Performance verification
Puritan Bennett™ 700 Series Ventilator System Service Manual
10070389 Rev. A
5-17
5.7 Troubleshooting
NOTE:
Use the service menu
Sensor data
function (described in Section 4.2.1) to help confirm
the failure of suspect components.
Use this troubleshooting information in conjunction with the performance verification tests.
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.
Do not overlook problems found after this inspection, and perform the necessary repairs. The
results of future tests could be affected.
NOTE:
This troubleshooting information assumes EST has passed. Use Chapter 3 to diagnose
EST failures.
1.
Ground line resistance (including power cord) >0.2 Ω
a.
Disconnect ventilator from electrical safety analyzer.
b.
Verify correct power cord (with grounding plug) is being used and that there is no
visible damage to power cord. Check continuity of power cord. Replace power cord,
as required.
c.
Verify ground wire from line filter to power tray is secure.
d.
Replace power cord.
e.
Replace line filter.
2.
POST failed
3.
Leakage current >300 μA (100/115 V units) or >500 μA (220/240 V units)
a.
Disconnect ventilator from electrical safety analyzer.
b.
Verify correct power cord and line filter are being used and that there is no visible
damage to power cord. Verify power cord has no shorts. Replace power cord, if
indicated.
c.
Verify secure harness connections of power input components (line filter, circuit
breaker, power switch, and power supply terminal block).
d.
Replace power cord.
e.
Replace power input components as necessary.
4.
Main fan not operating properly
a.
Verify correct voltage to fan (+23 to +25 V when ventilator is powered by AC). If
inadequate or no voltage, troubleshoot from fan back toward power input
components.
b.
Verify main fan/ventilator head harness connection is secure.
c.
Replace main fan.
d.
Replace pressure solenoid PCB.
Summary of Contents for Puritan Bennett 700 Series
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