Getinge Maquet SERVO-i - Page 61

Servo-i Ventilator System Troubleshooting
Revision 02 Service Manual 6 - 9
6
Test Test description * Recommended action if the test fails
Flow transducer test
Checks the inspiratory flow transducer.
Calibrates and checks the expiratory
flow transducer.
Calibrates at 60% O
2
and checks at
100% and 21% O
2
. As different gas
mixtures are used during this test,
calibration of the expiratory flow
transducer will only be performed if
both gases are connected. The check
using the connected gas, (100% alt.
21% O
2
) will however be performed.
The ‘Flow transducer test’ will pass if
the result of this check corresponds to
the old calibration factor from a
previous Pre-use check. The same
expiratory cassette must be used.
The new calibration factor for the
expiratory flow transducer may not
differ more than -10% to +15% from
factory calibration.
During this test, the different
subsystems concerned are compared.
The difference between the
subsystems must not be more than
±0.3 l/min.
(BRE + MON)
1. Check that the connected gas
supply pressure (Air and O
2
) is
within the specified range.
2. Check the expiratory cassette:
• Check that the cassette is
correctly seated in the cassette
compartment.
• If possible, replace the
expiratory cassette and check if
the new cassette is accepted by
the Pre-use check.
• If the new cassette was
accepted by the Pre-use check,
the fault was located to the
cassette.
The fail with the old cassette
may in this case be due to water
collected at the pressure
transducer filter inside the
cassette. Dry the old cassette
properly.
3. Replace the gas modules. Replace
one gas module at a time.
4. Replace PC 1785 Expiratory
channel connector.
5. Replace PC 1771 Control.
6. Replace PC 1772 Monitoring.
7. Replace PC 1784 Expiratory
channel.
Battery switch test Checks that the power supply switches
to battery when mains power is
disconnected.
Checks that the power supply switches
back to mains power when re-
connected.
This test will not be performed if:
• Less than 10 min. backup time
remains in the connected Battery
module(s).
• No Battery module is connected.
(MON)
1. Check that the total remaining time
for the Battery module(s) is >10
min. If not, allow the battery to
charge and repeat the test.
2. Replace PC1775 Plug-and-play
back-plane.
3. Replace the Battery module(s).