Vemer Chronos Key - Backlight Management

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CHRONOS KEY Programmable Thermostat User Manual
BACKLIGHT MANAGEMENT
The programmable thermostats of the Chronos Key series have a LED backlit display
with led. There are some differences between battery powered models and mains
powered models.
Chronos Key battery models
In battery-powered models the backlighting display is normally OFF and it is actived
(blue color) just pressing a key or after the programming menu.
Chronos Key models 230 Vac
In the 230 Vac power supplied models the display backlighting is normally ON.
Backlighting switching OFF
If not desired the backlighting function can be disabled (for example in
bedrooms). Then the thermostat continues its normal operation and the the
backlighting is actived just pressing a key or after the programming menu.
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