9650-1212-01 Rev. E
17
Messages and Troubleshooting
ZERO DONE
The sensor/adapter zero, or the LoFlo module
zero is finished.
No action required.
ZERO FAILED
The zero operation did not complete
successfully.
Clear the occlusion, remove any source of CO
2
,
and try zeroing again. If problem persists,
contact Technical Support.
MAINSTREAM MESSAGES
Message/Symptom
Possible Cause(s)
Recommended Action(s)
CHECK CO2 ADAPTER
This is usually caused when the airway
adapter is removed from the
CAPNOSTAT 5 CO
2
sensor, or when there
is an optical blockage on the windows of the
airway adapter.
It may also be caused by not having
performed an adapter zero after changing
the adapter type (single patient use vs.
reusable).
Clean the airway adapter and reattach it. If
the problem persists or the adapter type
was changed, perform a mainstream airway
adapter zero as described in “Zeroing the
Mainstream CAPNOSTAT 5 CO2 Sensor/
Airway Adapter” on page 5.
CHECK CO2 SENSOR
The CAPNOSTAT 5 CO
2
sensor cable is
not properly plugged in or is over
temperature.
Check that the sensor cable is plugged in
and properly seated in the connector.
Check that the sensor is not exposed to
excessive heat.
If the problem persists, replace the sensor.
CO2 IN ADAPTER: WAIT
There is CO
2
in the airway adapter when
attempting to zero.
Zeroing was attempted within 20 seconds
of previous zero operation.
Remove airway adapter from CO
2
source
including the patient’s, and your own
exhaled breaths, and ventilator exhaust
valves.
Wait up to 20 seconds before retrying a
mainstream airway adapter zero, as
described in “Zeroing the Mainstream
CAPNOSTAT 5 CO2 Sensor/Airway
Adapter” on page 5.
ZERO CO2 ADAPTER
Negative CO
2
detected. May be caused by
a sensor that was zeroed with CO
2
in the
airway, or by an optical blockage of the
airway adapter.
Check the airway adapter and clean if
necessary. Perform a mainstream airway
adapter zero as described in “Zeroing the
Mainstream CAPNOSTAT 5 CO2 Sensor/
Airway Adapter” on page 5.
ZEROING CO2 ADAPTER
Adapter zeroing is in progress.
Wait for the adapter zeroing to finish.
COMMON MESSAGES (Continued)
Message/Symptom
Possible Cause(s)
Recommended Action(s)
