Diagnostic codes
6-2
10070389 Rev. A
Puritan Bennett™ 700 Series Ventilator System Service Manual
6.2 About software errors
Many of the codes in this chapter represent “software errors.” The software continually
makes checks to ensure data is reasonable and makes other data checks. If any of these
checks fails, a software error is logged and the ventilator is reset, which causes POST to run. If
POST does not pass, the ventilator issues up to two more system resets, waiting for POST to
pass. If POST is still not passed, the ventilator declares a VENT INOP condition. As a result, the
patient can breathe through the opened safety valve. Similarly, if three or more software
errors are detected within 24 operating hours, the ventilator declares a VENT INOP condition.
Often, a software error is a transient failure, which is not expected to recur. When the system
is reset, POST passes, and ventilation continues. If a software error recurs or if multiple
software errors occur, the problem requires corrective action. Contact your regional Covidien
Technical Support.
6.3 About ventilator status (13000 series) codes
Codes in the 13000 series (ventilator status codes) provide information on:
• What the ventilator was doing at the time a ventilator reset occurred
• The overall pass/fail status SST and EST
Because a ventilator reset can be triggered by detection of an unexpected condition, a post-
reset status code is often, but not always, accompanied by a code representing that
triggering condition. If another code was recorded in the test log immediately before the
reset code was recorded, troubleshoot the ventilator from that accompanying code. If an
accompanying code was not recorded, particularly if the reset recurs, the problem requires
corrective action. Contact your regional Covidien Technical Support.
The SST and EST pass/fail status codes are for information only and do not in themselves
require corrective action.
6.4 List of codes
Refer to Table 6-1 to interpret the codes in the alert and test logs. These procedures are
sequenced to correct the most probable malfunction or to present the most efficient
corrective action first. The proposed fixes listed, however, may not always correct the
particular problem.
NOTE:
• Use the service menu
Sensor data
function to help confirm the failure of suspect
components.
• If the listed actions do not correct an electronic problem, try replacing the controller
PCB. Although replacing the controller PCB may not be listed as a corrective action,
many of the ventilator’s electronic circuits ultimately are controlled by that PCB.
6.4.1 Error code 1101
The following discussion clarifies how the 700 Series Ventilator generates a 1101 error.
As part of the 700 Series Performance Verification Test (PVT), the Safety Valve portion of the
test verifies the Safety Valve opens should the exhalation valve fail. It blocks both the patient
wye and the exhalation valve port and verifies the Safety Valve opens during inspiration. In
740 software, through Revision C, the Safety Valve remains open, suspending ventilation
until the ALARM reset key is pressed.
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