Problem / possible cause | Solution |
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The delivered airflow is not humid/heated although the H4i humidifier is in use
The humidifier is not properly attached. | Correctly attach the humidifier. |
The humidifier does not heat. | The device is currently powered by |
| battery use or not connected to the |
| mains. |
The humidifier does not work.
Return the device and the humidifier for servicing.
The water chamber is empty. | Fill the water chamber of the humidifier. |
USB stick is not readable or writeable | |
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The USB stick contains unreadable data, | Consult your clinician. |
does not have enough space available, is |
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not compatible with the device. |
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USB stick is defective. | Replace the USB stick after consulting |
| your clinician. |
FiO2 sensor calibration failure
FiO2 sensor is not attached properly.
For the correct attachment of the FiO2 sensor, see “Using the FiO2 monitoring sensor” on page 8.
FiO2 sensor is used or defective.
If the lifetime of the FiO2 sensor has exceeded one year please replace the FiO2 sensor and start calibration again.
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| LCD: | is displayed in the header | ||
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| Battery is not charging. | • Ensure the ambient temperature | ||
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| conditions are within the specified | |
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| operating range. If the problem persists | |
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| within the specified operating conditions | |
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| please return the device for servicing. | |
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| device again. | |
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Technical specifications | |||||
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| Operating pressure | • IPAP: 2 cm H2O to 40 cm H2O (in S, ST, T, PAC mode) | ||
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| range |
| • PS: 0 cm H2O to 38 cm H2O (in S, ST, T, PAC mode) | |
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| • EPAP: 2 cm H2O to 25 cm H2O (in S, ST, T, iVAPS, PAC | |
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| mode) | |
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| • CPAP: 4 cm H2O to 20 cm H2O (in CPAP mode only) | |
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| • Min PS: 0 cm H2O to 20 cm H2O (in iVAPS mode) | |
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| • Max PS: 0 cm H2O to 30 cm H2O (in iVAPS mode) | |
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| Note: iVAPS mode is only available in Stellar 150. | |
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| Maximum single fault | 60 cm H2O (in all modes) | ||
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| pressure |
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| Breathing resistance | 2 cm H2O at 30 L/min; | ||
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| under single fault | 7.2 cm H2O at 60 L/min | ||
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| Maximum flow | > 200 L/min at 20 cm H2O |
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| Flow accuracy | ± 6 L/min or 20% measured value, whichever is greater |
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| Test condition: T mode, IPAP: 40 cm H2O, EPAP: | |
2 cm H2O, Rise Time: MIN, Fall Time: MIN, Ti: 4.0 sec,
Respiratory Rate: 10 bpm, with ResMed calibration cap.
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