SiBE041102_A Service Manual Inverter Pair Wall Mounted Type K-Series [Applied Models] O Inverter Pair : Heat Pump
SiBE041102_A Inverter Pair Wall Mounted Type K-Series zHeat Pump Indoor Unit FTXN25KEV1B FTXN35KEV1B Outdoor Unit RXN25KEV1B RXN35KEV1B i 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...........................................................
SiBE041102_A 2.4 2.5 2.6 2.7 2.8 COMFORT AIRFLOW Operation ...........................................................42 POWERFUL Operation ..........................................................................43 ECONO Operation .................................................................................44 OFF TIMER Operation ...........................................................................45 ON TIMER Operation ............................................................................
SiBE041102_A Part 7 Removal Procedure .......................................................... 95 1. Indoor Unit.............................................................................................96 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Removal of Air Filters .............................................................................96 Removal of Horizontal Blade..................................................................98 Removal of Front Panel...........................................
Introduction SiBE041102_A 1. Introduction 1.1 Safety Cautions Cautions and Warnings Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely. The “ Caution” items can also lead to serious accidents under some conditions if they are not followed.
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. The use of materials for R-22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle as well as an equipment failure.
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. If the power cable and lead wires have scratches or deteriorated, be sure to replace them.
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. only If the unit is not securely mounted, it may fall and cause injury.
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. 1.2 Used Icons Icons are used to attract the attention of the reader to specific information.
SiBE041102_A Part 1 List of Functions 1. Functions.................................................................................................
Functions SiBE041102_A Basic Function Compressor Comfortable Airflow Comfort Control Operation Lifestyle Convenience Functions Inverter (with Inverter Power Control) z Category FTXN25/35KEV1B RXN25/35KEV1B Category FTXN25/35KEV1B RXN25/35KEV1B 1.
SiBE041102_A Part 2 Specifications 1. Specifications ..........................................................................................
Specifications SiBE041102_A 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit Model FTXN25KEV1B RXN25KEV1B Outdoor Unit Capacity Rated (Min. ~ Max.) Moisture Removal Running Current (Rated) Power Consumption Rated (Min. ~ Max.) Power Factor (Rated) COP Rated (Min. ~ Max.) Liquid Piping Connections Gas Drain Heat Insulation Max. Interunit Piping Length Max.
SiBE041102_A Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit...............................................................................................6 2. Outdoor Unit............................................................................................
Indoor Unit SiBE041102_A 1.
SiBE041102_A PCB Detail Indoor Unit PCB (1): Control PCB JB JC JA LED_A S26 F1U S6 S21 FG S32 S7 S1 H3 H2 V1 H1 2P270085-1 PCB (2): Display PCB S27 SW1 LED2 LED1 (Solder side) RTH1 3P206563-1 Printed Circuit Board Connector Wiring Diagram 7
Outdoor Unit SiBE041102_A 2.
SiBE041102_A Part 4 Function and Control 1. Main Functions......................................................................................10 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 Temperature Control ..............................................................................10 Frequency Principle................................................................................10 Airflow Direction Control.........................................................................
Main Functions SiBE041102_A 1. Main Functions 1.1 Temperature Control Definitions of Temperatures The definitions of temperatures are classified as following.
SiBE041102_A Drawing of Inverter Main Functions The following drawing shows a schematic view of the inverter principle: Refrigerant circulation rate (high) AC power Amount of heat exchanged air (small) DC power high speed Amount of heat exchanged air (large) high f low f low speed 50 Hz freq= constant 60 Hz freq=variable Amount of heat exchanged air (large) Amount of heat exchanged air (small) capacity= variable Refrigerant circulation rate (low) Inverter Features (R2812) The inverter provid
Main Functions 1.3 SiBE041102_A Airflow Direction Control Power-Airflow Flap 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. 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. Heating Mode During heating mode, the large flap directs airflow downwards to spread the warm air to the entire room.
SiBE041102_A 1.4 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. This is done through phase control and Hall IC control. For more information about Hall IC, refer to the troubleshooting for fan motor on page 57.
Main Functions 1.5 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.
SiBE041102_A 1.6 Main Functions Automatic Operation Outline Detail 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.
Main Functions 1.7 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. The operation turns on in any zones except A.
SiBE041102_A 1.8 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.
Main Functions 1.9 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. It is easily activated from the wireless remote controller by pushing the ECONO button. When this function is activated, the maximum capacity also decreases.
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. Operation mode Fan speed Target temperature COOL DRY H tap + 50 rpm Dry rotating speed + 50 rpm 18°C Lowered by 2.
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. ∗The cold air blast is also prevented using a similar control when the defrosting operation is started or when the thermostat is turned ON. 1.11.
SiBE041102_A Function of Thermistor 2. Function of Thermistor Electronic expansion valve (1) (3) Four way valve (2) Compressor (R14247) (1) Outdoor Heat Exchanger Thermistor 1. The outdoor heat exchanger thermistor is used for controlling target discharge pipe temperature.
Control Specification SiBE041102_A 3. Control Specification 3.1 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.
SiBE041102_A 3.2 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. Frequency initial setting 4.
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. Temperature difference ∆D signal Temperature difference ∆D signal Temperature difference ∆D signal Temperature difference ∆D signal –2.0 0 4 2.0 8 4.0 C –1.5 ∗Th OFF 1 0.5 5 2.5 9 4.5 D –1.0 –0.5 2 3 1.0 1.5 6 7 3.0 3.5 A B 5.0 5.
SiBE041102_A 3.3 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.
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 C B A D E (sec.) Time F (R13528) 3.4 Outline A (Hz) B (Hz) 58 72 C (Hz) D (seconds) 90 180 E (seconds) F (seconds) 180 10 Discharge Pipe Temperature Control The discharge pipe temperature is used as the internal temperature of the compressor.
SiBE041102_A 3.5 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.
Control Specification 3.6 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.
SiBE041102_A 3.8 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. 3. Fan OFF delay when stopped The outdoor fan is turned OFF 70 seconds after the compressor stops. 4.
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. The system is in heating operation. The compressor operates for 6 minutes.
SiBE041102_A Control Specification 3.11 Electronic Expansion Valve Control During target discharge pipe temperature control When the frequency changes under target discharge pipe temperature control When the disconnection of the discharge pipe thermistor is ascertained When the frequency changes under the control for disconnection of the discharge pipe thermistor Under defrost control The followings are the examples of control which function in each mode by the electronic expansion valve control.
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. 3.11.
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.
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.
SiBE041102_A Part 5 Operation Manual 1. System Configuration............................................................................36 2. Operation Manual..................................................................................37 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Operation Manual Remote Controller ..................................................................................37 AUTO · DRY · COOL · HEAT · FAN Operation ......................................38 Adjusting the Airflow Direction.
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. Providing instructions to the user can reduce requests for servicing by 80%.
SiBE041102_A Operation Manual 2. Operation Manual 2.1 Remote Controller Names of Parts Remote Controller 1 2 7 6 5 8 3 9 10 13 12 11 4 1. Signal transmitter: • It sends signals to the indoor unit. 2. Display (LCD): • It displays the current settings. (In this illustration, each section is shown with its displays on for the purpose of explanation.) 3. ECONO button: ECONO operation (page 15) 4. POWERFUL button: POWERFUL operation (page 14) 5.
Operation Manual 2.2 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. Press and select a operation mode. • Each pressing of the button advances the mode setting in sequence. : AUTO : HEAT : DRY : FAN : COOL 2. Press . •“ ” is displayed on the LCD. • The OPERATION lamp lights up.
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 from “ ” to “ ” plus “ ” “ ” are available. The airflow rate setting is not variable. • Indoor unit quiet operation When the airflow is set to “ ”, the noise from the indoor unit will become quieter. Use this when making the noise quieter.
Operation Manual 2.3 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 • This function is effective while flap is in auto swing mode. Press when the flap has reached the desired position. • The flap will stop moving.
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. If they face the wall, the wall will block off the wind, causing the cooling (or heating) efficiency to drop. CAUTION • Always use a remote controller to adjust the angles of the flap.
Operation Manual 2.4 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. To start COMFORT AIRFLOW operation 1. Press . • The flap position will change, preventing air from blowing directly on the occupants of the room. •“ ” is displayed on the LCD.
SiBE041102_A 2.5 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. •“ ” is displayed on the LCD. To cancel POWERFUL operation 2. Press •“ again. ” is displayed on the LCD.
Operation Manual 2.6 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. To start ECONO operation 1. Press •“ . ” is displayed on the LCD. To cancel ECONO operation 2. Press •“ again. ” disappears from the LCD.
SiBE041102_A 2.7 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. Press . “ ” is displayed on the LCD. Each pressing of advances the time setting by 1 hour. The time can be set between 1 to 9 hours. • The TIMER lamp lights up. To cancel OFF TIMER operation 2. Press •“ .
Operation Manual 2.8 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. • The TIMER lamp lights up. To cancel ON TIMER operation 2. Press •“ . ” disappears from the LCD. • The TIMER lamp goes off. To combine ON TIMER and OFF TIMER • A sample setting for combining the 2 timers is shown below. ” and “ ” are displayed on the LCD.
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 ................................
Troubleshooting with LED SiBE041102_A 1. Troubleshooting with LED 1.1 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. 2. When a signal transmission error occurs between the indoor and outdoor units. In either case, conduct the diagnostic procedure described in the following pages. ON/OFF Operation lamp (green) (R14845) Service Monitor 1.
SiBE041102_A Problem Symptoms and Measures 2. Problem Symptoms and Measures Symptom Check Item The unit does not operate. Check the power supply. Check the type of the indoor unit. Check the outdoor temperature. Diagnose with remote controller indication. Operation sometimes stops. Details of Measure Reference Page Check if the rated voltage is supplied. Check if the indoor unit type is compatible with the outdoor unit.
Service Check Function SiBE041102_A 3. Service Check Function Check Method 1 1. When the timer cancel button is held down for 5 seconds, 00 indication is displayed on the temperature display screen. Timer cancel button (R14571) 2. Press the timer cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below. Note: 50 No. Code No. Code No.
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] or beeps or the long beep. button and change the number until you hear the two consecutive (R14573) 3. Diagnose by the sound. beep : The left-side number does not correspond with the error code.
Service Check Function SiBE041102_A 5. Press the [TEMP] or 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. long beep : Both the left-side and right-side numbers correspond with the error code. 7. Determine the error code.
SiBE041102_A Troubleshooting 4. Troubleshooting 4.
Troubleshooting 4.2 SiBE041102_A Indoor Unit PCB Abnormality A1 Remote Controller Display Method of Malfunction Detection The system checks if the circuit works properly within the microcomputer of the indoor unit. Malfunction Decision Conditions The system cannot set the internal settings.
SiBE041102_A 4.3 Troubleshooting Freeze-up Protection Control or Heating Peak-cut Control Remote Controller Display A5 Method of Malfunction Detection Freeze-up protection control Malfunction Decision Conditions Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor.
Troubleshooting SiBE041102_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check No.01 Refer to P.87 Check the air passage. Is there any short circuit? YES Provide sufficient air passage. NO Check the air filter. Is it very dirty? YES Clean the air filter. NO Check the dust accumulation on the indoor heat exchanger. Is it very dirty? YES Clean the indoor heat exchanger. NO Check No.
SiBE041102_A 4.4 Troubleshooting Fan Motor (AC Motor) or Related Abnormality Remote Controller Display A6 Method of Malfunction Detection The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Decision Conditions 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.
Troubleshooting SiBE041102_A Troubleshooting Caution Check No.04 Refer to P.88 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. NO 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. YES Start operation. YES Does the fan rotate? Check No.
SiBE041102_A 4.5 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) Remote Controller Display C4, C9 Method of Malfunction Detection The temperatures detected by the thermistors determine thermistor errors. Malfunction Decision Conditions The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Caution Check No.01 Refer to P.
Troubleshooting 4.6 SiBE041102_A Signal Transmission Error (between Indoor Unit and Outdoor Unit) Remote Controller Display U4 Method of Malfunction Detection The data received from the outdoor unit in indoor unit - outdoor unit signal transmission is checked whether it is normal. Malfunction Decision Conditions The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.
SiBE041102_A Troubleshooting Troubleshooting Caution Check No.11 Refer to P.88 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Voltage as rated? NO Correct the power supply. YES Check the indoor unit - outdoor unit connection wires. Is there any wiring error? YES Correct the indoor unit outdoor unit connection wires. NO Check the voltage of the connection wires on the indoor terminal board between No.
Troubleshooting 4.7 SiBE041102_A Unspecified Voltage (between Indoor Unit and Outdoor Unit) Remote Controller Display UA Method of Malfunction Detection The supply power is detected for its requirements (different from pair type and multi type models) by the indoor / outdoor transmission signal. Malfunction Decision Conditions Pair type and multi type models are interconnected.
SiBE041102_A 4.8 Troubleshooting Outdoor Unit PCB Abnormality Remote Controller Display E1 Method of Malfunction Detection 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 Decision Conditions The IPM sends no signal. The zero-cross signal is not detected.
Troubleshooting 4.9 SiBE041102_A OL Activation (Compressor Overload) Remote Controller Display E5 Method of Malfunction Detection A compressor overload is detected through compressor OL. Malfunction Decision Conditions If the error repeats, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error ∗ The operating temperature condition is not specified.
SiBE041102_A Troubleshooting 4.10 Compressor Lock Remote Controller Display E6 Method of Malfunction Detection A compressor lock is detected by the current waveform generated when applying highfrequency voltage to the motor. Malfunction Decision Conditions If the error repeats, the system is shut down. Reset condition: Continuous run for about 11 minutes without any other error Supposed Causes Compressor locked Disconnection of compressor harness Troubleshooting Caution Check No.
Troubleshooting SiBE041102_A 4.11 Input Overcurrent Detection Remote Controller Display E8 Method of Malfunction Detection An input overcurrent is detected by checking the input current value with the compressor running. Malfunction Decision Conditions The current exceeds about 8.5 ~ 10.5 A for 2.5 seconds with the compressor running.
SiBE041102_A Troubleshooting 4.12 Four Way Valve Abnormality Remote Controller Display EA Method of Malfunction Detection The room temperature thermistor, the indoor heat exchanger thermistor, the outdoor temperature thermistor, and the outdoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode. Malfunction Decision Conditions Cooling / Dry A following condition continues over 10 minutes after operating for 5 minutes. (room thermistor temp.
Troubleshooting SiBE041102_A Troubleshooting Caution Check No.01 Refer to P.87 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Four way valve coil disconnected (loose)? YES Correct it. NO Check No.13 Refer to P.90 Harness out of connector? YES Reconnect it. NO Check No.14 Refer to P.90 Check the continuity of the four way valve coil and harness. Disconnect the harness from the connector.
SiBE041102_A Troubleshooting 4.13 Discharge Pipe Temperature Control Remote Controller Display F3 Method of Malfunction Detection An error is determined with the temperature detected by the discharge pipe thermistor. Malfunction Decision Conditions If the temperature detected by the discharge pipe thermistor rises above A °C, the compressor stops. The error is cleared when the discharge pipe temperature has dropped below B °C.
Troubleshooting SiBE041102_A 4.14 High Pressure Control in Cooling Remote Controller Display F6 Method of Malfunction Detection High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Malfunction Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above about 60°C. The error is cleared when the temperature drops below about 50°C.
SiBE041102_A Troubleshooting 4.15 Compressor System Sensor Abnormality Remote Controller Display H0 Method of Malfunction Detection The system checks the DC current before the compressor starts. Malfunction Decision Conditions The DC current before compressor start-up is out of the range 0.5 ~ 4.5 V (sensor output Supposed Causes Broken or disconnected harness Defective outdoor unit PCB converted to voltage value) The DC voltage before compressor start-up is below 50 V.
Troubleshooting SiBE041102_A 4.16 Position Sensor Abnormality Remote Controller Display H6 Method of Malfunction Detection A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Decision Conditions The compressor fails to start in about 15 seconds after the compressor run command signal Supposed Causes 72 is sent. If the error repeats, the system is shut down.
SiBE041102_A Troubleshooting Troubleshooting Caution Check No.15 Refer to P.91 Check No.18 Refer to P.93 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power. Check the power supply voltage. Voltage as rated? Check No.20 Refer to P.94 NO Correct the power supply. YES Check No. 18 Check the discharge pressure. OK? NO Replace the stop valve. YES Check No. 20 Check the short circuit of the diode bridge.
Troubleshooting SiBE041102_A 4.17 DC Voltage / Current Sensor Abnormality Remote Controller Display H8 Method of Malfunction Detection DC voltage or DC current sensor abnormality is identified based on the compressor running frequency and the input current. Malfunction Decision Conditions The compressor running frequency is above 52 Hz. Supposed Causes Defective outdoor unit PCB (The input current is also below 0.1 A.) If the error repeats, the system is shut down.
SiBE041102_A Troubleshooting 4.18 Thermistor or Related Abnormality (Outdoor Unit) Remote Controller Display H9, J3, J6, P4 Method of Malfunction Detection This fault is identified based on the thermistor input voltage to the microcomputer. A thermistor fault is identified based on the temperature sensed by each thermistor. Malfunction Decision Conditions The thermistor input voltage is above 4.96 V or below 0.04 V with the power on.
Troubleshooting Troubleshooting SiBE041102_A In case of “H9” “J3” “J6” Caution Check No.01 Refer to P.87 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn on the power again. Error displayed again on remote controller? NO Reconnect the connectors or thermistors. YES Check No. 01 Check the thermistor resistance value. Normal? J3 error: the discharge pipe temperature is lower than the heat exchanger temperature.
SiBE041102_A Troubleshooting 4.19 Electrical Box Temperature Rise Remote Controller Display L3 Method of Malfunction Detection An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Malfunction Decision Conditions 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.
Troubleshooting SiBE041102_A Troubleshooting Caution Check No.17 Refer to P.92 Check No.19 Refer to P.93 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. WARNING To cool the electrical components, the outdoor fan starts when the radiation fin temperature rises above C ˚C and stops when it drops below B ˚C. Turn off the power and turn it on again. YES Error again or outdoor fan activated? NO Check the radiation fin temperature.
SiBE041102_A Troubleshooting 4.20 Radiation Fin Temperature Rise Remote Controller Display L4 Method of Malfunction Detection A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on. Malfunction Decision Conditions Supposed Causes Service Diagnosis 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.
Troubleshooting SiBE041102_A Troubleshooting Caution Check No.17 Refer to P.92 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Turn off the power and turn it on again to start the system. Check No.19 Refer to P.93 Error displayed again? YES Has PCB been replaced? NO YES NO ∗ Silicon grease Part No.: 1172698 Check the radiation fin temperature. Above A ˚C? Check if the silicon grease applied properly on the radiation fin.
SiBE041102_A Troubleshooting 4.21 Output Overcurrent Detection Remote Controller Display L5 Method of Malfunction Detection An output overcurrent is detected by checking the current that flows in the inverter DC section. Malfunction Decision Conditions A position signal error occurs while the compressor is running. A speed error occurs while the compressor is running. An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer.
Troubleshooting SiBE041102_A Troubleshooting Caution Check No.15 Refer to P.91 Check No.17 Refer to P.92 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. ∗ 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 wiring again. Check No. 17 Check the installation condition.
SiBE041102_A Troubleshooting 4.22 Refrigerant Shortage Remote Controller Display Method of Malfunction Detection U0 Refrigerant shortage detection I: 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. Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of the electronic expansion valve.
Troubleshooting SiBE041102_A Troubleshooting Caution Check No.01 Refer to P.87 Check No.12 Refer to P.89 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Any thermistor disconnected? NO Stop valve closed? YES Replace them in position. ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗ Room temperature thermistor ∗ Outdoor temperature thermistor YES Open the stop valve. NO Check for refrigerant shortage.
SiBE041102_A Troubleshooting 4.23 Low-voltage Detection or Over-voltage Detection Remote Controller Display Method of Malfunction Detection U2 Indoor Unit Evaluation of zero-cross detection of power supply by the indoor unit PCB. 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.
Troubleshooting SiBE041102_A Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Check the power supply voltage. Voltage as rated? NO Correct the power supply. YES Check the connection of the compressor harness. Loose or disconnected? YES Reconnect it. NO (Precaution before turning on the power again) Make sure the power has been off for at least 30 seconds. Turn on the power again.
SiBE041102_A Check 5. Check 5.1 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. Thermistor temperature (°C) Resistance (kΩ) Room temperature thermistor Other thermistors –20 –15 73.4 57.0 211.0 150.0 –10 –5 44.7 35.3 116.5 88.0 0 5 28.2 22.6 67.2 51.9 10 15 18.3 14.8 40.0 31.
Check 5.2 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 Æ Defective PCB Æ Replace the PCB. If NG in step 2 Æ Defective Hall IC Æ Replace the fan motor. If OK in both steps 1 and 2 Æ Replace the PCB. The connector has 3 pins.
SiBE041102_A 5.4 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. If the EV does not generate a latching sound in the above step 2, disconnect the connector and check the continuity using a tester. 4. Check the continuity between the pins 1 - 6, 2 - 6, 3 - 6, and 4 - 6.
Check 5.5 SiBE041102_A Four Way Valve Performance Check Check No.13 Turn off the power and turn it on again. Start heating operation. S80 voltage at 220 - 240 VAC with compressor on? (Fig. 1) ∗ Four way valve coil Cooling / Dry : No continuity Heating : Continuity NO Replace the outdoor unit PCB. YES Disconnect the four way valve coil from the connector and check the continuity. Four way valve coil resistance at 1000 ~ 2000 Ω? NO Replace the four way valve coil. YES Replace the four way valve.
SiBE041102_A 5.7 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.). The inverter checker makes it possible to judge the cause of trouble easily and securely.
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. (3) If NG in Check No.22, replace the power module (PCB). If OK in Check No.22, check if there is any solder cracking on the PCB. (4) If any solder cracking is found, replace the PCB or repair the soldered section.
SiBE041102_A 5.9 Check Discharge Pressure Check Check No.18 Discharge pressure check High? NO Replace the compressor. YES Is the stop valve open? NO Open the stop valve. YES Is the connection pipe deformed? YES Replace the pipe installed at the site. NO Is the air filter or indoor / outdoor heat exchanger dirty? Not dirty Dirty Clean the dirty one. Replace the compressor. (R11718) 5.10 Outdoor Fan System Check Check No.19 AC motor Check the outdoor fan system.
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 ∞ or less than 1 kΩ, short circuit occurs on the main circuit. ~ (2, 3) + (4) ~ (2, 3) – (1) (+) terminal of the tester (in case of digital, (–) terminal) + (4) ~ (2, 3) – (1) ~ (2, 3) Resistance is OK.
SiBE041102_A Part 7 Removal Procedure 1. Indoor Unit.............................................................................................96 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Removal of Air Filters .............................................................................96 Removal of Horizontal Blade..................................................................98 Removal of Front Panel........................................................................100 Removal of Front Grille .....
Indoor Unit SiBE041102_A 1. Indoor Unit 1.1 Removal of Air Filters Procedure Step Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Appearance features Warning Dangerous: High voltage A high voltage is applied to all the electric circuits of this product including thermistors.
SiBE041102_A Step 3 Indoor Unit Procedure Points Pull out the air filter downward and remove it. (R11620) 3. Remove the Titanium apatite photocatalytic air-purifying filters. 1 The Titanium apatite photocatalytic airpurifying filter is attached to the back of the air filter.
Indoor Unit 1.2 SiBE041102_A Removal of Horizontal Blade Procedure Warning Step 1 Open the horizontal Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points blade. Horizontal blade (R11622) 2 The center shaft can be Unfasten the center shaft while bending the horizontal blade slightly. released easily by bending the blade. (R11623) Cautions for reassembling 1.
SiBE041102_A Step 5 Indoor Unit Procedure Points Remove the horizontal blade.
Indoor Unit 1.3 SiBE041102_A Removal of Front Panel Procedure Warning Step 1 Open the front panel Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Right side over the position where it stops. Front panel Left side (R11627) 2 Release the right rotary shaft. The rotary shaft on each Right side can be released easily by sliding each shaft inwards. Rotary shaft (R11628) 3 Release the left rotary shaft.
SiBE041102_A 1.4 Indoor Unit Removal of Front Grille Procedure Warning Step 1 Remove the 2 screws, Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Front grille which fix the front grille to the main body. (R11631) 2 Refer to the removal The front grille has 3 hooks on the upper part. procedure in a reverse way when reassembling. Hook (R14618) 3 Press each hook, and also lift the grille up to unfasten the hooks.
Indoor Unit 1.5 SiBE041102_A Removal of Electrical Box / Vertical Blades Procedure Step Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure 1. Disconnect the connecting wires. 1 Remove the screw of the service cover. Points Preparation Remove the front grille Service cover according to the “Removal of Front Grille”. (R14600) 2 Pull out the service cover down in the direction of the arrow.
SiBE041102_A Step 5 Indoor Unit Procedure Points Connecting wires Loosen the screws of the terminal board and disconnect the connecting wires. Terminal board Connecting wires black (1) ----- power supply white (2) ----- power supply red (3) ----- transmission yellow / green ( ) ----- earth (R11639) 6 Take care not to lose the clip Pull out the indoor heat exchanger thermistor. Indoor heat exchanger thermistor of thermistor. Clip Thermistor (R11268) (R12045) 2. Remove the electrical box.
Indoor Unit Step 2 SiBE041102_A Procedure Points Disconnect the connectors for the fan motor [S1] [S7]. Release the fan motor harnesses from the hook. [S7] Hook [S1] (R14602) (R14601) 3 Remove the screw of the electrical box. (R12048) 4 Slide the electrical box to the right first and detach the horizontal blade from the electrical box. 5 Pull the electrical box. (R14607) There is a hook on the Bottom frame bottom frame.
SiBE041102_A Step Indoor Unit Procedure 3. Remove the vertical blade ASSY. 1 Unfasten the right and left hooks of the fan guard with pliers. Points Narrow the edges of the Hook hook to unfasten it. Hook Hook (R11646) Fan guard 2 (R14608) Repeat the same procedure Unfasten the 4 hooks at the bottom. Remove the fan guard. to remove the fan guard on the other side. Hook (R11647) The right fan guard has sealing materials on the right side.
Indoor Unit Step 4 SiBE041102_A Procedure Points Unfasten the 3 hooks at the shaft mounting part by pressing them with a flat screwdriver. Hook (R8022) 5 Repeat the same procedure Remove the vertical blade ASSY. to remove the vertical blade ASSY on the other side.
SiBE041102_A 1.6 Indoor Unit Removal of Swing Motor / PCBs Procedure Step Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Remove the shield plate (2). 1 Unfasten the hooks at the upper 2 positions of the shield plate (2). Preparation Shield plate (2) Remove the electrical box according to the “Removal of Electrical Box / vertical Blades”.
Indoor Unit Step 2 SiBE041102_A Procedure Points The connector of the swing Unfasten the hook, and disconnect the connector. motor has a hook. Press the hook with a flat screwdriver to unfasten it. (R11651) 3. Remove the display PCB. 1 Unfasten the hook, and release the display PCB ASSY. Display PCB ASSY (R11652) 2 Turn over the display PCB ASSY, and unfasten the 3 hooks to remove the display PCB.
SiBE041102_A Step Indoor Unit Procedure 3 Disconnect the connector [S27] from the display PCB. 4 The figure shows the component parts of the display PCB. Points [S27]: for control PCB [S27] Operation lamp ON/OFF button (Forced cooling operation ON/OFF button) TIMER lamp Signal receiver (R14604) 4. Remove the control PCB. 1 Lift the shield plate (1) and unfasten the 2 hooks. 2 Hook Slide the shield plate (1) and remove it. Shield plate (1) (R12061) 3 Release the harnesses from the hooks.
Indoor Unit SiBE041102_A Step 4 Procedure Points Disconnect the terminals from the terminal board with pliers. 1 : black, upper 2 : white, lower 3 : red, upper : green without sleeve (upper) green with sleeve (lower) (R14609) 5 Release the 4 hooks. Lift up the upper part of the control PCB and remove it. Hook Control PCB Hook 6 The figure shows the control PCB. S6 (R14610) Refer to page 7 for detail.
SiBE041102_A 1.7 Indoor Unit Removal of Indoor Heat Exchanger Procedure Step Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Disconnect the refrigerant piping. 1 Remove the screws which fix the indoor unit to the installation plate. Preparation Remove the electrical box according to the “Removal of Electrical Box / Vertical Blades”. (R8014) 2 Lift the indoor unit with a wooden base.
Indoor Unit Step 5 SiBE041102_A Procedure Points Disconnect the flare nut for liquid piping with 2 wrenches. (R8018) 2. Remove the indoor heat exchanger. 1 Remove the indoor unit from the installation plate. Liquid piping Gas piping 2 Unfasten the hook of the piping fixture on the back of the indoor unit.
SiBE041102_A Indoor Unit Step 3 4 Procedure Widen the auxiliary piping to the extent of 10° ~ 20°. Remove the screw on the left side and unfasten the hook on the rear side. Points Auxiliary piping Hook Caution When removing or reassembling the indoor heat exchanger, be sure to wear gloves or wrap it with cloth before proceeding to the work. (You may be injured by the fins.) Hook Screw (R11269) 5 Push and unfasten the hook on the right side and lift up the indoor heat exchanger.
Indoor Unit 1.8 SiBE041102_A Removal of Fan Rotor / Fan Motor Procedure Step Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Remove the right side panel. 1 Remove the screw of the right side panel. Preparation Remove the indoor heat exchanger according to the “Removal of Indoor Heat Exchanger”. Right side panel (R8044) 2 Unfasten the hook of the right side panel. Hook 3 (R14539) Remove the right side panel.
SiBE041102_A Step Indoor Unit Procedure 2. Remove the fan rotor and the fan motor. 1 The fan motor has 3 projections. The fan rotor has a rotating shaft on the left side. Points Fan rotor Fan motor (R14541) 2 Remove the fan rotor. (R14542) 3 Press the bearing from outside. 4 Remove the bearing.
Indoor Unit Step 5 SiBE041102_A Procedure Loosen the lock screw and remove the fan motor. Points When reassembling the fan rotor, provide as much as 5 mm of play between the side face of the rotor and the bottom frame. Lock screw Side face of rotor Fan motor Side face of bottom frame 5 mm (R14544) (R2808) (R9582) (1) Insert the fan motor with approx. 5 mm left. (2) Tighten the screw until it stops. Then turn the screw in one scroll.
SiBE041102_A 1.9 Indoor Unit Exchange of Drain Hose (Piping Direction) Procedure Step 1 Remove the heat Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points insulation fixing screw on the right side and remove the drain hose. Drain hose Heat insulation fixing screw (R8054) 2 Remove the drain plug located at the left side with pliers and insert the removed drain plug into the right side with a hexagonal wrench (4 mm).
Outdoor Unit SiBE041102_A 2. Outdoor Unit 2.1 Removal of Outer Panels Procedure Step Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Appearance features (R10707) Take care not to cut your finger by the fins of the outdoor heat exchanger. (R14485) 2. Remove the panels. 1 Remove the screw of the stop valve cover. Pull down the stop valve cover and remove it.
SiBE041102_A Procedure Step 2 3 Outdoor Unit Remove the 3 screws (right: 1 screw, left: 2 screws) and remove the top panel. Points Top panel Remove the 5 screws of the front panel. Front panel 4 (R14486) Unfasten the right side hooks. (R14487) 5 Unfasten the left side hooks and remove the front panel. ER INVERT (R14488) 6 Remove the 4 screws of the discharge grille. 7 Unfasten the 6 hooks and remove the discharge grille.
Outdoor Unit 2.2 SiBE041102_A Removal of Outdoor Fan / Fan Motor Procedure Warning Step Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure 1. Remove the outdoor fan. 1 Remove the nut of the outdoor fan. Points Preparation Remove the panels according to the “Removal of Outer Panels”. Nut size: M6 Mark Outdoor fan 2 Remove the outdoor fan. 10 mm Nut D-cut (R12236) When reassembling, align Shaft (R14490) 2.
SiBE041102_A Procedure Step 3 Outdoor Unit Remove the screw and remove the fan motor fixing frame. Points When reassembling, put the Fan motor fixing frame fan motor lead wire through the back of the fan motor so as not to be entangled with the outdoor fan. Lead wire Outdoor fan (R3249) (R14493) 4 When reassembling, set the Release the fan motor lead wire from the hooks. clamped position under the lower hook of the fan motor fixing flame.
Outdoor Unit 2.3 SiBE041102_A Removal of Electrical Box / PCB Procedure Step Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Remove the PCB. 1 Remove the screws and release the connecting wires. Preparation Remove the panels according to the “Removal of Outer Panels”. (R14496) 2 Remove the 3 screws and remove the wire clamp.
SiBE041102_A Outdoor Unit Procedure Step 5 Points Remove the screw on the rear side of the right side panel. Right side panel (R14498) 6 Remove the 4 screws on the right side panel. 7 Unfasten the hook on the rear side. (R14499) When reassembling, make sure to fit the hook. (R14500) 8 Release the outdoor temperature thermistor from the outdoor heat exchanger.
Outdoor Unit Procedure Step 9 SiBE041102_A Points Unfasten the hook, and remove the right side panel. Right side panel (R14502) Hook 10 Pull out the terminals from the terminal board except the earth. White 1 : black, upper 2 : white, lower 3 : red, upper : green, lower Red Earth Black 11 (R14503) Remove the screw and release the earth. (R14504) 12 Disconnect the connector [S80].
SiBE041102_A Outdoor Unit Procedure Step 13 Disconnect the connector [S20], [S40], [S90]. [S90] [S40] Points [S20]: electronic expansion valve coil [S40]: overload protector [S90]: thermistors [S20] (R14506) 14 Release the harnesses of [S20], [S40], [S90] from the groove. (R14507) 15 Disconnect the terminals of the reactor. Reactor Brown Orange 16 (R14508) Disconnect the relay connector of the compressor.
Outdoor Unit Procedure Step 17 SiBE041102_A Points Release the harnesses of the relay connector and the reactor from the groove. (R14510) 18 Release the lead wires of the power supply and the earth from the groove. (R14581) 19 Remove the electrical box cover and insulation sheet.
SiBE041102_A Procedure Step 20 Outdoor Unit Points Remove the 5 screws. (R14512) 21 Unfasten the hook. (R14513) 22 Remove the PCB. PCB (R14514) [S90] [S40] [S20] [S80] [S70] Refer to page 8 for detail.
Outdoor Unit SiBE041102_A Procedure Step 2. Remove the electrical box. 1 Remove the electrical box. Points Electrical box (R14516) 3. Remove the reactor. 1 Remove the 4 screws and remove the reactor. Reactor (R14517) Pay attention so as not to 4. Remove the thermistors. 1 Release the discharge pipe thermistor. lose the fixture. When reassembling, do not insert the thermistor up to the dent of fixture.
SiBE041102_A Procedure Step 2 Outdoor Unit Points When reassembling, clamp Cut the clamp. the outdoor heat exchanger thermistor and the harness of the electronic expansion valve coil. (R14519) 3 Take care not to lose the clip Release the outdoor heat exchanger thermistor. of thermistor.
Outdoor Unit 2.4 SiBE041102_A Removal of Sound Blankets Procedure Warning Step Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Remove the partition plate. 1 Remove the 3 screws. (R14521) 2 Remove the partition plate. Partition plate (R14522) When reassembling, fit the lower hook into the bottom frame.
SiBE041102_A Outdoor Unit Procedure Step Points Since the piping ports on the 2. Remove the sound blankets. 1 Lift and remove the sound blanket (top). sound blanket are torn easily, remove the blanket carefully. Sound blanket (top) (R14524) 2 Pull the sound blankets (outer and inner 2) out. Sound blanket (outer) Sound blanket (inner 2) (R14525) 3 Since the piping ports on the Pull the sound blanket (inner 1) out. sound blanket are torn easily, remove the blanket carefully.
Outdoor Unit 2.5 SiBE041102_A Removal of Four Way Valve Procedure Step Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points 1. Remove the peripheries. 1 Remove the screw and remove the four way valve coil. Four way valve coil 2 Remove the terminal cover. (R14527) Terminal cover (R14528) 3 Disconnect the terminals of the compressor. 4 Remove the overload protector.
SiBE041102_A Procedure Step 5 Outdoor Unit Remove the protection bushing. Points Protection bushing (R14530) 6 Remove the electronic expansion valve coil. Electronic expansion valve coil (R14531) 7 Remove the putty.
Outdoor Unit SiBE041102_A Procedure Step Points Before working, make sure that the refrigerant gas is empty in the circuit. Be sure to apply nitrogen replacement when heating up the brazed part. 2. Remove the four way valve. 1 Heat up the brazed point (a) and withdraw the piping with pliers. Warning Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine. (a) Warning If the refrigerant gas leaks during work, ventilate the room.
SiBE041102_A 2.6 Removal of Compressor Procedure Step 1 2 Outdoor Unit Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Remove the four way valve, the terminal cover and disconnect the terminals of the compressor so as not to burn them. Warning Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine. Remove the 3 nuts of the compressor.
SiBE041102_A Part 8 Trial Operation and Field Settings 1. 2. 3. 4. Pump Down Operation........................................................................137 Forced Cooling Operation ...................................................................138 Trial Operation ....................................................................................139 Field Settings ......................................................................................140 4.1 When 2 Units are Installed in 1 Room...
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. 3) After 5 to 10 minutes, close the liquid stop valve with a hexagonal wrench. 4) After 2 to 3 minutes, close the gas stop valve and stop the forced cooling operation.
Forced Cooling Operation SiBE041102_A 2. Forced Cooling Operation Item Conditions Forced Cooling 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. Command frequency 58 Hz End The forced cooling operation ends when any of the following conditions is fulfilled.
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. The air conditioner requires a small amount of power in its standby mode.
Field Settings SiBE041102_A 4. Field Settings 4.1 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. Indoor Unit PCB Cut the address setting jumper JA on the control PCB. JA JC JB ADDRESS JA ADDRESS EXIST CUT 1 2 (R14580) Wireless Remote Controller Cut the address setting jumper.
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 Models All outdoor units using inverter type compressor for room air conditioner. When the printed circuit board (PCB) of an outdoor unit is replaced, it is required that silicon grease (∗1) is certainly applied to the heat radiation part (the contact point to the radiation fin) of the power transistor and diode bridge.
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.....................................
SiBE041102_A Piping Diagrams 1. Piping Diagrams 1.1 Indoor Unit FTXN25/35KEV1B INDOOR UNIT 7.0CuT HEAT EXCHANGER 7.0CuT 4.8CuT THERMISTOR ON HEAT EXCH. 7.0CuT 7.0CuT FIELD PIPING (6.4CuT) CROSS FLOW FAN M FAN MOTOR FIELD PIPING (9.5CuT) 9.
Piping Diagrams 1.2 SiBE041102_A Outdoor Unit RXN25KEV1B OUTDOOR UNIT 7.0CuT 7.0CuT 6.4CuT M FAN MOTOR MOTOR OPERATED VALVE 6.4CuT MUFFLER WITH FILTER 6.4CuT HEAT EXCHANGER THERMISTOR 7.0CuT HEAT EXCHANGER OUTDOOR TEMPERATURE 7.0CuT THERMISTOR STRAINER 9.5CuT PROPELLER FAN DISCHARGE PIPE THERMISTOR 4.8CuT FOUR WAY VALVE ON:HEATING 9.5CuT 6.4CuT 9.5CuT LIQUID STOP VALVE MUFFLER MUFFLER 9.5CuT FIELD PIPING (6.4CuT) REFRIGERANT FLOW FIELD PIPING (9.
SiBE041102_A Wiring Diagrams 2. Wiring Diagrams 2.1 Indoor Unit FTXN25/35KEV1B LED1 H1P LED2 H2P PCB 2 FIELD WIRING. S27 1 S1W t˚ R1T 9 SIGNAL RECEIVER BLK BLK BLK BLK BLK BLK BLK BLK BLK S26 9 PCB 1 1 V1TR F1U C102 2 V1 MR10 C103 TRANSMISSION CIRCUIT 1 5 S6 3 1 3 6 1 M M1S OUTDOOR 3 M ~ t˚ M1F CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
Wiring Diagrams 2.2 SiBE041102_A Outdoor Unit RXN25/35KEV1B FIELD WIRING indoor ORG BLK WHT RED HL1 HN1 BRN RED BLU BLK WHT RED GRY BLK BLK BLK BLK BLK BLK BLK RED WHT YLW ORG BLU GRN outdoor YLW GRN GRN/YLW YLW NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS.
Revision History Month / Year Version Revised contents 03/2011 SiBE041102 – 06/2011 SiBE041102_A Review of contents
Warning z Daikin products are manufactured for export to numerous countries throughout the world. Prior to purchase, please confirm with your local authorised importer, distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for use, in the region where the product will be used. This statement does not purport to exclude, restrict or modify the application of any local legislation. z Ask a qualified installer or contractor to install this product.
