98
Cause
Measure
LON subscriber fault
■
Check LON communication module and replace if re-
quired.
■
Check the LON subscribers.
■
Check the LON parameters.
■
Update the LON subscriber list.
Faults without a fault display
■
Display off
■
System cold
Cause
Measure
Fuse F2 has tripped.
■
Check the power consumption.
■
Check the pump and pump connections.
■
Replace fuse F2: See connection and wiring diagram
Checking temperature sensors
Boiler, cylinder, flow and buffer temperature sensors; temperature sensor for low loss header;
return temperature sensor (Therm-Control sensor)
Note
The return temperature sensor can be used as a con-
tact or immersion temperature sensor.
Viessmann NTC 10 k
Ω
(blue ID label)
10
1
10
30
50
70
90
110
Temperature in °C
0.4
0.6
0.8
2
4
6
8
20
Resistance
in kΩ
Fig. 35
1.
Pull out corresponding plug.
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.
Flue gas temperature sensor
When a specified limit is reached (see parameter "1F"
in the
"Boiler"
group), a service display appears.
Troubleshooting
Fault messages
(cont.)
5863679
Diagnosis
Summary of Contents for Vitotronic 11 CC1E
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