Diagnosticchart - Craftsman 139.536481DM Manual Del Propietário

Bell Wire
I 1
Safety Reversing Sensor
DiagnosticChart
Safety reversingsensorswire
open(broken or disconnected).
OR
Safety reversingsensorswire
shorted or black/whitewire
reversed.
Door controlor wire shorted.
Safety reversingsensorsslightly
misaligned (dim or flashingLED).
Motor overheatedor possible
RPM sensorfailure. Unplugto
reset.
Motor circuit failure.
Replacereceiver logic board.
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.
• 0 Symptom:One or both of the Indicator fightson the safety sensorsdo not glow steady.
• Inspect sensor wires for a short (staple in wire), correct wiring polarity (black/white
wires reversed), broken or disconnected wires, replace/attachas needed.
• Disconnectall wires from back of motor unit.
• Removesensors from brackets and shorten sensor wires to 1-2 ft (30-60 cm) from
back each of sensor.
• Reattachsending eyeto motor unit using shortened wires. If sending eye indicator
light glows steadily, attach the receiving eye.
• Align sensors, if the indicator lights glow replacethe wires for the sensors. If the
sensor indicator lights do not light, replacethe safety sensors.
• Q Symptom:LED is not lit on door control.
• Inspect door control/wires for a short (staple in wire), replace as needed.
• Disconnectwires 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, replacedoor control wires.
• Q Symptom:Sendingindicatorlight glowssteadily, receivingindicatorlight is dim or
flashing.
• Realignreceiving eye sensor, clean lens and secure brackets.
• Verify door track is firmly secured to wall and does not move.
• Q Symptom:Motor has overheated;the motor unit does not operate or trolley is stuckon
stop bolt = Motor unit hums briefly; RPM Sensor= Shorttravel 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 replacelogic board.
• 0 Symptom:Motor unit doesn'toperate.
• Replacelogic board becausemotor rarely fails.
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