Samsung RF28R7201SARefrigerator
Error Code MAIN-INV
Compressor control board communication failed
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: MAIN-INV LED blinks
What This Means
Communication cable disconnected; Inverter PCB failure; Corrupted signal
What actually causes this:
Inverter cable loose or inverter circuit board faulty
First Thing to Check
Check if compressor attempts to run
Parts Involved
Main PCBInverter PCBCommunication Cable
How to Fix
- 1
Verify inverter cable connection
- 2
Check soldering on inverter PCB
- 3
Use oscilloscope to test signal
- 4
If cable OK, replace inverter PCB
Other Error Codes for RF28R7201SA
IM-FUNC
Ice maker not making ice
IO-EXP
Main board input/output chip failure
DISP-PANEL
Dispenser display not communicating
ICE-ROOM-HT
Ice storage compartment heater failure
F
Freezer temperature sensor not working
RF
Fridge cooling fan malfunction
FZ-DMH
Flex zone temperature control heater failure
IR-FAN
Ice room fan not operating