14
Faults during activation
The symbol flashes.
Displayed
fault code
Cause of fault
Measure
H01
WiFi module is activated but no
connection could be establish-
ed to WiFi and the Viessmann
server within 5 minutes.
Activate access point mode –
see next chapter. Start configu-
ration via the Viessmann app.
H02
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.
Check the settings on the WiFi
router of the system user.
H03
Internal error
Activating access point mode
Press the following buttons:
1.
Press
MODE
and simultaneously
and hold for at least 5 seconds until
the following display appears:
2.
Press
MODE
within 5 seconds until
the following display appears:
3.
until
P06
is displayed.
4. OK
to confirm
Troubleshooting
5838175
