Page 7-12 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
Symptoms Possible Causes What to Do
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.
VHome setting does not
match flow valve.
Correct the VHome setting. See Chapter 6
- Maintenance & Calibration.
Failed calibration. 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.
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.
Internal flexible tubing
occluded or pinched.
Internal flexible tubing has
pinhole leaks or leaking at
connections.
This problem will often be accompanied
by XDCR FAULT alarms. Open the vent
and verify that none of the flexible tubes
connected to the solenoid manifold or
analog board are pinched or leaking. See
Solenoid Manifold Assembly or Analog
Board Assembly in Chapter 8 for routing
information.
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.
Defective turbine.
Defective analog board.
Perform the Advanced Vte Diagnostic
Procedures, see page 7-23.
CONTINUED …
Delivered pressure is
low, PEEP is low,
ventilator is auto
cycling.
Delivered pressure is
low.
Monitored pressure is
low.
Defective power board.
Replace the power board. See Power
Board Assembly in Chapter 8 for
instructions.
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