Sanyo MDF-U53V Service Manual

Sanyo MDF-U53V Service Manual

Ultra-low temperature freezer
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Service Manual
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.)
* You are requested to use RoHS compliant parts for maintenance or repair.
* You are requested to use lead-free solder.
Ultra-Low Temperature Freezer
SANYO Electric Co., Ltd.
Biomedical Business Unit


Table of Contents

Summary of Contents for Sanyo MDF-U53V

  • Page 1 FILE No. Ultra-Low Temperature Freezer MDF-U53V MDF-U53VC SANYO Electric Co., Ltd. Biomedical Business Unit 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 Following units are effective in this manual. Model name Product code Voltage and Frequency MDF-U53V 823 190 51 220V 50Hz 823 190 52 220V 60Hz 823 190 53 220V 60Hz 823 190 54 230/240V 50Hz 823 190 55...
  • Page 3: Table Of Contents

    Contents Page Comparison MDF-U53V with MDF-U52V --------------------------------------- Specifications --------------------------------------------- * Structural specifications * Control specifications * Performance specifications Dimensions ---------------------------------------------- Refrigeration circuit --------------------------------------------------- Refrigeration circuit welding points ---------------------------------------------- Cooling unit parts ---------------------------------------------- Components on PCB ---------------------------------------------- Electrical parts ---------------------------------------------- Specifications of sensor...
  • Page 4: Comparison Mdf-U53V With Mdf-U52V

    Comparison MDF-U53V with MDF-U52V Item MDF-U52V MDF-U53V Remarks Compressor Sanyo Toshiba career Toshiba compressor has been cooperated development. H stage side 1100W 1100W L stage side 1100W 1100W Filter alarm FILTER lamp is lit FILTER lamp is lit and buzzer sounds intermittently 2.8yrs, battery accumulating...
  • Page 5: Specifications

    Specifications Structural specifications Item MDF-U53V MDF-U53VC Name Ultra-low Temperature Freezer External dimensions W770 × D875 × H1990 (mm) Internal dimensions W630 × D600 × H1400 (mm) Effective capacity 519 L Outer door 1door, painted steel Inner door 2doors, ABS resin panel with stainless frame...
  • Page 6 Control specifications Item MDF-U53V MDF-U53VC Temp. controller Microcomputer control system Temperature setting range: -50°C∼-90°C Non-volatile memory Thermal sensor Pt.1000 Temperature display Digital display +5°C~+20°C for High temperature alarm (Initial; +10°C) -5°C~-20°C for Low temperature alarm (Initial; -10°C) Temperature ALARM lamp blinks and buzzer sounds intermittently with 15min. delay Remote alarm contact;...
  • Page 7 Performance specifications Cooling performance -86°C at the center of the chamber (AT30°C, no load) Temperature control range -50°C~-86°C(AT30°C, no load) Power source 220V, 50Hz 220V, 60Hz 230V, 50Hz 240V, 50Hz Rated power consumption 1020W 1180W 1070W 1150W Noise level 49 dB {A} (background noise 20dB) Maximum pressure 2600 kPa Usable conditions...
  • Page 8 Dimensions...
  • Page 10: Refrigeration Circuit Welding Points

    Refrigeration circuit welding points < Unit Base Ass’y > Condenser Ex. tank L Compressor H Compressor L Oil separator Dryer H...
  • Page 11: Cooling Unit Parts

    Cooling unit parts <MDF-U53V/U53VC> Specifications Item H side L side Compressor 220V, 60Hz 220V, 50Hz 230/240V, 50Hz Code 7FB-0-M101-001-06 7FB-0-M101-001-04 7FB-0-M101-001-05 Type KS370J1NS-7A KS370J1NS-4A KS370J1NS-4A1 Ze-NIUS32SA Ze-NIUS32SA Refrigerant oil Charged q’ty: 850cc Charged q’ty: 850cc Forced air cooling partially Forced air cooling partially...
  • Page 12: Components On Pcb

    Components on PCB...
  • Page 13: Electrical Parts

    Electrical Parts MDF-U53V/U53VC 220VAC, 60Hz 220VAC, 50Hz 230/240VAC, 50Hz Type KS370J1NS-7A KS370J1NS-4A KS370J1NS-4AI Compressor (H),(L) Code 7FB-0-M101-001-06 7FB-0-M101-001-04 7FB-0-M101-001-05 Rated voltage (50/60Hz) 220V, 60Hz 220/230V, 50Hz 230/240V, 50Hz Winding resistance C-S(Aux) 1.64 2.53 2.53 C-R(Main) 3.35 Type AMVL-300A AMVL-300A AMVL-300A...
  • Page 14: Specifications Of Sensor

    Specifications of sensor The following shows the temperature in thermal sensor (502AT-1) and its resistance value. Resistance Resistance Resistance Resistance Temp. Temp. Temp. Temp. Value (k ) Value (k ) Value (k ) Value (k ) 154.5 71.80 35.65 13.29 145.9 68.15 33.99...
  • Page 15: Connections On Pcb

    Connections on PCB The following shows the connections of connectors on the Temp. controller PCB. Connector Connects to Usage Switching power supply To supply the power to PCB. Network interface To connect to MTR-480 option Remote alarm terminal Remote alarm contact outputs. #1: COM.
  • Page 16: Wiring Diagram

    Wiring Diagram...
  • Page 18: Circuit Diagram

    Circuit Diagram...
  • Page 19: Control Specifications

    Control specification Key and Switch BUZZER In alarm condition, buzzer stops sounding with this key pressed. Remote alarm output and alarm message would not be off. During the power failure (battery back-up), press the key to show the present temperature of PT sensor. ALARM TEST With this key pressed to activate alarm test mode to be forcibly step into alarm condition (ALARM lamp blinks, intermittent buzzer beeps, digital LED...
  • Page 20 B) Function mode Setting range : 00~32 Display range 00~39 00, 16 and 33~39 are unavailable. Setting procedure : In PV display, keep pressing key over 5 seconds to enter function mode (F00 is displayed). Change the blinking 1 digit to desired function code with key and key.
  • Page 21 Battery accumulating F03: Battery accumulating time is displayed. time (Ex. 2years and 6months consumed displayed as ‘02.5’) The display shows ’02.8’ to inform the battery exhaustion. Replace with new battery. <Reset of accumulating time> Step into F06. Input ‘409’ and press SET key to turn the display to ’00.0’...
  • Page 22 F26 * Display of actual operation rate F27 * Display of calculated running rate F28 * Display of delay time of permission for measuring running rate (2 hrs timer) F29 * Display of delay time of permission for measuring running rate (8 hrs timer) F30 * ROM version is displayed F31 *...
  • Page 23 Press SET key to store and revert to PV display. Model code ‘007’: MDF-U53V/U53VC F18: <Purpose> To turn capillary heater forcibly on (or off) <Operation> Service code should be input in F06 prior to use this mode.
  • Page 24 Press SET key to store the value and revert to PV display. Control mode (the 3 digit) 0: Local (initial) 1: Remote Baud rate (the 2 digit) 0: 2400bps (initial) 1: 4800bps 2: 9600bps Note) You cannot be changed SV if control mode is set in “Remote”. F23: <Purpose>...
  • Page 25 F31: <Purpose> Buzzer setting during filter alarm <Operation> Input F31 and press SET key to display “001” (initial). Change to the desired value with key and key. Press SET key to revert to PV display. 000: Buzzer off 001: Buzzer on F32: <Purpose>...
  • Page 26 (3) Filter sensor Open circuited: E05 and PV are displayed alternately, the buzzer beeps intermittently and remote alarm contact outputs. Press BUZZER key to stop the buzzer beeping. Short circuited: E06 and PV are displayed alternately, the buzzer beeps intermittently and remote alarm contact outputs.
  • Page 27 Other specifications (1) Lamp specifications: <Control PCB> DP1: Orange lamp Goes off: High/low temp. alarm, sensor failure, power failure : Not in alert condition DP2: Green lamp Goes off: Compressor L turns off. (normal condition) : Compressor L turns on. DP3: Red lamp Goes off: Capillary heater turns off.
  • Page 28: Parts Layout

    Parts layout Control panel Latch 'Open' Door latch Handle Inner door handle Fan motor Boost BOX (MDF-U53VC only) Power transformer (MDF-U53VC only) Filter sensor...
  • Page 29 <Grille> Filter AT sensor Power switch <Electrical BOX> 12P terminal Remote alarm Main PCB Switching power supply Running capacitor H Starting capacitor H Running capacitor L Starting capacitor L...
  • Page 30: Test Data

    Test data...
  • Page 32: Temperature Uniformity

    Temperature Uniformity MDF-U53V Reference Condition: SV-80 AT30 Load: No load Measuring point: Center...
  • Page 33: Sample Load Test

    <Sample load test> Test conditions: 500ml water x 60 bottles (30L in total) Measuring point: a, b, c and d as figure shows 500ml x 60bottles (30L in total) Upper: 500ml x 15bottles Middle: 500ml x 15bottles Lower: 500ml x 15bottles Bottom: 500ml x 15bottles (Front view)
  • Page 34 MDF-U53V Temperature after the unit reaches at -80 Heva out Leva out time(min) Sample load test (SV-50) Leva out Heva out...
  • Page 35 Instruction manual This section is extracted and printed from Instruction Manual. If you find out “Refer to page ” in them, this page means not page in Service manual but page in the lower corner of each page in the extract from Instruction manual. This page number is not corresponded with serial number in Service manual.
  • Page 36: Instruction Manual

    INSTRUCTION MANUAL MDF-U73V MDF-U73VC MDF-U53V Ultra-Low Temperature Freezer MDF-U53VC MDF-U73V/MDF-U73VC...
  • Page 38: Introduction

    Contact Sanyo sales representative or agent if any page of the manual is lost or page order is incorrect. Contact Sanyo sales representative or agent if any point in this manual is unclear or if there are any inaccuracies.
  • Page 39: Precautions For Safe Operation

    PRECAUTIONS FOR SAFE OPERATION It is imperative that the user complies with this manual as it contains important safety advice. Items and procedures are described so that you can use this unit correctly and safely. If the precautions advised are followed, this will prevent possible injury to the user and any other person.
  • Page 40 PRECAUTIONS FOR SAFE OPERATION WARNING Do not use the unit outdoors. Current leakage or electric shock may result if the unit is exposed to rain water. Only qualified engineers or service personnel should install the unit. The installation by unqualified personnel may cause electric shock or fire. Install the unit on a sturdy floor and take an adequate precaution to prevent the unit from turning over.
  • Page 41 PRECAUTIONS FOR SAFE OPERATION WARNING Ensure you do not inhale or consume medication or aerosols from around the unit at the time of maintenance. These may be harmful to your health. Never splash water directly onto the unit as this may cause electric shock or short circuit. Never put containers with liquid on the unit as this may cause electric shock or short circuit when the liquid is spilled.
  • Page 42 PRECAUTIONS FOR SAFE OPERATION CAUTION Use a dedicated power source (a dedicated circuit with a breaker) as indicated on the rating label attached to the unit. A branched circuit may cause fire resulting from abnormal heating. Connect the power supply plug to the power source firmly after removing the dust on the plug. A dusty plug or improper insertion may cause a heat or ignition.
  • Page 43: Environmental Conditions

    ENVIRONMENTAL CONDITIONS This equipment is designed to be safe at least under the following conditions (based on the IEC-1010-1): Indoor use; Altitude up to 2000 m; Ambient temperature 5 C to 40 Maximum relative humidity 80% for temperature up to 31 C decreasing linearly to 50% relative humidity at 40 Mains supply voltage fluctuations not to exceed...
  • Page 44: Freezer Components

    FREEZER COMPONENTS 5 (inside) 15 (inside)
  • Page 45 FREEZER COMPONENTS 1. Outer door: To open the door, grip the handle. On closing, lock the door latch completely. 2. Handle: Always grip this handle to open and close the outer door. 3. Door latch: Always lock the latch when the outer door is closed. 4.
  • Page 46: Control Panel

    When this lamp lights, clean the condenser filter following the procedure on page 22. 10. Battery check lamp (BATTERY): This lamp lights to recommend the battery replacement. This lamp blinks when a fan motor is maintained. For the replacement, consult Sanyo sales representative or agent.
  • Page 47: Installation Site

    INSTALLATION SITE To operate this unit properly and to obtain maximum performance, install the unit in a location with the following conditions: 1. A location not subjected to direct sunlight Installation in a location subjected to direct sunlight may lead to inadequate cooling. 2.
  • Page 48: Installation

    INSTALLATION 1. Remove the packaging materials and tapes Remove all transportation packaging materials and tapes. Open the doors and ventilate the unit. If the outside panels are dirty, clean them with a diluted neutral dishwashing detergent. (Undiluted detergent can damage the plastic components. For the dilution, refer to the instruction of the detergent.) After the cleaning with the diluted detergent, always wipe it off with a wet cloth.
  • Page 49: Start-Up Of Unit

    START-UP OF UNIT Follow the procedures for the initial and consequent operations of the unit. 1. Connect the power cord to the dedicated outlet having appropriate rating with the chamber empty, and turn on the power switch on the freezer. 2.
  • Page 50: Chamber Temperature Setting

    CHAMBER TEMPERATURE SETTING Table 1 shows the basic procedure for setting the chamber temperature. Perform key operations in the sequence indicated in the table. The example in the table is based on the assumption that the desired temperature is -75 Note: The unit is set at the factory that the chamber temperature -80 Table 1.
  • Page 51: Alarm Temperature Setting

    ALARM TEMPERATURE SETTING This unit is provided with the high and low temperature alarm and the temperature at which the alarm is activated is changeable. The following procedure shows the setting of alarm temperature according to the condition below: High temperature alarm: activates at the temperature 5 C higher than the set temperature Low temperature alarm: activates at the temperature 5 C lower than the set temperature...
  • Page 52: Setting Of Alarm Resume Time

    SETTING OF ALARM RESUME TIME The alarm buzzer is silenced by pressing buzzer stop key (BUZZER) on the control panel during alarm condition (The remote alarm is not silenced). The buzzer will be activated again after certain suspension if the alarm condition is continued. The suspension time can be set by following the procedure shown in the Table 6 below.
  • Page 53: Remote Alarm Terminal

    REMOTE ALARM TERMINAL The terminal of the remote alarm is installed at the lower left side of the unit. The alarm is outputted from this terminal. Contact capacity is DC 30 V, 2 A. Contact output: between COM. and N.O. between COM.
  • Page 54: Monitor Of Freezer Status

    MONITOR OF FREEZER STATUS The freezer has a function to monitor the running status of the unit as shown in table 7 below. This is to notice the running status getting worse (not failure). 1. The status monitor lamp is lit when one of the running status shown in table 7 is detected. 2.
  • Page 55: Change Of Compressor Delay Time

    CHANGE OF COMPRESSOR DELAY TIME The delay time of high and low stage side compressor can be changed to reduce the load on the power line and to facilitate the start-up (reset) of the freezer after power failure. The example in the table is based on the assumption that the delay time is changed to 4 minutes. (The delay time is set in 2 minutes at the factory.) Note: •...
  • Page 56: Change Of Door Alarm Delay Time

    CHANGE OF DOOR ALARM DELAY TIME The buzzer of door alarm is activated with 2 minutes delay when the door is open. The delay time is changeable. Follow the procedure in table 9 below to change the setting of delay time. The procedure assumes that the delay time is changed from 2 minutes to 3 minutes.
  • Page 57: Alarms & Safety Functions

    ALARMS & SAFETY FUNCTIONS This unit has the alarms and safety functions shown in Table 5, and also self diagnostic functions. Table 5. Alarms and safety functions Alarm & Safety Situation Indication Buzzer Safety operation If the chamber temperature is higher High temperature than the temperature at which the alarm...
  • Page 58: Routine Maintenance

    ROUTINE MAINTENANCE WARNING Always disconnect the power supply to the unit prior to any repair or maintenance of the unit in order to prevent electric shock or injury. Ensure you do not inhale or consume medication or aerosols from around the unit at the time of maintenance.
  • Page 59: Defrosting Of Inside Wall

    ROUTINE MAINTENANCE Defrosting of inside wall The frost is built at the upper portion of the chamber and inner door. The excessive frost possibly make some gap between the cabinet and door gasket, which may cause poor cooling. Remove the frost on the inner door with a scraper enclosed with the unit.
  • Page 60: Troubleshooting

    Note: If the malfunction is not eliminated after checking the above items, or the malfunction is not shown in the above table, contact Sanyo sales representative or agent.
  • Page 61: Replacement Of Battery

    REPLACEMENT OF BATTERY Location of a nickel-metal-hydride battery This unit is provided a nickel-metal-hydride battery for the power failure warning device. The battery is located in the electrical box inside the cover on the lower left side. (Fig. 1) The high voltage components are enclosed in the electrical box. The cover should be removed by a qualified engineer or a service personnel only to prevent the electric shock..
  • Page 62: Disposal Of Unit

    DISPOSAL OF UNIT WARNING If the unit is to be stored unused in an unsupervised area for an extended period ensure that children do not have access and doors cannot be closed completely. The disposal of the unit should be accomplished by appropriate personnel. Always remove doors to prevent accidents such as suffocation.
  • Page 63 Waste Electrical and Electronic Equipment (WEEE) Directive-2002/96/EC (English) Your SANYO product is designed and manufactured with high quality materials and components which can be recycled and reused. This symbol means that electrical and electronic equipment, at their end-of-life, should be disposed of separately from your household waste.
  • Page 64 DISPOSAL OF UNIT (French) Votre produit Sanyo est conçu et fabriqué avec des matèriels et des composants de qualité supérieure qui peuvent être recyclés et réutilisés. Ce symbole signifie que les équipements électriques et électroniques en fin de vie doivent être éliminés séparément des ordures ménagères.
  • Page 65 Por favor, ajude-nos a conservar o ambiente em que vivemos! (Italian) Il vostro prodotto SANYO è stato costruito da materiali e componenti di alta qualità, che sono riutilizzabili o riciclabili. Prodotti elettrici ed elettronici portando questo simbolo alla fine dell’uso devono essere smaltiti separatamente dai rifiuti casalinghi.
  • Page 66 Alstublieft help allen mee om het milieu te beschermen. (Swedish) Din SANYO produkt är designad och tillverkad av material och komponenter med hög kvalitet som kan återvinnas och återanvändas. Denna symbol betyder att elektriska och elektroniska produkter, efter slutanvändande, skall sorteras och lämnas separat från Ditt hushållsavfall.
  • Page 67: Temperature Recorder (Option)

    TEMPERATURE RECORDER (OPTION) An automatic temperature recorders is available for this freezer as the optional component. The type of the recorder is MTR-G85. Following shows the attachment procedure. 1. Remove four screws on the front panel and take it off. By removing four screws, take off the left side panel.
  • Page 68: Back-Up System (Option)

    BACK-UP SYSTEM (OPTION) WARNING As with any equipment that uses CO gas, there is a likelihood of oxygen depletion in the vicinity of the equipment. It is important that you assess the work site to endure there is suitable and sufficient ventilation.

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