FAULT 21 FAULT with 21 flashing
What it means: Treatment pressure has not been programmed.
What to do: Stop using it and contact your healthcare provider or Breas Medical Service at 1-855-436-8724. Only your provider can program your pressure.
Breas Z2 Auto Travel CPAP
Find the message on your screen below. Most alerts clear with a simple check: the water chamber seated, the tube connected, the filter clean. If a code keeps coming back after the fix, stop using the machine and contact your equipment supplier or the manufacturer.
What it means: Treatment pressure has not been programmed.
What to do: Stop using it and contact your healthcare provider or Breas Medical Service at 1-855-436-8724. Only your provider can program your pressure.
What it means: The device is overheating.
What to do: Let it cool and see whether the code clears. Make sure bedding is not blocking the intake. If it does not clear, stop and contact your provider or Breas at 1-855-436-8724.
What it means: Over current fault.
What to do: Stop using it and contact your provider or Breas at 1-855-436-8724.
What it means: Over pressure fault.
What to do: Stop using it and contact your provider or Breas at 1-855-436-8724.
What it means: You tried to restart while the motor was still running.
What to do: Wait at least 10 seconds, then press Start/Stop again.
What it means: You tried to set ramp start pressure while ramp time was 0.
What to do: Set ramp time to at least 5 minutes first, then set the start pressure.
What it means: Someone tried to save a treatment pressure while the device is locked.
What to do: Treatment pressure changes can only be made by a trained healthcare provider. Contact your provider if you think your pressure needs to change.
What it means: The internal battery needs replacing, so the device has stopped logging data. Therapy continues.
What to do: Call Breas at 1-855-436-8724 to arrange the internal battery replacement. You can keep using therapy until then.
No matching code. Check the exact text on the screen, or see the troubleshooting section on the machine page.
Last reviewed October 11, 2026. How we research · Report an error