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Service
Manual Biomedical

freezer

SANYO Electric Biomedical Co., Ltd.

MDF-U333

MDF-U537

MDF-U537D

ＳＭ７２１０１３９

MDF-U537

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Summary of Contents for MDF-U333

Page 1: ...Service Manual Biomedical freezer SANYO Electric Biomedical Co Ltd MDF U333 MDF U537 MDF U537D ＳＭ７２１０１３９ MDF U537 ...

Page 2: ... 168 61 825 168 62 MDF U537D 823 169 51 115V 60Hz 823 169 52 220V 50Hz 823 169 53 220V 60Hz 823 169 54 230V 50Hz 827 169 55 240V 50Hz 823 169 56 240V 50Hz 823 169 57 230V 50Hz 823 169 58 115V 60Hz 823 169 59 110V 60Hz 823 169 60 220V 50Hz 823 169 61 823 169 62 MDF U333 823 170 51 115V 60Hz 823 170 52 220V 50Hz 823 170 53 220V 60Hz 823 170 54 230V 50Hz 823 170 55 240V 50Hz 823 170 56 110V 60Hz 823 ...

Page 3: ...it welding points MDF Ｕ333 16 Refrigeration circuit principle diagram MDF Ｕ537 17 Refrigeration circuit welding points MDF Ｕ537 18 Refrigeration circuit principle diagram MDF Ｕ537D 19 Refrigeration circuit welding points MDF Ｕ537D 20 Electrical Parts 21 Specification of sensor 24 Control specification 25 W iring diagram 34 Circuit diagram 37 Components on P C B 38 Test data 39 Parts loyout 49 User...

Page 4: ...low temperature alarm SV is changeable in the range 5 15 power failure alarm remote alarm terminal setting memorization by non volatile memory Adopt new microprocessor system for display panel and keypad makes operation easily Self diagnosis function Abnormal condition for temperature sensor is indicated by self diagnosis system Validation Control panel enables zero 0 adjust for validation New doo...

Page 5: ...or high low temperature alarm SV is changeable in the range 5 15 power failure alarm remote alarm terminal setting memorization by non volatile memory Adopt new microprocessor system for display panel and keypad makes operation easily Self diagnosis function Abnormal condition for temperature sensor is indicated by self diagnosis system Validation Control panel enables zero 0 adjust for validation...

Page 6: ...Latch 1 pc Door lock 1 pc L 4 pcs Inner dimension W 446 D 369 H 220 mm Basket S 1 pc for bottom column Inner dimension W 487 D 221 H 155mm Accessories Others Defrosting spatula 1 pc key 1 set 4 card holders Caster 4 pcs Leveling legs 2 pcs with caster Access hole φ 30mm 1 place in left side Weights 81 Kg Evaporator Tube on sheet type function both evaporator and shelf Condenser Wire and tube type ...

Page 7: ... alarm contact Remote alarm terminal 3P contact capacity DC30v Max2A N O COM During power failure temperature alarm ON Control panel ALARM lamp BUZZER Buzzer key ALARM TEST Alarm test key SET To switch the SV and PV To shift the set digit To change the SV DEF Defrost key Operation panel Rear Power switch Breaker switch Battery switch Power failure alarm switch Key lock function Press key for five ...

Page 8: ...tment Latch 2 pcs Door lock 1 pc M 6 pcs upper compartment Inner dimension W 290 D 536 H 136 mm Basket S 8 pcs lower compartment Inner dimension W 290 D 536 H 100mm Accessories Others Defrosting spatula 1 pc key 1 set 14 card holders Caster 4 pcs Leveling legs 2 pcs with caster Access hole φ 30mm 1 place on rear Weights 131 Kg Evaporator Tube on sheet type function both evaporator and shelf Conden...

Page 9: ...ure alarm ON Control panel ALARM lamp BUZZER Buzzer key ALARM TEST Alarm test key SET To switch the SV and PV To shift the set digit To change the SV DEF Defrost key Operation panel Rear Power switch Breaker switch Battery switch Power failure alarm switch Key lock function Press key for five seconds L0 Unlock L1 Lock Self diagnosis function When each sensor is in fault Error code and internal tem...

Page 10: ...s upper and lower compartment Latch 2 pcs Door lock 1 pc M 6 pcs upper compartment Inner dimension W 290 D 536 H 136 mm Basket S 8 pcs lower compartment Inner dimension W 290 D 536 H 100mm Accessories Others Defrosting spatula 1 pc key 1 set 14 card holders Caster 4 pcs Leveling legs 2 pcs with caster Access hole φ 30mm 2 places on rear Weights 136 Kg Evaporator Tube on sheet type function both ev...

Page 11: ...ilure temperature alarm ON Control panel ALARM lamp BUZZER Buzzer key ALARM TEST Alarm test key SET To switch the SV and PV To shift the set digit To change the SV DEF Defrost key TOP BOTTOM Switch key to display upper or lower compartment Operation panel Rear Power switch Breaker switch Battery switch Power failure alarm switch Key lock function Press key for five seconds L0 Unlock L1 Lock Self d...

Page 12: ... 9 Dimensions MDF U333 ...

Page 13: ... 10 Dimensions MDF U537 ...

Page 14: ... 11 Dimensions MDF U537D ...

Page 15: ...umns Type Wire and tube Condenser assembly B Dimension w 480 P 40 30 columns Note Lower 2 columns are used in desuper circuit Material C1220T 1 2H Frame pipe Dimension φ 4 0 ｔ0 5 Evacuation and vacuum pressure Evacuation time over than 20min by 2 ports high pressure and low pressure side N2 exchange When charged vacuum pressure is lower than 1 0torr pump capacity 300L min Refrigerant R 134a Charge...

Page 16: ... Wire and tube Condenser assembly front Total number 4 Dimension w 480 P 40 6 columns Material C1220T Frame pipe Dimension φ 4 0 ｔ0 5 L 7470 Evacuation and vacuum pressure Evacuation time over than 20min by 2 ports high pressure and low pressure side N2 exchange When charged vacuum pressure is lower than 1 0torr pump capacity 300L min Refrigerant R 407D Charged q ty 301 5g Oil CF 32 Charged q ty 2...

Page 17: ... indicator color Yellow Red Type Wire and tube Condenser assembly front Total number 4 Dimension w 480 P 40 6 columns Material C1220T Frame pipe Dimension φ 4 0 ｔ0 5 L 7470 Evacuation and vacuum pressure Evacuation time over than 20min by 2 ports high pressure and low pressure side N2 exchange When charged vacuum pressure is lower than 1 0torr pump capacity 300L min Refrigerant R 407D Charged q ty...

Page 18: ... 15 Refrigeration circuit principle diagram MDF U333 ...

Page 19: ... 16 Refrigeration circuit welding points MDF U333 ...

Page 20: ... 17 Refrigeration circuit principle diagram MDF U537 ...

Page 21: ... 18 Refrigeration circuit welding points MDF U537 ...

Page 22: ... 19 Refrigeration circuit principle diagram MDF U537D ...

Page 23: ... 20 Refrigeration circuit welding points MDF U537D ...

Page 24: ...es 5 4A more than 30 minutes 2 5A more than 30 minutes Action 8 0A within 15 minutes 7 4A within 15 minutes 3 4A within 15 minutes Starting capacitor Rating 100μF 160VAC 100μF 160VAC 30μF 300VAC Running capacitor Rating 25μF 220VAC 20μF 220VAC 5μF 400VAC Temp control relay Type G4F 11123T G4F 11123T G4F 11123T Contact capacity AC220V 20A AC220V 20A AC220V 20A Coil DC12V DC12V DC12V Switching power...

Page 25: ... G4F 11123T G4F 11123T Contact capacity AC220V 20A AC220V 20A AC220V 20A Coil DC12V DC12V DC12V Solenoid valve Type G2R 1A T G2R 1A T G2R 1A T control relay Contact capacity AC250V 10A AC250V 10A AC250V 10A Coil DC12V DC12V DC12V Switching power supply Type ZWS10 12 J ZWS10 12 J ZWS10 12 J Input AC100 240V 50 60Hz 0 3A AC100 240V 50 60Hz 0 3A AC100 240V 50 60Hz 0 3A Rated output DC12V 0 85A DC12V ...

Page 26: ... G4F 11123T G4F 11123T Contact capacity AC220V 20A AC220V 20A AC220V 20A Coil DC12V DC12V DC12V Temp control relay Type G2R 1A T G2R 1A T G2R 1A T Contact capacity AC250V 10A AC250V 10A AC250V 10A Coil DC12V DC12V DC12V Switching power supply Type ZWS10 12 J ZWS10 12 J ZWS10 12 J Input AC100 240V 50 60Hz 0 3A AC100 240V 50 60Hz 0 3A AC100 240V 50 60Hz 0 3A Rated output DC12V 0 85A DC12V 0 85A DC12...

Page 27: ... 45 116 50 6 17 16 13 7 85 40 88 85 5 16 43 14 7 55 35 68 15 4 15 74 15 7 27 30 52 84 3 15 08 16 6 99 25 41 19 2 14 45 17 6 73 20 32 43 1 13 86 18 6 48 19 30 92 0 13 29 19 6 24 18 29 50 1 12 74 20 6 01 17 28 14 2 12 22 25 5 00 16 26 87 3 11 72 30 4 18 15 25 65 4 11 25 35 3 51 14 24 51 5 10 80 40 2 96 13 23 42 6 10 37 45 2 51 12 22 39 7 9 96 50 2 14 11 21 41 8 9 57 55 1 83 10 20 48 9 9 20 60 1 57 9...

Page 28: ... is displayed alternately During defrosting high low temperature alarm is cancelled When sensor error is occurred during defrosting error code and internal temperature is displayed alternately and dF display is turned off During defrosting only buzzer key is acceptable ALARM TEST Press the key in PV display alarm test will be start Press again then quit alarm test During alarm test alarm lamp will...

Page 29: ...essing key over 5 seconds to enter function mode F00 Then press key to count up value Change F01 to input high temperature alarm value F02 to input low temperature alarm value Set either F01 or F02 then press SET key to turn alarm temperature setting mode to set required value with key and key Press SET key again to memorize value Out of setting range If change to out of setting range value by mis...

Page 30: ...y E07 with 50 When solenoid valve control sensor is short circuit display shows alternately E08 with 50 c Model code setting for code 003 When TOP lamp is displayed display shows same as a in upper compartment When BOTTOM lamp is displayed display shows lower compartment temperature When lower compartment temperature sensor is open circuit display shows alternately E03 with 50 When lower compartme...

Page 31: ...M key for MDF U537D is available ７７７７ Alarm test The function is to check performance failure for alarm lamp buzzer and remote alarm In PV display press ALARM TEST key to blink alarm lamp to sound buzzer intermittently to turn remote alarm contact on Without time delay Digital display will be turned off During alarm test only ALARM TEST key is available Note During alarm test with buttery switc...

Page 32: ...y temperature of MDF U537 U537D compressor protect sensor per 1 F14 To display temperature of temperature sensor per 0 1 Solenoid valve control sensor for MDF U537 Lower compartment sensor for MDF U537D F15 Not available F16 Not functioned Return to PV display F17 To set or check model code model code 001 MDF U333 model code 002 MDF U537 model code 003 MDF U537D F18 Preset value for second offset ...

Page 33: ... seconds when PCB replacement is done in service It is recommended to input 1 15 for value when PCB is replaced F06 Input service code with key and key when F07 and following functions except F21 F22 and F25 would be performed Press SET key to memorize service code to enter function mode again to perform F07 and following functions Service code 384 Note Service code is memorized unless input 000 a...

Page 34: ...t digit the first decimal place the second digit Ｆ12 Temperature of temperature sensor is displayed as per 0 1 From second digit to first decimal point is shown in display It is not shown in display when temperature is lower than 20 Ex Actual temperature 35 Display shows 35 0 When temperature is within the range of 19 9 0 1 is displayed Range 72 0 83 0 9 9 Ｆ13 Temperature of compressor protect sen...

Page 35: ...as MDF U537 MDF U537D to activate compressor protect function F21 To set serial communication ID Input range 000 255 000 means that communication is OFF F22 To set serial communication mode Control mode 3rd digit 0 Local initial value 1 Remote Baud rate 2nd digit 0 2400bps initial value 1 4800bps 2 9600bps 1st digit is not used Note Set control mode as remote unable to change SV and to activate de...

Page 36: ... 1 0 from PV For upper lower compartment 003 MDF U537D 18 SV 30 shift PV 2 4 18 SV 5 For upper compartment 30 SV shift 0 from PV For upper compartment Note For lower compartment add 0 to PV １３１３１３１３ Display offset In display temperature that is lower than SV is shown for a little time With this case display offset 0 5 should be done Round off numbers to the first decimal point １４１４１４１４ Remot...

Page 37: ... 34 Wiring diagram ...

Page 38: ... 35 ...

Page 39: ... 36 ...

Page 40: ... 37 Circuit diagram Main PCB ...

Page 41: ... 38 Components on PCB Main PCB ...

Page 42: ...emperature uniformity and fluctuation 42 ＭＤＦＵ５３７ Pull down 43 ＭＤＦＵ５３７ Pull up 43 ＭＤＦＵ５３７ Cooling unit pressure 44 ＭＤＦＵ５３７ Power consumption 44 ＭＤＦＵ５３７D Pull down 45 ＭＤＦＵ５３７D Pull down 45 ＭＤＦＵ５３７D Pull up 46 ＭＤＦＵ５３７D Cooling unit pressure 47 ＭＤＦＵ５３７D Power consumption 47 ＭＤＦＵ５３７ D Temperature uniformity and fluctuation 48 ...

Page 43: ... Ｕ３３３ Pull down 40 30 20 10 0 10 20 30 40 0 2 4 6 8 10 Time scale H Internal temperature 50Hz 60Hz ＭＤＦＵ３３３ Pull up 40 30 20 10 0 10 20 0 2 4 6 8 Time scale H Internal temperature AT35 no load AT35 無負荷 40 ...

Page 44: ...200 250 0 1 2 3 4 5 6 7 Time scale ｈ Power consumption Ｗ W 50Hz W 60Hz ＭＤＦＵ３３３ Cooling unit pressure 0 200 400 600 800 1000 1200 1400 1600 0 1 2 3 4 5 6 7 Time scale ｈ Pressure kPa Pd 50Hz Ps 50Hz Pd 60Hz Ps 60Hz AT35 no load AT35 no load 41 ...

Page 45: ...formity Max Min 21 8 24 6 Range deg 2 8 1 4 ２ＳＶ２０ Temperature Fluctuation Top 17 1 18 3 Middle 19 1 2 6 19 4 Bottom 19 0 Uniformity Max Min 17 1 19 4 Range deg 2 3 1 15 ３ＳＶ３０ Temperature Fluctuation Top 26 3 28 1 Middle 29 3 1 7 29 4 Bottom 29 1 Uniformity Max Min 26 3 29 4 Range deg 3 2 1 6 note These data are reference only Measuring point 1 2 3 1 2 center air 4 5 Measuring point Measuring p...

Page 46: ...Pull down 40 30 20 10 0 10 20 30 40 0 2 4 6 8 10 12 Time scale H Internal temperature 50Hz 60Hz ＭＤＦＵ５３７ Pull up 40 30 20 10 0 10 20 0 2 4 6 8 10 Time scale H Internal temperature AT 35 no load AT 35 no load 43 ...

Page 47: ... 0 500 1000 1500 2000 0 2 4 6 8 10 12 Time scale H Pressure kPa Pd 60Hz Ps 50Hz Pd 60Hz Ps 60Hz ＭＤＦＵ５３７ Power consumption 0 100 200 300 0 2 4 6 8 10 12 Time scale H Power consumption W W 50Hz W 60Hz AT 35 no load AT 35 no load 44 ...

Page 48: ...0 40 0 2 4 6 8 10 12 Time scale H Internal temperature Top chamber Bottom chamber ＭＤＦＵ５３７Ｄ Pull down 40 30 20 10 0 10 20 30 40 0 2 4 6 8 10 12 Time scale H Internal temperature Top chamber Bottom chamber AT35 50Hz no load AT35 60Hz no load 45 ...

Page 49: ...ＭＤＦＵ５３７Ｄ Pull up 40 30 20 10 0 10 20 30 0 2 4 6 8 10 Time scale H Internal temperature AT35 no load Top chamber Bottom chamber 46 ...

Page 50: ...0 1000 1500 2000 2500 0 2 4 6 8 10 12 Time scale H Pressure kPa Pd 50Hz Ps 50Hz Pd 60Hz Ps 60Hz ＭＤＦＵ５３７Ｄ Power consumption 0 100 200 300 400 500 0 2 4 6 8 10 12 Time scale H Power consumption W W 50Hz W 60Hz AT35 no load AT35 no load 47 ...

Page 51: ...2 8 27 8 19 9 24 1 29 7 2 5 2 6 3 9 2 0 1 4 1 5 MDF U537D SV 20 SV 25 SV 30 17 7 22 4 27 4 19 9 25 1 30 1 18 8 24 9 30 8 19 8 24 9 30 2 2 2 2 7 3 4 3 1 2 1 0 9 22 4 25 8 29 8 21 3 25 3 29 5 20 5 25 8 30 4 17 9 23 3 28 1 21 7 26 2 30 4 4 5 2 5 2 3 3 2 2 6 1 3 note These data are reference only 1 2 Measuring point 3 4 5 6 7 8 Uniformity deg Fluctuaation Measuring point Uniformity deg Fluctuaation 1 ...

Page 52: ... Memorandum ...

Page 53: ...oduct Door latch Remote alarm terminal Breaker switch Inner parts of door latch Temperature control sensor MDF Ｕ５３７ Temperature control sensor for upper chamber MDF Ｕ５３７D Solenoid valve control sensor MDF Ｕ５３７ Temperature control sensor for lower chamber MDF Ｕ５３７D Connecter for tenperature recorder power sourece ＭＤＦＵ５３７ＭＤＦＵ５３７ＭＤＦＵ５３７ＭＤＦＵ５３７ Parts layout 49 ...

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