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Instruction manual SGS
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is
12
Service program
12.1 Introduction
The service program is used by the installation 
engineer or service and maintenance engineer for:
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 chapter
Note
The notation convention for the service menu is 
identical to that of the main menu
. The 
difference is, you use 
 to bring up the service 
program, instead of 
 which brings up the main 
menu.
12.2 Setting the hysteresis
Call up the menu to set the hysteresis as follows:
: HYSTERESE DOWN
For all appliances, the range is 2...7 
o
C.  The default 
setting for this value is 5 
o
C.
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 
 is 
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).
The figure shows an example of "Lock out errors". In 
this case, the text HISTORY OF ERRORS is followed 
by (L).
Note
For an overview of all errors and the possible 
causes, please refer to the relevant 
chapter
.
12.4 Displaying the appliance history
The appliance history submenu 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 appliance history 
as follows:
: APPLIANCE HISTORY
The figure shows an example.
SERVICE MENU
 »HYSTERESE
^ HISTORY OF ERRORS
È APPLIANCE HISTORY
SELECT APPLIANCE
SERVICE INTERVAL
ANTI LEGIONELLA
SETTINGS SOLAR
SETTINGS HEATING
HYSTERESE DOWN
»3ÉC
HISTORY OF ERRORS(B)
S04 SENSOR ERROR
F06 IONIZATION
È CO2 50 HZ ERROR
HISTORY OF ERRORS(L)
F02 FAN
F07 FLAME ERROR
È ...