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background image

BLUE

BLACK

M

BLUE

A

150℃

RED

Washing Pump

Theory of parts

-

>

B

ottom

View

Location of Washing Pump

Technical data

The work principle

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 .

The defeat point

1. The motor coil is broken, so the wash pump can’t work. It will cause E3 error.
2. The motor rotor capacitor is weaken, so washing pump can’t start. In this case, it will
send out the electromagnetism noise. If it is continue electrifying motor, the thermal
protector 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.The drain pump assembly bracket is loose, it will cause noise.
6.If the machine hasn’t been used for long time, there is a possibility the wash pump can’t
starting.

M-main coil
A-assistant coil

Models
Items

YXW65-2B

YXW50-2

Nominal voltage 220-240VAC

220-240VAC

Frequency

50Hz

50Hz

Main coil: 84.8±7%Ω

Main coil:93.10±7%Ω

Assistant coil:78.6±7%Ω

Assistant:95.99±7%Ω

Delivery height

0.8m

1m(230VAC)

Delivery
performance

≥50l/min(230VAC)

≥50l/min(230VAC)

Lock rotor
current

≤1.50A

1.0±10%(230VAC)

Operating
current

0.65A±10%

0.47±10%(230VAC)

Capacitor

5μF

3μF

Resistance

-

15 -

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Содержание WQP12-B9227E

Страница 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 Troubleshooting 34 38 SAFETY NOTICE This documentation is only intended for qualified technicians who are aware of the respective safety regulations 1 ...

Страница 2: ...the basic 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 Models WQP12 B9227E ...

Страница 3: ...flow 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 route Drain water route Water Circuit Function Description 3 ...

Страница 4: ...shing 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 spray arm nozzles over the dishes into sump where connect to washing pump and to get in the next water cycle Process of regeneration indicated by green route Regeneration valve is open the regenerati...

Страница 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 view and part list of each model have some different visions so please refer to newest vision Midea sent you 5 ...

Страница 6: ...to 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 the screws securing the PCB to control panel 5 Remove the PCB 6 Reverse the above procedure to install PCB Note For the majority of models the PCB is located behind the control panel The minority of m...

Страница 7: ...ut of inlet valve 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 Note This map is applies to 9378A model There is small pole s location difference between different models But the marks on PCB have the same meaning described on the left side 7 ...

Страница 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 can t open It will cause the E1 error 2 The filter is jammed so water can t enter It will cause the E1 error 3 The connector is loose so the valve can t open It will cause the E1 error 4 The valve pole...

Страница 9: ... 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 Ω shelf to measure resistance between the blue wire EV1 and white wire IS the normal resistance is about 3 4KΩ to 4 3KΩ 3 I f the measured resistance is not correct it means the valve coil is broken or the connector is loose In this case we should ch...

Страница 10: ...eboard 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 water check whether valve can act or not If it isn t we need replace the valve 5 If the water is continue entering we need replace the valve 10 ...

Страница 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 work It will cause the E2 E4 or E1 error 3 The connector is loose so the drain pump can t work It will cause the E2 E4 or E1 error 4 The rotor is locked by residues so the drain can t work It will cau...

Страница 12: ...el 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 drain pump Check the electric part 1 Open the control panel and take out the PCB 2 Unplug the CON4 and P4 wires then use the multi meter Ω shelf to measure the red wire PS and white wire IS the normal r...

Страница 13: ...he 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 Location of Heater pressure switch Nominal voltage 230VAC Rating power 1800W Resistance 29 265 1 463Ω Thermastat1 98 Thermastat2 229 13 ...

Страница 14: ...f parts 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 board 3 Label and disconnect the terminals to and ground wire 4 Remove the 2 clamps from the Heating element Caution The clamp is easily damaged during removal and can t be reused Replace the old cla...

Страница 15: ...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 The drain pump assembly bracket is loose it will cause noise 6 If the machine hasn t been used for long time there is a possibility the wash pump can t starting M main coil A assistant coil Models Items ...

Страница 16: ... 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 pump motor assembly Note Do not attempt to remove the bolt and locknut connecting the motor mount to the dishwasher frame 9 Remove the motor pump assembly from the dishwasher 10 Reverse the above procedur...

Страница 17: ...ntrol 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 protection like 140 120 serial Manufacturer EMZ 11 COM 12 NC 14 NO Front view Back view 11 14 12 2 3 1 Back view Front view Manufacturer Elbi 1 COM 2 NC 3 NO Pressure Switch Theory of parts The work princi...

Страница 18: ...ve 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 to sump shown in above picture 3 Take out NTC 4 Reverse the above procedure to install screws 18 ...

Страница 19: ...lug 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 I f the resistance is not correct it means NTC circuit has a problem In this case we should check the connection first If the problem hasn t been solved by re connection we would replace the NTC unplug NTC resistance table 19 ...

Страница 20: ...ered 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 and send electronic pulses Top Panel Side panel Left Baseboard Baseboard Attention Build in models have no Baseboard and left and right baseboard but adjustable baseboard 20 ...

Страница 21: ...send 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 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...

Страница 22: ...ir 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 difference from mechanical is that if the water leak and flow on the bottom tray the flooding pressure switch on the tray will act the electromagnetic valve on the hose will cut off the water road and the mac...

Страница 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 Ω shelf to measure resistance between the blue wire EV1 and white wire IS Open circuit and short circuit are both incorrect 3 I f the measured resistance is not correct it means the valve coil is broken or the connector is loose In this case we should check th...

Страница 24: ...am running you can press 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 Program In order to check the operation of components of appliance and find out the malfunction we designed this program for technician Test Program B9227E How to start Test Program With door closed Program ...

Страница 25: ...ntrolling water filling by flowmeter Drain for 30s Pause for 10s Open inlet valve and feeds with 3 6L water Description Power on stand by Open inlet valve and feeds with 3 6L water Buzz one sound stop and stand by Dispenser will act once and washing pump will run for 60s in this step Run washing pump and heating element until the water temperature reaches 57 Then the machine will pause Press Progr...

Страница 26: ...Main 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 majority of models are follow this regulation but some special models is different combination Priority level of E4 is the highest E4 operation is valid after other error operations have done When E4 ope...

Страница 27: ...and 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 would occur When E2 occurs drain pump will keep working for 2 minutes and appliance will stop all the other components immediately At the same time the buzzer will alarm for 30 seconds and error 2 will ...

Страница 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 same time the buzzer will alarm for 30 seconds and error 7 will be shown E7 Short circuit failure of thermistor At any time if overflow micro switch act and keep for longer than 2 seconds the E4 would o...

Страница 29: ...Still 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 Failure Failure Reconnect the wire of Pressure Switch circuit and check again Not solve the problem OK Replace the Pressure switch to solve problem Still wrong Make a check of inlet hose of AQUASTOP on...

Страница 30: ...e 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 is no water in the tub check whether Pressure Switch 83 63 circuit is open or not which control water inlet Reconnect the wire of Pressure Switch circuit and check again OK Still wrong Replace the P...

Страница 31: ...the 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 Washing Pump circuit and check again Not solve the problem OK Replace the Washing Pump to solve problem Still wrong OK Reconnect the wire of NTC circuit and check again solve the problem OK Replace t...

Страница 32: ...follows 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 could easily repeat at a higher temperature and after a long period of running time Observe the bottom tray every twenty minutes If any water appears you will found out which areas such as motor drain pu...

Страница 33: ...ailure 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 problem Still wrong If the problem has not been solved through all the inspection mentioned above maybe the PCB has a malfunction So replace PCB and test again Caution Because the real situation is unpr...

Страница 34: ...Troubleshooting 34 ...

Страница 35: ...Troubleshooting 35 ...

Страница 36: ...Troubleshooting 36 ...

Страница 37: ...Troubleshooting 37 ...

Страница 38: ...Troubleshooting 38 ...

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