Page 15-8 LTV
®
Series ventilator Operator’s Manual
p/n 10664, Rev. Y
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 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.
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 and spring.
Reseat the spring and diaphragm valve and snap
the peep valve back in place. See page 13-11 for
a diagram of correct exhalation valve assembly.
If necessary, replace the exhalation diaphragm,
PEEP spring or exhalation valve with a new one.
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.
Leak Compensation is
not on.
Verify that the Leak Compensation extended
features option is set to On (default setting is on).
See page 10-12 for instructions.
Failed autozero. Perform an autozero under XDCR ZERO. See
page 10-23 for more information.
Continued…
Delivered pressure is
low, PEEP is low,
ventilator is
autocycling.
Delivered pressure is
low.
Monitored pressure is
low.
Failed calibration or
internal problem with
the ventilator.
Immediately contact a certified Pulmonetic
Systems’ service technician.
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