www.masimo.com 19 Masimo
Chapter 4: Troubleshooting
Troubleshooting NomoLine ISA CO2
Symptom Possible Cause Correction
NomoLine ISA
CO2 values are
not displayed on
host monitor
• NomoLine ISA CO2
requires a power cycle
• Host device is not
configured correctly or is
incompatible with
NomoLine ISA CO2
• Disconnect and reconnect the
NomoLine ISA CO2 connector at
the host device.
• Verify that the host device is
correctly configured and
compatible with NomoLine ISA
CO2.
LEGI indicator is
dark (indicator is
off)
• NomoLine ISA CO2 is not
plugged in to the host
monitor connector
• Sampling line not plugged
in to NomoLine ISA CO2
completely
• Internal error
• Verify NomoLine ISA CO2
connection to the host monitor.
• Disconnect and reconnect the
sampling line to NomoLine ISA
CO2.
• The NomoLine ISA CO2 requires
service. See Service and Return
Procedure.
LEGI indicator
blinking red
• Sampling line obstructed
(occlusion)
• Inspect sampling line for
occlusion (blockage, kink in line).
• Replace sampling line. See
Sampling Line Replacement on
page 14.
LEGI indicator
steady red
• NomoLine ISA CO2
requires a power cycle
• Internal error
• Disconnect and reconnect the
NomoLine ISA CO2 connector at
the host device.
• If persistent, the NomoLine ISA
CO2 requires service. See Service
and Return Procedure.
• A hardware error is
generated during the
warm up period after being
stored at −40°C