Service Program; Introduction; Setting The Hysteresis; Displaying The Error History - A.O. Smith Cyclone BFC - 30 Installation And Service Manual

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12.1 Introduction

The service program is used by the installation
engineer or service and maintenance engineer for:
• Setting the hysteresis;
• Displaying the error history;
• Displaying the appliance
• Display the selected appliance;
• Switching the pump on or
• Setting the service interval;
• Setting the display contrast;
• Setting the display backlight
• Setting the display scroll
SERVICE MENU
»HYSTERESE
^ HISTORY OF ERRORS
È APPLIANCE HISTORY
SELECT APPLIANCE
PUMP RELAY
SERVICE INTERVAL
CONTRAST DISPLAY
TIME BACKLIGHT
SCROLLSPEED
These sub-menus are briefly described in the
following paragraphs. If you are not familiar in general
with how to use the displays and menus, first read the
relevant section (7 "The control
Note
The notation convention for the service menu is
identical to that of the main menu
convention for menu-related
difference is, you use to bring up the service
program, instead of which brings up the main
menu.

12.2 Setting the hysteresis

If the preset temperature (SETPOINT) is higher than
the current water temperature, then the appliance
might not immediately start the heating
cycle (9.3 "The appliance's heating
excessively frequent switching on and off, there is a
heating margin. We refer to this margin as the
Instruction manual BFC

Service program

history;
off;
time;
speed.
panel").
(11.2 "Notational
instructions"). The
cycle"). To prevent
hysteresis. The standard setting for this margin is 2°C.
The heating cycle starts if the water temperature drops
to 2°C below the SETPOINT and ends when the water
reaches 2°C above the SETPOINT.
HYSTERESE UP »3ÉC
Set the hysteresis via:
• : HYSTERESE UP
The figure shows an example
Set the hysteresis via:
• : HYSTERESE DOWN

12.3 Displaying the error history

Display the error history as follows:
• : HISTORY OF ERRORS
The controller will display an overview of "Blocking
errors" and "Lock out errors". In both cases, the
electronic 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
pressed, the "Lock out errors" are then displayed.
The figure shows an example of "Blocking errors". In
this case, the text HISTORY OF ERRORS is followed
by (B).
HISTORY OF ERRORS(B)
S04 SENSOR ERROR
F06 IONIZATION
È CO2 50 HZ ERROR
The figure shows an example of "Lock out errors". In
this case, the text HISTORY OF ERRORS is followed
by (L).
HISTORY OF ERRORS(L)
F02 FAN
F07 FLAME ERROR
È ...
Note
For an overview of all errors and the possible
causes, please refer to the relevant
chapter (13 "Troubleshooting").
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