Operational Performance; Table 8: Operational Performance Problems - Nellcor OxiMax N-595 Service Manual

Troubleshooting

Operational Performance

56
Table 8 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 Disassembly Guide on page 63.

Table 8: Operational Performance Problems

Symptom
The Pulse Amplitude
indicator seems to
indicate a pulse, but the
digital displays show
zeroes.
SpO or Pulse values
2
change rapidly; Pulse
Amplitude indicator is
erratic.
Recommended Action
• The OXIMAX sensor may be damaged; replace it.
• If the condition still persists, replace the User
Interface PCB. See User Interface PCB
Removal/Replacement on page 76.
• The OXIMAX sensor may be damp or may have
been reused too many times. Replace it.
• An electrosurgical unit (ESU) may be interfering
with performance:
- Move the N-595 and its cables and OXIAX
sensors as far from the ESU as possible.
- Plug the N-595 power supply and the ESU
into different AC circuits.
- Move the ESU ground pad as close to the
surgical site as possible and as far away
from the OXIMAX sensor as possible.
• Verify the performance with the procedures
detailed in Performance Verification on page 11.
• If the condition still persists, replace the User
Interface PCB. See User Interface PCB
Removal/Replacement on page 76.