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BFPR
Bottom Freezer Product Range
April 2004 ESSE-N /A.S. 2
BFPR
BFPR = Bottom Freezer Product Range is the new bottom combi range from Mariestad factoryOuter housing as on previous combi rangeBase and inner lining modified, resulting in:
inner freezer bottom 5 cm lower more volume with identical external dimensions
stainless steel doors with “anti-fingerprint” treatment
April 2004 ESSE-N /A.S. 3
BFPRVariants
2-compressor combis with static cooling in refrigerator2-compressor combis with dynamic cooling in refrigerator (DME = Dynamic Mini Evaporator)1-compressor combis with magnetic valve1-compressor combis with magnetic valve and RSD compressor for appliances with energy label A++ (electronic box for compressor now bonded to bottom plate because of reduced space)Bottom freezer always with static cooling
April 2004 ESSE-N /A.S. 4
BFPREvaporator Variants
Freezer : tube evaporatorRefrigerator :
Semi-hidden evaporator on most models(higher energy efficiency) DME battery evaporator with 1 fanDME battery evaporator with 2 fans on models with 0°C compartmentHidden (foamed) evaporator on 1-compressor combis with magnetic valve
April 2004 ESSE-N /A.S. 5
BFPRControl Variants
Electromechanical thermostatsFLECERF2000ERF2000 with LCD on door (new, AEG only)ERF2050 (evolution from ERF2000, to use additional sensor, and to drive second fan on models with 0°C compartment)ERF2050 with LCD on door
April 2004 ESSE-N /A.S. 6
BFPRSensors
Up to 4 NTC sensors:
refrigerator air sensor white wiringrefrigerator evaporator sensor black wiringair sensor for 0°C compartment white wiring with marking
freezer air sensor brown wiring
Sensors are available as spare parts, and can be replaced
However, 2 or 3 sensors may have a common connector;then they come as a single spare part, so all of them have to be replaced
April 2004 ESSE-N /A.S. 7
Semihidden Evaporator
Evaporator must be unfastened for sensor or thermostat replacement - see Service Bulletin 599252769
April 2004 ESSE-N /A.S. 8
DME
Dynamic Cooler with
DME = Dynamic Mini Evaporator
Battery evaporator
Fan to reduce temperature gradient to about 1° C
April 2004 ESSE-N /A.S. 9
a
b
c
d
e
f
DME
a) upper evaporator holderb) Evaporator with gasketc) heat exchangerd) accumulatore) damping mat for injection noisef) lower evaporator holder
April 2004 ESSE-N /A.S. 10
DME Sensors
refrigerator air sensorwhite wiring
refrigerator evaporator sensorblack wiring
air sensor for 0°C compartmentwhite wiring with marking
April 2004 ESSE-N /A.S. 11
ERF2000 DMENew start after switch-on
Compressor and fan start simultaneously
April 2004 ESSE-N /A.S. 12
ERF2000 DMENormal Function
CUT-IN temperature air sensor : depends on settingCUT-IN temperature evaporator sensor : 2.5°CWhen air sensor and evaporator sensor reach their CUT-IN temperatures
Fan starts immediately Compressor starts with 1-2 min delay
CUT-OUT temperature air sensor : depends on setting When air sensor reaches its CUT-OUT temperature
Compressor stops immediatelyFan stops with 5 min delay
April 2004 ESSE-N /A.S. 13
ERF2000 DMENormal Function
April 2004 ESSE-N /A.S. 14
ERF2000 DMEDoor Opening
Fan stops immediately
If door open more than 1 min, compressor stops too
April 2004 ESSE-N /A.S. 15
ERF2000 DMEDoor Opening
April 2004 ESSE-N /A.S. 16
ERF2000 DMEEvaporator Defrost
Normal defrost at every compressor cycle (+2.5°C on evaporator sensor)
“Safety” defrost :after 18 hours accumulated compressor run timeFan ON / compressor OFFFixed duration: 45 min Display shows last temperature before defrost start, or “C” (on some models)
April 2004 ESSE-N /A.S. 17
ERF2000 DMEEvaporator Defrost
Compressor run time
18 hours
April 2004 ESSE-N /A.S. 18
ERF2000 DMEQuick Chill (Coolmatic)
Fan is running continuously
User should open air flap !
Set temperature 2°C
Maximum duration 6 hours
Display shows “C”
April 2004 ESSE-N /A.S. 19
ERF2000 DMEQuick Chill (Coolmatic)
April 2004 ESSE-N /A.S. 20
DME with 0°C Compartment
Cooler fan
Evaporator sensor
0°C-compartment air sensor
0°C-compartment fan
Cooler air sensor
Freezer air sensor
April 2004 ESSE-N /A.S. 21
DME with 0°C Compartment
Cooler air sensor
0°C comp.air sensor
Freezerair sensor
Refrigeratorcompressor
Freezercompressor
Cooler fan
0°C comp. fan
OR
April 2004 ESSE-N /A.S. 22
DME with 0°C Compartment
0°C-compartment fan : 20 VDC
Cooler fan : 24 VDC
April 2004 ESSE-N /A.S. 23
ERF2050
ERF2050 is an “extension” of ERF2000 for 2-compressor combis with DME and 0°C compartment
Can drive additional components:0°C-compartment air sensor0°C-compartment fan
Software adapted for function with 0°C compartment
April 2004 ESSE-N /A.S. 24
ERF2050Circuit
April 2004 ESSE-N /A.S. 25
ERF2050Normal Function
compressor ON, when cooler air sensor OR 0°C-compartment air sensorreach their respective CUT-IN temperatures(N.B.: to ensure correct temperature control in the 0°C compartment, it is not possible to take into consideration the evaporator sensor during normal compressor cycles)
Cooler fan ON, when cooler air sensor reaches its CUT-IN temperature
0°C-compartment fan ON, when 0°C-compartment air sensor reaches its CUT-IN temperature
April 2004 ESSE-N /A.S. 26
ERF2050Normal Function
compressor OFF, when cooler air sensor AND 0°C-compartment air sensorreach their respective CUT-OUT temperatures
Fans OFFIf both fans are running, and one of the air sensors reaches its CUT-OUT temperature, the respective fan will stop immediatelyIf only one fan running, and its air sensor reaches the CUT-OUT temperature, the fan will stop after 2 minutes(i.e. fan running last will stop with 2 min delay)
April 2004 ESSE-N /A.S. 27
ERF2050Evaporator Defrost
After 4 hours accumulated compressor run time
0°C- compartment fan OFFcooler fan ON
Defrost end when evaporator sensor reaches +3°C
April 2004 ESSE-N /A.S. 28
ERF2050Sensor Failure - Refrigerator
Sensor failure is shown if sensor resistance is outside the working range
In refrigerator display:
cooler air sensor failure
evaporator sensor failure
0°C-compartment air sensor failure
EEPROM error
In all these fault cases:Compressor and cooler fan 20 min ON / 30 min OFF0°C-compartment fan OFF
April 2004 ESSE-N /A.S. 29
ERF2050Sensor Failure - Freezer
In freezer display:
freezer air sensor failure
Freezer compressor running continuously
April 2004 ESSE-N /A.S. 30
ERF2050Service features
Raise temperature in 0°C compartment by 2°C:simultaneously press + and - of the refrigerator untilbeep sounds
Raise temperature in freezer by 3°C:simultaneously press + and - of the freezer untilbeep sounds
April 2004 ESSE-N /A.S. 31
SensorsCharactesristic & Working Range
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
April 2004 ESSE-N /A.S. 32
LCD on Door
April 2004 ESSE-N /A.S. 33
Circuit Diagram
ERF2000with LCD on door
April 2004 ESSE-N /A.S. 34
Reversing Door Hinge on LCD-on-Door Models
Separate PNCs will be available with R.H. hinge and L.H. door hinge respectively
Reversing possible for service only
Wiring from user interface in top panel to LCD on door has to be re-routed
Prior to performing this operation, new bows (end caps )for the refrigerator door handle have to be ordered !
208 38 62-04 / 1 top L.H. hinge208 38 62-01 / 7 bottom208 38 62-03 / 3 top R.H. hinge208 38 62-02 / 5 bottomthe top bows have a bigger hole to fit the cable
April 2004 ESSE-N /A.S. 35
LCD on DoorON/OFF
Only one main switch: both compressors will start when switched on
To switch of only one compartment, press corresponding + and - simultaneously, wait for count down
April 2004 ESSE-N /A.S. 36
LCD on DOOR
New mode: SHOPPING
combination of Coolmatic (refrigerator 2°C for 6 hours)with continous run of freezer compressor for 1 hour
April 2004 ESSE-N /A.S. 37
LCD on DoorDEMO Mode
Condition: more than 10°C on both air sensors
Simultaneously pres MODE and ON/OFF for 5 sec long beep
De-activate:same combinationor pull plug
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