Technical data

115
Troubleshooting – Vitotronic 100, GC1
Faults displayed at the programming unit (continued)
Fault
code
System characteristics
Cause Remedy
b
bb
b8
88
8
Control mode Flue gas temperature sensor open
circuit
Check flue gas temperature sensor
b
bb
bf
ff
f
Incorrect LON communication
module
Replace communication module
(see page 136)
c
cc
c1
11
1
Boiler cools down External safety device Check connection on plug aBÖ and
external safety equipment
c
cc
c4
44
4
Control mode Input Module
0 to 10V incorrectly connected
Connect Input Module 0 to 10 V to
Vitocontrol-S, VD2/CT3 and set
coding 9d: 0 on Vitotronic 100
c
cc
c8
88
8
Boiler cools down Error
Low water cut off device
Check water level of system; reset
low water cut-off device
(see page 43)
c
cc
c9
99
9
Error
Maximum pressure limiter
Check system pressure; reset
maximum pressure limiter
c
cc
ca
aa
a
Boiler cools down Error
Minimum or maximum pressure
limiter 2
Check system pressure; reset
minimum or maximum pressure
limiter
c
cc
cb
bb
b
Boiler cools down Error
External fixed high limit or
temperature limiter
Check system temperature; reset
fixed high limit (see page 34)
c
cc
ce
ee
e
Control mode Communication error
Plug-in adaptor for external safety
equipment
Check plug-in adaptor for external
safety equipment and connecting
cable
Without plug-in adaptor:
Set coding 94: 0
c
cc
cf
ff
f
Error
LON communication module
Replace communication module
(see page 136)
d
dd
d1
11
1
Boiler cools down Burner fault Check burner
d
dd
d4
44
4
Fixed high limit has responded or
fuse F2 has blown
Check fixed high limit or burner,
burner loop and fuse F2
(see page 34)
d
dd
d6
66
6
Control mode Fault in plug-in adaptor for external
safety equipment:
To DE1
Check electrical connections on DE1
to DE3
d
dd
d7
77
7
To DE2
d
dd
d8
88
8
To DE3
5351 340 v1.4