Unit installation

57
Displayed
fault code
System characteris-
tics
Cause Measures
98 Control mode. Lead break, tem-
perature sen-
sor
/
,
connection at solar
control module.
Check temperature sen-
sor
/
(see separate
installation and service
instructions).
Check coding address
"20" in the "Solar"
group.
99 Control mode. Lead break, tem-
perature sensor
aÖ
,
connection at solar
control module.
Check temperature sen-
sor
aÖ
(see separate
installation and service
instructions).
Check coding address
"20" in the "Solar"
group.
9A No solar DHW heat-
ing.
Lead break, collec-
tor temperature
sensor,
connection of tem-
perature sensor
&
at solar control
module or sensor
at S1 of the
Vitosolic.
Check sensor at the solar
control unit (see separate
installation and service
instructions).
9b Control mode. Lead break, tem-
perature sensor,
connection to S3 of
the Vitosolic.
Check sensor at the solar
control unit (see separate
installation and service
instructions).
9C No solar DHW heat-
ing.
Lead break, cylin-
der temperature
sensor,
connection of tem-
perature sensor
%
at solar control
module or sensor
at S2 of the
Vitosolic.
Check sensor at the solar
control unit (see separate
installation and service
instructions).
Troubleshooting, Vitotronic 300-K
Fault codes
(cont.)
5601 090 GB
Service