Viessmann VITOPEND 200 - Fault Codes

Fault
code
on the
display
Const. Weath.-
comp.
System char-
acteristics
Cause Measures
28 X X Regulates
without flow
temperature
sensor (low
loss header)
System flow
temperature
sensor lead
broken
Check the low
loss header sen-
sor (see page 90)
30 X X Burner
blocked
Boiler water
temperature
sensor
shorted out
Check the boiler
water tempera-
ture sensor (see
page 90)
38 X X Burner
blocked
Boiler water
temperature
sensor lead
broken
Check the boiler
water tempera-
ture sensor (see
page 90)
40 X Mixer closes Heating cir-
cuit with
mixer M2
flow tem-
perature
sensor
shorted out
Check flow tem-
perature sensor
48 X Mixer closes Heating cir-
cuit with
mixer M2
flow tem-
perature
sensor lead
broken
Check flow tem-
perature sensor
50 X X No DHW heat-
ing
Comfort sen-
sor shorted
out
Check sensor
(see page 90)
51 X X No DHW heat-
ing
Outlet tem-
perature
sensor
shorted out
Check sensor
(see page 90)
58 X X No DHW heat-
ing
Comfort sen-
sor lead bro-
ken
Check sensor
(see page 90)
Fault codes (cont.)
81
Troubleshooting
5862 831 GB
Service