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Troubleshooting
Faults during activation
The
symbol flashes.
Displayed
fault code
H01
H02
H03
Activating access point mode
Press the following buttons:
1. Press MODE and
and hold for at least 5 seconds until
the following display appears:
14
Cause of fault
WiFi module is activated but no
connection could be establish-
ed to WiFi and the Viessmann
server within 5 minutes.
No synchronisation with the
time server could be establish-
ed after more than 5 minutes.
Possible reasons:
■ No authorisation for port 123
(UDP) on the WiFi router
(firewall) of the system user
■ Name resolution (DNS) does
not work.
Internal error
simultaneously
Measure
Activate access point mode –
see next chapter. Start configu-
ration via the Viessmann app.
Check the settings on the WiFi
router of the system user.
2. Press MODE within 5 seconds until
the following display appears:
3.
until P06 is displayed.
4. OK to confirm
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