Samsung AC777MXAD7H series Installation Manual

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Samsung AC777MXAD7H series Installation Manual Manual pdf 30 page image

30AppendixEnglishAppendixAppendixTroubleshootingThe table below list the self-diagnostic routines. For some of error codes, you must contact an authorized servicecentre.If an error occurs during the operation, it is displayed on the outdoor unit PCB LED, both MAIN PCB and INVERTERPCB.No. Error Code Meaning Remarks1 E108 Error due to duplicated communication address Check on repeated indoor unit main address2 E121 Error on room temperature sensor of indoor unit (Shortor Open) Indoor unit Room Thermistor Open/Short3 E122 Error on EVA IN sensor of indoor unit (Short or Open) Indoor unit EVA_IN Thermistor Open/Short4 E123 Error on EVA OUT sensor of indoor unit (Short or Open) Indoor unit EVA_OUT Thermistor Open/Short5 E153 Error on float switch (2nd detection) Indoor unit Float Switch Open/Short Drain Pumpoperation Check6 E154 Indoor fan error Check on indoor unit indoor Fan operation7 E198 Error on thermal fuse of indoor unit (Open) Thermal Fuse Open Check of indoor unit Terminal Block8 E201Communication error between the indoor unit andoutdoor unit (Pre-tracking failure or when the actualnumber of indoor units are different from the indoor unitquantity setting on the outdoor unit)Error due to communication tracking failure after initialpower is supplied (The error occurs regardless of thenumber of units.)Check indoor quantity setting in outdoor9 E202Communication error between indoor unit and outdoorunit (When there is no response from indoor units aftertracking is completed)Check electrical connection and setting between indoorunit and outdoor unit10 E203Communication error between the outdoor unit andmain micom (For PF #4 to #6 controllers, error will bedetermined from the time when the compressor is turnedon.)Check electrical connection and setting betweenoutdoor unit MAIN PBA - INVERTER PBA11 E221 Error on outdoor temperature sensor (Short or Open) Check Outdoor sensor Open / Short12 E231 Error on outdoor COND OUT sensor (Short or Open) Check Cond-Out sensor Open / Short13 E251 Error on discharge temperature sensor of compressor 1(Short or Open) Check Discharge sensor Open / Short14 E320 Error on OLP sensor (Short or Open) Check OLP sensor Open / Short15 E403 Compressor down due to freeze protection control Check Outdoor Cond.16 E404 System stop due to overload protection control Check Comp. when it starts17 E416 System stop due to discharge temperature -18 E422 Blockage detected on high pressure pipe1. Check if the service valve is open2. Check for refrigerant leakage (pipe connections, heatexchanger) and charge refrigerant if necessary3. Check if there's any blockage on the refrigerantcycle (indoor unit/outdoor unit)4. Check if additional refrigerant has been added afterpipe extension19 E425 Reverse phase or open phase Check whether 3 phase is reversed or opened.20 E440 Heating operation restricted at outdoor temperature overTheat_high value (default:30°C)1. Check the range of temperature limited for heatingoperation2.Check the outdoor temperature sensor21 E441 Cooling operation restricted at outdoor temperaturebelow Tcool_low value (default:0°C)1. Check the range of temperature limited for coolingoperation2. Check the outdoor temperature sensor