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MultiSITE CRC 2 Controller
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ACCESSORIES INSTALLATION
CO2, Temperature, and Humidity / Temperature and
Humidity Sensor Interface
The sensor is deployed by setting the interface with a push button and a multi-color
LED. Both are hidden under the sensor housing and intended for use by a trained
installer only (Figure 44).
Figure 44: Sensor Interface
Multi-color
LED
Push button hole
Push Button
The push button can be pressed through a hole from the bottom side of the sensor,
with a slim tool . Each recorded button press is signaled by 2 yellow LED flashes.
• Short push
One short push starts the commissioning procedure if the sensor is in the decommis-
sioned (energy saving / hibernation) mode. If the sensor is already commissioned, it
will enter “demo mode” for a 5-minute timeout interval.
• Long push
One long push puts the sensor into decommissioned / hibernate mode. The long
push is confirmed by one red LED flash roughly 1 second after 2 yellow LED push
signaling flashes. After a red LED signal, the button should be released in order to
prevent another unintended short push detection.
Multicolor LED
The multicolor LED is hidden under the top plastic cover, positioned on left (Figure
44). In normal state the LED is off in order to conserve battery life. It is only used to
signal the following special events: The LED flashes are 1/2 second.
• 2 YELLOW ashes conrm each button push taken into account by the sensor.
• 1 RED ash acknowledges a long push. The decommissioning procedure and a
sensor reset will be executed, then the sensor will enter hibernation mode.
• 3 RED ashes signal a commissioning procedure failure. The sensor stays in
decommissioned / hibernation mode.
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