Samsung AC Error Codes



Samsung Indoor Unit Error Codes:

Error CodesSolutions
E121Error on indoor temperature sensor (Short or Open)
E122Error on Eva-in sensor (Short or Open)
E123Error on Eva-out sensor (Short or Open)
E126Discharge sensor error (Short or Open)
E154Indoor fan error
E221Error on outdoor temperature sensor (Short or Open)
E237Error on cond sensor
E251Error on discharge sensor
E101When there is no communication between the indoor∙outdoor units for 2 minutes
E102Communication error received from the outdoor unit
E2023 miniute tracking error on outdoor unit
E201Communication error after tracking due to unmatching number of installed units
E108Error due to repeated communication address
E109Communication address not confirmed
E151Error due to opened EEV (2nd detection)
E152Error due to closed EEV (2nd detection)
E128Eva in sensor is detached
E129Eva out sensor is detached
E198Thermal fuse error (Open)
E241
COND mid sensor is detached
E554Refrigerant leakage (2nd detection)
E450Abnomally high temperature on Cond (2nd detection)
E451
Low pressure s/w (2nd detection)
E416Abnomally high temperature on discharged air on outdoor unit (2nd detection)
E559Indoor operation stop due to unconfirmed error on outdoor unit
E425
Error due to reverse phase detection
E403Comp stop due to freeze detection (6th detection)
E301
High pressure sensor is detached
E306Low pressure sensor is detached
E428Outdoor unit copression ration error
E413Outdoor sump down_1 prevetion control
E410Compressor down due to low pressure sensor prevention control_1
E180Simultaneous opening of cooling/heating MCU SOL valve (1st detection)
E181 Simultaneous opening of cooling/heating MCU SOL valve (2nd detection)
E162EEPROM error
E163EEPROM option error

Samsung Outdoor Unit Error Codes:

Samsung Outdoor Unit Error Codes

Samsung Outdoor Unit Error Codes

The table below list the self-diagnostic routines. For some of error codes, you must contact an authorized service centre. If an error occurs during the operation, it is displayed on the outdoor unit PCB LED, both MAIN PCB and INVERTER PCB.




Error CodesSolutions
E108Error due to duplicated communication address. Check on repeated indoor unit main address.
E121Error on room temperature sensor of indoor unit (Short or Open). Indoor unit Room Thermistor Open/Short.
E122Error on EVA IN sensor of indoor unit (Short or Open). Indoor unit EVA_IN Thermistor Open/Short.
E123Error on EVA OUT sensor of indoor unit (Short or Open). Indoor unit EVA_OUT Thermistor Open/Short.
E153Error on float switch (2nd detection). Indoor unit Float Switch Open/Short Drain Pump operation Check.
E154Indoor fan error. Check on indoor unit indoor Fan operation.
E198Error on thermal fuse of indoor unit (Open). Thermal Fuse Open Check of indoor unit Terminal Block.
E201Communication error between the indoor unit and outdoor unit (Pre-tracking failure or when the 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 is supplied (The error occurs regardless of the number of units.) Check indoor quantity setting in outdoor
E202Communication error between indoor unit and outdoor unit (When there is no response from indoor units after tracking is completed) Check electrical connection and setting between indoor unit and outdoor unit.
E203Communication error between the outdoor unit and main micom (For PF #4 to #6 controllers, error will be determined from the time when the compressor is turned on.) Check electrical connection and setting between indoor unit MAIN PBA - INVERTER PBA.
E221Error on outdoor temperature sensor (Short or Open). Check Outdoor sensor Open / Short.
E231Error on outdoor COND OUT sensor (Short or Open). Check Cond-Out sensor Open / Short.
E251Error on discharge temperature sensor of compressor 1 (Short or Open). Check Discharge sensor Open / Short.
E320Error on OLP sensor (Short or Open). Check OLP sensor Open / Short.
E403Compressor down due to freeze protection control. Check Outdoor Cond.
E404System stop due to overload protection control. Check Comp. when it starts.
E416System stop due to discharge temperature.
E422Blockage detected on high pressure pipe.
E425Reverse phase or open phase. Check whether 3 phase is reversed or opened.
E440Heating operation restricted at outdoor temperature over Theat_high value.
E441Cooling operation restricted at outdoor temperature below Tcool_low value.
E458Fan speed error.
E461Error due to operation failure of inverter compressor.
E462System stop due to full current control.
E463Over current trip / PFC over current error. Check OLP sensor.
E464IPM Over Current (O.C)
E465Comp. Over load error.
E466DC-Link voltage under/over error. Check AC Power and DC Link Voltage.
E467 Error due to abnormal rotation of the compressor or unconnected wire of compressor. Check Comp wire.
E468Error on current sensor (Short or Open). Check Outdoor Inverter PBA.
E469Error on DC-Link voltage sensor (Short or Open)
E470 Outdoor unit EEPROM Read/Write error (Option). Check Outdoor EEPROM Data.
E471 Outdoor unit EEPROM Read/Write error (H/W). Check Outdoor EEPROM PBA.
E472AC Line Zero Cross Signal out.
E473Comp Lock error.
E474Error on IPM Heat Sink sensor of inverter 1 (Short or Open). Check Outdoor Inverter PBA.
E475Error on inverter fan 2.
E484PFC Overload (Over current) Error. Check Outdoor Inverter PBA.
E485Error on input current sensor of inverter 1 (Short or Open). Check Outdoor EEPROM PBA.
E500IPM over heat error on inverter 1. Check Outdoor Inverter PBA.
E508Smart install is not installed.
E554 Gas leak detected. Check the refrigerant.
E556Error due to mismatching capacity of indoor and outdoor unit. Check the indoor and outdoor unit capacity.
E590Inverter EEPROM Checksum error.
E660Inverter Boot Code error.

Samsung Wired Remote Controller Error Codes:

Samsung Wired Remote Controller Error Codes

Samsung Wired Remote Controller Error Codes

If an error occurs, (test) icon will be displayed on the wired remote controller. Press the Test button to see the error code.

Error CodesMeaning
101Indoor unit communication error. Check the communication cable of indoor unit. Check the DC output voltage at the communication terminal.
102Communication Error between indoor and outdoor unit.
108Duplicated addresssetting error. Check addresssetting of Indoor units.
109No response error addressfrom indoor unit. Check indoor unit's quantity setting in outdoor unit. Check electriacl connection and setting.
121Indoor temperature sensor (open/short error). Check indoor unit room temperature sensor. Check indoor unit PCB connector CN41. (White)
122Indoor unit Eva In sensor (Open/Short) Check indoor unit pipe sensor. Check indoor PCB connector CN41.(White)
153Indoor floating switch secondary detection. Check indoor unit floatsensor. Check indoor PCB connector CN5. (black)
202Indoor/outdoor communication error (1 min). Check the communication connection between indoor and outdoor units. Check the power line and communication cable connection status
203Communication error between indoor/outdoor INV-MAIN MICOM (1 min). Check MAIN MICOM . Check INVERTER MICOM.
221Outdoor temperature sensor error. Check sensor connection status. Check sensor location. Check sensor resistance.
231COND temperature sensor error. Check sensor connection status. Check sensor location. Check sensor resistance.
251[Inverter] Emission temperature sensor error. Check sensor connection status. Check sensor location. Check sensor resistance.
403Detection of Indoor Freezing (when Comp. Stops). Check whether the indoor unit air intake is blocked. Check the operation of the indoor fan.
404Protection of Outdoor Overload (when Comp. Stops). Check sensor connection status. Check sensor location. Check sensor resistance.
416Emission temperature excessively high. No error. (DISCHARGE temperature control).
422High pressure blockage error (Refrigerant completely Leakage error). Check whether the outdoor unitservice valve is open. Check the connection of the pipes. Check the operation of the EEV. Check for refrigerant leakage. (Completely leakage).
440Heating operation blocked. Check the operation setting state. Check temperature sensor.
441Cooling operation blocked. Check the operation setting state . Check temperature senso.
458Outdoor fan 1 error. Check input power connection status. Check the connection status between the motor and outdoor unit PCB. Check indoor/outdoor fuse.
461[Inverter] Compressorstartup error. Check the compressor connection status. Check the resistance between difference phases of the compressor.
462[Inverter] Total current error/ PFC over current error. Check the input power. Check the coolant charging status. Check the normal operation of outdoor fan.
463OLP Overheat and Comp. Stop. Reconfirm the opening of the service valve. Check for leaksfrom the connection part of the pipe and product or from the pipe joint. Change the outdoor unit location and direction. Refill the coolant after checking the leaking part. Reinstall the outdoor unitset.
464[Inverter] IPM over current error. Check coolant charging Check the compressor connection status and normal operation Check the obstacles around the indoor and outdoor units Check whether the outdoor unitservice valve is open Check whether the indoor/outdoor installation pipe/ wiring are correct
465Compressor V limit error. Check the compressor connection status Check the resistance between difference phases of the compressor
466DC LINK over/low voltage error. Check input power. Check AC power connection.
467[Inverter] Compressor rotation error. Check the compressor connection status. Check the resistance between difference phases of the compressor.
468[Inverter] Current sensor error. Check EEPROM DATA. Check the normal operation of PCB.
469[Inverter] DC LINK voltage sensor error. Check the input power connection. Check the status of RY21 and R200 in the INVERTER PCB.
470EEPROM Read/Write error.
471[Inverter] OTP error. Check EEPROM DATA. Check the normal operation of PCB.
472AC ZERO CROSSING SIGNAL OUT error. Check the input power status.
473Compressor LOCK error. Check the compressor connection status. Check the resistance between difference phases of the compressor.
475Outdoor fan 2 error. Check the input power connection status. Check the connection status of the motor and the outdoor unit PCB. Check the indoor/outdoor unit fuse.
500IPM Overheat Error for Outdoor Unit Inverter Comp. Change the location of the outdoor unit if the temperature is abnormally high when the heatproof plate is checked.
554Gas leak error. Check the coolant charging status. Check the indoor EVA sensor. Check if the outdoor unit service value is open. Check that the indoor/outdoor installation pipe/wiring are correct.
556Capacities not matched. Check the option code of the indoor unit.
601Communication error between the indoor unit and wired remote controller. Check the connection wire between the indoor unit and the wired remote controller.
602Communication error between the Master and Slave wired remote controllers. Check the option switch for defining the Master and Slave (only one Master and one Slave can exist)
606COM1/COM2 crossinstallation error. Check that wired remote controller is connected to the COM2 terminal of the indoor unit
EAWired remote controller COM2 option setting error. Check that Com1, Com2 setting DIP switch isset to Com2.

Samsung Multi AC Error Codes:

Samsung Multi AC Error Codes

Samsung Multi AC Error Codes

The table below give indication about self diagnostic routine. Some of error code requires activities exclusively for Authorise Service Center.

Fault CodesProblems
E101Communiaction error(indoor unable to receive data)
E102Outdoor unit communication error(Abnormal data from indoor unit over 60 packet)
E121Indoor unit room temperature sensor error (Open/Short)
E122Indoor unit heat exchanger in temperature sensor error (Open/Short)
E123Indoor unit heat exchanger out temperature sensor error (Open/Short)
E128Indoor unit sensor error-Evaporator pipe in sensor - Self diagnosis
E129Indoor unit sensor error-Evaporator pipe out sensor - Self diagnosis
E154Indoor Unit FAN Error
E161More than two indoor units cool and heat simultaneously
E162Indoor Unit EEPROM Error
E163Indoor Unit EEPROM Option Error
E171EVA-MID BREAK AWAY
E172EVA-IN BREAK AWAY
E173EVA-OUT BREAK AWAY
E190Failure of pipe check operation. Check piping connection and setting
E199No pipe check operation check - occasion : try to operation after the installation through auto addressing mode without pipe check operation. Check setting
E201The number of Indoor unit mismatched. Check electrical connection and setting
E202Communication error between the outdoor and indoor unit. Check electrical connection and setting
E203Outdoor communication error between main micom and inverter micom
E206Outdoor communication error beween main micom and hub micom
E221Outside temperature sensor error(Short/Open) - Error level: over 4.9V(-50°C) under 0.4V(93°C)
E237Condenser temperature sensor error(Short/Open) - Error level: over 4.9V(-50°C) under 0.4V(93°C)
E246Outdoor unit sensor error - Condenser out sensor(Short/Open) - Self diagnosis
E251Compressor Discharge temperature sensor error
E261Compressor discharge sensor detached - Self diagnosis
E320Compressor OLP sensor error (Short/Open) - Error condition : outdoor temperature under -20°C - Error level : over 4.95V(-30°C) under 0.5V(151°C)
E330EvaIn1 Sensor Short/Open
E331EvaIn2 Sensor Short/Open
E332EvaIn3 Sensor Short/Open
E333EvaIn4 Sensor Short/Open
E334EvaIn5 Sensor Short/Open
E335EvaOut1 Sensor Short/Open
E336EvaOut2 Sensor Short/Open
E337EvaOut3 Sensor Short/Open
E338EvaOut4 Sensor Short/Open
E339EvaOut5 Sensor Short/Open
E401Outdoor unit freezing(Compressor stop). Check pipe lenght, indoor unit filter, refrigerant leakage/charge and service port
E404Outdoor unit overload - Safety control (Compressor stop). Check pipe lenght, refrigerant leakage/charge
E416Outdoor unit high discharge temperature - Safety control (Compressor stop). Check pipe lenght, refrigerant leakage/charge
E419Outdoor unit EEV open (Stopped indoor unit’s) -Self diagnosis
E422Outdoor unit EEV open (operating indoor unit’s) -Self diagnosis
E440High temperature(over 30°C) of outdoor as heating mode
E441Low temperature(under -10°C) of outdoor as cooling mode
E458Outdoor Fan Error
E460Communication cable mismatched between indoor and outdoor unit. Check electrical connection
E461Inverter compressor starting failure (5 times)
E462Compressor trip by input current control mode (PFC over current)
E463Compressor trip by OLP temperature control mode
E464Over current
E465Compressor Vlimit Error
E466DC link Voltage error (under 150V, over 410V)
E467Abnormal compressor running (Compressor Rotation Error)
E468Current sensor error
E469DC link Voltage sensor error
E470Outdoor unit EEPROM Error
E472Inverter micom zero-crossing error
E483Over voltage Error

Samsung AC Display Error and Check Method:

If you turn off the air conditioner when the LED is flickering, the LED is also turned off.

Abnormal conditionsLED lamp display-OperationLED lamp display-DefrostLED lamp display-TimerLED lamp display-Filter
Power resetFlickeringOffOffOff
Error of temperature sensor in the indoor unit (Open/Short)OffFlickeringFlickeringFlickering
Error of heat exchanger sensor in the indoor unit (Open/Short)FlickeringFlickeringOffOff
Error of fan motor in the indoor unitOffOffFlickeringOff
Error of the outdoor temperature sensor. Error of the condensor temperature sensor. Error of the discharge temperature sensor.FlickeringOffFlickeringOff
No communication for 2 minutes between indoor and outdoor unit (communication error for more than 2minutes)OffFlickeringFlickeringOff
Error of outdoor unitOffFlickeringFlickeringFlickering
Detection of the float switchOffOffFlickeringFlickering
EEPROM errorFlickeringFlickeringFlickeringOff
EEPROM option error
FlickeringFlickeringFlickeringFlickering
Motion detect sensor errorFlickeringOffOffFlickering
Mixed operation errorOffOffOffFlickering

Error Mode Display of Outdoor Unit Board:

Samsung AC Error Mode Display of Outdoor Unit Board

Samsung AC Error Mode Display of Outdoor Unit Board

LAMP of Display Monitor




Yellow GrenRedDescription
Lamp offLamp offLamp offPower Off / VDD NG
Lamp offLamp offLamp flickeringComp. Peak Current (O.C.)
Lamp offLamp offLamp onCommunication NG
Lamp offLamp flickeringLamp offComp. Starting error
Lamp offLamp flickeringLamp flickeringHeatsink sensor error
Lamp offLamp flickeringLamp onNormal Operation
Lamp offLamp onLamp flickeringDC-Iink overvoltage error
Lamp offLamp onLamp on4-Way valve error
Lamp flickeringLamp offLamp offHeatsink Temp. trip
Lamp flickeringLamp offLamp flickeringOutdoor Sensor error(Open/Short)
Lamp flickeringLamp offLamp onDischarge sensor temp. trip
Lamp flickeringLamp flickeringLamp offDischarge sensor error(Open/Short)
Lamp flickeringLamp flickeringLamp flickeringOLP sensor error(Open/Short)
Lamp flickeringLamp flickeringLamp onCT sensor error
Lamp flickeringLamp onLamp offUnit Over Current protection
Lamp flickeringLamp onLamp flickeringDeice sensor error(Open/Short)
Lamp flickeringLamp onLamp onOLP sensor temp. trip
Lamp onLamp offLamp flickeringOPTION error (EEPROM)
Lamp onLamp offLamp onCompressor rotation error
Lamp onLamp flickeringLamp offDC fan error (SH12BWHX only)
Lamp onLamp flickeringLamp flickeringDC-Link voltage sensor error
Lamp onLamp flickeringLamp onPFC OC error
Lamp onLamp onLamp offNO GAS error
Lamp onLamp onLamp flickeringAC Line zero-crossing error

Samsung AC Troubleshooting

Samsung AC Troubleshooting

Samsung AC Troubleshooting

Refer to the following chart if the air conditioner operates abnormally. This may save time and unnecessary expenses.

TroubleSolution
The air conditioner does not work at all.Check powerstatus and then operate the air conditioner again.
Plug in orswitch on the circuit breaker and then operate the air conditioner again.
Check if you have set theOffTimer.Operate the air conditioner again by pressing the Power button.
The temperature adjustment is not working.Check if you have selected Fan/Turbo mode. In these modes, desired temperature is set to auto and you cannot adjust the temperature.
Cool/Warm air does not come out of the air conditionerCheck if the set temperature is higher(during Cool mode)/ lower(during Heat mode) than the current temperature. Pressthe Temp + or - button on the remote controller to change the set temperature.
Check if the Air filter is blocked by dirt. If there is a lot of dust on the Air filter, cooling(heating) performance may decrease. Clean them frequently.
Check if the outdoor unit is covered or installed near the obstacle. Take the cover off and take the obstacle away.
If you want to operate the air conditioner in the sunlight, cover the outdoor unit using curtains or etc.
Check if the air conditioner is operating in De-ice mode.When the ice formed in winter or the outdoor temperature is too low, the air conditioner operates in De-ice mode automatically. In De-ice mode, indoor fan stops and cool air does not come out.
If the doors or windows are open, it may cause bad cooling (heating) performance. Close the doors and windows.
Check if the air conditioner has just been turned on afterstopping cooling(heating) operation. In this case, just a fan will run to protect the outdoor unit compressor.
Check if the pipe length istoo long. When the pipe length exceeds maximum allowable pipe length, cooling (heating) performance may decrease.
Remote controller is not working.Check if your batteries are depleted.
Make sure nothing is blocking your remote controllersensor.
Check that there are strong lighting apparatus near the air conditioner. Strong light which comes from fluorescent bulbs or neon signs may interrupt the electric waves.
Timer function does not set.Check if you press the Set button on the remote controller after you have set the time.
The indicator is blinking continuously.Pressthe Power button or disconnect the power plug/switch off the auxiliary power switch. If the indicator is still blinking, contact the service center.
Odors permeate in the room during operation.Check if the appliance is running in a smoky area. Ventilate the room or operate the air conditioner in Fan mode for 1~2 hours. (We do not use smelly componentsin the air conditioner.)
Error is indicated.When an indoor unit indicator blinks, contact the nearest service center.
Noise is generated.Depending on the status of the air conditioner usage, noise can be heard when refrigerant flow movement changes. It is normal.
Smoke is generated from the outdoor unit.If may not be a fire but it can be a steam generated by the defrost operation from outdoor heat exchanger during Heat mode in winter.
Water is dropping from the outdoor unit piping connection.Water may be generated because of the temperature difference. It is normal.

Samsung AC Manual PDF

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