Havinga Problem - Craftsman 139.53904D Owner's Manual

HAVING A PROBLEM?
1. My door will not close and the light bulbs blink on my motor
unit: The safety reversing sensor must be connected and
aligned correctly before the garage door opener will move in
the down direction.
* Verify the safety sensors are properly installed, aligned and
free of any obstructions. Refer to Installation Step 10: Instafl
TheProtector System ° .
• Check diagnostic LED for flashes on the motor unit then
refer to the Diagnostic Chart on the following page.
2. My remotes will not activate the door:
• Reprogram remotes following the programming
instructions. Refer to Programming.
• If remote will still not activate your door, check diagnostic
LEDfor flashes on motor unit then refer to Diagnostic Chart
on the following page.
3. My door reversesfor no apparent reason: Repeat safety
reversetest after adjustments to force or travel limits. The need
for occasional adjustment for the force and limit settings is
normal. Weather conditions in particular can affect door travel.
• Manually check door for balance or any binding problems.
• Refer to Adjustment Step 2, Adjust the force.
4. My door reversesfor no apparent reason after fully closing
and touchingthe floor: Repeatsafety reverse test after
adjustments to force or travel limits. The need for occasional
adjustment for the force and limit settings is normal. Weather
conditions in particular can affect door travel.
• Refer to Adjustment Step 1, Adjust the UPand DOWN Travel
Limits. Decreasedown travel by turning down limit
adjustment screw clockwise.
5. My lights will not turn off when door is open:
• The garage door opener is equipped with a security light
feature. This feature activates the light on when the safety
sensor beam has been obstructed. See Accessories page.
Safet
Reversing Sensor
Bell Wire
-4
@ @
LEDorIIlII I
Sending Eye Safety Reversing
Sensor (Amber Indicator Light)
\
Receiving Eye Safety Reversing
Sensor (Green Indicator Light)
6. My motor unit hums briefly:
• First verify that the trolley is against the stop bolt.
• Releasethe door from the opener by pulling the Emergency
ReleaseRope.
• Manually bring the door to a closed position.
• Loosen the belt by adjusting the outernut4 to 5 turns. This
relieves the tension.
• Run the motor unit from the remote control or door control.
The trolley should travel towards the door and stop. If the
trolley re-engageswith the door, pull the Emergency
ReleaseRope to disengage.
• Decreasethe UP travel by turning the UP Travel adjustment
screw 2 full turns awayfrom the arrow.
_1_ 1-1/4"
(3.18 cm)
• Re-Tightenthe outer nut until the trolley spring is
approximately 1-1/4" (3.18 cm) in length.
• If the trolley does not move away from the bolt, repeat the
steps above.
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