Related Manuals for Toshiba RAS-24UKX
Summary of Contents for Toshiba RAS-24UKX
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Page 1: Service Manual
FILE NO. SVM-01010 SERVICE MANUAL AIR-CONDITIONER SPLIT WALL TYPE RAS-24UKX / RAS-24UAX RAS-24UK-AR / RAS-24UA-AR RAS-18UKX / RAS-18UAX RAS-18UK-AR / RAS-18UA-AR 18 Class 24 Class Dec., 2001... -
Page 2: Table Of Contents
FILE NO. SVM-01010 CONTENT 1. SPECIFICATIONS 2. CONSTRUCTION VIEWS 2-1 Indoor Unit (RAS-24UKX, RAS-24UK-AR) 2-2 Indoor Unit (RAS-18UKX, RAS-18UK-AR) 2-3 Outdoor Unit (RAS-24UAX, RAS-24UA-AR) 2-4 Outdoor Unit (RAS-18UAX, RAS-18UA-AR) 3. WIRING DIAGRAM 3-1 RAS-24UKX / RAS-24UAX RAS-24UK-AR / RAS-24UA-AR 3-2 RAS-18UKX / RAS-18UAX RAS-18UK-AR / RAS-18UA-AR 4. - Page 3 FILE NO. SVM-01010 8. INSTALLATION PROCEDURE 8-1 Safety Cautions 8-2 Installation Diagram of Indoor and Outdoor Units 8-3 Installation 8-4 Indoor Unit 8-5 Outdoor Unit 8-6 Others 9. TROUBLESHOOTING CHART 9-1 Troubleshooting Procedure 9-2 Basic Check Items 9-3 Primary Judgement 9-4 Self-Diagnosis by Remote Control (Check Code) 9-5 How to Diagnose Faulty Parts 9-6 Troubleshooting for Indoor Unit...
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Page 4: Specifications
FILE NO. SVM-01010 1. SPECIFICATIONS RAS-24UKX/24UAX RAS-24UK-AR/24UA-AR RAS-18UKX/18UAX RAS-18UK-AR/18UA-AR MODEL ITEM Cooling Cooling Cooling Cooling 220V 240V 220V 240V 220V 240V 220V 240V Capacity 6.40 6.45 6.40 6.45 5.20 5.25 5.20 5.25 Phase 1Ø Power source 220-240 Power consumption 2350... - Page 5 19 °C (DB) 35 °C Outdoor unit inlet air temperature (WB) 24 °C Note : 2 • Charge refrigerant according to the table below. RAS-24UKX/24UAX RAS-18UKX/18UAX Refrigerant RAS-24UK-AR/24UA-AR RAS-18UK-AR/18UA-AR No need to charge 15m or less 15m or less refrigerant...
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Page 6: Construction Views
FILE NO. SVM-01010 2. CONSTRUCTION VIEWS 2-1. Indoor Unit (RAS-24UKX, RAS-24UK-AR) Back body Front panel Grille inlet Knock out system Knock out system 75 65 Drain hose (0.54m) Connecting pipe (0.39m) Connecting pipe (0.49m) (Flare ø15.88) (Flare ø6.35) 763.5 For stud bolt (ø6) For stud bolt (ø8 –... - Page 7 FILE NO. SVM-01010 2-2. Indoor Unit (RAS-18UKX, RAS-18UK-AR) Back body Front panel Grille inlet Knock out system Knock out system 75 65 Drain hose (0.54m) Connecting pipe (0.39m) Connecting pipe (0.49m) (Flare ø12.7) (Flare ø6.35) 763.5 For stud bolt (ø6) For stud bolt (ø8 –...
- Page 8 FILE NO. SVM-01010 2-3. Outdoor Unit (RAS-24UAX, RAS-24UA-AR) – 7 –...
- Page 9 FILE NO. SVM-01010 2-4. Outdoor Unit (RAS-18UAX, RAS-18UA-AR) – 8 –...
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Page 10: Wiring Diagram
FILE NO. SVM-01010 3. WIRING DIAGRAM 3-1. RAS-24UKX / RAS-24UAX RAS-24UK-AR / RAS-24UA-AR COLOR IDENTIFICATION BROWN FAN MOTOR LOUVER WHITE MOTOR YELLOW BLUE DC MOTOR BLACK GRAY PINK ORANGE GRN&YEL GREEN & YELLOW : GREEN CN 07 CN 10 IC04... -
Page 11: Ras-18Ukx / Ras-18Uax Ras-18Uk-Ar / Ras-18Ua-Ar
FILE NO. SVM-01010 3-2. RAS-18UKX / RAS-18UAX RAS-18UK-AR / RAS-18UA-AR COLOR IDENTIFICATION BROWN FAN MOTOR LOUVER WHITE MOTOR YELLOW BLUE DC MOTOR BLACK GRAY PINK ORANGE YELLOW GRN&YEL GREEN & GREEN CN 07 CN 10 IC04 SG01 VARISTOR DB01 T6.3A 250V F01 FUSE DC15V DC0V... -
Page 12: Specification Of Electrical Parts
FILE NO. SVM-01010 4. SPECIFICATION OF ELECTRICAL PARTS 4-1. Indoor Unit Parts name Type Specifications Fan motor (for indoor) ICF-340-30-2 Output (Rated) 30W, 220-240V Thermo sensor ——— 10k at 25°C (TA-sensor) DC-DC transformer (T01) SWT-58A DC 390V, Secondary DC 15V, 12V, 7V Microcomputer TMP87CM40AN Heat exchanger sensor... - Page 13 FILE NO. SVM-01010 4-3. Outdoor Unit (RAS-18UAX, RAS-18UA-AR) Parts name Type Specifications Output (Rated) 1500W, 2poles, 1phase, 220 – 240V, 50Hz Compressor PA225X3F-4L Winding resistance (Ω) Red-Black White-Black (at 20°C) 1.35 2.68 Output (Rated) 65W, 6poles,1phase, 220 – 240V, 50Hz Fan motor (for outdoor) HF-240-42A Winding resistance (Ω)
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Page 14: Indoor Unit
FILE NO. SVM-01010 5. REFRIGERATION CYCLE DIAGRAM 5-1. RAS-24UKX / RAS-24UAX RAS-24UK-AR / RAS-24UA-AR Indoor unit Evaporator Cooling 0.39m 0.49m (Connecting pipe) (Connecting pipe) 15.88 6.35 Cross flow fan O.D.:15.88mm O.D.:6.35mm Packed valve Packed valve ( 15.88 ) ( 6.35) Gas container connection (Reinstall etc.) -
Page 15: Ras-18Ukx / Ras-18Uax
FILE NO. SVM-01010 5-2. RAS-18UKX / RAS-18UAX Indoor unit Evaporator 0.39m 0.49m (Connecting pipe) (Connecting pipe) 12.7 6.35 Cross flow fan O.D.:12.7mm O.D.:6.35mm Packed valve Packed valve ( 12.7) ( 6.35) Capillary tube 2.4x1000S Compressor PH250X3-4LM Condenser Muffler Refrigerant R-22 1.06 kg Propeller fan Outdoor unit Mark (... -
Page 16: Ras-18Uk-Ar / Ras-18Ua-Ar
FILE NO. SVM-01010 5-3. RAS-18UK-AR / RAS-18UA-AR Indoor unit Evaporator 0.49m 0.39m (Connecting pipe) (Connecting pipe) 12.7 6.35 Cross flow fan O.D.:12.7mm O.D.:6.35mm Packed valve Packed valve ( 12.7) ( 6.35) Capillary tube 2.0x1000S Compressor PH250X3-4LM Capillary tube 0.8x900S Condenser Refrigerant R-22 1.17 kg Propeller fan... -
Page 17: Control Block Diagram
FILE NO. SVM-01010 6. CONTROL BLOCK DIAGRAM Indoor Unit Control Panel M.C.U. Functions Operation Heat Exchanger Sensor • Louver Control Display • 3-minute Delay at Restart for Compressor Temperature Sensor Timer Display • Motor Revolution Control Infrared Rays Signal Receiver Filter Sign •... -
Page 18: Operation Description
• Transferring of operation commands to the outdoor unit • Receiving of information of the operation status and judging of the information or indication of Table 7-1-1 error RAS-24UKX RAS-18UKX (2) Role of outdoor unit controller RAS-24UK-AR RAS-18UK-AR MODEL The outdoor unit controller receives the operation... -
Page 19: Description Of Operation Circuit
FILE NO. SVM-01010 7-2. Description of Operation Circuit 7-2-2. Cooling operation ([MODE] button on the remote control is set (1) When turning on the breaker, the operation lamp to the cooling operation.) blinks. This means that the power is on (or the (1) The compressor, outdoor fan and operation power supply is cut off.) display on the remote control are controlled as... -
Page 20: Cooling Operation
(4 to 6 minutes). While the compressor is turning off, the indoor fan motor operates in the SUPER LOW position. The pattern of operation depending on the relation RAS-24UKX, RAS-24UK-AR RAS-18UKX,RAS-18UK-AR between room temperature and preset tempera- tures is shown in Fig. 7-2-5. -
Page 21: Econo. Mode
FILE NO. SVM-01010 7-3. ECONO. Mode 7-4. High-Temperature Limit Control ([ECONO.] button on the remote The microprocessor detects the indoor heat exchanger control is pressed.) temperature to prevent pressure of a refrigerating cycle from increasing excessively. When [ECONO.] button is pressed while the indoor The compressor and outdoor fan motor are controlled unit is in Cooling or Auto operation, ( ) mark is as shown in Fig. -
Page 22: Auto Restart Function
FILE NO. SVM-01010 7-6. Auto Restart Function 7-6-1. How to set auto restart function The indoor unit is equipped with an automatic restart- To set the auto restart function, proceed as follows: ing function which allows the unit to restart operating The power supply to the unit must be on;... -
Page 23: Filter Check Lamp
FILE NO. SVM-01010 7-6-2. How to cancel auto restart function To cancel automatic restart function, proceed as follows: Repeat the setting prodedure: the unit receives the signal and beeps three times. The unit will be required to be turned on with the remote control after the main power supply is turned off. -
Page 24: Installation Procedure
And make sure the equipment to be earthed. • Appliance shall be installed in accordance with national wiring regulations. If you detect any damage, do not install the unit. Contact your Toshiba dealer immediately. CAUTION • Exposure of unit to water or other moisture before installation may cause a short circuit. - Page 25 FILE NO. SVM-01010 REQUIREMENT OF REPORT TO THE LOCAL POWER SUPPLIER Please make sure certainly that the installation of this air conditioner will be reported to the local power supplier before installation. If you have any obscure problems (or if the power supplier does not accept the installation) of this appliance, service agency will take adequate countermeasures.
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Page 26: Installation Diagram Of Indoor And Outdoor Units
FILE NO. SVM-01010 8-2. Installation Diagram of Indoor and Outdoor Units For installation of the indoor unit, use the paper pattern on the back of the installation manual. For the rear left and left Hook piping Installation plate Wall Insert the cushion between the indoor unit and wall, and lift indoor unit to make work easier. -
Page 27: Installation
FILE NO. SVM-01010 8-3. Installation 8-3-1. Optional installation parts Part Parts name Q'ty Code Refrigerant piping Liquid side : ∅6.35 mm : ∅12.70 mm (RAS-18UK) Gas side each : ∅15.88 mm (RAS-24UK) Pipe insulating material (polyethylene foam, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit>... - Page 28 FILE NO. SVM-01010 8-3-2. Accessory and installation parts Part Part Part Part name (Q'ty) Part name (Q'ty) Part name (Q'ty) Mounting screw ∅4 x 25 s x 8 Installation plate x 1 Battery x 2 Pan head wood screw ∅3.1 x 16 s x 2 Wireless remote control x 1 Remote control holder x 1 Name...
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Page 29: Indoor Unit
FILE NO. SVM-01010 8-4. Indoor Unit 8-4-2. Cutting a hole and mounting installation plate 8-4-1. Installation place <Cutting a hole> • A place which provides the spaces around the When install the refrigerant pipes from the rear. indoor unit as shown in the above diagram. •... - Page 30 FILE NO. SVM-01010 <When the installation plate is directly mounted on 8-4-3. Electrical work the wall> 1. The supply voltage must be the same as the rated 1. Securely fit the installation plate onto the wall by voltage of the air conditioner. screwing it in the upper and lower parts to hook up 2.
- Page 31 FILE NO. SVM-01010 8-4-4. Wiring connection CAUTION • Be sure to refer to the wiring system diagram Air Inlet grille labeled inside the front panel. • Check local electrical cords and also any specific wiring instructions or limitation. Front panel Connecting cable Terminal block Fig.
- Page 32 FILE NO. SVM-01010 8-4-5. Piping and drain hose installation To connect pipe after installation of unit (figure) <In case of rightward piping> (To the forefront of flare) • After scribing slits of the body-right by a knife or a 400 mm Liquid side making-off pin, cut them by a pair of nippers or the 300 mm...
- Page 33 FILE NO. SVM-01010 8-4-6. Indoor unit fixing 8-4-7. Drainage 1. Pass the pipe through the hole in the wall, and hook 1. Run the drain hose sloping downwards. the indoor unit on the installation plate at the upper hooks. NOTE: 2.
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Page 34: Outdoor Unit
FILE NO. SVM-01010 8-5. Outdoor Unit 8-5-2. Refrigerant piping connection 1. Cut the pipe with a pipe cutter. 8-5-1. Installation place • A place which provides the spaces around the outdoor unit as shown in the left diagram. Obliquity Roughness Warp 90°... - Page 35 FILE NO. SVM-01010 (Unit : N·m) 8-5-3. Evacuating Outer dia. After the piping has been connected to the indoor unit, Tightening torque of copper pipe you can perform the air purge together at once. ∅6.35 mm 16 to 18 (1.6 to 1.8 kgf·m) AIR PURGE ∅12.70 mm 50 to 62 (5.0 to 6.2 kgf·m)
- Page 36 FILE NO. SVM-01010 8-5-4. Wiring connection TO CHARGE REFRIGERANT 1. Remove the electric parts cover from the outdoor RAS-18UKX / 18UAX RAS-24UKX / 24UAX unit. RAS-18UK-AR / 18UA-AR RAS-24UK-AR / 24UA-AR 2. Connect the connecting cable to the terminal as...
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Page 37: Others
FILE NO. SVM-01010 8-6. Others 8-6-3. Auto restart setting This product is designed so that, after a power failure, 8-6-1. Gas leak test it can restart automatically in the same operating mode Electric parts cover as before the power failure. Information Flare nut connections The product was shipped with Auto Restart func-... -
Page 38: Troubleshooting Chart
FILE NO. SVM-01010 9. TROUBLESHOOTING CHART 9-1. Troubleshooting Procedure: 9-2-2. Incorrect cable connection between indoor and outdoor units Follow the details of 9-2. Basic Check Items. The indoor unit is connected to the outdoor unit with 4 If there is no trouble corresponding to 9-2, check cables. -
Page 39: Primary Judgement
FILE NO. SVM-01010 9-3. Primary Judgement 9-3-2. Failure diagnosis 9-3-1. Role of indoor unit controller The indoor unit diagnoses the operation condition and indicates the information of the self-diagnosis with the The indoor unit controller receives the operation lamps on the display panel of the indoor unit. commands from the remote control and executes them. -
Page 40: Self-Diagnosis By Remote Control (Check Code)
FILE NO. SVM-01010 9-4. Self-Diagnosis by Remote Control (2) When the remote control is set to the service mode, the indoor controller diagnoses the operation (Check Code) condition and indicate the information of the self- diagnosis on the display of the remote control with (1) If the lamps are indicated as shown B to H in Table the check codes. - Page 41 FILE NO. SVM-01010 Table 9-4-1 Block level Diagnosis function Judgement and action Check Check Unit Block Symptom Condition code code status Indoor The indoor thermo sensor (TA) is Operation The lamp on the 1. Check the indoor thermo sensor (TA). P.C.
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Page 42: How To Diagnose Faulty Parts
FILE NO. SVM-01010 9-5. How to Diagnose Faulty Parts Operation [09 Other cycle error] (1) Check item Conceivable principle cause Measure Does compressor operate? Item by symptoms Does inner Check charged amount of refrigerant. overload relay Is compressor Check defective overload. (in compressor) turned off shortly? Check compressor. - Page 43 FILE NO. SVM-01010 [0C Indoor TA sensor error] Connect CN04 Is CN04 (TA sensor connector) properly. connected properly? Is TA sensor resistance value Replace (10 kΩ at 25°C) normal? TA sensor. Replace Indoor P.C. board is defective. P.C. board. [0d Indoor TC sensor error] Connect CN05 Is CN05 (TC sensor connector) properly.
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Page 44: Troubleshooting For Indoor Unit
FILE NO. SVM-01010 9-6. Troubleshooting for Indoor Unit Operation 9-6-1. Power can not be turned on. (The unit does not operate at all.) Check item <Primary check> Conceivable principle cause (1) Is the supply voltage normal? (2) Is the connection to the AC output OK? Measure (3) Are the connection of the primary side and the secondary side of the power transformer inserted into the P.C. - Page 45 FILE NO. SVM-01010 9-6-2. Only indoor fan motor does not operate. <Primary check> (1) Is it possible to detect the power supply voltage (200 – 240V) between 1 and 2 on the terminal block? (2) Does the indoor fan motor operate in cooling operation? Turn off power supply once, and turn it on again.
- Page 46 FILE NO. SVM-01010 9-6-3. Indoor fan motor automatically starts to rotate by turning on power supply. <Cause> The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to the inside of the motor. If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning on power supply.
- Page 47 FILE NO. SVM-01010 9-6-4. Compressor does not operate. <Primary check> (1) Is the preset temperature higher than the room temperature in cooling operation? (2) Is the crossover cable connected properly? <Inspection procedure> Turn on power supply. Refer to 9-6-1 “Power Does OPERATION can not be turned on”.
- Page 48 FILE NO. SVM-01010 <Inspection procedure> Turn on power supply. Does OPERATION Refer to item “Power lamp blink? can not be turned on”. Is it possible to start Refer to 9-9 “Troubleshooting unit by remote control? for Remote Control”. Is it possible to detect DC Check TA and TC sensors or 15 –...
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Page 49: Troubleshooting For Wiring (Interconnect Cable And Serial Signal Wire)
FILE NO. SVM-01010 9-7. Troubleshooting for Wiring (Interconnect Cable and Serial Signal Wire) 9-7-1. Outdoor unit does not operate. <Inspection procedure> (1) Is the voltage between 2 and 3 of the indoor terminal block varied? (2) Are signals from the indoor unit to the outdoor unit transmitted correctly based upon the following diagram? NOTE: •... -
Page 50: Troubleshooting For P.c. Board
FILE NO. SVM-01010 9-8. Troubleshooting for P.C. Board (1) If the P.C. board is detective, check for disconnec- tion, burn or discoloration of the copper foil pattern 9-8-1. How to check indoor P.C. board of the P.C. board. (2) The P.C. board consists of the following 2 parts: <Cautions for handling P.C. - Page 51 FILE NO. SVM-01010 Procedure Check points Causes Press [START/STOP] button once 1. Check whether or not the compres- 1. The temperature of the indoor to start the unit. sor operates. heat exchanger is extremely low. • Shorten the time of the restart 2.
- Page 52 FILE NO. SVM-01010 9-8-4. P.C. board layout Top View Bottom View – 51 –...
- Page 53 FILE NO. SVM-01010 10-3. Outdoor Unit (RAS-18UAX, RAS-18UA-AR) Part name Procedures Remarks Common 1) Stop the operation of the air conditioner Electrical parts and turn off its main power supply or procedure cover remove the power supply wires. 2) Remove the electrical parts cover. (4 screws) 3) Remove the cord clamps.
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Page 54: Part Replacement
FILE NO. SVM-01010 10. PART REPLACEMENT 10-1. Indoor Unit Part name Procedures Remarks Front panel How to remove the front panel 1) Stop the operation of the air conditioner and turn off its main power supply. 2) Pull the inlet grille toward you to open it and remove 4 screws fixing the front panel. - Page 55 FILE NO. SVM-01010 Part name Procedures Remarks Horizontal grille 1) Remove center 2 shafts of the horizontal (1) Center shafts grille from the back body. 2) Remove left shaft of the horizontal grille from the back body. (2) Left shafts 3) Remove the horizontal grille from the back body.
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Page 56: Outdoor Unit (Ras-24Uax, Ras-24Ua-Ar)
FILE NO. SVM-01010 10-2. Outdoor Unit (RAS-24UAX, RAS-24UA-AR) Part name Procedures Remarks Common 1) Stop the operation of the air conditioner Top cabinet and turn off its main power supply or procedure Electrical remove the power supply wires. parts cover 2) Remove the electrical parts cover. -
Page 57: Outdoor Unit (Ras-18Uax, Ras-18Ua-Ar)
FILE NO. SVM-01010 10-3. Outdoor Unit (RAS-18UAX, RAS-18UA-AR) Part name Procedures Remarks Common 1) Stop the operation of the air conditioner Electrical parts and turn off its main power supply or procedure cover remove the power supply wires. 2) Remove the electrical parts cover. (4 screws) 3) Remove the cord clamps. -
Page 58: Exploded Views And Parts List
FILE NO. SVM-01010 11. EXPLODED VIEWS AND PARTS LIST 11-1. Indoor Unit (1) 406 (24UK model) 407 (18UK model) Location Part Location Part Description Description 43T60002 Terminal Block, 3P 43T69066 P.C. Board ASSY, WRS-LED 3P AC300V, 20A MCC-819 43T69004 Sensor, Heat Exchanger 43T69065 P.C. - Page 59 FILE NO. SVM-01010 11-2. Indoor Unit (2) 206, 207 215, 216 231, 232 235, 236 Location Part Location Part Description Description 43T00048 Front Panel, ASSY 43T49039 Holder, Plate, EVA-Seal 43T00350 Grille ASSY 43T49036 Plate, EVA-Seal 43T80014 Air Filter (L) 43T49037 Holder, Plate EVA-Seal 43T80013 Air Filter (R) 43T79007 Guide Drain 43T44310 Refrigeration Cycle Assembly (24UK)
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Page 60: Outdoor Unit (Ras-24Uax, Ras-24Ua-Ar)
FILE NO. SVM-01010 11-3. Outdoor Unit (RAS-24UAX, RAS-24UA-AR) Location Part Location Part Description Description 43T00024 Panel, Air Outlet 43141301 Compressor, PH280X3-4MS 43T00025 Panel, Front 43T62014 Protector, Cord 43T00026 Panel, Side 43T62015 Protector, Cord 43T42002 Base Assembly 43T49011 Base, Spring A 43T19012 Guard, Fin 43T49019 Spring, Buffer 43T19011 Guard, Fan... -
Page 61: Outdoor Unit (Ras-18Uax)
FILE NO. SVM-01010 11-4. Outdoor Unit (RAS-18UAX) 23: Capillary tube 2.4 Dia. Location Part Location Part Description Description 43005144 Front Cabinet 43T47020 Bonnet, 6.35 Dia. 43T00005 Back Cabinet 43T46019 Valve, Packed 12.7 43T00004 Side Cabinet 43T47018 Bonnet, 1.2 Dia. 43042446 Base 43T47025 Tube, Capillary, 2.4 Dia. -
Page 62: Outdoor Unit (Ras-18Ua-Ar)
FILE NO. SVM-01010 11-5. Outdoor Unit (RAS-18UA-AR) 16,17 18,19 20: Capillary tube 0.8 Dia. 22: Capillary tube 2.0 Dia. Location Part Location Part Description Description 43005144 Front Cabinet 43T47020 Bonnet, 6.35 Dia. 43T00005 Back Cabinet 43T46019 Valve, Packed 12.7 43T00004 Side Cabinet 43T47018 Bonnet, 1.2 Dia.