Matching The Control Unit To The Heating System; Scanning And Resetting The "Service" Display - Viessmann Vitodens 222-F Installation Instructions For Contractors

Commissioning, inspection, maintenance
Checking the combustion quality
Selecting higher/lower heating output
Service menu
1. Press OK and simultaneously for approx. 4 s.
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2. Select " " with and confirm with OK.
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The display shows "I" and "ON" flashes.
3. Selecting the lower heating output:
press OK, "ON" will be displayed constantly.

Matching the control unit to the heating system

The control unit must be matched to the system equip-
ment level.
■ To do this, select the relevant system scheme (see
the following diagrams).
■ Set the codes according to the accessories fitted:
accessories installation and service instruc-
tions

Scanning and resetting the "Service" display

The red fault indicator flashes when the limits set in
coding address "21" and "23" have been reached.
(Coding address in Group 2)
Display
The specified hours run or the specified time interval
with calendar symbol "
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Acknowledging a service
Press OK.
Service the appliance.
44
" (subject to setting) and "
(cont.)
4. Selecting the upper heating output:
press .
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5. Select "2" with
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6. Press OK, "ON" will be displayed constantly.
7. Ending output selection:
press .
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Note
Various system components are recognised automati-
cally by the control unit and the relevant codes are set
automatically.
For individual coding steps, see page 46.
Note
An acknowledged service message that has not been
reset reappears after 7 days.
After maintenance has been carried out, reset the
codes
" Reset code "24:1" in group 2 to "24:0".
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Note
The selected service parameters for hours run and
time interval restart at "0".
, "ON" flashes.