Mindray A7 Service Manual

A7™ Service Manual 046-006272-00 4 - 25
Calibration System Calibration
4.3.2.4 Commonly-encountered Problems and Recommended
Actions
Failure description Possible cause Recommended action
After [Begin] is
selected, no
ventilation sound is
heard. Very soon, the
prompt message of
[Calibration Failure!
Please try again.] is
displayed.
[Manual Vent.] is prompted. The Auto/
Manual ventilation switch is set to the bag
position.
Set the Auto/Manual ventilation
switch to the mechanical ventilation
position.
[Drive Gas Pressure Low] is alarmed. The
pressure indicated by the drive gas (O2)
pressure gauge is lower than 200 kPa.
Replace or connect the gas supplies
to make sure that drive gas pressure
is within specifications.
Zero point error occurs to the inspiratory/
expiratory flow sensor.
Replace the ventilator control board.
After [Start] is selected,
ventilation sound is
heard. Very soon, the
prompt message of
[Calibration Failure!
Please try again.] is
displayed.
The sampling line of at least one out of
the inspiratory flow sensor, expiratory
flow sensor and ventilator flow sensor is
not connected or is connected in the
reverse order.
Re-connect the sensor sampling
line.
The maximum flow to open the
inspiratory valve is less than 90 L/min.
Replace the expiratory valve
assembly.
1. The pneumatic circuit connection
between the anesthesia machine
calibration device and the ventilator
control board has an error.
2. The communication connection
between the anesthesia machine
calibration device and the anesthesia
machine has an error.
3. The settings of the anesthesia machine
calibration device have an error.
1. Check the pneumatic circuit
connection between the anesthesia
machine calibration device and the
ventilator control board. Re-connect
the pneumatic circuit if necessary.
2. Check the communication
connection between the anesthesia
machine calibration device and the
anesthesia machine. Or re-connect
them to ensure normal
communication. If the problem
persists, replace the communication
cable.
3. Check the settings of the
anesthesia machine calibration
device. Make settings again if
necessary.
About 15 minutes
after calibration is
started, the prompt
message of
[Calibration Failure!
Please try again.] is
displayed.
Calibration data are not correct.
Replace the inspiratory and
expiratory flow sensors and perform
calibration again. If calibration still
fails, replace the ventilator control
board.
When flow reaches 90 L/min, the counts
value of the inspiratory or expiratory flow
sensor is above3900, which is outside of
the normal range.
1. Replace the flow sensor in the
circuit.
2. Replace the ventilator control
board.
[00 00 00 02] is
displayed.
The drive gas pressure is too low.
1. Check the drive gas supply.
2. If there is no problem on the gas
supply, check the gas supply
pressure switch.
[00 00 00 04] is
displayed.
The Auto/Manual switch is on Manual
position.
1. Check if the operations are
performed as directed.
2. If so, check the Auto/Manual
switch.

Mindray A7 Specifications

General

Brand	Mindray
Model	A7
Category	Medical Equipment
Language	English