tumble - dryer with heat pump - · pdf file7 technical data type: condensed dryer sensor...

Tumble - Dryer With Heat PumpDevelopment on basis of Nexus 4( EDR 2000 )

2

Function of heat pumpFunction of heat pump

3

R134a Charakteristik

36%-10123456789

101112131415

-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60

Evaporation Temperature [°C]

Rel

ativ

e P

ress

ure

[bar

]

R600a

R134a

R12

4

R134a Working range heat pump

36%0

5

10

15

20

25

30

35

40

-30 -20 -10 0 10 20 30 40 50 60 70 80 90 100

Evaporation Temperature [°C]

Relat

ive P

ress

ure [

bar]

Pressure switch

High pressure line

Low pressure line

R134a filling weight: 290grams

5

Measured pressures in condenser and evaporator

36%0

2

4

6

8

10

12

14

16

18

10

:46

10

:49

10

:52

10

:55

10

:58

11

:01

11

:05

11

:08

11

:11

11

:14

11

:17

11

:20

11

:24

11

:27

11

:30

11

:33

11

:36

11

:39

11

:43

11

:46

11

:49

11

:52

11

:55

11

:58

12

:02

12

:05

12

:08

12

:11

12

:14

12

:17

12

:21

12

:24

12

:27

12

:30

12

:33

12

:36

Zeit

bar Verflüssiger

Verdampfer

Evaporator

Condenser

6

Measured temperatures in condenser and evaporator

36%0

10

20

30

40

50

60

70

10

:46

10

:49

10

:53

10

:56

11

:00

11

:03

11

:07

11

:10

11

:14

11

:17

11

:21

11

:24

11

:28

11

:31

11

:35

11

:38

11

:42

11

:45

11

:49

11

:52

11

:56

11

:59

12

:03

12

:06

12

:10

12

:13

12

:17

12

:20

12

:24

12

:27

12

:31

12

:34

Zeit

Tem

pera

tur

°C

Temperatur am VerdampferTemperatur am Verflüssiger

Condenser

Evaporator

7

Technical data

Type: Condensed dryerSensor system: Clothes conductivity measurementApplication: AEG BrandFactories: DGNPower supply: 230/240V - 50HzDrying heaters relays used to drive:– Heat pump compressor (with external relay?)– Refrigerant: R134a– Process Air fan

Door device output used to drive the compressor cooling fan --- No electric door opening available ---Door reversibility: available by end userDrum light: Available (driven by separate triac)

8

Technical data

Tank Position: upper tank only (with tank pump)NTC: up to 2 inputs availableTransportation of EDR 2000AEG specification:– Same user interface layout (push buttons, leds, digits)– Same cycles– Same options

Same configuration philosophy / tools30% less energy consumptionDeclaration for 6kg wash load

36%

9

General Objectives

Standardisation of electronic solutions:Same Main board of EDR 2000 AEG

(creation of a variant with specific software)Use of new software concepts:

– User interface configuration– Cycles configuration

Short software debugging due to:– Use of the same software structure of EDR 2000AEG– Only changes are on:

–Compressor management–Process fan management–NTC management

10

Basement Circuits

Condenser

Expansion valve

Electric Coolingfan compressor

Hot and Dry Air

Electric Fan

Cold and Dry Air

Plastic Basement

- Process air

- Heat pump circuit

Asynchronous Motor NEXXXT

H20

Evaporator

Compressor

Hot and Humid Air

11

AEG NEXXXT Design

• Consumption: A-class• Program duration: 140 min (6kg), 110 min (5kg) • Noise: <65 dBA (Techn. Declaration)• Condensation efficiency 75%; improvements

needed to fit to “gut/sehr gut” STIWA (new project)

• 16 and 20 position knob• Drum light• Reversible door

12

Cycle options

Push button options: Time Saving The aim is to reduce the drying programs duration.It affects a five minutes shorter cool down.

Gentle movement Option with red. mechanical agitationVery gentle movement Option with red. mechanical agitation but additional with

reduced load ( 3 kg ).

Half Load

This option should be selected when in a high load declared cycle (5-6kg), only half load is inserted in the drum. This option affects the cycle behaviour (motor movements ) in order to optimize it for small loads.

13

Cycle options

Long Anticreasing

This option is used to prevent laundry creases if user isn't able to remove laundry from dryer at the end of the cycle. A "normal" anticrease (duration 30min) is always planned at the end of nearly every cycle. This option increases the anticrease duratio

Final humidity adj.It is a fine tuning of final humidity. If the user is not happy about "default" final humidity target, with this option he can adjust it (range is about -2% 4% respect default value)

Push buttons combination feature:

Water Conductivity adj.

This option could be modified by pressing the specific push button combination, depending by water conducibilty level of country target. There are 3 levels of water conducibility: 250, 450 and 750 microSiemens. Default level is 450uS. This option affects

14

Cycle options

Features:Fast Program End

(FPE)

This cycle feature is enclosed in all humidity controlled drying program (Cottons, Easy Cares and some Special programs). It consist in a fast detection of wet laundry inside the dryer. If it finds no laundry or dryed laundry it signals the cycle end (in

Indication of humidity level

For Cottons and Easy Cares programs, this is a LEDs indication, during a drying cycle execution, of the current status of the laundry inside the drum.

15

Electonic components

The attached links will show you the specificationdrawings of the electrical components:

CompressorHeat pump basement group

Motorcooling fanFan motorMotor capacitor Relais for heat pumpCarbon brush

16

Wiring diagram

17

Service mode

To enter the diagnostic mode, turn program selector to the first position clockwise. Then press buttons START/PAUSE andthe left button beside simultaneously for about 5 seconds .To exit the diagnostic mode, switch OFF the appliance.

Then switch it ON, and switch it OFF AGAINThis is to avoid the machine go into factory test mode.

18

Service mode

checked functions:• User interface functionalityactuated components:• all LEDs light in sequence• if a pushbutton is depressed, thecorresponding LED lights, andbuzzer sounds if applicable

conditions:• none

Selector in position 1

19

Service mode

checked functions:• tank pump • tank switch

Attention: the lower tank has to be filled with water, that the level switchis closed !!!

actuated components:• tank switch• tank pump• compressor fanconditions:• door closed • Time out 10minutes


20

Service mode

checked functions: • to test motor in counter clockwise direction

actuated components:• motor• motor triac• relay of direction• compressor fan

conditions:• door closed• Time out 10 minutes

Selector inposition 3

21

Service mode

checked functions: • to test motor inclockwise direction(low speed for visual inspection of drumshell assembly)

actuated components:• motor• motor triac• compressor fan

conditions:• door closed• time out 10 minutes


22

Service mode

checked functions: • to test the main process fanactuated components:• main fan• motor triac (full speed)• compressor fan



23

Service mode

checked functions: • to test the compressoractuated components:• main fan• compressor• compressor fan• motor triac (full speed)



24

Service mode


checked functions: • to verify cunductimetric sensor inshort circuit condition

actuated components:• conductimetric sensor readingThe step lasts 4 seconds (1sec. To create the short circuit condition by hand). During this time all phase leds are flashing to give information of acquisition phase. At the end of step phase leds are switched on to give ok, otherwise they are flashing forever and alarm E32 is displayed.conditions:• door closed

25

Service mode


checked functions: • to verify conductimetric sensor inopen circuit condition

actuated components:• conductimetric sensor readingThe step lasts 4 seconds (software configured). During this time all phase leds are flashing to give information of acquisition phase. At the end of step phase leds are switched on to give ok, otherwise they are flashing forever.conditions:• door closed

26

Service mode

checked functions:• tank switch

(same test as in diagnostic mode 2,used for factory purposes)

actuated components:• tank switch

conditions:• door closed • Time out 30s


27

Service mode

checked functions: • reading and deleting of the lastalarm code

actuated components:• alarm indication


28

Alarm management

Alarm management is the same like for AEG EDR 2000 (Nexus 4)

with some alarm deviations:- Heating element- Compressor- Electronic door release- Cooling fan- ………

Quick alarm reading with standard key combination ispossible!!!! (Start-/Pause- key and left option key)

29

Alarm management

General:If a failure occurs during normal working condition of the dryer, then analarm will be shown to the customer and the buzzer will be activated.Alarms management is always active.Some alarms require a cooling cycle activation in order to bring the machine in a safe condition, trying to switch off the compressor and starting motor movement to ventilate the internal of the machine. When the alarm cooling program has started, it continues until the user switches off the dryer.Alarm indication:The alarm code has two or three digits, depending on the dryer versione.g. E 5 1

Error Family code alarm code

30

Alarm management

All EDR 2000 dryers will show the alarm code on thetime to end display.The alarm will be shown as E X Y e.g. E51

E = ErrorX = alarm family Y = alarm number

31

Alarm management

Alarm: E21

Tank drain pump triac failureAlarm description:

Incongruence between drain pump triac sensingand triac status

Fault condition:

Wiring or main board defectivePossible fault:

Cycle stopped ResetAction / status:

32

Alarm management

Alarm: E22

Tank drain pump triac sensing failureAlarm description:

Input voltage value on microprocessor always to 0V or to 5V

Fault condition:

Main board defectivePossible fault:

Reset36%Cycle stoppedAction / status:

33

Alarm management

Alarm: E31

Conductimetric sensing oscillation frequency too high

Alarm description:

The conductimetric electronic circuit has an oscillation frequency out of range (f > TBD Hz)

Fault condition:



34

Alarm management

Alarm: E32

Conductimetric sensing oscillation frequency too low

Alarm description:

The conductimetric electronic circuit has an oscillation frequency out of range (f < TBD Hz)

Fault condition:

Main board or wiring defectivePossible fault:


35

Alarm management

Alarm: E51

Motor triac failure Alarm description:

Incongruence between motor triac sensingand triac status

Fault condition:

Wiring or main board defectiveMotor defectiveMotor overheating

Possible fault:


36

Alarm management

Alarm: E52

Motor thermal cut off Alarm description:


Fault condition:

Wiring or main board defectiveMotor defectiveMotor overheating

Possible fault:

36%Alarm stored in memoryDisable movementAfter n trials generates E51

Action / status:

37

Alarm management

Alarm: E53

Motor triac sensing failure Alarm description:


Fault condition:



38

Alarm management

Alarm: E54

Motor jammed Alarm description:

Motor cannot move Fault condition:

Laundry load too heavy Low Power SupplyMotor defective

Possible fault:

Start36%Cycle pausedAction / status:

39

Alarm management

Alarm: E61

Heating timeout Alarm description:

NTC value hasn’t changed after some minutes since every heating cycle step start

Fault condition:

Drying compressor defectiveWiring or main board defectiveNTC out of position

Possible fault:

Start36%Cycle pausedAction / status:

40

Alarm management

Alarm: E62

Compressor relay failure Alarm description:

Incongruence between compressor sensing andrelay driving after n trials

Fault condition:

Wiring or main board defectiveRelay defective

Possible fault:

Reset36%Forced alarm cooling cycleAction / status:

41

Alarm management

Alarm: E63

Compressor automatic thermostat Alarm description:

Incongruence between compressor sensingand relay driving

Fault condition:

Thermostat defectiveCompressor defectiveWiring or main board defective

Possible fault:

36%Alarm stored in memoryDisable compressor After n trials generates E63

Action / status:

42

Alarm management

Alarm: E64

Compressor sensing failure Alarm description:

Incongruence between compressor sensingand relay status

Fault condition:



43

Alarm management

Alarm: E65

Main Fan relay failureAlarm description:

Incongruence between main fan sensing and relay driving after n trials

Fault condition:

Wiring or main board defectiveRelay defective

Possible fault:


44

Alarm management

Alarm: E66

Main fan automatic thermostat Alarm description:

Incongruence between main fan sensingand relay driving

Fault condition:

Fan motor defectiveWiring or main board defective

Possible fault:

36%Alarm stored in memoryDisable compressorAfter n trials generates E66

Action / status:

45

Alarm management

Alarm: E67

Main fan sensing failure Alarm description:

Incongruence between main fan sensingand relay status

Fault condition:



46

Alarm management

Alarm: E71

Drying NTC1 failure Alarm description:

Voltage value out of limit (open circuit or short circuit)

Fault condition:

NTC defectiveWiring or main board defective

Possible fault:


47

Alarm management

Alarm: E72

Drying NTC2 failure Alarm description:

Voltage value out of limit (open circuit or short circuit)

Fault condition:

NTC defectiveWiring or main board defective

Possible fault:

36%No actionAction / status:

48

Alarm management

Alarm: E82

Wrong selector reset position detection Alarm description:

Reset position code read on selector out of power fail management

Fault condition:



49

Alarm management

Alarm: E93

Machine configuration errorAlarm description:

Incongruent values on configuration data at power-on (checksum error)

Fault condition:

Wrong configuration data on EEPROMMain board defective

Possible fault:


50

Alarm management

Alarm: E94

Cycle Configuration error failureAlarm description:

Incongruence values on configuration data at power-on (checksum error)

Fault condition:

Wrong configuration data on EEPROMMain board defective

Possible fault:


51

Alarm management

Alarm: E95

Communication error between microprocessor and external EEPROM

Alarm description:

Error detected during external EEPROM data read/write

Fault condition:

main board defectivePossible fault:


52

Alarm management

Alarm: E97

SCF – CTF mismatch errorAlarm description:

CTF file doesn’t contain all programs specified into SCF file

Fault condition:

Wrong configurationPossible fault:

Reset36%Cycle StoppedAction / status:

53

Alarm management

Alarm: EB1

Power supply frequency out of limits Alarm description:

Power supply period lower/higher than configured values

Fault condition:

Wrong or disturbed Power Supply line Main board defective

Possible fault:

36%Cycle stopped by power fail managementAction / status:

54

Alarm management

Alarm: EB2

Power supply voltage too high Alarm description:

MAIN_V sensing input voltage value on microprocessor to 5V

Fault condition:

Wrong or disturbed Power Supply line Main board defective

Possible fault:

36%Cycle stoppedAction / status:

55

Alarm management

Alarm: EB3

Power supply voltage too lowAlarm description:

MAIN_V sensing input voltage value lower than configured value

Fault condition:

Wrong or disturbed Power Supply line. Main board defective

Possible fault:

36%Cycle stopped by power fail managementAction / status:

56

Markets & Volumes

36% 300003000UK5000Switzerland2000France3000Scandinavia4000NL3000DK

10000DQuantityCountry

tumble - dryer with heat pump - · pdf file7 technical data type: condensed dryer sensor...

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