Datex-Ohmeda Anesthesia Delivery Unit S/5, Technical Reference Manual

Page: 379 / 494

Troubleshooting A-EV1
Document No. 8502855
C-53
Ventilator
communi-
cation
error
N/A Ventilator
communication broken
with the A-ELEC module.
Beware of the Ventilator
communication error
alarm will be a sub alarm
to Ventilator failure
alarm.
If alarm is single check
communication cable
between the A-EV1 and
A-ELEC.
Replace Digipower board
A-ELEC or Ventilator CPU
board.
pilot press err
“Low pilot press”.
On units with Main
SW <6.1 SW
During the A-EV1 Self-
test was the pilot
pressure outside the
specification range of
270 – 330 cmH
2
O. Note:
this range only applies to
Ventilator software
version 7.6 and onwards.
Calibrate pilot pressure
regulator.
Check pipeline gas
supply pressure.
Ventilator
*
failure
Sensor error Zero point out of range
Underflow or overflow of
sensor.
Replace sensor or zeroing
valve
x
Ventilator
*
failure
Press Compar err Comparison error
between circuit and
monitoring pressure
sensors
Check the circuit and
monitor sensor
calibration and replace if
needed
Ventilator
*
failure
Inspiration valve Inspiration valve has not
closed when expiration
starts
Replace valve x
Ventilator
*
failure
Expiration valve PEEP valve does not open
quickly enough
Replace valve or
membrane
x
Ventilator
*
failure
Expir valve 2 Expiration valve does not
open quickly enough
Replace valve or
membrane
Ventilator
*
failure
EEPROM error Calibration data lost
or
broken CPU board
Replace EEPROM and
recalibrate. Note that this
always happens when a
new EEPROM is started
for the first time
x
Ventilator
*
failure
AUTO/
MAN switch
Mode evaluated from
both micro switches
N/A
Message
in
Normal
Screen
Message in
diagnostic
page
Error condition /
possible cause
Recommended
action
Err
log