┌────────────────┬──────────────────┬───────────────────────────┐
│ Problem
│ Potential Cause │ Corrective Action
│
╞════════════════╪══════════════════╪═══════════════════════════╡
│ Low pressure
│ Leak in low
│ 1. Apply a liquid leak
│
│ alarm is
│ pressure alarm
│ detector to both ends of │
│ activated at a │ tubing system.
│ tubing connections color │
│ pressure other │
│ coded red. Correct any
│
│ than 43psig.
│
│ bubbling connections.
│
│
│
OR
│
│
│
├──────────────────┼───────────────────────────┤
│
│ Internal
│ 2. Remove cartridge from │
│
│ malfunction of
│ ventilator so it can be
│
│
│ taken apart. Replace any │
│
│ alarm cartridge │ worn component parts.
│
│
│ (P/N 4250D).
│
OR
│
│
│
│
│
│ alarm cartridge.
│
├────────────────┼──────────────────┼───────────────────────────┤
│ Audible alarm │ Alarm assembly
│ 3. Ensure the alarm is
│
│ not activated │ not secured to
│ securely attached to the │
│ when a low-
│ bottom of
│ ventilator.
│
│ pressure
│ ventilator.
│
│
│ situation
│
│
│
│ occurs.
│
OR
│
│
│
├──────────────────┼───────────────────────────┤
│
│ Faulty reed (P/N │ 4. Replace reed.
│
│
│ 1866) in alarm. │
│
│
│
│
OR
│
│
│
│
│
│
│
│ 5. Replace with new alarm │
│
│
│
(P/N 5127).
│
└────────────────┴──────────────────┴───────────────────────────┘
Table 2-15. Low pressure alarm system troubleshooting.
d. Calibration Test. If the following parameters are not met, refer back to
paragraph 2-2 to obtain correct values. Ensure a static 50psig driving pressure to the
ventilator.
(1)
Source pressure gauge.
(a) Rotate the mode selector to SPONTANEOUS BREATHING ON and
adjust the flow to zero.
(b) Check for an operating pressure of 45 to 55psig as indicated by the
green wedge.
(2) Airway manometer. Tap the gauge (to shock the needle). Check the
needle to ensure it is indicating zero.
MD0355
2-28