Samsung AM080FXMDGH Series User manual

AIR CONDITIONER CONTENTS
SYSTEM AIR CONDITIONER
OUTDOOR UNIT
Model Code : AM080/090FXMDGH
666
AM080MXMDGH 666
AM080MXMDGC 666
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram and Parts List
6. Wiring Diagram
7. Cycle Diagram
8. Key Options
9. Reference Sheet

Section 0
2Samsung Electronics
Contents
1. Precautions....................................................................................................4
1-1 Precautions for the Service............................................................................................................................4
1-2 Precautions for the Static Electricity and PL...........................................................................................4
1-3 Precautions for the Safety..............................................................................................................................4
1-4 Precautions for Handling Refrigerant for Air Conditioner................................................................5
1-5 Precautions for Welding the Air Conditioner Pipe...............................................................................5
1-6 Precautions for Additional Supplement of Air Conditioner Refrigerant ....................................5
1-7 Other Precautions..............................................................................................................................................5
2. Product Specifications .................................................................................6
2-1 The Feature of Product....................................................................................................................................6
2-1-1 Feature......................................................................................................................................................6
2-1-2 Changes in comparison to basic mode......................................................................................8
2-1-3 Structure of product (DVM S ECO)................................................................................................9
2-2 Product Specifications................................................................................................................................. 10
2-2-1 Outdoor Unit....................................................................................................................................... 10
2-3 Accessory and Option Specifications..................................................................................................... 12
2-3-1 Accessories........................................................................................................................................... 12
3. Disassembly and Reassembly ...................................................................13
3-1 Necessary Tools ............................................................................................................................................... 13
3-2 Disassembly and Reassembly ................................................................................................................... 14
3-2-1 DVM S ECO (AM080/090FXMDGH666) ................................................................................ 14
3-2-2 DVM S ECO (AM080FXMDGH666,AM080FXMDGC666)............................................ 28
3-3 Precaution when replace the compressor........................................................................................... 47
3-4 EEV KIT................................................................................................................................................................. 49
4. Troubleshooting..........................................................................................50
4-1 Service Operation........................................................................................................................................... 50
4-1-1 Special Operation ............................................................................................................................. 50
4-2 Appropriate Measures for Different Symptom .................................................................................. 61
5. PCB Diagram and Parts List .....................................................................111
5-1 ASS'Y PCB MAIN ...........................................................................................................................................111
5-2 ASS’Y PCB INVERTER....................................................................................................................................114
5-3 ASS’Y PCB EMI ...............................................................................................................................................116
5-4 SUB-COMM ....................................................................................................................................................117
6. Wiring Diagram .........................................................................................118
6-1 AM080/090FXMDGH66, AM080MXMDGH666 ..........................................................................118
7. Cycle Diagram ....................................................................................................... 119
7-1 Main heating operation(H/P)...................................................................................................................119
7-2 Cycle Component Function Explanation............................................................................................121

Section 0
Samsung Electronics 3
Contents
8. Key Options ...............................................................................................122
8-1 Outdoor unit option switch settings....................................................................................................122
9. Reference Sheet ........................................................................................123
9-1 Model code index.........................................................................................................................................123

4Samsung Electronics
1. Precautions
1-1 Precautions for the Service
O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.
OFully repair the connection for the types of harness when repairing the product after breakdown.
– A faulty connection can cause irregular noise and problems.
O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.
O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.
O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.
O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
O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.
O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.
O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
ODo not pull or touch the power plug or the subsidiary power switch with wet hands.
– This may result in electric shock or fire.
OIf the power line or the power plug is damaged, then it must be changed since this is a hazard.
O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.
OThe use of multiple electric outlets should be prohibited.
– This may result in electric shock or fire.
O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.
OUnplug the power or turn off the subsidiary power switch when changing or repairing electrical parts.
– Doing so will prevent electric shock.
O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.

Samsung Electronics 5
1-4 Precautions for Handling Refrigerant for Air Conditioner
OEnvironmental Cautions: Air pollution due to gas release
O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.
O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
ODangerous or flammable objects around the pipe must be removed before the welding.
O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.
O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
O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.
O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.
O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
O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.

6Samsung Electronics
2. Product Specifications
2-1 The Feature of Product
2-1-1 Feature
Q Dual SSC System Technology
When load changes, capacity amendment that is soft by continuous operation of Dual Inverter is available.
Q Dual Smart Inverter System
DSC System
Digital base Inverter base
. DVI variable + DVI constant speed
. AC Motor
. 2 generation, Vapor Injection
. Dual Smart Inverter : SSC + SSC
. BLDC Inverter Motor (20~160Hz driving)
. 3 generation, Vapor Injection
(Performance maximization of low temperature heating)
DSI System
High Pressure Refrigerant Outlet
Medium Pressure
Refrigerant Injection
Low Pressure
Refrigerant Inlet
Low Pressure
Refrigerant Inlet
3 generation,
Vapor Injection 3 generation,
Vapor Injection
Low Pressure
Refrigerant Inlet
High Pressure Refrigerant Outlet High Pressure Refrigerant Outlet
Medium Pressure
Refrigerant Inlet
Capacity
Variable
ŶCompressor driving : When load changes, is variable by fast inverter frequency.
ŶAmenities elevation : ᇹ0.5°C
Step 1
ON OFF
Step 2
Step 3 Step 4
ON OFF
ON ON ON ON

Product Specications
Samsung Electronics 7
Feature
(cont.)
QInverter circuit refrigerant cooling technology
Applied high eciency refrigerant cooling circuit. Secured stable Inverter PCB cooling performance.
- Air cooling method : When natural convection / electric heat performance is low and is high load, eciency is fallen.
- Refrigerant cooling system : Forced circulation / electric heat performance is high and control of (thermal conductivity is
10 times higher than air) load is available.
Cooling of
inverter circuit
Refrigerant cooling system :
It is cooling technology of inverter circuit that use
refrigerating cycle technology.

Product Specications
8Samsung Electronics
2-1-2 Changes in comparison to basic mode
Changed
part
Changed item
and feature Basic After changed
Main PCB
Change Main PCB
- Separation for load / control.
- Option resistance delete by model.
(standardization)
- When do PCB replace, need
option download.
Inverter PCB
(Compressor
Control PCB)
Applied inverter Compressor
- Refrigerant cooling method
- Magnet S/W
ױDid Power Relay mount to
PCB. ←EMI PCB 3 phase power EMI PCB
- Fuse mount ←Communication
Terminal block
Did Communication Terminal block
mount to PCB. ←
Q AM080/090FXMDGH66,AM080MXMDGH666,AM080MXMDGC666

Product Specications
Samsung Electronics 9
2-1-3 Structure of product (DVM S ECO)
Motor / Fan
4Way V/V
Accumulator
Plate Heat Exchanger
Gas Pipe
Liquid Pipe
Compressor
Heat Exchanger
Control Box
Oil Separator
( Not available on cooling only model. )

10 Samsung Electronics
Model New Model
AM080FXMDGH
6
AM090FXMDGH
6
TYPE
Model
HP HP
Power
Ø,V,Hz
3/AC380~415/50 3/AC380~415/50
Capacity Cooling
kW 22.4 24.1
Heating
kW 25.0 26.0
Power
RunningCurrent
Cooling 1)
A 9.66 11.65
Heating 2)
A 8.24 9.01
Max.
A 18.00 18.50
MCA A 18.00 18.50
MFA A 25 25
Power Input (normal)
Cooling 1)
kW 5.72 6.90
Heating 2)
kW 4.88 5.34
Max.
kW 11.25 11.81
Compressor
Model
- DS-GB052FAVADO*1 DS-GB052FAVADO*1
Output
kW 4.7 4.7
Lubricant Type
- FVC68D FVC68D
Charging
L 1.7 1.7
Refrigerant Type
- R-410A R-410A
Factory Charging
kg 3.7 3.7
Fan
Type
- Propeller + BLDC Propeller + BLDC
Motor Output
W 630 630
Airow rate
㎥/
min 135 145
Safety Devices
Mechnanical
-
High Pressure Switch High Pressure Switch
- Crankcase Heater Crankcase Heater
- PCB Fuse PCB Fuse
Electronic
-
Overvoltage protection Overvoltage protection
- Current transformers Current transformers
-
Motor overheating /
Current transformers
Motor overheating / Cur-
rent transformers
Pipe
Piping connections
Liquid Ø,mm 9.52 9.52
Gas Ø,mm 19.05 19.05
Installation Limitation
Max.
Length m 200 200
Max.
Height m30 30
Cable
Main power
(Below/about 20m) ㎟4(H07RN) 4(H07RN)
Communication ㎟VCTF 0.75~1.5(2P) VCTF 0.75~1.5(2P)
Set Dimension
Net Weight kg 135 135
Shipping Weight kg 140 140
Net Dimension (WxHxD) mm 940x1420x330 940x1420x330
Gross Dimension (WxHxD) mm 995x1578x426 995x1578x426
Operating Temp
Range
Cooling ℃-5 ~ 48 -5 ~ 48
Heating ℃-20 ~ 24 -20 ~ 24
2-2 Product Specifications
2-2-1 Outdoor Unit
1. Proper form capacity standard of air conditioning
- Cooling capacity : It is figures that appear in indoor 27˚C DB/19°C WB, outdoor 35˚C DB, length 7.5m of piping, fall 0m standard.
- Heating capacity : It is figures that appear in indoor 20˚C DB, outdoor 7˚C DB, length 7.5m of piping, fall 0m standard.
2. If proper form heating capacity is outdoor temperature 7˚C standard and outdoor temperature goes down by below zero, heating capacity can drop according to temperature condition.
3. Need special load calculation in case of use by main heating in the winter, and please buy product for low temperature that heating effect excels at low temperature.
4. Maximum length between outdoor and indoor units allows up to 200m (Equivalent length 220m).
5. If the indoor unit is below, height length allows up to 110m (If over 50m, decide whether to install the PDM kit). If the outdoor unit is below, allowable height length is 40m.

Samsung Electronics 11
Outdoor Unit (cont.)
Model New Model
AM080MXMDGH6AM080MXMDGC6
TYPE
Model
HP CO
Power
Ø,V,Hz
3/AC380~415/50 3/AC380~415/50
Capacity Cooling
kW 22.4 22.4
Heating
kW 22.4 -
Power
RunningCurrent
Cooling 1)
A 9.5 9.5
Heating 2)
A 11.7 -
Max.
A 18.4 -
MCA A 18.4 18.4
MFA A 25.0 25.0
Power Input (normal)
Cooling 1)
kW 6.9 6.9
Heating 2)
kW 5.8 -
Max.
kW 11.14 11.14
Compressor
Model
- UG5T520FUBJX UG5T520FUBJX
Output
kW - -
Lubricant Type
- PVE PVE
Charging
L 1.7 1.7
Refrigerant Type
- R-410A R-410A
Factory Charging
kg 3.7 3.7
Fan
Type
- Propeller + BLDC Propeller + BLDC
Motor Output
W 630 630
Airow rate
㎥/
min 135 135
Safety Devices
Mechnanical
-
High Pressure Switch High Pressure Switch
- Crankcase Heater Crankcase Heater
- PCB Fuse PCB Fuse
Electronic
-
Overvoltage protection Overvoltage protection
- Current transformers Current transformers
-
"Motor overheating /
Current transformers"
"Motor overheating /
Current transformers"
Pipe
Piping connections
Liquid Ø,mm 9.52 9.52
Gas Ø,mm 19.05 19.05
Installation Limitation
Max.
Length m 100 100
Max.
Height m30 30
Cable
Main power
(Below/about 20m) ㎟4(H07RN) 4(H07RN)
Communication ㎟VCTF 0.75~1.5(2P) VCTF 0.75~1.5(2P)
Set Dimension
Net Weight kg 115 115
Shipping Weight kg 125 125
Net Dimension (WxHxD) mm 940x1420x330 940x1420x330
Gross Dimension (WxHxD) mm 995x1578x426 995x1578x426
Operating Temp
Range
Cooling ℃-5 ~ 48 -5 ~ 48
Heating ℃-20 ~ 24 -
1. Proper form capacity standard of air conditioning
- Cooling capacity : It is figures that appear in indoor 27˚C DB/19°C WB, outdoor 35˚C DB, length 7.5m of piping, fall 0m standard.
- Heating capacity : It is figures that appear in indoor 20˚C DB, outdoor 7˚C DB, length 7.5m of piping, fall 0m standard.
2. If proper form heating capacity is outdoor temperature 7˚C standard and outdoor temperature goes down by below zero, heating capacity can drop according to temperature condition.
3. Need special load calculation in case of use by main heating in the winter, and please buy product for low temperature that heating effect excels at low temperature.
4. Maximum length between outdoor and indoor units allows up to 200m (Equivalent length 220m).
5. If the indoor unit is below, height length allows up to 110m (If over 50m, decide whether to install the PDM kit). If the outdoor unit is below, allowable height length is 40m.

12 Samsung Electronics
2-3 Accessory and Option Specifications
2-3-1 Accessories
Picture Classification Model Name Remark
Y-Joint
MXJ-YA1509M
15.0 kW and below
MXJ-YA2512M
Over 15.0 kW~40.6 kW and below
MXJ-YA2812M
Over 40.6 kW~46.4 kW and below
MXJ-YA2815M
Over 46.4 kW~69.6 kW and below
MXJ-YA3419M
Over 69.6 kW~98.6 kW and below
MXJ-YA4119M
Over 98.6 kW~139.2 kW and below
MXJ-YA4422M
Over 139.2 kW
Y-Joint
(Only H/R)
MXJ-YA1500M
23.2 kW and below
MXJ-YA2500M
Over 23.2 kW~69.6 kW and below
MXJ-YA3100M
Over 69.6 kW~139.2 kW and below
MXJ-YA3800M
139.2 kW and below
Distribution header
MXJ-HA2512M
46.4 kW and below (for 4 rooms)
MXJ-HA3115M
69.6 kW and below (for 8 rooms)
MXJ-HA3819M
Over 69.6 kW (for 8 rooms)
Y-Joint -Outdoor Unit
MXJ-TA3819M
139.2 kW and below
MXJ-TA4422M
145 kW and below
Y-Joint
(Only H/R)-Outdoor Unit
MXJ-TA3100M
139.2 kW and below
MXJ-TA3800M
145 kW and Over
MCU
(Mode Control Unit)
MCU-S6NEE1N
6 ROOM
MCU-S4NEE1N
4 ROOM
MCU-S4NEE2N
4 ROOM
EEV KIT (1 Room)
MEV-E24SA
Applty to products without EEV
(Wall mount & Ceiling)
MEV-E32SA
EEV KIT (2 Room)
MXD-E24K132A
MXD-E24K200A
MXD-E32K200A
MXD-E24K232A
EEV KIT (3 Room)
MXD-E24K132A
MXD-E24K300A
MXD-E32K224A
MXD-E32K300A

Samsung Electronics 13
3-1 Necessary Tools
3. Disassembly and Reassembly
OFor “disassembly and assembly” DVM PLUS Ⅳindoor unit, please refer to the products with the same structures.
Only those products that are not specified elsewhere are described here.
Item Remark
+SCREW DRIVER
MONKEY SPANNER
-SCREW DRIVER
NIPPER
ELECTRIC MOTION DRIVER
L-WRENCH

Disassembly and Reassembly
14 Samsung Electronics
No. Parts Procedure Remark
1 Cabi Front Right Make sure the power is disconnected
before work.
1) Remove 3 screws. (use "+" screw driver)
2 Top Cover 1) Remove 8 screws around cover.
(use "+" screw driver)
3 Cabi Front Install 1) Remove 1 screws (use "+" screw driver)
and lift up to take off.
3-2 Disassembly and Reassembly
3-2-1 DVM S ECO (AM080/090FXMDGH666)

Disassembly and Reassembly
Samsung Electronics 15
No. Parts Procedure Remark
4 Guard Cond 1)
Take off the sensor.
2) Remove 4 screws. (use "+" screw driver)
5 CABI BACK RIGHT 1) Take out the sensor wire through the hole
on cabinet.
2) Remove 10 screws. (use "+" screw driver)

Disassembly and Reassembly
16 Samsung Electronics
No. Parts Procedure Remark
5 CABI BACK RIGHT
6 Cabi Back Install 1) Remove 1 screw. (using "+" screw driver)

Disassembly and Reassembly
Samsung Electronics 17
No. Parts Procedure Remark
7 Cabi Front LF 1)
Remove 10 screws. (using "+" screw driver)

Disassembly and Reassembly
18 Samsung Electronics
No. Parts Procedure Remark
8 Fan Propeller 1)
Remove nut, take out the fan.
(using wrench turn clockwise)
9 Motor 1) Remove 4 screws, take off the motor.
(using "+" screw driver)
2) Pull out the connector on main pcb board.
10 Bracket motor 1) Remove 2 screws to take off bracket cond.
(using "+" screw driver)
2) Remove 2 screws on the base.
(using "+" screw driver)

Disassembly and Reassembly
Samsung Electronics 19
No. Parts Procedure Remark
11 Control Box 1)
Pull out all the connector on the pcb board
Quantity of the connector is different
with different model
2) Remove the screw which is fixed comp
power wire. (using "+" screw driver)
3) Remove the screw which is fixed comp
power wire. (using "+" screw driver)
The follow step can be divided into 2 case
4) Case 1:Take off the control box directly
without welding,
a) Remove 2 screws that fix ing reactorwire.
(using "+" screw driver)
b) Pull out the connector as right pic.

Disassembly and Reassembly
20 Samsung Electronics
No. Parts Procedure Remark
11 Control Box
c) Pull out the connector of the wire
that supply single-phase power to
inverter pcb. (Reffer right pic)
d) Pull out the connector of the wire
that supply three-phase power to
power pcb. (Reffer right pic)
e) Remove 2 screws that fixing IGBT
with heatsink,and 2 screws that fix-
ing pcb case.
f) Band the handel of the case and
take off the assy inverter pcb.
(Reffer right pic)
Becareful when take off inverter
pcb;when reassemble should
ensure the silicon grease thin and
even