Page 1 SiUS04 - 702 Inverter Pair Wall Mounted Type D-Series [Applied Models] Inverter Pair : Heat Pump...
Page 2 SiUS04-702 Inverter Pair D-Series Heat Pump Indoor Unit FTXS09DVJU FTXS12DVJU FTXS15DVJU FTXS18DVJU FTXS24DVJU Outdoor Unit RX09FVJU RX12FVJU RX15FVJU RX18FVJU RX24FVJU Table of Contents...
Page 3: Table Of Contents
SiUS04-702 1. Introduction ....................vi 1.1 Safety Cautions ...................vi 1.2 Used Icons ....................x Part 1 List of Functions ..............1 1. List of Functions ..................2 Part 2 Specifications ...............3 1. Specifications ..................... 4 Part 3 Printed Circuit Board Connector Wiring Diagram ....7 1.
Page 4 SiUS04-702 3.14 Additional Function..................46 4. Control Specification (15/18/24 Class)............. 47 4.1 Mode Hierarchy ..................47 4.2 Frequency Control..................48 4.3 Controls at Mode Changing / Start-up............50 4.4 Discharge Pipe Temperature Control............51 4.5 Input Current Control................. 52 4.6 Freeze-up Protection Control ..............53 4.7 Heating Peak-cut Control ................
Page 5 SiUS04-702 4.18 Electrical Box Temperature Rise............. 156 4.19 Radiation Fin Temperature Rise ............. 158 4.20 Output Over Current Detection..............160 4.21 Insufficient Gas..................164 4.22 Over-voltage Detection................168 4.23 Low-voltage Detection................169 5. Check ..................... 170 5.1 How to Check ..................170 Part 7 Removal Procedure ............181 1.
Page 6 SiUS04-702 Part 9 Appendix................283 1. Piping Diagrams..................284 1.1 Indoor Units ..................... 284 1.2 Outdoor Units ..................285 2. Wiring Diagrams..................287 2.1 Indoor Units ..................... 287 2.2 Outdoor Units ..................288 Index ....................i Drawings & Flow Charts ..............vii Table of Contents...
Page 7: Introduction
Introduction SiUS04-702 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
Page 8 SiUS04-702 Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2m). Insufficient safety measures may cause a fall accident. In case of R410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R410A refrigerant.
Page 9 Introduction SiUS04-702 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 10 SiUS04-702 Introduction 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 11: Used Icons
Introduction SiUS04-702 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 12: Part 1 List Of Functions
SiUS04-702 Part 1 List of Functions 1. List of Functions ..................2 List of Functions...
Page 13: List Of Functions
List of Functions SiUS04-702 1. List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Operation Limit for Cooling (°FDB) Photocatalytic Deodorizing Filter — — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°FWB) Deodorizing Function PAM Control...
Page 14: Part 2 Specifications
SiUS04-702 Part 2 Specifications 1. Specifications ..................... 4 Specifications...
Page 15: Specifications
Specifications SiUS04-702 1. Specifications 230V Indoor Units FTXS09DVJU FTXS12DVJU Models RX09FVJU RX12FVJU Outdoor Units Cooling Heating Cooling Heating Capacity Btu/h 8,500 (5,100~8,500) 10,000 (5,100~10,000) 11,500 (5,500~11,500) 11,500 (5,500~11,500) Rated (Min.~Max.) Moisture Removal Pt/h — — Running Current (Rated) 4.56 5.21 6.00...
Page 16 SiUS04-702 Specifications 230V Indoor Units FTXS15DVJU FTXS18DVJU Model RX15FVJU RX18FVJU Outdoor Units Cooling Heating Cooling Heating Capacity Btu/h 15,000 (6,800~15,000) 18,000 (6,800~21,200) 18,000 (6,800~18,000) 21,600 (6,800~24,000) Rated (Min.~Max.) Moisture Removal Pt/h — — Running Current (Rated) 6.01 7.58 7.67 9.58 Power Consumption Rated (Min.~Max.) 1,360(450~1,360) 1,730(450~2,540)
Page 17 Specifications SiUS04-702 230V Indoor Units FTXS24DVJU Model RX24FVJU Outdoor Units Cooling Heating Capacity Btu/h 22,000 (7,500~22,000) 24,000 (7,500~25,400) Rated (Min.~Max.) Moisture Removal Pt/h — Running Current (Rated) 11.35 12.43 Power Consumption Rated (Min.~Max.) 2,600(450~2,600) 2,850(450~3,320) Power Factor 99.6 99.7 EER (Rated) Btu/h·W —...
Page 18: Part 3 Printed Circuit Board Connector Wiring Diagram
SiUS04-702 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........8 1.1 FTXS09/12DVJU..................8 1.2 FTXS15/18/24DVJU.................. 10 1.3 RX09/12FVJU ................... 12 1.4 RX15/18/24FVJU ..................14 Printed Circuit Board Connector Wiring Diagram...
Page 19: Printed Circuit Board Connector Wiring Diagram
Printed Circuit Board Connector Wiring Diagram SiUS04-702 1. Printed Circuit Board Connector Wiring Diagram FTXS09/12DVJU Connectors PCB(1) (Control PCB) (indoor unit) PCB(2) (Signal Receiver PCB) Connector for fan motor Connector for swing motor (horizontal blades) Connector for fan motor (Hall IC) Connector for centralized control (HA)
Page 20 SiUS04-702 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) PCB(2): Signal Receiver PCB Signal Receiver PCB Control PCB LED1 LED2 LED3 RTH1 LED A (R4011) PCB(3): INTELLIGENT EYE sensor PCB (R3321) Printed Circuit Board Connector Wiring Diagram...
Page 21: Ftxs15/18/24Dvju
Printed Circuit Board Connector Wiring Diagram SiUS04-702 FTXS15/18/24DVJU 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) 5) S26...
Page 22 SiUS04-702 Printed Circuit Board Connector Wiring Diagram PCB Detail 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 23: Rx09/12Fvju
Printed Circuit Board Connector Wiring Diagram SiUS04-702 RX09/12FVJU Connectors PCB(1)(Filter PCB) Connector for control PCB PCB(2)(Control PCB) (outdoor unit) Connector for filter PCB Connector for electronic expansion valve coil Connector for compressor motor Connector for overload protector Connector for fan motor Connector for four way valve coil Connector for thermistors (outdoor air, heat exchanger, discharge pipe)
Page 24 SiUS04-702 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Filter PCB FU3(20A) (R6969) PCB(2): Control PCB (outdoor unit) S40 LED A FU2(3.15A) FU1(3.15A) (R6970) Printed Circuit Board Connector Wiring Diagram...
Page 25: Rx15/18/24Fvju
Printed Circuit Board Connector Wiring Diagram SiUS04-702 RX15/18/24FVJU Connectors PCB(1)(Control PCB) (outdoor unit) 1) S10, Connector for terminal strip Connector for electronic expansion valve coil 3) S31, Connector for SPM 4) S33, Connector for MID Connector for overload protector 6) S51, S101 Connector for service monitor PCB Connector for four way valve coil...
Page 26 SiUS04-702 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (outdoor unit) FU2(3.15A) S101 (R6971) PCB(2): Power Supply PCB Service Monitor PCB FU1(30A) HAC1 LED A S102 (R5140) (R2866) Printed Circuit Board Connector Wiring Diagram...
Page 27 Printed Circuit Board Connector Wiring Diagram SiUS04-702 FU201 (3.15A) (R2868) CN11 CN14 (R2869) Printed Circuit Board Connector Wiring Diagram...
Page 28: Part 4 Function And Control
SiUS04-702 Part 4 Function and Control 1. Main Functions..................19 1.1 Frequency Principle................... 19 1.2 Power-Airflow Dual Flaps, Wide-Angle Louvres and Auto-Swing ..... 21 1.3 Fan Speed Control for Indoor Units............22 1.4 Programme Dry Function ................23 1.5 Automatic Operation.................. 24 1.6 Thermostat Control..................
Page 29 SiUS04-702 4.12 Electronic Expansion Valve Control ............56 4.13 Malfunctions ....................59 4.14 Forced Operation Mode ................60 4.15 Additional Function..................60 Function and Control...
Page 30: Main Functions
SiUS04-702 Main Functions 1. Main Functions Note: See the list of functions for the functions applicable to different models. Frequency Principle Main Control The compressor is frequency-controlled during normal operation. The target frequency is set by the following 2 parameters coming from the operating indoor unit: Parameters The load condition of the operating indoor unit The difference between the room temperature and the set temperature...
Page 31 Main Functions SiUS04-702 Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outdoor air temperature and cooling / heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables a quick set temperature.
Page 32: Power-Airflow Dual Flaps, Wide-Angle Louvres And Auto-Swing
SiUS04-702 Main Functions Power-Airflow Dual Flaps, Wide-Angle Louvres and Auto- Swing Power-Airflow The large flaps send a large volume of air downwards to the floor. The flap provides an optimum control area in cooling, heating and dry mode. Dual Flaps Heating Mode During heating mode, the large flap enables direct warm air straight downwards.
Page 33: Fan Speed Control For Indoor Units
Main Functions SiUS04-702 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 trouble shooting for fan motor on page 126.
Page 34: Programme Dry Function
SiUS04-702 Main Functions Programme Dry Function Programme dry function removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and air flow 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 35: Automatic Operation
Main Functions SiUS04-702 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 36: Thermostat Control
SiUS04-702 Main Functions Thermostat Control Thermostat control is based on the difference between the room temperature and the setpoint. Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference is above the zone C after being in the zone A. The system resumes from defrost control in any zones except A.
Page 37: Night Set Mode
Main Functions SiUS04-702 NIGHT SET Mode When the OFF timer is set, the NIGHT SET circuit automatically activates. The NIGHT SET circuit maintains the airflow setting made by users. The NIGHT SET The NIGHT SET circuit continues heating or cooling the room at the set temperature for the first one hour, then automatically raises the temperature setting slightly in the case of cooling, or lowers Circuit it slightly in the case of heating, for economical operations.
Page 38: Intelligent Eye
SiUS04-702 Main Functions INTELLIGENT EYE This is the function that detects existence of humans in the room by a human motion sensor (INTELLIGENT EYE) and reduces the capacity when there is no human in the room in order to save electricity. Processing 1.
Page 39 Main Functions SiUS04-702 Since the set temperature is shifted by ∆ 3.6°F higher for 40 minutes, compressor speed becomes low and can realize energy saving operation. But as thermostat is prone to be off by the fact that the set temperature has been shifted, the thermostat-off action is prohibited in 40 minutes so as to prevent this phenomena.
Page 40: Home Leave Operation
SiUS04-702 Main Functions HOME LEAVE Operation Outline In order to respond to the customer's need for immediate heating and cooling of the room after returning home or for house care, a measure to switch the temperature and air volume from that for normal time over to outing time by one touch is provided.
Page 41: Inverter Powerful Operation
Main Functions SiUS04-702 1.10 Inverter POWERFUL Operation Outline In order to exploit 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 POWERFUL button is pushed in each operation mode, the fan speed / setting temperature will be converted to the following states in a period of twenty minutes.
Page 42: Other Functions
SiUS04-702 Main Functions 1.11 Other Functions 1.11.1 Hot Start Function Heat Pump Only In order to prevent the cold air blast that normally comes when heating is started, the temperature of the heat exchanger of the indoor unit is detected, and either the air flow is stopped or is made very weak thereby carrying out comfortable heating of the room.
Page 43 Main Functions SiUS04-702 1.11.4 Air Purifying Filter with Photocatalytic Deodorizing Function This filter incorporates the benefits the Air Purifying Filter and Photocatalytic Deodorizing Filter in a single unit. Combining the two filters in this way increases the active surface area of the new filter. This larger surface area allows the filter to effectively trap microscopic particles, decompose odours and deactivate bacteria and viruses even for the high volume of air required to air-condition large living rooms.
Page 44: Function Of Thermistor
SiUS04-702 Function of Thermistor 2. Function of Thermistor Heat Pump Model Electrontic expansion valve Four way valve Compressor (R5204) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. Exchanger The system sets a target discharge temperature according to the outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve opening so that the target Thermistor discharge temperature can be obtained.
Page 45: Control Specification (09/12 Class)
Control Specification (09/12 Class) SiUS04-702 3. Control Specification (09/12 Class) 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 For heat pump model There are following modes;...
Page 46: Frequency Control
SiUS04-702 Control Specification (09/12 Class) Frequency Control Outline Frequency will be determined according to the difference between room and set temperature. The function is explained as follows. 1. How to determine frequency. 2. Frequency command from an indoor unit. (The difference between a room temperature and the temperature set by the remote controller.) 3.
Page 47 Control Specification (09/12 Class) SiUS04-702 Indoor Frequency Command ( ∆ D signal) The difference between a room temperature and the temperature set by the remote controller will be taken as the “ ∆ D signal” and is used for frequency command. ∆D ∆D ∆D...
Page 48: Controls At Mode Changing / Start-Up
SiUS04-702 Control Specification (09/12 Class) Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline Operate the inverter in the open phase operation with the conditions including the preheating command from the discharge pipe temperature. Detail Preheating ON Condition When the discharge pipe temperature is below 50ºF, inverter in open phase operation starts. (The power consumption of compressor during preheat operation is 35 W.) OFF Condition When the discharge pipe temperature is higher than 54ºF, inverter in open phase operation...
Page 49: Discharge Pipe Temperature Control
Control Specification (09/12 Class) SiUS04-702 3.3.4 3-minutes Standby Prohibit to turn ON the compressor for 3 minutes after turning it off. (except when defrosting) 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows. (The function must not be used when defrosting.) FCG 3 FCG 2...
Page 50: Input Current Control
SiUS04-702 Control Specification (09/12 Class) Input Current Control Outline Detect an input current by the CT during the compressor is running, and set the frequency upper limit from such input current. In case of heat pump model, this control is the upper limit control function of the frequency which takes priority of the lower limit of four way valve activating compensation.
Page 51: Heating Peak-Cut Control
Control Specification (09/12 Class) SiUS04-702 Heating Peak-cut Control Outline Heat Pump Only During heating operation, the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure. (The signal from the indoor unit must be divided as follows.) Detail Conditions for Start Controlling...
Page 52: Defrost Control
SiUS04-702 Control Specification (09/12 Class) 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 53: Electronic Expansion Valve Control
Control Specification (09/12 Class) SiUS04-702 3.11 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.
Page 54 SiUS04-702 Control Specification (09/12 Class) 3.11.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 3.11.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
Page 55 Control Specification (09/12 Class) SiUS04-702 3.11.7 Control when frequency is changed When the target discharge pipe temperature control is active, if the target frequency is changed for a specified value in a certain time period, cancel the target discharge pipe temperature control and change the target opening of the electronic expansion valve according to the shift.
Page 56: Malfunctions
SiUS04-702 Control Specification (09/12 Class) 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction may occur in the thermistor. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Outdoor air thermistor 3.12.2 Detection of Overload and Over Current Outline In order to protect the inverter, detect an excessive output current, and for protecting compressor, monitor the OL operation.
Page 57: Forced Operation Mode
Control Specification (09/12 Class) SiUS04-702 Detail I Judgment by power consumption When an output frequency is exceeds 55 Hz and the input current is less than specified value, the adjustment is made for insufficient gas. II Judgment by discharge pipe temperature When discharge pipe temperature is ∆...
Page 58: Control Specification (15/18/24 Class)
SiUS04-702 Control Specification (15/18/24 Class) 4. Control Specification (15/18/24 Class) 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 For heat pump model There are following modes;...
Page 59: Frequency Control
Control Specification (15/18/24 Class) SiUS04-702 Frequency Control Outline Frequency will be determined according to the difference between room and set temperature. The function is explained as follows. 1. How to determine frequency. 2. Frequency command from an indoor unit. (The difference between a room temperature and the temperature set by the remote controller.) 3.
Page 60 SiUS04-702 Control Specification (15/18/24 Class) Indoor Frequency Command ( ∆ D signal) The difference between a room temperature and the temperature set by the remote controller will be taken as the “ ∆ D signal” and is used for frequency command. ∆D ∆D ∆D...
Page 61: Controls At Mode Changing / Start-Up
Control Specification (15/18/24 Class) SiUS04-702 Controls at Mode Changing / Start-up 4.3.1 Preheating Operation Outline Operate the inverter in the open phase operation with the conditions including the preheating command from the indoor, the outdoor air temperature and discharge pipe temperature. Detail Preheating ON Condition When outdoor air temperature and discharge pipe temperature are below 51ºF, inverter in open...
Page 62: Discharge Pipe Temperature Control
SiUS04-702 Control Specification (15/18/24 Class) 4.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows. (The function must not be used when defrosting.) FCG 3 FCG 2 FCG 1 Discharge Pipe Temperature Control Outline The discharge pipe temperature is used as the compressor's internal temperature.
Page 63: Input Current Control
Control Specification (15/18/24 Class) SiUS04-702 Input Current Control Outline Detect an input current by the CT during the compressor is running, and set the frequency upper limit from such input current. In case of heat pump model, this control is the upper limit control function of the frequency which takes priority of the lower limit of four way valve activating compensation.
Page 64: Freeze-Up Protection Control
SiUS04-702 Control Specification (15/18/24 Class) 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 the followings.
Page 65: Fan Control
Control Specification (15/18/24 Class) SiUS04-702 Fan Control Outline Fan control is carried out according to the following priority. 1. Fan ON control for electric component cooling fan 2. Fan control when defrosting 3. Fan OFF delay when stopped 4. ON/OFF control in cooling operation 5.
Page 66: Low Hz High Pressure Limit
SiUS04-702 Control Specification (15/18/24 Class) 4.10 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 of Hz. Separate into three zones, reset zone, unchanged zone and drooping zone and the frequency control must be carried out in such zones.
Page 67: Electronic Expansion Valve Control
Control Specification (15/18/24 Class) SiUS04-702 4.12 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.
Page 68 SiUS04-702 Control Specification (15/18/24 Class) 4.12.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 4.12.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
Page 69 Control Specification (15/18/24 Class) SiUS04-702 4.12.7 Control when frequency is changed When the target discharge pipe temperature control is active, if the target frequency is changed for a specified value in a certain time period, cancel the target discharge pipe temperature control and change the target opening of the electronic expansion valve according to the shift.
Page 70: Malfunctions
SiUS04-702 Control Specification (15/18/24 Class) 4.13 Malfunctions 4.13.1 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.
Page 71: Forced Operation Mode
Control Specification (15/18/24 Class) SiUS04-702 Detail Judgment by Input Current When an output frequency is exceeds 55 Hz and the input current is less than specified value, the adjustment is made for insufficient gas. Judgment by Discharge Pipe Temperature When discharge pipe temperature is ∆ 36°F higher than target value and the electronic expansion value opening is 450 plus (max.), the adjustment is made for insufficient gas.
Page 72: Part 5 Operation Manual
SiUS04-702 Part 5 Operation Manual 1. System Configuration................62 2. Instruction....................63 2.1 Safety Precautions ..................63 2.2 FTXS09/12DVJU..................65 2.3 FTXS15/18/24DVJU.................. 90 Operation Manual...
Page 73: System Configuration
System Configuration SiUS04-702 1. System Configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know a clever method of using it.
Page 74: Instruction
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. • If the air conditioner is not cooling (heating) properly, the refrigerant may be leaking, contact your authorized dealer or qualified service repairman.
Page 75 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 76: Ftxs09/12Dvju
SiUS04-702 Instruction FTXS09/12DVJU 2.2.1 Names of Parts Operation Manual...
Page 77 Instruction SiUS04-702 Operation Manual...
Page 78 SiUS04-702 Instruction Operation Manual...
Page 79 Instruction SiUS04-702 2.2.2 Preparation before Operation Operation Manual...
Page 80 SiUS04-702 Instruction Operation Manual...
Page 81 Instruction SiUS04-702 Operation Manual...
Page 82 SiUS04-702 Instruction 2.2.3 AUTO · DRY · COOL · HEAT · FAN Operation Operation Manual...
Page 83 Instruction SiUS04-702 Operation Manual...
Page 84 SiUS04-702 Instruction 2.2.4 Adjusting the Airflow Direction Operation Manual...
Page 85 Instruction SiUS04-702 Operation Manual...
Page 86 SiUS04-702 Instruction 2.2.5 POWERFUL Operation Operation Manual...
Page 87 Instruction SiUS04-702 2.2.6 OUTDOOR UNIT QUIET Operation Operation Manual...
Page 88 SiUS04-702 Instruction 2.2.7 HOME LEAVE Operation Operation Manual...
Page 89 Instruction SiUS04-702 Operation Manual...
Page 90 SiUS04-702 Instruction 2.2.8 INTELLIGENT EYE Operation Operation Manual...
Page 91 Instruction SiUS04-702 Operation Manual...
Page 92 SiUS04-702 Instruction 2.2.9 TIMER Operation Operation Manual...
Page 93 Instruction SiUS04-702 Operation Manual...
Page 94 SiUS04-702 Instruction 2.2.10 Care and Cleaning Operation Manual...
Page 95 Instruction SiUS04-702 Operation Manual...
Page 96 SiUS04-702 Instruction Operation Manual...
Page 97 Instruction SiUS04-702 Operation Manual...
Page 98 SiUS04-702 Instruction Operation Manual...
Page 99 Instruction SiUS04-702 Operation Manual...
Page 100 SiUS04-702 Instruction 3P141693-1K Operation Manual...
Page 101: Ftxs15/18/24Dvju
Instruction SiUS04-702 FTXS15/18/24DVJU 2.3.1 Names of Parts Operation Manual...
Page 102 SiUS04-702 Instruction Operation Manual...
Page 103 Instruction SiUS04-702 Operation Manual...
Page 104 SiUS04-702 Instruction 2.3.2 Preparation before Operation Operation Manual...
Page 105 Instruction SiUS04-702 Operation Manual...
Page 106 SiUS04-702 Instruction Operation Manual...
Page 107 Instruction SiUS04-702 2.3.3 AUTO · DRY · COOL · HEAT · FAN Operation Operation Manual...
Page 108 SiUS04-702 Instruction Operation Manual...
Page 109 Instruction SiUS04-702 2.3.4 Adjusting the Airflow Direction Operation Manual...
Page 110 SiUS04-702 Instruction Operation Manual...
Page 111 Instruction SiUS04-702 2.3.5 POWERFUL Operation Operation Manual...
Page 112 SiUS04-702 Instruction 2.3.6 OUTDOOR UNIT QUIET Operation Operation Manual...
Page 113 Instruction SiUS04-702 2.3.7 HOME LEAVE Operation Operation Manual...
Page 114 SiUS04-702 Instruction Operation Manual...
Page 115 Instruction SiUS04-702 2.3.8 INTELLIGENT EYE Operation Operation Manual...
Page 116 SiUS04-702 Instruction Operation Manual...
Page 117 Instruction SiUS04-702 2.3.9 TIMER Operation Operation Manual...
Page 118 SiUS04-702 Instruction Operation Manual...
Page 119 Instruction SiUS04-702 2.3.10 Care and Cleaning Operation Manual...
Page 120 SiUS04-702 Instruction Operation Manual...
Page 121 Instruction SiUS04-702 Operation Manual...
Page 122 SiUS04-702 Instruction 2.3.11 Troubleshooting Operation Manual...
Page 123 Instruction SiUS04-702 Operation Manual...
Page 124 SiUS04-702 Instruction Operation Manual...
Page 125 Instruction SiUS04-702 3P141693-2K Operation Manual...
Page 126: Part 6 Service Diagnosis
SiUS04-702 Part 6 Service Diagnosis 1. Caution for Diagnosis................116 2. Problem Symptoms and Measures ............118 3. Service Check Function ................. 119 4. Troubleshooting ..................122 4.1 Error Codes and Description ..............122 4.2 Indoor Unit PCB Abnormality ..............123 4.3 Freeze-up Protection Control or High Pressure Control......
Page 127: Caution For Diagnosis
Caution for Diagnosis SiUS04-702 1. Caution for Diagnosis 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. 2.
Page 128 SiUS04-702 Caution for Diagnosis Troubleshooting The outdoor unit has one green LED (LED A) on the PCB. The flashing green LED indicates normal condition of microcomputer operation. with LED Indication 15/18/24 Class Service Diagnosis...
Page 129: Problem Symptoms And Measures
Problem Symptoms and Measures SiUS04-702 Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page None of the units operates. Check the power supply. Check to make sure that the rated voltage is — supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...
Page 130: Service Check Function
SiUS04-702 Service Check Function Service Check Function In the ARC433B 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 131 Service Check Function SiUS04-702 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 132 SiUS04-702 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. “pi” : The both numbers of tens and units do not accord with the error code. “pi pi”...
Page 133: Troubleshooting
Troubleshooting SiUS04-702 Troubleshooting Error Codes and Description Reference Page Code Description 09/12 15/18/24 Indication Class Class System Normal — — Insufficient gas Over-voltage detection — Low-voltage detection — Signal transmission error (between indoor and outdoor unit) Indoor Indoor unit PCB abnormality Unit Freeze-up protection control or high pressure control...
Page 134: Indoor Unit Pcb Abnormality
SiUS04-702 Troubleshooting 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 Faulty connector connection Causes Troubleshooting...
Page 135: Freeze-Up Protection Control Or High Pressure Control
Troubleshooting SiUS04-702 Freeze-up Protection Control High Pressure Control Remote Controller Display Method of High pressure control (heat pump model only) During heating operations, the temperature detected by the indoor heat exchanger thermistor is Malfunction used for the high pressure control (stop, outdoor fan stop, etc.) Detection Freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
Page 136 SiUS04-702 Troubleshooting 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.173 Check the air passage. Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.
Page 137: Fan Motor Or Related Abnormality
Troubleshooting SiUS04-702 Fan Motor or Related Abnormality 4.4.1 AC Motor Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction 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 138 SiUS04-702 Troubleshooting 4.4.2 DC Motor Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection When the detected rotation speed does not reach the demanded rotation speed of the target tap, Malfunction and is less than 50% of the maximum fan motor rotation speed.
Page 139 Troubleshooting SiUS04-702 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 and rotate fan by hand. Refer to P.170 Does fan rotate Replace fan motor. smoothly? Turn power ON and operate fan.
Page 140: Thermistor Or Related Abnormality (Indoor Unit)
SiUS04-702 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection When the thermistor input is more than 4.96 V or less than 0.04 V during compressor operation ∗ . Malfunction ∗...
Page 141: Signal Transmission Error (Between Indoor And Outdoor Unit)
Troubleshooting SiUS04-702 Signal Transmission Error (between Indoor and Outdoor Unit) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of the data is abnormal.
Page 142 SiUS04-702 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.176 connection wires. Is there any wiring error? Correct the indoor unit-outdoor unit connection wires.
Page 143: Ol Activation (Compressor Overload)
Troubleshooting SiUS04-702 OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will be shut down. The error counter will reset itself if this or any other error does not occur during the following 60- Decision minute compressor running time (total time).
Page 144: Compressor Lock
SiUS04-702 Troubleshooting Compressor Lock 4.8.1 09/12 Class Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The system judges the compressor lock, and stops due to over current. The system judges the compressor lock, and cannot operation with position detection within 15 Decision seconds after start up.
Page 145 Troubleshooting SiUS04-702 4.8.2 15/18/24 Class Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The position detection circuit detects a compressor frequency of below 10 Hz for 20 seconds or a frequency of above 160 Hz.
Page 146: Dc Fan Lock
SiUS04-702 Troubleshooting DC Fan Lock Remote Controller Display Method of A fan motor or related error is detected by checking the high-voltage fan motor rpm being detected by the Hall IC. Malfunction Detection Malfunction The fan does not start in 30 seconds even when the fan motor is running. The system will be shut down if the error occurs 16 times.
Page 147: Input Over Current Detection
Troubleshooting SiUS04-702 4.10 Input Over Current Detection 4.10.1 09/12 Class Remote Controller Display Method of An input over-current is detected by checking the input current value with the compressor running. Malfunction Detection Malfunction The following current with the compressor running continues for 2.5 seconds. Cooling ·...
Page 148 SiUS04-702 Troubleshooting 4.10.2 15/18/24 Class emote Controller Display Method of An input over-current is detected by checking the input current value being detected by CT with the compressor running. Malfunction Detection Malfunction The following CT input with the compressor running continues for 2.5 seconds. Decision CT input : Above 20 A The system will be shut down if the error occurs 16 times.
Page 149 Troubleshooting SiUS04-702 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 reconnected for part replacement, for example, and the system is interrupted by an input over-current, Refer to P.174 take the following procedure.
Page 150: Four Way Valve Abnormality
SiUS04-702 Troubleshooting 4.11 Four Way Valve Abnormality 4.11.1 09/12 Class Remote Controller Display Method of The indoor air temperature thermistor, the indoor unit heat exchanger thermistor, the outdoor temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if they Malfunction function within their normal ranges in the operating mode.
Page 151 Troubleshooting SiUS04-702 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.171 Four way valve coil Correct. disconnected (loose)? Check No.06 Refer to P.173 Reconnect. Harness out of connector? Check No.11 Refer to P.176...
Page 152 SiUS04-702 Troubleshooting 4.11.2 15/18/24 Class Remote Controller Display Method of The room temperature thermistor, the indoor unit heat exchanger thermistor, the outdoor temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if they Malfunction function within their normal ranges in the operating mode. Detection Malfunction A following condition continues over 1 minute after operating 10 minutes.
Page 153 Troubleshooting SiUS04-702 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.171 Four way valve coil Correct. disconnected (loose)? Check No.06 Refer to P.173 Harness out of connector? Reconnect.
Page 154: Discharge Pipe Temperature Control
SiUS04-702 Troubleshooting 4.12 Discharge Pipe Temperature Control 4.12.1 09/12 Class Remote Controller Display Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the temperature being detected by the discharge pipe thermistor. Malfunction Detection Malfunction If a stop takes place 4 times successively due to abnormal discharge pipe temperature, the system will be shut down.
Page 155 Troubleshooting SiUS04-702 4.12.2 15/18/24 Class Remote Controller Display Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the temperature being detected by the discharge pipe thermistor. Malfunction Detection Malfunction If a stop takes place 6 times successively due to abnormal discharge pipe temperature, the system will be shut down.
Page 156: High Pressure Control In Cooling
SiUS04-702 Troubleshooting 4.13 High Pressure Control in Cooling 4.13.1 09/12 Class Remote Controller Display Method of High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the temperature being sensed by the heat exchanger thermistor exceeds the limit. Malfunction Detection Malfunction...
Page 157 Troubleshooting SiUS04-702 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.170 Check the installation space. Check No.06 Check No. 07 Abnormal Installation condition Change the air outlet grille Refer to P.173 check position.
Page 158 SiUS04-702 Troubleshooting 4.13.2 15/18/24 Class Remote Controller Display Method of High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the temperature being sensed by the heat exchanger thermistor exceeds the limit. Malfunction Detection Malfunction Activated when the temperature being sensed by the heat exchanger thermistor rises above 140°F. (Deactivated when the said temperature drops below 122°F.) Decision Conditions...
Page 159 Troubleshooting SiUS04-702 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.170 Check No. 07 Abnormal Check No.06 Installation condition Change the air outlet grille check position.
Page 160: Position Sensor Abnormality
SiUS04-702 Troubleshooting 4.14 Position Sensor Abnormality 4.14.1 09/12 Class Remote Controller Display Method of A compressor startup failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal is sent.
Page 161 Troubleshooting SiUS04-702 4.14.2 15/18/24 Class Remote Controller Display Method of A compressor startup failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal is sent.
Page 162: Dc Voltage / Current Sensor Abnormality
SiUS04-702 Troubleshooting 4.15 DC Voltage / Current Sensor Abnormality Remote Controller Display Method of Detecting abnormality of the DC sensor by the running frequency of compressor and by the input current multiplied DC voltage and current. Malfunction Detection Malfunction The compressor running frequency is below 52 Hz. (The input current is also below 0.5 A.) Decision If this error repeats 4 times, the system will be shut down.
Page 163: Ct Or Related Abnormality
Troubleshooting SiUS04-702 4.16 CT or Related Abnormality Remote Controller Display Method of A CT or related error is detected by checking the compressor running frequency and CT-detected input current. Malfunction Detection Malfunction The compressor running frequency is below 55 Hz and the CT input is below 0.1 V. (The input current is also below 1.25 A.) Decision If this error repeats 4 times, the system will be shut down.
Page 164 SiUS04-702 Troubleshooting 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.177 again. Get the system started. ∗...
Page 165: Thermistor Or Related Abnormality (Outdoor Unit)
Troubleshooting SiUS04-702 4.17 Thermistor or Related Abnormality (Outdoor Unit) P4, J3, J6, H9 Remote Controller Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. [A thermistor error is detected by checking the temperature.] Malfunction Detection Malfunction...
Page 166: Sius04
SiUS04-702 Troubleshooting 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.173 Turn on the power again. Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.
Page 167: Electrical Box Temperature Rise
Troubleshooting SiUS04-702 4.18 Electrical Box Temperature Rise Remote Controller Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Malfunction Detection Malfunction With the compressor off, the radiation fin temperature is above 176°F. Reset is made when the temperature drops below 158°F.
Page 168 SiUS04-702 Troubleshooting 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.173 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 176˚F and stops itself when it...
Page 169: Radiation Fin Temperature Rise
Troubleshooting SiUS04-702 4.19 Radiation Fin Temperature Rise Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on. Malfunction Detection Malfunction If the radiation fin temperature with the compressor on is above 194°F. If a radiation fin temperature rise takes place 4 times successively, the system will be shut Decision down.
Page 170 SiUS04-702 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Turn off the power and turn it on Refer to P.173 again to get the system started. Check No.07 Refer to P.174 Error displayed again?
Page 171: Output Over Current Detection
Troubleshooting SiUS04-702 4.20 Output Over Current Detection 4.20.1 09/12 Class Remote Controller 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. A speed error occurs while the compressor is running.
Page 172 SiUS04-702 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Check No.07 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.
Page 173 Troubleshooting SiUS04-702 4.20.2 15/18/24 Class Remote Controller 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. A speed error occurs while the compressor is running. Decision An output over-current input is fed from the output over-current detection circuit to the Conditions...
Page 174 SiUS04-702 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.174 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.
Page 175: Insufficient Gas
Troubleshooting SiUS04-702 4.21 Insufficient Gas 4.21.1 09/12 Class Remote Controller Display Method of Gas shortage detection I : A gas shortage is detected by checking the compressor running frequency. Malfunction Gas shortage detection II : A gas shortage is detected by checking the difference between indoor Detection unit heat exchanger temperature and room temperature as well as the difference between outdoor unit heat exchanger temperature and room temperature.
Page 176 SiUS04-702 Troubleshooting 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.170 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.06 * Room temperature thermistor * Outdoor air thermistor...
Page 177 Troubleshooting SiUS04-702 4.21.2 15/18/24 Class Remote Controller Display Method of Gas shortage detection I : A gas shortage is detected by checking the CT-detected input current value and the compressor running frequency. Malfunction Gas shortage detection II : A gas shortage is detected by checking the difference between indoor Detection unit heat exchanger temperature and room temperature as well as the difference between outdoor unit heat exchanger temperature and room temperature.
Page 178 SiUS04-702 Troubleshooting 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.170 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor Check No.06 * Outdoor air thermistor...
Page 179: Over-Voltage Detection
Troubleshooting SiUS04-702 4.22 Over-voltage Detection Remote Controller Display Method of An abnormal voltage rise is detected by checking the specified over-voltage detection circuit. Malfunction Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer (The voltage is over 400V).
Page 180: Low-Voltage Detection
SiUS04-702 Troubleshooting 4.23 Low-voltage Detection Remote Controller Display Method of An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage detection circuit. Malfunction Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer, or the voltage being detected by the DC voltage detection circuit is judged to be below 150 V for 0.1 Decision second.
Page 181: Check
Check SiUS04-702 5. Check How to Check 5.1.1 Fan Motor Connector Output Check Check No.01 1. Check connector connection. 2. Check motor power supply voltage output (pins 4-7). 3. Check motor control voltage (pins 4-3). 4. Check rotation command voltage output (pins 4-2). 5.
Page 182 SiUS04-702 Check 5.1.3 Four Way Valve Performance Check Check No.05 09/12 Class Turn off the power and turn it on again. ∗ Four way valve coil Cooling / dry : No continuity Start the heating-mode run. Heating : Continuity S80 voltage at DC 220-240 V with Replace the outdoor unit compressor on?
Page 183 Check SiUS04-702 15/18/24 Class Turn off the power and turn it on again. ∗ Four way valve coil Cooling / dry : No continuity Start the heating-mode run. Heating : Continuity S80 voltage at DC 220-240 V with Replace the outdoor unit compressor on? PCB.
Page 184 SiUS04-702 Check 5.1.4 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 185 Check SiUS04-702 5.1.5 Installation Condition Check Check No.07 Installation condition check Check the allowable Abnormal Change the position of the air dimensions of the air suction discharge grille or the and discharge area. installation location. Normal Does the discharged air from other outdoor Change the position of the air unit cause an increase of discharge grille or the...
Page 186 SiUS04-702 Check 5.1.7 Outdoor Unit Fan System Check Check No.09 Check the outdoor unit fan system. Fan motor lead wire Outdoor unit fan running? Reconnect. connector disconnected? Outdoor unit fan system Go to Check No. 15. functioning. (R2857) Service Diagnosis...
Page 187 Check SiUS04-702 5.1.8 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between pins 1 and 3 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 188 SiUS04-702 Check 5.1.10 Capacitor Voltage Check Check No.12 Before this checking, 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 189 Check SiUS04-702 5.1.12 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 you cannot avoid to touch a live part, make sure that there is no DC voltage using the tester. Check the continuity with the tester.
Page 190 SiUS04-702 Check 5.1.14 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.
Page 191 Check SiUS04-702 Service Diagnosis...
Page 192: Part 7 Removal Procedure
SiUS04-702 Part 7 Removal Procedure 1. FTXS09/12DVJU..................182 1.1 Removal of Air Filter................182 1.2 Removal of Front Grille ................185 1.3 Removal of Horizontal Blade and Vertical Blade........188 1.4 Removal of Electrical Box, PCB and Swing Motor ........190 1.5 Removal of Heat Exchanger ..............
Page 193: Ftxs09/12Dvju
FTXS09/12DVJU SiUS04-702 1. FTXS09/12DVJU Removal of Air Filter Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. External features If ON/OFF button is kept pushing for 5 seconds, a forced cooling operation will be carried out for approx.
Page 194 SiUS04-702 FTXS09/12DVJU Step Procedure Points Lift center section of air Left and right filters are filter and disengage interchangeable. hooks. To re-install, insert air filter Remove air filter by along the guide. pulling forward. 3. Opening and shutting front panel. Hook a finger onto the Support the front panel by one projection part provided...
Page 195 FTXS09/12DVJU SiUS04-702 Step Procedure Points Remove front panel from the unit. When restoring the air filter, make sure that the projection parts on the panel are in the guide groove, and then shut the panel. Removal Procedure...
Page 196: Removal Of Front Grille
SiUS04-702 FTXS09/12DVJU Removal of Front Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Opening and closing of service cover. Remove a service cover mounting screw. Open service cover upward.
Page 197 FTXS09/12DVJU SiUS04-702 Step Procedure Points 2. Removal of front grille assembly. Remove the 2 screws, Screw stoppers inside the in the right and the left, flap which were equipped in which fix the main body the existing models are not with the front grille.
Page 198 SiUS04-702 FTXS09/12DVJU Step Procedure Points The front grille can be When restoring the grille, removed in a manner to Make sure whether each pull out the upper part hook is set as it was. forward and lift up the lower part. Removal Procedure...
Page 199: Removal Of Horizontal Blade And Vertical Blade
FTXS09/12DVJU SiUS04-702 Removal of Horizontal Blade and Vertical Blade Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove horizontal blade. Lift horizontal blade to Screw stoppers inside the open position.
Page 200 SiUS04-702 FTXS09/12DVJU Step Procedure Points For restoring. 1. Since the key pattern hook is provided on the left side, insert the edge of the blade to the tip while rotating it. 2. Restore the 2 fixed parts of the horizontal blade onto the hook.
Page 201: Removal Of Electrical Box, Pcb And Swing Motor
FTXS09/12DVJU SiUS04-702 Removal of Electrical Box, PCB Swing Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove front grill. 1. Remove electrical box. Disconnect the connection wires.
Page 202 SiUS04-702 FTXS09/12DVJU Step Procedure Points Remove a screw on the The electrical box can be terminal board. removed instead of disengaging the terminal board. Remove a screw on the electrical box. Removal Procedure...
Page 203 FTXS09/12DVJU SiUS04-702 Step Procedure Points Pull up the electrical A hook is provided on the box forward to remove. behind. Removal Procedure...
Page 204 SiUS04-702 FTXS09/12DVJU Step Procedure Points 2. Removal of Remove the shelter. Disengage the front plate of the electrical box. Disengage the knobs by pushing the 2 hooks at the top and the bottom. Sliding to the left, the front part of the electrical box can be removed.
Page 205 FTXS09/12DVJU SiUS04-702 Step Procedure Points Disengage the four knobs on the back of the signal receiver PCB. Signal receiver PCB. Removal Procedure...
Page 206 SiUS04-702 FTXS09/12DVJU Step Procedure Points Control PCB. The control integrated with the power Glass tabu fuse 3.15A supply PCB. 250V (HA terminal) S7(Fan motor) S6(Swing motor) (Address) (Heat exchanger thermistor) (R2541) 3. Remove swing motor assembly. To remove swing motor assembly, remove 2 screws.
Page 207: Removal Of Heat Exchanger
FTXS09/12DVJU SiUS04-702 Removal of Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Conduct pump-down Warning operation. If gas leaks, repair the leak Remove the installation location, then connect all frame from the mounting refrigerant from the unit.
Page 208 SiUS04-702 FTXS09/12DVJU Step Procedure Points Disengage the hooks of the pipe retainer on the back. Pull auxiliary pipe Be careful to prevent pipe forward to an angle of deformation. 10 to 20 degrees. Removal Procedure...
Page 209 FTXS09/12DVJU SiUS04-702 Step Procedure Points Disengage hooks located right and left side, and pull heat exchanger forward. The hooks are symmetrically placed in the right and the left. Lifting the heat-exchanger slightly upward to the right, the left hook comes to be disengaged easily.
Page 210: Install Of Drain Plug
SiUS04-702 FTXS09/12DVJU Install of Drain Plug Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect drain hose. The drain pan is integrated with the bottom plate. Pull out the drain plug in the left on the drain pan by hand.
Page 211 FTXS09/12DVJU SiUS04-702 Step Procedure Points Push the drain plug into Push it into the inner part the right by Allen firmly. wrench. Removal Procedure...
Page 212: Removal Of Fan Rotor And Fan Motor
SiUS04-702 FTXS09/12DVJU Removal of Fan Rotor 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 heat exchanger. To remove right side plate, remove three screws.
Page 213 FTXS09/12DVJU SiUS04-702 Step Procedure Points Disengage hook. Loosen the hexagon head set screw on the fan rotor. Removal Procedure...
Page 214 SiUS04-702 FTXS09/12DVJU Step Procedure Points Remove the motor and fan rotor. Remove a screw on the left side plate. Removal Procedure...
Page 215 FTXS09/12DVJU SiUS04-702 Step Procedure Points Disengage a hook from the backward. Since the fan bearing is made of rubber, push it strongly off from the inside. The bearing can be removed just as the left side plate is attached with. Removal Procedure...
Page 216: Ftxs15/18/24Dvju
SiUS04-702 FTXS15/18/24DVJU 2. FTXS15/18/24DVJU Removal of the Air Filter Front Panel Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Features When the signal receiver catches a signal from the remote controller, it produces beep sound and the operation lamp blinks.
Page 217 FTXS15/18/24DVJU SiUS04-702 Step Procedure Points Lift an air filter upwards slightly by the center knob, and then pull it out downwards. The right and left filters are interchangeable. Insert the air filters along grooves when installing. Set the air filters with displaying “FRONT”...
Page 218 SiUS04-702 FTXS15/18/24DVJU Step Procedure Points 3. Remove an “air purifying filter with photocatalytic deodorizing function”. Push up the bottom of The right and left filters are an air purifying filter to interchangeable. undo the hooks (2 on lower, 3 on upper) and take the filter out.
Page 219 FTXS15/18/24DVJU SiUS04-702 Step Procedure Points 4. Remove the front panel. While opening the front panel further than it stops, release both axes and remove the front panel. Slide the front panel side to side to release each axis. Align the right and left axes with grooves in turn and insert them to the end when installing.
Page 220: Removal Of The Front Grille
SiUS04-702 FTXS15/18/24DVJU Removal of the Front Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the service cover. Loosen the screw and remove the service cover by the knob.
Page 221 FTXS15/18/24DVJU SiUS04-702 Step Procedure Points Undo the three hooks The front grille has three on the top of the front hooks on the center and the grille. both sides of the upper part. Refer to the removal procedure in a reverse way when reassembling.
Page 222 SiUS04-702 FTXS15/18/24DVJU Step Procedure Points Pull the upper part of Make sure that all the hooks the front grille out and are placed securely when lift the lower part up, reassembling. and then remove the front grille. Removal Procedure...
Page 223: Removal Of The Horizontal Blades / Vertical Blades
FTXS15/18/24DVJU SiUS04-702 Removal of the Horizontal Blades / Vertical Blades Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the horizontal blades. Open the horizontal It has no fixing screws inside blades.
Page 224 SiUS04-702 FTXS15/18/24DVJU Step Procedure Points Installation procedure 1. Since key pattern hook is provided, rotate the blades and fit it to the right pivot first. 2. Fit the blades to the center and left pivots. 2. Remove the vertical blades. Undo the right and left pivots.
Page 225 FTXS15/18/24DVJU SiUS04-702 Step Procedure Points Pull the vertical blades rightwards and remove Removal Procedure...
Page 226: Removal Of The Electrical Box / Pcb / Swing Motor
SiUS04-702 FTXS15/18/24DVJU Removal of the Electrical Box / PCB / Swing Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the front grille. Parts layout 2.
Page 227 FTXS15/18/24DVJU SiUS04-702 Step Procedure Points 3. Disconnect the indoor heat exchanger thermistor and the earth. Mind that not to lose the clip for the thermistor. 4. Remove the electrical box. Disconnect the 4 You can remove the connection wirings. electrical box without Loosen the screw and detaching the terminal strip...
Page 228 SiUS04-702 FTXS15/18/24DVJU Step Procedure Points Disconnect the connectors for swing motor (S6, S8). Loosen the fixing screw of the electrical box. Dislocate the electrical The electrical box has a box to the left and undo hook on its back. the back hook. Removal Procedure...
Page 229 FTXS15/18/24DVJU SiUS04-702 Step Procedure Points Pull the electrical box Hook the back hook of the out towards you. electrical box when reassembling. Loosen the screw on Screw: M4×16 the electrical box. Push the shelter up and undo the hook. Removal Procedure...
Page 230 SiUS04-702 FTXS15/18/24DVJU Step Procedure Points Press the receiver units Release the hooks on the down and release the upper side. hooks on the upper side, and then undo the hooks on the lower side. Cut the clamp. The receiver units Remove the receiver units contain four PCBs.
Page 231 FTXS15/18/24DVJU SiUS04-702 Step Procedure Points Cut the clamp. Clamps should be always available. Fix it as it was before. 5. Remove the control PCB. Undo the 2 hooks on the lower side, and then the 2 hooks on the upper side. Remove the control PCB.
Page 232 SiUS04-702 FTXS15/18/24DVJU Step Procedure Points 6. Remove the swing motor for horizontal blades. Remove the screw of the swing motor. 7. Remove the swing motor for vertical blades. Release the swing axis Releasing the swing axis on the right side. Removal Procedure...
Page 233 FTXS15/18/24DVJU SiUS04-702 Step Procedure Points Loosen the 2 screws and detach the swing motor assembly. Loosen the 2 screws Six hooks hold the and remove the swing assembly. motor. Removal Procedure...
Page 234: Removal Of The Heat Exchanger
SiUS04-702 FTXS15/18/24DVJU Removal of the Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the electrical Caution box. If gas leaks, repair the spot of 1.
Page 235 FTXS15/18/24DVJU SiUS04-702 Step Procedure Points Unscrew the flare nut liquid piping by 2 wrenches. 2. Remove the indoor unit. Detach the indoor unit from the installation plate. 3. Remove the piping fixture. Release the hook on the upper side of the piping fixture on the back of the unit.
Page 236 SiUS04-702 FTXS15/18/24DVJU Step Procedure Points Release the hooks on the left side. Push the fixing hooks on the right side and release. Pull the heat exchanger Caution to the front side and When removing or undo the hooks reinstalling heat exchanger, completely, and then lift be sure to wear protective gloves or wrap the heat...
Page 237: Removal Of The Fan Rotor / Fan Motor
FTXS15/18/24DVJU SiUS04-702 Removal of the Fan Rotor / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side panel. Loosen the 2 screws. You can remove the fan rotor without detaching the right side panel.
Page 238 SiUS04-702 FTXS15/18/24DVJU Step Procedure Points Loosen the fixing screw of the fan rotor. 3. Remove the fan motor. Remove the motor. Reassembling the fan motor (1) When reassembling the fan rotor, provide as much as 3/16inch of play between the side face of the rotor and the bottom frame.
Page 239 FTXS15/18/24DVJU SiUS04-702 Step Procedure Points Loosen the 2 screws and remove the mounting plate for the bearing. The bearing is made of rubber. Push it inwards firmly and remove it. Removal Procedure...
Page 240: Rx09/12Fvju
SiUS04-702 RX09/12FVJU 3. RX09/12FVJU Removal of Panels Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Features Take care not to cut your finger by the fins of the heat exchanger.
Page 241 RX09/12FVJU SiUS04-702 Step Procedure Points The stop valve cover is united with the shelter. When reassembling, make sure to fit the 5 hooks. 2. Remove the panels. Loosen the 3 screws (front, right, left) and lift the top panel. Remove the drip proof plate.
Page 242 SiUS04-702 RX09/12FVJU Step Procedure Points Disconnect the The fan motor is united with connector for fan motor the front panel. (S70). Loosen the 5 screws of the front panel. Undo the hooks. The front panel has 4 hooks. Pull and remove the The fan motor is united with front panel.
Page 243 RX09/12FVJU SiUS04-702 Step Procedure Points 3. Remove the fan motor. The screw has reverse winding. Unscrew the washer- fitted nut (M10) of the propeller fan with a spanner. Remove the propeller Align mark of the propeller fan. fan with D-cut section of the motor shaft when reassembling.
Page 244 SiUS04-702 RX09/12FVJU Step Procedure Points Loosen the 2 screws and lift the bell mouth undo the hooks. Remove the bell mouth. Loosen the fixing hooks Put the lead wire through the and release the lead back of the motor when wire.
Page 245 RX09/12FVJU SiUS04-702 Step Procedure Points Loosen the 4 screws to M4×16 remove the motor. DC fan motor Loosen the 2 screws to remove the fan motor fixing frame. Removal Procedure...
Page 246 SiUS04-702 RX09/12FVJU Step Procedure Points 4. Remove the right side panel. Loosen the 2 screws on the rear side. Loosen the 3 screws on the right side. Loosen the screw and lift the connection port to remove. Removal Procedure...
Page 247 RX09/12FVJU SiUS04-702 Step Procedure Points When reassembling, make sure to fit the hook. Removal Procedure...
Page 248: Removal Of Electrical Box
SiUS04-702 RX09/12FVJU 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 Remove the top panel. Disconnect the connector for fan motor. 1. Remove the electrical box.
Page 249 RX09/12FVJU SiUS04-702 Step Procedure Points Release the discharge Pay attention so as not to pipe thermistor. lose the clip for thermistor. Release the heat Pay attention so as not to exchanger thermistor. lose the clip. Lift and remove the electrical box. Removal Procedure...
Page 250: Removal Of Reactor And Partition Plate
SiUS04-702 RX09/12FVJU Removal of Reactor Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. Remove the electrical box. 1. Remove the reactor. Loosen the screw.
Page 251 RX09/12FVJU SiUS04-702 Step Procedure Points 2. Remove the partition plate. Loosen the 2 screws. The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. When reassembling, fit the lower hook into the bottom frame.
Page 252: Removal Of Sound Blanket
SiUS04-702 RX09/12FVJU 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 Remove the outer panels. Remove the electrical box. 1. Remove the sound blanket.
Page 253 RX09/12FVJU SiUS04-702 Step Procedure Points Lift and remove the sound blanket (top). Pull the sound blanket Since the piping ports on the (inner) out. sound blanket are torn easily, remove the blanket carefully. Removal Procedure...
Page 254 SiUS04-702 RX09/12FVJU Step Procedure Points Pull the sound blanket (bottom) out. Removal Procedure...
Page 255: Removal Of Four Way Valve
RX09/12FVJU SiUS04-702 Removal of Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the peripheries. Remove the four way valve and the sheets of putty so as not to burn them.
Page 256 SiUS04-702 RX09/12FVJU Step Procedure Points Remove the sheets of putty. Cut the pipe with a tube cutter. Heat up the brazed part Provide a protective sheet or and withdraw the piping a steel plate so that the with pliers. brazing flame cannot influence peripheries.
Page 257: Removal Of Compressor
RX09/12FVJU SiUS04-702 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 1. Remove the compressor. Warning Unscrew the nut of the Ventilate when refrigerant compressor.
Page 258 SiUS04-702 RX09/12FVJU Step Procedure Points Heat up the brazed part In case of the difficulty with of the discharge side gas brazing machine and disconnect. 1. Disconnect the brazed part where is easy to disconnect and restore. 2. Cut pipes on the main unit by a miniature copper tube cutter in order to make it easy to disconnect.
Page 259 RX09/12FVJU SiUS04-702 Step Procedure Points Lift the compressor up and remove it. Removal Procedure...
Page 260: Removal Of Pcb
SiUS04-702 RX09/12FVJU Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the PCB. You can remove the PCB when you disconnect the Feature of the PCB read wires on the terminal board without removing the electrical box.
Page 261 RX09/12FVJU SiUS04-702 Step Procedure Points Release the earth terminal. Loosen the 4 screws. Undo the 3 hooks on the upper side. Removal Procedure...
Page 262 SiUS04-702 RX09/12FVJU Step Procedure Points Lift and pull out the PCB. Feature of the PCB See page 13 for detail. LED A S90 S70: fan motor S80: four way valve S90: thermistor (outdoor air, heat exchanger, discharge pipe) (3.15A) FU1(3.15A) (R6977) Removal Procedure...
Page 263: Rx15/18/24Fvju
RX15/18/24FVJU SiUS04-702 4. RX15/18/24FVJU Removal of the Panels Plates Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the panels and plates. Loosen the 4 screws and lift the panel.
Page 264 SiUS04-702 RX15/18/24FVJU Step Procedure Points Loosen the 4 screws and remove the discharge grille. The front grille has 4 hooks. Slide the discharge grille upwards and remove it. Loosen the 6 screws of front panel. Removal Procedure...
Page 265 RX15/18/24FVJU SiUS04-702 Step Procedure Points Push the front panel and undo the hook. Lift the clamp plate remove it. Undo the right side Lift the front panel and hook, and then the left remove it while pushing the side hooks. right side panel inwards.
Page 266 SiUS04-702 RX15/18/24FVJU Step Procedure Points Lift the front panel and undo the left side hooks. Fit the left side of the front panel first when installing. 2. Remove the stop valve cover. Loosen the screw of the stop valve cover. Removal Procedure...
Page 267 RX15/18/24FVJU SiUS04-702 Step Procedure Points Pull down the stop valve cover to undo the hooks and remove it. The stop valve cover has 6 hooks. (R2687) Removal Procedure...
Page 268: Removal Of The Fan Motor / Propeller Fan
SiUS04-702 RX15/18/24FVJU Removal of the Fan Motor / Propeller Fan Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the top panel and the front panel. Shelter 1.
Page 269 RX15/18/24FVJU SiUS04-702 Step Procedure Points 2. Remove the fan motor. Disconnect the connector for fan motor (S70). The illustration shows arrangement of the fan motor lead wire. Removal Procedure...
Page 270 SiUS04-702 RX15/18/24FVJU Step Procedure Points Unscrew the washer- fitted nut (M10) of the propeller fan with a spanner. Align mark of the propeller fan with D-cut section of the motor shaft when reassembling. Remove the 4 screws from the motor. Removal Procedure...
Page 271 RX15/18/24FVJU SiUS04-702 Step Procedure Points Pull the fan motor out. Put the lead wire through the back of the motor when reassembling. (so as not to be entangled with the propeller fan) (R2697) Removal Procedure...
Page 272: Removal Of The Pcb / Electrical Box
SiUS04-702 RX15/18/24FVJU 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 top panel and the front panel. 1. Remove the right side Terminal strip number panel.
Page 273 RX15/18/24FVJU SiUS04-702 Step Procedure Points Loosen the fixing screw of the electrical box. Insert the two hooks of the lower part and the one hook of the upper back when Hook reassembling. (R5485) Hooks (R5486) Removal Procedure...
Page 274 SiUS04-702 RX15/18/24FVJU Step Procedure Points 2. Disconnect harnesses. Loosen the fixing screw Service monitor PCB of the cable way board. LED A (Green) LEDA(Green) A B C (Initial setting: OFF) (R2704) Push the hook up to release the cable way board.
Page 275 RX15/18/24FVJU SiUS04-702 Step Procedure Points Disconnect the connectors of the front side. S20: electronic expansion valve S40: overload protector S80: four way valve S90: thermistors (discharge pipe, outdoor air, heat exchanger) Loosen the screw of the control PCB. Undo the 2 hooks and release the control PCB from the ditch of the front side.
Page 276 SiUS04-702 RX15/18/24FVJU Step Procedure Points Disconnect the harnesses while opening the control PCB. S10: to the terminal strip AC2: to the terminal strip Disconnect the connectors. S51: to the service monitor PCB S101: to the service monitor PCB Disconnect the connectors.
Page 277 RX15/18/24FVJU SiUS04-702 Step Procedure Points Control PCB (outdoor unit) S10: to the terminal strip S20: electronic expansion valve S31: to CN14 of the S32: to CN11 of the S33: to of the MID S40: overload protector S51: to of the service monitor PCB S71: to of the MID...
Page 278 SiUS04-702 RX15/18/24FVJU Step Procedure Points Release the clamp by pliers. (R2715) Disconnect the reactor harness. Removal Procedure...
Page 279 RX15/18/24FVJU SiUS04-702 Step Procedure Points Pull the clamp and draw the thermistor harness out from the back of the electrical box. Loosen the screw of the electrical box. Removal Procedure...
Page 280 SiUS04-702 RX15/18/24FVJU Step Procedure Points Release the clamp of the four way valve harness. (R2720) Lift the electrical box and remove it. Removal Procedure...
Page 281: Removal Of The Reactor
RX15/18/24FVJU SiUS04-702 Removal of the Reactor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the electrical box. 1. Remove the partition plate. Release the clamp by pliers.
Page 282 SiUS04-702 RX15/18/24FVJU Step Procedure Points Lift the partition plate and remove it. Loosen the screw. Slide the reactor remove it from the partition plate. Removal Procedure...
Page 283: Removal Of The Sound Blanket
RX15/18/24FVJU SiUS04-702 Removal of the Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the harness of each thermistor. Release the discharge Pay attention to the direction pipe thermistor.
Page 284 SiUS04-702 RX15/18/24FVJU Step Procedure Points Cut the clamp by Clamps should be always nippers. available. Disconnect the outdoor Fix it as it was before. heat exchanger thermistor. Remove the sound Since the piping ports on the blanket (side-outer). sound blanket (side-outer) are torn easily, remove the blanket carefully.
Page 285 RX15/18/24FVJU SiUS04-702 Step Procedure Points Remove the sound blanket (top-lower). Remove the sound Since the piping ports on the blanket (side-inner). sound blanket (side-inner) are torn easily, remove the blanket carefully. Removal Procedure...
Page 286: Removal Of The Four Way Valve
SiUS04-702 RX15/18/24FVJU Removal of the Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Loosen the screw of the Provide a protective sheet or four way valve coil.
Page 287: Removal Of The Electronic Expansion Valve
RX15/18/24FVJU SiUS04-702 Removal of the Electronic Expansion Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the electronic expansion valve coil. Remove the sheets of putty.
Page 288: Removal Of The Compressor
SiUS04-702 RX15/18/24FVJU Removal of the 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 lead Be careful so as not to burn wires of the the compressor terminals or compressor.
Page 289 RX15/18/24FVJU SiUS04-702 Step Procedure Points Unscrew the nut of the compressor. Remove the putty of the accumulator. Before working, Warning make sure that the Ventilate when refrigerant refrigerant is empty leaks during the work. in the circuit. (If refrigerant contacts fire, it Be sure to apply will cause to arise toxic gas.) nitrogen...
Page 290 SiUS04-702 Part 8 Others 1. Others ....................280 1.1 Test Run from the Remote Controller ............. 280 1.2 Jumper Settings ..................281 Others...
Page 291: Part 8 Others
Others SiUS04-702 1. Others Test Run from the Remote Controller For Heat pump In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable temperature. Trial operation may be disabled in either mode depending on the room temperature. After trial operation is complete, set the temperature to a normal level.
Page 292: Jumper Settings
SiUS04-702 Others Jumper Settings 1.2.1 When Two Units are Installed in One Room When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. How to set the different addresses Control PCB of the indoor unit (1) Remove the front grille.
Page 293 Others SiUS04-702 Others...
Page 294: Part 9 Appendix
SiUS04-702 Part 9 Appendix 1. Piping Diagrams..................284 1.1 Indoor Units ..................... 284 1.2 Outdoor Units ..................285 2. Wiring Diagrams..................287 2.1 Indoor Units ..................... 287 2.2 Outdoor Units ..................288 Appendix...
Page 295: Piping Diagrams
Piping Diagrams SiUS04-702 1. Piping Diagrams Indoor Units FTXS09/12DVJU FTXS15/18/24DVJU INDOOR UNIT INDOOR UNIT HEAT EXCHANGER 9/32CuT ( 5/16CuT ) 1/4CuT THERMISTOR 1/4CuT HEAT EXCHANGER ON HEAT EXCH. 1/4CuT THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING CROSS FLOW FAN ( 1/4CuT ) FIELD PIPING ( 1/4CuT )
Page 296: Outdoor Units
SiUS04-702 Piping Diagrams Outdoor Units RX09FVJU OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 9/32CuT 9/32CuT HEAT EXCHANGER THERMISTOR MOTOR OPERATED VALVE 9/32CuT 1/4CuT 1/4CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 3/8CuT FOUR WAY VALVE FIELD PIPING ON:HEATING ( 1/4CuT ) LIQUID STOP VALVE MUFFLER...
Page 297 Piping Diagrams SiUS04-702 RX15/18FVJU OUTDOOR UNIT HEAT EXCHANGER OUTDOOR AIR TEMPERATURE THERMISTOR 5/16CuT 5/16CuT 5/16CuT 1/2CuT 5/16CuT CAPILLARY TUBE 1 5/16CuT MUFFLER 5/16CuT WITH 5/16CuT 5/16CuT REFRIGERANT FLOW FILTER CAPILLARY TUBE 2 1/4CuT 5/16CuT COOLING CAPILLARY TUBE 3 5/16CuT HEATING HEAT 5/16CuT EXCHANGER...
Page 298: Wiring Diagrams
SiUS04-702 Wiring Diagrams 2. Wiring Diagrams Indoor Units FTXS09/12DVJU PCB3 S36 S35 PCB1 → INTELLIGENT- EYE SENSOR 3.15A outdoor TERMINAL FOR PCB2 CENTRALIZED CONTROL FIELD WIRING. TRANSMISSION LED1 LED2 LED3 CIRCUIT CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF SIGNAL THE MAIN POWER SUPPLY IS t°...
Page 299: Outdoor Units
Wiring Diagrams SiUS04-702 Outdoor Units RX09/12FVJU C100 FIELD WIRING. PCB1 MRM20 IPM1 TO INDOOR UNIT MRM10 3.15A IC11 3.15A POWER SUPPLY PCB2 60Hz 208/230V~ MRCW outdoor NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. t° t° t° C74, C75 IN CASE OF HEAT PUMP C94, C95, C100...
Page 300: Index
SiUS04-702 Index Numerics thermistor resistance check ......173 turning speed pulse input on the 00 ................122 outdoor unit PCB check ....... 178 3 minutes stand-by ............. 50 check No.01 ..............170 3-D airflow ..............21 check No.04 ..............170 3-minutes standby ..........32, 38 check No.05 ..............171 check No.06 ..............173 check No.07 ..............174...
Page 301 SiUS04-702 drain ................. 223 fan motor, connector .........190, 231 drain hose ............196, 199 fan rotor ............201, 227 drain plug ..............199 fan speed control ............22 drip proof plate ..........215, 230 fan speed setting ..........8, 10, 281 filter air filter .............. 182 E .................
Page 302 SiUS04-702 HOME LEAVE operation ..........29 horizontal blade ..........188, 212 OL activation .............132 hot start function ............31 ON/OFF button on indoor unit ........31 operation lamp ............116 outdoor air temperature thermistor ......155 indoor heat exchanger thermistor ......33 outdoor heat exchanger thermistor ......33 indoor unit PCB abnormality ........
Page 303 SiUS04-702 S6 ............8, 10, 190, 217 S7 .................8, 190 radiation fin temperature rise ........158 S70 ............12, 14, 231, 258 radiation fin thermistor ..........155 S71 .............14, 265, 266 reactor .............. 239, 271 S72 ..............14, 266 reactor harnesses ............ 237 S8 ...............10, 217 receiver units ............
Page 304 SiUS04-702 U0 ..............164, 166 U2 ..............168, 169 U4 ................130 V1 ..............8, 10, 12 V2 ................12 V3 ................. 12, 14 varistor ............8, 10, 12, 14 vertical blade ............ 189, 213 voltage detection function ........46, 60 wide-angle louvres .............
Page 305 SiUS04-702 Index...
Page 306 SiUS04-702 Drawings & Flow Charts ARC433B ..............119 indoor unit PCB abnormality ........123 automatic air flow control ...........22 input current control ..........39 automatic operation ...........24 input over current detection ........136 auto-swing ..............21 installation condition check ........174 insufficient gas ............164 insufficient gas control .........
Page 307 SiUS04-702 radiation fin temperature rise ........158 remote controller ............119 service check function ..........119 service monitor PCB ..........15 signal receiver PCB ..........9 signal transmission error (between indoor and outdoor units) ....130 SPM ................16 target discharge pipe temperature control ..44 thermistor or related abnormality (indoor unit) ..129 thermistor or related abnormality (outdoor unit) ..154 thermistor resistance check ........173...
Page 308 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 March 2007 but subject to change without notice. SiUS04-702 Printed in U.S.A. 03/2007 B AK...

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Daikin FTXS09DVJU Service Manual

Part 1 List of Functions

Part 2 Specifications

Part 3 Printed Circuit Board Connector Wiring Diagram

Part 4 Function and Control

Part 5 Operation Manual

Part 6 Service Diagnosis

Part 7 Removal Procedure

Part 8 Others

Part 9 Appendix

Index

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