ELECTROLUX WASHING MACHINE EWFH12280 – EWM2100HEC Front-loader – TROUBLESHOOTING - DISASSEMBLY
EWM2100
– EWFH 12280W Front-loader Electrolux Washing machine _ Troubleshooting _ Disassembly _ Wiring Diagram.
DIAGNOSTIC SYSTEM
Access to diagnostics
Switch off the appliance removing the plug from the socket.
Insert the plug into the socket and within two seconds push the buttons simultaneously. PL2 and PL4.
The diagnostic cycle starts:
checking all LEDs (switching on each LED for 0.5”)
checking the buzzer with a long BEEP
checking all LEDs (switching on each LED for 0.5”)
checking the buzzer with a long BEEP
If the diagnostic cycle does not identify any faulty component,
all LEDs light up till the end of the test and the buttons and the relays are
now checked. If some faults are
identified, all LEDs flash (and the check of the buttons and relays cannot be
executed).
checking the buttons and the relative relays:
* Push button PL4 (START/PAUSE) and the relay which powers the drying top activates.
* Push button PL3 (TIME) and the relay which powers the fan activates.
* Push button PL2 (TEMPERATURE) and the relay which powers the heater activates (during this check the temperature control is active in order to avoid the damages caused by the too high temperature).
* Push button PL1 (ON/OFF) and the relay which powers the drying top deactivates, the appliance switches off.
checking the buttons and the relative relays:
* Push button PL4 (START/PAUSE) and the relay which powers the drying top activates.
* Push button PL3 (TIME) and the relay which powers the fan activates.
* Push button PL2 (TEMPERATURE) and the relay which powers the heater activates (during this check the temperature control is active in order to avoid the damages caused by the too high temperature).
* Push button PL1 (ON/OFF) and the relay which powers the drying top deactivates, the appliance switches off.
To exit the diagnostic system, switch off the
appliance.
BUZZER
The appliance is normally supplied by the factory with the buzzer deactivated. The activation/deactivation can be carried out only during the setting phase.
The appliance is normally supplied by the factory with the buzzer deactivated. The activation/deactivation can be carried out only during the setting phase.
Switch off the appliance
Push ON/OFF button
Push buttons PL2 and PL3 simultaneously
After some seconds, the buzzer emits a “beep” which indicates that
it is activated. To deactivate the
buzzer, repeat the same operations till a “beep” is heard.
Buzzer signal
A short “beep” is generated when a button is pushed.
A longer “beep” is generated at the start of the programme or when the ON/OFF button is pressed to interrupt a drying cycle.
Three “beeps” are generated at the end of a drying cycle.
A short “beep” is generated when a button is pushed.
A longer “beep” is generated at the start of the programme or when the ON/OFF button is pressed to interrupt a drying cycle.
Three “beeps” are generated at the end of a drying cycle.
DRYING Cycle
1.Fan
2.Heater
3.NTC sensor
2.Heater
3.NTC sensor
The air enters the slots located in the rear part of the drying
top, sucked by the tangential fan (1) and pushed towards the heater (2) which
heats it up.
The heated air flows inside the top and exits through the holes of the top to dry the cloth placed above.
The air temperature is controlled by a NTC sensor that varies its ohmic value depending on the heat degree.
The electronic circuit, reading these variations, powers or not the heater so as to maintain the temperature within the limits in order not to damage the cloth.
Besides the NTC sensor, there are two thermostats with Manual Reset, which intervene if for any reason the temperature reaches excessive values, cutting power to the heater.
The heated air flows inside the top and exits through the holes of the top to dry the cloth placed above.
The air temperature is controlled by a NTC sensor that varies its ohmic value depending on the heat degree.
The electronic circuit, reading these variations, powers or not the heater so as to maintain the temperature within the limits in order not to damage the cloth.
Besides the NTC sensor, there are two thermostats with Manual Reset, which intervene if for any reason the temperature reaches excessive values, cutting power to the heater.
DRAIN CIRCUIT
Drain hose of drying top
The drying top features a drain hose (1) connected to the pump
body, which allows draining the water collected at the bottom of the top, due
to a too humid cloth, or by an accidental spilling of a liquid over the top.
Start the DRAIN program of the washing machine before every drying cycle.
Start the DRAIN program of the washing machine before every drying cycle.
Drying heater
The drying heater is armored, inserted in a watertight stainless
steel tubular casing. Its electric power
is 800W.
Checking the efficiency
IT DOES NOT HEAT
Check if the heating element is interrupted, measure is the value between the two terminals is 65 Ohm.
Check if the heating element is interrupted, measure is the value between the two terminals is 65 Ohm.
INTERVENTION OF ELECTRICAL SAFETY CUT-OUT
Check with an ohmeter if the heating element is not connected to
mass and check for current leakage (40MOhm).
Tangential fan
The tangential fans are used where the space is limited and a big
air mass, a low noise level and at the same time a regular flow are needed.
Checking the efficiency [IT DOES NOT WORK]
Check if the motor is jammed.
Measure if between the terminals the value of the stator winding resistance is 190 Ohm.
Check if the motor is jammed.
Measure if between the terminals the value of the stator winding resistance is 190 Ohm.
Manual reset thermostat
Some appliances feature safety thermostats with manual reset.
Inside there is a bi-metal disk, which if the temperature is higher than the one set for this thermostat, switches on and opens the contacts. For a correct operation, it is necessary to push manually the relative button placed between the terminals, to set the bi-metal to the initial position.
In case of intervention of the thermostats, after resetting or replacing them, verify the causes that provoked it (such as: no ventilation, fan jammed, etc.)
Inside there is a bi-metal disk, which if the temperature is higher than the one set for this thermostat, switches on and opens the contacts. For a correct operation, it is necessary to push manually the relative button placed between the terminals, to set the bi-metal to the initial position.
In case of intervention of the thermostats, after resetting or replacing them, verify the causes that provoked it (such as: no ventilation, fan jammed, etc.)
Checking the efficiency
Check with a tester if there is a resistance of zero Ohm between the contacts.
Heat the thermostat bulb and check that the contacts commutate.
Check with a tester if there is a resistance of zero Ohm between the contacts.
Heat the thermostat bulb and check that the contacts commutate.
NTC temperature sensor (General
characteristics)
The NTC sensor is used to check the drying temperature. It is made in a way so that its internal heater decreases while the temperature increases. The decrease of the heater is detected by the electronic control, which, when the desired temperature is reached, switches off the heating element.
The NTC sensor is used to check the drying temperature. It is made in a way so that its internal heater decreases while the temperature increases. The decrease of the heater is detected by the electronic control, which, when the desired temperature is reached, switches off the heating element.
Check with a tester if there is a resistance of 20KOhm at room
temperature (25°C) between the contacts.
ACCESSIBILITY TO COMPONENTS
The removable top slides on two rails provided with a safety
device with double protection, in order to avoid that the user slides off the
top.
Extract the removable top. [Use a screwdriver]
Operate on both guides.
Inside each rail there is the safety device. The arrow indicates
the lever to block the device.
Only one rail is considered hereafter, but the operations are the
same for both.
Release the first safety catch.
Move the lever with a screwdriver as indicated by the arrow and simultaneously
extract the top (a little).
Repeat the same operation for the other rail. When the le Release
the second safety catch
Repeat the same operations carried out at step 1, so the top will slide more.
Follow the same procedure for the other rail.
At this point the safety catches have been released and it is possible to remove the top from the rails completely.
Repeat the same operations carried out at step 1, so the top will slide more.
Follow the same procedure for the other rail.
At this point the safety catches have been released and it is possible to remove the top from the rails completely.
Fixed top
Proceed carefully in order to avoid breaking or cracking the material which the frame is made of
Proceed carefully in order to avoid breaking or cracking the material which the frame is made of
The 3 left hooks are symmetrical to the right ones.
Insert the screwdriver into area 1 and slightly bending, lift the frame upwards.
Insert the screwdriver into area 2 and slightly bending, lift the frame upwards.
Insert the screwdriver into area 3 and slightly bending, lift the frame upwards.
Insert the screwdriver into
area 4 and slightly bending,
lift the frame upwards.
Insert the screwdriver into area 5 and slightly bending, lift the frame upwards.
Insert the screwdriver into area 6 and slightly bending, lift the frame upwards.
Lift the frame up, paying attention not
to damage the flat cable connected to the display board.
WIRING DIAGRAM
CLICK ON THE PICTURES TO ZOOM IN
Reassembling the frame and removable top,
Heater, Fan, Thermostats, Power board & Display board
After the intervention, position the upper frame parallel to the
base as represented in figure, paying attention that the joints in the front
part are perfectly aligned.
Push downwards the upper frame till the “clack” of each hook that enters
its seat is heard.
Insert the removable top guides into those of the base.
Push the removable top inside the drying top. Extract it again and check that the slipping
is regular and it stops when it reaches the limit stop.
Lift the top.
Pay attention not to damage the wiring of the display board
Extract the wiring from the hook.
Place the top on the right side of the top.
Rotate the top and position it on the removable top, putting some
protections to avoid scratching the varnished parts.
Heater
After removing the fixed top, remove the wiring.
Remove the three screws which secure the conveyor.
Move it inside the drying top.
Lift the front part of the conveyor.
Lift and rotate outwards.
Detach the connectors and the ground wire.
Remove the screws which fit the heater to the conveyor and remove
it.
While reassembling, repeat the same operations in opposite order.
Fan
After removing: The fixed top & The heater
Detach the connectors of the stator and the ground wire.
Remove the screw which fits it at the bottom (note the position of
the catch on the fan).
Move the fan following the direction of the arrow (see the
movement of the fan compared to the catch).
Lift the fan from the motor part and remove it (see the arrow
direction).
While reassembling repeat the same operations in opposite order.
Thermostats & NTC
The intervention to the thermostats can be divided in two operations:
The intervention to the thermostats can be divided in two operations:
For the replacement it is necessary to carry out the two phases
below described.
If it is necessary only to push the button to activate them again, see the second phase.
If it is necessary only to push the button to activate them again, see the second phase.
First phase: inside the drying top
After removing:
The fixed top
The heater
Remove the four screws which secure the lower display.
After removing:
The fixed top
The heater
Remove the four screws which secure the lower display.
To replace the thermostat, unscrew the relative screws which secure
it to the bottom.
Second phase: inside the drying top
To remove the top, unscrew the two screws which secure it to the washing machine and push the top towards the rear part, as a normal work top.
To remove the top, unscrew the two screws which secure it to the washing machine and push the top towards the rear part, as a normal work top.
Lift the top, so it is possible to remove the connectors from the thermostat.
NTC
To remove the top, unscrew the two screws which secure it to the washing machine and push it towards the rear part, as a normal work top.
To remove the top, unscrew the two screws which secure it to the washing machine and push it towards the rear part, as a normal work top.
Lift the top, so it is possible to unscrew the screws which secure
it to the bottom and extract the connectors from the terminals.
Power board
The power board is inserted in a casing fixed with screws to the
external part of the bottom.
Remove the two screws which secure the top to the washing machine, push it towards the rear part.
Remove the two screws which secure the top to the washing machine, push it towards the rear part.
Lift the top, so it is possible to remove the connector which powers
the top and to slide off the dra in hose.
Remove the two screws which secure the cover.
[Before operating on the
electronic board, discharge yourself from the electrostatic electricity, so as
not to damage the electronic components.]
Release the two hooks which secure the board to the casing.
Remove it.
Remove it.
Rotate it on itself.
Position it as in figure
While removing the connectors from the wiring pay attention:
To the connector of the flat cable of the display board, for its dimensions.
For the connector of the NTC sensor, push the lever which secures it to the board.
While removing the connectors from the wiring pay attention:
To the connector of the flat cable of the display board, for its dimensions.
For the connector of the NTC sensor, push the lever which secures it to the board.
Display board
Remove the wiring from the power board and extract it.
Remove the hooks which secure it to the
frame, paying attention not to break them.
Remove the hooks which secure it to the
frame, paying attention not to break them.
