0020308119_02 Operating instructions 7
Control
element
Function
– Navigating through the menu
structure
– Reducing or increasing the set
value
– Navigating to individual num-
bers and letters
3.2 Displayed symbols
Symbol Meaning
Current burner modulation rate
(display in five levels).
Current system pressure
(display in five levels):
– Permanently on: Filling pres-
sure in the permitted range
– Flashing: Filling pressure
outside the permitted range
Heating mode activated:
– Permanently on: Burner off,
no heat demand
– Flashing: Burner on, heat
demand present
Heating mode is switched off
Domestic hot water generation
activated:
– Permanently on: Burner off,
no heat demand
– Flashing: Burner on, heat
demand present
Product with integrated do-
mestic hot water generation
or product with connected
domestic hot water cylinder
Comfort mode activated:
– Permanently on: Comfort
mode is activated
– Flashing: Burner on, comfort
mode on
Installer level active
Display locked
Connected to the system con-
trol
Connection to the Vaillant
server established
Symbol Meaning
Product is busy with a task.
Setting the time:
– Permanently on: Time is set
– Flashing: The time must be
reset
Warning
Fault in the product:
Appears instead of the basic
display, may be an explanatory
plain text display.
Limp home mode:
Appears instead of the basic
display, may be an explanatory
plain text display.
Maintenance required:
You can find more information
in code I.XXX.
Maintenance required:
Appears instead of the basic
display, may be an explanatory
plain text display.
3.3 Serial number
The serial numbers are located on the
underside of the front panel and on the
data plate.
The 3rd to 6th digits provide the produc-
tion date (year/week), the 7th to 16th digit
provide the article number for the product.
3.4 CE marking
The CE marking shows that the products
comply with the basic requirements of the
applicable directives as stated on the de-
claration of conformity.
The declaration of conformity can be
viewed at the manufacturer's site.
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