Page 1 SiBE041012_A Service Manual Inverter Pair Wall Mounted Type J-Series [Applied Models] Inverter Pair : Heat Pump...
Page 2 SiBE041012_A Inverter Pair Wall Mounted Type J-Series Heat Pump Indoor Unit FTXG25JV1BW FTXG25JV1BS FTXG35JV1BW FTXG35JV1BS FTXG50JV1BW FTXG50JV1BS Outdoor Unit RXG25J2V1B RXG25K2V1B RXG35J2V1B RXG35K2V1B RXG50K2V1B Table of Contents...
Page 3: Table Of Contents
SiBE041012_A 1. Introduction .................... vi 1.1 Safety Cautions ..................vi 1.2 Used Icons ....................x Part 1 List of Functions ..............1 1. Functions....................2 Part 2 Specifications ..............4 1. Specifications ..................5 Part 3 Printed Circuit Board Connector Wiring Diagram ... 10 1.
Page 4 SiBE041012_A 2. Operation Manual..................50 2.1 Name of Parts ..................50 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........54 2.3 Adjusting the Airflow Direction and Rate ..........56 2.4 COMFORT AIRFLOW Operation ............58 2.5 INTELLIGENT EYE Operation ...............59 2.6 POWERFUL Operation ................61 2.7 OUTDOOR UNIT QUIET Operation............62 2.8 ECONO Operation .................63 2.9 OFF TIMER Operation ................64...
Page 5 SiBE041012_A 5.4 Electronic Expansion Valve Coil Check ..........125 5.5 Four Way Valve Performance Check ...........126 5.6 Inverter Unit Refrigerant System Check..........126 5.7 “Inverter Checker” Check ..............127 5.8 Rotation Pulse Check on the Outdoor Unit PCB ........129 5.9 Installation Condition Check..............130 5.10 Discharge Pressure Check..............130 5.11 Outdoor Fan System Check ..............131 5.12 Main Circuit Short Check..............131...
Page 6 SiBE041012_A 4.2 Standby Electricity Saving..............223 4.3 Jumper and Switch Settings..............223 5. Application of Silicon Grease to a Power Transistor and a Diode Bridge ................224 Part 9 Appendix................. 225 1. Piping Diagrams..................226 1.1 Indoor Unit....................226 1.2 Outdoor Unit ..................226 2. Wiring Diagrams..................228 2.1 Indoor Unit....................228 2.2 Outdoor Unit ..................228 Table of Contents...
Page 7: Introduction
SiBE041012_A 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 SiBE041012_A 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 SiBE041012_A 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 SiBE041012_A 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
SiBE041012_A 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
SiBE041012_A Part 1 List of Functions 1. Functions....................2 List of Functions...
Page 13: Functions
SiBE041012_A Functions 1. Functions Category Functions Category Functions Basic Function Inverter (with Inverter Power Control) Health & Clean Air-Purifying Filter — –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — ~ 46 –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 14 Functions SiBE041012_A Category Functions Category Functions Basic Function Inverter (with Inverter Power Control) Health & Clean Air-Purifying Filter — — Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — ~ 46 ~ 46 –15 –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 15: Part 2 Specifications
SiBE041012_A Part 2 Specifications 1. Specifications ..................5 Specifications...
Page 16: Specifications
Specifications SiBE041012_A 1. Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG25JV1BW FTXG25JV1BS Models RXG25J2V1B RXG25J2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5)
Page 17 SiBE041012_A Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG35JV1BW FTXG35JV1BS Models RXG35J2V1B RXG35J2V1B Outdoor Unit Cooling Heating Cooling Heating 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) Capacity Btu/h 11,900 (4,800 ~ 13,000) 13,600 (4800 ~ 17,100)
Page 18 Specifications SiBE041012_A 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG25JV1BW FTXG25JV1BS Models RXG25K2V1B RXG25K2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) 2.5 (1.3 ~ 3.0) 3.4 (1.3 ~ 4.5) Capacity...
Page 19 SiBE041012_A Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG35JV1BW FTXG35JV1BS Models RXG35K2V1B RXG35K2V1B Outdoor Unit Cooling Heating Cooling Heating 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) 3.5 (1.4 ~ 3.8) 4.0 (1.4 ~ 5.0) Capacity Btu/h 11,900 (4,800 ~ 13,000) 13,600 (4800 ~ 17,100)
Page 20 Specifications SiBE041012_A 50 Hz, 220 - 230 - 240 V Indoor Unit FTXG50JV1BW FTXG50JV1BS Models RXG50K2V1B RXG50K2V1B Outdoor Unit Cooling Heating Cooling Heating 5.0 (1.7 ~ 5.3) 5.8 (1.7 ~ 6.5) 5.0 (1.7 ~ 5.3) 5.8 (1.7 ~ 6.5) Capacity Btu/h 17,100 (5,800 ~ 18,100) 19,800 (5,800 ~ 22,200)
Page 21: Part 3 Printed Circuit Board Connector Wiring Diagram
SiBE041012_A Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit.....................11 2. Outdoor Unit..................14 2.1 RXG25/35J2V1B, RXG25/35K2V1B ............14 2.2 RXG50K2V1B ..................16 Printed Circuit Board Connector Wiring Diagram...
Page 22: Indoor Unit
Indoor Unit SiBE041012_A 1. Indoor Unit Connectors and PCB (1): Control PCB Other Parts 1) S21 Connector for centralized control (HA) 2) S25 Connector for INTELLIGENT EYE sensor PCB 3) S32 Connector for indoor heat exchanger thermistor 4) S41 Connector for swing motors 5) S42 Connector for reduction motor (front panel mechanism) and limit switch 6) S46...
Page 23 SiBE041012_A Indoor Unit PCB Detail PCB (1): Control PCB JB JC LED A S200 2P254830-1 Printed Circuit Board Connector Wiring Diagram...
Page 24 Indoor Unit SiBE041012_A PCB (2): Signal Receiver / Display PCB 3P254832-1 PCB (3): INTELLIGENT EYE Sensor PCB 3P255914-1 Printed Circuit Board Connector Wiring Diagram...
Page 25: Outdoor Unit
SiBE041012_A Outdoor Unit 2. Outdoor Unit RXG25/35J2V1B, RXG25/35K2V1B Connectors and PCB(1): Filter PCB Other Parts 1) S11 Connector for main PCB 2) AC1, AC2, S Connector for terminal board 3) E1, E2 Terminal for earth 4) HL2, HN2 Connector for main PCB 5) HR1 Connector for reactor 6) FU1...
Page 26 Outdoor Unit SiBE041012_A PCB Detail PCB(1): Filter PCB E1, E2 (on main PCB) 3P254234-1 PCB(2): Main PCB U VW LED A S100 S50 2P254206-4 2P254206-9 PCB(3): Forced Cooling Operation Switch PCB S110 3P255755-1 Printed Circuit Board Connector Wiring Diagram...
Page 27: Rxg50K2V1B
SiBE041012_A Outdoor Unit RXG50K2V1B Connectors and PCB (1): Main PCB Other Parts 1) S10 Connector for terminal board (indoor - outdoor transmission) 2) S20 Connector for electronic expansion valve coil 3) S40 Connector for overload protector 4) S51, S101 Connector for service monitor PCB 5) S70 Connector for fan motor 6) S80...
Page 28 Outdoor Unit SiBE041012_A PCB Detail PCB (1): Main PCB S101 2P282217-1 PCB (2): Service Monitor PCB LED A SW4-C S102 3P169059-1 Printed Circuit Board Connector Wiring Diagram...
Page 29: Part 4 Function And Control
SiBE041012_A Part 4 Function and Control 1. Main Functions..................19 1.1 Temperature Control ................19 1.2 Frequency Principle................19 1.3 Operation Starting Control..............21 1.4 Airflow Direction Control.................22 1.5 Fan Speed Control for Indoor Unit ............23 1.6 Program Dry Operation ................24 1.7 Automatic Operation................25 1.8 Thermostat Control.................26 1.9 NIGHT SET Mode ..................27 1.10 ECONO Operation .................28...
Page 30: Main Functions
Main Functions SiBE041012_A 1. Main Functions Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures Room temperature: temperature of lower part of the room Set temperature: temperature set by remote controller Room thermistor temperature: temperature detected by room temperature thermistor Target temperature: temperature determined by microcomputer Target temperature Room thermistor temperature...
Page 31 SiBE041012_A Main Functions Drawing of The following drawing shows a schematic view of the inverter principle: Inverter Refrigerant circulation rate (high) high speed Amount of heat Amount of heat exchanged air (large) exchanged air (large) high f low f Amount of heat Amount of heat exchanged air (small) exchanged air (small)
Page 32: Operation Starting Control
Main Functions SiBE041012_A Operation Starting Control The system carries out the following control at the beginning to conduct every functional parts properly. 1. Opening the front panel fully 2. Output of the ∆D signal after the front panel starts moving 3.
Page 33: Airflow Direction Control
SiBE041012_A Main Functions Airflow Direction Control Power-Airflow The large flap sends a large volume of air downwards to the floor. The flap provides an optimum control in cooling, dry, and heating mode. 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 distributed all over the room.
Page 34: Fan Speed Control For Indoor Unit
Main Functions SiBE041012_A Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature.
Page 35: Program Dry Operation
SiBE041012_A 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 36: Automatic Operation
Main Functions SiBE041012_A 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 37: Thermostat Control
SiBE041012_A 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 38: Night Set Mode
Main Functions SiBE041012_A 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 39: Econo Operation
SiBE041012_A Main Functions 1.10 ECONO Operation The "ECONO operation" reduces the maximum operating current and the power consumption. This operation is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.
Page 40: Intelligent Eye Operation
Main Functions SiBE041012_A 1.11 INTELLIGENT EYE Operation Outline This is the function that detects existence of humans in the room by a human motion sensor (INTELLIGENT EYE) and reduces the capacity when there is nobody in the room in order to save electricity.
Page 41: Inverter Powerful Operation
SiBE041012_A Main Functions 1.12 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 42 Main Functions SiBE041012_A Brightness The brightness of the multi-colored indicator lamp can be adjusted L (low), H (high), or OFF. Setting 1. Press the center of the Temp button and the Mode button at the same time. (R11669) is displayed on the LCD. (R11911) 2.
Page 43: Other Functions
SiBE041012_A Main Functions 1.13 Other Functions 1.13.1 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 44: Function Of Thermistor
Function of Thermistor SiBE041012_A 2. Function of Thermistor Electronic expansion valve Four way valve Compressor (R14247) (1) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge pipe temperature. The system sets the target discharge pipe temperature according to the Exchanger outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve Thermistor...
Page 45: Control Specification
SiBE041012_A Control Specification 3. Control Specification Mode Hierarchy Outline There are two modes; the one is the normal operation mode and the other is the forced operation mode for installation and servicing. Detail Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode Normal operation mode...
Page 46: Frequency Control
Control Specification SiBE041012_A 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 47 SiBE041012_A Control Specification Indoor Frequency Command (∆D signal) The difference between the room thermistor temperature and the target temperature is taken as the “∆D signal” and is used for frequency command. ∆D ∆D ∆D ∆D Temperature Temperature Temperature Temperature difference signal difference signal...
Page 48: Controls At Mode Changing / Start-Up
Control Specification SiBE041012_A 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 25/35 Class Outdoor temperature ≥...
Page 49: Compressor Protection Function
SiBE041012_A Control Specification 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 50: Discharge Pipe Temperature Control
Control Specification SiBE041012_A 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 51: Input Current Control
SiBE041012_A Control Specification Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit from the input current. In case of heat pump model, this control which is the upper limit control of the frequency takes priority to the lower limit of control of four way valve operation compensation.
Page 52: Freeze-Up Protection Control
Control Specification SiBE041012_A Freeze-up Protection Control Outline During cooling operation, the signal sent from the indoor unit controls the operating frequency limitation and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into zones.) Detail The operating frequency limitation is judged with the indoor heat exchanger temperature.
Page 53: Outdoor Fan Control
SiBE041012_A Control Specification Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF control while defrosting The outdoor fan is turned OFF while defrosting.
Page 54: Defrost Control
Control Specification SiBE041012_A 3.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish. Detail Conditions for Starting Defrost The starting conditions is determined with the outdoor temperature and the outdoor heat exchanger temperature.
Page 55: Outdoor Electronic Expansion Valve Control
SiBE041012_A Control Specification 3.11 Outdoor Electronic Expansion Valve Control Outline The following items are included in the outdoor electronic expansion valve control. Outdoor electronic expansion valve is fully closed. 1. Outdoor electronic expansion valve is fully closed when turning on the power. 2.
Page 56: Pressure Equalizing Control
Control Specification SiBE041012_A 3.11.1 Fully Closing with Power ON The outdoor 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 Equalizing Control When the compressor is stopped, the pressure equalization control is activated. The outdoor electronic expansion valve opens, and develops the pressure equalization.
Page 57 SiBE041012_A Control Specification 3.11.7 Control for Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature. If the discharge pipe thermistor is disconnected, the outdoor electronic expansion valve opens according to the outdoor temperature and the operation frequency, and operates for a specified time, and then stops.
Page 58: Malfunctions
Control Specification SiBE041012_A 3.12 Malfunctions 3.12.1 Detection of Overcurrent and Overload Outline An excessive output current is detected and, the OL temperature is observed to protect the compressor. Detail If the OL (compressor head) temperature exceeds 120 ~ 130°C, the system shuts down the compressor.
Page 59: Part 5 Operation Manual
SiBE041012_A Part 5 Operation Manual 1. System Configuration................49 2. Operation Manual..................50 2.1 Name of Parts ..................50 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........54 2.3 Adjusting the Airflow Direction and Rate ..........56 2.4 COMFORT AIRFLOW Operation ............58 2.5 INTELLIGENT EYE Operation ...............59 2.6 POWERFUL Operation ................61 2.7 OUTDOOR UNIT QUIET Operation............62...
Page 60: System Configuration
System Configuration SiBE041012_A 1. System Configuration After installation and trial operation of the room air conditioner are completed, the air conditioner should be handled and operated as described in the following pages. Every user should be informed on the correct method of operation and how to check if it can cool (or heat) well, and how to use it efficiently.
Page 61: Operation Manual
SiBE041012_A Operation Manual 2. Operation Manual Name of Parts Name of Parts Indoor Unit Air inlet INTELLIGENT EYE sensor • Appearance of the indoor unit may differ. • It detects the movements of people and automatically switches between normal operation and energy saving operation.
Page 62 Operation Manual SiBE041012_A Open the front panel Panel support plate Air filter Titanium apatite photocatalytic air-purifying filter Outdoor Unit • Appearance of the outdoor unit may differ from some models. Outdoor temperature Air inlet (back and side) sensor (back) Drain hose Earth terminal •...
Page 63: Remote Controller
SiBE041012_A Operation Manual Name of Parts Remote Controller Signal transmitter Receiver 50cm or more Display (LCD) • It displays the current settings. • To use the remote controller, aim the (In this illustration, each section is transmitter at the indoor unit. If there shown with its displays on for the is anything to block signals between purpose of explanation.)
Page 64 Operation Manual SiBE041012_A Open the front cover MODE selector button • It selects the operation mode. (AUTO/DRY/COOL/HEAT/ FAN) Page 11 ECONO button • ECONO operation. Page 20 SWING button • Adjusting the airflow direction. Page 13 QUIET button • OUTDOOR UNIT QUIET operation.
Page 65: Auto · Dry · Cool · Heat · Fan Operation
SiBE041012_A Operation Manual AUTO · DRY · COOL · HEAT · FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode. To start operation Press and select an operation mode.
Page 66: Operating Conditions
Operation Manual SiBE041012_A To change the temperature setting Press • The displayed items on the LCD will change whenever either one of the buttons is pressed. COOL operation HEAT operation AUTO operation DRY or FAN operation 18-32˚C 10-30˚C 18-30˚C The temperature setting is Press to raise the temperature and press to lower the...
Page 67: Adjusting The Airflow Direction And Rate
SiBE041012_A Operation Manual Adjusting the Airflow Direction and Rate Adjusting the Airflow Direction and Rate You can adjust the airflow direction to increase your comfort. To start auto swing Upper and lower airflow direction Press • “ ” is displayed on the LCD. •...
Page 68 Operation Manual SiBE041012_A To adjust the airflow rate setting Press • Each pressing of advances the airflow rate setting in sequence. Auto Indoor unit quiet Middle low High Middle high Middle • When the airflow is set to “ ”, indoor unit quiet operation will start and the noise from the unit will become quieter.
Page 69: Comfort Airflow Operation
SiBE041012_A Operation Manual COMFORT AIRFLOW Operation COMFORT AIRFLOW Operation The flow of air will be in the upward direction while in COOL operation and in the downward direction while in HEAT operation, which will provide a comfortable wind that will not come in direct contact with people. To start COMFORT AIRFLOW operation Press •...
Page 70: Intelligent Eye Operation
Operation Manual SiBE041012_A INTELLIGENT EYE Operation INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. If nobody in the room for more than 20 minutes, the operation automatically changes to energy saving operation. To start INTELLIGENT EYE operation Press •...
Page 71 SiBE041012_A Operation Manual INTELLIGENT EYE Operation [Example] Someone is back in the When someone is in the When no one is in the room room room 20 minutes after, start energy saving operation. Back to normal operation. Normal operation • The air conditioner is in normal •...
Page 72: Powerful Operation
Operation Manual SiBE041012_A 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 Press during operation. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the previous settings which were used before POWERFUL operation.
Page 73: Outdoor Unit Quiet Operation
SiBE041012_A Operation Manual 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 the night. To start OUTDOOR UNIT QUIET operation Press •...
Page 74: Econo Operation
Operation Manual SiBE041012_A ECONO Operation ECONO Operation ECONO operation is a function which enables efficient operation by limiting the maximum power consumption value. This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances. To start ECONO operation Press during operation.
Page 75: Off Timer Operation
SiBE041012_A Operation Manual OFF TIMER Operation OFF TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...
Page 76: On Timer Operation
Operation Manual SiBE041012_A 2.10 ON TIMER Operation ON TIMER Operation To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. Press • “ ” is displayed on the LCD. •...
Page 77: Weekly Timer Operation
SiBE041012_A Operation Manual 2.11 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 Example: The same timer settings are made for the week from Monday through Friday while different timer settings are made for the weekend.
Page 78 Operation Manual SiBE041012_A 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...
Page 79 SiBE041012_A Operation Manual WEEKLY TIMER Operation Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10 minute intervals. • To return to the ON/OFF TIMER mode setting, press • Go to step when setting the OFF TIMER.
Page 80 Operation Manual SiBE041012_A Copy mode • A reservation made once can be copied to 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...
Page 81 SiBE041012_A Operation Manual WEEKLY TIMER Operation Confirming a reservation • The reservation can be confirmed. Setting Displays Normal Confirmation Press • The day of the week and the reservation number of the current day will be displayed. Press to select the day of the week and the reservation number to be confirmed.
Page 82 Operation Manual SiBE041012_A To delete reservations The individual reservation Press • The day of the week and the reservation number will be displayed. Press to select the day of the week and the reservation number to be deleted. Press • “ ”...
Page 83: Part 6 Service Diagnosis
SiBE041012_A Part 6 Service Diagnosis 1. Troubleshooting with LED ..............74 1.1 Indoor Unit....................74 1.2 Outdoor Unit ...................74 2. Problem Symptoms and Measures ............75 3. Service Check Function ................76 4. Troubleshooting ..................79 4.1 Error Codes and Description ..............79 4.2 Indoor Unit PCB Abnormality ..............80 4.3 Freeze-up Protection Control or Heating Peak-cut Control....82 4.4 Fan Motor (DC Motor) or Related Abnormality........84 4.5 Thermistor or Related Abnormality (Indoor Unit)........86...
Page 84 SiBE041012_A 5.12 Main Circuit Short Check..............131 5.13 Capacitor Voltage Check..............132 5.14 Power Module Check ................132 Service Diagnosis...
Page 85: Troubleshooting With Led
SiBE041012_A Troubleshooting with LED 1. Troubleshooting with LED Indoor Unit Multi-Colored The multi-colored indicator 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 Indicator Lamp malfunctions.
Page 86: Problem Symptoms And Measures
Problem Symptoms and Measures SiBE041012_A 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page The unit does not operate. Check the power supply. Check if the rated voltage is supplied. — Check the type of the indoor unit. Check if the indoor unit type is compatible with —...
Page 87: Service Check Function
SiBE041012_A Service Check Function 3. Service Check Function 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature Check Method 1 display screen. Timer cancel button (R14553) < ARC466 Series > 2. Press the timer cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below.
Page 88 Service Check Function SiBE041012_A Check Method 2 1. Press the center of the Temp button and the Mode button at the same time. (R11669) is displayed on the LCD. (R11821) 2. Select 5C (service check) with the Temp button. 3. Press the Mode button to enter the service check mode. (R11672) The left-side number blinks.
Page 89 SiBE041012_A Service Check Function 5. Diagnose by the sound. beep : The left-side number does not correspond with the error code. two consecutive beeps : The left-side number corresponds with the error code but the right-side number does not. long beep : Both the left-side and right-side numbers correspond with the error code. (The numbers indicated when you hear the long beep are the error code.
Page 90: Troubleshooting
Troubleshooting SiBE041012_A 4. Troubleshooting Error Codes and Description Reference Error Codes Description Page System Normal — Refrigerant shortage Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Unspecified voltage (between indoor unit and outdoor unit) Indoor Indoor unit PCB abnormality Unit...
Page 91: Indoor Unit Pcb Abnormality
SiBE041012_A Troubleshooting Indoor Unit PCB Abnormality Remote Controller Display Method of The system checks if the circuit works properly within the microcomputer of the indoor unit. Malfunction Detection Malfunction The system cannot set the internal settings. Decision Conditions Supposed Wrong models interconnected Causes Defective indoor unit PCB Disconnection of connector...
Page 92 Troubleshooting SiBE041012_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the combination of the indoor and outdoor unit. Match the compatible models. ∗ To secure the connection, Check the connection of once disconnect the connector connectors (See Note.).
Page 93: Freeze-Up Protection Control Or Heating Peak-Cut Control
SiBE041012_A Troubleshooting Freeze-up Protection Control or Heating Peak-cut Control Remote Controller Display Method of Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated Malfunction according to the temperature detected by the indoor heat exchanger thermistor. Detection Heating peak-cut control During heating operation, the temperature detected by the indoor heat exchanger thermistor...
Page 94 Troubleshooting SiBE041012_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Check the air passage. Refer to P.123 Is there any short circuit? Provide sufficient air passage. Check the air filter.
Page 95: Fan Motor (Dc Motor) Or Related Abnormality
SiBE041012_A Troubleshooting Fan Motor (DC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction The detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.
Page 96 Troubleshooting SiBE041012_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.02 Turn off the power supply Refer to P.124 and rotate the fan by hand. Does the fan Replace the indoor rotate smoothly? fan motor.
Page 97: Thermistor Or Related Abnormality (Indoor Unit)
SiBE041012_A Troubleshooting Thermistor or Related Abnormality (Indoor Unit) C4 , C9 Remote Controller Display Method of The temperatures detected by the thermistors determine thermistor errors. Malfunction Detection Malfunction The thermistor input is more than 4.96 V or less than 0.04 V during compressor operation. Decision Conditions Supposed...
Page 98: Front Panel Open / Close Fault
Troubleshooting SiBE041012_A Front Panel Open / Close Fault Remote Controller Display Method of Malfunction Detection Malfunction If the error repeats, the system is shut down. Decision Conditions Supposed Defective reduction motor Causes Malfunction or deterioration of the front panel mechanism Defective limit switch Troubleshooting Be sure to turn off the power switch before connecting or disconnecting...
Page 99: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)
SiBE041012_A 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 100 Troubleshooting SiBE041012_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.11 Check the power supply voltage. Refer to P.124 Voltage as rated? Correct the power supply. Check the indoor unit - outdoor unit connection wires.
Page 101: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)
SiBE041012_A Troubleshooting Unspecified Voltage (between Indoor Unit and Outdoor Unit) Remote Controller Display Method of The supply power is detected for its requirements (different from pair type and multi type) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction The pair type and multi type are interconnected.
Page 102: Outdoor Unit Pcb Abnormality
Troubleshooting SiBE041012_A Outdoor Unit PCB Abnormality 4.9.1 25/35 Class Remote Controller Display Method of The system follows the microprocessor program as specified. Malfunction The system checks to see if the zero-cross signal comes in properly. Detection Malfunction The microprocessor program runs out of control. The zero-cross signal is not detected.
Page 103 SiBE041012_A Troubleshooting 4.9.2 50 Class Remote Controller Display Method of Detection within the program of the microcomputer Malfunction Detection Malfunction The program of the microcomputer is in abnormal running order. Decision Conditions Supposed Defective outdoor unit PCB Noise Causes Momentary fall of voltage Momentary power failure Troubleshooting Be sure to turn off the power switch before connecting or disconnecting...
Page 104: Ol Activation (Compressor Overload)
Troubleshooting SiBE041012_A 4.10 OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the error repeats, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error Decision ∗...
Page 105: Compressor Lock
SiBE041012_A Troubleshooting 4.11 Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection Malfunction <25/35 class> Operation stops due to overcurrent. Decision If the error repeats, the system is shut down. Conditions Reset condition: Continuous run for about 11 minutes without any other error <50 class>...
Page 106: Dc Fan Lock
Troubleshooting SiBE041012_A 4.12 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 ~ 30 seconds (depending on the model) even when the fan motor is running.
Page 107: Input Overcurrent Detection
SiBE041012_A Troubleshooting 4.13 Input Overcurrent Detection Remote Controller Display Method of An input overcurrent is detected by checking the input current value with the compressor Malfunction running. Detection Malfunction The current exceeds about 9.25 ~ 20 A (depending on the model) for 2.5 seconds with the compressor running.
Page 108: Four Way Valve Abnormality
Troubleshooting SiBE041012_A 4.14 Four Way Valve Abnormality Remote Controller Display Method of The room temperature thermistor, the indoor heat exchanger thermistor, the outdoor Malfunction temperature thermistor, and the outdoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode. Detection Malfunction A following condition continues over 1 ~ 10 minutes (depending on the model) after operating...
Page 109 SiBE041012_A Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Four way valve coil Correct it. Refer to P.123 disconnected (loose)? Check No.13 Harness out of connector? Refer to P.126 Reconnect it.
Page 110: Discharge Pipe Temperature Control
Troubleshooting SiBE041012_A 4.15 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 111: High Pressure Control In Cooling
SiBE041012_A Troubleshooting 4.16 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if Malfunction the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection Malfunction The temperature sensed by the outdoor heat exchanger thermistor rises above about 65°C.
Page 112: Compressor System Sensor Abnormality
Troubleshooting SiBE041012_A 4.17 Compressor System Sensor Abnormality 4.17.1 25/35 Class Remote Controller Display Method of The system checks the DC current before the compressor starts. Malfunction Detection Malfunction The DC current before compressor start-up is out of the range 0.5 ~ 4.5 V (sensor output converted to voltage value) Decision The DC voltage before compressor start-up is below 50 V.
Page 113 SiBE041012_A Troubleshooting 4.17.2 50 Class Remote Controller Display Method of The system checks the supply voltage and the DC voltage before the compressor starts. The system checks the compressor current right after the compressor starts. Malfunction Detection Malfunction The supply voltage and the DC voltage is obviously low or high. Decision The compressor current does not run when the compressor starts.
Page 114: Position Sensor Abnormality
Troubleshooting SiBE041012_A 4.18 Position Sensor Abnormality Remote Controller Display Method of A compressor start-up failure is detected by checking the compressor running condition through Malfunction the position detection circuit. Detection Malfunction If the error repeats, the system is shut down. Reset condition: Continuous run for about 11 minutes (50 class: 5 minutes) without any Decision other error...
Page 115 SiBE041012_A Troubleshooting Troubleshooting 25/35 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Refer to P.127 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.130 Voltage as rated? Correct the power supply.
Page 116 Troubleshooting SiBE041012_A Troubleshooting 50 class Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Refer to P.127 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.130 Voltage as rated? Correct the power supply.
Page 117: Dc Voltage / Current Sensor Abnormality (25/35 Class)
SiBE041012_A Troubleshooting 4.19 DC Voltage / Current Sensor Abnormality (25/35 Class) Remote Controller Display Method of DC voltage or DC current sensor abnormality is identified based on the compressor running Malfunction frequency and the input current. Detection Malfunction The compressor running frequency is above 52 Hz. If the error repeats, the system is shut down.
Page 118: Ct Or Related Abnormality (50 Class)
Troubleshooting SiBE041012_A 4.20 CT or Related Abnormality (50 Class) Remote Controller Display Method of A CT or related error is detected by checking the compressor running frequency and CT- Malfunction detected input current. Detection Malfunction The compressor running frequency is more than 55 Hz, and the CT input current is below 0.5 A.
Page 119 SiBE041012_A Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Turn off the power and turn it on Refer to P.127 again. Check No.21 Start operation. Refer to P.132 ∗...
Page 120: Thermistor Or Related Abnormality (Outdoor Unit)
Troubleshooting SiBE041012_A 4.21 Thermistor or Related Abnormality (Outdoor Unit) H9 , J3 , J6 , P4 Remote Controller Display Method of This fault is identified based on the thermistor input voltage to the microcomputer. Malfunction A thermistor fault is identified based on the temperature sensed by each thermistor. Detection Malfunction The thermistor input voltage is above 4.96 V or below 0.04 V with the power on.
Page 121 SiBE041012_A Troubleshooting In case of “ H9 ” “ J3 ” “ J6 ” Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn on the power again. Refer to P.123 Error displayed Reconnect the connectors...
Page 122: Electrical Box Temperature Rise
Troubleshooting SiBE041012_A 4.22 Electrical Box Temperature Rise Remote Controller Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor off. Detection Malfunction With the compressor off, the radiation fin temperature is above A °C. The error is cleared when the radiation fin temperature drops below B °C.
Page 123 SiBE041012_A Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 WARNING Turn off the power and turn it on again. To cool the electrical components, Refer to P.130 the outdoor fan starts when the radiation fin temperature rises above C ˚C and stops when it...
Page 124: Radiation Fin Temperature Rise
Troubleshooting SiBE041012_A 4.23 Radiation Fin Temperature Rise Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor on. Detection Malfunction If the radiation fin temperature with the compressor on is above A °C. The error is cleared when the radiation fin temperature drops below B °C.
Page 125 SiBE041012_A Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.17 Turn off the power and turn it on Refer to P.130 again to start the system. Check No.19 Refer to P.131 Error displayed again?
Page 126: Output Overcurrent Detection
Troubleshooting SiBE041012_A 4.24 Output Overcurrent Detection Remote Controller Display Method of An output overcurrent is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. A speed error occurs while the compressor is running.
Page 127 SiBE041012_A Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement, check the Refer to P.127 wiring again.
Page 128: Refrigerant Shortage
Troubleshooting SiBE041012_A 4.25 Refrigerant Shortage Remote Controller Display Method of Refrigerant shortage detection I: Malfunction Refrigerant shortage is detected by checking the input current value and the compressor running frequency. If the refrigerant is short, the input current is lower than the normal value. Detection Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of...
Page 129 SiBE041012_A Troubleshooting Refrigerant shortage detection III : (25/35 class only) When the difference of the temperature is lower than K °C, it is regarded as refrigerant shortage. K (°C) room thermistor temperature – indoor heat exchanger temperature Cooling outdoor heat exchanger temperature – outdoor temperature indoor heat exchanger temperature –...
Page 130 Troubleshooting SiBE041012_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.123 Any thermistor Replace them in position. disconnected? ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor ∗...
Page 131: Low-Voltage Detection Or Over-Voltage Detection
SiBE041012_A Troubleshooting 4.26 Low-voltage Detection or Over-voltage Detection Remote Controller Display Method of Indoor Unit Malfunction Evaluation of zero-cross detection of power supply by the indoor unit PCB. Detection Outdoor Unit Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit.
Page 132 Troubleshooting SiBE041012_A Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Voltage as rated? Correct the power supply. Check the connection of the compressor harness. Loose or Reconnect it.
Page 133: Signal Transmission Error On Outdoor Unit Pcb (50 Class Only)
SiBE041012_A Troubleshooting 4.27 Signal Transmission Error on Outdoor Unit PCB (50 Class Only) Remote Controller Display Method of Communication error between microcomputer mounted on the main microcomputer and PM1. Malfunction Detection Malfunction The abnormality is determined when the data sent from the PM1 can not be received for 9 Decision seconds.
Page 134: Check
Check SiBE041012_A 5. Check Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the table and the graph below.
Page 135: Fan Motor Connector Check
SiBE041012_A Check Fan Motor Connector Check Check No.02 1. Check the connection of connector. 2. Check the motor power supply voltage output (pins 4 - 7). 3. Check the motor control voltage (pins 4 - 3). 4. Check the rotation command voltage (pins 4 - 2). 5.
Page 136: Electronic Expansion Valve Coil Check
Check SiBE041012_A Electronic Expansion Valve Coil Check Check No.12 Conduct the followings to check the electronic expansion valve coil (EV). 1. Check to see if the EV connector is correctly connected to the PCB. 2. Turn the power off and on again, and check to see if the EV generate latching sound. 3.
Page 137: Four Way Valve Performance Check
SiBE041012_A Check Four Way Valve Performance Check Check No.13 Turn off the power and turn it on again. ∗ Four way valve coil Start heating operation. Cooling / Dry : No continuity Heating : Continuity voltage at 220 - 240 Replace the outdoor unit VAC with compressor PCB.
Page 138: Inverter Checker" Check
Check SiBE041012_A “Inverter Checker” Check Check No.15 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 139 SiBE041012_A Check Diagnose method (Diagnose according to 6 LEDs lighting status.) (1) When all the LEDs are lit uniformly, the compressor is defective. → Replace the compressor. (2) When the LEDs are not lit uniformly, check the power module. → Refer to Check No.22.
Page 140: Rotation Pulse Check On The Outdoor Unit Pcb
Check SiBE041012_A Rotation Pulse Check on the Outdoor Unit PCB Check No.16 25/35 class 1. Check that the voltage between the pins 10 - 11 is 15 VDC. 2. Check if the Hall IC generates the rotation pulse (0 ~ 15 VDC) 4 times between the pins 10 - 12, 10 - 13, when the fan motor is manually rotated once.
Page 141: Installation Condition Check
SiBE041012_A Check Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty? exchanger.
Page 142: Outdoor Fan System Check
Check SiBE041012_A 5.11 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system. Fan motor lead wire connector Outdoor fan running? Reconnect the connector. disconnected? Go to Check No. 16. Outdoor fan system is functioning. (R15281) 5.12 Main Circuit Short Check Check No.20 Note: Check to make sure that the voltage between (+) and (–) of the diode bridge (DB1) is approx.
Page 143: Capacitor Voltage Check
SiBE041012_A Check 5.13 Capacitor Voltage Check Check No.21 Before this check, be sure to check the main circuit for short circuit. With the circuit breaker still on, measure the voltage according to the drawing of the model in question. Be careful never to touch any live parts. Multimeter (DC voltage range) (R13538)
Page 144: Part 7 Removal Procedure
SiBE041012_A Part 7 Removal Procedure 1. Indoor Unit...................134 1.1 Removal of Air Filters / Front Panel .............134 1.2 Removal of Horizontal Blades ..............138 1.3 Removal of Front Grille ................140 1.4 Removal of Front Panel Mechanism ASSY..........143 1.5 Removal of Display Lens ASSY ............145 1.6 Removal of Reduction Motor / Limit Switch..........146 1.7 Removal of Fan Guards / Electrical Box ..........148 1.8 Removal of PCBs .................151...
Page 145: Indoor Unit
SiBE041012_A Indoor Unit 1. Indoor Unit Removal of Air Filters / Front Panel Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Appearance feature (R12067) INTELLIGENT EYE sensor Multi-colored indicator lamp /...
Page 146 Indoor Unit SiBE041012_A Step Procedure Points Lift the air filter upwards slightly, and then pull it out downwards. Air filter (R12071) The air filter is not marked for difference between the right and left sides. The air filter can be set easily by inserting it along the guides.
Page 147 SiBE041012_A Indoor Unit Step Procedure Points Release the protrusions and remove the Titanium apatite photocatalytic air- purifying filter frame. (R15282) Remove the Titanium apatite photocatalytic air-purifying filter. (R12074) 4. Remove the front panel. Open the front panel at least 90 degrees. (R12075) Removal Procedure...
Page 148 Indoor Unit SiBE041012_A Step Procedure Points Release the front panel Front panel lock Right locks on each side. (R12076) Left (R12077) Remove the front panel. (R12078) Removal Procedure...
Page 149: Removal Of Horizontal Blades
SiBE041012_A Indoor Unit Removal of Horizontal Blades Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the horizontal blade (large). Bend the horizontal blade (large) slightly and release the center shaft.
Page 150 Indoor Unit SiBE041012_A Step Procedure Points 2. Remove the horizontal blade (small). Bend the horizontal blade (small) slightly and release the center shaft. Horizontal blades (small) (R12082) Release the left shaft. (R12083) Slide the horizontal blade (small) to the left and release the right shaft.
Page 151: Removal Of Front Grille
SiBE041012_A Indoor Unit Removal of Front Grille Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 screws Decoration panel of the decoration panel (right).
Page 152 Indoor Unit SiBE041012_A Step Procedure Points Disconnect the relay Relay connector connector for the reduction motor. (R12088) Open the 2 screw covers with a flat screwdriver. Screw cover (R12089) Remove the 2 screws. (R12090) Removal Procedure...
Page 153 SiBE041012_A Indoor Unit Step Procedure Points Remove the screw. (R12091) Remove the screw. (R12164) Unfasten the 3 hooks on the top of the front grille. Front grille (R12092) Remove the front grille. (R12093) Removal Procedure...
Page 154: Removal Of Front Panel Mechanism Assy
Indoor Unit SiBE041012_A Removal of Front Panel Mechanism ASSY 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 of the front grille (right). (R12094) Remove the guide Guide panel...
Page 155 SiBE041012_A Indoor Unit Step Procedure Points Remove the shaft holder and the cover shaft. Shaft holder Cover shaft (R12097) Remove the shaft. (R12098) Removal Procedure...
Page 156: Removal Of Display Lens Assy
Indoor Unit SiBE041012_A Removal of Display Lens ASSY 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 display lens ASSY by turning it counterclockwise. Display lens ASSY (R12102) Unfasten the hook and...
Page 157: Removal Of Reduction Motor / Limit Switch
SiBE041012_A Indoor Unit Removal of Reduction Motor / Limit Switch Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Cut the clamp of the front panel mechanism ASSY (right).
Page 158 Indoor Unit SiBE041012_A Step Procedure Points Remove the screw of the reduction motor. Reduction motor (R12107) Remove the reduction motor by turning it counterclockwise. (R12108) Remove the limit switch. Limit switch (R12109) Removal Procedure...
Page 159: Removal Of Fan Guards / Electrical Box
SiBE041012_A Indoor Unit Removal of Fan Guards / Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the fan guards. Use the a sharp tool such as an awl to unfasten the lower Unfasten the 2 hooks hooks.
Page 160 Indoor Unit SiBE041012_A Step Procedure Points Remove the screws and release the connecting wires. Connecting wire (R12113) Remove the shield Shield plate plate. (R12114) Disconnect the [S41] connectors for the swing motors [S41] and for the fan motor [S200] [S200]. (R12115) Removal Procedure...
Page 161 SiBE041012_A Indoor Unit Step Procedure Points Release the harnesses. (R12116) Remove the screw. (R12117) Unfasten the 2 hooks There are 2 hooks on the Electrical box and remove the bottom frame. When electrical box. reassembling, fit the rear side of the electrical box to the hooks.
Page 162: Removal Of Pcbs
Indoor Unit SiBE041012_A Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Unfasten the 4 hooks Lamp cover ASSY and remove the lamp cover ASSY from the electrical box.
Page 163 SiBE041012_A Indoor Unit Step Procedure Points Disconnect the [S51] connectors for the control PCB [S51] and for the room temperature thermistor [S52]. [S52] (R12122) Refer to page 13 for detail. [S51]: control PCB [S52]: room temperature [S52] thermistor [S51] (R12123) Cut the clamp.
Page 164 Indoor Unit SiBE041012_A Step Procedure Points Release the harness from the hook. (R12125) Unfasten the 3 hooks of Sensor ASSY the sensor ASSY with a flat screwdriver. (R12126) Remove the sensor INTELLIGENT ASSY. EYE sensor PCB (R12127) Disconnect the connector [S36] from the INTELLIGENT EYE sensor PCB.
Page 165 SiBE041012_A Indoor Unit Step Procedure Points Cut the clamp. (R12129) Remove the shield plate. Shield plate (R12130) Remove the screw of the terminal board. Terminal board (R12131) Removal Procedure...
Page 166 Indoor Unit SiBE041012_A Step Procedure Points Pull out the terminals and remove the terminal board. (R12132) Release the harnesses from the groove. (R12133) Release the harnesses of the signal receiver / display PCB. (R12134) Unfasten the 3 hooks. (R12135) Removal Procedure...
Page 167 SiBE041012_A Indoor Unit Step Procedure Points Unfasten the other 2 Control PCB hooks and remove the control PCB. (R12136) Refer to page 12 for detail. [S46] [S21] [S21]: HA connector [S25] [S25]: INTELLIGENT EYE sensor PCB [S32]: indoor heat exchanger thermistor [S42] [S41]: swing motors...
Page 168: Removal Of Swing Motors
Indoor Unit SiBE041012_A Removal of Swing Motors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 screws Connector color of the swing motor. Upper blade: white Lower blade: red Swing motor...
Page 169: Removal Of Indoor Heat Exchanger
SiBE041012_A Indoor Unit 1.10 Removal of Indoor Heat Exchanger Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Disconnect the refrigerant piping. Caution In pump-down work, be sure Remove the screws to stop the compressor fixed to the installation...
Page 170 Indoor Unit SiBE041012_A Step Procedure Points 3. Remove the indoor heat Piping fixture exchanger. Unfasten the hook of the piping fixture at the back of the indoor unit and pull out the pipe. (R12143) Widen the auxiliary pipe by about 10 ~ 20 Caution degrees.
Page 171 SiBE041012_A Indoor Unit Step Procedure Points Remove the indoor heat Indoor heat exchanger. exchanger (R12147) Removal Procedure...
Page 172: Removal Of Fan Rotor / Fan Motor
Indoor Unit SiBE041012_A 1.11 Removal of Fan Rotor / Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side panel. Remove the screw.
Page 173 SiBE041012_A Indoor Unit Step Procedure Points Remove the fan motor Fan motor fixing plate fixing plate. (R12151) Remove the fan rotor. Fan rotor (R12152) Remove the bearing. Bearing (R12153) Removal Procedure...
Page 174 Indoor Unit SiBE041012_A Step Procedure Points 3. Remove the fan motor. When reassembling the fan motor and the fan rotor, Remove the screw and provide as much as 5 mm of remove the fan motor. play between the side face Fan rotor Fan motor of the rotor and the bottom...
Page 175: Removal Of Vertical Blade Assys
SiBE041012_A Indoor Unit 1.12 Removal of Vertical Blade ASSYs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Unfasten the 3 hooks at A vertical blade ASSY has 6 the shaft mounting part fins.
Page 176: Outdoor Unit - 25/35 Class
Outdoor Unit - 25/35 Class SiBE041012_A 2. Outdoor Unit - 25/35 Class 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 177 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points Remove the 2 screws Top panel and lift the top panel. (R7190) Remove the drip proof Drip proof plate plate. (R7191) Remove the 4 screws and remove the discharge grille. Discharge grille (R7192) The discharge grille has 4...
Page 178 Outdoor Unit - 25/35 Class SiBE041012_A Step Procedure Points Remove the 8 screws of the front panel. (R11825) Front panel Unfasten the hooks. The front panel has 4 hooks. Pull and remove the front panel. Hook (R11826) Removal Procedure...
Page 179 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points 3. Remove the fan motor. Nut size: M6 Remove the nut of the outdoor fan. 10 mm (R12236) Outdoor fan (R14205) Remove the outdoor When reassembling, align fan. mark of the outdoor fan with D-cut section of the motor shaft.
Page 180 Outdoor Unit - 25/35 Class SiBE041012_A Step Procedure Points Cut the clamp. (R11830) Disconnect the connector for the fan motor [S70]. (R11831) [S70] Release the fan motor Fan motor lead wire from the hook. lead wire (R11832) Removal Procedure...
Page 181 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points Remove the screw and remove the fan motor fixing frame. Fan motor fixing frame (R11833) (R12314) When reassembling, fit the lower hooks into the bottom frame. (R7206) Removal Procedure...
Page 182 Outdoor Unit - 25/35 Class SiBE041012_A Step Procedure Points Open the hooks and When reassembling, put the release the fan motor fan motor lead wire through lead wire. the back of the fan motor so as not to be entangled with the outdoor fan.
Page 183 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points Remove the 4 screws Right side panel on the right side panel. (R12163) Remove the screw near the stop valves. (R11839) Unfasten the hook on When reassembling, make the rear side. sure to fit the hook.
Page 184 Outdoor Unit - 25/35 Class SiBE041012_A Step Procedure Points Lift up the right side When reassembling, make panel and remove it. sure to fit the hook. Hook (R12272) Lift up the guard net Guard net and remove it. (R11841) Removal Procedure...
Page 185: Removal Of Electrical Box
SiBE041012_A Outdoor Unit - 25/35 Class Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the Preparation connector for the Remove the panels and overload protector disconnect the connector for [S40].
Page 186 Outdoor Unit - 25/35 Class SiBE041012_A Step Procedure Points Disconnect the relay connector for the compressor. (R11845) Disconnect the connector for the electronic expansion valve coil [S20]. [S20] (R11847) Cut the clamp. (R11850) Pull out the outdoor Be careful not to lose the clip heat exchanger for the thermistor.
Page 187 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points Release the discharge Be careful not to lose the clip pipe thermistor. for the thermistor. Clip (R12279) Discharge pipe thermistor (R11849) Lift and remove the Electrical Box electrical box. (R11852) Removal Procedure...
Page 188: Removal Of Pcbs
Outdoor Unit - 25/35 Class SiBE041012_A Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the main PCB. You can remove the main PCB when you disconnect Feature of the main the lead wires on the...
Page 189 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points Pull out the forced Be careful of a sharp operation button PCB. protrusion at the back of the Disconnect the forced operation button connector [S110] to PCB. remove the forced operation button PCB. Forced operation button PCB (R11856) Disconnect the relay...
Page 190 Outdoor Unit - 25/35 Class SiBE041012_A Step Procedure Points Release the harness. (R11859) Cut the clamps at the 2 locations. (R11860) Disconnect the connector for the filter PCB [S10]. [S10] (R11861) Removal Procedure...
Page 191 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points Disconnect the connectors for the [S100] magnetic relay [S50] and for the forced operation button PCB [S100]. [S50] (R11862) Disconnect the connector for the filter [HN3] PCB [HL3] [HN3]. [HL3] (R11863) Release the harnesses from the hook.
Page 192 Outdoor Unit - 25/35 Class SiBE041012_A Step Procedure Points Remove the 6 screws. (R11866) Unfasten the 4 hooks and remove the main PCB. (R11867) Refer to page 15 for detail. [S50] [S100] [S10] [HL3] [HN3]: filter PCB [S20]: electronic expansion valve coil [HN3] [S40]: overload protector...
Page 193 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points 2. Remove the filter PCB. Release the harnesses from the hook. Filter PCB (R11869) Cut the clamp. (R11871) Release the harnesses from the hook. (R11872) Removal Procedure...
Page 194 Outdoor Unit - 25/35 Class SiBE041012_A Step Procedure Points Release the harnesses from the hooks. (R11873) Remove the screw. (R11874) Unfasten the 2 hooks. Filter PCB (R11876) Lift and pull out the filter PCB. (R11877) Removal Procedure...
Page 195 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points Feature of the filter Refer to page 15 for detail. (R11878) Removal Procedure...
Page 196: Removal Of Reactor / Partition Plate
Outdoor Unit - 25/35 Class SiBE041012_A Removal of Reactor / Partition Plate Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the reactor. Preparation Reactor Remove the outer panels Remove the screw and...
Page 197 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. (R12280) When reassembling, fit the lower hook into the bottom frame. (R11883) Removal Procedure...
Page 198: Removal Of Sound Blankets
Outdoor Unit - 25/35 Class SiBE041012_A Removal of Sound Blankets Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the sound Since the piping ports are blanket (top).
Page 199 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points Pull the sound blanket (inner) out. Sound blanket (inner) (R11887) Pull the sound blanket (bottom) out. Sound blanket (bottom) (R11888) Removal Procedure...
Page 200: Removal Of Four Way Valve
Outdoor Unit - 25/35 Class SiBE041012_A Removal of Four Way Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Pull out the electronic expansion valve coil. Electronic expansion valve coil...
Page 201 SiBE041012_A Outdoor Unit - 25/35 Class Step Procedure Points Remove the screw and Four way valve coil remove the four way Warning valve coil. Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.
Page 202 Outdoor Unit - 25/35 Class SiBE041012_A Step Procedure Points Note: Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit. When withdrawing the pipes, be careful not to pinch them firmly with pliers. The pipes may get deformed.
Page 203: Removal Of Compressor
SiBE041012_A Outdoor Unit - 25/35 Class Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the 2 nuts of the compressor. Warning Be careful not to get yourself burnt with pipes and other parts that are heated by the...
Page 204 Outdoor Unit - 25/35 Class SiBE041012_A 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 205: Outdoor Unit - 50 Class
SiBE041012_A Outdoor Unit - 50 Class 3. Outdoor Unit - 50 Class 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 206 Outdoor Unit - 50 Class SiBE041012_A Step Procedure Points The discharge grille has 4 hooks. Remove the 6 screws of the front panel. Front panel (R12284) Push the front panel and lift the shield plate Shield plate to unfasten the hooks. (1) Push the front panel.
Page 207 SiBE041012_A Outdoor Unit - 50 Class Step Procedure Points Unfasten the left side Lift the front panel while hooks, and then the pushing the left side panel right side hook. inwards. Remove the front panel. Lift the front panel and unfasten the right side hook.
Page 208 Outdoor Unit - 50 Class SiBE041012_A Step Procedure Points 2. Remove the stop valve cover. Remove the screw of the stop valve cover. Stop valve cover (R5252) Pull down the stop valve cover to unfasten the hooks and remove The stop valve cover has 6 hooks.
Page 209: Removal Of Outdoor Fan / Fan Motor
SiBE041012_A Outdoor Unit - 50 Class 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 210 Outdoor Unit - 50 Class SiBE041012_A Step Procedure Points (R5258) 2. Remove the fan motor. Disconnect the connector for the fan [S70] motor [S70]. (R5259) Release the fan motor lead wire from the 7 hooks. Fan motor lead wire (R5260) Removal Procedure...
Page 211 SiBE041012_A Outdoor Unit - 50 Class Step Procedure Points Remove the nut of the Nut size: M6 outdoor fan. 10 mm (R12236) Outdoor fan (R5262) When reassembling, align mark of the outdoor fan with D-cut section of the motor shaft. (R5263) Remove the lower 2 Be sure to remove the lower...
Page 212 Outdoor Unit - 50 Class SiBE041012_A Step Procedure Points Release the fan motor When reassembling, put the lead wire from the 2 fan motor lead wire through hooks and pull the fan the back of the fan motor so motor out. as not to be entangled with the outdoor fan.
Page 213: Removal Of Electrical Box
SiBE041012_A Outdoor Unit - 50 Class 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 Shield...
Page 214 Outdoor Unit - 50 Class SiBE041012_A Step Procedure Points Disconnect the 2 earth wires. Earth wire (R5269) Remove the 3 screws of the right side panel. Right side panel (R5270) Remove the screw of the electrical box. Removal Procedure...
Page 215 SiBE041012_A Outdoor Unit - 50 Class Step Procedure Points Unfasten the hooks and When reassembling, insert remove the right side the 2 hooks of the lower part panel. and the hook of the upper Hook back. (R5272) Hook (R5273) Disconnect the connectors of the front [S40] [S20] [S80]...
Page 216 Outdoor Unit - 50 Class SiBE041012_A Step Procedure Points Release the clamp of the compressor relay harness with pliers. Compressor relay harness (R5277) Detach the clamp and release the thermistor Clamp Hook lead wires from the hook. Thermistor lead wire (R5278) Remove the screw.
Page 217 SiBE041012_A Outdoor Unit - 50 Class Step Procedure Points Release the harness of the outdoor temperature thermistor from the hook. (R9403) Lift and remove the electrical box. Electrical box (R5279) Removal Procedure...
Page 218: Removal Of Pcbs
Outdoor Unit - 50 Class SiBE041012_A Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the Preparation [S52] [S102] connectors from the Remove the electrical box service monitor PCB according to the “Removal of...
Page 219 SiBE041012_A Outdoor Unit - 50 Class Step Procedure Points Unfasten the hook on the right. Open the terminal board. Disconnect the 1: Black harnesses. 2: White 3: Red L1: Black L2: Brown N1: White N2: Blue (R5285) Disconnect the 2 connectors for the reactor [HR1] [HR2].
Page 220 Outdoor Unit - 50 Class SiBE041012_A Step Procedure Points Remove the 3 screws of the main PCB. Main PCB (R5287) Unfasten the 4 hooks. Hook (R5288) Lift up and remove the Refer to page 17 for detail. main PCB. Main PCB (R5289) Removal Procedure...
Page 221: Removal Of Sound Blankets / Thermistors
SiBE041012_A Outdoor Unit - 50 Class Removal of Sound Blankets / Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the sound blanket (back). Sound blanket (back) Remove the sound...
Page 222 Outdoor Unit - 50 Class SiBE041012_A Step Procedure Points Remove the sound Sound blanket blanket (top lower). (top lower) (R11398) Remove the sound blanket (inner). Sound blanket (inner) (R5296) Release the discharge Be careful not to lose the clip pipe thermistor. for the thermistor.
Page 223: Removal Of Four Way Valve
SiBE041012_A Outdoor Unit - 50 Class Removal of Four Way Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the screw and remove the four way Warning valve coil.
Page 224: Removal Of Electronic Expansion Valve
Outdoor Unit - 50 Class SiBE041012_A 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 225: Removal Of Compressor
SiBE041012_A Outdoor Unit - 50 Class 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 226 Outdoor Unit - 50 Class SiBE041012_A Step Procedure Points Release the clamp with pliers to detach the compressor lead wires. Remove the putty. Before working, make sure that the refrigerant Warning gas is empty in the circuit. Be careful not to get yourself Be sure to apply nitrogen burnt with the pipes and other replacement when...
Page 227 SiBE041012_A Outdoor Unit - 50 Class Step Procedure Points Remove the 2 nuts of Cautions for restoration the compressor. 1. Restore the piping by non- oxidation brazing. 2. It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat.
Page 228: Part 8 Trial Operation And Field Settings
SiBE041012_A Part 8 Trial Operation and Field Settings 1. Pump Down Operation................218 2. Forced Cooling Operation ..............219 3. Trial Operation ..................221 4. Field Settings ..................222 4.1 When 2 Units are Installed in 1 Room..........222 4.2 Standby Electricity Saving..............223 4.3 Jumper and Switch Settings..............223 5.
Page 229: Pump Down Operation
SiBE041012_A Pump Down Operation 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing the unit. Detail 1) Remove the valve caps from the liquid stop valve and the gas stop valve. 2) Carry out forced cooling operation.
Page 230: Forced Cooling Operation
Forced Cooling Operation SiBE041012_A 2. Forced Cooling Operation Item Forced Cooling Conditions The forced cooling operation is allowed when both the following conditions are met. 1) The outdoor unit is not abnormal and not in the 3-minute standby mode. 2) The outdoor unit is not operating. Start The forced cooling operation starts when any of the following conditions is fulfilled.
Page 231 SiBE041012_A Forced Cooling Operation Outdoor Unit (50 class) S102 LED-A Forced cooling operation ON/OFF switch (R14963) Trial Operation and Field Settings...
Page 232: Trial Operation
Trial Operation SiBE041012_A 3. Trial Operation Outline 1. Measure the power supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating mode. 3. Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as flap movement, are working properly.
Page 233: Field Settings
SiBE041012_A Field Settings 4. Field Settings When 2 Units are Installed in 1 Room When 2 indoor units are installed in 1 room, 1 of the 2 pairs of indoor unit and wireless remote controller can be set for different address. Both the indoor unit PCB and the wireless remote controller need alteration.
Page 234: Standby Electricity Saving
Field Settings SiBE041012_A Standby Electricity Saving Outline 25/35 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. Detail Following procedure is required for turning ON the function. 1.
Page 235: Application Of Silicon Grease To A Power Transistor And A Diode Bridge
SiBE041012_A Application of Silicon Grease to a Power Transistor and a Diode Bridge 5. Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner. Models When the printed circuit board (PCB) of an outdoor unit is replaced, it is required that silicon grease (*1) is certainly applied to the heat radiation part (the contact point to the radiation fin) of the power transistor and diode bridge.
Page 236: Part 9 Appendix
SiBE041012_A Part 9 Appendix 1. Piping Diagrams..................226 1.1 Indoor Unit....................226 1.2 Outdoor Unit ..................226 2. Wiring Diagrams..................228 2.1 Indoor Unit....................228 2.2 Outdoor Unit ..................228 Appendix...
Page 237: Piping Diagrams
SiBE041012_A Piping Diagrams 1. Piping Diagrams Indoor Unit FTXG25/35JV1BW(S) FTXG50JV1BW(S) INDOOR UNIT INDOOR UNIT 6.4CuT 6.4CuT HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR CROSS FLOW FAN CROSS FLOW FAN ON HEAT EXCH. ON HEAT EXCH. FIELD PIPING FIELD PIPING 6.4CuT 6.4CuT FAN MOTOR FAN MOTOR FIELD PIPING...
Page 238 Piping Diagrams SiBE041012_A RXG50K2V1B OUTDOOR UNIT 7.9CuT HEAT EXCHANGER OUTDOOR AIR TEMPERATURE THERMISTOR 7.9CuT 7.9CuT 7.9CuT 12.7CuT 7.9CuT CAPILLARY TUBE 1 7.9CuT 4.0CuT MUFFLER 7.9CuT WITH 7.9CuT 4.0CuT 7.9CuT REFRIGERANT FLOW FILTER CAPILLARY TUBE 2 6.4CuT 7.9CuT COOLING CAPILLARY TUBE 3 4.0CuT HEATING HEAT...
Page 239: Wiring Diagrams
SiBE041012_A Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTXG25/35/50JV1BW(S) : FRAME GROUND : FUSE H1P, H2P : PILOT LAMP 3.15A C102 : FAN MOTOR OUTDOOR MR10 M1S, M2S : SWING MOTOR : STEPPING MOTOR C101 INTELLIGENT EYE TRANSMISSION A1P~A3P : PRINTED CIRCUIT BOARD / YLW SENSOR CIRCUIT...
Page 240 Wiring Diagrams SiBE041012_A RXG50K2V1B Z5C X12A MRM20 POWER SUPPLY 3.15A MRM10 6(P) 7(N) TO INDOOR UNIT X11A 3.15 A PCB1 MRC/W SHEET METAL S101 indoor FIELD WIRING t° t° t° S102 PCB2 LED A (OUTDOOR) (DISCHARGE) (CONDENSER) outdoor Z1C~Z5C FERRITE CORE MRM10, MRM20 LIVE COMPRESSOR MOTOR...
Page 241 Revision History Month / Year Version Revised contents 04/2010 SiBE041012 – 06/2011 SiBE041012_A Model addition: FTXG50JV1BW(S), RXG25/35/50K2V1B...
Page 242 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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