This page contains a list of all the Samsung air conditioner malfunction problem codes and their potential causes. You can determine the state and problem with the air conditioner or air conditioning system by searching up the error code. There are fault codes for both indoor and outdoor Samsung air conditioners.
Samsung Air Conditioner Indoor Unit 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) |
These are the common issues for Samsung Air Conditioners
| 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 |
| 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 |
| 604 | Tracking 10 or more errors between wired remote control < -> indoor unit/ventilation system (ERV) |
| EA | Error of setting option for wired remote control COM2 |
| Code | Possible Cause |
|---|---|
| 606 | COM1/COM2 Cross-installed error |
| 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] |
Common Issues with the Samsung Mini Split Air Conditioners
| Problem | Possible Causes | Solutions |
|---|---|---|
| Air Conditioner and Remote Control Miscommunication | Dead batteries; Obstructed communications | Replace batteries; Direct the remote to the unit |
| Air Conditioner Won’t Turn On | Power supply issues | Inspect the breaker box; Contact an electrician |
| Air Conditioner is Not Blowing Cold Air | System set to FAN mode; AC unit is clogged, or has a faulty component | Set AC to COOL; Clean and repair the unit |
| Fan Speed Won’t Change | AC is on AUTO or DRY mode; Remote control buttons are locked | Switch to COOL or FAN mode; Unlock control buttons |
The Air Conditioner and the Remote Control are not Communicating
There can be a communication issue between your Samsung air conditioner and the control board if you are using the remote control and nothing is happening with your air conditioner. When your indoor unit operates differently from what you selected using the remote control, miscommunications might also occur.
Mini split kinds frequently have communication problems between the remote control and the air conditioner. This might be an indication that the remote control batteries are getting low, or it can be the result of a blocked remote control sensor.
To fix this, just swap out the batteries in your Samsung AC remote control and see if it resolves the problem. To ensure a straight communication line between the remote control sensor and your Samsung air conditioning interior unit, make sure the sensor is aimed directly at the indoor unit and that there are no walls or other obstructions in the way.
My air conditioner will not turn on
Verify the power source for both your interior and outdoor units if the air conditioner won’t turn on at all. Frequently, inadequate electrical supply to power your air conditioner is the result of a circuit breaker box malfunction, which is the reason why the issue continues.
Examine the fuse that connects your Samsung split system, and note whether any other devices that are linked to the same fuse are experiencing the same issue. You have an electrical problem if the same issue occurs with additional gadgets. Before you can get your air conditioner operating normally once more, you will need to get in touch with an electrician to address electrical problems.
My air conditioner is not blowing cold air
First, make sure that the cool mode rather than the fan option is selected on your Samsung split system. A frozen air conditioner, filthy condenser, or blocked interior unit might be the cause of your air conditioner’s inability to chill the room even when it is set to cool mode.
The first step in fixing the issue is cleaning your air conditioner. Examine your air conditioner’s housing by opening it and looking for any filthy or frozen filters. After letting the ice melt, clean the filters as necessary.
The speed of the aircon fan stays the same
The remote control on the Samsung micro split air conditioner allows you to adjust the fan speed. You most likely have your air conditioner on AUTO or DRY mode, which automatically adjusts the fan speed based on the temperature and humidity in the space, if you press the buttons on the remote and the fan speed does not change.
You may adjust the fan speed as needed by turning your air conditioner on COOL or FAN modes. whether the issue still doesn’t go away, see whether the batteries in your remote control are dead or if the control board and the air conditioner aren’t communicating properly. If so, go to the first step.
Air Conditioner Brand Error Codes
Click on the brand below for their air conditioner error codes and faults.