Daikin EKWCTRDI1V3, User Reference Manual

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Comfort and protection functions
Temporarily deactivate mode
The restricted mode can be temporarily deactivated to use or
activate disabled functions of the device during this time. After
a voltage interruption of the device, the restricted mode is
reactivated.
 De-energise the device.
 Hold down the dial and apply voltage again until the software
version is shown on the display and disappears again.
 The device is temporarily in standard operation until the next
power interruption occurs.
5.2 Protection functions
The room thermostat is equipped with protection functions for
avoiding damage to the overall installation.
5.2.1 Valve protection function
In periods without valve activation (e. g. outside the heating
period), all valves are opened cyclically. This avoids a clogging
of the valves (parameters 190 and 191).
5.2.2 Antifreeze protection
Independent from the operating mode, the room thermostat
is equipped with an antifreeze function (parameter 161).
When the temperature falls below the antifreeze protection
temperature, all connected actuators are activated and the
valves are opened.