Mindray A7 Service Manual

A7™ Service Manual 046-006272-00 2 - 27
Installation Guide Functional Tests
2.3.1.3 Troubleshooting: Leak Test
The following table lists the commonly-encountered problems and recommends actions for the
Breathing System Leak Test in Manual Ventilation Mode.
2.3.2 Automatic Backup Flow Control Test
This test checks whether the automatic backup flow control (BFCS) system work normally. Test
items include the Solenoid Actuator, Stepper Motor, Position Sensor, and 3-Way Valve.
To Perform an Automatic Backup Flow Control Test:
1. While powering on the A7, the system calculates the time between the last successful
Automatic Backup Flow Control Test time and current time. If the difference between the two is
greater than 168 hours, the manual circuit test screen is entered from startup and BFCS knob is
not deployed, the system enters first Automatic Backup Flow Control Test screen when manual
circuit test is completed. If the test does not appear after the manual leak test, go to SETUP /
SERVICE / TEST BFCS to activate the test.
Failure description Possible cause Recommended action
Leak test failure is
prompted immediately
after [Start] is selected
(typically, the leak test
requires at least 3 minutes).
The Auto/Manual ventilation switch is set
to the bag position and the message
[Manual Vent.] is prompted.
Set the Auto/Manual ventilation
switch to the mechanical
ventilation position.
The reading on the drive gas (O2)
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 350 to 450 kPa.
During leak test, the
pressure indicated by the
airway pressure gauge fails
to reach 30 cmH2O.
1. Before the leak test, the bellows is not
fully inflated.
2. The Y piece on the breathing tube is
not connected to the test plug.
3. The bellows housing is not properly
installed.
Check the connections of the
pneumatic circuit and re-install
the pneumatic circuit.

Mindray A7 Specifications

General

Type	Anesthesia Workstation
Brand	Mindray
Model	A7
Display	15-inch color touchscreen
Oxygen Flush	Yes
Gas Inlets	O2, N2O, Air
Ventilation Modes	SIMV, PSV
Breathing System	Integrated
Gas Monitoring	O2, CO2, N2O
Monitoring Parameters	FiO2
CO2 Monitoring	Mainstream or Sidestream
Power Supply	100-240 V, 50/60 Hz