Having A Problem (Troubleshooting); Troubleshooting - Craftsman 139.53939D Owner's Manual

Having a Problem (Troubleshooting)

NOTE: Always unplug battery prior to troubleshooting.
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 reversing sensors are properly installed,
aligned and free of any obstructions. Refer to Installation
Step 11: Install The Protector 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:
• Verify your door control does not display "Lock Mode." If it
does, deactivate the Lock Mode following the instructions for
Using the Wall-Mounted Door Control.
• Reprogram remotes following the programming instructions.
Refer to Programming.
• If remote will still not activate your door, check diagnostic
LED for flashes on motor unit then refer to Diagnostic Chart
on the following page.
3. My door reverses for no apparent reason: Repeat safety
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.
• Manually check door for balance or any binding problems.
• Refer to Adjustment Step 2, Setting the Force.
4. My door reverses for no apparent reason after fully closing
and touching the floor: Repeat safety 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, Program the Travel Limits.
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
reversing sensor beam has been obstructed. Refer to
Operation section; Using the Wall-Mounted Door Control,
Light Feature.
6. Battery status LED is not lit properly:
• Check battery connections.
7. My garage door opener beeps:
• A solid LED with beep, sounding approximately every 2
seconds, indicates the motor unit is activating the door and is
operating off of the battery.
• A flashing LED with beep, sounding every 30 seconds,
indicates battery is low.
• If a red LED remains on when the power is restored, and is
accompanied by a beep sounding every 30 seconds, replace
the battery.
® .
34
Bell Wire
Safety Reversing Sensor
Sending Eye Safety
Reversing Sensor
(Amber Indicator Light)
8. My motor unit hums briefly:
• First verify that the trolley is against the stop bolt.
• Release the door from the opener by pulling the Emergency
Release Rope.
• Manually bring the door to a closed position.
• Loosen the belt by adjusting the outer nut 4 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-engages with the door, pull the Emergency Release
Rope to disengage.
• Decrease the UP travel.
• Re-Tighten the outer nut until the trolley spring is
approximately 1-1/4" (3.18 cm) in length.
Trolley
• If the trolley does not move away from the bolt, repeat the
steps above.
"Learn"
Button LED
or Diagnostic
LED
Receiving Eye Safety
Reversing Sensor
(Green Indicator Light)
1-1/4"
(3.18 cm)