Mindray A7 Service Manual

Pneumatic Circuit System Problems Repair and Troubleshooting
5 - 54 046-006272-00 A7™ Service Manual
The bellows sealing cushion falls off or is
damaged.
Replace the bellows sealing cushion,
which is required to be replaced once a
year.
The valve cover of the breathing valve
assembly is not installed properly.
Re-install the valve cover and ensure its
correct installation.
The seal for the valve cover of the
breathing valve assembly is damaged.
Replace the seal.
The breathing tube connecting the
patient is damaged.
Replace the breathing tube.
The bellows is damaged.
Replace the bellows, which is required to
be replaced once a year.
The sealing connection of other parts of
the breathing system is damaged.
Repair or replace the sealing connection
as per the procedures described in
‘‘Adjust the Regulator of the Pipeline Gas
Supply Inlet Assembly’’ on page 5-40
The condensate valve of the canister
assembly is not installed properly or the
seal inside is damaged.
Re-install the condensate valve or replace
the damaged seal inside.
O2 concentration
measurement fails
or has great
deviations.
The AG Module is not calibrated.
Calibrate the AG Module as per
section 4.3.7 (pg. 4-56) "Calibrate the AG
Module" .
The AG Module is damaged. Replace the AG Module.
The airway
pressure gauge
shows inaccurate
reading or its
pointer cannot
move.
The airway pressure gauge is damaged. Replace the airway pressure gauge.
The flow wave is
displayed
irregularly.
The flow sensor assembly is not installed
properly.
Re-install the flow sensor assembly.
There is water built up inside the flow
sensor assembly.
Remove the flow sensor assembly and
clear its inside water build-up.
The membrane of the flow sensor
assembly is distorted, dirty or its inside
resistance changes. Zero drift occurs to
the pressure sensor of the fresh flow
sensor board.
Enter the service mode and calibrate the
flow sensor as per the procedures
described in ‘‘If measurement deviations
are not corrected after multiple flow
sensor calibrations, the user is
recommended to replace the flow sensor
and then perform calibration. If the
problem persists, factory maintenance is
necessary.’’ on page 4-8.
The flow sensor is damaged. Replace the flow sensor assembly.
The pressure sensor on the fresh flow
sensor board is defective.
Replace the fresh flow sensor board.
The flow sensor pressure sampling
pipeline leaks.
Repair the flow sensor pressure sampling
pipeline after checking as per the
procedures described in “Leak Test of
Flow Sensor Pressure Sampling Pipeline”
on page 5-55.
Failure
description Possible cause Recommended action

Mindray A7 Specifications

General

Brand	Mindray
Model	A7
Category	Medical Equipment
Language	English