OPERATING CONDITIONS
Normal
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Green LED flashes in both the transmitter and receiver (but not at the same rate)
.
Receiver’s red and yellow LEDs remain OFF.
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Receiver’s reference voltage stays at about 4VDC.
Trouble
Transmitter
Green LED is OFF
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Power has been removed from transmitter. Check for presence of 18 to 32VDC at Terminals 1 (-) and 2 (+),
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Cover has been removed and the Aim Mode button has not been pressed.
Receiver
All LEDs are OFF
.-
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Power has.been removed from receiver. Check for presence of 18 to 32VDC at Terminals 8 (-) and 9 (+).
Red and Yellow LEDs are ON, Green LED is Flashing, and Open Circuit exists between Terminals 6 and 7
.
Receiver’s Tamper Switch (Sl) is open. Receiver’s cover is off or loose.
Red, Yellow, and Green LED’s are ON steady
.
Beam is blocked or transmitter has failed.
Red and Yellow LEDs are OFF, Green LED is Flashing, and Open Circuit exists between Terminals 6 and 7
.
Receiver’s Tamper Switch (52) is open. Receiver’s access door is off or loose.
Red LED is OFF, Yellow LED is ON, Green LED is Flashing, and Open Circuit exists between Terminals 6 and 7
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Beam Blockage slowly occurring over a long period of time due to a buildup of dust, dirt, and/or other materials on unit
cover(s). Additional symptom is a 2VDC or less reference voltage. While cleaning covers should not cause an alarm,
notify all concerned parties prior to cleaning and again after cleaning. See Cleaning under MAINTENANCE section.
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Vibrations causing receiver misalignment. If cleaning the covers does not return the reference voltage to 4VDC,
perform a fine-tune alignment of the receiver. (See FINE-TUNE ALIGNMENT section). If reference voltage is still not
4VDC, press setup button (Step 33) to establish a new reference voltage level.
Red LED is OFF, Yellow LED is ON, Green LED is Flashing, Open Circuit exists between Terminals 6 and 7, and
Reference Voltage is greater than 4.8VDC.
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Beam strength has increased by more than 20% of reference voltage over a long period of time. Causes include im-
proper initial alignment or the removal of a partial beam blockage in existence at the time of alignment. Perform a fine-
tune alignment of the receiver including use of setup button (Step 33). See FINE-TUNE ALIGNMENT section.
Red LED is ON, Yellow and Green LEDs are Flashing Alternately, Open Circuit exists between Terminals 6 and 7.
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Sensitivity Switch (V) is set to invalid setting (8, 9,0, 1). Repeat Step 24.
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