Craftsman 139.53915D - Manual (Page 34)

34
Safety Reversing Sensor
Bell Wire
LED or
Diagnostic
LED
“Learn”
Button
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 of
each 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: 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.
Motor Circuit Failure.
Replace Receiver
Logic Board.
Motor overheated or possible
RPM sensor failure. Unplug
to reset.
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
6 FLASHES
OR
Installed
Safety Reversing
Sensor