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Why is the “Power” of my boiler domestic hot water unit switched off after I switched off the domestic hot water heating function?

The domestic hot water heating function is switched off by powering off the domestic hot water unit of the boiler. In the case of domestic hot water control in the application, “Power” and “Operation Mode” function are coupled. When the domestic hot water function is powered off, the function can be activated again by the power button.

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