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All LEDs off

All outdoor unit LEDs off - No power

Samsung · Air Conditioning

What does All LEDs off mean?

If all LEDs on the outdoor unit are off, it indicates that the unit is not receiving power. This means the system is not operating.

Common Causes

  • No power supply
  • Faulty power cord
  • Incorrect wiring
  • Faulty outdoor unit main board (PBA)
  • Fuse disconnected

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check if the air conditioner's circuit breaker has tripped and reset it.

  2. 2

    Ensure the unit is properly plugged into a functional power outlet.

  3. 3

    Verify the power supply to the outdoor unit is stable.

  4. 4

    Wait 3 minutes, then try powering the unit on again.

  5. 5

    If the issue persists, contact a qualified technician.

Browse all codes in this manual (137)
Verified technical data. Last updated: April 2026

Related Faults

Abnormal displayAbnormal outdoor LED display - Error modeC101/C102C101 or C102 - Indoor to outdoor communication errorC121C121 - Indoor room temperature sensor error
Source: Samsung Air Conditioning
Open Manual (Page 110)Search more codes in this manual