Onboard water problem

[Leemallin]

Hi All
I have a swift conqueror with a onboard water tank when I try to use the water from the aquaroll the water pump constant runs and I have no water at taps,if I use onboard tank it all works fine.i have turned valve I both positions but still can't get it to work from aquaroll only ?

 

[Leemallin]

Forgot to mention I have 2 water inlets on the outside of caravan one for internal tank the other is a direct to aquaroll

 

[ProfJohnL]

Forgot to mention I have 2 water inlets on the outside of caravan one for internal tank the other is a direct to aquaroll

What make, model and year of caravan do you have?

 

[Leemallin]

2011 swift conqueror 570