Manual Release; Maintenance - Chamberlain LiftMaster LA412 Owner's Manual

OPERATION AND MAINTENANCE

MANUAL RELEASE

In case of a power failure, the operator can be disengaged from the gate. With an
operator, the release action may sometimes feel stiff/jerky, which is normal and has
no effect on function.
RELEASE
1
Insert the key into the lock.
2
Turn the key counter-clockwise 180°.
3
Turn the release lever counter-clockwise 180°.
Operator is in manual mode and the gate can be opened and closed manually.
ENGAGE
1
Turn the release lever clockwise 180°. This engages the motor.
2
Turn the key clockwise 180°. This locks the release lever.
3
Remove the key and store in a safe place.
The operator is now engaged.

MAINTENANCE

Disconnect power before servicing.
DESCRIPTION
External Entrapment Protection System
Manual Release
Gate
Accessories
Electrical
Mounting Hardware
Batteries
Operator
Warning Signs
NOTES:
• Severe or high cycle usage will require more frequent maintenance checks.
• Inspection and service should always be performed anytime a malfunction is
observed or suspected.
• When servicing, please do some "house cleaning" of the operator and the area
around the operator. Pick up any debris in the area. Clean the operator as
needed.
• It is suggested that while at the site voltage readings be taken at the operator.
Using a Digital Voltmeter, verify that the incoming voltage to the operator it is
within ten percent of the operator's rating.
• See page 32 for instructions on how to adjust the gate force.
» MANUAL RELEASE + MAINTENANCE
1
1
TASK
Check and test for proper operation
Check and test for proper operation
Inspect for wear or damage
Check all for proper operation
Inspect all wire connections
Check for tightness
Replace
Inspect for wear or damage
Make sure they are present
35
2
2
CHECK AT LEAST ONCE EVERY
MONTH 6 MONTHS
X
X
X
X
X
X
X
X
3
3
3 YEARS
X