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Samsung Refrigerators2010–present

Error Code IO-EXPANDER

IO expander chip not responding

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: LED blinks

What This Means

IO Expander chip malfunction; Main PCB circuit failure around IO Expander; I2C bus communication failure; Soldering issue on IO Expander

What actually causes this:

IO Expander chip failed or soldering defect

First Thing to Check

Check main PCB for cold solder joints around IO Expander

Parts Involved

Main PCB IO Expander IC

How to Fix

  1. 1

    1. Verify I2C communication lines on main PCB

  2. 2

    2. Check IO Expander chip solder connections

  3. 3

    3. Test with oscilloscope for signal presence

  4. 4

    4. If signals absent, replace main PCB

This Error Applies To

Samsung RF24R7201 Series Refrigerators (2010) (2010–present)

Service manual exact match: RF24R7201AAService manual exact match: RF24R7201EGService manual exact match: RF24R7201SAService manual exact match: RF24R7201EOService manual exact match: RF24R7201APService manual exact match: RF24R7201EUService manual exact match: RF24R7201EFService manual exact match: RF24R7201FA

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