TABLE OF CONTENTS Introduction..............................4 Purpose of this manual......................... 4 Caution ..............................4 Installation............................. 4 Technical characteristics ..........................5 Technical data ............................5 Circuit boards............................5 Control panel .............................. 6 Stylings ..............................6 Programme selector ..........................6 Keys..............................7 Symbols on models with LCD....................... 8 Child safety function ..........................
Access to diagnostics ......................... 30 Exiting the diagnostics system ......................31 Selector positions for diagnostics (conductimetric appliances)............32 Alarms ..............................34 Displaying the last alarm to the user ....................34 Displaying alarms during normal operation ..................34 Reading the alarms..........................34 9.3.1 Displaying the alarms: models with LCD ...................
1 Introduction 1.1 Purpose of this manual The purpose of this Service Manual is to provide service engineers who already have basic experience in repairing clothes dryers with additional technical information concerning condenser dryers with electronic control systems. The electronic control system consists of a main circuit board with a built-in selector and - on some models - a liquid-crystal display (LCD).
2 Technical characteristics 2.1 Technical data height: 85 cm width: 60 cm Dimensions depth: 58 cm volts: 220-240 Voltage 50/60 varies depending on the model Number of keys varies depending on the model Number of LEDs small LCD on TC2 models Type of display panel large LCD on TC3 models built-in buzzer on circuit board...
3 Control panel 3.1 Stylings Large display Small display With information on display Small display Without information on display Without display 3.2 Programme selector Models without LDC (TC4) are fitted with 11-position programme selectors. On models with small LCD (TC3), the selector has 15 positions.
3.5 Child safety function For all models: To enable the child safety function, press keys 3 and 4 simultaneously and hold them down for 5 seconds. All the keys will be disabled and no further modifications can be entered. To deactivate this function, press the same keys again for 5 seconds.
3.8 DELAYED-START key – models with LCD Press this key during the programme selection phase (set-up) to select the DELAYED START function. On models with LCD, the delayed-start time varies up to a maximum of 20 hours. The time is shown on the display.
3.9.1 Deactivate buzzer The buzzer may be deactivated while the dryer is in programme selection (set-up) mode. Press this key to enable the buzzer. The corresponding LED or symbol will light to indicate that the buzzer is on. To disable this option, press the same key again. The buzzer will continue to sound in the event of an alarm even if the normal buzzer function has been disabled.
3.11 Adjusting the level of conductivity The so-called "conductivity" of the water used to wash the fabrics varies in different areas. The conductivity sensor is calibrated for a standard value, and any significant variations in the level of conductivity may affect the final drying result (fabrics too dry or too damp).
3.11.2 Display Display / LED Level of conductivity Approximate value (µS/ DISPLAY < 300 DISPLAY AVERAGE 300 – 600 DISPLAY HIGH > 600 The appliance is generally factory-set to the average level, though certain models may be configured differently. Check with your local Water Board office to determine the level of conductivity of the mains supply in your area.
3.12 Warning LEDs and symbols L1 or Clean heat exchanger: Lights after 80 drying cycles. To reset the cycle counter (for this function), open the access panel while the dryer is switched on, remove and clean the heat exchanger. Replace the heat exchanger and close the access panel.
4 Operation of the appliance When the selector switch is turned from OFF to one of the drying programmes, the symbols or LEDs corresponding to the drying phases light and the START/PAUSE LED begins to flash. During this phase, the various options can be entered (the corresponding symbol(s) will light). The display shows the maximum time for the drying cycle.
4.3 Operation in DELAYED START mode After selecting the drying programme, press this key to access the delayed start option. The delay time increases each time the key is pressed. To cancel (reset) this option, either turn the programme selector by one position or press the DELAYED START key until the time displayed returns to zero.
5 Structural characteristics 5.1 Heat pump in drying circuit: operating principles The cycle performed by the heat pump in a dryer consists of evaporation, compression, condensation and expansion of the liquid coolant (R134a). The circuit contains 270g of coolant. The coolant is stored in the vaporizer (4) initially in liquid form. The temperature of the air entering from the drum (14) is higher than the boiling point of the coolant.
1. Drying air (dry) 2. Fan for air circulation 3. Condenser 4. Vaporizer 5. Fluff filter 6. Humid air 7. Capillary tube 8. Cold, dry air 9. Compressor 10. Compressor cooling fan 11. Drum rotation motor 12. Condensation pump 13. Collector tray for water 2008-03 ADL 18/58 599 70 66 79...
5.2 Structural components Work top Cross-member Control panel support Side panels Control panel Canister in upper section Fluff filter Canister support Fluff filter support Duct Door seal Front panel Internal door surround Base External door surround Fluff filter Rear panel protective cover Filter compartment door Rear panel cover Plinth...
5.3 Drum The drum consists of a front flange (1), a rear flange (3), a drum band (2) and three lifters (4) which move the washing when the drum rotates. In models fitted with conductivity sensors, a central contact band (5) is fitted between the two flanges. Together with the lifters, this band comprises the humidity control system.
5.5 Hydraulic circuit Water overflow drain tube (transparent) Water fill hose to canister (red) Pump The condensation water coming from the sump is ducted to the canister by the pump (3) (immersed in the sump) through the red tube (2). When the canister is full, the overflow is ducted through the transparent tube (1) back to the sump.
6 Electrical components 6.1 Electronic control system The electronic control system comprises a main circuit board, which is inserted inside a plastic housing and fitted behind the control panel support. On models with LCD, this housing also contains the display board. 1.
6.1.2 Electronic control system memory: general structure The main circuit board is fitted with an EEPROM memory (external to the microprocessor) which stores configuration data, the description of the cycle, the status of the dryer in the event of a power failure, and any alarms.
6.2 Conductimetric sensor electronic control system utilizes conductimetric sensor, which consists electronic circuit (internal to the main circuit board) and a section external to the board comprising wiring and two brushes for contact with the lifters and the drum. The resistance is measured between the drum (1) and the lifters (2).
6.4 Compressor The compressor serves to circulate the liquid coolant (R134a). Absorbed power 550 W Resistance of primary winding 3.6 Ohm Resistance of secondary winding 7.0 Ohm Total weight 14 kg Oil load: 320 cm ISO VG 22 ESTER Compressor Run capacitor Motor overload cut-out 6.5 PTC motor protector...
6.7 Fan cooling compressor Axial fan mounted on ball bearings. Power absorption 23 W 2600 / 3000 rpm 6.8 Drum motor The drum motor assembly consists of a belt tensioner and a 110W single-phase asynchronous motor fitted with an overload cut-out. The power to the motor is provided by the main circuit board via a relay (which determines the direction of rotation) and a TRIAC.
6.10 Canister fill pump This pump is actioned by a synchronous motor with a power of about 17W. Its function is to pump the condensation water to the canister. The pump is powered via a TRIAC. Resistance measured across the ends of the coil: 750Ω...
6.13 NTC sensor The NTC sensor is located at the outlet of the capacitor and comprises a resistor, fitted inside a metal capsule, whose resistance decreases as the temperature increases. The electronic circuit reads the resistance and actions the compressor cooling fan so that the temperature of the liquid coolant at the capacitor outlet remains constant.
8 Diagnostics system Diagnostics mode can be used to check the operation of the appliance and read any alarms. 8.1 Access to diagnostics 1. The appliance must be switched OFF. 2. Switch on the appliance by turning the programme selector one position in a clockwise direction. 3.
IMPORTANT! • The alarms remain enabled during diagnostics tests on the components. If an alarm condition is displayed, move the programme selector to the first position in order to exit the alarm condition and continue with the test (if the alarm is not repeated). •...
8.3 Selector positions for diagnostics (conductimetric appliances) Models with LCD: When the service engineer accesses the various functions in diagnostics mode, a code is shown in the bottom right-hand corner of the display (e.g. C5 - C5 etc.). These are simply codes relative to the programme selector, and have no ATTENZIONE effect on the tests to be performed.
Operating Position of selector Components actioned Function checked condition Conductimetric sensor. Duration of check 4 sec. during which the LED flashes. Control of If at the end of the test the result is correct, Door closed conductimetric sensor the LED switches off; otherwise the LED with the circuit open flashes continuously.
9 Alarms 9.1 Displaying the last alarm to the user Control of the alarms is configurable. Therefore, depending on the model, some or all alarms can be displayed to the user. Normally, all alarms except E61, E97 and EB2 are displayed to the user. When an alarm condition occurs, the drying cycle may be stopped or paused.
9.3.3 Displaying other alarms Press the START key to display all the other alarm conditions detected by the appliance. The alarms are displayed in sequence. 9.3.4 Cancelling the last alarm It is good practise to cancel all the alarm conditions stored in memory: after reading the alarm, in order to check whether it re-occurs during the diagnostics routine.
9.4 Table of alarms Reset Alarm Description Possible fault Remedy / Machine status command No alarm Canister fill pump TRIAC faulty Faulty wiring; Main circuit board faulty Cycle stopped "Sensing” circuit of canister fill pump TRIAC faulty Main circuit board faulty Cycle stopped Frequency of signal from conductimetric sensor too Main circuit board faulty...
Heating unit faulty; Faulty wiring; NTC sensor Insufficient heating (maximum time exceeded) incorrectly calibrated/seated; Main circuit board Cycle paused Start faulty Heating unit faulty; Faulty wiring; Main circuit Power relay for heating unit faulty Forced cooling cycle board faulty Disconnect the heating unit from the power supply.
Cycle stopped; if the correct power supply is Power supply problem (incorrect/interference); Power frequency not within limits restored before the time-out has elapsed, the Main circuit board faulty. cycle resumes Power supply problem (incorrect/interference); Voltage too high Cycle stopped Main circuit board faulty. Cycle stopped;...
10 The diagnostics cycle does not start 10.1 None of the LEDs on the display board lights Is the power cable OK Replace or repair the power cable and and correctly connected? perform the diagnostics cycle Does the suppressor built into the terminal block Replace the terminal block/suppressor function correctly? assembly and perform the diagnostics cycle...
Some of the LEDs on the display board light Do the keys move freely and do they correctly Eliminate the mechanical problems action the buttons? (control panel / keys / supports / spindle) When the keys are pressed, are the cycle options Replace the main circuit board and perform correctly entered? the diagnostics cycle...
11 Access to components 11.1 Door To remove the door, remove the screws which secure it to the front panel 11.2 Fluff filter 11.2.1 Fluff filter on door Press the tab on the filter support and push upwards to remove. The filter should be cleaned after every cycle.
11.2.3 Evaporator fluff filter To open the compartment, press the tab and pull the evaporator fluff filter support outwards. Press the two locking tabs at the sides of the filter support and lift the filter out. 11.2.4 Fluff filter for water from evaporator An additional filter, positioned beneath the fluff filter support, serves...
11.3 Compressor for fan motor The compressor cooling motor is located in the front section, behind the right-hand section of the plinth. Remove the two screws, move the cover slightly to the left and remove the plinth. Move the two motor retaining clips upwards and tilt the motor slightly downwards.
11.6 Door lock latch - Door microswitch latch To remove the door lock latch and the microswitch latch, use a screwdriver to press the anchor tabs and turn in the direction indicated by the arrows. 11.7 Drum light bulb The bulb can be replaced from inside the drum. Unscrew the lamp cover and replace the bulb with one having the same characteristics.
11.9 Work top To remove the work top, first remove the two screws which secure it to the rear section of the dryer. Then push towards the rear of the appliance and remove. 11.10 Control panel/support assembly Remove the canister and remove the screws which secure the control panel to the canister casing.
11.11 Main circuit board 11.11.1 Removing the board After removing the entire control panel assembly, detach all the wiring (remember to note the positions of each connector to facilitate re-connection). Remove the main circuit board by removing the 8 screws which secure it to the control panel. Use a screwdriver to lever open the anchor tabs (do not use excessive pressure) and remove the board.
11.12 Side panels First remove the screws which secure the side panels to the rear panel, then remove the screws which secure the side panels to the upper cross- members. Lift the side panels slightly and remove. 11.13 Water ducts The water ducts are accessible from the right side of the appliance.
11.14 Condensation pump / float-actioned switch The water which condenses during the drying cycle is collected in a tray (2) communicating with the float chamber (8). The pump (3) is fitted inside the cover (1), which is anchored to the base of the appliance using three screws (S).
11.15 Drum rotation motor Detach the belt tensioner spring (2). This loosens the belt tensioner pulley (3), which is attached to the motor. Turn the motor towards the interior of the dryer. This loosens the drive belt (4) which can now be removed. Loosen the screws (S) which secure the front and rear motor brackets (5), rotate 90°...
11.17 Drum brush The carbon drum brush (1) is located above the base of the appliance in a special housing. remove brush, detach electrical connector, lower the two clips (2) and pull the brush outwards. 11.18 Rear brush Remove the screws which secure the drum spindle cover. Turn the cover until the lower anchor clip is released.
11.19 Rear air duct Detach the connector from the fan (2). Remove the 18 screws which secure the air duct to the rear panel. Do NOT remove the four screws (1) which secure the fan. List the air duct slightly and remove from the rear panel. After removing the air duct assembly, remove the four screws (1) and remove the fan (6).
11.21 Dismantling the chassis for servicing • Remove the side panels. • Detach all the wiring. • Remove the belt tensioner spring and loosen the drive belt. • Remove the three screws (S) which secure the rear panel to the base. •...
11.22 Air duct Remove the drum. Remove the screws which secure the hinges and the covers to the duct. Detach the wiring as necessary. Remove the duct 11.23 Front air seal After removing the drum, the front air seal can be removed simply by pulling it out of its groove. 11.24 Idle pulleys The idle pulleys can be removed after removing the drum.
12 Checking the efficiency of the heat pump To check the efficiency of the heat pump, place the sensors in the positions indicated in the figure and compare the resulting graphs with those shown below. 1 Condenser inlet 3 Evaporator inlet 2 Condenser outlet 4 Evaporator outlet GENERAL...
12.1 Servicing the heat pump circuit 12.1.1 Replacing the compressor Disconnect the appliance from the power supply. Use the special needle valve (1) to evacuate the gas. Dispose of the R134a liquid coolant in the appropriate manner. Loosen the compressor anchor elements to facilitate access. Use a pipe-cutter to cut the intake pipe (2) and the delivery pipe (3).
13 Door reversibility Open the filter compartment door Remove the filter compartment door by removing the two screws which secure the hinges (A) to the appliance. Remove the masking plates (B) and (C) by levering off with a flat screwdriver. Remove the door lock latch (D) by pressing with a screwdriver and fit it to the other side of the door (remember to turn it upside down).