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Samsung Error Codes

Every Samsung error code we have catalogued, with what it means on site — 164 codes in total. In R-Pro, tap any code to get the meaning, likely causes and inspection steps, even with no signal in the plant room.

164 codes
CodeWhat it means
E1System down — communication error after tracking
E2Mismatched number of indoor units
E3Indoor float switch error
E5Indoor option switch setting error
E101Communication error between indoor unit and panel
E102Communication error (indoor–outdoor)
E121Indoor room temp sensor open/short
E122Indoor EVAP IN sensor open/short
E123Indoor EVAP OUT sensor open/short
E128Indoor EVAP IN sensor breakaway
E129Indoor EVAP OUT sensor breakaway
E130Simultaneous EVAP IN/OUT sensor breakaway
E131Auxiliary heater sensor 1 error
E132Auxiliary heater sensor 2 error
E133Auxiliary heater sensor 3 error
E134Shutter sensor error
E135Perfect fan sensor error
E140MCU temp sensor open/short
E151Indoor EEV open failure
E152Indoor EEV close failure
E153Indoor float switch detection
E154Indoor fan error
E161Mixed operation error (cool & heat at once)
E162Indoor EEPROM error
E163Option setting error
E165Electric heater discharge temp protection error
E166No-fan error related to electric heater
E167Option peripheral S/W setup error
E1801st MCU sol valve cool/heat open at once
E1812nd MCU sol valve cool/heat open at once
E1822nd MCU sol valve error
E190No EVAP IN temp change during piping check
E191No EVAP OUT temp change during piping check
E192EVAP IN temp error during piping check
E193EVAP OUT temp error during piping check
E201Installed indoor unit count setting error
E202Communication error indoor–outdoor
E203Outdoor PCB micom main–sub comm error
E210Outdoor–MCU communication error
E211Indoor connected to confluence kit w/o continuity
E212Confluence kit & address setting error
E213MCU address mismatch with indoor address
E214MCU quantity setup error on outdoor PCB
E215Indoor address in MCU error
E216MCU indoor DIP switch ON error
E217MCU indoor DIP switch OFF error
E221Outdoor temp sensor open/short
E226Outdoor temp sensor breakaway
E231Condenser-out main temp sensor open/short
E241Outdoor condenser-mid sensor breakaway
E246Condenser-out 1 breakaway
E251PWM discharge temp sensor open/short
E256Fixed comp 1 discharge sensor open/short
E257Fixed comp 2 discharge sensor open/short
E258Fixed comp 3 discharge sensor open/short
E261Digital discharge sensor breakaway
E262Fixed 1 discharge sensor breakaway
E263Fixed 2 discharge sensor breakaway
E264Fixed 3 discharge sensor breakaway
E265Sump main sensor breakaway
E266Sump sub 1 breakaway
E267Sump sub 2 breakaway
E268Sump sub 3 breakaway
E269Suction sensor breakaway
E271Sump digital temp sensor open/short
E276Sump fixed 1 temp sensor open/short
E277Sump fixed 2 temp sensor open/short
E278Sump fixed 3 temp sensor open/short
E291High pressure sensor open/short
E296Low pressure sensor open/short
E301High pressure sensor breakaway
E306Low pressure sensor breakaway
E308Suction temp sensor error (open/short)
E312Main cooling sol valve open error
E3134-way valve operation error
E401Outdoor freezing detection 1
E402Outdoor freezing detection 2
E403Outdoor freezing detection 3 (comp down)
E404Outdoor overload 1 protection error
E405Outdoor overload 2 protection error
E406Outdoor overload 3 protection error
E407Comp down by HP sensor protection 1
E408Comp down by HP sensor protection 2
E409Comp down by HP sensor protection 3
E410Comp down by LP sensor protection 1
E411Comp down by LP sensor protection 2
E412Comp down by LP sensor protection 3
E413Outdoor sump down 1 protection
E414Outdoor sump down 2 protection
E415Outdoor sump down 3 protection
E416Outdoor discharge temp 1 protection
E417Outdoor discharge temp 2 protection
E418Outdoor discharge temp 3 protection
E419Outdoor EEV open 1 self-diagnosis error
E420Outdoor EEV open 2 self-diagnosis error
E421Outdoor EEV open 3 self-diagnosis error
E422Outdoor EEV close 1 self-diag (refrigerant blocked)
E423Outdoor EEV close 2 self-diagnosis error
E424Outdoor EEV close 3 self-diagnosis error
E425Outdoor reverse phase detection 1 error
E426Outdoor reverse phase detection 2 error
E427Outdoor reverse phase detection 3 error
E428Outdoor compression rate 1 error
E429Outdoor compression rate 2 error
E430Outdoor compression rate 3 error
E440Heating forbidden when outdoor temp >30°C
E441Cooling forbidden when outdoor temp <-5°C
E442Refrigerant charging error in heating mode
E452Instant power off (clears when comp runs)
E458Outdoor fan error
E461Compressor starting error
E462AC input current limit trip error
E464IPM overcurrent (OC) error
E465Compressor V/I limit error
E466DC-link voltage under/over error
E467Compressor wire missing error
E468Current sensor error
E469DC-link voltage sensor error
E470EEPROM data error (no data)
E471EEPROM data error (main–inverter micom)
E474Heatsink sensor error
E483Overvoltage protection error
E484PFC overload error
E485Input current sensor error
E488AC input voltage sensor error
E500Heatsink over-temperature error
E551Defrosting operation
E552Low discharge pressure
E554Full refrigerant leak (outdoor charging failure)
E601Wired remote–indoor communication error
E602Master–slave wired remote comm error
E6037-day scheduler–wired remote comm error
E701Float switch detection error
E702Indoor EEV closing error
E703Indoor EEV opening error
E704MCU sol valve failure
ChCompressor start delay (crankcase heater)
P0System down — high discharge temp sensor
P1System down — high condenser temp
P2Sump comp down
P3System down — low temp switch detection
P4System start down — reverse phase
P5System down — frozen heat exchanger
P6Momentary power failure (clears on off/on)
P7Comp down — high pressure sensor protection
P8Comp down — low pressure sensor protection
P9Problem removing frost
PAComp down — condensation ratio protection
t1Outdoor temp sensor error (open/short)
t2Condenser temp sensor error (open/short)
t3PWM discharge temp sensor error (open/short)
t4Liquid line temp sensor error (open/short)
t5Oil temp sensor error (open/short)
t6Suction temp sensor error (open/short)
t7High pressure sensor error (open/short)
t8Low pressure sensor error (open/short)
t9Fixed comp discharge sensor error (open/short)
G2Outdoor full refrigerant leak / charging failure
G3Outdoor condenser-mid sensor breakaway
G6Oil temp sensor breakaway
G7Suction sensor breakaway
GCLoad compressor discharge sensor breakaway
tUOutdoor temp below -5°C in cooling
toOutdoor temp above 30°C in heating

Official Samsung source / manual ↗

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