Viessmann Vitocrossal 300 Service Instructions For Contractors page 53

Further details regarding the individual steps
Boiler control unit
LON
Subscriber 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 subscriber fault
monitoring
Code "9C:20"
Carrying out a LON subscriber check
Communication with the system devices connected to the fault manager is tested
with a subscriber check.
Preconditions:
■ The control unit must be programmed
as fault manager (code "79:1")
■ The LON subscriber number must be
programmed in all control units (see
page 53)
■ The LON subscriber list in the fault
manager must be up to date (see
page 53)
Carrying out a subscriber check:
1. Press OK and å simultaneously
for approx. 4 s.
Commissioning, inspection, maintenance
Vitotronic 200-H
LON
Subscriber no. 10
Code "77:10"
Control unit is not
fault manager
Code "79:0"
The control unit
receives the time
Set code "81:3"
The control unit
receives the outside
temperature
Set code "97:1"
LON subscriber fault
monitoring
Code "9C:20"
(cont.)
Vitotronic 200-H
LON
Subscriber 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"
The control unit
receives the outside
temperature
Set code "97:1"
LON subscriber fault
monitoring
Code "9C:20"
2. "Service functions"
3. "Subscriber check"
Vitocom
Subscriber no.
99
Device is fault
manager
Device
receives the
time
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53