HEROBottom Combi for Building-inFSD Compressor with Frequency-Mode Control

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HERO

bottom combi for building- infactory ZS (Susegana)energy efficiency class A++1 FSD compressor with frequency-mode controlmagnetic valveelectronic of the ERF2000 familyuser interface in 2 variants:

AEG-Electrolux:2 separate 7-segment LED displaysother brands (Electrolux, Rex-Electrolux, Arthur Martin-Electrolux, and OEM):new LCD UI (similar to ERF2021)

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HERO Brands and ModelsNon-RoHS Compliant

925 701 651 Santo C91841-4i AEG-Electrolux925 701 652 Santo C91845-5i AEG-Electrolux

925 696 653 ERN2929 Electrolux925 696 654 ARN2934 ArthurMartin-Electrolux925 696 652 FI2210VA++ Rex-Electrolux925 696 655 IKE309-52T Küppersbusch

LED UI

LCD UI

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HERO Brands and ModelsRoHS Compliant

925 701 657 Santo C91841-4i AEG-Electrolux925 701 658 Santo C91845-5i AEG-Electrolux

925 696 656 ERN2929 Electrolux925 696 659 ARN2934 ArthurMartin-Electrolux925 696 658 FI2210VA++ Rex-Electrolux925 696 657 Pro Comfort 77700i Privileg925 696 660 IKE309-52T Küppersbusch

LCD UI

LED UI

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LED User Interface AEG-Electrolux

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LCD User InterfaceOther Brands

N.B.:service manual for this control not yet availablefor accessibility see respective pages in SM 599361769

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LCD User InterfaceOther Brands

SuperFreezing

Shopping / Super Cooling

MODE°C

NightMode* MINIDAC **

* Night Mode sometimes called Special Performance Mode

** DAC = Dynamic Air Cooling

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LCD User InterfaceOther Brands

the display will normally show freezer temperature, and can be switched for 10 sec to fridge temperature by pressing the °Cbutton

alarm condition: display flashing with red backlighting

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Electronic Control

based on ERF2000fridge air sensor FR AIRfridge evaporator sensor FR EVAPfreezer air sensor FZ AIRmechanical door switches for both compartments3 triacs on the power board control:- magnetic valve- fridge lighting- Minidac fan in the fridge (not present in AEG models)frequency mode signal for compressor control is supplied via contacts J6-2 und J6-3 on power board

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Position of The Sensors

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Cooling Circuit with Magnetic Valve

COMPRESSOR

CONDENSER

FRIDGEEVAPORATOR

FREEZEREVAPORATOR

CAPILLARY TUBES

MAGNETICVALVE

FR AIR

FZ AIR

FR EVAP

= sensors

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Connection of Capillaries to Magnetic Valve

Outlet marked “KS”to fridge capillary

Outlet marked “GS”to freezer capillary

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Compressor Control

the FSD compressor in this appliance works in the frequencymode the ERF2000 power board supplies 5V square signals with variable frequencyeach frequency is associated to a compressor speed as per the diagram next slide

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FSD CompressorSpeed vs. Frequency

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Control of The MINIDAC Fan

the Minidac fan is switched onif selected by the user with the MODE button (the fan symbol will be shown in the display)if super cooling mode is selected, i.e. the fridge is set to 2°Cfor 6 hours (the term “Shopping” is used for some brands)by software, depending on ambient temperature, difference between set and actual air temperature in the fridge, door opening time, etc.

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FSD CompressorFrequency Mode Control

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Compressor ControlNormal Operation

compressor speed is determined by software, basically as afunction of

ambient temperaturefreezer setting

further to this, speed is temporarily increased ifcummulated door opening time is longer,the difference between setting and actual temperature is higher

the compressor cycles are sensor-controlled :CUT-IN: (FR AIR and FR EVAP) or FZ AIRCUT-OUT: FR AIR and FZ AIR

magnetic valve control:position KS: FR AIR and FR EVAPposition GS: FR AIR

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FSD CompressorSpeed in Normal Operation

0

500

1000

1500

2000

2500

3000

3500

4000

4500

-24°C -23°C -22°C -21°C -20°C -19°C -18°C -17°C -16°C -15°C

Tamb< 28°C

28°C < Tamb < 35°C

Tamb > 35°C

Compressor Speed[RPM]

Freezer Setting

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Compressor ControlFast Freezing

Continuous compressor run for max. 52 hoursat 3793 RPM if ambient temperature is lower than 35°Cat 4000 RPM if ambient temperature is higher than 35°C

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Compressor ControlNight Mode

Night Mode (labelled „Special Performance Mode“ for some brands) is designed for minimum noise if ambient temperature is above 14°C, the compressor is running continuously, at the speed shown in the graph next slideif ambient temperature is below 14°C, the compressor runs at 1000 RPM, but with sensor-controlled on/off cycles

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Night Mode:Speed vs Ambient Temperature

0

500

1000

1500

2000

2500

14 16 18 20 22 24 26 28 30 32 34 36 38

Compressor Speed[RPM]

Ambient Temperature [°C]

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FSD CompressorConnections

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FSD CompressorConnections

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FSD CompressorConnections

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FSD CompressorConnections

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Service Mode

Appliance plugged to power supply

At least one door has to be open

Switch off appliance using main switch

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Service Mode

Within 10 seconds, simultaneously press the “°C” and the “Mode” buttons for 5 seconds

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Service Mode

1. Long beep, all LCD elements are on, then offPress “°C” or “Mode” to advance to the next steps

2. Compressor test (display shows “0”)For this and the following load tests use the “ON/OFF” button toswitch load on or off. Load on is shown by in the display. When advancing to the next test, the load is left in the last status.

3. Magnetic valve (display shows “1”)

4. Fridge lighting (display shows “2”)

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Service Mode

5. MINIDAC fan (display shows “3”)

6. Door switchesleft digit in display for freezer door / right digit for fridge door“0” door closed / “1” door open

7. Potentiometer: “0” to “7” shown in display, depending on positionno button pressed - L.H. pot. “ON/OFF” pressed and in display - R.H. pot.

8. LCD backlighting: all colours and intensities are shown in sequence

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Service Mode

9. Temperature sensor test:E0 no faultE1 evaporator sensor faultE2 ambient sensor faultif both faulty, evaporator sensor has priorityair sensor faults are shown in the user mode

10. EEPROM code and software variant code:each code starts with a long beepcharacters of the same code are divided by short beepsautomatic advance from on character to the next

11. After this, the magnetic valve is activated 6 times

12. Press “ON/OFF” to end the service mode(without this action, service mode will end automatically after 40 minutes)