
TCM-7811 Hardware User’s Manual
9
Physical description
1) LED Indicators
There are four Red LED lights numbered from 1 to 4.
LED 1 indicates Boot Up status. It will briefly turn on and off during system boot up, and will stay
continuously on after camera system completes boot up.
LED 2 indicates Power status. It will stay on as long as power is connected to the camera.
LED 3 indicates Heater status. It will light up when camera detects low temperature and activates
the internal heater.
LED 4 indicates Fan status. It will light up when Fan is operational. Fan will operate in high
temperature to cool the device, and in low temperature to spread the heat from heater through the
device.
Please note that this is the “Internal Temperature” as measured by the electronics. The external
temperature will be different from the internal temperature in most cases. The temperatures at
which fan and heater turn on and off are shown in the graph below.
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