Toshiba RAS-24GKHP-ES2 Service Manual
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Toshiba RAS-24GKHP-ES2 Service Manual

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FILE NO. SVM-06020

SERVICE MANUAL

AIR CONDITIONER

SPLIT WALL TYPE
RAS-18GKHP-ES2 / RAS-18GAH-ES2
RAS-24GKP-ES2 / RAS-24GA-ES2
RAS-18GKP-ES2 / RAS-18GA-ES2
18 Class
24 Class
May, 2006

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Summary of Contents for Toshiba RAS-24GKHP-ES2

  • Page 1: Service Manual

    FILE NO. SVM-06020 SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE RAS-18GKHP-ES2 / RAS-18GAH-ES2 RAS-24GKP-ES2 / RAS-24GA-ES2 RAS-18GKP-ES2 / RAS-18GA-ES2 18 Class 24 Class May, 2006...

  • Page 2: Table Of Contents

    WIRING DIAGRAM RAS-24GKHP-ES2 / RAS-24GAH-ES2 RAS-18GKHP-ES2 / RAS-18GAH-ES2 RAS-24GKP-ES2 / RAS-24GA-ES2 RAS-18GKP-ES2 / RAS-18GA-ES2 SPECIFICATION OF ELECTRICAL PARTS Indoor Unit (RAS-24GKHP-ES2, RAS-18GKHP-ES2) Outdoor Unit (RAS-24GAH-ES2) Outdoor Unit (RAS-18GAH-ES2) Indoor Unit (RAS-24GKP-ES2, RAS-18GKP-ES2) Outdoor Unit (RAS-24GA-ES2) Outdoor Unit (RAS-18GA-ES2) REFRIGERATION CYCLE DIAGRAM...
  • Page 3 FILE NO. SVM-06020 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-06020 1. SPECIFICATIONS RAS-24GKHP-ES2 RAS-24GKP-ES2 RAS-18GKHP-ES2 RAS-18GKP-ES2 MODEL RAS-24GAH-ES2 RAS-24GA-ES2 RAS-18GAH-ES2 RAS-18GA-ES2 ITEM Cooling Heating Cooling Cooling Heating Cooling 220V 240V 220V 240V 220V 240V 220V 240V 220V 240V 220V 240V Capacity 6.30 6.30 6.80 6.90 6.80 5.00 5.05 5.45 5.55 5.35...
  • Page 5 Outdoor unit inlet air temperature (WB) 24°C 6°C Note : 2 · Charge refrigerant according to the table below. Refrigerant RAS-24GKHP-ES2 / RAS-24GAH-ES2 RAS-18GKHP-ES2 / RAS-18GAH-ES2 RAS-24GKP-ES2 / RAS-24GA-ES2 RAS-18GKP-ES2 / RAS-18GA-ES2 No need to charge 15m or less 15m or less...

  • Page 6: Construction Views

    FILE NO. SVM-06020 2. CONSTRUCTION VIEWS 2-1. Indoor Unit Back body Front panel Air inlet Grille inlet Air outlet Knock out system Knock out system Drain hose (0.54 m) Connection pipe (0.39 m) Connection pipe (0.49 m) (Flare ∅15.88) Wireless remote control (Flare ∅6.35) 763.5 (For stud bolt ∅6)

  • Page 7: Outdoor Unit (24 Class)

    FILE NO. SVM-06020 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 8: Outdoor Unit (18 Class)

    FILE NO. SVM-06020 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 9: Wiring Diagram

    FILE NO. SVM-06020 3. WIRING DIAGRAM 3-1. RAS-24GKHP-ES2 / RAS-24GAH-ES2 COLOR IDENTIFICATION BRW : BROWN RED : RED WHI : WHITE YEL : YELLOW Louver BLU : BLUE motor Infrared rays receive BLK : BLACK and Indication parts GRY : GRAY...

  • Page 10: Ras-18Gkhp-Es2 / Ras-18Gah-Es2

    FILE NO. SVM-06020 3-2. RAS-18GKHP-ES2 / RAS-18GAH-ES2 COLOR IDENTIFICATION BRW : BROWN RED : RED WHI : WHITE YEL : YELLOW Louver motor BLU : BLUE Infrared rays receive BLK : BLACK and Indication parts GRY : GRAY 1 2 3 CN25 1 2 3 PNK : PINK...

  • Page 11: Ras-24Gkp-Es2 / Ras-24Ga-Es2

    FILE NO. SVM-06020 3-3. RAS-24GKP-ES2 / RAS-24GA-ES2 COLOR IDENTIFICATION BRW : BROWN RED : RED Louver motor WHI : WHITE Infrared rays receive YEL : YELLOW and Indication parts BLU : BLUE BLK : BLACK 7 8 9 CN25 GRY : GRAY 1 2 3 4 PNK : PINK ORN : ORANGE...

  • Page 12: Ras-18Gkp-Es2 / Ras-18Ga-Es2

    FILE NO. SVM-06020 3-4. RAS-18GKP-ES2 / RAS-184GA-ES2 COLOR IDENTIFICATION BRW : BROWN RED : RED Louver motor WHI : WHITE Infrared rays receive YEL : YELLOW and Indication parts BLU : BLUE BLK : BLACK 7 8 9 CN25 GRY : GRAY 1 2 3 4 PNK : PINK ORN : ORANGE...

  • Page 13: Specification Of Electrical Parts

    FILE NO. SVM-06020 4. SPECIFICATION OF ELECTRICAL PARTS 4-1. Indoor Unit (RAS-24GKHP-ES2, RAS-18GKHP-ES2) Parts name Type Specifications AC 200 − 240V, 31W Fan motor (for indoor) AFS-220-31-4A Thermo sensor (TA-sensor) ——— 10 kΩ at 25°C µRM1260V Micro Power Module (M01)

  • Page 14: Outdoor Unit (Ras-18Gah-Es2)

    FILE NO. SVM-06020 4-3. Outdoor Unit (RAS-18GAH-ES2) Parts name Type Specifications Output (Rated) 1500W, 2poles, 1 phase, 220 − 240V, 50Hz Compressor PA225X2CS-4KU1 Winding resistance (Ω) Red-Black White-Black (at 20°C) 1.54 2.48 Output (Rated) 42W, 4poles, 1 phase, 220 – 240V, 50Hz Fan motor (for outdoor) FG-240-42A-1 Winding resistance (Ω)

  • Page 15: Outdoor Unit (Ras-24Ga-Es2)

    FILE NO. SVM-06020 4-5. Outdoor Unit (RAS-24GA-ES2) Parts name Type Specifications Output (Rated) 2200W, 2poles, 1 phase, 220 − 240V, 50Hz Compressor PA290X3CS-4MU1 Winding resistance (Ω ) Red-Black White-Black (at 20°C) 1.13 2.10 Output (Rated) 42W, 4poles, 1 phase, 220 − 240V, 50Hz Fan motor (for outdoor) FG-240-42A Winding resistance (Ω)

  • Page 16: Refrigeration Cycle Diagram

    FILE NO. SVM-06020 5. REFRIGERATION CYCLE DIAGRAM 5-1. RAS-24GKHP-ES2 / RAS-24GAH-ES2 Indoor unit Heat exchanger Cooling 0.39m 0.49m Heating (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) Gas container connection (Reinstall etc.)

  • Page 17: Ras-18Gkhp-Es2 / Ras-18Gah-Es2

    FILE NO. SVM-06020 5-2. RAS-18GKHP-ES2 / RAS-18GAH-ES2 Indoor unit Evaporator Cooling 0.39m 0.49m Heating (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) Heating Cooling 4-way valve Heating Cooling Compressor PA225X2CS-4KU1 Capillary tube ∅2.0x1200s Accumulator Condenser...

  • Page 18: Ras-24Gkp-Es2 / Ras-24Ga-Es2

    FILE NO. SVM-06020 5-3. RAS-24GKP-ES2 / RAS-24GA-ES2 Indoor unit Heat exchanger Cooling 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) Gas container connection (Reinstall etc.) Cooling Accumulator Capillary tube Compressor PA290X3CS-4MU1 ∅2.0x900s...

  • Page 19: Ras-18Gkp-Es2 / Ras-18Ga-Es2

    FILE NO. SVM-06020 5-4. RAS-18GKP-ES2 / RAS-18GA-ES2 Indoor unit Evaporator Cooling 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) Cooling Compressor PA225X2CS-4KU1 Capillary tube ∅1.7x400s Condenser Refrigerant R410A 1.26 kg Propeller fan Outdoor unit Mark(...

  • Page 20: Control Block Diagram

    FILE NO. SVM-06020 6. CONTROL BLOCK DIAGRAM 6-1. RAS-24GKHP-ES2, RAS-18GKHP-ES2 Indoor Unit Control Panel M.C.U. Functions Operation Heat Exchanger Sensor • Louver Control Display Timer • 3-minute Delay at Restart for Compressor Temperature Sensor Display Filter Sign • Motor Revolution Control...

  • Page 21: Ras-24Gkp-Es2, Ras-18Gkp-Es2

    FILE NO. SVM-06020 6-2. RAS-24GKP-ES2, RAS-18GKP-ES2 Indoor Unit Control Panel M.C.U. Operation Functions Heat Exchanger Sensor Display Louver Control Timer Temperature Sensor 3-minute Delay at Restart for Compressor Display Filter Sign Infrared Rays Signal Receiver Motor Revolution Control Display Fan Only Initiallizing Circuit Processing Sign Display...

  • Page 22: Operation Description

    FILE NO. SVM-06020 7. OPERATION DESCRIPTION · Compressor operation 7-1. Outline of Air Conditioner Control Operations according This is a fixed capacity type air conditioner, which uses control to the commands · Operation control of a AC motor for an indoor fan. The AC motor drive from the indoor unit circuit is mounted in the indoor unit.

  • Page 23: Description Of Operation Circuit

    FILE NO. SVM-06020 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 24 FILE NO. SVM-06020 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 25: 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-24GKHP-ES2 RAS-24GKP-ES2 Table 7-2-1 RAS-18GKHP-ES2 RAS-18GKP-ES2 speed Starting period Stabilized period •...

  • Page 26: Hi Power Mode

    FILE NO. SVM-06020 7-3. Hi POWER Mode 7-4. High-Temperature Limit Control ([Hi POWER] button on the remote *Heat pump model only control is pressed.) The microcontroller detects the indoor heat exchanger temperature to prevent pressure of a refrigerating cycle When [Hi POWER] button is pressed while the indoor from increasing excessively.
  • Page 27 FILE NO. SVM-06020 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 28: Auto Restart Function

    FILE NO. SVM-06020 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 29: Filter Check Lamp

    FILE NO. SVM-06020 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 30: Self-Cleaning Function

    FILE NO. SVM-06020 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 31: Quiet Mode

    FILE NO. SVM-06020 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 32 FILE NO. SVM-06020 8-3-3. Installation/Servicing tools <Changes in the product and components> In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch) •...

  • Page 33: Installation Procedure

    FILE NO. SVM-06020 8. INSTALLATION PROCEDURE 8-1. Safety Cautions For general public use Power supply cord of Outdoor unit shall be more than 4 mm (H07RN-F or 245 IEC66 : polychloroprene sheathed flexible cord) or 3.5 mm (AWG-12). CAUTION New Refrigerant Air conditioner Installation •...
  • Page 34 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 35: Installation Diagram Of Indoor And Outdoor Units

    FILE NO. SVM-06020 8-2. Installation Diagram of Indoor and Outdoor Units For the rear left and left piping Wall Hook 1 Installation plate Insert the cushion between the indoor unit and wall, and lift the indoor unit for better operation. Do not allow the drain hose to get slack.

  • Page 36: Installation

    FILE NO. SVM-06020 8-3. Installation 8-3-1. Optional installation parts Part Parts name Q'ty Code Refrigerant piping Liquid side : ∅6.35 mm each : ∅12.7 mm Gas side Pipe insulating material (polyethylene foam, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit> 109 mm 124 mm Air inlet...
  • Page 37 F ILE NO. SV M-06020 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 Sasa Zeolite Vitamin C filter x 2 ∅...

  • Page 38: Indoor Unit

    FILE NO. SVM-06020 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 (See Fug 8-2). •...
  • Page 39 FILE NO. SVM-06020 <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-06020 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-06020 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-06020 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-06020 8-5. Outdoor Unit 8-5-2. Refrigerant piping connection 8-5-1. Installation place 1. Cut the pipe with a pipe cutter. • A place which provides the spaces around the outdoor unit as shown in the installation diagram of indoor and outdoor unit. Roughness Warp Obliquity...
  • Page 44 FILE NO. SVM-06020 (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 ∅9.52 mm 30 to 42 (3.0 to 4.2 kgf·m)
  • Page 45 FILE NO. SVM-06020 8-5-4. Wiring connection TO CHARGE REFRIGERANT 1. Remove the valve cover from the outdoor unit. Refrigerant 18 Class 24 Class 2. Connect the connecting cable to the terminal as No need to charge 15 m or les s 15 m or les s identified with their respective matched numbers on refrigerant...

  • Page 46: How To Set Remote Control Selector Switch

    FILE NO. SVM-06020 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-06020 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 it can restart automatically in the same operating mode as before the power failure. Flare nut connections (Indoor unit) Information The product was shipped with Auto Restart function...

  • Page 48: Troubleshooting Chart

    FILE NO. SVM-06020 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-06020 9-3-2. Failure diagnosis 9-3. Primary Judgement 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-06020 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-06020 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-06020 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-06020 [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-06020 [0C Indoor TA sensor error] Is CN04 (TA sensor connector) Connect CN04 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 CN05 (TC sensor connector) Connect CN05 properly.
  • Page 55 FILE NO. SVM-06020 [19 outdoor TD sensor error] (Heat pump model) Is TD sensor Connect connector 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-06020 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-06020 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-06020 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-06020 <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-06020 <Inspection procedure) - Heating model - AC 70-100V Replace transformer outdoor P.C. board. - 59 -...
  • Page 61 FILE NO. SVM-06020 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-06020 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 P.c. Board

    FILE NO. SVM-06020 9-8. Troubleshooting for P.C. board <Inspection procedure> (1) If the P.C. board is detective, check for disconnec- 9-8-1. 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 64 FILE NO. SVM-06020 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 65: Troubleshooting For Remote Control

    FILE NO. SVM-06020 9-9. Troubleshooting for Remote Control The unit does not beep at all. Press START/STOP 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 66: Part Replacement

    FILE NO. SVM-06020 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 67 FILE NO. SVM-06020 Part name Procedures Remarks Horizontal louver 1) Remove center 2 shafts of the horizontal grille from (1) Center shafts the back body. 2) Remove left shaft of the horizontal louver from the back body. (2) Left shafts 3) Remove the horizontal louver from the back body.

  • Page 68: Outdoor Unit (Ras-24Gah-Es2, Ras-24Ga-Es2)

    FILE NO. SVM-06020 10-2. Outdoor Unit (RAS-24GAH-ES2, RAS-24GA-ES2) 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 69 FILE NO. SVM-06020 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 70: Outdoor Unit (Ras-18Gah-Es2, Ras-18Ga-Es2)

    FILE NO. SVM-06020 10-3 Outdoor Unit (RAS-18GAH-ES2, RAS-18GA-ES2) 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 71: Exploded Views And Parts List

    FILE NO. SVM-06020 11. EXPLODED VIEWS AND PARTS LIST 11-1. Indoor Unit (E-Parts Assy) Location Part Location Part Description Description 43T60002 TERMINAL BLOCK; 3P 43T69527 PC BOARD (RAS-24GKHP) 43T50004 SENSOR; HEAT EXCHANGER 43T69528 PC BOARD (RAS-24GKP) 43T50314 SENSOR;THERMOSTAT 43T69529 PC BOARD (RAS-18GKHP) 43T69559 PC BOARD ASSY ;...

  • Page 72: Indoor Unit

    FILE NO. SVM-06020 11-2. Indoor Unit Location Part Location Part Description Description 43T00409 FRONT PANEL ASSY 43T49324 PLATE; EVA-SEAL 43T09386 GRILLE ASSY (18,24GKHP) 43T49039 HOLDER; PLATE EVA-SEAL 43T09388 GRILLE ASSY (18,24GKP) 43T49038 PLATE; EVA-SEAL 43T80306 AIR FILTER (L) 43T49037 HOLDER; PLATE EVA-SEAL 43T80312 AIR FILTER (R) 43T79007...

  • Page 73: Outdoor Unit (Ras-24Gah-Es2)

    FILE NO. SVM-06020 11-3. Outdoor Unit (RAS-24GAH-ES2) Location Part Location Part Description Description 43T42324 BASE PLATE ASSEMBLY 43T19330 PACKED VALVE COVER 43T41397 COMPRESSOR;PA290X3CS-4MU 43T00455 UPPER CABINET 43T49011 SPRING BASE(UPPER) 43T96305 BUSHING 43T49012 SPRING BASE (LOWER) 43T62325 ELECTRIC PART COVER 43T49019 SPRING;...

  • Page 74: Outdoor Unit (Ras-18Gah-Es2)

    FILE NO. SVM-06020 11-4. Outdoor Unit (RAS-18GAH-ES2) Location Part Location Part Description Description 43T42324 BASE PLATE ASSEMBLY 43T39317 MOTOR BASE CONNECTION PLATE 43T41396 COMPRESSOR;PA225X2C-4KU1 43T39318 MOTOR BASE 43T49011 SPRING BASE(UPPER) 43T19330 PACKED VALVE COVER 43T49012 SPRING BASE (LOWER) 43T00460 UPPER CABINER ASSEMBLY 43T49019 SPRING;...

  • Page 75: Outdoor Unit (Ras-24Ga-Es2)

    FILE NO. SVM-06020 11-5. Outdoor Unit (RAS-24GA-ES2) Location Part Location Part Description Description 43T42324 BASE PLATE ASSEMBLY 43T19329 FAN GUARD 43T41397 COMPRESSOR;PA290X3CS-4MU 43T04302 PARTITION 43T49011 SPRING BASE(UPPER) 43T39317 MOTOR BASE CONNECTION PLATE 43T49012 SPRING BASE (LOWER) 43T39318 MOTOR BASE 43T49019 SPRING;...

  • Page 76: Outdoor Unit (Ras-18Ga-Es2)

    FILE NO. SVM-06020 11-6. Outdoor Unit (RAS-18GA-ES2) Location Part Location Part Description Description 43T42324 BASE PLATE ASSEMBLY 43T47001 NUT FLANGE 43T41396 COMPRESSOR;PA225X2C-4KU1 43T19329 FAN GUARD 43T49011 SPRING BASE(UPPER) 43T04301 PARTITION 43T49012 SPRING BASE (LOWER) 43T39317 MOTOR BASE CONNECTION PLATE 43T49019 SPRING;...
  • Page 77 FILE NO. SVM-03009(1) TOSHIBA CARRIER (THAILAND) CO.,LTD. 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000,THAILAND. – 75 –...

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