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Manual Reference
ResMed Astral 100 / Astral 150 User Guide, American English, current product-support edition; applicable Astral Clinical Guide; and current regional service documentation. Verify the exact model, product code, software, options, and locally applicable manual revision before service.
Manufacturer Recommendation / AEM Status
For single-patient use, ResMed specifies weekly exterior cleaning, circuit-adapter inspection, and alarm-sounder testing. Monthly, inspect the air filter and check internal-battery capacity by operating on the internal battery for at least 10 minutes, then restore external power. Replace the air filter and single- or double-limb circuit adapter every six months, or earlier when condition requires it.
A two-year preventive maintenance is assigned to a qualified technician. Current regional manuals must control the internal-battery requirement because some editions specify inspection while others specify replacement; the FiO₂ sensor is replaced at the two-year service when fitted. A qualified technician must also complete pneumatic-block preventive maintenance at 35,000 hours. ResMed directs inspection and repair to an authorized service agent and warns against unqualified internal service.
The internal battery must be recharged once every six months during storage. Service reminders, the next-service date, total machine hours, battery status, and configuration should be reviewed at each scheduled PM. Because Astral is a life-support ventilator, do not alter manufacturer intervals through an AEM program unless the organization has completed and approved the required risk assessment and regulatory review.
What This PM Procedure Covers
- Astral 100 and Astral 150 identity, configuration, software, hours, and service status
- Weekly cleaning, circuit-adapter inspection, and alarm-sounder check
- Monthly air-filter inspection and internal-battery capacity check
- Six-month air-filter and circuit-adapter replacement
- External power, internal/external battery, pulse-oximetry, oxygen, circuit, and Learn Circuit checks when configured
- Two-year qualified-technician service and 35,000-hour pneumatic-block PM status
- Configuration-appropriate electrical safety, restoration, and documentation
Required Tools and Equipment
- Current region-appropriate Astral 100 / 150 User Guide and controlled service procedure
- New ResMed-approved air filter and correct single- or double-limb circuit adapter when replacement is due
- Known-good approved patient circuit, bacterial filter, accessories, and test lung appropriate to the configured circuit
- Approved ResMed AC power supply, mains cord, and external battery/DC accessories when configured
- Pulse-oximetry sensor and oxygen components when those options are installed
- Ventilator analyzer and qualified-service tools only when required by the controlled two-year or 35,000-hour service procedure
- Electrical safety analyzer appropriate to the exact power-supply construction and facility standard
- Manufacturer-compatible cleaning materials and facility-required personal protective equipment
Step-by-Step PM Procedure
1. Remove From Patient Use and Provide Backup Ventilation
Action: Transfer the patient to an appropriate backup ventilator under clinical direction before maintenance. Place the Astral in a controlled service area, protect stored patient information, and label it as unavailable.
Expected outcome: No patient depends on the device during testing and continuous backup ventilation is immediately available.
2. Verify Identity and Configuration
Action: Record asset tag, serial and device numbers, Astral 100 or 150, product code, software version, installed circuit adapter, FiO₂ option, pulse-oximetry, external battery, remote alarm, mobility accessories, and power-supply identifiers.
Expected outcome: The equipment matches the CMMS record and the correct model/configuration instructions apply.
3. Review History, Service Date, and Operating Hours
Action: Review alarms, shutdowns, battery-runtime complaints, circuit-learning failures, oxygen/FiO₂ issues, damage, contamination, repairs, recalls/field notices, and prior PM. Open Device Information and record next service due, total machine hours, and available pneumatic-block hours.
Expected outcome: Overdue two-year service, approaching 35,000-hour service, and unresolved reliability concerns are identified.
4. Inspect the Ventilator Exterior
Action: With therapy stopped and power disconnected, inspect the enclosure, touchscreen, power switch, alarm light/bar, speaker openings, alarm-mute/reset control, cooling vents, air inlet, carrying handle, feet, labels, connectors, USB/data areas, and mounting points. Look for impact, cracks, looseness, heat, fluid entry, contamination, blocked vents, or unauthorized modification.
Expected outcome: The device is complete, legible, secure, unobstructed, and free of damage that could affect ventilation or alarm delivery.
5. Inspect Power and Battery Components
Action: Inspect the approved AC supply, mains cord, plugs, DC connector, external battery and cable, internal-battery status, mobility-bag connections, and strain reliefs. Check for exposed conductors, bent pins, looseness, swelling, overheating, contamination, or incompatible components.
Expected outcome: All power sources and connections are correct, undamaged, secure, and recognized by the ventilator.
6. Clean the Device
Action: Turn off and unplug the ventilator. Clean only exterior surfaces using the current ResMed-approved method and agent. Keep liquid from openings and connectors; do not immerse the device, pulse oximeter, or power cord. Allow all components to dry before reconnection.
Expected outcome: The device is visibly clean, dry, and free of cleaning-related damage or fluid intrusion.
7. Inspect and Replace the Air Filter
Action: Inspect the inlet filter monthly for dust, blockage, tears, or damage. At six months—or sooner when dirty—turn off the device, disconnect external power, remove the filter cover, discard the old filter, install a new approved filter, and secure the cover. Do not wash or reuse the filter.
Expected outcome: A clean, dry, correctly fitted filter and secured cover leave the air inlet unobstructed.
8. Inspect and Replace the Circuit Adapter
Action: Identify the fitted single-limb leak, single-limb valve, or double-limb adapter. Inspect for moisture, contamination, damage, membrane/flow-sensor condition, and correct seating. Replace single- or double-limb adapters at least every six months and earlier as condition requires, following the exact adapter instructions.
Expected outcome: The correct clean adapter is securely installed with no moisture, contamination, damage, or overdue replacement.
9. Inspect the Patient Circuit and Accessories
Action: Inspect the complete test circuit, antibacterial filter, tubing, valve, pressure lines, humidifier, oxygen inlet and tubing, pulse-oximetry cable/sensor, remote alarm, and mobility accessories as configured. Confirm intended-use compatibility, secure connections, and required separate maintenance.
Expected outcome: The circuit and accessories are compatible, complete, intact, correctly assembled, and ready for non-patient testing.
10. Verify Startup, Screen, Controls, and Alarm Sounders
Action: Connect approved AC power and start the ventilator. Confirm two startup test beeps; verify the alarm-signal LEDs and alarm-mute/reset light flash, the Patient Home screen appears, the touchscreen and controls respond, date/time are correct, and no unresolved device or service alarm remains.
Expected outcome: Startup completes normally, both audible and visual alarm indications function, and controls/display are fully usable.
11. Verify Internal and External Power
Action: With the internal battery adequately charged, disconnect mains and the external battery so the ventilator runs on its internal battery. Confirm the Battery Use alarm and battery LED, operate for at least 10 minutes for the monthly capacity check, and record the remaining capacity and any abnormal drop. Reconnect the external battery and verify its DC indication/alarm, then restore mains power and charging.
Expected outcome: Each configured power source transfers correctly, indications and alarms are appropriate, and battery behavior supports the expected service without abnormal loss.
12. Perform Learn Circuit
Action: Connect the complete approved test circuit and test lung. Perform Learn Circuit after circuit-adapter or accessory replacement and whenever the configured patient circuit has changed. Follow every on-screen instruction and do not connect a patient during the procedure.
Expected outcome: Learn Circuit completes successfully for the exact circuit configuration with no unresolved leak, resistance, compliance, or adapter error.
13. Verify Configured Monitoring and Oxygen Connections
Action: When pulse oximetry is configured, attach the approved sensor/test method and confirm SpO₂ and pulse values display. When oxygen is configured, inspect hoses/connections for damage or leakage and verify the correct setup. For Astral 150 with FiO₂ monitoring, confirm the sensor status and two-year replacement record under the controlled service procedure.
Expected outcome: Each installed monitoring/oxygen option is recognized, stable, and free of connection or service errors, or is documented N/A.
14. Verify Two-Year and 35,000-Hour Service Requirements
Action: If the two-year service is due, have a qualified/authorized technician complete the current ResMed preventive-maintenance tests and the regional manual's required internal-battery and FiO₂-sensor actions. If pneumatic-block hours have reached 35,000, arrange the specified pneumatic-block PM. Do not substitute this external procedure for controlled service documentation.
Expected outcome: Required qualified service is current and traceable; overdue internal service prevents return to clinical use.
15. Perform Configuration-Appropriate Electrical Safety
Action: Inspect and test the exact AC supply, mains cord, and ventilator configuration under the facility's adopted standard and the controlled service procedure. Record equipment class, protective-earth applicability, leakage/touch-current measurements where required, limits, readings, and result. Do not invent a ResMed limit or apply a test unsupported by the supply construction.
Expected outcome: Applicable tests meet the verified manufacturer/facility criteria and nonapplicable measurements are documented N/A.
16. Restore and Document
Action: Remove test data where permitted, restore approved configuration and alarm settings, connect charged power sources, secure accessories and ventilation paths, and repeat startup/readiness checks. Document filter/adapter dates, battery results, alarm check, Learn Circuit, options, hours, service due dates, electrical results, corrective work, and disposition.
Expected outcome: The Astral is clean, correctly assembled, fully charged, current on required service, and either returned to clinical use with complete records or clearly removed from service.
Electrical Safety Testing
Astral uses an external AC power supply and can also operate from internal/external batteries. Verify the exact labeled power-supply construction before selecting tests. Perform only the inspection and protective-earth or leakage/touch-current measurements applicable under the facility's adopted electrical-safety standard and current ResMed service procedure. Record actual limits and readings; document protective earth N/A when the verified configuration has no accessible protective-earth path. Electrical safety does not replace alarm, battery-transfer, circuit, or scheduled authorized-service requirements.
Pass / Fail Criteria
Pass
- Identity, configuration, software, service dates, machine hours, enclosure, power components, connectors, labels, and accessories pass inspection
- Air filter and circuit adapter are clean, correct, undamaged, and replaced at the required six-month interval
- Startup beeps, alarm LEDs, alarm-mute/reset light, display, touchscreen, controls, and date/time pass
- Internal battery operates for the monthly 10-minute check without abnormal loss; external battery and mains transfer/charging pass when configured
- Learn Circuit completes successfully with the exact test circuit
- Pulse-oximetry, oxygen, and FiO₂ functions pass when configured or are documented N/A
- Two-year qualified service and 35,000-hour pneumatic-block PM are current
- Electrical safety, restoration, and documentation are complete
Remove From Service
- Physical, fluid, heat, connector, power-supply, battery, inlet, fan/vent, or circuit-adapter damage could affect safe ventilation
- Startup alarm sounds/lights fail, a control/display fault exists, or any unresolved technical/service alarm remains
- Internal/external battery transfer, charging, or capacity is unreliable
- Learn Circuit fails or the configured circuit/accessory is incompatible, leaking, obstructed, contaminated, or damaged
- Required monitoring, oxygen, FiO₂, or electrical-safety verification fails
- Two-year service, required regional battery/FiO₂ action, or 35,000-hour pneumatic-block PM is overdue
- Authorized inspection/repair is required or complete backup ventilation cannot be assured
Copy/Paste CMMS Work Order Procedure
Astral is a life-support ventilator. Never perform maintenance while it is supporting a patient, and do not return it to use with an unresolved alarm, failed check, overdue authorized service, or unavailable backup ventilation.