Checking The Temperature Sensors - Viessmann EM-S1 Installation And Service Instructions For Contractors

Troubleshooting
Repairs
(cont.)

Checking the temperature sensors

jF jF [{] [{] [{] [{{]
% &
Fig. 9
100
10
1
0.1
0 20 25 40
Temperature in °C
Fig. 10
Collector temperature sensor
A
NTC 20 k )
Ω
B Cylinder temperature sensor
NTC 10 k )
Ω
16
1. Disconnect the plug of the relevant temperature
2. Compare the sensor resistance with the curve (see
3. In the event of severe deviation, replace the sen-
B
60 80 100
(sensor type:
&
% (sensor type:
sensor from the extension. Check the sensor
resistance.
the following diagram).
sor.
A
120 140