Buderus Logamax plus Service Manual page 28

3 Failures / Errors
Legends :
Fan
1
Flue gas temperature limiter (STB) (Recuperator)
2
Water level switch
3
Ionisation electrode
4
Pump
5
Turbine
6
LCD Dispaly connection
7
Transformer
8
Controller (room thermostat) connection
9
Diagnostic connection
10
Igniton transformer
11
Supply cable
12
DHW temperature sensor (NTC)
13
Gas valve
14
Ignition electrode
15
Temperatur limiter (STB)
16
Flow temperature sensor
17
Flue gas safety (combustion chamber) sensor
18
28 GB012 - 25K