Error Code 84

Compressor motor has stalled and cannot reach operating speed

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: Error 84

What This Means

Locked rotor compressor operated within 5 seconds; Compressor running below 1000 RPM for more than 5 seconds; Sudden large voltage change; Refrigeration system issue (high head pressure)

What actually causes this:

The compressor motor has locked up or is running too slowly — often from a mechanical compressor failure or unusually high system pressure.

First Thing to Check

Check that the condenser fan at the back/bottom is running and that the condenser coils are not clogged with dust.

Parts Involved

Inverter PCBCompressorCapacitor C103Resistor R308

How to Fix

  1. 1

    Check resistance of R308 on Inverter PCB (short or open indicates fault)

  2. 2

    Check both terminals of capacitor C103 for unstable voltage

  3. 3

    Check compressor and refrigeration cycle for high head pressure

  4. 4

    Verify power supply stability

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