Hi all ..I have a vailiant ecotech pro 24W condensing boiler (serviced every year)..when boiler is cold the pressure is 1.2 bar (boiler has a analogue bar pressure dial as well as a digital display )when I turn the dial to increase the temperature to 60 the pressure goes up to 2.4 bar but if on a very cold day I turn the heating temperature dial to max which is 75 then the pressure goes up to 2.8 to 3.0 bar which is in the bottom end of the red zone and the digital display flashes 2.8 or 3.0 ..is this a warning that the bolier is operating at a to high pressure?或这是正常数字显示闪存像警告