E30

Indoor/Outdoor Unit Connected Error

Mitsubishi Electric · Mitsubishi FR-D700 Inverter

What does E30 mean?

This error indicates a problem with the connection or communication between the indoor and outdoor units. It prevents proper system operation and coordination.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Ensure stable power supply to both indoor and outdoor units, checking voltage levels at main terminals.

Source: Mitsubishi FR-D700 Inverter
Open Manual (Page 3)