Chamberlain WHISPER DRIVE HD900D - Manual (Page 33)

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NOTE: LED is most visible with work light off.
GREEN LED:
All systems are normal.
• A solid LED light indicates the battery is fully charged.
• A flashing LED indicates the battery is being charged.
NOTE: Battery do not have to be fully charged to operate the
motor unit.
ORANGE LED:
The motor unit has lost power and is operating off of the battery.
• A solid LED with beep, sounding approximately every 2
seconds, indicates the motor unit is activating the door and is
operating off of the battery.
• A flashing LED with beep, sounding every 30 seconds,
indicates battery is low.
• Once the power is restored the battery will recharge. This is
indicated by a flashing green LED.
RED LED:
• If a red LED remains on when the power is restored, and is
accompanied by a beep sounding every 30 seconds, replace
the battery.
• To obtain maximum battery life and prevent damage, also
disconnect the battery if you unplug the motor unit while on
vacation or any other extended period of time.
To reduce the risk of FIRE or INJURY to persons:
• Disconnect ALL electric and battery power BEFORE
performing ANY service or maintenance.
• Use ONLY Chamberlain part # 41A6357-1 for replacement
battery.
• DO NOT dispose of battery in fire. Battery may explode.
Check with local codes for disposal instructions.
Battery Status LED
Battery Backup (Optional)
OPERATING INSTR UCTIONS
1. Test the installed battery with the motor unit.
To test the battery, disconnect the motor unit power cord from
the electrical outlet.
• A solid orange LED indicates the battery is operating on battery
power.
• A flashing orange LED with beep indicates the unit is operating
on battery power and that the battery charge is low.
• To test the battery 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 BBU (indicates that
the battery is now charging).
• Test completed.
2. Charge the battery.
• Battery will take 24 to 48 hours to fully charge.
A fully charged battery supplies 12 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 battery will
recharge within 48 hours. Under normal usage batteries will last
3 to 5 years.
To obtain maximum battery life and prevent damage,
disconnect the battery when motor unit is unplugged for an
extended period of time.
NOTE: Door operation may be limited until battery is fully
charged. The motor unit’s lights will not turn on during battery
mode.
Battery Status LED