Robinair 16900 Refrigerant Identifier - Manual (Page 18)

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AIR SENSOR FAULT: Signifies an air detection sensor calibration fault.
Corrective Action:
1. Verify the air intake port and sample exhaust port of the instrument
are not clogged or obstructed.
2. If the instrument is being used in an enclosed area, oxygen-
depleting compounds, such as carbon dioxide or carbon monoxide,
may accumulate in the surrounding atmosphere and be drawn into
the intake port during calibration. Move the instrument to a location
with fresh ambient air, free of oxygen-depleting compounds.
Use the instrument in locations that provide adequate ventilation
to prevent the accumulation of oxygen-depleting compounds in the
surrounding atmosphere.
WARNING
If error codes indicate that oxygen-depleting compounds are in
the surrounding atmosphere, take immediate action to rid the area
of these compounds, and provide adequate ventilation to prevent
such accumulations. The accumulation of oxygen-depleting
compounds in the surrounding atmosphere present a hazard to
human health.
3. To clear the error code, power down the instrument. The error code
automatically clears.
RECALIBRATION REQUIRED: The prior calibration is too old and
requires refreshing. This message appears whenever a 3-minute period
elapses from the prior calibration.
Corrective Action:
1. Remove the sample hose connection from the refrigerant source if
so connected. Depress the A button to initiate a new calibration.
Error Codes