Diagnostic codes
6-28
10070389 Rev. A
Puritan Bennett™ 700 Series Ventilator System Service Manual
9075
Ongoing hardware
checks
Piston not retracting as
expected
1. If piston/cylinder was recently replaced,
make sure calibration constants were
correctly input.
2. Replace motor/encoder.
3. Replace controller PCB.
4. Replace BBU PCB.
5. Replace BBU PCB/ventilator head
harness.
6. Check mesh of pinion gear with rack.
Remesh as necessary.
7. Replace optoswitches.
9076
Ongoing hardware
checks
Safety valve failed to close
1. Replace safety valve.
2. Replace pressure solenoid PCB.
9077
Ongoing hardware
checks
Safety valve failed to open
1. Replace safety valve.
2. Replace pressure solenoid PCB.
9078
Ongoing hardware
checks
Not Ventilating signal used in
UI/BD communications is not in
expected state.
1. See Section 6.2.
2. Replace controller PCB.
9079
Ongoing hardware
checks
Not Ventilating signal used in
UI/BD communications is not in
expected state.
1. See Section 6.2.
2. Replace controller PCB.
9080
Ongoing hardware
checks
Not Ventilating signal used in
UI/BD communications is not in
expected state.
1. See Section 6.2.
2. Replace controller PCB.
9081
Ongoing hardware
checks
A high inspiration pressure
condition was not stopped by
software.
1. Make sure EXHAUST port is not
blocked.
2. Use
Sensor data
function to check P
i
reading.
3. Replace pressure solenoid PCB.
4. Replace controller PCB.
5. Replace BBU PCB.
6. Make sure safety valve can open.
Replace as required.
9082
Ongoing hardware
checks
Cylinder pressure out of
bounds
1. Use
Sensor data
function to check P
cyl
reading.
2. Replace pressure solenoid PCB.
9083
Ongoing hardware
checks
Piston velocity out of bounds
1. Replace motor/encoder.
2. Replace pressure solenoid PCB.
3. Replace controller PCB.
9084
Ongoing hardware
checks
Failure to autozero exhalation
pressure transducer
1. Use
Sensor data
function to check P
e
reading.
2. Check that autozero solenoid/main
ventilator head harness connection is
secure.
3. Replace pressure solenoid PCB.
Table 6-1: Diagnostic codes (continued)
Code
Software
Possible cause
Corrective action
Summary of Contents for Puritan Bennett 700 Series
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