Technical data

121
Troubleshooting – Vitocontrol-S, VD2/CT3/CM2
Faults displayed at the programming unit (continued)
Fault
code
System characteristics
Cause Remedy
d
dd
da
aa
a
Control mode without room
influence
Short circuit
Room temperature sensor,
System circuit A1
Check room temperature sensor and
DIP switch on Vitotrol (see page 146
and 148)
d
dd
db
bb
b
Short circuit
Room temperature sensor,
Mixing valve circuit M2
a
n
d
1
4
8
)
d
dd
dc
cc
c
Short circuit
Room temperature sensor,
Mixing valve circuit M3
d
dd
dd
dd
d
Open circuit
Room temperature sensor,
System circuit A1
d
dd
de
ee
e
Open circuit
Room temperature sensor,
Mixing valve circuit M2
d
dd
df
ff
f
Open circuit
Room temperature sensor,
Mixing valve circuit M3
Fault notifications LON Participants
Fault
code
System characteristics
Cause Remedy
0
00
01
11
1
t
o
Control mode
Particpant 12, (Vitotronic 200-H)
has a fault
Read fault code of participant.
(See instruction manual of the
applicabble control)
t
o
9
99
98
88
8
No connection to participant -Check codings
-Check LON connections
-Refresh participant list
-Carry out a participant check
9
99
99
99
9
Remote connection to Vitocom 300
active
Check external connections to
Vitocom 300
No connection to Vitocom 300 -Check codings
-Check LON connections
-Refresh participant list
-Carry out a participant check
5351 340 v1.4
Participant
1
DBG-
121