Scanning Operating Conditions And Sensors - Viessmann Vitodens 200 Service Manual

Checking outputs (relay test)
Display
1
2
3
4
5
6
10
11
12
13
14

Scanning operating conditions and sensors

Weather-compensated control unit
1. For two heating circuits – select
heating circuit:
Press a.
&
1r flashes on the display.
&
Select heating circuit A1 (heating
circuit without mixer):
Press d.
&
Select heating circuit M2 (heating
circuit with mixer):
– Press a.
– 2r flashes on the display.
– Press d.
Heating circuits A1 and M2
Operating condition display
(subject to system equip-
ment level)
User no.
Holiday program
Date of departure
Date of return
Outside temperature, ... °C
(cont.)
Description
Burner modulation - lower output
Burner modulation - upper output
Diverter valve set to heating mode
Valve in central position
Valve set to DHW mode
Internal pump / output 20 ON
Output sK - internal extension
Heating circuit pump A1 - external extension
Cylinder loading pump - external extension
DHW circulation pump - external extension
Central fault - external extension
2. Press c.
3. Select the required operating con-
dition scan with a or b.
4. Press c.
Description
Encoded user no. in the LON system
Only displayed if a holiday program has been
set up
Date
Date
Actual value
Service scans
69