CareFusion LTV 1200 Service Manual page 87

Symptoms
CONTINUED ...
Monitored volume is
low.
Delivered volume is
low.
Page 7-10
Possible Causes
Leak Compensation is not
on.
Failed auto zero.
Bypass flexible tube
pinched.
Pinhole leaks in bypass
flexible tube.
VHome setting does not
match flow valve.
Failed calibration.
Defective flow valve.
Defective turbine.
®
LTV 1200, 1150, and 1100 Ventilator Service Manual
What to Do
Verify that the Leak Compensation
Extended Features option is set to On
(default setting is on). See the LTV
1150, or 1100 Ventilator Operator's
Manual for more information.
Perform an auto zero under XDCR ZERO.
®
See the LTV 1200, 1150, or 1100
Ventilator Operator's Manual for more
information.
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.
Correct the VHome setting. See Chapter 6
- Maintenance & 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.
Calibrate the flow valve. See Flow Valve
Calibration in Chapter 6 for instructions.
Clean the Flow Valve following the Flow
Valve Cleaning Procedure, see page 8-66.
Perform the Advanced Vte Diagnostic
Procedures, see page 7-23.
If testing and cleaning fails, replace the
Flow Valve. See Chapter 8 - Flow Valve
Assembly and Cleaning Instructions.
Perform the Advanced Vte Diagnostic
Procedures, see page 7-23.
If testing fails, replace the turbine. See
Chapter 8 - Turbine Manifold.
®
1200,
p/n 18603-001, Rev. J