Test Cable Tension Monitor; Adjustment; Test Power Door Lock; To Open Door Manually - Chamberlain LiftMaster Security+ 3800E Owner's Manual

ADJUSTMENT STEP 5

Test Cable Tension Monitor

If your cable tension monitor has been activated the
Indicator Light will blink 9 times. See (Figure 1) page 18.
ADJUSTMENT STEP 6

Test Power Door Lock

TEST
• With the door fully closed, the power door lock bolt
should be protruding through the track.
• Operate the door in the open direction. The power door
lock should retract before the door begins to move.
• Operate the door in the down direction. When the door
reaches the fully closed position, the power door lock
should automatically activate to secure the door.
NOTE: If the power door lock does not function, the lock
can be manually released by sliding the manual release
handle to the open position.
ADJUSTMENT STEP 7
To Open the Door Manually
Disengage door lock before proceeding. The door should
be fully closed if possible. Pull down on the emergency
release handle until a click noise is heard from the unit
and lift the door manually. To reconnect the door to the
opener, pull down the emergency release handle straight
down a second time until a click noise is heard from the
unit. The door will reconnect on the next UP or DOWN
operation.
Test the emergency release:
• Make sure the garage door is closed.
• Pull the emergency release handle. The garage door
should then be able to be opened manually.
• Return the door to the closed position.
• Pull the emergency handle a second time.
• Reconnect the door to the opener.
To prevent possible SERIOUS INJURY or DEATH from a falling
garage door:
• If possible, use emergency release handle to disengage door
ONLY when garage door is CLOSED. Weak or broken springs
or unbalanced door could result in an open door falling
rapidly and/or unexpectedly.
• NEVER use emergency release handle unless garage doorway
is clear of persons and obstructions.
Emergency
Release Handle
20
Power Door Lock
Manual Release
Lock Bolt
"Locked"