First alert smoke alarm green light blinking

Model SA511 3055574. Printed in Mexico. M08-0194-000 Q 03/07. IMPORTANT! PLEASE READ CAREFULLY AND SAVE. This user’s manual contains important information about your Smoke Alarm’s operation. If you are installing this Smoke Alarm for use by others, you must leave this manual—or a copy of it—with the end user.

present in other areas. The Smoke Alarm will only indicate the presence of smoke that reaches the sensor. The Smoke Alarm is not designed to sense gas, heat or flames. All BRK® and First Alert® Smoke Alarms conform to regulatory requirements, including UL217 and are designed to detect particles of combustion.Feb 4, 2016 · Red Blinking Power Indicator every 6 minutes: Confirms that the Smoke Alarm is receiving power All First Alert® Smoke Alarms conform to regulatory requirements, including UL217 and are designed to detect particles of combustion. Smoke particles of varying number and size are produced in all fires.Learn why the NFPA recommends that smoke alarms be replaced every 10 years (at least). About alarm life expectancy / expiration. ... Learn about 10-year-battery alarms offered by First Alert and BRK. General Help. Alarm Battery Drawer Won't Close. Learn how to fix an alarm battery drawer that won't close.There are a few possible reasons why your smoke detector may be flashing red and green, and it's best to fix it right away. Batteries. If your smoke alarm has a blinking red light, it's probably a good idea to change the batteries. This could be as simple as swapping out a 9-volt battery, or it might mean you need to purchase a new, higher quality battery.Are you an employee? Login here. Loading

It is important to know the difference between the beeps or chirps. Refer to your alarm's user manual for your specific model. 4 beeps and a pause: This means that there is carbon monoxide in the air and you should seek fresh air immediately and call 9-1-1. 1 beep every minute: This means that the detector has low batteries and you should ...This First Alert Hardwired Smoke Alarm comes with a 10 year limited warranty and complied with UL217 Standards. Save additionally with the option to bundle. ... AC and AC/DC units will have a power indicator light (red or green) that shines continuously when they are receiving electrical power. If you have a 10-Year model, the smoke alarm may ...Nov 23, 2022 · Even those models that do both jobs (smoke and CO2) should have green, yellow and red lights. When the green light is blinking on your carbon monoxide detector, it means all is well, and the device is working. Your CO2 monitor light should always be green.SKU: 0827B. 4.6 / 5.0. (6955 Reviews) WHERE TO BUY. The First Alert 0827 Sealed Ionization Smoke Alarm features a 10-year sealed lithium battery, eliminating the need for battery replacements during the lifetime of the alarm. This fire detector with ionization sensor has a tamperproof design, a mute feature, a power LED and alarm indicator, end ...Honeywell Smoke Detector Flashing Green. If you have a Honeywell smoke and heat detector, here are the situations where the green will blink: when the unit is first powered up, such as when you install the battery. the green light will flash every 10 seconds when it is in the standby or normal mode.

The First Alert BRK SC7010BVA Hardwired Talking Photoelectric Smoke and Carbon Monoxide Alarm detects both carbon monoxide and smoke all in a single device. The 120-volt CO smoke alarm features a photoelectric smoke sensor and electrochemical carbon monoxide sensor for complete peace of mind. The voice warning alerts you to the type of danger ...Find more information about your First Alert or BRK product, including manuals, tutorials, and more. Loading. ... Learn what to do if your smoke alarm is chirping even after you install new batteries. About our 10-Year Battery Alarms. Learn about 10-year-battery alarms offered by First Alert and BRK.Red Blinking Power Indicator every 6 minutes: Confirms that the Smoke Alarm is receiving power. All First Alert ® Smoke Alarms conform to regulatory requirements, including UL217 and are designed to detect particles of combustion. ... Dual Power indicator light and Alarm indicator: Green LED provides visual indication of an Alarm Memory ...This user’s manual contains important information about your Smoke Alarm’s operation. If you are installing the Smoke Alarm for use by others, you must leave this manual — or a copy of it — with the end user. Models 9120 Printed in Mexico 9120B M08-0134-003 K1 04/07 All First Alert® and BRK® Smoke Alarms conform to regulatoryLow Battery: The most common cause of a blinking light on a smoke detector is a low battery. When the battery power decreases, the smoke detector’s indicator light starts flashing to notify you that the battery needs to be replaced. It’s crucial to address this promptly by replacing the battery with a fresh one.

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If your smoke detector has a blinking red light that flashes every 10 seconds, it means that it is reacting from the after-effects of smoke and is in a temporary desensitized state. When the smoke is no longer heavy in the air, the smoke detector should silence its alarm and the red light will start blinking.Some alarms have a red or green light that blinks every few minutes, while other models blink rapidly or shine a solid light. The light isn't a cause for concern unless the alarm is also beeping or chirping. The light may change color after latch mode. To reset the light on your alarm back to default mode, press the Test/Silence button and ...First Alert Ac Smoke Alarm With Battery Backup. Help My Hard Wired Smoke Detectors Green Light Is Blinking Retrofitla. First Alert Onelink Safe Sound Review Pcmag. Blinking Green Light On First Alert Smoke Detector Is It Serious Fire Safety Support. Product Sc7010lblv. Secureshot First Alert Smoke Detector Camera Dvr W Nightvision 1 Year ...When the Smoke Alarm is activated, the same red light flashes on a regular basis. Why does my First Alert smoke alarm turn green? A green light flashing is a common part of the power cycle. The red light flashes on carbon monoxide alarms on First Alert® to indicate that the Carbon Monoxide Alarm is receiving battery power properly.

Are you an employee? Login here. LoadingThis Alarm must have AC or battery power to operate. If the AC power fails, battery back-up will allow the alarm to sound for at least 4 minutes. If AC power fails and the battery is weak, protection should last for at least 7 days. If AC power fails and the battery is dead or missing, the alarm cannot operate.While the cannabis industry is facing headwinds, there are still some hidden gems capable of delivering hefty returns. Here are the cannabis stocks that can light up your portfolio...Blinking red lights are fairly common in smoke detectors, and it should be easy for you to discover why yours is doing the blinking. 1. Batteries are Low. Many First Alert smoke detectors have an LED light, which blinks red when the batteries need to be changed. In addition, a chirping or beeping noise may be heard.During an alarm, you will hear a loud, repeating horn pattern: 3 beeps, pause, 3 beeps, pause. - Silencing the low battery warning. This user manual provides all the information (according to the table of contents) from First Alert about the 3120B AC Powered Photo and Ion Smoke Alarm with Battery Back-Up and Silence.In hardwired mode, standard is Green LED ON, Red LED Flashing 1/minute. If the green is blinking 2 seconds on / 2 second off but it's not making noise, it's in "latching" mode. That means the detector went off but the smoke condition cleared so it stopped beeping... but the green light continues to blink to show that it did go off at one time.When your alarm detects smoke in your home, the alarm will beep three (3) times in a loud, repeating pattern. First Alert alarms sequences are extremely loud at 85 decibels. This industry-standard alarm setting ensures that even people who are asleep will be alerted to emergencies. If your smoke alarm detects smoke, it will sound a very loud, 3 ...A blinking projector screen is, at best, a minor annoyance, and, more often than not, a complete distraction that makes it hard for viewers to focus on the content of your presenta...Shop First Alert 10-Year Battery Hardwired Combination Smoke and Carbon Monoxide Detector with Voice Alert in the Combination Smoke & Carbon Monoxide Detectors department at Lowe's.com. ... identifies which unit is\Nin low battery condition by blinking the green power light. Alarm also includes a\Nsingle test/silence button to test alarm ...How to Stop False or Nuisance Smoke Alarms. Learn More > Alarm Chirps with New Battery. Learn More > Troubleshoot Smoke Alarm Chirping. Learn More > ... Learn More > Need more help? Email us. Give us a call. First Alert Consumer Support. Hours of Operation: Mon-Fri (9am - 8pm CT) Sat-Sun (9am - 5:30pm CT) 1-800-323-9005. Onelink & Smart Home ...

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26/03/2021 · Most smoke detectors, the green LED is used for indicating power status. With my smoke detector (Kidde brand), flashing green means low battery or no batteries installed. With constant green, it means AC power connected. It will blink green every 60 seconds if AC disconnected, powered by batteries.Learn why the NFPA recommends that smoke alarms be replaced every 10 years (at least). About alarm life expectancy / expiration. ... Learn about 10-year-battery alarms offered by First Alert and BRK. General Help. Alarm Battery Drawer Won't Close. Learn how to fix an alarm battery drawer that won't close.Why Is The Red Light Blinking On My First Alert? There are a few common reasons why the red light may be blinking on a First Alert smoke or carbon monoxide detector: Low Battery Indication - If the red light is blinking about once every 30-60 seconds, this typically signals low battery power. Replace batteries immediately to restore normal ...Mar 17, 2023 · The green color typically serves as an indicator of normal operation, which should alleviate any worry that there is something wrong with the device. Depending on the type of smoke detector, it might take up to 30 seconds for the light to start blinking after installation or after a change in battery power. However, if all that you hear or see ...Noise Output: 85 dB in a T3 Pattern. Single Button: One press to silence and test alarm. Easy Installation: Quick-Connect wiring for easy installation. Standards: UL 217, UL 2034 and UL 1971 for visual signal devices. Warranty: 10 Year Limited. Product Dimensions (LxWxH): 5.5 x 3 x 5.5.in. Product Weight: .87 lbs.Specifications. Documents. The Kidde i12010S is an AC/DC powered, ionization smoke alarm that operates on a 120V power source with sealed-in lithium battery backup. This alarm uses ionization sensing technology. Ionization sensing alarms may detect invisible fire particles (associated with flaming fires) sooner than photoelectric alarms.Documents. The Kidde i12080A is an AC/DC powered, ionization smoke alarm that operates on a 120V power source with 9V battery backup. The i12080A includes a quick connect wiring harness for easy installation. The safety light illuminates to guide you to safety. This smoke alarm is available in a 6-piece cut case with tray for easy display.

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View and Download First Alert P910 user manual online. SMOKE AND FIRE ALARM 10 YEAR SEALED BATTERY OPERATED PHOTOELECTRIC SMOKE ALARM WITH SILENCE FEATURE. P910 smoke alarm pdf manual download. ... Green LED flashes 3 times every 43 seconds for. ... 10 year sealed battery operated photoelectric smoke alarm with silence and escape light (2 pages)The First Alert PRC710 Slim Photoelectric Smoke and Carbon Monoxide Alarm with 10-Year Battery helps protect your home from two potentially deadly threats by providing up to a decade of uninterrupted monitoring. Equipped with dual sensors, this low-profile alarm detects smoke from slow-burning, smoldering fires.This user’s manual contains important information about your Smoke Alarm’s operation. If you are installing the Smoke Alarm for use by others, you must leave this manual — or a copy of it — with the end user. Models 9120 Printed in Mexico 9120B M08-0134-003 K1 04/07 All First Alert® and BRK® Smoke Alarms conform to regulatoryOct 12, 2023 · When your smoke alarm restarts, check if the green light is on or not. Poor Shelf-Life of Alarm: Source: family handy man. If the alarm’s light isn’t green, and it sounds every 30 seconds, it’s time to get a new alarm. Solution: Install A New Alarm. Replacing a hardwired smoke detector is quite easy. You can go through these steps to ...Fire alarms are an essential safety feature in any home or commercial building. They provide early detection of smoke and fire, allowing occupants to evacuate quickly and preventin...A blinking green light on a smoke detector typically indicates that the battery is dying. Smoke detectors can either have a green or red light that indicates when the batteries are low. In some cases, a smoke detector has a green light that only blinks after the power goes out or circuit breaker trips.First Alert Ac Smoke Alarm With Battery Backup. Help My Hard Wired Smoke Detectors Green Light Is Blinking Retrofitla. First Alert Onelink Safe Sound Review Pcmag. Blinking Green Light On First Alert Smoke Detector Is It Serious Fire Safety Support. Product Sc7010lblv. Secureshot First Alert Smoke Detector Camera Dvr W Nightvision 1 Year ...After replacing the battery in your fire alarm, encountering a blinking red light might be perplexing. Several factors could contribute to this unexpected behavior, including: A. Improper Battery Installation: Incorrect Orientation: The battery might have been inserted incorrectly, leading to improper contact and triggering a fault signal.Remove The Battery: First, you will be needing to take out the old batteries to reset both the smoke alarm and the red light. Take out the outer casing and find the battery tray, and then you will find a lever, pop the lever to open the battery tray. After that, remove the old battery from the smoke detector.First Alert PC1200 User Manual View and Read online. TROUBLESHOOTING GUIDE. TESTING & MAINTENANCE. IF YOUR SMOKE/CO ALARM SOUNDS. Est. reading time 15 minutes. PC1200 Smoke Alarm manuals and instructions online. Download First Alert PC1200 PDF manual.Sep 5, 2023 · This user’s manual contains important information about your Smoke Alarm’s operation. If you are installing the Smoke Alarm for use by others, you must leave this manual — or a copy of it — with the end user. Models 9120 Printed in Mexico 9120B M08-0134-003 K1 04/07 All First Alert® and BRK® Smoke Alarms conform to regulatory ….

Erratic or low sounds coming from your smoke alarm may indicate a fault in the alarm. Check your warranty and if within the warranty period, contact product support for warranty replacement. Product Support can be reached at 1-800-880-6788 Monday through Friday 8:00am - 8:00pm EST and Saturday 9:00am - 3:00pm EST.Remove the smoke alarm from the mounting bracket and disconnect the power. Remove the battery (for a sealed-battery model, see Battery Settings for a 10-Year Alarm to learn more). Press and hold the test button for five seconds. Reconnect the power and reinstall the battery. NOTE: The unit will chirp once when the power is restored, but should ...Improve your home's safety and storage with smoke alarms, CO detectors, door locks with alarms, vent fans, and kitchen cabinets. Find inspiration here! Expert Advice On Improving Y...A blinking red light on a First Alert Smoke Alarm typically signals that the device is functioning properly; nonetheless, it’s critical to adhere to specific cleaning and care practices to prevent false alarms. Dust and debris can easily interfere with the sensors, so a gentle vacuuming using a soft brush attachment or blowing compressed air ...Please take the time to read this manual and make. this Smoke Alarm an integral part of your family's safety plan. Key Features of the SA320 Photo & Ion Combo Smoke Alarm: Photo & Ion Smoke Sensors: Dual photoelectric and ionization smoke. sensing technologies for optimal sensing of smoke particles produced in.View and Download First Alert SC9120B user manual online. Smoke & Carbon Monoxide Alarm. SC9120B security system pdf manual download. ... SMOKE ALARM Light (RED) 3. CO ALARM Light (RED) 4. Battery Drawer. 5. ... unit continues to flash the green light once a minute for 8 hours. After. 8 hours, ...This user’s manual contains important information about your Smoke Alarm’s operation. If you are installing the Smoke Alarm for use by others, you must leave this manual — or …Oct 12, 2023 · On the other hand, the red light is the alarm signal. When your smoke detector’s light turns red, it’s time to act swiftly and ensure your safety. It means that smoke or fire has been detected, and the alarm may sound any moment. In such a scenario, your immediate response is vital. Why Smoke Detectors Have Indicator Lights. Smoke …Smoke alarms may alarm briefly when power is interrupted, then restored. Power interruptions are common in areas where utility companies switch grids in the early hours of the morning. A loose electrical connection on AC or AC/DC smoke alarms. In AC or AC/DC smoke alarms, a loose hot wire connection can intermittently disconnect power to the ...Why is the green power light flashing on my First Alert plug-in carbon monoxide alarm? With all First Alert plug-in carbon monoxide alarms, any time there is a power outage, brownout, surge or other problem with the power, the alarm goes through a power up cycle. The flashing on your plug-in carbon monoxide alarm should stop after 5 minutes ... First alert smoke alarm green light blinking, First Alert Ac Smoke Alarm With Battery Backup. Help My Hard Wired Smoke Detectors Green Light Is Blinking Retrofitla. First Alert Onelink Safe Sound Review Pcmag. Blinking Green Light On First Alert Smoke Detector Is It Serious Fire Safety Support. Product Sc7010lblv. Secureshot First Alert Smoke Detector Camera Dvr W Nightvision 1 Year ..., Summary of Contents for First Alert SC9120B. Page 1 Smoke larm Models 9120, 9120B, SC6120B, Consumer ffairs: (800) 323-9005 • Connect the white wire on the power connector to the neutral SC9120B, 7010, 7010B, 7020B, SC7010B, SC7010BV, 100S, 4120, www.brkelectronics.com • www.firstalert.com Smoke larm is Silenced wire in the …, April 17, 2023. Smoke detectors often have two coloured lights – a green light and a red light. The green light on a smoke detector typically indicates that the device is receiving power and functioning correctly. It may flash intermittently to confirm that the device is operating correctly. On the other hand, the red light is usually a ..., First Alert Smoke Alarm Blinking Green Light And Beeping What Does a Blinking Green Light and Beeping Sound Mean? When a First Alert smoke alarm blinks green and beeps, it usually indicates a low battery. This is a common occurrence that requires immediate attention. A low battery can compromise the effectiveness of your smoke alarm and prevent ..., Alarms should be placed between 4 inches (102 mm) and 12 inches (305 mm) from the wall/ceiling line, below typical "dead air" spaces. On a peaked, gabled, or cathedral ceiling, install the first Smoke Alarm. within 3 feet (0.9 meters) of the peak of the ceiling, measured horizontally., "The smoke alarm is over in the (room name)." Listen to it now: Pulsing green light ring. Smoke clearing • (room name). The smoke level is decreasing. Conditions are returning to normal. Make sure you're safe and have put out the source of smoke. "The carbon monoxide alarm is over in the (room name)." Listen to it now: Pulsing green light ring, alarm open a window or fan the smoke away from the unit. The alarm will reset automatically when it returns to normal operation. Never remove the batteries from a battery operated unit to stop an unwanted alarm (caused by cooking smoke, etc.). Instead open a window or fan the smoke away from the unit. The alarm will reset automatically., Here are some potential reasons for a green flashing smoke detector: 1. Low Battery. One of the most common causes of a green flashing smoke detector light is a low battery. When the battery power is running low, the smoke detector may emit a flashing green light to alert you to replace the battery., Please take the time to read this manual and make. this Smoke Alarm an integral part of your family's safety plan. Key Features of the SA320 Photo & Ion Combo Smoke Alarm: Photo & Ion Smoke Sensors: Dual photoelectric and ionization smoke. sensing technologies for optimal sensing of smoke particles produced in., Reset. If the red blinking light on your first alert smoke alarm is flashing nonstop, it could be a sign of something more serious. This could be a power outage, low battery, or a weak or missing signal. If it's a battery-powered device, changing the batteries should fix the problem. Most smoke detectors emit a low-battery chirp or beep and ..., Always discharge the branch circuit before servicing an AC or AC/DC Smoke Alarm. First, turn off the AC power at the circuit breaker or fuse box. Next, remove the battery from Smoke Alarms with battery back-up. Finally, press and hold the test button for 5-10 seconds to discharge the branch circuit., Jun 17, 2023 · Clean the Smoke Alarm: If the green flashing light persists, it could be due to sensor obstruction or contamination. Carefully clean the smoke alarm using a soft brush or a vacuum cleaner with a brush attachment. Gently remove any dust, debris, or particles that may be interfering with the sensors’ functionality., One of the most common problems with First Alert Wireless Smoke Detectors is that they don't seem to detect smoke when there is a fire. The detector needs two minutes of exposure to smoke before it will set off an alarm. If you're not getting an alarm and you think there's a problem, try moving it around the house or checking the ..., This type of chirp means that smoke has been detected in your home. You and your family need to evacuate and call 9-1-1 once safely outside. Low Battery or End-of-Life: This type of chirp indicates it is time to replace your smoke alarm's batteries or the smoke alarm itself. Refer to your smoke alarm's user manual for the specific beeps based ..., This type of chirp means that smoke has been detected in your home. You and your family need to evacuate and call 9-1-1 once safely outside. Low Battery or End-of-Life: This type of chirp indicates it is time to replace your smoke alarm's batteries or the smoke alarm itself. Refer to your smoke alarm's user manual for the specific beeps based ..., Latch: Identifies which unit is in low battery condition by blinking the green power light. Low Battery Silence: Temporarily silence the low battery chirp for up to eight ... Up to 18 units of First Alert or BRK Smoke, CO and Heat Alarms. Maximum of 12 smoke alarms. See user's manual for details. Smoke Sensors: Photoelectric and Ionization, Nov 15, 2023 · Here are the three common reasons why your smoke detector is blinking green. 1. The power status. The smoke detectors mostly use green light to indicate the device’s power status. If it blinks every two seconds, the battery is dying. You can remove the smoke detector to replace the batteries in such cases., chirps and its Green power LED stops blinking. Then release the test button. ... First alert sa520 smoke alarm with battery back-up (2 pages) ... Smoke alarm with silence and escape light features (6 pages) Smoke Alarm First Alert SA320 User Manual. Battery powered photo & ion smoke alarm (7 pages), Oct 12, 2023 · Here are the steps to reset your smoke detector: Switch the circuit breaker off from the panel. Remove the alarm from its stand and unplug the power cable or batteries. Press the test button and hold it down for approximately 15 seconds. Reconnect the power source and turn on the smoke alarm., Dying Battery. The most common reason that a smoke alarm can go off briefly and stop is if the battery is dying. Smoke detector batteries last for 15 months on average, but they can go bad in as little as 12 months. A weak battery can affect how your smoke detector operates, and it can cause the alarm to go off for a few seconds., A flashing green light is a normal part of the power up cycle. On First Alert® carbon monoxide alarms, the red light flashes to show the Carbon Monoxide Alarm is properly receiving battery power. If you do not see the red light flashing, change the batteries in the alarm immediately., Troubleshooting the red light on your First Alert smoke alarm is crucial for maintaining a reliable home safety system. To deal with typical problems, follow these steps: Replace Batteries: If you notice a blinking red light, it's often due to low batteries. Replace them promptly, and ensure you use high-quality, long-lasting batteries., A flashing green light on smoke detector generally indicates normal operation. But functionality meaning varies among brands like Kidde, First Alert and Nest Protect. Check your owner's manual when first noticing a blinking light. Consistently performing maintenance like testing and replacing batteries ensures many years of reliable service., Activate The P1210 Sm210 Alarm. First Alert 7010b Hardwired Photoelectric Smoke Alarm With Battery Backup. First Alert 10 Year Battery Hardwired Ionization Sensor Smoke Detector In The Detectors Department At Lowes Com. First Alert Brk 9120b Hardwired Smoke Alarm Detector White New 689744101497., If the Green power indicator light does not light, TURN OFF POWER TO THE. its sensing chamber, it alarms. ... Green LED ON; flashing. No Audible Alarm (AC Power) Red LED once/ minute. Normal Operation. ... First alert smoke alarm - fire smoke detector user manual (8 pages), Nov 23, 2022 · Even those models that do both jobs (smoke and CO2) should have green, yellow and red lights. When the green light is blinking on your carbon monoxide detector, it means all is well, and the device is working. Your CO2 monitor light should always be green., Summary of Contents for First Alert SC9120B. Page 1 Smoke Alarm Models 9120, 9120B, SC6120B, Consumer Affairs: (800) 323-9005 • Connect the white wire on the power connector to the neutral SC9120B, 7010, 7010B, 7020B, SC7010B, SC7010BV, 100S, 4120, www.brkelectronics.com • www.firstalert.com Smoke Alarm is Silenced wire in the …, Activate The P1210 Sm210 Alarm. First Alert 7010b Hardwired Photoelectric Smoke Alarm With Battery Backup. First Alert 10 Year Battery Hardwired Ionization Sensor Smoke Detector In The Detectors Department At Lowes Com. First Alert Brk 9120b Hardwired Smoke Alarm Detector White New 689744101497., Learn why the NFPA recommends that smoke alarms be replaced every 10 years (at least). About alarm life expectancy / expiration. ... Learn about 10-year-battery alarms offered by First Alert and BRK. General Help. Alarm Battery Drawer Won't Close. Learn how to fix an alarm battery drawer that won't close., The First Alert Combination Smoke and Carbon Monoxide Alarm integrates with existing wiring and features a universal mounting bracket that makes installing the unit quick and easy. The side-load battery compartment makes changing the 9-volt battery simple. Tamper-resistant locking pins prevent unauthorized disabling of the CO smoke alarm., Learn why the NFPA recommends that smoke alarms be replaced every 10 years (at least). About alarm life expectancy / expiration. ... Learn about 10-year-battery alarms offered by First Alert and BRK. General Help. Alarm Battery Drawer Won't Close. Learn how to fix an alarm battery drawer that won't close., View the First Alert 9120B6CP manual for free or ask your question to other First Alert 9120B6CP owners. Manua. ls. Manua. ls. First Alert smoke detectors · First Alert 9120B6CP manual. 7.5 · 1. give review. PDF manual · 7 pages. English. manual First Alert 9120B6CP. ... Understanding the Indicator Lights., AC and AC/DC units will have a power indicator light (red or green) that shines when they are receiving electrical power. If you have a 10-year model, the smoke alarm may not have been properly activated. If the tab broke away before the alarm was activated, you can use a toothpick to move the switch over to test the alarm.