REMEHA iSense Bedienungsanleitung Seite 70

F216: No connection with base station (iSense RF only)
Fault indication
Display text
Solution
Fault code F216
and are lit up.
Wireless communication fault.
Check whether the iBase for the boiler is on and is functioning correctly
(consult the transmitter manual if necessary).
If there is no connection between the iSense and iBase,
then restore the connection as follows: Put the iBase in connection mode.
Consult the iBase manual for this.
On the iSense select Menu > Settings > Users > Connection.
If this does not solve the problem, look for another location for the iSense
and/or iBase or remove "obstacles" that could interfere with the RF signal.
EN
T001008a-06-A
70