81
Displayed fault
code
System characteristics
Cause
Measures
38
Burner locked out
Lead break, boiler water
temperature sensor
Check boiler water temperature
sensor (see page 85)
40
Mixer is being closed.
Short circuit, flow temper-
ature sensor for heating
circuit 2 (with mixer)
Check flow temperature sensor
(see page 89)
44
Mixer is being closed.
Short circuit, flow temper-
ature sensor for heating
circuit 3 (with mixer)
Check flow temperature sensor
(see page 89)
48
Mixer is being closed.
Lead break, flow tempera-
ture sensor for heating cir-
cuit 2 (with mixer)
Check flow temperature sensor
(see page 89)
4C
Mixer is being closed.
Lead break, flow tempera-
ture sensor for heating cir-
cuit 3 (with mixer)
Check flow temperature sensor
(see page 89)
50
No DHW heating by the boil-
er
Short circuit, cylinder tem-
perature sensor
Check sensors (see page 85)
58
No DHW heating by the boil-
er
Lead break, cylinder tem-
perature sensor
Check sensors (see page 85)
90
Control mode
Short circuit, temperature
sensor
/
Check sensor
/
on the solar con-
trol module.
91
Control mode
Short circuit, temperature
sensor
aÖ
Check sensor
aÖ
on the solar con-
trol module.
92
No solar DHW heating
Short circuit, collector
temperature sensor
Check temperature sensor
&
on
the solar control module or the
sensor on the Vitosolic.
93
Control mode
Short circuit, cylinder tem-
perature sensor
Check temperature sensor at con-
nection S3 on the Vitosolic 100.
94
No solar DHW heating
Short circuit, cylinder tem-
perature sensor
Check temperature sensor
%
on
the solar control module or the
sensor on the Vitosolic.
98
Control mode
Lead break, temperature
sensor
/
Check sensor
/
on the solar con-
trol module.
99
Control mode
Lead break, temperature
sensor
aÖ
Check sensor
aÖ
on the solar con-
trol module.
9A
No solar DHW heating
Lead break, collector tem-
perature sensor
Check temperature sensor
&
on
the solar control module or the
sensor on the Vitosolic.
9b
Control mode
Lead break, cylinder tem-
perature sensor
Check temperature sensor at con-
nection S3 on the Vitosolic 100.
9C
No solar DHW heating
Lead break, cylinder tem-
perature sensor
Check temperature sensor
%
on
the solar control module or the
sensor on the Vitosolic.
9E
Control mode
No flow rate or inadequate
flow rate in collector cir-
cuit, or temperature limiter
has responded.
Check solar circuit pump and solar
circuit. Acknowledge fault mes-
sage.
9F
Control mode
Solar control module or
Vitosolic fault
Replace solar control module or
Vitosolic.
A7
Control mode as per deliv-
ered condition
Programming unit faulty
Replace the programming unit.
Troubleshooting
Fault codes
(cont.)
6136330
Service
