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Toshiba DWS-22A Series Service Manual

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DISHWASHER
SERVICE MANUAL
Model:
DWS-22AXX(WQP4-T2601C)
This manual is intend to guide after sale service,
please read the manual careful before service.

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  Summary of Contents for Toshiba DWS-22A Series

  • Page 1 DISHWASHER SERVICE MANUAL Model: DWS-22AXX(WQP4-T2601C) This manual is intend to guide after sale service, please read the manual careful before service.
  • Page 2 SAFETY INSTRUCTIONS All instructions described should be carefull y read and followed. These instructions are precautions to prevent the risks of serious injury or death of the user, and any damages to property. WARNING indicates high possibility of serious injury (*1) or death of the user.
  • Page 3 Disconnect power plug Do not connect or disconnect the power plug by wet hand. No touch This may cause electric shock or fault and cause injuries. by wet hand Do not use damaged power lines, power plug or loose power socket. Electric shock Do not damage power line.
  • Page 4 Insert the power plug securely to the base and let the cord go downward. Insert plug or heat generation. Do not operate by putting easily combustible items such as towels and cloth inside the cabinet of the dishwa er. Prohibit Do not place anything on the main unit containers of water or hot water, heat appliances, glasses...
  • Page 5 Caution No pulling No use plastic utensils without washing ment climbing power plug Care about the door scald. Care for Care for cleaning Attention...
  • Page 6 Loading capacity Prohibit to pinching Prohibit hit or tap the dishwasher . Do not Prohibit Prohibit due to clogging the dishwasher. Prohibit...
  • Page 7: Table Of Contents

    Contents Specification..........2 Water flow diagram........4 Operating principle........5 Component location views ......6 Replaceable Parts........9 Water tank..........10 Door Assembly..........12 Door Switch Assembly.......14 Indicator Lamp..........16 Fan Aseembly...........17 Filter............18 Base Cover..........19 PCB ............20 Inlet valve ..........24 Drain pump..........26 Heater .............28 Washing pump..........29 NTC............31 Flowmeter..........33 Explore view of the product....
  • Page 8 Contents Work process detail chart......38 Work flow timing chart........39 Washing program........46 Test program ..........47 Error code ..........48 Trouble shooting flow logic chart....49 Schematics and Wiring Diagrams....54 There is a program named “Steam Wash”. This is the best washing performance. For the first 5 minutes, the product generates steam to soften the stains&dirt and make it easily to remove.
  • Page 9 420mm 435mm 435mm 750mm Model WQP4-T2601C Dimension (mm) AC 220V 50Hz 730 W 0.47 kwh IPX1 Washing capacity 16 Kg Cross weight 13 Kg...
  • Page 10 IMPORTANT SAFETY NOTICE The information in this service guide 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 it’s use.
  • Page 11: Water Flow Diagram

    Water flow diagram Water Water tank Inlet water route Inlet hose (Optional) Drain water route Cycle water route Drain hose Inlet valve Washing pump Drain pump...
  • Page 12: Operating Principle

    Operating principle Inlet water Out door Basket Water tank steam outlet Control panel Heater washing pump Inlet water Water flow hot wet air cool air Air flow...
  • Page 13: Component Location Views

    Component Location Views Interior View Indicator Lamp Under Spray Arm Upper Spray Arm Filter Assembly...
  • Page 14 Component Location Views Back view Note: The view that removes back shell Water Tank Filter Right view Note: The view that removes right shell Left view Note: The view that removes Left shell...
  • Page 15 Component Location Views Bottom view Note: loose the screw to remove the base cover. PCB Box Water Inlet Valve Water Pump Assembly Drain Pump Heating Element Thermistor...
  • Page 16: Replaceable Parts

    Replaceable Parts water tank Door Assembly Door Switch Assembly Indicator Lamp Fan Assembly Filter Base Cover Heater Element Water Inlet Valve Drain Pump Flow Meter Washing Pump...
  • Page 17 Part name Water tank The water tank stores water and provides water for the washing of Funtion machine. Steps of Disassemble 2. Open the door. 1. Disconnect the power 3. Remove 2 screws in the supply to the dishwasher. top of interior. 4.
  • Page 18 Part name Water tank The water tank stores water and provides water for the washing of Funtion machine. Steps of Disassemble 11. Disconnect 1 wire harness. 13. Water tank is got down. 12. Remove 2 screws.
  • Page 19 Part name Door Assembly The door assembly consists of inner door ,outer door and control Funtion panel. Steps of Disassemble 1. Disconnect the power supply to the 2. Remove 2 slides. dishwasher, and then open the door. 3. Remove 4 screws. 4.
  • Page 20 Part name Door Assembly The door assembly consists of inner door ,outer door and control Funtion panel. Steps of Disassemble 7. Replace the door assembly ,rewiring the data wire to the main board recover all parts as the reverse steps. WARNING: The door assembly is made by professional equipment, the components in the door assembly can not be replace separately.
  • Page 21 Part name Door Switch Assembly The door switch is used to locking or unlocking door assembly. Funtion Steps of Disassemble 1. Disconnect the power supply to the dishwasher. 2. Disconnect the 2 wiring harnesses from the door switch(mark 1). 3. Remove 2 screws(mark 2).
  • Page 22 Part name Door Switch Assembly Funtion The door switch is used to locking or unlocking door assembly. The defeat point The microswitch broken,only the power button can work,other button can not work. Check electric part 1. Open the protecting box and take out the PCB( see the section “Part Name PCB”) 2.
  • Page 23 Part name Indicator Lamp The lamp is lit when the door opened. Funtion Steps of Disassemble 1. Disconnect the power supply to the dishwasher. 2. Disconnect the wiring harnesses(mark 1). 3. Unscrew the nut(mark 2).
  • Page 24 Part name Fan Assembly Fan assembly is mounted on the right side of the tub. Its purpose is to provide Funtion swind for the dishwasher increase the effect of drying. Steps of Disassemble 1. Disconnect the power supply to the dishwasher and remove light shell.
  • Page 25 Part name Filter Funtion Filter can eliminate interference signal to make the machine work properly. Steps of Disassemble 1. Disconnect the power supply to the dishwasher and remove shells. 2. Disconnect 6 wiring harnesses. 3. Remove filter upward.
  • Page 26 Part name Base Cover The Base cover is used to protect the bottom of dishwasher and judge whether Funtion overflowing or not. Steps of Disassemble 1. Disconnect the power supply 2、Inverse the dishwasher and to the dishwasher, and then remove 1 screw. remove water tank.
  • Page 27: Pcb

    Part name Printed Circuit Board is the control center of dishwasher, which receive and process Funtion signal from components, send order to components and deal with the feedback information, etc. Steps of Disassemble 1.Disconnect the power supply to t 2. Remove the snap-fit. he dishwasher, and then remove bottom cover.
  • Page 28 Part name Printed Circuit Board is the control center of dishwasher, which receive and process Funtion signal from components, send order to components and deal with the feedback information, etc. Technical Data Description Code Designation DOOR Door Switch ACL: Live Door Switch ACN: Neutrons Temperature sensor(NTC)
  • Page 29 Part name Water Inlet Valve The inlet valve is electromagnetic valve that decide whether water enter or not. Valves are normally closed. Each time the appliance requires water, the controller will convey an electric signal to the coils to open the valve. Funtion The inlet valve consists of electric coil, valve body, valve pole, filter etc.
  • Page 30 Part name Water Inlet Valve The inlet valve is electromagnetic valve that decide whether water enter or not. Valves are Funtion normally closed. Each time the appliance requires water, the controller will convey an electric signal to the coils to open the valve. The inlet valve consists of electric coil, valve body, valve pole, filter etc.
  • Page 31: Drain Pump

    Part name Drain Pump Drain pump consists of electrical motor, impeller, inlet and outlet. Drain pump is a kind of pump driven by permanent magnet synchronous motor. The Funtion rotor is made with permanent magnet material, the running inertia of rotor is very small, the stator consist of silicon steel stack and coil.
  • Page 32 Part name Drain Pump Drain pump consists of electrical motor, impeller, inlet and outlet. Drain pump is a kind of pump driven by permanent magnet synchronous motor. The Funtion motor is made with permanent magnet material, the running inertia of rotor is very small, the stator consist of silicon steel stack and coil.
  • Page 33: Heater

    Part name Heater Element Funtion The heating element maintains water temperature during the wash. Steps of Disassemble 1. Disconnect the power supply to the dishwasher and then remove bottom cover. 2. Disconnect 3 wiring harnesses (mark 1). 3. Loosen 3 screws (mark 2). Technical Data Nominal voltage AC 220-240V...
  • Page 34: Washing Pump

    Part name Washing Pump The softener is designed to remove minerals and salts from the water, which would Funtion have a detrimental or adverse effect on the operation of the appliance. Steps of Disassemble 1.Disconnect the power, and then remove bottom cover. 2.
  • Page 35 Part name Washing Pump The softener is designed to remove minerals and salts from the water, which would Funtion have a detrimental or adverse effect on the operation of the appliance. Check the electric part 1.Open the control panel and take out PCB(see the section“Part Name PCB”); 2.With the door closed, unplug the CON1 and CON2, then use the multi-meter Ω...
  • Page 36: Ntc

    Part name Negative Temperature Coefficient Thermistor is integrated into sump, Funtion which is used for measuring temperature of water in the tub. Steps of Disassemble 1. Disconnect the power supply to the dishwasher and then remove bottom cover. 2. Disconnect the wiring harness (mark 1). 3.
  • Page 37 Part name Negative Temperature Coefficient Thermistor is integrated into sump, Funtion which is used for measuring temperature of water in the tub. Inspect NTC 1.Open the protecting box and take out PCB(see the section“Part Name PCB”); 2.With the door closed,unplug the RE connector(shown in below picture), then use the multi-meter Ω...
  • Page 38: Flowmeter

    Part name Flowmeter Flowmeter is integrated into Air Breaker. Function of flowmwter is measure how much water has entered in appliance. it consists of impeller, tongue tube and terminal, etc. Funtion When water pass through the flowmeter, moving water can rotate magnetic impeller, the tongue tube can sense the impeller’s magnetic and send electronic pulses.
  • Page 39 Part name Flowmeter Flowmeter is integrated into water tank. Function of flowmwter is measure how much water has entered in appliance. it consists of impeller, tongue tube and terminal, etc. Funtion When water pass through the flowmeter, moving water can rotate magnetic impeller, the tongue tube can sense the impeller’s magnetic and send electronic pulses.
  • Page 40 10-1 10-2 10-3 Door assembly: WARNING: The door assembly is made by professional equipment, the components (marked with red square) in the door assembly can not be replace separately.
  • Page 41 39-1 39-2...
  • Page 42: Part List

    Part List Part Code Part Name Qty. Part Code Part Name Qty. 12176000022611 Add Water Cap 12976000004764 Basket Assembly 12176000025190 Plastic Nut 11203602000355 Filter 12176000022869 Upper Shell 12176000022705 Spray Arm Assembly 12176000022610 Left Shell 12176000025733 Lampstand 12176000A49853 Door Assembly-DWS-22AVN(K) 12276000012845 Extension Hanger 12176000A49929 Door Assembly-DWS-22AVN(D) 12276000012550 Left Hinge Holeder...
  • Page 43: Work Process Detail Chart

    Work Process Detail Chart Working Parts long time no fullfilled signal,"EF" error Inlet Valve Outlet Valve Booster Pump Flow Meter no signal ,"E1" Error Steam Ganerator no Heat, "E3" error at the end Heater none washing, "E3" error Wash pump Pressure Switch Drain Pump none Drain, high water level , maybe leakage, "E4"...
  • Page 44: Work Flow Timing Chart

    Work flow timing chart :Intensive Phenomenon exist or not countdown NO. Phase Step Parameter Normal Abnormal Inlet water Detected signal bee bee alarm "EF" error Drain 10S# Discharge water 0.2L* Drain Discharge water 0.2L Drain Discharge water 1.5L water in tub "E1"...
  • Page 45 W ork flow tim ing chart :Intensive Phenom enon ex is t or not c ountdow n N O . Phas e Step Param eter N orm al Abnorm al D rain Rins e Static D rain Static 300S fan ac tiv e fan static D ry D rain...
  • Page 46 Work flow timing chart :Rapid exist or not countdown Phenomenon NO. Phase Step Parameter Normal Abnormal Detected buoy Inlet water bee bee alarm "EF" error Drain 10S# 0.2L* Inlet water Drain Inlet water 0.2L Main Drain wash 1.5L Discharge water water in tub "E1"...
  • Page 47 Drain Static Rinse Drain Discharge water 1.3L water in tub "E1" error Wash heat water heated "E3" error Wash heat Wash heat Wash heat Wash heat Wash 120S Drain Drain Pulse detecting Regeneration Static Drain...
  • Page 48 Work flow timing chart: ECO exist or not countdown Phenomenon NO. Phase Step Parameter 119' Normal Abnormal Static 600S Fan active Fan static Static 600S Static 600S Drain Drain Drain Static 600S Static 600S Static 900S Static Discharge water Pulse detecting Drain Static Drain...
  • Page 49 Work flow timing chart: Fruitwash exist or not(1/0) Phenomenon NO. Phase Step Parameter count Normal count water(12mi Normal Abnormal down (6min) down Inlet water Detected buoy EF error alarm Drain Discharge water 1.6L Wash heat T36/300 Wash Wash Wash drain Wash Wash drain Wash...
  • Page 50 Work flow timing chart: Glass exist or not countdown Phenomenon NO. Phase Step Parameter Normal Abnormal Inlet water Detected buoy bee bee alarm "EF" error Drain 10S# Inlet water 0.2L* Drain Inlet water 0.2L Drain Discharge water 1.5L water in tub "E1"...
  • Page 51 Inlet water 0.2L Drain Discharge water 0.7L water in tub "E1" error Main Discharge water 0.9L water in tub "E1" error wash Wash Wash heat T69/1200S^ water heated "E3" error Wash 300S Wash 300S Drain No drain Drain Static Drain Discharge water 1.4L water in tub...
  • Page 52: Washing Program

    Washing Program Sheet Following table shows best cleaning procedures and amount of dishwashing powder required according to the dirty level of the dishes, as well as the Highest Water Dishwashing Time Power Water Program Temperature powder (g) (min) (kw/h) 60℃ 0.42 72℃...
  • Page 53: Test Program

    Test Program In order to check the operation of components of appliance and find out the malfunction, we designed this program for technician. How to activate Test Program To enter the factory diagnostic mode: 1. Turn the dishwasher off and make sure no LEDs light. 2.
  • Page 54 How to know which error code has occurred Symptom Error Message Possible Reason 1. check the water supply 6. check the drain During the water inlet step, if the flow 2. check the inlet valve 7. check the PCB meter 3.
  • Page 55: Trouble Shooting Flow Logic Chart

    trouble shooting flow logic chart EF code Water tank level switch does not move Open it to solve Make a check of tap? the problem Reconnect the wire of Check the water Solve the problem Floater Circuit and tank Floater Circuit is check again correct or not Still wrong...
  • Page 56 trouble shooting flow logic chart E1 code Longer inlet time Is there any No water failure Internal water pipe solve the problem Water in the plugging tub? water Reconnect the water Make a check of water suction pump Circuit Solve the problem Suction pump circuit and check again is correct or not...
  • Page 57 trouble shooting flow logic chart Longer heating time Failure Check water Make a check of over heat Replace Switch to temperature in the tub proof heating Micro-switch. solve the problem High Jammed Check whether the filter is Clear or replace filter jammed severely or not to solve the problem Reconnect the wire of...
  • Page 58 trouble shooting flow logic chart Overflow Make a check of Reconnect the wire of No water Failure Is there any water on Flooding Switch Flooding Switch circuit solve the problem the bottom board? circuit(normally closed) and check again Still wrong Blocked Some Check whether Flooding...
  • Page 59 trouble shooting flow logic chart Open-circuit failure of thermistor Check whether the NTC Reconnect the wire of circuit is correct or not. Flowmeter circuit and solve the problem (mentioned in section 4) check again Still wrong Replace the NTC to solve problem Short-circuit failure of thermistor...
  • Page 60: Schematics And Wiring Diagrams

    Schematics And Wiring Diagrams WARNING: Disconnect electrical power before servicing. Caution: Label all wires prior to disconnection. Wiring errors can cause improper and dangerous operation. Verify operation after servicing.
  • Page 61 Schematics And Wiring Diagrams Main board Code Designation Code Designation Live (Alternating Current) Blue Naught (Alternating Current) Yellow Earth Green Steam Temperature Detector White Drain Pump Softener Valve Black Water Diverter/Steam Generator Pink IAQS Overflow Switch Gray Flow Meter Orange Dry Heating Protect Switch Brown WaterLevel Switch(135/115)

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Wqp4-t2601c