Viessmann Vitotronic 100 GC1 Installation And Service Instructions Manual page 96

Troubleshooting – Vitotronic 100, GC1
Faults displayed at the programming unit
Fault
System characteristics
code
0 0 0 0 f f f f Control mode
3 3 3 3 0 0 0 0
Burner is started and stopped via
a adjustable high limit a adjustable high limit
3 3 3 3 8 8 8 8
6 6 6 6 0 0 0 0
Boiler with maximum temperature,
no output reduction; return control no output reduction; return control
to to
6 6 6 6 8 8 8 8
7 7 7 7 0 0 0 0 Shunt pump constantly ON
7 7 7 7 8 8 8 8
a a a a a a a a Control mode
a a a a c c c c
Control mode
a a a a d d d d
b b b b 0 0 0 0
b b b b 1 1 1 1
b b b b 4 4 4 4 Emissions test mode
b b b b 5 5 5 5 Control mode
b b b b 6 6 6 6
Constant mode
b b b b 7 7 7 7 Boiler is regulated by adjustable
high limit
96
(cont.)
Cause
Maintenance
0F is only displayed in the error
history
Short circuit
Boiler temperature sensor
Open circuit
Boiler temperature sensor
Short circuit
Temperature sensor aJA
Open circuit
Temperature sensor aJA
Short circuit
Temperature sensor aJB
Open circuit
Temperature sensor aJB
Therm-Control configuration error
Plug aJA of Therm-Control
temperature sensor not plugged-in
Return temperature control
configuration error:
Coding OC : 1 has been set, but
plug aJA not plugged-in
and/or
coding 4E : 0 not set
Isolation valve configuration error:
Coding OC : 2, OC : 3 or OC : 4 set,
and
coding 4E : 1 not set
Short circuit
Flue gas temperature sensor
Communication error –
programming unit
Internal electronics fault
Invalid hardware recognised
Internal error – boiler coding card
Remedy
Carry out maintenance
Please note:
After maintenance, set
coding 24 : 0.
Check boiler temperature sensor
(see page 122)
Check temperature sensor
(see page 123). (see page 123).
Set coding 4A : 0, if no sensor Set coding 4A : 0, if no sensor
is connected.
Check temperature sensor
(see page 123). (see page 123).
Set coding 4b : 0, if no sensor Set coding 4b : 0, if no sensor
is connected.
Insert plug aJA
coding 0d : 0 must be set for
Vitocrossal
Insert plug aJA and check coding
With isolation valve:
Set coding 4E : 0
Without isolation valve:
Set coding 0C : 0 or 0C : 1
Check flue gas temperature sensor
(see page 124)
Check connections and replace
programming unit if necessary
Check Printed Circuit Board or
replace if necessary replace if necessary
Check the control software circuit
board and confirm the coding address:
- Enter coding 2 (see page 140
for instructions).
- Change code 8A to 176.
- Confirm coding 92:160
Plug in boiler coding card or replace
if faulty
(see page 30)