Viessmann GC1 - Service Scans, Vitotronic; Fault Codes

Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service
5793 309 - 05
100
Fault Codes
Troubleshooting, Vitotronic 100
Displayed fault
code
System characteristics Cause Measures
0F Control mode. Service “0F” is only
displayed in the fault
history.
Service the appliance.
Note: After the service, set
code “24:0” in group 2
“Boiler”.
30 The burner is started and stopped via a
adjustable high limit.
Short circuit, boiler water
temperature sensor
Check the boiler water
temperature sensor
(see page 158).
38 The burner is started and stopped via a
adjustable high limit.
Lead break, boiler water
temperature sensor
Check the boiler water
temperature sensor
(see page 158).
60 Boiler with maximum temperature, no
output reduction, mixing valve return
temperature control “Open”.
Short circuit, temperature
sensor aJA
Check temperature sensor
(see page 158).
68 Boiler with maximum temperature, no
output reduction, mixing valve return
temperature control “Open”.
Lead break, temperature
sensor aJA
Check temperature sensor
(see page 158).
Without temperature sensor:
Set code “4A:0” in group 1
“General”.
70 Shunt pump constantly “ON”. Short circuit, temperature
sensor aJB
Check temperature sensor
(see page 158).
78 Shunt pump constantly “ON”. Lead break, temperature
sensor aJB
Check temperature sensor
(see page 158).
Without temperature sensor:
Set code “4b:0” in group 1
“General”.
A0 Boiler cools down. Fault, safety equipment
at “X7” of plug-in
adaptor 2 for external
safety equipment
Check safety equipment and
reset if required.
A1 Boiler cools down. Fault, safety equipment
at “X3” of plug-in
adaptor 2 for external
safety equipment
Check safety equipment and
reset if required.
A2 Boiler cools down. Fault, safety equipment
at “X2” of plug-in
adaptor 2 for external
safety equipment
Check safety equipment and
reset if required.