10-4
Mainstream ETCO
2
Solutions (Prism Only)
Problem Possible Causes Action/Solution
NO SENSOR message. Sensor not connected. Confirm proper sensor
connection.
LOW SIGNAL message. Airway adapter obstructed. Check airway adapter for
obstruction. Use another airway
adapter.
OCCLUSION message. Particulate matter obstructing
airway.
Check airway adapter for
obstruction. Use another airway
adapter.
BAD SENSOR message. Sensor not functioning properly. Try sensor with different
monitor. If problem persists,
replace sensor.
CO2 ERROR message. Hardware problem with ETCO
2
. Contact MDE Technical
Support.
WARM UP message. Sensor has not warmed to 42
o
C.
Allow sensor to warm up prior
to ETCO
2
monitoring.
Sidestream ETCO
2
Solutions (Prism Only)
Problem Possible Causes Action/Solution
NO SENSOR message. Pump not operative. Try sensor with another monitor.
If problem persists, replace
sensor.
NO FILTER message. No watertrap filter. Insert watertrap filter into
sidestream module.
FILT OCCU message. Filter obstructed. Replace watertrap filter.
EXH OCCLU message. Exhaust obstructed. Clear exhaust of any obstruction.
LOW SIGNAL or OCCLUSION
message.
Watertrap flow restricted or
pump inoperative.
Exhaust/scavenger port flow
impaired.
Check tubing for kinks or
blockage. Replace tubing if
necessary. Replace watertrap if
message persists.
Move objects away from exhaust
port or check scavenger tubing.
BAD SENSOR message. Sensor not functioning properly. If possible, try sensor with
another monitor. If problem
persists, replace sensor.
PUMP ERR message. Hardware error. Contact MDE Technical
Support.
5V FAULT message. Hardware error. Contact MDE Technical
Support.
CO2 COMM message. Hardware error.
Contact MDE Technical
Support.
CO2 ERROR message. Hardware error.
Contact MDE Technical
Support.
WARM UP message. Sensor has not finished warming
up to 42
o
C.
Allow sensor to warm up prior
to ETCO
2
monitoring.
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