semiatic

Signal bars and no-connection icons on a CPAP machine

Many machines have a built-in mobile (cellular) modem that sends your nightly data to your equipment provider; ResMed says it is usually sent after therapy has stopped. The bars show signal strength. No signal does not affect the therapy itself; it only means the data may not arrive.

Therapy settings: This page explains what a CPAP machine’s screen or light is telling you, in the maker’s words. It is not medical advice: ask your equipment provider or clinician about your therapy settings, and do not change your pressure or any prescribed setting because of anything here.

ResMed

  1. ResMed AirSense 10 An icon on the screen

    Wireless signal strength (green bars)

    Shown at the top right of the screen: all bars means good coverage, fewer bars means poor coverage.

    What ResMed says to do

    1. If your data has not been sent, place the machine where there is coverage: on your bedside table, not in a drawer or on the floor.
    2. Leave it connected to the power outlet and not in Airplane Mode; the data is usually sent after therapy stops.

    Source: AirSense 10 user guide (AirSense 10 AutoSet, AutoSet for Her, Elite and CPAP, with HumidAir) (ResMed, 378947/1, 2021-02), checked 2026-09-29.

  2. ResMed AirSense 10 An icon on the screen

    No wireless connection

    No wireless network is available.

    What ResMed says to do

    1. Place the machine where there is coverage (on your bedside table, not in a drawer or on the floor).
    2. If you have been told to, send the SD card to your care provider: it also holds your therapy data.

    Source: AirSense 10 user guide (AirSense 10 AutoSet, AutoSet for Her, Elite and CPAP, with HumidAir) (ResMed, 378947/1, 2021-02), checked 2026-09-29.

  3. ResMed AirSense 10 An icon on the screen

    Wireless transfer not enabled (grey)

    Data transfer is not enabled for your machine.

    What ResMed says to do

    1. Talk to your care provider about your settings.

    Source: AirSense 10 user guide (AirSense 10 AutoSet, AutoSet for Her, Elite and CPAP, with HumidAir) (ResMed, 378947/1, 2021-02), checked 2026-09-29.

  4. ResMed AirSense 11 An icon on the screen

    Cellular signal strength; No cellular connection

    The first shows the strength of the mobile connection; the second means cellular coverage is not available. Without a connection, therapy data may not reach your care provider and new prescription settings may not reach the machine.

    What ResMed says to do

    1. Place the machine where there is coverage (on your bedside table, not in a drawer or on the floor).
    2. Make sure it is not in Airplane Mode.

    Source: AirSense 11 user guide (Americas) (ResMed, 398133/2, 2021-10), checked 2026-09-29.

Everything else ResMed’s machines show: ResMed CPAP icons and messages.

Philips Respironics

  1. Philips Respironics DreamStation 2 An icon on the screen

    Cell modem signal strength

    Shows the signal strength of the cellular modem on machines that have one. It is not shown in Airplane Mode.

    The manual gives no step for a weak signal.

    Source: DreamStation 2 Auto CPAP / CPAP user manual (Philips Respironics, 1143534 R02, 06/11/2021), checked 2026-09-29.

Everything else Philips Respironics’s machines show: Philips Respironics CPAP icons and messages.

Fisher & Paykel Healthcare

  1. Fisher & Paykel Healthcare SleepStyle An icon on the screen

    Modem icon; modem icon with a line through it

    The modem icon shows the modem is on and working correctly (not available in every country). With a line through it, the modem is turned off or has failed to connect: you are still treated, but your data may not be uploaded to your healthcare provider.

    What Fisher & Paykel Healthcare says to do

    1. Section 5.1 (Modem) of the guide explains the modem setting. If the problem persists, contact your healthcare provider.

    Source: F&P SleepStyle Use and Care Guide (SleepStyle Auto, SleepStyle CPAP) (Fisher & Paykel Healthcare, Use and Care Guide, English section A), checked 2026-09-29.

Everything else Fisher & Paykel Healthcare’s machines show: Fisher & Paykel Healthcare CPAP icons and messages.

React Health

  1. React Health Luna G3 An icon on the screen

    Signal icons: strong, moderate, weak, no signal found

    With the optional Cellular Module fitted, one of four signal icons appears in the status bar. With a weak signal, data sending may slow down or stop; the module keeps searching until it finds a signal. No icon at all can mean the module is not connected properly or not working.

    What React Health says to do

    1. React Health warns not to place computers, televisions, radios or similar devices near the Cellular Module.

    Source: Luna G3 APAP / Luna G3 CPAP User Manual (React Health, V1.7, issue date February 29, 2024), checked 2026-09-29.

Everything else React Health’s machines show: React Health CPAP icons and messages.

Other things a CPAP machine shows

Sources

Each maker’s own user guide only, read on the date shown. Nothing here comes from third-party CPAP forums or “error code” sites.

Find any icon, message or light on your machine →