Asko DW70 Service Manual

Service manual Dishwashers

Type: DW70

2

3

Contents

1. Introduction .................................................................................................................4

1.1 Models ................................................................................................................5

2. Technical data .............................................................................................................6

2.1 Technical information ........................................................................................6

3. Installation...................................................................................................................7

4. Component information .............................................................................................9

4.1 Components and measurement values ..........................................................9

4.2 Components and function description ........................................................11

5. Programs and control unit .......................................................................................14

5.1 Programs ..........................................................................................................14

5.2 Time display .....................................................................................................15

5.3 Programs and options ....................................................................................15

5.4 Wiring diagram and timer diagram ................................................................17

  5.5Programowdescription ...............................................................................18

5.6 Settings ............................................................................................................19

5.7 Service menu ...................................................................................................25

6. Troubleshooting ........................................................................................................28

 6.1Dishwashingresults .......................................................................................28

6.2 Most common faults ........................................................................................28

6.3 Water level ........................................................................................................29

6.4 Fault indications ..............................................................................................30

7. Tools ...........................................................................................................................32

7.1 Tools ..................................................................................................................32

7.2 Special tools ....................................................................................................32

4

INTRODUCTION

1. Introduction

You are holding ASKO’s service manual for the DW70 generation of dishwashers.

The DW70 dishwasher series is available in ve dierent 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 dierent machines. The dierent models are named
dierently in dierent markets. The type designation is most important when identifying a particu-

lar machine model.

The type plate can be found on the right of the inside of the door.

The rst two digits specify the year of manufacture

while the third and fourth digits specify the week of

manufacture.

It should be easy to service a dishwasher. It is important that you, as a service technician, are aorded
conditions that enable you to work in an ecient and satisfactory way. Our hope is that this service
manual will prove a useful tool in your daily work.

Asko Appliances/After Sales
Box 344
SE-532 24 Skara

Sweden

Type designation

Article number

Serial number

Year

Week

5

DW70.3

The DW70.3 is available in two versions – with three and ve options respectively. The machine has six
set programs and the controls are on the top..

DW70.4

The DW70.4 has a number of dierent options. The machine has 14 set programs. The controls are on
the top and the display (LCD) is on the top of the panel.

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.

The DW70.3 and DW70.4 models are used in both fully integrated and standard models. Other control
units are only used in standard models.

INTRODUCTION

DW70.5

The DW70.5 is available in two versions – with three and ve options respectively. The machine has
ve set programs and the controls and display are at the front.

DW70.C

DW70.C
The machine has six set programs and the control and the display are on the front of the panel.

SANI SANI

STA R TSTA R T

EN DEN D

S A N I W A S H

Pro g

StopStop

StartStart

6

2.1 Technical information

Height: 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)
Width: 596 mm (23-5/8”)
Depth: 570 mm (22-7/8”)
Weight: 42 kg / 45 kg with water softener
Water pressure: 0.03–0.2 MPa (0.3–2.0 kp/cm

2

), 18-176 psi
Connection: 1-phase, 230 V, 50 Hz, 10 A, (120V, 60 Hz, 15 A)**
Max. rated power: 1700 W, (1300 W)**

* According to EN 50242 standard.
** See type plate.

2. Technical data

TECHNICAL DATA

7

3. Installation

Suggested machine installations

The dishwasher can be installed built-in,
completely freestanding or partially free-

standing.

CAUTION!

Connections to electricity, water and drain
must be performed by qualied 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. Freestanding

A freestanding machine must be tted with an
anti-tilt device. This comprises two brackets,
which are screwed into place as illustrated in
gure 1. An alternative to the anti-tilt device
is a counterweight that is xed directly to the
back of the machine.
Push in the machine so that the rear feet slide
into the mounting brackets. Now the machine
will not tip over if a load is placed on the
door when open. If the machine is installed
completely freestanding, side panels and a
worktop should be tted. These accessories
can be purchased where you bought the

dishwasher.

C. Partially freestanding

If you install the machine so that either side is

visible, you can t a side panel.

D.Machineswithwoodendoor

Stronger door springs are available for pur­chase for machines with a tted wooden
door. Springs are available for various
weights and sizes of wooden door. Door
springs can be purchased where you bought

the dishwasher. Follow the instructions in

the installation manual for tting the wooden

door.

Figure 1. Anti-tilt brackets used for

freestanding installation

455-475

600

413

CAUTION!

A completely freestanding machine must be t­ted with an anti-tilt device/counterweight.

INSTALLATION

8

Connectiontowatersupply

The supply pipe must be tted 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 ush the pipe. Check that all connec-

tions are watertight.

Electrical connection

Machines tted with a cable and plug must be
connected to an earthed socket.

Technical data

See the type plate on the right-hand side of

the door.

CAUTION!

The power cable must be disconnected or the
power to the socket turned o when work is

carried out!

Drain connection

• The drain hose connects to a connection
nipple on the sink unit’s water trap (see illus­tration below). Note that the hose must be at-

tached at the same height as the underneath

of the sink unit otherwise dishwater from the
sink may run down into the dishwasher (see
illustration).

• The drain hose connects to a connection
pipe on the sink unit’s water trap. It must have
an internal diameter of at least 16 mm.

• The drain hose may be extended to a maxi-

mum of 3 m. Any connections and connect-

ing pipes must have an internal diameter of at
least 16 mm.

• No part of the drain hose may be more than
950 mm above oor level.

The hose must not be routed directly to the

oor drain or similar. In such cases, the hose can
act as a siphon and empty the machine.

The hose must always discharge at least 350
mm above oor level.

• Attach the hose holder.
(Min. 350 mm and max. 950 mm above oor

level.

Figure 3.

Hose holder

Max 950 mm

Min 350 mm

INSTALLATION

9

4.Component description

4.1 Components and measurement values

The specied 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 lter 680 kohm

8073780,81 EMC lter

1 Mohm

8079504

Heater 1600 W 230 V 32 ohm

8079505

Heater 1200 W 120 V 12 ohm

8078096 Thermistor

60 kohm

8073801,02

Combi disp. 230 V 1.6 kohm

8073803,04

Combi disp. 120 V 0.3 kohm

8078080

8078080

Circ. pump 220/240 V 50

Hz

Primary winding

115 ohm

Circ..pump 220-240 V 50

Hz

Auxiliary winding

260 ohm

8078082

8078082

Circ..pump 120 V 60 Hz 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/min

148 ohm

8078089

Drain pump 120V 60 Hz,

16 l/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/min

3.9 kohm

8079503 Inlet valve single 120 V,

4 l/min

0.95 kohm

8079500 Inlet valve fuse 220/240

V, 4 l/min

2 kohm

8079501 Inlet valve fuse 120 V, 4

l/min

0.5 kohm

8078090*

8078090 *

Softener salt water

valve 220/240 V

3 kohm

Softener mixer valve

220/240 V

2.33 kohm

10

COMPONENT INFORMATION

Flowmeter

The ow meter is tted in the air gap. The
ow meter is used to control the water intake
so that the right volume is taken in regard­less of the water pressure. It is even possible
to program the machine for time-controlled
water intake.
The ow meter comprises an impeller with two
magnets that is driven by the water ow. On the
outside, on the ow meter housing, is a sensor,
a reed switch, which closes each time the mag­nets pass. The number of pulses from the sensor
is proportional to the volume of the owing
water. A minimum water ow of 2 litres/minute
is required for the ow meter to operate. If

the necessary level is not reached within one

minute, the program stops.

Output signal: 220 pulses per litre.

Circulation pump

The circulation pump comprises an asynchro­nous motor, with a pump house capacitor.

4.2 Components and function description

Here we present the functions and specica­tions of the various electrical components.
Some components are only found in high-end
machines or in particular markets.

Inlet valve

Both single and safety inlet valves are used.

The valve contains a lter to stop particles then
a ow limiter to limit the ow to a maximum of
4 l/min. The valve opens when the water pres­sure exceeds 0.3 bar and provides full ow at

about 2 bar.

Safety valve

The safety valve has two independent valve
seats, each controlled by a separate elec-

tromagnet. 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.

Article no. Position Component Measurement

value

8078302*
8078302*

Softener salt water

valve 120 V

0.65 kohm

Softener mixer valve

120 V

0.65 kohm

8073830 Halogen bulb 5 W/12 V

<10 kohm

8052778 Vax motor

1.1 kohm

8073850 Fan motor 230 V

0,44 kohm

8073848 Fan motor 120 V

0.18 kohm

* The number is for a complete water softener; replacement salt and mixer valves are not
available separately.

11

COMPONENT INFORMATION

Spray arm diverter

Certain machines are tted with a spray arm
diverter. The spray arm diverter comprises a

synchronous motor that drives a disc valve

via a gearbox. The disc distributes dierent
amounts of water from the circulation pump
to the lower and upper spray arms at dierent
pressures. The motor/gearbox also drives a
cam with four dierent step times. A switch
detects the cam (step time) and provides
the control unit with feedback on its current
position when setting the desired spray arm

status.

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.

Machines that lack a spray arm diverter utilise
a water distributor instead, which routes the
water to both spray arms. The spray arms

always rotate at the same time.

Heater

The heater is of the ow-through type and is
tted between the bottom drain and the suc­tion side of the circulation pump. It comprises
a pipe with a heating coil. One side of the
heating coil is tted with an overheating cut­out with a trigger temperature of 98°C and an
automatic reset. The other side is tted with a
safety fuse that blows at 229°C.

Drain pump

The drain pump comprises a 30 W synchro­nous motor and a pump component. The
direction of rotation is random, making the
pump partially self-cleaning.

Fan

The fan extracts the damp air from the ma­chine during the drying phase of the program.

The fan system has a fan motor that drives

a double-sided fan wheel. Dry air is sucked
in from the opening on one side of the fan
wheel. The hot and damp air from the clean­ing compartment is drawn through the other
side of the fan wheel, when a Vax motor
opens a damper. This is done with a slight
delay. Dry and damp air are mixed in a con­duit that ends at the top of the door, where
the air is expelled through a nozzle.

Detergent and rinse aid dispenser

The detergent and rinse aid dispenser is
tted with an electromagnet which upon rst
activation dispenses detergent and upon
second activation dispenses rinse aid. The

system is reset when the dishwasher door is

opened.
The dispenser contains a chamber of adjust-

able volume to set the desired rinse aid dose.

The rinse aid level can be checked using the
optical indicator on the top of the dispenser.
Some models have a sensor, a reed switch,
tted to the dispenser. This measures the
rinse aid level, which is then indicated on the
panel.

Mainpowerswitch

The main power switch has 2 pins and breaks
the phase and the earth. However, power to
the lters, overow cut-out, drain pump and
inlet valve is not cut when the main power
switch is turned o.
On the DW-70.4 the main power switch is elec-

tronic and is integrated with the control unit.

It puts the machine into standby mode when

deactivated.

EMC protection

EMC protection ensures that the machine

does not interfere with nearby electrical

equipment. It also protects the machine from
external interference.

12

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 o when the door is closed.

Overowcut-out

The overow cut-out comprises a oat that
triggers a micro switch. This switches o the

inlet valve electrically and starts the drain

pump. The protection remains in place even if
the main power switch is turned o.

Light

The light is a 5 W/12 V halogen bulb powered
by a control unit via a micro switch. The lamp
turns on when the door is opened more than
5°. The lamp is dimmed when lit to reduce
the start current and to extend the life of the
bulb. 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 tted. The bulb can be
replaced from inside the cleaning compart-

ment.

Cables

The machine is tted with coded connectors
to prevent incorrect wiring. The cables com­ply with the Rast 2.5 and Rast 5 standards.

Water softener

The water softener softens the intake water
to prevent limescale deposits on dishes and
in the machine. The ion exchange resin is
recharged by opening the salt water valve
(found on the water softener) and releasing
water saturated with salt into the ion ex-

change chamber during the main wash. The

ion exchange chamber is rinsed clean at the

end of the main wash.

A mixer valve on the water softener controls
the water passing through or bypassing the ion
exchange resin. The higher the water softener
setting, the greater the amount of water pass-

ing through the ion exchange resin. When the
mixer valve is open, the water bypasses the ion
exchange resin.
Some models have a sensor, a reed switch,
to detect when the salt needs relling. Other
models use an optical indicator in the salt lling

hatch.

Air gap

On the side of the machine is an anti-back­ow device to prevent dirty water from being
siphoned back into the water system, such
as if a vacuum develops in the water system.
Machines with a water softener also have a
water pocket that is lled with about 2 dl of
water. This water pocket is emptied when the

salt water valve is activated.

Thermistor

The thermistor is at the front edge of the
bottom drain and detects when the selected

water temperature has been reached. If the

thermistor is short-circuited or detaches from

the circuit board, the heater is turned o.

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 wa-

ter level in the machine is too high (for ve
consecutive seconds) the drain pump starts
and all other components are switched o.
When the right level is reached, the program
continues where it left o. If the level sensor
generates an output signal of <1 VDC during
the prewash (indicating a blocked lter), an
additional prewash is activated with an SCS
step.

The level sensor also controls the draining time

(can be extended from 25 seconds to a maxi­mum of 3 minutes). Does not apply to DW-70.1

The sensor also checks the need to rell
(such as if a bowl lls with water). Does not
apply to DW-70.1

COMPONENT INFORMATION

13

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 dierent 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, prewashes, additional

rinses and so on.
The turbidity meter is located at the front edge
of the bottom drain.

Humidity sensor

The humidity sensor is located in the fan

house. The sensor is of the capacitive type

and measures relative humidity. The humid­ity sensor measures the ambient humidity

before the drying process begins. The drying
process continues until the humidity sensor

detects a level slightly above ambient humid-

ity (min. time 30 min. and max. time 70 min.).

COMPONENT INFORMATION

14

5. Programs and control unit

5.1 Program

Program

1st
pre-

wash

2nd pre­wash

1st
ush

Main

wash

Clean dr.
pump

2nd
Flush

1st

rinse

2nd
rinse

Clean
dr. pump

Final
rinse

Drying

time L
(min.)

Drying
time H

(min.)

Temp & drying options

L H L H L H L H L H L H L H L H L H L H M U M U

Daily wash

X X X X* X X X X X X X X X 20 30

Heavy wash

X X X X X X X X X X X X X X X X 48 30 48 30

Sani (duo wash EU/AU)

X X X X X X X X 48 30 30 30

Pots & Pans (duo wash
US)

X X X X X X X X X X X X X X X X 48 30 30 30

Normal wash

X** X X X* X X X X X X X X X 48 30 30 30

Mixed wash

X X X X X X X X 48 30 30 30

Upper half wash

X X X X X X X X 48 30 30 30

Lower half wash

X X X X X X X X 48 30 30 30

Time program 30-60 min.

X X X X X X X X X X

0-9

Time program 75-105

min.

X X X X X X X X X X X X

12-25

Time program 120-135

min.

X X X X X X X X X X X X X X

25-40

Time program 150-180

min.

X X X X X X X X X X X X X X X X

49-60

Glass/Delicate wash

X X X X X X X X

20 20 30 30

Quick wash

X X X X X X X X

0

Rinse & Dry

X X

20

Rinse & Hold

X X

0

The table below shows which dishwashing processes are activated in each program.

L

=

Low temperature

M =

With fan

H

=

High temperature

U =

Without fan

* (only with turbidity sensor)
** (only spray arm diverter)
*** (only duo machines)

A-F (program alternatives)

PROGRAMS AND CONTROL UNIT

* only US
** US/AU

Program Machine type

DW70.1 DW70.3 DW70.5 DW70.4

DW70.C

Auto wash*

A A X

Daily wash

A A X

Heavy wash

A B B X

Sani***

X

X (EU,AU)

Pots & Pans***

X

(US)

Normal wash

B C C X

X

Mixed wash**

X

Upper half wash**

X

Lower half wash**

X

Time program

D X

Glass/Delicate wash

D X

X

Quick wash

C E D X

X

Rinse & Dry

X

Rinse & Hold

D F E X

X

15

* (only Time program)

** (only spray arm diverter)

*** (For detergent with water softener)
1-5 (option alternatives)

5.2 Time display

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).

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). The new time is not stored if
any faults occur during the program or if the
program is interrupted.

5.3Programswithoptions

PROGRAMS AND CONTROL UNIT

Option Machine type

DW70.1 DW70.3 DW70.5 DW70.4

DW70.C

Temperature

1 1 1 X

X

Drying

2 2 2 X

X

Delayed start

3 3 X

X

Time saver

4 4 X

X

Super rinse

4 4 X

X

Tab***

4 4 X

X

Set Time.*

4 X

X

Basket lo­ading**

5 5 X

X

Cool touch

X

X

Program Option

Tem­pera­ture

Dry­ing

Delayed
start

Time
saver

Super

rinse

Tab Full

load

Upper

load

Lower

load

Cool touch

Auto wash

X* X X X X X

Daily wash

X X X X X X X X X

Time program

X X X X X

Heavy wash

X X X X X X X X X X

Sani

X X X X X X X X

Pots & Pans

X X X X X X X X X

Normal wash

X X X X X X X X X X

Mixed wash

X X X X X X X

Upper half

wash

X X X X X X X

Lower half

wash

X X X X X X X

Glass/Delicate

wash

X** X X X X X X X X

Quick wash

X X X X X X X X X

Rinse & Dry

X X X X

Rinse & Hold

X X X X X

* Humidity sensor
** (C-60°C)

16

5.4 Wiring diagram

FORMAT A3

This document must not be cop ied without

our written pemission, and the contents

thereof must not be imparted to a thi rd party

nor be used for any unauthorized purpose.

Contravention will be prosecuted.

Asko Cylinda AB

CIRCUIT DIAGRAM DW70.1, .3, .4, .5, .C

80 796 55 - b

DP

FN 1

F

DR

HE

CP

IV

VAX

MS

CD

RAS

DS

CP

DIV

SV

PS

1 2 3

TS

HS

IS

TH

M

FM

L

N

WIRES IN ALL MACHINES

INTERNAL CONNECTION

WIRES IN SOME MACHINES

HL

1/C

2

SL

HE

1

2

3

4

5 6

7

8

10

DP

RAS DS CD

FN VAX CP

IV SV MV

DIV

HL TS PS FM

TH

HS

HE

MS

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

CD:

CP:

DIV:

DP:

DR:

DS:

F:

FM:

FN 1:

FN 2:

FS:

HE:

HE (PTC):

HL:

HS:

IS:

IV:

I2C:

MS:

MV:

PS:

RAS:

SL:

SS:

SV:

TH:

TS:

UART:

VAX:

RESISTANCE

1 MOHM

12 OHM

32 OHM

25 OHM

25 KOHM

0.3 KOHM

1,6 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

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

8 9

SS TH

SS

TH

DW70.3

DW70.4

DW70.5

DW70.1, .C

SL

HE (PTC)

FN 2

MV

I2C

UART

PROGRAMS AND CONTROL UNIT

17

5.4 Timer diagram

PROGRAMS AND CONTROL UNIT

Q

uick wash

Com

p

onents

Step times

Program

Both (normal)

Upper basket wash

Lower basket wash

Mixed wash

Both (normal)

Upper basket wash

Lower basket wash

Mixed wash

Both (normal)

Upper basket wash

Lower basket wash

Mixed wash

low pressure 30 10 50 40 15 10 30 20 50 10 90 70

High pressure 30 10 50 40 45 10 70 60 10 10 10 10

low pressure 30 50 10 30 15 30 10 20 50 90 10 30

High pressure 30 50 10 10 45 70 10 20 10 10 10 10

Time in seconds for water divider action

Lower spray arm

Upper spray arm

Timer diagram DW-70 (Quick wash only)

T-30º/35º (Eco/normal)

2''

2''

25''

600'' (normal drying)

T-30º/35º (Eco/normal)

90''

60" paus

Outlet-time can

varies on machines

with pressure sensor

25''

7''

3'' (Not Eco drying)

40/45''

90"/60" (Eco/Normal drying)

Delicate wash

Explanation chart for water divider dishwasher DW-70

Inlet valve (mix valve)

Salt valve (Softener)

Fan and vax-actuator

6" or 25'' *

Drain pump

Circulation pump

Combi dispenser

Heater

22'' SCS

Quick wash

Auto, Normal,

Quick, Rinse

programs

Heavy wash

180''

Programs

Main-wash 1st.Rinse

Comments: Water

intake time may

varies with

flowsensor.

22'' SCS

25''

40/45''

T-0º/60º (Eco/normal drying)

3'' (Not Eco drying)

60'' (Not Eco drying)

Final rinse

6"

5" paus

80" cleaning softener ***

*** Inlet valve on 8"x 5, off 8" x5. Outlet pump on whole step

* If previous program been interrupted = 25"

** With or without diverther

120" (salt valve active 80")

40''/45'' **

30''

3''

18

5.5Programowdescription

Presented below is the Quick program. If the component test in the service menu is not sucient to
identify a fault you can run this program and compare the results with the ow description below. If they

are in agreement this indicates a correctly functioning control unit.

Component Time Comments

Mainwash

Drain pump 6 sec. 25 sec. if the previous program was cancelled

with the Start/Stop button
Inlet valve 40/45 sec. With/without diverter
Circ. pump 30 sec.
Circ. pump & Combi dispenser 3 sec.
Circ. pump 120 sec.
Circ. pump & Element T-30º/35º Eco/Normal temp
Circ. pump 180 sec.
Circ. pump & Element T-30º/60º Eco/Normal temp
SCS 22 sec. Super Clean System
Drain pump 25 sec.

1st rinse
Inlet valve 7 sec.

Circ. pump 2 sec.
Pause 5 sec.
Circ. pump 2 sec.
Drain pump 6 sec.
Inlet valve 40/45 sec. With/without diverter
Circ. pump 90 sec.
SCS 22 sec. Super Clean System
Drain pump 25 sec.

Final rinse

Inlet valve 40/45 sec. With/without diverter
Circ. pump & Element T-0/60º Eco/Normal drying
Circ. pump & Combi dispenser 3 sec. None Eco drying
Circ. pump 3 sec. No Eco drying
Circ. pump & Combi dispenser 60 sec. No Eco drying
Circ. pump 90/60 sec. Eco/Normal drying
Pause 60 sec.
Drain pump 25 sec.

Fan 600 sec. Normal drying

PROGRAMS AND CONTROL UNIT

19

Panel type DW70.1, L = LED, S = Push button

Variant settings

When the power is switched on for the rst time
after replacing the control unit, the variant settings
menu is displayed.

L1ashes: Variant 1 see above, with two options
(temp, dry).

L4ashes: Variant 2 see above, with one option
(temp).

1. Press the Program button (S1) until either L1
or L4 ashes.

2. Conrm your selection by pressing Start (S2).

(The program automatically returns to the

main menu.)

Toreturntothevariantsettingsmenu:

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. Press and hold the Program and Start buttons
(S1 & S2)

4. Switch o the main power switch (I/0)

5. Release the Program and Start buttons (S1 &
S2)

6. Press Start (S2) three times within 5 seconds.
Use the Program button (S1) to select the vari-

ant

7. Conrm your selection by pressing Start (S2).

The program returns to the main menu.

Water hardness setting

Activating the settings menu

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. Press and hold the Start button (S2)

4. Switch o the main power switch (I/0)

5. Release the Start button (S2); L7 starts ashing

6. Use the Program button (S1) to select the de-

sired water hardness

Setting:Waterhardness   
[°dH] (Germanwaterhardnessscale)

All LEDs unlit 0-5
(also applies to machines without water softener)
L1 lit 6-8
L1-2 lit 9-14
L1-3 lit 15-19
L1-4 lit 20-29
L1-5 + L11 lit 30-44
L1-6 + L11 + L12 lit 45+

Conrm your selection by pressing Start (S2). The
program returns to the main menu.

Total reset

To reset the machine to its factory settings.

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds.

3. Press and hold the Program button (S1)

4. Switch o the main power switch (I/0)

5. Release the Program button (S1).

L1 and L4 ash during the reset process. The
machine will reset various settings, although not
water hardness, and then automatically return to
the main menu. Detects the presence of a pres-

sure sensor.

PROGRAMS AND CONTROL UNIT

PROGRAM

L6

L1

L2

L3

L4

L5

L11

L12

L7

START

STOP

S1

S3

S2

S4

L8

L9

L10

PROGRAM

L6

L1

L2

L3

L4

L5

L11

L12

L7

START

STOP

S1

S2

L8

L9

L10

S4

Variant 1 Variant 2

5.6 Settings

DW70.1

20

DW70.3

Panel type DW70.3, L = LED, S = Push button,

Variant settings

When the power is switched on for the rst 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ashes:

Variant1 = Time saver

 L2ashes:

Variant2 = Super rinse option

 L3ashes:

Variant3 = Tab

2. Conrm your selection by pressing Start (S2).
The machine detects the presence of a turbid­ity sensor, a pressure sensor and a spray arm di-

verter. The program returns to the main menu.

To return to the variant settings menu:

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. 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). Proceed to step 6 within ve sec-

onds.

6. Press Start (S2) three times in quick succession.
L1, L2 or L3 ashes according to the previously

selected variant setting

7. Use the Program button (S1) to select a variant

8. Conrm your selection by pressing Start (S2).
The program returns to the main menu.

Water hardness setting

1. Turn o the machine using the main power switch.

2. Press and hold START/STOP and Drying selector at

the same time as you press the main power switch

once. You have now activated the Softener setting
menu.

3. Use the Program button PROG to adjust the

water hardness.

4. Press START/STOP to save the setting and exit the

menu.

Setting Water

hardness[°dH]

L1-L6, o 0-5 (incl. machines

without

extinguished water
softener)

L1 lit 6-8

L1-2 lit 9-14

L1-3 lit 15-19

L1-4 lit 20-29

L1-5 lit 30-44

L1-6 lit

45+

ActivatingofSuperrinse(Variant1and3;S7)

Activating the settings menu:

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. Press and hold the button (S7)

4. Switch on the main power switch (I/0)

5. Release the button (S7)

6. Use the Program button (S1) to select the

desired status

L1 unlit: Super rinse deactivated
L1 lit: Super rinse activated

7. Conrm your selection by pressing Start (S2).
The program returns to the main menu.

S1

L1 L2

L3 L4

L5

L6

S3

S4

S5

S6 S7

S2

L7

L8

L12

L13

L14

L16L15

L17

L10

L11

IR

PROGRAMS AND CONTROL UNIT

START

STOP

+

+

21

Child safety catch

Activating the settings menu:

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. Press and hold the temperature and drying op­tion buttons (S4 and S6)

4. Switch on the main power switch (I/0)

5. Release the temperature and drying option
buttons (S4 and S6)

6. Use the Program button (S1) to select the sta-

tus

L1 unlit: Child safety catch deactivated
L1 lit: Child safety catch activated

Conrm your selection by pressing Start (S2). The
program returns to the main menu.

Temporary deactivation of the Child safety catch is
achieved by pressing the temperature (S4) and dry­ing (S6) option buttons together.

Total reset

To reset the machine to its factory settings.

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. Press and hold the Program button (S1)

4. Switch on the main power switch (I/0)

5. Release the Program button (S1).

The machine will reset various settings, although not
water hardness, variant setting and intake volume.
The machine detects the presence of a turbidity
sensor, a pressure sensor and a spray arm diverter.

The machine then automatically returns to the main
menu.

PROGRAMS AND CONTROL UNIT

22

DW70.4

Panel type DW70.4, L = LED, S = Push button

Special settings

Turn on the main power switch, press the Menu but-

ton (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 hard-

ness setting.

This menu can also be used to view information

about how many cycles the machine has com-

pleted and total water consumption.

Water hardness setting:
Setting: Water hardness

[°dH]

The display shows: 0 0-5
(also applies to machines without water softener)

The display shows: 16-8
The display shows: 29-11
The display shows: 312-14
The display shows: 415-19
The display shows: 520-24
The display shows: 625-29
The display shows: 730-39
The display shows: 840-49
The display shows: 950+

Press S3 until the desired setting is shown.
Conrm with S4. The program stores

the settings and returns to the main menu.

Storeprogram(inshops,attradeshows
etc.)

Start by pressing and holding S4 with the main
power switch (S5) turned on.

Scrolling text is displayed:

“Turbo Drying ...Super Cleaning System...Auto

Wash...Flexi Racks...Power Zone...8 Steel......Turbo

Drying...”

Quit by pressing the main power switch.

Total reset

After replacing the control unit, the machine will
automatically perform a total reset, which will
detect the presence of the machine’s sensors and
spray arm diverter.

To return to total reset:

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. Press and hold the Program and Menu buttons
(S1 and S4)

4. Switch on the main power switch (I/0)

5. Release the Program and Menu buttons (S1
and S4).

The machine will reset various settings, although not
water hardness, language, variant and intake vol­ume. The machine detects the presence of a turbid­ity sensor, a pressure sensor, a humidity sensor and a
spray arm diverter. The machine then automatically

returns to the main menu.

Quick language setting

1.Turn o the main power switch (S5)

2. Wait 5 sec.

3. Press and hold S3

4. Switch on the main power switch (S5)

5. Release S3

6. Use the Program button (S1) to browse to the

desired language

7. Conrm your selection by pressing S2 or S4.

PROGRAMS AND CONTROL UNIT

23

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
rst time after replacing the control unit, the variant
settings menu is displayed.

1. Press the Program button (S1) until the

desired variant is selected:

The display shows the number 1 and L1
ashes:
Variant 1 = Time saver
The display shows the number 2 and L2
ashes:
Variant 2 = with Super rinse
The display shows the number 3 and L3
ashes:

Variant 3 = with Tab
The display shows the number 4 and L4 ashes:
Variant 4 = with Time program

2. Conrm your selection by pressing Start

(S2). The machine detects the presence of

a turbidity sensor, a pressure sensor and a

spray arm diverter. The program returns to

the main menu.

To return to the variant settings menu:

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. Press and hold the Program and Start but-

tons (S1 and S2)

4. Switch on the main power switch (I/0)

5. Release the Program and Start buttons (S1

and S2). It takes a few seconds for the ma-

chine to detect that S1 and S2 are pressed.

Proceed to step 6 within ve seconds

6. Press Start (S2) three times in quick suc-

cession. L1, L2, L3 or L4 ashes on the

display depending on the previous setting.

7. Use the Program button (S1) to select a vari-

ant

8. Conrm with the Start button (S2). The

program automatically returns to the main

menu.

Water hardness setting

Activating the settings menu:

1. Turn o the machine using the main power switch.

2. Press and hold START/STOP and Drying selector at the

same time as you press the main power switch once. You

have now activated the Softener setting menu.

3. Use the Program button to adjust the water hardness.

4. Press START/STOP to save the setting and exit the

menu.

Total reset

To reset the machine to its factory settings.

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. Press and hold the Program button (S1)

4. Switch on the main power switch (I/0)

5. Release the Program button (S1).

The machine will reset various settings, although
not water hardness, language, variant and intake
volume. The machine detects the presence of a
turbidity sensor, a pressure sensor, a humidity
sensor and a spray arm diverter. The machine

then automatically returns to the main menu.

PROGRAMS AND CONTROL UNIT

START

STOP

+

+

PROG

START

STOP

Setting Water hardness [°dH]

Display shows 0 0-5 (incl. machines without

water softener)

Display shows: 1 6-8

Display shows: 2 9-11

Display shows: 3 12-14

Display shows: 4 15-19

Display shows: 5 20-24

Display shows: 6 25-29

Display shows: 7 30-39

Display shows: 8 40-49

Display shows: 9 50+

24

DW70.C

Water hardness setting

Activate settings menu. :

1. Turn o 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. Use the Program button (S1) to select the

desired status

Setting:Waterhardness[°dH]

(Germanwaterhardnessscale)

Display: 0 0-5 (also applies to machines without
water softener)

Display shows: 1 6-8

Display shows: 2 9-11

Display shows: 3 12-14

Display shows: 4 15-19

Display shows: 5 20-24

Display shows: 6 25-29

Display shows: 7 30-39

Display shows: 8 40-49

Display shows: 9 50+

Conrm your selection by pressing Start (S2). The
program returns to the main menu.

Panel type DW70.3, L = LED, S = Push button,

Total reset

To reset the machine to its factory settings.

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds.

3. Press and hold the Program button (S1)

4. Switch o the main power switch (I/0)

5. Release the Program button (S1).

The machine will reset various settings, although
not water hardness, water inlet volume and feel
presence of turbidity, pressure sensor and
Spray arm diverter and then automatically return
to the main menu. Detects the presence of a pres-

sure sensor.

25

5.7. Service menu

Activating the service menu
DW70.1

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. Press and hold the Program and Start but­tons (S1 & S2)

4. Switch on the main power switch (I/0)

5. Release the Program and Start buttons (S1
& S2)

L7 ashes

Press S1 to activate the component test. These
are activated in order after each button press:

1. Inlet valve and mixer valve (mixer valve open

1 second then inlet valve open, after next
press of S1 both valves closed 1 second
then only inlet valve open)

2. Salt water valve (salt and mixer valve only in
machines with water softener)

3. Combi dispenser

4. Circulation pump

5. Circ. pump and element (max. 75°C)

6. Fan and Vax motor

7. Drain pump

Adjustwaterintake(doneinservicemenu)

Press and hold the Program button (S1) for three
seconds. The water intake can now be adjusted

as described below

L1 unlit: Volume-controlled water intake (control­led by ow meter)
L1 lit: Time-controlled water intake

Conrm your selection by pressing Start (S2). The
program returns to the main menu.

DW70.3

1. Turn o the main power switch (I/0)

2. Wait at least 5 seconds

3. 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)

L10 and L11 ash.

Most recent fault indicated by L1-L6.

Press S1 to activate the component test. These
are activated in order after each button press:

1. Inlet valve and mixer valve (mixer valve
open 1 second then inlet valve open, after
next press of S1 both valves closed 1 sec­ond then only inlet valve open). L1 and L2 lit

2. Salt water valve (salt and mixer valve only in
machines with water softener). L3 lit

3. Combi dispenser. L4 lit

4. Circulation pump. L5 lit

5. Circ. pump and element (max. 75°C). L6 lit

6. Fan and Vax motor. L1 and L2 lit

7. Drain pump. L1, L2 and L3 lit

Adjustwaterintake(doneinservicemenu)

Press and hold the Program button (S1) for three
seconds. The water intake can now be adjusted as

described below

Press the Program button to step through:
L1-L6 unlit: Normal water intake volume
L1 lit: Water intake volume increases by 5 %
L2 lit: Water intake volume increases by 10 %
L3 lit: Time-controlled water intake
L4 lit: Water intake volume increases by 5% time-

controlled

L5 lit: Water intake volume increases by 10% time-

controlled

L6 lit: Water intake volume increases by 15% time-

controlled

Conrm your selection by pressing Start (S2). The
program returns to the main menu.

PROGRAMS AND CONTROL UNIT

26

Display +15 %: Water intake volume increases by 15 %
Display Time: Time-controlled water intake
Display +5 %: Water intake volume increases by 5%
Display +10%: Water intake volume increases by 10%
Display +15 %: Water intake volume increases by 15%

Adjust LCD contrast (browse with S3)

LCD contrast = 0, +1, +2, -1.

Press Start (S2) to store the water intake volume and
LCD contrast settings.
The program returns to the main menu.

DW70.4

1. Turn o the main power switch (S5)

2. Wait at least 5 seconds

3. Press and hold the Program and Start but­tons (S1 and S2)

4. Switch on the main power switch (S5)

5. Release the Program and Start buttons (S1
& S2)

The service menu has four submenus:

1. Machine and fault information

2. Component diagnostics

3. Adjust water intake

4. Adjust LCD contrast
Press (S4) to browse between these menus
Press (S3) to enter the selected submenu

and (S4) to return

Machineandfaultinformationdisplays:

(browse with S3)

1. Date code (year/week) of control unit

2. Software version

3. Most recent fault

4. Second most recent fault (other than most
recent)

5. Third most recent fault (other than two most
recent)

Activatingcomponentdiagnostics:(browse

withS3)

1. Inlet valve and mixer valve (mixer valve
open 1 second then inlet valve open, after
next press both valves closed 1 second then
only inlet valve open (display shows water

vulume pulses from the ow sensor which is
situated in the lower part of the air break.

2. Salt water valve (salt and mixer valve only in
machines with water softener)

3. Detergent and rinse aid dispenser

4. Circulation pump (display shows turbidity
(dirt sensor) according to chart)

5. Heater and circulation pump (max. 75 °C)
(display shows temperature, see Table)

6. Fan (display shows humidity sensor reading)

7. Drain pump (display shows pressure sensor
reading: according to chart)

Adjustwaterintake(browsewithS3)

Display 0: Normal water intake volume
Display +5 %: Water intake volume increases by
5 %
Display +10%: Water intake volume increases by
10%

The table shows the voltage and corresponding
display code DW70.4

PROGRAMS AND CONTROL UNIT

VDC Display

0 0

0.2 10

0.4 20

0.6 31

0.8 41

1.0 51

1.2 61

1.4 71

1.6 82

1.8 92

2.0 102

2.2 112

2.4 122

2.6 133

2.8 143

3.0 153

3.2 163

3.4 173

3.6 184

3.8 194

4.0 204

4.2 214

4.4 224

4.6 235

4.8 245

5.0 255

27

DW70.5

1. Turn o the main power switch (I/0).

2. Wait at least 5 seconds.

3. 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. Inlet valve and mixer valve (mixer valve open 1
second) then inlet valve open.

2. Only inlet valve open.

3. Salt water valve (salt and mixer valve only in
machines with water softener)

4. Combi dispenser

5. Circulation pump

6. Circ. pump and element (max. 75°C)

7. Fan and Vax motor

8. Drain pump

Adjustwaterintake(inservicemenu)

Press the Program button (S1) for 3 seconds to
activate the menu for setting the water intake.
Then use the Program button (S1) to step

through.

The display shows:
P:0 = Normal water intake volume
P:5 = Water intake volume increases by 5%
P:10 = Water intake volume increases by 10%
P:15 = Water intake volume increases by 15%
T:0 = Normal water intake volume
T:5 = Water intake volume increases by 5%
T:10 =Water intake volume increases by 10%
T:15 =Water intake volume increases by 15%

P = water intake controlled by ow meter
T = water intake time-controlled

Conrm selection by pressing Start (S2). The
program returns to the main menu.

PROGRAMS AND CONTROL UNIT

DW70.C

1. Turn o the main power switch (I/0).

2. Wait at least 5 seconds.

3. 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) .
The display lights up in ve seconds.

Fault indications

Latest occurd fault indicates F1. F2 and so on, on
the display

Component test

Press S1 to activate the component test and step
through the following components:

1. Inlet valve

2. Salt water valve (only in machines with water
softener)

3. Detergent and rinse aid dispenser

4. Cirkulation pump

5. Heater and cirkulation pump
(Max 85°C)

6. Fläkt

7. Avloppspump

Adjustwaterintake

Hold the program button until ”1” in the display
extinguished. Now, the water intake is adjustable

according to below:

Press the program button and step trough:
The displays shows:

0: Normal water intake volume

1: Water intake volume increases by 5%

2: Water intake volume increases by 10%
3: Water intake volume increases by 15%
4: Time-controlled water intake

5: Time-controlled water intake increases by 5 %

6: Time-controlled water intake increases by 10 %
7: Time-controlled water intake increases by 15%

Conrm selection by pressing Start (S2).
The program returns to the main menu.

28

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 pro-

gram.

• Check that the customer is using a suitable

dishwashing detergent, preferably one with
proven good results.

• Detergent is a perishable product. Check

that the detergent is not too old and that the
customer is using the right amount. Most

importantly not too much detergent.

• For machines with a water softener, dose as

for soft water.

• Check that the customer is loading the ma-

chine correctly.

• Check that no dishes are preventing the

spray arms from rotating and that the holes

are not clogged.

• Check that the machine has the right water

level (see page 29).

• Check that the gauge block on the left side

of the bottom drain by the drain pump is in
place.

• Check that the machine heats to the right

temperature.

Filmormarksondishesafterwashing

• Is the water softener cover properly

tightened?

• Is the rinse aid dispenser correctly

adjusted?

• Is the water softener correctly adjusted?

• Is there any salt in the salt compartment?

• Is the right type of salt being used?

6.2 Common faults

If the dishwasher does not work, you
should rst check whether this is due to a
simple fault, something that the customer
can rectify. Use the following questions to

troubleshoot the machine.

Themachinewillnotstart

• Has a fuse blown?

• Is the machine powered?

• Is the door properly closed?

• Is the water supply turned on?

If the answer to any of the above questions is
“YES” and the machine seems to lack power,
rst check that there is power at the main
power switch and the control unit. Replace
any faulty components.

Water remaining in the machine

• Is the drain hose blocked? Check the con­nection to the household drain.

• Is the drain hose bent?

• Are the lters blocked?

• Is the drain pump blocked?

• Is the gauge block on the left side of the
bottom drain by the drain pump incor­rectly tted?

If the fault cannot be found with the help of this
chapter, open the service menu and perform an
function test on all components.

29

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.

In the event of too low a water level, the lter
in the inlet valve must always be checked and

rinsed clean of any dirt. The inlet hose with a

¾" connection at both ends has a lter in the

connector outside the machine that must also

be checked and rinsed clean of any dirt.

Figure: Check the level against the lower spray

arm hub

Overow level = 4.7 litres

Without spray arm diverter = 3.2

litres

(1.5 mm above the level)

With spray arm diverter = 2.8 litres
(0.5 mm below the level)

TROUBLESHOOTING

30

L - LED, S – Push button, F – Fault code or plain text on display, D - Display

6.4 Fault indication

DW70.5

DW70.1

DW70.4

PROGRAM

L6

L1

L2

L3

L4

L5

L11

L12

L7

START

STOP

S1

S3

S2

S4

L8

L9

L10

PROGRAM

L6

L1

L2

L3

L4

L5

L11

L12

L7

START

STOP

S1

S2

L8

L9

L10

S4

DW70.3

The door is open

70.1 Lit program progress lamps ash

70.3 L10 ashes

70.4 “Close door”

70.5 The display shows

70.C L10 ashes

TROUBLESHOOTING

Cleanlter:(onlyDW70.4)

“Clean lter”

Shown automatically after every 300 cycles and is
not a fault indication. This message is a reminder

to the user to check the lters and clean them if
necessary. The message disappears the next
time a button is pressed.

S1

L1

L2

L3 L4

L5 L6

S3

S4 S5

S6

S7

S2

L7

L8

L12

L13

L14

L16

L15 L17

L10

L11

IR

DW70.C

31

6.4 Fault codes

NB:Some DW70.3 and DW70.4 models

may have a status lamp that always ashes

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 ashes

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 proc-

ess. Only indicated in service menu.

Check:Element, thermistor, water level,
circulation pump, control unit and cables.

Overlling

70.1 L2 ashes

70.3 L2 ashes

70.4 “Overlling”

70.5 Fault code “F2”

70.C Fault code “F2”
Too much water in the machine (pressure
sensor) or oat activated. If the water has not
been emptied within 60 seconds, the pro­gram stops (drain pump activated).
Check: Drain pump (blocked hose), ow
meter, inlet valve, leaks and cables.

Thermistorfault(DW70.1noindication)

70.3 L3 ashes

70.4 “Thermistor fault”

70.5 Fault code “F3”

70.C Fault code ”F3
Stopped or >80 °C. Program continues with
the process. Only indicated in service menu.

Check:Thermistor and control unit.

Waterintakefault(DW70.1noindication)

70.3 L4 ashes

70.4 “Water inlet fault”

70.5 Fault code “F4”

70.C Fault code ”F4”

< 80 pulses within 60 seconds or correct
number of pulses not achieved within 255
seconds. Program stops.
Check:Water inlet, ow meter, inlet valve

and cables.

Leaking valve

70.1 L5 ashes

70.3 L5 ashes

70.4 “Leaking valve”

70.5 Fault code “F5”

70.C Fault code”F5”
Water intake detected when inlet valve deac­tivated. Any current program stopped (drain
pump activated).
Check: Leak through inlet valve and ow

meter.

Pressure sensor fault (DW70.1 no

indication)

70.3 L6 ashes

70.4 “Pressure sensor fault”

70.5 Fault code “F6”

70.C Fault code”F6”
Output signal > 4.8 V. The program contin-

ues. Only indicated in service menu.

Check: Pressure sensor, control unit and

cables.

Drainfault(DW70.1noindication)

70.3 L1 and L2 ash

70.4 “Drain error”

70.5 Fault code “F7”

70.C Fault code ”F7”
Water not drained after 120 seconds drain­ing. Program stops.
Check: Drain pump, hoses, drain hose t­tings, control unit and cables. Also check
whether lter is blocked.

TROUBLESHOOTING

32

TOOLS

Turbidity sensor fault (DW70.1 no

indication)

70.3 L1 and L5 ash

70.4 “Turbidity sensor fault”

70.5 Fault code “FA”

70.C Fault code “FA”

Only indicated in service menu. The machine as-

sumes high turbidity in case of “uncertainty” in the
auto program.

Check:Water quality, lters, turbidity sensor

and drain system.

Spray arm diverter fault (DW70.1 no

indication)

70.3 L1 and L6 ash

70.4 “Diverter fault”

70.5 Fault code “FB”

70.C Fault code “FB”
Position switch always closed or open. The
program continues. Only indicated in service

menu.

Check: Spray arm diverter (functioning gear­box, switches and cables).

Humiditysensorfault(onlyDW70.4)

“Humidity sensor fault” (only in service menu)
Check:Humidity sensor, cables, fan, damper
and Vax motor.

7.1 Tools

The following tools are needed to service the
DW70 dishwasher:

Torx

T25

T20

T10

Ring spanner

10 mm
17 mm

Socketscrewdriver

10 mm

7.2 Special tools

8801339 Universal tool, dishwasher
7281370 Hose clamp pliers, Oetiker

33

Article no. 80 836 38 rev. 02