Viessmann Vitodens 200 Start-Up/Service Instructions page 40

Troubleshooting
Correction
(continued)
Function
Three-way valve drive (DHW cyl.)
Heating circuit pump with extension kit for
a heating circuit with mixer
Burner start with upper rated output and
heating circuit pump ON
40
Relay test (standard programming unit)
1. Set the heating program selector switch to "T".
2. Select the required position using rotary selector "s".
Rotary selector "s"
N
-1
-2
+1
+2
-4
-3
-5
-6
3. Return the heating program selector and rotary
selector "s" to their original positions.
Vitodens 200 WB2 Service
Flashing display
U:0: 4
U:0: 2
U:0: 3
U:0: 8
U:0: 7
U:0: d
U:0: 1
Display of boiler water temperature
Fault code display from the fault
memory (see page 26).