Nellcor NPB-75, Service Manual

Page: 28 / 71

Section 5: Troubleshooting
5-5
Table 5-3: Event Messages
Event Message Probable Cause Corrective Action
CO
2
board A CO
2
board component
failed.
Replace with a new
CO
2
board.
SpO
2
board Replace with a new
SpO
2
board.
Flow - Loose connections
- Kinks or twists in
tubing
- Flow system blocked
- Inspect all tubing
ends for loose
connections and
ensure tight
connections
- Straighten kinks
and undo any twists
in the tubing.
- Check flow rate and
if necessary change
Flow System.
- Pump Malfunction - Replace pump
- A CO
2
board
component has failed
- Replace with a new
CO
2
board