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Toshiba RAV-GM901UTP Series Service Manual
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Toshiba RAV-GM901UTP Series Service Manual

Toshiba RAV-GM901UTP Series Service Manual

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FILE NO. SVM-20039
SERVICE MANUAL
AIR-CONDITIONER
(SPLIT TYPE)
INDOOR UNIT
<4-way cassette type>
RAV-GM901UTP Series
R32
March, 2020

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Summary of Contents for Toshiba RAV-GM901UTP Series

  • Page 1 FILE NO. SVM-20039 SERVICE MANUAL AIR-CONDITIONER (SPLIT TYPE) INDOOR UNIT <4-way cassette type> RAV-GM901UTP Series March, 2020...

  • Page 2: Table Of Contents

    Original instruction Adoption of New Refrigerant This Air Conditioner is a new type which adopts a new refrigerant HFC (R32) instead of the conventional refrigerant R22 in order to prevent destruction of the ozone layer. CONTENTS SAFETY CAUTION ........3 1. CONSTRUCTION VIEWS (EXTERNAL VIEWS) ......15 2.

  • Page 3: Safety Caution

    The qualified service person is a person who installs, repairs, maintains, relocates and removes the air conditioners made by Toshiba Carrier Corporation. He or she has been trained to install, repair, maintain, relocate and remove the air conditioners made by Toshiba Carrier Corporation...
  • Page 4 Definition of Protective Gear When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective gloves and ‘safety’ work clothing. In addition to such normal protective gear, wear the protective gear described below when undertaking the special work detailed in the table below.
  • Page 5 Warning Indications on the Air Conditioner Unit [Confirmation of warning label on the main unit] Confirm that labels are indicated on the specified positions If removing the label during parts replace, stick it as the original. WARNING WARNING ELECTRICAL SHOCK HAZARD ELECTRICAL SHOCK HAZARD Disconnect all remote electric power supplies Disconnect all remote electric...
  • Page 6 PRECAUTIONS FOR SAFETY The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual. DANGER Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit breaker for both the indoor and outdoor units to the OFF position. Otherwise, electric shocks may result.
  • Page 7 WARNING Before starting to repair the air conditioner, read carefully through the Service Manual, and repair the air conditioner by following its instructions. Only qualified service person (*1) is allowed to repair the air conditioner. Repair of the air conditioner by unqualified person may give rise to a fire, electric shocks, injury, water leaks and / or other problems.
  • Page 8 Do not modify the products. Do not also disassemble or modify the parts. It may cause a fire, electric shock or injury. Prohibition of modification. When any of the electrical parts are to be replaced, ensure that the replacement parts satisfy the specifications given in the Service Manual (or use the parts contained on the parts list in the Service Manual).
  • Page 9 After repair work, surely assemble the disassembled parts, and connect and lead the removed wires as before. Perform the work so that the cabinet or panel does not catch the inner wires. If incorrect assembly or incorrect wire connection was done, a disaster such as a leak or fire is caused Assembly / at user’s side.
  • Page 10 When the service panel of the outdoor unit is to be opened in order for the compressor or the area around this part to be repaired immediately after the air conditioner has been shut down, set the circuit breaker to the OFF position, and then wait at least 10 minutes before opening the service panel. If you fail to heed this warning, you will run the risk of burning yourself because the compressor pipes and other parts will be very hot to the touch.
  • Page 11 Declaration of Conformity Manufacturer: TOSHIBA CARRIER (THAILAND) CO., LTD. 144 / 9 Moo 5, Bangkadi Industrial Park, Tivanon Road, Amphur Muang, Pathumthani 12000, Thailand TCF holder: TOSHIBA CARRIER EUROPE S.A.S Route de Thil 01120 Montluel FRANCE Hereby declares that the machinery described below:...
  • Page 12 Specifications Sound power level (dBA) Weight (kg) Model Main unit (Ceiling panel) Cooling Heating ∗ ∗ 24 (4.2) RAV-GM901UTP-E ∗ ∗ 24 (4.2) RAV-GM901UTP-TR ∗ : Under 70 dBA - 12 -...
  • Page 13 • Refrigerant (R32) This air conditioner adopts a refrigerant HFC (R32) which does not deplete the ozone layer. 1. Safety Caution Concerned to Refrigerant R32 The pressure of R32 is high 1.6 times of that of the former refrigerant (R22). Accompanied with change of refrigerant, the refrigerating oil has been also changed.
  • Page 14 4. Tools 1. Required Tools for R32 Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types. 1) Tools exclusive for R32 (Those which cannot be used for conventional refrigerant (R22)) 2) Tools exclusive for R32 but can be also used for conventional refrigerant (R22) 3) Tools commonly used for R32 and for conventional refrigerant (R22) The table below shows the tools exclusive for R32 and their interchangeability.

  • Page 15: Construction Views (External Views)

    1. CONSTRUCTION VIEWS (EXTERNAL VIEWS) Indoor Unit 1000 or more 860 to 910 Ceiling open dimension An obstacle 1000 or more The space that is necessary for equipping and service Take-in port of wiring Bottom face of ceiling Indoor unit Bottom face of ceiling Refrigerant pipe connecting port Drain pipe...

  • Page 16: Systematic Refrigerating Cycle Diagram

    2. SYSTEMATIC REFRIGERATING CYCLE DIAGRAM Indoor Unit • Single type (Combination of 1 indoor unit and 1 outdoor unit) (Indoor unit) Distributor (Strainer incorporated) TCJ sensor Strainer Air heat exchanger TC sensor Heating Cooling Refrigerant pipe Refrigerant pipe at liquid side at gas side (Outer dia : ØB) (Outer dia : ØA)

  • Page 17: Wiring Diagram

    3. WIRING DIAGRAM Indoor Unit 4-Way Cassette Type - 17 -...

  • Page 18: Specifications Of Electrical Parts

    4. SPECIFICATIONS OF ELECTRICAL PARTS Indoor Unit Parts name Type Specifications Output (Rated) 150 W Fan motor ICF-280-150-1 Thermo. sensor (TA-sensor) 328 mm 10 kΩ at 25°C Heat exchanger sensor (TCJ-sensor) Ø6 mm, 1000 mm 10 kΩ at 25°C Heat exchanger sensor (TC-sensor) Ø6 mm, 1000 mm 10 kΩ...

  • Page 19: Indoor Control Circuit

    5. INDOOR CONTROL CIRCUIT 5-1. Indoor Controller Block Diagram 5-1-1. Connection of Wired (Simple) Remote Controller Wired simple Schedule Display LCD Function setup Display LCD LCD driver Display LED Key switch Function setup Key switch DC5V DC5V Remote controller Power circuit communication circuit ∗3 Power...
  • Page 20 5-1-2. Connection of Wireless Remote Controller Kit Indoor unit #1 (Header) Wireless remote controller kit Receiver P .C. board Display LED Buzzer DC5V Power Remote controller circuit communication circuit (Follower) (Follower) Indoor control P .C. board (MCC-1570) DC20V Remote controller EEPROM communication circuit DC5V...
  • Page 21 5-1-3. Connection of Both Wired (Simple) Remote Controller and Wireless Remote Controller Kit Indoor unit #1 (Header) Wired (simple) master remote controller Wireless remote controller kit Schedule timer (Max. 2 units) Display LED Receiver P.C. board Display Function Display setup driver Receive Function setup SW...

  • Page 22: Control Specifications

    5-2. Control Specifications Item Outline of specifications Remarks When power 1) Distinction of outdoor unit supply is reset When the power supply is reset, the outdoors are distin- guished and the control is selected according to the distinguished result. 2) Setting of indoor fan speed and existence of air direction adjustment Based on EEPROM data, select setting of the indoor fan Air speed (rpm)/...
  • Page 23 Item Outline of specifications Remarks Room temp. 2) Using the CODE No. 06, the setup temperature in heating Shift of suction control operation can be corrected. temperature in heating (Continued) operation Setup data Setup temp. correction +0°C +2°C +4°C +6°C Setting at shipment Setup data Automatic...
  • Page 24 Item Outline of specifications Remarks Air speed selection 1) Operation with (HH), (H), (L) or [AUTO] mode is carried HH > H+ > H > L+ > out by the command from the remote controller. L > UL 2) When the air speed mode [AUTO] is selected, the air speed varies by the difference between Ta and Ts.
  • Page 25 Item Outline of specifications Remarks Air speed Standard Type 1 Type 3 Type 6 CODE No. selection Selection of high [5d] (Continued): ceiling type SW501 (1)/(2) OFF/OFF ON/OFF OFF/ON ON/ON CODE No.: HEAT COOL HEAT COOL HEAT COOL HEAT COOL [5d] or selection of high ceiling on P .C.
  • Page 26 Item Outline of specifications Remarks Cool air discharge 1) In heating operation, the indoor fan is controlled In D and E zones, the preventive control based on the detected temperature of Tc sensor or priority is given to air Tcj sensor. As shown below, the upper limit of the volume selection setup revolution frequency is restricted.
  • Page 27 Item Outline of specifications Remarks High-temp. 1) The heating operation is performed as follows based on the release control detected temperature of Tc sensor or Tcj sensor. • When [M] zone is detected, the commanded frequency is However this control is decreased from the real operation frequency.
  • Page 28 Item Outline of specifications Remarks Louver control 1) Louver position setup • When the louver position is changed, the position moves necessarily to downward discharge position once to return to the set position. • The louver position can be set up in the following operation range. In cooling/dry operation In heating/fan operation •...
  • Page 29 Item Outline of specifications Remarks Louver control <<Selection of Swing mode>> (Continued) • For the Swing mode, the following three types of modes are SWING/FIX selectable and settable by keeping Swing/Direction button pushed for 4 seconds or more on the remote controller. Standard (4 pieces: same phase) swing →...
  • Page 30 Item Outline of specifications Remarks Louver control • If there is the locked louver in the unit, [ ] goes on the For the setting (Continued) remote controller screen. operation, refer to [How to set louver • While the following controls are performed, the louvers lock] of Installation operate even if executing the louver lock.
  • Page 31 Item Outline of specifications Remarks Central control mode 1) Setting at the centerl controller side enables to select the selection contents which can be operated on the remote controller at indoor unit side. 2) Setup contents • 64 line central controller (TCB-SC642TLE2) Display at remote controller side [Individual]: Operated on the remote controller...
  • Page 32 Item Outline of specifications Remarks DC motor 1) When the fan operation has started, positioning of the stator and the rotor are performed. (Moves slightly with tap sound) 2) The motor operates according to the command from the indoor controller. Notes) •...
  • Page 33 Item Outline of specifications Remarks 8°C heating/ 1) This functional is intended for the cold latitudes and performs Frost protective objective heating operation (8°C heating operation). operation 2) This function is valid only for combination with the outdoor In a group connection, units (Super Digital Inverter (SDI) 4-series outdoor units).

  • Page 34: Indoor Print Circuit Board

    5-3. Indoor Print Circuit Board <MCC-1570> - 34 -...
  • Page 35 Optional Connector Specifications of Indoor P.C. Board - 35 -...

  • Page 36: Troubleshooting

    6. TROUBLESHOOTING 6-1. Summary of Troubleshooting <Wired remote controller type> 1. Before troubleshooting 1) Required tools/instruments – • screwdrivers, spanners, radio cutting pliers, nippers, push pins for reset switch • Tester, thermometer, pressure gauge, etc. 2) Confirmation points before check a) The following operations are normal.
  • Page 37 <Wireless remote controller type> 1. Before troubleshooting 1) Required tools/instruments – • screwdrivers, spanners, radio cutting pliers, nippers, etc. • Tester, thermometer, pressure gauge, etc. 2) Confirmation points before check a) The following operations are normal. 1. Compressor does not operate. •...

  • Page 38: Troubleshooting

    6-2. Troubleshooting 6-2-1. Outline of judgment The primary judgment to check whether a trouble occurred in the indoor unit or outdoor unit is carried out with the following method. Method to judge the erroneous position by flashing indication on the display part of the indoor unit (sensors of the receiving part) The indoor unit monitors the operating status of the air conditioner, and the blocked contents of self-diagnosis are displayed restricted to the following cases if a protective circuit works.
  • Page 39 Lamp indication Check code Cause of trouble occurrence Operation Timer Ready ⎫ Heat exchanger sensor (TCJ) error ⎪ Heat exchanger sensor (TC) error Indoor unit sensor error ⎬ ⎪ Heat exchanger sensor (TA) error Alternate flash ⎭ Discharge temp. sensor (TD) error ⎫...
  • Page 40 6-2-2. Others (Other than Check Code) Lamp indication Check code Cause of trouble occurrence Operation Timer Ready — During test run Simultaneous flash Operation Timer Ready Disagreement of cool/heat — (Automatic cool/heat setting to automatic cool/heat prohibited model, or setting of heating to cooling-only model) Alternate flash - 40 -...
  • Page 41 - 41 -...
  • Page 42 Error mode detected by indoor unit Operation of diagnostic function Judgment and measures Check Status of Cause of operation Condition code air conditioner 1. Check cables of remote controller and communication adapters. No communication from remote Stop Displayed when controller (including wireless) and •...
  • Page 43 Error mode detected by remote controller or central controller (TCC-LINK) Operation of diagnostic function Judgment and measures Status of Check code Cause of operation Condition air conditioner Power supply error of remote controller, Indoor EEPROM error 1. Check remote controller inter-unit wiring. No communication with master indoor unit 2.
  • Page 44 6-2-4. Diagnostic Procedure for Each Check Code (Indoor Unit) Check code [E01 error] Correct inter-unit cable Is inter-unit cable of A and B normal? of remote controller Is there no disconnection or Correct connection of connector. contact error of connector on harness Check circuit wiring.
  • Page 45 [E04 error] Is group address setup of Does outdoor operate? Check CODE No. [14]. remote controller correct? Are wiring in indoor unit and Correct wiring and 1, 2, 3 inter-unit cables correct? inter-unit cables. Are wirings of terminal blocks Correct wiring of connector and terminal blocks.
  • Page 46 [E18 error] Is inter-unit cable Correct inter-unit cable of A and B normal? of remote controller. Is there no disconnection or contact error of connector Correct connection of connector. Check circuit wiring. on harness from terminal block of indoor unit? Is group control operation? Check power connection status of indoor unit...
  • Page 47 [L20 error] Are wiring connections to communication lines Correct wiring connection. U3 and U4 normal? Is not the multiple same central Correct central control system address. control system addresses connected? Check central controller (including network adapter) and indoor P.C. board (MCC-1570). Defect →...
  • Page 48 [P10 error] Is connection of float switch connector Correct connection (Indoor control board CN34) of connector. normal? Does float switch work? Is circuit wiring normal? Check and correct wiring and wire circuit. Does drain pump work? Are connector pins 1 and 2 Is power of at drain pump unit side shorted drain pump turned on? ∗...
  • Page 49 [P12 error] Turn off the power. Is there no connection error or disconnection on connectors CN333 Correct connection and CN334 of indoor unit P.C. board of connector. (MCC-1570)? CN333 Remove connectors CN333 and CN334 of indoor unit P.C. board (MCC-1570). CN334 Does the fan rotate without trouble Replace indoor fan motor.
  • Page 50 [P19 error] Is operation of 4-way valve normal? Are 1.3 to 1.6kΩ applied to (Check the pipe temp., etc. Replace 4-way valve coil. resistance value of 4-way valve coil ? during cooling/heating operation. Defective Check outdoor P.C. board operation. Check outdoor P.C. board. Defective →...
  • Page 51 [F02 error] Is connection of TC sensor connector Correct connection of connector. (CN101 on Indoor P.C. board) correct? Are characteristics of Replace TC sensor. TC sensor resistance value normal? ∗ Refer to Characteristics-2. Check indoor P.C. board (MCC-1570). Defect → Replace [F01 error] Is connection of TCJ sensor connector Correct connection of connector.
  • Page 52 [C06 error] (“1:1 model” connection interface) n i l n i l ∗1 Correct connection of connector. Is connection of connector normal? ∗1 TCC-LINK central: CN51 of “1:1 model” connection interface (TCC-LINK adapter) P.C. board (MCC-1440) and CN050 of indoor P.C. board Check connection of A and B terminal blocks.
  • Page 53 [E03 error] (Header indoor unit) [E03 error] is detected when the indoor unit cannot receive a signal from the remote controller (also central controller). Check A and B remote controllers and communication lines of the central control system U3 and U4. As communication is impossible, this check code [E03] is not displayed on the remote controller and the central controller.
  • Page 54 Temperature – Resistance value characteristic table Temperature sensor TA, TC, TCJ, TE, TS, TO sensors TD, TL sensors Representative value Representative value Resistance value (kΩ Ω Ω Ω Ω ) Resistance value (kΩ Ω Ω Ω Ω ) Temperature Temperature (°C) (°C) (Minimum value) (Standard value) (Maximum value)
  • Page 55 Winding Resistance of Fan Motor Checking procedure Part name ICF-280-150-1 Measure the resistance value of each winding by using the tester. RAV-GM901UTP* Fan motor inside wiring diagram ICF-280-150-1 t i s Black – Red 32.4±3.3 Ω Black – White 32.4±3.3 Ω Red – White 32.4±3.3 Ω...

  • Page 56: Replacement Of Service P.c. Board

    7. REPLACEMENT OF SERVICE P.C. BOARD Indoor Unit <Note: when replacing the P.C. board for indoor unit servicing> The nonvolatile memory (hereafter called EEPROM, IC503) on the indoor unit P .C. board before replacement includes the model specific type information and capacity codes as the factory-set value and the important setting data which have been automatically or manually set when the indoor unit is installed, such as system/ indoor/group addresses, high ceiling select setting, etc.
  • Page 57 [1] Setting data read out from EEPROM The setting data modified on the site, other than factory-set value, stored in the EEPROM shall be read out. TEST Step 1 Push button on the remote controller simultaneously for more than 4 seconds. ∗...
  • Page 58 Setting 4-way cassette Indoor Unit model only 1. Using the set temperature buttons, set “ ” to the CODE No. (DN). 2. Using the timer time buttons, set the data. (0002) • Push button. (The setting completes if the setting data are displayed.) Connector (CN504) If the plug for short-circuit is attached on the P.C.
  • Page 59 Step 4 Write the on-site setting data to the EEPROM, such as address setting, etc. Perform the steps 1 and 2 above again. Step 5 Change the CODE No. (DN) to “ ” by pushing buttons for the temperature setting. (this is the setting for the filter sign lighting time.) Step 6 Check the setting data displayed at this time with the setting data put down in [1].
  • Page 60 Table 1. Setting data (CODE No. table (example)) Item Setting data Factory-set value Filter sign lighting time Depending on Type 0000: Standard Filter pollution level Central control address 0099: Not determined 0002: +2°C Heating suction temperature shift (flooring installation type: 0) Cooling only 0000: Heat pump Type...

  • Page 61: Setup At Local Site And Others

    8. SETUP AT LOCAL SITE AND OTHERS 8-1. Indoor Unit 8-1-1. Test Run Setup on Remote Controller <Wired remote controller> TEST 1. When pushing button on the remote controller for 4 seconds or more, “TEST” is displayed on LC display. ON / OFF Then push button.
  • Page 62 8-1-2. Forced Defrost Setup of Remote Controller (For wired remote controller only) (Preparation in advance) TEST Push buttons simultaneously for 4 seconds or more on the remote controller. (Push buttons while the air conditioner stops.) The first displayed unit No. is the master indoor unit address in the group control. Every pushing UNIT button, the indoor unit No.
  • Page 63 8-1-4. Function Selection Setup <Procedure> Perform setting while the air conditioner stops. TEST Push buttons simultaneously for 4 seconds or more. The first displayed unit No. is the master indoor unit address in the group control. In this time, fan and louver of the selected indoor unit operate. UNIT LOUVER Every pushing button (button at left side), the indoor unit No.
  • Page 64 Function selection CODE No. (DN) list Item Contents At shipment from factory Filter sign lighting time 0002: 2500H 0003: 5000H According to type 0004: 10000H 0005: Clogging sensor used 0000: Standard Filter stain level 0000: Standard 0001: Heavy stain (Half of standard time) 0001: No.1 unit 0064: No.64 unit Central control address...
  • Page 65 Item Contents At shipment from factory Set when compressor-ON time is 10 to 60 minutes. Self-clean operation time 0002: 1 hour When ON-time is 60 minutes or more, the double of this operation time setting is set. Selection of louver horizontal discharge 0000: Smudging-less setting 0000: Smudging- position...
  • Page 66 8-1-5. Wiring and Setting of Remote Controller Control 2-remote controller control <Wired remote controller> (Controlled by 2 remote controllers) How to set wired remote controller This control is to operate 1 or multiple indoor units as sub remote controller are operated by 2 remote controllers. Change DIP switch inside of the rear side of the (Max.
  • Page 67 <Wireless remote controller> Remote controller address (A-B selection) setting • When two or more signal receiving units are installed in a room, a unique address can be set for each signal receiving unit to prevent interference. • Address (A-B selection) must be changed on both signal receiving unit and wireless remote controller.
  • Page 68 Wireless remote controller (A-B selection) Using 2 wireless remote controllers for the respec- tive air conditioners, when the 2 air conditioners are closely installed. Wireless remote controller B setup 1. Start the air conditioner. 2. Point the wireless remote controller at the indoor unit.
  • Page 69 8-1-6. Monitor Function of Remote Controller Switch Calling of sensor temperature display <Contents> Each data of the remote controller, indoor unit and outdoor unit can be understood by calling the service monitor mode from the remote controller. <Procedure> TEST Push buttons simultaneously for 4 seconds to call the service monitor mode.
  • Page 70 Calling of error history <Contents> The error contents in the past can be called. <Procedure> TEST Push buttons simultaneously for 4 seconds or more to call the service check mode. Service Check goes on, the CODE No. is displayed, and TEMP.
  • Page 71 Indoor unit power-ON sequence • The unit without power feed waits entirely → Waiting status is released by system start Power ON • Reboot when power is fed on the way <By indoor unit which receives power feed from outdoor unit> <Automatic address judgment>...

  • Page 72: Setup At Local Site / Others

    8-2. Setup at Local Site / Others Model name: TCB-PCNT30TLE2 8-2-1. 1:1 Model Connection Interface (TCC-LINK adapter) 1. Function This model is an optional P.C. board to connect the indoor unit to 1:1 model connection interface. 2. Microprocessor block diagram Indoor unit Central controller 1:1 model connection interface...
  • Page 73 4. Wiring Specifications • Use 2-core with no polar wire. No. of wires Size • Match the length of wire to wire length of the central control system. If mixed in the SMMS system, the wire length is Up to 1000m: twisted wire 1.25mm Up to 2000m: twisted wire 2.0mm lengthened with all indoor/outdoor inter-unit wire length at side.

  • Page 74: How To Set Up Central Control Address Number

    6. External view of P.C. board assembly Terminator (SW01) 7. Address setup In addition to set up the central control address, it is necessary to change the indoor unit number. (Line/Indoor/Group address). For details, refer to 1:1 model connection interface Installation Manual. 8-3.
  • Page 75 How to confirm the central control address (New function for AMT32E remote controller) <Procedure> It can be confirmed even during operation or stopping. UNIT LOUVER UNIT LOUVER Push Push b button f utton for 4 seconds or more or 4 seconds or more. . In the frame at left side of the remote controller screen, the lighting set contents are displayed.

  • Page 76: How To Set Up Type Of Swing

    ∗ Dual swing 8-4. How to set up type of swing (Recommended for heating operation) SWING/FIX • The adjoined louvers repeat horizontal Push for 4 seconds or more during stop of discharge/Downward discharge alternately the operation. to clear irregularity of the temperature in •...

  • Page 77: How To Set Louver Lock (Louver Fix)

    8-5. How to set louver lock (Louver fix) Refrigerant pipe UNIT LOUVER Push (At the right side of the button) for 4 seconds or more during stop of the operation. Electric parts box • flashes. UNIT LOUVER Push (At the left side of the button) and Drain pipe select the unit to be set.

  • Page 78: Address Setup

    9. ADDRESS SETUP 9-1. Address Setup <Address setup procedure> When an outdoor unit and an indoor unit are connected and they are twin-triple, or when an outdoor unit is connected to each indoor unit respectively in the group operation even if multiple refrigerant lines are provided, the automatic address setup completes with power-ON of the outdoor unit.

  • Page 79: Address Setup & Group Control

    9-2. Address Setup & Group Control <Terminology> Indoor unit No. : N – n = Outdoor unit line address N (Max. 30) – Indoor unit address n (Max. 64) Group address : 0 = Single (Not group control) 1 = Header unit in group control 2 = Follower unit in group control Header unit (= 1) : The representative of multiple indoor units in group operation sends/receives signals to/ from the remote controllers and follower indoor units.
  • Page 80 4. Single group operation • Each indoor unit controls the outdoor unit individually. Header/Sub Header/Sub Header/Master Header/Sub Header/Sub 5. Multiple groups operation (Manual address setting) Header/Sub Header/Sub Follower/Sub Header/Master Follower/Sub Follower/Sub • Master unit: The master unit receives the indoor unit data (thermo status) of the sub (Without identical line address &...
  • Page 81 9-2-2. Automatic Address Example from Unset Address (No miswiring) 1. Standard (One outdoor unit) (1-1) (1-2) (1-1) (1-2) (1-3) Individual Header/Master Follower/Sub Header/Sub Follower/Master Follower/Sub (Header/Master) Only turning on source power supply (Automatic completion) 2. Group operation (Multiple outdoor units = Multiple indoor units with serial communication only, without twin) Header/Sub Header/Sub Header/Master...

  • Page 82: Address Setup (Manual Setting From Remote Controller)

    9-3. Address Setup (Manual Setting from Remote Controller) In case that addresses of the indoor units will be (Example of 2-lines wiring) (Real line: Wiring, Broken line: Refrigerant pipe) determined prior to piping work after wiring work Outdoor Outdoor • Set an indoor unit per a remote controller. 1 2 3 1 2 3 •...

  • Page 83: Confirmation Of Indoor Unit No. Position

    9-4. Confirmation of Indoor Unit No. Position 1. To know the indoor unit addresses though position of the indoor unit body is recognized • In case of individual operation (Wired remote controller : indoor unit = 1 : 1) (Follow to the procedure during operation) <Procedure>...
  • Page 84 <Maintenance/Check list> Aiming in environmental preservation, it is strictly recommended to clean and maintain the indoor/outdoor units of the operating air conditioning system regularly to secure effective operation of the air conditioner. It is also recommended to maintain the units once a year regularly when operating the air conditioner for a long time.

  • Page 85: Detachments

    10. DETACHMENTS 4-Way Cassette Type Part name Procedure Remarks Suction grille Suction grille Knobs of the XCAUTIONX suction grille hook Be sure to put on the gloves at disassembling work; otherwise an injury will be caused by a part, etc. Adjust Ceiling panel 1.
  • Page 86 Part name Procedure Remarks Electric parts cover (Continued) 1. Detachment Adjust corner cap Adjust corner cap 1) Pull knob of the adjust corner cap to the arrow direction, remove strap of the adjust corner cap from pin of the panel and then remove all the 4 corners of the cap.
  • Page 87 Part name Procedure Remarks 1. Detachment Ceiling panel Clamp 1) Carry out works of item 1 of and item 1 of 3 . Louv Louver motor wir Louver motor wiring er motor wiring 2) Remove the flap connector (CN510, White, 20P) connected to the control P .C.
  • Page 88 Part name Procedure Remarks 1. Detachment Control Clamp P .C. board 1) Carry out work of item 1 of 2) Remove connectors which are connected from the control P .C. board to the other parts and then remove wiring from the clamp.
  • Page 89 Part name Procedure Remarks 1. Detachment Drain cap Drain cap (outside) 1) Carry out work of item 1 of 2) Loosen screws (3 positions) fixing the drain cap (outside) and then turn the drain cap to the arrow mark direction to remove it. CLOSE CLOSE CLOSE...
  • Page 90 Part name Procedure Remarks 1. Detachment Fan motor Fixing screw A 1) Carry out work of item 1 of 2) Remove connectors which are connected from the control P .C. board to the other parts and then remove each wiring from the clamp.
  • Page 91 Part name Procedure Remarks 2. Attachment Fan motor M6 nut (Continued) 2) Fix the fan motor lead, TC sensor and TCJ sensor with the clamp of the bell mouth. 3) Mount the electric parts box with the fixing screws A and B. (Ø4 ×...
  • Page 92 Part name Procedure Remarks 1. Detachment Drain pump Fixing screw A 1) Carry out works of item 1 of and item 1 of 6 . 2) Remove the drain pump connector Drain por Drain port ain port (CN504, White, 2P) connected to the control P .C.
  • Page 93 Part name Procedure Remarks 1. Detachment Float switch assembly 1) Carry out works of item 1 of and works from 1) to 5). Float s Float switch assemb Float switch assembly witch assembly 2) Remove the fixing screw and then remove the float switch assembly.
  • Page 94 Part name Procedure Remarks 1. Detachment Heat exchanger 1) Recover the refrigerant gas. 2) Carry out work of item 1 of 3) Remove refrigerant pipe at indoor unit side. 4) Remove the fixing screws and then remove the piping cover. (Ø4 × 10, 3 pcs.) 5) Remove the drain hose from the drain pump and remove the fixing screws to Fixing screws (Ø4 ×10)

  • Page 95: Exploded Views And Parts List

    11. EXPLODED VIEWS AND PARTS LIST RAV-GM901UTP-E, RAV-GM901UTP-TR - 95 -...
  • Page 96 RAV-GM Location Part No. Description 901UTP-E 901UTP-TR 43T20334 FAN,ASSY TURB 43T44611 REFRIGERANT CYCLE ASSEMBLY 43T22322 BELL MOUTH 43T72320 PAN ASSY, DRAIN 43T70326 HOSE, DRAIN 43T63348 CLAMP, DOWN 43T63349 CLAMP, UP 43T63347 CLAMP, WIRE 43T97321 NUT, FLARE, 3/8 IN 43T97323 NUT, FLARE, 5/8 IN 43T82337 SOCKET 43T82339...
  • Page 97 Electric parts RAV-GM Location Part No. Description 901UTP-E 901UTP-TR 43T50347 SENSOR ASSY, SERVICE 43T50476 SERVICE-SENSOR 43T60427 TERMINAL BLOCK 43T60434 TERMINAL BLOCK, 2P 43T6W326 PC BOARD ASSY - 97 -...
  • Page 98 RBC-U31PG (W, WS)-E, RBC-U31PGS (W, WS)-E 308, 309 306, 307, 323, 324 310, 311 Model Name RBC- Location Part No. Description U31PG (W)-E U31PG (WS)-E U31PGS (W)-E U31PGS (WS)-E 43409207 Grille, Air Inlet 43480017 Air Filter, ABS + PPNET 4302D003 Motor, Louver, MP24Z3N 43407145 Outlet, Air Form, PS-F...
  • Page 99 WARNINGS ON REFRIGERANT LEAKAGE Check of Concentration Limit The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its concentration will not exceed a set limit. The refrigerant R32 which is used in the air conditioner is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws to be imposed which protect the ozone layer.
  • Page 100 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

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