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7105

7105 - Address setting error

Mitsubishi Electric · Air Conditioning

What does 7105 mean?

This error indicates that either the outdoor unit (OC) or the branch controller (BC) has been assigned an incorrect address.

Common Causes

  • Incorrect addressing of OC (outdoor unit)
  • Incorrect addressing of BC (branch controller)
  • Conflict in unit addresses

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check and correct the address setting for the outdoor unit (OC).

  2. 2

    Verify and adjust the address setting for the branch controller (BC).

  3. 3

    Ensure no two units share the same address.

  4. 4

    Refer to the installation guide for address setting procedures.

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 14)Search more codes in this manual