Troubleshooting
Logamatic EMS RC35 user interface - Subject to technical modifications.48
10
10 Troubleshooting
This fault table lists possible “system errors”, i.e. faults of heating system components. The heating
system keeps operating as much as possible in the event of a system error; in other words, heating
of the home can continue as long as it is safe.
Use only original Buderus parts. Losses caused by the use of parts not supplied by
Buderus are excluded from the Buderus warranty.
The faults displayed will vary depending on the specific type of boiler in use.
Abbreviations used:
SC = Service code; x = heating zone with the number x, e.g. A23 for heating zone 3
FC = Fault code
HZx = Heating zone with the number x
SC FC
Fault
message
Effect on control
characteristics Possible cause Remedy
A01 800 Outdoor
sensor
defective.
The minimum outdoor
temperature is used
instead of the actual
outdoor temperature.
Sensor incorrectly
connected or
installed.
Break or short circuit
in the sensor lead.
Temperature sensor
is defective.
B Check the sensor
connection and the
sensor lead.
B Check that the
sensor is correctly
mounted.
B Compare resistance
values with the
characteristic
sensor curve.
Tab. 21 Fault table
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