GoodKnight 420 Evolution

Medtronic · Ventilators

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Puritan Bennett GoodKnight 420 Evolution Patient Manual

Operator's ManualArchive copyEN
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Stuck? Start here

✅ Check the simple stuff first
  1. Make sure the patient is safe — swap in a backup unit if you need to.
  2. Reproduce the complaint yourself and write down exactly what you see (screen, alarm, code).
  3. Check power, battery, cables, accessories, and settings before ordering parts.
  4. Then open the service manual above and follow its troubleshooting section.
🧰 Common checks for Ventilators (3)

Any technical fault source ↗

  • Ventilate patient by other means first, note code, send for service

Disconnection/leak/loss of PEEP source ↗

  • Check circuit, ET tube and expiratory valve

Flow sensor alarms source ↗

  • Remove water, recalibrate, replace sensor
📞 Still stuck? Call Medtronic

Contact Medtronic US

📞 Tech support
1-800-255-6774
🛠️ Service
1-800-962-9888, option 2
✉️ Email
[email protected]
🕘 Hours
Ventilation: M-F 8am-6pm CT; AC&M (Nellcor/BIS/Capnostream): M-F 6:30am-4:30pm MT

Ventilators: 800-255-6774 opt 4 (tech support/service scheduling), opt 3 (service agreements). Nellcor/BIS/INVOS/Capnostream: opt 1 then opt 2 ([email protected]). Service phone = US customer service.

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