Table of Contents
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SERVICE MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
RAC-07GH4
RAC-09GH4
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
DECEMBER 2003
RAS-07GH4
RAS-09GH4
RAS-14GH4
RAC-14GH4
INDOOR UNIT
OUTDOOR UNIT
RAS-07GH4
1 PHASE, 50 Hz, 220-230-240V
(W)
590-610-630
(A)
2.80-2.80-2.80
(kW)
2.10
(B.T.U./h)
7,160
(W)
490-510-530
(A)
2.30-2.30-2.30
(kW)
2.20
(B.T.U./h)
7,500
W
780
H
280
D
210
(kg)
9.0
INDOOR UNIT + OUTDOOR UNIT
Refrigeration & Air-Conditioning Division
PM
RAS-07GH4 / RAC-07GH4
RAS-09GH4 / RAC-09GH4
RAS-14GH4 / RAC-14GH4
REFER TO THE FOUNDATION MANUAL
SPECIFICATIONS ----------------------------------------------------- 5
HOW TO USE ---------------------------------------------------------- 6
CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 29
MAIN PARTS COMPONENT ------------------------------------- 31
WIRING DIAGRAM -------------------------------------------------- 33
CIRCUIT DIAGRAM ------------------------------------------------- 35
PRINTED WIRING BOARD LOCATION DIAGRAM ------- 37
BLOCK DIAGRAM --------------------------------------------------- 39
BASIC MODE --------------------------------------------------------- 41
REFRIGERATING CYCLE DIAGRAM ------------------------- 47
DESCRIPTION OF MAIN CIRCUIT OPERATION --------- 49
AUTO SWING FUNCTION ---------------------------------------- 53
PARTS LIST AND DIAGRAM ------------------------------------ 63
(WALL TYPE)
INDOOR UNIT
OUTDOOR UNIT
RAC-07GH4
RAS-09GH4
RAC-09GH4
1 PHASE, 50 Hz, 220-230-240V
890-900-950
4.20-4.10-4.10
2.90
9,900
740-770-810
3.50-3.50-3.50
3.00
10,230
700
780
570
280
210
210
32
9.0
NO. 0193E
CONTENTS
INDOOR UNIT
OUTDOOR UNIT
RAS-14GH4
RAC-14GH4
1 PHASE, 50 Hz, 220-230-240V
1060-1090-1120
5.00-5.00-4.90
3.50
11,940
960-1000-1050
4.60-4.60-4.60
3.85
13,140
700
780
750
570
280
570
210
210
280
32
9.0
38
After installation
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Table of Contents
Related Manuals for Hitachi RAS-07GH4
Summary of Contents for Hitachi RAS-07GH4
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Page 1: Table Of Contents
NO. 0193E 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 ----------------------------------------------------- 5 HOW TO USE ---------------------------------------------------------- 6 CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 29 MAIN PARTS COMPONENT ------------------------------------- 31... - 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 manufacturers 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 aluminium, stainless steel, etc.) Working table Resistor of 1 M (1/2W) Staple Earth wire Bare copper wire (for body earth) Fig. 3. Grounding of the working table Soldering iron Grounding wire...
- Page 5 CAUTION 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. 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.
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Page 6: Specifications
SPECIFICATIONS RAS-07GH4 RAS-09GH4 RAC-07GH4 RAC-09GH4 RAC-14GH4 MODEL RAS-14GH4 20 W 30 W FAN MOTOR 20 W 1.5μF, 450 VAC 2.5μF, 450VAC FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR – 5RS080 5RS112 5RS132 COMPRESSOR 20μF, 450 VAC 25μF, 450 VAC COMPRESSOR MOTOR CAPACITOR... - Page 7 MODEL RAS-07GH4 / RAC-07GH4 and RAS-09GH4 / RAC-09GH4 Figure showing the installation of Indoor anf Outdoor unit The installation height of indoor unit must be 2.3m or more in a non public area CAUTION above 50mm above 100mm above 100mm...
- Page 8 MODEL RAS-14GH4 / RAC-14GH4 Figure showing the installation of Indoor anf Outdoor unit The installation height of indoor unit must be 2.3m or more in a non public area CAUTION above 50mm above 100mm above 100mm 2,300mm or more Plug The indoor piping should be insulated with the enclosed insulation pipe.
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Page 9: Safety Precaution
SAFETY PRECAUTION ● Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit. ● Pay special attention to signs of “ 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. - Page 10 PRECAUTIONS DURING OPERATION ● The product shall be operated under the manufacturer specification and not for any other intended use. ● Do not attempt to operate the unit with wet hands, this could cause fatal accident. ● When operating the unit with burning equipments, regularly ventilate the room to avoid oxygen insufficiency.
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Page 11: Names And Functions Of Each Part
• When heating operation, drain or defrosted water flows out from outdoor unit. Don’t close drain outlet portion MODEL NAME AND DIMENSIONS in chilly area so as not to freeze these. MODEL WIDTH (mm) HEIGHT (mm) DEPTH (mm) RAS-07GH4/09GH4/14GH4 RAC-07GH4/09GH4 RAC-14GH4 – 8 –... - Page 12 INDOOR UNIT INDICATORS 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 TEMPORARY This lamp lights during operation.
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Page 13: Names And Functions Of Remote Control Unit
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 fixture provided. Before fixing it, make sure the indoor unit can be controlled from the remote controller. -
Page 14: Automatic Operation
AUTOMATIC OPERATION The device will automatically determine the mode of operation, HEAT, COOL or DEHUMIDIFY depending on the initial room temperature. The selected mode of operation will not change when the room temperature varies. Press the FUNCTION selector so that the display indicates the (AUTO) mode of operation. -
Page 15: Heating Operation
HEATING OPERATION ● 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. ● In order to keep reliability of the device, please use this device above –10°C of the outdoor temperature. Press the FUNCTION selector so that the display indicates (HEAT). -
Page 16: Dehumidifying Operation
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. 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. -
Page 17: Cooling Operation
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. Press the FUNCTION selector so that the display indicates (COOL). -
Page 18: Fan Operation
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. Press the FUNCTION selector so that the display indicates (FAN). Press the (FAN SPEED) button. -
Page 19: How To Set The Timer
HOW TO SET THE TIMER Time, Day, Month Set the current month and TIME, DAY, day with the TIMER control After you change the MONTH button. batteries; (current time, day, month) OFF TIMER RESET ON TIMER OFF-Timer Press the (OFF-TIMER) button. - Page 20 Set the current time with the Press the (TIME) button again. Press the TIMER control button. The time indication starts lighting (TIME) button. instead of flashing. ● The time indication will disappear automatically in 10 second. ● To check the current time setting, press the (TIME) button twice.
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Page 21: How To Set The Sleep Timer
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. Mode Indication 1 hour 2 hours 3 hours 7 hours... -
Page 22: Explanation Of The Sleep Timer
Explanation of the sleep timer The device will control the FAN SPEED and room temperature automatically so 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. -
Page 23: Adjusting The Air Deflector
ADJUSTING THE AIR DEFLECTOR 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 RESET up and down continuously and also set to the desired angle using the “... -
Page 24: How To Exchange The Batteries In The Remote Controller
HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER Remove the cover as shown in the figure and take out the Push and pull to the old batteries. direction of arrow Install the new batteries. The direction of the batteries should match the marks in the case. -
Page 25: Suitable Room Temperature
THE IDEAL WAYS OF OPERATION Suitable Room Temperature Install curtain or blinds Warning It is possible to Freezing temperature reduce heat is bad for health and a entering the waste of electric power. room through windows. Ventilation Effective Usage Of Timer At night, please use the “OFF or ON timer Caution operation mode”, together with your wake up... - Page 26 FOR USER’S INFORMATION The Air Conditioner And The Heat Source In The Room 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.
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Page 27: Attaching The Air Cleansing And Deodorizing Filters
ATTACHING THE AIR CLEANSING AND DEODORIZING FILTERS CAUTION Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning, stop operation and switch off the power supply. Open the front panel. ● Pull up the front panel by holding it at both sides with both hands. - Page 28 MAINTENANCE CAUTION Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning, stop operation and switch off the power supply. AIR FILTER 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.
- Page 29 Washable Front Panel ● Remove the front panel and wash with clean water. Wash it with a soft sponge. After using neutral detergent, wash thoroughly with clean water. ● When front panel is not removed, wipe it with a soft dry cloth. Wipe the remote controller thoroughly with a soft dry cloth.
- Page 30 CAUTION ● 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. ● A circuit breaker should be installed depending on the mounting site of the unit. Without a circuit breaker, the danger of electric shock exists.
- Page 31 AFTER SALE SERVICE AND WARRANTY WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS. CONDITION CHECK THE FOLLOWING POINTS ● Is the fuse all right? ● Is the voltage extremely high or low? When it does not operate ● Is the circuit breaker “ON”? ●...
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Page 32: Construction And Dimensional Diagram
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. - Page 33 MODEL RAC-07GH4 / RAC-09GH4 Handle Air outlet Air inlet Handle Viewed from P MODEL RAC-14GH4 – 30 –...
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Page 34: Main Parts Component
MAIN PARTS COMPONENT THERMOSTAT (Room Temperature Thermistor) Thermostat Specifications MODEL RAS-07GH4/09GH4/14GH4 THERMOSTAT MODEL OPERATION COOL HEAT 16.6 (61.9) 18.7 (65.6) INDICATION 16.0 (60.8) 19.3 (66.7) TEMPERATURE °C (°F) 24.6 (76.3) 26.7 (80.1) INDICATION 24.0 (75.2) 27.3 (81.1) 32.6 (90.7) 34.2 (94.5) INDICATION 32.0 (89.6) - Page 35 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 WHITE ORANGE CONNECTION CAPACITOR 20°C RM = 5.233 RM = 3.192 RM = 2.826 (68°F) RA = 5.621...
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Page 43: Refrigerating Cycle Diagram
REFRIGERANT CYCLE DIAGRAM MODEL RAS-07GH4/RAC-07GH4 COMP S — TANK CONDENSER 3S — VALVE REVERSING VALVE EVAPORATOR HEATING & COOLING CAPILLARY STRAINER 2S—VALVE CHARGING STRAINER PIPE MODEL RAS-09GH4/RAC-09GH4 COMP S-TANK CONDENSER 3S-VALVE REVERSING VALVE EVAPORATOR HEATING HEATING & CAPILLARY COOLING CAPILLARY... - Page 44 MODEL RAS-09GH4/RAC-09GH4 COMP S — TANK ACCUMULATOR CONDENSER 3S — VALVE REVERSING VALVE EVAPORATOR HEATING HEATING & CAPILLARY COOLING CAPILLARY STRAINER 2S — VALVE CHARGING CHECK VALVE STRAINER PIPE – 48 –...
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Page 45: Description Of Main Circuit Operation
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 (Sleeping) When OFF timer (sleeping) is set Operation lamp... - Page 46 2. Reset Circuit Micro computer (AX-3U) Q512 Q511 C512 DC12V Line DC5V Line Base POWER ON POWER OFF Micro computer Pin 26 The reset circuit is used to reset the program to its initial settings when the power is turned on or when the ●...
- Page 47 3. Buzzer Circuit Micro computer (AX-3U) BUZZER When the buzzer is to be activated, buzzer output pin 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.
- Page 48 6. Service Operation Circuit Micro computer R606 (AX-3U) Cool FORCE COOL 42 Normal Use the service switch to select “Cooling” temporarily when the interior electric equipment has troubled. ● Setting the switch to “Cooling” causes continuous cooling room temperature control. To control the room ●...
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Page 50: Service Call Q & A
SERVICE CALL Q & A Cooling operation While cooling, Check whether frost sticks If cooling is performance compressor sometimes stops on the heat exchanger of in- when the room temperature abruptly. door unit or not. is low, frost may stick on the Wait for 3 –... - Page 51 Heating operation Air does not come out when It is not a trouble. The fan is When starting the operation, starting a heating operation. stopped to avoid cold wind. the heat exchanger is cold and, therefore, the fan is stopped. Wait 2–3 minutes.
- Page 52 Automatic operation automatic According to the room operation mode determined? 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.
- Page 53 Common, etc. There difference There may be a difference between room between room temperature setting and temperature setting and actual room temperature. actual room temperature on account room structure, air flow, etc. If there is a difference from the room temperature, adjust the set temperature to keep living space at a comfortable temperature.
- Page 54 Wireless remote controller 1) When the “Automatic” 1) When the operation mode room temperature operation mode is “Automatic”, the fan sensing thermistor in the selected, “Automatic” speed is automatically indoor unit detects the room does not change by fixed to “Automatic”. temperature and, according pressing the fan speed to the particular temperature,...
- Page 55 In spite of timer “Preprogram”, Isn’t the time over the pre- time setting programmed time? extinguished. As soon as the prepro- grammed time is reached, the time setting disappears. After selecting “Dehumidifying” “Dehumidifying” operation operation, the “LO” fan speed” mode, the fan speed mode is forcibly selected.
- Page 56 TROUBLE-SHOOTING No cooling or heating *1 Before using the service switch, No operation at all. disengage and engage the plug. Do not Operates by setting the service operate the remote controller. switch to forced cooling? Check the following parts and replace if faulty 1) Current fuse Remove and check the continuity across.
- Page 57 *4 Wait for 3 minutes before forced Check the circuit board inside parts. re-operation by the service switch. Replace faulty part When checking, carry out a self diagnosis by indoor indicator lamp. CN6 BLUE-RED (V) RAS-07GH4 RAS-09GH4 RAS-14GH4 RAC-07GH4 RAC-09GH4 RAC-14GH4 Fan Speed...
- Page 58 Timer-Lamp, break-down checking in blinking sign. Check the break-down factor from the frequency of timer-lamp blinking. 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 (2) Heat-exchanger thermistor is –...
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Page 59: Parts List And Diagram
PARTS LIST AND DIAGRAM INDOOR UNIT MODEL : RAS-07GH4 / RAS-09GH4 / RAS-14GH4 20 23 25 27 24 – 63 –... - Page 60 MODEL RAS-07GH4 PART N0. Q’TY / UNIT PARTS NAME RAS-07GH4 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 HWRAS-25YH4 DRAIN PAN ASSY...
- Page 61 MODEL RAS-09GH4 PART N0. Q’TY / UNIT PARTS NAME RAS-09GH4 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 HWRAS-25YH4 DRAIN PAN ASSY HWRAS-25YH4 AUTO SWEEP MOTOR HWRAS-25YH4...
- Page 62 MODEL RAS-14GH4 PART N0. Q’TY / UNIT PARTS NAME RAS-14GH4 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 HWRAS-25YH4 DRAIN PAN ASSY HWRAS-25YH4 AUTO SWEEP MOTOR HWRAS-25YH4...
- Page 63 PARTS LIST AND DIAGRAM INDOOR UNIT MODEL : RAC-07GH4 / RAC-09GH4 – 67 –...
- Page 64 MODEL RAC-07GH4 PART N0. Q’TY / UNIT PARTS NAME RAC-07GH4 PMRAC-07GH4 STRAINER (CAPILLARY) PMRAC-07GH4 STRAINER (CONDENSOR) PMRAC-05CV FAN MOTOR SUPPORT PMRAC-10C8 FAN MOTOR PMRAC-25CNH2 902 PROPELLER FAN PMRAC-07CH2 CABINET PMRAC-05CV SIDE PLATE (R) PMRAC-05CV SIDE PLATE (L) PMRAC-05CV HANDLE PMRAC-09CHA1 903 D-GRILL PMRAC-07GH4 COMPRESSOR...
- Page 65 MODEL RAC-09GH4 PART N0. Q’TY / UNIT PARTS NAME RAC-09GH4 PMRAC-09GH4 CHECKVALVE PMRAC-07GH4 STRAINER (CAPILLARY) PMRAC-09GH4 STRAINER (CONDENSOR) PMRAC-05CV FAN MOTOR SUPPORT PMRAC-10C7 FAN MOTOR PMRAC-25CNH2 902 PROPELLER FAN PMRAC-09GH4 CABINET PMRAC-05CV SIDE PLATE (R) PMRAC-05CV SIDE PLATE (L) PMRAC-05CV HANDLE PMRAC-09CHA1 903 D-GRILL...
- Page 66 PARTS LIST AND DIAGRAM OUTDOOR UNIT MODEL : RAC-14GH4 – 70 –...
- Page 67 MODEL RAC-14GH4 PART N0. Q’TY / UNIT PARTS NAME RAC-14GH4 KPNT1 PUSH NUT PMRAC-14GH4 COMPRESSOR RAC-2226HV COMPRESSOR RUBBER PMRAC-25NH4 VALVE (2S) PMRAC-25NH4 VALVE (3S) PMRAC-25NH4 CONDENSOR PMRAC-51CA1 FAN MOTOR SUPPORT PMRAC-18C7 FAN MOTOR PMRAC-25CNH2 902 PROPELLER FAN PMRAC-51CHA1 903 TERMINAL BOARD (4P) PMRAC-09GH4 COMPRESSOR CAPACITOR PMRAC-10C7...
- Page 68 HITACHI RAS-07GH4 / RAC-07GH4 PM NO. 0000E RAS-09GH4 / RAC-09GH4 RAS-14GH4 / RAC-14GH4 Printed in Malaysia...