Samsung AC Error Codes and Troubleshooting

AC BrandsSamsung
Error CodeCause
E101Communication Error (Indoor Outdoor)
E102Communication Error (Indoor Outdoor)
E121ROOM TH sensor error
E122INDOOR MID, INDOOR IN PIPE-TH sensor error
E154Fan Error (Indoor)
E162EEPROM Error (Indoor)
E163Option Error
E203Time out Comm. (Inv Micom Main Micom)
E221OUT-TH(Outdoor Temperature) Sensor Error
E231CON-TH(Cond Temperature) Sensor Error
E251DIS-TH(Discharge Temperature) Sensor Error
E416DIS-TH(Discharge Temperature) Over Error
E422EEV or Valve Close error-Self diagnosis
E440Prohibit Operation Condition Error (Heating)
E441Prohibit Operation Condition Error (Cooling)
E458Fan Error(Outdoor)
E461Comp Starting Error
E462AC Input I_Limit Trip Error
E464IPM Over Current(O.C) Error

Samsung Multi System AC Error Codes

Indoor Unit Error mode and check method;

Display: E1 ↔ 01

Explanation: Communication error (unable to receive data)

Main checking Point/Remark: Communication cable connection

Display: E1 ↔ 02

Explanation: Communication error (outdoor cannot communicate)

Main checking Point/Remark: Another indoor unit or indoor PCB

Display: E1 ↔ 21

Explanation: Indoor unit room temperature sensor error (Open/Short)

Main checking Point/Remark: Room temperature sensor, indoor PCB

Display: E1 ↔ 22

Explanation: Indoor unit heat exchanger in temperature sensor error (Open/Short)

Main checking Point/Remark: Heat exchanger in sensor, indoor PCB

Display: E1 ↔ 23

Explanation: Indoor unit heat exchanger out temperature sensor error (Open/Short)

Main checking Point/Remark: Heat exchanger out sensor, indoor PCB

Display: E1 ↔ 28

Explanation: Indoor unit heat exchanger in temperature sensor detached

Main checking Point/Remark: Heat exchanger in sensor

Display: E1 ↔ 029

Explanation: Indoor unit heat exchanger out temperature sensor detached

Main checking Point/Remark: Heat exchanger out sensor

Display: E1 ↔ 30

Explanation: Indoor unit heat exchanger in & out temperature sensor detached

Main checking Point/Remark: Heat exchanger in & out sensor

Display: E1 ↔ 54

Explanation: Indoor unit fan motor malfunction

Main checking Point/Remark: Fan motor and cable

Display: E1 ↔ 61

Explanation: More than 2 indoor units cool and heat simultaneously

Main checking Point/Remark: Another indoor unit operation mode

Display: E1 ↔ 62

Explanation: EEPROM error

Main checking Point/Remark: Indoor PCB

Display: E1 ↔ 63

Explanation: Option code setting error

Main checking Point/Remark: Option code

Display: E1 ↔ 85

Explanation: Cable miss-wiring

Main checking Point/Remark: Cable connection (Indoor & Outdoor unit)

Display: E2 ↔ 01

Explanation: The number of indoor unit mismatched

Main checking Point/Remark: Cable connection (another indoor unit & outdoor unit), SW01(outdoor)

Display: E2 ↔ 51

Explanation: Compressor discharge sensor error(Short/Open)

Main checking Point/Remark:  Outdoor unit

Display: E5 ↔ 59

Explanation: Outdoor unit error

Main checking Point/Remark: Outdoor unit (Error code)

The error indicated on the LED display of Indoor unit;

Samsung error indicated on the LED display of Indoor unit;

Outdoor Unit Error mode and check method;

Display: E1 ↔ 01

Explanation: Communication error (indoor unable to receive data)

Main checking Point: Communication cable connection

Display: E1 ↔ 02

Explanation: Communication error (outdoor unable to communicate)

Main checking Point: Indoor unit

Display: E1 ↔ 21

Explanation: Indoor unit room temperature sensor error (Open/Short)

Main checking Point: Indoor unit

Display: E1 ↔ 22

Explanation: Indoor unit heat exchanger in temperature sensor error (Open/Short)

Main checking Point: Indoor unit

Display: E1 ↔ 23

Explanation: Indoor unit heat exchanger out temperature sensor error (Open/Short)

Main checking Point:  Indoor unit

Display: E1 ↔ 28

Explanation: Indoor unit sensor error – Evaporator pipe in sensor detached

Main checking Point: Indoor unit

Display: E1 ↔ 29

Explanation: Indoor unit sensor error – Evaporator pipe out sensor detached

Main checking Point: Indoor unit

Display: E1 ↔ 30

Explanation: Indoor unit heat exchanger in & out temperature sensor detached

Main checking Point: Indoor unit

Display: E1 ↔ 61

Explanation: More than 2 indoor units cool and heat simultaneously

Main checking Point: Indoor unit operation mode

Display: E2 ↔ 01

Explanation: The number of indoor unit mismatched

Main checking Point: Communication wiring

Display: E2 ↔ 02

Explanation: Communication error (outdoor unable to receive data)

Main checking Point: Communication wiring

Display: E2 ↔ 03

Explanation: Communication error between 2 microcontroller on the outdoor PCB

Main checking Point: Outdoor unit PCB

Display: E2 ↔ 37

Explanation: Condenser temperature sensor error (Short/Open)

Main checking Point: Temperature sensor

Display: E2 ↔  46

Explanation: Condenser temperature sensor detached

Main checking Point:  Temperature sensor

Display: E2 ↔  60

Explanation: Compressor discharge sensor error (Short/Open)

Main checking Point:  Temperature sensor

Display: E2 ↔  61

Explanation: Compressor discharge sensor detached

Main checking Point:  Temperature sensor

Display: E3 ↔  20

Explanation: Compressor OLP sensor error (Short/Open)

Main checking Point:  Temperature sensor

Display: E4 ↔  01

Explanation: Indoor unit heat exchanger freezing and compressor stop (cooling mode)

Main checking Point: Check pipe matching also (indoor-outdoor)

Display: E4 ↔ 03

Explanation: Outdoor unit overload and compressor stop (protection control in heating mode)

Main checking Point: Check pipe matching also (indoor-outdoor)

Display: E4 ↔ 16

Explanation: Outdoor unit high discharge temperature and compressor stop

Main checking Point: Check pipe matching (indoor-outdoor)

Display: E4 ↔ 19  

Explanation: Outdoor unit EEV open error (self diagnosis)

Main checking Point:  EEV

Display: E4 ↔  22

Explanation: Outdoor unit EEV close error (self diagnosis)

Main checking Point: EEV

Display: E4 ↔  40

Explanation: High temperature (over 30˚C) of outdoor as heating mode

Main checking Point: Operation mode

Display: E4 ↔  41

Explanation: Low temperature (under -5˚C) of indoor as cooling mode

Main checking Point: Operation mode

Display: E4 ↔  60

Explanation: Wrong connection between communication and power cable

Main checking Point: Wiring indoor and outdoor

Display: E4 ↔  61

Explanation: Inverter Compressor starting failure (5 times)

Main checking Point: Service valve, EEV, Compressor terminal, Compressor wire, Outdoor controller

Display: E4 ↔  62

Explanation: Compressor trip by input current limit control

Main checking Point: EEV, Gas over charge, Outdoor controller

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