Toshiba RAS-18NKHD-E5 Service Manual
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Toshiba RAS-18NKHD-E5 Service Manual

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FILE NO. SVM-06005

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE
RAS-18NKHD-E5 / RAS-18NAH-E
RAS-18NKD-E5 / RAS-18NA-E
RAS-24NKD-E5 / RAS-24NA-E
RAS-18NKDX5 / RAS-18N2AX
RAS-24NKDX5 / RAS-24N2AX
18 Class
24 Class
May, 2006

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Summary of Contents for Toshiba RAS-18NKHD-E5

  • Page 1: Service Manual

    FILE NO. SVM-06005 SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE RAS-18NKHD-E5 / RAS-18NAH-E RAS-18NKD-E5 / RAS-18NA-E RAS-24NKD-E5 / RAS-24NA-E RAS-18NKDX5 / RAS-18N2AX RAS-24NKDX5 / RAS-24N2AX 18 Class 24 Class May, 2006...

  • Page 2: Table Of Contents

    SPECIFICATIONS CONSTRUCTION VIEWS Indoor Unit Outdoor Unit (24 chassis) Outdoor Unit (18 chassis) WIRING DIAGRAM RAS-18NKHD-E5 / RAS-18NAH-E RAS-24NKD-E5 / RAS-24NA-E, RAS-24NKDX5 / RAS-24N2AX RAS-18NKD-E5 / RAS-18NA-E, RAS-18NKDX5 / RAS-18N2AX SPECIFICATION OF ELECTRICAL PARTS Indoor Unit (RAS-18NKHD-E5) Outdoor Unit (RAS-18NAH-E)
  • Page 3 FILE NO. SVM-06005 INSTALLATION PROCEDURE Safety Cautions Installation Diagram of Indoor and Outdoor Units Installation Indoor Unit Outdoor Unit How to Set Remote Control Selector Switch Others TROUBLESHOOTING CHART Troubleshooting Procedure Basic Check Items Primary Judgement Self-Diagnosis by Remote Control (Check Code) How to Diagnose Faulty Part Troubleshooting for Indoor Unit Troubleshooting for Wiring (Interconnect cable and Serial Signal Wire)

  • Page 4: Specifications

    FILE NO. SVM-06005 1. SPECIFICATIONS RAS-24NKD-E5 RAS-24NKDX5 MODEL RAS-24NA-E RAS-24N2AX ITEM Cooling Cooling 220 V 240 V 220 V 240 V Capacity 6.40 6.45 6.40 6.45 Phase 1∅ Power source 220 – 240 Power consumption 2350 2440 2350 2440 Power factor Running current 0.3/10.5 0.3/11.0...
  • Page 5 FILE NO. SVM-06005 RAS-18NKHD-E5 RAS-18NKD-E5 RAS-18NKDX5 MODEL RAS-18NAH-E RAS-18NA-E RAS-18N2AX ITEM Cooling Heating Cooling Cooling 220 V 240 V 220 V 240 V 220 V 240 V 220 V 240 V Capacity 5.05 5.05 5.80 5.90 5.20 5.25 5.20 5.25 Phase 1∅...
  • Page 6 7°C Outdoor unit inlet air temperature (WB) 24°C 6°C Note : 2 • Charge refrigerant according to the table below. RAS-18NKHD-E5 / RAS-18NAH-E RAS-24NKD-E / RAS-24NA-E Refrigerant RAS-18NKD-E5 / RAS-18NA-E RAS-24NKDX5 / RAS-24N2AX RAS-18NKDX5 / RAS-18N2AX No need to charge...

  • Page 7: Construction Views

    FILE NO. SVM-06005 CONSTRUCTION VIEWS 2-1. Indoor Unit Back body Front panel Air filter Heat exchanger Plasma air purifier Air inlet Grille inlet Air outlet Knock out system Knock out system Connection pipe (0.49 m) Connection pipe (0.39 m) (Flare ∅6.35) (For 24 series : Flare ∅15.88) Drain hose (0.54 m) (For 18 series : Flare ∅12.7)
  • Page 8 FILE NO. SVM-06005 2-2. Outdoor Unit (24 Class) Ø6 hole Ø6 Hole Ø11x14 Hole A Detail Drawing (Back leg) 2 Ø 11x14 Hole B Detail Drawing (Front leg) Ø 25 Drain outlet (For Ø 8-Ø 10 anchor bolt) HANDLE FAN-GUARD HANDLE Ø...
  • Page 9 FILE NO. SVM-06005 2-3. Outdoor Unit (18 Class) Ø6 hole R5.5 Ø6 hole Ø11x14 hole A detail Drawing (Back leg) Ø 11 x 14 Hole Ø 25 Drain outlet B Detail Drawing (Front leg) (For 8 - 10 anchor bolt) Ø...

  • Page 10: Outdoor Unit (24 Chassis)

    3. WIRING DIAGRAM FILE NO. SVM-06005 3-1. RAS-18NKHD-E5 / RA S-18NA H-E COLOR IDENTIFICATION BRW : BROWN RED : RED Louver WHI : WHITE motor Infrared rays receive YEL : YELLOW and Indication parts BLU : BLUE BLK : BLACK...

  • Page 11: Ras-24Nkd-E5 / Ras-24Na-E, Ras-24Nkdx5 / Ras-24N2Ax

    FILE NO. SVM-06005 3-2. RAS-24NKD-E5 / RAS-24NA-E, RAS-24NKDX5 / RAS-24N2AX COLOR IDENTIFICATION BRW : BROWN RED : RED WHI : WHITE Louver YEL : YELLOW motor Infrared reys receive BLU : BLUE and Indication parts BLK : BLACK GRY : GRAY CN25 PNK : PINK ORN : ORANGE...

  • Page 12: Ras-18Nkd-E5 / Ras-18Na-E, Ras-18Nkdx5 / Ras-18N2Ax

    FILE NO. SVM-06005 3.3 RAS-18NKD-E5 / RAS-18NA-E, RAS-18NKDX5 / RAS-18N2AX COLOR IDENTIFICATION BRW : BROWN RED : RED WHI : WHITE Louver YEL : YELLOW motor Infrared rays receive BLU : BLUE and Indication parts BLK : BLACK GRY : GRAY CN25 PNK : PINK ORN : ORANGE...

  • Page 13: Specification Of Electrical Parts

    FILE NO. SVM-06005 4. SPECIFICATION OF ELECTRICAL PARTS 4-1. Indoor Unit (RAS-18NKHD-E5) Parts name Type Specifications AC 200 − 240V, 31W Fan motor (for indoor) AFS-220-31A Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C µRM1260V Micro Power Module (M01) DC 390 V, Secondary DC 12 V...

  • Page 14: Indoor Unit (Ras-24Nkd-E5, Ras-24Nkdx5, Ras-18Nkd-E5 , Ras-18Nkdx5)

    FILE NO. SVM-06005 4-3. Indoor Unit (RAS-24NKD-E5,RAS-24NKDX5, RAS-18NKD-E5, RAS-18NKDX5) Parts name Type Specifications AC 200 − 240V, 31W Fan motor (for indoor) AFS-220-31A Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C µRM1260V Micro Power Module (M01) DC 390 V, Secondary DC 12 V Microcontroller TMP87CM40AN Heat exchanger sensor...

  • Page 15: Outdoor Unit (Ras-18Na-E, Ras-18N2Ax)

    FILE NO. SVM-06005 4-5. Outdoor Unit (RAS-18NA-E, RAS-18N2AX) Parts name Type Specifications Output (Rated) 1500 W, 2 poles, 1 phase, 220 – 240 V, 50 Hz Compressor PH340X3C-4KT1 Winding resistance (Ω) (at 20°C) 1.46 2.47 Output (Rated) 42 W, 6 poles, 1 phase, 220 – 240 V, 50 Hz Fan motor (for outdoor) WLF-240-42A-1 Winding resistance (Ω)

  • Page 16: Refrigeration Cycle Diagram

    FILE NO. SVM-06005 5. REFRIGERATION CYCLE DIAGRAM 5-1. RAS-18NKHD-E5 / RAS-18NAH-E Indoor unit Evaporator Cooling 0.39 m 0.49 m Heating (Connecting pipe) (Connecting pipe) ∅12.7 ∅6.35 Cross flow fan O.D.:12.7 mm O.D.:6.35 mm Packed valve Packed valve (∅12.7) (∅6.35) Gas container connection (Reinstall etc.)

  • Page 17: Ras-24Nkd-E5 / Ras-24Na-E, Ras-24Nkdx5 / Ras-24N2Ax

    FILE NO. SVM-06005 5-2. RAS-24NKD-E5 / RAS-24NA-E, RAS-24NKDX5 / RAS-24N2AX Indoor unit Evaporator Cooling 0.39 m 0.49 m (Connecting pipe) (Connecting pipe) ∅15.88 ∅6.35 Cross flow fan O.D.:15.88 mm O.D.:6.35 mm Packed valve Packed valve (∅15.88) (∅6.35) Gas container connection (Reinstall etc.) Compressor PH400X3CS-4KT1 Capillary tube...

  • Page 18: Ras-18Nkd-E5 / Ras-18Na-E, Ras-18Nkdx5 / Ras-18N2Ax

    FILE NO. SVM-06005 5-3. RAS-18NKD-E5 / RAS-18NA-E, RAS-18NKDX5 / RAS-18N2AX Indoor unit Evaporator 0.39 m 0.49 m (Connecting pipe) (Connecting pipe) ∅12.7 ∅6.35 Cross flow fan O.D.:12.7 mm O.D.:6.35 mm Packed valve Packed valve (∅12.7) (∅6.35) Capillary tube ∅2.0x600 s PH340X3C-4KT1 Compressor Dryer...

  • Page 19: Control Block Diagram

    FILE NO. SVM-06005 6. CONTROL BLOCK DIAGRAM 6-1. RAS-18NKHD-E5 / RAS-18NAH-E Indoor Unit Control Panel M.C.U. Operation Display Functions Heat Exchanger Sensor • Louver Control Timer Display • 3-minute Delay at Restart for Compressor Temperature Sensor Filter Sign Display • Motor Revolution Control...

  • Page 20: Ras-18Nkd-E5 / Ras-18Na-E, Ras-18Nkdx5 / Ras-18N2Ax Ras-24Nkd-E5 / Ras-24Na-E, Ras-24Nkdx5 / Ras-24N2Ax

    FILE NO. SVM-06005 6-2. RAS-18NKD-E5 / RAS-18NA-E, RAS-18NKDX5 / RAS-18N2AX RAS-24NKD-E5 / RAS-24NA-E, RAS-24NKDX5 / RAS-24N2AX Indoor Unit Control Panel M.C.U. Operation Functions Display Heat Exchanger Sensor • Louver Control Timer Display • 3-minute Delay at Restart for Compressor Temperature Sensor Filter Sign Display •...

  • Page 21: Operation Description

    FILE NO. SVM-06005 7. OPERATION DESCRIPTION • Turning off the compressor and outdoor fan 7-1. Outline of Air Conditioner Control when the outdoor unit receives the shutdown This is a fixed capacity type air conditioner, which uses command a AC motor for an indoor fan. The AC motor drive •...

  • Page 22: Description Of Operation Circuit

    FILE NO. SVM-06005 7-2-2. Cooling operation 7-2. Description of Operation Circuit ([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, 4-way valve, outdoor fan and power supply is cut off.) operation display lamp are controlled as shown in...
  • Page 23 FILE NO. SVM-06005 7-2-3. Dry operation 7-2-4. Heating operation *Heat pump model only ([MODE] button on the remote control is set ([MODE] button on the remote control is set to the dry operation.) to the heating operation.) (1) The compressor, 4-way valve, outdoor fan and (1) The compressor, 4-way valve, outdoor fan and operation display lamp are controlled as shown in operation display lamp are controlled as shown in...

  • Page 24: Cooling Operation

    *3: SUL means Super Ultra Low. Fan only operation *4: Calculated from difference in motor speed between SUL and HIGH. Fig. 7-2-8 Cold draft preventing control Heating operation *5 and *6: RAS-18NKHD-E5 RAS-24NKD-E5, RAS-24NKDX5 RAS-18NKD-E5, RAS-18NKDX5 Table 7-2-1 Fig. 7-2-9 speed Starting period Stabilized period •...
  • Page 25 FILE NO. SVM-06005 (1) Operation flow chat. START OPERATION LED ON PAP LED ON Less than 1 hour Indoor fan ON 1 hour later Air-Purlfier OFF Air-Purlfier ON Error after 1 minute Error within 1 minute Operation confirm PAP LED ON FILTER LED ON No error Air-Purifier OFF...
  • Page 26 FILE NO. SVM-06005 (2) The indoor fan motor and Plasma Air-Purifier operation. • When Plasma Air-Purifier has been operated with other operation of air conditioner mode (Fan only, AUTO, Cooling, Dry or Heat). The speed revolution of indoor fan is based upon the operated mode of air conditioner. In fact, Plasma Air-Purifier works continuously.

  • Page 27: Hi Power Mode

    FILE NO. SVM-06005 7-3. Hi PO WER Mode 7-4. High-Temperature Limit Control *Heat pump model only ([Hi PO WER] b utton on the remote contr ol is pressed.) The microcontroller detects the indoor heat exchanger temperature to prevent pressure of a refrigerating cycle When [Hi PO WER] b utton is pressed while the indoor...
  • Page 28 FILE NO. SVM-06005 7-6-1. Defrost starting condition 7-6-2. Defrost finish condition. 1) If Te ≥ 3°C at least 60 sec -->4 way value on. A-Zone : If -10°C > Teo ≥ − 18°C, defrost will 2) If Te ≥ 8°C --> 4 way value on. start when.

  • Page 29: Auto Restart Function

    FILE NO. SVM-06005 7-7-1. How to set auto restart function 7-7. Auto Restart Function To set the auto restart function, proceed as follows: The indoor unit is equipped with an automatic The power supply to the unit must be on; the function restarting function which allows the unit to restart will not set if the power is off.

  • Page 30: Filter Check Lamp

    FILE NO. SVM-06005 7-7-2. How to cancel auto restart function To cancel auto 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 31: Self-Cleaning Function

    FILE NO. SVM-06005 7-9. Self-Cleaning function. Self-Cleaning function is designed to reduce humidity that causes mold to form inside the air conditioning unit. This advanced, efficient system reduces moisture in the coil. When you turn off your air conditioner, the internal fan activates and dries the moisture in the coil for 20 minutes, then turns off automatically.

  • Page 32: Quiet Mode

    FILE NO. SVM-06005 7-10. QUIET Mode 7-11-1. Cooling mode • The fan speed of indoor unit operates automatically, Quiet mode is the system which, control the it relates with the compressor's operation. revolving speed of indoor fan to work constantly at lower than speed L.

  • Page 33: Installation Procedure

    Also, make sure the equipment is properly 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 could result in electric shock.
  • Page 34 FILE NO. SVM-06005 REQUIREMENT OF REPORT TO THE LOCAL POWER SUPPLIER Please make absolutely sure that the installation of this appliance is reported to the local power supplier before installation. If you experience any problems, or if the installation is not accepted by the supplier, the service agency will take adequate countermeasures.

  • Page 35: Installation Diagram Of Indoor And Outdoor Units

    FILE NO. SVM-06005 8-2. Installation Diagram of Indoor and Outdoor Units Before installing the wireless remote control • With the remote control cover open, load the batteries supplied correctly, observing their polarity. Wireless remote control Cover For the rear left and left piping Hook Installation Wall...

  • Page 36: Installation

    FILE NO. SVM-06005 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 (18 series) Gas side each : ∅15.88 mm (24 series) Pipe insulating material (polyethylene foam, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit>...
  • Page 37 FILE NO. SVM-06005 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 x 8 Installation plate x 1 Remote control holder x 1 Pan head wood screw ∅...

  • Page 38: Indoor Unit

    FILE NO. SVM-06005 8-4-2. Cutting a hole and mounting installation 8-4. Indoor Unit plate 8-4-1. Installation place <Cutting a hole> • A place which provides the spaces around the When installing the refrigerant pipes from the rear. indoor unit as shown in the above diagram. •...
  • Page 39 FILE NO. SVM-06005 <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 40 FILE NO. SVM-06005 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 limitations. Front panel Connecting cable Fig.
  • Page 41 FILE NO. SVM-06005 8-4-5. Piping and Drain Hose Installation To connect the pipe after installation of the 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...
  • Page 42 FILE NO. SVM-06005 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 sloped downwards. the indoor unit on the installation plate at the upper hooks. NOTE •...

  • Page 43: Outdoor Unit

    FILE NO. SVM-06005 8-5-2. Refrigerant piping connection 8-5. Outdoor Unit 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. Roughness Warp Obliquity 90°...
  • Page 44 FILE NO. SVM-06005 (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 45 FILE NO. SVM-06005 <Stripping length of connecting cable> TO CHARGE REFRIGERANT Terminal block RAS-18NKHD-E5 / RAS-18NAH-E RAS-24NKD-E5 / RAS-24NA-E Refri gerant RAS-18NKD-E5 / RAS-18NA-E RAS-24NKDX5 / RAS-24N2AX RAS-18NKDX5 / RAS-18N2AX No need to charge 15 m or less 15 m or less...

  • Page 46: How To Set Remote Control Selector Switch

    FILE NO. SVM-06005 2. Set the remote control selector switch with the 8-6. How to Set Remote Control Selector remote control Switch When two indoor units as installed in seperated rooms, [B] is indicated on the liquid crystal display when there is no need to change the selector switch.

  • Page 47: Others

    FILE NO. SVM-06005 8-7-3. Auto restart setting 8-7. Others This product is designed so that, after a power failure, 8-7-1. Gas leak test Flare nut connections it can restart automatically in the same operating mode (Indoor unit) as before the power failure. Information Flare nut connections (Outdoor unit)

  • Page 48: Troubleshooting Chart

    FILE NO. SVM-06005 9. TROUBLESHOOTING CHART 9-2-2. Incorrect cable connection between Indoor 9-1. Troubleshooting Procedure : and outdoor units Follow the details of 9-2. Basic Check Items. The indoor unit is connected to the outdoor unit with If there is no trouble corresponding to 9-2, check 4 cables.

  • Page 49: Primary Judgement

    FILE NO. SVM-06005 9-3. Primary Judgement 9-3-2. Failure diagnosis The indoor unit diagnoses the operation condition and 9-3-1. Role of indoor unit controller 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 50: Self-Diagnosis By Remote Control (Check Code)

    FILE NO. SVM-06005 9-4. Self-Diagnosis by Remote Control (Check Code) (1) If the lamps are indicated as shown B to G in Table 9-3-1, exchanger the self-diagnosis by the remote control. (2) When the remote control is set to the service mode, the indoor controller diagnoses the operation condition and indicate the information of the self-diagnosis on the display of the remote...
  • Page 51 FILE NO. SVM-06005 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.

  • Page 52: How To Diagnose Faulty Part

    FILE NO. SVM-06005 9-5. How To Diagnose Faulty Parts Operation Check item Conceivable principle cause [04 Serial signal error] (Heat pump model) Measure Item by symptoms Does outdoor unit operate? Connect crossover Are 1, 2 and 3 crossover wires properly. wires connected properly? Is connector Connect connector...
  • Page 53 FILE NO. SVM-06005 [09 Other cycle error] (1) (Heat pump model) Does compressor operate? Does inner Check charged amount of refrigerant. Is compressor overload relay Check defective overload. turned off shortly? (in compressor) Check compressor. operate? Failure Replace Is TC sensor resistance value compressor.
  • Page 54 FILE NO. SVM-06005 [0C Indoor TA sensor error] Is CN03 (TA sensor connector) Connect CN03 properly. connected properly? Is TA sensor resistance value Replace TA sensor. (10 kΩ at 25°C) normal? Indoor P.C. board is defective. Replace P.C. board. [0d Indoor TC sensor error] Is CN01 (TC sensor connector) Connect CN01 properly.
  • Page 55 FILE NO. SVM-06005 [19 outdoor TD sensor error] (Heat pump model) Connect connector Is TD sensor connected properly? properly. Is TD sensor resistance value Replace TD sensor. (50 kΩ at 25°C) normal? Outdoor P.C. board is defective. Replace P.C. board. [1E Discharge temp.

  • Page 56: Troubleshooting For Indoor Unit

    FILE NO. SVM-06005 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 <Primar check> Conceivable principle (1) Is the supply voltage normal? cause (2) Is the connection to the AC output OK? (3) Is the fuse (F01) blown? Measure Item by symptoms...
  • Page 57 FILE NO. SVM-06005 9-6-2. Only the indoor fan does not operate <Primary chec k> (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? (In heating operation, the indoor fan motor does not operate for approximately 5 minutes after it is turned on, to prevent a cold air from blowing in.) Shut off the...
  • Page 58 FILE NO. SVM-06005 9-6-3. 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 59 FILE NO. SVM-06005 <Inspection procedure> - Cooling model - Turn on power supply. Refer to item Power Does OPERATION can not be turned on . lamp blink? Refer to 9-9 Troubleshooting Is it possible to start for Remote Control . unit by remote control? Is it possible to detect AC 200V Replace P.C.
  • Page 60 FILE NO. SVM-06005 <Inspection procedure) - Heating model - AC 70-100V Replace transformer outdoor P.C. board. − 59 −...
  • Page 61 FILE NO. SVM-06005 Rewire or replace Are all of compressor cords normal? defective cords. Is compressor motor winding normal? Replace compressor. Compressor is defective. (Check winding resistor.) Is capacitor for compressor normal? Replace capacitor. Capacitor is defective. Replace overload relay. Is overload relay normal? Overload relay is defective.

  • Page 62: Troubleshooting For Wiring (Interconnect Cable And Serial Signal Wire)

    FILE NO. SVM-06005 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 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: Measure the voltage for 2 minutes and 30 seconds after starting the unit.

  • Page 63: Troubleshooting For Air Purifier And Minus Ion

    FILE NO. SVM-06005 9-8. Troubleshooting for Air Purifier and Minus Ion 9-8-1. How to Check Whether the Air Purifier is Good or Not Turn off the power breaker once, and turn on again after 10 seconds. Does the OPERATION lamp blink? To item Power supply is not turned on Turn off the power breaker and remove CN34 (Micro switch connector).
  • Page 64 FILE NO. SVM-06005 9-8-2. How to Check Whether the Minus Ion Generator is Good or Not Turn off the power breaker once, and turn on again after 10 seconds. Does the OPERATION lamp blink? To item Power supply is not turned on Turn off the power breaker and remove CN34 (Micro switch connector).

  • Page 65: Troubleshooting For P.c. Board

    FILE NO. SVM-06005 9-9. Troubleshooting for P.C. board <Inspection procedure> (1) If the P.C. board is detective, check for disconnec- 9-9-1. How to check indoor P.C. board tion, burn or discoloration of the copper foil pattern of the P.C. board. <Cautions for handling P.C.
  • Page 66 FILE NO. SVM-06005 Procedure Check points Causes 1. The temperature of the indoor Press [ ] button once 1. Check whether or not the heat exchanger is extremely low. to start the unit. compressor operates. • Shorten the time of the restart 2.

  • Page 67: Troubleshooting For Remote Control

    FILE NO. SVM-06005 9-10. Troubleshooting for Remote Control The unit does not beep at all. Press [ OPERATION lamp on button. indoor unit is not indicated. Is transmission mark indicated? Press RESET button on remote control Is receiver on with tip of pencil. indoor unit exposed to direct sunlight? Does indoor unit...

  • Page 68: Part Replacement

    FILE NO. SVM-06005 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 the inlet grille.
  • Page 69 FILE NO. SVM-06005 Part name Procedures Remarks Horizontal grille 1) Remove center 2 shafts of the horizontal grille from (1) Center shafts 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.

  • Page 70: Outdoor Unit (Ras-24Na-E, Ras-24N2Ax)

    FILE NO. SVM-06005 10-2. Outdoor Unit (RAS-24NA-E, RAS-24N2AX) Part name Procedures Remarks Top cabinet 1) Stop the operation of the air conditioner and turn off Front cabinet its main power supply or remove the power supply cord. 2) Remove the packed valve cover and the electrical parts cover (2 screws ∅...
  • Page 71 FILE NO. SVM-06005 Part name Procedures Remarks 1) Perform the common procedure 1 Running 2) Remove the capacitor band. (1 screw ∅4 x 10L) capacitor 3) Disconnect the lead wires from the capacitor for compressor terminal. Spark killer Running capacitor for compressor 1) Perform the common procedure 1 Running...

  • Page 72: Outdoor Unit (Ras-18Nah-E, Ras-18Na-E, Ras-18N2Ax)

    FILE NO. SVM-06005 10-3 Outdoor Unit (RAS-18NAH-E, RAS-18NA-E, RAS-18N2AX) Part name Procedures Remarks 2 screws ∅ 4 x 10L Common 1) Stop the operation of the air conditioner and turn off procedure its main power supply or remove the power supply cord.

  • Page 73: Exploded Views And Parts List

    Location Part Location Part Description Description 43T60002 TERMINAL BLOCK; 3P 43T69554 PC BOARD 43T50004 SENSOR; HEAT EXCHANGER (For RAS-18NKHD-E5) 43T50314 SENSOR;THERMOSTAT 43T69555 PC BOARD 43T69482 PC BOARD ASSY;WRS-LED (For RAS-18NKD-E5, RAS-18NKDX5) 43T62003 CORD CLAMP 43T69455 PC BOARD (For RAS-24NKD-E5, RAS-24NKDX5)

  • Page 74: Indoor Unit

    HOSE ASSY;DRAIN 43T03343 BACK BODY ASSY 43T21367 MOTOR; STEPPING 43T07022 HOLDER; PIPE 43T44311 REFRIGERATION CYCLE ASSEMBLY 43T82007 PLATE; INSTALLATION (For RAS-18NKHD-E5, 43T69402 WIRELESS REMOCON RAS-18NKD-E5,RAS-18NKDX5) (For RAS-18NKHD-E5) 43T44310 REFRIGERATION CYCLE ASSEMBLY 43T69403 WIRELESS REMOCON (For RAS-24NKD-E5, RAS-24NKDX5) (For RAS-18NKD-E5, RAS-18NKDX5, 43T47311 PIPE;...

  • Page 75: Outdoor Unit (Ras-18Nah-E)

    FILE NO. SVM-06005 11-3. Outdoor Unit (RAS-18NAH-E) Location Part Location Part Description Description 43T42324 BASE PLATE ASSEMBLY 43T39318 MOTOR BASE 43T41371 COMPRESSOR; 43T19330 PACKED VALVE COVER PH340X3C-4KT1(Made in China) 43T00452 UPPER CABINET 43T49011 BASE; SPRING; A 43T96304 BUSHING 43T49012 BASE;SPRING; B 43T62325 ELECTRIC PART COVER(NEW) 43T49019...

  • Page 76: Outdoor Unit (Ras-24Na-E, Ras-24N2Ax)

    FILE NO. SVM-06005 11-4. Outdoor Unit (RAS-24NA-E, RAS-24N2AX) Location Part Location Part Description Description 43T42324 BASE PLATE ASSEMBLY 43T19329 FAN GUARD 43T41370 COMPRESSOR(Made in China) 43T04302 PARTITION 43T49011 BASE; SPRING; A 43T39317 MOTOR BASE 43T49012 BASE;SPRING; B CONNECTION PLATE(NEW) 43T49019 SPRING; BUFFER 43T39318 MOTOR BASE 43T97307 COMPRESSOR BOLT (M6) 43T19330 PACKED VALVE COVER...

  • Page 77: Outdoor Unit (Ras-18Na-E, Ras-18N2Ax)

    FILE NO. SVM-06005 11-5. Outdoor Unit (RAS-18NA-E, RAS-18N2AX) Location Part Location Part Description Description 43T42324 BASE PLATE ASSEMBLY 43T47001 NUT FLANGE 43T41371 COMPRESSOR; 43T19329 FAN GUARD PH340X3C-4KT1(Made in China) 43T04301 PARTITION 43T49011 BASE; SPRING; A 43T39317 MOTOR BASE 43T49012 BASE;SPRING; B CONNECTION PLATE(NEW) 43T49019 SPRING;...
  • Page 78 FILE NO. SVM-03010(1) TOSHIBA CARRIER (THAILAND) CO.,LTD. 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND. – 87 –...

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