Daikin FTXN25KEV1B Service Manual
Inverter pair wall mounted type k-series
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Summary of Contents for Daikin FTXN25KEV1B
- Page 1 SiBE041102_A Service Manual Inverter Pair Wall Mounted Type K-Series [Applied Models] Inverter Pair : Heat Pump...
- Page 2 SiBE041102_A Inverter Pair Wall Mounted Type K-Series Heat Pump Indoor Unit FTXN25KEV1B FTXN35KEV1B Outdoor Unit RXN25KEV1B RXN35KEV1B Table of Contents...
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Page 3: Table Of Contents
SiBE041102_A 1. Introduction .....................v 1.1 Safety Cautions ..................v 1.2 Used Icons ....................ix Part 1 List of Functions ..............1 1. Functions....................2 Part 2 Specifications ..............3 1. Specifications ..................4 Part 3 Printed Circuit Board Connector Wiring Diagram ..... 5 1. - Page 4 SiBE041102_A 2.4 COMFORT AIRFLOW Operation ............42 2.5 POWERFUL Operation ................43 2.6 ECONO Operation .................44 2.7 OFF TIMER Operation ................45 2.8 ON TIMER Operation ................46 Part 6 Service Diagnosis............. 47 1. Troubleshooting with LED ..............48 1.1 Indoor Unit....................48 1.2 Outdoor Unit ...................48 2.
- Page 5 SiBE041102_A Part 7 Removal Procedure ............95 1. Indoor Unit.....................96 1.1 Removal of Air Filters ................96 1.2 Removal of Horizontal Blade..............98 1.3 Removal of Front Panel................100 1.4 Removal of Front Grille ................101 1.5 Removal of Electrical Box / Vertical Blades .........102 1.6 Removal of Swing Motor / PCBs ............107 1.7 Removal of Indoor Heat Exchanger .............111 1.8 Removal of Fan Rotor / Fan Motor............114...
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Page 6: Introduction
Introduction SiBE041102_A 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 SiBE041102_A Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety measures may cause a fall accident. In case of R-410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R-410A refrigerant.
- Page 8 Introduction SiBE041102_A 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.
- Page 9 SiBE041102_A Introduction Warning Be sure to install the product correctly by using the provided standard For unitary type installation frame. only Incorrect use of the installation frame and improper installation may cause the equipment to fall, resulting in injury. Be sure to install the product securely in the installation frame mounted on the For unitary type window frame.
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Page 10: Used Icons
Introduction SiBE041102_A Caution Do not tilt the unit when removing it. The water inside the unit may spill and wet the furniture and floor. Be sure to install the packing and seal on the installation frame properly. For unitary type If the packing and seal are not installed properly, water may enter the room and only wet the furniture and floor. -
Page 11: Part 1 List Of Functions
SiBE041102_A Part 1 List of Functions 1. Functions....................2 List of Functions... -
Page 12: Functions
Functions SiBE041102_A 1. Functions Category Functions Category Functions Basic Inverter Health & Clean Air-Purifying Filter — Function (with Inverter Power Control) Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — ~ 46 Air-Purifying Filter with Photocatalytic – Operation Limit for Heating (°CWB) —... -
Page 13: Part 2 Specifications
SiBE041102_A Part 2 Specifications 1. Specifications ..................4 Specifications... -
Page 14: Specifications
Specifications SiBE041102_A 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXN25KEV1B FTXN35KEV1B Model RXN25KEV1B RXN35KEV1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.3 ~ 2.8) 2.8 (1.3 ~ 3.5) 3.2 (1.3 ~ 3.5) 3.5 (1.3 ~ 3.7) -
Page 15: Part 3 Printed Circuit Board Connector Wiring Diagram
SiBE041102_A Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................6 2. Outdoor Unit....................8 Printed Circuit Board Connector Wiring Diagram... -
Page 16: Indoor Unit
Indoor Unit SiBE041102_A 1. Indoor Unit Connectors and PCB (1): Control PCB Other Parts 1) S1, S7 Connector for fan motor 2) S6 Connector for swing motor (horizontal blade) 3) S21 Connector for wired remote controller (option) 4) S26 Connector for display PCB 5) S32 Connector for indoor heat exchanger thermistor 6) H1, H2, H3, FG Connector for terminal board... - Page 17 SiBE041102_A Indoor Unit PCB Detail PCB (1): Control PCB LED_A LED_A JB JC JA JB JC JA 2P270085-1 PCB (2): Display PCB LED2 LED1 (Solder side) RTH1 3P206563-1 Printed Circuit Board Connector Wiring Diagram...
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Page 18: Outdoor Unit
Outdoor Unit SiBE041102_A 2. Outdoor Unit Connectors and Other Parts 1) S20 Connector for electronic expansion valve coil 2) S40 Connector for overload protector 3) S70 Connector for fan motor 4) S80 Connector for four way valve coil 5) S90 Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) 6) HL1, HN1, S... -
Page 19: Part 4 Function And Control
SiBE041102_A Part 4 Function and Control 1. Main Functions..................10 1.1 Temperature Control ................10 1.2 Frequency Principle................10 1.3 Airflow Direction Control.................12 1.4 Fan Speed Control for Indoor Unit ............13 1.5 Program Dry Operation ................14 1.6 Automatic Operation................15 1.7 Thermostat Control.................16 1.8 NIGHT SET Mode ..................17 1.9 ECONO Operation .................18 1.10 Inverter POWERFUL Operation .............19 1.11 Other Functions..................20... -
Page 20: Main Functions
Main Functions SiBE041102_A 1. Main Functions Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures Room temperature: temperature of lower part of the room Set temperature: temperature set by remote controller Room thermistor temperature: temperature detected by room temperature thermistor Target temperature: temperature determined by microcomputer Target temperature Room thermistor temperature... - Page 21 SiBE041102_A Main Functions Drawing of The following drawing shows a schematic view of the inverter principle: Inverter Refrigerant circulation rate (high) high speed Amount of heat Amount of heat exchanged air (large) exchanged air (large) high f low f Amount of heat Amount of heat exchanged air (small) exchanged air (small)
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Page 22: Airflow Direction Control
Main Functions SiBE041102_A Airflow Direction Control Power-Airflow The large flap sends a large volume of air downwards to the floor. The flap provides an optimum control in cooling, dry, and heating mode. Flap Cooling / Dry Mode During cooling or dry mode, the flap retracts into the indoor unit. Then, cool air can be blown far and distributed all over the room. -
Page 23: Fan Speed Control For Indoor Unit
SiBE041102_A Main Functions Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature. -
Page 24: Program Dry Operation
Main Functions SiBE041102_A Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and fan adjustment buttons are inoperable in this mode. Detail The microcomputer automatically sets the temperature and airflow rate. -
Page 25: Automatic Operation
SiBE041102_A Main Functions Automatic Operation Outline Automatic Cooling / Heating Function When the AUTO mode is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up, and automatically operates in that mode. The unit automatically switches the operation mode to maintain the room temperature at the set temperature. -
Page 26: Thermostat Control
Main Functions SiBE041102_A Thermostat Control Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference returns to the zone C after being in the zone A. The system resumes from defrost control in any zones except A. -
Page 27: Night Set Mode
SiBE041102_A Main Functions NIGHT SET Mode Outline When the OFF timer is set, the NIGHT SET Mode is automatically activated. The NIGHT SET Mode keeps the airflow rate setting. Detail The NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in the case of cooling, or lowers it slightly in the case of heating. -
Page 28: Econo Operation
Main Functions SiBE041102_A ECONO Operation The "ECONO operation" reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners. -
Page 29: Inverter Powerful Operation
SiBE041102_A Main Functions 1.10 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Detail When POWERFUL button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes. -
Page 30: Other Functions
Main Functions SiBE041102_A 1.11 Other Functions 1.11.1 Hot-Start Function In order to prevent the cold air blast that normally comes when heating operation is started, the temperature of the indoor heat exchanger is detected, and either the airflow is stopped or is made very weak thereby carrying out comfortable heating of the room. -
Page 31: Function Of Thermistor
SiBE041102_A Function of Thermistor 2. Function of Thermistor Electronic expansion valve Four way valve Compressor (R14247) (1) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge pipe temperature. The system sets the target discharge pipe temperature according to the Exchanger outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve Thermistor... -
Page 32: Control Specification
Control Specification SiBE041102_A 3. Control Specification Mode Hierarchy Outline There are two modes; the one is the normal operation mode and the other is the forced operation mode for installation and servicing. Detail Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode Normal operation mode... -
Page 33: Frequency Control
SiBE041102_A Control Specification Frequency Control Outline Frequency is determined according to the difference between the room thermistor temperature and the target temperature. The function is explained as follows. 1. How to determine frequency 2. Frequency command from the indoor unit (Difference between the room thermistor temperature and the target temperature) 3. - Page 34 Control Specification SiBE041102_A Indoor Frequency Command ( ∆ D signal) The difference between the room thermistor temperature and the target temperature is taken as the “ ∆ D signal” and is used for frequency command. ∆D ∆D ∆D ∆D Temperature Temperature Temperature Temperature...
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Page 35: Controls At Mode Changing / Start-Up
SiBE041102_A Control Specification Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline The inverter operation in open phase starts with the conditions of the preheating command from the indoor unit, the outdoor temperature, and the discharge pipe temperature. Outdoor temperature ≥ 7°C → Control A Detail Outdoor temperature <... -
Page 36: Discharge Pipe Temperature Control
Control Specification SiBE041102_A 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not activated when defrosting.) (Hz) Frequency (sec.) Time (R13528) A (Hz) B (Hz) C (Hz) D (seconds) E (seconds) -
Page 37: Input Current Control
SiBE041102_A Control Specification Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit from the input current. In case of heat pump model, this control which is the upper limit control of the frequency takes priority over the lower limit of control of four way valve operation compensation. -
Page 38: Freeze-Up Protection Control
Control Specification SiBE041102_A Freeze-up Protection Control Outline During cooling operation, the signal sent from the indoor unit controls the operating frequency limitation and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into zones.) Detail The operating frequency limitation is judged with the indoor heat exchanger temperature. -
Page 39: Outdoor Fan Control
SiBE041102_A Control Specification Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control while defrosting The outdoor fan is turned OFF while defrosting. -
Page 40: Defrost Control
Control Specification SiBE041102_A 3.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish. Detail Conditions for Starting Defrost The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature. -
Page 41: Electronic Expansion Valve Control
SiBE041102_A Control Specification 3.11 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalization control Open Control 1. - Page 42 Control Specification SiBE041102_A 3.11.1 Fully Closing with Power ON The electronic expansion valve is initialized when turning on the power. The opening position is set and the pressure equalization is developed. 3.11.2 Pressure Equalization Control When the compressor is stopped, the pressure equalization control is activated. The electronic expansion valve opens, and develops the pressure equalization.
- Page 43 SiBE041102_A Control Specification 3.11.7 Control for Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, and operates for a specified time, and then stops.
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Page 44: Malfunctions
Control Specification SiBE041102_A 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. Radiation fin thermistor 4. Outdoor temperature thermistor 3.12.2 Detection of Overcurrent and Overload Outline An excessive output current is detected and the OL temperature is observed to protect the compressor. -
Page 45: Part 5 Operation Manual
SiBE041102_A Part 5 Operation Manual 1. System Configuration................36 2. Operation Manual..................37 2.1 Remote Controller ..................37 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........38 2.3 Adjusting the Airflow Direction..............40 2.4 COMFORT AIRFLOW Operation ............42 2.5 POWERFUL Operation ................43 2.6 ECONO Operation .................44 2.7 OFF TIMER Operation ................45 2.8 ON TIMER Operation ................46... -
Page 46: System Configuration
System Configuration SiBE041102_A 1. System Configuration After installation and trial operation of the room air conditioner are completed, the air conditioner should be handled and operated as described in the following pages. Every user should be informed on the correct method of operation and how to check if it can cool (or heat) well, and how to use it efficiently. -
Page 47: Operation Manual
SiBE041102_A Operation Manual 2. Operation Manual Remote Controller Names of Parts Remote Controller <ARC470A1> 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. (AUTO/DRY/COOL/HEAT/FAN) (page 9) 2. Display (LCD): •... -
Page 48: Auto·dry·cool·heat·fan Operation
Operation Manual SiBE041102_A 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. To start operation 1. - Page 49 SiBE041102_A Operation Manual AUTO·DRY·COOL·HEAT·FAN Operation To change the airflow rate setting 5. Press AUTO or COOL or HEAT or FAN operation DRY operation 5 levels of airflow rate setting The airflow rate setting is not variable. from “ ” to “ ”...
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Page 50: Adjusting The Airflow Direction
Operation Manual SiBE041102_A Adjusting the Airflow Direction Adjusting the Airflow Direction You can adjust the airflow direction to increase your comfort. To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. • The flap (horizontal blade) will begin to swing. To set the flap at desired position •... - Page 51 SiBE041102_A Operation Manual Adjusting the Airflow Direction To adjust the louvers (vertical blades) Hold the knob and move the louvers. (You will find a knob on the left-side and the right-side blades.) • When the unit is installed in the corner of a room, the direction of the louvers should be facing away from the wall.
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Page 52: Comfort Airflow Operation
Operation Manual SiBE041102_A COMFORT AIRFLOW Operation COMFORT AIRFLOW Operation The flow of air will be in the upward direction while in COOL operation and in the downward direction while in HEAT operation, which will provide a comfortable wind that will not come in direct contact with people. -
Page 53: Powerful Operation
SiBE041102_A Operation Manual POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximises the cooling (heating) effect in any operation mode. You can get the maximum capacity. To start POWERFUL operation 1. Press • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation. -
Page 54: Econo Operation
Operation Manual SiBE041102_A ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by limiting the maximum power consumption value. This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances. -
Page 55: Off Timer Operation
SiBE041102_A Operation Manual OFF TIMER Operation OFF TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation 1. -
Page 56: On Timer Operation
Operation Manual SiBE041102_A ON TIMER Operation ON TIMER Operation To use ON TIMER operation 1. Press “ ” is displayed on the LCD. Each pressing of advances the time setting by 1 hour. The time can be set between 1 to 12 hours. •... -
Page 57: Part 6 Service Diagnosis
SiBE041102_A Part 6 Service Diagnosis 1. Troubleshooting with LED ..............48 1.1 Indoor Unit....................48 1.2 Outdoor Unit ...................48 2. Problem Symptoms and Measures ............49 3. Service Check Function ................50 4. Troubleshooting ..................53 4.1 Error Codes and Description ..............53 4.2 Indoor Unit PCB Abnormality ..............54 4.3 Freeze-up Protection Control or Heating Peak-cut Control....55 4.4 Fan Motor (AC Motor) or Related Abnormality........57 4.5 Thermistor or Related Abnormality (Indoor Unit)........59... -
Page 58: Troubleshooting With Led
Troubleshooting with LED SiBE041102_A 1. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks 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. -
Page 59: Problem Symptoms And Measures
SiBE041102_A Problem Symptoms and Measures 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page The unit does not operate. Check the power supply. Check if the rated voltage is supplied. — Check the type of the indoor unit. Check if the indoor unit type is compatible with —... -
Page 60: Service Check Function
Service Check Function SiBE041102_A 3. Service Check Function 1. When the timer cancel button is held down for 5 seconds, 00 indication is displayed on the Check Method 1 temperature display screen. Timer cancel button <ARC470 Series> (R14571) 2. Press the timer cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below. - Page 61 SiBE041102_A Service Check Function Check Method 2 1. Press the center of the [TEMP] button and the [MODE] button at the same time to enter the diagnosis mode. (R14572) The left-side number blinks. (R14269) 2. Press the [TEMP] button and change the number until you hear the two consecutive beeps or the long beep.
- Page 62 Service Check Function SiBE041102_A 5. Press the [TEMP] button and change the number until you hear the long beep. (R14573) 6. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not.
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Page 63: Troubleshooting
SiBE041102_A Troubleshooting 4. Troubleshooting Error Codes and Description Reference Error Codes Description Page System Normal — Refrigerant shortage Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Unspecified voltage (between indoor unit and outdoor unit) Indoor Indoor unit PCB abnormality Unit... -
Page 64: Indoor Unit Pcb Abnormality
Troubleshooting SiBE041102_A Indoor Unit PCB Abnormality Remote Controller Display Method of The system checks if the circuit works properly within the microcomputer of the indoor unit. Malfunction Detection Malfunction The system cannot set the internal settings. Decision Conditions Supposed Wrong models interconnected Causes Defective indoor unit PCB Disconnection of connector... -
Page 65: Freeze-Up Protection Control Or Heating Peak-Cut Control
SiBE041102_A Troubleshooting Freeze-up Protection Control or Heating Peak-cut Control Remote Controller Display Method of Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated Malfunction according to the temperature detected by the indoor heat exchanger thermistor. Detection Heating peak-cut control During heating operation, the temperature detected by the indoor heat exchanger thermistor... - Page 66 Troubleshooting SiBE041102_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Check the air passage. Refer to P.87 Is there any short circuit? Provide sufficient air passage. Check the air filter.
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Page 67: Fan Motor (Ac Motor) Or Related Abnormality
SiBE041102_A Troubleshooting Fan Motor (AC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction The detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed. - Page 68 Troubleshooting SiBE041102_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Check the power supply voltage. Refer to P.88 Voltage as rated? Correct the power supply. ∗ Before starting operation, turn off the indoor unit with the remote controller or the indoor unit ON/OFF button.
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Page 69: Thermistor Or Related Abnormality (Indoor Unit)
SiBE041102_A Troubleshooting Thermistor or Related Abnormality (Indoor Unit) C4 , C9 Remote Controller Display Method of The temperatures detected by the thermistors determine thermistor errors. Malfunction Detection Malfunction The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Decision Conditions Supposed... -
Page 70: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)
Troubleshooting SiBE041102_A Signal Transmission Error (between Indoor Unit 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 The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal. - Page 71 SiBE041102_A Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.11 Check the power supply voltage. Refer to P.88 Voltage as rated? Correct the power supply. Check the indoor unit - outdoor unit connection wires.
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Page 72: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)
Troubleshooting SiBE041102_A Unspecified Voltage (between Indoor Unit and Outdoor Unit) Remote Controller Display Method of The supply power is detected for its requirements (different from pair type and multi type models) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction Pair type and multi type models are interconnected. -
Page 73: Outdoor Unit Pcb Abnormality
SiBE041102_A Troubleshooting Outdoor Unit PCB Abnormality Remote Controller Display Method of The system checks to see if the IPM works in order. The system checks to see if the zero-cross signal comes in properly. Malfunction Detection Malfunction The IPM sends no signal. The zero-cross signal is not detected. -
Page 74: Ol Activation (Compressor Overload)
Troubleshooting SiBE041102_A OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the error repeats, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error Decision ∗... -
Page 75: Compressor Lock
SiBE041102_A Troubleshooting 4.10 Compressor Lock Remote Controller Display Method of A compressor lock is detected by the current waveform generated when applying high- Malfunction frequency voltage to the motor. Detection Malfunction If the error repeats, the system is shut down. Reset condition: Continuous run for about 11 minutes without any other error Decision Conditions... -
Page 76: Input Overcurrent Detection
Troubleshooting SiBE041102_A 4.11 Input Overcurrent Detection Remote Controller Display Method of An input overcurrent is detected by checking the input current value with the compressor Malfunction running. Detection Malfunction The current exceeds about 8.5 ~ 10.5 A for 2.5 seconds with the compressor running. (The upper limit of the current decreases when the outdoor temperature exceeds a certain Decision level.) -
Page 77: Four Way Valve Abnormality
SiBE041102_A Troubleshooting 4.12 Four Way Valve Abnormality Remote Controller Display Method of The room temperature thermistor, the indoor heat exchanger thermistor, the outdoor Malfunction temperature thermistor, and the outdoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode. Detection Malfunction A following condition continues over 10 minutes after operating for 5 minutes. - Page 78 Troubleshooting SiBE041102_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Four way valve coil Correct it. Refer to P.87 disconnected (loose)? Check No.13 Harness out of connector? Refer to P.90 Reconnect it.
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Page 79: Discharge Pipe Temperature Control
SiBE041102_A Troubleshooting 4.13 Discharge Pipe Temperature Control Remote Controller Display Method of An error is determined with the temperature detected by the discharge pipe thermistor. Malfunction Detection Malfunction If the temperature detected by the discharge pipe thermistor rises above A °C, the compressor stops. -
Page 80: High Pressure Control In Cooling
Troubleshooting SiBE041102_A 4.14 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if Malfunction the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection Malfunction The temperature sensed by the outdoor heat exchanger thermistor rises above about 60°C. -
Page 81: Compressor System Sensor Abnormality
SiBE041102_A Troubleshooting 4.15 Compressor System Sensor Abnormality Remote Controller Display Method of The system checks the DC current before the compressor starts. Malfunction Detection Malfunction The DC current before compressor start-up is out of the range 0.5 ~ 4.5 V (sensor output converted to voltage value) Decision The DC voltage before compressor start-up is below 50 V. -
Page 82: Position Sensor Abnormality
Troubleshooting SiBE041102_A 4.16 Position Sensor Abnormality Remote Controller Display Method of A compressor start-up 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 83 SiBE041102_A Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Turn off the power. Refer to P.91 Check the power supply voltage. Check No.18 Refer to P.93 Voltage as rated? Correct the power supply.
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Page 84: Dc Voltage / Current Sensor Abnormality
Troubleshooting SiBE041102_A 4.17 DC Voltage / Current Sensor Abnormality Remote Controller Display Method of DC voltage or DC current sensor abnormality is identified based on the compressor running Malfunction frequency and the input current. Detection Malfunction The compressor running frequency is above 52 Hz. (The input current is also below 0.1 A.) Decision If the error repeats, the system is shut down. -
Page 85: Thermistor Or Related Abnormality (Outdoor Unit)
SiBE041102_A Troubleshooting 4.18 Thermistor or Related Abnormality (Outdoor Unit) H9 , J3 , J6 , P4 Remote Controller Display Method of This fault is identified based on the thermistor input voltage to the microcomputer. Malfunction A thermistor fault is identified based on the temperature sensed by each thermistor. Detection Malfunction The thermistor input voltage is above 4.96 V or below 0.04 V with the power on. - Page 86 Troubleshooting SiBE041102_A In case of “ H9 ” “ J3 ” “ J6 ” Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn on the power again. Refer to P.87 Error displayed Reconnect the connectors...
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Page 87: Electrical Box Temperature Rise
SiBE041102_A Troubleshooting 4.19 Electrical Box Temperature Rise Remote Controller Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor off. Detection Malfunction With the compressor off, the radiation fin temperature is above A °C. The error is cleared when the radiation fin temperature drops below B °C. - Page 88 Troubleshooting SiBE041102_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 WARNING Turn off the power and turn it on again. To cool the electrical components, Refer to P.92 the outdoor fan starts when the radiation fin temperature rises above C ˚C and stops when it...
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Page 89: Radiation Fin Temperature Rise
SiBE041102_A Troubleshooting 4.20 Radiation Fin Temperature Rise Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor on. Detection Malfunction If the radiation fin temperature with the compressor on is above A °C. The error is cleared when the radiation fin temperature drops below B °C. - Page 90 Troubleshooting SiBE041102_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 Turn off the power and turn it on Refer to P.92 again to start the system. Check No.19 Refer to P.93 Error displayed again?
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Page 91: Output Overcurrent Detection
SiBE041102_A Troubleshooting 4.21 Output Overcurrent Detection Remote Controller Display Method of An output overcurrent 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 92 Troubleshooting SiBE041102_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement, check the Refer to P.91 wiring again.
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Page 93: Refrigerant Shortage
SiBE041102_A Troubleshooting 4.22 Refrigerant Shortage Remote Controller Display Method of Refrigerant shortage detection I: Malfunction Refrigerant shortage is detected by checking the input current value and the compressor running frequency. If the refrigerant is short, the input current is lower than the normal value. Detection Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of... - Page 94 Troubleshooting SiBE041102_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.87 Any thermistor Replace them in position. disconnected? ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗...
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Page 95: Low-Voltage Detection Or Over-Voltage Detection
SiBE041102_A Troubleshooting 4.23 Low-voltage Detection or Over-voltage Detection Remote Controller Display Method of Indoor Unit Malfunction Evaluation of zero-cross detection of power supply by the indoor unit PCB. Detection Outdoor Unit Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit. - Page 96 Troubleshooting SiBE041102_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Voltage as rated? Correct the power supply. Check the connection of the compressor harness. Loose or Reconnect it.
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Page 97: Check
SiBE041102_A Check 5. Check Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using a tester. The relationship between normal temperature and resistance is shown in the table and the graphs below. -
Page 98: Hall Ic Check
Check SiBE041102_A Hall IC Check Check No.04 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. If NG in step 1 Defective PCB Replace the PCB. -
Page 99: Electronic Expansion Valve Check
SiBE041102_A Check Electronic Expansion Valve Check Check No.12 Conduct the followings to check the electronic expansion valve (EV). 1. Check to see if the EV connector is correctly connected to the PCB. 2. Turn the power off and on again, and check to see if the EV generate a latching sound. 3. -
Page 100: Four Way Valve Performance Check
Check SiBE041102_A Four Way Valve Performance Check Check No.13 Turn off the power and turn it on again. ∗ Four way valve coil Start heating operation. Cooling / Dry : No continuity Heating : Continuity voltage at 220 - 240 Replace the outdoor unit VAC with compressor PCB. -
Page 101: Inverter Checker" Check
SiBE041102_A Check “Inverter Checker” Check Check No.15 Characteristics If an abnormal stop occurs due to compressor startup failure or overcurrent output when using inverter unit, it is difficult to judge whether it is caused by the compressor failure or other failure (control PCB, power module, etc.). -
Page 102: Installation Condition Check
Check SiBE041102_A Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) When all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) When the LEDs are not lit uniformly, check the power module. → Refer to Check No.22. -
Page 103: Discharge Pressure Check
SiBE041102_A Check Discharge Pressure Check Check No.18 Discharge pressure check High? Replace the compressor. Is the stop valve open? Open the stop valve. Is the connection pipe Replace the pipe installed at deformed? the site. Is the air Dirty filter or indoor / outdoor Clean the dirty one. -
Page 104: Main Circuit Short Check
Check SiBE041102_A 5.11 Main Circuit Short Check Check No.20 Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx. 0 V before checking. Measure the resistance between the pins of the DB1 as below. If the resistance is ∞... -
Page 105: Part 7 Removal Procedure
SiBE041102_A Part 7 Removal Procedure 1. Indoor Unit.....................96 1.1 Removal of Air Filters ................96 1.2 Removal of Horizontal Blade..............98 1.3 Removal of Front Panel................100 1.4 Removal of Front Grille ................101 1.5 Removal of Electrical Box / Vertical Blades .........102 1.6 Removal of Swing Motor / PCBs ............107 1.7 Removal of Indoor Heat Exchanger .............111 1.8 Removal of Fan Rotor / Fan Motor............114 1.9 Exchange of Drain Hose (Piping Direction)..........117... -
Page 106: Indoor Unit
Indoor Unit SiBE041102_A 1. Indoor Unit Removal of Air Filters Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Appearance features Warning Dangerous: High voltage A high voltage is applied to all the electric circuits of this product including... - Page 107 SiBE041102_A Indoor Unit Step Procedure Points Pull out the air filter downward and remove (R11620) 3. Remove the Titanium apatite photocatalytic air-purifying filters. Air filter The Titanium apatite photocatalytic air- Titanium apatite purifying filter is photocatalytic attached to the back of air-purifying filter the air filter.
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Page 108: Removal Of Horizontal Blade
Indoor Unit SiBE041102_A Removal of Horizontal Blade Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Open the horizontal blade. Horizontal blade (R11622) Unfasten the center The center shaft can be shaft while bending the released easily by bending... - Page 109 SiBE041102_A Indoor Unit Step Procedure Points Remove the horizontal blade. (R11626) Removal Procedure...
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Page 110: Removal Of Front Panel
Indoor Unit SiBE041102_A Removal of Front Panel Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Open the front panel Right side over the position where it stops. -
Page 111: Removal Of Front Grille
SiBE041102_A Indoor Unit Removal of Front Grille Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 screws, Front grille which fix the front grille to the main body. -
Page 112: Removal Of Electrical Box / Vertical Blades
Indoor Unit SiBE041102_A Removal of Electrical Box / Vertical Blades Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Disconnect the connecting Preparation Service cover wires. - Page 113 SiBE041102_A Indoor Unit Step Procedure Points Loosen the screws of Connecting wires Terminal board the terminal board and black (1) ----- power supply disconnect the white (2) ----- power supply connecting wires. red (3) ----- transmission yellow / green ( ----- earth Connecting wires...
- Page 114 Indoor Unit SiBE041102_A Step Procedure Points Disconnect the [S7] connectors for the fan motor [S1] [S7]. Hook Release the fan motor harnesses from the hook. [S1] (R14602) (R14601) Remove the screw of the electrical box. (R12048) Slide the electrical box to the right first and detach the horizontal blade from the electrical...
- Page 115 SiBE041102_A Indoor Unit Step Procedure Points 3. Remove the vertical blade Narrow the edges of the Hook ASSY. hook to unfasten it. Unfasten the right and Hook left hooks of the fan Hook guard with pliers. (R11646) (R14608) Fan guard Unfasten the 4 hooks at Repeat the same procedure the bottom.
- Page 116 Indoor Unit SiBE041102_A Step Procedure Points Unfasten the 3 hooks at the shaft mounting part by pressing them with a flat screwdriver. Hook (R8022) Remove the vertical Repeat the same procedure blade ASSY. to remove the vertical blade ASSY on the other side. (R8023) Removal Procedure...
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Page 117: Removal Of Swing Motor / Pcbs
SiBE041102_A Indoor Unit Removal of Swing Motor / PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the shield plate Preparation Shield plate (2) (2). - Page 118 Indoor Unit SiBE041102_A Step Procedure Points Unfasten the hook, and The connector of the swing disconnect the motor has a hook. connector. Press the hook with a flat screwdriver to unfasten it. (R11651) 3. Remove the display PCB. Unfasten the hook, and release the display PCB ASSY.
- Page 119 SiBE041102_A Indoor Unit Step Procedure Points Disconnect the connector [S27] from the display PCB. The figure shows the [S27]: for control PCB component parts of the [S27] display PCB. Operation lamp ON/OFF button (Forced cooling operation ON/OFF button) Signal receiver TIMER lamp (R14604) 4.
- Page 120 Indoor Unit SiBE041102_A Step Procedure Points Disconnect the 1 : black, upper terminals from the 2 : white, lower terminal board with 3 : red, upper pliers. : green without sleeve (upper) green with sleeve (lower) (R14609) Release the 4 hooks. Hook Lift up the upper part of the control PCB and...
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Page 121: Removal Of Indoor Heat Exchanger
SiBE041102_A Indoor Unit Removal of Indoor Heat Exchanger Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Disconnect the refrigerant Preparation piping. Remove the electrical box according to the “Removal Remove the screws of Electrical Box / Vertical... - Page 122 Indoor Unit SiBE041102_A Step Procedure Points Disconnect the flare nut for liquid piping with 2 wrenches. (R8018) 2. Remove the indoor heat exchanger. Remove the indoor unit from the installation plate. Liquid piping Gas piping (R8019) Unfasten the hook of the piping fixture on the Auxiliary piping Piping fixture...
- Page 123 SiBE041102_A Indoor Unit Step Procedure Points Widen the auxiliary piping to the extent of Auxiliary piping 10° ~ 20°. Remove the screw on the left side and Caution Hook Hook unfasten the hook on When removing or the rear side. reassembling the indoor heat exchanger, be sure to wear gloves or wrap it with cloth...
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Page 124: Removal Of Fan Rotor / Fan Motor
Indoor Unit SiBE041102_A Removal of Fan Rotor / Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side Preparation panel. Remove the indoor heat exchanger according to the Remove the screw of... - Page 125 SiBE041102_A Indoor Unit Step Procedure Points 2. Remove the fan rotor and the fan motor. Fan rotor The fan motor has 3 projections. The fan rotor has a rotating shaft on the left Fan motor side. (R14541) Remove the fan rotor. (R14542) Press the bearing from outside.
- Page 126 Indoor Unit SiBE041102_A Step Procedure Points Loosen the lock screw When reassembling the fan and remove the fan Lock screw rotor, provide as much as motor. 5 mm of play between the side face of the rotor and the bottom frame. Side face of bottom frame Side face of rotor...
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Page 127: Exchange Of Drain Hose (Piping Direction)
SiBE041102_A Indoor Unit Exchange of Drain Hose (Piping Direction) Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the heat insulation fixing screw Drain hose on the right side and remove the drain hose. -
Page 128: Outdoor Unit
Outdoor Unit SiBE041102_A 2. Outdoor Unit Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Appearance features (R10707) Take care not to cut your finger by the fins of the outdoor heat exchanger. - Page 129 SiBE041102_A Outdoor Unit Step Procedure Points Remove the 3 screws (right: 1 screw, left: 2 Top panel screws) and remove the top panel. Remove the 5 screws of the front panel. Front panel (R14486) Unfasten the right side hooks. (R14487) Unfasten the left side hooks and remove the front panel.
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Page 130: Removal Of Outdoor Fan / Fan Motor
Outdoor Unit SiBE041102_A Removal of Outdoor Fan / Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the outdoor fan. Preparation Mark Remove the panels Remove the nut of the according to the “Removal... - Page 131 SiBE041102_A Outdoor Unit Step Procedure Points Remove the screw and When reassembling, put the Fan motor fixing frame remove the fan motor fan motor lead wire through fixing frame. the back of the fan motor so as not to be entangled with the outdoor fan.
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Page 132: Removal Of Electrical Box / Pcb
Outdoor Unit SiBE041102_A Removal of Electrical Box / PCB Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the PCB. Preparation Remove the panels Remove the screws according to the “Removal and release the... - Page 133 SiBE041102_A Outdoor Unit Step Procedure Points Remove the screw on the rear side of the right side panel. Right side panel (R14498) Remove the 4 screws on the right side panel. (R14499) Unfasten the hook on When reassembling, make the rear side. sure to fit the hook.
- Page 134 Outdoor Unit SiBE041102_A Step Procedure Points Unfasten the hook, and remove the right side panel. Right side panel (R14502) Hook Pull out the terminals 1 : black, upper White from the terminal board 2 : white, lower except the earth. 3 : red, upper : green, lower Earth...
- Page 135 SiBE041102_A Outdoor Unit Step Procedure Points Disconnect the [S20]: electronic expansion [S90] [S40] [S20] connector [S20], [S40], valve coil [S90]. [S40]: overload protector [S90]: thermistors (R14506) Release the harnesses of [S20], [S40], [S90] from the groove. (R14507) Disconnect the Reactor Brown terminals of the reactor.
- Page 136 Outdoor Unit SiBE041102_A Step Procedure Points Release the harnesses of the relay connector and the reactor from the groove. (R14510) Release the lead wires of the power supply and the earth from the groove. (R14581) Remove the electrical Electrical box cover box cover and insulation sheet.
- Page 137 SiBE041102_A Outdoor Unit Step Procedure Points Remove the 5 screws. (R14512) Unfasten the hook. (R14513) Remove the PCB. (R14514) Refer to page 8 for detail. [S90] [S40] [S20] [S80] [S70] [S20]: electronic expansion valve coil [S40]: overload protector [S70]: fan motor [S80]: four way valve coil [S90]: thermistors (R14515)
- Page 138 Outdoor Unit SiBE041102_A Step Procedure Points 2. Remove the electrical box. Remove the electrical Electrical box box. (R14516) 3. Remove the reactor. Remove the 4 screws and remove the reactor. Reactor (R14517) 4. Remove the thermistors. Pay attention so as not to lose the fixture.
- Page 139 SiBE041102_A Outdoor Unit Step Procedure Points Cut the clamp. When reassembling, clamp the outdoor heat exchanger thermistor and the harness of the electronic expansion valve coil. (R14519) Release the outdoor Take care not to lose the clip heat exchanger of thermistor. thermistor.
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Page 140: Removal Of Sound Blankets
Outdoor Unit SiBE041102_A Removal of Sound Blankets Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the partition plate. Remove the 3 screws. (R14521) Remove the partition plate. - Page 141 SiBE041102_A Outdoor Unit Step Procedure Points 2. Remove the sound Since the piping ports on the blankets. sound blanket are torn easily, remove the blanket Lift and remove the carefully. sound blanket (top). Sound blanket (top) (R14524) Pull the sound blankets (outer and inner 2) out.
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Page 142: Removal Of Four Way Valve
Outdoor Unit SiBE041102_A Removal of Four Way Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the peripheries. Remove the screw and remove the four way valve coil. - Page 143 SiBE041102_A Outdoor Unit Step Procedure Points Remove the protection Protection bushing bushing. (R14530) Remove the electronic Electronic expansion expansion valve coil. valve coil (R14531) Remove the putty. (R14532) Removal Procedure...
- Page 144 Outdoor Unit SiBE041102_A Step Procedure Points Before working, make sure that the refrigerant Warning gas is empty in the circuit. Be careful not to get yourself Be sure to apply nitrogen burnt with the pipes and replacement when heating other parts that are heated by up the brazed part.
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Page 145: Removal Of Compressor
SiBE041102_A Outdoor Unit Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the four way valve, the terminal Warning cover and disconnect Be careful not to get yourself the terminals of the burnt with the pipes and... -
Page 146: Part 8 Trial Operation And Field Settings
SiBE041102_A Part 8 Trial Operation and Field Settings 1. Pump Down Operation................137 2. Forced Cooling Operation ..............138 3. Trial Operation ..................139 4. Field Settings ..................140 4.1 When 2 Units are Installed in 1 Room..........140 4.2 Jumper Settings ...................140 5. Application of Silicon Grease to a Power Transistor and a Diode Bridge ..................141 Trial Operation and Field Settings... -
Page 147: Pump Down Operation
SiBE041102_A Pump Down Operation 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. Detail 1) Remove the valve caps from the liquid stop valve and the gas stop valve. 2) Carry out forced cooling operation. -
Page 148: Forced Cooling Operation
Forced Cooling Operation SiBE041102_A 2. Forced Cooling Operation Item Forced Cooling Conditions The forced cooling operation is allowed when both the following conditions are met. 1) The outdoor unit is not abnormal and not in the 3-minute standby mode. 2) The outdoor unit is not operating. Start Press the forced cooling operation ON/OFF button (SW1) on the indoor unit for 5 seconds. -
Page 149: Trial Operation
SiBE041102_A Trial Operation 3. Trial Operation Outline 1. Measure the power supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating mode. 3. Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as flap movement, are working properly. -
Page 150: Field Settings
Field Settings SiBE041102_A 4. Field Settings When 2 Units are Installed in 1 Room When 2 indoor units are installed in 1 room, 1 of the 2 pairs of indoor unit and wireless remote controller can be set for different address. Both the indoor unit PCB and the wireless remote controller need alteration. -
Page 151: Application Of Silicon Grease To A Power Transistor And A Diode Bridge
SiBE041102_A Application of Silicon Grease to a Power Transistor and a Diode Bridge 5. Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board (PCB) of an outdoor unit is replaced, it is required that silicon grease ( ∗... -
Page 152: Part 9 Appendix
SiBE041102_A Part 9 Appendix 1. Piping Diagrams..................143 1.1 Indoor Unit....................143 1.2 Outdoor Unit ..................144 2. Wiring Diagrams..................145 2.1 Indoor Unit....................145 2.2 Outdoor Unit ..................146 Appendix... -
Page 153: Piping Diagrams
SiBE041102_A Piping Diagrams 1. Piping Diagrams Indoor Unit FTXN25/35KEV1B INDOOR UNIT HEAT EXCHANGER 7.0CuT 4.8CuT THERMISTOR 7.0CuT ON HEAT EXCH. 7.0CuT CROSS FLOW FAN FIELD PIPING (6.4CuT) FAN MOTOR FIELD PIPING 9.5CuT (9.5CuT) REFRIGERANT FLOW COOLING HEATING 4D065938B Appendix... -
Page 154: Outdoor Unit
Piping Diagrams SiBE041102_A Outdoor Unit RXN25KEV1B OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE 7.0CuT THERMISTOR 7.0CuT MOTOR OPERATED VALVE 7.0CuT 6.4CuT 6.4CuT MUFFLER WITH MOTOR FILTER PROPELLER FAN 9.5CuT FOUR WAY VALVE ON:HEATING FIELD PIPING (6.4CuT) LIQUID STOP VALVE REFRIGERANT FLOW MUFFLER MUFFLER 9.5CuT FIELD PIPING... -
Page 155: Wiring Diagrams
SiBE041102_A Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTXN25/35KEV1B PCB 2 LED1 FIELD WIRING. PCB 1 LED2 V1TR 3.15A t˚ OUTDOOR C102 MR10 SIGNAL RECEIVER C103 CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN. -
Page 156: Outdoor Unit
Wiring Diagrams SiBE041102_A Outdoor Unit RXN25/35KEV1B FIELD WIRING indoor outdoor NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. C400, C405, C505 : CAPACITOR (OUTDOOR) (DISCHARGE) : DIODE BRIDGE (CONDENSER) FU1,FU2, FU3 : FUSE IPM1 : INTELLIGENT POWER : OVERLOAD PROTECTOR : TERMINAL STRIP MODULE PCB1... - Page 157 Revision History Month / Year Version Revised contents 03/2011 SiBE041102 – 06/2011 SiBE041102_A Review of contents...
- Page 158 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.
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