What Are Warning Lights on Oxygen Concentrator?

Oxygen concentrators are essential for individuals managing chronic respiratory conditions like COPD, asthma, or lung disease. Whether you're using a home oxygen concentrator like the VARON Serene 5 or a portable device such as the VARON VP-2, understanding the warning lights on your unit is critical for safety and uninterrupted therapy.

This guide will help you decode common oxygen concentrator error codes, especially for VARON models, including error codes, light indicators, and what action to take when these alerts appear.

Low Battery Indicator: Know Your Battery Status

For oxygen concentrator error codes VARON models, especially the VP-1 and VP-2, battery indicators are crucial during travel or outdoor use. Your device has four battery lights to help you monitor remaining power:

• 4 lights on — battery ≥ 90%

• 3 lights on — 75% ≤ battery < 90%

• 2 lights on — 50% ≤ battery < 75%

• 1 light on — 25% ≤ battery < 50%

• 1 light flashing — battery < 25%

Error Code F0001 indicates low battery with a yellow light.

What to Do:

• Connect to a power source or switch to an external battery.

• Avoid full depletion to ensure the device doesn't shut down unexpectedly.

No Breath Detected: Pulse Mode Safety

This warning applies to pulse flow models like VARON VP-1 and VP-2. These devices only release oxygen when they detect inhalation. If breathing is not detected, you’ll see:

• Error Code F0002

• Yellow warning light

• Possibly no oxygen delivery

What to Do:

• Ensure the nasal cannula is properly connected and not kinked or blocked.

• Confirm that tubing is secure.

• Look for the breath signal light, which flashes with each detected breath.

• If the problem persists, contact VARON support.

High Temperature Alert: Protecting Your Unit

VARON oxygen concentrator error codes include internal temperature sensors. If the machine overheats, you may see:

• Error Code F0011

• Red light and audible alarm

Possible Causes:

• Blocked air inlets or dirty filters

• High ambient temperatures

• Continuous use in poor ventilation

What to Do:

• Turn off the unit and let it cool.

• Clean or check air filters.

• Use in a well-ventilated environment.

Oxygen Sensor Abnormality: Accuracy Alert

When oxygen purity monitoring fails, the unit displays:

• Error Code F0012

• Audible alarm, but no color light specified

What to Do:

• Restart the device.

• If the alert persists, contact VARON support.

• Avoid using the device until it’s professionally inspected.

Low Concentration Warning: When Therapy May Be Compromised

One of the most important alerts is the low oxygen concentration warning. This signals that the oxygen output has dropped to levels that may not meet therapeutic needs.

What You’ll See:

• Error Code F0006 — oxygen < 82%, yellow light

• Error Code F0007 — oxygen < 50%, yellow light and loud alarm

Why It Matters:

Oxygen levels below 82% may be inadequate for many patients.

Most Common Cause:

• Degraded sieve bed performance — Over time, the molecular sieve inside the concentrator wears out, reducing efficiency.

What to Do:

• Contact VARON to arrange sieve bed replacement or internal inspection.

• Avoid DIY fixes that may void warranty or worsen the issue.

Alarm Codes and Light Summary for VARON Oxygen Concentrators

Alarm Light: Red or yellow depending on the alert
Breath Signal Light: Flashes when the device detects user inhalation

Final Thoughts: Trust the Lights, Ensure Safe Oxygen Use

The warning lights on your oxygen concentrator are there to protect your health and the device. By understanding these indicators—and responding appropriately—you can avoid emergencies and ensure reliable therapy.

All VARON oxygen concentrators come with user manuals that explain error codes and maintenance tips. For any persistent issues or technical questions, contact VARON customer support for fast assistance and replacement services, including sieve bed replacements.