Viessmann Vitodens 300 - Service Scans and Diagnostics

Function Key combination Exit Page
Temper atures, boile r c od-
ing card and brief s cans
Press K an d G simulta-
neously for approx .
2 seconds
Press d 65
Relay test Press K and d simulta-
neously for approx .
2 seconds
Press d 69
Max. output (heating
mode)
Press K an d F simulta-
neously for approx .
2 seconds
Press d 18
Operating con dition Press c Press c 71
Maintenanc e sca n c (if "Maintenance"
flashes)
Press d 39
Adjusting the display con-
trast
Press d and b simulta-
neously; di splay darkens
––
Press d and a simulta-
neously; di splay becomes
lighter
––
Fault history Press G and d simulta-
neously for approx .
2 seconds
Press d 74
User check (in conjunc-
tion with LON s ystem)
Press L an d d simulta-
neously for approx .
2 seconds
Press L
and d
simulta-
neously
34
Emissions test function
S
Press F and E simulta-
neously for approx .
2 seconds
Press F
and E
simulta-
neously
–
Coding level 1
Plain tex t display
Press K an d L simulta-
neously for approx .
2 seconds
Press K
and L
simulta-
neously
40
Coding level 2
Numerical display
Press L an d G simulta-
neously for approx .
2 seconds
Press L
and G
simulta-
neously
43
Service level summary
64
Service scans
5692 537 GB