99
Viessmann NTC 20 k
Ω
(orange ID label)
80
120
160
200
Temperature in °C
40
0.1
1
10
Resistance
in kΩ
0
40
20
20
60
100
140
180
Fig. 36
1.
Pull out plug
aG
.
2.
Check the sensor resistance and compare it to the
curve.
3.
In the case of severe deviation, check sensor
installation and replace the sensor if required.
Checking the fuses
1.
Isolate the system from the power supply, e.g. by
removing the separate fuse or by means of a
mains isolator, and check that it is no longer live.
Safeguard the system against reconnection.
2.
Open the control unit.
3.
Check the fuses. Replace if necessary (see con-
nection and wiring diagram).
Danger
Using the wrong fuses or inserting them
incorrectly can lead to an increased risk of
fire.
■
Do not use force to insert the fuses. Posi-
tion the fuses correctly.
■
Only use structurally identical types with
the stated response characteristics.
Troubleshooting
Checking temperature sensors
(cont.)
5863679
Diagnosis
Summary of Contents for Vitotronic 11 CC1E
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