Daikin Inverter FLKS25BVMB User manual

SiBE05-311
Inverter Pair
Floor / Ceiling Suspended Dual Type
B-Series
Service
Manual
[Applied Models]

Inverter Pair : Cooling Only

Inverter Pair : Heat Pump

SiBE05-311
Table of Contents i
Inverter Pair
B-Series
Cooling Only
Indoor Unit
FLKS25BVMB FLKS35BVMB
FLK25BVMB FLK35BVMB
Outdoor Unit
RKS25BVMB RKS35BVMB
RK25BVMB RK35BVMB
Heat Pump
Indoor Unit
FLXS25BVMB FLXS35BVMB
FLX25BVMB FLX35BVMB
Outdoor Unit
RXS25BVMB RXS35BVMB
RX25BVMB RX35BVMB

SiBE05-311
ii Table of Contents
1. Introduction .............................................................................................v
1.1 Safety Cautions....................................................................................... v
Part 1 List of Functions ................................................................1
1. List of Functions......................................................................................2
1.1 Cooling Only............................................................................................2
1.2 Heat Pump...............................................................................................3
Part 2 Specifications.....................................................................5
1. Specifications..........................................................................................6
1.1 Cooling Only............................................................................................6
1.2 Heat Pump...............................................................................................8
Part 3 Printed Circuit Board
Connector Wiring Diagram...............................................11
1. Printed Circuit Board Connector Wiring Diagram..................................12
1.1 Indoor Unit.............................................................................................12
1.2 Outdoor Unit..........................................................................................14
Part 4 Function and Control........................................................17
1. Main Functions......................................................................................18
1.1 Frequency Principle...............................................................................18
1.2 Auto-Swing............................................................................................20
1.3 Fan Speed Control for Indoor Units.......................................................21
1.4 Programme Dry Function ...................................................................... 22
1.5 Automatic Operation..............................................................................23
1.6 Night Set Mode......................................................................................24
1.7 Home Leave Operation ......................................................................... 25
1.8 Inverter Powerful Operation................................................................... 26
1.9 Other Functions.....................................................................................27
2. Function of Main Structural Parts..........................................................28
2.1 Main Structural Parts.............................................................................28
2.2 Function of Thermistor........................................................................... 29
3. Control Specification.............................................................................31
3.1 Mode Hierarchy.....................................................................................31
3.2 Frequency Control.................................................................................32
3.3 Controls at Mode Changing / Start-up...................................................34
3.4 Discharge Pipe Control.......................................................................... 35
3.5 Input Current Control.............................................................................35
3.6 Freeze-up Protection Control ................................................................ 36
3.7 Heating Peak-cut Control ...................................................................... 36
3.8 Fan Control............................................................................................37
3.9 Moisture Protection Function 1
(Securing of Differential Pressure and Blown Air Temperature)............ 37
3.10 Moisture Protection Function 2..............................................................38
3.11 Defrost Control ...................................................................................... 39
3.12 Electronic Expansion Valve Control ...................................................... 40
3.13 Malfunctions .......................................................................................... 43

SiBE05-311
Table of Contents iii
3.14 Forced Operation Mode......................................................................... 44
3.15 Additional Function................................................................................44
Part 5 System Configuration.......................................................45
1. System Configuration............................................................................46
2. Instruction..............................................................................................47
2.1 Safety Precautions ................................................................................ 47
2.2 Names of Parts......................................................................................49
2.3 Preparation before Operation................................................................52
2.4 AUTO · DRY · COOL · HEAT · FAN Operation.....................................55
2.5 Adjusting the Air Flow Direction............................................................. 57
2.6 POWERFUL Operation ......................................................................... 59
2.7 OUTDOOR UNIT SILENT Operation .................................................... 60
2.8 HOME LEAVE Operation ...................................................................... 61
2.9 TIMER Operation................................................................................... 63
2.10 Care and Cleaning.................................................................................65
2.11 Troubleshooting.....................................................................................68
Part 6 Service Diagnosis.............................................................71
1. Caution for Diagnosis............................................................................72
2. Problem Symptoms and Measures.......................................................73
3. Service Check Function........................................................................74
4. Troubleshooting ....................................................................................75
4.1 Error Codes and Description.................................................................75
4.2 Indoor Unit PCB Abnormality................................................................. 76
4.3 Freeze-up Protection Control or High Pressure Control........................ 77
4.4 Fan Motor (AC Motor) or Related Abnormality...................................... 79
4.5 Thermistor or Related Abnormality (Indoor Unit)................................... 80
4.6 Signal Transmission Error (between Indoor and Outdoor Units)........... 81
4.7 OL Activation (Compressor Overload)................................................... 82
4.8 Compressor Lock .................................................................................. 83
4.9 Input Over Current Detection................................................................. 84
4.10 Four Way Valve Abnormality.................................................................85
4.11 Discharge Pipe Temperature Control....................................................87
4.12 Position Sensor Abnormality ................................................................. 88
4.13 CT or Related Abnormality....................................................................89
4.14 Thermistor or Related Abnormality (Outdoor Unit)................................ 91
4.15 Electrical Box Temperature Rise........................................................... 93
4.16 Radiation Fin Temperature Rise............................................................ 95
4.17 Output Over Current Detection..............................................................97
4.18 Insufficient Gas......................................................................................99
4.19 Over-voltage Detection........................................................................101
4.20 High Pressure Control in Cooling........................................................102
5. Check..................................................................................................104
5.1 How to Check......................................................................................104
Part 7 Removal Procedure........................................................113
1. Indoor Unit...........................................................................................114
1.1 Removal of the Air Filter / Front Grille.................................................114

SiBE05-311
iv Table of Contents
1.2 Removal of the Front Panel.................................................................117
1.3 Removal of the Horizontal Blade.........................................................119
1.4 Removal of the Signal Receiver Unit / Swing Motor............................120
1.5 Removal of the Discharge Grille..........................................................121
1.6 Removal of the Drain Pan ................................................................... 122
1.7 Removal of the Electrical Box / PCB...................................................123
1.8 Removal of the Fan Rotor / Fan Motor................................................126
1.9 Removal of the Heat Exchanger..........................................................128
2. Outdoor Unit........................................................................................130
2.1 Removal of External Casing................................................................130
2.2 Removal of Bell mouth and Left Side Plate.........................................133
2.3 Removal of PCB and Electrical Box....................................................134
2.4 Removal of Propeller Fan and Fan Motor ........................................... 140
2.5 Removal of Compressor Noise Absorption Pad..................................142
2.6 Removal of Partition Plate and Reactor .............................................. 144
2.7 Removal of Four Way Valve and Motor Valve..................................... 147
2.8 Removal of Compressor......................................................................150
Part 8 Others.............................................................................153
1. Others .................................................................................................154
1.1 Test Run from the Remote Controller.................................................. 154
1.2 Jumper Settings................................................................................... 155
Part 9 Appendix.........................................................................157
1. Piping Diagrams..................................................................................158
1.1 Indoor Units.........................................................................................158
1.2 Outdoor Units ...................................................................................... 159
2. Wiring Diagrams..................................................................................161
2.1 Indoor Units.........................................................................................161
2.2 Outdoor Units ...................................................................................... 162
Index .............................................................................................i
Drawings & Flow Charts ................................................................v

SiBE05-311 Introduction
v
1. Introduction
1.1 Safety Cautions
Cautions and
Warnings Be sure to read the following safety cautions before conducting repair work.
The caution items are classified into “ Warning” and “ Caution”. The “ Warning”
items are especially important since they can lead to death or serious injury if they are not
followed closely. The “ Caution” items can also lead to serious accidents under some
conditions if they are not followed. Therefore, be sure to observe all the safety caution items
described below.
About the pictograms
This symbol indicates an item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
This symbol indicates a prohibited action.
The prohibited item or action is shown inside or near the symbol.
This symbol indicates an action that must be taken, or an instruction.
The instruction is shown inside or near the symbol.
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.
1.1.1 Caution in Repair
Warning
Be sure to disconnect the power cable plug from the plug socket before
disassembling the equipment for a repair.
Working on the equipment that is connected to a power supply can cause an
electrical shook.
If it is necessary to supply power to the equipment to conduct the repair or
inspecting the circuits, do not touch any electrically charged sections of the
equipment.
If the refrigerant gas discharges during the repair work, do not touch the
discharging refrigerant gas.
The refrigerant gas can cause frostbite.
When disconnecting the suction or discharge pipe of the compressor at the
welded section, release the refrigerant gas completely at a well-ventilated
place first.
If there is a gas remaining inside the compressor, the refrigerant gas or
refrigerating machine oil discharges when the pipe is disconnected, and it can
cause injury.
If the refrigerant gas leaks during the repair work, ventilate the area. The
refrigerant gas can generate toxic gases when it contacts flames.
The step-up capacitor supplies high-voltage electricity to the electrical
components of the outdoor unit.
Be sure to discharge the capacitor completely before conducting repair work.
A charged capacitor can cause an electrical shock.
Do not start or stop the air conditioner operation by plugging or unplugging the
power cable plug.
Plugging or unplugging the power cable plug to operate the equipment can
cause an electrical shock or fire.

Introduction SiBE05-311
vi
1.1.2 Cautions Regarding Products after Repair
Caution
Do not repair the electrical components with wet hands.
Working on the equipment with wet hands can cause an electrical shock.
Do not clean the air conditioner by splashing water.
Washing the unit with water can cause an electrical shock.
Be sure to provide the grounding when repairing the equipment in a humid or
wet place, to avoid electrical shocks.
Be sure to turn off the power switch and unplug the power cable when cleaning
the equipment.
The internal fan rotates at a high speed, and cause injury.
Do not tilt the unit when removing it.
The water inside the unit can spill and wet the furniture and floor.
Be sure to check that the refrigerating cycle section has cooled down
sufficiently before conducting repair work.
Working on the unit when the refrigerating cycle section is hot can cause burns.
Use the welder in a well-ventilated place.
Using the welder in an enclosed room can cause oxygen deficiency.
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 can cause an electrical shock,
excessive heat generation or fire.
When relocating the equipment, make sure that the new installation site has
sufficient strength to withstand the weight of the equipment.
If the installation site does not have sufficient strength and if the installation
work is not conducted securely, the equipment can fall and cause injury.
Be sure to install the product correctly by using the provided standard
installation frame.
Incorrect use of the installation frame and improper installation can cause the
equipment to fall, resulting in injury.
For integral units
only
Be sure to install the product securely in the installation frame mounted on a
window frame.
If the unit is not securely mounted, it can fall and cause injury.
For integral units
only

SiBE05-311 Introduction
vii
1.1.3 Inspection after Repair
Be sure to use an exclusive power circuit for the equipment, and follow the
technical standards related to the electrical equipment, the internal wiring
regulations and the instruction manual for installation when conducting
electrical work.
Insufficient power circuit capacity and improper electrical work can cause an
electrical shock or fire.
Be sure to use the specified cable to connect between the indoor and outdoor
units.Make the connectionssecurely androute the cableproperly sothat there
is no force pulling the cable at the connection terminals.
Improper connections can cause excessive heat generation or fire.
When connecting the cable between the indoor and outdoor units, make sure
that the terminal cover does not lift off or dismount because of the cable.
If the cover is not mounted properly, the terminal connection section can cause
an electrical shock, excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cable can cause an electrical shock or fire.
Placingheavy itemson thepower cable,andheating orpulling thepower cable
can damage the cable.
Do not mix air or gas other than the specified refrigerant (R410A) in the
refrigerant system.
If air enters the refrigerating system, an excessively high pressure results,
causing equipment damage and injury.
If the refrigerant gas leaks, be sure to locate the leak and repair it before
charging the refrigerant. After charging refrigerant, make sure that there is no
refrigerant leak.
If the leak cannot be located and the repair work must be stopped, be sure to
perform pump-down and close the service valve, to prevent the refrigerant gas
from leaking into the room. The refrigerant gas itself is harmless, but it can
generate toxic gases when it contacts flames, such as fan and other heaters,
stoves and ranges.
When replacing the coin battery in the remote controller, be sure to disposed
of the old battery to prevent children from swallowing it.
If a child swallows the coin battery, see a doctor immediately.
Warning
Caution
Installation of a leakage breaker is necessary in some cases depending on the
conditions of the installation site, to prevent electrical shocks.
Do not install the equipment in a place where there is a possibility of
combustible gas leaks.
If a combustible gas leaks and remains around the unit, it can cause a fire.
Be sure to install the packing and seal on the installation frame properly.
If the packing and seal are not installed properly, water can enter the room and
wet the furniture and floor.
For integral units
only
Warning
Check to make sure that the power cable plug is not dirty or loose, then insert
the plug into a power outlet all the way.
If the plug has dust or loose connection, it can cause an electrical shock or fire.
If the power cable and lead wires have scratches or deteriorated, be sure to
replace them.
Damaged cable and wires can cause an electrical shock, excessive heat
generation or fire.

Introduction SiBE05-311
viii
1.1.4 Using Icons
Icons are used to attract the attention of the reader to specific information. The meaning of each
icon is described in the table below:
1.1.5 Using Icons List
Do not use a joined power cable or extension cable, or share the same power
outlet with other electrical appliances, since it can cause an electrical shock,
excessive heat generation or fire.
Warning
Caution
Check to see if the parts and wires are mounted and connected properly, and
if the connections at the soldered or crimped terminals are secure.
Improper installation and connections can cause excessive heat generation,
fire or an electrical shock.
If the installation platform or frame has corroded, replace it.
Corroded installation platform or frame can cause the unit to fall, resulting in
injury.
Check the grounding, and repair it if the equipment is not properly grounded.
Improper grounding can cause an electrical shock.
Be sure to measure the insulation resistance after the repair, and make sure
that the resistance is 1 Mohm or higher.
Faulty insulation can cause an electrical shock.
Be sure to check the drainage of the indoor unit after the repair.
Faulty drainage can cause the water to enter the room and wet the furniture
and floor.
Icon Type of
Information Description
Note:
Note A “note” provides information that is not indispensable, but may
nevertheless be valuable to the reader, such as tips and tricks.
Caution
Caution A“caution” isused whenthere isdanger thatthereader, through
incorrect manipulation, may damage equipment, loose data, get
an unexpected result or has to restart (part of) a procedure.
Warning
Warning A “warning” is used when there is danger of personal injury.
Reference A “reference” guides the reader to other places in this binder or
in this manual, where he/she will find additional information on a
specific topic.

SiBE05-311
List of Functions 1
Part 1
List of Functions
1. List of Functions......................................................................................2
1.1 Cooling Only............................................................................................2
1.2 Heat Pump...............................................................................................3

List of Functions SiBE05-311
2 List of Functions
1. List of Functions
1.1 Cooling Only
Category Functions
FLKS25·35BVMB RKS25·35BVMB FLK25·35BVMB RK25·35BVMB
Category Functions
FLKS25·35BVMB RKS25·35BVMB FLK25·35BVMB RK25·35BVMB
Basic
Function
Inverter (with Inverter Power Control) 
Health &
Clean
Air Purifying Filter with Bacteriostatic,
Virustatic Functions 
Operation Limit for Cooling (˚CDB) –10
~46 10 ~46
Operation Limit for Heating (˚CWB) — — Photocatalytic Deodorizing Filter —
PAM Control —Air Purifying Filter with Photocatalytic
Deodorizing Function ——
Compressor
Oval Scroll Compressor — — Longlife Filter — —
Swing Compressor  Ultra-Longlife Filter (Option) — —
Rotary Compressor — — Mold Proof Air Filter 
Reluctance DC Motor — Wipe-clean Flat Panel — —
Comfortable
Airflow
Power-Airflow Flap — — Washable Grille — —
Power-Airflow Dual Flaps — — Filter Cleaning Indicator — —
Power-Airflow Diffuser — — Good-Sleep Cooling Operation — —
Wide-Angle Louvers — — Timer 24-Hour On/Off Timer 
Vertical Auto-Swing (Up and Down)  Night Set Mode 
Horizontal Auto-Swing (Right and Left) — —
Worry Free
“Reliability &
Durability”
Auto-Restart (after Power Failure) 
3-D Airflow — — Self-Diagnosis (Digital, LED) Display  
3-Step Airflow (H/P Only) — — Wiring Error Check — —
Comfort
Control
Auto Fan Speed  Anticorrosion Treatment of Outdoor
Heat Exchanger 
Indoor Unit Silent Operation 
Night Quiet Mode (Automatic) — —
Flexibility
Multi-Split / Split Type Compatible
Indoor Unit —
Outdoor Unit Silent Operation (Manual) —
Intelligent Eye — — Flexible Voltage Correspondence 
Quick Warming Function — — High Ceiling Application — —
Hot-Start Function — — Chargeless 10m 10m
Automatic Defrosting — — Power Selection — —
Operation Automatic Operation — —
Remote
Control
5-Rooms Centralized Controller
(Option) 
Programme Dry Function  Remote Control Adaptor
(Normal Open-Pulse Contact)(Option) 
Fan Only 
Lifestyle
Convenience
New Powerful Operation (Non-Inverter) — — Remote Control Adaptor
(Normal Open Contact)(Option) 
Inverter Powerful Operation 
Priority-Room Setting — — DIII-NET Compatible (Adaptor)(Option) 
Cooling / Heating Mode Lock — — Remote
Controller Wireless 
Home Leave Operation  Wired — —
Indoor Unit On/Off Switch 
Signal Reception Indicator 
Temperature Display — —
Another Room Operation — —
Note: : Holding Functions
— : No Functions : Digital Only

SiBE05-311 List of Functions
List of Functions 3
1.2 Heat Pump
Category Functions
FLXS25·35BVMB RXS25·35BVMB FLX25·35BVMB RX25·35BVMB
Category Functions
FLXS25·35BVMB RXS25·35BVMB FLX25·35BVMB RX25·35BVMB
Basic
Function
Inverter (with Inverter Power Control) 
Health &
Clean
Air Purifying Filter with Bacteriostatic,
Virustatic Functions 
Operation Limit for Cooling (˚CDB) –10
~46 10 ~46
Operation Limit for Heating (˚CWB)
–15
~15.5 –10 ~15.5
Photocatalytic Deodorizing Filter —
PAM Control —Air Purifying Filter with Photocatalytic
Deodorizing Function ——
Compressor
Oval Scroll Compressor — — Longlife Filter — —
Swing Compressor  Ultra-Longlife Filter (Option) — —
Rotary Compressor — — Mold Proof Air Filter 
Reluctance DC Motor — Wipe-clean Flat Panel — —
Comfortable
Airflow
Power-Airflow Flap — — Washable Grille — —
Power-Airflow Dual Flaps — — Filter Cleaning Indicator — —
Power-Airflow Diffuser — — Good-Sleep Cooling Operation — —
Wide-Angle Louvers — — Timer 24-Hour On/Off Timer 
Vertical Auto-Swing (Up and Down)  Night Set Mode 
Horizontal Auto-Swing (Right and Left) — —
Worry Free
“Reliability &
Durability”
Auto-Restart (after Power Failure) 
3-D Airflow — — Self-Diagnosis (Digital, LED) Display  
3-Step Airflow (H/P Only) — — Wiring Error Check — —
Comfort
Control
Auto Fan Speed  Anticorrosion Treatment of Outdoor
Heat Exchanger 
Indoor Unit Silent Operation 
Night Quiet Mode (Automatic) — —
Flexibility
Multi-Split / Split Type Compatible
Indoor Unit —
Outdoor Unit Silent Operation (Manual) —
Intelligent Eye — — Flexible Voltage Correspondence 
Quick Warming Function  High Ceiling Application — —
Hot-Start Function  Chargeless 10m 10m
Automatic Defrosting  Power Selection — —
Operation Automatic Operation 
Remote
Control
5-Rooms Centralized Controller
(Option) 
Programme Dry Function  Remote Control Adaptor
(Normal Open-Pulse Contact)(Option) 
Fan Only 
Lifestyle
Convenience
New Powerful Operation (Non-Inverter) — — Remote Control Adaptor
(Normal Open Contact)(Option) 
Inverter Powerful Operation 
Priority-Room Setting — — DIII-NET Compatible (Adaptor)(Option) 
Cooling / Heating Mode Lock — — Remote
Controller Wireless 
Home Leave Operation  Wired — —
Indoor Unit On/Off Switch 
Signal Reception Indicator 
Temperature Display — —
Another Room Operation — —
Note: : Holding Functions
— : No Functions : Digital Only

List of Functions SiBE05-311
4 List of Functions

SiBE05-311
Specifications 5
Part 2
Specifications
1. Specifications..........................................................................................6
1.1 Cooling Only............................................................................................6
1.2 Heat Pump...............................................................................................8

Specifications SiBE05-311
6 Specifications
1. Specifications
1.1 Cooling Only 230V, 50Hz
Notes: MAX. interunit piping length: 25m
MAX. interunit height difference: 15m
Amount of additional charge of refrigerant 20g/m for piping length exceeding 10m
The data are based on the conditions shown in the table below.
Model Indoor Units FLKS25BVMB FLKS35BVMB
Outdoor Units RKS25BVMB RKS35BVMB
Capacity
Rated (Min.~Max.)
kW 2.5 (1.0~3.0) 3.5 (1.0~3.7)
Btu/h 8,550 (3,400~10,250) 11,950 (3,400~12,600)
kcal/h 2,150 (860~2,580) 3,010 (860~3,182)
Moisture Removal L/h 1.2 1.9
Running Current (Rated) A 3.8 5.7
Power Consumption
Rated (Min.~Max.) W 715 (240~925) 1,220 (240~1,300)
Power Factor % 81.8 93.1
COP W/W 3.50 2.87
Piping
Connections
Liquid mm φ 6.4 φ 6.4
Gas mm φ 9.5 φ 9.5
Drain mm φ18.0 φ18.0
Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes
Indoor Unit FLKS25BVMB FLKS35BVMB
Front Panel Color Almond White Almond White
Air Flow Rate m³/min
(cfm)
H 7.6 (268) 8.6 (304)
M 6.8 (240) 7.6 (268)
L 6.0 (212) 6.6 (233)
SL 5.2 (184) 5.6 (198)
Fan Type Sirocco Fan Sirocco Fan Motor Output W 34 34
Speed Steps 5 Steps, Silent and Auto 5 Steps, Silent and Auto
Air Direction Control Right, Left, Horizontal and Downward Right, Left, Horizontal and Downward
Air Filter Removable/Washable/Mildew Proof Removable/Washable/Mildew Proof
Running Current (Rated) A 0.34 0.36
Power Consumption (Rated) W 74 78
Power Factor % 94.6 94.2
Temperature Control Microcomputer Control Microcomputer Control
Dimensions (H×W×D) mm 490×1,050×200 490×1,050×200
Packaged Dimensions(W×D×H) mm 1,100×566×280 1,100×566×280
Weight kg 16 16
Gross Weight kg 22 22
Operation
Sound H/M/L/SL dBA 37 / 34 / 31 / 28 38 / 35 / 32 / 29
Sound Power H dBA 53 54
Outdoor Unit RKS25BVMB RKS35BVMB
Casing Color Ivory White Ivory White
Compressor Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Model 1YC23GXD#A 1YC23GXD#A
Motor Output W 600 600
Refrigerant Oil Type FVC50K FVC50K
Charge L 0.4 0.4
Refrigerant Type R410A R410A
Charge kg 0.96 1.06
Air Flow Rate m³/min (cfm) H 25.3 (893) 25.3 (893)
L 17.0 (600) 17.0 (600)
Fan Type Propeller Propeller
Motor Output W 19 19
Running Current (Rated) A 3.46 5.34
Power Consumption (Rated) W 641 1,142
Power Factor % 80.5 93.0
Starting Current A 3.8 5.7
Dimensions (H×W×D) mm 560×695×265 560×695×265
Packaged Dimensions(H×W×D) mm 797×310×599 797×310×599
Weight kg 37 37
Gross Weight kg 40 40
Operation
Sound H/L dBA 46 / 43 47 / 44
Sound Power H dBA 59 60
Drawing No. 3D040166A 3D040167A
Conversion Formulae
kcal/h=kW×860
Btu/h=kW×3414
cfm=m³/min×35.3
Cooling Piping Length
Indoor ; 27˚CDB/19˚CWB
Outdoor ; 35˚CDB/24˚CWB 7.5m

SiBE05-311 Specifications
Specifications 7
230V, 50Hz
Notes: MAX. interunit piping length: 25m
MAX. interunit height difference: 15m
Amount of additional charge of refrigerant 20g/m for piping length exceeding 10m
The data are based on the conditions shown in the table below.
Models Indoor Units FLK25BVMB FLK35BVMB
Outdoor Units RK25BVMB RK35BVMB
Capacity
Rated (Min.~Max.)
kW 2.5 (1.3~3.0) 3.43 (1.4~3.8)
Btu/h 8,550 (4,450~10,250) 11,700 (4,450~13,000)
kcal/h 2,150 (1,120~2,580) 2,950 (1,120~3,270)
Moisture Removal L/h 1.2 1.9
Running Current (Rated) A 4.2 5.9
Power Consumption
Rated (Min.~Max.) W 890 (430~1,250) 1,315 (500~1,720)
Power Factor % 92.1 96.9
COP (Rated) W/W 2.81 2.61
Piping
Connections
Liquid mm φ 6.4 φ 6.4
Gas mm φ 9.5 φ 9.5
Drain mm φ18.0 φ18.0
Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes
Indoor Unit FLK25BVMB FLK35BVMB
Front Panel Color Almond White Almond White
Air Flow Rate m³/min
(cfm)
H 7.6 (269) 8.7 (307)
M 6.8 (240) 7.7 (272)
L 6.0 (212) 6.6 (233)
Fan Type Sirocco Fan Sirocco Fan Motor Output W 34 34
Speed Steps 5 Steps and Auto 5 Steps and Auto
Air Direction Control Right, Left, Horizontal and Downward Right, Left, Horizontal and Downward
Air Filter Removable / Washable / Mildew Proof Removable / Washable / Mildew Proof
Running Current (Rated) A 0.32 0.36
Power Consumption (Rated) W 70 78
Power Factor % 95.1 94.2
Temperature Control Microcomputer Control Microcomputer Control
Dimensions (H×W×D) mm 490×1,050×200 490×1,050×200
Packaged Dimensions (W×D×H) mm 1,100×566×280 1,100×566×280
Weight kg 16 16
Gross Weight kg 22 22
Operation
Sound H/M/L dBA 37 / 34 / 31 38 / 35 / 32
Sound Power dBA H 53 54
Outdoor Unit RK25BVMB RK35BVMB
Casing Color Ivory White Ivory White
Compressor Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Model 1YC23KXA#A 1YC23KXA#A
Motor Output W 600 600
Refrigerant
Oil Type FVC50K FVC50K
Charge L 0.43 0.43
Refrigerant Type R410A R410A
Charge kg 0.79 0.96
Air Flow Rate m³/min 29.0 27.5
cfm 1,025 972
Fan Type Propeller Propeller
Motor Output W 25 25
Running Current (Rated) A 3.88 5.54
Power Consumption (Rated) W 820 1,237
Power Factor % 91.9 97.1
Starting Current A 4.2 5.9
Dimensions (H×W×D) mm 560×695×265 560×695×265
Packaged Dimensions (W×D×H) mm 797×310×599 797×310×599
Weight kg 34 37
Gross Weight kg 37 40
Operation Sound dBA 46 47
Sound Power dBA H 59 60
Drawing No. 3D039753B 3D039754B
Conversion Formulae
kcal/h=kW×860
Btu/h=kW×3414
cfm=m³/min×35.3
Cooling Piping Length
Indoor ; 27˚CDB/19˚CWB
Outdoor ; 35˚CDB/24˚CWB 7.5m

Specifications SiBE05-311
8 Specifications
1.2 Heat Pump 230V, 50Hz
Notes: MAX. interunit piping length: 20m
MAX. interunit height difference: 15m
Amount of additional charge of refrigerant 20g/m for piping length exceeding 10m
The data are based on the conditions shown in the table below.
Models Indoor Units FLXS25BVMB FLXS35BVMB
Outdoor Units RXS25BVMB RXS35BVMB
Cooling Heating Cooling Heating
Capacity
Rated (Min.~Max.)
kW 2.5 (1.0~3.0) 3.4 (1.0~5.0) 3.5 (1.0~3.7) 4.5 (1.0~5.0)
Btu/h 8,550 (3,400~10,250) 11,600 (3,400~17,050) 11,950 (3,400~12,600) 15,350 (3,400~17,050)
kcal/h 2,150 (860~2,580) 2,920 (860~4,300) 3,010 (860~3,180) 3,870 (860~4,300)
Moisture Removal L/h 1.2 — 1.9 —
Running Current (Rated) A 3.8 4.5 5.7 6.3
Power Consumption
Rated (Min.~Max.) W 715 (240~925) 940 (240~1,430) 1,220 (240~1,300) 1,380 (240~1,830)
Power Factor % 81.8 90.8 93.1 95.2
COP (Rated) W/W 3.50 3.62 2.87 3.26
Piping
Connections
Liquid mm φ 6.4 φ 6.4
Gas mm φ 9.5 φ 9.5
Drain mm φ18.0 φ18.0
Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes
Indoor Units FLXS25BVMB FLXS35BVMB
Front Panel Color Almond White Almond White
Air Flow Rate m³/min
(cfm)
H 7.6 (268) 9.2 (325) 8.6 (304) 9.8 (346)
M 6.8 (240) 8.3 (293) 7.6 (268) 8.9 (314)
L 6.0 (212) 7.4 (261) 6.6 (233) 8.0 (282)
SL 5.2 (184) 6.6 (233) 5.6 (198) 7.2 (254)
Fan Type Sirocco Fan Sirocco Fan Motor Output W 34 34
Speed Steps 5 Steps, Silent and Auto 5 Steps, Silent and Auto
Air Direction Control Right, Left, Horizontal and Downward Right, Left, Horizontal and Downward
Air Filter Removable / Washable / Mildew Proof Removable / Washable / Mildew Proof
Running Current (Rated) A 0.32 0.34 0.36 0.36
Power Consumption (Rated) W 70 74 78 78
Power Factor % 95.1 94.6 94.2 94.2
Temperature Control Microcomputer Control Microcomputer Control
Dimensions (H×W×D) mm 490×1,050×200 490×1,050×200
Packaged Dimensions (W×D×H) mm 1,100×566×280 1,100×566×280
Weight kg 16 16
Gross Weight kg 22 22
Operation
Sound H/M/L/SL dBA 37 / 34 / 31 / 28 37 / 34 / 31 / 29 38 / 35 / 32 / 29 39 / 36 / 33 / 30
Sound Power dBA H 53 — 54 —
Outdoor Units RXS25BVMB RXS35BVMB
Casing Color Ivory White Ivory White
Compressor Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Model 1YC23GXD#A 1YC23GXD#A
Motor Output W 600 600
Refrigerant
Oil Type FVC50K FVC50K
Charge L 0.4 0.4
Refrigerant Type R410A R410A
Charge kg 0.96 1.06
Air Flow Rate m³/min (cfm) H 25.3 (893) 22.8 (805) 25.3 (893) 22.8 (805)
L 17.0 (600) 15.3 (540) 17.0 (600) 15.3 (540)
Fan Type Propeller Propeller
Motor Output W 19 19
Running Current (Rated) A 3.48 4.16 5.34 5.94
Power Consumption (Rated) W 645 866 1,142 1,302
Power Factor % 80.6 90.5 93.0 95.3
Starting Current A 4.5 6.3
Dimensions (H×W×D) mm 560×695×265 560×695×265
Packaged Dimensions (W×D×H) mm 797×310×599 797×310×599
Weight kg 37 37
Gross Weight kg 40 40
Operation
Sound H/L dBA 46 / 43 47 / 44 47 / 44 48 / 45
Sound Power dBA H 59 — 60 —
Drawing No. 3D040174A 3D040175A
Conversion Formulae
kcal/h=kW×860
Btu/h=kW×3414
cfm=m³/min×35.3
Cooling Heating Piping Length
Indoor ; 27˚CDB/19˚CWB
Outdoor ; 35˚CDB/24˚CWB Indoor ; 20˚CDB Outdoor ; 7˚CDB/6˚CWB 7.5m

SiBE05-311 Specifications
Specifications 9
230V, 50Hz
Notes: MAX. interunit piping length: 15m
MAX. interunit height difference: 15m
Amount of additional charge of refrigerant 20g/m for piping length exceeding 10m
The data are based on the conditions shown in the table below.
Models Indoor Units FLX25BVMB FLX35BVMB
Outdoor Units RX25BVMB RX35BVMB
Cooling Heating Cooling Heating
Capacity
Rated (Min.~Max.)
kW 2.5 (1.3~3.0) 3.3 (1.3~4.0) 3.43 (1.4~3.8) 4.1 (1.4~5.0)
Btu/h 8,550 (4,450~10,250) 11,300 (4,450~13,650) 11,700 (4,800~13,000) 14,000 (4,800~17,100)
kcal/h 2,150 (1,120~2,580) 2,840 (1,120~3,440) 2,950 (1,200~3,270) 3,530 (1,200~4,300)
Moisture Removal L/h 1.2 — 1.9 —
Running Current (Rated) A 4.2 4.9 5.9 6.0
Power Consumption
Rated (Min.~Max.) W 890 (430~1,250) 1,080 (350~1,350) 1,315 (500~1,720) 1,355 (405~1,900)
Power Factor % 92.1 95.8 96.9 98.2
COP (Rated) W/W 2.81 3.06 2.61 3.03
Piping
Connections
Liquid mm φ 6.4 φ 6.4
Gas mm φ 9.5 φ 9.5
Drain mm φ18.0 φ18.0
Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes
Indoor Units FLX25BVMB FLX35BVMB
Front Panel Color Almond White Almond White
Air Flow Rate m³/min
(cfm)
H 7.6 (269) 9.2 (325) 8.7 (307) 10.0 (353)
M 6.8 (240) 8.3 (293) 7.7 (272) 9.0 (318)
L 6.0 (212) 7.4 (261) 6.6 (233) 8.0 (283)
Fan Type Sirocco Fan Sirocco Fan Motor Output W 34 34
Speed Steps 5 Steps and Auto 5 Steps and Auto
Air Direction Control Right, Left, Horizontal and Downward Right, Left, Horizontal and Downward
Air Filter Removable / Washable / Mildew Proof Removable / Washable / Mildew Proof
Running Current (Rated) A 0.32 0.34 0.36 0.36
Power Consumption (Rated) W 70 74 78 78
Power Factor % 95.1 94.6 94.2 94.2
Temperature Control Microcomputer Control Microcomputer Control
Dimensions (H×W×D) mm 490×1,050×200 490×1,050×200
Packaged Dimensions (W×D×H) mm 1,100×566×280 1,100×566×280
Weight kg 16 16
Gross Weight kg 22 22
Operation
Sound H/M/L dBA 37 / 34 / 31 37 / 34 / 31 38 / 35 / 32 39 / 36 / 33
Sound Power dBA H 55 — 54 —
Outdoor Units RX25BVMB RX35BVMB
Casing Color Ivory White Ivory White
Compressor Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Model 1YC23KXA#A 1YC23KXA#A
Motor Output W 600 600
Refrigerant
Oil Type FVC50K FVC50K
Charge L 0.43 0.43
Refrigerant Type R410A R410A
Charge kg 0.79 0.96
Air Flow Rate m³/min 29.0 25.5 27.5 23.5
cfm 1,025 901 972 830
Fan Type Propeller Propeller
Motor Output W 25 25
Running Current (Rated) A 3.88 4.56 5.54 5.64
Power Consumption (Rated) W 820 1,006 1,237 1,277
Power Factor % 91.9 95.9 97.1 98.4
Starting Current A 4.9 6.0
Dimensions (H×W×D) mm 560×695×265 560×695×265
Packaged Dimensions (W×D×H) mm 797×310×599 797×310×599
Weight kg 34 37
Gross Weight kg 37 40
Operation Sound dBA 46 47 47 48
Sound Power dBA H 59 — 60 —
Drawing No. 3D039759A 3D039760A
Conversion Formulae
kcal/h=kW×860
Btu/h=kW×3414
cfm=m³/min×35.3
Cooling Heating Piping Length
Indoor ; 27˚CDB/19˚CWB
Outdoor ; 35˚CDB/24˚CWB Indoor ; 20˚CDB Outdoor ; 7˚CDB/6˚CWB 7.5m

Specifications SiBE05-311
10 Specifications

SiBE05-311
Printed Circuit Board Connector Wiring Diagram 11
Part 3
Printed Circuit Board
Connector Wiring Diagram
1. Printed Circuit Board Connector Wiring Diagram..................................12
1.1 Indoor Unit.............................................................................................12
1.2 Outdoor Unit..........................................................................................14