A.O. Smith TWI 35-200, Installation, User And Service Manual

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3.1.2.1 Symbols on the display
The symbols on the display give visual information about the status of the water heater.
Symbol Explanation
Water heating is disabled
End of water heating
(stand-by)
Water temperature drops
(during water heating
and when in stand-by)
Water temperature rises
(during water heating and
when in stand-by)
There is a heat demand
(Pre- and post-) purge
Air pressure switch is closed
A flame is detected
Gas control valve is open
Spark plug is activated / enabled
Error
Warning
3.1.3 Display buttons
With the buttons on the display, the menu of the water heater can be accessed.
Button Function
[MENU] Go to menu
[BACK] One step back in menu . Changed settings will
not be saved
[ACCEPT] Save changed settings
[ ] Value up
[ ] Value down
[>] Enter the submenu
20 User part