Error Code 44Er
Main control board and inverter board cannot communicate
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: 44Er on panel
What This Means
Wiring harness between main and inverter PCB is shorted or open; Resistor R210 or R212 shorted or open; Terminal CN103 issue on inverter board; Defective main PCB; Defective inverter PCB
What actually causes this:
A failed resistor on the inverter board or a damaged harness running between the main and inverter PCBs.
First Thing to Check
Inspect the harness between main and inverter PCB for any visible damage or loose connectors.
Parts Involved
How to Fix
- 1
Check terminal CN103 on inverter board
- 2
Check resistors R210 and R212 for short or open
- 3
Inspect harness between main and inverter PCB for damage
- 4
Use oscilloscope to confirm communication signal
- 5
Replace main and inverter PCB if wiring is confirmed good
This Error Applies To
Samsung RH22H9010S Series Refrigerators (2018) (2018–present)
Related Error Codes
Display panel and main control board cannot communicate
I/O expander chip on main board has a communication fault
There is a configuration mismatch between the panel and main boards
Refrigerator is in Cooling Off mode — not cooling
Unit is in forced manual operation / cooling test mode
Unit is in forced defrost mode