Covidien Puritan Bennett 700 Series, Service Manual

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Diagnostic codes
6-8 10070389 Rev. A Puritan Bennett™ 700 Series Ventilator System Service Manual
6023 BIOT (technical alert --
LOW INSP PRESSURE) Exhalation pressure transducer
reading (P
e
) fell below
-40 cmH
2
O, possibly due to a
patient outdrawing the
ventilator’s set flow rate
1. Make sure PEAK FLOW setting is
adequate to meet patient’s demand.
Consider appropriate LOW INSP
PRESSURE and ventilator settings.
2. Check for ventilator breathing circuit
disconnect.
3. Make sure air intake filter is not
occluded.
4. Check reasonableness of P
e
reading
using Sensor data function while
ventilation is occurring. Perform a
P
e
/P
cyl
gain equalization as required.
5. Replace pressure solenoid PCB.
6024 BIOT (technical alert --
LOW INSP PRESSURE) Inspiration pressure transducer
reading (P
i
) fell below
-40 cmH
2
O, possibly due to a
patient outdrawing the
ventilator’s set flow rate
1. Make sure PEAK FLOW setting is
adequate to meet patient’s demand.
Consider appropriate LOW INSP
PRESSURE and ventilator settings.
2. Check for ventilator breathing circuit
disconnect.
3. Make sure air intake filter is not
occluded.
4. Check reasonableness of P
i
and P
a
readings using Sensor data function
while ventilation is occurring. Perform
a P
e
/P
cyl
gain equalization as required.
Replace pressure solenoid PCB.
6025 BIOT (technical alert --
LOW INSP PRESSURE) Cylinder pressure transducer
reading (P
cyl
) fell below
-40 cmH
2
O, possibly due to a
patient outdrawing the
ventilator’s set flow rate
1. Make sure PEAK FLOW setting is
adequate to meet patient’s demand.
Consider appropriate LOW INSP
PRESSURE and ventilator settings.
2. Check for ventilator breathing circuit
disconnect.
3. Make sure air intake filter is not
occluded.
4. Check reasonableness of P
cyl
reading
using Sensor data function while
ventilation is occurring. Perform a P
e
/
cyl
gain equalization as required.
5. Replace pressure solenoid PCB.
6026 BIOT (technical alert --
CONTACT SERVICE) Flow sensor offset has changed
by an unexpectedly large value 1. Verify tubes between flow sensor and
pressure transducer are securely
connected.
2. Make sure EXHAUST port is not
blocked.
3. Check flow sensor calibration
constants.
4. Replace flow sensor.
5. Replace pressure solenoid PCB.
6027 BIOT (technical alert --
CONTACT SERVICE) Safety valve should be closed,
but measured current is too
low 1. Check that safety valve/ventilator head
harness connection is secure.
2. Check safety valve resistance (10.5 to
14
Ω
).
3. Replace safety valve.
4. Replace pressure solenoid PCB.
Table 6-1: Diagnostic codes (continued)
Code Software Possible cause Corrective action