frost-free chest freezers - electrolux free chest freezer... · frost free evaporator unit fitted...

Frost-free Chest FreezersJászberény Factory

ESSE-N / A.S. October 2004

2

General

First frost-free chest freezer on the market

Factory HUC = Jászberény / Hungary

simple electronic control ERF1050 without temperature display (known already from different ZF/Florence products)

Climatic class SN-N-ST

Energy efficiency class B

Refrigerant R600a

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General

Same housings with integrated condenser as current static chest freezers

Frost free evaporator unit fitted into interior

New inner linings with ducting to allow air circulation

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Basic Models & Sizes

C225FF, 205 litres:920 721 069 Electrolux ECS 2070920 721 071 AEG-Electrolux Arctis 75210GT

Compressor HTK70AA

C265FF, 235 litres :920 595 085 Electrolux ECS 2370920 595 088 AEG-Electrolux Arctis 75240GT

Compressor HTK80AA

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Basic Models & Sizes

C335FF, 305 litres :920 603 081 Electrolux ECS 3070920 603 083 AEG-Electrolux Arctis 75310GT

Compressor EMY46CLP

Other models under local or OEM brands, but all derived from these 3 basic models

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Frost-free Chest Freezers

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Air Circuit

Evaporator

Drain tray

Air ducts in lid

Bottom air ducts

Fan

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Lid

Air inlet

Air outlets

Ice cube trays

Lamp cover

Lid lining with air ducts

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Lid with Air Ducts

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Compressor, Evaporator UnitBottom Air Duct

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Evaporator Unit

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ERF1050 Electronic Thermostat

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Wiring

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Deckelöffnung

Pendulum switch in lamp housing closes when lid is opened to approx. 45°, and activates:

Lamp ON

Evaporator fan OFF

Signal to electronic control, which:

triggers door alarm

is memorized for defrost

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Alarms

Temperature alarm at -11°C (red LED + buzzer)

Lid opening alarm after 80 sec (buzzer only)

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Fast Freeze

Start:either automatic after power onor manually selected by pressing the button

Operation:compressor run corresponding to maximum settingyellow LED on

End:Automatic after 48 hoursor manually de-selected by pressing the button again

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Defrost

First defrost: 5 hours after power-on, or after power reset

After that defrost is initiated after 14, 30 or 71 hours -depending on lid openings

Actual defrost start is after the next compressor cut-out(If the compressor continues to run for more than 2,5 hours, it will be forcibly stopped)

Minimum defrost time: 20 min

Defrost heater is in series with a fixed bimetal thermostat, which opens at +5°C, closes at -4°C

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Defrost

After the minimum defrost time (20 min), the electronic control starts checking once a minute if the thermostat has opened

Once this has happened, the heater triac will also switch off the supply to mark defrost end

Compressor start 5 min after defrost end

Fan start 3 min after compressor start (N.B.: simultanoeus start on initial software version

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Defrost

Safety:

Temperature limit + 40°C (thermostat in series with the other side of the heater

Time limit 60 min

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Manual Defrost

Appliance ON, lid closed (cavity must be cold enough for the defrost end thermostat to be closed)

Turn temperature selector knob to OFF

Open and close lid 4 times, waiting for at least 1 sec between each opening and closure (make sure lid is opened wide enough so the light will switch on)

Turn temperature selector knob to the maximum setting N.B.: all these operations (i.e. since starting the procedure byturning the knob to OFF) must be performed within 15 sec; if this time is exceeded, unplug the appliance and re-start procedure.

Defrost will now start in the normal sequence

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Defrost Heater Failure

If the defrost heater is interrupted or disconnected, this will be shown by the flashing green and yellow LEDs

Defrost will last 1 hour

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Sensor Characteristic

0

10

20

30

40

50

60

70

80

90

-40°C -30°C -20°C -10°C 0°C +10°C +20°C +30°C +40°C

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Sensor Failure

If sensor resistance is outside of working range (thus assumning interruption or short circuit)

Red alarm LED flashingGreen LED litFixed compressor cycle : 30 min ON / 45 min OFFFixed defrost cycle : every 14 hours