A.O. Smith AHD 290 - Manual (Page 55)

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P5: Operating thermostat for electrical cartridge
The sanitary water temperature may be adjusted between 0 - 65°C. The
electric cartridge solely heats the top half of the container, while the heat
pump still heats the lower half of the container.
Factory setting: 50°C
Display indication
It is possible to view various temperatures in the display, by pressing the
arrows until the required temperature has been shown.
After app. 5 seconds, the temperature is shown. The temperature is shown
for app. 30 seconds until the display returns to standard. Following tem-
peratures may be shown:
T4: Extra sensor for free use or forced operating input
T5: Pre cooling surface
T6: Cooling surface
T7: Domestic water top
T8: Domestic water bottom
T9: Extra sensor
+
1.2 Altering of the operation data
Usually, the display shows the water temperature.
Press (arrow up) and (arrow down) simultaneously for app. 10 seconds in order
to enter the operating menu. To show the chosen value press The display will
now show the first point E0 in the operating menu. The operating menu will
close and return to the main menu if a button has not been pressed for 15
sec.
If you wish to scroll through the operating menu, it may be done by pressing
(arrow up) or (arrow down). The value of a point is shown when pressing (temp
button). The value may be changed with the (arrow up) or (arrow down) while
simultaneously pressing (temp button). The control will return to standard indica-
tion if no buttons have been pressed for app. 15 seconds.