LTV 1150 - Page 93

p/n 18603-001, Rev. C LTV
®
1200/1150 Ventilator Service Manual Page 7-15
Symptoms Possible Causes What to Do
Circuit leak. Run a Leak Test and reseat or replace the
leaking parts or connections. See
Leak Test in Chapter 2 for instructions.
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, they may not seal correctly
when replaced. Replace the patient wye
and sense lines with a known good
assembly.
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 have not loosened or been
broken loose.
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.
Pressure Control or
Pressure Support set
below PEEP.
Verify the control values are appropriately
set.
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.
Leak Compensation is not
on.
Verify that the Leak Compensation Extended
Features
option is set to On (default setting
is off). See the
LTV
®
1200 or the LTV
®
1150
Ventilator Operator's Manual for more
information.
Sensitivity does not
appear to be accurate.
Ventilator is auto
cycling.
Bypass flexible tube
pinched.
Pinhole leaks in bypass
flexible tube.
If the bypass flexible tube is pinched, it
can usually be seen pressed against the
louver openings in the bottom of the
ventilator case.
Open the ventilator and remove the back
panel. Replace the back panel being sure
to fit the louvers in between the upper and
lower loop of the bypass flexible tube
before seating the back cover.
If the bypass flexible tube is leaking,
replace it.