6.Model
The following table illustrates the possible digital displays, describes the audible alarm patterns, and the recommended actions to take.
Operating and Alarm Characteristics
LCD Display Shows | Alarm Sound | Unit Status | Recommendation | |
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| A steady display of | 4 quick beeps, | Alarm condition. | Refer to “What to |
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| CO concentration | 5 secs. silence, | Dangerous | do When the Alarm |
| from | repeating | concentrations of | Sounds” (inside front |
LED flashes with beep |
| CO detected | cover) | |
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| Brief “888” for | None | Self test when first | None – CO has |
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| approximately 30 |
| powered up | not been detected. |
| seconds |
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| Numbers shown for |
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| test purpose only |
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| “- - | 4 quick beeps, | Test/Reset button is | None – CO has |
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| by “888” are | 5 seconds | pressed | not been detected. |
| shown to indicate | silence, |
| Numbers shown for |
test mode | repeated once |
| test purpose only | |
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| Steady “0” displayed, None | Normal DC | None | |
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| dot flashing every 5 |
| operation with |
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| seconds, Green LED |
| good batteries |
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| flashes every 30 secs. |
| (sensing no CO) |
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| “Lb” flashes | One quick beep |
| alternately with | every 60 seconds |
| any number, |
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| |
Amber LED flashes every |
| |
second. |
| |
Unit batteries are not capable of powering the unit either because of age, storage or the voltage of the battery
If unit is cold, allow to warm up above 68°F. If the unit is at room temperature and is beeping /flashing every 60 seconds the unit needs to be replaced.
| “Err” displayed, | One quick beep | Unit is Error |
| Amber LED flashes | every 30 seconds | condition |
| every second and |
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green LED flashes error code |
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every other 30 second period. |
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| Display is blank | Constant alarm | Unit malfunction |
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Press and hold the test button for 5 seconds to perform a reset. If unit continues to beep or alarm, using a screwdriver slide the switch on the back of the unit up to the shut down position. Unit will not respond to CO.
Number from | None | Peak Level Memory | Refer to following |
| activated. Highest | section for informa- | |
|
| concentration of | tion regarding Peak |
|
| CO detected is | Level Memory |
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| displayed |
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“End” displayed.Green 
LED flashes error code every other 30 second period and amber LED flashes every second.
Two quick | End of unit life | Replace unit imme- |
beeps every |
| diately. Unit will not |
30 seconds |
| respond to CO. |
The problems listed above are under normal operating conditions. Other “Err” conditions could exist. If you should have any questions regarding display conditions, call our Consumer Hotline.