Auto-Sleepers Ford Transit Custom Air Owner's Handbook (2023)
Official technical documentation and workshop diagnostics for Auto-Sleepers Ford Transit Custom Air Owner's Handbook (2023).
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
N/A | Gas supply cut off by the Truma Mono Control Crash Sensor Possible Cause: An accident with a deceleration of between 3g and 4g acting directly on the triggering element has occurred | Press the green button on the Mono Control inwards and hold it for approximately 10 seconds. It may be necessary to press with reasonable force, using a pen or pencil. | DIY Safe |
N/A | EC328PSU case becomes hot under heavy loads Possible Cause: Heavy electrical load causing heat generation in the power supply unit | ALWAYS ensure the ventilation slots have a clear flow of air. Do not place combustible materials against / adjacent to the EC328PSU. The PSU will shutdown if overheated and will restart automatically when cool. | DIY Safe |
N/A | Water level drops below 25% while the water pump power switch is turned ON Possible Cause: Fresh water tank level is low (less than 25%) | A warning beep will be heard and the LCD display will flash. To cancel the warning, press the select (◄) button. The warning will not be repeated unless the water pump power switch is turned off and on again. | DIY Safe |
N/A | Waste water level rises to 100% while the water pump power switch is turned ON Possible Cause: Waste water tank is full | A warning beep will be heard and the LCD display will flash. To cancel the warning, press the select (◄) button. The warning will not be repeated unless the water pump power switch is turned off and on again. | DIY Safe |
N/A | No 230 volt output from PSU Possible Cause: Connecting lead between the site and Leisure Vehicle not connected | Check and connect lead. Check also input connector at the base of the EC328PSU | DIY Safe |
N/A | No 230 volt output from PSU Possible Cause: RCD switched off | Reset RCD | DIY Safe |
N/A | No 230 volt output from PSU Possible Cause: RCD not operating correctly | Check supply polarity; if the RCD continues to fail contact your Dealer, as there is probably an equipment or wiring fault. | DIY Check / Tech Fallback |
N/A | No 230 volt output from PSU Possible Cause: MCB switched off | Reset MCB by switching OFF (down position) then back ON (up position), if the MCB continues to fail contact your Dealer, as there is probably an equipment or wiring fault. | DIY Check / Tech Fallback |
N/A | No 230 volt output from PSU Possible Cause: No or deficient supply from site | Contact site Warden for assistance | Professional Intervention Required |
N/A | No 230 volt output from PSU Possible Cause: Other fault | Contact your Dealer | Professional Intervention Required |
N/A | Reverse Polarity light is illuminated on PSU Possible Cause: Mains Supply reversed? | The reverse polarity light is designed to illuminate when the Live and Neutral supply has been reversed / crossed over. If the light illuminates there is a problem with the site supply or the cable connecting the supply to your vehicle. The light is designed to work on UK electrical supplies (where the neutral conductor is connected to earth at the sub station). If you are using your vehicle outside the UK this light may illuminate when no fault exists. In these cases consult the site warden for advice. | Professional Intervention Required |
N/A | Reverse Polarity light is illuminated on PSU when using a generator Possible Cause: Generator being used | The Reverse Polarity warning light is on when using my Generator. This is a normal side effect when using some types of generator. Instead of connecting the neutral conductor to earth, some generators centre tap the earth connection making both neutral and live conductors 110v above earth. This 110v difference causes the neon polarity indicator to illuminate. In most cases it is still safe to use the generator, but please consult the generator handbook for further information. | DIY Safe |
N/A | Control Panel has no display | Check batteries, turn EC328PSU charger switch on, and ensure mains supply is connected. Check control panel connecting lead at EC328PSU and behind Control Panel. Contact your Dealer | DIY Check / Tech Fallback |
N/A | Control Panel display corrupt / erratic function Possible Cause: Control panel software may have crashed. | Observe control panel handling instructions Control panel software may have crashed. Reboot control panel by turning off the EC328PSU charger switch and removing fuses 1 & 2 at the EC328PSU (2x20A fuses for leisure and vehicle batteries).Wait 30 seconds then replace the fuses and turn the charger switch on. (Alternatively, remove the bezel at the control panel by pulling down in the centre at the bottom, unplug the control panel multi-way connector, wait 30 seconds, then plug back in and reassemble.) | DIY Safe |
N/A | Control Panel contrast poor | Observe control panel handling instructions. Remove control panel as above but do not unplug. Carefully adjust contrast preset (small adjuster) on back of control panel using jewellers screwdriver | DIY Safe |
N/A | Control Panel current reading incorrect | Re-calibrate the current sensor as follows: With the charger switch turned off, and the power turned off at the control panel (no LED's on) Scroll down the display until battery current is shown. Hold down the select button (left arrow) until 'calibrating….' appears; keep the button pressed until the battery current reading reappears. Release the button. The current reading should now be correct | DIY Safe |
N/A | No 12 volt output from PSU Possible Cause: No 230v supply | Check all above | DIY Safe |
N/A | No 12 volt output from PSU Possible Cause: Charger not switched on | Switch charger switch on (I) position, switch will illuminate | DIY Safe |
N/A | No 12 volt output from PSU Possible Cause: Battery not connected and / or charged | Install charged battery | DIY Safe |
N/A | No 12 volt output from PSU Possible Cause: Power switch on control panel not switched to ON | Turn power on at control panel | DIY Safe |
N/A | No 12 volt output from PSU Possible Cause: Battery flat / Battery fuse blown | Recharge battery, check fuses, check charging voltage is present at battery | DIY Safe |
N/A | No 12 volt output from PSU Possible Cause: Fuse blown | Check all fuses are intact and the correct value fuse is installed as per fuse table | DIY Safe |
N/A | No 12 volt output from PSU Possible Cause: Equipment switched off / unplugged | Check equipment is switched on and connected to the 12v supply | DIY Safe |
N/A | No 12 volt output from PSU Possible Cause: PSU overheated / auto shutdown operated | Reduce load on system. Allow PSU to cool down. PSU will automatically restart when cool. | DIY Safe |
N/A | No 12 volt output from PSU Possible Cause: Other fault | Contact your Dealer | Professional Intervention Required |
N/A | Pump not working Possible Cause: Fuse blown | Turn pump on by pressing the pump button at the EC328 control panel (tap symbol) | DIY Safe |
N/A | Pump not working Possible Cause: Setting incorrect | Both the internal and external pump feeds are controlled from the EC328 control panel. To alter the setting of the pump switch (tap button) Ensure the setting matches your desired requirement. | DIY Safe |
N/A | Habitation 12V does not operate Possible Cause: Main 20A fuse blown | Check/Replace | DIY Safe |
N/A | Habitation 12V does not operate Possible Cause: Battery Discharged | Recharge | DIY Safe |
N/A | Habitation 12V does not operate Possible Cause: Switch on control panel in off position | Switch to on | DIY Safe |
N/A | Habitation 12V does not operate Possible Cause: Vehicle ignition “on” | Switch “off” ignition | DIY Safe |
N/A | Habitation battery not charging Possible Cause: Main 20A fuse blown | Check/Replace | DIY Safe |
N/A | Habitation battery not charging Possible Cause: Relay Fault | Refer to dealer | Professional Intervention Required |
N/A | Habitation battery not charging Possible Cause: Contacts dirty/loose on battery terminals | Clean and check for tightness | DIY Safe |
N/A | Battery does not hold its charge Possible Cause: Failed battery | Electrically test and replace if necessary | DIY Safe |
N/A | Battery does not hold its charge Possible Cause: Current being drawn | Check all appliances are off when not in use | DIY Safe |
N/A | Battery discharges over a short time with appliances operating Possible Cause: Poor battery cell condition | Electrically test battery | DIY Safe |
N/A | Battery discharges over a short time with appliances operating Possible Cause: Failed battery | Change battery | DIY Safe |
N/A | Battery discharges over a short time with appliances operating Possible Cause: Battery not fully charged | Fully recharge battery | DIY Safe |
N/A | No power to one or more 12V appliances Possible Cause: Circuit fuse blown | Find fault and replace fuse with same rating | DIY Safe |
N/A | Water pump not operating Possible Cause: Switch on panel “off” | Switch it “on” | DIY Safe |
N/A | Water pump not operating Possible Cause: Fuse blown | Find fault and replace fuse with same rating | DIY Safe |
N/A | No power on 12V socket outlet Possible Cause: Fuse blown | Find fault and replace fuse with same rating | DIY Safe |
N/A | Heater not operating/cuts Possible Cause: Fuse blown | Find fault and replace fuse with same rating | DIY Safe |
N/A | Heater not operating/cuts Possible Cause: Low battery charge | Recharge battery | DIY Safe |
N/A | Heater not operating/cuts Possible Cause: Unit fault | Refer to dealer | Professional Intervention Required |
N/A | Cooker Ignition not operating Possible Cause: Fuse blown | Find fault and replace fuse with same rating | DIY Safe |
N/A | Cooker Ignition not operating Possible Cause: Spark unit fault | Refer to dealer | Professional Intervention Required |
N/A | Fridge gas ignition not operating Possible Cause: Fuse blown | Find fault and replace fuse with same rating | DIY Safe |
N/A | Fridge gas ignition not operating Possible Cause: Ignition control switch fault | Refer to dealer | Professional Intervention Required |
N/A | Fridge does not operate on 12V when engine is running Possible Cause: Fuse in EM40 interface box blown | Find fault and replace fuse with same rating | DIY Safe |
N/A | Fridge does not operate on 12V when engine is running Possible Cause: Fault on fridge relay | Refer to dealer | Professional Intervention Required |
N/A | 230V system inoperative Possible Cause: No site power | Check site supply | DIY Safe |
N/A | 230V system inoperative Possible Cause: RCD/MCB switches tripped out | Reset circuit breakers | DIY Safe |
N/A | RCD/MCB keeps tripping out Possible Cause: Fault on 230V supply | Refer to dealer | Professional Intervention Required |
N/A | RCD/MCB keeps tripping out Possible Cause: Faulty appliance | Turn off all appliances, Isolate faulty appliances Refer to dealer | DIY Check / Tech Fallback |
N/A | Heater does not operate on 230v Possible Cause: No power | Switch on isolator switch/check MCB is on | DIY Safe |
N/A | Heater does not operate on 230v Possible Cause: Over temperature trip activated | Leave to cool down | DIY Safe |
N/A | Cooker Hotplate not heating up Possible Cause: No power | Switch on isolator switch/check MCB is on | DIY Safe |
N/A | Cooker Hotplate not heating up Possible Cause: Over temperature trip activated | Leave to cool down | DIY Safe |
N/A | Appliance will not light Possible Cause: No gas | Check isolation valve is open | DIY Safe |
N/A | Appliance will not light Possible Cause: Low battery (auto ignition) | Charge battery | DIY Safe |
N/A | Appliance lights but goes out immediately the FSD override is released Possible Cause: Flame supervision device (FSD) is not functioning correctly | Refer to dealer | Professional Intervention Required |
N/A | Odour Possible Cause: Gas leak | Turn off the gas at the cylinder and do not use the gas system until the problem has been rectified. Open all doors and windows to disperse any gas escape. In the event of a leaking cylinder, contact the site warden and/or the local gas supplier. | Professional Intervention Required |
N/A | Yellow flame Possible Cause: Lack of primary air, please note yellow tipping to the flame is normal | Refer to dealer | Professional Intervention Required |
N/A | Orange flame Possible Cause: Particles of dust or dirt in the mixing tube being carried through the burner ports | Reduce the amount of dust in air | DIY Safe |
N/A | Orange flame Possible Cause: Burner ports partially blocked | Refer to dealer | Professional Intervention Required |
N/A | Floating flame Possible Cause: Lack of secondary air | Check all vents are clear (air inlet to vehicle) If in an Oven Check the flue way is clear | DIY Safe |
N/A | Continuous running of water pump Possible Cause: No water | Fill tank | DIY Safe |
N/A | Continuous running of water pump Possible Cause: Major leak | Switch off immediately and check system | DIY Safe |
N/A | Continuous running of water pump Possible Cause: Pressure not set correctly | Adjust as page 7-1 | DIY Safe |
N/A | Intermittent operation of water pump Possible Cause: Minor leak in water system | Check push fit joints | DIY Safe |
N/A | Water pump does not operate Possible Cause: Fuse blown | Find fault and replace fuse with same rating | DIY Safe |
N/A | Water gauge does not operate Possible Cause: Probe fault | Refer to dealer (check probe connections) | DIY Check / Tech Fallback |
N/A | Slow drainage from sink/shower tray Possible Cause: Blocked breathers in waste tank | Drop tank and clear breathers | DIY Safe |
Frequently Asked Questions
Q: What should I do when the low battery level alarm sounds?
It is advised the vehicle is plugged into a 230v supply to recharge the leisure battery.
Q: How do I use the external BBQ point?
Connect the adaptor provided onto the outlet pipe of your barbeque. Then push the adaptor into the barbeque fitting on the vehicle and turn the red tap into the 'on' position. After use, turn the tap off and release the adaptor from the fitting.