Craftsman 139.5391 owner manual Not glow steady, Symptom LED is not lit on door control

Bell Wire

Safe_ 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

"-0

Symptom: One or both of the Indicator lights on the safety sensors do

Safety

sensors

wire open

not glow steady.

•

Inspect sensor wires for

a short (staple in wire), correct wiring polarity

(broken

or disconnected).

/black/white

wires reversed'L broken

or disconnected

wires, replace/attach

OR

as needed.

•

Disconnect

all wires

from

back of motor

unit

•

Remove sensors from brackets and

shorten sensor wires

to 1-2 fl (30-60

cm;

from back each of sensor.

Safety sensors

w=re

•

Reattach sending eye to motor unit

using shortened

wires.

If sending eye

indicator light

glows

steadily, attach

the

receiving

eye.

shorted

or

black/white

wire

reversed

•

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

-0

Symptom: LED is not lit on door control

Door

control

or

•

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.

wire

shorted.

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.

Safety Sensors slightly misaligned (dim or flashing LED).

==

..............T"'w

Motor overheated or

possible RPM sensor failure. Unplug to reset.

_ymptom: 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"(15-20cm).

•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 wilt not operate replace logic board.

	)tom: Motor unit doesn't operate.
Motor Circuit Failure.	• Replace logic board because motor rarely fails.
Replace Receiver
Logic Board.

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