LTV 1150 - Page 88

Page 7-10 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
Symptoms Possible Causes What to Do
Leak Compensation is not
on.
Verify that the Leak Compensation
Extended Features option is set to On
(default setting is on). See the LTV
®
1200
or the LTV
®
1150 Ventilator Operator's
Manual for more information.
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.
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.
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.
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.
CONTINUED …
Monitored volume is
low.
Delivered volume is
low.
Defective turbine. Perform the Advanced Vte Diagnostic
Procedures, see page 7-23.