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Toshiba RAS-18UFHP-E4 Service Manual
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Toshiba RAS-18UFHP-E4 Service Manual

Toshiba RAS-18UFHP-E4 Service Manual

Under ceiling/console type
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SERVICE MANUAL

AIR-CONDITIONER
UNDER CEILING / CONSOLE TYPE
RAS-18UFHP-E4 / RAS-18UAH-E4
RAS-18UFP-E4 / RAS-18UA-E4
RAS-18UFPX4 / RAS-18UAX4
RAS-18UFP-AR4 / RAS-18UA-AR4
RAS-18UFPX4-T2 / RAS-18UAX4-T2
RAS-24UFHP-E4 / RAS-24UAH-E4
RAS-24UFP-E4 / RAS-24UA-E4
RAS-24UFPX4 / RAS-24UAX4
RAS-24UFP-AR4 / RAS-24UA-AR4
18 Class
(Heat pump model)
FILE NO. SVM-05015
18 Class
(Cooling only model)
24 Class
May, 2005

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Summary of Contents for Toshiba RAS-18UFHP-E4

  • Page 1: Service Manual

    FILE NO. SVM-05015 SERVICE MANUAL AIR-CONDITIONER UNDER CEILING / CONSOLE TYPE RAS-18UFHP-E4 / RAS-18UAH-E4 RAS-18UFP-E4 / RAS-18UA-E4 RAS-18UFPX4 / RAS-18UAX4 RAS-18UFP-AR4 / RAS-18UA-AR4 RAS-18UFPX4-T2 / RAS-18UAX4-T2 RAS-24UFHP-E4 / RAS-24UAH-E4 RAS-24UFP-E4 / RAS-24UA-E4 RAS-24UFPX4 / RAS-24UAX4 RAS-24UFP-AR4 / RAS-24UA-AR4 18 Class...

  • Page 2: Table Of Contents

    Indoor Unit Outdoor Unit (RAS-24UAH-E4, RAS-24UA-E4, RAS-24UAX4, RAS-24UA-AR4) RAS-18AX4-T2) Outdoor Unit (RAS-18UAH-E4) Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4) 3. WIRING DIAGRAM RAS-18UFHP-E4 / RAS-18UAH-E4 RAS-18UFP-E4 / RAS-18UA-E4, RAS-18UFPX4 / RAS-18UAX4 RAS-18UFP-AR4 / RAS-18UA-AR4 RAS-18UFPX4-T2 / RAS-18UAX4-T2 RAS-24UFHP-E4 / RAS-24UAH-E4 RAS-24UFP-E4 / RAS-24UA-E4...
  • Page 3 FILE NO. SVM-05015 6. CONTROL BLOCK DIAGRAM 6-1 RAS-18UFHP-E4, RAS-24UFHP-E4 6-2 RAS-18UFP-E4, RAS-18UFPX4, RAS-18UFP-AR4, RAS-18UFPX4-T2 RAS-24UFP-E4, RAS-24UFPX4, RAS-24UFP-AR4 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...
  • Page 4 FILE NO. SVM-05015 11. EXPLODED VIEWS AND PARTS LIST 11-1 Indoor Unit (E-Parts Assy) 11-2 Indoor Unit 11-3 Outdoor Unit (RAS-18-UAH-E4) 11-4 Outdoor Unit (RAS-18UA-E4, RAS-18UAX4) 11-5 Indoor Unit (RAS-18UA-AR4) 11-6 Outdoor Unit (RAS-18UAX4-T2) 11-7 Outdoor Unit (RAS-24UAH-E4) 11-8 Outdoor Unit (RAS-24UA-E4, RAS-24UAX4) 11-9 Outdoor Unit (RAS-24UA-AR4) −...

  • Page 5: Specifications

    FILE NO. SVM-05015 1. SPECIFICATIONS RAS-18UFP-E4/18UA-E4 MODEL RAS-18UFHP-E4/18UAH-E4 RAS-18UFP-AR4/18UA-AR4 RAS-18UFPX4-T2/18UAX4-T2 ITEM RAS-18UFPX4/18UAX4 Cooling Heating Cooling Capacity 220V 240V 220V 240V 220V 240V 220V 240V 220V 5.00 5.70 5.80 5.20 5.25 5.35 5.35 5.10 Phase 1∅ Power source 220 – 240...
  • Page 6 FILE NO. SVM-05015 MODEL RAS-24UFP-E4/24UA-E4 RAS-24UFP-AR4/ RAS-24UFHP-E4/24UAH-E4 RAS-24UFPX4/24UAX4 24UA-AR4 ITEM Cooling Heating Cooling Capacity 220V 240V 220V 240V 220V 240V 220V 240V 6.10 6.20 6.80 6.90 6.10 6.20 6.10 6.20 Phase 1∅ Power source 220 – 240 Power consumption 2480 2650 2490 2670...
  • Page 7 7°C Outdoor unit inlet air temperature (WB) 24°C 6°C Note : 2 • Charge refrigerant according to the table below. RAS-18UFHP-E4 / RAS-18UAH-E4 RAS-24UFHP-E4 / RAS-24UAH-E4 RAS-18UFP-E4 / RAS-18UA-E4 RAS-24UFP-E4 / RAS-24UA-E4 Refrigerant RAS-18UFPX4 / RAS-18UAX4 RAS-24UFPX4 / RAS-24UAX4 RAS-18UFP-AR4 / RAS-18UA-AR4...

  • Page 8: Construction Views

    FILE NO. SVM-05015 2. CONSTRUCTION VIEWS 2-1. Indoor Unit Front panel 1093 Knock out system Grille air inlet Back Body 200 Min 1093 For stud bolt Installation plate (∅8 - ∅10) 1015 For stud bolt (∅6) Mount plate M10 Suspention bolt Wireless remote control Knock out system UNDER CEILING &...

  • Page 9: Outdoor Unit (Ras-24Uah-E4, Ras-24Ua-E4, Ras-24Uax4, Ras-24Ua-Ar4)

    FILE NO. SVM-05015 2-2. Outdoor Unit (RAS-24UAH-E4, RAS-24UA-E4, RAS-24UAX4, RAS-24UA-AR4, RAS-18UAX4-T2) – 8 –...

  • Page 10: Outdoor Unit (Ras-18Uah-E4)

    FILE NO. SVM-05015 2-3. Outdoor Unit (RAS-18UAH-E4) – 9 –...

  • Page 11: Outdoor Unit (Ras-18Ua-E4, Ras-18Uax4, Ras-18Ua-Ar4)

    FILE NO. SVM-05015 2-4. Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4) 32.5 A Detail Drawing (Back Leg) B Detail Drawing (Front Leg) ∅6 Hole ∅6 Hole ∅11x14 Hole R5.5 ∅30 Drain outlet 2-∅11x14 Hole (For ∅8-∅10 anchor bolt) FAN GUARD ∅436 COVER PV Electrical part cover Liquid side...

  • Page 12: Wiring Diagram

    FILE NO. SVM-05015 3. WIRING DIAGRAM 3-1. RAS-18UFHP-E4 / RAS-18UAH-E4 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...

  • Page 13: Ras-18Ufp-E4 / Ras-18Ua-E4, Ras-18Ufpx4 / Ras-18Uax4

    FILE NO. SVM-05015 3-2. RAS-18UFP-E4 / RAS-18UA-E4, RAS-18UFPX4 / RAS-18UAX4 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: Ras-18Ufp-Ar4 / Ras-18Ua-Ar4

    FILE NO. SVM-05015 3-3. RAS-18UFP-AR4 / RAS-18UA-AR4 INFRARED RA YS RECEIVE AND INDICA TION P ARTS LOUVER 1 2 3 4 5 6 7 8 9 MOTOR CN25 1 2 3 4 5 6 7 8 9 COLOR IDENTIFICA TION 6 5 4 3 2 1 1 2 3...

  • Page 15: Ras-18Ufpx4-T2 / Ras-18Uax4-T2

    FILE NO. SVM-05015 3-4. RAS-18UFPX4-T2 / RAS-18UAX4-T2 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 7 8 9...

  • Page 16: Ras-24Ufhp-E4 / Ras-24Uah-E4

    FILE NO. SVM-05015 3-5. RAS-24UFHP-E4 / RAS-24UAH-E4 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 7 8 9...

  • Page 17: Ras-24Ufp-E4 / Ras-24Ua-E4

    FILE NO. SVM-05015 3-6. RAS-24UFP-E4 / RAS-24UA-E4 RAS-24UFPX4 / RAS-24UAX4 RAS-24UFP-AR4 / RAS-24UA-AR4 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 18: Specification Of Electrical Parts

    FILE NO. SVM-05015 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 19: Outdoor Unit (Ras-18Uax4, Ras-18Ua-E4)

    FILE NO. SVM-05015 4-4. Outdoor Unit (RAS-18UAX4, RAS-18UA-E4) 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 20: Outdoor Unit (Ras-24Uah-E4)

    FILE NO. SVM-05015 4-7. Outdoor Unit (RAS-24UAH-E4) Parts name Type Specifications Output (Rated) 2200 W, 2 poles, 1 phase, 220 – 240 V, 50 Hz Compressor 2JS386D5BB02 Winding resistance (Ω) (at 20°C) 0.886 1.979 Output (Rated) 65 W, 6 poles, 1 phase, 220 – 240 V, 50 Hz Fan motor (for outdoor) KFG6-71SB5P-T1 Winding resistance (Ω) Red-Black...

  • Page 21: Outdoor Unit (Ras-24Ua-Ar4)

    FILE NO. SVM-05015 4-9. Outdoor Unit (RAS-24UA-AR4) Parts name Type Specifications Output (Rated) 2200 W, 2 poles, 1 phase, 220 − 240 V, 50 Hz Compressor Winding resistance (Ω ) PH400X3CS-4KTS1 (at 20 °C) 2.32 1.01 Output (Rated) 65 W, 6 poles, 1 phase, 220 − 240 V, 50 Hz Fan motor (for outdoor) Winding resistance (Ω...

  • Page 22: Refrigeration Cycle Diagram

    FILE NO. SVM-05015 5. REFRIGERATION CYCLE DIAGRAM 5-1. RAS-18UFHP-E4 / RAS-18UAH-E4 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)

  • Page 23: Ras-18Ufp-E4 / Ras-18Ua-E4

    FILE NO. SVM-05015 5-2. RAS-18UFP-E4 / RAS-18UA-E4 RAS-18UFPX4 / RAS-18UAX4 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 ∅2.0x1400S...

  • Page 24: Ras-18Ufp-Ar4 / Ras-18Ua-Ar4

    FILE NO. SVM-05015 5-3. RAS-18UFP-AR4 / RAS-18UA-AR4 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 ∅2.0x1000S Capillary tube Accumulator...

  • Page 25: Ras-18Ufpx4-T2 / Ras-18Uax4-T2

    FILE NO. SVM-05015 5-4. RAS-18UFPX4-T2 / RAS-18UAX4-T2 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) Accumulator Capillary tube ∅2.0x800S Compressor PH290X2C-4FT1 Condenser...

  • Page 26: Ras-24Ufhp-E4 / Ras-24Uah-E4

    FILE NO. SVM-05015 5-5. RAS-24UFHP-E4 / RAS-24UAH-E4 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) Heating Cooling 4-way valve...

  • Page 27: Ras-24Ufp-E4 / Ras-24Ua-E4

    FILE NO. SVM-05015 5-6. RAS-24UFP-E4 / RAS-24UA-E4 RAS-24UFPX4 / RAS-24UAX4 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 28: Ras-24Ufp-Ar4 / Ras-24Ua-Ar4

    FILE NO. SVM-05015 5-7. RAS-24UFP-AR4 / RAS-24UA-AR4 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 ) Accumulator Capillary tube ∅2.4x1400S Compressor...

  • Page 29: Control Block Diagram

    FILE NO. SVM-05015 6. CONTROL BLOCK DIAGRAM 6-1. RAS-18UFHP-E4, RAS-24UFHP-E4 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 30: Ras-24Ufp-E4, Ras-24Ufpx4, Ras-24Ufp-Ar

    FILE NO. SVM-05015 6-2. RAS-18UFP-E4, RAS-18UFPX4, RAS-18UFP-AR4, RAS-18UFPX3-T2, RAS-24UFP-E4, RAS-24UFPX4, RAS-24UFP-AR4 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 •...

  • Page 31: Operation Description

    FILE NO. SVM-05015 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 32: Description Of Operation Circuit

    FILE NO. SVM-05015 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 33 FILE NO. SVM-05015 7-2-4. Heating operation *Heat pump model only 7-2-3. Dry operation ([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 34: 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-18UFP-E4, RAS-18UFPX4, RAS-18UFHP-E4 RAS-18UFPX4-T2, RAS-18UFP-AR4, RAS-24UFHP-E4 RAS-24UFP-E4, RAS-24UFPX4, Table 7-2-1 RAS-24UFP-AR4 Fig. 7-2-9 speed...
  • Page 35 FILE NO. SVM-05015 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 36 FILE NO. SVM-05015 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 37: Auto Restart Function

    FILE NO. SVM-05015 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 38: Filter Check Lamp

    FILE NO. SVM-05015 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 39: Self-Cleaning Function

    FILE NO. SVM-05015 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 40: Quiet Mode

    FILE NO. SVM-05015 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 41: 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 42 FILE NO. SVM-05015 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 43: Installation Diagram Of Indoor And Outdoor Units

    FILE NO. SVM-05015 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 44 FILE NO. SVM-05015 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-18UF) Gas side each : ∅15.88 mm (RAS-24UF, RAS-18UFPX4-T2) Pipe insulating material (polyethylene foam, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit>...
  • Page 45 FILE NO. SVM-05015 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 Drain nipple x 1 (Packaged with Wireless remote control x 1 Bio-enzyme &...

  • Page 46: Indoor Unit

    FILE NO. SVM-05015 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 47 FILE NO. SVM-05015 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 48 FILE NO. SVM-05015 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 49 FILE NO. SVM-05015 • 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 50 FILE NO. SVM-05015 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 51 FILE NO. SVM-05015 <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 52 FILE NO. SVM-05015 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 53: Outdoor Unit

    FILE NO. SVM-05015 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. Roughness Obliquity Warp 90°...
  • Page 54 FILE NO. SVM-05015 <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 55 FILE NO. SVM-05015 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 56 FILE NO. SVM-05015 8-6. How to Set Remote Control Selector RAS-18UFPX4-T2 / 18UAX4-T2 RAS-24UFPX4-T / 24UAX4-T Power source 50 Hz, 220 V Single phase Switch Maximum running When two indoor units are installed in seperated current rooms, there is no need to change the selector switch. Plug socket &...

  • Page 57: How To Use Drain Pump Kit Of Option

    FILE NO. SVM-05015 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 58 FILE NO. SVM-05015 8-8. Others 8-8-1. Gas leak test Electric parts cover Flare nut connections (Indoor unit) Valve stem cap connection Flare nut connections (Outdoor unit) Service 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 59: Troubleshooting Chart

    FILE NO. SVM-05015 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 60: Primary Judgement

    FILE NO. SVM-05015 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 61 FILE NO. SVM-05015 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 62 FILE NO. SVM-05015 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 63: How To Diagnose Faulty Parts

    FILE NO. SVM-05015 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 64 FILE NO. SVM-05015 [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 65 FILE NO. SVM-05015 [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 66 FILE NO. SVM-05015 [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 67: Troubleshooting For Indoor Unit

    FILE NO. SVM-05015 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 68 FILE NO. SVM-05015 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 69 FILE NO. SVM-05015 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 70 FILE NO. SVM-05015 <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 71 FILE NO. SVM-05015 <Inspection procedure) - Heating model - AC 70-100V Replace transformer outdoor P.C. board. − 70 −...
  • Page 72 FILE NO. SVM-05015 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 73: Troubleshooting For Wiring (Interconnect Cable And Serial Signal Wire)

    FILE NO. SVM-05015 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 74: Troubleshooting For P.c. Board

    FILE NO. SVM-05015 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 75 FILE NO. SVM-05015 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 76 FILE NO. SVM-05015 9-8-4. P.C. board layout Top View Bottom View – 75 –...

  • Page 77: Troubleshooting For Remote Control

    FILE NO. SVM-05015 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 78: Parts Replacement

    FILE NO. SVM-05015 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 79 FILE NO. SVM-05015 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 80 FILE NO. SVM-05015 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 81 FILE NO. SVM-05015 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 82 FILE NO. SVM-05015 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 83: Outdoor Unit (Ras-24Uah-E4, Ras-24Ua-E4, Ras-24Uax4, Ras-24Ua-Ar)

    FILE NO. SVM-05015 10-2. Outdoor Unit (RAS-24UAH-E4, RAS-24UA-E4, RAS-24UAX4, RAS-24UA-AR4, RAS-18UAX4-T2) Part name Procedures Remarks Common 1) Stop the operation of the air conditioner and turn off Top cabinet procedure its main power supply or remove the power supply Electrical cord.
  • Page 84 FILE NO. SVM-05015 10-3 Outdoor Unit (RAS-18UAH-E4) Part name Procedures Remarks Common 1) Stop the operation of the air conditioner and turn off procedure its main power supply or remove the power supply cord. 2) Remove the electrical parts cover. (4 screws ∅...
  • Page 85 FILE NO. SVM-05015 10-4 Outdoor Unit (RAS-18UA-E4, RAS-18UAX4, RAS-18UA-AR4) Part name Procedures Remarks Common 1) Stop the operation of the air conditioner and turn off procedure its main power supply or remove the power supply Electric cord. parts cover 2) Remove the packed valved cover and the electrical (3 screws ∅...

  • Page 86: Exploded Views And Parts List

    43T69311 used for these models: RAS-24UFHP-E4, RAS-24UFHP-E4, RAS-24UFHP-ES4 43T69312 used for these models: RAS-24UFP-E4, RAS-24UFPX-E4, RAS-24UFP-AR4, RAS-24UFP-ES4, RAS-24UFP-E4, RAS-18UFPX4-T2 43T69313 used for these models: RAS-18UFHP-E4, RAS-18UFHP-E4, RAS-18UFHP-ES4 43T69314 used for these models: RAS-18UFP-E4, RAS-18UFPX4, RAS-18UFP-AR4, RAS-18UFP-ES4, RAS-18UFP-E4 – 85 –...
  • Page 87 FILE NO. SVM-05015 11-2. Indoor Unit Location Part Location Part Description Description 43T09312 AIR GRILLE 43T49303 PIPE HOLDER 43T00357 PANEL ARM ASSY 43T19304 COVER BODY L (FOR Heat pump model) 43T19305 COVER BODY R 43T00361 PANEL ARM ASSY 43T19306 COVER BODY LD (FOR Cooling model) 43T19307 BUSH BODY-R...
  • Page 88 FILE NO. SVM-05015 11-3. Outdoor Unit (RAS-18UAH-E4) Location Part Location Part Description Description 43005144 CABINET; FRONT 43T49309 RUBBER-CUSHION (RUBBER GROMME 43T00005 CABINET;BACK 43T55322 MF CAPACITOR (45uF 440V) 43T00004 CABINET;SIDE 43T55324 CAPACITOR; PLASTIC-FILM 43T42306 BASE 43T60324 TERMINAL BLOCK;6P 43T00011 PLATE;PACKED;VALVE 43T41341 COMPRESSOR;...
  • Page 89 FILE NO. SVM-05015 11-4. Outdoor Unit (RAS -18UA-E4, RAS-18UAX4) Location Part Location Part Description Description 43T00368 FRONT CABINET ASSEMBLY 43T63303 FIXING PLATE VALVE 43T03308 BACK CABINET ASSEMBLY 43T47013 CAPILLARY TUBE; 2.0 DIA 43T42317 BASE COAT ASSEMBLY 43T41371 COMPRESSOR;PH340X3C-4KT1 43T09318 GUARD FAN 43T47324 BOLT COMPRESSOR (M6) 43T62311...
  • Page 90 FILE NO. SVM-05015 11-5. Outdoor Unit (RAS -18UA-AR4) Location Part Location Part Description Description 43T00368 FRONT CABINET ASSEMBLY 43T63303 FIXING PLATE VALVE 43T03308 BACK CABINET ASSEMBLY 43T47013 CAPILLARY TUBE; 2.0 DIA 43T42317 BASE COAT ASSEMBLY 43T41372 COMPRESSOR;PH340X3C-4KTS1 43T09318 GUARD FAN 43T47324 BOLT COMPRESSOR (M6) 43T62311...
  • Page 91 FILE NO. SVM-05015 11-6. Outdoor Unit (RAS -18UAX4-T2) Location Part Location Part Description Description 43T00024 PANEL; AIR OUTLET 43T41369 COMPRESSOR (PH290X2C-4FT1) 43T00025 PANEL; FRONT 43T62014 PROTECTOR; CORD 43T00026 PANEL;SIDE 43T62015 PROTECTOR; CORD 43T42316 BASE ASSY 43T49008 CUSHION,RUBBER 43T19320 GUARD; FIN 43T21314 MOTOR FAN;...
  • Page 92 FILE NO. SVM-05015 11-7. Outdoor Unit (RAS-24UAH-E4) Location Part Location Part Description Description 43T00024 PANEL; AIR OUTLET 43T21315 MOTOR; FAN; AC220-240V 50 HZ 43T00025 PANEL; FRONT 43T20301 FAN;PROPELLER;PP491 43T00026 PANEL;SIDE 43T96001 BUSHING 43T42307 BASE ASSY 43T96004 BUSHING; CORD 43T19320 GUARD; FIN 43T62013 COVER;...
  • Page 93 FILE NO. SVM-05015 11-8. Outdoor Unit (RAS-24UA-E4, RAS-24UAX4) Location Part Location Part Description Description 43T00024 PANEL; AIR OUTLET 43T62014 PROTECTOR; CORD 43T00025 PANEL; FRONT 43T62015 PROTECTOR; CORD 43T00026 PANEL;SIDE 43T49316 RUBBER-CUSHION 43T42316 BASE ASSY 43T21314 MOTOR FAN; AC220-240V 50Hz 43T19320 GUARD;...
  • Page 94 FILE NO. SVM-05015 11-9. Outdoor Unit (RAS -24UA-AR4) Location Part Location Part Description Description 43T00024 PANEL; AIR OUTLET 43T62014 PROTECTOR; CORD 43T00025 PANEL; FRONT 43T62015 PROTECTOR; CORD 43T00026 PANEL;SIDE 43T49316 RUBBER-CUSHION 43T42316 BASE ASSY 43T21316 MOTOR FAN; AC220-240V 50HZ 43T19320 GUARD;...
  • Page 95 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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