Table of Contents
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SERVICE MANUAL
AIR-CONDITIONER
UNDER CEILING / CONSOLE TYPE
RAS-18UFHP-E / RAS-18UAH-E
RAS-18UFP-E / RAS-18UA-E
RAS-18UFPX / RAS-18UAX
RAS-18UFP-AR / RAS-18UA-AR
RAS-18UFPX-T2 / RAS-18UAX-T2
RAS-24UFHP-E / RAS-24UAH-E
RAS-24UFP-E / RAS-24UA-E
RAS-24UFPX / RAS-24UAX
RAS-24UFP-AR / RAS-24UA-AR
RAS-24UFPX-T / RAS-24UAX-T
FILE NO. SVM-02008
18 Class
24 Class
Mar., 2002
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Table of Contents
Troubleshooting
Related Manuals for Toshiba RAS-18UFHP-E
Summary of Contents for Toshiba RAS-18UFHP-E
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Page 1: Service Manual
FILE NO. SVM-02008 SERVICE MANUAL AIR-CONDITIONER UNDER CEILING / CONSOLE TYPE RAS-18UFHP-E / RAS-18UAH-E RAS-18UFP-E / RAS-18UA-E RAS-18UFPX / RAS-18UAX RAS-18UFP-AR / RAS-18UA-AR RAS-18UFPX-T2 / RAS-18UAX-T2 RAS-24UFHP-E / RAS-24UAH-E RAS-24UFP-E / RAS-24UA-E RAS-24UFPX / RAS-24UAX RAS-24UFP-AR / RAS-24UA-AR RAS-24UFPX-T / RAS-24UAX-T... -
Page 2: Table Of Contents
2-1 Indoor Unit 2-2 Outdoor Unit (RAS-18UAH-E, RAS-18UA-E, RAS-18UAX, RAS-18UA-AR) 2-3 Outdoor Unit (RAS-18UAX-T2, RAS-24UAH-E, RAS-24UA-E, RAS-24UAX, RAS-24UA-AR, RAS-24UAX-T) 3. WIRING DIAGRAM 3-1 RAS-18UFHP-E / RAS-18UAH-E 3-2 RAS-18UFP-E / RAS-18UA-E RAS-18UFPX / RAS-18UAX 3-3 RAS-18UFP-AR / RAS-18UA-AR 3-4 RAS-24UFHP-E / RAS-24UAH-E... - Page 3 FILE NO. SVM-02008 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 8.
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Page 4: Specifications
FILE NO. SVM-02008 1. SPECIFICATIONS RAS-18UFP-E/18UA-E MODEL RAS-18UFHP-E/18UAH-E RAS-18UFP-AR/18UA-AR RAS-18UFPX-T2/18UAX-T2 ITEM RAS-18UFPX/18UAX Cooling Heating Cooling Capacity 220V 240V 220V 240V 220V 240V 220V 240V 220V 5.00 5.70 5.80 5.20 5.35 5.15 Phase 1∅ Power source 220 – 240 Power consumption... - Page 5 FILE NO. SVM-02008 RAS-24UFP-E/24UA-E MODEL RAS-24UFHP-E/24UAH-E RAS-24UFPX/24UAX RAS-24UFPX-T/24UAX-T RAS-24UFP-AR/24UA-AR ITEM Cooling Heating Cooling Capacity 220V 240V 220V 240V 220V 240V 220V 6.10 6.20 6.80 6.90 6.10 6.20 6.10 Phase 1∅ Power source 220 – 240 Power consumption 2480 2650 2490 2670 2260 2400...
- Page 6 Outdoor unit inlet air temperature (WB) 24 °C 6 °C Note : 2 • Charge refrigerant according to the table below. RAS-18UFHP-E / RAS-18UAH-E RAS-24UFHP-E / RAS-24UAH-E RAS-18UFP-E / RAS-18UA-E RAS-24UFP-E / RAS-24UA-E Refrigerant RAS-18UFPX / RAS-18UAX RAS-24UFPX / RAS-24UAX...
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Page 7: Construction Views
FILE NO. SVM-02008 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 8: Outdoor Unit (Ras-18Uah-E, Ras-18Ua-E, Ras-18Uax, Ras-18Ua-Ar)
FILE NO. SVM-02008 2-2. Outdoor Unit (RAS-18UAH-E, RAS-18UA-E, RAS-18UAX, RAS-18UA-AR) ∅6 hole ∅11x14 hole A Detail Drawing 8-∅6 holes (For fixing outdoor unit) ∅25 Drain oulet 6-∅11x14 holes (For ∅8 - ∅10 anchor bolt) Fan guard Handle ∅420 Electric 100 or more Air inlet Parts cover 600 or more... -
Page 9: Outdoor Unit
FILE NO. SVM-02008 2-3. Outdoor Unit (RAS-18UAX-T2, RAS-24UAH-E, RAS-24UA-E, RAS-24UAX, RAS-24UA-AR, RAS-24UAX-T) ∅25 Drain outlet ∅12x18 hole A Detail Drawing 4-∅12x18 holes (for ∅8 - ∅10 anchor bolt) Handle Handle Electric Parts cover 100 or more 600 or more Liquid side (Flare ∅6.35) Gas side 100 or more... -
Page 10: Wiring Diagram
FILE NO. SVM-02008 3. WIRING DIAGRAM 3-1. RAS-18UFHP-E / RAS-18UAH-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... -
Page 11: Ras-18Ufp-E / Ras-18Ua-Eras-18Ufpx / Ras-18Uax
FILE NO. SVM-02008 3-2. RAS-18UFP-E / RAS-18UA-E RAS-18UFPX / RAS-18UAX 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: Ras-18Ufp-Ar / Ras-18Ua-Ar
FILE NO. SVM-02008 3-3. RAS-18UFP-AR / RAS-18UA-AR 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 13: Ras-24Ufhp-E / Ras-24Uah-E
FILE NO. SVM-02008 3-4. RAS-24UFHP-E / RAS-24UAH-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 7 8 9... -
Page 14: Ras-18Ufpx-T2 / Ras-18Uax-T2
FILE NO. SVM-02008 3-5. RAS-18UFPX-T2 / RAS-18UAX-T2 RAS-24UFP-E / RAS-24UA-E RAS-24UFPX / RAS-24UAX RAS-24UFP-AR / RAS-24UA-AR RAS-24UFPX-T / RAS-24UAX-T 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... -
Page 15: Specification Of Electrical Parts
FILE NO. SVM-02008 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 16: Outdoor Unit (Ras-18Ua-E, Ras-18Uax)
FILE NO. SVM-02008 4-3. Outdoor Unit (RAS-18UA-E, RAS-18UAX) Parts name Type Specifications Output (Rated) 1500W, 2poles, 1phase, 220 – 240V, 50Hz Compressor PH250X3-4LM Winding resistance (Ω) Red-Black White-Black (at 20°C) 1.22 2.29 Output (Rated) 42W, 6poles, 1phase, 220 – 240V, 50Hz Fan motor (for outdoor) HF-240-42A Winding resistance (Ω) -
Page 17: Outdoor Unit (Ras-24Uah-E)
FILE NO. SVM-02008 4-6. Outdoor Unit (RAS-24UAH-E) Parts name Type Specifications Output (Rated) 2200W, 2poles, 1 phase, 220 – 240V, 50Hz Compressor PH310X3-4MM Winding resistance (Ω) Red-Black White-Black (at 20°C) 2.16 Output (Rated) 51W, 6poles, 1phase, 220 – 240V, 50Hz Fan motor (for outdoor) KPG6-71SB5P-T1 Winding resistance (Ω) Red-Black... -
Page 18: Outdoor Unit (Ras-24Uax-T)
FILE NO. SVM-02008 4-8. Outdoor Unit (RAS-24UAX-T) Parts name Type Specifications Output (Rated) 2200W, 2poles, 1phase, 220 – 240V, 50Hz Compressor PH280X3-4MS Winding resistance (Ω) Red-Black Red-Black (at 20°C) 2.72 0.82 Output (Rated) 65W, 6poles, 1phase, 220 – 240V, 50Hz Fan motor (for outdoor) KRG6-71SB5P-T Winding resistance (Ω) Red-Black... -
Page 19: Refrigeration Cycle Diagram
FILE NO. SVM-02008 5. REFRIGERATION CYCLE DIAGRAM 5-1. RAS-18UFHP-E / RAS-18UAH-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) -
Page 20: Ras-18Ufp-E / Ras-18Ua-Eras-18Ufpx / Ras-18Uax
FILE NO. SVM-02008 5-2. RAS-18UFP-E / RAS-18UA-E RAS-18UFPX / RAS-18UAX Indoor unit Evaporator 0.49m 0.39m (Connecting pipe) (Connecting pipe) ∅6.35 mm ∅12.70 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 ∅2.4x1000S... -
Page 21: Ras-18Ufp-Ar / Ras-18Ua-Ar
FILE NO. SVM-02008 5-3. RAS-18UFP-AR / RAS-18UA-AR Indoor unit Evaporator 0.49m 0.39m (Connecting pipe) (Connecting pipe) ∅6.35 mm ∅12.70 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 ∅0.8x900S... -
Page 22: Ras-18Ufpx-T2 / Ras-18Uax-T2
FILE NO. SVM-02008 5-4. RAS-18UFPX-T2 / RAS-18UAX-T2 Indoor unit Evaporator 0.49m 0.39m (Connecting pipe) (Connecting pipe) ∅6.35 mm ∅15.88 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) Capillary tube ∅2.0x800S Compressor PH210T2-4L7... -
Page 23: Ras-24Ufhp-E / Ras-24Uah-E
FILE NO. SVM-02008 5-5. RAS-24UFHP-E / RAS-24UAH-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) Heating Cooling 4-way valve... -
Page 24: Ras-24Ufp-E / Ras-24Ua-Eras-24Ufpx / Ras-24Uax Ras-24Ufp-Ar / Ras-24Ua-Ar Ras-24Ufpx-T / Ras-24Uax-T
FILE NO. SVM-02008 5-6. RAS-24UFP-E / RAS-24UA-E RAS-24UFPX / RAS-24UAX RAS-24UFP-AR / RAS-24UA-AR RAS-24UFPX-T / RAS-24UAX-T Indoor unit Evaporator Cooling 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... -
Page 25: Control Block Diagram
FILE NO. SVM-02008 6. CONTROL BLOCK DIAGRAM 6-1. RAS-18UFHP-E, RAS-24UFHP-E 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 26: Ras-18Ufp-E, Ras-18Ufpx, Ras-18Ufp-Ar, Ras-18Ufpx-T2
FILE NO. SVM-02008 6-2. RAS-18UFP-E, RAS-18UFPX, RAS-18UFP-AR, RAS-18UFPX-T2 RAS-24UFP-E, RAS-24UFPX, RAS-24UFP-AR, RAS-24UFPX-T 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 27: Operation Description
• Receiving of information of the operation status Table 7-1-1 and judging of the information or indication of error. RAS-18UFHP-E RAS-24UFHP-E MODEL Motor speed Air flow level Motor speed Air flow level (2) Role of outdoor unit controller... -
Page 28: Description Of Operation Circuit
FILE NO. SVM-02008 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 on the remote control are... - Page 29 FILE NO. SVM-02008 7-2-4. Heating operation *Heating and cooling model only 7-2-3. Dry operation ([MODE] button on the remote control is set ([MODE] button on the remote control is set to to the dry operation.) the heating operation.) (1) The compressor, 4-way valve, outdoor fan and (1) The compressor, 4-way valve, outdoor fan and operation display on the remote control are operation display on the remote control are...
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Page 30: Cooling Operation
*3: SUL means Super Ultra Low. Fan only operation *4: Calculated from difference in motor speed –1 between SUL and HIGH. Heating operation Fig. 7-2-8 Cold draft preventing control RAS-18UFHP-E RAS-18UFP-E, RAS-18UFPX RAS-24UFHP-E RAS-18UPX-T2 *5 and *6: RAS-18UFP-AR RAS-24UFP-E, RAS-24UFPX... -
Page 31: Hi Power Mode
FILE NO. SVM-02008 7-3. Hi POWER Mode 7-4. High-Temperature Limit Control ([Hi POWER] button on the remote The microcontroller detects the indoor heat exchanger control is pressed.) temperature to prevent pressure of a refrigerating cycle from increasing excessively. When [Hi POWER] button is pressed while the indoor The compressor and outdoor fan motor are controlled unit is in Auto, Cooling or Heating operation, Hi as shown in Fig. -
Page 32: Auto Restart Function
FILE NO. SVM-02008 7-7. Auto Restart Function 7-7-1. How to set 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 33: Filter Check Lamp
FILE NO. SVM-02008 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 34: 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 35 FILE NO. SVM-02008 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.
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Page 36: Installation Diagram Of Indoor And Outdoor Units
FILE NO. SVM-02008 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 37: Installation
FILE NO. SVM-02008 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-18UFPX-T2) Pipe insulating material (polyethylene foam, 6 mm thick) Putty, PVC tapes each <Fixing bolt arrangement of outdoor unit>... - Page 38 FILE NO. SVM-02008 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 Zeolite filter x 1 the outdoor unit)
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Page 39: Indoor Unit
FILE NO. SVM-02008 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 40 FILE NO. SVM-02008 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 41 FILE NO. SVM-02008 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 42 FILE NO. SVM-02008 • 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 43 FILE NO. SVM-02008 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 44 FILE NO. SVM-02008 <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 45 FILE NO. SVM-02008 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>...
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Page 46: Outdoor Unit
FILE NO. SVM-02008 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 47 FILE NO. SVM-02008 <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 48 FILE NO. SVM-02008 <Stripping length of connecting cable> TO CHARGE REFRIGERANT Terminal block RAS-18UFHP-E / 18UAH-E RAS-24UFHP-E / 24UAH-E Terminal block RAS-18UFP-E / 18UA-E RAS-24UFP-E / 24UA-E RAS-18UFPX / 18UAX RAS-24UFPX / 24UAX RAS18UFP-AR / 18UA-AR RAS-24UFP-AR / 24UA-AR Earth line...
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Page 49: How To Set Remote Control Selector Switch
FILE NO. SVM-02008 2. Set the remote control selector switch with the 8-6. How to Set Remote Control Selector remote control Switch When two indoor units ae installed in seperated rooms, [B] is indicated on the liquid crystal display when there is no need to change the selector switch. -
Page 50: How To Use Drain Pump Kit Of Option
FILE NO. SVM-02008 8-7. How to Use Drain Pump Kit of Option 8-8. Others In the case of upward drainage from the unit (Under 8-8-1. Gas leak test ceiling installation). It is necessary to use Drain pump Electric parts cover kit of option parts. -
Page 51: Troubleshooting Chart
FILE NO. SVM-02008 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-02008 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: Self-Diagnosis By Remote Control (Check Code)
FILE NO. SVM-02008 9-4. Self-Diagnosis by Remote Control (Check Code) (1) If the lamps are indicated as shown B to H 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 opera- tion condition and indicate the information of the self-diagnosis on the display of the remote control... - Page 54 FILE NO. SVM-02008 Table 9-4-1 Block level Diagnosis function Judgement and action Check Check Unit Block Symptom Condition code code status Indoor The indoor thermo sensor (TA) is Operation The lamp on the 1. Check the indoor thermo sensor (TA). P.C.
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Page 55: How To Diagnose Faulty Parts
FILE NO. SVM-02008 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-02008 [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-02008 [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-02008 [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...
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Page 59: Troubleshooting For Indoor Unit
FILE NO. SVM-02008 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-02008 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-02008 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-02008 <Inspection procedure> -Cooling and heating model- Turn on power supply. Refer to item “Power Does OPERATION can not be turned on”. lamp blink? Refer to 9-9 Is it possible to start “Troubleshooting for unit by remote control? Remote Control”.
- Page 63 FILE NO. SVM-02008 Rewire or replace Are all of compressor defective cords. cords normal? Is compressor motor Compressor is Replace compressor. winding normal? defective. (Check winding resistor.) Capacitor is Is capacitor for Replace capacitor. defective. compressor normal? Overload relay is Replace overload relay.
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Page 64: Troubleshooting For Wiring (Interconnect Cable And Serial Signal Wire)
FILE NO. SVM-02008 9-7. Troubleshooting for Wiring (Interconnect Cable and Serial Signal Wire) 9-7-1. Outdoor unit does not operate. <Inspection procedure> (1) Is the voltage between 2 and 3 of the indoor terminal block varied? (2) Are signals from the indoor unit to the outdoor unit transmitted correctly based upon the following diagram? NOTE: •... -
Page 65: Troubleshooting For P.c. Board
FILE NO. SVM-02008 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 66 FILE NO. SVM-02008 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 67 FILE NO. SVM-02008 9-8-3. How to check outdoor P.C. board When the check code is detected on the outdoor unit, the following lamps are indicated on the LED display and the Dip switch (DSW01). Table 9-8-3 LED display and check code switch 1 Red 2 Yellow...
- Page 68 FILE NO. SVM-02008 9-8-4. P.C. board layout Top View Bottom View – 67 –...
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Page 69: Troubleshooting For Remote Control
FILE NO. SVM-02008 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 70: Parts Replacement
FILE NO. SVM-02008 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-02008 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-02008 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-02008 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-02008 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.
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Page 75: Outdoor Unit
FILE NO. SVM-02008 10-2. Outdoor Unit (Heat pump: RAS-18UAH-E) (Cooling: RAS-18UA-E, RAS-18UAX, RAS-18UA-AR) Part name Procedures Remarks Common 1) Stop the operation of the air conditioner procedure and turn off its main power supply or remove the power supply wires. Electrical parts cover 2) Remove the electrical parts cover. -
Page 76: Ras-24Uax-T)
FILE NO. SVM-02008 10-3. Outdoor Unit (Heat pump: RAS-24UAH-E) (Cooling: RAS-18UAX-T2, RAS-24UA-E, RAS-24UAX, RAS-24UA-AR, RAS-24UAX-T) Part name Procedures Remarks Common 1) Stop the operation of the air conditioner Top cabinet procedure and turn off its main power supply or remove the power supply wires. Electrical parts 2) Remove the electrical parts cover. -
Page 77: Exploded Views And Parts List
43T69311 used for these models: RAS-24UFHP-E, RAS-24UFHP-E, RAS-24UFHP-ES 43T69312 used for these models: RAS-24UFP-E, RAS-24UFPX-E, RAS-24UFP-AR, RAS-24UFPX-T, RAS-24UFP-ES, RAS-24UFP-E, RAS-18UFPX-T2 43T69313 used for these models: RAS-18UFHP-E, RAS-18UFHP-E, RAS-18UFHP-ES 43T69314 used for these models: RAS-18UFP-E, RAS-18UFPX, RAS-18UFP-AR, RAS-18UFP-ES, RAS-18UFP-E – 76 –... -
Page 78: Indoor Unit (Ras-18Ufhp-E, Ras18Ufp-E, Ras18Ufpx, Ras-18Ufp-Ar)
FILE NO. SVM-02008 11-2. Indoor Unit (RAS-18UFHP-E, RAS18UFP-E, RAS18UFPX, RAS-18UFP-AR) Location Part Location Part Description Description 43T09312 Air Inlet Grille 43T49303 Pipe Holder 43T00357 Panel Arm Assy 43T19304 Cover Body L 43T00358 Front Panel Assy (18UFHP-E) 43T19305 Cover Body R... -
Page 79: Indoor Unit (Ras-18Ufpx-T2, Ras-24Ufhp-E, Ras24Ufp-E, Ras24Ufpx, Ras-24Ufp-Ar, Ras-24Ufpx-T)
FILE NO. SVM-02008 11-3. Indoor Unit (RAS-18UFPX-T2, RAS-24UFHP-E, RAS24UFP-E, RAS24UFPX, RAS-24UFP-AR, RAS-24UFPX-T) Location Part Location Part Description Description 43T09312 Air Inlet Grille 43T49303 Pipe Holder 43T00357 Panel Arm Assy 43T19304 Cover Body L 43T00358 Front Panel Assy (24UFHP-E) 43T19305 Cover Body R 43T00361 Front Panel Assy 43T19306 Cover Body LD 43T01004 Mark... -
Page 80: Outdoor Unit (Ras-18Uah-E)
FILE NO. SVM-02008 11-4. Outdoor Unit (RAS-18UAH-E) 37,38 16,17 5 18,19 20: Capillary tube 0.8 Dia. 21: Capillary tube 1.2 Dia. 22: Capillary tube 2.0 Dia. Location Part Location Part Description Description 43005144 Front Cabinet 43T47309 Tube, Capillary, 0.8 Dia. 43T00005 Back Cabinet 43T47007 Tube, Capillary, 1.2 Dia. -
Page 81: Outdoor Unit (Ras-18Ua-E, Ras-18Uax)
FILE NO. SVM-02008 11-5. Outdoor Unit (RAS-18UA-E, RAS-18UAX) 23: Capillary tube 2.4 Dia. Location Part Location Part Description Description 43005144 Front Cabinet 43T47020 Bonnet, 6.35 Dia. 43T00005 Back Cabinet 43T46019 Valve, Packed 12.7 43T00004 Side Cabinet 43T47018 Bonnet, 1.2 Dia. 43042446 Base 43T47025 Tube, Capillary, 2.4 Dia. -
Page 82: Outdoor Unit (Ras-18Uax-T2, Ras-24Ua-E, Ras-24Uax, Ras-24Ua-Ar, Ras-24Uax-T)
FILE NO. SVM-02008 11-6. Outdoor Unit (RAS-18UAX-T2, RAS-24UA-E, RAS-24UAX, RAS-24UA-AR, RAS-24UAX-T) Location Part Location Part Description Description 43T00024 Panel, Air Outlet 43141301 Compressor, PH280X3-4MS 43T00025 Panel, Front 43T62014 Protector, Cord 43T00026 Panel, Side 43T62015 Protector, Cord 43T42002 Base Assembly 43T49011 Base, Spring A 43T19012 Guard, Fin 43T49019 Spring, Buffer 43T19011 Guard, Fan... -
Page 83: Outdoor Unit (Ras-24Uah-E)
FILE NO. SVM-02008 11-7. Outdoor Unit (RAS-24UAH-E) Location Part Location Part Description Description 43T00024 Panel, Air Outlet 43T49011 Base, Spring A 43T00025 Panel, Front 43T49019 Spring, Buffer 43T00026 Panel, Side 43T49012 Base, Spring B 43T42002 Base Assembly 43T21306 Motor, Fan, AC220 – 240V 50Hz 43T19012 Guard, Fin 43T20010 Fan, Propeller, 490 43T19011 Guard, Fan...