hi is it displaying P5 or PS?
just checked my pure freedom trolley manual
and if it displays PS it means.......restricted water flow IE twisted hose, blocked water jets, dirt in system, trapped air?
ive allways found it to be air in system after emptying a 25L container, all i do is release one of my connections and run the pump until any bubbles disappear and the water runs free.
hope this helps
Tony