When The COR is ready to process a Check-In, the light on top of the unit will be OFF. The light on top of the COR is used to communicate four types of messages:
Solid Light (no blinking): This indicates that The COR is taking an air scan - a calibration method that is important for accurate results.
Blink-Blink-Blink-Pause: This sequence will repeat as The COR attempts to connect to your wifi network. This will occur every time The COR is plugged in until a connection is established.
Repeated Blink: This rapid sequence indicates that there is an error with The COR. The most common resolution for an error is a power cycle, accomplished by unplugging and plugging back in The COR.
Blink-pause-Blink-pause: This steady repeating blinking signals that The COR is processing a Check-In. Do not remove the cartridge from The COR while this sequence is displayed.