Midea NEOLA ON-OFF User manual

NEOLA ON-OFF SERIES
Service Manual 2012
11DSEU-B-1202

CONTENTS
1. Precaution .................................................................................................................................................... 1
1.1 Safety Precaution..........................................................................................................................1
1.2 Warning.........................................................................................................................................1
2. Function........................................................................................................................................................ 6
3. Dimension .................................................................................................................................................... 8
3.1 Indoor Units...................................................................................................................................8
3.2 Outdoor Units..............................................................................................................................10
4. Refrigerant Cycle Diagram ........................................................................................................................11
5. Wiring Diagram .......................................................................................................................................... 12
5.1 Indoor Units.................................................................................................................................12
5.2 Outdoor Units..............................................................................................................................14
6. Installation details...................................................................................................................................... 16
6.1 Wrench torque sheet for installation........................................................................................... 16
6.2 Connecting the cables................................................................................................................16
6.3 Pipe length and the elevation .....................................................................................................17
6.4 Installation for the first time.........................................................................................................18
6.5Adding the refrigerant after running the system for many years ................................................ 21
6.6 Re-installation while the indoor unit need to be repaired ........................................................... 22
6.7 Re-installation while the outdoor unit need to be repaired......................................................... 24
7. Operation characteristics ......................................................................................................................... 27
8. Electronic function.................................................................................................................................... 28
8.1 Abbreviation ................................................................................................................................28
8.2 Display function...........................................................................................................................28
8.3 Main Protection...........................................................................................................................29
8.4 Operation Modes and Functions.................................................................................................29
9. Troubleshooting......................................................................................................................................... 38
9.1 Indoor unit error display..............................................................................................................38
9.2 Diagnosis and Solution...............................................................................................................39

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 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

2
condenser and evaporator.
For installation, always contact the dealer or an Authorized service center.
There is risk of fire, electric shock, explosion, or injury.
Do not install the product on a defective installation stand.
It may cause injury, accident, or damage to the product.
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.
Moisture may condense and wet or damage furniture.
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.
There is risk of fire or electric shock.
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 electric 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.
Do not use the telephone or turn switches on or off.

3
There is risk of explosion or fire.
If strange sounds, or small 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 (flooded or submerged), 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.

4
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.
Avoid personal injury.
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 periods of time. (Do not sit in the
draft).
This could harm to your health.
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.
It may cause product failure.
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.
There is risk of personal injury.
Do not step on or put anything on the product. (outdoor units)
There is risk of personal injury and failure of product.
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 object through air inlet or outlet while the product is

5
operated.
There are sharp and moving parts that could cause personal injury.
Do not drink the water drained from the product.
It is not sanitary could cause serious health issues.
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 mew 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.
The chemical in batteries could cause burns or other health hazards
The designs, and information in this book are subject to change without notice for product improvement.

6
2. Function
Model Names of Indoor/Outdoor Units
Series Capacity Indoor units Outdoor units
On-Off
7k
MS11D-07HRN1-QB6 MOK-07HN1-QB6
MS11D-07HRN1-QC2(2T0032100248) MOK3-07HN1-QC2
MS11D-07HRN1-QC2(2T0032100252) MOK3-07HN1-QC2
9k
MS11D-09HRN1-QB6 MOK-09HN1-QB6
MS11D-09HRN1-QC2(2T0032300727) MOA2-09HN1-QC2
MS11D-09HRN1-QC2(2T0032300764) MOA2-09HN1-QC2
12k
MS11D-12HRN1-QB6 MOA2-12HN1-QB6
MS11D-12HRN1-QC2(2T0032400199) MOB4-12HN1-QC2
MS11D-12HRN1-QC2(2T0032400212) MOB-11HN1-QC2
18k MS11D-18HRN1-QB6 MOB-18HN1-QB6
MS11D-18HRN1-QB8 MOC-18HN1-QB8
21k MS11D-21HRN1-QB6W MOC-21HN1-QB6W
MS11D-21HRN1-QB8W MOP-21HN1-QB8W
24k MS11D-24HRN1-QB6W MOP-24HN1-QB6W
MS11D-24HRN1-QB8W MOF2-24HN1-QB8W

7
Filter
Ionizer(O)
Plasma(O)
Silver Ico Filter(O)
Vitamin C Filter(O)
3M HAM Filter(O)
Bio Filter(O)
Killer Of Formaldehyde
Compressor Crankcase Heater(O)
Golden Fin(O)
Self Clean(O)
Louver Position Memory Function
Refrigerant Leakage Detect
Self-diag. Function
H
ydrophilic Aluminum Fin
Anti-rust Cabinet
Valve Protection Cover
PTC Heating Belt(O)
Follow Me(O)
0.5W Standby (O)
O: optional function

8
3. Dimension
3.1 Indoor Units
DW
H
Model W D H
MS11D-07HRN1-QB6 680 178 255
MS11D-07HRN1-QC2
MS11D-09HRN1-QB6 680 178 255
MS11D-09HRN1-QC2(2T0032300727)
MS11D-12HRN1-QB6
770 188 255
MS11D-12HRN1-QC2
MS11D-09HRN1-QC2(2T0032300764)
MS11D-18HRN1-QB6 905 198 275
MS11D-18HRN1-QB8
MS11D-21HRN1-QB6W 1030 218 315
MS11D-21HRN1-QB8W
MS11D-24HRN1-QB6W 1030 218 315
MS11D-24HRN1-QB8W

9
LR
H
Model R(mm) L(mm) H(mm)
Dimension of installation
hole(mm)
MS11D-07HRN1-QB6
92 170 45
￠65
MS11D-07HRN1-QC2
MS11D-09HRN1-QB6
MS11D-09HRN1-QC2(2T0032300727)
MS11D-12HRN1-QB6 95 170 45
MS11D-12HRN1-QC2
MS11D-09HRN1-QC2(2T0032300764)
MS11D-18HRN1-QB6 80 100 45
MS11D-18HRN1-QB8
Model R(mm) L(mm) H(mm) Dimension of installation hole(mm)
MS11D-21HRN1-QB6W
163 293 45 ￠65
MS11D-21HRN1-QB8W
MS11D-24HRN1-QB6W
MS11D-24HRN1-QB8W
H
L R

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3.2 Outdoor Units
More than 30cm
More than 60cm
More than 70cm
More than 30cm
More than 60cm
(Service space)
Fence or
obstacles
Model W H D W1 A B
MOK-07HN1-QB6 685 260 430 742 460 276
MOK3-07HN1-QC2
MOK-09HN1-QB6
MOA2-09HN1-QC2 700 240 540 757 458 250
MOA2-12HN1-QB6
MOB-11HN1-QC2 780 250 540 843 549 276
MOB4-12HN1-QC2 780 250 540 843 549 276
MOB-18HN1-QB6
MOC-18HN1-QB8 760 285 590 823 530 290
MOC-21HN1-QB6W
MOP-21HN1-QB8W 820 330 595 870 523 340
MOP-24HN1-QB6W
MOF2-24HN1-QB8W 845 320 700 908 560 335

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4. Refrigerant Cycle Diagram
INDOOR OUTDOOR
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

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5. Wiring Diagram
5.1 Indoor Units
MS11D-07HRN1-QB6, MS11D-07HRN1-QC2, MS11D-09HRN1-QB6, MS11D-09HRN1-QC2,
MS11D-12HRN1-QB6, MS11D-12HRN1-QC2, MS11D-18HRN1-QB6, MS11D-18HRN1-QB8

13
MS11D-21HRN1-QB6W, MS11D-21HRN1-QB8, MS11D-24HRN1-QB6W, MS11D-24HRN1-QB8W

14
5.2 Outdoor Units
MOK-07HN1-QB6, MOK3-07HN1-QC2,MOK-09HN1-QB6, MOA2-09HN1-QC2, MOA2-12HN1-QB6,
MOB4-12HN1-QC2, MOB-18HN1-QB6,MOB-11HN1-QC2
MOC-18HN1-QB8

15
MOC-21HN1-QB6W,MOP-21HN1-QB8W, MOP-24HN1-QB6W, MOF2-24HN1-QB8W

16
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)
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 1.0
>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.

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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
MS11D-07HRN1-QC2+MOK3-07HN1-QC2
3/8’’
(Ф9.53) 1/4’’ (Ф6.35) 5 5 10 30
MS11D-07HRN1-QB6+MOK-07HN1-QB6
MS11D-09HRN1-QB6+MOK-09HN1-QB6
MS11D-09HRN1-QC2+MOA2-09HN1-QC2
MS11D-12HRN1-QC2+MOB4-12HN1-QC2
1/2’’
(Ф12.7) 1/4’’ (Ф6.35)
5 5 10 30
MS11D-12HRN1-QB6+MOA2-12HN1-QB6
MS11D-12HRN1-QC2+MOB-11HN1-QC2
MS11D-18HRN1-QB8+MOC-18HN1-QB8 5 8 15 30
MS11D-18HRN1-QB6+MOB-18HN1-QB6
MS11D-21HRN1-QB6W+MOC-21HN1-QB6W
5/8’’
(Ф16.0) 3/8’’ (Ф9.53) 5 10 20 60
MS11D-21HRN1-QB8+MOP-21HN1-QB8W
MS11D-24HRN1-QB8W+MOF2-24HN1-QB8W
MS11D-24HRN1-QB6W+MOP-24HN1-QB6W
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.

18
6.4 Installation for the first time
Air and moisture in the refrigerant system have undesirable effects as below:
●Pressure in the system rises.
●Operating current rises.
●Cooling or heating efficiency drops.
●Moisture in the refrigerant circuit may freeze and block capillary tubing.
●Water may lead to corrosion of parts in the refrigerant system.
Therefore, the indoor units and the pipes between indoor and outdoor units must be leak tested
and evacuated to remove gas and moisture from the system.
Gas leak check (Soap water method):
Apply soap water or a liquid neutral detergent on the indoor unit connections or outdoor unit
connections by a soft brush to check for leakage of the connecting points of the piping. If bubbles
come out, the pipes have leakage.
1. Air purging with vacuum pump
1). Confirm that both the 2-way and 3-way valves are set to the opened position.
Remove the valve stem caps and confirm that the valve stems are in the opened position.
Be sure to use a hexagonal wrench to operate the valve stems.
2). Connect the charge hose with the push pin of handle lo to the 3-way valves gas service port.
(Indoor unit)
(Liquid side)
(Gas side)
Vacuum
pump
Vacuum
pump
Lo
Hi
Handle Hi
Two
-
way valve
Close
Manifold valve
Compound meter
Pressure
gauge
20Pa
Handle Lo
Charge hose
Charge hose
(Outdoor unit)
Close
Three
-way valve