Operational Performance - Nellcor OxiMax N-600x Service Manual

Troubleshooting

Operational Performance

68
Table 10 lists symptoms of problems relating to operational performance (no error
codes displayed) and recommended actions. If the action requires replacement of
a PCB or module, refer to Disassembling the Monitor on page 85.
Table 10: Operational Performance Problems
Symptom
The Pulse Amplitude
indicator seems to
indicate a pulse, but
displays zeroes.
%SpO or Pulse values
2
change rapidly; Pulse
Amplitude indicator is
erratic.
Recommended Action
O M
• The sensor may be damaged; replace
XI AX
the sensor.
• If the condition persists, replace the Main Board
PCB. See Main Board PCB Replacement on
page 97.
O M
• The sensor may be damp or may have
XI AX
been reused too many times. Replace the sensor.
• An electrosurgical unit (ESU) may be interfering
with performance:
monitor
- Move the
O M
sensors as far from the ESU as
XI AX
possible.
monitor
- Plug the
ESU into different AC circuits.
- Move the ESU ground pad as close to the
surgical site as possible and as far away
O
from the
XI
• Verify the performance with the procedures
detailed in Performance Verification on page 15.
• If the condition persists, replace the Main Board
PCB. See Main Board PCB Replacement on
page 97.
and its cables and
power supply and the
M
sensor as possible.
AX