E.CPU

CPU Fault

Mitsubishi Electric · Mitsubishi FR-E800 Variable Frequency Drive

What does E.CPU mean?

The inverter output is shut off due to a communication fault within the built-in CPU, potentially indicated by specific sub-faults (E.5, E.6, E.7 on FR-LU08). This can be triggered by excessive electrical noise in the environment or an improper connection of an Ethernet communication cable. An internal CPU fault can render the inverter inoperable.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    If the issue persists after addressing noise and cable connections, contact your sales representative.

Source: Mitsubishi FR-E800 Variable Frequency Drive
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