Checking Sensors; Checking Relays (Actuators) - Viessmann VITOSOLIC 200 Installation And Service Instructions Manual

Troubleshooting

Checking sensors

1000
100
10
1
0.1
-20 0
Temperature in °C
A Resistance 20 kΩ
(sensor S1, S9, collector tempera-
ture sensor)
1. Disconnect the respective sensor
and measure its resistance.
Specification
Sensor NTC
Protection
Permissible ambient
temperature
■ during operation
■ during storage and
transport

Checking relays (actuators)

See chapter "Relay test" on page 84.
92
20 25 40
10 kΩ at 25 °C
IP 53
−20 to + 90 °C
−20 to + 70 °C
B
60 80 100
B Resistance 10 kΩ
(sensors S2 to S8, S10 to S12)
2. Compare the measurement with the
actual temperature (for scanning see
page 85). Check the installation and,
in case of severe deviation, replace
the sensor.
20 kΩ at 25 °C
IP 53
−20 to + 200 °C
−20 to + 70 °C
A
120 140