Viessmann VITODENS 300 WB3A, Service Instructions Manual

Page: 79 / 148

Function Key combination Exit Page
Temperatures, boiler cod-
ing card and brief scans Press
K
and
G
simulta-
neously for approx.
2 seconds
Press
d
64
Relay test Press
K
and
d
simulta-
neously for approx.
2 seconds
Press
d
68
Max. output (heating
mode) Press
K
and
F
simulta-
neously for approx.
2 seconds
Press
d
16
Operating condition Press
c
Press
c
70
Maintenance scan
c
(if "Maintenance"
flashes)
Press
d –
Adjusting the display con-
trast Press
d
and
b
simulta-
neously; display darkens
– –
Press
d
and
a
simulta-
neously; display becomes
lighter
– –
Fault history Press
G
and
d
simulta-
neously for approx.
2 seconds
– –
User check (in conjunc-
tion with LON system) Press
L
and
d
simulta-
neously for approx.
2 seconds
– –
Emissions test function
S
Press
F
and
E
simulta-
neously for approx.
2 seconds
Press
F
and
E
simulta-
neously
–
Coding level 1
Plain text display Press
K
and
L
simulta-
neously for approx.
2 seconds
Press
K
and
L
simulta-
neously
38
Coding level 2
Numerical display Press
L
and
G
simulta-
neously for approx.
2 seconds
Press
L
and
G
simulta-
neously
42
Max. output in heating
mode Press
K
and
F
simulta-
neously for approx.
2 seconds
Press
K
and
F
simulta-
neously
16
Service level summary
63
Service scans
56
92
550
GB