Linear LD 033 manual Safety Beam Test, Sender and receiver should be lit

4 Testing the Infrared Safety Beam

The safety beam has two components, a sender and a receiver. The sender produces a narrow infrared beam that travels across the bottom of the door opening to the infrared receiver. If an object blocks the infrared beam while the door is closing, the door will stop, then reverse and fully open (the opener’s light will fl ash three times).

As a safety feature, the opener will ignore signals from all remote controls if the door is open and the

6 Testing & Adjusting the Door Force Safety System

The door force adjustments are located on the side of the opener. The door force adjustments must be properly set at all times. The CLOSE FORCE adjustment controls how much force is required to cause the door to reverse direction if an obstruction is encountered during closing. The OPEN FORCE adjustment controls how much force is required to stop the door if an obstruction is encountered during opening.

infrared safety beam is blocked or out of alignment. In this case, the door can be forced closed by pressing and holding the wall station’s up/down arrow pushbutton (be sure the door area is in clear view).

WARNING

SETTING THE DOOR FORCE

WARNING

With the door closed, disengage the trolley from the chain during these alignment tests by pulling the red release handle.

Safety Beam Test

1	Check that the opener has power. The green lights on
	the sender and receiver should be lit.
2	If the receiver’s green light is on, but the red light is off,
	the receiver has power but is not detecting the infrared

WARNING

Serious injury or death from a closing garage door may result because of failure to test and adjust safety reverse system. Repeat this test monthly and adjust as needed.

SAFETY BEAM INDICATORS

Too much door force will interfere with the proper operation of the safety system. SOMEONE COULD BE SERIOUSLY INJURED OR KILLED IF THE DOOR FORCE IS SET TOO HIGH. A closing door might not reverse properly when required and someone could be pinned under it. An opening door might not stop when going up and someone hanging on the door could get pinned between the door and the header. Do not increase the door force beyond what is required to move the

ADJUSTING THE OPEN FORCE

ADJUSTING THE CLOSE FORCE

UNDER-SETTING THE CLOSE FORCE

DECREASE CLOSE FORCE

beam from the sender. The red light might fl ash when

the beam is partially detected. This can be caused by

mis-alignment or something blocking the beam. Adjust

the safety beam sender and receiver while watching the

GREEN LIGHT

ON = POWER ON OFF = POWER OFF

RED LIGHT

RED LIGHT

door. DO NOT USE THE DOOR FORCE ADJUSTMENT TO COMPENSATE FOR A BINDING OR STICKING GARAGE DOOR. PERFORM THE SAFETY REVERSAL SYSTEM TEST (STEPS 4-6) MONTHLY!

ADJUSTMENT UNTIL THE DOOR REVERSES MIDWAY WHILE GOING DOWN

receiver’s red light (stay out of the beam while aligning

it). When the red light stays on, the beam is aligned.

SAFETY BEAM INDICATOR TABLE

GREEN ON	POWER ON
GREEN OFF	POWER OFF
RED ON	BEAM OK - NO BLOCKAGE
RED OFF	BEAM BLOCKED OR MIS-ALIGNED
RED FLASHING	BEAM ALIGNED POORLY

➤NOTE: If the receiver’s red light remains off, check

for: 1) Dirt on the receiver’s lens, 2) Sunlight shining into the receiver’s lens, 3) A short in the safety beam wiring (from staples or at the opener terminals).

3With the door closed and the opener disengaged from the door, press the wall station’s UP/DOWN ARROW button to move the traveler (the part on the belt or chain that the trolley engages with) to the up position (away from the door).

4Push the wall station’s UP/DOWN ARROW button again. While the traveler is moving to the down position (toward the door), block the safety beam. THE TRAVELER

MUST STOP,THEN REVERSE TO THE UP POSITION. The opener’s light should fl ash three times.

5Place an object in the path of the safety beam. Check that constant pressure is required on the wall station’s UP/DOWN ARROW button to cause the traveler to move toward the down position. Release the pushbutton before the opener stops; check that the traveler returns to the up position.

➤NOTE: The garage door opener will not respond to a CLOSE command from a radio transmitter if the safety beam is blocked.

6To reconnect the opener, fl ip the release lever up. Raise the door manually until the opener reconnects.

ON = BEAM ALIGNED, NO OBSTRUCTION

OFF = BEAM NOT ALIGNED, OR OBSTRUCTION

BLINKING = BEAM NEEDS BETTER ALIGNMENT

GREEN LIGHT

ADJUSTING THE BEAM

ADJUST THE SENDER

AND RECEIVER UNTIL

THE RED INDICATOR

LIGHTS SOLID

CHECKING FOR REVERSAL
	THE TRAVELER MUST REVERSE
	WHEN THE BEAM IS INTERRUPTED
		DOWN
BLOCK THE BEAM		UP
WHILE THE TRAVELER
IS MOVING DOWN		TOWARD
TOWARD		OPENER
		TRAVELER
DOOR
CHECKING FORCED CLOSURE FEATURE		VERIFY THAT CONSTANT
		PRESSURE IS REQUIRED
		ON THE WALL STATION'S
		PUSHBUTTON TO MAKE
		THE TRAVELER GO DOWN

PLACE AN OBJECT

IN THE BEAM'S PATH RELEASE PUSHBUTTON

BEFORE THE OPENER STOPS, THE TRAVELER SHOULD RETURN TO THE UP POSITION

➤NOTE: Read the following directions carefully before changing the door force adjustments.

WARNING

Always perform the Door Force Safety System Test after making any adjustments to the opener.

Door Force Safety System Test

1Start with the door open. Use the remote control to cycle the door during this test.

Adjusting the Close Force

2Turn the CLOSE FORCE adjustment 1/8-turn at a time in the DECREASE direction (counterclockwise) until the door stops and reverses mid travel while going down.

3Turn the CLOSE FORCE adjustment 1/8-turn at a time in the INCREASE direction (clockwise) until the door fully closes without reversing.

Safety Reversal System Test

4Lay a 2 x 4 board fl at on the fl oor where it will be struck by the center of the door as it closes.

5Verify that the door reverses when it strikes the board. The door must reverse within two seconds after striking the board.

➤NOTE: If the door stops after encountering the board and does not reverse, the CLOSE FORCE needs to be

DECREASED.

6	Repeat the Safety Reversal System Test until the door
	reverses within two seconds of striking the board.
7	Adjusting the Open Force
	Turn the OPEN FORCE adjustment 1/8-turn at a time
	in the DECREASE direction (counterclockwise) until
	the door stops mid travel while going up.
8	Turn the OPEN FORCE adjustment 1/8-turn at a time
	in the INCREASE direction (clockwise) until the door

DECREASE

CLOSE FORCE

SETTING THE CLOSE FORCE

INCREASE CLOSE FORCE

ADJUSTMENT UNTIL THE

DOOR CLOSES FULLY

WITHOUT REVERSING

INCREASE

CLOSE FORCE

TESTING THE SAFETY REVERSAL SYSTEM

TEST WITH SMALL OBSTACLE

THE DOOR MUST REVERSE

WITHIN 2-SECONDS AFTER

IMPACT WITH A 2 x 4 BOARD

2 x 4 BOARD LAID FLAT

UNDER CENTER OF DOOR

UNDER-SETTING THE OPEN FORCE SETTING THE OPEN FORCE

DECREASE	INCREASE
OPEN FORCE	OPEN FORCE
DECREASE OPEN FORCE	INCREASE OPEN FORCE
ADJUSTMENT UNTIL THE	ADJUSTMENT UNTIL THE
DOOR STOPS MIDWAY	DOOR OPENS FULLY

5 Adjusting the Open and Close Limits

fully opens without stopping.

WHILE GOING UP WITHOUT STOPPING

The limit adjustments that control how far the door will open or close are located on the side of the opener. The limits should be adjusted so the door opens just short of any door stops, and closes right at the fl oor level. Each

full turn of a limit adjustment equals about 2-½” of door travel.

CAUTION

Set the open and close limits carefully. Setting the limits beyond the distance that the door can travel could cause damage to the door, the door hardware, or opener.

1Start with the door in the closed position.

2Activate the remote control. Wait while the door moves to the open position and stops.

3Examine the position of the door.

•If the door needs to open more, turn the OPEN LIMIT adjustment clockwise ¼-turn (towards UP on the label) to raise the open limit.

•If the door needs to open less, turn the OPEN LIMIT adjustment counterclockwise ¼-turn (towards DOWN on the label) to lower the open limit.

➤NOTE: On jamb doors, set the open limit so the door stops just short of level (see figure).

4Activate the remote control. Wait for the door to move down a few feet, then activate the remote control again to stop the door.

5Repeat Steps 2-4 until the open limit is properly adjusted.

6Activate the remote control. Wait while the door moves to the closed position and stops.

7Examine the position of the door.

•If the door needs to close more, turn the CLOSE LIMIT adjustment counterclockwise ¼-turn (towards DOWN on the label) to lower the close limit.

•If the door needs to close less, turn the CLOSE LIMIT adjustment clockwise ¼-turn (towards UP on the label) to raise the close limit.

8Activate the remote control. Wait for the door to move up a few feet, then activate the remote control again to stop the door.

9Repeat Steps 6-8 until the close limit is properly adjusted.

➤NOTE: If the door stops during opening or reverses during closing before reaching the limits, the door force adjustment needs to be set. Change the adjustment as described in the next section then return to this step to finish setting the limits.

CHECKING WHERE THE DOOR STOPS

DOWN	UP
EXAMINE THE SPOT WHERE
THE DOOR STOPS OPENING

SETTING THE OPEN LIMIT ON A JAMB DOOR

JAMB DOOR	SET THE OPEN LIMIT SO THE DOOR
	STOPS JUST SHORT OF LEVEL

NOTE: SETTING THE OPEN LIMIT TOO HIGH WILL CAUSE THE OPENER TO "BUCK" WHEN STARTING DOWN

SETTING THE OPEN LIMIT
DOWN	UP
OPEN LIMIT
ADJUSTMENT
	USE A SCREWDRIVER
	TO ADJUST THE LIMIT

CHECKING WHERE THE DOOR STOPS

UP	EXAMINE THE SPOT WHERE
	DOOR STOPS CLOSING

	DOWN
SETTING THE CLOSE LIMIT
DOWN	UP
CLOSE LIMIT
ADJUSTMENT		USE A SCREWDRIVER
		TO ADJUST THE LIMIT

7	Replacing the Opener’s Lamp	REPLACING LAMP
If the opener’s safety lamp fails to light manually or when
the opener is cycled, the light bulb needs replacing. Use
the following steps to replace the light bulb.
1	Swing the light cover open to expose the light bulb and
	lamp socket.
2	Replace the light bulb with a 100 watt maximum rough
	service bulb (sometimes called a garage door bulb).
3	Swing the light cover closed, snapping it shut.
4	Press the wall station’s lamp button to test the lamp.	SWING COVER OPEN	INSTALL NEW BULB (UP TO 100 WATTS)

8 Troubleshooting

LAMP FLASHES	PROBLEM	CAUSE	REMEDY
TROUBLE CODE
1 FLASH	No problem	Remote control entered into	Add any additional remote controls
		memory	(MegaCode™ type only)
			Check wall station wires. Be sure both are
2 FLASHES	Door won’t close	Shorted wall station wires	connected to the terminal screws.Check for a
			staple in the wall station wires. Remove any
			staples compressing the wire.
3 FLASHES	Door won’t close	Safety beam obstacle	Check for obstacles. Align the safety beam
			(Section 4)
4 FLASHES	Door reverses	Open or Close force	Check for binding or un-balanced door.
	or won’t open or	exceeded, or motor thermal	Adjust the door force (Section 6). If motor had
	close	shutdown	thermal shutdown, wait 30 minutes and retry.
5 FLASHES	Door won’t open	Remote was activated while	Unlock vacation switch on wall station
	from transmitter	vacation switch was locked
6 FLASHES	Motor ran longer	Mechanical or electronic	Call your local garage door professional
	than 30 seconds	failure

FCC NOTICE

Changes or modifi cations not expressly described in this manual or approved by the manufacturer could void the user’s authority to operate the equipment. This device complies with FCC Part 15. Operation is subject to the following two conditions: (1) This device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation.

LIMITED WARRANTY

This Linear product is warranted to the original consumer against defects in material and workmanship for:

MODEL	ELECTRONICS	MECHANICAL	MOTOR	BELT
LDO50	1 year	5 years	Lifetime	Lifetime
LDO33	1 year	5 years	10 years	Lifetime

This product is warranted to the original consumer against defects in material and workmanship for the periods mentioned above. Linear will repair, or at its option, replace, any device that it fi nds requires service under this warranty, and will return the repaired or replaced device to the consumer at Linear’s cost. Devices must be sent to Linear for service at owner’s expense. This warranty does not apply to damage to the product from negligence, abuse, abnormal usage, misuse, accidents, normal wear or tear or due to failure to follow Seller’s instructions, or arising from improper installation, storage or maintenance. In no event will Linear be responsible for incidental, compensatory, punitive, consequential, indirect, special or other damages. The remedies provided by this warranty are exclusive. Some states do not allow the exclusion or limitation of incidental and consequential damages, so the above limitation or exclusion may not apply to you. Any warranties implied by law are limited to the time periods set forth above. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. This warranty gives you specifi c legal rights, and you may also have other rights which vary from state to state.

For warranty service and shipping instructions contact Linear at the phone number shown below. In order to be protected by this warranty, save your proof of purchase and send a copy with equipment should repair be required. All products returned for warranty service require a Return Product Authorization Number (RPA#). Contact Linear Technical Services at 1-800-421-1587 for an RPA# and other important details.

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