1. Machine Unable to Operate
Symptom: The oxygen concentrator cannot be turned on. The power light is off when the power switch is turned on.
NO.1: Power cord is not properly plugged into the wall outlet.
Solution: Correctly connect the power plug into the wall socket. Ensure they are of the same voltage.
NO.2: Main switch is not turned on.Solution: Turn on the main switch.
NO.3: Overload protector has popped out.Solution: Press the overload protector back in place.
No.4: Internal cables are disconnected.Solution: Open the cover and connect the cables properly.
NO.5: The fuse on the PCB board is blown.Solution: Replace the blown fuse.
2. Oxygen Concentrator Stopped Working After 1-2 Hours
NO.1: Unit restarts automatically after 2-3 minutes.Solution: Use a 3000VA voltage stabilizer and ensure the cooling system is working properly.
NO.2: Unit restarts automatically after 20-30 minutes.Solution: Check if the fan or radiator is damaged and replace them if necessary.
3. Oxygen Concentrator Overheating
Symptom: The machine produces heat.Solution: If no alarms are activated, this is normal. Place the machine in a well-ventilated area.
4. Flowmeter Issues
NO.1: Flowmeter is not working.
Step 1: Check if the air compressor is functioning.Open the HEPA filter casing and check for airflow.Ensure the compressor cable is properly connected to the "COMP" slot on the PCB board.Step 2: Check if the flowmeter is stuck or its screw has slipped.Shake the flowmeter and try adjusting it. Replace if necessary.Rotate the flowmeter screw counterclockwise to reset it.
Step 3: Flowmeter only adjusts between 2-5L/min.Solution:1)Clean the humidifier bottle and ensure it’s properly tightened.2)Check for leaks in the tubing and valves.
5. Water in Nasal Cannula
- Step 1: Ensure tubing is correctly connected to the humidifier bottle.
- Step 2: Check if there is excessive water in the humidifier bottle and adjust the level.
- Step 3: Remove the humidifier bottle and connect the nasal cannula directly to blow out the water.
6. Humidifier Bottle Alarm
Solution: Adjust the nasal cannula if it is bent or inserted too deeply into the bottle.
7. Loud Noise from the Machine
NO.1: Loose black strap at the bottom of the machine.Solution: Tighten the black strap.
NO.2: Loud decompression sound.Solution: Tighten the decompression valve counterclockwise.
NO.3: Air compressor noise with low oxygen concentration.Solution: Replace the air compressor.
NO.4: Air compressor noise with normal oxygen concentration.Solution: Replace the piston ring or the air compressor.
NO.5: Electronic valve malfunction.Solution: Replace the electronic valve.
8. Low Oxygen Purity
1)For New Units: Check for air leakage in internal tubing or components. Replace damaged parts if needed.2)For Units Over 5000 Hours: Replace the air compressor or molecular sieves.
9. Unstable Flow Rate
Minor fluctuation (0.5-1L): Normal operation.Substantial fluctuation (1-2L): Replace the electronic valve.Uncontrollable fluctuation (1-5L): Replace the electronic valve.
10. Air Compressor Not Working
Step 1: Check if the PCB is supplying power.Replace the PCB if necessary.Step 2: Ensure proper connection between the air compressor and PCB.Step 3: Check and replace the capacitor if needed.
11. Alarms Displayed on LCD Screen
"E3" Alarm:Ensure the alarm device is connected properly. Reconnect cables if necessary.If oxygen purity is low, follow steps in Section 8.Other Alarms:Power failure or high operating temperature. Refer to Sections 1 or 7.
