How it Works
Midea
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MSG-12CRN2
Schematic
50 pgs1.72 Mb0

Midea MSG-07CRN2, MSG-07HRN2, MSG-09CRN2, MSG-09HRN2, MSG-12CRN2 Schematic

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MSG-07CRN2; MSG-07HRN2 MSG-09CRN2; MSG-09HRN2 MSG-12CRN2; MSG-12HRN2 MSG-16CRN2; MSG-16HRN2 MSG-18CRN2; MSG-18HRN2 MSG-21CRN2; MSG-21HRN2
Content
Content
1. Precaution....................................................................................................................1
2. Function .......................................................................................................................3
3. Dimension .................................................................................................................... 5
4. Specification ................................................................................................................7
5. Refrigerant cycle diagram......................................................................................... 11
6. Operation limits .........................................................................................................12
7. Schematic diagram and Wiring diagram .................................................................13
8. Installation details......................................................................................................19
8.5 Pumping down (Re-installation) ............................................................................................... 21
8.6 Re-air purging (Re-installation) ................................................................................................22
8.7 Balance refrigerant of the 2-way, 3-way valves........................................................................ 23
9. Capacity table ............................................................................................................26
10. Electronic function....................................................................................................32
- 1 -
Content
10.2 Proper symbols and their meaning .......................................................................................... 32
11. Model and Parameters ..............................................................................................40
12. Troubleshooting.........................................................................................................41
12.4 Resetting phenomenon often occurs during operation............................................................. 44
13. Characteristic of temperature sensor......................................................................46
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Service manual
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 a
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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.
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
Service manual
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 no body 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.
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.
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2. Function
Indoor unit
Operation ON/OFF by remote controller
Sensing by room temperature
Room temperature sensor. Pipe temperature sensor.
Room temperature control
Maintain the room temperature in accordance with the setting temperature.
Starting temperature control
Indoor fan is delayed for 5 sec at the starting.
Service manual
Time Delay Safety control
Restarting is for approx. 3 minutes..
Indoor fan speed control
High, med, low, breeze.
Operation indication Lamps (LED)
Light up in the LED (LCD) for each operation mode.
Two-direction air vane
The unit will decide the louver direction according to operation mode.
Sleep mode auto control
The fan is turn to low speed (cooling/heating). The unit will be turn off after seven hours.
Independent dehumidification
The function is usually used in rainy days in springtime or damp areas.
Self-diag. function
Anti-cold function
Prevent the cold wind at the beginning of unit start.
Temp. Compensation
Defrost mode
Auto-restart function
- 3 -
The function will be operate in any operation
Air flow Direction control
The louver can be set at the desired position or swing up and down automatically
Auto mode
The unit can be change by the room temperature.
Flexible wiring connection
Easy clean panel
Service manual
Outdoor unit
Power relay control
The unit has 3 mins delay between continuously ON/OFF operations.
Low ambient kit
The unit can operate in cooling mode at low ambient temperature conditions.
Low noise air flow system
Bird tail propeller fan makes the outdoor unit run more quietly.
Hydrophilic aluminum fin
The hydrophilic fin can improve the heating efficiency at operation mode.
4 way valve control
It is only operated in the heating operation mode except defrosting operation.
Discharge pipe temperature protect
Anti-rust cabinet
Made from electrolytic zinc steel sheet and anti-rust coated components.
Valve protection
It protects the valves and prevents water from dripping.
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3. Dimension
3.1 Indoor unit
Service manual
Dimension Mode
7K 750 250 188
9K 750 250 188 12K 750 250 188 16K 906 286 235 18K 906 286 235 21K 906 286 235
WH L
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3.2 Outdoor unit
Service manual
Dimension Mode
7K 700 535 235 458 280 540
9K 700 535 235 458 280 540 12K 780 540 250 530 315 590 16K 760 590 285 540 335 615 18K 760 590 285 540 335 615 21K 845 695 335 560 360 735
W H D L1L2L3
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/
4. Specification
Service manual
Model
Power supply
Capacity Btu/h
Cooling
Heating
Max. current Starting current
Compressor
Indoor fan motor
Indoor air flow (Hi/Mi/Lo) Indoor noise level (Hi/Mi/Lo)
Outdoor fan motor
Outdoor air flow Outdoor noise level Refrigerant type R407C Design pressure
Refrigerant piping
Operation temp Ambient temp Application area
Input W Rated current A EER Btu/w.h Capacity Btu/h Input W Rated current A COP W/W
Model Type Brand Capacity Btu/h 8086/8172 8086/8172 10800 Input W 765/785 765/785 1015 Rated current(RLA) A 3.52/3.34 3.52/3.34 4.5 Locked rotor Amp(LRA) A 21 21.0 19.8 Thermal protector UP3SE0591-T71 UP3SE0591-T71 UP3SE0591-T61 Capacitor uF Refrigerant oil ml Model Brand Welling Welling Welling Input W Capacitor uF Speed(hi/mi/lo) r/min 1020/960/900 1020/960/900 1100/1020/950
Model Brand Welling Welling WELLING Input W Capacitor uF Speed r/min
Liquid side/ Gas side mm Ф6.35/Ф9.53 Ф6.35/Ф9.53 Max. refrigerant pipe length m 10 10 10 Max. difference in level m 5 5 5
MSG-07CRN2 MSG-07HRN2 MSG-09CRN2
Ph-V-Hz
m3/h
dB(A)
m
dB(A)494952
MPa
m
1, 220-240V~,50Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz
7000 7000
780 780
3.5 3.5
9.0,2.6 9.0,2.6 9.0,2.6
----- 8000 -----
----- 800 -----
----- 3.6 -----
-----
A4.4 4.4 6
18 18 19.8
PG135X1C-4DZ2 PG135X1C-4DZ2 PG180X1C-4DZ3
Rotary Rotary Rotary
TOSHIBA TOSHIBA TOSHIBA
25 25 30
400 400 400
RPG13H RPG13H RPG13H
37.5 36.5 39.5
1.2 1.2 1.2
430/400/370 430/400/370 470/440/410
35/32/30 35/32/30 36/32/30
YDK24-6T YDK24-6T YDK24-6T
70 70 70
333
850 850 850
1500 1500 1600
650 740 620
2.8 2.8 2.8
17-30 17-30 17-30 18-45 -7 - 45 18-45 10-14 10-14 10-14
℃ ℃
A
3
h
g
2
2.9
9000 1000
4.4
-----
Ф6.35/Ф9.53
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.
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Service manual
/
Model
Power supply
Capacity Btu/h 9000
Cooling
Input W 1000 Rated current A 4.4 EER Btu/w.h Capacity Btu/h 11000 -----
Heating
Input W 1100 ----­Rated current A 4.9 -----
COP W/W 2.9 ----- 2.9 Max. current Starting current
Model
Type
Brand
Capacity Btu/h 10800 13550/13700 13550/13700
Compressor
Input W 1015 1290/1335 1290/1335
Rated current(RLA) A 4.5 6.1 6.1
Locked rotor Amp(LRA) A 19.8 33 33
Thermal protector UP3SE0591-T61 UP3RE0591-T56 UP3RE0591-T56
Capacitor uF
Refrigerant oil ml
Model
Indoor fan motor
Brand Welling WELLING WELLING
Input W
Capacitor uF
Speed(hi/mi/lo) r/min 1100/1020/950 1250/1150/1050 1250/1150/1050 Indoor air flow (Hi/Mi/Lo) Indoor noise level (Hi/Mi/Lo)
Model
Outdoor fan motor
Brand Welling WELLING WELLING
Input W
Capacitor uF
Speed r/min Outdoor air flow Outdoor noise level Refrigerant type R407C Design pressure
Refrigerant piping
Liquid side/ Gas side mm
Max. refrigerant pipe length m 10 10 10
Max. difference in level m 5 5 5 Operation temp Ambient temp
Application area
MSG-09HRN2 MSG-12CRN2 MSG-12HRN2
Ph-V-Hz
1, 220-240V~,50Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz
12000 12000
1330 1330
66
9.0,2.6 9.0 ,2.6 9.0 ,2.6 14000
1400
6.3
A6 7 8 A
19.8
PG180X1C-4DZ3
Rotary
33 33
PG225X2C-4FT PG225X2C-4FT
rotary rotary
TOSHIBA TOSHIBA TOSHIBA
30
400
35 35
480 480
RPG13H RPG18H RPG18H
38.5 50 50
1.2 1.5 1.5
m3/h
dB(A)
3
m
h
470/440/410
500/450/400 500/450/400
36/32/30 40/36/34 40/36/34
YDK24-6T
70
3
850
YDK25-6C YDK25-6C
68 68
2.5 2.5
900 900
1600 1900 1900
dB(A)525555
g 800 780 1100
MPa
2.8 2.8
2.8
Ф6.35/Ф9.53 Ф6.35/Ф12.7 Ф6.35/Ф12.7
℃ ℃
2
m
17-30
-7 - 45 18-45 18-45 14-21 18-26 18-26
17-30 17-30
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.
- 8 -
Service manual
/
Model
Power supply
Capacity Btu/h 16000 16000 17000
Cooling
Input W 1810 1820 1890 Rated current A 8.3 8.3 8.5 EER Btu/w.h 8.8, 2.6 8.8, 2.6 9.0, 2.63 Capacity Btu/h 18000
Heating
Input W 1660 Rated current A 7.6
COP W/W 3.2 Max. current Starting current
Model PG295*2CS-4KU1 PG295*2CS-4KU1 PG295*2CS-4KU1
Type Rotary Rotary Rotary
Brand GD Toshiba GD Toshiba GD Toshiba
Capacity Btu/h 18083 18083 18083
Compressor
Input W 1760 1760 1760
Rated current(RLA) A 8.5 8.5 8.5
Locked rotor Amp(LRA) A 40 40 40
Thermal protector Internal Internal Internal
Capacitor uF 35UF/370V 35UF/370V 35UF/370V
Refrigerant oil ml 750 750 750
Model
Indoor fan motor
Brand WELLING WELLING WELLING
Input W 53 53 53
Capacitor uF 1.5uF/450V 1.5uF/450V 1.5uF/450V
Speed(hi/mi/lo) r/min 1260/1100/1000 1260/1100/1000 1260/1100/1000 Indoor air flow (Hi/Mi/Lo) Indoor noise level (Hi/Mi/Lo)
Model
Outdoor fan motor
Brand WELLING WELLING WELLING
Input W
Capacitor uF
Speed r/min Outdoor air flow Outdoor noise level Refrigerant type R407C Design pressure
Refrigerant piping
Liquid side/ Gas side mm
Max. refrigerant pipe length m 10 10 10
Max. difference in level m 5 5 5 Operation temp Ambient temp
Application area
MSG-16CRN2 MSG-16HRN2 MSG18CRN2
Ph-V-Hz
1, 220-240V~,50Hz 220-240V~,50Hz 220-240V~,50Hz
A131313 A414141
RPG25 RPG25 RPG25
m3/h
800/770/740 800/770/740 800/770/740
dB(A) 42/40/38 42/40/38 42/40/38
YDK36-6 YDK36-6 YDK36-6
96 96 96
2.5μF/450V 2.5μF/450V
2.5μF/450V
900 900 900
3
m
h
dB(A) 53
g 1380
MPa 2.8
1900 1900 1900
53 53
1380 2200
2.8 2.8
Ф6.35/Ф12.7 Ф6.35/Ф12.7 Ф6.35/Ф12.7
℃ ℃
2
m
17-30 17-30 17-30 18-45 -7 - 45 18-45 25-35 25-35 30-40
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.
- 9 -
Service manual
/
Model
Power supply
Capacity Btu/h 17000
Cooling
Input W 1890 Rated current A 8.5 EER Btu/w.h 9.0, 2.63 Capacity Btu/h 19000
Heating
Input W 1900 Rated current A 8.6
COP W/W 2.93 Max. current Starting current
Model PG295*2CS-4KU1
Type Rotary
Brand GD Toshiba
Capacity Btu/h 18083 20800 20800
Compressor
Input W 1760 1970 1970
Rated current(RLA) A 8.5 9.2 9.2
Locked rotor Amp(LRA) A 40
Thermal protector Internal UP3SE0391-T09 UP3SE0391-T09
Capacitor uF 35UF/370V
Refrigerant oil ml 750
Model
Indoor fan motor
Brand WELLING WELLING WELLING
Input W 53
Capacitor uF 1.5uF/450V
Speed(hi/mi/lo) r/min 1260/1100/1000 1260/1100/1000 1260/1100/1000 Indoor air flow (Hi/Mi/Lo) Indoor noise level (Hi/Mi/Lo)
Model
Outdoor fan motor
Brand WELLING WELLING WELLING
Input W
Capacitor uF
Speed r/min Outdoor air flow Outdoor noise level Refrigerant type R407C Design pressure
Refrigerant piping
Liquid side/ Gas side mm
Max. refrigerant pipe length m 15 20 20
Max. difference in level m 8 10 10 Operation temp Ambient temp
Application area
MSG-18HRN2 MSG-21CRN2 MSG-21HRN2
Ph-V-Hz
1, 220-240V~,50Hz 1, 220-240V~,50Hz 1, 220-240V~,50Hz
18000 18000
2080 2080
9.5 9.5
8.7, 2.54 8.7, 2.54
----- 22000
-----
-----
-----
2450
11.2
2.63 A131313 A41
44 44
PG340X3CS-4KU2 PG340X3CS-4KU2
Rotary Rotary
TOSHIBA TOSHIBA
50 50
850 850
RPG25 RPG25 RPG25
53 53
1.5 1.5
m3/h
dB(A) 42/40/38
800/770/740 800/770/740 800/770/740
41/37/35 41/37/35
YDK36-6 YDK53-6KB YDK53-6KB
96 150 150
2.5μF/450V 3.0μF/450V 3.0μF/450V 900 840 840
3
m
h
1900 2300 2300
dB(A)535353
g
MPa
2100 2200
2.8 2.8
2100
2.8
Ф6.35/Ф12.7 Ф6.35/Ф12.7 Ф6.35/Ф12.7
℃ ℃
2
m
17-30 17-30 17-30
-7 - 45 18-45 -7 - 45 30-40 34-49 34-49
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.
- 10 -
Service manual
5. Refrigerant cycle diagram
¾ Cooling only
¾ Heat pump mode
- 11 -
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