Mindray A8 - Inaccurate PEEP Control

7-49
Failure
Description
Cause Confirmation
Confirmation
Result
Solution
ml.
Check the fresh air flow
setting.
The fresh air
flow setting is
beyond the
optimizer range.
Adjust the fresh air flow
setting to be within the
optimizer range.
Check the zero point of the
sensor by referring to 5.15.
Refer to 5.15.
Zero the sensor by referring
to 6.3.7.
Check whether pressure
measurement of the pressure
sensor is accurate by
referring to
5.17 (device
required) or 7.6.1.3
(no
device required).
Make a judgment
by referring to
5.17 or 7.6.1.3.
(1) Perform pressure
calibration by referring to
6.3.5.
(2) If the problem persists,
replace the sensor adapter
board (refer to 11.1.16).
Perform inspiratory valve
diagnosis by referring to
7.6.2.
A diagnosis error
occurs.
Replace the drive gas
assembly (refer to 11.1.17).
Open the service door (refer
to 8.1.1) and check whether
the sensor adapter board and
3-way valve sampling line
are connected properly.
The silicone tube
loosens or is
occluded.
Reconnect the silicone tube
and prevent it from
occlusion.
Remove the VE assembly by
referring to 8.29 and check
whether the sampling line on
the work surface is connected
properly.
The silicone tube
loosens or is
occluded.
Reconnect the silicone tube
and prevent it from
occlusion.
Check whether other
technical alarms are
generated.
A ventilation
technical alarm is
generated.
Refer to 7.3 to clear the
alarm.
The problem persists.
The problem
persists.
Replace the drive gas
assembly (refer to 11.1.17).
7.4.6 Inaccurate PEEP Control
Failure
Description
Cause Confirmation
Confirmation
Result
Solution
Inaccurate PEEP
control
Check whether the gas
supply is sufficient.
The gas supply
pressure is less
than 280 kPa (40
psi).
Connect or replace the gas
supply.
Check the zero point of the
sensor by referring to 5.15.
Refer to 5.15.
Zero the sensor by referring
to 6.3.7.
Check whether pressure
measurement of the pressure
sensor is accurate by
referring to
5.17 (device
required) or 7.6.1.3
(no
device required).
Make a judgment
by referring to
5.17 or 7.6.1.3.
Perform pressure calibration
by referring to 6.3.5.
Open the service door (refer
to 8.1.1) and check whether
the sensor adapter board and
The silicone tube
loosens or is
occluded.
Reconnect the silicone tube
and prevent it from
occlusion.