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mode. Then, it becomes impossible to exceed this set point, regardless of the
current mode (Day/Night). However, it is still possible to lower the set point at
your discretion.
Procedures to activate the Security mode
1. To activate the Security option, from the Day mode adjust the day set point to the
desired maximum temperature.
2. From the Day mode, simultaneously press down the two buttons for more than 13
seconds, until the icon appears (note that the °C or °F symbol will blink after
3 seconds, but continue to keep both buttons pressed down). (For the backlit
models, note that the backlight will blink after 3 seconds and the °C or °F symbol
will appear after 8 seconds, but continue to keep both buttons pressed down).
3. Release the buttons. The thermostat is now locked.
Procedures to deactivate the Security mode
1. To deactivate the Security mode, start by cutting off the thermostat power at circuit
breaker and wait at least 20 seconds.
2. Turn the thermostat power back on and the icon will blink for a maximum of 5
minutes.
3. Simultaneously press down both buttons for 13 seconds (note that the backlight
will blink after 3 seconds and the °C or °F symbol will appear after 8 seconds, but
continue to keep both buttons pressed down). After 13 seconds, the icon will
disappear and the degrees symbol (C or F) will stop blinking, indicating that the
Security mode is deactivated. Release the buttons.
Fan mode
The activation of the Fan mode is similar to the Celsius/Fahrenheit adjustment.
To activate or deactivate the Fan mode, you must press down both buttons
simultaneously for 3 seconds while in Day mode. Once the 3 seconds have
passed, the Celsius/Fahrenheit symbol will blink. (For the backlit models, press
down both buttons for at least 3 seconds in Day mode. Note that the backlight
will blink after 3 seconds but hold down the buttons until the Celsius/Fahrenheit
