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When powered in a no flow condition, the AirGuard will report a system fail “X” and a red fan icon. Additionally,
the system status screen will indicate a flow alarm and sensor flow failures. Once flow is re-established from the
compressor the system status will return to a green check and fan will turn green. The AirGuard system status
screen will display updated information clearing the flow alarm and sensor flow failures to green checks.
Once the gas flow is started, it will take about 4 minutes for the LCD to report the measured gas concentration.
The range of acceptance on a 10 ppm CO standard is 9 ppm to 11 ppm. If the gas concentration is outside of these
values we recommend a complete two-step calibration be performed. Refer to page 23 for step by step calibration
instructions.
