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Topic: Truma pump problems

scrufts

04/8/2015 at 6:27pm
Location: None Entered
Outfit: Coachman Amara 640 6

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We are currently on a service pitch with water fed into the aquaroll. The pump is very intermittent and will run for about five seconds and then switch off. Sometimes you keep having to switch the pump on and off at the control panel to get it to run.I suspect that the surge samper/pressure switch may be at fault and have tried adjusting the aligning screw in the side of the unit but still no joy. This is the first time we have ever had this problem. Caravan is Coachman Amara 640/6 2009 which we have had from new.set up is a truma ultraflow.

G7ACU

04/8/2015 at 11:36pm
Location: West Mids
Outfit: Swift Ace Statesman & X-Trail 2.0

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Quote: Originally posted by scrufts on 04/8/2015
... Sometimes you keep having to switch the pump on and off at the control panel ...

Is the pump running and not drawing water or is the pump completely inoperative when you have the fault? Have you checked what seems the obvious to make sure it isn't simply the pump switch?

The pressure switch could be the other candidate, but if the pump doesn't run then you need to arm yourself with a multimeter to help trace if there's supply voltage where expected, starting at the inlet housing. The brass contacts on the inlet could be tarnished and effecting the pump, plus double check the wiring from the pump into the trigger fitting. The wiring can fray from connection/disconnection and occasionally need remaking.

To avoid any confusion, work from one end to the other. The surge damper isn't likely to be a problem given the symptom.

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scrufts

05/8/2015 at 4:35pm
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Outfit: Coachman Amara 640 6

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Thanks for the advice. Have spent most of the day going through the system and I think I have traced it to a loose connection in the pump itself- wiggle it a bit and the pump runs intermittently - trouble is I presume its a sealed unit as I can't see how to take it apart.

The 2 Tops

05/8/2015 at 6:24pm
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Outfit: Swift Challenger Sport 524 VW Carave

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If the problem is a broken or loose wire in the submersible part of the pump, then it looks as though a replacement is needed.
Bertie.

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scrufts

05/8/2015 at 7:59pm
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Outfit: Coachman Amara 640 6

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Oh #%*£* !
I thought that was going to be the answer..... Pity I can't diassemble it, re connect the wires and reseal with silicone sealant or something ! Me hates throwing away stuff that could be repaired. If I get a new one I might still have a go at the rogue one just for the sake of it !

tango55

05/8/2015 at 8:29pm
Location: Lichfield
Outfit: Coachman Amara 450

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I have had this problem myself in the past but every time it has been nothing more than the contact pins in the plug connector that need prizing open slightly with a flat screwdriver and cleaning with a little spray of WD40 in both the plug and socket. What causes the problem is that when you withdraw the water pump housing connector you have to wiggle it about which slightly closes the contacts over time thus not creating a circuit so wiggling it about starts and stops the water pump which sounds like this is happening with your connector.

scrufts

05/8/2015 at 9:43pm
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Outfit: Coachman Amara 640 6

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Interesting. I have sanded the connectors to remove any corrosion and also ensured they fit snuggly. I'll certainly try another 'wiggle' tomorrow and see if it is the connector as opposed to the pump,

tango55

05/8/2015 at 10:08pm
Location: Lichfield
Outfit: Coachman Amara 450

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What I do occasionally is use 'Brasso' with cotton wool buds to remove any surface corrosion from the female contacts and then use WD40 to clean the pins as it is safe to use on electrical components.

john#mel#3kids!

06/8/2015 at 8:25pm
Location: west yorks
Outfit: Vango inspire 600xl 5m bell tent

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I had this problem, mine would run then stop, then run ect, I cleaned all the connections up and gave it a wiggle, also the surge damper needed the tiny screw in the front turning clockwise until when I turned on the tap the pump wouldn't stop, then turn it anti clockwise until the pump switches off just after the tap is closed.
Hope that makes sense!!

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