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CN10A connector or lead wires disconnected

Connector CN10A or wires disconnected — Indoor electronic control P.C. board connection issue

Mitsubishi Electric · Air Conditioning

What does CN10A connector or lead wires disconnected mean?

The CN10A connector on the indoor electronic control P.C. board or its associated lead wires are disconnected. This disrupts power or signal to the board.

Common Causes

  • Disconnected CN10A connector
  • Loose or broken lead wires connected to CN10A
  • Vibration or improper installation

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the power supply.

  2. 2

    Reconnect the CN10A connector securely to the indoor electronic control P.C. board.

  3. 3

    Inspect the lead wires for any damage and repair or replace as needed.

  4. 4

    Ensure the connection is stable and properly seated.

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 27)Search more codes in this manual