Can the thermostat display the time correctly if there is no WLAN connection? - User Guide - RDS120 - RDS120.B

If there is no WLAN connection, the thermostat displays the time correctly only when:

• The thermostat connected to a WLAN network once and could display time correctly.
• The thermostat hasn't been powered off for more than three minutes.

Lacking either of the above conditions may result in incorrect time display.