While you wait for answers, we may have found some information which could help you.
Click here for Pressure Switch CheckPumped power shower boiling hot?
how can I fix Aqualisa twin shower pump 2bar.type1?
Aqualisa Axis low flow problem?
How can I fix my Aqualisa Classic Aquavalve 400 manual mixershower?
Aqualisa Aquastream shower?
pressure senors?