One sensor is green and the other yellow. Why is that?
Md Ariful Islam
বিএসসি(সিএসই)
,
এমবিএ(মার্কেটিং)
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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
The "orange/red" eye is putting out the infrared beam to the "green" receiving eye. If the green is not lit or blinking, it needs to be adjusted until it is a steady ON green or the door will not operate.
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