6.3.7 Maintenance of the CO Sensor
The CO Sensor is not as susceptible to dirt as the photo or ion sensors, and does not compensate for a loss of sensitivity over the period
of its lifetime.
The following two operations to inform a qualified or trained service person that a CO sensor has reached its end of life:
• The FACP panel generates an End of Life trouble notifying the user that a replacement sensor is required.
• Manual standard maintenance testing by a qualified or trained service person checks that the device is fully operational.
6.3.8 End of life service
The end of life of a CO Sensor is based on the manufacture date of the device, not the installation date.The FACP panel daily checks each
IDNet CO combination sensor for the End of Life trouble expiration date.The FACP panel generates the following status report based on
the condition of the CO Sensor:
• None: the CO Sensor has not reached the expiration date.
• Almost Expired 6M: the CO Sensor is within 6 months of the expiration date.
• Almost Expired 12M: the CO Sensor is within 12 months of the expiration date.
• Expired (End of Life): the CO Sensor’s date has expired.
To clear the trouble at the panel:
1. Install a new CRS with a valid date.
2. Perform a hardware reset of the FACP.
Note: For the panel to annunciate these warnings, enable the logging of the Almost Expired trouble, with the exception being the
Expired trouble condition which does not require any activation.
The TrueAlarm CO report can also be used to list all End of Life dates of CO sensors in the panel. The report is a quick and easy way to
check if any sensors will expire before the next visit to the site.
6.3.9 Standard maintenance
To verify that the sensors are operating correctly, standard maintenance of the CO sensors is required. The standard maintenance process
is as follows:
1. The FACP panel is put into the service test mode using either the diagnostic function menu item on the front panel or the system
diagnostic computer port command.
2. A trouble displays at the panel indicating that the panel is in the Device Test Mode.
3. A tester introduces CO gas, heat and smoke simultaneously into the detector.
4. The device LED on the base turns ON steady if any, but not all of the sensors on the device cross an alarm threshold.
5. The device LED on the base flashes slowly if all of the sensors cross an alarm threshold.
6. The appropriate action based on the point type of the CO sensor is taken at the panel.
7. Device Test Mode shall is entered if a faster response time is needed during Walktest.
Note: There is a 20 device LED maximum that can be ON/Flashed at any given time. This limit applies during testing, and during alarm
operation. Reset the panel before this limit is reached during testing so that the LED can be used as an indication of a successful test.
page 39 574-709 Rev. AP
4098 Detectors, Sensors, and Bases Application Manual
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