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Electrolux ENV06 Service Manual

Condenser dryer with heat pump
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© Electrolux Home Products Italy S.p.A.
Corso Lino Zanussi, 30
I - 33080 Porcia – PN -
Fax: + 39 0434 394096
SOI
Edition: 03-2008 Rev 0.0
Publication
number
599 70 66 79
EN
SERVICE MANUAL
TUMBLE DRYERS
Condenser dryer
with heat pump
ENV06 AEG HP
Versions
with and without LCD

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  Summary of Contents for Electrolux ENV06

  • Page 1 SERVICE MANUAL TUMBLE DRYERS Condenser dryer © Electrolux Home Products Italy S.p.A. Publication with heat pump number Corso Lino Zanussi, 30 ENV06 AEG HP I - 33080 Porcia – PN - 599 70 66 79 Versions Fax: + 39 0434 394096 with and without LCD Edition: 03-2008 Rev 0.0...
  • Page 2 2008-03 ADL 1/58 599 70 66 79...
  • Page 3: Table Of Contents

    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 ..........................
  • Page 4 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 ...................
  • Page 5: Introduction

    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).
  • Page 6: Technical Characteristics

    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...
  • Page 7: Control Panel

    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.
  • Page 8: Keys

    3.3 Keys 1. Configurable key 2. Configurable key 3. Configurable key 4. Configurable key 5. Configurable key 6. START / PAUSE key 7. DELAYED START key 8. LCD 9. Programme selector 2008-03 ADL 7/58 599 70 66 79...
  • Page 9: Symbols On Models With Lcd

    3.4 Symbols on models with LCD Cycle option symbols Delicate Long anti-crease cycle Sensitive Spin speed Final humidity Cycle symbols Iron-ready Cupboard dry Light drying Strong drying Extra-strong drying Drying phase Cooling phase Anti-crease phase Alarms Empty condensation canister Clean filters Clean heat exchanger Child safety function Buzzer...
  • Page 10: Child Safety Function

    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.
  • Page 11: Delayed-Start Key - Models With Lcd

    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.
  • Page 12: Disactivate Buzzer

    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.
  • Page 13: Adjusting The Level Of Conductivity

    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).
  • Page 14: Display

    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.
  • Page 15: Warning Leds And Symbols

    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.
  • Page 16: Operation Of The Appliance

    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.
  • Page 17: Operation In Delayed Start Mode

    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.
  • Page 18: Structural Characteristics

    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.
  • Page 19 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...
  • Page 20: Structural Components

    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...
  • Page 21: Drum

    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.
  • Page 22: Hydraulic Circuit

    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.
  • Page 23: Electrical Components

    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.
  • Page 24: Electronic Control System Memory: General Structure

    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.
  • Page 25: Conductimetric Sensor

    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).
  • Page 26: Compressor

    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...
  • Page 27: Fan Cooling Compressor

    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.
  • Page 28: Canister Fill Pump

    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...
  • Page 29: Ntc Sensor

    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.
  • Page 30: Circuit Diagram

    7 Circuit diagram 2008-03 ADL 29/58 599 70 66 79...
  • Page 31: Diagnostics System

    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.
  • Page 32: Exiting The Diagnostics System

    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). •...
  • Page 33: Selector Positions For Diagnostics (Conductimetric Appliances)

    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.
  • Page 34 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.
  • Page 35: Alarms

    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.
  • Page 36: Displaying Other Alarms

    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.
  • Page 37: Table Of Alarms

    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...
  • Page 38 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.
  • Page 39 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;...
  • Page 40: The Diagnostics Cycle Does Not Start

    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...
  • Page 41: Some Of The Leds On The Display Board Light

    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...
  • Page 42: Access To Components

    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.
  • Page 43: Evaporator Fluff Filter

    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...
  • Page 44: Compressor For Fan Motor

    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.
  • Page 45: Door Lock Latch - Door Microswitch Latch

    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.
  • Page 46: Work Top

    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.
  • Page 47: Main Circuit Board

    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.
  • Page 48: Side Panels

    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.
  • Page 49: Condensation Pump / Float-Actioned Switch

    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).
  • Page 50: Drum Rotation Motor

    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°...
  • Page 51: Drum Brush

    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.
  • Page 52: Rear Air Duct

    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).
  • Page 53: Dismantling The Chassis For Servicing

    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. •...
  • Page 54: Air Duct

    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.
  • Page 55: Checking The Efficiency Of The Heat Pump

    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...
  • Page 56 DELICATE FABRICS EXTRA 2008-03 ADL 55/58 599 70 66 79...
  • Page 57 EXTRA 5 Kg - 3 litres WATER 2008-03 ADL 56/58 599 70 66 79...
  • Page 58: Servicing The Heat Pump Circuit

    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).
  • Page 59: Door Reversibility

    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).