Servicing should only be performed by a Qualified Service Agent
41
ELECTRONIC CONTROLS
ELECTRONIC CONTROLS
This section covers the electronic control system used on Electronic Control Models - see
Figure 1 on page 9. The control system includes a CCB (Central Control Board) and a UIM
(User Interface Module).
The CCB constantly monitors safely controls, heating elements, water temperature and
other functions of the water heater. Operational information is continuously reported to the
user through text and icons on the liquid crystal display (LCD) portion of the UIM. When
there are operational problems Fault and Alert messages will also be displayed. Users can
navigate through multiple control system menus to view operational information and change
user settings - see the Electronic Control System section beginning on page 48.
CCB (Central Control Board)
UIM (User Interface Module)
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