Error Code 45
Right compressor control board is not communicating with main board
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: Communication Error between Main ↔ R-Comp Inverter
What This Means
Inverter communication cable disconnected; Cable damaged or shorted; Refrigerator compressor inverter PCB failure; Main PCB failure; UART signal loss
What actually causes this:
Cable damage or right inverter board failure
First Thing to Check
Inspect cable between main PCB and R inverter connector
Parts Involved
How to Fix
- 1
Check inverter communication cable seating
- 2
Verify cable is not damaged
- 3
Check for loose connectors
- 4
An oscilloscope is recommended to verify signals
- 5
Replace main or inverter PCB as needed
This Error Applies To
Samsung BRF425200A Series Refrigerators (2017) (2017–present)
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