Daikin FLKS25BAVMB Service Manual
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Daikin FLKS25BAVMB Service Manual

Inverter pair floor / ceiling suspended dual type flk(x)s-ba series
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See also: Service Manual , Operating Manual
Service
Manual
Inverter Pair
Floor / Ceiling Suspended Dual Type
FLK(X)S-BA Series
SiBE05-722EE
[Applicable Models]
Inverter Pair: Cooling Only
Inverter Pair: Heat Pump

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Summary of Contents for Daikin FLKS25BAVMB

  • Page 1 SiBE05-722EE Service Manual Inverter Pair Floor / Ceiling Suspended Dual Type FLK(X)S-BA Series [Applicable Models] Inverter Pair: Cooling Only Inverter Pair: Heat Pump...
  • Page 2 SiBE05-722EE Inverter Pair Floor / Ceiling Suspended Dual Type FLK(X)S-BA Series Cooling Only Indoor Unit FLKS25BAVMB FLKS35BAVMB Outdoor Unit RKS25E2V1B RKS25G2V1B RKS35E2V1B RKS35G2V1B RKS25G2V1B9 RKS35G2V1B9 Heat Pump Indoor Unit FLXS25BAVMB FLXS35BAVMB9 FLXS35BAVMB Outdoor Unit RXS25E2V1B RXS25G2V1B RXS25J2V1B RXS25L2V1B RXS35E2V1B RXS35G2V1B...

  • Page 3: Table Of Contents

    SiBE05-722EE 1. Safety Cautions..................v 1.1 Warnings and Cautions Regarding Safety of Workers......v 1.2 Warnings and Cautions Regarding Safety of Users....... vii 2. Icons Used ..................... ix Part 1 List of Functions ..............1 1. Functions....................2 Part 2 Specifications ..............7 1.
  • Page 4 SiBE05-722EE 3.10 Defrost Control ..................50 3.11 Electronic Expansion Valve Control ............51 3.12 Malfunctions ...................54 Part 5 Remote Controller ............55 1. Remote Controller .................56 Part 6 Service Diagnosis............. 58 1. General Problem Symptoms and Check Items ........59 2. Troubleshooting with LED ..............60 2.1 Indoor Unit....................60 2.2 Outdoor Unit ...................60 3.
  • Page 5 SiBE05-722EE 5.12 Main Circuit Short Check..............110 5.13 Power Module Check ................112 Part 7 Trial Operation and Field Settings......... 115 1. Tips for Servicing ................116 1.1 Pump Down Operation .................116 1.2 Forced Cooling Operation ..............116 2. Trial Operation ..................118 3. Field Settings ..................119 3.1 When 2 Units are Installed in 1 Room..........119 3.2 Facility Setting Jumper (cooling at low outdoor temperature) ....120 3.3 Jumper and Switch Settings..............121...

  • Page 6: Safety Cautions

    Safety Cautions SiBE05-722EE 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer.
  • Page 7 SiBE05-722EE Safety Cautions Warning Do not turn the air conditioner on or off by plugging in or unplugging the power cable. Plugging in or unplugging the power cable to operate the equipment may cause an electrical shock or fire. Be sure to wear a safety helmet, gloves, and a safety belt when working in a high place (more than 2 m).

  • Page 8: Warnings And Cautions Regarding Safety Of Users

    Safety Cautions SiBE05-722EE Caution Conduct welding work in a well-ventilated place. Using a welder in an enclosed room may cause oxygen deficiency. Warnings and Cautions Regarding Safety of Users Warning Do not store the equipment in a room with fire sources (e.g., naked flames, gas appliances, electric heaters).
  • Page 9 SiBE05-722EE Safety Cautions Warning Do not mix air or gas other than the specified refrigerant (R-32 / R-410A / R-22) in the refrigerant system. If air enters the refrigerant system, an excessively high pressure results, causing equipment damage and injury. If the refrigerant gas leaks, be sure to locate the leaking point and repair it before charging the refrigerant.

  • Page 10: Icons Used

    Icons Used SiBE05-722EE Caution Check the earth / grounding, and repair it if the equipment is not properly earthed / grounded. Improper earth / grounding may cause an electrical shock. Be sure to measure insulation resistance after the repair, and make sure that the resistance is 1 MΩ...

  • Page 11: Part 1 List Of Functions

    SiBE05-722EE Part 1 List of Functions 1. Functions....................2 List of Functions...

  • Page 12: Functions

    Functions SiBE05-722EE 1. Functions Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter Functions Cleanliness –10 –10 Operation limit for cooling (°CDB) ~ 46 Photocatalytic deodorizing filter ~ 46 –15 Air-purifying filter with photocatalytic Operation limit for heating (°CWB) —...
  • Page 13 SiBE05-722EE Functions Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter Functions Cleanliness –10 –10 Operation limit for cooling (°CDB) ~ 46 ~ 46 Photocatalytic deodorizing filter –15 Air-purifying filter with photocatalytic Operation limit for heating (°CWB) —...
  • Page 14 Functions SiBE05-722EE Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter Functions Cleanliness –10 –10 Operation limit for cooling (°CDB) ~ 46 ~ 46 Photocatalytic deodorizing filter –15 Air-purifying filter with photocatalytic Operation limit for heating (°CWB) —...
  • Page 15 SiBE05-722EE Functions Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter Functions Cleanliness –10 –10 Operation limit for cooling (°CDB) ~ 46 ~ 46 Photocatalytic deodorizing filter –15 Air-purifying filter with photocatalytic – Operation limit for heating (°CWB) ~ 18 ~ 18 deodorizing function (option)
  • Page 16 Functions SiBE05-722EE Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter Functions Cleanliness –10 –10 Operation limit for cooling (°CDB) ~ 46 ~ 46 Photocatalytic deodorizing filter Air-purifying filter with photocatalytic – – Operation limit for heating (°CWB) ~ 18 ~ 18 deodorizing function (option)

  • Page 17: Part 2 Specifications

    SiBE05-722EE Part 2 Specifications 1. Specifications ..................8 1.1 Cooling Only.....................8 1.2 Heat Pump .....................11 Specifications...

  • Page 18: Specifications

    Specifications SiBE05-722EE 1. Specifications Cooling Only 50 Hz, 220 - 230 - 240 V Indoor Unit FLKS25BAVMB FLKS35BAVMB Model Outdoor Unit RKS25E2V1B RKS35E2V1B 2.5 (1.2 ~ 3.0) 3.5 (1.2 ~ 3.8) Capacity Rated (Min. ~ Max.) Btu/h 8,500 (4,100 ~ 10,200)
  • Page 19 SiBE05-722EE Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FLKS25BAVMB FLKS35BAVMB Model Outdoor Unit RKS25G2V1B RKS35G2V1B 2.5 (1.2 ~ 3.0) 3.5 (1.2 ~ 3.8) Capacity Rated (Min. ~ Max.) Btu/h 8,500 (4,100 ~ 10,200) 11,900 (4,100 ~ 13,000)
  • Page 20 Specifications SiBE05-722EE 50 Hz, 220 - 230 - 240 V Indoor Unit FLKS25BAVMB FLKS35BAVMB Model Outdoor Unit RKS25G2V1B9 RKS35G2V1B9 2.5 (1.2 ~ 3.0) 3.5 (1.2 ~ 3.8) Capacity Rated (Min. ~ Max.) Btu/h 8,500 (4,100 ~ 10,200) 11,900 (4,100 ~ 13,000)

  • Page 21: Heat Pump

    SiBE05-722EE Specifications Heat Pump 50 Hz, 220 - 230 - 240 V Indoor Unit FLXS25BAVMB FLXS35BAVMB Model RXS25E2V1B RXS35E2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.2 ~ 3.0) 3.4 (1.2 ~ 4.5) 3.5 (1.2 ~ 3.8) 4.0 (1.2 ~ 5.0) Capacity Rated (Min.
  • Page 22 Specifications SiBE05-722EE 50 Hz, 220 - 230 - 240 V Indoor Unit FLXS25BAVMB FLXS35BAVMB Model RXS25G2V1B RXS35G2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.2 ~ 3.0) 3.4 (1.2 ~ 4.5) 3.5 (1.2 ~ 3.8) 4.0 (1.2 ~ 5.0) Capacity Rated (Min. ~ Max.) Btu/h 8,500 (4,100 ~ 10,200) 11,600 (4,100 ~ 15,400)
  • Page 23 SiBE05-722EE Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FLXS25BAVMB FLXS35BAVMB Model RXS25G2V1B9 RXS35G2V1B9 Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.2 ~ 3.0) 3.4 (1.2 ~ 4.5) 3.5 (1.2 ~ 3.8) 4.0 (1.4 ~ 5.0) Capacity Rated (Min. ~ Max.) Btu/h 8,500 (4,100 ~ 10,200) 11,600 (4,100 ~ 15,400)
  • Page 24 Specifications SiBE05-722EE 50 Hz, 220 - 230 - 240 V Indoor Unit FLXS25BAVMB FLXS35BAVMB Model RXS25J2V1B RXS35J2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.2 ~ 3.0) 3.4 (1.2 ~ 4.5) 3.5 (1.2 ~ 3.8) 4.0 (1.4 ~ 5.0) Capacity Rated (Min. ~ Max.) Btu/h 8,500 (4,100 ~ 10,200) 11,600 (4,100 ~ 15,400)
  • Page 25 SiBE05-722EE Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FLXS25BAVMB FLXS35BAVMB Model RXS25K3V1B RXS35K2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.2 ~ 3.0) 3.4 (1.2 ~ 4.5) 3.5 (1.2 ~ 3.8) 4.0 (1.4 ~ 5.0) Capacity Rated (Min. ~ Max.) Btu/h 8,500 (4,100 ~ 10,200) 11,600 (4,100 ~ 15,400)
  • Page 26 Specifications SiBE05-722EE 50 Hz, 220 - 230 - 240 V Indoor Unit FLXS25BAVMB FLXS35BAVMB9 Model RXS25L2V1B RXS35L2V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.2 ~ 3.0) 3.4 (1.2 ~ 4.5) 3.5 (1.2 ~ 3.8) 4.0 (1.4 ~ 5.0) Capacity Rated (Min. ~ Max.) Btu/h 8,500 (4,100 ~ 10,200) 11,600 (4,100 ~ 15,400)
  • Page 27 SiBE05-722EE Specifications 50 Hz, 220 - 230 - 240 V Indoor Unit FLXS25BAVMB FLXS35BAVMB9 Model RXS25L3V1B RXS35L3V1B Outdoor Unit Cooling Heating Cooling Heating 2.5 (1.2 ~ 3.0) 3.4 (1.2 ~ 4.5) 4.0 (1.4 ~ 5.0) Capacity Rated (Min. ~ Max.) Btu/h 8,500 (4,100 ~ 10,200) 11,600 (4,100 ~ 15,400)

  • Page 28: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiBE05-722EE Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit.....................19 2. Outdoor Unit..................21 2.1 RK(X)S25/35E2V1B ................21 2.2 RK(X)S25/35G2V1B................23 2.3 RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B, RXS35K2V1B, RXS25/35L2V1B............25 2.4 RXS25/35L3V1B ..................27 Printed Circuit Board Connector Wiring Diagram...

  • Page 29: Indoor Unit

    SiBE05-722EE Indoor Unit 1. Indoor Unit Control PCB (PCB1) 1) S6 Connector for swing motor (horizontal swing) 2) S7 Connector for AC fan motor 3) S21 Connector for centralized control (HA) 4) S24 Connector for display PCB 5) S26 Connector for signal receiver PCB 6) S32 Connector for indoor heat exchanger thermistor 7) S37...
  • Page 30 Indoor Unit SiBE05-722EE Power Supply PCB (PCB2) 1) S36 Connector for control PCB 2) H1, H2, H3 Connector for terminal board 3) H4, H5, H6 Connector for AC fan motor 4) V1 Varistor 5) FU1 Fuse (3.15 A, 250 V) 2P084361-1 Display PCB (PCB3)

  • Page 31: Outdoor Unit

    SiBE05-722EE Outdoor Unit 2. Outdoor Unit RK(X)S25/35E2V1B Main PCB (PCB2) 1) S10 Connector for filter PCB 2) S20 Connector for electronic expansion valve coil 3) S30 Connector for compressor 4) S40 Connector for overload protector 5) S70 Connector for fan motor 6) S80 Connector for four way valve coil 7) S90...
  • Page 32 Outdoor Unit SiBE05-722EE Filter PCB (PCB1) 1) S11 Connector for main PCB 2) HL1, HN1, S Connector for terminal board 3) E Terminal for earth wire 4) HC1, HC2 Connector for main PCB HL2, HN2 5) HR1 Connector for reactor 6) FU3 Fuse (20 A, 250 V) 7) V2, V3...

  • Page 33: Rk(X)S25/35G2V1B

    SiBE05-722EE Outdoor Unit RK(X)S25/35G2V1B Main PCB (PCB2) 1) S10 Connector for filter PCB 2) S20 Connector for electronic expansion valve coil 3) S30 Connector for compressor 4) S40 Connector for overload protector 5) S50 Connector for magnetic relay 6) S70 Connector for fan motor 7) S80 Connector for four way valve coil...
  • Page 34 Outdoor Unit SiBE05-722EE Filter PCB (PCB1) 1) S11 Connector for main PCB 2) HL1, HN1, S Connector for terminal board 3) E1 Terminal for earth wire 4) E2 Connector for terminal board (earth) 5) HL2, HN2 Connector for main PCB 6) HR1 Connector for reactor 7) FU3...

  • Page 35: Rk(X)S25/35G2V1B9, Rxs25/35J2V1B, Rxs25K3V1B, Rxs35K2V1B, Rxs25/35L2V1B

    SiBE05-722EE Outdoor Unit RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B, RXS35K2V1B, RXS25/35L2V1B Main PCB (PCB2) 1) S10 Connector for filter PCB 2) S20 Connector for electronic expansion valve coil 3) S40 Connector for overload protector 4) S50 Connector for magnetic relay 5) S70 Connector for fan motor 6) S80 Connector for four way valve coil 7) S90...
  • Page 36 Outdoor Unit SiBE05-722EE Filter PCB (PCB1) 1) S11 Connector for main PCB 2) AC1, AC2, S Connector for terminal board 3) E1, E2 Terminal for earth wire 4) HL2, HN2 Connector for main PCB 5) HR1 Connector for reactor 6) FU1 Fuse (3.15 A, 250 V) 7) FU3 Fuse (20 A, 250 V)

  • Page 37: Rxs25/35L3V1B

    SiBE05-722EE Outdoor Unit RXS25/35L3V1B Main PCB (PCB1) 1) S20 Connector for electronic expansion valve coil 2) S30 Connector for compressor motor 3) S40 Connector for overload protector 4) S50 Connector for magnetic relay 5) S71 Connector for DC fan motor 6) S80 Connector for four way valve coil 7) S90...

  • Page 38: Part 4 Functions And Control

    SiBE05-722EE Part 4 Functions and Control 1. Main Functions..................29 1.1 Temperature Control ................29 1.2 Frequency Principle................29 1.3 Airflow Direction Control.................31 1.4 Fan Speed Control for Indoor Unit ............31 1.5 Program Dry Operation ................32 1.6 Automatic Operation................33 1.7 Thermostat Control.................34 1.8 NIGHT SET Mode ..................35 1.9 HOME LEAVE Operation ...............36 1.10 Inverter POWERFUL Operation .............37 1.11 Clock Setting ..................38...

  • Page 39: Main Functions

    SiBE05-722EE Main Functions 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 40 Main Functions SiBE05-722EE The following drawing shows a schematic view of the inverter principle: 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) low speed...

  • Page 41: Airflow Direction Control

    SiBE05-722EE Main Functions Airflow Direction Control Auto-Swing The following table explains the auto-swing process for cooling, dry, fan, and heating: Up and Down Cooling / Dry / Fan Heating Ceiling (R2964) (R2963) Floor (R2967) (R2966) 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.

  • Page 42: Program Dry Operation

    Main Functions SiBE05-722EE 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 setting buttons are inoperable. Detail The microcomputer automatically sets the temperature and airflow rate. The difference between the room thermistor temperature at start-up and the target temperature is divided into two zones.

  • Page 43: Automatic Operation

    SiBE05-722EE Main Functions Automatic Operation Outline Automatic Cooling/Heating Function When the automatic operation 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. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.

  • Page 44: Thermostat Control

    Main Functions SiBE05-722EE Thermostat Control Outline Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Detail Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Conditions 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 45: Night Set Mode

    SiBE05-722EE Main Functions NIGHT SET Mode Outline When the OFF TIMER is set, NIGHT SET Mode is automatically activated. NIGHT SET Mode keeps the airflow rate setting. Detail NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in cooling, or lowers it slightly in heating.

  • Page 46: Home Leave Operation

    Main Functions SiBE05-722EE HOME LEAVE Operation Outline HOME LEAVE operation is a function that allows you to record your preferred set temperature and airflow rate. You can start your preferred operation mode simply by pressing the HOME LEAVE button on the remote controller. Detail 1.

  • Page 47: Inverter Powerful Operation

    SiBE05-722EE Main Functions How to Set the Temperature and Airflow Rate When using HOME LEAVE operation for the first time, set the temperature and airflow rate for HOME LEAVE operation. Record your preferred temperature and airflow rate. Initial setting Selectable range Temperature Airflow rate Temperature...

  • Page 48: Clock Setting

    Main Functions SiBE05-722EE 1.11 Clock Setting ARC433 Series The clock can be set by taking the following steps: 1. Press the CLOCK button. → is displayed and blinks. 2. Press the TIMER button to set the clock to the present time. Holding down the TIMER button increases or decreases the time display rapidly.

  • Page 49: Other Functions

    SiBE05-722EE Main Functions 1.12 Other Functions 1.12.1 Hot-Start Function In order to prevent the cold air blast that normally occurs when heating operation is started, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or significantly weakened resulting in comfortable heating.

  • Page 50: Thermistor Functions

    Thermistor Functions SiBE05-722EE 2. Thermistor Functions Electronic expansion valve Four way valve Compressor (R14247) (1) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling the 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 51: Control Specification

    SiBE05-722EE Control Specification 3. Control Specification Mode Hierarchy Outline The air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing. Detail Cooling Only Model Air conditioner control mode Forced operstion mode Forced cooling operation (for pump down operstion) Power transistor test mode Normal operation mode...

  • Page 52: Frequency Control

    Control Specification SiBE05-722EE Frequency Control Outline The compressor frequency is determined according to the difference between the room thermistor temperature and the target temperature. When the shift of the frequency is less than zero (∆F<0) by PI control, the target frequency is used as the command frequency. Dropping function Input current control, etc.
  • Page 53 SiBE05-722EE Control Specification 3. Determine lower limit frequency The maximum value is set as a lower limit frequency among the frequency lower limits of the following functions: Four way valve operation compensation, draft prevention, pressure difference upkeep. 4. Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency.

  • Page 54: Controls At Mode Changing / Start-Up

    Control Specification SiBE05-722EE Controls at Mode Changing / Start-up 3.3.1 Preheating Control Outline The inverter operation in open phase starts with the conditions of the outdoor temperature, the discharge pipe temperature, the radiation fin temperature, and the preheating command from the indoor unit.

  • Page 55: Compressor Protection Function

    SiBE05-722EE Control Specification 3.3.3 Four Way Valve Operation Compensation Outline At the beginning of operation as the four way valve is switched, the pressure difference to activate the four way valve is acquired when the output frequency is higher than a certain fixed frequency, for a certain fixed time.

  • Page 56: Discharge Pipe Temperature Control

    Control Specification SiBE05-722EE 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 the discharge pipe temperature from rising further. Detail Stop zone A˚C...

  • Page 57: Input Current Control

    SiBE05-722EE Control Specification Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit based on the input current. In case of heat pump models, this control is the upper limit control of frequency and takes priority over the lower limit control of four way valve operation compensation.

  • Page 58: Freeze-Up Protection Control

    Control Specification SiBE05-722EE Freeze-up Protection Control During cooling operation, the signal sent from the indoor unit determines the frequency upper limit and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into zones.) The operating frequency limitation is judged with the indoor heat exchanger temperature. Indoor heat exchanger thermistor temperature 13˚C...

  • Page 59: Outdoor Fan Control

    SiBE05-722EE 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 during defrosting The outdoor fan is turned OFF during defrosting.

  • Page 60: Defrost Control

    Control Specification SiBE05-722EE 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 defrosting. Detail Conditions for Starting Defrost The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature.

  • Page 61: Electronic Expansion Valve Control

    SiBE05-722EE Control Specification 3.11 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Open Control 1.

  • Page 62: Pressure Equalizing Control

    Control Specification SiBE05-722EE 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 is equalized. 3.11.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens, and develops the pressure equalization.
  • Page 63 SiBE05-722EE Control Specification 3.11.7 Discharge Pipe Thermistor Disconnection Control 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, operates for a specified time, and then stops.

  • Page 64: Malfunctions

    Control Specification SiBE05-722EE 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction can be detected in the following thermistors: 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Outdoor temperature thermistor 3.12.2 Detection of Overcurrent and Overload Outline An excessive output current is detected and the OL temperature is observed to protect the compressor.

  • Page 65: Part 5 Remote Controller

    SiBE05-722EE Part 5 Remote Controller 1. Remote Controller .................56 Remote Controller...

  • Page 66: Remote Controller

    2 Inverter POWERFUL operation P.37 Note: Refer to the operation manual of applicable model for details. You can download operation manuals from Daikin Business Portal: Daikin Business Portal → Document Search → Item Category → Installation/Operation Manual (URL: https://global1d.daikin.com/business_portal/login/) Remote Controller...

  • Page 67: Mode Button

    4 Clock setting P.38 Note: Refer to the operation manual of applicable model for details. You can download operation manuals from Daikin Business Portal: Daikin Business Portal → Document Search → Item Category → Installation/Operation Manual (URL: https://global1d.daikin.com/business_portal/login/) Remote Controller...

  • Page 68: Part 6 Service Diagnosis

    SiBE05-722EE Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items ........59 2. Troubleshooting with LED ..............60 2.1 Indoor Unit....................60 2.2 Outdoor Unit ...................60 3. Service Diagnosis .................61 4. Troubleshooting ..................64 4.1 Error Codes and Descriptions ..............64 4.2 Indoor Unit PCB Abnormality ..............65 4.3 Freeze-up Protection Control / Heating Peak-cut Control ......66 4.4 Fan Motor (AC Motor) or Related Abnormality........67 4.5 Thermistor or Related Abnormality (Indoor Unit)........69...

  • Page 69: General Problem Symptoms And Check Items

    SiBE05-722EE General Problem Symptoms and Check Items 1. General Problem Symptoms and Check Items Symptom Check Item Measures 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 70: Troubleshooting With Led

    Troubleshooting with LED SiBE05-722EE 2. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.

  • Page 71: Service Diagnosis

    SiBE05-722EE Service Diagnosis 3. Service Diagnosis 1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature Method 1 display screen. Timer cancel button < ARC433 Series > (R18206) 2. Press the timer cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below.
  • Page 72 Service Diagnosis SiBE05-722EE Method 2 1. Press the center of the TEMP button and the MODE button at the same time to enter the diagnosis mode. (R4272) The left-side number blinks. (R14967) 2. Press the TEMP or TEMP button and change the number until you hear the two consecutive beeps or the long beep.
  • Page 73 SiBE05-722EE Service Diagnosis 5. Press the TEMP or TEMP button and change the number until you hear the long beep. (R4277) 6. Diagnose by the sound. beep: The left-side number does not correspond with the error code. two consecutive beeps: The left-side number corresponds with the error code but the right-side number does not.

  • Page 74: Troubleshooting

    Troubleshooting SiBE05-722EE 4. Troubleshooting Error Codes and Descriptions 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 75: Indoor Unit Pcb Abnormality

    SiBE05-722EE Troubleshooting Indoor Unit PCB Abnormality Error Code Method of Error The system checks if the circuit works properly within the microcomputer of the indoor unit. Detection Error Decision The system cannot set the internal settings. Conditions Supposed Wrong models interconnected Defective indoor unit PCB Causes Disconnection of connector...

  • Page 76: Freeze-Up Protection Control / Heating Peak-Cut Control

    Troubleshooting SiBE05-722EE Freeze-up Protection Control / Heating Peak-cut Control Error Code Method of Error Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated Detection according to the temperature detected by the indoor heat exchanger thermistor. Heating peak-cut control During heating operation, the temperature detected by the indoor heat exchanger thermistor is used for the heating peak-cut control (operation halt, outdoor fan stop, etc.)

  • Page 77: Fan Motor (Ac Motor) Or Related Abnormality

    SiBE05-722EE Troubleshooting Fan Motor (AC Motor) or Related Abnormality Error Code Method of Error The rotation speed detected by the Hall IC during fan motor operation determines abnormal fan motor operation. Detection Error Decision The detected rotation speed does not reach the demanded rotation speed of the target tap. Conditions Supposed Power supply voltage is not as specified.
  • Page 78 Troubleshooting SiBE05-722EE Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.04 Check the power supply voltage. Refer to P.103 Is the voltage fluctuation Correct the power supply. within ±10% from the rated value? Start operation.

  • Page 79: Thermistor Or Related Abnormality (Indoor Unit)

    SiBE05-722EE Troubleshooting Thermistor or Related Abnormality (Indoor Unit) C4 , C9 Error Code Method of Error The temperatures detected by the thermistors determine thermistor errors. Detection Error Decision The voltage between the both ends of the thermistor is 4.96 V and more or 0.04 V and less during compressor operation.

  • Page 80: Refrigerant Shortage

    Troubleshooting SiBE05-722EE Refrigerant Shortage Error Code Method of Error Refrigerant shortage detection I: Refrigerant shortage is detected by checking the input current value and the compressor Detection running frequency. If the refrigerant is short, the input current is lower than the normal value. Refrigerant shortage detection II: Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of the electronic expansion valve.
  • Page 81 SiBE05-722EE Troubleshooting 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.102 Any thermistor Replace the thermistor(s) disconnected? position. ∗ Discharge pipe thermistor ∗ Indoor or outdoor heat exchanger thermistor Check No.12 ∗...

  • Page 82: Low-Voltage Detection Or Over-Voltage Detection

    Troubleshooting SiBE05-722EE Low-voltage Detection or Over-voltage Detection Error Code Method of Error Low-voltage detection: 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. Error Decision Low-voltage detection: Conditions...
  • Page 83 SiBE05-722EE Troubleshooting 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. Is the voltage fluctuation Correct the power supply. within ±10% from the rated value? Check the connection of the compressor harness.

  • Page 84: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    Troubleshooting SiBE05-722EE Signal Transmission Error (Between Indoor Unit and Outdoor Unit) Error Code Method of Error The data received from the outdoor unit in signal transmission is checked whether it is normal. Detection Error Decision The data sent from the outdoor unit cannot be received normally, or the content of the data is Conditions abnormal.
  • Page 85 SiBE05-722EE Troubleshooting 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.103 Is the voltage fluctuation Correct the power supply. within ±10% from the rated value? Check the indoor unit - outdoor...

  • Page 86: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    Troubleshooting SiBE05-722EE Unspecified Voltage (Between Indoor Unit and Outdoor Unit) Error Code Method of Error The supply power is detected for its requirements (pair type is different from multi type) by the indoor / outdoor transmission signal. Detection Error Decision The pair type and multi type are interconnected.

  • Page 87: Outdoor Unit Pcb Abnormality

    SiBE05-722EE Troubleshooting 4.10 Outdoor Unit PCB Abnormality Error Code Method of Error The system checks if the microprocessor is working in order. The system checks if the zero-cross signal comes in properly. Detection Error Decision The microprocessor program runs out of control. The zero-cross signal is not detected.
  • Page 88 Troubleshooting SiBE05-722EE Troubleshooting RXS25/35L3V1B Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn on the power again. Check the voltage of the connection wires on the indoor terminal board between No. 1 and No.

  • Page 89: Ol Activation (Compressor Overload)

    SiBE05-722EE Troubleshooting 4.11 OL Activation (Compressor Overload) Error Code Method of Error A compressor overload is detected through compressor OL. Detection Error Decision If the error repeats, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error Conditions Supposed Disconnection of discharge pipe thermistor...
  • Page 90 Troubleshooting SiBE05-722EE 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.102 Discharge pipe thermistor Insert the thermistor in disconnected? position. Check No.12 Refer to P.104 Check No.

  • Page 91: Compressor Lock

    SiBE05-722EE Troubleshooting 4.12 Compressor Lock Error Code Method of Error A compressor lock is detected by checking the compressor running condition through the position detection circuit. Detection Error Decision A compressor lock is detected by the current waveform generated when applying high- frequency voltage to the motor.

  • Page 92: Dc Fan Lock

    Troubleshooting SiBE05-722EE 4.13 DC Fan Lock Error Code Method of Error An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Detection Error Decision The fan does not start in 15 ~ 60 seconds (depending on the model) even when the fan motor is running.

  • Page 93: Input Overcurrent Detection

    SiBE05-722EE Troubleshooting 4.14 Input Overcurrent Detection Error Code Method of Error An input overcurrent is detected by checking the input current value with the compressor running. Detection Error Decision The current exceeds about 9.25 A for 2.5 seconds with the compressor running. (The upper limit of the current decreases when the outdoor temperature exceeds a certain Conditions level.)

  • Page 94: Four Way Valve Abnormality

    Troubleshooting SiBE05-722EE 4.15 Four Way Valve Abnormality Error Code Method of Error The room temperature thermistor and the indoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode. Detection Error Decision A following condition continues over 10 minutes after operating for 5 minutes. Conditions Cooling / Dry A –...
  • Page 95 SiBE05-722EE 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 Refer to P.102 Correct the four way valve disconnected (loose)? coil. Check No.13 Refer to P.105 Harness disconnected? Reconnect the harness.

  • Page 96: Discharge Pipe Temperature Control

    Troubleshooting SiBE05-722EE 4.16 Discharge Pipe Temperature Control Error Code Method of Error An error is determined with the temperature detected by the discharge pipe thermistor. Detection Error Decision If the temperature detected by the discharge pipe thermistor rises above A°C, the compressor stops.

  • Page 97: High Pressure Control In Cooling

    SiBE05-722EE Troubleshooting 4.17 High Pressure Control in Cooling Error Code Method of Error High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection Error Decision The temperature sensed by the outdoor heat exchanger thermistor rises above about 65°C.

  • Page 98: Compressor System Sensor Abnormality

    Troubleshooting SiBE05-722EE 4.18 Compressor System Sensor Abnormality Error Code Method of Error The system checks the DC current before the compressor starts. Detection Error Decision The voltage converted from the DC current before compressor start-up is out of the range 0.5 ~ 4.5 V.

  • Page 99: Position Sensor Abnormality

    SiBE05-722EE Troubleshooting 4.19 Position Sensor Abnormality Error Code Method of Error A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Detection Error Decision If the error repeats, the system is shut down. Reset condition: Continuous run for about 11 minutes without any other error Conditions Supposed...
  • Page 100 Troubleshooting SiBE05-722EE Troubleshooting 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.106 Turn off the power. Check No.18 Check the power supply voltage. Refer to P.109 Is the power supply Check No.20...

  • Page 101: Dc Voltage / Current Sensor Abnormality

    SiBE05-722EE Troubleshooting 4.20 DC Voltage / Current Sensor Abnormality Error Code Method of Error DC voltage or DC current sensor abnormality is identified based on the compressor running frequency and the input current. Detection Error Decision If the error repeats, the system is shut down. Reset condition: Continuous run for about 60 minutes without any other error Conditions Supposed...

  • Page 102: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting SiBE05-722EE 4.21 Thermistor or Related Abnormality (Outdoor Unit) H9 , J3 , J6 , P4 Error Code Method of Error This fault is identified based on the thermistor input voltage to the microcomputer. A thermistor fault is identified based on the temperature sensed by each thermistor. Detection Error Decision The voltage between the both ends of the thermistor is above 4.96 V or below 0.04 V with...
  • Page 103 SiBE05-722EE Troubleshooting Troubleshooting In case of RK(X)S25/35E2V1B In case of H9 , J3 , J6 for RK(X)S25/35G2V1B, RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B, RXS35K2V1B, RXS25/35L2V1B, RXS25/35L3V1B Check No.01 Be sure to turn off the power switch before connecting or disconnecting Refer to P.102 Caution connectors, or parts may be damaged.

  • Page 104: Electrical Box Temperature Rise

    Troubleshooting SiBE05-722EE 4.22 Electrical Box Temperature Rise Error Code Method of Error An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Detection Error Decision 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 105 SiBE05-722EE Troubleshooting Troubleshooting RK(X)S25/35E2V1B Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 WARNING Turn off the power. Then, turn on Refer to P.102 the power to restart the system. To cool the electrical components, the outdoor fan starts when the radiation fin temperature rises...
  • Page 106 Troubleshooting SiBE05-722EE Troubleshooting RK(X)S25/35G2V1B, RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B, RXS35K2V1B, RXS25/35L2V1B, RXS25/35L3V1B 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. Then, turn on Refer to P.109 the power to restart the system.

  • Page 107: Radiation Fin Temperature Rise

    SiBE05-722EE Troubleshooting 4.23 Radiation Fin Temperature Rise Error Code Method of Error A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on. Detection Error Decision 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 108 Troubleshooting SiBE05-722EE Troubleshooting RK(X)S25/35E2V1B Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn off the power. Then, turn on Refer to P.102 the power to restart the system. Check No.17 Refer to P.109 Has the PCB been...
  • Page 109 SiBE05-722EE Troubleshooting Troubleshooting RK(X)S25/35G2V1B, RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B, RXS35K2V1B, RXS25/35L2V1B, RXS25/35L3V1B 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. Then, turn on Refer to P.109 the power to restart the system.

  • Page 110: Output Overcurrent Detection

    Troubleshooting SiBE05-722EE 4.24 Output Overcurrent Detection Error Code Method of Error An output overcurrent is detected by checking the current that flows in the inverter DC section. Detection Error Decision A position signal error occurs while the compressor is running. A rotation speed error occurs while the compressor is running.
  • Page 111 SiBE05-722EE 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 Refer to P.106 overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.

  • Page 112: Check

    Check SiBE05-722EE 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 multimeter. The data is for reference purpose only. Thermistor temperature (°C) Resistance (kΩ) –20 197.8 –15 148.2...

  • Page 113: Hall Ic Check

    SiBE05-722EE Check Hall IC Check Check No.04 1. Check the connector connection. 2. With the power on, operation off, and the connector connected, check the following. (1) Output voltage of about 5 V between pins 1 and 3. (2) Generation of 3 pulses between pins 2 and 3 when the fan motor is operating. If NG in step (1) Defective PCB Replace the PCB (control PCB).

  • Page 114: Electronic Expansion Valve Check

    Check SiBE05-722EE Electronic Expansion Valve Check Check No.12 Conduct the following to check the electronic expansion valve (EV). 1. Check if the EV connector is correctly connected to the PCB. 2. Turn the power off and on again, and check if the EV generates a latching sound. 3.

  • Page 115: Four Way Valve Performance Check

    SiBE05-722EE Check Four Way Valve Performance Check Check No.13 Turn off the power. Then, turn on the power to restart the system. ∗ Four way valve coil Start heating operation. Cooling / Dry: Not energized Heating: Energized voltage at 220 - 240 Replace the outdoor unit VAC with compressor PCB (main PCB).

  • Page 116: Inverter Analyzer Check

    Check SiBE05-722EE Inverter Analyzer Check Check No.15 Characteristics Inverter analyzer: RSUK0917C If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (main PCB, power module, etc.).
  • Page 117 SiBE05-722EE Check RXS25/35L3V1B Activate power transistor test operation from indoor unit. (1) Turn the power on. (2) Select FAN operation with the MODE button on the remote controller. (3) Press the center of the TEMP button and the MODE button at the same time. →...

  • Page 118: Rotation Pulse Check On The Outdoor Unit Pcb

    Check SiBE05-722EE Rotation Pulse Check on the Outdoor Unit PCB Check No.16 RK(X)S25/35E2V1B, RK(X)S25/35G2V1B, RXS25/35L3V1B Make sure that the voltage of 320 ± 30 V is applied. 1. Set operation off and power off. Disconnect the connector S70 or S71. 2.

  • Page 119: Installation Condition Check

    SiBE05-722EE 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 120: Outdoor Fan System Check

    Check SiBE05-722EE 5.11 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system. Fan motor Is the lead wire connector outdoor fan running? Go to Check No. 16. disconnected? Reconnect the connector. Outdoor fan system is functioning. (R21195) 5.12 Main Circuit Short Check Check No.20...
  • Page 121 SiBE05-722EE Check RK(X)S25/35G2V1B + ~ ~ – Multimeter (R19665) RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B, RXS35K2V1B, RXS25/35L2V1B Multimeter (R19666) Service Diagnosis...

  • Page 122: Power Module Check

    Check SiBE05-722EE RXS25/35L3V1B Multimeter (R20698) 5.13 Power Module Check Check No.22 Check to make sure that the voltage between (+) and (–) of the power module is about 0 V before checking. Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.
  • Page 123 SiBE05-722EE Check RK(X)S25/35E2V1B Pin 35: – Pin 34: W Pin 33: V Pin 32: U Pin 31: + (R22979) RK(X)S25/35G2V1B Power module Pin 20: – Pin 21: U Pin 22: V Pin 23: W Pin 24: + (R23023) Service Diagnosis...
  • Page 124 Check SiBE05-722EE RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B, RXS35K2V1B, RXS25/35L2V1B DC + = Power module (+) DC – = Power module (–) (R20794) RXS25/35L3V1B Pin 24: + Pin 23: U Pin 22: V Pin 21: W Pin 20: – (R20703) Service Diagnosis...

  • Page 125: Part 7 Trial Operation And Field Settings

    SiBE05-722EE Part 7 Trial Operation and Field Settings 1. Tips for Servicing ................116 1.1 Pump Down Operation .................116 1.2 Forced Cooling Operation ..............116 2. Trial Operation ..................118 3. Field Settings ..................119 3.1 When 2 Units are Installed in 1 Room..........119 3.2 Facility Setting Jumper (cooling at low outdoor temperature) ....120 3.3 Jumper and Switch Settings..............121 4.

  • Page 126: Tips For Servicing

    Tips for Servicing SiBE05-722EE 1.Tips for Servicing Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing of 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 127 SiBE05-722EE Tips for Servicing Indoor Unit ON/OFF button (SW1) (R19667) Outdoor Unit: RK(X)S25/35E2V1B, RK(X)S25/35G2V1B Forced cooling operation ON/OFF button Screwdriver (R22980) Outdoor Unit: RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B, RXS35K2V1B, RXS25/35L2V1B Forced cooling operation ON/OFF button Screwdriver Push here (R22528) Caution When pressing the button, do not touch the terminal board. It has a high voltage and may cause electric shock.

  • Page 128: Trial Operation

    Trial Operation SiBE05-722EE 2. Trial Operation Outline 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. Trial operation should be carried out in either cooling or heating operation. Detail 1.

  • Page 129: Field Settings

    SiBE05-722EE Field Settings 3. Field Settings When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different addresses. Both the indoor unit PCB and the wireless remote controller need alteration.

  • Page 130: Facility Setting Jumper (Cooling At Low Outdoor Temperature)

    Field Settings SiBE05-722EE Facility Setting Jumper (cooling at low outdoor temperature) Outline 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 (a place where people are present). Detail You can expand the operation range to –15°C by cutting the jumper on the outdoor unit PCB.

  • Page 131: Jumper And Switch Settings

    SiBE05-722EE Field Settings Jumper and Switch Settings Indoor Unit Function Jumper When connected When cut (factory setting) Fan speed setting when Fan speed setting ; The fan stops. compressor stops for Remote controller thermostat OFF. (effective only setting in cooling operation) Power failure recovery function Auto-restart The unit does not resume...

  • Page 132: Silicone Grease On Power Transistor / Diode Bridge

    Silicone Grease on Power Transistor / Diode Bridge SiBE05-722EE 4. Silicone Grease on Power Transistor / Diode Bridge Outline Apply the specified silicone grease to the heat radiation part of a power transistor / diode bridge when you replace an outdoor unit PCB. The silicone grease encourages the heat radiation of a power transistor / diode bridge.

  • Page 133: Part 8 Appendix

    SiBE05-722EE Part 8 Appendix 1. Piping Diagrams..................124 1.1 Indoor Unit....................124 1.2 Outdoor Unit ..................125 2. Wiring Diagrams..................128 2.1 Indoor Unit....................128 2.2 Outdoor Unit ..................129 Appendix...

  • Page 134: Piping Diagrams

    Piping Diagrams SiBE05-722EE 1. Piping Diagrams Indoor Unit FLKS25/35BAVMB FLXS25/35BAVMB, FLXS35BAVMB9 INDOOR UNIT INDOOR UNIT ( 6.4CuT ) ( 6. 4CuT ) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR FIELD PIPING ON HEAT THERMISTOR ( 6.4CuT ) EXCH. SIROCCO FAN FIELD PIPING ON HEAT ( 6.

  • Page 135: Outdoor Unit

    SiBE05-722EE Piping Diagrams Outdoor Unit 1.2.1 Cooling Only RKS25/35E2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER 7.0CuT THERMISTOR 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 4.8CuT 6.4CuT 6.4CuT 4.8CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOUR WAY FIELD PIPING VALVE...
  • Page 136 Piping Diagrams SiBE05-722EE 1.2.2 Heat Pump RXS25/35E2V1B OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 7.0CuT 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 4.8CuT 6.4CuT 6.4CuT 4.8CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT MUFFLER WITH FILTER FOURWAY VALVE FIELD PIPING ( 6.4CuT ) ON:HEATING...
  • Page 137 SiBE05-722EE Piping Diagrams RXS25L3V1B Outdoor unit Heat exchanger 7.0 CuT Outdoor air temperature thermistor 7.0 CuT Heat exchanger thermistor Motor-operated valve 4.8 CuT 4.8 CuT 6.4 CuT 6.4 CuT 6.4 CuT 4.8 CuT 4.8 CuT Muffler with filter Muffler with filter Propeller fan 9.5 CuT Muffler with filter...

  • Page 138: Wiring Diagrams

    Wiring Diagrams SiBE05-722EE 2. Wiring Diagrams Indoor Unit FLK(X)S25/35BAVMB, FLXS35BAVMB9 PCB3 PCB1 PCB2 3.15A → H1P H2P H3P OUTDOOR GRN/YLW PCB4 FIELD WIRING. TRANSMISSION CAUTION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF SIGNAL THE MAIN POWER SUPPLY IS RECEIVER TURNED OFF AND THEN BACK INDOOR ON AGAIN.

  • Page 139: Outdoor Unit

    SiBE05-722EE Wiring Diagrams Outdoor Unit RK(X)S25/35E2V1B R12T t˚ C100 INDOOR FIELD WIRING. PCB1 MRM20 IPM1 HL1 20A MRM10 3.15A IC11 3.15A W V U PCB2 MRCW OUTDOOR NOTE t˚ t˚ t˚ 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. IN CASE OF IN CASE OF R2T R3T...
  • Page 140 Wiring Diagrams SiBE05-722EE RK(X)S25/35G2V1B FIELD WIRING. MRM20 IPM1 indoor MRM10 C118 3.15A MR30 3.15A W V U PCB2 PCB1 MR30_A MR30_B MRCW outdoor NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. IN CASE OF t˚ t˚ t˚ C5, C6, C119 : CAPACITOR HEAT PUMP DB1, DB2...
  • Page 141 SiBE05-722EE Wiring Diagrams RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B, RXS35K2V1B, RXS25/35L2V1B FIELD WIRING. INDOOR MRM20 IPM1 MRM10 C119 MR30 3.15A PCB2 3.15A IPM2 MR30_A MR30_B MRCW S100 PCB1 X11A 4 7 10 OUTDOOR NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. C5 , C6 , C119 : CAPACITOR t˚...
  • Page 142 Wiring Diagrams SiBE05-722EE RXS25/35L3V1B Field wiring IPM1 Indoor MRM10 C400 MR30 C405 V150 3.15A 3.15A PCB1 MRCW Outdoor FU1,FU2,FU3 : Fuse t˚ t˚ t˚ : Coil : Reactor HL1, HN1, E1, E2, HR1, HR2 X12A X12A, S, MR30_A, MR30_B : Connection Outdoor Condenser R1T, R2T, R3T...
  • Page 143 Revision History Month / Year Version Revised contents 01 / 2007 SiBE05-722 First edition 05 / 2010 SiBE05-722_A Model addition: RK(X)S25/35G2V1B, RK(X)S25/35G2V1B9 01 / 2011 SiBE05-722_B Model addition: RXS25/35J2V1B 12 / 2012 SiBE05-722_C Model addition: RXS25K3V1B, RXS35K2V1B 01 / 2014 SiBE05-722ED Model addition: FLXS35BAVMB9, RXS35L2V1B 01 / 2016...
  • Page 144 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.

This manual is also suitable for:

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