User manual LG LRSC21935SB

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[. . . ] 12 Construction Views Outdoor Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Construction Views Indoor Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Refrigerant Piping Systematic Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] No Yes Replace both the PMVs. Is the cooling bypass PMV B normal ?Yes No Cooling bypass PMV B error Are the resistance characteristics of TD1 sensor normal ?Yes No Replace TD1 sensor. Is the wiring correct ?Yes No Set normal wiring. (Check miswiring of the outdoor unit according to miswiring check function. ) Insufficient refrigerant, blockage, pipe breakage. 14 Check code [AF] Outdoor unit power source phase order miswiring Operation cause Abnormal power phase order or missing phase of power supply to the outdoor unit There is an abnormal power phase order or missing phase of power supply to the outdoor unit. Check power supply wiring. 101 Troubleshooting Diagnostic procedure for check code Check code [b4] Low pressure sensor (Ps) short circuit Operation cause 1. Compressor error Are Pd sensor/Ps sensor correctly connected ?sensor: CN501 [ Pd sensor: CN500 ] Ps Are the output voltage characteristics of Ps sensor normal ?Yes No Sensor error Is the low pressure below 0. 95MPa during operation of compressor ?Yes No Check compressor. Check interface PC board. Check code [b5] External input display fault [b6] External interlock display fault Is the external device connected to connector CN17 ?Indoor PC board error Check indoor PC board. If defective, replace. 14 Is the external device operating normally ?Incorrect set-up of master outdoor unit 3. Defective outdoor interface PC board Are there multiple inverter outdoor units connected ?No Yes Set only one inverter outdoor unit per system. Is set-up of the master outdoor units position duplicated ?[Set SW08 bit 2 on interface PC board of each unit. (*1)] Yes Set only one unit as master, turn off all power source, and then restart the operation. No Check interface PC board. ( *1) Set-up of outdoor unit at center position (SW08 bit 2 set-up on outdoor interface PC board) OFF: Slave/ON: Master (Automatic set-up for inverter outdoor unit). 14 106 Troubleshooting Diagnostic procedure for check code Check code [d2] Slave outdoor unit alarm Operation cause Defective slave outdoor unit An error occurs in the slave outdoor unit. Confirm the check code of the slave unit, and check it according to the diagnostic procedure for each check code. Check code [d3] TH sensor alarm Operation cause Error of temp. sensor incorporated in IGBT (Inverter Gate Bi-Polar Transistor) There is an error with the temp. Check connectors CN07 on IPDU PC board and CN600 on interface PC board. If there is no problem, replace IPDU PC board. Check code [d4] Oil temp. (TK1) sensor alarm Operation cause TK1 sensor open/short Open/short of TK1 was detected. Check connection (TK1 sensor: CN516) and resistance value characteristics of the sensor. If sensor is normal, replace the outdoor interface PC board. Check code [d5] Oil temp. [. . . ] SENSOR - LIQUID (TC2) TRANSFORMER (MMS) TERMINAL BLOCK `ABC PQ E' TERMINAL BLOCK `E-L-N' PCB CONTROL (CM**CO2) PCB POWER (P**RC01) PRESSURE SENSOR (Service) PULSE MOTOR VALVE - COIL DRAIN CATCH ASSEMBLY DRAIN HOSE OWNER'S MANUAL N028 N042 N056 1 N080 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 12 13 14 15 16 17 18 19 20 21 22 23 24 20 165 Exploded views and service parts Indoor units Low Wall MM-S056, MM-SR056, MM-S080, MM-SR080 38 37 40 34 36 4 22 8 24 29 35 41 46 39 32 31 30 23 25 15 33 10 42 27 28 3 17 13 18 26 44/45 19 16 1 5 14 43 7 6 12 21 20 11 9 2 Ref. 01 02 03 04 05 06 07 08 08 09 10 11 12 13 14 15 16 17 17 18 19 20 21 43107214 43A50006 43107216 43107223 43107222 43109321 43109322 43109324 43109320 43109329 43119373 43119393 43119394 43120172 43A21005 43125131 43125142 43125143 43125141 43126127 43126128 43A39004 43A39005 43A44080 43A44081 43155101 43155138 Description HINGE TEMP. SENSOR CLIP (TC) SPRING SHAFT GRILLE LEFT SHAFT GRILLE RIGHT INLET GRILLE (LARGE) INLET GRILLE (SMALL) LOUVRE LOUVRE VERTICAL GRILLE BOLT COVER SHAFT HOLDER LEVER MULTI-BLADE FAN FAN MOTOR BEARING COUPLING SHAFT SS SHAFT SS FAN CASE, LOWER FAN CASE, UPPER CONNET BAR CONNET BAR REFRIGERATION ASSEMBLY REFRIGERATION ASSEMBLY MF CAPACITOR MF CAPACITOR S056 6 2 1 1 1 SR056 S080 6 2 1 1 1 6 2 1 1 1 1 SR080 Ref. 6 2 1 1 1 1 2 24 25 25 26 27 28 29 30 43A70007 43A72002 43A72003 43179107 43180284 43180283 43A88013 43A50023 43A50019 43A50020 43102624 43102625 43117812 43A58004 43A60025 43A60012 43A69025 43A69024 43A49009 43A46037 43A69012 43A91046 43A91047 43A91044 43A91041 43A91052 43A91053 Description HOSE ASSEMBLY DRAIN PAN ASSEMBLY DRAIN PAN ASSEMBLY PLUG AIR FILTER - LARGE AIR FILTER - SMALL OWNER'S MANUAL TEMP. [. . . ]

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