EF (6607 or 6608)

Non-Defined Error Code

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

What does EF (6607 or 6608) mean?

This code is displayed when the unit receives an undefined error code. Possible root causes include noise in the remote controller transmission wire or indoor/outdoor connecting wire, the outdoor unit not being an inverter model, or the use of an incompatible remote controller model (PAR-S21A).

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    If the remote controller model is PAR-S21A, replace it with an MA remote controller.

Source: Mitsubishi PUZ-HA30-36NHA4 Outdoor Unit
Open Manual (Page 30)