Probable Cause:
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LEDs not positioned behind viewing lens.
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Jumpers in Off position on receiver.
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Bad receiver.
Possible Solution:
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Remove cover, stragten LEDs replace cover carefully so LEDs are positioned behind viewing lens. Use Maintenace Transmitter on test and alarm after installing cover to check visibility of the LEDs.
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Remove cover, check jumpers to right of sounder above Red LED and make sure jumpers P2 and P3 are on.
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After performing steps A and B above and LEDs still do not operate on test or alarm, replace the receiver.