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Sanyo MDF-U500VX Service Manual
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Sanyo MDF-U500VX Service Manual

Ultra-low temperature freezer
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Service Manual
Ultra-Low Temperature Freezer
MDF-U500VX
MDF-U500VXC
FILE No.
SANYO Electric Co., Ltd.
Biomedical Business Division
SM9910229

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Summary of Contents for Sanyo MDF-U500VX

  • Page 1 Service Manual FILE No. Ultra-Low Temperature Freezer MDF-U500VX MDF-U500VXC SANYO Electric Co., Ltd. Biomedical Business Division SM9910229...
  • Page 2 This service manual is effective for following models. Model name Product code Voltage and Frequency 823 015 52 220V 50Hz 823 015 53 220V 60Hz MDF-U500VX 823 015 54 230V 50Hz 823 015 55 220V 50Hz MDF-U500VXC 823 015 81 220V...
  • Page 3 Contents P a g e 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 - C o n t r o l s p e c i f i c a t i o n s - P e r f o r m a n c e s p e c i f i c a t i o n s...
  • Page 4 Specifications Structural specifications Item MDF-U500VX / MDF-U500VXC Name Ultra-Low Temperature Freezer External dimensions W770 × D870 × H1990 (mm) Internal dimensions W630 × D600 × H1400 (mm) Effective capacity 519 L Exterior Painted steel Interior Painted steel Outer door 1, Painted steel...
  • Page 5 Control specifications Item MDF-U500VX / MDF-U500VXC Temp. controller Micro-processor control system Setting range; -50 Unit;1 Non-volatile memory Temp. sensor Platinum resistance; Pt.1000 LED digital display (Unit; 1 ) Temp. display Display: time, date (Back-up by battery during power failure) Setting range: +5 ~+20 (Initial;...
  • Page 6 Item MDF-U500VX / MDF-U500VXC Activates on LED digital display. Key Lock function Password is settable. In the event of any failure among temp. sensor, AT sensor, Comp. Self diagnosis function sensor, message is displayed, intermittent buzzer beeps and remote alarm activates.
  • Page 7 Dimensions - 4 -...
  • Page 8 Cooling unit parts Specification Parts description A circuit Left side at rear view B circuit Right side at rear view Compressor For 220V, 50Hz* Type KS370J1NS-4A KS370J1NS-4A Compressor cord 7FB-0-M101-001-04 7FB-0-M101-001-04 Single phase, 220/230V, 50Hz Single phase, 220/230V, 50Hz Rated power supply Refrigeration oil Ze-NIUSL22SA Q ty:850cc Ze-NIUSL22SA Q ty:850cc...
  • Page 9 Refrigeration circuit EX tank Evaporator Compressor Cap.tube (EX) Cascade condenser Dryer Frame pipe Pre-condenser Cap.tube Shunt B circuit Condenser Cap.tube Condenser A circuit Shunt Dryer Cap.tube Pre-condenser Frame pipe Cascade condenser Cap.tube Cap.tube (EX) Compressor Evaporator EX tank...
  • Page 10 Components on PCB CN84 #6-#9 To LCD PCB #1-#2 To AT sensor #3-#4 To Comp.sensor A #5-#6 To Comp.sensor B CN11 To Temp.sensor CN87 #1 To Fan motor relay B #2 To 7days recorder (Option) #4 To Fan motor relay A CN86 #5 To 7days recorder (Option) To Door switch...
  • Page 11 Connections on PCB The following shows connections of connector on Main PCB. Connector Connects to Usage Switching power supply #1: DC12V To supply the power to PCB. #3: GND MTR-480/MTR-L03 (Option) To connect with MTR-480/MTR-L03. Remote alarm terminal #1: COM Remote alarm contact outputs.
  • Page 12 Wiring diagram - 9 -...
  • Page 13 Circuit diagram < Main PCB > - 10 -...
  • Page 14 < LCD PCB > - 11 -...
  • Page 15 Electric parts MDF-U500VX/U500VXC 220V, 60Hz 220V, 50Hz* 230/240V,50Hz Compressor A/B Type KS370J1NS-7A KS370J1NS-4A KS370J1NS-4A1 * Compressor for china (CCC Authorization) Compressor code 7FB-0-M101-001-06 7FB-0-M101-001-04 7FB-0-M101-001-05 Type: KS370J1NS-4AD Rating 1, 220V, 60Hz 1, 220/230V, 50Hz 1, 230/240V, 50Hz Code: 7FB-0-M101-001-07 Winding resistance (C-R) 1.64...
  • Page 16 Specifications of sensor Temperature and resistance in temp. sensor (Type: 502AT-1) Temp. Temp. Temp. Temp. Resistance Resistance Resistance Resistance (k ) (k ) (k ) (k ) 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...
  • Page 17 Specifications of LCD panel 1. Basic screen T o p S c r e e n T e m p - 8 0 C o n t r o l : N o r m a l A l a r m N o r m a l S t a t u s S t a n d - b y...
  • Page 18 2 MENU/Set Temperature/alarm setting Basic Screen T o p S c r e e n M E N U T e mp - 8 0 S e t A l a r m N o r m a l L o g S t a t u s S t a n d - b y T o o l s...
  • Page 19 3 Alarms Temperature alarm buzzer intermittent tone The buzzer will sound intermittently when a high temp. alarm or a low temp. alarm occurs, assuming that the alarm condition goes on for more than the preset delay for the alarm time. Push alarm BUZZER key to stop the alarm.
  • Page 20 NT¥hypertrm.exe 2. Set up the following through the hyper-terminal screen. New connection Name Ex. Sanyo Set up of connection Connection port COM1 Properties of COM1 Set up of port Bit/Sec.9600, Data bit: 8, Parity: No, Stop bit: 1, Flow control: Xon/Xoff When a log transmitting screen is opened, terms of communication on the MDF side are set on the above condition automatically.
  • Page 21 5. MENU/Tools – Select Tools Date Time, Default Setting, Key Lock PW Setting Setting of date, Initialization, Setting of Key lock password Top Screen T o p S c r e e n M E N U T e m p - 8 0 C o n t r o l : S T D...
  • Page 22 <Setting of ECO (energy saving) mode> Operation Display ----- Top Screen is displayed. (Set) displayed with reverse Press MENU key. MENU characters on MENU window. Press key to display (Tools) with reverse characters in MENU window. Select Tools is displayed. ENTER Press ENTER key.
  • Page 23 6. MENU/Tools – Select Tools Svc (Service only) 6-1.How to access Service mode Basic Screen Select Tools T o p S c r e e n S e l e c t T o o l s M D F - U 4 0 0 V X M E N U M E N U T e m p...
  • Page 24 Reset of fan motor accumulation time Model Code Initialization of non-volatile memory 1. MDF-U400VX 2. MDF-U500VX Set “925” and select MENU/Tools - Svc – Function Initialize Data. Turn the power off and on to Key Lock password, reset of battery/fan motor reset non-volatile memory.
  • Page 25 6-6 Maintenance function Select Tools screen for service Test run screen (for factory use) S e l e c t T o o l s S v c V e r . 1 . 0 0 T e s t r u n P r o g r a m C y c...
  • Page 26 6-7 ROM version Operation MENU Turn the unit on. Basic Screen is displayed. Tools Select ‘Tools’ of MENU button to display ‘Select Tools’. Select ‘Svc’ of MENU button in ‘Default setting’ is displayed in reverse characters. ROM version for both Main PCB and LCD PCB is displayed on ‘Password’...
  • Page 27 6-8 Hardware status Operation MENU Turn the unit on. ‘Select tools Svc is displayed. Select of MENU button. Hardware status is displayed on the upper right corner of screen. Select Tools Svc n c e S e l e c t T o o l s S v c <Overlap operation>...
  • Page 28 6-9 Indication of Message Error codes Indication Meaning “Error 01: Temperature Sensor Open” Temp. sensor is open circuited. “Error 02: Temperature Sensor Short” Temp. sensor is short circuited. “Error 03: Condenser Sensor ‘A’ Open” Sensor at exit of condenser in A circuit is open circuited. “Error 04: Condenser Sensor ‘A’...
  • Page 29 Control specifications 1. Temperature control Settable range : -50 ~ -90 (For a maximum temp operation, when you input “99”, the chamber temperature will be set to -99 .) Chamber temperature display range: -180 ~ +50 How to set chamber temperature: In TopScreen, press MENU key to step to setting mode.
  • Page 30 (3) Low temperature alarm Condition: When display temperature deviates from current set temperature and reaches low temp.alarm set point. Action: Temp. indication blinks, buzzer sounds intermittently and remote alarm contact activates after Alarm Delay time elapses. Press BUZZER key to stop buzzer sounding, however, remote alarm contact remains active.
  • Page 31 6. Normal mode a) Compressor operation ON: Compressor A turns on after 3 minutes (factory default) elapsed time since the power is supplied. Compressor B turns on after 1 minute after. Unit also performs this sequence in a cycle operation. OFF: Compressor A and B turns off simultaneously.
  • Page 32 7. ECO mode (Energy-saving mode) (1) Compressor alternate run Compressor A will cycle run alternately with Compressor B, when it is possible to maintain cycle operation with a single compressor. Purpose: To extend ON/OFF cycle duration for 1 unit. a) When unit reaches set temp +0.4 , Compressor A turns on. b) When unit reaches set temp -0.4 , Compressor A turns off.
  • Page 33 (2)Compressor overlapping run When unit cannot maintain cooling performance with a single compressor, compressor running time overlaps between Compressor A and B. a) When unit reaches set temp -0.4 during compressor overlapping run, either Compressor A or B stops running. When unit reaches set temp -0.4 for the 1 time during compressor overlapping run, Compressor B stops running.
  • Page 34 (3) Compressor maximum running time Either Compressor A or B keeps running for 90 minutes at maximum for compressor protection. Operation sequence Ex: In compressor overlapping run When a unit reaches to the point where either compressor A or B runs solely, Compressor A should be turned on.
  • Page 35 8. Diagnosis of abnormal cooling circuit (1) Normal mode Frequency: Diagnosis is performed for once per day (2:00a.m. or later) on either compressor A and B. Diagnosis of compressor A is done first. (Ex.) After the power is supplied, diagnosis of compressor A is performed at 2:00a.m. or later. Diagnosis of compressor B is performed the next day.
  • Page 36 (2) ECO mode ( Compressor overlapping run/alternate run) Frequency: Both compressor A and B are forced off (pull-up) once per day prior to diagnosis. Diagnosis is performed for once per day (2:00a.m. or later) on either compressor A or B. Diagnosis of compressor A is performed prior to compressor B.
  • Page 37 9. Fan motor lock Condensing fan motor lock can be detected by current in condensing fan motor A/B. (1) Case-1: Diagnosis is performed by measuring the difference in current between condensing fan motor A and B. Diagnosed values in both current transformer A and B is decided after 2 minutes have elapsed since the power was supplied.
  • Page 38 (5) Flowchart of “Fan motor lock” detection Power turns on Fan motor A turns on Fan motor B turns on Fan motor B turns on value in Current trans Value in Current trans B is lower than 20 A is lower than 20 Temp.
  • Page 39 10. Cap. tube heater control Compressor is forced to stop running for 8 minutes after unit detects compressor was turned off at 2:00a.m. or after. When the compressor keeps running for 60 minutes after the unit completed diagnosis for cooling circuit, the compressor is forced to stop running.
  • Page 40 15. Setting parameter and factory defaults Chamber temp. (Default: -80 High temp. alarm (Default: +10 Low temp. alarm (Default: -10 0min. 15min. Alarm delay time (Default: 15min.) 1min.~99min. (0:OFF) Ring Back (Default: 30min.) 1min.~ 15min. Door delay time (Default: 2min.) ON: Set temp.+0.4 Compressor differential value OFF: Set temp.-0.4...
  • Page 41 Parts layout [ Front / Control panel ] [Opposite side of Control panel ] Switch PCB LCD PCB [ Left side ] Door latch [ Left side at inner wall ] Air intake port PT sensor Air intake port [ Lower Left side ] [ Rear side ] [ Lower right rear ] Power switch...
  • Page 42 [ Lower left side / Electric Box ] 12P terminals Main PCB [ Lower front / Panel removed ] AT sensor [ Rear botton / Cooling unit ] [ Rear side bottom / cooling unit ] Condensing fan motor Compressor A Compressor B ( Terminal cover is removed ) - 39 -...
  • Page 43 Repair of cooling unit 1. Preparation * Refrigerant [MU-N400] * Connector for charging pipe (if necessary) 2. Procedure of collecting refrigerant 1) Evacuate regrigeration circuit for approx. 5min. by using vacuum pump. <NOTE> Must be performed evacuation to avoid causing fire by residual refrigerant (R-600) in the circuit.
  • Page 44 3. Procedure of charging refrigerant 1) Stop vacuum pump operation. Open the valve of tank to charge refrigerant to H stage side. Gauge pressure: 0.2~0.5 Mpa/G. <Charging refrigerant> 2) Charge refrigerant until gauge shows "1.6MPa/G" at criterion. Shut the valve off. Hold charging pipe by pliers to pinch it off using by pinch pliers.
  • Page 45 Troubleshooting Error 18, Error 19 (Abnormal in cooling circuit) LCD indication Check point Symptom (1) Symptom (2) Remedy Compressor(s) burned out No discoloraion found in oil Replacement of compressor(s), dryer Does compressor(s) Discoloration found in oil Replacement of compressor(s), dryer and oil separator turn on? Discoloration found in oil of oil separator Replacement of Cascade foaming...
  • Page 46 Error 01~08 (Abnormal in sensor) LCD indication Symptom/Diagnosis Remedy Temp. sensor is open circuited Check connections of connectors/lead wires in temp. sensor Error 01 Temperature Sensor is Open Diagnosis: More than 1189 If resistance for temp. sensor is more than 1189 , replace the sensor. Temp.
  • Page 47 High temp. alarm Condition When chamber temp. reaches to Set temp +5 20 Factory default:+10 (Unit is in normal condition Alarm indication ALARM lamp blinks. Temperature indication in reverse and non-reverse characters Message "High Temp Warning 20XX/XX/XX XX:XX" Audible alarm sounds intermittently and remote alarm activates after delay time passes. Delay time is changeable between 0 15 minutes.
  • Page 48 Low temp. alarm Condition When chamber temp. reaches to set temp.-5 -20 Factory default:-10 (Unit is in normal condition) Alarm indication ALARM lamp blinks Temperature indication in reverse and non-reverse characters Message "Low Temp Warning 20XX/XX/XX XX:XX" Audible alarm sounds intermittently and remote alarm activates after delay time passes Delay time is changeable between 0~15 minutes.
  • Page 49 Power failure alarm Condition If a power failure is occurred when battery switch is in ON (Unit is in normal condition) Alarm indication Backlight turns off "Warning" indicates in reverse and non-reverse characters "Status_2" indicates in reverse and non-reverse characters Message "Power failure Warning 20XX/XX/XX XX:XX"...
  • Page 50 Door alarm Condition When a door is open When door delay time expires after door was open (Door is closed) Alarm indication ”OPEN"indicates in reverse and non-reverse characters Audible alarm sounds intermittently after predetermined delay time expires Delay time is changeable between 0 15minutes Factory default: 2min.) Is there "OPEN"indicated Check for input of door switch on Main PCB...
  • Page 51 Test data * All the data are the reference only. AT30 Pull-down & Pull-up Temperture 200V50Hz Pull-down 200V60Hz Pull-down Pull-up Time[hour] AT35 Pull-down Tempertures A EVA IN A EVA OUT B EVA IN B EVA OUT -100 -120 Time[hour] - 48 -...
  • Page 52 AT35 Pull-down Pressure 50Hz A_Pd[MPa] A_P [MPa] B_Pd[MPa] B_P [MPa] Time[hour] AT35 Pull-down Pressure 60Hz A_Pd[MPa] A_P [MPa] B_Pd[MPa] B_P [MPa] Time[hour] AT35 Pull-down Current-Input 1400 1200 1000 50Hz 60Hz 50Hz 60Hz Time[hour] - 49 -...
  • Page 53 Temperature uniformity data(17 points measured) <Measured points> Back Top of interior Measured points, upper Front 65mmH ~ : 65mm(H) from top of interior, 27mm(D) and 25.5mm(W) from each corners on Middle shelf : 65mm(H) from top of interior 10mmH : 10mm(H) from upper shelf Upper shelf 25.5mmW 27mmD...
  • Page 54 Note) Following data are the reference only, so they does not assure product's performance. For the graphs of ECO-mode, it does not assure re-production in actually. <Conditions> Ambient temp: 20/30 Normal mode, ECO-mode No load Set temp: -80 , Ambient temp:20 , Normal mode, Air temp. SV-80 , AT20 , Normal mode, 50Hz Time[Hour] SV-80 , AT20 , Normal mode, 60Hz...
  • Page 55 Set temp:-80 , Ambient temp:30 , Normal mode, Air temp. Unit: AT 30 , Normal mode 50Hz 60Hz Center of Center of Max. Min. Difference Max. Min. Difference cycle cycle Upper Left front -76.9 -80.2 -78.6 ±1.7 -76.8 -80.4 -78.6 ±1.8 Left back -78.3...
  • Page 56 Set temp: -80 , Ambient temp: 20 , ECO-mode, Air temp. Unit: AT 20 , ECO mode 50Hz 60Hz Center of Center of Max. Min. Difference Max. Min. Difference cycle cycle Upper Left front Left back Right front Right back Center Middle Left front...
  • Page 57 Set temp: -80 , Ambient temp: 30 , ECO-mode, Air temp. Unit: AT 30 , ECO mode 50Hz 60Hz Center of Center of Max. Min. Difference Max. Min. Difference cycle cycle Upper Left front Left back Right front Right back Center Middle Left front...
  • Page 58 Set temp: -70 , Ambient temp: 20 , Normal mode, Air temp. Unit: AT 20 , Normal mode 50Hz 60Hz Center of Center of Max. Min. Difference Max. Min. Difference cycle cycle Upper Left front Left back Right front Right back Center Middle Left front...
  • Page 59 Set temp:-70 , Ambient temp:30 , Normal mode, Air temp Unit: AT 30 , Normal mode 50Hz 60Hz Center of Center of Max. Min. Difference Max. Min. Difference cycle cycle Upper Left front Left back Right front Right back Center Middle Left front Left back...
  • Page 60 Set temp: -70 , Ambient temp: 20 , ECO-mode, Air temp. Unit: AT 20 , ECO mode 50Hz 60Hz Center of Center of Max. Min. Difference Max. Min. Difference cycle cycle Upper Left front Left back Right front Right back Center Middle Left front...
  • Page 61 Set temp: -70 , Ambient temp: 30 , ECO-mode, Air temp. Unit: AT 30 , ECO mode 50Hz 60Hz Center of Center of Max. Min. Difference Max. Min. Difference cycle cycle Upper Left front Left back Right front Right back Center Middle Left front...
  • Page 62 Amount of power consumption * Following data are the reference only. Condition: SV-80 , Cycle operation Unit: kWh/day AT 20 AT 30 50Hz 60Hz 50Hz 60Hz Normal mode 15.41 16.37 17.59 18.66 ECO mode 14.27 15.01 17.52 18.74 Condition: SV-70 , Cycle operation Unit: kWh/day AT 20 AT 30...
  • Page 63 Ambient temp.: 30 500ml x 45 bottles Front Load-a 500ml x 45 bottles Load-b 500ml x 45 bottles Load-c 500ml x 45 bottles Load-d MDF-U500VX SV-80 Pull-down test Load-a Load-b Load-c Load-d L EVA OUT EVA IN -100 Time hr...
  • Page 64 (2) Temperatures after unit reaches to set temperature Condition: 500ml water bottle x 180pcs. (90L in total) Measuring points: L EVA IN, L EVA OUT, a, b, c, d Set temp.: -80 , -70 MDF-U500VX Temperatures after unit reaches to -80 Load-d Load-b Load-c...
  • Page 65 500ml x 45 bottles Front Load-a 500ml x 45 bottles Load-b 500ml x 45 bottles Load-c 500ml x 45 bottles Load-d MDF-U500VX SV-80 Pull-up test L EVA OUT Load-d Load-c L EVA IN Load-b Load-a Time hr - 62 -...
  • Page 66 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 67 MDF-U500VX INSTRUCTION MANUAL MDF-U500VXC Ultra-Low Temperature Freezer - 64 - - 64 -...

  • Page 68: Table Of Contents

    CONTENTS INTRODUCTION P. 2 PRECAUTIONS FOR SAFE OPERATION P. 3 ENVIRONMENTAL CONDITIONS P. 7 FREEZER COMPONENTS P. 8 Control panel P. 10 REMOTE ALARM TERMINAL P. 11 AIR INTAKE PORT P. 11 INSTALLATION SITE P. 12 INSTALLATION P. 13 START-UP OF UNIT P.
  • Page 69 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 70: 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 71 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 72 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 cylinders with liquid on the unit as this may cause electric shock or short circuit when the liquid is spilled.
  • Page 73 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 74: Environmental Conditions

    ENVIRONMENTAL CONDITIONS This equipment is designed to be safe at least under the following conditions (based on the IEC-61010-1): 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 ±10% of the nominal voltage;...

  • Page 75: Freezer Components

    FREEZER COMPONENTS O F F Compressor Compressor for B Power switch for A Rear side - 72 -...
  • Page 76 FREEZER COMPONENTS 1. Outer door: To open the door, grip the handle. On closing, lock the door latch completely. 2. Inner door: The operation of the inner door should be quick to minimize the temperature rise in chamber. Lock the door latch completely when the door is closed. The door is removable for cleaning or defrosting.

  • Page 77: Control Panel

    FREEZER COMPONENTS Control panel 1. LCD panel 2. Alarm lamp (ALARM): This lamp is flashed during alarm condition. 3. Figure input key: User for operation setting. 4. Menu button (MENU): To open the menu window during setting. 5. Shift key (Upward, downward, rightward, leftward): To move the cursor on the LCD panel during setting.

  • Page 78: 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 79: Installation Site

    INSTALLATION SITE To operate this unit properly and to obtain maximum performance, install the unit in a location with the following conditions: A location not subjected to direct sunlight Do not install the unit under direct sunlight. Installation in a location subjected to direct sunlight cannot obtain the intended performance.

  • Page 80: 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 81: 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 82: Function Of Control Panel

    When this function is used, an optional interface board is necessary. Contact Sanyo sales representative or agent at the time of installation of the optional parts.(refer to P. 53) 3. Setting of date and time: To set the date and time shown on the top screen. refer to page 29 4.

  • Page 83: Basic Screen Of Control Panel

    BASIC SCREEN OF CONTROL PANEL When the power switch is turned on, the top screen is displayed on the LCD panel. T o p S c r e e n T e m p - 8 0 C o n t r o l : N o r m a l A l a r m N o r m a l...

  • Page 84: Running Operation (Menu/Set)

    RUNNING OPERATION (MENU/Set) This product is operated with set temperature at the time of start-up. 1. With the basic screen displayed, press the menu button (MENU) to show the menu window. Select “Set”, and press the enter key (ENTER). 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 T o p...

  • Page 85: Chamber Temperature Setting (Temperature)

    RUNNING OPERATION (MENU/Set) Chamber temperature setting (Temperature) 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 -35 Note: The unit is set at the factory that the chamber temperature -80 C.

  • Page 86: Alarm Temp. Setting (High Alarm/Low Alarm)

    RUNNING OPERATION (MENU/Set) Alarm temp. setting (High Alarm/Low Alarm) As an example, Table 2 shows the procedure to set the high temperature alarm so that the alarm can activate when the chamber temperature is 5 C higher than the set temperature. Table 3 shows the procedure to set the low temperature alarm so that the alarm can activate when the chamber temperature is 5 C lower than the set temperature.

  • Page 87: Alarm Delay Time Setting (Alarm Delay)

    RUNNING OPERATION (MENU/Set) Alarm delay time setting (Alarm Delay) The setting range for delay time is between 0 and 15 minutes. I When 0 is set, the alarm buzzer sound without delay. The factory setting is 15 minutes. Table 4 shows the basic procedure for setting the alarm delay time.

  • Page 88: Ring Back Of Alarm Buzzer Setting (Ring Back)

    RUNNING OPERATION (MENU/Set) Ring back of alarm buzzer setting (Ring Back) The alarm buzzer is silenced by pressing alarm buzzer stop key (BUZZER) on the control panel during alarm condition (The remote alarm sound and lamp are not silenced.). The buzzer will be activated again after certain suspension if the alarm condition is continued.

  • Page 89: Key Lock Function

    RUNNING OPERATION (MENU/Set) Key lock function This unit is provided with the key lock function. When the key lock is ON, change of temperature setting through the key pad is not available. The key lock is set in OFF at the factory. If a key lock is on, a temperature selection screen can be seen.

  • Page 90: Key Lock Release Function

    Factory setting is 0000. Refer to P.32. Contact Sanyo sales representative or agent at the time when a password is forgotten. 1. On the temperature setting screen (Temp. Setting), input 0 in the “Key Lock” field, and press the enter key (ENTER).

  • Page 91: Various Setting (Menu/Log) Display Of Log (Log)

    ENTER ENTER key. Note: When this function is used, an optional interface board is necessary. Contact Sanyo sales representative or agent at the time of installation of the optional parts. ( - 2 5 2 0 0 9 / 1 2 / 0 1...

  • Page 92: Indication Of Log And Transmission

    ENTER window, and press the ENTER key. Note: When this function is used, an optional interface board is necessary. Contact Sanyo sales representative or agent at the time of installation of the optional parts. Settlement of each parameter: With the shift key , the date is shifted.
  • Page 93 C : Start from ¥Program Files¥ Windows NT¥hypertrm.exe. 2. Set up the following through the hyper-terminal screen. New connection Name (Example) Sanyo Setup of the connection Connection port COM1 Properties of COM1 Setup of the port Bit/sec.: 9600 Data bit: 8 Parity: No Stop bit: 1 Flow control: Xon/Xoff...

  • Page 94: Various Setting (Menu/Tools)

    Note: When the interface board of the option is installed on the product, "the function of 2 to 4 of each following parameter setting range is used. Contact Sanyo sales representative or agent at the time of installation of the optional parts.

  • Page 95: Set Of Date, Time, Log Interval (Tools/Date Time)

    VARIOUS SETTING (MENU/Tools) Set of date, time, log interval (Tools/Date Time) A date, time and a Log interval configuration screen (Date Time) are chosen on the basic screen (Select Tools). Then, each parameter is set up on the date, time setup screen (Date Time . D a t e T i m e D a t e...

  • Page 96: Set Of Door Alarm Delay Time (Tools/Door Delay)

    VARIOUS SETTING (MENU/Tools) Set of door alarm delay time (Tools/Door Delay) This product has the setup function of the door alarm delay time. (Factory setting is 2 minutes.) The variable range of the door alarm delay time is 1-minute-15 minutes. . A setup example is the following. Table 11 Door alarm delay time setup process (When door alarm delay time is changed from 2 minutes to 10 minutes.) Description of operation...

  • Page 97: Set Of Log Interval (Tools/Log Interval)

    VARIOUS SETTING (MENU/Tools) Set of log interval (Tools/Log Interval) This product can change the set point of the log interval (Log Interval) until 2 minute - 30 minutes. (Factory setting is 15 minutes.) It can be recorded for about 5 weeks if it is a log interval for 15 minutes. Table 12 The log interval set-up steps of the log (When a log interval is changed from 15 minutes to 10 minutes.) Description of operation...

  • Page 98: Change Of Compressor Delay Time (Tools/Comp. Delay)

    VARIOUS SETTING (MENU/Tools) Change of compressor delay time (Tools/Comp. Delay) There is a starting delay time setup (Comp Delay) of A compressor /B compressor in the power failure recovery in this product. That can be set up until 3-15 minutes. A compressor setup in the factory shipment is 3 minutes.

  • Page 99: Set Of Key Lock Password Tools/Key Lock Pw Setting

    VARIOUS SETTING (MENU/Tools) Set of key lock password Tools/Key Lock PW Setting 1. On the setting screen (Select Tools), select “Key Lock PW Setting”, select “OK” and press the enter key (ENTER). Input the present password (4 digits), select “OK” and press the enter key (ENTER). (Factory setting is 0000.) K e y L o c k .

  • Page 100: Monitor Of Freezer Status

    MONITOR OF FREEZER STATUS This product has the operation monitor system which shows it in the table 14. It is the system to inform it of the operation conditions of the product. Operation conditions are indicated in the Status indication of the basic screen and the message indication.

  • Page 101: Alarms & Safety Functions

    ALARMS & SAFETY FUNCTIONS This product has the alarm & safety function of the table 15. Table 15 Alarm & safety function list Safety Alarm & safety Situation Indication Buzzer operation Alarm lamp flashed If the chamber temperature is Temp. indicator is flashed higher than the temperature at High temp.
  • Page 102 ALARMS & SAFETY FUNCTIONS Table 15. Alarms and safety functions Alarm & safety Situation Indication Buzzer Safety operation Message indication: If the thermal sensor is disconnected. “Error E01: Temp Sensor Remote alarm. Open.” Intermittent tone Unit is continuous Message indication: running.

  • Page 103: 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 104: Cleaning Of Air Intake Port

    ROUTINE MAINTENANCE Cleaning of air intake port The cap of the left side is turned counterclockwise (Counterclockwise direction), and this product is removed, and the outer air is adopted into the chamber, and it opens a outer door. Therefore, frost is easy to be settled around the air intake port inside the chamber.

  • Page 105: 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 106: Troubleshooting

    Take a butterbur with the cloth which dried when it dewed. 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. - 103 -...

  • Page 107: 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 108 The symbol mark and recycling systems described below apply to EU countries and do not apply to countries in other areas of the world. Your SANYO product is designed and manufactured with high quality materials and components which can be recycled and/or reused.
  • Page 109 POUR LES UTILISATEURS DE UE Le symbole et les systèmes de recyclage évoqués ci-dessous s'appliquent uniquement aux pays de UE. Votre produit SANYO est conçu et fabriqué avec des composants et des matériaux de hautes qualités qui peuvent être recyclés et/ou réutilisés.
  • Page 110 PER UTENTI UE Il simbolo e i sistemi di riciclaggio descritti di seguito si applicano esclusivamente ai paesi dell’UE. Questo prodotto SANYO è stato progettato e realizzato con materiali e componenti di elevata qualità che possono essere riciclati e/o riutilizzati.
  • Page 111 Het symbool en de recycleersystemen die hieronder beschreven worden, zijn van toepassing op de landen in de EU en zijn niet van toepassing op landen in andere delen van de wereld. Uw SANYO product is ontworpen en gemaakt met materialen en onderdelen van hoge kwaliteit, die gerecycleerd en opnieuw gebruikt kunnen worden.

  • Page 112: Temperature Recorder (Option)

    TEMPERATURE RECORDER (OPTION) A temperature recorder is available for this freezer as the optional component. The type of the recorder is MTR-G85. Consult Sanyo sales representative or agent for the recorder installation. Following shows the attachment procedure. 1. Remove four screws on the front panel and take it off.
  • Page 113 TEMPERATURE RECORDER (OPTION) 4. As shown in the Fig. 4, pass the recorder sensor Sensor guide pipe through the sensor guide pipe from the front to the back. The sensor guide pipe is provided on the upper left side of the base compartment. 5.

  • Page 114: 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.

  • Page 115: Mounting Of Interface Board (Option)

    MOUNTING OF INTERFACE BOARD (OPTION) By installing an interface board (MTR-480), the log data can be transmitted to a PC. The mounting procedure is as follows: 1. Remove 4 screws of the communication box hole cover in the control panel. (Fig. 1) 2.

  • Page 116: Mounting Of Lan Interface Board (Option)

    MOUNTING OF LAN INTERFACE BOARD (OPTION) By installing an LAN interface board (MTR-L03), the log data can be transmitted to a PC. The mounting procedure is as follows: 1. Remove 4 screws of the communication box hole cover in the control panel. (Fig. 1) 2.

  • Page 117: Specifications

    • The battery for power failure alarm is an article for consumption. It is recommended that the battery will be replaced about every 3 years. Contact Sanyo sales representative or agent at the time of replacement of the battery for recycling.

  • Page 118: Performance

    PERFORMANCE Model MDF-U500VX Cooling performance C at the center of the chamber (ambient temperature; 30 C, no load)* Temperature control range C to -86 C (ambient temperature; 30 C, no load) Power source 220 V, 50 Hz 220 V, 60 Hz...

  • Page 119: Safety Check Sheet

    Procedure to be adhered to in order to reduce safety risk indicated in b) below. Date : Signature : Address, Division : Telephone : Product name: Model: Serial number: Date of installation: Ultra-low temperature MDF-U500VX freezer MDF-U500VXC Please decontaminate the unit yourself before calling the service engineer. - 116 -...
  • Page 120 SANYO Electric Co., Ltd Printed in Japan...

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Mdf-u500vxc

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