What the manual says
Manufacturer manualWater pressure is to low (<0,7 bar), flashing FILL will alternate with indication of water pressure, boiler power of 50% is possible. The installation needs to be topped up.
DIY fix possible
Locate the external filling loop, which is a silver braided hose near the boilerOpen the small valve or tap on the loop to let water into the systemWatch the pressure gauge on the boiler screen until it reaches 1.5 barClose the valve tightly and check for leaks
Avoid the next call-out bill
A cover plan would handle faults like FILL: no call-out fees, no surprise bills.
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All 29 fault codes on the Q 30CR
Seeing a different code? Every code this model can display, in one place.