Nellcor NPB-75, Service Manual

Page: 27 / 71

Section 5: Troubleshooting
5-4
Symptom Probable Cause Corrective Action
LED display
does not light
when the unit is
functioning.
The Power
Management option is
set at
LOW
.
Refer to the monitor’s
operator’s manual to
change the Power
Management option
to
NORMAL or
HIGH
.
An
LED display
has
failed.
Replace with new
LED display.
A CO
2
board component
has failed.
Replace with a new
CO
2
board.
Beeper does not
beep. The Pulse Tone option
on the Alarm Silence
menu has been
disabled. Turn the Pulse Tone
ON. Refer to the
monitor’s operator’s
manual.
One or more of the
Alarm Silence options
has been turned
OFF .
Turn the respective
alarm
ON . Refer to
the monitor’s
operator’s manual.
A CO
2
component has
failed.
Replace with a new
CO
2
board.
Table 5-2: Advisory Messages Guide
Message Probable Cause Corrective Action
Check Unit
!
A CO
2
board component
has failed.
Check Event
Messages screen in
Service Mode.
Check CO
2
!
Check SpO
2
! An SpO
2
board
component has failed.
Replace with a new
SpO
2
board.
Table 5-1: Troubleshooting Guide (Continued)