How do I fix error code COMP-START-FAILURE on a Samsung refrigerators?

1. undefined: Check for short between compressor terminals CN102 2. undefined: Check IPM voltage — must be above DC 13.5V 3. undefined: Check for short between IPM pins 1-33 4. undefined: Inspect inverter PCB soldering for bridged joints 5. undefined: Check compressor and refrigeration cycle for mechanical blockage

Samsung Refrigerators2022–present

Error Code COMP-START-FAILURE

Compressor tried to start but failed due to electrical or mechanical fault

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: LED blinks per inverter protection table

What This Means

Short between compressor U, V, W phase terminals (CN102); Short among IC3 (IPM) pins 1-24; IPM operating voltage dropped below DC 13.5V; Compressor winding fault; Failed refrigeration cycle (blocked)

What actually causes this:

The compressor could not start, either because of an electrical short, a failed component on the inverter circuit board, or the compressor itself is seized.

First Thing to Check

Unplug the fridge for 10 minutes and plug back in — normal operation resumes if it was a transient fault.

Parts Involved

Inverter compressor NF54M5151ARTT3IPM (Intelligent Power Module) IC3MAIN PCB / Inverter PCBCN102 connector

How to Fix

1
Check for short between compressor terminals CN102
2
Check IPM voltage — must be above DC 13.5V
3
Check for short between IPM pins 1-33
4
Inspect inverter PCB soldering for bridged joints
5
Check compressor and refrigeration cycle for mechanical blockage

This Error Applies To

Samsung RF25C5 Series Refrigerators (2022) (2022–present)

Service manual exact match: RF25C5151SR/AAService manual exact match: RF25C5151**Service manual exact match: RF25C5551**Service manual exact match: RF25C5551SR/AA