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4.3.2.2 Commonly-encountered Problems and Recommended Actions
Failure description Possible cause Recommended action
[Manual Vent.] is prompted. The
bag/mechanical ventilation switch
is set to the bag position.
Set the bag/mechanical ventilation
switch to the mechanical
ventilation position.
[Drive Gas Pressure Low] is
alarmed. The pressure indicated by
the drive gas (O2) pressure gauge
is lower than 200 kPa.
Replace or connect the gas supplies
to make sure that drive gas
pressure is between 350 and 450
kPa.
After [Start] is
selected, no
ventilation sound is
heard. Very soon,
the prompt message
of [Calibration
Failure! Please try
again.] is displayed.
Zero point error occurs to the
inspiratory/expiratory flow sensor.
Refer to 4.2.4Check the Sensor
Zero Point.
Replace the monitor board.
The sampling line of at least one
out of the inspiratory flow sensor,
expiratory flow sensor and
ventilator flow sensor is not
connected or is connected in the
reverse order. Refer to
5.4Troubleshoot Sensor and Valve
Related Failures by Using the
Valves-test Tool.
Re-connect the sensor sampling
line.
The maximum flow to open the
inspiratory valve is less than 90
L/min. Refer to 5.4Troubleshoot
Sensor and Valve Related Failures
by Using the Valves-test Tool.
Replace the expiratory valve
assembly.
After [Start] is
selected, ventilation
sound is heard. Very
soon, the prompt
message of
[Calibration Failure!
Please try again.] is
displayed.
1. The pneumatic circuit
connection between the anesthesia
machine calibration device and the
monitor board has an error.
2. The communication connection
between the anesthesia machine
calibration device and the
anesthesia machine has an error.
3. The settings of the anesthesia
machine calibration device have an
error.
1. Check the pneumatic circuit
connection between the anesthesia
machine calibration device and the
monitor board. Re-connect the
pneumatic circuit if necessary.
2. Check the communication
connection between the anesthesia
machine calibration device and the
anesthesia machine. Or re-connect
them to ensure normal
communication. If the problem
persists, replace the
communication cable.
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