Troubleshooting
How to find the “Master” module
Push the button “Select” for at least 2 seconds:
• The buzzer beeps two times: the module is “Master”.
• The buzzer does not sound: the module is “Slave”.
All configurations
Fault Possible
cause
Solution
Red led blinks
The 2nd module creating the
detection zone is not powered
Check the power supply of the
2nd module
The modules creating the
detection zone are using
different channels
Set both of associated modules
on the same channel
Poor cell alignment
Repeat the alignment
procedure
Cells are covered or in
disqualification
Clear cells field of view
The red alarm LED does not
light up when the beams are
interrupted
Incorrect power supply of the
module
Check power supply
Both cell beams are not
interrupted simultaneously (for
SB450-N, SB4100-N and
SB4200-N barriers only)
Break all cell beams at the
same time
The red alarm LED does not
light up when only one beam is
interrupted
Modules in “AND” mode
Put module in “OR” mode. See
“Operating modes” on page 11
for more details.
Red LED remains lit for more
than 1 minute
Factory-set configuration
mode
Set DIP switches 3 and 4.
Single modules only
Fault Possible
cause
Solution
Red LED: 1 flash light
Module is in “Master” or
“Slave” mode
Turn off the selected mode.
See “Operating modes” on
page 11 for more details.
SB Series AIR Beam Detectors Installation Manual
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