Troubleshooting Guide - SAH ABT-60 Instruction Manual

7

TROUBLESHOOTING GUIDE

Symptom
Transmitter LED does not light.
Receiver power LED does not light.
Alarm LED does not light, even when
beams are blocked.
Although Alarm LED lights when beams
are blocked, alarm doesn't sound.
Alarm LED on receiver does not turn off. Optical axis not aligned.
Intermittent Alarm
Possible Cause
Improper voltage supplied.
Improper voltage supplied.
Infrared beam from transmitter is reflect-
ing from another object and is being sent
into the receiver.
Two beams are not blocked at the same
time.
Shorter blocking than the time set.
Broken or shorted alarm output wires.
Blown fuse on the signal circuit.
Blocking object between transmitter and
receiver.
Dirty cover or reflecting mirror at trans-
mitter and/or receiver.
Bad wiring connection.
Change of supply voltage.
Blocking objects blowing between trans-
mitter and receiver.
Unstable sensor mounting.
Marginal optical axis alignment.
Birds or other large flying objects inter-
rupting the beams.
Remedy
Check power supply and wiring.
Check power supply and wiring.
Remove reflecting object or change in-
stallation location and optical axis direc-
tion.
Check two beams to assure blocking at
same time.
Adjust blocking time to be longer.
Check the wiring.
Repair as required.
Readjust the optical axis.
Remove the blocking objects.
Clean optics with soft cloth.
Check wiring connection.
Check for stabilized voltage.
Remove blocking objects or change
installation location.
Stabilize mounting.
Readjust the optical axis.
Readjust blocking time or relocate instal-
lation.