Cold water system

Its a swift conqueror 580 sal 2004

All water vessels full

Both pumps working

There is a switch to change from onboard tank to aquaroll.

A tank fill switch

A valve by the on board tank

We had it all working off the onboard until i needed to refill it

I have a 2008 ace I have a very similar problem on accasions pump is working but no water usually an airlock. Try unplugging the fillter pipe from the van take fillter out of aquarole then put fillter back into aquarole giggle it about then plug it into the connecter on the side of van turn on hot water tap this usually works.

 oops I think that should be jiggle. 

Did you remove the external pump after filling ?

Did you return the valve under the seat to the using position rather than the fill position?

It's not quite the same, KG. The OP has pumped water from his Aquaroll into the onboard tank but cannot then pump it from the tank to get it to come out of the taps. 

It would seem logical that the external pump, when selected,  could supply the taps direct from the Aquaroll, and that the internal pump, when selected,  could supply water from the onboard tank, but there is the added complication of the tank fill switch.

Instructions for filling say to plug in the external pump, select external pump on control panel and turn it on using another switch, presumably the tank fill switch.  one also needs to have a valve on the pipework in the correct position to allow water to flow into the tank.

Once the tank is full, according to the handbook,  the external pump should be deselected, the tank fill switch turned off, the external pump umplugged, and presumably the pipe valve returned to its using position, though this is not stated.

It then refers to selecting internal pump and opening a tap.

It makes no mention of using direct from the Aquaroll at this point, though it says earlier that this is possible.

Seems very complicated compared to our 2008 system which uses only one, internal pump to fill tank and use from either in or out by means of 2 valves on the pipework which can be combined in 3 different positions.

If GC's system has only one valve with 2 positions, one position must allow filling of tank and the other position allow water to flow direct to the taps from outside.

The question is which is the correct position for using from the tank, possibly the filling position?  In which case the valve should not be altered when moving between "filling tank" and "using from tank".

As you said TW, very tricky to advise without seeing exactly what is there!

I think you've summed it up, Kjell, as far as it's possible to without being on hand. 

Mmm, I've now had a look at the water layout diagram in a 2004 handbook, seems to be only one valve, so a fill/use tank position, and a use Aquaroll position.

The wiring diagram in the 2004 technical handbook does not shed much light on how the various switches interface, so I just wonder if having the external pump plugged in somehow interferes with getting water to the taps, as it specifically says to unplug it after filling.

With a switch that selects only one pump at a time, I cannot see how having the external pump in place should affect anything.