Page 1 Si01-406 Инструкция по обслуживанию SPLIT Pair C-Series [Applied Models] Non-Inverter Pair : Cooling Only Non-Inverter Pair : Heat Pump...
Page 2 Si01-406 Non Inverter Pair Non Inverter Pair Non Inverter Pair Non Inverter Pair C-Series C-Series C-Series C-Series Cooling Only Indoor Unit FT25CV1A FT35CV1A FT50CV1A FT60CV1A Outdoor Unit R25CV1A R35CV1A R50CV1A R60CV1A Heat Pump Indoor Unit FTY25CVMA FTY35CVMA Outdoor Unit RY25CVMA...
Page 3: Table Of Contents
Si01-406 1. Introduction ................... vii 1.1 Safety Cautions ..................vii Part 1 List of Function ..............1 1. 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 FT25/35CV1A..................12 1.2 FT50/60CV1A..................14 1.3 FTY25/35CVMA ..................16...
Page 4 Si01-406 3.8 Liquid Compression Protection Function 1 (Securing of Differential Pressure and Blown Air Temperature) ....45 3.9 Liquid Compression Protection Function 2..........46 3.10 Defrost Control ..................46 3.11 Insufficient Gas Control ................47 3.12 Forced Operation Mode .................48 3.13 Additional Function.................48 Part 5 System Configuration............49 1.
Page 5 Si01-406 5.3 Thermistor Resistance Check ..............116 5.4 Installation Condition Check..............117 5.5 Discharge Pressure Check..............118 5.6 Outdoor Unit Fan System Check............119 5.7 Power Supply Waveforms Check............119 5.8 Inverter Units Refrigerant System Check ..........120 5.9 Capacitor Voltage Check..............120 5.10 Power Transistor Check ...............121 5.11 Hall IC Check ..................122 5.12 Power Transistor Output Check ............123 5.13 Inverter Units Compressor / Refrigerant System Check ......124...
Page 6 Si01-406 2. Wiring Diagrams..................190 2.1 Indoor Units ..................190 2.2 Outdoor Units ..................191 Index ..................... i Drawings & Flow Charts ..............v Table of Contents...
Page 7 Si01-406 Table of Contents...
Page 8: Introduction
Si01-406 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 9: Cautions Regarding Products After Repair
Introduction Si01-406 Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.
Page 10: Inspection After Repair
Si01-406 Introduction Warning Be sure to use the specified cable to connect between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals. Improper connections can cause excessive heat generation or fire.
Page 11: Using Icons
Introduction Si01-406 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 12: Part 1 List Of Function
Si01-406 Part 1 Part 1 Part 1 Part 1 List of Function List of Function List of Function List of Function 1. Functions....................2 List of Function...
Page 13: Functions
Functions Si01-406 1. Functions Category Functions Category Functions Inverter — — (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — Virustatic Functions 19.4 19.4 Operation Limit for Cooling (°CDB) Basic Function Operation Limit for Heating (°CWB) — — Photocatalytic Deodorizing Filter —...
Page 14 Si01-406 Functions Category Functions Category Functions Inverter (with Inverter Power Control) — Air Purifying Filter with Bacteriostatic, — Virustatic Functions Operation Limit for Cooling (°CDB) Basic Function –10 Operation Limit for Heating (°CWB) Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic PAM Control —...
Page 15 Functions Si01-406 List of Function...
Page 16: Part 2 Specifications
Si01-406 Part 2 Part 2 Part 2 Part 2 Specifications Specifications Specifications Specifications 1. Specifications ..................6 Specifications...
Page 17: Specifications
Specifications Si01-406 1. Specifications 220-230-240V 50Hz Indoor Units FT25CV1A FT35CV1A Model Outdoor Units R25CV1A R35CV1A 2.64 3.52 Capacity Btu/h 9,000 12,000 kcal/h 2,270 3,000 Moisture Removal Running Current 3.95-4.00-4.10 5.58-5.60-5.62 Power Consumption 817-843-868 1,135-1,170-1,200 Power Factor 94.0-91.6-88.2 92.5-90.8-89.0 3.23-3.13-3.04 3.10-3.01-2.93 φ...
Page 18 Si01-406 Specifications 220-230-240V 50Hz Indoor Units FT50CV1A FT60CV1A Models Outdoor Units R50CV1A R60CV1A Capacity Btu/h 18,100 22,500 kcal/h 4,560 5,680 Moisture Removal Running Current 7.4-7.3-7.2 11.0-10.9-10.8 Power Consumption 1,600 2,390 Power Factor 98.3-95.3-92.6 98.8-95.3-92.2 3.31 2.76 φ φ Liquid Piping φ...
Page 19 Specifications Si01-406 220-230-240V 50Hz Indoor Units FTY25CVMA FTY35CVMA Models RY25CVMA RY35CVMA Outdoor Units Cooling Heating Cooling Heating 2.54 3.60 Capacity Btu/h 8,700 11,600 12,300 14,300 kcal/h 2,190 2,920 3,100 3,600 Moisture Removal — — Running Current Power Consumption 1,100 1,360 1,340 Power Factor 80.2-76.7-73.5...
Page 20 Si01-406 Specifications The data on the conditions (AS/NZS3823.1) : FTY25CVMA FTY35CVMA (Rated) Cooling Heating Cooling Heating Capacity Running Current Power Consumption 1,090 1,485 1,500 2.60 3.12 2.36 2.80 (Conditions) Standard Cooling Heating Piping Length Power Supply Indoor ; 27°CDB/19°CWB Indoor ; 20°CDB AS/NZS3823.1 7.5m 50Hz 230V...
Page 21 Specifications Si01-406 Specifications...
Page 22: Part 3 Printed Circuit Board Connector Wiring Diagram
Si01-406 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........12 1.1 FT25/35CV1A..................12 1.2 FT50/60CV1A..................14 1.3 FTY25/35CVMA ..................16...
Page 23: Printed Circuit Board Connector Wiring Diagram
Printed Circuit Board Connector Wiring Diagram Si01-406 Printed Circuit Board Connector Wiring Diagram FT25/35CV1A Connectors 1) S1 Connector for fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S7 Connector for fan motor (Hall IC) 4) S21 Connector for centralized control (HA) 5) S26...
Page 24 Si01-406 Printed Circuit Board Connector Wiring Diagram Control PCB Signal Receiver PCB Control PCB Signal receiver PCB LED1 LED2 RTH1 5V Check 12V Check 2P058891L Printed Circuit Board Connector Wiring Diagram...
Page 25: Ft50/60Cv1A
Printed Circuit Board Connector Wiring Diagram Si01-406 FT50/60CV1A Connectors 1) S1 Connector for fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S21 Connector for centralized control (HA) 4) S26, S37 Connector for buzzer PCB 5) S27, S29 Connector for control PCB 6) S28 Connector for signal receiver PCB...
Page 26 Si01-406 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB C : 2P099167 PCB(2): Signal Receiver PCB PCB(3): Buzzer PCB (R2861) RTH1 (R2862) PCB(4): Display PCB LED1 LED2 (R3087) Printed Circuit Board Connector Wiring Diagram...
Page 27: Fty25/35Cvma
Printed Circuit Board Connector Wiring Diagram Si01-406 FTY25/35CVMA Connectors 1) S1 Connector for fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S7 Connector for fan motor (Hall IC) 4) S21 Connector for centralized control (HA) 5) S26 Connector for signal receiver PCB 6) S27 Connector for control PCB...
Page 28 Si01-406 Printed Circuit Board Connector Wiring Diagram Control PCB Signal Receiver PCB Control PCB LED1 Signal receiver PCB LED2 RTH1 C:2P084366L Printed Circuit Board Connector Wiring Diagram...
Page 29: Ry25/35Cvma
Printed Circuit Board Connector Wiring Diagram Si01-406 RY25/35CVMA Connectors 1) S10 Connector for PCB (2) 2) S11 Connector for PCB (1) (filter PCB) 3) S45 Connector for terminal board 4) S70 Connector for fan motor 5) S80 Connector for four way valve coil 6) S90 Connector for outdoor temperature thermistor / heat exchanger thermistor 7) S91...
Page 30 Si01-406 Printed Circuit Board Connector Wiring Diagram Detail of PCB (1) Connect to S11 on PCB (2) C:3P100242-1B Detail of PCB (2) C:2P100238-7F Printed Circuit Board Connector Wiring Diagram...
Page 31 Printed Circuit Board Connector Wiring Diagram Si01-406 Printed Circuit Board Connector Wiring Diagram...
Page 32: Part 4 Functions And Control
Si01-406 Part 4 Part 4 Part 4 Part 4 Functions and Control Functions and Control Functions and Control Functions and Control 1. Functions of Cooling Only Models ............22 1.1 Cooling Monitoring Function..............22 1.2 Programme Dry Function ...............23 1.3 Freeze-up Protection Control ..............24 1.4 Air Flow Rate Control ................25 1.5 Power-Airflow Dual Flaps, Wide-Angle Louvers, and Auto-Swing ..25 1.6 Signal Receiving Sign ................26...
Page 33: Functions Of Cooling Only Models
Functions of Cooling Only Models Si01-406 1. Functions of Cooling Only Models Cooling Monitoring Function Monitoring function is activated while cooling and dry operation are suspended. Compressor ON Compressor OFF 〈B〉 Differential 〈A〉 or less or more or less (R1882) : Compressor recycling guard timer (3-minute timer) : 5-minute timer : 4-minute timer...
Page 34: Programme Dry Function
Si01-406 Functions of Cooling Only Models Programme Dry Function By the function of the microcomputer, programme dry operation reduces the humidity keeping the temperature in a minimum drop. Room temperature and air flow rate can not be controlled by the adjusting buttons because they are controlled automatically. When the programme dry function starts, dry operation is provided, and then it repeats 6-minute suspension and 4-minute dry operation alternately.
Page 35: Freeze-Up Protection Control
Functions of Cooling Only Models Si01-406 Freeze-up Protection Control When the indoor heat exchanger temperature falls below 3°C in cooling or in dry operation, the compressor and the outdoor fan are forced to turn OFF. the indoor fan rotates at the L tap (in cooling operation) or LL tap (in dry operation). Note that this function is not activated for 6 minutes after compressor turns ON.
Page 36: Air Flow Rate Control
Si01-406 Functions of Cooling Only Models Air Flow Rate Control In cooling operation, if automatic setting has been selected for air flow rate, the wind flow is determined according to the room temperature and the set temperature. +2.5˚C Difference between room +2.0˚C and set temperature +1.5˚C...
Page 37: Signal Receiving Sign
Functions of Cooling Only Models Si01-406 Signal Receiving Sign When the indoor unit receives a signal from the remote controller, the unit emits a signal receiving sound. ON / OFF Button on Indoor Unit The unit can be turned ON by the button on the front panel. This is convenient when the remote controller cannot be found or when the batteries are exhausted.
Page 38: Night Set Mode
Si01-406 Functions of Cooling Only Models Night Set Mode This mode automatically keeps temperature slightly higher than the temperature setting. In this way, there is no need to worry about overcooling while sleeping, and it also saves on electricity. Set the OFF timer. The unit will cool the room at the set temperature for 1 hour from when the timer starts counting.
Page 39: Auto-Restart Function
Functions of Cooling Only Models Si01-406 1.12 Auto-restart Function If there is a power cut when the unit is operating, it will automatically resume the same operating mode when the power is restored. Note: It takes 3 minutes to restart the operation because the 3-minute standby function is activated. Store Data Power ON/OFF Operation mode...
Page 40: Functions Of Heat Pump Models
Si01-406 Functions of Heat Pump Models 2. Functions of Heat Pump 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 Additional...
Page 41 Functions of Heat Pump Models Si01-406 Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outdoor air temperature and cooling / heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables a quick set temperature.
Page 42: Power-Airflow Dual Flaps, Wide-Angle Louvers And Auto-Swing
Si01-406 Functions of Heat Pump Models Power-Airflow Dual Flaps, Wide-Angle Louvers and Auto-Swing Power-Airflow The large flaps send a large volume of air downwards to the floor. The flap provides an optimum Dual Flaps control area in cooling, heating and dry mode. Heating Mode During heating mode, the large flap enables direct warm air straight downwards.
Page 43: Fan Speed Control For Indoor Units
Functions of Heat Pump Models Si01-406 Fan Speed Control for Indoor Units Control Mode The air flow 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 troubleshooting for fan motor on page 90.
Page 44: Programme Dry Function
Si01-406 Functions of Heat Pump Models 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 45: Automatic Operation
Functions of Heat Pump Models Si01-406 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 46: Night Set Mode
Si01-406 Functions of Heat Pump Models Night Set Mode When the OFF timer is set, the Night Set circuit automatically activates. The Night Set circuit maintains the airflow setting made by users. The Night Set The Night Set circuit continues heating or cooling the room at the set temperature for the first one hour, then automatically raises the temperature setting slightly in the case of heating, or Circuit lowers it slightly in the case of cooling, for economical operations.
Page 47: Powerful Operation
Functions of Heat Pump Models Si01-406 Powerful Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed. Details of the When Powerful button is pushed in each operation mode, the fan speed / setting temperature will be converted to the following states in a period of twenty minutes.
Page 48: Other Functions
Si01-406 Functions of Heat Pump Models Other Functions 2.8.1 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 49: Function Of Thermistor
Functions of Heat Pump Models Si01-406 Function of Thermistor 2.9.1 Heat Pump Model Four way valve Compressor (R3070) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for high pressure protection during cooling operation. Exchanger Thermistor (DCB) Indoor Heat 1.
Page 50: Control For Heat Pump Models
Si01-406 Control for Heat Pump Models 3. Control for Heat Pump Models 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 Heat pump model There are following modes;...
Page 51: Frequency Control
Control for Heat Pump Models Si01-406 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 52 Si01-406 Control for Heat Pump Models 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...
Page 53: Controls At Mode Changing / Start-Up
Control for Heat Pump Models Si01-406 Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline Operate the inverter in the open phase with the conditions including the preheating command (only for heat pump model) from the indoor, the outdoor air temperature . Detail Preheating ON Condition When outdoor air temperature is below 11.5°C, inverter in open phase operation starts.
Page 54: Input Current Control
Si01-406 Control for Heat Pump Models Input Current Control Outline Detect an input current by the CT during the compressor is running, and set the frequency upper limit from such input current. In case of heat pump model, this control is the upper limit control function of the frequency which takes priority of the lower limit of four way valve activating guarantee.
Page 55: Heating Peak-Cut Control
Control for Heat Pump Models Si01-406 Heating Peak-cut Control Outline Heat Pump Only During heating operation, the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure. (The signal from the indoor unit must be divided as follows.) Detail Conditions for Start Controlling...
Page 56: Liquid Compression Protection Function 1
Si01-406 Control for Heat Pump Models Liquid Compression Protection Function 1 (Securing of Differential Pressure and Blown Air Temperature) Outline To secure the reliability of the compressor (for dryness of suction refrigerant and differential pressure) which is the primary purpose of the compressor, the lower limit of the output frequency is limited to two stages under the condition of outside air temperature.
Page 57: Liquid Compression Protection Function 2
Control for Heat Pump Models Si01-406 Liquid Compression Protection Function 2 Outline In order to obtain the dependability of the compressor, the compressor must be stopped according to the conditions of the temperature of the outdoor air and outdoor heat exchanger. Detail Operation stop depending on the outdoor air temperature Compressor operation turns OFF under the conditions that the system is in cooling operation...
Page 58: Insufficient Gas Control
Si01-406 Control for Heat Pump Models 3.11 Insufficient Gas Control Outline If a power consumption is below the specified value in which the frequency is higher than the specified frequency, it must be regarded as gas insufficient. Insufficient gas zone 62 Hz Frequency (R4122)
Page 59: Forced Operation Mode
Control for Heat Pump Models Si01-406 3.12 Forced Operation Mode Outline Forced operating mode includes only forced cooling. Detail Forced Cooling Item Forced Cooling Forced operation 1) The outdoor unit is not abnormal allowing conditions and not in the 3-minute stand-by mode.
Page 60: Part 5 System Configuration
Si01-406 Part 5 Part 5 Part 5 Part 5 System Configuration System Configuration System Configuration System Configuration 1. System Configuration................50 2. Instructions....................51 2.1 Manual Contents by Models..............51 2.2 Safety Precautions .................52 2.3 Names of Parts..................54 2.4 Preparation before Operation..............63 2.5 AUTO • DRY • COOL • HEAT • FAN Operation ........66 2.6 Adjusting the Air Flow Direction .............68 2.7 POWERFUL Operation ................69 2.8 TIMER Operation ...................70...
Page 61: System Configuration
System Configuration Si01-406 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 62: Instructions
Si01-406 Instructions 2. Instructions Manual Contents by Models Reference Page Cooling Only Models Heat Pump Models Models FT25/35CV1A FT50/60CV1A FTY25/35CVMA Read before Operation Safety Precautions Names of Parts Preparation before Operation # Operation AUTO, DRY, COOL, HEAT, FAN Operation # Adjusting the Air Flow Direction # POWERFUL Operation # TIMER Operation #...
Page 63: Safety Precautions
• Do not attempt to repair, relocate, modify or reinstall the air conditioner by yourself. Incorrect work will cause electric shocks, fire etc. For repairs and reinstallation, consult your Daikin dealer for advice and information. • The refrigerant used in the air conditioner is safe. Although leaks should not occur, if for some reason any refrigerant happens to leak into the room, make sure it does not come in contact with any flame as of gas heaters, kerosene heaters or gas range.
Page 64: Installation Site
Si01-406 Instructions • Do not stand or sit on the outdoor unit. Do not place any object on the unit to avoid injury, do not remove the fan guard. • Do not place anything under the indoor or outdoor unit that must be kept away from moisture. In certain conditions, moisture in the air may condense and drip.
Page 65: Names Of Parts
Instructions Si01-406 Names of Parts FT25/35CV1A Names of parts I Indoor Unit System Configuration...
Page 66: I Outdoor Unit
Si01-406 Instructions I Outdoor Unit I I I I Indoor Unit 1. Air filter 11. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Air purifying filter with photocatalytic Push once again to stop it. deodorizing function: •...
Page 67 Instructions Si01-406 I Remote Controller AMPM AMPM ON/OFF POWERFUL TEMP MODE SWING CANCEL TIMER < > ARC423A18 1. Signal transmitter: 6. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. (DRY/COOL/FAN) 2. Display: •...
Page 68 Si01-406 Instructions FT50/60CV1A Names of parts I Indoor Unit I Main unit control panel System Configuration...
Page 69 Instructions Si01-406 I Outdoor Unit I I I I Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Air purifying filter with photocatalytic Push once again to stop it. deodorizing function: •...
Page 70 Si01-406 Instructions I Remote Controller ON/OFF TEMP POWERFUL MODE SWING SWING CANCEL TIMER < > ARC433A24 1. Signal transmitter: 8. SWING button: • It sends signals to the indoor unit. • Flap (Horizontal blade) 2. Display: 9. ON TIMER button •...
Page 71 Instructions Si01-406 FTY25/35CVMA Names of parts I Indoor Unit System Configuration...
Page 72 Si01-406 Instructions I Outdoor Unit I I I I Indoor Unit 1. Air filter 11. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Air purifying filter with photocatalytic Push once again to stop it. deodorizing function: •...
Page 73 Instructions Si01-406 I Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT SENSOR CANCEL TIMER < > ARC433A27 1. Signal transmitter: 7. FAN setting button: • It sends signals to the indoor unit. • It selects the air flow rate setting. 2.
Page 74: Preparation Before Operation
Si01-406 Instructions Preparation before Operation Preparation Before Operation I To set the batteries Position + and – correctly! 1. Press with a finger and slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION I I I I About batteries •...
Page 75 Instructions Si01-406 Preparation Before Operation I To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote control- ler, such as a curtain, the unit will not operate. •...
Page 76 Si01-406 Instructions I To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. HOME LEAVE ON/OFF Holding down “ ” or “ ” button rap- TEMP POWERFUL idly increases or decreases the time dis- play.
Page 77: Auto • Dry • Cool • Heat • Fan Operation
Instructions Si01-406 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 78 Si01-406 Instructions 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 79: Adjusting The Air Flow Direction
Instructions Si01-406 Adjusting the Air Flow Direction Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. I To adjust the horizontal blades (flaps) 1. Press “SWING button”. • “ ” is displayed on the LCD. 2.
Page 80: Powerful Operation
Si01-406 Instructions POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the effect in any of the operation modes. Using POWERFUL operation you will get always the maximum efficiency. 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 HOME LEAVE...
Page 81: Timer Operation
Instructions Si01-406 TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. I To use OFF TIMER opera- tion •...
Page 82 Si01-406 Instructions 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 83: Care And Cleaning
Instructions Si01-406 Care and Cleaning FT25/35CV1A, FTY25/35CVMA Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units I Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. I Front grille 1.
Page 84 Si01-406 Instructions Filters 1. Open the front grille. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the air purifying filter with photocatalytic deodorizing Air purifying Air filter filter with...
Page 85 Instructions Si01-406 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 86: Front Grille
Si01-406 Instructions FT50/60CV1A Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units I Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. I Front grille 1. Open the front grille. •...
Page 87 Instructions Si01-406 Filters 1. Open the front grille. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the air purifying filter with photocatalytic deodorizing function. •...
Page 88 Si01-406 Instructions 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 89: Troubleshooting
Instructions Si01-406 2.10 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 90: Check Again
Si01-406 Instructions 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 91 Instructions Si01-406 Call the service shop immediately. WARNING I I I I When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner.
Page 92: Part 6 Service Diagnosis
Si01-406 Part 6 Part 6 Part 6 Part 6 Service Diagnosis Service Diagnosis Service Diagnosis Service Diagnosis 1. Troubleshooting by Lamps..............82 2. Problem and Solution................83 3. Service Check Function ................84 3.1 ARC423 Series Remote Controller ............84 3.2 ARC433 Series Remote Controller ............85 4.
Page 93: Troubleshooting By Lamps
Troubleshooting by Lamps Si01-406 1. Troubleshooting by Lamps Operation Lamp 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 94: Problem And Solution
Si01-406 Problem and Solution Problem and Solution Problem Check Solution 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 95: Service Check Function
Service Check Function Si01-406 3. Service Check Function ARC423 Series Remote Controller The temperature display sections on the main unit indicate corresponding codes. 1. When the timer cancel button is held down for 5 seconds, a “00” indication flashes on the temperature display section.
Page 96: Arc433 Series Remote Controller
Si01-406 Service Check Function ARC433 Series Remote Controller The temperature display sections on the main unit indicate corresponding codes. 1. When the timer cancel button is held down for 5 seconds, a “00” indication flashes on the temperature display section. ON/OFF TEMP POWERFUL...
Page 97: Troubleshooting
Troubleshooting Si01-406 Troubleshooting Error Codes Reference Code Description Page System Normal — Insufficient gas Signal transmission error (between indoor and outdoor units) Indoor Indoor unit PCB abnormality Unit Freeze-up protection control or high pressure control AC motor Fan motor or related abnormality DC motor Heat exchanger thermistor abnormality Room temperature thermistor abnormality...
Page 98: Indoor Unit Pcb Abnormality
Si01-406 Troubleshooting Indoor Unit PCB Abnormality (A1) 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 Troubleshooting...
Page 99: Freeze-Up Protection Control Or High Pressure Control
Troubleshooting Si01-406 High Pressure Control (A5) Freeze-up Protection 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 Freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
Page 100 Si01-406 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Check the air passage. Refer to P.116 Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.
Page 101: Fan Motor Or Related Abnormality
Troubleshooting Si01-406 Fan Motor or Related Abnormality(A6) 4.4.1 AC motor (FT25/35CV1A, FTY25/35CVMA) 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 102 Si01-406 Troubleshooting 4.4.2 DC Motor (FT50/60CV1A) 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 H tap under maximum fan motor rotation demand.
Page 103 Troubleshooting Si01-406 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.115 and rotate fan by hand. Does fan rotate Replace fan motor. smoothly? Turn power ON and operate fan.
Page 104: Thermistor Or Related Abnormality (Indoor Unit)
Si01-406 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) (C4,C9) Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor operation ∗...
Page 105: Indoor Unit Pcb Abnormality
Troubleshooting Si01-406 Indoor Unit PCB Abnormality ∗ Remote Controller Display Method of The proper programme operation of the microcomputer is checked by the programme. Malfunction Detection Malfunction When the microcomputer programme does not function properly. Decision Conditions Supposed Microcomputer programme is in abnormal condition due to an external factor. *Noise Causes *Momentary voltage drop.
Page 106: Signal Transmission Error (Between Indoor And Outdoor Units)
Si01-406 Troubleshooting Signal Transmission Error (between Indoor and Outdoor Units) (U4) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of the data is abnormal.
Page 107: Ol Activation (Compressor Overload)
Troubleshooting Si01-406 Overload) (E5) OL Activation (Compressor Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will be shut down. The error counter will reset itself if this or any other error does not occur during the following Decision 60-minute compressor running time (total time).
Page 108: Compressor Lock
Si01-406 Troubleshooting Compressor Lock (E6) Remote Controller Display Method of Compressor startup errors are detected using input current detected by CT and compressor’s operation frequency. Malfunction Detection Malfunction When the inlet current is over the setting value. ∗ Setting value = (145 / 256 × Output frequency) – 6 (A) Decision Conditions When a compressor startup error is generated 16 times consecutively, the system shuts...
Page 109: Input Over Current Detection
Troubleshooting Si01-406 Input Over Current Detection (E8) 4.10 Remote Controller Display Method of An input over-current is detected by checking the input current value being detected by CT with the compressor running. Malfunction Detection Malfunction The following CT input with the compressor running continues for 2.5 seconds. Cooling: Above 11A, Heating: Above 13A Decision Conditions...
Page 110: Four Way Valve Abnormality
Si01-406 Troubleshooting Four Way Valve Abnormality (EA) 4.11 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 111 Troubleshooting Si01-406 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.115 Four way valve coil Correct. disconnected (loose)? Check No.6 Refer to P.116 Harness out of connector? Reconnect.
Page 112: High Pressure Control In Cooling
Si01-406 Troubleshooting High Pressure Control in Cooling (F6) 4.12 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...
Page 113 Troubleshooting Si01-406 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Check the installation space. Refer to P.116 Check No.7 Abnormal Check No.7 Installation condition Change the air outlet grille check position.
Page 114: Ct Or Related Abnormality
Si01-406 Troubleshooting CT or Related Abnormality (H8) 4.13 Remote Controller Display Method of A CT or related error is detected by checking the compressor running frequency and CT- detected input current. Malfunction Detection Malfunction The compressor running frequency is below 62 Hz and the CT input is below 0.1 V. (The input current is also below 0.5 A.) Decision If this error repeats 4 times, the system will be shut down.
Page 115 Troubleshooting Si01-406 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.12 Turn off the power and turn it on Refer to P.120 again. Get the system started. ∗...
Page 116: Thermistor Or Related Abnormality (Outdoor Unit)
Si01-406 Troubleshooting Thermistor or Related Abnormality (Outdoor Unit) (P4,J6,H9) 4.14 P4, 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 117 Troubleshooting Si01-406 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn on the power again. Refer to P.116 Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.
Page 118: Electrical Box Temperature Rise
Si01-406 Troubleshooting Electrical Box Temperature Rise (L3) 4.15 Remote Controller Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Malfunction Detection Malfunction With the compressor off, the radiation fin temperature is above 122°C. (Reset is made when the temperature drops below 113°C.) Decision Conditions...
Page 119 Troubleshooting Si01-406 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 WARNING Turn off the power and turn it on Refer to P.116 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 120˚C and stops itself...
Page 120: Radiation Fin Temperature Rise
Si01-406 Troubleshooting Radiation Fin Temperature Rise (L4) 4.16 Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on. Malfunction Detection Malfunction If the radiation fin temperature with the compressor on is above 81°C, If a radiation fin temperature rise takes place 4 times successively, the system will be shut Decision down.
Page 121 Troubleshooting Si01-406 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn off the power and turn it on Refer to P.116 again to get the system started. Check No.7 Refer to P.117 Error displayed again?
Page 122: Output Over Current Detection
Si01-406 Troubleshooting Output Over Current Detection (L5) 4.17 Remote Controller Display Method of An output over-current is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. A speed error occurs while the compressor is running.
Page 123 Troubleshooting Si01-406 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Check No.7 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.
Page 124: Insufficient Gas
Si01-406 Troubleshooting Insufficient Gas (U0) 4.18 Remote Controller Display Method of Gas shortage detection I : A gas shortage is detected by checking the CT-detected input current value and 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 125 Troubleshooting Si01-406 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.116 Any thermistor Reconnect in position. disconnected? * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor * Outdoor air thermistor...
Page 126: Check
Si01-406 Check 5. Check 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. Check rotation pulse input (pins 4-1). Motor power supply voltage Unused Unused...
Page 127: Thermistor Resistance Check
Check Si01-406 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. Thermistor R25°C=20kΩ...
Page 128: Installation Condition Check
Si01-406 Check 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 129: Discharge Pressure Check
Check Si01-406 Discharge Pressure Check Check No.8 Discharge pressure check High Replace compessor. Open the stop valve. Is the stop valve open? Is the Replace the pipe installed at connection pipe deformed? the site. Dirty Are the heat exchanger and Clean.
Page 130: Outdoor Unit Fan System Check
Si01-406 Check Outdoor Unit Fan System Check Check No.9 DC motor — FT50/60CV1A Check the outdoor unit fan system. Fan motor lead wire Outdoor unit fan running? Reconnect. connector disconnected? Outdoor unit fan system Go to Check No. 15. functioning. (R2857) AC motor —...
Page 131: Inverter Units Refrigerant System Check
Check Si01-406 Inverter Units Refrigerant System Check Check No.11 Refrigerant system check the discharge Correct the problem. thermister disconnected from the holder? Is any moisture Conduct vacuum drying. found in sight glass. Conduct the check after operating the equipment for a sufficient length of time. Check for gas leaks.
Page 132: Power Transistor Check
Si01-406 Check 5.10 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 133: Hall Ic Check
Check Si01-406 5.11 Hall IC Check Check No.16 1. Check the connector connection. 2. With the power ON, operation OFF, and the connector connected, check the following. ∗ Output voltage of about 5 V between pins 1 and 3. ∗ Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.
Page 134: Power Transistor Output Check
Si01-406 Check 5.12 Power Transistor Output Check Check No.17 Measure the output current and voltage of the power transistor. Output Current Remove the front panel, and measure the current in the red, yellow and blue wire harness inside the compressor using a clamp meter. Measurement 1.
Page 135: Inverter Units Compressor / Refrigerant System Check
Check Si01-406 5.13 Inverter Units Compressor / Refrigerant System Check Check No.18 Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Compressor/refrigerant system ∗ Check if there are any damage on refrigerant piping. check Does the equipment stop...
Page 136: Part 7 Removal Procedure
Si01-406 Part 7 Part 7 Part 7 Part 7 Removal Procedure Removal Procedure Removal Procedure Removal Procedure 1. FT25/35CV1A, FTY25/35CVMA ............126 1.1 Removal of Air Filter................126 1.2 Removal of Front Grille ................129 1.3 Removal of Horizontal Blades / Vertical Blades ........132 1.4 Removal of Electrical Parts Box / PCB / Swing Motor......134 1.5 Removal of Heat Exchanger ..............140 1.6 Install of Drain Plug ................143...
Page 137: Ft25/35Cv1A, Fty25/35Cvma
FT25/35CV1A, FTY25/35CVMA Si01-406 1. FT25/35CV1A, FTY25/35CVMA Removal of Air Filter Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. External features If ON/OFF button is kept pushing for 5 seconds, a forced cooling operation will be carried out for approx.
Page 138 Si01-406 FT25/35CV1A, FTY25/35CVMA Step Procedure Points 3. Remove the front panel. Hook a finger onto the Support the front panel by one projection part provided hand, while remove the rotation on the both sides of the axis at the upper center by the unit’s panel and open other hand.
Page 139 FT25/35CV1A, FTY25/35CVMA Si01-406 Step Procedure Points When restoring the air filter, make sure that the projection parts on the panel are in the guide groove, and then shut the panel. Removal Procedure...
Page 140: Removal Of Front Grille
Si01-406 FT25/35CV1A, FTY25/35CVMA 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 service cover. Remove a service cover mounting screw. Open service cover upward.
Page 141 FT25/35CV1A, FTY25/35CVMA Si01-406 Step Procedure Points 2. Remove the front grille assembly. Remove the two Screw stoppers inside the screws, in the right and flap which were equipped in the left, which fix the the existing models are not main body with the front provided.
Page 142 Si01-406 FT25/35CV1A, FTY25/35CVMA Step Procedure Points The front grille can be When restoring the grille, removed in a manner to Make sure whether each pull out the upper part hook is set as it was. forward and lift up the lower part.
Page 143: Removal Of Horizontal Blades / Vertical Blades
FT25/35CV1A, FTY25/35CVMA Si01-406 Removal of Horizontal Blades / Vertical Blades Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the horizontal blades. Lift horizontal blade to Screw stoppers inside the open position.
Page 144 Si01-406 FT25/35CV1A, FTY25/35CVMA Step Procedure Points For restoring. 1. Since the key pattern hook is provided on the left side, insert the edge of the blade to the tip while rotating it. 2. Restore the two fixed parts of the horizontal blade onto the hook.
Page 145: Removal Of Electrical Parts Box / Pcb / Swing Motor
FT25/35CV1A, FTY25/35CVMA Si01-406 Removal of Electrical Parts Box / PCB / 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 front grill. 1. Remove the electrical parts box.
Page 146 Si01-406 FT25/35CV1A, FTY25/35CVMA Step Procedure Points Remove a screw on the The electrical parts box can terminal strip. be removed instead of disengaging the terminal strip. Remove a screw on the electrical parts box. Removal Procedure...
Page 147 FT25/35CV1A, FTY25/35CVMA Si01-406 Step Procedure Points Pull up the electrical A hook is provided on the parts box forward to behind. remove. Removal Procedure...
Page 148 Si01-406 FT25/35CV1A, FTY25/35CVMA Step Procedure Points 2. Remove the printed circuit board (PCB). Remove the shelter. Disengage the front plate of the electrical parts box. Disengage the knobs by pushing the two hooks at the top and the bottom. Sliding to the left, the front part of the electrical parts box can be removed.
Page 149 FT25/35CV1A, FTY25/35CVMA Si01-406 Step Procedure Points Disengage the four knobs on the back of signal receiver PCB. Signal receiver PCB Removal Procedure...
Page 150 Si01-406 FT25/35CV1A, FTY25/35CVMA Step Procedure Points Control PCB The control printed circuit board is integrated with the power supply printed circuit board. 3. Remove the swing motor assembly. To remove swing motor assembly, remove two screws. (Manual adjusting for the vertical blades.) Provide a supporter so that the joint link will not drop off, in case the horizontal blade...
Page 151: Removal Of Heat Exchanger
FT25/35CV1A, FTY25/35CVMA Si01-406 Removal of Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Conduct pump-down Warning! operation. If gas leaks, repair the leak Remove the installation location, then connect all frame from the mounting refrigerant from the unit.
Page 152 Si01-406 FT25/35CV1A, FTY25/35CVMA Step Procedure Points Disengage the hooks of the pipe retainer on the back. Pull auxiliary pipe Be careful to prevent pipe forward to an angle of deformation. 10 to 20 degrees. Disengage hooks located right and left side, and pull heat exchanger forward.
Page 153 FT25/35CV1A, FTY25/35CVMA Si01-406 Step Procedure Points Lift and remove heat exchanger. Caution! When removing or re- installing heat exchanger, be sure to wear protective gloves or wrap heat exchanger with cloths. (Fins can cut fingers.) Removal Procedure...
Page 154: Install Of Drain Plug
Si01-406 FT25/35CV1A, FTY25/35CVMA Install of Drain Plug Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect drain hose. The drain pan is integrated with the bottom plate. Pull out the drain plug in the left on the drain pan by hand.
Page 155: Removal Of Fan Rotor / Fan Motor
FT25/35CV1A, FTY25/35CVMA Si01-406 Removal of Fan Rotor Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the heat exchanger. To remove right side panel, remove three screws.
Page 156 Si01-406 FT25/35CV1A, FTY25/35CVMA Step Procedure Points Disengage hook. Loosen the hexagon head set screw on the fan rotor. Removal Procedure...
Page 157 FT25/35CV1A, FTY25/35CVMA Si01-406 Step Procedure Points Remove the motor and fan rotor. Remove a screw on the left side panel. Removal Procedure...
Page 158 Si01-406 FT25/35CV1A, FTY25/35CVMA Step Procedure Points Disengage a hook from the backward. Since the fan bearing is made of rubber, push it strongly off from the inside. The bearing can be removed just as the left-side plate is attached with. Removal Procedure...
Page 159: Ft50/60Cv1A
FT50/60CV1A Si01-406 2. FT50/60CV1A Removal of Air Filter / Front Panel Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Features When the signal receiver catches a signal from the remote controller, it produces beep sound and the operation lamp blinks.
Page 160 Si01-406 FT50/60CV1A Step Procedure Points The right and left filters are interchangeable. Insert the air filters along grooves when installing. Set the air filters with displaying “FRONT” on the front side. Insert two claws of the air filter completely. 3. Remove an “air purifying filter with photocatalytic deodorizing...
Page 161 FT50/60CV1A Si01-406 Step Procedure Points 4. Remove the front panel. While opening the front panel further than it stops, release both axes and remove the front panel. Slide the front panel side to side to release each axis. Align the right and left axes with grooves in turn and insert them to the end when installing.
Page 162: Removal Of Front Grille
Si01-406 FT50/60CV1A 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 service cover. Loosen the screw and remove the service cover by the knob.
Page 163 FT50/60CV1A Si01-406 Step Procedure Points Undo the three hooks The front grille has three on the top of the front hooks on the center and the grille. both sides of the upper part. Refer to the removal procedure in a reverse way when reassembling.
Page 164: Removal Of Horizontal Blades / Vertical Blades
Si01-406 FT50/60CV1A Removal of Horizontal Blades / Vertical Blades Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the horizontal blades. Open the horizontal It has no fixing screws inside blades.
Page 165 FT50/60CV1A Si01-406 Step Procedure Points 2. Remove the vertical blades. Undo the right and left pivots. Undo the three claws. Pull the vertical blades rightwards and remove Removal Procedure...
Page 166: Removal Of Electrical Parts Box / Pcb / Swing Motor
Si01-406 FT50/60CV1A Removal of Electrical Parts Box / PCB / Swing 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 front grille. Parts layout 2.
Page 167 FT50/60CV1A Si01-406 Step Procedure Points 4. Remove the electrical parts box. Disconnect the four You can remove the connection wirings. electrical parts box without Loosen the screw and detaching the terminal strip remove the terminal board. strip board. Screw: M4×25 Disconnect the connectors for motor...
Page 168 Si01-406 FT50/60CV1A Step Procedure Points Dislocate the electrical The electrical parts box has parts box to the left and a claw on its back. undo the back claw. Pull the electrical parts Hook the back claw of the box out towards you. electrical parts box when reassembling.
Page 169 FT50/60CV1A Si01-406 Step Procedure Points Press the receiver units Release the claws on the down and release the upper side. claws on the upper side, and then undo the claws on the lower side. Cut the clamp. The receiver units Remove the receiver units contain four PCBs.
Page 170 Si01-406 FT50/60CV1A Step Procedure Points 5. Remove the control PCB. Undo the two claws on the lower side, and then the two claws on the upper side. Remove the control PCB. Control PCB (indoor unit) S1: connector for the fan motor S21: S26: connector for the buzzer PCB...
Page 171: Removal Of Heat Exchanger
FT50/60CV1A Si01-406 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 Caution box. If gas leaks, repair the spot of 1.
Page 172 Si01-406 FT50/60CV1A Step Procedure Points 2. Remove the indoor unit. Detach the indoor unit from the installation plate. 3. Remove the piping fixture. Release the claw on the upper side of the piping fixture on the back of the unit. 4.
Page 173 FT50/60CV1A Si01-406 Step Procedure Points Release the claws on the left side. Push the fixing claws on the right side and release. Pull the heat exchanger Caution to the front side and When removing or undo the claws reinstalling heat exchanger, completely, and then lift be sure to wear protective gloves or wrap the heat...
Page 174: Removal Of Fan Rotor / Fan Motor
Si01-406 FT50/60CV1A Removal of Fan Rotor / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side panel. Loosen the two screws. You can remove the fan rotor without detaching the right side panel.
Page 175 FT50/60CV1A Si01-406 Step Procedure Points 3. Remove the motor. Remove the fan rotor. Reassembling the fan motor (1) When reassembling the fan rotor, provide as much as 5mm of play between the side face of the rotor and the bottom frame. Side face of Side face of rotor bottom frame...
Page 176: R25/35Cv1A, Ry25/35Cvma
Si01-406 R25/35CV1A, RY25/35CVMA 3. R25/35CV1A, RY25/35CVMA Removal of Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points stop valve cover can be removed when the fixed screw is removed.
Page 177 R25/35CV1A, RY25/35CVMA Si01-406 Step Procedure Points top plate and the front plate constructed in a monoblock. Remove the three screws at the right side and the two screws at the front plate. Remove the three screws at the left side. Remove the one fixed left side plate and the...
Page 178: Removal Of Bellmouth And Left Side Plate
Si01-406 R25/35CV1A, RY25/35CVMA Removal of Bellmouth and Left Side Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points The bellmouth is Remove the bellmouth, attached with two beginning the front plate screws and four hooks.
Page 179: Removal Of Electrical Device Mounting Plate
R25/35CV1A, RY25/35CVMA Si01-406 Removal of Electrical Device Mounting Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. To remove the shelter. Remove the three fixed screws for removing the shelter.
Page 180: Removal Of Propeller Fan And Fan Motor
Si01-406 R25/35CV1A, RY25/35CVMA Removal of Propeller Fan 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 Disconnect the fan motor Remove the external plates connector S70.
Page 181: Removal Of Compressor Noise Absorption Pad
R25/35CV1A, RY25/35CVMA Si01-406 Removal of Compressor Noise Absorption Pad Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. To remove the right side plate. Remove the three screws for removing the right side plate.
Page 182 Si01-406 R25/35CV1A, RY25/35CVMA Step Procedure Points Pull out the body of the noise absorption pad. Since the slit prepared for the piping on the noise absorption pad is torn easily, remove the pad carefully. Pull out the body of the When restoring, the noise noise absorption pad absorption pad should pass...
Page 183: Removal Of Partition Plate
R25/35CV1A, RY25/35CVMA Si01-406 Removal of Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. To remove the partition plate. Disengage the lead wires from the wire clip. Remove the two screws fixing the partition plate.
Page 184 Si01-406 R25/35CV1A, RY25/35CVMA Step Procedure Points When restoring the partition plate, put the hook into the bottom frame. Removal Procedure...
Page 185: Removal Of Compressor
R25/35CV1A, RY25/35CVMA Si01-406 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. To remove the parts Be careful so as not to burn around the compressor.
Page 186: R50/60Cv1A
Si01-406 R50/60CV1A 4. R50/60CV1A Removal of Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points To dismount the panel, remove the four mounting screws (A). To dismount the front panel, remove the six mounting screws (B).
Page 187: Removal Of Electrical Parts Box
R50/60CV1A Si01-406 Removal of Electrical Parts 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 wire harness connectors from the PCB. Dismount the outdoor air thermistor and the heat exchanger...
Page 188 Si01-406 R50/60CV1A Step Procedure Points Remove top insulation material from compressor. Terminal code is printed. Do not scorch the indication with the flame of welder. Also record terminal code on a memo paper in case the indication becomes illegible. Remove terminal cover.
Page 189 R50/60CV1A Si01-406 Step Procedure Points Remove the screw. Take off the electrical parts box. Removal Procedure...
Page 190: Removal Of Compressor
Si01-406 R50/60CV1A 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 Make sure that there is no refrigerant in the unit before disassembling. Pull out sound insulation material (side insulation) from right...
Page 191 R50/60CV1A Si01-406 Step Procedure Points After disconnecting refrigerant pipes, remove three washer nuts that secure compressor in place. Use open-end wrench to remove washer nut (a) located on right front side. Use T-handle box wrench to loosen nuts (b) and (c). Removal Procedure...
Page 192: Part 8 Others
Si01-406 Part 8 Part 8 Part 8 Part 8 Others Others Others Others 1. Others ....................182 1.1 Test Run from the Remote Controller ..........182 1.2 Jumper Settings ...................184 Others...
Page 193: Others
Others Si01-406 1. Others Test Run from the Remote Controller ARC423 Series FT25/35CV1A Select the lowest programmable temperature. Trial operation in cooling mode may be disabled depending on the room temperature. Use the remote control for trial operation as described below. After trial operation is complete, set the temperature to a normal level (26°C to 28°C).
Page 194 Si01-406 Others ARC433 series FT50/60CV1A, FTY25/35CVMA Select the lowest programmable temperature. Trial operation in cooling mode may be disabled depending on the room temperature. Use the remote control for trial operation as described below. After trial operation is complete, set the temperature to a normal level (26°C to 28°C). For protection, the machine disables restart operation for 3 minutes after it is turned off.
Page 195: Jumper Settings
Others Si01-406 Jumper Settings 1.2.1 When Two Units are Installed in One Room How to set the different addresses. When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. PCB in the indoor unit Remove the front panel.
Page 196: Part 9 Appendix
Si01-406 Part 9 Part 9 Part 9 Part 9 Appendix Appendix Appendix Appendix 1. Piping Diagrams..................186 1.1 Indoor Units ..................186 1.2 Outdoor Units ..................187 2. Wiring Diagrams..................190 2.1 Indoor Units ..................190 2.2 Outdoor Units ..................191 Appendix...
Page 197: Piping Diagrams
Piping Diagrams Si01-406 1. Piping Diagrams Indoor Units FT25CV1A / FT35CV1A 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 FT25- FIELD PIPING 9.5CuT CuT ) FT35- 12.7...
Page 198: Outdoor Units
Si01-406 Piping Diagrams FTY25CVMA / FTY35CVMA INDOOR UNIT HEAT EXCHANGER 7.0CuT 6.4CuT THERMISTOR 6.4CuT ON HEAT EXCH. 6.4CuT CROSS FLOW FAN FIELD PIPING ( 6.4CuT ) FAN MOTOR FIELD PIPING 9.5CuT CuT ) REFRIGERANT FLOW COOLING FTY25-- HEATING FTY35-- 12.7 4D045923 Outdoor Units R25CV1A...
Page 199 Piping Diagrams Si01-406 R35CV1A OUTDOOR UNIT HEAT EXCHANGER 7.9CuT 7.9CuT CAPILLARY TUBE 7.9CuT 7.9CuT 6.4CuT FIELD PIPING ( 6.4CuT ) LIQUID STOP VALVE PROPELLER FAN 12.7CuT 12.7CuT FIELD PIPING ( 12.7CuT ) GAS STOP VALVE WITH SERVICE PORT ACCUMULATOR COMPRESSOR 3D020877C R50CV1A / R60CV1A OUTDOOR UNIT...
Page 200 Si01-406 Piping Diagrams RY25CVMA OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE 7.9CuT THERMISTOR 7.9CuT HEAT EXCHANGER THERMISTOR CAPILLARY TUBE 1 7.9CuT 6.4CuT 7.9CuT CAPILLARY TUBE 2 PROPELLER FAN 9.5CuT REVERSING FOUR WAY FIELD PIPING SOLENOID VALVE ( 6.4CuT ) VALVE LIQUID ON:COOLING STOP VALVE 9.5CuT...
Page 201: Wiring Diagrams
Wiring Diagrams Si01-406 2. Wiring Diagrams Indoor Units FT25CV1A / FT35CV1A PCB1 tº TO OUTDOOR 3.15A UNIT SA1 V2 WIRELESS REMOTE CONTROLLER / YLW PCB2 140ºC LED1 LED2 tº SIGNAL RECEIVER tº : RUNNING CAPACITOR R1T , R2T : THERMISTOR...
Page 202: Outdoor Units
Si01-406 Wiring Diagrams FTY25CVMA / FTY35CVMA PCB1 → 3.15A outdoor TERMINAL FOR PCB2 CENTRALIZED CONTROL / YLW FIELD WIRING. TRANSMISSION LED1 LED2 LED3 CIRCUIT CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS SIGNAL TURNED OFF AND THEN BACK t˚...
Page 203 Wiring Diagrams Si01-406 R35CV1A C11R , C12R : RUNNING CAPACITOR : FUSE : COMPRESSOR RELAY : FAN MOTOR : LIVE : OVERLOAD PROTECTOR : NEUTRAL X1M , X2M : TERMINAL STRIP : COMPRESSOR MOTOR : THERMAL FUSE : PROTECTIVE EARTH TO INDOOR UNIT C11R 3.15A...
Page 204 Si01-406 Wiring Diagrams R60CV1A indoor FIELD WIRING. C11R / YLW 3.15A X11A C12R outdoor : LIVE NOTES POWER SUPPLY / YLW 1. REFER TO THE NAMEPLATE FOR ~ 50Hz 220-240V M1C : COMPRESSOR MOTOR THE POWER REQUIREMENTS. M1F : FAN MOTOR : NEUTRAL C11R , C12R : RUNNING CAPACITOR : THERMOSTAT...
Page 205 Wiring Diagrams Si01-406 Appendix...
Page 206 Si01-406 Index Index Index Index Numerics CT or related abnormality ........103 00 ................86 3-minutes standby ........27, 37, 42 defrost control ............46 discharge pipe ............. 179 discharge pressure check ........118 A1 ................87 display PCB ............15 A5 ................88 drain hose ...........
Page 207 Si01-406 filters LED indication ............82 air purifying filter with photocatalytic deodorizing left side plate ..........166, 167 function ........26, 37, 149 liquid compression protection function 1 ....45 mold proof air filter ........26, 37 liquid compression protection function 2 ....46 forced cooling operation .........30 liquid piping ..........
Page 208 Si01-406 S32 ...............159 S6 ..............134, 156 S7 .................134 S70 ...............169 safety precautions ..........52 self-diagnosis digital display ........37 service check function ..........84 service cover ........129, 151, 175 shelter ..........137, 157, 168 side panel .............175 signal receiver ..........126, 148 signal receiver PCB ......13, 15, 17, 138 signal receiving sign .........26, 37 signal transmission error ........95 specifications ............6...
Page 209 Si01-406 Index...
Page 210 ......119 output over current detection ......111 defrost control ............46 discharge pressure check ........118 piping diagrams display PCB ............15 FT25CV1A ............ 186 FT35CV1A ............ 186 FT50CV1A ............ 186 electrical box temperature rise ......107 FT60CV1A ............ 186 FTY25CVMA ..........187 FTY35CVMA ..........
Page 211 ...............38 thermistor or related abnormality (indoor unit) ..93 thermistor or related abnormality (outdoor unit) ...105 thermistor resistance check .........116 trial operation from remote controller ..182 wiring diagrams FT25CV1A .............190 FT35CV1A .............190 FT50CV1A .............190 FT60CV1A .............190 FTY25CVMA ..........191 FTY35CVMA ..........191 R25CV1A ............191...
Page 212 Head office: Zandvoordestraat 300, B-8400 Oostende, Belgium Umeda Center Bldg., 4-12, Nakazaki-Nishi 2-chome, Kita-ku, Osaka, 530-8323 Japan Tokyo office: Shinjuku Sumitomo Bldg., 6-1 Nishi-Shinjuku 2-chome, Shinjuku-ku, Tokyo, 163-0235 Japan For further improvement, specifications or designs are subject to change without prior notice. Printed in Singapore 03/2004 AK COS...

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Daikin FT25CV1A Service Manual

Part 1 List of Function

Part 2 Specifications

Part 3 Printed Circuit Board Connector Wiring Diagram

Part 4 Functions and Control

Part 5 System Configuration

Part 6 Service Diagnosis

Part 7 Removal Procedure

Part 8 Others

Part 9 Appendix

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