Mindray WATO EX-55Pro, Service Manual

Page: 311 / 474

8-57
Failure
Description
Possible Cause Recommended Action
The breathing tube connecting to the
patient end is damaged.
Replace the breathing tube.
The bellow is damaged.
Replace the bellow once every
year.
The sealing connector of other parts of
the breathing system is damaged.
Repair or replace the sealing
connector according to section
5.2.3.4 Adjusting the Regulator of
the Pipeline Gas Inlet Assembly.
The condensation valve of the canister
assembly is not properly installed or the
internal sealing part is damaged. Re-install the condensation valve
or replace the damaged internal
sealing part.
The O2
concentration
measurement
fails or has a
large
deviation.
The measurement face of the O2 sensor
has a build up of water. Clean a build up of water and dry
the O2 sensor in the air.
The O2 sensor is not calibrated.
Calibrate the O2 sensor according
to section 4.3.6 O2 Sensor
Calibration.
The O2 sensor is damaged. Replace the O2 sensor.
The reading of
the airway
pressure gauge
is inaccurate or
the pointer of
the airway
pressure gauge
cannot move.
The airway pressure gauge is damaged.
Replace the airway pressure
gauge.
Irregular flow
waveforms are
displayed.
The flow sensor assembly is not properly
installed. Re-install the flow meter
assembly.
The flow sensor assembly has a build up
of water. Remove the flow sensor assembly
and clean the build up of water.
The film of the flow sensor assembly is
deformed or dirty, or the internal
resistance is changed. The pressure
sensor of the fresh air flow sensor board
encounters zero drift.
In maintenance mode, calibrate
the flow sensor according to
section 4.3.2 Working Principles.
The flow sensor is damaged. Replace the flow sensor assembly.
The pressure sensor on the fresh air flow
sensor board is damaged. Replace the fresh air flow sensor
board.