Viessmann VITODENS 200-W Installation And Service Instructions Manual page 115

Fault codes
(cont.)
Dis- Const.
played
fault
code
98 X
99 X
9A X
9b X
9C X
9E X
9F X
A3
Weath.- System char-
comp. acteristics
X Control mode
X Control mode
X No solar DHW
heating
X Control mode
X No solar DHW
heating
X Control mode
X Control mode
X Burner blocked Flue gas tem-
Troubleshooting
Cause Measures
Lead break, Check sensor /
temperature
on solar control
sensor /
module.
Lead break, Check sensor aÖ
temperature on the solar control
sensor aÖ
module.
Lead break, Check temperature
collector tem- sensor & on the
perature sen- solar control mod-
sor ule or sensor on
the Vitosolic.
Lead break, Check temperature
temperature sensor at connec-
sensor tion S3 on the
Vitosolic 100.
Lead break, Check temperature
cylinder tem- sensor % on solar
perature sen-
control module or
sor
sensor on the
Vitosolic.
No flow rate Check solar circuit
in collector pump and solar cir-
circuit or flow cuit. Acknowledge
rate too low, fault message.
or tempera-
ture limiter
has respon-
ded
Solar control Replace solar con-
module or trol module or
Vitosolic faul- Vitosolic
ty
Install flue gas tem-
perature sen- perature sensor
sor not posi- correctly (see
tioned cor- page 134).
rectly.
115