49
Coding in the delivered condition
Possible change
87:
Never adjust.
88:0
Temperature displayed in °C (Cel-
sius)
88:1
Temperature displayed in °F (Fah-
renheit)
8A:175
Never adjust
8F:0
All controls active
Note
The relevant code is only activated
when you exit the service menu.
8F:1
All controls disabled
Operation blocked in standard menu
and
in extended menu, emissions
test mode can be activated.
8F:2
Only standard settings can be con-
trolled. Operation enabled in stand-
ard menu but blocked in extended
menu, emissions test mode can be
activated.
90:128
Time constant for calculating ad-
justed outside temperature 21.3 h
(only for weather-compensated
control units)
90:1
to
90:199
Subject to the set value, the flow
temperature is adjusted quickly (low-
er values) or slowly (higher values)
when the outside temperature
changes.
1 step
≙
10 min
94:0
Never adjust.
95:0
Never adjust.
97:0
With LON communication module:
The outside temperature of the
sensor connected to the control
unit is used internally.
97:1
Control unit receives outside tem-
perature.
97:2
The control unit transmits the out-
side temperature to the LON sub-
scribers.
98:1
Viessmann system number (in
conjunction with monitoring of sev-
eral systems via Vitocom 300)
98:1
to
98:5
System no. adjustable from 1 to 5
99:0
Never adjust.
9A:0
Never adjust.
9B:70
Set flow temperature for external
demand 70 °C
9B:0
to
9B:127
Set flow temperature for external de-
mand adjustable from 0 to 127 °C
(limited by boiler-specific parame-
ters)
9C:20
Monitoring LON subscribers.
If there is no response from a sub-
scriber for 20 min, the values
specified in the control unit are
used. Only then will a fault mes-
sage be issued.
9C:0
No monitoring
9C:5
to
9C:60
Time adjustable from 5 to 60 min
9F:8
Differential temperature 8 K, only
in conjunction with heating circuit
with mixer
9F:0
to
9F:40
Differential temperature adjustable
from 0 to 40 K
Code 2
General/Group "1"
(cont.)
5839829
Codes
