Function Key combination Exit Page
Temperatures, boiler cod-
ing card and brief scans
K and G for approx. 2 s
simultaneously
Press d 71
Relay test K and d approx. 2 s si-
multaneously
Press d 74
Max. output (heating
mode)
K and F approx. 2 s si-
multaneously
Press d 28
Operating conditions and
sensors
Press c Press d 75
Service scan c (if "Service" flashes) Press d 51
Adjusting the display con-
trast
d and a simultaneously;
the display darkens
– –
d and b simultaneously;
the display becomes light-
er
– –
Calling up acknowledged
fault messages
d for approx. 3 s 79
Fault history G and d simultaneously
for approx. 2 s
Press d 80
User check (in conjunc-
tion with LON system)
L and d approx. 2 s si-
multaneously
L and d
simulta-
neously
49
Emissions test function
"S"
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
F and E
or O and
F simulta-
neously for
approx. 1 s,
alternatively
automatic
after 30 min
–
Coding level 1 K and L simultaneously
for approx. 2 s
K and L 52
Coding level 2 L and G simultaneously
for approx. 2 s
L and G 54
Resetting codes to the
delivered condition
L and G simultaneously
for approx. 2 s; then e
– 69
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