The CTR-500000-SC-RSU-00 controller has one LED status indicator - D10.
The D10 LED indicates the controller's status. At power on, the LED is not lit. During the microprocessor's diagnostic self tests, the LED is lit continuously. Upon completion of self tests, the LED blinks at a rate of once per second. Thereafter, when a touch is detected, the LED lights continuously. When no touch is detected, the controller LED resumes blinking at a rate of once per second. If an error condition is detected, the LED blinks at a rate of twice per second.