Delfa WQP12-9242B Technical & Service Manual Download Page 1

Contents

Technical Service Manual

Dishwasher

Specification                       2

Test program                       24-28

Theory of parts                    5-23

Function Description          3-4

Inspection                            29-33 

Location                                                       5

PCB                                                              6-7

Inlet valve                                                    8-10

Drain pump                                                  11-12

Heater                                                          13-14

Washing pump                                            15-16

Procedure                                                    25

Error code                                                    26-28             

Water circuit                                                3-4

Pressure switch                                          17

NTC                                                              18-19

Flowmeter                                                    20-21

Safety Hose                                                  22-23

Troubleshooting                  34-38 

                     

  

 SAFETY NOTICE

This documentation is only intended for qualified technicians 
who are aware of the respective safety regulations.

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Summary of Contents for WQP12-9242B

Page 1: ...cation 5 PCB 6 7 Inlet valve 8 10 Drain pump 11 12 Heater 13 14 Washing pump 15 16 Procedure 25 Error code 26 28 Water circuit 3 4 Pressure switch 17 NTC 18 19 Flowmeter 20 21 Safety Hose 22 23 Troubl...

Page 2: ...sic operation instructions please refer to the instruction manual attached with each unit Electrical supply 220 240V 50Hz Supply water pressure 0 04MPa 1 0MPa Supply water temperature below 60 2 Model...

Page 3: ...low switch air breaker inlet valve inlet hose Regeneration water route upper spray arm top spray tube Inlet water route lower spray arm softener Water circuit scheme regeneration valve Cycle water rou...

Page 4: ...hing indicated by blue route Cycle washing action is driven by washing pump motor Water can obtain the power during it passing through the working washing pump then be pumped into spray arm pass from...

Page 5: ...Heat Proof Micro switch Dispenser Sump Water inlet Air breaker Pressure switch 83 63 only for models whose water filling be controlled by pressure switch Pressure switch 140 120 Please Note Exploded v...

Page 6: ...o the door 2 The control panel will drop down and be free of the door But the wiring will still connected to the control panel S 08 1 2 on Off Access PCB 3 Disconnect the connector form PCB 4 Remove t...

Page 7: ...alve RE Thermister ML Washing Pump PS Drain Pump D ED Dispenser EV1 Inlet valve EV2 Softener EV3 Halfload Valve ISS Salt detect ISB Rinse detect IAQS Overflow detect FM Flowmeter FAN Fan PO Pressure S...

Page 8: ...er enter into machine when it receive the order given by controller to air breaker connect to inlet water hose terminals electric coil inside The defeat point 1 The valve coil is broken so the valve c...

Page 9: ...r valve 7 Reverse the above procedure to install 1 Open the control panel and take out the PCB 2 Unplug the CON3 and P4 wires then use the multi meter shelf to measure resistance between the blue wire...

Page 10: ...board 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 If the valve filter is clear and the valve can t inlet w...

Page 11: ...tor will be very easy to start The defeat point 1 The motor coil is broken so the drain pump can t work It will cause the E2 E4 or E1 error 2 The magnetism of motor rotor is weak so drain pump cannot...

Page 12: ...bel and disconnect the two terminal lugs from the drain pump 4 Remove screws securing the drain pump to sump then remove drain pump 5 Reverse the above procedure to install Access drain pump Inspect d...

Page 13: ...e heater cannot work It will cause the E3 error 3 The connector is loose so the heater cannot work It will cause the E3 error Heater Theory of parts Bottom View The work principle Technical data Locat...

Page 14: ...arts Bottom View 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 Remove bottom bo...

Page 15: ...or will work It will cause E3 error 3 The connector is loose the wash pump can t work It will cause E3 error 4 The rotor is locked by residues so the wash pump can t work It will cause the E3 error 5...

Page 16: ...a 31 0mm 6 Remove the clamp fastening interconnect hose to the lower nozzle 7 Remove the clamp fastening interconnect hose to heater 8 Remove the screw and disconnect the ground wire from the wash pum...

Page 17: ...trol the level of water in appliances May also provide flood protection In our production the pressure switch is to control the water level in appliance like 83 63 serial May also provide flood protec...

Page 18: ...e 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 Remove two screws securing the NTC...

Page 19: ...he RE connector shown in below picture then use the multi meter shelf to test resistance between two blue wire the normal resistance is shown in below table 3 I f the resistance is not correct it mean...

Page 20: ...red in appliance it consists of impeller tongue tube and terminal etc When water pass through the flowmeter moving water can rotate magnetic impeller the tongue tube can sense the impeller s magnetic...

Page 21: ...end sound In this case it means something wrong with flowmeter circuit We should check the connection first If the problem hasn t been solved by re connection we should replace the air breaker Access...

Page 22: ...r space between two layers the foaming material will expand and lock the hose In this situation the machine might set off E1 alarm Electronic Aquastop safety hose also has two layers But the differenc...

Page 23: ...ce just as universal water inlet hose 1 Open the control panel and take out the PCB 2 Unplug the CON3 and P4 wires then use the multi meter shelf to measure resistance between the blue wire EV1 and wh...

Page 24: ...g you can press Rightmost Program button to jump into next step except inlet valve step Note The way to activate test program is slightly different between different models How to activate Test Progra...

Page 25: ...ll run for 60s in this step Run washing pump and heating element until the water temperature reaches 57 Then the machine will pause Press Rightmost Program button to jump into the next step Open regen...

Page 26: ...ain Rinse and Drying indicators would flash simultaneously Other error alarms can be deduced from this The corresponding relation between indicator and error code shown in above figure Notice the majo...

Page 27: ...nd continue draining for 60 seconds For the models controlling water filling by pressure switch If the drain pump has been running for 4 minutes but the water level pressure switch hasn t reset E2 wou...

Page 28: ...if the model with the pressure switch 83 63 drain pump would run till the pressure switch reset and continue draining for 60 seconds and all the other components will be stopped immediately At the sam...

Page 29: ...till wrong Replace the Inlet Valve to solve problem Check whether the Pressure Switch 83 63 circuit is correct or not Make a check of Inlet Hose solve the problem Inlet Hose is blocked or kinked OK Fa...

Page 30: ...of Drain Pump circuit and check again OK Still wrong Replace the Drain pump to solve problem Make a check of Drain Hose solve the problem Drain Hose is blocked or kinked OK Failure Failure When there...

Page 31: ...he wire of Heater circuit and check again OK Still wrong Replace the Inlet Valve to solve problem Check whether the Washing Pump circuit is correct or not mentioned in section 4 Reconnect the wire of...

Page 32: ...ollows Remove two side panels Remove the water from the bottom board and make sure there is no water at the bottom board Restart the dishwasher with a strong or standard wash program as a leakage coul...

Page 33: ...ilure of thermistor Check whether the NTC circuit is correct or not mentioned in section 4 Reconnect the wire of Flowmeter circuit and check again Not solve the problem OK Replace the NTC to solve pro...

Page 34: ...Troubleshooting 34...

Page 35: ...Troubleshooting 35...

Page 36: ...Troubleshooting 36...

Page 37: ...Troubleshooting 37...

Page 38: ...Troubleshooting 38...

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