Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual page 103

Compact energy tower with a gas fired condensing boiler as compact model; natural gas and lpg version
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Repairs
(cont.)
S1 Collector temperature sensor
S2 Temperature sensor S2
S3 Temperature sensor S3
2. Disconnect the respective sensor.
3. Check the sensor resistance and
compare it with the curve.
4. Replace the sensor in case of
severe deviation.
Troubleshooting
103

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Troubleshooting

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