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Midea
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MS9A-18CR-QC2
Service Manual
61 pgs2.01 Mb0

Midea MS9A-09HR-QB6, MS9A-07CR-QB6, MS9A-09CR-QB6(A), MS9A-09CR-QC0, MS9A-09CR-QC4(A) Service Manual

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9ASAP-1301-A
SERVICE MANUAL
MIDEA AIRCONDITIONER
ASIA PACIFIC OCEAN MARKET
LUNA ON-OFF SERIES
CONTENTS
1. Precaution .................................................................................................................................................... 1
1.1 Safety Precaution .......................................................................................................................... 1
1.2 Warning ......................................................................................................................................... 1
2. Function ........................................................................................................................................................ 6
3. Dimension .................................................................................................................................................... 9
3.1 Indoor Units ................................................................................................................................... 9
3.2 Outdoor Units .............................................................................................................................. 12
4. Refrigerant Cycle Diagram ....................................................................................................................... 14
5. Wiring Diagram .......................................................................................................................................... 16
5.1 Indoor Units ................................................................................................................................. 16
5.2 Outdoor Units .............................................................................................................................. 21
6. Installation details ...................................................................................................................................... 29
6.1 Wrench torque sheet for installation ........................................................................................... 29
6.2 Connecting the cables ................................................................................................................ 29
6.3 Pipe length and the elevat ion ..................................................................................................... 30
6.4 Installation for the fir st time ......................................................................................................... 31
6.5 Adding the refrigerant after running t he s ystem for many years ................................................ 34
6.6 Re-installation w hi le t he indoor unit need to be repaired ........................................................... 35
6.7 Re-installation w hi le t he outdoor unit need to be repaired ......................................................... 37
7. Operation characteristics ......................................................................................................................... 40
8. Electronic function .................................................................................................................................... 41
8.1 Abbreviation ................................................................................................................................ 41
8.2 Display function ........................................................................................................................... 41
8.3 Main Protection ........................................................................................................................... 42
8.4 Operation Modes and Functions ................................................................................................. 43
9. Troubleshooting ......................................................................................................................................... 52
9.1 Indoor unit error displa y .............................................................................................................. 52
9.2 Diagnosis and Solution ............................................................................................................... 54
1
1. Precaution
1.1 Safety Precaution
To prevent injury t o t he us er or other people and property damage, the f ol lowing
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 underr at ed 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 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 electr ic 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 defect i ve 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 lo ng time when the humidi ty is very high and a
door or a windo w is le ft open.
Moisture may condense and wet or damage furniture.
Take 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 (operati on) 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 pr oduct, or electric shock.
Do not store or use flammable gas or combustible near the pro duc t .
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 flammable 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.
3
There is risk of explosion or fire.
If strange sound s , or s mall or smoke comes fr om 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 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 inle t gril l of the produ ct duri ng o peratio n. (Do not to uch the el ectr ost at ic
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 damage 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 installation 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.
4
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 l i ft and transport t he pr oduct.
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 malf unction or inefficient operation.
 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 foods, 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 plastic part s 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 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 malfunction 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 the batteries gets onto your skin or clothes, wash it wel l 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
5k MS9A-05CR-QD0 MOK-05CP-QD0
7k
MS9A-07CR-QB6 MOK2-07C-QB6
MS9A-07HR-QB6 MOK-07H-QB6
9k
MS9A-09CR-QB6 MOK6-09C-QB6
MS9A-09HR-QB6 MOK3-09H-QB6
MS9A-09CR-QB6(A) MOK8-09C-QB6
MS9A-09CR-QB6 MOK9-09C-QB6
MS9A-09CR-QC0 MOB1-09C-QC0
MS9A-09CR-QC4(A) MOB1-09C-QC4
12k
MS9A-12CR-QC4(A) MOB2-12C-QC4
MS9A-12CR-QB6 MOA1-12C-QB6
MS9A-12CR-QB6 MOA2-12C-QB6
MS9A-12HR-QB4 MOA1-12H-QB4
MS9A-12HR-QB6 MOB-12H-QB6
MS9A-12HR-QB6 MOA2-12H-QB6
18k
MS9A-18CR-QB6 MOB-18C-QB6
MS9A-18HR-QB6 MOB-18H-QB6
MS9A-18CR-PC4W(A) MOF-18C-QC4W
MS9A-18CR-QC2
MOF-18C-QC2
MS9A-18CR-QB8
MOB3-18C-QB8
MS9A-18CR-QC4(A) MOF2-18C-QC4
MS9A-18CR-QC0(A) MOC2-18C-QC0
7
MS9A-18CR-QC0(A) MOB1-18CP-QC0
MS9A-18CR-QC0 MOB2-18CP-QC0
21k MS9A-21HR-QB6W MOF4-21H-QB6W
22k
MS9A-22CR-QC0 MOF-22C-QC0
MS9A-22CR-QB8 MOF-22C-QB8
24k
MA9A-24HR-QB4W MOF-24H-QB4
8
Filter
Ionizer+(O)
Ionizer(O)
Silver Ico Filter(O)
Vitamin C Filter(O)
3M HAM Filter(O)
Bio Filter(O)
Golden Fin(O)
Killer of Formaldehyde
Compressor Crankcase Heater(O)
Self Clean(O)
Follow me(O)
8 degree heating(O)
Heat compensation(O)
Self-diag. function
H
ydrophilic aluminum fin
Anti-rust cabinet
Valve protection cover
PTC Heating Belt(O)
O: optional function
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3. Dimension
3.1 Indoor Units
Model W H D
MS9A-05CR-QD0
710 250 190
MS9A-07CR-QB6 MS9A-07HR-QB6
MS9A-09CR-QB6
MS9A-09HR-QB6
MS9A-09CR-QB6(A)
790 265 198
MS9A-09CR-QC0
MS9A-09CR-QC4(A)
MS9A-12CR-QB6
MS9A-12HR-QB4
MS9A-12HR-QB6
MS9A-12CR-QC4(A)
920 292 223
MS9A-18CR-QC0
MS9A-18CR-QB6
MS9A-18HR-QB6
MS9A-18CR-PC4W(A)
998 240 322
MS9A-18CR-QC2 MS9A-18CR-QB8
MS9A-18CR-QC4(A)
MS9A-18CR-QC0(A)
MS9A-21HR-QB6W
MS9A-22CR-QC0
MS9A-22CR-QB8
10
L
R
H
Model
R(mm)
L(mm)
H(mm)
Dimension of installation hole(mm)
MS9A-05CR-QD0
111.5 100 45
￠65
MS9A-07CR-QB6
MS9A-07HR-QB6
MS9A-09CR-QB6
MS9A-09HR-QB6
MS9A-09CR-QB6(A)
151
100 45
MS9A-09CR-QC0
MS9A-09CR-QC4(A)
MS9A-12CR-QB6 MS9A-12HR-QB4 MS9A-12HR-QB6 MS9A-18CR-QC2
118.5 100 45
MS9A-18CR-QB8 MS9A-18CR-QC4(A) MS9A-18CR-QC0(A)
MS9A-22CR-QC0
MS9A-22CR-QB8
MA9A-24HR-QB4W
MA9A-24HR-QB4W
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Model R(mm) L(mm) H(mm) Dimension of installation hole(mm)
MS9A-12CR-QC4(A)
186.5
150 45
￠65
MS9A-18CR-QC0
MS9A-18CR-QB6
MS9A-18HR-QB6
MS9A-18CR-PC4W(A)
120
100
45
H
L
R
12
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 D H
W1 A B
MOK-05CP-QD0
685 260 430 742 460 276
MOK2-07C-QB6
MOK-07H-QB6 MOK8-09C-QB6 MOK9-09C-QB6 MOK6-09C-QB6 MOK3-09H-QB6 MOA1-12C-QB6
700 240 540 757 458 250
MOA2-12C-QB6 MOA1-12H-QB4 MOA2-12H-QB6
MOB1-09C-QC0
780 250 540 843 549 276
MOB1-09C-QC4
13
MOB2-12C-QC4
MOB-12H-QB6
MOB-18C-QB6
MOB3-18C-QB8
MOB1-18CP-QC0 MOB2-18CP-QC0
MOB-18H-QB6
MOF-18C-QC4W
845 320 700 908 560 335
MOF-18C-QC2 MOF2-18C-QC4
MOF4-21H-QB6W
MOF-22C-QC0
MOF-22C-QB8
MOF-24H-QB4
MOC2-18C-QC0 760 285 590 823 530 290
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4. Refrigerant Cycle Diagram
For cooling only models:
INDOOR OUTDOOR
LIQUID SIDE
GAS SIDE
HEAT EXCHANGE (EVAPORATOR)
HEAT EXCHANGE
(CONDENSER)
COMPRESSOR
CAPILIARY TUBE
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For heat pump models:
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
16
5. Wiring Diagram
5.1 Indoor Units
MS9A-07CR-QB6, MS9A-09CR-QB6, MS9A-12CR-QB6
MS9A-07HR-QB6, MS9A-09HR-QB6, MS9A-12HR-QB4, MS9A-12HR-QB6, MS9A-18HR-QB6
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MS9A-18CR-QB6
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