CareFusion LTV 1200 Service Manual page 98

Symptoms
Condensation in sense
lines.
Ventilator is on, gas is
not delivered and
turbine is running.
Ventilator is on, gas is
not delivered and
turbine is not running.
RT XDCR DATA item
TS shows speeds at or
near 0.
Sense line connectors
wobble or loose.
p/n 18603-001, Rev. J
Possible Causes
High or low sense lines are
occluded.
High or low sense ports in
the wye are occluded.
Defective purge solenoids.
Defective or disconnected
flow valve.
Defective turbine.
Defective or disconnected
solenoids.
Defective or disconnected
turbine.
Defective motor board.
Defective power board.
Fitting connectors loosened
inside ventilator case.
®
LTV 1200, 1150, and 1100 Ventilator Service Manual
What to Do
Verify lines are not occluded or pinched
and/or clear the lines with a low flow (less
than 10 Lpm) gas source.
Replace the solenoid manifold. See
Solenoid Manifold Assembly in Chapter 8
for instructions.
Using the Vent Maintenance mode SERVO
test, determine if the turbine and flow valve
are working correctly by changing the
Turbine Speed, Flow, and Step Motor
Positions.
Verify all turbine and flow valve cables are
connected and all flexible tubes connected
to the analog board and solenoid manifold
are correctly and securely connected.
Perform the Advanced Vte Diagnostic
Procedures, see page 7-23.
Using the Vent Maintenance mode
SOLENOID test, determine if all solenoids
are working correctly.
Perform the Advanced Vte Diagnostic
Procedures, see page 7-23.
The SERVO test may be used to set the
turbine speed explicitly. (See Chapter 6 -
Maintenance & Calibration for instructions
on using the servo test.) The turbine speed
can be viewed using the RT XDCR DATA
display. (See Chapter 3 - Real-Time
Transducer Data for instructions on using
RT data.)
Verify all flow valve and turbine power
cables are connected. Verify all flexible
tubes connected to the analog board and
solenoid manifold are correctly and
securely connected.
Replace the turbine. See Flow Valve
Assembly or Turbine Manifold in Chapter 8
for instructions.
Replace the motor board. See Motor
Board Assembly in Chapter 8 for
instructions.
Replace the power board. See Power
Board Assembly in Chapter 8 for
instructions.
Open the ventilator case and tighten the
nuts on the sense line and drive line
connectors. See Back Panel in Chapter 8
for instructions on opening the ventilator.
Page 7-21