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Ed

Outdoor Board LED1 (green) blinks twice and LED2 (red) blinks nine times alternately - Remote controller signal receiving error is detected by indoor unit

MHI · Air Conditioning

What does Ed mean?

During startup or operation, the outdoor unit's LED1 (green) blinks twice and LED2 (red) blinks nine times alternately, indicating a remote controller signal receiving error detected by the indoor unit.

Common Causes

  • Remote controller signal receiving error detected by the indoor unit.
  • Noise entered into transmission wire of remote controller.
  • Incorrect wiring for the remote controller.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check if the connecting wire of the indoor unit or remote controller is connected correctly.

  2. 2

    Check if noise is entering into the transmission wire of the remote controller.

  3. 3

    Re-check the error by turning off the main power, waiting, and turning it back on.

Browse all codes in this manual (124)
Verified technical data. Last updated: April 2026

Related Faults

00Outdoor Board LED only green lights up after startup - No outdoor unit of address 0 / Remote controller transmission wire open1OPERATION INDICATOR lamp blinks 1 time (Pattern A) - Indoor/outdoor unit communication error (Transmitting error - Outdoor unit)14OPERATION INDICATOR lamp blinks 14 times (Pattern A) - Other errors
Source: MHI Air Conditioning
Open Manual (Page 59)Search more codes in this manual