Covidien Nellcor PM10N Service Manual page 88

Troubleshooting
Error condition by category
Patient data / USB data port
Questionable readouts of patient
physiological measurements;
wrongly tagged or missing
patient data
USB data port does not function
properly.
5-4
Table 5-1. Error Conditions and Resolutions (Continued)
Cause or checkpoint
Sensor not attached correctly.
Sensor is malfunctioning.
Electromagnetic interference.
Ambient light interfering with
proper sensing.
Coin cell battery was removed from
main board.
WARNING: Replacing the coin cell
battery for the main board resets the
monitoring system's date and time
settings. Integrity of existing patient
data will be questionable.
USB cable not firmly connected.
Covidien bridge driver corrupted.
Mismatched baud rates between
monitoring system and PC.
Mismatched COM port between PC
and the HyperTerminal™* program.
USB port damaged.
Main board failure.
Corrective action
Check all connections and reposition if
necessary.
Replace sensor or cable.
Remove sources of electromagnetic interference
(electrosurgical device, cell phone).
Remove excessive ambient light.
Replace coin cell battery with known good
battery.
Delete monitoring history.
Set date and time for locale and time zone.
Ensure USB cable is firmly connected.
Disconnect USB cable, reset system power, then
reconnect.
Re-install the bridge driver provided by Covidien.
Ensure baud rate settings for both monitoring
system and PC are the same.
Ensure same COM port is selected on PC and the
HyperTerminal™* program or other data
transmission tool.
Ensure there is no physical damage to USB port.
If damaged, replace main board.
Replace the main board.
Service Manual