Contents■ Product Specifications .......................................................................................... 41. The Feature of Product .................................................................................................................................. 41-1 Feature ............................................................................................................................................................................42. Product Specifications .................................................................................................................................10■ Disassembly and Reassembly ............................................................................12■ Refrigerant pipe installation ..............................................................................321. Examples of the correct refrigerant pipe installation for Heat Recovery ................................322. Examples of the incorrect refrigerant pipe installation for Heat Recovery ............................33■ Troubleshooting ..................................................................................................341. Error Display .....................................................................................................................................................342. Error Code .........................................................................................................................................................353. How to take measures for each symptom...........................................................................................383-1 Communication error between indoor andoutdoor units during tracking (Error Code : E201).................................................................................383-2 Communication error between indoor andoutdoor units after completing tracking (Error Code : E202) ...........................................................393-3 Communication error (1 minute) between Main andSub Micoms of an Outdoor unit or among Outdoor Units (Error Code : E203) .......................403-4 MCU branch part setup error– inconsecutive connection with the use of 2 branch parts .............................................................413-5 MCU branch part setup error– Repeated setup for the same address over 3 times ..........................................................................423-6 MCU branch part setup error– non-installed address setup .........................................................................................................................433-7 Communication error (1 minute) between Main andSub Micoms of an Outdoor unit or among Outdoor Units (Error Code : E203)...................................443-8 MCU branch part setup error– Overlapping Indoor unit Address setup .................................................................................................453-9 MCU branch part setup error– Set as being used without connection to an Indoor unit ..............................................................463-10 MCU branch part setup error– Connect an Indoor unit to a branch part not being used ..............................................................473-11 MCU branch part setup error– Connect more Indoor units than what is actually set up in MCU............................................................483-12 MCU/MCU subcooler entrance/exit sensor error (Open/Short) ......................................................493-13 Outdoor temperature sensor error(Open/Short)(Error Code : E221, E231, E251, E269, E276, E311 E321, E322, E323)..............................................503-14 High pressure temperature sensor error (Open/Short) (Error Code : E291)Low pressure temperature sensor error (Open/Short) (Error Code : E296)................................513-15 Compressor down by antifreeze control (Error Code: E403) .............................................................523-16 Comp. down due to a protective control of high pressure (Error Code : E407)........................533-17 Comp. down due to a protective control of low pressure (Error Code : E410) ..........................543-18 Comp. down due to a dischargetemperature sensor of a compressor (Error Code : E416) ..................................................................553-19 Reverse phase detection error (3Phase outdoor unit) (Error Code : E425) .................................563-20 ESC EEV open error (Error Code : E438)........................................................................................................573-21 Refrigerant leakage error (Error Code : E439)............................................................................................583-22 Prohibition of the compressor operation due to outdoor temperature(Error Code : E440, 441) ......................................................................................................................................593-23 Refrigerant leakage error (during operation) (Error Code : E443) ...................................................593-24 Outdoor unit fan error (Error Code : E458, 475 ) ......................................................................................60