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LG RC9055*P*Z Service Manual

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HEAT PUMP DRYER
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLE
CORRECTLY BEFORE OFFERING SERVICE.
MODEL : RC9055*P*Z (RH9051WH)
RC8055*P*Z (RH8051WH)
RC7055*P*Z (RH7050WH)

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  Summary of Contents for LG RC9055*P*Z

  • Page 1 HEAT PUMP DRYER SERVICE MANUAL CAUTION READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLE CORRECTLY BEFORE OFFERING SERVICE. MODEL : RC9055*P*Z (RH9051WH) RC8055*P*Z (RH8051WH) RC7055*P*Z (RH7050WH)
  • Page 2 IMPOR TANT SAFETY NOTICE The information in this service maual is intended for use by individuals possessing adequate backgrounds of electrical, electronic, and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.
  • Page 3: Table Of Contents

    CONTENTS 1.SPECIFICATIONS ....................... 4 2.FEATURES AND LOOK ....................... 5 3.PART IDENTIFICATION ......................6 4.PROGRAM CYCLE ......................7 5.INSTALLATION INSTRUCTIONS ..................10 6.MAINTENANCE INSTRUCTIONS ..................13 7.COMPONENT TESTING TIPS .................... 15 8.WIRING DIAGRAM ......................18 9.TROUBLESHOOTING ....................... 19 10. DIAGNOSTIC TEST......................24 11.
  • Page 4: Specifications

    SPECIFICATIONS RC9055*P*Z / RC8055*P*Z / RC7055*P*Z ITEMS REMARK RH9051WH / RH8051WH / RH7050WH Condensation DRYING TYPE Opaque : 56kg (Gross : 61kg) WEIGHT Glass : 57kg (Gross : 62kg) 600(W) x 640(D) x 850(H) DIMENSION 9.0kg / 8.0kg / 7.0kg...
  • Page 5: Features And Look

    FEATURES AND LOOK Ultra big Capacity Drum The ultra big 9.0kg capacity drum on this LG dryer allows you to dry more washing at once, saving time! Lower Energy Consumption Energy LG Heat pump dryers use less energy than conventional dryers due to optimized heat exechanger and auto cleaning technology.
  • Page 6: Part Identification

    PART IDENTIFICATION Product Layout RC*055*PZ / RC*055*P2Z / RC*055*P3Z RC*055*P1Z / RH7050WH RH9051WH / RH8051WH Control Panel Water Container Glass Door Opaque Door Air Ventilation Grill Accessory parts 1. Drain Hose Assembly ( Purchased Seperately ) 2. Dryer Rack Assembly P/No.
  • Page 7: Program Cycle

    PROGRAM CYCLE Time Delay Option You can use the Time Delay option to delay Hand Iron the finishing time of drying cycle. Maximum This function remains more moist than the Time Delay is 19 hours. condition for ironing. Minimum Time Delay is 3 hours. 1.
  • Page 8: Cycle Selection Table

    PROGRAM CYCLE Cycle Selection Table Sensor Dry Cycle Drying Level Cycle Laundry Type Detail Towels, dressing gowns and bed For thick and quilted fabrics Extra linen For thick and quilted fabrics that do not need to be Terry towels, tea towels, towels Very ironed and bed linen...
  • Page 9 PROGRAM CYCLE...
  • Page 10: Installation Instructions

    INSTALLATION INSTRUCTIONS Level the Dryer Leveling the dryer prevents unnecessary noise and vibration. Place your dryer on a solid, level floor. Leveling the dryer prevents unnecessary noise and vibration. Place your dryer on a solid, level floor. If the dryer is not properly level, adjust the front levelling feet as necessary.
  • Page 11: Stacking Kit

    INSTALLATION INSTRUCTIONS Stacking Kit WARNING In order to stack this dryer an LG stacking kit is required. • Incorrect installation can cause serious accidents. • The weight of the dryer and the height of installation makes the stacking procedure Dryer too risky for one person.
  • Page 12 INSTALLATION INSTRUCTIONS...
  • Page 13: Maintenance Instructions

    MAINTENANCE INSTRUCTIONS Ventilation Grille and Cool Air 3. Connect drain hose Inlet Grille to the kit. Vacuum the front ventilation grille 3-4 times a year to make sure there is no build up of lint or dirt that may cause improper air flow. Moisture Sensor? The device senses the moisture level of the laundry during operation, which means it must...
  • Page 14 MAINTENANCE INSTRUCTIONS AUTION Power cord must be unplugged before this work to avoid danger of electric shock. The bulb itself could be very hot when the dryer just finishes its operation. So before changing the bulb, be sure that the inside of the drum is cool down.
  • Page 15: Component Testing Tips

    COMPONENT TESTING TIPS POWER SUPPLY A 230V : 8.5 (-3%/+7%) ㎌± ㎌...
  • Page 16 COMPONENT TESTING TIPS Component Test procedure Check result Remark 7. Door S/W Measure resistance of the The state that Following terminal knob is Pressed is 1) Door switch knob : open opposite to open condition Terminal : “COM”- “NC” Resistance value < 1Ω (1-3) Terminal : “COM”- “NO”...
  • Page 17 COMPONENT TESTING TIPS 13.Steam generator Measure resistance of the Terminal to terminal Measure resistance of the 14. Inlet. valve Following terminal Left picture -.plate 15.Convert.valve Measure resistance of the Following terminal White housing -.2 wire (Two of five colors) 16.LID switch Measure resistance of the Following terminal Blue housing...
  • Page 18: Wiring Diagram

    WIRING DIAGRAM...
  • Page 19: Troubleshooting

    TROUBLESHOOTING ressing the CHECKING CHECKING DIS LAY "START/ AUSE"button ACTION OINTS Check the below 1. All LED Lamp On 2. Display data in LED window None Electric control. ①1:HH ②18:d1(19:d1) ③1U:20 [ Main Version ::20 ] ④1d:09 [ Display Version ::09 ] Check the Motor operating conditions Check the below and ower Consumption.
  • Page 20 TROUBLESHOOTING...
  • Page 21 TROUBLESHOOTING Error Mode...
  • Page 22: Error Mode

    TROUBLESHOOTING Error Mode Display symptom Check point 1) Connector → not assembled?- Open Check weather connector in connected correct or not? 2) If the covering has been peeled away or touch? - Short -.Fire detection of drum through If the penetration of water? - Short low thermistor temp detecting.
  • Page 23 TROUBLESHOOTING Power-On Press Power button LED–Segment Plugged in Power button Lock:No buzzer Press Start/Pause button Circuit breaker trip Drum not Low voltage Roating Start button Lock: Low temperature : No buzzer Harness Wire broken Door Open? See the Page 24 Door is not closed LED broken, check list...
  • Page 24: Diagnostic Test

    DIAGNOSTIC TEST Test 1 : ELECTRIC SUPPLY & CONTROL CHECK Trouble Symptom : No power to the dryer or the controller Measurement condition : Power is on. Caution] Electric shock. Please test after grounding check. Power voltage is within • Check the standard range - Circuit breaker (AC 215V~245V)?
  • Page 25 DIAGNOSTIC TEST Test 2 DOOR SWITCH / LAMP CHECK Trouble Symptom : Malfunction of lamp operation and door switch No operation of pump motor Displays “ ” in case of the door closed. The door must be closed and start. Measurement condition : Check if they are working while being connected to power supply.
  • Page 26 DIAGNOSTIC TEST Test 3 Motor check Trouble Symptom : Motor malfunction, Occurrence of the “Clean filter” repeatedly Measurement condition : • Power cord is unpluged. • Door is closed. • Check the user condition. - Put overload into drum? - Normally Input Voltage and Hertz? •...
  • Page 27 DIAGNOSTIC TEST Trouble Symptom : Motor malfunction, ventilation error Test 4 Heater check Trouble Symptom : Heater is not working. Drying failure. The designated temperature is not reached. Measurement condition : Power cord is unplugged. • Check the heater resistance. •...
  • Page 28 DIAGNOSTIC TEST Test 5 Pump check Trouble Symptom : LED display show " OE " signals. Measurement condition : Power cord is unplugged. Check the hose blocked with foreign body or kinked. (Measure with power on) • Disassemble Pump On LQC test mode, when - Check foreign objects - Check impeller Pump is on,...
  • Page 29 DIAGNOSTIC TEST Test 6 Thermister check Trouble Symptom : Poor drying performance(over-drying or no drying). Abnormal thermistor operation. Measurement condition : Power cord is unplugged. • Check and replace With White9,White 6 disconnected from thermistor. Controller, check 1) Check disconnected 1) High temperature thermistor ( Wire Housing or severed color : White) White 6 pin...
  • Page 30 DIAGNOSTIC TEST AIJ % ith hite 9 disconnected from controller, hite 9 pin ③ - White 9 pin ⑨ Resistance is unlimited? ③ : Green wire ⑨ : Orange wire ith metal tape attached to sensor tips, hite 9pin ③ hite 9pin ⑨...
  • Page 31 DIAGNOSTIC TEST Test 8 Check if they are working while being connected to power supply. Is the product leveled? Leg leveling (Check shaking / tilt ) (Refer to how to adjust leveling, Page 10 ) Improve dryer installation environment. ( Refer to installation environment, Page 10~12 ) Is it installed to Built In / Under environment?
  • Page 32 DIAGNOSTIC TEST Test 9 * Standard Time: Eco Mode → Over 225min, Speed: Over 180min * Drying Condition: Cotton-Cupboard, 9kg Cotton Clothes, Spin rpm: Over 1,000rpm Measurement condition : Check if they are working while being connected to power supply. Is the product leveled? (Check shaking / tilt ) Leg leveling (Refer to how to leveling, Page 10)
  • Page 33 DIAGNOSTIC TEST Test 10 Measurement condition : Check if they are working when connected to power supply. Is the product leveled? Adjust product leveling (Check shaking / tilt ) (Refer to how to leveling, Page 10) Adjust pipe position to insure minimum 2) After Comp on, check corresponding 5mm gap with pipe or mold ta ~ ta~ ta~ sound)
  • Page 34 DIAGNOSTIC TEST Test 11 3. Convert LCD Display to Data View Mode. 4. After Start, when the first Pumping is completed, put 1/3 water in Drawer, and pour around Dispenser water discharge hole slowly until "Sump W" value becomes "001" among Data View categories.
  • Page 35 DIAGNOSTIC TEST Reference picture Picture A Picture B Picture C Picture D Picture E Picture F...
  • Page 36 DIAGNOSTIC TEST PCB Layout (Main) PCB POWER Compressor Display Power Motor Door SW BLDC Pump SUMP SENSING(No 1,4) HIGH THERMISTOR(No 2,3) COMP THERMISTOR(No 2,6) EVA INLET THERMISTOR(No 2,5) 5V(No 2) GROUND BL(8PIN) WH(11PIN) WH(9PIN) Control Valve (No 2,3,4,5) DOOR LAMP (No 1,2) LEV (No 6,7,8,9) MAIN TO DISPLAY FILTER SENSING (No 3,4)
  • Page 37: Disassemble Instructions

    DISASSEMBLE INSTRUCTIONS CAUTION To reduce the risk of personal injury, adhere to all industry recommended safety procedures including the use of long sleeved gloves and safety glasses. Failure to follow all of the safety warnings in this manual could result in property damage, personal injury or death.
  • Page 38 DISASSEMBLE INSTRUCTIONS 4. Disassemble the lower cover by pulling to the front. DRAWER 5. Disassemble cabinet by unscrewing 2 at the top and 3 at the rear (Left and right are the same). CABINET 6. Disassemble panel frame by unscrewing PANEL FRAME 4 at the front.
  • Page 39 DISASSEMBLE INSTRUCTIONS 7-1. Disassemle the door by releasing the 2 screws. 7-2. Disassemble the door switch. 7-3. Disassemble the cabinet cover by releasing the 10 screws. 7-4. Disassemble the Door Switch. 7-5. Disassemble the cover, cabinet. DOOR CABINET COVER DOOR SWITCH 8-1.
  • Page 40 DISASSEMBLE INSTRUCTIONS 10. Disassembling the side frame by releasing 4 screws 11. Disassemble the housing of motor, compressor, heater and thermistor. Heater thermistor (WH Small 2pin) Heater housing (WH Big 2pin) Motor housing (WH 3pin) Compressor housing (BLUE 3pin) 12. Releasing the dispenser by unscrewing DISPENSER 1 screw.
  • Page 41 DISASSEMBLE INSTRUCTIONS 1.Disassemble the hose. -.Check Hose 2.Remove the hose. -.Hose (Check holder -.Hose Note If hoses are not properly connected, there is a risk of leak.
  • Page 42 DISASSEMBLE INSTRUCTIONS 13-1. Disassemble the duct by releasing the 7 screws. 13-2. Release the drum nut using tool. 13-3. Disassemble the air guide by releasing the 1 screw. AIR GUIDE DUCT 14-1. Disassemble the COVER REAR by releasing the 2 screws. 14-2.
  • Page 43: Exploded View

    EXPLODED VIEW Control Panel & Top plate Assembly A100 A190 A180 A160 A114 A200 A113 A111 A112 A120 A150 A130 A110...
  • Page 44 EXPLODED VIEW Cabinet Cover & Door Assembly Transparent door B103 B100 Opaque round door B107 B103 B100 B109 B106 B102 B101 B107 B109 B103 B106 B100 B102 B107 B109 B106 Black tint door B102 B101 Note Note If you want to replace the B150 part(Locker Assembly), If you want to exchange Check out the product manufacture date on the rating label.
  • Page 45 EXPLODED VIEW Base & Motor Assembly C360 C312 C313 C311 C319 C350 C316 C314 C317 C318 C315 C251 C310 C360 C147 C291 C600 C290 C143 C250 C145 C253 C148 C252 C146 C142 C230 C140 C150 C240 C241 C165 C160 C240 C230 C361 C200...
  • Page 46 EXPLODED VIEW Back Cover & Drum Assembly D120 D128 D100 D122 D121 D110 C360 D150 D180 D156 D157 D210 D158 D170 D200 D130 D152 D151 D157 D173...
  • Page 47 Service Bulletin WASHING MACHINE Bulletin Number:------------ •Subject: 1. How to SVC when “Empty water” is displayed even though Water container is emptied. 2. How to SVC when “Clean filter” is displayed even though Lint filter is cleaned. Bulletin Registration Date: 07/04/2014 Effective from Date: 07/04/2014...
  • Page 48 Service Bulletin WASHING MACHINE Bulletin Number:------------ Change Point P/no How to Part Action (location No) 383EEL3003C Pump cover Replacement (C252) ADQ55998604 Lint filer Replacement (B121) AJU73292501 Control valve Clean By water (C313) Evaporator& Clean By water Base lint and brush...
  • Page 49 Service Bulletin WASHING MACHINE Bulletin Number:------------ Replace “Pump Cover” (1/2) 1. Disassemble Base ASM SVC Number: C252 2. Disassemble Pump Assembly. Screw 4ea...
  • Page 50 Service Bulletin WASHING MACHINE Bulletin Number:------------ Replace “Pump cover” (2/2) 3. Reassemble the Pump Assembly 1) Check if rubber ring 2) Put the Drain motor is attached. on the New Pump cover. 3) Press down the 4) Turn the Drain motor Drain motor.
  • Page 51 Service Bulletin WASHING MACHINE Bulletin Number:------------ Replace “Lint filter” 1. Change point : Added “Rib” for minimizing the inflow lint into the “Evaporator” through the gap between filter and cabinet. Add Rib 2. Improvement SVC Number: B121...
  • Page 52 Service Bulletin WASHING MACHINE Bulletin Number:------------ Clean the “Control valve” 1. Disassemble the dryer. (Base Assembly) 2. Disassemble the “Control valve” 1) Disassemble hose(5ea) 2) Disassemble screw and housing. 3. Clean the “Control valve”...
  • Page 53 Service Bulletin WASHING MACHINE Bulletin Number:------------ Clean the Evaporator and Base lint by water. 1) Wash by water and brush. 2) Be careful electric parts by splash water. 3) Clean the Base under the Evaporator by water. Sample picture.
  • Page 54 Service Bulletin WASHING MACHINE Bulletin Number:------------ 4) Part Usage: Old part New part Old unit New unit ) Destroy Old Parts: ) SVC Bulletin History: Prior Bulletin Number: Date: Content: Bulletins:...
  • Page 55 P/No.: 3828EL9001Y AUGUST. 2011 PRINTED IN KOREA...

This manual is also suitable for:

Rc8055*p*zRc7055*p*z