Invacare Platinum IRC5LXO2AW Service Manual page 18

SECTION 2—INSTALLATION/SEQUENCE OF OPERATION
If the oxygen level is not above 85% ± 2% after the first five minutes, the system will
continue to monitor the O and wait for a maximum of 30 minutes from start-up to reach
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85% ± 2% before activating an alarm. Environmental factors such as low voltage, high
altitude, or age of the machine will affect the time required to reach 85% ± 2%.
If the oxygen level is not above 85% ± 2% within the first 30 minutes, the oxygen
concentration alarm sequence will activate and the unit will shut down.
When oxygen concentration is above 85% ± 2%, the sensor measures oxygen purity every
10 minutes. If a reading falls below 85% ± 2%, a YELLOW light will illuminate. If the
oxygen purity falls below 73% ± 3%, the RED light/Alarm/Shut-Down mode will activate.
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Platinum Oxygen Part No 1118396