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Hitachi RAC-25YHA2, Instruction Manual, Page: 1 / 20

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TYPE AIR CONDITIONER

MODEL

RAS-25YHA2/RAC-25YHA2

RAS-35YHA2/RAC-35YHA2

INDOOR UNIT/OUTDOOR UNIT

INDOOR UNIT

Instruction manual

Page 1~20

To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.

RAS-25YHA2

RAS-35YHA2

OUTDOOR UNIT

RAC-35YHA2

RAC-25YHA2

Summary of Contents for RAC-25YHA2

Page 1: ...25YHA2 RAS 35YHA2 RAC 35YHA2 INDOOR UNIT OUTDOOR UNIT INDOOR UNIT Instruction manual Page 1 20 To obtain the best performance and ensure years of trouble free use please read this instruction manual completely RAS 25YHA2 RAS 35YHA2 OUTDOOR UNIT RAC 35YHA2 RAC 25YHA2 ...

Page 2: ...cing of 1m between the supports Please ensure smooth flow of water when installing the drain hose If any failure is found in the drain path water drops from the indoor and outdoor units causing wet household effects Make sure that a single phase 240V power source is used The use of other power sources may cause electrical components to overheat and lead to fire PROHIBITION CONNECT EARTH LINE PROHI...

Page 3: ... cause danger Do not place plants or animals directly under the air flow as it is bad for the plants or animals Do not climb on the outdoor unit or put objects on it PROHIBITION PROHIBITION PROHIBITION DON T TOUCH DON T TOUCH When operating the unit with the door and windows opened the room humidity is always above 80 and with the air deflector facing down or moving automati cally for a long perio...

Page 4: ...outdoor unit is hung on the ceiling install the bush and drain pipe on the drain port and drain water MODEL WIDTH mm HEIGHT mm DEPTH mm RAS 25YHA2 RAS 35YHA2 780 280 220 RAC 25YHA2 700 505 258 750 548 288 RAC 35YH 2 A Air outlet When heating operation is performed cool air blows and when cooling or dehumidifying operation is performed warm air blows Drain hose Drains the dehumidified water from th...

Page 5: ... work This temporary operation will be at the most recent setting made The unit will immediately go into automatic operation once power is switched on CAUTION Turn off the circuit breaker or pull out the power plug if the unit is not be operated for a long period If the power stays on and the unit is not operated power is slightly consumed in the control circuit The power is saved by turning off t...

Page 6: ...TIMER control Use these buttons to set the timer OFF TIMER button Select the turn OFF time ON TIMER button Select the turn ON time RESERVE button Time setting reservation CANCEL button Cancel time reservation NAMES AND FUNCTIONS OF EACH PART REMOTE CONTROLLER This controls the operation of the indoor unit The range of control is about 7 meters If indoor lighting is controlled electronically the ra...

Page 7: ...T or COOL depending on the current room temperature When AUTO is first selected the device will determine the current room temperature and select the proper operation mode accordingly When the air conditioner has adjusted the room s temperature to the near preset temperature it will begin to monitor operation If the room temperature subsequently changes the air conditioner will once again select t...

Page 8: ... the air which blows out HI Economical as the room will become warm quickly But you may feel a chill at the beginning MED Quiet LOW More quiet SILENT Silent 2 Set the desired room temperature with the TEMPERATURE buttons the display indicates the setting The temperature setting and the actual room temperature may vary somewhat depending on conditions 3 As the settings are stored in memory in the r...

Page 9: ...he FUNCTION selector Set the desired temperature is available You also can use the FUNCTION selector to select this operation Dehumidifying Function Dehumidifying takes place with a target temperature which is slightly lower than the room temperature setting However target temperature is 16 C for a temperature setting of 16 C If the room temperature becomes lower than the target value operation st...

Page 10: ...rm on the air outlet grille of the indoor unit Press the FUNCTION selector so that the display indicates COOL 1 Set the desired FAN SPEED with the FAN SPEED button the display indicates the setting AUTO The FAN SPEED is HI at first and varies to MED automatically when the preset temperature has been reached HI Economical as the room will become cool quickly MED Quiet LOW More quiet SILENT Silent 2...

Page 11: ...e FAN SPEED button HI The strongest air blow MED Quiet LOW More quiet SILENT Silent 2 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 As room temperature reaches the preset temperature a very light breeze will blow Operation starts in the HI mode to r...

Page 12: ...d 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 OFF TIMER button so that the OFF mark blinks 2 Set the turn off time with the TIMER control button Pressthe RESERVE button PM 3 Press the ON TIMER button so that the OFF mark lights and the ON mark blink...

Page 13: ... The ON mark starts lighting instead of flashing and the RESERVED sign lights A beep occurs and the TIMER lamp lights on the indoor unit AM Example The device will turn on early so that the preset temperature be almost reached at 7 00 a m The setting of the turn on time is now complete 4 Set the turn on time with the TIMER control button 5 Point the signal window of the remote controller toward th...

Page 14: ...e display indicates the turn off time AM Example If you set 3 hours sleep time at 11 38 p m the turn off time is 2 38 a m Sleep timer Start The device will be turned off by the sleep timer and turned on by on timer 1 Set the ON timer 2 Press the SLEEP button and set the sleep timer AM AM For heating In this case the device will turn off in 2 hours at 1 38 a m and turn on early so that the preset t...

Page 15: ...ries 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 you do not use the remote controller for 2 or 3 months CAUTION Push and pull to the direction of arrow Vertical Vertical about 15 about 60 about 45 about 30 When cooling dehumidifying When heating If the AUTO SWING button is pressed once the horizontal a...

Page 16: ...1 Open the front panel carefully and remove the filter 2 Vacuum dust from the air filter using vacuum cleaner If there is too much dust wash the filter with a detergent and rinse it thoroughly After that dry it in the shade 3 Set the filter with FRONT mark facing front and slot them into the original state After attaching the filters push the front panel at three arrow portions as shown in figure ...

Page 17: ...front panel is fully opened with both hands push the right arm to the inside to release it and while closing the front panel slightly put it out forward Move the shafts of the left and right arms into the steps in the unit and securely insert them into the holes Shaft Step Hole Do not splash or direct water to the body of the unit when cleaning it as this may cause short circuit Never use hot wate...

Page 18: ...tons are released the indication of settings will go off in 10 seconds and only the operation mode will be displayed Pressing the button while the unit is in operation will let the protective circuit work so that the unit will not operate for approximately 3 minutes During heating operation the indoor unit s color indicator lamp may flash with no air emitted for a while If you feel cold wind durin...

Page 19: ... mode selected Are the air inlets or air outlets of indoor and outdoor units blocked Is the fan speed LOW or SILENT When it does not operate When it does not cool well When it does not heat well If the remote controller is not transmitting a signal Remote controller display is dim or blank The following phenomena do not indicate unit failure Operation start The unit is preparing to blow warm air P...

Page 20: ... according to room temperature changes Mist is generated as the air within the room is suddenly cooled by conditioned air Water generated during defrosting operation evaporates and steam is emitted Caused as the smells and particles of smoke food cosmetics etc present in room air become attached the unit and blown off into the room again Defrosting is underway as the heating operation is stopped t...

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