Daikin E-Series Service Manual
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Daikin E-Series Service Manual

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Si04 - 604
Inverter Pair
Wall Mounted Type E-Series
[Applied Models]
Inverter Pair : Heat Pump

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  • Page 1 Si04 - 604 Inverter Pair Wall Mounted Type E-Series [Applied Models] Inverter Pair : Heat Pump...
  • Page 2 Si04-604 Inverter Pair E-Series Heat Pump Indoor Unit FTXG25EVMAW FTXG35EVMAW FTXG25EVMAS FTXG35EVMAS FTXG25EV1BW FTXG35EV1BW FTXG25EV1BS FTXG35EV1BS ATXG25EV1B ATXG35EV1B Outdoor Unit RXG25EVMA RXG35EVMA RXG25E2V1B RXG35E2V1B ARXG25E2V1B ARXG35E2V1B Table of Contents...

  • Page 3: Table Of Contents

    Si04-604 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 Part 3 Printed Circuit Board Connector Wiring Diagram ..........11 1. Printed Circuit Board Connector Wiring Diagram........12 1.1 Indoor Unit....................12 1.2 Outdoor Unit ...................14 Part 4...
  • Page 4 Si04-604 Part 5 System Configuration............45 1. System Configuration................46 2. Instruction....................47 2.1 Safety Precautions .................47 2.2 Names of Parts..................49 2.3 Preparation before Operation..............52 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........55 2.5 Adjusting the Air Flow Detection ............57 2.6 POWERFUL Operation ................59 2.7 OUTDOOR UNIT SILENT Operation .............60 2.8 INTELLIGENT EYE Operation ...............61...
  • Page 5 Si04-604 Part 7 Removal Procedure ............115 1. Indoor Unit...................116 1.1 Removal of Air Filter................116 1.2 Removal of Front Grille ................118 1.3 Removal of Assembly of Front Panel Mechanism........124 1.4 Removal of Lamp Cover...............127 1.5 Removal of Horizontal Blade..............128 1.6 Removal of Reduction Motor..............130 1.7 Removal of Outlet Grille ...............133 1.8 Removal of Vertical Blades and Swing Motor ........134 1.9 Removal of Electrical Box ..............138...

  • Page 6: Introduction

    Si04-604 Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.

  • Page 7: Cautions Regarding Products After Repair

    Introduction Si04-604 Warning Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.

  • Page 8: Inspection After Repair

    Si04-604 Introduction Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.

  • Page 9: Using Icons

    Introduction Si04-604 Warning Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances, since it can cause an electrical shock, excessive heat generation or fire. Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure.

  • Page 10: Part 1 List Of Functions

    Si04-604 Part 1 List of Functions 1. List of Functions ..................2 List of Functions...

  • Page 11: List Of Functions

    List of Functions Si04-604 List of Functions Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — Virustatic Functions Operation Limit for Cooling (°CDB) Basic –15 Function Operation Limit for Heating (°CWB) Photocatalytic Deodorizing Filter —...
  • Page 12 Si04-604 List of Functions Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — Virustatic Functions Operation Limit for Cooling (°CDB) Basic –15 –15 Function Operation Limit for Heating (°CWB) Photocatalytic Deodorizing Filter — —...
  • Page 13 List of Functions Si04-604 List of Functions...

  • Page 14: Part 2 Specifications

    Si04-604 Part 2 Specifications 1. Specifications ..................6 Specifications...

  • Page 15: Specifications

    Specifications Si04-604 Specifications 50Hz 220-230-240V / 60Hz 220-230V Indoor Units FTXG25EVMAW FTXG25EVMAS Model RXG25EVMA RXG25EVMA 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 8,500 (4,400~10,200) 11,600 (4,400~15,400) 8,500 (4,400~10,200) 11,600 (4,400~15,400) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,920 (1,120~3,870)
  • Page 16 Si04-604 Specifications 50Hz 220-230-240V / 60Hz 220-230V Indoor Units FTXG35EVMAW FTXG35EVMAS Model RXG35EVMA RXG35EVMA Outdoor Units Cooling Heating Cooling Heating 3.5 (1.4~3.8) 4.2 (1.4~5.0) 3.5 (1.4~3.8) 4.2 (1.4~5.0) Capacity Btu/h 11,900 (4,800~13,000) 14,300 (4,800~17,100) 11,900 (4,800~13,000) 14,300 (4,800~17,100) Rated (Min.~Max.) kcal/h 3,010 (1,200~3,270) 3,610 (1,200~4,300)
  • Page 17 Specifications Si04-604 50Hz 220-230-240V Indoor Units FTXG25EV1BW FTXG25EV1BS Model RXG25E2V1B RXG25E2V1B 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 8,500 (4,400~10,200) 11,600 (4,400~15,400) 8,500 (4,400~10,200) 11,600 (4,400~15,400) 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 18 Si04-604 Specifications 50Hz 220-230-240V Indoor Units FTXG35EV1BW FTXG35EV1BS Model RXG35E2V1B RXG35E2V1B Outdoor Units Cooling Heating Cooling Heating 3.5 (1.4~3.8) 4.2 (1.4~5.0) 3.5 (1.4~3.8) 4.2 (1.4~5.0) Capacity Btu/h 11,900 (4,800~13,000) 14,300 (4,800~17,100) 11,900 (4,800~13,000) 14,300 (4,800~17,100) Rated (Min.~Max.) kcal/h 3,010 (1,200~3,270) 3,610 (1,200~4,300) 3,010 (1,200~3,270) 3,610 (1,200~4,300)
  • Page 19 Specifications Si04-604 50Hz 220-230-240V Indoor Units ATXG25EV1B ATXG35EV1B Model ARXG25E2V1B ARXG35E2V1B Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.5) 3.5 (1.4~3.8) 4.2 (1.4~5.0) Capacity Btu/h 8,500 (4,400~10,200) 11,600 (4,400~15,400) 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 (1,120~3,870) 3,010 (1,200~3,270) 3,610 (1,200~4,300)

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

    Si04-604 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........12 1.1 Indoor Unit....................12 1.2 Outdoor Unit ...................14 Printed Circuit Board Connector Wiring Diagram...

  • Page 21: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram Si04-604 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors PCB(1) (Control PCB) Connector for fan motor Connector for centralized control (HA) Connector for heat exchanger thermistor Connector for INTELLIGENT EYE sensor PCB and control Connector for swing motor Connector for signal receiver PCB Connector for reduction motor (front panel mechanism)
  • Page 22 Si04-604 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) JA JC (R4991) PCB(2): Signal Receiver PCB RTH1 LED4 LED2 LED3 (R4992) PCB(3): INTELLIGENT EYE sensor PCB (R4988) Printed Circuit Board Connector Wiring Diagram...

  • Page 23: Outdoor Unit

    Printed Circuit Board Connector Wiring Diagram Si04-604 Outdoor Unit Connectors PCB(1) (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) HC3, HC4, HL3, HN3...
  • Page 24 Si04-604 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (outdoor unit) S40 LED A FU2(3.15A) (R4993) FU1(3.15A) PCB(2): Filter PCB FU3(20A) (R4994) Printed Circuit Board Connector Wiring Diagram...
  • Page 25 Printed Circuit Board Connector Wiring Diagram Si04-604 Printed Circuit Board Connector Wiring Diagram...

  • Page 26: Part 4 Function And Control

    Si04-604 Part 4 Function and Control 1. Main Functions..................18 1.1 Frequency Principle................18 1.2 Power-Airflow Flap, Wide-Angle Louvres and Auto-Swing ....20 1.3 Operation Starting Control..............21 1.4 Fan Speed Control for Indoor Units............22 1.5 Programme Dry Function ...............23 1.6 Automatic Operation................24 1.7 Thermostat Control.................25 1.8 NIGHT SET Mode ..................26 1.9 INTELLIGENT EYE ................27 1.10 Inverter POWERFUL Operation .............28...

  • Page 27: Main Functions

    Main Functions Si04-604 1. Main Functions Note: See the list of functions for the functions applicable to different models. Frequency Principle Main Control The compressor is frequency-controlled during normal operation. The target frequency is set by the following 2 parameters coming from the operating indoor unit: Parameters The load condition of the operating indoor unit The difference between the room temperature and the set temperature...
  • Page 28 Si04-604 Main Functions Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outside temperature and cooling/heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables a quick set temperature.

  • Page 29: Power-Airflow Flap, Wide-Angle Louvres And Auto-Swing

    Main Functions Si04-604 Power-Airflow Flap, Wide-Angle Louvres and Auto- Swing Power-airflow The large flap sends a large volume of air downwards to the floor. The flap provides an optimum control area in cooling, heating and dry mode. Flap Heating Mode During heating mode, the large flap enables direct warm air straight downwards.

  • Page 30: Operation Starting Control

    Si04-604 Main Functions Operation Starting Control The system carries out the following control at the beginning to conduct every functional parts properly. 1. Opening the front panel fully 2. Output of the ∆D signal after the front panel starts moving 3.

  • Page 31: Fan Speed Control For Indoor Units

    Main Functions Si04-604 Fan Speed Control for Indoor Units Control Mode The airflow rate can be automatically controlled depending on the difference between the set temperature and the room temperature. This is done through phase control and hall IC control. For more information about Hall IC, refer to the troubleshooting for fan motor on page 81.

  • Page 32: Programme Dry Function

    Si04-604 Main Functions 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 33: Automatic Operation

    Main Functions Si04-604 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 34: Thermostat Control

    Si04-604 Main Functions 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 35: Night Set Mode

    Main Functions Si04-604 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. 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 36: Intelligent Eye

    Si04-604 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 37: Inverter Powerful Operation

    Main Functions Si04-604 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 38: Other Functions

    Si04-604 Main Functions 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 39: Function Of Thermistor

    Function of Thermistor Si04-604 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. 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)

  • Page 40: Control Specification

    Si04-604 Control Specification 3. Control Specification Mode Hierarchy Outline There are two modes; the mode selected in user’s place (normal air conditioning mode) and forced operation mode for installation and providing service. Detail 1. For heat pump model There are following modes; stop, cooling (includes drying), heating (include defrosting) Air conditioner control mode Forced operating mode Forced cooling (for Pump Down Operation)

  • Page 41: Frequency Control

    Control Specification Si04-604 Frequency Control Outline Frequency will be determined according to the difference between room and set temperature. The function is explained as follows. 1. How to determine frequency. 2. Frequency command from an indoor unit. (The difference between a room temperature and the temperature set by the remote controller.) 3.

  • Page 42: Controls At Mode Changing / Start-Up

    Si04-604 Control Specification Indoor Frequency Command (∆D signal) The difference between a room temperature and the temperature set by the remote controller will be taken as the “∆D signal” and is used for frequency command. ∆D ∆D ∆D ∆D Temperature Temperature Temperature Temperature...

  • Page 43: Minutes Standby

    Control Specification Si04-604 3.3.2 Four Way Valve Switching Outline of Heat Pump Only During the heating operation current must be conducted and during cooling and defrosting Heating current must not be conducted. In order to eliminate the switching sound (as the four way valve Operation coil switches from ON to OFF) when the heating is stopped, the delay switch of the four way valve must be carried out after the operation stopped.

  • Page 44: Discharge Pipe Control

    Si04-604 Control Specification Discharge Pipe Control Outline The discharge pipe temperature is used as the compressor's internal temperature. If the discharge pipe temperature rises above a certain level, the operating frequency upper limit is set to keep this temperature from going up further. Detail Divide the Zone Management within the Zones...

  • Page 45: Freeze-Up Protection Control

    Control Specification Si04-604 Freeze-up Protection Control Outline During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings. Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from...

  • Page 46: Fan Control

    Si04-604 Control Specification Fan Control Outline Fan control is carried out according to the following priority. 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 47: Defrost Control

    Control Specification Si04-604 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 48: Electronic Expansion Valve Control

    Si04-604 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 49: Discharge Pipe

    Control Specification Si04-604 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 50 Si04-604 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 51: Malfunctions

    Control Specification Si04-604 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 52: Forced Operation Mode

    Si04-604 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 20°C higher than target value and the electronic expansion value opening is 450 pulses (max.), the adjustment is made for insufficient gas.
  • Page 53 Control Specification Si04-604 Function and Control...

  • Page 54: Part 5 System Configuration

    Si04-604 Part 5 System Configuration 1. System Configuration................46 2. Instruction....................47 2.1 Safety Precautions .................47 2.2 Names of Parts..................49 2.3 Preparation before Operation..............52 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........55 2.5 Adjusting the Air Flow Detection ............57 2.6 POWERFUL Operation ................59 2.7 OUTDOOR UNIT SILENT Operation .............60 2.8 INTELLIGENT EYE Operation ...............61...

  • Page 55: System Configuration

    System Configuration Si04-604 1. System Configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know a clever method of using it.

  • Page 56: Instruction

    • Do not attempt to repair, relocate, modify or reinstall the air conditioner by yourself. Incorrect work will cause electric shocks, fire etc. For repairs and reinstallation, consult your Daikin dealer for advice and information. • Do not insert fingers, poles, or other objects into the moving parts of the front panel or the outlet vent panel.

  • Page 57: Installation Site

    Instruction Si04-604 • 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 58: Names Of Parts

    Si04-604 Instruction Names of Parts Names of parts Indoor Unit (With the panel closed) System Configuration...
  • Page 59 Instruction Si04-604 Outdoor Unit Indoor Unit 1. Air filter • The operation mode refers to the following table. 2. Titanium Apatite Photocatalytic Tempera- Air flow Air-Purifying Filter: Mode ture setting rate • These filters are attached to the inside of FTXG AUTO 25°C...

  • Page 60: Remote Controller

    Si04-604 Instruction Remote Controller 1. Signal transmitter: 8. SILENT button: OUTDOOR UNIT SILENT • It sends signals to the indoor unit. operation (page 15.) 2. Display: 9. FAN setting button: • It displays the current settings. • It selects the air flow rate setting. (In this illustration, each section is shown with all 10.

  • Page 61: Preparation Before Operation

    Instruction Si04-604 Preparation before Operation Preparation Before Operation To set the batteries 1. Slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION About batteries • When replacing the batteries, use batteries of the same type, and replace the two old batteries together.
  • Page 62 Si04-604 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 controller, such as a curtain, the unit will not operate.
  • Page 63 Instruction Si04-604 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 rap- idly increases or decreases the time dis- play.

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

    Si04-604 Instruction AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode.
  • Page 65 Instruction Si04-604 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 66: Adjusting The Air Flow Detection

    Si04-604 Instruction Adjusting the Air Flow Detection Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. To adjust the horizontal blade (flap) 1. Press “SWING button ” . • “ ” is displayed on the LCD. 2.
  • Page 67 Instruction Si04-604 To start COMFORT AIRFLOW operation 5. Press “COMFORT AIRFLOW button”. The flap orientation 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 68: Powerful Operation

    Si04-604 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 before POWERFUL operation.

  • Page 69: Outdoor Unit Silent Operation

    Instruction Si04-604 OUTDOOR UNIT SILENT Operation OUTDOOR UNIT SILENT Operation OUTDOOR UNIT SILENT operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. To start OUTDOOR UNIT SILENT operation 1.

  • Page 70: Intelligent Eye Operation

    Si04-604 Instruction 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 INTELLIGENT EYE operation 2.
  • Page 71 Instruction Si04-604 “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 72: Timer Operation

    Si04-604 Instruction TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...
  • Page 73 Instruction Si04-604 To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. (page 9.) 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.

  • Page 74: Care And Cleaning

    Si04-604 Instruction 2.10 Care and Cleaning Care and Cleaning • Before cleaning, be sure to stop the operation and turn the breaker OFF. CAUTION • Always shut down the unit (and close the panel) before doing any work. Opening the panel during operation may cause the panel to fall off. Units Indoor unit, Outdoor unit and Remote controller 1.

  • Page 75: Air Filter

    Instruction Si04-604 Filters 1. Open the front panel. • Open the front panel by placing a finger on the panel tab on either side of the front panel and then secure it using the supporting plate on the right. 2. Pull out the air filters. •...

  • Page 76: Before A Long Idle Period

    Si04-604 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. • To order Titanium Apatite Photocatalytic Air-Purifying Filter contact to the service shop there you bought the air conditioner.

  • Page 77: Troubleshooting

    Instruction Si04-604 2.11 Troubleshooting Trouble Shooting These cases are not troubles. The following cases are not air conditioner troubles but have some reasons. You may just continue using it. Case Explanation Operation does not start soon. • This is to protect the air conditioner. •...
  • Page 78 Si04-604 Instruction Check again. Please check again before calling a repair person. Case Check The air conditioner does not • Hasn’t a breaker turned OFF or a fuse blown? operate. • Isn’t it a power failure? (OPERATION lamp is off.) •...

  • Page 79: Disposal Requirements

    Instruction Si04-604 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 80: Part 6 Service Diagnosis

    Si04-604 Part 6 Service Diagnosis 1. Caution for Diagnosis................72 2. Problem Symptoms and Measures ............73 3. Service Check Function ................74 4. Troubleshooting ..................77 4.1 Error Codes and Description ..............77 4.2 Indoor Unit PCB Abnormality ..............78 4.3 Freeze-up Protection Control or High Pressure Control......79 4.4 Fan Motor (DC Motor) or Related Abnormality........81 4.5 Thermistor or Related Abnormality (Indoor Unit)........83 4.6 Front Panel Open / Close Fault..............84...

  • Page 81: Caution For Diagnosis

    Caution for Diagnosis Si04-604 1. Caution for Diagnosis The operation lamp flashes when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation. 2.

  • Page 82: Problem Symptoms And Measures

    Si04-604 Problem Symptoms and Measures Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page None of the units operates. Check the power supply. Check to make sure that the rated voltage is — supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...

  • Page 83: Service Check Function

    Service Check Function Si04-604 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 84 Si04-604 Service Check Function Check Method 2 1. Enter the diagnosis mode. Press the 3 buttons (TEMP ,TEMP , MODE) simultaneously. (R4086) The digit of the number of tens blinks. Try again from the start when the digit does not blink. (R4087) 2.
  • Page 85 Service Check Function Si04-604 5. Press the TEMP button. Press TEMP or TEMP and change the digit until you hear the sound of “beep”. (R4088) 6. Diagnose by the sound. “ pi ” : The both numbers of tens and units do not accord with the error code. “...

  • Page 86: Troubleshooting

    Si04-604 Troubleshooting Troubleshooting Error Codes and Description Reference Code Indication Description Page System — Normal Insufficient gas Over-voltage detection Signal transmission error (between indoor and outdoor unit) Signal transmission error (between indoor unit and wired remote controller) Unspecified voltage (between indoor and outdoor unit) Indoor Indoor unit PCB abnormality Unit...

  • Page 87: Indoor Unit Pcb Abnormality

    Troubleshooting Si04-604 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 Faulty connector connection Causes Faulty terminal strip of indoor unit...

  • Page 88: Freeze-Up Protection Control Or High Pressure Control

    Si04-604 Troubleshooting Freeze-up Protection Control High Pressure Control Remote Controller Display Method of High pressure control (heat pump model only) During heating operations, the temperature detected by the indoor heat exchanger Malfunction thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection The freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
  • Page 89 Troubleshooting Si04-604 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Refer to P.110 Check the air passage. Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 90: Fan Motor (Dc Motor) Or Related Abnormality

    Si04-604 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 abnormal fan motor operation. Malfunction Detection Malfunction When the detected rotation speed is less than 50% of the HH tap under maximum fan motor rotation demand.
  • Page 91 Troubleshooting Si04-604 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.108 and rotate fan by hand. Does fan rotate Replace fan motor. smoothly? Turn power ON and operate fan.

  • Page 92: Thermistor Or Related Abnormality (Indoor Unit)

    Si04-604 Troubleshooting 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 93: Front Panel Open / Close Fault

    Troubleshooting Si04-604 Front Panel Open / Close Fault Remote Controller Display Method of Malfunction Detection Malfunction The system will be shut down when the error occurs twice. Decision Conditions Supposed Malfunction of the reduction motor Malfunction or deterioration of the front panel mechanism Causes Malfunction of the limit switch Troubleshooting...

  • Page 94: Signal Transmission Error (Between Indoor And Outdoor Unit)

    Si04-604 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 95: Signal Transmission Error (Between Indoor Unit And Wired Remote Controller)

    Troubleshooting Si04-604 Signal Transmission Error (between Indoor Unit and Wired Remote Controller) Remote Controller Display Method of The data received from the indoor unit in indoor unit-wired remote controller signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the indoor unit cannot be received normally, or when the content of the data is abnormal.

  • Page 96: Unspecified Voltage (Between Indoor And Outdoor Unit)

    Si04-604 Troubleshooting Unspecified Voltage (between Indoor and Outdoor Unit) 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 97: Outdoor Unit Pcb Abnormality

    Troubleshooting Si04-604 4.10 Outdoor Unit PCB Abnormality Remote Controller Display Method of The proper programme operation of the microcomputer is checked by the programme. Checking whether the EEPROM data have the information of the outdoor unit Malfunction Detection Malfunction When the microcomputer programme does not function properly When the information of the outdoor unit (the type of the electronic expansion valve) is Decision unidentified in the EEPROM data...

  • Page 98: Ol Activation (Compressor Overload)

    Si04-604 Troubleshooting 4.11 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 99: Compressor Lock

    Troubleshooting Si04-604 4.12 Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the position detection circuit. Malfunction 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 100: Dc Fan Lock

    Si04-604 Troubleshooting 4.13 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 detected by the Hall IC. Malfunction 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 101: Input Over Current Detection

    Troubleshooting Si04-604 4.14 Input Over Current Detection Remote Controller Display Method of An input over-current is detected by checking the input current value with the compressor running. Malfunction Detection Malfunction The following current with the compressor running continues for 2.5 seconds. Cooling Heating: Above 12A Decision...

  • Page 102: Four Way Valve Abnormality

    Si04-604 Troubleshooting 4.15 Four Way Valve Abnormality Remote Controller Display Method of The indoor air temperature thermistor, the indoor unit heat exchanger thermistor, the outdoor temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if Malfunction they function within their normal ranges in the operating mode.
  • Page 103 Troubleshooting Si04-604 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.109 Four way valve coil Correct. disconnected (loose)? Check No.06 Refer to P.110 Reconnect. Harness out of connector? Check No.11 Refer to P.113...

  • Page 104: Discharge Pipe Temperature Control

    Si04-604 Troubleshooting 4.16 Discharge Pipe Temperature Control Remote Controller Display Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the temperature being detected by the discharge pipe thermistor. Malfunction Detection Malfunction If a stop takes place 4 times successively due to abnormal discharge pipe temperature, the system will be shut down.

  • Page 105: High Pressure Control In Cooling

    Troubleshooting Si04-604 4.17 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 temperature being sensed by the heat exchanger thermistor exceeds the limit. Malfunction Detection Malfunction Activated when the temperature being sensed by the heat exchanger thermistor rises above 65°C.
  • Page 106 Si04-604 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.108 Check the installation space. Check No.06 Check No. 07 Abnormal Refer to P.110 Installation condition Change the air outlet grille check...

  • Page 107: Sensor Abnormality Around Compressor System

    Troubleshooting Si04-604 4.18 Sensor Abnormality around Compressor System Remote Controller Display Method of Detecting by the valve of direct current before the compressor starts up. Malfunction Detection Malfunction When the value of direct current before the compressor starts up is not within 0.5~4.5V (Sensor output is converted into voltage.) Decision When the value of direct voltage before the compressor starts up is under 50V.

  • Page 108: Position Sensor Abnormality

    Si04-604 Troubleshooting 4.19 Position Sensor Abnormality Remote Controller Display Method of A compressor startup failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal is sent.

  • Page 109: Dc Voltage / Current Sensor Abnormality

    Troubleshooting Si04-604 4.20 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 input current multiplied DC voltage and current. Malfunction 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 110: Thermistor Or Related Abnormality (Outdoor Unit)

    Si04-604 Troubleshooting 4.21 Thermistor or Related Abnormality (Outdoor Unit) J3, J6, H9 Remote Controller Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. [A thermistor error is detected by checking the temperature.] Malfunction Detection Malfunction...
  • Page 111 Troubleshooting Si04-604 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Refer to P.110 Turn on the power again. Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.

  • Page 112: Output Over Current Detection

    Si04-604 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 113 Troubleshooting Si04-604 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.111 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.

  • Page 114: Insufficient Gas

    Si04-604 Troubleshooting 4.23 Insufficient Gas Remote Controller Display Method of Gas shortage detection I : A gas shortage is detected by checking the compressor running frequency. Malfunction 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 115 Troubleshooting Si04-604 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.108 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.06 * Room temperature thermistor * Outdoor air thermistor...

  • Page 116: Over-Voltage Detection

    Si04-604 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 117: Check

    Check Si04-604 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 118: Si04

    Si04-604 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 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 119: Thermistor Resistance Check

    Check Si04-604 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 120: Installation Condition Check

    Si04-604 Check 5.1.5 Installation Condition Check Check No.07 Installation condition check Check the allowable Abnormal Change the position of the air dimensions of the air suction discharge grille or the and discharge area. installation location. Normal Does the discharged air from other outdoor Change the position of the air unit cause an increase of discharge grille or the...

  • Page 121: Discharge Pressure Check

    Check Si04-604 5.1.6 Discharge Pressure Check Check No.08 Discharge pressure check High Replace compessor. Open the stop valve. Is the stop valve open? Is the Replace the pipe installed at connection pipe deformed? the site. At the heat exchanger and Clean.

  • Page 122: Power Supply Waveforms Check

    Si04-604 Check 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 the waveform disturbance. Check to see if the power supply waveform is a sine wave (Fig.1). Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2) [Fig.1] [Fig.2]...

  • Page 123: Power Transistor Check

    Check Si04-604 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 124: Part 7 Removal Procedure

    Si04-604 Part 7 Removal Procedure 1. Indoor Unit...................116 1.1 Removal of Air Filter................116 1.2 Removal of Front Grille ................118 1.3 Removal of Assembly of Front Panel Mechanism........124 1.4 Removal of Lamp Cover...............127 1.5 Removal of Horizontal Blade..............128 1.6 Removal of Reduction Motor..............130 1.7 Removal of Outlet Grille ...............133 1.8 Removal of Vertical Blades and Swing Motor ........134 1.9 Removal of Electrical Box ..............138...

  • Page 125: Indoor Unit

    Indoor Unit Si04-604 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. Features Front panel (top) Slot-in panel Room temperature sensor (R5001) When the signal receiver catches a signal from the...
  • Page 126 Si04-604 Indoor Unit Procedure Points Step Lift an air filter upwards The right and left air filters slightly and then pull it are interchangeable. out downwards. Insert the air filters along grooves when installing. When installing, insert 2 hooks of the air filter completely.

  • Page 127: Removal Of Front Grille

    Indoor Unit Si04-604 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. Remove the front panel. Open the front panel to the horizontal position. Release the both sides pivots and remove the front panel.
  • Page 128 Si04-604 Indoor Unit Procedure Points Step The slot-in panel is fixed only at the both ends. When assembling, fit the axes of the slot-in panel from above. Push the lower part of the slot-in panel and attach to the running gear.
  • Page 129 Indoor Unit Si04-604 Procedure Points Step The service cover has 2 hooks on the right side and 4 hooks on the lower side. Hooks Hooks (R5014) When assembling, fit the right side hooks and insert the lower hooks while bending the service cover. (R5016) Loosen the screw on the service cover of...
  • Page 130 Si04-604 Indoor Unit Procedure Points Step Pull down and remove the service cover of electrical box. Loosen the screw on the fixing plate. Push the white section on the terminal board and release the relay wires. Removal Procedure...
  • Page 131 Indoor Unit Si04-604 Procedure Points Step 4. Remove the front grille. The front grille has no screw inside flaps. Loosen the 5 screws. The front grille has 3 Hooks hooks on the upper side. (R5018) Lift the upper part of the Be careful not to cut your front grille and release finger by the fins of the heat...
  • Page 132 Si04-604 Indoor Unit Procedure Points Step Release the both sides hooks. Pull the front grille out When assembling, install the horizontally and remove front grille horizontally so as not to stuff the flap inside. When assembling, make sure the three hooks are caught properly.

  • Page 133: Removal Of Assembly Of Front Panel Mechanism

    Indoor Unit Si04-604 Removal of Assembly of Front Panel Mechanism Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the front grille. 1. Remove the assembly of front panel mechanism.
  • Page 134 Si04-604 Indoor Unit Procedure Points Step Loosen the 2 screws of the assembly (right). Remove the assembly. When assembling, insert the lower rack plate first. Lower rack plate (R5028) Removal Procedure...
  • Page 135 Indoor Unit Si04-604 Procedure Points Step 2. Remove the lower rack plate. Loosen the 3 screws of the left assembly cover. Hold the assembly hori- When you demand small zontally and release the parts like cogs and rollers, upper hook. order a set of assembly.

  • Page 136: Removal Of Lamp Cover

    Si04-604 Indoor Unit Removal of Lamp Cover Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the front grille. 1. Remove the lamp cover. Release the 2 hooks carefully.

  • Page 137: Removal Of Horizontal Blade

    Indoor Unit Si04-604 Removal of Horizontal Blade Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the horizontal The horizontal blade is blade. single. Release the center pivot.
  • Page 138 Si04-604 Indoor Unit Procedure Points Step 2. Remove the swing motor. The swing motor for horizontal blade is on the left Pull out and remove the side. swing motor connector. Loosen the screw. Pull toward left and The axis has a keyhole. remove the swing motor.

  • Page 139: Removal Of Reduction Motor

    Indoor Unit Si04-604 Removal of Reduction Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the front grille. 1. Remove the assembly of reduction motor. Undo the 2 hooks and remove the assembly.
  • Page 140 Si04-604 Indoor Unit Procedure Points Step 2. Remove the reduction motor. Loosen the screw. Undo the one hook on the opposite upper side. Undo the one hook in the center. Removal Procedure...
  • Page 141 Indoor Unit Si04-604 Procedure Points Step Hold the cog horizontally and open the motor side toward Layout of the harness of the motor. Lift and remove the reduction motor. Pull and disconnect the connector for the motor. Removal Procedure...

  • Page 142: Removal Of Outlet Grille

    Si04-604 Indoor Unit Removal of Outlet Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the front grille. Remove the assembly of the reduction motor. 1.

  • Page 143: Removal Of Vertical Blades And Swing Motor

    Indoor Unit Si04-604 Removal of Vertical Blades and Swing Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the assembly of the outlet grille. 1. Remove the vertical blades.
  • Page 144 Si04-604 Indoor Unit Procedure Points Step Remove the interlock rod from the vertical blades. (R3834) (R3835) Pull out the interlock You cannot dismantle the rod from the swing caulking section. motor side. Push the hooks on the back of the vertical blades and remove.
  • Page 145 Indoor Unit Si04-604 Procedure Points Step 2. Remove the swing motor. Disconnect the connector for the swing motor. Loosen the screw and remove the swing motor. Peel the fixing tape. Removal Procedure...
  • Page 146 Si04-604 Indoor Unit Procedure Points Step Loosen the screw and The projection is fragile. Be pull out the swing careful so as not to break it. motor. Disconnect the connector for the swing motor. Removal Procedure...

  • Page 147: Removal Of Electrical Box

    Indoor Unit Si04-604 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 front grille. Discharge the static Drip proof plate electricity from your body 1.
  • Page 148 Si04-604 Indoor Unit Procedure Points Step Push the hook on the right side and remove the electrical box cover. Layout of the wiring Loosen the screw of the earth. Removal Procedure...
  • Page 149 Indoor Unit Si04-604 Procedure Points Step Disconnect the The harnesses for the connector for the swing horizontal swing motor and motors for horizontal the vertical swing motor are and vertical blades united. (S41). Release the harness from the hook. Disconnect the connector for the fan motor (S1).
  • Page 150 Si04-604 Indoor Unit Procedure Points Step Disconnect the connector for the reduction motor (front panel mechanism) (S49). Release the harness from the hook. Release the heat Pay attention so as not to exchanger thermistor. lose the clip. Release the thermistor When reassembling, hang lead wire from the hook.
  • Page 151 Indoor Unit Si04-604 Procedure Points Step Layout of the lead wire for the heat exchanger thermistor Loosen the screw of the electrical box. Tilt the front part of the electrical box to the right slightly and pull it out. Removal Procedure...
  • Page 152 Si04-604 Indoor Unit Procedure Points Step When assembling, push the electrical box upright and make sure to fit the hook on the backside. Removal Procedure...

  • Page 153: Removal Of Pcb

    Indoor Unit Si04-604 1.10 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 Remove the electrical box. 1. Remove the control PCB. Lift up the cover of the electrical box and open Release the right hook and remove the cover.
  • Page 154 Si04-604 Indoor Unit Procedure Points Step Loosen the screws of the earth. Release the front hook and the 2 upper hooks, and remove the shelter. Removal Procedure...
  • Page 155 Indoor Unit Si04-604 Procedure Points Step Layout of the wiring Loosen the screw and pull out the terminal board. Removal Procedure...
  • Page 156 Si04-604 Indoor Unit Procedure Points Step Pull out the limit switch. Disconnect the Pb free soldering is adopted terminals from the for PCB. board. When replacing PCB, use the particular solder and iron. Black······(1) White······(2) Red ········(3) Cut the clamps. Clamps should be used all the time.
  • Page 157 Indoor Unit Si04-604 Procedure Points Step Release the hooks and draw out the harness from the ditch. Loosen the 2 screws and remove the PCB. Control PCB S51JB JA JC (R5062) Removal Procedure...
  • Page 158 Si04-604 Indoor Unit Procedure Points Step 2. Remove the signal receiver PCB. Release the hook with a flat screwdriver. Release the hook and remove the receiver unit. Release the 2 hooks and remove the signal receiver PCB. Removal Procedure...

  • Page 159: Removal Of Heat Exchanger

    Indoor Unit Si04-604 1.11 Removal of Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the electrical You can detach the indoor box. unit without removing the assembly of the outlet grille.
  • Page 160 Si04-604 Indoor Unit Procedure Points Step 3. Remove the piping fixture plate. Release the 2 hooks with a flat screwdriver from the front side. Release the hook from the back side. Lift up the lower part of the fixture plate and remove it.
  • Page 161 Indoor Unit Si04-604 Procedure Points Step 4. Remove the heat exchanger. Widen the auxiliary piping to the extent of 10°~20°. Loosen the 2 screws on the left. Push the fixing hook on Caution the right side and lift the When removing or heat exchanger.

  • Page 162: Removal Of Fan Rotor And Fan Motor

    Si04-604 Indoor Unit 1.12 Removal of Fan Rotor 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. Remove the right side plate. Loosen the 2 screws. Remove the right side plate.
  • Page 163 Indoor Unit Si04-604 Procedure Points Step 3. Remove the bearing. Lift up the right part of the fan rotor and motor, and slide them to the rightward to remove. Removal Procedure...
  • Page 164 Si04-604 Indoor Unit Procedure Points Step Hold the lower outside of the bearing. Push it inwards and lift to release the hook. 4. Remove the fan motor. Loosen the fixing screw and remove the fan motor. Removal Procedure...

  • Page 165: Outdoor Unit

    Outdoor Unit Si04-604 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 Be careful not to cut your finger by the fins of the heat exchanger.
  • Page 166 Si04-604 Outdoor Unit Procedure Points Step 2. Remove the panels. Loosen the 3 screws (front, right, left) and lift the top panel. Remove the drip proof plate. Disconnect the The fan motor is united with connector for fan motor the front panel. (S70).
  • Page 167 Outdoor Unit Si04-604 Procedure Points Step Undo the hooks. The front panel has 4 hooks. Pull and remove the The fan motor is united with front panel. the front panel. 3. Remove the fan motor. The screw has reverse winding. Unscrew the washer- fitted nut (M10) of the propeller fan with a...
  • Page 168 Si04-604 Outdoor Unit Procedure Points Step Loosen the 2 screws and lift the bell mouth to undo the hooks. Remove the bell mouth. Loosen the fixing hooks Put the lead wire through the and release the lead back of the motor when wire.
  • Page 169 Outdoor Unit Si04-604 Procedure Points Step Loosen the 4 screws to M4×16 remove the fan motor. DC fan motor Loosen the 2 screws to remove the fan motor fixing frame. Removal Procedure...
  • Page 170 Si04-604 Outdoor Unit Procedure Points Step 4. Remove the right side panel. Loosen the 2 screws on the rear side. Loosen the 3 screws on the right side. Loosen the screw and lift the connection port to remove. Removal Procedure...
  • Page 171 Outdoor Unit Si04-604 Procedure Points Step When assembling, make sure to fit the hook. Removal Procedure...

  • Page 172: Removal Of Electrical Box

    Si04-604 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 173 Outdoor Unit Si04-604 Procedure Points Step Release the discharge Be careful so as not to lose pipe thermistor. the clip for thermistor. Release the heat Be careful so as not to lose exchanger thermistor. the clip. Lift and remove the electrical box.

  • Page 174: Removal Of Reactor And Partition Plate

    Si04-604 Outdoor Unit 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. Remove the electrical box. 1. Remove the reactor. Loosen the screw.
  • Page 175 Outdoor Unit Si04-604 Procedure Points Step The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. When assembling, fit the lower hook into the bottom frame. Removal Procedure...

  • Page 176: Removal Of Sound Blanket

    Si04-604 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 177 Outdoor Unit Si04-604 Procedure Points Step 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 178: Removal Of Four Way Valve

    Si04-604 Outdoor Unit Removal of Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the peripheries. Remove the four way valve and the sheets of putty so as not to burn them.
  • Page 179 Outdoor Unit Si04-604 Procedure Points Step Remove the sheets of putty. Cut the pipe with a tube cutter. Heat up the brazed part Provide a protective sheet or and withdraw the piping a steel plate so that the with pliers. brazing flame cannot influence peripheries.

  • Page 180: Removal Of Compressor

    Si04-604 Outdoor Unit Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the compressor. Unscrew the nut of the compressor. Warning Ventilate when refrigerant leaks during the work.
  • Page 181 Outdoor Unit Si04-604 Procedure Points Step Heat up the brazed part of the suction side and disconnect. Lift the compressor up and remove it. Removal Procedure...

  • Page 182: Removal Of Pcb

    Si04-604 Outdoor 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. 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 183 Outdoor Unit Si04-604 Procedure Points Step Loosen the 4 screws. Undo the 3 hooks on the upper side. Lift and pull out the PCB. Removal Procedure...
  • Page 184 Si04-604 Outdoor Unit Procedure Points Step Feature of the PCB S40 LED A S70: fan motor S80: four way valve S90: thermistor (outdoor air, heat exchanger, discharge pipe) FU2(3.15A) FU1(3.15A) (R5063) Removal Procedure...
  • Page 185 Outdoor Unit Si04-604 Removal Procedure...

  • Page 186: Part 8 Others

    Si04-604 Part 8 Others 1. Others ....................178 1.1 Test Run from the Remote Controller ..........178 1.2 Jumper Settings ...................179 Others...

  • Page 187: Others

    Others Si04-604 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 188: Jumper Settings

    Si04-604 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 189 Others Si04-604 Others...

  • Page 190: Part 9 Appendix

    Si04-604 Part 9 Appendix 1. Piping Diagrams..................182 2. Wiring Diagrams..................183 Appendix...

  • Page 191: Piping Diagrams

    Piping Diagrams Si04-604 Piping Diagrams FTXG25/35EVMAW(S), FTXG25/35EV1BW(S), ATXG25/35EV1B INDOOR UNIT HEAT EXCHANGER 7.0CuT 7.0CuT 7.0CuT THERMISTOR ON HEAT EXCH. 7.0CuT CROSS FLOW FAN FIELD PIPING (6.4CuT) FAN MOTOR 9.5CuT FIELD PIPING (9.5CuT) REFRIGERANT FLOW COOLING HEATING 4D045301B RXG25/35EVMA, RXG25/35E2V1B, ARXG25/35E2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER...

  • Page 192: Wiring Diagrams

    Si04-604 Wiring Diagrams Wiring Diagrams FTXG25/35EVMAW(S), FTXG25/35EV1BW(S), ATXG25/35EV1B PCB2 LED4 LED3 LED2 SIGNAL RECEIVER GRN / YLW WIRELESS FIELD WIRING. t° GRN / YLW REMOTE CONTROLLER PCB3 PCB1 TRANSMISSION CIRCUIT outdoor INTELLIGENT- EYE SENSOR CAUTION NOTE THAT OPERATION WILL 3.15A RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS RECTIFIER...
  • Page 193 Wiring Diagrams Si04-604 Appendix...

  • Page 194: Index

    Si04-604 Index Numerics control PCB (indoor unit) ......... 13, 78 control PCB (outdoor unit) ..... 15, 148, 173 00 ................77 cover 3-D airflow ..............20 lamp cover ............ 127 3-minutes standby ..........29, 34 motor cover ........... 153 service cover ..........119 stop valve cover ..........
  • Page 195 Si04-604 U4 ..............85 heat exchanger ........... 152 U5 ..............86 heat exchanger thermistor ........141 UA ..............87 heating peak-cut control ........36 error codes and description ........77 high pressure control ..........79 high pressure control in cooling ......96 HL3 ................ 14 F3 ................95 HN3 ...............
  • Page 196 Si04-604 opening limit ............40 operation lamp ............72 S1 ..............12, 140 outdoor air temperature thermistor .......102 S10 ................ 14 outdoor heat exchanger thermistor ..30, 102, 164 S11 ................ 14 outdoor unit fan system check ......112 S20 ................ 14 outdoor unit PCB abnormality ........88 S21 ................
  • Page 197 Si04-604 troubleshooting with LED indication .......72 turning speed pulse input on the outdoor unit PCB check ............114 U0 .................105 U2 .................107 U4 ................85 U5 ................86 UA ................87 unspecified voltage ..........87 V1 ..............12, 14 V2 ................14 V3 ................14 varistor .............12, 14 vertical blades ............134 voltage detection function ........43 wide-angle louvres ..........20...
  • Page 198 Si04-604 Drawings & Flow Charts inverter POWERFUL operation ......28 inverter units refrigerant system check ....113 ARC433A series ............74 automatic air flow control ........22 automatic operation ..........24 jumper settings ............ 179 auto-swing ..............20 mode hierarchy ............. 31 comfort airflow mode ..........20 compressor lock .............90 compressor protection function ......34 night set mode ............
  • Page 199 Si04-604 turning speed pulse input on the outdoor unit PCB check ............114 unspecified voltage ..........87 wiring diagrams ARXG25/35E2V1B ........183 ATXG25/35EV1B ...........183 FTXG25/35EV1BW(S) ........183 FTXG25/35EVMAW(S) ........183 RXG25/35E2V1B ...........183 RXG25/35EVMA ..........183 Drawings & Flow Charts...
  • Page 200 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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