Chamberlain 9950D HAVING A PROBLEM, on my motor unit:, 2. My remotes will not activate the door:, 3. My door reverses for no apparent reason:

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: 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:	— —	"Learn"
• Verify your Premium door control is not blinking. If	—	Button
		Button
	— —	LED or
it is blinking, deactivate the Lock Mode following		LED or
it is blinking, deactivate the Lock Mode following		Diagnostic
the instructions for Using the Multi-Function Door		LED
Control.	Safety Reversing Sensor
• Reprogram remotes following the programming	Sending Eye Safety Reversing	Receiving Eye Safety Reversing
instructions. Refer to Programming.	Sending Eye Safety Reversing	Receiving Eye Safety Reversing
instructions. Refer to Programming.	Sensor (Amber Indicator Light)	Sensor (Green Indicator Light)
• 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	5. My lights will not turn off when door is open:
force or travel limits. The need for occasional	• The garage door opener is equipped with a
adjustment for the force and limit settings is normal.	• The garage door opener is equipped with a
adjustment for the force and limit settings is normal.	security light feature. This feature activates the
Weather conditions in particular can affect door	security light feature. This feature activates the
Weather conditions in particular can affect door	light on when the safety sensor beam has been
travel.	light on when the safety sensor beam has been
travel.	obstructed. Refer to Operation section; Using the
• Manually check door for balance or any binding	obstructed. Refer to Operation section; Using the
• Manually check door for balance or any binding	Wall Mounted Door Control, Light Feature.

problems.

• Refer to Adjustment Step 2, Adjust 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, Adjust the UP and DOWN Travel Limits. Decrease down travel by turning down limit adjustment screw clockwise.