Daikin D Series Service Manual
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Daikin D Series Service Manual

Daikin D Series Service Manual

Inverter pair wall mounted type
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Inverter Pair
Wall Mounted Type D-Series
E-Series
[Applied Models]
Non-Inverter Pair : Heat Pump
Inverter Pair : Cooling Only
Inverter Pair : Heat Pump
Si04 - 803

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  • Page 1 Si04 - 803 Inverter Pair Wall Mounted Type D-Series E-Series [Applied Models] Non-Inverter Pair : Heat Pump Inverter Pair : Cooling Only Inverter Pair : Heat Pump...
  • Page 2 Si04-803 Inverter Pair D-Series E-Series Cooling Only Indoor Unit <R-410A> <R-22> FTKS25DVM FTKD25DVM FTKD25DV2Z FTKS35DVM FTKD35DVM FTKD35DV2Z FTKS25EVMA FTKD25DVMA FTKS35EVMA FTKD35DVMA Outdoor Unit <R-410A> <R-22> RKS25DAVM RKD25DAVM RKD25DAV2Z RKS35DAVM RKD35DAVM RKD35DAV2Z RKS25EBVMA RKD25DAVMA RKS35EBVMA RKD35DAVMA Heat Pump Indoor Unit <R-410A> <R-22>...

  • Page 3: Table Of Contents

    Si04-803 1. Introduction .....................v 1.1 Safety Cautions ..................v 1.2 Used Icons ....................ix Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 R-410A Models..................2 1.2 R-22 Models .....................5 Part 2 Specifications ..............9 1. Specifications ..................10 1.1 Cooling Only...................10 1.2 Heat Pump .....................15 Part 3 Printed Circuit Board Connector Wiring Diagram ...
  • Page 4 Si04-803 3.13 Forced Operation Mode .................59 3.14 Additional Function.................59 Part 5 Operation Manual ............. 61 1. System Configuration................62 2. Instruction....................63 2.1 Safety Precautions .................63 2.2 Names of Parts..................65 2.3 Preparation Before Operation ..............68 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........71 2.5 Adjusting the Airflow Direction..............73 2.6 POWERFUL Operation ................75 2.7 OUTDOOR UNIT QUIET Operation............76...
  • Page 5 Si04-803 5. Check ....................130 5.1 How to Check ..................130 Part 7 Removal Procedure ............137 1. Indoor Unit...................138 1.1 Removal of Air Filter................138 1.2 Removal of Front Panel................140 1.3 Removal of Front Grille ................142 1.4 Removal of Horizontal Blades and Vertical Blades ......145 1.5 Removal of Electrical Box ..............148 1.6 Removal of PCB...................151 1.7 Removal of Drain Pan Unit ..............158...

  • Page 6: Introduction

    Si04-803 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 Introduction Si04-803 Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2m). Insufficient safety measures may cause a fall accident. In case of R410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R410A refrigerant.
  • Page 8 Si04-803 Introduction 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.
  • Page 9 Introduction Si04-803 Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug has dust or loose connection, it may cause an electrical shock or fire. Be sure to install the product correctly by using the provided standard For unitary type installation frame.

  • Page 10: Used Icons

    Si04-803 Introduction Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause the water to enter the room and wet the furniture and floor.
  • Page 11 Introduction Si04-803...

  • Page 12: Part 1 List Of Functions

    Si04-803 Part 1 List of Functions 1. List of Functions ..................2 1.1 R-410A Models..................2 1.2 R-22 Models .....................5 List of Functions...

  • Page 13: List Of Functions

    List of Functions Si04-803 1. List of Functions R-410A Models Category Functions Category Functions Basic Function Inverter (with Inverter Power Control) Health & Clean Air Purifying Filter — Operation Limit for Cooling (°CDB) Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter —...
  • Page 14 Si04-803 List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter — — Function Clean Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — –10 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 15 List of Functions Si04-803 Category Functions Category Functions Basic Inverter (with Inverter Power Control) — Health & Air Purifying Filter — Function Clean Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — –10 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...

  • Page 16: Models

    Si04-803 List of Functions R-22 Models Category Functions Category Functions Basic Inverter (with Inverter Power Health & Function Control) Clean Air Purifying Filter Operation Limit for Cooling (°C) Operation Limit for Heating (°C) — Photocatalytic Deodorizing Filter Air Purifying Filter with PAM Control Photocatalytic Deodorizing —...
  • Page 17 List of Functions Si04-803 Category Functions Category Functions Basic Inverter (with Inverter Power Health & Function Control) Clean Air Purifying Filter Operation Limit for Cooling (°C) –10 Operation Limit for Heating (°C) — Photocatalytic Deodorizing Filter Air Purifying Filter with PAM Control Photocatalytic Deodorizing —...
  • Page 18 Si04-803 List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Health & Function Control) Clean Air Purifying Filter Operation Limit for Cooling (°C) –10 Operation Limit for Heating (°C) — Photocatalytic Deodorizing Filter Air Purifying Filter with PAM Control Photocatalytic Deodorizing —...
  • Page 19 List of Functions Si04-803 List of Functions...

  • Page 20: Part 2 Specifications

    Si04-803 Part 2 Specifications 1. Specifications ..................10 1.1 Cooling Only...................10 1.2 Heat Pump .....................15 Specifications...

  • Page 21: Specifications

    Specifications Si04-803 1. Specifications Cooling Only 1.1.1 R-410A Models 50Hz 220-230-240V / 60Hz 220-230V Indoor Units FTKS25DVM FTKS35DVM Models Outdoor Units RKS25DAVM RKS35DAVM 2.5 (1.2~3.2) 3.5 (1.4~4.0) Capacity Btu/h 8,500 (4,050~10,900) 11,900 (4,750~13,650) Rated (Min.~Max.) kcal/h 2,150 (1,030~2,750) 3,010 (1,200~3,440) Moisture Removal Running Current (Rated) 4.0-3.9-3.7 / 4.0-3.9...
  • Page 22 Si04-803 Specifications 50Hz 220-230-240V / 60Hz 220-230V Indoor Units FTKS25EVMA FTKS35EVMA Models Outdoor Units RKS25EBVMA RKS35EBVMA 2.5 (1.2~3.0) 3.5 (1.2~3.8) Capacity Btu/h 8,500 (4,100~10,200) 11,900 (4,100~12,950) Rated (Min.~Max.) kcal/h 2,150 (1,030~2,580) 3,010 (1,030~3,260) Moisture Removal Running Current (Rated) 3.5-3.3-3.2 / 3.5-3.3 4.9-4.7-4.5 / 4.9-4.7 Power Consumption (Rated) 600 (300~800)
  • Page 23 Specifications Si04-803 1.1.2 R-22 Models 50Hz 220-230-240V / 60Hz 220-230V Indoor Units FTKD25DVM FTKD35DVM Models Outdoor Units RKD25DAVM RKD35DAVM 2.5 (1.2~3.2) 3.5 (1.4~4.0) Capacity Btu/h 8,500 (4,050~10,900) 11,900 (4,750~13,650) Rated (Min.~Max.) kcal/h 2,150 (1,030~2,750) 3,010 (1,200~3,440) Moisture Removal Running Current (Rated) 4.2-4.0-3.8 / 4.2-4.0 5.0-4.7-4.5 / 5.0-4.7 Power Consumption...
  • Page 24 Si04-803 Specifications 50Hz 220-230-240V / 60Hz 220-230V Indoor Units FTKD25DVMA FTKD35DVMA Models Outdoor Units RKD25DAVMA RKD35DAVMA 2.5 (1.3~3.0) 3.5 (1.4~3.8) Capacity Btu/h 8,500 (4,400~10,200) 11,900 (4,750~12,950) Rated (Min.~Max.) kcal/h 2,150 (1,100~2,580) 3,010 (1,200~3,260) Moisture Removal Running Current (Rated) 4.2-4.0-3.8 / 4.2-4.0 5.4-5.2-5.0 / 5.4-5.2 Power Consumption 725 (310~1,030)
  • Page 25 Specifications Si04-803 50Hz 220V Indoor Units FTKD25DV2Z FTKD35DV2Z Models Outdoor Units RKD25DAV2Z RKD35DAV2Z 2.5 (1.3~3.0) 3.5 (1.4~3.8) Capacity Btu/h 8,500 (4,400~10,200) 11,900 (4,800~13,000) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 3,010 (1,200~3,270) Moisture Removal Running Current (Rated) Power Consumption 730 (310~1,040) 1,140 (305~1,380) Rated (Min.~Max.) Power Factor 79.0...

  • Page 26: Heat Pump

    Si04-803 Specifications Heat Pump 1.2.1 R-410A Models 50Hz 220-230-240V / 60Hz 220-230V Indoor Units FTXS25EVMA FTXS35EVMA Models RXS25EBVMA RXS35EBVMA Outdoor Units Cooling Heating Cooling Heating 2.5 (1.2~3.0) 3.4 (1.2~4.5) 3.5 (1.2~3.8) 4.0 (1.2~5.0) Capacity Btu/h 8,500 (4,100~10,200) 11,600 (4,100~15,350) 11,900 (4,100~12,950) 13,600 (4,100~17,050) Rated (Min.~Max.) kcal/h...
  • Page 27 Specifications Si04-803 50Hz 220-230-240V Indoor Units FTYN25DV1A FTYN35DV1A Model RYN25DAV1A RYN35DAV1A Outdoor Units Cooling Heating Cooling Heating Capacity Btu/h 8,500 11,600 11,900 14,300 Rated kcal/h 2,150 2,920 3,010 3,610 Moisture Removal — — Running Current (Rated) 4.0-3.8-3.7 4.5-4.3-4.1 5.3-5.1-4.9 5.8-5.5-5.3 Power Consumption 1,110 1,225...
  • Page 28 Si04-803 Specifications 1.2.2 R-22 Models 50Hz 220-230-240V / 60Hz 220-230V Indoor Units FTXD25DVMA FTXD35DVMA Models RXD25DAVMA RXD35DAVMA Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.0) 3.5 (1.4~3.8) 4.2 (1.4~5.0) Capacity Btu/h 8,500 (4,400~10,200) 11,600 (4,400~13,650) 11,900 (4,750~12,950) 14,300 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,150 (1,110~2,580)
  • Page 29 Specifications Si04-803 50Hz 220V Indoor Units FTXD25DV2Z FTXD35DV2Z Models RXD25DAV2Z RXD35DAV2Z Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.0) 3.5 (1.4~3.8) 4.2 (1.4~5.0) Capacity Btu/h 8,500 (4,400~10,200) 11,600 (4,400~13,600) 11,900 (4,800~13,000) 14,300 (4,800~17,100) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,920 (1,120~3,440) 3,010 (1,200~3,270) 3,610 (1,200~4,300)

  • Page 30: Part 3 Printed Circuit Board Connector Wiring Diagram

    Si04-803 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........20 1.1 Indoor Unit....................20 1.2 Outdoor Unit ...................26 Printed Circuit Board Connector Wiring Diagram...

  • Page 31: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram Si04-803 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit 1.1.1 FTK(X)D 25/35 D Connectors PCB(1)(Control PCB) Connector for AC fan motor Connector for swing motor (horizontal blades) Connector for AC fan motor (Hall IC) Connector for centralized control (HA)
  • Page 32 Si04-803 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB LED A (R4779) PCB(2): Signal Receiver PCB PCB(3): Display PCB LED1 LED2 LED3 RTH1 (R4289) (R4290) PCB(4): INTELLIGENT EYE sensor PCB (R4547) Printed Circuit Board Connector Wiring Diagram...
  • Page 33 Printed Circuit Board Connector Wiring Diagram Si04-803 1.1.2 FTKS 25/35 D, FTK(X)S 25/35 E Connectors PCB(1)(Control PCB) Connector for fan motor Connector for swing motor (horizontal blades) Connector for centralized control (HA) Connector for display PCB Connector for signal receiver PCB Connector for heat exchanger thermistor Connector for INTELLIGENT EYE sensor PCB PCB(2)(Signal Receiver PCB)
  • Page 34 Si04-803 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 35 Printed Circuit Board Connector Wiring Diagram Si04-803 1.1.3 FTYN 25/35 D Connectors PCB(1)(Control PCB) Connector for fan DC motor Connector for swing motor (horizontal blades) Connector for centralized control (HA) Connector for display PCB Connector for signal receiver PCB Connector for heat exchanger thermistor PCB(2)(Signal Receiver PCB) Connector for control PCB PCB(3)(Display PCB)
  • Page 36 Si04-803 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB LED A (R4828) PCB(2): Signal Receiver PCB PCB(3): Display PCB LED1 LED2 RTH1 (R5183) (R4827) Printed Circuit Board Connector Wiring Diagram...

  • Page 37: Outdoor Unit

    Printed Circuit Board Connector Wiring Diagram Si04-803 Outdoor Unit Connectors PCB(1)(Filter PCB) Connector for control PCB PCB(2)(Control PCB) Connector for filter PCB Connector for electronic expansion valve coil Connector for compressor motor Connector for overload protector Connector for fan motor Connector for four way valve coil Connector for thermistors (outdoor air, heat exchanger, discharge pipe)
  • Page 38 Si04-803 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) (R4780) Printed Circuit Board Connector Wiring Diagram...
  • Page 39 Printed Circuit Board Connector Wiring Diagram Si04-803 Printed Circuit Board Connector Wiring Diagram...

  • Page 40: Part 4 Function And Control

    Si04-803 Part 4 Function and Control 1. Main Functions..................30 1.1 Frequency Principle................30 1.2 Airflow Direction Control.................32 1.3 Fan Speed Control for Indoor Units............33 1.4 Programme Dry Function ...............34 1.5 Automatic Operation................35 1.6 Thermostat Control.................36 1.7 NIGHT SET Mode ..................37 1.8 ECONO Mode ..................38 1.9 MOLD PROOF Operation ..............39 1.10 INTELLIGENT EYE ................40 1.11 Inverter POWERFUL Operation .............42...

  • Page 41: Main Functions

    Main Functions Si04-803 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 42 Si04-803 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 43: Airflow Direction Control

    Main Functions Si04-803 Airflow 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 44: Fan Speed Control For Indoor Units

    Si04-803 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 rotation speed control, or phase control and Hall IC control. For more information about Hall IC, refer to trouble shooting for fan motor on page 99.

  • Page 45: Programme Dry Function

    Main Functions Si04-803 Programme Dry Function Programme dry function removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow 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 46: Automatic Operation

    Si04-803 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 47: Thermostat Control

    Main Functions Si04-803 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 48: Night Set Mode

    Si04-803 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 49: Econo Mode

    Main Functions Si04-803 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 50: Mold Proof Operation

    Si04-803 Main Functions MOLD PROOF Operation MOLD PROOF operation is a function which reduces the spread of mold by using Fan mode to lower the humidity inside the indoor unit. Outline MOLD PROOF operation starts when the following conditions are met. 1.

  • Page 51: Intelligent Eye

    Main Functions Si04-803 1.10 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 52 Si04-803 Main Functions 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 53: Inverter Powerful Operation

    Main Functions Si04-803 1.11 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 20 minutes.

  • Page 54: Other Functions

    Si04-803 Main Functions 1.12 Other Functions 1.12.1 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 airflow is stopped or is made very weak thereby carrying out comfortable heating of the room.

  • Page 55: Function Of Thermistor

    Function of Thermistor Si04-803 Function of Thermistor Heat Pump Model Four way valve Compressor (R3305) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. The system sets a target discharge temperature according to the outdoor and indoor heat Exchanger exchanger temperature, and controls the electronic expansion valve opening so that the Thermistor...

  • Page 56: Cooling Only Model

    Si04-803 Function of Thermistor Cooling Only Model Compressor (R2828) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. The system sets a target discharge temperature according to the outdoor and indoor heat Exchanger exchanger temperature, and controls the electronic expansion valve opening so that the Thermistor target discharge temperature can be obtained.

  • Page 57: Control Specification

    Control Specification Si04-803 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 58: Frequency Control

    Si04-803 Control Specification 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 59 Control Specification Si04-803 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 60: Controls At Mode Changing / Start-Up

    Si04-803 Control Specification 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 10°C, inverter in open phase operation starts.

  • Page 61: 3-Minute Standby

    Control Specification Si04-803 3.3.4 3-minute Standby Prohibit to turn ON the compressor for 3 minutes after turning it off. (Except when defrosting. (Only for Heat Pump Model).) 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows.

  • Page 62: Input Current Control

    Si04-803 Control Specification 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 63: Freeze-Up Protection Control

    Control Specification Si04-803 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 64: Fan Control

    Si04-803 Control Specification Fan Control Outline Fan control is carried out according to the following conditions. 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 65: Defrost Control

    Control Specification Si04-803 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 66: Electronic Expansion Valve Control

    Si04-803 Control Specification 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 67: Pressure Equalization Control

    Control Specification Si04-803 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 68: Target Discharge Pipe Temperature Control

    Si04-803 Control Specification 3.11.7 Control When Frequency is Changed When the target discharge pipe temperature control is active, if the target frequency is changed for a specified value in a certain time period, cancel the target discharge pipe temperature control and change the target opening of the electronic expansion valve according to the shift. 3.11.8 Target Discharge Pipe Temperature Control Obtain the target discharge pipe temperature from the indoor and outdoor heat exchanger...

  • Page 69: Malfunctions

    Control Specification Si04-803 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction may occur in the thermistor. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Outdoor air thermistor 3.12.2 Detection of Overload Over Current Outline In order to protect the inverter, detect an excessive output current, and for protecting...

  • Page 70: Forced Operation Mode

    Si04-803 Control Specification 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 71 Control Specification Si04-803 Function and Control...

  • Page 72: Part 5 Operation Manual

    Si04-803 Part 5 Operation Manual 1. System Configuration................62 2. Instruction....................63 2.1 Safety Precautions .................63 2.2 Names of Parts..................65 2.3 Preparation Before Operation ..............68 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........71 2.5 Adjusting the Airflow Direction..............73 2.6 POWERFUL Operation ................75 2.7 OUTDOOR UNIT QUIET Operation............76 2.8 ECONO Operation .................77...

  • Page 73: System Configuration

    System Configuration Si04-803 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 74: 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 75 Instruction Si04-803 • Do not block air inlets nor outlets. Impaired air flow may result in insufficient performance or trouble. • 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. •...

  • Page 76: Names Of Parts

    Si04-803 Instruction Names of Parts Names of parts Indoor Unit ON/OFF Operation Manual...
  • Page 77 Instruction Si04-803 Outdoor Unit Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: (page 10.) • Push this switch once to start operation. 2. Photocatalytic deodorizing filter or Push once again to stop it. Air-purifying filter: • The operation mode refers to the following •...

  • Page 78: Remote Controller

    Si04-803 Instruction Remote Controller ECONO ON/OFF TEMP POWERFUL MODE SWING QUIET MOLD PROOF SENSOR CANCEL TIMER <ARC433B46, B47> 1. Signal transmitter: 8. QUIET button: OUTDOOR UNIT QUIET • It sends signals to the indoor unit. operation (page 15.) 2. Display: 9.

  • Page 79: Preparation Before Operation

    Instruction Si04-803 Preparation Before Operation Preparation Before Operation To set the batteries Position + and – correctly! 1. Press with a finger and slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION About batteries •...

  • Page 80: To Operate The Remote Controller

    Si04-803 Instruction Preparation Before Operation To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote control- ler, such as a curtain, the unit will not operate. •...

  • Page 81: To Set The Clock

    Instruction Si04-803 To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. ECONO ON/OFF Holding down “ ” or “ ” button rap- TEMP POWERFUL idly increases or decreases the time dis- play.

  • Page 82: Auto · Dry · Cool · Heat · Fan Operation

    Si04-803 Instruction AUTO · DRY · COOL · HEAT · FAN Operation 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 83 Instruction Si04-803 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 84: Adjusting The Airflow Direction

    Si04-803 Instruction Adjusting the Airflow Direction Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. To adjust the horizontal blades (flaps) 1. Press “SWING button”. • “ ” is displayed on the LCD and the flaps will begin to swing.
  • Page 85 Instruction Si04-803 To adjust the vertical blades (louvres) Hold the knob and move the louvres. (You will find a knob on the left-side and the right-side blades.) • When the unit is installed in the corner of a room, the direction of the louvers should be facing away from the wall.

  • Page 86: Powerful Operation

    Si04-803 Instruction POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity . To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used ECONO...

  • Page 87: Outdoor Unit Quiet Operation

    Instruction Si04-803 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is conve- nient during night. To start OUTDOOR UNIT QUIET operation 1.

  • Page 88: Econo Operation

    Si04-803 Instruction ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by lowering the maximum power con- sumption value. To start ECONO operation 1. Press “ECONO button” . • “ ” is displayed on the LCD. To cancel ECONO opera- tion 2.

  • Page 89: Mold Proof Operation

    Instruction Si04-803 MOLD PROOF Operation MOLD PROOF Operation MOLD PROOF operation is a function which reduces the spread of mold by using Fan mode to lower the humidity inside the indoor unit. To set MOLD PROOF operation 1. Press and hold the MOLD PROOF button for two seconds.

  • Page 90: Intelligent Eye Operation

    Si04-803 Instruction 2.10 INTELLIGENT EYE Operation 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...
  • Page 91 Instruction Si04-803 “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 92: Timer Operation

    Si04-803 Instruction 2.11 TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER opera- tion •...
  • Page 93 Instruction Si04-803 To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time (page 9.). 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.

  • Page 94: Care And Cleaning

    Si04-803 Instruction 2.12 Care and Cleaning CARE 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.

  • Page 95: Air Filter

    Instruction Si04-803 Filters 1. Open the front grille. (page 22.) 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 air-purifying filter, photocatalytic deodorizing filter.

  • Page 96: Before A Long Idle Period

    Si04-803 Instruction 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. • The air purifying filter and Photocatalytic deodorizing filter cannot be reused, even if washed. •...

  • Page 97: Troubleshooting

    Instruction Si04-803 2.13 Troubleshooting 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. • This is to protect the air conditioner. •...
  • Page 98 Si04-803 Instruction Check again. Please check again before calling a repair person. Case Check The air conditioner does not • Hasn’t a breaker turned OFF or a fuse blown? operate. • Isn’t it a power failure? (OPERATION lamp is off) •...
  • Page 99 Instruction Si04-803 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 100: Part 6 Service Diagnosis

    Si04-803 Part 6 Service Diagnosis 1. Caution for Diagnosis................90 2. Problem Symptoms and Measures ............91 3. Service Check Function ................92 4. Troubleshooting ..................95 4.1 Error Codes and Description ..............95 4.2 Indoor Unit PCB Abnormality ..............96 4.3 Freeze-up Protection Control or High Pressure Control......97 4.4 Fan Motor or Related Abnormality ............99 4.5 Thermistor or Related Abnormality (Indoor Unit)........102 4.6 Signal Transmission Error (between Indoor and Outdoor Unit) ...103...

  • Page 101: Caution For Diagnosis

    Caution for Diagnosis Si04-803 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 102: Problem Symptoms And Measures

    Si04-803 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 103: Service Check Function

    Service Check Function Si04-803 Service Check Function In the ARC433 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 104 Si04-803 Service Check Function Check Method 2 1. Enter the diagnosis mode. Press the 3 buttons (TEMP▲,TEMP▼, MODE) simultaneously. (R4272) The digit of the number of tens blinks. ★ Try again from the start when the digit does not blink. (R4273) 2.
  • Page 105 Service Check Function Si04-803 5. Press the TEMP button. Press TEMP▲ or TEMP▼ and change the digit until you hear the sound of “beep”. (R4277) 6. Diagnose by the sound. ★ “pi” : The both numbers of tens and units do not accord with the error code. ★...

  • Page 106: Troubleshooting

    Unspecified voltage (between indoor and outdoor unit) Indoor Indoor unit PCB abnormality Unit Freeze-up protection control or high pressure control AC motor (FTK(X)D Series) Fan motor or related abnormality DC motor (FTK(X)S Series) Heat exchanger temperature thermistor abnormality Room temperature thermistor abnormality...

  • Page 107: Indoor Unit Pcb Abnormality

    Troubleshooting Si04-803 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 108: Freeze-Up Protection Control Or High Pressure Control

    Si04-803 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 109 Troubleshooting Si04-803 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Check the air passage. Refer to P.132 Is there any short-circuit? Provide sufficient air passage. Check the intake air filter. Clean the air filter.

  • Page 110: Fan Motor Or Related Abnormality

    Si04-803 Troubleshooting Fan Motor or Related Abnormality 4.4.1 AC Motor 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 does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
  • Page 111 Troubleshooting Si04-803 4.4.2 DC Motor 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 does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
  • Page 112 Si04-803 Troubleshooting 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 Refer to P.130 and rotate fan by hand. Does fan rotate Replace fan motor. smoothly? Turn power ON and operate fan.

  • Page 113: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting Si04-803 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 114: Signal Transmission Error (Between Indoor And Outdoor Unit)

    Si04-803 Troubleshooting Signal Transmission Error (between Indoor and Outdoor Unit) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of the data is abnormal.
  • Page 115 Troubleshooting Si04-803 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.10 Check the indoor unit-outdoor unit Refer to P.134 connection wires. Is there any wiring error? Correct the indoor unit-outdoor unit connection wires.

  • Page 116: Unspecified Voltage (Between Indoor And Outdoor Units)

    Si04-803 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 indoor / outdoor transmission signal. Malfunction Detection Malfunction The pair type and multi type are interconnected. Decision Conditions Supposed...

  • Page 117: Outdoor Unit Pcb Abnormality

    Troubleshooting Si04-803 Outdoor Unit PCB Abnormality Remote Controller Display Method of The system follows the microprocessor program to make sure it runs normally. The system checks to see if the zero-cross signal comes in properly. Malfunction Detection Malfunction The microprocessor program runs out of control. The zero-cross signal is not detected.

  • Page 118: Ol Activation (Compressor Overload)

    Si04-803 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. 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 119: Compressor Lock

    Troubleshooting Si04-803 4.10 Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection Malfunction The system judges the compressor lock, and stops due to over current. The system judges the compressor lock, and cannot operation with position detection within Decision 15 seconds after start up.

  • Page 120: Dc Fan Lock

    Si04-803 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. The system will be shut down if the error occurs 16 times.

  • Page 121: Input Over Current Detection

    Troubleshooting Si04-803 4.12 Input Over Current Detection Remote Controller Display Method of An input over-current is detected by checking the input current value with the compressor Malfunction running. Detection Malfunction The following current with the compressor running continues for 2.5 seconds. Cooling / Heating: Above 12A Decision Conditions...

  • Page 122: Four Way Valve Abnormality

    Si04-803 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 123 Troubleshooting Si04-803 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.05 Refer to P.131 Four way valve coil Correct. disconnected (loose)? Check No.06 Refer to P.132 Harness out of connector? Reconnect.

  • Page 124: Discharge Pipe Temperature Control

    Si04-803 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 system will be shut down.

  • Page 125: High Pressure Control In Cooling

    Troubleshooting Si04-803 4.15 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the Malfunction temperature being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction Activated when the temperature being sensed by the heat exchanger thermistor rises above 65°C.
  • Page 126 Si04-803 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.130 Check the installation space. Check No.06 Check No. 07 Abnormal Refer to P.132 Change the air outlet grille Check the installation position.

  • Page 127: Compressor System Sensor Abnormality

    Troubleshooting Si04-803 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 128: Position Sensor Abnormality

    Si04-803 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 is sent.

  • Page 129: Dc Voltage / Current Sensor Abnormality

    Troubleshooting Si04-803 4.18 DC Voltage / Current Sensor Abnormality Remote Controller Display Method of Detecting abnormality of the DC sensor by the running frequency of compressor and by the Malfunction input current multiplied DC voltage and current. Detection Malfunction The compressor running frequency is below 52 Hz. (The input current is also below 0.5 A.) Decision If this error repeats 4 times, the system will be shut down.

  • Page 130: Thermistor Or Related Abnormality (Outdoor Unit)

    Si04-803 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 131 Troubleshooting Si04-803 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Turn on the power again. Refer to P.132 Error displayed Reconnect. again on remote controller? Connector or thermistor Reconnect.

  • Page 132: Electrical Box Temperature Rise

    Si04-803 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 temperature drops below 70°C.
  • Page 133 Troubleshooting Si04-803 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 WARNING Turn off the power and turn it on Refer to P.132 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 134: Radiation Fin Temperature Rise

    Si04-803 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. If a radiation fin temperature rise takes place 4 times successively, the system will be shut Decision down.
  • Page 135 Troubleshooting Si04-803 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Turn off the power and turn it on Refer to P.132 again to get the system started. Check No.07 Refer to P.133 Error displayed again?

  • Page 136: Output Over Current Detection

    Si04-803 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. A speed error occurs while the compressor is running.
  • Page 137 Troubleshooting Si04-803 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.133 reconnected for part replacement, for example, and the system is interrupted by an output over-current, check the wires again.

  • Page 138: Insufficient Gas

    Si04-803 Troubleshooting 4.23 Insufficient Gas Remote Controller Display Method of Gas shortage detection I: Malfunction Gas shortage is detected by checking the input current value and the compressor running frequency. If the gas is short, the input current is smaller than the normal value. Detection Gas shortage detection II: Gas shortage is detected by checking the discharge temperature and the opening of the...
  • Page 139 Troubleshooting Si04-803 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.130 Any thermistor Replace in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor Check No.06 * Outdoor air thermistor...

  • Page 140: Over-Voltage Detection

    Si04-803 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 (The voltage is over 400V). Decision The system will be shut down if the error occurs 255 times.

  • Page 141: Check

    Check Si04-803 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 142: Four Way Valve Performance Check

    Si04-803 Check 5.1.3 Four Way Valve Performance Check Check No.05 Turn off the power and turn it on again. ∗ Four way valve coil Start the heating-mode run. Cooling / dry : No continuity Heating : Continuity voltage at DC 220- Replace the outdoor unit 240 V with compressor PCB.

  • Page 143: Thermistor Resistance Check

    Check Si04-803 5.1.4 Thermistor Resistance Check Check No.06 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.

  • Page 144: Installation Condition Check

    Si04-803 Check 5.1.5 Installation Condition Check Check No.07 Installation condition check Check the Abnormal allowable dimensions Change the position of the air of the air suction and discharge grille or the discharge area. installation location. Normal Does the discharged air from other outdoor unit cause an Change the position of the air increase of the suction...

  • Page 145: Outdoor Unit Fan System Check

    Check Si04-803 5.1.7 Outdoor Unit Fan System Check Check No.09 DC motor Check the outdoor unit fan system. Fan motor lead wire connector Outdoor unit fan running? Reconnect. disconnected? Outdoor unit fan system Go to Check No. 15. functioning. (R7159) 5.1.8 Power Supply Waveforms Check Check No.10...

  • Page 146: Power Transistor Check

    Si04-803 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 147: Hall Ic Check

    Check Si04-803 5.1.12 Hall IC Check Check No.16 1. Check the connector connection. 2. With the power ON, operation OFF, and the connector connected, check the following. ∗ Output voltage of about 5 V between pins 1 and 3. ∗ Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.

  • Page 148: Part 7 Removal Procedure

    Si04-803 Part 7 Removal Procedure 1. Indoor Unit...................138 1.1 Removal of Air Filter................138 1.2 Removal of Front Panel................140 1.3 Removal of Front Grille ................142 1.4 Removal of Horizontal Blades and Vertical Blades ......145 1.5 Removal of Electrical Box ..............148 1.6 Removal of PCB...................151 1.7 Removal of Drain Pan Unit ..............158 1.8 Removal of Fan Motor................162 1.9 Removal of Heat Exchanger ..............164...

  • Page 149: Indoor Unit

    Indoor Unit Si04-803 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 150 Si04-803 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 Air filter purifying filter is filter is not marked for attached to the back of difference between the right the air filter.

  • Page 151: Removal Of Front Panel

    Indoor Unit Si04-803 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 152 Si04-803 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 153: Removal Of Front Grille

    Indoor Unit Si04-803 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 154 Si04-803 Indoor Unit Step Procedure Points Remove the screw covers (one each at the right and left). (R4321) 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 155 Indoor Unit Si04-803 Step Procedure Points Put your fingers into the front grille and lift the grille up to unfasten the center hook. (R4325) Unfasten the right hook also by putting your fingers into the grille and lifting it. (R4326) Remove the front grille Caution on Mounting by tilting the upper part...

  • Page 156: Removal Of Horizontal Blades And Vertical Blades

    Si04-803 Indoor Unit Removal of Horizontal Blades 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 157 Indoor Unit Si04-803 Step Procedure Points 2. Removing the horizontal blade (small) Remove the horizontal blade (small) while bending the fixed part at the center slightly. Unfasten the left side. Unfasten the key type fixing shaft at the right side. Removal Procedure...
  • Page 158 Si04-803 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. Unfasten the hooks at the upper 2 positions. Remove the vertical Six vertical blades are blade toward yourself.

  • Page 159: Removal Of Electrical Box

    Indoor Unit Si04-803 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 connections of wire Remove the front grille harnesses.
  • Page 160 Si04-803 Indoor Unit Step Procedure Points Remove the connector FTK(X)D series only. of the fan motor [S7]. [S7] Remove the drip proof Put any excess wires behind plate by removing the the power supply lead wire. screw. Replace the heat exchanger thermistor.
  • Page 161 Indoor Unit Si04-803 Step Procedure Points Remove the screw of the electrical box. Release the hook at the upper far side by pressing it from above and pulling the box toward yourself. Lift up the electrical box There is a hook also at the and pull it toward lower part of the back.

  • Page 162: Removal Of Pcb

    Si04-803 Indoor Unit Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the shelter The figure shows the Preparation appearance of the Remove the electrical box electrical box.
  • Page 163 Indoor Unit Si04-803 Step Procedure Points 3. Removing the terminal board Dismount the terminal board by removing the screw. 4. Removing the signal receiver unit Remove the signal receiver unit by unfastening the hooks (one each at the right and left). Remove the electrical box (cover) by unfastening the hooks...
  • Page 164 Si04-803 Indoor Unit Step Procedure Points Remove the electrical box by sliding it to the left. Disconnect the wire harness. 5. Removing the signal receiver PCB Remove the signal receiver PCB by opening the hooks at 3 positions. Disconnect the connector from the signal receiver PCB.
  • Page 165 Indoor Unit Si04-803 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 166 Si04-803 Indoor Unit Step Procedure Points 7. Removing the display The figure shows the connection of wire harness for the display PCB. Remove the display PCB by unfastening the 2 hooks. Disconnect the connector from the display PCB. 8. Removing the control PCB Dismount the control PCB by removing the 2 hooks.
  • Page 167 PCB. When component parts. replacing the PCB, use the specific solder and soldering iron. [S1] Varistor In case of FTK(X)D series. (w/cap) [S1] To AC fan motor Fuse [S6] To swing motor (holder [S7] To AC fan motor (Hall IC)
  • Page 168 Si04-803 Indoor Unit Step Procedure Points In case of FTK(X)S series. Varistor (w/cap) [S1] To DC fan motor [S6] To swing motor [S21] connector [S1] [S26] To display PCB [S28] To signal receiver PCB [S32] To heat exchanger Fuse thermistor (holder type [S35] To INTELLIGENT EYE w/cap)

  • Page 169: Removal Of Drain Pan Unit

    Indoor Unit Si04-803 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 170 Si04-803 Indoor Unit 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. 2. Removing the swing motor Remove the screw of the swing motor.
  • Page 171 Indoor Unit Si04-803 Step Procedure Points 3. Removing the crank assembly Remove the screw of the crank assembly. Remove the crank assembly by unfastening the hook. The figure shows the position of the hook when the crank assembly has been removed.
  • Page 172 Si04-803 Indoor Unit Step Procedure Points Remove the drain cap located at the left side of the drain pan unit. Insert the drain hose to the left side. Press the removed Use a 4mm Allen wrench. drain plug into the right side with an Allen Caution wrench (4mm).

  • Page 173: Removal Of Fan Motor

    Indoor Unit Si04-803 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 174 Si04-803 Indoor Unit Step Procedure Points Unfasten the hook (a) of the fan motor fixing plate with your thumb. Unfasten the hook (c). Remove the fan motor. Removal Procedure...

  • Page 175: Removal Of Heat Exchanger

    Indoor Unit Si04-803 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 176 Si04-803 Indoor Unit 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 by about 10-20 degrees.
  • Page 177 Indoor Unit Si04-803 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. When the left side is lifted, the hook at the right side comes off position.

  • Page 178: Removal Of Fan Rotor

    Si04-803 Indoor Unit 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 plate Remove the heat exchanger according to the “Removal of Heat Exchanger.”...
  • Page 179 Indoor Unit Si04-803 Step Procedure Points Unfasten the hook (a) of the fan motor fixing plate with your thumb and unfasten the hook (b). The fan motor fixing plate can be removed from the unit when the hook (c) is unfastened. 2.
  • Page 180 Si04-803 Indoor Unit 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. Press the rubber-made bearing with force from outside.

  • Page 181: Outdoor Unit

    Outdoor Unit Si04-803 2. Outdoor Unit Removal of Panels Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Features Handle (R7186) Take care not to cut your finger by the fins of the heat exchanger.
  • Page 182 Si04-803 Outdoor Unit Step Procedure Points 2. Remove the panels. Top panel Loosen the 2 screws (right, left) and lift the panel. (R7190) Remove the drip proof Drip proof plate plate. (R7191) Loosen the 4 screws of the discharge grille. (R7192) The discharge grille has 4 hooks.
  • Page 183 Outdoor Unit Si04-803 Step Procedure Points Loosen the 8 screws of front panel. Front panel (R7194) 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 (R7195) Removal Procedure...
  • Page 184 Si04-803 Outdoor Unit Step Procedure Points 3. Remove the fan motor. The screw has clockwise winding. Unscrew the washer- fitted nut (M10) of the propeller fan with a spanner. Propeller fan (R7196) Remove the propeller Align mark of the fan. propeller fan with D-cut section of the motor shaft when reassembling.
  • Page 185 Outdoor Unit Si04-803 Step Procedure Points Disconnect the fan motor connector [S70]. (R7199) The illustration shows Fan motor arrangement of the fan lead wire motor lead wire. (R7200) Loosen the fixing hooks Put the lead wire through the and release the lead back of the motor when wire.
  • Page 186 Si04-803 Outdoor Unit Step Procedure Points Loosen the screw to remove the fan motor fixing frame. Fan motor fixing frame (R7204) (R7205) When reassembling, fit the lower hook into the bottom frame. (R7206) Removal Procedure...
  • Page 187 Outdoor Unit Si04-803 Step Procedure Points 4. Remove the right side panel. Loosen the 2 screws on the rear side. (R7207) Unhook the outdoor air Outdoor air thermistor thermistor. (R7208) Lift up the guard net to Guard net remove. (R7209) Removal Procedure...
  • Page 188 Si04-803 Outdoor Unit Step Procedure Points Loosen the 4 screws on the right side. Right side panel (R7210) Loosen the screw and lift the connection port to remove. (R7211) Removal Procedure...
  • Page 189 Outdoor Unit Si04-803 Step Procedure Points When reassembling, make sure to fit the hook. (R7212) Lift up the right side panel to remove. Hook (R7213) Removal Procedure...

  • Page 190: Removal Of Electrical Box

    Si04-803 Outdoor Unit Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the top panel. Disconnect the connector for fan motor. 1. Remove the electrical box.
  • Page 191 Outdoor Unit Si04-803 Step Procedure Points Disconnect the The positions of connectors connector for overload on PCB are different protector [S40]. according to the models. (R7217) Disconnect the connector for electronic expansion valve coil [S20]. (R7218) Disconnect the connector for four way valve coil [S80].
  • Page 192 Si04-803 Outdoor Unit Step Procedure Points Release the discharge Pay attention so as not to pipe thermistor. lose the clip for thermistor. Discharge pipe thermistor (R7220) Cut the clamp. (R7221) Pull out the heat Pay attention so as not to exchanger thermistor.
  • Page 193 Outdoor Unit Si04-803 Step Procedure Points Lift and remove the Electrical Box electrical box. (R7223) Removal Procedure...

  • Page 194: Removal Of Reactor And Partition Plate

    Si04-803 Outdoor Unit Removal of Reactor Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. Reactor Remove the electrical box. 1. Remove the reactor. Loosen the screw.
  • Page 195 Outdoor Unit Si04-803 Step Procedure Points The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. (R7227) When reassembling, fit the lower hook into the bottom frame. Hook (R7228) Removal Procedure...

  • Page 196: Removal Of Sound Blanket

    Si04-803 Outdoor Unit Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. Remove the electrical box. 1. Remove the sound blanket.
  • Page 197 Outdoor Unit Si04-803 Step Procedure Points Pull the sound blanket Since the piping ports on the (inner) out. sound blanket are torn easily, remove the blanket carefully. (R7232) Removal Procedure...

  • Page 198: Removal Of Four Way Valve

    Si04-803 Outdoor Unit Removal of Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the peripheries. Remove the electronic expansion valve coil. (R7233) Terminal cover Remove the...
  • Page 199 Outdoor Unit Si04-803 Step Procedure Points Loosen the screw of the four way valve coil. Caution Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas welding rod. Caution From the viewpoint of global environment protection, do not discharge the refrigerant gas in the atmosphere.
  • Page 200 Si04-803 Outdoor Unit Step Procedure Points Provide a protective sheet or Warning a steel plate so that the If refrigerant gas leaks brazing flame cannot during the job, influence peripheries. ventilate the room. Be careful so as not to break (Bear in mind that if the pipes by pressing it the refrigerant gas is...

  • Page 201: Removal Of Compressor

    Outdoor Unit Si04-803 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 202 Si04-803 Outdoor Unit Step Procedure Points Heat up the brazed part of the suction side and disconnect. (R7253) Lift the compressor up and remove it. (R7254) Removal Procedure...

  • Page 203: Removal Of Pcb

    Outdoor Unit Si04-803 Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the PCB. You can remove the PCB when you disconnect the Feature of the PCB read wires on the terminal board without removing the...
  • Page 204 Si04-803 Outdoor Unit Step Procedure Points Loosen the 4 screws. The positions of screws are different according to the models. Screws (R7258) Undo the 3 hooks on the upper side. (R7259) Lift and pull out the PCB. Removal Procedure...
  • Page 205 Outdoor Unit Si04-803 Step Procedure Points Feature of the PCB See page 27 for detail. Glass fuse S70: fan motor 3.15 A S80: four way valve S90: thermistor (outdoor air, heat exchanger, discharge pipe) LED A (R7260) Removal Procedure...
  • Page 206 Si04-803 Part 8 Others 1. Others ....................196 1.1 Test Run from the Remote Controller ..........196 1.2 Jumper Settings ...................197 1.3 Application of Silicon Grease to a Power Transistor and a Diode Bridge..................198 Others...

  • Page 207: Part 8 Others

    Others Si04-803 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 208: Jumper Settings

    Si04-803 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 209: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    Others Si04-803 Application of Silicon Grease to a Power Transistor Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board of an outdoor unit is replaced, it is required that silicon grease (*1) is certainly applied to the heat radiation part (the contact point to the heat radiation fin) of the power transistor and diode bridge.

  • Page 210: Part 9 Appendix

    Si04-803 Part 9 Appendix 1. Piping Diagrams..................200 1.1 Indoor Units ..................200 1.2 Outdoor Units ..................202 2. Wiring Diagrams..................205 2.1 Indoor Units ..................205 2.2 Outdoor Units ..................207 Appendix...

  • Page 211: Piping Diagrams

    Piping Diagrams Si04-803 Piping Diagrams Indoor Units FTKS25/35DVM, FTKS25/35EVMA FTKD25DVM, FTKD25DVMA, FTKD25DV2Z INDOOR UNIT INDOOR UNIT MAFFLER ASSY HEAT EXCHANGER MAFFLER ASSY 6.4CuT HEAT EXCHANGER 7.0CuT 6.4CuT 6.4CuT THERMISTOR 6.4CuT THERMISTOR ON HEAT EXCH. 6.4CuT ON HEAT EXCH. 6.4CuT 6.4CuT CROSS FLOW FAN FIELD PIPING CROSS FLOW FAN...
  • Page 212 Si04-803 Piping Diagrams FTXD35DVMA, FTXD35DV2Z FTXS25/35EVMA, FTYN25/35DV1A INDOOR UNIT INDOOR UNIT MAFFLER ASSY HEAT EXCHANGER MAFFLER ASSY HEAT EXCHANGER 6.4CuT 7.0CuT 6.4CuT 6.4CuT THERMISTOR 6.4CuT ON HEAT EXCH. THERMISTOR 6.4CuT ON HEAT EXCH. 6.4CuT 6.4CuT CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) CROSS FLOW FAN FIELD PIPING...

  • Page 213: Outdoor Units

    Piping Diagrams Si04-803 Outdoor Units 1.2.1 Cooling Only RKS25DAVM OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.0CuT 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 ( 6.4CuT )
  • Page 214 Si04-803 Piping Diagrams RKD25DAVM, RKD25DAVMA, RKD25DAV2Z OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.9CuT 7.9CuT HEAT EXCHANGER THERMISTOR MOTOR OPERATED VALVE 7.9CuT 6.4CuT 6.4CuT FILTER MUFFLER WITH FILTER PROPELLER FAN MUFFLER WITH FILTER FIELD PIPING ( 6.4CuT ) LIQUID STOP 9.5CuT VALVE DISCHARGE PIPE...
  • Page 215 Piping Diagrams Si04-803 1.2.2 Heat Pump RXS25/35EBVMA, RYN35DAV1A OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER 7.0CuT THERMISTOR 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 4.8CuT 6.4CuT 6.4CuT 4.8CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY FIELD PIPING VALVE ( 6.4CuT )
  • Page 216 Si04-803 Piping Diagrams RXD25DAVMA, RXD25DAV2Z OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.9CuT 7.9CuT HEAT EXCHANGER THERMISTOR MOTOR OPERATED VALVE 7.9CuT 6.4CuT 6.4CuT MUFFLER FILTER WITH FILTER PROPELLER FAN MUFFLER 9.5CuT WITH FILTER FOUR WAY VALVE FIELD PIPING ON:HEATING (6.4CuT) LIQUID STOP VALVE MUFFLER...

  • Page 217: Wiring Diagrams

    Wiring Diagrams Si04-803 2. Wiring Diagrams Indoor Units FTKS25/35DVM, FTK(X)S25/35EVMA FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A LED1 OUTDOOR LED2 CAUTION LED3 TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
  • Page 218 Si04-803 Wiring Diagrams FTYN25/35DV1A FIELD WIRING. PCB3 PCB1 RECTIFIER LED1 3.15A OUTDOOR LED2 CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN. t° : FRAME GROUND : FUSE H1P~H2P : PILOT LAMP : FAN MOTOR...

  • Page 219: Outdoor Units

    Wiring Diagrams Si04-803 Outdoor Units RKS25/35DAVM, RK(X)S25/35EBVMA, RYN25/35DAV1A R12T t ° C100 FIELD WIRING. indoor PCB1 MRM20 IPM1 MRM10 3.15A IC11 3.15A PCB2 MRCW outdoor NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. t ° t ° t ° C74 , C75 IN CASE OF IN CASE OF...

  • Page 220: Index

    Si04-803 Index Numerics compressor system sensor abnormality ....116 connectors ........... 20, 22, 24, 26 00 ................95 control PCB (indoor unit) ......21, 23, 25 3-minute standby ..........43, 50 control PCB (outdoor unit) ........27 A1 ................96 DC fan lock ............109 A5 ................97 DC voltage / current sensor abnormality .....
  • Page 221 Si04-803 L5 ..............125 HL3 ................ 26 P4 ..............119 HN3 ............... 26 U0 ..............127 horizontal blades ..........145 U2 ..............129 hot-start function ........... 43 U4 ..............103 UA ..............105 error codes and description ........95 indoor heat exchanger thermistor ... 44, 45, 102, 151 indoor unit PCB abnormality .........
  • Page 222 Si04-803 over current ..........58, 110, 125 S80 ............26, 180, 194 overload ............58, 107 S90 ..............26, 194 overload protector ..........26, 180 safety precautions ..........63 over-voltage detection ..........129 self-diagnosis digital display ........43 sensor malfunction detection ........ 58 service check function ........... 92 P4 .................119 shelter ..............
  • Page 223 Si04-803 wide-angle louvres ..........32 wiring diagrams ............206 Index...

  • Page 224: Drawings & Flow Charts

    Si04-803 Drawings & Flow Charts input over current detection ......... 110 installation condition check ......... 133 ARC433 ..............92 insufficient gas ............ 127 automatic airflow control ........33 insufficient gas control ........... 58 automatic operation ..........35 INTELLIGENT EYE ..........40 auto-swing ..............32 INTELLIGENT EYE sensor PCB .....
  • Page 225 Si04-803 RXD25DAVMA ..........205 RXD35DAV2Z ..........205 RXD35DAVMA ..........205 RXS25/35EBVMA ..........204 RYN25DAV1A ..........204 RYN35DAV1A ..........204 position sensor abnormality .........117 power supply waveforms check ......134 power transistor ...........198 power transistor check .........135 POWERFUL operation ...........42 programme dry function .........34 radiation fin temperature rise .......123 remote controller ............92 service check function ..........92 signal receiver PCB ........
  • Page 226 Specifications, designs and other content appearing in this brochure are current as of March 2008 but subject to change without notice. Si 04-803 Printed in Japan 03/2008 B AK...

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