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3

OPERATION INDICATOR lamp blinks 3 times (Pattern A) - Compressor overcurrent interruption (Compressor locked)

MHI · Air Conditioning

What does 3 mean?

The OPERATION INDICATOR lamp blinks three times in 'Output pattern A' from the indoor unit, indicating that the compressor has stopped due to an overcurrent, likely because it is locked.

Common Causes

  • Compressor overcurrent.
  • Compressor locked during operation.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check for looseness, disconnection, or incorrect connection of the compressor wiring.

  2. 2

    Measure the resistance values among the terminals on the compressor using a tester.

  3. 3

    Ensure the power supply voltage is stable and within the specified range.

  4. 4

    If the issue persists, a qualified technician should inspect the compressor.

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 23)Search more codes in this manual