1 - Service aer conditionat
Contents
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3. ONIONIMS LYVLS OLNV 7009 1009 NOILVH3dO LNSAWOW LV 3015 ONIMS NOILLVH3dO LXAN LV 371 D 401937430 SNISO12 SNIMS 3015 3GQON HOV3 LAdNI A3M 50 2434 NOI LVOIdIO3dS AGOW NOILVH3dO NOILVH3dO NOILIGNOO 1N3S3Hd NOILONNA S9NIMS OLNV IVNDIS LONI 53 SERVICE CALLQ amp A Cooling operation While cooling the compressor sometimes stops abruptly Check whether frost sticks on the heat exchanger of in door unit or not Wait for 3 4 minutes until If cooling is performance when the room temperature is low frost may stick on the heat exchanger of indoor 2 Dehumidifying operation The fan speed does change during a dehumidifying operation 2 Cold comes out during a dehumidifying operation 2 lo 3 2 The operation does not stop even by raising the room temperature setting of remote control at a dehumidifying operation 2 e In the dehumidifying mode the temperature set by remote controller is set slightly higher than the room temperature but the operation starts the frost melts
4. 7177 w fill 0 HIT oop MODEL NAME AND DIMENSIONS 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 to the indoor unit So as to operate the whole unit Refer page 10 Drain pipe Condensed water drain to outside Connecting cord and insulation pipe for piping Air inlet Back Left side Air outlet Drain pipe Condensed water drain to outside Connecting cord and insulation pipe for piping Air inlet Back and Left side Air outlet A CAUTION When heating operation drain or defrosted water flows out from outdoor unit Don t close drain outlet portion in chilly area so as not to freeze these MODEL WIDTH mm HEIGHT mm DEPTH mm RAS 07GH4 09GH4 14GH4 780 280 210 RAC 07GH4 09GH4 700 570 210 v RAC 14GH4 750 570 280 8 INDOOR UNIT INDICATORS 4 9 0 SWITCH 000000 000000 OPERATION INDICATOR Temp
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9. 0 ADJUSTING THE AIR DEFLECTOR 1 Adjustment of the conditioned air in the upward and downward directions The horizontal air deflector is automatically set to the proper angle suitable for each operation The deflector can be swung up and down continuously and also set to the desired angle using the AUTO SWING button e If the AUTO SWING button is pressed once the horizontal air deflector swings up and down If the button is pressed again the deflector stops in its current position Several seconds about 6 seconds may be required before the deflector starts to move When cooling Use the horizontal air deflector within the adjusting range ol dehumidifying shown on the right Vertical about 15 e When the operation is stopped the horizontal air deflector moves and stops at the position where the air outlet closes about 60 A CAUTION e In Cooling operation do not keep the horizontal air deflector swinging for a long time Some dew may form on the horizontal air deflector and dew may drop When heating Vertical 2 Adjustment of the conditioned air to the left and right about 45 Hold the vertical air deflector as shown in the figure and adjust the conditioned air to the left and right A CAUTION When operating the unit in cooling operation with the air deflector faci
10. 24 COOLING OPERATION Use the device for cooling when the outdoor temperature is 22 42 C If indoor humidity is very high over 80 some dew may form on the air outlet grille of the indoor unit HITACHI Press the FUNCTION selector so that the display indicates COOL Set the desired FAN SPEED with the FAN SPEED button the display indicates the setting ty AUTO The FAN SPEED is at first and varies to MED automatically when the preset temperature has been reached Wi lt HI Economical as the room will become cool quickly MED Quiet 00 LOW More quiet Set the desired room temperature with the TEMPERATURE button the display indicates the setting 3 5 The range of 25 28 C is recommended as the lec room temperature for cooling If the temperature setting is 27 C the room temperature will be controlled at around 27 C HITACHI n The temperature setting and the actual room temperature may vary some how depending on conditions Press the START STOP button Cooling operation starts with a beep Press the button again to stop operation The START cooling function does not start if the temperature setting is higher than the current room temperature even though STOP OPERATION lamp lights The cooling function will start as soon as you set the temperature below the current room
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13. 4 Wait for 3 minutes before forced re operation by the service switch Replace faulty part Check the circuit board inside parts When checking carry out a self diagnosis by indoor indicator lamp 8 CN6 BLUE RED RAS 07GH4 RAS 09GH4 RAS 14GH4 RAC 07GH4 RAC 09GH4 RAC 14GH4 Fan Speed Cool Heat Cool Heat Cool Heat HI 20 8 20 8 21 3 23 0 27 0 28 4 MED 15 6 17 9 18 0 19 7 20 9 23 6 LO 12 5 15 0 13 7 16 6 15 8 19 3 SLEEP MODE 11 0 15 0 11 9 16 6 13 0 19 3 61 Timer Lamp break down checking in blinking sign Check the break down factor from the frequency of timer lamp blinking No Mode of Timer Lamp blinking Indication Factor Estimated Break Down Part 4 way valve not working 1 4 way valve is not working Inside temperature is low in heating Pe 1 time operation time or inside 2 Heat exchanger thermistor is temperature is high in cooling in disconnection operation time Only heating time Force cooling operation Check force cooling switch at Unit is under forcible operation indoor electrical 2 2 times under balancing after forcible operation DC Fan motor over flow of 1 Indoor Fan is locked electricity 5 i 2 2 Indoor Fan motor damage 3 so 10 times Indoor DC Fan motor has over flow of electricity 3 Indoor control circuit board
14. HITACHI Indication Sleep timer 2 hour 2 hours hours 7 hours Sleep timer off 2 A Sleep Timer The device will continue working for the designated number of hours and then turn off e SLEEP Point the signal window of the remote controller toward the indoor unit and press the SLEEP button The timer information will be displayed on the remote controller The TIMER lamp lights with a beep from the indoor unit When the sleep timer has been set the display indicates the turn off time r Example If you set 3 hours sleep B time 11 38 p m the turn off l time is 2 38 a m P Sleep The device will be turned off by the sleep umer 28 timer and turned on by on timer 1 Set the ON timer 2 Press the SLEEP button and set the sleep timer 1 Example In this case the device will turn off Lu 1 9 in 2 hours at 1 38 a m and turn on early so that the preset 77 temperature will be almost reached LI L L at 6 00 next morning How to Cancel Reservation Point the signal window of the remote controller toward the indoor unit and press the O CANCEL button The RESERVED sign goes out with a beep and the TIMER lamp turns off on the indoor unit 18 Explanation of the sleep timer The device will control the FAN SPEED and room temperature automatically so
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17. S TANK CONDENSER T A A 3S VALVE REVERSING 62 VALVE T s EVAPORATOR f T CAPILLARY HEATING amp T m COOLING U STRAINER CAPILLARY 2S VALVE 5 CHARGING CHECK VALVE STRAINER PIPE 47 MODEL RAS 09GH4 RAC 09GH4 S TANK CONDENSER C ACCUMULATOR 3S VALVE REVERSING VALVE gt lt _9 lt _ gt lt _3 9 C C 3 9 rm A HEATING Y COOLING D STRAINER CAPILLARY 2S VALVE gt f 00 CHARGING CHECK VALVE STRAINER PIPE 48 DESCRIPTION OF MAIN CIRCUIT OPERATION 1 ON OFF The ON OFF and Timer reserve button and Sleeping function independently Their operations are shown in Fig 1 1 Start Stop Start ON OFF button Timer reserve button When leering timer sleeping is set Operation lamp Timer lamp OFF time Start Stop ON OFF button Timer reserve button When ON timer is set Operation lamp Timer lamp ON time Fig 1 1 Timer operation 49 2 Reset Circuit 5V 12V 4 Micro computer 53 AX 3U Q512 Q
18. pressing the room temperature control button V causes no transmission At 32 pressing A causes no transmission either When the Automatic operation mode is selected Automatic does not change by pressing the fan speed select button The room temperature is not displayed Pressing the room temperature control button develops transmit mark and sounds receive sound but does not display the room temperature setting The timer cannot be set The current time disap pears soon 1 When the operation mode is Automatic the fan speed is automatically fixed to Automatic 2 At an Automatic operation the room temperature setting is not displayed The room temperature is automatically set as follows At cooling Set at 27 C At dehumidifying Set to a temperature slightly lower than the room temperature At heating Set at 23 C 3 At Automatic operation the room temperature setting is not displayed However every pressing A or V button changes 1 C within the range of 27 3 C when cooling 23 3 C when heating The room temperature is settable within the range of 16 32 and not beyond Is the current time set The timer cannot be set unless the clock is adjusted correctly The room temperature sens
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20. 26 N CAUTION e Please use earth line Do not place the earth line near water or gas pipes lightning conductor or the earth line of telephone Improper installation of earth line may cause electric shock e A circuit breaker should be installed depending on the mounting site of the unit Without a circuit breaker the danger of electric shock exists IMPORTANT The wires in this mains lead are coloured in accordance with the following code Green and yellow Earth Blue Neutral Brown Live As the colours of the wires in the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug proceed as follows The wire which is coloured green and yellow must be connected to the terminal in the plug which is marked with the letter E or by the earth symbol or coloured green or green and yellow The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red NOTE If the supply cord is damaged it must be replaced by the special cord obtainable at authorized service parts centers A CAUTION Cleaning and maintenance must be carried out only by qualified service personal Before cleaning stop operation and switch off the power supply REGULAR INSPECTION
21. il V Q511 C512 ele ig pi 77 9 oO OV OV oV sss DC12V Line 7M oe ee ee DC5V Line 4 POWERON POWER OFF Micro computer Pin 69 5V The reset circuit is used to reset the program to its initial settings when the power is turned on or when the power is recovered after a power failure e The micro computer is reset when the reset input is and operation is possible when the reset input is Lo e The waveforms at each point when the power is turned on and off are shown in the diagrams e When the power is turned on the voltages of the DC 12V line and DC 5V lines are increased When the voltage of DC 12V lines reaches about 7V ZD511 is turned ON the potential of Q511 s base rises and Q511 is turned ON Since Q511 s collector is set to LO at this time Q512 is turned OFF and the reset input of the micro computer is set to Lo The DC 5V line voltage has already become 5V at this time and the micro computer starts operation e When the power is turned OFF the voltage of the DC 12V line decreases When it becomes about 7V ZD511 is turned OFF then Q511 is turned OFF Q512 is turned ON the reset input of the micro computer is set to and the micro computer is set to the reset mode 50 3 Buzzer Circuit Micro computer AX 3U Q302 i w N N m 2
22. PLEASE CHECK THE FOLLOWING POINTS BY QUALIFIED SERVICE PERSONAL EITHER EVERY HALF YEARLY OR YEARLY CONTACT YOUR SALES AGENT OR SERVICE SHOP 1 Is the earth line disconnected or broken Is the mounting frame seriously affected by rust and is the 2 outdoor unit tilted or unstable Is the plug of power line firmly plugged into the socket Please ensure no loose contact between them 27 AFTER SALE SERVICE AND WARRANTY WHEN ASKING FOR SERVICE CHECK THE FOLLOWING POINTS N CONDITION CHECK THE FOLLOWING POINTS e 5 the fuse all right 5 the voltage extremely high or low Wh E Is the circuit breaker e Was the air filter cleaned Does sunlight fall directly on the outdoor unit When it does not cool well e Is the air flow of the outdoor unit obstructed When it does not hot well e Are the doors or windows opened or is there any source of heat in the room e Is the set temperature suitable 2 d N Notes e In quiet operation or stopping the operation the following phenomena may occassionally occur but they are not abnormal for the operation 1 Slight flowing noise of refrigerant in the refrigerating cycle 2 Slight rubbing noise from the fan casing which is cooled and then gradually warmed as operation stops e The odor will possibly be emitted from the room air condit
23. Please keep this manual after reading PRECAUTIONS DURING INSTALLATION e Do not reconstruct the unit Water leakage fault short circuit or fire may occur if you reconstruct the unit by yourself A e Please ask your sales agent or qualified technician for the installation of your unit Water leakage short circuit or fire may occur if you install WARNING the unit by yourself e Please use earth line Do not place the earth line near water or gas pipes lightning conductor or the earth line of telephone Improper installation of earth line may cause electric shock e A circuit breaker should be installed depending on the mounting site of A the unit Without a circuit breaker the danger of electric shock exists e Do not install the unit near a location where there is flammable gas CAUTION The outdoor unit may catch fire if flammable gas leaks around it e Please ensure smooth flow of water when installing the drain hose Should abnormal situation arises like burning smell please stop operating the unit and turn off the circuit breaker Contact your agent Fault short circuit or fire may occur if you continue to operate the unit under abnormal situation e Please contact your agent for maintenance Improper self maintenance may cause electric shock and fire e Please contact your agent if you need to remove and reinstall the unit Electric shock or fire may occur if you remove and reinstall the un
24. When the buzzer is be activated buzzer output pin GO of the micro computer alternates between ON and OFF repeatedly at 4kHz and Q302 is turned ON OFF accordingly A 4kHz voltage is applied to the buzzer and the diaphragm of the buzzer vibrates to output 4kHz sound 4 Initial setting IC301 The pre heating operation start value ratings of the compressor maximum rotation speed etc are preset in the micro computer D301 D302 D303 Micro computer AX 3U 5 Receive circuit 12V ES cro Micro computer AX 3U WV d R622 27 REMOCON IP 5 R712 C710 Unit R621 N OV Infrared signals from the wireless remote controller are received by the light receiving unit and output after being amplified and shaped 51 6 Service Operation Circuit Micro computer 30 R606 FORCE COOL 42 V OV Cool Normal e Use the service switch to select Cooling temporarily when the interior electric equipment has troubled e Setting the switch to Cooling causes continuous cooling room temperature control To control the room temperature turn on and off the disconnect switch To protect the compressor wait at least 3 minutes before turning on again e The fan speed is e Doe
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27. D START STOP button next time 12 DEHUMIDIFYING OPERATION 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 HITACHI Press the FUNCTION selector so that the display indicates 1 DEHUMIDIFY The FAN SPEED is set at LOW automatically The FAN SPEED button does not work Set the desired room temperature with the TEMPERATURE button the display indicates the setting w Lt lac The range of 20 26 C is recommended as the room temperature for dehumidifying 4 Press the START STOP button Dehumidifying operation starts with a beep Press the button again to stop operation 7 As the settings are stored in memory the remote controller you only have to press the START STOP button next time HITACHI Dehumidifying Function When the room temperature is higher than the temperature setting The device will dehumidify the room reducing the room temperature to the preset level When the room temperature is lower than the temperature setting Dehumidifying will be performed at the temperature setting slightly lower than the current room temperature regardless of the temperature setting The function will stop the indoor unit will stop emitting air as soon as the room temperature becomes lower than the setting temperature
28. RAC 09GH4 0000 RAS 14GH4 RAC 14GH4 Printed in Malaysia
29. TERMINAL BOARD 65 MODEL RAS 14GH4 PART NO RAS 14GH4 Q TY UNIT PARTS NAME HWRAS 25YH4 CABINET HWRAS 25YH4 MOUNTING PLATE PMRAS 07GH4 FAN MOTOR HWRAS 25YH4 TANGENTIAL FAN HWRAS 25YH4 P BEARING ASSY HWRAS 25YH4 FAN MOTOR BASE PMRAS 07GH4 CYCLE ASSY HWRAS 25YH4 BEARING COVER HWRAS 25YH4 HWRAS 25YH4 PIPE SUPPORT DRAIN PAN ASSY HWRAS 25YH4 AUTO SWEEP MOTOR HWRAS 25YH4 HWRAS 25YH4 FRONT COVER ASSY FRONT PANEL HWRAS 25YH4 AIR FILTER R HWRAS 25YH4 5 51 1 AIR FILTER 1 REMOTE CONTROL ASSEMBLY PMRAS 10C3M REMOTE CONTROL SUPPORT PMRAS 10C8M THERMISTOR SUPPORT PMRAS 07CH2 THERMISTOR HWRAS 25YH4 POWER SWITCH PMRAS 14GH4 PMRAS 07GH4 P W B MAIN P W B POWER SW SUPPLY HWRAS 25YH4 TERMINAL BOARD FUSE HWRAS 25YH4 HWRAS 25YH4 LOW COVER TERMINAL BOARD 2P 66 PARTS LIST AND DIAGRAM INDOOR UNIT MODEL RAC 07GH4 RAC 09GH4 N 67 MODEL RAC 07GH4 PART NO RAC 07GH4 Q TY UNIT PARTS NAME PMRAC 07GH4 STRAINER CAPILLARY PMRAC 07GH4 PMRAC 05CV STRAINER CONDENSOR FAN MOTOR SUPPORT PMRAC 10C8 FAN MOTOR PMRAC 25CNH2 PROPELLER FAN PMRAC 07CH2 CABINET PMRAC 05CV SI
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31. operation mode together with your wake up time in the morning This will enable you to enjoy a comfortable room temperature Please use the timer effectively Please Adjust Suitable Temperature For Baby And Children Please pay attention to the room temperature and air flow direction when operating the unit for baby children and old folks who have difficulty in movement 22 _ FOR USER S INFORMATION The Air Conditioner And The Heat Source In The Room A 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 cannot be achieved 2 27 Not Operating For A Long Time When the indoor unit is not to be 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 When Lightning Occurs Warning To protect the whole unit during lightning please stop operating the unit and remove the plug from the socket ss Interference From Electrical Products P 255 lt gt lt Inverter type A Caution To avoid noise interference please place the indoor unit and its remote controller at least 1m away from el
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33. IC 401 Data read wrongly IC401 data is not in order case that data read from 401 DH Hb 13 times is wrong Heat exchanger thermistor 1 Thermistor error er 5 14 times Heat exchanger thermistor open 2 Indoor control circuit board or short circuit detected Room thermistor error 1 Thermistor Room thermistor error open or 2 6 HI 11 2 15 times short circuit detected 2 Indoor control circuit board d 0 5 second on 0 5 second off A CAUTION Remote control is disabled while the Timer lamp is flashing To check operation turn off the power switch and turn it on again 62 PARTS LIST AND DIAGRAM INDOOR UNIT 14GH4 MODEL RAS 07GH4 RAS 09GH4 RAS 63 MODEL RAS 07GH4 PART NO RAS 07GH4 Q TY UNIT PARTS NAME HWRAS 25YH4 CABINET HWRAS 25YH4 MOUNTING PLATE PMRAS 07GH4 FAN MOTOR HWRAS 25YH4 TANGENTIAL FAN HWRAS 25YH4 P BEARING ASSY HWRAS 25YH4 FAN MOTOR BASE PMRAS 07GH4 CYCLE ASSY HWRAS 25YH4 BEARING COVER HWRAS 25YH4 HWRAS 25YH4 PIPE SUPPORT DRAIN PAN ASSY HWRAS 25YH4 AUTO SWEEP MOTOR HWRAS 25YH4 HWRAS 25YH4 FRONT COVER ASSY FRONT PANEL HWRAS 25YH4 AIR FILTER R HWRAS 25YH4 PMRAS 51CHA1 AIR FILTER L REMOTE CONTROL ASSEMBLY PMRAS 10C3M REMOTE CONTROL SUPPORT PMRAS 10C8M THERMIST
34. application requirements Open the front panel and remove the filter e Gently lift and remove the air cleansing and deodorizing filter from the air filter frame Vacuum dust from the air filter and air cleansing and deodorizing filter using vacuum cleaner If there is too much dust rinse under running tap water and gently brush it with soft bristle brush Allow filters to dry in shade e Re insert the air cleansing and deodorizing filter to the filter frame Set the filter with FRONT mark facing front and slot them into the original state e After attaching the filters push the front panel at three arrow portions as shown in figure and close it 2 A CAUTION e Do not wash with hot water at more than 40 C The filter may shrink e When washing it shake off moisture completely and dry it in the shade do not expose it directly to the sun The filter may shrink e Do not use detergent on the air cleansing and deodorizing filter as some detergent may deteriorate the filter electrostatic performance 25 2 Washable Front Panel e Remove the front panel and wash with clean water Wash it with a soft sponge After using neutral detergent wash thoroughly with clean water e When front panel is
35. as to be quiet and good for people s health You can set the sleep timer to turn off after 1 2 3 or 7 hours The FAN SPEED and room temperature will be controlled as shown below Operation with the sleep timer last setting e Sleep timer effective only once Function Operation The room temperature will be 5 C controlled 5 C below the g Heating temperature and the FAN SPEED will be set to LOW Q s Q 6 setting 60 minutes after the Z 7 hours setting of the sleep timer A Nour later 60 minutes later later 1 hour later 3 hours later The room temperature will be 2 C Cooling controlled 2 C above the 3 temperature and the FAN SPEED will be set to LOW 27 setting 60 minutes after the Sleep geh amp setting of the sleep timer timer set 2 hours 7 hours later dehumidifying later 60 minutes later 3 hours later Fan 1 The settings of room temperature and circulation are varied e f date or current time is not set sleep timer can not be set e you set the sleep timer after the off on off or off on timer has been set the sleep timer becomes effective instead of the off on off or off on timer set earlier You can not set other timer during sleep timer operation e After sleep timer time is up and when press sleep button again the sleep timer will be set as
36. handling 1 Use a conductive container for carrying and storing of parts Even rejected goods should be handled in the same way A conductive polyvinyl bag IC Conductive sponge Fig 1 Conductive Container 2 When any part is handled uncovered in counting packing and the like the handling person must always use himself as a body earth Make yourself a body earth by passing one M ohm earth resistance through a ring or bracelet 3 Be careful not to touch the parts with your clothing when you hold a part even if a body earth is being taken 4 Be sure to place a part on a metal plate with grounding 5 Be careful not to fail to turn off power when you repair the printed circuit board At the same time try to repair the printed circuit board on a grounded metal plate Body earth Elimik conductive band S Clip for connection with a 1MQ grounding wire Fig 2 Body Earth 6 Use a three wire type soldering iron including a grounding wire Metal plate of aluminium stainless steel etc Working table Resistor of 1 MQ 1 2W Staple J Earth wire Bare copper wire for body earth Fig 3 Grounding of the working table Soldering iron Grounding wire Screw stop at the screwed part using a rag plate Fig 4 Grounding a soldering iron Use high insulation mode 100V 10 or higher when ordinary iron is to be used 7 In checking circuits
37. jo eun ul pejunoo seinuiu 09 NO uouws doisuejs jo eum eui 430 S sowe USuM NO YOUMS dois juejs jeje NO pejunoo uoniqiuod jo og eui einjejeduie pue wys 9991 einjejeduiej jes eui eui euin eaueape pue eq d ls Duunp 5 eou q ueuw 10 pide s uoneolpui eur sayy 0L NO pue 440 0 193 YOUMS SI ey 001 40 ue jo uoneiedo jeye 1461 uBIS Bu 1osueS uon eoyipiuinuep 1osu s 10 saydde osje ewes y 0 10 sejdde ewes eubis eu Duipioooe eq pue einyeiedwie woos Jes eq jou Il NO SI ueum si o uonej do 10SU8S
38. not removed wipe it with a soft dry cloth Wipe the remote controller thoroughly with a soft dry cloth e Wipe the water thoroughly If water remains at indicators or signal receiver of indoor unit it causes trouble Method of removing the front panel Be sure to hold the front panel with both hands to detach and attach it Removing the Front Panel Flange l Wik AS Projection e When the front panel is fully opened with e Move the projections of the left and right both hands push the right arm to the inside arms into the Flanges in the unit and to release it and while closing the front panel securely insert them into the holes slightly put it out forward 2 A CAUTION e 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 3 MAINTENANCE AT BEGINNING OF LONG OFF PERIOD 2 e Run the unit by setting the operation mode to y FAN and the fan speed to HI for about half a day d a fine day and dry the whole of the unit o x e Switch off the power plug Blow V MEE
39. the automatic operation mode determined At automatic operation changing the fan speed change switch does not vary the fan speed The room temperature cannot be controlled at an automatic operation According to the room temperature cooling or dehumidifying operation is automatically selected Cooling When room temperature is approx 27 C or higher Dehumidifying When room temperature is between approx 23 C and 27 C Heating When room temperature is approx 23 C or lower The fan speed is automati cally determined It is automatically set as follows 14 At cooling Set at 27 C At dehumidifying Set slightly lower than room temperature The room temperature setting can be raised 3 C by A or lowered 3 C by V 56 When changing the room temperature setting in an automatic operation the next automatic operation mode is determined by new room temperature setting If for example the room temperature setting is 2 C lowered for example the operation mode is as follows When room temperature is approx 25 C or higher Cooling Dehumidifying When room temperature is between approx 21 C and 25 C Heating When room temperature is approx 21 C or lower Common etc There is difference between the roo
40. 2 90 3 50 7 160 9 900 11 940 TOTAL INPUT 490 510 530 740 770 810 960 1000 1050 HEATING TOTAL AMPERES 2 30 2 30 2 30 3 50 3 50 3 50 4 60 4 60 4 60 2 20 3 00 3 85 7 500 10 230 13 140 TYPE COOLING CAPACITY CAPACITY DIMENSIONS mm NET WEIGHT After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT DECEMBER 2003 Refrigeration amp Air Conditioning Division 10 Any inflammable thing should never 11 SAFETY DURING REPAIR WORK In order to disassemble and repair the unit in question be sure to disconnect the power cord plug from the power outlet before starting the work If it is necessary to replace any parts they should be replaced with respective genuine parts for the unit and the replacement must be effected in correct manner according to the instructions in the Service Manual of the unit If the contacts of electrical parts are defective replace the electrical parts without trying to repair them After completion of repairs the initial state should be restored Lead wires should be connected and laid as in the initial state Modification of the unit by user himself should absolutely be prohibited Tools and measuring instruments for use in repairs or inspection should be accurately calibra
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44. AB Line 1 6mm dia x 2 CD Line is used for the connection Indoor Unit Outdoor Unit L T N Connecting RED tne T BAN 2 cord WHT B BLK A 259 MODEL RAC 07GH4 RAC 09GH4 700 53 236 482 428 210 10 gt Sir AN e Lo i 1 gt 5 Air outlet Air inlet 157 Handle lt gt 55 P 16 12 35 500 Viewed from MODEL RAC 14GH4 le 852 gt 28 750 76 16 gt 280 pl 26 56 165 gt 1 7 X one S 4 298 9 L TNU 2 ZI or Y gt 195 2 b ojo SIS y Log 30 MAIN PARTS COMPONENT THERMOSTAT Room Temperature Thermistor Thermostat Specifications M
45. DE PLATE R PMRAC 05CV SIDE PLATE L PMRAC 05CV HANDLE 09 1 D GRILL PMRAC 07GH4 COMPRESSOR PMRA 08GF COMPRESSOR RUBBER PMRA 08GF COMPRESSOR NUT PMRAC 07GH4 CONDENSER PMRAC 07GH4 2S VALVE PMRAC 07GH4 3S VALVE PMRAC 10C8 FAN MOTOR CAPACITOR PMRAC 51CHA1 TERMINAL BOARD 4P PMRAC 07GH4 COMPRESSOR CAPACITOR PMRAC 07GH4 REVERSING VALVE PMRAC 07CH2 COIL REVERSING VALVE PMRAC 07GH4 OVERLOAD PROTECTOR 68 MODEL z RAC 09GH4 PART NO RAC 09GH4 Q TY UNIT PARTS NAME PMRAC 09GH4 CHECKVALVE PMRAC 07GH4 STRAINER CAPILLARY PMRAC 09GH4 STRAINER CONDENSOR PMRAC 05CV FAN MOTOR SUPPORT 10 7 FAN MOTOR PMRAC 25CNH2 PROPELLER FAN PMRAC 09GH4 CABINET PMRAC 05CV SIDE PLATE R CO N O 01 COco N PMRAC 05CV SIDE PLATE L PMRAC 05CV HANDLE k 09 1 D GRILL Co PMRAC 09GH4 COMPRESSOR A PMRA 08GF COMPRESSOR RUBBER PMRA 08GF COMPRESSOR NUT PMRAC 09GH4 CONDENSER i N PMRAC 07GH4 2S VALVE PMRAC 07GH4 3S VALVE 10 7 FAN MOTOR CAPACITOR PMRAS 51CHA1 TERMINAL BOARD 4
46. HITACHI Inspire the Next RAS 07GH4 RAC 07GH4 RAS 09GH4 RAC 09GH4 SERVICE MANUAL RAS 14GH4 RAC 14GH4 TECHNICAL INFORMATION REFER TO THE FOUNDATION MANUAL FOR SERVICE PERSONNEL ONLY CONTENTS SPECIFICATIONS Y 5 HOW TO 6 CONSTRUCTION AND DIMENSIONAL DIAGRAM 29 MAIN PARTS COMPONENT T 31 RAS 07GH4 WIRING DIAGRAM eerie 33 RAS 09GH4 CIRCUIT DIAGRAM 35 RAS 14GH4 PRINTED WIRING BOARD LOCATION DIAGRAM 37 BLOCK DIAGRAM 39 BASIC MODE eet eee 41 REFRIGERATING CYCLE DIAGRAM 47 EE DESCRIPTION OF MAIN CIRCUIT OPERATION 49 ESSE AUTO SWING FUNCTION 53 SERVICE CALO E 54 PARTS LIST AND DIAGRAM 63 SPECIFICATIONS WALL TYPE INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT MODEL RAS 07GH4 RAC 07GH4 RAS 09GH4 RAC 09GH4 RAS 14GH4 RAC 14GH4 POWER SOURCE 1 PHASE 50 Hz 220 230 240 1 PHASE 50 Hz 220 230 240V 1 PHASE 50 Hz 220 230 240V TOTAL INPUT 590 610 630 890 900 950 1060 1090 1120 TOTAL AMPERES 2 80 2 80 2 80 4 20 4 10 4 10 5 00 5 00 4 90 2 10
47. ODEL RAS 07GH4 09GH4 14GH4 THERMOSTAT MODEL OPERATION HEAT TEMPERATURE C F FAN MOTOR INDICATION 61 9 18 7 65 6 16 16 0 60 8 19 3 66 7 INDICATION 24 6 76 3 26 7 80 1 24 27 3 INDICATION 32 6 90 7 34 2 94 5 32 Fan Motor Specifications MODEL RAS 07GH4 09GH4 14GH4 61 9 60 8 76 3 24 0 75 2 90 7 89 6 32 0 89 6 35 3 65 6 66 7 80 1 81 1 94 5 95 5 95 5 RAC 07GH4 09GH4 14GH4 PHASE SINGLE RATED VOLTAGE 220 240V RATED FREQUENCY 50 Hz OUTPUT 20W 30W 30W POLE NUMBER 6 CONNECTION YELLOW BLACK INTERNAL THERMAL FUSE RESISTANCE VALUE 0 RA 252 6 RM 253 0 RA 173 4 RM 250 3 RA 171 1 223115 RM 431 9 RA 307 1 RM 307 7 RA 210 9 RM 304 4 RA 208 1 COMPRESSOR MOTOR Compressor Motor Specifications MODEL RAC 07GH4 09GH4 14GH4 COMPRESSOR MODEL 5RS080 5PS112 5PS132 PHASE SINGLE RATED VOLTAGE 220 240 V RATED FREQUENCY 50 Hz LOCKED ROTOR CURRENT 45 A POLE NUMBER 2 ORANGE CONNECTION 20 C RESISTANCE VALUE 68 F Q 75 C 167 F EXTERNAL OVERLOAD RELAY INTERNAL PROTECTOR MORR ORANGE RAC 07GH4 RAC 09GH4 RAC 14GH4 A CAUTION When the Air Conditioner has been op
48. OR SUPPORT PMRAS 07CH2 THERMISTOR HWRAS 25YH4 POWER SWITCH PMRAS 07GH4 PMRAS 07GH4 P W B MAIN P W B POWER SW SUPPLY HWRAS 25YH4 TERMINAL BOARD THERM FUSE HWRAS 25YH4 HWRAS 25YH4 LOW COVER TERMINAL BOARD 64 MODEL RAS 09GH4 z PART NO RAS 09GH4 Q TY UNIT PARTS NAME k HWRAS 25YH4 CABINET HWRAS 25YH4 MOUNTING PLATE PMRAS 07GH4 FAN MOTOR HWRAS 25YH4 TANGENTIAL FAN HWRAS 25YH4 P BEARING ASSY HWRAS 25YH4 FAN MOTOR BASE PMRAS 07GH4 CYCLE ASSY HWRAS 25YH4 BEARING COVER HWRAS 25YH4 PIPE SUPPORT OQ HWRAS 25YH4 DRAIN PAN ASSY i HWRAS 25YH4 AUTO SWEEP MOTOR k Co HWRAS 25YH4 FRONT COVER ASSY 5 25 4 FRONT PANEL HWRAS 25YH4 AIR FILTER R HWRAS 25YH4 AIR FILTER L i N PMRAS 51CHA1 REMOTE CONTROL ASSEMBLY i PMRAS 10C3M REMOTE CONTROL SUPPORT co PMRAS 10C8M THERMISTOR SUPPORT PMRAS 07CH2 THERMISTOR HWRAS 25YH4 POWER SWITCH PMRAS 09GH4 P W B MAIN PMRAS 07GH4 P W B POWER SW SUPPLY HWRAS 25YH4 TERMINAL BOARD FUSE HWRAS 25YH4 LOW COVER 1 5 25 4
49. P PMRAC 09GH4 COMPRESSOR CAPACITOR PMRAC 07GH4 REVERSING VALVE PMRAC 07CH2 COIL REVERSING VALVE PMRAC 09GH4 OVERLOAD PROTECTOR 69 PARTS LIST AND DIAGRAM OUTDOOR UNIT MODEL RAC 14GH4 EN SX 70 MODEL z RAC 14GH4 PART NO RAC 14GH4 Q TY UNIT PARTS NAME KPNT1 PUSH NUT PMRAC 14GH4 COMPRESSOR RAC 2226HV COMPRESSOR RUBBER PMRAC 25NH4 VALVE 25 PMRAC 25NH4 VALVE 88 PMRAC 25NH4 CONDENSOR 51 1 FAN MOTOR SUPPORT 18 7 FAN MOTOR PMRAC 25CNH2 PROPELLER FAN O OQ PMRAC 51CHA1 TERMINAL BOARD 4P PMRAC 09GH4 COMPRESSOR CAPACITOR 10 7 FAN MOTOR CAPACITOR Co PMRAC 14GH4 HANDLE A PMRAC 51CA1 CABINET 09 1 D GRILL PMRAC 14GH4 SIDE PLATE R 51 1 PMRAC 07GH4 REVERSING VALVE PMRAC 14GH4 STRAINER CAPILLARY Co PMRAC 14GH4 STRAINER CONDENSOR PMRAC 09GH4 CHECKVALVE Co PMRAC 14GH4 OVERLOAD PROTECTOR HITACHI RAS 07GH4 RAC 07GH4 RAS 09GH4
50. RATION e Use the device for heating when the outdoor temperature is under 21 C When it is too warm over 24 C the heating function may not work in order to protect the device e order to keep reliability of the device please use this device above 10 C of the outdoor temperature HITACHI Press the FUNCTION selector so that the display indicates HEAT Set the desired FAN SPEED with the FAN SPEED button the display indicates the setting AUTO The fan speed is at first and varies to MED 4 automatically when the preset temperature has 2 been reached HI Economical as the room will become warm quickly But you may feel a chill at the beginning MED Quiet LOW More quiet Set the desired room temperature with the TEMPERATURE buttons the display indicates the setting 3 The range of 18 22 C is recommended as the room temperature for heating If the temperature setting is 20 C the room temperature will be controlled at around 20 C HITACHI t C The temperature setting and the actual room temperature may vary somewhat depending on conditions START Press the START STOP button Heating operation starts STOP with a beep Press the button again to stop operation As the settings are stored in memory in the remote controller you only have to press the
51. ccurs and the TIMER lamp lights on the indoor unit gt Example The device will automatically turn on earlier so that the preset temperature can be reached at 7 00 a m The setting of the turn on time is now complete oe 4 set the turn on time with the 5 Point the signal window of the remote controller toward the indoor unit and TIMER control button press the RESERVE button The ON mark starts lighting instead of flashing and the RESERVED sign lights A beep occurs and the G TIMER lamp lights on the indoor unit PM nan ly PM 11 44 Example p E I The device will turn off at 10 30 p m and then automatically v NIZ gt 6 turn on earlier so that the preset temperature can be reached at 7 00 a m rm n AM The settings of the turn on off times are now complete P e The timer may be used in three ways off timer on timer and ON OFF OFF ON timer Set the current time at first because it serves as a reference e As the time settings are stored in memory in the remote controller you only have to press the RESERVE button in order to use the same settings next time 7 HOW TO SET THE SLEEP 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
52. ectrical products To prevent interference place at least 1m away fluorescent lamp TV 23 ATTACHING THE AIR CLEANSING AND DEODORIZING FILTERS A CAUTION Cleaning and maintenance must be carried out only by qualified service personal Before cleaning stop operation and switch off the power supply 1 Open the front panel e Pull up the front panel by holding it at both sides with both hands 2 Remove the filter e 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 deodorizing filters to the frame by gently compress its both sides Bs N and release after insertion into filter frame A CAUTION Do not bend the air cleansing and deodorizing filter as it may cause damage to the structure 4 Attach the filters e Attach the filters by ensuring that the surface written FRONT is facing front e After attaching the filters push the front panel at three arrow portion as shown in figure and close it NOTE In case of removing the air cleansing and deodorizing fi
53. erated for a long time with the capillary tubes clogged or crushed or with too little coolant check the color of the refrigerant oil inside the compressor If the color has been changed conspicuously replace the compressor 32 2 HOLSINHUSL HOLOWN 2 91144318 p 310N38SS3THWI 610 lg gm Im NH WI M 9 33 13933 0 SAK lL j S3NIT woronnyg 6 agg 1 8004 5 3 8 821 Feri s 3unive3di3L anig LO SN __ 208 quyog WNINHAL HOLONNWS 122 Pet 151 2 0809 acm 1 N3389 HOLON Nv 5 1 9NIO3NNOD g HlHV3 2 11 12 iau seen ____ I Quv08 t So d p 1 8000100 3endvel e i ith Sa ATI TINTA ONISUSAGU 2 H3MOd 039 sua PAN 7 76 woulovav NE ro TR mp 318 N ME 80553840402 INVHOVIG NMOS 2122271 39NVHO NS 8 HOLIMS 0809 9 238802 NO 18 SNIdIAA
54. for maintenance inspection or some others be careful not to have the test probes of the measuring instrument shortcircuit a load circuit or the like A CAUTION 1 In quiet or stopping operation slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally but this noise is not abnormal for the operation 2 When it thunders near by it is recommended to stop the operation and to disconnect the power cord plug from the power outlet for safety 3 n the event of power failure the airconditioner will restart automatically in the previously selected mode once the power is restored In the event of power failure during TIMER operation the timer will be reset and the unit will begin or stop operating under a new timer setting 4 the room air conditioner is stopped by adjusting thermostat or missoperation and re start in a moment there is occasion that the cooling and heating operation does not start for 3 minutes it is not abnormal and this is the result of the operation of IC delay circuit This IC delay circuit ensures that there is no danger of blowing fuse or damaging parts even if operation is restarted accidentally 5 This room air conditioner should not be used at the cooling operation when the outside temperature is below 10 C 50 F 6 This room air conditioner the reverse cycle should not be used when the outside temperature is below 10 14 F If the reverse cycle is used unde
55. ill not change when the room temperature HITACHI Press the FUNCTION selector 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 COOL or DEHUMIDIFY depending on the initial room temperature Press the D START STOP button Operation starts with a beep Press the button again to stop operation lt As the settings are stored in memory in the remote controller you only have to press the 1 START STOP button next time You can raise or lower the temperature setting as necessary by maximum of Press the temperature button and the temperature setting will change by 1 C each time The preset temperature and the actual room temperature may vary somewhat depending on conditions The display does not indicate the preset temperature in the AUTO mode If you change the setting the indoor unit will produce a beep 2 Condition of Automatic Operation Initial room temperature Function Temperature setting FAN SPEED HI at start MED or LOW Over 27 C p COOL 27 C after the preset temperature is reached Slightly lower than the eee room temperature HI at start MED or LOW Under 23 C 23 C after the preset temperature is reached e HEATING OPE
56. ing thermistor in the indoor unit detects the room temperature and according to the particular temperature automatically performs Cooling or Dehumidifying operation The value indicated not at an Automatic but manual operation is not the actual room temperature but the room temperature setting The current time disappears soon and the timer settting takes a indication precedence 58 When setting the current time its indication blinks for approximately 3 minutes In spite of timer Preprogram Isn t the time over the pre the time setting is programmed time extinguished As soon as the prepro grammed time is reached the time setting disappears Q24 ie selecting aN A25 At a Dehumidifying Dehumidifying operation operation the LO fan speed mode the fan speed mode is forcibly selected remains LO fan speed A 59 TROUBLE SHOOTING No cooling or heating No operation at all Operates by setting the service 1 1 Before using the service switch disengage and engage the plug Do not operate the remote controller switch to forced cooling 4 Check the following parts and replace if faulty YES NO 1 Current fuse Remove and check the continuity across 2 Varistor Check whether the appearance is blackish or not 3 Power s
57. inimum pipe length 5m 25 above 200mm T et 50mm when 4 installed on the above 100mm give clearance as wide as possible ceiling of balcony 22 above 100mm LE WJ Z NIIT 0 UL 21 above 300mm above 200mm above 100mm il above 100mm 2 300mm or more The indoor piping should be insulated with the enclosed insulation pipe If the insulator is insufficient please use commersial products e The difference in height between the indoor and outdoor unit should be kept max 5m The connecting pipe no matter big or small should all be insulated with insulation pipe and then wrapped with vinyl tape The insulator will deteriorate if it is not wrapped with tape The connection of insulated drain hose inner diameter g 16mm Please use insulated drain hose for the indoor piping commercial product MODEL RAS 14GH4 RAC 14GH4 Figure showing the installation of Indoor anf Outdoor unit A The installation height of indoor unit must be 2 3m or more in a non public area CAUTION 5 8 E H 21 311 w 2 EE l s B o o 5 68 S 5 Ele 3 gt 7 amp 12 gt gt w w 4 above 200mm above 50mm when 5 instal
58. ioner because the various odor emitted by smoke foodstuffs cosmetics and so on sticks to it So the air filter and the evaporator regularly must be cleaned to reduce the odor 2 e 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 number date of installation Please also inform him regarding the fault e Power supply shall be connected at the rated voltage otherwise the unit will be broken or could not reach the specified capacity Please note On switching on the equipment particularly when the room light is dimmed a slight brightness fluctuation may occur This is of no consequence The conditions of the local Power Supply Companies are to be observed Note e Avoid to use the room air conditioner for cooling operation when the outside temperature is below 21 70 F The recommended maximum and minimum operating temperatures of the hot and cold sides should be as below Cooling Heating Minimum Maximum Minimum Maximum Dry bulb C 21 32 20 27 Indoor Wet bulb C 15 23 12 19 Dry bulb C 21 43 2 21 Wet bulb 15 26 1 15 28 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAS 07GH4 09GH4 14GH4 210 Top air 780 suction grill Mo
59. it yourself improperly PRECAUTIONS DURING OPERATION e Avoid an extended period of direct air flow for your health e Do not insert a finger a rod or other objects into the air outlet or inlet As the fan is rotating at a high speed it will cause injury Before cleaning be sure to stop the operation and turn the breaker OFF e Do not use any conductor as fuse wire this could cause fatal accident oz z gt gt z F e During thunder storm disconnect and turn off the circuit breaker PRECAUTIONS DURING OPERATION e The product shall be operated under the manufacturer specification and not for any other intended use e Do not attempt to operate the unit with wet hands this could cause fatal accident 303 e When operating the unit with burning equipments regularly ventilate the e W NS room to avoid oxygen insufficiency 27 Do not direct the coming out from the air conditioner panel to face household heating apparatus as this may affect the working of apparatus such as the electric kettle oven etc e Please ensure that outdoor mounting frame is always stable firm and without defect If not the outdoor unit may collapse and cause danger Do not splash or direct water to the body of the unit when cleaning it as this may cause short circuit e Do not use any aerosol or hair sprays near the indoor unit This chemical can adhere on hea
60. ixture provided Before fixing it make sure the indoor unit can be controlled from the remote controller Handle the remote controller with care Dropping it or getting it wet may compromise its signal transmission capability After new batteries are inserted into the remote controller the unit will initially require approximately 10 seconds to respond to commands and operate HITACHI AUTO HEAT DEHUMIDIFY Signal emitting window transmission sign Point this window toward the indoor unit when controlling it The transmission sign blinks when a signal is sent Display This indicates the room temperature selected current time timer status function and intensity of circulation selected START STOP button Press this button to start operation Press it again to stop operation SLEEP button Use this button to set the sleep timer TEMPERATURE buttons Use these buttons to raise or lower the temperature setting Keep pressed and the value will change more quickly TIME button Use this button to set and check the time and date RESET buttons FUNCTION selector Use this button to select the operating mode Every time you press it the mode will change from 7 AUTO to HEAT to DEHUMIDIFY to COOL and to 4 FAN cyclically FAN SPEED selector This determines the fan speed Every time you press this button the intensity of circulation will change from AUTO t
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62. led on the ceiling of balcony 5 100 give clearance as wide as possible above 100mm above 700mm Y 50 The indoor piping should be insulated with the enclosed insulation pipe If the insulator is insufficient please use commersial products e The difference in height between the indoor and outdoor unit should be kept max 5m The connecting pipe no matter big or small should all be insulated with insulation pipe and then wrapped with vinyl tape The insulator will deteriorate if it is not wrapped with tape The connection of insulated drain hose inner diameter 16mm Please use insulated drain hose for the indoor piping commercial product gt SAFETY PRECAUTION 17 Please read the Safety Precaution carefully before operating the unit to ensure correct usage of the unit Pay special attention to signs of A Warning and Caution The Warning section contains matters which if not observed strictly may cause death or serious injury The Caution section contains matters which may result in serious consequences if not observed properly Please observe all instructions strictly to ensure safety The sign indicate the following meanings e Make sure to connect earth line The sign in the figure indicates prohibition Indicates the instructions that must be followed
63. lters please follow the above procedures The cooling capacity is slightly weakened and the cooling speed becomes slower when the air cleansing and deodorizing filters are used So set the fan speed to HIGH when using it in this condition e Air cleansing and deodorizing filters are washable and reusable up to 20 times by using vacuum cleaner or water rinse under running tap water Type number for this air cleansing filter is lt SPX CFH11 gt Please use this number for ordering when you want to renew it Do not operate the air conditioner without filter Dust may enter the air conditioner and fault may occur 24 MAINTENANCE A CAUTION 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 ES 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 Further noise may occur Be sure to clean the filter following the procedure below PROCEDURE 1 2 3 Air cleansing and deodorizing filter should be cleaned every month or sooner if noticeable loading occurs When used overtime it may loose its deodorizing function For maximum performance it is recommended to replace it every 3 6 months depending on
64. m temperature setting and actual room temperature There may be a difference between the room temperature setting and actual room temperature on account of the room structure air flow etc there is a difference from the room temperature adjust the set temperature to keep living space at a comfortable temperature A15 2 016 What will happen if the time A timer operation is setting is changed while in a performed until the time after timer operation changing the time setting A In the Automatic fan speed It is not trouble The Set the temporary switch mode the indoor fan wind preventive function normal changes to MED and LO fan operates speed Nice temperature reservation Q18 In case of ON timer the operation does not The Nice temperature reservation functions start at a preprogrammed time but a little The operation starts earlier so the room earlier temperature will be as set at a programmed time The operation starts at most 60 minutes before a preprogrammed time The time to start an operation is irregular The Nice temperature reservation operates while preprogramming at the same time The starting time depends on the room load e 57 Wireless remote controller When the room temperature setting is 16
65. ng down and moving automatically for a long period of time water will condensed on the air deflector and drips down occasionally This will wet your furniture 20 HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER old batteries 1 Remove the cover as shown in the figure and take out D Pushana direction of arrow v 2 Install the new batteries N The direction of the batteries should match the marks in the A CAUTION 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 21 THE IDEAL WAYS OF OPERATION Suitable Room Temperature A Warning Freezing temperature is bad for health and a waste of electric power 87 Ventilation A Caution Do not close the room for a long period of time Occasionally open the door and windows to allow the 7 4 entrance of fresh air we Do Not Forget To Clean The Air Filter Dusty air filter will reduce the air volume and the cooling efficiency To prevent from wasting electric energy please clean the filter every 2 weeks Install curtain or blinds It is possible to reduce heat entering the room through windows A Effective Usage Of Timer At night please use the OFF or ON timer
66. nge the MONTH batteries current time day month OFF TIMER a 1 Set the current month and day with the TIMER control button C RESERVE CANCEL at the present time You can set the device to turn off 1 Press the OFF TIMER button OFF mark blinks on the display gt 2 00 P am 0 e The device will turn on at the designated times 1 Press the 2 button the mark blinks on the display gt ON OFF Timer 1 Press the ON OFF button so that the OFF mark blinks The device will turn on off and off on at the designated times The switching occurs first at the bp preset time that comes earlier Nl The arrow mark appearing on the Q 1 display indicates the sequence of switching operations 2 Set the turn off time with the TIMER control button Press the RESERVE button 3 Press the ON TIMER button so that the CO OFF mark lights and the ON mark blinks me A PM I I 27 LI NI AX 9 AM How to Cancel Reservation button Point the signal window of the remote controller toward the indoor unit and press the CANCEL The RESERVED sign goes out with a beep and the TIMER lamp turns off on the indoor uni
67. o B HI to MED to LOW during the FAN mode from HI to MED to S LOW AUTO SWING button Controls the angle of the horizontal air deflector TIMER control Use this button 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 COOL FAN Mj FAN SPEED I LOW MED HI SLEEPING STOP CANCEL START RESERVE START STOP TIME TIMER SET 2 T TIMER SELECTOR I ON TIMER OFF TIMER x AUTO SWING Precautions for Use Do not put the remote controller in the following places Under direct sunlight In the vicinity of a heater Handle the remote controller carefully Do not drop it on the floor and protect it from water Once the outdoor unit stops it will not restart for about 3 minutes unless you turn the power switch off and on or unplug the power cord and plug it in again This is to protect the device and does not indicate a failure If you press the FUNCTION selector button during operation the device may stop for about 3 minutes for protection 10 25 AUTOMATIC OPERATION varies The device will automatically determine the mode of operation HEAT COOL or DEHUMIDIFY depending on the initial room temperature The selected mode of operation w
68. orary Switch A Non conductor Stick FILTER LAMP When the device is operated for a total of about 100 hours the FILTER lamp lights to indicate that it is time to clean the filter The lamp goes out when the POWER SWITCH set to OFF and ON again OPERATION LAMP This lamp lights during operation The OPERATION LAMP flashes in the following cases during heating 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 2 TEMPORARY SWITCH 000000 000000 TEMPORARY SWITCH Use this switch to start and stop when the remote controller does not work Use non conductor stick example toothpick e By pressing the temporary switch the operation is done in previously set operation mode e When the operation is done using the temporary switch after the power source is turned off and turn on again the operation is done in automatic mode 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 indoor lighting is controlled electronically the range of control may be shorter This unit can be fixed on a wall using the f
69. r this condition the outside heat exchanger is frosted and efficiency falls 7 When the outside heat exchanger is frosted the frost is melted by operating the hot gas system it is not trouble that at this time fan stops and the vapour may rise from the outside heat exchanger SPECIFICATIONS MODEL RAS 07GH4 RAS 09GH4 RAS 14GH4 RAC 07GH4 RAC 09GH4 RAC 14GH4 FAN MOTOR 20 W 20 W 30 W FAN MOTOR CAPACITOR NO 1 5uF 450 VAC 2 5uF 450VAC FAN MOTOR PROTECTOR NO NO COMPRESSOR 5RS080 5RS112 5RS132 COMPRESSOR MOTOR CAPACITOR 20uF 450 VAC 25uF 450 VAC OVERLOAD PROTECTOR YES OVERHEAT PROTECTOR NO FUSE for MICROPROCESSOR NO POWER RELAY NO POWER SWITCH NO TEMPORARY SWITCH NO SERVICE SWITCH NO TRANSFORMER NO VARISTOR NO FUSE CAPACITY TIME DELAY FUSE THERMOSTAT REMOTE CONTROL SWITCH LIQUID CRYSTAL REFRIGERANT CHARGING UNIT VOLUME Refrigerant 410A WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE MAX PIPES MODEL RAS 07GH4 RAC 07GH4 and RAS 09GH4 RAC 09GH4 Figure showing the installation of Indoor anf Outdoor unit A CAUTION The installation height of indoor unit must be 2 3m or more in a non public area 5 above 50mm must not bend 0 45m above 300mm above Maximum pipe length 10m M
70. s not operate is 12V is not generated in the control circuit e When the service switch is used for operation each change switch is overridden e Setting the service switch to Cooling turns on the Stick relay and Power relay 52 S3 OO938 AGOW SNISNIAS 3015 ONIONIMS AGOW dO ONIZIIVILINI 3018 NOILVH3dO ONIuna NOIL VH3dO 35NVHO NOILVH3dO LXAN LV 3ZUlIVILINI 401997430 SNISOTO SNIMS ONIZIIVI LINI ONIONIMS 3018 HOV3 NOILVH3dO ONIuna 330 HOLIMS NIV D AZITVILINI ONIMS 3018 YOLVINOYIO D 3ZITTVILINI ONIMS ONIN 3015 1009 NO HOLIMS NIV dOLS AHVHOdN31 GALLINSNVYL SI SNIMS Q3HV319 SI 3qON ONIMS 1 5 3015 ONIONIMS NIVOV 5 LYVLS 3015 AYVYHOdWAL YOLVINOYIO Add OLNV NOILVH43dO 440 OWH3H 340 TVNH31NI NO OWH3H NO TVNH31NI LN3INOIN 3H L LY 3015 ONIONIMS D ONIONIMS LYVLS YOLVINOYIO LY 3015 6
71. t NOTE You can set only one of the OFF timer ON timer and ON OFF timer 16 2 Press the TIME button ly n NL 74 Pos AM PM 1 1 Example The current time is 1 30 p m 3 Set the current time with the TIMER control button 4 Press the TIME button again The time indication starts lighting instead of flashing 41 e The time indication will disappear 70 automatically in 10 second C PM eat To check the current time setting PM 7 press the TIME button twice The setting of the current time is now complete P 25 the turn off time with the 3 Point the signal window of the remote controller toward the indoor unit and TIMER control button press the RESERVE button P The O OFF mark starts lighting instead of flashing and the sign G RESERVED D PM HEU lights beep occurs and the TIMER lamp lights on the indoor unit My e PM 7 Example The device will turn off at 11 00p m 9 The setting of turn off time is now complete J N 2 set the turn on time with the TIMER control button AJ NE gt ZEN AM r r 3 Point the signal window of the remote controller toward the indoor unit and press the RESERVE button The ON mark starts lighting instead of flashing and the G RESERVED sign lights A beep o
72. t exchanger fin and blocked the evaporation water flow to drain pan The water will drop on tangential fan and cause water splashing out from indoor unit 2 Please switch off the unit and turn off the circuit breaker during cleaning the e high speed fan inside the unit may cause danger e Turn off the circuit breaker if the unit is not to be operated for a long period aD 8 e Do not climb on the outdoor unit or put objects on it e Do not put water container like vase on the indoor unit to avoid water dripping into the unit Dripping water will damage the insulator inside the unit and causes short circuit e When operating the unit with the door and windows opened the room humidity is always above 8096 and with the air deflector facing down or moving automatically for a long period of time water 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 f 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 NAMES AND FUNCTIONS OF EACH PART INDOOR UNIT OUTDOOR UNIT RAC 07GH4 RAC 09GH4 177 777
73. ted in advance In installing the unit having been repaired be careful to prevent the occurence of any accident such as electrical shock leak of current or bodily injury due to the drop of any part To check the insulation of the unit measure the insulation resistance between the power cord plug and grounding terminal of the unit The insulation resistance should be 1MQ or more as measured by a 500V DC megger The initial location of installation such as window floor or the other should be checked for being and safe enough to support the repaired unit again If it is found not so strong and safe the unit should be installed at the initial location reinforced or at a new location be placed about the location of installation Check the grounding to see whether it is proper or not and if it is found improper connect the grounding terminal to the earth WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1 5 The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufacturers during maintenance and handling thereof They apply the same to handling of abnormal goods such as rejected goods being returned Object parts 1 Micro computer 2 Integrated circuits IC 3 Field effect transistors FET 4 P C boards or the like on which the parts mentioned in 1 and 2 of this paragraph are equipped Items to be observed in
74. temperature As the settings are stored in memory in the remote controller you only have to press the START STOP button next time 14 FAN OPERATION You can use the device simply as an air circulator Use this function to dry the interior of the indoor unit at the end of summer N eee Press the FUNCTION selector so that the display indicates FAN Press the FAN SPEED button lt Press the D START STOP button Fan operation starts with a beep Press the button again to stop operation FAN SPEED AUTO When the AUTO fan speed mode is set in the cooling heating operation N e The fan speed will automatically change according to the temperature of discharged air e When the difference of room temperature and setting temperature is large fan starts to run at HI speed e When the room temperature reaches setting temperature fan speed changes to LOW automatically For the heating operation e When the difference of room temperature and setting temperature is large fan starts to run at HI speed For the cooling operation After room temperature reaches the preset temperature the cooling operation which changes the fan speed and room temperature to obtain optimum conditions for natural healthful cooling will be performed HOW TO SET THE TIMER Time Day Month TIME DAY After you cha
75. ts with a LO fan speed 1 The operation stops during a heating operation while the room temperature is set at 30 The outdoor fan does not move at a heating operation by the service switch OU VY UY 22 Auto fresh defrosting It is not a trouble The fan is stopped to avoid cold wind Defrosting is on Wait for 5 10 minutes unit the outdoor unit is defrosted speed followed by MED fan speed for 30 seconds and then by HI fan speed If a heating operation is per formed when the exterior temperature is high the op eration may stop to protect the equipment The heating operation starts with a LO fan speed for 30 seconds If the fan speed is set to HI the operation starts with LO fan It is not a trouble When heating the outdoor fan is stopped to avoid ex cessive pressure rise Heating has been turned off by the main operation but the Hot keep lamp lights and the outdoor unit operations Q11 When starting the operation the heat exchanger is cold and therefore the fan is stopped Wait 2 3 minutes 55 A11 Auto fresh defrosting operates When stopping the operation whether the outdoor unit is frosted or not is checked and if in the affirmative defrosting is performed before stopping the operation Automatic operation How is
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77. unit DE The fan speed is always LO at a dehumidifying operation 20 To improve the dehumidi N fication efficiency LO fan speed operation is performed Therefore the air is cold This is not a trouble 2 At a dehumidifying operation the actual room temperature is compared with the room tem perature setting when starting the operation and the opera tion is as follows 1 When actual room tem perature gt room tempera ture setting The operation is according to the room temperature setting on the remote con troller When actual room tem perature lt room tempera ture setting Regardless of the room temperature setting the temperature is automati cally set slightly lower than the room temperature In this case the status is as 2 and therefore the operation by the room temperature control is impossible Turn off the On OFF switch set the room temperature to a new value and turn on the opera tion by the On Off switch This is the status in 2 of A4 The temperature is set a little lower than the room temperature to carry out a dehumidifying operation as far as possible 54 Heating operation Air does not come out when starting a heating operation Air does not come out sometimes while in a heating operation 2 The fan speed is set to HP N or MED but the heating operation star
78. unting 60 280 Discharge grill 400 H deflector 190 70 About 380 lt About 350 i eec Drain hose Approx 370 50 Indoor unit service space Front panel Drain pan gt lt When piping is drawn horizontally exchange the drain hose for the drain cap Drain cap connection port Narrow pipe 06 35 View from back Pipe lead out Approx 108 s Power cord SS Connecting cord Wide pipe 09 52 V deflector Note 1 more space is required above the unit 17 5 Servicing space of 100mm or more is required on the left and right sides of the indoor unit and also 50mm or 2 Insulated pipes should be used for both the narrow and wide dia pipes 3 Piping length is within 15m RAS 14GH4 10m RAS 07GH4 RAS 09GH4 4 Height different of the piping between the indoor unit and the outdoor unit should be within 5m 5 Power supply cord length is about 2m 6 Connecting cable 2 5mm dia x 3
79. witch The resistance must be infinite 2 Normal Check the continuity between contacts 4 Thermal fuse for 96 C Continuity across If there is no continuity JL therminal board also check the fan motor and capacitor 5 Thermal fuse for 102 C Continuity across If there is no continuity V Terminal board check the electric parts and replace if abnormal Set the remote controller to an operation status and press the ON 2 Before checking the varistor detach a terminal OFF button Is the level LO approx 0 5V between driver IC701 pin power P ower relay abnormal Replace Power rela relay and OV Y YES NO Compressor does not turn at LO Is the level LO approx 0 5V between driver 701 pin stick relay and 0V Stick relay abnormal Replace Stick relay YES 8 15 voltage normal between Blue and Red of the CN6 53 Indoor fan motor or Q904 abnormal YES JD Is the level LO approx 0 5V between driver IC 701 pin 3 Reversing valve Replace Reversing Reversing valve relay and OV at relay abnormal valve relay heating operation YES 60 Is voltage normal approx 280 Check the circuit board of 300V at out put side of the DB201 control board YES
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