Scanning Operating Conditions And Sensors - Viessmann VITODENS 333-F WS3A Service Instructions Manual

Service scans
Checking outputs (relay test)
Constant temperature control unit
Press the following keys:
1. K + d simultaneously for
approx. 2 s.
The following relay outputs can be controlled subject to system design:
Display screen
1
2
3
4
5
6
10
11
12
14

Scanning operating conditions and sensors

Weather-compensated control unit
Press the following keys:
1. c "Select heating circuit" is
displayed.
2. d to confirm; wait approx.
4 s.
The following operating conditions can be scanned, subject to the actual
system equipment level for heating circuit A1 and heating circuit with
mixer M2:
Display screen
Participant no.
Holiday program
Departure date
68
(cont.)
2. a/b
3. d
Explanation
Burner modulation base load
Burner modulation full load
Internal pump / output 20 "ON"
Diverter valve set to heating mode
Diverter valve in central position (filling/draining)
Diverter valve set to DHW mode
Output sK internal extension
Heating circuit pump A1 External extension H1
Cylinder primary pump External extension H1
Central fault message External extension H1
3. c
4. a/b for the required operating
5. d
Explanation
Programmed subscriber no. in the LON system
If a holiday program has been entered
Date
for the required relay out-
put.
Relay test is completed.
press again.
condition.
Scanning is completed.