Viessmann VITODENS 200-W Service Instructions Manual page 95

Fault codes
(cont.)
Dis- Const.
played
fault
code
93 X
94 X
98 X
99 X
9A X
9b X
9C X
9E X
Weath.- System char-
comp. acteristics
X Control mode
X No DHW heat-
ing
X Control mode
X Control mode
X No DHW heat-
ing
X Control mode
X No DHW heat-
ing
X Control mode
Troubleshooting
Cause Measures
Short circuit, Check temperature
cylinder tem- sensor at connec-
perature sen- tion S3 to the
sor Vitosolic 100.
Short circuit, Check temperature
cylinder tem- sensor % on the
perature sen-
solar control mod-
sor
ule or the Vitosolic
sensor
Lead break, Check sensor /
temperature on the solar control
sensor / module
Check sensor aÖ
Lead break,
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 the Vitosolic
sensor
Lead break, Check temperature
cylinder tem- sensor at connec-
perature sen- tion S3 to the
sor Vitosolic 100.
Lead break, Check temperature
cylinder tem- sensor % on the
perature sen- solar control mod-
sor ule or the Vitosolic
sensor
No flow rate Check solar circuit
in the collec- pump and solar cir-
tor circuit or cuit. Acknowledge
flow rate too fault message.
low, or tem-
perature lim-
iter has
responded
95