IX. MAINTENANCE AND SERVICE- cont.
67
6767
67
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
Oxygen will not calibrate.
Aged sensor.
Bad IC602, L301 (no +5V analog)
Bad cable.
Replace sensor.
Replace IC602, L301.
Replace cable.
Pressure will not calibrate.
Tubing leak.
TD-AIRWAY bad.
Replace tubing.
Replace TD-AIRWAY.
Pressure unable to reach 120
cmH
2
O during operation.
Loosing pressure through
Pressure Relief Valve.
DARV leaking at seat or signal
pressure.
Clean, re-cal or replace Relief
Valve.
Clean seat, repair leak, re-cal or
replace.
Flow will not cal.
(See following symptom also)
Bad connection at JPOT
Defective flow encoder.
Bad IC603.
Defective atmospheric
compensation circuit.
Reconnect
Replace 10K pot.
Replace IC603.
Check TD-ATMOS.
Flow will not reach 120 LPM
or displayed flow does not
agree with actual flow.
Supply pressure too low.
Max Pressure not on or defective.
Flow restriction or leak.
Input filter clogged.
Regulator set too low.
Flow valve defective.
Check supply pressure at
ventilator input fitting while
gas is flowing. Should meet
specification on side of case.
Turn Max Pressure fully on or
repair.
Check for restrictions and leaks
in flow path.
Replace filter and resolve cause
Calibrate regulator pressure.
Check flow valve.
VENTILATOR FAILURE
flashes on display
Refer to Appendix E Replace solenoid.
Replace solenoid wire.
Power off/on. If persists, then
return to factory for service.
Pneumotach reading greatly
inaccurate
Leak in breathing circuit
Bad transducer (TD-PNEUMO)
Check all circuit connections
Replace transducer and/or
check associated circuitry
Unit hangs with Bio-Med
Devices on the display
Microprocessor failure Return to factory
Continuous Audible Tone
Devices controlling the alarm
beeper have failed.
Return to factory
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