7-27
Failure Description Possible Cause Recommended Action
[00200000] is
displayed
The maximum value cannot be
found.
1. Use the valve diagnosis tool to
diagnose: (1) Turn on the inspiratory
valve in 4000 DA and check that the
flow speed measured by the
calibration device reaches 90 L/min.
(2) Turn off the inspiratory valve.
Open up the inspiratory valve
gradually in DA. Check the DA when
the flow speed measured by the
calibration device is 80 L/min.
Increase the DA by 10. If the flow
speed is increased no more than 5
L/min, it indicates that the maximum
point may exist and the software fails
to found it. In this case, a
re-calibration is recommended.
2. Replace the inspiratory valve.
[00400000] is
displayed
The minimum value cannot be
found.
1. Use the valve diagnosis tool to
diagnose: (1) Turn on the inspiratory
valve in 0 to 2000 DA. If the AD
value measured by the inspiratory
flow sensor increases gradually, a
re-calibration is recommended.
2. Replace the inspiratory valve.
[00800000] is
displayed
Locating the minimum flow
speed DA range timed out.
1. Check that the calibration tube is
connected to the flow inlet on the
calibration device correctly.
2. Replace the inspiratory valve.
[01000000] is
displayed
The zero point of the
calibration device exceeds the
standard.
1. Zero the calibration device.
[02000000] is
displayed
The small flow speed
calibration is not monotonic.
1. Check that the calibration tube is
connected to the flow inlet on the
calibration device correctly.
2. Replace the inspiratory valve.
[04000000] is
displayed
The valve is leaking.
Replace the inspiratory valve
assembly.
7.3.3 Pressure Calibration (Service)
NOTE
After the VCM or expiratory valve assembly is replaced, pressure calibration
(service) shall be implemented.
If the deviation between the value measured by the embedded pressure sensor and
the value measured by a standard flow measurement device is great, pressure
calibration (service) shall be implemented.
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