Samsung AC026NNNDKH Service Manual

Also see for AC026MXADKH: Installation manual Service manual

Contents

4-10Samsung Electronics4-2 Items to check before diagnostics4-2-1 Four directions cassette typeError ModeCause MeasuresProduct operation with errorDiagnosismethodOperation Defrost Timer FilterOutdoor UnitcompressorOutdoorUnit fanindoorUnitheat fanX X X Power reset - operation-off operation-off operation-off -X X XError of roomtemperature sensorin the indoor unit(Open/Short)• Check indoor temperaturesensor connection.• Check indoor temperaturesensor’s resistance value tosee if it’s short/open.operation-off operation-off operation-off page 4-17X XError of heat exchangerIN/OUT sensor in theindoor unit(Open/Short)• Check EVA IN/OUT sensorconnection.• Check EVA IN/OUT sensor’sresistancevalue to see if it’s short/open.operation-off operation-off operation-off page 4-18X X X Error of fan motor in theindoor unit• Check the connection ofmotor connector• Check the speed of themotor fanoperation-off operation-off operation-off page 4-19X XError of the outdoortemperature sensorError of the condensortemperature sensorError of the dischargetemperature sensor• Check outdoor temperaturesensor connection.• Check outdoortemperature sensor’sresistance value to see if it’sshort/open.operation-off operation-off operation-off -X XNo communication for2 minutes betweenindoorand outdoor unit(communication errorfor more than 2minutes)• Check connection betweenindoor and outdoor unitcommunication cablesoperation-off operation-off operation-off page 4-20X Error of outdoor unit • Check error occurred withoutdoor unit. operation-off operation-off operation-off -X X Detection of thefloat switch• Check float switchconnection.• Check whether the drainhas been filled with water.operation-off operation-off operation-off page 4-21X EEPROM error • Check if there is damagewith EEPROM component. operation-off operation-off operation-off page 4-22EEPROM option error• Check the indoor modelto set the options.• Inspection for matcbetween indoor andoutdoor machine modelsoperation-off operation-off operation-off -X X MDS-kit error-.Check the wireconnection-. Check the MDS-KIT-.Check the indoor PBAoperation-on operation-on operation-on page 4-49XMiss matching errorbetween indoor unitand outdoor unit-. Check the EEPROM.-. Check the indoor unit& outdoor unit's micomversionoperation-off operation-off operation-off -: On : Blink X : Off