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Sanyo MDF-137 Service Manual

Biomedical freezer
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Service Manual
RoHS
This product does not contain any hazardous substances prohibited by the RoHS Directive.
(You will find 'RSF' mark near the rating plate on the RoHS compliant product.)
WARNING
* You are requested to use RoHS compliant parts for maintenance or repair.
* You are requested to use lead-free solder.
Biomedical Freezer
MDF-137
FILE No.
SANYO Electric Co., Ltd.
Biomedical Business Division
SM9910202

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  • Page 1 Service Manual FILE No. Biomedical Freezer MDF-137 SANYO Electric Co., Ltd. Biomedical Business Division RoHS This product does not contain any hazardous substances prohibited by the RoHS Directive. (You will find ‘RSF’ mark near the rating plate on the RoHS compliant product.) WARNING * You are requested to use RoHS compliant parts for maintenance or repair.
  • Page 2 Effective models This service manual is effective following models. Model name Product code Voltage and Frequency MDF-137 823 016 54 220-240V 50Hz...
  • Page 3: Table Of Contents

    Contents F e a t u r e s - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - S p e c i f i c a t i o n s - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - S t r u c t u r a l s p e c i f i c a t i o n s...
  • Page 4: Features

    Features Cooling performance New compressor realizes chamber temperature can maintain -30 at least when ambient temperature is 35 . Environment conscious HFC refrigerant, R-134a is adopted. CP urethane foaming is adopted for frame insulation. Better reliability for storage Various function modes are added by flash memory. Battery age is informed by counting battery accumulation time.
  • Page 5: Specifications

    Specifications Structural specifications Item Specifications Name Biomedical Freezer Model MDF-137 External dimensions W640 x D687 x H881 mm Internal dimensions W525 x D440 x H715 mm Effective capacity 138 L Exterior Painted steel Interior Colored aluminum plate Insulation Rigid polyurethane foamed-in place...
  • Page 6: Control Specifications

    Control specifications Item Specifications Microcomputer input by keypad Temp. controller Setting range: -18 increment Non-volatile memory Temp. sensor Thermistor sensor LED digital display (1 increment) Temp. display Display range: -50 Set temperature 5 +15 , changeable Default: +10 ALARM lamp blinks and buzzer sounds intermittently High temp.
  • Page 7: Dimensions

    Dimensions...
  • Page 8: Cooling Unit Parts

    Cooling unit parts MDF-137 Parts name Specifications Compressor Type FL1568-SP Compressor cord 7FB-2-M101-010-03 Rated power supply Single phase, 220~240V, 50Hz Charged q ty: 310±10ml Cooling method Natural air circulation PGR0SAT Overload relay 2.0C36C3 Starting capacitor 60µF-300VAC Running capacitor ----- Evaporator...
  • Page 9: R E F R I G E R A T I O N C I R C U I T

    Refrigeration circuits Condenser Frame pipe Dryer Pre condenser Capillary tube Compressor Point to evacuate...
  • Page 10: Components On Pcb

    Components on PCB...
  • Page 11: Connections On Pcb

    Connections on PCB Connectors on Temp. control PCB Connector Connects to Usage Switching power supply To supply the power to PCB 1 +12VDC 3 GND MTR-480 Option Remote alarm terminal Output for remote alarm contact 1 COM Open between #1 and #2 when the power is supplied in normal condition.
  • Page 12: Electric Parts

    Electric parts MDF-137 220~240V, 50Hz Compressor Type FL1568-SP Compressor cord 7FB-2-M101-010-03 Rating 220~240V, 50Hz Winding resistance(25 ) C-R 11.4 19.5 Type PGR0SAT Resistance 25 33 6.6 O.L. relay Type 2.0C36C3 Action to the temp. ON:130 OFF:60 Action to the current (AT25 ) 7.6 A...
  • Page 13: S P E C I F I C A T I O N S O F S E N S O

    Specifications of sensor Type: 502AT-1 154.5 71.80 35.65 13.29 145.9 68.15 33.99 10.80 137.8 64.71 32.43 8.84 130.2 61.48 30.92 7.20 123.1 58.43 29.50 6.01 116.5 55.55 28.14 5.00 110.2 52.84 26.87 4.17 104.4 50.23 25.65 3.50 98.87 47.77 24.51 2.96 93.70 45.45...
  • Page 14: W I R I N G D I A G R A

    Wiring Diagram...
  • Page 16: C O N T R O L S P E C I F I C A T I O N

    Control specifications Keys and Switches BUZZER When alarm lamp blinks and buzzer sounds, buzzer and remote alarm output ……… Forced to be turned off Buzzer is not turned off during alarm test. When alarm lamp blinks and buzzer is turned off, buzzer never activates. In power failure, press the key to display the current temperature for 5 seconds.
  • Page 17 Function mode Setting range 0~50 Display range 0~59 Note) 04, 08, 13, 15, 16, 18~20, 26~29, 31, 33~49 are unused. Setting process In chamber temperature display, press key for 5 seconds to enter into Function mode with ‘F00’ display. Change the 1 digit with key and key.
  • Page 18 Power failure alarm : When power switch is off position or power is not supplied for 3 seconds with battery switch ON, ALARM lamp blinks, buzzer sounds intermittently and remote alarm activates. When the power is retrieved within 3 seconds since the power failed, the apparatus restarts with initial operation.
  • Page 19 Function mode Function modes are as follow. F00: Automatically return to chamber temperature display F01: Setting of temperature for high temperature alarm F02: Setting of temperature for low temperature alarm F03: Display of Battery accumulation period F05: Setting of compressor delay time F06: Service code input (384) F07: Temperature Zero calibration F12: Display of temperature in temperature sensor (The decimal point is displayed)
  • Page 20 It is not shown “-“ (minus) when the temperature is lower than -20.0 . (Ex. Actual temp -20.5 Display shows as ‘20.5’) F17: Setting of model code (001: MDF-137) In “F17” displayed, press SET key to display model code ‘001’. Press SET key again to memorize the value.
  • Page 21 F21: Serial communication ID setting (Range: 000~255) Input F21 and press SET key to display ‘000’ (default value). Press SET key to memorize the value and return to chamber temperature display. <Serial communication data> Data Display value Chamber temperature : -73.3 ~ +78.4 Temperature in comp.
  • Page 22 F50: Setting of temperature alarm delay time Input F50 and press SET key to display ‘015’ (default setting). Change to your required setting by key and key. Range: 000~015 Press SET key to memorize the value and revert to chamber temperature display. 000: Not delayed Compressor operation for temperature control When chamber temperature is equal to set temperature...
  • Page 23: I N S T A L L A T I O N O F C O M P R E S S O R T E R M I N A L C O V E

    Examples of display Chamber temp. -29.5 Decimal point of chamber temp. -80.0 Set temp. -30.0 Sensor offset -4.9 Function code Error Service code Key Lock Set value Buzzer tone Intermittent tone: In alarming condition Click tone : In key operation In memorize setting value Continuous tone: Ineffective setting value...
  • Page 24 Installation of compressor terminal cover Fixing bar Hang fixiing bar on the both holes of the terminal. Then move the bar to the right side. Terminal cover Upsid Put lead wires into the terminal cover. Connect PTC and OLR with the specified color lead wires.
  • Page 25 Violet Terminal cover (Partially cut for explanation) L.blue Squarish hole Projection of Terminal cover Blue Fit PTC with terminal cover. Put the projection of terminal cover in the squarish hole (See picture (4)) Inside of terminal cover...
  • Page 26 Mount terminal cover on compressor terminal. Move the fixing bar back to original position and fix the bar on 2 projections with a snap. Projection *** For the removal of terminal cover, follow the above process vice versa.
  • Page 28 Temperature control sensor (Loaded) Temperature control sensor cover Load Line Entrance of temperature control sensor Bend Temperature control sensor on the back to attach load with it Temperature control sensor connector insert Access port (for recorder sensor) Lock Connection terminal for Recorder (with socket)
  • Page 29 Remote alarm Battery SW Power SW Terminal for MTR-480 (Option) Remote alarm Battery SW Battery DP1 is lit in power failure alarm DP2 is lit when compressor is operating...
  • Page 30: T E S T D A T

    Test data * All the data are the reference only. AT35 Pull-down & Pull-up Temperture 1/2H 220V 1/2H 230V 1/2H pullup Time[hour] AT35 Pull-down Pressure Pd (220V) Pd (230V) Ps (220V) Ps (230V) Time[hour] AT35 Pull-down Power consumption Input 220V Input 230V Current...
  • Page 31 Temperature Uniformity data (15points measured) *All the data are the reference only.
  • Page 32 Conditions Ambient temperature: 20/30 Load: Unloaded Amount of power consumption Distribution data Temperature of the cycle in each area (SV=-30 air temperature) Amount of power consumption when driving at cycle Unit: (SV=-30 Ambient temperature 20 Unit kWh/day 220V50Hz 230V50Hz Ambient temp 20 Ambient temp 30 Middle of Middle of...
  • Page 33 Amount of power consumption Distribution data Temperature of the cycle in each area (SV=-20 air temperature) Amount of power consumption when driving at cycle Unit: (SV=-20 Ambient temperature 20 Unit kWh/day 220V50Hz 230V50Hz Ambient temp. 20 Ambient temp. 30 Middle of Middle of 50Hz 50Hz...