Samsung is known for being a good quality air conditioner brand with modern aesthetics. The sleek exterior of the Samsung AC houses a complex appliance that provides cool air to your home. You may notice your unit flashing a Samsung AC error code from time to time. These error codes indicate an internal problem in your unit that needs to be addressed.
In this article, we’ll show you the complete Samsung AC error code list, and how to read these error codes to diagnose and troubleshoot any issue affecting your Samsung AC.
List of Samsung AC Error Codes
| Code | Possible Cause |
|---|---|
| Ch | Prohibit starting during operation of the Crack case heater |
| E108 | Error due to repeated communication address |
| E121 | Error on room temperature sensor of indoor unit (Short or Open) |
| E122 | Error on EVA IN sensor of indoor unit (Short or Open) |
| E123 | Error on EVA OUT sensor of indoor unit (Short or Open) |
| E124 | Communication error sends from indoor unit |
| E128 | Indoor unit EVA IN sensor breakaway |
| E129 | Indoor unit EVA OUT sensor breakaway |
| E131 | Indoor unit heater sensor error |
| E151 | Indoor unit EEV open failure(When 2* detection) |
| E152 | Indoor unit EEV close failure(When 2“ detection) |
| E153 | Indoor unit floating S/V error(When 2“ detection) |
| E154 | Indoor unit fan error |
| E162 | Outdoor unit EEPROM error |
| E198 | Error on thermal fuse of indoor unit (Open) |
| E201 | Communication error between indoor unit and outdoor unit (Pre tracking failure or when actual number of indoor units are different from the indoor unit quantity setting on the outdoor unit) Error due to communication tracking failure after initial power supply (The error occurs with the failure regardless of the number of devices) |
| E202 | Communication error between indoor and outdoor unit (When not received in every room after completing the tracking) |
| E203 | Communication error between outdoor unit inv - main micom (For PF #4~#6 controller, error will be determined from the time when compressor turns on) |
| E221 | Error on outdoor temperature sensor (Short or Open) |
| E231 | Error on outdoor COND OUT sensor (Short or Open) |
| E241 | COND OUT sensor breakaway |
| E251 | Digital comp.1 discharge temperature sensor(Short or Open) |
| E256 | Fixed comp.1 discharge temperature sensor(Short or Open) |
| E257 | Fixed comp.2 discharge temperature sensor(Short or Open) |
| E258 | Fixed comp.3 discharge temperature sensor(Short or Open) |
| E262 | Fixed compl Discharge temperature sensor breakaway |
| E263 | Fixed comp2 Discharge temperature sensor breakaway |
| E264 | Fixed comp3 Discharge temperature sensor breakaway |
| E265 | Digital compl Sump temperature sensor breakaway. Fixed compl Sump temperature sensor breakaway |
| E267 | Fixed comp2 Sump temperature sensor breakaway |
| E268 | Fixed comp3 Sump temperature sensor breakaway |
| E269 | Suction temperature sensor breakaway |
| E271 | Comp.1 Sump temperature sensor(Short or Open) |
| E291 | High pressure sensor(Short or Open) |
| E296 | Low pressure sensor(Short or Open) |
| E307 | Oil balance sensorl (Short or Open) |
| E308 | Suction sensor(Short or Open) |
| E311 | Double pipe sensor(Short or Open) |
| E320 | Error on OLP sensor (Short or Open) |
| E403 | Compressor down due to freeze protection control |
| E404 | System stop due to overload protection control |
| E407 | Comp, down by high pressure |
| E410 | Comp, down by low pressure |
| E413 | Comp, down by the sump protection control |
| E416 | Comp, down by the discharge temperature sensor |
| E422 | Blockage detected on high pressure pipe |
| E425 | Reverse phase or open phase |
| E428 | Comp down by compression ratio control |
| E431 | Equal oil valve 1 self diagnosis |
| E440 | Heating operation restricted at outdoor temperature overheating value (default: 30 °C) |
| E441 | Cooling operation restricted at outdoor temperature below cool value (default 0°Q |
| E442 | Forbid an operation during heat mode with refrigerant charging operation when outdoor temperature is over 15°C |
| E443 | Start prohibition by refrigerant pressure error |
| E452 | Instant power off error |
| E453 | Fan motor hifi temperature error |
| E454 | Fan motor RPM error |
| E455 | Fan motor IPM high temperature error |
| E456 | Fan motor over current error |
| E457 | Fan motor reverse rotation error |
| E458 | Fan speed error |
| E461 | Error due to operation failure of inverter compressor |
| E461 | CTJow current |
| E462 | System stop due to full current control |
| E463 | System stop due to OLP temperature control |
| E464 | System stop due to DC Peak |
| E465 | Compressor overload prevention |
| E466 | DC-Link voltage under/over error |
| E467 | Error due to abnormal rotation of the compressor or unconnected wire of compressor |
| E468 | Error on current sensor (Short or Open) |
| E469 | Error on DC-Link voltage sensor (Short or Open) |
| E470 | Outdoor unit EEPROM Read/Write error (Option) |
| E471 | Outdoor unit EEPROM Read/Write error (H/W) |
| E472 | AC Line Zero Cross Signal out |
| E473 | Comp Lock error |
| E474 | Error on IPM Heat Sink sensor of inverter 1 (Short or Open) |
| E475 | Error of inverter fan 2 |
| E484 | PFC Overload (Over current) Error |
| E485 | Error on input current sensor of inverter 1 (Short or Open) |
| E500 | IPM over heat error on inverter 1 |
| E508 | Smart install is not installed |
| E554 | Gas leak detected |
| E556 | Error due to mismatching capacity of indoor and outdoor unit |
| E557 | DPM remote controller option error |
| E560 | Switch option setting error(rvot applied) |
| E590 | Inverter EEPROM Checksum error |
| E660 | Error of inverter Boot Code |
| P701 | Indoor unit floating S/V error(When 1“ detection) |
| P702 | Indoor unit EEV close failure(When 1“ detection) |
| P703 | Indoor unit EEV open failure(When 1“ detection) |
| Code | Possible Cause | Solution |
|---|---|---|
| * 1 | Indoor unit thermistor sensor error | Indoor unit thermistor sensor PCB of the Indoor unit |
| * 5 | Indoor unit pipe thermistor sensor error | Indoor unit pipe thermistor sensor PCB of the indoor unit |
| * 6 | Outdoor unit thermistor sensor error | Outdoor unit thermistor sensor PCB of the outdoor unit |
| * 9 | Float switch error | Drain pump, Float switch Drain system DIP switch (SW2) of the indoor unit (The No.2 and No.4 switches must be at “ON” position.) |
| * A | A Indoor and Outdoor communication error | Communication cables of indoor and outdoor units PCB of indoor and outdoor units |
| *C | Wired remote controller communication error | Wired remote controller cables, Wired remote controller Main/Sub PCB of the indoor unit |
| * D | Outdoor pipe thermistor sensor error | Outdoor pipe thermistor sensor PCB of the outdoor unit |
| Code | Possible Cause |
|---|---|
| E1 | Indoor unit room thermistor error |
| E5 | Indoor unit pipe thermistor error |
| E6 | Outdoor unit thermistor error |
| E9 | Float switch open error |
| EA | Communication error between indoor unit and outdoor unit |
| EC | Communication error between wired remote controller and indoor unit |
| ED | Outdoor unit pipe thermistor error |
| Reservation LED flickering(1Hz period) | Indoor temperature sensor abnormal |
| Operation LED and reservation LED flickering (1Hz period) | Indoor pipe temperature sensor abnormal |
| Operation LED and filter LED flickering (1 Hz period) | Outdoor temperature sensor abnormal |
| Reservation LED filter LED alternating flickering (1Hz period) | Float switch open abnormal |
| Reservation LED and filter LED flickering (1Hz period) | Indoor and outdoor communication abnormal |
| Operation LED and reservation LED alternating flickering (1Hz period) | Wired remote controller communication abnormal |
| Filter LED flickering (1Hz period) | Outdoor pipe temperature sensor abnormal |
Is your problem not in this list? Maybe it's a common aircon problem we've already encountered. Read more about it here.
| Code | Possible Cause | Solution |
|---|---|---|
| E1 | Short of indoor temperature sensor Open of Indoor temperature sensor |
Check of departure of indoor temperature sensor Check of PCB open/short |
| E5 | Short of indoor heat exchanger sensor Open of indoor heat exchanger sensor |
Check of indoor exchanger sensor departure Check of PCB open/short Replacement of sensor |
| E6 | Short of outdoor heat exchanger sensor Open of outdoor heat exchanger sensor |
Check of outdoor exchanger sensor departure Check of PCB open/short Replacement of sensor |
| E7 | Short of heater temperature sensor Open of heater temperature sensor |
Check of heater wiring diagram Check of sensor attachment location |
| EL | When the electrical heater is overheated | Check of heater temperature sensor departure Check of PCB open/shore Replacement of sensor |
| Error Type | LED Lamp Display | ||||
|---|---|---|---|---|---|
| Operation | Defrost | Timer | Airflow | Filter | |
| Power reset | Flickering | OFF | OFF | OFF | OFF |
| Error of temperature sensor in the indoor unit (Open/Short) | OFF | OFF | Flickering | OFF | OFF |
| Error of the outdoor temperature sensor Error of the condenser temperature sensor Error of the discharge temperature sensor |
Flickering | OFF | OFF | Flickering | OFF |
| 1. No communication for 2 minutes between indoor units (Communication error for more than 2 minutes) 2. Indoor unit receiving the communication error from outdoor unit 3. Outdoor unit tracking 3 minutes error 4. When sending the communication error from the outdoor unit, the mismatching of the communication numbers and installed numbers after completion of tracking (Communication error for more than 2 minutes) |
OFF | OFF | Flickering | Flickering | OFF |
| 1. Error of electronic expansion valve close 2. Error of electronic expansion valve open 3. 2nd detection of high temperature cond 4. 2nd detection of high temperature discharge 5. Error of reverse phase 6. Compressor down due to 6th detection of freezing |
OFF | OFF | Flickering | Flickering | Flickering |
| Detection of the float switch | OFF | OFF | OFF | Flickering | Flickering |
| Error of setting option switches for optional accessories | OFF | OFF | Flickering | OFF | Flickering |
| EEPROM option error | Flickering | Flickering | Flickering | Flickering | Flickering |
| Code | Possible Cause |
|---|---|
| 101 | Indoor unit Communication Error |
| 102 | Indoor/Outdoor unit Communication Time Out Error 60 Packet Over data |
| 201 | Indoor unit is not connected |
| 203 | Communication Error between Outdoor Main and Inverter Micom (Occurred after 1 minute detection in Main and Inverter) |
| 121 | Indoor Temp. Sensor (Open/Short Error) |
| 122 | Indoor Unit Eva in Sensor (Open/Short Error) |
| 128 | Indoor Unit Eva in Sensor Separation |
| 221 | Outdoor Temp Sensor Error (Open/Short Error) |
| 237 | CONDTemp. Sensor Error (Open/Short Error) |
| 251 | Inverter Compressor Discharge Temp, sensor Error (Open/Short Error) |
| 425 | Power cable miss connection error |
| 153 | Indoor Float Switch 2nd Detection |
| 460 | Outdoor unit - indoor unit communication wire miss connection (Connected to Power terminal) |
| 554 | Outdoor unit refrigerant full leakage (Gas leak) |
| 458 | Outdoor Fan 1 Error |
| 475 | Outdoor Fan 2 Error |
| 416 | Discharge over temperature |
| 461 | (Inverter) Compressor starting error |
| 462 | Primary Current Over Trip error |
| 464 | (Inverter) IPM Over Current(O.C) |
| 467 | (Inverter) Compressor Rotation error |
| 468 | (Inverter) Current Sensor error |
| 469 | (Inverter) DC LINK Sensor error |
| 471 | (Inverter) EEPROM Read/Write Error |
| 474 | (Inverter) Heatsink temperature over Error |
| 556 | Outdoor unit Capacity Setup option error |
| 601 | Communication error between Indoor unit and wired remote control |
| 602 | Communication error between Master and Slave wired remote control |
| 606 | COM1/COM2 Cross-installed error |
| EA | Error of setting option for wired remote control COM2 |
| Code | Possible Cause |
|---|---|
| 601 | Communication error between wired remote control < -> indoor unit/ventilation system (ERV) (When communication has stopped for 3 minutes after detecting indoor unit/ventilation system (ERV) and wired remote control) |
| 602 | Communication error between wired remote control < -> indoor unit/ventilation system (ERV) (When communication has stopped for 3 minutes after detecting indoor unit/ventilation system (ERV) and wired remote control) |
| 604 | Tracking 10 or more errors between wired remote control < -> indoor unit/ventilation system (ERV) |
| 606 | - COM1, COM2 crossing connection error - When wired remote control is connected to indoor unit COM 1 (F1,F2) terminal |
| 607 | - Multiple master error - Error occurred during installation when two wired remote controls are both set as masters in one communication line (This is not possible to detect if the communication polarity is connected in reversed polarity.) |
| 608 | Ventilation system (ERV) is not installed incase of outside gearing. |
| 609 | Indoor unit is not installed in case of outside gearing (when the indoor unit is not detected after outside gearing option setting and tracking are finished). |
| 618 | - Exceeded maximum no. of installation for indoor unit/ventilation system (ERV) (16 equipment devices) - A reset is required after checking the number of indoor unit/ventilation system (ERV) installations |
| 619 | - Mixed installation error for°C/°F indoor unit - Error occurs when mixed indoor units of °C and "F settings are installed |
| 620 | -Wired remote control °C/°F setting error -This error occurs if the indoor unit is set in °C while the wired remote control is set in °F or vice versa. |
| 621 | This error occurs when the option settings of the master and slave wired remote controls are different from each other. |
| 627 | Slave wired remote control installation error (when two slave wired remote controls are installed) |
| 630 | Normal operation option setting error (when normal operation is selected with the wired remote control for a ventilation system (ERV) that does not support the normal operation option) |
| 631 | Automatic operation option setting error (when automatic operation is selected with the wired remote control for a ventilation system (ERV) that does not support the automatic operation option) |
| 653 | Temperature sensor open/short error |
| 654 | - FRAM READ/WRITE error - Damper error [error is detected when there is no input for 100 seconds (time for about 5 revolutions) during damper output] |
| LED Display | Explanation | ||
|---|---|---|---|
| Yellow | Green | Red | |
| LED OFF | LED OFF | LED OFF | Power off/VDD NG |
| LED OFF | LED BLINK | IPM Over Current(O.C) | |
| LED OFF | LED ON | LED ON | Abnormal Serial communication |
| LED OFF | LED BLINK | LED OFF | Compressor Starting error |
| LED OFF | LED BLINK | LED ON | Normal Operation |
| LED OFF | LED ON | LED OFF | Compressor Lock error |
| LED OFF | LED ON | LED BLINK | DC-Link voltage under/over error |
| LED BLINK | LED OFF | LED BLINK | Outdoor temperature sensor error |
| LED BLINK | LED OFF | LED ON | Discharge over temperature |
| LED BLINK | LED BLINK | LED OFF | Discharge temperature sensor error |
| LED BLINK | LED BLINK | LED ON | Current sensor error |
| LED BLINK | LED ON | LED OFF | Compressor limit error |
| LED BLINK | LED ON | LED BLINK | Coil temperature sensor error |
| LED BLINK | LED ON | LED ON | Imin.Time out Communication |
| LED ON | LED OFF | LED OFF | Fan error |
| LED ON | LED OFF | LED BLINK | OTP error |
| LED ON | LED OFF | LED ON | Compressor rotation error |
| LED ON | LED BLINK | LED OFF | Operation condition secession(Dual only) |
| LED ON | LED BLINK | LED BLINK | DC-Link voltage sensor error |
| LED ON | LED BLINK | LED ON | l_Trip error / PFC Over current |
| LED ON | LED ON | LED OFF | GAS Leak error |
| LED ON | LED ON | LED BLINK | AC Line Zero Cross Signal out |
| LED ON | LED ON | LED ON | Power ON reset(l sec) |
| LED BLINK | LED OFF | LED OFF | Capacity miss match |
| LED OFF | LED BLINK | LED BLINK | Test Operation at Cooling Mode |
| LED BLINK | LED BLINK | LED BLINK | Test Operation at Heating Mode |
| Description | Lamp | Main Checking Point | ||
|---|---|---|---|---|
| Operation | Timer | Turbo | ||
| Indoor unit room temperature sensor error (open or short) | Lamp on | Lamp blink | Lamp on | 3-2P |
| Indoor unit heat exchanger temperature sensor error (open or short) | Lamp blink | Lamp blink | Lamp on | 3-3P |
| Indoor fan motor malfunction | Lamp on | Lamp on | Lamp blink | 3-4P |
| EEPROM error | Lamp blink | Lamp blink | Lamp blink | Option Setting |
| Option error (option wasn't set up or option data error) | Lamp blink | Lamp blink | Lamp blink | Option Setting |
| Outdoor unit error | Lamp blink | Lamp on | Lamp blink | Remote Control on/off Outdoor Unit Power Reset |
Also read: Samsung Mini Split Aircon Troubleshooting
Luce Aircon stands as a premier air conditioning servicing and repair company in Singapore. Our team of professional aircon technicians, with years of expertise, can proficiently manage various air conditioner models. Count on us to swiftly identify and address any issues, ensuring top-notch service for your cooling needs.
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