Product Manual

Troubleshooting
N-560 Operator’s Manual 77
• If the N-560 is operating on AC power, the fuse may be
blown. Notify service personnel to check and, if necessary,
replace the fuse.
• If the N-560 is on battery power, the battery fuse may require
replacement, the battery may be missing, or the battery may
be discharged. Charge the battery or notify service personnel
to replace the battery or the battery fuse, as required.
2. One or more display segments or indicators do not light during
the power-on self-test.
• Do not use the N-560;
contact qualified service personnel or
your local Nellcor representative.
3. The N-560 does not sound a tone indicating successful
completion of the Power
-On Self-Test (POST).
• The N-560 has failed the power-on self-test. Do not use the
N-560
. This tone not only indicates the successful completion
of POST, but it confirms that the audible alarm is functional.
Contact qualified service personnel or your local Nellcor
representative.
4. The Pulse Search indicator is lit for mor
e than 10 seconds while
the sensor is connected to the patient.
• Check the sensor directions for use
to determine if an
appropriate sensor is being used and if it is applied properly.
Check sensor and sensor cable connections. Test the sensor
on someone else. Try another sensor or sensor cable.
• Perfusion may be too low for the N-560 to track the pulse.
Check the patient. Test the N-560 on someone else. Change
the sensor site. Try another type of sensor.