Welch Allyn Atlas Monitor - User Manual - Manual (Page 103)

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RECOMMENDED ACTIONS:
An electrical fault has been detected in the Temperature system. You can continue to use the Atlas
Monitor until it is convenient to perform repairs, if it acceptable to operate without Temperature sensing.
The unit must be repaired.
MESSAGE:
Unexpected forward flow - CO
2
unavailable
Unexpected reverse flow - CO
2
unavailable
MEANING:
The CO
2
system has detected an unacceptable level of airflow that is overpowering the flow requirements
of the CO
2
pump system.
RECOMMENDED ACTIONS:
Check that the CO
2
tubing is connected as a Sidestream sample. Mainstream sampling is not supported on
Atlas Monitor.
Check that there is no pressure or vacuum source connected to the CO
2
tubing.
Check that there is no pressure or vacuum source connected to the CO
2
exhaust outlet on the rear of the
Atlas Monitor.