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Troubleshooting list
7
7-1 "No Action" on the transmitter or receiver after power has been applied.
7-2 "No Action" on alarm zone even though the beams are completely blocked.
START
Check to see that power
wires are properly
connected and polarity is
correct.
Check to see that the
input power is within
10.5 to 28 VDC.
Call a technical support.
Disconnect the power wires from the power supply and
the photoelectric beam and test for short or open circuit.
Also test for short circuit to ground.
Repair as required.
OK
OK
Correct terminal
connection and/or
polarity.
Does the power supply
output more than
12 VDC?
There is a possibility that
the power wires has been
cut.
Remove the power wires
from the power supply’s
output terminals.
Measure the voltage.
Does the power now
satisfy the requirement?
The power wires may be too long for the gauge being
used. This will cause the voltage to drop. Use heavier wire
or use additional power supplies closer to the farthest unit.
If you are unsure of the proper wire gauge, call a technical
support.
The power wire is short circuited or grounded.
Repair as required.
The power supply may be malfunctioning. Repair is
required, or call the power supply manufacturer.
Yes
YES
NG
NG
NO
NO
START
The alarm indicator LED
lights but the control
panel does not recognize
the alarm signal.
Remove the alarm circuit
wires from the receiver.
Check the action of the
alarm output relay. Does
the relay open when the
LED indicator activates?
The control panel may
be malfunctioning, call
the control panel
manufacturer.
OK
OK
Change the layout of
the beam, or call a
technical support
for further advice.
If the beam is interrupted
at a location far from the
receiver, no alarm signal
is generated, but when
the beam is interrupted
at a location near the
receiver, an alarm signal
is generated.
Remove the alarm
circuit wire from the
receiver, and check for
short circuits on the wires.
When the receiver’s
cover is removed and
the beems are blocked,
the alarm indicator LED
does not light.
Adjust vertical and/or horizontal alignment in order to move
the IR energy off of the reflective surface. Monitor the beam
strength (monitor jack) while adjusting beam to insure
stable alignment.
The unit may be affected by electrical noise.
May need to use shielded wires and/or metalic conduit
pipe. Call a technical support if you are unsure of the
proper shielding techniques.
YES
NG
NO
NO
Is the control panel
zone’s "loop response
time" set to within 1
second?
Call a technical support.
Re-wiring of the alarm
circuit wire is required.
Replace or repair
as necessary.
Re-program the zone’s
“loop response time”
appropriately.
Are there any other
outdoor beams near the
installation site?
Remove power from all
other transmitters and
conduct a walk test.
OK
NG
NO
YES
YES
Check other items.
Does the photoelectric
beam work properly?
The receiver may be
affected by other beam
transmitters, or the
beams are being
reflected off of a shiny
surface.
Call a technical support.
Are there any surface
between the transmitter
and the receiver that are
reflecting the beam?
When the lens of the
receiver are completely
covered, an alarm
signal is generated.
Remove the alarm circuit
wire from the receiver,
place a voltmeter on the
resistance, and measure
the alarm output relay.
Does the relay open
when power is removed?
The beam interruption
time is set too long.
Turn the inturruption time adjustment dial
counter-clockwise one graduation.
.
The intended target does
not block both the upper
and the lower beams
completely.
Does the receiver work when both the upper and the lower
beams are completely blocked? If so, the mounting height
is not proper. Adjust the mounting height.
NO
OK
NG
NO
YES
