Electrolux W475N - W4330N Service manual

Service Manual
W475N, W485N, W4105N,
W4130N, W4180N, W4250N, W4330N
Classic Control
438 9226-71/EN
07.04
Contents
Contents
Safety Precautions........................................................................................ 5
Technical data............................................................................................... 7
Machine presentation ................................................................................ 17
Description............................................................................................. 17
Function.................................................................................................. 18
Programme unit...................................................................................... 19
Door lock................................................................................................ 20
Heating................................................................................................... 21
Water connections.................................................................................. 21
Rear control unit..................................................................................... 21
Detergent compartment......................................................................... 22
Drain valve.............................................................................................. 22
Control unit ................................................................................................ 23
Description............................................................................................. 23
Front control unit.................................................................................... 24
Jumpers on program selector card........................................................ 25
Rear control unit..................................................................................... 31
Level control . ............................................................................................. 37
Control and fault tracing . ...................................................................... 37
Water level check .................................................................................. 38
Water level is too high ........................................................................... 38
Thermostat.................................................................................................. 39
Data........................................................................................................ 39
Description ............................................................................................ 39
Repair instructions ................................................................................ 40
Replacing the thermostat ...................................................................... 40
Door and door lock..................................................................................... 41
General................................................................................................... 41
The door lock locks the door ................................................................ 42
The door lock unlocks the door............................................................. 43
Error codes............................................................................................. 44
Reset button........................................................................................... 45
Door lock control inputs/outputs............................................................ 45
Repairs................................................................................................... 48
Emergency opening of door lock .......................................................... 48
Replacing the door lock......................................................................... 49
Motor........................................................................................................... 51
Description............................................................................................. 52
Principle wiring....................................................................................... 53
Motor overload protector....................................................................... 54
Repairs................................................................................................... 55
Motor replacement................................................................................. 55
Adjustments........................................................................................... 57
Drain valve................................................................................................... 59
Function . ............................................................................................... 59
Repairs................................................................................................... 60
Disassembly........................................................................................... 60
Assembling............................................................................................. 61
Contents
Detergent compartment.............................................................................. 63
Heating........................................................................................................ 65
Description ............................................................................................ 65
Electric heating....................................................................................... 66
Steam heating........................................................................................ 66
Repairs................................................................................................... 67
Replacing the heating elements............................................................. 67
Coin-meter.................................................................................................. 69
Setting wash price.................................................................................. 69
Programming the current price.............................................................. 71
Price reduction....................................................................................... 72
Regular maintenance ................................................................................. 73
Daily........................................................................................................ 73
Every third month................................................................................... 73
Safety Precautions
Safety
This machine can only be used with water. Never use dry cleaning agents.
Do not allow children to operate the machine.
Do not hose down or spray the machine with water.
All mechanical and electrical installation must be carried out by qualified personnel.
Do not bypass the door locking device.
Should the machine malfunction, please report the fault to the technician responsible for the machine.
All external equipment which is connected to the machine must be
CE/EMC-approved and connected using an approved shielded cable.
The manufacturer reserves the right to make changes to design and
com­ponent specifications.
Technical data
Technical data
W475N
W485N
W4105N
W4130N
W4180N
W4250N
W4330N
Innerdrum
volume
diameter
litres mm 75
520
85
520
105
595
130
595
180
650
250330
725
795
Drum speed
wash
extraction
rpm 52
52
49
49
44
44
42
528
528
494
494
471
446
427
4.8/9.3
13
x
x
10.7/18
x
x
11/23
x
x
81
Heating
electricity
kW
steam
hot water
2.0/3.0/ 2.0/3.0/5.63.0/6.5/3.0/6.5
5.4/5.6/7.5 5.4/7.5
7.5/10
7.5/10
x
x
x
x
x
x
x
x
G-factor
81
81
81
81
81
81
kg 130
136
160
175
228
287330
W485N
W4105N
W4130N
W4180N
Weight, net
Connections
W475N
Water valves
connection
W4250N
W4330N
DN20
DN20
DN20
DN20
DN20
DN20
DN20
BSP 3/4"3/4"3/4"3/4"3/4"3/4"3/4"
Rec. water pressure
kPa 200-600
200-600 200-600
200-600 200-600
200-600
200-600
Functioning limits
for water valve
kPa 50-1000
50-1000 50-1000
50-1000 50-1000
50-1000
50-1000
l/min 20
20
20
20
60
60
60
Drain valve
outer Ø mm 75
75
75
75
75
75
75
Draining capacity
l/min 170
170
170
170
170
170
170
DN15
1/2"
DN15
1/2"
DN15
1/2"
DN15
1/2"
DN15
1/2"
DN15
1/2"
DN15
1/2"
Capacity
at 300 kPa
Steam valve
connection
BSP Rec. steam pressure kPa 300-600300-600300-600300-600300-600300-600300-600
Functioning limits for
steam valve
kPa 50-800
50-800
50-800
50-800
50-800
50-800
50-800
Technical data
1
2
3
4
5
6
7
8
9
10
Electrical connection
Cold water
Hot water
Steam connection
Drain
Liquid detergent supply
Control panel
Soap box
Water reuse
Door opening, W475N, W485N: ø310, W4105N: ø365, W4130N: ø395, W4180N, W4250N, W4330N: ø435
A
B
C
D
E
F
G
H
I
K
L
M
N
O
P
R
W475N
660
690 1115355 725 825
45 1030 215 1010 130
830385
-
100
210
W485N
660
730 1115355 765 825
45 1030 215 1010 130
830385
-
100
210
W4105N
720
705 1200365 740 910
45 1115 215 1095 130
910
420
-
100
235
910
420
W4130N
720
790 1200365 825 910
45 1115 215 1095 130
-
100
235
W4180N
750
880 1325 435 915 1035
45 1245 130 1225 210 1040325
295
100
225
W4250N
830
955 1410 495 990 1120
45 1330 160 1290 245 1125325325
100
265
W4330N
910 1040 1445 500 1075 1155
45 1365 160 1325 245 1155 280325
100
210
A
8
7
2
N
B
G
I
3
L
4
9
6
1
10
C
H
K
M
F
5
D
5281
5282
P
5283
Front
R
5
E
Rear side
Right side
3
N
W475N-W4130N
O
L
G
I
4
2
9
6
1
F
M
K
H
P
5459
5
Rear side
R
W4180N-W4330N
Technical data
W475N
W485N
W4105N
W4130N
W4180N
W4250N
W4330N
9.3
9.3
8.7
8.7
7.9
8.3
7.5
1.4±3.5
1.7±4.1
2.8±5.3
Frequency of the
dynamic force
Hz
Max floor load
at extraction
KN 1.1±2.8 1.2±3.1
2.2±4.73.8±6.0
Technical data
10
W475N
Heating
alternative
Voltage
alternative
Total
kW
Fuse
A
No heating
or Steam heating
El
heating
190-200
V 3 AC
230-240
V 1 AC
200-240
V 3 AC
240
V 3 AC
380-415 V 3/3N AC
200 V 3 AC
230 V 3 AC
230 V 3 AC
230 V 3 AC
230-240 V 1 AC
230-240 V 1 AC
230-240 V 1 AC
230-240 V 1 AC
220-240 V 3 AC
220-240 V 3 AC
220-240 V 3 AC
380-415 V 3/3N AC
380-415 V 3/3N AC
380-415 V 3/3N AC
415 V 3/3N AC
415 V 3/3N AC
415 V 3/3N AC
440/480 V 3 AC
400/230 V 3/3N AC
1.1
0.9
1.1
0.75
1.1
10
10
10 10
10 5.5
3.0
5.3
7.2
5.5
7.5
2.0
2.9
3.0
5.3
7.2
3.1
5.3
7.2
3.3
5.7
7.8
7.8
7.2
20
10
16
25
25
35
16
16
10
16
25
10
10
16
10
10
16
16
16/25
Technical data
11
W485N
Heating
alternative
Voltage
alternative
No
heating
or
Steam heating
El
heating
120
V 1 AC
190-200 V 3 AC
208-240
V 1 AC
200-240 V 3 AC
200 V 3 AC
230-240
V 1 AC
230-240 V 1 AC
230-240 V 1 AC
208-240 V 1 AC
230-240 V 1 AC
220-240 V 3 AC
220-240 V 3 AC
208-240 V 3 AC
220-240 V 3 AC
Total
kW
Fuse
A
1.3
1.3
1.1
1.3
16
10
10
10
5.5
2.2
3.2
5.5
6.9
7.5
3.1
5.3
6.9
7.2
20
16
16
35
35
35
10
16
25
25
Technical data
12
W4105N
Heating
alternative
Voltage
alternative
No
heating
or
Steam heating
El
heating
190-200 V 3 AC
200-240 V 3 AC
380-415 V 3/3N AC
415 V 3N AC
415-480 V 3 AC
400-415 V 3/3N AC
200 V 3 AC
200 V 3 AC
230 V 3 AC
230 V 3 AC
220-240 V 3 AC
220-240 V 3 AC
220-240 V 3 AC
380-415 V 3/3N AC
380-415 V 3/3N AC
380-415 V 3/3N AC
415 V 3/3N AC
415 V 3/3N AC
415 V 3/3N AC
440/480 V 3 AC
400/230 V 3/3N AC
400/230 V 3/3N AC
Total
kW
Fuse
A
1.5
1.6
1.6
1.6
1.6
1.6
10
10
10
10
10
10
5.5
7.3
3.1
7.2
3.1
7.2
9.5
3.1
7.2
9.5
3.3
7.8
10.3
10.3
7.2
9.5
20
25
16
25
16
25
35
10
16
16
10
16
16
16
16/25
16/35
Technical data
13
W4130N
Heating
alternative
Voltage
alternative
heating
No
or Steam
heating
heating
El
190-200
V 3 AC
208-240 V 1 AC
200-240
V 3 AC
230-240
V 1 AC
380-415
V 3/3N AC
415 V 3N AC
400-415 V 3/3N AC
415-480 V 3 AC 200 V 3 AC
200 V 3 AC
220-240 V 1 AC
230-240 V 1 AC
220-240 V 1 AC
230-240 V 1 AC
220-240 V 1 AC
230-240 V 3 AC
220-240 V 3 AC
220-240 V 3 AC
220-240 V 3 AC
380-415 V 3/3N AC
380-415 V 3/3N AC
380-415 V 3/3N AC
415 V 3/3N AC
440/480 V 3 AC
Total
kW
Fuse
A
1.6
1.2
1.7
1.4
1.7
1.7
1.7
1.7
10
10
10
10
10
10
10
10
5.6
7.3
3.1
3.2
7.2
7.5
9.5
9.9
3.2
7.3
9.6
3.2
7.3
9.6
10.4
10.4
20
25
16
16
35
35
50
50
16
25
35
10
16
16
16
16
Technical data
14
W4180N
Heating
alternative
Voltage
alternative
No
heating
or
Steam heating
El
heating
190-200 V 3 AC
208-240 V 1 AC
200-240
V 3 AC
400-415/230
V 3/3N AC
380-415 V 3/3N AC 415 V 3N AC
415-480 V 3 AC
200 V 3 AC
220-240 V 1 AC
230 V 3 AC
220-240 V 3 AC
380-415 V 3/3N AC
415 V 3/3N AC
440/480 V 3 AC
400/230 V 3/3N AC
Total
kW
Fuse
A
2.1
2.3
2.1
2.1
2.1
2.1
2.1
10
16
10
10
10
10
10
9.5
12.5
12.5
12.5
12.5
13.4
13.5
12.5
35
63
50
50
25
25
20
25/50
Technical data
15
W4250N
Heating
alternative
Voltage
alternative
heating
No
or Steam heating
heating
El
190-200 V 3 AC
208-240
V 1 AC
200-240
V 3 AC
380-415 V 3/3N AC
415-480 V 3 AC
200 V 3 AC
230 V 3 AC
220-240 V 3 AC
380-415 V 3/3N AC
415 V 3/3N AC
440 V 3 AC
480 V 3 AC
400/230 V 3/3N AC
Total
kW
Fuse
A
2.8
2.8
2.8
2.8
2.8
10
16
10
10
10
13.2
17.2
17.2
17.2
18.6
18.7
18.7
17.2
50 50
50
35
35
35
25
35/50
Technical data
16
W4330N
Heating
alternative
Voltage
alternative
heating
No
or Steam heating
heating
El
190-200 V 3 AC
200-240
V 3 AC
380-415
V 3/3N AC
415-480 V 3 AC
200 V 3 AC
220-230 V 3 AC
230 V 3 AC
240 V 3 AC
380-400 V 3N AC
415 V 3/3N AC
440V 3 AC
480 V 3 AC
400/230 V 3/3N AC
Total
kW
Fuse
A
1.7
1.9
1.7
1.9
10
10
10
10
15.4
19.2
20
20.7
19.2
20.7
21.9
23.7
20
50
63
63
63
35
35
35
35
35/63
Machine presentation
Machine presentation
17
1
Description
1
The machines covered in this manual include the
following models:
Drum volume Model name
(litres)
75
W475N
85
W485N
105
W4105N
130
W4130N
180
W4180N
250
W4250N
330
W4330N
The machines feature an electromechanical programme unit with fixed washing programmes.
The machines are supplied to customer specifications with e.g. electric or steam heating or no
heating.
The machines are designed for installation in
hotels, laundries (such as apartment buildings
and coin laundries), factories, hospitals, various
institutions, etc.
5203 A
Machine presentation
18
Function
This section presents a general overview of the functions of the machine.
Most functions are then presented in detailed in separate chapters in this
service manual.
2
2
Water inlet valves
Detergent compartment
Motor relays
Rear control unit
Programme unit
Control panel
Outer drum
Door
Door lock
Motor
Heating elements
Frame
Drain valve
5916
Machine presentation
Programme unit
3
4
The control panel has a rotary switch for selection of fixed machine programmes and a combined start/pause button with rapid advance.
19
3
Programme unit
The programme unit controls the water valves,
drain valve and heating via the communication
card in the rear control unit. This unit can also
be connected to send control signals to external
units for detergent pumps.
The programme unit of the machine is described
in detail in section Programme unit.
5916
4
Programme unit
A1
Communication card A21
Drain, water, detergent
Heating
element
Water
valves
Drain
valve
K21
Voltage
supply
5190
Machine presentation
20
Door lock
5
6
5
Door lock control
The door lock is an electro-mechanical type with
double safety switches. The lock is bi-stable,
i.e., it needs to receive an active pulse from the
control in order both to lock and unlock the door.
A separate printed circuit board, called door lock
control, can be fitted onto the programme unit.
This board controls locking and unlocking. The
card has separate checks for empty drum and
stopped drum. Together with the checks built
into the programme unit, this guarantees that the
door cannot be opened by a mistake.
The door lock on the machine is described in
detail in section Door and door lock.
Door lock
6108 A
6
Door lock
control
A31
Level
guard
B2
Programme unit
A1
Motor
module A107
Door lock
A41
M1
Rotation sensor B3
5191
Machine presentation
Heating
7
When using electric heating, the water for washing is heated by three heating elements accessible from the front of the machine.
7
21
Rear control unit
Main power switch
Contactor K21 (heating)
The machine can also be fitted with steam heating using a steam valve fitted on the rear of the
machine.
The heating system of the machine is described
in detail in section Heating.
Water connections
7
Depending on the machine size and customer
specifications, the machine has one, two, three
or four inlet valves.
This unit also holds eight connectors for external
detergent supply.
Supply voltage
connection
Communication
card
Water connections
Rear control unit
7
This box contains the main power switch or a
connection block for the input voltage, heating
contactor and a communication card with outputs that control the water and drain valves of
the machine as well as the heating. There are
also connection blocks for connection to e.g., an
external detergent supply.
The rear electric box of the machines is described in detail in section Control unit.
Heating elements
5182, 5916
Machine presentation
22
Detergent compartment
8
The compartment is divided into four for prewash, main wash, rinse and bleaching-agent/liquid detergent.
8
Detergent compartment
The detergent compartment of the machine
is described in detail in section Detergent
compartment.
Drain valve
8
This valve is a diaphragm valve that opens and
closes by way of the water pressure. The control
valve is situated next to the water valves.
The drain valve of the machine is described in
detail in section Drain valve.
Drain valve
5916
Control unit
23
Control unit
Description
The control unit of the machine consists of the following parts:
1
• Front control unit
This unit contains an electro-mechanical programme unit A1, a safety
control card for the door lock (door lock control A31), thermostat B1,
level switch B2 and 4 and rotary switch S5.
• Rear control unit
This module contains the main power switch Q1 with a connection for
received voltage, the heat contactor K21 and the communication card
A21 with outputs for e.g. external detergent supply.
1
Front control unit
A31
Door lock
controller
S5
Rotary switch
program selector
B1
Thermostat
B2
Level switch
Rear control unit
B4
Level switch
wash program
Q1
Main power switch
A21
Communication card
A1
Programme unit
K21 Heater contactor
K22 Heater contactor
(only on larger machines)
5925, 5182, 5916
Control unit
24
Front control unit
2
Programme unit A1
2
Front control unit
The programme unit is electromechanical and
has up to 10 fixed programmes (depending on
program).
S5
Rotary switch program selector
The programme unit is described in detail in
section Programme unit.
B2
Level
switch
Level guard B2
2
Control of the water level and turning of the
drum are controlled with a backup guard, to ensure that the door will not open with water in the
drum or when the drum rotates.
Apart from a level guard on the programme unit
card, there is a level guard B2, connected to the
door lock control A31. This card controls door
locking action as well as the level and drum rpm
speed.
Level guard B4
2
A31
Door lock
controller
B1
Thermostat
B4
Level switch wash program
A1
Programme
unit
Controls the water level for low and high level in
wash programs.
Thermostat B1
2
Controls the wash temperature and closes the
heating relay or steam valve when selected temperature is reached.
Rotary switch S5
Rotary switch for selecting wash program.
5925
Control unit
Jumpers on program selector card
3
Jumpers are assembled on the program selector
card. These jumpers can be moved or removed
to obtain new functions for the wash programs.
25
3
Program selector card
Program OG01
4
Jumper on A gives a correct function of valve
Y25 (W4180-4330N). Y25 will flush in both pre
wash and in main wash.
Jumper B gives a correct function of valve Y25
(W475-4130N). Y25 will flush only in pre wash
and not main wash.
Jumper on C is bleaching function. It is recommended when compartment 4 is used for
bleaching agent or if bleaching agent is supplied from a pump unit. There will be a flushing in
compartment 4 during 30 seconds, 3.5 minutes
after selected temperature is reached. Note! The
pump signal, on connection X72:5 will appear 30
seconds before the flushing of compartment 4.
Jumper on D is main wash function. It is recommended when compartment 4 is used for main
wash detergent or if main wash detergent is
supplied from pump.
Jumper on F gives a correct function of valve
Y12 (W4180-4330N). There are no Y22 valve on
these machines.
Jumper on G. (W4180-4330N with only cold
water inlet). The signal for Y25 (hot inlet) will give
cold inlet (Y15) instead.
Jumper on H for the machines (W4180-4330N
without inlet valve Y35 will give cold inlet (Y15)
instead and for the machines (W475-4130N
without inlet valve Y35 will give cold inlet (Y11) in
compartment 1 instead.
Jumper I (no heat). On machines without heating
or machines with support heating. The wash
program will not stop and wait for the selected
temperature.
5471
Control unit
26
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6053, 5477
Control unit
Program OL02
5
Jumper on A gives correct function of Y25 (W4180-4330N).
Y25 will flush in pre-wash and in main wash.
Jumper B gives correct function of Y25 (W475-4130N).
Y25 will flush in pre wash and not main wash.
Jumper on C is bleaching function. It is recommended when compartment
4 is used for bleaching agent or if bleaching agent is supplied from a pump
unit. There will be a flushing in compartment 4 during 30 seconds, 3.5
minutes after selected temperature is reached. Note! The pump signal, on
connection X72:5 will appear 30 seconds before the flushing of compartment 4.
Jumper on D is main wash function. It is recommended when compartment 4 is used for main wash detergent of if main wash detergent is supplied from pump.
Jumper on E gives a correct function of valve Y15 (cold water).
The valve Y15 will open in main wash (W4180-4330N).
Jumper on F gives a correct function of valve Y12 (W4180-4330N).
There are no Y22 valve on these machines.
Jumper on G. (W4180-4330N with only cold water inlet). The signal for Y25
(hot inlet) will give cold inlet (Y15) instead.
Jumper on H for the machines (W4180-4330N) without inlet valve Y35 will
give cold inlet (Y15) instead and for the machines (W475- 4130N) without
inlet valve Y35 will give cold inlet (Y11) in compartment 1 instead.
Jumper I (no heat). On machines without heating or machines with support
heating. The wash program will not stop and wait for the selected temperature.
Jumper J (short program). If the jumper isn’t connected the agitation time
in the wash program will be twice as long. Pre wash will be changed from
3 to 6 minutes, main wash from 6 to 12 minutes and rinsing time from 1 to
2 minutes.
27
Control unit
28
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Program OL02
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6054, 5478
Control unit
Program OL03
6
Jumper on A gives correct function of Y25 (W4180-4330N).
Y25 will flush in pre-wash and in main wash.
Jumper B gives correct function of Y25 (W475-4130N).
Y25 will flush only in pre wash and not main wash.
Jumper on C is bleaching function. It is recommended when compartment
4 is used for bleaching agent or if bleaching agent is supplied from a pump
unit. There will be a flushing in compartment 4 during 30 seconds, 3.5
minutes after selected temperature is reached. Note! The pump signal, on
connection X72:5 will appear 30 seconds before the flushing of compartment 4.
Jumper on D is main wash function. It is recommended when compartment 4 is used for main wash detergent of if main wash detergent is supplied from pump.
Jumper on E gives correct function of valve Y15 (cold water).
The valve Y15 will open in main wash (W4180-4330N).
Jumper on F gives a correct function of valve Y12 (W4180-4330N.
There are no Y22 valve on these machines.
29
Control unit
30
6
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Program OL03
6055, 5475
Control unit
Rear control unit
31
7
Main power switch Q1
7
The main power switch interrupts all received
power phases and is placed on the outside of
the connection box cover.
The cover cannot be removed unless the main
power switch is turned to the 0 position.
Main power switch Q1 Heating contactor K21
The received voltage supply is connected to the
lower screw post of the main power switch, alt.
the terminal connection.
Heating contactor K21
7
This contactor is only featured on machines with
electric heating.
It activates the three heating elements at the
front, lower part of the outer drum. It is controlled by the programme unit A1 and thermostat
B1.
Heating contactor K22
7
Voltage supply
connector
Heating contactor K22
(only larger machines with six heating
elements)
This contactor is only featured on larger machines.
It activates the three heating elements, with a
total of four circuits, situated at the front, lower
part of the outer drum. It is controlled by the
programme unit A1 and thermostat B1.
5182
Control unit
32
Communication card
• Fuses F11 and F12 (1.25 A)
These protect the received voltage supply for
the programme unit and door lock controller.
Communication card
• Output connection blocks
Control signals for connection to external
system such as detergent supply.
Card No. Function
Outputs (110-240V AC)
5182
9
X81
���
Liquid supply 4 (Bleach)
X41
���
Liquid supply 3 (Softener)
X72:5 ���
X72:4 ���
Liquid supply 2 (Main wash)
X42
X53
���
Liquid supply 1 (Pre wash)
X72:3 ���
Common
X72:2 X43
���
X72:1 X44
���
L1 Door locked
���
0 V Door locked (common)
X71:2 X45
���
X71:1 ���
see Payment system
���
X70
���
9
This communication card contains:
���
8
8
X52
X51
X50
X46
X47
X48
X49
6052
Control unit
Option card
10
33
10
The option card is only available on machines
with programme OL03.
Option card
5182, 5475
34
11
12
Control unit
There are some possibilities to alter the standard
parameters in the wash programs by moving or
adding jumpers on the option card.
11
3 spare jumpers
• When adding a jumper on N or M gives warm
rinses instead of cold. M shall be used on
W475N-W4130N and N on W4180N-W4330N.
5600
12
5601, 5602
Control unit
13
14
15
• When adding a jumper on O there will be no pre-wash in the programs.
The timer rapid advances the pre-wash automatically. Remember that "Delicate" is always without pre-wash.
35
13
• When adding a jumper on P there will be two rinses instead of three. The timer rapid advances the first rinse.
• If the jumper on Q is removed the main wash will be extended by three minutes to nine minutes instead of six.
5603
14
5604
15
5605
36
16
Control unit
• In standard position on R, low level is used in pre-wash, main wash and high level in rinses.
If jumper is moved to S it will be high level
also in pre-wash and mainwash.
16
5606
Level control
Level control
1
2
37
1
The level switch is a pressure sensor controlling two different drum water levels by sensing
air pressure in a hose connected to the drum’s
bottom. When the water rises in the drum and
hose, the air in the hose compresses and, at two
preset pressure levels (shut-off levels), two different alternating contacts in the pressure sensor
are activated.
When the water drains from the drum, the contacts switch back to original position, but now at
lower water levels than was required to activate
the contacts when the drum was being filled.
These levels are called minimum levels. If the
water level during washing falls below the minimum level, water will be added until the shut-off
level is again reached.
Control and fault tracing
All level sensors are factory-set for the various
machines. As a rule, this setting should not be
changed. For that reason, the level controls are
sealed with enamel paint.
A faulty level switch can not be repaired and
should be replaced.
The machine guarantee ceases to be valid if the level sensor is tampered with.
1198
Level control
38
Water level check
2
Start the machine and select a standard program. Check low water level for prewash and
main wash according to the illustration. Advance
the program using the START button and check high water level for rinsing.
2
Low level
High level
21
22
24
11
12
14
Water level is too high
• Check that the hose connecting the level
switch and the drain valve is not obstructed.
When necessary and when the machine is
empty of water, clean the hose by disconnecting it from the level switch and blowing air
through it.
• Check the hose for holes which can be caused by the hose rubbing against the pulley.
• Overfilling can also be caused by burnt contacts in the level switch. If this is the case,
replace the level switch.
1417
Thermostat
Thermostat
39
1
Data
Range off-on
approx. 4°C
X123
1
Max. temperature for sensor 150°C
Sensor medium
6
Liquid
Description
1
The thermostat monitors the temperature while
the machine carries out a program. The heating
element contactor is controlled using open and
closed contacts.
The thermostat sensor is located at the lowest
point of the outer drum to the left of the heating
element. A liquid-filled cable (capillary tube) runs
from the sensor to the thermostat, located in the
automatic control unit. The water temperature
controls the liquid expansion and thereby the
activation of the various thermostat contacts.
1453
Temperature selection (contact selection) (90°C,
60°C, 40°C or 30°C) is controlled by the programmer and the program selector.
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5977
Thermostat
40
Repair instructions
All thermostats are factory-set for the various machines. As a rule, this
setting should not be changed. For that reason, the thermostats are sealed
with enamel paint.
The machine guarantee ceases to be valid if the thermostat is tampered with.
Replacing the thermostat
• Remove the front panel and pull out the thermostat sensor.
• Undo the capillary tube strapping and replace the thermostat. Install the
new capillary tube in the same way as the old one.
Door and door lock
Door and door lock
41
8
General
The door locks consists of the following:
1
Emergency opening button
• Door lock A111, which contains
- An actuator that locks the door lock and
also has two built-in micro switches, S4a
and S4b. The actuator is bi-stable, i.e., it
has two stable positions: locked door and
unlocked door. The actuator must receive
a pulse to lock and unlock the door lock.
S4a and S4b are both closed when the
door is locked.
- A micro switch S3 that is closed when the
door is closed.
- An emergency opening arm/emergency
opening button that can be used to open
the door lock in an emergency.
2
• Door lock controller A31 situated in the front
control unit of the machine. This card controls the door lock function and supervises
whether the drum is empty and not turning.
It locks and unlocks the door lock when the
programme unit requests door locking or unlocking.
X96 (to door lock control A31)
X30 (to programme unit A1)
6112
9
Door lock controller A31
5184, 5916
Door and door lock
42
The door lock locks the door
3
When the door is closed (closed door lock
switch S3), the programme unit may request
door locking by applying a voltage of 110-240 V
on the door lock controller A31 input X92.
The following check is made by the A31 card
prior to locking of the door:
• No water in drum - input X93 from level guard B2 is closed = 0 V
• Motor not engaged - input X94 from motor
control A107 open = 5 V
• Drum not turning - no pulses on input X95
from rotation sensor B3.
When the above conditions are met, the card
A31 outputs a closing pulse on output X96 to
the door lock actuator/coil, which then locks the
door. The micro switches S4a and S4b in the
actuator/door lock are closed when the door is
locked. These micro switches feed voltage to:
• The output switches on the programme unit.
The switches control the machine’s drain and
water valves as well as heater switch-on.
• Interlock signal enables motor operation.
Programme operation is now possible.
3
Door lock
control
A31
X93
Level
guard
B2
X95
X94
Programme
unit A1
X92
X31
X96
X27 X24
X304
Motor X302
module
A107
X30
Door lock
A41
M1
Rotation sensor B3
5191 B
Door and door lock
The door lock unlocks the door
4
43
4
The programme unit requests door unlocking by
applying 0 V on input X92 of the door lock controller.
The following check is made prior to unlocking
of the door:
• No water in drum - input X93 from level guard B2 is closed = 0 V
Door lock
control
A31
X93
X95
X94
Programme
unit A1
X92
X31
X96
X27 X24
X30
• Motor not engaged - input X94 from motor
controller A107 open = 5 V
• Drum not turning - no pulses on input X95
from rotation sensor B3.
When the above conditions are met, the door
lock controller outputs an opening pulse on
output 96 to the door lock actuator/coil, which
then unlocks the door. Micro switches S4a and
S4b now interrupt the relays/switches. The drain,
water valves, heater and motor cannot now be
switched on.
Level
guard
B2
X304
Motor X302
module
A107
Door lock
A41
M1
Rotation sensor B3
5191 B
Door and door lock
44
Error codes
5
5
The door lock control has three LEDs that show
whether the door lock operates normally or
whether an error has been detected. During
normal operation, the LEDs blink when the drum
is not turning and are off when the drum rotates.
In case of an error, the three LEDs will show the
error condition according to the table below. If
an error disappears, the error code condition
disappears. If the error is still present at the programme end, the error is automatically cleared
after 5 minutes and the door is unlocked.
A
LEDs
B
C
●
●
No error. The drum is not turning
(LEDs blinking)
❍
❍
❍
No error. The drum is rotating
Error state
●
●
❍
Level guard B2 indicates water in
drum when the door lock is open
(input X93 not closed).
❍
●
●
Motor control indicates that motor
is operating when door lock is open
(input X94 not open).
●
❍
❍
No signal from rotation sensor B3
(frequency input X95 < 0.4 Hz) in spite
of the motor control indicating motor
operation (input X94 open).
❍
●
❍
No signal from motor control (input
X94 not open) in spite of rotation
sensor B3 indicating motor operation
(frequency input X95 > 0.4 Hz).
●
❍
●
Error in drive circuits for door lock
(output X96) or error in door lock/cable
harness for the door lock.
❍
❍
●
Internal error in the door lock control.
❍ = no lit,
● = lit
LEDs
B
C
Normal operation
●
LEDs
A
B
C
A
Reset button
5184
Door and door lock
Reset button
5
6
The door lock control features a reset button
used to reset the programme routines stored in
the computer. When pressed, any error codes
are erased.
Door lock control inputs/outputs
6
45
X90: AC 110-240 V AC feed
X91: Transfer of voltage supply
Feeds the voltage to programme unit A1.
X92: Input from programme unit: Lock door
Prior to the door lock control locking the door
(output X96), a check is made for any water left
in the drum (input X93 closed) and whether the
drum is not rotating (input X94 open).
200240 V
Voltage
supply to A1
Level guard
B2
X90
2
X91
Programme unit requests door locking
0 V:
Programme unit requests door opening
1
2
X93
1
2
X94
1
2
B3
X95
1
2
1
2
X92
Input voltage X96 Function
110-240 V AC:
Door lock control A31
1
X31
1
3
Motor relays
Programme unit
A1
5193
Door and door lock
46
7
X93: Input from level guard
If the input indicates “Water in drum” when the
door is not locked, the door cannot be locked.
The LEDs then show the error code ● ● ❍.
Input voltage Function X93
5 V DC:
Water in drum (level guard open)
0 V:
Drum empty (level guard closed)
X94: Input from motor control
7
200240 V
Voltage
supply to A1
Level guard
B2
If the input indicates “Motor operating”, the door
cannot be locked. The LEDs then show the error
code ❍ ● ●.
The input signal from X94 is compared with the
signal from the rotation sensor B3 (input X95).
Door lock control A31
1
2
X91
1
2
X93
1
2
X94
1
2
B3
X95
If the motor signal is operating, but the rotation
sensor does not provide a signal, the error code
● ❍ ❍ is shown.
If the rotation sensor indicates motor rotation
when there is no motor signal, the error code ❍ ● ❍ is shown.
X90
1
2
1
2
X92
X31
1
3
Motor relays
Programme unit
A1
Input voltage Function X94
5 V DC:
Motor not operating (input closed)
0 V:
Motor operating (input open)
5193
Door and door lock
8
X95: Input from rotation sensor on motor
shaft
9
When the motor is operating, a pulse train is
applied on the input.
47
8
Rotation sensor
B3
X95
Input
Function
Pin 1:
DC 4-10 V feed
Pin 2:
0V
Pin 3:
DC 5 V pulse input
Door lock control A31
1
2
3
Unlocks +
Locks -
X96: Output to door lock
Locks the door lock when the following conditions are met:
1
+
2
X96
• DC 110-240 V AC on input X92 (programme
unit requests door locking).
• DC 0 V on input X93 (no water in drum).
• DC +5 V on input X94 (motor not operating).
Y80
• No pulses on input X95 (drum not rotating).
Door lock A41
• No error code present.
Unlocks the door lock when the following conditions are met:
5194
• DC 0 V on input X92 (programme unit requests door unlocking).
• DC 0 V on input X93 (no water in drum).
9
• DC +5 V on input X94 (motor not activated).
• No pulses on input X95 (drum not rotating).
• No error code present.
Voltage
Function
17 - 31 V DC, + on pin 1, - on pin 2 Unlocks the door
17 - 31 V DC - on pin 1, + on pin 2 Locks the door
X96
X95
5184
Door and door lock
48
Repairs
10
Repair work on the machine should only be
done by specially trained personnel.
Emergency opening of door lock
10
1. Take down power from the machine by turning the main power switch to the 0 position.
2. Remove the front cover or top cover. When
replacing the door lock, it is recommended to
remove the front cover.
3. Pull the emergency opening arm to the side.
This retracts the spring-loaded locking pin
and the door lock opens.
Alt. Press down the emergency opening button.
4. Reset the emergency opening correctly.
5369, 6111
Door and door lock
Replacing the door lock
1. Take down power from the machine by turning the main power switch
to the 0 position.
2. Remove the front cover alt. side pole.
3. Remove the door (two screws in each hinge).
4. Remove the front panel.
5. Remove the door lock (three holding screws).
6. Verify the strap positions on the cable for the lock. Cut the necessary
straps to undo the cables leading to the lock.
7. Undo the connectors.
8. Replace the door lock.
9. Reconnect the new (door) lock.
10. Assemble in reverse order.
11. Strap the cables for the lock according to the notes made in step 6.
49
50
Motor
Motor
DANGER
Be careful when measuring capacitors and filter.
51
Motor
52
Description
1
The motor is fitted in a bridge carrier under the
outer drum. It drives the washing drum using a
drive belt.
1
The motor is controlled by contactors.
The motor winding is protected against overloads using a thermal overheating protector that
is automatically reset.
The motor is connected directly to the motor
module via a cable with quick connectors.
Motor
Rotation sensor
B3
5467, 5465
2
Programme unit
A1
Rotation control card
A31
X94
X24 X27
X26
X95
B3
X97
Thermal protection
Motor
Contactors
A107
1 or 3-phase
5975
Motor
53
Principle wiring
3
Single phase
Wash speed (18-pole)
K1
3
4
1
2
K2
3
4
Extract speed (2-pole)
1
2
3
4
K4
1
2
Black
Aux
Main
Black
Blue
C1-2
21
22
K4
White
Blue
21
White
C3-6
A
22
A
Only machines with start switch
Note! Some machines may hav overcurrent protection. This is not shown here.
C3-6
5973
Three phase
5
6
3
4
1
2
K1
5
6
3
4
5
6
1
2
K2
Black
Black
Blue
Blue
White
White
3
4
1
2
K4
5974
Note! Some motors are possible to change from Y to D-connection to accomodate different voltages.
Motor
54
Motor overload protector
4
4
The motor is equipped with one or more thermal overload protectors. The protectors are
connected in series and will trip at a temperature of 150 ± 5°C.
A burned out motor can be re-wound.
Some single-phase machines are also equipped with a manual resettable overload protector mounted on the extract relay in the motor
module. This overload protector protects the
motor during the start-up of the extraction.
0304
Motor
Repairs
55
5
Main power switch
Repair work on the machine should only be
done by specially trained personnel.
Motor replacement
Disassembly
5
1. Take down power from the machine by turning the main power switch to the 0 position.
2. Remove the rear cover.
3. Undo the bracket for the drain hose connector from the lower rear piece, then remove the
rear cover.
6
4. Undo the ground connection from the motor.
5. Remove the drive belt by pulling the belt
towards you while rotating the drum by hand.
6. Undo the motor cable from motor.
7. Undo and remove the motor mounting bolts.
8. Lift out the motor.
5916
6
Rotation sensor
B3
5465
Motor
56
Assembly
1. Fit the new motor without locking the mounting bolts.
2. Fit the drive belt and adjust the belt tension with the tensioner on one
side of the motor. Se section Adjustments - Drive belt tension for details.
3. Connect the new motor to the cable and use straps to secure the cable.
4. Connect the motor cable to the motor.
5. Fit the lower rear piece and secure the drain hose connection with
screws.
6. Fit the upper rear piece.
7. Connect the voltage supply and verify that the motor operates normally.
Motor
Adjustments
57
7
Drive belt tension
The drive belt is pre-tensioned upon delivery
from the factory.
7
The drive belt tension should be as follows:
Model
Force A Post tensioning B New belt C
(N)
(mm)
(mm)
W475N35
W485N35
W4105N
40
W4130N
40
W4180N
60
W4250N
68
W4330N
45
8
8
9
8
8
9
8
8
6
8
7
7
7
7
6
To adjust drive belt tension, first undo the motor
retaining screw a couple of turns, then press
down on the motor to achieve proper tensioning.
Lock the locking nut when the tension is correct.
Then lock the retaining screw.
B, C
A
Adjust drive belt tension if values exceed
those shown in the table.
5194
Inspection of the drive belt tension is an
important part of general maintenance.
8
Locking nut
Adjusting screw
Retaining screw for drive belt tension
5184
Drain valve
Drain valve
1
59
7
The drain valve is situated on a flange at the bottom of the outer drum and can be accessed from
the front after removing the front cover.
The drain valve consists of the following principal
parts:
• Lower part with rubber diaphragm.
• Piston and cylinder.
• Pressure plate and recoil springs.
• Rubber diaphragm with drain connection.
• Upper part with connection for outer drum.
Function
2
The drain valve uses the water pressure in the
cold-water inlet to close the valve. A feed hose
is connected between the water inlet and the
control valve.
When the control valve operates (drain valve
should be closed), the control valve opens the
water pressure onto the feed hose, which is connected to the lower part of the drain valve. When
the lower part is filled with water, the lower part
diaphragm pushes up the piston. The piston lifts
the pressure plate against the drain valve rubber
diaphragm, which in turn forms a seal against
the outer drum, effectively closing the valve.
When the drain valve should be opened, the
control valve changes position to allow the water
pressure to the lower part of the drain valve to
close, instead opening the return hose to the
drain. The pressure plate recoil springs pull the
pressure plate back, upon which the piston is
pressed back into the cylinder. The water from
the lower part is fed through the feed hose and
the control valve to the drain.
Drain valve
5916
8
Feed hose
Return hose
Control valve
Feed hose
Rubber diaphragm with
drain connection
Pressure plate
Recoil springs
Cylinder
Piston
Diaphragm
Lower part
Principal diagram
3359
Drain valve
60
Repairs
3
Main power switch
Repair work on the machine should only be
done by specially trained personnel.
Disassembly
For repair works on the drain valve, there is
a risk that water still left in the machine may
flood onto the floor. Be sure to dry up any
spilled water since it may cause people to
slip and hurt themselves.
3
1. Take down power from the machine by turning the main power switch to the 0 position.
2. Remove the front cover.
5916
4
Upper part
Rubber diaphragm
with drain connection
3.
Disconnect the drain hose from upper part of
4
the valve.
5
Pressure plate
4. Undo the hose clamp holding the valve rubber bellows against the sleeve coupling of the
outer drum.
6. Disconnect the pressure hose from the lower
part of the valve.
7. Replace the valve with a new one or replace
the defective part.
Cylinder
Piston
5. Loosen and unscrew the 4 retaining nuts of
the valve a couple of turns (use a socket,
extender and ratchet wrench). Turn the valve
and unhook it from the bolts.
Recoil spring
Diaphragm
Lower part
Nipple for connection
of feed hose from
control valve
101772
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5
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5222
Drain valve
Assembling
4
1. Connect the pressure hose to the lower part of the valve. Verify that the
hose is not bent or pinched.
2. Fit the rubber bellows onto the sleeve coupling.
3.
Hook the valve onto the bolts and turn the valve into position. Secure
5
the 4 retaining bolts of the valve.
4. Secure the hose clamp at the connection of the rubber bellows on the
sleeve coupling.
5. Connect the drain hose to the upper part of the valve.
3
6. Turn the main power switch to position 1 and verify correct valve operation and that it does not leak.
7. Reattach the front cover.
61
62
Detergent compartment
Detergent compartment
The detergent compartment of the machine is
designed for use with powder and liquid detergent. The compartment is divided into four subcompartments as follows:
1
63
1
Detergent compartment
• Compartment 1 – For pre-wash with powder or liquid detergent.
2
• Compartment 2 – For main wash with
detergent powder.
• Compartment 3 – Rinse.
• Compartment 4 – Main wash with liquid
detergent or,
bleaching-agent.
The connections for incoming water are situated
on the rear side of the compartment. Compartments 3 and 4 each have one connector, while
compartments 1 and 2 each have two connectors, one for cold water, the other for warm
water.
The detergent is routed from the bottom of the
compartment to the outer drum through the
combo module immediately behind the compartment.
5916
To safeguard against overfilling, e.g., due to a
blocked hose on its way to the drum, the combo
module features an overflow drain directly connected to the drain of the machine.
2
Compartment 2: Main wash, powder detergent
Compartment 1: Pre-wash
with powder or liquid
detergent
Compartment 4: Main wash, liquid
detergent or bleaching-agent
Water connections
Overflow drain
Water connections
Compartment 3; Rinse
To washing drum
5209
64
Heating
Heating
1
Heating contactor
Description
1
65
The heating system of the machine consists of:
• Three heating elements for heating the water
in the drum.
• A temperature sensor to detect the water
temperature in the drum.
• One or two heating contactors for switch-on/
switch-off of the heating elements.
The heating elements and the temperature sensor are situated at the bottom of the outer drum
close to the edge. They can be accessed front
the front after the front plate is removed.
The contactor(s) is(are) placed in the rear control
unit.
Depending on the size of the machine, the following heating elements are available:
Machine
model
Heating element size
(kW)
W475N3x0.665, 3x1, 3x1.8, 3x2.5
W485N3x0.665, 3x1, 3x1.8, 3x2.5
W4105N3 x 3.3
W4130N3 x 3.3
W4180N3 x 4.33
W4250N3 x 6
W4330N3 X 7.66
Heating elements and
temperature sensor
5182, 5916
Heating
66
Electric heating
2
2
The three heating elements in the machine are
connected to separate phases and are switched
on and off using one or two heating contactors,
K.21 and K22 (two contactors are used for higher heating power). The heating contactors are
controlled by the programme unit and thermostat B1.
Heating
elements
Card
A21
The programme unit receives information on
the water temperature in the machine from the
thermostat situated in the outer drum. The programme unit controls the heating contactors to
achieve the set water temperature for the current
washing programme.
When there is no water in the drum, the programme unit prevents switch-on of the heating
elements. If an error would nevertheless cause
the elements to switch on, a slow-blow fuse triggers to switch them off again.Then the heating
element has to be changed.
Steam heating
3
Programme
unit Al
K21
5205
Temperature
sensor
Voltage supply
Heating
elements
Programme
unit A1
The steam valve is controlled by the programme
unit A1. The control signal goes via the communication card A21.
Card
A21
K22
K21
5202
Temperature
sensor
Voltage supply
3
Steam
valve
Y51
Programme
unit A1
Card
A21
Rear control unit
Temperature sensor
5208
Heating
Repairs
67
4
Main power switch
Repair work on the machine should only be
done by specially trained personnel.
Replacing the heating elements
Wen replacing the heating elements, there is
a risk that water still left in the machine may
flood onto the floor. Be sure to dry up any
spilled water since it may cause people to
slip and hurt themselves.
4
1. Take down power from the machine by turning the main power switch to the 0 position.
2. Remove the front cover.
3.
Make a note of how the heating elements are
5
connected.
4. Disconnect the connection to the heating
element to be replaced.
5. Unscrew the nut between the connections
approx. 1 cm.
6. Push on the nut and bolt to undo the expansion bracket from the outer drum.
7. Remove the old heating element and install
the new one. Be sure that the rear edge is
fitted into the element holder at the rear of the
outer drum.
8. Assemble in reverse order.
5916
5
Heating element
Temperature sensor
5204
68
Coin-meter
69
Coin-meter
Setting wash price
• Pull out the coin box.
• From inside of the coin meter casette the different settings can be
reached.
1
5
4
2
3
6
7
1
1
1. is the switch S1 for setting the ratio between coin 1 and 2 if the coin
meter has two slots. If only one coin, all switches shall be set in OFF
position.
2. is the switch S2 for setting the price.
3. is the switch S3 for price reduction.
4. is coin one, input for coin sensor one.
5. is coin two, input for coin sensor two.
6. Yellow LED flashes with frequency 3 Hz, the value left to insert and indicates accepted coin, lit 1 second.
7. Green LED flashes, relation coin 1 and coin 2. Continously lit when start
relay is activated.
5718
Coin-meter
70
2
Switch S1 is used for setting the ratio between
the two coins. If the coin meter only have slot
for one coin, all switches shall be placed in OFF
position.
2
The following combination is available (ON = 1).
Switch
Example
Ratio 1:2
Ratio 1:4
Ratio 2:5
1
0
1
0
1
0
1
0
23
0
0
0
0
1
0
1
0
0
1
0
1
1
1
4
0
0
0
0
0
0
0
Ratio
1:1
1:2
1:4
1:5
1:10
1:20
2:5
Value 2 is twice the value of 1.
Value 4 is four times the value of 1.
Value 5 is two and half times the value of 2.
OFF
ON
� � � �
5720
Coin-meter
Programming the current price
71
3
Programming is carried out on the switch unit,
where the switches correspond to values from 1
to 64 when they are set on position ON.
First calculate the value I which the switches will
give together and then set the switches so that
they will give this number.
I = (P x A)/V where
P = price per program,
A = first number in coin ratio. When counter unit is for single coin insertion A is always 1.
OFF
� � � � � � �
� � � � �� �� ��
V = value of coin. When counter unit is for double slot, the lower value.
3
Ex. 1
P = 2 EURO 50 cent
Ratio 1:2 (1 EURO and 50 cent coins)
ON
5721 A
4
A = 1
V = 50
I =
4
(250 x 1)/50 = 5
The switch should be set to 5 which can be achieved by setting switches 1 and 3 in position ON (1 + 4 = 5).
OFF
� � � � � � �
� � � � �� �� ��
Ex. 2
P = 1 EURO 50 cent
Ratio 2:5 (10 cent and 25 cent coins)
A = 2
V = 10
I =
5
ON
(150 x 2)/10 = 30
The switch should be set to 30 which can be achieved by setting switches 2, 3, 4 and 5 in position ON (2 + 4 + 8 + 16 = 30).
Ex. 3
P = 90 pence
Ratio 2:5 (20 and 50 pence)
A = 2
5721 B
5
OFF
� � � � � � �
ON
� � � � �� �� ��
V = 20
I = (90 x 2)/20 = 9
The switches should be set to 9 which can be achieved by setting switches 1 and 4 in position ON (1 + 8 = 9).
5721 C
Coin-meter
72
Price reduction
5
If one want to have price reduction for a certain
day, etc switch S3 can be used.
5
The following combinations are possible
(ON = 1).
Switch
1
0
1
0
1
2
0
0
1
1
Reduction
0%
25%
50%
75%
OFF
ON
� �
5722
Regular maintenance
Regular maintenance
To maintain correct and proper functioning and to prevent interruption of
service, the following maintenance scheme should be adhered to.
The maintenance interval should be adapted to how frequently the machine is used.
Daily
• Check the door and door lock:
- Let the door remain open and try starting the machine. The machine
should not start.
- Close the door, start the machine and try opening the door. It should
not be possible to open the door until the drum has stopped turning.
- Check that the door does not leak.
- Clean the door seal, removing any detergent and fluff.
• Check that the drain valve does not leak during the wash cycle.
• Clean out any detergent remaining in the detergent compartment. Rapid
advance through a program and let the water rinse the compartment:
Every third month
May only be carried out by authorized personnel.
• Check that the door does not leak.
• Check the drain valve and remove any fluff.
• Inspect the interior of the machine (during an actual wash cycle to ensure that no leaks are noticed) by:
- Turning of the main power switch of the machine.
- Remove the top cover and the protective front and rear plates.
73
74
Regular maintenance
- Verify that all internal hoses do not leak.
- Inspect the drive belt. Adjust the tension or replace if necessary.
- Check that water does not leak onto the floor.
- If the heating time is unusually long, check the heating elements. If
the water is very hard, check whether there are lime deposits on the
heating elements. Decalcify the elements if necessary. Adapt the
amount of deliming agent to the manufacturer’s guidelines.
- Never switch on the heating elements when there is no water in the
machine. This will cause the slow-blow fuse to trigger.
- Inspect the shock absorbers and coil springs.
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