Hitachi RAS-10XH1 Service Manual
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Hitachi RAS-10XH1 Service Manual

Hitachi RAS-10XH1 Service Manual

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SERVICE MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
OUTDOOR UNIT
RAC-10XH1
RAC-14XH1
SPECIFICATIONS
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
COOLING
CAPACITY
TOTAL INPUT
TOTAL AMPERES
HEATING
CAPACITY
DIMENSIONS
NET WEIGHT
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
DECEMBER 2008
INDOOR UNIT
RAS-10XH1
RAS-14XH1
INDOOR UNIT
RAS-10XH1
1ø, 220V - 230V, 50Hz
(W)
(A)
(kW)
8,533 (1,707 - 11,604)
(B.T.U./h)
(W)
(A)
(kW)
(B.T.U./h)
10,922 (2,048 - 19,795)
798
W
(mm)
295
H
233
D
(kg)
11.5
INDOOR UNIT + OUTDOOR UNIT
TC
NO. 0792E
RAS-10XH1 / RAC-10XH1
RAS-14XH1 / RAC-14XH1
REFER TO THE FOUNDATION MANUAL
SPECIFICATIONS......................................
HOW TO USE........................................
MAIN PARTS COMPONENT  .. ..........................   
WIRING DIAGRAM  .. ..................................   
BLOCK DIAGRAM .................................... 
BASIC MODE  ........................................   
REFRIGERATING CYCLE DIAGRAM  ..................  
TROUBLE SHOOTING ................................ 
PARTS LIST AND DIAGRAM  .. ........................   
DC INVERTER
OUTDOOR UNIT
INDOOR UNIT
RAC-10XH1
465 (70 - 960)
2.49 - 2.38
2.5 (0.5 - 3.4)
585 (65 -1,410)
3.13 - 2.99
3.2 (0.6 - 5.8)
750 (+86)※
570
288 (+56)※
36
Hitachi Appliances, Inc.
CONTENTS
OUTDOOR UNIT
RAS-14XH1
RAC-14XH1
1ø, 220V - 230V, 50Hz
835 (70 - 1,350)
4.47 - 4.27
3.5 (0.5 - 4.1)
11,946 (1,707 - 13,993)
875 (65 -1,490)
4.68 - 4.48
4.2 (0.5 - 6.1)
14,335 (1,707 - 20,819)
798
750 (+86)※
295
570
233
288 (+56)※
11.5
36
※After installation
4
5
30
32
35
37
43
45
78
79
82
102
110
143

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  • Page 1: Table Of Contents

    NO. 0792E RAS-10XH1 / RAC-10XH1 RAS-14XH1 / RAC-14XH1 SERVICE MANUAL REFER TO THE FOUNDATION MANUAL TECHNICAL INFORMATION CONTENTS FOR SERVICE PERSONNEL ONLY SPECIFICATIONS‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ HOW TO USE‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ INDOOR UNIT CONSTRUCTION AND DIMENSIONAL DIAGRAM‥‥‥‥ MAIN PARTS COMPONENT  ‥ ‥‥‥‥‥‥‥‥‥‥‥‥‥    WIRING DIAGRAM  ‥ ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥   ...
  • Page 2 SAFETY DURING REPAIR WORK 1. 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. 2. 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.
  • Page 3 WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1. Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufactures during maintenance and handling thereof. (They apply the same to handling of abnormal goods such as rejected goods being returned.) 2.
  • Page 4 (6) Use a three wire type soldering iron including a grounding wire. Metal plate (of Al. stainless steel, etc.) Bare copper wire (for body earth) Working table Resistor 1MΩ(1/2W) Staple Earth wirte Fig.3 Grounding of the working table soldering iron Grounding wire Screw stop at the screwed part using a rag plate...
  • Page 5 CAUTION 1. In quiet operation or stopping the running, its heard slight flowing noise of refrigerant in the refrigerating cycle occasionally, but this noise is not abnormal for the operation. 2. When it thunders near by, it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety.

  • Page 6: Specifications

    SPECIFICATIONS RAS-10XH1 RAC-10XH1 MODEL RAS-14XH1 RAC-14XH1 FAN MOTOR 30W (DC280V) 47W (DC380V) FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR   EU1013E1 OVER HEAT PROTECTOR OVERLOAD RELAY FUSE (for MICRO COMPUTER) 25A, 2A, 1A POWER RELAY, STICK RELAY G4AS POWER SWITCH...
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  • Page 32: Construction And Dimensional Diagram

    CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAS-10XH1, RAS-14XH1 Unit : mm SERVICE SPACE FRONT PANEL MOUNTING PLATE DISCHARGE GRILL VERTICAL AIR HORIZONTAL AIR DEFLECTOR DEFLECTOR (159) DRAIN WIRELESS DRAIN HOSE REMOTE DRAIN CAP CONNECTION PORT CONTROLLER ※  When piping is drawn from the left side, exchange the drain hose and the drain cap.
  • Page 33 MODEL RAC-10XH1, RAC-14XH1 Unit : mm 55 190 (26) (19) HANDLE HANDLE AIR SUCTION AIR OUTLET AIR SUCTION View from the rear HOLES FOR ANCHOR BOLT (2- φ 12X16 slots for φ 8.0 bolt) DRAIN HOLE DRAIN NOTCH FOR ANCHOR BOLT HOLE (2- φ 8.0 bolt) FIXING HOLE DRAIN HOLE...

  • Page 34: Main Parts Component

    MAIN PARTS COMPONENT THERMOSTAT Thermostat Specifications MODEL RAS-10XH1, RAS-14XH1 THERMOSTAT MODEL   OPERATION MODE   COOL HEAT 14.7 (58.5) 16.7 (62.1) INDICATION 14.0 (57.2) 17.3 (63.1) 22.7 (72.9) 24.7 (76.5) TEMPERATURE INDICATION ˚C (˚F) 22.0 (71.6) 25.3 (77.5) 30.7 (87.3) 32.3...
  • Page 35 COMPRESSOR Compressor Motor Specifications MODEL RAC-10XH1, RAC-14XH1 COMPRESSOR MODEL EU1013E1 PHASE SINGL RATED VOLTAGE DC120 - 270V RATED FREQUENCY 50 / 60Hz POLE NUMBER WHITE CONNECTION YELLOW 20˚C 2M = 1.21 (68˚F) RESISTANCE VALUE (Ω) 75˚C 2M = 1.47 (167˚F) WHITE YELLOW –...

  • Page 36: Wiring Diagram

    WIRING DIAGRAM OUTDOOR UNIT MODEL RAS-10XH1 / RAC-10XH1 RAS-14XH1 / RAC-14XH1 COMPRESSOR CN24 OUTDOOR INDOOR UNIT COMPRESSOR FAN MOTOR POWER POWER CLEANING UNIT MODULE MODULE POSITION DETECTION OUTDOOR SWITCH WIRELESS FAN MOTOR REMOTE SWITCH CONTROL P. W. B. TWO-WAY CLEANING UNIT...

  • Page 37: Wiring Diagram Of The Printed Wiring Board

    WIRING DIAGRAM OF THE PRINTED WIRING BOARD [Remote controller] RAR-3R5 Key matrix Table 1 When the lid is open ・  ・ ・  Ｐ   ５ ０  ＝   Ｌ   Output Ｐ２  ５   Ｐ２  ６   Ｐ２  ７   Ｐ４ ...
  • Page 38 MODEL RAS-10XH1, RAS-14XH1 １  ２  ３  ４  ５  ６  ７  ８  ９  １０  １１  １２  １３  １４  １５  １６  Ion mist unit Plastic cover Mounting form A : Axial Peltier High voltage R : Radial Ion mist generator P : Radial (7.5mm pitch) generation device Ａ ...
  • Page 39 MODEL RAC-10XH1, RAC-14XH1 １  ２  ３  ４  ５  ６  ７  ８  ９  １０  １１  １２  １３  １４  １５  １６  Mounting form       A:Axial R:Radial P:Radial(7.5mm pitch) H:Manual C:Chip Ａ  Ａ  S:Others P.W.B. set HIC:HIC P.W.B. M:CONTROL P.W.B. (45μF) TAB2 TAB3-4 RESISTOR...

  • Page 40: Block Diagram

    BLOCK DIAGRAM MODEL RAS-10XH1 / RAC-10XH1 RAS-14XH1 / RAC-14XH1 INDOOR UNIT OUTDOOR UNIT Inrush current Protection circuit Power source Compressor Ｍ Power relay 1 φ AC220V-230V Power circuit drive circuit 50Hz DC compressor Indoor / Outdoor Indoor / Outdoor motor...
  • Page 41 BASIC MODE MODEL RAS-10XH1, 14XH1 Operation Dehumidification and Dry cool only by using the operation Dehumidification, Stainless plasma air purifying Cooling Heating Automatic Special automatic (normally not used) selector button. This doesnot include the dehumidification and mode Dry cool Dry cool by using the quick dehumidification or the Dry cool button.
  • Page 42 Details Label name RAS-10XH1 RAS-14XH1 Details Label name RAS-10XH1 RAS-14XH1 ＭＡ Ｘ  WMAX   4700      4700    Balance time Time Normal DEFCMP̲OFF    60  min    60  min  ＭＡ Ｘ ２   WMAX2   4700      4700 ...
  • Page 43 Basic mode for cooling Ｃ Ｌ Ｍ Ｘ Ｔ Ｐ   Room temperature Cooling temperature setting remote control temperature setting ＋  Ｓ Ｈ Ｉ Ｆ Ｔ Ｃ  ２ ０ min. Cool dash period Fan speed set to AUTO Operation Stop Operation Stop START/STOP switch...
  • Page 44 Cooling, sleep As-desired "powerful" operation Ｏ Ｎ  Ｏ Ｆ Ｆ   Remote control "POWERFUL" lit ６ ０   Temperature setting ０ ． ５ ｈ ｒ   １ ｈ ｒ    ９ ｈ ｒ    PWSFTC Set to 9 hours Sleep key Operation monitor lamp Remote control...
  • Page 45 Basic mode for heating Heating temperature setting remote control setting + SHIFTW + SFTSZW Dash per Dash period Dash period ２ ０   fan speed set to AUTO Stop Operation Stop Operation Stop Operation START/STOP switch Thermometer off Thermometer Thermometer Thermometer judgment Maximum length 3' Defrost signal...
  • Page 46 Reversing valve defrost Heating, sleep As-desired "powerful" operation Longer than the defrost 15' or more Auto-fresh defrost inhibit period fan speed 30″  30″  Ｏ Ｎ  set to Stop START/STOP switch "HI" Ｏ Ｆ Ｆ   Ｏ Ｆ Ｆ   Defrost signal Remote control Preheating cancel Preheating cancel...
  • Page 47 Table 1 Room temperature category Table 2 Room temperature category Dehumidifying operation (at the time of operation startup) (during operation) Table 3 External temperature category Room temperature Room Room temperature category External temperature category (relative value from the temperature Room temperature External When the room When the room...
  • Page 48 As-desired "powerful" operation Dehumidifying operation, sleep (1) When reserved for 30 minutes, 1 hour, 2 hours, or 3 hours Ｏ Ｎ  Ｏ Ｆ Ｆ   Ｏ Ｆ Ｆ   Remote control as-desired ０ ． ５ ｈ ｒ   １ ｈ ｒ    3 ｈ...
  • Page 49 Table 1 Room temperature category Table 2 Room temperature category Table 3 External temperature category Dry cool (at the time of operation startup) (during operation) External temperature category External Room Room temperature Room temperature category temperature When the external When the external temperature (relative value from the Room temperature...
  • Page 50 Dry cool, sleep 1) When reserved for 30 minutes, 1 hour, 2 hours, or 3 hours 0.5hr Set a time ２ 時間 時間を設定 設定  Sleep key Operation lamp Remote control "SLEEP" lit Timer lamp lit Indoor unit See "Basic mode." SILENT Sleep See "Basic mode."...
  • Page 51 Laundry Temperature setting Operation details The temperature setting is determined based on the room temperature that was effective at operation startup. (1) Weak heating region "Room temperature setting" = current room temperature + 4℃ (provided that the upper limit is 29℃...
  • Page 52 Dirt monitoring Mold monitoring Monitor lamp Monitor lamp Operation lamp Operation lamp Stop Indoor unit 20 minutes 20 minutes 20 minutes Mist and air 3-minute 3-minute 3-minute 3-minute Lo in dehumidification Lo in dehumidification purification lamp Vertical vane Shut Dehumidification position Shut Dehumidification position Indoor unit...
  • Page 53 Stainless steel plasma air purification operation Ion mist operation AIR PURIFICATION ION MIST button button START/STOP START/STOP button button Remote control Operation lamp "AIR PURIFICATION" lit Mist and air Operation lamp purification lamp Mist and air Indoor unit purification lamp Operating according to the settings made by remote control Operating according to the settings made by remote control Open...
  • Page 54 Internal cleaning Internal cleaning to be programmed by the [FUNCTION SELECTOR] button Cooling, dehumidification, comfortable cooling Internal cleaning period Wind feed period 1 Heating period 1 Heat radiation period 1 Heating period 2 Heat radiation period 2 Wind feed period 2 CLNTIM_STP1 CLNTIM_SUF1 CLNTIM_WAM1...

  • Page 55: Basic Mode

    operation control (1) Pre-filter cleaning system Types of cleaning operation Automatic cleaning: Cleaning conducted automatically when the product is stopped Forcible cleaning: Cleaning conducted when the product is continuously operated Manual cleaning: Cleaning conducted by using the MANUAL CLEANING key on the remote control unit Basic mode (i) Cleaner reciprocated + (ii) cleaning lamp + (iii) lateral vane closed + (iv) front panel closed + (v) tap for indoor unit only...
  • Page 56 operation control (3) Pre-filter cleaning system Forcible cleaning (1) If the air-conditioner has run for more than 24 consecutive [hours], stop it and clean it forcibly. After the cleaning is over, reset it. Manual cleaning (1) This operation aims to make the product ready for use after having left the air-conditioner unused for a long time.
  • Page 57 Operation diagram 2 for filter cleaning (manual and forcible cleaning) 24 consecutive Manual cleaning hours later Forcible cleaning Continued from No. 1 Power Operation stop key Manual cleaning possible more than 5 minutes after the last cleaning and Sleep key when the product is stopped.
  • Page 58 Operation diagram for filter cleaning 4 (remarks) 4. Forcible cleaning 1. Cleaning in general (1) This will not be activated during mold monitoring, isolated (1) If, during cleaning, the remote control is used to start the dirt monitoring, air-conditioner cleaning, nice temperature, air-conditioner by cooling, heating, or other operation, or auto-fresh.
  • Page 59 Operation diagram for filter cleaning (error detection 2) Arrival error (lock) 1. If the limit switch is not detected 3 minutes Power 16 seconds (= 2'46" +30":30" is the safety time) Cleaning initiated after startup, the product will be considered Product command to have an arrival error.
  • Page 60 Option selection Function Remote control setting 1) Remote control ID setting ID selector TIME ▲ + OFF TIMER held down 5 seconds 2) One-more timer selection TIME ▲ + ON TIMER held down 5 seconds 3) Defrost selection 4) Amperage setting FUNCTION SELECTION TIME ▲...

  • Page 61: Refrigerating Cycle Diagram

    REFRIGERATING CYCLE DIAGRAM MODEL RAS-10XH1 / RAC-10XH1, RAS-14XH1 / RAC-14XH1 COOLING CYCLE Service OUTDOOR UNIT INDOOR UNIT valve (3/8"） φ 9.52 φ 12.7 φ 9.52 Charge port    （1/2"） Single-ended union φ 6.35 （3/8"） φ 8.0 φ 7.0 Reversing valve φ 12.7 φ...

  • Page 62: Disassembly & Assembly Procedure

    DISASSEMBLY & ASSEMBLY PROCEDURE MODEL RAS-10XH1, RAS-14XH1 1. Front panel 2. Fancy cover (1) Remove the screw cover from the bottom of the fancy (1) Hold the handheld parts of the front panel and lift it. cover and remove the screws.
  • Page 63 3. Cleaning unit 4. Control P.W.B. components (1) Press the hook lug of the electrical installation lid and (1) Remove the electrode from the fixing lug. remove the lid. (2) Remove the fixing screw from the middle of the fancy (2) From the control P.W.B., remove the lead wires and the cover.
  • Page 64 MODEL RAC-SX10HY, RAC-SX13HY 7. Dew pan components 1. Electrical installation (1) Remove the screws that fix the side cover and lower the (1) Slide and remove the cover of the stepping motor for cover, thereby removing it. lateral vane. (2) Remove the screws from both lateral sides and middle of (2) Remove the lugs fixed to the cabinet.

  • Page 65: Description Of Main Circuit Operation

    DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAS-10XH1, RAS-14XH1 1. Power relay operation Indoor electrical installation Outdoor electrical installation Power relay Smoothing capacitor Control power circuit Power Terminal board Temperature fuse Power relay ON signal (from pin 60 of microcomputer) Indoor/outdoor...
  • Page 66 2. Control power circuit Two-way Indoor fan valve coil motor Ｆ Ｍ  D001 T001 8.5V C126 FU1 3A fuse TH001 L151 D102 D103 1 2 3 4 D101 D131 R134 AC220V-230V IC101 R10 3 C107 R127 IC001 R104 C127 D133 IC102 R123 Primary 0 V...
  • Page 67 3. Drive circuit of the indoor fan motor (DC311V-325V) C208   Q201 Primary 18.5 V C203 D201 Indoor fan motor R201 −  Power signal of indoor fan (from pin %8 of microcomputer) IC683 −  Primary 0 V Rotation speed feedback signal (to pin ^8 of microcomputer) Output signal of indoor fan (to pin $5 of microcomputer) R233 Fig.
  • Page 68 4. Remote control reception circuit   Remote control Q821 light-receiving unit R822 R821    Ⅰ C821 C822 C821 R640 R823 Remote control VOUT reception input Microcomputer IC601 Fig. 4-1   [Typical communication waveform] Approx. 400 ms. Remote control reception input (pin of microcomputer) Beep (reception tone)
  • Page 69 5. Room temperature heat exchanger thermistor circuit Thermistor characteristics (microcomputer input voltage) Microcomputer IC601 Room temperature Ｃ Ｎ ４   thermistor Room temperature thermistor input R406 Heat exchanger thermistor input R407 Heat exchanger thermistor Thermistor temperature （℃）  Fig. 5-2 Fig. 5-1 Thermistor characteristics (voltages between thermistor ends) The room temperature and the temperature of the indoor heat exchanger pipe...
  • Page 70 7. Indoor/outdoor communication circuits Indoor unit side Outdoor unit side Power supply Power relay Inverter circuit 12Ｖ  Terminal board temperature fuse C807 Outdoor microcomputer Ｔ301 Ｒ342 Ｃ341 L801 Indoor transmission circuit R804 C804 Indoor microcomputer (IC601) Ｑ331 Outdoor R803 Indoor/outdoor communication 78  ...
  • Page 71 8. Stepping motor drive circuit Microcomputer Ｃ Ｎ18 12Ｖ  Ⅰ Ｃ601 Driver IC φ4 Front panel − φ4 φ3 Ｍ  Front panel − φ3 φ2 Front panel − φ2 φ1 Front panel − φ1 Front panel motor Ｃ Ｎ12 12Ｖ  φ4 Lateral vane, left −...
  • Page 72 9. Dirt sensor (gas sensor) circuit [Sensor output characteristics] When set to "dirt monitor": Approx 5 V Microcomputer Voltage at point IC601 R667 Dirt sensor power supply R666 Ｑ661 Dirt sensor GS831 Stable time Dirt sensor ａ   input R669 Air purified again Set to "dirt monitoring"...
  • Page 73 10. Ion mist unit Ion mist unit Equipment cover High-voltage generator Peltier Ion mist discharge The equipment has high voltage (about electrode -6 kV), which causes danger. Therefore do not under any circumstances touch Electrode box for anything such as in measuring the dust collection output voltage while the product is 2 3 4...
  • Page 74 11. Cleaner drive circuit R906 Q902 Microcomputer R911 IC601 Ｐ Ａ− ４ Ｐ − （ vertical ）   IC911 IC682 Ventilator power (Lo, OFF; Hi, ON) Clock signal STBY signal Excitation mode R912 setting Forward/reverse signal Cleaning motor Reset signal R913 Vref setting C914...
  • Page 75 ・The cleaner drive circuit comes equipped with a current detection circuit. Normally it runs in silent mode. When the load increases, however, it will switch to high-power mode and increase the torque of the cleaning drive motor. ・The peak motor current in silent mode is about 83 mA, with the peak motor current in high power mode being between about 200 mA and 300 mA.
  • Page 76 MODEL RAC-10XH1, RAC-14XH1 1. Power Circuit TAB2 TAB3-4 CONTROL P.W.B. IPM1 VARISTOR  L001 C012  CT C803 R804 C804 L801 TERMINAL  BOARD SURGE ABSORBER SA  (103) L002 REVERSING VALVE R441 VH-4P-Top COOL/HEAT  CHANGING RELAY REVERSING  VALVE RELAY Fig. 1-1 This circuit produces a DC voltage by changing the AC current of 220 V to 230 V between terminal boards A and ○ ...
  • Page 77 (3) Smoothing capacitors ( C021, C022, 375μF, 420V ) These increase and smoothen (average) the voltages rectified by a diode. TAB2 TAB3-4 Input voltage Fig. 1-2 AC 220-230V DC voltage (approx.320-360V during operation) Fig. 1-3 – 94 –...
  • Page 78 ※Be sure to ground the outdoor unit. (5) NF coils for C001, C002, C004, C005  If ungrounded, the noise filter mentioned above will not These absorb electrical noises generated during a  function normally. compressor run. At the same time, they absorb external noises coming in through the power line, thereby protecting ※If the outdoor unit remains ungrounded, the "surge the electronics parts.
  • Page 79 3. Latch-type reversing valve control circuit ※ Timing for voltage measurement ・This model comes equipped with a latch-type reversing valve. Forcible cooling switch (test switch) ・The latch-type reversing valve is so designed that its valve is "slid" in a specified direction Reversing valve according to a specific operation mode, thereby switching freezing channels and retaining the...
  • Page 80 4. Temperature detection circuit H Ⅰ C ＋5V OH thermistor R203 ＋5V R301 C202 Microcomputer DEF thermistor Normal: 2.4 V or more AX-8W00 DEF: 2.4 V or less Reset: 2.9 V or more R239 ＋5V R302 C216 External temperature thermistor CN10 R240 External temperature...
  • Page 81 5. Electrical expansion valve circuit B-12V C411 ＋ ENABLE C401 LATCH B-0V S-OUT S-IN R416 B-0V P-GND P-GND R417 COM2 COM1 B-0V CN19 (unmounted) IC11 B-0V   ４ Electrical １ expansion ２   ３ valve 1 C421 PQ401 CN15 XA-6P R411 B-0V Microcomputer...
  • Page 82 Table 5-1 Drive states Pin No. of Lead wire CN15 ④  White ③  Yellow ②  Orange ①  Blue Operation modes   1→2→3→4→5→6→7→8 VALVE CLOSE  8→7→6→5→4→3→2→1 VALVE OPEN Connector pin No. ④  1.2V ③  ②  ①  50ms. 75ms. 200ms. Fig. 5-2 Expansion valve control involves detecting the temperature of the compressor head and adjusting the aperture to stabilize it to the target temperature.
  • Page 83 – 100 –...
  • Page 84 6. Control circuit of the DC fan motor ・This model incorporates a fan motor control circuit in its outdoor electrical installation. Outdoor electrical installation VH5P lacking CN24 IPM2 Smoothing capacitor ( 2A fuse ) White ＋  ＋  White Black R746 Fan motor Drive circuit Switching power supply...

  • Page 85: Service Call Q&A

    SERVICE CALL Q&A MODEL RAS-10XH1, RAS-14XH1 Cooling operation The compressor sometimes Cooling when the room Check if the heat stops during cooling. temperature is low may exchanger of the indoor cause the heat exchanger unit is covered with dew. of the indoor unit to gather Wait for 3 to 4 minutes dew.
  • Page 86 Does "new nice temperature It does not work. It will work only in "cooling" reservation" work in and "heating." "dehumidification"? Even when reserved at the same time It is because "new nice temperature reservation" is of the day, the product will start at working.
  • Page 87 I would like to clean the inside of A commercially available detergent or something the air-conditioner with a similar may crack the resin parts or block the commercially available detergent. drainage channel. It may also result in water dripping or electric shock. Therefore please do not use any such product.
  • Page 88 This occurs when the room temperature and humidity I set the "sleep" timer during have reached their settings during dehumidification and operation.But the air-conditioner is in a pause. The product will begin the indoor fan will not run (it will again to run within about 3 minutes.
  • Page 89 I tried in vain to change the setting during You cannot set "quick dehumidification" to "quick laundry" dehumidification and comfortable cooling or "dew control" mode. by using the "humidity" button on the remote control unit. The temperature setting field on the The product will give a display when you operate the product remote control unit displays in "auto"...
  • Page 90 Ion mist What advantages does ion mist Setting the product to ion mist (electrostatic have? atomization) deodorizes curtains and clothes. Collect the moisture from the indoor air into the ion How does ion mist work? mist bin. Apply a voltage of about − 6,000 V to the ion mist bin, ionize it, and discharge it indoors.
  • Page 91 Cleaner ・For an operation check on filter cleaning, the After power-on (after turning ON the power switch, after a power failure, cleaner will make one go and return. At that time, the "clean" lamp will go on. after the breaker is turned on), the ・The one-time operation check will last about 7 product will begin cleaning its filter.
  • Page 92 ・Didn't you open the front panel while cleaning the filter? The cleaner has stopped midway. (The "clean lamp" will go on for 1 second and go dimmed for 1 second.)   ・After servicing the filter cleaning wiper, did you move the cleaner to the right end by remote control?  ...

  • Page 93: Trouble Shooting

    TROUBLE SHOOTING MODEL: RAS-10XH1, RAS-14XH1 Inspection instructions Indoor fan motor Two-way valve coil Indoor electrical installation Outdoor electrical installation ◯  Compressor Power supply motor ◯   Warning 0V line ◯  Note that the 0 V line of the outdoor electrical installation...
  • Page 94 How to stop energizing the discharge procedure and power circuit Warning Cautions ・The smoothing capacitor is charged at a voltage of about 264 to 374 V across it.    ・For an energization check of each part of the circuit of the outdoor electrical installation,  the power circuit is energized as well.
  • Page 95 Other instructions (1) Detaching and reattaching the receptacles for tab terminal All the receptacles for connecting tab terminals are with a locking mechanism. Forcibly pulling any such receptacle without unlocking it will destroy it. Be on guard. When reconnecting it, insert it securely all the way home. ・Receptacle types and how to unlock them Mild resin cover Cancel button...
  • Page 96 Troubleshooting support №  Function Description See page Self-diagnosis display ・The failure mode detected on the indoor unit side is displayed by [Display on the indoor blinking the "timer lamp." And the failure mode detected on the unit side] outdoor unit is displayed by blinking the "monitor lamp." ・If the outdoor unit side detects a failure, the product will first conduct several operation retrials and then blink the "monitor lamp."...
  • Page 97 Self-diagnosis display function (indoor side display) While the "timer lamp" (orange), the "clean lamp" (yellow), the "mist and air purification lamp" (yellow), or "monitor lamp" (yellow) of the indoor unit is blinking, troubleshoot the product while referring to the table below. 1.
  • Page 98 Self-diagnosis memory function Failure modes stored in the nonvolatile memory of the indoor unit are redisplayed by remote control. This is effective in checking the failure mode after you turned off or restarted the product without checking the frequency of lamp blinking on the self-diagnosis display.
  • Page 99 Operation with the forcible cooling switch The product can be forcibly made to perform cooling when you wish to collect the refrigerant or do some troubleshooting. The compressor will be in operation regardless of the room temperature. Therefore avoid running the product continuously for a long time.
  • Page 100 Dividing the freezing cycle for the indoor electrical installation and the outdoor electrical installation Initiating troubleshooting Are the "timer lamp" (orange) or the "monitor lamp" Perform troubleshooting according to the (yellow) of the indoor unit blinking? self-diagnosis display. The product will begin to run in response to a remote control setting: "cooling mode, temperature setting 16 ℃" ...
  • Page 101 Checking the indoor unit electrical installation Introduction First check the failure phenomenon and status, and then move on to elaborate diagnosis. Initiating troubleshooting Move on to "the timer lamp blinks." Is the "timer lamp" (orange) of the indoor unit blinking? (Page 128 and subsequent.) Go on to "checking the electrical installation Is the "monitoring lamp"...
  • Page 102 1. Failure phenomenon: The power will not become turned on. [   ]   Neither initialization, remote control, nor any other step works on the vane position at power-on. Situation Estimated cause of fuse blowout ・ Abnormally high voltage applied to the power supply [ Estimated failure ・...
  • Page 103 2.Failure phenomenon: The product will not receive a remote control signal. [ Situation ]   The product does not receive a remote control signal. It is not very responsive. (The product does run normally in response to the emergency operation switch.) [ Estimated failure ・ Remote control failure, remote control low battery level, remote control poorly set locations ] ・...
  • Page 104 How to identify sources of jamming in the reception of remote control signals [ Situation ] The product may become poorly responsive to remote control signals due to external factors even though the product itself is trouble-free. [ Estimating sources of jamming ] Identify the installation status of the air-conditioner and the indoor and outdoor environments to identify possible causes of the jamming.
  • Page 105 Effects of other Checking points electrical products ・Check the effects of light and power noises coming from other electrical products. ・Turn on and off the electrical products, turn off the power and turn on the power, and check their effects on the reception of remote control signals.
  • Page 106 3. Failure phenomenon: The compressor will not run. [ Situation ] The compressor will not run (the same state as the thermometer turned off), the product receives remote control signals normally. The self-diagnosis lamp (LD301) of the outdoor unit blinks once or becomes turned off. [ Estimated failure locations ] ・Room temperature thermistor, heat exchanger thermistor                                                ・Microcomputer peripheral circuit [ Diagnosis flow ]...
  • Page 107 4. Failure phenomenon: The fan motor will not stop. [ Situation ] I have conducted the stop operation on the product by remote control, but the indoor fan motor will not stop. (It stopped about 3 minutes later.) [ Estimated failure locations ] ・Indoor fan motor ・Fan motor drive circuit [ Diagnosis flow ] Initiating troubleshooting...
  • Page 108 5. Failure phenomenon: The clean lamp is blinking (on for 4 seconds, off for 1 second). [Situation] The clean lamp is blinking (on for 4 seconds, off for 1 second). The cleaner is not operating. The self-diagnosis memory stores "timer lamp blinked 18 times." [Estimated failure locations] ・Mechanical lock of the cleaner ・The connectors CN8 and CN10 loose, lead wire break...
  • Page 109 6. Failure phenomenon: The clean lamp is blinking (on for 1 second, dimmed for 1 second). [Situation] The clean lamp is blinking (on for 1 second, dimmed for 1 second). [Estimated failure locations] ・While the cleaner is running or the electrical dust collector is running,                         ...
  • Page 110 7.Failure phenomenon: The air purification lamp is blinking (on for 4 seconds, off for 1 second). [Situation] The air purification lamp is blinking (on for 4 seconds, off for 1 second). The ion mist unit is not functioning. The self-diagnosis memory stores "timer lamp blinked 11 times." [Estimated failure locations] ・Dirt on the discharge electrode for ion mist and on the discharge electrode for dust collection                            ...
  • Page 111 8.Timer lamp blinking: blinking once [Situation]   The timer lamp blinks once and the product will not run. [Estimated failure locations] ・ Outdoor latch-type reversing valve control circuit out of order, reversing valve connector loose, wire break ・ Latch-type reversing valve mechanically locked, coil wire break ・...
  • Page 112 9. Timer lamp blinking: blinking twice ]  The product is giving a display to indicate that it is performing forcible cooling. Situation (This is not a sign of a breakdown.) 10. Timer lamp blinking: blinking three times ]   The timer lamp blinks three times and the product will not operate. Situation [Estimated failure locations] ・...
  • Page 113 11. Timer lamp blinking: blinking 5 times [Situation] The timer lamp blinks 5 times while the product was stopped. [Estimated failure location] ・Fused contact in the power relay [Caution] ・The failure display is given if the power relay contact has refused to be turned off for 24 consecutive hours while the product is stopped.
  • Page 114 12. Timer lamp blinking: blinking 9 times [Situation] The timer lamp blinks 9 times and the product will not run. [Estimated failure location] ・Loose connector, wire break, or short-circuit in the room temperature thermistor, heat exchanger thermistor, or humidity sensor [Cautions] ・Starting the product by remote control will initiate failure detection.
  • Page 115 13. Timer lamp blinking: blinking 10 times [Situation] The timer lamp blinks 10 times and the product will not run.        [Estimated failure locations] ・Loose connector or wire break in the indoor fan motor                                                  ・Indoor fan motor mechanically locked                                                  ・Indoor fan motor                                                  ・Indoor fan motor drive circuit [Diagnosis flow] Initiating troubleshooting...
  • Page 116 14. Timer lamp blinking: blinking 12 times [Situation] The timer blinks 12 times and the product will not run. [Estimated failure locations] ・Erroneous connection in the indoor-outdoor connection line (F cable)                                          ・Wire break or poor insertion of the indoor-outdoor connection line (F cable)                      ...
  • Page 117 Checking the electrical installation of the outdoor unit – 134 –...
  • Page 118 – 135 –...
  • Page 119 – 136 –...
  • Page 120 – 137 –...
  • Page 121 Self-check If you cannot divide the self-diagnosis lamp (blinking 2 times, 3 times, 4 times, 5 times) between the electrical installation and compressor, conduct the following [self-check]. (The product will energize the intelligent power module on its own and check the inverter.) ・How to conduct self-check diagnosis  1.
  • Page 122 How to run the product with the outdoor unit test switch 1) When you are obliged to start the product on the outdoor unit side for the purpose of servicing 1. Turn off the power, wait for at least 10 seconds, and turn the power back on. 2.
  • Page 123 HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY 1. Connect the large dia. pipe side and small dia. pipe side service valves using a pipe. Parts to be prepared Outdoor unit Connect the small diameter Compressor Reducing union service value and the large Large dia.service valve 2/8"...
  • Page 124 Lighting mode of the self-diagnosis lamp Lighting mode of the self-diagnosis lamp CONTROL P.W.B. TEST SWITCH DC VOLTAGE MESUREMENT D A N G E R (DC350V) POINT ( ＋ ) DC VOLTAGE MESUREMENT CUT THE POWER SOURCE AND WAIT POINT ( − ) MORE THAN 10 MINUTES BEFORE SERVICE WORK.
  • Page 125 CHECKING THE REMOTE CONTROLLER Is battery polarity correct? Install the battery in the correct polarity. Is the battery check sign + – Replace the battery. flashing? Turn on an AM radio, bring the remote control switch within 15 cm of the radio, and press the ON/OFF button.

  • Page 126: Parts List And Diagram

    PARTS LIST AND DIAGRAM MODEL RAS-10XH1, RAS-14XH1 – 143 –...
  • Page 127 MODEL RAS-10XH1, RAS-14XH1 PARTS NO. Q’TY/ PARTS NAME UNIT RAS-10XH1 RAS-14XH1 POWER SUPPLY CORD RAS-35SX8 RAS-S40X2 FAN MOTOR 30W, 1.1kg TERMINAL BOARD (3P) RAS-35SX8 RAS-S40X2 P.W.B. (INDICATION) RAS-25SX8 901 RAS-35SX8 904 P.W.B. (CONTROL) RAS-35SX8 P.W.B. COVER TERMINAL COVER RAS-35SX8 RAF-50Y2 COVER (SWITCH) P.W.B.
  • Page 128 MODEL RAS-10XH1, RAS-14XH1 PARTS NO. Q’TY/ PARTS NAME UNIT RAS-10XH1 RAS-14XH1 RAS-E40V2 FAN SUPPORT ASSEMBLY RAS-S40W2 FAN MOTOR SUPPORT PIPE COVER RAS-S28X RAS-35SX8 COVER (R) (REAR) RAS-35SX8 COVER (R) (LOWER) RAS-35SX8 COVER (L) (LOWER) RAS-S40W2 SCREW CAP RAS-35SX8 PLATE RAS-S28X...
  • Page 129 MODEL RAS-10XH1, RAS-14XH1 PARTS NO. Q’TY/ PARTS NAME UNIT RAS-10XH1 RAS-14XH1 RAS-35SX8 REMOTE CONTROL ASSEMBLY MOUNTING PLATE RAS-S25W RAS-S40W2 REMOTE CONTROL SUPPORT HEAT INSULATOR (PIPE) RAS-E40V2 RAS-10XH1 901 RAS-14XH1 901 LABEL (SPECIFICATION) LABEL(WIRING DIAGRAM) RAS-35SX8 RAS-35SX8 BAND HEAT EXCHANGER ASSEMBLY...
  • Page 130 MODEL RAC-10XH1, RAC-14XH1 ※400 – 147 –...
  • Page 131 MODEL RAC-10XH1, RAC-14XH1 PARTS NO. Q’TY/ PARTS NAME UNIT RAC-10XH1 RAC-14XH1 RAC-25SX8   901 RAC-35SX8   901 P.W.B. (CONTROL) RAC-E40V2 FAN MOTOR (DC) 47W, 1.5kg RAC-35SX8 TERMINAL BOARD (3P) RAC-E28V SUPPORT (FAN MOTOR) RAC-E40V2 TERMINAL COVER RAC-14JH1 REACTOR 1 RAC-X40X2 THERMISTOR (DEFROST) RAS-E40V2 BULB SUPPORT (DEFROST THERMISTOR) RAC-E40V2 COIL (REVERSING VALVE) RAC-F28SX2...
  • Page 132 MODEL RAC-10XH1, RAC-14XH1 PARTS NO. Q’TY/ PARTS NAME UNIT RAC-10XH1 RAC-14XH1 RAC-S28X COMPRESSOR 1,000W, 10kg RAC-S28X CONDENSER RAC-S28X REVERSING VALVE RAC-E40V2 PUSH NUT RAC-E40V2 COMPRESSOR RUBBER RAC-S28X ELECTRIC EXPANSION VALVE RAC-S28X SERVICE VALVE ASSEMBLY RAC-14JH1 REACTOR 2 RAC-35SX8 CAPACITOR 200V, 45μF RAC-35SX8 JUMPER CORD (SELF CHECK) –...
  • Page 133 RAS-10XH1 / RAC-10XH1 TC NO. 0792E RAS-14XH1 / RAC-14XH1 Printed in Japan (HRT)

This manual is also suitable for:

Rac-10xh1Ras-14xh1Rac-14xh1

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