INSTRUCTION MANUAL Ultra-Low Temperature Freezer MDF-U7486S - 42 - MDF-U7486S MDF-U7486SC MDF-U5486S MDF-U5486SC
CONTENTS INTRODUCTION P. 2 PRECAUTIONS FOR SAFE OPERATION P. 3 ENVIRONMENTAL CONDITIONS P. 7 FREEZER COMPONENTS P. 8 Control panel P.10 INSTALLATION SITE P.11 INSTALLATION P.12 START-UP OF UNIT P.13 CHAMBER TEMERATURE SETTING P.14 KEY LOCK FUNCTION P.14 ALARM TEMPERATURE SETTING P.15 SETTING OF ALARM RESUME TIME P.16 REMOTE ALARM TERMINAL P.17 AIR INTAKE PORT P.17 CHANGE OF COMPRESSOR DELAY TIME P.18 ALARMS & SAFETY FUNCTIONS P.19 ROUTINE MAINTENANCE Cleaning of cabinet P.
INTRODUCTION Read this manual carefully before using the appliance and follow the instructions for safety operation. Sanyo never guarantee any safety if the appliance is used for any objects other than intended use or used by any procedures other than those mentioned in this manual. Keep this manual in an adequate place to refer to it as necessary. The contents of the manual will be subjected to change without notice due to the improvement of performance or functions.
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. Precautions are illustrated in the following way: WARNING Failure to observe WARNING signs could result in a hazard to personnel possibly resulting in serious injury or death.
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. unqualified personnel may cause electric shock or fire. The installation by Install the unit on a sturdy floor and take an adequate precaution to prevent the unit from turning over.
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. Never bind, process, or step on the power supply cord, or never damage or break the power supply plug.
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. Never store corrosive substances such as acid or alkali in this unit if the container cannot be sealed.
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 5oC to 40oC Maximum relative humidity 80% for temperature up to 31oC decreasing linearly to 50% relative humidity at 40oC; Mains supply voltage fluctuations not to exceed 㼼10% of the nominal voltage; Other supply voltage fluctuations as stated by the manufacturer; Transient overvoltages according to Installatio
FREEZER COMPONENTS 13 1 2 3 14 4 13 (inside) 5 12 6 7 15 11 16 19 10 9 (inside) 8 17 18 Power cord Rear side - 50 - 8
FREEZER COMPONENTS 1. Outer door: To open the outer door, grip the handle. completely. On closing, lock the outer door latch 2. Inner door: The operation of the inner door should be quick to minimize the temperature rise in chamber. Lock the inner door latch completely when the inner door is closed. The inner door is removable for cleaning or defrosting. See page 21 “Routine maintenance”. 3. Inner door latch: Always lock the inner door latch when the inner door is closed. 4.
FREEZER COMPONENTS Control panel 1 9 1. Digital temperature indicator: temperature. 8 2 3 7 4 6 5 This indicator shows the present chamber temperature or set 2. Battery check lamp (BATTERY): This lamp flickers to recommend the battery replacement. For the replacement, consult Sanyo sales representative or agent. 3. Alarm lamp (ALARM): This lamp is flashed during alarm condition. 4. Filter lamp (FILTER): This lamp lights when the excessive dust is accumulated on the condenser filter.
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. A location with adequate ventilation Leave at least 10 cm around the unit for ventilation.
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. Then wipe off the panels with a dry cloth. 2.
START-UP OF UNIT Follow the procedures for the initial and consequent operations of the unit. 1. Turn off the switch of the back-up system (optional component) if it is installed. 2. Connect the power supply cord to the dedicated outlet having appropriate rating with the chamber empty, and turn on the power switch on the freezer. 3. Turn on the battery switch. 4. Set the desired chamber temperature. See page 14 for the temperature setting. 5.
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 -75oC. Note: The unit is set at the factory that the chamber temperature -80oC. Table 1. Basic operation sequence (Example: Chamber temperature -75oC) Description of operation 1 Turn the power switch ON. 2 Press set key.
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.
SETTING OF ALARM RESUME TIME The alarm buzzer is silenced by pressing alarm buzzer stop key (BUZZER) on the control panel during alarm condition. (A remote alarm is continuing the operation.) 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 5 below. The example in the table is based on the assumption that the desired duration is 20 minutes.
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 30V, 2 A. Contact output: between COM. and N.O. between COM. and N.C. At normal Open Close At abnormal Close Open Note: • The alarm buzzer is silenced by pressing alarm buzzer stop key (BUZZER) on the control panel during alarm condition. (A remote alarm is continuing the operation.
SETTING 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 3 minutes at the factory.) Note: • The setting range for delay time is between 3 and 15 minutes.
ALARMS & SAFETY FUNCTIONS This unit has the alarms and safety functions shown in Table 7, and also self diagnostic functions. Table 7. Alarms and safety functions Alarm High temperature alarm Low temperature alarm Power failure alarm Filter alarm Battery check Fan motor check Auto-return Key lock Situation If the chamber temperature is higher than the temperature at which the high temperature alarm is activated.
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. These may be harmful to your health. Cleaning of cabinet 㻊 Clean the unit once a month. Regular cleaning keeps the unit looking new.
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 magnetic door gasket, which may cause poor cooling. Remove the frost on the inner door with a scraper enclosed with the unit. Following shows the procedure for removing the chamber frost. Note: For removing the frost, do not use a tool with sharp edge such as a knife or a screw driver. 1.
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. Clean it in the case shown below. Condition Check / Remedy When frost and ice can be seen in the port of the air intake port.
TROUBLE SHOOTING If the unit malfunctions, check out the following before calling for service. Malfunction The chamber is not cooled at all The cooling is poor 㻊 㻊 㻊 㻊 㻊 time. 㻊 The ambient temperature is too high. 㻊 The latch of inner door is not closed completely. The outer door is not closed firmly. (The frost or ice between the cabinet and door gasket possibly prevents door seal.) 㻊 The air intake vent is blocked. 㻊 The condenser filter is clogged.
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. Recycle of battery The unit contains a rechargeable battery. The battery is recyclable. At the end of it’s useful life, check with you local solid officials option or proper disposal.
DISPOSAL 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. Disposal of nickel-metal-hydride battery 1.
BACK-UP SYSTEM (OPTION) WARNING As with any equipment that uses CO2 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. If restricted ventilation is suspected, then other methods of ensuring a safe environment must be considered. These may include atmosphere monitoring and warning devices.
TEMPERATURE RECORDER (OPTION) Installation of MTR-85H/MTR-G85 Contact Sanyo sales representative or agent for the attachment of an automatic temperature recorder. : INTERFACE BOARD (OPTION) Installation of MTR-480/MTR-L03 Contact Sanyo sales representative or agent for the attachment of a interface board. : Note: 㸨 When a data transmitting function to the personal computer is done, an interface board MTR-480 (option goods) and communication cable of 9 pin Dsub cross type for RS232C are necessary.
INVENTORY RACK (OPTION) The optional inventory rack is useful to store the precious materials in the chamber effectively. When the rack is used, it is necessary to adjust the height of the shelves. Set the shelf support as shown in the figure below. IR-220U Shelf support MDF-U5486SC NO. 8 under the second screw from the top Shelf stopper No. 3 under the ffifth screw from the top No.
SPECIFICATIONS Name Model Ultra-Low Temperature Freezer MDF-U5486S MDF-U5486SC External dimensions W890 x D870 x H1990 (mm) Internal dimensions W630 x D600 x H1280 (mm) Effective capacity 483 L Exterior Painted steel Interior Painted steel Outer door Painted steel Inner door ABS resin panel with stainless frame, 2 doors Shelf Access port Stainless steel, 3 shelves (adjustable) W608 x D535 (mm), Load; 50 kg/shelf 17 mm diameter, 2 locations (back, bottom left corner) Insulation Rigid poly
SPECIFICATIONS Name Model Ultra-Low Temperature Freezer MDF-U7486S MDF-U7486SC External dimensions W1130 x D875 x H1990 (mm) Internal dimensions W870 x D600 x H1280 (mm) Effective capacity 668 L Exterior Painted steel Interior Painted steel Outer door Painted steel Inner door ABS resin panel with stainless frame, 2 doors Shelf Access port Stainless steel, 3 shelves (adjustable) W848 x D533 (mm), Load; 50 kg/shelf 17 mm diameter, 2 locations (back, bottom left corner) Insulation Rigid pol
PERFORMANCE Model Cooling performance Temperature control range MDF-U5486S MDF-U7486S MDF-U5486SC (for U.S.A. only) MDF-U7486SC (for U.S.A. only) -86oC at the center of the chamber (ambient temperature; 30oC, no load) -50oC to -86oC (ambient temperature; 30oC, no load) Power source Rated power consumption Noise level 220 V, 60 Hz 1180 W 1210 W 51 dB [A] (background noise; 20 dB) Maximum pressure 2.7 MPa Note : The unit with CE mark complies with EC directives 89/336/EEC.
CAUTION Please fill in this form before servicing. Hand over this form to the service engineer to keep for his and your safety. Safety check sheet 1. Freezer contents : Risk of infection: Risk of toxicity: Risk from radioactive sources: ڧYes ڧNo ڧYes ڧYes ڧYes ڧNo ڧNo ڧNo (List all potentially hazardous materials that have been stored in this unit.) Notes : 2.
SANYO Electric Co.
