Checking Outputs (Relay Test) - Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual

Service scans

Checking outputs (relay test)

Vitotronic 200
Press the following keys:
1. K + d simultaneously for
approx. 2 s.
Subject to the actual equipment level, the following relay outputs can be con-
trolled:
Display
Base load
Full load
Int. pump ON
Heating valve
Valve central pos.
DHW valve
Heating circuit p. M2 ON
Mixer CLOSE
Mixer OPEN
Output int. ON
Heating circuit p. A1 ON
Cylinder pump ON
DHW circ. pump ON
Central fault ON
Vitosolic 100
The solar circuit pump can be started with the relay test at the Vitosolic 100.
Note
Terminate the relay test after completing the test (see below).
1. Select "MM" with a/b.
Confirm with d. The following
flashes:
88
2. a/b
3. d
Explanation
Burner modulation lower output
Burner modulation upper output
Int. pump/output 20 ON
Diverter valve set to heating mode
Diverter valve in central position (filling)
Diverter valve set to DHW mode
Mixer extension
Mixer extension
Mixer extension
Output sK
Internal extension
Ext. Extension H1
Ext. Extension H1
Ext. Extension H1
Ext. Extension H1
2. Select "1" with a/b.
Confirm with d.
Note
Now the solar circulation pump
operates continuously.
for the required relay out-
put.
Relay test is completed.