Mindray A5 Service Manual

A5/A3™ Service Manual 046-001141-00 5 - 11
Repair and Troubleshooting Technical Alarms Check
Pinsp Not Achieved Low
In pressure mode,
Pinsp is less than 2/3
of its setting value
(setting value is
greater than 9cmH2O)
or less than setting
value-3cmH2O
(setting value is less
than 9cmH2O) for 6
cycles continuously.
1. Check for breathing circuit leakage.
2. Check the measurement accuracy of the pressure sensor.
3. Perform calibration in case of measurement failure.
4. Replace the ventilator control board and perform calibration.
Vt Not Achieved Low
TVi is less than TV
setting value for 6
cycles continuously
for over 20% or 50ml,
whichever is greater.
1. Check for breathing circuit leak.
2. Check the measurement accuracy of the pressure sensor.
3. Perform calibration in case of measurement failure.
Patient Circuit Leak Med
1. Pressure less than
2cmH2O for 30s
continuously during
mechanical
ventilation.
2. Patient not
connected.
1. Check the breathing circuit connections and flow sensor
connections.
2. Check the tidal volume measurement accuracy of the sensor.
3. Check for breathing system leakage.
CO2 A bsorber
Canister Not Locked
High
CO2 Ca nister Not
Mounted
1. Re-mount the CO2 absorber canister.
2. Check the cable connected between the CO2 absorber canister and
the ventilator control board. Replace the cable if necessary.
3. If the problem persists, replace the ventilator control board.
4. If the problem persists, replace the switch on the CO2 abso rber
canister.
O2 Sensor
Disconnected
Low
O2 Sensor
Disconnected
1. Make sure that the O2 sensor is connected to the cable correctly.
2. Check the voltage O2 sensor outputted in calibration menu.
3. Replace the O2 sensor.
Replace O2 sensor Med
The O2 value is less
than 5%
1. Check the voltage O2 sensor outputted in calibration menu.
2. Calibrate the O2 sensor again.
3. Replace the O2 sensor.
Calibrate O2 Sensor Low
O2 value is greater
than 110% or
between 5% and
15% for 3 seconds.
1. Calibrate the O2 sensor again.
2. Replace the O2 sensor.
Ventilator Comm
Stop
High
Lost communication
with CPU board for
10 seconds.
1. Restart the machine.
2. Re-plug or replace the communication cable between the CPU
board and the ventilator control board.
3. If the problem persists, replace the ventilator control board.
4. If the problem persists, replace the CPU board.
Drive Gas Pressure
Low
High
Drive Gas Pressure
Low
1. Check the status of actual gas supply to confirm if the alarm is in
compliance with the actual status.
2. Short circuit the pressure switch and the alarm regarding outputted
signals should disappear. Otherwise, it indicates that the pressure
switch is defective. Replace the pressure switch. Otherwise, check the
connection between the pressure switch and the ventilator control
board and check the socket.
3. If the above two items are within specifications, replace the
ventilator control board.
O2 Supply Failure High O2 Supply Failure
Use the same method to drive gas pressure low to check the O2
pressure switch. If this message occurs when using tanks as the gas
supply source, check that the O2 regulator is within specifications and
calibrate it as required.
Message Priority Cause Solution

Mindray A5 Specifications

General

Brand	Mindray
Model	A5
Category	Medical Equipment
Language	English