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The Disable IDNET CO Algorithms is one of the options available under the Diagnostics menu, at
the front panel of the FACP. When choosing this option, the technician ensures that the CO
sensors will get a testing threshold downloaded and the CO over time is disabled. With the Disable
IDNET CO Algorithms option on, the technician can then proceed to test the devices with the
WalkTest option Enabled or Disabled. When the Disable IDNET CO Algorithms is entered, a
trouble will be generated. The trouble screen that will appear will look as follows:
IDNET CO ALGORITHMS DISABLED (TROUBLE)
TROUBLE POINT ABNORMAL
Since all three possible sensors (photo, heat and CO) could be tested simultaneously, the LED on
the base will be used to give the technician an indication of the test result. The LED states and
their meanings are as follows:
LED OFF - No sensors have passed the test
LED ON - At least one sensor has passed the test (If testing only one sensor this is the LED
state you'd expect if the test passed).
LED FLASHING - All sensors for this device have passed the test (Note: This could be 2 or 3
sensors depending on what type of CO combination device is configured. This state will not
be seen if only a single sensor is being tested)
Because the sensors can either be tested one at a time or by combining multiple technologies into a
single test, one can follow two similar approaches to complete the tests. Figures 8-1 and 8-2 show
the two flowcharts denoting those approaches.
FigureTag FD9-197-01
Figure 8-1. Testing a Single CO Sensor
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Disable IDNET CO Algorithms
NOTE: The following describes the LED states
LED OFF – The sensor has not exceeded its
threshold
LED ON – Sensor has exceeded its threshold
LED FLASHING – This state will not be seen when
only a single sensor is being tested
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