Electrolux 901EN Service Manual
SERVICE MANUAL
WASHING
© ZANUSSI ELETTRODOMESTICI
VIA GIARDINI CATTANEO, 3
I - 33170 PORDENONE (ITALY)
Fax (0434) 394096
599 33 49-01/7 1/27
Pubblication No,
599 33 49-01/7
980220
EN/SERVICE/EB
WASHING MACHINES
WITH TIMERS
124 92000.. / 124 92010..
FUNCTIONS:
VA30J - VB30J - VC30J
599 33 49-01/7 2/27
INDEX
General characteristics page 4/27
Operating principles page 5/27
Configuration of functions page 6/27
Safety features page 7/27
Washing programmes page 9/27
Washing cycle options page 11/27
Washing programme tables page 14/27
Basic circuit diagram page 22/27
Timer diagram page 24/27
Timer and electronic control board connections page 25/27
Troubleshooting page 26/27
599 33 49-01/7 3/27
GENERAL CHARACTERISTICS
The VA30J - VB30J - VC30J timers manufactured by AKO are used in certain washing machine models with spin
speeds from 900 rpm to 1500 rpm.
These are "hybrid" timers which consist of an electromechanical timer and an electronic control board (fitted to the
base of the washing machine).
FUNCTIONS VA30J VB30J VC30J
WASHING SYSTEM
RINSING SYSTEM
POSSIBILITY OF DELAYED START
TUB
JETSYSTEM JETSYSTEM JETSYSTEM
ANTI-FOAM ANTI-FOAM ANTI-FOAM
YES
STAINLESS STEEL AND CARBORAN
WATER FILL:
- "EUROPE" VERSION COLD
- "GB" VERSION HOT AND COLD
LEVELS
3 WATER FILL LEVELS CONTROLLED BY PRESSURE
SWITCHES
TYPE OF MOTOR
TEMPERATURE CONTROL
BY NTC SENSOR. THE WASHING TEMPERATURES MAY BE
COMMUTATOR
FIXED OR ADJUSTABLE USING A KNOB
599 33 49-01/7 4/27
LEVEL CONTROL
OPERATING PRINCIPLES
TEMPERATURE
SENSOR
g h
MOTOR
d
c
e
ELECTRIC
VALVES
f
WASHING MACHINE
COMPONENTS
ELECTRONIC CONTROL BOARD
CODES
a
b
TIMER
TIMER
MOTOR
a. The electronic control board (with microprocessor) powers the timer motor (via a TRIAC) so that it advances
through the various steps.
b. The duration and type of each washing phase depend on the closure of a series of timer contacts (codes).
The phases also depend on the configuration (different functions) and on the options selected using the keys
or potentiometers.
c. The drum motor is powered directly by the electronic control board via a TRIAC. Reversal of the direction of
rotation of the drum is performed by two relays fitted to the electronic board.
d. The electronic control board controls the speed of rotation of the motor according to a signal received from
the tachymetric generator.
e. A timer contact selects half the stator during the final spin cycles.
f. The hot (if featured) and cold water fill solenoids are powered by the electronic control board via a TRIAC and
selected by one of the timer contacts.
g. The temperature of the washing solution is controlled directly by the electronic control board via an NTC
sensor. The board also detects the closure of the contacts of the level pressure switch and the anti-foam
pressure switch.
h. All the other components of the washing machine are powered directly by the timer.
599 33 49-01/7 5/27
CONFIGURATION OF THE FUNCTIONS OF THE ELECTRONIC BOARD
The various functions of the washing programmes are configured according to the settings of the wiring
connectors on the electronic control board.
Configuration of functions VA30J - VB30J - VC30J
(connectors A and B)
VA30J:
Connectors A (P7 - P10) and B (P8 - P9)
connected to the board.
VB30J: Connector A (P7 - P10) connected to the board.
VC30J: Connector B (P8 - P9) connected to the board.
Selection of the "GB" function (hot and cold water)
This option can be selected for each of the different functions by connecting contacts J1-J2 on the electronic
board. If these contacts are not connected, the appliance is set to the "EUROPE" function (cold water only).
Selection of spin speed (connectors R1, R2, R3)
The configuration of the various spin speeds, which depends on the transmission ratio between the drum pulley
and the motor pulley, is by selecting the appropriate connections between contacts R1 - R6 on the electronic
board.
Configuration of the "G13" tub function (connector P2)
This function, used only for models with the "G13" stainless steel tub (54 litre drum) is configured using contacts
J1 - J4 on the electronic board.
599 33 49-01/7 6/27
SAFETY FEATURES
ANTI-UNBALANCING DURING SPINNING
Control of the balance of the load is performed while the drum rotates at between 45 rpm and 85 rpm, i.e. before
the spin cycle.
Final spin for COTTON cycles (CF / CFQ)
In these spin cycles, control of unbalancing is performed at two levels: 1.2 kg and 0.8 kg:
- if the unbalancing control detects unbalancing of less than 0.8 kg, the spin cycle is carried out normally.
- if the unbalancing is between 0.8 and 1.2 kg, the spin cycle is not carried out, and the drum is rotated at low
speed in an attempt to balance the load. The spin cycle is then restarted, and the unbalancing check is
repeated. If, after three attempts at balancing the load, unbalancing remains between 0.8 kg and 1.2 kg, the
spin speed is limited to 1000 rpm.
- if the unbalancing control detects unbalancing in excess of 1.2 kg, the spin cycle is not carried out, and the
drum is rotated at low speed in an attempt to balance the load. The spin cycle is then restarted, and the
unbalancing check is repeated. If the load is still unbalanced, this sequence is repeated for the entire duration
of the phase; thereafter, if the load is still unbalanced, the spin cycle is skipped.
Other spin cycles
For the intermediate spin cycles in programmes for COTTON, and spin cycles in those for SYNTHETICS,
DELICATES and WOOL, the unbalancing check is based on a single level: 1.2 kg.
- if the unbalancing control detects unbalancing of less than 1.2 kg, the spin cycle is carried out normally.
- if the unbalancing is in excess of 1.2 kg, the appliance performs the sequence described above for CF and CQ;
if the load remains unbalanced, the spin cycle is skippeed.
Drum movement with unbalanced load
rpm
85
55
45
0
sec
-55
3333
3
3
599 33 49-01/7 7/27
MOTOR PROTECTION
Power TRIAC for motor short-circuited
If the electronic control board detects a short-circuit in the TRIAC which powers the drum motor, it immediately
opens the relay contacts, thus disconnecting the motor for one minute; thereafter, power is restored to the motor.
If the malfunction persists, the electronic control board makes 4 attempts to restore power to the motor (at
intervals of 255 seconds), after which the cycle continues normally without motor movement.
Malfunction in tachymetric generator circuit
If a malfunction is detected in the tachymetric generator circuit, the electronic control board disconnects the motor;
if, after three attempts to restore power to the motor, the malfunction persists, the timer advances rapidly to
position 58.
Motor circuit-breaker open - motor windings interrupted
If one of these malfunctions should occur, the electronic control board disconnects the motor, and restores power
at periodic intervals.
If the circuit-breaker has tripped, the motor will be powered normally when the circuit-breaker is reset.
If the malfunction persists, the washing programme will be performed without movement of the motor.
PROTECTION OF HEATING ELEMENTS
Temperature sensor short-circuited or open
The heating phase is skipped.
Temperature sensor incorrectly set, heating element faulty
The heating phases have a maximum preset duration; after this period, the timer passes to the subsequent phase
even if the correct temperature has not been reached.
PROTECTION OF DRAIN PUMP
Drain pump faulty
The drain phases have a maximum duration of 3 minutes. After this period, the timer passes to the subsequent
phase even if the 1st level pressure switch is not closed in the "empty" position.
599 33 49-01/7 8/27
WASHING PROGRAMMES: "EUROPE" VERSION WITH COLD WATER
FIXED TEMPERATURES ADJUSTABLE TEMPERATURES
N° COTTON-LINEN Temp.
(°C)
Rinses COTTON-LINEN Temp.
(°C)
Rinses
1 Whites with pre-wash 95° 3 Whites/coloureds with pre-wash 30° - 95° 3
2 Whites 95° 3 Whites and coloureds 30 - 95° 3
3 Colour-fast coloureds 60° 3 - - -
4 Colour-fast coloureds,
60° 3 Whites and coloureds, light soiling 30° - 60° 3
light soiling
5 Delicate coloureds 40° 3 - - -
6 Rinses - 3 Rinses - 3
7 Conditioner - 1 Conditioner - 1
8 Spin - - Spin - -
9 Drying * - - Drying * - -
SYNTHETICS SYNTHETICS - MIXED FABRICS
10 Whites with pre-wash 60° 3 W hites / coloureds with pre-wash 30° - 60° 3
11 Whites 60° 3 W hites and coloureds 30° - 60° 3
12 Coloureds 40° 3 - - -
13 Short cycle 30° 3 Short cycle 30° 3
14 Rinses - 3 Rinses - 3
15 Conditioner - 1 Conditioner - 1
16 Drying * - - Drying * - -
DELICATES / WOOL DELICATES / WOOL
17 Wool 40° 3 W ool 40° 3
18 Delicates 40° 3 Delicates 30° - 40° 3
19 Rinses - 3 Rinses - 3
20 Conditioner - 1 Conditioner - 1
21 Short spin - - Short spin - -
22 Drain - - Drain - -
* Washer-dryers only.
Other special programmes can be selected using the keys as follows:
BIO (only for programmes 1, 2, 3, 4, 10 and 11)
-
SHORT CYCLE (only for programmes 1, 2, 3, 4, 5, 10, 11 and 12)
-
SOAK (only for programmes 1 and 10)
-
STAINS (only for programme 2 in versions with adjustable temperatures)
-
599 33 49-01/7 9/27
Loading...