Electrolux SANTO 2902i Service Instruction Download Page 2

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AEG-Refrigeration

292 5209

VH34-AUK

06.94

Santo 2941i longfresh

E-Nr.:

621 370 121

(R12)

Santo 2902i longfresh

E-Nr.:

621 371 022

(R134A)

General

The Santo 2941i longfresh has electronically controlled information displays and microproc-

essor controlled regulators for the refrigerator as well as for the 4-star freezer compartment.

A so-called longfresh compartment is integrated within the refrigerator of the appliance. In

addition, refrigerator and longfresh compartment are controlled via a magnetic valve.

Refrigerator compartment

longfresh compartment

4-star freezing compartment

Summary of Contents for SANTO 2902i

Page 1: ...CE INSTRUCTION COLD AEG Hausgeräte GmbH Publ No Muggenhofer Straße 135 599 51 07 03 D 90429 Nürnberg Germany EN Fax 49 0 911 323 1420 TSE N Edition 02 01 LONGFRESH MODELS SANTO 2941i SANTO 2902i SANTO 2932i ...

Page 2: ...ontrolled information displays and microproc essor controlled regulators for the refrigerator as well as for the 4 star freezer compartment A so called longfresh compartment is integrated within the refrigerator of the appliance In addition refrigerator and longfresh compartment are controlled via a magnetic valve Refrigerator compartment longfresh compartment 4 star freezing compartment ...

Page 3: ... contol LCD temp display refrigeration cooling switch cooling longfresh refrigerator refrigerator fan compartment 2 1 1 Main switch Switching on and off of the refrigerator and longfresh compartment is only possible with a pen or similar childproof safety switch Important Do not disconnect from mains supply as logical on and off switching of components is via electronic module 2 1 2 Switch for ref...

Page 4: ...g compartment can be adjusted between 14 to 28o C 2 2 1 Main switch As with the refrigerator switching on and off of the freezing compartment is only possible with a pen or similar childproof safety switch Important Do not disconnect from mains supply as logical on and off switching of components is via electronic module 2 2 2 Fast freeze button Pressing the fast freeze button activates the fast f...

Page 5: ...inationofthetemperaturedisplaysand all LEDs are switched off when the refrigerator door is closed 3 Warning controls longfresh temp control lamp Freezer temperature control lamp Cancel button acoustic signal refrigerator Cancelbuttonacousticsignalfreezer 3 1 Acoustic warning The acoustic signal sounds if one of the two doors is open longer than 30s permanent signal The signal can be switchedoffbyp...

Page 6: ...tatically conventional freezer Points 4 1 and 4 2 therefore only relate to the refrigerator and the longfresh compartment 4 1 Normal defrosting The longfresh compartment and the refrigerator are defrosted automatically after 12 h compressor operation circa once per day Operation of electronic 1 step Pre defrost preparation of defrosting prior to actual defrosting the refrigerator temperatures are ...

Page 7: ...ples 5 1 Freezer The Santo 2941io longfresh is equipped with a conventional 4 star freezing compartment This freezing compartment operates completely independent with respect to refrigeration and control technology The following description therefore relates mainly to the refrigerator and longfresh compartment 5 2 Refrigerator and longfresh compartment The refrigerator incorporates a back panel ev...

Page 8: ...sh cooling fan Depending on the air sensor condition the electronic activates the following functions a Both cooling fans are warmer than the cut in value compressor ON magnetic valve without voltage i e refrigerator and longfresh compartment are cooling b The refrigeration fan is warmer than the cut in value the longfresh air sensor is between ON and OFF value compressor ON magnetic valve without...

Page 9: ...on Only then compressor ON magnetic valve without voltage i e refrigerator and long fresh compartment are cooled longfresh fan cycles Note The refrigerator has first priority with regard to refrigeration technology and second priority with regard to automatic control technology The longfresh compartment on the other hand has second priority with regard to refrigeration technology as the coolant fl...

Page 10: ...er by 0 5K than the cut in value the refrigeration fan is switched parallel to the compressor b The actual temperature of the longfresh compartment is colder than initial rated value the refrigeration fan is switched parallel to the compressor the longfresh fan cycles c The actual temperature in the longfresh compartment is colder by 0 5K than the cut off value the refrigeration fan is switched pa...

Page 11: ...ed white blue black LED red LED yellow LED yellow LED green white red green 1 2 3 4 5 6 10 11 12 13 14 15 16 17 18 21 22 23 24 25 26 27 28 29 30 33 34 35 36 6 Components The Santo 2941i contains 3 electronics one operational PCB and one logical PCB as well as a performance PCB 6 1 Arrangement of terminal block of logical PCB view from top ...

Page 12: ...or and one air sensor The air sensor measures the actual temperature within the refrigerator and regulates the compressor as well as the fan The evaporator sensor measures the evaporator temperature of the Rollbond evaporator It is therefore responsible for ending the defrost process and for fault diagnosis Refrigeration evaporator sensor run in tube Refrigeration air sensor 6 1 2 Refrigeration fa...

Page 13: ...longfresh compartment is equipped with a 230V shaded pole motor with radial fan During normal operation the longfresh fan runs parallel to the compressor 10 min overrun The circulating air creates a layer of air around the longfresh shelves to ensure even temperature distribution on the outside of the longfresh compartment Without fan very low parallel temperatures would result which would lead to...

Page 14: ...resh compensation heater The longfresh compensation heater 10W is fitted directly underneath the U evaporator It is integrated and therefore not replaceable The longfresh compensation heater serves two functions shortening of defrost process in longfresh compartment see point 4 1 supporting of automatic control and refrigeration technological functions see point 5 2 3 and 5 2 4 6 3 Magnetic valve ...

Page 15: ... NTC resistor the freezer air sensor The freezer air sensor switches the compresser on and off and is responsible for activating warning signals Freezer air sensor 7 Low ambient temperature In case of low ambient temperatures and ensuing long compressor down times the longfresh fan is switched on for a period of 10 min every 30 min This ensures even longfresh temperatures under these circumstances...

Page 16: ...sh compartment 0 3 o C Cut in value for refrigerator on setting 1 14 4 o C Cut in value for refrigerator on setting 4 6 1 o C Cut off value for refrigerator on setting 1 13 4 o C Cut off value for refrigerator on setting 4 5 1 o C Display offset for refrigerator on setting 1 2 0 K Display offset for refrigerator on setting 4 3 0 K Cut in value for freezer on setting 1 10 5 o C Cut in value for fre...

Page 17: ... refrigerator and simultaneously switching on refrigerator Pre condition for the correct functioning is an uncooled appliance 9 2 Procedure of self test 1 Once switched on the LCD display shows dA for Danfoss magnetic valve or El for Elbi magnetic valve 2 Press cancel button for refrigerator once CL for degree Celsius or FH for degree Fahrenheit is displayed 3 Press cancel button for refrigerator ...

Page 18: ...r in operation no voltage on magnetic valve Principle to a The evaporator sensors cool faster than the air sensors It can therefore be checked whether the sensors are crossed over Principle to b The compressors are switched on for a limited time only The evaporator temperatures are then checked before switching on and after switching off and the measurements compared with pre set minimum values Pr...

Page 19: ...3 4 Step 5 This step checks the warning facilities of the freezer Procedure open freezer door permanent acoustic warning signal close freezer door normal operation During the self test the LCD displays show background illumination when the door is closed To test the electronic only it is possible to switch straight to test step 4 immediately after the start of the self test by pressing the cancel ...

Page 20: ...EEPROM not or incorrectly connected F1 KT U evaporator not cooled in sensors crossed longfresh fan not pre set time period running cooling system in longfresh compartment blocked F2 KT air in longfresh compartment sensors crossed longfresh fan not cooled in pre set time not running magnetic valve not period switched F3 KT U evaporator too warm sensors crossed appliance was not compared to longfres...

Page 21: ...nd displayed during the self test only The following faults cannot be detected by the electronic during self testing defective refrigeration fan blocked impeller broken winding defective compensation heating 11 Further hints for fault diagnosis A magnetic valve that is not switched can be recognised by the fact that the refrigeration temperature falls considerably After some time the refrigerator ...

Page 22: ...75l 47l Freezer 67l 47l Total 281l 231l 11 1 longfresh compensation heating p 10W R 5kOhm 11 2 Compressors original compressors ET compressors Freezer Aspera BP 1084 A ET No 671 069 887 Refrigerator Aspera BP 1072 A ET No 671 069 602 11 3 Fan Refrigerator fan DC motor with continuous magnetic rotor U 12V p 0 8W n 20001 min longfresh fan shaded pole motor with radial fan U 220 240V n 28001 min 11 4...

Page 23: ...air sensor Manufacturer s marking stamped on tubing L66H 2002 longfresh evaporator sensor Manufacturer s marking stamped on tubing L66H 2002 longfresh air sensor Manufacturer s marking stamped on tubing L66H 2002 Freezer air sensor Manufacturer s marking stamped on tubing L66H 2002 Temperature resistance table all NTC sensors have the same value Temperature o C Resistance k 40 328 40 30 173 90 20 ...

Page 24: ...1 370 121 R12 Santo 2902i longfresh E Nr 621 371 022 R134A Leistungsplatine Logikplatine Bedienteilplatine green red white white blue green green E1 R2 Y1 M3 2 M3 1 29 BK 30 BN 27 BK 28 BN 25 BK 26 BN 23 BK 24 BN 21 BK 22 BN L R8 Q7 Q8 S1 PE R9 M1 M2 R12 R1 R2 C1 C1 R10 R11 N ...

Page 25: ... Q8 Motorschutzschalter Klixon Gefrieren motor protection switch klixon freez R1 Anlauf PTC Kühlen starting PTC cooling R2 Abtauheizung defrost heating R3 Anlauf PTC Gefrieren starting PTC freezing R8 Gefrierteil Luftfühler freezer air sensor R9 Kühlteil Verdampferfühler refrigerator evaporator sensor R10 Kühlteil Luftfühler refrigerator air sensor R11 longfresh Verdampferfühler longfresh evaporat...

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Electrolux SANTO 2902i, Service Instruction

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