Page 1 SiBE041101 Service Manual Inverter Pair Wall Mounted Type J-Series [Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump...
Page 2 SiBE041101 Inverter Pair Wall Mounted Type J-Series Cooling Only Indoor Unit FTXS20J2V1B FTXS25J2V1B FTXS35J2V1B FTXS42J2V1B FTXS50J2V1B Outdoor Unit RKS20J2V1B RKS25J2V1B RKS35J2V1B RKS42J2V1B RKS50J2V1B Heat Pump Indoor Unit FTXS20J2V1B FTXS25J2V1B FTXS35J2V1B FTXS42J2V1B FTXS50J2V1B Outdoor Unit RXS20J2V1B RXS25J2V1B RXS35J2V1B RXS42J2V1B RXS50J2V1B Table of Contents...
Page 3: Table Of Contents
SiBE041101 1. Introduction .................... vi 1.1 Safety Cautions ..................vi 1.2 Used Icons ....................x Part 1 List of Functions ..............1 1. Functions....................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................3 Part 2 Specifications ..............4 1. Specifications ..................5 1.1 Cooling Only.....................5 1.2 Heat Pump ....................7 Part 3 Printed Circuit Board Connector Wiring Diagram ...
Page 4 SiBE041101 Part 5 Operation Manual ............. 49 1. System Configuration................50 2. Operation Manual..................51 2.1 Remote Controller ..................51 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........52 2.3 Adjusting the Airflow Direction..............54 2.4 COMFORT AIRFLOW and INTELLIGENT EYE Operation....56 2.5 POWERFUL Operation ................60 2.6 OUTDOOR UNIT QUIET Operation............61 2.7 ECONO Operation .................62...
Page 5 SiBE041101 5.2 Electronic Expansion Valve Check............123 5.3 Four Way Valve Performance Check ...........124 5.4 Thermistor Resistance Check ..............125 5.5 Installation Condition Check..............126 5.6 Discharge Pressure Check..............126 5.7 Outdoor Fan System Check ..............127 5.8 Power Supply Waveforms Check............127 5.9 Inverter Units Refrigerant System Check ..........127 5.10 Capacitor Voltage Check..............128 5.11 Power Module Check ................128 5.12 “Inverter Checker”...
Page 6 SiBE041101 Part 8 Trial Operation and Field Settings......... 238 1. Pump Down Operation................239 2. Forced Cooling Operation ..............240 3. Trial Operation ..................242 4. Field Settings ..................243 4.1 Model Type Setting ................243 4.2 When 2 Units are Installed in 1 Room..........243 4.3 Standby Electricity Saving..............244 4.4 Facility Setting Jumper and Switch (cooling at low outdoor temperature)............245...
Page 7: Introduction
SiBE041101 Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
Page 8 Introduction SiBE041101 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 9 SiBE041101 Introduction 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 10 Introduction SiBE041101 Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug has dust or loose connection, it may cause an electrical shock or fire. Be sure to install the product correctly by using the provided standard For unitary type installation frame.
Page 11: Used Icons
SiBE041101 Introduction Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause the water to enter the room and wet the furniture and floor.
Page 12: Part 1 List Of Functions
SiBE041101 Part 1 List of Functions 1. Functions....................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................3 List of Functions...
Page 13: Functions
SiBE041101 Functions 1. Functions Cooling Only Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — ★ ★ Operation Limit for Heating (°CWB) —...
Page 14: Heat Pump
Functions SiBE041101 Heat Pump Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — Air-Purifying Filter with Photocatalytic – – Operation Limit for Heating (°CWB) —...
Page 15: Part 2 Specifications
SiBE041101 Part 2 Specifications 1. Specifications ..................5 1.1 Cooling Only.....................5 1.2 Heat Pump ....................7 Specifications...
Page 16: Specifications
Specifications SiBE041101 1. Specifications Cooling Only 50 Hz, 220 - 230 - 240 V Indoor Unit FTXS20J2V1B FTXS25J2V1B FTXS35J2V1B Model Outdoor Unit RKS20J2V1B RKS25J2V1B RKS35J2V1B 2.0 (1.3 ~ 2.8) 2.5 (1.3 ~ 3.2) 3.5 (1.4 ~ 4.0) Capacity Btu/h 6,800 (4,400 ~ 9,600) 8,500 (4,400 ~ 10,900) 11,900 (4,800 ~ 13,600) Rated (Min.
Page 17 SiBE041101 Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXS42J2V1B FTXS50J2V1B Model Outdoor Unit RKS42J2V1B RKS50J2V1B 4.2 (1.7 ~ 5.0) 5.0 (1.7 ~ 5.3) Capacity Btu/h 14,300 (5,800 ~ 17,100) 17,100 (5,800 ~ 18,100) Rated (Min. ~ Max.) kcal/h 3,010 (1,460 ~ 4,300) 4,300 (1,460 ~ 4,560)
Page 18: Heat Pump
Specifications SiBE041101 Heat Pump 50 Hz, 220 - 230 - 240 V Indoor Unit FTXS20J2V1B Model RXS20J2V1B Outdoor Unit Cooling Heating 2.0 (1.3 ~ 2.8) 2.7 (1.3 ~ 4.3) Capacity Btu/h 6,800 (4,400 ~ 9,600) 9,200 (4,400 ~ 14,700) Rated (Min. ~ Max.) kcal/h 1,720 (1,120 ~ 2,410) 2,320 (1,120 ~ 3,700)
Page 19 SiBE041101 Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXS25J2V1B FTXS35J2V1B Model RXS25J2V1B RXS35J2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.2) 3.3 (1.3 ~ 4.7) 3.5 (1.4 ~ 4.0) 4.0 (1.4 ~ 5.2) Capacity Btu/h 8,500 (4,400 ~ 10,900) 11,600 (4,400 ~ 16,000)
Page 20 Specifications SiBE041101 50 Hz, 220 - 230 - 240 V Indoor Unit FTXS42J2V1B FTXS50J2V1B Mode RXS42J2V1B RXS50J2V1B Outdoor Unit Cooling Heating Cooling Heating 4.2 (1.7 ~ 5.0) 5.4 (1.7 ~ 6.0) 5.0 (1.7 ~ 5.3) 5.8 (1.7 ~ 6.5) Capacity Btu/h 14,300 (5,800 ~ 17,100) 18,400 (5,800 ~ 20,500)
Page 21: Part 3 Printed Circuit Board Connector Wiring Diagram
SiBE041101 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit.....................11 2. Outdoor Unit..................14 2.1 RK(X)S20/25/35J2V1B................14 2.2 RK(X)S42J2V1B..................16 2.3 RK(X)S50J2V1B..................18 Printed Circuit Board Connector Wiring Diagram...
Page 22: Indoor Unit
Indoor Unit SiBE041101 1. Indoor Unit Connectors and PCB (1): Control PCB Other Parts 1) S1 Connector for DC fan motor 2) S21 Connector for centralized control (HA) 3) S25 Connector for INTELLIGENT EYE sensor PCB 4) S32 Indoor heat exchanger thermistor 5) S41 Connector for swing motors 6) S46...
Page 23 SiBE041101 Indoor Unit PCB Detail PCB (1): Control PCB LED A 2P206687-1 Printed Circuit Board Connector Wiring Diagram...
Page 24 Indoor Unit SiBE041101 PCB (2): Signal Receiver PCB 3P210728-1 PCB (3): Display PCB RTH1 LED3 LED2 LED1 3P210728-1 PCB (4): INTELLIGENT EYE Sensor PCB 3EB86013-1 Printed Circuit Board Connector Wiring Diagram...
Page 25: Outdoor Unit
SiBE041101 Outdoor Unit 2. Outdoor Unit RK(X)S20/25/35J2V1B Connectors and PCB (1): Filter PCB Other Parts 1) S11 Connector for main PCB 2) AC1, AC2, S Connector for terminal board 3) E1, E2 Terminal for earth 4) HL2, HN2 Connector for main PCB 5) HR1 Connector for reactor 6) FU1...
Page 26 Outdoor Unit SiBE041101 PCB Detail PCB (1): Filter PCB E1, E2 (on main PCB) 3P254234-1 PCB (2): Main PCB U VW J5 J4 S90 LED A S100 S50 2P254206-1 PCB (3): Forced Operation Button PCB S110 3P255755-1 Printed Circuit Board Connector Wiring Diagram...
Page 27: Rk(X)S42J2V1B
SiBE041101 Outdoor Unit RK(X)S42J2V1B 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) U, V, W Connector for compressor...
Page 28 Outdoor Unit SiBE041101 PCB Detail HN1 HL1 LED A U, V, W 2P208173-1 Printed Circuit Board Connector Wiring Diagram...
Page 29: Rk(X)S50J2V1B
SiBE041101 Outdoor Unit RK(X)S50J2V1B Connectors and PCB (1): Main PCB Other Parts 1) S10 Connector for terminal board (indoor-outdoor transmission) 2) S20 Connector for electronic expansion valve coil 3) S40 Connector for overload protector 4) S51, S101 Connector for service monitor PCB 5) S70 Connector for fan motor 6) S80...
Page 30 Outdoor Unit SiBE041101 PCB Detail PCB (1): Main PCB S101 2P169046-5 PCB (2): Service Monitor PCB LED A SW4-B SW4-C S102 3P169059-1 Printed Circuit Board Connector Wiring Diagram...
Page 31: Part 4 Function And Control
SiBE041101 Part 4 Function and Control 1. Main Functions..................21 1.1 Temperature Control ................21 1.2 Frequency Principle................21 1.3 Airflow Direction Control.................23 1.4 Fan Speed Control for Indoor Units............24 1.5 Program Dry Operation ................25 1.6 Automatic Operation................26 1.7 Thermostat Control.................27 1.8 NIGHT SET Mode ..................28 1.9 ECONO Operation .................29 1.10 2-Area INTELLIGENT EYE Operation ...........30 1.11 Inverter POWERFUL Operation .............32...
Page 32: Main Functions
Main Functions SiBE041101 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 33 SiBE041101 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)
Page 34: Airflow Direction Control
Main Functions SiBE041101 Airflow Direction Control Power-Airflow The large flaps send a large volume of air downwards to the floor and provide an optimum control in cooling, dry, and heating mode. Dual Flaps Cooling / Dry Mode During cooling or dry mode, the flap retracts into the indoor unit. Then, cool air can be blown far and pervaded all over the room.
Page 35: Fan Speed Control For Indoor Units
SiBE041101 Main Functions Fan Speed Control for Indoor Units 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 36: Program Dry Operation
Main Functions SiBE041101 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 37: Automatic Operation
SiBE041101 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 38: Thermostat Control
Main Functions SiBE041101 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 39: Night Set Mode
SiBE041101 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 40: Econo Operation
Main Functions SiBE041101 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 41: 2-Area Intelligent Eye Operation
SiBE041101 Main Functions 1.10 2-Area INTELLIGENT EYE Operation Outline The following functions can be performed by a motion sensor (INTELLIGENT EYE). 1. Reduction of the capacity when there is nobody in the room in order to save electricity (energy saving operation) 2.
Page 42 Main Functions SiBE041101 2. Motions (for example: in cooling) within 20 minutes 20 min. 20 min. Human detection signal RESET. (From area A or B) Target temperature INTELLIGENT EYE lamp Remote controller INTELLIGENT EYE button Operation Set speed Set speed Fan speed ( 1) (R12183) When the microcomputer does not have a signal from the sensor in 20 minutes, it judges...
Page 43: Inverter Powerful Operation
SiBE041101 Main Functions 1.11 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 44: Other Functions
Main Functions SiBE041101 1.12 Other Functions 1.12.1 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 45: Function Of Thermistor
SiBE041101 Function of Thermistor 2. Function of Thermistor Cooling Only Electronic expansion valve Compressor (R11611) Heat Pump Electronic expansion valve Four way valve Compressor (R11591) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge pipe Exchanger temperature.
Page 46: Control Specification
Control Specification SiBE041101 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 providing service. Detail For Cooling Only Model There are following modes; stop and cooling (including drying). Air conditioner control mode Forced operating mode Forced cooling (for Pump Down Operation)
Page 47: Frequency Control
SiBE041101 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 48 Control Specification SiBE041101 2. Determine upper limit frequency The minimum value is set as an upper limit frequency among the frequency upper limits of the following functions: Compressor protection, input current, discharge pipe temperature, heating peak-cut, freeze- up protection, defrost. 3.
Page 49: Controls At Mode Changing / Start-Up
SiBE041101 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. Detail RK(X)S20/25/35J2V1B Outdoor temperature ≥...
Page 50 Control Specification SiBE041101 3.3.2 Four Way Valve Switching Outline In heating operation, current is conducted, and in cooling and defrosting, current is not conducted. In order to eliminate the switching sound when the heating is stopped, as the four way valve coil switches from ON to OFF, the OFF delay switch of the four way valve is carried out after the operation stopped.
Page 51: Discharge Pipe Temperature Control
SiBE041101 Control Specification Discharge Pipe Temperature Control Outline The discharge pipe temperature is used as the internal temperature of the compressor. If the discharge pipe temperature rises above a certain level, the upper limit of frequency is set to keep this temperature from going up further. Detail Stop zone A˚C...
Page 52: Input Current Control
Control Specification SiBE041101 Input Current Control Outline The microcomputer calculates the input current during 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 to the lower limit of control of four way valve operation compensation.
Page 53: Freeze-Up Protection Control
SiBE041101 Control Specification 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 54: Outdoor Fan Control
Control Specification SiBE041101 Outdoor Fan Control 1. Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops. 2. 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.
Page 55: Defrost Control
SiBE041101 Control Specification 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 is determined with the outdoor temperature and the outdoor heat exchanger temperature.
Page 56: Electronic Expansion Valve Control
Control Specification SiBE041101 3.11 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Open Control 1.
Page 57 SiBE041101 Control Specification 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 58 Control Specification SiBE041101 Detail When the starting control (cooling : seconds, heating : seconds) finishes, the detection timer for disconnection of the discharge pipe thermistor ( seconds) starts. When the timer is over, the following adjustment is made. 1. When the operation mode is cooling When the following condition is fulfilled, the discharge pipe thermistor disconnection is ascertained.
Page 59: Malfunctions
SiBE041101 Control Specification 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction may occur in the thermistor. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. 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 60: Part 5 Operation Manual
SiBE041101 Part 5 Operation Manual 1. System Configuration................50 2. Operation Manual..................51 2.1 Remote Controller ..................51 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........52 2.3 Adjusting the Airflow Direction..............54 2.4 COMFORT AIRFLOW and INTELLIGENT EYE Operation....56 2.5 POWERFUL Operation ................60 2.6 OUTDOOR UNIT QUIET Operation............61 2.7 ECONO Operation .................62 2.8 OFF TIMER Operation ................63...
Page 61: System Configuration
SiBE041101 System Configuration 1. System Configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know a clever method of using it.
Page 62: Operation Manual
Operation Manual SiBE041101 2. Operation Manual Remote Controller Remote Controller <Open the front cover> <ARC452A3> 1. Signal transmitter: 10. SWING button: • It sends signals to the indoor unit. • Flaps (horizontal blades) (page 12.) 2. Display (LCD): 11. SWING button: •...
Page 63: Auto · Dry · Cool · Heat · Fan Operation
SiBE041101 Operation Manual AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode.
Page 64 Operation Manual SiBE041101 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 “ ” The airflow rate setting is not variable. “...
Page 65: Adjusting The Airflow Direction
SiBE041101 Operation Manual 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 flaps (horizontal blades) will begin to swing. Right and left airflow direction Press •...
Page 66 Operation Manual SiBE041101 To set the flaps or louvers at desired position • This function is effective while flaps or louvers are in auto swing mode. Press when the flaps or louvers have reached the desired position. • In the 3-D airflow, the flaps and louvers move in turn. •...
Page 67: Comfort Airflow And Intelligent Eye Operation
SiBE041101 Operation Manual COMFORT AIRFLOW and INTELLIGENT EYE Operation COMFORT AIRFLOW and INTELLIGENT EYE 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 68 Operation Manual SiBE041101 To start operation Press and select the desired mode. • Each time the is pressed a different setting option is displayed on the LCD. • By selecting “ ” from the following icons, the air conditioner will be in COMFORT AIRFLOW operation combined with INTELLIGENT EYE operation.
Page 69 SiBE041101 Operation Manual COMFORT AIRFLOW and INTELLIGENT EYE Operation NOTE Notes on COMFORT AIRFLOW operation • The flap position will change, preventing air from blowing directly on the occupants of the room. • POWERFUL operation and COMFORT AIRFLOW operation cannot be used at the same time.
Page 70 Operation Manual SiBE041101 NOTE Note on combination of COMFORT AIRFLOW operation and INTELLIGENT EYE operation • The airflow rate will be set to AUTO. If the upper and lower airflow direction is selected, the COMFORT AIRFLOW operation will be canceled. Priority is given to the function of whichever button is pressed last.
Page 71: Powerful Operation
SiBE041101 Operation Manual POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity. To start POWERFUL operation 1. Press • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.
Page 72: Outdoor Unit Quiet Operation
Operation Manual SiBE041101 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. To start OUTDOOR UNIT QUIET operation 1.
Page 73: Econo Operation
SiBE041101 Operation Manual 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 74: Off Timer Operation
Operation Manual SiBE041101 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 •...
Page 75: On Timer Operation
SiBE041101 Operation Manual ON TIMER Operation ON TIMER Operation To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press • “ ” and setting time are displayed on the LCD. •...
Page 76: Weekly Timer Operation
Operation Manual SiBE041101 2.10 WEEKLY TIMER Operation WEEKLY TIMER Operation Up to 4 timer settings can be saved for each day of the week. It is convenient if the WEEKLY TIMER is set according to the family’s life style. Using in these cases of WEEKLY TIMER An example of WEEKLY TIMER settings is shown below.
Page 77 SiBE041101 Operation Manual WEEKLY TIMER Operation To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C...
Page 78 Operation Manual SiBE041101 6. Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10 minute intervals. • To return to the ON/OFF TIMER mode setting, press • Go to step 9 when setting the OFF TIMER. 7.
Page 79 SiBE041101 Operation Manual WEEKLY TIMER Operation Setting Displays Day and number ON/OFF Time Temperature NOTE Notes on WEEKLY TIMER operation • Do not forget to set the clock on the remote control first. • The day of the week, ON/OFF TIMER mode, time and set temperature (only for ON TIMER mode) can be set with WEEKLY TIMER.
Page 80 Operation Manual SiBE041101 Copy mode • A reservation made once can be copied another day of the week. The whole reservation of the selected day of the week will be copied. Program 1 Program 2 Program 3 Program 4 [Monday] 25˚C 27˚C 6:00...
Page 81 SiBE041101 Operation Manual WEEKLY TIMER Operation 5. Press • The reservation will be copied to the selected day of the week. The whole reservation of the selected day of the week will be copied. • To continue copying the settings to other days of the week, repeat step 4 and step 5.
Page 82 Operation Manual SiBE041101 Confirming a reservation • The reservation can be confirmed. 1. Press • The day of the week and the reservation number of current day will be displayed. Press to select the day of the week and the reservation number to be confirmed. •...
Page 83 SiBE041101 Operation Manual WEEKLY TIMER Operation To delete reservations The individual reservation • Refer to setting mode. (page 24.) When selecting desired mode at step 4 in setting mode, select “blank”. The reservation will be deleted. The reservations for each day of the week •...
Page 84: Part 6 Service Diagnosis
SiBE041101 Part 6 Service Diagnosis 1. Troubleshooting with LED ..............75 1.1 Indoor Unit....................75 1.2 Outdoor Unit ...................75 2. Problem Symptoms and Measures ............76 3. Service Check Function ................77 3.1 ARC452 Series..................77 4. Troubleshooting ..................80 4.1 Error Codes and Description ..............80 4.2 Indoor Unit PCB Abnormality ..............81 4.3 Freeze-up Protection Control or Heating Peak-cut Control....82 4.4 Fan Motor (DC Motor) or Related Abnormality........84...
Page 85 SiBE041101 5.10 Capacitor Voltage Check..............128 5.11 Power Module Check ................128 5.12 “Inverter Checker” Check ..............129 5.13 Rotation Pulse Check on the Outdoor Unit PCB ........131 5.14 Main Circuit Short Check..............132 Service Diagnosis...
Page 86: Troubleshooting With Led
Troubleshooting with LED SiBE041101 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 87: Problem Symptoms And Measures
SiBE041101 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 88: Service Check Function
Service Check Function SiBE041101 3. Service Check Function ARC452 Series 1. When the timer cancel button is held down for 5 seconds, “ 00 ” indication appears on the Check Method 1 temperature display section. Timer cancel button < ARC452 Series > (R13820) 2.
Page 89 SiBE041101 Service Check Function Check Method 2 1. Press the 3 buttons (TEMP▲, TEMP▼, MODE) at the same time. (R8381) The figure of the ten’s place blinks. (R8382) 2. Press the TEMP▲ or ▼ button and change the figure until you hear the sound of “beep” or “pi pi”.
Page 90 Service Check Function SiBE041101 5. Press the TEMP▲ or ▼ button and change the figure until you hear the sound of “beep”. (R8383) 6. Diagnose by the sound. ★ “pi” : The figure of the ten’s place does not accord with the error code. ★...
Page 91: Troubleshooting
SiBE041101 Troubleshooting 4. Troubleshooting Error Codes and Description Reference Error Codes Description Page System Normal — U0★ 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 92: Indoor Unit Pcb Abnormality
Troubleshooting SiBE041101 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 93: Freeze-Up Protection Control Or Heating Peak-Cut Control
SiBE041101 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 94 Troubleshooting SiBE041101 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.06 Check the air passage. Refer to P.125 Is there any short circuit? Provide sufficient air passage. Check the air filter.
Page 95: Fan Motor (Dc Motor) Or Related Abnormality
SiBE041101 Troubleshooting Fan Motor (DC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction 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 96 Troubleshooting SiBE041101 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn off the power supply Refer to P.123 and rotate the fan by hand. Does the fan Replace the indoor rotate smoothly? fan motor.
Page 97: Thermistor Or Related Abnormality (Indoor Unit)
SiBE041101 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 98: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)
Troubleshooting SiBE041101 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 99: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)
SiBE041101 Troubleshooting 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) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction The pair type and multi type are interconnected.
Page 100: Outdoor Unit Pcb Abnormality
Troubleshooting SiBE041101 Outdoor Unit PCB Abnormality 4.8.1 20/25/35 Class Remote Controller Display Method of The system follows the microprocessor program as specified. Malfunction The system checks to see if the zero-cross signal comes in properly. Detection Malfunction The microprocessor program runs out of control. The zero-cross signal is not detected.
Page 101 SiBE041101 Troubleshooting 4.8.2 42/50 Class Remote Controller Display Method of Detection within the program of the microcomputer Malfunction Detection Malfunction The program of the microcomputer is in abnormal running order. Decision Conditions Supposed Defective outdoor unit PCB Noise Causes Momentary fall of voltage Momentary power failure Troubleshooting 42 class...
Page 102 Troubleshooting SiBE041101 Troubleshooting 50 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn on the power again. Error again? Replace the outdoor unit PCB. Check to see if the unit is grounded.
Page 103: Ol Activation (Compressor Overload)
SiBE041101 Troubleshooting OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the error repeats twice, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error Decision ∗...
Page 104: Compressor Lock
Troubleshooting SiBE041101 4.10 Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection Malfunction <20/25/35/42 class> Operation stops due to overcurrent. Decision If the error repeats 16 times, the system is shut down. Conditions Reset condition: Continuous run for about 11 minutes without any other error <50 class>...
Page 105: Dc Fan Lock
SiBE041101 Troubleshooting 4.11 DC Fan Lock Remote Controller Display Method of An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Malfunction Detection Malfunction The fan does not start in 15 ~ 60 seconds (depending on the model) even when the fan motor is running.
Page 106: Input Overcurrent Detection
Troubleshooting SiBE041101 4.12 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 following current with the compressor running continues for 2.5 seconds. Cooling / Heating: Above 9.25 ~ 20 A (depending on the model) Decision Conditions...
Page 107: Four Way Valve Abnormality
SiBE041101 Troubleshooting 4.13 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 1 ~ 10 minutes (depending on the model) after operating...
Page 108 Troubleshooting SiBE041101 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.05 Four way valve coil Correct it. Refer to P.124 disconnected (loose)? Check No.06 Harness out of connector? Refer to P.125 Reconnect it.
Page 109: Discharge Pipe Temperature Control
SiBE041101 Troubleshooting 4.14 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 110 Troubleshooting SiBE041101 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Check No. 06 Refer to P.123 Replace the defective Check the thermistors. • Discharge pipe thermistor thermistor.
Page 111: High Pressure Control In Cooling
SiBE041101 Troubleshooting 4.15 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 65°C.
Page 112: Compressor System Sensor Abnormality
Troubleshooting SiBE041101 4.16 Compressor System Sensor Abnormality 4.16.1 20/25/35/42 Class 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 113 SiBE041101 Troubleshooting 4.16.2 50 Class Remote Controller Display Method of The system checks the supply voltage and the DC voltage before the compressor starts. The system checks the compressor current right after the compressor starts. Malfunction Detection Malfunction The supply voltage and the DC voltage is obviously low or high. Decision The compressor current does not run when the compressor starts.
Page 114: Position Sensor Abnormality
Troubleshooting SiBE041101 4.17 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 If the error repeats, the system is shut down. Reset condition: Continuous run for about 11 minutes (50 class: 5 minutes) without any Decision other error...
Page 115 SiBE041101 Troubleshooting Troubleshooting 20/25/35/42 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.14 Refer to P.129 Turn off the power. Check No.29 Check the power supply voltage. Refer to P.132 Voltage as rated? Correct the power supply.
Page 116 Troubleshooting SiBE041101 Troubleshooting 50 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.14 Refer to P.129 Turn off the power. Check the power supply voltage. Voltage as rated? Correct the power supply.
Page 117: Dc Voltage / Current Sensor Abnormality (20/25/35/42 Class)
SiBE041101 Troubleshooting 4.18 DC Voltage / Current Sensor Abnormality (20/25/35/42 Class) Remote Controller Display Method of DC voltage or DC current sensor abnormality is identified based on the compressor running frequency and the input current. Malfunction Detection Malfunction The compressor running frequency is above 52 Hz. If the error repeats 4 times, the system is shut down.
Page 118: Ct Or Related Abnormality (50 Class)
Troubleshooting SiBE041101 4.19 CT or Related Abnormality (50 Class) Remote Controller Display Method of A CT or related error is detected by checking the compressor running frequency and CT- Malfunction detected input current. Detection Malfunction The compressor running frequency is more than 55 Hz, and the CT input current is below 0.5 A.
Page 119 SiBE041101 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.12 Turn off the power and turn it on Refer to P.128 again. Check No.14 Start operation. Refer to P.129 ∗...
Page 120: Thermistor Or Related Abnormality (Outdoor Unit)
Troubleshooting SiBE041101 4.20 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 (42 class: 4.98 V) or below 0.04 V (42 class:...
Page 121 SiBE041101 Troubleshooting 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.06 Turn on the power again. Refer to P.125 Error displayed Reconnect the connectors...
Page 122: Electrical Box Temperature Rise
Troubleshooting SiBE041101 4.21 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 123 SiBE041101 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.07 WARNING Turn off the power and turn it on again. To cool the electrical components, Refer to P.126 the outdoor fan starts when the radiation fin temperature rises above C ˚C and stops when it...
Page 124: Radiation Fin Temperature Rise
Troubleshooting SiBE041101 4.22 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 125 SiBE041101 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.07 Turn off the power and turn it on Refer to P.126 again to start the system. Check No.09 Refer to P.127 Error displayed again?
Page 126: Output Overcurrent Detection
Troubleshooting SiBE041101 4.23 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 127 SiBE041101 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.07 ∗ An output overcurrent signal may result from wrong internal wiring. If the wires have been disconnected and reconnected and the system is interrupted by an output overcurrent, take the Refer to P.126 following procedure.
Page 128: Refrigerant Shortage
Troubleshooting SiBE041101 4.24 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 smaller than the normal value. Detection Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of...
Page 129 SiBE041101 Troubleshooting Refrigerant shortage detection III : (20/25/35 class only) When the difference of the temperature is smaller than K °C, it is regarded as refrigerant shortage. K (°C) room thermistor temperature – indoor heat exchanger temperature Cooling outdoor heat exchanger temperature – outdoor temperature indoor heat exchanger temperature –...
Page 130 Troubleshooting SiBE041101 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Refer to P.123 Any thermistor Replace them in position. disconnected? ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗...
Page 131: Low-Voltage Detection Or Over-Voltage Detection
SiBE041101 Troubleshooting 4.25 Low-voltage Detection or Over-voltage Detection Remote Controller Display Method of Low-voltage detection: Malfunction An abnormal voltage drop is detected by the DC voltage detection circuit. Detection Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit. Malfunction Low-voltage detection: The voltage detected by the DC voltage detection circuit is below 150 ~ 180 V (depending on...
Page 132 Troubleshooting SiBE041101 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the supply voltage. Supply voltage as Correct the power supply. specified? Rotate the fan by hand. Does the fan rotate Replace the fan motor or smoothly? the outdoor unit PCB.
Page 133: Signal Transmission Error On Outdoor Unit Pcb (50 Class Only)
SiBE041101 Troubleshooting 4.26 Signal Transmission Error on Outdoor Unit PCB (50 Class Only) Remote Controller Display Method of Communication error between microcomputer mounted on the main microcomputer and PM1. Malfunction Detection Malfunction The abnormality is determined when the data sent from the PM1 can not be received for 9 Decision seconds.
Page 134: Check
Check SiBE041101 5. Check Fan Motor Connector Output Check Check No.01 1. Check the connection of connector. 2. Check the motor power supply voltage output (pins 4 - 7). 3. Check the motor control voltage (pins 4 - 3). 4. Check the rotation command voltage (pins 4 - 2). 5.
Page 135: Four Way Valve Performance Check
SiBE041101 Check Four Way Valve Performance Check Check No.05 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 136: Thermistor Resistance Check
Check SiBE041101 Thermistor Resistance Check Check No.06 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the table and the graph below. Thermistor temperature (°C) Resistance (kΩ) –20...
Page 137: Installation Condition Check
SiBE041101 Check Installation Condition Check Check No.07 Installation condition check Check the allowable Abnormal dimensions of the air Change the installation suction and location or direction. discharge area. Normal Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty?
Page 138: Outdoor Fan System Check
Check SiBE041101 Outdoor Fan System Check Check No.09 DC motor Check the outdoor fan system. Fan motor lead wire connector Outdoor fan running? Reconnect the connector. disconnected? Go to Check No. 15. Outdoor fan system is functioning. (R7159) Power Supply Waveforms Check Check No.10 Measure the power supply waveform between No.
Page 139: Capacitor Voltage Check
SiBE041101 Check 5.10 Capacitor Voltage Check Check No.12 Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question. Be careful never to touch any live parts. Multimeter (DC voltage range) (R13538)
Page 140: Inverter Checker" Check
Check SiBE041101 5.12 “Inverter Checker” Check Check No.14 Characteristics If 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 141 SiBE041101 Check 42 class: Activate power transistor test operation from indoor unit. 1) Turn the power on. 2) Select FAN operation with the [MODE] button on the remote controller. 3) Press the 3 buttons (TEMP , TEMP , MODE) simultaneously. →...
Page 142: Rotation Pulse Check On The Outdoor Unit Pcb
Check SiBE041101 5.13 Rotation Pulse Check on the Outdoor Unit PCB Check No.15 20/25/35 class 1. Check that the voltage between the pins 10 - 11 is 15 VDC. 2. Check if the Hall IC generates the rotation pulse (0 ~ 15 VDC) 4 times between the pins 10 - 12, 10 - 13, when the fan motor is manually rotated once.
Page 143: Main Circuit Short Check
SiBE041101 Check 5.14 Main Circuit Short Check Check No.29 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 144: Part 7 Removal Procedure
SiBE041101 Part 7 Removal Procedure 1. Indoor Unit...................134 1.1 Removal of Air Filters ................134 1.2 Removal of Front Panel................136 1.3 Removal of Front Grille ................138 1.4 Removal of Horizontal Blades / Vertical Blades ........141 1.5 Removal of Electrical Box ..............144 1.6 Removal of PCBs .................147 1.7 Removal of Indoor Heat Exchanger .............152 1.8 Removal of Swing Motors ..............155...
Page 145: Indoor Unit
SiBE041101 Indoor Unit 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 146 Indoor Unit SiBE041101 Step Procedure Points 3. Remove the Titanium apatite photocatalytic air- purifying filters. The Titanium apatite The Titanium apatite Air filter photocatalytic air- photocatalytic air-purifying purifying filter ASSY is filter is not marked for attached to the back of difference between the right the air filter.
Page 147: Removal Of Front Panel
SiBE041101 Indoor Unit 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 Hold the both sides of Front panel the front panel, and open the panel over the position where it stops.
Page 148 Indoor Unit SiBE041101 Step Procedure Points When mounting the Caution on Mounting front panel, make sure When mounting the front Shaft that the shaft is fitted in panel, fit the right and left the guide before closing rotary shafts one by one into the panel.
Page 149: Removal Of Front Grille
SiBE041101 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 1. Remove the service cover. Remove the screw of Preparation Service cover the service cover.
Page 150 Indoor Unit SiBE041101 Step Procedure Points 2. Remove the front grille. Remove the 2 screws. (one each at the right and left) (R12267) The front grille has 3 Hooks hooks at the top. (R8076) Unfasten the left hook. Front grille (R7917) Unfasten the center hook.
Page 151 SiBE041101 Indoor Unit Step Procedure Points Unfasten the right hook. (R8078) Pull the upper part of Caution on Mounting the front grille out and When mounting the front lift the lower part up, grille, make sure that the 3 and then remove the hooks are fastened as they front grille.
Page 152: Removal Of Horizontal Blades / Vertical Blades
Indoor Unit SiBE041101 Removal of Horizontal Blades / 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. Remove the horizontal blade (large). Open the horizontal Caution on Mounting blade (large).
Page 153 SiBE041101 Indoor Unit Step Procedure Points 2. Remove the horizontal blade (small). Unfasten the center shaft while bending the horizontal blade (small) Horizontal blade (small) slightly. (R7925) Unfasten the left shaft. (R7926) Unfasten the key alignment shaft at the right side. (R7927) 3.
Page 154 Indoor Unit SiBE041101 Step Procedure Points 4. Remove the vertical blade ASSYs. Detach the pivot from Pivot Vertical blade ASSY the interlock shaft for vertical blades with a flat screwdriver. Interlock shaft (R12270) Remove the interlock rod. Interlock rod (R10302) Unfasten the hooks at the upper 3 positions by pressing them with a...
Page 155: Removal Of Electrical Box
SiBE041101 Indoor Unit Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points The figure shows the Preparation Electrical box connections of wire Remove the front grille harnesses.
Page 156 Indoor Unit SiBE041101 Step Procedure Points Disconnect the connector for swing motors [S41]. [S41] (R7935) Release the harness for swing motors from the hook. (R7936) Pull out the indoor heat Be careful not to lose the Indoor heat exchanger thermistor exchanger thermistor.
Page 157 SiBE041101 Indoor Unit Step Procedure Points Remove the screw of the electrical box. (R3939) Unfasten the hook at the upper far side by pressing it from above and pulling the Hook electrical box toward yourself. (R8081) Lift up the electrical box There is a hook also at the and pull it out.
Page 158: Removal Of Pcbs
Indoor Unit SiBE041101 Removal of 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. The figure shows the Preparation appearance of the Remove the electrical box Shield plate electrical box.
Page 159 SiBE041101 Indoor Unit Step Procedure Points 3. Remove the signal Signal receiver unit receiver unit. Unfasten the 3 hooks. (R12277) Unfasten the book on the opposite side, and lift up the signal receiver unit. (R8262) Hook (R12278) Remove the signal receiver unit.
Page 160 Indoor Unit SiBE041101 Step Procedure Points 4. Remove the INTELLIGENT EYE sensor PCB. Unfasten the 3 hooks INTELLIGENT EYE and remove the sensor PCB INTELLIGENT EYE sensor PCB. (R8092) Disconnect the [S26] connector [S26] from the INTELLIGENT EYE sensor PCB. (R8093) 5.
Page 161 SiBE041101 Indoor Unit Step Procedure Points 6. Remove the display PCB. The display PCB is positioned on the rear side The figure shows the of the signal receiver unit. connection of wire harness for the display PCB. Display PCB (R8094) Unfasten the 4 hooks and remove the display PCB.
Page 162 Indoor Unit SiBE041101 Step Procedure Points Lift up the bottom of the When mounting the control control PCB and pull it PCB, make sure that it is out. fixed by upper 2 hooks. (R8098) The figures show the [S1]: DC fan motor names of the PCB [S21]: HA connector component parts.
Page 163: Removal Of Indoor Heat Exchanger
SiBE041101 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 piping. Remove the screws which fix the indoor heat exchanger to the installation plate.
Page 164 Indoor Unit SiBE041101 Step Procedure Points 2. Remove the indoor heat Preparation exchanger. Remove the indoor unit from the installation plate. Unfasten the hook of Piping the piping fixture at the fixture back of the indoor unit and pull out the pipe. (R10622) Widen the auxiliary pipe by about 10-20...
Page 165 SiBE041101 Indoor Unit Step Procedure Points After unfastening the When mounting the indoor lower hook, lift up the heat exchanger, make sure Indoor heat indoor heat exchanger that the right hooks are exchanger by its right side. fastened. Lower hook (R14192) Remove the indoor heat exchanger.
Page 166: Removal Of Swing Motors
Indoor Unit SiBE041101 Removal of Swing Motors 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 swing motor for vertical blade. Lift the indoor unit with a wooden base.
Page 167 SiBE041101 Indoor Unit Step Procedure Points Detach the pivot from Pivot Vertical blade ASSY the interlock shaft for vertical blades with a flat screwdriver. Interlock shaft (R12270) Remove the swing motor unit. Swing motor unit (R8126) Detach the interlock Interlock shaft shaft from the swing motor with a flat screwdriver.
Page 168 Indoor Unit SiBE041101 Step Procedure Points Remove the 2 screws. Screws (R10332) Remove the swing motor for vertical blade. (R10333) Disconnect the Connector : green connector. (R10334) Removal Procedure...
Page 169 SiBE041101 Indoor Unit Step Procedure Points 2. Remove the swing motor for horizontal blade. Caution When reassembling, do not Remove the screw and confuse the installing order remove the swing of the 2 motors and the motors for horizontal colors of the connectors. blades.
Page 170: Removal Of Fan Motor
Indoor Unit SiBE041101 Removal of 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 “Removal of Indoor Heat Exchanger”.
Page 171 SiBE041101 Indoor Unit Step Procedure Points Remove the 2 screws of the fan motor fixing plate. Fan motor fixing plate (R8116) Unfasten the hook of the fan motor fixing plate and remove the plate. (R8117) (R8118) 2. Remove the fan rotor. Dislocate the fan rotor by sliding it to the right.
Page 172 Indoor Unit SiBE041101 Step Procedure Points Loosen the lock screw When reassembling the fan and remove the fan rotor, provide as much as rotor. 5 mm of play between the Lock screw side face of the rotor and the bottom frame. Side face of bottom frame Side face of rotor...
Page 173: Outdoor Unit - Rk(X)S20/25/35J2V1B
SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B 2. Outdoor Unit - RK(X)S20/25/35J2V1B Note: Illustrations are for heat pump models as representative. Removal of Outer Panels / Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.
Page 174 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points Remove the 2 screws Top panel and lift the top panel. (R7190) Remove the drip proof Drip proof plate plate. (R7191) Remove the 4 screws and remove the discharge grille. Discharge grille (R7192) The discharge grille has 4 hooks.
Page 175 SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Step Procedure Points Remove the 8 screws of the front panel. (R11825) Front panel Unfasten the hooks. The front panel has 4 hooks. Pull and remove the front panel. Hooks (R11826) Removal Procedure...
Page 176 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points 3. Remove the fan motor. The screw has reverse winding. Remove the washer- Nut size: M6 fitted nut of the outdoor fan. 10 mm (R12236) Outdoor fan (R14205) Remove the outdoor When reassembling, align fan.
Page 177 SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Step Procedure Points Cut the clamp. (R11830) Disconnect the connector for the fan motor [S70]. (R11831) [S70] Release the fan motor Fan motor lead wire from the hook. lead wire (R11832) Removal Procedure...
Page 178 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points Remove the screw and remove the fan motor fixing frame. Fan motor fixing frame (R11833) (R12314) When reassembling, fit the lower hooks into the bottom frame. (R7206) Removal Procedure...
Page 179 SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Step Procedure Points Open the hooks and When reassembling, put the release the fan motor fan motor lead wire through lead wire. the back of the fan motor (so as not to be entangled with the outdoor fan). (R11835) Lead wire Outdoor fan...
Page 180 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points Remove the 4 screws Right side panel on the right side panel. (R12163) Remove the screw near the stop valves. (R11839) Unfasten the hook on When reassembling, make the rear side. sure to fit the hook. (R11842) Removal Procedure...
Page 181 SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Step Procedure Points Lift up the right side When reassembling, make panel and remove it. sure to fit the hook. Hook (R12272) Lift up the guard net Guard net and remove it. (R11841) Removal Procedure...
Page 182: Removal Of Electrical Box
Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the Preparation connector for the Remove the panels and overload protector disconnect the connector for [S40].
Page 183 SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Step Procedure Points Disconnect the relay connector for the compressor. (R11845) Disconnect the connector for the electronic expansion valve coil [S20]. [S20] (R11847) Cut the clamp. (R11850) Pull out the outdoor Be careful not to lose the clip heat exchanger for the thermistor.
Page 184 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points Release the discharge Be careful not to lose the clip pipe thermistor. for the thermistor. Clip (R12279) Discharge pipe thermistor (R11849) Lift and remove the Electrical Box electrical box. (R11852) Removal Procedure...
Page 185: Removal Of Pcbs
SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Removal of 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 main PCB. You can remove the main PCB when you disconnect Feature of the main the lead wires on the...
Page 186 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points Pull out the forced Be careful of a sharp operation button PCB. protrusion at the back of the Disconnect the forced operation button connector [S110] to PCB. remove the forced operation button PCB. Forced operation button PCB (R11856) Disconnect the relay...
Page 187 SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Step Procedure Points Release the harness. (R11859) Cut the clamps at the 2 locations. (R11860) Disconnect the connector for the filter PCB [S10]. [S10] (R11861) Removal Procedure...
Page 188 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points Disconnect the connectors for the [S100] magnetic relay [S50] and for the forced operation button PCB [S100]. [S50] (R11862) Disconnect the connector for the filter [HN3] PCB [HL3] [HN3]. [HL3] (R11863) Release the harnesses from the hook.
Page 189 SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Step Procedure Points Remove the 6 screws. (R11866) Unfasten the 4 hooks and remove the main PCB. (R11867) Refer to page 15 for detail. [S50] [S100] [S10] [HL3] [HN3]: filter PCB [S20]: electronic expansion valve coil [HN3] [S40]: overload protector [HL3]...
Page 190 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points 2. Remove the filter PCB. Release the harnesses from the hook. Filter PCB (R11869) Cut the clamp. (R11871) Release the harnesses from the hook. (R11872) Removal Procedure...
Page 191 SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Step Procedure Points Release the harnesses from the hooks. (R11873) Remove the screw. (R11874) Unfasten the 2 hooks. Filter PCB (R11876) Lift and pull out the filter PCB. (R11877) Removal Procedure...
Page 192 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points Feature of the filter Refer to page 15 for detail. (R11878) Removal Procedure...
Page 193: Removal Of Reactor / Partition Plate
SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Removal of Reactor / Partition Plate 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 reactor. Preparation Reactor Remove the outer panels Remove the screw and according to the “Removal of...
Page 194 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. (R12280) When reassembling, fit the lower hook into the bottom frame. (R11883) Removal Procedure...
Page 195: Removal Of Sound Blankets
SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B 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 Remove the sound Since the piping ports are blanket (top).
Page 196 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points Pull the sound blanket (inner) out. Sound blanket (inner) (R11887) Pull the sound blanket (bottom) out. Sound blanket (bottom) (R11888) Removal Procedure...
Page 197: Removal Of Four Way Valve
SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B 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 Pull out the electronic expansion valve coil. Electronic expansion valve coil...
Page 198 Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 Step Procedure Points Remove the screw and Four way valve coil remove the four way Warning valve coil. Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.
Page 199 SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Step Procedure Points Note: Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit. When withdrawing the pipes, be careful not to pinch them firmly with pliers. The pipes may get deformed.
Page 200: Removal Of Compressor
Outdoor Unit - RK(X)S20/25/35J2V1B SiBE041101 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 2 nuts of the compressor. Warning Be careful not to get yourself burnt with pipes and other parts that are heated by the gas brazing machine.
Page 201 SiBE041101 Outdoor Unit - RK(X)S20/25/35J2V1B Step Procedure Points Heat up the brazed part Note: of the suction side and Do not use a metal saw for disconnect. cutting pipes by all means because the sawdust comes into the circuit. When withdrawing the pipes, be careful not to pinch them firmly with pliers.
Page 202: Outdoor Unit - Rk(X)S42J2V1B
Outdoor Unit - RK(X)S42J2V1B SiBE041101 3. Outdoor Unit - RK(X)S42J2V1B Note: Illustrations are for heat pump models as representative. Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step...
Page 203 SiBE041101 Outdoor Unit - RK(X)S42J2V1B Step Procedure Points Remove the 4 screws When reassembling, make and remove the sure to fit the 4 hooks. discharge grille. (R9364) Remove the screw and The stop valve cover is remove the stop valve united with the shield plate.
Page 204: Removal Of Electrical Box
Outdoor Unit - RK(X)S42J2V1B SiBE041101 Removal of Electrical Box 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 When reassembling, fasten connecting wires. the wires with screws on the terminal board.
Page 205 SiBE041101 Outdoor Unit - RK(X)S42J2V1B Step Procedure Points Remove the 7 screws, and remove the right Right side panel side panel. (R12217) Remove the screw of the terminal board. Terminal board (R12218) Disconnect the For removal procedure of the connector for the fan fan motor lead wire, refer to [S70] motor [S70].
Page 206 Outdoor Unit - RK(X)S42J2V1B SiBE041101 Step Procedure Points Disconnect the connector for the [S40] overload protector [S40]. (R0255) Disconnect the connector for the [S20] electronic expansion valve coil [S20]. (R0256) Disconnect the connector for the four [S80] way valve coil [S80]. (R0257) Disconnect the [S90]...
Page 207 SiBE041101 Outdoor Unit - RK(X)S42J2V1B Step Procedure Points Disconnect the relay connector for the compressor. (R0259) Disconnect the 2 connectors for the reactor. (R0260) Release the discharge Be careful not to lose the clip pipe thermistor. for the thermistor. Clip (R12279) Discharge pipe thermistor...
Page 208 Outdoor Unit - RK(X)S42J2V1B SiBE041101 Step Procedure Points Remove the screw in front of the electrical box. (R0263) Lift and remove the electrical box. (R0264) Removal Procedure...
Page 209: Removal Of Pcb
SiBE041101 Outdoor Unit - RK(X)S42J2V1B Removal of PCB 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 screw and Preparation remove the electrical Remove the panels Electrical box cover box cover.
Page 210 Outdoor Unit - RK(X)S42J2V1B SiBE041101 Step Procedure Points Release the earth wire from the hook. (R8159) Remove the 2 screws and detach the 1 clip to remove the radiation Clip shield plate. Radiation shield plate (R12198) (R8161) Cut off the 5 clamps and disconnect the wire harnesses.
Page 211 SiBE041101 Outdoor Unit - RK(X)S42J2V1B Step Procedure Points Remove the 8 screws in total to remove the PCB. (R8163) (R8164) Lift up the back side When reassembling, make slightly and unfasten sure that the hooks of the the hooks of the front. electrical box are placed on the PCB.
Page 212 Outdoor Unit - RK(X)S42J2V1B SiBE041101 Step Procedure Points Remove the PCB. (R8168) Detach the terminals Refer to page 17 for detail. from the terminal board. [S20] [S70] [S40] [S80] [S90] (R8169) [S20]: electronic expansion valve coil [S40]: overload protector [S70]: fan motor [S80]: four way valve coil [S90]: thermistors Removal Procedure...
Page 213 SiBE041101 Outdoor Unit - RK(X)S42J2V1B Step Procedure Points Remove the screw of the radiation fin. Radiation fin (R12214) (R8171) Removal Procedure...
Page 214: Removal Of Sound Blankets
Outdoor Unit - RK(X)S42J2V1B SiBE041101 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. Partition plate Remove the 2 screws. When reassembling, fit the lower hook into the bottom frame.
Page 215 SiBE041101 Outdoor Unit - RK(X)S42J2V1B Step Procedure Points 2. Remove of the sound Since the piping ports are blanket. torn easily, remove the Untie the string, open blanket carefully. the sound blanket (outer) and pull it out. (R12199) Sound blanket (outer) (R8180) Remove the sound Sound blanket (top upper)
Page 216: Removal Of Outdoor Fan / Fan Motor
Outdoor Unit - RK(X)S42J2V1B SiBE041101 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. The screw has reverse winding.
Page 217 SiBE041101 Outdoor Unit - RK(X)S42J2V1B Step Procedure Points The figure shows the arrangement of the fan motor lead wire. (R8185) Remove the 1 screw of the fan motor fixing frame. Fan motor fixing frame (R12202) (R8187) Remove the fan motor fixing frame.
Page 218 Outdoor Unit - RK(X)S42J2V1B SiBE041101 Step Procedure Points Turn the fan motor fixing frame backward and open the 2 hooks of the fan motor lead wire. (R8189) Release the fan motor When reassembling, put the lead wire. fan motor lead wire through the back of the fan motor (so as not to be entangled with the outdoor fan).
Page 219: Removal Of Thermistors
SiBE041101 Outdoor Unit - RK(X)S42J2V1B Removal of Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Release the discharge Be careful not to lose the clip pipe thermistor.
Page 220: Removal Of Four Way Valve / Electronic Expansion Valve
Outdoor Unit - RK(X)S42J2V1B SiBE041101 Removal of Four Way Valve / Electronic Expansion 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. Preparation Remove the sound blankets.
Page 221 SiBE041101 Outdoor Unit - RK(X)S42J2V1B 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 other replacement when parts that are heated by the heating up the brazed gas brazing machine.
Page 222 Outdoor Unit - RK(X)S42J2V1B SiBE041101 Step Procedure Points Note: Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit. When withdrawing the pipes, be careful not to pinch them firmly with pliers. The pipes may get deformed.
Page 223: Removal Of Compressor
SiBE041101 Outdoor Unit - RK(X)S42J2V1B 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 terminal Terminal cover cover. (R8195) Disconnect the lead Red (U) wires of the compressor.
Page 224 Outdoor Unit - RK(X)S42J2V1B SiBE041101 Step Procedure Points Remove the protection Protection bushing bushing. (R8199) Remove the 2 nuts of the compressor. Warning (R0265) Be careful not to get yourself Before working, make burnt with the pipes and other sure that the refrigerant parts that are heated by the gas is empty in the circuit.
Page 225 SiBE041101 Outdoor Unit - RK(X)S42J2V1B Step Procedure Points Lift the compressor up Cautions for restoration to remove. 1. Restore the piping by non- oxidation brazing. 2. It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat.
Page 226: Outdoor Unit - Rk(X)S50J2V1B
Outdoor Unit - RK(X)S50J2V1B SiBE041101 4. Outdoor Unit - RK(X)S50J2V1B Note: Illustrations are for heat pump models as representative. 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...
Page 227 SiBE041101 Outdoor Unit - RK(X)S50J2V1B Step Procedure Points The discharge grille has 4 hooks. Remove the 6 screws of the front panel. Front panel (R12284) Push the front panel and lift the shield plate Shield plate to unfasten the hooks. (1) Push the front panel.
Page 228 Outdoor Unit - RK(X)S50J2V1B SiBE041101 Step Procedure Points Unfasten the left side Lift the front panel while hooks, and then the pushing the left side panel right side hook. inwards. Remove the front panel. Lift the front panel and unfasten the right side hook. When reassembling, fit the right side of the front panel first.
Page 229 SiBE041101 Outdoor Unit - RK(X)S50J2V1B Step Procedure Points 2. Remove the stop valve cover. Remove the screw of the stop valve cover. Stop valve cover (R5252) Pull down the stop valve cover to unfasten the hooks and remove The stop valve cover has 6 hooks.
Page 230: Removal Of Outdoor Fan / Fan Motor
Outdoor Unit - RK(X)S50J2V1B SiBE041101 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 electrical box Preparation cover.
Page 231 SiBE041101 Outdoor Unit - RK(X)S50J2V1B Step Procedure Points (R5258) 2. Remove the fan motor. Disconnect the connector for the fan [S70] motor [S70]. (R5259) Release the fan motor lead wire from the 7 hooks. Fan motor lead wire (R5260) Removal Procedure...
Page 232 Outdoor Unit - RK(X)S50J2V1B SiBE041101 Step Procedure Points Remove the washer- The screw has reverse fitted nut of the outdoor winding. fan. Nut size: M6 10 mm (R12236) Outdoor fan (R5262) When reassembling, align mark of the outdoor fan with D-cut section of the motor shaft.
Page 233 SiBE041101 Outdoor Unit - RK(X)S50J2V1B Step Procedure Points Release the fan motor When reassembling, put the lead wire from the 2 fan motor lead wire through hooks and pull the fan the back of the fan motor (so motor out. as not to be entangled with the outdoor fan).
Page 234: Removal Of Electrical Box
Outdoor Unit - RK(X)S50J2V1B SiBE041101 Removal of Electrical Box 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 Preparation of the shield plate. Remove the top panel and the front panel according to the “Removal of Outer...
Page 235 SiBE041101 Outdoor Unit - RK(X)S50J2V1B Step Procedure Points Disconnect the 2 earth wires. Earth wires (R5269) Remove the 3 screws of the right side panel. Right side panel (R5270) Remove the screw of the electrical box. Removal Procedure...
Page 236 Outdoor Unit - RK(X)S50J2V1B SiBE041101 Step Procedure Points Unfasten the hooks and When reassembling, insert remove the right side the 2 hooks of the lower part panel. and the 1 hook of the upper Hook back. (R5272) Hooks (R5273) Disconnect the connectors of the front [S40] [S20] [S80]...
Page 237 SiBE041101 Outdoor Unit - RK(X)S50J2V1B Step Procedure Points Release the clamp of the compressor relay harness with pliers. Compressor relay harness (R5277) Detach the clamp and release the thermistor Clamp Hook lead wires from the hook. Thermistor lead wire (R5278) Remove the screw.
Page 238 Outdoor Unit - RK(X)S50J2V1B SiBE041101 Step Procedure Points Release the harness of the outdoor temperature thermistor from the hook. (R9403) Lift and remove the electrical box. Electrical box (R5279) Removal Procedure...
Page 239: Removal Of Pcb
SiBE041101 Outdoor Unit - RK(X)S50J2V1B Removal of PCB Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the Preparation [S102] connectors from the [S52] Remove the electrical box service monitor PCB according to the “Removal of [S52] [S102].
Page 240 Outdoor Unit - RK(X)S50J2V1B SiBE041101 Step Procedure Points Unfasten the hook on the right. Open the terminal board. Disconnect the 1: Black harnesses. 2: White 3: Red L1: Black L2: Brown N1: White N2: Blue (R5285) Disconnect the 2 connectors for the reactor [HR1] [HR2].
Page 241 SiBE041101 Outdoor Unit - RK(X)S50J2V1B Step Procedure Points Remove the 3 screws of the main PCB. Main PCB (R5287) Unfasten the 4 hooks. Hooks (R5288) Lift up and remove the Refer to page 19 for detail. main PCB. Main PCB (R5289) Removal Procedure...
Page 242: Removal Of Sound Blankets / Thermistors
Outdoor Unit - RK(X)S50J2V1B SiBE041101 Removal of Sound Blankets / Thermistors 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 sound blanket (back). Sound blanket (back) Remove the sound Since the piping ports are...
Page 243 SiBE041101 Outdoor Unit - RK(X)S50J2V1B Step Procedure Points Remove the sound Sound blanket blanket (top lower). (top lower) (R11398) Remove the sound blanket (inner). Sound blanket (inner) (R5296) Release the discharge Be careful not to lose the clip pipe thermistor. for the thermistor.
Page 244: Removal Of Four Way Valve
Outdoor Unit - RK(X)S50J2V1B SiBE041101 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 Remove the screw and remove the four way Warning valve coil.
Page 245: Removal Of Electronic Expansion Valve
SiBE041101 Outdoor Unit - RK(X)S50J2V1B Removal of Electronic Expansion Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Pull out the electronic expansion valve coil. Electronic expansion valve coil (R2737) Remove the sheets of...
Page 246: Removal Of Compressor
Outdoor Unit - RK(X)S50J2V1B SiBE041101 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 terminal cover. Terminal cover (R5302) Disconnect the lead wires of the compressor.
Page 247 SiBE041101 Outdoor Unit - RK(X)S50J2V1B Step Procedure Points Release the clamp with pliers to detach the compressor lead wires. Remove the putty. 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 other replacement when...
Page 248 Outdoor Unit - RK(X)S50J2V1B SiBE041101 Step Procedure Points Remove the 2 nuts of Cautions for restoration the compressor. 1. Restore the piping by non- oxidation brazing. 2. It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat.
Page 249: Part 8 Trial Operation And Field Settings
SiBE041101 Part 8 Trial Operation and Field Settings 1. Pump Down Operation................239 2. Forced Cooling Operation ..............240 3. Trial Operation ..................242 4. Field Settings ..................243 4.1 Model Type Setting ................243 4.2 When 2 Units are Installed in 1 Room..........243 4.3 Standby Electricity Saving..............244 4.4 Facility Setting Jumper and Switch (cooling at low outdoor temperature)............245 4.5 Jumper and Switch Settings..............246...
Page 250: Pump Down Operation
Pump Down Operation SiBE041101 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 251: Forced Cooling Operation
SiBE041101 Forced Cooling Operation 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 The forced cooling operation is allowed when both the following conditions are met.
Page 252 Forced Cooling Operation SiBE041101 Outdoor Unit (50 class) S102 LED-A Forced operation ON/OFF switch (R14176) Note: 42 class models have no forced operation ON/OFF button on the outdoor unit PCB. Carry out forced cooling operation from indoor unit. Trial Operation and Field Settings...
Page 253: Trial Operation
SiBE041101 Trial Operation 3. Trial Operation Outline 1. Measure the 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 louver movement, are working properly.
Page 254: Field Settings
Field Settings SiBE041101 4. Field Settings Model Type Setting ARC452A3 This remote controller is common to the heat pump model and cooling only model. Use the DIP switch on the remote controller to set the heat pump model or cooling only model. Make the setting as shown in the illustration.
Page 255: Standby Electricity Saving
SiBE041101 Field Settings Wireless Remote (1) Remove the cover and take it off. Controller (2) Cut the address setting jumper. Jumper ADDRESS EXIST (R14190) Standby Electricity Saving Outline 20-42 Class Only This function turns power supply OFF to the outdoor unit and sets the indoor unit into energy- saving mode, thus reducing the power consumption of the air conditioner.
Page 256: Facility Setting Jumper And Switch (Cooling At Low Outdoor Temperature)
Field Settings SiBE041101 Facility Setting Jumper and Switch (cooling at low outdoor temperature) Outline For Cooling Only Model This function is limited only for facilities (the target of air conditioning is equipment (such as computer)). Never use it in a residence or office (the space where there is a human). Detail You can expand the operation range to –15°C by cutting jumper or turning on switch on the outdoor unit PCB.
Page 257: Jumper And Switch Settings
SiBE041101 Field Settings RKS50J2V1B S102 LED-A Turn on the switch SW4-B. (R12186) Caution 1. If the outdoor unit is installed where the outdoor heat exchanger of the unit is exposed to direct wind, provide a windbreak wall. 2. Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off when using facility settings.
Page 258: Application Of Silicon Grease To A Power Transistor And A Diode Bridge
Application of Silicon Grease to a Power Transistor and a Diode Bridge SiBE041101 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 (*1) is certainly applied to the heat radiation part (the contact point to the radiation fin) of the power transistor and diode bridge.
Page 259: Part 9 Appendix
SiBE041101 Part 9 Appendix 1. Piping Diagrams..................249 1.1 Indoor Unit....................249 1.2 Outdoor Unit ..................250 2. Wiring Diagrams..................254 2.1 Indoor Unit....................254 2.2 Outdoor Unit ..................254 Appendix...
Page 260: Piping Diagrams
Piping Diagrams SiBE041101 1. Piping Diagrams Indoor Unit FTXS20/25/35/42J2V1B FTXS50J2V1B INDOOR UNIT INDOOR UNIT 6.4CuT 6.4CuT HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR CROSS FLOW FAN CROSS FLOW FAN ON HEAT EXCH. ON HEAT EXCH. FIELD PIPING FIELD PIPING 6.4CuT 6.4CuT FAN MOTOR FAN MOTOR FIELD PIPING...
Page 261: Outdoor Unit
SiBE041101 Piping Diagrams Outdoor Unit 1.2.1 Cooling Only RKS20J2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.0CuT 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 7.0CuT 6.4CuT 6.4CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY VALVE FIELD PIPING NORMALLY:OFF...
Page 262 Piping Diagrams SiBE041101 RKS42J2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.9CuT 7.9CuT HEAT EXCHANGER THERMISTOR MOTOR OPERATED VALVE 4.8CuT 6.4CuT 6.4CuT 4.8CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY VALVE FIELD PIPING NORMALLY:OFF (6.4CuT) LIQUID STOP...
Page 263 SiBE041101 Piping Diagrams 1.2.2 Heat Pump RXS20J2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.0CuT 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 7.0CuT 6.4CuT 6.4CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY VALVE FIELD PIPING ON:HEATING (6.4CuT)
Page 264 Piping Diagrams SiBE041101 RXS42J2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.9CuT 7.9CuT HEAT EXCHANGER THERMISTOR MOTOR OPERATED VALVE 4.8CuT 6.4CuT 6.4CuT 4.8CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY VALVE FIELD PIPING ON:HEATING (6.4CuT) LIQUID STOP...
Page 265: Wiring Diagrams
SiBE041101 Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTXS20/25/35/42/50J2V1B PCB3 PCB1 LED1 3.15A OUTDOOR C102 LED2 MR10 FIELD WIRING. LED3 C101 TRANSMISSION CIRCUIT CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY t˚ IS TURNED OFF AND THEN BACK ON AGAIN. : BUZZER RTH1 C101, C102 : CAPACITOR...
Page 266 Wiring Diagrams SiBE041101 RKS42J2V1B indoor PCB1 MRM20 IPM1 MRM10 3.15A 3.15A MRCW MR30 POWER SUPPLY t˚ t˚ t˚ (OUTDOOR) (DISCHARGE) X11A (CONDENSER) outdoor FIELD WIRING C74, C75, C94 : FAN MOTOR V1, V3, V4 : VARISTOR : CAPACITOR MRCW, MRM10, : TERMINAL STRIP DB1, DB2, DB3 : DIODE BRIDGE MRM20, MR30...
Page 267 SiBE041101 Wiring Diagrams RKS50J2V1B X12A MRM20 3.15A POWER SUPPLY MRM10 6(P) + + + 7(N) X11A TO INDOOR UNIT 3.15A PCB1 SHEET METAL S101 indoor FIELD WIRING t° t° t° 1 S102 PCB2 (OUTDOOR)(DISCHARGE) LED A (CONDENSER) outdoor Z1C~Z5C : FERRITE CORE : COMPRESSOR MOTOR X1M, X2M : TERMINAL STRIP...
Page 268 Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the Warning world. Daikin Industries, Ltd. does not have control over which products are exported to and used in a particular country. Prior to purchase, please therefore 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.

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