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When "tS" symbol is displayed on the screen, press K1 once again to access the password entry
screen.
The number 03 is selected with the heater water temperature adjustment buttons and the password
is confirmed with one of the domestic water adjustment buttons (K5 or K6). The values "P" and "00"
will blink alternately on the screen. At this stage, the value "1" is selected with K3 and K4 and the
boiler is set to "MT".
Then, you can return to the main screen by pressing and holding K1 for 5 seconds.
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