SV300

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.

System Check fails (Fail. Ventilation Disabled / High Leakage) source ↗

• Disconnect the patient; connect gas; block the Y-piece with the leak test plug
• Review Details: blower, O2/insp/exp flow sensors, pressure sensors, exp valve, safety valve, leak, compliance, O2 sensor
• High Leakage means exp flow, pressure, exp valve or safety valve failed: check circuit seals and exp valve

PEEP Too Low / Airway Leak? source ↗

• Check tubing and connections for leaks
• Run System Check to quantify leak

Airway Obstructed? / Sustained Airway Pressure source ↗

• Check and clean tubing and the expiration valve
• Check the patient and settings

Inaccurate volumes source ↗

• Run Flow Sensor Calibration before first use or when values deviate

CO2 sampling abnormal (sidestream) source ↗

• Check for a kinked sampling line
• Remove the line from the water trap: if 'airway malfunction' shows, replace the water trap; otherwise replace the sampling line
• Manual zero: Setup → Maintain → User → password → CO2 In Maintenance → Zero; calibrate yearly

Battery / power alarms source ↗

• Connect external power; Battery 1/2 Failure 01–05 or Battery Undetected → service

Device Failure / Technical Error codes source ↗

• Note the number; restart if the manual allows (DF 20); otherwise remove from use and call service

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