Page 4 of 4
75.0061.07 LO-21 20190318
Page 4 of 4
75.0061.07 LO-21 20190318
TROUBLESHOOTING
Red LED does not
illuminate during
“closing” cycle
OR
red
LED illuminates in latch
check
Red and black wires are reversed
(polarity sensitive)
Reverse the polarity of the moror wires.
AC motor application: in-line
resistor not installed
Install in-line resistor on red wire of LO-21
(AC motors only).
Faulty input power or data
Check voltage supply to LO-21
(12 – 24 VAC / 15 – 24 VDC).
Check voltage on orange, brown, red, and
black wires.
Door will not open or
close (green LED is on)
Lockout safety beams are blocked
1. Remove any obstructions with safety
beam path.
2. Check all wiring related to safety
beams.
3. Test the safety beams for proper
operation.
Faulty safety beam receiver or
transmitter
Faulty power supply to safety
beam
Faulty safety beam wiring
Door will not re-cycle
open when activated
during “closing” cycle
Lockout time is not long enough
(red LED goes out before door is
fully closed)
Increase lockout time. Refer to DIP switch
chart.
Data wires reversed at Bodyguard/
DK-12
Reverse data wires at Bodyguard/DK12.
Check voltage on data wires (red and red/
white).
Green LED does not
illuminate when safety
beams are blocked
Faulty safety beam receiver
Test the beams and LO-21 with multi-
meter.
Faulty connection on purple and
gray wire from LO-21
Make contact with the purple and gray
wires. Green LED should illuminate.
Improper voltage reading
on data lines at LO-21
Incorrect wiring at LO-21
Verify correct polarity at terminals 6 and 7
on Bodyguard.
Faulty LO-21
If data line voltage remains constant at LO-
21 for open and close dpositions and all
wiring verified, replace faulty LO-21.
©BEA
| Original Instructions |
PLEASE KEEP FOR FUR
THER USE - DESIGNED FOR COLOR PRINTING
BEA, the sensor manufacturer, cannot be held responsible for incorrect installations or inappropriate adjustments of the sensor/device; therefore, BEA
does not guarantee any use of the sensor outside of its intended purpose.
BEA strongly recommends that installation and service technicians be AAADM-certifi ed for pedestrian doors, IDA-certifi ed for doors/gates, and factory-
trained for the type of door/gate system.
Installers and service personnel are responsible for executing a risk assessment following each installation/service performed, ensuring that the sensor
system installation is compliant with local, national, and international regulations, codes, and standards.
Once installation or service work is complete, a safety inspection of the door/gate shall be performed per the door/gate manufacturer recommendations
and/or per AAADM/ANSI/DASMA guidelines (where applicable) for best industry practices. Safety inspections must be performed during each service
call – examples of these safety inspections can be found on an AAADM safety information label (e.g. ANSI/DASMA 102, ANSI/DASMA 107).
Verify that all appropriate industry signage and warning labels are in place.
BEA INSTALLATION/SERVICE COMPLIANCE EXPECTATIONS
Tech Support: 1-800-407-4545 | Customer Service: 1-800-523-2462
General Tech Questions: Tech_Services@beainc.com | Tech Docs: www.BEAinc.com
