1. Two flowmeter oxygen concentrators show low oxygen flow:

　　The two flowmeter oxygen concentrators are running normally after the two flowmeter oxygen concentrators are turned on, but the flowmeter shows low oxygen flow. There are three reasons for this phenomenon.

　　The first possibility is that the flow meter is off or the value is too low, and the flow button can be turned up. The second possibility is that the oxygen tube is twisted or blocked and can be removed from the oxygen tube. The third possibility is that the connecting pipe inside the machine is removed or damaged. At this time, stop the machine immediately and contact the official after-sales maintenance personnel of Jumao for inspection.

　　2. The oxygen outlet of the two flowmeter oxygen concentrators cannot detect oxygen:

　　After power on, the water tank is bubbling, and no oxygen can be detected at the oxygen outlet. This may be because the wet box rubber plug is not blocked, the humidification box has been removed, and the rubber plug is blocked. You can check the problem by yourself. If you can't solve it, contact the after-sales maintenance personnel of the two flowmeter oxygen concentrator suppliers to check.

　　3. The oxygen output of the oxygen concentrator is small:

　　It is easy to have this problem after using it for a long time. Don't panic when this problem occurs, usually, the pipes in the humidification cup are clogged with limescale. Remove the humidification cup and remove the gas line for cleaning. The two flowmeter oxygen concentrator suppliers recommend that if this operation does not solve the problem, contact the after-sales service personnel to check.