Troubleshooting
Efficia CM Series Service Guide 4-11
Troubleshooting Tables
Cardiac Output Problems
Navigation Wheel, Touch Screen, and Key Problems
Symptom Possible Cause Action
The C.O. measurements are not
reliable.
The blood temperature is
incorrect.
Verify the C.O. module is
calibrated. See “Cardiac Output
Test (C.O.)” on page 3-24.
Verify the cable connections.
Replace the cable.
Consider whether the catheter
should be replaced.
The injectate temperature is
incorrect.
Verify the correct injectate
temperature is entered. See
the Efficia CM Series Patient
Monitors Instructions for Use.
Replace the injectate
temperature probe.
The difference between the
blood temperature and the
injectate temperature is not
wide enough.
Consider using iced injectate.
See the Efficia CM Series
Patient Monitors Instructions
for Use.
The wrong computation
constant is being used.
Verify that you are using the
correct computation constant
for the catheter that you are
using and the corresponding
injectate volume and
temperature. See the
instructions for use supplied
with the catheter.
Symptom Possible Cause Action
The monitor does not respond
to the navigation wheel or
front panel keys.
The main board has a faulty
connection.
Ensure that all connectors to
the main board are seated
correctly.
The monitor does not respond
to the touch screen.
The touch screen is locked. On the System Menu, select the
Unlock Touch Screen button.
See “Accessing the Admin
Functions” on page 3-5.
The touch screen is not
calibrated.
Calibrate the touch screen. See
“Calibrating the Touchscreen”
on page 4-16.
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