Maintenance and Calibration
43
Display message Cause Corrective action User
Corrective action
Service technician
Valve Error: Use Manual
Ventilation
Call Service
AVM3-2 CMV/ PCV
The actual internal flow value
should be 0 during expiration
Finish the case with manual
ventilation;
Take the machine out of use;
Call Service
Recalibrate the proportional
valve, internal flow sensor and
the characteristic of the
proportional valve. If that does
not solve the problem,
exchange the
1. proportional valve
2. internal flow sensor
Calibrate Breathing
System
Perform Compliance Test
when convenient
AVM3-2 CMV, PCV
Difference between the set and
the detected state of each
solenoid valve for more than
200 ms
The intermitting tone is reset via
the mute button
(acknowledgement)
Reset the error message via
the compliance test
Check the correct voltage
supply for the solenoid vales. If
that does not solve the problem
exchange the according
solenoid valve
Pressure Reading out of
tolerance
Perform Compliance Test
when convenient
AVM3-1, AVM3-2
A difference between the two
pressure sensors of more than
10 mbar
The intermitting tone is reset via
the mute button
(acknowledgement)
Reset the error message via
the compliance test
Recalibrate the pressure
sensors and check the
according tubing. If that does
not solve the problem exchange
the module 2
No drive gas; please
check
AVM3-1
Monitoring of the pressure
switch for the driving gas
Ensure the driving gas supply,
restart the ventilation on
request.
Check the gas supply, the
correct tubing and the correct
connection and function of the
pressure switch
Flow/Volume Readings
not available
Replace Flow Sensor –
Call Service
AVM3-1 during ventilation
External flow sensor is broken
or short-circuited
The intermitting tone is reset via
the mute button
(acknowledgement)
Reset the error message via
the compliance test
Exchange the external flow
sensor
A P N E A
AVM3-1. Manual/ spontaneous
Within a period of 15 to 60
seconds a expiration cannot be
detected
Create expiration Ensure the correct function of
the circle system
Breathing Circuit
Disconnect
AVM3-1 CMV, (S)CMV, PCV
The peak pressure PPEAK is
lower than 0.5 mbar and lower
then the set pressure limit Pmin
Create a pressure increase in
the inspiration phase
Ensure the correct function of
the circle system and the
correct electrical and pneumatic
function of the solenoid valves
PEEP greater than Pmin
AVM3-1 CMV, (S)CMV, PCV
The end expiratory pressure is
greater than the set pressure
limit Pmin
Lower the end expiratory
pressure or raise the pressure
limit Pmin
Check the correct position and
function of the APL valve.
Ensure the correct function of
the circle system
FiO2 lower than FiO2
min
AVM3-1
The measured O2 value is
lower than the set O2min limit
Increase the O2 value or raise
the limit O2min
Recalibrate and check the
correct function of the O
2
cell.
Exchange if necessary
Tidal Volume lower than
V
TE
AVM3-1
The measured V
TE
value is
lower than the set V
TE
min limit
Increase the V
TE
value or raise
the limit V
TE
min
Peak pressure greater
than alarm limit
AVM3-1
The measured Ppeak value is
greater than or equal to the set
Pmax limit
Decrease the Ppeak value or
raise the limit Pmax
Peak pressure below
alarm limit
AVM3-1
The measured Ppeak value is
lower than the set Pmin limit
Increase the Ppeak value or
lower the limit Pmin
Minute Volume below
alarm limit
AVM3-1
The calculated M.Vol value is
lower than the set M.Vol min
limit
Increase the ventilation rate or
the V
TE
value or lower the limit
Pmin
PEEP greater than
PEEP-Setting
AVM3-1
The measured PEEP value is 5
mbar higher than the set PEEP
Decrease the PEEP value or
raise the set PEEP
Check the correct position and
function of the APL valve
FiO2 greater than FiO2
alarm limit
AVM3-1
The measured FiO2 value is
greater than the set FiO2max
limit
Decrease the FiO2 value or
raise the set FiO2max limit
Re-calibrate the O2 sensor
Check Vent Dial position
AVM3-1
The selector switch position is
monitored An invalid position
must be eliminated within two
seconds. After this the alarm
message appears.
The last detected valid position
is maintained until a new valid
position is detected, then the
message disappears
1. Check the correct function of
the Vent Dial
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