5-1
CHAPTER 5
Troubleshooting
The table below lists the symptoms, possible causes, and recommended corrective actions for
problems that may be encountered while operating the Plus system. If the symptom is not
listed or if none of the recommended corrective actions solve the problem, contact technical support at
technical.services@tsi.com or customer support at 800-680-1220 or 651-490-2860 for assistance.
Interface module will not turn
on, or turns on and off.
Batteries depleted or
not installed.
Connect AC adapter or install
charged batteries.
Measurements are not
displayed even though
interface module is turned on.
Flow module is not connected
to the interface module.
Connect flow module to
interface module. If connected,
disconnect and then reconnect
Measurements not changing or
graph is not updating.
Press the play icon in the right
navigation bar.
Measurement is out of range.
Check range for displayed
measurement and only
make measurements within
that range.
Flow rate does not read zero
when no gas flowing, especially
when set to N
2
O or CO
2
.
Meter was not purged with
gas displayed on the
interface module.
Purge meter with gas displayed
on interface module or change
the gas type on the Certifier
test system to the desired gas.
Unable to disconnect flow
module from interface module.
Pulling on the cable rather than
the connector.
Pull the locking connector
(not the cable) to disengage
connector lock.
Pressure trigger gives
erroneous results.
Pressure signal supplied to
high-flow module is not correct.
Change source of pressure
signal. Pressure triggers are
optimized for use with high-
frequency ventilators.
Volume, minute volume, peak
flow, peak pressure, PEEP,
frequency, or I:E ratio
measurements are not updated
or incorrect.
Less than two consecutive full
breath have been supplied to
the flow module or flow is not
supplied as breath waveform.
Wait for at least two
consecutive full breaths to be
supplied to the flow module.
Auto-trigger is not optimized for
the current waveform.
Ensure that flow is supplied as
a breathing waveform. Manually
set the flow trigger levels.
Airway restrictor is causing
flow disturbance next to the
flow module.
Use TSI
®
airway pressure
fitting which contains a screen
between the flow module and
test lung.
Flow condition is causing
oscillations in the waveform.
Minimize the length of tubing
between the test lung and the
airway pressure fitting.
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