Daikin FLKS25BAVMB Service Manual
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Daikin FLKS25BAVMB Service Manual

Inverter pair floor/ceiling suspended dual type ba series
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See also: Operating Manual , Installation Manual
Service
Manual
Inverter Pair
Floor/Ceiling Suspended Dual Type
BA-Series
[Applied Models]
 Inverter Pair: Cooling only
 Inverter Pair: Heat Pump
SiENBE05-722_A
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Summary of Contents for Daikin FLKS25BAVMB

  • Page 1 SiENBE05-722_A Service Manual Inverter Pair Floor/Ceiling Suspended Dual Type BA-Series [Applied Models]  Inverter Pair: Cooling only  Inverter Pair: Heat Pump...
  • Page 2 SiENBE05-722_A Service Manual Inverter Pair Floor/Ceiling Suspended Dual Type BA-Series [Applied Models]  Inverter Pair: Cooling only  Inverter Pair: Heat Pump...
  • Page 3 SiENBE05-722_A Inverter Pair Floor / Ceiling Suspended Dual Type BA-Series Cooling Only Indoor Unit FLKS25BAVMB FLKS35BAVMB Outdoor Unit RKS25E2V1B RKS25G2V1B RKS25G2V1B9 RKS35E2V1B RKS35G2V1B RKS35G2V1B9 Heat Pump Indoor Unit FLXS25BAVMB FLXS35BAVMB Outdoor Unit RXS25E2V1B RXS25G2V1B RXS25G2V1B9 RXS35E2V1B RXS35G2V1B RXS35G2V1B9 Table of Contents...

  • Page 4: Table Of Contents

    SiENBE05-722_A 1. Introduction .....................v 1.1 Safety Cautions ..................v 1.2 Used Icons ....................ix Part 1 List of Functions ..............1 1. Functions....................2 Part 2 Specifications ..............5 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................9 Part 3 Printed Circuit Board Connector Wiring Diagram ... 12 1.
  • Page 5 SiENBE05-722_A Part 5 Operation Manual ............. 49 1. System Configuration................50 2. Operation Manual..................51 2.1 Remote Control ..................51 2.2 Auto Dry Cool Heat Fan Operation ............52 2.3 Adjusting the Airflow Direction..............54 2.4 POWERFUL Operation ................56 2.5 OUTDOOR UNIT QUIET Operation............57 2.6 HOME LEAVE Operation ...............58 2.7 TIMER Operation ...................60 Part 6 Service Diagnosis.............
  • Page 6 SiENBE05-722_A 1.5 Removal of Discharge Grille..............120 1.6 Removal of Drain Pan ................121 1.7 Removal of Electrical Box / PCB ............122 1.8 Removal of Fan Rotor / Fan Motor............125 1.9 Removal of Indoor Heat Exchanger .............127 2. Outdoor Unit - RK(X)S25/35E2V1B ............129 2.1 Removal of Outer Panels / Fan Motor..........129 2.2 Removal of Electrical Box ..............137 2.3 Removal of PCB...................141...

  • Page 7: Introduction

    Introduction SiENBE05-722_A 1. Introduction Safety Cautions „ Be sure to read the following safety cautions before conducting repair work. Cautions and „ The caution items are classified into “ Warnings Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 8 SiENBE05-722_A Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety measures may cause a fall accident. In case of R-410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R-410A refrigerant.
  • Page 9 Introduction SiENBE05-722_A 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.
  • Page 10 SiENBE05-722_A Introduction Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug has dust or loose connection, it may cause an electrical shock or fire. Be sure to install the product correctly by using the provided standard For unitary type installation frame.

  • Page 11: Used Icons

    Introduction SiENBE05-722_A Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause the water to enter the room and wet the furniture and floor.

  • Page 12: Part 1 List Of Functions

    SiENBE05-722_A Part 1 List of Functions 1. Functions....................2 List of Functions...

  • Page 13: Functions

    Functions SiENBE05-722_A 1. Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter Function Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 14 SiENBE05-722_A Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter Function Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) — — —...
  • Page 15 Functions SiENBE05-722_A Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter Function Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) — — —...

  • Page 16: Part 2 Specifications

    SiENBE05-722_A Part 2 Specifications 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................9 Specifications...

  • Page 17: Specifications

    Specifications SiENBE05-722_A 1. Specifications Cooling Only 50 Hz, 220 - 230 - 240 V Indoor Units FLKS25BAVMB FLKS35BAVMB Model Outdoor Units RKS25E2V1B RKS35E2V1B 2.5 (1.2 ~ 3.0) 3.5 (1.2 ~ 3.8) Capacity Btu/h 8,500 (4,100 ~ 10,200) 11,900 (4,100 ~ 13,000) Rated (Min.
  • Page 18 SiENBE05-722_A Specifications 50 Hz, 220 - 230 - 240 V Indoor Units FLKS25BAVMB FLKS35BAVMB Model Outdoor Units RKS25G2V1B RKS35G2V1B 2.5 (1.2 ~ 3.0) 3.5 (1.2 ~ 3.8) Capacity Btu/h 8,500 (4,100 ~ 10,200) 11,900 (4,100 ~ 13,000) Rated (Min. ~ Max.)
  • Page 19 Specifications SiENBE05-722_A 50 Hz, 220 - 230 - 240 V Indoor Units FLKS25BAVMB FLKS35BAVMB Model Outdoor Units RKS25G2V1B9 RKS35G2V1B9 2.5 (1.2 ~ 3.0) 3.5 (1.2 ~ 3.8) Capacity Btu/h 8,500 (4,100 ~ 10,200) 11,900 (4,100 ~ 13,000) Rated (Min. ~ Max.)

  • Page 20: Heat Pump

    SiENBE05-722_A Specifications Heat Pump 50 Hz, 220 - 230 - 240 V Indoor Units FLXS25BAVMB FLXS35BAVMB Model RXS25E2V1B RXS35E2V1B Outdoor Units Cooling Heating Cooling Heating 2.5 (1.2 ~ 3.0) 3.4 (1.2 ~ 4.5) 3.5 (1.2 ~ 3.8) 4.0 (1.2 ~ 5.0) Capacity Btu/h 8,500 (4,100 ~ 10,200)
  • Page 21 Specifications SiENBE05-722_A 50 Hz, 220 - 230 - 240 V Indoor Units FLXS25BAVMB FLXS35BAVMB Model RXS25G2V1B RXS35G2V1B Outdoor Units Cooling Heating Cooling Heating 2.5 (1.2 ~ 3.0) 3.4 (1.2 ~ 4.5) 3.5 (1.2 ~ 3.8) 4.0 (1.2 ~ 5.0) Capacity Btu/h 8,500 (4,100 ~ 10,200) 11,600 (4,100 ~ 15,400)
  • Page 22 SiENBE05-722_A Specifications 50 Hz, 220 - 230 - 240 V Indoor Units FLXS25BAVMB FLXS35BAVMB Model RXS25G2V1B9 RXS35G2V1B9 Outdoor Units Cooling Heating Cooling Heating 2.5 (1.2 ~ 3.0) 3.4 (1.2 ~ 4.5) 3.5 (1.2 ~ 3.8) 4.0 (1.2 ~ 5.0) Capacity Btu/h 8,500 (4,100 ~ 10,200) 11,600 (4,100 ~ 15,400)

  • Page 23: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiENBE05-722_A Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........13 1.1 Indoor Unit....................13 1.2 Outdoor Unit ...................15 Printed Circuit Board Connector Wiring Diagram...

  • Page 24: Printed Circuit Board Connector Wiring Diagram

    SiENBE05-722_A Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors and PCB (1): Control PCB Other Parts 1) S6 Connector for swing motor (horizontal swing) 2) S7 Connector for AC fan motor 3) S21 Connector for centralized control (HA) 4) S24 Connector for display PCB...
  • Page 25 Printed Circuit Board Connector Wiring Diagram SiENBE05-722_A PCB Detail PCB (1) : Control PCB LED A 2P084352-3 PCB (2) : Power Supply PCB 2P084361-1 PCB (3) : Display PCB PCB (4) : Signal Receiver PCB LED3 LED2 LED1 EX511 REV 12 2P084377-5 PHOTO 2P084377-...

  • Page 26: Outdoor Unit

    SiENBE05-722_A Printed Circuit Board Connector Wiring Diagram Outdoor Unit 1.2.1 RK(X)S25/35E2V1B Connectors and PCB (1): Filter PCB Other Parts 1) S11 Connector for main PCB 2) HL1, HN1, S Connector for terminal board 3) E Terminal for earth 4) HC1, HC2 Connector for main PCB HL2, HN2 5) HR1...
  • Page 27 Printed Circuit Board Connector Wiring Diagram SiENBE05-722_A PCB Detail PCB (1): Filter PCB V2 FU3 3P143310-1 PCB (2): Main PCB LED A 2P143284-6 Printed Circuit Board Connector Wiring Diagram...
  • Page 28 SiENBE05-722_A Printed Circuit Board Connector Wiring Diagram 1.2.2 RK(X)S25/35G2V1B Connectors and PCB (1): Filter PCB Other Parts 1) S11 Connector for main PCB 2) HL1, HN1, S Connector for terminal board 3) E1 Terminal for earth 4) E2 Connector for terminal board (earth) 5) HL2, HN2 Connector for main PCB 6) HR1...
  • Page 29 Printed Circuit Board Connector Wiring Diagram SiENBE05-722_A PCB Detail PCB (1): Filter PCB HL1 HN1 S (on main PCB) 3P203203-1 PCB (2): Main PCB LED A 2P203198-1 Printed Circuit Board Connector Wiring Diagram...
  • Page 30 SiENBE05-722_A Printed Circuit Board Connector Wiring Diagram 1.2.3 RK(X)S25/35G2V1B9 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 earth 4) HL2, HN2 Connector for main PCB 5) HR1 Connector for reactor...
  • Page 31 Printed Circuit Board Connector Wiring Diagram SiENBE05-722_A PCB Detail PCB (1): Filter PCB E1, E2 (on main PCB) 3P254234-1 PCB (2): Main PCB U VW J5 J4 S90 LED A S100 S50 2P254206-1 PCB (3): Forced Operation Button PCB S110 3P255755-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 32: Part 4 Function And Control

    SiENBE05-722_A Part 4 Function and Control 1. Main Functions..................22 1.1 Temperature Control ................22 1.2 Frequency Principle................22 1.3 Airflow Direction Control.................24 1.4 Fan Speed Control for Indoor Units............25 1.5 Program Dry Operation ................26 1.6 Automatic Operation................27 1.7 Thermostat Control.................28 1.8 NIGHT SET Mode ..................29 1.9 HOME LEAVE Operation ...............30 1.10 Inverter POWERFUL Operation .............31 1.11 Other Functions..................32...

  • Page 33: Main Functions

    Main Functions SiENBE05-722_A 1. Main Functions Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures Š Room temperature: temperature of the lower part of the room Š Set temperature: temperature set by remote control Š Room thermistor temperature: temperature detected by room temperature thermistor Š...
  • Page 34 SiENBE05-722_A Main Functions Drawing of The following drawing shows a schematic view of the inverter principle: Inverter Refrigerant circulation rate (high) high speed Amount of heat Amount of heat exchanged air (large) exchanged air (large) high f low f Amount of heat Amount of heat exchanged air (small) exchanged air (small)

  • Page 35: Airflow Direction Control

    Main Functions SiENBE05-722_A Airflow Direction Control Auto-Swing The following table explains the auto-swing process for cooling, dry, fan, and heating: up and down cooling / dry / fan heating ceiling (R2964) (R2963) floor (R2967) (R2966) Function and Control...

  • Page 36: Fan Speed Control For Indoor Units

    SiENBE05-722_A Main Functions Fan Speed Control for Indoor Units 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 37: Program Dry Operation

    Main Functions SiENBE05-722_A 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 adjustment buttons are inoperable in this mode. Detail The microcomputer automatically sets the temperature and airflow rate.

  • Page 38: Automatic Operation

    SiENBE05-722_A Main Functions Automatic Operation Outline Automatic Cooling / Heating Function When the AUTO mode is selected with the remote control, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up, and automatically operates in that mode. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.

  • Page 39: Thermostat Control

    Main Functions SiENBE05-722_A Thermostat Control Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Thermostat OFF Condition Š The temperature difference is in the zone A. Thermostat ON Condition Š The temperature difference returns to the zone C after being in the zone A. Š...

  • Page 40: Night Set Mode

    SiENBE05-722_A 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 41: Home Leave Operation

    Main Functions SiENBE05-722_A HOME LEAVE Operation Outline HOME LEAVE operation is a function that allows you to record your favorite set temperature and airflow rate. You can start your favorite operation mode simply by pressing the [HOME LEAVE] button on the remote control. Detail 1.

  • Page 42: Inverter Powerful Operation

    SiENBE05-722_A Main Functions 1.10 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Detail When POWERFUL button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.

  • Page 43: Other Functions

    Main Functions SiENBE05-722_A 1.11 Other Functions 1.11.1 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 either the airflow is stopped or is made very weak thereby carrying out comfortable heating of the room.

  • Page 44: Function Of Thermistor

    SiENBE05-722_A Function of Thermistor 2. Function of Thermistor Cooling Only Electronic expansion valve Compressor (R11611) Heat Pump Electronic expansion valve Four way valve Compressor (R11591) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge pipe Exchanger temperature.

  • Page 45: Control Specification

    Control Specification SiENBE05-722_A 3. Control Specification Mode Hierarchy Outline There are two modes; the one is the normal operation mode and the other is the forced operation mode for installation and providing service. Detail For Cooling Only Model There are following modes; stop and cooling (including drying). Air conditioner control mode Forced operating mode Forced cooling (for Pump Down Operation)

  • Page 46: Frequency Control

    SiENBE05-722_A Control Specification 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 47 Control Specification SiENBE05-722_A 2. Determine upper limit frequency Š 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 48: Controls At Mode Changing / Start-Up

    SiENBE05-722_A Control Specification 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. „ RK(X)S25/35E2V1B, RK(X)S25/35G2V1B Detail ON Condition Š...

  • Page 49: Compressor Protection Function

    Control Specification SiENBE05-722_A 3.3.2 Four Way Valve Switching Outline In heating operation, current is conducted, and in cooling and defrosting, current is not conducted. In order to eliminate the switching sound when the heating is stopped, as the four way valve coil switches from ON to OFF, the OFF delay switch of the four way valve is carried out after the operation stopped.

  • Page 50: Discharge Pipe Temperature Control

    SiENBE05-722_A Control Specification Discharge Pipe Temperature Control Outline The discharge pipe temperature is used as the internal temperature of the compressor. If the discharge pipe temperature rises above a certain level, the upper limit of frequency is set to keep this temperature from going up further. Detail Stop zone °C...

  • Page 51: Input Current Control

    Control Specification SiENBE05-722_A Input Current Control Outline The microcomputer calculates the input current during the compressor is running, and sets the frequency upper limit from the input current. In case of heat pump model, this control which is the upper limit control of the frequency takes priority to the lower limit of control of four way valve operation compensation.

  • Page 52: Freeze-Up Protection Control

    SiENBE05-722_A 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 53: Outdoor Fan Control

    Control Specification SiENBE05-722_A Outdoor Fan Control 1. Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops. 2. 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.

  • Page 54: Defrost Control

    SiENBE05-722_A 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 is determined with the outdoor temperature and the outdoor heat exchanger temperature.

  • Page 55: Electronic Expansion Valve Control

    Control Specification SiENBE05-722_A 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 56 SiENBE05-722_A 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 Equalization Control When the compressor is stopped, the pressure equalization control is activated. The electronic expansion valve opens, and develops the pressure equalization.
  • Page 57 Control Specification SiENBE05-722_A Detail When the starting control (cooling : seconds, heating : seconds) finishes, the detection timer for disconnection of the discharge pipe thermistor ( seconds) starts. When the timer is over, the following adjustment is made. 1. When the operation mode is cooling When the following condition is fulfilled, the discharge pipe thermistor disconnection is ascertained.

  • Page 58: Malfunctions

    SiENBE05-722_A 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 59: Forced Operation Mode

    Control Specification SiENBE05-722_A 3.13 Forced Operation Mode Outline Forced operation mode includes only forced cooling. Detail Item Forced Cooling Conditions 1) The outdoor unit is not abnormal and not in the 3-minute standby mode. 2) The outdoor unit is not operating. The forced operation is allowed when the above both conditions are met.

  • Page 60: Part 5 Operation Manual

    SiENBE05-722_A Part 5 Operation Manual 1. System Configuration................50 2. Operation Manual..................51 2.1 Remote Control ..................51 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........52 2.3 Adjusting the Airflow Direction..............54 2.4 POWERFUL Operation ................56 2.5 OUTDOOR UNIT QUIET Operation............57 2.6 HOME LEAVE Operation ...............58 2.7 TIMER Operation ...................60 Operation Manual...

  • Page 61: System Configuration

    System Configuration SiENBE05-722_A 1. System Configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know a clever method of using it.

  • Page 62: Operation Manual

    SiENBE05-722_A Operation Manual 2. Operation Manual Remote Control „ Remote control < > ARC433B67, B68 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. 2. Display: (AUTO/DRY/COOL/HEAT/FAN) • It displays the current settings.

  • Page 63: Auto Dry Cool Heat Fan Operation

    Operation Manual SiENBE05-722_A Auto 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. „ To start operation 1.
  • Page 64 SiENBE05-722_A Operation Manual „ To change the airflow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode The airflow rate setting is not variable Five levels of airflow rate setting from “ “...

  • Page 65: Adjusting The Airflow Direction

    Operation Manual SiENBE05-722_A Adjusting the Airflow Direction You can adjust the airflow direction to increase your comfort. „ To adjust the horizontal blade (flap) 1. Press “SWING button”. • “ ” is displayed on the LCD and the flaps will begin to swing. 2.
  • Page 66 SiENBE05-722_A Operation Manual „ To adjust the vertical blades (louvers) • When adjusting the louver, use a robust and stable stool and watch your steps carefully. Hold the knob and move the louvers. (You will find a knob on the left side and the right side blades.) Notes on flap and louvers angles.

  • Page 67: Powerful Operation

    Operation Manual SiENBE05-722_A POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity „ To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used before POWERFUL operation.

  • Page 68: Outdoor Unit Quiet Operation

    SiENBE05-722_A Operation Manual 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. „ To start OUTDOOR UNIT QUIET operation 1.

  • Page 69: Home Leave Operation

    Operation Manual SiENBE05-722_A HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. „ To start HOME LEAVE operation 1. Press “HOME LEAVE button”. • The HOME LEAVE lamp lights up. 1, 2 „...
  • Page 70 SiENBE05-722_A Operation Manual „ What’s the HOME LEAVE operation Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and air flow rate.

  • Page 71: Timer Operation

    Operation Manual SiENBE05-722_A 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 72 SiENBE05-722_A Operation Manual „ To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press “ON TIMER button”. 6:00 is displayed. • • “ ”blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.

  • Page 73: Part 6 Service Diagnosis

    SiENBE05-722_A Part 6 Service Diagnosis 1. Caution for Diagnosis................63 1.1 Troubleshooting with LED ..............63 2. Problem Symptoms and Measures ............64 2.1 ARC433 Series..................65 3. Troubleshooting ..................68 3.1 Error Codes and Description ..............68 3.2 Indoor Unit PCB Abnormality ..............69 3.3 Freeze-up Protection Control or Heating Peak-cut Control....70 3.4 Fan Motor (AC Motor) or Related Abnormality........72 3.5 Thermistor or Related Abnormality (Indoor Unit)........73 3.6 Signal Transmission Error (between Indoor Unit and Outdoor Unit) ..74...

  • Page 74: Caution For Diagnosis

    SiENBE05-722_A Caution for Diagnosis 1. Caution for Diagnosis Troubleshooting with LED Indoor Unit 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 75: Problem Symptoms And Measures

    Problem Symptoms and Measures SiENBE05-722_A 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page The units does not operate. Check the power supply. Check to make sure that the rated voltage is — supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...

  • Page 76: Arc433 Series

    SiENBE05-722_A Problem Symptoms and Measures ARC433 Series Check Method 1 1. When the timer cancel button is held down for 5 seconds, “00” indication appears on the temperature display section. TIMER CANCEL button < ARC433 Series > (R11949) 2. Press the timer cancel button repeatedly until a long beep sounds. „...
  • Page 77 Problem Symptoms and Measures SiENBE05-722_A Check Method 2 1. Press the center of the TEMP button and the MODE button at the same time. (R4272) The figure of the ten’s place blinks. (R4273) s or t button and change the figure until you hear the sound of “beep” or 2.
  • Page 78 SiENBE05-722_A Problem Symptoms and Measures s or t button and change the figure until you hear the sound of “beep”. 5. Press the TEMP (R4277) 6. Diagnose by the sound. H“pi” : The figure of the ten’s place does not accord with the error code. H“pi pi”...

  • Page 79: Troubleshooting

    Troubleshooting SiENBE05-722_A 3. Troubleshooting Error Codes and Description Reference Error Codes Description Page System Normal — 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 80: Indoor Unit Pcb Abnormality

    SiENBE05-722_A Troubleshooting Indoor Unit PCB Abnormality Remote Control Display Method of Evaluation of zero-cross detection of power supply by the indoor unit PCB. Malfunction Detection Malfunction There is no zero-cross detection in approximately 10 seconds. Decision Conditions „ Wrong models interconnected Supposed „...

  • Page 81: Freeze-Up Protection Control Or Heating Peak-Cut Control

    Troubleshooting SiENBE05-722_A Freeze-up Protection Control or Heating Peak-cut Control Remote Control 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 82 SiENBE05-722_A Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.06 Refer to P.105 Check the air passage. Is there any short circuit? Provide sufficient air passage. Check the air filter.

  • Page 83: Fan Motor (Ac Motor) Or Related Abnormality

    Troubleshooting SiENBE05-722_A Fan Motor (AC Motor) or Related Abnormality Remote Control 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 Decision is less than 50% of the maximum fan motor rotation speed.

  • Page 84: Thermistor Or Related Abnormality (Indoor Unit)

    SiENBE05-722_A Troubleshooting Thermistor or Related Abnormality (Indoor Unit) C4, C9 Remote Control 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 85: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    Troubleshooting SiENBE05-722_A Signal Transmission Error (between Indoor Unit and Outdoor Unit) Remote Control Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is Malfunction checked whether it is normal. Detection Malfunction The data sent from the outdoor unit cannot be received normally, or the content of the data is Decision abnormal.

  • Page 86: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiENBE05-722_A Troubleshooting Unspecified Voltage (between Indoor Unit and Outdoor Unit) Remote Control Display Method of The supply power is detected for its requirements (different from pair type and multi type) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction The pair type and multi type are interconnected.

  • Page 87: Outdoor Unit Pcb Abnormality

    Troubleshooting SiENBE05-722_A Outdoor Unit PCB Abnormality Remote Control Display „ The system follows the microprocessor program as specified. Method of „ The system checks to see if the zero-cross signal comes in properly. Malfunction Detection „ The microprocessor program runs out of control. Malfunction „...

  • Page 88: Ol Activation (Compressor Overload)

    SiENBE05-722_A Troubleshooting OL Activation (Compressor Overload) Remote Control Display Method of A compressor overload is detected through compressor OL. Malfunction Detection „ If the error repeats twice, the system is shut down. Malfunction „ Reset condition: Continuous run for about 60 minutes without any other error Decision ∗...

  • Page 89: Compressor Lock

    Troubleshooting SiENBE05-722_A 3.10 Compressor Lock Remote Control Display Method of A compressor lock is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection „ Operation stops due to overcurrent. Malfunction „ If the error repeats 16 times, the system is shut down. Decision „...

  • Page 90: Dc Fan Lock

    SiENBE05-722_A Troubleshooting 3.11 DC Fan Lock Remote Control 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 ~ 60 seconds (depending on the model) even when the fan Malfunction Decision motor is running.

  • Page 91: Input Overcurrent Detection

    Troubleshooting SiENBE05-722_A 3.12 Input Overcurrent Detection Remote Control Display Method of An input overcurrent is detected by checking the input current value with the compressor Malfunction running. Detection „ The following current with the compressor running continues for 2.5 seconds. Malfunction Decision Cooling / Heating: Above 9.25 A (Refer to “Input current control”...

  • Page 92: Four Way Valve Abnormality

    SiENBE05-722_A Troubleshooting 3.13 Four Way Valve Abnormality Remote Control Display Method of The room temperature thermistor, the indoor heat exchanger thermistor, the outdoor Malfunction temperature thermistor, and the outdoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode. Detection Malfunction A following condition continues over 10 minutes after operating for 5 minutes.
  • Page 93 Troubleshooting SiENBE05-722_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.05 Four way valve Refer to P.104 coil disconnected (loose)? Correct it. Check No.06 Refer to P.105 Harness out of connector? Reconnect it.

  • Page 94: Discharge Pipe Temperature Control

    SiENBE05-722_A Troubleshooting 3.14 Discharge Pipe Temperature Control Remote Control 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 Malfunction °C, the Decision compressor stops.

  • Page 95: High Pressure Control In Cooling

    Troubleshooting SiENBE05-722_A 3.15 High Pressure Control in Cooling Remote Control Display Method of High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if Malfunction the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection „...

  • Page 96: Compressor System Sensor Abnormality

    SiENBE05-722_A Troubleshooting 3.16 Compressor System Sensor Abnormality Remote Control 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 97: Position Sensor Abnormality

    Troubleshooting SiENBE05-722_A 3.17 Position Sensor Abnormality Remote Control Display Method of A compressor start-up failure is detected by checking the compressor running condition through Malfunction the position detection circuit. Detection „ If the error repeats, the system is shut down. Malfunction „...
  • Page 98 SiENBE05-722_A Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.29 Refer to P.110 Turn off the power. Check the power supply voltage. Correct the power supply. Voltage as rated? Check No.

  • Page 99: Dc Voltage / Current Sensor Abnormality

    Troubleshooting SiENBE05-722_A 3.18 DC Voltage / Current Sensor Abnormality Remote Control Display Method of DC voltage or DC current sensor abnormality is identified based on the compressor running Malfunction frequency and the input current. Detection „ The compressor running frequency is above 52 Hz. Malfunction „...

  • Page 100: Thermistor Or Related Abnormality (Outdoor Unit)

    SiENBE05-722_A Troubleshooting 3.19 Thermistor or Related Abnormality (Outdoor Unit) H9, J3, J6, P4 Remote Control 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 101 Troubleshooting SiENBE05-722_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.06 Turn on the power again. Refer to P.105 Error displayed Reconnect the connectors again on remote control? or thermistors.

  • Page 102: Electrical Box Temperature Rise

    SiENBE05-722_A Troubleshooting 3.20 Electrical Box Temperature Rise Remote Control 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 Malfunction °C.
  • Page 103 Troubleshooting SiENBE05-722_A Troubleshooting RK(X)S25/35E2V1B models Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.06 WARNING Turn off the power and turn it on Refer to P.105 again. To cool the electrical components, the outdoor fan starts when the radiation fin temperature rises above...
  • Page 104 SiENBE05-722_A Troubleshooting Troubleshooting RK(X)S25/35G2V1B, RK(X)S25/35G2V1B9 models Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.07 Turn off the power and turn it on WARNING Refer to P.106 again. To cool the electrical components, the outdoor fan starts when the radiation fin temperature rises...

  • Page 105: Radiation Fin Temperature Rise

    Troubleshooting SiENBE05-722_A 3.21 Radiation Fin Temperature Rise Remote Control 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 Malfunction °C.
  • Page 106 SiENBE05-722_A Troubleshooting Troubleshooting RK(X)S25/35E2V1B models Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.06 Turn off the power and turn it on Refer to P.105 again to start the system. Check No.07 Refer to P.106 Error displayed again?
  • Page 107 Troubleshooting SiENBE05-722_A Troubleshooting RK(X)S25/35G2V1B, RK(X)S25/35G2V1B9 models Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.07 Turn off the power and turn it on Refer to P.106 again to start the system. Check No.09 Refer to P.107 Error displayed again?

  • Page 108: Output Overcurrent Detection

    SiENBE05-722_A Troubleshooting 3.22 Output Overcurrent Detection Remote Control 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 109 Troubleshooting SiENBE05-722_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. ∗ An output overcurrent signal may result from wrong internal wiring. If the wires have been Check No.07 disconnected and reconnected and the system is interrupted by an output overcurrent, take the following procedure.

  • Page 110: Refrigerant Shortage

    SiENBE05-722_A Troubleshooting 3.23 Refrigerant Shortage Remote Control 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 smaller than the normal value. Detection Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of...
  • Page 111 Troubleshooting SiENBE05-722_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Refer to P.103 Any thermistor disconnected? Replace them in position. ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗...

  • Page 112: Low-Voltage Detection Or Over-Voltage Detection

    SiENBE05-722_A Troubleshooting 3.24 Low-voltage Detection or Over-voltage Detection Remote Control Display Method of Low-voltage detection: Malfunction An abnormal voltage drop is detected by the DC voltage detection circuit. Detection Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit. Malfunction Low-voltage detection: „...
  • Page 113 Troubleshooting SiENBE05-722_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the supply voltage. Supply voltage as specified? Correct the power supply. Rotate the fan by hand. Does the fan Replace the fan motor or rotate smoothly? the outdoor unit PCB.

  • Page 114: Check

    SiENBE05-722_A Check 4. Check How to Check 4.1.1 Electronic Expansion Valve Check Check No.04 Conduct the followings to check the electronic expansion valve (EV). 1. Check to see if the EV connector is correctly connected to the PCB. 2. Turn the power off and on again, and check to see if the EV generate latching sound. 3.

  • Page 115: Four Way Valve Performance Check

    Check SiENBE05-722_A 4.1.2 Four Way Valve Performance Check Check No.05 Turn off the power and turn it 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? PCB.

  • Page 116: Thermistor Resistance Check

    SiENBE05-722_A Check 4.1.3 Thermistor Resistance Check Check No.06 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 117: Installation Condition Check

    Check SiENBE05-722_A 4.1.4 Installation Condition Check Check No.07 Installation condition check Check the Abnormal allowable dimensions of the Change the installation air suction and discharge location or direction. area. Normal Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat exchanger very dirty? Clean the outdoor heat...

  • Page 118: Outdoor Fan System Check

    SiENBE05-722_A Check 4.1.6 Outdoor Fan System Check Check No.09 DC motor Check the outdoor fan system. Fan motor lead Outdoor fan running? wire connector disconnected? Reconnect the connector. Outdoor fan system is functioning. Go to Check No. 15. (R7159) 4.1.7 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between No.

  • Page 119: Power Module Check

    Check SiENBE05-722_A 4.1.9 Power Module Check Check No.13 Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) 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 120: Rotation Pulse Check On The Outdoor Unit Pcb

    SiENBE05-722_A Check 4.1.10 Rotation Pulse Check on the Outdoor Unit PCB Check No.15 RK(X)S25/35E2V1B, RK(X)S25/35G2V1B Make sure that the voltage of 320 ± 30 V is applied. 1. Set operation off and power off. Disconnect the connector S70. 2. Check that the voltage between the pins 4 - 7 is 320 VDC. 3.

  • Page 121: Hall Ic Check

    Check SiENBE05-722_A 4.1.11 Hall IC Check Check No.16 1. Check the connector connection. 2. With the power on, operation off, and the connector connected, check the following. ∗Output voltage of about 5 V between pins 1 and 3. ∗Generation of 3 pulses between pins 2 and 3 when the fan motor is operating. If NG in step 1 Æ...
  • Page 122 SiENBE05-722_A Check RK(X)S25/35G2V1B models + ~ ~ – Tester (R12411) RK(X)S25/35G2V1B9 models Tester (R12035) Service Diagnosis...

  • Page 123: Part 7 Removal Procedure

    SiENBE05-722_A Part 7 Removal Procedure 1. Indoor Unit...................113 1.1 Removal of Air Filter / Front Grille ............113 1.2 Removal of Front Panel................116 1.3 Removal of Horizontal Blade..............118 1.4 Removal of Signal Receiver Unit / Swing Motor........119 1.5 Removal of Discharge Grille..............120 1.6 Removal of Drain Pan ................121 1.7 Removal of Electrical Box / PCB ............122 1.8 Removal of Fan Rotor / Fan Motor............125...

  • Page 124: Indoor Unit

    SiENBE05-722_A Indoor Unit 1. Indoor Unit Removal of Air Filter / Front Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. External appearance „ The illustrations are Note: given as the ceiling- The removal procedure is the...
  • Page 125 Indoor Unit SiENBE05-722_A Step Procedure Points Hold the tab at the center of the air filter frame and pull the air filter forward. Air filter (R2980) „ Installing air filters can be Pull the air filter along the guide and remove done easily by sliding along the guide.
  • Page 126 SiENBE05-722_A Indoor Unit Step Procedure Points To remove the front grille, unfasten the hooks at 3 locations. 4. Remove the side cover. Remove the side cover. Side cover Note: If it is difficult to remove the side cover from outside with fingers, remove the front panel first, then push the side cover from inside to...

  • Page 127: Removal Of Front Panel

    Indoor Unit SiENBE05-722_A Removal of Front Panel Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 4 screws of the front panel. Front panel (R2986) Note: For the ceiling-suspended type, remove drain hose before...
  • Page 128 SiENBE05-722_A Indoor Unit Step Procedure Points Unfasten the 3 hooks of Caution the front panel. Hook For ceiling-suspended type, be careful that the front panel may fall when the hooks are disengaged. To prevent the front panel from falling down, (R2989) this work should be done by 2 persons.

  • Page 129: Removal Of Horizontal Blade

    Indoor Unit SiENBE05-722_A Removal of Horizontal Blade Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Open the horizontal blade. Horizontal blade Deflect the 3 center bearings to the left side slightly, and release the shafts of the horizontal blade.

  • Page 130: Removal Of Signal Receiver Unit / Swing Motor

    SiENBE05-722_A Indoor Unit Removal of Signal Receiver Unit / Swing Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the signal receiver unit. Unfasten the 2 hooks (right and left sides) to remove the signal receiver unit.

  • Page 131: Removal Of Discharge Grille

    Indoor Unit SiENBE05-722_A Removal of Discharge Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 screws. Discharge grille (R2999) Unfasten the 2 hooks (right and left sides) and remove the discharge grille by...

  • Page 132: Removal Of Drain Pan

    SiENBE05-722_A Indoor Unit Removal of Drain Pan Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the drain Caution hose. Be careful not to wet the floor with drain water.

  • Page 133: Removal Of Electrical Box / Pcb

    Indoor Unit SiENBE05-722_A Removal of Electrical Box / PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the PCB. Disconnect the earth wire and pull out the indoor heat exchanger thermistor.
  • Page 134 SiENBE05-722_A Indoor Unit Step Procedure Points Power supply PCB Control (R3009) „ Refer to page 14 for detail. The illustration shows the control PCB. (R2958) Disconnect the terminals from the terminal board. Terminal board GRN/YLW Power supply PCB (R9072) Removal Procedure...
  • Page 135 Indoor Unit SiENBE05-722_A Step Procedure Points „ Refer to page 14 for detail. The illustration shows the power supply PCB. (R2959) „ Slide the electrical box to the 2. Remove the electrical box. right side first to unfasten the Remove the 2 screws. hooks.

  • Page 136: Removal Of Fan Rotor / Fan Motor

    SiENBE05-722_A Indoor Unit Removal of Fan Rotor / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 3 fan rotor covers. (Securing hooks are located at A and B-section.) A-section Fan rotor...
  • Page 137 Indoor Unit SiENBE05-722_A Step Procedure Points Remove the 2 screws to remove the fan motor fixtures. Remove the screw to remove the bearing fixture. Bearing Fan motor fixture Bearing fixture (R3018) Release the shaft supporting section using a hexagonal wrench (for M6) to remove the fan motor.

  • Page 138: Removal Of Indoor Heat Exchanger

    SiENBE05-722_A Indoor Unit Removal of Indoor Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points „ Be sure to conduct pump down operation before Auxiliary flexible tube disassembling the refrigerant pipe.
  • Page 139 Indoor Unit SiENBE05-722_A Step Procedure Points Hook is located on the Warning right side behind the Do not contaminate any gas indoor heat exchanger. (including air) other than the specified refrigerant (R-410A) into refrigerating cycle. (Contaminating of air or other gas causes abnormal temperature rise in refrigerating cycle, and this...

  • Page 140: Outdoor Unit - Rk(X)S25/35E2V1B

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B 2. Outdoor Unit - RK(X)S25/35E2V1B Removal of Outer Panels / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Appearance features „...
  • Page 141 Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Step Procedure Points Remove the 3 screws and lift the top panel. Remove the drip proof Drip proof plate plate. (R3240) „ The fan motor is united with Disconnect the connector for the fan the front panel. motor [S70].
  • Page 142 SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B Step Procedure Points „ The front panel has 4 hooks. Unfasten the hooks. Pull and remove the front panel. Hooks (R3243) „ The screw has reverse 3. Remove the fan motor. winding. Unscrew the washer- „...
  • Page 143 Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Step Procedure Points Remove the 2 screws Bell mouth and lift the bell mouth to unfasten the hooks. Hooks (R12422) Remove the bell mouth. „ When reassembling, put the Open the hooks and release the fan motor fan motor lead wire through lead wire.
  • Page 144 SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B Step Procedure Points „ M4×16 Remove the 4 screws and remove the fan motor. Fan motor (R3250) Remove the 2 screws and remove the fan motor fixing frame. Fan motor fixing frame (R3251) Removal Procedure...
  • Page 145 Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Step Procedure Points 4. Remove the right side panel. Remove the 2 screws on the rear side. (R7207) Release the outdoor Outdoor temperature thermistor temperature thermistor. (R7208) Lift up the guard net and remove it. Guard net (R7209) Removal Procedure...
  • Page 146 SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B Step Procedure Points Remove the 4 screws on the right side panel. Right side panel (R7210) Remove the screw near the stop valves. (R7211) Removal Procedure...
  • Page 147 Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Step Procedure Points „ When reassembling, make Unfasten the hook on the rear side. sure to fit the hook. (R7212) „ When reassembling, make Lift up the right side panel and remove it. sure to fit the hook. Hook (R7213) Removal Procedure...

  • Page 148: Removal Of Electrical Box

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the electrical Preparation „ Remove the panels and box.
  • Page 149 Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Step Procedure Points Disconnect the [S40] connector for the overload protector [S40]. (R7217) Disconnect the [S20] connector for the electronic expansion valve coil [S20]. (R7218) Disconnect the connector for the four way valve coil [S80]. [S80] (R7219) Removal Procedure...
  • Page 150 SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B Step Procedure Points „ Be careful not to lose the clip Release the discharge pipe thermistor. for the thermistor. Clip (R12279) Discharge pipe thermistor (R0267) Cut the clamp. (R7221) „ Be careful not to lose the clip Pull out the outdoor heat exchanger for the thermistor.
  • Page 151 Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Step Procedure Points Lift and remove the Electrical Box electrical box. (R7223) Removal Procedure...

  • Page 152: Removal Of Pcb

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points „ You can remove the main Feature of the main PCB when you disconnect the lead wires on the terminal board without...
  • Page 153 Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Step Procedure Points Remove the 4 screws. Screw (R7258) Unfasten the 3 hooks on the upper side. Lift and pull out the main PCB. (R7259) „ Refer to page 16 for detail. [S40] [S30] [S90] [S20]: electronic expansion valve coil [S30]: compressor...

  • Page 154: Removal Of Reactor / Partition Plate

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B Removal of Reactor / Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the reactor. Preparation Reactor „ Remove the outer panels Remove the screw and according to the “Removal of remove the reactor.
  • Page 155 Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Step Procedure Points The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. „ When reassembling, fit the lower hook into the bottom frame. Hook (R3270) Removal Procedure...

  • Page 156: Removal Of Sound Blanket

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points „ Since the piping ports are Remove the sound blanket (top).
  • Page 157 Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Step Procedure Points Pull the sound blanket (inner) out. Sound blanket (inner) (R11887) Pull the sound blanket (bottom) out. Sound blanket (bottom) (R11888) Removal Procedure...

  • Page 158: Removal Of Four Way Valve

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B 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. Step Procedure Points Pull out the electronic expansion valve coil. Electronic expansion valve coil...
  • Page 159 Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Step Procedure Points 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 160 SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B Step Procedure Points Note: „ Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit. „ When withdrawing the pipes, be careful not to pinch them firmly with pliers.

  • Page 161: Removal Of Compressor

    Outdoor Unit - RK(X)S25/35E2V1B SiENBE05-722_A Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 nuts of the compressor. Warning Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.
  • Page 162 SiENBE05-722_A Outdoor Unit - RK(X)S25/35E2V1B Step Procedure Points Heat up the brazed part Note: „ Do not use a metal saw for of the suction side and disconnect. cutting pipes by all means because the sawdust comes into the circuit. „...

  • Page 163: Outdoor Unit - Rk(X)S25/35G2V1B

    Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A 3. Outdoor Unit - RK(X)S25/35G2V1B 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. Step Procedure Points 1.
  • Page 164 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Step Procedure Points Remove the 2 screws Top panel and lift the top panel. (R7190) Remove the drip proof Drip proof plate plate. (R7191) Remove the 4 screws and remove the discharge grille. Discharge grille (R7192) „...
  • Page 165 Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Step Procedure Points Remove the 8 screws of the front panel. Front panel (R7194) „ The front panel has 4 hooks. Unfasten the hooks. Pull and remove the front panel. (R7195) Removal Procedure...
  • Page 166 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Step Procedure Points „ The screw has reverse 3. Remove the fan motor. winding. Remove the washer- „ Nut size: M6 fitted nut of the outdoor fan. 10 mm (R12236) Outdoor fan (R7196) „ When reassembling, align Remove the outdoor fan.
  • Page 167 Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Step Procedure Points Disconnect the [S70] connector for the fan motor [S70]. (R9332) Release the fan motor Fan motor lead wire from the hook. lead wire (R7200) „ When reassembling, put the Open the hooks and release the fan motor fan motor lead wire through lead wire.
  • Page 168 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Step Procedure Points Remove the screw and remove the fan motor fixing frame. Fan motor fixing frame (R7204) (R7205) „ When reassembling, fit the lower hooks into the bottom frame. (R7206) Removal Procedure...
  • Page 169 Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Step Procedure Points 4. Remove the right side panel. Remove the 2 screws on the rear side. (R7207) Release the outdoor Outdoor temperature thermistor temperature thermistor. (R7208) Lift up the guard net and remove it. Guard net (R7209) Removal Procedure...
  • Page 170 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Step Procedure Points Remove the 4 screws on the right side panel. Right side panel (R7210) Remove the screw near the stop valves. (R7211) Removal Procedure...
  • Page 171 Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Step Procedure Points „ When reassembling, make Unfasten the hook on the rear side. sure to fit the hook. (R7212) „ When reassembling, make Lift up the right side panel and remove it. sure to fit the hook. Hook (R7213) Removal Procedure...

  • Page 172: Removal Of Electrical Box

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the 2 Preparation „ Remove the panels and connectors for the reactor.
  • Page 173 Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Step Procedure Points Disconnect the [S90] [S50] connectors for the magnetic relay [S50] and for the thermistors [S90]. (R9341) Disconnect the [S40] [S10] connectors for the filter PCB [S10] and for the overload protector [S40]. (R9342) Disconnect the [S80] [S20]...
  • Page 174 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Step Procedure Points Disconnect the [HN3] [HL3] connectors for the filter PCB [HL3] [HN3]. (R9344) Remove the wire Wire harness harness for standby electricity saving. (R9345) Cut the clamps at 2 locations. (R9346) Removal Procedure...
  • Page 175 Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Step Procedure Points Lift and remove the Electrical box electrical box. (R9348) Removal Procedure...

  • Page 176: Removal Of Thermistors

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Removal of Thermistors Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points „ Be careful not to lose the clip Release the discharge pipe thermistor.
  • Page 177 Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Step Procedure Points Feature of the thermistors (R9356) Removal Procedure...

  • Page 178: Removal Of Pcb

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points „ You can remove the main 1. Remove the main PCB. PCB when you disconnect Feature of the main the lead wires on the...
  • Page 179 Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Step Procedure Points Remove the 4 screws. Screws (R9359) Unfasten the 3 hooks on the upper side. (R9360) Lift and pull out the main PCB. (R9361) Removal Procedure...
  • Page 180 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Step Procedure Points „ Refer to page 18 for detail. Feature of the main [S30] [S10] [S40] [S90] [S50] [S10] [HL3] [HN3]: filter PCB [S20]: electronic expansion valve coil [S30]: compressor [S40]: overload protector [S50]: magnetic relay [S70]: fan motor [S70] [S80]: four way valve coil...

  • Page 181: Removal Of Reactor / Partition Plate

    Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Removal of Reactor / Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the reactor. Preparation Reactor „ Remove the outer panels Remove the screw and according to the “Removal of remove the reactor.
  • Page 182 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Step Procedure Points The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. (R7227) „ When reassembling, fit the lower hook into the bottom frame. Hook (R7228) Removal Procedure...

  • Page 183: Removal Of Sound Blanket

    Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Removal of Sound Blanket Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the sound Preparation „ Remove the outer panels blanket (top).

  • Page 184: Removal Of Four Way Valve

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B 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. Step Procedure Points Pull out the electronic expansion valve coil. Electronic expansion valve coil...
  • Page 185 Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Step Procedure Points 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 186 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Step Procedure Points Note: „ Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit. „ When withdrawing the pipes, be careful not to pinch them firmly with pliers.

  • Page 187: Removal Of Compressor

    Outdoor Unit - RK(X)S25/35G2V1B SiENBE05-722_A Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 nuts of the compressor. Warning Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.
  • Page 188 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B Step Procedure Points Heat up the brazed part Note: „ Do not use a metal saw for of the suction side and disconnect. cutting pipes by all means because the sawdust comes into the circuit. „...

  • Page 189: Outdoor Unit - Rk(X)S25/35G2V1B9

    Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A 4. Outdoor Unit - RK(X)S25/35G2V1B9 Removal of Outer Panels / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Appearance features (R7186) „...
  • Page 190 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points Remove the 2 screws Top panel and lift the top panel. (R7190) Remove the drip proof Drip proof plate plate. (R7191) Remove the 4 screws and remove the discharge grille. Discharge grille (R7192) „...
  • Page 191 Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Step Procedure Points Remove the 8 screws of the front panel. (R11825) Front panel „ The front panel has 4 hooks. Unfasten the hooks. Pull and remove the front panel. Hooks (R11826) Removal Procedure...
  • Page 192 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points „ The screw has reverse 3. Remove the fan motor. winding. Remove the washer- „ Nut size: M6 fitted nut of the outdoor fan. 10 mm (R12236) Outdoor fan (R11827) „ When reassembling, align Remove the outdoor fan.
  • Page 193 Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Step Procedure Points Cut the clamp. (R11830) Disconnect the connector for the fan motor [S70]. (R11831) [S70] Release the fan motor Fan motor lead wire from the hook. lead wire (R11832) Removal Procedure...
  • Page 194 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 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 195 Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Step Procedure Points „ When reassembling, put the Open the hooks and release the fan motor fan motor lead wire through lead wire. the back of the fan motor (so as not to be entangled with the outdoor fan).
  • Page 196 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points Remove the 4 screws Right side panel on the right side panel. (R12163) Remove the screw near the stop valves. (R11839) „ When reassembling, make Unfasten the hook on the rear side. sure to fit the hook.
  • Page 197 Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Step Procedure Points „ When reassembling, make Lift up the right side panel and remove it. sure to fit the hook. Hook (R12272) Lift up the guard net Guard net and remove it. (R11841) Removal Procedure...

  • Page 198: Removal Of Electrical Box

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the Preparation „ Remove the panels and connector for the overload protector disconnect the connector for [S40].
  • Page 199 Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Step Procedure Points Disconnect the relay connector for the compressor. (R11845) Disconnect the connector for the electronic expansion valve coil [S20]. [S20] (R11847) Cut the clamp. (R11850) „ Be careful not to lose the clip Pull out the outdoor heat exchanger for the thermistor.
  • Page 200 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points „ Be careful not to lose the clip Release the discharge pipe thermistor. for the thermistor. Clip (R12279) Discharge pipe thermistor (R11849) Lift and remove the Electrical Box electrical box. (R11852) Removal Procedure...

  • Page 201: Removal Of Pcb

    Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points „ You can remove the main 1. Remove the main PCB. PCB when you disconnect Feature of the main the lead wires on the...
  • Page 202 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points „ Be careful of a sharp Pull out the forced operation button PCB. protrusion at the back of the Disconnect the forced operation button connector [S110] to PCB. remove the forced operation button PCB. Forced operation button PCB (R11856) Disconnect the relay...
  • Page 203 Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Step Procedure Points Release the harness. (R11859) Cut the clamps at the 2 locations. (R11860) Disconnect the connector for the filter PCB [S10]. [S10] (R11861) Removal Procedure...
  • Page 204 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points Disconnect the connectors for the [S100] magnetic relay [S50] and for the forced operation button PCB [S100]. [S50] (R11862) Disconnect the connector for the filter [HN3] PCB [HL3] [HN3]. [HL3] (R11863) Release the harnesses from the hook.
  • Page 205 Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Step Procedure Points Remove the 6 screws. (R11866) Unfasten the 4 hooks and remove the main PCB. (R11867) „ Refer to page 20 for detail. [S50] [S100] [S10] [HL3] [HN3]: filter PCB [S20]: electronic expansion [HL3] valve coil [HN3]...
  • Page 206 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points 2. Remove the filter PCB. Release the harnesses from the hook. Filter PCB (R11869) Cut the clamp. (R11871) Release the harnesses from the hook. (R11872) Removal Procedure...
  • Page 207 Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Step Procedure Points Release the harnesses from the hooks. (R11873) Remove the screw. (R11874) Unfasten the 2 hooks. Filter PCB (R11876) Lift and pull out the filter PCB. (R11877) Removal Procedure...
  • Page 208 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points „ Refer to page 20 for detail. Feature of the filter (R11878) Removal Procedure...

  • Page 209: Removal Of Reactor / Partition Plate

    Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Removal of Reactor / Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the reactor. Preparation Reactor „ Remove the outer panels Remove the screw and according to the “Removal of remove the reactor.
  • Page 210 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. (R12280) „ When reassembling, fit the lower hook into the bottom frame. (R11883) Removal Procedure...

  • Page 211: Removal Of Sound Blanket

    Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points „ Since the piping ports are Remove the sound blanket (top).
  • Page 212 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points Pull the sound blanket (inner) out. Sound blanket (inner) (R11887) Pull the sound blanket (bottom) out. Sound blanket (bottom) (R11888) Removal Procedure...

  • Page 213: Removal Of Four Way Valve

    Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Removal of Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Pull out the electronic expansion valve coil. Electronic expansion valve coil (R7233)
  • Page 214 SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Step Procedure Points 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 215 Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Step Procedure Points Note: „ Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit. „ When withdrawing the pipes, be careful not to pinch them firmly with pliers.

  • Page 216: Removal Of Compressor

    SiENBE05-722_A Outdoor Unit - RK(X)S25/35G2V1B9 Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 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 217 Outdoor Unit - RK(X)S25/35G2V1B9 SiENBE05-722_A Step Procedure Points Heat up the brazed part Note: „ Do not use a metal saw for of the suction side and disconnect. cutting pipes by all means because the sawdust comes into the circuit. „...

  • Page 218: Part 8 Trial Operation And Field Settings

    SiENBE05-722_A Part 8 Trial Operation and Field Settings 1. Trial Operation ..................208 2. Field Settings ..................209 2.1 When 2 Units are Installed in 1 Room..........209 2.2 Standby Electricity Saving..............210 2.3 Facility Setting Jumper (cooling at low outdoor temperature) ....211 2.4 Jumper and Switch Settings..............212 3.

  • Page 219: Trial Operation

    Trial Operation SiENBE05-722_A 1. Trial Operation Outline 1. Measure the supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating mode. 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 220: Field Settings

    SiENBE05-722_A Field Settings 2. Field Settings When 2 Units are Installed in 1 Room When 2 indoor units are installed in 1 room, 1 of the 2 pairs of indoor unit and infrared remote control can be set for different address. Both the indoor unit PCB and the infrared remote control need alteration.

  • Page 221: Standby Electricity Saving

    Field Settings SiENBE05-722_A Standby Electricity Saving Outline RK(X)S25/35G2V1B, RK(X)S25/35G2V1B9 Models Only This function turns power supply OFF to the outdoor unit and sets the indoor unit into energy- saving mode, thus reducing the power consumption of the air conditioner. Detail Following procedure is required for turning ON the function.

  • Page 222: Facility Setting Jumper (Cooling At Low Outdoor Temperature)

    SiENBE05-722_A Field Settings Facility Setting Jumper (cooling at low outdoor temperature) Outline For Cooling Only Model This function is limited only for facilities (the target of air conditioning is equipment (such as computer)). Never use it in a residence or office (the space where there is a human). Detail You can expand the operation range to –15°C by cutting jumper on the outdoor unit PCB.

  • Page 223: Jumper And Switch Settings

    Field Settings SiENBE05-722_A A humidifier might cause dew jumping from the indoor unit outlet vent. 4. Cutting jumper sets the indoor fan tap to the highest position. Jumper and Switch Settings Jumper Function When connected When cut (factory set) Fan speed setting Fan speed setting;...

  • Page 224: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    SiENBE05-722_A Application of Silicon Grease to a Power Transistor and a Diode Bridge 3. Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board (PCB) of an outdoor unit is replaced, it is required that silicon grease (*1) is certainly applied to the heat radiation part (the contact point to the radiation fin) of the power transistor and diode bridge.
  • Page 225 Application of Silicon Grease to a Power Transistor and a Diode Bridge SiENBE05-722_A Trial Operation and Field Settings...

  • Page 226: Part 9 Appendix

    SiENBE05-722_A Part 9 Appendix 1. Piping Diagrams..................216 1.1 Indoor Unit....................216 1.2 Outdoor Unit ..................217 2. Wiring Diagrams..................219 2.1 Indoor Unit....................219 2.2 Outdoor Unit ..................219 Appendix...

  • Page 227: Piping Diagrams

    Piping Diagrams SiENBE05-722_A 1. Piping Diagrams Indoor Unit FLKS25/35BAVMB FLXS25/35BAVMB INDOOR UNIT INDOOR UNIT ( 6.4CuT ) ( 6. 4CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR FIELD PIPING ON HEAT ( 6. 4CuT ) THERMISTOR EXCH. SIROCCO FAN FIELD PIPING ON HEAT ( 6.

  • Page 228: Outdoor Unit

    SiENBE05-722_A Piping Diagrams Outdoor Unit 1.2.1 Cooling Only RKS25/35E2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.0CuT 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 4.8CuT 6.4CuT 6.4CuT 4.8CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY FIELD PIPING VALVE...
  • Page 229 Piping Diagrams SiENBE05-722_A 1.2.2 Heat Pump RXS25/35E2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER 7.0 CuT THERMISTOR 7.0 CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 4.8CuT 6.4CuT 6.4CuT 4.8CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY FIELD PIPING VALVE...

  • Page 230: Wiring Diagrams

    SiENBE05-722_A Wiring Diagrams 2. Wiring Diagrams Indoor Unit FLK(X)S25/35BAVMB PCB3 PCB1 PCB2 3.15A → outdoor FIELD WIRING. / YLW PCB4 TRANSMISSION CIRCUIT CAUTION NOTE THAT OPERATION WILL SIGNAL RESTART AUTOMATICALLY IF RECEIVER THE MAIN POWER SUPPLY IS indoor TURNED OFF AND THEN BACK ON AGAIN.
  • Page 231 Wiring Diagrams SiENBE05-722_A RK(X)S25/35G2V1B FIELD WIRING. MRM20 IPM1 indoor MRM10 C118 3.15A MR30 3.15A W V U PCB2 PCB1 MR30_A MR30_B MRCW outdoor NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. IN CASE OF t° t° t° C5, C6, C118 : CAPACITOR HEAT PUMP DB1, DB2...
  • Page 232 Specifications are subject to change without environment. This challenge demands the eco design prior notice. Daikin Europe N.V. explicitly rejects any liability for any direct or and development of a wide range of products and an indirect damage, In the broadest sense, arising from or related to the use energy management system, resulting in energy and/or interpretation of this publication.

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