Asko DW90 Series User manual

Service manual
Dishwasher - DW90

Service manual DW90
2

Type: DW90
Service manual
Contents
Updates ..................................................................................................................................................................................................................................................4
Introduction .........................................................................................................................................................................................................................................5
Troubleshooting strategy ............................................................................................................................................................................................................6
Types ........................................................................................................................................................................................................................................................7
Technical data ......................................................................................................................................................................................................................................8
Component description ...............................................................................................................................................................................................................9
Components and measurement values .........................................................................................................................................................................9
Components and function description ......................................................................................................................................................................10
Programs and control unit........................................................................................................................................................................................................ 18
Wiring diagram .........................................................................................................................................................................................................................18
Program flow description....................................................................................................................................................................................................20
Troubleshooting .............................................................................................................................................................................................................................. 22
Dishwashing results ...............................................................................................................................................................................................................22
Common faults .......................................................................................................................................................................................................................... 22
Water level DW90 ..................................................................................................................................................................................................................23
Fault indicators .......................................................................................................................................................................................................................... 24
Fault and information codes ..............................................................................................................................................................................................25
DW90.1 ................................................................................................................................................................................................................................... 25
DW90.2 ................................................................................................................................................................................................................................... 26
DW90.3 ................................................................................................................................................................................................................................... 27
Service menu and settings ........................................................................................................................................................................................................28
Service menu DW90.1 .........................................................................................................................................................................................................28
Service menu DW90.2 .........................................................................................................................................................................................................30
Service menu DW90.3 .........................................................................................................................................................................................................32
Settings ...........................................................................................................................................................................................................................................34
Tools .................................................................................................................................................................................................................................................34
Special tools ................................................................................................................................................................................................................................ 34
Service and installation ............................................................................................................................................................................................................... 36
Increased working space during service ..................................................................................................................................................................... 36
Overflow guard wiring ..........................................................................................................................................................................................................37

Service manual DW90
4
Rev Date Description Initials
01 2011-04-15 First version FH
02 2011-05-12 Front display 90.2, service menu 90.1 and 90.2 and also some minor text updates FH
03 2011-05-27 90.1 OTHER included FH
04 2011-06-08 Instruction for ”Increased working space during service” updated FH
05 2011-11-29 Updated wiring diagram and added information about Anti siphon ISC
06 2012-02-02 Updated service menu for 90.2. Changed description how to set TDE & HWC. AN
07 2012-03-16 Instructions updated for 90.2. Store program added. EH
08 2012-04-23 Service menu for 90.2 updated. Description added for Total reset (TDE & HWC). EH
09 2012-05-21 Information for Region settings updated. EH
10 2012-09-06 Program flow description for the Daily wash program included. EH
Updates

Service manual DW90
5
Introduction
You are holding the Service manual for the DW90 generation of dishwashers.
The DW90 dishwasher series is available in three different basic models, designated DW90.1,
DW90.2 and DW90.3. In the Types section, 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. This information can be found on the serial number plate on the right of the inside of the
door, where the machine’s model designation is specified.
The first two digits of the serial number specify the year of manufacture
while the third and fourth digits specify the week of manufacture. The
remaining digits form the sequential number.
It should be easy to service a dishwasher. It is important that you, as a service technician, are
afforded conditions that enable you to work in an efficient and satisfactory way. Our hope is that
this service manual will prove a useful tool in your daily work.
Asko Appliances AB
SE-534 82 Vara
Sweden
OPERATING INSTRUCTIONS
Always have the operating instructions for the machine available during service
SERIAL NO
MODEL
TYPE
Typbeteckning Artikelnummer
Löpnummer
År Vecka
M o d e l l n a m n
Model D5454

Service manual DW90
6
Troubleshooting strategy
Troubleshooting is an important part of the service callout, and as such we have drawn up a
troubleshooting strategy that describes, in broad terms and step by step, what you need to do to find
and diagnose faults arising in our machines.
• Ask the customer to describe the problem.
• Check whether the customer’s description matches the reported fault.
• Check that the machine is correctly installed:
- Electrical connection - Drainage
- Water connection - Machine correctly levelled
Fault
found?
Incorrect installation or external factors that affect performance and functionality (for
example, water pressure, electrical supply, drainage).
The machine operates normally. No deviations can be found. The customer probably
needs to be informed about proper use of the machine. If necessary, also inform the
customer about the warranty conditions and the fact that the customer will be charged
for the service call.
Yes
Open the service menu:
1. Check the settings
2. Run a test cycle
3. Note any fault codes
If the above actions do not uncover the fault:
• Conduct general troubleshooting. Use the documentation available at ServiceSaver
(service manuals, service memos, wiring diagrams and other documents).
Yes
No
No
Fault
diagnosed?
Repair and check
function/safety.
Carry out the actions
suggested by technical
support.
Satisfied customer!
OK?
No
Yes
No
Yes
Fault
found?
Contact technical support
for assistance.

Service manual DW90
7
DW90.2
The machine has 9 set programs, but can be specified with up to 16 programs. The touch buttons
and display are usually found on the top. Certain variants are supplied with a display on the front.
Types
DW90.1 - BRAND ASKO
The machine has 6 set programs and 2, 3 or 5 options that can vary depending on the variant.
The touch buttons and display are found on the front of the panel. The main power switch is on
the top.
PROG
START
STOP
DW90.3
The machine has 16 set programs and the touch buttons and display are on the top. The number
of options and settings vary depending on the specification of the machine.
S TA R T
PROG STOP
Display on the front
5454 Variant 6OEM Auto + Time Saver - DW90.1PanelCylinda5OptionsAutoProgrammeTimeSaver
5424 Variant2OEM - DW90.1PanelCylinda2Options
5434 Variant4OEM Auto - DW90.1PanelCylinda3OptionsAutoProgramme
5434 Variant4OEM Daily - DW90.1PanelCylinda3OptionsDailyProgramme
DW90.1 - BRAND OTHER
The machine has 6 set programs and 2, 3 or 5 options that can vary depending on the variant.
The touch buttons and display are found on the front of the panel. The main power switch is on
the top.

Service manual DW90
8
Height: 823-870 mm (32-1/4” to 35-1/2”) = for 820 mm machines (XL)
863-910 mm (33-3/4” to 36”) = for 860 mm machines (XXL)
Width: 596 mm (23-5/8”)
Depth: 550 mm (22”)
Weight (freestanding): 56 kg/59 kg (124 lbs/130 lbs) with water softener (XL)
57 kg/60 kg (126 lbs/132 lbs) with water softener (XXL)
Weight (integrated): 49 kg/52 kg (108 lbs/115 lbs) with water softener (XL)
50 kg/53 kg (110 lbs/117 lbs) with water softener (XXL)
Water pressure: 0.03–1.0 MPa (0.3–10 kp/cm2) (4.2-140 psi)
Connection: 1-phase, 230 V, 50/60 Hz, (10 A/16 A)**
1-phase, 120 V, 60 Hz, (15 A)**
3-phase, 400 V, 50/60 Hz, (10 A) **
Max. rated power: 1700 W (230 V)**
1300 W (120 V)**
2200 W (400 V)**
* According to EN 50242 standard.
** See type plate.
Technical data

Service manual DW90
9
Components and measurement values
The specified resistance values apply at room temperature (about 20°C/68°F)
Values within ±10% are considered normal.
Component description
Article no. Position Component Measurement
value
8073779 EMC-filter with inductor 680 kohm
8083041 Filter with screwplint 1 Mohm
8079504 Heating element 1600 W 230 V 32 ohm
8079505 Heating element 1200 W 120 V 12 ohm
8078096 Thermistor 60 kohm
8083094 Combi disp. 230 V 1,32 kohm
8083095 Combi disp. 120 V 285 ohm
8078080
8078080
Circ.pump 220-240 V 50 Hz,
47 L (12.4 gallon)/min
Primary winding 115 ohm
Circ.pump 220-240 V 50 Hz Auxiliary winding 260 ohm
8078082
8078082
Circ.pump 120 V 60 Hz,
47 L (12.4 gallon)/min
Primary winding 31,4 ohm
Circ.pump 120 V 60 Hz Auxiliary winding 76 ohm
8078087 Drain pump 200-240 V 50 Hz,
16 L (4.2 gallon)/min
148 ohm
8078089 Drain pump 120V 60 Hz,
16 L (4.2 gallon)/min
26 ohm
8078084 2-3 Spray arm diverter 230 V 50/60 Hz 8,5 kohm
8078085 2-3 Spray arm diverter 120 V 60 Hz 2,6 kohm
8079502 Inlet valve single 200-240 V,
4 L (1 gallon)/min
3,9 kohm
8079503 Inlet valve single 120 V,
4 L (1 gallon)/min
0,95 kohm
8079500 Inlet valve security 220-240 V,
4 L (1 gallon)/min
2 kohm
8079501 Inlet valve security 120 V,
4 L (1 gallon)/min
0,5 kohm
8078090*
8078090*
Water softener salt valve 220-240 V 3 kohm
Water softener mix valve 220-240 V 2,33 kohm
8078302*
8078302*
Water softener salt valve 120 V 0,65 kohm
Water softener mix valve 120 V 0,65 kohm
8073830 Halogen lamp 5 W/12 V <10 kohm
8084147 Thermo Actuator 110-240 V 0,85-1,2 kohm
8089578 Fan motor 230 V 0,85 kohm
8089580 Fan motor 120 V 185 ohm
* The number is for a complete water softener; replacement salt and mixer valves are not available separately.

Service manual DW90
10
Inlet valve
The inlet valve has an electrical connector
that is coded to ensure it is not mixed up. It is
fitted with a filter, which can be removed for
cleaning. Both single and safety valves are used
as inlet valves. The inlet valve contains a filter
to stop particles then a flow limiter to limit
the flow to a maximum of 4 L (1 gallon)/min.
It opens when the water pressure exceeds 0.3
bar (4.3 psi) and provides full flow at about 2
bar (29 psi). It has a pressure range of 0.3 bar
(4.3 psi) to 10 bar (145 psi). The inlet valve is
fitted to the air gap and can be replaced from
the rear of the machine.
Purpose: To ensure that the machine
is supplied with water for the different
dishwashing cycles.
Safety valve
The safety valve has two independent valve seats,
each controlled by a separate electromagnet. The
valve seats are connected in series. This doubles
the safety factor. The electromagnets are also
connected in series (electrically), which means each
magnet’s rated voltage is half the mains voltage (e.g.,
a 230 V valve = 2 x 115 V coils)
Single valve
The single valve comprises an electromagnet
and a valve seat.
Components and function description
Here we describe the function and
specification of the most important
components. Certain components are found
only in more highly specified machines or in
particular markets. See the Troubleshooting
section for fault and information codes.
CU, Control Unit
The CU, or Control Unit, is a unit that functions
as both a control panel and a logic component.
The control panel is fitted with a display and touch
buttons for selecting programs, options and Start/
Stop. The control panel is an integrated part of
the CU and cannot be replaced separately. The
logic component manages functions needed for
dishwashing programs and diagnosis. The CU
has an internal power supply for the logic. In the
event of a fault, the CU can diagnose a number of
components and functions and display fault codes.
To facilitate troubleshooting the service menu
includes a component diagnostics function, which
activates the outputs in a particular sequence.
Accelerometer
The control unit in DW90.2 contains an accelerometer,
a sensor that senses position and acceleration. It controls
the touch buttons and the brightness of the light. The
accelerometer turns off at a specific angle to avoid causing
a distraction when seen from the worktop. It is calibrated
when the door is closed.
If this symbol appears on the display
the door is not open enough. Open
the door until the display lights up.
Component description

Service manual DW90
11
Flow meter
Flow meter
The flow meter is fitted in the air gap and
cannot be replaced separately. It comprises an
impeller that is rotated by the flow of water
from the inlet valve. The impeller is fitted with
two magnets that affect a sensor, a so-called
reed switch. This is connected to the control
unit via a wire and provides the control unit
with information on the amount of water
entering the machine. In order for the flow
sensor to function normally the incoming
water pressure must be at least 2 bar (29 psi).
Output signal: 220 pulses per liter (0.26 gallon)
of water flowing through.
Circulation pump
The circulation pump comprises an asynchronous
motor with a capacitor and a pump housing with
an impeller. The impeller and seals cannot be
replaced separately, rather the entire pump must
be replaced. The circulation pump can be rated
220-240V, 50/60Hz, as well as 120V, 60Hz.
Purpose: To provide the spray system with the
water pressure necessary for the dishwashing
process.
Component description
Spray arm diverter
The spray arm diverter is under the spray arm hub
on the underside of the cleaning compartment.
The water from the circulation pump flows
through the spray arm diverter, which alternates
the flow of water between the upper and lower
spray arms. The spray arm diverter comprises a
synchronous motor that drives a disc valve. The
disc has a smaller opening and a larger opening and
as it rotates it distributes the water to the spray
arms at low or high pressure. Information on the
disc position is sent to the control unit. The spray
arm diverter is calibrated when the main power
switch is turned on.
Purpose: To distribute spray water to the spray
arms in accordance with the program specification.
Heating element
The heating element is of the flow-through
type and is fitted between the bottom drain
and the suction connector of the circulation
pump. It comprises a pipe with a heating coil.
One side of the heating coil is fitted with an
overheating cut-out with a trigger temperature
of 98°C (208°F) and an automatic reset. The
other side is fitted with a safety fuse that blows
at 229°C (444°F). The element is replaced
from the rear of the machine by first moving
the circulation pump out of the way.
Purpose: To heat the dishwater to the correct
temperature during the prewash/main wash and
final rinse.

Service manual DW90
12
Component description
Drain pump
The drain pump is fitted to the bottom drain and
can be replaced from the front of the machine. In
the bottom drain, under the filters, is a cleaning
plug which when removed enables the customer
to clean the pump housing. In the event of a
blockage the pump changes its direction of
rotation to try to clear the blockage.
Purpose: To drain the water from the cleaning
compartment in accordance with the program
specification and in case of overflow.
Detergent and rinse aid dispenser
The dispenser has one container for detergent
and one container for rinse aid. The containers
are opened by activating the electromagnet
found on the lock of each container. When
first activated detergent is dispensed and when
activated a second time rinse aid is dispensed.
A weight (which is activated when the door
is opened for loading and unloading) resets
the mechanism so that the dispenser always
dispenses detergent first when a new program
is started.
Fan
The fan is fitted to the top edge of the inner
door and comprises a fan motor, a fan housing,
a venting duct, a double-sided impeller, a
damper and a Wax motor that controls the
damper function. The fan works throughout
most of the dishwashing program in order to
reduce the formation of condensation between
the machine’s inner and outer doors and to
eliminate condensation between the outer door
and the cover door on fully integrated machines.
During the drying program the fan sucks in
cold, dry air from outside via the duct in order
to cool it. The Wax motor opens the damper
slowly allowing the fan to suck in the hot, damp
air from the cleaning compartment. The two air
flows are mixed in the duct where the moisture
condenses into water that is routed into the
cleaning compartment. The air is vented through
a nozzle under the outer door.
Purpose: To vent the hot, damp air from
the cleaning compartment so that the dishes
dry during the drying program and to prevent
condensation forming between the machine’s
inner and outer doors.
Cables
The machine is fitted with coded connectors
to prevent incorrect wiring. The cables comply
with the Rast 2.5 and Rast 5 standards.

Service manual DW90
13
Component description
Turbo Drying Express (TDE)
Certain machines are equipped with Turbo Drying
Express, which provides more efficient drying,
among other things. Hot air is blown into the cleaning
compartment and used for drying and warming
crockery. The air is vented by the normal fan.
The nozzle that blows the hot air is fitted to the
side wall of the cleaning compartment.
Main power switch
The main power switch has 2 pins and breaks the
phase and the earth. However, power to the filters,
overflow guard, drain pump and inlet valve is not
cut when the main power switch is turned off.
On the DW90.2 the main power switch is
electronic and is integrated with the control unit.
The machine switches to standby when the main
power switch is deactivated and when the door is
closed. Standby is deactivated when the main power
switch is activated and when the door is opened.
EMC filter with inductor
The filter is fitted at the front of the bottom
plate and consists of a number of coils,
condensers and resistors.
Purpose: To eliminate electromagnetic
interference to and from the machine.
Door switch
A micro switch detects when the door has been
opened. The program is paused and power to
certain components (circulation pump, valves
and more) is cut. The program continues where
it left off when the door is closed. If a program
is running the machine indicates that the door is
open.
Purpose: To prevent the machine from running
while the door is open.
Water softener
Certain machines are fitted with a water
softener. The water softener is under the cleaning
compartment and has a cap for topping up the salt in
the bottom of the cleaning compartment. The water
softener has two chambers, one for salt and one for
ion exchange resin. It also has two electromagnetic
valves (a mixer valve and a salt valve) which control
the water flow to the salt chamber and through
the ion exchange resin. When filling with water,
the water flows through the chamber containing
the ion exchange resin where the hard water is
softened. The mixer valve is used to control whether
the incoming water flows through or bypasses the
chamber containing ion exchange resin depending
on the water hardness setting. The salt valve is used
to fill the chamber containing the ion exchange resin
with water saturated with salt from the salt chamber
when the ion exchange resin needs to be recharged.
When the salt valve opens the water pocket in the
air gap is emptied, with the water passing through the
salt chamber and into the chamber containing the ion
exchange resin.

Service manual DW90
14
Component description
Air gap
The air gap is found next to the cleaning
compartment. It comprises channels through
which the incoming water flows into the
cleaning compartment. These channels also
contain an anti-backflow device and the
flow sensor through which the water passes.
Certain models are equipped with a water
pocket that collects water used for the water
softener (only machines with a water softener).
The air gap also works as a channel of air taken
in during the drying phase, as well as a pressure
relief for excess air when opening and closing
the door. On machines with Turbo Drying
Express (TDE) a lid is mounted on the inside
of the air gap. If there is condensation in the
kitchen interiors, make sure the lid is correctly
fitted.
Purpose: To prevent dirty water from the
cleaning compartment being sucked back into
the water supply, and lead air to and from the
container.
Thermistor
The thermistor for temperature measurement
is located at the front edge of the bottom
drain. The thermistor measures and controls
the water temperature, which can be up to
70°C (158°F). If the thermistor short-circuits or
loses contact with the CU, or of the thermistor
does not register a temperature increase of
5°C (41°F) within 10 minutes of the element
being activated, the element is switched off and
a fault code is indicated. This is only indicated
in the service menu. The thermistor is of the
NTC type (Negative Temperature Coefficient),
i.e. its resistance decreases as temperature
increases.
Purpose: To control the water temperature during
the dishwashing process.
Light
The light is a 5 W/12 V halogen bulb powered
by the control unit via a micro switch. The
lamp is activated when the door is opened
more than 5° and automatically deactivated
when the door has been open for more
than 30 minutes. The control unit features
protective components that limit the current
to the light in case of a short circuit or if a bulb
with too high a power rating is fitted. The
bulb can be replaced from inside the cleaning
compartment.

Service manual DW90
15
Component description
Pressure sensor
The pressure sensor is connected to the
pressure chamber in the bottom drain. It
measures the pressure, which corresponds to
the water level in the machine. If the water level
in the machine is too high (for five consecutive
seconds) the drain pump starts and all other
components are switched off. When the correct
level is reached, the program continues where
it left off. If the level sensor generates an output
signal of <1 VDC during the prewash (indicating
a blocked filter), an additional prewash is
activated with an SCS step.
The level sensor also controls the draining
time (can be extended from 20 seconds to a
maximum of 2 min). The sensor also checks the
need to refill (such as if a bowl fills with water).
Purpose: To prevent overflow, to detect
a ‘blocked filter’, to when necessary refill the
machine (such as if a bowl has filled with water)
and to control the draining time.
Overflow guard
The overflow guard is integrated with the bottom
drain. This overflow guard consists of a micro switch
activated by a float if water collects on the machine’s
bottom plate. The micro switch is normally closed.
When it is activated, it breaks the circuit to the CU,
the drain pump starts, the program is interrupted
and the machine indicates an overflow.
Purpose: To provide protection from any water
leaks or flooding from the machine.
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. At different points during the
auto program the output signal from the turbidity
sensor provides data used to determine how the
program will continue (number of prewashes,
temperature, program time, number of rinses and
so on). If the turbidity sensor fails, the machine
assumes the water is “very cloudy”, which results in
a longer program time, with prewashes, additional
rinses and so on.
The turbidity sensor is located at the front edge of
the bottom drain and is replaced from the front of
the machine.
Purpose: To sense how dirty the dishes are and
to provide the control unit with information about
which program is best suited to the dishes.

Service manual DW90
16
Component description
Heating Water Circuit (HWC)
A certain type of machine is adapted for
connection to the building’s existing hot water
supply to reduce energy consumption.
The function settings for these machines are
changed via the service menu.
Humidity sensor
The humidity sensor is located in the fan
housing. The sensor is of the capacitive type
and measures relative humidity. The humidity
sensor measures the ambient humidity before
the drying program begins and controls the
drying time until it senses a humidity level close
to that before the drying program began.
Purpose: To make sure the drying program
runs as long as necessary to ensure a
satisfactory drying result.
Status Light™
To the right at the bottom edge of the door
is a light that communicates in three different
colours to indicate the machine’s status.
BLUE - The program has started, but you
can still load more dishes into the machine (no
detergent in the machine).
RED - Constant red light; loading more dishes
into the machine not recommended (detergent
in the machine). Flashing red light indicates a
fault. This can mean a water inlet fault, leaking
valve, overflow or water outlet fault. In case of
fault, see the troubleshooting section.
GREEN - The program has finished, unload
the machine.

Service manual DW90
17
Anti siphon
Dishwashers equipped with Anti-Siphon device can be installed in an elevated installation.
The drainage hose can run to a lower level than the bottom of the dishwasher without emptying the
dishwasher of water during the wash cycle.
The Anti-Siphon device acts as a pressure equalizer which ensures that over- or under-pressure never
occurs in the machine. This prevents the machine from either being emptied of water or sucking water
from the drain. As an extra security measure the drain hose is fitted with a check valve.
The anti-siphon device is placed
on the left side of the dishwasher.
The drainage hose may be extended by a maximum of 3m (the total length of the drainage hose
must not exceed 4,5m). Any joins and connecting pipes must have an internal diameter of at least
14mm.
Component description

Service manual DW90
18
Wiring diagram
Programs and control unit
FORMAT A4
This document must not be copied without our written pemission, and the contents thereof must not be imparted to a third party nor be used for any unauthorized purpose. Contravention will be prosecuted. Asko Appliances AB
CIRCUIT DIAGRAM DW90.1, DW90.1OEM, DW90.2, DW90.C, DW90.3
80 840 68-01
DP
FN 1
F
DR
HE
CP
IV
VAX
MS
CD
RAS
DS
CP
DIV
SV
PS
1 2 3
TS
HS
IS
MFM
L
N
WIRES IN ALL MACHINES
INTERNAL CONNECTION WIRES IN SOME MACHINES
HL 1/C
2
SL
1 2 345 6 78
10
AP VMG LB KD FL VAX CP IV SV MV DIV BE GS TS FM NTC
HS
EL
TB
1/C
3/4
2
FS
1/C
3/4
COMBI DISPENSER CIRCULATION PUMP WATER DIVERTER VALVE DRAIN PUMP DOOR DOOR SWITCH FILTER FLOW METER FAN DOOR FAN BOTTOM FLOAT SWITCH HEATING ELEMENT HEATING ELEMENT PTC HALOGEN LAMP HUMIDITY SENSOR ILLUM. SWITCH INLET VALVE I2C MAIN SWITCH MIX VALVE PRESSURE SENSOR RINSE AID SENSOR STATUS LIGHT SALT SENSOR SALT VALVE THERMISTOR TURBIDITY SENSOR UART VAX ACTUATOR HOT WATER CIRCUIT
KD/CD:
CP:
DIV:
AP/DP:
DR:
LB/DS:
F:
FM:
FL/FN 1:
FAN/FN 2:
FS:
EL/HE:
HE (PTC):
BE/HL:
HS:
IS: IV:
I2C:
TB/MS:
MV:
TS/PS:
VMG/RAS:
SL:
SG/SS:
SV:
NTC/TH:
GS/TS:
UART:
VAX:
HWC:
RESISTANCE 1 MOHM 12 OHM 32 OHM 25 OHM 60 KOHM 0,28 KOHM 1,32 KOHM 32 OHM 110 OHM 56 OHM 25 OHM 150 OHM 85 OHM 2.6 KOHM 8,5 KOHM 0.95 KOHM 0.5 KOHM 3,9 KOHM 2 KOHM 0,65 KOHM 0,65 KOHM 3 KOHM 2,3 KOHM <10 KOHM 1.1 KOHM 0.18 KOHM 0,85 KOHM 0,22 KOHM 0,90 KOHM
RESISTANCES AT ROOM TEMPERATURE (CA. 20°C/68°F) VALUES WITH +/-10% ARE REGARDED AS NORMAL
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. 230V SALT VALVE 120V MIX VALVE 120V SALT VALVE 230V MIX VALVE 230V HALOGEN LAMP 5W 12V WAX MOTOR FAN MOTOR 120V FAN MOTOR 230V FAN MOTOR 2 120V FAN MOTOR 2 230V
DW90.1, DW90.1OEM, DW90.2, DW90.C, DW90.3
SL
HE
MV
I2C
UART
TH
SS
SG
9
14
FAN
PTC
HE (PTC)
FN2
HWC
TDE
FORMAT A4
This document must not be copied without
our written pemission, and the contents
thereof must not be imparted to a third party
nor be used for any unauthorized purpose.
Contravention will be prosecuted.
Asko Appliances AB
CIRCUIT DIAGRAM DW90.1, DW90.1OEM, DW90.2, DW90.C, DW90.3
80 840 68-01
DP
FN 1
F
DR
HE
CP
IV
VAX
MS
CD
RAS
DS
CP
DIV
SV
PS
1 2 3
TS
HS
IS
MFM
L
N
WIRES IN ALL MACHINES
INTERNAL CONNECTION
WIRES IN SOME MACHINES
HL 1/C
2
SL
1 2 345 6 78
10
AP VMG LB KD FL VAX CP IV SV MV DIV BE GS TS FM NTC
HS
EL
TB
1/C
3/4
2
FS
1/C
3/4
COMBI DISPENSER
CIRCULATION PUMP
WATER DIVERTER VALVE
DRAIN PUMP
DOOR
DOOR SWITCH
FILTER
FLOW METER
FAN DOOR
FAN BOTTOM
FLOAT SWITCH
HEATING ELEMENT
HEATING ELEMENT PTC
HALOGEN LAMP
HUMIDITY SENSOR
ILLUM. SWITCH
INLET VALVE
I2C
MAIN SWITCH
MIX VALVE
PRESSURE SENSOR
RINSE AID SENSOR
STATUS LIGHT
SALT SENSOR
SALT VALVE
THERMISTOR
TURBIDITY SENSOR
UART
VAX ACTUATOR
HOT WATER CIRCUIT
KD/CD:
CP:
DIV:
AP/DP:
DR:
LB/DS:
F:
FM:
FL/FN 1:
FAN/FN 2:
FS:
EL/HE:
HE (PTC):
BE/HL:
HS:
IS:
IV:
I2C:
TB/MS:
MV:
TS/PS:
VMG/RAS:
SL:
SG/SS:
SV:
NTC/TH:
GS/TS:
UART:
VAX:
HWC:
RESISTANCE
1 MOHM
12 OHM
32 OHM
25 OHM
60 KOHM
0,28 KOHM
1,32 KOHM
32 OHM
110 OHM
56 OHM
25 OHM
150 OHM
85 OHM
2.6 KOHM
8,5 KOHM
0.95 KOHM
0.5 KOHM
3,9 KOHM
2 KOHM
0,65 KOHM
0,65 KOHM
3 KOHM
2,3 KOHM
<10 KOHM
1.1 KOHM
0.18 KOHM
0,85 KOHM
0,22 KOHM
0,90 KOHM
RESISTANCES AT ROOM TEMPERATURE (CA. 20°C/68°F)
VALUES WITH +/-10% ARE REGARDED AS NORMAL
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. 230V
SALT VALVE 120V
MIX VALVE 120V
SALT VALVE 230V
MIX VALVE 230V
HALOGEN LAMP 5W 12V
WAX MOTOR
FAN MOTOR 120V
FAN MOTOR 230V
FAN MOTOR 2 120V
FAN MOTOR 2 230V
DW90.1, DW90.1OEM, DW90.2, DW90.C, DW90.3
SL
HE
MV
I2C
UART
TH
SS
SG
9
14
FAN
PTC
HE (PTC)
FN2
HWC
TDE

Service manual DW90
19
FORMAT A4
This document must not be copied without
our written pemission, and the contents
thereof must not be imparted to a third party
nor be used for any unauthorized purpose.
Contravention will be prosecuted.
Asko Appliances AB
CIRCUIT DIAGRAM DW90.1, DW90.1OEM, DW90.2, DW90.C, DW90.3
80 840 68-01
DP
FN 1
F
DR
HE
CP
IV
VAX
MS
CD
RAS
DS
CP
DIV
SV
PS
1 2 3
TS
HS
IS
MFM
L
N
WIRES IN ALL MACHINES
INTERNAL CONNECTION
WIRES IN SOME MACHINES
HL 1/C
2
SL
1 2 345 6 78
10
AP VMG LB KD FL VAX CP IV SV MV DIV BE GS TS FM NTC
HS
EL
TB
1/C
3/4
2
FS
1/C
3/4
COMBI DISPENSER
CIRCULATION PUMP
WATER DIVERTER VALVE
DRAIN PUMP
DOOR
DOOR SWITCH
FILTER
FLOW METER
FAN DOOR
FAN BOTTOM
FLOAT SWITCH
HEATING ELEMENT
HEATING ELEMENT PTC
HALOGEN LAMP
HUMIDITY SENSOR
ILLUM. SWITCH
INLET VALVE
I2C
MAIN SWITCH
MIX VALVE
PRESSURE SENSOR
RINSE AID SENSOR
STATUS LIGHT
SALT SENSOR
SALT VALVE
THERMISTOR
TURBIDITY SENSOR
UART
VAX ACTUATOR
HOT WATER CIRCUIT
KD/CD:
CP:
DIV:
AP/DP:
DR:
LB/DS:
F:
FM:
FL/FN 1:
FAN/FN 2:
FS:
EL/HE:
HE (PTC):
BE/HL:
HS:
IS:
IV:
I2C:
TB/MS:
MV:
TS/PS:
VMG/RAS:
SL:
SG/SS:
SV:
NTC/TH:
GS/TS:
UART:
VAX:
HWC:
RESISTANCE
1 MOHM
12 OHM
32 OHM
25 OHM
60 KOHM
0,28 KOHM
1,32 KOHM
32 OHM
110 OHM
56 OHM
25 OHM
150 OHM
85 OHM
2.6 KOHM
8,5 KOHM
0.95 KOHM
0.5 KOHM
3,9 KOHM
2 KOHM
0,65 KOHM
0,65 KOHM
3 KOHM
2,3 KOHM
<10 KOHM
1.1 KOHM
0.18 KOHM
0,85 KOHM
0,22 KOHM
0,90 KOHM
RESISTANCES AT ROOM TEMPERATURE (CA. 20°C/68°F)
VALUES WITH +/-10% ARE REGARDED AS NORMAL
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. 230V
SALT VALVE 120V
MIX VALVE 120V
SALT VALVE 230V
MIX VALVE 230V
HALOGEN LAMP 5W 12V
WAX MOTOR
FAN MOTOR 120V
FAN MOTOR 230V
FAN MOTOR 2 120V
FAN MOTOR 2 230V
DW90.1, DW90.1OEM, DW90.2, DW90.C, DW90.3
SL
HE
MV
I2C
UART
TH
SS
SG
9
14
FAN
PTC
HE (PTC)
FN2
HWC
TDE

Service manual DW90
20
Program flow description
If the component test in the service menu is not sufficient to identify a fault you can run a
program and compare the results with the flow description below. If they are in agreement this
indicates a correctly functioning control unit.
Presented below is the Daily wash program, no options selected (DW90.1).
Programs and control unit
Step Component Time Comment
Prewash
1 Drain process 6 sec 12-16 sec when restarting or if an earlier program was interrupted
2 Inlet process 255 sec Maximum time. Inlet time is controlled by a flow meter**
3 Circ. pump 3 sec
4 Pause 30 sec If water temperature is >30°C ECO program starts (DW90.1)
5 Circ. pump 30 sec
6 Pause 5 sec
If ECO is
set
Circ.pump 120 sec
Drain process 120 sec Maximum time. Time is controlled by level sensor***
Inlet process 255 sec Maximum time. Inlet time is controlled by a flow meter**
7 Circ.pump 360 sec
8 Pause 5 sec
9 Circ.pump 150 sec If the level sensor indicates under IV the drain process will be
interrupted earlier.
10 Cleaning cycle for container 90 sec Maximum time 90 sec. Minimum time 76 sec*
11 Drain process 120 sec Maximum time. Time is controlled by level sensor***
Main wash
12 Inlet process 255 sec Maximum time. Inlet time is controlled by a flow meter**
13 Circ. pump + Combi dispenser 10 sec
14 Circ. pump + Element 60°C
15 Circ. pump 1560 sec
16 Cleaning cycle for container 90 sec Maximum time 90 sec. Minimum time 76 sec*
17 Drain process 120 sec Maximum time. Time is controlled by level sensor***
1:st rinse
18 Inlet process 255 sec Maximum time. Inlet time is controlled by a flow meter**
19 Cleaning cycle for container 90 sec
20 Drain process 120 sec Maximum time. Time is controlled by level sensor***
2:nd rinse
21 Inlet process 255 sec Maximum time. Inlet time is controlled by a flow meter**
22 Circ. pump 240 sec
23 Cleaning cycle for container 90 sec Maximum time 90 sec. Minimum time 76 sec*
24 Drain process 120 sec Maximum time. Time is controlled by level sensor***
3:rd rinse
25 Inlet process 255 sec Maximum time. Inlet time is controlled by a flow meter**
26 Circ. pump + Element 65°C
27 Circ. pump + Combi dispenser 10 sec Pulses (varies depending on the setting of rinse aid)
28 Circ. pump 300 sec
29 Pause 60 sec
30 Drain process 120 sec Maximum time. Time is controlled by level sensor***
Drying
31 Fan 480 sec
32 Signal 4 sec If signal is selected