Samsung AC026RN1DKG User manual

AIR CONDITIONER CONTENTS
SYSTEM AIR CONDITIONER
SINGLE for Europe (R32, Heat Pump)
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram
6. Wiring Diagram
7. Reference Sheet
Model : AC026RN1DKG
AC035RN1DKG
AC026RNNDKG
AC035RNNDKG
AC052RNNDKG
AC071RNNDKG
AC052RN4DKG
AC071RN4DKG
AC071RN4PKG
AC026RNLDKG
AC035RNLDKG
AC026RXADKG
AC035RXADKG
AC052RXADKG
AC071RXADKG
AC052RNLDKG
AC071RNLDKG
AC035RNMDKG
AC052RNMDKG
AC071RNMDKG
AC026RNADKG
AC035RNADKG
AC052RNADKG
AC071RNADKG
AC052RNCDKG
AC071RNCDKG
INDOOR UNIT OUTDOOR UNIT

Section 0
2Samsung Electronics
Contents
1. Precautions ............................................................................................ 1-1
1-1 Precautions for the Service.......................................................................... 1-1
1-2 Precautions related to static electricity and PL ........................................ 1-1
1-3 Precautions related to product safety........................................................1-2
1-4 Other precautions ........................................................................................1-2
2. Product Specifications..........................................................................2-1
2-1 CAC Single.....................................................................................................2-1
2-2 The Feature of Product................................................................................ 2-2
2-2-1 Features (Wind-Free 1Way CST) .......................................................................... 2-2
2-3 The Feature of Product ............................................................................... 2-3
2-3-1 Features (Wind-Free 4Way CST)..........................................................................2-3
2-4 Features & Benefits..................................................................................... 2-8
2-4-1 4Way Cassette (600 x 600)...................................................................................2-8
2-4-2 4Way Cassette (600 x 600)-Tasteful design, Compact, Lightweight build ....2-8
2-4-3 360 Cassette..........................................................................................................2-10
2-4-4 Slim Duct - Ultra-light, adaptable design....................................................... 2-12
2-4-5 Duct S...................................................................................................................... 2-14
2-4-6 Ceiling Type - Slim yet functional design........................................................ 2-15
2-4-7 Wall Mount Type................................................................................................... 2-16
2-4-8 AR9000, 7000, 5000 Series - Triangular design, powerful cooling ......... 2-17
2-5 Product Specifications.............................................................................. 2-18
2-6 Specifications of optional items .............................................................. 2-26
2-6-1 Accessories.............................................................................................................2-26
3. Disassembly and Reassembly..............................................................3-1
3-1 Indoor unit.................................................................................................... 3-2
3-2 Outdoor unit .............................................................................................. 3-64
4. Troubleshooting....................................................................................4-1
4-1 Setting an indoor unit address and installation option............................4-1
4-1-1 The procedure of setting option........................................................................... 4-1
4-1-2 The procedure of setting option ..........................................................................4-2
4-1-3 Order for Setting Options ....................................................................................4-5
4-1-4 Setting an indoor unit installation option ........................................................4-6
4-1-5 Changing a particular option ...............................................................................4-8
4-1-6 Option code for each model .................................................................................4-9
4-2 Items to check before diagnostics........................................................... 4-10
4-2-1 Test run mode and View mode ..........................................................................4-10
4-2-2 Eco Mode [Power Saving Mode] .......................................................................4-13
4-2-3 Four directions cassette type ............................................................................4-14
4-2-4 Outdoor Unit..........................................................................................................4-16
4-2-5 Wired remote controller.....................................................................................4-18
4-3 Troubleshooting by symptoms.................................................................4-21
4-3-1 Indoor temperature sensor (open/short)........................................................ 4-21
4-3-2 Indoor heat exchanger temperature sensor (open/short)..........................4-22

Section 0
Samsung Electronics 3
Contents
4-3-3 Indoor FAN error.................................................................................................. 4-23
4-3-4 Communication error after finishing Tracking............................................. 4-24
4-3-5 Indoor unit float sensor error ............................................................................4-25
4-3-6 EEPROM circuit failure....................................................................................... 4-26
4-3-7 E407.........................................................................................................................4-27
4-3-8 When the outdoor unit power is not ON
- Initial Diagnosis : 3-phase products ........................................................... 4-28
4-3-9 Indoor/outdoor communication error (1min.) (Error Code : E202)......... 4-32
4-3-10 Communication error between outdoor unit INV ↔MAIN MICOM (1 min.)
(Error Code: E203).............................................................................................. 4-34
4-3-11 Outdoor sensor error (Error Code : E221, E231, E251, E320) ..................... 4-35
4-3-12 Reverse phase / Loss phase detection (3-phase outdoor unit)
(Error Code : E425 )............................................................................................ 4-36
4-3-13 Compressor down due to freezing control (Error Code : E403) ...............4-37
4-3-14 Outdoor unit Fan error (Error Code : E458, E475)..................................... 4-38
4-3-15 Compressor starting error / rotation error (Error Code : E461, E467).... 4-39
4-3-16 Full current error / PFC over-current error (Error Code : E462, E484)....4-41
4-3-17 IPM over current error (Error Code : E464)................................................. 4-42
4-3-18 DC LINK over-current / low-voltage error (Error Code : E466)
H/W DC_Link Over Voltage Error (Error Code : E483)
AC Input Voltage Sensor Error (Error Code : E488) .................................. 4-45
4-3-19 Gas leakage error (Error Code : E554).......................................................... 4-46
4-3-20 Pipe blockage error (Error Code : E422)...................................................... 4-48
4-3-21 Smart install mode was not carried out (Error Code : E508 )................. 4-49
4-3-22 Others ................................................................................................................... 4-51
5. PCB Diagram and Parts List..................................................................5-1
5-1 Indoor Unit ....................................................................................................5-1
5-1-1 MAIN PCB.................................................................................................................. 5-1
5-1-2 Display PCB ............................................................................................................ 5-11
5-1-3 Sub PCB................................................................................................................... 5-14
5-1-4 BLDC PBA ............................................................................................................... 5-15
5-2 Outdoor Unit.............................................................................................. 5-16
5-2-1 MAIN PCB................................................................................................................ 5-16
5-2-2 INVERTER PCB.......................................................................................................5-18
6. Wiring Diagram .....................................................................................6-1
6-1 Indoor Unit ....................................................................................................6-1
6-2 Outdoor unit ................................................................................................ 6-9
7. Reference Sheet ....................................................................................7-1
7-1 Index for Model Name ..................................................................................7-1
7-1-1 Indoor Unit .................................................................................................................7-1
7-1-2 Outdoor Unit............................................................................................................. 7-2
7-1-3 Panel .......................................................................................................................... 7-3
7-2 Refrigerating Cycle Diagram...................................................................... 7-4

Samsung Electronics 1-1
1. Precautions
1-1 Precautions for the Service
• Use the standard parts when replacing the electric parts.
– Confirm the model name, rated voltage, rated current of the electric parts.
• When repairing the equipment, connection of the harness parts must be firm and solid.
– A loose connection may cause noise or other malfunction.
• When assembling and disassembling the equipment while it is laid down, lay it on soft cloth.
– Otherwise it may scratch the back of the exterior of the product.
• Remove dust or dirt completely from the housing block, wiring block and service parts during repair.
– This helps prevent the danger of fire caused by tracking or short circuit.
• Fasten the valve caps of service valves and charging valves of outdoor unit as much as possible using
adjustable wrenches.
• Check the status of the components’ assembly after repair service.
– The status must be the same as before the repair service.
1-2 Precautions related to static electricity and PL
• The PCB power supply block is susceptible to static electricity.
Therefore, care must be taken during repair or measuring while the power is on.
– Wear insulation gloves for PCB repair or measuring.
• Check whether the installation location is at least two meters away from
other electronic products such as TV, video, oraudio.
– Otherwise, the video quality might be degraded or noise might be generated.
• Do not let end users repair the products themselves.
– Unauthorized disassembly might cause electric shock or fire.

Precautions
1-2 Samsung Electronics
1-3 Precautions related to product safety
• Do not pull the power cord and do not touch the power plug or aux powerswitch with wet hands.
– It might cause electric shock or fire.
• A damaged power line or power plug must be replaced to prevent danger.
• Do not bend the power cable with excessive force, and do not place a heavyweight on the case as it might
damage the cable.
– It might cause electric shock or fire.
• Do not use multiple electric outlets.
– This might cause electric shock or fire.
• Connect the ground terminal when necessary.
– You must connect the ground terminal if you determine that there is a danger of electric leakage due to
moisture orwater.
• Unplug the power cable or turn off the auxiliary power switch for electric part replacement and repairservice.
– Otherwise it might cause electric shock.
• Instruct end users to separate the batteries from the remote controllers and store them separately when the
product is not used for long time.
– Otherwise leakage from the dry cell may cause problems with the remote controller.
1-4 Other precautions
• The pipes should have no leaks during installation, and the compressormust be stopped before removing
connecting pipes for pump down work. Operating the compressorwhile the service valve is open and
refrigerant pipe is not properly connected may cause explosion or injury due to abnormal high pressure
created inside the refrigerant cycle as the air can be absorbed through the pipe.
• Pump Down work procedure (When uninstalling the product)
– Turn on the air conditioner, select cooling operation, and run the compressor for more than three minutes.
– Release the high pressure and low pressure valve caps.
– Close the high pressure valve completely using an L-wrench.
– After about two minutes, close the low pressure valve completely.
– Stop running the air conditioner.
– Separate the connecting pipe.

Samsung Electronics 2-1
2. Product Specifications
2-1 CAC Single
■ Stabilizetheatmospherewithbroadtemperatureallowanceandcontrol
Samsung is dedicated to supporting comfortable living and working environments based on the strength of its
technologies. With a single unit, CAC Single delivers reliable comfort and control over multiple areas to ensure
a pleasant atmosphere in any climate.
■ Widetemperatureperformance
No matter how extreme the temperature, the highperforming CAC Single can handle the conditionwithout the
need for an additional unit. Featuring a wide temperature allowance, it can cool in heat of up to 50 and provide
warmth in the freezing cold of -20℃ to ensure a constant and comfortable home environment.
■ Idealcomfortinminutes
The CAC Single digital inverter air conditioner works at maximum capacity at startup. As soon as the tempera-
ture reaches the desired or set temperature, CAC Single performs fine adjustments to cope with any changes.
This means less temperature fluctuation and ideal comfort in a matter of minutes.
■ Versatilepipinginstallation
CAC Single outdoor units offer a selection of pipe directions. The internal pipe connection ports allow four dif-
ferent pipe directions, supporting a neater, more organized-looking unit upon installation.
DIGITAL INVERTER
Non - inverter
Steady Temperature Fluctuation
High Temperature Fluctuation
Uncomfortable
(Energy Loss)
Comfortable
25°C
24°C
23°C
Uncomfortable
(Energy Loss)
TECHNOLOGY

2-2 Samsung Electronics
■ Wind-Freecooling
Comfort wind implementation by Wind-Free cooling.
※ Wind-Free implementation : Still air by the velocity of flow below 0.15m/s.
■ Bigblade
Max. 8m Horizontal reach
※ Blade enlargement about 47% compare to conventional product
※ Reach : 8m (Height 0.6m, Wind speed 0.3m/s) Conventional product (Samsung) : 5m
※ Based on Wind-Free 1Way 7.1kW
■ Evencooling
Even cooling For spacious space
※ Expand the blade angle from 30˚ to 80˚
Conventional product (Samsung) : 40~80 ˚
2-2-1 Features (Wind-Free 1Way CST)
2-2 The Feature of Product
5.5m
0.6m
※ Reach : 5.5m (Height 0.6m, Wind speed 0.3m/s)
Conventional product (Samsung) : 3m
※ Based on Wind-Free 1Way 3.5kW

Product Specifications
Samsung Electronics 2-3
“Energy Saving with Wind-Free Operation”
Wind-Free
Cooling
Normal Cooling
Save
55%
Wind-Free 4Way(600x600)
24dB(A)
“Exremely quiet with Wind-Free Operation ”
40dB(A)
30dB(A)
20dB
(a)
Wind-Free Ex. Of Noise Influence
Wind-Free 4Way
(34~39dB(A)) Library
Whisper
Ticking
Sleep
Interruption
Barely
Influential
(Bedroom Standard
By WHO)
Sound
Sleep
Whispering
Library
Bedroom
Wind-Free 4Way(600X600)
(27~35dB(A))
⇒ Suitable for office, school, library…..
■ Wind-FreeCoolingwithMicroholes
The Wind Free Air conditioner pushes air out through 15,000 micro holes in the panel, producing a dispersed
and gentle flow of air actually defined as “still air” and the key here is all of those holes create a still, cooled
air flow that infiltrates the room gently and softly.
[ Comparision of Room Temp.]
“ Maintain comfort condtion
with Wind-Free cooling “
15,000 Micro Holes
ASHRAE Comfort Zone(23℃~26℃)
Normal
Cooling Set Off
Wind-Free Cooling
20
34
32
30
28
26
24
22
020 40 60 80 100 120 140 160
Room Temp.(℃)
Time (Min)
■ Wind-FreeCoolingwithMicroholes
Conventional 4way
(600X600)
2-3-1 Features (Wind-Free 4Way CST)
2-3 The Feature of Product

Product Specifications
2-4 Samsung Electronics
Features (Wind-Free 4Way CST) (cont.)
■ BigBlade,LongWind
Big and optimized blades enable wider cooling range.
■ SmartComfortOperation
Smart comfort operation enable to maintain optimal room condition automatically by detecting not only tem-
perature but also relative humidity.
Wider Cooling area
Wind-Free 4Way
Conventional 4Way
81㎜Big Blade (26%↑)
Optimized Blade Shape
Normal Cooling Wind-Free Cooling Normal Cooling
If room reachs comfort zone If room get out of comfort zone

Product Specifications
Samsung Electronics 2-5
Features (Wind-Free 4Way CST) (cont.)
■ NewMDSoperation(Option)
New designed Motion Detect enable customized air direction and efficient operation by detecting the location
of people.
■ World’sLightestWeight
Motion Detect
Sensor
Wind
free
cooling
Power
Input
Absence
Cooling
“Direct wind or Indirect wind”
“Wind-Free + OFF Control”
Wind
free
Saving
15%
35%→50%
Energy saving
Indirect wind
Direct wind
120mins 30mins
Stop
Choose
your comfort
1. Wind Direction
2. Energy Saving
※ MDS : Motion Detect Sensor
Conventional
Saving 35%
50mins
Company A
26kg
SAMSUNG
17kg

Product Specifications
2-6 Samsung Electronics
Features (Wind-Free 4Way CST) (cont.)
■ EasyInstallationin4DifferentWays
Freely install anywhere without worrying about direction. (Body and Panel as well)
No Limitation of direction (Both Body & Panel)
735
735
■ NewImprovedDesign
New Stylish and Aesthetic Panel Simple Display
On/Off Defrost Timer Filter

Product Specifications
Samsung Electronics 2-7
Features (Wind-Free 4Way CST) (cont.)
■ ENoBackFlowingDrainWater
Check Valve on the drain pump prevents drain water from reversing
→ Minimize water gathering in Drain Board to prevent rusting
■ EasyMaintenance
Easy Air Flow Blade Cleaning
Company A SAMSUNG
Dirty
Drain Board
Check Valve :
Prevents drain
water from
reversing
Clean
Drain Board

Product Specifications
2-8 Samsung Electronics
2-4 Features & Benefits
■ AddchicflairtoyourinteriordesignwithastylishyetpowerfulACsystem
Samsung’s advanced 4Way Cassette (600 x 600) builds on the aesthetic appeal and performance of the stan-
dard 4Way Cassette with an enhanced design. The 4Way Cassette (600 x 600) comes in a variety of patterns to
complement any interior. The stylish cassette unit visually harmonizes with the indoor space, while efficient
cooling and heating performance make it a dependable and practical air conditioning solution. The 4Way
Cassette (600 x 600) indoor air conditioning system provides high-performance heating and cooling in an
elegant design with features such as:
• Tasteful design and compact, lightweight build.
Create a polished ambiance with a discreetly sized design and a choice of attractive panel patterns.
• Enhanced comfort control.
Optimize comfort and save energy with optional motion detection.
• Low maintenance and powerful airflow.
Ease installation and maintenance and maximize airflow with an efficient design and robust performance.
■ Refinetheinteriorwithanelegant,compactdesign
The enhanced Samsung 4Way Cassette (600 x 600) indoor air conditioner features a selection of simple panel
patterns to blend seamlessly into any interior design. Its uniquely lightweight frame blends effortlessly and
beautifully into any décor, while clever blade construction keeps the unit clean for a tidyappearance.
■ Attractivepanelanddisplay
The 4Way Cassette (600 x 600) features a fashionable panel with a simple, beveled corner design. The rounded
panel frame promotes a neat, tidy look for an aesthetic flair that blends perfectly with any ambience.
2-4-1 4Way Cassette (600 x 600)
2-4-2 4Way Cassette (600 x 600) - Tasteful design, Compact, Lightweight build
Wafe Pattern Classic Pattern

Product Specifications
Samsung Electronics 2-9
■ Ultra-compactsize
Samsung's 4Way Cassette (600 x 600) air conditioner can be installed on a single standard ceiling tile (600W x
600D) which helps minimize installation time and effort.
■ Light,robustdesign
The Samsung 4Way Cassette (600 x 600) indoor unit is now lighter in weight at 11kg. It is the lightest indoor
unit in the industry, about 35 percent lighter than our conventional products.
17kg11kg
4Way Casseette S (Interior) Conventional

Product Specifications
2-10 Samsung Electronics
■ Allroundcoolingandcomfort
The Samsung 360 Cassette air conditioner offers a brand new way of staying comfortably cool in every corner
of the room. Its innovative circular design not only means it perfectly fits in everywhere, adding a sophisticated
look to many different sites, but it also blows cool air in all directions, so that the whole room is the same tem-
perature*. And its bladeless outlet ensures that cool air is gently dispersed, without creating a cold draft**,
and doesn’t block the air flow, even at low angles, so it expels 25% more air* and spreads it farther.
■ EVENLYCIRCULATES&COOLSEVERYCORNER
Unike 4-way, cassette type air conditioners that create areas of uneven airflow where cool air can't reach*, a
circular outlet blows cool air in all directions, so every corner of a room is the same temperature**.
* Samsung testing compared to a general 4 way cassette type air conditioner.
** Within an 9.3m radius the temperature difference is less than 0.6°C.
■ Comfortablycool,notcold
A bladeless design softly disperses cool air across the room, making you comfortably cool without feeling a
cold draft**. With no blades to block the air flow, it also expels 25% more air* and spreads it farther.
2-4-3 360 Cassette
360 CassetteConventional
* Within an 9.3m radius the temperature difference is less than 0.6°C.
* Within a 5m radius, no cold draft between 0~1.5m in height (with 14.0kw).

Product Specifications
Samsung Electronics 2-11
■ Circulartoperfectlyfitineverywhere
Its innovative circular design can match a multitude of interior designs, so it perfectly fits in everywhere. Its
minimalist modern styling creates a sophisticated look and its circular shape stands out beautifully.
■ Spreadsmoreairinmoreways
An innovative Booster Fan enables cool air to be expelled at much lower angles. It creates a low pressure area
around the outlet, so that cool air comes out parallel to the ceiling and disperses across a wider area.
■ Allroundsimpler&intuitivecontrol
Intuitively control its performance and see where the air is going. The Wireless Remote Controller's* Jog shut-
tle and button offer a fun way to adjust the air flow and a Circular LED Display shows its direction.

Product Specifications
2-12 Samsung Electronics
■ Temperanyenvironmentwithindustry-bestlightweightdesignandoptimizedairflow
The new Samsung Slim Duct visually blends into the ceiling while providing powerful cool and warm airflow.
It’s also easy to install and maintain in any interior regardless of the surrounding environment with its compact
size and weight—the lightest in the industry.
■ Flexiblesetup
The air inlet can be set up either on the bottom or rear of the unit, giving users greater flexibility in installation.
■ Simpledrainpumpinstallation
The new drain pump in the Slim Duct unit can be installed from the side by simply removing the right side
panel. Users no longer need to disassemble the top cover to install, check or repair the drain pump for maxi-
mum convenience.
2-4-4 Slim Duct - Ultra-light, adaptable design
Bottom SideAirInletRearSideAir Inlet
TEX
TEX
Suction Duct
Suction Duct
Diffuser Diffuser

Product Specifications
Samsung Electronics 2-13
■ Variousinstallationoptions
Slim Duct S adopts an ultra-compact, slim size with its thin width, which is 200 mm narrower than convention-
al products. This slender build enables flexible installation and maintenance in various environments..
■ World’slightestweight
The efficient Slim Duct S is the lightest duct air conditioning unit on the market. At a weight that’s 15 percent
lighter than conventional units, Slim Duct S offers the best in convenient installation and maintenance.
■ Easyaccess,easymaintenance
Slim Duct features a flexible design that enables users to easily access its parts to maintain the unit.
900mm
700mm 200mm
Narrower

Product Specifications
2-14 Samsung Electronics
■ Overview
Samsung Ducted Type air conditioning units are a smart solution for low-maintenance, consistent cooling and
heating performance in any environment. Their compact, slim frame blends seamlessly into ceilings, enhanc-
ing the beauty of the interior space and affording users more flexible installation options. Offering a compre-
hensive lineup, Samsung Ducted Type air conditioning units offer just the right solution for every need--from
the office or shop to the restaurant kitchen.
■ Experienceperformanceandconvenientcomfortforanyweathercondition
Samsung Duct S delivers unparalleled cooling and heating and flexible management with customizable com-
fort settings in any climate—all year round. Plus, it boasts a slim, compact size and multiple access points for
easy setup exactly where needed.
■ Smartpressurecontrol
Samsung Ducted Type units feature a smart pressure control system. This system adjusts the fan speed based
on the external static pressure (ESP), delivering consistent cooling and heating power, regardless of the sur-
rounding environment.
■ Convenientinstallation
The optional lift-up drain pump lifts condensed water up to 750 mm, compared to a limit of 700 mm on con-
ventional models, for flexible and convenient installation.
The Duct S indoor air conditioning unit delivers smooth, consistent operation and convenience with features
such as:
• Efficient operation. Stage the desired atmosphere with energy-efficient performance and customized airflow.
• Smart management. Cool spaces efficiently and manage the air conditioning unit even while away, with
features designed for efficiency and control.
• Easy, flexible setup. Install and maintain even multiple units with a compact and easily accessible design.
2-4-5 Duct S

Product Specifications
Samsung Electronics 2-15
■ Distributerefreshingairflowwhereneededwithacompact,flexibledesign
Samsung’s Ceiling Type indoor unit has 2-way installation options for the ceiling and floor, enabling more effi-
cient use of available space. Users can enjoy crisp, powerful air throughout their entire space from the compact
unit in the ceiling or floor.
■ Smallpackage,bigperformance
The Samsung Ceiling Type air conditioner boasts a slim, compact design—half the size of conventional
proucts—with cooling power comparable to larger units.
2-4-6 Ceiling Type - Slim yet functional design
WeightSize
Smaller
100% 100%
200%
136%
118%
123% Lighter
7.1kW Model