To Next PageTo Next PageWhy does the Compac Dispenser pressure gauge creep past 200 bar when not in use?
If the dispenser pressure gauge creeps past 200 bar when the Compac Dispenser is not in use, it could be because the regulator center seal is damaged, so replace the Regulator Valve Seals. Alternatively, the solenoid piston seal might be damaged, so replace the Solenoid Valve Seal.
What causes the Compac Dispenser to over fill the vehicle?
If the Compac Dispenser is over filling the vehicle, it could be because the regulator pressure is set too high, so adjust the Regulator set pressure. Another reason could be that the regulator seal is worn out, so you should clean the regulator and replace the valve seals. Also, fast fill or temperature compensation variables may be incorrectly set, so check that pressure transducers are calibrated and all parameters are correct, and replace transducers if they cannot be calibrated.
How to troubleshoot a Compac CNG when the solenoid is not opening?
If the solenoid is not opening on your Compac Dispenser, check that the power is reaching the coil and it is energizing. Place a screwdriver (or similar metal object) over the top of the coil and feel the magnetic field created by the energized coil. If there is no magnetic field check the LED for the triac. If the triac LED light is coming on check that the triac is delivering power. If the triac is delivering power but the coil is not energizing then the coil is burnt out. Replace the solenoid coil and investigate why it has failed.
What causes the solenoid coil to burn out in a Compac Dispenser?
If the solenoid coil in your Compac Dispenser is burnt out, it could be due to several reasons. Dirt or water in the solenoid may have prevented the armature from rising and opening the solenoid, causing the coil to overheat and burn out. In this case, replace the solenoid coil, clean the solenoid, replace the valve seals, change the filter, and remove the water source or install a drier. High voltage or voltage spikes could also cause the solenoid coil to burn out, so fit a voltage stabilizing UPS to the dispenser power supply and replace the solenoid coil. Additionally, if the coil has been removed from the solenoid and energized, it can burn out, so replace the solenoid coil.
Why is the Compac CNG slow filling the vehicle?
If your Compac Dispenser is slow filling the vehicle, it could be due to moisture in the gas mains causing freezing in one or more of the valves. This often occurs when water has not been cleared out of the gas pipes after testing. To resolve this, pour boiling water onto the pipework where the freezing has occurred until the ice has thawed and the gas can flow, and contact your gas supplier.
What causes the solenoid to not seal in a Compac CNG?
If the solenoid is not sealing in your Compac Dispenser, it could be due to damaged solenoid piston seals. In this case, clean the solenoid and replace the valve seals. Another possible cause is dirt or water in the gas supply. To resolve this, clean the solenoid and replace the valve seals, change the filter, and remove the water source or install a drier.
What to do if a display LCD segment is always on or off on Compac Dispenser?
If a display LCD segment is always on or always off on your Compac Dispenser, it indicates a faulty display unit. In this case, replace the Display PCB.
What does it mean when the watchdog LED D5 is illuminated on a Compac CNG?
If the watchdog LED D5 is illuminated on your Compac Dispenser, it indicates that a processing fault has occurred. To resolve this, turn the power to the dispenser off and then on again to reset the watchdog. If the light still illuminates, there may be a fault on the C4000 microprocessor board, such as a loose memory chip or a broken track. In this case, replace the C4000 memory and software chips. If it doesn't help, replace C4000 processor board.
Why are the C4000 electronics not working in my Compac Dispenser?
If the C4000 electronics in your Compac Dispenser are not working, with the indicator LEDs off and no response when lifting the nozzle, it could be due to unacceptable voltage spikes causing the fuses on the C4000 to blow. In this case, fit a voltage-stabilizing UPS to the dispenser. Another reason could be low input voltage, so turn the dispenser off and then on again, and check the power supply connections and input voltage to the dispenser with a multimeter. A voltage-stabilizing UPS will also be required.
What to do if Compac CNG displays PA:uSE?
If the Compac dispenser displays PA:uSE after powering on, and the countdown from 60 doesn't start, it could be due to a couple of reasons. For push to start dispensers, the start button might be held down, so release the start button. Alternatively, the nozzle might not be stowed properly, or the nozzle switch might be active, so correctly stow the nozzle.
Guide to best practice for preparing and cleaning distribution pipework.
Steps for mounting the dispenser onto a foundation or plinth.
Procedure for connecting gas inlet pipes to the dispenser.
Specifications for power and comms cable types and sizes.
Wiring procedure for power and communication to the C4000 Termination Board.
Location and function of the Parameter switch on the C4000 processor.
Common issues when the dispenser is not in use and their solutions.
Causes and solutions for issues preventing a fill from starting.
Common problems encountered during the vehicle refuelling process.
Indicates problems with the dispenser via screen codes.
General