EC
Midea Compressor Drive / Inverter Communication Fault

Display shows EC and the compressor does not start or runs briefly then stops.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Faulty inverter board (for inverter compressors), Loose communication harness between main PCB and inverter, Failed compressor windings, Power surge damage to control electronics

How to Fix / Troubleshooting

Safety First: Unplug the refrigerator. Compressor and inverter circuits carry dangerous voltages.

Steps:

  • Check for obvious damage: Remove the rear lower panel and inspect the inverter module (if equipped) mounted near the compressor for burn marks or melted components.
  • Inspect wiring: Verify that the harness between the main control board and inverter is fully seated at both ends and not damaged.
  • Power reset: Leave the unit unplugged for 10–15 minutes, then reconnect and listen for the compressor attempting to start.
  • Compressor test (advanced): With power disconnected, measure resistance between compressor terminals. Very high or zero readings may indicate a failed compressor.
  • Replace inverter or main PCB: If wiring is intact and compressor windings test normal, the inverter board or main control board may be defective. Replace with the correct Midea part.
  • Professional help: If you are not experienced with high-voltage electronics or sealed-system components, contact a qualified technician.
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Repair Difficulty

Professional Required 5/5

Required Part

Compressor Inverter Board
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