Service Level Overview - Viessmann VITODENS 333-F WS3A Service Instructions Manual

Service level overview

Function
Temperatures, boiler cod-
ing card, brief scans
Relay test
Max. output (heating
mode)
Operating conditions and
sensors
Service scan
Adjusting the display con-
trast
Calling up acknowledged
fault messages
Fault history
Subscriber check (in con-
junction with LON sys-
tem)
Emissions test function
"S"
Coding level 1
Coding level 2
Resetting codes to the
delivered condition
Key combination
K and G approx. 2 s si-
multaneously
K and d approx. 2 s si-
multaneously
K and F approx. 2 s si-
multaneously
Press c
c (if "Service" flashes)
d and a simultaneously;
the display darkens
d and b simultaneously;
the display becomes light-
er
d for approx. 3 s
G and d approx. 2 s si-
multaneously
L and d approx. 2 s si-
multaneously
Weather-compensated
control unit:
F and E approx. 2 s si-
multaneously
Constant temperature con-
trol unit:
O and F approx. 2 s si-
multaneously
K and L approx. 2 s si-
multaneously
L and G approx. 2 s si-
multaneously
L and G simultaneously
for approx. 2 s; then e
Service scans
Exit Page
Press d 64
Press d 67
Press d 16
Press d 68
Press d 38
72
Press d 73
L and d 37
simulta-
neously
F and E
or O and
F simulta-
neously for
approx. 1 s,
alternatively
automatic
after 30 min
K and L 41
approx. 1 s
simulta-
neously
L and G 43
approx. 1 s
simulta-
neously
62
63