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Resistance of resistor (R111) not approximately 4 Ω

Resistor (R111) resistance not approx. 4 Ω — Indoor P.C. board issue

Mitsubishi Electric · Air Conditioning

What does Resistance of resistor (R111) not approximately 4 Ω mean?

The resistance of resistor R111 on the indoor power P.C. board is not approximately 4 ohms. This indicates a fault with the resistor or the board itself.

Common Causes

  • Faulty resistor R111 on indoor P.C. board
  • Damage to the indoor electronic control P.C. board

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the power supply.

  2. 2

    Replace the indoor electronic control P.C. board.

  3. 3

    If R111 is a replaceable component, consider replacing just the resistor if accessible and technician has capability.

  4. 4

    Re-measure after replacement to confirm correct resistance.

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

Related Faults

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Source: Mitsubishi Electric Air Conditioning
Open Manual (Page 26)Search more codes in this manual