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ErrorLib — Industrial Fault Code Library

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E3

Remote Controller Signal Receive Error (Remote Controller Side)

Mitsubishi Electric · PAR-21MAA MA Remote Controller

What does E3 mean?

The remote controller itself has detected an error in receiving signals, either from other components or its own internal processes. This indicates a problem with the remote controller unit or its immediate communication line, preventing it from processing incoming data correctly.

Common Causes

  • Remote controller fails to receive signals from the indoor unit.
  • Faulty remote controller cable connection or wiring.
  • Interference affecting the remote controller signal.
  • Indoor unit's remote controller interface is not functioning correctly.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the remote controller model is an MA remote controller (PAR-21MAA) as specified.

  2. 2

    Inspect the transmission wire connected to the remote controller for signs of electrical noise interference.

  3. 3

    Cycle power to the unit (turn off, then on again) to re-check for the error.

Browse all codes in this manual (26)
Verified technical data. Last updated: April 2026

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Source: Mitsubishi Electric PAR-21MAA MA Remote Controller
Open Manual (Page 48)Search more codes in this manual