To Open The Door Manually; Maintenance - Chamberlain 8550 Manual

To Open the Door Manually

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.

Maintenance

EVERY MONTH
• Manually operate door. If it is unbalanced or binding, call a trained door systems technician. Check
to be sure door opens and closes fully. Adjust if necessary (refer to Adjustment section). Repeat the
safety reverse test. Make any necessary adjustments (refer to Adjustment section).
EVERY YEAR
• Oil door rollers, bearings and hinges. The garage door opener does not require additional
lubrication. Do not grease the door tracks.
EVERY TWO TO THREE YEARS
• Use a rag to wipe away the existing grease from the garage door opener rail. Reapply a small layer
of white lithium grease to the top and underside of the rail surface where the trolley slides.
• Test the battery and consider replacing the battery to ensure the garage door opener will operate
during an electrical power outage.
NOTICETo complywith FCC and or IndustryCanada rules(IC), adjustment or modifications of this receiver and/or transmitter are
prohibited, except for changing the code setting or replacing the batteryTHERE ARE NO OTHER USER SERVICEABLE PARTS.
Tested to Comply with FCC Standards for Home or office use. Operation is subject to the following tow conditions: (1) this device
maynot cause harmful interface, and (2) thisdevice must accept anyinterference received, including interference that may cause
undesired operation.
DISCONNECT THE TROLLEY
1
The door should be fully closed if possible.
2
Pull down on the emergency release handle.
RECONNECT THE TROLLEY
The lockout feature prevents the trolley from reconnecting
automatically.
1
Pull the emergency release handle down and back (toward the
opener). The door can then be raised and lowered manually as
often as necessary.
2
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 control.
THE REMOTE CONTROL BATTERY
To prevent possible SERIOUS INJURY or DEATH:
• NEVER allow small children near batteries.
• If battery is swallowed, immediately notify doctor.
To reduce risk of fire, explosion or chemical burn:
• Replace ONLY with 3V2016 coin batteries.
• DO NOT recharge, disassemble, heat above 212°F (100°C) or incinerate.
To replace the batteries, remove the two screws and open the remote
control housing. Push the battery out of the holder for removal. Insert
replacement batteries positive side up (+).
Replace the batteries with only 3V2016 coin cell batteries. Dispose of
old batteries properly.
34
Batteries
Screws (2)