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SERVICE MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
RAK-15QPD
RAK-35RPD
RAK-18RPD
RAK-42RPD
RAK-25RPD
RAK-50RPD
This manual describes only points that differ from
RAM-33NP2B（PM NO.0581E）
RAM-40NP2B（PM NO.0582E）
RAM-53NP2B,RAM-53NP3B（PM NO.0583E）
RAM-68NP3B
（PM NO.0584E）
RAM-70NP4B
（PM NO.0585E）
RAM-90NP5B
（PM NO.0586E）
RAM-110NP6B
（PM NO.0587E）
RAC-18WPD,RAC-25WPD,RAC-35WPD,RAC-42WPD,RAC-50WPD（JCH-WH NO.0109E）
for items not described in this manual.
Indoor unit
Single outdoor unit
RAM-33NP2B
RAM-40NP2B
RAM-53NP2B
RAM-53NP3B
Multi
outdoor unit
RAM-68NP3B
RAM-70NP4B
RAM-90NP5B
RAM-110NP6B
SPECIFICATIONS
TYPE
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT
MODEL
RAK-18RPD RAC-18W
1 PHASE,50Hz,220-230V
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
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.
INDOOR UNIT
RAR-6N1
RAK-15QPD
RAK-18RPD
-
RAC-18WPD
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
OUTDOOR UNIT I I NDOOR UNIT OUTDOOR UNIT
PD
RAK-25RPD
RAC-25WPD
1 PHASE,50Hz,220-230V
419 (250
1,010)
549 (250
1,290)
2.46-2.35
3.08-2.95
2.00 (0.90 2.5)
2.50 (0.90 3.10)
6,820 (3,070
8,530)
8,530 (3,070
519 (250 970)
733 (250 1500)
2.93-2.81
3.87-3.71
2.50 (0.90 3.20)
3.40 (0.90 4.40)
8,530 (3,070
10,920)
11,600 (3,070 15,010)
780
750(+65)
780
548
280
280
230
288(+27.5)
230
288(+27.5)
8.5
32.5
8.5
ROOM AIR CONDITIONER
INDOOR UNIT
JCH-WH NO.0108E
RAK-15QPD
RAK-18RPD
RAK-25RPD
REFER TO THE FOUNDATION MANUAL
SPECIFICATIONS ------------------------------------------------------------------- 6
HOW TO USE ---------------------------------------------------------------------- 9
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 29
MAIN PARTS COMPONENT --------------------------------------------------- 30
WIRING DIAGRAM ---------------------------------------------------------------- 31
CIRCUIT DIAGRAM --------------------------------------------------------------- 33
BLOCK DIAGRAM ----------------------------------------------------------------- 35
BASIC MODE ----------------------------------------------------------------------- 36
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 48
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY-------------
DESCRIPTION OF MAIN CIRCUIT OPERATION ----------------------- 51
VARIOUS SETTINGS -----------------------------------------------------------------
PARTS LIST AND DIAGRAM -------------------------------------------------- 91
RAK-25RPD
RAK-35RPD
RAC-25WPD
RAC-35WPD
o
o
o
o
o
o
o
o
DC INVERTER
RAK-35RPD
RAC-35WPD
1 PHASE,50Hz,220-230V
941 (250 1,460)
4.81-4.60
3.50 (0.90 4.00)
10,580)
11,940 (3,070 13,650)
1,000 (250 1,700)
5.11-4.89
4.20 (0.90 5.00)
14,330 (3,070 17,060)
750(+65)
780
750(+65)
548
548
280
230
288(+27.5)
32.5
8.5
32.5
1
RAK-35RPD
RAK-42RPD
RAK-50RPD
CONTENTS
RAK-42RPD
RAK-50RPD
RAC-42WPD
RAC-50WPD
o
-
o
-
o
o
o
o
o
o
o
o
o
o
o
o
I I NDOOR UNIT OUTDOOR UNIT
I I NDOOR UNIT OUTDOOR UNIT
RAK-42RPD
RAC-42WPD
RAK-50RPD
1 PHASE,50Hz,220-230V
1 PHASE,50Hz,220-230V
1,120 (300 1,700)
1,471 (300 2,100)
5.10-4.88
6.69-6.40
4.20 (1.70 5.00)
5.00 (1.90 5.20)
14,330 (5,800 17,060)
17,060 (6,480 17,740)
1,317 (500 2,100)
1,558 (500 2,750)
5.99-5.73
7.09-6.78
5.40 (1.70 6.00)
6.00 (2.20 7.30)
18,430 (5,800 20,470)
20,470 (7,510 24,910)
780
792(+85)
780
600
280
280
230
299(+47)
230
8.5
39
8.5
After installation
49
63
73
-
-
o
o
o
o
o
o
RAC-50W
PD
792(+85)
600
299(+47)
39
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Related Manuals for Hitachi RAK-15QPD
Summary of Contents for Hitachi RAK-15QPD
-
Page 1: Table Of Contents
750(+65) 750(+65) 750(+65) 792(+85) 792(+85) DIMENSIONS (mm) 288(+27.5) 288(+27.5) 288(+27.5) 299(+47) 299(+47) 32.5 32.5 32.5 NET WEIGHT After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT Johnson Controls-Hitachi Air Conditioning 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 breaker 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-15QPD,RAK-18RPD,RAK-25RPD MODEL RAK-35RPD,RAK-42RPD,RAK-50RPD 30W (DC325 V) FAN MOTOR FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR – COMPRESSOR COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR OVERHEAT PROTECTOR FUSE (for MICROPROCESSOR) 3.15A POWER RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH TRANSFORMER TVR10471 VARISTOR NOISE SUPPRESSOR... - Page 7 Figure showing the installation of lndoor unit MODEL RAK-15QPD RAK-18RPD RAK-25RPD RAK-35RPD RAK-42RPD RAK-50RPD above 50mm above 50mm above 50mm Be sure to completely seal any gap with putty. 2300 mm or more Plug The indoor piping should be insulated with the enclosed insulation pipe.
- Page 8 Main PCB. SWITCH POSITION CAPACITY SELECTION 1.0kW 1.5kW 1.0kW 1.0kW 1.5kW 1.5kW NOTE: FACTORY default setting is at 1.5kW capacity. This setting is applicable for RAK-15QPD only.
- Page 23 ADJUSTING THE AIR DEFLECTORS To start Vertical Auto Swing Press (AUTO SWING (VERTICAL)) button. The deflector(s) will start to swing up and down. is displayed on the LCD. To cancel Vertical Auto Swing Press (AUTO SWING (VERTICAL)) button again. The deflector(s) will stop in the current position.
-
Page 29: Construction And Dimensional Diagram
CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAK-15QPD,RAK-18RPD,RAK-25RPD,RAK-35RPD,RAK-42RPD,RAK-50RPD INDOOR UNIT 19 .3 (RK-15QPD、RAK-18/25/35RPD) Wide pipe ( 12.7) (RAK-42/50RPD) 450mm 445mm 220mm 15mm More than More than 123mm 123mm 50mm 50mm 32.5mm 22mm 60mm 65mm 80mm 440mm 85mm 534mm 780mm Service space... -
Page 30: Main Parts Component
MAIN PARTS COMPONENT THERMOSTAT (Room temperature Thermistor) Thermostat Specifications RAK-15QPD,RAK-18/25/35/42/50RPD 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 31: Wiring Diagram
WIRING DIAGRAM RAK-15QPD,RAK-18RPD,RAK-25RPD,RAK-35RPD,RAK-42RPD,RAK-50RPD... - Page 32 WIRING DIAGRAM OF THE PRINTED WIRING BOARD [Remote controller] RAR-6 N1 SWB~SW10 Carbon SW RAR-6 N1 Reset carbon SW Only for RAR-5E2...
-
Page 33: Circuit Diagram
CIRCUIT DIAGRAM MODEL RAK-15QPD... - Page 34 CIRCUIT DIAGRAM MODEL RAK-18/25/35/42/50RPD...
-
Page 35: Block Diagram
BLOCK DIAGRAM MODEL RAK-15QPD,RAK-18RPD,RAK-25RPD,RAK-35RPD,RAK-42RPD,RAK-50RPD INDOOR UNIT Outdoor unit Indoor / Outdoor interface circuit DC fan motor Indoor DC fan motor drive circuit Control Power circuit Reset circuit Operation Indicating lamp Timer Eco sensor Buzzer circuit Wireless receive Wireless remote /send circuit... -
Page 36: Basic Mode
MODEL RAK-15QPD,RAK-18RPD,RAK-25RPD,RAK-35RPD,RAK-42RPD,RAK-50RPD... - Page 37 For the multi indoor unit RAK-15QPD RAK-15QPD MODEL RAK-18RPD RAK-25RPD RAK-35RPD RAK-42RPD RAK-50RPD (1.0KW) (1.5KW) REQUIRED REQUIRED REQUIRED REQUIRED REQUIRED REQUIRED REQUIRED PROM NO. LABEL NAME VALUE OF UNIT VALUE OF UNIT VALUE OF UNIT VALUE OF UNIT VALUE OF UNIT...
- Page 38 For the single indoor unit Table 1 Mode data file MODEL RAK-18RPD RAK-25RPD RAK-35RPD RAK-42RPD RAK-50RPD LABEL NAME VALUE WMAX 4800 min 5800 min 6600 min 5400 min 5800 min WMAX2 4800 min 5800 min 6600 min 5400 min 5800 min WSTD 3100 min 4200 min...
- Page 39 Notes: (1) Condition for entering into Cool Dashed mode. When fan set to “Hi” or “Auto and when the compressor speed (P section) due to temperature difference between setting temperature (including the correction shift only) and room temperature is CMAX or higher. (2) Cool Dashed will release when i) a maximum 25 minutes is lapsed and ii) room temperature is lower than set temperature –3°C (thermo off) and iii) when room temperature has achieved setting temperature –1°C then maximum Cool Dashed time will be revised to 20 minutes.
- Page 40 (1) Pressing the "POWERFUL" button will reduce the temperature setting by PWSFTC. (2) The powerful operation is for 20 minutes after setting. (3) Operation is continued forcibly thermo-ON for 20 minutes after the powerful operation is finished. (4) Pressing the "START/STOP" button and "POWERFUL"button during powerful operation wil cancel the powerful operation.
- Page 41 Notes: (1) If the room temperature is (cooling preset temperature) - (1.33°C) or less after 30 seconds from starting the operation, the operation is done assuming as the preset temperature = (room temperature at the time) - (2°C). (2) The indoor fan is operated in the “Lo” mode. During thermo OFF indoor fan will be OFF for 5 minutes and ON for 1 minute. (3) When the operation is started by the themostat turning ON, the start of the indoor fan is delayed 32 seconds after the start of compressor operation.
- Page 42 (1) Pressing the "POWERFUL" button will reduce the temperature setting by PWSFTSD. (2) The powerful operation is for 20 minutes after setting. (3) Operation is continued forcibly thermo-ON for 20 minutes after the powerful operation is finished. (4) Pressing the "START/STOP" button and "POWERFUL"button during powerful operation wil cancel the powerful operation. (5) If the sleep timer is set during powerful operation, the powerful operation will be canceled.
- Page 43 Notes: (1) Condition for entering into hot dashed mode. When fan set to "Hi" or "Auto" and i) room temperature is 18 or less, and ii) outdoor temperature is 10 or less, and iii) compressor speed (P section) due to temperature difference between setting temperature(including shift value only) and room temperature is WMAX or more.
- Page 44 SILENT Silent button Indoor WSZMAX/CSZMAX Compresson speed Outdoor Notes: Can’t set POWERFUL and SILENT at the same time. Setting Defrosting Inhibit Period DFTIM_OT P5 DFTIM_OTP 10 DFTIM_OT P0 Outdoor temperature – 1 0 – 5˚C ˚C Notes: The first inhibit time after operation start is set to DFTIM_FST. From the second time onwards, the inhibit time is set according to the time required for defrosting.
- Page 45 Same as Basic Heating operation (1) Pressing the "POWERFUL" button will increase the temperature setting by PWSFTW. (2) The powerful operation is for 20 minutes after setting. (3) Operation is continued forcibly thermo-ON for 20 minutes after the powerful operation is finished. (4) Defrost is inhibited for 20 minutes after the start of the powerful operation.
- Page 46 ECO button Cooling:0.66 Dehumidifying:0.66 Set temperature Heating:0.66 FCLN_WAM_P FCLN_SDF_P Current restrict Compressor speed CLNCMP Notes: Can’t set POWERFUL and ECO at the same time. During FAN operation,can’t set ECO.
- Page 47 Reversing valve defrosting 15' or more Auto fresh defrosting Over defrosting inhibit period Fan speed Stop set to "Hi" Start/Stop button Defrost signal Preheating released Preheating released Preheating judgment Preheating Indoor fan Ultra-Lo Hi or Lo Outdoor fan Hi or Lo Operation lamp Reversing valve Reverse cycle period...
-
Page 48: Refrigerating Cycle Diagram
MODEL RAK-15QPD,RAK-18RPD,RAK-25RPD,RAK-35RPD,RAK-42RPD,RAK-50RPD INDOOR UNIT OUTDOOR UNIT (1/2") (RAK-42/50RPD) (RAK-15QPD) Outdoor unit (RAK-18/25/35RPD) INDOOR UNIT OUTDOOR UNIT (1/2") (RAK-42/50RPD) (RAK-15QPD) Outdoor unit (RAK-18/25/35RPD) -
Page 49: Procedure For Disassembly And Reassembly
Procedure for Disassembly and Reassembly INDOOR UNIT RAK-15QPD,RAK-18/25/35/42/50RPD 1. Front Panel 3. Control P .W.B. and Indicating P.W.B. Be sure to hold the front panel with both hands to (1)Remove each connector from the lead wire. detach and attach it. - Page 50 (3)Pull fan motor out of the remove the right. Points for attention of fan motor and tangential air flow fan installation. When installing the flow fan,the first part of the fan and water seal plate on the tube plate overlap, then tighten the screw.
-
Page 51: Description Of Main Circuit Operation
DESCRIPTION OF MAIN CIRCUIT OPERATION RAK-15QPD,RAK-18RPD,RAK-25RPD,RAK-35RPD,RAK-42RPD,RAK-50RPD 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. It is then supplied to indoor fan motor drive circuit,and switching power circuit. - Page 52 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 53 3. Drive circuit of the indoor fan motor Fig. 3-1 < The circuit check (For test) > < Pin 6 - Pin 4 voltage one example > Name Test point Test voltage 1300min - Motor drive power About 325V CN2 1 pin- 4 pin About 15V Motor contorl power CN2 5 pin- 4 pin...
- Page 54 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 While the product is energized, do not under any circumstances detach or reattach a connector. Any such practice would cause a high voltage to run, resulting in the indoor fan motor and board circuit being destroyed.
- Page 55 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 56 7. Temporary Switch Circuit MICROCOMPUTER Temporary switch R405 TEMPORARY SW SW211 Fig. 7-1 The temporary switch is used to operate the air conditioner temporarily when the wireless remote control is lost or faulty. The air conditioner operates in the previous mode at the previously set temperature. However, when the power switch is set to OFF, it starts automatic operation.
- Page 57 DSW1...
- Page 58 11. Indoor/outdoor communication circuits Indoor unit side Outdoor unit side Inverter circuit Outdoor C302 microcomputer Indoor transmission circuit Indoor microcomputer 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 Fig.
- Page 59 12. Stepping motor drive circuit Microcomputer Vertical vane, left Vertical vane, left Vertical vane, left Vertical vane, left Horizontal sweep motor Lateral vane Lateral vane Lateral vane Lateral vane Vertical sweep motor 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...
- Page 60 13. Infrared human presence sensor circuit Sensor P.W.B Indoor main P.W,B Microcomputer Infrared sensor Fig.13 1 ・ With the infrared sensor,the air conditioner can detect the activity level in a room and adjust the temperature and humidity automatically,thus achieving the purpose of energy saving. ・...
- Page 61 RL1 RL2...
- Page 62 Load side is a high voltage line, please be careful from electric shock and install the Indica•on Lamp as near as possible to the Relay Kit. The maximum length of the wiring cable should be below 100m.
-
Page 63: Service Call Q&A
SERVICE CALL Q&A RAK-15QPD,RAK-18RPD,RAK-25RPD,RAK-42RPD,RAK-50RPD MODEL 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 64 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, to weak fan speed to slight fan speed. speed prevention is working.
- Page 65 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 66 STRUCTURE OF AN INDOOR UNIT ELECTRIC PARTS RAK-15QPD,RAK-18RPD,RAK-25RPD,RAK-35RPD,RAK-42RPD,RAK-50RPD FIXTURE SCREW ELECTRICAL. COVER FIXTURE SCREW FIXTURE SCREW Removing electrical parts 1. Remove the electrical parts cover. 2. Remove the connectors from the CN4 (heat exchange thermistor), CN9,CN15 (stepping motor) ,CN2 (fan motor) and CN21 (Eco sensor) .
- Page 67 Other instructions 1 Detaching and reattaching the receptacles for tab terminal All the receptacles for connecting tab terminals are with a locking mechanism. orcibly 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 68 Troubleshooting support unction 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 69 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 71 Indoor interface circuit broken 1. Indoor interface circuit (sigle only) Outdoor interface circuit broken 1. Outdoor interface circuit (sigle only) and outdoor units ECO sensor unit defective Short- circuit ECO sensor circuit...
- Page 72 Forced cooling operation (Only single connection) 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 73 37 and page 38...
- Page 74 RAR-6N1, RAR-6N2, RAR-6N3, RAR-6N4, RAR-6N5 ) Please set the DIP switch No.6 to ON accordingly (Refe to page...
- Page 77 tK d Kd tE'/ d t dD' Z&D ' d>E'd K' ZK^d WZK h,Z ^d Zd ^dKW Z ^ d Z ^ d < < ^d Zd ^dKW >/ > ZKKD d DW Z dFZ BKGH HKd C...
- Page 78 tK d Kd tE'/ d t d>E'd W hdD'd KK^D'/d&Kh dh,ZD'/d t Z&KdK>> WZK h,Z WKG Z?FK HKd C E / d...
- Page 79 Diagnosis and troubleshooting of indoor electric parts 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 80 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 81 1. Failure phenomenon: The power will not become turned on. Neither initialization, remote control, nor any other step works on the vane position at power-on. Situation Estimated cause of fuse blowout ・ Abnormally high voltage applied to the power supply [ Estimated failure ・...
- Page 82 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 83 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 84 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 85 3. Failure phenomenon: The compressor will not run. [ Situation ] The compressor will not run (the same state as the thermometer turned off), the product receives remote control signals normally. The self-diagnosis lamp (LD301) of the outdoor unit blinks once or becomes turned off. [ Estimated failure locations ] ・Room temperature thermistor, heat exchanger thermistor Microcomputer peripheral circuit ・...
- Page 86 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.) Estimated failure locations ・Indoor fan motor ・Fan motor drive circuit Diagnosis flow Initiating troubleshooting...
- Page 87 5. Timer lamp blinking: blinking once [Situation] The timer lamp blinks one time and the product will not operate. (This is not a sign of a breakdown.) [Estimated failure locations] ・ Reversing valve defective. ・ The refrigerating cycle block gas leak. 6.
- Page 88 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 89 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]...
- Page 90 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 CN27of 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 91: Parts List And Diagram
PARTS LIST AND DIAGRAM INDOOR UNIT MODEL: RAK-15QPD、RAK-18RPD、RAK-25RPD RAK-35RPD、RAK-42RPD、RAK-50RPD Accessory Part SPX-CFH25... - Page 92 INDOOR UNIT JCH-WH PARTS NO Q'TY/UNIT PARTS NAME HWRAK-18RPD CABINET ASS'Y HWRAK-18RPD STEPPING MOTOR HWRAS-K10HCG 903 FAN MOTOR HWRAK-18PSPA 902 TANGENTIAL AIR FLOW FAN HWRAK-18PED FAN SUPPORT ASS'Y HWRAK-18PED FAN MOTOR SUPPORT-R HWRAK-18RPD FAN MOTOR SUPPORT-L HWRAK-18RPD EVAPORATOR ASS'Y HWRAK-50RPD EVAPORATOR ASS'Y HWRAK-18RPD PIPING ASS'Y...
- Page 93 JCH-WH NO.0108E RAK-15QPD RAK-18RP RAK-25RP RAK-35RP RAK-42RP RAK- RPD...