Page 1 SiBE04-808_B Service Manual Inverter Pair Wall Mounted Type G-Series [Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump...
Page 2 SiBE04-808_B Inverter Pair Wall Mounted Type G-Series Cooling Only Indoor Units FTXS20G2V1B FTXS25G2V1B FTXS35G2V1B FTXS42G2V1B FTXS50G2V1B Outdoor Units RKS20G2V1B RKS20G2V1B9 RKS25G2V1B RKS25G2V1B9 RKS35G2V1B RKS35G2V1B9 RKS42G2V1B RKS50G2V1B Heat Pump Indoor Units FTXS20G2V1B ATXS20G2V1B FTXS25G2V1B ATXS25G2V1B FTXS35G2V1B ATXS35G2V1B FTXS42G2V1B ATXS42G2V1B FTXS50G2V1B ATXS50G2V1B...
Page 3: Table Of Contents
SiBE04-808_B 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 ..............5 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................9 Part 3 Printed Circuit Board Connector Wiring Diagram ...
Page 4 SiBE04-808_B Part 5 Operation Manual ............. 61 1. System Configuration................62 2. FTXS20/25/35/42/50G2V1B ..............63 2.1 Remote Controller ..................63 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........64 2.3 Adjusting the Airflow Direction..............66 2.4 COMFORT AIRFLOW and INTELLIGENT EYE Operation....68 2.5 POWERFUL Operation ................71 2.6 OUTDOOR UNIT QUIET Operation............72 2.7 ECONO Operation .................73...
Page 5 SiBE04-808_B 4.20 Thermistor or Related Abnormality (Outdoor Unit).......132 4.21 Electrical Box Temperature Rise............134 4.22 Radiation Fin Temperature Rise ............136 4.23 Output Overcurrent Detection ..............138 4.24 Refrigerant Shortage ................140 4.25 Low-voltage Detection or Over-voltage Detection........143 4.26 Signal Transmission Error on Outdoor Unit PCB (50 Class Only) ..145 5.
Page 6 SiBE04-808_B 5.4 Removal of PCB...................277 5.5 Removal of Sound Blanket / Thermistors..........280 5.6 Removal of Four Way Valve..............282 5.7 Removal of Electronic Expansion Valve..........283 5.8 Removal of Compressor...............284 Part 8 Trial Operation and Field Settings......... 287 1. Pump Down Operation................288 2.
Page 7: Introduction
SiBE04-808_B 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 SiBE04-808_B 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 SiBE04-808_B 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 SiBE04-808_B 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
SiBE04-808_B 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
SiBE04-808_B Part 1 List of Functions 1. Functions....................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................3 List of Functions...
Page 13: Functions
SiBE04-808_B Functions 1. Functions Cooling Only Category Functions Category Functions Basic Inverter Health & Air-Purifying Filter — — Function (with Inverter Power Control) Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — ★ ★ Operation Limit for Heating (°CWB) —...
Page 14: Heat Pump
Functions SiBE04-808_B Heat Pump Category Functions Category Functions Basic Inverter Health & Air-Purifying Filter — — Function (with Inverter Power Control) Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — Air-Purifying Filter with – – Operation Limit for Heating (°CWB) —...
Page 15 SiBE04-808_B Functions Category Functions Category Functions Basic Inverter Health & Air-Purifying Filter — — Function (with Inverter Power Control) Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — Air-Purifying Filter with – – Operation Limit for Heating (°CWB) —...
Page 16: Part 2 Specifications
SiBE04-808_B Part 2 Specifications 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................9 Specifications...
Page 17: Specifications
SiBE04-808_B Specifications 1. Specifications Cooling Only 50 Hz, 220 - 230 - 240 V Indoor Units FTXS20G2V1B FTXS25G2V1B FTXS35G2V1B Models Outdoor Units RKS20G2V1B RKS25G2V1B RKS35G2V1B 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 18 Specifications SiBE04-808_B 50 Hz, 220 - 230 - 240 V Indoor Units FTXS20G2V1B FTXS25G2V1B FTXS35G2V1B Models Outdoor Units RKS20G2V1B9 RKS25G2V1B9 RKS35G2V1B9 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 19 SiBE04-808_B Specifications 50 Hz, 220 - 230 - 240 V Indoor Units FTXS42G2V1B FTXS50G2V1B Models Outdoor Units RKS42G2V1B RKS50G2V1B 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 3,610 (1,460 ~ 4,300) 4,300 (1,460 ~ 4,560)
Page 20: Heat Pump
Specifications SiBE04-808_B Heat Pump 50 Hz, 220 - 230 - 240 V Indoor Units FTXS20G2V1B FTXS25G2V1B Models RXS20G2V1B RXS25G2V1B Outdoor Units Cooling Heating Cooling Heating 2.0 (1.3 ~ 2.8) 2.7 (1.3 ~ 4.3) 2.5 (1.3 ~ 3.2) 3.4 (1.3 ~ 4.7) Capacity Btu/h 6,800 (4,400 ~ 9,600)
Page 21 SiBE04-808_B Specifications 50 Hz, 220 - 230 - 240 V Indoor Units FTXS35G2V1B FTXS20G2V1B Models RXS35G2V1B RXS20G2V1B9 Outdoor Units Cooling Heating Cooling Heating 3.5 (1.4 ~ 4.0) 4.0 (1.4 ~ 5.2) 2.0 (1.3 ~ 2.8) 2.7 (1.3 ~ 4.3) Capacity Btu/h 11,900 (4,800 ~ 13,600) 13,600 (4,800 ~ 17,700)
Page 22 Specifications SiBE04-808_B 50 Hz, 220 - 230 - 240 V Indoor Units FTXS25G2V1B FTXS35G2V1B Models RXS25G2V1B9 RXS35G2V1B9 Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.2) 3.4 (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 23 SiBE04-808_B Specifications 50 Hz, 220 - 230 - 240 V Indoor Units FTXS42G2V1B FTXS50G2V1B Model RXS42G2V1B RXS50G2V1B Outdoor Units 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 24 Specifications SiBE04-808_B 50 Hz, 220 - 230 - 240 V Indoor Units ATXS20G2V1B ATXS25G2V1B Models ARXS20G2V1B ARXS25G2V1B Outdoor Units Cooling Heating Cooling Heating 2.0 (1.3 ~ 2.8) 2.7 (1.3 ~ 4.3) 2.5 (1.3 ~ 3.2) 3.4 (1.3 ~ 4.7) Capacity Btu/h 6,800 (4,400 ~ 9,600) 9,200 (4,400 ~ 14,700)
Page 25 SiBE04-808_B Specifications 50 Hz, 220 - 230 - 240 V Indoor Units ATXS35G2V1B ATXS20G2V1B Models ARXS35G2V1B ARXS20G3V1B Outdoor Units Cooling Heating Cooling Heating 3.5 (1.4 ~ 4.0) 4.0 (1.4 ~ 5.2) 2.0 (1.3 ~ 2.8) 2.7 (1.3 ~ 4.3) Capacity Btu/h 11,900 (4,800 ~ 13,600) 13,600 (4,800 ~ 17,700)
Page 26 Specifications SiBE04-808_B 50 Hz, 220 - 230 - 240 V Indoor Units ATXS25G2V1B ATXS35G2V1B Models ARXS25G3V1B ARXS35G3V1B Outdoor Units Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.2) 3.4 (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 27 SiBE04-808_B Specifications 50 Hz, 220 - 230 - 240 V Indoor Units ATXS42G2V1B ATXS50G2V1B Model ARXS42G2V1B ARXS50G2V1B Outdoor Units 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 28: Part 3 Printed Circuit Board Connector Wiring Diagram
SiBE04-808_B Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........18 1.1 Indoor Unit....................18 1.2 Outdoor Unit ...................21 Printed Circuit Board Connector Wiring Diagram...
Page 29: Printed Circuit Board Connector Wiring Diagram
SiBE04-808_B Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram 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 Connector for indoor heat exchanger thermistor...
Page 30 Printed Circuit Board Connector Wiring Diagram SiBE04-808_B PCB Detail PCB (1): Control PCB LED A 2P206687-1 Printed Circuit Board Connector Wiring Diagram...
Page 31 SiBE04-808_B Printed Circuit Board Connector Wiring Diagram PCB (2): Signal Receiver PCB PCB (3): Display PCB RTH1 LED3 LED2 LED1 3P210728-1 3P210728-1 PCB (4): INTELLIGENT EYE Sensor PCB 3EB86013-1 Printed Circuit Board Connector Wiring Diagram...
Page 32: Outdoor Unit
Printed Circuit Board Connector Wiring Diagram SiBE04-808_B Outdoor Unit 1.2.1 RK(X)S20-35G2V1B, ARXS20-35G2V1B Connectors and PCB (1): Filter PCB Other Parts 1) S11 Connector for main PCB 2) HL1, HN1, S Connector for terminal board 3) E1 Terminal for earth 4) E2 Connector for terminal board (earth) 5) HL2, HN2 Connector for main PCB...
Page 33 SiBE04-808_B Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1): Filter PCB HL1 HN1 S (on main PCB) 3P203203-1 PCB (2): Main PCB LED A 2P203198-1 Printed Circuit Board Connector Wiring Diagram...
Page 34 Printed Circuit Board Connector Wiring Diagram SiBE04-808_B 1.2.2 RK(X)S20-35G2V1B9, ARXS20-35G3V1B 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...
Page 35 SiBE04-808_B Printed Circuit Board Connector Wiring Diagram 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 36 Printed Circuit Board Connector Wiring Diagram SiBE04-808_B 1.2.3 RK(X)S42G2V1B, ARXS42G2V1B Connectors and PCB (1): Control PCB 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...
Page 37 SiBE04-808_B Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1): Control PCB E (E2) HN1 HL1 LED A J5 J4 U, V, W 2P208173-1 Printed Circuit Board Connector Wiring Diagram...
Page 38 Printed Circuit Board Connector Wiring Diagram SiBE04-808_B 1.2.4 RK(X)S50G2V1B, ARXS50G2V1B 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...
Page 39 SiBE04-808_B Printed Circuit Board Connector Wiring Diagram 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 40: Part 4 Function And Control
SiBE04-808_B Part 4 Function and Control 1. Main Functions..................30 1.1 Frequency Principle................30 1.2 Airflow Direction Control.................32 1.3 Fan Speed Control for Indoor Units............33 1.4 Program Dry Operation ................34 1.5 Automatic Operation................35 1.6 Thermostat Control.................36 1.7 NIGHT SET Mode ..................37 1.8 ECONO Operation .................38 1.9 2-Area INTELLIGENT EYE Operation ...........39 1.10 INTELLIGENT EYE Operation ...............41 1.11 Inverter POWERFUL Operation .............42...
Page 41: Main Functions
SiBE04-808_B Main Functions 1. Main Functions Note: The definitions of temperatures are classified as following. Room temperature: temperature of the 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 42 Main Functions SiBE04-808_B 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 43: Airflow Direction Control
SiBE04-808_B Main Functions 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 44: Fan Speed Control For Indoor Units
Main Functions SiBE04-808_B 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 45: Program Dry Operation
SiBE04-808_B Main Functions 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 46: Automatic Operation
Main Functions SiBE04-808_B 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 47: Thermostat Control
SiBE04-808_B Main Functions 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 48: Night Set Mode
Main Functions SiBE04-808_B 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 49: Econo Operation
SiBE04-808_B Main Functions ECONO Operation Outline 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 50: 2-Area Intelligent Eye Operation
Main Functions SiBE04-808_B 2-Area INTELLIGENT EYE Operation Outline For FTK(X)S Model 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 51 SiBE04-808_B Main Functions 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 52: Intelligent Eye Operation
Main Functions SiBE04-808_B 1.10 INTELLIGENT EYE Operation Outline For ATXS Model This is the function that detects existence of humans in the room by a motion sensor (INTELLIGENT EYE) and reduces the capacity when there is nobody in the room in order to save electricity.
Page 53: Inverter Powerful Operation
SiBE04-808_B 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 54: Other Functions
Main Functions SiBE04-808_B 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 55: Function Of Thermistor
SiBE04-808_B Function of Thermistor 2. Function of Thermistor Four way valve Compressor (R11582) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge pipe temperature. The system sets the target discharge pipe temperature according to the Exchanger outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve Thermistor...
Page 56: Control Specification
Control Specification SiBE04-808_B 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 57: Frequency Control
SiBE04-808_B 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 58 Control Specification SiBE04-808_B 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 59: Controls At Mode Changing / Start-Up
SiBE04-808_B 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)S20-42G2V1B, ARXS20-42G2V1B ON Condition When the discharge pipe temperature is below 10ºC, the inverter operation in open phase...
Page 60 Control Specification SiBE04-808_B 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 61: Discharge Pipe Temperature Control
SiBE04-808_B 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 62: Input Current Control
Control Specification SiBE04-808_B 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 63 SiBE04-808_B Control Specification RK(X)S20-35G2V1B9, ARXS20-35G3V1B 20 class 25 class 35 class Cooling Heating Cooling Heating Cooling Heating 9.25 9.25 9.25 Normal mode 6.25 8.25 ECONO mode 3.25 3.25 3.25 Normal mode 5.25 6.75 6.75 ECONO mode Limitation of current drooping and stop value according to the outdoor temperature The current droops when outdoor temperature becomes higher than a certain level (depending on the model).
Page 64: Freeze-Up Protection Control
Control Specification SiBE04-808_B 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 65: Outdoor Fan Control
SiBE04-808_B Control Specification 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 66: Defrost Control
Control Specification SiBE04-808_B 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 67: Electronic Expansion Valve Control
SiBE04-808_B Control Specification 3.11 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Open Control 1.
Page 68 Control Specification SiBE04-808_B 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 69 SiBE04-808_B Control Specification 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 70: Malfunctions
Control Specification SiBE04-808_B 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 71: Standby Electricity Saving
SiBE04-808_B Control Specification 3.13 Standby Electricity Saving 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. For 20/25/35 class models, field setting is required for turning ON the function. Refer to “Standby Electricity Saving”...
Page 72: Part 5 Operation Manual
SiBE04-808_B Part 5 Operation Manual 1. System Configuration................62 2. FTXS20/25/35/42/50G2V1B ..............63 2.1 Remote Controller ..................63 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........64 2.3 Adjusting the Airflow Direction..............66 2.4 COMFORT AIRFLOW and INTELLIGENT EYE Operation....68 2.5 POWERFUL Operation ................71 2.6 OUTDOOR UNIT QUIET Operation............72 2.7 ECONO Operation .................73 2.8 TIMER Operation ...................74...
Page 73: System Configuration
SiBE04-808_B 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 74: Ftxs20/25/35/42/50G2V1B
FTXS20/25/35/42/50G2V1B SiBE04-808_B 2. FTXS20/25/35/42/50G2V1B Remote Controller Remote Controller <Open the front cover> <ARC452A3> 1. Signal transmitter: 11. SWING button: • It sends signals to the indoor unit. • Vertical blades (louvers) (page 12.) 2. Display: 12. COMFORT/SENSOR button: • It displays the current settings. •...
Page 75: Auto · Dry · Cool · Heat · Fan Operation
SiBE04-808_B FTXS20/25/35/42/50G2V1B 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 76 FTXS20/25/35/42/50G2V1B SiBE04-808_B To change the airflow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of airflow rate setting from “ ” to “ ” plus “ ” “ ” are available. The airflow rate setting is not variable.
Page 77: Adjusting The Airflow Direction
SiBE04-808_B FTXS20/25/35/42/50G2V1B Adjusting the Airflow Direction Adjusting the Airflow Direction You can adjust the airflow direction to increase your comfort. To adjust the horizontal blades (flaps) 1. Press “SWING button ”. • “ ” is displayed on the LCD and the flaps will begin to swing.
Page 78 FTXS20/25/35/42/50G2V1B SiBE04-808_B To start 3-D Airflow 1. 3. Press the “SWING button ” and the “SWING button ”: the “ ” and “ ” display will light up and the flap and louvers will move in turn. To cancel 3-D Airflow 2.
Page 79: Comfort Airflow And Intelligent Eye Operation
SiBE04-808_B FTXS20/25/35/42/50G2V1B COMFORT AIRFLOW and INTELLIGENT EYE Operation COMFORT AIRFLOW and INTELLIGENT EYE Operation The INTELLIGENT EYE incorporates infrared sensors to detect the presence of people in the conditioned room. When these sensors detect people, the louvers will adjust the airflow direction to an area where people are not present.
Page 80 FTXS20/25/35/42/50G2V1B SiBE04-808_B 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. • The volume of air will be set to AUTO. If the upward and downward airflow direction is selected, the COMFORT AIRFLOW function will be canceled.
Page 81 SiBE04-808_B FTXS20/25/35/42/50G2V1B COMFORT AIRFLOW and INTELLIGENT EYE Operation Notes on “INTELLIGENT EYE Operation” • While the air conditioner is in INTELLIGENT EYE operation, the louvers will adjust the airflow direction if there are people in the sensing areas of the INTELLIGENT EYE so that the leftward or rightward airflow will not be directed to the people.
Page 82: Powerful Operation
FTXS20/25/35/42/50G2V1B SiBE04-808_B 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 button”. • POWERFUL operation ends in 20minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.
Page 83: Outdoor Unit Quiet Operation
SiBE04-808_B FTXS20/25/35/42/50G2V1B 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 84: Econo Operation
FTXS20/25/35/42/50G2V1B SiBE04-808_B 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 85: Timer Operation
SiBE04-808_B FTXS20/25/35/42/50G2V1B TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...
Page 86 FTXS20/25/35/42/50G2V1B SiBE04-808_B To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press “ON TIMER button”. is displayed. blinks. Press “SELECT button” until the time setting reaches the point you like.
Page 87: Weekly Timer Operation
SiBE04-808_B FTXS20/25/35/42/50G2V1B 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 88 FTXS20/25/35/42/50G2V1B SiBE04-808_B 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 27˚C 6:00...
Page 89 SiBE04-808_B FTXS20/25/35/42/50G2V1B WEEKLY TIMER Operation Press “SELECT button” to select the desired temperature. • The temperature can be set between 10˚C and 32˚C. Cooling: The unit operates at 18˚C even if it is set at 10 to 17˚C. Heating: The unit operates at 30˚C even if it is set at 31 to 32˚C.
Page 90: Copy Mode
FTXS20/25/35/42/50G2V1B SiBE04-808_B 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 8:30...
Page 91 SiBE04-808_B FTXS20/25/35/42/50G2V1B WEEKLY TIMER Operation Confirming a reservation • The reservation can be confirmed. Press “ button”. • The day of the week and the reservation number of the current day will be displayed. Press “SELECT button” to select the day of the week and the reservation number to be confirmed.
Page 92: Atxs20/25/35/42/50G2V1B
ATXS20/25/35/42/50G2V1B SiBE04-808_B 3. ATXS20/25/35/42/50G2V1B Remote Controller Remote Controller < > ARC433A85 1. Signal transmitter: QUIET button: OUTDOOR UNIT QUIET operation (page 18.) • It sends signals to the indoor unit. 9. FAN setting button: 2. Display: • It selects the airflow rate setting. •...
Page 93: Auto · Dry · Cool · Heat · Fan Operation
SiBE04-808_B ATXS20/25/35/42/50G2V1B 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 94 ATXS20/25/35/42/50G2V1B SiBE04-808_B To change the airflow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of airflow rate setting from “ ” to “ ” plus “ ” “ ” are available. The airflow rate setting is not variable.
Page 95: Adjusting The Airflow Direction
SiBE04-808_B ATXS20/25/35/42/50G2V1B Adjusting the Airflow Direction Adjusting the Airflow Direction You can adjust the airflow direction to increase your comfort. To adjust the horizontal blades (flaps) 1. Press “SWING button”. • “ ” is displayed on the LCD and the flaps will begin to swing.
Page 96 ATXS20/25/35/42/50G2V1B SiBE04-808_B To start 3-D Airflow 1. 3. Press the “SWING button ” and the “SWING button ”: the “ ” and “ ”display will light up and the flap and louvers will move in turn. To cancel 3-D Airflow 2.
Page 97: Comfort Airflow Operation
SiBE04-808_B ATXS20/25/35/42/50G2V1B COMFORT AIRFLOW Operation COMFORT AIRFLOW Operation The flow of air will be in the upward direction while in cooling mode and in the downward direction while in heating mode, which will provide a comfortable wind that will not come in direct contact with people. To start COMFORT AIRFLOW operation Press “COMFORT/SENSOR button”...
Page 98: Intelligent Eye Operation
ATXS20/25/35/42/50G2V1B SiBE04-808_B INTELLIGENT EYE Operation INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation Press “COMFORT/SENSOR button” and select “ ” on the LCD. • Each time the “COMFORT/SENSOR button” is pressed a different setting option is displayed on the LCD.
Page 99 SiBE04-808_B ATXS20/25/35/42/50G2V1B INTELLIGENT EYE Operation “INTELLIGENT EYE” is useful for Energy Saving Energy saving operation • Change the temperature –2˚C in heating / +2˚C in cooling / +2˚C in dry mode from set temperature. • Decrease the airflow rate slightly in FAN mode only. If no presence detected in the room for 20 minutes.
Page 100: Powerful Operation
ATXS20/25/35/42/50G2V1B SiBE04-808_B 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 button”. • POWERFUL operation ends in 20minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.
Page 101: Outdoor Unit Quiet Operation
SiBE04-808_B ATXS20/25/35/42/50G2V1B 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 102: Econo Operation
ATXS20/25/35/42/50G2V1B SiBE04-808_B ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by limiting the maximum power consumption value. To start ECONO operation 1. Press “ECONO button” . • “ ”is displayed on the LCD. To cancel ECONO operation 2.
Page 103: Timer Operation
SiBE04-808_B ATXS20/25/35/42/50G2V1B TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...
Page 104 ATXS20/25/35/42/50G2V1B SiBE04-808_B To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press “ON TIMER button”. is displayed. blinks. Press “TIMER Setting button” until the time setting reaches the point you like.
Page 105: Part 6 Service Diagnosis
SiBE04-808_B Part 6 Service Diagnosis 1. Caution for Diagnosis................95 1.1 Troubleshooting with LED ..............95 2. Problem Symptoms and Measures ............96 3. Service Check Function ................97 3.1 ARC452 Series..................97 3.2 ARC433 Series..................100 4. Troubleshooting ..................103 4.1 Error Codes and Description ..............103 4.2 Indoor Unit PCB Abnormality ...............104 4.3 Freeze-up Protection Control or Heating Peak-cut Control....105 4.4 Fan Motor (DC Motor) or Related Abnormality........107...
Page 106: Caution For Diagnosis
Caution for Diagnosis SiBE04-808_B 1. Caution for Diagnosis Troubleshooting with LED Indoor Unit 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 107: Problem Symptoms And Measures
SiBE04-808_B Problem Symptoms and Measures 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page The units does not operate. Check the power supply. Check to make sure that the rated voltage is — supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...
Page 108: Service Check Function
Service Check Function SiBE04-808_B 3. Service Check Function ARC452 Series Check Method 1 1. When the timer cancel button is held down for 5 seconds, “ ” indication appears on the temperature display section. TIMER CANCEL button < ARC452 Series > (R12205) 2.
Page 109 SiBE04-808_B 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 110 Service Check Function SiBE04-808_B 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 111: Arc433 Series
SiBE04-808_B Service Check Function ARC433 Series Check Method 1 1. When the timer cancel button is held down for 5 seconds, “ ” indication appears on the temperature display section. TIMER CANCEL button < ARC433 Series > (R11949) 2. Press the timer cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below.
Page 112 Service Check Function SiBE04-808_B Check Method 2 1. Press the center of the TEMP button and the MODE button at the same time. (R4272) The figure of the ten’s place blinks. (R4273) 2. Press the TEMP ▲ or ▼ button and change the figure until you hear the sound of “beep” or “pi pi”.
Page 113 SiBE04-808_B Service Check Function 5. Press the TEMP ▲ or ▼ button and change the figure until you hear the sound of “beep”. (R4277) 6. Diagnose by the sound. ★ “pi” : The figure of the ten’s place does not accord with the error code. ★...
Page 114: Troubleshooting
Troubleshooting SiBE04-808_B 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 115: Indoor Unit Pcb Abnormality
SiBE04-808_B Troubleshooting Indoor Unit PCB Abnormality Remote Controller Display Method of Evaluation of zero-cross detection of power supply by the indoor unit PCB. Malfunction Detection Malfunction There is no zero-cross detection in approximately 10 seconds. Decision Conditions Supposed Wrong models interconnected Defective indoor unit PCB Causes Disconnection of connector...
Page 116: Freeze-Up Protection Control Or Heating Peak-Cut Control
Troubleshooting SiBE04-808_B Freeze-up Protection Control or Heating Peak-cut Control Remote Controller Display Method of Freeze-up protection control Malfunction During cooling operation, the freeze-up protection control (operation halt) is activated 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 117 SiBE04-808_B Troubleshooting 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.148 Is there any short circuit? Provide sufficient air passage. Check the air filter.
Page 118: Fan Motor (Dc Motor) Or Related Abnormality
Troubleshooting SiBE04-808_B 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 119 SiBE04-808_B Troubleshooting 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.146 and rotate the fan by hand. Does the fan Replace the indoor rotate smoothly? fan motor.
Page 120: Thermistor Or Related Abnormality (Indoor Unit)
Troubleshooting SiBE04-808_B 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 121: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)
SiBE04-808_B Troubleshooting 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 122: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)
Troubleshooting SiBE04-808_B 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 123: Outdoor Unit Pcb Abnormality
SiBE04-808_B Troubleshooting Outdoor Unit PCB Abnormality Remote Controller Display Method of The system follows the microprocessor program as specified. The system checks to see if the zero-cross signal comes in properly. Malfunction Detection Malfunction The microprocessor program runs out of control. The zero-cross signal is not detected.
Page 124 Troubleshooting SiBE04-808_B Troubleshooting 42 class Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn on the power again. Check the voltage between No.1 and No.2 on the outdoor terminal board.
Page 125: Ol Activation (Compressor Overload)
SiBE04-808_B 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 126: Compressor Lock
Troubleshooting SiBE04-808_B 4.10 Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the position detection circuit. Malfunction 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 127: Dc Fan Lock
SiBE04-808_B 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 128: Input Overcurrent Detection
Troubleshooting SiBE04-808_B 4.12 Input Overcurrent Detection Remote Controller Display Method of An input overcurrent is detected by checking the input current value with the compressor running. Malfunction Detection Malfunction The following current with the compressor running continues for 2.5 seconds. Cooling / Heating: Above 9.25 ~ 20 A (Refer to “Input current control”...
Page 129: Four Way Valve Abnormality
SiBE04-808_B Troubleshooting 4.13 Four Way Valve Abnormality Remote Controller Display Method of The room temperature thermistor, the indoor heat exchanger thermistor, the outdoor temperature thermistor, and the outdoor heat exchanger thermistor are checked if they function Malfunction 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 130 Troubleshooting SiBE04-808_B 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.147 disconnected (loose)? Check No.06 Harness out of connector? Refer to P.148 Reconnect it.
Page 131: Discharge Pipe Temperature Control
SiBE04-808_B 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 132 Troubleshooting SiBE04-808_B 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.146 Replace the defective Check the thermistors. • Discharge pipe thermistor thermistor.
Page 133: High Pressure Control In Cooling
SiBE04-808_B 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 the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Malfunction Detection Malfunction The temperature sensed by the outdoor heat exchanger thermistor rises above A °C.
Page 134 Troubleshooting SiBE04-808_B Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Check the installation space. Refer to P.146 Check No. 07 Check No.06 Change the installation Check the installation Refer to P.148 location or direction.
Page 135: Compressor System Sensor Abnormality
SiBE04-808_B Troubleshooting 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 136 Troubleshooting SiBE04-808_B 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 137: Position Sensor Abnormality
SiBE04-808_B Troubleshooting 4.17 Position Sensor Abnormality Remote Controller Display Method of A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Malfunction 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 138 Troubleshooting SiBE04-808_B 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.152 Turn off the power. Check No.29 Check the power supply voltage. Refer to P.155 Voltage as rated? Correct the power supply.
Page 139 SiBE04-808_B Troubleshooting 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.152 Turn off the power. Check the power supply voltage. Voltage as rated? Correct the power supply.
Page 140: Dc Voltage / Current Sensor Abnormality (20/25/35/42 Class)
Troubleshooting SiBE04-808_B 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 141: Ct Or Related Abnormality (50 Class)
SiBE04-808_B Troubleshooting 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- detected input current. Malfunction Detection Malfunction The compressor running frequency is more than 55 Hz, and the CT input current is below 0.5 A.
Page 142 Troubleshooting SiBE04-808_B 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.151 again. Check No.14 Start operation. Refer to P.152 ∗...
Page 143: Thermistor Or Related Abnormality (Outdoor Unit)
SiBE04-808_B Troubleshooting 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. A thermistor fault is identified based on the temperature sensed by each thermistor. Malfunction Detection Malfunction...
Page 144 Troubleshooting SiBE04-808_B Troubleshooting In case of “ ” “ ” “ ” 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.148 Error displayed Reconnect the connectors again on remote...
Page 145: Electrical Box Temperature Rise
SiBE04-808_B Troubleshooting 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 compressor off. Malfunction 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 146 Troubleshooting SiBE04-808_B Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. WARNING Check No.07 Turn off the power and turn it on again. To cool the electrical components, Refer to P.149 the outdoor fan starts when the radiation fin temperature rises above C ˚C and stops when it...
Page 147: Radiation Fin Temperature Rise
SiBE04-808_B Troubleshooting 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 compressor on. Malfunction 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 148 Troubleshooting SiBE04-808_B 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.149 again to start the system. Check No.09 Refer to P.150 Error displayed again?
Page 149: Output Overcurrent Detection
SiBE04-808_B Troubleshooting 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 150 Troubleshooting SiBE04-808_B 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.149 following procedure.
Page 151: Refrigerant Shortage
SiBE04-808_B Troubleshooting 4.24 Refrigerant Shortage Remote Controller Display Method of Refrigerant shortage detection I: Refrigerant shortage is detected by checking the input current value and the compressor Malfunction 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 152 Troubleshooting SiBE04-808_B 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 153 SiBE04-808_B Troubleshooting 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.146 Any thermistor Replace them in position. disconnected? ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗...
Page 154: Low-Voltage Detection Or Over-Voltage Detection
Troubleshooting SiBE04-808_B 4.25 Low-voltage Detection or Over-voltage Detection Remote Controller Display Method of Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Malfunction 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 155 SiBE04-808_B Troubleshooting 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 156: Signal Transmission Error On Outdoor Unit Pcb (50 Class Only)
Troubleshooting SiBE04-808_B 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 157: Check
SiBE04-808_B Check 5. Check How to Check 5.1.1 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.
Page 158 Check SiBE04-808_B 5.1.3 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 159: Thermistor Resistance Check
SiBE04-808_B Check 5.1.4 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.
Page 160: Installation Condition Check
Check SiBE04-808_B 5.1.5 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 161 SiBE04-808_B Check 5.1.7 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) 5.1.8 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between No.
Page 162 Check SiBE04-808_B 5.1.10 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) Reactor lead wire...
Page 163 SiBE04-808_B Check 5.1.12 “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 164 Check SiBE04-808_B Step 3 20/25/35/50 class: Activate inverter test operation from the outdoor unit. 1) Press the forced cooling operation ON/OFF button for 5 seconds. (Refer to page 289 for the position.) -> Inverter test operation starts. 42 class: Activate inverter test operation from indoor unit. 1) Turn the power on.
Page 165 SiBE04-808_B Check 5.1.13 Rotation Pulse Check on the Outdoor Unit PCB Check No.15 RK(X)S20-50G2V1B, ARXS20-50G2V1B Make sure that the voltage of 320 ± 30 V is applied. 1. Set operation off and power off. Disconnect the connector S70. 2. Check that the voltage between the pins 4 - 7 is 320 VDC. 3.
Page 166: Main Circuit Short Check
Check SiBE04-808_B 5.1.14 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. ∞...
Page 167: Part 7 Removal Procedure
SiBE04-808_B Part 7 Removal Procedure 1. Indoor Unit...................157 1.1 Removal of Air Filter................157 1.2 Removal of Front Panel................159 1.3 Removal of Front Grille ................161 1.4 Removal of Horizontal Blades / Vertical Blades ........164 1.5 Removal of Electrical Box ..............167 1.6 Removal of PCB...................170 1.7 Removal of Indoor Heat Exchanger .............175 1.8 Removal of Swing Motors ..............178 1.9 Removal of Fan Motor................182...
Page 168: Indoor Unit
Indoor Unit SiBE04-808_B 1. Indoor Unit Removal of Air Filter Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Appearance features Warning Dangerous: High voltage A high voltage is applied to all the electric circuits of this product including thermistors.
Page 169 SiBE04-808_B Indoor Unit Step Procedure Points 3. Remove the Titanium apatite photocatalytic air- purifying filter. 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 170: Removal Of Front Panel
Indoor Unit SiBE04-808_B Removal of Front Panel Procedure Warning Be sure to wait 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 171 SiBE04-808_B Indoor Unit 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 172: Removal Of Front Grille
Indoor Unit SiBE04-808_B Removal of Front Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the service cover. Remove the screw of Preparation Service cover the service cover.
Page 173 SiBE04-808_B Indoor Unit 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 174 Indoor Unit SiBE04-808_B 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 175: Removal Of Horizontal Blades / Vertical Blades
SiBE04-808_B Indoor Unit Removal of Horizontal Blades / Vertical Blades Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the horizontal blade (large). Open the horizontal Caution on Mounting blade (large).
Page 176 Indoor Unit SiBE04-808_B 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 177 SiBE04-808_B Indoor Unit Step Procedure Points 4. Remove the vertical blade ASSY. 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 178: Removal Of Electrical Box
Indoor Unit SiBE04-808_B Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points The figure shows the Preparation Electrical box connections of wire Remove the front grille harnesses.
Page 179 SiBE04-808_B Indoor Unit 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 180 Indoor Unit SiBE04-808_B 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 181: Removal Of Pcb
SiBE04-808_B Indoor Unit Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the shield plate. The figure shows the Preparation appearance of the Remove the electrical box Shield plate electrical box.
Page 182 Indoor Unit SiBE04-808_B 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 183 SiBE04-808_B Indoor Unit 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 184 Indoor Unit SiBE04-808_B 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 185 SiBE04-808_B Indoor Unit 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 186: Removal Of Indoor Heat Exchanger
Indoor Unit SiBE04-808_B Removal of Indoor Heat Exchanger Procedure Warning Be sure to turn off all power supplies at least 10 min. 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 187 SiBE04-808_B Indoor Unit 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 188 Indoor Unit SiBE04-808_B Step Procedure Points After unfastening the When mounting the indoor Indoor heat exchanger lower hooks, lift up the heat exchanger, make sure indoor heat exchanger that the hook (right) is by its right side. fastened. Hook (R10327) Remove the indoor heat exchanger.
Page 189: Removal Of Swing Motors
SiBE04-808_B Indoor Unit Removal of Swing Motors Procedure Warning Be sure to turn off all power supplies at least 10 minutes before disassembling work. Step Procedure Points 1. Remove the swing motor for vertical blade. Lift the indoor unit with a wooden base.
Page 190 Indoor Unit SiBE04-808_B 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 191 SiBE04-808_B Indoor Unit 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 192 Indoor Unit SiBE04-808_B 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 193: Removal Of Fan Motor
SiBE04-808_B Indoor Unit Removal of Fan Motor Procedure Warning Be sure to turn off all power supplies at least 10 min. 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 194 Indoor Unit SiBE04-808_B 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 195 SiBE04-808_B Indoor Unit 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 196: Outdoor Unit - Rk(X)S20-35G2V1B, Arxs20-35G2V1B
Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B 2. Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B 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. Step Procedure Points 1.
Page 197 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Procedure Points Step 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...
Page 198 Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Procedure Points Step Remove the 8 screws of the front panel. Front panel (R7194) Unfasten the hooks. The front panel has 4 hooks. Pull and remove the front panel. Hooks (R7195) Removal Procedure...
Page 199 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Procedure Points Step 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 (R7196) Remove the outdoor When reassembling, align fan.
Page 200 Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Procedure Points Step Disconnect the [S70] connector for the fan motor [S70]. (R9332) Release the fan motor Fan motor lead wire from the hook. lead wire (R7200) Open the hooks and When reassembling, put the release the fan motor fan motor lead wire through lead wire.
Page 201 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Procedure Points Step Remove the screw and remove the fan motor fixing frame. Fan motor fixing frame (R7204) (R7205) When reassembling, fit the lower hooks into the bottom frame. (R7206) Removal Procedure...
Page 202 Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Procedure Points Step 4. Remove the right side panel. Remove the 2 screws on the rear side. (R7207) Release the outdoor Outdoor temperature thermistor temperature thermistor. (R7208) Lift up the guard net Guard net and remove it.
Page 203 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Procedure Points Step Remove the 4 screws on the right side panel. Right side panel (R7210) Remove the screw near the stop valves. (R7211) Removal Procedure...
Page 204 Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Procedure Points Step Unfasten the hook on When reassembling, make the rear side. sure to fit the hook. (R7212) Lift up the right side When reassembling, make panel and remove it. sure to fit the hook. Hook (R7213) Removal Procedure...
Page 205: Removal Of Electrical Box
SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B 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 2 Preparation connectors for the Remove the panels and reactor.
Page 206 Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Procedure Points Step Disconnect the [S90] [S50] connectors for the magnetic relay [S50] and for the thermistors [S90]. (R9341) Disconnect the [S40] [S10] connectors for the filter PCB [S10] and for the overload protector [S40].
Page 207 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Procedure Points Step Disconnect the [HN3] [HL3] connectors for the filter PCB [HL3] [HN3]. (R9344) Remove the wire Wire harness harness for standby electricity saving. (R9345) Cut the clamps at 2 locations. (R9346) Removal Procedure...
Page 208 Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Procedure Points Step Lift and remove the Electrical box electrical box. (R9348) Removal Procedure...
Page 209: Removal Of Thermistors
SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Removal of Thermistors Procedure Warning Be sure to wait 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 210 Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Procedure Points Step Feature of the thermistors (R9356) Removal Procedure...
Page 211: Removal Of Pcb
SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the main PCB. You can remove the main PCB when you disconnect Feature of the main the lead wires on the...
Page 212 Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Procedure Points Step Remove the 4 screws. Screws (R9359) Unfasten the 3 hooks on the upper side. (R9360) Lift and pull out the main PCB. (R9361) Removal Procedure...
Page 213 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Procedure Points Step Feature of the main Refer to page 22 for detail. [S30] [S10] [S40] [S90] [S50] [S10] [HL3] [HN3]: filter PCB [S20]: electronic expansion valve coil [S30]: compressor [S40]: overload protector [S50]: magnetic relay [S70]: fan motor [S70] [S80]: four way valve coil...
Page 214: Removal Of Reactor / Partition Plate
Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Removal of Reactor / Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the reactor. Preparation Reactor Remove the outer panels Remove the screw and according to the “Removal of...
Page 215 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Procedure Points Step The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. (R7227) When reassembling, fit the lower hook into the bottom frame. Hook (R7228) Removal Procedure...
Page 216: Removal Of Sound Blanket
Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Removal of Sound Blanket Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Untie the string and Preparation open the sound blanket Remove the outer panels (outer).
Page 217: Removal Of Four Way Valve
SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B 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 218 Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B Procedure Points Step 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 219 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Procedure Points Step 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 220: Removal Of Compressor
Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B SiBE04-808_B 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 the pipes and other parts that are heated by the...
Page 221 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B, ARXS20-35G2V1B Procedure Points Step 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 222: Outdoor Unit - Rk(X)S20-35G2V1B9, Arxs20-35G3V1B
Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B 3. Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Removal of Outer Panels / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1.
Page 223 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step 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...
Page 224 Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Procedure Points Step 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 225 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step 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 (R11827) Remove the outdoor When reassembling, align fan.
Page 226 Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Procedure Points Step 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 227 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step 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 228 Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Procedure Points Step 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).
Page 229 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step 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.
Page 230 Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Procedure Points Step 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 231: Removal Of Electrical Box
SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the Preparation connector for the Remove the panels and overload protector disconnect the connector for [S40].
Page 232 Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Procedure Points Step 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 233 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step 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 234: Removal Of Pcb
Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the main PCB. You can remove the main PCB when you disconnect Feature of the main the lead wires on the...
Page 235 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step 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 236 Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Procedure Points Step 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 237 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step 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 238 Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Procedure Points Step Remove the 6 screws. (R11866) Unfasten the 4 hooks and remove the main PCB. (R11867) Refer to page 24 for detail. [S50] [S100] [S10] [HL3] [HN3]: filter PCB [S20]: electronic expansion valve coil [HN3] [S40]: overload protector...
Page 239 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step 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 240 Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Procedure Points Step 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 241 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step Feature of the filter Refer to page 24 for detail. (R11878) Removal Procedure...
Page 242: Removal Of Reactor / Partition Plate
Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Removal of Reactor / Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the reactor. Preparation Reactor Remove the outer panels Remove the screw and according to the “Removal of...
Page 243 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step 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 244: Removal Of Sound Blanket
Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the sound Since the piping ports are blanket (top).
Page 245 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step Pull the sound blanket (inner) out. Sound blanket (inner) (R11887) Pull the sound blanket (bottom) out. Sound blanket (bottom) (R11888) Removal Procedure...
Page 246: Removal Of Four Way Valve
Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Removal of Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Pull out the electronic expansion valve coil. Electronic expansion valve coil...
Page 247 SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Procedure Points Step 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 248 Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B Procedure Points Step 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 249: Removal Of Compressor
SiBE04-808_B Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 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 250 Outdoor Unit - RK(X)S20-35G2V1B9, ARXS20-35G3V1B SiBE04-808_B 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 251: Outdoor Unit - Rk(X)S42G2V1B, Arxs42G2V1B
SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B 4. Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Appearance features (R7186) (R12281) 2.
Page 252 Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Procedure Points Step 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 253: Removal Of Electrical Box
SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Disconnect the When reassembling, fasten connecting wires. the wires with screws on the terminal board.
Page 254 Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Procedure Points Step 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]...
Page 255 SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Procedure Points Step 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 connector for the...
Page 256 Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Procedure Points Step 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...
Page 257 SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Procedure Points Step Remove the screw in front of the electrical box. (R0263) Lift and remove the electrical box. (R0264) Removal Procedure...
Page 258: Removal Of Pcb
Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the screw and Preparation remove the electrical Remove the panels Electrical box cover box cover.
Page 259 SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Procedure Points Step 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 260 Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Procedure Points Step 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 261 SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Procedure Points Step Remove the PCB. (R8168) Detach the terminals Refer to page 26 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...
Page 262 Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Procedure Points Step Remove the screw of the radiation fin. Radiation fin (R12214) (R8171) Removal Procedure...
Page 263: Removal Of Sound Blanket
SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the partition plate. Partition plate Remove the 2 screws. When reassembling, fit the lower hook into the bottom frame.
Page 264 Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Procedure Points Step 2. Remove of the sound Since the piping ports are blanket. torn easily, remove the blanket carefully. Untie the string, open the sound blanket (outer) and pull it out. (R12199) Sound blanket (outer) (R8180) Remove the sound Sound blanket (top upper)
Page 265: Removal Of Outdoor Fan / Fan Motor
SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Removal of Outdoor Fan / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the outdoor fan. The screw has reverse winding.
Page 266 Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Procedure Points Step 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 267 SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Procedure Points Step 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 268: Removal Of Thermistors
Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Removal of Thermistors Procedure Warning Be sure to wait 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 269: Removal Of Four Way Valve / Electronic Expansion Valve
SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Removal of Four Way Valve / Electronic Expansion Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the peripheries. Preparation Remove the sound blanket.
Page 270 Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Procedure Points Step 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...
Page 271 SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Procedure Points Step 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 272: Removal Of Compressor
Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal Terminal cover cover. (R8195) Disconnect the lead Red (U) wires of the compressor.
Page 273 SiBE04-808_B Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B Procedure Points Step 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 274 Outdoor Unit - RK(X)S42G2V1B, ARXS42G2V1B SiBE04-808_B Procedure Points Step 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 275: Outdoor Unit - Rk(X)S50G2V1B, Arxs50G2V1B
SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B 5. Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the panels. Remove the 4 screws Top panel and lift the top panel.
Page 276 Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B Procedure Points Step 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 277 SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B Procedure Points Step 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.
Page 278 Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B Procedure Points Step 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 279: Removal Of Outdoor Fan / Fan Motor
SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B 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 280 Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B Procedure Points Step (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 281 SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B Procedure Points Step 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 282 Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B Procedure Points Step 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 283: Removal Of Electrical Box
SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B 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 284 Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B Procedure Points Step 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 285 SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B Procedure Points Step 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]...
Page 286 Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B Procedure Points Step 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 287 SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B Procedure Points Step Release the harness of the outdoor temperature thermistor from the hook. (R9403) Lift and remove the electrical box. Electrical box (R5279) Removal Procedure...
Page 288: Removal Of Pcb
Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B 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...
Page 289 SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B Procedure Points Step 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 290 Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B Procedure Points Step 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 28 for detail. main PCB. Main PCB (R5289) Removal Procedure...
Page 291: Removal Of Sound Blanket / Thermistors
SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B Removal of Sound Blanket / 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...
Page 292 Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B Procedure Points Step 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 293: Removal Of Four Way Valve
SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B Removal of Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the screw and remove the four way Warning valve coil.
Page 294: Removal Of Electronic Expansion Valve
Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B 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 295: Removal Of Compressor
SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B 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 296 Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B SiBE04-808_B Procedure Points Step 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 297 SiBE04-808_B Outdoor Unit - RK(X)S50G2V1B, ARXS50G2V1B Procedure Points Step 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 298: Part 8 Trial Operation And Field Settings
SiBE04-808_B Part 8 Trial Operation and Field Settings 1. Pump Down Operation................288 2. Forced Cooling Operation Mode ............289 3. Trial Operation ..................291 4. Field Settings ..................293 4.1 Model Type Setting ................293 4.2 When 2 Units are Installed in 1 Room..........293 4.3 Standby Electricity Saving..............294 4.4 Facility Setting Jumper and Switch (cooling at low outdoor temperature)............295...
Page 299: Pump Down Operation
SiBE04-808_B Pump Down Operation 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. Detail 1) Remove the valve caps from the liquid stop valve and the gas stop valve. 2) Carry out forced cooling operation.
Page 300: Forced Cooling Operation Mode
Forced Cooling Operation Mode SiBE04-808_B 2. Forced Cooling Operation Mode Outline Forced operation mode includes only forced cooling. Detail Item Forced Cooling Conditions 1) The outdoor unit is not abnormal and not in the 3-minute standby mode. 2) The outdoor unit is not operating. The forced cooling operation is allowed when the above both conditions are met.
Page 301 SiBE04-808_B Forced Cooling Operation Mode Outdoor Unit (RK(X)S20/25/35G2V1B9, ARXS20/25/35G3V1B) Screwdriver Push here (R13824) Outdoor Unit (RK(X)S50G2V1B, ARXS50G2V1B) 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.
Page 302: Trial Operation
Trial Operation SiBE04-808_B 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 303 SiBE04-808_B Trial Operation ARC433 Series (1) Press the ON/OFF button to turn on the system. (2) Press the center of the TEMP button and the MODE button at the same time. (3) Press the MODE button twice. (“ ” appears on the display to indicate that trial operation is selected.) (4) Press the MODE button and select operation mode.
Page 304: Field Settings
Field Settings SiBE04-808_B 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 305: Standby Electricity Saving
SiBE04-808_B Field Settings Wireless Remote (1) Remove the cover and take it off. (2) Cut the address setting jumper J4. Controller <ARC452 series> <ARC433 series> Jumper Address EXIST ADDRESS:J4 (R6573) EXIST (R12065) 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 306: Facility Setting Jumper And Switch (Cooling At Low Outdoor Temperature)
Field Settings SiBE04-808_B 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 307: Jumper And Switch Settings
SiBE04-808_B Field Settings RKS50G2V1B 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 308: Application Of Silicon Grease To A Power Transistor And A Diode Bridge
Application of Silicon Grease to a Power Transistor and a Diode Bridge SiBE04-808_B 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 309: Part 9 Appendix
SiBE04-808_B Part 9 Appendix 1. Piping Diagrams..................299 1.1 Indoor Unit....................299 1.2 Outdoor Unit ..................300 2. Wiring Diagrams..................304 2.1 Indoor Unit....................304 2.2 Outdoor Unit ..................304 Appendix...
Page 310: Piping Diagrams
Piping Diagrams SiBE04-808_B 1. Piping Diagrams Indoor Unit FTXS20/25/35/42G2V1B, FTXS50G2V1B, ATXS50G2V1B ATXS20/25/35/42G2V1B 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...
Page 311: Outdoor Unit
SiBE04-808_B Piping Diagrams Outdoor Unit 1.2.1 Cooling Only RKS20G2V1B, RKS20G2V1B9 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...
Page 312 Piping Diagrams SiBE04-808_B RKS42G2V1B 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 313 SiBE04-808_B Piping Diagrams 1.2.2 Heat Pump RXS20G2V1B, ARXS20G2V1B, RXS20G2V1B9, ARXS20G3V1B 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...
Page 314 Piping Diagrams SiBE04-808_B RXS42G2V1B, ARXS42G2V1B 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 315: Wiring Diagrams
SiBE04-808_B Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTXS20/25/35/42/50G2V1B, ATXS20/25/35/42/50G2V1B FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A LED1 OUTDOOR LED2 CAUTION LED3 TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN.
Page 316 Wiring Diagrams SiBE04-808_B RK(X)S20/25/35G2V1B9, ARXS20/25/35G3V1B FIELD WIRING. indoor MRM20 IPM1 MRM10 C119 MR30 3.15A PCB2 3.15A W V U IPM2 MR30_A MR30_B MRCW S100 PCB1 X11A S80 1 10 11 outdoor NOTE 1.REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. t˚...
Page 317 SiBE04-808_B Wiring Diagrams RXS42G2V1B, ARXS42G2V1B indoor PCB1 MRM20 HR1 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 : ELECTRONIC EXPANSION VALVE COIL...
Page 318 Wiring Diagrams SiBE04-808_B RXS50G2V1B, ARXS50G2V1B X12A MRM20 3.15A POWER SUPPLY MRM10 6(P) + + + 7(N) X11A TO INDOOR UNIT 3.15A PCB1 SHEET METAL 1 S51 S101 indoor FIELD WIRING t° t° t° S102 PCB2 (OUTDOOR) (DISCHARGE) LED A (CONDENSER) outdoor Z1C~Z5C : FERRITE CORE...
Page 319 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.

Daikin G-Series Service Manual

Part 1 List of Functions

Part 2 Specifications

Part 3 Printed Circuit Board Connector Wiring Diagram

Part 4 Function and Control

Part 5 Operation Manual

Part 6 Service Diagnosis

Part 7 Removal Procedure

Part 8 Trial Operation and Field Settings

Part 9 Appendix

Quick Links

Troubleshooting

Related Manuals for Daikin G-Series

Summary of Contents for Daikin G-Series