Viessmann VITOPEND 200 Installation And Service Instructions Manual page 81

Fault codes
(cont.)
Display Const. Weath.‐
fault comp.
code
30 X X
38 X X
40 X
48 X
50 X X
51 X X
58 X X
59 X X
A7 X
b1 X X
System char- Cause
acteristics
Burner Boiler water
blocked temperature
sensor
shorted out
Burner Boiler water
blocked temperature
sensor lead
broken
Mixer closes Mixer circuit
M2 flow tem-
perature
sensor
shorted out
Mixer closes Mixer circuit
M2 flow tem-
perature
sensor lead
broken
No DHW heat- Comfort sen-
ing sor shorted
out
No DHW heat- Outlet tem-
ing perature
sensor
shorted out
No DHW heat- Comfort sen-
ing sor lead bro-
ken
No DHW heat- Outlet tem-
ing perature
sensor lead
broken
Regulated op- Faulty pro-
eration as per gramming
delivered con- unit
dition
Regulated op- Communica-
eration as per tion error
delivered con- program-
dition ming unit
Troubleshooting
Remedy
Check the boiler
water tempera-
ture sensor (see
page 91)
Check the boiler
water tempera-
ture sensor (see
page 91)
Check flow tem-
perature sensor
Check flow tem-
perature sensor
Check sensors
(see page 91)
Check sensors
(see page 91)
Check sensors
(see page 91)
Check sensor
(see page 91)
Replace program-
ming unit
Check connec-
tions and replace
the programming
unit, if required
81