Technical data
114
Troubleshooting – Vitotronic 100, GC1
Faults displayed at the programming unit
(continued)
Fault
code
System characteristics
Cause Remedy
0
00
0f
ff
f
Control mode Maintenance
0F is only displayed in the error
history
Carry out maintenance
Please note:
After maintenance, set
coding 24: 0.
3
33
30
00
0
Burner is started and stopped via an
adjustable high limit
Short circuit
Boiler temperature sensor
Check boiler temperature sensor
3
33
38
88
8
a
d
j
u
s
t
a
b
l
e
h
i
g
h
l
i
m
i
t
Open circuit
Boiler temperature sensor
6
66
60
00
0
Boiler with maximum temperature,
no output reduction; return control
o
p
e
n
.
Short circuit
Temperature sensor aJA
Check temperature sensor.
Set coding 4A: 0, if no sensor is
c
o
n
n
e
c
t
e
d
.
6
66
68
88
8
n
o
o
u
t
p
u
t
r
e
d
u
c
t
i
o
n
;
r
e
t
u
r
n
c
o
n
t
r
o
l
open.
Open circuit
Temperature sensor aJA
S
e
t
c
o
d
i
n
g
4
A
:
0
,
i
f
n
o
s
e
n
s
o
r
i
s
connected.
7
77
70
00
0
Shunt pump constantly ON Short circuit
Temperature sensor aJB
Check temperature sensor.
Set coding 4b: 0, if no sensor is
c
o
n
n
e
c
t
e
d
.
7
77
78
88
8
Open circuit
Temperature sensor aJB
S
e
t
c
o
d
i
n
g
4
b
:
0
,
i
f
n
o
s
e
n
s
o
r
i
s
connected.
a
aa
aa
aa
a
Control mode Therm-Control configuration error
Plug aJA of Therm-Control
temperature sensor not plugged-in
Insert plug aJA
coding 0d: 0 must be set for
Vitocrossal
a
aa
ac
cc
c
Control mode Return temperature control
configuration error:
Coding OC: 1 has been set, but
plug aJA not plugged-in
and/or coding 4E: 0 not set
Insert plug aJA and check coding
a
aa
ad
dd
d
Isolation valve configuration error:
Coding OC: 2, OC: 3 or OC: 4 set,
and
coding 4E: 1 not set
With isolation valve:
Set coding 4E: 0
Without isolation valve:
Set coding 0C: 0 or 0C: 1
b
bb
b0
00
0
Short circuit
Flue gas temperature sensor
Check flue gas temperature sensor.
b
bb
b1
11
1
Communication error –
programming unit
Check connections and replace
programming unit if necessary
b
bb
b4
44
4
Emissions test mode
Internal electronics fault Check Printed Circuit Board or
r
e
p
l
a
c
e
i
f
n
e
c
e
s
s
a
r
y
b
bb
b5
55
5
Control mode
r
e
p
l
a
c
e
i
f
n
e
c
e
s
s
a
r
y
b
bb
b6
66
6
Constant mode Invalid hardware recognised Set coding 92: 160
b
bb
b7
77
7
Boiler is regulated by adjustable
high limit
Internal error – boiler coding card Plug in boiler coding card or replace
if faulty
(see page 38)
5351 340 v1.4