Samsung WA48H7400AP Service Manual
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Samsung WA48H7400AP Service Manual

Top-loading type
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SERVICE
WASHING MACHINE (TOP-LOADING)
WASHING MACHINE
TOP-LOADING TYPE
Basic Name :
WA48H7400AP
(WA-7000HA PJT)
Basic Code :
WA45H7000AP/A2
Model Name :
WA50M7450AP
WA50M7450AW
(WA-7400M PJT)
Model Code :
WA50M7450AP/A4
WA50M7450AW/A4
Manual
1. Safety Instructions
2. Features and Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram
6. Wiring Diagram
7. Reference
CONTENTS

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  • Page 1 WASHING MACHINE TOP-LOADING TYPE Basic Name : WA48H7400AP (WA-7000HA PJT) Basic Code : WA45H7000AP/A2 Model Name : WA50M7450AP WA50M7450AW (WA-7400M PJT) Model Code : WA50M7450AP/A4 WA50M7450AW/A4 SERVICE Manual WASHING MACHINE (TOP-LOADING) CONTENTS 1. Safety Instructions 2. Features and Specifications 3. Disassembly and Reassembly 4.

  • Page 2: Table Of Contents

    CONTENTS 1. Safety instructions ..............1 1-1.

  • Page 3: Safety Instructions

    1. SAFETY INSTRUCTIONS 1-1. SAFETY INSTRUCTIONS FOR SERVICE ENGINEERS ► Be sure to observe the following instructions to operate the product correctly and safely to prevent possible accidents and hazards while servicing. ► Two types of safety symbols, Warning and Caution, are used in the safety instructions. Hazards or unsafe practices that may result in severe personal injury or death. WARNING Hazards or unsafe practices that may result in minor personal injury or property damage. CAUTION WARNING BEFORE SERVICING...
  • Page 4 WARNING WHILE SERVICING • Check if the power plug and outlet are damaged, flattened, cut or otherwise degraded. 4 If faulty, replace it immediately. Failing to do so may result in electric shock or fire. • Completely remove any dust or foreign material from the housing, wiring and connection parts. 4 This will prevent a risk of fire due to tracking and electrical hazard.. • When connecting wires, make sure to connect them using the relevant connectors and check that they are completely properly. 4 If tape is used instead of the connectors, it may cause fire due to tracking. • Make sure to discharge the PBA power terminals before starting the service. 4 Failing to do so may result in a high voltage electric shock. • When replacing the heater, make sure to fasten the nut after ensuring that it is inserted into the bracket-heater.
  • Page 5 CAUTION BEFORE SERVICING • Do not sprinkle water onto the washing machine directly when cleaning it. 4 This may result in electric shock or fire, and may shorten the product lifetime. • Do not place any containers with water on the washing machine. 4 If the water is spilled, it may result in electric shock or fire. This will also shorten the product lifetime. • Do not install the washing machine in a location exposed to snow or rain. 4 This may result in electric shock or fire, and shorten the product lifetime. • Do not press a control button using a sharp tool or object. 4 This may result in electric shock or damage to the product.
  • Page 6 CAUTION AFTER SERVICING • Check the assembled status of the parts. 4 Now is a good time to inspect your work. Review all connections and wiring, including mounting hardware. • Check the insulation resistance. 4 Disconnect the power cord from the power outlet and measure the insulation resistance between the power plug and the grounding wire of the washing machine. The value must be greater than 10MΩ when measured with a 500V DC Megger • Check whether the washing machine is level the floor with respect to the original position of the washing machine prior to service.

  • Page 7: Features And Specifications

    The power to handle anything! Our direct-drive inverter motor delivers power right to the washer tub from a variable speed, reversible motor. Beltless DD Motor direct-drive motor generates a higher spin speed for more effective, quiet operation. The washer also has fewer moving parts, meaning fewer repairs. • A separate nozzle has been adopted that sprays water equally so that the Mist Shower rinse cycle is effective even with a small amount of water. • This Samsung washer performs smoothly at top spin speeds, minimizing ® (Vibration Reduction Technology) noise and vibration. • Clean your drum with one button! This Pure Cycle is specially designed to Self Clean remove detergent residue & dirt bulid up in the tub, without the need for (Tub Cleaning cycle) special chemical detergents.

  • Page 8: Specifications

    2-2. SPECIFICATIONS TYPE TOP LOADING WASHER 43.9″ / 111.5cm A. Height 27.0″ / 68.6cm B. Width DIMENSION (Inches / cm) 58.1″ / 147.6cm C. Height with Door open 29.3″ / 74.4cm D. Depth WATER PRESSURE 20~116psi (137~800kPa) WEIGHT 64kg (141.1 lb) CAPACITY 5.0cu.ft WASHING 120V 700W POWER SPIN 120V 400W CONSUMPTION...

  • Page 9: Detail Features

    2-3. DETAIL FEATURES Grade WA50M7450A*/A4 WA48H7400AP/A2 Image Capacity(DOE) Aqua Jet Smart Care Diamond interior drum Self Clean Washing Cycles Main Spec. Internal Heater ® Pulsator material Max rpm 1,100 (Max spin speed) Mist Shower Motor Inox / Neat White Color Neat White Main display 18:88 18:88...

  • Page 10: Options Specifications

    2-4. OPTIONS SPECIFICATIONS Item Item Name Code No. Remark HANGER-HOSE DC61-00224A Default USER MANUAL DC68-03776E Default CABLE TIE 6501-000121 Default ASSY CAP V.W DC97-18313A Default Note • Customer can purchase Water supply, drain hoses and assy leg support from a service center. 8 _ Features and Specifications...

  • Page 11: Disassembly And Reassembly

    3. DISASSEMBLY AND REASSEMBLY 3-1. TOOLS FOR DISASSEMBLY AND REASSEMBLY Tool Type Remarks Tub(16), Fixer screw(5), Motor(1), Balance(5) 10mm Box driver Damper(2), Damper(friction 1) 17mm Replaced by box driver 10mm Double-ended spanner 17mm A Tool for protecting empty turning of bolt or abrasion from using box driver Vice pliers For disassembly of Spin drum Others (screwdriver, nipper, Common tools for servicing...

  • Page 12: Standard Disassembly Drawings

    3-2. STANDARD DISASSEMBLY DRAWINGS ► This is a standard disassembly diagram and may differ from the actual product. Use this material as a reference when disassembling and reassembling the product. Part Figure Description 1. Remove the 6 screws holding the control panel assembly. 2. Separate the both hooks. (Left and Right) 3. Separate the cover panel upward. If it is difficult to disassemble, use the (-) driver to disassemble hooks.
  • Page 13 Part Figure Description 1. After separating the control panel, separate the water-valve housing. 2. Remove the 3 fixing screws. Water Valve 3. Remove the wire-harness and release the 2 clamps connecting the hoses. When releasing the clamps, take care that you do not tear the hoses. Disassembly and Reassembly _ 11...
  • Page 14 Part Figure Description 1. Remove the 2 inlay tapes. Door Assembly 2. Remove the 4 screws holding the door lid TC and separate the door. 12 _ Disassembly and Reassembly...
  • Page 15 Part Figure Description 1. Remove the 2 screws from the cover plate. 2. Separate the control panel assembly. 3. Separate the Assy Valve Water, the main PBA, the Assy Sensor Pressure and the filter EMI housing. Separate the housing to prevent stress and damage to the wire- Top Cover Assembly harness. / Door Switch 4. Separate the main wire harness, the pressure switch hose clip , Grounding screw .
  • Page 16 Part Figure Description 1. Separate the back cover 2. Separate 2 clamps. 3. Remove the 13 screws in base. Drain-Pump 4. Remove the 3 screws 5 screws are separated by ‘+’ shape hand driver. Thermistor 1. Remove the 2 screws. 14 _ Disassembly and Reassembly...
  • Page 17 Part Figure Description 1. Separate the top cover assembly by lifting and pushing ahead the top part of the assembly 2. Remove the 2 screws holding the panel control Separate all the wires connected to the housing. 3. Remove the 4 screws fixing the tub- cover and separate the tub-cover. Clutch Assembly (continued) 4.
  • Page 18 Part Figure Description 6. Remove the shaft with the jig wrench. - Release the nut in a clockwise direction. - Fasten the nut in a counterclockwise direction. 7. Place the main body so that the front frame faces upward and remove the 4 bolts holding the saddle with a 10mm wrench.
  • Page 19 Part Figure Description 10. Separate the 2 marked housings and then remove the DD-motor. 11. Press the hook to separate the housing. Clutch Assembly (continued) 12. Separate the slide guide and the coupling by pulling them forward. Disassemble the coupling and the spring.
  • Page 20 Part Figure Description 13. Remove the all screws fixing the clutch assembly and then separate the clutch assembly. Reassembly procedures are in the reverse order of dissasembly procedures. 18 _ Disassembly and Reassembly...

  • Page 21: Troubleshooting

    4. TROUBLESHOOTING 4-1. ERROR MODES ► This is a washer integrated error mode. For detailed information, refer to the general repair scripts. Error Type For USA Causes Remarks The part of the hose where the water level sensor is located is damaged (punctured).
  • Page 22 Error Type For USA Causes Remarks Check the consumer’s power conditions. Make sure to check the operating voltage. Connect a tester to the internal power terminals during the Boil or Dry operations and observe the washing machine’s operation carefully. Power Error 9C1,9C2 Check the voltages.
  • Page 23 Error Type For USA Causes Remarks A switch contact error because of a deformation of the door When the door is not hook. opened after the door open operation. When the door is pulled by force. When the door is not This occurs in the Boil wash because the door is pushed due locked after the door to a pressure difference from internal temperature changes.
  • Page 24 Error Type For USA Causes Remarks Error detected in the Mems PBA or data error detected. Check the wire connections. Mems PBA Error Replace if necessary. Detected 1. Check the wire connections. 2. Replace the Mems PBA. 3. Main PBA wire connection error or PBA’s silver nano part malfunction.

  • Page 25: Corrective Actions For Each Error Code

    4-2. CORRECTIVE ACTIONS FOR EACH ERROR CODE Troubleshooting _ 23...
  • Page 26 24 _ Troubleshooting...
  • Page 27 Troubleshooting _ 25...
  • Page 28 26 _ Troubleshooting...

  • Page 29: The Installation For Leveling

    4-3. THE INSTALLATION FOR LEVELING Problem Type Causes Corrective Actions If the rear level of the floor is lower than • Only use the front legs to adjust the • Use the leg supports to adjust the level the front level of the floor, it can’t be level. of the rear. leveled. • If the floor is on a steeply slope, please use the additional leg supports. Front Rear •...

  • Page 30: Pcb Diagram

    5. PCB DIAGRAM 5-1. MAIN PCB ► This Document can not be used without Samsung’s authorization. Location Part No. Function Description Location Part No. Function Description Motor Control Control to Motor Switching IC Making a stable DC Main Relay Main Power Relay Trans Circuit Chopping the DC Link...

  • Page 31: Detailed Manual For Connector And Relay Terminal Part - Main Pcb

    5-2. DETAILED MANUAL FOR CONNECTOR AND RELAY TERMINAL PART - MAIN PCB ► This Document can not be used without Samsung’s authorization. ► CN4 ► CN5 1. Bleach Valve (WA456*) 1. Water Level 2. Rinse Valve 2. Standby 3. Hot Valve 3. TX 4. Cold Valve 4. RX 5.

  • Page 32: Sub Pcb

    5-3. SUB PCB ► This Document can not be used without Samsung’s authorization. Location Part No. Function Description Micom201 Control Function Control Key and LED Function Jog Dial Jog Dial SW601 Wash Communication CN802 Connect wash Main PBA Part Connecting Thermistor, cluch, Water Lavel and Mems Sensor CN501 Conecting Sensing Part LED Lamp Display Function BZ601 Buzzer...

  • Page 33: Detailed Manual For Connector Terminal Part - Sub Pcb

    5-4. DETAILED MANUAL FOR CONNECTOR TERMINAL PART - SUB PCB ► This Document can not be used without Samsung’s authorization. ► CN501 1. 3.3 2. SPC_1 ► CN802 3. SDI_1 1. CLUTH 4. SDO_1 2. WL_MAIN 5. GND 3. STANDBY 6. CS1_1 4. TX 7. GND 5. RX 8.

  • Page 34: Wiring Diagram

    6. WIRING DIAGRAM 6-1. WIRING DIAGRAM ► This Document can not be used without Samsung’s authorization. nREFERENCE INFORMATION BLACK BLUE GREEN GRAY NATURAL ORANGE PINK SKYBLU SKYBLUE VIOLET WHITE YELLOW 32 _ Wiring Diagram...

  • Page 35: Model Number Naming Rules

    7. REFERENCE 7-1. MODEL NUMBER NAMING RULES Reference _ 33...
  • Page 36 This Service Manual is a property of Samsung Electronics Co.,Ltd. © 2018 Samsung Electronics Co.,Ltd. All Any unauthorized use of Manual can be punished under applicable rights reserved. International and/or domestic law.

This manual is also suitable for:

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