Hitachi RAC-07CH4 Service Manual Download Page 50

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Wireless remote controller

A18

The room temperature os
settable within the range of
16 - 32 and not beyond.

When the room temperature
setting is “16”, pressing the
room temperature control
button “ V ” causes no
transmission. At “32”,
pressing “

” causes no

transmission either.

Q18

A19

Isn’t the time over the prepro-
grammed time?
As soon as the prepro-
grammed time is reached, the
time setting disappears.

In spite of timer
“Preprogram”, setting is
extinguished.

Q19

A20

At a “Dehumidifying”
operation, the “LO” fan speed
is forcibly selected.

After selecting a
“Dehumidifying” operation
mode, the fan speed mode
remains “LO” fan speed.

Q20

When setting the current time,
its indication blinks for
approxinately 3 minutes.

Summary of Contents for RAC-07CH4

Page 1: ...AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT MARCH 2004 H A P M SPECIFICATIONS TYPE WALL TYPE INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT MODEL RAS 07CH4 RAC 07CH4 RAS 09CH4 RAC 09CH4 POWER SOURCE 1Ø 220 V 50 Hz TOTAL INPUT W 680 870 COOLING TOTAL AMPERES A 3 15 4 1 CAPACITY kW 2 05 2 50 B T U h 7 000 8 500 TOTAL INPUT W 630 860 HEATING TOTAL ...

Page 2: ...y accident such as electrical shock leak of current or bodily injury due to the drop of any part 8 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 1MΩ or more as measured by a 500V DC megger 9 The initial location of installation such as window floor or the other should be check...

Page 3: ... and storing of parts Even rejected goods should be handled in the same way 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 be...

Page 4: ...the screwed part using a rag plate Soldering iron Grounding wire Fig 4 Grounding a soldering iron Use a high insulation mode 100V 10MΩ or higher when ordinary iron is to be used 7 In checking circuits 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 Metal plate of aluminium stainless steel etc Stapl...

Page 5: ...peration and then re started in a moment cooling 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 4 This room air conditioner should not be used at the cooling operation when the outside temperature ...

Page 6: ...g should be insulated with the enclosed insulation pipe If the insulator is insufficient please use commercial products The difference in height between the indoor and outdoor unit should be kept below 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 connecti...

Page 7: ...T PROTECTOR NO NO NO NO FUSE for MICRO COMPUTER 3 0 A NO POWER RELAY G4A NO G4A NO POWER SWITCH YES NO YES NO TEMPORARY SWITCH YES NO YES NO SERVICE SWITCH YES NO YES NO TRANSFORMER YES NO YES NO VARISTOR 450NR NO 450NR NO NOISE SUPPRESSOR NO NO NO NO REMOTE CONTROL SWITCH LIQUID CRYSTAL YES NO YES NO THERMOSTAT YES IC NO YES IC NO FUSE CAPACITY 10 A TIME DELAY FUSE UNIT 630 g 700 g REFRIGERANT CH...

Page 8: ...nstruct the unit by yourself 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 the unit by yourself A circuit breaker should be installed depending on the mounting site of the unit Without a circuit breaker the danger of electric shock exists Do not install near location where there is flammable gas Th...

Page 9: ...ndows opened the room humidity is always above 80 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 If the amount of heat in the room is above the cooling or heating capability of the unit for example ...

Page 10: ...ion Refer page 9 Horizontal Deflector Vertical Deflector Air outlet Refer page 20 Remote Control 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 Air inlet Back and left side Air outlet Blow out warm air MODEL NAME AND DIMENSIONS MODEL WIDTH mm HEIGHT mm DEPTH mm RAS 07CH4 RAS 09CH4 785 265 168 RA...

Page 11: ...R TEMPORARY SWITCH Use this switch to start and stop when the remote controller does not work Use non conductor stick example toothpick By pressing the temporary switch the operation is done in previously set operation mode 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 POWER SWITCH RAS RAS Tempor...

Page 12: ...tes for protection 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 U...

Page 13: ...RT STOP button next time You can raise or lower the temperature setting as necessary by maximum of 3 C 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 wi...

Page 14: ...quiet Set the desired room temperature with the TEMPERATURE button the display indicates the setting 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 The temperature setting and the actual room temperature may vary somewhat depending on conditions As the settings are stored in memory in...

Page 15: ... function will stop the indoor unit will stop emitting air as soon as the room temperature becomes lower than the setting temperature Dehumidifying Function Press the FUNCTION selector so that the display indicates 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 Th...

Page 16: ...the TEMPERATURE button the display indicates the setting The range of 25 28 C is recommended as the room temperature for cooling If the temperature setting is 27 C the room temperature will be controlled at around 27 C The temperature setting and the actual room temperature may vary somewhat depending on conditions Press the START STOP button Cooling operation starts with a beep Press the button a...

Page 17: ...t HI speed When the room temperature reaches setting temperature fan speed changes to LOW automatically For the cooling operation When the difference of room temperature and setting temperature is large fan starts to run at HI speed After room temperature reaches the preset temperature the cooling operation which changes the fan speed and room temperature to obtain optimum conditions for natural h...

Page 18: ...blinks Set the turn off time with the TIMER control button Press the RESERVE button 3 Press the ON TIMER button so that the OFF mark lights and the ON mark blinks Press the ON TIMER button the ON mark blinks on the display Press the OFF TIMER button The OFF mark blinks on the display You can set the device to turn off at the present time RESET HOW TO SET THE TIMER How to Cancel Reservation Point t...

Page 19: ...ton Set the current time with the TIMER control button Set the turn off time with the TIMER control button Set the turn on time with the TIMER control button Set the turn on time with the TIMER control button Press the TIME button again The time indication starts lighting instead of flashing The time indication will disappear automatically in 10 second To check the current time setting press the T...

Page 20: ...l continue working for the designated number of hours and then turn off 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 Example If you set 3 hours sleep ti...

Page 21: ...d 2 C above the temperature and the FAN SPEEDwillbesettoLOWsetting 30 minutes after the setting of the sleep timer The settings of room temperature and circulation are varied 2 C 5 C Sleep timer set 2 hours later 30 minutes later 30 minutes later 3 hours later 7 hours later 3 hours later 1 hour later Sleep timer set 2 hours later 6 hours later 7 hours later NOTE If date or current time is not set ...

Page 22: ...and down and also set to the desired angle using the AUTO SWING button If the angle of the deflector is changed it will not return to the auto set position after operations start unless the operation mode is switched 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 abo...

Page 23: ...rection of the batteries should match the marks in the case Push and pull to the direction of arrow CAUTION 1 Donotusenewandoldbatteries ordifferentkindsofbatteries together 2 Take out the batteries when you do not use the remote controller for 2 or 3 months HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER ...

Page 24: ...ng period of time Occasionally open the door and windows to allow the entrance of fresh air At night please use the OFF or ON timer 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 Dusty air filter will reduce the air volume and the cooling efficiency To prevent from wasting electric energy p...

Page 25: ...od 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 OFF Interference From Electrical Products Caution To avoid noise interference please place the indoor unit and its remote controller at least 1m away from electrical products When Lightning Occurs Warning To prot...

Page 26: ... used So set the fan speed to HIGH when using it in this condition Recommended to replace the air cleaning filter after every 3 months for normal usage Type number for this air cleaning filter is SPX CFH3 Please use this number for ordering when you want to renew it Remove dust from the filter using a vacuum cleaner If there is too much dust use neutral detergent After using neutral detergent wash...

Page 27: ...ed or broken Is the mounting frame seriously affected by rust and is the outdoor unit tilted or unstable Air Blow Confirm PLEASE CHECK THE FOLLOWING POINTS EVERY EITHER HALF YEARLY OR YEARLY CONTACT YOUR SALES AGENT SHOULD YOU NEED ANY HELP Running the unit setting the operation mode to FAN and the fan speed to HI for about half a day on a fine day and dry the whole of the unit Disconnect the powe...

Page 28: ...emitted from the room air conditioner because the various odor emitted by smoke foodstuffs cosmetics and so on sticks to it So please clean the air filter and the evaporator regularly to reduce the odor When it does not cool well WHEN ASKING FOR SERVICE CHECK THE FOLLOWING POINTS Please contact your sales agent immediately if the air conditioner still fails to operate normally after the above insp...

Page 29: ... 27 HOW TO REPLACE NEW UV LED AND FILTER Open the front cover 1 2 Cut the binder Lift up the left side of the evaporator ...

Page 30: ... view Remove tape at the cabinet Remove aluminium tape at the cabinet Remove tape at the electrical box Disconnect the connector between UV LED and electrical box 4 Remove the K spring 5 Pull up the ACL holder 6 ...

Page 31: ... UV LED 7 If necessary change the ACL filter SPX CFH9 After replace new UV LED and filter make sure to reattach the aluminium tape 8 Put back the K spring 9 Connect the connector between UV LED and electrical box 10 ...

Page 32: ... 30 11 Rear view Reattach tape at the cabinet Reattach tape at the electrical box Reattach the evaporator to its place 12 Reattach the binder ...

Page 33: ... 31 Put back the front cover 13 ...

Page 34: ...About 400 VIEWED FROM BACK VIEWED FROM BACK PIPE LEAD OUT PIPE LEAD OUT 167 5 450 167 5 92 58 58 Drain outlet Drain hose Drain pan 25 43 Narrow pipe ø6 35 Wide pipe ø9 52 55 5 Drain cap connection part When piping is drawn When piping is drawn horizontally exchange the drain hose for the drain cap 147 56 17 5 Air outlet Handle Air inlet 18 490 Handle Viewed from P 157 245 225 8 10 500 35 12 16 55 ...

Page 35: ...ATURE C F INDICATION 16 INDICATION 24 INDICATION 32 RESISTANCE VALUE Ω RED INTERNAL THERMAL FUSE BLACK CAPACITOR MODEL 1 3 A2 M A3 Cr T F A1 2 6 5 4 RAS 07CH4 RAS 09CH4 RAS 07CH4 RAS 09CH4 RAC 07CH4 RAC 09CH4 M 541 0 A2 87 6 A1 148 3 A3 147 4 PHASE SINGLE RATED VOLTAGE 220 240V RATED FREQUENCY 50 Hz OUTPUT 10 W 20 W POLE NUMBER 4 6 M 551 6 A2 89 3 A1 151 2 A3 150 3 WA 348 2 WM 284 6 MAIN PARTS COM...

Page 36: ...M 3 154 RA 5 315 RM 3 834 When the refrigerating cycle has been operated for a long time with the capillary tubes clogged or crushed or with too little refrigerant check the color of the refrigerating machine oil inside the compressor If the color has been changed conspicuously replace the compressor COMPRESSOR MOTOR When the Air conditioner has been operated for a long time with the capillary tub...

Page 37: ...ITOR H 2 5 µF CAPACITOR I FAN MOTOR PROTECTOR J LINE CORD K TERMINAL BOARD L OUTDOOR FAN RELAY M THERMAL FUSE FOR PCB N REVERSING VALVE P POWER RELAY Q THERMAL FUSE FOR TERMINAL BOARD R SURGE ASSORBER S THERMISTOR T TRANSFORMER UP OVERLOAD PROTECTOR V VARISTOR W SOLID STATE RELAY FOR FAN FAN SSR X FUSE Y REVERSING VALVE RELAY Z AUTO SWEEP MOTOR BLU BLUE GRY GRAY BLK BLACK YEL YELLOW ORN ORANGE PNK...

Page 38: ... BRN RED RED BRN ORG ORG GRY GRY GRY GRY YEL WHT WHT BLK BLK BLK BLK BLK GRY BLK GRY RED RED RED BRN WHT WHT WHT BLU BLU ORN ORN BLU RED WHT BLU YEL GRY WHT WHT WHT BLK BLK GRY BLU BLU CN4 CN12 3 0A CN1 CN8 CN7 2 I CN3 CN3 CN10 CN11 CN2 CN2 6 WHT L C D N INDOOR UNIT OUTDOOR UNIT 1 2 3 4 4 3 8 A B A B C D R901 UV LED BOARD ...

Page 39: ...105 C106 C201 C202 C205 C206 C401 C501 C502 C503 C504 C601 C701 D VX D VX D VX D VX C C C C C C C F C D WX H H H H C C C C H H H H C C CAPACITOR C301 C302 C303 C C C C C C C801 C C 1000µ 35V 100µ 16V 100µ 10V 33µ 6 3V 0 1µ 25V 0 1µ 25V 0 1µ 25V 0 1µ 25V 1000P AC250V 1000P AC250V 1000P AC250V 1µ 400VAC 0 1µ 25V 33µ 10V 0 1µ 25V 0 1µ 25V 0 1µ 25V 1000P 50V MODEL NO FORM SYMBOL Q301 C C C C TRANSISTO...

Page 40: ...AN 0 AV CC 64 63 62 61 60 59 58 57 56 55 54 53 52 51 49 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 50 RES IRQ IRQ4 TM0E P4 7 P4 6 P4 5 P4 4 P4 3 P4 2 P4 1 P4 0 P1 6 P5 0 P5 1 P5 4 P7 1 P7 2 P7 3 P7 6 P7 4 P7 5 P7 7 VCC P9 1 P9 2 P9 3 P9 4 P9 5 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 P5 2 P5 3 P5 5 P5 6 P5 7 P1 7 P6 0 P6 1 P6 2 P6 3 P6 4 P6 5 P6 6 P6 7 P7 0 X1 X2 IC1 P9 0 0V 1 2 3 4 5 ...

Page 41: ...r relay is delayed by 2 seconds from the start of thermostat operation 1 In case of Automatic mode HI MED or LO operation is executed according to the thermostat signal Refer to Thermostat operation Same as on the left Same as on the left Same as on the left 1 When the set temperature is lower than the room temperature The min ON time of the power relay is 3 minutes and the min OFF time also is 3 ...

Page 42: ...switch or at the time of OFF timer count up defrosting is executed before operation stop The defrosting signal is not accepted at the time of overload input Other detailed specifications 1 When the room temperature rises within 3 minutes after thermostat OFF during cooling operation with automatic velocity the blowing velocity changes in the order of S L H in the same way as at the time of thermos...

Page 43: ...m IC401 is wrong Heat exchanger thermistor error Heat exchanger thermistor open or short circuit detected Room thermistor error Room thermistor error open or short circuit detected 1 Service switch at Indoor has been set to COOL position 2 Control P W B damaged IC401 is not in order 1 Thermistor 2 Indoor control circuit board 1 Thermistor 2 Indoor control circuit board No Mode of Timer Lamp blinki...

Page 44: ...oling Defrost Comp 9 52 9 52 6 35 6 35 6 35 6 35 6 35 6 35 4 76 6 35 6 35 8 0 Indoor Unit 6 35 11 0 9 0 9 0 9 52 9 52 Reversing Valve Suction Tank Service Valve 3 8 Service Valve 1 4 Strainer Capillary Charging Pipe Strainer Union 1 4 Outdoor Unit Union 3 8 Comp COOLING DEFROST 9 52 9 52 6 35 6 35 6 35 6 35 6 35 6 35 4 76 6 35 6 35 8 0 Indoor Unit HEATING REFRIGERATION CYCLE ...

Page 45: ... INITIALIZING CONDITION OF EACH MODE ONE SWING CLOSING AIR DEFLECTOR 1 DOWNWARD 2 UPWARD INITIALIZE 1 DOWNWARD INITIALIZE 1 DOWNWARD 2 UPWARD STOP AT THE MOMENT START SWINGING 1 DOWNWARD 2 UPWARD 3 DOWNWARD STOP AT THE MOMENT ONE SWING CLOSING AIR DEFLECTOR 1 DOWNWARD 2 UPWARD INITIALIZE AT NEXT OPERATION INITIALIZE AT NEXT OPERATION STOP DURING ONE SWING STOP DURING SWINGING TEMPORARY STOP DURING...

Page 46: ...he remote controller 2 When actual room room temperature setting Regardless of the room temperature setting the temperature is automatically set slightly lower than the room temperature In this case the status in 2 is the case and therefore the operation by the room tempera ture control is impossible Turn off the ON OFF button set the room temperature to a new value and turn on the operation by th...

Page 47: ...LO fan speed followed by MED fan speed for 30 seconds and then by HI fan speed The operation stops during a heating operation while the room temperature is set at 30 Q9 A9 If a heating operation is performed when the exterior temperature is high the operation may stop to protect the equipment The outdoor fan does not move at a heating operation by the service switch Q10 A10 It is not a trouble Whe...

Page 48: ...ed The room temperature cannot be controlled at an automatic operation Q14 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 Cooling When room temperature is approx 27 C or higher Dehumidifying Whe...

Page 49: ...s 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 an Automatic operation the room temperature setting is not displayed However every pressing or V button changes 1 C within the range of 27 3 C when cooling 23 3 C when heating V The room temperature sensing thermistor in the indoor unit detects the room temper...

Page 50: ...transmission either Q18 V A19 Isn t the time over the prepro grammed time As soon as the prepro grammed time is reached the time setting disappears In spite of timer Preprogram setting is extinguished Q19 A20 At a Dehumidifying operation the LO fan speed is forcibly selected After selecting a Dehumidifying operation mode the fan speed mode remains LO fan speed Q20 When setting the current time its...

Page 51: ... 53 7 3 20 8 27 2 17 12 26 24 25 13 11 9 14 6 5 4 1 29 23 30 21 20 22 PARTS LIST AND DIAGRAM MODEL RAS 07CH4 RAS 09CH4 ...

Page 52: ...T COVER ASSEMBLY 12 PMRAS 05C 009 1 MOUNTING PLATE 13 PMRAS 07CH4 006 1 REMOTE CONTROL 14 PMRAS 07CH2 014 1 CYCLE ASSEMBLY 17 PMRAS 05C 041 1 STEP MOTOR 20 PMRAS 07CH2 003 1 PWB MAIN AND INDICATION 21 PMRAS 07CH4 005 1 PWB POWER 22 PMRAS 07CH4 007 1 TRANSFORMER 23 PMRAS 07CH2 006 1 TERMINAL 2P 24 PMRAS 07CH2 007 1 TERMINAL 2P WITH THERMAL FUSE 25 PMRAS 18CP2R 002 1 POWER SWITCH 26 PMRAS 07CH2 008 ...

Page 53: ...T COVER ASSEMBLY 12 PMRAS 05C 009 1 MOUNTING PLATE 13 PMRAS 07CH4 006 1 REMOTE CONTROL 14 PMRAS 07CH2 014 1 CYCLE ASSEMBLY 17 PMRAS 05C 041 1 STEP MOTOR 20 PMRAS 09CH2 001 1 PWB MAIN AND INDICATION 21 PMRAS 07CH4 005 1 PWB POWER 22 PMRAS 07CH4 007 1 TRANSFORMER 23 PMRAS 07CH2 006 1 TERMINAL 2P 24 PMRAS 07CH2 007 1 TERMINAL 2P WITH THERMAL FUSE 25 PMRAS 18CP2R 002 1 POWER SWITCH 26 PMRAS 07CH2 008 ...

Page 54: ... 56 MODEL RAC 07CH4 RAC 09CH4 3 1 7 10 8 9 2 11 5 4 15 14 17 18 12 16 6 50 30 31 52 51 13 ...

Page 55: ...1 SIDE PLATE R 10 PMRAC 05CV 907 1 SIDE PLATE L 11 PMRAC 05CV 908 1 HANDLE 12 PMRAC 09CHA1 903 1 D GRILL 13 PMRAC 07CH4 901 1 COMPRESSOR 600W 10KG 14 RAC 2226HV 805 3 COMPRESSOR RUBBER 15 KPNT1 001 3 PUSH NUT 16 PMRAC 26CHA1 901 1 CONDENSER 17 PMRAC 26CHA1 902 1 2S VALVE 18 PMRAC 10C7 906 1 3S VALVE 30 PMRAC 10C8 905 1 FAN MOTOR CAPACITOR 1 5µF 440V 31 PMRAC 07CV1 006 2 TERMINAL BOARD 2P 50 PMRAC ...

Page 56: ...1 SIDE PLATE R 10 PMRAC 05CV 907 1 SIDE PLATE L 11 PMRAC 05CV 908 1 HANDLE 12 PMRAC 09CHA1 903 1 D GRILL 13 PMRAC 09CHV1 901 1 COMPRESSOR 750W 10KG 14 RAC 2226HV 805 3 COMPRESSOR RUBBER 15 KPNT1 001 3 PUSH NUT 16 PMRAC 26CHA1 901 1 CONDENSER 17 PMRAC 26CHA1 902 1 2S VALVE 18 PMRAC 10C7 906 1 3S VALVE 30 PMRAC 10C8 905 1 FAN MOTOR CAPACITOR 1 5µF 440V 31 PMRAC 07CV1 006 2 TERMINAL BOARD 2P 50 PMRAC...

Page 57: ... 59 PM NO 0205E Printed in Malaysia RAS 07CH4 RAC 07CH4 RAS 09CH4 RAC 09CH4 ...

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Hitachi RAC-07CH4, Service Manual

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