Samsung AC024KNZDCH/AA, AC042KNZDCH/AA, AC030KNZDCH/AA, AC036KNZDCH/AA, AC048KNZDCH/AA Service Manual

AHU SERIES CONTENTS

SYSTEM AIR CONDITIONER

AHU SERIES

1. Precautions

2. Product Specifications

3. Disassembly and Reassembly

4. Troubleshooting

5. PCB Diagram and Part List

6. Wiring Diagram

7. Reference Sheet

INDOOR UNIT OUTDOOR UNIT

Model :

AC018KNZDCH/AA
AC024KNZDCH/AA
AC030KNZDCH/AA
AC036KNZDCH/AA
AC042KNZDCH/AA
AC048KNZDCH/AA
AC054KNZDCH/AA

AC018JXADCH/AA
AC024JXADCH/AA
AC030JXADCH/AA
AC036JXADCH/AA
AC042JXADCH/AA
AC048JXADCH/AA
AC054KXADCH/AA

Section 0

Samsung Electronics 1

Contents

1. Precautions ........................................................................................................ 1-1

1-1 Precautions for the Service.............................................................................................................................. 1-1

1-2 Precautions for the Static Electricity and PL ............................................................................................. 1-1

1-3 Precautions for the Safety ................................................................................................................................ 1-1

1-4 Other ........................................................................................................................................................................ 1-2

2. Product Specifications ...................................................................................... 2-1

2-1 The Feature of Product ..................................................................................................................................... 2-1

2-2 Product Specifications ...................................................................................................................................... 2-2

2-3 Specifications of optional items .................................................................................................................... 2-4

2-3-1 Accessories ................................................................................................................................................. 2-4

3. Disassembly and Reassembly .......................................................................... 3-1

3-1 Indoor unit ..................................................................................................................................................... 3-2

3-2 Outdoor Unit ................................................................................................................................................. 3-7

4. Troubleshooting ............................................................................................... 4-1

4-1 Indoor Display Error and Check Method ................................................................................................... 4-1

4-1-1 Indoor unit LED lamp display at error detecting ........................................................................ 4-1

4-1-2 Wired Remocon Error Display ............................................................................................................ 4-2

4-2 Troubleshooting by symptoms ..................................................................................................................... 4-4

4-2-1 Indoor temperature sensor (open/short) ...................................................................................... 4-4

4-2-2 Eva in and out sensor (open/short) .................................................................................................. 4-5

4-2-3 Fan error ...................................................................................................................................................... 4-13

4-2-4 Terminal Block's Terminal Fuse(Open) ........................................................................................... 4-14

4-2-5 Outdoor's service valve(Clog)

4-2-6 EEPROM error

4-2-7 Option error

4-3 Setting the indoor unit option code ........................................................................................................... 4-12

4-3-1 Setting an indoor unit address and installation option .......................................................... 4-12

4-4 Items to be checked first .................................................................................................................................. 4-23

5. PCB Diagram and Parts List.............................................................................. 5-1

5-1 Indoor Unit ............................................................................................................................................................. 5-1

5-1-1 MAIN PCB Diagram ................................................................................................................................. 5-1

5-2 Outdoor Unit ......................................................................................................................................................... 5-3

5-2-1 MAIN PCB .................................................................................................................................................... 5-3

5-2-2 SUB PCB ....................................................................................................................................................... 5-5

5-2-3 MAIN PCB .................................................................................................................................................... 5-6

5-2-4 INVERTER PCB ........................................................................................................................................... 5-7

5-2-5 EMI PCB........................................................................................................................................................ 5-9

2 Samsung Electronics

Contents

6. Wiring Diagram ................................................................................................. 6-1

6-1 Indoor Unit ............................................................................................................................................................. 6-1

6-2 Outdoor Unit ......................................................................................................................................................... 6-3

7. Reference Sheet ................................................................................................ 7-1

7-1 Refrigerating Cycle Diagram .......................................................................................................................... 7-1

7-2 Index of Model Name ........................................................................................................................................ 7-2

7-2-1 Indoor Unit ................................................................................................................................................. 7-2

7-2-2 Outdoor Unit ............................................................................................................................................. 7-3

Samsung Electronics 1-1

1-1 Precautions for the Service

ƒ Use the standard parts when replacing the electric parts.

– Confirm the model name, rated voltage, rated current of the electric parts.

ƒ Repair the disconnection of HARNESS securely when repairing the break down.

– If there is any connection error, it causes an abnormal noise and incorrect operation.

ƒ In case that you assemble or disassemble the products with laying it on the side, do work on the work cloth.

– If not, the exterior of products can be scratched.

ƒ Remove dust and foreign materials from harness, connection part, and inspection part thoroughly when repairing the break down.

– It protects the danger of fire such as tracking and short.

ƒ Tighten tightly the service valve of outdoor unit and the cap of charging valve with a monkey spanner.

ƒ Check the assembly status of parts after repairing the break down.

– It should be same as the status before repairing.

1-2 Precautions for the Static Electricity and PL

ƒ As the PCB power terminal has a weakness for the static electricity, pay attention to it during the repair and measurement.

– Work with insulation gloves during the repair and measurement of PCB.

ƒ Check the distance between the product and the other electronic appliances such as TV, video, and audio. It should be over 2m.

– If not, it causes a bad picture quality or a noise.

ƒ Repairing the products by consumer should be strictly prohibited.

– There is a danger of electric shock or fire due to incorrect disassembly.

1-3 Precautions for the Safety

ƒ Do not pull any electric wires and do not touch an auxiliary power switch with a wet hand.

– There is a danger of electric shock or fire.

ƒ In case any wire or power plug has been damaged, replace it to eliminate any possible danger.

ƒ Do not bend the power cord by force and do not put any heavy object on the power cord.

– There is a danger of electric shock or fire.

ƒ Do not use multi socket.

– There is a danger of electric shock or fire.

ƒ Ground the product if necessary.

– Be sure to ground the product if there is any danger of electric leakage due to water or moisture.

ƒ Be sure to turn off the auxiliary power switch or pull out the power plug during replacement or repair of electric parts.

– There is a danger of electric shock.

ƒ In case the product will not be in use for a long time, the battery of remote control should be kept separately.

– Leakage of inside fluid can cause break down of remote control.

1. Precautions

1-1 Precautions for the Service

Precautions

1-2 Samsung Electronics

1-4 Others

ƒ Never store or load the air conditioner upside down or sideways to prevent the damage to the compressor.

ƒ Young children or infirm persons should be always supervised when they use the air conditioner.

ƒ Max current is measured according to IEC standard for safety.

ƒ Current is measured according to ISO standard for energy efficiency.

ƒ When installing, make sure there is no leakage. When recovering the refrigerant, ground the compressor first before removing the

connection pipe. If the refrigerant pipe is not properly connected and the compressor works with the service valve open, the pipe
inhales the air and it makes the pressure inside of the refrigerant cycle abnormally high. It may cause explosion and injury.

ƒ Pump Down Procedure (When removing the product)

- Turn on the air conditioner and select Cool mode to run the compressor for 3 minutes.

- Release the valve caps on High and Low pressure side.

- Use L wrench to close the valve on the high pressure side.

- Approximately 2 minutes after, close the valve on the low pressure side.

- Stop operation of the air conditioner.

- Disconnect the pipes.

Samsung Electronics 2-1

2. Product Specifications

2-1 The Feature of Product

Ŷ Built-in Duct Type

After installed, the air conditioner can be harmonized with a room interior.

Ŷ 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.

Ŷ Long Piping (Length & Height)

It can give the benefit to the installers and aries the reliability of the air conditioner.

Ŷ Long Ambient Operation (In Low Temperature)

It can arise the reliability and the capacity of the air conditioner, especially operated in low temperature.

Ŷ Eco-friendly Product (Lead-Free, RoHS, WEEE)

2-2 Samsung Electronics

Product Specifications

Samsung Electronics 2-3

2-2 Product Specifications

ITEM

AC018KNZDCH/AA
AC018JXAD CH/AA

AC024KNZDCH/AA
AC024JX ADCH/AA

AC030KNZDCH/AA
AC030JX ADCH/AA

AC036KNZDCH/AA
AC036JX ADCH/AA

AC042KNZDCH/AA
AC042JX ADCH/A A

AC048KNZDCH/AA
AC048J XADCH/A A

AC054KNZDCH/AA
AC054K XADCH/A A

IMAGE

Indoor Unit

Outdoor Unit

Power Supply

1Φ, 208-230V, 60Hz 1Φ, 208-230V, 60Hz 1Φ, 208-230V, 60Hz 1Φ, 208-230V, 60Hz 1Φ, 208-230V, 60Hz 1Φ, 208-230V, 60Hz 1Φ, 208-230V, 60Hz

Performance Cooling/Heating

Btu/h 18,000 / 20,000 24,000 / 27,000 30,000 / 32,000 36,000 / 40,000 42,000 / 47,000 48,000 / 53,000 54,000 / 60,000

Power Consumption Cooling/Heating

kW 1.60 / 2.00 2.18 / 2.64 2.95 / 2.82 3.16 / 3.62 4.14 / 4.22 5.00 / 4.95 6.72 / 5.80

EER/COP Cooling/Heating

Btu/hW 11.25 / 10 11.01 / 10.23 10.17 / 11.35 11.39 / 11.05 10.14 / 11.14 9.6 / 10.71 8.04 / 10.34

Energy Grade

Energy Grade (C) SEER 20.1 SEER 19.5 SEER 19.6 SEER 19.0 SEER 18.4 SEER 18.0 SEER 17.1
Energy Grade (H) HSPF 10.5 HSPF 11.5 HSPF 10.4 HSPF 10.2 HSPF 9.6 HSPF 9.7 HSPF 9.0

Operation Current Cooling/Heating

A 7.1 / 8.7 9.8 / 11.6 13.0 / 12.3 14.1 / 15.8 18.0 / 18.3 21.3 / 21.6 28.7 / 24.7

Noise

(Cooling / Heating)

Indoor Unit

dBA 38 / 38 41 / 41 41 / 41 42 / 42 42 / 42 43 / 43 45 / 45

Outdoor Unit

dBA 48 / 48 50 / 50 50 / 52 49 / 51 51 / 53 53 / 55 56 / 56

Size

Net Dimension

(WxHxD)

Indoor Unit

mm 445 x 1,092 x 533 445 x 1,092 x 533 533 x 1,219 x 533 533 x 1,219 x 533 622 x 1,492 x 552 622 x 1,492 x 552 622 x 1,492 x 552

Outdoor Unit

mm 880 x 638 x 310 94 0 x 998 x 330 940 x 998 x 330 9 40 x 1,210 x 330 940 x 1,210 x 330 940 x 1,210 x 330 940 x 1420 x 330

Shipping

Dimension

(WxHxD)

Indoor Unit

mm 493 x 1,135 x 665 493 x 1,135 x 665 590 x 1,305 x 665 590 x 1,305 x 665 676 x 1,588 x 695 676 x 1,588 x 695 676 x 1,588 x 695

Outdoor Unit

mm 1,023 x 730 x 413 995 x 1,096 x 426 995 x 1,096 x 426 995 x 1,388 x 426 995 x 1,388 x 426 995 x 1,388 x 426 995 x 1598 x 426

Weight

Net

Indoor Unit

kg 44. 5 44.5 56.0 56.0 74.0 74.0 74.0

Outdoor Unit

kg 45.0 64.5 70.0 88.0 88.0 88.0 96.0

Shipping

Indoor Unit

kg 49.0 49.0 62.0 62.0 80.0 80.0 80.0

Outdoor Unit

kg 48 .0 69.5 74.0 98.0 98.0 98.0 106.0

Connecting Pi pe

Liquid

mm 6.35 (1/4") 6.35 (1/4") 9. 52 (3/8") 9.52 (3/8") 9.52 (3/8") 9. 52 (3/8") 9.52 (3/8")

Gas

mm 12.7 (1/2") 15.88 (5/8") 15.88 (5/8") 15.88 (5/8") 15.88 (5/8") 15.88 (5/8") 19.05 (3/4")

Refrigerant (R410A)

g 1300 2100 2600 2800 2800 2800 3500

Additional Refrigerant (R410A)

g/m 10 10 22 33 33 33 33

Standard

m 7.5 7.5 7.5 7.5 7.5 7.5 7.5

Extension Length (Maximum)

m 3 0 50 50 75 75 75 75

Extension Length (Elevation)

m 20 30 30 30 30 30 30

Option Code

Product Option

01E06C-105020­27343B-370005

01E06C-105020-274750-

370005

01E06C-105020­275A64-370005

01E06C-105020-276470-

370005

01E06C-105020­277D8C-370005

01E06C-105020­278CA0-370005

01E06C-105020­27A0B4-370005

Installation Option

020000-100000-200000-

300000

020000-100000-200000-

300000

020000-100000-200000-

300000

020000-100000-200000-

300000

020000-100000-200000-

300000

020000-100000-200000-

300000

020000-100000-200000-

300000

2-4 Samsung Electronics

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Installation manual - 1

Essential Offer

(Indoor Unit)

Card Warranty - 1

Cap Drain DB63-10355C 3

Essential Offer
(Outdoor Unit)

Drain Plug DB67-00806A 1

Rubber Leg DB73-20134A 4

Manual Install DB68-05462A 1

2-3 Specifications of optional items

2-3-1 Accessories

Samsung Electronics 3-1

Item Remarks

+SCREW DRIVER

Adjustable Wrench

(8mm, 10mm, 13mm)

M6, M8 Hex Wrench

QNecessary Tools

3. Disassembly and Reassembly

3-2 Samsung Electronics

No Parts Procedure Remark

1 FRONT VIEW 1) Stop the operation of the air conditioner

and disconnect the main power supply.

2 Control-BOX 1) Loosen 11 of the front screw(CCW) and

detach the Cabinet Front Up.

2) Disconnect the Connector Wire that is
connected to the indoor unit's PBA

3) Unscrew the 1 fixed screws on middle of
the PBA and 4 fixed PBA HOLDER, and
disassemble the PBA from the indoor
unit.
(Use + Screw Driver)

3-1 Indoor Unit

QV-AHU

- AC018/024/030/036/042/048/054KNZDCH/AA

Disassembly and Reassembly

Samsung Electronics 3-3

No Parts Procedure Remark

3 DRAIN PAN 1) Loosen 11 of the front screw(CCW) and

detach the Cabinet Front Down.

2) Loosen 2 of the Left side screw(CCW).

3) Loosen 5 of the front screw(CCW) and
detach the 2 Bracket drain and 1 Bracket
Low

4) Pull the Heat Exchanger and Drain.

5) Detach the Drain from indoor Unit.

Disassembly and Reassembly

3-4 Samsung Electronics

No Parts Procedure Remark

4 Heat Exchanger 1) Loosen 11 of the front screw(CCW) and

detach the Cabinet Front Down.

2) Loosen 2 of the Left side screw(CCW).

3) Loosen 5 of the front screw(CCW) and
detach the 2 Bracket drain and 1 Bracket
Low.

4) Disconnect the Connector Wire that is
connected to the Heat Exchanger.

5) Pull the Heat Exchanger and Drain.

6) Detach the Heat Exchanger.

Disassembly and Reassembly

Samsung Electronics 3-5

No Parts Procedure Remark

5 FAN & MOTOR 1) Loosen 11 of the front screw(CCW) and

detach the Cabinet Front Down.

2) Loosen 6 of the Front screw(CCW) and
detach the Bracket.

3) Disconnect the Connector Wire that is
connected to the Motor.

5) Pull the A'ssy Fan Blower.

Disassembly and Reassembly

3-6 Samsung Electronics

No Parts Procedure Remark

6) Loosen 4 of the screw and 1 nut on the
CASE and Detach the motor and fan.

Disassembly and Reassembly

Samsung Electronics 3-7

No Parts Procedure Remark

1 common work 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 screwsxed to disassemble
cabi-front , and detach it.

AC018JXADCH

3-2 Outdoor Unit

Disassembly and Reassembly

3-8 Samsung Electronics

No Parts Procedure Remark

common work 4) loosen 7 screws to disassemble the cabi-

right ,and detach it.

5) loosen 2 screws to disassemble steel-bar.

6) loosen 3 screws to disassemble cabi-left.

Disassembly and Reassembly

Samsung Electronics 3-9

No Parts Procedure Remark

2 fan&motor 1) loosen 1 screw as indication and detached

the fan.

2) loosen 4 pcs motor screws and disconnect
the wire betwwen assy control out and motor.

3) loosen 2 pcs bracket-motor screw and
detach it.

Disassembly and Reassembly

3-10 Samsung Electronics

No Parts Procedure Remark

3 assy control out 1) lossen xing 1 screw from cover -control

2) detach several connections from assy con­trol out, take out assy control out.

4 Heat exchanger 1) Release the refrigerant at rst

2) Looosen xing screw on both side.

3) disaessembly the pipes in both inlet and
outlet with welding torch.

4) detach the heat exchanger.

Disassembly and Reassembly

Samsung Electronics 3-11

No Parts Procedure Remark

5 compressor 1) disconnect the compressor lead wire .

2)disassembly the felt comp sound.

loosen the 3 bolts at the bottom of

Disassembly and Reassembly

3-12 Samsung Electronics

No Parts Procedure Remark

1 Cabi Front RH

You must turn o the Power before

disassembly.

1) Unscrew and remove two mounting screw
in the Cabinet Front RH. (Use +Screw Driver)

2 Cabi Top 1) Unscrew and remove 9 screws

on each side of the Cabinet-Top.
(Use +Screw Driver)

3 Cabi Install Front 1) Unscrew and remove 1 screw

in the Cabinet-Install Front.
(Use +Screw Driver)

AC024JXADCH, AC030JXADCH

Disassembly and Reassembly

Samsung Electronics 3-13

No Parts Procedure Remark

4 Guard Cond 1) Pull the sensor from Guard Cond.

2) Unscrew and remove 4 screws

in the Guard Cond.
(Use +Screw Driver)

5 Cabi Back RH 1) Pull the sensor from Cabi Back RH.

2) Unscrew and remove 4 screws

on each side of the Cabinet Back RH.
(Use +Screw Driver)

Disassembly and Reassembly

3-14 Samsung Electronics

No Parts Procedure Remark

6 Cabi Install Back 1) Unscrew and remove 1 screw

in the Cabinet-Install Back.
(Use +Screw Driver)

7 Cabi Front LF 1) Unscrew and remove 10 screws

in the Cabinet-Front LF.
(Use +Screw Driver)

Disassembly and Reassembly

Samsung Electronics 3-15

No Parts Procedure Remark

8 Fan 1) Turn 2 mounting nuts as shown in the

picture and remove it. (Use Adjustable
Wrench)

Disassembly and Reassembly

3-16 Samsung Electronics

No Parts Procedure Remark

9 Motor 1) Separate the Fan Propeller.

2) Unscrew and remove the 8 Motor mounting

screws. (Use +Screw Driver)

3) Disconnect the Motor wire From

Ass'y Control Out.

10 Bracket Motor 1) Unscrew and remove 2 mounting screws

in Bracket Motor. (Use +Screw Driver)

Disassembly and Reassembly

Samsung Electronics 3-17

No Parts Procedure Remark

11 Control Out 1) Disconnect 4 Connecters From

Ass'y Control Out.

2) Unscrew and remove 1 mounting screw

in Control Out. (Use +Screw Driver)

3) Separate Ass'y Control Out.

Disassembly and Reassembly

3-18 Samsung Electronics

No Parts Procedure Remark

12 Ass'y 4way Valve 1) Purge the Coolant rst.

2) Unscrew and remove 2mounting screws
in muer.

3) Unscrew and remove 2 mounting screws
in Service Valve. (Use +Screw Driver)

4) Separate the pipe from the Entrance/Exit

using a welder.

When removing the compressor,

Heat Exchanger, and Pipe, purge the
Coolant inside the Compressor
completely and remove the pipe
with a welding ame.

Disassembly and Reassembly

Samsung Electronics 3-19

No Parts Procedure Remark

13 Ass;y EEV Valve 1) Unscrew and remove 2 mounting screws

in Service Valve. (Use +Screw Driver)

2) Separate the pipe from the Entrance/Exit

using a welder.

14 Compressor 1) Unscrew and remove 1 mounting nut

in Cover Terminal. (Use Adjustable Wrench)

2) Separate the Compressor Felt Sound.

Disassembly and Reassembly

3-20 Samsung Electronics

No Parts Procedure Remark

3) As shown in the picture, unscrew and

remove 3 mounting screws from the
bottom. (Use Adjustable Wrench)

15 Cond Out 1) Unscrew and remove 3 screws

on each side of the Assy Cond Out.
(Use +Screw Driver)

2) Separate the Compressor Felt Sound.

Disassembly and Reassembly

Samsung Electronics 3-21

No Parts Procedure Remark

1 Cabi Front RH

You must turn o the Power before

disassembly.

1) Unscrew and remove two mounting
screw in the Cabinet Front RH.
(Use +Screw Driver)

2 Cabi Top

1) Unscrew and remove 9 screws
on each side of the Cabinet-Top.
(Use +Screw Driver)

3 Cabi Install Front

1) Unscrew and remove 1 screw
in the Cabinet-Install Front.
(Use +Screw Driver)

4 Guard Cond

1) Pull the sensor from Guard Cond.

2) Unscrew and remove 4 screws
in the Guard Cond.
(Use +Screw Driver)

QAC036JXADCH, AC042JXADCH, AC048JXADCH, AC054KXADCH

Disassembly and Reassembly

3-22 Samsung Electronics

No Parts Procedure Remark

5 Cabi Back RH

1) Pull the sensor from Cabi Back RH.

2) Unscrew and remove 4 screws
on each side of the Cabinet Back RH.
(Use +Screw Driver)

6 Cabi Install Back

1) Unscrew and remove 1 screw
in the Cabinet-Install Back.
(Use +Screw Driver)

7 Cabi Front LF

1) Unscrew and remove 10 screws
in the Cabinet-Front LF.
(Use +Screw Driver)

8 Fan

1) Turn 2 mounting nuts as shown in
the picture and remove it.
(Use Adjustable Wrench)

Disassembly and Reassembly

Samsung Electronics 3-23

No Parts Procedure Remark

9 Motor

1) Separate the Fan Propeller.

2) Unscrew and remove the 8 Motor
mounting
screws. (Use +Screw Driver)

3) Disconnect the Motor wire From
Ass'y Control Out.

10 Bracket Motor

1) Unscrew and remove 2 mounting
screws in Bracket Motor.
(Use +Screw Driver)

11 Control Out

1) Disconnect 4 Connecters From
Ass'y Control Out.

2) Unscrew and remove 1 mounting
screw in Control Out.
(Use +Screw Driver)

3) Separate Ass'y Control Out.

Disassembly and Reassembly

3-24 Samsung Electronics

No Parts Procedure Remark

12 Assy 4way Valve

1) Purge the Coolant rst.

2) Unscrew and remove 2 mounting
screws in Service Valve. (Use +Screw
Driver)

3) Separate the pipe from the

Entrance/Exit using a welder.

When removing the compres­sor, Heat Exchanger, and Pipe,
purge the Coolant inside the
Compressor completely and
remove the pipe with a welding
ame.

13 Assy EEV Valve

1) Unscrew and remove 2 mounting
screws in Service Valve.
(Use +Screw Driver)

2) Separate the pipe from the Entrance/
Exit using a welder.

Samsung Electronics 4-1

4. Troubleshooting

4-1 Indoor Display Error and Check Method

■Error detection and reoperation

 ● If error occurs during the operation, badness is indicated by LED flickering and all operation is stopped except LED.
 ● When reoperating by remote control and switch determine the error mode after normal operation.

4-1-1Indoor unit LED lamp display at error detecting

Abnormal conditions

Indicators

Remarks

Concealed Type

Green Red

Standard Type

Power reset. XXXX

Error of Room sensor in the indoor unit.(Open/Short) X X XX

Error of EVA-IN,EVA-OUT sensor in the indoor unit.
(Open/Short)

X XX

Error of Fan motor in the indoor unit. X X X

X

1. Error of Outdoo.r

2. Thermal Fuse Open Error of Indoor's Terminal Block.

XX

1. Clogging of outdoor's service valve.

2. the refrigerant leakage .

XX

Detection of the float switch. X X X

1. Error of EEPROM.

2. Error of Option setting.

1. Error of Outdoor Temp. sensor.

2. Error of Cond Temp. sensor.

3. Error of discharge Temp. sensor.

XX X

1. No communication for 2 minutes between indoor units
(Communication error for more than 2 minutes)

2. Indoor unit receiving the communication error from
outdoor unit

3. Outdoor unit tracking 3 minutes error

4. When sending the communication error from the out­door unit, the mismatching of the communication num­bers and installed numbers after completion of tracking.
(Communication error for more than 2 minutes)

XX

X

1. Indoor unit error

(Display is unrelated

with operation)

2. Outdoor unit error
(Display is unrelated

with operation)

LED Display on the receiver & display unit

●: On, ◑: Flickering, X : OFF

◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.

Troubleshooting

4-2 Samsung Electronics

4-1-2 Wired Remocon Error Display

- If an error occurs, ( ) is displayed on the wired remote controller.

- If you would like to see an error code, press the Test button.

Error mode Contents Error type

Indoor unit communication error Communication error

Duplicated address setting error Communication error

No response error address from indoor unit Communication error

Indoor temperature sensor (open/short error) Indoor sensor error

Indoor unit Eva In sensor (Open/Short) Indoor sensor error

Indoor/outdoor communication error (1 min) Communication error

Communication error between indoor/outdoor INVlMAIN MICOM (1 min) Communication error

Outdoor temperature sensor error Outdoor sensor error

COND temperature sensor error Outdoor sensor error

[Inverter] Emission temperature sensor error Outdoor sensor error

Detection of Indoor Freezing (when Comp. Stops) Outdoor unit protection control error

Protection of Outdoor Overload (when Comp. Stops) Outdoor unit protection control error

Emission temperature excessively high Outdoor unit protection control error

High pressure blockage error
(Refrigerant completely Leakage error)

Self diagnostic error

Heating operation blocked Self diagnostic error

Cooling operation blocked Self diagnostic error

Outdoor fan 1 error Self diagnostic error

[Inverter] Compressor startup error Outdoor unit protection control error

[Inverter] Total current error/PFC over current error Outdoor unit protection control error

OLP Overheat and Comp. Stop Outdoor unit protection control error

[Inverter] IPM over current error Outdoor unit protection control error

Compressor V limit error Outdoor unit protection control error

DC LINK over/low voltage error Outdoor unit protection control error

Troubleshooting

Samsung Electronics 4-3

Wired remote controller (cont.)

Error mode Contents Error type

[Inverter] Compressor rotation error Outdoor unit protection control error

[Inverter] Current sensor error Outdoor unit protection control error

[Inverter] DC LINK voltage sensor error Outdoor unit protection control error

EEPROM Read/Write error Outdoor unit protection control error

[Inverter] OTP error Outdoor unit protection control error

AC ZERO CROSSING SIGNAL OUT error Outdoor unit protection control error

Compressor LOCK error Outdoor unit protection control error

Outdoor fan 2 error Self diagnostic error

IPM Overheat Error for Outdoor Unit Inverter Comp. Outdoor unit protection control error

Gas leak error Self diagnostic error

Capacities not matched Outdoor unit protection control error

Communication error between the indoor unit and wired remote controller Wired remote controller error

Communication error between the Master and Slave wired remote controllers Wired remote controller error

Do not install the electronic heater in the external supply duct connected to the AHU.

Troubleshooting

4-4 Samsung Electronics

Indoor unit display

X (Operation) X (Defrost) (Timer) X(Fan) X (Filter)

Wire remote controller display

E121

Symptom

Error of Room sensor in the indoor unit(Open/Short)

Failure

Short or leakage of the Room sensor

4-2 Troubleshooting by symptoms

4-2-1 Indoor temperature sensor (open/short)

Yes

No

No

In this case, is the resistance

value out of range in the temperature

table on the right?

Yes

Is indoor temperature

sensor disconnected from the

connector in PCB?

Restart the system after replacing the PCB

Restart the system after connecting

to the PCB connector

Indoor temperature sensor

failure (replace)

Remove the indoor temperature sensor

connector from the PCB and measure the

resistance between two terminals

Current tem­perature (°C)

Resistance

(kΩ)

40 5.800

35 6.900

30 8.300

25 10.00

20 12.10

15 14.70

10 18.00

5 22.00

0 28.30

-5 33.90

-10 42.30

<Temperature sensor

resistance value>

Troubleshooting

Samsung Electronics 4-5

Indoor unit display

(Operation) X (Defrost) (Timer) X(Fan) X (Filter)

Wire remote controller display

E122, E123

Symptom

Error of EVA-IN,EVA-OUT sensor in the indoor unit(Open/Short)

Failure

Short or leakage of the EVA sensor

4-2-2 Eva in and out sensor (open/short)

Yes

No

No

In this case, is the resistance

value out of range in the temperature table

on the right?

Yes

Is the indoor heat exchanger

temperature sensor connector disconnected

from the PCB?

Restart the system after replacing the PCB

Restart the system after

connecting the connector to PCB

Failure of the indoor heat

exchanger temperature sensor

(replace)

Remove the indoor heat exchanger
temperature sensor connector from
the PCB and measure the resistance

between two terminals

Current tem­perature (°C)

Resistance

(kΩ)

40 5.800

35 6.900

30 8.300

25 10.00

20 12.10

15 14.70

10 18.00

5 22.00

0 28.30

-5 33.90

-10 42.30

<Temperature sensor

resistance value>

Troubleshooting

4-6 Samsung Electronics

Indoor unit display

X (Operation) X (Defrost) X(Timer) (Fan) X (Filter)

Wire remote controller display

E154

Symptom

Error of Fan motor in the indoor unit

Failure

Fan error

4-2-3 Fan error

No

No

Yes

Yes

Is the motor connector

disconnected from the PCB?(CN301)

Is there foreign substance

stuck in the motor fan?

Replace the PCB and restart the unit.

Connect the connector to

PCB and restart the unit

Remove the foreign substance

and restart the unit

Troubleshooting

Samsung Electronics 4-7

Indoor unit display

X (Operation) X (Defrost) (Timer) (Fan) (Filter)

Wire remote controller display

E198

Symptom

Error of Terminal Block's Terminal Fuse(Open)

Failure

Fuse open

4-2-4 Terminal Block's Terminal Fuse(Open)

No

No

Yes

Is the resistance 0Ω ?

Yes

Is the wire connector

disconnected from the terminal block and

PCB?(CN140)

Replace the PCB and restart the unit

Connect the connector to

PCB and terminal block before

restart the unit

Replace the Terminal Block and

restart the unit

Remove the wire connector from the PCB
and measure the resistance between two

terminals

Troubleshooting

4-8 Samsung Electronics

Indoor unit display

(Operation) X (Defrost) X (Timer) (Fan) (Filter)

Wire remote controller display

E422

Symptom

Clogging of outdoor's service valve

Failure

Valve clog

4-2-5 Outdoor's service valve(Clog)

Yes

No

Is the outdoor service valve clogging?

Replace the PCB and restart the unit.

Open the outdoor's service valve.

Troubleshooting

Samsung Electronics 4-9

4-2-6 EEPROM error

Indoor unit display

(Operation) (Timer) (Fan) (Filter) (Defrost)

Wire remote controller display

E162

Symptom

EEPROM PCB disconnected from the MAIN PCB

Failure

Option error

Yes

Yes

No

No

Is the EEPROM PCB

disconnected from the MAIN PCB?

(CN201)

Is the error mode disappear ?

Connect the EEPROM PCB to MAIN PCB

The indoor unit work normaly

Connect the EEPROM PCB to

MAIN PCB

and restart the unit

Replace the PCB and

restart the unit

Troubleshooting

4-10 Samsung Electronics

4-2-7 Option error

Indoor unit display

(Operation) (Timer) (Fan) (Filter) (Defrost)

Wire remote controller display

E163

Symptom

EEPROM option setting error

Failure

Option error

Yes

No

Is the error mode disappear ?

Input the right option to EEPROM PCB

The indoor unit work normaly

Replace the PCB and

restart the unit

Troubleshooting

Samsung Electronics 4-11

In order to set the indoor unit option code use the wired remote controller and follow the directions below.

1) Press the

and buttons at the same time for more than 3 seconds and then a Main menu will be

displayed.

2) Press the

/ button to select and then press button to enter a Sub-menu setting screen.

3) Press the

/ button to select and then press button to enter a Indoor unit option code setting

screen.

4) Press the

/

button to set the option code in order. Press button to go to the next page.

5) Press the

button to save and complete the option setting.

6) Press the

button to exit to normal mode.

t Option code will not be applied if you don’t press the
t Setting indoor unit option code is only possible in Master wired remote controller.

You can only check the indoor unit option code in Slave wired remote controller.

t Setting indoor unit option code is possible when one indoor unit is connected. If more than 2

indoor units are connected, you can only check the Master indoor unit option code.

t Press the

button anytime during setup to exit without setting.

NOTE

NOTE

t The first digit represents the page number and the remaining five digits are option codes.
t The option code which is currently setting will icker.

Main Menu

Sub-menu

123 546

Data bit

12 34 56

Option CodePage number

SEG1 SEG2 SEG3 SEG4 SEG5 SEG6

0

77777

Page number

SEG7 SEG8 SEG9 SEG10 SEG11 SEG12

1

77777

Page number

SEG13 SEG14 SEG15 SEG16 SEG17 SEG18

2

77777

Page number

SEG19 SEG20 SEG21 SEG22 SEG23 SEG24

3

77777

Page number

4-3 Setting the indoor unit option code

Troubleshooting

4-12 Samsung Electronics

Set the indoor unit address and installation option with remote controller option. Set the each option
separately since you cannot set the ADDRESS setting and indoor unit installation setting option at the same
time. You need to set twice when setting indoor unit address and installation option.

Setting an indoor unit address

1) Press the and buttons at the same time for more than 3 seconds and then a Main menu will be
displayed.

2) Press the

/ button to select and then press button to enter a Sub-menu setting screen.

3) Press the

/ button to select and then press button to enter a Indoor Address setting screen.

4) Press the

/ button to set the Indoor unit Main/RMC Address.

5) Press the

button to save and complete the option setting.

6) Press the

button to exit to normal mode.

t Press the button anytime during setup to exit without setting.

t Address will not be applied if you don't press

button.

t Setting Main/RMC Address of an Indoor unit is available only with a master wired remote controller.

NOTE

NOTE

t The Main/RMC Address which is currently setting will flicker.
t Data bit 1 and 2 present Indoor unit main address checking
t Data bit 3 and 4 present Indoor unit main address setting(outdoor unit reset is needed to set).

4-3-1 Setting an indoor unit address and installation option

12 34 56

Data bit

Troubleshooting

Samsung Electronics 4-13

Setting an indoor unit installation option

In order to check and set the indoor unit installation option code use the wired remote controller and
follow the directions below.

1) Press the

and buttons at the same time for more than 3 seconds and then a Main menu will be

displayed.

2) Press the

/ button to select and then press button to enter a Sub-menu setting screen.

3) Press the

/ button to select and then press button to enter a Indoor unit installation option

code setting screen.

4) Press the

/ button to set the installation option code in order. Press button to go to the

next page.

SGE1 SGE2 SGE3 SGE4 SGE5 SGE6

0 2 RESERVED

Exterior

temperature

sensor

Central control RESERVED

SEG7 SEG8 SEG9 SEG10 SEG11 SEG12

1 RESERVED RESERVED Use of Heater RESERVED Master / Slave

SEG13 SEG14 SEG15 SEG16 SEG17 SEG18

2 External control

External control

output

RESERVED Buzzer RESERVED

SEG19 SEG20 SEG21 SEG22 SEG23 -

3

Individual control

of a remote

controller

Heating setting



compensation

RESERVED RESERVED -

t The rst digit represents the page number and the remaining ve digits are installation option.
t The total option codes are 24 digits. You can set six digits at a time and it is distinguished by page

number (0, 1, 2, 3).

NOTE

Troubleshooting

4-14 Samsung Electronics

Option No. : 02XXXX-1XXXXX-2XXXXX-3XXXXX

Option SEG1 SEG2 SEG3 SEG4 SEG5 SEG6

Explanation PAGE MODE

RESERVED

Use of external

temperature

sensor

Use of central

control

RESERVED

Indication and Details

Indication Details Indication Details Indication Details Indication Details

02

0 Disuse 0 Disuse

1 Use 1 Use

Option SEG7 SEG8 SEG9 SEG10 SEG11 SEG12

Explanation PAGE Use of drain pump Use of Hot Coil Use of Heater

RESERVED

Master / Slave

Indication and Details

Indication Details

RESERVED RESERVED

Indication Details Indication Details

1

0 Disuse 0 slave

1Use

1 master

--

Option SEG13 SEG14 SEG15 SEG16 SEG17 SEG18

Explanation PA GE

Use of external

control

Setting the

output of external

control

RESERVED

Buzzer control

RESERVED

Indication and Details

Indication Details Indication Details Indication Details Indication D etails

2

0 Disuse 0 Thermo on 0

Use of

buzzer

1

ON/OFF

Control

1

Operation

on

1

Non use

of buzzer

2

OFF

Control

3

WINDOW

ON/OFF

Control

Option SEG19 SEG20 SEG21 SEG22 SEG23 -

Explanation PA GE

control of a remote

controller

Heating setting

compensation

RESERVED RESERVED

-

Indication and Details

Indication Details Indication Details Indication D etails -

3

0 or 1 Indoor 1 0 Disuse

-

2 Indoor 2 1 2°C

3 Indoor 3

2 5°C

4 Indoor 4

5. Press the button to save and complete the option setting.

6. Press the

button to exit to normal mode.

t Press button anytime during setup to exit without setting.

t Option code will not be applied if you don't press

button.

t Setting Installation option code is available only with a master wired remote controller.
t Setting Installation option code is available when there is one on one connection between a wired

remote controller and an indoor unit.

NOTE

Troubleshooting

Samsung Electronics 4-15

Selecting motor speed

Selecting the Constant Torque Blower Speed

This air handler uses a Constant Torque high eciency motor. This motor operates on 240 VAC. The motor speed
taps are 24 VAC, 0.03 amps, 60 Hz, 1 PH. The speed taps can be adjusted according to installation needs. Table 4
shows the motor lead connection labeling and the connection denitions. See blower tables in later section for
airow data.

Total 24 VAC circuit amps are 0.14 amps.

Change Motor Speeds

1. Turn o all electrical supply circuits to the air handler at the main service (House Circuit Breaker) panel.

2. Remove the blower door and switch air handler circuit breaker(s) to “OFF”.

3. Disconnect the wire from the isolation relay terminal and reconnect the desired wire to the terminal. The RED
wire is high speed. The VIOLET wire is mid speed. The GREEN wire is low speed. The ORANGE wire is electric
heat high fan speed. The ORANGE wire must be connected to a speed tap that will provide sucient airow for
the size of the electric heat kit. Refer to the heat kit installation manuals for minimum CFM for electric heat kit
activation (usually speed tap 5).

4. Turn the circuit breakers on and reinstall air handler blower door.

5. Turn on all electrical supply circuits to the air handler at the main service (House Circuit Breaker) panel.

6. When black wire(Standard) is required to be connected to tap 5, the orange wire which originally is connected

to tap 5 can be connected to any tap except tap 5.

Terminal Connection

Default speed tap settings

AC018KNZDCH/AAAC024KNZDCH/AAAC030KNZDCH/AAAC036/042KNZDCH/AAAC048KNZDCH/AAAC054KNZDCH/

AA

C

Speed tap common -

24 VAC common

L

Supply voltage -

240 VAC Line 1

G Ground connection

N/L2

Supply voltage -

240 VAC Line 2

T1

Low speed tap -

24 VAC input

"Low" speed "Low" speed "Low" speed "Low" speed "Low" speed

T2

Medium-low speed tap -

24 VAC input

"Low" speed "Mid" speed "Mid" speed "Mid" speed "Mid" speed

T3

Medium speed tap -

24 VAC input

"Mid" speed "High" speed

T4

Medium-high speed tap -

24 VAC input

"High" speed " "High" speed

High speed for

electric heat

"High" speed

High speed for

electric heat

T5

High speed tap -

24 VAC input

High speed for

electric heat

High speed for

electric heat

High speed for

electric heat

"High" speed

High speed for

electric heat

"High" speed

Motor control/voltage taps

Troubleshooting

4-16 Samsung Electronics

Blower CFM tables

AC018KNZDCH/AA,AC024KNZDCH/AA,AC030KNZDCH/AA,AC036KNZDCH/AA,
AC042KNZDCH/AA,AC048KNZDCH/AA,AC054KNZDCH/AA

AC018KNZDCH/AA

HP : 1/3
Default motor taps:
High / Mid /Low = 4/3/2

Motor TapP (inwg) CFMM otor Tap P(inwg)C FM

1

0.1 489

4

0.1 628

0.2 452 0.2 599

0.3 410 0.3 569

0.4 370 0.4 536

0.5 325 0.5 500

0.6 270 0.6 458

0.7 210 0.7 411

0.8 130 0.8 352

2

0.1 525

5

0.1 682

0.2 497 0.2 658

0.3 466 0.3 633

0.4 430 0.4 605

0.5 385 0.5 574

0.6 330 0.6 539

0.7 270 0.7 497

0.8 200

0.8

444444444444

3

0.1 560

= Default Setting

0.2 535

0.3 505

0.4 472

0.5 436

0.6 397

0.7 351

0.8 289

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

100 200 300 400 500 600 700

P (inwg)

Q (CFM)

1

2

3

4

5

Troubleshooting

Samsung Electronics 4-17

AC024KNZDCH/AA

HP : 1/3
Default motor taps:
High / Mid /Low = 4/2/1

Motor TapP (inwg) CFMM otor Tap P(inwg)C FM

1

0.1 561

4

0.1 798

0.2 527 0.2 771

0.3 491 0.3 740

0.4 452 0.4 707

0.5 410 0.5 671

0.6 365 0.6 630

0.7 317 0.7 580

0.8 262 0.8 530

2

0.1 658

5

0.1 888

0.2 625 0.2 859

0.3 589 0.3 831

0.4 550 0.4 799

0.5 508 0.5 764

0.6 462 0.6 723

0.7 410 0.7 675

0.8 349 0.8 620

3

0.1 726

= Default Setting

0.2 695

0.3 661

0.4 625

0.5 586

0.6 543

0.7 493

0.8 435

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

2503 50 4505 50 6507 50 850

)gwni(

P

)MFC( Q

1

2

3

4

5

Troubleshooting

4-18 Samsung Electronics

AC030KNZDCH/AA

HP : 1/2
Default motor taps:
High / Mid /Low = 3/2/1

Motor TapP (inwg) CFMM otor Tap P(inwg)C FM

1

0.1 891

4

0.1 1160

0.2 848 0.2 1126

0.25 826 0.25 1109

0.3 805 0.3 1092

0.4 758 0.4 1055

0.5 710 0.5 1019

0.6 658 0.6 982

0.7 605 0.7 943

0.8 547 0.8 904

0.9 486 0.9 864
1 419 1 823

2

0.1 987

5

0.1 1314

0.2 951 0.2 1282

0.25 932 0.25 1266

0.3 914 0.3 1251

0.4 875 0.4 1217

0.5 834 0.5 1183

0.6 790 0.6 1149

0.7 742 0.7 1113

0.8 690 0.8 1076

0.9 633 0.9 1039
1 567 1 1000

3

0.1 1060

= Default Setting

0.2 1025

0.25 1009

0.3 990

0.4 954

0.5 915

0.6 875

0.7 832

0.8 787

0.9 737
1 684

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

4005 00 6007 00 8009 00 1000 1100 1200 1300 1400

)gwni(

P

)MFC(Q

1

2

3

4

5

Troubleshooting

Samsung Electronics 4-19

AC036KNZDCH/AA

HP : 1/2
Default motor taps:
High / Mid /Low = 5/3/1

Motor TapP (inwg) CFMM otor Tap P(inwg)C FM

1

0.1 891

4

0.1 1160

0.2 848 0.2 1126

0.25 826 0.25 1109

0.3 805 0.3 1092

0.4 758 0.4 1055

0.5 710 0.5 1019

0.6 658 0.6 982

0.7 605 0.7 943

0.8 547 0.8 904

0.9 486 0.9 864
1 419 1 823

2

0.1 987

5

0.1 1314

0.2 951 0.2 1282

0.25 932 0.25 1266

0.3 914 0.3 1251

0.4 875 0.4 1217

0.5 834 0.5 1183

0.6 790 0.6 1149

0.7 742 0.7 1113

0.8 690 0.8 1076

0.9 633 0.9 1039
1 567 1 1000

3

0.1 1060

= Default Setting

0.2 1025

0.25 1009

0.3 990

0.4 954

0.5 915

0.6 875

0.7 832

0.8 787

0.9 737
1 684

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

4005 00 6007 00 8009 00 1000 1100 1200 1300 1400

)gwni( P

)MFC( Q

1

2

3

4

5

Troubleshooting

4-20 Samsung Electronics

AC042KNZDCH/AA

HP : 1/2
Default motor taps:
High / Mid /Low = 5/3/1

Motor TapP (inwg) CFMM otor Tap P(inwg)C FM

1

0.1 1090

4

0.1 1261

0.2 1048 0.2 1226

0.25 1026 0.25 1209

0.3 1005 0.3 1191

0.4 959 0.4 1155

0.5 909 0.5 1120

0.6 858 0.6 1082

0.7 805 0.7 1043

0.8 747 0.8 1005

0.9 685 0.9 964

1 620 1 922

2

0.1 1137

5

0.1 1315

0.2 1101 0.2 1282

0.25 1083 0.25 1266

0.3 1064 0.3 1251

0.4 1025 0.4 1217

0.5 984 0.5 1184

0.6 940 0.6 1149

0.7 892 0.7 1113

0.8 841 0.8 1076

0.9 783 0.9 1039

1 718 1 1000

3

0.1 1180

= Default Setting

0.2 1147

0.25 1128

0.3 1110

0.4 1074

0.5 1035

0.6 995

0.7 952

0.8 907

0.9 857

1 804

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

6007 00 8009 00 1000 1100 1200 1300 1400

)gwni( P

)MFC( Q

1

2

3

4

5

Troubleshooting

Samsung Electronics 4-21

AC048KNZDCH/AA

HP : 3/4
Default motor taps:
High / Mid /Low = 4/2/1

Motor TapP (inwg) CFMM otor Tap P(inwg)C FM

1

0.1 1260

4

0.1 1538

0.2 1167 0.2 1500

0.3 1075 0.3 1462

0.4 981 0.4 1422

0.5 887 0.5 1379

0.6 793 0.6 1331

0.7 699 0.7 1280

0.8 606 0.8 1224

0.9 510 0.9 1158
1 415 1 1078

2

0.1 1379

5

0.1 1739

0.2 1293 0.2 1705

0.3 1210 0.3 1670

0.4 1130 0.4 1633

0.5 1045 0.5 1597

0.6 963 0.6 1559

0.7 878 0.7 1522

0.8 795 0.8 1485

0.9 711 0.9 1446
1 627 1 1406

3

0.1 1475

= Default Setting

0.2 1410

0.3 1348

0.4 1282

0.5 1216

0.6 1148

0.7 1076

0.8 1003

0.9 929
1 850

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

3005 00 7009 00 1100 1300 1500 1700

)gwni( P

)MFC( Q

1

2

3

4

5

Troubleshooting

4-22 Samsung Electronics

Motor TapP (inwg) CFMM otor Tap P(inwg)C FM

1

0.1 1450

4

0.1 1767

0.2 1328 0.2 1727

0.25 1270 0.25 1705

0.3 1213 0.3 1682

0.4 1093 0.4 1638

0.5 975 0.5 1590

0.6 854 0.6 1541

0.7 732 0.7 1490

0.8 613 0.8 1437

0.9 490 0.9 1381
1 370 1 1325

2

0.1 1570

5

0.1 2000

0.2 1490 0.2 1960

0.25 1446 0.25 1940

0.3 1407 0.3 1923

0.4 1325 0.4 1887

0.5 1240 0.5 1847

0.6 1159 0.6 1807

0.7 1077 0.7 1762

0.8 993 0.8 1714

0.9 910 0.9 1664
1 826 1 1608

3

0.1 1642

= Default Setting

0.2 1587

0.25 1557

0.3 1528

0.4 1472

0.5 1412

0.6 1355

0.7 1294

0.8 1233

0.9 1172
1 1109

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

3005 00 7009 00 1100 1300 1500 1700 1900

)gwni( P

)MFC( Q

1

2

3

4

5

AC054KNZDCH/AA

HP : 3/4
Default motor taps:
High / Mid /Low = 5/2/1

Troubleshooting

Samsung Electronics 4-23

4-4 Items to be checked first

1. The input voltage should be rating voltage ±10% range.

The air conditioner may not operate properly if the voltage is out of this range.

2. Is the link cable linking the indoor unit and the outdoor unit linked properly?

The indoor unit and the outdoor unit shall be linked by 4 cables.

Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables.

Otherwise the air conditioner may not operate properly.

3. When a problem occurs due to the contents illustrated in the table below it is a symptom not related to the malfunction of the

air conditioner.

No Operation of air conditioner Explanation

1 In a COOL operation mode, the compressor does not

operate at a room temperature higher than the setting
temperature that the INDOOR FAN should operate.

[In case of heat pump model]

In a HEAT operation mode, the compressor does not
operate at a room temperature lower than the setting
temperature that indoor fan should operate.

In happens after a delay of 3 minutes when the compressor is
reoperated. The same phenomenon occurs when a power is on.
As a phenomenon that the compressor is reoperated after a
delay of 3 minutes, the indoor fan is adjusted automatically with
reference to a temperature of the air blew.

2

Compressor stops operation intermittently in DRY(

)

mode.

Compressor operation is controlled automatically in DRY mode
depending on the room temperature and humidity.

3 [In case of heat pump model]

Compressor of the outdoor unit is operating although it is
turned off in a HEAT mode.

When the unit is turned off while de-ice is activated, the
compressor continues operation for up to 12 minutes(maximum)
until the deice is completed.

4 [In case of heat pump model]

The compressor and indoor fan stop intermittently in HEAT
mode.

The compressor and indoor fan stop intermittently if room
temperature exceeds a setting temperature in order to protect
the compressor from overheated air in a HEAT mode.

5 [In case of heat pump model]

Indoor fan and outdoor fan stop operation intermittently
in a HEAT mode.

The compressor operates in a reverse cycle to remove
exterior ice in a HEAT mode, and indoor fan and outdoor
fan do not operate intermittently for within 20% of the total
heater operation

Samsung Electronics 5-1

5-1-1 MAIN PCB Diagram

- AC018KNZDCH, AC024KNZDCH, AC030KNZDCH, AC036KNZDCH, AC042KNZDCH, AC048KNZDCH, AC054KNZDCH

5. PCB Diagram and Part List

5-1 Indoor Unit

10 9 8 4567

3

1

2

5-2 Samsung Electronics

①



#1:L(L1)
#2:NC
#3:N(L2)

②
#1:N(L2)
#2:NC
#3:L(L1)

③
#1:RELAYN(COMMON)
#3:RPMLOW‒LFSRconnect
#5:RPMMID‒MFSRconnect
#7:RPMHIGH‒HFSRconnect
#2,4,6,8,9:NC

④
#1:THERMALFUSESHORT/OPEN

CHECK
#2:SGND

⑤
#1:EVAINTEMP
#3:EVAOUTTEMP
#5:DISCHARGETEMP(NOTUSE)
#2,4,6:SGND

⑥
#1:INDOORROOMTEMP
#2:SGND

⑦

#1:12V
#2:LED1
#3:LED2
#4:LED3
#5:LED4
#6:LED5
#7:BUZZER
#8:SIGNALOUT(NOTUSE)
#9:AUTOSW(NOTUSE)
#10:REMOTECTRLRECEIVE

SIGNAL
#11:SGND
#12:5V
#13:BUZZER

⑧
#1:SGND
#2:NC
#3:5V
#4:EEPROMSELECT
#5:EEPROMSO
#6:EEPROMSI
#7:EEPROMCLK

⑨

#1:12V
#2:COM2PCTRLMICOM
#3:COM2VCHECKA
#4:COM2VCHECKB
#5:COM2MICOMAD
#6:VCCON/OFFCTRL
#7:COM2ENABLE
#8:COM2C
#9:COM2D
#10:COM2TX
#11:COM2RX
#12:SGND

⑩
#1:F1‒INDOOR/OUTDOOR

COMM

#2:F2‒INDOOR/OUTDOOR

COMM
#3:V1‒12V
#4:V2‒SGND
#5:F3‒WIREDCONTROLLER

COMM
#6:F4‒WIREDCONTROLLER

COMM

CN100 – POWER

CONNECTOR

CN702 – HEATER CONTROL

CN703 – FAN RPM CONTROL

CN140 – FUSE CHECK

CN413 – EVA SENSOR

CN311 – 2 WIRE COMM SUB

PBA

CN412 – ROOM SENSOR

CN302 – COMM

CN501 – DISPLAY & IR

RECEIVER KIT

CN201 – EEPROM

Samsung Electronics 5-3

5-2-1 Main PCB

QAC018JXADCH

5 4 3 2 1 76 8 9 10 11 12

5-2 Outdoor Unit

PCB Diagram and Part List

5-4 Samsung Electronics

①



#1-#3:AC220V

②
#1~#28:SIGNALTOSUBPCB

③
#1~#2:OLPTHERMISTOR

④
#1:DC12V
#2:RXD
#3:TXD
#4:GND

⑤
#1~#5:EEVSIGNAL
#6:DC12V

⑥
#1:COM1(F1)
#2:COM2(F2)

⑦
#1~#2:OUTDOORTHERMISTOR
#3~#4:DISCHARGETHERMISTOR
#5~#6:CONDTHERMISTOR

⑧
#1~#10:Download

⑨
#1:DV310V
#3:GND
#4:DC15V
#5:FANPWM
#6:FANFeedback

⑩
#1~#10:Download

⑪
#1:COMPU-Phase
#2:COMPV-Phase
#3:COMPW-Phase

⑫
#1~#2:Reactor

CN030 : 4WAY VALVE

CN951 : SIGNAL TO SUB PCB

CN252 : THERMISTOR

CN851:S-NET Communication

CN701 : EEV

CN901 : BLDC MOTOR

CN302:Communication(COM1)

CN551: Downloader

CN251 : THERMISTOR

CN451 : COMP POWER

CN201 : Downloader

CN051 : Reactor

PCB Diagram and Part List

Samsung Electronics 5-5

5-2-2 SUB PCB

Q

AC018JXADCH

1 2

①


#1:DC12V
#2:GND

②
#1~#28:SIGNALTOMAINPCB

CN12 : DC12V

CN951 : SIGNAL TO MAIN PCB

PCB Diagram and Part List

5-6 Samsung Electronics

20 19 18 17 16 15 1314 12

11

10

9

8

765

1

2

3

4

No Part Code Local Function Description

1 3711-003404 CN703 BASE-HEATER YW396-03AV BLU
2 3711-003406 CN702 4WAY-1 YW396-03AV YEL
3 3711-003407 CN701 HOTGAS YW396-03AV RED
4 3711-000203 CN101 POWER YW396-03AV WHT
5 3711-002001 CN306 DOWNLOAD YDW200-20P BLK
6 3711-007817 CN806 EEPROM B7P-MQ WHT
7 3711-000024 CN501 MODE SELECTOR SMW250-03 WHT
8 DB65-00320A CN304 DRED DAPC-2009-6P BLK

9 3711-000744 CN103 EARTH YDW236-01 WHT
10 3711-000177 CN303 COMM-INDOOR YW396-02V RED
11 3716-001162 CN003 QUIET S/W BR-7623-2P BLK
12 3711-005096 CN302 COMM-OPTION SMW200-05 BLK
13 3711-007069 CN402 HIGH PRESSURE S/W B04B-XARK-1 RED
14 3711-007325 CN401 LOW PRESSURE S/W B04B-XARK-1 BLU
15 3711-001038 CN305 COMM INV SMW250-06 WHT
16 3711-000939 CN801 ERROR/COMP CHECK SMW250-04 RED
17 3711-000176 CN12 DC12V YW396-02V BLU
18 3711-000997 CN803 EEV1 SMW250-05 BLU
19 3711-001036 CN802 EEV4 SMW250-06 BLU
20 3711-001084 CN403 OUT TEMP/COND/DISQ/OLP SMW250-08 WHT

5-2-3 MAIN PCB

QAC024JXADCH, AC030JXADCH, AC036JXADCH, AC042JXADCH, AC048JXADCH,

AC054KXADCH

PCB Diagram and Part List

Samsung Electronics 5-7

①



#Reactor-A2:WHT
#Reactor-B2:WHT

②



#Reactor-A2:BLK
#Reactor-B2:BLK

③



#1:RXD,#2:TXD
#3:GND,#4:DC5V
#5:DC12V,#6:INV.SMPSsignal

④



#1:RXDATARO,#2:TXDATARO
#3,#8:N.C,#4~#7:DATAsignal
#9:GND,#10:DC5V

⑤



ForS/Wengineerdebugging

⑥



#1:DC360V
#2:N.C
#3:GND
#4:DC15V
#5:FANRPM
#6:FANRPMfeedback

⑦



#1:DC360V
#2:N.C
#3:GND
#4:DC15V
#5:FANRPM
#6:FANRPMfeedback

⑧



#1:COMP.U-phase(RED)
#2:COMP.V-phase(BLU)
#3:COMP.U-phase(YEL)

Reactor-A1/B1 Reactor-A2/B2

CN50(2PIN/RED)-Communication

CN22-Downloader

CN21-DAC/ENCODER

CN91-FAN2

CN90-FAN1 CN71-COMP.

2

3 465 8

7

1

QAC024JXADCH, AC030JXADCH, AC036JXADCH, AC042JXADCH, AC048JXADCH

5-2-4 INVERTER PCB

PCB Diagram and Part List

5-8 Samsung Electronics

QAC054KXADCH

①

#Reactor-A1 : WHT
#Reactor-B1 : WHT

②

#Reactor-A2 : BLK
#Reactor-B2 : BLK

③

#1 : RXD
#2 : TXD
#3 : GND
#4 : DV5V
#5 : DV12V
#6 : INV, SMPS SIGNAL

④

#1 : RXD_INV
#2 : TXD_INV
#3 : BOOT_INV
#4 : TDO_INV
#5 : TCK_INV
#6 : TDI_INV
#7 : TMS_INV
#8 : nTRST
#9 : GND
#10~#11: 5V
#14 #18 #19 : ENC
#17 : GND
#20 : SUB

⑤

#1 : DC310V #2 : N.C
#3 : GND

#4 : DV15V
#5 : FAN RPM #6 : FAN RPM
Feedback

⑥

#1 : DC310V #2 : N.C
#3 : GND

#4 : DV15V
#5 : FAN RPM #6 : FAN RPM
Feedback

⑦

#1 : Compressor U-phase(RED)
#2 : Compressor V-phase(BLU)
#3 : Compressor W-phase(YEL)

⑧

#1 : L-Phase/BRN
#2 :N-Phase/SKY

Reactor-A1/B1 Reactor-A2/B2 CN351 - Main COMM CN551 – Downloader

CN901 – FAN1

CN911 – FAN2

CN401 – Compressor L, N- 220V Power

8 2

1 4 3 7 6 5

PCB Diagram and Part List

Samsung Electronics 5-9

QAC024JXADCH, AC030JXADCH, AC036JXADCH, AC042JXADCH, AC048JXADCH, AC054KXADCH

①



L1:BRN

②



N1:SKY-BLU

③



#1-#3:AC220~240V

L1-AC POWER L phase N1-AC POWER N phase CN01-AC POWER

3 1

2

5-2-5 EMI PCB

Samsung Electronics 6-1

6. Wiring Diagram

6-1 Indoor Unit

- AC018KNZDCH / AC024KNZDCH / AC030KNZDCH / AC036KNZDCH / AC042KNZDCH /
AC048KNZDCH / AC054KNZDCH

This Document can not be used without Samsung’s authorization.

24 VAC

CTBM

L1

L2

GND

240 VAC

WHT

WHT

BLK

GRN

G

BLK

LADDER DIAGRAM

SCHEMATIC DIAGRAM

NO HEAT - 61CC0564D

Wire Colors

BLK - BLACK

BLU - BLUE

BRN - BROWN

ORN - ORANGE

YEL - YELLOW

WHT - WHITE

GRN - GREEN

SFSR COIL

240 VAC

24 VAC

TR

1

2

3

4

5

6

BMFP

3 Amp

Fuse

3 Amp

Fuse

BLK

TR

GGS

WHT

GND

GGS

S

AM

S

UNG

HEATING PRODUCTS

230

PRP

1

C

V1

V2

F3

F4

BLK- L1

WHT - L2

BLU - C

EVA IN

LFSR

6

8

RED

6 8

MFSR

ST3 COIL

C

BRN

C

6

5

ST1 COIL

3

L1

L2

GND

G

BLK

GRN

WHT

NO HEAT

BLK

BLK

BLK

BLK

BLK

8

ORN

LEGEND

TR - TRANSFORMER

BMFP - 9 PIN MOLEX BLOWER MOTOR PLUG ASSEMBLY

GND - GROUND CONNECTION

BMMP - 9 PIN MALE MOLEX BLOWER MOTOR PLUG

CTBM - CONSTANT TORQUE BLOWER MOTOR

GGS - GREEN GROUND SCREW

HFSR - HIGH FAN SPEED RELAY

MT - MOTOR TERMINAL

MFSR - MEDIUM FAN SPEED RELAY

LFSR - LOW SPEED TAP RELAY

LEGEND

WHT - L2

BLK - L1

HPF

BRN - R

BLU - C

ORN = PIN 1

BLK = PIN 2

HPF - 6 PIN HEATER FEMALE PLUG

FAN OUT

BLK

CNTRO BD

WHT

PNK

YEL - L2 - 230 VAC TO HC

RED - L1 - 230VAC TO HC

WHT = PIN 3

BLU = PIN 4

0

1

2

4

6

8

EVA OUT

Room IN

Sensor

Plate

"A" Coil

RED = PIN 5

ORN - DEFROST INDOOR BLOWER MOTOR HI SPEED TAP

ORN

ORN

ORN - ST5

ERROR

EXPLANATION

E101

E121

E122

E123

E162

E163

NO COMMUNICATION FOR 2 MINUTES

BETWEEN INDOOR AND OUTDOOR UNIT

ERROR ON ROOM TEMPERATURE

SENSOR OF INDOOR UNIT (SHORT OR

OPEN)

ERROR ON EVA IN TEMPERATURE

SENSOR OF INDOOR UNIT (SHORT OR

OPEN)

ERROR ON EVA OUT TEMPERATURE

SENSOR OF INDOOR UNIT (SHORT OR

OPEN)

EEPROM ERROR OF MICOM (PHYSICAL

PROBLEM OF PARTS/CIRCUIT)

INDOOR UNITS REMOTE CONTROLLER

OPTION INPUT IS INCORRECT OR

MISSING

F1

F2

1(L)

2(N)

RED

BLU

WHT

BLK

YEL

GRN

BRN

BLU

BRN

BLU

BLK

BLK

BLK

BLK

BLK

GRN

GRN

GRN

PRP

PRP

PRP

PRP

PRP

230

230

PNK

7

8

9

PNK

PNK

PNK

PNK

PNKGRN

GRN

GRN

PRP

PRP

PRP

BLU - C

BLU - C

BLU - C

BLU - C

BRN - R

BRN - R

BRN - R

BRN - R

BRN - R

BRN

BRN

BRN

BRN

RED JACKET

BLK

BLK

BLK

BLK

BLK

BLK

SFSR COIL

FAN OUT

BLK

CNTRO BD

WHT

PRP

SFSR COIL

FAN OUT

BLK

CNTRO BD

WHT

GRN

HFSR

MFSR

LFSR

ST5 COIL

HFSR

BRN

BRN

BRN

BRN

BRN

BRN

GRN

GND

GGS

GRN

BLK

BLK - L1

BLK - L1

BLK - L1

WHT

WHT - L2

WHT - L2

ST - BLOWER MOTOR SPEED TAP

1

2

3

4

5

C

L

G

N

BLOWER

MP

PIN NUMBER S

3

2 1

6

5 4

9

8 7

CT

MOTOR

ORN

PRP

PNK

GRN

GRN

WHT

BLK

BLU

MT

BMMP

Sensor

Sensor

PRP - PURPLE

PNK - PINK

EEV1

DISPLAY

IN/OUT/DIS/EVA

COM2

COM1

HOTCOIL

LOW

FAN OUT

POWER

DOWNLOAD

EXT-T

MED

HIGH

COMP/

ERROR

FUSE-CHK

DRAIN

DVM

SPI

TURBO

CN412

GND

GGS

BLK

BRN

BRN

BLK

BRN

VAC

VAC

VAC

PNK

GRN

PNK

GRN

6-2 Samsung Electronics

6-2 Outdoor Unit

- AC018JXADCH

This Document can not be used without Samsung’s authorization.

Samsung Electronics 6-3

- AC024JXADCH, AC030JXADCH, AC036JXADCH, AC042JXADCH, AC048JXADCH

This Document can not be used without Samsung’s authorization.

6-4 Samsung Electronics

- AC054KXADCH

This Document can not be used without Samsung’s authorization.

Samsung Electronics 7-1

7. Reference Sheet

7-1 Refrigerating Cycle Diagram

Indoor Unit Outdoor Unit

Heat

Exchanger

(Evaporator)

Heat

Exchanger

(Condenser)

Cooling

Gas leak check point

Liquid pipe

Gas pipe

Compressor

Accumulator

3-Way valve

Capillary

3-Way valve

Q CONDENSER

High temperature and high pressure gas state coolant discharged from the compressor is converted to a liquid state as it
is cooled down by the heat emission in the outdoor condenser unit, and sent to the evaporator.

Q COMPRESSOR

Low temperature and low pressure coolant is compressed and sent to the cycling system.

QEVAPORATOR

Liquid coolant sucked in through the capillary tubes cools down the room by absorbing the surrounding
heat as it evaporates (converting from liquid to gas). (Absorbing heat required for evaporation)

QSERVICE VALVE

You can open the valve by turning the need valve counterclockwise using hex wrench, and it is used for vacuum, gas
purging, coolant injection, coolant purging, and indoor-outdoor unit connection.

QACCUMULATOR

Accumulator prevents the flow of liquid-state coolant into the compressor. (Liquid-state coolant flowing into the compres­sor will overload the compressor.)

7-2 Samsung Electronics

Model Code

Product Type

AM DVM

AJ PMA
AC CAC (USD) / ASD
AE EHS
AN VTL

AK

PAK
(Packaged System)

AG CHR

Separator

S General Set (NASA)
N Indoor unit (NASA)
X Outdoor unit (NASA)
A General Set (Non-NASA)
B

Indoor unit (

Non-

NASA)

C

Outdoor unit (

Non-

NASA)

Feature

F FLAGSHIP
P PREMIUM

D DELUXE <- Basic

S STANDARD
L FLAGSHIP + TROPICAL
R PREMIUM + TROPICAL
T DELUXE + TROPICA <- Basic Model

N STANDARD + TROPICAL

Feature

Code Type Remark

1 1 WAY CST

CST

2 2 WAY CST
N MINI 4 WAY CST
4 4 WAY CST
H HSP DUCT

Duct

M MSP DUCT

L LSP DUCT

E FRESH AIR INTAKE DUCT
C CEILING

ETC

J CONSOLE
F Concealed Floor Mounting
G FLOOR MOUNTING
P FAC FAC/PAC
V RAC-A3050(EEV)

RAC

Q RAC-NEO FORTE(EEV)
T RAC-NEO FORTE
D RAC-Domestic
R RAC-MALDIVE
A RAC-A3050
7 RAC-Crystal
U AIR HANDIING UNIT

ASD

Z

AIR HANDLING UNIT WITH

FRESH

Y HYDRO UNIT (Wall mount)

EHS

B HYDRO UNIT (Standing)
X HYDRO UNIT (TANK Integrated)

W WATER TANK

K FLAT(CEILING TYPE)_VTL

VTL

S STAND(EXPOSURE TYPE)_VTL

Power

A A(115V, 60hz, 1Ф)

B B(220V, 60Hz, 1Ф)

C C(208~230V, 60Hz)

D D(200~220V, 50Hz)

E E(220~240V, 50Hz)

F F(208~230V, 60Hz, 3Ф)

G G(380~415V, 50Hz, 3Ф)

H H(380V, 60Hz, 3Ф)

J J(460V, 60Hz, 3Ф)

K K(220~240V, 50/60Hz, 1Ф)

M M(127V, 50Hz)

N N (380~415V, 50/60Hz, 3Ф)

Year

E 2012
F 2013

H 2014

J 2015

K 2016

L

2017

Buyer NameCapacity

Series

C

COOLING ONLY

R410a

H

HEAT PUMP

R

HEAT RECOVERY

D

COOLING ONLY

R22

E

HEAT PUMP

A

Cooling only

R134A

B

Heat Pump

N

N/A

HCH

0

H4H8H

K

H

N

H

Z

H

D

H

C

H

H

H

/

H

A

H

A

H

A

Capacity

1 BTU/H(*100)
2 CMH(*10)
3 HP(/10)
4 WATT(*100)

7-2 Index of Model Name

7-2-1 Indoor Unit

※

"/" can be removed from the buyer card if there are not enough digits.

Samsung Electronics 7-3

Model Code

7-2-2 Outdoor Unit

※

★

MCD: Dummy mock-up model

※

“/” can be removed from the buyer card if there are not enough digits.

Product Type

AM DVM

AJ PMA

AC CAC (USD) / ASD

AE EHS

AN VTL

AK

PAK
(Packaged System)

AG CHR

Separator

S General Set (NASA)
N Indoor unit (NASA)
X Outdoor unit (NASA)
A General Set (Non-NASA)
B

Indoor unit (

Non-

NASA)

C

Outdoor unit (

Non-

NASA)

Feature

F FLAGSHIP
P PREMIUM
D DELUXE <- Basic
S STANDARD
L FLAGSHIP + TROPICAL
R PREMIUM + TROPICAL
T DELUXE + TROPICA <- Basic Model
N STANDARD + TROPICAL

FEATURE

Code Type Remark

A Inv+Side+General Temp

CAC

S Inv+Side+Low Temp

Q Inv+Side+Tropical Temp

F Inv+Top+Tropical Temp

B Non Inv+Side+General Temp

N Non Inv+Side+Low Temp

R Non Inv+Side+Tropical Temp

ࣜ

Non Inv+Top+Tropical Temp

4Way : 4, MSP Duct : M, Ceiling : C

Power

A A(115V, 60hz, 1Ф)

B B(220V, 60Hz, 1Ф)

C C(208~230V, 60Hz)

D D(200~220V, 50Hz)

E E(220~240V, 50Hz)

F F(208~230V, 60Hz, 3Ф)

G G(380~415V, 50Hz, 3Ф)

H H(380V, 60Hz, 3Ф)

J J(460V, 60Hz, 3Ф)

K K(220~240V, 50/60Hz, 1Ф)

M M(127V, 50Hz)

N N (380~415V, 50/60Hz, 3Ф)

Year

E 2012
F 2013

H 2014

J 2015
K 2016

L

2017

Buyer NameCapacity

Series

C

COOLING ONLY

R410a

H

HEAT PUMP

R

HEAT RECOVERY

D

COOLING ONLY

R22

E

HEAT PUMP

A

Cooling only

R134A

B

Heat Pump

N

N/A

HCH

0

H5H4H

K

H

X

H

A

H

D

H

C

H

H

H

/

H

A

H

A

H

A

Capacity

1 BTU/H(*100)
2 CMH(*10)
3 HP(/10)
4 WATT(*100)

This Service Manual is a property of Samsung Electronics Co., Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.

© Samsung Electronics Co., Ltd. March. 2016.
Printed in Korea.
Code No. AC-00154E_1

GSPN (GLOBAL SERVICE PARTNER NETWORK)

Area Web Site

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