Chamberlain LiftMaster PROFESSIONAL 475LM User manual

STANDBY POWER UNIT
Model 475LM Owner’s Manual
INSTALLATION
Mounting the standby power unit (SPU) can be done using one
of two methods. The SPU can be mounted directly on top of the
motor unit or it can be secured on a structural support just
above it.
1. Mounting the SPU Directly to the Motor Unit.
•
Position the SPU on top of the motor unit. Make sure the
motor unit power cord is drawn out from beneath the SPU.
The SPU should sit firmly on top of the motor unit. Adjust
angle iron placement so that it is out of the way of the SPU’s
installation (Figure 1).
• Align the two screw slots on the SPU to the back chassis
holes.
• Secure the SPU to each side of the chassis flanges with 3/4"
screws provided.
2. Mounting the SPU Directly to a Structural Support.
• After the motor unit has been installed, the SPU can be
mounted to either the ceiling or a wall within 3' (.9 m) of the
motor unit.
• Position the SPU as desired to a structural support (ceiling
joist or wall stud) (Figure 2).
• Attach the SPU to the support using the mounting holes on
either side of the SPU.
• Secure the SPU using the 1-1/2" lag screws (provided).
3. Connect the SPU to the Motor Unit.
• Disconnect the motor unit from the electrical outlet.
• Connect the SPU cord into the connector on the
end panel on the motor unit. Connect the motor
unit to the electrical outlet. The SPU will activate
and all LEDs will turn on for 3 seconds.
• The green LED will begin flashing, indicating the
SPU is charging from the motor unit.
IMPORTANT NOTE: Installation of SPU when
permanent electrical power is not available (such as
new construction and the electricity is not installed)
may damage the batteries. Unplug SPU after testing
to prevent damage.
Figure 1
Figure 2
To prevent possible SERIOUS INJURY or DEATH from
electrocution, disconnect ALL electric and battery power
BEFORE performing ANY service or maintenance.
ALWAYS wear protective gloves and eye protection
when changing the battery or working around the battery
compartment.
Power Cord
Power Cord
SPU Cord
SPU
Connector
SPU Cord
475LM Standby
Power Unit 475LM Standby
Power Unit
Bring Power
Cord out left
side slot
Bring SPU Cord out right
side slot away from Antenna
Side Screw
Slots for
Chassis Mount
Standby Power
Unit (SPU)
Holes for
Ceiling
Mount
Lag
Screw
1-1/2"
Structural
Supports
Lag Screws
1-1/2"
3/4" Screw
3/4" Screw
For more information, please visit www.devancocanada.com or call toll free at 855-931-3334

STANDBY POWER UNIT (SPU) DIAGNOSTICS
GREEN LED:
All systems are normal.
• A solid LED light indicates the batteries are fully charged.
• A flashing LED indicates the batteries are being charged.
NOTE: Batteries do not have to be fully charged to operate the
motor unit.
YELLOW LED:
The motor unit has lost power and is operating off of the SPU.
• A solid LED with beep, sounding approximately every 2 seconds,
indicates the motor unit is activating the door and is operating
off of the SPU.
• A flashing LED with beep, sounding every 30 seconds, indicates
batteries are low.
• Once the power is restored, the SPU will recharge. This is
indicated by a flashing green LED.
RED LED:
An error has been detected and the SPU will automatically shut
off. The SPU will attempt to restart by reconnecting to the
batteries. If the error is still present it will shut itself off again.
This process will repeat every 5 minutes or until the error has
been resolved. This is used to prevent further draining of the
batteries.
• If a red LED remains on when the power is restored, and is
accompanied by a beep sounding every 30 seconds, please call
for service.
©2009, The Chamberlain Group, Inc.
114A2745F All Rights Reserved
OPERATION
1. Test the installed SPU with the motor unit.
To test the SPU, disconnect the motor unit power cord from the
electrical outlet.
• A solid yellow LED indicates the SPU is operating on battery
power.
• A flashing yellow LED with beep indicates the SPU is operating
on battery power and that the battery charge is low.
• To test whether the SPU is functioning properly, open and close
the garage door.
• Re-connect the motor unit power cord back into the electrical
outlet.
• Verify that the green LED is flashing on the SPU (indicates that
the SPU is now charging).
• Test completed.
2. Charge the battery.
• Allow the batteries 24 to 48 hours to fully charge before using
the SPU system.
A fully charged SPU supplies 24 Vdc to the motor unit for one to
two days of normal operation during an electrical power outage. If
the battery voltage drops too low, the batteries will disconnect
and the motor unit will no longer operate under battery power.
After the electrical power has been restored, the batteries will
recharge within 48 hours. Under normal usage batteries will last
3 to 5 years.
To obtain maximum battery life and prevent damage, also
disconnect the standby power if you unplug the motor unit while
on vacation or any other extended period of time.
NOTE: Door operation may be limited until batteries are fully
charged. The motor unit’s lights will not turn on during SPU
mode.
To reduce the risk of FIRE or INJURY to persons use only
Chamberlain part #41B591 for replacement batteries.
Replacement Parts
12V Rechargeable Batteries (2) . . . . . . . . . . . . . . . . . . . . . 41B591
Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41A5726
Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72A35
FOR SERVICE, DIAL OUR TOLL-FREE NUMBER:
1-800-528-9131
(Green LED)
(Yellow LED)
(Red LED)

HOW TO ORDER
REPAIR PARTS
DEVANCO CANADA
19192 HAY ROAD, UNIT Q
SUMMERSTOWN, ON K0C 2E0
TOLL FREE: 855-931-3334
www.devancocanada.com
WHEN ORDERING REPAIR PARTS
PLEASE SUPPLY THE
FOLLOWING INFORMATION:
3PART NUMBER
3DESCRIPTION
3MODEL NUMBER