Daikin FTKS25BVMB Service Manual
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Daikin FTKS25BVMB Service Manual

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Service
Manual
Inverter Pair
Wall Mounted Type
B Series
[Applied Models]
Inverter Pair : Cooling Only
Inverter Pair : Heat Pump
SiBE04-302

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Summary of Contents for Daikin FTKS25BVMB

  • Page 1 SiBE04-302 Service Manual Inverter Pair Wall Mounted Type B Series [Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump...
  • Page 2 Wall Mounted Type Wall Mounted Type Wall Mounted Type B Series B Series B Series B Series Cooling Only Indoor Unit FTKS25BVMB ATKS25BVMB FTK25BVMB ATK25BVMB FTS20BVMB FTKS35BVMB ATKS35BVMB FTK35BVMB ATK35BVMB FTS25BVMB FTS35BVMB Outdoor Unit RKS25BVMB ARKS25BVMB RK25BVMB ARK25BVMB RS20BVMB RKS35BVMB ARKS35BVMB RK35BVMB...

  • Page 3: Table Of Contents

    SiBE04-302 1. Introduction .....................v 1.1 Safety Cautions ..................v Part 1 List of Function ..............1 1. Functions....................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................5 Part 2 Specifications ..............9 1. Specifications ..................10 1.1 Cooling Only...................10 1.2 Heat Pump .....................16 Part 3 Printed Circuit Board Connector Wiring Diagram ... 23 1.
  • Page 4 SiBE04-302 3.15 Additional Function.................58 Part 5 System Configuration............59 1. System Configuration................60 2. Instruction (In case of FTK(X)S 25/35 BVMB) ........61 2.1 Safety Precautions .................61 2.2 Names of Parts..................63 2.3 Preparation before Operation..............66 2.4 AUTO·DRY·COOL·HEAT·FAN Operation ..........69 2.5 Adjusting the Air Flow Direction .............71 2.6 POWERFUL Operation ................73 2.7 OUTDOOR UNIT SILENT Operation .............74 2.8 HOME LEAVE Operation ...............75...
  • Page 5 SiBE04-302 1.2 Removal of Front Grille ................133 1.3 Removal of Horizontal Blade and Vertical Blade........136 1.4 Removal of Switch Box, PC Board and Swing Motor......138 1.5 Removal of Heat Exchanger ..............144 1.6 Install of Drain Plug ................147 1.7 Removal of Fan Rotor and Fan Motor..........148 2.

  • Page 6: Introduction

    SiBE04-302 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 SiBE04-302 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

    SiBE04-302 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 SiBE04-302 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. Improper installation and connections can cause excessive heat generation, fire or an electrical shock. If the installation platform or frame has corroded, replace it.

  • Page 10: Part 1 List Of Function

    SiBE04-302 Part 1 List of Function 1. Functions....................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................5 List of Function...

  • Page 11: Functions

    Functions SiBE04-302 Functions Cooling Only Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, –10 –10 Virustatic Functions Operation Limit for Cooling (°C) Basic Function Operation Limit for Heating (°C) — — Photocatalytic Deodorizing Filter Air Purifying Filter with Photocatalytic PAM Control —...
  • Page 12 SiBE04-302 Functions Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, Virustatic Functions Operation Limit for Cooling (°C) Basic Function Operation Limit for Heating (°C) — — Photocatalytic Deodorizing Filter — — Air Purifying Filter with Photocatalytic PAM Control —...
  • Page 13 Functions SiBE04-302 Category Functions Category Functions Inverter (with Inverter Power Control) — Air Purifying Filter with Bacteriostatic, Virustatic Functions Operation Limit for Cooling (°C) 10~46 Basic Operation Limit for Heating (°C) — Photocatalytic Deodorizing Filter — Function Air Purifying Filter with Photocatalytic PAM Control —...

  • Page 14: Heat Pump

    SiBE04-302 Functions Heat Pump Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, –10 –10 Virustatic Functions Operation Limit for Cooling (°C) Basic –15 –15 Function Operation Limit for Heating (°C) Photocatalytic Deodorizing Filter ~15.5 ~15.5 Air Purifying Filter with Photocatalytic PAM Control...
  • Page 15 Functions SiBE04-302 Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, Virustatic Functions Operation Limit for Cooling (°C) Basic –10 –10 Function Operation Limit for Heating (°C) Photocatalytic Deodorizing Filter — — ~15.5 ~15.5 Air Purifying Filter with Photocatalytic PAM Control —...
  • Page 16 SiBE04-302 Functions Category Functions Category Functions Inverter (with Inverter Power Control) — Air Purifying Filter with Bacteriostatic, Virustatic Functions Operation Limit for Cooling (°C) 10~46 Basic Operation Limit for Heating (°C) –10~15.5 Photocatalytic Deodorizing Filter — Function Air Purifying Filter with Photocatalytic PAM Control —...
  • Page 17 Functions SiBE04-302 List of Function...

  • Page 18: Part 2 Specifications

    SiBE04-302 Part 2 Part 2 Part 2 Part 2 Specifications Specifications Specifications Specifications 1. Specifications ..................10 1.1 Cooling Only .................10 1.2 Heat Pump..................16 Specifications...

  • Page 19: Specifications

    Specifications SiBE04-302 1. Specifications Cooling Only 230V, 50Hz Indoor Units FTKS25BVMB FTKS35BVMB Models 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 (860~3,180) Moisture Removal Running Current (Rated) Power Consumption...
  • Page 20 SiBE04-302 Specifications 230V, 50Hz Indoor Units ATKS25BVMB ATKS35BVMB Models Outdoor Units ARKS25BVMB ARKS35BVMB 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 (860~3,180) Moisture Removal Running Current (Rated) Power Consumption 700 (240~925) 1,160 (240~1,300) Rated (Min.~Max.) Power Factor 82.3...
  • Page 21 Specifications SiBE04-302 230V, 50Hz Indoor Units FTK25BVMB FTK35BVMB Models Outdoor Units RK25BVMB RK35BVMB 2.5 (1.3~3.0) 3.15 (1.4~3.8) Capacity Btu/h 8,550 (4,450~10,250) 10,750 (4,800~13,000) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,710 (1,200~3,270) Moisture Removal Running Current (Rated) Power Consumption 890 (430~1,250) 1,120 (500~1,720) Rated (Min.~Max.) Power Factor 86.0...
  • Page 22 SiBE04-302 Specifications 230V, 50Hz Indoor Units ATK25BVMB ATK35BVMB Models Outdoor Units ARK25BVMB ARK35BVMB 2.5 (1.3~3.0) 3.15 (1.4~3.8) Capacity Btu/h 8,550 (4,450~10,250) 10,750 (4,800~13,000) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,710 (1,200~3,270) Moisture Removal Running Current (Rated) Power Consumption 890 (430~1,250) 1,120 (500~1,720) Rated (Min.~Max.) Power Factor 86.0...
  • Page 23 Specifications SiBE04-302 230V, 50Hz Indoor Units FTS20BVMB FTS25BVMB Models Outdoor Units RS20BVMB RS25BVMB Capacity Btu/h 6,850 8,550 kcal/h 1,720 2,150 Moisture Removal Running Current (Rated) Power Consumption (Rated) Power Factor 88.2 86.0 COP (Rated) 2.90 2.81 φ φ Liquid Piping φ...
  • Page 24 SiBE04-302 Specifications 230V, 50Hz Indoor Units FTS35BVMB Models Outdoor Units RS35BVMB 3.15 Capacity Btu/h 10,750 kcal/h 2,710 Moisture Removal Running Current (Rated) Power Consumption (Rated) 1,120 Power Factor 81.2 COP (Rated) 2.81 φ Liquid Piping φ Connections φ Drain 18.0 Heat Insulation Both Liquid and Gas Pipes Indoor Unit...

  • Page 25: Heat Pump

    Specifications SiBE04-302 Heat Pump 230V, 50Hz Indoor Units FTXS25BVMB FTXS35BVMB 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) 4.2 (1.0~5.8) Capacity Btu/h 8,550 (3,400~10,250) 11,600 (3,400~17,050) 11,950 (3,400~12,600) 14,350 (3,400~19,800) Rated (Min.~Max.) kcal/h 2,150 (860~2,580) 2,920 (860~4,300) 3,010 (860~3,180)
  • Page 26 SiBE04-302 Specifications 230V, 50Hz Indoor Units ATXS25BVMB ATXS35BVMB Models ARXS25BVMB ARXS35BVMB Outdoor Units Cooling Heating Cooling Heating 2.5 (1.0~3.0) 3.4 (1.0~5.0) 3.5 (1.0~3.7) 4.2 (1.0~5.8) Capacity Btu/h 8,550 (3,400~10,250) 11,600 (3,400~17,050) 11,950 (3,400~12,600) 14,350 (3,400~19,800) Rated (Min.~Max.) kcal/h 2,150 (860~2,580) 2,920 (860~4,300) 3,010 (860~3,180) 3,610 (860~4,988)
  • Page 27 Specifications SiBE04-302 230V, 50Hz Indoor Units FTX25BVMB FTX35BVMB Models RX25BVMB RX35BVMB Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.3 (1.3~4.0) 3.15 (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) 10,750 (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) 2,710 (1,200~3,270) 3,530 (1,200~4,300)
  • Page 28 SiBE04-302 Specifications 230V, 50Hz Indoor Units ATX25BVMB ATX35BVMB Models ARX25BVMB ARX35BVMB Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.3 (1.3~4.0) 3.15 (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) 10,750 (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) 2,710 (1,200~3,270) 3,530 (1,200~4,300)
  • Page 29 Specifications SiBE04-302 230V, 50Hz Indoor Units FTYS20BVMB FTYS25BVMB Models RYS20BVMB RYS20BVMB Outdoor Units Cooling Heating Cooling Heating Capacity Btu/h 6,850 8,900 8,550 11,300 Rated (Min.~Max.) kcal/h 1,720 2,240 2,150 2,840 Moisture Removal — — Running Current (Rated) Power Consumption 1,025 Rated (Min.~Max.) Power Factor 88.2...
  • Page 30 SiBE04-302 Specifications 230V, 50Hz Indoor Units FTYS35BVMB Models RYS35BVMB Outdoor Units Cooling Heating 3.15 Capacity Btu/h 10,750 14,000 Rated (Min.~Max.) kcal/h 2,710 3,530 Moisture Removal — Running Current (Rated) Power Consumption 1,120 1,345 Rated (Min.~Max.) Power Factor 81.2 84.8 COP (Rated) 2.81 3.05 φ...
  • Page 31 Specifications SiBE04-302 Specifications...

  • Page 32: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE04-302 Part 3 Part 3 Part 3 Part 3 Printed Circuit Board Printed Circuit Board Printed Circuit Board Printed Circuit Board Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........24 1.1 Indoor Unit....................24 1.2 Outdoor Unit ...................27 Printed Circuit Board Connector Wiring Diagram...

  • Page 33: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram SiBE04-302 Printed Circuit Board Connector Wiring Diagram Indoor Unit Printed circuit board (1) (Control PCB) Printed circuit board (2) (Signal Receiver PCB) Printed circuit board (3) (Intelligent Eye Sensor PCB) Name of Connector Connector for fan motor Connector for swing motor (Horizontal Flap) Connector for fan motor Connector for centralized control to 5 rooms...
  • Page 34 SiBE04-302 Printed Circuit Board Connector Wiring Diagram Outline of PCB Control PCB (1) Signal receiver PCB (2) GRN YLW RED LED1 LED2 LED3 12V check Jumper (JP12) Ground (JP11) Intelligent eye 5V check Jumper sensor PCB (3) (JP21) JA JB (R2507) Printed Circuit Board Connector Wiring Diagram...
  • Page 35 Printed Circuit Board Connector Wiring Diagram SiBE04-302 Detail of PCB PCB(1) PCB(2) PCB(3) 2P084366H Printed Circuit Board Connector Wiring Diagram...

  • Page 36: Outdoor Unit

    SiBE04-302 Printed Circuit Board Connector Wiring Diagram Outdoor Unit Printed circuit board (1) Printed circuit board (2) Name of Connector Connector for PCB (2) Connector for PCB (1) Connector for compressor motor Connector for fan motor Connector for four way valve coil (Heat pump only) Connector for thermistor Outline of PCB PCB(1)
  • Page 37 Printed Circuit Board Connector Wiring Diagram SiBE04-302 Detail of PCB (1) Connect to S11 on PCB (2) 3P100242-1B Detail of PCB (2) Printed Circuit Board Connector Wiring Diagram...

  • Page 38: Part 4 Function And Control

    SiBE04-302 Part 4 Part 4 Part 4 Part 4 Function and Control Function and Control Function and Control Function and Control 1. Main Functions..................30 1.1 Frequency Principle................30 1.2 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ..32 1.3 Fan Speed Control for Indoor Units............33 1.4 Programme Dry Function ...............34 1.5 Automatic Operation................35 1.6 Night Set Mode..................36...

  • Page 39: Main Functions

    Main Functions SiBE04-302 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 40 SiBE04-302 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 41: Power-Airflow Dual Flaps, Wide Angle Louvers And Auto-Swing

    Main Functions SiBE04-302 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing Power-Airflow The large flaps send a large volume of air downwards to the floor. The flap provides an optimum control area in cooling, heating and dry mode. Dual Flaps Heating Mode During heating mode, the large flap enables direct warm air straight downwards.

  • Page 42: Fan Speed Control For Indoor Units

    SiBE04-302 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 95.

  • Page 43: Programme Dry Function

    Main Functions SiBE04-302 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 44: Automatic Operation

    SiBE04-302 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 45: Night Set Mode

    Main Functions SiBE04-302 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 46: Intelligent Eye

    SiBE04-302 Main Functions Intelligent Eye This is the function that detects existence of humans in the room by a human motion sensor (Intelligent Eye) and reduces the capacity when there is no human in the room in order to save electricity.
  • Page 47 Main Functions SiBE04-302 Since the set temperature is shifted by 2°C higher for 40 minutes, compressor speed becomes low and can realize energy saving operation. But as thermostat is prone to be off by the fact that the set temperature has been shifted, the thermostat-off action is prohibited in 40 minutes so as to prevent this phenomena.

  • Page 48: Home Leave Operation

    SiBE04-302 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 49: Inverter Powerful Operation

    Main Functions SiBE04-302 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 50: 1.10 Other Functions

    SiBE04-302 Main Functions 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 51: Function Of Main Structural Parts

    Function of Main Structural Parts SiBE04-302 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 52: Function Of Thermistor

    SiBE04-302 Function of Main Structural Parts Function of Thermistor 2.2.1 Heat Pump Model Four way valve Compressor (R2827) 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 53: Cooling Only Model

    Function of Main Structural Parts SiBE04-302 2.2.2 Cooling Only Model Compressor (R2828) 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 54: Control Specification

    SiBE04-302 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 55: Frequency Control

    Control Specification SiBE04-302 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 56 SiBE04-302 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 ( ∆...

  • Page 57: Controls At Mode Changing / Start-Up

    Control Specification SiBE04-302 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 58: Discharge Pipe Control

    SiBE04-302 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 (R2836)

  • Page 59: Freeze-Up Protection Control

    Control Specification SiBE04-302 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 60: Fan Control

    SiBE04-302 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 61: Moisture Protection Function 2

    Control Specification SiBE04-302 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 62: Defrost Control

    SiBE04-302 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 63: Electronic Expansion Valve Control

    Control Specification SiBE04-302 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 64 SiBE04-302 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 65 Control Specification SiBE04-302 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...

  • Page 66: 3.13 Malfunctions

    SiBE04-302 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 67: Forced Operation Mode

    Control Specification SiBE04-302 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 68: Part 5 System Configuration

    SiBE04-302 Part 5 System Configuration 1. System Configuration................60 2. Instruction (In case of FTK(X)S 25/35 BVMB) ........61 2.1 Safety Precautions .................61 2.2 Names of Parts..................63 2.3 Preparation before Operation..............66 2.4 AUTO·DRY·COOL·HEAT·FAN Operation ..........69 2.5 Adjusting the Air Flow Direction .............71 2.6 POWERFUL Operation ................73 2.7 OUTDOOR UNIT SILENT Operation .............74 2.8 HOME LEAVE Operation ...............75...

  • Page 69: System Configuration

    System Configuration SiBE04-302 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 70: Instruction (In Case Of Ftk(X)S 25/35 Bvmb)

    • 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 71: Installation Site

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 • 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 72: Names Of Parts

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 Names of Parts Names of parts I Indoor Unit System Configuration...

  • Page 73: I Outdoor Unit

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 I Outdoor Unit I I I I Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: (page 10.) • Push this switch once to start operation. 2. Photocatalytic deodorizing filter and Push once again to stop it.

  • Page 74: Remote Controller

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 I Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT SENSOR CANCEL TIMER < > ARC433A1, A2 1. Signal transmitter: • It selects the operation mode. • It sends signals to the indoor unit. (AUTO/DRY/COOL/HEAT/FAN) (page 10.) 2.

  • Page 75: Preparation Before Operation

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 Preparation before Operation Preparation Before Operation I 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.
  • Page 76 Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 Preparation Before Operation I 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 77 Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 I 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 “ ”...

  • Page 78: Auto·dry·cool·heat·fan Operation

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 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 79 Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 I 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 “ ”...

  • Page 80: Adjusting The Air Flow Direction

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 Adjusting the Air Flow Direction Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. I To adjust the horizontal blades (flaps) 1. Press “SWING button”. The display will light up and the flaps will begin to swing.
  • Page 81 Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 I To adjust the vertical blades (louvers) Hold the knob and move the louvers. (You will find a knob on the left-side and the right-side blades.) Notes on flaps and louvers angles •...

  • Page 82: Powerful Operation

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity . I To start POWERFUL operation 1. Press “POWERFUL button”. •...

  • Page 83: Outdoor Unit Silent Operation

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 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.

  • Page 84: Home Leave Operation

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 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. I To start HOME LEAVE operation 1. Press “HOME LEAVE button” . •...
  • Page 85 Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 I 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 favor- ite set temperature and air flow rate.

  • Page 86: Intelligent Eye Operation

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 INTELLIGENT EYE Operation INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. I To start INTELLIGENT EYE operation 1. Press “SENSOR button”. I To cancel the HOME LEAVE ON/OFF INTELLIGENT EYE TEMP...
  • Page 87 Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 I To adjust the angle of the INTELLIGENT EYE sensor • You can adjust the angle of the INTELLIGENT EYE sensor to increase the detection area. (Adjustable angle: 15° to right and left of centre) INTELLIGENT EYE 15˚...

  • Page 88: Timer Operation

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 2.10 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. I To use OFF TIMER opera- tion •...
  • Page 89 Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 I 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.

  • Page 90: Care And Cleaning

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 2.11 Care and Cleaning Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units I Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. I Front grille 1.

  • Page 91: I Air Filter

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 Filters 1. Open the front grille. (page 24) 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3.

  • Page 92: Before A Long Idle Period

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 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.

  • Page 93: Trouble Shooting

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 2.12 Trouble Shooting 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. •...

  • Page 94: Check Again

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 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 95: Disposal Requirements

    Instruction (In case of FTK(X)S 25/35 BVMB) SiBE04-302 Call the service shop immediately. WARNING I I I I 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.

  • Page 96: Part 6 Service Diagnosis

    SiBE04-302 Part 6 Part 6 Part 6 Part 6 Service Diagnosis Service Diagnosis Service Diagnosis Service Diagnosis 1. Caution for Diagnosis................88 2. Problem Symptoms and Measures ............89 3. Service Check Function ................90 4. Troubleshooting ..................91 4.1 Error Codes and Description ..............91 4.2 Indoor Unit PCB Abnormality ..............92 4.3 Freeze-up Protection Control or High Pressure Control......93 4.4 Fan Motor (AC Motor) or Related Abnormality........95...

  • Page 97: Caution For Diagnosis

    Caution for Diagnosis SiBE04-302 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 98: Problem Symptoms And Measures

    SiBE04-302 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 99: Service Check Function

    Service Check Function SiBE04-302 Service Check Function 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 “00” indication flashes on the temperature display section.

  • Page 100: Troubleshooting

    SiBE04-302 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 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 101: Indoor Unit Pcb Abnormality

    Troubleshooting SiBE04-302 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 102: Freeze-Up Protection Control Or High Pressure Control

    SiBE04-302 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 103 Troubleshooting SiBE04-302 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.122 Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 104: Fan Motor (Ac Motor) Or Related Abnormality

    SiBE04-302 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 105: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting SiBE04-302 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 106: Signal Transmission Error (Between Indoor And Outdoor Units)

    SiBE04-302 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 the data is abnormal.

  • Page 107: Ol Activation (Compressor Overload)

    Troubleshooting SiBE04-302 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 108: Compressor Lock

    SiBE04-302 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. The system judges the compressor lock, and cannot operation with position detection within Decision 15 seconds after start up.

  • Page 109: Input Over Current Detection

    Troubleshooting SiBE04-302 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. Cooling: Above 11A, Heating: Above 13A Decision Conditions...

  • Page 110: Four Way Valve Abnormality

    SiBE04-302 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 111 Troubleshooting SiBE04-302 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.121 Four way valve coil Correct. disconnected (loose)? Check No.6 Refer to P.122 Harness out of connector? Reconnect.

  • Page 112: Discharge Pipe Temperature Control

    SiBE04-302 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 system will be shut down.

  • Page 113: Position Sensor Abnormality

    Troubleshooting SiBE04-302 4.12 Position Sensor Abnormality Remote Controller Display Method of FTK(X)S, ATK(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 is sent.

  • Page 114: Ct Or Related Abnormality

    SiBE04-302 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. (The input current is also below 0.5 A.) Decision If this error repeats 4 times, the system will be shut down.
  • Page 115 Troubleshooting SiBE04-302 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.12 Turn off the power and turn it on Refer to P.126 again. Get the system started. ∗...

  • Page 116: Thermistor Or Related Abnormality (Outdoor Unit)

    SiBE04-302 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 117 Troubleshooting SiBE04-302 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.122 Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.

  • Page 118: Electrical Box Temperature Rise

    SiBE04-302 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 temperature drops below 113°C.) Decision Conditions...
  • Page 119 Troubleshooting SiBE04-302 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 WARNING Turn off the power and turn it on Refer to P.122 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 120˚C and stops itself...

  • Page 120: Radiation Fin Temperature Rise

    SiBE04-302 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, If a radiation fin temperature rise takes place 4 times successively, the system will be shut Decision down.
  • Page 121 Troubleshooting SiBE04-302 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.122 again to get the system started. Check No.7 Refer to P.123 Error displayed again?

  • Page 122: Output Over Current Detection

    SiBE04-302 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. A speed error occurs while the compressor is running.
  • Page 123 Troubleshooting SiBE04-302 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, take the following procedure.

  • Page 124: Insufficient Gas

    SiBE04-302 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 125 Troubleshooting SiBE04-302 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.120 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor Check No.6 * Outdoor air thermistor...

  • Page 126: Over-Voltage Detection

    SiBE04-302 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 (The voltage is over 400V). Decision The system will be shut down if the error occurs 5 times.

  • Page 127: High Pressure Control In Cooling

    Troubleshooting SiBE04-302 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 60°C.
  • Page 128 SiBE04-302 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.120 Check No.7 Abnormal Check No.6 Installation condition Change the air outlet grille Refer to P.122 check position.

  • Page 129: Check

    Check SiBE04-302 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 130: Four Way Valve Performance Check

    SiBE04-302 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 131: Thermistor Resistance Check

    Check SiBE04-302 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 132: Installation Condition Check

    SiBE04-302 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 133: Discharge Pressure Check

    Check SiBE04-302 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 134: Power Supply Waveforms Check

    SiBE04-302 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 135: Capacitor Voltage Check

    Check SiBE04-302 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 136: Hall Ic Check

    SiBE04-302 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 137 Check SiBE04-302 Service Diagnosis...

  • Page 138: Part 7 Removal Procedure

    SiBE04-302 Part 7 Part 7 Part 7 Part 7 Removal Procedure Removal Procedure Removal Procedure Removal Procedure 1. Indoor Unit...................130 1.1 Removal of Air Filter................130 1.2 Removal of Front Grille ................133 1.3 Removal of Horizontal Blade and Vertical Blade........136 1.4 Removal of Switch Box, PC Board and Swing Motor......138 1.5 Removal of Heat Exchanger ..............144 1.6 Install of Drain Plug ................147 1.7 Removal of Fan Rotor and Fan Motor..........148...

  • Page 139: Indoor Unit

    Indoor Unit SiBE04-302 1. Indoor Unit Removal of Air Filter Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.. Step Procedure Points 1. External features If ON/OFF button is kept pushing for 5 seconds, a forced cooling operation will be carried out for approx.
  • Page 140 SiBE04-302 Indoor Unit Step Procedure Points 3. Opening and shutting front panel Hook a finger onto the Support the front panel by one projection part provided hand, while remove the rotation on the both sides of the axis at the upper center by the unit’s panel and open other hand.
  • Page 141 Indoor Unit SiBE04-302 Step Procedure Points When restoring the air filter, make sure that the projection parts on the panel are in the guide groove, and then shut the panel. Removal Procedure...

  • Page 142: Removal Of Front Grille

    SiBE04-302 Indoor Unit Removal of Front Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Opening and closing of service cover Remove a service cover mounting screw. Open service cover upward A switch for field setting is...

  • Page 143: Removal Of Front Grille

    Indoor Unit SiBE04-302 Step Procedure Points 2. Removal of front grille assembly. Remove the two Screw stoppers inside the screws, in the right and flap which were equipped in the left, which fix the the existing models are not main body with the front provided.
  • Page 144 SiBE04-302 Indoor Unit Step Procedure Points The front grille can be When restoring the grille, removed in a manner to Make sure whether each pull out the upper part hook is set as it was. forward and lift up the lower part.

  • Page 145: Removal Of Horizontal Blade And Vertical Blade

    Indoor Unit SiBE04-302 Removal of Horizontal Blade and Vertical Blade Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove horizontal blade. Lift horizontal blade to Screw stoppers inside the open position.
  • Page 146 SiBE04-302 Indoor Unit Step Procedure Points For restoring. 1. Since the key pattern hook is provided on the left side, insert the edge of the blade to the tip while rotating it. 2. Restore the two fixed parts of the horizontal blade onto the hook.

  • Page 147: Removal Of Switch Box, Pc Board And Swing Motor

    Indoor Unit SiBE04-302 Removal of Switch Box, PC Board and Swing Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove front grill. 1. Remove switch box.
  • Page 148 SiBE04-302 Indoor Unit Step Procedure Points Remove a screw on the The switch box can be terminal strip. removed instead of disengaging the terminal strip. Remove a screw on the switch box. Removal Procedure...
  • Page 149 Indoor Unit SiBE04-302 Step Procedure Points Pull up the switch box A hook is provided on the forward to remove. behind. Removal Procedure...
  • Page 150 SiBE04-302 Indoor Unit Step Procedure Points 2. Removal of Remove the shelter. Disengage the front plate of the switch box. Disengage the knobs by pushing the two hooks at the top and the bottom. Sliding to the left, the front part of the switch box can be removed.
  • Page 151 Indoor Unit SiBE04-302 Step Procedure Points Disengage the four knobs on the back of the display PCB. Display PCB. Removal Procedure...
  • Page 152 SiBE04-302 Indoor Unit Step Procedure Points Control PCB. The control integrated with the power supply PCB. Glass tabu fuse 3.15A 250V (HA terminal) S7(Fan motor) S6(Swing motor) (Address) (Heat exchanger thermistor) (R2541) 3. Remove swing motor assembly. To remove swing motor assembly, remove two screws.

  • Page 153: Removal Of Heat Exchanger

    Indoor Unit SiBE04-302 Removal of Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Conduct pump-down Warning! operation. If gas leaks, repair the leak Remove the installation location, then connect all frame from the mounting refrigerant from the unit.
  • Page 154 SiBE04-302 Indoor Unit Step Procedure Points Disengage the hooks of the pipe retainer on the back. Pull auxiliary pipe Be careful to prevent pipe forward to an angle of deformation. 10 to 20 degrees. Disengage hooks located right and left side, and pull heat exchanger forward.
  • Page 155 Indoor Unit SiBE04-302 Step Procedure Points Lift and remove heat exchanger. Caution! When removing or re- installing heat exchanger, be sure to wear protective gloves or wrap heat exchanger with cloths. (Fins can cut fingers.) Removal Procedure...

  • Page 156: Install Of Drain Plug

    SiBE04-302 Indoor Unit Install of Drain Plug Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect drain hose. The drain pan is integrated with the bottom plate. Pull out the drain plug in the left on the drain pan by hand.

  • Page 157: Removal Of Fan Rotor And Fan Motor

    Indoor Unit SiBE04-302 Removal of Fan Rotor Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove heat exchanger. To remove right side panel, remove three screws.
  • Page 158 SiBE04-302 Indoor Unit Step Procedure Points Disengage hook. Loosen the hexagon head set screw on the fan rotor. Removal Procedure...
  • Page 159 Indoor Unit SiBE04-302 Step Procedure Points Remove the motor and fan rotor. Remove a screw on the left side panel. Removal Procedure...
  • Page 160 SiBE04-302 Indoor Unit Step Procedure Points Disengage a hook from the backward. Since the fan bearing is made of rubber, push it strongly off from the inside. The bearing can be removed just as the left-side plate is attached with. Removal Procedure...

  • Page 161: Outdoor Unit

    Outdoor Unit SiBE04-302 2. Outdoor Unit Removal of External Casing Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points stop valve cover can be removed when the fixed screw is removed.
  • Page 162 SiBE04-302 Outdoor Unit Step Procedure Points The top plate and the front plate are constructed in a monoblock. Remove the three screws on the right side and the two screws on the front plate. Remove the three screws on the left side. Remove the one fixed The left side plate and the screw in the rear of the...
  • Page 163 Outdoor Unit SiBE04-302 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 164: Removal Of Bell Mouth And Left Side Plate

    SiBE04-302 Outdoor Unit Removal of Bell mouth Left Side Plate Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points The bell mouth is Remove the bell mouth from attached to the front the front plate after removing plate with two screws the two screws which are set...

  • Page 165: Removal Of Pcb And Electrical Box

    Outdoor Unit SiBE04-302 Removal of Electrical Box Procedure Warning Be sure to turn off all power supplies at least 10 min. 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 and remove the shelter.
  • Page 166 SiBE04-302 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 167 Outdoor Unit SiBE04-302 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 168 SiBE04-302 Outdoor Unit Step Procedure Points The PCB can completely be released. 3. Remove the electrical box. Remove the two screws fixing the electrical box. Removal Procedure...
  • Page 169 Outdoor Unit SiBE04-302 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 170 SiBE04-302 Outdoor Unit Step Procedure Points Slide the MID upward and release. Removal Procedure...

  • Page 171: Removal Of Propeller Fan And Fan Motor

    Outdoor Unit SiBE04-302 Removal of Propeller Fan Fan Motor Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points Disconnect the fan motor Remove the external plates connector S70. and the drip proof cover protecting the electric parts.
  • Page 172 SiBE04-302 Outdoor Unit Step Procedure Points Remove the fan motor. Removal Procedure...

  • Page 173: Removal Of Compressor Noise Absorption Pad

    Outdoor Unit SiBE04-302 Removal of Compressor Noise Absorption Pad Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points 1. Remove the right side plate. Remove the three screws for removing the right side plate.
  • Page 174 SiBE04-302 Outdoor Unit Step Procedure Points Pull out the noise absorption pad for the body. Pull out the top pad of Since the slit prepared for the noise absorption the piping on the noise (a). absorption pad is torn easily, remove the pad carefully.

  • Page 175: Removal Of Partition Plate And Reactor

    Outdoor Unit SiBE04-302 Removal of Partition Plate Reactor Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points 1. Remove the partition plate. Remove the two screws fixing the partition plate. Pull the partition plate upward to remove.
  • Page 176 SiBE04-302 Outdoor Unit Step Procedure Points When restoring the partition plate, fit the hook into the bottom frame. 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 177 Outdoor Unit SiBE04-302 Step Procedure Points Slide the reactor assembly this side and release. Removal Procedure...

  • Page 178: Removal Of Four Way Valve And Motor Valve

    SiBE04-302 Outdoor Unit Removal of Four Way Valve Motor Valve Procedure Warning Be sure to turn off all power supplies at least 10 min. 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 compressor so as not...
  • Page 179 Outdoor Unit SiBE04-302 Step Procedure Points Remove the motor valve coil. 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 brazing machine, so as not to Provide a protective get burnt on your hands.
  • Page 180 SiBE04-302 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 181: Removal Of Compressor

    Outdoor Unit SiBE04-302 Removal of Compressor Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points 1. Remove the parts around Be careful so as not to burn the compressor. the compressor terminals or the name plate.
  • Page 182 SiBE04-302 Outdoor Unit Step Procedure Points The mounting nut for Remove the four way valve the compressor is only and the motor valve also so one piece. as not to be burnt out. Remove the nut by an open-end wrench. Removal Procedure...
  • Page 183 Outdoor Unit SiBE04-302 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 184 SiBE04-302 Part 8 Others 1. Others ....................176 1.1 Explanation...................176 1.2 Jumper Settings ...................177 Others...

  • Page 185: Part 8 Others

    Others SiBE04-302 1. Others Explanation 1.1.1 Test Run from the Remote Controller Trial Operation and Testing 1. Measure the supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating mode. For Heat pump In cooling mode, select the lowest programmable temperature;...

  • Page 186: Jumper Settings

    SiBE04-302 Others Jumper Settings 1.2.1 When Two Units are Installed in One Room How to set the different addresses When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. PCB in the indoor unit Remove the front panel.
  • Page 187 Others SiBE04-302 1.2.3 Adjusting the Angle of the Intelligent Eye Sensor Once installation of the indoor unit is complete, adjust the angle of the Intelligent-eye sensor to ensure the detection area properly covers the room. (Adjustable angle : 15° to right and left of center) Gently push and slide the sensor to adjust the angle.

  • Page 188: Part 9 Appendix

    SiBE04-302 Part 9 Part 9 Part 9 Part 9 Appendix Appendix Appendix Appendix 1. Piping Diagrams..................180 1.1 Indoor Units ..................180 1.2 Outdoor Units ..................181 2. Wiring Diagrams..................183 2.1 Indoor Units ..................183 2.2 Outdoor Units ..................184 Appendix...

  • Page 189: Piping Diagrams

    Piping Diagrams SiBE04-302 Piping Diagrams Indoor Units FTKS25 / 35BVMB, ATKS25 / 35BVMB, FTK25 / 35BVMB, ATK25 / 35BVMB, FTS20 / 25 / 35BVMB FTXS25 / 35BVMB, ATXS25 / 35BVMB, FTX25 / 35BVMB, ATX25 / 35BVMB, FTYS20 / 25 / 35BVMB INDOOR UNIT HEAT EXCHANGER 7.0CuT...

  • Page 190: Outdoor Units

    SiBE04-302 Piping Diagrams Outdoor Units RKS25 / 35BVMB, ARKS25 / 35BVMB, RK35BVMB, ARK35BVMB, RS35BVMB 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...
  • Page 191 Piping Diagrams SiBE04-302 RXS25 / 35BVMB, ARXS25 / 35BVMB, RX35BVMB, ARX35BVMB, RYS35BVBM 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...

  • Page 192: Wiring Diagrams

    SiBE04-302 Wiring Diagrams Wiring Diagrams Indoor Units FTKS25 / 35BVMB, ATKS25 / 35BVMB, FTK25 / 35BVMB, ATK25 / 35BVMB FTXS25 / 35BVMB, ATXS25 / 35BVMB, FTX25 / 35BVMB, ATX25 / 35BVMB PCB3 PCB1 → INTELLIGENT- 3.15A EYE SENSOR outdoor TERMINAL FOR PCB2 / YLW FIELD WIRING.

  • Page 193: Outdoor Units

    Wiring Diagrams SiBE04-302 Outdoor Units RKS25 / 35BVMB, ARKS25 / 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 )
  • Page 194 SiBE04-302 Wiring Diagrams RXS25 / 35BVMB, ARXS25 / 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 )
  • Page 195 Wiring Diagrams SiBE04-302 Appendix...

  • Page 196: Index

    SiBE04-302 Index Index Index Index Numerics External Casing ............ 152 00 ................91 3 Minutes Stand-by ..........48 F3 ................. 103 F6 ................. 118 Fan Control ............51 A1................92 Fan Motor ............. 148, 162 A5................93 Fan Motor (AC Motor) or Related Abnormality..95 A6................95 Fan Rotor .............
  • Page 197 SiBE04-302 J4 ................177 Preparation before Operation......... 66 J6 ................107 Printed Circuit Board Connector Wiring Diagram... 24 JA ..............24, 177 Problem Symptoms and Measures ......89 JB ..............24, 177 Programme Dry Function ........34 JC..............24, 177 Propeller Fan............162 Jumper Settings ............177 Radiation Fin Temperature Rise ......
  • Page 198 SiBE04-302 V1................24 vertical blade ............137 Voltage Detection Function ........58 Wide-Angle Louvres..........32 Wiring Diagrams............183 Index...
  • Page 199 SiBE04-302 Index...

  • Page 200: Drawings & Flow Charts

    SiBE04-302 Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Inverter Units Refrigerant System Check ..... 125 ARC433A ..............90 Auto Swing ..............32 Location of Operation Lamp ........88 Automatic Air Flow Control for Cooling ....33 Automatic Air Flow Control for Heating ....33 Automatic Operation ..........35 Main Structural Parts...
  • Page 201 Head office: Zandvoordestraat 300, B-8400 Oostende, Belgium Umeda Center Bldg., 4-12, Nakazaki-Nishi 2-chome, Kita-ku, Osaka, 530-8323 Japan Tokyo office: Shinjuku Sumitomo Bldg., 6-1 Nishi-Shinjuku 2-chome, Shinjuku-ku, Tokyo, 163-0235 Japan For further improvement, specifications or designs are subject to change without prior notice. Printed in Japan 06/2003 AK COS...

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