Page 7-18 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
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.
Diaphragm incorrectly
seated in exhalation valve.
Diaphragm installed
backwards.
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.
High side sense line or
elbow at patient wye loose
or leaking.
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.
Failed calibration. The monitored PEEP can be viewed using
the RT XDCR DATA display. (See Real-
Time Transducer Data in Chapter 3 for
instructions on using RT data.). If the
monitored PEEP is significantly different
from the actual PEEP, the calibration may
be off or the transducers may not be
working correctly.
Recalibrate the vent. See Chapter 6 -
Maintenance & Calibration for instructions.
If the problem reoccurs after careful
recalibration, a transducer may be drifting
excessively. Perform the Advanced Vte
Diagnostic Procedures, see page 7-23.
Perform the Advanced Vte Diagnostic
Procedures, see page 7-23.
Defective analog board.
Replace the analog board. See Analog
Board Assembly in Chapter 8 for
instructions.
Defective solenoid mount
assembly.
Replace the solenoid mount assembly.
See Solenoid Mount Assembly in Chapter
8 for instructions.
PEEP not working.
PEEP low.
PEEP sags during
exhalation.
Defective accumulator. Replace the accumulator. See
Accumulator in Chapter 8 for instructions.
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