Covidien Nellcor GR101704, Service Manual

Page: 182 / 236

Troubleshooting
11-14 Service Manual
11.7
Alarm Issues
Alarm issues may be based on conflicting alarm limit settings or sensor problems.
Table 11-6. Alarm Issues
Problem Resolution
Alarms do not sound or do so
only faintly.
•
Check SOUND SETTINGS for the alarm volume setting.
•
Check SOUND SETTINGS for the pulse beep setting, then determine if
it registers a pulse beep, but not an alarm.
•
Check speaker wire connectivity to the MAIN PCB.
•
Replace the speaker, then the MAIN PCB.
The Pulse Search Indicator is lit
for more than 10 seconds
(before any measurements take
place).
•
Check the sensor Instructions for Use to confirm appropriate usage
and proper application. Check sensor and interface cable connections.
Test the sensor on another patient and/or try another sensor or inter-
face cable.
•
Perfusion may be too low for the monitoring system to track the pulse.
Check the patient. Test the monitoring system on someone else.
Change the sensor site. Try another type of Nellcor™ sensor.
•
Interference may be preventing the monitoring system from tracking
the pulse. Keep the patient still, if possible. Verify that the sensor is
securely applied and replace it if necessary. Change the sensor site.
Electromagnetic interference may be preventing the monitoring
system from tracking the pulse. Remove the source of interference
and/or try to stabilize the environment.
•
Use a type of sensor that tolerates more patient movement; for exam-
ple, a Nellcor™ adhesive sensor.
•
The sensor may be too tight, there may be excessive ambient light, or
the sensor may be on an extremity with a blood pressure cuff, arterial
catheter, or intravascular line. Reposition the sensor as necessary.