Pulmonetic Systems LTV 950 - Page 211

Operator’s Manual LTV
®
Series ventilator Page 15-11
p/n 10664, Rev. Y
Symptoms Possible Causes What to Do
Low O
2
Source
incorrectly selected.
Verify that the Low O
2
Source is on when using a
low flow, low pressure source and off when using
a high pressure source. (See pages 6-13 and 6-
18 for information on using the Low O
2
Source
and O
2
% features.)
Failed calibration or
internal problem with
the ventilator.
Immediately contact a certified Pulmonetic
Systems’ service technician.
Continued…
O
2
% is high.
VHome setting does
not match flow valve.
Immediately contact a certified Pulmonetic
Systems’ service technician.
O
2
inlet flow too low
when Low O
2
Source
selected.
Verify the low pressure O
2
inlet has been
correctly calculated and set using the Input O
2
Flow Chart (see page 6-15).
Pulmonetic Systems recommends the use of an
O
2
monitor to verify delivered O
2
%. Adjust the
entrained O
2
flow so the monitored value shows
the desired FIO
2
. (See pages 6-13 and 6-18 for
information on using the Low O
2
Source and
O
2
% features.)
Failed calibration or
internal problem with
the ventilator.
Immediately contact a certified Pulmonetic
Systems’ service technician.
O
2
% is low.
VHome setting does
not match flow valve.
Immediately contact a certified Pulmonetic
Systems’ service technician.
Circuit leak. The LTV
®
Series ventilator does not actively
drive the exhalation valve to maintain PEEP. If
there is a significant leak, the PEEP will drop
over a long exhalation.
Run a leak test and reseat or replace the leaking
parts or connections. See page 11-8 for
instructions.
PEEP not working.
PEEP low.
PEEP sags during
exhalation.
PEEP spring not
installed in exhalation
valve.
Diaphragm incorrectly
seated in exhalation
valve.
Diaphragm installed
backwards.
Worn PEEP spring.
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 PEEP spring with a new
one.