Re-pressure Vaillant Turbomax Plus boiler

Two pipes coming into boiler on right hand side have brass block valves with a small round recess. These two valves are linked with a stainless fill hose.

Inside the recess on each valve is a small slot, there is a "key" with the boiler but prob lost with the manual. The advantage of the key is its sized so you wont be poking it in the wrong place!

Using a screwdriver turn both slots throug 90 degrees, you will hear water running through. Sometimes one valve is left open so try a combination until the watert runs.

Keep an eye on the pressure gauge and dont let it get too high, if you have no idea of setting pressure head for about 1bar.

On my boiler the pressure keeps coming down to 0 i keep doing it up to 1.5 and now i have found the faulit water inlet pipe that goes outside the wall has water comming out what does that mean

Pressure releif vavle is passing either remove and clean bore and rubber plunger or replace
OR the pressure in the boiler is increasing by plate heat exchanger leaking or filling loop passing water
OR boiler overheating and causing high pressues