8400

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.

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