Daikin FTXS30LVJU Service Manual
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Daikin FTXS30LVJU Service Manual

Inverter pair ftxs-l series fdxs-l series
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See also: Operating Manual , Engineering Data
Service
Manual
Inverter Pair
FTXS-L Series
FDXS-L Series
[Applied Models]
 Inverter Pair : Cooling Only
 Inverter Pair : Heat Pump
SiUS091133

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Summary of Contents for Daikin FTXS30LVJU

  • Page 1 SiUS091133 Service Manual Inverter Pair FTXS-L Series FDXS-L Series [Applied Models]  Inverter Pair : Cooling Only  Inverter Pair : Heat Pump...
  • Page 2 SiUS091133 Inverter Pair FTXS-L Series FDXS-L Series Cooling Only Indoor Unit FTXS30LVJU FTXS36LVJU Outdoor Unit RKS30LVJU RKS36LVJU Heat Pump Indoor Unit FTXS09LVJU FDXS09LVJU FTXS12LVJU FDXS12LVJU FTXS15LVJU FTXS18LVJU FTXS24LVJU FTXS30LVJU FTXS36LVJU Outdoor Unit RXS09LVJU RXS12LVJU RXS15LVJU RXS18LVJU RXS24LVJU RXS30LVJU RXS36LVJU Table of Contents...

  • Page 3: Table Of Contents

    SiUS091133 1. Safety Considerations .................. i 1.1 Safety Considerations for Repair ..............i 1.2 Safety Considerations for Users..............ii Part 1 List of Functions ..............1 1. Functions.....................2 1.1 FTXS Series ....................2 1.2 FDXS Series....................4 Part 2 Specifications ............... 5 1.
  • Page 4 SiUS091133 1.12 Other Functions..................40 2. Function of Thermistor ................41 3. Control Specification .................42 3.1 Mode Hierarchy ..................42 3.2 Frequency Control..................43 3.3 Controls at Mode Changing / Start-up............45 3.4 Discharge Pipe Temperature Control............46 3.5 Input Current Control.................. 47 3.6 Freeze-up Protection Control ..............
  • Page 5 SiUS091133 2. Problem Symptoms and Measures ............90 3. Service Check Function ................91 4. Troubleshooting ..................94 4.1 Error Codes and Description ..............94 4.2 Indoor Unit PCB Abnormality ..............95 4.3 Freeze-up Protection Control or Heating Peak-cut Control......97 4.4 Fan Motor or Related Abnormality ............. 99 4.5 Thermistor or Related Abnormality (Indoor Unit)........
  • Page 6 SiUS091133 Part 7 Removal Procedure ............155 1. Indoor Unit: FTXS09/12LVJU..............157 1.1 Removal of Air Filters ................157 1.2 Removal of Front Panel................159 1.3 Removal of Front Grille ................160 1.4 Removal of Horizontal Blades / Vertical Blades ........162 1.5 Removal of Electrical Box ................
  • Page 7 SiUS091133 5.7 Removal of Electronic Expansion Valve........... 321 5.8 Removal of Compressor................323 6. Outdoor Unit: RXS24LVJU..............326 6.1 Removal of Outer Panels ................. 326 6.2 Removal of Electrical Box ................ 340 6.3 Removal of PCBs ..................344 6.4 Removal of Fan Motor................347 6.5 Removal of Coils / Thermistors ..............
  • Page 8 SiUS091133 Table of Contents...

  • Page 9: Safety Considerations

    Safety Considerations SiUS091133 1. Safety Considerations Read these SAFETY CONSIDERATIONS carefully before performing any repair work. Comply with these safety symbols without fail.Meanings of DANGER, WARNING, CAUTION, and NOTE Symbols: DANGER ....Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING ....

  • Page 10: Safety Considerations For Users

    SiUS091133 Safety Considerations • Do not repair the electrical components with wet hands. Working on the equipment with wet hands may cause an electrical shock. • Do not clean the air conditioner by splashing water on it. Washing the unit with water may cause an electrical shock. •...

  • Page 11: List Of Functions

    SiUS091133 Part 1 List of Functions 1. Functions.....................2 1.1 FTXS Series ....................2 1.2 FDXS Series....................4 List of Functions...

  • Page 12: Functions

    SiUS091133 Functions 1. Functions FTXS Series Category Functions Category Functions   Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean 14 ~ 14 ~ Operation Limit for Cooling (°FDB) Photocatalytic Deodorizing Filter — — 114.8 114.8 Air-Purifying Filter with Photocatalytic...
  • Page 13 Functions SiUS091133 Category Functions Category Functions   Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean 14 ~ 14 ~  Operation Limit for Cooling (°FDB) Photocatalytic Deodorizing Filter — — 114.8 114.8 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°FWB) —...

  • Page 14: Fdxs Series

    SiUS091133 Functions FDXS Series Category Functions Category Functions  Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — Function Clean 14 ~ Operation Limit for Cooling (°FDB) Photocatalytic Deodorizing Filter — 114.8 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°FWB) —...

  • Page 15: Specifications

    SiUS091133 Part 2 Specifications 1. Specifications ....................6 1.1 FTXS Series ....................6 1.2 FDXS Series....................11 Specifications...

  • Page 16: Specifications

    SiUS091133 Specifications 1. Specifications FTXS Series 208 - 230 V Indoor Unit FTXS09LVJU FTXS12LVJU Model RXS09LVJU RXS12LVJU Outdoor Unit Cooling Heating Cooling Heating 2.64 (1.3 ~ 2.64) 3.52 (1.3 ~ 3.52) 3.52 (1.4 ~ 3.52) 4.22 (1.4 ~ 4.22) Capacity Btu/h 9,000 (4,400 ~ 9,000) 12,000 (4,400 ~ 12,000)
  • Page 17 Specifications SiUS091133 60 Hz, 208 - 230 V Indoor Unit FTXS15LVJU FTXS18LVJU Model RXS15LVJU RXS18LVJU Outdoor Unit Cooling Heating Cooling Heating 4.4 (1.7 ~ 4.4) 5.28 (1.7 ~ 5.28) 5.28 (1.7 ~ 5.28) 6.33 (1.7 ~ 6.33) Capacity Btu/h 15,000 (5,800 ~ 15,000) 18,000 (5,800 ~ 18,000) 18,000 (5,800 ~ 18,000) 21,600 (5,800 ~ 21,600)
  • Page 18 SiUS091133 Specifications 60 Hz, 208 - 230 V Indoor Unit FTXS24LVJU Model RXS24LVJU Outdoor Unit Cooling Heating 6.30 (2.3 ~ 6.30) 7.44 (2.3 ~ 7.44) Capacity Btu/h 21,500 (7,800 ~ 21,500) 25,400 (7,800 ~ 25,400) Rated (Min.~Max.) kcal/h 5,400 (1,980 ~ 5,420) 6,400 (1,980 ~ 6,400) Moisture Removal gal/h (L/h)
  • Page 19 Specifications SiUS091133 208 - 230 V Indoor Unit FTXS30LVJU FTXS36LVJU Model Outdoor Unit RKS30LVJU RKS36LVJU 8.8 (3.0 ~ 8.8) 10.2 - 10.5 (3.0 ~ 10.2 - 10.5) Capacity Btu/h 30,000 (10,200 ~ 30,000) 35,000 - 36,000 (10,200 ~ 35,000 - 36,000) Rated (Min.
  • Page 20 SiUS091133 Specifications 208 - 230 V Indoor Unit FTXS30LVJU FTXS36LVJU Model RXS30LVJU RXS36LVJU Outdoor Unit Cooling Heating Cooling Heating 8.8 (3.0 ~ 8.8) 10.2 (3.0 ~ 10.2) 10.2 - 10.5 (3.0 ~ 10.2 - 10.5) 10.5 - 11.1 (3.0 ~ 10.5 - 11.1)

  • Page 21: Fdxs Series

    Specifications SiUS091133 FDXS Series 60 Hz, 208 - 230 V Indoor Unit FDXS09LVJU FDXS12LVJU Model RXS09LVJU RXS12LVJU Outdoor Unit Cooling Heating Cooling Heating 2.49 (1.30 ~ 2.49) 2.93 (1.30 ~ 2.93) 3.37 (1.40 ~ 3.37) 3.37 (1.40 ~ 3.37) Capacity Btu/h 8,500 (4,400 ~ 8,500) 10,000 (4,400 ~ 10,000)

  • Page 22: Printed Circuit Board Connector Wiring Diagram

    SiUS091133 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................13 1.1 FTXS09/12LVJU ..................13 1.2 FTXS15/18/24/30/36LVJU ................. 16 1.3 FDXS09/12LVJU ..................19 2. Outdoor Unit....................21 2.1 RXS09/12LVJU ..................21 2.2 RXS15/18LVJU ..................23 2.3 RXS24LVJU, RK(X)S30/36LVJU ............... 25 Printed Circuit Board Connector Wiring Diagram...

  • Page 23: Indoor Unit

    Indoor Unit SiUS091133 1. Indoor Unit FTXS09/12LVJU Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for DC fan motor 2) S21 Connector for centralized control (HA) 3) S25 Connector for INTELLIGENT EYE sensor PCB 4) S32 Indoor heat exchanger thermistor 5) S41 Connector for swing motors 6) S46...
  • Page 24 SiUS091133 Indoor Unit PCB Detail PCB (1): Control PCB LED A 2P206687-4 Printed Circuit Board Connector Wiring Diagram...
  • Page 25 Indoor Unit SiUS091133 PCB (2): Signal Receiver PCB 3P210728-1 PCB (3): Display PCB RTH1 LED3 LED2 LED1 3P210728-1 PCB (4): INTELLIGENT EYE Sensor PCB 3EB86013-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 26: Ftxs15/18/24/30/36Lvju

    SiUS091133 Indoor Unit FTXS15/18/24/30/36LVJU Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for DC fan motor 2) S21 Connector for centralized control (HA) 3) S25 Connector for INTELLIGENT EYE sensor PCB 4) S32 Indoor heat exchanger thermistor 5) S41 Connector for swing motors 6) S46...
  • Page 27 Indoor Unit SiUS091133 PCB Detail PCB (1): Control PCB (3.15A) LED A 2P227881-5 2P227881-6 Printed Circuit Board Connector Wiring Diagram...
  • Page 28 SiUS091133 Indoor Unit PCB (2): Signal Receiver PCB 3P224121-1 PCB (3): Display PCB RTH1 LED3 LED2 LED1 3P224121-1 PCB (4): INTELLIGENT EYE Sensor PCB 3P227885-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 29: Fdxs09/12Lvju

    Indoor Unit SiUS091133 FDXS09/12LVJU Connectors and A1P: Control PCB Other Parts 1) S1 Connector for AC fan motor 2) S7 Connector for AC fan motor (Hall IC) 3) S21 Connector for centralized control (HA) 4) S26 Connector for display PCB 5) S32 Connector for indoor heat exchanger thermistor 6) H1, H2, H3...
  • Page 30 SiUS091133 Indoor Unit PCB Detail A1P: Control PCB LED A 2P292535-1 A2P: Display PCB LED3 LED2 RTH1 2P084375-1 LED 1 does not function. Printed Circuit Board Connector Wiring Diagram...

  • Page 31: Outdoor Unit

    Outdoor Unit SiUS091133 2. Outdoor Unit RXS09/12LVJU Connectors and PCB (1): Filter PCB Other Parts 1) S11 Connector for main PCB 2) AC1, AC2, S Connector for terminal board 3) E1, E2 Terminal for ground wire 4) HL2, HN2 Connector for main PCB 5) HR1 Connector for reactor 6) FU1...
  • Page 32 SiUS091133 Outdoor Unit PCB Detail PCB (1): Filter PCB E1, E2 3P254234-7 PCB (2): Main PCB U VW LED A 2P290759-2 FU2 S100 PCB (3): Forced Operation Button PCB S110 3P255755-2 Printed Circuit Board Connector Wiring Diagram...

  • Page 33: Rxs15/18Lvju

    Outdoor Unit SiUS091133 RXS15/18LVJU Connectors and PCB (1): Filter PCB Other Parts 1) S11 Connector for [S10] on main PCB 2) HL1, HN1, S Connector for terminal board 3) E1, E2 Terminal for ground wire 4) HL2, HN2 Connector for [HL3] [HN3] on main PCB 5) HL4, HN4 Connector for [S12] on main PCB 6) FU1...
  • Page 34 SiUS091133 Outdoor Unit PCB Detail PCB (1): Filter PCB FU3 V2 HN4, HL4 HN2 HL2 E2, E1 3P273862-3 PCB (2): Main PCB LED A U, V, W 2P273854-5 Printed Circuit Board Connector Wiring Diagram...

  • Page 35: Rxs24Lvju, Rk(X)S30/36Lvju

    Outdoor Unit SiUS091133 RXS24LVJU, RK(X)S30/36LVJU Connectors and PCB (1): Main PCB Other Parts 1) S10 Connector for terminal board (indoor - outdoor transmission) 2) S20 Connector for electronic expansion valve coil 3) S40 Connector for overload protector 4) S51, S101 Connector for service monitor PCB 5) S70 Connector for fan motor...
  • Page 36 SiUS091133 Outdoor Unit PCB Detail PCB (1): Main PCB E1 E2 FU2 V100 S101 2P266264-5 2P266264-6 PCB (2): Service Monitor PCB LED A S102 SW4-B 3P169059-1  SW4-A and SW4-C has no function and keep it off. Printed Circuit Board Connector Wiring Diagram...

  • Page 37: Function And Control

    SiUS091133 Part 4 Function and Control 1. Main Functions..................28 1.1 Temperature Control .................. 28 1.2 Frequency Principle..................28 1.3 Airflow Direction Control (FTXS Series) ............. 30 1.4 Fan Speed Control for Indoor Unit ............. 32 1.5 Program Dry Operation ................33 1.6 Automatic Operation...................

  • Page 38: Main Functions

    SiUS091133 Main Functions 1. Main Functions Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures  Room temperature: temperature of lower part of the room  Set temperature: temperature set by remote controller  Room thermistor temperature: temperature detected by room temperature thermistor ...
  • Page 39 Main Functions SiUS091133 Inverter Principle To regulate the capacity, a frequency control is needed. The inverter makes it possible to alter the rotation speed of the compressor. The following table explains the conversion principle: Phase Description The supplied AC power source is converted into the DC power source for the present. The DC power source is reconverted into the three phase AC power source with variable frequency.

  • Page 40: Airflow Direction Control (Ftxs Series)

    SiUS091133 Main Functions Frequency Limits The following functions regulate the minimum and maximum frequency: Frequency Functions  Four-way valve operation compensation. Refer to page 45.  Compressor protection function. Refer to page 46. High  Discharge pipe temperature control. Refer to page 46. ...
  • Page 41 Main Functions SiUS091133 3-D Airflow Alternative repetition of vertical and horizontal swing motions enables uniform airconditioning of the entire room. This function is effective for starting the air conditioner. When the horizontal swing and vertical swing are both set to automatic operation, the airflow becomes 3-D airflow.

  • Page 42: Fan Speed Control For Indoor Unit

    SiUS091133 Main Functions Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature.

  • Page 43: Program Dry Operation

    Main Functions SiUS091133 Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and [FAN] setting buttons are inoperable. Detail The microcomputer automatically sets the temperature and airflow rate. The difference between the room thermistor temperature at start-up and the target temperature is divided into two zones.

  • Page 44: Automatic Operation

    SiUS091133 Main Functions Automatic Operation Outline Automatic Cooling / Heating Function When the automatic operation is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.

  • Page 45: Thermostat Control

    Main Functions SiUS091133 Thermostat Control Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Thermostat OFF Condition  The temperature difference is in the zone A. Thermostat ON Condition  The temperature difference returns to the zone C after being in the zone A. ...

  • Page 46: Night Set Mode

    SiUS091133 Main Functions NIGHT SET Mode Outline When the OFF timer is set, the NIGHT SET Mode is automatically activated. The NIGHT SET Mode keeps the airflow rate setting. Detail The NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in the case of cooling, or lowers it slightly in the case of heating.

  • Page 47: Econo Operation

    Main Functions SiUS091133 ECONO Operation Outline ECONO operation reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.

  • Page 48: Intelligent Eye Operation (Ftxs Series)

    SiUS091133 Main Functions 1.10 INTELLIGENT EYE Operation (FTXS Series) Outline This function detects the existence of humans in the room with a motion sensor (INTELLIGENT EYE) and reduces the capacity when there is nobody in the room in order to save electricity. Detail 1.

  • Page 49: Inverter Powerful Operation

    Main Functions SiUS091133 1.11 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. Detail When [POWERFUL] button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.

  • Page 50: Other Functions

    SiUS091133 Main Functions 1.12 Other Functions 1.12.1 Hot-Start Function In order to prevent the cold air blast that normally comes when heating operation is started, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or made very weak thereby carrying out comfortable heating of the room.

  • Page 51: Function Of Thermistor

    Function of Thermistor SiUS091133 2. Function of Thermistor Electronic expansion valve Four way valve Compressor (R14247) (1) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling the target discharge pipe temperature. The system sets the target discharge pipe temperature according to the outdoor Exchanger and indoor heat exchanger temperature, and controls the electronic expansion valve opening so Thermistor...

  • Page 52: Control Specification

    SiUS091133 Control Specification 3. Control Specification Mode Hierarchy Outline There are 3 modes; normal operation mode, forced operation mode and the power transistor test mode for installation and servicing. Detail Cooling Only Model Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode Normal operation mode...

  • Page 53: Frequency Control

    Control Specification SiUS091133 Frequency Control Outline Frequency is determined according to the difference between the room thermistor temperature and the target temperature. The function is explained as follows. 1. How to determine frequency 2. Frequency command from the indoor unit (Difference between the room thermistor temperature and the target temperature) 3.
  • Page 54 SiUS091133 Control Specification 2. Determine upper limit frequency  The minimum value is set as an upper limit frequency among the frequency upper limits of the following functions: Compressor protection, input current, discharge pipe temperature, heating peak-cut, freeze-up protection, defrost. 3.

  • Page 55: Controls At Mode Changing / Start-Up

    Control Specification SiUS091133 Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline The inverter operation in open phase starts with the conditions of the preheating command from the indoor unit, the outdoor temperature, and the discharge pipe temperature. Detail ON Condition ...

  • Page 56: Discharge Pipe Temperature Control

    SiUS091133 Control Specification 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not activated when defrosting.) (Hz) Frequency (sec.) Time (R13528) 09/12 class 15/18 class 24 class 30/36 class A (Hz)

  • Page 57: Input Current Control

    Control Specification SiUS091133 Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit from the input current. In case of heat pump models, this control which is the upper limit control of the frequency takes priority over the lower limit of control of four-way valve operation compensation.

  • Page 58: Freeze-Up Protection Control

    SiUS091133 Control Specification Freeze-up Protection Control Outline During cooling operation, the signal sent from the indoor unit controls the operating frequency limitation and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into zones.) Detail The operating frequency limitation is judged with the indoor heat exchanger temperature.

  • Page 59: Outdoor Fan Control

    Control Specification SiUS091133 Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control during defrosting The outdoor fan is turned OFF during defrosting.

  • Page 60: Defrost Control

    SiUS091133 Control Specification 3.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish. Detail Conditions for Starting Defrost  The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature.

  • Page 61: Electronic Expansion Valve Control

    Control Specification SiUS091133 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. Pressure equalizing control Open Control 1.

  • Page 62: Pressure Equalizing Control

    SiUS091133 Control Specification 3.11.1 Fully Closing with Power ON The electronic expansion valve is initialized when turning on the power. The opening position is set and the pressure equalization is developed. 3.11.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalization control is activated. The electronic expansion valve opens, and develops the pressure equalization.
  • Page 63 Control Specification SiUS091133 3.11.7 Control for Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensation temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, operates for a specified time, and then stops.

  • Page 64: Malfunctions

    SiUS091133 Control Specification 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. Radiation fin thermistor 4. Outdoor temperature thermistor 3.12.2 Detection of Overcurrent and Overload Outline An excessive output current is detected and the OL temperature is observed to protect the compressor.

  • Page 65: Operation Manual

    SiUS091133 Part 5 Operation Manual 1. System Configuration................56 2. FTXS Series....................57 2.1 Remote Controller ..................57 2.2 AUTO · DRY · COOL · HEAT · FAN Operation .......... 59 2.3 Adjusting the Airflow Direction and Rate ............ 61 2.4 COMFORT AIRFLOW / INTELLIGENT EYE Operation......64 2.5 POWERFUL Operation ................

  • Page 66: System Configuration

    SiUS091133 System Configuration 1. System Configuration After installation and trial operation of the room air conditioner are completed, the air conditioner should be handled and operated as described in the following pages. Every user should be informed on the correct method of operation and how to check if it can cool (or heat) well, and how to use it efficiently.

  • Page 67: Ftxs Series

    FTXS Series SiUS091133 2. FTXS Series Remote Controller Names of Parts Remote Controller Signal transmitter Display (LCD) • Displays the current settings. Receiver (In this illustration, each section is shown with all its displays on for the purpose of explanation.) •...
  • Page 68 SiUS091133 FTXS Series  Open the front cover MODE selector button ECONO button • Selects the operation mode. • ECONO operation. Page 19 (AUTO/DRY/COOL/HEAT/ FAN) Page 11 SWING button • Adjusting the airflow direction. Page 13 COMFORT/SENSOR QUIET button button •...

  • Page 69: Auto · Dry · Cool · Heat · Fan Operation

    FTXS Series SiUS091133 AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode. ...
  • Page 70 SiUS091133 FTXS Series To change the temperature setting Press TEMP°F/°C TEMP°F/°C • The displayed items on the LCD will change whenever either one of the buttons is pressed. COOL operation HEAT operation AUTO operation DRY or FAN operation 64-90°F 50-86°F 64-86°F (18-32°C) (10-30°C)

  • Page 71: Adjusting The Airflow Direction And Rate

    FTXS Series SiUS091133 Adjusting the Airflow Direction and Rate Adjusting the Airflow Direction and Rate You can adjust the airflow direction to increase your comfort.  To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. •...
  • Page 72 SiUS091133 FTXS Series FTXS09/12LVJU  To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Indoor unit quiet Auto Middle low High Middle Middle high • When the airflow is set to “ ”, indoor unit quiet operation will start and the noise from the unit will become quieter.
  • Page 73 FTXS Series SiUS091133 FTXS15/18/24/30/36LVJU  To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Auto Indoor unit quiet Middle low High Middle high Middle • When the airflow is set to “ ”, indoor unit quiet operation will start and the noise from the unit will become quieter.

  • Page 74: Comfort Airflow / Intelligent Eye Operation

    SiUS091133 FTXS Series COMFORT AIRFLOW / INTELLIGENT EYE Operation COMFORT AIRFLOW / INTELLIGENT EYE Operation COMFORT AIRFLOW operation The flow of air will be in the upward direction while in COOL operation and in the downward direction while in HEAT operation, providing comfortable temperatures without air blowing directly on people. COOL operation HEAT operation INTELLIGENT EYE operation...
  • Page 75 FTXS Series SiUS091133  To start operation Press and select the desired mode. • Each time the is pressed a different setting option is displayed on the LCD. • The INTELLIGENT EYE lamp lights green. Display • By selecting “ ”...

  • Page 76: Powerful Operation

    SiUS091133 FTXS Series 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 Press during operation. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.

  • Page 77: Outdoor Unit Quiet Operation

    FTXS Series SiUS091133 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during the night. ...

  • Page 78: Econo Operation

    SiUS091133 FTXS Series ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by limiting the maximum power consumption value. This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances. ...

  • Page 79: Off Timer Operation

    FTXS Series SiUS091133 OFF TIMER Operation OFF 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 80: On Timer Operation

    SiUS091133 FTXS Series ON TIMER Operation ON TIMER Operation  To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Press “ ” is displayed on the LCD. “ ”...

  • Page 81: Weekly Timer Operation

    FTXS Series SiUS091133 2.10 WEEKLY TIMER Operation WEEKLY TIMER Operation Up to 4 timer settings can be saved for each day of the week. It is convenient if the WEEKLY TIMER is set according to the family’s life style.  Using in these cases of WEEKLY TIMER Example: The same timer settings are made for the week from Monday through Friday while different timer settings are made for the weekend.
  • Page 82 SiUS091133 FTXS Series WEEKLY TIMER Operation  To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. Program 1 Program 2 Program 3 Program 4 [Monday]...
  • Page 83 FTXS Series SiUS091133 Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10 minute intervals. • To return to the ON/OFF TIMER mode setting, press • Go to STEP when setting the OFF TIMER. Press •...
  • Page 84 SiUS091133 FTXS Series WEEKLY TIMER Operation Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. Program 1 Program 2 Program 3 Program 4 77˚F (25˚C) [Monday]...
  • Page 85 FTXS Series SiUS091133  Confirming a reservation • The reservation can be confirmed. Setting Displays Normal display Confirmation display Press • The day of the week and the reservation number of current day will be displayed. Press to select the day of the week and the reservation number to be confirmed.
  • Page 86 SiUS091133 FTXS Series WEEKLY TIMER Operation  To delete reservations The individual reservation Press • The day of the week and the reservation number will be displayed. Press to select the day of the week and the reservation number to be deleted. Press •...

  • Page 87: Fdxs Series

    FDXS Series SiUS091133 3. FDXS Series Remote Controller Names of Parts Remote Controller Signal transmitter Display (LCD) • Displays the current settings. Receiver (In this illustration, each section is shown with all its displays on for the purpose of explanation.) •...
  • Page 88 SiUS091133 FDXS Series  Open the front cover MODE selector button • Selects the operation mode. (AUTO/DRY/COOL/HEAT/ FAN) Page 11 QUIET button ECONO button • OUTDOOR UNIT QUIET • ECONO operation. Page 16 operation. Page 15 ON TIMER button OFF TIMER button Page 18 Page 17 CLOCK button...

  • Page 89: Auto · Dry · Cool · Heat · Fan Operation

    FDXS Series SiUS091133 AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode.
  • Page 90 SiUS091133 FDXS Series  To change the temperature setting Press • The displayed items on the LCD will change whenever either one of the buttons is pressed. COOL operation HEAT operation AUTO operation DRY or FAN operation 64-90˚F 50-86˚F 64-86˚F (18-32˚C) (10-30˚C) (18-30˚C)

  • Page 91: Adjusting The Airflow Rate

    FDXS Series SiUS091133 Adjusting the Airflow Rate Adjusting the Airflow Rate  To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Auto Indoor unit quiet Middle low High Middle high Middle •...

  • Page 92: Powerful Operation

    SiUS091133 FDXS Series 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 Press during operation. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.

  • Page 93: Outdoor Unit Quiet Operation

    FDXS Series SiUS091133 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. ...

  • Page 94: Econo Operation

    SiUS091133 FDXS Series ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by limiting the maximum power consumption value. This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances. ...

  • Page 95: Off Timer Operation

    FDXS Series SiUS091133 OFF TIMER Operation OFF 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 96: On Timer Operation

    SiUS091133 FDXS Series ON TIMER Operation ON TIMER Operation  To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Press “ ” is displayed on the LCD. “ ”...

  • Page 97: Service Diagnosis

    SiUS091133 Part 6 Service Diagnosis 1. Troubleshooting with LED .................89 1.1 Indoor Unit....................89 1.2 Outdoor Unit ....................89 2. Problem Symptoms and Measures ............90 3. Service Check Function ................91 4. Troubleshooting ..................94 4.1 Error Codes and Description ..............94 4.2 Indoor Unit PCB Abnormality ..............
  • Page 98 SiUS091133 5.8 “Inverter Checker” Check ................. 146 5.9 Rotation Pulse Check on the Outdoor Unit PCB ........148 5.10 Installation Condition Check..............149 5.11 Discharge Pressure Check............... 150 5.12 Outdoor Fan System Check ..............150 5.13 Main Circuit Short Check................151 5.14 Capacitor Voltage Check................

  • Page 99: Troubleshooting With Led

    Troubleshooting with LED SiUS091133 1. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks 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.

  • Page 100: Problem Symptoms And Measures

    SiUS091133 Problem Symptoms and Measures 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page The unit does not operate. Check the power supply. Check if the rated voltage is supplied. — Check the type of the indoor unit. Check if the indoor unit type is compatible with —...

  • Page 101: Service Check Function

    Service Check Function SiUS091133 3. Service Check Function 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature Check Method 1 display screen. Timer cancel button < ARC452 Series > (R14460) 2. Press the timer cancel button repeatedly until a long beep sounds. ...
  • Page 102 SiUS091133 Service Check Function  , TEMP  , MODE) at the same time to enter the diagnosis mode. Check Method 2 1. Press the 3 buttons (TEMP (R14550) The left-side number blinks. (R9430)  or  button and change the number until you hear the two consecutive 2.
  • Page 103 Service Check Function SiUS091133  or  button  and change the number until you hear the long beep. 5. Press the [TEMP] (R14547) 6. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not.

  • Page 104: Troubleshooting

    SiUS091133 Troubleshooting 4. Troubleshooting Error Codes and Description Reference Error Codes Description Page System Normal — U0 Refrigerant shortage Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Unspecified voltage (between indoor unit and outdoor unit) Indoor Indoor unit PCB abnormality Unit...

  • Page 105: Indoor Unit Pcb Abnormality

    Troubleshooting SiUS091133 Indoor Unit PCB Abnormality Remote Controller Display Method of The system checks if the circuit works properly within the microcomputer of the indoor unit. Malfunction Detection Malfunction The system cannot set the internal settings. Decision Conditions  Wrong models interconnected Supposed ...
  • Page 106 SiUS091133 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the combination of the indoor and outdoor unit. Match the compatible models. ∗ To secure the connection, Check the connection of once disconnect the connector connectors (See Note.).

  • Page 107: Freeze-Up Protection Control Or Heating Peak-Cut Control

    Troubleshooting SiUS091133 Freeze-up Protection Control or Heating Peak-cut Control Remote Controller Display  Freeze-up protection control Method of Malfunction During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor. Detection ...
  • Page 108 SiUS091133 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Be sure to turn off the power switch before connecting or disconnecting Caution Caution connectors, or parts may be damaged. connectors, or parts may be damaged. Check No.01 Check the air passage.

  • Page 109: Fan Motor Or Related Abnormality

    Troubleshooting SiUS091133 Fan Motor or Related Abnormality 4.4.1 DC Motor (FTXS Series) 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 The detected rotation speed does not reach the demanded rotation speed of the target tap, and is Decision less than 50% of the maximum fan motor rotation speed.
  • Page 110 SiUS091133 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.02 Turn off the power supply Refer to P.143 and rotate the fan by hand. Does the fan Replace the indoor rotate smoothly? fan motor.
  • Page 111 Troubleshooting SiUS091133 4.4.2 AC Motor (FDXS Series) 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 The detected rotation speed does not reach the demanded rotation speed of the target tap, and is Decision less than 50% of the maximum fan motor rotation speed.
  • Page 112 SiUS091133 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Start operation. Refer to P.143 Does the fan rotate? Check No. 04 Check Hall IC Turn off the power supply and rotate the fan by hand.

  • Page 113: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting SiUS091133 Thermistor or Related Abnormality (Indoor Unit) C4, C9 Remote Controller Display Method of The temperatures detected by the thermistors determine thermistor errors. Malfunction Detection Malfunction The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Decision Conditions ...

  • Page 114: Refrigerant Shortage

    SiUS091133 Troubleshooting Refrigerant Shortage Remote Controller Display Method of Refrigerant shortage detection I: Malfunction Refrigerant shortage is detected by checking the input current value and the compressor running frequency. If the refrigerant is short, the input current is lower than the normal value. Detection Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of...
  • Page 115 Troubleshooting SiUS091133 Refrigerant shortage detection III: (09/12 class only) When the difference of the temperature is smaller than L, it is regarded as refrigerant shortage. room thermistor temperature – indoor heat exchanger temperature 4.0°C (7.2°F) Cooling outdoor heat exchanger temperature – outdoor temperature 4.0°C (7.2°F) indoor heat exchanger temperature –...
  • Page 116 SiUS091133 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.142 Any thermistor Replace the thermistor(s) disconnected? position. ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗...

  • Page 117: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting SiUS091133 Low-voltage Detection or Over-voltage Detection Remote Controller Display  Indoor Unit Method of Malfunction The zero-cross detection of the power supply is evaluated by the indoor unit PCB. Detection  Outdoor Unit Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit.
  • Page 118 SiUS091133 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Correct the power supply. Voltage as rated? Check the connection of the compressor harness. Loose or Reconnect the harness.

  • Page 119: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    Troubleshooting SiUS091133 Signal Transmission Error (between Indoor Unit 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 The data sent from the outdoor unit cannot be received normally, or the content of the data is Decision abnormal.
  • Page 120 SiUS091133 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.11 Check the indoor unit - outdoor Refer to P.144 unit connection wires. Is there any wiring error? Correct the indoor unit - outdoor unit connection wires.

  • Page 121: Signal Transmission Error On Outdoor Unit Pcb

    Troubleshooting SiUS091133 Signal Transmission Error on Outdoor Unit PCB (24/30/36 Class Only) Remote Controller Display Method of Communication error between microcomputer mounted on the main microcomputer and PM1. Malfunction Detection  The abnormality is determined when the data sent from the PM1 can not be received for 9 Malfunction seconds.

  • Page 122: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiUS091133 Troubleshooting 4.10 Unspecified Voltage (between Indoor Unit and Outdoor Unit) 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.

  • Page 123: Outdoor Unit Pcb Abnormality

    Troubleshooting SiUS091133 4.11 Outdoor Unit PCB Abnormality Remote Controller Display  The system checks if the microprocessor is working in order. Method of  The system checks if the zero-cross signal comes in properly. Malfunction Detection  The microprocessor program runs out of control. Malfunction ...
  • Page 124 SiUS091133 Troubleshooting Troubleshooting 24/30/36 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. ∗ Before you check the LED A, cancel the standby electricity Turn on the power again. saving function by starting fan operation with the remote controller.

  • Page 125: Ol Activation (Compressor Overload)

    Troubleshooting SiUS091133 4.12 OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection  If the error repeats, the system is shut down. Malfunction  Reset condition: Continuous run for about 60 minutes without any other error Decision ...

  • Page 126: Compressor Lock

    SiUS091133 Troubleshooting 4.13 Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the position Malfunction detection circuit. Detection Malfunction 09/12 class  Operation stops due to overcurrent. Decision  If the error repeats, the system is shut down. Conditions ...

  • Page 127: Dc Fan Lock

    Troubleshooting SiUS091133 4.14 DC Fan Lock Remote Controller Display Method of An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Malfunction Detection  The fan does not start in 15 ~ 30 seconds (depending on the model) even when the fan motor is Malfunction Decision running.

  • Page 128: Input Overcurrent Detection

    SiUS091133 Troubleshooting 4.15 Input Overcurrent Detection Remote Controller Display Method of An input overcurrent is detected by checking the input current value with the compressor running. Malfunction Detection  The current exceeds about 9.25 ~ 20 A for 2.5 seconds with the compressor running. Malfunction Decision (The upper limit of the current decreases when the outdoor temperature exceeds a certain...

  • Page 129: Fourway Valve Abnormality

    Troubleshooting SiUS091133 4.16 FourWay Valve Abnormality Remote Controller Display Method of The room temperature thermistor and the indoor heat exchanger thermistor are checked if they Malfunction function within their normal ranges in each operation mode. Detection Malfunction A following condition continues over 1 ~ 10 minutes after operating for 5 ~ 10 minutes. ...
  • Page 130 SiUS091133 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Four-way valve Refer to P.142 coil disconnected (loose)? Correct the four-way valve coil. Check No.13 Harness out of Refer to P.145 connector? Reconnect the harness.

  • Page 131: Discharge Pipe Temperature Control

    Troubleshooting SiUS091133 4.17 Discharge Pipe Temperature Control Remote Controller Display Method of An error is determined with the temperature detected by the discharge pipe thermistor. Malfunction Detection  If the temperature detected by the discharge pipe thermistor rises above A, the compressor Malfunction Decision stops.
  • Page 132 SiUS091133 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Check No. 01 Refer to P.142 Check the thermistors. Replace the defective * Discharge pipe thermistor thermistor(s).

  • Page 133: High Pressure Control In Cooling

    Troubleshooting SiUS091133 4.18 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the Malfunction temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection ...
  • Page 134 SiUS091133 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Check the installation space. Refer to P.142 Check No. 17 Check No.12 Change the installation Check the installation Refer to P.144 condition.

  • Page 135: Compressor System Sensor Abnormality

    Troubleshooting SiUS091133 4.19 Compressor System Sensor Abnormality 4.19.1 09/12/15/18 Class Remote Controller Display  The system checks the DC current before the compressor starts. Method of Malfunction Detection  The DC current before compressor start-up is out of the range 0.5 ~ 4.5 V (sensor output Malfunction Decision converted to voltage value)
  • Page 136 SiUS091133 Troubleshooting 4.19.2 24/30/36 Class Remote Controller Display  The system checks the supply voltage and the DC voltage before the compressor starts. Method of  The system checks the compressor current right after the compressor starts. Malfunction Detection  The supply voltage and the DC voltage is obviously low or high. Malfunction ...
  • Page 137 Troubleshooting SiUS091133 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power. Check the connection of the reactor. Connection OK? Connect the reactor properly. Check the connection of the compressor.

  • Page 138: Position Sensor Abnormality

    SiUS091133 Troubleshooting 4.20 Position Sensor Abnormality Remote Controller Display Method of A compressor start-up failure is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection  If the error repeats, the system is shut down. Malfunction ...
  • Page 139 Troubleshooting SiUS091133 Troubleshooting 09/12/15/18 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Turn off the power. Refer to P.146 Check the power supply voltage. Check No.18 Refer to P.150 Voltage as rated? Correct the power supply.
  • Page 140 SiUS091133 Troubleshooting Troubleshooting 24/30/36 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Refer to P.146 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.150 Voltage as rated? Correct the power supply.

  • Page 141: Dc Voltage / Current Sensor Abnormality (09/12 Class Only)

    Troubleshooting SiUS091133 4.21 DC Voltage / Current Sensor Abnormality (09/12 Class Only) Remote Controller Display Method of DC voltage or DC current sensor abnormality is identified based on the compressor running Malfunction frequency and the input current. Detection  If the error repeats, the system is shut down. Malfunction ...

  • Page 142: Ct Or Related Abnormality (24/30/36 Class Only)

    SiUS091133 Troubleshooting 4.22 CT or Related Abnormality (24/30/36 Class Only) Remote Controller Display Method of A CT or related error is detected by checking the compressor running frequency and CT-detected Malfunction input current. Detection  The compressor running frequency is more than A Hz, and the CT input current is less than B Malfunction Decision Conditions...
  • Page 143 Troubleshooting SiUS091133 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Turn off the power and turn it on Refer to P.146 again. Check No.21 Start operation. Refer to P.152 ∗...

  • Page 144: Thermistor Or Related Abnormality (Outdoor Unit)

    SiUS091133 Troubleshooting 4.23 Thermistor or Related Abnormality (Outdoor Unit) H9, J3, J6, P4 Remote Controller Display Method of This fault is identified based on the thermistor input voltage to the microcomputer. Malfunction A thermistor fault is identified based on the temperature sensed by each thermistor. Detection ...
  • Page 145 Troubleshooting SiUS091133 Troubleshooting In case of “H9” “J3” “J6” Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.142 Turn on the power again. Error displayed Reconnect the connectors again on remote or thermistors.

  • Page 146: Electrical Box Temperature Rise

    SiUS091133 Troubleshooting 4.24 Electrical Box Temperature Rise Remote Controller Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor off. Detection  With the compressor off, the radiation fin temperature is above A. Malfunction ...
  • Page 147 Troubleshooting SiUS091133 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 WARNING Turn off the power and turn it on again. To cool the electrical components, Refer to P.149 the outdoor fan starts when the radiation fin temperature rises above C and stops when it drops...

  • Page 148: Radiation Fin Temperature Rise

    SiUS091133 Troubleshooting 4.25 Radiation Fin Temperature Rise Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor on. Detection  If the radiation fin temperature with the compressor on is above A. Malfunction ...
  • Page 149 Troubleshooting SiUS091133 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 Turn off the power and turn it on Refer to P.149 again to start the system. Check No.19 Refer to P.150 Has the PCB been...

  • Page 150: Output Overcurrent Detection

    SiUS091133 Troubleshooting 4.26 Output Overcurrent Detection Remote Controller Display Method of An output overcurrent is detected by checking the current that flows in the inverter DC section. Malfunction Detection  A position signal error occurs while the compressor is running. Malfunction ...
  • Page 151 Troubleshooting SiUS091133 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output Check No.15 overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.

  • Page 152: Check

    SiUS091133 Check 5. Check Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the table and the graph below.

  • Page 153: Fan Motor Connector Output Check

    Check SiUS091133 Fan Motor Connector Output Check Check No.02 FTXS series 1. Check the connection of connector. 2. Check the motor power supply voltage output (pins 4 - 7). 3. Check the motor control voltage (pins 4 - 3). 4. Check the rotation command voltage (pins 4 - 2). 5.

  • Page 154: Power Supply Waveforms Check

    SiUS091133 Check Power Supply Waveforms Check Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal board, and check the waveform disturbance.  Check to see if the power supply waveform is a sine wave. (Fig.1) ...

  • Page 155: Fourway Valve Performance Check

    Check SiUS091133 FourWay Valve Performance Check Check No.13 Turn the power off and then on again. * Four-way valve coil Start heating operation. Cooling / Dry : No continuity Heating : Continuity S80 voltage at 220 - 240 VAC with Replace the outdoor unit compressor on? (Fig.

  • Page 156: Inverter Checker" Check

    SiUS091133 Check “Inverter Checker” Check  Characteristics Check No.15 If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (control PCB, power module, etc.).
  • Page 157 Check SiUS091133  Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) If all the LEDs are lit uniformly, the compressor is defective.  Replace the compressor. (2) If the LEDs are not lit uniformly, check the power module. ...

  • Page 158: Rotation Pulse Check On The Outdoor Unit Pcb

    SiUS091133 Check Rotation Pulse Check on the Outdoor Unit PCB Check No.16 09/12 class 1. Check that the voltage between the pins 10 - 11 is 15 VDC. 2. Check if the Hall IC generates the rotation pulse (0 ~ 15 VDC) 4 times between the pins 10 -12, 10 - 13, when the fan motor is manually rotated once.

  • Page 159: Installation Condition Check

    Check SiUS091133 5.10 Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty? exchanger.

  • Page 160: Discharge Pressure Check

    SiUS091133 Check 5.11 Discharge Pressure Check Check No.18 Discharge pressure check High? Replace the compressor. Is the stop valve open? Open the stop valve. Is the connection pipe Replace the pipe installed at deformed? the site. Is the air Dirty filter or indoor / outdoor Clean the dirty air filter or heat exchanger...

  • Page 161: Main Circuit Short Check

    Check SiUS091133 5.13 Main Circuit Short Check Check No.20 Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx. 0 V before checking.  Measure the resistance between the pins of the DB1 referring to the table below. ...

  • Page 162: Capacitor Voltage Check

    SiUS091133 Check 15/18 class Tester (R14700) 5.14 Capacitor Voltage Check Check No.21 Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question.

  • Page 163: Power Module Check

    Check SiUS091133 5.15 Power Module Check Check No.22 Note: Check to make sure that the voltage between (+) and (–) of the power module is approx. 0 V before checking.  Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.
  • Page 164 SiUS091133 Check 15/18 class Power module (R16697) 24/30/36 class Power module (R16073) Service Diagnosis...

  • Page 165: Removal Procedure

    SiUS091133 Part 7 Removal Procedure 1. Indoor Unit: FTXS09/12LVJU..............157 1.1 Removal of Air Filters ................157 1.2 Removal of Front Panel................159 1.3 Removal of Front Grille ................160 1.4 Removal of Horizontal Blades / Vertical Blades ........162 1.5 Removal of Electrical Box ................ 166 1.6 Removal of PCBs ..................
  • Page 166 SiUS091133 5.4 Removal of PCBs ..................308 5.5 Removal of Sound Blankets / Thermistors ..........316 5.6 Removal of FourWay Valve..............320 5.7 Removal of Electronic Expansion Valve........... 321 5.8 Removal of Compressor................323 6. Outdoor Unit: RXS24LVJU..............326 6.1 Removal of Outer Panels ................. 326 6.2 Removal of Electrical Box ................

  • Page 167: Indoor Unit: Ftxs09/12Lvju

    Indoor Unit: FTXS09/12LVJU SiUS091133 1. Indoor Unit: FTXS09/12LVJU Removal of Air Filters Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Appearance features Warning Dangerous: High voltage A high voltage is applied to all the electric circuits of this product including thermistors.
  • Page 168 SiUS091133 Indoor Unit: FTXS09/12LVJU Step Procedure Points 3. Remove the Titanium apatite photocatalytic air- purifying filters.  The right and left filters are The Titanium apatite Air filter photocatalytic air- interchangeable. purifying filter ASSY is attached to the back of the air filter.

  • Page 169: Removal Of Front Panel

    Indoor Unit: FTXS09/12LVJU SiUS091133 Removal of Front Panel Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Open the front panel Front panel over the position where it stops.

  • Page 170: Removal Of Front Grille

    SiUS091133 Indoor Unit: FTXS09/12LVJU Removal of Front Grille Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the service cover. Remove the screw of Preparation Service cover ...
  • Page 171 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points 2. Remove the front grille. Remove the 2 screws. (R13490)  The convex marks (...) on the Unfasten the 3 hooks at Hook the top. front panel indicate the position of the hooks. (R12715) (R13491) ...

  • Page 172: Removal Of Horizontal Blades / Vertical Blades

    SiUS091133 Indoor Unit: FTXS09/12LVJU Removal of Horizontal Blades / Vertical Blades Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the horizontal blade (large). ...
  • Page 173 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points 2. Remove the horizontal blade (small). Unfasten the center shaft while bending the horizontal blade (small) Horizontal blade (small) slightly. (R7925) Unfasten the left shaft. (R7926)  There is a key alignment at the Unfasten the right shaft.
  • Page 174 SiUS091133 Indoor Unit: FTXS09/12LVJU Step Procedure Points Remove the fan guard. (R8079) 4. Remove the vertical blade Pivot Vertical blade ASSY ASSYs. Detach the pivot from the interlock shaft for vertical blades with a flat screwdriver. Interlock shaft (R13092) Remove the interlock Interlock rod rod.
  • Page 175 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points  A vertical blade ASSY has 5 Remove the vertical Hook blade ASSY. fins. It is impossible to replace only one fin.  The vertical blade ASSY is not marked for difference between right and left.

  • Page 176: Removal Of Electrical Box

    SiUS091133 Indoor Unit: FTXS09/12LVJU Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step The figure shows the Preparation Electrical box  Remove the front grille connections of the wire harnesses.
  • Page 177 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points Disconnect the connector for the fan motor [S1]. [S1] (R13499) Disconnect the connector for the swing motors [S41]. [S41] (R7935) Release the harness for the swing motors from the hook. (R7936) Removal Procedure...
  • Page 178 SiUS091133 Indoor Unit: FTXS09/12LVJU Step Procedure Points  The position of the indoor heat Pull out the indoor heat Indoor heat exchanger thermistor exchanger thermistor. exchanger thermistor varies by model.  Be careful not to lose the clip of the thermistor. Clip (R7937) (R11268)
  • Page 179 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points  There is a hook also at the lower Lift up the electrical box and pull it out. part of the back. When reassembling the electrical box, make sure that it is securely fastened.

  • Page 180: Removal Of Pcbs

    SiUS091133 Indoor Unit: FTXS09/12LVJU Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the shield plate. The figure shows the Preparation ...
  • Page 181 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points 2. Remove the terminal board. Remove the screw and Terminal board remove the terminal board. (R10315) 3. Remove the signal Signal receiver unit receiver unit. Unfasten the 3 hooks. (R12277) Unfasten the hook on the opposite side, and lift up the signal receiver unit.
  • Page 182 SiUS091133 Indoor Unit: FTXS09/12LVJU Step Procedure Points Hook (R12278) Remove the signal receiver unit. Signal receiver unit (R8088) 4. Remove the INTELLIGENT EYE sensor PCB. Unfasten the 3 hooks INTELLIGENT EYE and remove the sensor PCB INTELLIGENT EYE sensor PCB. (R8092) Disconnect the [S26]...
  • Page 183 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points 5. Remove the signal receiver PCB. Unfasten the 3 hooks and remove the signal receiver PCB. Signal receiver (R8090) Disconnect the [S48] connector [S48] from the signal receiver PCB. (R8091)  The display PCB is positioned 6.
  • Page 184 SiUS091133 Indoor Unit: FTXS09/12LVJU Step Procedure Points Unfasten the 4 hooks and remove the display PCB. Hook (R10318) Disconnect the connector [S49] from the display PCB. [S49] LED 3 (Green) LED 2 (Yellow) LED 1 (Green) (R8096) 7. Remove the control PCB. Hook Unfasten the lower 2 hooks of the control...
  • Page 185 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points The figures show the [S1]: DC fan motor names of the PCB [S25]: INTELLIGENT EYE component parts. sensor PCB [S26]: control PCB [S32] [S32]: indoor heat exchanger thermistor [S41]: swing motors [S1] [S46]: display PCB [S47]: signal receiver PCB [S48] [S49]: control PCB ...

  • Page 186: Removal Of Swing Motors

    SiUS091133 Indoor Unit: FTXS09/12LVJU Removal of Swing Motors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the swing motor for vertical blades. Lift the indoor unit with a wooden base.
  • Page 187 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points Detach the pivot from Pivot the interlock shaft for Vertical blade vertical blades with a flat screwdriver. Interlock shaft (R13092) Remove the swing motor unit. Swing motor unit (R8126) Detach the interlock Interlock shaft shaft from the swing motor with a flat screwdriver.
  • Page 188 SiUS091133 Indoor Unit: FTXS09/12LVJU Step Procedure Points Remove the 2 screws. Screw (R13573) Remove the swing motor for vertical blades. (R10333)  Connector: green Disconnect the connector. (R10334) Removal Procedure...
  • Page 189 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points 2. Remove the swing motors for horizontal blades. Caution When reassembling, do not Remove the screw and confuse the installing order of remove the swing the 2 motors and the colors of motors for horizontal the connectors.

  • Page 190: Removal Of Indoor Heat Exchanger

    SiUS091133 Indoor Unit: FTXS09/12LVJU Removal of Indoor Heat Exchanger Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Disconnect the refrigerant Preparation  Remove the electrical box piping.
  • Page 191 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points 2. Remove the indoor heat exchanger. Detach the indoor unit Piping from the installation fixture plate. Unfasten the hook of the piping fixture at the back of the indoor unit. Remove the piping fixture.
  • Page 192 SiUS091133 Indoor Unit: FTXS09/12LVJU Step Procedure Points Unfasten the upper hook on the right side with a flat screwdriver. Upper hook (R13138)  When reassembling the indoor After unfastening the Indoor heat exchanger lower hooks, lift up the heat exchanger, make sure that indoor heat exchanger the right hooks (upper and by its right side.

  • Page 193: Removal Of Fan Motor

    Indoor Unit: FTXS09/12LVJU SiUS091133 Removal of Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the right side Preparation  Remove the indoor heat plate.
  • Page 194 SiUS091133 Indoor Unit: FTXS09/12LVJU Step Procedure Points Remove the 2 screws of the fan motor fixing plate. Fan motor fixing plate (R8116) Unfasten the hook of the fan motor fixing plate and remove the plate. (R8117) (R8118) 2. Remove the fan motor. Dislocate the fan rotor by sliding it to the right.
  • Page 195 Indoor Unit: FTXS09/12LVJU SiUS091133 Step Procedure Points  When reassembling the fan Loosen the lock screw and remove the fan motor and the fan rotor, provide motor. as much as 5 mm (0.2 inch) of Lock screw play between the side face of the rotor and the bottom frame.

  • Page 196: Indoor Unit: Ftxs15/18/24Lvju

    SiUS091133 Indoor Unit: FTXS15/18/24LVJU 2. Indoor Unit: FTXS15/18/24LVJU Removal of Air Filters / Front Panel Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Appearance features Warning Dangerous: High voltage A high voltage is applied to all...
  • Page 197 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points 3. Remove the Titanium apatite photocatalytic air- purifying filters.  The right and left filters are Remove the Titanium apatite photocatalytic interchangeable. Air filter air-purifying filter ASSY by unfastening the projections from the back of the air filter frame.
  • Page 198 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points 4. Remove the front panel. While opening the front Front Panel panel further than it stops, release both the shafts. (R16456)  Slide the front panel from side to side to release each shaft. ...

  • Page 199: Removal Of Front Grille

    Indoor Unit: FTXS15/18/24LVJU SiUS091133 Removal of Front Grille Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the service cover. Remove the screw and remove the service cover.
  • Page 200 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points Remove the screw caps with a flat screwdriver. (R16266) Remove the lower 3 screws. (R16686)  The convex marks (...) on the Unfasten the 3 hooks on the top of the front front panel indicate the position Hook grille.
  • Page 201 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points  When reassembling, make sure Pull the upper part of the front grille out and that all the 3 hooks are fastened lift the lower part up, as they were. and then remove the front grille.

  • Page 202: Removal Of Electrical Box

    SiUS091133 Indoor Unit: FTXS15/18/24LVJU Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Layout of the parts Preparation  Remove the front grille according to the “Removal of Front Grille.”...
  • Page 203 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points 3. Release the ground wire and the indoor heat exchanger thermistor. Cut the clamp (R16274) Pull out and release the ground wire. (R16275)  The position of the indoor heat Pull out the indoor heat exchanger thermistor.
  • Page 204 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points 4. Remove the electrical Terminal board box. Remove the 4 screws and disconnect the connection wires on the terminal board. Remove the screw and remove the wire retainer. Wire retainer (R16277) Disconnect the connector for the fan motor [S1] and release the harness from the...
  • Page 205 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points Release the harness from the hooks. (R16280) Remove the screw of Electrical box the electrical box. (R16281)  Fit the back hook of the Lift up the electrical box from the bottom frame electrical box to the bottom and remove it.

  • Page 206: Removal Of Pcbs

    SiUS091133 Indoor Unit: FTXS15/18/24LVJU Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the signal receiver PCB. Unfasten the hooks of Preparation ...
  • Page 207 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points Remove the screw of the terminal board. (R16285) Remove the terminal board. (1 hook at the back) Terminal board (R16286) Cut the clamp. Clamp (R16971) Removal Procedure...
  • Page 208 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points  When reassembling, make sure Release the harness from the hook. to hook the harness. Hook (R9514) Push and unfasten the hook of the signal receiver unit. Hook Signal receiver unit (R13518) Open the signal receiver unit.
  • Page 209 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points Unfasten the hook on Signal receiver PCB the right of the signal receiver PCB. (Then the signal receiver PCB is lifted up.) Signal receiver unit (R13519) Remove the signal receiver PCB. (R9521) Disconnect the connector.
  • Page 210 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points 2. Remove the INTELLIGENT EYE sensor PCB. Unfasten the 2 hooks on the right and then the 2 hooks on the left. Remove the INTELLIGENT EYE sensor ASSY. Hook Hook INTELLIGENT EYE sensor ASSY (R9523) (R9524) ...
  • Page 211 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points Remove the shield plate by unfastening the 2 hooks. Hook INTELLIGENT EYE sensor PCB Shield plate (rear) (R9526) Disconnect the connector. [S36]: control PCB [S36] (R9527) 3. Remove the display PCB. Unfasten the 4 hooks. Display PCB (R9528) Removal Procedure...
  • Page 212 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points Lift up the display PCB. (R9529) Release the harness from the hook. Hook (R9530) Disconnect the connector. [S49]: to control PCB [S49] (R9531) [S49] (R13520) Removal Procedure...
  • Page 213 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points 4. Remove the control PCB. Control PCB Unfasten the 3 hooks. Lift up and remove the control PCB. Hook Hook (R9517) Pull out the ground wire from the terminal board. Ground wire (R16550) Removal Procedure...
  • Page 214 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points Pull out the terminals from the terminal board. Terminal (R9519) [S1] : DC fan motor [S25] : INTELLIGENT EYE sensor [S32] : indoor heat exchanger thermistor [S41] : swing motors [S46] : display PCB [S47] : signal receiver PCB ...

  • Page 215: Removal Of Horizontal Blades / Swing Motors

    Indoor Unit: FTXS15/18/24LVJU SiUS091133 Removal of Horizontal Blades / Swing Motors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the horizontal blades. Hold the indoor unit up with something sturdy such as a piece of wood.
  • Page 216 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points inner left (R9538) right Horizontal blade (R9535)  Remove both the horizontal Remove the horizontal blade. blades (upper and lower) in the same way. (R16292) Removal Procedure...
  • Page 217 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points 2. Remove the air outlet ASSYs. Remove the air outlet ASSYs by pushing the 2 hooks at the back of each. (R16687)  The 3 air outlet ASSYs are bound with sealing materials. (R16688) 3.
  • Page 218 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points 4. Remove the swing motors for horizontal blades. Release the interlock rod. Interlock rod (R9546) Remove the screw at the rear of the indoor unit. (R16296) Remove the 2 screws (front and rear). (R16297) Removal Procedure...
  • Page 219 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points Pull out the drain hose, then remove the swing motor unit. Drain hose Swing motor unit (R16298) Remove the screw at the center. (R9548) Remove the 2 pivots. (R9549) Removal Procedure...
  • Page 220 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points Remove the swing Swing motor (upper blade) motors. Caution When reassembling, do not confuse the installing order of the 2 motors and the colors of the connectors. If you set the connectors or motors opposite, the horizontal blades do not move smoothly or noise may be heard.
  • Page 221 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points Remove the interlock rod (2) with pliers. Interlock rod (2) (R9553) (R9554) Remove the interlock rod (1). Interlock rod (1) (R9555) Removal Procedure...
  • Page 222 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points Remove the 2 screws. (R9556) Remove the swing motor for the vertical blade. Swing motor for vertical blade (R9557) Disconnect the connector. (R9558) Removal Procedure...

  • Page 223: Removal Of Indoor Heat Exchanger

    Indoor Unit: FTXS15/18/24LVJU SiUS091133 Removal of Indoor Heat Exchanger Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Disconnect the refrigerant Preparation  Remove the electrical box piping.
  • Page 224 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points 2. Remove the piping fixture. Detach the indoor unit from the installation plate. (R16524) Push the bottom frame. Bottom frame (R16309) Release the piping fixture. Piping fixture (R9573) Removal Procedure...
  • Page 225 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points Remove the piping fixture. (R9574) 3. Remove the indoor heat exchanger. Widen the auxiliary piping. (R9575) Remove the 2 screws on the left side. Caution When removing or reassembling the indoor heat exchanger, be sure to wear gloves or wrap the indoor heat exchanger with cloths.
  • Page 226 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points Push the hook on the right side and unfasten (R16310)  Press the right side of the indoor Lift up and remove the indoor heat exchanger. heat exchanger, and lift it up from the left side. Indoor heat exchanger (R16311)

  • Page 227: Removal Of Fan Motor / Fan Rotor

    Indoor Unit: FTXS15/18/24LVJU SiUS091133 Removal of Fan Motor / Fan Rotor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the right side plate. Remove the 2 screws.
  • Page 228 SiUS091133 Indoor Unit: FTXS15/18/24LVJU Step Procedure Points Remove the fan motor fixing plate. (R16973) Release the fan motor harness from the hook. (R16304) Loosen the screw of the Fan rotor fan rotor. (R9648) Removal Procedure...
  • Page 229 Indoor Unit: FTXS15/18/24LVJU SiUS091133 Step Procedure Points  When reassembling the fan Remove the fan motor. motor and the fan rotor, provide as much as 5 mm (0.2 inch) of play between the side face of the rotor and the bottom frame. Fan motor Side face of Side face of rotor...

  • Page 230: Removal Of Vertical Blade Assys

    SiUS091133 Indoor Unit: FTXS15/18/24LVJU Removal of Vertical Blade ASSYs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step   When reassembling, Unfasten the 2 hooks of each vertical blade connect the 3 vertical blade ASSY.

  • Page 231: Indoor Unit: Ftxs30/36Lvju

    Indoor Unit: FTXS30/36LVJU SiUS091133 3. Indoor Unit: FTXS30/36LVJU Removal of Air Filters / Front Panel Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Appearance features Warning Dangerous: High voltage A high voltage is applied to all...
  • Page 232 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points 3. Remove the Titanium apatite photocatalytic air- purifying filters.  The 3 filters are Remove the Titanium apatite photocatalytic interchangeable. Air filter air-purifying filter ASSY by unfastening the projections from the back of the air filter frame.
  • Page 233 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points 4. Remove the front panel. While opening the front panel further than it Front Panel stops, release both the shafts. (R9479)  Slide the front panel from side to side to release each shaft. ...

  • Page 234: Removal Of Front Grille

    SiUS091133 Indoor Unit: FTXS30/36LVJU Removal of Front Grille Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the service cover. Remove the screw and remove the service cover.
  • Page 235 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points Remove the screw caps with a flat screwdriver. (R16266) Remove the lower 3 screws. (R9488)  The Illustration shows the left Remove the 3 front grille fixtures. fixture. Front grille fixture (R9489) Removal Procedure...
  • Page 236 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points (R9490)  The convex marks (...) on the Unfasten the 4 hooks on the top of the front front panel indicate the position Hook grille. of the hooks. (R9486) (R12715) Hook (R9487) Removal Procedure...
  • Page 237 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points  When reassembling, make sure Pull the upper part of the front grille out and that all the 4 hooks are fastened lift the lower part up, as they were. and then remove the front grille.

  • Page 238: Removal Of Electrical Box

    SiUS091133 Indoor Unit: FTXS30/36LVJU Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Layout of the parts Preparation  Remove the front grille according to the “Removal of Front Grille.”...
  • Page 239 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points 3. Release the ground wire and the indoor heat exchanger thermistor. Remove the screw and release the ground wire. Ground wire (R16976)  Be careful not to lose the clip of Pull out the indoor heat exchanger thermistor.
  • Page 240 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points Disconnect the connector for the fan motor [S1] and release the harness from the hook. (R9500) [S1] Release the ferrite core. Ferrite core (R9501) Disconnect the connector for the swing motors [S41]. [S41] (R9502) Removal Procedure...
  • Page 241 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points Release the harness from the hooks. (R9503) Remove the screw of Electrical box the electrical box. (R9504)  Fit the back hook of the Lift up the electrical box from the bottom frame electrical box to the bottom and remove it.

  • Page 242: Removal Of Pcbs

    SiUS091133 Indoor Unit: FTXS30/36LVJU Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the signal receiver PCB. Unfasten the hooks of the shield plate.
  • Page 243 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points Remove the screw of the terminal board. (R9511) Remove the terminal board. (1 hook at the back) Terminal board (R9512) Cut the clamp. Clamp (R9513) Removal Procedure...
  • Page 244 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points  When reassembling, make sure Release the harness from the hook. to hook the harness. Hook (R9514) Push and unfasten the hook of the signal receiver unit. Hook Signal receiver unit (R13518) Open the signal receiver unit.
  • Page 245 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points Unfasten the hook on Signal receiver PCB the right of the signal receiver PCB. (Then the signal receiver PCB is lifted up.) Signal receiver unit (R13519) Remove the signal receiver PCB. (R9521) Disconnect the connector.
  • Page 246 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points 2. Remove the INTELLIGENT EYE sensor PCB. Unfasten the 2 hooks on the right and then the 2 hooks on the left. Remove the INTELLIGENT EYE sensor ASSY. Hook Hook INTELLIGENT EYE sensor ASSY (R9523) (R9524) ...
  • Page 247 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points Remove the shield plate by unfastening the 2 hooks. Hook INTELLIGENT EYE sensor PCB Shield plate (rear) (R9526) Disconnect the connector. [S36]: control PCB [S36] (R9527) Removal Procedure...
  • Page 248 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points 3. Remove the display PCB. Unfasten the 4 hooks. Display PCB (R9528) Lift up the display PCB. (R9529) Release the harness from the hook. Hook (R9530) Removal Procedure...
  • Page 249 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points Disconnect the connector. [S49]: control PCB [S49] (R9531) [S49] (R13520) 4. Remove the control PCB. Unfasten the 3 hooks. Control PCB Lift up and remove the control PCB. Hook Hook (R9517) Pull out the ground wire from the terminal board.
  • Page 250 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points Pull out the terminals from the terminal board. Terminal (R9519) [S1] : DC fan motor [S25] : INTELLIGENT EYE sensor [S32] : indoor heat exchanger thermistor [S41] : swing motors [S46] : display PCB [S47] : signal receiver PCB ...

  • Page 251: Removal Of Horizontal Blades / Swing Motors

    Indoor Unit: FTXS30/36LVJU SiUS091133 Removal of Horizontal Blades / Swing Motors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the horizontal blades. Hold the indoor unit up with a piece of wood etc.
  • Page 252 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points  Removing order Release the shafts in   (right  left  inner right  turn. inner left) right Horizontal blade (R9535) left (R9536) inner right (R9537) Removal Procedure...
  • Page 253 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points inner left (R9538)  Remove both the horizontal Remove the horizontal blade. blades (upper and lower) in the same way. (R9539) 2. Remove the fan guards. Remove the sealing material (horizontal). (R14469) Remove the sealing material (vertical).
  • Page 254 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points  Remove the center and right air Remove the left air outlet ASSY by pushing outlet ASSY likewise. the 2 hooks at the back. Air outlet ASSY (R14471) Hook (R9543)  Remove the other 2 fan guards Unfasten the 4 lower Fan guard hooks and the 2 upper...
  • Page 255 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points 3. Remove the swing motors for horizontal blades. Release the interlock rod. Interlock rod (R9546) Pull out the drain hose, then remove the swing motor unit. Drain hose Swing motor unit (R13579) Remove the screw at the center.
  • Page 256 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points Remove the 2 pivots. (R9549) Remove the swing Swing motor (upper blade) motors. Caution When reassembling, do not confuse the installing order of the 2 motors and the colors of the connectors. If you set the connectors or motors opposite, the horizontal blades do not move smoothly or the noise may be heard.
  • Page 257 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points 4. Remove the swing motor for vertical blades. Remove the link cover. Link cover (R9552) Remove the interlock rod (2) with pliers. Interlock rod (2) (R9553) (R9554) Removal Procedure...
  • Page 258 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points Remove the interlock rod (1). Interlock rod (1) (R9555) Remove the 2 screws. (R9556) Remove the swing motor for the vertical blade. Swing motor for vertical blade (R9557) Removal Procedure...
  • Page 259 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points Disconnect the connector. (R9558) Removal Procedure...

  • Page 260: Removal Of Fan Motor

    SiUS091133 Indoor Unit: FTXS30/36LVJU Removal of Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Loosen the screw of the fan motor from the air outlet.
  • Page 261 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points Unfasten the hook at the front and remove the fan motor fixing plate. Hook (R9561) (R9562) Release the harness from the hook, and remove the screw of the motor mounting plate. Motor mounting plate (R9563) Removal Procedure...
  • Page 262 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points  When reassembling the fan Remove the motor mounting plate. motor and the fan rotor, provide as much as 5 mm (0.2 inch) of play between the side face of the rotor and the bottom frame. Side face of Side face of rotor bottom frame...
  • Page 263 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points  When reassembling, engage Remove the vibration absorber. the vibration absorber completely. Vibration absorber (R9566) (R9567) Removal Procedure...

  • Page 264: Removal Of Indoor Heat Exchanger

    SiUS091133 Indoor Unit: FTXS30/36LVJU Removal of Indoor Heat Exchanger Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Disconnect the refrigerant Preparation  Remove the electrical box piping.
  • Page 265 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points 2. Remove the piping fixture. Detach the indoor unit from the installation plate. (R9571) Push the bottom frame. Bottom frame (R9572) Release the piping fixture. Piping fixture (R9573) Removal Procedure...
  • Page 266 SiUS091133 Indoor Unit: FTXS30/36LVJU Step Procedure Points Remove the piping fixture. (R9574) 3. Remove the indoor heat exchanger. Widen the auxiliary piping. (R9575) Remove the 2 screws on the left side. Caution When removing or reassembling the indoor heat exchanger, be sure to wear gloves or wrap the indoor heat exchanger with cloths.
  • Page 267 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points Push the hook on the right side and unfasten (R13581)  Press the right side of the indoor Lift up and remove the indoor heat exchanger. heat exchanger, and lift it up from the left side. Indoor heat exchanger (R9578)

  • Page 268: Removal Of Fan Rotor

    SiUS091133 Indoor Unit: FTXS30/36LVJU Removal of Fan Rotor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the right side plate. Remove the 2 screws. Right side plate (R9579) Lift the right side plate...
  • Page 269 Indoor Unit: FTXS30/36LVJU SiUS091133 Step Procedure Points Loosen the screw of the Fan rotor fan rotor. (R9648)  When reassembling the fan Remove the fan motor. motor and the fan rotor, provide as much as 5 mm (0.2 inch) of play between the side face of the rotor and the bottom frame.

  • Page 270: Removal Of Vertical Blade Assys

    SiUS091133 Indoor Unit: FTXS30/36LVJU Removal of Vertical Blade ASSYs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step   When reassembling, Unfasten the 2 hooks of each vertical blade connect the 3 vertical blade ASSY.

  • Page 271: Outdoor Unit: Rxs09/12Lvju

    Outdoor Unit: RXS09/12LVJU SiUS091133 4. Outdoor Unit: RXS09/12LVJU Removal of Outer Panels / Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Appearance features (R7186) ...
  • Page 272 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points Remove the 3 screws Top panel and lift the top panel. (R16978) Remove the drip proof Drip proof cover cover. (R16980) Remove the 4 screws and remove the discharge grille. Discharge grille (R16981) Removal Procedure...
  • Page 273 Outdoor Unit: RXS09/12LVJU SiUS091133 Step Procedure Points  The discharge grille has 4 hooks. (R16982) Remove the 8 screws of the front panel. (R16983) Front panel  The front panel has 4 hooks. Unfasten the hooks. Pull and remove the front panel.
  • Page 274 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points  Nut size: M6 3. Remove the fan motor. Remove the nut of the outdoor fan. 10 mm (0.39 inch) (R16985) Outdoor fan (R16922)  When reassembling, align the Remove the outdoor fan. mark of the outdoor fan with the D-cut section of the motor shaft.
  • Page 275 Outdoor Unit: RXS09/12LVJU SiUS091133 Step Procedure Points Disconnect the connector for the fan motor [S70]. (R16987) [S70] Release the fan motor Fan motor lead wire from the hook. lead wire (R11832) Removal Procedure...
  • Page 276 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points Remove the screw and remove the fan motor fixing frame. Fan motor fixing frame (R11833) (R12314)  When reassembling, fit the lower hooks into the bottom frame. (R7206) Removal Procedure...
  • Page 277 Outdoor Unit: RXS09/12LVJU SiUS091133 Step Procedure Points  When reassembling, put the fan Open the 2 hooks and release the fan motor motor lead wire through the lead wire. back of the fan motor so as not to be entangled with the outdoor fan.
  • Page 278 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points Remove the 4 screws Right side panel on the right side panel. (R16990) Remove the screw near the stop valves. (R16991)  When reassembling, make sure Unfasten the hook on the rear side. to fit the hook.
  • Page 279 Outdoor Unit: RXS09/12LVJU SiUS091133 Step Procedure Points  When reassembling, make sure Lift up the right side panel and remove it. to fit the hook. Hook (R16992) Lift up the guard net Guard net and remove it. (R16993) Removal Procedure...

  • Page 280: Removal Of Electrical Box

    SiUS091133 Outdoor Unit: RXS09/12LVJU Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Disconnect the Preparation  Remove the outer panels and connector for the overload protector disconnect the connector for the...
  • Page 281 Outdoor Unit: RXS09/12LVJU SiUS091133 Step Procedure Points Disconnect the relay connector for the compressor. (R16927) Disconnect the connector for the electronic expansion valve coil [S20]. [S20] (R16928) Cut the clamp. (R16994) Removal Procedure...
  • Page 282 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points  Be careful not to lose the clip for Pull out the outdoor heat exchanger the thermistor. thermistor. Clip Outdoor heat exchanger thermistor (R16995) (R3264)  Be careful not to lose the clip for Release the discharge pipe thermistor.

  • Page 283: Removal Of Pcbs

    Outdoor Unit: RXS09/12LVJU SiUS091133 Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step  You can remove the main PCB 1. Remove the main PCB and the forced operation when you disconnect the lead button PCB.
  • Page 284 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points Release the 2 ground wires. Ground wire (R16998)  Be careful of a sharp protrusion Pull out the forced operation button PCB. at the back of the forced Disconnect the operation button PCB. connector [S110] to remove the forced operation button PCB.
  • Page 285 Outdoor Unit: RXS09/12LVJU SiUS091133 Step Procedure Points Release the harness. (R16934) Cut the clamps at the 2 locations. (R16935) Disconnect the connector for the filter PCB [S10]. [S10] (R16936) Removal Procedure...
  • Page 286 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points Disconnect the connector for the forced [S100] operation button PCB [S100]. (R16937) Disconnect the connector for the filter PCB [HL3] [HN3]. [HN3] [HL3] (R16938) Release the harnesses from the hook. (R16939) Removal Procedure...
  • Page 287 Outdoor Unit: RXS09/12LVJU SiUS091133 Step Procedure Points Release the harness for the outdoor temperature thermistor. (R11865) Remove the 6 screws. (R16940) Unfasten the 4 hooks and remove the main PCB. (R16999) Removal Procedure...
  • Page 288 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points  Refer to page 22 for detail. [S100] [S10] [HL3] [HN3]: filter PCB [S20]: electronic expansion valve coil [HN3] [HL3] [S40]: overload protector [S80] [S70]: fan motor [S80]: four-way valve coil [S90]: thermistors [S20] [S100]: forced operation button [S40]...
  • Page 289 Outdoor Unit: RXS09/12LVJU SiUS091133 Step Procedure Points Release the harnesses from the hook. (R16944) Release the harnesses from the 2 hooks. (R17001) Remove the screw. (R17002) Removal Procedure...
  • Page 290 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points Unfasten the 2 hooks. Filter PCB (R17003) Lift and pull out the filter PCB. (R17004)  Refer to page 22 for detail. Layout of the filter PCB (R16949) Removal Procedure...

  • Page 291: Removal Of Reactor / Partition Plate

    Outdoor Unit: RXS09/12LVJU SiUS091133 Removal of Reactor / Partition Plate Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the reactor. Preparation Reactor  Remove the outer panels Remove the screw and according to the “Removal of remove the reactor.
  • Page 292 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points 2. Remove the partition Partition plate plate. Remove the 2 screws. (R12273)  When reassembling, fit the The partition plate has 2 hooks on the lower lower hooks into the bottom side. Lift and pull the frame.

  • Page 293: Removal Of Sound Blankets

    Outdoor Unit: RXS09/12LVJU SiUS091133 Removal of Sound Blankets Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step  Since the piping ports are torn Remove the sound blanket (top).
  • Page 294 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points Pull out the sound blanket (inner). Sound blanket (inner) (R11887) Pull out the sound blanket (bottom). Sound blanket (bottom) (R11888) Removal Procedure...

  • Page 295: Removal Of Four-Way Valve

    Outdoor Unit: RXS09/12LVJU SiUS091133 Removal of Four-Way Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Pull out the electronic expansion valve coil. Electronic expansion valve coil (R7233) Remove the terminal...
  • Page 296 SiUS091133 Outdoor Unit: RXS09/12LVJU Step Procedure Points Disconnect the lead wires of the Red (U) compressor. Yellow (V) Blue (W) (R7235) Remove the screw and Four way valve coil remove the four-way Warning valve coil. Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.
  • Page 297 Outdoor Unit: RXS09/12LVJU SiUS091133 Step Procedure Points  Before working, make In case of difficulty with gas sure that the refrigerant brazing machine Four way valve gas is empty in the circuit. 1. Disconnect the brazed part  Be sure to apply nitrogen where is easy to disconnect and replacement when restore.

  • Page 298: Removal Of Compressor

    SiUS091133 Outdoor Unit: RXS09/12LVJU Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the 2 nuts of the compressor. Warning Be careful not to get yourself burnt with pipes and other parts that are heated by the gas brazing machine.
  • Page 299 Outdoor Unit: RXS09/12LVJU SiUS091133 Step Procedure Points Heat up the brazed part Note:  Never use a metal saw to cut of the suction side and disconnect it. pipes because the sawdust may enter the circuit.  When withdrawing the pipes, be careful not to pinch them firmly with pliers.

  • Page 300: Outdoor Unit: Rxs15/18Lvju

    SiUS091133 Outdoor Unit: RXS15/18LVJU 5. Outdoor Unit: RXS15/18LVJU Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step  Take care not to cut your finger Remove the 4 screws Top panel and remove the top...
  • Page 301 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points Remove the 6 screws of the front panel. Front panel (R16757) Unfasten the right side hooks. (R16759)  When reassembling, fit the left Unfasten the left side hooks. side of the front panel first. Remove the front panel.
  • Page 302 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points Remove the screw of the stop valve cover. Stop valve cover (R16761) Pull down the stop valve cover to unfasten the hooks and remove (R16762)  The stop valve cover has 6 hooks. (R16763) Removal Procedure...

  • Page 303: Removal Of Outdoor Fan / Fan Motor

    Outdoor Unit: RXS15/18LVJU SiUS091133 Removal of Outdoor Fan / Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the drip proof Preparation Drip proof cover ...
  • Page 304 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points (R16764) Release the fan motor lead wire from the groove and the 2 hooks of the partition plate. (R16796) (R16797)  Nut size: M6 Remove the nut of the Outdoor fan outdoor fan. 10 mm (0.39 inch) (R16985)
  • Page 305 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points  When reassembling, align the Remove the outdoor fan. mark of the outdoor fan with the D-cut section of the motor shaft. (R16788) Remove the 2 screws Fan motor fixing frame of the fan motor fixing frame.
  • Page 306 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points Open the hook and release the fan motor lead wire. Hook (R16954) Remove the 4 screws and remove the fan Fan motor motor. (R16792) Removal Procedure...

  • Page 307: Removal Of Electrical Box

    Outdoor Unit: RXS15/18LVJU SiUS091133 Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step  When reassembling, pass the Remove the 2 screws of the protection plate.
  • Page 308 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points Remove the 2 screws of the conduit mounting Conduit mounting plate plate. Remove the conduit mounting plate. (R16780) Remove the 2 screws and remove the ground wire. Ground wire (R16781) Pull out the outdoor temperature thermistor.
  • Page 309 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points Remove the 4 screws of the right side panel. Right side panel (R16957)  When reassembling, insert the Unfasten the hooks and Hook remove the right side upper hook and the 2 lower panel.
  • Page 310 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points Pull out the outdoor heat exchanger thermistor. Outdoor heat exchanger thermistor (R16819) Disconnect the connector for the fan [S70] motor [S70]. Ferrite core (R16951)  The ferrite core of the fan motor Release the clamp from the partition plate.
  • Page 311 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points (R16764) Release the fan motor lead wire from the groove and the 2 hooks of the partition plate. (R16796) (R16797) Disconnect the connector for the overload protector [S40]. (R16782) Removal Procedure...
  • Page 312 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points Pull out the clamp. (R16803) Disconnect the connector for the [S20] electronic expansion valve coil [S20]. (R16798) Pull out the clamp (2 locations). (R16799) Removal Procedure...
  • Page 313 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points (R16767) Remove the wire saddle. Wire saddle (R16800)  When reassembling, insert the Disconnect the connector for the four- clamps of harnesses as below. [S80] way valve coil [S80]. [S40] [S80] [S20] (R14363) ...
  • Page 314 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points Pull out the clamp. (R16802) Disconnect the relay connector for the compressor. (R14312) Release the harness of the relay connector from the wire saddle. (R14313) Pull out the clamp from the partition plate. (R16950) Removal Procedure...
  • Page 315 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points Disconnect the connector for the [S90] thermistors [S90]. (R16806)  When reassembling, pass the Pull out the clamp. thermistor harness under the harnesses (HL2: blue, HN2: white) from the filter PCB.  When reassembling, insert the clamp as below.
  • Page 316 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points  When reassembling, insert the 2 Pull out the clamp (3 locations). clamps into the bottom of the electrical box. (R16768) (R16749) (R16769) (R16770) Removal Procedure...
  • Page 317 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points Remove the screw. (R16771) Remove the electrical box. Electrical box (R16772) Removal Procedure...

  • Page 318: Removal Of Pcbs

    SiUS091133 Outdoor Unit: RXS15/18LVJU Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the main PCB. [S12]: for [HL4] [HN4] on filter PCB Disconnect the Main PCB [S12]...
  • Page 319 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points  The compressor harness has a Pull out the clamp. clamp. When reassembling, insert the clamp as below. (R16775) Compressor harness (red, blue, yellow) (R16747) Disconnect the [HL3]: for [HL2] on filter PCB [HL3]: blue connectors [HN3] and [HN3]: for [HN2] on filter PCB...
  • Page 320 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points Remove the 2 upper screws. (R16811) Remove the lower screw. (R16812) Lift the main PCB Main PCB ASSY ASSY. (R16813) Removal Procedure...
  • Page 321 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points Unfasten the 4 hooks at the bottom. (R16814) Remove the 8 screws. (R14330) 11 Unfasten the 2 hooks.  Refer to page 24 for detail. (R14331) 12 Remove the main PCB. [S10] [S12]: filter PCB [S80] [S70] [S20] [S40] [S90]...
  • Page 322 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points 2. Remove the radiation fin. Remove the 2 screws on the bottom of the electrical box. Electrical box (R14333) Remove the radiation fin. Radiation fin (R14334) 3. Remove the filter PCB. Remove the ground wire screw.
  • Page 323 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points Pull out the clamp. (R16816) Release the harnesses from the groove. (R16817) Remove the 2 screws. (R16818) Removal Procedure...
  • Page 324 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points Unfasten the 3 hooks of the filter PCB ASSY. (R16961) (R14367) Remove the screw. (R14368) Unfasten the 2 hooks. (R16964) Removal Procedure...
  • Page 325 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points  Refer to page 24 for detail. Remove the filter PCB. (R14370) Removal Procedure...

  • Page 326: Removal Of Sound Blankets / Thermistors

    SiUS091133 Outdoor Unit: RXS15/18LVJU Removal of Sound Blankets / Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the partition plate. Remove the 2 screws. (R16773) Remove the partition plate.
  • Page 327 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points 2. Remove the sound blankets. Remove the sound blanket (top upper). Sound blanket (top upper) (R16962) Remove the sound blanket (top lower). Sound blanket (top lower) (R16783) Remove the sound blanket (back). Sound blanket (back) Removal Procedure...
  • Page 328 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points  Since the piping ports are torn Remove the sound blanket (outer). easily, remove the sound Sound blanket blankets carefully. (outer) (R16776) Remove the sound blanket (inner). Sound blanket (inner) (R16778)  Be careful not to lose the clip for Release the discharge pipe thermistor.
  • Page 329 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points Cut the clamp and pull out the outdoor heat exchanger thermistor. Outdoor heat exchanger thermistor Clamp (R5292) Removal Procedure...

  • Page 330: Removal Of Four-Way Valve

    SiUS091133 Outdoor Unit: RXS15/18LVJU Removal of Four-Way Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the screw and remove the four-way Warning Four way Be careful not to get yourself valve coil.

  • Page 331: Removal Of Electronic Expansion Valve

    Outdoor Unit: RXS15/18LVJU SiUS091133 Removal of Electronic Expansion Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Pull out the electronic expansion valve coil. Electronic expansion valve coil (R16751) Remove the sheets of putty.
  • Page 332 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points  Before working, make sure that the refrigerant Electric expansion valve Warning gas is empty in the circuit. Use caution to avoid burning  Be sure to apply nitrogen yourself with pipes and other replacement when parts that are heated by the gas heating up the brazed...

  • Page 333: Removal Of Compressor

    Outdoor Unit: RXS15/18LVJU SiUS091133 Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the terminal cover. (R5301) Terminal cover (R5302) Disconnect the lead wires of the compressor.
  • Page 334 SiUS091133 Outdoor Unit: RXS15/18LVJU Step Procedure Points Remove the putty. (R16963) Remove the 2 nuts of the compressor. Warning Use caution to avoid burning yourself with pipes and other parts that are heated by the gas brazing Warning If the refrigerant gas leaks during work, immediately ventilate the room.
  • Page 335 Outdoor Unit: RXS15/18LVJU SiUS091133 Step Procedure Points Heat up the brazed part Cautions for restoration of the discharge side 1. Restore the piping by non- and disconnect it. oxidation brazing. 2. It is required to prevent the carbonization of the oil inside the four-way valve and the deterioration of the gaskets affected by heat.

  • Page 336: Outdoor Unit: Rxs24Lvju

    SiUS091133 Outdoor Unit: RXS24LVJU 6. Outdoor Unit: RXS24LVJU Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Appearance features (R16578)  The hooks are secured in the 2.
  • Page 337 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Remove the suction grille. (R6372) 3. Remove the top panel. Remove the 4 screws Top panel on the back and the screw on the left side. (R6373) Remove the 2 screws on the front and the screw on the right side panel.
  • Page 338 SiUS091133 Outdoor Unit: RXS24LVJU Step Procedure Points Lift the top panel and remove it. (R16580) 4. Remove the front panel (2). Front Panel (2) Remove the 5 screws. : This screw is M5(3) × 16  (R17006) Removal Procedure...
  • Page 339 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Slide the front panel (2) downward to unfasten the hook. (R16582) Remove the front panel (2). Hook (R16583) Removal Procedure...
  • Page 340 SiUS091133 Outdoor Unit: RXS24LVJU Step Procedure Points 5. Remove the right side Right side panel panel. Remove the 2 screws. Slide the right side panel downward to unfasten the 2 hooks on the rear side. (R16728) Hook (R13521) Hook (R16729) Removal Procedure...
  • Page 341 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Remove the right side panel. (R16730)  Remove the discharge grille and 6. Remove the front panel Front (1). the outdoor fan first to remove Panel (1) the front panel (1). Remove the 4 screws on the discharge grille.
  • Page 342 SiUS091133 Outdoor Unit: RXS24LVJU Step Procedure Points Slide the discharge grille downward to unfasten the 2 hooks at the top. Hook (R16591) Remove the discharge grille. (R16592)  Nut size : M8 Remove the nut of the outdoor fan. Outdoor fan 13 mm (0.51 inch) (R17005)
  • Page 343 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Remove the screw at Partition plate (1) the bottom left of the front. (R16738) Remove the screw at the bottom of the left side. (R16739) Remove the screw at the bottom of the rear side.
  • Page 344 SiUS091133 Outdoor Unit: RXS24LVJU Step Procedure Points Lift the front panel (1) to unfasten the hook. Hook (R16740) Remove the front panel (1). (R16741)  Be sure to detach the front panel (1) carefully so as not to deform it. (R6995) Removal Procedure...
  • Page 345 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points 7. Remove the rear panel. Remove the 2 screws, and remove the shield Rear panel plate ASSY. Shield plate ASSY (R16599) Release the clamps of the connection wire. (R17009) Remove the screws and detach the connection wires.
  • Page 346 SiUS091133 Outdoor Unit: RXS24LVJU Step Procedure Points Remove the screw on the partition plate (2). Rear panel Partition plate (2) (R17008) Slide the partition plate (2) to the left, and remove it. Hook (R17007) Remove the 3 screws on the wire fixing plate. (R17010) Removal Procedure...
  • Page 347 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Remove the wire fixing plate and the insulation. Wire fixing plate Insulation (R17011)  The holder is secured in the Release the holder of Holder the outdoor clearances of the outdoor heat temperature thermistor. exchanger fins.
  • Page 348 SiUS091133 Outdoor Unit: RXS24LVJU Step Procedure Points Remove the 3 screws on the rear panel. Rear panel (R16699) Remove the screw on the bottom frame. (R16700) Remove the screw on the stop valve mounting Stop valve mounting plate plate. (R16701) Removal Procedure...
  • Page 349 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Lift the rear panel upward to unfasten the 2 hooks. Hook Hook (R16702) Remove the rear panel. (R16703) Removal Procedure...

  • Page 350: Removal Of Electrical Box

    SiUS091133 Outdoor Unit: RXS24LVJU Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the screw on the stop valve mounting Electrical box plate.
  • Page 351 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Remove the 2 screws to detach the ground wires. Ground wire (R16607) Disconnect the connector for the fan motor [S70]. (R7008) : When reassembling, do not use Release the fan motor lead wire from the 5 these 2 hooks.
  • Page 352 SiUS091133 Outdoor Unit: RXS24LVJU Step Procedure Points Disconnect the [S20]: electronic expansion valve connectors of the front coil side. [S40]: overload protector [S80]: four-way valve coil [S90]: thermistors (R5275) The compressor lead wire is fixed on the partition plate (1) with a clamp.
  • Page 353 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Disconnect the relay connector for the compressor. (R6469) 10 Slide the electrical box to the left to unfasten the hook on the right side of the box. Hook (R16705) 11 Lift up the electrical box and remove it.

  • Page 354: Removal Of Pcbs

    SiUS091133 Outdoor Unit: RXS24LVJU Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Disconnect the Preparation [S102] [S52]  Remove the electrical box connectors [S52] [S102] from the service according to the "Removal of...
  • Page 355 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Unfasten the hook on the right. (R5283) Open the terminal board. (R16710) Disconnect the 1: Black harnesses from the 2: White terminal board. 3: Red L1: Black L2: Brown N1: White N2: Blue (R16711) Removal Procedure...
  • Page 356 SiUS091133 Outdoor Unit: RXS24LVJU Step Procedure Points Disconnect the 2 [HR1] : White harnesses for the [HR2] : Blue reactor [HR1] [HR2]. [HR1] [HR2] Ferrite core  The harness for [HR2] has a ferrite core. (R5286) Remove the 3 screws of the main PCB.

  • Page 357: Removal Of Fan Motor

    Outdoor Unit: RXS24LVJU SiUS091133 Removal of Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the 2 lower Preparation  Remove the electrical box screws first.

  • Page 358: Removal Of Coils / Thermistors

    SiUS091133 Outdoor Unit: RXS24LVJU Removal of Coils / Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the electronic expansion valve coil. Pull the electronic Electronic expansion expansion valve coil...
  • Page 359 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Remove the four-way valve coil. Four way valve coil (R6458) 3. Remove the thermistors. Pull out the outdoor Outdoor heat exchanger thermistor heat exchanger thermistor. (R11160) Slightly open the sound blanket (outer). Sound blanket (outer) (R7011) Removal Procedure...
  • Page 360 SiUS091133 Outdoor Unit: RXS24LVJU Step Procedure Points Remove the sound blanket (upper top). Sound blanket (upper top) (R7012) Remove the discharge pipe thermistor. Discharge pipe thermistor (R9469) Removal Procedure...

  • Page 361: Removal Of Sound Blankets

    Outdoor Unit: RXS24LVJU SiUS091133 Removal of Sound Blankets Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Open the sound blanket (outer). Sound blanket (outer) (R16608) ...
  • Page 362 SiUS091133 Outdoor Unit: RXS24LVJU Step Procedure Points Remove the screw and Partition plate (1) slightly push the partition plate (1) to the left for easy work. (R16610) Remove the sound blanket (outer). (R16611)  The sound blanket is fragile. Remove the sound blanket (top lower).
  • Page 363 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points Open the sound blanket (inner).  The sound blanket is fragile. Be careful of the notches of the compressor mount (3 locations). Sound blanket (inner) (R7018) Remove the sound blanket (inner). Sound blanket (inner) (R7019) Removal Procedure...

  • Page 364: Removal Of Compressor

    SiUS091133 Outdoor Unit: RXS24LVJU Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the terminal cover. Terminal cover (R9690) Pull out the 3 lead wires.
  • Page 365 Outdoor Unit: RXS24LVJU SiUS091133 Step Procedure Points  Disconnect the piping, referring Remove the 2 nuts. to page 381. (R9472) Removal Procedure...

  • Page 366: Outdoor Unit: Rks30/36Lvju, Rxs30/36Lvju

    SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU 7. Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Note: The illustrations are for heat pump models as representative. Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.
  • Page 367 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Step Procedure Points 3. Remove the top panel. Remove the 9 screws Top panel and remove the top panel. (R16620) 4. Remove the right side panel. Remove the 5 screws. Right side panel (R16621) Slide the right side panel downward to unfasten the 2 hooks on the back side.
  • Page 368 SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Step Procedure Points Hook (R16622) Remove the right side panel. (R16623) 5. Remove the front panel (2). Remove the screw. Front panel (2) (R16624) Removal Procedure...
  • Page 369 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Step Procedure Points Slide the front panel (2) downward to unfasten the 3 hooks. (R16625) (R16626)  The insulation sheet is inserted Remove the front panel (2). between the front panel (2) and the electrical box. Insulation sheet (R16627)
  • Page 370 SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Step Procedure Points  Remove the discharge grille and 6. Remove the front panel (1). the outdoor fan first to remove the front panel (1). Remove the 4 screws on the discharge grille. Discharge grille Front panel (1) (R9757) Pull the bottom of the...
  • Page 371 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Step Procedure Points Remove the 3 screws Partition plate (1) on the partition plate (1). (R16629) Remove the 2 screws at the bottom of the front. (R16630) Remove the screw at the bottom of the left side.
  • Page 372 SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Step Procedure Points Remove the screw at the bottom of the back side. (R9602) The front panel (1) has a hook on its front. Lift the front panel (1). Hook (R16631) Remove the front panel (1).
  • Page 373 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Step Procedure Points 7. Remove the rear panel. Cut the clamp. (R17015) Remove the 3 screws. (R17016) Remove the wire fixing Terminal board plate. Remove the 7 screws of the terminal board and ground wires. Detach the connection wires and the power Connecting wires...
  • Page 374 SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Step Procedure Points Remove the 2 screws on the partition plate (2). Rear panel Partition plate (2) (R17013) Lift up slightly and remove the partition plate (2). Partition plate (2) (R17014) Remove the screw on the bottom frame.
  • Page 375 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Step Procedure Points Remove the screw on Stop valve the stop valve mounting mounting plate plate. (R16638) Lift the rear panel upward to unfasten the 2 hooks. Hook (R16639) Push the hooks of the outdoor temperature thermistor holder from inner-side of the rear panel and detach it.
  • Page 376 SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Step Procedure Points Remove the rear panel. Rear panel (R16640) Removal Procedure...

  • Page 377: Removal Of Electrical Box

    Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the screw on the stop valve mounting plate.
  • Page 378 SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Step Procedure Points  When reassembling, insert each Disconnect the Ferrite core connector for fan motor clamp into the small hole. [S70] and release the 4 For the ferrite For the ferrite core clamps attached to the core of fan of electronic motor...
  • Page 379 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Step Procedure Points The compressor lead wire is fixed on the partition plate (1) with a clamp. Clamp (R9623) Pull out the clamp and release the compressor lead wire. Clamp (R9624) Disconnect the relay connector for the overload protector and the compressor.
  • Page 380 SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Step Procedure Points 10 Release the thermistor  When reassembling, insert Hook harness from the hook the clamp into the small hole. at the bottom of electrical box. 11 Pull out the clamp of the thermistor harness from the hole of the Fixing position for the electrical box.

  • Page 381: Removal Of Pcbs

    Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the cover. Preparation Cover  Remove the electrical box according to the “Removal of Electrical Box”.
  • Page 382 SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Step Procedure Points Remove the screws of the terminal board and the ground wire. Ground wire Terminal board (R16709) Unfasten the hook on the right. (R5283) Open the terminal board. (R5284) Disconnect the 1: Black harnesses.
  • Page 383 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Step Procedure Points Disconnect the 2 [HR1] : white harnesses for the [HR2] : blue [HR1] [HR2] Ferrite core  The harness for [HR2] has a reactor [HR1] [HR2]. ferrite core. (R5286) Remove the 3 screws of the main PCB.

  • Page 384: Removal Of Fan Motor

    SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Removal of Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Cut the clamps at 2 Preparation  Remove the electrical box locations.

  • Page 385: Removal Of Coils / Thermistors

    Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Removal of Coils / Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the electronic expansion valve coil. Pull the electronic expansion valve coil out.
  • Page 386 SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Step Procedure Points Remove the sound blanket (top upper). Sound blanket (top upper) (R16920) Remove the discharge pipe thermistor. Discharge pipe thermistor (R9635) At the back side, open the outdoor temperature thermistor holder. Outdoor temperature thermistor holder (R9636) Removal Procedure...
  • Page 387 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Step Procedure Points Release the outdoor temperature thermistor. Outdoor temperature thermistor (R9637) 3. Remove the four-way valve coil. Remove the screw. (R9638) Remove the four-way valve coil. (R9639) Four way valve coil Removal Procedure...

  • Page 388: Removal Of Sound Blankets

    SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Removal of Sound Blankets Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Open the sound blanket (outer). Sound blanket (outer) (R16921) ...
  • Page 389 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Step Procedure Points Remove the sound blanket (outer). Sound blanket (outer) (R9643) Open the sound blanket (inner). Sound blanket Compressor mount (inner) (R9644)  The sound blanket is fragile. Be Remove the sound blanket (inner). careful of the notches of the compressor mount (4 locations).

  • Page 390: Removal Of Compressor

    SiUS091133 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the terminal cover. Terminal cover (R9650)  U: red, V: yellow, W: blue Pull out the 3 lead wires.
  • Page 391 Outdoor Unit: RKS30/36LVJU, RXS30/36LVJU SiUS091133 Step Procedure Points  Before working, make sure that the refrigerant Warning gas is empty in the circuit. Use caution to avoid burning  Be sure to apply nitrogen yourself with pipes and other replacement when parts that are heated by the gas heating up the brazed brazing machine.

  • Page 392: Trial Operation And Field Settings

    SiUS091133 Part 8 Trial Operation and Field Settings 1. Pump Down Operation................383 2. Forced Cooling Operation ...............384 3. Trial Operation ..................386 4. Field Settings ..................387 4.1 Model Type Setting .................. 387 4.2 Temperature Display Switch ..............387 4.3 When 2 Units are Installed in 1 Room............388 4.4 Facility Setting Jumper and Switch (Cooling at Low Outdoor Temperature)............

  • Page 393: Pump Down Operation

    Pump Down Operation SiUS091133 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. Detail 1) Remove the valve caps from the liquid stop valve and the gas stop valve. 2) Carry out forced cooling operation.

  • Page 394: Forced Cooling Operation

    SiUS091133 Forced Cooling Operation 2. Forced Cooling Operation Item Forced Cooling Conditions The forced cooling operation is allowed when both of the following conditions are met. 1) The outdoor unit is not abnormal and not in the 3-minute standby mode. 2) The outdoor unit is not operating.
  • Page 395 Forced Cooling Operation SiUS091133 15/18 class Forced cooling operation [ON/OFF] button (SW1) Push Screwdriver (R16616) 24/30/36 class S102 LED-A Forced cooling operation ON/OFF button (SW1) (R14475) Trial Operation and Field Settings...

  • Page 396: Trial Operation

    SiUS091133 Trial Operation 3. Trial Operation Outline 1. Measure the supply voltage and make sure that it falls within the specified range. 2. Trial operation should be carried out in either cooling or heating operation. 3. Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as louver movement, are working properly.

  • Page 397: Field Settings

    Field Settings SiUS091133 4. Field Settings Model Type Setting  This remote controller is common to the heat pump model and cooling only model. Use the DIP switch on the remote controller to set the heat pump model or cooling only model. ...

  • Page 398: When 2 Units Are Installed In 1 Room

    SiUS091133 Field Settings When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different addresses. Both the indoor unit PCB and the wireless remote controller need alteration. ...

  • Page 399: Facility Setting Jumper And Switch (Cooling At Low Outdoor Temperature)

    Field Settings SiUS091133 Facility Setting Jumper and Switch (Cooling at Low Outdoor Temperature) Outline This function is limited only for facilities (the target of air conditioning is equipment such as computer. Never use it in spaces occupied by humans such as a residence or office. Detail You can expand the operation range to –10°C (14°F) by cutting the jumper or turning on switch on the outdoor unit PCB.

  • Page 400: Jumper Settings

    SiUS091133 Field Settings 24/30/36 class S102 LED-A Turn on the switch SW4-B. (R14478) Caution 1. If the outdoor unit is installed where the outdoor heat exchanger of the unit is exposed to direct wind, provide a windbreak wall. 2. Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off when using facility settings.

  • Page 401: Application Of Silicon Grease To A Power Transistor And A Diode Bridge391

    Application of Silicon Grease to a Power Transistor and a Diode Bridge SiUS091133 5. Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable All outdoor units using an inverter type compressor for room air conditioner. Models When the printed circuit board (PCB) of an outdoor unit is replaced, it is required that silicon grease (*1) be precisely applied to the heat radiation part (the contact point to the radiation fin) of the power transistor and the diode bridge.

  • Page 402: Appendix

    SiUS091133 Part 9 Appendix 1. Piping Diagrams..................393 1.1 Indoor unit ....................393 1.2 Outdoor Unit ..................... 396 2. Wiring Diagrams..................399 2.1 Indoor Unit....................399 2.2 Outdoor Unit ..................... 401 Appendix...

  • Page 403: Piping Diagrams

    Piping Diagrams SiUS091133 1. Piping Diagrams Indoor unit FTXS09/12LVJU INDOOR UNIT 1/4 CuT HEAT EXCHANGER THERMISTOR CROSS FLOW FAN ON HEAT EXCH. FIELD PIPING 1/4 CuT FAN MOTOR FIELD PIPING 3/8 CuT 3/8 CuT REFRIGERANT FLOW COOLING HEATING 4D074606 FTXS15/18LVJU INDOOR UNIT 5/16 CuT DISTRIBUTOR...
  • Page 404 SiUS091133 Piping Diagrams FTXS24LVJU INDOOR UNIT 5/16 CuT DISTRIBUTOR HEAT EXCHANGER THERMISTOR CROSS FLOW FAN ON HEAT EXCH. FIELD PIPING 1/4 CuT FAN MOTOR HEADER FIELD PIPING 5/8 CuT 1/2 CuT REFRIGERANT FLOW COOLING HEATING 4D074608 FTXS30/36LVJU INDOOR UNIT 5/16 CuT DISTRIBUTOR HEAT EXCHANGER THERMISTOR...
  • Page 405 Piping Diagrams SiUS091133 FDXS09/12LVJU INDOOR UNIT (1/4CuT) HEAT EXCHANGER THERMISTOR ON HEAT EXCH. FIELD PIPING (1/4CuT) SIROCCO FAN FAN MOTOR FIELD PIPING (3/8CuT) (3/8CuT) REFRIGERANT FLOW COOLING HEATING 4D074621 Appendix...

  • Page 406: Outdoor Unit

    SiUS091133 Piping Diagrams Outdoor Unit RXS09/12LVJU OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 9/32CuT 9/32CuT ELECTRONIC EXPANSION HEAT EXCHANGER VALVE THERMISTOR 3/16CuT 1/4CuT 1/4CuT MUFFLER 3/16CuT MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 3/8CuT MUFFLER WITH FILTER FOUR WAY FIELD PIPING VALVE ON : HEATING (1/4CuT)
  • Page 407 Piping Diagrams SiUS091133 RXS24LVJU OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE 5/16CuT THERMISTOR 5/16CuT HEADER 5/16CuT 5/16CuT 5/16CuT 5/16CuT 5/16CuT HEAT EXCHANGER (CONDENSER) 5/16CuT THERMISTOR ELECTRONIC RECEIVER EXPANSION 5/32CuT VALVE 5/16CuT 3/8CuT 3/8CuT 3/8CuT 3/8CuT 3/8CuT DISTRIBUTOR FILTER MUFFLER DC FAN MOTOR WITH FILTER CAPILLARY TUBE...
  • Page 408 SiUS091133 Piping Diagrams RXS30/36LVJU OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE 3/8CuT THERMISTOR 5/16CuT HEADER 5/16CuT 5/16CuT 5/16CuT 5/16CuT 5/16CuT HEAT EXCHANGER (CONDENSER) ELECTRONIC 5/16CuT THERMISTOR RECEIVER EXPANSION 5/16CuT VALVE 5/16CuT 5/32CuT 5/16CuT 5/16CuT 5/16CuT 3/8CuT 3/8CuT 3/8CuT 5/16CuT DISTRIBUTOR FILTER FILTER DC FAN MOTOR CAPILLARY TUBE...

  • Page 409: Wiring Diagrams

    Wiring Diagrams SiUS091133 2. Wiring Diagrams Indoor Unit FTXS09/12LVJU PCB3 PCB1 LED1 3.15A OUTDOOR C102 LED2 MR10 FIELD WIRING. LED3 C101 TRANSMISSION CAUTION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY t° IS TURNED OFF AND THEN BACK ON AGAIN. : BUZZER RTH1 C101, C102...
  • Page 410 SiUS091133 Wiring Diagrams FDXS09/12LVJU ® V1TR 3.15A OUTDOOR LED LED GRN/YLW FIELD WIRING. TERMINAL FOR CAUTION TRANSMISSION CENTRALIZED CONTROL CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK SIGNAL ON AGAIN. RECEIVER RTH1 H1P~H3P...

  • Page 411: Outdoor Unit

    Wiring Diagrams SiUS091133 Outdoor Unit RXS09/12LVJU FIELD WIRING INDOOR MRM20 IPM1 MRM10 – ~ – C119 – L L L MR30 ~ – – 3.15A – PCB2 3.15A W V U IPM2 ~ – – MRCW S100 PCB1 X11A 7 10 OUTDOOR NOTE 1.
  • Page 412 SiUS091133 Wiring Diagrams RXS24LVJU FU3 7 MRM20 3.15A V100 POWER SUPPLY MRM10 6(P) 7(N) TO INDOOR UNIT X11A V MS 3.15A MR30 PCB1 SHEET METAL S101 INDOOR FIELD WIRING t˚ t˚ t˚ S102 PCB2 (OUTDOOR) (DISCHARGE) LED A (CONDENSER) OUTDOOR Z1C~Z6C : FERRITE CORE X1M, X2M...
  • Page 413 Wiring Diagrams SiUS091133 Appendix...
  • Page 414 2011 Daikin Industries, LTD. © Daikin, Daikin AC Absolute Comfort and its design, VRV, REFNET, and Quaternity, Daikin Altherma are trademarks of Daikin Industries, LTD. Organization: All of the Daikin Group’s business Organization: DAIKIN INDUSTRIES, LTD.

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