Troubleshooting - Viessmann Vitotronic 200 Installation And Service Instructions For Contractors

Fault messages
(cont.)
Cause
Short circuit, outside temperature sensor
18 Lead break, outside temperature sensor
Regulates as if the outside temperature were 0 °C.
Cause
Lead break, outside temperature sensor
19 Wireless outside temperature sensor
Regulates as if the outside temperature were 0 °C.
Cause
Lead break/communication failure, wireless outside
temperature sensor
30 Short circuit, boiler water temperature sensor
■ With DHW cylinder:
Circulation pump for cylinder heating on, boiler is
maintained at set cylinder temperature.
Cause
Short circuit, boiler water temperature sensor
38 Lead break, boiler water temperature sensor
■ With DHW cylinder:
Circulation pump for cylinder heating on, boiler is
maintained at set cylinder temperature.
Cause
Lead break, boiler water temperature sensor
3A LAN hardware error
■ Control mode
■ Operation via app not possible
Cause
Network module error
Measure
Check outside temperature sensor: See chapter "Check
temperature sensors"
Measure
Check outside temperature sensor: See chapter "Check
temperature sensors"
Measure
Check wireless connection. Place the wireless outside
temperature sensor close to the boiler. Forget outside
temperature sensor, then pair again (see separate
documents). Replace wireless outside temperature sen-
sor.
■ Without DHW cylinder:
Boiler is regulated by the temperature controller.
Measure
Check the boiler water temperature sensor: See chap-
ter "Checking temperature sensors"
■ Without DHW cylinder:
Boiler is regulated by the temperature controller.
Measure
Check the boiler water temperature sensor: See chap-
ter "Checking temperature sensors"
Measure
Check the network module and replace if necessary.

Troubleshooting

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