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12
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
•
Displaying the appliance
•
Switching the pump on or
•
Setting the service
interval;
•
Setting the display
contrast;
•
Setting the display backlight switching
•
Setting the display scroll
•
Setting the stage difference for the
•
Setting the pump running-on
SERVICE MENU
»HYSTERESIS
^ HISTORY OF ERRORS
È APPLIANCE HISTORY
SELECT APPLIANCE
PUMP RELAY
SERVICE INTERVAL
DISPLAY CONTRAST
BACKLIGHT TIME
SCROLL SPEED
STAGE DIFFERENCE
PUMP POST PURGE
These submenus 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
(7 "The control panel")
Note
The notation convention for the service menu is
identical to that of the main menu
convention for menu-related
difference is that you use
program, instead of
, which calls up the main menu.
12.2 Setting the hysteresis
If the preset temperature (SET POINT) is higher than
the current water temperature, the appliance might not
immediately start the heating cycle
appliance's heating
cycle"). This is caused by the built-
in safety margin. To prevent excessively frequent
switching on and off, there is a heating margin. This
margin is called the hysteresis. The hysteresis can be
set DOWN (negative hysteresis). The hysteresis can
be adjusted between 2°C and 7°C.
Set the hysteresis DOWN as follows:
Instruction manual GWV
Service program
history;
selection;
off;
period;
speed;
appliance;
time.
chapter.
(11.2 "Notational
instructions"). The
to call up the service
(2.3 "The
•
: HYSTERESIS DOWN
The figure shows an example.
HYSTERESIS DOWN
»4ÉC
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, three points (...) are displayed. The display
first shows the "Blocking errors". When
pressed, the "Lock out errors" are displayed.
The figure shows an example of "Blocking errors". The
HISTORY OF ERRORS text is followed by (B).
HISTORY OF ERRORS(B)
S04 SENSOR ERROR
F06 IONISATION
È CO2 50 HZ ERROR
The figure shows an example of "Lock out errors". The
HISTORY OF ERRORS text is now 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").
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.
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Table of Contents
Troubleshooting
