┌────────────────┬──────────────────┬───────────────────────────┐
│ Problem
│ Potential Cause │ Corrective Action
│
╞════════════════╪══════════════════╪═══════════════════════════╡
│
│ Large leak in
│ Eliminate leak.
│
│
│ source pressure │
│
│
│ monitoring
│
│
│
│ circuit.
│
│
│
├──────────────────┼───────────────────────────┤
│
│ Inspiratory time │ Disassemble and examine
│
│
│ and/or expiratory│ valve; repair or replace │
│
│ time controls
│ as necessary.
│
│
│ have been forced │
│
│
│ open past
│
│
│
│ internal stops. │
│
└────────────────┴──────────────────┴───────────────────────────┘
Table 2-16. Troubleshooting at start up in either mode (concluded).
┌────────────────┬──────────────────┬───────────────────────────┐
│ Problem
│ Potential Cause │ Corrective Action
│
╞════════════════╪══════════════════╪═══════════════════════════╡
│ Increasing flow│ Source gas not
│ Turn source gas on.
│
│ does not cause │ turned on.
│
│
│ flow gauge to │
│
│
│ change from
│
OR
│
│
│ zero.
│ Pressure-balance │ Install spring and check │
│
│ spring omitted
│ regulator function.
│
│
│ from regulator
│
│
│
│ assembly.
│
│
│
│
OR
│
│
│
│ Regulator valve │ Replace diaphragm and
│
│
│ is leaking; flow │ check regulator function. │
│
│ vents to
│
│
│
│ atmosphere.
│
│
├────────────────┼──────────────────┼───────────────────────────┤
│ Increasing flow│ Gauge is faulty. │ Repair or replace gauge. │
│ control does
│
OR
│
│
│ not cause flow │ Leak in
│ Check nebulization control│
│ gauge to
│ nebulization
│ circuit for leaks and
│
│ increase in
│ control.
│ eliminate them.
│
│
OR
│
│
│ may be unable │
│
│
│ to rise above │ Leak in bypass
│ Check bypass valve
│
│ 20 - 25 lpm.
│ valve.
│ condition and calibrate. │
└────────────────┴──────────────────┴───────────────────────────┘
Table 2-17. Troubleshooting in either mode of operation (continued).
MD0355
2-34