Service Scans; Service Level Overview - Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual

Service level overview

Function
Temperatures, boiler cod-
ing card and 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
Plain text display
Coding level 2
Numerical display
Resetting codes to their
delivered condition
Key combination
Press K and G simulta-
neously for approx. 2 s.
Press K and d simulta-
neously for approx. 2 s.
Press K and F simulta-
neously for approx. 2 s.
Press c
c (if "Service" flashes)
Press d and asimulta-
multaneously; the display
darkens
Press d and b simulta-
neously; the display be-
comes lighter
Press d for approx. 3 s
Press G and d simulta-
neously for approx. 2 s
Press L and d simulta-
neously for approx. 2 s
Press F and E simulta-
neously for approx. 2 s.
Press K and L simulta-
neously for approx. 2 s
Press L and G simulta-
neously for approx. 2 s
Press L and G simulta-
neously for approx. 2 s;
then e

Service scans

Exit Page
Press d 86
Press d 88
Press d 35
Press c 89
Press d 64
92
Press d 92
Press L 59
and d si-
multaneous-
ly
Press F
and E si-
multaneous-
ly
Press K 66
and L si-
multaneous-
ly
Press L 68
and G si-
multaneous-
ly
84
85