How House Works

MrCool AP on the display: Wi-Fi setup mode

By How House Works EditorialBased on MrCool manualsChecked against sources Updated

MrCool display

AP

“AP Mode of Wifi Connection”

DIY 5th Gen, DIY Select, Easy Pro, Advantage 5th Gen, DIY 4th Gen Multi-Zone · DIY 5th Gen owner's p. 39; Select owner's p. 41; Easy Pro owner's p. 41; Advantage 5th Gen owner's p. 46; DIY 4th Gen multi-zone guide Troubleshooting 4
Owner can check

Wi-Fi setup mode. Marked “Normal Display, not error code” in the Select, Easy Pro and Advantage 5th Gen tables and the DIY 4th Gen multi-zone guide; the DIY 5th Gen single-zone table has no mark. DIY Select and Easy Pro print “Wi-Fi”; Advantage and the 4th Gen guide print “WIFI”. The remote control manual says AP mode is used to complete wireless network configuration and is entered by pressing the LED button seven times within ten seconds (Mini-Split Remote Control Owner's Manual, p. 10).

What it means

AP on the indoor display is the Wi-Fi setup mode. The code tables call it “AP Mode of Wifi Connection” DIY 5th Gen Single-Zone Installation & Owner’s Manual, p. 39. Of the tables that list AP, those that mark it “Normal Display, not error code” are DIY Select, Easy Pro, Advantage 5th Gen and the DIY 4th Gen multi-zone guide DIY Select Installation & Owner’s Manual, p. 41; Easy Pro Installation & Owner’s Manual, p. 41; Advantage 5th Gen Installation & Owner’s Manual, p. 46; DIY 4th Gen Multi-Zone Troubleshooting & Solutions Guide, Troubleshooting p. 4. The DIY 5th Gen single-zone table lists AP without that mark. The remote control manual explains its purpose: “Choose AP mode to complete wireless network configuration.” Mini-Split Remote Control Owner’s Manual, p. 10.

The wireless network it sets up is for the wireless control feature, which lets app-control units be run from a mobile phone DIY 5th Gen Single-Zone Installation & Owner’s Manual, p. 11.

Check these first

  1. If you are setting up Wi-Fi, AP is the expected display. The remote control manual says that on some units the SET button does not work for this, and gives the other way in: “To enter AP mode, continuously press the LED button seven times within ten seconds.” Mini-Split Remote Control Owner’s Manual, p. 10.
  2. The app side is in a separate document. The DIY 5th Gen quick start says the smartphone app setup instructions come with the Smart Controller Module DIY 5th Gen Quick Start Guide, p. 2. Those instructions are not among the documents used for this page.
  3. If AP appeared and you did not start Wi-Fi setup: the manuals used here do not say what else starts AP mode, how long it lasts, or how to leave it.
  4. The remote control manual used here covers DIY wall-mounted air handlers, Easy Pro, Advantage and Olympus wall-mounted and ducted air handlers (Mini-Split Remote Control Owner’s Manual, cover). For other units, check the remote manual that came with yours.

When to call a licensed technician

The manuals give no service step for AP. If the display shows a code from the EH, EL, EC or PC groups, that is an error code; the table on the MrCool page lists them by series. For an error code, the DIY 5th Gen manual’s procedure is to wait about 10 minutes, then disconnect and reconnect the power, and to contact MrCool if the code persists DIY 5th Gen Single-Zone Installation & Owner’s Manual, p. 38; other series’ manuals word this step differently.

Notes for different models

  • Select prints “Wi-Fi” and Advantage “WIFI” DIY Select Installation & Owner’s Manual, p. 41; Advantage 5th Gen Installation & Owner’s Manual, p. 46.
  • DIY 4th Gen multi-zone: the display list includes a symbol for the “AP mode of WIFI connection” DIY 4th Gen Multi-Zone Installation & Owner’s Manual, p. 8.
  • DIY E Star 3rd Gen: the error table has no AP. It has P7, “USB Smart Controller module not installed” DIY E Star 3rd Gen Installation & Owner’s Manual, p. 39.

Related MrCool codes

  • CP “Remote Switched Off”
  • P7 “USB Smart Controller module not installed”

See also

Other ductless mini-splits: Daikin, Fujitsu, Mitsubishi Electric

All MrCool codes

MrCool is a trademark of its owner. How House Works is not affiliated with or endorsed by MrCool.

Sources

  1. MRCOOL. DIY 5th Gen Single-Zone Installation & Owner's Manual. Version Date August 5, 2026; file suffix -01; no document number printed. Cover title: DIY Series Single-Zone Mini-Split System, Installation & Owner's Manual. Accessed Oct 13, 2026.
  2. MRCOOL. DIY 5th Gen Quick Start Guide. No Version Date and no page numbers printed; two pages, cited by PDF page. Accessed Oct 13, 2026.
  3. MRCOOL. DIY Select Installation & Owner's Manual. Version Date August 5, 2026; no file suffix; no document number printed. Accessed Oct 13, 2026.
  4. MRCOOL. Easy Pro Installation & Owner's Manual. Version Date August 5, 2026; no file suffix; no document number printed. Cover title: MRCOOL DIY Easy Pro Mini-Split System. Accessed Oct 13, 2026.
  5. MRCOOL. Advantage 5th Gen Installation & Owner's Manual. Version Date September 19, 2025; file suffix -01; no document number printed. Accessed Oct 13, 2026.
  6. MRCOOL. Mini-Split Remote Control Owner's Manual. Version Date June 1, 2026; file suffix -01; for DIY wall-mounted air handlers, Easy Pro, Advantage and Olympus wall-mounted and ceiling-recessed ducted air handlers. Accessed Oct 13, 2026.
  7. MRCOOL. DIY 4th Gen Multi-Zone Installation & Owner's Manual. Version Date 06-06-2023; file suffix -01; no document number printed. Not listed on MrCool's documentation page on 2026-10-13; the file is on MrCool's own file host.. Accessed Oct 13, 2026.
  8. MRCOOL. DIY 4th Gen Multi-Zone Troubleshooting & Solutions Guide. Version Date 10-22-21; file suffix -01; pages are numbered within the Troubleshooting section, cited as printed (Troubleshooting 4). A technician document. MrCool's documentation page labels it the owner's manual for 4th Gen DIY.. Accessed Oct 13, 2026.
  9. MRCOOL. DIY E Star 3rd Gen Installation & Owner's Manual. Version Date 03-21-23; file suffix -01; no document number printed. Not listed on MrCool's documentation page on 2026-10-13; the file is on MrCool's own file host. The code table's text layer is scrambled, so it was read from the page image.. Accessed Oct 13, 2026.