Skip to content
EN

Mitsubishi Electric · Mitsubishi Electric MSZ-AP (wall-mounted split, R32) · Procedure

Mitsubishi MSZ-AP: reading a stored fault with the remote controller

Summary (editorial)

The unit remembers an abnormal condition that has occurred. The manual describes the failure mode recall with the remote controller and how to release it afterwards.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

From the manufacturer's documentation (English source wording, with page)

  1. The air conditioner memorizes the abnormal condition which has occurred once; it can be recalled even after the LED indication disappears[1]
  2. While pressing OPERATION SELECT and TEMP buttons, press RESET; release RESET first, hold the other 2 buttons for another 3 seconds[2]
  3. Press STOP/OPERATE (OFF/ON) with the remote controller headed towards the indoor unit[3]
  4. Upper lamp blinks at 0.5 s interval with beep: indoor or outdoor abnormal; 3 s ON before blinking: outdoor unit abnormal[4]
  5. Check at least 2 consecutive blinking cycles[5]
  6. Release: turn OFF the power supply and turn it ON again; press RESET button of the remote controller[6]
  7. Make sure to release the failure mode recall function after it is set up, otherwise the unit cannot operate properly[7]
  8. It takes up to 1 minute to indicate the outdoor unit abnormality[8]

⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] Mitsubishi Electric – Service Manual: Indoor unit MSZ-AP25VG(K) … MSZ-AP71VG(K) (OBH788 REVISED EDITION-B) (OBH788 REVISED EDITION-B) , p. 30 official manufacturer document quote verified This air conditioner can memorize the abnormal condition which has occurred once.
  2. [2] Mitsubishi Electric – Service Manual: Indoor unit MSZ-AP25VG(K) … MSZ-AP71VG(K) (OBH788 REVISED EDITION-B) (OBH788 REVISED EDITION-B) , p. 30 official manufacturer document quote verified While pressing both OPERATION SELECT button and TEMP
  3. [3] Mitsubishi Electric – Service Manual: Indoor unit MSZ-AP25VG(K) … MSZ-AP71VG(K) (OBH788 REVISED EDITION-B) (OBH788 REVISED EDITION-B) , p. 30 official manufacturer document quote verified Press STOP/OPERATE (OFF/ON) button of the remote controller (the set temperature is
  4. [4] Mitsubishi Electric – Service Manual: Indoor unit MSZ-AP25VG(K) … MSZ-AP71VG(K) (OBH788 REVISED EDITION-B) (OBH788 REVISED EDITION-B) , p. 30 official manufacturer document quote verified Before blinking, does the upper lamp on the
  5. [5] Mitsubishi Electric – Service Manual: Indoor unit MSZ-AP25VG(K) … MSZ-AP71VG(K) (OBH788 REVISED EDITION-B) (OBH788 REVISED EDITION-B) , p. 30 official manufacturer document quote verified Make sure to check at least 2 consecutive blinking cycles.
  6. [6] Mitsubishi Electric – Service Manual: Indoor unit MSZ-AP25VG(K) … MSZ-AP71VG(K) (OBH788 REVISED EDITION-B) (OBH788 REVISED EDITION-B) , p. 30 official manufacturer document quote verified Turn OFF the power supply and turn it ON again.
  7. [7] Mitsubishi Electric – Service Manual: Indoor unit MSZ-AP25VG(K) … MSZ-AP71VG(K) (OBH788 REVISED EDITION-B) (OBH788 REVISED EDITION-B) , p. 30 official manufacturer document quote verified Make sure to release the failure mode recall function after it is set up
  8. [8] Mitsubishi Electric – Service Manual: Indoor unit MSZ-AP25VG(K) … MSZ-AP71VG(K) (OBH788 REVISED EDITION-B) (OBH788 REVISED EDITION-B) , p. 30 official manufacturer document quote verified It takes up to 1 minute to indicate the outdoor unit abnormality.