Midea MO11MU-09HRDN1 User manual

Service manual 1
OASIS Inverter SERIES
Service Manual 2012
MS11MU-09HRDN1 / MO11MU-09HRDN1
MS11MU-12HRDN1 / MO11MU-12HRDN1
MS11MU-18HRDN1 / MO11MU-18HRDN1
MS11MU-24HRDN1 / MO11MU-24HRDN1
DM12-01.01.10en

Oasis Inverter DM12-01.01.10en
2 Service manual
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..............................................................................................................................21
8 Installation Details...................................................................................................................................... 23
8.1 Wrench torque sheet for installation ..........................................................................................23
8.2 Connecting the cables...............................................................................................................23
8.3 Pipe length and the elevation ....................................................................................................24
8.4 Installation for the first time .......................................................................................................25
8.5 Adding the refrigerant after running the system for many years ................................................28
8.6 Re-installation while the indoor unit need to be repaired...........................................................29
8.7 Re-installation while the outdoor unit need to be repaired.........................................................31
9. Operation Characteristics......................................................................................................................... 34
10. Electronic function.................................................................................................................................. 35
10.1 Abbreviation ............................................................................................................................35
10.2 Display function .......................................................................................................................35
10.3 Main Protection .......................................................................................................................36
10.4 Operation Modes and Functions .............................................................................................38
11. Troubleshooting....................................................................................................................................... 52
11.1 Indoor Unit Error Display .........................................................................................................52
11.2 Diagnosis and Solution............................................................................................................53

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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
DC
Inverter
Capacity Indoor units Outdoor units
9k MS11MU-09HRDN1 MO11MU-09HRDN1
12k MS11MU-12HRDN1 MO11MU-12HRDN1
18k MS11MU-18HRDN1 MO11MU-18HRDN1
21k MS11MU-24HRDN1 MO11MU-24HRDN1
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
Split and Multi Application
Outdoor unit
1W Standby
Refrigerant Leakage Detect
Self-diagnostic Function
Hydrophilic Aluminum Fin
Anti-Rust Cabinet
Valve Protection Cover
Temperature compensation

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3. Specification
IndoorMS11MU-09HRDN1 MS11MU-12HRDN1
OutdoorMO11MU-09HRDN1 MO11MU-12HRDN1
PowersupplyPh‐V‐Hz220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph
Cooling
Capacity Btu/h9000(2050~11800) 12000(4000~14200)
kW2,64 (0,60 - 3,46) 3,52 (1,17 - 4,16)
Input W820(230~1120) 1090(350~1220)
Ratedcurrent A3.8(1.0~4.7) 4.8(1.5~5.0)
EER W/W3.22 3.23
Heating
Capacity Btu/h10000(3200~13800) 13000(4100~15100)
kW2,93 (0,94 - 4,04) 3,81 (1,20 - 4,43)
Input W810(230~1010) 1050(350~1150)
Ratedcurrent A3.7(1.0~4.2) 4.6(1.5~4.8)
COP W/W3.62 3.63
MoistureRemoval L/h1.0 1.2
Max.inputconsumption W1850 1850
Max.current A8.5 8.5
Startingcurrent A---- ----
Compressor
Model  DA108X1C-23EZ DA108X1C-23EZ
Type  ROTARY ROTARY
Brand  TOSHIBA TOSHIBA
Capacity Btu/h11021 11021
Input W855 855
Ratedcurrent(RLA) A4.95 4.95
LockedrotorAmp(LRA) A---- ----
Thermalprotector  ---- ----
Thermalprotector
position
 ---- ----
Capacitor uF6.0 6.0
Refrigerantoil/oil
charge mlESTER OIL VG74 480ml ESTER OIL VG74 480ml
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mm580x252x26.74 655x315x26.74

DM12-01.01.10en Oasis Inverter
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width
g.Numberofcircuits 2 4
Indoorairflow(Hi/Mi/Lo)m3/h600/500/350 700/570/460
Indoornoiselevel(Hi/Mi/Lo)dB(A)40/36/27 42/37/31
Indoorunit
Dimension(W*D*H)mm750x280x198 835x280x198
Packing(W*D*H)mm830x270x355 910x270x355
Net/Grossweight Kg8 / 10 9 / 11
Outdoorfan
motor
Model  YDK24-6P(B) YDK24-6P(B)
Brand  Welling Welling
Input W60/50 60/50
Capacitor uF 2.5 2.5
Speed r/min860 / -- / 660 860 / -- / 660
Outdoorcoil
a.Numberofrows 1.6 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720x504x13.37+419x504x13.3
7 720x504x26.74
g.Numberofcircuits 4 2
Outdoorairflow m3/h1600 1600
Outdoornoiselevel dB(A)54 55
Outdoorunit
Dimension(W*D*H)mm670x265x540 670x265x540
Packing(W*D*H)mm770x325x570 770x325x570
Net/Grossweight Kg27 / 29 29 / 31
RefrigeranttypegR410A/870g R410A/980g
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/9.52(1/4"/3/8")
Max.refrigerantpipe
length m20 20
Max.differenceinlevel m8 8
Connectionwiring  1.5(Optional) 1.5(Optional)
Plugtype -- --
Thermostattype Remote Control Remote Control
Operationtemp ℃ 17-30 17-30
Ambienttemp(cooling/heating)℃0-50/-15-34 0-50/-15-34
Applicationarea m213-22 18-29

Oasis Inverter DM12-01.01.10en
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IndoorMS11MU-18HRDN1 MS11MU-24HRDN1
OutdoorMO11MU-18HRDN1 MO11MU-24HRDN1
PowersupplyPh‐V‐Hz220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph
Cooling
Capacity Btu/h18000(5000~19000) 24000(12000~26000)
kW5,28 (1,47 - 5,57) 7,03 (3,52 - 7,62)
Input W1545(600~1750) 2190(800~2700)
Ratedcurrent A6.8(1.7~7.6) 9.5(3.5~11.7)
EER W/W3.41 3.21
Heating
Capacity Btu/h19000(5000~20000) 25000(12000~27000)
kW5,57 (1,47 - 5,86) 7,33 (3,52 - 7,91)
Input W1510(600~1700) 2030(800~2750)
Ratedcurrent A6.7(1.5~7.4) 8.8(3.5~12.0)
COP W/W3.69 3.61
MoistureRemoval L/h1.8 2.6
Max.inputconsumption W2640 3050
Max.current A11.9 14.0
Startingcurrent A---- ----
Compressor
Model  DA130S1C-20FZ DA150S1C-20FZ
Type  ROTARY ROTARY
Brand  GMCC GMCC
Capacity Btu/h13170 15286
Input W990 1150
Ratedcurrent(RLA) A4.97 9.7
LockedrotorAmp(LRA) A---- ----
Thermalprotector  1NT01L-4639 or KSD301 KSD301
Thermalprotector
position
 ---- EXTERNAL
Capacitor uF45 50
Refrigerantoil/oilcharge mlESTER OIL VG74/500 ESTER OIL VG74/500
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1200 / 900 / 700 1250 / 1100 / 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760x315x26.74 904x399x26.74
g.Numberofcircuits 5 5
Indoorairflow(Hi/Mi/Lo)m3/h1150/860/670 1550/1350/1000