Servicing should only be performed by a Qualified Service Agent
49
OPERATION & SERVICE
ELECTRONIC CONTROLS
Introduction
This section of the manual covers the electronic controls. The control system includes a
CCB (Central Control Board), a UIM (User Interface Module) and a Button Pad Overlay.
The control system constantly monitors and safely controls heating elements, water
temperature and other functions of the water heater. Information is continuously reported to
the user through text and icons on the liquid crystal display (LCD) portion of the UIM. Users
can navigate through multiple control system menus to view operational information and
change user settings.
CCB (Central Control Board)
UIM (User Interface Module)
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