Samsung AC026NNNDKH User manual

AIR CONDITIONER CONTENTS
SYSTEM AIR CONDITIONER
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram
6. Wiring Diagram
7. Reference Sheet
AC026NNNDKH
AC035NNNDKH
AC052NNNDKH
AC060NNNDKH
AC071NNNDKH
AC026MXADKH
AC035MXADKH
AC071MXADKH
Mini 4 WAY CASSETTE SERIES
INDOOR UNIT OUTDOOR UNIT
Model : AC026NNNDKH
AC035NNNDKH
AC052NNNDKH
AC060NNNDKH
AC071NNNDKH
AC026MXADKH
AC035MXADKH
AC052MXADKH
AC060MXADKH
AC071MXADKH
AC052MXADKH
AC060MXADKH

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 The Feature of Product................................................................................................................................... 2-1
2-2 Product Specifications (cont.)...................................................................................................................... 2-2
2-2 Product Specifications (cont.)...................................................................................................................... 2-4
2-3 Accessories .......................................................................................................................................................... 2-5
3. Disassembly and Reassembly.................................................................... 3-1
3-1 Indoor unit........................................................................................................................................................... 3-2
3-2 Outdoor unit.....................................................................................................................................................3-10
4. Troubleshooting ......................................................................................... 4-1
4-1 Setting an indoor unit address and installation option.................................................................... 4-1
4-1-1 Common steps for setting the addresses and options ........................................................ 4-1
4-1-2 Setting the indoor unit addresses................................................................................................. 4-6
4-1-3 Setting the installation options in a batch................................................................................. 4-7
4-1-4 Changing the addresses and options individually................................................................. 4-9
4-2 Items to check before diagnostics...........................................................................................................4-10
4-2-1 Four directions cassette type........................................................................................................4-10
4-2-2 Test run mode and View mode....................................................................................................4-11
4-2-3 Troubleshooting for outdoor unit...............................................................................................4-12
4-2-4 Wired remote controller..................................................................................................................4-14
4-3 Troubleshooting by symptoms.................................................................................................................4-16
4-3-1 Indoor temperature sensor (open/short).................................................................................4-16
4-3-2 Indoor heat exchanger temperature sensor (open/short)................................................4-17
4-3-3 Indoor FAN error.................................................................................................................................4-18
4-3-4 Communication error after finishing Tracking.......................................................................4-19
4-3-5 Indoor unit float sensor error ........................................................................................................4-20
4-3-6 EEPROM circuit failure......................................................................................................................4-21
4-3-7 Outdoor unit is not powered on – Initial diagnosis ............................................................4-22
4-4 Troubleshooting by symptoms ................................................................................................................4-24
4-4-1 Communication error ......................................................................................................................4-24

Samsung Electronics 3
4-4-2 Outdoor temperature sensor error ............................................................................................4-25
4-4-3 Outdoor Coil temperature sensor error ..................................................................................4-27
4-4-4 Outdoor Discharge temperature sensor error.......................................................................4-29
4-4-5 Outdoor Discharge over temperature error ...........................................................................4-31
4-4-6 Outdoor Fan motor error................................................................................................................4-32
4-4-7 Compressor starting error ..............................................................................................................4-33
4-4-8 Compressor wire missing error/rotation error.......................................................................4-34
4-4-9 O.C(Over Current) error ...................................................................................................................4-35
4-4-10 DC_link voltage sensor error.......................................................................................................4-36
4-4-11 DC_link voltage under/over error,
Over voltage protection error/PFC over load......................................................................4-37
4-4-12 DC_link voltage sensor error.......................................................................................................4-38
4-4-13 Current sensor error/Input current sensor error.................................................................4-39
4-4-14 Heatsink sensor error/Heatsink over heat.............................................................................4-40
4-4-15 Comp Vlimit error/Comp current limit error ........................................................................4-41
4-4-16 EEPROM error/OTP error...............................................................................................................4-42
4-4-17 AC zero cross signal error.............................................................................................................4-43
4-4-18 Operation condition secession error.......................................................................................4-44
4-4-19 Capacity miss match error ...........................................................................................................4-45
4-4-20 Gas leak error.....................................................................................................................................4-46
4-4-21
MDS Error Flow chart .....................................................................................................................4-47
5. PCB Diagram................................................................................................ 5-1
5-1 Indoor Unit........................................................................................................................................................... 5-1
5-1-1 MAIN PBA ................................................................................................................................................ 5-1
5-1-2 Display PBA............................................................................................................................................. 5-3
5-2 Outdoor Unit....................................................................................................................................................... 5-4
5-2-1 MAIN PBA ................................................................................................................................................ 5-4
5-2-2 Display PBA............................................................................................................................................. 5-6
6. Wiring Diagram........................................................................................... 6-1
6-1 Indoor Unit........................................................................................................................................................... 6-1
6-2 Outdoor Unit....................................................................................................................................................... 6-2
7. Preference Sheet......................................................................................... 7-1
7-1 Index of Model Name...................................................................................................................................... 7-1
7-2 Refrigerating Cycle Diagram ........................................................................................................................ 7-3
7-3 Pressure Graph................................................................................................................................................... 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, or audio.
– 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.

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 power switch 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 heavy weight 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.
■ C onnect 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 or water.
■ Unplug the power cable or turn off the auxiliary power switch for electric part replacement and repair service.
– 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 compressor must be stopped before removing connecting pipes
for pump down work. Operating the compressor while the service valve is open and coolant pipe is not properly connected
may cause explosion or injury due to abnormal high pressure created inside the coolant 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
■Built-in Cassette Type
After installed, the air conditioner can be harmonized with a room interior.
■High Performance & Energy Saving
With the advanced BLDC inverter technology, it makes a room cool with highly energy saving and arises the efficiency of
air conditioner.
■Long Ambient Operation(In Low Temperature)
It can arise the reliability and the capacity of the air conditioner, especially operated in low temperature.
■Eco-friendly Product(Lead-Free, RoHS, WEEE)
■Easy installation of ultra-lightweight indoor unit
2. Product Specifications
2-1 The Feature of Product

2-2 Samsung Electronics
2-2 Product Specifications (cont.)
ITEM
Development Model
AC026NNNDKH
AC026MXADKH
AC035NNNDKH
AC035MXADKH
IMAGE
INDOOR UNIT
OUTDOOR UNIT
REMOTE CONTROLLER
Performance Cooling [W]
2,600 3,500
Heating [W] 3,400 4,000
Power
Consumption
Cooling [W]
680 1,090
Heating [W] 900 1,200
Voltage / Frequency 1Φ, 220~240V, 50Hz 1Φ, 220~240V, 50Hz
Operating
Current
Cooling [A]
3.8 5.6
Heating [A] 4.8 5.8
Noise Indoor Unit [dBA] (C/H)
38/39 41/42
Outdoor Unit [dBA] (C/H) 51/51 53/53
Size
Net Dimension
(WxDxH)
Indoor Unit [mm]
575*575*250 575*575*250
Outdoor Unit [mm] 790*285*548 790*285*548
Shipping
Dimension
(WxDxH)
Indoor Unit [mm]
623*653*298 623*653*298
Outdoor Unit [mm] 926*384*640 926*384*640
Weight
Net Weight Indoor Unit [kg]
11.4 11.4
Outdoor Unit [kg] 32.8 32.8
Shipping
Weight
Indoor Unit [kg]
13.7 13.7
Outdoor Unit [kg] 35.8 35.8
Harness
Specifications
Indoor Fan Motor
DB31-00578C DB31-00578C
Compressor UG9AJ3090FER UG9AJ3090FER
Outdoor Fan Motor DB31-00642B DB31-00642B
Piping High Pressure
4.1 4.1
Low Pressure 1.4 1.4
PANEL PC4SUFMAN PC4SUFMAN
Refrigerant Type R-410A R-410A
Factory Charging [g] 1,050 1,050
Additional Refrigerant (for every 1m) [g] Chargeless Chargeless
Basic Piping Length [m] 5 5
Max. Piping Length [m] 20 20
Max. Level Difference [m] 15 15
Option Code
01507F-1910C8-271A22-370000
020000-100001-200000-300000
030000-100000-200000-300000
01507F-1930F9-272328-370000
020000-100001-200000-300000
030000-100000-200000-300000

Samsung Electronics 2-3
ITEM
Development Model
AC052NNNDKH
AC052MXADKH
AC060NNNDKH
AC060MXADKH
IMAGE
INDOOR UNIT
OUTDOOR UNIT
REMOTE CONTROLLER
Performance Cooling [W]
5,000 5,800
Heating [W] 5,500 7,000
Power
Consumption
Cooling [W]
1,530 2,150
Heating [W] 1,520 2,320
Voltage / Frequency 1Φ, 220~240V, 50Hz 1Φ, 220~240V, 50Hz
Operating
Current
Cooling [A]
6.9 9.3
Heating [A] 6.9 10
Noise Indoor Unit [dBA] (C/H)
43/44 45/46
Outdoor Unit [dBA] (C/H) 58/58 58/58
Size
Net Dimension
(WxHxD)
Indoor Unit [mm]
575*575*250 575*575*250
Outdoor Unit [mm] 880*310*638 880*310*638
Shipping
Dimension
(WxHxD)
Indoor Unit [mm]
623*653*298 623*653*298
Outdoor Unit [mm] 1024*413*730 1024*413*730
Weight
Net Weight Indoor Unit [kg]
11.4 11.4
Outdoor Unit [kg] 43.8 43.8
Shipping Weight Indoor Unit [kg]
13.7 13.7
Outdoor Unit [kg] 47.5 47.5
Harness
Specifications
Indoor Fan Motor
DB31-00578C DB31-00578C
Compressor
UG9TK3150FE4 UG9TK3150FE4
Outdoor Fan Motor DB31-00658D DB31-00658D
Piping High Pressure
4.1 4.1
Low Pressure 1.4 1.4
PANEL PC4SUFMAN PC4SUFMAN
Refrigerant Type R-410A R-410A
Factory Charging [g] 1,300 1,300
Additional Refrigerant (for every 1m) [g] 10 10
Basic Piping Length [m] 5 5
Max. Piping Length [m] 30 30
Max. Level Difference [m] 20 20
Option Code
01507F-19345D-27343C-370040
020000-100001-200000-300000
030000-100000-200000-300000
01507F-19446E-273C46-370040
020000-100001-200000-300000
030000-100000-200000-300000

2-4 Samsung Electronics
2-2 Product Specifications (cont.)
ITEM
Development Model
AC071NNNDKH
AC071MXADKH
IMAGE
INDOOR UNIT
OUTDOOR UNIT
REMOTE CONTROLLER
Performance Cooling [Btu/h]
6,800
Heating [Btu/h] 7,500
Power
Consumption
Cooling [W]
2,720
Heating [W] 2,800
Voltage / Frequency 1Φ, 220~240V, 50Hz
Operating
Current
Cooling [A]
11.8
Heating [A] 12.3
Noise Indoor Unit [dBA] (C/H)
46/46
Outdoor Unit [dBA] (C/H) 60/60
Size
Net Dimension
(WxHxD)
Indoor Unit [mm]
575*575*250
Outdoor Unit [mm] 880*310*798
Shipping
Dimension
(WxHxD)
Indoor Unit [mm]
623*653*298
Outdoor Unit [mm] 1023*413*911
Weight
Net Weight Indoor Unit [kg]
11.4
Outdoor Unit [kg] 43.8
Shipping
Weight
Indoor Unit [kg]
13.7
Outdoor Unit [kg] 47.5
Harness
Specifications
Indoor Fan Motor
DB31-00578C
Compressor UG4T200FUAE4
Outdoor Fan Motor DB31-00658D
Piping High Pressure
4.1
Low Pressure 1.4
PANEL PC4SUFMAN
Refrigerant Type R-410A
Factory Charging [g] 1,500
Additional Refrigerant (for every 1m) [g] 20
Basic Piping Length [m] 5
Max. Piping Length [m] 50
Max. Level Difference [m] 30
Option Code
01507F-194581-274750-370040
020000-100031-200000-300000
030000-100000-200000-300000

Samsung Electronics 2-5
Item Description Code No. Q’ty Remark
Ass'y drain hose DB94-03287A 1
Essential Offer
(Indoor Unit)
Cable-tie DB65-10088C 6
Seal-drain ass'y DB62-11028A 1
Seal-drain ass'y DB62-11028H 1
Seal-drain ass'y DB62-11028J 1
USER MANUAL
INSTALLATION MANUAL
DB68-06489A
DB68-06490A
1
CARD WARRNATY DB68-02596B 1
INSTALLATION MANUAL DB68-05688A 1
Essential Offer (Outdoor
Unit)
Drain Plug
DB67-00477A
1
Rubber Leg DB73-20134A 4
BOLT 6011-003975 4
Essential Offer
(Panel)
INSTALLATION MANUAL DB68-03837A 1
2-3 Accessories

Samsung Electronics 3-1
Item Remarks
+SCREW DRIVER
Adjustable Wrench
(8mm, 10mm, 13mm)
M6, M8 Hex Wrench
■ Necessary Tools
3. Disassembly and Reassembly

3-2 Samsung Electronics
No Parts Procedure Remark
1Panel 1) Pull both hooks and take the grille downward.
Two safety clips are mounted to the front grille
to prevent it from dropping.
2) Detach the safity clip and take up the grille.
3) Remove the 2 fixed screws to remove the
Control-Box Cover. (Use +Screw Driver)
4) Remove the remote control-receiver , blade
conector and humidity sensor wires from the
PBA. (4EA)
5) Push the 4 panel corners and cover downwards
to remove it.
3-1 Indoor unit
■ AC026NNNDKH, AC035NNNDKH, AC052NNNDKH, AC060NNNDKH, AC071NNNDKH

Samsung Electronics 3-3
No Parts Procedure Remark
6) Disassemble the bolts that are assembled with
the indoor unit at the 4 panel corners.
7) Press the Hangers at both sides of the panel
inwards, to remove it from the indoor unit’s
hook.
Remove the panel from the indoor unit.
2
Blade 1) Remove the hinge-blade and blade.
3Display PBA 1) Remove the cover display.
2) Remove the cover PBA from the cover display.

3-4 Samsung Electronics
No Parts Procedure Remark
3) Disconect the conector wire from the PBA.
4
Humidity Sensor 1) Remove the humidity sensor from the panel.
5
Step motor 1) Unscrew 2 screws on cover motor. (Use +Screw
Driver
2) Remove 2 cover motor.
3)
Remove the 2 fixed screws and disassemble the step
motor. (Use +Screw Driver)

Samsung Electronics 3-5
No Parts Procedure Remark
6Control-Box 1) Disconnect the Connector Wire that is
connected to the indoor unit’s PBA
2) Unscrew the 2 fixed screws on both sides of the
Control Box, and disassemble the Control Box
from the indoor unit.(Use +Screw Driver)

3-6 Samsung Electronics
No Parts Procedure Remark
7Bell-Mouth 1) Unscrew the screw fixed on the Bell-Mouth.
(Use +Screw Driver)
2) Push the Bell-Mouth in the direction
opposite to where it’s installed on the
Control-Box to remove it.
8Drain Pan 1) Unscrew the screws on the 4 corners
of the indoor unit. (Use +Screw Driver)
2) Remove the Drain Pan from the indoor unit.

Samsung Electronics 3-7
No Parts Procedure Remark
9Drain Pump
&
Hose
1) Remove the 2 fixed screws and
disconnect the white drainage hose from
the Drain Pump. (Use +Screw Driver)
2) Remove the 2 screws and take the
Drain-Hose out from the indoor unit to
disassemble the transparent Drain-Hose
fixed on the side of the indoor unit.
(Use +Screw Driver)
10 Evap.
Temperature
Sensor
1) Use your hand to remove the temperature
sensor attached to the Evap Pipe along with
the fixing clip.

3-8 Samsung Electronics
No Parts Procedure Remark
11 Fan
&
Motor
1) Turn the hexangular nut attached to the
top of the Fan counterclockwise to remove it.
Take the Fan out of the Motor.
2) Turn the three hexangular nuts on the
Motor counterclockwise to remove the nuts.
Take the Motor Wires attached to these
three locations out with your hands prior to
removing the Motor.
12 Evaporator 1) Remove the screws of the Steel Holder Evaps
that are used to fix the Heat Exchanger, and
then remove it. (Use +Screw Driver)
2) Remove the 2 fixing screws of the Partition
Evap at the Heat Exchanger’s In/Out Pipe.
(Use +Screw Driver)

Samsung Electronics 3-9
No Parts Procedure Remark
3) Remove the screw of the Cover Pipe
that is used to fix the In/Out Pipe.
Remove the In/Out Pipe. (Use +Screw Driver)
4) Remove the Heat Exchanger from the
indoor unit’s cabinet.

3-10 Samsung Electronics
■ AC026MXADKH / AC035MXADKH
No Parts Procedure Remark
1common work You must turn off the Power
before disassembly.
1) loosen 1 pcs screw of cover control,and
detach it.
2) loosen 5 pcs screws on both right and
left cabniet side edges and to detach the
cover-top
3) Loosen 7 screwsfixed to disassemble
cabi-front , and detach it.
CAUTION
3-2 Outdoor unit