Chapter 8
Performance Verification
REF 580-1000-02 G
Esprit® Ventilator Service Manual © Respironics, Inc.
8-45
Test 8: Alarm Output Signal, Volume, and Remote Alarm
Test 9: Gas Volume Accuracy
Test 10: Oxygen Accuracy
Symptom
Recommended Repair
Normally open or
normally closed relay
test failure (continuity
check)
1. Verify continuity of remote alarm test cable.
2. Replace main PCB.
Primary alarm volume
not adjustable
1. Verify that alarm volume potentiometer is connected to J5
connector on MMI PCB
2. Slave in another alarm volume potentiometer.
3. Replace MMI PCB.
Analog output port
alarm voltage outside
acceptable range
1. Replace digital PCB.
2. Replace main PCB.
Symptom
Recommended Repair
Measured tidal volume
out of tolerance
1. Verify that altitude is correct.
2. Verify that compliance factor is disabled.
3. Verify that calibration analyzer is set to measure the correct gas
flow (air or oxygen, depending on which test failed) flow sensor.
4. Replace source gas (air or oxygen, depending on which test
failed).
5. Replace source gas motor controller (air or oxygen, depending on
which test failed).
6. Replaced source gas valve (air or oxygen, depending on which test
failed).
7. Replace sensor PCB.
8. Replace analog PCB.
Symptom
Recommended Repair
The % O
2
in the
Patient
Data
screen is out of
tolerance
1. Check that test oxygen monitor is calibrated.
2. Run EST to calibrate the oxygen sensor and verify that the
calibration test passes.
3. Verify that the oxygen sensor coupling is directly connected to the
main outlet of the ventilator.
4. Verify that the oxygen sensor is oriented with cable connector on
top.
5. Verify that the oxygen sensor is positioned in its rectangular recess
in the bottom enclosure.
6. Replace the oxygen sensor harness and run EST to recalibrate the
sensor.
7. Replace the sensor PCB and run EST to recalibrate the sensor.
