Explanation of the maintenance switch
The maintenance switch on the boiler is needed for
performing maintenance with the aid of the [Main-
tenance] function in the ETAtouch control system. This
displays the individual maintenance steps on the boiler
screen.
With this variant the heating mode is stopped, but
the boiler remains on at the mains switch. So that
all drives are disconnected, the safety chain of the
boiler is disrupted with the maintenance switch. The
screen will display a message when it is time to actuate
the maintenance switch.
Fig. 2-1: Maintenance switch
The maintenance switch is marked with the
symbol and has two settings.
• "1" = regular operation
This is the standard position of the maintenance
switch. The boiler can execute heating mode in this
position.
• "0" = maintenance mode
In this position, all drives are disconnected to
perform maintenance. The circuit boards,
however, are still live.
Display maintenance steps on the screen
With this boiler, the maintenance steps can also be
displayed on the ETAtouch control system screen. The
required activities will be explained to you step-by-step
and supplemented with detailed graphics. Each
maintenance is saved and the details can be viewed at
any time. So you can maintain a long-term overview of
the maintenance carried out. Of course, the
maintenance can also be carried out using the service
guide, without the support of the ETAtouch control
system.
To access maintenance, switch to settings in the boiler
function block ( [Settings] button) and then select
the function [Maintenance].
Fig. 2-2: Overview (example)
You can also access this overview by pressing
the maintenance switch. Also when the message
appears that maintenance of the boiler is required.
In the overview the different maintenance intervals are
listed in the upper area. This includes the maintenance
already carried out. With the button, information
about the selected maintenance is displayed.
Maintenance that you can carry out as an end
customer is labelled with the symbol. All others are
reserved for specialists and require authorisation.
Press the button to start the maintenance. The
individual steps are displayed on the screen. You can
switch to the next or the previous screen respectively
with the arrow keys on the left and right side of the
screen.
Fig. 2-3: Maintenance step (example)
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