Mindray A7 Service Manual

A7™ Service Manual 046-006272-00 4 - 43
Calibration System Calibration
4.3.3.2 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.
[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 enough.
Zero point error occurs to the airway
pressure gauge or PEEP pressure sensor.
Refer to ‘‘Check the Sensor Zero Point’’
on page 3-24.
Replace the ventilator control board.
After [Begin] 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 airway pressure sensor and PEEP
pressure sensor is not connected or is
connected improperly. Refer to ‘‘Sensors
and Valves Problems’’ on page 5-71.
Re-connect the sensor sampling line.
The maximum pressure which the PEEP
valve produces is less than 95 cmH2O.
Refer to ‘‘Sensors and Valves Problems’’
on page 5-71.
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. Refer to
‘‘Check the Pressure Sensor Accuracy’’
on page 3-28.
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.
[00 00 00 08] is displayed.
Zero point error occurs to the airway
pressure sensor.
1. Check the zero point.
2. Replace the board.
[00 00 00 10] is displayed.
Zero point error occurs to the PEEP
pressure sensor.
1. Check the zero point.
2. Replace the board.
[00 00 00 20] is displayed.
Measurement range error occurs to the
airway pressure sensor.
1. Check the tube and air-tight connection.
2. Check the supply gas pressure.
3. Check the settings of the calibration
device.
4. See section 5.4 (pg. 5-71) "Sensors and
Valves Problems".
5. Replace the board.

Mindray A7 Specifications

General

Brand	Mindray
Model	A7
Category	Medical Equipment
Language	English