20

ACTM Error

Mitsubishi Electric · Mitsubishi PUZ-HA30-36NHA4 Outdoor Unit

What does 20 mean?

An error related to the Automatic Current Tracking Module (ACTM) has occurred. This module is essential for accurate current sensing and control, and an error can impact compressor operation and protection, often associated with the power board.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Inspect the power circuit board (P.B) for any visible defects or component failure.

Source: Mitsubishi PUZ-HA30-36NHA4 Outdoor Unit
Open Manual (Page 68)