INSTRUCTION MANUAL Ultra-Low Temperature Freezer MDF-U32V
Note: 1. No part of this manual may be reproduced in any form without the expressed written permission of SANYO. 2. The contents of this manual are subject to change without notice. 3. Please contact SANYO if any point in this manual is unclear or if there are any inaccuracies. SANYO Electric Biomedical Co., Ltd. All rights reserved. Printed in Japan.
CONTENTS PRECAUTIONS FOR SAFE OPERATION P. 2 CAUTIONS FOR USAGE P. 6 ENVIRONMENTAL CONDITIONS P. 7 FREEZER COMPONENTS P. 8 Control panel and keypad P.10 INSTALLATION Installation site P.11 Installation P.12 OPTIONAL COMPONENTS Temperature recorder P.13 Back-up system P.14 Inventory rack P.15 START-UP OF UNIT P.16 TEMPERATURE SETTING Chamber temperature P.17 Key lock function P.17 Alarm temperature setting P.18 ALARMS & SAFETY FUNCTIONS P.19 SETTING OF ALARM RESUME TIME P.
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. If the floor is not strong enough or the installation site is not adequate, this may result in injury from the unit falling or tipping 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 disassemble, repair, or modify the unit yourself. Any such work carried out by an unauthorized person may result in fire or injury due to a malfunction. Disconnect the power supply plug if there is something wrong with the unit.
PRECAUTIONS FOR SAFE OPERATION CAUTION Check the setting when starting up of operation after power failure or turning off of power switch. The stored items may be damaged due to the change of setting. Do not put a container with water or heavy articles on the unit. It may cause injury if the articles fall. Current leakage or electric shock may be resulted form the deterioration of insulation by spilled water. Do not climb onto the unit or do not put articles on the unit.
CAUTIONS FOR USAGE 1. When the first start-up or start-up after no use of long period, the warning device may not operate, because its Ni-MH battery has completely discharged. This does not denote a malfunction. In this case, continue to operate the unit for about 3 hours, then push the test switch to check if the warning device operates. To fully recharge the completely discharged battery, the unit has to be operated for about 2 days. 2.
ENVIRONMENTAL CONDITIONS This equipment is designed to be safe at least under the following conditions (based on the IEC-1010-1): 1. Indoor use; 2. Altitude up to 2000 m; 3. Ambient temperature 5oC to 40oC 4. Maximum relative humidity 80% for temperature up to 31oC decreasing linearly to 50% relative humidity at 40oC; 5. Mains supply voltage fluctuations not to exceed ±10% of the nominal voltage; 6. Other supply voltage fluctuations as stated by the manufacturer; 7.
FREEZER COMPONENTS 5 8 1 11 6 3 2 4 5（inside） 12 10 9 7 13 15（inside） 14 17 16 18 8
FREEZER COMPONENTS 1. Outer door: 2. Handle: To open the door, grip the handle. On closing, lock the door latch completely. 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. Magnetic door gasket: This provides a tight door seal and prevents cold air leak. Keep clean. 5. Access port (rear and bottom): This is used for leading a cable and sensor of a measuring equipment, or nozzle of back-up system to chamber. 6.
FREEZER COMPONENTS Control panel and keypad 5 11 TEMPERATURE ULTRA LOW 10 8 6 9 BATTERY FILTER STATUS ALARM DOOR BUZZER ALARM TEST STATUS SET 1 7 12 2 3 4 1. Buzzer stop key (BUZZER): To silence the audible alarm under alarm condition, press this key. The buzzer during alarm test cannot be silenced by this key. 2. Set key (SET): Temperature setting mode is led by pressing this key and the changeable digit is flashed. By pressing this key again, the setting is memorized.
INSTALLATION 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. A location with adequate ventilation Leave at least 10 cm around the unit for ventilation. Poor ventilation will result in a reduction of the refrigeration capacity. 3.
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. Then wipe off the panels with a dry cloth. 2.
OPTIONAL COMPONENTS Temperature recorder 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. Then take off the cover for the recorder mounting space by removing four screws. (Fig. 1) Fig. 1 2. As shown in the Fig.
OPTIONAL COMPONENTS Back-up system 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.
OPTIONAL COMPONENTS Inventory rack 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-216U IR-220U Shelf support No. 7 under first screw from the top Shelf stopper No. 1 under forth screw from the top No.
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. Turn off the switch of the back-up system (optional component) if it is installed. 3. Check that the battery switch is ON. 4. The audible alarm may activated. In this case, press the buzzer stop key (BUZZER) to silence the alarm. 5. Set the desired chamber temperature.
TEMPERATURE SETTING Chamber 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 -75oC. Note: The unit is set at the factory that the chamber temperature -80oC. Table 1. 1 Chamber temperature -75oC) Basic operation sequence (Example: Description of operation Turn the power switch ON. 2 Press SET key.
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.
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 High temperature alarm Low temperature alarm Power failure alarm Filter check Battery check Auto-return Key lock Situation If the chamber temperature is higher than the temperature at which the high temperature alarm is activated.
SETTING OF ALARM RESUME TIME The alarm buzzer is silenced by pressing BUZZER key 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. The example in the table is based on the assumption that the desired duration is 20 minutes. Note: The duration is set in 30 minutes at the factory. Table 6.
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 is actuated when the power cord is disconnected from the outlet or the power switch is OFF. REMOTE ALARM N.O. COM N.C.
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 lamp is lit when one of the running status shown in table 7 is detected. 2. The S code (--X, X: 1 to 3) is displayed on the temperature indicator by pressing STATUS key when the STATUS lamp is lit. 3. Pressing the STATUS key again causes current chamber temperature display on the temperature indicator.
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: • The delay time should be same for high stage side and low stage side compressors.
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 • 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 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. Turn off the back-up system if applicable. 2.
TROUBLESHOOTING If the unit malfunctions, check out the following before calling for service. The chamber is not cooled at all 1. The circuit breaker of power source is active. 2. The voltage is too low. (The status code “--2” is displayed. See page 22.) In this case, call an electrician. 3. The power switch is not ON. 4. The large amount of articles (load) is stored in the chamber at one time. (The status code “--3” is displayed. See page 22.) The cooling is poor 1. The ambient temperature is too high.
RECYCLE OF RECHARGEABLE 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. 1. 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.
SPECIFICATIONS Name Ultra-Low Temperature Freezer Model MDF-U32V External dimensions W670 x D875 x H1860 (mm) Internal dimensions W490 x D600 x H1140 (mm) Effective capacity 333 L Exterior Acrylic finish baked on zinc galvanized steel Interior Acrylic finish baked on zinc galvanized steel Outer door Acrylic finish baked on zinc galvanized steel Inner door ABS resin panel with stainless frame, 2 doors Shelf Stainless steel, 3 shelves (adjustable) W464 x D535 (mm), Load; 50 kg/shelf 17 mm d
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. Refrigerator contents : Risk of infection: Risk of toxicity: Risk from radioactive sources: □Yes □No □Yes □Yes □Yes □No □No □No (List all potentially hazardous materials that have been stored in this unit.) Notes : 2. Contamination of the unit Unit interior No contamination Decontaminated Contaminated Others: □Yes □No □Yes □Yes □Yes □No □No □No 3.
7FB6P10134200 Recycled paper SANYO Electric Biomedical Co., Ltd.
