Midea l712wmb16 User manual

Service Manual
Drum Washing Machine
Http://global.midea.com.cn
Note:
Before serving the unit,please read this at first,
Always contact wih your service center if meet problem.
Glory(6.0/7.0/8.0KG)

1. …...................................................................................................................
2. INTRODUCTION
2.1 Characteristics of product ..................................................................................................................
2.2 .............................................................................................................................
SAFETY PRECAUTION
OF WASHING MACHINE
Working principle
04
06
06
P.02
TABLE OF CONTENTS
3.TROUBLESHOOTING
.4 3 Fault tree
3.4.1 non-heating malfunctionMaintenance
...........................................................................................
12
3.4.2 Door non-locked & its maintenance
..............................................................................................
13
3.4.3 No water inlet or water inlet overtime ............................................................................................
14
3.4.4. Heating beyond the setting temperature its maintenance
.......................................…....................
15
3.4.5. of non-drain or drain exceed the setting timeMaintenance
............................................................
16
3.4.6. Water inlet overflow malfunction maintenance
............................................................................
17
3.4.7. Drum non-rotating malfunction maintenance
............................................................................... 18
3.4.8. water inlet and water outlet at the same time Maintenance
...........................................................
19
..........................................................................................................
4.1.1Undo the back cover .........................................................................................................................
4.1.2 Undo the top cover
.........................................................................................................................
4.1.3 Undo the control panel .....................................................................................................................
4.1.4 Undo the lower panel ...................................................................................................................
4.1.5 Undo the door lock ..........................................................................................................….........
4.1.6 Undo the front panel ....................................................................................................................
4. UNPACKING WAYS OF MAIN PARTS
4.1 Overeview the unpacking step
........................…........................................................................................
07
3.1 Malfuction and solution
4.1.11 Undo the inlet valve ....................................................................................................................
4.1.12 Undo the pressure switch ............................................................................................................
4.1.13 Undo the pulley ...........................................................................................................................
4.1.14 Undo the upper counterweight ...................................................................................................
4.1.15 Undo the absorber pin ................................................................................................................
4.1.16 Undo the filter .............................................................................................................................
4.1.7 Undo the faced conterweight ........................................................................................................
4.1.8 Undo the gasket ............................................................................................................................
4.1.9 Undo the PCB panel
.....................................................................................................................
4.1.10 Undo the detergent box ...............................................................................................................
4.1.18 Undo the heater ...........................................................................................................................
4.1.19 Undo the NTC temperature sensor ..............................................................................................
4.1.20 Undo the door glass .....................................................................................................................
4.1.21 Undo the panel support
...............................................................................................................
4.1.22 Undo the drum tub assembly
......................................................................................................
4.1.24 Undo the motor
21
21
21
22
22
22
20
24
24
25
25
26
26
23
23
24
27
27
28
28
28
...........................................................................................................................
29
26
4.1.17 Undo the drain pump .................................................................................................................
3.2 Sevice mode
.......................…....…..............................................................................................
09
26
4.1.23 Undo the absorber
.......................................................................................................................
29
3.3 Schedule of failure alarm
.......................…....…...............................................................................
11

P.03
TABLE OF CONTENTS
5. CIRCUIT DIAGRAM
6. EXPLORED VIEW & LIST OF PARTS
5.1 The failure diagnosing and changing components
6.1.5 Door_assembly
6.1.4 Dispenser_assembly
6.1.3 Top cover_sub
6.1.1 Cabinet_sub
6.1.2 Tub_sub
29
34
35
36
37
38
..........................................................................
...............................................................................................................................
..............................................................................................................................
........................................................................................…...............................
.................................................................................................................
.........................................................................................................................
6.1 Explored view & of PartsList 34
...................................................................................................
5.2 The circuit program & wiring connection figure .............................................................................. 30
5.3 The electric critical part .....................................................................................................................
31

1.SAFETY PRECAUTION
P.04
- If the supply cord is damaged,it must be replaced by the manufacturer,its service agent or similar
-ly qualified in order to avoid a hazard.
- The new hose-sets supplied with the appliance are to be used and that old hose-sets should not be
reused.
- This washing machine is for indoor use only.
- The openings must not be obstructed by a carpet.
- (This warning is only for EUROPEAN market )This appliance can be used by children aged from
8 years and and persons with reduced physical,sensory or mental capabilities or lack of experience
and knowledge if they have been given supervision or instruction concerning use of the appliance
in a safeway and understand the hazards involved. Children shall not play with the appliance.
Cleaning and user maintenance shall not made by children without supervision.
- (This warning is not for EUROPEAN market)This appliance is not intended for use by persons
(including children) with reduced physical, sensory or mental capabilities, or lack of experience
and knowledge, unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety.Children should be supervised to ensure that
they do not play with the appliance.
- Pull out its plug from the power socket before cleaning or maintenance.
- Make sure that all pockets are emptied.
- Sharp and rigid items such as coin,brooch,nail,screw or stone etc.may cause serious damages to
machine.
- Pull out its plug and cut off water supply after the operation.
- Please check whether the water inside the drum has been drained before opening its door.Please
do not open the door if there is any water visible.
- Pets and kids may climb into the machine. Check the machine before every operation.
- Glass door may be very hot during the operation.Keep kids and pets far away from the machine
during the
operation.
- Take care that power voltage and frequency shall be identical to those of washing machine.
- Do not use any socket with rated current less than that of washing machine.Never pull out power
plug with wet hand.
- To ensure your safety,power cord plug must be inserted into an earthed three-pole socket.Check
carefully and make surethat your socket is properly and reliably earthed.
- Children of less than 3 years should be kept away unless continously supervised.
- Kids should be supervised to ensure that they do not play with the machine.
- Packing materials may be dangerous to the kids.
Please keep all packing materials (plastic bags,foams etc) far away from the kids.
- Washing machine shall not be installed in bath room or very wet rooms as well as in the rooms
with explosive or caustic gases.
- Make sure that the water and electrical devices must be connected by a qualified technician in
accordance with the manufacturer's instructions and local safety regulations.
- Before operating this machine,all packages and transport bolts must be removed.Otherwise,the
washing machine may be seriously damaged while washing the clothes.
- Before washing the clothes at first time, the washing machine shall be operated in one round of
the whole procedures without the clothes inside.
- Your washing machine is only for home use and is only designed for the textiles suitable for
machine washing.
- The washing machine with single inlet valve only can be connected to the cold water supply. The
washing machine with double inlet valves can be connected to the hot water and cold water supply.

- Flammable and explosive or toxic solvents are forbidden.
Gasoline and alcohol etc.Shall not be used as detergents.
Please only select the detergents suitable for machine washing, especially for drum.
- It is forbidden to wash carpets.
- Be careful of burning when washing machine drains hot washing water.
- Never refill the water by hand during washing.
- After the program is completed, Please wait for two minutes to open the door.
- Please remember to disconnect water and power supply immediately after the clothes are washed.
- Do not climb up and sit on top cover of the machine.
- Do not lean against machine door.
- Please do not close the door with excessive forces.If it is found difficult to close the door,please
check if the excessive clothes are put in or distributed well.
- The household washing machine isn't intended to be built-in.
- Cautions during Handling Machine
1.Transport bolts shall be reinstalled to the machine by a specialized person.
2.The accumulated water shall be drained out of the machine.
3. Handle the machine carefully. Never hold each protruded part on the machine while lifting.
Machine door can not be used as the handle during the conveyance.
- Notes on disposal:
This marking indicates that this product should not be disposed with other household wastes
throughout the EU.To prevent possible harm to the environment or human health from
uncontrolled waste disposal,recycle it responsibly to promote the sustainable reuse of
material resources.To return your used device,please use the collection systems or contact
the retailer where the product was purchased. They return and can take this product for
environmental safe recycling.
2.SAFETY PRECAUTION
P.05

2.INTRODUCTION OF PRODUCTS
P.06
It is the latest designed machine, which have many advantages such as fashion, large rated washing
and large washing range. Specifically, its feature is as following:capacity
1.Large washing range from cotton to wool and silk.
2.Gentle washing: no twist and little abrasion.
3.Electron auto-balance system, that is, the PCB panel controls the speed of spin and ensures uniform
distribution of clothes to reduce the wear of textile caused by its vibration.
4.The drum of this machine is made of stainless steel of high quality and the cabinet is durable.
5.The maximum temperature of washing water could be controlled independently and it is up to 90℃.
6.Unique washing methods: rain, soak, throwing-knocking knead and so on, which can wash clothes
uniformly and improve washing performance.
7.Safety guard: water level control, door lock etc.
8.Anti-crease function: there is an automatic anti-crease and soak function in the synthetic program,
that’s, it doesn't drain at the end of washing and leave the clean extile in the water of the drum to
achieve the function of less crease, especially delicate.
9.Function of adjusting speed : select different spin speed according to textile.
10.Electronic water distribution system: The machine uses PCB to control the inlet valve and distribute
water properly at the different stages and dissolve detergent and softener absolutely to improve
performance.washing
2.2.Working principle
Drum washing machine wash clothes mainly in virtue of mechanical friction, chemical force and
temperature force. When the machine works, the motor runs clockwise several seconds and runs
anti-clockwise several seconds to drive the drum whose three lifters hold up the clothes pressing
the inside of the drum. When clothes rise close to the against top, because the speed of motor is low
and the centrifugal force is not enough to overcome the gravity, clothes fall and impinge with washing
liquid (like manual throwing-knocking washing). The second force is the extrusion force of clothes
(like manual extrusion). The last force is the friction between clothes, clothes and lifters(like manual
knead). To improve washing performance, automatic drum washing machine could automatically heat
the washing liquid, whose temperature can be adjusted from 0℃ to 90℃.
The high temperature quickens the movement of the numerator of the washing liquid and speedups the
2.1 haracteristics of product
C
Chemical reaction. In a word, drum washing machine destroys bonding force between dirt and clothes
in virtue of intergraded force of water, detergent and mechanical force, to clean away the dust.

3.TROUBLESHOOTING
SolutionDescription
The washing machine does not work Close the washing machine's door.
Confirm and press the start key.
Water leakage Correctly connect the inlet water pipe.
The spin of the clothes is abnormal Reload and distribute the laundry evenly in the drum.
Thereis the peculiar smell in the
washing machine Run a Self-clean cycle without any clothes.
No water is visible in the drum No fault-water is under the visible area.
There is the remaining water in the
softener's box No fault- the effect of the softener will not be affected.
The remaining detergent is left on
the clothes
The water-fast component of the non-phosphorus
detergent will be left on the clothes to form the line
scale. Plesae select or【 Spin 】programme or brush
away the fleck with the brush when the clothes is dried.
The washing machine does not fill
The washing machine fills and
empties at the same time.
Make sure the end of the drainage pipe to be higher
than the water level of the inside the machine .
Check if the drainage pipe and sewage have been
sealed, if they have been, there will be the poor
ventilation to cause the siphonage effect.
No drainage of the washing machine
Check if the drainage pumps is blocked.
Check if the drainage pipe is bent or blocked.
Check the height of the drainage nozzle, make sure it is
0.6-1 meter from the bottom of the washing machine.
Vibration of the washing machine
Level the washing machine.
Fasten the footing.
To check if the internal packing for the transportation
have all been removed.
Check the selection of .the procedure
Check the water
Put through the feed-water.
To check it the inlet water pipe is bent or blocked.
Close the washing machine's door.
Pressure to seeif the water pressure is insufficient.
Open the water tap.
The bubble spills from the detergent
box
Check if the detergent is excessive, if it is the
specialized detergent for the cylinder washing machine.
Reduce the usage amount of the detergent in the next
time's wash.
Dip one scoop of the softener mixed with 1/2 liter of
water to the detergent box II.
3.1 Malfuction and solution
P.07

3.TROUBLESHOOTING
The machine stops when the
procedure has not been finished Power failure or water cut.
The drainage pump has noise during
the operation when the water has
just been drained
To stop for some time during the
wash procedure
service centre.
If you cannot solve the above abnormal situations, would you please contact the nearest
The washing machine adds water automatically.
Because there is too much bubble in the tube, the
washing machine is cleaning the bubble.
SolutionDescription
The inner barrel water of the washing machine has
been drained but there is still a small amount of
water in the drainage pump and pipe. The drainage
pump continuously operates and takes in the air, and
at this time there is the noise, which is normal
situation.
P.08

3.TROUBLESHOOTING
P.09
Before entering into service mode, make sure no water remains in the inner drum, if not, select drain
only program to drain them out.
Turn on the machine and in 30s.
Press or to select test program. Press button to confirm your selection
and start the selected test. If you want to go back to test selection interface, press the button to
cancel previous selection.
3.2.1 Version switchover (t01)
1) Enter into service mode, LED displays “t01”
2) Press button, LED displays “0xx”.x means current version.
3) Press to confirm switchover.
4) Press or to change version.
5) Press button continuously for 3s to confirm your change.
6) Press button to close all output and exit this program. LED displays “t01”.
3.2.2 Error code checking (t02)
1) Enter into error code mode, LED displays “Err”. Press button and LED displays
EXX(x=1,2,3….)
2) Press to show the last code and press to show the next code. The latest 10 error codes
can be found in system, and same error code is recorded one time even if it occurs more than one time
3) If no error information found, LED shows E00.
4) Press and button at the same time continuously for 3s, after hearing the beep, all the
error codes records deleted, LED displays E00.
5) Press button to exit, LED display t02.
3.2.3 Version information checking (t03)
Version information checking is used to show the current version information stored in nonvolatile
memory applications.
1) Enter into service mode, LED displays “cod”.
3) Press button, LED displays version number.
4) Press to go back to version information checking status, LED display “t03”.
3.2.4 UI Checking (t04)
1) Press button to illuminate the whole LED display.
2) Press button, the whole LED display flashes.
3) Press to stop flash, LED display “t04”
take turns [K2] [K4] [K2] [K4] buttons
[K2] [K3] [K5]
[K5]
[K5]
[K4]
[K2] [K3]
[K4]
[K5]
[K5]
[K2] [K3]
[K2] [K3]
[K5]
[K5]
[K2]
[K5]
[K5]
[K5]
[K5]
2) Press , LED displays project number.
3.2 Sevice mode
Start/Pause
K1 K2 K3 K4 K5

3.TROUBLESHOOTING
P.10
3.2.6 Pressure switch checking (t06)
1) Enter into service mode, drain out the water, LED displays LL.
2) Press button to activate inlet valve. LED displays level frequency once water lever get
the main wash level.
3) Press
3.2.7 Water temperature sensor and heater checking (t07)
1) Press button to activate the main inlet valve and get the water lever to heating level then
turn on the heater and 5 min later turned off automatically.
2) After heater turned on, LED displays the current temperature. Detect the real temperature of inner
drum and check with the numbers on the display.
3) Press button to exit, LED displays “t07”
3.2.8 Inlet valve checking (t08)
Enter into service mode, drain out the water, LED displays “UU”
Press button, LED displays “u3”and switch on the main wash inlet valve for 10 min.
4) Press button, LED displays “u2” and
3.2.9 Rotating checking (t09)
1) Enter into service mode, LED displays “tUB”
2) Press button, inner drum rotates in 45r/m clockwise for 15s and stop for 10s then rotates
counterclockwise for 15s, over and over again.
3) Press button to turn off the motor and exit, LED displays “t09”.
3.2.10 Spin speed checking (t10)
1) Press to enter into service mode, LED displays “spn”.
2 he number on the display goes up in the same pace with the real speed
and when it reach 400rpm, you need to press button to get the machine to reach its target speed.
( if declared speed ≥1000rpm, target speed is 1000rpm and if declared speed ＜1000rpm,target speed is
its declared speed)
3) Press button to exit and LED displays “t10”.
3.2.5 Drain pump checking (t05)
1) Enter into service mode, LED displays “PPt”.
2) Press button to drain out all the remaining water. If all water drained out, LED displays
“EP”，and 6 minutes later ,if there is still water remains in it, LED displays “FP”.
3) Press button to exit, LED displays “t05”
1)
2)
3) Press button, LED displays “u1” and switch on prewash valve for 5s.
switch on the main wash inlet valve for 5s.
5) Press button to switch on main wash and prewash valve and get the water lever to setting
level, then drain out the water.
) Press button again, t
[K5]
[K5]
[K5]
[K2] button 4 times to start water inlet valve for water supply, after the water level reaching
the overflow line, drain out all the water.
[K5]
[K5]
[K5]
[K2]
[K2]
[K2]
[K5]
[K5]
[K5]
[K5]
[K2]
[K5]
3.2 Sevice mode

P.11
3.3 Schedule of failure alarm
3.TROUBLESHOOTING

P.12
3.4 Fault tree
Reliable connection
Y
N
Whether the connect
is well
Change NTC
Y
N
Whether NTC is short
or open circuit
Y
Whether the pressure
switch is well or not
N
YChoosing new heating
temperature
Y
Whether to set up
non-heating
Non-heating
Whether the heater
is well
NChange the heater
Y
Change the control panel
Maintenance non-heating malfunction1.
3.TROUBLESHOOTING

P.13
2. Door non-locked & its maintenance
Close the door correctly
Whether the door is
closed correctly
Y
N
NPush the start button
to start the program
N
Reliable connection
The door is
invalid and should
be replaced
lock
Y
Y
Y
Y
N
Door non-locked
Whether push the
start /pause button to
start theprogram
Change the control panel
Whether the voltage
between harness 1 and
harness 3 is about 220v
Whether the harness
connection between the
door lock and the main
board is well
3.TROUBLESHOOTING

P.14
Change main board
Y
Whether the
connection is well
N
Door is invalid and
should be replaced
lock
Y
N
Y
Whether the door
is closed correctly
N
Y
Y
Whether the tap is opend
Y
No water inlet or
water inlet overtime
N
Y
N
Y
Y
N
N
N
Change the inlet valve
N
N
Change the control panel
Whether the
switch is well
pressure
Y
N
Y
Push start/pause button
Cleaning with brush
Change the
switch
pressure
3. No water inlet or water inlet overtime
Whether press
start/pause button
after choosing the
program
Whether door
lock 3 and 2 is
connected correctly
Whether the voltage
between door lock 1
and 3 is 220V
Whether the
electromagnetic
valve buzz
Whether the
connections of inlet
valve is well
Whether the inlet pipe
is fold or the water is
cut off
Whether the
inlet valve coil is
well
Whether the inlet filter
net is blocked
Whether the
connection of
pressure switch is
well
Connect
connections
3.TROUBLESHOOTING
Y

P.15
4. Heating beyond the setting temperature its maintenance
Change NTC
Y
Whether the
connection is well
N
Whether NTC is
short circuit or
open circuit
Y
加热过度
Y
Change the control panel
Over heating
3.TROUBLESHOOTING

P.16
N
Y
N
Whether the
door lock is
well
Close the door Whether the
door is closed
Y
Y
Non-drain or
overtime drain
Change
panel
the control
N
Reliable connection
N
N
Y
Return to the normal station
Change the
drain pump
Y
Cleaning the
filter
N
Y
N
Y
Y
5. Maintenance of non-drain or drain exceed the setting time
Whether it is in
the state of pause Push start/pause button
Whether the
pump is vibrating
Whether the
connection between
the pump and the main
board is loosened
Whether the
pump is blocked
or burned out
Whether the filter
is blocked
Whether the drain
pipe is fold or hung
too high
3.TROUBLESHOOTING
The means of detecting door
switch refers to the paragraph
of "no water inlet".

P.17
6. Water inlet overflow malfunction maintenance
Hang the hose well
Whether the drain
hose is hung up
Y
N
YC
inlet valve
hange the inlet
Y
NReliable connection
Y
Y
N
Y
N
Water inlet overflow
Whether the electric
connection of pressure
switch is normal
Change the control panel
Whether the water
is in without power
Whether the gas pipe
or the connection is
leaking or deadlock
Change or revive
the gas pipe
Whether the
switch is well
pressure
3.TROUBLESHOOTING

P.18
7. Drum non-rotating malfunction maintenance
Change the control panel
NThe drum is blocked
Drum non-rotating
Y
Whether the door
is closed correctly Close the door
Whether the door
lock is well
Y
NChange the door lock
N
Y
Y
Y
Whether the motor
is well
Whether the
connection of main
and auxiliary wiring
harness is well
NReliable connection
Y
Whether the inlet
is correct
NWaiting inlet or inspect
overtime water inlet
malfunction
Whether the
switch is well
pressure
Y
Y
NReplace it
NReplace it
Detach strap,
whether the drum
is rotating flexibly
3.TROUBLESHOOTING

P.19
8. Maintenance water inlet and water outlet at the same time
Whether the washer is
disposing the foam in
the drum
Change the control panel
N
Y
Normal phenomenon
Y
Water inlet and water outlet
at the same time
Whether the drain hose
is hung too low
N
Y
Hang the hose well
3.TROUBLESHOOTING

P.20
4.UNPACKING WAYS OF MAIN PARTS
4.1 Overeview the unpacking step
1.
2. Undo top cover
3. Undo the control panel
4. Undo the lower panel
5. Undo the door lock
6. Undo the front plate
7.
8. Undo the gasket
9. Undo the PCB panel
10.Undo the detergent box
11.Undo the inlet valve
12.Undo the pressure
13.Undo the pulley
14.Undo the upper counterweight
15.Undo the absorber pin
16. Undo the filter
17.Undo the drain pump
18.Undo the heater
19.Undo the NTC
20.Undo the door glass
21.Undo the panel support
22.Undo the drum tub assembly
24.Undo the motor
Undo the back cover
Undo the facade counterweight
23.Undo the absorber