Daikin CTXS09GVJU Service Manual
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Daikin CTXS09GVJU Service Manual

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SiUS12 - 814
G-Series
[Applied Models]
Inverter Multi : Heat Pump

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Summary of Contents for Daikin CTXS09GVJU

  • Page 1 SiUS12 - 814 G-Series [Applied Models] Inverter Multi : Heat Pump...
  • Page 2 SiUS12-814 SUPER MULTI NX G-Series Heat Pump Indoor Unit CTXS09GVJU CTXS12GVJU FTXS15DVJU FTXS18DVJU FDXS09DVJU FDXS12DVJU Outdoor Unit 2MXS18GVJU 4MXS32GVJU Table of Contents...

  • Page 3: Table Of Contents

    SiUS12-814 1. Introduction ....................vi 1.1 Safety Considerations ..................vi 1.2 Using Icons....................xi Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 Heat Pump Model..................2 Part 2 Specifications ............... 7 1. Specifications ....................8 1.1 Indoor Units ....................8 1.2 Outdoor Units .....................
  • Page 4 SiUS12-814 3.13 Malfunctions ....................54 3.14 Forced Operation Mode ................55 3.15 Wiring-Error Check..................56 3.16 Additional Functions ................... 58 Part 5 Operation Manual ..............61 1. System Configuration................62 1.1 Operation Instructions ................62 2. Instruction....................63 2.1 Manual Contents and Reference Page ............63 2.2 Safety Precautions ..................
  • Page 5 SiUS12-814 5.16 Discharge Pipe Temperature Control............135 5.17 High Pressure Control in Cooling ............. 136 5.18 Compressor Sensor System Abnormality ..........138 5.19 Position Sensor Abnormality ..............140 5.20 CT or Related Abnormality ............... 141 5.21 Thermistor or Related Abnormality (Outdoor Unit)........143 5.22 Electrical Box Temperature Rise..............
  • Page 6 SiUS12-814 1.1 Indoor Units ....................232 1.2 Outdoor Units ................... 233 2. Wiring Diagrams..................234 2.1 Indoor Units ....................234 2.2 Outdoor Units ................... 236 Index ....................i Drawings & Flow Charts ..............v Table of Contents...

  • Page 7: Introduction

    Introduction SiUS12-814 1. Introduction Safety Considerations Read these SAFETY CONSIDERATIONS carefully before installing air conditioning equipment and be sure to install it correctly. After completing the installation, make sure that the unit operates properly during the start-up operation. Instruct the customer on how to operate and maintain the unit. Inform customers that they should store this Installation Manual along with the Operation Manual for future reference.
  • Page 8 SiUS12-814 Introduction Warning Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug. Plugging or unplugging the power cable plug to operate the equipment may cause an electrical shock or fire. Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2m).
  • Page 9 Introduction SiUS12-814 Caution Use the welder in a well-ventilated place. Using the welder in an enclosed room may cause oxygen deficiency. viii...
  • Page 10 SiUS12-814 Introduction 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.
  • Page 11 Introduction SiUS12-814 Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug has dust or loose connection, it may cause an electrical shock or fire. Be sure to install the product correctly by using the provided standard For unitary type installation frame.

  • Page 12: Using Icons

    SiUS12-814 Introduction Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause the water to enter the room and wet the furniture and floor.
  • Page 13 Introduction SiUS12-814...

  • Page 14: Part 1 List Of Functions

    SiUS12-814 Part 1 List of Functions 1. List of Functions ..................2 1.1 Heat Pump Model..................2 List of Functions...

  • Page 15: List Of Functions

    List of Functions SiUS12-814 1. List of Functions Heat Pump Model Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter — Operation Limit for Cooling (°FDB) — Basic Function Operation Limit for Heating (°FWB) — Photocatalytic Deodorizing Filter —...
  • Page 16 SiUS12-814 List of Functions Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter — Operation Limit for Cooling (°FDB) — Photocatalytic Deodorizing Filter — Basic Function Air Purifying Filter with Photocatalytic Operation Limit for Heating (°FWB) — Deodorizing Function PAM Control —...
  • Page 17 List of Functions SiUS12-814 Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter — Operation Limit for Cooling (°FDB) — Basic Function Operation Limit for Heating (°FWB) — Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic PAM Control —...
  • Page 18 SiUS12-814 List of Functions Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter — — Operation Limit for Cooling (°FDB) 114.8 114.8 Basic Function Photocatalytic Deodorizing Filter — — Operation Limit for Heating (°FWB) 59.9 59.9 Air Purifying Filter with Photocatalytic —...
  • Page 19 List of Functions SiUS12-814 List of Functions...

  • Page 20: Part 2 Specifications

    SiUS12-814 Part 2 Specifications 1. Specifications ....................8 1.1 Indoor Units ....................8 1.2 Outdoor Units ..................... 10 Specifications...

  • Page 21: Specifications

    Specifications SiUS12-814 1. Specifications Indoor Units Wall Mounted Indoor Units 60Hz 208-230V CTXS09GVJU CTXS12GVJU Model Cooling Heating Cooling Heating Rated Capacity 9kBtu/h Class 12kBtu/h Class Front Panel Color White White 388 (11.0) 400 (11.3) 388 (11.0) 400 (11.3) Air Flow Rates cfm (m³/min)
  • Page 22 SiUS12-814 Specifications Slim Concealed Ceiling-Mounted Indoor Units 60Hz 230V FDXS09DVJU FDXS12DVJU Model Cooling Heating Cooling Heating Rated Capacity 9kBtu/h Class 12kBtu/h Class External Static Pressure Air Flow Rates Type Sirocco Fan Sirocco Fan Motor Output Speed Steps 5 Steps, Quiet, Auto 5 Steps, Quiet, Auto Air Filter Removable / Washable / Mildew Proof...

  • Page 23: Outdoor Units

    Specifications SiUS12-814 Outdoor Units 60Hz 208-230V 2MXS18GVJU Model Cooling Heating Capacity — Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC45EXD Motor Output 1,380 Model FVC50K Refrigerant Oil Charge 26.5 Type R-410A Refrigerant Charge...
  • Page 24 SiUS12-814 Specifications 60Hz 208-230V 4MXS32GVJU Model Cooling Heating Capacity — Power Consumption — Running Current — Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC63EXD Motor Output 1,920 Model FVC50K Refrigerant Oil Charge 26.5 Type R-410A Refrigerant Charge 6.83 58.4...
  • Page 25 Specifications SiUS12-814 Specifications...

  • Page 26: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiUS12-814 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........14 1.1 Indoor Unit....................14 1.2 Outdoor Unit ....................18 Printed Circuit Board Connector Wiring Diagram...

  • Page 27: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram SiUS12-814 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit 1.1.1 CTXS09/12GVJU, FTXS15/18DVJU Connectors PCB(1) (Control PCB) (indoor unit) 1) S1 Connector for fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S8 Connector for swing motor (vertical blades) 4) S21 Connector for centralized control (HA)
  • Page 28 SiUS12-814 Printed Circuit Board Connector Wiring Diagram PCB(1): Control PCB (indoor unit) LED A (R2860) PCB(2): Signal Receiver PCB PCB(3): Buzzer PCB (R2861) RTH1 (R2862) PCB(4): Display PCB PCB(5): INTELLIGENT EYE sensor PCB LED1 LED2 LED3 (R2863) (R2864) Printed Circuit Board Connector Wiring Diagram...
  • Page 29 Printed Circuit Board Connector Wiring Diagram SiUS12-814 1.1.2 FDXS09/12DVJU Connectors PCB (1) (Control PCB) 1) S1 Connector for fan motor 2) S7 Connector for fan motor 3) S21 Connector for centralized control 4) S26 Connector for display PCB 5) S32 Connector for room temp/heat exchanger thermistor PCB (2) (Display PCB) 1) S1...
  • Page 30 SiUS12-814 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (2): Display PCB 2P084375 Printed Circuit Board Connector Wiring Diagram...

  • Page 31: Outdoor Unit

    Printed Circuit Board Connector Wiring Diagram SiUS12-814 Outdoor Unit 1.2.1 2MXS18GVJU Connectors Control PCB Service Monitor PCB 1) S10 Connector for S11 on MID1 2) S20 Connector for electronic expansion valve coil A port 3) S21 Connector for electronic expansion valve coil B port 4) S31 Connector for CN14 on SPM 5) S32...

  • Page 32: Service Monitor Pcb

    SiUS12-814 Printed Circuit Board Connector Wiring Diagram Control PCB Service Monitor PCB S102 LED A LED1 LED2 LED3 LED4 S101 (R4524) S92 S21 S90 S40 MID1 (R4019) Printed Circuit Board Connector Wiring Diagram...
  • Page 33 Printed Circuit Board Connector Wiring Diagram SiUS12-814 Inverter PCB (MID2) FU201 (3.15A) (R4020) CN14 CN11 (R4021) Printed Circuit Board Connector Wiring Diagram...
  • Page 34 SiUS12-814 Printed Circuit Board Connector Wiring Diagram 1.2.2 4MXS32GVJU Connectors PCB(1)(Main PCB) 1) S10 Connector for terminal strip (indoor-outdoor transmission) 2) S15 Connector for COOL / HEAT mode lock 3) S20 Connector for electronic expansion valve coil A port (white) 4) S21 Connector for electronic expansion valve coil B port (red) 5) S22...
  • Page 35 Printed Circuit Board Connector Wiring Diagram SiUS12-814 PCB Detail PCB(1): Main PCB FU2(3.15A) V100 (30A) S101 FU3(3.15A) (R6060) PCB(2): Service Monitor PCB Printed Circuit Board Connector Wiring Diagram...

  • Page 36: Part 4 Function And Control

    SiUS12-814 Part 4 Function and Control 1. Main Functions..................24 1.1 Frequency Principle..................24 1.2 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ....26 1.3 Fan Speed Control for Indoor Units............27 1.4 Program Dry Function ................28 1.5 Automatic Operation................... 29 1.6 Temperature Control ..................

  • Page 37: Main Functions

    Main Functions SiUS12-814 1. Main Functions Note: Check the list of functions applicable to different models. Frequency Principle Main Control The compressor is frequency-controlled during normal operation. The target frequency is set by the Parameters following 2 parameters coming from the operating indoor unit: The load condition of the operating indoor unit The difference between the room temperature and the set temperature Additional...
  • Page 38 SiUS12-814 Main Functions Inverter Features The inverter provides the following features: System capacity can be modulated according to changes of the outdoor temperature and the indoor cooling/heating load. Heating/Cooling Set Point is quickly reached By quickly increasing the compressor rotational speed at system startup, the heat/cool set pont is rapidly achieved.

  • Page 39: Power-Airflow Dual Flaps, Wide Angle Louvers And Auto-Swing

    Main Functions SiUS12-814 Power-Airflow Dual Louvers, Wide Angle Louvers and Auto-Swing Power-airflow The large louvers send a large volume of air downwards, providing optimum control for cooling, Dual Louvers heating, and dry mode. Heating Mode During heating mode, the large louver directs warm air downwards where it then can pervade the entire room.

  • Page 40: Fan Speed Control For Indoor Units

    SiUS12-814 Main Functions Fan Speed Control for Indoor Units Control Mode The airflow rate can be automatically controlled depending on the difference between the set temperature and the room temperature. This is done through phase control and Hall IC control. For more information about Hall IC, refer to the troubleshooting for fan motor on page 118.

  • Page 41: Program Dry Function

    Main Functions SiUS12-814 Program Dry Function Program dry function removes humidity without lowering the room temperature. Since the microcomputer controls both the temperature and airflow volume, the temperature adjustment and fan adjustment buttons are inoperable in this mode. In Case of The microcomputer automatically sets the temperature and fan settings.

  • Page 42: Automatic Operation

    SiUS12-814 Main Functions Automatic Operation Automatic Cooling / Heating Function (Heat Pump Only) When the AUTO mode is selected with the remote controller, the microcomputer automatically determines the operation mode from cooling and heating according to the room temperature and setting temperature at the time of the operation startup, and automatically operates in that mode.

  • Page 43: Temperature Control

    Main Functions SiUS12-814 Temperature Control Thermostat control is based on the difference between the room temperature and the setpoint. Thermostat OFF Condition The temperature difference is in zone A. Thermostat ON Condition The temperature difference is above zone C after being in zone A. The system resumes from defrost control in any zones except A.

  • Page 44: Night Set Mode

    SiUS12-814 Main Functions Night Set Mode When the OFF timer is set, the Night Set mode automatically activates. The Night Set mode maintains the airflow setting made by users. The Night Set The Night Set mode continues heating or cooling the room at the set temperature for the first one Mode hour, then automatically raises the temperature setting slightly in the case of cooling, or lowers it slightly in the case of heating, for economical operations.

  • Page 45: Intelligent Eye

    Main Functions SiUS12-814 INTELLIGENT EYE This is the function that detects existence of humans in the room by a human motion sensor (INTELLIGENT EYE) which serves to reduce capacity and save electricty when no people are present in the room. Processing 1.
  • Page 46 SiUS12-814 Main Functions Since the set temperature is shifted by Δ3.6°F higher for 40 minutes, compressor speed lowers, saving energy. When the space becomes unoccupied long enough for the intelligent eye to shift the unit into setback operation, the equipment is prevented from mechanically satisfying (thermo-OFF) for the first 40 minutes of that occupied mode.

  • Page 47: Home Leave Operation

    Main Functions SiUS12-814 HOME LEAVE Operation Outline Addressing the customer's need for immediate heating and cooling of the room after returning home, or for house maintenance, you may switch the temperature and air volume from normal time to outing time by one touch. This function also stabilizes irregular cooling or heating. . Details of the 1.

  • Page 48: Inverter Powerful Operation

    SiUS12-814 Main Functions 1.10 Inverter POWERFUL Operation Outline In order to utilize the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Details of the When the POWERFUL button is pushed in each operation mode, the fan speed / setting Control temperature will be converted to the following states in a period of twenty minutes.
  • Page 49 Main Functions SiUS12-814 In case of the Wall Mounted Indoor Units ON / OFF button (R2824) In case of the Slim Concealed Ceiling-Mounted Indoor Units ON / OFF button (R4133) Push this button once to start operation. Push once again to stop it. This button is useful when the remote controller is missing.
  • Page 50 SiUS12-814 Main Functions 1.11.7 Auto-restart Function Even if a power failure (including one for just a moment) occurs during the operation, the operation automatically restarts in the condition before the power failure when power is restored. (Note) It takes 3 minutes to restart the operation because the 3-minute standby function is activated.

  • Page 51: Function Of Thermistor

    Function of Thermistor SiUS12-814 2. Function of Thermistor Heat Pump Model <2MXS18GVJU> Expansion valve Receiver Solenoid valve Four-way valve Compressor (R8362) <4MXS32GVJU> Expansion valve Four way valve Compressor (R5067) Function and Control...
  • Page 52 SiUS12-814 Function of Thermistor A Outdoor Heat 1. An outdoor heat exchanger thermistor is used for controlling a target discharge temperature. Set a target discharge temperature depending on an outdoor and indoor heat exchanger Exchanger temperature. Thermistor Control the electronic expansion valve opening so that the target discharge temperature can be obtained.

  • Page 53: Control Specification

    Control Specification SiUS12-814 3. Control Specification Mode Hierarchy Outline There are two modes; the mode selected in user’s place (normal air conditioning mode) and forced operation mode for installation and providing service. Detail Air Conditioner’s Control Mode 1. For heat pump model There are following modes;...

  • Page 54: Frequency Control

    SiUS12-814 Control Specification Frequency Control Outline Frequency that corresponds to each room’s capacity will be determined according to the difference in the temperature of each room and the temperature that is set by the remote controller. The function is explained as follows. 1.
  • Page 55 Control Specification SiUS12-814 Indoor Frequency Command (ΔD signal) The difference between a room temperature and the temperature set by the remote controller will be taken as the “ΔD signal” and is used for frequency command. ΔD ΔD ΔD ΔD Temperature Temperature Temperature Temperature...

  • Page 56: Controls At Mode Changing / Start-Up

    SiUS12-814 Control Specification Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline Operate the inverter in the open phase operation with conditions including the preheating command from the indoor temperature, the outdoor air temperature, and the discharge pipe temperature. Detail Preheating ON Condition When outdoor air temperature is below 51°F and discharge pipe temperature is below 51°F,...

  • Page 57: Discharge Pipe Control

    Control Specification SiUS12-814 Discharge Pipe Control Outline The discharge pipe temperature is used as the compressor's internal temperature. If the discharge pipe temperature rises above a certain level, the operating frequency upper limit is set to keep this temperature from going up further. Detail Divide the Zone A°F...

  • Page 58: Freeze-Up Protection Control

    SiUS12-814 Control Specification Freeze-up Protection Control Outline During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger. The signal from the indoor unit must be divided into the zones as shown in the following diagram: Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 seconds from...

  • Page 59: Fan Control

    Control Specification SiUS12-814 Fan Control Outline Fan control is carried out with the following conditions present: 1. Fan ON control for electric component cooling fan 2. Fan control when defrosting 3. Fan OFF delay when stopped 4. ON/OFF control when cooling operation 5.

  • Page 60: Defrost Control

    SiUS12-814 Control Specification 3.10 Defrost Control Outline Heat Pump Only Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing. Detail Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature.
  • Page 61 Control Specification SiUS12-814 32 class 62Hz 39Hz (R8364) Function and Control...

  • Page 62: Low Hz High Pressure Limit

    SiUS12-814 Control Specification 3.11 Low Hz High Pressure Limit Outline Heat Pump Only Set the upper limit of high pressure in a low Hz zone. Set the upper limit of the indoor heat exchanger temperature by its operating frequency in Hz. Separate into the following three zones: 1.

  • Page 63: Electronic Expansion Valve Control

    Control Specification SiUS12-814 3.12 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Room Distribution Control 1.
  • Page 64 SiUS12-814 Control Specification Detail The followings are the examples of control which function in each mode by the electronic expansion valve control. Operation pattern : function × : not function When power is turned ON × × × × × ×...
  • Page 65 Control Specification SiUS12-814 3.12.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 3.12.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
  • Page 66 SiUS12-814 Control Specification temperature) Set the target discharge pipe temperature to control SH. The inclination cannot be changed due to operating condition. Determine a correction value of the electronic expansion valve compensation and drive it according to the deflection of the target discharge temperature and actual discharge temperature, and the discharge temperature variation by 20 seconds.

  • Page 67: Malfunctions

    Control Specification SiUS12-814 3.13 Malfunctions 3.13.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Gas pipe thermistor 5.

  • Page 68: Forced Operation Mode

    SiUS12-814 Control Specification 3.13.4 Preventing Indoor Freezing During cooling, if the heat exchanger temperature in the room with stopped operation drops below the specified temperature for the specified time, open the electronic expansion valve in the operation stopped room as specified, and carry out the fully closed operation. After this, if freezing abnormality occurs more than the specified time, the system is forced off due to the abnormality.

  • Page 69: Wiring-Error Check

    Control Specification SiUS12-814 3.15 Wiring-Error Check Outline The convenient Wiring Error Check function is designed for the microcomputer to automatically correct wiring errors. If local wiring cannot be determined due to buried piping just press the wiring-error check switch that is behind the right-hand panel of the outdoor unit. Even if the connections for Room A and Room B are confused, the system may run.
  • Page 70 SiUS12-814 Control Specification Checking the Those data can be checked by looking at the service monitor LED indicators, when the wiring error checking is over, during forced operation, at the stop of the system. current setting The LED indicators stop flashing when the forced operation is over. data on the LED1…Room A wiring, LED2…Room B wiring microcomputer...

  • Page 71: Additional Functions

    Control Specification SiUS12-814 3.16 Additional Functions 3.16.1 Priority Room Setting Electronic expansion valves are controlled to provide the unit designated as the priority room with proper distribution considering the capacity of other room units. (Distribution of capacity: Priority room unit --- ΔD Max., other room units --- ΔD -α) Setting method Turn off the circuit breaker before changing the setting.
  • Page 72 SiUS12-814 Control Specification Function and Control...
  • Page 73 Control Specification SiUS12-814 Function and Control...

  • Page 74: Part 5 Operation Manual

    SiUS12-814 Part 5 Operation Manual 1. System Configuration................62 1.1 Operation Instructions ................62 2. Instruction....................63 2.1 Manual Contents and Reference Page ............63 2.2 Safety Precautions ..................64 2.3 Names of Parts................... 66 2.4 Preparation Before Operation ..............75 2.5 AUTO · DRY · COOL · HEAT · FAN Operation .......... 78 2.6 Adjusting the Airflow Direction..............

  • Page 75: System Configuration

    System Configuration SiUS12-814 1. System Configuration Operation Instructions After the installation and test operation of the room air conditioner are completed, it should be operated and handled as described in the following pages. Users need to know how to operate the equipment correctly, and how to maximize efficient use of cooling and heating.

  • Page 76: Instruction

    SiUS12-814 Instruction 2. Instruction Manual Contents and Reference Page Slim Concealed Ceiling-Mounted Wall Mounted Indoor Units Indoor Units Model Series CTXS09/12G FTXS15/18D FDXS09/12D Read Before Operation Safety Precautions Names of Parts Preparation Before Operation Operation AUTO, DRY, COOL, HEAT, FAN Operation 1 Adjusting the Airflow Direction —...

  • Page 77: Safety Precautions

    • Do not attempt to repair, relocate, modify or reinstall the air conditioner by yourself. Incorrect work or modifications could cause electric shocks, fire or other damage. For repairs and reinstallation, consult your Daikin dealer for advice and information. • The refrigerant used in the air conditioner is safe. Although leaks should not occur, if for some reason any refrigerant happens to leak into the room, make sure it does not come in contact with any flame such as gas heaters, kerosene heaters or gas range.
  • Page 78 • Arrange the drain hose to ensure smooth drainage. Improper drainage may cause water damage to the building, or it’s furnishing. • Depending on the usage environment, water may leak from the air conditioner. If this happens, contact your Daikin Dealer.

  • Page 79: Names Of Parts

    Instruction SiUS12-814 Names of Parts CTXS09/12GVJU Names of parts Indoor Unit Main unit control panel Operation Manual...

  • Page 80: Outdoor Unit

    SiUS12-814 Instruction Outdoor Unit ? Indoor Unit 1. Air filter 14. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Air-purifying filter with photocatalytic Push once again to stop it. deodorizing function: • The operation mode refers to the following table. •...

  • Page 81: Remote Controller

    Instruction SiUS12-814 Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE QUIET SENSOR SWING CANCEL TIMER < ARC433A53 > 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET operation • It sends signals to the indoor unit. 9. FAN setting button: 2.
  • Page 82 SiUS12-814 Instruction FTXS15/18DVJU Operation Manual...
  • Page 83 Instruction SiUS12-814 Operation Manual...
  • Page 84 SiUS12-814 Instruction < ARC433A53 > Operation Manual...
  • Page 85 Instruction SiUS12-814 FDXS09/12DVJU Names of parts Indoor Unit Operation Manual...
  • Page 86 SiUS12-814 Instruction Outdoor Unit Indoor Unit 1. Air outlet 8. TIMER lamp (yellow) 2. Air outlet grille: (Field supply) 9. HOME LEAVE lamp (red): • Appearance of the Air outlet grille and Air inlet • Lights up when you use HOME LEAVE grille may differ with some models.
  • Page 87 Instruction SiUS12-814 Remote Controller [ ARC433A63] 1. Signal transmitter: 7. MODE selector button: • It selects the operation mode. • It sends signals to the indoor unit. (AUTO/DRY/COOL/HEAT/FAN) 2. Display: 8. QUIET button: OUTDOOR UNIT QUIET • It displays the current settings. operation (In this illustration, each section is shown with all its displays ON for the purpose of...

  • Page 88: Preparation Before Operation

    SiUS12-814 Instruction Preparation Before Operation To set the batteries Position + and 1. Slide the front cover to take it off. – correctly! 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION About batteries • When replacing the batteries, use batteries of the same type, and replace the two old batteries together.

  • Page 89: Preparation Before Operation

    Instruction SiUS12-814 Preparation Before Operation To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. •...

  • Page 90: Tips For Saving Energy

    SiUS12-814 Instruction To set the clock 1. Press “CLOCK button ”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. Holding down “ ” or “ ” button rapidly increases or decreases the time HOME LEAVE ON/OFF display.

  • Page 91: Auto · Dry · Cool · Heat · Fan Operation

    Instruction SiUS12-814 AUTO · DRY · COOL · HEAT · FAN Operation Operation Manual...

  • Page 92: To Change The Airflow Rate Setting

    SiUS12-814 Instruction To change the airflow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of airflow rate setting from “ ” to “ ” plus “ ” “ ” are available. The airflow rate setting is not variable.

  • Page 93: Adjusting The Airflow Direction

    Instruction SiUS12-814 Adjusting the Airflow Direction Operation Manual...
  • Page 94 SiUS12-814 Instruction fins Operation Manual...

  • Page 95: Powerful Operation

    Instruction SiUS12-814 POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity. To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used before POWERFUL operation.

  • Page 96: Outdoor Unit Quiet Operation

    SiUS12-814 Instruction OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the fan speed on the outdoor unit. This function is convenient during night. To start OUTDOOR UNIT QUIET operation 1.

  • Page 97: Home Leave Operation

    Instruction SiUS12-814 HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and airflow rate settings. To start HOME LEAVE operation 1. Press “HOME LEAVE button” . • “ ” is displayed on the LCD. •...
  • Page 98 SiUS12-814 Instruction What’s the HOME LEAVE operation? Is there a set temperature and airflow rate which is most comfortable, a set temperature and airflow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and airflow rate.

  • Page 99: Intelligent Eye Operation

    Instruction SiUS12-814 2.10 INTELLIGENT EYE Operation INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. To cancel the INTELLIGENT EYE operation HOME LEAVE ON/OFF...
  • Page 100 SiUS12-814 Instruction “INTELLIGENT EYE” is useful for Energy Saving Energy saving operation • Change the temperature –3.6°F in heating / +3.6°F in cooling / +1.8°F in dry mode from set temperature. • Decrease the airflow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...

  • Page 101: Timer Operation

    Instruction SiUS12-814 2.11 TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...

  • Page 102: To Use On Timer Operation

    SiUS12-814 Instruction To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like. •...

  • Page 103: Note For Multi System

    Instruction SiUS12-814 2.12 Note for Multi System Note for Multi System 〈〈 〉〉 What is a “Multi System”? This system has one outdoor unit connected to multiple indoor units. Selecting the Operation Mode 1. With the Priority Room Setting present but inactive or not present.

  • Page 104: Priority Room Setting

    SiUS12-814 Instruction Priority Room Setting The Priority Room Setting requires initial programming during installation. Please consult your authorized dealer for assistance. The room designated as the Priority Room takes priority in the following situations; 1. Operation Mode Priority. As the operation mode of the Priority Room takes precedence, the user can select a different operation mode from other rooms.

  • Page 105: Care And Cleaning

    Instruction SiUS12-814 2.13 Care and Cleaning CTXS09/12GVJU Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units To avoid possible bodily injury, units should be shutoff or disconnected before any cleaning or servicing is attempted. Indoor unit, Outdoor unit and Remote controller 1.

  • Page 106: Air Filter

    SiUS12-814 Instruction Filters 1. Open the front panel. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the air-purifying filter with photocatalytic deodorizing function.

  • Page 107: Before A Long Idle Period

    Instruction SiUS12-814 Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check the units to ensure they are level and secure. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the water drains smoothly out of the drain hose during COOL or DRY operation.

  • Page 108: Front Panel

    SiUS12-814 Instruction FTXS15/18DVJU Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units To avoid possible bodily injury, units should be shutoff or disconnected before any cleaning or servicing is attempted. Indoor unit, Outdoor unit and Remote controller 1.
  • Page 109 Instruction SiUS12-814 Filters 1. Open the front panel. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the air-purifying filter with photocatalytic deodorizing function.
  • Page 110 SiUS12-814 Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check the units to ensure they are level and secure. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the water drains smoothly out of the drain hose during COOL or DRY operation.

  • Page 111: Cleaning The Air Filter

    Instruction SiUS12-814 FDXS09/12DVJU Care and Cleaning CAUTION • Only a qualified service person is allowed to perform maintenance. • Before cleaning, be sure to stop the operation and turn the breaker OFF. Cleaning the air filter 1. Removing the air filter. •...
  • Page 112 • The suction grille is optional. • Do not use water or air of 122°F or higher for cleaning air filters and outside panels. • Ask your DAIKIN dealer how to clean it. Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded.

  • Page 113: Troubleshooting

    Instruction SiUS12-814 2.14 Troubleshooting that you have the indoor unit Operation Manual...
  • Page 114 SiUS12-814 Instruction Check again. Please check again before calling a repair person. Case Check The air conditioner does not • Has a breaker been turned OFF or a fuse blown? operate. • Is there a power failure? (OPERATION lamp is off.) •...
  • Page 115 Instruction SiUS12-814 Operation Manual...

  • Page 116: Part 6 Service Diagnosis

    SiUS12-814 Part 6 Service Diagnosis 1. Caution for Diagnosis................104 1.1 Troubleshooting with the Operation Lamp ..........104 2. Problem Symptoms and Measures ............106 3. Service Check Function ................107 4. Code Indication on the Remote Controller ..........110 4.1 Error Codes and Description of Fault ............110 5.

  • Page 117: Caution For Diagnosis

    Caution for Diagnosis SiUS12-814 1. Caution for Diagnosis Troubleshooting with the Operation Lamp The operation lamp flashes when any of the following errors is detected: 1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation.
  • Page 118 SiUS12-814 Caution for Diagnosis Troubleshooting In case of 4MXS32GVJU with the LED Service PC-board Indication LED A For 4 Rooms (R6333) There are green and red LEDs on the PCB. The flashing green LED indicates normal equipment condition, and the OFF condition of the red LED indicates normal equipment condition. (Troubleshooting with the green LED) The LED A (green) of the outdoor unit indicates microcomputer operation condition.

  • Page 119: Problem Symptoms And Measures

    Problem Symptoms and Measures SiUS12-814 2. Problem Symptoms and Measures Problem Symptom Check Item Details of Measure Page to be referred None of the units operates. Check the power supply. Check to make sure that the rated voltage is — supplied.

  • Page 120: Service Check Function

    SiUS12-814 Service Check Function 3. Service Check Function In the ARC433 series remote controller, the temperature display sections on the main unit indicate corresponding codes. Check Method 1 1. When the timer cancel button is held down for 5 seconds, a [00] indication flashes on the temperature display section.
  • Page 121 Service Check Function SiUS12-814 Check Method 2 1. Enter the diagnosis mode. Press the 3 buttons (TEMP ,TEMP , MODE) simultaneously. (R4272) The digit of the number of tens blinks. Try again from the start when the digit does not blink. (R4273) 2.
  • Page 122 SiUS12-814 Service Check Function The digit of the number of units blinks. (R4276) 5. Press the TEMP button. Press TEMP or TEMP and change the digit until you hear the sound of “beep”. (R4277) 6. Diagnose by the sound. beep : The first digit (based on a tens/units format) does not match the system error code. beep-beep: The first digit matches the system error code.

  • Page 123: Code Indication On The Remote Controller

    Code Indication on the Remote Controller SiUS12-814 4. Code Indication on the Remote Controller Error Codes and Description of Fault Code Indication Description of Problem System Normal Insufficient gas Low-voltage detection or over-voltage detection Signal transmission error (between indoor and outdoor units) Signal transmission error (on outdoor unit PCB) Unspecified voltage (between indoor and outdoor units) Anti-icing function in other rooms...

  • Page 124: Troubleshooting

    SiUS12-814 Troubleshooting 5. Troubleshooting Indoor Units - : Not used for troubleshooting ∗ : Varies depending on the cases. Indication on the Description of the Fault Details of fault remote controller (Refer to the indicated page.) Indoor unit in normal condition (Conduct a diagnosis of the —...

  • Page 125: Outdoor Units

    Troubleshooting SiUS12-814 Outdoor Units : ON, : OFF, : Blinks Green : Flashes when in normal condition Red : OFF in normal condition - : Not used for troubleshooting ∗ : Varies depending on the cases. Outdoor Unit LED Indication Indication on Description of The Fault the remote...
  • Page 126 SiUS12-814 Troubleshooting Note: 1. The indications in the parenthesis ( ) in the remote controller display column are displayed only when system-down occurs. 2. When a sensor error occurs, check the remote controller display to determine which sensor is malfunctioning. If the remote controller does not indicate the error type, conduct the following operation.

  • Page 127: Indoor Unit Pcb Abnormality

    Troubleshooting SiUS12-814 Indoor Unit PCB Abnormality Remote Controller Display Method of Evaluation of zero-cross detection of power supply by indoor unit. Malfunction Detection Malfunction When there is no zero-cross detection in approximately 10 continuous seconds. Decision Conditions Supposed Faulty indoor unit PCB Causes Faulty connector connection Troubleshooting...

  • Page 128: Freeze-Up Protection Control Or High Pressure Control

    SiUS12-814 Troubleshooting Freeze-up Protection Control or High Pressure Control Remote Controller Display Method of High pressure control (heat pump model only) Malfunction During heating operations, the temperature detected by the indoor heat exchanger thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection The freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
  • Page 129 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Check the air passage. Refer to P.161 Is there any short-circuit? Provide sufficient air passage. Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 130: Fan Motor Or Related Abnormality

    SiUS12-814 Troubleshooting Fan Motor or Related Abnormality 5.5.1 AC Motor Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction When the detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
  • Page 131 Troubleshooting SiUS12-814 5.5.2 DC Motor Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction When the detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
  • Page 132 SiUS12-814 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.01 Turn off power supply Refer to P.158 and rotate fan by hand. Does fan rotate Replace fan motor. smoothly? Turn power ON and operate fan.
  • Page 133 Troubleshooting SiUS12-814 Turn off power supply and disconnect fan motor connector, then turn power ON again. Check No.01 Check output of fan motor connector rotation number command Replace fan motor. voltage DC 1~6V generated? Note : Motor may break when the motor connector is disconnected...

  • Page 134: Thermistor Or Related Abnormality (Indoor Unit)

    SiUS12-814 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) C4, C9 Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor operation∗. ∗...

  • Page 135: Signal Transmission Error (Between Indoor And Outdoor Units)

    Troubleshooting SiUS12-814 Signal Transmission Error (between Indoor and Outdoor Units) Remote Controller Display Method of The signal transmission data from the outdoor unit to the indoor unit is checked for normal Malfunction operation. Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of the data is abnormal.
  • Page 136 SiUS12-814 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.10 Check the indoor unit-outdoor unit Refer to P.164 connection wires. Is there any wiring error? Correct the indoor unit-outdoor unit connection wires.

  • Page 137: Unspecified Voltage (Between Indoor And Outdoor Units)

    Troubleshooting SiUS12-814 Unspecified Voltage (between Indoor and Outdoor Units) Remote Controller Display Method of The supply power is detected for its requirements (different from pair type and multi type) by the Malfunction indoor / outdoor transmission signal. Detection Malfunction The pair type and multi type are interconnected. Decision Conditions Supposed...

  • Page 138: Freeze-Up Protection Control

    SiUS12-814 Troubleshooting Freeze-up Protection Control Remote Controller Display Outdoor Unit LED Display Method of Indoor unit icing, during cooling operation, is detected by checking the temperatures sensed by the Malfunction indoor unit heat exchanger thermistor and room temperature thermistor that are located in a shut- down room.
  • Page 139 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.159 Check the wiring and piping. Check No.06 Wiring or piping out Activate the wiring error check of spec? Refer to P.161 mode.

  • Page 140: Outdoor Unit Pcb Abnormality

    SiUS12-814 Troubleshooting 5.10 Outdoor Unit PCB Abnormality Remote Controller Display Outdoor Unit LED Display Method of Only for 4MXS32GVJU Detect within the program of the microcomputer that the program is in normal running order. Malfunction Detection Malfunction When the program of the microcomputer is in abnormal running order. Decision Conditions Supposed...

  • Page 141: Ol Activation (Compressor Overload)

    Troubleshooting SiUS12-814 5.11 OL Activation (Compressor Overload) Remote Controller Display Outdoor Unit LED Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will shut down. Decision The error counter will reset itself if this or any other error does not occur during the following 60- minute compressor running time (total time).

  • Page 142: Compressor Lock

    SiUS12-814 Troubleshooting 5.12 Compressor Lock Remote Controller Display Outdoor Unit LED Display Method of A compressor lock is detected by checking the compressor running condition through the position Malfunction detection circuit. Detection Malfunction Judging from current waveform generated when high-frequency voltage is applied to the Decision compressor.

  • Page 143: Dc Fan Lock

    Troubleshooting SiUS12-814 5.13 DC Fan Lock Remote Controller Display Outdoor Unit LED Display Method of A fan motor line error is detected by checking the high-voltage fan motor rpm being detected by the Malfunction Hall IC. Detection Malfunction The fan does not start in 30 seconds even when the fan motor is running. Decision The system will shut down if the error occurs 16 times.

  • Page 144: Input Over Current Detection

    SiUS12-814 Troubleshooting 5.14 Input Over Current Detection Remote Controller Display Outdoor Unit LED Display Method of Malfunction is detected by checking the input current value. Malfunction Detection Malfunction The input current is at a certain value (depending on the condition) for 2.5 seconds. Decision The compressor halts if the error occurs, and restarts automatically after 3 minutes standby.
  • Page 145 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 ∗ An input over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.162 reconnected for part replacement, for example, and the system is interrupted by an input over-current, take the following procedure.

  • Page 146: Four-Way Valve Abnormality

    SiUS12-814 Troubleshooting 5.15 Four-Way Valve Abnormality Remote Controller Display Outdoor Unit LED Display Method of Only for 2MXS18GVJU Malfunction The liquid pipe thermistor, the outdoor temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if they function within their normal ranges in the operating mode. Detection Malfunction Either of the following conditions occurs 3 minutes after the compressor has started.
  • Page 147 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.05 Refer to P.160 Four way valve coil Correct. disconnected (loose)? Check No.06 Refer to P.161 Harness out of connector? Reconnect.

  • Page 148: Discharge Pipe Temperature Control

    SiUS12-814 Troubleshooting 5.16 Discharge Pipe Temperature Control Remote Controller Display Outdoor Unit LED Display Method of The discharge pipe temperature control (stop, frequency dropping, etc.) is checked with the Malfunction temperature being detected by the discharge pipe thermistor. Detection Malfunction 2YC45, 2YC63 Decision If the temperature being detected by the discharge pipe thermistor rises above 120°C, the...

  • Page 149: High Pressure Control In Cooling

    Troubleshooting SiUS12-814 5.17 High Pressure Control in Cooling Remote Controller Display Outdoor Unit LED Display Method of High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the Malfunction temperature being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction Activated when the temperature being sensed by the heat exchanger thermistor rises above...
  • Page 150 SiUS12-814 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Check the installation space. Refer to P.159 Check No.06 Check No. 07 Abnormal Change the air outlet grille Check the installation Refer to P.161 condition.

  • Page 151: Compressor Sensor System Abnormality

    Troubleshooting SiUS12-814 5.18 Compressor Sensor System Abnormality Remote Controller Display Outdoor Unit LED Display Method of Only for 4MXS32GVJU Fault condition is identified by the supply voltage and the DC voltage which is detected before Malfunction the compressor startup. Detection Fault condition is identified by compressor current which is detected right after the compressor startup.
  • Page 152 SiUS12-814 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn off the power Reactor connection check Connection OK? Connect properly. Compressor connection check Connect properly. Connection OK? Disconnect the reactor from the outdoor unit PCB and measure the resistance Reactor check...

  • Page 153: Position Sensor Abnormality

    Troubleshooting SiUS12-814 5.19 Position Sensor Abnormality Remote Controller Display Outdoor Unit LED Display Method of A compressor startup failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The system will shut down if the error occurs 8 times. Decision Conditions Supposed...

  • Page 154: Ct Or Related Abnormality

    SiUS12-814 Troubleshooting 5.20 CT or Related Abnormality Remote Controller Display Outdoor Unit LED Display Method of A CT or related error is detected by checking the compressor running frequency and CT-detected Malfunction input current. Detection Malfunction The compressor running frequency is below 55 Hz (18 class) or 32 Hz (32 class). Decision The input current is also below 1.25 A (18 class) or 0.5A (32 class).If this error repeats 4 times, the system will shut down.
  • Page 155 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.12 Turn off the power and turn it on Refer to P.165 again. Get the system started. ∗...

  • Page 156: Thermistor Or Related Abnormality (Outdoor Unit)

    SiUS12-814 Troubleshooting 5.21 Thermistor or Related Abnormality (Outdoor Unit) P4, J3, J6, J8, J9, H9 Remote Controller Display Outdoor Unit LED Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. Malfunction A thermistor error is detected by checking the temperature being detected by each thermistor.
  • Page 157 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Refer to P.161 Turn on the power again. Error displayed Reconnect. again on remote controller? Connector or thermistor Reconnect.

  • Page 158: Electrical Box Temperature Rise

    SiUS12-814 Troubleshooting 5.22 Electrical Box Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor off. Detection Malfunction With the compressor off, the radiation fin temperature is above 176°F (18 class) or 212°F (32 class). Decision Reset is made when the temperature drops below 158°F.
  • Page 159 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 WARNING Turn off the power and turn it on Refer to P.161 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 167˚F (18 class) or 180˚F (32 class) and stops...

  • Page 160: Radiation Fin Temperature Rise

    SiUS12-814 Troubleshooting 5.23 Radiation Fin Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of A radiation fin temperature rise is detected by checking the radiation fin temperature being detected Malfunction by the fin thermistor with the compressor on. Detection Malfunction The radiation fin temperature with the compressor on is above 194°F (18 class) or 221°F (32...
  • Page 161 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before WARNING Caution connect or disconnect connector, or To cool down the electricals, the Check No.06 parts damage may be occurred. outdoor unit fan gets started when Refer to P.161 (Precaution before turning on the power again) the radiation fin temperature rises above 167˚F (18 class) or 185˚F (32...

  • Page 162: Output Over Current Detection

    SiUS12-814 Troubleshooting 5.24 Output Over Current Detection Remote Controller Display Outdoor Unit LED Display Method of An output over-current is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. Decision A speed error occurs while the compressor is running.
  • Page 163 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. ∗ An input over-current may result from wrong internal wiring. If the wires have been disconnected and reconnected for part replacement, for example, and the system is interrupted by an input over-current, Check No.07 take the following procedure.

  • Page 164: Insufficient Gas

    SiUS12-814 Troubleshooting 5.25 Insufficient Gas 5.25.1 18 Class Remote Controller Display Outdoor Unit LED Display Method of Gas shortage detection I : Malfunction A gas shortage is detected by checking the CT-detected input current value and the compressor running frequency. Detection Gas shortage detection II : A gas shortage is detected by checking the difference between indoor unit heat exchanger...
  • Page 165 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.159 Any thermistor Replace in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor Check No.06 * Outdoor air thermistor...
  • Page 166 SiUS12-814 Troubleshooting 5.25.2 32 Class Remote Controller Display Outdoor Unit LED Display Method of Gas shortage detection I : Malfunction Gas shortage is detected by checking the input current value and the compressor running frequency. If the gas is short, the input current is smaller than the normal value. Detection Gas shortage detection II : Gas shortage is detected by checking the discharge temperature and the opening of the electronic...
  • Page 167 Troubleshooting SiUS12-814 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.159 Any thermistor Replace in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor Check No.06 * Outdoor air thermistor...

  • Page 168: Low-Voltage Detection Or Over-Voltage Detection

    SiUS12-814 Troubleshooting 5.26 Low-voltage Detection or Over-voltage Detection Remote Controller Display Outdoor Unit LED Display Method of An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage Malfunction detection circuit. Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer, or the Decision voltage being detected by the DC voltage detection circuit is judged to be below 150 V for 0.1 second.

  • Page 169: Signal Transmission Error (On Outdoor Unit Pcb)

    Troubleshooting SiUS12-814 5.27 Signal Transmission Error (on Outdoor Unit PCB) Remote Controller Display Outdoor Unit LED Display Method of Only for 4MXS32GVJU Communication error between microcomputer mounted on the main PCB and PM1. Malfunction Detection Malfunction When the data sent from the PM1 can not be received successively for 9 sec. Decision The abnormality is determined if the above fault conditions occurs once Fault counter is reset when the data from the PM1 can be successfully received.

  • Page 170: Anti-Icing Function In Other Rooms / Unspecified Voltage (Between Indoor And Outdoor Units)

    SiUS12-814 Troubleshooting 5.28 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units) UA, UH Remote Controller Display Outdoor Unit LED Display Method of A wrong connection is detected by checking the combination of indoor and outdoor units on the Malfunction microcomputer.

  • Page 171: Check

    Check SiUS12-814 6. Check How to Check 6.1.1 Fan Motor Connector Output Check Check No.01 1. Check connector connection. 2. Check motor power supply voltage output (pins 4-7 and 4-8). 3. Check motor control voltage (pins 4-3). 4. Check rotation command voltage output (pins 4-2). 5.

  • Page 172: Electronic Expansion Valve Check

    SiUS12-814 Check 6.1.2 Electronic Expansion Valve Check Check No.04 Conduct the following steps to check the electronic expansion valve (EV): 1. Check to see if the EV connector is correctly inserted in the PCB. Compare the EV unit and the connector number.
  • Page 173 Check SiUS12-814 6.1.3 Four-Way Valve Performance Check Check No.05 Turn off the power and turn it on again. * Four-way valve coil Start the heating-mode run. Cooling / Dry : No continuity Heating : Continuity S80 voltage at AC 220-240 V with Replace the outdoor unit compressor on? (Fig.

  • Page 174: Thermistor Resistance Check

    SiUS12-814 Check 6.1.4 Thermistor Resistance Check Check No.06 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.

  • Page 175: Installation Condition Check

    Check SiUS12-814 6.1.5 Installation Condition Check Check No.07 Installation condition check Check the Abnormal allowable dimensions Change the position of the air of the air suction and discharge grille or the discharge area. installation location. Normal Does the discharged air from other outdoor unit cause an Change the position of the air increase of the suction...

  • Page 176: Discharge Pressure Check

    SiUS12-814 Check 6.1.6 Discharge Pressure Check Check No.08 Discharge pressure check High Replace compressor. Is the stop valve open? Open the stop valve. Is the connection pipe Replace the pipe installed at deformed? the site. Dirty Are the heat exchanger Clean.

  • Page 177: Power Supply Waveforms Check

    Check SiUS12-814 6.1.8 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between pins 1 and 2 on the terminal board, and check the waveform disturbance. Check to see if the power supply waveform is a sine wave (Fig.1). Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2) [Fig.1] [Fig.2]...

  • Page 178: Capacitor Voltage Check

    SiUS12-814 Check 6.1.10 Capacitor Voltage Check Check No.12 Before checking the capacitor voltage, be sure to check the main circuit for short-circuit. Checking the capacitor voltage With the circuit breaker still on, measure the voltage according to the drawing of the model in question.

  • Page 179: Main Circuit Electrolytic Capacitor Check

    Check SiUS12-814 6.1.12 Main Circuit Electrolytic Capacitor Check Check No.14 Checking the main circuit electrolytic capacitor Never touch any live parts for at least 10 minutes after turning off the circuit breaker. If unavoidably necessary to touch a live part, make sure there is no DC voltage using the tester. Check the continuity with the tester.

  • Page 180: Hall Ic Check

    SiUS12-814 Check 6.1.14 Hall IC Check Check No.16 1. Check the connector connection. 2. With the power ON, operation OFF, and the connector connected, check the following. ∗Output voltage of about 5 V between pins 1 and 3. ∗Generation of 3 pulses between pins 2 and 3 when the fan motor is operating. Failure of (1) faulty PCB Replace the PCB.
  • Page 181 Check SiUS12-814 Service Diagnosis...

  • Page 182: Part 7 Removal Procedure

    SiUS12-814 Part 7 Removal Procedure 1. Outdoor Unit – 2MXS18GVJU ..............170 1.1 Removal of Outer Panels ................. 170 1.2 Removal of Electrical BOX ............... 171 1.3 Removal of PCB..................176 1.4 Removal of Fan Motor................180 1.5 Removal of Sound Insulation ..............181 1.6 Removal of Four-Way Valve Coil, Solenoid Valve Coil, Electronic Expansion Valve Coil and Thermistor ........

  • Page 183: Outdoor Unit - 2Mxs18Gvju

    Outdoor Unit – 2MXS18GVJU SiUS12-814 1. Outdoor Unit – 2MXS18GVJU Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points External appearance. Remove 4 screws of the top panel and 6 screws of the front panel.

  • Page 184: Removal Of Electrical Box

    SiUS12-814 Outdoor Unit – 2MXS18GVJU Removal of Electrical BOX Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the tie wires 2MXS18GVJU has only 2 ports.
  • Page 185 Outdoor Unit – 2MXS18GVJU SiUS12-814 Step Procedure Points Pull out the terminal Glass tube fuse and varistor board to open. cannot be replaced individually because lead- free soldering is provided. 2. Remove each wire harness Disconnect 2 Connector Electronic Harness expansion length connectors of the...
  • Page 186 SiUS12-814 Outdoor Unit – 2MXS18GVJU Step Procedure Points Disconnect the compressor relay connector. Remove the reactor lead wire. 3. Removing the wiring fixture Remove 6 screws of the wiring fixture. Removal Procedure...
  • Page 187 Outdoor Unit – 2MXS18GVJU SiUS12-814 Step Procedure Points 4. Removing the electrical box. Remove 1 screw of the electrical box. Remove 1 screw of the electrical box. Remove the drip-proof cover. Disconnect the fan motor lead wire. Removal Procedure...
  • Page 188 SiUS12-814 Outdoor Unit – 2MXS18GVJU Step Procedure Points Lift up the electrical box and dismount it. Removal Procedure...

  • Page 189: Removal Of Pcb

    Outdoor Unit – 2MXS18GVJU SiUS12-814 Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the controller PCB: Remove 1 screw of the PCB, and release two tabs.
  • Page 190 SiUS12-814 Outdoor Unit – 2MXS18GVJU Step Procedure Points Disconnect the service Release the tab to remove monitor PCB connector. the service monitor PCB. Lift up the control PCB. Removal Procedure...
  • Page 191 Outdoor Unit – 2MXS18GVJU SiUS12-814 Step Procedure Points Disconnect each wire harness connector linked to the control PCB. S31 (Pin 9): To CN14 S32 (Pin 5): To CN11 S33 (Pin 10): To S34 S71 (Pin 8): To S72 The figure shows the Glass tube fuse 3A control PCB.
  • Page 192 SiUS12-814 Outdoor Unit – 2MXS18GVJU Step Procedure Points 2. Removing the service monitor PCB The figure shows the service monitor PCB. 3. Removing the inverter PCB. Remove the 7 screws of the inverter PCB. Removal Procedure...

  • Page 193: Removal Of Fan Motor

    Outdoor Unit – 2MXS18GVJU SiUS12-814 Removal of Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the fan motor For reassembling, align lead wire connector. mark of propeller fan with D-cut section of motor shaft.

  • Page 194: Removal Of Sound Insulation

    SiUS12-814 Outdoor Unit – 2MXS18GVJU Removal of Sound Insulation Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove 5 screws of the right side panel. Remove 2 screws of the partition board, and remove the board.
  • Page 195 Outdoor Unit – 2MXS18GVJU SiUS12-814 Step Procedure Points Remove the noise insulation (top, outer and inner). Removal Procedure...

  • Page 196: Removal Of Four-Way Valve Coil, Solenoid Valve Coil, Electronic Expansion Valve Coil And Thermistor

    SiUS12-814 Outdoor Unit – 2MXS18GVJU Removal of Four-Way Valve Coil, Solenoid Valve Coil, Electronic Expansion Valve Coil and Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove 1 screw of the four-way valve coil.
  • Page 197 Outdoor Unit – 2MXS18GVJU SiUS12-814 Step Procedure Points Take off the putty, and Place the thermistor so that remove each its end comes up to the end thermistor. of the presser spring. Be careful not to lose the presser spring for the discharge pipe thermistor.

  • Page 198: Removal Of Four-Way Valve, Solenoid Valve And Shunt

    SiUS12-814 Outdoor Unit – 2MXS18GVJU Removal of Four-Way Valve, Solenoid Valve and Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove 1 screw of the Reassembling precautions four-way valve coil.
  • Page 199 Outdoor Unit – 2MXS18GVJU SiUS12-814 Step Procedure Points Before taking this procedure, make sure there is no refrigerant gas Caution left in the refrigerant pipes. Be careful not to burn yourself Disconnect the 2 with the pipes and other parts brazed points (a) and that are heated by the gas (b) in this order.

  • Page 200: Removal Of Compressor

    SiUS12-814 Outdoor Unit – 2MXS18GVJU Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Disconnect the As a precaution, label the connections.
  • Page 201 Outdoor Unit – 2MXS18GVJU SiUS12-814 Step Procedure Points When heating up the brazed parts, make sure to Warning carry out the N2 The compressor's refrigerating replacement. machine oil may catch fire. Have wet cloth at hand for Disconnect the brazed quickly putting out the fire.

  • Page 202: Outdoor Unit - 4Mxs32Gvju

    SiUS12-814 Outdoor Unit – 4MXS32GVJU 2. Outdoor Unit – 4MXS32GVJU Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points External appearance The illustrations can be from front side.
  • Page 203 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Next, slide the grille Hooks downward to undo the 3 top hooks. (R6371) Remove the suction grille. (R6372) 2. Removing the top panel. Remove the 4 screws on the back and 1 screw on the left side panel.
  • Page 204 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Remove the 2 screws on the front and 1 screw on the right side panel. (R6374) Lift the top panel and remove it. (R6375) 3. Removing the right side panel. Remove the 5 screws. (R6376) Removal Procedure...
  • Page 205 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Slide the panel downward to undo 2 hooks on the back side. (R6377) Hooks (R6378) Hooks Hook Holes Hook Holes (R6379) Removal Procedure...
  • Page 206 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Remove the right side panel. (R6380) 4. Removing the front panel Front Panel (2) Remove the 2 screws. Front Panel (1) (R6381) Removal Procedure...
  • Page 207 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Slide the panel downward to undo the hook. (R6382) (R6383) Remove the front panel (2). (R6384) Removal Procedure...
  • Page 208 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points 5. Removing the front panel Remove the discharge grille and propeller fan first to remove Front the front panel (1). Remove the 4 screws Panel (1) on the discharge grille. Discharge grille (R6385) Pull the bottom of the discharge grille toward...
  • Page 209 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Next, slide the grille downward to undo the 2 hooks at the top. (R6387) Hooks (R6388) Remove the discharge grille. (R6389) Remove the propeller Fan fixing nut : M8 fan fixing nut. (R6390) Removal Procedure...
  • Page 210 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Remove the 2 fixing screws on the partition plate. (R6391) Remove the screw at bottom left of the front. (R6392) Remove the screw at bottom of the left side. (R6393) Removal Procedure...
  • Page 211 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Remove the screw at bottom of the back side. (R6394) The front panel (1) is provided with a hook on its front. Lift the front panel off position to remove it. Hook (R6395) Removal Procedure...
  • Page 212 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Remove the front panel (1). The back has an intricate shape. Be sure to detach carefully. (R6396) 6. Removing the rear panel Remove the fixing screw on the partition plate. (R6397) Removal Procedure...
  • Page 213 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Slide the panel leftward to undo the hook, and remove the partition plate. (R6398) Remove the 5 screws. (R6399) Removal Procedure...
  • Page 214 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Remove the wire fixing plate (upper). (R6400) Remove the 3 screws. (R6401) Remove the wire fixing plate (lower). (R6402) Removal Procedure...
  • Page 215 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Undo the holder of the The holder is secured in the thermistor. clearances of the heat exchanger fins. (R6403) Groove (R6404) Remove the 3 fixing screws on the partition plate. (R6405) Removal Procedure...
  • Page 216 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Remove the fixing screw from the bottom frame. (R6406) Remove the fixing screw from the shut-off valve mounting plate. (R6407) Lift the panel upward to undo the 2 hooks and remove it. Hooks Hooks (R6408)
  • Page 217 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Remove the rear panel. (R6409) Removal Procedure...

  • Page 218: Removal Of The Electrical Box

    SiUS12-814 Outdoor Unit – 4MXS32GVJU Removal of the Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the fixing screw from the shutoff valve mounting plate. (R6410) Remove the fixing screw on the partition...
  • Page 219 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Disconnect the fan [S70] motor connector S70. (R6413) Release the fan motor wire harness. (R6414) Disconnect the Detach the clamp. [S80] motorized valve Pull the push-mount type connector S80. out of position. Clamp (R6415) Disconnect the 4...
  • Page 220 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Disconnect the liquid pipe thermistor [S93] connector S93. Clamp (R6417) Disconnect the gas pipe thermistor connector [S92] S92. (R6418) Disconnect the discharge pipe [S90] thermistor connector S90. (R6419) Removal Procedure...
  • Page 221 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points The wire harness is hooked on the bottom of the electrical box. Unhook it and remove the clamp. Clamp (R6420) Disconnect the OL [S40] connector S40. (R6421) Remove the OL wire harness and the compressor wire harness together from the partition.
  • Page 222 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Use long-nose pliers to Detach the clamp. pull out the clamp. Pull the push-mount type out of position. Clamp (R6423) Disconnect the relay connector of the compressor. (R6469) First, slide the box leftward to undo the hook on the right side of the box.
  • Page 223 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Lift up the electrical box to remove it. (R6425) Removal Procedure...

  • Page 224: Removal Of Pcb

    SiUS12-814 Outdoor Unit – 4MXS32GVJU Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the Control PCB Open the cover of the Undo the 4 hooks.
  • Page 225 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Disconnect the Connectors S33 & S71: connectors one by one For inverter PCB starting from your side. Connectors S31 & S32: For SPM PCB Connectors S51 & S101: For display PCB Connector S10: For relay Connectors H1/H2: For DB (diode bridge), power wire harnesses AC1 (red) and...
  • Page 226 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points 3. Removing the display PCB. Disconnect the control PCB connectors S52, S102 (R6435) Slightly lift the top hooks to detach. (R6436) Undo the bottom hook to remove the display PCB. (R6437) Removal Procedure...
  • Page 227 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points 4. Removing the servicing cover off the terminal block assembly. Remove the screw. (R6438) Lift the hook to detach. (R6439) Open the cover toward yourself. (R6440) Removal Procedure...

  • Page 228: Removal Of Fan Motor

    SiUS12-814 Outdoor Unit – 4MXS32GVJU Removal of Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points (R6441) Remove the 2 screws Be sure to remove the bottom at the bottom first.

  • Page 229: Removal Of Coils / Thermistors

    Outdoor Unit – 4MXS32GVJU SiUS12-814 Removal of Coils / Thermistors Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the motorized 4MXS32GVJU has only 4 valve coil motorized valve coils.
  • Page 230 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Pull out the thermistors. Gas pipe thermistor (R6956) (R6448) Removal Procedure...
  • Page 231 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Peel the putty from the liquid pipe thermistor, and pull out the thermistor. Liquid pipe thermistor (R6957) (R6450) 2. Removal of Thermistors Pull out the heat exchanger thermistor. (R6451) Removal Procedure...
  • Page 232 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Remove the spring from Be careful not to lose the the heat exchanger spring. thermistor. Spring Spring (R6452) Slightly open the sound blanket. (R6453) Remove the sound blanket (top upper). (R6454) Removal Procedure...
  • Page 233 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Remove the discharge pipe thermistor. (R6455) Remove the fixture. (R6456) 3. Removing the Four-way valve coil and motorized valve coil Remove the screw. (R6457) Removal Procedure...
  • Page 234 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Remove the Four-way valve coil. (R6458) Removal Procedure...

  • Page 235: Removal Of Sound Blanket

    Outdoor Unit – 4MXS32GVJU SiUS12-814 Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Undo the 2 Velcro tapes off the sound blanket, and open the sound blanket (outer sleeve).
  • Page 236 SiUS12-814 Outdoor Unit – 4MXS32GVJU Step Procedure Points Remove the sound The sound blanket is fragile. blanket (outer sleeve). Be careful of the notches of the compressor mount (3 locations). (R6462) Remove the sound The sound blanket is fragile. blanket (top lower). Carefully pass the discharge pipe through it.
  • Page 237 Outdoor Unit – 4MXS32GVJU SiUS12-814 Step Procedure Points Remove the sound blanket (outer sleeve). (R6465) Removal Procedure...

  • Page 238: Removal Of Compressor

    SiUS12-814 Outdoor Unit – 4MXS32GVJU Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. (R6466) Pull out the 3 leads U : red, V : yellow, W : blue U(red) using long-nose pliers.
  • Page 239 Outdoor Unit – 4MXS32GVJU SiUS12-814 Removal Procedure...

  • Page 240: Part 8 Others

    SiUS12-814 Part 8 Others 1. Others .....................228 1.1 Test Run from the Remote Controller ............228 1.2 Jumper Settings ..................229 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................230 Others...

  • Page 241: Others

    Others SiUS12-814 1. Others Test Run from the Remote Controller Trial Operation and Testing 1. Measure the supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating mode. For Heat pump In cooling mode, select the lowest programmable temperature;...

  • Page 242: Jumper Settings

    SiUS12-814 Others Jumper Settings 1.2.1 When Two Units are Installed in One Room How to set the different addresses. When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. PCB in the indoor unit Remove the front panel.

  • Page 243: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    Others SiUS12-814 Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board of an outdoor unit is replaced, it is required that silicon grease (*1) is certainly applied to the heat radiation part (the contact point to the heat radiation fin) of the power transistor and diode bridge.

  • Page 244: Part 9 Appendix

    SiUS12-814 Part 9 Appendix 1. Piping Diagrams..................232 1.1 Indoor Units ....................232 1.2 Outdoor Units ................... 233 2. Wiring Diagrams..................234 2.1 Indoor Units ....................234 2.2 Outdoor Units ................... 236 Appendix...

  • Page 245: Piping Diagrams

    Piping Diagrams SiUS12-814 1. Piping Diagrams Indoor Units CTXS09GVJU, CTXS12GVJU FTXS15DVJU, FTXS18DVJU INDOOR UNIT INDOOR UNIT ( 5/16CuT ) ( 5/16CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR ON HEAT EXCH. THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING CROSS FLOW FAN...

  • Page 246: Outdoor Units

    SiUS12-814 Piping Diagrams Outdoor Units 2MXS18GVJU OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) HEADER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLA ) 1/4CuT HEADER 3/8CuT ROOM A FIELD FILTER ( 1/4CuT ) MOTOR OPERATED VALVE PIPING LIQUID PIPE THERMISTOR ( DLB ) LIQUID...

  • Page 247: Wiring Diagrams

    Wiring Diagrams SiUS12-814 2. Wiring Diagrams Indoor Units CTXS09GVJU, CTXS12GVJU FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A OUTDOOR t° CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS PCB4 TURNED OFF AND THEN BACK ON AGAIN.
  • Page 248 SiUS12-814 Wiring Diagrams FDXS09DVJU, FDXS12DVJU PCB1 PCB2 V1TR outdoor 3.15A FIELD WIRING. TERMINAL FOR CAUTION CENTRALIZED CONTROL TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK SIGNAL ON AGAIN. RECEIVER 2 RTH1 H1P ~ H3P : PILOT LAMP...

  • Page 249: Outdoor Units

    Wiring Diagrams SiUS12-814 Outdoor Units 2MXS18GVJU POWER SUPPLY FU201 MID2 ~ 60Hz 208-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A MID1 R12T CN14 3.15A t° ROOM B S101 12 1 t° t° t° t° t° t°...

  • Page 250: Index

    SiUS12-814 Index Numerics check No.12.............165 check No.13.............165 3-D airflow ..............26 check No.14.............166 3-minute standby............43 check No.15.............166 check No.16.............167 check No.4...............159 A1................114 check No.5...............160 A5..............115, 125 check No.6...............161 A6..............117, 118 check No.7...............162 AC1 ..............21, 212 check No.8...............163 AC2 ..............
  • Page 251 SiUS12-814 A5 ............. 115, 125 FU201 ................18 A6 ............. 117, 118 FU3 ................21 C4 ..............121 functions ..............2 C9 ..............121 fuse ..............14, 16, 21 E1 ..............127 E5 ..............128 E6 ..............129 gas pipe isothermal control during cooling ....52 E7 ..............
  • Page 252 SiUS12-814 L5 ................149 preheating operation..........43 LED A............14, 16, 18, 21 preparation before operation ........75 LED1 ............14, 16, 18, 21 pressure equalization control........52 LED2 ............14, 16, 18, 21 preventing indoor freezing .........56 LED3 ............14, 16, 18, 21 printed circuit board (PCB) LED4 ..............
  • Page 253 SiUS12-814 S71............18, 178, 212 troubleshooting with the operation lamp ....104 S72................18 turning speed pulse input on the outdoor unit PCB S8................14 check ..............166 S80............18, 21, 172, 206 S90..........18, 21, 172, 184, 207 S91................18 U0 ..............151, 153 S92..........
  • Page 254 SiUS12-814 Drawings & Flow Charts Numerics 3-D airflow ..............26 Hall IC check............167 heating peak-cut control ..........45 high pressure control in cooling .......136 anti-icing function in other rooms ......157 HOME LEAVE operation ...........34 ARC433..............107 automatic airflow control ........... 27 automatic operation...........
  • Page 255 SiUS12-814 power supply waveforms check ......164 power transistor............230 power transistor check ..........165 POWERFUL operation..........35 priority room setting........... 59 program dry function ..........28 radiation fin temperature rise ........147 remote controller ............. 107 service check function..........107 service monitor PCB ...........
  • Page 256 AMERICAS 1645 Wallace Drive, Suite 110 Carrollton, TX75006 info@daikinac.com www.daikinac.com Specifications, designs and other content appearing in this brochure are current as of December 2008 but subject to change without notice. SiUS12-814 Printed in U.S.A. 12/2008 B AK...

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