Hitachi RAK-18NHA2 Instruction Manual Download Page 1

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SPLIT TYPE AIR CONDITIONER

INDOOR UNIT

RAK-18NHA2
RAK-25NHA2
RAK-35NHA2
RAK-50NHA2

INDOOR UNIT

MODEL

RAK-18NHA2
RAK-25NHA2
RAK-35NHA2
RAK-50NHA2

RAK-18-25-35-50NHA2-1 1

6/3/14 11:25 AM

Summary of Contents for RAK-18NHA2

Page 1: ... 1 SPLIT TYPE AIR CONDITIONER INDOOR UNIT RAK 18NHA2 RAK 25NHA2 RAK 35NHA2 RAK 50NHA2 INDOOR UNIT MODEL RAK 18NHA2 RAK 25NHA2 RAK 35NHA2 RAK 50NHA2 ...

Page 2: ...r if you remove and reinstall the unit yourself improperly If the supply cord is damaged it must be replaced by the special cord obtainable at authorized service parts centers W A R N I N G During thunder storm disconnect and turn off the circuit breaker WARNING PRECAUTIONS DURING INSTALLATION Do not reconstruct the unit Water leakage fault short circuit or fire may occur if you reconstruct the un...

Page 3: ...er will condense on the air deflector and drips down occasionally This will wet your furniture Therefore do not operate under such condition for a long time If the amount of heat in the room is above the cooling or heating capability of the unit for example more people entering the room using heating equipments and etc the preset room temperature cannot be achieved This appliance is not intended f...

Page 4: ...let Remote controller Send out operation signal to the indoor unit So as to operate the whole unit Refer page 8 9 MODEL NAME AND DIMENSIONS Air purifying filters are not washable It is recommended to use vacuum to clean it It can be use for 1 year time Type number for this air purifying filter is SPX CFH22 Please use this number for ordering when you want to replace it NOTE RAK 18NHA2 RAK 25NHA2 R...

Page 5: ...ing 1 During preheating For about 2 3 minutes after starting up 2 During defrosting Defrosting will be performed about once every one hour when frost forms on the heat exchanger of the outdoor unit for 5 10 minutes each time TIMER LAMP This lamp lights when the timer is working TEMPORARY SWITCH Use this switch to start and stop when the remote controller does not work By pressing the temporary swi...

Page 6: ...if the remote controller display begins to fade and degradation of reception performance occurs within a year replace both batteries with new size AAA LR03 alkaline The attached batteries are provided for the initial use of the system The usable period of the batteries may be short depending on the manufactured date of the air conditioner Notes on the remote controller Never expose the remote cont...

Page 7: ...s RESET button 2 Direct remote controller towards indoor unit and press INFO button 3 The calendar and clock from indoor unit will be transmitted Calendar and clock will not be transmitted from indoor unit when the following occurs When there is a power failure When breaker is OFF by user unit is not in STANDBY MODE NOTE Note on setting the calendar and clock If the calendar and clock are not set ...

Page 8: ... pressing any button the LCD will turn on The LCD will not turn off during TIMER setting Signal Transmitting Receiving Window Point this window towards the indoor unit when controlling it Sensor A temperature sensor inside the remote controller senses ambient temperature around the remote controller Display This indicates the room temperature selected current time timer status function and airflow...

Page 9: ... Use this button to set the POWERFUL mode p 15 INFORMATION Button p 29 ONE TOUCH CLEAN Button p 19 ON OFF TIMER setting Buttons p 20 MODE selector Button Use this button to select the operating mode Every time you press this button the mode will change from AUTO HEAT DEHUMIDIFY COOL and FAN cyclically SILENT Button Use this button to set the SILENT mode p 16 AUTO SWING Vertical Button Controls the...

Page 10: ...vailable when Timer or Sleep Timer mode is set As the settings are stored in the memory of the remote controller you only have to press the START STOP button next time Press the MODE selector button so that the display indicates the AUTO mode of operation When AUTO has been selected the device will automatically determine the mode of operation HEAT or COOL depending on the current room temperature...

Page 11: ...peration As the settings are stored in the memory of the remote controller you only have to press the START STOP button next time During AUTO fan the fan speed automatically changes as below When the difference between room temperature and setting temperature is large fan starts to run at HI speed After room temperature reaches the preset temperature fan speed will be changed to lower speed to obt...

Page 12: ...itions Set the desired room temperature with the ROOM TEMPERATURE setting buttons the display indicates the setting The range of 20 26 C is recommended as the room temperature for dehumidifying Press the START STOP button Dehumidifying operation starts with a beep Press the button again to stop operation As the settings are stored in the memory of the remote controller you only have to press the S...

Page 13: ...perature fan speed will be changed to lower speed to obtain optimum room temperature condition for natural healthy cooling START STOP 1 2 3 Set the desired FAN SPEED with the FAN SPEED button the display indicates the setting AUTO HIGH MED SILENT LOW Set the desired room temperature with the TEMPERATURE buttons the display indicates the setting The temperature setting and the actual room temperatu...

Page 14: ... Swing To cancel Horizontal Auto Swing Press AUTO SWING VERTICAL button The deflector s will start to swing up and down is displayed on the LCD Press AUTO SWING HORIZONTAL button The deflectors will start to swing right and left is displayed on the LCD Press AUTO SWING VERTICAL button again The deflector s will stop in the current position disappeared from the LCD Press AUTO SWING HORIZONTAL butto...

Page 15: ...es with the previous settings used before POWERFUL operation Press the START STOP button Or Press POWERFUL button again POWERFUL operation stops disappears from the LCD 1 NOTE When SLEEP mode ECO mode SILENT mode or LEAVE HOME mode is selected POWERFUL operation is cancelled During POWERFUL operation capacity of the air conditioner will not increase if the air conditioner is already running at max...

Page 16: ...Press SILENT button again or FAN SPEED button Fan speed will return to previous fan speed before SILENT operation starts SILENT operation stops disappears from the LCD 1 NOTE When POWERFUL operation is selected SILENT operation is cancelled Fan speed will return to previous fan speed before SILENT operation After auto restart SILENT operation is cancelled Fan speed will return to previous fan spee...

Page 17: ...changing the set temperature higher or lower automatically and reducing operation power consumption This function may vary based on the connected outdoor unit Press START STOP button Or Press ECO button again disappears from the LCD NOTE ECO function will not be effective when power consumption is low By pressing POWERFUL button ECO operation is cancelled After auto restart ECO operation is cancel...

Page 18: ...T STOP button Or Press LEAVE HOME button again Return to previous operation mode Or Change to other operation mode by pressing MODE button NOTE After reaching the set number of operation days for Leave Home or by pressing the Leave Home button again the unit will operate in previous mode During Leave Home operation fan speed and horizontal air deflector position cannot be changed By pressing Leave...

Page 19: ... START STOP button Or Press CLEAN button again 1 NOTE When CLEAN operation finish unit will switch OFF automatically If Weekly Timer or Once Timer is set there is a need to cancel those timer before operating CLEAN function For multi connections when pressing CLEAN button operation is limited to FAN operation For multi connections when one room operates CLEAN operation first other rooms can operat...

Page 20: ...uence of switching operations 1 Press OFF TIMER button so that and blink on the display 2 Set the turn off time with TIME button After setting direct the remote controller towards the indoor and press SEND button 3 Press ON TIMER button so that and set turn off time light up The and blink 4 Set the turn on time with TIME button 5 After setting direct the remote controller towards the indoor and pr...

Page 21: ...from indoor unit and the TIMER lamp on the indoor unit lights up Pressing SLEEP button repeatedly the number of hours will change as below During ECO SLEEP TIMER operation air conditioner will continue to operate for the designated number of hours and then turn off When the ECO SLEEP TIMER has been set the display on the remote controller indicates the turn off time Press START STOP button Room ai...

Page 22: ...our after setting ECO SLEEP TIMER set temperature will be slightly shifted Amount of temperature shifted depends on type of air conditioner These automatic operation changes contribute to energy saving without losing comfort The level of energy consumption depends on outside temperature room temperature set temperature or air conditioner type Cooling operation diagram representation for illustrati...

Page 23: ...hanged day Mon program no 1 ON OFF setting time and setting temperature blink on the display 3 Select the desired day of the week Press DAY button The day changes from Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Full days Mon Tue Wed Thu Fri weekday Sat Sun weekend Mon Tue Select Full days for daily reservation Select weekday for Monday to Friday reservation Select weekend for Saturday...

Page 24: ...en completed The reservation contents will appear on the remote controller display If TIMER lamp on the indoor unit does not light up press SEND button while directing the remote controller towards the indoor unit for about 3 seconds CAUTION Do not press CANCEL button during reservation setting because this will result in all reservation contents to be lost The reservation contents will not stored...

Page 25: ...ds the indoor unit and press CANCEL button Beep sound will be emitted from indoor unit and TIMER lamp will be OFF Reservation indication on remote display will also disappear This indicates that non active WEEKLY TIMER has been confirmed To activate back the setting of WEEKLY TIMER repeat the steps for How to select Mode A or Mode B of WEEKLY TIMER setting NOTE When setting ONCE TIMER operation of...

Page 26: ...on one more time to paste only blinks on the display 7 To continue copying to other days press or or or Then start from step 3 8 After copy and paste completed press SEND button while directing the remote controller towards the indoor unit for about 3 seconds Timer lamp on the indoor unit will blink rapidly After beep sound emitted from indoor unit TIMER lamp will light up Please ensure that the T...

Page 27: ... Press to select program number Selected program number will blink 5 Press DELETE button Reservation of selected program number is deleted 6 After deleting press SEND button while directing the remote controller towards the indoor unit for about 3 seconds Timer lamp on the indoor unit will blink rapidly After beep sound emitted from indoor unit TIMER lamp will light up Please ensure that the TIMER...

Page 28: ...indoor unit will blink rapidly After beep sound emitted from indoor unit TIMER lamp will light up Please ensure that the TIMER lamp lights up Reservation will not change if SEND button is not pressed 1 1 2 NOTE If all reservations in the remote controller were deleted and pressed SEND button no signal will be transmitted to indoor unit TIMER lamp will remain off and no changes will be done to the ...

Page 29: ...O button Wait for 2 seconds for signal transmission While temperature around remote controller is displayed press INFO button repeatedly The display will show as below this month power consumption amount for heating last month power consumption amount for heating this month power consumption amount for cooling last month power consumption amount for cooling temperature around remote controller thi...

Page 30: ...will remain This indicates that COOLING and DEHUMIDIFYING mode operation is locked When pressing MODE button or will be displayed Method to unlock COOLING and DEHUMIDIFYING modes including FAN operations Press ECO and SILENT buttons simultaneously for about 5 seconds when the remote controller is OFF All operation mode symbols will appear on the display for about 10 seconds After that operation mo...

Page 31: ...should be as below Cooling Heating Minimum Maximum Minimum Maximum Indoor Dry bulb C 21 32 20 27 Wet bulb C 15 23 12 19 Outdoor Dry bulb C 21 43 2 21 Wet bulb C 15 26 1 15 CIRCUIT BREAKER When you do not use the room air conditioner set the circuit breaker to OFF ...

Page 32: ...with your wake up time in the morning This will enable you to enjoy a comfortable room temperature Please use the timer effectively Dusty pre filter will reduce the air volume and the cooling efficiency To prevent from wasting electric energy please clean the filter every 2 weeks Please pay attention to the room temperature and air flow direction when operating the unit for baby children and old f...

Page 33: ... used for a long period of time please switch off the power from the mains If the power from mains remains ON the indoor unit still consumes about 8W in the operation control circuit even if it is in OFF mode Warning To protect the whole unit during lightning please stop operating the unit and remove the plug from the socket Interference From Electrical Products Caution To avoid noise interference...

Page 34: ...push the front panel at three arrow portions as shown in figure and close it Cleaning and maintenance must be carried out when filter lamp lights Before cleaning stop operation and switch off the power supply CAUTION CAUTION Do not bend the air purifying filter as it may cause damage to the structure Please do not smell direct from source of filter NOTE In case of removing the air purifying filter...

Page 35: ...from the pre filter frame 2 Vacuum dust from the pre filter and air purifying filter using vacuum cleaner If there is too much dust rinse under running tap water and gently brush it with soft bristle brush Allow pre filters to dry in shade 3 Re insert the air purifying filter to the pre filter frame Set the pre filter with FRONT mark facing front and slot them into the original state After attachi...

Page 36: ...e front panel with both hands to detach and attach it CAUTION Do not splash or direct water to the body of the unit when cleaning it as this may cause short circuit Never use hot water above 40 C benzine gasoline acid thinner or a brush because they will damage the plastic surface and the coating Removing the Front Panel When the front panel is fully opened with both hands push the right arm to th...

Page 37: ...able Is the plug of power line firmly plugged into the socket Please ensure no loose contact between them Cleaning and maintenance must be carried out only by qualified service personnel Before cleaning stop operation and switch off the power supply CAUTION 3 MAINTENANCE BEFORE LONG OFF PERIOD Run the unit by setting the operation mode to COOL the temperature to 32 C and the fan speed to HI for ab...

Page 38: ... possibly be emitted from the room air conditioner because the various odor emitted by smoke foodstuffs cosmetics and so on sticks to it So the pre filter and the evaporator regularly must be cleaned to reduce the odor Please contact your sales agent immediately if the air conditioner still fails to operate normally after the above inspections Inform your agent of the model of your unit production...

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Hitachi RAK-18NHA2, Instruction Manual

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