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For PIR MTN630719 , How to solve a problem if you are using air condition and the PIR work without any motion when air condition work, when switch off air condition PIR works normal.

The PIR sensor itself has two slots in it, each slot is made of a special material that is sensitive to IR (please see attached picture).
When the sensor is idle, both slots detect the same amount of IR, the ambient amount radiated from the room or walls or outdoors.
When a warm body like a human or animal passes by, it first intercepts one half of the PIR sensor, which causes a positive differential change between the two halves.
When the warm body leaves the sensing area, the reverse happens, whereby the sensor generates a negative differential change. These change pulses are what is detected.
That means in case of application the servers produce temperature (heat) difference that emits IR radiation and therefore switching command is generated.
In this case we can recommend to use only movement detectors, or enable in those PIR detectors only one "Block" and placed them to detect area, where are not servers to avoid this unwanted movement imitation.
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