Skip to content
EN

Mitsubishi Electric · Split air conditioners · Mitsubishi Electric MSZ-AP (wall-mounted split, R32)

Lamp litOutdoor control system (upper lamp lights up, outdoor unit does not operate)

Name in the manufacturer's documentation (service manual): Outdoor control system (upper lamp lights up, outdoor unit does not operate)[1]

In plain words (editorial)

The lamp is lit but the outdoor unit does not operate – a fault in the outdoor control system. The service technician reads the LED blink pattern on the outdoor PCB to find the cause.

When to call a service technician: Contact an authorised Mitsubishi Electric service technician.

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

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. 34 official manufacturer document quote verified Upper lamp lights up
  2. [2] Mitsubishi Electric – Service Manual: Indoor unit MSZ-AP25VG(K) … MSZ-AP71VG(K) (OBH788 REVISED EDITION-B) (OBH788 REVISED EDITION-B) , p. 34 official manufacturer document quote verified outdoor unit does not oper-
  3. [3] Mitsubishi Electric – Service Manual: Indoor unit MSZ-AP25VG(K) … MSZ-AP71VG(K) (OBH788 REVISED EDITION-B) (OBH788 REVISED EDITION-B) , p. 34 official manufacturer document quote verified check the blinking pattern of