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E1

E1 - Remote controller issue

Mitsubishi Electric · Air Conditioning

What does E1 mean?

This code points to a problem with the remote controller, particularly when units are grouped. Addressing issues might be necessary.

Common Causes

  • Incorrect addressing of grouped units
  • Faulty remote controller
  • Wiring issue to the remote controller

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the addressing of grouped units.

  2. 2

    If units are twinned, ensure wiring is correctly connected only to the master indoor unit.

  3. 3

    Inspect remote controller wiring.

  4. 4

    Try resetting the remote controller.

Browse all codes in this manual (170)
Verified technical data. Last updated: April 2026

Related Faults

0.5-second ON / 0.5-second OFF blinkUpper lamp blinks 0.5-second ON/OFF - Miswiring or serial signal error00Normal operation - No error codes1 beep during error display mode1 beep during error display mode - Unit has an error (different code)
Source: Mitsubishi Electric Air Conditioning
Open Manual (Page 17)Search more codes in this manual