Midea MSV1-07HRN1, MSV1-09HRN1, MSV1-09CRN1, MSV1-12CRN1, MSV1-12HRN1 Service Manual
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MSV1-07CRN1 MSV1-07HRN1
MSV1-09CRN1 MSV1-09HRN1
MSV1-12CRN1 MSV1-12HRN1
Content
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Content
1 Precaution....................................................................................................................1
1.1 Safety Precaution................................................................................................................................ 1
1.2 Warning............................................................................................................................................... 1
1.3 Function .............................................................................................................................................. 4
2 Dimension .................................................................................................................... 5
3 Specification ................................................................................................................6
4 Operation limits ...........................................................................................................9
5 Wiring diagram...........................................................................................................10
6 Installation details......................................................................................................12
6.1 Wrench torque sheet for installation.................................................................................................. 12
6.2 Connecting the cables....................................................................................................................... 12
6.3 Pipe length and the elevation ............................................................................................................ 12
6.4 Air purging of the piping and indoor unit............................................................................................ 13
6.5 Pumping down (Re-installation) ........................................................................................................ 15
6.6 Re-air purging (Re-installation) ......................................................................................................... 16
6.7 Balance refrigerant of the 2-way, 3-way valves ................................................................................. 17
6.8 Evacuation ........................................................................................................................................ 18
6.9 Gas charging..................................................................................................................................... 19
7 Electronic function....................................................................................................20
7.1 Electronic control working environment............................................................................................. 20
7.2 Proper symbols and their meaning.................................................................................................... 20
7.3 Function ............................................................................................................................................ 21
7.4 Protection.......................................................................................................................................... 21
7.5 Fan only mode .................................................................................................................................. 22
7.6 Cooling mode .................................................................................................................................... 22
7.7 Dehumidifying mode ......................................................................................................................... 23
7.8 Heating mode.................................................................................................................................... 23
7.9 Defrosting mode(available for heating mode).................................................................................... 24
7.10 Auto mode ....................................................................................................................................... 25
7.11 Force cooling function ..................................................................................................................... 25
7.12 Sleep mode ..................................................................................................................................... 26
7.13 Auto restart function ........................................................................................................................ 27
7.14 Ionizer (air clean) function............................................................................................................... 27
8 Model and Parameters ..............................................................................................28
9 Troubleshooting.........................................................................................................29
9.1 LCD Display board ............................................................................................................................ 29
9.2 Indoor Unit Error Display................................................................................................................... 30
9.3 Diagnostic chart ................................................................................................................................ 30
9.4 Resetting phenomenon often occurs during operation...................................................................... 31
9.5 Operation lamp flashes and Timer lamp off....................................................................................... 31
9.6 Operation lamp flashes and Timer lamp on....................................................................................... 32
9.7 Operation lamp off and Timer lamp flashes....................................................................................... 32
9.8 Operation lamp on and Timer lamp flashes....................................................................................... 32
9.9 Operation lamp flashes, Timer lamp flashes . ................................................................................... 32
Service manual
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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
¾ 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 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
windows 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.
Service manual
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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.
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.
¾ 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.
To 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.
Service manual
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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.
¾ 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 pr 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 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.
Service manual
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1.3 Function
¾ Indoor unit
1. Operation ON/OFF by remote controller
2. Sensing by room temperature
Room temperature sensor. Pipe temperature
sensor.
3. Room temperature control
Maintain the room temperature in accordance with
the setting temperature.
4. Starting temperature control
Indoor fan is delayed for 5 sec at the starting.
5. Time Delay Safety control
Restarting is for approx. 3 minutes.
6. Indoor fan speed control
Turbo, high, med, low, breeze.
7. Operation indication LCD
Light up in the LCD for each operation mode.
8. Two-direction air vane
The unit will decide the louver direction according
to operation mode.
9. Sleep mode auto control
The fan is turn to low speed (cooling/heating).
The unit will be turn off after seven hours.
10. Independent dehumidification
The function is usually used in rainy days in
springtime or damp areas
11. Self-diag. function
The function will be operate in any operation mode.
12. Air flow Direction control
The louver can be set at the desired position or
swing up and down automatically
13. Auto mode
The unit can be change by the room temperature.
14. Anti-cold function
Prevent the cold wind at the beginning of unit start.
15. Temp. Compensation
16. Defrost mode
17. Auto-restart function
18. Flexible wiring connection
19. Self-Clean
20. Ionizer
The function will be operated by remote
controller
¾ Outdoor unit
1. Power relay control
The unit has 3 mins delay between continuously
ON/OFF operations.
2. Low noise air flow system
Bird tail propeller fan makes the outdoor unit run
more quietly
3. Hydrophilic aluminum fin
The hydrophilic fin can improve the heating
efficiency at operation mode.
4. 4 way valve control
It is only operated in the heating operation mode
except defrosting operation.
5. Anti-rust cabinet
Made from electrolytic zinc steel sheet and anti-rust
coated components.
6. Valve protection cover
It protects the valves and prevents water from
dripping.
7. Discharge pipe temperature
Service manual
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2 Dimension
Indoor unit
Dimension
Mode
WHD
7K 795 270 165
9K 795 270 165
12K 845 286 165
outdoor unit
Dimension
Mode
WHDL1L2
7K 700 535 285 458 250
9K 780 540 250 549 266
12K 780 540 250 549 266
Service manual
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3 Specification
MSV1-07CRN1 MSV1-07HRN1 MSV1-09CRN1 MSV1-09HRN1
Ph-V-Hz
1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-230V~, 50Hz 1, 220-230V~, 50Hz
Capacity Btu/h 7000 7000 9000 9000
Input W 640 640 820 820
Rated current A 2.8 2.8 3.6 3.6
EER Btu/w.h 10.9 10.9 3.2 , 10.9 3.2 , 10.9
Capacity Btu/h —— 8000 —— 10300
Input W —— 650 —— 840
Rated current A —— 2.9 —— 3.7
COP W/W —— 12.31 —— 12.28
A5 5 5 6
A 15 15 21.7 21.7
Model PA82X1C-4DZDE PA82X1C-4DZDE PA108X1C-4FTDE PA108X1C-4FTDE
Type ROTARY ROTARY ROTARY ROTARY
Brand TOSHIBA TOSHIBA TOSHIBA TOSHIBA
Capacity Btu/h 6650 6650 8870 8870
Input W 680 680 915 915
Rated current(RLA) A 3.04/2.85 2.85 4 4
Locked rotor Amp(LRA) A 15 15 21.7 21.7
Thermal protector B135-135-241E/MRA1340
8
35-241E/MRA1340835-241E/MRA1343
35-241E/MRA1343
0
Capacitor uF 25 25 25 25
Refrigerant oil ml
STER OIL VG74 35STER OIL VG74 35TER OIL VG74 350TER OIL VG74 35
0
Model RPG20D RPG20D RPG20D RPG20D
Brand Welling Welling Welling Welling
Input W 32 32 38 38
Capacitor uF 1.2 1.2 1.2 1.2
Speed(hi/mi/lo) r/min 1040/900/800 1040/900/800 1040/900/800 1040/900/800
m3/h 450 450 550 550
dB(A) 36/33/30 36/33/30 38/35/32 38/35/32
Model YDK24-6T YDK24-6T YDK24-6F YDK24-6F
Brand Welling Welling Welling Welling
Input W 56 56 56 56
Capacitor uF 2.5 2.5 2.5 2.5
Speed r/min 800 800 800 800
m
3
/h
1500 1500 1800 1800
dB(A) 54 54 54 54
g R410A/800 R410A/820 R410A/900 R410A/900
MPa 4.2 4.2 4.2 4.2
Liquid side/ Gas side mm
Ф
6.35/Ф9.53
Ф
6.35/Ф9.53
Ф
6.35/Ф9.53
Ф
6.35/Ф9.53
Max. refrigerant pipe length
m10 10 10 10
Max. difference in level m 5 5 5 5
℃
17-30 17-30 17-30 17-30
℃
18-43 -7-43 18-43 -7-43
m
2
10-14 10-14 14-21 14-21
Operation temp
Ambient temp
Application area
Outdoor noise level
Refrigerant type R410A
Design pressure
Refrigerant
piping
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Outdoor
fan motor
Outdoor air flow
Max. current
Starting current
Compressor
Indoor
fan motor
Model
Power supply
Cooling
Heating
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are
normally somewhat different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product
improvement.
Service manual
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MSV1-12CRN1 MSV1-12HRN1
Ph-V-Hz
1, 220-240V~, 50Hz 1, 220-240V~, 50Hz
Capacity Btu/h 12000 12000
Input W 1090 1100
Rated current A 4.8 4.8
EER Btu/w.h 3.23 , 11.0 3.2 , 10.9
Capacity Btu/h —— 13000
Input W —— 1050
Rated current A —— 4.6
COP W/W —— 12.38
A8 8
A26 26
Model PA140X2C-4FT PA140X2C-4FT
Type ROTARY ROTARY
Brand TOSHIBA TOSHIBA
Capacity Btu/h 11567/11618 11567/11618
Input W 1145/1185 1145/1185
Rated current(RLA) A 5.3/5.15 5.3/5.15
Locked rotor Amp(LRA) A 26 26
Thermal protector
UP3RE0596-T56（INTERNAL：IOL） UP3RE0596-T56（INTERNAL：IOL）
Capacitor uF 35 35
Refrigerant oil ml RB68AF/T68/α68TF: 480 RB68AF/T68/α68TF: 480
Model RPG20D RPG20D
Brand Welling Welling
Input W 38 38
Capacitor uF 1.2 1.2
Speed(hi/mi/lo) r/min 1260/1080/900 1260/1080/900
m3/h 650 650
dB(A) 40/37/34 40/37/34
Model YDK24-6F YDK24-6F
Brand Welling Welling
Input W 56 56
Capacitor uF 2.5 2.5
Speed r/min 800 800
m
3
/h
1800 1800
dB(A) 55 55
g R410A/1050 R410A/1050
MPa 4.2 4.2
Liquid side/ Gas side mm Ф6.35/Ф12.7 Ф6.35/Ф12.7
Max. refrigerant pipe length
m10 10
Max. difference in level m 5 5
℃
17－30 17－30
℃
17－30 -7－43
m
2
18-26 18-26
Operation temp
Ambient temp
Application area
Outdoor noise level
Refrigerant type R410A
Design pressure
Refrigerant
piping
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Outdoor
fan motor
Outdoor air flow
Max. current
Starting current
Compressor
Indoor
fan motor
Model
Power supply
Cooling
Heating
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are
normally somewhat different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product
improvement.
Service manual
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Refrigerant cycle diagram
¾ Cooling only
¾ Heat pump mode
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