Datex-Ohmeda Aestiva 7900 SmartVent, Техническое справочное руководство

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5 Troubleshooting
5-12 05/04 1006-0453-000
Display
Voltage Out-
of-Range Minimum
Shutdown
(6)
Display voltage out-of-
range Check the VEL supply from service mode
under Display A/D channels. Verify that the
Counts value is between 1645 and 2675.
For machines with original CPU:
If not in range, measure the VEL supply on CPU
board at TP5 referenced to ground at TP1 (10
to 15.23 volts). If this voltage is in range,
replace the CPU board because the problem is
in the A/D channel.
If the VEL supply is not in range, remove
Display to CPU cable and re-test. If in range,
replace the display.
If not in range, measure VEL supply on Power
Supply board at TP22 referenced to ground at
TP16 (10 to 15.23 volts). If not in range then
remove power supply to CPU cable and re-test.
If still not in range, replace the power supply
board.
If voltage is in range on the power supply
board, replace the CPU board.
For machines with Integrated CPU:
If not in range, (Refer to section 5.6.3)
measure the VEL supply on CPU board at
TP213 referenced to ground at TP12 (10 to
15.23 volts). If this voltage is in range, replace
the CPU board because the problem is in the
A/D channel.
If the VEL supply is not in range, remove
Display to CPU cable and re-test. If in range,
replace the display.
If still not in range, replace the CPU.
Exp Flow
Sensor Fail User Alarm The system cannot read
the calibration data
stored in the sensor. Operation continues
with default values. Replace the flow sensor.
Exp Reverse
Flow
(5) medium
(1) In-range flow data
available in mechanical
ventilation Negative flow on
expiratory sensor during
inspiration in circle
system Check flow sensor connections for “No Flow
Sensor” alarm.
Check the breathing circuit
Perform flow sensor calibration.
Check insp/exp check valves.
Replace the flow sensors.
Check SIB to CPU cabling.
Replace the SIB board.
Replace the CPU board.
Two consecutive breaths measured with “correct”
flow seen by flow sensors
Message Alarm type/
Priority Enabling Criteria Alarm Condition Service Repair
Removal Criteria