Viessmann VITODENS 333 Service Instructions Manual page 33

Further details regarding the individual steps
Boiler control Vitotronic 050
unit
Sent time via LON Time received via
Code 7b: 1 LON
Set code 81: 3
Transmit outside Outside tempera-
temperature via ture is received via
LON LON
Set code 97: 2 Set code 97: 1
Implementing a user check (in conjunction with the LON sys-
tem)
The communication with the system devices connected to the fault manager is
tested with a user check.
Preconditions:
&
The control unit must be encoded as fault manager (code 79:1).
&
The LON user number must be encoded in all control units (see page 32).
&
The fault manager LON user list must be up to date (see page 32).
A Consecutive list number
B User number
Initial start-up, inspection, maintenance
(cont.)
Vitotronic 050
Time received via
LON
Set code 81: 3
Outside tempera-
ture is received via
LON
Set code 97: 1
1. Press L and d simultaneously
for approx. 2 seconds. User check
initiated.
2. Select the required user with a
and b.
3. Activate checking with d.
Check flashes until its completion.
The display and all key illumina-
tions of the selected user flash for
approx. 60 seconds.
&
Check OK flashes during com-
munication between both
devices.
&
Check not OK flashes if there is
no communication between both
devices. Check LON connection.
4. For checking further users, proceed
as for items 2 and 3.
Vitocom
Time received
via LON
—
33