Mindray WATO EX-55Pro, Service Manual

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4-21
4.11.2 Bellows Test
1. Set the system to Standby.
2. Set the Bag/vent switch to the mechanical ventilation position.
3. Set all flow controls to minimum.
4. Connect the Y piece on the breathing tube to the leak test plug to occlude the outlet of
the Y piece..
5. Push the O
2
flush button to fill the bellows, which rises to the top.
6. Make sure that the pressure reading on the airway pressure gauge must not increase to
more than 15 cmH
2
O
7. Release the O2 flush button and the bellows should not fall. If it falls, it indicates that
the bellows assembly has a leak. You need to reinstall the bellows.
4.11.3 Breathing System Leak Test in Manual Ventilation Mode
NOTE

Perform leak test again each time after servicing the anesthesia machine, replacing
the components, or re-connecting the tubes.

Before performing breathing system leak test, make sure that there is no alarm of
pressure monitoring channel failure on the screen.
The test aims to check if the pneumatic circuit has leaks in manual ventilation mode. Test items
include APL valve, check valve, sodalime canister, patient tubes, flow sensors and their
connectors.
There are two methods available for breathing system leak test in manual ventilation mode. One is
by software auto test and the other by manual test.
4.11.3.1 Software Auto Test
There are two ways available to enter the software auto test screen.
Way 1: Push the [
Maintenance
] key to enter the maintenance menu. Select [
Factory
Maintenance>>
] and enter the required password to enter the factory maintenance menu. Select
[
System Setup
] and switch on leak test in the system setup menu. Then restart the machine. Select
[
Continue
] on the startup selftest result screen to enter the manual leak test screen.
Way 2: Make sure that the system is Standby. If not, press the key and select [
Ok
] from the
pop-up menu to enter Standby. Push the [
Maintenance
] key to enter the maintenance menu. Select
[
System Leak&Compliance Test
] to enter manual leak test screen.
To do the manual leak test:
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. Insert the Y piece into the test plug.
4. Install the manual bag.
5. Turn the APL valve to 75 cmH2O.
6. Turn all flow controls to zero.
7. Set the bag/vent switch to the bag position.