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28

2 flashes, 8 beeps - DC Link High Voltage

LG · Air Conditioning

What does 28 mean?

This error indicates that the DC Link voltage within the inverter system has become too high. This can be caused by issues with the power supply or internal components.

Common Causes

  • DC Link high voltage detected

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the power to the unit.

  2. 2

    Check that the incoming power supply is stable and not experiencing surges.

  3. 3

    Reset the system by turning off the power for at least 1 minute.

  4. 4

    If the problem recurs, a technician should examine the inverter's voltage regulation.

Browse all codes in this manual (97)
Verified technical data. Last updated: April 2026

Related Faults

01Error 01 - Indoor air sensor open or short circuit02Error 02 - Inlet pipe sensor open or short circuit03Error 03 - Communication error between indoor unit and wired remote
Source: LG Air Conditioning
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