120
Dis-
played
fault
code
Const.
Weath.-
comp.
System char-
acteristics
Cause
Measures
99
X
X
Control mode
Lead break,
temperature
sensor
aÖ
Check sensor
aÖ
on solar control
module.
9A
X
X
No solar DHW
heating
Lead break,
collector tem-
perature sen-
sor
Check temperature
sensor
&
on solar
control module or
sensor on the
Vitosolic.
9b
X
X
Control mode
Lead break,
cylinder tem-
perature sen-
sor
Check temperature
sensor at connec-
tion S3 on the
Vitosolic.
9C
X
X
No solar DHW
heating
Lead break,
cylinder tem-
perature sen-
sor
Check temperature
sensor
%
on solar
control module or
sensor on the
Vitosolic.
9E
X
X
Control mode
No flow rate
in solar circuit
or flow rate
too low, or
temperature
limiter has re-
sponded
Check solar circuit
pump and solar cir-
cuit. Acknowledge
fault message.
9F
X
X
Control mode
Solar control
module or
Vitosolic fault
Replace solar con-
trol module or
Vitosolic
A3
X
Burner blocked Flue gas tem-
perature sen-
sor incorrect-
ly positioned
Fit flue gas temper-
ature sensor cor-
rectly (see
page 139).
Troubleshooting
Fault codes
(cont.)
5585 174 GB