Viessmann Vitoligno 300-C Installation And Service Instructions Manual page 99

Service functions
(cont.)
Exiting the service menu
You can leave the service menu as follows:
Checking operating states, actuators and sensors
Operating states, actuators and sensors can be
checked in the following menus:
Under "Information"
■
Submenu in the extended "Standard menu".
■ Under "Diagnosis"
Submenu in the "Service" menu.
Note
Check the temperature values or states of the indica-
ted inputs for "function and logic".
Calling up the "Information" menu
Press the following keys:
1. "Menu" appears.
å
2. / for "Information".
| ~
Calling up the "Diagnosis" menu
Press the following keys:
1. + simultaneously for approx. 4 s.
d
å
The "Service" menu appears.
2. / for "Diagnosis"
| ~
Checking the outputs (actuators)
Danger
Activated charging devices (feed screw con-
veyor, screw conveyor, etc.) can cause block-
ages in the fuel discharge system during the
actuator test.
Activate charging devices only briefly.
!
Please note
Incorrectly connected actuators can cause dam-
age to the system.
During the actuator tests, check the respective
actuator carefully.
Diagnosis and service checks
By pressing
■
ä
Automatically after 30 minutes
■
■ Via menu point "Terminate service"
Examples of "function and logic":
■ Are the temperature values of the sensors in the nor-
mal range?
Is the state of the maintenance cover (open or
■
closed) correct?
■ Is the state of the light barrier (free or interrupted)
correct?
■ Residual oxygen content OK?
3. d to confirm.
4. / + for the required information in the
d
| ~
menu.
5. until the default display is shown.
ä
3. d to confirm.
4. / + for the required information in the
d
| ~
menu.
5. until the default display is shown.
ä
!
Please note
Overheating can damage the ignition element.
The required air supply is removed from the igni-
tion element by opening the combustion cham-
ber door or cover.
Always ensure that the combustion chamber
door and the covers on the boiler are closed
during start-up and heating operation.
The following displays appear in sequence:
"General"
■
"Boiler"
■
■ "Charging"
■ "Additional boiler"
■ "Heating circuit 1"
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