Service manual Dishwashers Type: DW70
Contents 1. Introduction..................................................................................................................4 1.1 Models.................................................................................................................5 2. Technical data..............................................................................................................6 2.1 Technical information......................................................................................
INTRODUCTION 1. Introduction You are holding ASKO’s service manual for the DW70 generation of dishwashers. The DW70 dishwasher series is available in five different basic models, designated DW70.1, DW70.3, DW70.4, DW70.5 and DW70.C. On the next page, we present the various panels found on each type, making it easy to identify the different machines. The different models are named differently in different markets. The type designation is most important when identifying a particular machine model.
INTRODUCTION 1.1 Models DW70.1 The DW70.1 is available in two versions, with either one or two options. The machine has four set programs and the controls are on the front of the panel. DW70.3 The DW70.3 is available in two versions – with three and five options respectively. The machine has six set programs and the controls are on the top.. DW70.4 The DW70.4 has a number of different options. The machine has 14 set programs. The controls are on the top and the display (LCD) is on the top of the panel.
Technical data 2. Technical data 2.1 Technical information Height: Width: Depth: Weight: Water pressure: Connection: Max. rated power: * According to EN 50242 standard. ** See type plate. 6 823-870 mm (32-1/4” to 35-1/2”) = for 820 mm ma chines (XL) 863-910 mm (33-3/4” to 36”) = for 860 mm ma chines (XXL) 596 mm (23-5/8”) 570 mm (22-7/8”) 42 kg / 45 kg with water softener 0.03–0.2 MPa (0.3–2.
INSTALLATION 3. Installation Suggested machine installations The dishwasher can be installed built-in, completely freestanding or partially freestanding. CAUTION! Connections to electricity, water and drain must be performed by qualified professionals. A. Built-in The dishwasher can be installed under a worktop and integrated with the kitchen cupboards. Read the instructions in the user manual and the installation instructions for the actual machine type. B.
INSTALLATION Connection to water supply The supply pipe must be fitted with a stopcock. The stopcock should be positioned above the sink unit or at the front of the sink unit cabinet. The inlet pipe has a coupling with either a 1/2” or a 3/4” internal thread, depending on the country. Once the machine in installed: Open the stopcock to flush the pipe. Check that all connections are watertight. Electrical connection Machines fitted with a cable and plug must be connected to an earthed socket.
COMPONENT DESCRIPTION 4.Component description 4.1 Components and measurement values The specified resistance values apply at room temperature (about 20°C/68°F) Values within ±10% are considered normal. Article no. Position 8073779 8073780,81 8079504 8079505 8078096 8073801,02 8073803,04 8078080 EMC filter EMC filter Heater 1600 W 230 V Heater 1200 W 120 V Thermistor Combi disp. 230 V Combi disp. 120 V Circ. pump 220/240 V 50 Hz Circ..pump 220-240 V 50 Hz Circ..pump 120 V 60 Hz Circ..
COMPONENT INFORMATION Article no. Position Component Measurement value 0.65 kohm Softener salt water valve 120 V 0.65 kohm Softener mixer valve 120 V <10 kohm 8073830 Halogen bulb 5 W/12 V 1.1 kohm 8052778 Vax motor 0,44 kohm 8073850 Fan motor 230 V 0.18 kohm 8073848 Fan motor 120 V * The number is for a complete water softener; replacement salt and mixer valves are not available separately. 8078302* 8078302* 4.
COMPONENT INFORMATION Spray arm diverter Fan Note that the spray arms never rotate at the same time. The spray arms can report the following status: • Upper spray arm half or full pressure • Lower spray arm half or full pressure Depending on the program, dishwashing stage and options, the spray arms are set to various intervals and pressures. Detergent and rinse aid dispenser Certain machines are fitted with a spray arm diverter.
COMPONENT INFORMATION Door switch A micro switch detects when the door has been opened. The program is paused and power to certain components (motor, valves etc.) is cut. The program continues where it left off when the door is closed. Overflow cut-out The overflow cut-out comprises a float that triggers a micro switch. This switches off the inlet valve electrically and starts the drain pump. The protection remains in place even if the main power switch is turned off.
COMPONENT INFORMATION Turbidity sensor Machines with an auto program have a turbidity sensor that measures how cloudy the water is. The sensor comprises an LED and a phototransistor. Between these two is the dishwater. The less light that reaches the phototransistor, the cloudier the water. The sensor is calibrated during the last rinse of the auto program.
PROGRAMS AND CONTROL UNIT 5. Programs and control unit 5.1 Program Program Daily wash Heavy wash DW70.3 DW70.5 A A A A Sani*** Pots & Pans*** Normal wash A B B Mixed wash** (only with turbidity sensor) (only spray arm diverter) (only duo machines) A-F (program alternatives) Machine type DW70.1 Auto wash* * ** *** DW70.4 DW70.
PROGRAMS AND CONTROL UNIT 5.2 Time display Option DW70.1: The program progress lamps around the Start button light up as the program progresses (segment 1 for prewash, segments 1 and 2 for main wash and so on). Temperature DW70.4, DW70.5 When a program is selected the display indicates how long the program took the last time it was used. After the program starts, the time counts down in one-minute intervals (no recalculation during the program).
COMPONENT RADIO INTERFERENCE SUPPRESSION FILTER HEATING ELEMENT 1200W 120V HEATING ELEMENT 1600W 230V HEATING ELEMENT 2040W 230V THERMISTOR COMBINED DISPENSER 120V COMBINED DISPENSER 230V CIRCULATION PUMP 120V 60HZ CIRCULATION PUMP 230V 50HZ CIRCULATION PUMP 220V 60HZ DRAIN PUMP 120V 60HZ DRAIN PUMP 230V 50HZ DRAIN PUMP 230V 60HZ SPRAY ARM DIVIDER 120V 60HZ SPRAY ARM DIVIDER 230V 50/60HZ INLET VALVE SINGLE INCL. 120V INLET VALVE SAFETY INCL. 120V INLET VALVE SINGLE INCL. 230V INLET VALVE SAFETY INCL.
Program Quick wash 22'' SCS T-30º/35º (Eco/normal) 180'' T-30º/35º (Eco/normal) 120" (salt valve active 80") 3'' 30'' 40''/45'' ** 6" or 25'' * 7'' 25'' 80" cleaning softener *** 40/45'' 6" Upper spray arm Lower spray arm Heavy wash Delicate wash 17 30 50 10 30 15 30 10 20 50 90 10 30 30 50 10 10 45 70 10 20 10 10 10 10 low pressure High pressure Time in seconds for water divider action 30 10 50 40 15 10 30 20 50 10 90 70 Both (normal) 30 10 50 40 45 10 70 60 10 10 10 10 Upper bask
PROGRAMS AND CONTROL UNIT 5.5 Program flow description Presented below is the Quick program. If the component test in the service menu is not sufficient to identify a fault you can run this program and compare the results with the flow description below. If they are in agreement this indicates a correctly functioning control unit. Component Main wash Drain pump Time Comments 6 sec. 25 sec. if the previous program was cancelled with the Start/Stop button Inlet valve 40/45 sec.
PROGRAMS AND CONTROL UNIT 5.6 Settings DW70.1 L2 L1 L2 L3 L12 L6 START L11 S1 S3 L1 L4 PROGRAM Variant 1 L10 L6 Variant 2 L8 STOP S2 S4 L9 L7 START L11 S1 S2 L5 L12 L4 PROGRAM L8 STOP S4 L3 L7 L5 Panel type DW70.1, L = LED, S = Push button Variant settings When the power is switched on for the first time after replacing the control unit, the variant settings menu is displayed. L1 flashes: Variant 1 see above, with two options (temp, dry).
PROGRAMS AND CONTROL UNIT DW70.3 IR L12 S1 L1 L2 L3 L4 L5 L6 S3 L13 L15 L14 S4 S5 L16 S6 L7 L10 L8 L11 L17 S7 S2 Panel type DW70.3, L = LED, S = Push button, Variant settings When the power is switched on for the first time after replacing the control unit, the variant settings menu is displayed. 1. Press the Program button (S1) until the desired variant is selected: L1 flashes: Variant1 = Time saver L2 flashes: Variant2 = Super rinse option L3 flashes: Variant3 = Tab 2.
PROGRAMS AND CONTROL UNIT Child safety catch Activating the settings menu: 1. 2. 3. 4. 5. 6. Turn off the main power switch (I/0) Wait at least 5 seconds Press and hold the temperature and drying option buttons (S4 and S6) Switch on the main power switch (I/0) Release the temperature and drying option buttons (S4 and S6) Use the Program button (S1) to select the status L1 unlit: Child safety catch deactivated L1 lit: Child safety catch activated Confirm your selection by pressing Start (S2).
PROGRAMS AND CONTROL UNIT DW70.4 Panel type DW70.4, L = LED, S = Push button Special settings Turn on the main power switch, press the Menu button (S4) a few times until the special settings are displayed. The following settings are available: Language, child safety catch, program end signal, button tones, temperature (C or F), water hardness setting. This menu can also be used to view information about how many cycles the machine has completed and total water consumption.
PROGRAMS AND CONTROL UNIT DW70.5 Panel type DW70.5, L = LED, S = Push button, D = Display Variant settings When the main power switch is switched on for the first time after replacing the control unit, the variant settings menu is displayed. 1.
DW70.C Total reset To reset the machine to its factory settings. 1. 2. 3. 4. 5. Panel type DW70.3, L = LED, S = Push button, Water hardness setting Activate settings menu. : 1. Turn off the machine using the main power switch.(I/0) 2. Wait for at least 5 seconds. 3. Press and hold the start button (S2) 4. Turn on the machine using the main power switch(I/0) 5. Realese the button (S2) 6.
PROGRAMS AND CONTROL UNIT 5.7. Service menu Activating the service menu DW70.1 1. 2. 3. 4. 5. Turn off the main power switch (I/0) Wait at least 5 seconds Press and hold the Program and Start buttons (S1 & S2) Switch on the main power switch (I/0) Release the Program and Start buttons (S1 & S2) L7 flashes Press S1 to activate the component test. These are activated in order after each button press: 1.
PROGRAMS AND CONTROL UNIT DW70.4 1. 2. 3. 4. 5. Turn off the main power switch (S5) Wait at least 5 seconds Press and hold the Program and Start buttons (S1 and S2) Switch on the main power switch (S5) Release the Program and Start buttons (S1 & S2) The service menu has four submenus: 1. 2. 3. 4.
PROGRAMS AND CONTROL UNIT DW70.5 1. 2. 3. Turn off the main power switch (I/0). Wait at least 5 seconds. Press and hold the Program and Start buttons (S1 and S2). 4. Switch on the main power switch (I/0). 5. Release the Program and Start buttons (S1 and S2) when the LEDs have lit. The most recent fault is shown in display D2 and D3. Error messages are erased by a total reset. Press S1 to activate the component test. These are activated in order after each button press and are shown in display D3. 1.
TROUBLESHOOTING 6. Troubleshooting 6.1 Dishwashing results Check the following points if the dishes are not clean (always begin by checking any fault codes and the most recent fault indication in the service menu): • That the customer is using the right dishwashing program. • If heavily soiled dishes are being loaded, such as pots or oven dishes, choose a heavier program. • Check that the customer is using a suitable dishwashing detergent, preferably one with proven good results.
TROUBLESHOOTING 6.3 Water level DW70 When servicing a DW70 dishwasher 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 drain the water a few times before checking the level. Overflow level = 4.7 litres Without spray arm diverter = 3.2 litres (1.5 mm above the level) With spray arm diverter = 2.8 litres (0.
TROUBLESHOOTING 6.4 Fault indication DW70.1 L2 L1 L3 L12 L2 L7 L4 PROGRAM L1 START L11 S1 L10 L5 L6 S3 L9 START L11 L8 STOP S2 S4 L10 L5 L6 L7 L4 S1 S2 S4 L12 PROGRAM L8 STOP L3 L9 DW70.3 IR L12 S1 L1 L2 L3 L4 L5 L6 S3 L13 L15 L14 S4 S5 L16 S6 L7 L10 L8 L11 L17 S7 S2 DW70.4 DW70.5 DW70.C L - LED, S – Push button, F – Fault code or plain text on display, D - Display The door is open 70.1 70.3 70.
TROUBLESHOOTING 6.4 Fault codes NB: Some DW70.3 and DW70.4 models may have a status lamp that always flashes together with the current fault indicator. If the customer has activated the sound option an audible signal is also heard when a fault is indicated. Temperature stop fault (DW70.1 no indication) 70.3 L1 flashes 70.4 “Temp. stop fault” 70.5 Fault code “F1” 70.C Fault code “ F2” Temperature increase less than 5°C in ten minutes. Program continues with the process. Only indicated in service menu.
TOOLS Turbidity sensor fault (DW70.1 no indication) 70.3 L1 and L5 flash 70.4 “Turbidity sensor fault” 70.5 Fault code “FA” 70.C Fault code “FA” Only indicated in service menu. The machine assumes high turbidity in case of “uncertainty” in the auto program. Check: Water quality, filters, turbidity sensor and drain system. Spray arm diverter fault (DW70.1 no indication) 70.3 L1 and L6 flash 70.4 “Diverter fault” 70.5 Fault code “FB” 70.C Fault code “FB” Position switch always closed or open.
Article no. 80 836 38 rev.
