Mindray A9 Service Manual

7-4
e) Check whether the check valve cover has cracks. If yes, replace the valve cover (refer to
11.5.2).
f) Remove the absorber canister, fix the locking handle in the locked position, and perform the
leak test. If the test succeeds:
 Replace the bypass (refer to 11.5.1).
 Replace the absorber canister (refer to 11.5.1).
g) If the test succeeds without connecting the vaporizer or after the vaporizer is replaced,
replace the vaporizer.
h) If the test succeeds after the O2 cell holder is removed, replace the O2 cell holder (refer to
11.5.1).
i) Switch to ACGO, connect the ACGO to the inspiratory port, and set the O2 flow to 0.2
L/min in diagnostic mode (referring to 7.6.5, set the O2 switch valve to On and set the AD value
of the O2 proportional valve until the O2 flow displayed on the left is 0.2 L/min). This is
intended to check whether the pressure of the airway pressure gauge can rise above 30 cmH2O.
 If the pressure of the airway pressure gauge cannot rise above 30 cmH2O:
iv. Check the internal pipeline connection (refer to step 1):
 Check whether the internal pipelines loosen. If yes, tighten them.
v. Check whether leakage occurs on the vaporizer dock:
 Install the vaporizer in another slot.
 Replace the sealing ring of the vaporizer dock (refer to 11.4.1).
 Bypass or replace the vaporizer dock (refer to 11.4.1).
vi. If the test succeeds after the built-in AG module is bypassed, replace the built-in AG
module (refer to 11.1.7).
vii. If the test succeeds after the ACGO assembly is bypassed, replace the ACGO
assembly (refer to 11.1.6).
viii. If the test succeeds after the O2 flush assembly is bypassed, replace the O2 flush
assembly (refer to 11.1.12).
j) Replace the airway pressure gauge (refer to 11.1.12).
k) Open the service door (refer to 8.1.1), remove the auxiliary outlet (refer to 8.1.2), remove
the rear cover plate of the work surface (refer to 8.1.3), and connect the gas supply. Power on the
machine with the battery and check whether any pipeline loosens or leaks at the rear of the
machine during ventilation. Remove the VE box assembly (refer to 8.29) and check whether any
internal pipeline loosens or leaks during ventilation.
l) Perform the PEEP valve test by referring to 7.6.3. If the test fails, replace the drive gas
assembly (refer to 11.1.17).
m) Replace the bypass (refer to 11.5.1).
n) Replace the circuit (refer to 11.5.1).
o) Replace the VE (refer to 11.1.15).
p) Replace the water collection cup (refer to 11.5.2).
q) Replace the sensor adapter board or 3-way valve assembly (refer to 11.1.16).
7.2.4 Leak Test Failures in Manual Mode
1.If the auto leak test succeeds, but the manual leak test fails, solve the problem as follows:
a) Verify the operations:
b) Whether the bag is connected properly;
c) Whether the APL valve is adjusted to 30 cmH2O or above;
d) Whether the bag arm is installed in place and securely;
e) Whether the APL valve is installed in place and securely.
2.Check the components:
a) Check whether the bag is damaged. If yes, replace it.
b) Check whether the bag arm breaks or leaks.

Mindray A9 Specifications

General

Brand	Mindray
Model	A9
Category	Medical Equipment
Language	English