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SERVICE MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
RAC-18WEC
RAC-25WEC
RAC-35WEC
RAC-10WECI
RAC-14WECI
RAC-50WEC
RAC-20WECI
TYPE
MODEL
POWER SOURCE
TOTAL INPUT (W
TOTAL AMPERES (A)
COOLING
(KW)
CAPACITY
(B.T.U./h)
TOTAL INPUT (W
TOTAL AMPERES (A)
HEATING
(KW)
CAPACITY
(B.T.U./h)
W
DIMENSIONS
H
(mm)
D
NET WEIGHT
(Kg)
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
Hitachi Household Appliances(Wuhu) Co., Ltd.
RAK-18PEC
RAK-25PEC
RAK-35PEC
RAK-50PEC
RAK-25PECC
RAK-35PECC
RAK-50PECC
RAK-10PECI
RAK-14PECI
RAK-20PECI
L.H
INDOOR UNIT
INDOOR UNIT
RAK-25PEC
RAK-25PECC
RAK-18PEC
RAC-18WEC
RAK-10PECI
1 PHASE,50Hz ,220-230V
580 (
250
1,010)
3.19-3.05
2.00 (0.90 2.50)
6,820 (3,070 8,530)
620 (250 970)
3.62-3.46
2.50 (0.90 3.20)
8,530 (3,070 10,920)
780
660(+60)
280
530
218
278(+55)
7.5
24.5
INDOOR UNIT + OUTDOOR UNIT
HHAW
RAK-18PEC/RAC-18WEC
RAK-25PEC/RAC-25WEC
RAK-35PEC/RAC-35WEC
RAK-50PEC/RAC-50WEC
RAK-25PECC/RAC-25WEC
RAK-35PECC/RAC-35WEC
RAK-50PECC/RAC-50WEC
RAK-10PECI/RAC-10WECI
RAK-14PECI/RAC-14WECI
RAK-20PECI/RAC-20WECI
REFER TO THE FOUNDATION MANUAL
SPECIFICATIONS ------------------------------------------------------------------- 6
HOW TO USE ----------------------------------------------------------------------- 9
Construction And Dimensional Diagram --------------------- 18
Main Parts Component --------------------------------------------------- 21
Wiring Diagram ---------------------------------------------------------------- 23
Circuit Diagram --------------------------------------------------------------- 25
Block Diagram ----------------------------------------------------------------- 28
Basic Mode ----------------------------------------------------------------------- 29
Refrigerating Cycle Diagram --------------------------------------- 39
Procedure For Disassembly And Reassembly------------- 42
Description Of Main Circuit Operation ----------------------- 45
SERVICE CALL Q & A ---------------------------------------------------------- 70
Trouble Shooting ----------------------------------------------------------- 73
Parts List And Diagram --------------------------------------------------105
DC INVERTER
OUTDOOR UNIT
INDOOR UNIT
RAK-35PEC
RAC-25WEC
RAK-35PECC
RAC-10WECI
RAK-14PECI
1 PHASE,50Hz ,220-230V
1 PHASE,50Hz ,220-230V
700 (250 1,290)
1,090 (250 1,460)
3.84-3.67
2.50 (0.90 3.10)
3.50 (0.90 4.00)
8,530 (3,070 10,580)
11,940 (3,070 13,650)
880 (250 1,250)
1,100 (250 1,700)
4.56-4.36
3.40 (0.90 4.40)
4.20 (0.90 5.00)
11,600 (3,070 15,010)
14,330 (3,070 17,060)
780
660(+60)
780
280
530
280
218
278(+55)
218
7.5
24.5
7.5
NO. 0093E
CONTENTS
OUTDOOR UNIT
INDOOR UNIT
OUTDOOR UNIT
RAK-50PEC
RAC-35WEC
RAK-50PECC
RAC-14WECI
RAK-20PECI
1 PHASE,50Hz , 220-230V
1,560 (500 2,100)
5.41-5.18
7.29-6.85
5.00 (1.90 5.20)
17,060 (6,480 17,740)
1,660 (500 2,750)
5.36-5.13
7.56-7.23
6.00 (2.20 7.30)
20,470 (7,510 24,910)
660(+60)
780
530
280
278(+55)
218
27.5
8
After installation
RAC-50WEC
RAC-20WECI
792(+91)
600
299(+47)
40
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Table of Contents
Troubleshooting
Related Manuals for Hitachi RAC-18WEC
Summary of Contents for Hitachi RAC-18WEC
-
Page 1: Service Manual
660(+60) 660(+60) 660(+60) 792(+91) DIMENSIONS (mm) 278(+55) 278(+55) 278(+55) 299(+47) NET WEIGHT (Kg) 24.5 24.5 27.5 After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT + OUTDOOR UNIT Hitachi Household Appliances(Wuhu) Co., Ltd. - Page 2 6$)(7< '85,1* 5(3$,5 :25. ,Q RUGHU WR GLVDVVHPEOH DQG UHSDLU WKH XQLW LQ TXHVWLRQ EH VXUH WR GLVFRQQHFW WKH SRZHU FRUG SOXJ IURP WKH SRZHU RXWOHW EHIRUH VWDUWLQJ WKH ZRUN ,I LW LV QHFHVVDU\ WR UHSODFH DQ\ SDUWV WKH\ VKRXOG EH UHSODFHG ZLWK UHVSHFWLYH JHQXLQH SDUWV IRU WKH XQLW DQG WKH UHSODFHPHQW PXVW EH HIIHFWHG LQ FRUUHFW PDQQHU DFFRUGLQJ WR WKH LQVWUXFWLRQV LQ WKH 6HUYLFH 0DQXDO RI WKH XQLW ,I WKH FRQWDFWV RI HOHFWULFDO...
- 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 wire 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 or stop 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 recommend to stop the operation and turn off the circuit break er for safety. In the event of power failure,the room air conditioner will restare automatically in the previously selected mode once the power is restored.
-
Page 6: Specifications
SPECIFICATIONS RAK-18PEC RAK-25PEC MODEL RAK-35PEC RAK-50PEC RAC-18WEC RAK-25PECC RAC-35WEC RAC-50WEC RAK-35PECC RAC-25WEC RAC-14WECI RAC-20WECI RAK-50PECC RAC-10WECI RAK-10PECI RAK-14PECI RAK-20PECI FAN MOTOR 4 W (DC120~380V) 30W (DC325V) FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR – ASD084SFNA7JK1 ASG133CDNB7AT COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR... - Page 7 Figure showing the installation of lndoor and Outdoor unit MODEL RAK-18PEC/RAC-18WEC RAK-25PEC/RAC-25WEC RAK-35PEC/RAC-35WEC above RAK-25PECC/RAC-25WEC 50mm RAK-35PECC/RAC-35WEC RAK-10PECI/RAC-10WECI RAK-14PECI/RAC-14WECI above 50mm above 50mm Be sure to completely seal any gap with putty. 2,300 mm or more Plug (Procure locally) The indoor piping should be insulated with the enclosed insulation pipe.
- Page 8 Figure showing the installation of lndoor and Outdoor unit MODEL RAK-50PEC/RAC-50WEC RAK-20PECI/RAC-20WECI above 50mm above 50mm above 50mm Be sure to completely seal any gap with putty. 2,300 mm or more Plug (Procure locally) The indoor piping should be insulated with the enclosed insulation pipe.
-
Page 12: Adjusting The Airflow Direction
ADJUSTING THE AIRFLOW DIRECTION Adjust the airflow upward and downward. According to operation, the horizontal air deflector is automatically set to the proper angle suitable for each operation.The deflector can be swings up and down and also set to the desired angle using the “... -
Page 18: Construction And Dimensional Diagram
CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAK-18PEC,RAK-25PEC,RAK-35PEC,RAK-50PEC RAK-25PECC,RAK-35PECC,RAK-50PECC RAK-10PECI,RAK-14PECI,RAK-20PECI INDOOR UNIT 16.8 (RAK-18/25/35PEC、RAK-25/35PECC、RAK-10/14PECI) ( 12.7) (RAK-50PEC、RAK-50PECC、RAK-20PECI) More than More than 50mm 50mm 37.5 47.5 Service space... - Page 19 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAC-18WEC,RAC-25WEC,RAC-35WEC RAC-10WECI,RAC-14WECI OUTDOOR UNIT Air outlet Drain hole More than NOTE: 1.For outdoor unit installation , allow at least 2 sides of space around the unit ensure ventilation flue. 2.The connecting pipe , should all the insulated with insulation pipe.
- Page 20 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAC-50WEC,RAC-20WECI Unit : mm OUTDOOR UNIT More than NOTE: 1.For outdoor unit installation , allow at least 2 sides of space around the unit ensure ventilation flue. 2.The connecting pipe , should all the insulated with insulation pipe. 3.Piping length is within 20m.
-
Page 21: Main Parts Component
MAIN PARTS COMPONENT THERMOSTAT (Room temperature Thermistor) Thermostat Specifications RAK-18PEC,RAK-25PEC,RAK-35PEC,RAK-50PEC RAK-25PECC,RAK-35PECC,RAK-50PECC RAK-10PECI,RAK-14PECI,RAK-20PECI THERMOSTAT MODEL OPERATION MODE 15.3 (59.54) 16.7 (62.06) INDICATION 15.0 (59.00) 16.7 (62.06) 23.3 (73.94) 24.7 (76.46) TEMPERATURE INDICATION ˚C (˚F) 23.0 (73.40) 24.7 (76.46) 31.3 (88.34) 32.7 (90.86) INDICATION 31.0... - Page 22 COMPRESSOR MOTOR Compressor Motor Specifications RAC-18/25/35WEC RAC-50WEC MODEL RAC-10/14WECI RAC-20WECI COMPRESSOR TYPE ASD084SFNA7JK1 ASG133CDNB7AT POWER SOURCE 220 - 350 V 220 - 350 V OUTPUT 681W 1080W WHITE YELLOW YELLOW YELLOW WHITE WHITE COMPRESSOR RAC-18/25/35WEC RAC-50WEC RAC-10/14WECI RAC-20WECI CAUTION When the refrigerating cycle has been operated for a long time with the capillary tubes clogged or crushed or with too little refrigerant, check the color of the refrigerating machine oil inside the compressor.
- Page 30 Table 1 Mode data file RAK-25PEC RAK-35PEC RAK-50PEC MODEL RAK-18PEC RAK-25PECC RAK-35PECC RAK-50PECC RAK-10PECI RAK-14PECI RAK-20PECI LABEL NAME VALUE WMAX 4200 6200 6700 6000 WMAX2 4200 6200 6700 6000 WSTD 3100 4500 5700 4700 WJKMAX 2800 4200 5500 4100 WBEMAX 2800 3800 5000...
- Page 39 MODEL RAK-18/25PEC，RAK-25PECC，RAK-10PECI RAC-18/25WEC RAC-10WECI...
- Page 40 MODEL RAK-35PEC， RAK-35PECC， RAK-14PECI RAC-35WEC，RAC-14WECI...
- Page 41 MODEL RAK-50PEC， RAK-50PECC， RAK-20PECI RAC-50WEC RAC-20WECI １／２ １／２ １／２ １／２...
-
Page 42: Procedure For Disassembly And Reassembly
Procedure for Disassembly and Reassembly INDOOR UNIT RAK-18/25/35/50PEC RAK-25/35/50PECC RAK-10/14/20PECI 1. Front Panel 3. Control P .W.B. and Indicating Be sure to hold the front panel with both hands to P.W.B. detach and attach it. (1)Remove each connector from the lead wire. (2)Remove the four P.W.B. - Page 43 4. Tangential air flow fan and fan motor (5) Remove the electrical box fixing screws and GND wire fixing Press to lower the hook at the center of the unit a little and pull the screw. claw forward to remove the drain pan. Fig.
- Page 44 OUTDOOR UNIT MODEL RAC-50WE RAC-20WECI 1. Electrical parts (1)Remove the service value cover lock screws (6)Remove each connector and earth cable from and lower the cover to remove it. the lead wire. Then,remove the electrical box . (2)Remove the top cover lock screw and raise the cover to remove it.
-
Page 45: Description Of Main Circuit Operation
DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAK-18/25/35/50PEC RAK-25/35/50PECC RAK-10/14/20PECI 1. Control power circuit Switching power circuit Fig. 1-1 ・ An AC power supply from outdoor unit passes through the 3.15 A fuse, varistor (VA001), and noise filter circuit and rectified and smoothed by DB1 and C003 to become a DC current 325 V. - Page 46 2. Reset Circuit Reset R503 Microcomputer R502 IC501 Fig.2-1 Timing chart Voltage 5 . 0V pin of IC501 supply voltage RES detecting voltage RES canceling voltage 4 . 4V 4 . 2V Voltage pin of IC501 output voltage 5.0V pin of microcomputer Fig.2-2 Reset circuit is to initialize the indoor unit microcomputer when switching ON the power or after recovering from power failure.
- Page 47 3. Drive circuit of the indoor fan motor Primary 325V Primary 18.5V Indoor fan motor Power siganl of indoor fan(from pin 57 of microcomputer) Primary 0 V Rotation speed feedback signal (to pin of microcomputer) Output signal of indoor fan (to pin of microcomputer) Fig.
- Page 48 Caution The indoor fan motor and drive circuit are connected to the primary power supply. They therefore have voltage to ground. Guard against electric shocks. Caution ny circumstances detach or reattach a connector. Any such practice would cause a high voltage to r fan motor and board circuit being destroyed.
- Page 49 6. Initial Setting Circuit (IC531) When power is supplied, the microcomputer reads the data in IC531 (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 IC531; data will not be erased even when power is turned off. Fig.
- Page 50 DSW1 R695 R903 R741 R905 R740 R906 R642 DSW1...
- Page 51 11. Indoor/outdoor communication circuits Indoor unit side Outdoor unit side Inverter circuit Outdoor C302 microcomputer Indoor transmission circuit Indoor microcomputer (IC601) Outdoor Indoor/outdoor communication Outdoor reception chopper output (30kHz) reception circuit input Indoor transmission output Outdoor transmission circuit Outdoor transmission output Indoor reception input Indoor unit reception circuit...
- Page 52 12. Stepping motor drive circuit Fig. 12-1 [Connector circuit waveform while the motor runs] Voltage waveforms of different phases as viewed from the OV line while the motor rotor is turning counterclockwise as viewed from the shaft side 4 terminal 3 terminal 2 terminal 1 terminal...
- Page 53 MODEL RAC-18/25/35WEC RAC-10/14WECI 300-330 Main parts C021-C022,375 ,420V)
- Page 54 2. Power circuit (Low voltage) Fig. 2-1 The 230V AC voltage is rectified to DC voltage (B-12V,16V,12V,5V) pass through switching control IC (ICI), switching transformer. (1) B-12V Power supply for electrical expansion valve. (2) 16V Power supply for IPM driver circuit of compressor and fan motor, IGBT action. (3) 12V Power supply for 4 way valve relay, power relay, inrush current relay,motor current amplification, (4) 5V...
- Page 55 Main parts 001,C002,C003,C004,C005,C011,C013,C014，NF1 1,2,5,8. DC/DC convertor IC (DC12V DC5V). L105 (JUMPER) D110 (EARTH) L104 (JUMPER) 0.5V D110 (EARTH) L103 (JUMPER) 15.5 1.5V D110 (EARTH) 1.0V R120 B-12V Expansion valve B-12V O/P 2.5V R120 B-0V) 1.0V...
- Page 56 4.Reversing valve control circuit This model reversing valve control used to control the relay ON/OFF of the revesing valve, and also control the coil of the reversing valve ON/OFF. The relay ON/OFF has different type when in the different operation mode. You can see each operation mode as fllows.
- Page 57 HIC P.W.B 70 74 75...
- Page 58 6. Electric expansion valve circuit...
- Page 59 2A Fuse DC300 -330V...
- Page 60 ( DC300-330V )
- Page 61 MODEL RAC-50WEC RAC-20WECI 300-330...
- Page 62 C021-C023,500 ,450V) 33 ACT R249 IP CUT 300-330...
- Page 63 2. Power circuit (Low voltage) Fig. 2-1 The 230V AC voltage is rectified to DC voltage (B-12V,16V,12V,5V) pass through switching control IC (ICI), switching transformer. (1) B-12V Power supply for electrical expansion valve. (2) 16V Power supply for IPM driver circuit of compressor and fan motor, IGBT action. (3) 12V Power supply for 4 way valve relay, power relay, inrush current relay,motor current amplification, (4) 5V...
- Page 64 Main parts 001,C002,C003,C004,C005,C011,C013,C014，NF1 1,2,5,8. DC/DC convertor IC (DC12V DC5V). L105 (JUMPER) D110 (EARTH) L104 (JUMPER) 0.5V D110 (EARTH) L103 (JUMPER) 15.5 1.5V D110 (EARTH) 1.0V R418 B-12V Expansion valve B-12V O/P 2.5V 1 “ - ” 1.0V...
- Page 65 4.Reversing valve control circuit This model reversing valve control used to control the relay ON/OFF of the revesing valve, and also control the coil of the reversing valve ON/OFF. The relay ON/OFF has different type when in the different operation mode. You can see each operation mode as fllows.
- Page 66 HIC P.W.B 70 74 75...
- Page 67 6. Electric expansion valve circuit...
- Page 68 2A Fuse DC300 -330V...
- Page 69 ( DC300-330V )
-
Page 70: Service Call Q & A
SERVICE CALL Q&A 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 frost. of the indoor unit to gather Wait for 3 to 4 minutes frost. - Page 71 Common, etc. In fan speed "automatic" mode, In "automatic fan speed" mode, the This does not abnormal. It the product will sense the heat indoor fan changes from strong fan speed is because the cold fan exchange temperature and, speed prevention is working. to weak fan speed to slight fan speed.
-
Page 72: Wireless Remote Control
Wireless remote control The timer will not become set. Have you set the product to the current time? The timer cannot be set unless it is set to the current time. The current time When set to the current The current time display will disappears 10 seconds time setting, the reading disappear at once. -
Page 73: Trouble Shooting
TROUBLE SHOOTING MODEL RAC-18/25/35/50WEC RAC-10/14/20WECI Inspection instructions RAC-18/25/35WEC RAC-50WEC RAC-10/14WECI RAC-20WECI Indoor fan motor Indoor fan motor Power supply Power supply Indoor Electrical Outdoor Electrical Indoor Electrical Outdoor Electrical 1Φ 230V 50Hz 1Φ 230V 50Hz Compressor Compressor motor motor Warning 0V line 0V line Note that the 0 V line of the... - Page 74 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. During continuity check for each circuit part of the outdoor unit, be sure to discharge the smoothing capacitors.
- Page 75 STRUCTURE OF AN INDOOR UNIT ELECTRIC PARTS RAK-18/25/35/50PEC RAK-25/35/50PECC RAK-10/14/20PECI FIXTURE SCREW ELECTRICA L. COVER FIXTURE SCREW FIXTURE SCREW Removing electrical parts 1. Remove the electrical parts cover. 2. Remove the connectors from the CN4 (heat exchange thermistor), CN15 (stepping motor) and CN2 (fan motor). 3.
- Page 76 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 77 Troubleshooting support Function Self-diagnosis display ・The failure mode detected on the indoor unit side is displayed by [Display on the indoor blinking the "timer lamp". And a failure detected on the outdoor unit side] unit side will be indicated by the "time lamp" blinking 4 times. ・If the outdoor unit side detects a failure, the product will first conduct several operation retrials.
- Page 78 Self-diagnosis display function (indoor side display) While the "timer lamp" (orange), of the indoor unit is blinking, troubleshoot the product while referring to the table below. 1. How to count the lamp blinking frequency [An example of 5-time blinking] ・ The product will repeat blinking with 2-second 2-second 2-second intermissions.
- Page 80 SELF-DIAGNOSIS LIGHTING MODE MODEL RAC-50WEC RAC-20WECI...
-
Page 81: Forced Cooling Operation
Forced cooling operation The cooling operation can be forcibly performed for collecting refrigerant and inspecting failures. Do not perform the forced cooling operation continuously for long hours, because the compressor continues to be in operational status, regardless of room temperature. ＜How to start the operation＞... - Page 82 Diagnosis and troubleshooting of indoor electric parts, outdoor electric parts and refrigerating cycle Initiating troubleshooting Are the "timer lamp" (orange) of the indoor unit Perform troubleshooting according to the blinking? self-diagnosis display. The product will begin to run in response to a remote control setting: "cooling mode, temperature setting 16 "...
- Page 83 Checking the indoor unit electrical parts Introduction First check the failure phenomenon and status, and then move on to elaborate diagnosis. Initiating troubleshooting How many times does the time lamp Is the "timer lamp" (orange) of the indoor unit blinking? blinding not 4 times 4 times...
- Page 84 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 ・...
- Page 85 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 ・...
- Page 86 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 87 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 88 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 ・...
- Page 89 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 10 minutes later.) ・Indoor fan motor Estimated failure locations ・Fan motor drive circuit Diagnosis flow Initiating troubleshooting...
- Page 90 5. Timer lamp blinking: blinking once The timer lamp blinks one time and the product will not operate. [Situation] (This is not a sign of a breakdown.) [Estimated failure locations] ・ Reversing valve defective. ・ The refrigerating cycle block gas leak. 6.
- Page 91 9. 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. [Cautions] Starting the product by remote control will initiate failure detection. (Merely turning on the power will not activate the failure detection function.) [Diagnosis flow] Initiating troubleshooting...
- Page 92 10. 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 93 11. 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) Forget to connect CN27 of outdoor P.W.B Wire break or poor insertion of the indoor-outdoor connection line (F cable) Electrical parts in the outdoor unit (communication circuit, power circuit error) Communication error due to noise in other home electronics This does not constitute a failure in the air-conditioner...
- Page 94 Checking the electrical parts of the outdoor unit...
- Page 100 1.Remove rear cover as shown in figure Remove screws Remove screws Remove rear cover (3PC) (3PC) 2.Short the JSW1 or J1 ON PCB according to different supplier. For dis nguishing them, we a ached different type label in the ba ery case as below. RAR-5F1 RAR-5F1-1 JSW1...
- Page 101 Press and hold (OFF) button and (ON) button. Press [RESET] button on the same time. Release [RESET] button only, then release (OFF) (ON) button once Screen 1 appears. Screen 1 Screen 2 3. Press the button to display fan mode (Screen 3). Screen 3 Press the Temperature button ( ) to change the shift value.
- Page 102 (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 103 How to run the product with the outdoor unit test switch If the indoor electrical parts is out of order and if you wish to run the outdoor unit 1. Turn on the outdoor terminal boards L and N (220-230 V AC). 2.
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Page 104: How To Operate The Outdoor Unit Independently
Cautions 1. Applying power directly to the outdoor unit will cause a rush current to stress the outdoor unit. Therefore, if the indoor unit is not out of order, do not use the method descried in 2). 2. Before making the connections, be sure to turn off the breaker. 3. -
Page 105: Parts List And Diagram
PARTS LIST AND DIAGRAM INDOOR UNIT MODEL: RAK-18/25/35/50PEC RAK-25/35/50PECC RAK-10/14/20PECI... - Page 106 INDOOR UNIT MODEL: RAK-18/25/35/50PEC...
- Page 107 INDOOR UNIT MODEL: RAK-25/35/50PECC...
- Page 108 INDOOR UNIT MODEL: RAK-10/14/20PECI...
-
Page 109: Outdoor Unit
OUTDOOR UNIT MODEL RAC-18/25/35WEC RAC-10/14WECI (35WEC) (18/25WEC) 5(18/25WEC) (35WEC) 5(35WEC) (18/25WEC) 35WEC) 35WEC) (18/25WEC) (18/25WEC) - Page 110 OUTDOOR UNIT MODEL: R A C - 1 8 / 2 5 / 3 5 W E C R A C - 1 0 / 1 4 W E C I...
- Page 111 OUTDOOR UNIT MODEL RAC-50WEC RAC-20WECI...
- Page 112 OUTDOOR UNIT MODEL: R A C - 5 0 W E C R A C - 2 0 W E C I...
- Page 113 RAK-18PEC/RAC-18WEC HHAW NO. 0093E RAK-25PEC/RAC-25WEC RAK-35PEC/RAC-35WEC RAK-50PEC/RAC-50WEC RAK-25PECC/RAC-25WEC RAK-35PECC/RAC-35WEC RAK-50PECC/RAC-50WEC RAK-10PECI/RAC-10WECI RAK-14PECI/RAC-14WECI RAK-20PECI/RAC-20WECI...