Viessmann Vitoladens 300-C Installation And Service Instructions Manual page 81

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