Covidien Puritan Bennett 700 Series, Service Manual

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Self-tests
3-12 10070389 Rev. A Puritan Bennett™ 700 Series Ventilator System Service Manual
EST fault One or more tests did not pass.
These tests might not compromise
the ventilator’s ability to ventilate
safely, based on the operator’s
evaluation of the situation. To retest from the start of the test sequence , press the alarm
reset key.
To exit EST and resume ventilation , press MANUAL INSP. You
are asked whether you want to use the override feature.
Press MANUAL INSP again to complete the override. Unblock
the wye as directed, then press ACCEPT. POST now runs, and
ventilation resumes at last valid settings.
Warning
Do not use a ventilator that has completed EST with a fault status without verifying its
operational integrity by means other than EST and determining the patient will not be placed
at risk.
EST failed One or more tests failed that might
compromise the ventilator’s ability
to ventilate safely. A VENT INOP
condition is declared when you cycle
power to the ventilator. Repair and retest the ventilator.
To retest from the start of the test sequence , press the alarm
reset key.
Table 3-7: EST completion status (continued)
Table 3-8: EST tests
No. Test Purpose Status In SST? Comments
1
DAC-ADC loop
test A loopback test to
check D/A and A/D
converters’ operation Failure if not
passed No
2
Safety valve test Verifies safety valve
relieves excess circuit
pressure Failure if not
passed Yes
3
Motor sensor
test Checks operation of
rotary encoder Failure if not
passed No
NOTE:
To ensure compliance compensation functions correctly,
the user must run EST or SST with the circuit configured
as intended for use on the patient.
4
Zeroing of P
O
Zeroes oxygen
regulator pressure
transducer Fault if not
passed No Disconnect and reconnect
oxygen supply, as directed. Press
ACCEPT to signify you have
performed each requested
action.
NOTE:
Overriding this fault could result in inaccurate oxygen percentage delivery.