Prima LPR661 Technical & Service Manual
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Prima LPR661 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.
LPR661
Model
LPR659
1
2
3
4-18
4-5
6
7-18
19-33
19
19-21
22-24
25-26
27-28
29-30
31
32-33
34-35
36-39
37
38-39
40-43

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Summary of Contents for Prima LPR661

  • Page 1: Table Of Contents

    Technical Service Manual LPR661 Model LPR659 Contents Specification Operation instructions Installation instructions Function Description 4-18 Water circuit Circuit schematic Exploded View & Part List 7-18 Theory of parts 19-33 Location 19-21 Inlet valve 22-24 Drain pump 25-26 Heater 27-28 Washing pump...

  • Page 2: Specification

    Specifications LPR661 Models Electrical supply 220-240V, 50Hz Supply water pressure 0.04MPa-1.0MPa Supply water temperature below 60 Settings Models LPR659 Electrical supply 220-240V, 50Hz Supply water pressure 0.04MPa-1.0MPa Supply water temperature below 60 Settings...

  • Page 3: Operation Instructions

    Operation instructions Control Panel Di617 Delay Prog. ON/OFF Button: Will turn on/off the power supply. Display Window: delay time, running indicator, fault codes etc. Power on light: To come on when Power ON/OFF button is pressed down. Half washing button:To select half washing. Program button: To select washing program (Optional half washing means that the lower spray arm when the button is pressed.

  • Page 4: Installation Instructions

    Installation instructions...

  • Page 5: Function Description

    -> Function Description Water Circuit...
  • Page 6 -> 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 7: Circuit Schematic

    -> Function Description Circuit Schematic Circuit schematic diagram LPR661 LPR659...

  • Page 8: Exploded View & Part List

    -> Function Description Exploded view LPR661 Please Note: Exploded view and part list of each model have some different visions, so please refer to newest vision Midea sent you.
  • Page 9 -> Function Description Exploded view LPR 661...
  • Page 10 -> Function Description Exploded view LPR 661...
  • Page 11 -> Function Description Part List LPR661 Serial Code Description Quantity Number 1001 673000900249 External pipe 1002 673001500005 O Ring I 31.5X3.55 1003 673001800364 Guide casing 1004 673001600021 External pipe nut 1005 673001900016 Water dispenser 1006 673000300067 Upper sprayer 1007 673000900089...
  • Page 12 -> Function Description Part List LPR661 Serial Code Description Quantity Number 1083 673000900045 Bend connect hose 1085 673001400025 Heating element support 1086 674001100039 Heating elements 1088 673001600024 Water inlet nut 1089 673001500019 Water inlet gasket 1091 673002600035 Water inlet 1093...
  • Page 13 -> Function Description Part List LPR661 Serial Code Description Quantity Number 3005 672001500008 Upper rear crosspiece 3006 673001300061 door clamp 3007 672001400039 door lock 3009 672001500246 Upper front crosspiece 3010 673001700057 Tank gasket 3011 672002100057 Upright right assembly 3012 672001600211...
  • Page 14 -> Function Description Exploded view LPR659...
  • Page 15 -> Function Description Exploded view LPR659...
  • Page 16 -> Function Description Exploded view LPR659...
  • Page 17 -> Function Description Part List LPR659 Serial Code Description Quantity Number 1001 673000900249 External pipe 1002 673001500005 O Ring I 31.5X3.55 1003 673001800364 Guide casing 1004 673001600021 External pipe nut 1005 673001900016 Water dispenser 1006 673000300050 Upper sprayer 1007 673000900195 Upper sprayer pipe 1010 673002300002...
  • Page 18 -> Function Description Part List LPR659 Serial Code Description Quantity Number 1086 674001100039 Heating elements 1088 673001600024 Water inlet nut 1089 673001500019 Water inlet gasket 1091 673002600035 Water inlet 1093 674000900038 Sensing device 1113 673002500048 plane filter Scran collection 1114 673001300137 1115 674000300079...

  • Page 19: Function Description

    -> Function Description Part List LPR659 Serial Code Description Quantity Number 3005 672001500003 Upper rear crosspiece 3006 673001300061 door clamp 3007 672001400039 door lock 3009 672001500247 Upper front crosspiece 3010 673001700056 Tank gasket 3011 672002100057 Upright right assembly 3012 672001600211 Right panel 3013 673001300072...

  • Page 20: Theory Of Parts

    Location -> Theory of parts Air breaker Dispenser Inlet valve Washing pump Water inlet Anti-dry-heating pressure switch Heater Filter system Sump Pressure switch (140/120) Capacity Flooding switch Softener Power switch Door latch Display...

  • Page 21: 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 22 -> Theory of parts Map o f P C B Description Mark Function HEAT Output for Heating Element Input of live wire Input of bull line Input of Door Switch Output for Washing Pump(ML) and Drain CON21 Pump(PS) Ouput for Dispenser(D/ED), Softener(EV2), CON22 Halfload Valve(EV3) and Inlet Valve(EV1) CON24...

  • Page 23: 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. Each time the appliance requires water, the controller will convey an electric signal to the coils to open the valves.
  • Page 24 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 left baseboard and middle rear crosspiece. 4. Disconnect the 2 terminal lugs from the inlet valve.

  • Page 25: Inlet Valve

    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.

  • Page 26: 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 27 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 28 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 1.463 Thermastat1 Thermastat2 The defeat point 1. The heater coil is broken, so the heater cannot work. It will cause the E3 error.

  • Page 29: 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 30: Washing Pump

    Washing Pump -> Theory of parts Location of Washing Pump The work principle BLUE BLUE View ottom 3uF/450V BLACK 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 31: Washing Pump

    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 32: 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 33: 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 34 -> 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 shelf to test resistance between two blue wire , the normal resistance is shown in below table. 3.

  • Page 35: 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 36 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 37: 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 With the door opened and machine off, press the Program button. Hold down the Program button and press the POWER button until the machine enter into Test Program.

  • Page 38: Procedure

    Test Program Procedure -> Test Program Procedure 00: Power on, standby mode Initialization 01: Inlet valve start to work, feeds 3.6 liter water into dishwasher.(45cm appliance feeds 2.8 liter water) Inlet valve Washing pump 02: Washing pump and dispenser will be running for 60s. And dispenser 03: Washing pump and hearting element begin to work, hearting Heating element...

  • Page 39: Error Code

    Error Code Test program -> E1 Longer inlet time If the inlet valve has been opened for 4 minutes but the water quantity hasn’t reached the desired value(measure by pluses), E1 will come on. When E1 happens, the drain pump will run until flowmeter keep motionless for 2 minutes and all the other loads will be cut off immediately.
  • Page 40 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 will come on. When E6 happens, the drain pump will run until flowmeter keep motionless for 2 minutes and all the other loads will be cut off immediately.

  • Page 41: 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 42 E3 tree Inspection -> Longer heating time Make a check of Anti-dry- Failure Check water Replace Switch to heating Pressure temperature in the tub solve the problem Switch.(mentioned below) High Reconnect the wire of Failure Make a check of Heater. Heater circuit and check solve the problem (mentioned in section 4)
  • Page 43 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 44: Inspection

    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...

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Pr659

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