Daikin C-Series Service Manual
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Daikin C-Series Service Manual

Inverter pair duct connected type c-series
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See also: Technical Manual , Operating Manual
Inverter Pair
Duct Connected Type C-Series
[Applied Models]
Inverter Pair : Cooling Only
Inverter Pair : Heat Pump
SiBE07-618_C

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Summary of Contents for Daikin C-Series

  • Page 1 SiBE07-618_C Inverter Pair Duct Connected Type C-Series [Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump...
  • Page 2 SiBE07-618_C Inverter Pair Duct Connected Type C-Series Cooling Only Indoor Unit FDKS50CVMB FDKS60CVMB Outdoor Unit RKS50E2(3)V1B RKS50F2V1B RKS50G2V1B RKS60E2(3)V1B RKS60F2(3)V1B Heat Pump Indoor Unit FDXS50CVMB FDXS60CVMB Outdoor Unit RXS50E2(3)V1B RXS50F2V1B RXS50G2V1B RXS60E2(3)V1B RXS60F2(3)V1B Table of Contents...

  • Page 3: Table Of Contents

    SiBE07-618_C 1. Introduction .....................v 1.1 Safety Cautions ..................v 1.2 Used Icons ....................ix Part 1 List of Functions ..............1 1. Functions....................2 Part 2 Specifications ..............5 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................9 Part 3 Printed Circuit Board Connector Wiring Diagram ... 12 1.
  • Page 4 SiBE07-618_C 2.1 Remote Controller ..................45 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........46 2.3 POWERFUL Operation ................48 2.4 OUTDOOR UNIT QUIET Operation............49 2.5 HOME LEAVE Operation ...............50 2.6 TIMER Operation ...................52 Part 6 Service Diagnosis............. 54 1.
  • Page 5 SiBE07-618_C 1.8 Removal of Compressor...............122 Part 8 Trial Operation and Field Settings......... 125 1. Trial Operation ..................126 2. Field Settings ..................127 2.1 When 2 Units are Installed in 1 Room..........127 2.2 Facility Setting Switch (cooling at low outdoor temperature)....128 2.3 Jumper and Switch Settings..............128 3.

  • Page 6: Introduction

    Introduction SiBE07-618_C 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 7 SiBE07-618_C Introduction Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety measures may cause a fall accident. In case of R-410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R-410A refrigerant.
  • Page 8 Introduction SiBE07-618_C 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.
  • Page 9 SiBE07-618_C Introduction 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 10: Used Icons

    Introduction SiBE07-618_C 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 11: Part 1 List Of Functions

    SiBE07-618_C Part 1 List of Functions 1. Functions....................2 List of Functions...

  • Page 12: Functions

    Functions SiBE07-618_C 1. Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — ~46 ★ –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 13 SiBE07-618_C Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — ~46 ★ –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
  • Page 14 Functions SiBE07-618_C Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air-Purifying Filter — — Function Clean –10 –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — ~46 ★ –15 Air-Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...

  • Page 15: Part 2 Specifications

    SiBE07-618_C Part 2 Specifications 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................9 Specifications...

  • Page 16: Specifications

    Specifications SiBE07-618_C 1. Specifications Cooling Only 50 Hz, 230 V Indoor Units FDKS50CVMB FDKS60CVMB Models Outdoor Units RKS50E2(3)V1B RKS60E2(3)V1B 5.0 (2.0 ~ 5.3) 6.0 (2.0 ~ 6.5) Capacity Btu/h 17,100 (6,800 ~ 18,100) 20,500 (6,800 ~ 22,200) Rated (Min. ~ Max.) kcal/h 4,300 (1,720 ~ 4,560) 5,160 (1,720 ~ 5,590)
  • Page 17 SiBE07-618_C Specifications 50 Hz, 230 V Indoor Units FDKS50CVMB FDKS60CVMB Models Outdoor Units RKS50F2V1B RKS60F2V1B 5.0 (1.7 ~ 5.3) 6.0 (1.7 ~ 6.5) Capacity Btu/h 17,100 (5,800 ~ 18,100) 20,500 (5,800 ~ 22,200) Rated (Min. ~ Max.) kcal/h 4,300 (1,460 ~ 4,560) 5,160 (1,460 ~ 5,590) Moisture Removal Running Current (Rated)
  • Page 18 Specifications SiBE07-618_C 50 Hz, 230 V Indoor Units FDKS50CVMB FDKS60CVMB Models Outdoor Units RKS50G2V1B RKS60F3V1B 5.0 (1.7 ~ 5.3) 6.0 (1.7 ~ 6.5) Capacity Btu/h 17,100 (5,800 ~ 18,100) 20,500 (5,800 ~ 22,200) Rated (Min. ~ Max.) kcal/h 4,300 (1,460 ~ 4,560) 5,160 (1,460 ~ 5,590) Moisture Removal Running Current (Rated)

  • Page 19: Heat Pump

    SiBE07-618_C Specifications Heat Pump 50 Hz, 230 V Indoor Units FDXS50CVMB FDXS60CVMB Models RXS50E2(3)V1B RXS60E2(3)V1B Outdoor Units Cooling Heating Cooling Heating 5.0 (2.0 ~ 5.3) 5.8 (2.0 ~ 6.0) 6.0 (2.0 ~ 6.5) 7.0 (2.0 ~ 8.0) Capacity Btu/h 17,100 (6,800 ~ 18,100) 19,800 (6,800 ~ 20,500) 20,500 (6,800 ~ 22,200) 23,900 (6,800 ~ 27,300)
  • Page 20 Specifications SiBE07-618_C 50 Hz, 230 V Indoor Units FDXS50CVMB FDXS60CVMB Models RXS50F2V1B RXS60F2V1B Outdoor Units Cooling Heating Cooling Heating 5.0 (1.7 ~ 5.3) 5.8 (1.7 ~ 6.0) 6.0 (1.7 ~ 6.5) 7.0 (1.7 ~ 8.0) Capacity Btu/h 17,100 (5,800 ~ 18,100) 19,800 (5,800 ~ 20,500) 20,500 (5,800 ~ 22,200) 23,900 (5,800 ~ 27,300)
  • Page 21 SiBE07-618_C Specifications 50 Hz, 230 V Indoor Units FDXS50CVMB FDXS60CVMB Models RXS50G2V1B RXS60F3V1B Outdoor Units Cooling Heating Cooling Heating 5.0 (1.7 ~ 5.3) 5.8 (1.7 ~ 6.0) 6.0 (1.7 ~ 6.5) 7.0 (1.7 ~ 8.0) Capacity Btu/h 17,100 (5,800 ~ 18,100) 19,800 (5,800 ~ 20,500) 20,500 (5,800 ~ 22,200) 23,900 (5,800 ~ 27,300)

  • Page 22: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE07-618_C Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........13 1.1 Indoor Unit....................13 1.2 Outdoor Unit ...................15 Printed Circuit Board Connector Wiring Diagram...

  • Page 23: Printed Circuit Board Connector Wiring Diagram

    SiBE07-618_C 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 AC fan motor 2) S7 Connector for AC fan motor (Hall IC) 3) S21 Connector for centralized control (HA) 4) S26 Connector for display PCB...
  • Page 24 Printed Circuit Board Connector Wiring Diagram SiBE07-618_C PCB Detail PCB (1): Control PCB LED A 2P131149-1 PCB (2): Display PCB LED3 LED2 RTH1 LED1 2P084375-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 25: Outdoor Unit

    SiBE07-618_C Printed Circuit Board Connector Wiring Diagram Outdoor Unit 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 26 Printed Circuit Board Connector Wiring Diagram SiBE07-618_C PCB Detail PCB (1): Main PCB AC1 E1 (3.15A) (30A) S101 2P169046-1 (3.15A) 2P169046-5 2P169046-7 PCB (2): Service Monitor PCB LED A SW4-B SW4-C S102 3P169059-1 Printed Circuit Board Connector Wiring Diagram...

  • Page 27: Part 4 Function And Control

    SiBE07-618_C Part 4 Function and Control 1. Main Functions..................18 1.1 Temperature Control ................18 1.2 Frequency Principle................18 1.3 Fan Speed Control for Indoor Units............20 1.4 Program Dry Operation ................21 1.5 Automatic Operation................22 1.6 Thermostat Control.................23 1.7 NIGHT SET Mode ..................24 1.8 HOME LEAVE Operation ...............25 1.9 Inverter POWERFUL Operation .............26 1.10 Other Functions..................27 2.

  • Page 28: Main Functions

    Main Functions SiBE07-618_C 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 29 SiBE07-618_C 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 30: Fan Speed Control For Indoor Units

    Main Functions SiBE07-618_C 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 31: Program Dry Operation

    SiBE07-618_C 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 32: Automatic Operation

    Main Functions SiBE07-618_C 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 33: Thermostat Control

    SiBE07-618_C 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 34: Night Set Mode

    Main Functions SiBE07-618_C 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 35: Home Leave Operation

    SiBE07-618_C Main Functions HOME LEAVE Operation Outline HOME LEAVE operation is a function that allows you to record your favorite set temperature and airflow rate. You can start your favorite operation mode simply by pressing the [HOME LEAVE] button on the remote controller. Detail 1.

  • Page 36: Inverter Powerful Operation

    Main Functions SiBE07-618_C 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 37: Other Functions

    SiBE07-618_C Main Functions 1.10 Other Functions 1.10.1 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 38: Function Of Thermistor

    Function of Thermistor SiBE07-618_C 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 39: Control Specification

    SiBE07-618_C 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 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 40: Frequency Control

    Control Specification SiBE07-618_C 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 41 SiBE07-618_C Control Specification 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 42: Controls At Mode Changing / Start-Up

    Control Specification SiBE07-618_C Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline The inverter operation in open phase starts with the conditions of the outdoor temperature, the discharge pipe temperature, and the radiation fin temperature (internal temperature of PM1). Outdoor temperature ≥...

  • Page 43: Discharge Pipe Temperature Control

    SiBE07-618_C Control Specification 3.3.4 3-minute Standby Turning on the compressor is prohibited for 3 minutes after turning it off. (Except when defrosting.) 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency is set as follows. (The function is not activated when defrosting.) (Hz) Frequency...

  • Page 44: Input Current Control

    Control Specification SiBE07-618_C 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 45: Freeze-Up Protection Control

    SiBE07-618_C Control Specification Freeze-up Protection Control Outline During cooling operation, the signal sent from the indoor unit controls the operating frequency limitation and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into zones.) Detail The operating frequency limitation is judged with the indoor heat exchanger temperature.

  • Page 46: Outdoor Fan Control

    Control Specification SiBE07-618_C 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 47: Defrost Control

    SiBE07-618_C Control Specification 3.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish. Detail Conditions for Starting Defrost The starting conditions is determined with the outdoor temperature and the outdoor heat exchanger temperature.

  • Page 48: Electronic Expansion Valve Control

    Control Specification SiBE07-618_C 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 49 SiBE07-618_C Control Specification 3.11.1 Fully Closing with Power ON The electronic expansion valve is initialized when turning on the power. The opening position is set and the pressure equalization is developed. 3.11.2 Pressure Equalization Control When the compressor is stopped, the pressure equalization control is activated. The electronic expansion valve opens, and develops the pressure equalization.
  • Page 50 Control Specification SiBE07-618_C 3.11.6 Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensation temperature. If the discharge pipe thermistor is disconnected, the electronic expansion valve opens according to the outdoor temperature and the operation frequency, and operates for a specified time, and then stops.

  • Page 51: Malfunctions

    SiBE07-618_C Control Specification 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction may occur in the thermistor. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Outdoor temperature thermistor Relating to CT Malfunction When the output frequency is more than Hz and the input current is below A, it is judged...

  • Page 52: Forced Operation Mode

    Control Specification SiBE07-618_C 3.13 Forced 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 operation is allowed when the above both conditions are met.

  • Page 53: Part 5 Operation Manual

    SiBE07-618_C Part 5 Operation Manual 1. System Configuration................44 2. Operation Manual..................45 2.1 Remote Controller ..................45 2.2 AUTO · DRY · COOL · HEAT · FAN Operation ........46 2.3 POWERFUL Operation ................48 2.4 OUTDOOR UNIT QUIET Operation............49 2.5 HOME LEAVE Operation ...............50 2.6 TIMER Operation ...................52 Operation Manual...

  • Page 54: System Configuration

    System Configuration SiBE07-618_C 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 55: Operation Manual

    SiBE07-618_C Operation Manual 2. Operation Manual Remote Controller Remote Controller < ARC433B69, B76 > 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. (AUTO/DRY/COOL/HEAT/FAN) (page 10.) 2. Display: •...

  • Page 56: Auto · Dry · Cool · Heat · Fan Operation

    Operation Manual SiBE07-618_C 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 57: To Change The Air Flow Rate Setting

    SiBE07-618_C Operation Manual To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ”...

  • Page 58: Powerful Operation

    Operation Manual SiBE07-618_C 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 20 minutes. Then the system automatically operates again with the settings which were used before POWERFUL operation.

  • Page 59: Outdoor Unit Quiet Operation

    SiBE07-618_C 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 night. To start OUTDOOR UNIT QUIET operation 1.

  • Page 60: Home Leave Operation

    Operation Manual SiBE07-618_C HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. To start HOME LEAVE operation 1. Press “HOME LEAVE button”. • “ ”...
  • Page 61 SiBE07-618_C Operation Manual What’s the HOME LEAVE operation? Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and air flow rate.

  • Page 62: Timer Operation

    Operation Manual SiBE07-618_C 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 63: To Use On Timer Operation

    SiBE07-618_C Operation Manual 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 64: Part 6 Service Diagnosis

    SiBE07-618_C Part 6 Service Diagnosis 1. Caution for Diagnosis................55 1.1 Troubleshooting with LED ..............55 2. Problem Symptoms and Measures ............56 3. Service Check Function ................57 4. Troubleshooting ..................60 4.1 Error Codes and Description ..............60 4.2 Indoor Unit PCB Abnormality ..............61 4.3 Freeze-up Protection Control or Heating Peak-cut Control....62 4.4 Fan Motor (AC motor) or Related Abnormality........64 4.5 Thermistor or Related Abnormality (Indoor Unit)........65...

  • Page 65: Caution For Diagnosis

    SiBE07-618_C Caution for Diagnosis 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 unit or the outdoor unit is activated, or when the thermistor malfunctions.

  • Page 66: Problem Symptoms And Measures

    Problem Symptoms and Measures SiBE07-618_C 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 67: Service Check Function

    SiBE07-618_C Service Check Function 3. Service Check Function 1. When the timer cancel button is held down for 5 seconds, “ 00 ” indication appears on the Check Method 1 temperature display section. CANCEL TIMER CANCEL button TIMER < ARC433 Series > (R11506) 2.
  • Page 68 Service Check Function SiBE07-618_C 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 69 SiBE07-618_C 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 70: Troubleshooting

    Troubleshooting SiBE07-618_C 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 71: Indoor Unit Pcb Abnormality

    SiBE07-618_C 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 Causes Defective indoor unit PCB Disconnection of connector...

  • Page 72: Freeze-Up Protection Control Or Heating Peak-Cut Control

    Troubleshooting SiBE07-618_C 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 73 SiBE07-618_C 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.96 Is there any short circuit? Provide sufficient air passage. Check the air filter.

  • Page 74: Fan Motor (Ac Motor) Or Related Abnormality

    Troubleshooting SiBE07-618_C Fan Motor (AC motor) or Related Abnormality Remote Controller Display Method of The rotation speed is detected by the Hall IC while the fan motor is operating. The rotation speed determines the error. 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 75: Thermistor Or Related Abnormality (Indoor Unit)

    SiBE07-618_C 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 76: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    Troubleshooting SiBE07-618_C Signal Transmission Error (between Indoor Unit and Outdoor Unit) Remote Controller Display Method of The data received from the outdoor unit 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 77: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiBE07-618_C 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 78: Outdoor Unit Pcb Abnormality

    Troubleshooting SiBE07-618_C Outdoor Unit PCB Abnormality 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...

  • Page 79: Ol Activation (Compressor Overload)

    SiBE07-618_C 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 80: Compressor Lock

    Troubleshooting SiBE07-618_C 4.10 Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection Malfunction Judging from the current waveform generated when high-frequency voltage is applied to the compressor.

  • Page 81: Dc Fan Lock

    SiBE07-618_C 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 30 seconds even when the fan motor is running. If the error repeats 16 times, the system is shut down.

  • Page 82: Input Overcurrent Detection

    Troubleshooting SiBE07-618_C 4.12 Input Overcurrent Detection Remote Controller Display Method of An input overcurrent is detected by checking the input current value being detected by CT with Malfunction the compressor running. Detection Malfunction The following CT input with the compressor running continues for 2.5 seconds. CT input : Above 20 A Decision Conditions...

  • Page 83: Four Way Valve Abnormality

    SiBE07-618_C Troubleshooting 4.13 Four Way Valve Abnormality Remote Controller Display Method of The room temperature thermistor, the indoor heat exchanger thermistor, the outdoor Malfunction temperature thermistor, and the outdoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode. Detection Malfunction A following condition continues over 1 minute after operating for 10 minutes.
  • Page 84 Troubleshooting SiBE07-618_C Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.05 Refer to P.95 Four way valve coil Correct it. disconnected (loose)? Check No.06 Refer to P.96 Harness out of connector? Reconnect it.

  • Page 85: Discharge Pipe Temperature Control

    SiBE07-618_C 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 °C, the compressor stops.

  • Page 86: High Pressure Control In Cooling

    Troubleshooting SiBE07-618_C 4.15 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (operation half, frequency drop, etc.) is activated in cooling mode if the Malfunction temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection Malfunction The temperature sensed by the outdoor heat exchanger thermistor rises above about 60°C.

  • Page 87: Compressor System Sensor Abnormality

    SiBE07-618_C Troubleshooting 4.16 Compressor System Sensor Abnormality 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.

  • Page 88: Position Sensor Abnormality

    Troubleshooting SiBE07-618_C 4.17 Position Sensor Abnormality Remote Controller Display Method of A compressor start-up failure is detected by checking the compressor running condition through Malfunction the position detection circuit. Detection Malfunction If the error repeats 8 times, the system is shut down. Reset condition: Continuous run for about 5 minutes without any other error Decision Conditions...
  • Page 89 SiBE07-618_C Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power. Check the power supply voltage. Voltage as rated? Correct the power supply. Check the connection. Electrical components or compressor harnesses...

  • Page 90: Ct Or Related Abnormality

    Troubleshooting SiBE07-618_C 4.18 CT or Related Abnormality 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 Hz, and the CT input current is below Decision Conditions...
  • Page 91 SiBE07-618_C Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.12 Turn off the power and turn it on Refer to P.99 again. Start operation. ∗ Running current as shown at Replace the outdoor unit right with relay cable 1...

  • Page 92: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting SiBE07-618_C 4.19 Thermistor or Related Abnormality (Outdoor Unit) H9 , J3 , J6 , P4 Remote Controller Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. Malfunction A thermistor error is detected by checking 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 93 SiBE07-618_C Troubleshooting In case of “ H9 ” “ J3 ” “ J6 ” Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.06 Refer to P.96 Turn on the power again. Error displayed Reconnect the connectors again on remote...

  • Page 94: Electrical Box Temperature Rise

    Troubleshooting SiBE07-618_C 4.20 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 °C.
  • Page 95 SiBE07-618_C Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.07 WARNING Turn off the power and turn it on Refer to P.97 again. To cool the electrical components, the outdoor fan starts when the radiation fin temperature rises above...

  • Page 96: Radiation Fin Temperature Rise

    Troubleshooting SiBE07-618_C 4.21 Radiation Fin Temperature Rise Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin temperature with the Malfunction compressor on. Detection Malfunction The radiation fin temperature with the compressor on is above °C.
  • Page 97 SiBE07-618_C Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn off the power and turn it on Check No.07 again to start the system. Refer to P.97 Check No.09 Refer to P.98 Error displayed again?

  • Page 98: Output Overcurrent Detection

    Troubleshooting SiBE07-618_C 4.22 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 99 SiBE07-618_C Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. ∗ An output overcurrent signal may result from wrong internal wiring. If the wires have been Check No.07 disconnected and reconnected and the system is interrupted by an output overcurrent, take the following procedure.

  • Page 100: Refrigerant Shortage

    Troubleshooting SiBE07-618_C 4.23 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 output 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 101 SiBE07-618_C 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.94 Any thermistor Replace them in position. disconnected? * Discharge pipe thermistor * Indoor or outdoor heat exchanger thermistor * Room temperature thermistor Check No.06 * Outdoor temperature thermistor...

  • Page 102: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting SiBE07-618_C 4.24 Low-voltage Detection or Over-voltage Detection Remote Controller Display Method of Low-voltage detection: Malfunction An abnormal voltage drop is detected by the DC voltage detection circuit. Detection Over-voltage detection: An abnormal voltage rise is detected by the over-voltage detection circuit. Malfunction Low-voltage detection: Decision...

  • Page 103: Signal Transmission Error (On Outdoor Unit Pcb)

    SiBE07-618_C Troubleshooting 4.25 Signal Transmission Error (on Outdoor Unit PCB) 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 seconds.

  • Page 104: Check

    Check SiBE07-618_C 5. Check How to Check 5.1.1 Electronic Expansion Valve Check Check No.04 Conduct the followings to check the electronic expansion valve (EV). 1. Check to see if the EV connector is correctly connected to the PCB. 2. Turn the power off and on again, and check to see if the EV generate latching sound. 3.

  • Page 105: Four Way Valve Performance Check

    SiBE07-618_C Check 5.1.2 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 106: Thermistor Resistance Check

    Check SiBE07-618_C 5.1.3 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 107: Installation Condition Check

    SiBE07-618_C Check 5.1.4 Installation Condition Check Check No.07 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged Change the installation air short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty? exchanger.

  • Page 108: Outdoor Fan System Check

    Check SiBE07-618_C 5.1.6 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? Outdoor fan system is functioning. Go to Check No. 15. (R7159) 5.1.7 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between No.1 and No.2 on the terminal board, and check the waveform disturbance.

  • Page 109: Capacitor Voltage Check

    SiBE07-618_C Check 5.1.9 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 110: Hall Ic Check

    Check SiBE07-618_C 5.1.11 Rotation Pulse Input on the Outdoor Unit PCB Check Check No.15 <Outdoor fan motor> Make sure that the voltage of 320 ± 30 V is applied. 1. Set operation off and power off. Disconnect the connector S70. 2.

  • Page 111: Part 7 Removal Procedure

    SiBE07-618_C Part 7 Removal Procedure 1. Outdoor Unit..................102 1.1 Removal of Outer Panels ..............102 1.2 Removal of Outdoor Fan / Fan Motor...........106 1.3 Removal of Electrical Box ..............110 1.4 Removal of PCB...................115 1.5 Removal of Sound Blanket / Thermistors..........118 1.6 Removal of Four Way Valve..............120 1.7 Removal of Electronic Expansion Valve..........121 1.8 Removal of Compressor...............122 Removal Procedure...

  • Page 112: Outdoor Unit

    Outdoor Unit SiBE07-618_C 1. Outdoor Unit Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the panels. Remove the 4 screws Top panel and lift the top panel.
  • Page 113 SiBE07-618_C Outdoor Unit 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 114 Outdoor Unit SiBE07-618_C Step Procedure Points Unfasten the left side Lift the front panel while hooks, and then the pushing the left side panel right side hook. inwards. Remove the front panel. Lift the front panel and unfasten the right side hook. When reassembling, fit the right side of the front panel first.
  • Page 115 SiBE07-618_C Outdoor Unit 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 116: Removal Of Outdoor Fan / Fan Motor

    Outdoor Unit SiBE07-618_C 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. Remove the top panel and Shield plate the front panel according to...
  • Page 117 SiBE07-618_C Outdoor Unit 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 118 Outdoor Unit SiBE07-618_C Step Procedure Points Remove the washer- The screw has reverse fitted nut of the outdoor winding. fan. Nut size: M6 10 mm (R12236) Outdoor fan (R5262) When reassembling, align mark of the outdoor fan with D-cut section of the motor shaft.
  • Page 119 SiBE07-618_C Outdoor Unit 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 120: Removal Of Electrical Box

    Outdoor Unit SiBE07-618_C 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 Shield...
  • Page 121 SiBE07-618_C Outdoor Unit Step Procedure Points Disconnect the 2 earth wires. Earth wires (R5269) Remove the 3 screws of the right side panel. Right side panel (R5270) Remove the screw of the electrical box. Removal Procedure...
  • Page 122 Outdoor Unit SiBE07-618_C Step Procedure Points Unfasten the hooks and When reassembling, insert remove the right side the 2 hooks of the lower part panel. and the 1 hook of the upper Hook back. (R5272) Hooks (R5273) Disconnect the connectors of the front [S40] [S20] [S80] [S90]...
  • Page 123 SiBE07-618_C Outdoor Unit 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. (R12316) Removal Procedure...
  • Page 124 Outdoor Unit SiBE07-618_C 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 125: Removal Of Pcb

    SiBE07-618_C Outdoor Unit Removal of PCB Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the Preparation [S102] connectors from the [S52] Remove the electrical box service monitor PCB according to the “Removal of [S52] [S102].
  • Page 126 Outdoor Unit SiBE07-618_C 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 127 SiBE07-618_C Outdoor Unit Step Procedure Points Remove the 3 screws of the main PCB. Main PCB (R5287) Unfasten the 4 hooks. Hooks (R5288) Lift up and remove the Refer to page 16 for detail. main PCB. Main PCB (R5289) Removal Procedure...

  • Page 128: Removal Of Sound Blanket / Thermistors

    Outdoor Unit SiBE07-618_C 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 Since the piping ports are Sound blanket...
  • Page 129 SiBE07-618_C Outdoor Unit 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. Clip (R12287) Discharge pipe thermistor...

  • Page 130: Removal Of Four Way Valve

    Outdoor Unit SiBE07-618_C 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. Be careful not to get yourself Four way valve...

  • Page 131: Removal Of Electronic Expansion Valve

    SiBE07-618_C Outdoor Unit 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 putty.

  • Page 132: Removal Of Compressor

    Outdoor Unit SiBE07-618_C 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 133 SiBE07-618_C Outdoor Unit 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 134 Outdoor Unit SiBE07-618_C 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 135: Part 8 Trial Operation And Field Settings

    SiBE07-618_C Part 8 Trial Operation and Field Settings 1. Trial Operation ..................126 2. Field Settings ..................127 2.1 When 2 Units are Installed in 1 Room..........127 2.2 Facility Setting Switch (cooling at low outdoor temperature)....128 2.3 Jumper and Switch Settings..............128 3. Application of Silicon Grease to a Power Transistor and a Diode Bridge ..................129 Trial Operation and Field Settings...

  • Page 136: Trial Operation

    Trial Operation SiBE07-618_C 1. 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 flap movement, are working properly.

  • Page 137: Field Settings

    SiBE07-618_C Field Settings 2. 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 addresses. Both the indoor unit PCB and the wireless remote controller need alteration.

  • Page 138: Facility Setting Switch (Cooling At Low Outdoor Temperature)

    Field Settings SiBE07-618_C Facility Setting 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 turning on the switch (SW4-B) on the service monitor PCB.

  • Page 139: Application Of Silicon Grease To A Power Transistor And A Diode Bridge

    SiBE07-618_C Application of Silicon Grease to a Power Transistor and a Diode Bridge 3. 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 140: Part 9 Appendix

    SiBE07-618_C Part 9 Appendix 1. Piping Diagrams..................131 1.1 Indoor Unit....................131 1.2 Outdoor Unit ..................132 2. Wiring Diagrams..................133 2.1 Indoor Unit....................133 2.2 Outdoor Unit ..................134 Appendix...

  • Page 141: Piping Diagrams

    SiBE07-618_C Piping Diagrams 1. Piping Diagrams Indoor Unit FDKS50/60CVMB, FDXS50/60CVMB INDOOR UNIT ( 6.4CuT ) HEAT EXCHANGER THERMISTOR ON HEAT FIELD PIPING ( 6.4CuT ) EXCH. SIROCCO FAN FAN MOTOR FIELD PIPING CuT ) CuT ) REFRIGERANT FLOW COOLING HEATING FDXS50CVMB FDXS60CVMB 12.7...

  • Page 142: Outdoor Unit

    Piping Diagrams SiBE07-618_C Outdoor Unit 1.2.1 Cooling Only RKS50/60E2(3)V1B, RKS50/60F2V1B, RKS50G2V1B, RKS60F3V1B OUTDOOR UNIT HEAT EXCHANGER 7.9CuT OUTDOOR AIR TEMPERATURE THERMISTOR 7.9CuT 7.9CuT 7.9CuT 12.7CuT 7.9CuT CAPILLARY TUBE 1 7.9CuT 4.0CuT 7.9CuT MUFFLER WITH 7.9CuT 4.0CuT 7.9CuT REFRIGERANT FLOW FILTER CAPILLARY TUBE 2 6.4CuT 7.9CuT...

  • Page 143: Wiring Diagrams

    SiBE07-618_C Wiring Diagrams 2. Wiring Diagrams Indoor Unit FDKS50/60CVMB, FDXS50/60CVMB PCB1 PCB2 V1TR outdoor 3.15A FIELD WIRING. TERMINAL FOR CAUTION TRANSMISSION CENTRALIZED CONTROL NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK SIGNAL ON AGAIN.

  • Page 144: Outdoor Unit

    Wiring Diagrams SiBE07-618_C Outdoor Unit 2.2.1 Cooling Only RKS50F2V1B, RKS50G2V1B X12A MRM20 3.15A POWER SUPPLY MRM10 6(P) + + + 7(N) X11A TO INDOOR UNIT 3.15A PCB1 SHEET METAL S101 indoor FIELD WIRING t° t° t° 1 S102 PCB2 (OUTDOOR) (DISCHARGE) LED A (CONDENSER) outdoor...
  • Page 145 SiBE07-618_C Wiring Diagrams RKS60F3V1B MRM20 POWER SUPPLY 3.15A MRM10 6(P) 7(N) TO INDOOR UNIT X11A 3.15A MRC W PCB1 SHEET METAL S101 indoor FIELD WIRING t˚ t˚ t˚ S102 PCB2 (OUTDOOR) (DISCHARGE) LED A (CONDENSER) outdoor Z1C~Z6C : FERRITE CORE X1M, X2M : TERMINAL STRIP MRM10, MRM20...
  • Page 146 Wiring Diagrams SiBE07-618_C RXS50/60E2(3)V1B, RXS60F2V1B MRM20 3.15A POWER SUPPLY MRM10 6(P) + + + 7(N) X11A TO INDOOR UNIT 3.15A PCB1 SHEET METAL S101 indoor FIELD WIRING t° t° t° S102 PCB2 (OUTDOOR) (DISCHARGE) LED A (CONDENSER) outdoor Z1C ~ Z4C : FERRITE CORE X1M, X2M MRM10, MRM20...
  • Page 147 Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the Warning world. Daikin Industries, Ltd. does not have control over which products are exported to and used in a particular country. Prior to purchase, please therefore confirm with your local authorised importer, distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for use, in the region where the product will be used.

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