Troubleshooting; Fault Messages; Checking Sensors - Viessmann Vitosolic 100 Installation And Service Instructions Manual

Fault messages

Sensor faults:
■ Display background light flashes
■ The sensor symbol in the system
scheme flashes quickly
■ ¨ flashes
Example - collector temperature sen-
sor short circuit

Checking sensors

100
10
1
0.1
0 20 25
Temperature in °C
A Resistor 20 kΩ (sensor S1, collector
temperature sensor)
1. Disconnect the relevant sensor and
measure its resistance.
KOL
°C
40 60 80
Possible displays:
–88.8 Sensor short circuit
888.8 Sensor lead break
Note
Further information can be called up with
keys / .
B
100 120
B Resistance 10 kΩ (sensors S2 and
S3)
2. Compare the measurement with the
actual temperature (for scanning see
page 24). In the case of severe devi-
ation, check the installation and
replace the sensor if required.

Troubleshooting

A
140
25