SERVICE MANUAL REFRIGERATING
Contents
1. 1 3 A For 105 sec pause For 15 sec min the compressor is switched on power consumption gt 0 5 A where U 230 V Trouble Shooting and Remedies Malfunction with functional alarm activated tool wrench Due to the intelligent control and display system the following malfunctions are early recognized and indicated Sensor failure Defrost heating failures Faults of the refrigeration cycle Failure of the temperature control button Sensor failure The electronic is capable of detecting any sensor failure where prohibited resistance values occur The table below shows the limit resistance values of evaporator and air temperature sensors You should refer to this table for fault finding by means of resistance measuring Temperature C Resistance kQ If the measured resistance values are equal to the values mentioned in the table the fault can only be located in the refrigeration cycle the heaters or the temperature control button that is the logic board 15 599511561 DE Special Features 292 5210 62 Refrigeration Equipment Specific Part 9 7 4 Faults of the refrigeration cycle The electronic system recognizes a malfunction in the refrigeration cycle by determining the difference of temperature between evaporator and air temperature sensor Alarm message unless the evaporator temperature has not fallen below the air temperature by 3 K minimum within 15 min of switching on the compressor2. on super mode after any air temperature changes and as soon as actual temperature passes beyond the defined bandwidth In order to avoid temperature steps in normal mode air sensor temperature is displayed after two differing retard periods only The 2 changing speeds are defined as follows during heating up temperature change within 12min by max 1 K during cooling temperature change 1 min each per 1 K Exception On battery mode the displayed temperature equals the measured temperature plus a correcting value of 1 K Averaging will be reactivated when set point and actual temperature are equivalent again set point actual temperature 3 599511561 DE Special Features 292 5210 71 Refrigeration Equipment Specific Part 10 4 Control and Information System monitor LED display Tool wrench defrost warning temperature alarm door alarm battery alarm 10 4 1 Function warning tool wrench Like on the electronic controllers used up to now this warning will be activated on sensor failures defrost heating failures faults in the refrigeration cycle and defective temperature selector switches Changes compared with the previous no frost controller Defrost heating failures The electronic system recognizes defrost heating failures by means of the evaporator thermal sensor comparing evaporator temperatures at the beginning of the defrosting phase and 15 min afterwards If no temperature increase gt 10 K oc
3. 2001 Switching the compressor ON The compressor is switched ON relay voltage free if the self test is over after expiring at least 5min after the compressor was switched off by the electronic controller minimum standstill 5min and at the same time the current temperature at the air sensor actual temperature is by 0 67 K minimum higher than the preset temperature set point temperature Switching the compressor OFF The compressor is switched OFF relay operated if the current temperature at the air sensor is by 1 K minimum colder than the preset temperature set point temperature or the defrosting cycle is reached or the previously started Superfrost function is finished Permanent compressor operation The appliances are provided with the so called positive failure mode that is the compressor is switched to permanent operation when the following faults occur prohibited sensor resistances such as sensor short circuit break or when the defrost heater is defect or if the temperature setter is defect meaning that the logic board must be exchanged or if malfunctions occur on the refrigeration cycle or if the Superfrost function was selected however the Superfrost function is limited in time and temperature 13 599511561 DE Special Features 292 5210 59 Refrigeration Equipment Specific Part 9 4 6 9 4 6 1 9 4 6 2 9 4 6 3 05 2001 Heater control Defrosting on de
4. in front of the evaporator 05 2001 16 599511561 DE Special Features 292 5210 63 Refrigeration Equipment Specific Part Problem Cause and Remedy Ice beneath the bottom drawer Temperature leaps on display defrost alarm drop sign is lit Temperature alarm is lit triangle Condenser in permanent mode evaporator is cold however no refrigeration occurs in the other parts of the equipment the tool wrench is not lit selected temperature is not reached Formation of ice on the evaporator Noise after closing the door After switching on the condenser is not immediately started Inside lighting is permanently on Temperature display during longer period of door open indicates a higher temperature than that selected Defrosting water runs into the equipment Check defrosting water discharge funnel missing defrosting water cannot be discharged into the funnel funnel frozen up If refrigeration capacity is sufficient there was a power failure During defrosting the highest and the current storage temperatures are displayed alternating No sufficient refrigeration capacity or too much warm freezing stock has been stored Fan is disabled or defect check and replace if necessary Defrost heater defect surface heating defect power board relay defect door not correctly sealed Check the laying of the defrosting water discharge hose suction pipe passage leaking The electronic system will st
5. is important that an interference filter is installed in the compressor tagboard whenever the power board is not provided with a PE connecting line 10 2 Superfrost Function By pressing the Superfrost button the Superfrost function can both be activated and deactivated Usually the Superfrost function is automatically stopped at 32 C air temperature In order to avoid too short operation time with minor charging the Superfrost function is stopped after 30 hours only at the earliest If air temperature of 32 C is not reached the electronic controller stops the Superfrost function after 51 hours 05 2001 De 599511561 DE Special Features 292 5210 70 Refrigeration Equipment Specific Part 10 3 05 2001 Determination of actual temperature to be displayed visible on the LC display In order to suppress during one control cycle and especially during the defrosting phase the display of air temperature oscillation inside the deep freezer actual temperature is averaged for display On start up super mode and after door opening the display shows the temperature detected by the air temperature sensor When reaching the preset nominal temperature the latter will be displayed Any set point deviations within a bandwidth of 2K are suppressed That is the displayed temperature will always be equal to the nominal value so long as the actual temperature is within such a bandwidth Averaging will be stopped after door openings
6. 4 Electrolux O Electrolux Muggenhofer StraRe 135 D 90429 Nurnberg Germany Fax 49 0 911 323 1022 Spares Operation Ausgabe 05 01 II A Publ Nr 599 51 15 61 685 DE SERVICE MANUAL REFRIGERATING EE ve So zi gege Ce Ewe Zr A Zn o A A NO FROST CONTROLLER S 12 93 UNTIL MID 1997 IN DEEP FREEZERS REFRIGERANT R134a Special Features 292 5210 69 Refrigeration Equipment Specific Part 10 No frost controllers from date of manufacture 12 93 10 1 General Technical modifications have been made on microprocessor controlled electronic controllers power board and logical board New electronic units are identified by the printed item numbers 675 125 933 and 675 125 934 which also are the part numbers You can moreover identify the power board 675 125 933 from the separate PE connecting plug tag On deep freezers with such electronic systems the interference filter in the compressor tagboard will no longer be applicable since it is now directly mounted on top of the electronic controller The paper below is focussing on the modifications changed parameters being printed in bold letters Consult the previous description if necessary Technical support please note that from now on only the mentioned power and logic boards will be available So you should also consult Service Instructions 299 500 302 and associated Information Sheets 290 800 002 and 290 800 004 It
7. If the compressor operating time is lt 15 min then the problem check is interrupted 9 75 Failure of the temperature control button The electronic system signals a functional alarm when wrong resistance values of the temperature control button are detected 100 kQ potentiometer Examination is possible with onmmeter directly on the logic board 3 soldering points in the triangle between the two outer soldering points 100 kQ between the central taps and one outer tap depending on the control button position 0 100 kQ If the measured values are not correct replace the logic board 9 8 Test aid Problem Cause and Remedy Evaporator in permanent mode Sensor defrost heater temperature control temperature display colder than 25 C button defect or malfunction of the tool wrench lit refrigeration cycle Fan only running during self test every Light switch is not controlled or is defect 20 min the defrosting cycle is started insufficient refrigerating capacity tool Fan is switched off when evaporator wrench is not lit temperature higher than 10 C no fault Peak power during cooling cycle power The electronic system will switch the supply and power input change due to evaporator on after a minimum standstill period fan pulsing of 5 min no fault After pressing the Super button the Improper sealing by door gasket adjust the evaporator is not immediately switched door or blow dry the door gasket on Hair frost
8. N Superfrost indicator Temperature control button Acknowledgement key Temperature display V ua d o Battery receptacle Door switch Circuit breaker child proof lock 05 2001 9 599511561 DE Special Features 292 5210 53 Refrigeration Equipment Specific Part 9 2 1 9 2 2 9 2 3 9 2 4 9 2 5 9 2 6 05 2001 Start up Switching ON Press the equipment on switch until it clicks into place Within the first 3 min after switching ON the electronic controller runs a self test The compressor will start only after the self test is completed Defrost warning is not enabled is in preparation once the temperature warning is reset Temperature warning is only indicated by display Switching ON without self test by pressing the Superfrost button and at the same time pressing the equipment on switch until it clicks into place Switching OFF Open the door Press the circuit breaker child proof lock for enabling the operating switch Important It is not possible to switch the equipment OFF by pulling the mains plug The electronic controller will continue to run in battery mode whenever mains power is cut You can recognize this by a warning beep every 20 sec Temperature display LCD With the temperature control button extended the set point temperature is flashing on the display With the temperature control button pressed the actual temperatur
9. art the condenser after approx 3 5 min only see self test no fault Door switch is not activated fold up the lower door bearing No fault Door has been opened sometime during the defrosting cycle 599511561 DE Special Features 292 5210 64 Refrigeration Equipment Specific Part 9 9 Components 9 9 1 Evaporator Heating Unit Multi disk evaporator Air temperature sensor NTC thermistor Surface heating defrost water heating Klixon for surface heating Refrigerating accumulators The three refrigerating accumulators will prevent the freezing stock from being heated too much during the defrosting cycle Customer cannot exchange the refrigerating accumulators 05 2001 8 599511561 DE Special Features 292 5210 65 Refrigeration Equipment Specific Part 9 9 2 Multi disk evaporator Klixon for evaporator heating Evaporator temperature sensor NTC thermistor evaporator heating 9 9 3 Pin assignment Location above left in the air channel Klixon surface heating grey 8 Klixon evaporator heating grey Evaporator heating white Surface heating white Klixon evaporator heating white Evaporator heating black Surface heating black Black Klixon surface heating red Red Group pin 2 A ies et Blue power board oes Po Shh Brown EA Blees Fan blu
10. can switch off the alarm by pressing the acknowledge key Acoustic and optical temperature warning are automatically reset once the actual temperature is only 4 K higher than the set point temperature alarm off value After adjusting the set point temperature the temperature warning is disabled and release can be activated only if the warning off value is reached or if the actual temperature exceeds 10 C 15 sec after starting up an optical warning is displayed However if you bypass the self test this will occur immediately The alarm signal will be suppressed until the warning off value is reached for the first time In Super mode the alarm signal is blocked Door alarm Opening the door directly activates door alarm message on the monitor If the door remains open for more than 80 sec the alarm goes off After closing the door the door alarm is reset lt is separately possible to switch the alarm off by using the acknowledge key The door alarm function is disabled during battery operation Battery alarm The battery is checked 15 sec after starting up However when the self test is bypassed this will occur immediately Battery voltage check is done after every battery replacement after every mains failure and prior to any defrosting cycle If the battery voltage is too low e g after 3 days of battery mode the battery alarm will be activated No acoustic warning available 5 599511561 DE 292 5210 73 Special Feature
11. curs the function warning is displayed Diagnosis of Errors To facilitate the diagnosis of errors the occurring faults are classified by means of an error code Each code is displayed on the green temperature display LC display while the quit key is pressed and the temperature setting button extended Monitor LED display Temperature Display Cause of Trouble defective LC display component Tool wrench Fi Temperature selector defect Tool wrench F2 Air temperature sensor defect Tool wrench F3 Refrigerator sensor defect Tool wrench F4 Heating system defect Tool wrench F5 Refrigeration cycle defect 05 2001 4 599 51 1561 DE Special Features 292 5210 72 Refrigeration Equipment Specific Part 10 4 2 10 4 3 10 4 4 10 4 5 05 2001 Defrost warning Defrost warning responds as soon as the air temperature is heated up to 2 C This warning is displayed both optically and acoustically The highest temperature in the freezer is displayed alternating with the actual temperature You can reset the defrost warning by using the quittance key no automatic reset After reset with the quittance key the highest temperature is no longer on display When starting up the defrost warning is suppressed until display temperature is by 4 K higher than the set point temperature Temperature alarm Temperature alarm is activated once the actual temperature is by 5 K higher than set point temperature You
12. e Fan brown 05 2001 19 599511561 DE
13. e is on display temperature of freezing stock Temperature control Setting the set point temperature with the temperature control button extended You can set the required set point temperature by turning the temperature control button in 1 K steps from 15 C to 24 C Superfrost See 10 2 Forced defrosting manual defrosting Extend the temperature control button Press the acknowledgement key and at the same time press the Superfrost button 10 599511561 DE Special Features 292 5210 54 Refrigeration Equipment Specific Part 9 3 3 Battery mode warning on mains failure The equipment automatically changes over to battery mode if for whatever reasons no mains voltage is applied Control functions are maintained but the compressor is not working Immediately upon mains failure an alarm is activated emitting a signal every 20 sec You can suppress the alarm for a period of 2 hrs by using the acknowledgement key As a substitute optical warnings monitor will be flashing for a period of 10 sec The green equipment on lamp goes off The actual temperature is indicated in the temperature display but not backlit so you cannot read it 9 4 Regulating and control functions 9 4 1 Fan control explanation with logic symbols Switching ON the fan Compressor ON amp Evaporator temperature lt 15 C Le Fan ON AT lt 3 K Switching OFF the fan Compre
14. g lateur fan freezing Ventilateur defrost heating R sistance PTC surg lateur starting PTC freezing R sistance PTC surg lateur defrost water heating surface heating Chauffage rigole eau d givrage freezer evaporator sensor Sonde air ambient partie surg lateur freezer air sensor Sonde air partie surg lateur Farbdefinitionen colour definitions Kleuren Couleurs 05 2001 black schwarz zwart brown braun bruin blue blau blauw yellow gelb geel green grun groen red rot rood white weil wit 599511561 DE Special Features 292 5210 51 Refrigeration All other functions are identical to the former series sections enclosed to this document 9 No frost deep freezers version with power board and logic board 9 1 General This no frost series is equipped with an electronically controlled monitor a microprocessor controlled regulation the no frost air circulation system as well as a child proof lock The vital benefits of this new technology are high temperature constancy in all levels no formation of hair frost on the freezing stock automatic defrosting on demand and the display and control systems Multiple disk evaporator Fan Defrost water channel Air channel rear interior MU 5 Compressor LL 05 2001 8 599511561 DE Special Features 292 5210 52 Refrigeration Equipment Specific Part 9 2 Operation Green equipment on lamp Superfrost key Monitor Operating switch O
15. mand Automatic defrosting takes place after 60 hours of frosting time at the beginning of the next standstill time of the compressor If after 65 hours no standstill period has begun yet the compressor is switched off in order to start a defrosting cycle Frosting time compressor operating time 180 x door opening time The defrosting cycle will be ended 4 min after switching off the heaters Frosting time is set to 0 Switching the heaters ON Defrosting heaters and surface heating are switched ON if either defrosting on demand after 60 hrs frosting time or defrosting on demand is activated and atthe same time the evaporator sensor is OK Switching the heaters OFF Defrosting heaters and surface heating are switched OFF if the temperature at the evaporator sensor is higher than 7 C or since the beginning of the defrosting cycle more than 40 min have passed or the evaporator sensor is in failure 14 599511561 DE Special Features 292 5210 61 Refrigeration Equipment Specific Part 9 6 9 7 9 7 1 9 7 2 05 2001 Self test Within the first 3 minutes after switching ON the electronic system runs a self test Order of sequence For 15 sec all indicators are lit power consumption approx 9 mA For 15 sec pause For 15 sec the fan is switched on power consumption approx 30 mA For 15 sec pause For 15 sec the heaters are switched on power consumption approx
16. s Refrigeration Equipment Specific Part Connection diagram 10 5 Part No 675 092 101 Connection diagram S 33 XE Na Xa Na T TT 8 Vn 8 Cn age At at oe l 1 l p eoq 21607 13 Sy na na e IE Se H H fa 8 Lua p Iech ele ae Loos pyeog Jamod Im l EN A ee ee gt DE 599 51 1561 05 2001 Special Features Refrigeration Equipment Specific Part 10 6 Connection diagram legend C1 E1 F2 F3 G1 H1 H2 M2 M3 R2 R3 R5 R7 R8 Betriebskondensator Kondensator Lampe Lamp Klixon Abtauheizung Klixon ontdooiweerstand Klixon Fl chenheizung Klixon vlakweerstand Batterie Batterij Signallampe gr n Lamp groen Signallampe gelb Lamp geel Motorverdichter Gefrieren Kompressor diepvries Lufter Gefrieren Ventilator Abtauheizung Ontdooiweerstand Anlauf PTC Gefrieren PTC weerstand diepvries Tauwasserheizung Fl chenheizung Dooiwatergootverwarming Gefrierteil Verdampferf hler Verdampervoeler diepvriesgedeelte Gefrierteil Luftfuhler Luchtvoeler diepvriesgedeelte 292 5210 74 running capacitor Condensateur lamp lampe klixon defrost heater Clixon r sistance de degivrage klixon surface heater Clixon r sistance plate battery Batterie signal lamp green Lampe verte signal lamp yellow Lampe jaune motor condenser freezing Compresseur sur
17. ssor OFF amp AT gt 5K At gt 4 min m Fan OFF Door OPEN Defrost ON Evaporator temperature gt 10 C AT Evaporator temperature air temperature At after run time of fan compared with the compressor In case of malfunction of the temperature sensor the fan is switched jointly with the compressor 05 2001 De 599511561 DE Special Features 292 5210 55 Refrigeration Equipment Specific Part 94 2 Fan control system explanation with sentences 9 2 4 1 Switching the fan ON The fan is switched ON if the following three requirements are simultaneously met compressor switched ON compressor relay voltage free temperature at the evaporator sensor R7 below 15 C and by more than 3 K colder than the temperature at the air sensor 9 4 2 2 Switching the fan OFF The fan is switched OFF if one minimum of the following requirements is met temperature at the evaporator sensor is above 10 C or the defrost cycle is reached frosting time 60 hrs or if the door is opened or the fan is running for 4 min longer than the compressor or compressor is switched OFF compressor relay operated and at the same time the temperature at the evaporator sensor is higher by at least 5 K than the temperature at the air sensor 05 2001 12 599511561 DE Special Features 292 5210 57 Refrigeration Equipment Specific Part 9 4 4 9 4 4 2 9 4 4 3 05
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