Fill the header tank.
Open the left hand door on the Rain Director Control unit.
You will see several pipes and one of the pipes splits into two pipes, this is the mains water feed.
On the left hand pipe ( of the two ) you will see a quarter turn valve with arrows on it. The arrows should be orientated left to right.
Open the valve so the arrows point up and down ( it could be quite tight ) to manually fill the headet tank with mains water.
When the header tank is full close the valve.
Press the “Rain Drop” button on the control panel
Has the red spanner light turned off?