Viessmann Vitodens 200 WB2C 45, Service Instructions Manual

Page: 99 / 148

99
Dis-
played
fault
code Const. Weath.-
comp. System char-
acteristics Cause Measures
98 X X Control mode Lead broken,
temperature
sensor
/
Check sensor
/
on the solar control
module
99 X X Control mode Lead broken,
temperature
sensor
aÖ
Check sensor aÖ
on the solar control
module
9A X X No DHW heat-
ing Lead break,
collector tem-
perature sen-
sor Check temperature
sensor
& on the
solar control mod-
ule or the Vitosolic
sensor
9b X X Control mode Lead break,
cylinder tem-
perature sen-
sor Check temperature
sensor at connec-
tion S3 to the
Vitosolic 100
9C X X No DHW heat-
ing Lead break,
cylinder tem-
perature sen-
sor Check temperature
sensor
% on the
solar control mod-
ule or the Vitosolic
sensor
9E X X Control mode No flow rate
in the collec-
tor circuit or
flow rate too
low, or tem-
perature lim-
iter has
responded Check solar circuit
pump and solar cir-
cuit. Acknowledge
fault message
9F X X Control mode Solar control
module or
Vitosolic
faulty Replace solar con-
trol module or
Vitosolic
A6 X X Control mode Impressed
current anode
faulty Replace
impressed current
anode
A7 X Control mode
as per deliv-
ered condition Programming
unit faulty Replace program-
ming unit
Troubleshooting
Fault codes
(cont.)
5692 843 GB