SERVICEMANUAL DISHWASHERS DW20.1, DW20.2, DW20.3, DW20.4, DW20.5, DW20.
Contents 1. Introduction .............................................................................................................. 5 2. Technical data ........................................................................................................... 8 2.1 Technical information ....................................................................................... 8 2.2 Components and measured values ................................................................... 9 2.3 Connection diagram ..
INTRODUCTION 1. Introduction In your hand you are holding ASKO’s Service Manual for the new generation of dishwashers. The dishwashers in the DW20 range are available in four different basic models with the type designations DW20.1, DW20.2, DW20.3, DW20.4, DW20.5 and DW20.C. Presented on the following page are the different panels available for each type, which lets you readily identify the machine type. The different variants have different designations from market to market.
INTRODUCTION DW20.1 DW20.1 is available in three variants, either with none, one or with two options. All have four set programmes and operating controls on the front of the panel. DW20.2 DW20.2 is a control unit with a large display on the front of the panel. It has six set programmes and none or three or five options. DW20.3 The buttons are on the top side of the control unit in the DW20.3. The unit has six set programmes and is available in two models - with three or five options. DW20.4 DW20.
INTRODUCTION DW20.5 DW20.5 is a control module with display on the front of the panel. It has five fixed programs and between three and five options. PROG S TA R T STOP DW20.C DW20.C is a control unit with a large display on the front of the panel. It has six set programmes and none or three or five options.
TECHNICAL DA ATT A 2. Technical data 2.1 Technical information Height: Width: Depth: Weight: Capacity*: Water pressure: Connection: Max connection power: *According to standard EN 50242 **See rating plate 8 820 - 870 mm = for 820 mm machines, (860 - 870 mm) = for 860 mm machines 596 mm 570 mm 42 kg/45 kg with water softener 12 place settings 0.03–1.0 MPa (0.
TECHNICAL DA ATT A 2.2 Components and measured values Indicated resistance values apply at room temperature (ca. 20°C/68°F) Values within ±10% are regarded as normal Item No. Component Measured value Position 8073779 Radio interference suppression filter 680 kohm 8073780,81 Radio interference suppression filter 1 Mohm 8073784 Heating element 1800 W 230 V 30 ohm 8073785 Heating element 1200 W 120 V 12 ohm 8073788 Thermistor 25 kohm 8073801,02 Combined dispenser 230 V 1.
TECHNICAL DA ATT A Item No. Component 8801260 Control unit Compl., DW20.1 EU 8801285 Control unit Compl., DW20.1 AU 8801286 Control unit Compl., DW20.1 USA 8801261 Control unit Compl., DW20.2 EU 8801279 Control unit Compl., DW20.2 AU 8801280 Control unit Compl., DW20.2 USA 8801272 Control unit Compl., DW20.3 EU 8801281 Control unit Compl., DW20.3 AU 8801282 Control unit Compl., DW20.3 USA 8801273 Control unit Compl., DW20.4 EU 8801283 Control unit Compl., DW20.
S:\U\Dw20\1_Tryckunderlag\Kopplingsschema\8073809 Circuit diagram DW20-01.
TECHNICAL DA ATT A 2.4 Functional description of components A description of the function and specification of the different electrical components is given here. Certain components are only included in highly specified machines or on individual markets. Inlet valve/Flow valve Available in single, safety and water softener valve models. A filter which traps particles is located in the valve. Situated after this is a flow restrictor, which maximizes the flow to 4 l/min.
TECHNICAL DA ATT A Heating element Main switch The heating element is of the through-flow type and is situated between the sump and the suction sleeve of the circulation pump. It consists of a pipe with a heating coil. On one side of the heating element coil is an overheating safety device with a breaking temperature of 97°C and with automatic resetting. On the other side is a fusible cut-out rated at 206°C. The main switch is a 2-pole unit and switches off phase and neutral.
TECHNICAL DA ATT A Wiring Pressure sensor The machine is provided with coded contacts to prevent faulty connection. The wiring conforms to the standard for Rast 2.5 and 5. The pressure sensor is connected to the pressure chamber in the sump. It measures the pressure corresponding to the water level in the machine. In the event of an excessively high water level in the machine (continuously under 5 sec), the drain pump starts and other components are switched off.
I N S TTA ALLA ATT I O N 3. Installation Recommended position for the dishwasher Built-in installation The dishwasher can be installed as a built-in, fully freestanding or half freestanding machine. 570 20 550 WARNING! Connection to electricity, water and drains must be carried out by a person with competence within the respective area. 820-870 ( 860-870 ) 820-870 ( 860-870 ) 100150 570 600 A. Built-in The dishwasher can be built in under a worktop with a working height of 820 - 870 mm.
I N S TTA ALLA ATT I O N Connection to water Connection to drainage There must always be a stopcock in the supply line. The stopcock must be positioned above the sink or on the front edge of the sink unit. The inlet pipe has a union with a 1/2” or 3/4” internal thread, depending on the country. When installation is complete, open the stopcock, leave the system under pressure for a time and check that all connections are tight.
I N S TTA ALLA ATT I O N Adjustiment of freestanding machine 1. 2. 3. Adjust the height of the machine with the four steel feet. (see Figure 4) NOTE! The machine must not be inclined by more than 5 mm. Lock the feet with the nuts. After adjusting the steel feet, screw the two rubber feet firmly to the floor. The rubber feet now act as a tilt prevention means. (see Figure 5) Stålfötter Steel feet Steel feet Figure 4. Adjustment of machine with three or four feet 1. 2. 3. 4. 5. 6. 7.
I N S TTA ALLA ATT I O N 8. Adjust the feet accurately (the machine must not be inclined by more than five mm) and tighten the locking nuts on the front feet. To prevent kinking, pull on the drain hose and connection pipe (see Figure 8). Adjustment of plinth (only for models with a kickplate as an accessory) The machine has two kick-plates. Use the higher plate if the machine will be 850 870 mm high and the plinth depth can be varied between 45 - 105 mm.
I N S TTA ALLA ATT I O N 4. Settings 4.1 Programme Certain programmes are not included in all machines. Intensive wash Prewash (40 °C), prewash (cold), main wash (basic temperature 60°C), pre-rinse, two rinses, final rinse (hot-temp. depending on drying selection, with/without fan, etc.), drying. Heavy wash Basic temperature 55°C in main wash, otherwise according to Intensive wash. Lower basket wash Main wash (incl. pre-soak, basic temperature 55°C), rinse (cold), final rinse (hot), drying.
SETTINGS 4.2 Time display DW20.2, DW20.4, DW20.5, DW20.C: For programme selection, the display shows the time taken by the programme on the previous occasion. After starting the programme, the time is counted down in stages of one minute (no conversion while the programme is running). A new time is not stored if a fault has occurred while the programme is running. DW20.2, DW20.3: The start lamp flash if the door is opened during the programme or is open when the programme is started. DW20.
SETTINGS DW20.1 Variant B Variant A L2 L2 L3 L12 PROGRAM S1 L2 L3 L12 L7 L1 L4 L1 L11 Variant A S2 START L11 S1 STOP L5 L10 S3 L9 L8 STOP S2 S4 L5 L6 START L11 S1 S2 L7 L4 PROGRAM L8 STOP S4 L6 L12 L1 L4 PROGRAM START L3 L7 L10 L9 Water hardness setting Panel type DW20.1, L = LED, S =Push-button Temperature selection S3 Long and Normal drying (Quick wash: Long and No drying). (L5 lights when long/extra drying is selected) Activation of setting menu 1.
SETTINGS DW20.2 Variant setting L1 L2 L3 L4 L5 L6 S1 S2 S3 S4 S5 S6 S7 Panel type DW20.2, L = LED, S =Push-button, S3a Washing in both baskets Both-basket washing (basic setting). The machine’s upper and lower baskets are loaded with items to be washed. If the control unit is replaced, the machine will automatically be in the variant setting menu when the power supply is switched on for the first time. Fill the machine with appr. 1 litre of water! 1.
SETTINGS Child lock Activation/deactivation of setting menu: Water hardness setting Activation of setting menu: 1. 2. 3. 4. 5. 6.
SETTINGS DW20.3 S1 L1 L2 L3 L4 L5 L6 S3 S4 S5 S6 S7 S2 Panel type DW20.3, L = LED, S = Push-button S3a Washing in both baskets Both-basket washing (basic setting). The machine’s upper and lower baskets are loaded with items to be washed. b Washing in the upper basket Most of the process water is directed by the spray arm divider to the upper spray arm.
SETTINGS Water hardness setting Child lock Activation of setting menu: Activation of setting menu: 1. 2. 3. 4. 5. 6. 1. 2. 3. Turn off the main switch (I/0) Wait for at least 5 seconds Keep the Start button depressed (S2) Turn on the main switch (I/0) Release the Start button (S2) Select the desired water hardness with the Programme button (S1) 4. 5. 6. Setting: All LEDs extinguished L1 lit L1-2 lit L1-3 lit L1-4 lit L1-5 lit L1-6 lit Water hardness[°dH] 0-5 (incl.
SETTINGS DW20.4 L8 S3 L9 S4 S1 S2 L1 L2 L3 L4 L5 L6 L7 Panel type DW20.4, L = LED, S = Push-button Super rinsing (does not apply to variant 2) Variant 1: S3 = Set, S4 = Menu Variant 2: S3 = Temperature S4 = Drying Adds two rinses.
SETTINGS 6. e) Temperature display in °C/°F. f) Machine information. Water consumption for most recent programmes run, number of programmes run. Toggle with S3. Confirm your choice by pressing Start (S2). The programme returns to the main menu. Demo mode Enter by pressing S4 and then turn the power On or both at the same time Scrolling arguments will appear : “Turbo Drying ...Super Cleaning System...Auto Wash...Flexi Racks...Power Zone...8 Steel......Turbo Drying... Exit by turning main switch Off.
DW20.5 Panel type DW20.5, L = LED, S =Push-button, D= Display S7a Washing in both baskets Both-basket washing (basic setting). The machine’s upper and lower baskets are loaded with items to be washed. b Washing in the upper basket Most of the process water is directed by the spray arm divider to the upper spray arm. c Washing in the lower basket Most of the process water is directed by the spray arm divider to the lower spray arm. S3 Temperature selection LED lights when high temperature is selected.
If you wish access to the variant setting again: Fill the machine with appr. 1 litre of water! 1. Turn off the main switch (I/0) 2. Wait for at least 5 seconds 3. Keep the Programme/Start buttons (S1&S2) depressed 4. Turn on the main switch (I/0) 5. Release the Programme/Start buttons (S1&S2) at once! It takes a few seconds for the machine to read off that S1&S2 are depressed. 6. Press Start (S2) three times in a rapid succession. Indication 1 or 2 flashes in the display. 7.
DW20.C Total reset L1 L2 L3 L4 L5 L6 S1 S2 S3 S4 S5 S6 S7 Panel type DW20.C, L = LED, S =Push-button, Water hardness setting Activation of setting menu: 1. 2. 3. 4. 5. 6.
4.4 Water level DW20 When servicing DW20 dishwashers, it is important to check the water level in the machine. This is particularly important when programming the time-controlled water intake. Too low a water level can cause poor dishwashing results. Always allow the machine to take in and pump out water a few times before checking the level. Overflow level = 6.5 litres Without Spray arm diverter = 3.1 litres (1.5 mm above the level) With Spray arm diverter = 2.7 litres (0.
SERVICE MENU 5. Service menu 5.1 Activation of service menu DW20.1 (only water intake setting) 1. 2. 3. 4. 5. Turn off the main switch (I/0) Wait for at least 5 seconds Keep the Programme and Start buttons depressed (S1 & S2) Turn on the main switch (I/0) Release the Programme and Start buttons (S1 & S2) L7 flashes The water intake can now be adjusted by pressing S1 once again. L7 is flashing continuously during the operation.
DW20.3 1. 2. 3. Turn off the main switch (I/0) Wait for at least 5 seconds Keep the Programme and Start buttons depressed (S1 & S2) 4. Turn on the main switch (I/0) 5. Release the Programme and Start buttons (S1 & S2) The most recent fault is indicated as L1-L6. Press the Programme button (S1) and index through the following components. 1. Inlet valve 2. Salt valve (only machines with water softener) 3. Detergent and surfactant dispenser 4. Circulation pump 5.
°C Display °C Display 0 32 40 111 5 40 45 123 10 49 50 134 15 60 55 146 20 71 60 156 25 80 65 167 30 90 70 177 35 101 75 188 The table shows the temperature and equivalent display code Adjusting water intake Press Drying/Menu (S4) for setting the water intake. Machines manufactured before year 2005 week 16 Press Drying/Menu (S4) to access water intake setting Press Temperature/Set (S3) to adjust the water intake.
SERVICE MENU Adjusting water intake Press the program selector (S1) for 3 secs to activate the menu for setting the water intake. Then step through using the Program button (S1).
SERVICE MENU 5.2 Programme flow description Illustrated below is a normal programme (for EU ) and the sequence in which the various components arc connected. Normal wash Component Commentary Main wash Drain pump 25 sec Inlet valve 605 pulse*, 47 sec, 3.1 lit*** 535 pulse* 40 sec, 2.
SERVICE MENU Cooling down (not DW20.1) Machines with softener : Cool down step is NOT performed during regeneration. Drain pump 5 sec Inlet valve 24 sec Circulation pump 60 sec Drain pump 25 sec Inlet valve 170 pulse*, 14 sec, 0.9 lit Circulation pump 20 sec, Lower arm low pressure ** Drain pump 25 sec Inlet valve 605 pulse*, 47 sec, 3.1 lit*** Pre-rinse 1st. Rinse 545 pulse* 43 sec, 2.
EU (not DW20.C) Normal wash and High temp selected (for machines produced from W16 2005) Component Commentary Drain pump 25 sec Inlet valve 605 pulse*, 47 sec, 3.1 lit*** Pre wash 545 pulse* 43 sec, 2.8 lit EU** Circulation pump 30 sec Upper arm high pressure** Pause 1 sec Circulation pump 60 sec Circulation pump 30 sec** Drain pump 2 sec SCS stage Circulation pump 20 sec SCS stage Upper arm high pressure ** Drain pump 25 sec Inlet valve 605 pulse*, 47 sec, 3.
Cooling down (not DW20.1) Machines with softener : Cool down step is NOT performed during regeneration. Drain pump 5 sec Inlet valve 24 sec Circulation pump 60 sec Drain pump 25 sec Inlet valve 170 pulse* , 14 sec, 0.9 lit EU Circulation pump 20 sec, Lower arm low pressure** Drain pump 25 sec Inlet valve 605 pulse*, 47 sec, 3.1 lit*** Pre-rinse 1st. Rinse 545 pulse* 43 sec, 2.
TROUBLESHOOTING 6. Troubleshooting If there are problems with poor washing results, you must observe the following rules in the first instance: • • • • • • Use a suitable programme, such as Normal programme 55°C/60°C for normally soiled items. After week 16 2005, 55°C/65°C Australia: 45°C/50°C. Not DW20.C, which has a temperature of 55°C for a normal program and Sani A (B). If more heavily soiled items are to be washed, e.g.
TROUBLESHOOTING If you have answered “YES” to the above questions, you should check the following: that the machine has the correct quantity of water, that the spray arms are moving in the right direction and are rotating at the correct speed (minimum 12 r/min), that the circulation pump is working as intended, that the spray arm divider is working as intended and that the machine empties the water properly (no residual water present before refilling).
TROUBLESHOOTING 6.2 Fault indication DW20.2 DW20.1 L2 L3 L12 L1 L2 L3 L7 L4 L5 L6 L4 L1 START L11 PROGRAM S1 STOP S2 S2 S1 S3 L2 S4 S5 L12 L7 L4 PROGRAM START L11 S1 L8 STOP DW20.C S2 S4 L10 L5 L6 L9 L1 L2 L3 L2 L3 L1 L4 L5 L6 S1 L12 S2 L7 L4 PROGRAM START L11 S1 S3 L8 STOP S4 S5 S6 S7 S2 S4 L10 L5 L6 S7 L3 L1 S3 S6 L9 DW20.3 S1 L1 L2 L3 L4 L5 S3 L6 S4 S5 S6 S7 S2 DW20.4 S1 L1 L2 L3 L4 L5 L6 L8 S3 L9 S4 S2 L7 DW20.
TROUBLESHOOTING 6.3 Fault codes LED L12/Fault code F6, Pressure sensor fault In the fault codes below, “L ” denotes LED and “F” denotes fault code on the display. Output signal > 4.8V. The programme continues. Indication only in the service menu. Check: Pressure sensor, control unit and wiring. LED L1/Fault code F1, Temperature stop fault (no indication in DW20.1) The temperature rise is less than 5°C in ten minutes. The programme exits from the heating stage and continues in the process.
SERVICE 7. Tools 7.1 Tools The following tools are used for servicing dishwasher model DW20: Torx T25 T20 T10 Ring spanner 10 mm Box spanner 10 mm 7.
Register A P Adjustable foot 17 Airbreak 14 Auto wash 19 Pressure sensor 14 Pressure sensor fault 39 Programme 19 Pumping out fault 39 B Blocked filter 39 C Circulation fault 39 Circulation pump 12 Connection diagram 11 Connection to electricity 16 Connection to water 16 D Detergent and surfactant dispenser 13 Drain pump 13 Drainage 16 F Fan 13 Fault codes 39 Flow sensor 12 Flow valve 12 H Heating element 13 I Inlet valve 12 Installation 15 Intensive wash 19 L Lighting 13 Lower basket wash 19 M M
Notes 46
Notes 47
Notes 48 Art.
