Error code reference

Samsung Air Conditioner Error Code E185

Power input error into indoor unit communication line - 220V applied to comm terminal block F1/F2.

SourceSamsung Air Conditioner - Service Manual: Troubleshooting & PCB Setup (AVXC4H)p. 4-23, 4-44

Diagnostic procedure

The full E185 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 for disconnected line after turning off main power; reconfirm indoor unit comm line connection.

SourceSamsung Air Conditioner - Service Manual: Troubleshooting & PCB Setup (AVXC4H)p. 4-23, 4-44

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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