Viessmann Vitocrossal 300 Service Manual page 49

Vitocrossal 300 CU3A 26 to 57 Service
Connecting the Boiler to a LON System
Boiler control unit
Participant no. 1
Code "77:1"
Control unit is fault manager
Code "79:1"
Control unit transmits the
time
Code "7B:1"
Control unit transmits
outside temperature
Set code "97:2"
LON participant fault
monitoring
Code "9C:20"
Carrying out a LON participant check
Communication with the system devices connected
to the fault manager is tested with a participant check.
Preconditions:
The control unit must be programmed as fault manager

(code "79:1")
The LON participant number must be programmed

in all control units
The LON participant list in the fault manager must

be up to date
Vitotronic 200-H
(e.g. HK1B *1 mixing valve
control)
Participant no. 10
Code "77:10"
Control unit is not fault
manager
Code "79:0"
The control unit receives
the time
Set code "81:3"
Control unit receives outside
temperature
Set code "97:1"
LON participant fault
monitoring
Code "9C:20"
(continued)
Vitotronic 200-H
(e.g. HK1B *1 multiple
mixing valve control)
Participant no. 11
Set code "77:11"
Control unit is not fault
manager
Code "79:0"
The control unit receives the
time
Set code "81:3"
Control unit receives outside
temperature
Set code "97:1"
LON participant fault
monitoring
Code "9C:20"
1. Press OK and å simultaneously for approx. 4 sec.
2. "Service functions"
3. "Participant check"
4. Select participant (e.g. participant 10).
The participant check for the selected participant is
introduced.
Successfully tested participants are designated

with "OK".
Unsuccessfully tested participants are designated

with "Not OK".
Note: To carry out a new participant check, create a new
participant list with menu item "Delete list?"
Note: If the participant check is carried out by another
control unit, the participant number and "Wink"
are shown on the display for approx. 1 min.
Service
Vitocom
*1 LON communication
module
Participant no. 99
Device is fault manager
Device receives the time
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