Samsung AC024BXUPCH User manual

AIR CONDITIONER CONTENTS
SYSTEM AIR CONDITIONER
SINGLE for North America(R-410A, Heat Pump)
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram and Parts List
6. Wiring Diagram
7. Reference Sheet
Unitary OutdoorUnit AHU Control Unit
AC024BXUPCH
AC036BXUDCH
AC036BXUPCH
AC048BXUPCH
AC060BXUPCH
MXD-U000XN

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. Precautions for Handling Refrigerant for Air Conditioner........................................................................1-2
1-5. Precautions for Welding the Air Conditioner Pipe......................................................................................1-2
1-6. Precautions for Additional Supplement of Air Conditioner Refrigerant................................................1-2
1-7. Other Precautions..............................................................................................................................................1-2
2. Product Specifications................................................................................................ 2-1
2-1. Outdoor Unit with AHU Control Unit.............................................................................................................2-1
2-2. Product Specifications .................................................................................................................................... 2-3
2-3. Specifications of optional items.................................................................................................................... 2-5
2-3-1. Accessories .............................................................................................................................................. 2-5
3. Disassembly and Reassembly.................................................................................... 3-1
3-1. Outdoor unit...................................................................................................................................................... 3-2
3-1. AHU Control Unit............................................................................................................................................ 3-25
4. Troubleshooting ......................................................................................................... 4-1
4-1. Diagnostic Checkliest...................................................................................................................................... 4-1
4-1-1. Test operation mode and check mode ................................................................................................ 4-1
4-2. Troubleshooting by symptoms..................................................................................................................... 4-7
4-2-1. When the outdoor unit power is not ON - Initial Diagnosis : Single phase products ................ 4-7
4-2-2. Communication error between outdoor unit INV ↔MAIN MICOM (1 min.) - (E203) ................4-9
4-2-3. Outdoor sensor error - (E221, E231, E251, E320) .............................................................................4-10
4-2-4. High Pressure sensor error (Open/Short) - (E291) .........................................................................4-11
4-2-5. Suction Temperature sensor error (Open/Short) - (E308)........................................................... 4-12
4-2-6. Compressor down due to freezing control - (E403)....................................................................... 4-13
4-2-7. System stop due to overload protection control - (E404)............................................................. 4-13
4-2-8. Comp. Down due to High Pressure Protection Control - (E407).................................................. 4-14
4-2-9. Comp. down due to low pressure sensor protection (E410)......................................................... 4-15
4-2-10. Comp. down due to disharge temperature protection control - (E416)................................... 4-16
4-2-11. Heating operation restricted at outdoor temperature over Theat_high value
 (default:86℉(30℃))-(E440)........................................................................................................... 4-17
4-2-12. Cooling operation restricted at outdoor temperature over Tcool_low value
 (default:32℉(0℃))-(E441)............................................................................................................. 4-17
4-2-13. Outdoor unit FAN error - (E458, E475)............................................................................................ 4-18
4-2-14. Compressor error - (E461, 467) ........................................................................................................ 4-19
4-2-15. Current error - (E462, 484)................................................................................................................ 4-21
4-2-16. Over Load Protection Error (E463) ..................................................................................................4-22
4-2-17. IPM (Over Current) error - (E464)....................................................................................................4-23
4-2-18. Compressor over load error- (E465) ...............................................................................................4-26
4-2-19. DC Link voltage under/over error - (E466), Overvoltage of H/W detect DC Link error - (E483)
AC Input voltage sensor error - (E488) .......................................................................................... 4-27
4-2-20. Current sensor error - (E468)...........................................................................................................4-28
4-2-21. DC Link voltage sensor error (Short/Open) - (E469)....................................................................4-28
4-2-22. Outdoor unit EEPROM Read/Write error (Option) - (E470)
Outdoor unit EEPROM Read/Write error (H/W) - (E471).............................................................4-28

Contents
4-2-23. IPM(IGBT Module) heat sink error - (E474), IPM overheat error - (E500) ................................4-29
4-2-24. Input current sensor error (Short/Open) - (E485).......................................................................4-29
4-2-25. Error due to high pressure switch open or compressor down by high pressure - (E507).... 4-30
4-4-26. Gas leakage error - (E554)................................................................................................................ 4-31
4-2-27. Blockage deteced on high pressure pipe duing heating operation - (E534) ...........................4-33
5. PCB Diagram and Parts List........................................................................................ 5-1
5-1. Outdoor Unit Main PBA................................................................................................................................... 5-1
5-2. Outdoor Unit Inverter PBA............................................................................................................................. 5-3
5-3. Outdoor Unit EMI PBA..................................................................................................................................... 5-5
5-4. AHU Control Unit PBA..................................................................................................................................... 5-6
6. Wiring Diagram........................................................................................................... 6-1
6-1. Outdoor Unit...................................................................................................................................................... 6-1
6-2. AHU Control Unit ............................................................................................................................................. 6-2
7. Reference Sheet...........................................................................................................7-1
7-1. Index for Model Name ......................................................................................................................................7-1
7-1-1. Outdoor Unit..............................................................................................................................................7-1
7-1-2. Outdoor Unit ............................................................................................................................................ 7-2
7-2. Refrigerating Cycle Diagram ......................................................................................................................... 7-3

Samsung Electronics 1-1
1. Precautions
1-1. Precautions for the Service
● Use the correct parts when changing the electric parts.
– Please check the labels and notices for the model name, proper voltage, and proper current for the electric parts.
● Fully repair the connection for the types of harness when repairing the product after breakdown.
– A faulty connection can cause irregular noise and problems.
● When disassembling or assembling, make sure that the product is laid down on a work cloth.
– Doing so will prevent scratching to the exterior of the rear side of the product.
● Completely remove dust or foreign substances on the housing, connection, and inspection parts when performing repairs.
– This can prevent fire hazards for tracking, short, etc.
● Please tighten the service valve of the outdoor unit and the valve cap of the charging valve as securely as possible by using
a monkey spanner.
● Check whether the parts are properly and securely assembled after performing repairs.
– These parts should be in the same condition as before the repair.
1-2. Precautions for the Static Electricity and PL
● Please carefully handle the PCB power terminal during repair and measurement when it is turned on since it is vulnerable
to static electricity.
– Please wear insulation gloves before performing PCB repair and measurement.
● Check if the place of installation is at least 2m away from electronic appliances such as TV, video players, and stereos.
– This can cause irregular noise or degrade the picture quality.
● Please make sure the customer does not directly repair the product.
– Arbitrary dismantling may result in electric shock or fire.
1-3. Precautions for the Safety
● Do not pull or touch the power plug or the subsidiary power switch with wet hands.
– This may result in electric shock or fire.
● If the power line or the power plug is damaged, then it must be changed since this is a hazard.
● Do not bend the wire too much or position it so that it can be damaged by a heavy object on top.
– This may result in electric shock or fire.
● The use of multiple electric outlets should be prohibited.
– This may result in electric shock or fire.
● Ground the connection if it is necessary.
– The connection must be grounded if there is any risk of electrical short due to water or moisture.
● Unplug the power or turn off the subsidiary power switch when changing or repairing electrical parts.
– Doing so will prevent electric shock.
● Explain to workers that the battery for the remote control needs to be separated for storage purposes when the product
will not be used for a long time.
– This can cause a problem for the remote control since battery fluid may trickle out.

Precautions
1-2 Samsung Electronics
1-4. Precautions for Handling Refrigerant for Air Conditioner
Environmental Cautions: Air pollution due to gas release
● Safety Cautions
If liquid gas is released, then body parts that come into contact with it may experience frostbite/blister/numbness.
If a large amount of gas is released, then suffocation may occur due to lack of oxygen. If the released gas is heated, then noxious
gas may be produced by combustion.
● Container Handling Cautions
Do not subject container to physical shock or overheating. (Flowage is possible while moving within the regulated pressure.)
1-5. Precautions for Welding the Air Conditioner Pipe
● Dangerous or flammable objects around the pipe must be removed before the welding.
● If the refrigerant is kept inside the product or the pipe, then remove the refrigerant prior to welding.
If the welding is carried out while the refrigerant is kept inside, the welding cannot be properly performed. This will also produce
noxious gas that is a health hazard. This leakage will also explode with the refrigerant and oil due to an increase in the refrigerant
pressure, posing a danger to workers.
● Please remove the oxide produced inside the pipe during the welding with nitrogen gas.
Using another gas may cause harm to the product or others.
1-6. Precautions for Additional Supplement of Air Conditioner Refrigerant
● Precisely calculate the refrigerant by using a scale and S-net, and proceed with the test operation.
Excessive supplement can cause harm to the product since it can cause an inflow of the liquid refrigerant into the compressor.
● Do not heat the refrigerant container for a forced injection.
This may cause harm to the product or others since the refrigerant container may burst.
● Do not operate the product after removing the product safety pressure switch and sensor.
If the product is blocked inside, then this may cause harm to the product or others due to the excess pressure increase of the
refrigerant gas.
1-7. Other Precautions
● There should be no leakage of the pipes after installation. When withdrawing the refrigerant, the compressor should be
stopped before removing the connecting pipe.
If the compressor is operating while the refrigerant pipe is not correctly connected and the service valve is opened, then
air and other substances can enter the pipe. The interior of the refrigerant cycle may then build up excessive high pressure
resulting in explosion and damage.

Samsung Electronics 2-1
2. Product Specifications
2-1. Outdoor Unit with AHU Control Unit
■ Howthesystemworks?
Any types of 3rd party indoor unit via SAMSUNG AHU Control Unit can be connected to SAMSUNG New CAC
Hybrid Inverter Unitary outdoor unit.
AHU Control Unit installed either inside or nearby the indoor unit in the utility room receives the input signal
from Thermostat installed in a living space and transmits the signals to both indoor unit and Hybrid Unitary
outdoor unit respectively.
■ 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 52℃(125.6℉)
and provide warmth in the freezing cold of -25℃(-13℉) to ensure a constant and comfortable home environ-
ment.
■ 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.
DIGITAL INVERTER
Non - inverter
Steady Temperature Fluctuation
High Temperature Fluctuation
Uncomfortable
(Energy Loss)
Comfortable
25℃
(77℉)
24℃
(75.2℉)
23℃
(73.4℉)
Uncomfortable
(Energy Loss)
TECHNOLOGY

2-2 Samsung Electronics
■ 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.

Samsung Electronics 2-3
2-2. Product Specifications
Item
ADP® MPAHU + Unitary OutdoorUnit + AHU Control Unit
ADP® Indoor Unit AVT240BT AV360CT AV360CT
Outdoor Unit
Simple
US code CXH024UPB CXH036UDB CXH036UPB
Model
Code AC024BXUPCH AC036BXUDCH AC036BXUPCH
AHU Control Unit MXD-U000XN
Design
Indoor Unit
Outdoor Unit
AHU Control Unit
Performance Cooling [Btu/h] 24,000 36,000 36,000
Heating [Btu/h] 26,000 34,600 34,600
Power
Consumption
Cooling [kW] 0.91/2.38/3.15 1.05/4.00/4.50 0.98/3.43/4.10
Heating [kW] 0.72/2.44/5.40 0.83/3.19/5.40 0.85/3.36/5.40
Efficinecy SEER2 16.5 1 7.0 18.5
HSPF2 8.1 8.1 8.4
Voltage / Frequency (Φ, V, Hz) 1,208-230,60 1,208-230,60 1,208-230,60
Operating
Current
Cooling [A] 5.7/11.3/16.2 5.8/18.0/20.0 5.4/15.6/18.2
Heating [A] 4.5/11.5/24.0 4.6/14.5/24.0 4.7/15.1/24
Sound
Pressure Outdoor Unit [dBA] (C/H) 50/52 53/55 52/54
External
Dimension
Net Dimension
(WxHxD)
Outdoor Unit
[mm(inch)]
940 x 998 x 330
(37.01 x 39.29 x 12.99)
940 x 998 x 330
(37.01 x 39.29 x 12.99)
940 x 1,210 x 330
(37.01 x 47.64 x 12.99)
Shipping Dimension
(WxHxD)
Outdoor Unit
[mm(inch)]
995 x 1,096 x 426
(39.17 x 43.15 x 16.77)
995 x 1,096 x 426
(39.17 x 43.15 x 16.77)
995 x 1,388 x 426
(39.17 x 54.65 x 16.77)
Net Weight Outdoor Unit
[kg(lbs)] 74.0(163.14) 78.0(178.96) 89.0(196.21)
Gross Weight Outdoor Unit
[kg(lbs)] 79.0(174.17) 83.0(182.98) 99.0(218.26)
Harness
Specifications
Compressor UG8T300FUBJUSG UG5TK1450FJXSG UG5TK1450FJXSG
Outdoor Fan Motor DB31-00579A DB31-00579A DB31-00579A
Piping
Connections
Liquid pipe [mm(inch)] 9.52(3/8") 9.52(3/8") 9.52(3/8")
Gas pipe [mm(inch)] 19.05(3/4") 19.05(3/4") 22.23(7/8")
Allowable Gas pipe [mm(inch)] 15.88(5/8") ~ 22.23(7/8") 15.88(5/8") ~ 22.23(7/8") 19.05(3/4") ~ 22.58(1-1/8")
Refrigerant Type R-410A R-410A R-410A
Factory Charging [kg(lbs)] 3.2(7.06) 3. 6( 7.94 ) 4.2(9.26)
Additional Refrigerant (over 24.6ft(7.5m)) [oz/ft] 0.5 0.5 0.5
Basic Piping Length [ft(m)] 24.6(7.5) 24.6(7.5) 24.6(7.5)
Max. Piping Length [ft(m)] 98(30) 164(50) 164(50)
Max. Level Difference [ft(m)] 49(15) 98(30) 98(30)

2-4 Samsung Electronics
2-2. Product Specifications (cont.)
Item
ADP® MPAHU + Unitary OutdoorUnit + AHU Control Unit
ADP® Indoor Unit AV480CT AV600CT
Outdoor Unit
Simple
US code CXH048UPB CXH060UPB
Model
Code AC048BXUPCH AC060BXUPCH
AHU Control Unit MXD-U000XN
Design
Indoor Unit
Outdoor Unit
AHU Control Unit
Performance Cooling [Btu/h] 48,000 57,000
Heating [Btu/h] 44,000 53,000
Power
Consumption
Cooling [kW] 1.30/5.58/6.10 1.30/6.71/7.00
Heating [kW] 1.12/4.99/7.20 1.13/5.91/7.20
Efficinecy SEER2 17.0 17. 5
HSPF2 8.5 9.0
Voltage / Frequency (Φ, V, Hz) 1,208-230,60 1,208-230,60
Operating
Current
Cooling [A] 7.1 /24 .8/2 7.1 7.1/29.8/31.1
Heating [A] 6.1/22.2/32.0 6.2/26.3/32.0
Sound
Pressure Outdoor Unit [dBA] (C/H) 55/57 56/58
External
Dimension
Net Dimension
(WxHxD)
Outdoor Unit
[mm(inch)]
940 x 1,210 x 330
(37.01 x 47.64 x 12.99)
940 x 1,420 x 330
(37.01 x 55.91 x 12.99)
Shipping Dimension
(WxHxD)
Outdoor Unit
[mm(inch)]
995 x 1,388 x 426
(39.17 x 54.65 x 16.77)
995 x 1,598 x 426
(37.17 x 62.91 x 16.77)
Net Weight Outdoor Unit
[kg(lbs)] 89.0(196.21) 101.0(222.67)
Gross Weight Outdoor Unit
[kg(lbs)] 99.0(218.26) 111.0(244.71)
Harness
Specifications
Compressor UG5TK1450FJXSG ATQ420D1UNT1
(DB95-05859A)
Outdoor Fan Motor DB31-00579A DB31-00579A
Piping
Connections
Liquid pipe [mm(inch)] 9.52(3/8") 9.52(3/8")
Gas pipe [mm(inch)] 22.23(7/8") 22.23(7/8")
Allowable Gas pipe [mm(inch)] 19.05(3/4") ~ 22.58(1-1/8") 19.05(3/4") ~ 22.58(1-1/8")
Refrigerant Type R-410A R-410A
Factory Charging [kg(lbs)] 4.2(9.26) 4.8(10.58)
Additional Refrigerant (over 24.6ft(7.5m)) [oz/ft] 0.5 0.5
Basic Piping Length [ft(m)] 24.6(7.5) 24.6(7.5)
Max. Piping Length [ft(m)] 164(50) 98(30)
Max. Level Difference [ft(m)] 98(30) 49(15)

Samsung Electronics 2-5
2-3. Specifications of optional items
2-3-1. Accessories
Item Description CodeNo. Q’ty Remark
Manual Install DB68-12064A 1
Outdoor Unit
Label Energy DB68-12063ABCDE 1
Rubber-Leg DB73-20134A 4
Item Description CodeNo. Q’ty Remark
Manual Install DB68-12061A 1
AHU Control
Unit
Label Instruction
(Wiring label) DB68-12062A 1
U-ring DB60-00444A 20
Fan speed control wire DB93-17752A 1
Cable tie DB65-10088B 2
M4x16 screws 6002-000215 4
Holder lock DB61-00945A 4
■AC***BXU*CH
■MXD-U000XN

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

Disassembly and Reassembly
3-2 Samsung Electronics
■ AC024BXUPCH, AC036BXUDCH
No. Parts Procedure Remark
1 Cabinet Front RH
Turn off the power before disassembly
necessarily.
1) Remove 3ea of screws from the
Cabinet Front RH and separate it.
(Use + Screw Driver)
2 Cabinet Upper 1) Remove 8ea of screws which are fixed
to each side of Cabinet Upper and
separate it.
(Use + Screw Driver)
3 Cabinet-Installation
Front Part
1) Remove a screw which is fixed to
Cabinet-Installation Front Part and
separate it.
(Use + Screw Driver)
3-1. Outdoor unit

Disassembly and Reassembly
Samsung Electronics 3-3
No. Parts Procedure Remark
4 Outdoor Unit Guard 1) Pull out the sensor from the Outdoor
Unit Guard and separate it.
2) Remove the 4ea of screws which
are fixed to Outdoor Unit Guard and
separate it.
(Use + Screw Driver)

Disassembly and Reassembly
3-4 Samsung Electronics
No. Parts Procedure Remark
5 Cabinet Rear RH 1) Pull out the sensor from the Cabinet
Rear RH and separate it.
2) Remove 9ea of screws which are
fixed to each side of Cabinet Rear RH
and separate it.
(Use + Screw Driver)

Disassembly and Reassembly
Samsung Electronics 3-5
No. Parts Procedure Remark
6 Cabinet-Installation
Rear Part
1) Remove a screw from the Cabinet-
Installation Rear Part and separate it.
(Use +Screw Driver)
7 Cabinet Front LF 1) Remove 9ea of screws from the
Cabinet Front LF and separate it.
(Use +Screw Driver)

Disassembly and Reassembly
3-6 Samsung Electronics
No. Parts Procedure Remark
7 Cabinet Front LF
8Fan 1) Remove the 2 hex nuts like the
picture on the right side.
(Use Hexagon Wrench, Monkey
Spanner, Hexagon Socket)

Disassembly and Reassembly
Samsung Electronics 3-7
No. Parts Procedure Remark
9Motor 1) Separate the Fan Propeller.
2) Remove 8ea of screws which are
fixed to Motor. (Use +Screw Driver)
3) Separate the Motor Wire connector
from the Outdoor Unit Control Part.
10 Bracket Motor 1) Remove 2ea of screws from the
Bracket Motor and separate it.
(Use +Screw Driver)

Disassembly and Reassembly
3-8 Samsung Electronics
No. Parts Procedure Remark
11 Base Heater
(※ AC024BXADCH
Only)
1) Remove 4ea of screws from the Base
heater and separate it.
(Use +Screw Driver)
2) Separate the Base heater Wire
connector from the Outdoor Unit
Control Part.

Disassembly and Reassembly
Samsung Electronics 3-9
No. Parts Procedure Remark
12 Control Part 1) Separate the 7 connectors from the
Outdoor Unit Control part.
2) Remove the 2ea screw which is fixed
to Control Part. (Use +Screw Driver)
3) Separate the Control Part.

Disassembly and Reassembly
3-10 Samsung Electronics
No. Parts Procedure Remark
13 4 Way Valve 1) First, discharge the refrigerant
Remove 2ea of screws which are fixed
to Service Valve. (Use +Screw Driver)
2) Separate the inlet and outlet pipes by
welding torch.
If you separate the Compressor,
Heat Exchanger or Pipe, please
fully discharge refrigerant in the
Compressor and then separate the Pipe
by welding torch.