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Toshiba RAS-2M14U2AVG-E Service Manual
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Toshiba RAS-2M14U2AVG-E Service Manual

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SERVICE MANUAL
AIR-CONDITIONER
R32
SPLIT TYPE
RAS-2M14U2AVG-E,-TR
RAS-2M18U2AVG-E,-TR
RAS-3M18U2AVG-E,-TR
FILE NO. SVM-18020-2
Revised on May, 2018

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Summary of Contents for Toshiba RAS-2M14U2AVG-E

  • Page 1 FILE NO. SVM-18020-2 SERVICE MANUAL AIR-CONDITIONER SPLIT TYPE RAS-2M14U2AVG-E,-TR RAS-2M18U2AVG-E,-TR RAS-3M18U2AVG-E,-TR Revised on May, 2018...

  • Page 2: Table Of Contents

    FILE NO. SVM-18020-1 CONTENTS 1. SAFETY PRECAUTIONS ............3 2. SPECIFICATIONS ................ 6 3. REFRIGERANT R32 ..............33 4. CONSTRUCTION VIEWS ............41 5. WIRING DIAGRAM ..............42 6. SPECIFICATIONS OF ELECTRICAL PARTS......45 7. REFRIGERANT CYCLE DIAGRAM..........46 8. CONTROL BLOCK DIAGRAM ..........53 9.

  • Page 3: Safety Precautions

    FILE NO. SVM-18020-1 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-18020-1 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-18020-1 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: Specifications

    The indoor and outdoor units that can be used in combination are shown in the tables below. Table of models that can be used in combination Type Outdoor unit Combinations of indoor unit models that can be connected RAS-2M14U2AVG-E,-TR Refer to page 8 to 11 Heat pump RAS-2M18U2AVG-E,-TR Refer to page 12 to 17...
  • Page 7 FILE NO. SVM-18020-1 RAS-2M18U2AVG-E,-TR Unit model Outdoor RAS- 2M18U2AVG-E,-TR B16PKVSG-E,-TR + B13PKVSG-E,-TR RAS- Connection indoor unit of this specification Cooling Capacity (kW) Cooling Capacity range (kW) 1.7 to 6.2 Heating Capacity (kW) Heating Capacity range (kW) 1.3 to 7.5 Power supply 1Ph,220-240V,50Hz Cooling Heating...
  • Page 8 FILE NO. SVM-18020-1 2-2. Specifications of Performance When Each Indoor Units is Combined with Other Unit Outdoor unit ： RAS‐2M14U2AVG-E,-TR < Cooling / 220V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 1.50...
  • Page 9 FILE NO. SVM-18020-1 < Cooling / 240V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 1.50 1.50 1.53 ( 1.20 - 1.80 ) ( 380 ) ( 1.40 - 1.73 ) 2.00 2.00 2.05...
  • Page 10 FILE NO. SVM-18020-1 Outdoor unit ： RAS‐2M14U2AVG-E,-TR < Heating / 220V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 2.00 2.40 ( 0.9 2.5 ) ( 190 580 ) ( 1.20 2.88 ) 2.70 3.30...
  • Page 11 FILE NO. SVM-18020-1 < Heating / 240V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 2.00 2.20 ( 0.9 2.5 ) ( 190 580 ) ( 1.10 2.64 ) 2.70 3.04 ( 0.9...
  • Page 12 FILE NO. SVM-18020-1 Outdoor unit ： RAS‐2M18U2AVG-E,-TR < Cooling / 220V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 1.50 1.80 ( 1.2 1.8 ) ( 240 380 ) ( 1.42 1.85 ) 2.00 2.40...
  • Page 13 FILE NO. SVM-18020-1 < Cooling / 230V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 1.50 1.73 ( 1.2 1.8 ) ( 240 380 ) ( 1.36 1.78 ) 2.00 2.29 ( 1.3...
  • Page 14 FILE NO. SVM-18020-1 < Cooling / 240V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 1.50 1.65 ( 1.2 1.8 ) ( 240 380 ) ( 1.30 - 1.70 ) 2.00 2.20 ( 1.3...
  • Page 15 FILE NO. SVM-18020-1 Outdoor unit ： RAS‐2M18U2AVG-E,-TR < Heating / 220V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 2.00 2.46 ( 1.0 2.5 ) ( 210 590 ) ( 1.26 2.82 2.70 3.37...
  • Page 16 FILE NO. SVM-18020-1 < Heating / 230V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 2.00 2.35 ( 1.0 2.5 ) ( 210 590 ) ( 1.20 2.70 2.70 3.22 ( 1.0 3.4 ) ( 210...
  • Page 17 FILE NO. SVM-18020-1 < Heating / 240V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 2.00 2.25 ( 1.0 2.5 ) ( 210 590 ) ( 1.15 2.59 2.70 3.09 ( 1.0 3.4 ) ( 210...
  • Page 18 FILE NO. SVM-18020-1 Outdoor unit ： RAS‐3M18U2AVG-E,-TR < Cooling / 220V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 1.50 1.81 1.8 ) ( 380 ) ( 1.60 1.85 2.00 2.40 2.5 ) (...
  • Page 19 FILE NO. SVM-18020-1 < Cooling / 220V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 3 units 1.50 1.50 1.50 1130 5.47 6.3 ) ( - 1890 ) ( 2.32 9.00 2.00 1.50 1.50...
  • Page 20 FILE NO. SVM-18020-1 < Cooling / 230V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 1.50 1.73 1.8 ) ( 380 ) ( 1.52 1.78 2.00 2.29 2.5 ) ( 650 ) ( 1.58 3.04...
  • Page 21 FILE NO. SVM-18020-1 < Cooling / 230V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 3 units 1.50 1.50 1.50 1130 5.23 6.3 ) ( - 1890 ) ( 2.22 8.58 2.00 1.50 1.50...
  • Page 22 FILE NO. SVM-18020-1 < Cooling / 240V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 1.50 1.66 1.8 ) ( 380 ) ( 1.46 1.70 2.00 2.19 2.5 ) ( 650 ) ( 1.52 2.91...
  • Page 23 FILE NO. SVM-18020-1 < Cooling / 240V > Total Operating Indoor unit Unit capacity (kW) Cooling capacity Power consumption Operating current status ΣkBTU (kW) 3 units 1.50 1.50 1.50 1130 5.01 6.3 ) ( - 1890 ) ( 2.13 8.22 2.00 1.50 1.50...
  • Page 24 FILE NO. SVM-18020-1 Outdoor unit ： RAS‐3M18U2AVG-E,-TR < Heating / 220V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 2.00 2.46 590 ) ( 1.26 2.82 2.70 3.37 980 ) ( 1.26 4.69 4.00...
  • Page 25 FILE NO. SVM-18020-1 < Heating / 220V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 3 units 2.00 2.00 2.00 1700 8.13 - 2250 ) ( 2.34 10.64 ) 2.70 2.00 2.00 1900 9.09...
  • Page 26 FILE NO. SVM-18020-1 < Heating / 230V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 2.00 2.35 590 ) ( 1.20 2.70 2.70 3.24 980 ) ( 1.20 4.50 4.00 1160 5.38...
  • Page 27 FILE NO. SVM-18020-1 < Heating / 230V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 3 units 2.00 2.00 2.00 1700 7.78 - 2250 ) ( 2.24 10.20 ) 2.70 2.00 2.00 1900 8.70...
  • Page 28 FILE NO. SVM-18020-1 < Heating / 240V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 1 unit 2.00 2.25 590 ) ( 1.15 2.60 2.70 3.10 980 ) ( 1.15 4.30 4.00 1160 5.15...
  • Page 29 FILE NO. SVM-18020-1 < Heating / 240V > Total Operating Indoor unit Unit capacity (kW) Heating capacity Power consumption Operating current status ΣkBTU (kW) 3 units 2.00 2.00 2.00 1700 7.46 - 2250 ) ( 2.15 9.76 2.70 2.00 2.00 1900 8.35 - 2250 ) (...
  • Page 30 FILE NO. SVM-18020-1 2-3-1. Operation Characterisic Curve <Cooling> <Heating> RAS-2M14U2AVG-E,-TR RAS-2M14U2AVG-E,-TR ‐ Condition ‐ Condition Indoor : DB27 C / WB19 Indoor : DB20 Indoor air flow : High Indoor air flow : High Pipe length      : 5m x 2 Pipe length     : 5m x 2 2 units operating 2 units operating 230V 230V 220V 220V 240V 240V Inverter output frequency (rps) Inverter output frequency (rps)
  • Page 31 FILE NO. SVM-18020-1 2-3-2. Capacity Variation Ratio According to outdoor Temperature <Heating> <Cooling> RAS-2M14U2AVG-E,-TR RAS-2M14U2AVG-E,-TR ・Conditions Current limited start Indoor ：DB20 Indoor air flow ： High Pipe length ： 5m×2 2 units operating ・Conditions Indoor / WB19 ：DB27 Indoor air flow ：...
  • Page 32 FILE NO. SVM-18020-1 2-3-3. Capacity Variation Ratio according to Pipe Length <Cooling> <Heating> RAS-2M14U2AVG-E,-TR RAS-2M14U2AVG-E,-TR ・Conditions ・Conditions Indoor ：DB27 /WB19 Indoor ：DB20 Outdoor Outdoor ：DB7 /DW6 ：DB35 Indoor air flow: ：High Indoor air flow: ：High 2 units operating 2 units operating Standard pipe length ：...

  • Page 33: Refrigerant R32

    FILE NO. SVM-18020-1 3. REFRIGERANT R32 3. If a refrigeration gas leakage occurs during This air conditioner adopts the new refrigerant HFC (R32) which does not damage the ozone layer. installation/servicing, be sure to ventilate fully. If the refrigerant gas comes into contact with fire, a The next section describes the precautions for air conditioner using the new refrigerant.
  • Page 34 FILE NO. SVM-18020-2 Table 3-2-1 Thicknesses of annealed copper pipes Thickness (mm) Nominal diameter Outer diameter (mm) R32(R410A) 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 35 FILE NO. SVM-18020-2 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 conven- tional flare tool. Flare processing dimensions differ according to the type of flare tool.
  • Page 36 FILE NO. SVM-18020-2 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 37 FILE NO. SVM-18020-2 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 38 FILE NO. SVM-18020-2 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 39 FILE NO. SVM-18020-2 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. 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 40 FILE NO. SVM-18020-2 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 41: Construction Views

    FILE NO. SVM-18020-2 4. CONSTRUCTION VIEWS 4-1. Outdoor Unit - 41 -...

  • Page 42: Wiring Diagram

    FILE NO. SVM-18020-2 5. WIRING DIAGRAM 5-1. Outdoor Unit RAS-2M14U2AVG-E,-TR - 42 -...
  • Page 43 FILE NO. SVM-18020-2 5.2 Outdoor Unit RAS-2M18U2AVG-E,-TR - 43 -...
  • Page 44 FILE NO. SVM-18020-2 5.3 Outdoor Unit RAS-3M18U2AVG-E,-TR - 44 -...

  • Page 45: Specifications Of Electrical Parts

    FILE NO. SVM-18020-2 6. SPECIFICATIONS OF ELECTRICAL PARTS 6-1. Outdoor Unit No. Parts name Model name Rating Compressor 2M14 3-Phases(6-Poles);1075W KTN130D30UFZ 2M18 3-Phases (4-Poles);1100W DX136A1T-40N 3M18 Outdoor fan motor WDF-340-A43-1 Output 43W Reactor CH-57 10mH、16A Reactor CH-76 9.9mH、1A 4-way valve coil SQ-D27012-000752 DC12V PMV coil...

  • Page 46: Refrigerant Cycle Diagram

    FILE NO. SVM-18020-2 7. REFRIGERANT CYCLE DIAGRAM 7-1. Refrigerant cycle diagram ・RAS-2M14U2AVG-E,-TR Temp. measurement Indoor unit A B room B room Evaporator Cross flow fan Per 1 unit Max. : 20m Connecting pipe Min. : 2m Connecting pipe Thickness : 0,8mm...
  • Page 47 FILE NO. SVM-18020-2 ・RAS-2M18U2AVG-E,-TR Temp. measurement Indoor unit A B room B room Evaporator Cross flow fan Per 1 unit Max. : 20m Connecting pipe Min. : 2m Connecting pipe Thickness : 0,8mm Thickness : 0,8mm Total dia.6,35 dia.9,52 Max. : 30m Pressure Ｐ...
  • Page 48 FILE NO. SVM-18020-2 ・RAS-3M18U2AVG-E,-TR Temp. measurement Indoor unit A C room B room C room B room Evaporator Cross flow fan Per 1 unit Max. : 25m Min. : 2m Connecting pipe Connecting pipe Thickness : 0,8mm Total Thickness : 0,8mm dia.6,35 dia.9,52 Max.
  • Page 49 FILE NO. SVM-18020-2 7-2. Operation data Outdoor Unit : RAS-2M14U2AVG-E, -TR < Cooling > Temperature No. of Standard Heat exchanger Compressor Indoor unit Condition operating pressure pipe temperature Indoor fan revolution Indoor Outdoor units P (MPa) (rps) T1 ( T2 (...
  • Page 50 FILE NO. SVM-18020-2 Outdoor Unit : RAS-2M18U2AVG-E, -TR < Cooling > Temperature No. of Standard Heat exchanger Compressor Indoor unit Condition operating pressure pipe temperature Indoor fan revolution Indoor Outdoor units P (MPa) (rps) T1 ( T2 ( 1 unit High High High...
  • Page 51 FILE NO. SVM-18020-2 Outdoor Unit : RAS-3M18U2AVG-E, -TR < Cooling > Temperature No. of Standard Heat exchanger Compressor Indoor unit Condition operating pressure pipe temperature Indoor fan revolution Indoor Outdoor units P (MPa) (rps) T1 ( T2 ( 1 unit High High High...
  • Page 52 FILE NO. SVM-18020-2 Outdoor Unit : RAS-3M18U2AVG-E, -TR < Heating > Temperature No. of Standard Heat exchanger Compressor Indoor unit Condition operating pressure pipe temperature Indoor fan revolution Indoor Outdoor units P (MPa) (rps) T1 ( T2 ( 1 unit High High High...

  • Page 53: Control Block Diagram

    FILE NO. SVM-18020-2 8. CONTROL BLOCK DIAGRAM 8-1．Outdoor Unit (Inverter Assembly) RAS-2M14U2AVG-E,-TR Outdoor temp. sensor Gas side pipe temp. sensor Suction temp. sensor Evaporator temp. sensor Discharge temp. sensor MCC-1665 (Control P.C.B) A u nit P.M.V. Ｍ.Ｃ.Ｕ Driver A unit Serial Signal ・Inverter outdoor frequency control...
  • Page 54 FILE NO. SVM-18020-2 8-2．Outdoor Unit (Inverter Assembly) RAS-2M18U2AVG-E,-TR Outdoor temp. sensor Gas side pipe temp. sensor Suction temp. sensor Evaporator temp. sensor Discharge temp. sensor MCC-1665 (Control P.C.B) A unit P.M.V. Ｍ.Ｃ.Ｕ Driver A unit Serial Signal ・Inverter outdoor frequency control circuit Communication ・A/D converter function...
  • Page 55 FILE NO. SVM-18020-2 8-3．Outdoor Unit (Inverter Assembly) RAS-3M18U2AVG-E,-TR Outdoor temp. sensor Gas side pipe temp. sensor Suction temp. sensor Evaporator temp. sensor Discharge temp. sensor MCC-1665 (Control P.C.B) A u nit P.M.V. Ｍ.Ｃ.Ｕ Driver A unit Serial Signal ・Inverter outdoor frequency control circuit Communication ・A/D converter function...

  • Page 56: Operation Description

    FILE NO. SVM-18020-2 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 57 FILE NO. SVM-18020-2 9-2. Operation Description 1. Basic operation ........................58 1. Operation control ....................... 58 2. Operating mode selection when performing 2-room operation ......... 59 3. Cooling/Heating operation ....................59 2. Outdoor fan motor control ....................... 60 3. Capacity control ........................61 Current release control ......................

  • Page 58: Operation Control

    FILE NO. SVM-18020 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 59: Operating Mode Selection When Performing 2-Room Operation

    FILE NO. SVM-18020 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 60: Outdoor Fan Motor Control

    Fan motor ON Air conditioner Alarm 3) Fan lock display 4) Motor operates as shown in the table below. Cooling operation, dry operation RAS-2M14U2AVG-E,-TR Compressor revolution (rps) 〜20 〜42 〜55 56〜 Outdoor temp. sensor To Normal operation To≧38℃...
  • Page 61 FILE NO. SVM-18020-2 Item Operation flow and applicable data, etc. Description 2. Outdoor fan Heating operation 　RAS-2M14U2AVG-E,- motor control Compressor revolution (rps) 〜31 〜46 47〜 Outdoor temp. sensor To Normal operation To≧10℃ 0≦To＜10℃ -5≦To＜0℃ To＜-5℃ Sleep or quiet To≧10℃ 420*...

  • Page 62: Current Release Control

    FILE NO. SVM-18020-2 Item Operation flow and applicable data, etc. Description 3. Capacity RAS-2M18U2AVG-E,-TR control Operation No.of Combination Compressor Operation No.of Combination Compressor mode operating of indoor units revolution mode operating of indoor units revolution unit (kBTU) (rps) unit (kBTU) (rps) COOL 1 unit...

  • Page 63: Defrost Control (Only In Heating Operation)

    FILE NO. SVM-18020-2 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 64: Discharge Temperature Control

    FILE NO. SVM-18020-2 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 65: Intermittent Operation Control For Indoor Fans Of The Indoor Unit At Thermo-Off Side In Heating Operation

    FILE NO. SVM-18020-2 9-3. 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 66 FILE NO. SVM-18020-2 9-4-2. 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 SW01 & 02 at the same time for 5 sec or more Initial status D800 D801...
  • Page 67 FILE NO. SVM-18020-2 [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 SW01 for 5 seconds or more. D804 changes to slow flashing. 3) Push SW01 several times and then stop it at the point where LED display (D800 to D804) to be checked.
  • Page 68 FILE NO. SVM-18020-2 9-4-4. 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 SW01 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 69 FILE NO. SVM-18020-2 3) Pushing SW02, 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 70 FILE NO. SVM-18020-2 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 71 FILE NO. SVM-18020-2 9-4-5. 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 72 FILE NO. SVM-18020-2 9-4-6. 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 73: Installation Procedure

    FILE NO. SVM-18020-2 • 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 74 FILE NO. SVM-18020-2 10-2. Outdoor Unit 10-2-1. Accessory and Installation Parts CD-ROM Rubber cap Installation manual (Installation manual) (Water-proof) ∗1 F-GAS label Product Drain nipple specifi cation ∗1 Part that do not exist in RAS-2M14U2AVG-TR, RAS-2M18U2AVG-TR, RAS-3M18U2AVG-TR 10-2-2. Refrigerant Piping •...
  • Page 75 FILE NO. SVM-18020-2 10-2-5. Installation Draining Off the Water from the Outdoor Unit Install 2 waterproof rubber caps and the drain nipple to drain off the Installation Location ■ water from the outdoor unit. • Seal the knock-out holes and screw/thread areas tightly using a silicon •...
  • Page 76 FILE NO. SVM-18020 Refrigerant piping Pipe connection 1. Make wire and pipe connections for each indoor unit separately. 2. Align the centres of the connecting pipes and tighten the fl are nut as much CAUTION as possible with your fi ngers, then tighten the nut using a torque wrench. Be sure to tighten the nut at the specifi...
  • Page 77 FILE NO. SVM-18020 Air Purge Insulation of the Refrigerant Pipes ■ ■ • Insulate the refrigerant pipes for liquid and gas separately. From the sake of environmental protection, use a vacuum pump to extract the air during installation. * Prepare a 4 mm hexagon wrench. 1.
  • Page 78 FILE NO. SVM-18020 CAUTION 4. Connect the wires for the power source and each indoor unit. • Connect the connecting cable to the terminal as identifi ed by the • Incorrect/incomplete wiring will cause matching numbers on the terminal block of the indoor and the outdoor electrical fi...
  • Page 79 FILE NO. SVM-18020 3. Turn on the circuit breaker to supply electricity. Gas Leak Inspection ■ In the initial LED display status, D805 is lighted as below. Refer to the “ Gas Leak Inspection”. : ON, : OFF, : Rapid Flashing (5 times/sec.), ...
  • Page 80 FILE NO. SVM-18020 Pump-down Operation 4. Hold down SW01 for at least 5 seconds, and check that D800 is lighted and D804 light is fl ashing ( 1 time/sec.). Pump-down Operation (Recovering refrigerant) ■ D800 D801 D802 D803 D804 D805 ...

  • Page 81: How To Diagnose The Trouble

    FILE NO. SVM-18020 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 82 FILE NO. SVM-18020 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 83 FILE NO. SVM-18020 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 Display P.C.
  • Page 84 FILE NO. SVM-18020 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 condi- tion and indicates the information of the self-diagnosis on the display of the remote controller with the check codes.
  • Page 85 FILE NO. SVM-18020 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 86 FILE NO. SVM-18020 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 87 FILE NO. SVM-18020 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Outdoor P.C. Current on inverter circuit All OFF Flashes after 1. Remove connecting lead wire of the board is over limit in short time.
  • Page 88 FILE NO. SVM-18020 Block distinction Operation of diagnosis function Action and Judgment Check Check Display flashing Block Cause of operation conditioner code code error status Compressor drive output error. All OFF Flashes after 1. Check installation conditions such as Outdoor P.C. (Relation of voltage, current error is detected packed valve opening, refrigerant...
  • Page 89 FILE NO. SVM-18020 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 90 FILE NO. SVM-18020 Block distinction Operation of diagnosis function Action and Judgment Check Check Display Block Cause of operation conditioner code code flashing error status The others Return signal of the outdoor Indoor unit Flashes when 1. . Check power supply (Rate +10%) (including operates error is detected...
  • Page 91 FILE NO. SVM-18020 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 92 FILE NO. SVM-18020 Service Support Function (LED Display, Switch Operation) 1. Outline A various setup and operation check can be performed by the pushdown button switches (SW01,02) on the outdoor P.C. board(Display PCB). Operation part and Display part on MCC-1646 (Display PCB) Part No.
  • Page 93 FILE NO. SVM-18020 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 MCC-1646. 1.
  • Page 94 FILE NO. SVM-18020 :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.)  [Case thermo operation, Power supply error ] [1C] Is AC mains voltage correct? Confirm power supply (198 to 264V) construction.
  • Page 95 FILE NO. SVM-18020 :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 display P.C.
  • Page 96 FILE NO. SVM-18020 :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 97 FILE NO. SVM-18020 :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 98 FILE NO. SVM-18020 :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.)    *  [1E] [Discharge temp. error] Is there gas leak? Repair defective position.
  • Page 99 FILE NO. SVM-18020 :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 display P.C.
  • Page 100 FILE NO. SVM-18020 :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.) ∗ There is a possibility that it is one of the following errors. [21] Confirm LED on display P.C.
  • Page 101 TGa to TGc : Gas side temp. sensor TO, TE, TS, TGa to TGc Temperature (˚C) Outdoor Unit Part name Checking procedure Measure the resistance value of each winding by using the tester. Compressor RAS-2M14U2AVG-E,-TR Resisitance value (Model : KTN130D30UFZ) Position RAS-2M18U2AVG-E,-TR KTN130D30UFZ DX136A1T-40N RAS-3M18U2AVG-E,-TR...
  • Page 102 FILE NO. SVM-18020 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 103 FILE NO. SVM-18020 <MCC-1645> RAS-2M14U2AVG-E,-TR Electrolytic capacitors(760μF/400V) Lead wire for grounding P07(Black) Lead and connecter for Reactor Power supply connecting lead wire Lead and connecter for Reactor P21,P22(Gray) P01( Black), P02(White) P16,P17(White) Varisto r protective Fuse F03(25 0V,3.15A,plastic case) Power supply protective fuse...
  • Page 104 FILE NO. SVM-18020 <MCC-1645> RAS-2M18U2AVG-E,-TR RAS-3M18U2AVG-E,-TR Lead wire for grounding Electrolytic capacitors(760μF/400V) P07(Black) Power supply connecting lead wire Lead and connecter for Reactor P01( Black), P02(White) Lead and connecter for Reactor P21,P22(Gray) P16,P17(White) Varisto r protective Fuse F03(25 0V,3.15A,plastic case) Power supply protective fuse F01(250V,25A) Case th ermo connector...
  • Page 105 FILE NO. SVM-18020 <MCC-1665> RAS-2M14U2AVG-E,-TR RAS-2M18U2AVG-E,-TR Indoor/Outdoor communication wire protective Fuse F03(250V,3.15A,plastic case) Power, Alarm display LED D801(Red) Indoor/Outdoor communication signal UART communication connector LED D501,D508(Green,Outdoor→Indoor) CN802(Blue) Connector for display CN805(White) Temp. sensor connector TS CN603(White) TO CN602(White) TE CN601(White)
  • Page 106 FILE NO. SVM-18020 <MCC-1665> RAS-3M18U2AVG-E,-TR Indoor/Outdoor communication wire protective Fuse F03(250V,3.15A,plastic case) Power, Alarm display LED D801(Red) Indoor/Outdoor communication signal LED UART communication connector D501,D508,D515(Green,Outdoor→Indoor) CN802(Blue) Connector for display CN805(White) Temp. sensor connector TS CN603(White) TO CN602(White) TE CN601(White) TD CN600(White) TGC CN606(Green) TGB CN605(Red) TGA CN604(Yellow)

  • Page 107: How To Replace The Main Parts

    FILE NO. SVM-18020 12. HOW TO REPLACE THE MAIN PARTS 12-1. Outdoor Unit No. Part name Procedure Remarks ① Common procedure Never forget to put on the gloves at working time; otherwise an injury will be caused by the parts etc. 1.Detachment 1) Stop operation of the air conditioner, and turn off the main switch of the...
  • Page 108 FILE NO. SVM-18020 No. Part name Procedure Remarks ② Front 1.Detachment Motor base cabinet 1) Perform work 1 of ①. 2) Remove the front cabinet. Inverter cover (ST1TØ4×10L 2pcs. : fix to motor base) (ST1TØ4×10L 1pc. : fix to inverter cover) (ST1TØ4×10L 4pcs.
  • Page 109 FILE NO. SVM-18020 No. Part name Procedure Remarks Inverter 1) Perform works 1 of ① and ②. ③ assembly Never disassemble the inverter until 1minute after the power supply was turned off because there is a fear that an electric shock may occur. 2) Remove screws.
  • Page 110 FILE NO. SVM-18020 No. Part name Procedure Remarks ③ Inverter 10) Disconnect the leads connected to the other assembly parts from the P.C. assembly. (continued) These connectors have the lock. The lock must be released before they are disconnected. Main P.C. board CN300 : Outdoor fan motor (3P : white) CN500 : Thermostat for compressor (2P : blue) *only 3M18 and 2M18...
  • Page 111 FILE NO. SVM-18020 No. Part name Procedure Remarks ④ Side cabinet 1.Side cabinet (right) 1) Perform works 1 of ① and ②. 2) Remove screws. (ST1TØ4×10L 2pcs. : fix to inverter assembly) (ST1TØ4×10L 4pcs. : fix to valve plate) (ST1TØ4×10L 2pcs. : fix to base plate) 2.Side cabinet (left) 1) Perform works 1 of ①...
  • Page 112 FILE NO. SVM-18020 No. Part name Procedure Remarks ⑥ Compressor 1) Perform works from ① to ⑤. 2) Recover the refrigerant gas form the outdoor unit. Partition 3) Remove partition. (ST1TØ4×10L 5pcs.) 4) Remove the sound-insulation material. 5) Remove terminal cover of the compressor, and disconnect lead wire of the compressor and the comp.
  • Page 113 FILE NO. SVM-18020 No. Part name Procedure Remarks ⑧ 1. Detachment Electronic expansion 1) Perform step 1 in 2 , all the steps in 3 and valve coil 1 in 4 . 2) Turn the coil by 180 degrees then remove by pull it upward.
  • Page 114 FILE NO. SVM-18020 No. Part name Procedure Remarks ⑩ TE sensor (outdoor heat exchanging temperature sensor) • Attachment With the sensor leads pointing in the direction shown in the figure, install the sensor onto the condenser output pipe. ⑪ TS sensor (Suction pipe temperature sensor) •...
  • Page 115 FILE NO. SVM-18020 No. Part name Procedure Remarks High pressure 1.Detachment ⑮ switch 1) Perform work of ①. 2) Recover the refrigerant gas form the outdoor unit. 3) Perform work of ②, ③, ④ and ⑤. 4) Remove the sound-insulation material and partition. 5) Remove the high pressure switch by the burner.

  • Page 116: Exploded Views And Parts List

    FILE NO. SVM-18020 13. EXPLODED VIEWS AND PARTS LIST 13-1. Outdoor Unit RAS-2M14U2AVG-E,-TR 41, 37 40, 36 42, 38 Location Part Location Part Description Description 43T42345 BASE PLATE ASSEMBLY 43T47404 BONNET, 9.52 DIA 43T00560 LEFT CABINET 43T46358 VALVE;PACKED 6.35 DIA...
  • Page 117 FILE NO. SVM-18020 13-2. Outdoor Unit RAS-2M18U2AVG-E,-TR 41, 37 40, 36 42, 38 Location Part Location Part Description Description 43T42345 BASE PLATE ASSEMBLY 43T46358 VALVE;PACKED 6.35 DIA 43T00560 LEFT CABINET 43T46366 VALVE;PACKED 9.52 DIA 43T00672 RIGHT SIDE CABINET ASSEMBLY 43T46469 BODY PMV 43T00561 UPPER CABINET...
  • Page 118 13-3. Outdoor Unit RAS-3M18U2AVG-E,-TR 41, 37 40, 36 42, 38 Location Part Location Part Description Description 43T42345 BASE PLATE ASSEMBLY 43T46358 VALVE;PACKED 6.35 DIA 43T00560 LEFT CABINET 43T46366 VALVE;PACKED 9.52 DIA 43T00672 RIGHT SIDE CABINET ASSEMBLY 43T46374 VALVE;PACKED 12.7DIA(H4) 43T00561 UPPER CABINET 43T46469 BODY PMV...
  • Page 119 FILE NO. SVM-18020 13-4. Inverter Assembly RAS-2M14U2AVG-E,-TR Location Part Location Part Description Description 43T6W305 PCB BOARD ASSY 43T50353 TEMPERATURE SENSOR 43T6W312 PCB BOARD ASSY 43T50360 TC-SENSOR(TO) 43T61325 BASE,PC BORAD 43T50334 TEMPERATURE SENSOR 43T61320 BASE, PC BOARD 43T50361 SENSOR-TEMP 43T6V418 PC BOARD ASSY(MCC-1646)-LED...
  • Page 120 FILE NO. SVM-18020 13-5. Inverter Assembly RAS-2M18U2AVG-E,-TR Location Part Location Part Description Description 43T6W304 PCB BOARD ASSY 43T50353 TEMPERATURE SENSOR 43T6W311 PCB BOARD ASSY 43T50360 TC-SENSOR 43T61325 BASE,PC BORAD 43T50334 TEMPERATURE SENSOR 43T61320 BASE, PC BOARD 43T50361 SENSOR-TEMP 43T6V418 PC BOARD ASSY(MCC-1646)-LED 43T50362 SENSOR-TEMP 43T60423...
  • Page 121 FILE NO. SVM-18020 13-6. Inverter Assembly RAS-3M18U2AVG-E,-TR Location Part Location Part Description Description 43T6W304 PCB BOARD ASSY 43T50360 TC-SENSOR(TO) 43T6W310 PCB BOARD ASSY 43T50334 TEMPERATURE SENSOR 43T61325 BASE,PC BORAD 43T50361 SENSOR-TEMP 43T61320 BASE, PC BOARD 43T50362 SENSOR-TEMP 43T6V418 PC BOARD ASSY(MCC-1646)-LED 43T50363 SENSOR-TEMP 43T60423...
  • Page 122 TOSHIBA CARRIER ETHAILANDJ C0. LTD.

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