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Midea
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9V
Service Manual
43 pgs1.86 Mb0

Midea 9V Service Manual

9VSAP-1010-A
SERVICE MANUAL
MIDEA AIRCONDITIONER
On-Off
9V SERIES
9220+9221
CONTENTS
1. Precaution .................................................................................................................................................... 1
1.1 Safety Precaution .......................................................................................................................... 1
1.2 Warning ......................................................................................................................................... 1
2. Function ........................................................................................................................................................ 6
3. Dimension .................................................................................................................................................... 9
3.1 Indoor Unit ..................................................................................................................................... 9
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 ...................................................................................................................................... 18
6.1 Wrench torque sheet for installation ........................................................................................... 18
6.2 Connecting the cables ................................................................................................................ 18
6.3 Pipe length and the elevat ion ..................................................................................................... 18
6.4 Air purging with vacuum pump .................................................................................................... 19
6.5 Pumping down (Re-installation) .................................................................................................. 20
6.6 Re-air purging (Re-installation) ................................................................................................... 22
6.7 Balance refrigerant of t he 2-way, 3-way valves .......................................................................... 23
6.8 Evacuation .................................................................................................................................. 24
6.9 Gas charging ............................................................................................................................... 25
7. Operation characteristics ......................................................................................................................... 26
8. Electronic function .................................................................................................................................... 27
8.1 Abbreviation ................................................................................................................................ 27
8.2 Display function ........................................................................................................................... 27
8.3 Main Protection ........................................................................................................................... 28
8.4 Operation Modes and Functions ................................................................................................. 28
9. Troubleshooting ......................................................................................................................................... 37
9.1 Indoor Unit Error Display ............................................................................................................. 37
9.2 Diagnosis and Solution ............................................................................................................... 38
1
1. Precaution
1.1 Safety Precaution
To prevent injury to the user or other people and pro perty damage, the following
instructions m us t be followed.
Incorrect operation due to ignoring instruction will cause harm or da mage. Before service unit, be sure to read this service manual at f i r st.
1.2 Warning
Installation
Do not use a defective or underr at ed circuit breaker. Use this appli ance on a dedicated
circuit.
There is risk of fire or electric shock.
For electrical work, contact the dealer, seller, a qualified el ect rician, or an Authorized
service center.
Do not disassemble or repair the product, there is risk of fire or electric shock.
Always ground t he product.
There is risk of fire or electric shock.
Install the panel and the cover of co ntr ol box 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 rated breaker of fuse.
There is risk of fire or electric shock.
Do not modify or extend the power c able.
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.
2
Sharp edges could cause injur y, be especially careful of the case edges and t he f ins on the condenser and evaporator.
For installation, always contact th e dealer or an A ut hori zed service center.
There is risk of fire, electric shock, explosion, or injury.
Do not inst all the product on a defective installation stand.
It may cause injury, accident, or dam age to the product.
Be sure the install ation 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 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 pull e d out or damaged dur ing
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 t he power supply plug during operat i on.
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 gas or combustible near the product.
There is risk of fire or failure of product.
Do not use the pro duc t in a tightly clos ed space for a long time.
Oxygen deficiency could occur.
When flammabl e gas leaks, turn off t he gas and open a window for ventilat ion before
turn the product on.
3
Do not use the telephone or t ur n sw it ches on or off. 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 o r hur ricane. If possible, r em ove 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 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 a n Author i z ed s er vice
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 po wer off when cleaning or maintaining the product.
There is risk of electric shock.
When the product is not be used for a l ong time, disco nnect the power supply plug or
turn off the breaker.
There is risk of product damage or failure, or unintended op er at io n.
Take care to ensure that nob ody could step on or fall onto the outdoor unit .
This could result in person al in jury and product damage.
 CAUTION
Always check for gas (refri ger ant) leakage after installation or re pair of product.
Low refrigerant levels may cause failure of product.
Install the drain hose to ensure that water is drained away properly.
4
A bad connection may cause water leakage.
Keep level even when installing the product.
To avoided vibration of w ater leakage.
Do not install the product where the noise or hot air from the outdoor unit could damage
the neighborho ods.
It may cause a problem for your neighbors.
Use two or more people to lift and transport t he pr oduct.
Avoid personal injury.
Do not install the product where it will be exp osed to sea wind (salt spray ) di r ect ly.
It may cause corrosion on the pr oduct . Corrosion, particu larly on the condenser and evaporat or fins, could cause product malfunction or inefficient operation.
 Operational
Do not expose th e sk i n directly to cool air for long periods of t ime. (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 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 failur e.
Use a soft cloth to clean. Do not use harsh detergen ts, solvents, etc.
There is risk of fire, electric shock, or damage to the plastic par ts 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 pro duct. (out door 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 mor e often if
necessary.
5
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 t hrough air inlet or out let while the p r oduct is
operated.
There are sharp and moving parts that could caus e pers onal injury.
Do not drink the water drained from the product.
It is not sanitary could ca use serious health issues.
Use a firm stool or ladder when clea ning or maintaining the produc t .
Be careful and avoid personal 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 di spose of batteri es in a fire.
They may burn of explode.
If the liquid from the batteries gets onto your s kin or clothes, was h it well with clean
water. Do not use the remote of the batt er i es have leaked.
The chemical in batteries could cause burns or other health hazards
6
2. Function
Model Names of Indoor/Outdoor Units Cooling only:
Series Capacity Indoor units Outdoor units
On-Off
7k MS9V-07CR-QB6 MOK2-07C-QB6
9k MS9V-09CR-QB6 MOK6-09C-QB6 12k MS9V-12CR-QB6 MOA1-12C-QB6 18k MS9V-18CR-QB MOB-18C-QB6
Cooling & Heating
Series Capacity Indoor units Outdoor units
On-Off
7k MS9V-07HR-QB6 MOK-07H-QB6
9k MS9V-09HR-QB6 MOK3-09H-QB6 12k MS9V-12HR-QB6 MOB-12H-QB6 18k MS9V-18HR-QB6 MOB-18H-QB6
7
Temp. Compensation
The mode can be change by the room temperature.
Auto mode
Easy clean panel
Indoor unit
Operation ON/OF by remote controller
Sensing by room temperature
Room temperature contr ol
Starting temperature co ntrol
Time Delay Safety control
Indoor fan speed control
Two-direction air vane
Sleep mode auto control
Independent dehumidification
Air flow Direction control
Anti-cold functio n
Room temperature sensor. Pipe temperature sensor.
Maintain the room temperature in accordance with the setting temperature.
Indoor fan is delayed for 5 sec at the starting
Restarting is for approx. 3 minutes..
Auto Restart Function
High, med, low, auto.
The unit will decide the louver direction according to operation mode.
The fan is turn to low speed (cooling/heating).
The function is usually used in rainy days in springtime or damp areas.
The louver can be set at the des i re d pos ition or swing up and down automatically
Self-diag. function
Timer function
Follow me
Self-cleaning
Prevent the cold wind at the beginning of unit start.
Auto defrost
Flexible wiring connection
When the power supply is interr upted and then restore, the air conditioners automatically restore the previous function setting
Ionizer (optional)
Indoor golden fin (optional)
8
It protects the valv es and pr events water from
dripping.
The unit has 3 min delay between co nt inuously ON/OFF
operations.
Outdoor unit
Power relay control
The hydrophilic fin can impr ove the heating efficiency at operation
mode.
Hydrophilic aluminum fin for heat pump models
It is only operated in the heatin g oper ation mode except defrosting
operation.
Anti-rust cabinet
Valv e pr otect i on cover
4 way valve control for heat pump models
Made from electrolytic zin c s t eel sheet and anti-rust coated
components.
Low noise air flow syst em
Bird tail propeller fan m akes the outdoor unit run more
quietly.
9
3. Dimension
3.1 Indoor Unit
Dimension Mode
W H D
MS9V-07CR-QB6/MS9V-07HR-QB6 845 290 165 MS9V-09CR-QB6/MS9V-09HR-QB6 845 290 165 MS9V-12CR-QB6/MS9V-12HR-QB6 845 290 165
MS9V-18CR-QB+MS9V-18HR-QB6 995 292 200
For smaller than 18K model:
For 18K model:
10
3.2 Outdoor Unit
MOK2-07C-QB6 MOK-07H-QB6 MOK6-09C-QB6 MOK3-09H-QB6
Dimension Mode
W D H
W1 A B
7K、9K
685 260 430 742 460 276
MOA1-12C-QB6 MOB-12H-QB6 MOB-18C-QB6 MOB-18H-QB6
Dimension Mode
W D H
W1 A B
MOA1-12C-QB6
700 235 535 760 458 250
MOB-12H-QB6 MOB-18C-QB6 MOB-18H-QB6
780 250 540 838 549 276
11
4. Refrigerant Cycle Diagram
Cooling only:
Heat pump mode:
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