪ Read this manual completely before working on,
or making adjustments to, the Compac
equipment
▪ Compac Industries Limited accepts no liability for
personal injury or property damage resulting
from working on or adjusting the equipment
incorrectly or without authorization.
▪ Along with any warnings, instructions, and
procedures in this manual, you should also
observe any other common sense procedures
that are generally applicable to equipment of this
type.
▪ Failure to comply with any warnings,
instructions, procedures, or any other common
sense procedures may result in injury, equipment
damage, property damage, or poor performance
of the Compac equipment
▪ The major hazard involved with operating the
Compac C4000 processor is electrical shock.
This hazard can be avoided if you adhere to the
procedures in this manual and exercise all due
care.
▪ Compac Industries Limited accepts no liability for
direct, indirect, incidental, special, or
consequential damages resulting from failure to
follow any warnings, instructions, and
procedures in this manual, or any other common
sense procedures generally applicable to
equipment of this type. The foregoing limitation
extends to damages to person or property
caused by the Compac C4000 processor, or
damages resulting from the inability to use the
Compac C4000 processor, including loss of
profits, loss of products, loss of power supply,
the cost of arranging an alternative power
supply, and loss of time, whether incurred by the
user or their employees, the installer, the
commissioner, a service technician, or any third
party.
▪ Compac Industries Limited reserves the right to
change the specifications of its products or the
information in this manual without necessarily
notifying its users.
▪ Variations in installation and operating conditions
may affect the Compac C4000 processor's
performance. Compac Industries Limited has no
control over each installation's unique operating
environment. Hence, Compac Industries Limited
makes no representations or warranties concerning
the performance of the Compac C4000 processor
under the actual operating conditions prevailing at
the installation. A technical expert of your choosing
should validate all operating parameters for each
application.
▪ Compac Industries Limited has made every effort to
explain all servicing procedures, warnings, and
safety precautions as clearly and completely as
possible. However, due to the range of operating
environments, it is not possible to anticipate every
issue that may arise. This manual is intended to
provide general guidance. For specific guidance and
technical support, contact your authorised Compac
supplier, using the contact details in the Product
Identification section.
▪ Only parts supplied by or approved by Compac may
be used and no unauthorised modifications to the
hardware of software may be made. The use of nonapproved parts or modifications will void all
warranties and approvals. The use of non-approved
parts or modifications may also constitute a safety
hazard.
▪ Information in this manual shall not be deemed a
warranty, representation, or guarantee. For warranty
provisions applicable to the Compac C4000
processor, please refer to the warranty provided by
the supplier.
▪ Unless otherwise noted, references to brand names,
product names, or trademarks constitute the
intellectual property of the owner thereof. Subject to
your right to use the Compac C4000 processor,
Compac does not convey any right, title, or interest
in its intellectual property, including and without
limitation, its patents, copyrights, and know-how.
▪ Every effort has been made to ensure the accuracy
of this document. However, it may contain technical
inaccuracies or typographical errors. Compac
Industries Limited assumes no responsibility for and
disclaims all liability of such inaccuracies, errors, or
omissions in this publication.
Product Identification
Product Identification
Validity
Compac Industries Limited reserves the right to revise or change product specifications at any
time. This publication describes the state of the product at the time of publication and may not
reflect the product at all times in the past or in the future.
Models Covered
Standard
High Flow
Ultra-High Flow
Laser
L-CNG15
L-CNGD15
L-CNG50
L-CNGD50
L-CNG50-15
L-CNG80
L-CNGD80
L-CNG80-15
Legend
LGDCNG15
LGDCNGD15
LE3KG25D
LGDCNG50
LGDCNGD50
LGDCNG50-15
LGDCNG80
LGDCNGD80
LGDCNG80-15
Manufactured By:
The Compac CNG dispenser is designed and manufactured by Compac Industries Limited
52 Walls Road, Penrose, Auckland 1061, New Zealand
P.O. Box 12-417, Penrose, Auckland 1641, New Zealand
Phone: + 64 9 579 2094
Fax: + 64 9 579 0635
www.compac.co.nz
Copyright ©2015 Compac Industries Limited, All Rights Reserved
Document Control
Document Control
Document Information
Document Details
CNG Dispenser Service Manual
File Name and Location
G:\Masters\Manuals\Authorised Manuals\CNG
Manuals
Current Revision Author(s)
J Jang
Authorised By
W Zheng
Release Date:
27/01/2016
Revision History
Version
Date
Author(s)
Revision Notes
1.0.0
12/01/2010
R Lacey
Added document control
information
1.0.2
08/09/2010
R Lacey
Added troubleshooting
hyperlinks
1.0.3
10/02/2011
R Lacey
Added RS485 MOD-BUS &
Micro Motion wiring
1.0.4
13/04/2011
R Lacey
Added RS485 wiring
diagram
1.0.5
11/05/11
A.Kingstone
Corrected part numbers
1.0.6
10/02/2014
R Lacey
Added 350 Bar solenoid
information
1.0.7
14/04/2014
R Lacey
Added new Temperature
Pressure Board
connections
1.0.8
05/05/2014
R Lacey
Added Er FLO error
message
1.0.9
12/06/2015
R Lacey
Added information about air
actuated valve supplement
1.1.0
21/07/2015
R Lacey
Included Isolation valve and
gas operated valve
servicing instructions
1.1.1
20/11/2015
H Kleyer
Updated C4000 Power
Supply diagram
Document Control
1.1.2
10/03/2016
H Kleyer
Updated manual for Mk2
C4000 Power Supply
1.1.3
10/03/2016
H Kleyer
Updated PID
1.1.4
22/01/2018
J Jang
Updated manual
1.
Contents
Contents
Conditions of Use ................................................................................................. 1
Product Identification .......................................................................................... 2
Document Control ................................................................................................ 3
Contents ............................................................................................................... 1
Safety ................................................................................................................... 4
Mechanical Safety ..................................................................................... 4
Electrical Safety ........................................................................................ 5
Introduction .......................................................................................................... 6
Refuelling Modes ................................................................................................. 7
Dispenser Operation ............................................................................................ 8
Turning the Dispenser on ......................................................................... 8
Refuelling a Vehicle ............................................................................................. 9
Fast Fill Refuelling Process .................................................................... 10
Temperature Compensated Refuelling Process..................................... 11
Reading the Dispenser Totals ................................................................. 12
Electronics ......................................................................................................... 13
C4000 Processor ..................................................................................... 13
Menu Options ..................................................................................................... 15
Unit Price ............................................................................................................ 16
To set the unit price: ............................................................................... 16
Sequencing Rate ................................................................................................ 17
Hose Number ...................................................................................................... 18
To Set the dispenser hose numbers: ...................................................... 18
Software Version HIA29.24.9CNG onwards: ........................................... 18
Dispenser Software ........................................................................................... 19
To Identify the software Program Version Number: .............................. 19
End of Sale Indicators ........................................................................................ 20
To View the End of Sale indicators: ........................................................ 20
Dispenser Passcode .......................................................................................... 22
To Set the Dispenser Passcode: ............................................................. 22
To Disable the Dispenser Passcode: ...................................................... 22
2.
Contents
Troubleshooting ................................................................................................. 23
Fault Codes ........................................................................................................ 25
Indicator LED’s ................................................................................................... 27
Servicing ............................................................................................................ 31
Degassing the Dispenser ........................................................................ 31
Schedules Servicing ................................................................................ 32
Checking Dispenser Operation ............................................................... 33
Checking the Sealing of the Solenoid .................................................... 33
Checking the Setting and Sealing of the Regulator ............................... 33
Checking the Over-Pressure Switch Operation (Fast Fill & Temperature
Compensated Units Only)........................................................................ 34
Checking the Dispenser for Leaks ......................................................... 35
Checking the Refuelling Hoe for Leaks .................................................. 36
Checking the Isolation Ball Valve Sealing and Operation ..................... 36
Checking the Three-Way Refuelling Valve Sealing and Operation ....... 37
Draining the Coalescing Filter ................................................................ 37
Filter Element Replacement ......................................................... 38
Solenoid Valve Seal Replacement .......................................................... 39
Solenoid Coil Replacement ..................................................................... 42
Complete Solenoid Valve Replacement .................................................. 43
Regulator Valve Seal Replacement ........................................................ 44
Isolation Valve Seal Replacement .......................................................... 46
Gas Operated Valve (option) Seal Replacement .................................... 48
Bleed Valve Replacement ....................................................................... 52
Pressure Relief Valve Replacement ....................................................... 52
KG80 Meter Replacement ....................................................................... 52
Compac Breakaway Seal Replacement ................................................. 53
Three-Way Refuelling Valve Seal Replacement ..................................... 55
Compac Refuelling Valve Exploded View ............................................... 57
3.
Contents
Refuelling Hose Replacement ................................................................. 58
Power Supply Fuse Replacement ........................................................... 58
Power Supply Replacement .................................................................... 60
Processor Board Replacement ............................................................... 61
Temperatuer Pressure Board Replacement (Fast Fill & Temperature compensation
Units Only) ............................................................................................... 62
Dispenser Software Upgrade/Replacement ........................................... 63
Meter Replacement ................................................................................. 65
Unserviceable Parts List ......................................................................... 65
Dispenser Calibration ........................................................................................ 66
Meter Calibration .................................................................................... 66
Pressure Transducer Calibration (Fast Fill & Temperature Compensated Units Only)
................................................................................................................. 68
Ambient Temperature Sensor Calibration .............................................. 69
Appendix ............................................................................................................ 70
Specifications .................................................................................................... 71
Model Specifications .............................................................................. 71
Technical Specifications ......................................................................... 72
Component Specifications ...................................................................... 74
Mechanical Drawings ........................................................................................ 77
Dispenser Component Locator ............................................................... 77
4.
Safety
Safety
DANGER PRECAUTIONS
You must adhere to the following safety precautions at all times when working on the
Compac equipment. Failure to observe these safety precautions could result in
damage to the dispenser, injury, or death.
Make sure that you read and understand all safety precautions before operating the
Compac equipment
Failure to take adequate safety precautions could result in explosion, injury and loss of
life.
System Design
Ensure the system design does not allow the dispenser inlet pressure to
exceed its rating. The dispenser does not include any safeties to protect
against excessive inlet pressure. If necessary, suitable protective devices
should be fitted prior to the dispenser inlet.
Mechanical Safety
Observe the following electrical precautions:
▪ Never tighten a fitting under pressure, even if a fitting or joint is leaking.
Always depressurise the line first.
▪ Never disassemble a fitting under pressure. Always depressurise the line first.
▪ Be very careful when disassembling frozen pipework, as gas pressure may be
trapped and suddenly released. Always depressurise the line before using.
▪ Never reuse any O-ring seals that have been in a high pressure gas
atmosphere and then exposed to air. These o-rings swell and cannot be
reused. Always make sure you have a new seal kit available to replace the
seals before disassembly.
▪ Make sure that all internal surfaces are cleaned and that sliding surfaces are
lightly greased with O-ring lubricant before reassembly. Dust and dirt entering
components reduce the life span of the components and can affect operation.
▪ Ensure the service area is thoroughly cleaned before initiating service on CNG
components. Dust and dirt entering the components reduce the life span of the
component and affect future operations.
5.
Safety
Electrical Safety
Observe the following electrical precautions:
▪ Always turn off the power to the CNG Dispenser before removing the box lid.
Never touch wiring or components inside the CNG Dispenser with the power
on.
▪ Never power up the CNG dispenser with the flameproof box lid removed.
▪ Always turn off the power to the dispenser before removing or replacing
software or memory IC’s
▪ Always take basic anti-static precautions when working on the electronics,
i.e., wearing a wristband with an earth strap. The Compac CNC dispenser is
designed to provide safe and reliable dispensing of CNG fuels. They are
available in either single or dual hose configurations and with different flow
rates.
▪ Compac CNG dispensers are controlled by a C4000 board which has many
programmable features to suit your individual operation.
6.
Introduction
Introduction
The Compac CNC dispenser is designed to provide safe and reliable dispensing of CNG
fuels. They are available in either single or dual hose configurations and with different
flow rates.
Compac CNG dispensers are controlled by a C4000 board which has many
programmable features to suit your individual operation.
This manual contains the information required to operate and maintain your dispenser.
Due to ongoing improvements and customised designs, there may be software
features that are not available on your particular unit.
For clarity, this manual will refer to the "Dollars" display. If you do not use dollars
please substitute this for your local currency.
7.
Refuelling Modes
Refuelling Modes
Fixed Pressure Refuelling
The fuel is dispensed through a fixed pressure regulator. When fuel flow reaches a
minimum rate. The fuel flow is shut off. Refer to Fixed Pressure Refuelling.
Fast Fill Refuelling
To enable fast refuelling, the pressure in the tank is measured then a small amount of
precisely measured fuel is dispensed into the tank and the pressure rise is measured.
From these figures, the volume of the tank is calculated, and the tank filled rapidly to
this level. When the tank is full the flow is shut off by a solenoid valve. Refer to Fast Fill
Refuelling Process.
Temperature Compensated Refuelling
In cold environments, a tank filled to maximum pressure may exceed its maximum
pressure if the temperature rises. To prevent overfilling, a thermometer measures
ambient temperature and reduces the maximum fill pressure to eliminate this
possibility. Refer to Temperature Compensated Refuelling Process.
8.
Dispenser Operation
Dispenser Operation
Turning the Dispenser on
When the power is applied to the dispenser, the display will show PA:Use and
count down from 60seconds. This start-up procedure ensures the dispenser is
functioning properly before gas is dispensed.
Dispenser will be ready to use when the display indicates 0.00
NOTE: Before starting a fill, the software checks the status of the Stop switch. If the
switch is latched on, the display will flash STOP and will not allow the fill to proceed
until the switch is reset. The switch can be reset by rotating the Stop switch in a
clockwise direction.
9.
Refuelling a Vehicle
Refuelling a Vehicle
There can be up to three storage banks for CNG refuelling. During filling the dispenser
sequences through these banks from low to high as the pressure in the vehicle
cylinder increases and the flow rate drops.
Appropriate personal safety equipment should be worn whilst refuelling a vehicle.
To refuel a vehicle
▪ Press the start button or remove the nozzle from the holster to initiate a fill.
▪ The display will show 888888 and clear, at this point both the gas and
value totals will display 0.00
▪ Connect the refuelling nozzle to the vehicle.
▪ Open the nozzle refuelling valve to commence filling.
▪ The dispenser will emit a long beep signalling the end of the fill, at this point
the gas total display flashes Fin.
▪ Close the refuelling valve.
NOTE: Closing the valve shuts off the gas from the dispenser. It also vents the gas
between the refuelling valve and coupling to the dispenser vent point.
▪ Disconnect the nozzle from the vehicle.
▪ Return the refuelling nozzle to the nozzle holder.
10.
Refuelling a Vehicle
Fast Fill Refuelling Process
The fast fill refuelling process uses pressure sensors to calculate the quantity of gas
required to fill a vehicle to a configurable target fill pressure (FPA).
The technical operation of a fast fill dispenser is as follows:
▪ Press the start button or remove the nozzle from the holster to initiate a fill.
o The display will indicate 888888 then clear, at this point both the
gas and value totals will display 0.00.
▪ Connect the refuelling nozzle to the vehicle.
▪ The refuelling valve is opened and when flow is detected the solenoids shut
immediately. Pressure reading and amount dispensed is recorded.
▪ The solenoids are opened and filling continues as follows:
o If
was less than 50bar , the fill will continue for 20
seconds.
o If
was greater than 50bar but less than 100bar ,
the fill will continue for 14 seconds.
o If
was greater than 100bar but less than 150bar
, the fill will continue for 10 seconds.
o If
was greater than 150bar but less than 180bar
r, the fill will continue for 6 seconds.
▪ The solenoids shut and pressure reading
and amount dispensed
are recorded.
▪ The amount of gas
to completely fill the vehicle to FPA is calculated as
follows:
▪ The dispenser fills to
and stops. This is the end of the fill.
11.
Refuelling a Vehicle
Temperature Compensated Refuelling Process
The technical operation of a temperature compensated dispenser is as follows:
▪ Press the start button or remove the nozzle from the holster to initiate a fill.
The display will indicate 888888 and then clear, at this point both the
gas and value totals will display 0.00.
▪ Connect the refuelling nozzle to the vehicle.
▪ The refuelling valve is opened and when flow is detected the solenoids shut
immediately. Pressure reading and amount dispensed are
recorded.
▪ The compensated fill pressure Ptc is calculated. If the vehicle is within 20 bar
of this pressure, no filling takes place.
▪ The solenoids are opened, and filling continues as follows:
o If
was less than 50bar , the fill will continue for 20
seconds.
o If
was greater than 50bar but less than 100bar
, the fill will continue for 14 seconds.
o If
was greater than 100bar but less than 150bar
, the fill will continue for 10 seconds.
o If
was greater than 150bar but less than 180bar
r, the fill will continue for 6 seconds.
▪ The solenoids shut and pressure reading
and amount dispensed
are recorded.
▪ The amount of gas
to completely fill the vehicle to is calculated as
follows:
▪ The dispenser fills to
and stops. This is the end of the fill.
12.
Refuelling a Vehicle
Reading the Dispenser Totals
To read the dispenser totals:
▪ Quickly press the Start button or nozzle switch five times on the side of
the dispenser you wish to view the totals for. The total is 10 digits long. The
four most significant digits are displayed on the top line and the number wraps
to the second line showing the six least significant digits.
The dispensed amount will be shown on the display for 10 seconds.
This will be shown as:
d Followed by a 10-digit total (eg. d**********).
The dispensed quantity will then be shown next and will be displayed for 10
seconds.
This will be shown as:
L Followed by a 10-digit total (eg. L**********).
NOTE: From software version HIA29.25.3CNG onwards the decimal place has been
removed from the tote. There will be two digits on the top ($) display and six digits on
the lower (kg) display. For dual dispensers, the A or B side will be indicated in the unit
price display.
13.
Electronics
Electronics
C4000 Processor
The Parameter switch is located on the C4000 processor board and allows you to
adjust the unit price, horse number, sequencing rate and password.
The Parameter switch also enables you to view the Dispenser Software Version and
End of Sale Indicators.
The Compac C4000 is a microprocessor-based circuit board designed for use in liquid
and gaseous fuel metering. One C4000 head is used for a single or dual LPG
dispenser. The C4000 accepts inputs from the V50 meter. It converts the V50 meter
output to litres, which are corrected to litres at 15°C and displayed with the price and
total of the sale on the retail LCD display.
NOTE: Wait at least 30 seconds from powering up the C4000 before starting a fill.
Failure to do this will result in a "density” error.
The parameter and K-Factor switches are used to configure the dispenser’s C4000
processor. Changes made can affect how the dispenser operates and can result in it
becoming inoperable. Only make changes when you understand what you are
changing.
The parameter and K-Factor switches are located on the C4000 board, which is in the
dispenser cabinet and covered by a metal panel. The K-Factor switch is sealed to
prevent tampering.
14.
Electronics
PARAMETER
K-FACTOR
15.
Menu Options
Menu Options
Listed below is the order in which the Parameter switch menu options are presented.
There are different menu options depending on the current setting of the C
configuration code.
The X indicates that you can achieve the displayed menu option, regardless of what
the indicated part is set to. You may need to change the C configuration in order to
access the parameter code you require.
C Configuration
Set-Up Code
Code Description
CXXX61
P
Software Program version
Pr
Unit Price
SE9
CNG Sequencing rate
(FAS,nOr,SLO)
Pn
Hose Number
Code
Dispenser Passcode
CXXX62
P
Software Program version
PrA
Unit Price Side A
PrB
Unit Price Side B
PnA
Hose Number Side A
PnB
Hose Number Side B
Code
Dispenser Password
To change the value of a selected digit, hold down the K-Factor switch. This will cause
the digit to cycle through (0,9). Releasing the K-Factor switch will select the digit.
The K-Factor switch must be resealed after use to prevent unauthorised access.
NOTE: Before altering any K-Factor switch settings, ensure the nozzles are hung up,
and the dispenser is idle.
16.
Unit Price
Unit Price
The unit price (Pr, PrA and Prb) is used to calculate the total value of the
quantity dispensed. The unit price can be different on each side of a dual hose
dispenser.
PR or PrA is the unit price for side A of the dispenser.
Prb is the unit price for side B of the dispenser
The unit price can be set at the dispenser or set remotely with the Compac Dispenser
Monitor.
NOTE: If the unit price is not set Error 3 will be displayed and the dispenser
will not operate.
To set the unit price:
▪ Make sure that the dispenser is idle, with the nozzle in its holster.
▪ Press and release the Parameter switch until the required unit price is
displayed. (Pr, PrA or Prb)
▪ Enter in the unit price.
NOTE: Each press of the Parameter switch passes you over a digit in a setting,
making the digit blink. Holding the switch down for more than a second changes
whichever digit is currently displayed. If you want to pass over a setting without
changing any digits, keep pressing and releasing the switch.
▪ Let the menu time out so that the value and quantity amounts are displayed.
17.
Sequencing Rate
Sequencing Rate
NOTE: Only available on CNG dispensers. Appropriate software required.
The sequencing rate (SE9) enables you to set the percentage level of maximum flow
that sequencing occurs to the next pressure bank.
These are three settings to choose from;
▪ FAS: Switching to the next higher-pressure bank occurs at 40% of the
maximum flow rate for a particular bank.
▪ nOr: Switching to the next higher-pressure bank occurs at 30% of the
maximum flow rate for a particular bank.
▪ SLO: Switching to the next higher-pressure bank occurs at 20% of the
maximum flow rate for a particular bank.
NOTE: From software version HIA29.25.3CNG onwards the sequencing rates are as
follows:
▪ FAS: Switching to the next higher-pressure bank occurs at 60% of the
maximum flow rate for a particular bank or when the flow rate drops to
,
whichever occurs first.
▪ nOr: Switching to the next higher-pressure bank occurs at 30% of the
maximum flow rate for a particular bank or when the flow rate drops to
,
whichever occurs first.
▪ SLO: Switching to the next higher-pressure bank occurs at 20% of the
maximum flow rate for a particular bank or when the flow rate drops to
,
whichever occurs first.
NOTE: The dispenser leaves the factory with the FAS setting.
To set the sequencing rate:
▪ Make sure that the dispenser is idle, with the nozzle in its holster.
▪ Press and release the Parameter switch (17 or more times) until SE9 xxx is
displayed.
▪ Enter the sequencing rate. Each press of the Parameter switch passes you
over a digit in the setting, making the digit blink. Holding the switch down for
more than a second changes whichever digit is currently displayed. If you
want to pass over a setting without changing any digits, keep pressing and
releasing the switch.
▪ The displayed sequencing rate is now selected, and operation of the dispenser
will be affected immediately. The displays will reset after a 10 second timeout.
18.
Hose Numb
er
Hose Number
The Hose Number (Pn, PnA and Pnb) identifies the dispensers hose(s) when the
dispenser is communicating to a forecourt controller such as the Compac Dispenser
Monitor.
Pn or PnA is the hose number of side A of the dispenser.
Pnb is the hose number side B of the dispenser
When using forecourt controller all dispenser hoses must have unique numbers.
To Set the dispenser hose numbers:
▪ Make sure that the dispenser is idle, with the nozzle in its holster.
▪ Press and release the Parameter switch until the required hose number is
displayed. (Pn, PnA or Pnb).
▪ Enter the hose number.
NOTE: Each press of the Parameter switch passes you over a digit in a setting,
making the digit blink. Holding the switch down for more than a second changes
whichever digit is currently displayed. If you want to pass over a setting without
changing any digits, keep pressing and releasing the switch.
▪ Let the parameter menu time out so that the value and quantity amounts are
displayed
Software Version HIA29.24.9CNG onwards:
From this version of software onwards the hose number(PN) display has been modified
to also display the following information:
▪ A count of the total error 9 faults in the unit shown in the price display.
▪ The display will also flash in the
screen, the last recorded reason for the
end of sale and the last recorded error 9.
This information can be used as a diagnostic aid to check whether error 9 faults are
occurring on a regular basis.
19.
Dispenser Software
Dispenser Software
The dispenser software version (P) is the version number of the software currently
loaded in the dispensers C4000.
See Dispenser Software Upgrade/Replacement for instructions on Upgrading dispenser
software.
To Identify the software Program Version Number:
▪ Make sure the dispenser is idle, with the nozzle in its holster.
▪ Press and release the Parameter switch once or until P is displayed. The
system enters a diagnostic mode whereby it displays the software program
version and performs a display segment test. It cycles through this program
for approximately 10 seconds before reverting to the normal display.
When displaying the program version data, the display panel shows P in the Dollars
screen and XXXXX. In the kilograms screen where XXXXX is the abbreviated
program version number. From example: Software version HIA29.26.0CNG will read
29260.
20.
End of Sale Indicators
End of Sale Indicators
The end of sale indicator allows you to determine the reason why the last fill ended.
This can be very useful for fault finding and diagnostics.
Recent versions of CNG software will flash the end of sale indicator in the price per
litre window at the end of each fill during normal operation. Older versions of software
will need to use the procedure below to view the end of sale indicator.
To View the End of Sale indicators:
▪ Press and release the Parameter switch until the required hose number (Pn,
PnA or Pnb) is displayed.
▪ The number in the unit price display is the end of sale indicator for the hose
number shown
See the table below for the meaning of the number displayed.
Number
Meaning
Checks
1
Nozzle switch de-activated (does not
apply to push to start dispensers).
2
Preset or temperature compensated value
reached. Normal end of sale message
for temperature compensated and Fast
Fill dispensers.
3
Fill timed out. Start button pressed, or
nozzle lifted, without flow.
Check inlet gas pressure.
Check solenoid operation.
Refer Solenoid Problems
Check nozzle and breakaway
for blockages.
4
The dispenser was stopped by a remote
device such as a Point of Sale (POS) or
Compac Communicator.
Check that the point of sale is
not sending a stop command
and is correctly configured.
5
Maximum display value reached.
Check display resolution (Sr)
setting. Refer Display
Resolution
7
An error has occurred. The error will be
shown on the main display.
Check error code reason.
Refer Error Codes
8
Outputs sequenced normally and
dispenser finished on the low flow cutoff
setting. Normal end of sale message for
regulator controlled dispensers
21.
End of Sale Indicators
Number
Meaning
Checks
12
Parity error on main display. This is
caused by a fault in the display or a bad
connection in the display wiring loom.
Check displays are dry and all
connections tight. Try
swapping with another display
if available.
14
Main display not detected. This is caused
by a fault in the display or a bad
connection in the display wiring loom.
See above.
20
The pressure at the first measurement
was within 20bar of the calculated
maximum pressure.
Check for blockage in the fuel
delivery hose, breakaway or
vehicle pipework.
21
The pressure at the second measurement
exceeded the calculated maximum
pressure.
Check for blockage in the fuel
delivery hose, breakaway or
vehicle pipework.
22
The pressure at the third measurement
exceeded the calculated maximum
pressure.
Check for blockage in the fuel
delivery hose, breakaway or
vehicle pipework.
25
Stop switch operated.
Check the stop switch wiring
and switch operation. Refer
CNG Dispenser Electrical
Schematic.
26
Twin pressure sensor values (when fitted)
do not agree.
Check pressure sensor
calibration.
30
Maximum flow rate exceeded.
31
Over-pressure switch has been activated.
32
Dispenser on Hold. (No fuel will be
dispensed).
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