LTV 1150 - Page 87

p/n 18603-001, Rev. C LTV
®
1200/1150 Ventilator Service Manual Page 7-9
Symptoms Possible Causes What to Do
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.
CONTINUED…
Monitored volume is
high.
Delivered volume is
high.
Defective turbine.
Defective bypass valve.
Defective or leaking
solenoid manifold.
Perform the Advanced Vte Diagnostic
Procedures, see page 7-23.
Circuit leak. Run a Leak Test and reseat or replace the
leaking parts or connections. See
Leak Test in Chapter 2 for instructions.
High or low side sense line
or elbow at exhalation
valve 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 have not loosened or been
broken loose.
Verify lines are not occluded or pinched.
Exhalation drive line leaking
or loose.
Exhalation valve leaking
during inspiration.
Check the exhalation drive line at both the
ventilator and exhalation valve ends. Verify
the line is securely seated and not leaking.
Verify the exhalation valve is not leaking
during inspiration. If it is leaking, open the
exhalation valve and remove the
diaphragm. Reseat the diaphragm and
snap the valve cap back in place. See
Cleaning the Exhalation Valve and
Reusable Patient Circuit in Chapter 4 for a
diagram of the exhalation valve assembly.
If necessary, replace the exhalation
diaphragm, or exhalation valve with a new
one.
Monitored volume is
low.
Delivered volume is
low.
Sense lines are reversed. The sense lines are not designed to be
removed from either the wye or the Luer
fittings. If the sense lines have been
removed and replaced incorrectly, they
may not seal correctly when replaced.
Replace the patient wye and sense lines
with a known good assembly.