5PRECAUTIONS• Refer all work related to the installation of theseproducts to qualified service personnel or systeminstallers.• Do not operate the appliances beyond their speci-fied temperature, humidity, or power source ratings.Use the appliance at temperatures within +5 °C -+45 °C (41 °F - 113 °F) and humidity below 85 %.The input power source for this appliance is 220 V -240 V AC 50 Hz.Performance and lifetime of hard disk drives are easilyaffected by heat (used at high temperature) character-istically. It is recommended to use this appliance attemperatures within +20 °C - +30 °C (68 °F - 86 °F).• Handle the appliance with care.Do not strike or shake, as this may damage the appli-ance.• Do not strike or give a strong shock to the unit.It may cause damage or allow water to enter the unit.• Built-in backup batteryBefore the first use, charge the built-in backup battery(lithium battery) by turning on the power for 48 hours ormore.If it is not charged enough, in a case where the powergoes down, the internal clock may keep bad time or theoperative condition may be different to that before theelectric power failure.The built-in battery life is approximately 5 years as anindication of replacement. (This is just an indication ofreplacement. We are not providing any guarantee of thebuilt-in battery lifetime. Replacement cost of the built-inbattery is not covered by the warranty even if it needsto be done within the warranty period.) Ask the shopwhere you purchased the unit when replacement of thebattery is required.• Cooling FanTurn the power off when cleaning the unit. Otherwise itmay cause injuries.Replacement costs of the cooling fan are not coveredby the warranty even if it needs to be done within thewarranty period. Consult your dealer for servicing.• CleaningTurn the power off when cleaning the unit. Otherwise itmay cause injuries.Do not use strong or abrasive detergents when clean-ing the appliance body.Use a dry cloth to clean the appliance when it is dirty.When the dirt is hard to remove, use a mild detergentand wipe gently.• Indication labelRefer to the indication labels placed on the top and but-tom of the unit as to the indications of equipment classi-fication and power source, etc.• Built-in hard disk drivesHard disk drives are vulnerable to vibration. Handlethem with care.It is possible to damage them if they are moved whiletheir motors are still running. Do not move them justafter turning their power on or off (for around 30 sec-onds).Hard disk drives are perishable. They will need to bereplaced after around 20 000 - 30 000 hours of opera-tion in case they are used at temperature of 25 °C(77 °F).Replacement costs of the hard disk drives are not cov-ered by the warranty even if it needs to be done withinthe warranty period. Consult your dealer for servicing.When hard disk drive trouble occurs, replace it immedi-ately. Consult your dealer for servicing.When replacing the hard disk drives, take notice of thefollowing.Do not detach the hard disk drives or the cables con-necting the unit and the front cover while theHDD1/HDD2 indicators are lit or for around 30 secondsafter the indicators go off.Protect the hard disk drives from static electricity.Do not stack them, or keep them upright.Do not use an electric screwdriver to fix them.(Tightening torque: Approx. 0.49 N · m (5 kgf · cm))Avoid rapid changes of the temperature/humidity toprevent condensation. (Acceptable change: within15 °C/h (59 °F/h))• Avoid placing receptacles that contain liquids such aswater near the unit.If liquid spills onto the unit, it may cause fire or an elec-tric shock.• Do not expose the unit to water or moisture, or try tooperate it in wet areas.• Prevent condensation from forming on the surface ofthe hard disk.If this happens, do not turn on the power of the recorderand leave the recorder for around 2 hours.Wait until the dew evaporates in any of the followingcases:• The recorder is placed in an extremely humid place.• The recorder is placed in a room where a heater hasjust been turned on.• The recorder is moved from an air-conditioned roomto a humid and high-temperature room.• We recommend that you make a note of your settingsand save them. This will help when you are required tochange the system configuration, or when unexpectedtrouble or failure occurs.• Distributing, copying, disassembling, reverse compil-ing, reverse engineering, and also exporting in violationof export laws of the software provided with this prod-uct, is expressly prohibited.