Datex-Ohmeda Aestiva 7900 SmartVent, Technical Reference Manual

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5 Troubleshooting
5-28 05/04 1006-0453-000
5.5.3 Inaccurate volume ventilation troubleshooting
Start
Calibrate Flow
Sensors
Problem
continues?
Sensor Problem:
Examine for defect or water plug
in lines. Ensure customer is
periodically depressing drain
button to empty water trap.
No
Perform the Flow
Sensor Leak test
Yes
Do Bit counts on
either Insp/Exp Flow
channel vary more
than 10 from the
inital zero counts?
No
Inspect pneumatic
lines for leaks or
water plugs between
flow sensor and SIB
Yes
Inspect Breathing
Circuit check valves.
Replace seat and
disks as necessary.
Water, leaks
or kinks?
Yes
Correct kinks or
leaks. Replace
harness if necessary.
Switch Insp and Exp
pneumatic connections
and repeat previous test
Problem
moves to
other sensor
channel?
Replace bulkhead
harness
Perform All
Calibrations and
Re-evaluate
Yes
Replace SIB
No
Perform All
Calibrations and
Re-evaluate
Problem
Continues?
Perform All
Calibrations and
Re-evaluate
Problem Solved:
Perform All Calibrations
Yes
Perform All
Calibrations and
Re-evaluate
Problem
continues?
Yes
No Done
Verify pass?
Yes
No
No
No
AB.29.093
Section 4