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Toshiba RAS-24UFHP-E5 Service Manual
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Toshiba RAS-24UFHP-E5 Service Manual

Under ceiling/console type
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FILE NO. SVM-06006

SERVICE MANUAL

AIR-CONDITIONER
UNDER CEILING / CONSOLE TYPE
RAS-18UFHP-E5 / RAS-18NAH-E
RAS-24UFHP-E5 / RAS-24NAH-E
RAS-18UFP-E5 / RAS-18NA-E
RAS-24UFP-E5 / RAS-24NA-E
RAS-B18UFPX5 / RAS-18N2AX
RAS-24UFPX5 / RAS-24N2AX
18 Class
24 Class
May, 2006

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Summary of Contents for Toshiba RAS-24UFHP-E5

  • Page 1: Service Manual

    FILE NO. SVM-06006 SERVICE MANUAL AIR-CONDITIONER UNDER CEILING / CONSOLE TYPE RAS-18UFHP-E5 / RAS-18NAH-E RAS-24UFHP-E5 / RAS-24NAH-E RAS-18UFP-E5 / RAS-18NA-E RAS-24UFP-E5 / RAS-24NA-E RAS-B18UFPX5 / RAS-18N2AX RAS-24UFPX5 / RAS-24N2AX 18 Class 24 Class May, 2006...

  • Page 2: Table Of Contents

    Indoor Unit Outdoor Unit (24 Class) Outdoor Unit (18 Class) 3. WIRING DIAGRAM RAS-18UFHP-E5 / RAS-18NAH-E RAS-18UFP-E5 / RAS-18NA-E, RAS-B18UFPX5 / RAS-18N2AX RAS-24UFHP-E5 / RAS-24NAH-E RAS-24UFP-E5 / RAS-24NA-E RAS-24UFPX5 / RAS-24N2AX 4. SPECIFICATION OF ELECTRICAL PARTS Indoor Unit Outdoor Unit (RAS-18N2AH-E)
  • Page 3 FILE NO. SVM-06006 7. OPERATION DESCRIPTION 7-1 Outline of Air Conditioner Control 7-2 Description of Operation Circuit 7-3 Hi POWER Mode 7-4 High-Temperature Limit Control 7-5 Low-Temperature Limit Control 7-6 Defrosting Operation 7-7 Auto Restart Function 7-8 Filter Check Lamp 7-9 Self-Cleaning function 7-10 QUIET Mode 7-11 COMFORT SLEEP mode...
  • Page 4 FILE NO. SVM-06006 1. SPECIFICATIONS MODEL RAS-18UFP-E5/18NA-E RAS-18UFHP-E5/18NAH-E ITEM RAS-B18UFPX5/18N2AX Cooling Heating Cooling Capacity 220V 240V 220V 240V 220V 240V 5.00 5.70 5.80 5.20 5.25 Phase 1∅ Power source 220 – 240 Power consumption 2000 2130 1830 2000 2000 2120 Power factor Indoor 0.40...
  • Page 5 FILE NO. SVM-06006 MODEL RAS-24UFP-E5/24NA-E RAS-24UFHP-E5/24NAH-E ITEM RAS-24UFPX5/24N2AX Cooling Heating Cooling Capacity 220V 240V 220V 240V 220V 240V 6.10 6.20 6.60 6.70 6.10 6.20 Phase 1∅ Power source 220 – 240 Power consumption 2480 2650 2410 2590 2260 2400 Power factor Indoor 0.45...
  • Page 6 Outdoor unit inlet air temperature (WB) 24°C 6°C Note : 2 • Charge refrigerant according to the table below. RAS-18UFHP-E5 / RAS-18NAH-E RAS-24UFHP-E5 / RAS-24NAH-E RAS-18UFP-E5 / RAS-18NA-E RAS-24UFP-E5 / RAS-24NA-E Refrigerant RAS-B18UFPX5 / RAS-18N2AX RAS-24UFPX5 / RAS-24N2AX No need to charge...

  • Page 7: Construction Views

    FILE NO. SVM-06006 2. CONSTRUCTION VIEWS 2-1. Indoor Unit Front panel 1093 Knock out system Grille air inlet Back Body 200 Min 1093 For stud bolt (∅8 - ∅10) Installation plate 1015 For stud bolt (∅6) Mount plate M10 Suspention bolt Wireless remote control Knock out system UNDER CEILING &...

  • Page 8: Outdoor Unit (24 Class)

    FILE NO. SVM-06006 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: Outdoor Unit (18 Class)

    FILE NO. SVM-06006 2-3. Outdoor Unit (18 Class) Ø6 hole R5.5 Ø6 hole Ø11x14 hole A detail Drawing (Back leg) Ø 11 x 14 Hole 25 Drain outlet Ø B Detail Drawing (Front leg) (For 8 - 10 anchor bolt) Ø...

  • Page 10: Wiring Diagram

    FILE NO. SVM-06006 3. WIRING DIAGRAM 3-1. RAS-18UFHP-E5 / RAS-18NAH-E INFRARED RAYS RECEIVE AND INDICATION PARTS LOUVER 1 2 3 4 5 6 7 8 9 MOTOR CN25 1 2 3 4 5 6 7 8 9 COLOR IDENTIFICATION 6 5 4 3 2 1 1 2 3 4 5 6...

  • Page 11: Ras-18Ufp-E5 / Ras-18Na-E, Ras-B18Ufpx5 / Ras-18N2Ax

    FILE NO. SVM-06006 3-2. RAS-18UFP-E5 / RAS-18NA-E, RAS-B18UFPX5 / RAS-18N2AX INFRARED RAYS RECEIVE AND INDICATION PARTS LOUVER 1 2 3 4 5 6 7 8 9 MOTOR CN25 1 2 3 4 5 6 7 8 9 COLOR IDENTIFICATION 6 5 4 3 2 1 1 2 3 4 5 6...
  • Page 12 FILE NO. SVM-06006 3-3. RAS-24UFHP-E5 / RAS-24NAH-E INFRARED RAYS RECEIVE AND INDICATION PARTS LOUVER 1 2 3 4 5 6 7 8 9 MOTOR CN25 1 2 3 4 5 6 7 8 9 COLOR IDENTIFICATION 6 5 4 3 2 1...
  • Page 13 FILE NO. SVM-06006 3-4. RAS-24UFP-E5 / RAS-24NA-E RAS-24UFPX5 / RAS-24N2AX INFRARED RAYS RECEIVE AND INDICATION PARTS LOUVER 1 2 3 4 5 6 7 8 9 MOTOR CN25 1 2 3 4 5 6 7 8 9 COLOR IDENTIFICATION 6 5 4 3 2 1 1 2 3 4 5 6...

  • Page 14: Specification Of Electrical Parts

    FILE NO. SVM-06006 4. SPECIFICATION OF ELECTRICAL PARTS 4-1. Indoor Unit Parts name Type Specifications Fan motor (for indoor) AFP-220-50-4A Output (Rated) 50W, 220-240V Thermo sensor (TA-sensor) ——— 10kΩ at 25°C DC-DC transformer (T01) SWT-47 DC 390V, Secondary DC 12V, 7V Microcomputer TMP87CM40AN Heat exchanger sensor...

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

    FILE NO. SVM-0600 4-3. 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 FILE NO. SVM-06006 4-5. Outdoor Unit (RAS-24NA-E, RAS-24N2AX) Parts name Type Specifications Output (Rated) 2200 W, 2 poles, 1 phase, 220 − 240 V, 50 Hz Compressor PH400X3CS-4KT1 Winding resistance (Ω ) (at 20 °C) 2.10 1.13 Output (Rated) 42 W, 4 poles, 1 phase, 220 − 240 V, 50 Hz Winding resistance (Ω...

  • Page 17: Refrigeration Cycle Diagram

    FILE NO. SVM-06006 5. REFRIGERATION CYCLE DIAGRAM 5-1. RAS-18UFHP-E5 / RAS-18NAH-E Indoor unit Evaporator Cooling 0.39m 0.49m Heating (Connecting pipe) (Connecting pipe) ∅12.70 mm ∅6.35 mm Multi blade fan 0.39m (Flexible pipe) ∅ 12.70 mm O.D.:6.35 mm O.D.:12.70 mm Packed valve Packed valve (∅12.70) (∅6.35)

  • Page 18: Ras-B18Ufpx5 / Ras-18N2Ax

    FILE NO. SVM-06006 5-2. RAS-18UFP-E5 / RAS-18NA-E RAS-B18UFPX5 / RAS-18N2AX Indoor unit Evaporator 0.39m 0.49m (Connecting pipe) (Connecting pipe) ∅12.70 mm ∅6.35 mm Multi blade fan 0.39m (Flexible pipe) ∅12.70 mm O.D.:6.35 mm O.D.:12.70 mm Packed valve Packed valve (∅6.35) (∅12.70) Capillary tube ∅2.0x600S...
  • Page 19 FILE NO. SVM-06006 5-3. RAS-24UFHP-E5 / RAS-24NAH-E Indoor unit Evaporator Cooling 0.39m 0.49m Heating (Connecting pipe) (Connecting pipe) ∅15.88 mm ∅6.35 mm Multi blade fan 0.39m (Flexible pipe) ∅15.88 mm O.D.:6.35 mm O.D.:15.88 mm Packed valve Packed valve (∅6.35) (∅15.88)

  • Page 20: Ras-24Ufp-E5 / Ras-24Na-E

    FILE NO. SVM-06006 5-4. RAS-24UFP-E5 / RAS-24NA-E RAS-24UFPX5 / RAS-24N2AX Indoor unit Evaporator 0.39m 0.49m (Connecting pipe) (Connecting pipe) ∅15.88 mm ∅6.35 mm Multi blade fan 0.39m (Flexible pipe) ∅15.88 mm O.D.:6.35 mm O.D.:15.88 mm Packed valve Packed valve (∅6.35) (∅15.88 ) Cooling Capillary tube...

  • Page 21: Control Block Diagram

    FILE NO. SVM-06006 6. CONTROL BLOCK DIAGRAM 6-1. RAS-18UFHP-E5, RAS-24UFHP-E5 Indoor Unit Control Panel M.C.U. 8 MHz Hi POWER Functions Heat Exchanger Sensor Display • Louver Control FILTER Sign • 3-minute Delay at Restart for Compressor Temperature Sensor Display • Motor Revolution Control PRE DEF.

  • Page 22: Ras-18Ufp-E5, Ras-B18Ufpx

    FILE NO. SVM-06006 6-2. RAS-18UFP-E5, RAS-B18UFPX5, RAS-24UFP-E5, RAS-24UFPX5 Indoor Unit Control Panel M.C.U. 8 MHz Hi POWER Functions Heat Exchanger Sensor Display • Louver Control FILTER Sign • 3-minute Delay at Restart for Compressor Temperature Sensor Display • Motor Revolution Control FAN-ONLY Infrared Rays Signal Receiver Sign Display...

  • Page 23: Operation Description

    FILE NO. SVM-06006 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 24: Description Of Operation Circuit

    FILE NO. SVM-06006 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 25 FILE NO. SVM-06006 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 26: Cooling 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-18UFHP-E5 RAS-18UFP-E5, RAS-B18UFPX5, RAS-24UFHP-E5 RAS-24UFP-E5, RAS-24UFPX5 Table 7-2-1 Fig. 7-2-9 speed Starting period Stabilized period • Up until 12 minutes •...
  • Page 27 FILE NO. SVM-06006 7-3. Hi PO WER Mode 7-4. High-Temperature Limit Control ([Hi PO WER] b utton on the remote *Heat pump model only 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-06006 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-06006 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-06006 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-06006 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 air conditioner is turned off, the internal fan activates and dries the moisture in the coil for 20 minutes, then it turns off automatically.

  • Page 32: Quiet Mode

    FILE NO. SVM-06006 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-06006 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, service agency will take adequate countermeasures.

  • Page 35: Installation Diagram Of Indoor And Outdoor Units

    FILE NO. SVM-06006 8-2. Installation Diagram of Indoor and Outdoor Units For installation of the indoor unit, use the paper pattern, which is inside the package box cover. (Under Ceiling Installation) (Console Installation) Hook Installation plate Pipe shield Mounting screw Before install the wireless remote control Wireless remote...
  • Page 36 FILE NO. SVM-06006 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 Class) Gas side each : ∅15.88 mm (24 Class) Pipe insulating material (polyethylene foam, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit>...
  • Page 37 FILE NO. SVM-06006 8-3-2. Accessory and installation parts Part Part Part Part name (Q'ty) Part name (Q'ty) Part name (Q'ty) Pan head wood screw ∅3.1 x 16 s x 2 Installation plate x 1 Filter frame x 2 Wireless remote control x 1 Sasa-Zeolite Vitamin C filter x 1 Drain nipple* x 1 (For Heat pump model only)

  • Page 38: Indoor Unit

    FILE NO. SVM-06006 8-4. Indoor Unit <Remote control usage> • Under Ceiling Installation 8-4-1. Installation place • A place which provides the spaces around the Ceiling indoor unit as shown in the above diagram. • A place where there is no obstacle near the air inlet and outlet.
  • Page 39 FILE NO. SVM-06006 8-4-2. Before installation 8-4-3. After installation <Remove the Air inlet grille> <Install the Air inlet grille> 1. Open the Air inlet grille with both hands. 1. Insert the three Panel arms on the Air inlet grille and 2.
  • Page 40 FILE NO. SVM-06006 8-4-4. Under ceiling installation <Install the indoor unit> 1. Remove the Side covers and the Installation plate For the installation of the indoor unit, use the Paper pattern, which is inside the package box cover. 2. Insert the Suspension bolts into the metal fittings of <Install the Suspension bolts>...
  • Page 41 FILE NO. SVM-06006 • Rear side piping with Drain hose. (Recommended <Piping and Drain hose installation> direction) • The piping direction can be 4 ways as illustrated. • The Drain hose is only one way. Ceiling Upper piping 175 mm or more Rear piping hole ∅80 140 mm...
  • Page 42 FILE NO. SVM-06006 8-4-5. Console installation <Install the indoor unit> • Install the Installation plate 1 at the wall according to • Select the terminal of Selector-SW from [C position] to the Paper pattern . [F position]. • Hang the indoor unit on the hooks of the Installation plate 1.
  • Page 43 FILE NO. SVM-06006 <Piping and Drain hose installation> 8-4-6. Wiring connection • The piping direction can be the following 3 ways with <How to connect the connecting cable> the Drain hose. Terminal cover • Each piping direction should be connected with the Screws Flexible pipe ".
  • Page 44 FILE NO. SVM-06006 8-4-7. Pipe shield for flare nut connection 8-4-8. Drainage 1. Run the Drain hose sloping downward. Joints in liquid and gas pipes of the indoor unit should be insulated with an attached Pipe shield #. NOTE: • The hole should be made at a slight downward slant <How to install the Pipe shield>...

  • Page 45: Outdoor Unit

    FILE NO. SVM-06006 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 46 FILE NO. SVM-06006 <Tightening connection> 8-5-3. Evacuating Align the centers of the connecting pipes and tighten After the piping has been connected to the indoor unit, the flare nut as far as possible with your fingers. Then you can perform the air purge together at once. tighten the nut with a spanner and torque wrench as shown in the figure.
  • Page 47 FILE NO. SVM-06006 8-5-4. Wiring connection TO CHARGE REFRIGERANT 1. Remove the electric parts cover from the outdoor 18 Class 24 Class unit. 2. Connect the connecting cable to the terminal as No need to charge 15 m or less 15 m or less identified with their respective matched numbers on refrigerant...
  • Page 48 FILE NO. SVM-06006 8-6. How to Set Remote Control Selector CAUTION Switch • Wrong wiring connection may cause some When two indoor units are installed in seperated electrical parts burn out. • rooms, there is no need to change the selector switch. Be sure to comply with local codes on running the wire from indoor unit to outdoor unit (size of wire and wiring method etc.)

  • Page 49: How To Use Drain Pump Kit Of Option

    FILE NO. SVM-06006 2. Set the remote control selector switch with the 8-7. How to Use Drain Pump Kit of Option remote control In the case of upward drainage from the unit (Under ceiling installation). It is necessary to use Drain pump [B] is indicated on the liquid crystal display when kit of option parts.
  • Page 50 FILE NO. SVM-06006 8-8. Others 8-8-1. Gas leak test Flare nut connections (Indoor unit) Flare nut connections (Outdoor unit) Valve stem cap connection Service port cap connection Valve stem cap connection Fig. 8-8-1 • Check the flare nut connections, valve stem cap connections and service port cap connections for gas leak with a leak detector or soap water.

  • Page 51: Troubleshooting Chart

    FILE NO. SVM-06006 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 52: Primary Judgement

    FILE NO. SVM-06006 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 53 FILE NO. SVM-06006 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 54 FILE NO. SVM-06006 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 55: How To Diagnose Faulty Parts

    FILE NO. SVM-06006 9-5. How to Diagnose Faulty Parts Operation Check item Conceivable principle cause [04 Serial signal error] Measure Item by symptoms Does outdoor unit operate? Connect crossover Are 1, 2 and 3 crossover wires properly. wires connected properly? Connect crossover Is connector properly.
  • Page 56 FILE NO. SVM-06006 [09 Other cycle error] (1) Does compressor operate? Does inner Check charged amount of refrigerant. overload relay Is compressor Check defective overload. (in compressor) turned off shortly? Check compressor. operate? Is TC sensor Failure Replace resistance value compressor.
  • Page 57 FILE NO. SVM-06006 [0C Indoor TA sensor error] Connect CN03 Is CN03 (TA sensor connector) 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] Connect CN01 Is CN01 (TC sensor connector) properly.
  • Page 58 FILE NO. SVM-06006 [19 outdoor TD sensor error] Connect connector Is TD sensor properly. connected properly? Is TD sensor resistance value Replace TD sensor. (50 kΩ at 25°C) normal? Indoor P.C. board is defective. Replace P.C. board. [1E Discharge temp. error] Is protective controller Are wires connected to Connect wires to...

  • Page 59: Troubleshooting For Indoor Unit

    FILE NO. SVM-06006 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> (1) Is the supply voltage normal? Conceivable principle (2) Is the connection to the AC output OK? cause (3) Are the connection of the primary side and the secondary side of the power transformer inserted into the P.C.
  • Page 60 FILE NO. SVM-06006 9-6-2. Only indoor fan motor does not operate. Shut off the power supply once. Turn the power supply. Does the fan stop in Control P.C. board is defective. Replace the P.C. board. no operating status? Start the operation with low fan setting in cool operation.
  • Page 61 FILE NO. SVM-06006 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> -Cooling only model- Turn on power supply. Refer to 9-6-1 Does OPERATION “Power can not be lamp blink?
  • Page 62 FILE NO. SVM-06006 <Inspection procedure> - Colling 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? Replace P.C.
  • Page 63 FILE NO. SVM-06006 <Inspection procedure) - Heating model - AC 70-100V Replace transformer outdoor P.C. board. − 62 −...
  • Page 64 FILE NO. SVM-06006 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 65: Troubleshooting For Wiring (Interconnect Cable And Serial Signal Wire)

    FILE NO. SVM-06006 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 66: Troubleshooting For P.c. Board

    FILE NO. SVM-06006 9-8. Troubleshooting for P.C. Board <Inspection procedure> (1) If the P.C. board is detective, check for 9-8-1. How to check indoor P.C. board disconnection, burn or discoloration of the copper <Cautions for handling P.C. board> foil pattern of the P.C. board. (2) The P.C.
  • Page 67 FILE NO. SVM-06006 Procedure Check points Causes If the above condition (No. 6) still 1. Check whether or not the 1. The temperature of the indoor continues, start the unit in the compressor operates. heat exchanger is extremely high. following condition. 2.
  • Page 68 FILE NO. SVM-06006 9-8-4. P.C. board layout Top View Bottom View – 67 –...

  • Page 69: Troubleshooting For Remote Control

    FILE NO. SVM-06006 9-9. 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 70: Parts Replacement

    FILE NO. SVM-06006 10. PARTS REPLACEMENT 10-1. Indoor Unit Part name Procedures Remarks Air Inlet grille <How to remove the Air inlet grille> 1) Stop the operation of the Air conditioner and turn off its main power supply. 2) Open the Air inlet grille with both hands. Air inlet grille 3) Unfasten 3 screws (about two to three rounds) for fixing the Panel arms.
  • Page 71 FILE NO. SVM-06006 Part name Procedures Remarks Front panel <How to remove the Front panel> 1) Remove the Air inlet grille. (1) 2) In case of the Drain hose is installed through the Front panel. : Remove the Drain band from the Front panel.
  • Page 72 FILE NO. SVM-06006 Part name Procedures Remarks Front panel 6) Remove both side hooks and remove the Hook Front panel by turn to air inlet part direction. <How to install the Front panel> 1) In case of the Drain hose installation through the Front panel, install the opening base for piping in the Back body by a screw (M4 x 12).
  • Page 73 FILE NO. SVM-06006 Part name Procedures Remarks Drain pan Screw 7) Remove 7 screws and remove the Drain assembly pan assembly. Drain Pan Screw Electrical parts <How to remove the Electrical parts assembly> assembly 1) Remove the Air inlet grille, the Front panel and the Drain pan assembly.
  • Page 74 FILE NO. SVM-06006 Part name Procedures Remarks Refrigeration Earth wire TC sensor <How to remove the Refrigeration assembly> Pipe holder assembly 1) Remove the Air inlet grille, the Front panel and the Drain pan assembly. (1, 2, 3) 2) Stop the gas at the Outdoor unit. 3) Remove 2 pipes from the Refrigeration assembly.

  • Page 75: Outdoor Unit (Ras-24Nah-E, Ras-24Na-E, Ras-24N2Ax)

    FILE NO. SVM-06006 10-2. Outdoor Unit (RAS-24NAH-E, 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 76 FILE NO. SVM-06006 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 77 FILE NO. SVM-06006 10-3. Outdoor Unit (RAS-18NAH-E, RAS-18NA-E, RAS-18N2AX) Part name Procedures Remarks Common 1) Stop the operation of the air conditioner and turn off 3 screws ∅ 4 x 10L procedure its main power supply or remove the power supply cord.

  • Page 78: Exploded Views And Parts List

    43T69314 PC Board 43T62003 Cord clamp 43T08349 Switch cover Note: Location No.401 and N0.407 43T69311 used for these models: RAS-24UFHP-E5 43T69312 used for these models: RAS-24UFP-E5, RAS-24UFPX5 43T69313 used for these models: RAS-18UFHP-E5 43T69314 used for these models: RAS-18UFP-E5, RAS-B18UFPX5...
  • Page 79 FILE NO. SVM-06006 11-2. Indoor Unit Location Part Location Part Description Description 43T09379 AIR-GRILLE 43T03339 BACK BODY ASSY 43T00357 PANEL ARM ASSY 43T09314 VERTICAL LOUVER 43T00431 FRONT PANEL ASSY 43T49303 PIPE HOLDER (FOR Heat pump model) 43T19324 COVER BODY L 43T00432 FRONT PANEL ASSY 43T19325...
  • Page 80 FILE NO. SVM-06006 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 81 FILE NO. SVM-06006 11-4. 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;...
  • Page 82 FILE NO. SVM-06006 11-5. Outdoor Unit (RAS-24NAH-E) Location Part Location Part Description Description 43T42324 BASE PLATE ASSEMBLY 43T39318 MOTOR BASE 43T41370 COMPRESSOR(Made in China) 43T19330 PACKED VALVE COVER 43T49011 BASE; SPRING; A 43T00455 UPPER CABINET 43T49012 BASE;SPRING; B 43T96304 BUSHING 43T49019 SPRING;...
  • Page 83 FILE NO. SVM-06006 11-6. 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 84 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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