Auto-Sleepers Coachbuilts Owner's Handbook (2023)
Official technical documentation and workshop diagnostics for Auto-Sleepers Coachbuilts Owner's Handbook (2023).
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
N/A | An electrically operated rear step is left extended when the ignition is switched on Possible Cause: The rear step has not been retracted before starting the vehicle | A buzzer positioned behind the dashboard will sound and continue to do so until the rear step has been fully retracted. | DIY Safe |
N/A | Water pump will not run | Check contacts in plug and socket are clean and making contact. Check wiring connections. | DIY Safe |
N/A | Water pump cycles on/off with tap closed | Check for air or water leaks in taps and piping. Re-adjust pressure switch. | DIY Safe |
N/A | Pump motor runs steadily and will not stop Possible Cause: Battery voltage may be too low (at or below 10.5 volts), or container may be empty | Check that there is water in the container. Adjust pressure switch and/or recharge battery. Check all connections in pipe-work. | DIY Safe |
N/A | Pump runs continuously, even with the taps closed Possible Cause: Present voltage could be significantly lower when last adjusted, or water container may be empty | Re-adjust switch or refill container. | DIY Safe |
N/A | Pump does not run at all and the fuse is not blown and the connections are intact Possible Cause: Excessive continuous running | Replace pump and readjust switch. | DIY Safe |
N/A | Pump runs intermittently ON, OFF, ON, OFF etc. (seen as pulsing flow from tap, or inability to set constant water temperature) Possible Cause: Present voltage is significantly higher than when last adjusted | Readjust pressure switch and if problem persists add a Whale Surge Damper. | DIY Safe |
N/A | Pump runs very noisily but does not pump water Possible Cause: Pump is air-locked and is fighting to get air out and water in | Unplug from the socket, allowing pump to flood and reconnect by plugging in again. The correct sequence when refilling the container is to unplug, put pump into container, then reconnect. | DIY Safe |
N/A | Dirt and frost preventing the electric step from operating properly Possible Cause: Accumulation of dirt or frost in moving parts | Clean or defrost the moving parts. | DIY Safe |
N/A | Solid waste matter building up and blocking the waste tank outlet tap Possible Cause: Collection of foreign matter and solid waste inside the waste water tank | Drop the tank for cleaning, access through the large diameter fitting in the tank top, flush out the tank in an inverted position and remove all solids. | 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 when not in use | Check all appliances are off | 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 withsame 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 withsame 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 out Possible Cause: Fuse blown | Find fault and replace fuse with same rating | DIY Safe |
N/A | Heater not operating/ cuts out Possible Cause: Low battery charge | Recharge battery | DIY Safe |
N/A | Heater not operating/ cuts out Possible Cause: Unit fault | Refer to dealer | Professional Intervention Required |
N/A | Heater not operating/ cuts out Possible Cause: No power | Switch on isolator switch/check MCB is on. | DIY Safe |
N/A | Heater not operating/ cuts out Possible Cause: Over temperature trip activated | Leave to cool down. | DIY Safe |
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 appliance Refer to dealer | DIY Check / Tech Fallback |
N/A | RCD/MCB keeps tripping out Possible Cause: Overload on current consumption by appliance | 10A maximum available Refer to dealer | Professional Intervention Required |
N/A | Cooker Hotplate not heating up Possible Cause: No power | Check MCB is on | DIY Safe |
N/A | Appliance will not light Possible Cause: No gas | Check isolation tap 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 isolation tap 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 partically 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 section 7-3 | 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 | No hot water (230V system) Possible Cause: No power | Switch on isolator switch/check MCB is on | DIY Safe |
N/A | No hot water (230V system) Possible Cause: Overtemperature trip activated | Leave to cool down | DIY Safe |
N/A | No hot water (diesel system) Possible Cause: Heater module not lighting | Refer to dealer | Professional Intervention Required |
N/A | No hot water (diesel system) Possible Cause: Igniter not working | Check 12V switched on | DIY Safe |
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: How do I restore the gas supply if the Truma Mono Control Crash Sensor trips after an accident?
Press the green button on the Mono Control inwards and hold for approximately 10 seconds. It may be necessary to press with reasonable force, using a pen or pencil.
Q: How do I manually close the gas outlet valve at the LPG tank underneath the vehicle in an emergency?
Remove the valve housing cover by releasing the black plastic clip, then turn the large brass knob clockwise to close the outlet valve.
Q: How do I remove scratches from acrylic windows?
Use an Acrylic Window Polish to remove unwanted scratches and blemishes leaving a clear, haze free finish. Minor scratches can be polished out directly.
Q: How do I remove discolouration or fading from the glassfibre bodywork?
Use a mild abrasive, which removes a thin layer of the discoloured surface, to restore the bodywork to its original colour and surface lustre.