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EE

7-time blink - Indoor and outdoor unit combination mismatch

Mitsubishi Electric · Air Conditioning

What does EE mean?

The operation indicator lamp blinks seven times. This error occurs when the refrigerant types specified for the indoor and outdoor units do not match.

Common Causes

  • Incorrect indoor unit selected for outdoor unit
  • Incorrect outdoor unit selected for indoor unit
  • Refrigerant type mismatch during installation

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that the indoor and outdoor units are compatible and listed as a valid combination.

  2. 2

    Check the refrigerant type specified for both units.

  3. 3

    Consult installation documentation for correct unit pairing.

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 37)Search more codes in this manual