Checking Outputs (Relay Test) - Viessmann VITODENS 200-W Service Instructions Manual

Service scans
Temperatures, boiler coding card and brief...
Brief scan
c 0
d 0

Checking outputs (relay test)

Weather-compensated 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
Base load
Full load
Intern.pump On
Htg. system valve
Valve in middle pos.
DHW valve
Htg.cir.pump M2 On
Mix.valve open
Mix.valve closed
Intern.output On
Htg.cir.pump A1 On
DHW pump On
Recirc.pump On
Centr.fault ind.On
60
Display
Version
Appliance
0 0
2. a/b
3. d
Explanation
Burner modulation base load
Burner modulation full load
Int. output 20
Diverter valve set to heating mode
Diverter valve in central position (filling/draining)
Diverter valve set to DHW mode
Mixer extension
Mixer extension
Mixer extension
Output sK internal extension
External extension H1
External extension H1
External extension H1
External extension H1
(cont.)
Version
Burner control unit
Variable Software
speed version
pump Variable
0 w/o speed pump
1 Wilo 0: no varia-
2 Grundfos ble speed
pump
for the required relay out-
put.
Relay test is completed.