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COD100B
Item ref: 350.135UK
User Manual
Carbon Monoxide Alarm

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Kenny
February 24, 2025

the alarm was beeping so I changed the batteries, Now the indicator is showing "End" and beeps / flashes every 23 seconds.

1 comments:
Mr. Anderson
February 24, 2025

When the Mercury COD100B alarm displays "End" and beeps/flashes every 23 seconds after changing the batteries, it indicates that the device has reached the end of its 7-year lifetime and should be replaced immediately.

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Summary of Contents for Mercury COD100B

  • Page 1 COD100B Item ref: 350.135UK User Manual Carbon Monoxide Alarm...
  • Page 2: Product Specifications

    Thank you for choosing this Mercury carbon monoxide alarm. This alarm is design to protect you and your family from carbon monoxide poisoning. Any household or indoor area that has a fireplace or combustion appliance will have an increasing chance of rising carbon monoxide levels, especially in older buildings where ventilation is lacking.
  • Page 3 Power LED indicator Alarm output Fault LED indicator Test/Menu button Alarm LED indicator Back cover catch LCD display Battery compartment Installation: Start up: Remove the alarm from the packaging and slide the back cover downwards to reveal the battery compartment. Insert 3 x AA batteries (supplied) to the correct polarity, the alarm will beep once and all 3 LEDs will flash to indicate power up.
  • Page 4 Installation: After finding an appropriate location, the wall bracket can be screwed onto the wall using the supplied hardware. Alternatively it can be stuck on using a pad sticker or just rested on top of a unit. To mount the bracket using hardware, use the mounting plate as a guide to mark the two holes.
  • Page 5 The alarm will perform self-checking of the sensor every 2 minutes. Under normal conditions no LEDs will flash. If the sensor fails, the amber fault LED will flash once every 2 minutes together with two long beeps. Also the LCD will display the error message as below, this indicates the alarm sensor or circuitry has failed.
  • Page 6 The alarm is designed to record maximum readings and average readings over the last 24- hour period. This allows you to keep track of the presence of carbon monoxide without needing to be present in the room. To bring up the reading, simply press and hold TEST button until “Ph=”...
  • Page 7 What is carbon monoxide? Carbon monoxide (CO) is a highly poisonous gas that has no taste, colour or smell. Carbon monoxide is a cumulative poison meaning long-term exposure to low levels may cause symptoms. This alarm is time-weighted – the higher the level of CO, the sooner it will alarm. What produces CO in the home? Many appliances can produce deadly CO levels if they are not in fully working order.
  • Page 8 Carbon monoxide poisoning action and treatment: In the event of carbon monoxide poisoning, switch off/put out the source of carbon monoxide immediately if known. Open all doors and windows to allow fresh air to flow in and evacuate all persons from room or building. Seek medical support immediately. Contact the emergency gas service and allow them to inspect the building to ensure it is safe before re-entering.

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