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
| Code | What it means |
|---|---|
| E1 | System down — communication error after tracking |
| E2 | Mismatched number of indoor units |
| E3 | Indoor float switch error |
| E5 | Indoor option switch setting error |
| E101 | Communication error between indoor unit and panel |
| E102 | Communication error (indoor–outdoor) |
| E121 | Indoor room temp sensor open/short |
| E122 | Indoor EVAP IN sensor open/short |
| E123 | Indoor EVAP OUT sensor open/short |
| E128 | Indoor EVAP IN sensor breakaway |
| E129 | Indoor EVAP OUT sensor breakaway |
| E130 | Simultaneous EVAP IN/OUT sensor breakaway |
| E131 | Auxiliary heater sensor 1 error |
| E132 | Auxiliary heater sensor 2 error |
| E133 | Auxiliary heater sensor 3 error |
| E134 | Shutter sensor error |
| E135 | Perfect fan sensor error |
| E140 | MCU temp sensor open/short |
| E151 | Indoor EEV open failure |
| E152 | Indoor EEV close failure |
| E153 | Indoor float switch detection |
| E154 | Indoor fan error |
| E161 | Mixed operation error (cool & heat at once) |
| E162 | Indoor EEPROM error |
| E163 | Option setting error |
| E165 | Electric heater discharge temp protection error |
| E166 | No-fan error related to electric heater |
| E167 | Option peripheral S/W setup error |
| E180 | 1st MCU sol valve cool/heat open at once |
| E181 | 2nd MCU sol valve cool/heat open at once |
| E182 | 2nd MCU sol valve error |
| E190 | No EVAP IN temp change during piping check |
| E191 | No EVAP OUT temp change during piping check |
| E192 | EVAP IN temp error during piping check |
| E193 | EVAP OUT temp error during piping check |
| E201 | Installed indoor unit count setting error |
| E202 | Communication error indoor–outdoor |
| E203 | Outdoor PCB micom main–sub comm error |
| E210 | Outdoor–MCU communication error |
| E211 | Indoor connected to confluence kit w/o continuity |
| E212 | Confluence kit & address setting error |
| E213 | MCU address mismatch with indoor address |
| E214 | MCU quantity setup error on outdoor PCB |
| E215 | Indoor address in MCU error |
| E216 | MCU indoor DIP switch ON error |
| E217 | MCU indoor DIP switch OFF error |
| E221 | Outdoor temp sensor open/short |
| E226 | Outdoor temp sensor breakaway |
| E231 | Condenser-out main temp sensor open/short |
| E241 | Outdoor condenser-mid sensor breakaway |
| E246 | Condenser-out 1 breakaway |
| E251 | PWM discharge temp sensor open/short |
| E256 | Fixed comp 1 discharge sensor open/short |
| E257 | Fixed comp 2 discharge sensor open/short |
| E258 | Fixed comp 3 discharge sensor open/short |
| E261 | Digital discharge sensor breakaway |
| E262 | Fixed 1 discharge sensor breakaway |
| E263 | Fixed 2 discharge sensor breakaway |
| E264 | Fixed 3 discharge sensor breakaway |
| E265 | Sump main sensor breakaway |
| E266 | Sump sub 1 breakaway |
| E267 | Sump sub 2 breakaway |
| E268 | Sump sub 3 breakaway |
| E269 | Suction sensor breakaway |
| E271 | Sump digital temp sensor open/short |
| E276 | Sump fixed 1 temp sensor open/short |
| E277 | Sump fixed 2 temp sensor open/short |
| E278 | Sump fixed 3 temp sensor open/short |
| E291 | High pressure sensor open/short |
| E296 | Low pressure sensor open/short |
| E301 | High pressure sensor breakaway |
| E306 | Low pressure sensor breakaway |
| E308 | Suction temp sensor error (open/short) |
| E312 | Main cooling sol valve open error |
| E313 | 4-way valve operation error |
| E401 | Outdoor freezing detection 1 |
| E402 | Outdoor freezing detection 2 |
| E403 | Outdoor freezing detection 3 (comp down) |
| E404 | Outdoor overload 1 protection error |
| E405 | Outdoor overload 2 protection error |
| E406 | Outdoor overload 3 protection error |
| E407 | Comp down by HP sensor protection 1 |
| E408 | Comp down by HP sensor protection 2 |
| E409 | Comp down by HP sensor protection 3 |
| E410 | Comp down by LP sensor protection 1 |
| E411 | Comp down by LP sensor protection 2 |
| E412 | Comp down by LP sensor protection 3 |
| E413 | Outdoor sump down 1 protection |
| E414 | Outdoor sump down 2 protection |
| E415 | Outdoor sump down 3 protection |
| E416 | Outdoor discharge temp 1 protection |
| E417 | Outdoor discharge temp 2 protection |
| E418 | Outdoor discharge temp 3 protection |
| E419 | Outdoor EEV open 1 self-diagnosis error |
| E420 | Outdoor EEV open 2 self-diagnosis error |
| E421 | Outdoor EEV open 3 self-diagnosis error |
| E422 | Outdoor EEV close 1 self-diag (refrigerant blocked) |
| E423 | Outdoor EEV close 2 self-diagnosis error |
| E424 | Outdoor EEV close 3 self-diagnosis error |
| E425 | Outdoor reverse phase detection 1 error |
| E426 | Outdoor reverse phase detection 2 error |
| E427 | Outdoor reverse phase detection 3 error |
| E428 | Outdoor compression rate 1 error |
| E429 | Outdoor compression rate 2 error |
| E430 | Outdoor compression rate 3 error |
| E440 | Heating forbidden when outdoor temp >30°C |
| E441 | Cooling forbidden when outdoor temp <-5°C |
| E442 | Refrigerant charging error in heating mode |
| E452 | Instant power off (clears when comp runs) |
| E458 | Outdoor fan error |
| E461 | Compressor starting error |
| E462 | AC input current limit trip error |
| E464 | IPM overcurrent (OC) error |
| E465 | Compressor V/I limit error |
| E466 | DC-link voltage under/over error |
| E467 | Compressor wire missing error |
| E468 | Current sensor error |
| E469 | DC-link voltage sensor error |
| E470 | EEPROM data error (no data) |
| E471 | EEPROM data error (main–inverter micom) |
| E474 | Heatsink sensor error |
| E483 | Overvoltage protection error |
| E484 | PFC overload error |
| E485 | Input current sensor error |
| E488 | AC input voltage sensor error |
| E500 | Heatsink over-temperature error |
| E551 | Defrosting operation |
| E552 | Low discharge pressure |
| E554 | Full refrigerant leak (outdoor charging failure) |
| E601 | Wired remote–indoor communication error |
| E602 | Master–slave wired remote comm error |
| E603 | 7-day scheduler–wired remote comm error |
| E701 | Float switch detection error |
| E702 | Indoor EEV closing error |
| E703 | Indoor EEV opening error |
| E704 | MCU sol valve failure |
| Ch | Compressor start delay (crankcase heater) |
| P0 | System down — high discharge temp sensor |
| P1 | System down — high condenser temp |
| P2 | Sump comp down |
| P3 | System down — low temp switch detection |
| P4 | System start down — reverse phase |
| P5 | System down — frozen heat exchanger |
| P6 | Momentary power failure (clears on off/on) |
| P7 | Comp down — high pressure sensor protection |
| P8 | Comp down — low pressure sensor protection |
| P9 | Problem removing frost |
| PA | Comp down — condensation ratio protection |
| t1 | Outdoor temp sensor error (open/short) |
| t2 | Condenser temp sensor error (open/short) |
| t3 | PWM discharge temp sensor error (open/short) |
| t4 | Liquid line temp sensor error (open/short) |
| t5 | Oil temp sensor error (open/short) |
| t6 | Suction temp sensor error (open/short) |
| t7 | High pressure sensor error (open/short) |
| t8 | Low pressure sensor error (open/short) |
| t9 | Fixed comp discharge sensor error (open/short) |
| G2 | Outdoor full refrigerant leak / charging failure |
| G3 | Outdoor condenser-mid sensor breakaway |
| G6 | Oil temp sensor breakaway |
| G7 | Suction sensor breakaway |
| GC | Load compressor discharge sensor breakaway |
| tU | Outdoor temp below -5°C in cooling |
| to | Outdoor temp above 30°C in heating |
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