Auto-Sleepers Water System
(Corinium Duo, 2017 Model Year)
View official manual on manufacturer's site ↗Also Fitted To This Caravan
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | Water pump will not run (Water system) | — | Make sure the plug and socket contacts are clean and seated properly, and check the wiring connections. | DIY Safe |
N/A | The water pump switches on and off even with the tap shut (Water system) | — | Look for air or water leaks at the taps and pipework, and readjust the pressure switch. | DIY Safe |
N/A | The water pump motor keeps running continuously and won't stop (Water system) | — | Confirm the container actually has water in it - a battery reading below roughly 10.5V can also be the cause. Adjust the pressure switch and/or recharge the battery, and check every pipework connection. A Whale Tiptoe Pump, fitted in-line alongside the submersible pump, can serve as a manual backup. | DIY Safe |
N/A | Water pump doesn't switch off when taps are closed, or pulses on/off when taps are fully open (Water system) | — | To readjust the pressure switch: with the system fully primed and every tap shut, wind the screw clockwise, in a right-hand direction, until the pump kicks in; open whichever tap sits furthest away and let it run smoothly, then shut it; slowly back the screw off anti-clockwise until the pump cuts out, then continue a further half-turn (180 degrees); finally check every tap individually operates correctly. | DIY Safe |
N/A | Water pump runs continuously even with taps closed (Water system) | Present voltage is significantly lower than when last adjusted, or the water container is empty - risk of pump failure and a flat battery | Re-adjust the pressure switch or refill the water container. | DIY Safe |
N/A | The water pump won't run at all, even though the fuse is intact and connections are sound (Water system) | This is most often down to the pump having run continuously for too long. | Replace the pump and readjust the pressure switch. | DIY Safe |
Recommended partAffiliate linksView partHideAuto-Sleepers fits a Whale submersible pump in this water system but doesn't name the exact model, so this is the standard current Whale replacement rather than a documented exact match - check the pump fitted in your tank before ordering. Whale GP1002 Standard 12V Submersible Water Pump, 10 Litres~£19.914.6★ (1,000+ ratings), Whale-branded, sold by Serenity Garden Ltd, dispatched by Amazon View on Amazon → | ||||
N/A | The water pump cycles on and off repeatedly, giving a pulsing flow at the tap, or the water temperature won't stay constant (Water system) | The current voltage has risen well above what it was when the switch was last set. | Readjust the pressure switch - if that doesn't resolve it, fit a Whale Surge Damper. | DIY Safe |
N/A | The water pump is very noisy but isn't actually pumping any water (Water system) | Pump is air-locked after the water container was refilled | Unplug the pump from its socket to let it flood, then reconnect. Always unplug the pump before placing it in the container when refilling, then reconnect. | DIY Safe |
N/A | Water pump not operating | Switch on panel 'off' | Switch it 'on' | DIY Safe |
N/A | Water pump not operating | Pressure switch on pump not operating | Refer to dealer | Professional Intervention Required |
N/A | Water pump not operating | Fuse 4 blown | Track down the fault and fit a replacement fuse of the identical rating. | DIY Safe |
Recommended partsAffiliate linksView 2 optionsHideCheck whether the blown fuse is a standard or a mini blade fuse (mini ones are roughly half the size), then choose the matching kit: This fault doesn't say which fuse rating has blown, only to replace it like-for-like. Both kits cover the common ratings (5A-30A) - match the rating printed on the blown fuse. Standard blade fusesCar Fuse Kit - 60pc Assorted Blade Fuses (5A-30A) with Storage Case and Fuse Puller~£5.994.5★ (1,500+ ratings), sold by KANGRUI, dispatched by Amazon - includes 15A blade fuses plus a puller and storage case View on Amazon →Mini blade fusesNilight 120pc Mini Blade Fuse Assortment (5A-30A, ATM/APM) with Fuse Puller~£5.244.5★ (2,500+ ratings), sold by Amazon - includes 15A mini blade fuses View on Amazon → | ||||
N/A | Continuous running of water pump | No water | Fill tank | DIY Safe |
N/A | Continuous running of water pump | Major leak | Turn the system off straight away and check it over. | DIY Safe |
N/A | Continuous running of water pump | Pressure not set correctly | Adjust as page 7-3 | DIY Safe |
N/A | Intermittent operation of water pump | Minor leak in water system | Check push fit joints | DIY Safe |
N/A | Water pump does not operate | Fuse 4 blown | Track down the fault and fit a replacement fuse of the identical rating. | DIY Safe |
Recommended partsAffiliate linksView 2 optionsHideCheck whether the blown fuse is a standard or a mini blade fuse (mini ones are roughly half the size), then choose the matching kit: This fault doesn't say which fuse rating has blown, only to replace it like-for-like. Both kits cover the common ratings (5A-30A) - match the rating printed on the blown fuse. Standard blade fusesCar Fuse Kit - 60pc Assorted Blade Fuses (5A-30A) with Storage Case and Fuse Puller~£5.994.5★ (1,500+ ratings), sold by KANGRUI, dispatched by Amazon - includes 15A blade fuses plus a puller and storage case View on Amazon →Mini blade fusesNilight 120pc Mini Blade Fuse Assortment (5A-30A, ATM/APM) with Fuse Puller~£5.244.5★ (2,500+ ratings), sold by Amazon - includes 15A mini blade fuses View on Amazon → | ||||
N/A | Water gauge does not operate | Probe fault | Refer to dealer (check probe connections) | DIY Check / Tech Fallback |
N/A | Slow drainage from sink/shower tray | Blocked breathers in waste tank | Drop tank and clear breathers | DIY Safe |
N/A | Unsatisfactory operation of water pump | Filter blocked | Refer to dealer | Professional Intervention Required |
N/A | Pump feed does not operate (PSU control panel) | A fuse has blown | Replace with the correct-rated fuse, per the fuse table. | DIY Safe |
Recommended partsAffiliate linksView 2 optionsHideCheck whether the blown fuse is a standard or a mini blade fuse (mini ones are roughly half the size), then choose the matching kit: This fault doesn't say which fuse rating has blown, only to replace it like-for-like. Both kits cover the common ratings (5A-30A) - match the rating printed on the blown fuse. Standard blade fusesCar Fuse Kit - 60pc Assorted Blade Fuses (5A-30A) with Storage Case and Fuse Puller~£5.994.5★ (1,500+ ratings), sold by KANGRUI, dispatched by Amazon - includes 15A blade fuses plus a puller and storage case View on Amazon →Mini blade fusesNilight 120pc Mini Blade Fuse Assortment (5A-30A, ATM/APM) with Fuse Puller~£5.244.5★ (2,500+ ratings), sold by Amazon - includes 15A mini blade fuses View on Amazon → | ||||
N/A | Pump feed does not operate (PSU control panel) | Pump switched off | Press the pump button on the control panel to switch it back on. | DIY Safe |
N/A | Pump feed does not operate (PSU control panel) | Pump setting incorrect | The control panel governs the pump's feed, both internal and external, as one setting - if it needs changing, that's a job for your dealer, so confirm it matches what you actually need. | Professional Intervention Required |
Frequently Asked Questions
Q: How do I winterise the water system before storing the vehicle for winter?
Open the drain valve next to the water heater, and leave the fresh and waste water tank drain taps open too. Open every internal tap, then run the pump until it stops delivering anything. Go for a short spin with those drain taps still open - it helps shift the last of the water out of the tanks and pipework. Pull the sink plugs so the system can breathe, give the waste tank a thorough flush to shift any debris, finish with a flush of mild disinfectant, and leave the drain tap open.