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Error code reference
Samsung Air Conditioner Error Codes
573 error codes documented with diagnostic procedures.
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*1Indoor unit room thermistor sensor error (wired remote controller; * = indoor unit…*5Indoor unit pipe sensor error (wired remote controller; * = indoor unit address).*6Outdoor unit thermistor sensor error (wired remote controller; * = indoor unit address).*9Float switch error (wired remote controller; * = indoor unit address).*AIndoor and outdoor unit communication error (wired remote controller; * = indoor unit…*CWired remote controller to indoor unit communication error (first digit is indoor unit…*DOutdoor unit pipe sensor error (wired remote controller; * = indoor unit address).*LThree phase power incorrect connecting error (wired remote controller; three phase power…05Indoor unit heat exchanger inlet temperature sensor error (open or short).06EEPROM error on indoor unit PCB.09Error in option setup11Abnormal increase of operation current (compressor protection error).12Abnormal increase of discharge temperature (discharge sensor temperature trip).121Indoor unit room temperature sensor error (Open/Short)122Indoor unit heat exchanger IN sensor error (Open/Short)123Indoor unit heat exchanger OUT sensor error (Open/Short)128Indoor unit heat exchanger IN sensor dislocation error.129Indoor unit heat exchanger OUT sensor dislocation error.13Abnormal increase of OLP temperature (OLP sensor temperature trip).130Simultaneous indoor unit heat exchanger IN and OUT sensor dislocation error.135Indoor clean fan rotational frequency feedback error.14Over current of IPM circuit (instantaneous over-current protection).15Abnormal increase of heatsink temperature.1512nd opening error of indoor electrically operated valve (EEV).1522nd closing error of indoor electrically operated valve (EEV).153Indoor floating sensor error (drain pump float switch detection).154Indoor fan motor error161Mixed operation error162EEPROM error163Indoor unit remote controller option input is wrong or not entered (EEPROM option error).17Outdoor unit outdoor temperature sensor error (open or short).170Mixed use of Fahrenheit/Celsius setup18BLDC compressor starting/rotation error.185Power input error into indoor unit communication line186Clean Unit (SPi) feedback error.201Communication error between indoor and outdoor units after completing initial tracking…202Communication error among all indoor units.203Communication error between main and sub outdoor units or between main and sub MICOMs.221Outdoor unit temperature sensor error (Open/Short)226Outdoor temperature sensor dislocation error.231COND OUT main temperature sensor error (Open/Short)241Outdoor COND OUT temperature sensor dislocation error.246Outdoor COND OUT temperature sensor dislocation error (RD040/050 model).251Digital compressor discharge temperature sensor error (Open/Short)257Fixed scroll compressor 2 discharge temperature sensor error (Open/Short)258Fixed scroll compressor 3 discharge temperature sensor error (Open/Short)261Digital compressor discharge temperature sensor dislocation error.263Fixed scroll compressor 2 discharge temperature sensor dislocation error.264Fixed scroll compressor 3 discharge temperature sensor dislocation error.265SUMP sensor dislocation error.269SUCTION sensor dislocation error.271SUMP temperature digital sensor error (Open/Short)291High pressure sensor error (Open/Short)296Low pressure sensor error (Open/Short)307Oil balance valve (balance keeping) temperature sensor error (Open/Short)308Suction temperature sensor error (Open/Short)31Outdoor unit discharge temperature sensor error (open or short).311Liquid pipe (double pipe) temperature sensor error (Open/Short)312Main cooling solenoid valve open error.32Abnormal increase of discharge temperature (comp discharge gas temperature trip).320OLP sensor error (Open/Short).321EVI IN temperature sensor error (Open/Short)322EVI OUT temperature sensor error (Open/Short)33Abnormal increase of OLP temperature (comp top OLP temperature trip).36Current sensor error on outdoor control board.37Heatsink temperature sensor error on IPM module.38Voltage sensor error on outdoor control board.403Freezing control causes compressor down407Compressor down by high pressure sensor protection control410Compressor down by low pressure sensor protection control413Protection control by SUMP sensor416Compressor down by discharge temperature425Outdoor compression ratio error / 3-phase reverse phase or phase fail detection428Compressor down by compression ratio control431Balance keeping valve 1 (oil valve) self-diagnosis438EVI EEV opening error.440Prohibit heating operation for outdoor temperature over 86F/30C.442Prohibit heat filling mode for outdoor temperature over 59F/15C.443High pressure below the average before cooling452Instant blackout error / outdoor unit power frequency error.453Error by high temperature outdoor fan motor454Outdoor fan RPM error456Outdoor fan over-voltage error457Outdoor fan counter-rotation error458Over-voltage error detected in compressor current sensor461Low-voltage (low-amperage) error detected in compressor current sensor462Current protection control causes compressor down463OLP protection control causes compressor down475Electrical malfunctions of the outdoor machine (fan stuck, poor connection, damaged fan).477Liquid compressor protection control7021st close indoor electrically operated valve error.7031st open indoor electrically operated valve error.AxBreakaway of xth indoor unit EVAP IN sensor (x = indoor unit address).BxBreakaway of xth indoor unit EVAP OUT sensor (x = indoor unit address).ChCompressor preheating in progressCxError of electronic expansion valve open in outdoor unit (x = indoor unit address 0-F…dxError of electronic expansion valve close in outdoor unit (x = indoor unit address 0-F…E0Outdoor unit sensor error (short/open)E1System down caused by communication error after completion of tracking, or mismatching of…E101Indoor unit communication errorE102Communication error between indoor unit and outdoor unit, displayed in indoor unit.E103Indoor unit EVAP OUT (heat exchanger outlet) sensor open/short error.E104Communication error between Outdoor Main and Inverter Micom (occurred after 1 minute…E105Indoor unit EVAP OUT sensor breakaway (sensor detached from pipe).E106Indoor unit EVAP IN sensor breakaway (detached from pipe).E107Indoor unit EVAP OUT sensor breakaway (detached from pipe).E108Error due to repeated address setting when 2 or more devices have the same address within…E109Communication address not confirmed for outdoor unit.E110Auxiliary (electric) heater sensor 3 error.E111Shutter sensor error.E112Perfect fan sensor error.E113MCU temperature sensor open/short error.E121Indoor unit room temperature sensor error (Open/Short)E122Indoor heat exchanger EVAP IN sensor open/short error due to connector dislocation, wire…E123Indoor heat exchanger EVAP OUT sensor open/short error due to connector dislocation, wire…E124Indoor fan motor error (starting error or lock).E125Mixed operation error (heating and cooling modes operating at the same time).E126Discharge sensor error (Short or Open).E127Option setting error on indoor unit.E128Indoor heat exchanger EVAP IN sensor dislocation errorE129Indoor heat exchanger EVAP OUT sensor dislocation errorE130Heat exchanger in/out sensors of indoor unit are both detached simultaneously.E131Error connecting power line to communication line of indoor unit.E135Indoor clean fan rotational frequency feedback errorE151Error due to opened EEV of indoor unit (2nd detection)E152Error due to closed EEV of indoor unit (2nd detection)E153Indoor unit float switch error-float switch open for longer than 1 minute indicating…E154Setting error of option switches for wired remote controller-address mismatch between…E155Mixed operation error (operating heat and cool mode at same time).E156EEPROM option error on indoor unit.E157Option setting error.E158Electric heater discharge temperature protect error.E159No fan error related to the electric heater.E160Indoor unit fan motor starting errorE161Mixed operation errorE162EEPROM errorE163Option error of remote controller for indoor unit (missed or erroneous input of remote…E164No change of EVAP IN temperature during piping check.E165No change of EVAP OUT temperature during piping check.E166Change of EVAP IN temperature of other indoor unit detected during piping check.E167Change of EVAP OUT temperature of other indoor unit detected during piping check.E168Indoor unit heat exchanger in and out temperature sensors both detached.E170Mixed use of Fahrenheit/Celsius setup errorE171Indoor unit EEV open error-refrigerant leaks to stopped indoor unit.E172Change of EVAP IN temperature of other indoor unit during piping check.E173Change of EVAP OUT temperature of other indoor unit during piping check.E175More than 2 indoor units cool and heat simultaneously (mixed operation error).E1801st simultaneous MCU SOL Valve cooling/heating openingE181Simultaneous opening of cooling/heating MCU SOL valve (2nd detection).E185Power input error into indoor unit communication lineE186Clean Unit (SPI) feedback errorE190Pipe test errorE191Pipe test errorE198Error due to disconnected thermal fuse of indoor unit.E199No pipe check operation performed after installation through auto addressing mode.E2Tracking errorE201Communication error between indoor and outdoor units after completing initial tracking…E202Communication error between indoor and outdoor units (communication error on all indoor…E203Communication error between main and sub outdoor units or between main and sub MICOMs.E204Communication error between outdoor units and MCU after completing initial tracking…E205Communication error on all PBA within the outdoor unit C-Box, communication cable error.E206Internal PCB communication error of outdoor unit C-Box (C001=HUB, C002=FAN, C003=INV1…E207MCU address does not match with indoor unit address.E208Installed MCU quantity setup error in the outdoor PCB or MCU address setting overlapped.E209Rotary switch for indoor unit address in MCU was overlapped among MCUs.E210MCU confluence kit connection error-indoor unit connected to confluence kit without…E211MCU branch part setup errorE212MCU branch part setup errorE213Communication error between outdoor unit and MCU-installed MCU quantity setup error or…E214MCU branch part setup errorE215MCU DIP switch setup error-DIP switch for indoor unit set ON even though indoor unit was…E216MCU DIP switch setup error-DIP switch for indoor unit set OFF even though indoor unit was…E217MCU branch part setup errorE218MCU branch part setup errorE219MCU branch part setup errorE220More actual indoor unit connections than number assigned to MCU.E221Outdoor unit temperature sensor error (Open/Short)E222Outdoor COND-OUT temperature sensor open/short error.E223Outdoor COND MID temperature sensor open/short error.E224Outdoor COND-MID sensor breakaway.E225Outdoor COND-OUT sensor breakaway.E226PWM discharge temperature sensor open/short error (detected when outdoor temperature is…E230Compressor OLP sensor error (short/open)E231COND_OUT main temperature sensor error (Open/Short)E232Compressor discharge temperature sensor breakaway for fixed 1 compressor (main outdoor…E233Compressor discharge temperature sensor breakaway for fixed 2 compressor (main outdoor…E235Compressor sump temperature (oil temperature) sensor breakaway for digital compressor or…E236Inverter Compressor Discharge TempE237Suction temperature sensor breakawayE241Discharge temperature sensor error-wire open or short.E242Equal oil temperature sensor error (open/short).E246Outdoor unit sensor errorE251Digital compressor discharge temperature sensor open/short error (over 4.95V or below…E252COND OUT sensor breakaway on outdoor unitE253Fixed compressor discharge temperature sensor error-wire open or short.E254Compressor discharge sensor error (Short/Open)E255MCU temperature sensor open/short error.E256Compressor OLP sensor error (Short/Open)E257Fixed scroll compressor 2 discharge temperature sensor error (Open/Short)E258Fixed scroll compressor 3 discharge temperature sensor error (Open/Short)E260Breakaway of outdoor unit COND OUT sensor-sensor detached.E261Digital compressor discharge temperature sensor dislocation error.E262Digital compressor discharge temperature sensor breakawayE263Fixed compressor 2 discharge temperature sensor breakawayE264Fixed compressor 3 discharge temperature sensor breakawayE265SUMP sensor dislocation errorE266Top sensor of compressor 1 is detached.E267Top sensor of compressor 2 is detached.E268Sump Sub 2 breakaway error.E269SUCTION sensor dislocation errorE270Suction breakaway error.E271SUMP temperature digital sensor open/short error (over 4.95V or below 0.5V, detection…E272Low pressure sensor error-wire open or short.E276Error on top sensor of compressor 1 (Short or Open).E277Error on top sensor of compressor 2 (Short or Open).E291High pressure sensor error (Open/Short)E296Low pressure sensor error (Open/Short)E3Communication error after completion of trackingE3_01Indoor fan motor errorE302Outdoor temperature sensor breakaway.E303Communication error between indoor unit and outdoor unit after completion of trackingE304COND-OUT SUB 1 temperature sensor error OPEN/SHORT.E305COND-MID sensor breakaway of outdoor unit.E306Low pressure sensor is detached.E307PWM discharge temperature sensor error OPEN/SHORTE308Suction temperature sensor open/short errorE309Fixed capacity compressor 2 discharge sensor error OPEN/SHORTE310Fixed capacity compressor 3 discharge sensor error OPEN/SHORTE311SUMP TEMP DIGITAL sensor error OPEN/SHORTE312SUMP TEMP FIXED 1 sensor error OPEN/SHORTE313SUMP TEMP FIXED 2 sensor error OPEN/SHORTE314SUMP TEMP FIXED 3 sensor error OPEN/SHORTE315High pressure sensor error OPEN/SHORTE316Low pressure sensor error OPEN/SHORTE317High pressure sensor breakaway.E318Low pressure sensor breakaway.E319Suction temperature sensor error OPEN/SHORT.E320Main cooling solenoid valve open error.E321EVI IN temperature sensor errorE322EVI OUT temperature sensor errorE323Error on suction sensor 2 (Short or Open).E346Error due to operation failure of outdoor unit Fan2.E347Motor wire of outdoor unit Fan2 is not connected.E348Lock error on Fan2 of outdoor unit.E353Error due to overheated motor of outdoor unit Fan2.E355Error due to overheated IPM of Fan2.E361Error due to operation failure of inverter compressor 2.E364Error due to over-current of inverter compressor 2.E365V-limit error of inverter compressor 2.E366Error due to over voltage/low voltage of inverter PBA2.E367Error due to unconnected wire of compressor 2.E368Output current sensor error of inverter PBA2.E369DC voltage sensor error of inverter PBA2.E374Heat sink temperature sensor error of inverter PBA2.E378Error due to overcurrent of Fan2.E385Error due to input current of inverter 2.E386Over-voltage/low-voltage error of Fan2.E387Hall IC connection error of Fan2.E389V-limit error on Fan2 of compressor.E393Output current sensor error of Fan2.E396DC voltage sensor error of Fan2.E399Heat sink temperature sensor error of Fan2.E4Indoor unit float switch errorE400Error due to overheat caused by contact failure on IPM of Inverter PBA2.E401Instant power-off errorE402Outdoor unit compressor discharge temperature 1 protection control.E403Prohibit starting by low pressureE404Outdoor unit overload and compressor stop (protection control in heating mode).E405COND-MID sensor breakaway of outdoor unit.E406COND-OUT 1 sensor breakaway.E407PWM discharge temperature sensor OPEN/SHORT error. Detected when outdoor temp over -10°C…E408Fixed capacity compressor 1 discharge sensor OPEN/SHORT errorE409Fixed capacity compressor 2 discharge sensor OPEN/SHORT error. Detected when outdoor temp…E410Fixed capacity compressor 3 discharge sensor OPEN/SHORT error. Detected when outdoor temp…E411Digital discharge sensor breakaway.E412Fixed 1 discharge sensor breakaway.E413Protection control by SUMP sensorE414Fixed 3 discharge sensor breakaway.E415Sump-main sensor breakaway error.E416Outdoor unit high discharge temperatureE417Sump Sub 2 sensor breakaway error.E418Sump Sub 3 sensor breakaway error.E419Outdoor unit EEV open (stopped indoor units)E420SUMP TEMP DIGITAL sensor OPEN/SHORT error. Detected when outdoor temp over -10°C. Error…E421SUMP TEMP FIXED 1 sensor OPEN/SHORT error. Detected when outdoor temp over -10°C. Error…E422SUMP TEMP FIXED 2 sensor OPEN/SHORT error. Detected when outdoor temp over -10°C. Error…E423SUMP TEMP FIXED 3 sensor OPEN/SHORT error. Detected when outdoor temp over -10°C. Error…E424High pressure sensor OPEN/SHORT errorE425Reverse phase of 3-phase powerE426Prohibit heating mode operation when outdoor temperature exceeds 30°C.E427Prohibit cooling mode operation when outdoor temperature is below -5°C.E428Compressor down due to compression ratio controlE429Main cooling solenoid valve open error.E430Low pressure switch operation.E431Oil balance valve 1 (balance keeping valve) self-diagnosis errorE438EVI (ESC) EEV leakage or internal leakage of intercooler or incorrect connector insertion…E439Error due to refrigerant leakageE440High temperature (over 30°C) of outdoor in heating modeE441Low temperature (under -10°C) of outdoor in cooling modeE442Refrigerant charging restriction in heating mode when air temperature is over 15°C.E443High pressure below the average before coolingE445CCH malfunction and sump sensor miswiring errorE446Error due to operation failure of outdoor unit Fan1.E447Motor wire of outdoor unit Fan1 is not connected.E448Lock error on Fan1 of outdoor unit.E450Abnormally high temperature on condenser (2nd detection).E451Low pressure switch (2nd detection).E452Error due to ZPC detection circuit problem or power failure (momentary blackout).E453Error by high temperature in outdoor fan motorE454Outdoor fan RPM error (RPM lower than 50 or more than 100 RPM difference from expected).E455Error due to overheated IPM of Fan1 (IPM internal temperature more than 85°C).E456Outdoor fan over-voltage errorE457Outdoor fan counter-rotation errorE458Over voltage detected in compressor current (CT) sensorE459Outdoor Fan 2 ErrorE460Wrong connection between communication and power cable.E461Low-voltage (low amperage) error detected in compressor current sensor (CT sensor value…E462Current protection control causes compressor downE463OLP protection control causes compressor downE464Compressor down by compressor discharge temperature sensor value exceeding 135°C.E465Compressor over current errorE466Compressor over current error by compression ratioE467Error due to unconnected wire of compressor 1.E468Compressor low current errorE469DC voltage sensor error of inverter PBA1.E470Compressor trip by OLP temperature control mode.E471Digital compressor loading failure or OLP trip detected based on temperature/pressure…E472Low temperature (under -5°C) of indoor in cooling mode.E473Inverter compressor starting failure (5 times).E474Heat sink temperature sensor error of inverter PBA1.E475Electrical malfunctions of the outdoor machineE476DC link voltage error (under 150V or over 410V).E477Liquid compressor protection controlE478DC-link voltage error (under 150V or over 410V)E479Compressor rotation error.E480Current sensor error.E481DC-link voltage sensor error.E482Compressor overload protection.E484OTP error (over temperature protection).E485Error due to input current of inverter 1.E486Error due to over voltage/low voltage of outdoor fan PCB.E487Hall IC error of Fan1.E489V-limit error on Fan1 of compressor.E493Output current sensor error of Fan1.E496DC voltage sensor error of Fan1.E497NO GAS error (self diagnosis)E499Heat sink temperature sensor error of Fan1.E5Setting error of option switch in indoor unitE500Error due to overheat caused by contact failure on IPM of Inverter PBA1 (IGBT module…E501Prohibit compressor starting according to outdoor temperatureE502Prohibit compressor starting according to outdoor temperatureE503Equability (oil leveling) operationE504Oil return operation (not an error, special mode to recollect compressor oil every 7…E505Error due to self diagnosis of high pressure sensor.E506Error due to self diagnosis of low pressure sensor.E551Indoor unit EEV open error (1st detection)E552Low discharge pressure (high pressure of 9 kg/cm² for 10 minutes continuous).E553Equability (oil leveling) operation between compressors (not an error).E554Indoor unit EEV close error (1st detection)E555Full leakage of refrigerant from outdoor unit.E556Compressor down by indoor unit freezing protection controlE557Indoor unit EEV close error (2nd detection)E558Indoor unit EEV open error (2nd detection)E559Indoor operation stop due to unconfirmed error on outdoor unit.E560Outdoor unit option switch setting error (inappropriate option switch is on).E563Error due to module installation of indoor unit with old software version.E565Inverter compressor operation failureE566Inverter DC peak errorE567Inverter DC Link voltage 150V or less, 410V or moreE568Inverter compressor rotation errorE569Inverter electric current errorE570Inverter DC Link sensor errorE571Inverter EEPROM READ/WRITE errorE572Inverter zero crossing errorE573Error due to using single type outdoor unit in a module installation.E575Setting the outdoor unit capacity option errorE6Abnormal outdoor temperature sensor (voltage 4.9V and higher or 0.5V and lower).E601Detection of floating switch of indoor unit drain pump (1st detection)E602Detection of floating switch of indoor unit drain pump (2nd detection)E603Communication error between 7-day scheduler and wired remote controller.E604Error of setting option for wired remote control COM2.E605Wired LED master to setup master communication error.E606CAUR to relay communication error.E607DMS to CAUR communication error.E608DMS to PEAK transmitter communication error.E609DMS to PIM transmitter communication error.E7Outdoor unit B, C units cool and heat simultaneously (cool and heat mode operating…E702Error due to closed EEV of indoor unit (1st detection).E703Error due to opened EEV of indoor unit (1st detection).E8Outdoor unit pipe is wrong connected (pipes or cables are wrong connected).E801EEPROM errorE9Outdoor unit sensor error (short/open)EAIndoor and outdoor unit communication error (displayed on outdoor unit PCB 7-segment).EA_01Communication error between indoor unit and outdoor unit.EBOutdoor unit sensor error (short/open)ECWired remote controller communication error (displayed on outdoor unit PCB 7-segment).EdAbnormal outdoor pipe temperature sensor (voltage 4.9V and higher or 0.5V and lower).ELThree phase power incorrect connecting error (displayed on outdoor unit PCB 7-segment).EoError of the outdoor unit (refer to outdoor unit installation manual for details).EUOutdoor unit sensor error (short/open)FxElectronic expansion valve open error on xth indoor unit.G2Full leakage of refrigerant or compressor loading defect detected.G3Breakaway of COND MID sensor in outdoor unit.G4Breakaway of oil temperature sensor (detected once or more times during first 30 minutes…G5Error of electronic expansion valve close in the outdoor unit (when detected more than…G6Breakaway of fixed compressor discharge sensor (detected once or more times).G7Self-diagnosis error code listed in priority sequence.G8No cooling operationG9No heating operationINDOOR_EEPROMIndoor unit EEPROM errorINDOOR_OPTIONIndoor unit option code errorK1Defrosting operation status display (heat pump model only) or operation status indicator.K2Over 30°C outdoor temperature when heating (operating status display, flickering).OCOil collection operationOPER_FLICKEROption errorOPER_TIMER_FLICKERIndoor unit heat exchanger temperature sensor error (open/short)OPER_TURBO_FLICKERAbnormal communication error between indoor and outdoor unitOPERATION_TIMER_FLICKERIndoor unit heat exchanger temperature sensor error (open/short)OPERATION_TURBO_FLICKEROutdoor unit temperature sensor error (Discharge, OLP, Deice, Outdoor temp sensors)OUTDOOR_AC_ZERO_CROSSAC Line zero-crossing errorOUTDOOR_ALL_FLICKEROutdoor unit temperature sensor error (outdoor, deice, OLP, discharge temp sensors)OUTDOOR_GREEN_FLICKERCommunication NG (communication failure)OUTDOOR_GREEN_RED_FLICKERCT sensor errorOUTDOOR_GREEN_RED_ONCompressor peak current (overcurrent) protectionOUTDOOR_NO_GASNo gas errorOUTDOOR_RED_FLICKER_GREEN_FLICKEROLP sensor error (open/short)OUTDOOR_RED_FLICKER_GREEN_ONDischarge sensor error (open/short)OUTDOOR_YELLOW_FLICKERDischarge sensor temperature tripOUTDOOR_YELLOW_FLICKER_GREEN_FLICKERCompressor rotation errorOUTDOOR_YELLOW_FLICKER_GREEN_ONOPTION error (EEPROM)OUTDOOR_YELLOW_GREEN_FLICKERHeatsink sensor errorOUTDOOR_YELLOW_GREEN_FLICKER_RED_FLICKERDC-Link voltage sensor errorOUTDOOR_YELLOW_GREEN_FLICKER_RED_ONDC fan error (SH12BWHX only)OUTDOOR_YELLOW_GREEN_ONDC-link overvoltage errorOUTDOOR_YELLOW_GREEN_RED_ALL_FLICKERPFC OC errorOUTDOOR_YELLOW_GREEN_RED_FLICKERUnit over current protectionOUTDOOR_YELLOW_GREEN_RED_ON4-Way valve errorOUTDOOR_YELLOW_ONHeatsink temperature tripOUTDOOR_YELLOW_RED_FLICKERCompressor starting errorOUTDOOR_YELLOW_RED_FLICKER_GREEN_FLICKEROLP sensor temperature tripOUTDOOR_YELLOW_RED_FLICKER_GREEN_ONDeice sensor error (open/short)OUTDOOR_YELLOW_RED_ONOutdoor sensor error (open/short)oxDetection of the float switch (x = indoor unit address 0-F).P0Error occurring between outdoor units with mixed-up communication wires, or related to…P1Control due to the condenser temperature sensor when in cooling mode (high temperature of…P2SUMP COMP DOWNP3Error occurring between outdoor units with mixed-up communication wires, or related to…P4Reverse phase or open phase errorP401High temperature of discharge sensor-discharge temperature exceeding 135°C detected…P402High temperature of COND sensor-condensate temperature of compressor reaches 67°C; system…P403COND DOWN due to SUMP control-condensate temperature reaches 95°C; system down on 6th…P404Low pressure switch detection-operation stop when low pressure is lower than 1.2 kg/cm²G…P405Freezing of indoor unit heat exchanger-temperature kept at -4°C for more than 40 seconds.P406Momentary power failure-temporary stop of compressor as protection control (not a defect).P407High pressure sensor protection-compressor stops when condensate pressure exceeds 28…P408Low pressure sensor protection-low pressure less than 3 kg/cm²G (cooling) or 0.5 kg/cm²G…P409Compressor down by high pressure sensor protection control 3.P410Protection control of condensation ratio-compressor stops when compression ratio exceeds…P411No cooling operation-cooling prohibited when outdoor temperature is below -5°C.P412No heating operation-heating prohibited when outdoor temperature is above 30°C.P413Low pressure detection error at initial compressor start-low pressure below compressor…P414Defrost operation-removing frost from outdoor heat exchanger during heating (not an…P415Low discharge pressure control-high pressure at 9 kg/cm² for 10 minutes continuously…P416Oil leveling operation-oil exchange between compressors (not an error).P417Outdoor unit discharge temperature 2 protection control.P418Oil collection operation-special operation to recollect oil discharged from compressor…P419Compressor SUMP temperature protection-SUMP temperature maintained over 95°C for 5…P420High pressure protection control-high pressure sensor value over 28 kg/cm²G.P421Low pressure protection control-low pressure sensor below 0.7 kg/cm²G (cooling) or 0.2…P422Indoor unit freezing protection-indoor heat exchanger temperature below -4°C for more…P423Outdoor unit EEV close 2 self diagnosis error.P424Outdoor unit EEV close 3 self diagnosis error.P426Outdoor unit reverse phase detection 2 error.P427Outdoor unit reverse phase detection 3 error.P428Outdoor unit compression rate 1 errorP429Outdoor unit compression rate 2 error.P430Outdoor unit compression rate 3 error.P431Forbid heating mode operation when outdoor temperature over 30°C.P432Forbid cooling mode operation when outdoor temperature below -5°C.P433Refrigerant charging operation at over 15°C outdoor temperature in heating mode.P434Instant power off (disappears when compressor runs).P5System down due to frozen heat exchanger (indoor unit heat exchanger temperature kept at…P501Outdoor unit freezing detection 1.P502Outdoor unit freezing detection 2.P503Outdoor unit freezing detection 3P504Outdoor unit overload 1 protection control error.P505Outdoor unit overload 2 protection control error.P506Outdoor unit overload 3 protection control error.P507Compressor down by high pressure sensor protection control 1.P508Compressor down by high pressure sensor protection control 2.P509Compressor down by high pressure sensor protection control 3.P510Compressor down by low pressure sensor protection control 1.P511Compressor down by low pressure sensor protection control 2.P512Compressor down by low pressure sensor protection control 3.P513Outdoor unit SUMP DOWN 1 protection control (SUMP temperature over 95°C for 5 minutes).P514Outdoor unit SUMP DOWN 2 protection control.P515Outdoor unit SUMP DOWN 3 protection control.P516Outdoor unit discharge temperature 1 protection control.P517Outdoor unit discharge temperature 2 protection control.P518Outdoor unit discharge temperature 3 protection control.P519Outdoor unit EEV open 1 self-diagnosis error.P520Outdoor unit EEV open 2 self-diagnosis error.P521Outdoor unit EEV open 3 self-diagnosis error.P522Outdoor unit EEV close 1 self-diagnosis error.P523Outdoor unit EEV close 2 self-diagnosis error.P524Outdoor unit EEV close 3 self-diagnosis error.P525Outdoor unit reverse phase detection 1 error.P526Outdoor unit reverse phase detection 2 error.P527Outdoor unit reverse phase detection 3 error.P528Outdoor unit compression rate 1 error (compression ratio over 8.5 for 5+ minutes).P529Outdoor unit compression rate 2 error.P530Outdoor unit compression rate 3 error.P531Forbid heating mode operation when outdoor temperature over 30°C.P532Forbid cooling mode operation when outdoor temperature below -5°C.P533Refrigerant charging operation at 15°C or over outdoor temperature in heating mode.P534Instant power off (disappears when compressor runs).P535Low discharge pressure detection at initial compressor start (low sensor value below…P6Compressor down due to protection control of condensation ratio (compression ratio over…P7Error of momentary power failureP701Float switch detection error (low level risk, indoor unit continues normal operation).P702Outdoor unit protection control low-level risk; indoor unit EEV opening error.P703Indoor unit EEV opening error (low level risk).P704MCU solenoid valve failure (low level risk).P8Compressor down due to protection control of low pressure sensor (less than 3 kg/cm²G in…P9Compressor down due to low pressure sensor protection control (below 3 kg/cm2G in…PACompressor down due to protection control of condensation ratio (duplicate reference…qxError of temperature sensor in the indoor unit OPEN/SHORT (x = indoor unit address 0-F).RED_FLICKER_GRN_FLICKER4-Way valve errorRED_FLICKER_GRN_ONDC-link overvoltage errorRED_ON_GRN_FLICKERCommunication error (indoor-outdoor)RED_ON_GRN_ONCompressor peak current (overcurrent) protectionrxMaster wired remote controller to Slave wired remote controller COM1/COM2 cross-installed…sxSimultaneous breakaway of indoor unit EVAP IN and EVAP OUT sensors on xth indoor unit.t1Outdoor temperature (OUT TEMP) sensor OPEN/SHORT error. Error levelt2Condenser temperature (COND TEMP) sensor OPEN/SHORT error. Error levelt3PWM discharge temperature sensor OPEN/SHORT error. Detected when outdoor temperature is…t4Liquid refrigerant pipe (COND OUT) temperature sensor error (OPEN/SHORT)t5Oil temperature sensor OPEN/SHORT error. Detected when outdoor temperature is over -10°C…t6Suction temperature sensor error (OPEN/SHORT)t7High pressure sensor OPEN/SHORT errort8Low pressure sensor OPEN/SHORT errort9Fixed compressor discharge sensor OPEN/SHORT error. Detected when outdoor temperature is…TIMER_FLICKERIndoor unit room temperature sensor error (open/short)TIMER_TURBO_FLICKERAbnormal communication error between indoor and outdoor unittoError of the heat exchanger sensor in the indoor unit (Open/Short)tuError of temperature sensor in the indoor unit (Open/Short)TURBO_FLICKERIndoor fan motor malfunctiontxEEPROM error on indoor unit (x = indoor unit address 0-F).U200Communication error between outdoor unit main and sub MICOM or between outdoor units.U201Communication error between outdoor unit main and sub MICOM or between outdoor units.U202Communication error between outdoor unit main and sub MICOM or between outdoor units.U203Communication error between outdoor unit main and sub MICOM or between outdoor units.UPTrial operation (commissioning) not completedUxEEPROM option error on indoor unit (x = indoor unit address 0-F).vxEEPROM option error in indoor unit (x = indoor unit address).YEL_FLICKER_GRN_FLICKERCompressor starting errorYEL_FLICKER_GRN_ONDischarge sensor temperature tripYEL_FLICKER_RED_FLICKERCT sensor errorYEL_FLICKER_RED_FLICKER_GRN_FLICKERPFC overcurrent errorYEL_FLICKER_RED_FLICKER_GRN_ONDC-Link voltage sensor errorYEL_FLICKER_RED_ONOLP sensor error (open/short)YEL_FLICKER_RED_ON_GRN_FLICKERDC fan error (SH12BWHX only)YEL_FLICKER_RED_ON_GRN_ONCompressor rotation errorYEL_GRN_RED_AC_LINEAC Line zero-crossing errorYEL_ON_GRN_FLICKEROutdoor sensor error (open/short)YEL_ON_GRN_ONHeatsink temperature tripYEL_ON_GRN_ON_RED_FLICKER2NO GAS errorYEL_ON_RED_FLICKERDischarge sensor error (open/short)YEL_ON_RED_FLICKER_GRN_FLICKEROPTION error (EEPROM)YEL_ON_RED_FLICKER_GRN_ONOLP sensor temperature tripYEL_ON_RED_ONHeatsink sensor errorYEL_ON_RED_ON_GRN_FLICKERDeice sensor error (open/short)YEL_ON_RED_ON_GRN_ONUnit overcurrent protection
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