Samsung AVXCSH023/032/040CE User manual

Refer to the service manual in the GSPN(see the rear cover) for the more information.
AIR CONDITIONER CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Exploded Views and Parts List
6. PCB Diagram and Parts List
7. Wiring Diagram
8. Schematic Diagram
9. Reference Sheet
SYSTEM AIR CONDITIONER
INDOOR UNIT
AVXCSH023/032/040CE
AVXC4H052/072/100/110/145CE
AVXCMH032/040/052/060CE
AVXDSH020/032/040/052/072/100/110/145CE
AVXDUH100/110/145CE
AVXWVH020/032/040/052/060CE
AVXWNH020/032/040/052/060CE
ND023/032/0401HXCA
ND052/072/100/1454HXCA
ND032/040/052/060MHXCA
ND020/032/040/052/072/100/110/145LHXCA
ND100/110/145SHXCA
ND220/280HHXCE(CA)
ND020/032/040/052/060VHXCA
ND020/032/040/052/060NHXCA
ND052/072CHXCA
ND020/032/040/052/060QHXCA
ND052/072/100/110/1454HXCB
OUTDOOR UNIT
RVXVHT075/100/125FE
RD040/050MHXCA
RD075/100/125VHXFA
RD075/100/125VRXFA

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 ··························································································································· 1-2
1-4 Others ·································································································································································· 1-2
2. Product Specifications ······························································································································ 2-1
2-1 The Feature of Product ································································································································· 2-1
2-1-1 Feature ··················································································································································· 2-1
2-1-2 Changes in comparison to basic model ··················································································· 2-22
2-2 Product Specifications ·································································································································· 2-24
2-2-1 Indoor Unit ··········································································································································· 2-24
2-2-2 Outdoor Unit ······································································································································· 2-47
2-3 Accessory and Option Specifications ····································································································· 2-50
2-3-1 Accessories ··········································································································································· 2-50
3. Disassembly and Reassembly ············································································································ 3-1
3-1 Indoor Unit ························································································································································ 3-2
3-2 Outdoor Unit ···················································································································································· 3-11
4. Troubleshooting ·············································································································································· 4-1
4-1 Setting Option Setup Method ·················································································································· 4-1
4-1-1 PCB option code input method ·································································································· 4-1
4-1-2 Setting an indoor unit address and installation option ···················································· 4-11
4-1-3 Option Items ········································································································································ 4-17
4-2 What to check before diagnosis ··············································································································· 4-19
4-2-1 Lamp combination expression method display (cassette type indoor unit) ··········· 4-19
4-2-2
Numeric type display(outdoor unit, Wired remote controller, wall-mount type etc.) ··· 4-29
4-3 How to take measures for each symptom
(Model : RVXVHT075/100/125FE, RD075/100/125VHXFA) ···························································· 4-31
4-3-1 Outdoor unit operation flow ········································································································ 4-36
4-3-2 Indoor Unit ROOM sensor Error (Open/Short) ······································································ 4-40
4-3-3 Indoor unit EVAP IN sensor Error (Open/Short) ···································································· 4-41
4-3-4 Indoor EVAP OUT sensor Error (Open/Short) ········································································· 4-42
4-3-5 Indoor heat exchanger’s EVAP IN sensor dislocation error ·············································· 4-43
4-3-6 Indoor Heat Exchanger’s EVA OUT sensor dislocation error (Open/Short) ··············· 4-44
4-3-7
Simultaneous Indoor heat exchanger’s EVA IN, OUT sensor dislocation error (Open/Short) ··· 4-45
4-3-8 Operational error of indoor Unit’s Clean Fan (Open/Short) ············································· 4-46

Contents
4-3-9 Breakdown of EEV (2nd) ··················································································································· 4-47
4-3-10 Problem with EEV closure (2nd) ·································································································· 4-48
4-3-11 : Detection of Floating Switch of Indoor Unit’s Drain Pump ·························· 4-49
4-3-12 The operational error of Indoor Unit’s Fan Motor ······························································ 4-50
4-3-13 EEPROM error ···································································································································· 4-51
4-3-14 Option error of the Remote Controller for an Indoor Unit ············································ 4-52
4-3-15 Error due to confused use of Fahrenheit and Celsius ······················································ 4-53
4-3-16 Error due to incorrect Indoor Unit Power/Communication Cable Connection ···· 4-54
4-3-17 SPi Feedback Error ·························································································································· 4-55
4-3-18 Communication error between Indoor and Outdoor units during Tracking ········· 4-56
4-3-19
Communication error between Indoor & Outdoor units after Completing Tracking ··· 4-58
4-3-20 Communication error between Main and Sub Micoms of an Outdoor unit or
among Outdoor Units ··················································································································· 4-59
4-3-21 Outdoor Temperature Sensor error ························································································· 4-60
4-3-22 Outdoor Temperature dislocation error ················································································ 4-61
4-3-23 COND OUT Temperature Sensor error (Open/Short) ······················································· 4-62
4-3-24 Outdoor COND OUT Sensor dislocation error ···································································· 4-63
4-3-25 Discharge Temperature Sensor error for a digital Compressor (Open/Short) ······· 4-64
4-3-26
Discharge Temperature Sensor error for a fixed scroll Compressor (Open/Short) ··· 4-65
4-3-27 Compressor’s Discharge Temperature Sensor dislocation error ································· 4-66
4-3-28 :
Dislocation error of Compressor SUMP Temperature (oil temperature) Sensor ··· 4-67
4-3-29 : Dislocation error of Suction Temperature Sensor ············································· 4-68
4-3-30 SUMP Temperature Sensor error (Open/Short) ·································································· 4-69
4-3-31 High Pressure Temperature Sensor error (Open/Short) ·················································· 4-70
4-3-32 Low Ppressure Temperature Sensor error (Open/Short) ················································ 4-70
4-3-33 Oil Balance Valve Temp. Sensor error (Open/Short) ························································ 4-71
4-3-34 SUCTION Temperature Sensor error (Open/Short) ··························································· 4-72
4-3-35 Double pipe temperature sensor error ·················································································· 4-73
4-3-36 Main Cooling Sol Valve Open Error ·························································································· 4-74
4-3-37 EVI IN Temperature Sensor error (Open/Short) ·································································· 4-75
4-3-38 EVI OUT Temperature Sensor error (Open/Short) ······························································ 4-76
4-3-39 : Comp. Down due to a Protective Control of High pressure ························· 4-77
4-3-40 : Comp. Down due to a Protective Control of Low Pressure ·························· 4-77
4-3-41 Protection Control by Sump Sensor Error ············································································· 4-79
4-3-42 : Comp. Down due to Discharge Temperature Sensor of a Compressor ··· 4-80
4-3-43 3 Detection of phase negative voltage sequence, Phase fail ······································· 4-81
4-3-44 : Comp. Down due to compression rate control ················································· 4-82
4-3-45 :
Self-diagnosis of Oil valve(balance keeping valve) 1(open or closure
breakdown, sensor dislocation or defect)
···························································· 4-83
4-3-46 EVI EEV Open Error ························································································································· 4-84

Contents
4-3-47 , : Prohibition of the operation of Compressor due to
OoutdoorTemperature ·················································································· 4-85
4-3-48 High Pressure below the Average before Cooling (Unable to Restart) ···················· 4-86
4-3-49 Instantaneous Blackout ················································································································ 4-87
4-3-50 Error by High Temperature in an Outdoor Fan Motor ····················································· 4-87
4-3-51 RPM Error of an Outdoor Fan Motor ······················································································· 4-87
4-3-52 Over-Voltage Error of an Outdoor Fan Motor ····································································· 4-88
4-3-53 Counter-Rotation Error of an Outdoor Fan motor ···························································· 4-88
4-3-54 : Over-voltage error of Compressor ·········································································· 4-89
4-3-55 : Low-amperage error of Compressor ······································································ 4-90
4-3-56 Liquid Compressor Protection Control ·················································································· 4-91
4-3-57 Breakdown of an EEV(1st) ············································································································· 4-92
4-3-58 Breakdown of an EEV closure(1st) ····························································································· 4-93
4-4 How to take measures for each symptom(Model : RD040/050MHXCA)
································ 4-94
4-4-1 Indoor Unit ROOM sensor Error (Open/Short)
····································································· 4-97
4-4-2 Indoor unit EVAP IN sensor Error (Open/Short)
··································································· 4-98
4-4-3 Indoor EVAP OUT sensor Error (Open/Short)
········································································ 4-99
4-4-4 Indoor Heat Exchanger’s EVAP IN sensor dislocation error
············································· 4-100
4-4-5 Indoor Heat Exchanger’s EVA OUT sensor dislocation error (Open/Short)
··············· 4-101
4-4-6 :
Simultaneous Indoor Heat Exchanger’s EVA IN, OUT sensor dislocation error (Open/Short) ···· 4-102
4-4-7 : Breakdown of EEV (2
nd
) ································································································ 4-103
4-4-8 : Problem with EEV closure (2
nd
) ·················································································· 4-104
4-4-9 : Detection of Floating Switch of Indoor Unit’s Drain Pump
···························· 4-105
4-4-10 : The operational error of Indoor Unit’s Fan Motor
············································ 4-106
4-4-11 : Mixed operation Error
································································································· 4-107
4-4-12 EEPROM error
·································································································································· 4-108
4-4-13 Option error of the Remote Controller for an Indoor Unit
············································ 4-109
4-4-14 Error due to confused use of Fahrenheit and Celsius
····················································· 4-109
4-4-15 Error due to incorrect Indoor Unit Power/Communication Cable Connection
···· 4-109
4-4-16 Communication error between Indoor and Outdoor units during Tracking
········ 4-110
4-4-17
Communication error between Indoor & Outdoor units after Completing Tracking ··· 4-111
4-4-18 Communication error between main PCB and inverter PCB during Tracking
······ 4-112
4-4-19 Outdoor Temperature Sensor error
························································································ 4-113
4-4-20 COND OUT Temperature Sensor error (Open/Short)
······················································ 4-114
4-4-21 : Outdoor COND OUT Sensor dislocation error
··················································· 4-115
4-4-22 Discharge Temperature Sensor error (Open/Short)
························································· 4-116
4-4-23 : Compressor’s Discharge Temperature Sensor dislocation error
················ 4-117
4-4-24 High Pressure Temperature Sensor error (Open/Short)
················································· 4-118
4-4-25 Double pipe temperature sensor error(Open/Short)
······················································ 4-119
4-4-26 OLP sensor error (Open/Short)
································································································ 4-120

Contents
4-4-27 : Freezing control causes comp. down ··································································· 4-121
4-4-28 : High voltage protection compressor stopped
·················································· 4-122
4-4-29 : Compressor down by low pressure sensor protection control
·················· 4-123
4-4-30 : Dischase temperature sensor error
······································································· 4-124
4-4-31 , , :
Abnormal outside temperature halts operation of the compressor ··· 4-125
4-4-32 : Current protection control causes comp. down
··············································· 4-125
4-4-33 : OLP protection control caused comp. down
····················································· 4-126
4-4-34 , : Electrical malfunctions of the outdoor machine
······························ 4-127
4-4-35 : EEV Off-malfunctions (1
st
) ························································································· 4-128
4-4-36 : EEV Off inefficiently (1
st
) ····························································································· 4-128
5. Exploded Views and Parts List ·········································································································· 5-1
5-1 Indoor Unit ························································································································································ 5-1
5-1-1 Slim 1 way cassette type ················································································································· 5-1
5-1-2 Mini 4 way cassette type ················································································································ 5-7
5-1-3 4 way cassette type ··························································································································· 5-11
5-1-4 Globel 4 way cassette type ············································································································ 5-17
5-1-5 Duct type(Slim I) ································································································································· 5-23
5-1-6 Duct type(Slim II) ······························································································································· 5-25
5-1-7 Duct type(Slim III) ······························································································································ 5-27
5-1-8 Duct type(MSP) ··································································································································· 5-29
5-1-9 Duct type(BIG) ····································································································································· 5-33
5-1-10 Wall-mounted type(Vivace) ········································································································ 5-35
5-1-11 Wall-mounted type(Neo Forte without EEV) ······································································· 5-39
5-1-12 Wall-mounted type(Neo Forte with EEV) ·············································································· 5-43
5-1-13 Ceiling type ········································································································································· 5-47
5-2 Outdoor Unit ···················································································································································· 5-51
5-2-1 RVXVHT075/100FE, RD075/100VHXFA ····················································································· 5-51
5-2-2 RVXVHT125FE, RD125VHXFA ········································································································ 5-55
5-2-3 RD075/100VRXFA ······························································································································· 5-59
5-2-4 RD125VRXFA ········································································································································ 5-63
5-2-5 RD040/050MHXCA ···························································································································· 5-67
6. PCB Diagram ······················································································································································· 6-1
6-1 Indoor Unit ························································································································································ 6-1
6-1-1 Slim 1 way cassette type ················································································································· 6-1
6-1-2 4 way cassette type ··························································································································· 6-3
6-1-3 Mini 4 way cassette type ················································································································ 6-4
6-1-4 Duct type(Slim) ··································································································································· 6-5

Contents
6-1-5 Duct type(MSP) ··································································································································· 6-9
6-1-6 Duct type(BIG) ····································································································································· 6-11
6-1-7 Wall-mounted type(Neo Forte without EEV) ········································································· 6-15
6-1-8 Wall-mounted type(Neo Forte with EEV) ················································································ 6-19
6-1-9 Wall-mounted type(Vivace) ··········································································································· 6-23
6-1-10 Ceiling type ········································································································································· 6-26
6-2 Outdoor Unit ···················································································································································· 6-27
6-2-1 RVXVHT075/100/125FE, RD075/100/125VHXFA ·································································· 6-27
6-2-2 RD040/050MHXCA ···························································································································· 6-33
7. Wiring Diagram ················································································································································ 7-1
7-1 Indoor unit ························································································································································· 7-1
7-1-1 Slim 1 way cassette type ················································································································· 7-1
7-1-2 4 way cassette type ··························································································································· 7-2
7-1-3 Mini 4way cassette type ·················································································································· 7-3
7-1-4 Duct type(Slim I, II) ···························································································································· 7-4
7-1-5 Duct type(Slim III) ······························································································································ 7-5
7-1-6 Duct type(MSP) ··································································································································· 7-6
7-1-7 Duct type(BIG) ····································································································································· 7-7
7-1-8 Wall Mounted type(Vivace) ··········································································································· 7-8
7-1-9 Wall Mounted type(Neo Forte with EEV) ················································································· 7-9
7-1-10 Wall Mounted type(Neo Forte without EEV) ······································································· 7-10
7-1-11 Distributor kit ···································································································································· 7-11
7-1-12 Ceiling type ········································································································································· 7-12
7-2 Outdoor Unit ···················································································································································· 7-13
8. Schematic Diagram ······································································································································ 8-1
8-1 Indoor Unit ························································································································································ 8-1
8-1-1 Slim 1 way cassette type ················································································································· 8-1
8-1-2 4 way cassette type ··························································································································· 8-2
8-1-3 Mini 4 way cassette type ················································································································ 8-3
8-1-4 Duct type ··············································································································································· 8-4
8-1-5 Duct type(BIG) ····································································································································· 8-5
8-1-6 Wall-mounted type(Neo Forte/Vivace) ····················································································· 8-7
8-1-7 Wall-mounted type(Neo Forte with EEV) ················································································ 8-8
8-1-8 Ceiling type ··········································································································································· 8-9
8-2 Outdoor Unit ···················································································································································· 8-10
8-2-1 RVXVHT075/100/125FE, RD075/100/125VHXFA ·································································· 8-10
8-2-2 RD040/050MHXCA ···························································································································· 8-15

Contents
9. Reference Sheet ··············································································································································· 9-1
9-1 Index for Model Name ·································································································································· 9-1
9-1-1 Indoor Unit ··········································································································································· 9-1
9-1-2 Outdoor Unit ······································································································································· 9-3
9-2 Refrigerant Circuit Diagram ························································································································ 9-5
9-2-1 Cycle Operation Mode ····················································································································· 9-5

Samsung Electronics 1-1
1. Precautions
1-1 Precautions for the Service
OUse the standard parts when replacing the electric parts.
– Confirm the model name, rated voltage, rated current of the electric parts.
O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.
O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.
O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.
OTighten tightly the service valve of outdoor unit and the cap of charging valve with a monkey spanner.
O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
O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.
OCheck the distance between the product and the other electronic appliances such as TV, video, and audio.
It should be over 6.6ft.
– If not, it causes a bad picture quality or a noise.
ORepairing the products by consumer should be strictly prohibited.
– There is a danger of electric shock or fire due to incorrect disassembly.

1-2 Samsung Electronics
1-3 Precautions for the Safety
O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.
OIn case any wire or power plug has been damaged, replace it to eliminate any possible danger.
O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.
ODo not use multi socket.
– There is a danger of electric shock or fire.
OGround the product if necessary.
– Be sure to ground the product if there is any danger of electric leakage due to water or moisture.
O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.
O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.
O
The installation must be done by the manufacturer or its service agent or a similar qualified person in order to avoid a hazard.
– Installation by an unqualified person may cause a water leakage, electric shock or fire and so on.
O The electric work must be done by service agent or similarly qualified persons according to national wiring regulations and use
only rated cable.
– If the capacity of the power cable is insufficient or electric work is not properly completed, electric shock or fire may occur.
O Use only rated parts and tools.
– If you don’t use the rated parts and tools, it can cause trouble with the air conditioner and bring about injury.
O If any gas or impurities except R410A refrigerant come into the refrigerant pipe, serious problem may occur and it may cause
injury.
O Leak test must be done using only Nitrogen(NO 2 )gas.
O R410A refrigerant is used for DVM PLUS ,,,, SUPER FJM air conditioner.
– When using R410A, moisture or foreign substances may affect to the capacity and reliability of the product.Safety precautions
must be taken when installing the refrigerant pipe.
– The design pressure of the unit is 4.1MPa. Select appropriate material and thickness according to the regulations.
– R410A is a quasi-azeotrope of two refrigerants.
Make sure to charge liquid one when adding refrigerant.
If you charge gaseous refrigerant, it may affect the capacity and reliability of the product as a result of change formation of the
refrigerant.
O Connect only the indoor units fit on R410A refrigerant. Check whether the indoor units can be connected with the product’s
catalogue. (When incorrect indoor units are connected, they cannot operate normally.)
1-4 Others
O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.

Samsung Electronics 2-1
2. Product Specifications
2-1 The Feature of Product
2-1-1 Feature
2-1-1-1 RVXVHT075/100/125FE, RD075/100/125VHXFA, RD075/100/125VRXFA
1. Introduction
DVM PLUS III is a module multi-system air conditioner that has the world’s largest capacity(7.5~37.5HP) with the application of a
DVI (Digital Vapor Injection) compressor, and can connect up to a maximum of 49 indoor units.
• The highest COP levels in the industry
• The smallest installation space requirement in the world
• The highest heating capacity and COP in low temperature condition (14°F/-10°C)
• Possible to connect up to 49 indoor units
• Digital unit module
2. New technology of DVM PLUS III
QDigital hybrid system
DHS (Digital Hybrid System) is a brand new concept system
composed of DVI (Digital Vapor Injection) compressor, vapor
injection technology and turbo intercooler. These 3 factors
together provide highly efficient performance.
1) DVI compressor
Efficient and reliable DVI (Digital Vapor Injection) compressor
coupled with vapor injection technology has been applied to
improve cooling and heating performance and energy efficiency.
DVI
Compressor
Vapor
Injection Turbo
Intercooler
PWM valve
Discharge port
Suction port
Vapor
injection
port
Oil port
Gas inlet

Product Specifications
2-2 Samsung Electronics
2) Vapor injection technology
Improved cooling and heating performance and COP by a new technology of two stage compression. As injecting optimized
mid-range pressure refrigerant, this technology achieved the high heating performance and COP under the lowest temperature,
which leads the industry.
• Increase refrigerant flow rates with a new vapor injection technology.
• Improved sub-cooling necessary for long piping installation while increasing cooling and heating performance and COP.
3) Turbo intercooler (RVXVH075/100/125FE, RD075/100/125VHXFA Only)
Turbo intercooler (Shell & tube type) improves cooling and heating COP and secures reliable operation of installation with long
piping [200m(656ft)].
Mo + Mi
Mi
Mo
More mass flow passing Indoor unit
increases heating capacity.
1st Expansion
Enthalpy (kJ/kg)
2nd
Expansion
Vapor injection reduces the liquid enthalpy in flash tank,
facilitating heat exchanger to absorb heat more.
Vapor injection
Injection
point
Mo
Mi
Mo + Mi
Evaporator (ID)
Condenser (OD)
DVI compressor
Vapor injection Flash tank
Solenoid Valve
2nd
EEV
1st
EEV
Subcooling liquid refrigerant
Low temperature gas
refrigerant
Low temp. liquid
refrigerant
Saturated liquid
refrigerant
Temperature
High
Low








4) Plate type intercooler (RD075/100/125VRXFA Only)
The plate type intercooler is the new concept intercooler technology which is more advanced than the existing double layered
pipe type and Shell & Tube type heat exchanger. The plate type intercooler increases heat exchange efficiency by 30% and
provides stable performance with long piping and vertical piping.
EER Heat transfer efficiency
Efficiency Rate
Double layered pipe
Shell & Tube
Plate type
Structure Diagram
Plate type
Turbo
Inter-
Cooler
DVI
Compressor

Product Specifications
Samsung Electronics 2-3
QHigh efficiency Ø0.32 heat exchanger
Efficient Ø0.32 grooved tube reduced pressure loss while increasing heat exchange rates to improve COP. Grooved shape is designed
to be high and slim to increase heat transfer performance inside the tube.
Company A
New grooved shape
(High and slim)
Item Improved heat exchanger
Diameter(inch) Ø0.28
o Ø0.32
Heat transfer surface area 19%
n
Pressure loss in heat
exchanger
Evaporation 14.1%
p
Condensation 10.3%
p
Inside heat transfer performance 30.8%
n
Pressure resistance same
QNew G-fin
Highly efficient new G-fin increased heat transfer performance, reinforced corrosion resistance, and increased operating duration in
frost condition.
• Heat transfer performance improved by 13% compared to the conventional fin, even with the equivalent pressure loss.
• Epoxy acrylic coating reinforced corrosion resistance.
• 1.4 times longer heating operation in frost condition thanks to new G-fin.
60
50
40
30
20
10
0
Hydrophilic layer
Acrylic resin + surfactant
Anti corrosive layer
Epoxy acrylic
1.0μm
2.0μm
92μm
Raw aluminum
material
-10
-20
-30 030
Time (min.)
60
Eva. Cond., temperature (°C)
Capacity, Power output (W)
5000
4000
3000
2000
1000
0030
Time (min.)
60 90 120
(New G-fin) Conventional model (Louver fin)

Product Specifications
2-4 Samsung Electronics
QNewly designed fan guard
Fan guard has been optimized to improve air volume and reduce noise and vibration.
• BLDC motor, which is 2.7% more efficient than the competitors has been applied.
• High static pressure propeller fan and the optimum Bell mouth figuration for high external static pressure. (8mmAq)
RPM
Efficiency
100
90
80
70
60
50
40
30
200 300 400 500 600 700 800 900 1000
DVM PLUS III
Company A
Conventional model

Product Specifications
Samsung Electronics 2-5
QUpgraded control solutions
1) Easy management system
A wide range of control system is provided to support various needs and applications such as individual or central control and
automated building management.
Internet
2) Enhanced remote analysis
System managers, installers or service engineers can monitor the whole air-conditioning system through the internet, analyzing
the operation and providing service promptly.

Product Specifications
2-6 Samsung Electronics
3) Simple contact control
Contact interface makes it possible to connect mechanical contacts to indoor units directly, allowing individual and group control
as well as malfunction monitoring of the indoor units.
4) Wrong wiring protection
Non-polarity communication ensures Normal Operation of air-conditioning system even in case of wrong communication wiring.
Furthermore, power protection mechanism protects indoor units from blowing out under a crossed connection between power and
communication wires, resulting in enhancing system safety and robustness.
Normal
Faulty
Window
synchronization
Emergent control
Operation state
Schedule control Key holder
synchronization
Z Direct ON/OFF indoor unit control
Z Automatic recovery for incorrect
communication wiring
F1 F2
Outdoor unit
L N F1 F2
Indoor unit 1
L N F1 F2
Indoor unit 1
Non-Polarility
Wrong wiring
F1 F2
Outdoor unit
L N F1 F2
Indoor unit 1
L N F1 F2
Indoor unit 1
Protection
F1 F2
Outdoor unit
L N F1 F2
Indoor unit 1
L N F1 F2
Indoor unit 1
Protection
Wrong wiring Wrong wiring
Wrong wiring
Wrong wiring
Wrong wiring
Wrong wiring
Z Protection against wrong power line connection
5) Wireless test run tool
Zigbee wireless test run tool provides installers with easy and convenient control and monitoring of the outdoor unit and 49 indoor
units without bothersome wiring.

Product Specifications
Samsung Electronics 2-7
3. Main features of DVM PLUS III, DVM PLUS III HR
T High Performance and Efficiency
QHigh COP
High efficiency DVM PLUS III has improved average cooling and heating COP compared to conventional products and achieved the
world’s top class energy efficiency.
• DHS(Digital Hybrid System) technology increased refrigerant flow rate and evaporation enthalpy difference.
• Wide Ø0.32 Grooved tube and new G-fin increased heat exchange efficiency.
• The best BLDC motor in the industry and optimum fan guard design increased efficiency.
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

QImproved heating performance
Vapor injection technology has improved heating performance
by 20% at a low ambient temperature of (14ºF/-10ºC).
ConventionalConventional
Company ACompany A
21kW
25kW
21kW
10HP

Product Specifications
2-8 Samsung Electronics
T Simple and Easy Installation
QDigital unit module
Digital unit module combination enables the system to alternate
compressor operation to prolong each compressor’s life cycle and
improves COP with part loads.
• Control the compressor capacity precisely.
• Ensure long life cycle by alternating operation of the DVI compressors.
• Improve COP using multiple heat exchangers of outdoor units at part
loads.
DVI
Scroll FVI
Scroll
DVI
Scroll FVI
Scroll
A unit B unit
QFree installation
DVM PLUS III provides the degree of freedom from priority of capacity when installing outdoor units in module.
8HP
>
Any priority is OK.
7.5HP
(Digital unit)
12.5HP
(Digital unit)
10HP
(Digital unit)
Conventional model
A digital outdoor unit with the largest
capacity should come last.
7.5HP
(Fixed unit)
10HP
(Fixed unit)
12.5HP
(Digital unit)
Company A
An outdoor unit with the largest capacity
should come first.
14HP 10HP
>
DVM PLUS III
QSmall size and light weight
To facilitate the convenience and mobility of module installation, DVM PLUS III is the best compact air conditioner in the world
with its small size and weight. It reduces the burden of weight and minimizes the required installation space (it can be installed in
the rooftop), ensuring a more spacious place for relaxation, parking lots, or additional offices, for instance.
Z Rooftop space (Garden)
Item
Design
Weight
Conventional model
250kg(551lbs) (100%) 240kg(529lbs) (96%)

Product Specifications
Samsung Electronics 2-9
QRapid installation
DVM PLUS III supports more convenient and rapid installation work through the improvement of service valve structure and the
provision of branch joints.
• Improved the location of service valve and welding points for aiding piping connection work
• Modified the plate into open structure type for keeping interference out during welding work
• The application of OTS (One Touch Solution) valve that makes it easy to connect pipes and to open or shut valves.
DVM PLUS Ⅱ
ÔY, Header, Outdoor joints allow easy piping expansion and reduction with insulations to facilitate the installation.
Y-joint Outdoor joint Header joint
260mm(10.24inch)
423mm(16.65inch)
120mm(4.72inch) 50mm(1.97inch)
QFree piping & wiring directions
DVM PLUS III is easy to install as its piping can be connected from front, right, left and bottom side.
Wiring hole (Conduits) adds convenience as it allows power and communication lines to be connected in various ways and directions.
Free piping connection Free wiring connection

Product Specifications
2-10 Samsung Electronics
∆P
h
P
Corrected target
pressure according to
pressure drop of piping
(
∆P compensation)
Indoor’s low pressure
(Eva. inlet temperature
of indoor units)
Outdoor unit’s
low pressure
∆P{
QThe world’s longest piping length
DVM PLUS III has an actual piping length of 656ft, with the maximum
piping length of 147.6ft from the first branch joint to the farthest
indoor unit, thereby providing convenience and flexibility for installa-
tion for commercial buildings.
• The longest piping length : 721.8ft (Equivalent)
• Total piping length: 3280.8ft
• From the first branch joint to the farthest indoor unit : 295.3ft
- Upsize all pipes between branch joints. (liquid&gas)
Level difference between
indoor units : 49.2ft
The longest pipe length
: 721.8ft (Equivalent)
The first branch
joint to the farthest
indoor unit : 147.6ft
(1 size up : 295.3ft)
Level differences
between indoor &
outdoor unit : 164ft
QAutomatic piping length recognition
With automatic piping length recognition, installation can be carried out without extra PCB setup.
QHigh external static pressure
To respond to a range of various installation environments, DVM PLUS
III is designed to be used even in external static pressure of 8 mmAq.

Product Specifications
Samsung Electronics 2-11
T Easy Maintenance
QAuto data backup in PCB
In case of problems in product, operation information of last 20 mins is stored before system shut down. Therefore, DVM PLUS III can
be diagnosed rapidly and serviced.
Data
Time
System
stop
High pressure
Fan motor RPM
Current
Data storing
SNET 1+
QRefrigerant pump-down and pump-out
DVM PLUS III provides several functions to facilitate the replacements of product, additional installation and maintenance without
much effort.
Z Refrigerant pump-down function
In case of moving outdoor units, maintenance of pipes between
indoor units, between outdoor units and indoor units, it is possible
that recover refrigerant into outdoor units.
Z Refrigerant pump-out function
In case of maintenance of outdoor units, it is possible that recover
refrigerant into indoor or pipes.
Breakdown
Breakdown