Error code reference

Samsung Air Conditioner Error Code E204

Communication error between outdoor units and MCU after completing initial tracking; inconsistency between number of setup MCUs and unit number setup switches.

SourceSamsung Air Conditioner - Service Manual: PCB Setup & Troubleshooting (AVXDSH036EE)p. 4-24, 4-53

Diagnostic procedure

The full E204 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check the communication lines between outdoor units and MCU; check the setup address switch on MCU; check number of MCU setup switch on outdoor unit PCB.

SourceSamsung Air Conditioner - Service Manual: PCB Setup & Troubleshooting (AVXDSH036EE)p. 4-24, 4-53

More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented

4 manuals in the MyPros+ library document this code for Samsung air conditioner.

Models covered by the manuals that document this code

75,000+ service documents · 20,000+ error codes · 100+ brands

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