(Model K) Page 147
17. Symptom: Pressure sensor drift alarm. Alarm Message: Pressure
Sensor Drift.
Possible Cause
A pressure sensor transducer has failed an internal system check.
Remedy
Re-calibrate the ventilator.
Replace Transducer PCB assembly. (See “A0761 Transducer PCB Assembly” on page
39).
18. Symptom: System fail alarm Alarm Message: System Fail with one
of the following sub messages (Monitor Isolated System fail) or (Monitor
Error Comms) or (Monitor Isol System Fail) or (Unable to calibrate flow
ADC) or (Alarm controller Fail)
Possible Cause
Hardware fault in the monitor subsystem or fault in the monitor/CAN link.
Remedy
Check the CAN card ribbon cable.
Replace the control/monitor board.
19. Symptom: Faulty flow sensor alarm. Alarm Message: Faulty flow
sensor.
Possible Cause
A flow sensor heated wire has broken.
Faulty flow sensor cable.
Loose connection in flow sensor wiring harness.
Defective control/monitor board.
Remedy
Replace flow sensor.
Replace flow sensor cable.
Inspect flow sensor wiring harness.
Replace the control/monitor board.
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