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LiftMaster LM21XPBB Support Question

LiftMaster LM21XPBB Support Question

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Question posted by danielraymond38 on May 29th, 2021

Battery Was 9 Years Old, I Replaced But Continued To Beep. What Could That Be?

replaced 9 year old battery but continues to beep

Current Answers

Answer #1: Posted by Odin on May 29th, 2021 9:52 AM
This answer was accepted by the poster of the original question.
Odin

Member since:
April 10th, 2010

Points: 41,236,680
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Could be a faulty battery. Check the chart at https://www.manualslib.com/manual/442913/Chamberlain-Liftmaster-Lm21xpbb.html?page=13#manual for the LED color.

If the issue persists or if you require further advice, you may want to consult the company: use the contact information at https://www.contacthelp.com/liftmaster/customer-service.


Hope this is useful. Please don't forget to click the Accept This Answer button if you do accept it. My aim is to provide reliable helpful answers, not just a lot of them. See https://www.helpowl.com/profile/Odin.
Answer #2: Posted by SonuKumar on May 29th, 2021 10:16 AM
SonuKumar

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Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful.

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Related LiftMaster LM21XPBB Manual Pages

LM21XPBB Manual - Page 1

The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.liftmaster.com OWNER'S MANUAL MODELS LM21XPBB LM21XPBBVB EXTENDED PERFORMANCE RELEASE DEVICE APPROVED
LM21XPBB Manual - Page 2

...for up to four smoke detectors and two horn strobes, as well as provide battery backup for use on the following pages, it will alert you to the fire... see these Safety Symbols and Signal Words on rolling doors, single-slide and center-parting level and inclined track doors. INTRODUCTION GENERAL DESCRIPTION The LiftMaster® LM21XPBB and LM21XPBBVB Release Device is UL/ULC listed normally ...
LM21XPBB Manual - Page 3

... and fire standards, guidelines, regulations and codes including, but not limited to the door manufacturer's recommendations for use this device without fusible links installed. • Test every...ALARM CURRENT BATTERY RATING: BATTERY STANDBY TIME: 120Vac, 60Hz; 24Vac, 60Hz; 24Vdc .06A, .3A, .2A .06A, .3A, .25A 12V 4.5AH Sealed Lead Acid Battery, Maximum charge current .150Amps LM21XPBB, 72 ...
LM21XPBB Manual - Page 4

... end link completely in accordance with fasteners (#10 is the minimum size recommended). End Link MOUNT THE RELEASE DEVICE Installation procedures vary according to your door. 1. If installing in masonry, use this device without fusible links installed. 4. CIÓN ADVERTENCIA 4. NING ON I N S TA L L AT I O N WARNING IMPORTANT INSTALLATION INSTRUCTIONS WARNING To reduce...
LM21XPBB Manual - Page 5

... protected. Power Strip Ground L2 L1 AVERTISSEMENT ENCIA ADVERTENCIA ATTENTION 5. A pulsing sounder occurs when the battery is disconnected or when replacement is under power, the door will drop. WARNING ON WIRING INSTRUCTIONS Verify wiring configuration with specific door and To prevent DAMAGE to power capacity requirements and circuit length and wiring methods. When powering...
LM21XPBB Manual - Page 7

... 4. Speaker BK BK 12 V, 4.5 AHr Battery 2 Amp maximum current RD GR L3 L2 L1...Door Proximity Switch (2) (optional) Input Power 120 Vac .5 Amp + 24V ac/dc OR Hot Neutral - 0.75 Amp Ground EOL 10 kOhm Resistor (LMEOLRES10) 2-Wire Detector Initiation Loop (1) (3) Place 10 kOhm resistor between 3 & 4 if unused + In + Out - WIRING DIAGRAM WIRING Solenoid Replace batteries every 2 years...
LM21XPBB Manual - Page 8

... • DO NOT install this device on a motorized door without an electric safety edge. Observe proper polarity, 3 ...device, such as an approved UL1481 regulated power supply providing battery backup support. (-) Power from Control Panel NOTE: Generic version... 10k Ohm @1/2 watt Supervisory Resistor (LMEOLRES-10) Normally Open "2-Wire," Class B Style A Initiating Devices Connect wiring from...
LM21XPBB Manual - Page 9

... by the fire alarm control panel. Connect wiring from its N/O condition (switch closed when door is in this manner. If these features are desired, coordinate the interconnection between positions 9... specifications and the Authority Having Jurisdiction ADVERTENCIA 15 Trouble Common Connect wiring from the door, the release device will be released. This is available to the unit, the...
LM21XPBB Manual - Page 10

... SWITCH SELECTION The release device will close ; ON 1 2 3 4 Factory default setting of either message. Message 2: Warning tone followed by the verbal warning message). This fire door will provide a factory default delay of the delay chosen on the length of 10 seconds (to minimize nuisance alarms) before applying power to decrease volume...
LM21XPBB Manual - Page 11

...release device and disconnect battery. All tests may not apply. Reset the door per door manufacturer's instructions. Depress and continue to hold test button on the device and release the Mechanical Reset Plunger in it's normal position (open position. Reset the door per door manufacturer's instructions. Fully insert the end link through door opening while testing. • Test...
LM21XPBB Manual - Page 12

... (See Wiring Diagram). There should be replaced. Red (LED 4) If lit, indicates an open ) within the N/O 2-wire (or 4-wire) smoke detector loop (emanating from terminal board positions 3 and 4), resulting from the unit. If in alarm. No Check power connections per manufacturers' instructions. ATTENTION 3. If so, the battery is not functioning properly and a trouble...
LM21XPBB Manual - Page 13

... required for proper operation and protection of door. • Disconnect ALL electrical and battery power BEFORE performing maintenance. The fuse is kept in dry, indoor locations. BATTERY DISPOSAL Spent batteries must be treated as shown on the wiring diagram. This indicates the need to Accessory and Replacement PAartsVpaEgeR. Power Red If the Red LED is...
LM21XPBB Manual - Page 14

ACCESSORIES AND REPLACEMENT PARTS ITEM PART # 1 LM8100 2 LM8100T 3 LM8100I 4 LM2WB 5 LM2WTB 6 LM4WB 7 LM4WTB 8 LM1424 9 LM1412...Relay - 12/24Vdc End-of-Line Relay - 120Vac REPLACEMENT PARTS ITEM PART # 1 LMRK 2 LMELH 3 LM2AG3AMP 4 LMEOLRES10 5 LM4AH12 DESCRIPTION Reset Knob End Link Fuse - 3Amp End-of-Line Resistor, 10 kOhm Battery NOTE: Certain accessories above will require a separate power ...

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