Daikin FLKS25BVMB Service Manual
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Daikin FLKS25BVMB Service Manual

Inverter pair floor / ceiling suspended dual type b-series
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See also: Service Manual , Operating Manual
Service
Manual
Inverter Pair
Floor / Ceiling Suspended Dual Type
B-Series
[Applied Models]
Inverter Pair : Cooling Only
Inverter Pair : Heat Pump
SiBE05-311

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Summary of Contents for Daikin FLKS25BVMB

  • Page 1 SiBE05-311 Service Manual Inverter Pair Floor / Ceiling Suspended Dual Type B-Series [Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump...
  • Page 2 SiBE05-311 Inverter Pair B-Series Cooling Only Indoor Unit FLKS25BVMB FLKS35BVMB FLK25BVMB FLK35BVMB Outdoor Unit RKS25BVMB RKS35BVMB RK25BVMB RK35BVMB Heat Pump Indoor Unit FLXS25BVMB FLXS35BVMB FLX25BVMB FLX35BVMB Outdoor Unit RXS25BVMB RXS35BVMB RX25BVMB RX35BVMB Table of Contents...

  • Page 3: Table Of Contents

    SiBE05-311 1. Introduction .....................v 1.1 Safety Cautions ..................v Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 Cooling Only .................... 2 1.2 Heat Pump....................3 Part 2 Specifications..............5 1. Specifications ..................6 1.1 Cooling Only .................... 6 1.2 Heat Pump....................
  • Page 4 SiBE05-311 3.14 Forced Operation Mode................. 44 3.15 Additional Function ................44 Part 5 System Configuration............45 1. System Configuration................46 2. Instruction....................47 2.1 Safety Precautions ................47 2.2 Names of Parts..................49 2.3 Preparation before Operation ..............52 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........55 2.5 Adjusting the Air Flow Direction.............
  • Page 5 SiBE05-311 1.2 Removal of the Front Panel..............117 1.3 Removal of the Horizontal Blade ............119 1.4 Removal of the Signal Receiver Unit / Swing Motor......120 1.5 Removal of the Discharge Grille............121 1.6 Removal of the Drain Pan ..............122 1.7 Removal of the Electrical Box / PCB ...........

  • Page 6: Introduction

    SiBE05-311 Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. Warnings The caution items are classified into “ 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 7: Cautions Regarding Products After Repair

    Introduction SiBE05-311 Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.

  • Page 8: Inspection After Repair

    SiBE05-311 Introduction Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.

  • Page 9: Using Icons

    Introduction SiBE05-311 Warning Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances, since it can cause an electrical shock, excessive heat generation or fire. Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure.

  • Page 10: Part 1 List Of Functions

    SiBE05-311 Part 1 List of Functions 1. List of Functions ..................2 1.1 Cooling Only .................... 2 1.2 Heat Pump....................3 List of Functions...

  • Page 11: List Of Functions

    List of Functions SiBE05-311 1. List of Functions Cooling Only Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, –10 Virustatic Functions Operation Limit for Cooling (˚CDB) Basic Function Operation Limit for Heating (˚CWB) — —...

  • Page 12: Heat Pump

    SiBE05-311 List of Functions Heat Pump Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, –10 Virustatic Functions Operation Limit for Cooling (˚CDB) Basic –15 –10 Function Operation Limit for Heating (˚CWB) Photocatalytic Deodorizing Filter —...
  • Page 13 List of Functions SiBE05-311 List of Functions...

  • Page 14: Part 2 Specifications

    SiBE05-311 Part 2 Specifications 1. Specifications ..................6 1.1 Cooling Only .................... 6 1.2 Heat Pump....................8 Specifications...

  • Page 15: Specifications

    Specifications SiBE05-311 1. Specifications Cooling Only 230V, 50Hz Indoor Units FLKS25BVMB FLKS35BVMB Model Outdoor Units RKS25BVMB RKS35BVMB 2.5 (1.0~3.0) 3.5 (1.0~3.7) Capacity Btu/h 8,550 (3,400~10,250) 11,950 (3,400~12,600) Rated (Min.~Max.) kcal/h 2,150 (860~2,580) 3,010 (860~3,182) Moisture Removal Running Current (Rated) Power Consumption...
  • Page 16 SiBE05-311 Specifications 230V, 50Hz Indoor Units FLK25BVMB FLK35BVMB Models Outdoor Units RK25BVMB RK35BVMB 2.5 (1.3~3.0) 3.43 (1.4~3.8) Capacity Btu/h 8,550 (4,450~10,250) 11,700 (4,450~13,000) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,950 (1,120~3,270) Moisture Removal Running Current (Rated) Power Consumption 890 (430~1,250) 1,315 (500~1,720) Rated (Min.~Max.) Power Factor 92.1...

  • Page 17: Heat Pump

    Specifications SiBE05-311 Heat Pump 230V, 50Hz Indoor Units FLXS25BVMB FLXS35BVMB Models RXS25BVMB RXS35BVMB Outdoor Units Cooling Heating Cooling Heating 2.5 (1.0~3.0) 3.4 (1.0~5.0) 3.5 (1.0~3.7) 4.5 (1.0~5.0) Capacity Btu/h 8,550 (3,400~10,250) 11,600 (3,400~17,050) 11,950 (3,400~12,600) 15,350 (3,400~17,050) Rated (Min.~Max.) kcal/h 2,150 (860~2,580) 2,920 (860~4,300) 3,010 (860~3,180)
  • Page 18 SiBE05-311 Specifications 230V, 50Hz Indoor Units FLX25BVMB FLX35BVMB Models RX25BVMB RX35BVMB Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.3 (1.3~4.0) 3.43 (1.4~3.8) 4.1 (1.4~5.0) Capacity Btu/h 8,550 (4,450~10,250) 11,300 (4,450~13,650) 11,700 (4,800~13,000) 14,000 (4,800~17,100) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,840 (1,120~3,440) 2,950 (1,200~3,270) 3,530 (1,200~4,300)
  • Page 19 Specifications SiBE05-311 Specifications...

  • Page 20: Part 3 Printed Circuit Board

    SiBE05-311 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........12 1.1 Indoor Unit ..................... 12 1.2 Outdoor Unit ..................14 Printed Circuit Board Connector Wiring Diagram...

  • Page 21: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram SiBE05-311 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors 1) S6 Connector for swing motor 2) S7 Connector for fan motor 3) S21 Connector for centralized control (HA) 4) S24 Connector for display PCB 5) S25, S27, S36 Connector for control PCB 6) S26 Connector for signal receiver PCB...
  • Page 22 SiBE05-311 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1) : Control PCB (indoor unit) JB JA (R2958) PCB (2) : Power Supply PCB (indoor unit) (R2959) PCB (3) : Display PCB PCB (4) : Signal Receiver PCB LED3 LED2 LED1 (R2960)

  • Page 23: Outdoor Unit

    Printed Circuit Board Connector Wiring Diagram SiBE05-311 Outdoor Unit Printed circuit board (1) Printed circuit board (2) Name of Connector 1) S10 Connector for PCB (2) 2) S11 Connector for PCB (1) 3) S30 Connector for compressor motor 4) S70 Connector for fan motor 5) S80 Connector for four way valve coil (Heat pump only)
  • Page 24 SiBE05-311 Printed Circuit Board Connector Wiring Diagram Detail of PCB (1) Connect to S11 on PCB (2) 3P100242-1B Detail of PCB (2) Printed Circuit Board Connector Wiring Diagram...
  • Page 25 Printed Circuit Board Connector Wiring Diagram SiBE05-311 Printed Circuit Board Connector Wiring Diagram...

  • Page 26: Part 4 Function And Control

    SiBE05-311 Part 4 Function and Control 1. Main Functions..................18 1.1 Frequency Principle................18 1.2 Auto-Swing .................... 20 1.3 Fan Speed Control for Indoor Units............21 1.4 Programme Dry Function ..............22 1.5 Automatic Operation................23 1.6 Night Set Mode..................24 1.7 Home Leave Operation .................

  • Page 27: Main Functions

    Main Functions SiBE05-311 1. Main Functions Note: See the list of functions for the functions applicable to different models. Frequency Principle Main Control The compressor is frequency-controlled during normal operation. The target frequency is set by the following 2 parameters coming from the operating indoor unit: Parameters The load condition of the operating indoor unit The difference between the room temperature and the set temperature...
  • Page 28 SiBE05-311 Main Functions Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outdoor air temperature and cooling/heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables a quick set temperature.

  • Page 29: Auto-Swing

    Main Functions SiBE05-311 Auto-Swing Auto-Swing The following table explains the auto-swing process for heating, cooling, dry and fan: up and down (automatic) right and left (manual) heating cooling / dry / fan ceiling (R2964) (R2965) (R2963) floor (R2967) (R2966) (R2968) Function and Control...

  • Page 30: Fan Speed Control For Indoor Units

    SiBE05-311 Main Functions Fan Speed Control for Indoor Units Control Mode The airflow rate can be automatically controlled depending on the difference between the set temperature and the room temperature. This is done through phase control and hall IC control. For more information about hall IC, refer to the troubleshooting for fan motor on page 79.

  • Page 31: Programme Dry Function

    Main Functions SiBE05-311 Programme Dry Function Programme dry function removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and air flow volume, the temperature adjustment and fan adjustment buttons are inoperable in this mode. In Case of The microcomputer automatically sets the temperature and fan settings.

  • Page 32: Automatic Operation

    SiBE05-311 Main Functions Automatic Operation Automatic Cooling / Heating Function (Heat Pump Only) When the AUTO mode is selected with the remote controller, the microcomputer automatically determines the operation mode from cooling and heating according to the room temperature and setting temperature at the time of the operation startup, and automatically operates in that mode.

  • Page 33: Night Set Mode

    Main Functions SiBE05-311 Night Set Mode When the OFF timer is set, the Night Set circuit automatically activates. The Night Set circuit maintains the airflow setting made by users. The Night Set The Night Set circuit continues heating or cooling the room at the set temperature for the first Circuit one hour, then automatically lowers the temperature setting slightly in the case of cooling, or raises it slightly in the case of heating, for economical operations.

  • Page 34: Home Leave Operation

    SiBE05-311 Main Functions Home Leave Operation Outline In order to respond to the customer's need for immediate heating and cooling of the room after returning home or for house care, a measure to switch the temperature and air volume from that for normal time over to outing time by one touch is provided.

  • Page 35: Inverter Powerful Operation

    Main Functions SiBE05-311 Inverter Powerful Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Details of the When Powerful button is pushed in each operation mode, the fan speed/setting temperature will Control be converted to the following states in a period of twenty minutes.

  • Page 36: Other Functions

    SiBE05-311 Main Functions Other Functions 1.9.1 Hot Start Function Heat Pump Only In order to prevent the cold air blast that normally comes when heating is started, the temperature of the heat exchanger of the indoor unit is detected, and either the air flow is stopped or is made very weak thereby carrying out comfortable heating of the room.

  • Page 37: Function Of Main Structural Parts

    Function of Main Structural Parts SiBE05-311 2. Function of Main Structural Parts Main Structural Parts Heat Pump Model Electrontic expansion valve Four way valve Compressor (R2825) Cooling Only Model Electrontic expansion valve Compressor (R2826) Function and Control...

  • Page 38: Function Of Thermistor

    SiBE05-311 Function of Main Structural Parts Function of Thermistor 2.2.1 Heat Pump Model Four way valve Compressor (R2827) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. Exchanger Set a target discharge temperature depending on the outdoor and indoor heat exchanger temperature.

  • Page 39: Cooling Only Model

    Function of Main Structural Parts SiBE05-311 2.2.2 Cooling Only Model Compressor (R2828) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. Set a target discharge temperature depending on the outdoor and indoor heat exchanger Exchanger temperature.

  • Page 40: Control Specification

    SiBE05-311 Control Specification 3. Control Specification Mode Hierarchy Outline There are two modes; the mode selected in user’s place (normal air conditioning mode) and forced operation mode for installation and providing service. Detail 1. For heat pump model There are following modes; stop, cooling (includes drying), heating (include defrosting) Air conditioner control mode Forced operating mode Forced cooling (for Pump Down Operation)

  • Page 41: Frequency Control

    Control Specification SiBE05-311 Frequency Control Outline Frequency will be determined according to the difference between room and set temperature. The function is explained as follows. 1. How to determine frequency. 2. Frequency command from an indoor unit. (The difference between a room temperature and the temperature set by the remote controller.) 3.
  • Page 42 SiBE05-311 Control Specification 3. Determine lower limit frequency Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions: Pressure difference upkeep. 4. Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency. Indoor Frequency Command (∆D signal) The difference between a room temperature and the temperature set by the remote controller will be taken as the “∆D signal”...

  • Page 43: Controls At Mode Changing / Start-Up

    Control Specification SiBE05-311 Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline Operate the inverter in the open phase operation with the conditions including the preheating command (only for heat pump model) from the indoor, the outdoor air temperature and discharge pipe temperature.

  • Page 44: Discharge Pipe Control

    SiBE05-311 Control Specification Discharge Pipe Control Outline The discharge pipe temperature is used as the compressor's internal temperature. If the discharge pipe temperature rises above a certain level, the operating frequency upper limit is set to keep this temperature from going up further. Detail Divide the Zone Stop zone...

  • Page 45: Freeze-Up Protection Control

    Control Specification SiBE05-311 Freeze-up Protection Control Outline During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings. Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from...

  • Page 46: Fan Control

    SiBE05-311 Control Specification Fan Control Outline Fan control is carried out according to the following priority. 1. Fan ON control for electric component cooling fan 2. Fan control when defrosting 3. Fan OFF delay when stopped 4. ON/OFF control when cooling operation 5.

  • Page 47: Moisture Protection Function 2

    Control Specification SiBE05-311 3. The set of a constant DOA1CG, DOA2CG, DOA3CG, FCG7 and FCG8 have constants for Cooling / Heating separately and these constants are distinguished with a suffix c/w. Outdoor temperature DOA2CG DOA1CG DOA4CG DOA3CG The lower Cancelled FCG7 FCG8 FCG7...

  • Page 48: Defrost Control

    SiBE05-311 Control Specification 3.11 Defrost Control Outline Heat Pump Only Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing. Detail Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature.

  • Page 49: Electronic Expansion Valve Control

    Control Specification SiBE05-311 3.12 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Open Control 1.
  • Page 50 SiBE05-311 Control Specification 3.12.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 3.12.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.

  • Page 51: Target Discharge Pipe Temperature Control

    Control Specification SiBE05-311 3.12.7 Control when frequency is changed When the target discharge pipe temperature control is active, if the target frequency is changed for a specified value in a certain time period, cancel the target discharge pipe temperature control and change the target opening of the electronic expansion valve according to the shift. 3.12.8 Target Discharge Pipe Temperature Control Obtain the target discharge pipe temperature from the indoor and outdoor heat exchanger temperature, and adjust the electronic expansion valve opening so that the actual discharge...

  • Page 52: Malfunctions

    SiBE05-311 Control Specification 3.13 Malfunctions 3.13.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Outdoor air thermistor Relating to CT Malfunction When the output frequency is more than 62 Hz and the input current is less than 0.5A, carry out abnormal adjustment.

  • Page 53: Forced Operation Mode

    Control Specification SiBE05-311 3.14 Forced Operation Mode Outline Forced operating mode includes only forced cooling. Detail Forced Cooling Item Forced Cooling Forced operation 1) The outdoor unit is not abnormal allowing conditions and not in the 3-minute stand-by mode. 2) The operating mode of the outdoor unit is the stop mode.

  • Page 54: Part 5 System Configuration

    SiBE05-311 Part 5 System Configuration 1. System Configuration................46 2. Instruction....................47 2.1 Safety Precautions ................47 2.2 Names of Parts..................49 2.3 Preparation before Operation ..............52 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........55 2.5 Adjusting the Air Flow Direction............. 57 2.6 POWERFUL Operation .................

  • Page 55: System Configuration

    System Configuration SiBE05-311 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 56: Instruction

    Do not attempt to repair, relocate, modify or reinstall the air conditioner by yourself. Incorrect work will cause electric shocks, fire etc. • For repairs and reinstallation, consult your Daikin dealer for advice and information. • The refrigerant used in the air conditioner is safe. Although leaks should not occur,...

  • Page 57: Installation Site

    Instruction SiBE05-311 • Do not stand or sit on the outdoor unit. Do not place any object on the unit to avoid injury, do not remove the fan guard. • Do not place anything under the indoor or outdoor unit that must be kept away from moisture.

  • Page 58: Names Of Parts

    SiBE05-311 Instruction Names of parts Indoor Unit The indoor unit can be installed either to the ceiling or to a wall. The descriptions contained in this manual show the case when installation is being carried out to the ceiling. (The methods of operation used are the same when installing to a wall.) Opening the front grille How to open the front grille: (page 22)
  • Page 59 Instruction SiBE05-311 Outdoor Unit Indoor Unit 1. Louvres (vertical blades) 13. Indoor unit ON/OFF switch: (page 10.) • The louvres are inside of the air outlet. • Push this switch once to start operation. (page 12.) Push once again to stop it. 2.

  • Page 60: Remote Controller

    SiBE05-311 Instruction Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT CANCEL TIMER < > ARC433A5, A6 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) •...

  • Page 61: Preparation Before Operation

    Instruction SiBE05-311 Preparation before Operation To set the batteries 1. Press with a finger and slide the front cover to take it off. Position + and 2. Set two dry batteries (AAA). – correctly! 3. Set the front cover as before. ATTENTION About batteries •...
  • Page 62 SiBE05-311 Instruction To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. •...

  • Page 63: To Set The Clock

    Instruction SiBE05-311 To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. Holding down “ ” or “ ” button rapidly increases or decreases the time display. 3.

  • Page 64: Auto · Dry · Cool · Heat · Fan Operation

    SiBE05-311 Instruction 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. To start operation 1.

  • Page 65: To Change The Air Flow Rate Setting

    Instruction SiBE05-311 To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or HEAT or COOL or FAN mode “ ” Five levels of air flow rate setting from “ ” plus “ ” “ ”...

  • Page 66: Adjusting The Air Flow Direction

    SiBE05-311 Instruction Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. To adjust the horizontal blade (flap) 1. Press “SWING button”. The display will light up and the flap will begin to swing. 2.
  • Page 67 Instruction SiBE05-311 To adjust the vertical blades (louvres) • When adjusting the louvre, use a robust and stable stool and watch your steps carefully. Hold the knob and move the louvres. (You will find a knob on the left side and the right side blades.) Notes on flap and louvres angles •...

  • Page 68: Powerful Operation

    SiBE05-311 Instruction 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 69: Outdoor Unit Silent Operation

    Instruction SiBE05-311 OUTDOOR UNIT SILENT Operation OUTDOOR UNIT SILENT operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on th eoutddor unit. This function is convenient during night. To start OUTDOOR UNIT SILENT operation 1.

  • Page 70: Home Leave Operation

    SiBE05-311 Instruction 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 To cancel HOME LEAVE operation HOME LEAVE...
  • Page 71 Instruction SiBE05-311 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 72: Timer Operation

    SiBE05-311 Instruction 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 • Check that the clock is correct.

  • Page 73: To Use On Timer Operation

    Instruction SiBE05-311 To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. (page 9.). 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.

  • Page 74: Care And Cleaning

    SiBE05-311 Instruction 2.10 Care and Cleaning CAUTION • Before cleaning, be sure to stop the operation and turn the breaker OFF. UNITS Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front grille 1. Open the front grille. •...

  • Page 75: Air Filter

    Instruction SiBE05-311 Filters 1. Open the front grille. (page 22) 2. Pull out the air filters. • Push upwards the tab at the center of each air filter, then pull it down. 3. Take off the air purifying filter photocatalytic deodorizing filter. •...

  • Page 76: Before A Long Idle Period

    SiBE05-311 Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the earth wire is not disconnected or broken. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation.

  • Page 77: Troubleshooting

    Instruction SiBE05-311 2.11 Troubleshooting These cases are not troubles. The following cases are not air conditioner troubles but have some reasons. You may just continue using it. Case Explanation Operation does not start soon. • This is to protect the air conditioner. •...

  • Page 78: Check Again

    SiBE05-311 Instruction Check again. Please check again before calling a repair person. Case Check The air conditioner does not • Hasn’t a breaker turned OFF or a fuse blown? operate. • Isn’t it a power failure? (OPERATION lamp is off) •...

  • Page 79: Call The Service Shop Immediately

    Instruction SiBE05-311 Call the service shop immediately. WARNIING When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner. Do not attempt to repair or modify the air conditioner by yourself.

  • Page 80: Part 6 Service Diagnosis

    SiBE05-311 Part 6 Service Diagnosis 1. Caution for Diagnosis................72 2. Problem Symptoms and Measures ............73 3. Service Check Function ................74 4. Troubleshooting ..................75 4.1 Error Codes and Description ..............75 4.2 Indoor Unit PCB Abnormality..............76 4.3 Freeze-up Protection Control or High Pressure Control......77 4.4 Fan Motor (AC Motor) or Related Abnormality ........

  • Page 81: Caution For Diagnosis

    Caution for Diagnosis SiBE05-311 1. Caution for Diagnosis The Operation lamp flashes when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation. 2.

  • Page 82: Problem Symptoms And Measures

    SiBE05-311 Problem Symptoms and Measures 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page None of the units operates. Check the power supply. Check to make sure that the rated voltage is — supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...

  • Page 83: Service Check Function

    Service Check Function SiBE05-311 3. Service Check Function In the ARC433A series remote controller, the temperature display sections on the main unit indicate corresponding codes. 1. When the timer cancel button is held down for 5 seconds, a “00” indication flashes on the temperature display section.

  • Page 84: Troubleshooting

    SiBE05-311 Troubleshooting 4. Troubleshooting Error Codes and Description Reference Code Indication Description Page System — Normal Insufficient gas Over-voltage detection Signal transmission error (between indoor and outdoor units) Indoor Indoor unit PCB abnormality Unit Freeze-up protection control or high pressure control Fan motor or related abnormality Heat exchanger temperature thermistor abnormality Room temperature thermistor abnormality...

  • Page 85: Indoor Unit Pcb Abnormality

    Troubleshooting SiBE05-311 Indoor Unit PCB Abnormality Remote Controller Display Method of Evaluation of zero-cross detection of power supply by indoor unit. Malfunction Detection Malfunction When there is no zero-cross detection in approximately 10 continuous seconds. Decision Conditions Supposed Faulty indoor unit PCB Causes Faulty connector connection Troubleshooting...

  • Page 86: Freeze-Up Protection Control Or High Pressure Control

    SiBE05-311 Troubleshooting Freeze-up Protection Control or High Pressure Control Remote Controller Display Method of High pressure control (heat pump model only) During heating operations, the temperature detected by the indoor heat exchanger Malfunction thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection Freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
  • Page 87 Troubleshooting SiBE05-311 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Check the air passage. Refer to P.106 Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 88: Fan Motor (Ac Motor) Or Related Abnormality

    SiBE05-311 Troubleshooting Fan Motor (AC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction When the detected rotation speed is less than 50% of the HH tap under maximum fan motor Decision rotation demand.

  • Page 89: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting SiBE05-311 Thermistor or Related Abnormality (Indoor Unit) C4, C9 Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor Decision operation∗.

  • Page 90: Signal Transmission Error (Between Indoor And Outdoor Units)

    SiBE05-311 Troubleshooting Signal Transmission Error (between Indoor and Outdoor Units) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of Decision the data is abnormal.

  • Page 91: Ol Activation (Compressor Overload)

    Troubleshooting SiBE05-311 OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will be shut down. Decision The error counter will reset itself if this or any other error does not occur during the following 60-minute compressor running time (total time).

  • Page 92: Compressor Lock

    SiBE05-311 Troubleshooting Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection Malfunction The system judges the compressor lock, and stops due to over current. Decision The system judges the compressor lock, and cannot operation with position detection within 15 seconds after start up.

  • Page 93: Input Over Current Detection

    Troubleshooting SiBE05-311 Input Over Current Detection Remote Controller Display Method of An input over-current is detected by checking the input current value being detected by CT with Malfunction the compressor running. Detection Malfunction The following CT input with the compressor running continues for 2.5 seconds. Decision Cooling: Above 11A, Heating: Above 13A Conditions...

  • Page 94: Four Way Valve Abnormality

    SiBE05-311 Troubleshooting 4.10 Four Way Valve Abnormality Remote Controller Display Method of The indoor air temperature thermistor, the indoor unit heat exchanger thermistor, the outdoor Malfunction temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if they function within their normal ranges in the operating mode.
  • Page 95 Troubleshooting SiBE05-311 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.5 Refer to P.105 Four way valve coil Correct. disconnected (loose)? Check No.6 Refer to P.106 Harness out of connector? Reconnect.

  • Page 96: Discharge Pipe Temperature Control

    SiBE05-311 Troubleshooting 4.11 Discharge Pipe Temperature Control Remote Controller Display Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the Malfunction temperature being detected by the discharge pipe thermistor. Detection Malfunction If a stop takes place 6 times successively due to abnormal discharge pipe temperature, the Decision system will be shut down.

  • Page 97: Position Sensor Abnormality

    Troubleshooting SiBE05-311 4.12 Position Sensor Abnormality Remote Controller Display Method of FLK(X)S series only Malfunction A compressor startup failure is detected by checking the compressor running condition through the position detection circuit. Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal Decision is sent.

  • Page 98: Ct Or Related Abnormality

    SiBE05-311 Troubleshooting 4.13 CT or Related Abnormality Remote Controller Display Method of A CT or related error is detected by checking the compressor running frequency and CT- Malfunction detected input current. Detection Malfunction The compressor running frequency is below 62 Hz and the CT input is below 0.1 V. Decision (The input current is also below 0.5 A.) If this error repeats 4 times, the system will be shut down.
  • Page 99 Troubleshooting SiBE05-311 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.12 Turn off the power and turn it on again. Refer to P.110 Get the system started. ∗...

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

    SiBE05-311 Troubleshooting 4.14 Thermistor or Related Abnormality (Outdoor Unit) P4, J3, J6, H9 Remote Controller Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. Malfunction [A thermistor error is detected by checking the temperature.] Detection Malfunction The thermistor input is above 4.96 V or below 0.04 V with the power on.
  • Page 101 Troubleshooting SiBE05-311 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn on the power again. Refer to P.106 Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.

  • Page 102: Electrical Box Temperature Rise

    SiBE05-311 Troubleshooting 4.15 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 Malfunction With the compressor off, the radiation fin temperature is above 122˚C. (Reset is made when the Decision temperature drops below 113˚C.) Conditions...
  • Page 103 Troubleshooting SiBE05-311 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. WARNING Check No.6 Turn off the power and turn it on again. To cool down the electricals, the Refer to P.106 outdoor unit fan gets started when the radiation fin temperature rises...

  • Page 104: Radiation Fin Temperature Rise

    SiBE05-311 Troubleshooting 4.16 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 Malfunction If the radiation fin temperature with the compressor on is above 81˚C, Decision If a radiation fin temperature rise takes place 4 times successively, the system will be shut down.
  • Page 105 Troubleshooting SiBE05-311 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn off the power and turn it on Refer to P.106 again to get the system started. Check No.7 Refer to P.107 Error displayed again?

  • Page 106: Output Over Current Detection

    SiBE05-311 Troubleshooting 4.17 Output Over Current Detection Remote Controller Display Method of An output over-current is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. Decision A speed error occurs while the compressor is running.
  • Page 107 Troubleshooting SiBE05-311 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Check No.7 reconnected for part replacement, for example, and the system is interrupted by an output over-current, Refer to P.107 take the following procedure.

  • Page 108: Insufficient Gas

    SiBE05-311 Troubleshooting 4.18 Insufficient Gas Remote Controller Display Method of Gas shortage detection I : A gas shortage is detected by checking the CT-detected input current Malfunction value and the compressor running frequency. Gas shortage detection II : A gas shortage is detected by checking the difference between Detection indoor unit heat exchanger temperature and room temperature as well as the difference between outdoor unit heat exchanger temperature and room temperature.
  • Page 109 Troubleshooting SiBE05-311 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Refer to P.104 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.6 * Room temperature thermistor Refer to P.106...

  • Page 110: Over-Voltage Detection

    SiBE05-311 Troubleshooting 4.19 Over-voltage Detection Remote Controller Display Method of An abnormal voltage rise is detected by checking the specified over-voltage detection circuit. Malfunction Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer Decision (The voltage is over 400V).

  • Page 111: High Pressure Control In Cooling

    Troubleshooting SiBE05-311 4.20 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the Malfunction temperature being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction Activated when the temperature being sensed by the heat exchanger thermistor rises above Decision...
  • Page 112 SiBE05-311 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Check the installation space. Refer to P.104 Check No.7 Abnormal Check No.6 Installation condition Change the air outlet grille check position.

  • Page 113: Check

    Check SiBE05-311 5. Check How to Check 5.1.1 Electronic Expansion Valve Check Check No.4 Conduct the followings to check the electronic expansion valve (EV). 1. Check to see if the EV connector is correctly inserted in the PCB. Compare the EV unit and the connector number.

  • Page 114: Four Way Valve Performance Check

    SiBE05-311 Check 5.1.2 Four Way Valve Performance Check Check No.5 Turn off the power and turn it on again. ∗ Four way valve coil Cooling / dry : No continuity Start the heating-mode run. Heating : Continuity S80 voltage at DC 180-220 V with Replace the outdoor unit compressor on? PCB.

  • Page 115: Thermistor Resistance Check

    Check SiBE05-311 5.1.3 Thermistor Resistance Check Check No.6 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.

  • Page 116: Installation Condition Check

    SiBE05-311 Check 5.1.4 Installation Condition Check Check No.7 Installation condition check Check the allowable Abnormal Change the position of the air dimensions of the air suction discharge grille or the and discharge area. installation location. Normal Does the discharged air from other outdoor Change the position of the air unit cause an increase of discharge grille or the...

  • Page 117: Discharge Pressure Check

    Check SiBE05-311 5.1.5 Discharge Pressure Check Check No.8 Discharge pressure check High Replace compessor. Open the stop valve. Is the stop valve open? Is the Replace the pipe installed at connection pipe deformed? the site. Dirty Are the heat exchanger and Clean.

  • Page 118: Power Supply Waveforms Check

    SiBE05-311 Check 5.1.7 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between pins 1 and 3 on the terminal board, and check the waveform disturbance. Check to see if the power supply waveform is a sine wave (Fig.1). Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2) [Fig.1] [Fig.2]...

  • Page 119: Capacitor Voltage Check

    Check SiBE05-311 5.1.9 Capacitor Voltage Check Check No.12 < Measuring method > Before measuring, operate the unit for several minutes, then shut down the operation by force using the circuit breaker. If the unit is shut down using the remote controller instead of the circuit breaker, the capacitor discharges the electric load, thus disallowing accurate measurement.

  • Page 120: Hall Ic Check

    SiBE05-311 Check <Measuring positions> MULTIMETER (DC, VOLTAGA RANGE) TRM1 S90 THERMISTOR LEAD WIRE S80 FOUR WAY VALVE LEAD WIRE (Heating Pump only) S70 FAN MOTOR LEAD WIRE REACTOR LEAD WIRE COMPRESSOR LEAD WIRE (R2956) 5.1.11 Hall IC Check Check No.16 1.
  • Page 121 Check SiBE05-311 Service Diagnosis...

  • Page 122: Part 7 Removal Procedure

    SiBE05-311 Part 7 Removal Procedure 1. Indoor Unit...................114 1.1 Removal of the Air Filter / Front Grille ..........114 1.2 Removal of the Front Panel..............117 1.3 Removal of the Horizontal Blade ............119 1.4 Removal of the Signal Receiver Unit / Swing Motor......120 1.5 Removal of the Discharge Grille............

  • Page 123: Indoor Unit

    Indoor Unit SiBE05-311 1. Indoor Unit Removal of the 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. Features Ceiling-suspended type and floor- mounted type are provided.
  • Page 124 SiBE05-311 Indoor Unit Step Procedure Points Holding the tab at the center of filter frame, pull the air filter forward. Air filter (R2980) Remove the air filter by Installing filters can be done pulling along the slide easily by sliding-in along the guide.
  • Page 125 Indoor Unit SiBE05-311 Step Procedure Points To remove the front grille, disengage hooks at three locations. 4. Remove the side panel cover. Side panel cover Remove the side panel cover for removing of suspension parts. Note: If it is difficult to remove side panel from outside with finger, remove front panel first, then...

  • Page 126: Removal Of The Front Panel

    SiBE05-311 Indoor Unit Removal of the 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 four screws located at the back of the front panel. Front panel (R2986) Note:...
  • Page 127 Indoor Unit SiBE05-311 Step Procedure Points Disengage the three hooks of the front panel Hook located at discharge port. (R2989) Press A-section slightly at the center of the front panel, and disengage hook. Remove the front panel. Caution For ceiling-suspended type, be careful that the front panel may fall when hooks are disengaged.

  • Page 128: Removal Of The Horizontal Blade

    SiBE05-311 Indoor Unit Removal of the 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 (R2992) Deflect the three center bearings to left side slightly, and disengage shaft of blade.

  • Page 129: Removal Of The Signal Receiver Unit / Swing Motor

    Indoor Unit SiBE05-311 Removal of the 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. Disengage the two hooks (left and right sides) to remove the...

  • Page 130: Removal Of The Discharge Grille

    SiBE05-311 Indoor Unit Removal of the 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 two screws securing discharge grille. Discharge grille (R2999) Disengage the two hooks (left and right sides) and remove the...

  • Page 131: Removal Of The Drain Pan

    Indoor Unit SiBE05-311 Removal of the 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 132: Removal Of The Electrical Box / Pcb

    SiBE05-311 Indoor Unit Removal of the 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 the indoor heat exchanger thermistor harness.
  • Page 133 Indoor Unit SiBE05-311 Step Procedure Points Power supply PCB. Control PCB. (R3009) The illustration shows the control PCB (indoor unit). (R2958) Disconnect the terminals from the terminal strip board. Terminal strip board GRN/YLW Power supply PCB. (R3011) Removal Procedure...
  • Page 134 SiBE05-311 Indoor Unit Step Procedure Points The illustration shows the power supply PCB (indoor unit). (R2959) 2. Remove the electrical box. Slide the box to direction first to disengage Remove the two hooks. screws. Remove the electrical box by sliding it to disengage the hooks located at the opposite side of the...

  • Page 135: Removal Of The Fan Rotor / Fan Motor

    Indoor Unit SiBE05-311 Removal of the Fan Rotor / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the three fan rotor covers. (Securing hooks are located at A and B-section.) A-section...
  • Page 136 SiBE05-311 Indoor Unit Step Procedure Points Remove the two screws to remove fan motor fixtures. Remove the bearing fixture. Bearing Fan motor fixture Bearing fixture (R3018) Loosen the shaft supporting section using a hexagonal wrench (for M6) to remove the fan motor. Removal Procedure...

  • Page 137: Removal Of The Heat Exchanger

    Indoor Unit SiBE05-311 Removal of the Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Be sure to conduct pump Heat exchanger side down operation before disassembling refrigerant Auxiliary flexible tube pipe.
  • Page 138 SiBE05-311 Indoor Unit Step Procedure Points Hooking piece is Warning! located on the piping Do not contaminate any gas side of the heat exchanger. (including air) other than the specified refrigerant (R410A) into refrigerating cycle. (Contaminating of air or other gas causes abnormal temperature rise in refrigerating cycle, and this...

  • Page 139: Outdoor Unit

    Outdoor Unit SiBE05-311 2. Outdoor Unit Removal of External Casing Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points The stop valve cover can be removed when the fixed screw is Stop valve cover...
  • Page 140 SiBE05-311 Outdoor Unit Step Procedure Points The top plate and the Top plate front plate are constructed in a monoblock. Remove the three screws on the right side and the two screws on the front plate. Front plate (R1452) Remove the three screws on the left side.
  • Page 141 Outdoor Unit SiBE05-311 Step Procedure Points The front plate and the Sectional view at the front. left side plate can be Top plate removed when the one fixed screw is removed. The edge of the top plate gets into this groove. Left side plate (R1737)

  • Page 142: Removal Of Bell Mouth And Left Side Plate

    SiBE05-311 Outdoor Unit Removal of Bell mouth and Left Side Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points The bell mouth is Remove the bell mouth from attached to the front the front plate after removing Hook A...

  • Page 143: Removal Of Pcb And Electrical Box

    Outdoor Unit SiBE05-311 Removal of PCB and 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 shelter. The shelter has five hooks. Be sure to avoid forgetting to Undo the five hooks restore the shelter and to...
  • Page 144 SiBE05-311 Outdoor Unit Step Procedure Points Remove the four screws fixing the PCB. Disconnect the wire harness. Disconnect the two connectors of the reactor. Removal Procedure...
  • Page 145 Outdoor Unit SiBE05-311 Step Procedure Points Undo the eight hooks The PCB has eight hooks. and the PCB can be disengaged. Disconnect the three wires from the PCB. Removal Procedure...
  • Page 146 SiBE05-311 Outdoor Unit Step Procedure Points The PCB can completely be released. 3. Remove the electrical box. Remove the two screws Electrical box fixing the electrical box. (R3053) Removal Procedure...
  • Page 147 Outdoor Unit SiBE05-311 Step Procedure Points Lift and remove the electrical box. 4. Remove the molded interconnect device (MID). Remove the one screw fixing the MID. Removal Procedure...
  • Page 148 SiBE05-311 Outdoor Unit Step Procedure Points Slide the MID upward and release. Removal Procedure...

  • Page 149: Removal Of Propeller Fan And Fan Motor

    Outdoor Unit SiBE05-311 Removal of Propeller Fan and Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the fan motor Remove the external plates connector S70.
  • Page 150 SiBE05-311 Outdoor Unit Step Procedure Points Remove the fan motor. Removal Procedure...

  • Page 151: Removal Of Compressor Noise Absorption Pad

    Outdoor Unit SiBE05-311 Removal of Compressor Noise Absorption Pad Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side plate. Remove the three screws for removing the right side plate.
  • Page 152 SiBE05-311 Outdoor Unit Step Procedure Points Pull out the noise absorption pad for the body. Noise absorption pad for the body (R1482) Pull out the top pad of Since the slit prepared for the noise absorption the piping on the noise (a).

  • Page 153: Removal Of Partition Plate And Reactor

    Outdoor Unit SiBE05-311 Removal of Partition Plate and Reactor 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 partition plate. Remove the two screws fixing the partition plate.
  • Page 154 SiBE05-311 Outdoor Unit Step Procedure Points When restoring the partition plate, fit the hook into the bottom frame. Hook (R1487) 2. Remove the reactor. The reactor can be released by removing the fixed screw. 3. Remove the reactor assembly. Remove the one screw fixing the reactor assembly to the bottom frame.
  • Page 155 Outdoor Unit SiBE05-311 Step Procedure Points Slide the reactor assembly this side and release. Removal Procedure...

  • Page 156: Removal Of Four Way Valve And Motor Valve

    SiBE05-311 Outdoor Unit Removal of Four Way Valve and Motor Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1. Remove the parts around the four way valve. Remove the terminal cover and the lead wires of the...
  • Page 157 Outdoor Unit SiBE05-311 Step Procedure Points Remove the motor valve coil. Motor valve coil (R1494) Confirm that the refrigerant is completely Caution empty in the refrigerant Be careful about four-way circuit before starting valve, pipes and so on, which work. were heated up by a gas Four-way valve...
  • Page 158 SiBE05-311 Outdoor Unit Step Procedure Points Heat up the brazing parts and withdraw the pipes connected to the In case that the removal seems four way valve by pliers to be hard; and so on. 1. Remove the piping connection part (brazing part) which is easy to remove and restore.

  • Page 159: Removal Of Compressor

    Outdoor Unit SiBE05-311 Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the parts around Be careful so as not to burn the compressor.
  • Page 160 SiBE05-311 Outdoor Unit Step Procedure Points The mounting nut for Remove the four way valve the compressor is only and the motor valve also so Motor valve one piece. as not to be burnt out. coil Remove the nut by an open-end wrench.
  • Page 161 Outdoor Unit SiBE05-311 Step Procedure Points Confirm that the refrigerant is completely empty in the refrigerant Warning! circuit before starting Since it may happen that work. refrigeration oil in the compressor will catch fire, Be sure to apply prepare wet cloth so as to nitrogen’s replacement extinguish the fire quickly.

  • Page 162: Part 8 Others

    SiBE05-311 Part 8 Others 1. Others ....................154 1.1 Test Run from the Remote Controller..........154 1.2 Jumper Settings................... 155 Others...

  • Page 163: Others

    Others SiBE05-311 1. Others Test Run from the Remote Controller For Heat pump In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable temperature. Trial operation may be disabled in either mode depending on the room temperature. After trial operation is complete, set the temperature to a normal level.

  • Page 164: Jumper Settings

    SiBE05-311 Others Jumper Settings 1.2.1 When Two Units are Installed in One Room When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. How to set the different addresses Control PCB of the indoor unit (1) Remove the front grille.
  • Page 165 Others SiBE05-311 Others...

  • Page 166: Part 9 Appendix

    SiBE05-311 Part 9 Appendix 1. Piping Diagrams..................158 1.1 Indoor Units ..................158 1.2 Outdoor Units ..................159 2. Wiring Diagrams..................161 2.1 Indoor Units ..................161 2.2 Outdoor Units ..................162 Appendix...

  • Page 167: Piping Diagrams

    Piping Diagrams SiBE05-311 1. Piping Diagrams Indoor Units FLKS25BVMB, FLKS35BVMB, FLK25BVMB, FLK35BVMB FLXS25BVMB, FLXS35BVMB, FLX25BVMB, FLX35BVMB INDOOR UNIT CuT ) HEAT EXCHANGER THERMISTOR ON HEAT EXCH. FIELD PIPING SIROCCO FAN ( 6.4CuT ) FAN MOTOR FLX25,35- FIELD PIPING CuT )

  • Page 168: Outdoor Units

    SiBE05-311 Piping Diagrams Outdoor Units RKS25 / 35BVMB, RK35BVMB OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.9CuT 7.9CuT HEAT EXCHANGER THERMISTOR MOTOR OPERATED VALVE 7.9CuT 6.4CuT 6.4CuT MUFFLER WITH FILTER PROPELLER FAN MUFFLER WITH FILTER MUFFLER WITH FILTER FIELD PIPING 6.4CuT ( 6.4CuT ) LIQUID STOP...
  • Page 169 Piping Diagrams SiBE05-311 RXS25 / 35BVMB, RX35BVMB OUTDOOR UNIT OUTDOOR TEMPARATURE HEAT EXCHANGER THERMISTOR 7.9CuT 7.9CuT HEAT EXCHANER THERMISTOR MOTOR OPERATED VALVE 7.9CuT 6.4CuT 6.4CuT MUFFLER FILTER WITH FILTER PROPELLER FAN LIQUID RECEIVER WITH FILTER 9.5CuT MUFFLER WITH FILTER FOUR WAY 6.4CuT FIELD PIPING VALVE...

  • Page 170: Wiring Diagrams

    SiBE05-311 Wiring Diagrams 2. Wiring Diagrams Indoor Units FLKS25BVMB, FLKS35BVMB, FLK25BVMB, FLK35BVMB FLXS25BVMB, FLXS35BVMB, FLX25BVMB, FLX35BVMB 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...

  • Page 171: Outdoor Units

    Wiring Diagrams SiBE05-311 Outdoor Units RKS25 / 35BVMB t˚ indoor ( FIN ) PCB1 PCB2 MRM20 TRM1 MRM10 3.15A ˚C FIELD WIRING. NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. t˚ t˚ t˚ X30A outdoor : TERMINAL STRIP ( OUTDOOR ) ( DISCHARGE ) C9, C11...
  • Page 172 SiBE05-311 Wiring Diagrams RXS25 / 35BVMB t˚ indoor ( FIN ) PCB1 PCB2 MRM20 TRM1 MRM10 3.15A ˚C FIELD WIRING. MRCW NOTE 1.REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. t˚ t˚ t˚ X30A : TERMINAL STRIP outdoor C9 , C11 ( OUTDOOR ) ( DISCHARGE ) C12~C15...
  • Page 173 Wiring Diagrams SiBE05-311 Appendix...

  • Page 174: Index

    SiBE05-311 Index Numerics EA ................85 earth ..............123 00 ................75 electrical box ..........125, 134 3 minutes stand-by..........27, 34 electrical box cover ..........123 electrical box temperature rise ....... 93 electronic expansion valve check......104 A1................76 electronic expansion valve control ......40 A5................77 error codes and description........
  • Page 175 SiBE05-311 PCB ..............134 PCB (1) ..............15 indoor heat exchanger thermistor .....29, 30 PCB (2) ..............15 indoor unit PCB abnormality ........76 photocatalytic deodorizing filter ......27 input current control ..........35 PI control ..............33 input over current detection........84 piping diagrams ............
  • Page 176 SiBE05-311 signal transmission error (between indoor and outdoor units) ....81 specifications.............6 stop valve cover ............130 SW1 ................12 SW2 ................12 swing motor............120 terminal strip............124 test run ..............154 thermistor indoor heat exchanger thermistor ....123 thermistor or related abnormality (indoor unit) ..80 thermistor or related abnormality (outdoor unit) ..91 thermistor resistance check ........106 timer operation ............63 troubleshooting..........68, 75...
  • Page 177 SiBE05-311 Index...

  • Page 178: Drawings & Flow Charts

    SiBE05-311 Drawings & Flow Charts ARC433A series............74 jumper settings ............. 155 automatic air flow control ........21 automatic operation..........23 auto-swing...............20 main structural parts cooling only model ........... 28 heat pump model ..........28 compressor lock ............83 mode hierarchy ............31 compressor protection function .......34 moisture protection function 1 ........
  • Page 179 SiBE05-311 Drawings & Flow Charts...
  • Page 180 Daikin Europe N.V. is approved by LRQA for its Quality Daikin units comply with the European regulations that Management System in accordance with the ISO9001 guarantee the safety of the product. standard. ISO9001 pertains to quality assurance regarding design, development, manufacturing as well as to services related to the product.

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