Error Code 81

Compressor will not start or is stalled

Also displayed as: 81

What This Means

Inverter PCB soldering defects or shorted components; SMPS (power supply) voltage insufficient — DC 15V below 13.5V; Compressor electrical fault or mechanical lock; Compressor wiring disconnected or damaged; Inverter protection activated

First Thing to Check

Parts Involved

How to Fix

1. 1

   1. Check DC 15V power output from SMPS — should be at least 13.5V

2. 2

   2. Inspect Inverter PCB for burned or swollen components

3. 3

   3. Check compressor wiring connections for corrosion or looseness

4. 4

   4. Measure compressor winding resistance (power off) — should be 2-5 ohms per phase

5. 5

   5. Listen for compressor buzzing (indicates mechanical stall)

6. 6

   6. If all checks pass, replace Inverter PCB

This Error Applies To

Samsung RF22K9581 Series Refrigerators (2016) (2016–present)