Page 7-14 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
Symptoms Possible Causes What to Do
High or low side sense line
or elbow at patient wye
loose or leaking.
High or low sense lines are
occluded.
High or low sense ports in
the wye are occluded.
Check high and low pressure sense lines
to be sure they are correctly attached and
securely seated at both the ventilator and
wye ends.
Check the Luer fitting connections for
leaks.
Check the elbow connectors at the wye to
be sure they are not loose or broken.
Verify lines are not occluded or pinched.
Check the exhalation drive line at both the
ventilator and exhalation valve ends.
Verify the line is securely seated and not
leaking.
Failed auto zero. Perform an auto zero under XDCR ZERO.
See the LTV
®
1200 or the LTV
®
1150
Ventilator Operator's Manual for more
information.
VHome setting does not
match flow valve.
Correct the VHome setting. See Chapter 6
- Maintenance & Calibration.
Failed calibration. Recalibrate the vent. See Chapter 6 -
Maintenance & Calibration for instructions.
If the problem reoccurs after careful
recalibration, a transducer may be drifting
excessively. Replace the analog board.
See Analog Board Assembly in Chapter 8
for instructions.
Internal flexible tubing
occluded or pinched.
Internal flexible tubing has
pinhole leaks or leaking at
connections.
This problem will often be accompanied
by XDCR FAULT alarms. Open the vent
and verify that none of the flexible tubes
connected to the solenoid manifold or
analog board are pinched or leaking. See
Solenoid Manifold Assembly or Analog
Board Assembly in Chapter 8 for a routing
diagram.
Defective flow valve. Calibrate the flow valve. See Flow Valve
Calibration in Chapter 6 for instructions.
Perform the Advanced Vte Diagnostic
Procedures, see page 7-23.
Delivered flow is high.
Delivered flow is low.
Defective turbine. Replace the turbine manifold. See Turbine
Manifold in Chapter 8 for instructions.
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