Troubleshooting4-374-4-10. Indoor/outdoor communication error (1min.) (Error Code : E202)1. Test items1) Check the communication wire and power wire connection.2) Check the communication connector connection.- CN31 of outdoor unit Main PCB3) Check the communication circuit on the PCB.2. Check procedureYesEnd the service.NoDoes communication error occurs?Check the communication wireand power wire connection.1. Are the communication wire connectionscorrectly assembled as F1 : Red, and F2 : Blue?2. Is the communication wire between the indoorunit and the outdoor unit correctly connected?3. Are the power connections (1(L), 2(N)) and thecommunication connections (F1, F2) correctlyconnected?4. Are the power wire [1(L), 2(N)] correctly assembled?(Refer to the electrical schematics and the powerfailure as explained above.)NoYesReplace the Main PCB of the outdoor unit.NoYesPower on 30 seconds after power off.Reconnect the communication connector.NoYesContinueCheck the communicationcircuit of the Main PCB of the outdoor unit.1. Is there a fault in communication IC?2. Is there a fault in TVS-Diode?Are the power wire and communication wirecorrectly connected?Check theconnection of thecommunication connector(CN31) of the Main PCB.1. Is the communication wire between theindoor unit and the outdoor unit correctly connected?2. Are the power wire (1(L), 2(N)) and the communicationwire (F1, F2) correctly connected?3. Are the power wire (1(L), 2(N)) correctlyassembled? (Refer to the electricalschematics and the powerfailure as explainedabove.)
