Viessmann Vitotronic 100 Installation And Service Instructions Manual page 48
Electronic boiler control unit
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Also See for Vitotronic 100:
- Installation and service instructions manual (168 pages) ,
- Operating instructions manual (64 pages) ,
- Operating instructions for the system user (57 pages)
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Troubleshooting
Fault display
(cont.)
Displayed fault
System characteristics
code
30
With DHW cylinder:
■
Circulation pump for cylin-
der heating ON, boiler is
maintained at set cylinder
temperature.
Without DHW cylinder:
■
Boiler is regulated by the
temperature controller.
38
With DHW cylinder:
■
Circulation pump for cylin-
der heating ON, boiler is
maintained at set cylinder
temperature.
Without DHW cylinder:
■
Boiler is regulated by the
temperature controller.
50
Circulation pump for cylinder
heating ON:
Set cylinder temperature =
set boiler water temperature;
priority control is cancelled.
52
No heating of heating water
buffer cylinder
58
Circulation pump for cylinder
heating ON:
Set cylinder temperature =
set boiler water temperature;
priority control is cancelled.
5A
No heating of heating water
buffer cylinder
90
Control mode
91
Control mode
92
No solar DHW heating
93
Control mode
48
Cause
Short circuit, boiler water
temperature sensor
Lead break, boiler water
temperature sensor
Short circuit, cylinder tem-
perature sensor
Short circuit, buffer tem-
perature sensor
Lead break, cylinder tem-
perature sensor
Lead break, buffer tem-
perature sensor
Short circuit, temperature
sensor
/
,
connection at the solar
control module, type SM1.
Short circuit, temperature
sensor
,
aÖ
connection at the solar
control module, type SM1.
Short circuit, collector
temperature sensor,
connection of temperature
sensor
at the solar
&
control module, type SM1
or sensor at S1 of the
Vitosolic.
Short circuit, temperature
sensor,
connection at S3 of the
Vitosolic.
Measures
Check boiler water temperature
sensor (see page 51)
Check the boiler water temperature
sensor (see page 51).
Check cylinder temperature sensor
(see page 51).
Check buffer temperature sensor
(see page 51).
Check cylinder temperature sensor
(see page 51).
Check buffer temperature sensor
(see page 51).
Without buffer temperature sensor:
Set code "52:0" in group 1 "Gener-
al".
Check temperature sensor
separate installation and service
instructions).
Check temperature sensor
separate installation and service
instructions).
Check sensor at the solar control
unit (see separate installation and
service instructions).
Check sensor at the solar control
unit (see separate installation and
service instructions).
/
(see
aÖ
(see
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