Daikin FTXG25CVMAW Service Manual

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Operation manual (30 pages)

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Summary of Contents for Daikin FTXG25CVMAW

Page 1 Si04-402A Inverter Pair Wall Mounted Type C-Series [Applied Models] Inverter Pair : Heat Pump...
Page 2 Si04-402A Inverter Pair Inverter Pair Inverter Pair Inverter Pair C-Series C-Series C-Series C-Series Heat Pump Indoor Unit FTXG25CVMAW FTXG35CVMAW FTXG25CVMAS FTXG35CVMAS FTXG25CVMBW FTXG35CVMBW FTXG25CVMBS FTXG35CVMBS ATXG25CVMB ATXG35CVMB Outdoor Unit RXG25CVMA RXG35CVMA RXG25CVMB RXG35CVMB ARXG25CVMB ARXG35CVMB Table of Contents...
Page 3: Table Of Contents
Si04-402A 1. Introduction .....................v 1.1 Safety Cautions ..................v Part 1 List of Functions ..............1 1. List of Functions ..................2 Part 2 Specifications ..............3 1. Specifications ..................4 Part 3 Printed Circuit Board Connector Wiring Diagram ..........9 1. Printed Circuit Board Connector Wiring Diagram........10 1.1 Indoor Unit....................10 1.2 Outdoor Unit ...................12 Part 4...
Page 4 Si04-402A Part 5 System Configuration............41 1. System Configuration................42 2. Instruction....................43 2.1 Safety Precautions .................43 2.2 Names of Parts..................45 2.3 Preparation before Operation..............48 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........51 2.5 Adjusting the Air Flow Direction .............53 2.6 POWERFUL Operation ................55 2.7 OUTDOOR UNIT SILENT Operation .............56 2.8 INTELLIGENT EYE Operation ...............57...
Page 5 Si04-402A Part 7 Removal Procedure ............111 1. Indoor Unit...................112 1.1 Removal of Air Filter................112 1.2 Removal of Front Grille ................114 1.3 Removal of Assembly of Front Panel Mechanism........120 1.4 Removal of Lamp Cover...............124 1.5 Removal of Horizontal Blade..............125 1.6 Removal of Reduction Motor..............126 1.7 Removal of Outlet Grille ...............129 1.8 Removal of Vertical Blades and Swing Motor ........130 1.9 Removal of Electrical Box ..............134...
Page 6: Introduction
Si04-402A 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 Si04-402A 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
Si04-402A 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 Si04-402A 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
Si04-402A Part 1 Part 1 Part 1 Part 1 List of Functions List of Functions List of Functions List of Functions 1. List of Functions ..................2 List of Functions...
Page 11: List Of Functions
List of Functions Si04-402A 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 12: Part 2 Specifications
Si04-402A Part 2 Part 2 Part 2 Part 2 Specifications Specifications Specifications Specifications 1. Specifications ..................4 Specifications...
Page 13: Specifications
Specifications Si04-402A Specifications 230V, 50Hz Indoor Units FTXG25CVMAW FTXG25CVMAS Model RXG25CVMA RXG25CVMA Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.5) 2.5 (1.3~3.0) 3.4 (1.3~4.5) Capacity Btu/h 8,550 (4,450~10,250) 11,600 (4,450~15,350) 8,550 (4,450~10,250) 11,600 (4,450~15,350) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580)
Page 14 Si04-402A Specifications 230V, 50Hz Indoor Units FTXG25CVMBW FTXG25CVMBS Model RXG25CVMB RXG25CVMB Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3~3.0) 3.4 (1.3~4.5) 2.5 (1.3~3.0) 3.4 (1.3~4.5) Capacity Btu/h 8,550 (4,450~10,250) 11,600 (4,450~15,350) 8,550 (4,450~10,250) 11,600 (4,450~15,350) Rated (Min.~Max.) kcal/h 2,150 (1,120~2,580) 2,920 (1,120~3,870) 2,150 (1,120~2,580) 2,920 (1,120~3,870)
Page 15 Specifications Si04-402A 230V, 50Hz Indoor Units FTXG35CVMAW FTXG35CVMAS Model RXG35CVMA RXG35CVMA 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 11,950 (4,750~12,950) 14,300 (4,750~17,050) 11,950 (4,750~12,950) 14,300 (4,750~17,050) 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 16 Si04-402A Specifications 230V, 50Hz Indoor Units FTXG35CVMBW FTXG35CVMBS Model RXG35CVMB RXG35CVMB 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 11,950 (4,750~12,950) 14,300 (4,750~17,050) 11,950 (4,750~12,950) 14,300 (4,750~17,050) Rated (Min.~Max.) kcal/h 3,010 (1,200~3,270) 3,610 (1200~4,300) 3,010 (1,200~3,270) 3,610 (1200~4,300)
Page 17 Specifications Si04-402A 230V, 50Hz Indoor Units ATXG25CVMB ATXG35CVMB Model ARXG25CVMB ARXG35CVMB 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 8,550 (4,450~10,250) 11,600 (4,450~15,350) 11,950 (4,750~12,950) 14,300 (4,750~17,050) Rated kcal/h 2,150 (1,120~2,580) 2,920 (1,120~3,870) 3,010 (1,200~3,270) 3,610 (1200~4,300) Moisture Removal...
Page 18: Part 3 Printed Circuit Board
Si04-402A Part 3 Part 3 Part 3 Part 3 Printed Circuit Board Printed Circuit Board Printed Circuit Board Printed Circuit Board Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........10 1.1 Indoor Unit....................10 1.2 Outdoor Unit ...................12 Printed Circuit Board Connector Wiring Diagram...
Page 19: Printed Circuit Board Connector Wiring Diagram
Printed Circuit Board Connector Wiring Diagram Si04-402A 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors 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 control PCB Connector for reduction motor (front panel mechanism)
Page 20 Si04-402A Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) JA JC (R3319) PCB(2): Signal Receiver PCB RTH1 LED4 LED2 LED3 (R3320) PCB(3): INTELLIGENT EYE sensor PCB (R3321) Printed Circuit Board Connector Wiring Diagram...
Page 21: Outdoor Unit
Printed Circuit Board Connector Wiring Diagram Si04-402A Outdoor Unit Connectors Connector for filter PCB Connector for control PCB Connector for electronic expansion valve coil Connector for compressor motor Connector for overload protector Connector for fan motor Connector for four way valve coil Connector for thermistors (outdoor air, heat exchanger, discharge pipe) HC3, HC4, HL3, HN3...
Page 22 Si04-402A Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (outdoor unit) LEDA S90 FU2(3.15A) (R3322) FU1(3.15A) PCB(2): Filter PCB FU3(20A) (R3323) Printed Circuit Board Connector Wiring Diagram...
Page 23 Printed Circuit Board Connector Wiring Diagram Si04-402A Printed Circuit Board Connector Wiring Diagram...
Page 24: Part 4 Function And Control
Si04-402A Part 4 Part 4 Part 4 Part 4 Function and Control Function and Control Function and Control Function and Control 1. Main Functions..................16 1.1 Frequency Principle................16 1.2 Power-Airflow Flap, Wide-Angle Louvres and Auto-Swing ....18 1.3 Operation Starting Control..............19 1.4 Fan Speed Control for Indoor Units............20 1.5 Programme Dry Function ...............21 1.6 Automatic Operation................22 1.7 NIGHT SET Mode ..................23...
Page 25: Main Functions
Main Functions Si04-402A 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 26 Si04-402A 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 27: Power-Airflow Flap, Wide-Angle Louvres And Auto-Swing
Main Functions Si04-402A 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 28: Operation Starting Control
Si04-402A 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 29: Fan Speed Control For Indoor Units
Main Functions Si04-402A 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 77.
Page 30: Programme Dry Function
Si04-402A 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 31: Automatic Operation
Main Functions Si04-402A 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 32: Night Set Mode
Si04-402A 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. NIGHT SET The NIGHT SET circuit continues heating or cooling the room at the set temperature for the first Circuit one hour, then automatically lowers the temperature setting slightly in the case of cooling, or raises it slightly in the case of heating, for economical operations.
Page 33: Intelligent Eye
Main Functions Si04-402A 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 34: Inverter Powerful Operation
Si04-402A 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 35: Other Functions
Main Functions Si04-402A 1.10 Other Functions 1.10.1 Hot Start Function Heat Pump Only In order to prevent the cold air blast that normally comes when heating is started, the temperature of the heat exchanger of the indoor unit is detected, and either the air flow is stopped or is made very weak thereby carrying out comfortable heating of the room.
Page 36: Function Of Thermistor
Si04-402A Function of Thermistor 2. 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. Set a target discharge temperature depending on the outdoor and indoor heat exchanger Exchanger temperature.
Page 37: Control Specification
Control Specification Si04-402A 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 38: Frequency Control
Si04-402A 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 39: Controls At Mode Changing / Start-Up
Control Specification Si04-402A 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 40: Minutes Standby
Si04-402A Control Specification 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 41: Discharge Pipe Control
Control Specification Si04-402A 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 42: Freeze-Up Protection Control
Si04-402A Control Specification Freeze-up Protection Control Outline During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings. Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from...
Page 43: Fan Control
Control Specification Si04-402A 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 44: Defrost Control
Si04-402A Control Specification 3.10 Defrost Control Outline Heat Pump Only Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing. Detail Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature.
Page 45: Electronic Expansion Valve Control
Control Specification Si04-402A 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 46: Discharge Pipe
Si04-402A Control Specification 3.11.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 3.11.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
Page 47: Discharge Pipe Temperature Control
Control Specification Si04-402A 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 48: Malfunctions
Si04-402A Control Specification 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction may occur in the thermistor. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Outdoor air thermistor 3.12.2 Detection of Overload Over Current Outline In order to protect the inverter, detect an excessive output current, and for protecting...
Page 49: Forced Operation Mode
Control Specification Si04-402A 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 50: Part 5 System Configuration
Si04-402A Part 5 Part 5 Part 5 Part 5 System Configuration System Configuration System Configuration System Configuration 1. System Configuration................42 2. Instruction....................43 2.1 Safety Precautions .................43 2.2 Names of Parts..................45 2.3 Preparation before Operation..............48 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........51 2.5 Adjusting the Air Flow Direction .............53 2.6 POWERFUL Operation ................55 2.7 OUTDOOR UNIT SILENT Operation .............56...
Page 51: System Configuration
System Configuration Si04-402A 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 52: 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 top front panel or the bottom front panel.
Page 53: Installation Site
Instruction Si04-402A • 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 54: Names Of Parts
Si04-402A Instruction Names of Parts I Indoor Unit (With the panel closed) System Configuration...
Page 55: I Outdoor Unit
Instruction Si04-402A I Outdoor Unit I I I I Indoor Unit 1. Air filter • The operation mode refers to the following table. 2. Titanium Apatite Photocatalytic Temperature Air flow Air-Purifying Filter: Mode setting rate • These filters are attached to the inside of FTXG AUTO 25°C AUTO...
Page 56: Remote Controller
Si04-402A Instruction I Remote Controller < > ARC433A41 1. Signal transmitter: 8. SILENT button: for OUTDOOR UNIT • It sends signals to the indoor unit. SILENT operation (page 15.) 2. Display: 9. FAN setting button: • It displays the current settings. •...
Page 57: Preparation Before Operation
Instruction Si04-402A Preparation before Operation I To set the batteries Position + and – correctly! 1. Press with a finger and slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION I I I I About batteries •...
Page 58 Si04-402A Instruction I To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote controller, such as a curtain, the unit will not operate. •...
Page 59 Instruction Si04-402A I To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. Holding down “ ” or “ ” button rap- idly increases or decreases the time dis- play.
Page 60: Auto · Dry · Cool · Heat · Fan Operation
Si04-402A Instruction AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode. I To start operation 1.
Page 61 Instruction Si04-402A I To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ”...
Page 62: Adjusting The Air Flow Direction
Si04-402A Instruction Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. I To adjust the horizontal blade (flap) 1. Press “SWING button ”. • “ ” is displayed on the LCD. 2. When the flap has reached the desired position, press “SWING button ”...
Page 63 Instruction Si04-402A I 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 64: Powerful Operation
Si04-402A Instruction POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity . I To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used before POWERFUL operation.
Page 65: Outdoor Unit Silent Operation
Instruction Si04-402A 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. I To start OUTDOOR UNIT SILENT operation 1.
Page 66: Intelligent Eye Operation
Si04-402A Instruction INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. I To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. I To cancel the INTELLIGENT EYE operation 1, 2 2.
Page 67 Instruction Si04-402A “INTELLIGENT EYE” is useful for Energy Saving I I I I 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 68: Timer Operation
Si04-402A Instruction TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. I To use OFF TIMER operation •...
Page 69 Instruction Si04-402A I To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time (page 9.). 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.
Page 70: Care And Cleaning
Si04-402A Instruction 2.10 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 I Indoor unit, Outdoor unit and Remote controller 1.
Page 71: I Air Filter
Instruction Si04-402A Filters 1. Open the top front panel. • Open the top front panel by placing a finger on the panel tab on either side of the top front panel and then secure it using the supporting plate on the right. 2.
Page 72: Before A Long Idle Period
Si04-402A Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation. •...
Page 73: Troubleshooting
Instruction Si04-402A 2.11 Troubleshooting These cases are not troubles. The following cases are not air conditioner troubles but have some reasons. You may just continue using it. Case Explanation Operation does not start soon. • This is to protect the air conditioner. •...
Page 74: Check Again
Si04-402A 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 75: Disposal Requirements
Instruction Si04-402A Call the service shop immediately. WARNING I When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner. I Do not attempt to repair or modify the air conditioner by yourself.
Page 76: Part 6 Service Diagnosis
Si04-402A Part 6 Part 6 Part 6 Part 6 Service Diagnosis Service Diagnosis Service Diagnosis Service Diagnosis 1. Caution for Diagnosis................68 2. Problem Symptoms and Measures ............69 3. Service Check Function ................70 4. Troubleshooting ..................73 4.1 Error Codes and Description ..............73 4.2 Indoor Unit PCB Abnormality ..............74 4.3 Freeze-up Protection Control or High Pressure Control......75 4.4 Fan Motor (DC Motor) or Related Abnormality........77...
Page 77: Caution For Diagnosis
Caution for Diagnosis Si04-402A 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 78: Problem Symptoms And Measures
Si04-402A 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 79: Service Check Function
Service Check Function Si04-402A 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 80 Si04-402A 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 81 Service Check Function Si04-402A 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 82: Troubleshooting
Si04-402A 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 83: Indoor Unit Pcb Abnormality
Troubleshooting Si04-402A 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 Faulty terminal strip of indoor unit...
Page 84: Freeze-Up Protection Control Or High Pressure Control
Si04-402A 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 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 85 Troubleshooting Si04-402A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Refer to P.106 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 86: Fan Motor (Dc Motor) Or Related Abnormality
Si04-402A Troubleshooting Fan Motor (DC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction When the detected rotation speed is less than 50% of the HH tap under maximum fan motor rotation demand.
Page 87 Troubleshooting Si04-402A 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.104 and rotate fan by hand. Does fan rotate Replace fan motor. smoothly? Turn power ON and operate fan.
Page 88: Thermistor Or Related Abnormality (Indoor Unit)
Si04-402A 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 89: Front Panel Open / Close Fault
Troubleshooting Si04-402A 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 Causes Malfunction or deterioration of the front panel mechanism Malfunction of the limit switch Troubleshooting Be sure to turn off power switch before connect or disconnect connector,...
Page 90: Signal Transmission Error (Between Indoor And Outdoor Unit)
Si04-402A 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 91: Signal Transmission Error (Between Indoor Unit And Wired Remote Controller )
Troubleshooting Si04-402A 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 92: Unspecified Voltage (Between Indoor And Outdoor Unit)
Si04-402A Troubleshooting Unspecified Voltage (between Indoor and Outdoor Unit) Remote Controller Display Method of The supply power is detected for its requirements (different from separate type and multi type) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction The separate type and multi type are interconnected. Decision Conditions Supposed...
Page 93: Outdoor Unit Pcb Abnormality
Troubleshooting Si04-402A 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 94: Ol Activation (Compressor Overload)
Si04-402A 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 95: Compressor Lock
Troubleshooting Si04-402A 4.12 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 96: Dc Fan Lock
Si04-402A 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 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 97: Input Over Current Detection
Troubleshooting Si04-402A 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 Malfunction running. Detection Malfunction The following current with the compressor running continues for 2.5 seconds. Cooling Heating: Above 12A Decision...
Page 98: Four Way Valve Abnormality
Si04-402A 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 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 99 Troubleshooting Si04-402A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.5 Refer to P.105 Four way valve coil Correct. disconnected (loose)? Check No.6 Refer to P.106 Reconnect. Harness out of connector? Check No.11 Refer to P.109...
Page 100: Discharge Pipe Temperature Control
Si04-402A 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 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 101: High Pressure Control In Cooling
Troubleshooting Si04-402A 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 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 102 Si04-402A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Refer to P.104 Check the installation space. Check No.6 Check No.7 Abnormal Refer to P.106 Installation condition Change the air outlet grille check position.
Page 103: Sensor Abnormality Around Compressor System
Troubleshooting Si04-402A 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 104: Position Sensor Abnormality
Si04-402A Troubleshooting 4.19 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 105: Dc Voltage / Current Sensor Abnormality
Troubleshooting Si04-402A 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 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 106: Thermistor Or Related Abnormality (Outdoor Unit)
Si04-402A 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. 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 107 Troubleshooting Si04-402A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Refer to P.106 Turn on the power again. Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.
Page 108: Output Over Current Detection
Si04-402A 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 109 Troubleshooting Si04-402A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.7 ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.107 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.
Page 110: Insufficient Gas
Si04-402A Troubleshooting 4.23 Insufficient Gas Remote Controller Display Method of Gas shortage detection I : A gas shortage is detected by checking the compressor running Malfunction frequency. Gas shortage detection II : A gas shortage is detected by checking the difference between Detection indoor unit heat exchanger temperature and room temperature as well as the difference between outdoor unit heat exchanger temperature and room temperature.
Page 111 Troubleshooting Si04-402A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Refer to P.104 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.6 * Room temperature thermistor * Outdoor air thermistor...
Page 112: Over-Voltage Detection
Si04-402A 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 113: Check
Check Si04-402A 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 114: Four Way Valve Performance Check
Si04-402A Check 5.1.3 Four Way Valve Performance Check Check No.5 Turn off the power and turn it on again. ∗ Four way valve coil Cooling / dry : No continuity Start the heating-mode run. Heating : Continuity S80 voltage at DC 180-220 V with Replace the outdoor unit compressor on? PCB.
Page 115: Thermistor Resistance Check
Check Si04-402A 5.1.4 Thermistor Resistance Check Check No.6 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.
Page 116: Installation Condition Check
Si04-402A Check 5.1.5 Installation Condition Check Check No.7 Installation condition check Check the allowable Abnormal Change the position of the air dimensions of the air suction discharge grille or the and discharge area. installation location. Normal Does the discharged air from other outdoor Change the position of the air unit cause an increase of discharge grille or the...
Page 117: Discharge Pressure Check
Check Si04-402A 5.1.6 Discharge Pressure Check Check No.8 Discharge pressure check High Replace compessor. Open the stop valve. Is the stop valve open? Is the Replace the pipe installed at connection pipe deformed? the site. At the heat exchanger and Clean.
Page 118: Power Supply Waveforms Check
Si04-402A 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 119: Power Transistor Check
Check Si04-402A 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 120: Part 7 Removal Procedure
Si04-402A Part 7 Part 7 Part 7 Part 7 Removal Procedure Removal Procedure Removal Procedure Removal Procedure 1. Indoor Unit...................112 1.1 Removal of Air Filter................112 1.2 Removal of Front Grille ................114 1.3 Removal of Assembly of Front Panel Mechanism........120 1.4 Removal of Lamp Cover...............124 1.5 Removal of Horizontal Blade..............125 1.6 Removal of Reduction Motor..............126 1.7 Removal of Outlet Grille ...............129...
Page 121: Indoor Unit
Indoor Unit Si04-402A 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 When the signal receiver catches a signal from the remote controller, it produces beep sound and the operation lamp blinks.
Page 122 Si04-402A Indoor Unit Step Procedure Points 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 123: Removal Of Front Grille
Indoor Unit Si04-402A 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 124 Si04-402A Indoor Unit Step Procedure Points When reassembling, fit Hooks the 4 hooks on the Caution upper side and insert Fit the hooks securely, or the the both sides hooks slot-in panel gets caught in while rotating the the decorative plate and the decorative plate.
Page 125 Indoor Unit Si04-402A Step Procedure Points 3. Remove the service cover. The service cover has no Bend the service cover screw. inside and release the hooks. The service cover has 2 hooks on the right side and 4 hooks on the lower side.
Page 126 Si04-402A Indoor Unit Step Procedure Points 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 127 Indoor Unit Si04-402A Step Procedure Points 4. Remove the front grille. The front grille has no screw inside flaps. Loosen the 5 screws. The front grille has 3 A section hooks on the upper side. (R3783) B section A section C section (R3784) B section...
Page 128 Si04-402A Indoor Unit Step Procedure Points Lift the upper part of the Be careful not to cut your front grille and release finger by the fins of the heat the hooks. exchanger. Release the center As for the horizontal blades, hook first.
Page 129: Removal Of Assembly Of Front Panel Mechanism
Indoor Unit Si04-402A 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 130 Si04-402A Indoor Unit Step Procedure Points Loosen the 2 screws of the assembly (right). Remove the assembly. When reassembling, insert the lower rack plate first. The assembly has marks for right or left. R..Right L ..Left Removal Procedure...
Page 131 Indoor Unit Si04-402A Step Procedure Points 2. Remove the lower rack plate. Loosen the 2 screws of the left assembly cover. Hold the assembly hori- When you demand small zontally and release the parts like cogs and rollers, hook. order a set of assembly. Pay attention so as not to lose the rollers.
Page 132 Si04-402A Indoor Unit Step Procedure Points Lift and remove the When reassembling align cog. the arrow with the mark2of the center cog. Loosen the 2 screws of the right assembly cover. Hold the assembly hori- When you demand small zontally and release the parts like cogs and rollers, hook.
Page 133: Removal Of Lamp Cover
Indoor Unit Si04-402A 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 134: Removal Of Horizontal Blade
Si04-402A Indoor Unit 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 135: Removal Of Reduction Motor
Indoor Unit Si04-402A 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. Loosen the screw.
Page 136 Si04-402A Indoor Unit Step Procedure Points 2. Remove the reduction motor. Release the hook and open the assembly. Layout of the harness of the motor Removal Procedure...
Page 137 Indoor Unit Si04-402A Step Procedure Points Remove the cog (large). Lift and remove the reduction motor. Pull and disconnect the connector for the motor. Removal Procedure...
Page 138: Removal Of Outlet Grille
Si04-402A 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 139: Removal Of Vertical Blades And Swing Motor
Indoor Unit Si04-402A 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 140 Si04-402A Indoor Unit Step Procedure Points 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 141 Indoor Unit Si04-402A Step Procedure Points 2. Remove the swing motor. Disconnect the connector for the swing motor. Loosen the screw and remove the swing motor. Strip the fixing tape. Removal Procedure...
Page 142 Si04-402A Indoor Unit Step Procedure Points Loosen the screw and pull out the swing motor. Disconnect the connector for the swing motor. Removal Procedure...
Page 143: Removal Of Electrical Box
Indoor Unit Si04-402A 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. 1. Remove the electrical box. Discharge the static electricity from your body before touching the electrical parts like signal receiver...
Page 144 Si04-402A Indoor Unit Step Procedure Points Lift and remove the drip When reassembling, insert proof plate. the left hook of the drip proof plate into the hem plate of the heat exchanger. Twist the electrical box cover to the right slightly to release the lower hook.
Page 145 Indoor Unit Si04-402A Step Procedure Points Loosen the screw of the earth. 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.
Page 146 Si04-402A Indoor Unit Step Procedure Points Release the harness from the hook. 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.
Page 147 Indoor Unit Si04-402A Step Procedure Points Release the thermistor When reassembling, hang lead wire from the hook. the excessive lead wire of the heat exchanger thermistor on the hook. Layout of the lead wire for the heat exchanger thermistor Loosen the screw of the electrical box.
Page 148 Si04-402A Indoor Unit Step Procedure Points Tilt the front part of the electrical box to the right slightly and pull it out. When reassembling, push the electrical box upright and make sure to fit the hook on the backside. Removal Procedure...
Page 149: Removal Of Pcb
Indoor Unit Si04-402A 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 150 Si04-402A Indoor Unit Step Procedure Points Loosen the screws of the earth. Release the front hook and the 2 upper hooks, and remove the shelter. Removal Procedure...
Page 151 Indoor Unit Si04-402A Step Procedure Points Layout of the wiring Loosen the screw and pull out the terminal board. Removal Procedure...
Page 152 Si04-402A Indoor Unit Step Procedure Points 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 153 Indoor Unit Si04-402A Step Procedure Points Release the hooks and draw out the harness from the ditch. Loosen the 2 screws and remove the PCB. Control PCB Removal Procedure...
Page 154 Si04-402A Indoor Unit Step Procedure Points 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 155: Removal Of Heat Exchanger
Indoor Unit Si04-402A 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 156 Si04-402A Indoor Unit Step Procedure Points 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 157 Indoor Unit Si04-402A Step Procedure Points 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 158: Removal Of Fan Rotor And Fan Motor
Si04-402A 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 159 Indoor Unit Si04-402A Step Procedure Points 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 160 Si04-402A Indoor Unit Step Procedure Points 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 161: Outdoor Unit
Outdoor Unit Si04-402A 2. Outdoor Unit Removal of Panels and Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Features Take care not to cut your finger by the fins of the heat exchanger.
Page 162 Si04-402A Outdoor Unit Step Procedure Points 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 163 Outdoor Unit Si04-402A Step Procedure Points Undo the hooks. The front panel has 4 hooks. Pull and remove the The fan motor is united with front panel. the front panel. 3. Remove the fan motor. The screw has reverse winding. Unscrew the washer- fitted nut (M10) of the propeller fan with a...
Page 164 Si04-402A Outdoor Unit Step Procedure Points Loosen the 2 screws and lift the bell mouth to undo the hooks. Remove the bell mouth. Loosen the fixing hooks Put the lead wire through the and release the lead back of the motor when wire.
Page 165 Outdoor Unit Si04-402A Step Procedure Points 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 166 Si04-402A Outdoor Unit Step Procedure Points 4. Remove the right side panel. Loosen the 2 screws on the rear side. Loosen the 3 screws on the right side. Loosen the screw and lift the connection port to remove. Removal Procedure...
Page 167 Outdoor Unit Si04-402A Step Procedure Points When reassembling, make sure to fit the hook. Removal Procedure...
Page 168: Removal Of Electrical Box
Si04-402A 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 169 Outdoor Unit Si04-402A Step Procedure Points Release the discharge Pay attention so as not to pipe thermistor. lose the clip for thermistor. Release the heat Pay attention so as not to exchanger thermistor. lose the clip. Lift and remove the electrical box.
Page 170: Removal Of Reactor And Partition Plate
Si04-402A 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 171 Outdoor Unit Si04-402A Step Procedure Points The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. When reassembling, fit the lower hook into the bottom frame. Removal Procedure...
Page 172: Removal Of Sound Blanket
Si04-402A 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 173 Outdoor Unit Si04-402A Step Procedure Points Pull the sound blanket Since the piping ports on the (inner) out. sound blanket are torn easily, remove the blanket carefully. Pull the sound blanket (bottom) out. Removal Procedure...
Page 174: Removal Of Four Way Valve
Si04-402A 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 175 Outdoor Unit Si04-402A Step Procedure Points Remove the sheets of putty. Cut the pipe with a tube cutter. Heat up the brazed part Provide a protective sheet or and withdraw the piping a steel plate so that the with pliers. brazing flame cannot influence peripheries.
Page 176: Removal Of Compressor
Si04-402A 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 177 Outdoor Unit Si04-402A Step Procedure Points Heat up the brazed part of the suction side and disconnect. Lift the compressor up and remove it. Removal Procedure...
Page 178: Removal Of Pcb
Si04-402A 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 179 Outdoor Unit Si04-402A Step Procedure Points Loosen the 4 screws. Undo the 3 hooks on the upper side. Lift and pull out the PCB. Removal Procedure...
Page 180 Si04-402A Outdoor Unit Step Procedure Points Feature of the PCB S70: fan motor S80: four way valve S90: thermistor (outdoor air, heat exchanger, discharge pipe) Removal Procedure...
Page 181 Outdoor Unit Si04-402A Removal Procedure...
Page 182: Part 8 Others
Si04-402A Part 8 Part 8 Part 8 Part 8 Others Others Others Others 1. Others ....................174 1.1 Test Run from the Remote Controller ..........174 1.2 Jumper Settings ...................175 Others...
Page 183: Others
Others Si04-402A 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 184: Jumper Settings
Si04-402A 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 185 Others Si04-402A Others...
Page 186: Part 9 Appendix
Si04-402A Part 9 Part 9 Part 9 Part 9 Appendix Appendix Appendix Appendix 1. Piping Diagrams..................178 2. Wiring Diagrams..................179 Appendix...
Page 187: Piping Diagrams
Piping Diagrams Si04-402A Piping Diagrams FTXG25/35CVMAW(S), FTXG25/35CVMBW(S), ATXG25/35CVMB INDOOR UNIT HEAT EXCHANGER 7.0CuT 7.0CuT THERMISTOR 7.0CuT ON HEAT EXCH. 7.0CuT CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) FAN MOTOR 9.5 CuT FIELD PIPING ( 9.5CuT ) REFRIGERANT FLOW COOLING HEATING 4D045301A RXG25/35CVMA, RXG25/35CVMB, ARXG25/35CVMB...
Page 188: Wiring Diagrams
Si04-402A Wiring Diagrams Wiring Diagrams FTXG25/35CVMAW(S), FTXG25/35CVMBW(S), ATXG25/35CVMB PCB2 LED4 LED3 LED2 SIGNAL RECEIVER WIRELESS t ˚ REMOTE CONTROLLER FIELD WIRING. PCB3 PCB1 TRANSMISSION CIRCUIT outdoor INTELLIGENT- EYE SENSOR CAUTION GRN/YLW NOTE THAT OPERATION WILL 3.15A RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS RECTIFIER GRN/YLW TURNED OFF AND THEN BACK...
Page 189 Wiring Diagrams Si04-402A Appendix...
Page 190: Index
Si04-402A Index Index Index Index Numerics reduction motor ..........137 signal receiver PCB ........143 00 ................73 swing motors ..........136 3-D airflow ..............18 control PCB (indoor unit) ......... 11, 74 3-minutes standby ..........26, 31 control PCB (outdoor unit) ..... 13, 144, 169 cover lamp cover ............
Page 191 Si04-402A J6 ..............97 HA ................. 10 L5 ..............99 Hall IC ............. 20, 77 U0 ..............101 HC3 ............... 12 U2 ..............103 HC4 ............... 12 U4 ..............81 heat exchanger ........... 148 U5 ..............82 heat exchanger thermistor ..27, 79, 98, 137, 160 UA ..............83 heating peak-cut control ........
Page 192 Si04-402A night set mode ............23 reduction motor, connector ......... 137 remote controller ........... 70 right side panel ............ 157 OL activation ............85 right side plate ............. 149 ON/OFF button on Indoor unit ........26 room temperature thermistor ......... 79 operation lamp ............68 RTH1 ..............
Page 193 Si04-402A timer operation ............59 titanium apatite photocatalytic air-purifying filter ..............26, 113 top panel ..............153 troubleshooting ..........64, 73 troubleshooting with led indication ......68 turning speed pulse input on the outdoor unit PCB check ............110 U0 .................101 U2 .................103 U4 ................81 U5 ................82 UA ................83 unspecified voltage ..........83 V1 ..............10, 12...
Page 194 Si04-402A Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts inverter powerful operation ........25 inverter units refrigerant system check ....109 ARC433A series ............70 automatic air flow control ........20 automatic operation ..........22 jumper settings ............
Page 195 Si04-402A turning speed pulse input on the outdoor unit PCB check ............110 unspecified voltage ..........83 wiring diagrams ARXG25/35CVMB .........179 ATXG25/35CVMB .........179 FTXG25/35CVMAW(S) .........179 FTXG25/35CVMBW(S) .........179 RXG25/35CVMA ...........179 RXG25/35CVMB ...........179 Drawings & Flow Charts...
Page 196 2-chome, Kita-ku, Osaka, 530-8323 Japan Tokyo Office: JR Shinagawa East Bldg., 18-1, Konan 2-chome, Minato-ku, Tokyo, 108-0075 Japan http://www.daikin.com/global/ All rights reserved The specifications, designs, and information in this brochure are subject to change without notice. Printed in Singapore 07/2004 AK COS...

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Daikin FTXG25CVMAW Service Manual

Part 1 List of Functions

Part 2 Specifications

Part 3 Printed Circuit Board

Part 4 Function and Control

Part 5 System Configuration

Part 6 Service Diagnosis

Part 7 Removal Procedure

Part 8 Others

Part 9 Appendix

Index