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"Software update error"
Cause Remedy
No WiFi connection Check the network settings during WiFi commission-
ing.
Check that your Viessmann appliance is connected to
the WiFi.
WiFi signal strength insufficient Check the WiFi signal strength in the "Device info"
menu of your Vitotrol 300-E: See page 48.
If necessary, move the Vitotrol 300-E to a different in-
stallation location: See page 12.
Use a WiFi repeater if necessary.
WiFi connection established but no internet connection. Check the internet connection with other subscribers,
e.g. a laptop. If no internet connection is possible
even with another subscriber, have the network set-
tings checked by an IT expert.
Restart the Vitotrol 300-E: See page 53.
"Standby mode" is displayed
"Standby mode"
Cause Remedy
The Viessmann appliance is in standby mode.
The system is not providing room heating/cooling.
No action required.
The Viessmann appliance automatically switches to
standby mode once the outside temperature is
above the set room temperature (only with weather-
compensated control units).
Select a different operating program to terminate
standby mode.
"No heating/cooling circuits assigned to this Vitotrol 300-E" is displayed.
"The Vitotrol 300-E has not been assigned to any heating/cooling circuits."
Cause Remedy
The Vitotrol 300-E has not been assigned to any
heating circuit during commissioning of the
Viessmann appliance.
Or
The wrong appliance ID was assigned to the heating/
cooling circuit.
Consult your contractor.
Faults on the Viessmann appliance
In the event of faults on the Viessmann appliance or
the ventilation unit, a fault code e.g. "F.160" is addition-
ally displayed.
Find out about possible troubleshooting measures on
your Viessmann appliance and notify your heating con-
tractor.
Operating instructions for the Viessmann appli-
ance
What to do if...
Software update has failed
5839615
Diagnosis
52


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Viessmann Vitotrol 300-E User Manual - German - 64 pages

Viessmann Vitotrol 300-E User Manual - Dutch - 64 pages


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