Midea MS11M-09HRN1 User manual

1
OASIS On-off SERIES
Service Manual 2012
DM12-01.01.09en
MS11M-09HRN1 / MO11M-09HN1
MS11M-12HRN1 / MO11M-12HN1
MS11M-18HRN1 / MO11M-18HN1
MS11M-24HRN1 / MO11M-24HN1

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CONTENTS
1. Precaution.................................................................................................................................................... 3
1.1 Safety Precaution ........................................................................................................................3
1.2 Warning .......................................................................................................................................3
2. Function........................................................................................................................................................ 7
3. Specification ................................................................................................................................................ 8
4. Dimension .................................................................................................................................................. 12
4.1 Indoor Unit.................................................................................................................................12
4.2 Outdoor Unit..............................................................................................................................14
5. Capacity tables .......................................................................................................................................... 15
6. Refrigerant Cycle Diagram ....................................................................................................................... 19
7. Wiring Diagram.......................................................................................................................................... 20
7.1 Indoor Unit.................................................................................................................................20
7.2 Outdoor Unit..............................................................................................................................22
8 Installation Details...................................................................................................................................... 24
8.1 Wrench torque sheet for installation ..........................................................................................24
8.2 Connecting the cables...............................................................................................................24
8.3 Pipe length and the elevation ....................................................................................................25
8.4 Installation for the first time .......................................................................................................26
8.5 Adding the refrigerant after running the system for many years ................................................29
8.6 Re-installation while the indoor unit need to be repaired...........................................................30
6.7 Re-installation while the outdoor unit need to be repaired.........................................................32
9. Operation Characteristics......................................................................................................................... 35
10. Electronic function.................................................................................................................................. 36
10.1 Abbreviation ............................................................................................................................36
10.2 Display function .......................................................................................................................36
10.3 Main Protection .......................................................................................................................37
10.4 Operation Modes and Functions .............................................................................................38
11. Troubleshooting....................................................................................................................................... 50
11.1 Indoor Unit Error Display .........................................................................................................50
11.2 Diagnosis and Solution............................................................................................................51

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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.

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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.

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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.

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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.

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2. Function
Model Names of Indoor/Outdoor Units
On-Off
Capacity Indoor units Outdoor units
9k MS11M-09HRN1 MO11M-09HN1
12k MS11M-12HRN1 MO11M-12HN1
18k MS11M-18HRN1 MO11M-18HN1
24k MS11M-24HRN1 MO11M-24HN1
Indoor unit
Filter
Killer of Formaldehyde
Plasma
Silver Ion Filter
Self-Clean
Follow Me
Auto restart
Sleep mode
Horizontal Swing Function
Louver Position Memory Function
Outdoor unit
Refrigerant Leakage Detect
Self-diagnostic Function
Hydrophilic Aluminum Fin
Anti-Rust Cabinet
Valve Protection Cover
Temperature compensation

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3. Specification
IndoorMS11M-09HRN1 MS11M-12HRN1
OutdoorMO11M-09HN1 MO11M-12HN1
PowersupplyPh‐V‐Hz220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph
Cooling
Capacity Btu/h9000 12000
kW2,64 3,52
Input W820 1090
Ratedcurrent A3.5 4.7
EER W/W3.22 3.23
Heating
Capacity Btu/h9500 12500
kW2,78 3,66
Input W770 1010
Ratedcurrent A3.35 4.4
COP W/W3.62 3.62
MoistureRemoval L/h1.0 1.2
Max.inputconsumption W1300 1800
Max.current A6.0 8.0
Startingcurrent A21.7 20.1
Compressor
Model  PA103M1C-4DZDE2 PA135G1C-4FTL
Type  ROTARY ROTARY
Brand  GMCC GMCC
Capacity Btu/h8428/8530 11191/11362
Input W830/860 1075/1100
Ratedcurrent(RLA) A3.85/3.73 5.37/5.39
LockedrotorAmp(LRA) A21.7 20.1
Thermalprotector  B160-135-241E ----
Thermalprotectorposition EXTERNAL INTERNAL
Capacitor uF25 35
Refrigerantoil/oilcharge mlESTER OIL VG74 350cc ESTER OIL VG74/400
Indoorfanmotor
Model  RPG13H RPG20D
Brand  Welling Welling
Input W34 43.3
Capacitor uF 1.2 1.5
Speed(Hi/Mi/Lo)r/min1200/1000/700 1220/1000/800
Indoorcoil
a.Numberofrows 2 2
b.Tubepitch(a)xrowpitch(b) mm21x13.37 21x13.37
c.Finspacing mm1.3 1.3
d.Fintype(code) Hydrophilic aluminium Hydrophilic aluminium
e.Tubeoutsidedia.andtype mm7, innergroove tube 7,innergroove tube
f.Coillengthxheightxwidth mm580x252x26.74 665x315x26.74
g.Numberofcircuits 2 3
Indoorairflow(Hi/Mi/Lo)m3/h550/450/320 700/570/460
Indoornoiselevel(Hi/Mi/Lo)dB(A)41/37/29 43/39/32
IndoorunitDimension(W*D*H)mm750x198x280 835x198x280

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Packing(W*D*H)mm830x270x355 910x270x355
Net/Grossweight Kg8 / 10 9 / 11
Outdoorfan
motor
Model  YDK24-6F(B) YDK36-6
Brand  Welling Welling
Input W63 70
Capacitor uF 2.5 2.5
Speed r/min800 / -- / -- 900 / -- / --
Outdoorcoil
a.Numberofrows 2 2
b.Tubepitch(a)xrowpitch(b) mm19.5x11.6 21x13.37
c.Finspacing mm1.2 1.5
d.Fintype(code) Hydrophilic aluminium Hydrophilic aluminium
e.Tubeoutsidedia.andtype mm5,innergroove tube 7,innergroove tube
f.Coillengthxheightxwidth mm750x507x23.2 754x504x26.74
g.Numberofcircuits 6 4
Outdoorairflow m3/h1800 1900
Outdoornoiselevel dB(A)54 55
Outdoorunit
Dimension(W*D*H)mm780x250x540 780x250x540
Packing(W*D*H)mm910x335x585 910x335x585
Net/Grossweight Kg27 / 29.5 30 / 32
RefrigeranttypegR410A/810g R410A/1250g
Designpressure MPa4.2/1.5 4.2/1.5
Refrigerantpiping
Liquidside/Gasside mm(inch) 6.35/9.52(1/4"/3/8") 6.35/12.7(1/4"/1/2")
Max.refrigerantpipelength m20 20
Max.differenceinlevel m8 8
Connectionwiring  1.0(Optional) 1.5(Optional)
Plugtype 1.0 / VDE 1.5 / VDE
Thermostattype Remote Control Remote Control
Operationtemp ℃ 17-30 17-30
Ambienttemp(cooling/heating)℃18-43/-7-24 18-43/-7-24
Applicationarea m213-22 18-29

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IndoorMS11M-18HRN1 MS11M-24HRN1
OutdoorMO11M-18HN1 MO11M-24HN1
PowersupplyPh‐V‐Hz220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph
Cooling
Capacity Btu/h18000 24000
kW5,28 7,03
Input W1643 2350
Ratedcurrent A7.5 11.0
EER W/W3.21 3.00
Heating
Capacity Btu/h18500 25000
kW5,42 7,33
Input W1502 2100
Ratedcurrent A7.2 10.7
COP W/W3.61 3.49
MoistureRemoval L/h1.8 2.6
Max.inputconsumption W2200 4000
Max.current A12.0 20.0
Startingcurrent A31.8 60
Compressor
Model  PA200M2CS-4KU2 PA270G2CS-4MU1
Type  ROTARY ROTARY
Brand  GMCC GMCC
Capacity Btu/h16581 23287/23458
Input W1605 2235/2385
Ratedcurrent(RLA) A7.45 10.55/11.15
LockedrotorAmp(LRA) A31.8 60
Thermalprotector  ---- ---
Thermalprotectorposition INTERNAL INTERNAL
Capacitor uF45 60
Refrigerantoil/oilcharge mlESTER OIL VG74 750cc ESTER OIL VG74/850 CC
Indoorfanmotor
Model  RPG45C RPG50C
Brand  Broad Ocean Broad Ocean
Input W72 91
Capacitor uF 3.0 3.5
Speed(Hi/Mi/Lo)r/min1250/900/700 1200/1100/1000
Indoorcoil
a.Numberofrows 2 2
b.Tubepitch(a)xrowpitch(b) mm21x13.37 21x13.37
c.Finspacing mm1.3 1.2
d.Fintype(code) Hydrophilic aluminium Hydrophilic aluminium
e.Tubeoutsidedia.andtype mm7,innergroove tube 7,innergroove tube
f.Coillengthxheightxwidth mm760x315x26.74 904x399x26.74
g.Numberofcircuits 5 6
Indoorairflow(Hi/Mi/Lo)m3/h1150/830/650 1400/1250/1150
Indoornoiselevel(Hi/Mi/Lo)dB(A)49/40/33 49/47/40
IndoorunitDimension(W*D*H)mm990x218x315 1186x258x340
Packing(W*D*H)mm1065x300x400 1265x420x340

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Net/Grossweight Kg12.5 / 15.5 16 / 20
Outdoorfan
motor
Model  YDK55-6H YDK100-6D(B)
Brand  Welling Welling
Input W106 177
Capacitor uF 3.0 5.0
Speed r/min865 / -- / -- 875 / -- / --
Outdoorcoil
a.Numberofrows 2 2
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7,innergroove tube 7,innergroove tube
f.Coillengthxheightxwidth mm785x651x26.74 785x651x26.74
g.Numberofcircuits 4 4
Outdoorairflow m3/h2500 2700
Outdoornoiselevel dB(A)57 60
Outdoorunit
Dimension(W*D*H)mm845x320x700 845x320x700
Packing(W*D*H)mm965x395x755 965x395x755
Net/Grossweight Kg42 / 45 50/53
RefrigeranttypegR410A/1370g R410A/1780g
Designpressure MPa4.2/1.5 4.2/1.5
Refrigerantpiping
Liquidside/Gasside mm(inch) 6.35/12.7(1/4"/1/2") 9.52/16(3/8"/5/8")
Max.refrigerantpipelength m25 25
Max.differenceinlevel m10 10
Connectionwiring  1.5(Optional) 1.0(Optional)
Plugtype 1.5 / --- --
Thermostattype Remote Control Remote Control
Operationtemp ℃ 17-30 17-30
Ambienttemp(cooling/heating)℃18-43/-7-24 18-43/-7-24
Applicationarea m226-44 35-58

Oasis On-off DM12-01.01.09en
12 Service manual
4. Dimension
4.1 Indoor Unit
Model W D H
MS11M-09HRN1 750 198 280
MS11M-12HRN1 835 198 280
MS11M-18HRN1 990 218 315
MS11M-24HRN1 1186 258 340

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Service manual 13
Model L(mm) R(mm) H(mm) Dimension of installation hole(mm)
MS11M-09HRN1 180 110 45 ￠65
MS11M-12HRN1 140 110 45
Model L(mm) R(mm) H(mm) Dimension of installation hole(mm)
MS11M-18HRN1 260 134.6 45 ￠65
Model L(mm) R(mm) H(mm) Dimension of installation hole(mm)
MS11M-24HRN1 275 275 45 ￠65

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4.2 Outdoor Unit
More than 30cm
More than 60cm
More than 70cm
More than 30cm
More than 60cm
(Service space
︶
Fenceor
obstacles
Model W D H W1 A B
MO11M-09HN1
780 250 540 843 549 276
MO11M-12HN1
MO11M-18HN1
845 320 700 908 560 335
MO11M-24HN1

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Service manual 15
5. Capacity tables
MS11M-09HRN1 / MO11M-09HN1
Cooling
Cooling Outdoor conditions (DB)
Indoor Conditions (kW) 18ºC 21ºC 28ºC 35ºC 43ºC
21/15ºC DB/WB
TC 2.85 2.72 2.59 2.46 2.35
SC 2.05 2.01 1.99 1.96 1.97
Input 2.58 2.67 2.90 3.03 3.12
TC 2.90 2.80 2.67 2.53 2.38
24/17ºC DB/WB SC 2.12 2.10 2.08 2.05 2.00
Input 2.61 2.83 3.03 3.16 3.32
TC 2.96 2.85 2.72 2.64 2.46
27/19ºC DB/WB SC 2.13 2.11 2.09 2.06 2.01
Input 2.70 2.90 3.06 3.22 3.38
TC 3.01 2.90 2.80 2.75 2.53
32/23ºC DB/WB SC 2.50 2.47 2.43 2.42 2.36
Input 2.90 3.03 3.16 3.38 3.51
Heating
Heating Outdoor conditions
Indoor Conditions
(DB) (kW)
24/18ºC
DB/WB
7/6ºC
DB/WB
2/1ºC
DB/WB
-5/-6ºC
DB/WB
-7/-8ºC
DB/WB
15ºC TC 3.61 2.92 2.39 2.17 2.03
Input 3.91 3.37 2.90 2.72 2.57
20ºC TC 3.50
2.78 2.25 2.11 1.95
Input 4.27
3.62 3.19 2.93 2.75
27ºC TC 3.28 2.61 2.11 2.06 1.83
Input 4.53 3.91 3.44 3.19 2.97
Remark:
TC: Total capacity; kW
SC: Sensible heat capacity; kW
Input: Input power; kW

Oasis On-off DM12-01.01.09en
16 Service manual
MS11M-12HRN1 / MO11M-12HN1
Cooling
Cooling Outdoor conditions (DB)
Indoor Conditions (kW) 18ºC 21ºC 28ºC 35ºC 43ºC
21/15ºC DB/WB
TC 3.80 3.63 3.45 3.27 3.13
SC 2.74 2.68 2.66 2.62 2.63
Input 2.58 2.68 2.91 3.04 3.13
TC 3.87 3.73 3.56 3.38 3.17
24/17ºC DB/WB SC 2.83 2.80 2.77 2.74 2.66
Input 2.62 2.84 3.04 3.17 3.33
TC 3.94 3.80 3.63 3.52 3.27
27/19ºC DB/WB SC 2.84 2.81 2.79 2.75 2.68
Input 2.71 2.91 3.07 3.23 3.39
TC 4.01 3.87 3.73 3.66 3.38
32/23ºC DB/WB SC 3.33 3.29 3.25 3.22 3.14
Input 2.91 3.04 3.17 3.39 3.52
Heating
Heating Outdoor conditions
Indoor Conditions
(DB) (kW)
24/18ºC
DB/WB
7/6ºC
DB/WB
2/1ºC
DB/WB
-5/-6ºC
DB/WB
-7/-8ºC
DB/WB
15ºC TC 4.76 3.84 3.15 2.85 2.67
Input 3.91 3.37 2.90 2.72 2.57
20ºC TC 4.61
3.66 2.96 2.78 2.56
Input 4.27
3.62 3.19 2.93 2.75
27ºC TC 4.32 3.44 2.78 2.71 2.42
Input 4.53 3.91 3.44 3.19 2.97
Remark:
TC: Total capacity; kW
SC: Sensible heat capacity; kW
Input: Input power; kW

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Service manual 17
MS11M-18HRN1 / MO11M-18HN1
Cooling
Cooling Outdoor conditions (DB)
Indoor Conditions (kW) 18ºC 21ºC 28ºC 35ºC 43ºC
21/15ºC DB/WB
TC 5.70 5.44 5.17 4.91 4.70
SC 4.11 4.02 3.98 3.93 3.95
Input 2.57 2.66 2.89 3.02 3.11
TC 5.81 5.60 5.33 5.07 4.75
24/17ºC DB/WB SC 4.24 4.20 4.16 4.11 3.99
Input 2.60 2.82 3.02 3.15 3.31
TC 5.91 5.70 5.44 5.28 4.91
27/19ºC DB/WB SC 4.26 4.22 4.19 4.12 4.03
Input 2.70 2.89 3.05 3.21 3.37
TC 6.02 5.81 5.60 5.49 5.07
32/23ºC DB/WB SC 5.00 4.94 4.87 4.83 4.71
Input 2.89 3.02 3.15 3.37 3.50
Heating
Heating Outdoor conditions
Indoor Conditions
(DB) (kW)
24/18ºC
DB/WB
7/6ºC
DB/WB
2/1ºC
DB/WB
-5/-6ºC
DB/WB
-7/-8ºC
DB/WB
15ºC TC 7.05 5.69 4.66 4.23 3.96
Input 3.90 3.36 2.89 2.71 2.56
20ºC TC 6.83
5.42 4.39 4.12 3.79
Input 4.26
3.61 3.18 2.92 2.74
27ºC TC 6.40 5.09 4.12 4.01 3.58
Input 4.51 3.90 3.43 3.18 2.96
Remark:
TC: Total capacity; kW
SC: Sensible heat capacity; kW
Input: Input power; kW

Oasis On-off DM12-01.01.09en
18 Service manual
MS11M-24HRN1 / MO11M-24HN1
Cooling
Cooling Outdoor conditions (DB)
Indoor Conditions (kW) 18ºC 21ºC 28ºC 35ºC 43ºC
TC 7.59 7.24 6.89 6.54 6.26
21/15ºC DB/WB SC 5.47 5.36 5.30 5.23 5.26
Input 2.40 2.49 2.70 2.82 2.91
TC 7.73 7.45 7.10 6.75 6.33
24/17ºC DB/WB SC 5.65 5.59 5.54 5.47 5.31
Input 2.43 2.64 2.82 2.94 3.09
TC 7.87 7.59 7.24 7.03 6.54
27/19ºC DB/WB SC 5.67 5.62 5.58 5.48 5.36
Input 2.52 2.70 2.85 3.00 3.15
TC 8.01 7.73 7.45 7.31 6.75
32/23ºC DB/WB SC 6.65 6.57 6.48 6.43 6.28
Input 2.70 2.82 2.94 3.15 3.27
Heating
Heating Outdoor conditions
Indoor Conditions
(DB) (kW)
24/18ºC
DB/WB
7/6ºC
DB/WB
2/1ºC
DB/WB
-5/-6ºC
DB/WB
-7/-8ºC
DB/WB
15ºC TC 9.53 7.70 6.30 5.72 5.35
Input 3.77 3.25 2.79 2.62 2.48
20ºC TC 9.24
7.33 5.94 5.57 5.13
Input 4.12
3.49 3.07 2.83 2.65
27ºC TC 8.65 6.89 5.57 5.42 4.84
Input 4.36 3.77 3.32 3.07 2.86
Remark:
TC: Total capacity; kW
SC: Sensible heat capacity; kW
Input: Input power; kW

DM12-01.01.09en Oasis On-off
Service manual 19
6. Refrigerant Cycle Diagram
INDOO
R
OUTDOO
R
LIQUID SIDE
GAS SIDE
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
2-WAY VALVE
3-WAY VALVE
CHECK VALVE
(Heating Model only)
CAPILIARY TUBE
REVERSING VALVE
(Heating Model only)
COOLING
HEATING
ACCUMULATOR

Oasis On-off DM12-01.01.09en
20 Service manual
7. Wiring Diagram
7.1 Indoor Unit
MS11M-09HRN1, MS11M-12HRN1
MS11M-18HRN1