Download
Share
Print this page
  1. Manuals
  2. Brands
  3. Hitachi Manuals
  4. Air Conditioner
  5. RAS-10JH3
  6. Service manual

Hitachi RAS-10JH3 Service Manual

Hide thumbs

Advertisement

Quick Links

Download this manual
SERVICE MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
OUTDOOR UNIT
RAC-10JH3
RAC-14JH3
SPECIFICATIONS
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
COOLING
CAPACITY
TOTAL INPUT
TOTAL AMPERES
HEATING
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
APRIL
2009
INDOOR UNIT
RAS-10JH3
RAS-14JH3
INDOOR UNIT
RAS-10JH3
1 PHASE, 50Hz, 220-230V
(W)
580 (155 - 1,160)
(A)
3.11 - 2.97
(kW)
2.50 (0.90 - 3.10)
(B.T.U./h)
8,530 (3,070 - 10,580)
(W)
795 (115 - 1,170)
(A)
4.02 - 3.85
(kW)
3.40 (0.90 - 4.40)
(B.T.U./h)
11,600 (3,070 - 15,010)
W
790
H
298
D
210
(kg)
10
INDOOR UNIT + OUTDOOR UNIT
Hitachi Household Appliances (Wuhu) Co., Ltd.
AW
RAS-10JH3 / RAC-10JH3
RAS-14JH3 / RAC-14JH3
REFER TO THE FOUNDATION MANUAL
SPECIFICATIONS ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 
HOW TO USE ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 
CONSTRUCTION AND DIMENSIONAL DIAGRAM ‥‥ 
MAIN PARTS COMPONENT ‥‥‥‥‥‥‥‥‥‥ 
WIRING DIAGRAM ‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 
BLOCK DIAGRAM‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 
BASIC MODE ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 
REFRIGERATING CYCLE DIAGRAM ‥‥‥‥‥‥ 
DESCRIPTION OF MAIN CIRCUIT OPERATION ‥‥‥ 
SERVICE CALL Q & A
TROUBLE SHOOTING
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY‥‥ 
PARTS LIST AND DIAGRAM ‥‥‥‥‥‥‥‥‥ 
DC INVERTER (WALL TYPE)
OUTDOOR UNIT
INDOOR UNIT
RAC-10JH3
RAS-14JH3
※ 
750 (+91)
548
※ 
288
(+47)
35
NO. 0031E
CONTENTS
‥‥‥‥‥‥‥‥‥‥‥‥ 
‥‥‥‥‥‥‥‥‥‥‥‥ 
OUTDOOR UNIT
RAC-14JH3
1 PHASE, 50Hz, 220-230V
990 (155 - 1,380)
4.74 - 4.54
3.50 (0.90 - 4.00)
11,940 (3,070 - 13,650)
1,040 (115 - 1,350)
4.98 - 4.76
4.20 (0.90 - 5.00)
14,330 (3,070 - 17,060)
790
750 (+91)
298
548
210
288
(+47)
10
35
After installation
※ 
4
5
22
24
26
29
30
37
38
68
72
102
105
※ 
※ 

Advertisement

loading

Related Manuals for Hitachi RAS-10JH3

Summary of Contents for Hitachi RAS-10JH3

  • Page 1 750 (+91) 750 (+91) DIMENSIONS (mm) ※  ※  (+47) (+47) NET WEIGHT (kg) After installation ※  SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT + OUTDOOR UNIT APRIL 2009 Hitachi Household Appliances (Wuhu) Co., Ltd.
  • 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 In quiet operation or stopping the running, slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally, but this noise is not abnormal for the operation. 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 RAS-10JH3 RAC-10JH3 MODEL RAS-14JH3 RAC-14JH3 FAN MOTOR 40W (DC350V) 25W (DC35V) FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR — EU1011E7 COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR OVERHEAT PROTECTOR FUSE (for MICROPROCESSOR) 3.0A POWER RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH...
  • Page 7 - 5 -...
  • Page 8 - 6 -...
  • Page 9 - 7 -...
  • Page 10 - 8 -...
  • Page 11 - 9 -...
  • Page 12 - 10 -...
  • Page 13 - 11 -...
  • Page 14 - 12 -...
  • Page 15 - 13 -...
  • Page 16 - 14 -...
  • Page 17 - 15 -...
  • Page 18 - 16 -...
  • Page 19 - 17 -...
  • Page 20 - 18 -...
  • Page 21 - 19 -...
  • Page 22 - 20 -...
  • Page 23 - 21 -...
  • Page 24 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAS-10JH3, RAS-14JH3 Unit : mm INDOOR UNIT Service space Top air suction grill Front panel Mounting plate Cabinet Horizontal Air outlet air diflector Wireless remote Ventilation hole controller Drain ※ When piping is drawn from the left side, exchange the drain hose for the drain cap.
  • Page 25 MODEL RAC-10JH3, RAC-14JH3 OUTDOOR UNIT Unit : mm 19.5 27.5 Handle Air outlet Air suction Handle Rear side Air suction Holed for anchor bolt (2-φ12×16 slots for φ8.0 bolt) Notch for anchor bolt (for 2-φ8.0 bolt) Fixing hole Drain hole Drain hole Service space More than...
  • Page 26 MAIN PARTS COMPONENT THERMOSTAT Thermostat Specifications MODEL RAS-10JH3, RAS-14JH3 THERMOSTAT MODEL OPERATION MODE COOL HEAT 16.7 (62.1) 18.7 (65.7) INDICATION 16.0 (60.8) 19.3 (66.7) TEMPERATURE 24.7 (76.5) 26.7 (80.1) INDICATION ℃  ( ° F) 24.0 (75.2) 27.3 (81.1) 32.7 (90.9) 34.7 (94.5)
  • Page 27 COMPRESSOR MOTOR Compressor Motor Specifications MODEL RAC-10JH3, RAC-14JH3 ITEM COMPRESSOR TYPE EU1011E7 POWER SOURCE DC 220 - 350 V OUTPUT 800W (U ) WHITE WINDING (W ) (V ) YELLOW 20 ℃  2M = 1.069 RESISTANCE (Ω) 75 ℃  2M = 1.300 WHITE COMPRESSOR YELLOW...
  • Page 28 WIRING DIAGRAM CAUTION MODEL RAS-10JH3 / RAC-10JH3 RAS-14JH3 / RAC-14JH3 The marked parts very important ones for safety. INDOOR UNIT SINGLE PHASE AC220-230V 50HZ TERMINAL CONNECTING POWER BOARD CORD SWITCH ３   Ａ  ４   ２   １   Ｂ ...
  • Page 29 MODEL RAS-10JH3, RAS-14JH3 １   ２   ３   ４   ５   ６   ７   ８   ９   １ ０   １ １   １ ２   １ ３   １ ４   １ ５   １ ６  ...
  • Page 30 MODEL RAC-10JH3, RAC-14JH3 １   ２   ３   ４   ５   ６   ７   ８   ９   １ ０   １ １   １ ２   １ ３   １ ４   １ ５   １ ６   ・...
  • Page 31 BLOCK DIAGRAM MODEL RAS-10JH3 / RAC-10JH3 RAS-14JH3 / RAC-14JH3 INDOOR UNIT OUTDOOR UNIT Outdoor DC fan motor Power source 1ø 50Hz 220-230V HARMONICS POWER POWER RELAY IMPROVEMENT SWITCH RECTIFIER CIRCUIT Inrush current DC compressor Protection circuit motor Rotor magnetic pole position...
  • Page 32 BASIC MODE MODEL RAS-10JH3, RAS-14JH3 Air Purifier OFF ON Room temperature Silent Operates at "Silent" regardless of Set to "Silent" in modes other than when Silent the room temperature. the compressor stops. - 30 -...
  • Page 33 Mode data file RAS-10JH3 RAS-14JH3 VALUE LABEL NAME WMAX 3800 min 4500 min WMAX2 3800 min 4500 min WSTD 3150 min 3900 min WJKMAX 2800 min 3300 min WBEMAX 2500 min 2800 min WSZMAX 2500 min 2500 min CMAX 3300 min 3800 min CMAX2 3300 min 3800 min CSTD 2050 min 3150 min CJKMAX 1800 min 2200 min CBEMAX 1600 min 1700 min...
  • Page 34 Table 1 Thermo judgment Basic Cooling Operation Item Temperature Thermo judgment (ON) 30℃ Room CLMXTP temperature Thermo judgment (OFF) 32℃ Room temperature Thermo judgment (ON) 31℃ Outdoor temperature Thermo judgment (OFF) 33℃ Temperature set for cooling and dehumiditying (value set by remote control [+]) Table 2 Compressor speed 20min.
  • Page 35 Cooling Sleep Operation    One-More Timer Dehumidifying Operation When time setting reservation is 1, 2 or 3 hours. Room temperature SFTMOR Setting 0.5hr One-more timer inhibited 30min. Set to 2 hours One-more timer monitoring 1 hour Sleep button Max. 4 hours Start Stop button...
  • Page 36 Table 3 Compressor speed Basic Heating Operation Calculated Temperature compressor speed difference (with shift value) 10JH3 14JH3 –1 –1 1.66℃ 3100 3100 min 3600 min –1 3600 min –1 2.00℃ Heating set temperature (remote control set temperature 3800 min –1 4100 min –1 2.33℃...
  • Page 37 Fresh Air In During Sleep Mode Automatic Two Way Air Exchange Mode Two-way air exchange lamp Operation lamp Remote control 1-hour cooling sleep reservation Indoor fan Fan Lo Operation mode set by remote control Timer lamp Horizontal air Fan position Operation mode set by remote control deflector Operation lamp...
  • Page 38 Heating Sleep Operation・One-More Timer Reversing Valve Defrosting 15min. and above More than defrosting inhibiting period Auto fresh defrosting Room temperature 30sec. 30sec. Fan speed Stop Start/Stop button set to “Hi” Defrost signal Preheating cancelled Preheating cancelled Preheating cancelled Preheating cancelled Preheating cancelled Preheating cancelled Preheating judgment...
  • Page 39 REFRIGERATING CYCLE DIAGRAM MODEL RAS-10JH3 / RAC-10JH3 RAS-14JH3 / RAC-14JH3 Silencer Service valve Single-ended union Reversing valve Charge port Silencer Electric Expansion valve Single-ended Service valve union Strainer Strainer Silencer Service valve Reversing Single-ended union valve Charge port Silencer Electric Expansion valve...
  • Page 40 DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAS-10JH3, RAS-14JH3 1. Reset Circuit NORMAL : HI RESET : LO Microcomputer R552 IC521 Fig. 1-1 Power "OFF" Power "ON" Voltage 5.0V Voltage supply to pin 2 of IC521 Reset enter at 4.2V Reset release at 4.4V Voltage 5.0V...
  • Page 41 2. Receiver Circuit Q141 R212 R141 ZD141 C211 RECEIVER I/P R211 R611 C611 Microcomputer Fig.2-1 IRR (light receiving unit) receives the infrared signal from the wireless remote controller. The receiver amplifie and shapes the signal and outputs it. 3. Buzzer Circuit R721 IC711 Microcomputer...
  • Page 42 4. Snap Motor Circuit (Horizontal Air Deflector, Ventilation Damper) １ ２ Ｖ  Ｃ Ｎ ５  １   Ｄ ７ ３ ３  ２  Ｒ ７ ３ ５  Ｍ  ３  Ｑ ７ ３ ３  ２ ２  φ ４  ４  Ｉ Ｃ ７ １ １   ５ ...
  • Page 43 5. Initial Setting Circuit (IC401) • When power is supplied, the microcomputer reads the data in IC401(E PROM) and sets the preheating activation value and the rating and maximum speed of the compressor, etc. to their initial values. • Data of self-diagnosis mode is stored in IC401; data will not be erased even when power is turned off.
  • Page 44 7. Fan Motor Drive Circuit CN10 Micro computer DC fan Fan motor motor output R751 C751 DC fan motor Speed feedback R631 C631 Fig. 7-1 Voltage at point A Waveform T1 = Low speed T2 = High speed Voltage at point B Waveform Voltage at point C Waveform...
  • Page 45 8. Ventilation Fan Motor Circuit K-12V CN11 Microcomputer VENTILATION DIFECTION R934 VENTILATION FAN OUTPUT Fig. 8-1 ③  CN11 Voltage waveform T1: Low-speed rotation T2: High-speed rotation Convert to analog voltage at the ventilation fan motor internal circuit. When T2 When T1 Fig.
  • Page 46 9. Dirt Sensor (Gas Sensor) Circuit <Sensor Output characteristics> a Point Voltage Dirt Sensor Input R312 Dirt Sensor Microcomputer (Gas Sensor) IC501 GS421 Stability Time Dirty Air Return to Clean Air Dirt Sensor to be turned on. Fig. 9-1 The Dirt Sensor(Gas Sensor) works by making use of the change of resistance value which occurs with the gas-sensing element heated by the heater, depending upon the dirtiness of the air (gas).
  • Page 47 MODEL RAC-10JH3, RAC-14JH3 1. The electrical parts for the outdoor unit is composed of two P.W.B. (a power P.W.B. and main P.W.B.) and a harmonics improvement circuit as shown in Fig. 1-1. • MAIN P.W.B. This P.W.B. is equipped with the rectification diode, DC fan motor control circuit and the circuits around the micro computer which take various controls.
  • Page 48 2. Power circuit This circuit is to convert the power from AC which is provided from the terminal A and B to DC voltage and produces an AC current which does not exceed the harmonic amplitude limit of the IEC61000-3-2. When the compressor is stopped, the AC voltage becomes about 300 V and while the compressor operates, it is about 280 V.
  • Page 49 (3) C021 and C022 This smoothes the voltage rectified for operating the compressor. When the input voltage is taken for the sine wave as shown in the top of Fig. 2-4, it is rectified by the DB2 and becomes the waveform as shown in the middle of Fig.
  • Page 50 3. Indoor/Outdoor Interface Circuit The interface circuit superimposes an interface signal on the DC 35V line to perform communications between indoor and outdoor units. This circuit consists of a transmitting circuit which superimposes an interface signal transmit from the microcomputer on the DC 35V line and a circuit which detects the interface signal on the DC 35V line.
  • Page 51 Fig. 3-1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other. CONTROL P.W.B. Fig. 3-1 - 49 -...
  • Page 52 Outdoor microcomputer Pin Indoor microcomputer Pin 35V DC line 33ms. 100ms. 1 frame Leader Fig. 3-2 Voltages Waveforms of Indoor / Outdoor Microcomputers (Outdoor to Indoor Communications) Outdoor microcomputer Pin Indoor microcomputer Pin 35V DC line 4.95ms. 33ms. Transmit/receive 1 frame switching time Fig.
  • Page 53 〜 〜 〜 〜 〜 〜 - 51 -...
  • Page 54 Compressor minimum rotation speed(4 MSB) Compressor minimum rotation speed(3) Compressor minimum rotation speed(2) Compressor minimum rotation speed(1) Compressor minimum rotation speed(0 LSB) OVL up Fan-7-step request 15/20(A) Actual compressor rotation speed(5 MSB) Compressor command speed(7 MSB) Actual compressor rotation speed(4) Compressor command speed(6) Actual compressor rotation speed(3) Compressor command speed(5)
  • Page 55 4. IPM (Intelligent Power Module) • Fig.4-1 shows the intelligent power module and its peripheral circuit. The three transistors on the positive side are called the upper arm, and the three transistors on the 狷 negative side, the lower arm. 狹...
  • Page 56 Intelligent power module switches power supply current according to position of the compressor motor rotor. The switching order is as shown in Fig. 4-2. – At point E : U is ON, V is ON (circuit in Fig. 4-1) – At point F : U is chopped (OFF), V is ON (circuit in Fig.
  • Page 57 – Fig. 4-4 Power module circuit (U is OFF, V is ON) – Since current flows at point B only when U transistor and V transistor are ON, the current waveform at point B becomes intermittent waveform as shown in Fig.4-3. Since current at point B is approximately proportional to the input current of the air conditioner, input current is controlled by using DC current (Id) detection resistor.
  • Page 58 • IPM drive circuit The inverter driving device (IGBT) and the drive circuit are built in the IPM. The IPM receives the signal from the microcomputer and convert it to 0 – 15 V signal to drive the IGBT. When the unit operates at low speed, a chopper signal is emitted from the micro computer as shown in Fig.
  • Page 59 5. Power Circuit for P.W.B. • Fig. 5-1 shows the power circuit for P.W.B. AC220-230V C 0 0 7 C 0 1 2 C 0 1 4 C 0 0 8 C 0 1 3 C 0 1 5 R 4 3 R 4 4 Z D 0 2 7 10...
  • Page 60 • The voltage specification of the power circuit is as follows. <Check points> Output Voltage Main load Measuring points Potential failure modes spec. – 11-13V MAIN P.W.B. (CN3, CN4) R701 (“12V” display) R006 (“0V” display) The unit won’t operate C21 (“12V” display) J27, J30 MAIN P.W.B.
  • Page 61 6. Microcpomputer's Peripheral Circuits 6-1. Overload control circuit (OVL control circuit) Overload control is to decrease the speed of the compressor and reduce the load when the load on the air conditioner increases to an overload state, in order to protect the compressor, electronic components and power breaker.
  • Page 62 Detection DC Current Resistor Direct Current R003 R004 Q501 R513 Power P.W.B. R514 R906 R613 Microcomputer R612 R248 −  R245 R222 CN4B CN4A C009 R005 D001 R287 D208 Reset output −  Reset R288 R252 0V 0V 0V Main P.W.B. Fig. 6-2 (1) IS OVL The voltage amp.
  • Page 63 R003,R004,R608,R613, detect the DC voltage at the power circuit. The microcomputer receives a DC voltage and applies correction to the overload set value so the DC current will be low when the DC voltage is high. (Since the load level is indicated by the DC voltage multiplied by DC current, R247, R248 and R249 are provided to perform the same overload judgement even when the voltage varies.) DC voltage : Low DC current : High...
  • Page 64 6-2. Reset Circuit MAIN P.W.B. R287 D208 Microcomputer RESET OUT. −  R252 RESET C204 IC5(1/2) R288 0V 0V 0V 0V Fig. 6-7 The reset circuit initializes the microcomputer program when Power is “ON” from “OFF”. Low voltage at pin 48 resets the microcomputer , and HI activates the microcomputer. Fig.
  • Page 65 7. Temperature Detection Circuit MAIN P.W.B. O.H. thermistor R304 C304 R301 DEF. thermistor Microcomputer R305 C303 R302 Outdoor temperature thermistor CN10 R306 Outdoor temperature C302 R303 Fig. 7-1 The Over heat thermistor circuit detects the temperature at the surface of the compressor head, the Defrost. thermistor circuit detects the defrosting operation temperature.
  • Page 66 8. Reversing valve control circuit C-35V Power P.W.B. MAIN P.W.B. Reversingvalve valve R701 D701 PQ701 Micro computer CN4B CN4A Q701   R705 DC voltmeter R706 or multimeter D-0V Fig. 8-1 Reversing valve control circuit will switch reversing valve ON/OFF according to instruction from indoor microcomputer depending on the operation condition shows in Table 8-1.
  • Page 67 9. Electric expansion valve control circuit POWER P.W.B. MAIN P.W.B. B-12V B-12V CN15 B-12V R403 R404 R401 Microcomputer PQ401 R293 Valve4 PQ402 R294 Valve3 Electric PQ403 R295 Valve2 expansion valve PQ404 R296 Valve1 CN4B CN4A 12 13 C401 B-0V Fig. 9-1 •...
  • Page 68 10. Outdoor DC Fan Motor control circuit This model uses DC Fan Motor which has a controller circuit built in the Motor. This DC Fan Motor will rotate by control voltage apply to Vsp input. (Voltage range: 1.7 to 7V DC) Vsp high : Faster ;...
  • Page 69 < Reference > When operation stop with LD301 blinks 12 times, it may be caused by faulty DC fan motor. In this case, please check CN6 and CN12 connection first. It makes Fan Motor Lock also if those connectors are in misconnection. DC Fan Motor has broken invites 1A Fuse burned.
  • Page 70 SERVICE CALL Q & A MODEL RAS-10JH3 / RAC-10JH3 RAS-14JH3 / RAC-14JH3 COOLING MODE The compressor has Check if the indoor heat If the air conditioner operates stopped suddenly during exchanger is frosted. in cooling mode when it is cooling operation.
  • Page 71 AUTO FRESH DEFROSTING After the ON/OFF button is pressed Auto Fresh Defrosting is carried out : the system checks the outdoor heat exchanger to stop heating, the outdoor unit is and defrosts it as necessary before stopping still working with the OPERATION operation.
  • Page 72 When the “Sleep” timer is set during (1) The temperature arrives at the preset indoor operation, temperature and the air conditioner unit is (1) The indoor fan won’t rotate. temporarily stopped. Within about 3 minutes, (No air comes from the unit) the fan starts rotation.
  • Page 73 TWO WAY AIR EXCHANGE MODE • There is a restriction to the length of the two way air Up to what length the two way air exchange hose (maximum length is 3m). exchange hose can be extended? Is there any limit to the number of bending •...
  • Page 74 TROUBLE SHOOTING MODEL RAC-10JH3, RAC-14JH3 PRECAUTIONS FOR CHECKING Power inlet WARNING Remember that voltage of 175 V is applied to the 0V line on the P.W.B. or the like as shown in the right diagram. Always keep your hands and metallic things away WARNING from the cabinet.
  • Page 75 DISCHARGE PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT WARNING Caution • Voltage of about 350 V is charged between the terminal of smoothing capacitors (400µF x 2). • During continuity check for each circuit part of the outdoor unit, be sure to discharge the smoothing capacitors.
  • Page 76 STRUCTURE OF AN INDOOR UNIT ELECTRIC PARTS MODEL RAS-10JH3, RAS-14JH3 Screw for fix electrical parts Ｅ ｌ ｅ ｃ - ｃ ｏ ｖ - ｕ   Screw for fix wire of earth Ｅ ｌ ｅ ｃ - ｃ ｏ ｖ - ｓ   The lower projection of electrical parts shall be sure to be hooked in cabinet.  When installing the parts, use caution not to pinch any code between the   part and cabinet. Removing electrical parts 1.
  • Page 77 Other Cautions (1) Cautions concerning ICP (IC Protector) 1. Use due caution for short circuit in servicing. Short circuit will open the ICP immediately. 2. When the ICP opens, remove the cause of this phenomenon and replace the ICP. If the remedy is improper, the ICP may open again. 35V line ICP2 Indoor unit fan motor...
  • Page 78 THE SUPPORT FUNCTION OF FAILURE DIAGNOSIS Function Name Description Self-diagnosis indication • The "timer lamp" indicates the failure mode detected on the indoor unit side by function its blinking frequency while the "filter lamp" indicates the failure mode detected on the outdoor unit side by its frequency. <Indication on the indoor unit side>...
  • Page 79 Self-Diagnosis Memory Function This function is to display the diagnosed failure modes stored in the non-volatile memory of the indoor unit by remote controller operation. This is effective to check the failure mode in the case where the power was turned off or operation was restarted without checking the lamp blinking frequency.
  • Page 80 TROUBLESHOOTING WHEN TIMER LAMP BLINKS. MODEL RAS-10JH3, RAS-14JH3 Perform troubleshooting according to the number of times the indoor timer lamp. SELF-DIAGNOSIS LIGHTING MODE MODEL RAS-10JH3, RAS-14JH3 Blinking of Timer lamp Reason for indication Possible cause Reversing valve defective (1) Reversing valve defective...
  • Page 81 Perform troubleshooting according to the number of times of the indoor filter lamp blink. Filter lamp blink mode Reason of indication Possible cause Peak current cut 2 times Reference the outdoor self 2 sec. diagnosis lamp blinks, to perform the trobleshooting. Abnormal low speed rotation 3 times 2 sec.
  • Page 82 SELF-DIAGNOSIS LIGHTING MODE MODEL RAC-10JH3, RAC-14JH3 IPM  INTELLIGENT  POWER MODULE LD301 SELF DIAGNOSIS LAMPS LD302 LD303 SERVICE SWITCH - 80 -...
  • Page 83 OUTDOOR UNIT Remove the compressor connector. INTELLIGENT POWER MODULE LD301 SELF DIAGNOSIS LAMPS LD302 SERVICE SWITCH LD303 • Check the drive If your first attempt With the unit set in the operating circuit (IPM) using fails, wait 3 minutes state, press the start/stop the PRD checker.
  • Page 84 HE KING THE INDOOR/OUTDOOR UNIT ELE TRI ALPARTS AND REFRIGERATING Trouble shoot according to the Is the indoor unit "timer lamp" blinking? self-diagnosis lighting mode. Open the indoor unit and check the voltage Run the unit using the following remote controller settings: ①...
  • Page 85 CHECKING THE INDOOR UNIT ELECTRICAL PARTS 1. Power does not come on (no operation) Is AC220-230V being generated between Is AC220-230V being generated at Check AC outlet and breaker, and terminals A and B on the indoor unit AC outlet? repair any defective part.
  • Page 86 2. Indoor fan does not operate (others are normal) The microcomputer fan PWM Can the fan be stopped by remote Replace the microcomputer. . output (at pin 24 ) is 1 - 5V. control? Replace the fan motor. . Replace the microcomputer. . Perform final operation check.
  • Page 87 4. Check the control P.W.B. (power circuit) Is 35V being output at pin 5 Check to see if the connection cables are relative to 0V at pin 3 of disconnected or reversed. CN3? If normal, check the outdoor unit P.W.B. Is 12V being output at (+) Is ICP1 normal? relative to 0V at (-) of...
  • Page 88 5. Failure Phenomenon: Ventilation fan motor does not operate <Situation> Ventilation fan motor does not operate. Two way air exchange lamp blinks (lit for 4 seconds and off for 1 second). “Timer lamp blinks 16 times” is not stored in the self-diagnosis memory. <Assumed points of failure>...
  • Page 89 6. Failure Phenomenon: Two way air exchange lamp blinks <Situation> Two way air exchange lamp blinks (lit for 4 seconds and off for 1 second). Dirt sensor is not functioning. “Timer lamp blinks 17 times” is not stored in the self-diagnosis memory. <Assumed points of failure>...
  • Page 90 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 91 WARNING PRECAUTIONS FOR SERVICING Be sure that the power switch is turned off or the power cable is disconnected before servicing. Removing the P.W.B.s. System Configuration of Outdoor Unit Electrical Parts. The outdoor unit electrical parts consist of two P.W.B.s as shown in the figure. <Main P.W.B.
  • Page 92 [C. Power Factor Improvement capacitor] Designed to improve power factor. To replace the capacitor, remove the power P.W.B. and then: 1. Remove two screws fastening the capacitor seat. 2. Slide the capacitor seat in the direction of the arrow. Sliding Direction - 90 -...
  • Page 93 - 91 -...
  • Page 94 - 92 -...
  • Page 95 - 93 -...
  • Page 96 - 94 -...
  • Page 97 - 95 -...
  • Page 98 - 96 -...
  • Page 99 - 97 -...
  • Page 100 (JUDGING BETWEEN GAS LEAKAGE AND CHECKING THE REFRIGERATING CYCLE COMPRESSOR DEFECTIVE) 1. Troubleshooting procedure (No operation, No heating, No cooling) Lighting mode Blinks Blinks Blinks Blinks Blinks Blinks Connect U,V,W phase leads to the Self- 2 times 3 times 4 times 5 times 6 times 8times...
  • Page 101 HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT MODEL RAC-10JH3, RAC-14JH3 1. Turn off the power switch. 2. Remove the electrical box cover. 3. Turn on the power switch. 4. After waiting for 30 seconds, push the service switch for a second. LD303 (red) will light and the unit will operate in the forced cooling mode at this time.
  • Page 102 IPM (Intelligent Power Module) DIAGNOSIS SSM1001MA Circuit diagram of Collector the device Emitter Circuit diagram of the module Terminals symbol mark of the module See next page for measuring value using multimeter - 100 -...
  • Page 103 To find the malfunction either the power supply of power P.W.B. or internal IC, please follow the - 101 -...
  • Page 104 PROCEDURE FOR DISASSEMBLY AND REASSEMBLY 〈INDOOR UNIT〉 MODEL RAS-10JH3, RAS-14JH3 1. Front Panel, Air Purifying Unit 2. Top Grill, Front Cover (1) Hold both sides of the front panel and lift up. (1) Lift up while pressing the top grill and remove from tab. (3...
  • Page 105 3. Indicating P.W.B.(at display panel) 6. Dew-free assembly (1) Remove the lead wire (CN2). (1) Detach the claws (2 points) fixed to the cabinet. (2) Detach the claws for fixing the P.W.B. and pull out the (2) Hold the both sides of the dew-free assembly and P.W.B.
  • Page 106 (6)Remove each connector and earth cable from 〈OUTDOOR UNIT〉 MODEL RAC-10JH3, RAC-14JH3 the lead wire. 1. Electrical parts (7)Remove four lock screws from the main P.W.B. (1)Remove the service value cover lock screws and pull two support hooks at the front side to and lower the cover to remove it.
  • Page 107 PARTS LIST AND DIAGRAM INDOOR UNIT MODEL: RAS-10JH3, RAS-14JH3 - 105 -...
  • Page 108 INDOOR UNIT PARTS   N O. Q'TY PARTS   N AME RAS-10JH3 RAS-14JH3 HWRAS-25JX5 CABINET HWRAS-25JX5 UPPER COVER HWRAS-D10EX FAN MOTOR 25W 1.1KG HWRAS-D10EX GRILL HWWSI425 TANGENTIAL FAN HWRAS-D10EX FAN SUPPORT ASSEMBLY HWRAS-D10EX FAN COVER HWRAS-D10EX FAN MOTOR SUPPORT HWRAS-D10EX EVAPORATOR ASSEMBLY...
  • Page 109 INDOOR UNIT PARTS   N O. Q'TY PARTS   N AME RAS-10JH3 RAS-14JH3 HWRAS-D10EX P.W.B.(GAS SENSOR) HWRAS-D10EX CONNECTING CORD(3P) HWRAS-D10EX ELECTRIC BOX HWRAS-D10EX ELECTRIC COVER(LOWER) HWRAS-D10EX COVER(POWER SWITCH) HWRAS-D10EX SUPPORT(INDICATING P.W.B.) HWRAS-D10EX SUPPORT(CONTROL P.W.B.) HWRAS-D10EX SUPPORT(POWER SWITCH) HWRAS-D10EX COVER(TEMPORARY SWITCH) HWRAS-D10EX FILTER(EXHAUST)
  • Page 110 OUTDOOR UNIT MODEL: RAC-10JH3, RAC-14JH3 - 108 -...
  • Page 111 OUTDOOR UNIT PARTS   N O. Q'TY PARTS   N AME RAC-10JH3 RAC-14JH3 HWRAC-D10EX2 HWRAC-25YH4 HWRAC-25YH4 HWRAC-25YH4 HWRAC-D10EX2 HWRAC-D10EX2 HWRAC-25YH4 HWRAC-D10EX2 HWRAC-D10EX2 HWRAC-25YH4 HWRAC-D10EX2 HWRAC-25YH4 HWRAC-D10EX HWRAC-25YH4 HWRAC-25YH4 HWRAC-D10EX2 HWRAC-25YH4 HWRAC-25YH4 HWRAC-25YH4 HWRAC-25YH4 HWRAC-D10EX HWRAC-25YH4 HWRAC-25YH4 HWRAC-25YH4 HWRAC-25YH4 HWRAC-25YH4 HWRAC-E08H HWRAC-25YH4 HWRAC-25YH4 HWRAC-D10EX HWRAC-25YH4 HWRAC-25YH4...
  • Page 112 OUTDOOR UNIT PARTS   N O. Q'TY PARTS   N AME RAC-10JH3 RAC-14JH3 HWRAC-25YH4 SERVICE VALVE COVER HWRAC-25YH4 BUSH ASSEMBLY HWRAC-25YH4 BUSH HWRAC-25YH4 DRAIN PIPE HWRAC-25YH4 COVER(CAPACITOR) HWRAC-E08H CORD ASSEMBLY - 110 -...
  • Page 113 RAS-10JH3 / RAC-10JH3 AW NO. 0031E RAS-14JH3 / RAC-14JH3 Printed in Japan (HRT)

This manual is also suitable for:

Rac-10jh3Ras-14jh3Rac-14jh3