BASIC OPERATIONE-BUS Digital Room Sensor Technical Guide4Figure 3: E-BUS Digital Room Sensor ComponentsAlarm LEDSenseLEDOverrideLEDOverrideButtonDisplayButtonUpButtonDownButtonLCDDisplayCover SetScrewMICROCHIPPIC24HJ256GP206Back ViewRemote ThermistorSensor ConnectorFront ViewE-BUS CableConnection +12VdcGND-COMSHLDComm LED(Not visiblewith backcover on)Display OverrideOVERRIDE ALARMSensor OperationWhen power is first applied to the OE217-02 E-BUS Digital RoomSensor, the sensor will display the Current Room Temperature and thecurrent setting of the slide offset. The OE217-03 model will also displayRelative Humidity.NOTE: The sensor readings are not accurate until the controllerthat the sensor is connected to is done calibrating.The sensor has 4 buttons—, , , and. You can also access certain functions by touching the areabelow the and buttons. The sensor has 4LEDs—one to indicate an Override, one to indicate an Alarm, one toindicate Communications, and one to indicate that a button has beenpressed. See Figure 3 for LED and Button Descriptions.An icon for the current mode of operation will appear in the sensordisplay. The operation mode icons are a Snowflake for Cooling Mode,a Flame for Heating Mode, a Fan in motion for Vent Mode, and a Moonfor Unoccupied Mode. When the unit is in Unoccupied Mode, thescreen’s background will turn dark. See Figure 9, page 7 for examplesof operation modes.Buttons and LEDsLED OperationRefer to Figure 3 for LED locations.Alarm LED: The Alarm LED will blink when there is an alarm fromthe Controller.Sense LED: The Sense LED will blink when the sensor gets a validtouch.Override LED: The Override LED is inoperable when in OccupiedMode. In Unoccupied Mode, if you touch the button, theOverride LED will blink, indicating an override request. The Control-ler will respond by sending the unit into override. The Override LEDwill then stay on for the duration of the Override. Any time the Unitis in Override, you can request to cancel the override by touching the button, and the Override LED will blink. The Unit willthen cancel the override. The Override LED will then turn off.Comm LED: The Comm LED located on the back of the sensorblinks on whenever communications are sensed.
