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Toshiba RAS-3M26U2AVG-E Service Manual
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Toshiba RAS-3M26U2AVG-E Service Manual

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FILE NO. SVM-18051-3
SERVICE MANUAL
AIR-CONDITIONER
SPLIT TYPE
RAS-3M26U2AVG-E
RAS-3M26U2AVG-TR
R32
Revised on December, 2018

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Summary of Contents for Toshiba RAS-3M26U2AVG-E

  • Page 1 FILE NO. SVM-18051-3 SERVICE MANUAL AIR-CONDITIONER SPLIT TYPE RAS-3M26U2AVG-E RAS-3M26U2AVG-TR Revised on December, 2018...
  • Page 2 FILE NO. SVM-18051 CONTENTS - 2 -...
  • Page 3 FILE NO. SVM-18051 1. SAFETY PRECAUTIONS The important contents concerned to the safety are described on the product itself and on this Service Manual. Please read this Service Manual after understanding the described items thoroughly in the following contents (Indications/Illustrated marks), and keep them. [Explanation of indications] Indication Explanation...
  • Page 4 FILE NO. SVM-18051 CAUTION New Refrigerant Air Conditioner Installation • THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R32 WHICH DOES NOT DESTROY OZONE LAYER. R32 refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure of R32 refrigerant is approx.
  • Page 5 FILE NO. SVM-18051-3 WARNING • Never modify this unit by removing any of the safety guards or bypassing any of the safety interlock switches. • Do not install in a place which cannot bear the weight of the unit. Personal injury and property damage can result if the unit falls.
  • Page 6 Outdoor unit Combinations of indoor unit models that can be connected Heat pump RAS-3M26U2AVG-E, -TR Refer to page 7 to 18 NOTES A 1-room connection is not an option for the indoor units (you cannot connect only one indoor unit).
  • Page 7 FILE NO. SVM-18051 Combination of indoor units Outdoor Unit : RAS-3M262AVG-E, -TR Power supply voltage： 220V Operation mode Cooling ： Operatin Indoor unit Unit capacity (kW) Cooling capacity (kW) Power consumption (W) Operating current (A) Power factor (%) ΣkBTU Rate Rate Rate Rate Max...
  • Page 8 FILE NO. SVM-18051 Operation mode ： Cooling Power supply voltage： 220V Indoor unit Cooling capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 3 units 4.15 1.87 1.38 1975...
  • Page 9 FILE NO. SVM-18051 Operation mode ： Cooling Power supply voltage： 230V Indoor unit Cooling capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 1 unit 1.50 3.60 3.61 3.32...
  • Page 10 FILE NO. SVM-18051 Operation mode ： Cooling Power supply voltage： 230V Indoor unit Cooling capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 3 units 3.26 2.68 1.45 1975...
  • Page 11 FILE NO. SVM-18051 Operation mode ： Cooling Power supply voltage： 240V Indoor unit Cooling capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 1 unit 1.50 3.45 3.46 3.19...
  • Page 12 FILE NO. SVM-18051 Operation mode ： Cooling Power supply voltage： 240V Indoor unit Cooling capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 3 units 3.26 2.68 1.45 1975...
  • Page 13 FILE NO. SVM-18051 Operation mode ： Heating Power supply voltage： 220V Indoor unit Heating capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 1 unit 2.00 1.87 3.13 4.17...
  • Page 14 FILE NO. SVM-18051 Operation mode ： Heating Power supply voltage： 220V Indoor unit Heating capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 3 units 3.71 3.37 1.82 11.0...
  • Page 15 FILE NO. SVM-18051 Operation mode ： Heating Power supply voltage： 230V Indoor unit Heating capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 1 unit 2.00 1.79 3.00 3.99...
  • Page 16 FILE NO. SVM-18051 Operation mode ： Heating Power supply voltage： 230V Indoor unit Heating capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 3 units 3.71 3.37 1.82 11.0...
  • Page 17 FILE NO. SVM-18051 Operation mode ： Heating Power supply voltage： 240V Indoor unit Heating capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 1 unit 2.00 1.71 2.87 3.83...
  • Page 18 FILE NO. SVM-18051 Operation mode ： Heating Power supply voltage： 240V Indoor unit Heating capacity (kW) Power consumption (W) Operating current (A) Power factor (%) Operatin Unit capacity (kW) status ΣkBTU Rate Rate Rate Rate Max Rate 3 units 3.71 3.37 1.82 11.0...
  • Page 19 FILE NO. SVM-18051 2-3-1. Operation Characteristic Curve <Cooling> <Heating> • Conditions • Conditions 220V Indoor : DB27˚C/WB19˚C 220V Indoor : DB20˚C Outdoor : DB35˚C Outdoor : DB7˚C / WB6˚C Air flow : High Air flow : High Pipe length : 5m × 3 Pipe length : 5m ×...
  • Page 20 FILE NO. SVM-18051 3. REFRIGERANT R32 3. If a refrigeration gas leakage occurs during This air conditioner adopts the new refrigerant HFC installation/servicing, be sure to ventilate fully. (R32) which does not damage the ozone layer. If the refrigerant gas comes into contact with fire, a The next section describes the precautions for air poisonous gas may occur.
  • Page 21 FILE NO. SVM-18051 Table 3-2-1 Thicknesses of annealed copper pipes Thickness (mm) Nominal diameter Outer diameter (mm) 6.35 0.80 0.80 9.52 0.80 0.80 12.70 0.80 0.80 15.88 1.00 1.00 2. Joints For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare Joints Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm.
  • Page 22 FILE NO. SVM-18051 d) Flare Processing Make certain that a clamp bar and copper pipe have been cleaned. ØD By means of the clamp bar, perform the flare processing correctly. Use either a flare tool for R32 or conventional flare tool. Flare processing dimensions differ according to the type of flare tool.
  • Page 23 FILE NO. SVM-18051 Table 3-2-6 Flare and flare nut dimensions for R22 Dimension (mm) Nominal Outer diameter Thickness Flare nut width diameter (mm) (mm) (mm) 6.35 9.52 13.0 13.5 12.70 16.2 16.0 12.9 15.88 19.7 19.0 16.0 19.05 23.3 24.0 19.2 Fig.
  • Page 24 FILE NO. SVM-18051 3-3. Tools 3-3-1. Required Tools The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R32 is changed to prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.
  • Page 25 FILE NO. SVM-18051 3-4. Recharging of Refrigerant When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps. Recover the refrigerant, and check no refrigerant remains in the equipment. When the compound gauge’s pointer has indicated –0.1 Mpa (–76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump’s power switch.
  • Page 26 FILE NO. SVM-18051 1. Be sure to make setting so that liquid can be charged. 2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down. It is necessary for charging refrigerant under condition of liquid because R32 is mixed type of refrigerant. Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the cylinder upside down if cylinder is not equipped with siphon.
  • Page 27 FILE NO. SVM-18051 2. Characteristics required for flux 3-5-3. Brazing • Activated temperature of flux coincides with the As brazing work requires sophisticated techniques, brazing temperature. experiences based upon a theoretical knowledge, it must be performed by a person qualified. •...
  • Page 28 FILE NO. SVM-18051 4. CONSTRUCTION VIEWS 2-dia.12 17 U-sharp hole × (for dia.8-10 anchor bolt) A leg part B leg part 2-dia.12 17 long hole × (for dia.8-10 anchor bolt) Fan guard Hanger Liquid valve Connecting pipe port： Service part Connecting pipe dia.6.35 C unit Gas valve...
  • Page 29 FILE NO. SVM-18051 5. WIRING DIAGRAM REACTOR CN300 MAIN P.C. MCC-1436 FAN MOTOR BOARD REACTOR (MCC-1571) CN609 CN200 t°> (BLU) POWER CN201 SUPPLY CIRCUIT THERMOSTAT CN202 COMPRESSOR F100 COMPRESSOR T3.15A 250V P< CN690 CN701 (WHI) HIGH PRESSURE SWITCH 250V 4WAY VALVE COIL T10A 250V CN800...
  • Page 30 FILE NO. SVM-18051 6. SPECIFICATIONS OF ELECTRICAL PARTS Parts name Model name Rating Compressor 3 Phases (4-Poles) ; 2000 W DX220A2T-20L ICF-280-A60-1 Outdoor fan motor Output 60 W CH-56-3Z-T Reactor 5.8 mH, 18.5 A Reactor CH-76-2VK 9.9 mH, 1 A 4-way valve coil STF-H01AP1874A1 AC 200–240 V...
  • Page 31 FILE NO. SVM-18051 7. REFRIGERANT CYCLE DIAGRAM 7.1 Refrigerant cycle diagram High Pressure switch tank 1500cc DX220A2T-20L ∅2 -∅3 , 450Lx2 ∅2 -∅3 , 550Lx1 ∅2 -∅3 , 600Lx1 1.92kg (R32) Outdoor unit NOTE : • You need not add refrigerant if the piping length is 40m or less. •...
  • Page 32 FILE NO. SVM-18051 7-2. Operation Data Outdoor Unit: RAS-3M26U2AVG-E,-TR <Cooling> Operation condition Cooling mode (Indoor unit high fan speed) Heating mode (Indoor unit high fan speed) Temperature condition Indoor 27 / 19 C, Outdoor 35 / 24 Indoor 20 / -...
  • Page 33 FILE NO. SVM-18051 Operation condition Cooling mode (Indoor unit high fan speed) Heating mode (Indoor unit high fan speed) Temperature condition Indoor 27 / 19 C, Outdoor 35 / 24 Indoor 20 / - C, Outdoor 7 / 6 Standard Heat exchanger Compressor Standard...
  • Page 34 FILE NO. SVM-18051 8. CONTROL BLOCK DIAGRAM 8-1. Outdoor Unit (Inverter Assembly) Outdoor air temp. sensor Gas side pipe temp. sensor Suction temp. sensor Evaporator temp. sensor Discharge temp. sensor WP-041 (CONTROL P.C. B) A unit P.M.V. M.C.U A unit serial signal •...
  • Page 35 FILE NO. SVM-18051 9. OPERATION DESCRIPTION 9-1. Outline of Air Conditioner Control • Detection of inverter input current and current release operation This air conditioner is a capacity-variable type air • Over-current detection and prevention operation conditioner, which uses DC motor for the indoor fan to IGBT module (Compressor stop function) motor and the outdoor fan motor.

  • Page 36: Table Of Contents

    FILE NO. SVM-18051 9-2. Operation Description 1. Basic operation ........................37 1. Operation control ....................... 37 2. Operating mode selection when performing 2-room operation ......... 38 3. Cooling/Heating operation ....................38 2. Outdoor fan motor control ....................... 39 3. Capacity control ........................40 Current release control ......................

  • Page 37: Basic Operation

    FILE NO. SVM-18051 Item Operation flow and applicable data, etc. Description 1. Operation control 1. Basic operation Receiving the user’s operation condition setup, the operation statuses of indoor/outdoor units are controlled. 1) The operation conditions are selected by the remote controller as shown in the below. 2) A signal is sent by ON button of the remote controller.

  • Page 38: Operating Mode Selection When Performing 2-Room Operation

    FILE NO. SVM-18051 Item Operation flow and applicable data, etc. Description 2. Operating mode selection when performing 2-room operation 1. Basic operation 1) The outdoor unit operating mode conforms to the instructions of the indoor unit that was pushed first. 2) When combined operation consisting of cooling (dry) and heating, fan (air purification) and heating, or cleaning operation and heating is performed, operation conforms to the instructions of the indoor unit that was pushed first as shown in the following table.

  • Page 39: Outdoor Fan Motor Control

    FILE NO. SVM-18051 Item Operation flow and applicable data, etc. Description 2. Outdoor fan The blowing air volume at the outdoor unit side is controlled. 1) The operation command sent motor control from the remote controller is Receiving the operation command from the controller of indoor processed by the indoor unit unit, the controller of outdoor unit controls fan speed.

  • Page 40: Capacity Control

    FILE NO. SVM-18051 Item Operation flow and applicable data, etc. Description 3. Capacity 1) The indoor units from A to C determine the respective instruction revolutions from the difference between the remote controller setting temperature (Ts) and the indoor temperature (Ta), and control transmit this to the outdoor unit.

  • Page 41: Winding/Coil Heating Control

    FILE NO. SVM-18051 Item Operation flow and applicable data, etc. Description 5. Winding/Coil When the outdoor temperature is low, the windings/ Winding/Coil heating is performed when heating control coils are heated to ensure compressor reliability. the following conditions are met. Condition 1 : Outdoor temperature To Winding/Coil...

  • Page 42: Discharge Temperature Control

    FILE NO. SVM-18051 Item Operation flow and applicable data, etc. Description 1. Purpose 8. Discharge temperature This function detects error on the control refrigerating cycle or error on the compressor, and performs protective control. Td value Control operation 2. Operation Judges as an error and stops the compressor.

  • Page 43: Service Switch (Sw801, Sw802) Operations

    FILE NO. SVM-18051 9-3. Service switch (SW801, SW802) operations Various displays and various operations are enabled by push buttons (service) switches and LED on the outdoor control P.C. board. 9-3-1. LED display 5 patterns are provided for LED display. ○:ON (○*:3 sec ON/0.5 sec OFF), ●:OFF, ◎:Rapid Flashing(5 times/sec), ◇:Slow Flashing(1 time/sec) D800 D801 D802...
  • Page 44 FILE NO. SVM-18051 9-3-2. Service switch setting and service support function You can choose service switch setting and service support function. Operating method is as below. Turn on the circuit breaker Push SW801 & SW802 at the same time for 5 sec or more Initial status D800 D801...
  • Page 45 FILE NO. SVM-18051 [Confirmation method of various settings] You can confirm that various settings are validated. 1) Check LED displays are in the initial status. If it are not so, return them to the initial status. 2) Push and hold SW801 for 5 seconds or more. D804 changes to slow flashing. 3) Push SW801 several times and then stop it at the point where LED display (D800 to D804) to be checked.
  • Page 46 FILE NO. SVM-18051 9-3-4. Service support function Various displays are available by setting service switches. [Operating method] 1) Check LED display is the initial status. If it is not so, set the initial status. 2) Push SW801 several times and stop it at the item that you want to check. ○:ON (○*:3 sec ON/0.5 sec OFF)●:OFF Display ◎:Rapid Flashing(5 times/sec) ◇:Slow Flashing(1 time /sec)
  • Page 47 FILE NO. SVM-18051 3) Pushing SW802, the display changes to next item. To see other display contents, repeat that. 4) To finish LED display, be sure to execute item 1) to return LED to the initial status (error display of current occurrence) and then finish LED display.
  • Page 48 FILE NO. SVM-18051 C. Sensor, current, compressor operation frequency, PMV opening, Miswiring (mispiping) check display Using the service display function, you can check a variety of information. ○:ON (○*:3 sec ON/0.5 sec OFF)●:OFF ◎:Rapid Flashing(5 times/sec) ◇:Slow Flashing(1 time /sec) display Contents D800 D801 D802 D803 D804...
  • Page 49 FILE NO. SVM-18051 9-3-5. How to set the SERVICE SWITCH SETTING. If you want to set the "COOLING ONLY SETTING OFF ⇒ ON" . ○:ON, ●:OFF, ◎:Rapid Flashing(5 times/sec), ◇:Slow Flashing(1 time/sec) Turn on the circuit breaker Initial status D800 D801 D802 D803...
  • Page 50 FILE NO. SVM-18051 9-3-6. How to set the SERVICE SUPPORT FUNCTION. If you want to check the "COMPRESSOR FREQUENCY" . ○:ON, ●:OFF, ◎:Rapid Flashing(5 times/sec), ◇:Slow Flashing(1 time/sec) Turn on the circuit breaker Initial status D800 D801 D802 D803 D804 D805 (Yellow) (Yellow)

  • Page 51: Intermittent Operation Control For Indoor Fans Of The Indoor Unit At Thermo-Off Side In Heating Operation

    FILE NO. SVM-18051 9-4. Intermittent Operation Control for Indoor Fans of the Indoor Unit at Thermo-off Side in Heating Operation While heating operation is executed in two rooms, if room temperature reached the setup temperature in one room and thermo-off occurred, the following operations start. (Refer to the figure below.) 1.
  • Page 52 FILE NO. SVM-18051 • New tools for R32 (R410A) New tools for Applicable to R22 model Changes R32 (R410A) As pressure is high, it is impossible to measure by means of × Gauge manifold conventional gauge. In order to prevent any other refrigerant from being charged, each port diameter has been changed.
  • Page 53 FILE NO. SVM-18051 10-2. Outdoor Unit 10-2-1. Accessory and Installation Parts CD-ROM Rubber cap (Installation manual) Installation manual (Water-proof) ∗1 Product F-GAS label Drain nipple specifi cation ∗1 Part that do not exist in RAS-3M26U2AVG-TR 10-2-2. Refrigerant Piping • Piping kit used for the conventional refrigerant cannot be used. •...
  • Page 54 FILE NO. SVM-18051 10-2-5. Installation Upper side view (Unit: mm) ■ Installation Location • A place which can bear the weight of the outdoor unit and does not cause an increase in noise level and vibration. • A place where the operation noise and air discharge do not disturb neighbours.
  • Page 55 FILE NO. SVM-18051 Fixing the Outdoor Unit ■ Refrigerant Piping Connection Fix the outdoor unit using attachment bolts. Flaring • Use 8 mm or 10 mm anchor bolts and nuts. • Do not allow the attachment bolts to protrude by more than 15 mm. 1.
  • Page 56 FILE NO. SVM-18051 Pipe connection (Unit : N•m) 1. Piping connections to the outdoor unit should be arranged in the sequence A, B, C starting from Outer dia. of copper pipe Tightening torque the bottom. Ø6.35 mm 16 to 18 (1.6 to 1.8 kgf•m) (For each piping connection, the gas pipe is on the bottom and the liquid pipe is on the top.) Ø9.52 mm...
  • Page 57 FILE NO. SVM-18051 CAUTION CAUTION • KEEP IMPORTANT 6 POINTS FOR Use a torque wrench and tighten the nut at PIPING WORK. the specifi ed torque value. Take away dust and moisture (inside of the connecting pipes). 6. Tighten all the caps on the valves securely, then perform a gas leak inspection.
  • Page 58 Remote connect a power cord to it as mentioned below. controller Leakage 3 Units Multi Indoor unit breaker Model RAS-3M26U2AVG-E,-TR Earth Power supply 220 – 240 V, ~50 Hz For indoor unit RAS-B series. (System (Main circuit) 16.1A interconnection wires)
  • Page 59 FILE NO. SVM-18051 Terminal block (Connecting cable) 1(L) 1(L) 1(L) POWER SUPPLY Screw Connecting cable (A unit) Power cord Connecting cable (B unit) Screw Connecting cable (C unit) Fig. 10-2-15 10-2-7. Grounding This air conditioner must be grounded without fail. Grounding is necessary not only to safeguard against the possibility of •...
  • Page 60 FILE NO. SVM-18051 10-2-8. Miswiring (Mispiping) Check 7. The below is displayed when the error is detected. (* Repetition of 3 sec ON / 0.5 sec OFF) Make sure that the wiring and piping for each room D800 D801 D802 D803 D804 D805...
  • Page 61 FILE NO. SVM-18051 10-3. Test Operation 10-3-4. Remote Control A-B Selection 10-3-1. Gas Leak Test • When two indoor units are installed in the same room or adjacent two rooms, if operating a unit, two units may Check the flare nut connections for gas leaks with a receive the remote control signal simultaneously and gas leak detector and/or soapy water.
  • Page 62 FILE NO. SVM-18051 11. HOW TO DIAGNOSE THE TROUBLE The pulse modulating circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the trouble diagnosis procedure as described below. (Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.) Table 11-1 Troubleshooting Procedure Page...
  • Page 63 FILE NO. SVM-18051 11-1. First Confirmation 11-1-3. Operation Which is not a Trouble (Program Operation) 11-1-1. Confirmation of Power Supply For controlling the air conditioner, the program Confirm that the power breaker operates (ON) operations are built in the microcomputer as normally.
  • Page 64 FILE NO. SVM-18051 11-2. Primary Judgment To diagnose the troubles, use the following methods. 1) Judgment by flashing LED of indoor unit 2) Self-diagnosis by service check remote controller 3) Judgment of trouble by every symptom Firstly use the method (1) for diagnosis. Then, use the method (2) or (3) to diagnose the details of troubles. For any trouble occurred at the outdoor unit side, detailed diagnosis is possible by 6-serial LED on the control P.C.
  • Page 65 FILE NO. SVM-18051 11-4. Self-Diagnosis by Remote Controller (Check Code) 1. If the lamps are indicated as shown B to E in Table 11-3-1, execute the self-diagnosis by the remote controller. 2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condition and indicates the information of the self-diagnosis on the display of the remote controller with the check codes.
  • Page 66 FILE NO. SVM-18051 11-4-2 Caution at Servicing 1. After using the service mode of remote controller finished, press the [ ] button to reset the remote controller to normal function. 2. After finished the diagnosis by the remote controller, turn OFF power supply and turn its ON again to reset the air conditioner to normal operation.
  • Page 67 FILE NO. SVM-18051 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Serial signal 1) Defective wiring of the Indoor unit Flashes when 1) to 3) The outdoor unit never and connecting connecting cable or operates...
  • Page 68 FILE NO. SVM-18051 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Outdoor Current on inverter circuit All OFF Flashes after 1. Remove connecting lead wire of the is over limit in short time.
  • Page 69 FILE NO. SVM-18051 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status 1. Check installation conditions such as Compressor drive output error. All OFF Flashes after Outdoor (Relation of voltage, current error is detected packed valve opening, refrigerant...
  • Page 70 FILE NO. SVM-18051 Block distinction Operation of diagnosis function Action and Judgment Check Check Display Block Cause of operation conditioner code code flashing error status The others Compressor does not rotate. All OFF Flashes after 1. Remove connecting lead wire of the (including Because of missed wiring, error is detected...
  • Page 71 FILE NO. SVM-18051 Block distinction Operation of diagnosis function Action and Judgment Check Check Display Block Cause of operation conditioner code code flashing error status Return signal of the outdoor Indoor unit Flashes when 1. . Check power supply (Rate +10%) The others operates error is detected...
  • Page 72 FILE NO. SVM-18051 11-5. Judgment of Trouble by Symptom 11-5-1. Wiring Failure (Interconnecting and Serial Signal Wire)(1) Outdoor unit does not operate 1) Is the voltage between of the indoor terminal block varied? 2) Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the following diagram.
  • Page 73 FILE NO. SVM-18051 Service Support Function (LED Display, Switch Operation) 1. Outline A various setup and operation check can be performed by the push down button switches (SW801, SW802) on the outdoor control P.C. board WP-041. Operation part Part No. Specifications Operation contents SW801...
  • Page 74 FILE NO. SVM-18051 11-6. Trouble Diagnosis by Outdoor LED For the outdoor unit, the self-diagnosis is possible by LED (Green) and five LEDs (Yellow). Green LED (D805) and Yellow LEDs (D800 to D804) are provided on the display P.C. board WP-041. 1.
  • Page 75 FILE NO. SVM-18051 :ON ( *:3 sec ON / 0.5 sec OFF) :OFF Check Outdoor Check and troubleshooting code LED display (Item without special mention indicates part of outdoor unit.) [1C]  [Case thermo operation, Power supply error ] Is AC mains voltage correct? Confirm power supply (198 to 264V) construction.
  • Page 76 FILE NO. SVM-18051 :ON ( *:3 sec ON / 0.5 sec OFF) :OFF Check Outdoor Check and troubleshooting code LED display (Item without special mention indicates part of outdoor unit.) [18] ∗ There is a possibility that it is one of the following errors. Confirm LED on outdoor P.C.
  • Page 77 FILE NO. SVM-18051 :ON ( *:3 sec ON / 0.5 sec OFF) :OFF Check Outdoor Check and troubleshooting code LED display (Item without special mention indicates part of outdoor unit.) [1C] ∗ There is a possibility that it is one of the following errors. Confirm LED on display P.C.
  • Page 78 FILE NO. SVM-18051 :ON ( *:3 sec ON / 0.5 sec OFF) :OFF Check Outdoor Check and troubleshooting code LED display (Item without special mention indicates part of outdoor unit.)  * [1C] [A room gas side temp. sensor (TGa) error] (Continued) Is connection of CN604 Correct connector.
  • Page 79 FILE NO. SVM-18051 :ON ( *:3 sec ON / 0.5 sec OFF) :OFF Check Outdoor Check and troubleshooting code LED display (Item without special mention indicates part of outdoor unit.)   [1D] [Compressor lock]  Is AC mains voltage correct? Check wiring construction.
  • Page 80 FILE NO. SVM-18051 :ON ( *:3 sec ON / 0.5 sec OFF) :OFF Check Outdoor Check and troubleshooting code LED display (Item without special mention indicates part of outdoor unit.) [20] ∗ There is a possibility that it is one of the following errors. Confirm LED on outdoor P.C.
  • Page 81 FILE NO. SVM-18051 :ON ( *:3 sec ON / 0.5 sec OFF) :OFF Check Outdoor Check and troubleshooting code LED display (Item without special mention indicates part of outdoor unit.) [21] ∗ There is a possibility that it is one of the following errors. Confirm LED on outdoor P.C.
  • Page 82 FILE NO. SVM-18051 11-7. Inspection of the Main Parts [1] Sensor characteristic table : Discharge temp. sensor : Outdoor temp. sensor : Outdoor heat exchanger temp. sensor : Suction temp. sensor TGa to TGc : Gas side temp. sensor TO, TE, TS, TGa to TGc Temperature (˚C) Outdoor Unit Part name...
  • Page 83 FILE NO. SVM-18051 11-8. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad 1. Symptom • Outdoor fan motor does not rotate. • Outdoor fan motor stops within several tens seconds though it started rotating. • Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc. Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”...
  • Page 84 FILE NO. SVM-18051 <MCC-1571> Electrolytic capacitors (760µF/400V) Lead wire for grounding P09 (Black) Fan motor output Fan motor output Fan motor output CN300 CN300 CN300 Compressor Compressor Compressor (Red, White, Black) (Red, White, Black) (Red, White, Black) output terminals output terminals output terminals CN200 CN200...
  • Page 85 FILE NO. SVM-18051 <WP-041> Indoor/Outdoor communication wire Power supply Protective fuse connecting connector F01 (250V, 3.15A ,plastic case) CN01 (Red) Lead wire for Indoor/ Indoor/Outdoor communication signal LED Outdoor communication D501, D508, D515 P01 (Yellow) (Green,Outdoor → Indoor) P02 (Red) D502, D511, D517 P03 (Green) (Orange,Indoor →...
  • Page 86 FILE NO. SVM-18051 12. HOW TO REPLACE THE MAIN PARTS 12-1. Outdoor Unit Part name Procedure Remarks CAUTION Common Front panel procedure Never forget to put on the gloves at working time; otherwise an injury will be caused by the parts etc. 1.
  • Page 87 FILE NO. SVM-18051 Part name Procedure Remarks 1. Detachment Discharge port cabinet 1) Perform work of Detachment 1 of 1 . Heat exchanger 2) Take off screws for the discharge port cabinet Fin guard Motor base and the partition plate. (ST1T Ø4 × 8, 3 pcs.) Partition plate 3) Take off screws for the discharge port cabinet and the bottom plate.
  • Page 88 FILE NO. SVM-18051 Part name Procedure Remarks Inverter 1) Perform works Detachment 1 of 1 and 3 . Fixing Inverter fixed board screw assembly WARNING Never disassemble the inverter until 5 minutes after the power supply was turned off because there is a fear that an electric shock may occur.
  • Page 89 FILE NO. SVM-18051 Part name Procedure Remarks Inverter 8) Remove the soundproof plate (upper). Soundproof plate (upper) assembly 9) Remove the terminal cover of the compressor (Continued) and then remove the compressor lead of the compressor. 10) Pull up the inverter assembly and then remove it. Reactor cover side Compressor lead Case thermo...
  • Page 90 FILE NO. SVM-18051 Part name Procedure Remarks CDB P.C. 1) Perform works of Detachment 1 of 1 and 4) Terminal relay Power supply connector connector board CDB P.C. board CAUTION Never disassemble the inverter until 5 minutes after the power supply was turned off because there is a fear that an electric shock may occur.
  • Page 91 FILE NO. SVM-18051 Part name Procedure Remarks 7) Remove the earth wire of IPDU P.C. board. IPDU P.C. Fixing screws (Truss head B tight screw Ø4 × 6, 1 pc.). Earth screw board for element 8) Take off fixing screws for IPDU P.C. board. (Continued) (7 positions) (Flange nut to fix element Ø3 ×...
  • Page 92 FILE NO. SVM-18051 Part name Procedure Remarks 1. Reactor to be attached to the inverter Replacement Reactor cover Reactor of reactor assembly relay connector 1) Perform works of Detachment 1 of 1 and 2) Remove the relay connector of the reactor. 3) Remove the reactor cover.
  • Page 93 FILE NO. SVM-18051 Part name Procedure Remarks Fan motor 1) Perform works of Detachment 1 of 1 and 2 . Propeller fan 2) Take off flange nut which fixes the fan motor and the propeller fan. Loosened by Loosened by Loosened by ∗...
  • Page 94 FILE NO. SVM-18051 Part name Procedure Remarks 1. Removal of defective compressor Compressor assembly 1) Perform work of Detachment 1 of 1 . 2) Recover the refrigerant gas from the outdoor unit. 3) Perform works of 2 , 3 and 4 . 4) Remove the soundproof plate and TD sensor.
  • Page 95 FILE NO. SVM-18051 Part name Procedure Remarks 1. Detachment Fan guard 1) Perform works of Detachment 1 of 1 and 2 . Discharge CAUTION Bell mouth port cabinet Work on the cardboard, cloth, and etc. in order to prevent damage on the product. 2) Take off the discharge port cabinet and put it as the fan guard side directs downward.
  • Page 96 FILE NO. SVM-18051 Part name Procedure Remarks ∗ Attachment 4-way valve coil Mount 4-way valve coil so that the label side directs upper side of the cabinet. Detail A Detail A 4-way valve unit 4-way valve unit 4-way valve unit Label Label Label...
  • Page 97 FILE NO. SVM-18051 Part name Procedure Remarks ∗ Attachment TE sensor (Outdoor heat Mount TE sensor on the straight part of the Detail F exchange condenser discharge port pipe so that the lead temperature) wire directs upward and the sensor directs the liquid store tank.
  • Page 98 FILE NO. SVM-18051 Part name Procedure Remarks ∗ Attachment TG sensor TGc: Green Mount these sensors on the directly arranged TGb: Red part of the header connecting pipe at gas side TGa: Yellow so that the cabinet turns toward the front side and the sensors turn toward upper cabinet.
  • Page 99 FILE NO. SVM-18051 Part name Procedure Remarks Sensor wiring ∗ Bind TS sensor, TE sensor and TO sensor with process the bundling band. Inverter fixing board (Continued) ∗ Pass TE sensor and TO sensor through upper part of the inverter fixing board and then bind them with the bundling band.
  • Page 100 BODY-PMV 43T00551 AIR OUTLET CABINET 43T46440 COIL-PMV 43T00564 UPPER CABINET ASSEMBLY 43T46383 VALVE-4WAY 43T39342 MOTOR BASE 43T63344 COIL-V-4WAY 43T19372 FAN GUARD(TOSHIBA) 43T48310 ACCUMULATOR ASSEMBLY 43T20329 PROPELLER FAN 43T63357 SW-PRESS 43T79305 DRAIN NIPPLE 43T21429 FAN MOTOR; ICF-280-A60-1 43T22313 BELLMOUTH 43T58307 REACTOR...
  • Page 101 FILE NO. SVM-18051 13-2. Inverter Assembly REACTOR, CH‐56‐3Z‐T 705 REACTOR TERMINAL BLOCK, 9P 700 TERMINAL BLOCK, 3P 719 FUSE 3.15A 250VAC SPACER, COLLAR 718 FUSE 10A 250VAC SPACER, BUSH 711 SPACER 707 FUSE SENSOR ASSY, SERVICE (TO, TS, TE) SENSOR ASSY, SERVICE (TGA~TGC) SENSOR ASSY, SERVICE (TD) 710 PC BOARD ASSY, MCC‐1436 712 PC BOARD ASSY, MCC‐1571 713 PC BOARD ASSY, WP‐041 Location Part Location Part...
  • Page 102 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

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