Troubleshooting40Samsung Electronics3-3 Communication error (1 minute) between Main and Sub Micoms of an Outdoor unit or amongOutdoor Units (Error Code : E203)1. Check items1) Is there power on outdoor unit inverter PBA?2) Connect the power cable/check the fuse3) Is there any problem on communication cable between outdoor unit inverter (CN31) <-> Main PBA (CN39)?4) Check the communication cable connection2. Check procedureYesEnd service.NoIs there any communication error?Connect the power cable/check the fuse.1. Is there any problem on the power cable betweenoutdoor unit main ↔ EMI PBA?2. Is there any problem on the power cable betweenoutdoor unit inverter ↔ EMI PBA?3. Is the fuse (FUSE100) on outdoor unit inverter PBAnormal? (Short-Normal, Open-Abnormal.Only applies to RDSSSHXHS series)NoYesTurn off the power and turn iton again after 30 seconds.Change the outdoor unit inverter or main PBA.1. If the 7-segment on the outdoor unit main PBAshows E203 error, change the PBA → outdoor unitmain PBA is normal.2. When the LED on the outdoor unit inverter is shownas following; Red-On, Green-On, Orange-Blinkingand if the 7-segment on the outdoor unit main PBAdoes not display anything, change the main PBA →Outdoor unit inverter PBA is normal.[Check list for AMSSSSXMDCS series][Check the LED on inverter PBA]Check the communication cable connection.NoYes[Check list for AMSSSSXMDCS series]Is there power on Inverter PBA?Inverter PBA connector (CN31)MAIN PBA connector (CN39)Is there any problem oncommunication cable between outdoor unit inverter(CN31) ↔ Main PBA (CN39)?[AMSSSSXMDCS seriesinverter PBA LED][7-segment onMain PBA (Common)]
