Mindray WATO EX-55, Service Manual

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5-7
Calibrate O2
Sensor L Last calibration of the O2
sensor failed. Or, O2
concentration was
measured outside of the
range. 1. Calibrate the O2 sensor again.
2. Replace the O2 sensor.
O2 Sensor
Unconnected L The O2 sensor was not
connected to the cable or
was not connected
properly. 1. Make sure that the O2 sensor is
connected to the cable correctly.
2. Replace the O2 sensor.
O2 Sensor Error M O2 sensor failure. The
measured O2 concentration
was less than 5%. 1. Calibrate the O2 sensor again.
2. Replace the O2 sensor.
Flow Sensor
Failure L The measured value by the
flow sensor exceeded the
range. Or, the zero point of
the pressure sensor was
abnormal.
Ventilator flow sensor
failure or sampling line
connection error. 1. Check if the zero point of the
flow sensor is normal.
2. Check if the measurement
performed by the flow sensor is
normal.
3. Replace the flow sensor and
perform calibration.
4. Replace the monitor board and
perform calibration.
TV Comp
Disabled L The measured value by the
flow sensor had a great
deviation in the VCV
mode. 1. Eliminate circuit leaks.
2. Judge the sensor measurement
status in the valves test tool.
3. Re-calibrate the flow sensor.
Pinsp Not
Achieved L In the PCV mode, the
inspiratory pressure was
less than the set inspiratory
pressure level for 6
consecutive breathing
cycles to some extent. 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 monitor board and
perform calibration.
TV Not Achieved L TVi was less than the set
value for 6 consecutive
breathing cycles to some
extent. 1. Check for breathing circuit leak.
2. Check the measurement accuracy
of the pressure sensor.
3. Perform calibration in case of
measurement failure.