Changing The Language At The Control Unit; Function Sequence And Possible Faults - Viessmann Vitoplus 300 Service Instructions Manual

Initial start-up, inspection, maintenance
Further details regarding the individual steps
3. Set the current date with a/b.

Changing the language at the control unit

1. Press c.
The display shows "Select heating
circuit".
2. Press d.
3. After approx. 4 s press c.

Function sequence and possible faults

For further details regarding faults, see page 68.
Control unit is-
sues heat de-
mand
Yes
Oil pre-heating
starts
Yes
The fan starts
after max. 10 min
10
4. Confirm with d.
4. Select the required language with
b.
5. Confirm with d.
Display screen
No
after approx. 10
min
No
Fault
E6
No Fault
F9
(cont.)
Measures
Increase set
value and ensure
heat is drawn off
Check the oil pre-
heater, cables
and plug-in con-
nections
Check the oil pre-
heater, fan,
cables and plug-
in connections
(the oil preheater
has not switched
through; the tem-
perature is not
achieved)