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INSTRUCTION MANUAL
MDF-U7486S
MDF-U7486SC
MDF-U5486S
Ultra-Low Temperature Freezer
MDF-U5486SC
MDF-U7486S
- 42 -
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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
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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.
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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 ser
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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. If the floor is not strong enough or the installation site is not
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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 dam
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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 ca
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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; o o Ambient temperature 5 C to 40 C o Maximum relative humidity 80% for temperature up to 31 C decreasing linearly to 50% relative humidity o at 40 C; Mains supply voltage fluctuations not to exceed #10% of the nominal voltage; Other supply voltage fluctuations as stated by the manufacturer;
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FREEZER COMPONENTS 13 1 2 3 14 4 13 (inside) 5 12 6 7 15 9 (inside) 8 11 10 16 17 18 19 Power cord Rear side - 50 - 8
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FREEZER COMPONENTS 1. Outer door: To open the outer door, grip the handle. On closing, lock the outer door latch completely. 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.
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FREEZER COMPONENTS Control panel 2 1 3 4 9 8 7 6 5 1. Digital temperature indicator: This indicator shows the present chamber temperature or set temperature. 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
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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. Poor ventilation will result in a reduction of the per
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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 cl
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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. Check that the chamber tempera
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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 o temperature is -75 C. o Note: The unit is set at the factory that the chamber temperature -80 C. o Table 1. Basic operation sequence (Example: Chamber temperature -75 C) Description of operation Key operated Indication after operation The current
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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: o High temperature alarm: activates at the temperature 5 C higher than the set temperature o Low temperature alarm: activates at the temperature 5 C lower than the set temperature Note: o The alarm temperature is set at the
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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. Note: The duration i
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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.) The buzzer will
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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. The cool down of chamber temperature may be slow w
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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 Situation Indication Buzzer Safety functions If the chamber temperature is higher High temperature than the temperature at which the alarm Alarm lamp is flashed. high temperature alarm is activated. Intermittent tone with Remote alarm with 15 Temperature indicator is 15 minutes delay. minutes delay. If the cham
