Daikin D Series Service Manual
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Daikin D Series Service Manual

Inverter pair wall mounted type, cooling only, heat pump
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SiEBE04-507

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Summary of Contents for Daikin D Series

  • Page 1 Service Manual / Inverter Pair Wall Mounted Type D-Series SiEBE04-507...
  • Page 2 SiEBE04-507 Service Manual Inverter Pair Wall Mounted Type D-Series [Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump...
  • Page 3 SiEBE04-507 Inverter Pair D-Series Cooling Only Indoor Unit FTKS20DVMW(L) FTKS20DVMW9 FTKS20D2VMW(L) FTKS25DVMW(L) FTKS25DVMW9 FTKS25D2VMW(L) FTKS35DVMW(L) FTKS35DVMW9 FTKS35D2VMW(L) Outdoor Unit RKS20DVMB RKS20D2VMB RKS25DVMB RKS25D2VMB RKS35DVMB RKS35D2VMB Heat Pump Indoor Unit FTXS20DVMW(L) FTXS20DVMW9 FTXS20D2VMW(L) FTXS25DVMW(L) FTXS25DVMW9 FTXS25D2VMW(L) FTXS35DVMW(L) FTXS35DVMW9 FTXS35D2VMW(L) Outdoor Unit RXS20DVMB RXS20D2VMB RXS25DVMB...

  • Page 4: Table Of Contents

    SiEBE04-507 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 ....................9 Part 3 Printed Circuit Board Connector Wiring Diagram ... 15 1.
  • Page 5 SiEBE04-507 Part 5 System Configuration............53 1. System Configuration................54 2. Instruction....................55 2.1 Safety precautions..................55 2.2 Names of parts ..................57 2.3 Preparation before Operation..............60 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........63 2.5 Adjusting the Air Flow Direction .............65 2.6 POWERFUL Operation ................67 2.7 OUTDOOR UNIT SILENT Operation ............68 2.8 ECONO Operation .................69...
  • Page 6 SiEBE04-507 Part 7 Removal Procedure ............127 1. Indoor Unit...................128 1.1 Removal of Air Filter................128 1.2 Removal of Front Panel................130 1.3 Removal of Front Grille ................132 1.4 Removal of Horizontal Blades and Vertical Blades ......135 1.5 Removal of Electrical Box ..............138 1.6 Removal of PCB...................141 1.7 Removal of Drain Pan Unit..............147 1.8 Removal of Fan Motor................151...

  • Page 7: Introduction

    SiEBE04-507 Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. Warnings The caution items are classified into “ Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 8 Introduction SiEBE04-507 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 9 SiEBE04-507 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 10 Introduction SiEBE04-507 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 11: Part 1 List Of Functions

    SiEBE04-507 Part 1 List of Functions 1. List of Functions ..................2 List of Functions...

  • Page 12: List Of Functions

    List of Functions SiEBE04-507 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 Function –15 Photocatalytic Deodorizing Filter — —...
  • Page 13 SiEBE04-507 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 Function –15 Photocatalytic Deodorizing Filter — — Operation Limit for Heating (°CWB) —...
  • Page 14 List of Functions SiEBE04-507 Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — –10 –10 Virustatic Functions Operation Limit for Cooling (°CDB) Basic Function –15 Photocatalytic Deodorizing Filter — — Operation Limit for Heating (°CWB) —...

  • Page 15: Part 2 Specifications

    SiEBE04-507 Part 2 Specifications 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................9 Specifications...

  • Page 16: Specifications

    Specifications SiEBE04-507 1. Specifications Cooling Only 230V, 50Hz Indoor Units FTKS20D(2)VMW FTKS20DVMW9 FTKS20D(2)VML Models Outdoor Units RKS20D(2)VMB RKS20DVMB RKS20D(2)VMB 2.0 (1.3~2.6) 2.0 (1.3~2.6) 2.0 (1.3~2.6) Capacity Btu/h 6,820 (4,430~8,900) 6,820 (4,430~8,900) 6,820 (4,430~8,900) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 1,720 (1,120~2,240) 1,720 (1,120~2,240) Moisture Removal Running Current (Rated)
  • Page 17 SiEBE04-507 Specifications 230V, 50Hz Indoor Units FTKS25D(2)VMW FTKS25DVMW9 FTKS25D(2)VML Models Outdoor Units RKS25D(2)VMB RKS25DVMB RKS25D(2)VMB 2.5 (1.3~3.0) 2.5 (1.3~3.0) 2.5 (1.3~3.0) Capacity Btu/h 8,550 (4,450~10,250) 8,550 (4,450~10,250) 8,550 (4,450~10,250) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,150 (1,120~2,580) 2,150 (1,120~2,580) Moisture Removal Running Current (Rated) Power Consumption 685 (300~960)
  • Page 18 Specifications SiEBE04-507 230V, 50Hz Indoor Units FTKS35D(2)VMW FTKS35DVMW9 FTKS35D(2)VML Models Outdoor Units RKS35D(2)VMB RKS35DVMB RKS35D(2)VMB 3.4 (1.4~3.8) 3.4 (1.4~3.8) 3.4 (1.4~3.8) Capacity Btu/h 11,600 (4,750~12,950) 11,600 (4,750~12,950) 11,600 (4,750~12,950) Rated (Min.~Max.) kcal/h 2,920 (1,200~3,270) 2,920 (1,200~3,270) 2,920 (1,200~3,270) Moisture Removal Running Current (Rated) Power Consumption 1,045 (300~1,270)

  • Page 19: Heat Pump

    SiEBE04-507 Specifications Heat Pump 230V, 50Hz Indoor Units FTXS20D(2)VMW FTXS20DVMW9 Models RXS20D(2)VMB RXS20DVMB Outdoor Units Cooling Heating Cooling Heating 2.0 (1.3~2.6) 2.7 (1.3~4.1) 2.0 (1.3~2.6) 2.7 (1.3~4.1) Capacity Btu/h 6,820 (4,430~8,900) 9,210 (4,430~14,000) 6,820 (4,430~8,900) 9,210 (4,430~14,000) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 2,320 (1,120~3,530) 1,720 (1,120~2,240)
  • Page 20 Specifications SiEBE04-507 230V, 50Hz Indoor Units FTXS20D(2)VML Models RXS20D(2)VMB Outdoor Units Cooling Heating 2.0 (1.3~2.6) 2.7 (1.3~4.1) Capacity Btu/h 6,820 (4,430~8,900) 9,210 (4,430~14,000) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 2,320 (1,120~3,530) Moisture Removal — Running Current (Rated) Power Consumption 490 (300~830) 660 (290~1,300) Rated (Min.~Max.) Power Factor...
  • Page 21 SiEBE04-507 Specifications 230V, 50Hz Indoor Units FTXS25D(2)VMW FTXS25DVMW9 Models RXS25D(2)VMB RXS25DVMB Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.5) 2.5 (1.3~3.0) 3.4 (1.3~4.5) Capacity Btu/h 8,550 (4,450~10,250) 11,600 (4,450~15,350) 8,550 (4,450~10,250) 11,600 (4,450~15,350) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,920 (1,120~3,870) 2,150 (1,120~2,580) 2,920 (1,120~3,870)
  • Page 22 Specifications SiEBE04-507 230V, 50Hz Indoor Units FTXS25D(2)VML Models RXS25D(2)VMB Outdoor Units Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.5) Capacity Btu/h 8,550 (4,450~10,250) 11,600 (4,450~15,350) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,920 (1,120~3,870) Moisture Removal — Running Current (Rated) Power Consumption 685 (300~960) 920 (290~1,430) Rated (Min.~Max.) Power Factor...
  • Page 23 SiEBE04-507 Specifications 230V, 50Hz Indoor Units FTXS35D(2)VMW FTXS35DVMW9 Models RXS35D(2)VMB RXS35DVMB Outdoor Units Cooling Heating Cooling Heating 3.4 (1.4~3.8) 4.0 (1.4~5.0) 3.4 (1.4~3.8) 4.0 (1.4~5.0) Capacity Btu/h 11,600 (4,750~12,950) 16,500 (4,750~17,050) 11,600 (4,750~12,950) 16,500 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,920 (1,200~3,270) 3,440 (1,200~4,300) 2,920 (1,200~3,270) 3,440 (1,200~4,300)
  • Page 24 Specifications SiEBE04-507 230V, 50Hz Indoor Units FTXS35D(2)VML Models RXS35D(2)VMB Outdoor Units Cooling Heating 3.4 (1.4~3.8) 4.0 (1.4~5.0) Capacity Btu/h 11,600 (4,750~12,950) 16,500 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,920 (1,200~3,270) 3,440 (1,200~4,300) Moisture Removal — Running Current (Rated) Power Consumption 1,045 (300~1,270) 1,155 (310~1,560) Rated (Min.~Max.) Power Factor...

  • Page 25: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiEBE04-507 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........16 1.1 Indoor Unit....................16 1.2 Outdoor Unit ...................18 Printed Circuit Board Connector Wiring Diagram...

  • Page 26: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram SiEBE04-507 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors 1) S1 Connector for fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S21 Connector for centralized control (HA) 4) S26 Connector for display PCB 5) S27, S29, S36 Connector for control PCB 6) S28...
  • Page 27 SiEBE04-507 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB LED A (R4288) PCB(2): Signal Receiver PCB PCB(3): Display PCB LED1 LED2 LED3 RTH1 (R4289) (R4290) PCB(4): INTELLIGENT EYE sensor PCB (R4291) Printed Circuit Board Connector Wiring Diagram...

  • Page 28: Outdoor Unit

    Printed Circuit Board Connector Wiring Diagram SiEBE04-507 Outdoor Unit Connectors 1) S10 Connector for filter PCB 2) S11 Connector for control PCB 3) S20 Connector for electronic expansion valve coil 4) S30 Connector for compressor motor 5) S40 Connector for overload protector 6) S70 Connector for fan motor 7) S80...
  • Page 29 SiEBE04-507 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 30 Printed Circuit Board Connector Wiring Diagram SiEBE04-507 Printed Circuit Board Connector Wiring Diagram...

  • Page 31: Part 4 Function And Control

    SiEBE04-507 Part 4 Function and Control 1. Main Functions..................22 1.1 Frequency Principle................22 1.2 Air Flow Direction Control...............24 1.3 Fan Speed Control for Indoor Units............25 1.4 Programme Dry Function ...............26 1.5 Automatic Operation................27 1.6 Thermostat Control.................28 1.7 NIGHT SET Mode ..................29 1.8 ECONO Mode ..................30 1.9 INTELLIGENT EYE ................31 1.10 Inverter POWERFUL Operation .............33...

  • Page 32: Main Functions

    Main Functions SiEBE04-507 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 33 SiEBE04-507 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 34: Air Flow Direction Control

    Main Functions SiEBE04-507 Air Flow Direction Control 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. The flap presses the warm air above the floor to reach the entire room.

  • Page 35: Fan Speed Control For Indoor Units

    SiEBE04-507 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 91.

  • Page 36: Programme Dry Function

    Main Functions SiEBE04-507 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 37: Automatic Operation

    SiEBE04-507 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 38: Thermostat Control

    Main Functions SiEBE04-507 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 39: Night Set Mode

    SiEBE04-507 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 40: Econo Mode

    Main Functions SiEBE04-507 ECONO Mode Outline The "ECONO mode" reduces the maximum operating current and power consumption by approx. 30% during start up etc.. This mode is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.

  • Page 41: Intelligent Eye

    SiEBE04-507 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. Processing 1.
  • Page 42 Main Functions SiEBE04-507 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 43: Inverter Powerful Operation

    SiEBE04-507 Main Functions 1.10 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Details of the When POWERFUL button is pushed in each operation mode, the fan speed / setting Control temperature will be converted to the following states in a period of twenty minutes.

  • Page 44: Other Functions

    Main Functions SiEBE04-507 1.11 Other Functions 1.11.1 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 45: Function Of Thermistor

    SiEBE04-507 Function of Thermistor 2. Function of Thermistor Heat Pump Model Four way valve Compressor (R3305) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. Exchanger The system sets a target discharge temperature according to the outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve opening so that the Thermistor (DCB) target discharge temperature can be obtained.

  • Page 46: Cooling Only Model

    Function of Thermistor SiEBE04-507 Cooling Only Model Compressor (R2828) A 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 47: Control Specification

    SiEBE04-507 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 48: Frequency Control

    Control Specification SiEBE04-507 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 49 SiEBE04-507 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 50: Controls At Mode Changing / Start-Up

    Control Specification SiEBE04-507 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 51: Discharge Pipe Control

    SiEBE04-507 Control Specification 3.3.4 3-minutes 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 52: Input Current Control

    Control Specification SiEBE04-507 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 53: Freeze-Up Protection Control

    SiEBE04-507 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 54: Fan Control

    Control Specification SiEBE04-507 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 55: Defrost Control

    SiEBE04-507 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 56: Electronic Expansion Valve Control

    Control Specification SiEBE04-507 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 57 SiEBE04-507 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 58 Control Specification SiEBE04-507 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 temperature, and adjust the electronic expansion valve opening so that the actual discharge...

  • Page 59: Malfunctions

    SiEBE04-507 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 and Over Current Outline In order to protect the inverter, detect an excessive output current, and for protecting compressor, monitor the OL operation.

  • Page 60: Forced Operation Mode

    Control Specification SiEBE04-507 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 61: Facility Setting Jumper (Cooling At Low Outdoor Temperature)

    SiEBE04-507 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 62 Control Specification SiEBE04-507 Function and Control...

  • Page 63: Part 5 System Configuration

    SiEBE04-507 Part 5 System Configuration 1. System Configuration................54 2. Instruction....................55 2.1 Safety precautions..................55 2.2 Names of parts ..................57 2.3 Preparation before Operation..............60 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........63 2.5 Adjusting the Air Flow Direction .............65 2.6 POWERFUL Operation ................67 2.7 OUTDOOR UNIT SILENT Operation ............68 2.8 ECONO Operation .................69...

  • Page 64: System Configuration

    System Configuration SiEBE04-507 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 65: 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 66 Instruction SiEBE04-507 • 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 67: Names Of Parts

    SiEBE04-507 Instruction Names of parts Indoor Unit ON/OFF System Configuration...
  • Page 68 Instruction SiEBE04-507 Outdoor Unit Indoor Unit 12. Indoor Unit ON/OFF switch: (page 10.) 1. Air filter 2. Titanium Apatite Photocatalytic • Push this switch once to start operation. Push once again to stop it. Air-Purifying Filter: • These filters are attached to the inside of the •...
  • Page 69 SiEBE04-507 Instruction Remote Controller ECONO ON/OFF TEMP POWERFUL MODE SWING SILENT COMFORT SENSOR CANCEL TIMER < > ARC433A50, 43 1. Signal transmitter: 8. SILENT button: OUTDOOR UNIT SILENT • It sends signals to the indoor unit. operation (page 15.) 2. Display: 9.

  • Page 70: Preparation Before Operation

    Instruction SiEBE04-507 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 71 SiEBE04-507 Instruction To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate.
  • Page 72 Instruction SiEBE04-507 To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. Holding down “ ” or “ ” button ECONO ON/OFF rapidly increases or decreases the TEMP time display.

  • Page 73: Auto · Dry · Cool · Heat · Fan Operation

    SiEBE04-507 Instruction AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode. To start operation 1.
  • Page 74 Instruction SiEBE04-507 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 75: Adjusting The Air Flow Direction

    SiEBE04-507 Instruction Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. To adjust the horizontal blades (flaps) 1. Press “SWING button”. • “ ” is displayed on the LCD and the flaps will begin to swing. 2.
  • Page 76 Instruction SiEBE04-507 To start COMFORT AIRFLOW operation 3. Press “COMFORT AIRFLOW button”. The flap position will change, preventing air from blowing directly on the occupants of the room. • “ ” is displayed on the LCD. 〈COOL/DRY〉 The flap will go up. 〈HEAT〉...

  • Page 77: Powerful Operation

    SiEBE04-507 Instruction POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity . To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates ECONO ON/OFF again with the settings which were used...

  • Page 78: Outdoor Unit Silent Operation

    Instruction SiEBE04-507 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 convenient during night. To start OUTDOOR UNIT SILENT operation 1.

  • Page 79: Econo Operation

    SiEBE04-507 Instruction ECONO Operation ECONO operation is a function which enables efficient operation by lowering the maximum power consumption value. To start ECONO operation 1. Press “ECONO button” . • “ ” is displayed on the LCD. To cancel ECONO operation 2.

  • Page 80: Intelligent Eye Operation

    Instruction SiEBE04-507 INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. ■ To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. ■ To cancel the ECONO ON/OFF INTELLIGENT EYE TEMP POWERFUL...
  • Page 81 SiEBE04-507 Instruction “INTELLIGENT EYE” is useful for Energy Saving Energy saving operation • Change the temperature –2°C in heating / +2°C in cooling / +2°C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...

  • Page 82: Timer Operation

    Instruction SiEBE04-507 2.10 TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...
  • Page 83 SiEBE04-507 Instruction To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time (page 9.). 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the ECONO point you like.

  • Page 84: Care And Cleaning

    Instruction SiEBE04-507 2.11 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 panel 1. Open the front panel. •...
  • Page 85 SiEBE04-507 Instruction Filters 1. Open the front panel. (page 23.) 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the Titanium Apatite Photocatalytic Air-Purifying Filter.
  • Page 86 Instruction SiEBE04-507 NOTE • Operation with dirty filters: (1) cannot deodorize the air. (2) cannot clean the air. (3) results in poor heating or cooling. (4) may cause odour. • To order Titanium Apatite Photocatalytic Air-Purifying Filter contact to the service shop there you bought the air conditioner.

  • Page 87: Troubleshooting

    SiEBE04-507 Instruction 2.12 Troubleshooting These cases are not troubles. The following cases are not air conditioner troubles but have some reasons. You may just continue using it. Case Explanation • This is to protect the air conditioner. Operation does not start soon. You should wait for about 3 minutes.
  • Page 88 Instruction SiEBE04-507 Check again. Please check again before calling a repair person. Check Case • Hasn’t a breaker turned OFF or a fuse blown? The air conditioner does not operate. • Isn’t it a power failure? (OPERATION lamp is off) •...
  • Page 89 SiEBE04-507 Instruction 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 90 Instruction SiEBE04-507 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 91: Part 6 Service Diagnosis

    SiEBE04-507 Part 6 Service Diagnosis 1. Caution for Diagnosis................82 2. Problem Symptoms and Measures ............83 3. Service Check Function ................84 4. Troubleshooting ..................87 4.1 Error Codes and Description ..............87 4.2 Indoor Unit PCB Abnormality ..............88 4.3 Freeze-up Protection Control or High Pressure Control......89 4.4 Fan Motor (DC Motor) or Related Abnormality........91 4.5 Thermistor or Related Abnormality (Indoor Unit)........93 4.6 Signal Transmission Error (between Indoor and Outdoor Unit) .....94...

  • Page 92: Caution For Diagnosis

    Caution for Diagnosis SiEBE04-507 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 93: Problem Symptoms And Measures

    SiEBE04-507 Problem Symptoms and Measures 2. 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 94: Service Check Function

    Service Check Function SiEBE04-507 3. 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 95 SiEBE04-507 Service Check Function Check Method 2 1. Enter the diagnosis mode. s ,TEMP t , MODE) simultaneously. Press the 3 buttons (TEMP (R4272) The digit of the number of tens blinks. HTry again from the start when the digit does not blink. (R4273) 2.
  • Page 96 Service Check Function SiEBE04-507 5. Press the TEMP button. s or TEMP t and change the digit until you hear the sound of “beep”. Press TEMP (R4277) 6. Diagnose by the sound. H“ pi ” : The both numbers of tens and units do not accord with the error code. H“...

  • Page 97: Troubleshooting

    SiEBE04-507 Troubleshooting 4. Troubleshooting Error Codes and Description Reference Code Indication Description Page System — Normal Insufficient gas Over-voltage detection Signal transmission error (between indoor and outdoor 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...

  • Page 98: Indoor Unit Pcb Abnormality

    Troubleshooting SiEBE04-507 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 99: Freeze-Up Protection Control Or High Pressure Control

    SiEBE04-507 Troubleshooting Freeze-up Protection Control or 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 100 Troubleshooting SiEBE04-507 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Refer to P.122 Check the air passage. Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Clean the air filter.

  • Page 101: Fan Motor (Dc Motor) Or Related Abnormality

    SiEBE04-507 Troubleshooting Fan Motor (DC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction When the detected rotation speed is less than 50% of the H tap under maximum fan motor rotation demand.
  • Page 102 Troubleshooting SiEBE04-507 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.01 Turn off power supply and rotate fan by hand. Refer to P.120 Does fan rotate Replace fan motor. smoothly? Turn power ON and operate fan.

  • Page 103: Thermistor Or Related Abnormality (Indoor Unit)

    SiEBE04-507 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) C4, C9 Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor Decision operation∗.

  • Page 104: Signal Transmission Error (Between Indoor And Outdoor Unit)

    Troubleshooting SiEBE04-507 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 Malfunction checked whether it is normal. Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of Decision the data is abnormal.

  • Page 105: Unspecified Voltage (Between Indoor And Outdoor Units)

    SiEBE04-507 Troubleshooting 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 Malfunction indoor / outdoor transmission signal. Detection Malfunction The pair type and multi type are interconnected. Decision Conditions Supposed...

  • Page 106: Outdoor Unit Pcb Abnormality

    Troubleshooting SiEBE04-507 Outdoor Unit PCB Abnormality Remote Controller Display Method of The system follows the microprocessor program to make sure it runs normally. Malfunction The system checks to see if the zero-cross signal comes in properly. Detection Malfunction The microprocessor program runs out of control. The zero-cross signal is not detected.

  • Page 107: Ol Activation (Compressor Overload)

    SiEBE04-507 Troubleshooting OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will be shut down. Decision The error counter will reset itself if this or any other error does not occur during the following 60-minute compressor running time (total time).

  • Page 108: Compressor Lock

    Troubleshooting SiEBE04-507 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. Decision The system judges the compressor lock, and cannot operation with position detection within 15 seconds after start up.

  • Page 109: Dc Fan Lock

    SiEBE04-507 Troubleshooting 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. Decision The system will be shut down if the error occurs 16 times.

  • Page 110: Input Over Current Detection

    Troubleshooting SiEBE04-507 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. Decision Cooling / Heating: Above 12A Conditions...

  • Page 111: Four Way Valve Abnormality

    SiEBE04-507 Troubleshooting 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 112 Troubleshooting SiEBE04-507 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 113: Discharge Pipe Temperature Control

    SiEBE04-507 Troubleshooting 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 Decision system will be shut down.

  • Page 114: High Pressure Control In Cooling

    Troubleshooting SiEBE04-507 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 Decision...
  • Page 115 SiEBE04-507 Troubleshooting 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 Check the installation space. Check No.6 Check No.7 Abnormal Installation condition Change the air outlet grille Refer to P.122 check position.

  • Page 116: Compressor System Sensor Abnormality

    Troubleshooting SiEBE04-507 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 117: Position Sensor Abnormality

    SiEBE04-507 Troubleshooting 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 Decision is sent.

  • Page 118: Dc Voltage / Current Sensor Abnormality

    Troubleshooting SiEBE04-507 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. Decision (The input current is also below 0.5 A.) If this error repeats 4 times, the system will be shut down.

  • Page 119: Thermistor Or Related Abnormality (Outdoor Unit)

    SiEBE04-507 Troubleshooting 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 120 Troubleshooting SiEBE04-507 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn on the power again. Check No.6 Refer to P.122 Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.

  • Page 121: Electrical Box Temperature Rise

    SiEBE04-507 Troubleshooting 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 Decision temperature drops below 70°C.
  • Page 122 Troubleshooting SiEBE04-507 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 80°C and stops itself when it...

  • Page 123: Radiation Fin Temperature Rise

    SiEBE04-507 Troubleshooting 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 . Decision If a radiation fin temperature rise takes place 4 times successively, the system will be shut down.
  • Page 124 Troubleshooting SiEBE04-507 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 125: Output Over Current Detection

    SiEBE04-507 Troubleshooting 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. Decision A speed error occurs while the compressor is running.
  • Page 126 Troubleshooting SiEBE04-507 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.7 ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and reconnected for part replacement, for example, and the system is interrupted by an output over-current, Refer to P.123 take the following procedure.

  • Page 127: Insufficient Gas

    SiEBE04-507 Troubleshooting 4.23 Insufficient Gas Remote Controller Display Method of Gas shortage detection I : A gas shortage is detected by checking the compressor running Malfunction 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 128 Troubleshooting SiEBE04-507 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 Check No.6 * Room temperature thermistor * Outdoor air thermistor...

  • Page 129: Over-Voltage Detection

    SiEBE04-507 Troubleshooting 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 Decision (The voltage is over 400V).

  • Page 130: Check

    Check SiEBE04-507 5. Check How to Check 5.1.1 Fan Motor Connector Output Check Check No.01 1. Check connector connection. 2. Check motor power supply voltage output (pins 4-7). 3. Check motor control voltage (pins 4-3). 4. Check rotation command voltage output (pins 4-2). 5.
  • Page 131 SiEBE04-507 Check 5.1.3 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 132 Check SiEBE04-507 5.1.4 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 133 SiEBE04-507 Check 5.1.5 Installation Condition Check Check No.7 Installation condition check Check the allowable Abnormal dimensions of the air suction Change the position of the air and discharge discharge grille or the 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 134 Check SiEBE04-507 5.1.7 Outdoor Unit Fan System Check Check No.9 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. (R2 8 57) 5.1.8 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between pins 1 and 3 on the terminal board, and check...
  • Page 135 SiEBE04-507 Check 5.1.10 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 136 Check SiEBE04-507 Service Diagnosis...

  • Page 137: Part 7 Removal Procedure

    SiEBE04-507 Part 7 Removal Procedure 1. Indoor Unit...................128 1.1 Removal of Air Filter................128 1.2 Removal of Front Panel................130 1.3 Removal of Front Grille ................132 1.4 Removal of Horizontal Blades and Vertical Blades ......135 1.5 Removal of Electrical Box ..............138 1.6 Removal of PCB...................141 1.7 Removal of Drain Pan Unit..............147 1.8 Removal of Fan Motor................151 1.9 Removal of Heat Exchanger ..............153...

  • Page 138: Indoor Unit

    Indoor Unit SiEBE04-507 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. Appearance feature Warning! Dangerous: High voltage A high voltage is applied to all the electric circuits of this product including thermistors.
  • Page 139 SiEBE04-507 Indoor Unit Step Procedure Points 3. Removing the titanium apatite photocatalytic air- purifying filter The titanium apatite The titanium apatite photocatalytic air- photocatalytic air-purifying purifying filter is filter is not marked for Air filter attached to the back of difference between the right the air filter.

  • Page 140: Removal Of Front Panel

    Indoor Unit SiEBE04-507 Removal of Front Panel Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the front panel Put your fingers on the right and left projections of the front panel, and open the panel over the position where it will...
  • Page 141 SiEBE04-507 Indoor Unit Step Procedure Points Remove the front panel. Caution on Mounting When mounting the front panel, fit the right and left rotary shafts one by one into the grooves and fully push them in position. (R4316) Removal Procedure...

  • Page 142: Removal Of Front Grille

    Indoor Unit SiEBE04-507 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. Removing the service cover Remove the screw of Preparation the service cover. Remove the front panel according to the “Removal of Front Panel.”...
  • Page 143 SiEBE04-507 Indoor Unit Step Procedure Points Remove the screw covers (one each at the right and left). (R4 3 21) Remove the screws When installing the indoor (one each at the right unit, drive the screws with and left). the horizontal blades open or removed.
  • Page 144 Indoor Unit SiEBE04-507 Step Procedure Points Put your fingers into the front grille and lift the grille up to unfasten the center hook. (R4 3 25) Unfasten the right hook also by putting your fingers into the grille and lifting it. (R4 3 26) Remove the front grille Caution on Mounting...

  • Page 145: Removal Of Horizontal Blades And Vertical Blades

    SiEBE04-507 Indoor Unit Removal of Horizontal Blades and Vertical Blades Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the horizontal blade (large) Open the horizontal Cautions on Mounting blade (large).
  • Page 146 Indoor Unit SiEBE04-507 Step Procedure Points 2. Removing the horizontal blade (small) Remove the horizontal blade (small) while bending the fixed part Horizontal blade (small) at the center slightly. (R4332) Unfasten the left side. Unfasten the key type fixing shaft at the right side.
  • Page 147 SiEBE04-507 Indoor Unit Step Procedure Points 3. Removing the vertical blade Unfasten the hooks at the shaft mounting part by pressing them with a flat screwdriver. Hooks Unfasten the hooks at (R4335) the upper 2 positions. Remove the vertical Six vertical blades are blade toward yourself.

  • Page 148: Removal Of Electrical Box

    Indoor Unit SiEBE04-507 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 The figure shows the Preparation Electrical connections of wire Remove the front grille component box harnesses.
  • Page 149 SiEBE04-507 Indoor Unit Step Procedure Points Remove the drip proof Put any excess wires behind plate by removing the the power supply lead wire. screw. Drip proof plate (R4343) Replace the heat exchanger thermistor. Use care not to lose the retainer of thermistor.
  • Page 150 Indoor Unit SiEBE04-507 Step Procedure Points Release the hook at the upper far side by Hook pressing it from above and pulling the box toward yourself. (R4347) Lift up the electrical box There is a hook also at the and pull it toward lower part of the back.

  • Page 151: Removal Of Pcb

    SiEBE04-507 Indoor Unit Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the shelter The figure shows the Preparation appearance of the Remove the electrical box electrical box.
  • Page 152 Indoor Unit SiEBE04-507 Step Procedure Points 3. Removing the terminal board Dismount the terminal board by removing the screw. Terminal board (R4354) 4. Removing the signal receiver unit Remove the signal receiver unit by Signal receiver unit unfastening the hooks (one each at the right Hook Hook...
  • Page 153 SiEBE04-507 Indoor Unit Step Procedure Points Remove the electrical Hook box by sliding it to the left. Hook (R4358) Disconnect the wire harness. 5. Removing the signal receiver PCB Remove the signal receiver PCB by opening the hooks at 3 positions.
  • Page 154 Indoor Unit SiEBE04-507 Step Procedure Points 6. Removing the INTELLIGENT EYE PCB Remove the INTELLIGENT EYE INTELLIGENT EYE fixing plate by twisting it fixing plate clockwise. (R4363) Remove the INTELLIGENT EYE PCB by unfastening the hook. Hook (R4364) Disconnect the connector from the INTELLIGENT EYE PCB.
  • Page 155 SiEBE04-507 Indoor Unit Step Procedure Points 7. Removing the display The figure shows the connection of wire harness for the display PCB. Display PCB (R4366) Remove the display PCB by unfastening the 2 hooks. Hook (R4367) Disconnect the connector from the display PCB.
  • Page 156 Indoor Unit SiEBE04-507 Step Procedure Points Lift up the bottom of the When mounting the control control PCB and pull it PCB, make sure that it is Fixing hook out. fixed by upper hooks. Fixing hook (R4370) The figures show the Lead-free solder (PbF) is names of the PCB used for the PCB.

  • Page 157: Removal Of Drain Pan Unit

    SiEBE04-507 Indoor Unit Removal of Drain Pan Unit Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points 1. Removing the drain pan Preparation unit Remove the electrical box according to the “Removal Lift up the indoor unit of Electrical Box.”...
  • Page 158 Indoor Unit SiEBE04-507 Step Procedure Points Remove the drain pan Caution on Mounting toward yourself from Make sure that the hook at the indoor unit body. the left side is fitted in the groove. Hook (R4379) 2. Removing the swing motor Remove the screw of the swing motor.
  • Page 159 SiEBE04-507 Indoor Unit Step Procedure Points 3. Removing the crank assembly Crank assembly Remove the screw of the crank assembly. (R4382) Remove the crank assembly by unfastening the hook. Hook (R4383) The figure shows the position of the hook when the crank Hook inserting part assembly has been removed.
  • Page 160 Indoor Unit SiEBE04-507 Step Procedure Points Remove the drain cap (Left side) located at the left side of the drain pan unit. Drain cap Insert the drain hose to the left side. (Left side) (R4387) Press the removed Use a 4mm Allen wrench. (Right side) drain plug into the right side with an Allen...

  • Page 161: Removal Of Fan Motor

    SiEBE04-507 Indoor Unit Removal of Fan Motor Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points Undo the fan motor Preparation lead wires from the Remove the drain pan unit hooks.
  • Page 162 Indoor Unit SiEBE04-507 Step Procedure Points Unfasten the hook (a) of the fan motor fixing plate with your thumb. Hook(c) Hook(a) (R4392) Unfasten the hook (c). Hook(c) Hook(a) (R4393) Remove the fan motor. Removal Procedure...

  • Page 163: Removal Of Heat Exchanger

    SiEBE04-507 Indoor Unit Removal of Heat Exchanger Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points 1. Disconnecting the Preparation refrigerant pipe Remove the drain pan unit according to the “Removal Remove the screws of Drain Pan Unit.”...
  • Page 164 Indoor Unit SiEBE04-507 Step Procedure Points 2. Removing the indoor unit Remove the indoor unit from the installation plate. 3. Removing the heat exchanger Unfasten the hook of the pipe fixing plate at the back of the unit and pull out the pipe. Widen the auxiliary pipe Unbending angle: by about 10-20...
  • Page 165 SiEBE04-507 Indoor Unit Step Procedure Points After unfastening the When mounting the heat lower hooks, hold up exchanger, make sure that the heat exchanger by the hook (left) is fastened. its left side and lift it up toward yourself. Hook (left) Hook (left) (R4404)

  • Page 166: Removal Of Fan Rotor

    Indoor Unit SiEBE04-507 1.10 Removal of Fan Rotor Procedure Warning Be sure to turn off all power supplies at least 10 min. before disassembling work. Step Procedure Points 1. Removing the drip proof Preparation Drip proof plate (right) plate Remove the heat exchanger according to the “Removal of Heat Exchanger.”...
  • Page 167 SiEBE04-507 Indoor Unit Step Procedure Points Unfasten the hook (a) of the fan motor fixing plate with your thumb and unfasten the hook Hook (c) (b). Hook (a) (R4410) The fan motor fixing plate can be removed from the unit when the motor fixing hook (c) is unfastened.
  • Page 168 Indoor Unit SiEBE04-507 Step Procedure Points 3. Removing the bearing Remove the screw of the drip proof plate (left). The drip proof plate can be removed when the hooks at 2 positions are unfastened. Hook Hook (R4415) Press the rubber-made bearing with force from outside.

  • Page 169: Outdoor Unit

    SiEBE04-507 Outdoor Unit 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 Handle (R3235) Take care not to cut your finger by the fins of the heat exchanger.
  • Page 170 Outdoor Unit SiEBE04-507 Step Procedure Points 2. Remove the panels. Top panel Loosen the 3 screws (front, right, left) and lift the top panel. (R3239) Remove the drip proof Drip proof plate plate. (R3240) Disconnect the The fan motor is united with connector for fan motor the front panel.
  • Page 171 SiEBE04-507 Outdoor Unit 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. Hooks (R3243) 3. Remove the fan motor. The screw has reverse winding.
  • Page 172 Outdoor Unit SiEBE04-507 Step Procedure Points Loosen the 2 screws Bell mouth and lift the bell mouth to undo the hooks. Remove the bell mouth. Hooks (R3246) Loosen the fixing hooks Put the lead wire through the and release the lead back of the motor when wire.
  • Page 173 SiEBE04-507 Outdoor Unit Step Procedure Points Loosen the 4 screws to M4×16 remove the fan motor. DC fan motor Fan motor (R3250) Loosen the 2 screws to remove the fan motor fixing frame. Fan motor fixing frame (R3251) Removal Procedure...
  • Page 174 Outdoor Unit SiEBE04-507 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. Right side panel (R3254) Loosen the screw and lift the connection port to remove.
  • Page 175 SiEBE04-507 Outdoor Unit Step Procedure Points When reassembling, make sure to fit the hook. Hook (R3257) Removal Procedure...

  • Page 176: Removal Of Electrical Box

    Outdoor Unit SiEBE04-507 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 177 SiEBE04-507 Outdoor Unit Step Procedure Points Release the discharge Pay attention so as not to pipe thermistor. lose the clip for thermistor. Thermistor Clip Piping (R3262) Discharge pipe thermistor (R3261) Release the heat Pay attention so as not to exchanger thermistor. lose the clip.

  • Page 178: Removal Of Reactor And Partition Plate

    Outdoor Unit SiEBE04-507 Removal of Reactor and 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. Reactor Remove the electrical box. 1.
  • Page 179 SiEBE04-507 Outdoor Unit Step Procedure Points The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. When reassembling, fit the lower hook into the bottom frame. Hook (R3270) Removal Procedure...

  • Page 180: Removal Of Sound Blanket

    Outdoor Unit SiEBE04-507 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 181 SiEBE04-507 Outdoor Unit 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 182: Removal Of Four Way Valve

    Outdoor Unit SiEBE04-507 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 183 SiEBE04-507 Outdoor Unit Step Procedure Points Remove the sheets of putty. Cut the pipe with a tube cutter. Tube cutter (R3280) Heat up the brazed part Provide a protective sheet or and withdraw the piping a steel plate so that the with pliers.

  • Page 184: Removal Of Compressor

    Outdoor Unit SiEBE04-507 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 185 SiEBE04-507 Outdoor Unit Step Procedure Points Heat up the brazed part of the suction side and disconnect. Lift the compressor up and remove it. Removal Procedure...

  • Page 186: Removal Of Pcb

    Outdoor Unit SiEBE04-507 Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 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 187 SiEBE04-507 Outdoor Unit Step Procedure Points Loosen the 4 screws. Undo the 3 hooks on Hooks the upper side. (R3290) Lift and pull out the PCB. Removal Procedure...
  • Page 188 Outdoor Unit SiEBE04-507 Step Procedure Points Feature of the PCB S70: fan motor Glass fuse PbF (Pb free soldering) 3.15A S80: four way valve S90: thermistor (outdoor air, heat exchanger, discharge pipe) Glass fuse Varistor LED A (R4591) Removal Procedure...

  • Page 189: Part 8 Others

    SiEBE04-507 Part 8 Others 1. Others ....................180 1.1 Test Run from the Remote Controller ..........180 1.2 Jumper Settings ...................181 Others...

  • Page 190: Others

    Others SiEBE04-507 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 191: Jumper Settings

    SiEBE04-507 Others Jumper Settings 1.2.1 When Two Units are Installed in One Room When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. How to set the different addresses Control PCB of the indoor unit (1) Remove the front grille.
  • Page 192 Others SiEBE04-507 Others...

  • Page 193: Part 9 Appendix

    SiEBE04-507 Part 9 Appendix 1. Piping Diagrams..................184 1.1 Indoor Units ..................184 1.2 Outdoor Units ..................185 2. Wiring Diagrams..................187 2.1 Indoor Units ..................187 2.2 Outdoor Units ..................187 Appendix...

  • Page 194: Piping Diagrams

    Piping Diagrams SiEBE04-507 1. Piping Diagrams Indoor Units FTK(X)S20/25/35DVMW(L), FTK(X)S20/25/35DVMW9, FTK(X)S20/25/35D2VMW(L) INDOOR UNIT MAFFLER ASSY HEAT EXCHANGER 7.0CuT 6.4CuT THERMISTOR 6.4CuT ON HEAT EXCH. 6.4CuT CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) FAN MOTOR REFRIGERANT FLOW 9.5CuT FIELD PIPING COOLING ( 9.5CuT ) HEATING...

  • Page 195: Outdoor Units

    SiEBE04-507 Piping Diagrams Outdoor Units 1.2.1 Cooling Only RKS20/25DVMB, RKS20/25D2VMB 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 VALVE...
  • Page 196 Piping Diagrams SiEBE04-507 1.2.2 Heat Pump RXS20/25DVMB, RXS20/25D2VMB 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 VALVE ON : HEATING...

  • Page 197: Wiring Diagrams

    SiEBE04-507 Wiring Diagrams 2. Wiring Diagrams Indoor Units FTK(X)S20/25/35DVMBW(L), FTK(X)S20/25/35DVMW9, FTK(X)S20/25/35D2VMW(L) FIELD WIRING. PCB3 PCB1 LED1 RECTIFIER 3.15A LED2 OUTDOOR CAUTION LED3 TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
  • Page 198 Wiring Diagrams SiEBE04-507 Appendix...

  • Page 199: Index

    SiEBE04-507 Index Numerics compressor overload ..........97 compressor protection function ......41 00 ................87 compressor system sensor abnormality ....106 3-minutes standby ..........34, 41 connectors ............16, 18 control PCB (indoor unit) ........17 control PCB (outdoor unit) ........19 A1 ................88 A5 ................89 A6 ................91...
  • Page 200 SiEBE04-507 L4 ..............113 L5 ..............115 indoor heat exchanger thermistor ....35, 36 P4 ..............109 indoor unit PCB abnormality ......... 88 U0 ..............117 input current control ..........42 U2 ..............119 input over current detection ......... 100 U4 ..............94 installation condition check ......... 123 UA ..............95 instruction ..............
  • Page 201 SiEBE04-507 signal receiving sign ..........34 signal transmission error ........94 P4 .................109 sound blanket ............170 partition plate ............168 specifications ............6 PCB ..............141, 176 starting operation control ........47 PI control ..............39 stop valve cover ..........159 piping diagrams ............184 SW1 ..............
  • Page 202 SiEBE04-507 Index...

  • Page 203: Drawings & Flow Charts

    SiEBE04-507 Drawings & Flow Charts insufficient gas ............ 117 insufficient gas control ........... 49 ARC433A ...............84 INTELLIGENT EYE ..........31 automatic air flow control ........25 INTELLIGENT EYE sensor PCB ......17 automatic operation ..........27 inverter features ............ 23 auto-swing ..............24 inverter POWERFUL operation ......
  • Page 204 SiEBE04-507 target discharge pipe temperature control .....48 thermistor or related abnormality (indoor unit) ..93 thermistor or related abnormality (outdoor unit) ...109 thermistor resistance check .........122 thermostat control ..........28 trial operation from remote controller ....180 turning speed pulse input on the outdoor unit PCB check ............125 wiring diagrams FTK(X)S20/25/35D2VMW(L) ......187...
  • Page 205 Daikin Europe N.V. is approved by LRQA for its Quality Daikin units comply with the European regulations that Management System in accordance with the ISO9001 guarantee the safety of the product. standard. ISO9001 pertains to quality assurance regarding design, development, manufacturing as well as to services related to the product.

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