Mindray WATO EX-55Pro, Service Manual

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8. Push the O
2
flush button to let the pressure fall between 25 and 35 cmH2O on the airway
pressure gauge.
9. Select [
Continue
] to start manual leak test.
10. When the manual leak test is completed, the screen for manual leak test result is
switched to automatically, prompting the manual leak test result.
 “Pass” is displayed if the manual leak test is passed.

“Fail” is displayed in red if the manual leak test is failed.
4.11.3.2 Manual Test
To do the breathing system leak test in manual ventilation mode:
1. Make sure that the system is Standby. If not, press the key and select [
Ok
] from the
pop-up menu to enter Standby.
2. Set ACGO to patient circuit (if ACGO is configured).
3. Set the bag/vent switch to the bag position.
4. Connect the manual bag to the manual bag port.
5. Turn the APL valve control to fully close the APL valve (75 cmH
2
O).
6. Turn the O
2
flow control to set the O
2
flow to 0.15 to 0.2 L/min.
7. Close the breathing system at the patient connection.
8. Push the O
2
flush button to let the pressure increase to approximately 30 cmH
2
O on the
airway pressure gauge.
9. Release the O2 flush button. A pressure decrease on the airway pressure gauge indicates
a leak. Look for and repair the breathing system leak.
4.11.3.3 Commonly-encountered Problems and Recommended Actions
The following table lists the commonly-encountered problems and recommends actions for
breathing system leak test in manual ventilation mode.
Failure description Possible cause Recommended action
Software auto leak test is
failed. 1. The reading on the drive gas
pressure gauge indicates drive
gas pressure low (lower than 200
kPa) and the alarm of [
Drive
Gas Pressure Low
] is produced.
Replace or connect gas supplies
and make sure that the drive gas
pressure is at 280 to 600 kPa.
2. The bag/vent switch is not set
to the bag position. Set the bag/vent switch to the
mechanical ventilation position.
Manual circuit is leaky. 1. The Y piece on the breathing
tube is not connected to the test
plug.
2. The APL valve is not turned
to the maximum pressure.
3. The manual bag port is not
occluded with test lung.
4. The CO2 absorbent canister is
not installed in place. Check the pneumatic connections
and do the test again strictly
following the operation
instructions.