A.O. Smith BFC Cyclone 120, Installation, User And Service Manual

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The standard setting for the hysteresis is 5°C. The operating cycle starts when the water
temperature drops to 5°C below the SETPOINT and ends when the water reaches 5°C
above the SETPOINT.
Set the hysteresis as follows:
[ ]: HYSTERESIS UP
The figure shows an example
Set the hysteresis as follows:
[ ]: HYSTERESIS DOWN
9.2.2 Display the error history
Display the error history as follows:
[ ]: ERROR HISTORY
The controller will display an overview of "Blocking errors" and "Lock out errors". In both
cases, note that the controller reserves 15 lines for the last 15 error messages. If there
are fewer than 15 error messages, an ellipsis (...) is displayed. The display first shows the
"Blocking errors". When [ENTER] is pressed, the "Lock out errors" are then displayed.
The figure shows an example of "Blocking errors". In this case, the text ERROR HISTORY is
followed by (B).
The figure shows an example of "Lock out errors". In this case, the text ERROR HISTORY is
followed by (L).
Note
For an overview of all errors and the possible causes, please refer to the relevant chapter
(see section 11.1).
9.2.3 Display the water heater history
The water heater history sub-menu is used to display the burning hours, the number of
ignitions, the number of flame errors and the number of ignition errors.
Call up the menu for displaying the water heater history as follows:
[ ]: APPLIANCE HISTORY
The figure shows an example.
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80 Installation, Maintenance and Service part