Anaheim Automation Security+ 3850AD, Owner'S Manual

32

Bell Wire

Safety Reversing Sensor

Diagnostics
Located On
Motor Unit

“Learn”
Button LED 
or Diagnostic
LED 

“Learn” Button

Installed 

Safety Reversing 

Sensor

Your garage door opener is programmed with self-diagnostic 
capabilities. The “Learn” button/diagnostic LED will flash a 
number of times then pause signifying it has found a potential 
issue. Consult Diagnostic Chart below.

Diagnostic Chart

Symptom: One or both of the indicator lights on the safety reversing sensors 
do not glow steady.

•  Inspect sensor wires for a short (staple in wire), correct wiring polarity (black/white 

wires reversed), broken or disconnected wires, replace/attach as needed.

• Disconnect all wires from back of motor unit.
•  Remove sensors from brackets and shorten sensor wires to 1-2 ft (30-60 cm) from 

back each of sensor.

•  Reattach sending eye to motor unit using shortened wires. If sending eye indicator 

light glows steadily, attach the receiving eye. 

•  Align sensors, if the indicator lights glow replace the wires for the sensors. If the 

sensor indicator lights do not light, replace the safety reversing sensors.

Symptom: LED is not lit on door control.

•  Inspect door control/wires for a short (staple in wire), replace as needed.
•  Disconnect wires at door control, touch wires together. If motor unit activates, 

replace door control.

•  If motor unit does not activate, disconnect door control wires from motor unit. 

Momentarily short across red and white terminals with jumper wire. If motor unit 
activates, replace door control wires.

Symptom: Sending indicator light glows steadily, receiving indicator light is 
dim or flashing.

• Realign receiving eye sensor, clean lens and secure brackets. 
• Verify door track is firmly secured to wall and does not move.

Symptom: Door travels 2-3 inches and stops. 

• Reprogram limits and forces. See Adjustment section.
•  If the motor unit continues to travel 2-3 inches, check the travel module connection 

or replace the travel module. 

Symptom: No movement, motor runs 2-3 seconds. 

• Reconnect the emergency release.
• Motor may need to be replaced.

Motor RPM is not 
recognized.

Safety reversing sensors 
slightly misaligned
(dim or flashing LED).

Door control or
wire shorted. 

Safety reversing sensors 
wire shorted or black/
white wire reversed. 

Safety reversing sensors 
wire open (broken or 
disconnected). 

1 FLASH

2 FLASHES

3 FLASHES

4 FLASHES

5 FLASHES

OR