79
Critical
Delivery
Fault
The NOxBOX
i
has detected a critical
fault within the intelligent delivery
system, and can no longer guarantee
safe delivery function.
Check the ventilator is connected and
supplying sufficient flow.
If another system is not readily available and
patient requires therapy, engage the
manual override mode, replace the system as
soon as practically possible and alert the Service
Engineer.
Touch
screen will
not
respond.
The NOxBOX
i
has detected a
critical fault within the intelligent
delivery system, and can no longer
guarantee safe delivery function.
NO
delivery to the patient may have
stopped.
If another system is not readily available and
patient requires therapy, engage the manual
override mode, replace the system as soon as
practically possible and alert the Service
Engineer.
Medium Priority Alarms during therapy
Alarm
Priority
Possible Cause
Recommended Action
Zero
Calibration
Every 24 hours during use the NOxBOX
i
prompts the user to perform a sensor
zero. This operation ensures the most
accurate system performance by
checking the gas sensor reading
performance.
NOTE: This test takes up to 2 minutes to
perform. During this time the monitored
patient gases will be offline. The
NOxBOX
i
continues to deliver NO during
this time.
No special connections are required; the zero
calibration is fully automatic.
Press the tick to start the zero calibration.
The zero calibration can be delayed if the
system is not currently in a stable dose
delivery state: e.g. If the patient dose has
recently been changed and the system is still
stabilising to the new dose level, dismiss this alarm
message and perform the zero when the notice
next appears.
Zero
Calibration
Fail
One or all of the sensors have failed the
zero (low) calibration.
Ambient conditions may be affecting the
zero sample.
Check ambient NOxAIR monitor for high levels
of NO. If high levels are detected, check the
regulator(s) and supply line(s) for leaks.
A sensor may have become unstable
or residual gas may be present in the
system.
Repeat zero calibration.
Check the zero port (rear) has not been
blocked.
If another system is not readily available and
patient requires therapy, engage the manual
override mode, replace the system as soon
as practically possible and alert the Service
Engineer.
Cylinder
Low
This will appear when an alternate
viable gas supply is detected, but the
current feed cylinder is nearly depleted.
Replace the cylinder with a fresh
supply to resolve this alarm.
Alternatively, once the cylinder is empty, close
the cylinder valve fully, remove the feed hose
from the rear of the system and release the
pressure using the purge needle on the
monitor. Please note, once the second
cylinder begins to deplete, if this first cylinder
has not been replaced in the interim period,
the ‘cylinder supply critical’ alarm will be
triggered.
Summary of Contents for NOxBOX mobile
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