GE Carestation 620 User's Reference Manual page 137

Message Priority
Low gas sample Low
flow
Memory Low
(EEPROM)
failure
Module fail. No Medium
CO2, AA, O2
data.
Module not Low
compatible
Move Bag/Vent Medium
switch to Bag
MVexp high Medium
MVexp low Medium
N2O supply Medium
pressure low
N2O flow in Aux Medium
Gas mode
Negative airway High
pressure
No battery Medium
backup
No exp flow Medium
sensor
No insp flow Medium
sensor
O2 flow low Low
O2 flush stuck Low
on?
O2 monitoring not Medium
connected
O2 supply High
pressure low
PEEP high. High
Blockage?
2076152-001
Cause
Sample flow is less than 80% of
nominal flow for 20 seconds.
Software error.
Airway module hardware failure.
The monitoring module detected is not
compatible with system software.
Bag/Vent switch was in the Vent
position when the case was changed
from Aux O2+Air to circle mode.
MVexp is greater than MVexp high
alarm limit (for nine breaths and one
minute has elapsed).
MVexp is less than MVexp low alarm
limit (for nine breaths and one minute
has elapsed).
N2O pipeline pressure is less than 252
kPa (36 psi) and the N2O cylinder
pressure is less than 2633 kPa (381
psi).
N2O flow is lager than 100 ml/min
when system is in Aux gas mode.
Paw is less than -10 cmH2O.
Battery or charging failure.
Electrical signals show the flow sensor
is not connected.
Electrical signals show the flow sensor
is not connected.
The O2 flow is less than 150 ml/min.
Switch detected "on" continuously for
more than 30 seconds.
O2 cell not connected.
O2 pipeline pressure is less than 252
kPa (36 psi) and the O2 cylinder
pressure dropped below 2633 kPa
(381 psi) for one second.
Paw greater than or equal to sustained
limit for 15 seconds. See "Sustained
pressure threshold" section for more
information.
7 Alarms and troubleshooting
Action
Check for blockage in the airway
module sample gas line.
Contact an authorized service
representative.
Replace module.
Remove the incompatible module. Use
a compatible module.
Move switch to the Bag position.
Set the alarm limits appropriately.
Check the ventilation settings.
Set the alarm limits appropriately.
Check the ventilation settings.
Ensure the N2O pipeline and cylinder
are properly connected.
Ensure facility gas supply pressure is
within specification and the back up
cylinder is full and open.
Adjust N2O flow to less than 100 ml/
min.
Check for blockages in the patient
circuit.
Between cases turn the system off, then
back on after 15 seconds to reset the
system.
Connect the flow sensor. Replace the
flow sensor if necessary.
Connect the flow sensor. Replace the
flow sensor if necessary.
Adjust the O2 flow.
Check flush valve. Ensure flush valve is
not sticking.
Install airway gas module or connect the
O2 cell.
Ensure the O2 pipeline and cylinder are
properly connected.
Ensure facility gas supply pressure is
within specification and the back up
cylinder is full and open.
Check for blockages in the patient
circuit.
7-9