Troubleshooting42Samsung Electronics4-3-3 What to check before diagnosis4-3-3-1 Lamp combination expression method display (cassette type indoor unit)- Global 4way cassette type■ Error detection and restart● When error occurs during operation, indicate a problem with LED flashes, and no other operations but LED stops.● When restarting operation with remote controller or switch, it will determine the appropriate error mode after normal operation.■ LED lamp display with error detectionAbnormal condition ErrorcodeLED DisplayOperation Defrost Timer FilterError on indoor temperature sensor (Short or Open) E1211. Error on Eva-in sensor (Short or Open)2. Error on Eva-out sensor (Short or Open)3. Discharge sensor error (Short or Open)E122E123E126Indoor fan error E1541. Error on outdoor temperature sensor (Short or Open)2. Error on cond sensor3. Error on discharge sensorOther outdoor unit sensor error that is not on the above listE221E237E2511. When there is no communication between the indoor∙outdoorunits for 2 minutes2. Communication error received from the outdoor unit3. 3 miniute tracking error on outdoor unit4. Communication error after tracking due to unmatching number ofinstalled units5. Error due to repeated communication address6. Communication address not confirmedOther outdoor unit communication error that is not on the above listE101E102E202E201E108E109Self diagnosis error display1. Error due to opened EEV (2nd detection)2. Error due to closed EEV (2nd detection)3. Eva in sensor is detached4. Eva out sensor is detached5. Thermal fuse error (Open)E151E152E128E129E1981. COND mid sensor is detached.2. Refrigerant leakage (2nd detection)3. Abnomally high temperature on Cond (2nd detection)4. Low pressure s/w (2nd detection)5. Abnomally high temperature on discharged air on outdoor unit(2nd detection)6. Indoor operation stop due to unconfirmed error on outdoor unit7. Error due to reverse phase detection8. Comp stop due to freeze detection (6th detection)9. High pressure sensor is detached10. Low pressure sensor is detached11. Outdoor unit copression ration error12. Outdoor sump down_1 prevetion control13. Compressor down due to low pressure sensor prevention control_114. Simultaneous opening of cooling/heating MCU SOL valve (1st detection)15. Simultaneous opening of cooling/heating MCU SOL valve (2nd detection)Other outdoor unit self-diagnosis error that is not on the above listE241E554E450E451E416E559E425E403E301E306E428E413E410E180E181Flowating s/w (2nd detection) E153EEPROM error E162
