Samsung air conditioners error codes

The modern Samsung air conditioners have a very developed self-diagnostics system, and when the control system detects an error, it blocks the operation of the entire device and displays a cause of faulty condition.

The control system of the SAMSUNG air conditioners reports that an error occurred by blinking of a light-emitting diode on the surface of the internal (or external) unit. When a particular error of an air conditioner is detected, light-emitting diodes blink in a certain order, which corresponds with a particular error. If the control system of an air conditioner detects more than one error, the error with the highest priority is displayed first and then all the following errors are displayed.

Samsung air conditioners  error codes Outdoor Unit

SUB PCB
7-Segment
Diplay
ContentMeasuresNumber of TimesOutdoor unit
compressor/
outdoor unit fan
E 101Indoor unit communication
error(1min.)
• Check the communication line for indoor units
• Check the power supply of the communication phase (DC)
1 TimeOperation-off
E 102Communication time-out
error(2min.)
1 Time
E 121Indoor temperature sensor• Check the temp. sensor of the indoor unit room
• Check the indoor PCB connector
1 Time
E 122Indoor unit EVA IN sensor• Check the indoor unit drainage pipe sensor
• Check the indoor PCB connector
1 Time
E 123Indoor unit EVA OUT sensor1 Time
E 128Dismount of indoor unit
EVA IN sensor
• Check the drainage pipe has been dismounted1 Time
E 129Dismount of indoor unit
EVA OUT sensor
1 TimeOperation-off
E 153Secondary detection of indoor
floating switch
• Check the indoor unit's float sensor
• Check the indoor PCB connector
1 Time
E 154Indoor fan error• Check the indoor PCB connector1 Time
E 162Indoor eeprom error• Check the EEPROM data
• Check the indoor's option
1 Time
E 163Indoor eeprom option error1 Time
E 201Indoor unit not connected• Check the indoor unit connection
• Check the indoor unit number (multi only)
1 Time
E 2021min. Time out Comm.
(Display Board : Onboard :
Indoor ↔ Outdoor)
• Check the indoor unit connection
• Check the indoor unit option
1 Time
E 203Abnormal Serial
communication(Display Board:
Indoor ↔ Outdoor)
---
E 221Outdoor temp sensor error
(Dual/Single)
• Check the connection status of the sensor
• Check the sensor location
• Check the risistance values of sensor
1 TimeOperation-off
E 237Cond temp sensor error
(Dual/Single)
1 Time
E 251Discharge temp sensor error
(Dual/Single)
1 Time
E 416Discharge over temperature
(Dual/Single)
-3 Times
E 440Operation condition
secession(HEATING)
• Check the operation status of operation mode
• Check the temp. sensor
1 Time
E 441Operation condition
secession(COOLING)
1 Time
E 458Fan error• Check the input power connection status
• Check the connection status between the motor and PCB in outdoor unit
• Check the fuse of indoor/outdoor units
1 Time
E 461Comp Starting error• Check the connection status of the compressor
• Check the resistand between different phases in compressor
5 Time
E 462I_Trip error / PFC Over current• Check the input power
• Check the refrigerant is filled
• Check the outdoor fan operation normally
3 TimeO#rowspan#
E 464IPM Over Current(O.C)• Check the refrigerant is filled
• Check the connection status of compressor and if it operates normally
• Check for any obstacles around indoor/outdoor units
9 Time
E 465Comp Vlimit error• Check the connection status of compressor
• Check the resistance between different phases in compressor
9 Times
E 466DC-Link voltage under/
over error
• Check the connection of input power-Restart(after 3min.)
E 467Comp rotation error• Check the connection status of the compressor
• Check the resistance between different phases in compressor
3 TimesOperation-off
E 468Current sensor error• Check the PCB operates normally1 Times
E 469DC-Link valtage sensor error• Check the connection of input power1 Times
E 471OTP error• Check the PCB operates normally1 Times
E 472AC Line Zero Cross Signal out• Check the connection of input power1 Times
E 473Comp Lock error• Check the connection status of the compressor
• Check the resistance between different phases in compressor
3 Times
E 475Fan error(two fan outdoor• Check the input power connection status
• Check the connection status between the motor and PCB in outdoor unit
• Check the fuse of indoor/outdoor units
1 Times
E 554GAS Leak error(Dual/Single)• Check refrigerant is filled
• Check the indoor EVA sensor
3 Times
E 556Capacity miss match• Check the indoor unit's option code
• Check the capacity of indoor unit's and outdoor unit's
1 Times

Wired remote controller(Option resource)
– If an error occurs is displayed on the wired remote controller.
– To see an error code, please press the test button.

Error modeContent MeasuresProduct operation
status in case of error
Outdoor unit compressor/
outdoor unit fan
Error type
101Indoor unit communication errorCheck the communication line for indoor
units, check the power supply of the
communication phase (DC)
Operation-offCommunication
error
102Communication time-out error
between indoor/outdoor unit
6-packet over error
Check the communication line for indoor
units, check the power supply of the
communication phase (DC)
121Indoor temperature sensor
(open/short error)
Check the temp. sensor of the indoor unit
room. Check the indoor PCB connector
CN21(white)
Operation-offIndoor sensor
error
122Indoor unit Eva In sensor
(open/short)
Check the indoor unit drainage pipe sensor
Check the indoor PCB connector CN21
(white)
128Dismount of indoor unit Eva In
sensor
Check the drainage pipe has been
dismounted
Operation-offIndoor sensor
error
153Secondary detection of indoor
floating switch
Check the indoor unit’s float sensor
Check the indoor PCB connector CN51
(black)
Self-diagnosis
error
201Indoor unit not connectedCheck the indoor unit connection
Check the indoor unit option
Communication
error
203Communication error between
indoor/outdoor unit INV and Main
Micom (1 min.)
Check the Main MICOM
Check the inverter MICOM
-Communication
error
221Outdoor temperature sensor errorCheck the connection status of the sensor
Check the sensor location
Check the resistance values of sensor
Operation-offOutdoor sensor
error
237Cond. temperature sensor errorCheck the connection status of the sensor
Check the sensor location
Check the resistance values of sensor
251[inverter] Emission temperature
sensor error
Check the connection status of the sensor
Check the sensor location
Check the resistance values of sensor
416Excessive temperature emissionNot an error (discharge temp. control)-Outdoor unit
protection control
error
425Power cable connection errorCheck the status of power connection Operation-offOutdoor sensor
error
450Non-connection error of indoor
and outdoor Communication wire
(connected to the power terminal)
Check the status of power connection
Check the connection status of the
communication line
Operation-offSelf-diagnosis
error
458Outdoor fan 1 errorCheck the input power connection status
Check the connection status between the
motor and PCB in outdoor unit
Check the fuse of indoor/outdoor units
461[inverter] Compressor operation
error
Check the connection status of the compressor
Check the resistance between different
phases in compressor
Operation-offOutdoor unit
protection control
error
462Discharge current error/
PFC over-current error
Check the input power
Check refrigerant is filled
Check outdoor fan operates normally
464[inverter] IPM over current errorCheck refrigerant is filled
Check the connection status of compressor
and if it operates normally
Check for any obstacles around indoor/
outdoor units
Operation-offOutdoor unit
protection control
error
467[inverter] Compressor rotation
error
Check the connection status of the
compressor
Check the resistance between different
phases in compressor
468[inverter] Current sensor errorCheck PCB operates normally
469[inverter] DC link voltage sensor
error
Check the connection of input power
Check the status of RY21 and R2000 of
Inverter PCB
416[inverter] OTP errorCheck PCB operates normallyOperation-offOutdoor unit
protection control
error
475Outdoor fan 2 errorCheck the connection status of input power
Check the connection status of motor and
outdoor PCB
Check the fuse of indoor/outdoor unit
Self-diagnosis
error
554Gas leakage errorCheck refrigerant is filled
Check the indoor EVA sensor
556Inconsistent volume Check the indoor unit’s option codeOutdoor unit
protection control
error
601Communication error between
indoor unit and wired remote
controller
Check the connection wire linking indoor
unit and wired remote controller
Normal operationWired remote
controller control
error
602Communication error between
master and slave wired remote
controller
Check the option switch that distinguishes
master and slave (Available only for 1
master unit and 1 slave unit)
606Cross installation error of COM1/
COM2
Check the connection of outdoor unit and
wired remote controller is linked to Com2
terminal of the indoor unit
EAWired remote controller COM2
setting option error
Check the Dip switch for Com1 and Com2
is set to Com2

Samsung ACH1800E air conditioners error codes

ERROR CODEERROR DESCRIPTIONREFERENCE PART
ElIndoor unit room thermistor errorEC01
E5Indoor unit pipe thermistor errorEC02
E6Outdoor unit thermistor errorEC03
E9Float switch open errorEC04
EACommunication error between indoor unit and outdoor unitEC05
ECCommunication error between wired remote controller and indoor unitEC06
EDOutdoor unit pipe thermistor errorEC07
ELReverse power of 3 phase power source detected (3 phase model)EC08
Trouble shooting by outdoor unit error code
ERROR CODEERROR DESCRIPTIONREFERENCE PART
*1Indoor unit room thermistor errorEC01
*5Indoor unit pipe thermistor errorEC02
*6Outdoor unit thermistor errorEC03
*9Float switch open errorEC04
*ACommunication error between indoor unit and outdoor unitEC05
‘CCommunication error between wired remote controller and indoor unitEC06
*DOutdoor unit pipe thermistor errorEC07
*LThree phase power incorrect connecting error (In case of three phase power models)EC08

Samsung AM036FXMDCH air conditioners error codes

No.CodeDescription
1E201Communication error between indoor and outdoor unit (Tracking failure or the setting quantity/address of indoor unit in outdoor unit's PCB differs from the quantity/address of installed indoor unit.)
2E202Communication error between indoor and outdoor unit (All the indoor communication error, outdoor communication cable error.)
3E203Communication error between main and sub micom or communication error between main and sub outdoor units.
4E221Error on ambient temperature sensor of outdoor unit. (Open or Short)
5E251Error on discharge temperature sensor of compressor. (Open or Short)
6E231Error on Cond-out temperature sensor of outdoor unit. (Open or Short)
7E291High pressure sensor error (Open/Short)
8E296Low pressure sensor error (Open/Short)
9E308Suction sensor error (Open/Short)
10E311Double tube sensor error (Open/Short)
11E403Antifreeze error
12E407Compressor stop by high pressure protection control
13E410Compressor stop by low pressure protection control
14E416Compressor stop by discharge temperature protection control
15E419EEV open error
16E425Reverse phase detection error
17E438EVI EEV open error
18E439Refrigerant leakage error (during stop status)
19E440Prohibition of heating operation when the ambient temperature is over 30®C
20E441Prohibition of cooling operation when the ambient temperature is below -15®C
21E443Refrigerant leakage error (during operation)
22E458Outdoor fan 1 error
23E460Power or voltage in connection wire between indoor-outdoor unit
24E461Compressor starting error
25E462Total current protection controi compressor stops
26E463OLP temperature control, compressor stops
27E464IPM over current error
28E465Compressor overload error
29E466DC-Link voltage under/over error
30E467Compressor rotation error
31E468Current sensor error
32E469DC LINK voltage sensor error
33E470EEPROM read/write error
34E471EEPROM unmatching error
35E474Heat sink temperature error
36E475Outdoor fan 2 error
37E484PFC overload
38E485Input current sensor error
39E500Heat sink overheat
40E554Gas leak error

Samsung AMFNHDCH air conditioners error codes

Abnormal conditionsError codeLED Display    
Samsung AMFNHDCH errorSamsung AMFNHDCH errorSamsung AMFNHDCH errorSamsung AMFNHDCH errorSamsung AMFNHDCH error
Error on indoor temperature sensor (Short or Open)E121XX-XX
1. Error on Eva-in sensor (Short or Open)E122-X-XX
2. Error on Eva-out sensor (Short or Open)E123
3. Discharge sensor error (Short or Open)E126
Indoor fan errorE154XXXX
1. Error on outdoor temperature sensor (Short or Open)E221-XX-X
2. Error on cond sensorE237
3. Error on discharge sensorE251
Other outdoor unit sensor error that is not on the above list
1. When there is no communication between the indoor-outdoor units for 2 minutesE101XX--X
2. Communication error received from the outdoor unitE102
3. 3 miniute tracking error on outdoor unitE202
4. Communication error after tracking due to unmatching number of installed unitsE201
5. Error due to repeated communication addressE108
6. Communication address not confirmedE109
Other outdoor unit communication error that is not on the above list
Self diagnosis error displayE151XX---
1. Error due to opened EEV (2nd detection)E152
2. Error due to closed EEV (2nd detection)E128
3. Eva in sensor is detachedE129
4. Eva out sensor is detachedE198
5. Thermal fuse error (Open)
( - ) -Flickering ( x) - Of