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Hitachi RAC25NH4 manual

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Table of contents for the manual

  • Page 1

    RAC25NH4/RAK25NH4 RAC35NH4/RAK35NH4 RAC50NH4/RAK50NH4 RAC25NH4 RAC35NH4 RAC50NH4 RAK25NH4 RAK35NH4 RAK50NH4[...]

  • Page 2

    – 1 – ! SAFETY PRECAUTION ● Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit. ● Pay special attention to signs of “ Warning ” and “ Caution ”. The “Warning” section contains matters which, if not observed strictly, may cause death or serious injury. The “Caution”[...]

  • Page 3

    – 2 – PRECAUTIONS DURING OPERA TION ● Do not attempt to operate the unit with wet hands, this could cause fatal accident. ● When operating the unit with burning equipments, regularly ventilate the room to avoid oxygen insufficiency. ● Do not direct the cool air coming out from the air-conditioner panel to face household heating apparatus [...]

  • Page 4

    – 3 – INDOOR UNIT NAMES AND FUNCTIONS OF EACH P AR T Air filter To prevent dust from coming into the indoor unit. (Refer page 25) Front panel Indoor unit indicators Light indicator showing the operating condition. (Refer page 9) Horizontal deflector ● Vertical deflector (Air Outlet) (Refer page 20) Remote controller Send out operation signal [...]

  • Page 5

    – 4 – INDOOR UNIT INDICA TORS TEMPORARY SWITCH ● Use this switch to start and stop when the remote controller does not work. ● By pressing the temporary switch, the operation is done in automatic mode. OPERA TION INDICA TOR ● This figure shows the opening condition of front panel. Refer to page 24 in relation to how to open or close the f[...]

  • Page 6

    – 5 – AUTO HEAT DEHUMIDIFY COOL FAN FAN SPEED LOW MED HI SLEEPING STOP (CANCEL) START (RESERVE) START/STOP TIME TIMER SET TIMER SELECTOR ON TIMER OFF TIMER AUTO SWING ˚ CH RESET ˚ CH NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT REMOTE CONTROLLER ● This controls the operation of the indoor unit. The range of control is about 7 meters. If indoo[...]

  • Page 7

    – 6 – AUTOMA TIC OPERA TION The device will automatically determine the mode of operation, HEAT, COOL or DEHUMIDIFY depending on the initial room temperature. The selected mode of operation will not change when the room temperature varies. ■ As the settings are stored in memory in the remote controller, you only have to press the (START/STOP)[...]

  • Page 8

    – 7 – HEA TING OPERA TION ● Use the device for heating when the outdoor temperature is under 21 ° C. When it is too warm (over 21 ° C), the heating function may not work in order to protect the device. Press the FUNCTION selector so that the display indicates (HEAT). Set the desired FAN SPEED with the (FAN SPEED) button (the display indicat[...]

  • Page 9

    – 8 – DEHUMIDIFYING OPERA TION Use the device for dehumidifying when the room temperature is over 16 ° C. When it is under 15 ° C, the dehumidifying function will not work. ■ Dehumidifying Function When the room temperature is higher than the temperature setting: The device will dehumidify the room, reducing the room temperature to the pres[...]

  • Page 10

    – 9 – ˚ C RESET ˚ C COOLING OPERA TION Use the device for cooling when the outdoor temperature is 22-42 ° C. If in doors humidity is very high (80%), some dew may form on the air outlet grille of the indoor unit. Press the FUNCTION selector so that the display indicates (COOL). Set the desired FAN SPEED with the (FAN SPEED) button (the displ[...]

  • Page 11

    – 10 – FAN SPEED (AUTO) ..... When the AUTO fan speed mode is set in the cooling/heating operation: For the heating operation ● The fan speed will automatically change according to the temperature of discharged air. ● When the difference of room temperature and setting temperature is large, fan starts to run at HI speed. ● When the room t[...]

  • Page 12

    – 11 – HOW TO SET THE TIMER ON/OFF-Timer ● The device will turn on (off) and off (on) at the designated times. ● The switching occurs first at the preset time that comes earlier. ● The arrow mark appearing on the display indicates the sequence of switching operations. 1 Press the (ON-OFF) button so that the (OFF) mark blinks. OFF-Timer Yo[...]

  • Page 13

    – 12 – 3 Point the signal window of the remote controller toward the indoor unit, and press the (RESERVE) button. The (OFF) mark starts lighting instead of flashing and the sign (RESERVED) lights. A beep occurs and the (TIMER) lamp lights on the indoor unit. ● The time indication will disappear automatically in 10 second. ● To check the cur[...]

  • Page 14

    – 13 – HOW TO SET THE SLEEP TIMER 1 Set the ON-timer. Set the current time at first if it is not set before (see the pages for setting the current time). Press the (SLEEP) button, and the display changes as shown below . Mode Sleep timer Indication 1 hour 2 hours 3 hours 7 hours Sleep timer off 44 4 4 1 Sleep Timer: The device will continue wor[...]

  • Page 15

    – 14 – Cooling “ ” and dehumidifying “ ” Explanation of the sleep timer The device will control the F AN SPEED and room temperature automatically so as to be quiet and good for people ’ s health. Y ou can set the sleep timer to turn of f after 1, 2, 3 or 7 hours. The F AN SPEED and room temperature will be controlled as shown below . [...]

  • Page 16

    – 15 – ADJUSTING THE AIR DEFLECTOR 1 2 Adjustment of the conditioned air to the left and right. Hold the vertical air deflector as shown in the figure and adjust the conditioned air to the left and right. ● If the “ (AUTO SWING)” button is pressed once, the horizontal air deflector swings up and down. If the button is pressed again, the d[...]

  • Page 17

    – 16 – HOW TO EXCHANGE THE BA TTERIES IN THE REMOTE CONTROLLER 1 Remove the cover as shown in the figure and take out the old batteries. = 2 Install the new batteries. The direction of the batteries should match the marks in the case. 1. Do not use new and old batteries, or different kinds of batteries together. 2. Take out the batteries when y[...]

  • Page 18

    – 17 – Suitable Room T emperature Install curtain or blinds V entilation Effective Usage Of Timer Do Not Forget T o Clean The Air Filter Please Adjust Suitable T emperature For Baby And Children Warning Freezing temperature is bad for health and a waste of electric power. ! It is possible to reduce heat entering the room through windows. At nig[...]

  • Page 19

    – 18 – FOR USER’S INFORMA TION The Air Conditioner And The Heat Source In The Room Not Operating For A Long T ime When Lightning Occurs Caution If the amount of heat in the room is above the cooling capability of the air conditioner (for example: more people entering the room, using heating equipments and etc.), the preset room temperature ca[...]

  • Page 20

    – 19 – A TT ACHING THE AIR CLEANSING AND DEODORIZING FIL TERS 1 Open the front panel. ● Pull up the front panel by holding it at both sides with both hands. 2 Remove the filter. ● Push upward to release the claws and pull out the filter. 3 Attaching the air cleansing and deodorizing filters to the filter. ● Attach the air cleansing and de[...]

  • Page 21

    – 20 – MAINTENANCE Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning, stop operation and switch off the power supply. 1. AIR FILTER Clean the air filter, as it removes dust inside the room. In case the air filter is full of dust, the air flow will decrease and the cooling capacity will be reduced. [...]

  • Page 22

    – 21 – 2. Washable Front Panel ● Remove the front panel and wash with clean water. Wash it with a soft sponge. After using neutral detergent, wash thoroughly with clean water. ● When front panel is not removed, wipe it with a soft dry cloth. Wipe the remote controller thoroughly with a soft dry cloth. ● Wipe the water thoroughly. If water[...]

  • Page 23

    – 22 – 3. MAINTENANCE AT BEGINNING OF 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 about half a day on a fine day, and dry the whole of the unit. ● Switch off the power plug. 1 2 3 REGULAR INSPECTION PLEASE CHECK THE FOLLOWING POINTS BY QUALIFIED SERVICE PERSO[...]

  • Page 24

    – 23 – AFTER SALE SERVICE AND W ARRANTY WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS. When it does not operate ● Is the fuse all right? ● Is the voltage extremely high or low? ● Is the circuit breaker “ ON ” ? ● Was the air filter cleaned? ● Does sunlight fall directly on the outdoor unit? ● Is the air flow of the outdoor[...]

  • Page 25

    Hitachi, Ltd. Tokyo, Japan International Sales Division THE HITACHI ATAGO BUILDING, No. 15 – 12 Nishi Shinbashi, 2 – Chome, Minato – Ku, Tokyo 105 - 8430, Japan. Tel: 03 35022111 HITACHI EUROPE LTD, Whitebrook Park Lower Cookham R oad Maidenhead Berkshire SL6 8YA UNITED KINGDOM Tel: 01628 643000 Fax: 01628 643400 Email: consume r - service@hi[...]