Kunft WQP12-9260C Technical & Service Manual
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Kunft WQP12-9260C Technical & Service Manual

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Technical Service Manual
Contents
SAFETY NOTICE
This documentation is only intended for qualified technicians
who are aware of the respective safety regulations.
2
3-4
3-4
5-23
5
6-7
8-10
11-12
13-14
15-16
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18-19
20-21
22-23
24-28
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26-28
29-32
33-37
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Summary of Contents for Kunft WQP12-9260C

  • Page 1: Table Of Contents

    Technical Service Manual Contents Specification Function Description Water circuit Theory of parts 5-23 Location Inlet valve 8-10 Drain pump 11-12 Heater 13-14 Washing pump 15-16 Pressure switch 18-19 Flowmeter 20-21 Safety Hose 22-23 Test program 24-28 Procedure Error code 26-28 Inspection 29-32 Troubleshooting...

  • Page 2: Specification

    Specifications Models:WQP12-9260C WQP8-9259C Electrical supply 220-240V, 50Hz Supply water pressure 0.04MPa-1.0MPa Supply water temperature below 60℃ For the basic operation instructions, please refer to the instruction manual attached with each unit. - 2 -...

  • Page 3: Function Description

    -> Function Description Water Circuit - 3 -...
  • Page 4 -> Function Description Water Circuit Process of water inlet (indicated by magenta route) In this process, regeneration water route is cut off, main water route is open. The water in the main water route is softened when pass through the softener, and then enter in the tub. During this phase, some of inlet water will be stored in the air breaker to be regenerating water.

  • Page 5: Theory Of Parts

    Location -> Theory of parts Air breaker Dispenser Inlet valve Water inlet Washing pump Over Heat Proof Micro-switch Heater Filter system Sump Pressure switch (140/120) Pressure switch (83/63) (only for models whose water filling be controlled by pressure switch) Capacity Overflow switch Softener Please Note: Exploded view and part list of each model have some different visions, so...

  • Page 6: Pcb

    -> Theory of parts Printed Circuit Board is the control center of dishwasher, which receive and process signal from components, send order to components and deal with the feedback information, etc. Access PCB Removing the control panel The control panel can be removed from dishwasher door. 1.
  • Page 7 -> Theory of parts Ma p of PC B Note: This map is applies to 9346C model. Description There is small pole’s location difference Mark Function between different models. HEAT Output for Heating Element But the marks on PCB have the same meaning Input of live wire described on the left side Input of bull line...

  • Page 8: Inlet Valve

    Inlet Valve -> Theory of parts Location of inlet valve Appearance connect to inlet water hose to air breaker electric coil inside terminals The work principle The inlet valve is electromagnetic valve that decide whether water enter or not. Valves are normally closed.
  • Page 9 Inlet Valve -> Theory of parts Access inlet valve 1. Disconnect power. 2. Remove the water inlet hose. (Note : Be careful of remain water drop.) 3. Remove the baseboard, left baseboard, top panel, left side panel and middle rear crosspiece.
  • Page 10 Inlet Valve -> Theory of parts Check machine part 1. If the electric part is OK, we need to check the machine part. 2. Remove the baseboard, left baseboard, top panel, left side panel and middle rear crosspiece. 3. Check the valve filter. if the valve filter is blocked, we need clear the residues. 4.

  • Page 11: Drain Pump

    Drain Pump -> Theory of parts Location of Drain Pump The work principle View ottom Drain pump integrated into sump connect to drain hose terminals motor to washing pump The work principle Drain pump consists of electrical motor, impeller, inlet and outlet. Drain pump is a kind of pump driven by permanent magnet synchronous motor.
  • Page 12 Drain Pump -> Theory of parts Access drain pump 1. Drain off the water in the dishwasher, and 。 disconnect the power supply (Note : Make sure to remove remained water in the dishwasher. If not, wet the floor.) 2. Remove four screws on bottom, and then remove bottom board.
  • Page 13 Heater -> Theory of parts The work principle Location of Heater View ottom pressure switch Technical data Nominal voltage 230VAC Rating power 1800W Resistance 29.265 1.463Ω Thermastat1 98℃ Thermastat2 229 ℃ The defeat point 1. The heater coil is broken, so the heater cannot work. It will cause the E3 error. 2.

  • Page 14: Heater

    Heater -> Theory of parts View ottom Clamps Ground terminal Terminals (measure heater resistance) Access heater 1. Drain off the water in the dishwasher, and disconnect the power supply. (Note : Make sure to remove remained water in the dishwasher. If not, wet the floor) 2.

  • Page 15: Washing Pump

    Washing Pump -> Theory of parts Location of Washing Pump The work principle View ottom BLUE BLUE BLACK 150℃ M-main coil A-assistant coil Washing pump is a kind of asynchronism motor with capacitor. The stator consist of silicon steel stack and two coils, main coil and assistant coil .
  • Page 16 Washing Pump -> Theory of parts Access Washing Pump 1. Disconnect power. 2. Remove bottom board. 3. Label and disconnect the 2 terminals to the capacitor. 4. Label and disconnect the 2 terminals to the motor wire connector. 5. Remove the clamp fastening the interconnect hose to the sump. Caution: The clamp is easily damaged during removal and can’t be reused.

  • Page 17: Pressure Switch

    Pressure Switch -> Theory of parts The work principle The pressure switch consists of a moving diaphragm and disc which activate a change over contact. The contact can be calibrated to trip and reset at the desired pressure levels, The main application is to control the level of water in appliances.

  • Page 18: Ntc

    -> Theory of parts The work principle Location of NTC View ottom screws The work principle Negative Temperature Coefficient Thermistor is integrated into sump, which is used for measuring temperature of water in the tub. Access Washing Pump 1. Remove bottom board. 2.
  • Page 19 -> Theory of parts Inspect NTC 1.Open the control panel and take out PCB; 2.Unplug the RE connector(shown in below picture), then use the multi-meter Ω shelf to test resistance between two blue wire , the normal resistance is shown in below table. 3.

  • Page 20: Flowmeter

    Flowmeter -> Theory of parts Location of Flowmeter Top Panel Side panel Baseboard Left Baseboard Attention: Build in models have no Baseboard and left and right baseboard, but adjustable baseboard. The work principle Flowmeter is integrated into Air Breaker. Function of Flowmwter is measure how much water has entered in appliance.
  • Page 21 Flowmeter -> Theory of parts Access Flowmeter 1. Remove the baseboard, life baseboard, top panel and life side panel. 2. Remove the plastic nut inside tub, which secures the air breaker to tub.(Because flowmeter is integrated into air breaker, replace air breaker if flowmeter has failure. ) 3.

  • Page 22: Safety Hose

    Safety hose -> Theory of parts Location of Safety Hose Electronic Aquastop Hose Note: The assembly mode of mechanical Aquastop hose is the same as that of universal. The work principle Mechanical Aquastop Hose Electronic Aquastop Hose There are two types of Safety Hose, mechanical Aquastop hose and electronic Aquastop hose, which have different principles and assembly modes.
  • Page 23 Safety hose -> Theory of parts Access Safety Hose clamp wire co nnecter ( no nee d to di stinguish positive and ne gative elec trode) bound be lt clamp r ing 1. Remove baseboard, side baseboard, top panel and left side panel. 2.

  • Page 24: Test Program

    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 Test Program Operation 9260C 9259C How to start With door closed, Test Program Start/Pause + Power Jump into next...

  • Page 25: Procedure

    Test Program Procedure -> Procedure of Test Program (for models controlling water filling by flowmeter) N o. P rocess D escription Initialization Power on, stand by Open inlet valve and feeds with 3.6L water(45cm models feeds with Inlet Valve 3.0L). Washing Pump Dispenser will act once and washing pump will run for 60s in this step.

  • Page 26: Error Code

    Error Code Test program -> How to know which error code has occurred To know which error code has occurred, refer to the previous table named Test Program Operation. Take 9348 for example, If the error 1 has happened, the buzzer would alarm for 30 seconds and “E1”...
  • Page 27 Error Code Test program -> How does the appliance react when error code occurred E1 Water filling exceed pre-set time For the models controlling water filling by flow meter. If the inlet valve has been opened for 4 minutes but the water quantity hasn’t reached the desired value(measure by pluses), E1 would occur.
  • Page 28 Error Code Test program -> E6 Open-circuit failure of thermistor In test program, once open-circuit failure of thermistor is detected by controller, the E6 would occur. When E6 occurs, the drain pump will run until flowmeter keep motionless for 2 minutes ( if the model with the pressure switch (83/63),drain pump would run till the pressure switch reset ) and all the other components will be stopped immediately.

  • Page 29: Inspection

    Inspection E1 tree -> E1 code Longer inlet time Make a check of inlet No water Failure Is there any hose of AQUASTOP, Replace it to solve water in the Tub? (only for the dishwasher the problem with AQUASTOP device) Little water Not open Open it to solve the Make a check of Tap...
  • Page 30 E3 tree Inspection -> 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 31 E4 tree Inspection -> 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 Some Blocked Check whether Flooding Repair or Replace it...
  • Page 32 E6&E7 tree Inspection -> 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 Check whether the NTC...

  • Page 33: Troubleshooting

    Troubleshooting - 33 -...
  • Page 34 Troubleshooting - 34 -...
  • Page 35 Troubleshooting - 35 -...
  • Page 36 Troubleshooting - 36 -...
  • Page 37 Troubleshooting - 37 -...

This manual is also suitable for:

Wqp8-9259c

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