SERVICE MANUAL DRYER HEAT PUMP DRYER EDR 000 Electrolux Muggenhofer Straße 135 D-9049 Nürnberg Germany Publ.-Nr.: 599 5 797 EN HEAT PUMP DRYER EDR 000 Fax +49 (0)911 33 10 DGN-TDS-N Ausgabe: 06.005 R.Kurzke Electrolux
CONTENTS 1. Dimensions / Reversibility of the door... 3. Structure / Control components... 4.1. Control panel EDR 000... 5.1.1. Description of pushbuttons... 5.. Programme selector... 5 3. Programmes... 6 4.1. Fuction heat pump system... 7 4.. Structure... 8 5. Elektrical components... 9 5.1.1 Elektronic EDR 000... 9 5.1. Elektronik mainboard connections... 10 5. Compressor... 11 5.3 Compressor cooling fan... 11 5.4 Drum motor... 11 5.5 Canister filling pipe... 1 5.6 Prozeßlüfter/Gebläse... 1 5.7 Terminal block with incorporated suppressor... 1 5.8 NTC-sensor... 13 5.9 Conductimetric sensor... 13 5.10.1 Door switch... 14 5.10. Door lock... 14 6. Electrical circuit... 15 7. Service tips / Accessibility of components... 16 7.1. Door... 16 7. Fluff filter... 16 7.3 Fine particle filter... 16 7.4 Compressor cooling fan... 17 7.5 Door switch / Door lock... 17 7.6 Drum light... 17 7.7 Work top... 18 7.8 Control panel... 18 7.9 Elektronic module... 18 7.10 Side panels... 19 7.11 Motor area / Water channels... 19 7.1 Pump unit/floating switch... 0 7.1.1 Canister filling pump... 0 7.1. Float... 0 7.1.3 Floating microswitch... 0 7.13 Drum motor... 1 7.14 NTC-sensor... 1 7.15 Brush (conductimethc sensor)... 7.16 Rear brush... 7.17 Rear air duct with fan... 7.18 Simple disassembly of chassis and drum section... 3 7.19 Front air duct... 4 7.0 Air duct / Drum rollers... 4 7.1 Rear seal... 4 8. Heat pump base... 5 8.1 Inspection of the heat pump performance / diagnosis... 5 8. Compressor replacement / Access to the heat pump circulation... 6 8.3 Evacuating... 6 8.4 Filling... 6 9. Elektronic EDR 000... 7 9.1 DEMO-Mode... 7 9. After sales diagnostics system... 8 9.3 After sales test programme... 9 9.4.1 Error codes / Alarm codes... 30 9.4. Table of alarms 10.1 Wiring diagram 1... 3 10. Wiring diagram... 33 06.005 R.Kurzke - -
1. Dimensions / Reversibility of the door Height Width Depth 85 cm 60 cm 60 cm Depth (Door open) Height can be adjusted by Weight when empty 109 cm 1,5 cm approx. 60 kg Loading volume (depends on programme) max. 6 kg permissible ambient temperature + 5 C bis + 35 C Changing door stop - Open loading door. - Unscrew hinge A from the front of the machine and take off the loading door. - Use a thin screwdriver to pry off cover plates B and C. - Use an appropriate tool and exert pressure to unfasten locking block D from the snap-on fixture, take out and reinsert on the other side having rotated the block through 180. - Unscrew hinge A from the loading door, rotate through 180, reinsert on the opposite side and screw down. - Reinsert cover plates B and C on the opposite site having first rotated them through 180. - Unscrew cover plates E from the front ofthe machine, rotate through 180, screw on the opposite side. - Unscrew door lock F, push down slightly and remove from the front of the machine. - Disconnect cable connector from door lock F. - Press snap-in button G in and down, press cover down slightly and remove from front ofthe machine. - Disconnect cable connector from cover G. - Change door lock F over to the opposite side, insert the cable connector and screw down the door interlock. - 0n the other side, insert the cable connector in cover G insert cover - Insert loading door and hinges into recesses on the front ofthe machine and screw down. - Once the door stop has been replaced, check the function of the DOOR button. Note regarding contact protection: - The machine is only secure for operations again once all plastic parts have been inserted. 06.005 R.Kurzke - 3 -
. Structure / Control components Base door to fine particle filter Remaining moisture 06.005 R.Kurzke - 4 -
.1 Control panel EDR 000.1.1 Description of pushbuttons and LEDs The control panel, together with the push buttons, features 10 or 13 LEDs, a programme selector and a display with 3 digits. The options can be selected only after setting a drying cycle with the selector. The functions of the pushbuttons and the LEDs depend on the configuration code of the appliance. Time select button A delayed start time of from 1 1 hours can be set by pressing this button during the programme selection phase. The time is shown on the display. The length of the delay is increased by repeatedly pressing the button. For the first two hours, the length of the delay is increased in steps of half an hour each time the button is pressed. After the first two hours, each press of the button increases the length of the delay by an hour. Remaining moisture button For fine adjustment of the remaining moisture content of the washing. Changing the setting from + to +++ makes the washing progressively dryer. Press the RESTFEUCHTE button repeatedly until the lamp above the desired remaining moisture level is lit. When the degree of moisture is changed, the time shown on the display also changes. "START/PAUSE" pushbutton Start When a drying programme has been selected using the programme selector, the LEDs for the three phases (drying, cooling and - if featured - anti-crease/end of cycle) light and the START/PAUSE LED flashes. After selecting the desired option(s), press this bufton to start the cycle. The corresponding LED, as well as the drying phase LED, remains lit. Pause lf START/PAUSE is pressed while a drying cycle is being performed, the dryer interrupts the cycle and the appliance goes to PAUSE mode; the corresponding LED flashes. Certain options may be modified while the appliance is in PAUSE mode. Press START/PAUSE again to resume the cycle from the point at which it was interrupted. "NO BUZZER" pushbutton This option can be selected only when the dryer is in "selection" mode (set-up). Press this button to deactivate the buzzer function. The LED lights to indicate this selection. To re- activate the buzzer function, press the button again; the LED will switch off. Even when the buzzer function is deactivated, the buzzer will continue to signal alarm conditions. Anti-crinkle+ button When this additional function is selected, the anti-crinkle phase after completion of the drying sequence is lengthened by 60 minutes. The washing can be removed at any time during the anti-crinkle phase. Wool and silk buttons If the textiles are still too damp after the drying sequence with the Wool or Silk programmes, an additional drying sequence with the Wool or Silk programme can be added by additionally setting the remaining moisture level +, ++, or +++. Important: do not overdry wool or silk!. Programme selector The 16-position programme selector (with incorporated ON/OFF switch) is built into the board. The first nine positions are common to all versions (i.e. always select the same programmes); programmes 10 to 14 vary according to the configuration of the appliance. 06.005 R.Kurzke - 5 -
3. Overview of Programmes PROGRAMME loading volume Crease guard Acoustic signal Resisual dampness Application/Properties EXTRA DRY 6kg x x x Drying thick or multi-layered textiles, e.g. terry towelling items, bathing costumes INTENSIVE DRY 6kg x x x Drying thick textiles, e.g. terry towelling items, towels. STORAGE DRY 6kg x x x Drying textiles of even thicknesses, e.g. terry towelling items, knitted items, towels COTTONS DAMP 6kg x x x For thin textiles which are still to be ironed, e.g. knitted items, cotton shirts. HAND IRON 6kg x x x For normal thickness cotton or linen laundry, e.g. bedding, table linen. MACHINE DRY 6kg x x x For cotton or linen laundry which are still to be put through a machine, e.g. bedding, table linen EXTRA DRY 3kg x x x Drying thick or multi-layered textiles, e.g. pullovers, bedding, table linen. EASY CARES STORAGE DRY 3kg x x x For thin textiles which are not ironed, e.g. easy care shirts, table linen, baby clothes, socks, corsetry. DAMP 3kg x x x For thin textiles which are still to be ironed, e.g. knitted items, cotton shirts. 30 MIN 1kg - x x For drying individual items of laundry or for small volumes of less than 1 kg. LEISURE 6kg x x x Special programme for leisure clothing, such as jeans, sweat shirts, etc., of different material thicknesses (e.g. at the cuffs and seams). EASY IRON 1kg - x x Special programme with anti-crease mechanism for easy care textiles such shirts and blouses; for minimum ironing effort. The result depends on the typ and quality of textiles (the loading volume corresponds to approx. 5 to 7 shirts). Recommendation: Place textiles in the dryer staight after spinning. Once dried, immediately remove textiles and place on clothes hanger. WOOL CARE 1kg x - x Special programme for briefly treating woollens with warm air after they have been dried naturally, worn or stored for long periods. Wool fibres are aligned and the wool becomes soft and snugly. Recommendation: Remove textiles immediately after drying. SILK 1kg x x x Special programme for drying silk using warm air and gentle movement. REFRESH 1kg - x x Special programme, lasting around 35 minutes, for refreshing or gently cleaning textiles with commercial available dry cleaning sets. 06.005 R.Kurzke - 6 -
4.1 The principle of operation of the heat pump in the drier circuit The circuit of the heat pump of the clothes dryer comprises evaporation, compression, condensation, and expansion of the cooling agent R134a (filling quantity 60g). This is initially situated in the evaporator (3) in the liquid phase, with the temperature of the moist air exiting from the drum (1) being higher than the boiling point of the cooling agent. This causes heat to be transferred from the heat source to the cooling agent, which in turn causes this to receive sufficient energy to evaporate. This cooling causes the moisture held in the air to condense and to run into the collection dish (7) to be pumped off into the condensed water tank (9). The compressor () continuously sucks in the cooling agent vapour, which is compressed by a multiple and at the same time heated. The compressor discharges the heat in the liquefier (4). This in turn heats the air sucked in by the fan (6) and the now dry air which is readmitted through the drum and takes up moisture. The cooling agent becomes liquid again and discharges sufficient pressure and temperature through the capillary tube (5) such that heat can again be taken up in the evaporator (3) from the moist air coming from the drum (1). This sequence is now repeated continuously in a closed circuit. If there is water condensation in the collection dish (7), the microswitch triggers, activating the condensate pump (8), which leads the water to the container (9). When this becomes full, the overflowing water is taken up by the tank of the container and led back into the collection dish (7) through a hose (not shown in the diagram). This causes the floater to rise and to reactivate the microswitch. The electronic controi system detects the closure of the microswitch, cuts off the power to the appliance and switches on a LED warning the user that the canister is full. The tank capacity is about 4 lt., which is sufficient for one drying cycle 1 9 5 6 3 4 1 Drum Compressor 3 Evaporator 4 Liquefier 5 Capillary tube 6 Fan 7 7 Collection chamber and floating switch 8 Condensate pump 9 Container 8 06.005 R.Kurzke - 7 -
4. Structure Drying air Fine particle filter Liquefier Evaporator Fan 6 drum motor hot dry air 4 1 Base cpl. Compressor 5 cold dry air 8 7 3 Evaporator 3 4 Liquefier hot moist air 5 Capillary tube 6 Fan 6 7 8 7 Collection chamber and floating switch 8 Condensate pump 5 4 3 1-8 - 06.005 R.Kurzke
5. Electrical Components 5.1.1 Elektronic EDR 000 The electronic module controls all of the appliance's functions. All of the control elements for the electrical function components are to be found on this module. The electronic system is responsible for executing the running of the various programs and options. This is carried out in connection with the evaluation of various input signals (temperature, residual moisture, etc.). This electronic system is specially configured ex works for each dryer model via the PNC. It is imperative that the corresponding spare parts numbers with the specific electronic data are taken from the spare parts list for the corresponding model. A key set on an light conductor unit serves as an optical and mechanical interface with the operator. The movements of the keys are momentarily transmitted to the keys which are mounted on the electronic PCB. Corresponding LEDs transmit light signals to the surface of the control panel by means of the light conductor. An additional display is mounted on the EDR 000 in the form of an additional display PCB wit LEDs and a 7-segment light conductor head room are mounted on the light conductor unit. Light conductor unit with touch plungers Display PCB 7-segment light conductor Push buttons Key set (positioning) It is possible that the keyboard layout can differ depending on the equipping of the appliance. The key set is completely supplied with the keys as a spare part. However, should it be the case that the keys are to be individually configured, care is to be taken with regard to the correct positions of the individual keys. Due to the convex covers, these are adapted and cannot be exchanged for each other. The key caps have a number inside them (refer to the illustration), which serves the correct positioning. The position schema is the same for all key sets (refer to the example below). Position number 06.005 R.Kurzke - 9 -
5.1. Main board Flash program to display PCB Funktion key Configuriation interface Micro switch/float (5V) Micro switch/float NTC (5V) NTC Buzzer Motor Moisture sensor Drum brush Motor Pump Compr. cooling fan Motor Pump Fan motor Compr. cooling fan Drum light Drum light Compressor motor Fan motor Motors 0 Door switch Door switch Rotary selection switch 30 V Power supply 06.005 R.Kurzke - 10 -
5. Compressor The compressor drives the cooling agent (R134a) circulation of the heat pump. Power consumption Widerstand main coil Widerstand auxiliary coil 550 Watt. 3,6 Ohm 7,0 Ohm Kompressor Überlastungsschutz Total weight 14 kg Oil filling 30 ccm Öil ISO VG ESTER Netz Compressor motor condenser 16 uf/400v Motorkondensator 5.3 Compressor cooling fan Axial fan fitted with ball bearings, power consumption 3 watts, 600 3000 rpm 5.4 Drum motor Drum motor The motor assembly consists of a belt tensioner and the single-phase asynchronous motor (3), with anti-overheating circuit breaker. The efficiency of the motor can be checked by measuring the resistance across the windings: Winding A Ohm 9 ~ (contacts 1-3) Winding B Ohm 9 ~ (contacts -3) The motor is powered by the electronic board via a relay (which determines the direction of rotation) and a triac. The motor condenser (9uF) is mounted on the cover of the condensate pump and the floater chamber. 06.005 R.Kurzke - 11 -
5.5 Canister filling pump The pump is actioned by a synchronous motor with a power of about 17W. The function of the motor is to pump the condensation water from the sump to the canister. The pump, too, is powered by a triac. The resistance of the stator winding is approximately 750 Ohm 5.6 Process blower / fan The fan for transporting the air is screwed in in the rear air channel. The fan motor is also fed through a triac. Power consumption 150 W 450 rpm Fan motor condenser 5µF 5.7 Terminal block with incorporated suppressor The suppressor, which is incorporated in the terminal block, prevents radio dicturbance generated by the dryer from entering the power lines. This device functions correctly only if the appliance is grounded. Checking for efficiency: Use a tester to measure the resistance across the following terminals: 06.005 R.Kurzke - 1 -
5.8 NTC sensor The NTC sensor is fitted to the hot air fan duct. This sensor consists of a resistor contained in a metallic capsule. Its resistance decreases as the temperature increases. The electronic circuit reads the resistance (which varies with the temperature inside the dryer); when this resistance falls below a certain value, the heater unit is switched off. As the air cools, the resistance increases; when it reaches a given value, the electronic circuit re-connects the heater unit to the power supply. This occurs each time the temperature inside the dryer exceeds a given value, which varies according to the drying cycle that has been selected. 1 - NTC resistor - Metallic capsule 3 - Terminals 4 - Plastic casing 5.9 Conductivity sensor The conductivity sensor used in these appliances comprises an electronic circuit (within the main electronic system) and an arrangement which detects the level of washing moisture. The impedancy value is measured from the drum (1) itself to the insulated drum ribs (). This impedance value is influenced by the amount of washing in the drawing, the type of textile and the moisture level. The brush (3) has contact with the drum ribs. Via an insulated abrasive belt (4) on the drum, it makes contact with the drum which passes through the drum panel and which has contact with the drum ribs by means of clamps (5). The carbon brush (6) which makes contact with the drum shaft is situated in the protective housing (7) of the drum shaft. This sensor is connected to the electronic circuit via the appliance housing, this representing the earth of the electronic appliance circuit. The empty drum is subjected to an infinite impedance to the insulated drum ribs. This changes if moist washing between the drum and the drum ribs offers a measurable impedance. The impedance value amounts to approximately 1 M - 5M and is converted in an oscillation of between ~ 60Hz - OHz, these being read and evaluated by the electronic circuit (Fuzzy Logic), this determining the duration and ultimate level of the washing moisture in accordance with the selected program. 7 5 5 6 The new carbon brush, separately (left) and installed (right). 4 1 3 06.005 R.Kurzke - 13 -
5.10.1 Door switch The door switch feeds the electronic function components after the door has been closed and the program selector rotated (ON/OFF closed). It is positioned above the door opening and is closed by means of a plunger when the door is closed. Door switch (Micro switch) Tappet 5.10. Door lock The door closure of the heat pump drier is purely mechanical. The door locking system is fitted with a childproof lock. In case of emergency, the door can be pushed open from the inside Rastblech 06.005 R.Kurzke - 14 -
6. Electrical operation The circuit diagram shows all the components of the dryer and their connections to the electronic board. The voltage in the pushbutton circuits, the etectronic board, the conductimetric sensor and the NTC sensor is about 5V. When the programme selector knob is turned, the two-pole switch (8) powers the electronic board. When the door is opened, the drum light (3) (if featured) lights. To start the cycle, the door microswitch () must be closed. When START/PAUSE is pressed, the cycle starts and the various loads are powered. The motor is powered via a TRIAC (TYI) which is piloted by the microprocessor. Reversal of the direction of rotation (to unroll the washing in the drum) is controlled by a relay (RL3). For dryers with the canister in the upper section, the pump (10) is powered by a TRIAC (TY). When the canister and the sump are filled with water, the float moves upwards, opening the contacts of the microswitch (9). This causes the microprocessor to interrupt the drying cycle and to warn the user by sounding the buzzer and lighting the CANISTER FULL pilot light. The NTC sensor (11) measures the temperature of the air inside the appliance, while the conductimetric sensor (1) determines the degree of humidity of the fabrics. The microprocessor constantly monitors the correct operation of the components via a number of "sensing" lines: if a fault occurs, the appliance goes to ALARM mode. The DISPLAY, fitted to the control/display board (13) shows the maximum drying time, the alarms and the DELAYED START time. The microprocessor constantly monitors the correct operation of the components via a number of "sensing' lines.- if a fault occurs, the appliance goes to ALARM mode. 1. Suppressor. Microswitch doorlock 3. Drumm light 4. Compressor motor 4.1. Condenser compressor 5. Drum motor 5.1. Condenser drum motor 6. Fan motor 6.1. Condenser fan motor 7. Compressor cooling fan 8. Main switch 9. Floater micro switch 10. Canister filling pump 11. NTC 1. Brush (conductimethc sensor) 13. Display electronic module 14. Main electronic module 06.005 R.Kurzke - 15 -
7. Service tips / Accessibility of components 7.1 Door To remove the door, loosen the screws with which the door is mounted on the hinges. 7. Fluff filter fitted inside door Remove it by pulling it upwards and clean it at the end of each program. Fluff filter inside the frame The filter cannot be replaced by the end user and is only intended for customer service for replacement. When the old filter is removed, it may become damaged. 7.3 Fine particle filter slot The fine particle filter in front of the evaporator/liquefier unit can be removed using the handle after the slot door is opened. The filter insert can be withdrawn upwards. A further filter below the fine particle filter drawer serves to prevent fluff which gathers in the slot or in the collection dish during the drying sequence from entering the condensed water. 06.005 R.Kurzke - 16 -
7.4 Compressor fan motor After unscrewing the attachment screw, the right slot cover can be released to the left. The cooling fan is held in two clips and can be easily disengaged. The electrical connection is plugged in next to this, to the right. 7.5 Door switch Remove the screw, release the switch and remove it by pulling it forwards. Door lock Remove the screw, release the door lock and remove it by pulling it forwards. Locking nose and door plunger Remove by disengaging and releasing it. 7.6 Drum light The bulb can be replaced from inside the drum as follows: - Remove the cover by screwing. - Unscrew the bulb from the bulb-holder. - When replacing the cover, ensure that the sealing n'ng i's correctly positioned in its seat. N.B. Use anly bulbs supplied as original spare parts (the code is shown in the parts list for each modet). 06.005 R.Kurzke - 17 -
7.7 Work top To remove the work top, first remove the screws which secure the top to the rear edge of the appliance. Slide the top towards the rear. 7.8 Control panel Remove the container and release the screws with which the front cover is fastened to the container tank and to the cover holder. Open the door, release the front cover from the housing, and turn it forwards. Unplug the cabling of the display electronics. The light duct becomes accessible. The display module and the locking bolt can be released from the cover if required. 7.9 Main elektronic Remove the operating panel. Ensure that the program selector is set to "0" (Off). Remove the grooved pin (1) from the program selector. Press against the locking hook () of the protective housing, release the protective housing from the electronic system support. Disconnect the cable connector (3) from the electronics system. 3 1 06.005 R.Kurzke - 18 -
7.10 Side panels After unscrewing the rear attachment screws (1), the corresponding side wall can be disengaged by raising it slightly, and removed. 1 4 1 1 7.11 Motor area / water channels Access to the motor area and the water channels is from the right side. The condensed water is pumped upwards to the water receptacle () through the red hose (1). If this is full, it flows over (3) and the water is led into the float chamber via the transparent hose (4). 3 The condition is reported to the electronics system via a micro switch above the float. (See the next page). 06.005 R.Kurzke - 19 -
7.1 Pump unit / floater switch The water condensed in the drying sequence is collected in a water chamber () in the floor pan. The assembly (1) with pump (3) and floater switch (4) is screwed to this chamber. 1 The condensed water is pumped into the upper collection tank through the red hose (6). The transparent hose (7) leads overflow water from there back into the lower water chamber. Both hoses are fastened with tension clamps. Also attached in the assembly mounting are the motor condensers (C) of compressor and drum motor. The whole mounting is screwed to the floor pan with two screws. 3 C 3 C 1 5 7.1.1 Condensate pump (3) The condensate pump is clipped into the assembly mounting. The electrical connection lugs are located above. 7.1. Floater microswitch (5) The floater microswitch (5) is screwed in below the assembly mounting. When the assembly is reinstalled, care must be taken that the switch spring and the floater do not become trapped. 7 6 1 7.1.3. Floater (8) The floater is introduced into the floater chamber and activates the microswitch (5) as the condensed water rises. This signal is passed to the control circuits. S S 3 8 06.005 R.Kurzke - 0 -
1 4 3 7.13 Drum motor (1) Unhook the belt tensioner springs (). This releases the belt tension pulley (3) which is attached to the motor. Rotate the motor t face the interior of the device. The belt (4) is then free and can be removed. Release the screws (S) fastening the front and rear mounting brackets (5) of the motor, angle the brackets upwards, and remove them. The motor unit can then be accessed. The motor and its bearings can easily be removed. S 5 S 7.14 NTC (1) The NTC (1) is seated in a special receptacle on the dryer cartridge (3) between the liquefier and the evaporator in the heat pump circuit. A special spring () serves to keep the component securely seated. To replace it, the spring (see diagram) is pressed and is released downwards. The NTC can then be removed upwards. 3 1 1 1 06.005 R.Kurzke - 1 -
7.15 Carbon brush (conductivity sensor/monitor) The lower carbon brush (1) monitors the conductivity at the contact band of the drum. The carbon with holder is seated in a receptacle in the slot section. The unit can be disengaged and removed by pressing the two clips (). 1 1 7.16 Rear brush (conductirnetric sensor) Remove the screw which secures the drum spindie cover. Rotate the drum cover until it is released from the anchor in the lower section. The brush is located inside the protective cover. 7.17 Rear air channel with fan 1 After releasing all screws (1), the complete rear air channel () with fan (6) can be removed. The electrical connection runs through the corresponding connection openings (8) over a plug connector. After unscrewing the screws (7), the fan (6) can be removed. 7 The channel itself consists of the exterior covering (3), the isolation mat (4) and the inner air channel (5). 8 3 4 5 6 8 06.005 R.Kurzke - -
7.18 Simple disassembly of chassis and drum section for servicing work (Belt replacement access to the heat pump circuit) S S S S Simplest and quickest method: - remove side walls - remove the attachment screws (S) from the rear wall on the underside of the slot and on the upper strut - draw out the condensate hose - if appropriate, unplug the electrical connections. The complete rear wall, complete with drum, can now be removed. All functional parts are accessible. 06.005 R.Kurzke - 3 -
7.19 Air duct Remove the drum. Loosen the screws with which the air duct is mounted on the hinges and the hinge panels. Remove the air duct. Front air seal The front seal can be simply slided from its seat. 7.0 Duct rollers - Remove the work top - Remove the rear panel cover - Remove the rear panel - Remove the drum - Remove the screws which secure them to the duct 7.1 Rear seal The rear seal can be simply pulled away from the ring fitted to the rear panel. After replacing the rear drum seal, apply lubricant uniformly over the entire inner felt surface using 1 gr of silicone oil (part code 503 7 70-00/9). 06.005 R.Kurzke - 4 -
8. Heat pump base 8.1 Inspection of the heat pump performance / diagnosis With the temperatures determined in the measurement record (below), the heat pump will function correctly and deliver the correct power. In the event of significant variations, there may be a defect. 1 3 4 1 Liquefier input Liquefier output 3 Evaporator input 4 Evaporator output Cotton EXTRA DRY Liquefier input Liquefier output Evaporator output Evaporator input 06.005 R.Kurzke - 5 -
8. Compressor replacement Access to the heat pump circulation Unplug the power supply from the device. Tap into the heat pump circulation with the tap valve (1). 1 Drain and dispose of the cooling agent R134a in accordance with regulations. Access is easier if the compressor is removed from its mounting. Separate the suction () and pressure (3) lines with a tube cutter. The compressor can then be removed, and, if appropriate, replaced. The suction and pressure lines are now reattached to the circulation using Lokring technology. A Schrader T-valve (4) can be installed into the suction line for evacuating and filling the heat pump circuit. 3 As an alternative, it is possible to connect a separate filling tube with valve (6) to the filling pipe (5) provided on the compressor. 6 8.3 Evacuating For both economical and technical reasons, one-sided 15-minute evacuation from the suction side has become proven. The evacuation removes the maximum amount of foreign gas and moisture from the cooling circuit. The circuit is evacuated with the compressor switched off. The compressor should be shaken briefly at least once during the evacuation process so that as much as possible of the cooling agent that is still mixed into the oil is released. 8.4 Filling The cooling agent can be filled directly from the cooling agent bottle using a special balance (7). 7 4 5 The cooling agent R134a is supplied in disposable cartridges. When filling, the compressor must be switched off and the personal protective equipment must be worn. Oil filling R134a: 60g 06.005 R.Kurzke - 6 -
9. Die Elektronik EDR 000 9.1 DEMO-Mode EDR 000 This is a demonstration function that can be used by the retailer to demonstrate the Operation of the appliance to customers. When the appliance is in DEMO mode, the heating elements are not powered and the various phases are of abbreviated duration; the washing inside the drum is not controlled in any way. Selecting DEMO mode The appliance must be switched off. Switch on the appliance, by turning the Programme selector two positions clockwise. Gleichzeitig die Taste START/PAUSE und die Taste links davon (unabhängig von der Konfiguration der Elektronik) mindestens 5 Sekunden lang drücken, bis die LED über der linken Taste blinkt Select the various options. Press START/PAUSE to Start the DEMO cycle. Exiting DEMO mode To exit DEMO mode, switch off the appliance by turning the Programme selector to 0 (zero). 06.005 R.Kurzke - 7 -
9. DIAGNOSTICS SYSTEM In diagnostics mode, it is possible to check the operation of the appliance and to read the alarm codes. Access to diagnostics EDR 000 The appliance must be switched OFF. Switch the appliance ON by turning the programme selector knob one position clockwise. Wait until the LEDs light and the buzzer sounds. Wait until the LEDs light and the buzzer sounds, Then simultaneously press buttons start/pause and the button to the left of it. lmportant: this operation must be performed within 5 secands! Exiting the diagnostics system To exit the diagnostics system, turn the programme selector knob to zero to switch the appliance OFF, then switch it ON and OFF again. Phases of the diagnostics systern After accessing the diagnostics system: In the first position, the appliance tests the operation of the pushbuttons and the corresponding LEDS. -> Turn the programme selector knob clockwise to perform the diagnostics test on the various components and to read the alarm codes. IMPORTANT! The alarms remain active during component diagnostics testing. lf an alarm should be displayed, turn the programme selector to the first position to exit the alarm situation, and then continue the testing cycle (if the alarm is not repeated). In order to check for correct operation of the floating switch and the pump (models with canister in the upper section), the sump is filled with approximately 0.7 litres of water. For correct control of the conductimetric sensor in a condition of short-circuit (position 7), remove the cover and create a short-circuit between the two half-shells of the drum or between the front shell and ground. After entering this phase, the time availabie for creation of the short circuit is just one second; therefore, prepare the short circuit before turning the programme selector knob to position seven (it is advisable to do this in a position in which the drum is stationary, then pass quickly to this position). lf the short circult is not performed correctly, the electronic board will clisplay alarm E3 (sensor frequency too low). To exit the alarm condition, turn the programme selector knob to the first position. Open the condenser access panel and check that the switch operates correctly. The buzzer will emit four "bips" (in different tonalities), repeated every 7 seconds. 06.005 R.Kurzke - 8 -
9.3 After sales test programme - Compressor cooling fan - Compressor cooling fan - Compressor cooling fan - Ventilation fan - Motor - Compressor cooling fan - Ventilation fan - Compressor - Motor triac - Compressor cooling fan - Float micro switch 06.005 R.Kurzke - 9 -
9.4.1 Table of alarms Alarm Alarm Fault Possible Machine Reset Code Description Condition Fault Action/Status Cmd E1 Tank drain pump triac failure E Tank drain pump triac sensing failure Incongruence between drain pump triac sensing and triac status Input voltage value on microprocessor Always to 0V or to 5V Wiring or Main Board defective Main board defective Cycle Stopped Cycle Stopped Reset Reset E31 E3 E51 Conductimetric sensing oscillation frequency to high The conductimetric electronic circuit has an oscillation frequency out of range (f > TBD Hz) Main board defective Cycle Stopped Reset Main board defective Wiring defective Main board defective Motor defective Wiring defective Motor overheating Main board defective Motor defective Wiring defective Motor overheating Alarm stored in mem E5 Motor thermal cut off Incongruence between motor triac Disable Heaters sensing and triac status Disable Movement After N trials generates E51 Incongruence between motor triac E53 Motor triac sensing failure sensing and triac status Main board defective Cycle Stopped Reset Laundry load too heavy E54 Motor jammed Motor cannot move Low Power Supply Cycle Paused Start Motor defective E61 NTC value doesn t changed after Drying compressor defective Heating timeout some minutes since every heating Wiring or main board defective Cycle Paused Start cycle step start NTC out of hole E6 Compressor relay failure Incongruence between compressor Wiring or main board defective Forced Alarm Cooling sensing and relay driving after N Relay defective Program trials Reset E63 Heater thermostat defective Alarm stored in mem Compressor automatic Incongruence between compressor Heater defective Disable Heaters thermostat sensing and relay driving Wiring or main board defective After N trials generates E6 E64 Compressor sensing failure E65 E66 E67 E71 E7 E8 E93 E94 E95 E97 EB1 EB EB3 Conductimetric sensing oscillation frequency to low Motor triac failure Main Fan relay failure Main fan automatic thermostat Main fan sensing failure Drying NTC1 failure Drying NTC failure Wrong selector reset position detection Machine configuration error Cycle Configuration error Communication error between microprocessor and external EEPROM The conductimetric electronic circuit has an oscillation frequency out of Incongruence between motor triac sensing and triac status Incongruence between compressor sensing and relay status Incongruence between main fan sensing and relay driving after N trials Incongruence between main fan sensing and relay driving Incongruence between main fan sensing and relay status Voltage value out of limit (open circuit or short circuit) Voltage value out of limit (open circuit or short circuit) Reset position code read on selector out of power fail management Incongruent values on configuration data at power-on (checksum error) Incongruence values on configuration data at power-on (checksum error) Error detected during external EEPROM data read/write CTF file doesn t contain all SCF CTF mismatch error programs specified into SCF file Power supply frequency out of Power supply period lower/higher limits than configured values MAIN_V sensing input voltage value Power supply voltage too high on microprocessor to 5V MAIN_V sensing input voltage value Power supply voltage too low lower than configured value Main board defective Cycle Stopped Reset Wiring or main board defective Relay defective Heater thermostat defective Heater defective Wiring or main board defective Forced Alarm Cooling Program Alarm stored in mem Disable Heaters After N trials generates E6 Main board defective Cycle Stopped Reset NTC defective Wiring or main board defective NTC defective Wiring or main board defective Main board defective Wrong configuration data on EEPROM Main board defective Wrong configuration data on EEPROM Main board defective Main board defective Cycle Stopped Reset Wrong configuration Cycle Stopped Reset Wrong or disturbed Power Supply line. Main board defective Wrong or disturbed Power Supply line. Main board defective Wrong or disturbed Power Supply line. Main board defective Cycle Stopped Cycle Stopped Forced Alarm Cooling Program No Action Cycle Stopped Cycle Stopped Cycle Stopped Cycle stopped by power fail management Cycle Stopped Cycle stopped by power fail management Reset Reset Reset Reset Reset Reset Reset 06.005 R.Kurzke - 30 -
9.4. Errors codes / Alarm codes Display ing the alarms to the user Operation of the alarms is configurable according to the model. Some or all of the alarms may be displayed to the user. Normally, all alarms except E44, E5, E63, E94, EB are displayed to the user. When an alarm condition occurs, the drying cycle may be interrupted or paused; in some cases, for the sake of safety, a forced cooling cycle is performed. In this case, the electronic board, if possible, disconnects the power relay from the heater unit and powers the motor of the drum cooling fan. The cycle remains active until the user switches off the appliance. Reading the alarm codes To read the last alarm code memorized in the EEPROM of the electronic board, proceed äs follows: - Access diagnostics mode - Turn the Programme selector knob clockwise to the eleventh position. Displaying the alarm code - First digit: letter E - Second digit: the family of the alarm - Third digit: the number of the alarm Reading the alarm codes The last alarm code memorized can be displayed even ifthe appliance is in normal operating mode (e.g. while the drying Programme is being performed): - Press (start/pause) and the first button in the left of it simultaneously for at least 5 seconds: the display shows the last alarm. The alarm sequence continues to flash as long as the two buttons are held down. The appliance continues the cycle while the alarm codes are being displayed. If the appliance is in Programme selection mode, the options previously selected are stored in memory. Cancelling the last alarm memorized It is good practise to cancel the alarm code from memory: - After reading the alarm, to check whether it is repeated during the diagnostics cycle. - After effecting repairs to the appliance, to check whether it is repeated during testing. - Access diagnostics mode and turn the Programme selector knob to the eleventh position (alarm reading) - Press buttons 6 (start/pause) and 4 simultaneously. - Hold down buttons 6 and 4 (about 5 seconds). - Once the alarm has been cancelled, EOO is displayed. Notes concerning certain alarm codes -Configuration alarm E93: When configuration alarms are displayed (when the appliance is switched on), the appliance is inoperative and all the LEDs light. It is not possible to access diagnostics mode; the only possible Operation is that of switching off the appliance (selector knob on position 0 ). Alarms EB1-EB-EB3: In the event of problems with the power supply, the appliance remains in alarm mode until the voltage and frequency are restored to within the normal limits or the appliance is switched off (selector knob on position 0 ). Alarm family B is displayed and it is not possible to access diagnostics mode norto use the rapid alarm display function. The complete alarm can be read only when the abnormal condition has terminated. 06.005 R.Kurzke - 31 -
10.1 Wiring 1 1. Suppressor. Microswitch doorlock 3. Drumm light 4. Compressor motor 4.1. Condenser compressor 5. Drum motor 5.1. Condenser drum motor 6. Fan motor 6.1. Condenser fan motor 7. Compressor cooling fan 8. Main switch 9. Floater micro switch 10. Canister filling pump 11. NTC 1. Brush (conductimethc sensor) 13. Display electronic module 14. Main electronic module 06.005 R.Kurzke - 3 -
10. Wiring 06.005 R.Kurzke - 33 -