First alert model co606 5 beeps

First Alert manufactures both ionization and photoelectric smoke alarms, and they beep when they detect small and large smoke particles, respectively. Small particles typically com...

First alert model co606 5 beeps. Product Details. Power Source: Plug in. Sensor: Electrochemical. Single Button: One press to silence and test alarm. End of Life Timer: Alarm chirps when it is time to replace it. Noise Output: 85 dB in a T4 Pattern. Standards: UL 2034. Warranty: 7 Year Limited. Product Dimensions (LxWxH): 5 x 1.7 x 3.4 in.

in “dead air” space and carbon monoxide may not reach the sensor. NOTE: Do not cover the Alarm with a curtain. To install for a wall-mount, you will need to pull out the removable. adapter and power cord, as follows: 1. Repeat steps 1 to 3 as described above in. “to rotate the adapter”. 2.

Online Manuals for Popular Models. Review the chart to find manuals for common First Alert, Onelink, and BRK products. If your model isn’t listed here, follow the steps in the previous section to locate it. Model: User’s Manual: 1039102. 1039102 manual. 1042136. 1042136 manual. 1042135.Insert the screws but tighten them only about halfway. Attach the mounting bracket to the screws and rotate the bracket into place. Secure the bracket in place by tightening the screws. Remove the battery pull-tab from the alarm. Position the base of the alarm onto the bracket and turn it clockwise until it’s secured. Optional security step:4. Using a 3/16” (5 mm) drill bit, drill a hole through the center of the oval outlines you traced. 5. Insert the plastic screw anchors (in the plastic bag with screws) into the holes. Tap the screw anchors gently with a hammer, if necessary, until they are flush with the ceiling or wall. 6.First Alert smoke alarms are designed to alert you and your family to the presence of smoke in your home. Carbon monoxide (CO) alarms alert you to unwanted and potentially deadly levels of CO. Unlike smoke, carbon monoxide is a colorless, odorless, tasteless gas, which makes a detection device essential for the health and safety of people and ...HORN: Sounds loudly - 4 beeps, pause, 4 beeps, pause. This sequence repeats for as long as the unit is in alarm. POWER/ALARM LIGHT: Flashes rapidly IF YOU SILENCE THE ALARM: HORN: Silent for about 4 minutes LIGHT: Flashes rapidly Note: After 4 minutes, if CO levels drop below alarm levels, the unit will remain silent and return to normal operation.

First Alert Carbon Monoxide Detector CO606 - Download as a PDF or view online for free ... 4 beeps, a pause, 4 beeps, etc. Press and hold the Test/Silence button until the horn is silent. The initial Silence cycle will last approxi- mately 4 minutes. ... Model CO606 LISTED TO UL 2034 STANDARD DIRECT PLUG ALARM INTO AN …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 Support. Hours of Operation:Note: First Alert smoke alarm requires 9V or AA batteries.. Here is how to replace the battery: Unplug the alarm from the power.; Dismount the alarm from the wall/ceiling. Locate the battery drawer and open it.; Take out the old batteries. Insert the new batteries and close the drawer.; Once the replacement is done, plug the alarm into …Hi everyone! This video is about how to replace the battery in a First Alert carbon monoxide alarm model CO400. I spend 30 minutes trying open the battery wh...First Alert CO606 Carbon Monoxide Alarm User Manual. Open as PDF. of 1 ... 7:30 AM to 5:00 PM, Central Standard Time, Monday through Friday. To assist in serving you, please have the model number and date . of purchase available when calling. For Warranty Service return to ... 4 beeps, a pause, 4 beeps, etc. Press and hold the Test/Silence ...Use the plastic tab to gently open the battery compartment. Remove the old battery. Look at your 9V battery to identify the positive (+) and negative (-) contacts similar to what is shown in the image. When installing the battery in your alarm make sure they match the same polarity in the battery drawer. Note: the negative side has a larger ...

60 Hz, 0.09A. Printed in Mexico M08-0152-002 S 07/07. IMPORTANT! PLEASE READ CAREFULLY AND SAVE. This user's manual contains important information about your Carbon. Monoxide (CO) Alarm's operation. If you are installing this CO Alarm. for use by others, you must leave this manual-or a copy of it-with. the end user. CO problems can occur any time during the year, and this Alarm can only alert you if it is plugged in and receiving power. This CO Alarm is intended for use in a standard, unswitched 120V AC wall outlet. It is not intended for use in extension cords, power strips, or outlets controlled by a switch or dimmer.Five beeps on a carbon monoxide alarm mean end of life, telling you it’s time to install a new alarm. Five beeps at fifteen-minute intervals is a warning that your alarm is dying. Unlike a low battery warning (one chirp), this means the entire alarm needs to be replaced. You should deal with this issue as soon as possible.Alarm Battery Drawer Won't Close. First Alert alarms have a mechanism that keeps the drawer open if the batteries are facing the wrong way. If your battery drawer won’t close properly, switch the direction of the battery or batteries. 9-Volt (9V) Battery Direction: AA-Battery Direction: Learn how to fix an alarm battery drawer that won't close.Contact the manufacturer or the retailer where you purchased the alarm. 3. Five beeps, at 15-minute intervals = END OF LIFE. The alarm has reached the end of its useful life and you must install a new one. 4. A loud steady alarm (not beeps or chirps) = EMERGENCY. The unit has detected carbon monoxide gas in your home.

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Troubleshoot Chirping on CO Alarms. What do the chirps on my CO alarm mean? Refer to the chart to learn what "chirps" or "beeps" mean on CO alarms. Troubleshoot 1 chirp, 3 …Interpretation of 5 Beeps. When your smoke detector emits a series of five beeps, it is essential to decipher the meaning behind this specific alarm sound. Here are some possible interpretations of the five beeps on a smoke detector: End of Life Warning: In some smoke detector models, a five-beep alarm could indicate an end-of-life warning ... Model: CO1210. Download product manual. Register your product. ... First Alert Consumer Support. Hours of Operation: Mon-Fri (9am - 8pm CT) Sat-Sun (9am - 5:30pm CT) Feb 24, 2024 · First Alert’s carbon monoxide detectors, such as the CO606 model, offer advanced features like electrochemical sensors, audible alarms, and digital displays. Promptly addressing 3 beeps and seeking professional help when needed are vital for home safety. 5. Peak level Button. 6. Digital Display with blue backlight. 1, 3, 5 4 6 2 UNDERSTANDING YOUR CO ALARM Display glows and horn chirps when Alarm is first activated. DIGITAL DISPLAY All segments are turned on for a short time upon initial power. Then the temperature is displayed in degrees F. ALARM RECEIVING BATTERY POWER Horn is …1 If the Alarm Signal Sounds. 2 If Your Co Alarm Sounds. 3 Replacing the Battery. 4 Testing and Maintenance. 5 Troubleshooting Guide. Download this manual. Original version. …

5 beeps every minute: This means your alarm has reached the end of its life and needs to be replaced with a new alarm. A CO alarm horn indicates an emergency situation, but in …Alarm operating Alarm operating Low / missing “Err” Alarm is on AC power on emergency battery warning not operating battery back-up properly. During Testing, the display flashes "30, 70, 150, 400" briefly. During initial power up display flashes "888" briefly. Levels of CO shown in ppm if present.An unofficial test of a First Alert Model CO606 Carbon Monoxide Detector. After I made this video, I found another video which confirmed my findings. http://... Battery Backup: 9V. Sensor: Electrochemical. Single Button: One press to silence and test alarm. End of Life Timer: Alarm chirps when it is time to replace it. Noise Output: 85 dB in a T4 Pattern. Standards: UL 2034. Warranty: 7 Year Limited. Product Dimensions (LxWxH): 5 x 1.38 x 3.4 in. Product Weight: 1.1 lbs. Remove the old batteries. Press and hold the Test/Reset button for 10 seconds to fully discharge the detector. Insert the new batteries, and make sure the contact points are facing the right direction. Close the battery drawer and remount your unit. Learn how to replace the batteries in a smoke or CO detector.If your smoke alarm is chirping even though it has a new battery, try these troubleshooting steps to clear out residual charge from the old battery. Remove the alarm from your ceiling or wall. Open the cover and take out the battery. Press and hold the test button for 15-30 seconds. This will fully reset the smoke alarm and drain any charge ...User manual. First Alert CO606 User Manual. 120v plug-in carbon monoxide alarm with battery back-up and silence feature. Also See for CO606: User manual (1 page) , User manual (2 pages) , User manual. • Within 5 feet (1.5 meters) of any cooking appliance. • In extremely humid areas. This Alarm should be at least 10 feet (3 meters) from a bath or shower, sauna, humidifier, vaporizer, dish-washer, laundry room, utility room or other source of high humidity. • In areas where temperature is colder than 40˚ fF (4.4˚ C) or hotter First Alert has a complimentary disposal program for up to 4 intact ionization smoke detectors (postage not included). These must be First Alert, BRK, Family Gard, or Onelink brand. If you have more than 5 detectors, we can help you dispose of them for a small fee. For detailed information on our disposal program, please fill out our Customer ...(RTTNews) - Shares of Triterras, Inc. (TRIT) are continuing its upward trend, gaining over 20% on Thursday morning. TRIT is currently trading at... (RTTNews) - Shares of Triterra...

4.7 / 5.0. (18080 Reviews) WHERE TO BUY. The First Alert CO606 Carbon Monoxide Plug-In Alarm with battery backup features an electrochemical CO sensor to alert you to …

Summary of Contents for First Alert CO600. Page 1 USER’S MANUAL 120V PLUG-IN CARBON MONOXIDE ALARM WITH SILENCE FEATURE Model CO600 120V C CONFORMS TO 60 Hz, 0.09 UL STD 2034 IMPORT NT! PLE SE RE D C REFULLY ND S VE. This user’s manual contains important information about your Carbon Monoxide …Carbon Monoxide Alarm First Alert CO606 User Manual. 120v plug-in carbon monoxide alarm with battery back-up and silence feature (10 pages) ... Smoke/CO Alarm Model SC6120B, SC7010BV, SC7010B; and First Alert ® Smoke Alarm Models SA4120, SA4120B, SA4121B, SA4919B, SA100B. Interconnected units must meet ALL of the …UltiMaker Partner Login. Username. PasswordModel: CO1210. Download product manual. Register your product. Setup. Where should I install carbon monoxide alarms and in particular, how high off the floor? ... 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 Support.CO problems can occur any time during the year, and this Alarm can only alert you if it is plugged in and receiving power. This CO Alarm is intended for use in a standard, unswitched 120V AC wall outlet. It is not intended for use in extension cords, power strips, or outlets controlled by a switch or dimmer.HORN: Sounds loudly - 4 beeps, pause, 4 beeps, pause. This sequence repeats for as long as the unit is in alarm. POWER/ALARM LIGHT: Flashes rapidly IF YOU SILENCE THE ALARM: HORN: Silent for about 4 minutes LIGHT: Flashes rapidly Note: After 4 minutes, if CO levels drop below alarm levels, the unit will remain silent and return to normal operation.First Alert USER'S MANUAL 120V PLAX-IN CARBON MONOXIDE ALARM WITH BATTEW BACK-UP TABLE OF CONTENTS CO INTRODUCTION. IMPORTANT! "WARNING! HOW YOUR CO ALARM WORKS *FORMATION AcauT10M to MALFUNCTION WARN*a THE PARTS OF YOUR CO ALARM UNDERSTANDINO YOUR CO INSTALLATION TO INSTALL CO 2 CO "WARNING! WHERE CO ALARMS SHOULD NOT BE INSTALLED DO NOT ...Kidde fire alarms are an essential part of any home’s safety system. They are designed to alert residents in the event of a fire and provide valuable time to evacuate safely. Howev...Model: 3120B. Download product manual. Register your product. Buy now. Setup. Why Replace Smoke Alarms Every 10 Years? ... 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 Support.

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SKU: 3120B. 4.4 / 5.0. (2442 Reviews) WHERE TO BUY. The First Alert® Hardwired Dual Sensor Smoke Alarm with Battery Backup is designed to provide peace of mind. The photoelectric and ionization sensors alert you to both smoldering and fast-flaming fires, offering comprehensive detection and early warning. The 85-decibel fire alarm can also ...Interpretation of 5 Beeps. When your smoke detector emits a series of five beeps, it is essential to decipher the meaning behind this specific alarm sound. Here are some possible interpretations of the five beeps on a smoke detector: End of Life Warning: In some smoke detector models, a five-beep alarm could indicate an end-of-life warning ...If your smoke alarm is chirping even though it has a new battery, try these troubleshooting steps to clear out residual charge from the old battery. Remove the alarm from your ceiling or wall. Open the cover and take out the battery. Press and hold the test button for 15-30 seconds. This will fully reset the smoke alarm and drain any charge ...60 Hz, 0.09A. Printed in Mexico M08-0152-002 S 07/07. IMPORTANT! PLEASE READ CAREFULLY AND SAVE. This user's manual contains important information about your Carbon. Monoxide (CO) Alarm's operation. If you are installing this CO Alarm. for use by others, you must leave this manual-or a copy of it-with. the end user.If your digital carbon monoxide alarm says “END” on the display, this means it has reached the end of its life and needs to be replaced. The alarm will also chirp 5 times per minute to let you know it’s time for replacement. Learn more about CO Alarms: Where to Buy First Alert, Onelink, or BRK Brands Products.Model SC9120B Input: 120V AC ~ 60 Hz, 0.09A IMPORTANT! PLEASE READ CAREFULLY AND SAVE This user’s manual contains important information about your Alarm’s operation. If you are installing the Alarm for use by others, you must leave this manual — or a copy of it — with the end user. Model SC9120B Printed in Mexico M08 …PR710 10-Year Battery Slim Photoelectric Smoke Alarm. The First Alert P1210 Slim Profile Photoelectric Smoke Alarm with 10-Year Sealed Lithium Battery helps protect your home by providing up to a decade of uninterrupted monitoring. This low-profile smoke alarm uses a photoelectric sensor to detect smoke from slow-burning, smoldering fires.First Alert maintains high manufacturing standards in all of our products. First Alert, Onelink, and BRK have had no product recalls in the past decade. If a First Alert product isn't working as expected, browse our Help Center for solutions or contact our Support Team. To check product recalls for any consumer product (including First Alert ...The First Alert P1210E 10-Year Battery Photoelectric Smoke Alarm with Safety Path Light alerts you to smoke and fire emergencies and helps illuminates your path to safety. This low-profile smoke detector is half the size of a standard alarm, with a slim, contemporary design that mounts unobtrusively on a wall or ceiling.Note: First Alert smoke alarm requires 9V or AA batteries.. Here is how to replace the battery: Unplug the alarm from the power.; Dismount the alarm from the wall/ceiling. Locate the battery drawer and open it.; Take out the old batteries. Insert the new batteries and close the drawer.; Once the replacement is done, plug the alarm into …Different Types of Beeps and Chirps: 4 Beeps and a Pause: EMERGENCY. This means that carbon monoxide has been detected in the area, you should move to fresh air and call 9-1-1. 1 Beep Every Minute: Low Battery. It is time to replace the batteries in your carbon monoxide detector. 5 Beeps Every Minute: End of Life. This type of chirp indicates ...Use the plastic tab to gently open the battery compartment. Remove the old battery. Look at your 9V battery to identify the positive (+) and negative (-) contacts similar to what is shown in the image. When installing the battery in your alarm make sure they match the same polarity in the battery drawer. Note: the negative side has a larger ... ….

Learn how to install, maintain, and troubleshoot your First Alert smoke and carbon monoxide alarms. Download manuals and get support.4 beeps and a pause: This means that there is carbon monoxide in the air. You should seek fresh air immediately and call 911. 1 beep every minute: This means that the alarm has low battery power and needs a replacement. 3 beeps every minute: This means the alarm has encountered a malfunction and needs replacement.Hi everyone! This video is about how to replace the battery in a First Alert carbon monoxide alarm model CO400. I spend 30 minutes trying open the battery wh...The First Alert CO615 Dual-Power Carbon Monoxide Plug-In Alarm is designed to work with any standard electrical outlet, and it features battery backup to allow continuous monitoring of carbon monoxide levels in the event of a power outage. Simply place two AA batteries in the battery compartment, and if the power goes out, the backup will ...Hp provided this document. Computer beeps or a light blinks during startup. that said, only 5 beeps not specified. The red light blinks five times, and then two, short white light blinks (5 long red, 2 short white) This condition indicates that the embedded controller is missing valid firmware. • Within 5 feet (1.5 meters) of any cooking appliance. • In extremely humid areas. This Alarm should be at least 10 feet (3 meters) from a bath or shower, sauna, humidifier, vaporizer, dish-washer, laundry room, utility room or other source of high humidity. • In areas where temperature is colder than 40˚ fF (4.4˚ C) or hotter Boeing says it determined safety wouldn't be affected by the alert not working, and that it could fix the issue with a software update later. Some months after Boeing delivered its...Smoke alarms should be replaced 10 years from the date of manufacture. Combo smoke/CO alarms should be replaced after 5-7 years (depending on the model). Put the alarm back on the ceiling or wall if it is less than 10 years old. Replace alarm (s) older than 10 years with new units. Repeat the process with all alarms in your home. Learn more ... First alert model co606 5 beeps, Each smoke detector should be replaced 10 years after the date of installation. If you’re not sure when it was installed, check the back of the smoke detector for the manufacture date and add 10 years to it to get the expiration or replacement date. Most CO alarms expire after 7 years, so if you have a combo smoke and CO detector, you should ..., Download user manual for First Alert CO606. Learn more about Testing And Maintenance, Regulatory Information For Co Alarms, Introduction, Installation, If Your Co Alarm Sounds, What You Need To Know About Co, Troubleshooting Guide, Limited Warranty, Understanding Your Co Alarm, Weekly Testing. , Cell Phone Weather Alerts - You can receive cell phone weather alerts 24 hours a day. Learn how cell phone weather alerts work in this article from HowStuffWorks. Advertisement Whe..., First Alert is a leading brand of fire safety products, including smoke alarms, carbon monoxide detectors, and combination alarms. Learn how to protect your home and family from fire and carbon monoxide hazards, and explore different models, features, and installation guides for each product category. First Alert also offers wireless and plug-in alarms, voice and location alerts, and tamper ..., Model CO605. M08-0153-002 S 12/06 Printed in Mexico. IMPORTANT! PLEASE READ CAREFULLY AND SAVE. This user's manual contains important information about your Carbon. Monoxide (CO) Alarm's operation. If you are installing this CO Alarm for. use by others, you must leave this manual-or a copy of it-with the. end user., Five beeps on a carbon monoxide alarm mean end of life, telling you it’s time to install a new alarm. Five beeps at fifteen-minute intervals is a warning that your alarm is dying. Unlike a low battery warning (one chirp), this means the entire alarm needs to be replaced. You should deal with this issue as soon as possible., Interpretation of 5 Beeps. When your smoke detector emits a series of five beeps, it is essential to decipher the meaning behind this specific alarm sound. Here are some possible interpretations of the five beeps on a smoke detector: End of Life Warning: In some smoke detector models, a five-beep alarm could indicate an end-of-life warning ..., If the smoke alarms give three beeps, then nothing, or any other kind of consistent but spaced-out chirps, there are two possible malfunctions: the device or the battery. If your alarm beeps once every minute for five minutes, this generally means it might be at the end of the device’s life. You will need to replace the smoke detector, but ..., Are you an employee? Login here. Loading, Google is introducing new extreme heat alerts in Search that are designed to surface information to help people stay safe during heat waves. Google is introducing new extreme heat ..., According to Google, event reminders set in either Outlook or Google calendar should sync between both services. Once you have your Google Calendar synced to Outlook, you can modif..., BATTERY OPERATED CARBON MONOXIDE ALARM. WITH SILENCE FEATURE. Printed in Mexico. M08-0140-004 P 06/07. IMPORTANT! PLEASE READ CAREFULLY AND SAVE. This user's manual contains important information about your Carbon. Monoxide (CO) Alarm's operation. If you are installing this CO Alarm for use. , The Emergency Alert System - The Emergency Alert System allows media companies to receive emergency information quickly. Learn more about the emergency alert system in this article..., First Alert CO600A User Manual View and Read online. Est. reading time 19 minutes. ... HORN: Sounds loudly - 4 beeps, pause, 4 beeps, pause POWER/ALARM LIGHT: Flashes rapidly. WHAT YOU SEE AND HEAR UNDER DIFFERENT CONDITIONS. ... Carbon Monoxide Alarm First Alert CO606 User Manual. 120v plug-in carbon monoxide alarm …, Learn how to install, maintain, and troubleshoot your First Alert smoke and carbon monoxide alarms. Download manuals and get support., Here are some troubleshooting steps you can try if your unit is triple chirping. Factory reset the unit. Try a factory reset. After your alarm restarts and turns blue, pair it with your mobile device. Unmount and reset power. If the unit is still chirping, unmount the unit (hardwired)., Summary of Contents for First Alert CO600. Page 1 USER’S MANUAL 120V PLUG-IN CARBON MONOXIDE ALARM WITH SILENCE FEATURE Model CO600 120V C CONFORMS TO 60 Hz, 0.09 UL STD 2034 IMPORT NT! PLE SE RE D C REFULLY ND S VE. This user’s manual contains important information about your Carbon Monoxide …, After an alarm is turned on for the first time, it should last approximately 7-10 years in normal operating conditions. This can vary slightly based on the model you own. Check your alarm's manual for the exact warranty period. If your alarm is more than 10 years old, it's time for a replacement. First Alert's Smoke / CO Warranty begins at the ..., Sounds loudly - 4 beeps, pause, 4 beeps, pause. This sequence repeats for as long as the unit is in alarm. POWER/ALARM LIGHT: The LED flashes with the same pattern as, The First Alert CO600 Plug-In Carbon Monoxide Alarm uses an electrochemical CO sensor to detect elevated carbon monoxide levels. When CO is detected, the carbon monoxide detector sounds a loud 85-decibel alarm to warn you of the threat. Carbon monoxide is an odorless, tasteless, invisible gas, and it is the leading cause of accidental poisoning ..., In its second cost-cutting measure of 2023, Tesla slashed Model S and Model X prices in the U.S. by $5,000 and $10,000, respectively. Tesla has cut the prices of its Model S sedan ..., 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 Support. Hours of Operation:, If your smoke alarm is chirping even though it has a new battery, try these troubleshooting steps to clear out residual charge from the old battery. Remove the alarm from your ceiling or wall. Open the cover and take out the battery. Press and hold the test button for 15-30 seconds. This will fully reset the smoke alarm and drain any charge ..., Dual-Power Design for Continuous Monitoring. The First Alert CO615 Dual-Power Carbon Monoxide Plug-In Alarm is designed to work with any standard electrical outlet, and it features battery backup to allow continuous monitoring of carbon monoxide levels in the event of a power outage. Simply place two AA batteries in the battery compartment, and ..., CO problems can occur any time during the year, and this Alarm can only alert you if it is plugged in and receiving power. This CO Alarm is intended for use in a standard, unswitched 120V AC wall outlet. It is not intended for use in extension cords, power strips, or outlets controlled by a switch or dimmer., The Z-Wave Smoke & CO Combination Alarm - Battery Operated (Model # ZCOMBO / ZCOMBO-G) ZCOMBO has two versions: first and second generation. The second-generation model uses updated 500 series Z-wave protocols. Second-generation models have a QR code printed on the back to assist with pairing to your Ring smart home hub …, The First Alert CO605 Plug-In Carbon Monoxide Detector helps protect your family with an electrochemical sensor and an 85-decibel alarm, and easily plugs into any standard outlet with no additional mounting necessary. It also includes a battery backup, so CO is monitored even if there's a power failure. One button silences any nuisance alarms ..., We would like to show you a description here but the site won’t allow us., Are you an employee? Login here. Loading, Model: P1210 / PR710 / PR710B. Download product manual. Register your product. Buy now. Setup. ... Learn about 10-year-battery alarms offered by First Alert and BRK. General Help. Alarm Battery Drawer Won't Close. Learn how to …, 1 If the Alarm Signal Sounds. 2 If Your Co Alarm Sounds. 3 Replacing the Battery. 4 Testing and Maintenance. 5 Troubleshooting Guide. Download this manual. Original version. …, Are you an employee? Login here. Loading , SKU: 3120B. 4.4 / 5.0. (2442 Reviews) WHERE TO BUY. The First Alert® Hardwired Dual Sensor Smoke Alarm with Battery Backup is designed to provide peace of mind. The photoelectric and ionization sensors alert you to both smoldering and fast-flaming fires, offering comprehensive detection and early warning. The 85-decibel fire alarm can also ...