Mindray WATO EX-55Pro, Service Manual

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4.11.3.4 Definitions of Error Information during Breathing System Leak
Test in Manual Ventilation Mode
During the leak test, many abnormal factors or operations may result in breathing system manual
circuit leak test failure. The following table lists the definitions of various abnormal factors. If the
breathing system leak test fails, the relevant error code will be recorded in the service logbook.
S/N Cause Description Error code
1
The user cancels the
command.
/ 0000 0001
2
The bag/vent switch is in
vent position.
/ 0000 0002
3 ACGO is ON. / 0000 0004
4 O2 supply pressure is low. / 0000 0008
5
The airway pressure sensor
has an error. The zero point of airway pressure sensor is
not within the range of 0~1200(AD).
0000 0010
6
The airway pressure is not
sufficient. Before the test, the airway pressure in the
circuit is less than 18cmH2O
0000 0020
7 Pressure drops drastically. Pressure drops by more than 10cmH2O. 0000 0040
NOTE

If there is indeed a leak, check the pneumatic circuit system for leakage and
troubleshoot the problems as described in section 8.3 Leak and Compliance Tests.

After leak failure is troubleshot, do the leak test again and make sure the test is
passed.
4.11.4 Breathing System Leak Test in Mechanical Ventilation
Mode
NOTE

Perform leak test again each time after servicing the anesthesia machine, replacing
the components, or re-connecting the tubes.
The test aims to check if the pneumatic circuit has leaks in mechanical ventilation mode. Test
items include bellows, drive gas circuit, CO2 absorbent canister, patient tubes, flow sensors and
their connectors.
4.11.4.1 Test Procedures
NOTE

Breathing circuit leak test must be performed when the system is Standby.

Before doing the breathing circuit leak test, make sure that the breathing circuit is
correctly connected and the breathing tubes not damaged.

Before doing the breathing system leak test, make sure that the drive gas pressure
is sufficient and the screen does not have alarms of flow sensor failure or pressure
monitoring channel failure. During the leak test, make sure that the test
procedures are strictly followed.

During the leak test, selecting [
Cancel
] will stop the ongoing leak test. To continue