Display Readings
Your new Carrier carbon monoxide alarm is a sophisticated electronic device – yet very simple to understand. Basically, the unit will display a “0” if it senses 30 PPM of CO or less and if you have a good backup battery pack installed.
If it senses carbon monoxide, it will display a reading so you can see if you have a
However, if the backup battery pack is low or missing, or if the unit malfunctions, it will display other readings (and alarm differently) to alert you that something is wrong with the alarm.
Please familiarize yourself and other family members to the difference between a CO reading and a reading signifying a problem with the alarm itself.
AC and DC Start Up, Alarm and Error Operation
| Display Shows | Alarm Sound | Unit Status | Unit Condition | Recommended |
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| Action |
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| Brief “888” |
| One short | Self testing on | Normal opera- |
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| and flashing |
| “chirp”. | tion at | quickly display |
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| dot. |
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| or reset. | a zero. |
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| Steady display | 4 quick | Carbon monoxide | Unit in alarm | Refer to page |
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| of number |
| beeps, 5 | detected. | condition. | 23, What to do |
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| between 30 |
| seconds off, |
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| if alarm sounds. |
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| and 999. |
| repeating. |
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| Steady “Err” |
| “Chirp” every | Unit is not | Unit malfunction. Contact customer |
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| and flashing |
| 30 seconds. |
| service at |
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| dot. |
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| not detect CO. |
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| No display. |
| Constant alarm. Unit is not | Unit malfunction. Contact customer |
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| service at |
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| not detect CO. |
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