Viessmann Vitodens 200 Service Manual page 76

Troubleshooting
Checking and acknowledging faults
Fault code Const.
in the dis-
play
30 X
38 X
40
48
50 X
58 X
51 X
59 X
92 X
9A X
93 X
9B X
94 X
76
Weat- System
h. character-
comp. istics
X Burner
blocked
X
X Mixer
closes
X
X No DHW
heating
X
X No DHW
heating
X
X Control
mode
X
X Control
mode
X
X Control
mode
(cont.)
Cause Remedy
Boiler temperature Check the
sensor shorted out boiler tem-
perature sen-
sor (see
page 86)
Boiler temperature
sensor lead break
Heating circuit M2 Check the
flow temperature flow tempera-
sensor shorted out ture sensor
Heating circuit M2
flow temperature
sensor lead break
Cylinder tempera- Check sen-
ture sensor/comfort sors (see
sensor/loading page 86)
sensor shorted out
Cylinder tempera-
ture sensor/comfort
sensor/loading
sensor lead break
Cylinder tempera- Check sen-
ture sensor 2/outlet sors (see
sensor shorted out page 86)
Cylinder tempera-
ture sensor 2/outlet
sensor lead break
Solar: Collector Check sensor
temperature sensor
shorted out
Collector tempera-
ture sensor lead
break
Solar: Sensor S3 Check sensor
shorted out
Sensor S3 lead
break
Solar: Cylinder Check sensor
temperature sensor
shorted out