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NEOLA ON-OFF SERIES
Service Manual 2012
11DSEU-B-1202
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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 elevat ion ..................................................................................................... 17
6.4 Installation for the fir st time ......................................................................................................... 18
6.5 Adding the refrigerant after running t he s ystem for many years ................................................ 21
6.6 Re-installation w hi le t he indoor unit need to be repaired ........................................................... 22
6.7 Re-installation w hi le t he 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 displa y .............................................................................................................. 38
9.2 Diagnosis and Solution ............................................................................................................... 39
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1. Precaution
1.1 Safety Precaution
To prevent injury t o t he us er or other people and property damage, the following
instructions m us t be followed.
Incorrect operation due to ignoring inst ruction 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 und err at ed circuit breaker. Use this appliance on a dedicat ed
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 electr ic shock.
Always ground t he product.
There is risk of fire or electric shock.
Install the panel and the cover of control b ox securely.
There is risk of fire of electric shock.
Always instal l a dedicated circuit and breaker.
Improper wiring or installation may cause fore or electric shock.
Use the correctly rat ed breaker of f use.
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 injur y, be especially careful of the case edges and t he f ins on the
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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 inst all the product on a def ective installation stand.
It may cause injury, accident, or damage to the product.
Be sure the install ation area does not deteriorate with a ge.
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 l ong time when the humidity is very high and a
door or a windo w is le ft open.
Moisture may condense and wet or damage furniture.
T ake care to ensure that power cable could not be pulled out or damag ed during
operation.
There is risk of fire or electric shock.
Do not place any t hing 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 electr ic 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 g as or combustible near the product.
There is risk of fire or failure of product.
Do not use the pro duc t in a tightly closed space for a long time.
Oxygen deficiency could occur.
When flammabl e gas leaks, turn off the gas and open a window for ventilation before
turn the product on.
Do not use the telephone or t ur n sw it ches on or off.
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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 sh ock or fire.
Stop operation and close the window in storm or hurrica ne . If possible, remove the
product from the window before the hurricane arrives.
There is risk of property damage, failure of product, or electric shoc k.
Do not open the inl et gri ll of the pro duct dur ing o perati on. ( Do not to uch t he electr ostatic
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 mai ntaining the pro duct.
There is risk of electric shock.
When the product is not be used for a long t ime, disconnect the power supply plug or
turn off the breaker.
There is risk of product dama ge or failure, or unintended operation.
T ake care to ensure that nobody could step on or fall onto the out door unit.
This could result in person al in jury and product damage.
CAUTION
Always check for gas (refri ger ant) leakage after inst allatio n or repair of product.
Low refrigerant levels may cause failure of product.
Install the drain h ose t o ensure that water is drained away pr op er l y.
A bad connection may cause water leakage.
Keep level even when installing the product.
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It can avoid vibration of water leakage.
Do not inst all the product wher e the noise or hot air from the outdoor unit could dama ge
the neighborho ods.
It may cause a problem for your neighbors.
Use two or more people to lift and t r ansport the product.
Avoid personal injury.
Do not install the product where it will be exposed to se a wind (salt spray) directly.
It may cause corrosion on the pr oduc t . Corr osion, particularly on the condenser and evaporator fins,
could cause product malfunction or inefficient operati on.
Operational
Do not expose th e sk i n directly to cool air f or long periods of time. (Do not sit in the
draft).
This could harm to your health.
Do not use the product for special purp oses, such as preser ving fo ods, works of art, etc.
It is a consumer air conditioner, not a precisi on refrigerant system.
There is risk of damage or loss of property.
Do not block the i nl e t or outlet of air flow.
It may cause product failur e.
Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.
There is risk of fire, electric shock, or damage to the plasti c 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 p ut anything on the product . (outdoor units)
There is risk of personal injury and f ailure of product.
Always insert the filt er securely. Clean the filter every two weeks or more often if
necessary.
A dirty filter r educes the efficiency of the air conditioner and could cause product malfun c t ion or
damage.
Do not insert hands or other object thro ugh air inlet or outlet whi l e t he product is
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operated.
There are sharp and moving p ar ts that could cause personal injur y.
Do not drink the water drained from the product.
It is not sanitary could ca use serious health issues.
Use a firm stool or l a dder when cleaning or m a i ntaining the product.
Be careful and avoid pers onal injury.
Replace the all batteries i n t he rem ote 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 batt er i es in a fire.
They may burn of explode.
If the liquid from t he 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 witho ut not ice for product improvement.
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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
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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
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3. Dimension
3.1 Indoor Units
D
W
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
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L
R
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
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MS11D-21HRN1-QB6W, MS11D-21HRN1-QB8, MS11D-24HRN1-QB6W, MS11D-24HRN1-QB8W
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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
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MOC-21HN1-QB6W, MOP-21HN1-QB8W, MOP-24HN1-QB6W, MOF2-24HN1-QB8W
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6. Installatio n 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 follow ing 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 determin ed 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 refrig er ant amount:
Model
Pipe si ze
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 an d the maximum permissive length is based on the
system reliability.
The oil trap should be inst all ed per 5-7 meters.
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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 corrosi on of parts in the refrigerant sys t em.
Therefore, the indoor units and the pipes between indoor and outdoor units must be leak tested
and evacuated to remove gas an d m oisture 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 i n t he 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 v alv es 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
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3). Air purging of the charge hose
Open the handle Lo valve of the ma ni fold valve slightly to purge air from the c harge hose for 5 seconds
and then close it quickly.
4). Set the 2-way valve to the close position
5). Operate the air conditi oner at t he cooling cycle and stop it when the gauge indi cat es 0.1MPa.
6). Set the 3-way valve to the closed position immediately.
Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa.
Disconnect the charge set, and tighten the 2-way and 3-way v alv e’s stem nuts.
Use a torque wrench to tight en t he 3-way valves service port cap to a torque o f 1. 8 kgf.m.
Be sure to check for gas lea kage.
2. Air pur gi ng by refrigerant
Procedure:
1). Confirm that both the 2-way and 3-way valves are set to the closed positi on.
2). Connect the charge set and a char ging cylinder to the service port of the 3-way valve.
3). Air purging.
Open the valves on the chargin g cylinder and the charge set. Purge the air by loosening the flare nut on
the 2-way valve approximately 45’ for 3 seconds the n closing it for 1 minute; repeat 3 times.
After purging the air, use a torque wrench to tight en the flare nut on the 2-way valve.
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4). Check the gas leakage.
Check the flare connections for gas leakage.
5). Discharge the refrigerant.
Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the
2-way valve approximatel y 45’ until the gauge indicates 0.3 to 0.5 Mpa.
6). Disconnect the charg e set and th e char gi ng cyli nder, and set the 2-way and 3-way valves to t he ope n
position.
Be sure to use a hexagonal wrench to operate the valve stems.
7). Mount the valve stems nuts and the service port cap.
Be sure to use a torque wrench to t ighten the service port cap to a torque 18N ·m.
Be sure to check the gas leakage.
3. Adding the refrigerant if the pipe length >5m
Procedure:
1). Connect the charge hose to t he c har ging cylinder , open t he 2-way valve and the 3-way valve.
Connect the charge hose w hich y ou disco nnecte d fr om the v acuu m pu mp to the v alve at the bot tom of
the cylinder. If the refrigerant is R410A, make the cylinder bottom up to ensure the liquid charge.
2). Purge the air from the charge h ose.
Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the
air (be careful of the liquid refrigerant).
Electronic scale
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3) Put the charging cylinder onto the electronic scale and record t he w eight.
4) Operate the air conditioner at the cooling mode.
5) Open the valves (Low side) on the charge set and charge the system with l i qui d r efrigerant.
6).When the electronic scale displays the proper weight (refer to the table), disconnect the charge hose
from the 3-way valve’ s ser vice port immediately and turn off the air conditioner before disconnecting the
hose.
7). Mount the valve stem caps and the service port
Use torque wrench to tighten the service port cap to a torque of 18N.m.
Be sure to check for gas lea kage.
6.5 Adding the refrigerant after running the system for many years
Procedure:
1). Connect the charge hose to t he 3-way service port, open the 2-way valv e and t he 3-way valve.
Connect the charge hose to the valve at the bottom of the cylinder. If the refrigerant is R410A, m ake
the cylinder bottom up to ensure liquid charge.
2). Purge the air from the charge h ose.
Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the
air (be careful of the liquid refrigerant).
Electronic scale
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3) Put the charging cylinder onto the electronic scale and recor d t he w eight.
4) Operate the air conditioner at t he c ool ing mode.
5) Open the valves (Low side) on the charge set and charge the system with l i qui d r efrigerant.
6).When the electronic scale displays the proper weight (refer to the gauge and t he pressure of the low
side), disconnect the charge hose from the 3-way valve’ s ser vice port immediately and turn off the air
conditioner before disconnecting the hose.
7). Mount the valve stem caps and the service port
Use torque wrench to tight en t he ser vice port cap to a torque of 18N.m.
Be sure to check for gas lea kage.
6.6 Re-installation while the indoor unit need to be repaired
1. Collecting the refrigerant into the outdoor unit
Procedure
1). Confirm that both the 2-way and 3-way valve s are set to the opened position
Remove the valve stem caps and confirm that the valve stems are i n t he 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.
3). Air purging of the charge hose.
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Open the handle Lo valve of the ma ni fold valve slightly to purge air from the c harge hose for 5 seconds
and then close it quickly.
4). Set the 2-way valve to the close position.
5). Operate the air conditi oner at t he cooling cycle and stop it when the gauge indi cat es 0.1MPa.
6). Set the 3-way valve to the closed position immediately
Do this quickly so that the gaug e ends up indicating 0.3 to 0.5Mpa.
Disconnect the charge set, and tighten the 2-way and 3-way v alv e’s stem nuts.
Use a torque wrench to tight en t he 3-way valves service port cap to a torque o f 1. 8 kgf.m.
Be sure to check for gas lea kage.
2. Air purgi ng by the refrigerant
Procedure:
1). Confirm that both the 2-way and 3-way valves are set to the closed positi on.
2). Connect the charge set and a char ging cylinder to the service port of the 3-way valve
Leave the valve on the chargin g cylinder closed.
3). Air purging.
Open the valves on the charging cylinder and the charge set. Purge t he air by loosening the flare nut on
the 2-way valve approximately 45’ for 3 seconds the n closing it for 1 minute; repeat 3 times.
After purging the air, use a torque wrench to tight en the flare nut on the 2-way valve.
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4). Check the gas leakage
Check the flare connections for gas leakage.
5). Discharge the refrigerant.
Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the
2-way valve approximatel y 45’ until the gauge indicates 0.3 to 0.5 Mpa.
6). Disconnect the charg e set and th e char gi ng cyli nder, and set the 2-way and 3-way valves to t he ope n
position
Be sure to use a hexagonal wrench to operate the valve stems.
7). Mount the valve stems nuts and the service port cap
Be sure to use a torque wrench to t ighten the service port cap to a torque 18N.m.
Be sure to check the gas leakage.
6.7 Re-installation while the outdoor unit need to be repaired
1. Evacuation for the whole sy stem
Procedure:
1). Confirm that both the 2-w ay and 3-way valve s are set to the opened positi on.
2). Connect the vacuum pump t o 3-way valve’s service port.
3). Evacuation for approxi mately one hour. Con firm that the compound meter indicates -0.1Mpa.
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4). Close the valve (Low side) on the charge set, turn off the vacuum pump, and confirm that the gauge
needle does not move (appr oximately 5 minutes after tur ning off the vacuum pump).
5). Disconnect the charge hose from the vacuum pump.
2. Refrigerant charging
Procedure:
1). Connect the charge hose to t he c har ging cylinder, open the 2-way valve and the 3-way valve
Connect the charge hose w hich y ou disco nnecte d fr om the v acuu m pu mp to the v alve at the bot tom of
the cylinder. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid c har ge.
2). Purge the air from the charge hose
Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the
air (be careful of the liquid refrigerant).
3) Put the charging cylinder onto the electronic scale and record t he w eight.
4). Open the valves (Low side) o n the charge set and charge the syste m with liquid refrigerant
If the system cannot be char ge w ith the specified amount of refrigerant, or can be charged with a little at
a time (approximately 150g each t ime) , operating the air condition er in the cooling cycle; however, one
time is not sufficient, w ait approximately 1 minute and then repeat the procedure.
5).When the electronic scale displays the proper weight, disconnect t he charge hose from the 3-way
valve’s service port immediately
Electronic scale
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If the system has been charged with liqu id refriger ant while oper ating the air c onditioner, turn off the air
conditioner before disconnecting the hose.
6). Mounted the valve stem cap s and the service port
Use torque wrench to tight en t he ser vice port cap to a torque of 18N.m.
Be sure to check for gas lea kage
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7. Operation characteristics
Temperature
Mode
Cooling operation
Heating
operation
Drying operation
Room temperature 17℃～32℃ 0℃～30℃
10℃～32℃
(<21000Btu/h models)
17℃～32℃
(≥21000Btu/h models)
Outdoor
temperature
18℃～43℃
-7℃～24℃
11℃～43℃
(<21000Btu/h models)
-5℃～43℃
(For the models with
low temperature cooling system)
18℃～43℃
(≥21000Btu/h models)
21℃～52℃
(For special tropical models )
21℃～52℃
(For special tropical models )
CAUTION:
1. If air conditioner is used outside o f t he above conditions, certain safety protection feat ures may
come into operation and cause t he unit to function abnormally.
2. Room relative humid ity less tha n 80%. I f the air c onditioner operat es in exce ss of this figure, the
surface of the air conditioner may attract condensation. Please set the vertical air flow louver to its
maximum angle (vertically to the floor), and set HIGH fan mode.
3. Optimum performance w ill be achieved within this operating temper at ur e.
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8. Electronic function
8.1 Abbreviation
T1: Indoor ambient temperature
T2: Coil temperature of indoor heat exc hanger
8.2 Display function
8.2.1 Icon explanation on indoor disp lay boar d.
One of the following figures matches its display board.
Run indicator
Flash at 0.5Hz when the unit is st andby. I ll uminate when the unit is turned on.
Timer indicator
This indicator illuminates when TIMER is set ON/OFF.
Defrost Indicator
This indicator illuminates when the air conditioner star ts defrosting
automatically or when the warm air contr ol fe ature is activ ated in heatin g mode
Temperature indicator
Displays the temperature settings when the air conditioner is operational. Displays
the malfunction code.
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8.3 Main Protection
8.3.1 Time Delay at restart for compressor.
8.3.2 Sensor protection a t open ci r c ui t and breaking dis connection.
8.3.3 Zero crossi ng detection error protection
If AC can not det ect z ero cros sing signals for 4 minutes or the zero cr ossing sig nal time intervals is not
correct, the unit will stop and the LED will display the failure. The correct zero crossing signal time
interval should be betwee n 6-13ms.
8.3.4 Fan Spe ed is out of control
When Indoor Fan Speed is too low(lower than 300RPM) lasting 50 seconds, the unit stops and LED
displays failure information and can’t returns to normal operatio n aut omatically.
8.4 Operation Modes and Functions
8.4.1 Fan mode.
(1) Outdoor fan and co mp r essor st op.
(2) Temperature setting function is disabled, and no setting temperature is displayed.
(3) Indoor fan can be set to high/med/low / auto.
(4) The louver operates same as in cooling mode.
(5) Auto fa n:
8.4.2 Cooling Mode
8.4.2.1 Compressor running rules:
Once the compressor star ts up, it will follow the below rules:
When indoor room temp.T 1 is l ow er t han Tn, the compressor and o utdoor fan will shut off. When T1 is
higher than Tm, the compr essor and out door fa n will st art up. (If the unit has refrigerant leakage Detect
function, the compressor will run 5.5 minutes first.)
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Ts
Ts-2
On
Off
8.4.2.2 Outdoor fan running rules:
The On-off outdoor units have single fan speed. The outdoor fan will run following the compressor
except when AC is in evaporator high temp. protection in heating mode ,condenser high temp.
protection in cooling mode, defrosting mode and the current protection.
8.4.2.3 Indoor fan running rules
In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low and
auto.
The auto fan:
5
T1-Ts
4
High
Low
1
Medium
8.4.2.4 Evaporator low t em perature T2 protection.
TE6
T2
On
Off
TE5
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When the evaporator coil temp.T2 keeps lower than TE5 for 5 minutes, the compressor and outdoor
fan will shut off.
When T2 is higher than TE6, the compressor and outdoor fan will restart up.
While TE5=4℃, TE 6=10℃ for 7k,9k,12k,18k models and TE5=3℃, TE 6=14℃ for 21,24 models.
8.4.3 Heating Mode (For Heating & Cooling mode l )
8.4.3.1 Compre ssor running rules:
When indoor room tem p.T1 is higher than Tj, th e compressor and outdoor fa n will shut off. When T1 is
lower than Tk, the compr essor and outdoor fan will start up.
TS+TB
T1
On
Off
TS+TB-2
While TB=2 for 7k,9k,12k,18k models and TB=0 for 21k,24k models
8.4.3.2 Out door fan running rules:
The outdoor units have single fan speed. The outdoor fan will run following the compressor except
when AC is in evaporator high temp. protection in heating mode , condenser high temp. protection in
cooling mode ,defrosting mode and the current protection.
8.4.3.3 Indoor fan running rules:
When the compressor is on, the indoor fan can be set to high/med/low/auto. And the anti-cold wind
function has the priority.
Anti-cold wind function:
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36
31
30
26
25
Setting
Low
Breeze
Off
20
Auto fan action :
2 0
T1-Ts
Medium
Low
0.0
When T1-Ts>2℃, the indoor fan will run at low spe ed.
When T1-Ts≤0℃, the indoor fan will run at medium speed.
8.4.3.4 Defrosting mode：
Conditi on of defrosting:
1、AC will enter defrostin g mo de i f all of the followi ng it ems is satisfied.
1.1 After the compressor keeps running 8 minutes, ΔT
max-ΔTmin≥4℃（ΔT=T2-T1）
1.2 AC meets A1 or A2.
A1: The cumulative compressor running time is between 45~120 minutes. Meanwhile the value of
T2-T1 meets the bel ow table.
℃
ΔT
High speed
＜TH
DEFROST
Medium speed
＜TM
DEFROST
Low speed
＜TL
DEFROST
Breeze/off No need to compare the T2 and T1
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A2: The cumulative compressor running time is over 120 minutes. Meanwhile the value of ΔT meets
the below table.
℃
ΔT
High speed
＜TH
DEFROST
+2
Medium speed
＜TM
DEFROST
+2
Low speed
＜TL
DEFROST
+2
While
Model
TH
DEFROST
(℃)
TM
DEFROST
(℃)
TL
DEFROST
(℃)
7k
14 15 16
MS11D-07HRN1-QC2
(2T0032100252)
12 13 14
9k
14
15
16
MS11D-09HRN1-QC2
(2T0032300764)
12 13 14
12k
12
13
14
18k
17
18
19
21k
16
17
18
24k
16 17 18
1.3
℃
T2
High speed
＜43℃
Medium speed
＜46℃
Low speed
＜48℃
About the setting defrosting time:
runtime（minute）
Defrosting time（minute）
Case 1 Runtime=45 10
Case 2
45＜runtime≤60
7.5
Case 3
60＜runtime≤90
8.5
Case 4
90＜runtime≤120
10
Case 5
120＜runtime
12
2、The cumulative com pressor running time is over 45 minutes .Meanwhile the indoor fan off or run in
breeze mode automatically (for Anti-cold wind function), AC will enter defrosting mode and the
defrosting time is ten minutes.
3、If the AC haven't defrost before running and the indoor fan running in slow mode over 2 minutes,
meanwhile 1.2 and 1.3 is satisfied and the cu mulat iv e compres sor run ning time is over 45 minutes, AC
will enter defrosting mode and the defrosting time is ten minutes.
Conditi on of ending defrosting:
If any one of the following items is satisfied, the defrosting will terminate and the machine will turn to
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normal heating mode.
(1) The defrosting time is rea ched t o t he setting value.
(2) After defrosting for 3 m inu t es , T2≥2℃.
(3) If the defrosting time is betw een 2 and 4 minutes, T2
max-T2min≥2℃.
Defrosting action
：
Compressor
on
off
on
on
on
off
off
off
4-way valve
Outdoor fan
Indoor fan
Indoor fan breeze(10s)
DF-5
DF
Setting defrosting time
F8
DF-5
DF
DF=25SEC for 7k,9k,12k models and DF=45SEC for 21k,24k models.
8.4.3.5 High evaporator coi l t em p.T2 protection:
Model
TE7
TE8
TE9
7k
60
53
50
9k
60
53
50
12k
63
53
51
MS11D-12HRN1-QC2
(2T0032400212)
63 44 42
18k
60
53
50
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21k
60
53
50
24k
60
53
50
8.4.4 Auto-mode
The machine will choose cooling, heating or fan-only mode according to ΔT (ΔT =T1-Ts).
ΔT=T1-Ts Running mode
ΔT＞2℃
Cooling
-3≤ΔT≤2℃
Fan-only
ΔT<-3℃
Heating(for cooling only models, they will run at fan-only mode)
AC will run in auto mode in the below cases:
（1） Press the forced auto button.
（2） If AC is off, it will run in auto mode when timer on function is active.
（3） After setting the mode, AC will run in auto mode if the compressor keeps not running for 15
minutes.
8.4.5 Drying mode
8.4.5.1 The compressor is cy cled running by 10 minutes on and then 5 minute s off. The indoor fan will
keep running at low speed.
8.4.5.2 In drying mode, if the room temperature is lower than 10 ℃, the indoor fan will run at breeze
while the compressor and outdoor fan will stop and not resu me until room temperature exceeds 13 ℃.
8.4.5.3 The system protection is active in this mode.
8.4.6 Forced operation funct i on
Press the touch button continually, the AC will run as below sequ ence:
Forced auto →Forced cooling →Off
Forced cooling mode:
The compressor and outdoor fan keep running and the indoor fan runs at low speed. After running for
30 minutes, AC will turn to auto mode with 24℃ setting temperature.
Forced auto mode:
The action of forced auto mode is the same as normal auto mode with 24℃ setting temperature.
When AC receives signals, such as switch on, switch off, timer on, timer off, mode setting, fan
speed setting, sleeping mode sett ing, follow me setting, it will quit t he forced operation.
The forced operation function can not be mem or ized if power off.
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8.4.7 Timer function
8.4.7.1 Timing range is 24 hours.
8.4.7.2 Timer on. The machine will tur n on aut omatically when reaching the set t ing time.
8.4.7.3 Timer off. The machine will turn off automatically w hen r eaching the setting time.
8.4.7.4 Timer on/off. The machine will turn on automatically when reaching the setting “on” time, and
then turn off automat ically when reaching the setting “off” time.
8.4.7.5 Timer off/on. The machine will turn off automatically when reaching the setting “off” time, and
then turn on automatically w hen r eaching the setting “on” time.
8.4.7.6 The timer function will not change the AC current operation mode. Suppose users set the
“timer off” function and AC is off now, the AC will keep the current running mode and t hen turn off when
reaching the setting time.
8.4.7.7 The setting time is r elat iv e t ime.
8.4.8 Sleep function mode
8.4.8.1 Operation time in sleep mode is 7 ho ur s. After 7 hours , the AC quits this mode and turns off.
8.4.8.2. Operation process in sleep mode is as follow:
After pressing ECONOM IC or SLEEP button on cont r oller, the machine will turn into sleep mode.
When cooli ng, t he setting temperature rises 1 ℃
(be lower th
setting temperature stops rising and indoor fan is fixed as low speed.
When heating, the setting temperature decreases 1 ℃
(be higher t
later the setting temperature stops rising and indoor fan is fixed as low speed.(Anti-cold wind function
has the priority)
8.4.8.3 Timer s et ting is available.
8.4.8.4 When user uses timer off function in sleep mode(or sleep function in timer off mode), if the
timing is less than 7 hours, sleep function w ill be cancel led when reac hing the setting tim e. If the timin g
is more than 7 hours, the mach ine w i ll n ot s t op unt i l reaches the setting time in sleep mode.
8.4.9 Auto-Restart function
The indoor unit is equipped with auto-restart function, which is carried out through an auto-restart
module. In case of a sudden power failure, the module memorizes the setting conditions before the
power failure. The unit will resume the previous operation setting (not including Swing function)
automatically after 3 m inutes when power returns.
If the memorization condition is forced cooling mode, the unit will run in cooling mode for 30 minutes
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and then turn to drying mode as 24 ℃ s e ttin g te m p.
8.4.10 Ionizer dust col l ector function (optional)
The indoor unit is equipped with Ionizer, which is controlled by the CLEAN AIR button on the remote
controller. When the unit is turned on, press the CLEAN AIR button to activate the function. Press it
again to stop the function. During the time when Ionizer being controlled by remote controller, Ionizer
will be turned of f a ut omatically, if indoor fan stops running due to malfunctions or ant i-cold-wind. When
indoor fan restarts after malfunctions being eliminated and anti-cold-wind being released, Ionizer will
be available again.
8.4.11 Louver Position M emory Function
When starting the unit again after shutting dow n, its louver will restore t o t he angle originally set by the
user, but the precondition is that the angle must be within the allowable range, if it exceeds, it will
memorize the maximum angle of the louver. During operation, if the power fails or the end user shuts
down the unit in the turbo mode, t he louver will restore to the default an gle.
8.4.12 Refrigerant Leakage Detection
With this new technology, the display area will show “EC” when the outdoor unit detects refrigerant
leakage.
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9. Troubleshooting
9.1 Indoor unit error display
For 7k, 9k, 12k, 18k
Display
Operation lamp flash times
Timer lamp
Failure
E1
1
X
EEPROM error
E2
2
X
Zero crossing detection err or
E3 3 X Indoor fan speed has been out of control
E4 4 X Default
E5 5 X
Indoor room temperature sensor T1 open circuit
or short circuit
E6 6 X
Evaporator coil temperature sensor T2 open
circuit or short circuit
EC
2
O
Refrigerant leak detection error
For 21k, 24k
Display
Operation lamp flash times
Timer lamp
Failure
E1
1
X
EEPROM error
E2
2
X
Zero crossing detection err or
E3 3 X
Indoor fan speed has been out of co nt r ol.
E4 4 X
Default
E5
5 X
Indoor room temperature sensor T1 open circuit
or short circuit
E6
6 X
Evaporator coil temperature sensor T2 open
circuit or short circuit
EC
2
O
Refrigerant leak detection error
E9 9 X
Indoor unit and outdoor unit communication error
O（light） X（off） ☆ （flash）
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9.2 Diagnosis and Solution
9.2.1 Indoor fan speed o ut of c ontrol diagnosis
Is the indoor fan motor connector and
connection good?
The unit does not work normally
Turn off the unit, rotate the cross
fan. Does it rotate freely?
No
Disassemble the connection between
fan and motor, check if the bearing is
normal. If not, change the bearing. If
yes, follow the below step.
Replace the fan motor
Yes
Replace the indoor PCB
No
Yes
Is the voltage bein g ap plie d to t he fa n
motor?
Yes
Shut off the power supp ly and turn on it 5s later
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9.2.2 Open or short circuit of temperature sensor diagnosis and solution.
9.2.3 EEPROM parameter error diagnosis and solution
9.2.4 Zero crossing detection error
When such failure occurs, t he ma in control board must have fault.
Shut off the power supply and turn on it 5s later
The problem comes out agai n
Is the EEPROM chip plugged i n indoor PCB well?
No
Correct the connection
Replace the main PCB of indoor unit
Yes
Replace outdoor PCB
Yes
Check the connections between
the sensors and the PCB. Are the
connections good?
Replace the sensor and check if
the errors happen again?
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9.2.5 Indoor / outdoor unit’s communicatio n error
No
Reconnect and retest
No
Yes
Yes
E1 after 8 munities
Check the wiring between indoor and outdoor
unit. Do the wires can work normal and connect
correctly?
No
Is all the wiring between terminal and
Indoor PCB connect ok?
Is all
the wiring to the Outdoor PCB
connecting correctly?
Reconnect and retest
Reconnect and retest
Yes
-24V<Vs<+24V? (Vs is th e
voltage between S and N).
Yes
No
Change the Indoor PCB. If the AC still
displays E1, Change the outdoor PC B.
Change the outdoor PCB. If the AC still
displays E1, Change the indoor PCB.
Turn of f the power supp ly, after 1 minute,
connect the power supply, turn on the
unit.
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9.2.6 Refrigerant Leakage Detecti on
Shut off the power supp ly and turn on it 5s later
The problem comes out agai n
Yes
Replace the T2 sensor
and check if the errors
happen again?
Is there any leakage? Especially the connection
parts, such as the gas valve and the liquid valve.
Is there cool air blowing out fro m the indoor air outlet?
No
No
Is there any block? (Such as the capillary or the
welded points of the pipes.)
Yes
Replace the indoor PCB
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