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Set the A/D value of the inspiratory valve to cause the flow of inspiratory valve to reach a
certain value. In this case, the flows measured by the ventilator flow sensor, inspiratory
flow sensor, and expiratory flow sensor should be the same. Test multiple points by setting
the A/D value of the inspiratory valve. For each point, the flows measured by the three
sensors should be the same. If not, the measured value by the flow sensor is inaccurate.
Troubleshoot the possible causes marked “*” in the above table.
5.4 Troubleshoot Sensor and Valve Related Failures
by Using the Valves-test Tool
5.4.1 Preparations before Using the Valves-test Tool
Make the following preparations before using the valves-test tool to locate the valves or
sensors related failures:
1 Connect the pneumatic circuit according to the type of sensor or valve to be checked.
Constant-flow connection method: Connect the tubes of the anesthesia machine
following the constant-flow connection method to check the flow sensors and
inspiratory valve. For details, refer to 4.3.2Flow Calibration (factory).
Constant-pressure connection method: Connect the tubes of the anesthesia
machine following the constant-pressure connection method to check the pressure
sensors and PEEP proportional valve. For details, refer to 4.3.3Pressure
Calibration (factory).
2. Make sure that the supply gas pressure is normal.
3. When the system is Standby, select the [Maintenance] shortcut key → [Factory
Maintenance >>] → [Diagnostic Test >>] → [Valves-Test Tool >>] to access the
[Valves-Test Tool] menu.
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