Midea Mono 3D User manual

Revision A: 1312030001, Content updated.
Model Numbers:
MS11M-09HRFN1-MW0W MS11M-12HRFN1-MV0W MS11M-18HRFN1-MU0W
MS11M-24HRDN1-MT0W
Oasis MONO Split 3D DC Inverter
Air Conditioner
SERVICE MANUAL Mono 3D
Table of Contents
1. Precaution
2. Part Names And Functions
3. Dimension
4. Refrigerant Cycle Diagram
5. Wiring Diagram
6. Installation Details
7. Operation Characteristics
8. Electronic Function
9. Troubleshooting
10. Exploded View
11. Disassembly Instructions
WARNING
Installation MUST conform with local building codes or, in the absence of local codes, with the
National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.
The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments
Installation or repairs made by unqualified persons can result in hazards to you and others.
Failure to carefully read and follow all instructions in this manual can result in equipment
malfunction, property damage, personal injury and/or death.
This service is only for service engineer to use.

CONTENTS
1. Precaution .....................................................................................................................................................1
1.1 Safety Precaution.......................................................................................................................... 1
1.2 Warning......................................................................................................................................... 1
2. Part Names And Functions..........................................................................................................................4
2.1 Model Names of Indoor/Outdoor units.......................................................................................... 4
2.2 Part names of Indoor/Outdoor units ............................................................................................. 4
2.3 Functions of Indoor/Outdoor units ................................................................................................ 5
3. Dimension .....................................................................................................................................................8
3.1 Indoor Unit..................................................................................................................................... 8
3.2 Outdoor Unit................................................................................................................................ 10
4. Refrigerant Cycle Diagram ........................................................................................................................11
5. Wiring Diagram ...........................................................................................................................................12
5.1 Indoor Unit................................................................................................................................... 12
5.2 Outdoor Unit................................................................................................................................ 14
6 Installation Details.......................................................................................................................................19
6.1 Wrench torque sheet for installation........................................................................................... 19
6.2 Connecting the cables................................................................................................................ 19
6.3 Pipe length and the elevation ..................................................................................................... 19
6.4 Installation for the first time......................................................................................................... 20
6.5 Adding the refrigerant after running the system for many years................................................ 21
6.6 Re-installation while the indoor unit need to be repaired........................................................... 21
6.7 Re-installation while the outdoor unit need to be repaired......................................................... 22
7. Operation Characteristics..........................................................................................................................24
8. Electronic Function....................................................................................................................................25
8.1 Abbreviation ................................................................................................................................ 25
8.2 Display function........................................................................................................................... 25
8.3 Main Protection........................................................................................................................... 26
8.4 Operation Modes and Functions................................................................................................. 28
9. Troubleshooting..........................................................................................................................................36
9.1 Indoor Unit Error Display ............................................................................................................ 37
9.2 Outdoor unit error display........................................................................................................... 38
9.3 Diagnosis and Solution............................................................................................................... 41
10. Exploded View ..........................................................................................................................................65
10.1 Indoor unit................................................................................................................................. 65
10.2 Outdoor unit.............................................................................................................................. 73
11 Disassembly Instructions.........................................................................................................................81
11.1 Indoor unit ................................................................................................................................. 81
11.2 Outdoor unit............................................................................................................................... 85

1
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
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.

2
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.

3
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.

4
2. Part Names And Functions
2.1 Model Names of Indoor/Outdoor units
Series
Capacity
Indoor units
Outdoor units
Inverter
9k
MS11M-09HRFN1-MW0W
MOC-09HFN1-MW0W
12k
MS11M-12HRFN1-MV0W
MOC-12HFN1-MV0W
18k
MS11M-18HRFN1-MU0W
MOF-18HFN1-MU0W
24k
MS11M-24HRDN1-MT0W
MOG-24HFN1-MT0W
2.2 Part names of Indoor/Outdoor units

5
2.3 Functions of Indoor/Outdoor units
Cold catalyst filter
Plasma(O)
Silver Ico Filter(O)
Vitamin C Filter(O)
3M HAM Filter(O)
Bio Filter(O)
Golden Fin(O)
Ionizer(O)
Compressor Crankcase Heater
Self Clean(O)
1W Standby
Louver Position Memory Function
Refrigerant Leakage Detect
Self-diag. Function
Hydrophilic Aluminum Fin
Anti-rust Cabinet
Valve Protection Cover
PTC Heating Belt(O)
Horizontal &Vertical Swing Function(O)
Filter
Follow Me(O)
Silent mode(O)
O: optional function

6
Cold Catalyst Filter:
Eliminate formaldehyde and other volatile organic compounds as well as harmful gases and odors.
Ionizer:
Release negative ions, eliminate odor, dust, smoke and pollen particles to give you fresh and healthy air.
Plasma:
Generate a high voltage electrostatic zone, absorb and eliminate dust, smoke and pollen particles. It also
deodorizes air as removing tobacco odours, garbage smells etc.
Silver Ion Filter:
Sterilize bacteria effectively by decomposing cell wall of bacteria.
Vitamin C Filter:
Release Vitamin C which can eliminate active oxygen to beautify the skin.
3M HAM Filter:
Open-hole-structure with charged electrostatic effectively capture dust and particles, ensure maximum air
flow and minimum pressure drop.
Bio Filter(O):
Bio filter consists of a specialized biological enzyme and Eco filter. The Eco filter catches very small
airborne dust particles and bacteria, fungi and microbes. Biological enzyme kills bacteria by dissolving their
cell wall thus eliminating the problem of re-pollution.
Golden Fin:
The Golden hydrophilic condenser can improve the heating efficiency by accelerating the defrosting
process. The unique anticorrosive golden coating on the condenser can withstand the salty air, rain and
other corrosive elements.
Self Clean:
When this function is activated, firstly the indoor unit operates as Fan-only mode with low fan speed, during
this period the condensed water will take some dust on evaporator fins away. After that the unit turns to
heating operation with low fan speed which dries the inside of indoor unit. Finally it turns to fan-only mode
and blows away the wet air. The whole process cleans the internal side of indoor unit and prevents the
breeding of bacteria.
Follow me:
With this technology, a temperature sensor is built in the remote control when you stay close to the remote
control, the unit will automatically change the operation mode to supply comfortable temperature just like
the air conditioner is following you.
Silent mode
Indoor fan will run at super breeze speed and indoor unit noise level can be extremly low to 20dB(A) when
the unit enters silent mode operation.
Horizontal&Vertical Swing Function
The unit has auto horizontal swing and auto vertical swing function, which supplies more even and
comfortable air flow.
Louver position memory function:
When starting the unit again after shutting down, its louver will restore to the angle originally set by the user
Refrigerant leakage detect:
The refrigerant leakage detect function can better prevent the compressor being damaged by refrigerant
leakage or compressor overload.
Self-diag.Function:
Monitoring some abnormal operations or parts failures, microcomputer of the air conditioner will switch off
and protect the system automatically.Meanwhile, the error or protection code will be displayed on the indoor

7
unit.
PTC heating belt:
With a PTC heating belt fitted on the base plate of the outdoor unit, the rain, snow or defrosted water
accumulating on the base plate is avoided.
Compressor crankcase heater:
The oil dissolves easily in refrigerant, especially in low temperature condition. The crankcase heating belt
can heat the bottom of the compressor to avoid pumping out too much oil with the refrigerant, which helps
to protect the compressor.

8
3. Dimension
3.1 Indoor Unit
W D
Model
L
R
H
Dimension of installation hole
MS11M-09HRFN1-MW0W
140mm
(5.5in)
110mm
(4.3in)
45mm
(1.8in)
Φ65mm(2.56in)
MS11M-12HRFN1-MV0W
Model
W
D
H
MS11M-09HRFN1-MW0W
835mm
(32.9in)
198mm
(7.8in)
280mm
(11.0in)
MS11M-12HRFN1-MV0W
MS11M-18HRFN1-MU0W
990mm
(39.0in)
218mm
(8.6in)
315mm
(12.4in)
MS11M-24HRDN1-MT0W
1186mm
(46.7in)
258mm
(10.2in)
340mm
(13.4in)

9
Model
L
R
H
Dimension of installation hole
MS11M-18HRFN1-MU0W
260mm
(10.2in)
135mm
(5.3in)
45mm
(1.8in)
Φ65mm(2.56in)
Model
L
R
H
Dimension of installation hole
MS11M-24HRDN1-MT0W
275mm
(10.8in)
275mm
(10.8in)
45mm
(1.8in)
Φ65mm(2.56in)

10
3.2 Outdoor Unit
More than 60cm(23.6in)
More than 70cm(27.6in)
More than 30cm(11.8in)
More than 60cm(23.6in)
(Service space)
Fence or
obstacles
More than 30cm(11.8in)
Note: The above drawing is only for reference. The appearance of your units may be different.
Model
W
D
H
W1
A
B
MOC-09HFN1-MW0W
760mm
(29.9in)
285mm
(11.2in)
590mm
(23.2in)
823mm
(32.4in)
530mm
(20.9in)
290mm
(11.4in)
MOC-12HFN1-MV0W
MOF-18HFN1-MU0W
845mm
(33.3in)
320mm
(12.6in)
700mm
(27.6in)
908mm
(35.7in)
560mm
(22.0in)
335mm
(13.2in)
MOG-24HFN1-MT0W
900mm
(36.7in)
315mm
(12.9in)
860mm
(35.1in)
980mm
(40in)
590mm
(24.1in)
333mm
(13.6in)

11
4. Refrigerant Cycle Diagram
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
T3 Condenser
temp. sensor
T5 Discharge
temp. sensor
T4 Ambient
temp. sensor
INDOOR OUTDOOR
Electronic
expansion valve
CAPILIARY TUBE
Accumulator
CAPILIARY TUBE

12
5. Wiring Diagram
5.1 Indoor Unit
MS11M-09HRFN1-MW0W, MS11M-12HRFN1-MV0W, MS11M-18HRFN1-MU0W

13
MS11M-24HRDN1-MT0W

14
5.2 Outdoor Unit
MOC-09HFN1-MW0W, MOC-12HFN1-MV0W

15
MOF-18HFN1-MU0W

16
MOG-24HFN1-MT0W
MOC-09HFN1-MW0W, MOC-12HFN1-MV0W

17
MOF-18HFN1-MU0W

18
MOG-24HFN1-MT0W