27EnglishAppendixNo. Error Code Meaning Remarks18 E422 Blockage detected on high pressure pipe1. Check if the service valve is open2. Check for refrigerant leakage (pipeconnections, heat exchanger) and chargerefrigerant if necessary3. Check if there's any blockage on therefrigerant cycle (indoor unit/outdoor unit)4. Check if additional refrigerant has beenadded after pipe extension19 E425 Reverse phase or open phase Check whether 3 phase is reversed or opened.20 E440 Heating mode operation is stopped because the outdoortemperature is over 30 °C. HEATING21 E441 Cooling mode operation is stopped because the outdoortemperature is below the minimum operating temperature. COOLING22 E458 Fan speed error FAN1 ERROR23 E461 Error due to operation failure of inverter compressor -24 E462 System stop due to full current control -25 E463 Over current trip / PFC over current error Check OLP sensor26 E464 IPM Over Current(O.C) IPM27 E465 Comp. Over load error -28 E466 DC-Link voltage under/over error Check AC Power and DC Link Voltage29 E467 Error due to abnormal rotation of the compressor orunconnected wire of compressor Check Comp wire30 E468 Error on current sensor (Short or Open) Check Outdoor Inverter PBA.31 E469 Error on DC-Link voltage sensor (Short or Open) -32 E470 Outdoor unit EEPROM Read/Write error (Option) Check Outdoor EEPROM Data33 E471 Outdoor unit EEPROM Read/Write error (H/W) Check Outdoor EEPROM PBA34 E472 AC Line Zero Cross Signal out -35 E473 Comp Lock error -36 E474 Error on IPM Heat Sink sensor of inverter 1 (Short or Open) Check Outdoor Inverter PBA.37 E475 Error on inverter fan 2 FAN2 ERROR38 E484 PFC Overload (Over current) Error Check Outdoor Inverter PBA.39 E485 Error on input current sensor of inverter 1 (Short or Open) Check Outdoor EEPROM PBA40 E500 IPM over heat error on inverter 1 Check Outdoor Inverter PBA.41 E508 Smart install is not installed -42 E554 Gas leak detected Check the refrigerant43 E556 Error due to mismatching capacity of indoor and outdoor unit Check the indoor and outdoor unit capacity45 E590 Inverter EEPROM Checksum error -46 E660 Inverter Boot Code error -360_AC_Outdoor_AU_Eng_EN.indb 27 2016-09-20 오후 8:00:35