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Bell Wire
Safety Reversing Sensor
Diagnostic Chart
1 FLASH
Safety reversing sensors wire
open (broken or disconnected).
OR
2 FLASHES
Safety reversing sensors wire
shorted or black/white wire
reversed.
3 FLASHES
Door control or wire
shorted.
4 FLASHES
Safety reversing sensors
slightly misaligned
(dim or flashing LED).
5 FLASHES
Motor overheated or possible
RPM sensor failure. Unplug
to reset.
6 FLASHES
Motor Circuit Failure.
Replace Receiver Logic
Board.
Diagnostics
Located On
Motor Unit
LED or
Diagnostic
LED
"Learn"
Button
Symptom: One or both of the Indicator lights on the safety 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 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: Motor has overheated; the motor unit does not operate or
trolley is stuck on stop bolt = Motor unit hums briefly; RPM Sensor =
Short travel 6-8" (15-20 cm).
• Unplug unit to reset. Try to operate motor unit, check diagnostic code.
• If it is still flashing 5 times and motor unit moves 6-8" (15-20 cm), replace RPM sensor.
• If motor unit doesn't operate, motor unit is overheated. Wait 30 minutes and retry. If
motor unit still will not operate replace logic board.
Symptom: Motor unit doesn't operate.
• Replace logic board because motor rarely fails.
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.
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