Flow meter on my Invacare Perfecto2 oxygen concentrator not working. The knob turns but the ball doesn't move.

You should call the manufacturer for this type answer you need.

It is not producing the correct percentage of oxygen. It will need to go back to Invacare for repair. Sorry.

There are parts inside that machine that have fixed hour ratings. When they are needing to be replaced, that machine has to be serviced. Since it is not an over the counter device, you need to contact a medical specialty vendor and have it worked on. There is no parts available.

Hello there, various reasons abound to cause this problem. The first is unit overheating due to blocked air intake. To solve this remove and clean cabinet filters. Move oxygen concentrator at least three inches away from walls, draperies or furniture.
Secondly insufficient power at outlet. DO NOT use extension cords. Move to another electrical outlet or circuit.
Thirdly is low oxygen purity. Clean or Replace filters.
Fourth, kinked or blocked tubing,cannula or humidifier.Inspect for kinks or blockages. Correct, clean or replace item. Once corrected, turn power OFF for 60 seconds and then turn power back ON.
Fifth, flowmeter set too low:0.5 L/min (or less) for Platinum 5; 1.0 L/min (or less) for Platinum 10. Check flowmeter is set to 1.0 L/min. or more.
I after all these the problem persists then Internal repairs are required on the unit and you need to call a service provider.To do this call Technical Services on 800-832-4707 toll free.
Hope this support has been helpful?
Thank you for visiting FixYa.

When these units are beeping it indicates they are basically not running. So you first need to ensure who ever is using it has access to o2 if they require. There isn't much you can do to fix these at home. You can first try going over the following. Not really that helpful but might help you sort it out. If you can't spot anything obvious ie unplugged no power etc then first contact anyone local such as the medical supply place. That would get you the fastest repair or help. If you don't have one of those to call then don't be afraid to call the 1-800 number below and ask the company.
The local company or even your doctor might be able to help you get bottled O2 while your unit is getting fixed.

If there is an audible alarm -- concentrator is not running: • Is unit plugged into a working outlet? • Check circuit breaker -- Right side of unit, behind a small door on the Companion 590 and 429a -- Back of the unit on the Companion 492 -- Between the on/off switch and flow meter
If there is an audible alarm -- concentrator is running: • Concentrator cannot be fixed by consumer • Call 314.362.0720 or toll-free 800.456.9366
There is a visual alarm on the Companion 590 with oxygen concentration indicator: • Green Light -- Normal -- Oxygen concentrations are correct • Yellow Light -- Below Normal -- Oxygen concentrations have fallen below an acceptable level • Red Light -- Not Operating -- Oxygen is no longer being produced; audible alarm will sound and concentrator will shut down

That is not normal operation. You need to contact a service or support rep from Fujitsu or contact the company you purchased the unit from.

These should produce oxygen within a few seconds of being turned on and be up to full flow in well under a minute.That is going to vary by model but 15 minutes is too long.

mcdevito75 here, You can try online at Invacare.com You can also check with any surgical supply outlet in your area.

Make sure flow rate is greater than 1LPM and no more than 5LPM. May need filters changed or possibly new sieve beds.

You are correct. This concentrator is oxygen specific. Therefore it only concentrates the oxygen, not other gasses. Joe

ps please rate my answer as very helpful.. thanks