CareFusion LTV 1200 Service Manual page 110

Symptoms
Ventilator won't
exhale, repeated
HIGH PRES alarms,
turbine stops and
pressure drops, then
auto cycles up to
HIGH PRES again.
Repeated
DISC/SENSE alarms.
p/n 18603-001, Rev. J
Possible Causes
Diaphragm installed
backwards or incorrectly
seated in exhalation valve.
Sense lines occluded,
pinched or reversed.
Internal flexible tubing
occluded or pinched.
Internal flexible tubing has
pinhole leaks or leaking at
connections.
Defective exhalation drive
solenoid.
Circuit disconnected from
patient, wye or vent.
Exhalation valve
disconnected from wye.
High or low side sense
lines disconnected from
vent or wye or are
inappropriately attached.
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.
®
LTV 1200, 1150, and 1100 Ventilator Service Manual
What to Do
Open the exhalation valve and remove the
diaphragm. Reseat the diaphragm and
snap the valve cap back in place. See
Cleaning the Reusable Exhalation Valve
and Patient Circuit in Chapter 4 for a
diagram of the exhalation valve assembly.
Check high and low pressure sense lines
to be sure they are correctly attached and
securely seated at both the ventilator and
wye ends.
Verify lines are not occluded, pinched or
reversed.
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 routing
information.
Replace the solenoid manifold. See
Solenoid Manifold Assembly in Chapter 8
for instructions.
Check the circuit and exhalation valve to
verify the circuit is securely connected and
the valve is intact. Open the exhalation
valve and remove the diaphragm. Reseat
the diaphragm and snap the valve cap
back in place. See Cleaning the Reusable
Exhalation Valve and Patient Circuit in
Chapter 4 for a diagram of the exhalation
valve assembly.
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, pinched or
reversed
Check the exhalation drive line at both the
ventilator and exhalation valve ends.
Verify the line is securely seated and not
leaking.
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