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: Operating Manual , Installation Manual
Inverter Pair
Floor / Ceiling Suspended Dual Type
B-Series
[Applied Models]
Inverter Pair : Cooling Only
Inverter Pair : Heat Pump
SiBE05 - 513A

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Summary of Contents for Daikin FLKS25BVMB

  • Page 1 SiBE05 - 513A Inverter Pair Floor / Ceiling Suspended Dual Type B-Series [Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump...
  • Page 2 SiBE05-513A Inverter Pair B-Series Cooling Only Indoor Unit FLKS25BVMB FLKS25BAVMB FLKS35BVMB FLKS35BAVMB Outdoor Unit RKS25DVMB RKS25D2VMB RKS25D3VMB RKS35DVMB RKS35D2VMB RKS35D3VMB Heat Pump Indoor Unit FLXS25BVMB FLXS25BAVMB FLXS35BVMB FLXS35BAVMB Outdoor Unit RXS25DVMB RXS25D2VMB RXS25D3VMB RXS35DVMB RXS35D2VMB RXS35D3VMB Table of Contents...

  • Page 3: Table Of Contents

    SiBE05-513A 1. Introduction .....................v 1.1 Safety Cautions ..................v Part 1 List of Functions ..............1 1. List of Functions ..................2 Part 2 Specifications ..............5 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................8 Part 3 Printed Circuit Board Connector Wiring Diagram ... 11 1.
  • Page 4 SiBE05-513A Part 5 System Configuration............47 1. System Configuration................48 2. Instruction....................49 2.1 Safety precautions..................49 2.2 Names of parts ..................51 2.3 Preparation before Operation..............54 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........57 2.5 Adjusting the Air Flow Direction .............59 2.6 POWERFUL Operation ................61 2.7 OUTDOOR UNIT SILENT Operation .............62 2.8 HOME LEAVE Operation ...............63...
  • Page 5 SiBE05-513A Part 7 Removal Procedure ............121 1. Indoor Unit...................122 1.1 Removal of the Air Filter / Front Grille ..........122 1.2 Removal of the Front Panel..............125 1.3 Removal of the Horizontal Blade............127 1.4 Removal of the Signal Receiver Unit / Swing Motor......128 1.5 Removal of the Discharge Grille............129 1.6 Removal of the Drain Pan ..............130 1.7 Removal of the Electrical Box / PCB ............131...

  • Page 6: Introduction

    SiBE05-513A Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.

  • Page 7: Cautions Regarding Products After Repair

    Introduction SiBE05-513A Warning 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

    SiBE05-513A Introduction Warning Be sure to use the specified cable to connect between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals. Improper connections can cause excessive heat generation or fire.

  • Page 9: Using Icons

    Introduction SiBE05-513A 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

    SiBE05-513A Part 1 List of Functions 1. List of Functions ..................2 List of Functions...

  • Page 11: List Of Functions

    List of Functions SiBE05-513A 1. List of Functions Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, –10 –10 Virustatic Functions Operation Limit for Cooling (°CDB) Basic –15 Function Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter Air Purifying Filter with Photocatalytic PAM Control...
  • Page 12 SiBE05-513A List of Functions Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, –10 –10 Virustatic Functions Operation Limit for Cooling (°CDB) Basic –15 Function Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter Air Purifying Filter with Photocatalytic PAM Control —...
  • Page 13 List of Functions SiBE05-513A List of Functions...

  • Page 14: Part 2 Specifications

    SiBE05-513A Part 2 Specifications 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................8 Specifications...

  • Page 15: Specifications

    Specifications SiBE05-513A 1. Specifications Cooling Only 50Hz 230V Indoor Units FLKS25BVMB FLKS35BVMB Model Outdoor Units RKS25D(2)VMB RKS35D(2)VMB 2.5 (1.3~3.0) 3.5 (1.4~3.8) Capacity Btu/h 8,500 (4,400~10,200) 11,900 (4,750~12,950) Rated (Min.~Max.) kcal/h 2,150 (1,110~2,580) 3,010 (1,200~3,260) Moisture Removal Running Current (Rated) Power Consumption...
  • Page 16 SiBE05-513A Specifications 50Hz 230V Indoor Units FLKS25BAVMB FLKS35BAVMB Model Outdoor Units RKS25D3VMB RKS35D3VMB 2.5 (1.3~3.0) 3.5 (1.4~3.8) Capacity Btu/h 8,500 (4,400~10,200) 11,900 (4,750~12,950) Rated (Min.~Max.) kcal/h 2,150 (1,110~2,580) 3,010 (1,200~3,260) Moisture Removal Running Current (Rated) Power Consumption 780 (300~960) 1,160 (300~1,270) Rated (Min.~Max.) Power Factor 78.9...

  • Page 17: Heat Pump

    Specifications SiBE05-513A Heat Pump 50Hz 230V Indoor Units FLXS25BVMB FLXS35BVMB Model RXS25D(2)VMB RXS35D(2)VMB Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.5) 3.5 (1.4~3.8) 4.0 (1.4~5.0) Capacity Btu/h 8,500 (4,400~10,200) 11,600 (4,400~15,350) 11,900 (4,750~12,950) 13,650 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,150 (1,110~2,580) 2,920 (1,110~3,870) 3,010 (1,200~3,260)
  • Page 18 SiBE05-513A Specifications 50Hz 230V Indoor Units FLXS25BAVMB FLXS35BAVMB Model RXS25D3VMB RXS35D3VMB Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.5) 3.5 (1.4~3.8) 4.0 (1.4~5.0) Capacity Btu/h 8,500 (4,400~10,200) 11,600 (4,400~15,350) 11,900 (4,750~12,950) 13,650 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,150 (1,110~2,580) 2,920 (1,110~3,870) 3,010 (1,200~3,260) 3,440 (1,200~4,300)
  • Page 19 Specifications SiBE05-513A Specifications...

  • Page 20: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE05-513A 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 SiBE05-513A 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors Connector for swing motor Connector for fan motor Connector for centralized control (HA) Connector for display PCB 5) S25, S27, Connector for control PCB Connector for signal receiver PCB (RTH) Connector for room temperature thermistor...
  • Page 22 SiBE05-513A 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 EX511 REV 12...

  • Page 23: Outdoor Unit

    Printed Circuit Board Connector Wiring Diagram SiBE05-513A Outdoor Unit Connectors Connector for filter PCB Connector for control PCB Connector for electronic expansion valve coil Connector for compressor motor Connector for overload protector Connector for fan motor Connector for four way valve coil Connector for thermistors (outdoor air, heat exchanger, discharge pipe) HC3, HC4, HL3, HN3...
  • Page 24 SiBE05-513A Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Filter PCB V3 V2 FU3(20A) (R4293) PCB(2): Control PCB (outdoor unit) S40 LED A FU2(3.15A) FU1(3.15A) (R4605) Printed Circuit Board Connector Wiring Diagram...
  • Page 25 Printed Circuit Board Connector Wiring Diagram SiBE05-513A Printed Circuit Board Connector Wiring Diagram...

  • Page 26: Part 4 Function And Control

    SiBE05-513A 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 Thermostat Control.................24 1.7 NIGHT SET Mode ..................25 1.8 HOME LEAVE Operation ...............26 1.9 Inverter POWERFUL Operation .............27 1.10 Other Functions..................28 2.

  • Page 27: Main Functions

    Main Functions SiBE05-513A 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 SiBE05-513A 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 SiBE05-513A 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

    SiBE05-513A 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 trouble shooting for fan motor on page 85.

  • Page 31: Programme Dry Function

    Main Functions SiBE05-513A 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

    SiBE05-513A 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: Thermostat Control

    Main Functions SiBE05-513A Thermostat Control Thermostat control is based on the difference between the room temperature and the setpoint. Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference is above the zone C after being in the zone A. The system resumes from defrost control in any zones except A.

  • Page 34: Night Set Mode

    SiBE05-513A Main Functions 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 raises the temperature setting slightly in the case of cooling, or lowers it slightly in the case of heating, for economical operations.

  • Page 35: Home Leave Operation

    Main Functions SiBE05-513A 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 36: Inverter Powerful Operation

    SiBE05-513A Main Functions Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Details of the When POWERFUL button is pushed in each operation mode, the fan speed / setting temperature will be converted to the following states in a period of twenty minutes.

  • Page 37: Other Functions

    Main Functions SiBE05-513A 1.10 Other Functions 1.10.1 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 38: Function Of Thermistor

    SiBE05-513A Function of Thermistor Function of Thermistor Heat Pump Model Four way valve Compressor (R3305) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. The system sets a target discharge temperature according to the outdoor and indoor heat Exchanger exchanger temperature, and controls the electronic expansion valve opening so that the Thermistor...

  • Page 39: Cooling Only Model

    Function of Thermistor SiBE05-513A Cooling Only Model Compressor (R2828) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. The system sets a target discharge temperature according to the outdoor and indoor heat Exchanger exchanger temperature, and controls the electronic expansion valve opening so that the Thermistor (DCB) target discharge temperature can be obtained.

  • Page 40: Control Specification

    SiBE05-513A 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 SiBE05-513A 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 SiBE05-513A Control Specification 2. Determine upper limit frequency Set a minimum value as an upper limit frequency among the frequency upper limits of the following functions: Compressor protection, input current, discharge pipes, freeze-up protection, dew prevention, fin thermistor temperature. 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.

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

    Control Specification SiBE05-513A Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline Operate the inverter in the open phase operation with the conditions including the preheating command from the discharge pipe temperature. Detail Preheating ON Condition When the discharge pipe temperature is below 10ºC, inverter in open phase operation starts.

  • Page 44: Compressor Protection Function

    SiBE05-513A Control Specification 3.3.4 3-minute Standby Prohibit to turn ON the compressor for 3 minutes after turning it off. (Except when defrosting. (Only for Heat Pump Model).) 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows.

  • Page 45: Input Current Control

    Control Specification SiBE05-513A Input Current Control Outline The microcomputer calculates the input current during the compressor is running, and set the frequency upper limit from such input current. In case of heat pump model, this control is the upper limit control function of the frequency which takes priority of the lower limit of four way valve activating compensation.

  • Page 46: Freeze-Up Protection Control

    SiBE05-513A Control Specification Freeze-up Protection Control Outline During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings. Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from...

  • Page 47: Fan Control

    Control Specification SiBE05-513A Fan Control Outline Fan control is carried out with following functions. 1. Fan control when defrosting 2. Fan OFF delay when stopped 3. ON/OFF control when cooling operation 4. Fan control when forced operation 5. Fan control in low noise mode 6.

  • Page 48: Defrost Control

    SiBE05-513A Control Specification 3.10 Defrost Control Outline Heat Pump Only Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing. Detail Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature.

  • Page 49: Electronic Expansion Valve Control

    Control Specification SiBE05-513A 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 50 SiBE05-513A Control Specification 3.11.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 3.11.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
  • Page 51 Control Specification SiBE05-513A 3.11.7 Control when frequency is changed When the target discharge pipe temperature control is active, if the target frequency is changed for a specified value in a certain time period, cancel the target discharge pipe temperature control and change the target opening of the electronic expansion valve according to the shift. 3.11.8 Target Discharge Pipe Temperature Control Obtain the target discharge pipe temperature from the indoor and outdoor heat exchanger...

  • Page 52: Malfunctions

    SiBE05-513A 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. Fin thermistor 4. Outdoor air thermistor 3.12.2 Detection of Overload Over Current Outline In order to protect the inverter, detect an excessive output current, and for protecting...

  • Page 53: Forced Operation Mode

    Control Specification SiBE05-513A Detail I Judgment by power consumption When an output frequency is exceeds 55 Hz and the input current is less than specified value, the adjustment is made for insufficient gas. II Judgment by discharge pipe temperature When discharge pipe temperature is 30°C higher than target value and the electronic expansion value opening is 480 pulses (max.), the adjustment is made for insufficient gas.

  • Page 54: Facility Setting Jumper (Cooling At Low Outdoor Temperature)

    SiBE05-513A Control Specification 3.15 Facility Setting Jumper (cooling at low outdoor temperature) Outline This function is limited only for facilities (the target of air conditioning is equipment (such as computer)). Never use it in a residence or office (the space where there is a human). Detail You can expand the operation range to –15°C by cutting jumper 8 (J8) on the PCB.
  • Page 55 Control Specification SiBE05-513A Function and Control...

  • Page 56: Part 5 System Configuration

    SiBE05-513A Part 5 System Configuration 1. System Configuration................48 2. Instruction....................49 2.1 Safety precautions..................49 2.2 Names of parts ..................51 2.3 Preparation before Operation..............54 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........57 2.5 Adjusting the Air Flow Direction .............59 2.6 POWERFUL Operation ................61 2.7 OUTDOOR UNIT SILENT Operation .............62 2.8 HOME LEAVE Operation ...............63...

  • Page 57: System Configuration

    System Configuration SiBE05-513A 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 58: 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, if for some reason any refrigerant happens to leak into the room, make sure it does not come in contact with any flame as of gas heaters, kerosene heaters or gas range.

  • Page 59: Installation Site

    Instruction SiBE05-513A • 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. In certain conditions, moisture in the air may condense and drip.

  • Page 60: Names Of Parts

    SiBE05-513A Instruction Names of parts Names of parts Indoor Unit The indoor unit can be installed either to the ceiling or to a wall. The descriptions contained in this man- ual 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 61 Instruction SiBE05-513A Outdoor Unit Indoor Unit 1. Louvers (vertical blades): 13. Indoor unit ON/OFF switch: (page 10.) The louvers are inside of the air outlet. • Push this switch once to start operation. (page 12.) Push once again to stop it. •...

  • Page 62: Remote Controller

    SiBE05-513A 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. (AUTO/DRY/COOL/HEAT/FAN) (page 10.) 2.

  • Page 63: Preparation Before Operation

    Instruction SiBE05-513A Preparation before Operation Preparation Before Operation To set the batteries Position + and – correctly! 1. Press with a finger and slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION About batteries •...
  • Page 64 SiBE05-513A Instruction Preparation Before Operation To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote control- ler, such as a curtain, the unit will not operate. •...
  • Page 65 Instruction SiBE05-513A To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. HOME LEAVE ON/OFF Holding down “ ” or “ ” button rap- TEMP POWERFUL idly increases or decreases the time dis- play.

  • Page 66: Auto · Dry · Cool · Heat · Fan Operation

    SiBE05-513A Instruction AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode.
  • Page 67 Instruction SiBE05-513A To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ” “ ”...

  • Page 68: Adjusting The Air Flow Direction

    SiBE05-513A Instruction Adjusting the Air Flow Direction Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. To adjust the horizontal blade (flap) 1. Press “SWING button”. The display will light up and the flaps will begin to swing.
  • Page 69 Instruction SiBE05-513A 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 70: Powerful Operation

    SiBE05-513A Instruction POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity . To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used HOME LEAVE...

  • Page 71: Outdoor Unit Silent Operation

    Instruction SiBE05-513A OUTDOOR UNIT SILENT Operation OUTDOOR UNIT SILENT Operation OUTDOOR UNIT SILENT operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is conve- nient during night. To start OUTDOOR UNIT SILENT operation 1.

  • Page 72: Home Leave Operation

    SiBE05-513A Instruction HOME LEAVE Operation 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 HOME LEAVE...
  • Page 73 Instruction SiBE05-513A 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 74: Timer Operation

    SiBE05-513A Instruction TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER opera- tion •...
  • Page 75 Instruction SiBE05-513A 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 HOME LEAVE ON/OFF the point you like.

  • Page 76: Care And Cleaning

    SiBE05-513A Instruction 2.10 Care and Cleaning Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. Front grille 1.

  • Page 77: Air Filter

    Instruction SiBE05-513A Filters 1. Open the front grille. (page 22) 2. Pull out the air filters. • Push upwards the tab at the center of each air fil- ter, then pull it down. 3. Take off the air purifying filter, photocatalytic deodorizing filter.

  • Page 78: Before A Long Idle Period

    SiBE05-513A 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 drain comes smoothly out of the drain hose during COOL or DRY operation. If no drain water is seen, water may be leaking from the indoor unit.

  • Page 79: Troubleshooting

    Instruction SiBE05-513A 2.11 Troubleshooting Trouble Shooting 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 80: Check Again

    SiBE05-513A 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 81: Disposal Requirements

    Instruction SiBE05-513A Call the service shop immediately. WARNING 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 82: Fault Diagnosis

    SiBE05-513A Instruction Fault diagnosis FAULT DIAGNOSIS BY REMOTE CONTROLLER In the ARC433A series, the temperature display sections on the main unit indicate corresponding codes. 1. When the TIMER CANCEL button is held down for 5 seconds, a “ ” indication flashes on the temperature display section.
  • Page 83 Instruction SiBE05-513A System Configuration...

  • Page 84: Part 6 Service Diagnosis

    SiBE05-513A Part 6 Service Diagnosis 1. Caution for Diagnosis................76 2. Problem Symptoms and Measures ............77 3. Service Check Function ................78 4. Troubleshooting ..................81 4.1 Error Codes and Description ..............81 4.2 Indoor Unit PCB Abnormality ..............82 4.3 Freeze-up Protection Control or High Pressure Control......83 4.4 Fan Motor (AC Motor) or Related Abnormality........85 4.5 Thermistor or Related Abnormality (Indoor Unit)........86 4.6 Signal Transmission Error (between Indoor and Outdoor Unit) .....87...

  • Page 85: Caution For Diagnosis

    Caution for Diagnosis SiBE05-513A 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 86: Problem Symptoms And Measures

    SiBE05-513A Problem Symptoms and Measures Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page None of the Units Check the power supply. Check to make sure that the rated voltage is — Operates. supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...

  • Page 87: Service Check Function

    Service Check Function SiBE05-513A Service Check Function In the ARC433A series remote controller, the temperature display sections on the main unit indicate corresponding codes. Check Method 1 1. When the timer cancel button is held down for 5 seconds, a “00” indication flashes on the temperature display section.
  • Page 88 SiBE05-513A Service Check Function Check Method 2 1. Enter the diagnosis mode. Press the 3 buttons (TEMP ,TEMP , MODE) simultaneously. (R4272) The digit of the number of tens blinks. Try again from the start when the digit does not blink. (R4273) 2.
  • Page 89 Service Check Function SiBE05-513A 5. Press the TEMP button. Press TEMP or TEMP and change the digit until you hear the sound of “beep”. (R4277) 6. Diagnose by the sound. “ pi ” : The both numbers of tens and units do not accord with the error code. “...

  • Page 90: Troubleshooting

    SiBE05-513A Troubleshooting Troubleshooting Error Codes and Description Reference Code Indication Description Page System — Normal Insufficient gas Over-voltage detection Signal transmission error (between indoor and outdoor unit) Unspecified voltage (between indoor and outdoor unit) Indoor Indoor unit PCB abnormality Unit Freeze-up protection control or high pressure control Fan motor or related abnormality Heat exchanger temperature thermistor abnormality...

  • Page 91: Indoor Unit Pcb Abnormality

    Troubleshooting SiBE05-513A 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 92: Freeze-Up Protection Control Or High Pressure Control

    SiBE05-513A Troubleshooting Freeze-up Protection Control High Pressure Control Remote Controller Display Method of High pressure control (heat pump model only) Malfunction During heating operations, the temperature detected by the indoor heat exchanger thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection Freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
  • Page 93 Troubleshooting SiBE05-513A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Refer to P.115 Check the air passage. Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 94: Fan Motor (Ac Motor) Or Related Abnormality

    SiBE05-513A 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 abnormal fan motor operation. Malfunction Detection Malfunction When the detected rotation speed is less than 50% of the HH tap under maximum fan motor rotation demand.

  • Page 95: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting SiBE05-513A Thermistor or Related Abnormality (Indoor Unit) Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor operation∗.

  • Page 96: Signal Transmission Error (Between Indoor And Outdoor Unit)

    SiBE05-513A Troubleshooting Signal Transmission Error (between Indoor and Outdoor Unit) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of the data is abnormal.

  • Page 97: Unspecified Voltage (Between Indoor And Outdoor Units)

    Troubleshooting SiBE05-513A Unspecified Voltage (between Indoor and Outdoor Units) Remote Controller Display Method of The supply power is detected for its requirements (different from pair type and multi type) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction The pair type and multi type are interconnected. Decision Conditions Supposed...

  • Page 98: Outdoor Unit Pcb Abnormality

    SiBE05-513A Troubleshooting Outdoor Unit PCB Abnormality Remote Controller Display Method of The system follows the microprocessor program to make sure it runs normally. The system checks to see if the zero-cross signal comes in properly. Malfunction Detection Malfunction The microprocessor program runs out of control. The zero-cross signal is not detected.

  • Page 99: Ol Activation (Compressor Overload)

    Troubleshooting SiBE05-513A OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will be shut down. The error counter will reset itself if this or any other error does not occur during the following Decision 60-minute compressor running time (total time).

  • Page 100: Compressor Lock

    SiBE05-513A Troubleshooting 4.10 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. The system judges the compressor lock, and cannot operation with position detection within Decision 15 seconds after start up.

  • Page 101: Dc Fan Lock

    Troubleshooting SiBE05-513A 4.11 DC Fan Lock Remote Controller Display Method of A fan motor or related error is detected by checking the high-voltage fan motor rpm being Malfunction detected by the Hall IC. Detection Malfunction The fan does not start in 30 seconds even when the fan motor is running. The system will be shut down if the error occurs 16 times.

  • Page 102: Input Over Current Detection

    SiBE05-513A Troubleshooting 4.12 Input Over Current Detection Remote Controller Display Method of An input over-current is detected by checking the input current value with the compressor Malfunction running. Detection Malfunction The following current with the compressor running continues for 2.5 seconds. Cooling / Heating: Above 12A Decision Conditions...

  • Page 103: Four Way Valve Abnormality

    Troubleshooting SiBE05-513A 4.13 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 104 SiBE05-513A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.05 Refer to P.114 Four way valve coil Correct. disconnected (loose)? Check No.06 Refer to P.115 Reconnect. Harness out of connector? Check No.11 Refer to P.117...

  • Page 105: Discharge Pipe Temperature Control

    Troubleshooting SiBE05-513A 4.14 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 4 times successively due to abnormal discharge pipe temperature, the system will be shut down.

  • Page 106: High Pressure Control In Cooling

    SiBE05-513A Troubleshooting 4.15 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 65°C.
  • Page 107 Troubleshooting SiBE05-513A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.113 Check the installation space. Check No.06 Check No.07 Abnormal Installation condition Change the air outlet grille Refer to P.115 check position.

  • Page 108: Compressor System Sensor Abnormality

    SiBE05-513A Troubleshooting 4.16 Compressor System Sensor Abnormality Remote Controller Display Method of The system checks the DC current before the compressor starts. Malfunction Detection Malfunction If the DC current before compressor start-up is out of the range 0.5-4.5 V (sensor output converted to voltage value) or if the DC voltage before compressor start-up is below 50 V.

  • Page 109: Position Sensor Abnormality

    Troubleshooting SiBE05-513A 4.17 Position Sensor Abnormality Remote Controller Display Method of A compressor startup failure is detected by checking the compressor running condition through Malfunction the position detection circuit. Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal is sent.

  • Page 110: Dc Voltage / Current Sensor Abnormality

    SiBE05-513A Troubleshooting 4.18 DC Voltage / Current Sensor Abnormality Remote Controller Display Method of Detecting abnormality of the DC sensor by the running frequency of compressor and by the Malfunction input current multiplied DC voltage and current. Detection Malfunction The compressor running frequency is below 52 Hz. (The input current is also below 0.5 A.) Decision If this error repeats 4 times, the system will be shut down.

  • Page 111: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting SiBE05-513A 4.19 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 112 SiBE05-513A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Refer to P.115 Turn on the power again. Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.

  • Page 113: Electrical Box Temperature Rise

    Troubleshooting SiBE05-513A 4.20 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 80°C. Reset is made when the temperature drops below 70°C.
  • Page 114 SiBE05-513A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 WARNING Turn off the power and turn it on Refer to P.115 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 80˚C and stops itself when it...

  • Page 115: Radiation Fin Temperature Rise

    Troubleshooting SiBE05-513A 4.21 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 90°C. If a radiation fin temperature rise takes place 4 times successively, the system will be shut Decision down.
  • Page 116 SiBE05-513A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Turn off the power and turn it on Refer to P.115 again to get the system started. Check No.07 Refer to P.116 Error displayed again?

  • Page 117: Output Over Current Detection

    Troubleshooting SiBE05-513A 4.22 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. A speed error occurs while the compressor is running.
  • Page 118 SiBE05-513A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.116 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.

  • Page 119: Insufficient Gas

    Troubleshooting SiBE05-513A 4.23 Insufficient Gas Remote Controller Display Method of Gas shortage detection I: Malfunction Gas shortage is detected by checking the input current value and the compressor running frequency. If the gas is short, the input current is smaller than the normal value. Detection Gas shortage detection II: Gas shortage is detected by checking the discharge temperature and the opening of the...
  • Page 120 SiBE05-513A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.113 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.06 * Room temperature thermistor * Outdoor air thermistor...

  • Page 121: Over-Voltage Detection

    Troubleshooting SiBE05-513A 4.24 Over-voltage Detection Remote Controller Display Method of An abnormal voltage rise is detected by checking the specified over-voltage detection circuit. Malfunction Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer (The voltage is over 400V). Decision The system will be shut down if the error occurs 255 times.

  • Page 122: Check

    SiBE05-513A Check 5. Check How to Check 5.1.1 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 inserted in the PCB. Compare the EV unit and the connector number.

  • Page 123: Four Way Valve Performance Check

    Check SiBE05-513A 5.1.2 Four Way Valve Performance Check Check No.05 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 124 SiBE05-513A Check 5.1.3 Thermistor Resistance Check Check No.06 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.

  • Page 125: Installation Condition Check

    Check SiBE05-513A 5.1.4 Installation Condition Check Check No.07 Installation condition check Check the allowable Abnormal Change the position of the air dimensions of the air suction discharge grille or the and discharge area. installation location. Normal Does the discharged air from other outdoor Change the position of the air unit cause an increase of discharge grille or the...

  • Page 126: Outdoor Unit Fan System Check

    SiBE05-513A Check 5.1.6 Outdoor Unit Fan System Check Check No.09 DC motor Check the outdoor unit fan system. Fan motor lead wire Outdoor unit fan running? Reconnect. connector disconnected? Outdoor unit fan system Go to Check No. 15. functioning. (R2857) 5.1.7 Power Supply Waveforms Check Check No.10...

  • Page 127: Power Transistor Check

    Check SiBE05-513A 5.1.9 Power Transistor Check Check No.13 Note: Check to make sure that the voltage between the terminal of Power transistor (+) and (-) is approx. 0 volt before checking power transistor. < Measuring method > Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.

  • Page 128: Hall Ic Check

    SiBE05-513A Check 5.1.11 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. Failure of (1) faulty PCB Replace the PCB.
  • Page 129 Check SiBE05-513A Service Diagnosis...

  • Page 130: Part 7 Removal Procedure

    SiBE05-513A Part 7 Removal Procedure 1. Indoor Unit...................122 1.1 Removal of the Air Filter / Front Grille ..........122 1.2 Removal of the Front Panel..............125 1.3 Removal of the Horizontal Blade............127 1.4 Removal of the Signal Receiver Unit / Swing Motor......128 1.5 Removal of the Discharge Grille............129 1.6 Removal of the Drain Pan ..............130 1.7 Removal of the Electrical Box / PCB ............131...

  • Page 131: Indoor Unit

    Indoor Unit SiBE05-513A 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 132 SiBE05-513A Indoor Unit Step Procedure Points Holding the tab at the center of filter frame, pull the air filter forward. Remove the air filter by Installing filters can be done pulling along the slide easily by sliding-in along the guide. slide guide.
  • Page 133 Indoor Unit SiBE05-513A Step Procedure Points To remove the front grille, disengage hooks at three locations. 4. Remove the 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 134: Removal Of The Front Panel

    SiBE05-513A 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.
  • Page 135 Indoor Unit SiBE05-513A Step Procedure Points Disengage the three hooks of the front panel located at discharge port. 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 136: Removal Of The Horizontal Blade

    SiBE05-513A 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. Deflect the three center bearings to left side slightly, and disengage shaft of blade.

  • Page 137: Removal Of The Signal Receiver Unit / Swing Motor

    Indoor Unit SiBE05-513A 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 138: Removal Of The Discharge Grille

    SiBE05-513A 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. Disengage the two hooks (left and right sides) and remove the discharge grille by...

  • Page 139: Removal Of The Drain Pan

    Indoor Unit SiBE05-513A 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 hose. Caution Be careful not to wet the floor with drain water.

  • Page 140: Removal Of The Electrical Box / Pcb

    SiBE05-513A 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...
  • Page 141 Indoor Unit SiBE05-513A Step Procedure Points The illustration shows control PCB (indoor unit). (R2958) Disconnect the terminals from the terminal strip board. Removal Procedure...
  • Page 142 SiBE05-513A Indoor Unit Step Procedure Points The illustration shows 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 box.

  • Page 143: Removal Of The Fan Rotor / Fan Motor

    Indoor Unit SiBE05-513A 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 rotor covers. (Securing hooks are located at A and B-section.) The right illustration shows the opposite...
  • Page 144 SiBE05-513A Indoor Unit Step Procedure Points Remove the two screws to remove fan motor fixtures. Remove the bearing fixture. Loosen the shaft supporting section using a hexagonal wrench (for M6) to remove the fan motor. Removal Procedure...

  • Page 145: Removal Of The Heat Exchanger

    Indoor Unit SiBE05-513A 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 down operation before disassembling refrigerant pipe.
  • Page 146 SiBE05-513A Indoor Unit Step Procedure Points Hooking piece is Warning located on the piping side of the heat Do not contaminate any gas (including air) other than the exchanger. specified refrigerant (R-410A) into refrigerating cycle. (Contaminating of air or other gas causes abnormal temperature rise in refrigerating cycle, and this...

  • Page 147: Outdoor Unit

    Outdoor Unit SiBE05-513A 2. Outdoor Unit Removal of Panels 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 1. Features Take care not to cut your finger by the fins of the heat exchanger.
  • Page 148 SiBE05-513A Outdoor Unit Step Procedure Points 2. Remove the panels. Loosen the 3 screws (front, right, left) and lift panel. Remove the drip proof plate. Disconnect the The fan motor is united with connector for fan motor the front panel. (S70).
  • Page 149 Outdoor Unit SiBE05-513A Step Procedure Points Undo the hooks. The front panel has 4 hooks. Pull and remove the The fan motor is united with front panel. the front panel. 3. Remove the fan motor. The screw has reverse winding. Unscrew the washer- fitted nut (M10) of the propeller fan with a...
  • Page 150 SiBE05-513A Outdoor Unit Step Procedure Points Loosen the 2 screws and lift the bell mouth to undo the hooks. Remove the bell mouth. Loosen the fixing hooks Put the lead wire through the and release the lead back of the motor when wire.
  • Page 151 Outdoor Unit SiBE05-513A Step Procedure Points Loosen the 4 screws to M4×16 remove the motor. DC fan motor Loosen the 2 screws to remove the fan motor fixing frame. Removal Procedure...
  • Page 152 SiBE05-513A Outdoor Unit Step Procedure Points 4. Remove the right side panel. Loosen the 2 screws on the rear side. Loosen the 3 screws on the right side. Loosen the screw and lift the connection port to remove. Removal Procedure...
  • Page 153 Outdoor Unit SiBE05-513A Step Procedure Points When reassembling, make sure to fit the hook. Removal Procedure...

  • Page 154: Removal Of Electrical Box

    SiBE05-513A Outdoor Unit Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the top panel. Disconnect the connector for fan motor. 1. Remove the electrical box.
  • Page 155 Outdoor Unit SiBE05-513A Step Procedure Points Release the discharge Pay attention so as not to pipe thermistor. lose the clip for thermistor. Release the heat Pay attention so as not to exchanger thermistor. lose the clip. Lift and remove the electrical box.

  • Page 156: Removal Of Reactor And Partition Plate

    SiBE05-513A Outdoor Unit Removal of Reactor Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. Remove the electrical box. 1. Remove the reactor. Loosen the screw.
  • Page 157 Outdoor Unit SiBE05-513A 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. Removal Procedure...

  • Page 158: Removal Of Sound Blanket

    SiBE05-513A Outdoor Unit Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. Remove the electrical box. 1. Remove the sound blanket.
  • Page 159 Outdoor Unit SiBE05-513A Step Procedure Points Pull the sound blanket Since the piping ports on the (inner) out. sound blanket are torn easily, remove the blanket carefully. Pull the sound blanket (bottom) out. Removal Procedure...

  • Page 160: Removal Of Four Way Valve

    SiBE05-513A Outdoor Unit Removal of Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the peripheries. Remove the four way valve and the sheets of putty so as not to burn them.
  • Page 161 Outdoor Unit SiBE05-513A Step Procedure Points Remove the sheets of putty. Cut the pipe with a tube cutter. Heat up the brazed part Provide a protective sheet or and withdraw the piping a steel plate so that the with pliers. brazing flame cannot influence peripheries.

  • Page 162: Removal Of Compressor

    SiBE05-513A Outdoor Unit Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the compressor. Unscrew the nut of the compressor. Warning Ventilate when refrigerant leaks during the work.
  • Page 163 Outdoor Unit SiBE05-513A Step Procedure Points Heat up the brazed part of the suction side and disconnect. Lift the compressor up and remove it. Removal Procedure...

  • Page 164: Removal Of Pcb

    SiBE05-513A Outdoor Unit Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the PCB. You can remove the PCB when you disconnect the Feature of the PCB read wires on the terminal board without removing the...
  • Page 165 Outdoor Unit SiBE05-513A Step Procedure Points Loosen the 4 screws. Undo the 3 hooks on the upper side. Lift and pull out the PCB. Removal Procedure...
  • Page 166 SiBE05-513A Outdoor Unit Step Procedure Points Feature of the PCB See page 15 for detail. S70: fan motor S80: four way valve S90: thermistor (outdoor air, heat exchanger, discharge pipe) Removal Procedure...
  • Page 167 Outdoor Unit SiBE05-513A Removal Procedure...

  • Page 168: Part 8 Others

    SiBE05-513A Part 8 Others 1. Others ....................160 1.1 Test Run from the Remote Controller ..........160 1.2 Jumper Settings ...................161 Others...

  • Page 169: Others

    Others SiBE05-513A 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 170: Jumper Settings

    SiBE05-513A 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) Open the air inlet grille and the screw cover, and remove the 7 screws.
  • Page 171 Others SiBE05-513A Others...

  • Page 172: Part 9 Appendix

    SiBE05-513A Part 9 Appendix 1. Piping Diagrams..................164 1.1 Indoor Units ..................164 1.2 Outdoor Units ..................165 2. Wiring Diagrams..................167 2.1 Indoor Units ..................167 2.2 Outdoor Units ..................167 Appendix...

  • Page 173: Piping Diagrams

    Piping Diagrams SiBE05-513A 1. Piping Diagrams Indoor Units FLKS25BVMB, FLKS35BVMB, FLKS25BAVMB, FLXS25BVMB, FLXS35BVMB, FLXS25BAVMB, FLKS35BAVMB FLXS35BAVMB INDOOR UNIT INDOOR UNIT ( 6. 4CuT ) ( 6. 4CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR FIELD PIPING ON HEAT THERMISTOR ( 6. 4CuT ) EXCH.

  • Page 174: Outdoor Units

    SiBE05-513A Piping Diagrams Outdoor Units 1.2.1 Cooling Only RKS25DVMB, RKS25D2VMB, RKS25D3VMB OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER 7.0CuT THERMISTOR 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 7.0CuT 6.4CuT 6.4CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY FIELD PIPING...
  • Page 175 Piping Diagrams SiBE05-513A 1.2.2 Heat Pump RXS25DVMB, RXS25D2VMB, RXS25D3VMB OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER 7.0CuT THERMISTOR 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 7.0CuT 6.4CuT 6.4CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY VALVE FIELD PIPING ON : HEATING...

  • Page 176: Wiring Diagrams

    SiBE05-513A Wiring Diagrams 2. Wiring Diagrams Indoor Units FLKS25/35BVMB, FLXS25/35BVMB, FLKS25/35BAVMB, FLXS25/35BAVMB 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 177 Wiring Diagrams SiBE05-513A Appendix...

  • Page 178: Index

    SiBE05-513A Index Numerics compressor lock ............ 91 compressor overload ..........90 00 ................81 compressor protection function ......35 3-minute standby ..........28, 35 compressor system sensor abnormality ....99 connectors ............12, 14 control PCB (indoor unit) ....... 13, 132 A1 ................82 control PCB (outdoor unit) ........
  • Page 179 SiBE05-513A J3 ..............102 HL3 ................ 14 J6 ..............102 HN3 ............... 14 L3 ..............104 HOME LEAVE operation ......... 26, 63 L4 ..............106 horizontal blade ........... 127 L5 ..............108 hot start function ............ 28 P4 ..............102 U0 ..............110 U2 ..............112 indoor heat exchanger thermistor ....29, 30 U4 ..............87 indoor unit PCB abnormality .........
  • Page 180 SiBE05-513A overload protector ..........14 safety precautions ..........49 over-voltage detection ..........112 self-diagnosis digital display ........28 sensor malfunction detection ........ 43 service check function ........... 78 P4 .................102 shelter ..............138 partition plate ............147 side panel cover ..........124 PCB ..............155 signal receiver PCB ..........
  • Page 181 SiBE05-513A Index...

  • Page 182: Drawings & Flow Charts

    ......... 112 display PCB ............13 piping diagrams electrical box temperature rise ......104 FLKS25BAVMB ..........164 electronic expansion valve check ......113 FLKS25BVMB ..........164 electronic expansion valve control ......40 FLKS35BAVMB ..........164 FLKS35BVMB ..........164 FLXS25BAVMB ..........164 facility setting jumper ..........45 FLXS25BVMB ..........
  • Page 183 SiBE05-513A service check function ..........78 signal receiver PCB ..........13 signal transmission error (between indoor and outdoor units) ....87 target discharge pipe temperature control .....42 thermistor or related abnormality (indoor unit) ..86 thermistor or related abnormality (outdoor unit) ...102 thermistor resistance check .........115 thermostat control ..........24 trial operation from remote controller ....160 turning speed pulse input on the outdoor unit PCB...
  • Page 184 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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