NO. 0079E RAS-07CH1/RAC-07CHV1 SERVICE MANUAL RAS-09CH1/RAC-09CHV1 TECHNICAL INFORMATION REFER TO THE FOUNDATION MANUAL FOR SERVICE PERSONNEL ONLY CONTENTS SPECIFICATIONS ------------------------------------------------------------------- 5 CONSTRUCTION AND DIMENSIONAL DIAGRAM ----------------------- 6 NAMES AND FUNCTIONS OF EACH PART ------------------------------- 7 MAIN PARTS COMPONENT --------------------------------------------------- 20...
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).
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 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.
SPECIFICATIONS MODEL RAS-07CH1 RAC-07CHV1 RAS-09CH1 RAC-09CHV1 FAN MOTOR 20 W 20 W 20 W 20 W FAN MOTOR CAPACITOR 1.5 µF, 400 V 1.5 µF, 400 V FAN MOTOR PROTECTOR YES (INTERNAL) YES (INTERNAL) G333DB2Z G533QB9Z COMPRESSOR COMPRESSOR MOTOR CAPACITOR 30 µF, 400 V...
CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAS-07CH1, RAS-09CH1 Wireless remote controller Front cover Top Air suction grill Mounting Air suction grill plate Cabinet Discharge grill Horizontal air deflector Vertical air deflector Drain cap connection part (167.5) 167.5 About 340 About 430...
NAMES AND FUNCTIONS OF EACH PART COOLING UNIT RAS-07CH1, RAS-09CH1 AIR FILTER To prevent dust from coming into the indoor unit. (Refer page 17) POWER PLUG (NOT PROVIDED) SUCTION GRILL (AIR INLET). COOLING UNIT INDICATORS Light indicator showing the operating condition.
Page 9
OPERATION INDICATOR TEMPORARY SWITCH Temporary Switch about 7mm Press Non-conductor Stick Use this switch to start and stop when the remote controller does not work. [Use non-conductor stick (example toothpick)] RAS- 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.
Page 10
NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT I This controls the operation function and timer setting of the room air conditioner. The range of control is about 4 meters. If indoor lighting is controlled electronically, the range of control may be shorter.
Page 11
AUTOMATIC OPERATION I The device will automatically determine the operation mode either HEAT, COOL or DEHUMIDIFY, depending on the initial room temperature. Press the (START/STOP) button Operation start with a “beep”. STOP Press the (START/STOP) button Please make sure you have been selected the (Automatic) mode by use the (FUNCTION) Button.
Page 12
ENERGY SAVE DEHUMIDIFYING OPERATION I Use the device for dehumidifying when the room temperature is over 16°C. Press the (DEHUMIDIFY) button Operation start with a “beep” sound. Press the (START/STOP) button STOP When you want to change the operation mode, please use the (FUNCTION) Button.
Page 13
MANUAL OPERATION [Heating Dehumidify Cooling] I Please use under below condition when you want to set the function mode, room temperature and fan speed by manually. HEATING DEHUMIDIFYING COOLING Outdoor Temperature Room Temperature Outdoor Temperature 21°C below 16°C above 22-42°C OPERATION MODE SELECTION Every time you press the button, the mode will change as the below sequence...
Page 14
TIMER RESERVATION I ON Timer and OFF Timer are available. OFF Timer Reservation I Operation stop at setting time OFF TIME setting Select the OFF TIME by pressing the (OFF) Button. Setting time will change according to the below sequence when you press the button. 0.5 hour interval 1 hour interval 0 .
Page 15
ADJUSTING THE AIR DEFLECTOR Adjustment of the conditioned air in the upward and downward directions. According to “Dehumidifying” or “Cooling” operation, the horizontal air deflector is automatically set to the proper angle suitable for each operation. The deflector can be swung up and down and also set to the desired angle using the “...
Page 16
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 “sleep timer operation Caution mode”, together with your wake up time in the...
Page 17
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.
Page 18
MAINTENANCE CAUTION Before the cleaning, stop operation and disconnect 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. Further, noise may occur. Be sure to clean the filter following the procedure below.
Page 19
MAINTENANCE AT BEGINNING OF LONG OFF PERIOD 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 power plug. Blow REGULAR INSPECTION PLEASE CHECK THE FOLLOWING POINTS EVERY EITHER HALF YEARLY...
Page 20
AFTER SALE SERVICE AND WARRANTY WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS. CONDITION CHECK THE FOLLOWING POINTS Is the fuse all right? When it does not operate Is the voltage extremely high or low? Is the power switch “ON”? Is the air filter blocked with dust? When it does not cool well Does sunlight fall directly on the condensing unit?
MAIN PARTS COMPONENT THERMOSTAT Thermostat Specifications MODEL RAS-07CH1, RAS-09CH1 THERMOSTAT MODEL 17.6 (63.7) INDICATION 16.6 (61.8) TEMPERATURE 25.6 (78.1) INDICATION °C (°F) 24.6 (76.3) 33.6 (92.5) INDICATION 32.6 (90.7) FAN MOTOR Fan Motor Specifications MODEL RAS-07CH1 RAC-07CHV1 RAS-09CH1 RAC-09CHV1 PHASE –––––––...
Page 22
COMPRESSOR MOTOR Compressor Motor Specifications MODEL RAC-07CHV1 RAC-09CHV1 COMPRESSOR MODEL G333DB2Z G533QB9Z PHASE SINGLE SINGLE RATED VOLTAGE 220 – 240 V 220 – 240 V RATED FREQUENCY 50 Hz 50 Hz LOCKED ROTOR CURRENT 22 A 22 A POLE NUMBER WHITE ORANGE CONNECTION...
BASIC MODE Operation mode Cooling Sensor dehumidification Heating Automatic Control function Start/stop button, Start/stop button Operation and stop are repeated TEMPERATURE OF INDOOR HEAT basic mode operation lamp independent of timer reservations EXCHANGER THERMISTOR Start/stop button Reservation Cancel Operation lamp OFF timer Timer lamp Timer memory...
Page 31
Operation mode Cooling Sensor dehumidification Heating Automatic Control function "Strong" circulation "Strong" circulation • At the time of heating 15sec 30 sec 30 sec 30 sec 30 sec 30 sec 30 sec 30 sec 30 sec operation mode, the same Table 1 Specifications Other detailed specifications operation as for heating...
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 33
2. Reset Circuit Model RAS-07CH1, RAS-09CH1 35V 5V 5V 12V Q202 NORMAL RESET ZD201 – MICON Fig. 2-1 Reset Circuit DC35V Line DC35V Line DC5V Line DC5V Line Q201’S Base Q201’S Base Q201’S Base POWER ON POWER OFF POWER ON POWER OFF Q202’S Collector...
Page 34
3. Buzzer Circuit 4kHz Buzzer R801 (AX-3Q) Buzzer Fig. 3-1 When the buzzer is to be activated, buzzer output pin of the HIC alternates between ON and OFF repeatedly at 4kHz. And a 4kHz voltage is applied to the buzzer and the diaphragm of the buzzer vibrates to output 4kHz sound. 4.
Page 35
1. Reset Circuit Model RAC-07CHV1, RAC-09CHV1 MICON – Fig. 1-1 Reset Circuit DC35V Line DC35V Line DC5V Line DC5V Line Q701’S Base Q701’S Base Q701’S Base POWER ON POWER OFF POWER ON POWER OFF Q702’S Collector Q702’S Collector Q702’S Collector Fig.
Page 36
The reset circuit is used to reset the program to its initial settings when the power is turned on or when the power is recovered after a power failure. The micro computer is reset when the reset input is “Hi”, and reset operation is possible when the reset input is “Lo”. The waveforms at each point when the power is turned on and off are shown in the Fig.
AUTO SWING FUNCTION PRESENT CONDITION INPUT SIGNAL OPERATING SPECIFICATION REFERENCE OPERATION OPERATION MODE AIR DEFLECTOR ONE SWING (CLOSING AIR DEFLECTOR) INITIALIZE AT NEXT 1 DOWNWARD STOP OPERATION. STOP EACH MODE 2 UPWARD KEY INPUT DURING ONE SWING STOP AT THE MOMENT. START SWINGING AUTO COOL 1 DOWNWARD...
SERVICE CALL Q & A Cooling operation While cooling, the compres- Check whether frost sticks on If cooling is performed when sometimes stops the heat exchanger of indoor the room temperature is low, abruptly. unit or not. frost may stick on the heat Wait for 3-4 minutes until the exchanger of indoor unit.
Page 39
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 for 2-3 minutes.
Page 40
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 41
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 42
Wireless remote controller When the room temperature The room temperature is setting is “16”, pressing the settable within the range of room temperature control 16 - 32 and not beyond. button “ V ” causes no transmission. “32”, pressing “ ”...
Diagnosis Chart for Break-Down CRS-A22GW Which has problem? Indoor Unit or Outdoor Unit? Refer the manual “Inspection in timer-lamp Is the timer-lamp indoor unit blinking? on and off”. Set up Air-Cond mode (16°C) in cooling season, heater mode (32°C) in heating Detach the outer-cover and the cover of season and push start button.
Page 44
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 (2) Heat-barter thermistor is in –...
Page 45
INSPECTION OF INDOOR UNIT ELECTRICAL 1. Unable to put power on. (Nothing is working) Is AC100V between terminal Check outlet and breaker Is AC100V from an outlet? A and B? and repair. Check power wiring, power switch terminal and repair. Is DC35V between terminal Is AC100V between terminal Check indoor-outdoor connecting...
Page 46
2. Outdoor unit is not working (but can receive signal from the remote controller). Is voltage normal between pins 1 – 4 of the CN6 (Test-pin)? ❈CN6 pin 3 has DC12V. Take care in handling of tester pin to avoid any short-circuit with other pins when checking. Check indoor thermistor, if it Indoor - Thermistor Voltage between...
Page 47
3. Only indoor fan is not working (others are normal). Is there DC5V between CN10 Is there DC20V (about) between Exchange indoor fan motor. CN10 1 (blue-color) and 1 (blue-color) and CN10 3 CN10 5 (red-color) under the (yellow color)? air-cond mode/high level wind? Exchange REG3 after con- firming there is no short circuit...
Page 48
6. All operations suspended after a few second ~ a few minutes running (including all indications). Start operation in cooling mode with strong wind. Once operation lamp on and lighting off after 5 ~ 10 second later. Start cooling operation again after taking out CN10. Check any short-circuit board Once operation lamp on and lighting off after 5 ~ 10 pattern.
Page 49
[No working Not working correctly) 100V through terminal A In case 3A fuse is melted and cut off, observe any break down in other parts. 3A fuse, thermo-fuse is (Mostly Barista 2, Diode normal? stuck, Balance capacitor, etc) Exchange break-down parts. Is electric circuit normal? Confirm 35V, 12V, 5V by tester...
Page 50
LD202 blinking 9 times. Output DC35V from C.D. Any parts getting loose or Connecting tight. terminal. out of place in connecting Communication error (Normal output = DC33~40V) parts? Detach CN10 from control circuit board and is there the output DC35V between CN10 posts? Exchange SW power circuit board.
Page 51
Thermistor is disconnected. LD202 is blinking 7 times. Connect thermistor. ❈observe “left disconnection Thermistor unusual. after servicing”. Does thermistor works Exchange thermistor. correctly? Confirm circuit pattern and Does thermistor circuit Exchange thermistor circuit lead wiring following drawing works correctly? parts. board and circuit.
Page 52
1 2 3 1 2 3 1 2 3 The lightening mode of self-checking lamp. : Lighting : Blinking : OFF 1 2 3 The term of The matter Major check point self-checking (Contents) (red (red color) color) Normal operation or Main operation is on or off.
PARTS LIST AND DIAGRAM MODEL RAS-07CH1, RAS-09CH1 – 57 –...
Page 55
MODEL RAS-07CH1 PART N0. Q’TY / UNIT PARTS NAME RAS-07CH1 PMRAS-202B CABINET PMRAS-07C1 LOW-COVER PMRAS-07CH1 20W MOTOR PMRAS-09C1 TANGENTIAL FLOW FAN PMRAS-05C P-BEA ASSEMBLY PMRAS-05C BEARING COVER PMRAS-05C FAN MOTOR SUPPORT PMRAS-05C ELECTRICAL COVER PMRAS-05C DRAIN PAN ASSEMBLY PMRAS-252B DRAIN HOSE...
Page 56
PART N0. Q’TY / UNIT PARTS NAME RAS-07CH1 PMRAS-05C THERMISTOR (HEAT EXCHANGE) PMRAS-07CH1 ZENER DIODE (RD 5.1UJN2) PMRAS-07CH1 THERMAL FUSE (96°C) PMRAS-05C LED (ORANGE) PMRAS-05C LED (YELLOW) PMRAS-05C LIGHT RECEIVING UNIT PMRAS-10ADF REGULATOR (MC7805CT) PMRAS-13C1K DIODE (HSM2838CTR) PMRAS-05C TEMPORARY SWITCH...
Page 57
MODEL RAS-09CH1 PART N0. Q’TY / UNIT PARTS NAME RAS-09CH1 PMRAS-202B CABINET PMRAS-07C1 LOW-COVER PMRAS-07CH1 20W MOTOR PMRAS-09C1 TANGENTIAL FLOW FAN PMRAS-05C P-BEA ASSEMBLY PMRAS-05C BEARING COVER PMRAS-05C FAN MOTOR SUPPORT PMRAS-05C ELECTRICAL COVER PMRAS-05C DRAIN PAN ASSEMBLY PMRAS-252B DRAIN HOSE PMRAS-07CH1 FRONT COVER ASS'Y PMRAS-05C...
Page 58
PART N0. Q’TY / UNIT PARTS NAME RAS-09CH1 PMRAS-05C THERMISTOR (HEAT EXCHANGE) PMRAS-07CH1 ZENER DIODE (RD 5.1UJN2) PMRAS-07CH1 THERMAL FUSE (96°C) PMRAS-05C LED (ORANGE) PMRAS-05C LED (YELLOW) PMRAS-05C LIGHT RECEIVING UNIT PMRAS-10ADF REGULATOR (MC7805CT) PMRAS-13C1K DIODE (HSM2838CTR) PMRAS-05C TEMPORARY SWITCH PMRAS-07CH1 REGULATOR (IR3MO3AN) R-927CXV...
Page 60
MODEL RAC-07CHV1 PART N0. Q’TY / UNIT PARTS NAME RAC-07CHV1 RAC-1816S OVERHEAT RELAY RA-226 O.L.R. COVER RA-226 COVER SUPPORT PMRAC-05CV FAN MOTOR SUPPORT PMRAC-07CHV1 20W MOTOR PMRAC-05CV PROPELLER FAN PMRAC-05CV CABINET PMRAC-05CV ELECTRICAL COVER ASSEMBLY PMRAC-05CV SIDE PLATE (R) PMRAC-05CV SIDE PLATE (L) PMRAC-05CV HANDLE...
Page 61
PART N0. Q’TY / UNIT PARTS NAME RAC-07CHV1 R-326JIK TRANSISTOR (2SC458) PMRAC-07CHV1 EEPROM PMRAC-07CHV1 TRANSISTOR (2SD2019) PMRAC-07CHV1 CAPACITOR (1.5µF, 400V) PMRA-10ADF FAN RELAY RAC-2566THV SURGE ABSORBER RAC-289DX2 DIODE (D601) RAC-505BHM3 SPARK KILLER (SKI) RAS-2216W1 FUSE HOLDER RAS-2236W CAPACITOR (0.047µF, 25V) RAS-2568W DIODE (D3SB60Z) RAS-2568W...
Page 62
MODEL RAC-09CHV1 PART N0. Q’TY / UNIT PARTS NAME RAC-09CHV1 RAC-1816S OVERHEAT RELAY RA-226 O.L.R. COVER RA-226 COVER SUPPORT PMRAC-05CV FAN MOTOR SUPPORT PMRAC-07CHV1 20W MOTOR PMRAC-05CV PROPELLER FAN PMRAC-05CV CABINET PMRAC-05CV ELECTRICAL COVER ASSEMBLY PMRAC-05CV SIDE PLATE (R) PMRAC-05CV SIDE PLATE (L) PMRAC-05CV HANDLE...
Page 63
PART N0. Q’TY / UNIT PARTS NAME RAC-09CHV1 R-326JIK TRANSISTOR (2SC458) PMRAC-07CHV1 EEPROM PMRAC-07CHV1 TRANSISTOR (2SD2019) PMRAC-07CHV1 CAPACITOR (1.5µF, 400V) PMRA-10ADF FAN RELAY RAC-2566THV SURGE ABSORBER RAC-289DX2 DIODE (D601) RAC-505BHM3 SPARK KILLER (SKI) RAS-2216W1 FUSE HOLDER RAS-2236W CAPACITOR (0.047µF, 25V) RAS-2568W DIODE (D3SB60Z) RAS-2568W...