93
Checking sensors
Sensor
Capturing el-
ement
Connection/instal-
lation position
■ Outside temperature sensor (F0)
■ Flow temperature sensor, heating circuit M2/
HC2 (F12)
■ Cooling circuit flow temperature sensor (di-
rect heating circuit A1/HC1 or separate cool-
ing circuit SKK) (F14)
■ Room temperature sensors
Ni 500
See controller and
sensor PCB (see
page 64)
■ Buffer temperature sensor (F4)
■ Cylinder temperature sensor (F6)
■ Flow/return temperature sensor, secondary
circuit (F8/F9)
■ System flow temperature sensor (F13)
■ Boiler water temperature sensor, external
heat source (F20)
Pt 500
All sensors in the heat pump refrigerant cir-
cuit
See page 90
Temperature sensors type Ni 500
400
-40 -20
0
Resistance in
Temperature in °C
440
480
520
560
600
20 40 60
640
Temperature sensors, type Pt 500
460
20
540
100
Resistance in
Temperature in °C
60
140 180
620
700
780
860
-20
Troubleshooting
Repairs
(cont.)
5772 458 GB
Service