MDV MDSF-07HRN1 User manual

FAIRWIND ON-OFF SERIES
Service Manual 2014

CONTENTS
1. Precaution.................................................................................................................................................... 3
1.1 Safety Precaution ........................................................................................................................3
1.2 Warning .......................................................................................................................................3
2. Function........................................................................................................................................................ 7
3. Dimension .................................................................................................................................................... 9
3.1 Indoor Unit...................................................................................................................................9
3.2 Outdoor Unit ..............................................................................................................................14
4. Refrigerant Cycle Diagram ....................................................................................................................... 16
5. Wiring Diagram.......................................................................................................................................... 18
5.1 Indoor Unit.................................................................................................................................18
5.2 Outdoor Unit ..............................................................................................................................28
6 Installation Details...................................................................................................................................... 40
6.1 Wrench torque sheet for installation ..........................................................................................40
6.2 Connecting the cables...............................................................................................................40
6.3 Pipe length and the elevation ....................................................................................................41
6.4 Installation for the first time........................................................................................................44
6.5 Adding the refrigerant after running the system for many years ................................................48
6.6 Re-installation while the indoor unit need to be repaired...........................................................49
6.7 Re-installation while the outdoor unit need to be repaired.........................................................51
7. Operation Characteristics......................................................................................................................... 54
8. Electronic function.................................................................................................................................... 55
8.1 Abbreviation ..............................................................................................................................55
8.2 Display function.........................................................................................................................55
8.3 Main Protection .........................................................................................................................56
8.4 Operation Modes and Functions ...............................................................................................57
9. Troubleshooting......................................................................................................................................... 73
9.1 Indoor Unit Error Display ...........................................................................................................73
9.2 Diagnosis and Solution..............................................................................................................74

1. Precaution
1.1 Safety Precaution
To prevent injury to the user or other people and property damage, the following
instructions must be followed.
Incorrect operation due to ignoring instruction will cause harm or damage.
Before service the unit, be sure to read this service manual at first.
1.2 Warning
Installation
Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated
circuit.
There is risk of fire or electric shock.
For electrical work, contact the dealer, seller, a qualified electrician, or an authorized
service center.
Do not disassemble or repair the product, there is risk of fire or electric shock.
Always ground the product.
There is risk of fire or electric shock.
Install the panel and the cover of control box securely.
There is risk of fire of electric shock.
Always install a dedicated circuit and breaker.
Improper wiring or installation may cause fore or electric shock.
Use the correctly rated breaker of fuse.
There is risk of fire or electric shock.
Do not modify or extend the power cable.
There is risk of fire or electric shock.
Do not install, remove, or reinstall the unit by yourself (customer).
There is risk of fire, electric shock, explosion, or injury.
Be caution when unpacking and installing the product.
Sharp edges could cause injury, be especially careful of the case edges and the fins on the

condenser and evaporator.
For installation, always contact the dealer or an authorized service center.
Do not install the product on a defective installation stand.
Be sure the installation area does not deteriorate with age.
If the base collapses, the air conditioner could fall with it, causing property damage, product failure,
and personal injury.
Do not let the air conditioner run for a long time when the humidity is very high and a
door or a window is left open.
Take care to ensure that power cable could not be pulled out or damaged during
operation.
There is risk of fire or electric shock.
Do not place anything on the power cable.
There is risk of fire or electric shock.
Do not plug or unplug the power supply plug during operation.
There is risk of fire or electric shock.
Do not touch (operation) the product with wet hands.
Do not place a heater or other appliance near the power cable.
There is risk of fire and electric shock.
Do not allow water to run into electrical parts.
It may cause fire, failure of the product, or electric shock.
Do not store or use flammable gas or combustible near the product.
There is risk of fire or failure of product.
Do not use the product in a tightly closed space for a long time.
Oxygen deficiency could occur.
When flammable gas leaks, turn off the gas and open a window for ventilation before
turn the product on.
If strange sounds or smoke comes from product, turn the breaker off or disconnect the
power supply cable.
There is risk of electric shock or fire.
Stop operation and close the window in storm or hurricane. If possible, remove the
product from the window before the hurricane arrives.

There is risk of property damage, failure of product, or electric shock.
Do not open the inlet grill of the product during operation. (Do not touch the electrostatic
filter, if the unit is so equipped.)
There is risk of physical injury, electric shock, or product failure.
When the product is soaked, contact an authorized service center.
There is risk of fire or electric shock.
Be caution that water could not enter the product.
There is risk of fire, electric shock, or product damage.
Ventilate the product from time to time when operating it together with a stove etc.
There is risk of fire or electric shock.
Turn the main power off when cleaning or maintaining the product.
There is risk of electric shock.
When the product is not be used for a long time, disconnect the power supply plug or
turn off the breaker.
There is risk of product damage or failure, or unintended operation.
Take care to ensure that nobody could step on or fall onto the outdoor unit.
This could result in personal injury and product damage.
CAUTION
Always check for gas (refrigerant) leakage after installation or repair of product.
Low refrigerant levels may cause failure of product.
Install the drain hose to ensure that water is drained away properly.
A bad connection may cause water leakage.
Keep level even when installing the product.
It can avoid vibration of water leakage.
Do not install the product where the noise or hot air from the outdoor unit could damage
the neighborhoods.
It may cause a problem for your neighbors.
Use two or more people to lift and transport the product.
Do not install the product where it will be exposed to sea wind (salt spray) directly.
It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins,

could cause product malfunction or inefficient operation.
Operational
Do not expose the skin directly to cool air for long time. (Do not sit in the draft).
Do not use the product for special purposes, such as preserving foods, works of art etc.
It is a consumer air conditioner, not a precision refrigerant system.
There is risk of damage or loss of property.
Do not block the inlet or outlet of air flow.
Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.
There is risk of fire, electric shock, or damage to the plastic parts of the product.
Do not touch the metal parts of the product when removing the air filter. They are very
sharp.
Do not step on or put anything on the product. (outdoor units)
Always insert the filter securely. Clean the filter every two weeks or more often if
necessary.
A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or
damage.
Do not insert hands or other objects through air inlet or outlet while the product is
operated.
Do not drink the water drained from the product.
Use a firm stool or ladder when cleaning or maintaining the product.
Be careful and avoid personal injury.
Replace the all batteries in the remote control with new ones of the same type. Do not
mix old and new batteries or different types of batteries.
There is risk of fire or explosion.
Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire.
They may burn of explode.
If the liquid from the batteries gets onto your skin or clothes, wash it well with clean
water. Do not use the remote of the batteries have leaked.

MDSF-07HRN1 MDSF-09HRN1
MDSF-07HRN1 MDSF-09HRN1
MDOF-07HN1 MDOF-09HN1
Ph-V-Hz 220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph
Capacity Btu/h 7500 9000
Input W 685 820
Rated current A 3,2 3,8
EER W/W 3,21 3,21
Capacity Btu/h 8000 9500
Input W 640 770
Rated current A 3.0 3.6
COP W/W 3,66 3,62
L/h 0.8 1.0
W1050 1200
A 5.5 6.0
A 16.1 21.7
Model ASN82V1UDZ PA103M1C-4DZDE2
Type ROTARY ROTARY
Brand GMCC GMCC
Capacity Btu/h 6995/7029 8428/8530
Input W 702/735 830/860
Rated current(RLA) A 3.21/3.15 3.85/3.73
Locked rotor Amp(LRA) A 16.1 21.7
Thermal protector ----- B160-135-241E
Thermal protector position EXTERNAL EXTERNAL
Capacitor uF 25 25
Refrigerant oil/oil charge ml ESTEL OIL VG74/300 ESTER OIL VG74 350cc
Model RPG13H RPG13H
Brand Welling Welling
Input W 34 34
Capacitor uF 1.2 1.2
Speed(Hi/Mi/Lo) r/min 1200 / 950 / 800 1250 / 1000 / 800
a.Number of rows 1/2 1/2
b.Tube pitch(a)x row pitch(b) mm 20x11.28 20x11.28
c.Fin spacing mm 1.2/1.3 1.2/1.3
d.Fin type (code) Hydrophilic aluminium Hydrophilic aluminium
e.Tube outside dia.and type mm Φ6,innergroove tube Φ6,innergroove tube
f.Coil length x height x width mm 540x80x11.28+540x180x22.56 540x80x11.28+540x180x22.56
g.Number of circuits 2 2
m3/h 460/360/300 460/360/300
dB(A) 40/33/30 41/33/29
Dimension(W*D*H) mm 715x188x250 715x188x250
Packing (W*D*H) mm 775x260x324 775x260x324
Net/Gross weight Kg 6.5 / 8.5 6.5 / 8.5
Model YDK24-6F(B) YDK24-6T(B)
Brand Welling Welling
Input W 63 70
Capacitor uF 2.5 3.0
Speed r/min 800 / -- / -- 815 / -- / --
a.Number of rows 1 1
b.Tube pitch(a)x row pitch(b) mm 21x13.37 21x13.37
c.Fin spacing mm 1.4 1.4
d.Fin type (code) Hydrophilic aluminium Hydrophilic aluminium
e.Tube outside dia.and type mm Φ7,innergroove tube Φ7,innergroove tube
f.Coil length x height x width mm 600x504x13.37 694x504x13.37
g.Number of circuits 2 1
m3/h 1800 1650
dB(A) 55 55
Dimension(W*D*H) mm 700x240x540 700x240x540
Packing (W*D*H) mm 815x325x580 815x325x580
Net/Gross weight Kg 22 / 24 24.5 / 26.5
g R410A/520g R410A/590g
MPa 4.2/1.5 4.2/1.5
Liquid side/ Gas side mm(inch) Φ6.35/Φ9.52(1/4"/3/8") Φ6.35/Φ9.52(1/4"/3/8")
Max. refrigerant pipe length m 20 20
Max. difference in level m 8 8
Remote Control Remote Control
℃17~30 17~30
Indoor(cooling/ heating) ℃17～32/0～30 17～32/0～30
Outdoor(cooling/heating) ℃18～43/-7～24 18～43/-7～24
Thermostat type
Operation temperature
Room
temperature
Outdoor noise level
Outdoor unit
Refrigerant type
Design pressure
Refrigerant piping
Indoor noise level (Hi/Mi/Lo)
Indoor unit
Outdoor fan
motor
Outdoor coil
Outdoor air flow
Model
Indoor
Indoor air flow (Hi/Mi/Lo)
Outdoor
Power supply
Cooling
Heating
Moisture Removal
Max. input consumption
Max. current
Starting current
Compressor
Indoor fan motor
Indoor coil
3. Function

MDSF-12HRN1 MDSF-18HRN1
MDSF-12HRN1 MDSF-18HRN1
MDOF-12HN1 MDOF-18HN1
Ph-V-Hz 220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph
Capacity Btu/h 11500 18000
Input W 1050 1640
Rated current A 4.5 7,6
EER W/W 3.21 3,21
Capacity Btu/h 12000 19000
Input W 975 1540
Rated current A 4.2 7.1
COP W/W 3.61 3,62
L/h 1.1 1.8
W1800 2200
A 8.0 12.0
A 25.1 31.8
Model PA130G1C-4FTL PA200M2CS-4KU2
Type ROTARY ROTARY
Brand GMCC GMCC
Capacity Btu/h 12505/12556 16581
Input W 885/920 1605
Rated current(RLA) A 4.10/3.90 7.45
Locked rotor Amp(LRA) A 25.1 31.8
Thermal protector --- ----
Thermal protector position INTERNAL INTERNAL
Capacitor uF 35 45
Refrigerant oil/oil charge ml ESTER OIL VG74 · 400 ml ESTER OIL VG74 750cc
Model RPG20E RPG28D
Brand Welling Welling
Input W 45 58
Capacitor uF 1.5 1.5
Speed(Hi/Mi/Lo) r/min 1200 / 1050 / 800 1280/1100/800
a.Number of rows 1/2 2
b.Tube pitch(a)x row pitch(b) mm 21x13.37 21x13.37
c.Fin spacing mm 1.2 1.2
d.Fin type (code) Hydrophilic aluminium Hydrophilic aluminium
e.Tube outside dia.and type mm Φ7,innergroove tube Φ7,innergroove tube
f.Coil length x height x width mm 621x84x13.37+621x210x26.74 750x294x26.74
g.Number of circuits 3 3
m3/h 580/500/400 800/700/500
dB(A) 40/36/30 45/40/33
Dimension(W*D*H) mm 800x188x275 940x205x275
Packing (W*D*H) mm 865x265x350 1015x265x350
Net/Gross weight Kg 8 / 10 10 / 12.5
Model YDK36-6 YDK48-6H(A)
Brand Welling Welling
Input W 70 110
Capacitor uF 2.5 3.0
Speed r/min 900 / -- / -- 890 / -- / --
a.Number of rows 1 2
b.Tube pitch(a)x row pitch(b) mm 22x19.05 21x13.37
c.Fin spacing mm 1.4 1.4
d.Fin type (code) Hydrophilic aluminium Hydrophilic aluminium
e.Tube outside dia.and type mm Φ7.94, innergroove tube Φ7,innergroove tube
f.Coil length x height x width mm 740x506x19.05 660x546x26.74
g.Number of circuits 2 3
m3/h 1800 2300
dB(A) 56 60
Dimension(W*D*H) mm 780x250x540 760x285x590
Packing (W*D*H) mm 910x335x585 887x355x645
Net/Gross weight Kg 28 / 30 36.5 / 39
g R410A/800g R410A/1150g
MPa 4.2/1.5 4.2/1.5
Liquid side/ Gas side mm(inch) Φ6.35/Φ12.7(1/4"/1/2") Φ6.35/Φ12.7(1/4"/1/2")
Max. refrigerant pipe length m 20 25
Max. difference in level m 8 10
Remote Control Remote Control
℃17~30 17~30
Indoor(cooling/ heating) ℃17～32/0～30 17～32/0～30
Outdoor(cooling/heating) ℃18～43/-7～24 18～43/-7～24
Design pressure
Refrigerant piping
Thermostat type
Operation temperature
Room
temperature
Outdoor coil
Outdoor air flow
Outdoor noise level
Outdoor unit
Refrigerant type
Indoor coil
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Indoor unit
Outdoor fan
motor
Max. input consumption
Max. current
Starting current
Compressor
Indoor fan motor
Outdoor
Power supply
Cooling
Heating
Moisture Removal
Model
Indoor

MDSF-24HRN1
MDSF-24HRN1
MDOF-24HN1
Ph-V-Hz 220-240V~ 50Hz, 1Ph
Capacity Btu/h 24000
Input W 2330
Rated current A 10,8
EER W/W 3,02
Capacity Btu/h 25000
Input W 2140
Rated current A 9,9
COP W/W 3,42
L/h 2.6
W4000
A 20.0
A60
Model PA270G2CS-4MU1
Type ROTARY
Brand GMCC
Capacity Btu/h 23287/23458
Input W 2235/2385
Rated current(RLA) A 10.55/11.15
Locked rotor Amp(LRA) A 60
Thermal protector ---
Thermal protector position INTERNAL
Capacitor uF 60
Refrigerant oil/oil charge ml ESTER OIL VG74/850 CC
Model RPG45C
Brand Welling
Input W 77
Capacitor uF 3.0
Speed(Hi/Mi/Lo) r/min 1180 / 1100 / 900
a.Number of rows 2
b.Tube pitch(a)x row pitch(b) mm 21x13.37
c.Fin spacing mm 1.3
d.Fin type (code) Hydrophilic aluminium
e.Tube outside dia.and type mm Φ7,innergroove tube
f.Coil length x height x width mm 780x315x26.74
g.Number of circuits 5
m3/h 1150/1050/900
dB(A) 48/45/41
Dimension(W*D*H) mm 1045x235x315
Packing (W*D*H) mm 1135x395x315
Net/Gross weight Kg 12 / 15
Model YDK53-6C
Brand Welling
Input W 136
Capacitor uF 3.0
Speed r/min 800
a.Number of rows 2
b.Tube pitch(a)x row pitch(b) mm 21x13.37
c.Fin spacing mm 1.4
d.Fin type (code) Hydrophilic aluminium
e.Tube outside dia.and type mm Φ7,innergroove tube
f.Coil length x height x width mm 785x651x26.74
g.Number of circuits 4
m3/h 2700
dB(A) 58
Dimension(W*D*H) mm 845x320x700
Packing (W*D*H) mm 965x395x755
Net/Gross weight Kg 49 / 52
g R410A/1690g
MPa 4.2/1.5
Liquid side/ Gas side mm(inch) Φ9.52/Φ15.9(3/8"/5/8")
Max. refrigerant pipe length m 25
Max. difference in level m 10
Remote Control
℃17~30
Indoor(cooling/ heating) ℃17～32/0～30
Outdoor(cooling/heating) ℃18～43/-7～24
Operation temperature
Room
temperature
Outdoor unit
Refrigerant type
Design pressure
Refrigerant piping
Thermostat type
Indoor unit
Outdoor fan
motor
Outdoor coil
Outdoor air flow
Outdoor noise level
Compressor
Indoor fan motor
Indoor coil
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Heating
Moisture Removal
Max. input consumption
Max. current
Starting current
Model
Indoor
Outdoor
Power supply
Cooling

MDSF-28HRN1
MDSF-28HRN1
MDOF-28HN1
Ph-V-Hz 220-240V- 50Hz, 1Ph
Capacity Btu/h 28000
Input W 2920
Rated current A 12.4
EER W/W 2,81
Capacity Btu/h 30000
Input W 2735
Rated current A 11.5
COP W/W 3,21
W4200
A22
A 74.5
Model PA331X3CS-4MU1
Type ROTARY
Brand GMCC
Capacity Btu/h 27944/28047
Input W 2725/2880
Rated current(RLA) A 13/13.95
Locked rotor Amp(LRA) A 74.5
Thermal protector ----
Thermal protector position INTERNAL
Capacitor uF 55
Refrigerant oil/oil charge ml ESTEL OIL VG74 .1100
Model RPG45C
Input W 72
Capacitor uF 3.0
Speed(Hi/Mi/Lo) r/min 1200 / 1100 / 900
a.Number of rows 2
b.Tube pitch(a)x row pitch(b) mm 21x13.37
c.Fin spacing mm 1.3
d.Fin type (code) Hydrophilic aluminium
e.Tube outside dia.and type mm Φ7. innergroove tube
f.Coil length x height x width mm 780x336x26.74
g.Number of circuits 4
m3/h 1110/985/770
dB(A) 50/45/40
Dimension(W*D*H) mm 1045x235x315
Packing (W*D*H) mm 1135x395x315
Net/Gross weight Kg 13.1/16.3
Model YDK100-6D
Input W 167.2
Capacitor uF 5.0
Speed r/min 900 / -- / --
a.Number of rows 2
b.Tube pitch(a)x row pitch(b) mm 22x19.05
c.Fin spacing mm 1
d.Fin type (code) Hydrophilic aluminium
e.Tube outside dia.and type mm Φ7.94, inner groove tube
f.Coil length x height x width mm 770x660x38.1
g.Number of circuits 4
dB(A) 63
Dimension(W*D*H) mm 845x320x700
Packing (W*D*H) mm 965x395x755
Net/Gross weight Kg 52.8/56.6
g R410A/2000g
MPa 4.2/1.5
Liquid side/ Gas side mm(inch) Φ9.52/Φ15.9(3/8"/5/8")
Max. refrigerant pipe length m 25
Max. difference in level m 10
Remote Control
℃17-30
Indoor(cooling/ heating) ℃17-32/0-30
Outdoor(cooling/heating) ℃18-43/-7-24
Refrigerant piping
Thermostat type
Operation temperature
Room temperature
Design pressure
Compressor
Indoor fan motor
Indoor coil
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Indoor unit
Outdoor fan motor
Outdoor coil
Outdoor noise level
Outdoor unit
Refrigerant type
Starting current
Model
Indoor
Outdoor
Power supply
Cooling
Heating
Max. input consumption
Max. current

MDSF-28HRN1 1045 235 315
MDSF-24HRN1 1045 235 315
MDSF-18HRN1 940 205 275
MDSF-12HRN1 800 188 275
MDSF-09HRN1 715 188 250
MDSF-07HRN1 715 188 250
3. Dimension
3.1 Indoor Unit
WD
H
Model W D H

MDSF-28HRN1
MDSF-24HRN1
MDSF-18HRN1
MDSF-12HRN1
MSDF-09HRN1
MSDF-07HRN1
Model L(mm) R(mm) H(mm) Dimension of installation hole(mm)
85 88 45
￠65
100 95 45
110 100 45
293 163 45
293 163 45

MDOF-24(28)HN1 845 320 700 908 560 335
MDOF-18HN1 760 285 590 823 530 290
MDOF-12HN1 780 250 540 843 549 276
MDOF-09HN1 700 240 540 757 458 250
MDOF-07HN1 700 240 540 757 458 250
3.2 Outdoor Unit
More than 30cm
More than 60cm
More than 200cm
More than 30cm
More than 60cm
(Service space
︶
Fenceor
obstacles
Model W D H W1 A B

T3 temp. sensor is only for 24 and 28k
4. Refrigerant Cycle Diagram
For heat pump models:
LIQUID SIDE
GAS SIDE
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
2-WAY VALVE
3-WAY VALVE
4-WAY VALVE
COOLING
HEATING
T2 Evaporator
temp. sensor
T1 Room temp.
sensor
ACCUMULATOR
INDOOR OUTDOOR
CHECK VALVE
(Heating Model only)
CAPILIARY TUBE

MDSF-24HRN1-v/MDSF-28HRN1-vMDSF-24HRN1/MDSF-28HRN1
MDSF-07HRN1/MDSF-09HRN1/MDSF-12HRN1/MDSF-18HRN1
5. Wiring Diagram
5.1 Indoor Unit
CN6
CN3
CN2
RED
CN_TO
CN5
INDOOR MOTOR
INDOOR UNIT
TO OUTDOOR UNIT
1(L)
2(N)
S
CN_TIN
1 2 3 4 5 6 7 8
Y/G
BLUE
4-WAY TERMINAL
MAIN BOARD
2
1
1(2)3(4)
1(2)3(4)
2(4)
2
1
2
1
2
1
2
1
CN9 PLASAM
2
1
2
1
CN_L1 or CNL
M
~
Y/G 2
WHITE
CN_N1 or CNN
CN_S
FAN CAPACITOR BOARD
PC1_1 PC2_1
1 2 3 4 5
SWING MOTOR
M
5
1 2 3 4 5
CN10
This symbol indicates the element
is optional,the actual shape shall
be prevail.
Notes:
1 2 3 4 5
1 2 3 4 5
CN11
T1_room
T2_pipe
CN4
3
M
5
CN_HEAT
CNN
WHITE WHITE
TRANSFORMER
ION
CN_N3
CN_N2
CN_ION
Or Or
POWER BOARD
2
1
2
1
CN_ION
DISPLAY BOARD
Wire Contoller
2
OPTIONAL
CN3(CN301)
2

MDSF-07HRN1-v/MDSF-09HRN1-v/MDSF-12HRN1-v/MDSF-18HRN1-v
5.1 Indoor Unit
5.2 Outdoor Unit
MDOF-18HN1MDOF-07HN1/MDOF-09HN1/MDOF-12HN1

MDOF-28HN1
MDOF-24HN1
CT
TRANS1
COMP
CAP1
12
M
FAN2 VALVE KM1
BLUE
BLUE BLUE
BLUE
BLACK
BLACK
BLACK
BLACK
BLACK
WHITE
WHITE
RED
RED RED
RED
CAP2
12
RT3 XP1 XS1
CN4
CN3
UNIT1
CN 2
CN5
CN6
CN 11
RED
RED
RED
RED CS
R
BLACK
CN10
CN9
CN8
CN1
RED
BLACK
XT1
1N
L
S
2(N)
TO INDOOR UNIT
POWER SUPPLY
CODE
UNIT1
COMP
CAP1
CAP2
FAN2
XT1
Xt2
XP1,XS1
RT3
KM1
CT
TRANS1
CN1-CN11
PART NAME
OUTDOOR CONTROL PCB
COMPRESSOR
COMPRESSOR RUN CAPACITOR
OUTDOOR FAN CAPACITOR
OUTDOOR FAN
TERMINAL
MIDDLE TERMINAL
CONNECTORS
PIPE TEMPERATURE SENSOR
AC CONTACTOR
CURRENT INDUCTOR
TRANSFORMER
PCB SOCKETS
VALVE
REVERSING VALVE
Y/G
BLACK
PTCR
BLACK
OPTION
O.L.P
2
1
A1 A2
1Y/G
3
(OR BLACK)
CN15
CN16
1
3(5)
2
4(6)
CT
TRANS1
COMP
CAP1
12
M
FAN2 VALVE KM1
BLUE
BLUE BLUE
BLUE
BLACK
BLACK
BLACK
BLACK
BLACK
WHITE
WHITE
RED
RED RED
RED
CAP2
12
RT3 XP1 XS1
CN4
CN3
UNIT1
CN 2
CN5
CN6
CN 11
RED
RED
RED
RED CS
R
BLACK
CN10
CN9
CN8
CN1
RED
BLACK
XT1
1N
L
S
2(N)
O INDOOR UNIT
POWER SUPPLY
CODE
UNIT1
COMP
CAP1
CAP2
FAN2
XT1
XT2、XT3
XP1,XS1
RT3
KM1
CT
TRANS1
CN1-CN11
PART NAME
OUTDOOR CONTROL PCB
COMPRESSOR
COMPRESSOR RUN CAPACITOR
OUTDOOR FAN CAPACITOR
OUTDOOR FAN
TERMINAL
MIDDLE TERMINAL
CONNECTORS
PIPE TEMPERATURE SENSOR
AC CONTACTOR
CURRENT INDUCTOR
TRANSFORMER
PCB SOCKETS
VALVE
REVERSING VALVE
Y/G
BLACK
PTCR
BLACK
OPTION
O.L.P
2
1
A1 A2
1Y/G
3
(OR BLACK)
CN15
CN16
1
3
2
4
XT2
12
BLACK
MDOF-07HN1-v/MDOF-09HN1-v/MDOF-12HN1-v/MDOF-18HN1-v
112(N)2(N) 3344
BLUEBLUE
SS
RR
REDRED
CCBLACKBLACK
COMPRESSORCOMPRESSOR
OVERLOAD
RELAY
OVERLOAD
RELAY
BLACKBLACK
BLACKBLACK
4-WAY4-WAY
REDRED
COMPRESSOR
CAPACITOR
COMPRESSOR
CAPACITOR
FAN
MOTOR
FAN
MOTOR
BLUEBLUE
REDRED
FAN CAPACITORFAN CAPACITOR
REDRED
RED
RED
BLACK
BLACK CN1
CN2
TRANSFORMER
LOW TEMPERATURE
COOLING SYSTEM
TEMPERATURE
SENSOR
(LIN)
(N)
(LOUT)
(4WAY)
(N)
BLUE
BLUE(BLACK)BLUE(BLACK)
BLUE(BLACK)BLUE(BLACK)
C
L
H
RED
BLACK
GRAY(RED) RED
FUSE
CC

MDOF-24HN1-v
XT2
CURRENT INDUCTOR
TRANSFORMER
COMPRESSOR
CAP1
12
M
OUTDOOR FAN
REVERSING VALVE AC CONTACTOR
BLUE
BLUE
BLUE
BLACK
BLACK
BLACK
BLACK
BLACK
WHITE
WHITE
RED
RED RED
RED
CAP2
12
RT 3 SENSOR
CN4
CN3
OUTDOOR CONTROL PCB
CN2
CN6
CN11
RED
RED
RED
RED CS
R
BLACK
CN10
CN9
CN8
CN1
RED
RED
RED
XT1
1N
L
S
2(N)
TO INDOOR UNIT
POWER SUPPLY
Y/G
BLACK
PTCR
BLACK
OPTION
O.L.P
2
1
1
56
2
A1 A2
1Y/G
BLUE
CN1
CN2
RED
LOW TEMPERATURE
COOLING SYSTEM
BLACK
BLACK
RED
TEMPERATURE SENSOR
BLACK
BLUE
BLUE
XT3
C
L
H
D EF RO ST I N G
RED( )GRAY
T H E R M O S T A T
FUSE
RED
H EA TE R
RED( )GRAY
RED
CN5
BLACK
MDOF-28HN1-v
XT2
CURRENT INDUCTOR
TRANSFORMER
COMPRESSOR
CAP1
12
M
OUTDOOR FAN
REVERSING VALVE AC CONTACTOR
BLUE
BLUE
BLUE
BLACK
BLACK
BLACK
BLACK
BLACK
WHITE
WHITE
RED
RED RED
RED
CAP2
12
RT 3 SENSOR
CN4
CN3
OUTDOOR CONTROL PCB
CN2
CN6
CN11
RED
RED
RED
RED CS
R
BLACK
CN10
CN9
CN8
CN1
RED
RED
RED
XT1
1N
L
S
2(N)
TO INDOOR UNIT
POWER SUPPLY
Y/G
BLACK
PTCR
BLACK
OPTION
O.L.P
2
1
1
56
2
A1 A2
1Y/G
BLUE
CN1
CN2
RED
LOW TEMPERATURE
COOLING SYSTEM
BLACK
BLACK
RED
TEMPERATURE SENSOR
BLACK
BLUE
BLUE
XT3
C
L
H
D EF RO ST I N G
RED( )GRAY
T H E R M O S T A T
FUSE
RED
H EA TE R
RED( )GRAY
RED
CN5
BLACK

6 Installation Details
6.1 Wrench torque sheet for installation
Outside diameter Torque Additional tightening torque
mm inch N.cm N.cm
Ф6.35 1/4 1500(153kgf.cm) 1600(163kgf.cm)
Ф9.52 3/8 2500(255kgf.cm) 2600(265kgf.cm)
Ф12.7 1/2 3500(357kgf.cm) 3600(367kgf.cm)
Ф15.9 5/8 4500(459kgf.cm) 4700(479kgf.cm)
Ф19 3/4 6500(663kgf.cm) 6700(683kgf.cm)
6.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Rated current of appliance Nominal cross-sectional area (mm²)
>3 and ≤6 0.75
>6 and ≤10 1
>10 and ≤16 1.5
>16 and ≤25 2.5
The cable size and the current of the fuse or switch are determined by the maximum current indicated
on the nameplate which located on the side panel of the unit. Please refer to the nameplate before
selecting the cable, fuse and switch.

MDSF-28HRN1+MDOF-28HN1
MDSF-24HRN1+MDOF-24HN1
MDSF-18HRN1+MDOF-18HN1
MDSF-12HRN1+MDOF-12HN1
MDSF-09HRN1+MDOF-09HN1
MDSF-07HRN1+MDOF-07HN1
6.3 Pipe length and the elevation
The pipe length and refrigerant amount:
Model
Pipe size Standard
length
(m)
Max.
Elevation
B (m)
Max.
Length
A (m)
Additional
refrigerant
(g/m)
Gas Liquid
3/8’’
(
Ф9.52
)
1/4’’
(
Ф6.35
)
5 8 20 20
3/8’’
(
Ф9.52
)
1/4’’
(
Ф6.35
)
5 8 20 20
1/2’’
(
Ф12.7
)
1/4’’
(
Ф6.35
)
5 8 20 20
1/2’’
(
Ф12.7
)
1/4’’
(
Ф6.35
)
5 10 25 20
5/8’’
(
Ф15.9
)
3/8’’
(
Ф9.52
)
5 10 25 40
Caution:
The capacity test is based on the standard length and the maximum permissive length is based on the
system reliability.
The oil trap should be installed per 5-7 meters.