Chamberlain 3850 - Manual (Page 30)

30
CARE OF YOUR OPENER
MAINTENANCE SCHEDULE
Once a Month
• Manually operate door. If it is unbalanced or binding, call
a trained door systems technician.
• Check to be sure door opens & closes fully. Adjust limits
and/or force if necessary (see pages 23 and 24).
• Repeat the safety reverse test. Make any necessary
adjustments (see Adjustment Step 3).
Once a Year
• Oil door rollers, bearings and hinges. The opener does
not require additional lubrication. Do not grease the door
tracks.
To Open the Door Manually
The door should be fully closed if
possible. Pull down on the
emergency release handle and lift
the door manually. To reconnect
the door to the opener, press the
door control push bar.
The lockout feature prevents the
trolley from reconnecting
automatically. Pull the emergency
release handle down and back
(toward the opener). The door can
then be raised and lowered
manually as often as necessary.
To disengage the lockout feature,
pull the handle straight down. The
trolley will reconnect on the next
UP or DOWN operation, either
manually or by using the door
control or remote.
To prevent possible SERIOUS INJURY or DEATH from a falling
garage door:
• If possible, use emergency release handle to disengage
trolley 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.
• NEVER use handle to pull door open or closed. If rope knot
becomes untied, you could fall.
Trolley
Release
Arm
NOTIC
E
Emergency
Release
Handle
(Pull Down)
Trolley
Release
Arm
NOTICE
Emergency
Release
Handle
(Down and Back)
LOCKOUT POSITION
MANUAL DISCONNECT
POSITION
WARNING
CAUTION WARNING
WARNING