12
6. Frequently asked Questions
Question
Possible cause
Solution
The transmitter LEDs do not light
Inadequate voltage
Check power and cables
Receiver LEDs do not light
Inadequate voltage
Check power and cables
The receiver's alarm LED does not
light up, even when the beams are
blocked
The beams are being reflected to the receiver by
another object
Remove the reflecting object or change the direction
of the beam
The beams were not cut simultaneously
Cut both beams simultaneously
Very short beam cutting time, less than the response
time
Decrease response time
When the beams are blocked, the
receiver's LED lights up, but the
alarm does not go off.
Shorted wiring.
Check wiring and connection to the control panel
The connection is not adequate
Check wiring and connection to the control panel
The alarm LED on the receiver is
always on.
The beams are not properly aligned
Adjust the beams
There are barriers between the transmitter and the
receiver
Remove barriers
The cover or optical parts are dirty
Clean the optical parts with a soft cloth
Intermittent buzz
Inadequate wiring
Check the Wires
Floating power / voltage
Check the power
There are barriers between the transmitter and the
receiver
Remove possible barriers or change the installation
position
Unstable installation base
Solidify the base
Blocking by other moving objects
Adjust the beam
Inadequate alignment, low signal level
Adjust the response time or change the installation
position
