Electrolux WSF67251S User manual

Copyright 2015 ELECTROLUX HOME PRODUCTS PTY LTD Technical Services
MODEL: WSF67251S
PNC: 942001295 00
MODEL: WSF67381S
PNC: 942001293 00
MODEL: WSU67381S
PNC: 942001294 00
WESTINGHOUSE
SERVICE MANUAL
DOMESTIC HOUSEHOLD
DISHWASHERS
ELECTROLUX HOME PRODUCTS PTY LTD
ABN 51 004 762 341
Technical Publication Nº DWSI1008 Issue: 2
Date: 06/18
CONTENTS PAGE
SERVICE TEST, DIAGNOSTIC ACCESS & TEST 2
SERVICE FAULT CODES 3
INDIVIDUAL COMPONENTS AND RESISTANCE VALUES 4
NOTES PAGE 5
WIRING DIAGRAM & PCB CONNECTIONS 6-7
ELECTRICAL COMPONENTS, TERMS AND ABBREVIATIONS 8
ELECTRICAL COMPONENT SPECIFICATIONS 17
PLASTIC COMPONENTS 21
DISASSEMBLY 24
ACCESSING INNER COMPONENTS 31
ACCESSING COMPONENTS FROM THE FRONT OF THE MACHINE 39
ACCESSING COMPONENTS THROUGH THE BASE 40

Page 2
SERVICE TEST
WSF67251S, WSF67381S & WSU67381S
NOTE: Only the Service Technician can execute this procedure.
Accessing Service Test:
Press and hold the Start/Pause button with the Dishwasher turned OFF.
Power the machine ON while continuing to hold Start/Pause button in for at least six
seconds (6)
The Service Test starts automatically displaying “SP 01”.
Release the Start/Pause button.
All LED’s blink for approximately 2 seconds (LED test).
If a failure code has occurred, it is stored within the PCB’s memory and displayed in the
first 6 seconds of the Service test. Up to 3 codes are stored in memory. Failure codes would
have a prefix number of 1, 2, and 3 with 1 being the latest code and so on.
If an error occurs during the Service Test, the error code displays at its completion.
* During the Service Test an unsuccessful heating failure test (F8) works with reduced time to
diagnose (first measurement at 2min20sec and the second measurement at 4min20sec)
NOTE:
a. If you open the door during a Service Test, the Start/Pause led blinks and “SP” displays
on the LED panel.
b. If you press the Start/Pause button during a Service Test, the first wash program starts.
Step Displayed Time Tested Load
0 Last 3 Fault Codes6 sec Up to 3 codes are displayed during
this time
SP01 Drain 6 sec Drain pump.
SP02 Fill ~1 min Flow meter; Inlet Valve;
SP03 Fill+ Wash Flow meter; Inlet Valve; Pressure Switch;
SP04 Turbidity Sensor* 30 sec Measurement sensor of water turbidity
(*if fitted)
SP05 Wash 1 min
Circulation pump; Regeneration Valve;
Detergent Dispenser.
SP06 Wash+ Heat* 5 min Heater (PSW); NTC; Diverter (position).
SP0 7 / SP0 8 Regeneration Valve* /
Turbo Fan 1 min *Regeneration Valve (N/A) + Turbo Fan (Turbo Fan only WSF & WSU67381S)
9 Drain 20 sec Drain pump; Pressure Switch.
10 End - Code Error or End LED

Page 3
SERVICE FAULT CODES
TYPE OF
ALARM
DISPLAY
DISPLAYED
TO THE
USER
DESCRIPTION OF THE
ALARM
CONDITON MACHINE
STATUS POSSIBLE CAUSE
F0 NO During
5”;
Floater sensing switch
ON 1) Washing program
restarts 1) Water leakage from body
F1 YES More than
5”;
Floater sensing switch
ON
1) Stop all
devices
2) Stop Program
flow
3) Drain empty +
30"
4) Visualize the failure
code
1) Water leakage from
body
2) Floater sensing switch can
be
broken
F2 YES
During 180”;
Drain pump ON +
Circulation pump ON +
Pressure sensing switch
ON (full level
position)
1) Stop all
devices
2) Stop Program
flow
3) Drain empty +
30"
4) Visualize the failure
code
1) Pressure switch is
activated
continuously
2) Drain pipe is
blocked
3) Drain pump is
broken
F3 YES When the triac valve is
OFF and flow meter
gives some impulses
(more than
500cl)
1) Drain all
water
2) Water inlet valve works
12secOFF/12sec ON (try to load
again correct amount of water inside
the machine)
if failure
persists;
3) Drain all
water
4) Water inlet valve works
12secOFF/12sec ON (try to load
again correct amount of water inside
the machine)
if failure
persists;
5) Visualize the failure
code
1) Water inlet valve is
broken
2) Electronic card is
broken
F4 NO flow meter does not give
any
impulses
During filling water
step;
1) Water inlet valve works 50
seconds
2) Water inlet valve and circulation
pump work 60
seconds
3) Program works and finishes without
showing failure
code
1) Flow meter is
broken
2) Flow meter cable could be
off
3) Electronic card is broken
F5 YES After start circulation
pump; Pressure sensing
switch
OFF
1) Water inlet valve and circulation
pump work 100
seconds
if failure
persists;
2) Stop all
devices
3) Stop Program
flow
4) Drain empty +
30"
5) Visualize the failure
code
1) Tap could be
closed
2) Circulation pump can be
broken
3) Pressure switch can be
broken
4) Floater switch can be
broken
F6 YES 1) NTC value is open circuit
(0)
2) NTC value is short circuit
(1)
1) Stop all
devices
2) Stop Program
flow
3) Drain empty +
30"
4) Visualize the failure
code
1) NTC is
broken
2) Electronic card can be
broken
F7 YES When electronic card detects
Water temperature >=
77°C
1) Stop all
devices
2) Stop Program
flow
3) Drain empty +
30"
4) Visualize the failure
code
1) NTC is
broken
2) Electronic card can be
broken
F8 YES
During the heating phases,
after the first 420”, if water
temperature increases less
than 2°C or if it
is less than
0°. The first valid value to
check is read after 120” from
the beginning of the heating
step.
1) Program works and
finishes
2) At the end of the program,
3) Visualized the failure
code
1) NTC is
broken
2) Electronic card can be
broken
3) Heater can be broken
F9 YES During 30"; Diverter does not
give any
impulses
1) Stop all
devices
2) Stop Program
flow
3) Drain empty +
30"
4) Visualize the failure
code
1) Diverter is
broken
2) Diverter cable could be
off
3) Diverter connector is
assembled
opposite
FE YES While the program is
running When software
parameter Check sum is
uncorrected
1) Stop all
devices
2) Stop Program
flow
3) Drain empty +
30"
4) Visualize the failure
code
1) Main supply voltage of
the location can be surged
or
burst
FA NO Turbidity does not give any
impulses (only auto
programs)
Program works and finishes without
showing failure
code 1) Turbidity is
broken
2) Turbidity cable could be
off

Page 4
INDIVIDUAL COMPONENTS AND THEIR RESISTANCE VALUES
You can measure the components either on the PCB connectors or directly from the
component. Measuring from the connectors of the PCB gives definitive results to define the
repair suited. Using the Component Resistance Values from the table below, you can
determine the failed component.
LEGEND: KN = Connector, (e.g. KN2.1 = Connector 2, Position 1)
COMPONENTS REAL VALUES NOTES
ON/OFF Button 0 on component - On/Off Button Is Pressed
Door Switch KN2.9 – KN2.2 0 - Door Is Closed
Pressure Switch KN2.10 – KN2.2 0 
  - There is Water in Sump - There is no Water in Sump
Drain Pump KN2.2 – KN2.4 143 ± 10 (Hanyu)
210 ± 12.6 (Hanning)
Water Inlet Valve KN2.6 – KN 2.9 3750 ± 375 (20ºC )
Diverter KN6.1– KN 2.9 6840 ± 342 
Turbo Fan Motor KN6.2– KN 2.9 238.6 ± 11.9 
Heater 23.95 ± 15 - Measured Just on the
Component
Detergent Dispenser 4450 ± 10 (25 ºC) - Measured Just on the
Component
Recirculation Wash
Pump KN2.3 – KN2.9 95 ± 6.65 
126 ± 8.8 
- Primary Winding
(on PCB Connector)
- Secondary Winding
(Just on the Component)
NTC Sensor
( Relative to water
temperature ºC )
KN 7.3-KN 7.4 25°C – 5000 ± 250 
35°C – 3300 ± 181.5 
55°C – 1520 ± 98.8 
63°C – 1174 ± 88.0 
80°C – 670 ± 53.5 
90°C – 488 ± 41.5 
Float Switch KN2.1 – KN 2.5 0 
KN2.1 – KN 2.4 
- Micro Switch Is Inactive
(No Water Present)
- Micro Switch Is Active
(There is Water Present)

Page 5
NOTE PAGE

Page 6
WIRING DIAGRAM

Page 7
PCB CONNECTIONS

Page 8
1.ELECTRICAL COMPONENTS, TERMS AND ABBREVIATIONS
1.1 Wash Pump
95 ± 6.65 from the Main P.C.B. Connector KN2.3 – KN2 (Primary Winding)
126 ± 8.8 from the component (Secondary Winding)
1.2 Drain Pump:
143 ± 10 from the Main P.C.B. Connectors KN2.2 – KN2.4 (Hanyu)
210 ± 12.6 (Hanning)
The above sketch shows the connectors of the drain pump and on the electronic card. Apply
the probes of the tester onto the relative connectors as shown.
From the component:
Apply the probes of the tester onto the relative connectors as shown.
ABBREVIATION COMPONENT
FM FLOWMETER
SET NTC SENSÖR
I
V
INLET VALVE
FS FLO
A
TSWITCH
DP DRAIN PUMP
PS PRESSURE SWITCH
DS DOOR SWITCH
DE DISPENSER
HE HEATER
CP WASH MOTOR
C CAPACITOR
RV REGENERATION VALVE
SF THERMAL OVERLOAD

Page 9
Values of Alternative Pump Coils
1.3 Heater Casing
Can’t be measured from the Main P.C.B. Connectors:
From the component
23.95±15
Apply the probes of the tester onto the relative connectors as shown.

Page 10
1.4 Detergent Dispenser
Can’t be measured from the Main P.C.B. Connectors:
From the component
1660± 10(25 C º)
1.5 Pressure Switch
From the Main P.C.B. Connector
KN2.10 – KN2.2 0there is water (Full)  there is not water (Empty)
The above sketch shows the connectors of the pressure switch on the Main P.C.B. Apply the
probes of the tester onto the relative connectors as shown.
From the component
Apply the probes of the tester onto the relative connectors as shown.

Page 11
1.6 NTC Sensor
From the Main P.C.B. Connector:
(Relative to water temperature ºC)
KN 7.3-KN 7.4 25°C – 5000 ± 250 
35°C – 3300 ± 181.5 
55°C – 1520 ± 98.8 
63°C – 1174 ± 88.0 
80°C – 670 ± 53.5 
90°C – 488 ± 41.5 
The above sketch shows the connectors of the NTC sensor on the Main P.C.B. Apply the
probes of the tester onto the relative connectors as shown.
From the component
Apply the probes of the tester onto the relative connectors as shown.

Page 12
1.7 Diverter
From the Main P.C.B. Connector:
6840 -±342 on the connectors KN6.1 – KN 2.9
The above sketch shows the connectors of the diverter on the Main P.C.B.
From the component
Apply the probes of the tester onto the relative connectors as shown.

Page 13
1.8 Float Switch
From the Main P.C.B. Connector:
0 (Position 1) on the connectors KN2.1 – KN2.5 Microswitch Inactive (No Water)
(Position 2) on the connectors KN2.1 – KN2.4 Microswitch Active (Water)
Position 1: You can check the floater by controlling the specified value intervals.
Position 2: If failure code has occurred related with the floater within control the above values;
you can figure out whether leakage occurs or not.

Page 14
1.9 Door Switch
From the Main P.C.B. Connector:
0on the connectors KN2.9 – KN2.2 (Door is closed)
The above sketch shows the connectors of the door switch on the Main P.C.B. Apply the
probes of the tester onto the relative connectors as shown.
From the component
Apply the probes of the tester onto the relative connectors as shown.

Page 15
1.10 Fan Motor
From the Main P.C.B. Connector:
238.6± 11.9 on the connectors KN 6.2 – KN 2.9
The above sketch shows the connectors of the fan motor on the Main P.C.B. Apply the probes
of the tester onto the relative connectors as shown.
From the component
Apply the probes of the tester onto the relative connectors as shown.

Page 16
1.11 Rinse Aid Sensor
From the main P.C.B. connector:
The above sketch shows the connectors of the fan motor on the Main P.C.B. Apply the probes
of the tester onto the relative connectors as shown.
From the component
1.12 ON/OFF Button
This component can’t be measured from the Main P.C.B. (PCB)
From the component
0 when button is pressed

Page 17
2. ELECTRICAL COMPONENT
SPECIFICATIONS
2.1 Circulation Pump
Brushless DC motors
• 0 – 3400 RPM range
• Winding value is immeasurable.
• Thermal protection software controlled.
• Pump output 0 - 80 l / min 0-400 mbar
• Power is from 0 - 60 watts.
Electronic card-controlled variable-speed
motor. Clockwise rotation in the opposite
direction, mounted on rubber hangers to the
base.
2.2 Drain Pump
Voltage : 220/240 Volt
Frequency : 50/60 Hz
Total Power : 30 W
Flowrate : 17 – 21 lt/min
Coil Resistance : 143±10 
Coil Isolation Class : F
Thermal Protection : 120°C
2.3 Heater Casing Group
2.3.1 Heater
Voltage : 220/240V
Total Power : 2000 W
Resistance : 23.95 ±15 
Used for heating the wash water.
The heater is not active in the drying process.
The inlet is mounted and placed on the
leading edge of the wash pump.
2.3.2 NTC
Thermal Protection: 83±3°C
Relative Temperatures:
25°C - 5000±250 
35°C - 3300±181.5 
55°C - 1520±98.8 
63°C - 1174±88 
80°C - 670±53.5 
90°C - 488±41.5 

Page 18
2.3.3 Pressure Switch
Voltage : 220/240 V
Frequency : 50/60 Hz (16 A – 3 Pins)
2.3.4 Diverter
Voltage : 220/240 Volt
Frequency : 50/60 Hz
Power : 8 W
Resistance : 6840 ±5 
2.4 Detergent Dispenser
2.4.1 Detergent Compartment:
Main wash compartment : 40cm³ (25/15)
Prewash compartment : 5cm³
2.4.2
Detergent Dispenser Bobbin:
Voltage 220/240 Volt
Frequency : 50/60 Hz
Resistance : 4450 ±10 
2.4.3 Rinse Aid Compartment:
Aid rinse cap : 150cm³
Factory outlet setting position : Level 3
2.4.4 Dispenser Rinse Aid Sensor:
Voltage : 250 V
Switched Current : 16 (4) A
Current through closed contact: 2.5 max.
2.5 Hose Inlet Valve Safety
Voltage : 220/240 Volt
Frequency : 50-60 Hz
Total Power : 8W
Flowrate : 3.5 lt/min
Resistance : 1960 ± 196 (20ºC)
Single inlet and single outlet standard single coil solenoid
valve. Assembled to the basement and connect to the air
break by hose.

Page 19
2.6 Door Lock
Is a mechanical lock/release system that holds the door
closed. It supplies connection of electrical parts in the
machine and cutting off the connection when door opens.
Current : 16 (4) A
2.7 ON/OFF Button
Assembled in the control panel unit ON/OFF (two pole)
Voltage : 250V
Current : 50mA
2.8 Fan Motor (where fitted)
Total Power : 15 W
Voltage : 220/240 V
Frequency : 50/60 Hz
Resistance : 238.6 ± 12 
Coil solation Class: H
There is a thermal protector. Shaded pole motor 2
pole temperature is between: -40ºC – 150ºC
2.9 EMC Filter
Voltage : 220/240V
Frequency
: 50/60 Hz
0.1 µf (X1) + 2x0.027 µf (Y2) + 1M 
To prevent electrical interference from the main supply.
Assembled to basement.

Page 20
2.10 Flowmeter
Located at the base of the Air Break, it
measures the amount of water input to the
machine with precise control.
2.11 Power Cord
Type: AU 3 x 1 mm² copper conductors
Isolation : TS 9760 H05VV-F
Plug : TS-IEC 60884–1, grounded PVC
Length : 1800mm