Cover
MSC-07CRN1; MSC-07HRN1
MSC-09CRN1; MSC-09HRN1
MSC-12CRN1; MSC-12HRN1
MSC-18CRN1; MSC-18HRN1
Content
Content
1.
Precaution .................................................................................................................... 1
1.1 Safety Precaution ......................................................................................................................... 1
1.2 Warning ........................................................................................................................................ 1
2.
Function ....................................................................................................................... 3
3.
Dimension .................................................................................................................... 5
3.1 Indoor unit..................................................................................................................................... 5
3.2 Outdoor unit.................................................................................................................................. 5
4.
Specification ................................................................................................................ 6
5.
Refrigerant cycle diagram........................................................................................... 8
6.
Operation limits ........................................................................................................... 9
6.1 Cooling operation ......................................................................................................................... 9
6.2 Heating operation ......................................................................................................................... 9
7.
Schematic diagram and Wiring diagram ................................................................. 11
7.1. Schematic diagram......................................................................................................................11
7.2. Wiring diagram ........................................................................................................................... 12
8.
Installation details...................................................................................................... 16
8.1 Wrench torque sheet for installation........................................................................................... 16
8.2 Connecting the cables................................................................................................................ 16
8.3 Pipe length and the elevation..................................................................................................... 16
8.4 Air purging of the piping and indoor unit .................................................................................... 18
8.5 Pumping down (Re-installation) ................................................................................................. 19
8.6 Re-air purging (Re-installation) .................................................................................................. 20
8.7 Balance refrigerant of the 2-way, 3-way valves ......................................................................... 21
8.8 Evacuation.................................................................................................................................. 22
8.9 Gas charging .............................................................................................................................. 23
9.
Pressure table............................................................................................................ 24
9.1 MSC-07CRN1............................................................................................................................. 24
9.2 MSC-07HRN1............................................................................................................................. 24
9.3 MSC-09CRN1............................................................................................................................. 24
9.4 MSC-09HRN1............................................................................................................................. 25
9.5 MSC-12CRN1............................................................................................................................. 25
9.6 MSC-12HRN1............................................................................................................................. 25
9.7 MSC-18CRN1............................................................................................................................. 26
9.8 MSC-18HRN1............................................................................................................................. 26
10. Capacity table ............................................................................................................ 27
10.1 MSC-07CRN1............................................................................................................................. 27
10.2 MSC-07HRN1............................................................................................................................. 27
2
Content
10.3 MSC-09CRN1............................................................................................................................. 28
10.4 MSC-09HRN1............................................................................................................................. 28
10.5 MSC-12CRN1............................................................................................................................. 29
10.6 MSC-12HRN1............................................................................................................................. 29
10.7 MSC-18CRN1............................................................................................................................. 30
10.8 MSC-18HRN1............................................................................................................................. 30
11. Electronic function .................................................................................................... 31
11.1 Proper symbols and their meaning ............................................................................................ 31
11.2 Function...................................................................................................................................... 31
11.3 Protection ................................................................................................................................... 31
11.4 Fan-only mode............................................................................................................................ 32
11.5 Cooling mode ............................................................................................................................. 32
11.6 Dehumidifying mode................................................................................................................... 33
11.7 Heating mode ............................................................................................................................. 34
11.8 Defrosting mode (available for heating mode)........................................................................... 35
11.9 Auto mode .................................................................................................................................. 36
11.10 Force cooling function ................................................................................................................ 36
11.11 Sleep mode ................................................................................................................................ 37
11.12 Auto restart function ................................................................................................................... 37
11.13 Turbo mode ................................................................................................................................ 37
11.14 PLASMA ( optional):................................................................................................................... 37
11.15 Anion( optional) .......................................................................................................................... 37
12. Model and Parameters .............................................................................................. 39
13. Troubleshooting......................................................................................................... 40
13.1 Display board.............................................................................................................................. 40
13.2 Troubleshooting.......................................................................................................................... 40
13.3 Diagnostic chart.......................................................................................................................... 41
13.4 Resetting phenomenon often occurs during operation.............................................................. 42
13.5 Operation lamp flashes and Timer lamp off. .............................................................................. 42
13.6 Operation lamp flashes and Timer lamp on. .............................................................................. 42
13.7 Operation lamp off and Timer lamp flashes ............................................................................... 43
13.8 Operation lamp on and Timer lamp flashes ............................................................................... 43
13.9 Operation lamp flashes, Timer lamp flashes ............................................................................. 43
14. Characteristic of temperature sensor ...................................................................... 44
3
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
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
1
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 nobody could step on or fall
onto the outdoor unit.
This could result in personal injury and product damage.
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.
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.
2
Service manual
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.
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.
Anion (Optional)
Tele Remote control (Optional)
Oxygen Generator (Optional)
UV Generator (Optional)
Two-direction air vane
The unit will decide the louver direction according to operation mode.
Anti-cold function
Prevent the cold wind at
the beginning of unit start.
Sleep mode auto control
The fan is turn to low speed (cooling/heating).
The unit will be turn off at the seventh hour.
Plasma (Optional)
The function will be operated
in any operation mode.
Independent dehumidification
The function is usually used in rainy days in
springtime or damp areas.
Temp. Compensation
Self-diag. function
Defrost mode
The function will be
operate in any operation
Auto-restart function
Air flow Direction control
The louver can be set at the desired position or swing up and
down automatically
Flexible wiring connection
Auto mode
The unit can be change by the room temperature.
3
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
Valve protection cover
It protects the valves and prevents water from dripping.
4
3. Dimension
3.1 Indoor unit
Service manual
Dimension
Mode
7K 750 250 188
9K 750 250 188
12K 815 280 195
18K 920 292 225
3.2 Outdoor unit
W H L
Dimension
Mode
7K 500 535 235 458 280 540
9K 780 540 250 548 266 560
12K 780 540 250 548 266 560
18K 845 695 335 560 360 715
5
W H L L1 L2 L3
4. Specification
Service manual
Model
Power supply
Capacity Btu/h 7000 7000 9000 9000
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 (R410A)
Refrigerant
piping
Operation temp
Ambient temp
Application area
Input W 640 640 820 820
Rated current A 2.9 2.9 3.8 3.8
EER Btu/w.h 10.9 10.9 10.9 10.9
Capacity Btu/h ----- 8500 ----- 11000
Input W ----- 690 ----- 890
Rated current A ----- 3.1 ----- 4
COP W/W ----- 3.6 ----- 3.6
Model
Type Rotary Rotary Rotary Rotary
Brand TOSHIBA TOSHIBA TOSHIBA TOSHIBA
Capacity Btu/h 7000 7000 9000 9000
Input W 730 730 920 920
Rated current(RLA) A 3.3 3.3 4.1 4.1
Locked rotor Amp(LRA) A 16 16 18.7 18.7
Thermal protector MRA13408-9087 MRA13408-9087 MRA13430-9087 MRA13430-9087
Capacitor uF 25 25 25 25
Refrigerant oil ml 300 300 330 330
Model RPG13H RPG13H RPG13H RPG13H
Brand Welling Welling Welling Welling
Input W 36.5 36.5 39.5 39.5
Capacitor uF 1.2 1.2 1.2 1.2
Speed(hi/mi/lo) r/min 1050/920/820 1050/920/820 1200/950/850 1200/950/850
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
Liquid side/ Gas side mm Ф6.35/Ф9.53 Ф6.35/Ф9.53 Ф6.35/Ф9.53 Ф6.35/Ф9.53
Max. pipe length m 20 20 20 20
Max. in level m 8 8 8 8
Ph-V-Hz
m3/h
dB(A)
m3/h 1500 1500 1800 1800
dB(A)
℃
℃
m2 10~14 10~14 14-21 14-21
MSC-07CRN1 MSC-07HRN1 MSC-09CRN1 MSC-09HRN1
1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz
A 5 3.8 4.5 4.5
A 15 17 17 20
PA82X1C-4DZDE PA82X1C-4DZDE PA108X1C-4FTDE PA108X1C-4FTDE
430/360/310
35/32/29
49
g
800
17-30
18~-45 -7-45 18-45 -7-45
450/400/350 450/400/350 500/430/370
35/32/30 35/32/30 37/34/31
49 49 50
820 900 920
17-30 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.
6
MSC-12CRN1
MSC-12HRN1
MSC-18CRN1
MSC-18HRN1
Model
Power supply
Capacity Btu/h 12000 12000 18000 18000
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 (R410A)
Refrigerant
piping
Operation temp
Ambient temp
Application area
Input W 1090 1090 1720 1720
Rated current A 5 5 7.8 7.8
EER Btu/w.h 11 11 11 11
Capacity Btu/h ----- 13000 ----- 19000
Input W ----- 1050 ----- 1630
Rated current A ----- 4.8 ----- 7.4
COP W/W ----- 3.6 ----- 3.4
Model PA140X2C-4FT PA140X2C-4FT
Type rotary rotary Rotary Rotary
Brand TOSHIBA TOSHIBA Toshiba Toshiba
Capacity Btu/h 12000 12000 16910 16910
Input W 1200 1200 1720 1720
Rated current(RLA) A 5.4 5.4 7.5 7.5
Locked rotor Amp(LRA) A 29.9 29.9 34.5 34.5
Thermal protector UP3RE0591-T56 UP3RE0591-T56 Internal Internal
Capacitor uF 35 35 45 45
Refrigerant oil ml 480 480 VG74 ·750 VG74 ·750
Model RPG13D RPG13D RPG28D RPG28D
Brand Welling Welling Welling Welling
Input W 44 44 53 53
Capacitor uF 1.2 1.2 1.5uF/450V 1.5uF/450V
Speed(hi/mi/lo) r/min 1220/1000/800 1220/1000/800 1180/1080/800 1180/1080/800
Model YDK24-6F YDK24-6F YDK53-6K YDK53-6K
Brand Welling Welling Welling Welling
Input W 56 56 125 125
Capacitor uF 2.5 2.5 3.5 3.5
Speed r/min 800 800 800 800
Liquid side/ Gas side mm Ф6.35/Ф12.7 Ф6.35/Ф12.7 Ф6.35/Ф12.7 Ф6.35/Ф12.7
Max. pipe length m 20 20 25 25
Max. in level m 8 8 10 10
Service manual
Ph-V-Hz
1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz 1, 220-240V~, 50Hz
A 8 7 7 11.5
A 33 30 30 42.5
PA200X2CS-4KU1 PA200X2CS-4KU1
m3/h
dB(A)
m3/h 2000 2000 2500 2500
dB(A)
g
℃
℃
m2 18-26 18-26 28-40 28~40
580/500/420
37/34/31
51
1050
17-30
18-45 7-45 18-45 -7-45
580/500/420 850/700/600 850/700/600
40/37/34 42/39/37 42/39/37
50 52 52
1080 1700 1740
17-30 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.
7
5. Refrigerant cycle diagram
Cooling only
Service manual
Heat pump mode
8
6. Operation limits
6.1 Cooling operation
Outdoor unit air temp.℃ DB
Service manual
Indoor air temp. ℃ DB
Note: The chart is the result from the continuous operation under constant air temperature conditions.
However, excludes the initial pull-down stage.
6.2 Heating operation
Indoor air temp. ℃ DB
Outdoor unit air temp.℃ DB
Note: The chart is the result from the continuous operation under constant air temperature conditions.
However, excludes the initial pull-down stage.
9
Service manual
10
Service manual
7. Schematic diagram and Wiring diagram
7.1. Schematic diagram
11
Service manual
7.2. Wiring diagram
7.2.1 MSC-07CRN1, MSC-09CRN1, MSC-12CRN1
12
Service manual
7.2.2 MSC-07HRN1, MSC-09HRN1, MSC-12HRN1
13
7.2.3 MSC-18CRN1
Service manual
I NDOOR UNI T
OUTDOOR UNI T
OVERLOAD
RELAY
COMPRESSOR
Y/ G
RED
C
S
WHI TE
BLUE
R
COMPRESSOR
CAPACI TOR
BLACK
BLACK
FAN
MOTOR
Y&G
BLACK
RED
BLUE
FAN
CAPACI TOR
14
7.2.4 MSC-18HRN1
Service manual
OVERLOAD
RELAY
COMPRESSOR
Y/ G
RED
C
S
WHI TE
BLUE
R
COMPRESSOR
BLUE
CAPACI TOR
BLUE
BLACK
4- WAY
BLACK
BLACK
FAN
MOTOR
I NDOOR UNI T
OUTDOOR UNI T
Y&G
RED
BLUE
FAN
CAPACI TOR
15
Service manual
8. Installation details
8.1 Wrench torque sheet for installation
Outside diameter Torque
mm inch Kg.m
φ
6.35
φ
9.52
φ
12.7
1/4 1.8
3/8 4.2
1/2 5.5
8.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Grade
Unit 7K 9K 12K
2
mm
1.0 1.0 1.5 2.5
18K
8.3 Pipe length and the elevation
Capacity
Btu/h
Pipe size
GAS LIQUID
Standard
length(m)
Max.
ElevationB (m)
Max. Pipe
lengthA (m)
Additional
refrigerant(g/m)
07k~09K
12K
18K
3/8’’ (
9.52)
1/2’’ (
12.7)
1/2’’ (
12.7)
φ
φ
φ
1/4’’ (
6.35)
1/4’’ (
6.35)
1/4’’ (
6.35)
φ
φ
φ
5 5 10 30
5 5 10 30
5 8 15 30
16
Service manual
In case that
more than 5m.
Caution:
Capacity is base on standard length and maximum allowance length is base of reliability.
Oil trap should be install per 5-7 meters.
17
Service manual
8.4 Air purging of the piping and indoor unit
Required tools:
Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector.
Note:
The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will
affect the compressor, reduce the cooling capacity, and could lead to a malfunction of unit.
Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it
prevents the gas leakage from the refrigeration cycle.
Procedure
1. Recheck the piping connections.
2. Open the valve stem of the 2-way valve
counterclockwise approximately 90’, wait 10
seconds, and then set it to closed position.
Be sure to use a hexagonal wrench to operate
the valve stem
3. Check for gas leakage.
Check the flare connection for gas leakage
4. Purge the air from the system.
Set the 2-way valve to the open position and
remove the cap from the 3-way valve’s service
port.
Using the hexagonal wrench to press the valve
core pin, discharge for three seconds and then
wait for one minute.
5. Use torque wrench to tighten the service
port cap to a torque of 1.8 kg.m. (18n.m)
6. Set the 3-way valve to the opened position.
7. Mounted the valve stem nuts to the 2-way
and 3-way valves.
8. Check for gas leakage.
At this time, especially check for gas leakage
from the 2-way and 3-way stem nuts, and from
the service port.
Caution:
If gas leakage is discovered in step (3) above,
take the following measures.
If the leaks stop when the piping connections are
tightened further, continue working from step (4).
If the gas leaks do not stop when the connections
are retightened, repair the location of the leak,
discharge all of the gas through the service port,
and then recharge with the specified amount of
gas from a gas cylinder.
18
8.5 Pumping down (Re-installation)
Service manual
Procedure
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 in the opened position.
Be sure to use a hexagonal wrench to operate the valve stems.
2. Operate the unit for 10 to 15 minutes.
3. Stop operation and wait for 3 minutes, then connect the charge set to the service port of the 3-way
valve.
Connect the charge hose with the push pin to the gas service port.
4. Air purging of the charge hose.
Open the low-pressure valve on the charge set slightly to purge air from the charge hose.
5. Set the 2-way valve to the close position.
6. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa.
7. Immediately set the 3-way valve to the closed position.
Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa.
8. Disconnect the charge set, and amount the 2-way and 3-way valve’s stem nuts and service port
caps.
Use a torque wrench to tighten the service port cap to a torque of 1.8 kg.m.
Be sure to check for gas leakage.
19
8.6 Re-air purging (Re-installation)
Service manual
Procedure:
1. Confirm that both the 2-way and 3-way valves are set to the closed position.
2. Connect the charge set and a charging cylinder to the service port of the 3-way valve.
Leave the valve on the charging cylinder closed.
3. Air purging.
Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut on
the 2-way valve approximately 45’ for 3 seconds then closing it for 1 minutes; repeat 3 times.
After purging the air, use a torque wrench to tighten the flare nut to on the 2-way valve.
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 until the gauge indicate 0.3 to 0.5
Mpa.
6. Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the
open 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 tighten the service port cap to a torque 18N.m.
Be sure to check the gas leakage.
20
Service manual
8.7 Balance refrigerant of the 2-way, 3-way valves
Procedure:
1. Confirm that both the 2-way and 3-way valves are set to the open position.
2. Connect the charge set to the 3-way valve’s service port.
Leave the valve on the charge set closed.
Connect the charge hose with the push pin to the service port.
3. Open the valves (Low side) on the charge set and discharge the refrigerant until the gauge
indicates 0.05 to 0.1 Mpa.
If there is no air in the refrigeration cycle [the pressure when the air conditioner is not running is higher
than 0.1Mpa, discharge the refrigerant until the gauge indicates 0.05 to 0.1 Mpa. If this is the case, it will
not be necessary to apply a evacuation.
Discharge the refrigeration gradually; if it is discharged too suddenly, the refrigeration oil sill be
discharged.
21
8.8 Evacuation
Service manual
Procedure:
1. Connect the vacuum pump to the charge set’s centre hose.
2. Evacuation for approximately one hour.
Confirm that the gauge needle has moved toward -0.1 Mpa (-76 cmHg) [vacuum of 4 mmHg or less].
3. Close the valve (Low side) on the charge set, turn off the vacuum pump, and confirm that the
gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).
4. Disconnect the charge hose from the vacuum pump.
Vacuum pump oil, if the vacuum pump oil becomes dirty or depleted, replenish as needle.
22
8.9 Gas charging
Service manual
Procedure:
1. Connect the charge hose to the charging cylinder.
Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the
cylinder.
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. Open the valves (Low side) on the charge set and charge the system with liquid refrigerant.
If the system cannot be charge with the specified amount of refrigerant, if can be charged with a little at a
time (approximately 150g each time0 while operating the air conditioner in the cooling cycle; however, one
time is not sufficient, wait approximately 1 minute and then repeat the procedure.(pumping down-pin).
4. Immediately disconnect the charge hose from the 3-way valve’s service port.
Stopping partway will allow the refrigerant to be discharged.
If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the air
conditioner before disconnecting the hose.
5. Mounted 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 leakage.
23
Service manual
Heating mode
OUTDOOR CONDITIONS
7ºC D
4ºC D
15ºC
Pressure( kg/cm
) 24.0 23.0
21.5 21.0 20..5
/
18ºC
Pressure( kg/cm
) 2
4.6 23.5 2
3.0 22.6 20.8 /
20ºC
Pressure( kg/cm
) 2
5.0 24.2 24.0 23.0 21.0 /
22ºC
Pressure( kg/cm
) 2
5.3 24.6 24.5 23.8 21.7 /
9. Pressure table
Note:
The pressure data is from 3 way valve, the pressure data are pressure above atmosphere.
D: Dry bulb temp.
W: Wet bulb temp.
9.1 MSC-07CRN1
Cooling mode Outdoor temperature (Dry bulb temp)
Indoor Conditions
21ºC D15ºC W Pressure(kg/cm2 ) 6.2 6.7 7.2 8.0 8.5 9.4
24ºC D17ºC W Pressure(kg/cm2) 6.3 6.5 7.5 8.1 8.7 9.5
27ºC D19ºC W Pressure(kg/cm2) 6.1 6.8 7.7 8.2 9.0 10.0
32ºC D23ºC W Pressure(kg/cm2) 7.0 7.3 7.8 8.4 9.2 10.1
9.2 MSC-07HRN1
Cooling mode
Indoor Conditions
21ºC D15ºC W Pressure( kg/cm2 ) 6.2 6.7 7.2 8.0 8.5 9.4
24ºC D17ºC W Pressure( kg/cm2 ) 6.3 6.5 7.5 8.1 8.7 9.5
27ºC D19ºC W Pressure( kg/cm2 ) 6.1 6.8 7.7 8.2 9.0 10.0
32ºC D23ºC W Pressure( kg/cm2 ) 7.0 7.3 7.8 8.4 9.2 10.1
Indoor Conditions
Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Outdoor temperature (Dry bulb temp)
Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Pressure
12ºC D
2
2
2
2
0ºC D -
-7ºC D -15ºC D
9.3 MSC-09CRN1
Cooling mode Outdoor temperature (Dry bulb temp)
Indoor Conditions
21ºC D15ºC W Pressure( kg/cm2 ) 7.8 8.1 8.4 9.0 9.3 10.0
24ºC D17ºC W Pressure( kg/cm2 ) 7.9 8.2 8.7 9.0 9.5 10.1
27ºC D19ºC W Pressure( kg/cm2 ) 8.0 8.5 9.2 9.9 10.2 10.8
32ºC D23ºC W Pressure( kg/cm2 ) 8.8 9.1 9.2 10.0 10.5 11.2
24
Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
D
9.4 MSC-09HRN1
Cooling mode Outdoor temperature (Dry bulb temp)
Service manual
Indoor Conditions
21ºC D15ºC W Pressure( kg/cm2 ) 7.8 8.1 8.4 9.0 9.3 10.0
24ºC D17ºC W Pressure( kg/cm2 ) 7.9 8.2 8.7 9.0 9.5 10.1
27ºC D19ºC W Pressure( kg/cm2 ) 8.0 8.5 9.2 9.9 10.2 10.8
32ºC D23ºC W Pressure( kg/cm2 ) 8.8 9.1 9.2 10.0 10.5 11.2
Heating mode OUTDOOR CONDITIONS
Indoor Conditions
15ºC Pressure( kg/cm2 ) 26.5 25.0 22.0 21.5 20.5 /
18ºC Pressure( kg/cm2 ) 27.0 26.0 23.5 22.5 20.8 /
20ºC Pressure( kg/cm2 ) 27.5 26.5 25.0 23.0 21.0 /
22ºC Pressure( kg/cm2 ) 28.5 27.0 25.5 23.9 21.5 /
9.5 MSC-12CRN1
Cooling mode Outdoor temperature (Dry bulb temp)
Indoor Conditions
Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Pressure
Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
12ºC D
11ºC W
7ºC D
6ºC W
0ºC D
-1ºC W
-4ºC D
-6ºC W
-7ºC D
-9ºC W
-15ºC D
-xºC W
21ºC D15ºC W Pressure( kg/cm2 ) 8.4 8.5 8.8 8.9 9.4 9.9
24ºC D17ºC W Pressure( kg/cm2 ) 8.6 8.8 9.2 9.4 10.0 10.4
27ºC D19ºC W Pressure( kg/cm2 ) 8.8 9.2 9.4 9.8 10.3 10.9
32ºC D23ºC W Pressure( kg/cm2 ) 9.2 9.6 9.9 10.4 10.8 11.2
9.6 MSC-12HRN1
Cooling mode Outdoor temperature (Dry bulb temp)
Indoor Conditions
21ºC D15ºC W Pressure( kg/cm2 ) 8.4 8.5 8.8 8.9 9.4 9.9
24ºC D17ºC W Pressure( kg/cm2 ) 8.6 8.8 9.2 9.4 10.0 10.4
27ºC D19ºC W Pressure( kg/cm2 ) 8.8 9.2 9.4 9.8 10.3 10.9
32ºC D23ºC W Pressure( kg/cm2 ) 9.2 9.6 9.9 10.4 10.8 11.2
Heating mode OUTDOOR CONDITIONS
Indoor Conditions
15ºC Pressure( kg/cm2 ) 27.4 25.9 22.2 21.4 20.0 /
Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Pressure
12ºC D
11ºC W
7ºC
6ºC W
0ºC D
-1ºC W
-4ºC D
-6ºC W
-7ºC D
-9ºC W
-15ºC D
-xºC W
18ºC Pressure( kg/cm2 ) 29.8 27.2 23.8 22.0 21.1 /
20ºC Pressure( kg/cm2 ) 30.2 29.1 24.2 23.6 22.1 /
22ºC Pressure( kg/cm2 ) 32.4 30.1 25.4 24.0 22.7 /
25
9.7 MSC-18CRN1
Cooling mode Outdoor temperature (Dry bulb temp)
Service manual
Indoor Conditions
21ºC D15ºC W Pressure( kg/cm2 ) 8.5 8.6 8.9 9.0 9.4 9.9
24ºC D17ºC W Pressure( kg/cm2 ) 8.7 8.9 9.3 9.5 10.0 10.5
27ºC D19ºC W Pressure( kg/cm2 ) 8.9 9.2 9.5 9.9 10.4 10.9
32ºC D23ºC W Pressure( kg/cm2 ) 9.3 9.7 9.9 10.5 10.9 11.3
9.8 MSC-18HRN1
Cooling mode Outdoor temperature (Dry bulb temp)
Indoor Conditions
21ºC D15ºC W Pressure( kg/cm2 ) 8.5 8.6 8.9 9.0 9.4 9.9
24ºC D17ºC W Pressure( kg/cm2 ) 8.7 8.9 9.3 9.5 10.0 10.5
27ºC D19ºC W Pressure( kg/cm2 ) 8.9 9.2 9.5 9.9 10.4 10.9
32ºC D23ºC W Pressure( kg/cm2 ) 9.3 9.7 9.9 10.5 10.9 11.3
Heating mode OUTDOOR CONDITIONS
Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Indoor Conditions
15ºC Pressure( kg/cm2 ) 28.2 27.0 21.4 20.6 20.2 /
18ºC Pressure( kg/cm2 ) 30.6 28.2 24.6 22.8 22.1 /
20ºC Pressure( kg/cm2 ) 31.2 29.9 25.2 24.6 23.1 /
22ºC Pressure( kg/cm2 ) 33.3 31.1 26.2 25.2 23.8 /
Pressure
12ºC D
11ºC W
7ºC D
6ºC W
0ºC D
-1ºC W
-4ºC D
-6ºC W
-7ºC D
-9ºC W
-15ºC D
-xºC W
26
Service manual
10. Capacity table
10.1 MSC-07CRN1
SUMMER OUTDOOR TEMPERATURE DRY
Indoor Conditions
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
Total capacity kW 2.04 1.94 1.7 1.61 1.53 1.41
Sensitive capacity kW
Input kW. 0.53 0.58 0.6 0.67 0.73 0.8
Total capacity kW 2.14 2.05 1.93 1.81 1.73 1.51
Sensitive capacity kW
Input kW. 0.54 0.6 0.62 0.7 0.74 0.82
Total capacity kW 2.31 2.24
Sensitive capacity kW
Input kW. 0.57 0.62
Total capacity kW 2.33 2.36 2.31 2.25 2.15 2.03
Sensitive capacity kW
Input kW. 0.58 0.64 0.66 0.73 0.8 0.86
25ºC
1.52 1.41 1.39 1.32 1.19 1.07
1.61 1.46 1.45 1.54 1.23 1.15
1.78 1.65
1.83 1.67 1.65 1.64 1.57 1.52
30ºC
35ºC
2.10
1.56
0.64
40ºC
1.95 1.7 1.65
1.43 1.26 1.28
0.71 0.75 0.83
45ºC
50ºC
10.2 MSC-07HRN1
SUMMER OUTDOOR TEMPERATURE DRY
Indoor Conditions
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
WINTER OUTDOOR CONDITIONS
Indoor Conditions
15ºC
18ºC
20ºC
22ºC
27
Total capacity kW 2.04 1.94 1.7 1.61 1.53 1.41
Sensitive capacity kW
Input kW. 0.53 0.58 0.6 0.67 0.73 0.8
Total capacity kW 2.14 2.05 1.93 1.81 1.73 1.51
Sensitive capacity kW
Input kW. 0.54 0.6 0.62 0.7 0.74 0.82
Total capacity kW 2.31 2.24
Sensitive capacity kW
Input kW. 0.57 0.62
Total capacity kW 2.33 2.36 2.31 2.25 2.15 2.03
Sensitive capacity kW
Input kW. 0.58 0.64 0.66 0.73 0.8 0.86
Capacity kW 3.01 2.73
Input kW. 0.76 0.66
Capacity kW 2.86 2.64
Input kW. 0.78 0.67
Capacity kW 2.77
Input kW. 0.81
Capacity kW 2.61 2.23
25ºC
1.52 1.41 1.39 1.32 1.19 1.07
1.61 1.46 1.45 1.54 1.23 1.15
1.78 1.65
1.83 1.67 1.65 1.64 1.57 1.52
12ºC D
11ºC W
30ºC
7ºC D
6ºC W
2.31
0.65
35ºC
2.10
1.56
0.64
4ºC D
3ºC W
2.47 1.76 1.65 1.58
2.34 1.69 1.53 1.41
0.62 0.59 0.62 0.47
2.22 1.62 1.59 1.33
0.64 0.59 0.53 0.48
2.13 1.58 1.26 1.17
0ºC D
-1ºC W
0.6 0.58 0.5 0.45
40ºC
1.95 1.7 1.65
1.43 1.26 1.28
0.71 0.75 0.83
45ºC
-4ºC D
-6ºC W
50ºC
-7ºC D
-8ºC
W
Service manual
Input kW. 0.83 0.68
0.65 0.6 0.56 0.51
10.3 MSC-09CRN1
SUMMER OUTDOOR TEMPERATURE DRY
Indoor Conditions
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
Total capacity kW 2.42 2.41 2.24 2.03 1.87 1.75
Sensitive capacity kW
Input kW. 0.72 0.75 0.8 0.84 0.89 0.97
Total capacity kW 0.65 2.55 2.45 2.24 2.11 1.98
Sensitive capacity kW
Input kW. 0.68 0.76 0.81 0.88 0.93 1.02
Total capacity kW 2.89 2.8
Sensitive capacity kW
Input kW. 0.65 0.78
Total capacity kW 3.03 2.98 2.92 2.83 2.69 2.46
Sensitive capacity kW
Input kW. 0.65 0.8 0.86 0.95 0.99 1.08
25ºC
1.72 1.69 1.65 1.53 1.43 1.36
1.83 1.73 1.7 1.63 1.63 1.57
1.99 1.95
2.05 1.88 1.96 1.87 1.87 1.85
30ºC
35ºC
2.61
1.81
0.82
10.4 MSC-09HRN1
SUMMER OUTDOOR TEMPERATURE DRY
Indoor Conditions
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
Total capacity kW 2.42 2.41 2.24 2.03 1.87 1.75
Sensitive capacity kW
Input kW. 0.72 0.75 0.8 0.84 0.89 0.97
Total capacity kW 0.65 2.55 2.45 2.24 2.11 1.98
Sensitive capacity kW
Input kW. 0.68 0.76 0.81 0.88 0.93 1.02
Total capacity kW 2.89 2.81
Sensitive capacity kW
Input kW. 0.65 0.78
Total capacity kW 3.03 2.98 2.92 2.83 2.69 2.46
Sensitive capacity kW
Input kW. 0.65 0.8 0.86 0.95 0.99 1.08
25ºC
1.72 1.69 1.65 1.53 1.43 1.36
1.83 1.73 1.7 1.63 1.63 1.57
1.99 1.95
2.05 1.88 1.96 1.87 1.87 1.85
30ºC
35ºC
2.61
1.81
0.82
40ºC
2.45 2.23 2.05
1.78 1.66 1.63
0.92 0.96 1.03
40ºC
2.45 2.23 2.05
1.78 1.66 1.63
0.92 0.96 1.03
45ºC
45ºC
50ºC
50ºC
WINTER OUTDOOR CONDITIONS
Indoor Conditions
15ºC
18ºC
20ºC
22ºC
28
Capacity kW
Input kW. 0.97 0.84
Capacity kW
Input kW. 0.98 0.86
Capacity kW
Input kW. 1.02
Capacity kW
12ºC D
11ºC W
3.75 3.38
3.52 3.26
3.41
3.11 2.93
7ºC D
6ºC W
3.01
0.82
4ºC D
3ºC W
3.02
0.73
2.94
0.78
2.85
2.72
0ºC D
-1ºC W
1.97 1.59 1.52
0.65 0.62 0.63
1.84 1.6 1.49
1.82 1.56 1.5
0.8 0.74 0.68 0.67
1.73 1.58 1.42
-4ºC D
-6ºC W
0.7 0.65 0.68
-7ºC D
-8ºC W
Service manual
Input kW. 1.06 0.93
0.82
0.77 0.71 0.65
10.5 MSC-12CRN1
SUMMER OUTDOOR TEMPERATURE DRY
Indoor Conditions
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
Total capacity kW 3.276
Sensitive capacity kW
25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
3.187
2.567
2.457
Input kW. 0.89 1.01 1.082
Total capacity kW 3.663
Sensitive capacity kW
Input kW. 0.915
2.918
3.503
2.766
1.033
Total capacity kW 3.86 3.7
Sensitive capacity kW
Input kW. 0.944
Total capacity kW 4.215
Sensitive capacity kW
Input kW. 0.969
3.039
2.913
1.048
4.1 3.845
3.12 2.939
1.088
3.105
2.413
3.315
2.725
1.121
3.5
2.832
1.1
2.891
1.189
2.821
2.287
1.188
3.148
2.557
1.228
3.371
2.645
1.253
3.601
2.715
1.302
2.746
2.621
2.21 2.087
1.243
3.076
2.453
1.278
3.215
2.567
1.312
3.501
2.589
1.349
1.337
2.932
2.334
1.367
3.125
2.419
1.426
3.313
2.503
1.455
10.6 MSC-12HRN1
SUMMER OUTDOOR TEMPERATURE DRY
Indoor
Conditions
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
Indoor Conditions
25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 3.276 3.187 3.105 2.821 2.746 2.621
Sensitive capacity kW
2.567 2.457 2.413 2.287 2.21 2.087
Input kW. 0.89 1.01 1.082 1.188 1.243 1.337
Total capacity kW 3.663 3.503 3.315 3.148 3.076 2.932
Sensitive capacity kW 2.918 2.766 2.725 2.557 2.453 2.334
Input kW. 0.915 1.033 1.121 1.228 1.278 1.367
Total capacity kW 3.86 3.7
Sensitive capacity kW 3.039 2.913
Input kW. 0.944 1.048
3.5
2.832
1.1
Total capacity kW 4.215 4.1 3.845 3.601 3.501 3.313
Sensitive capacity kW 3.12 2.939 2.891 2.715 2.589 2.503
Input kW. 0.969 1.088 1.189 1.302 1.349 1.455
WINTER OUTDOOR CONDITIONS
15ºC
18ºC
20ºC
Capacity kW
12ºC D
11ºC W
4.446
Input kW. 1.141 1.106
Capacity kW
4.38 4.248
Input kW. 1.188 1.153
Capacity kW
4.261
Input kW. 1.224
7ºC D
6ºC W
4.264
4.1
1.14
4ºC D
3ºC W
4.132
1.059
3.954
1.142
3.877
1.129
0ºC D
-1ºC W
3.371 3.215 3.125
2.645 2.567 2.419
1.253 1.312 1.426
3.838
1.035
3.761
1.082
3.683
1.082
-4ºC D
-6ºC W
3.335
0.895
3.258
0.953
3.189
0.976
-7ºC D
-8ºC W
3.305
0.812
2.948
0.918
2.871
0.941
29
Service manual
22ºC
Capacity kW
4.106
Input kW. 1.259 1.212
3.989
3.761
1.153
3.567
1.106
10.7 MSC-18CRN1
SUMMER OUTDOOR TEMPERATURE DRY
Indoor Conditions
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
Total capacity kW 4.914
Sensitive capacity kW
Input kW. 1.335
Total capacity kW 5.495
Sensitive capacity kW
Input kW. 1.373
Total capacity kW 5.790
Sensitive capacity kW
Input kW. 1.416
Total capacity kW 6.323
Sensitive capacity kW
Input kW. 1.454
25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
3.851
4.377
4.559
4.680
4.781
3.686
1.515
5.255
4.149
1.550
5.550
4.370
1.572
6.150
4.409
1.632
4.658
3.620
1.623
4.973
4.088
1.682
5.250
4.248
1.720
5.768
4.337
1.824
4.232
3.431
1.782
4.722
3.836
1.842
5.057
3.968
1.880
5.402
4.073
1.953
3.045
1 0.836
4.119
3.315
1.865
4.614
3.680
1.917
4.823
3.851
1.968
5.252
3.884
2.024
2.876
3.932
3.131
2.006
4.398
3.501
2.051
4.688
3.629
2.139
4.970
3.755
2.183
10.8 MSC-18HRN1
SUMMER OUTDOOR TEMPERATURE DRY
Indoor Conditions
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
WINTER OUTDOOR CONDITIONS
Indoor Conditions
15ºC
18ºC
20ºC
Total capacity kW 4.914
Sensitive capacity kW
Input kW. 1.335
Total capacity kW 5.495
Sensitive capacity kW
Input kW. 1.373
Total capacity kW 5.790
Sensitive capacity kW
Input kW. 1.416
Total capacity kW 6.323
Sensitive capacity kW
Input kW. 1.454
Capacity kW
12ºC D
11ºC W
6.669
Input kW. 1.712 1.659
Capacity kW
6.570
Input kW. 1.782 1.730
Capacity kW
6.392
Input kW. 1.836
25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
3.851
4.377
4.559
4.680
7ºC D
6ºC W
4.781
3.686
1.515
5.255
4.149
1.550
5.550
4.370
1.572
6.150
4.409
1.632
4ºC D
3ºC W
6.396
6.372
6.150
1.780
6.198
1.589
5.931
1.713
5.816
1.694
4.658
3.620
1.623
4.973
4.088
1.682
5.250
4.248
1.720
5.768
4.337
1.824
0ºC D
-1ºC W
5.757
1.553
5.642
1.623
5.525
1.623
4.232
3.431
1.782
4.722
3.836
1.842
5.057
3.968
1.880
5.402
4.073
1.953
-4ºC D
-6ºC W
5.003
1.343
4.887
1.430
4.784
1.464
4.119
3.315
1.865
4.614
3.680
1.917
4.823
3.851
1.968
5.252
3.884
2.024
-7ºC D
-8ºC W
3.932
3.131
2.006
4.398
3.501
2.051
4.688
3.629
2.139
4.970
3.755
2.183
4.958
1.218
4.422
1.377
4.307
1.412
30
Service manual
22ºC
Capacity kW
6.159
Input kW. 1.889 1.818
5.984
5.642
1.730
5.351
1.659
4.568
1.500
4.314
1.254
11. Electronic function
11.1 Proper symbols and their meaning
TA: Indoor ambient temperature
TE: Indoor evaporator temperature
TS: Setting temperature through the remote controller
I
: Self-protection amp of compressor, continue three seconds until turns off the compressor.
3sec
I
: Self-protection amp of compressor, continue five minutes until turns off the compressor.
5MIN
I
: Self-protection amp of outdoor fan/indoor fans when they change from higher wind to lower wind.
FAN
I
RESTORE
TH
TM
TL
TE1: Anti-cold wind, from Fan Off to Breeze temperature
TE2: Anti-cold wind, from Breeze to Setting Fan Speed temperature
TE3: Anti-cold wind, from Setting Fan Speed to Breeze temperature
TE4: Anti-cold wind, from Breeze to Fan Off temperature
TE5: Evaporator low temperature protection entering temperature
TE6: Evaporator low temperature protection restoring temperature
TE7: Evaporator high temperature protection, compressor off temperature
TE8: Evaporator high temperature protection, fan off temperature
TE9: Evaporator high temperature protection, restoring temperature
11.2 Function
Remote receiving
Testing and forced running
Position set for indoor unit wind vane
LED displaying and alarm
On or off Timer
Protection for the compressor
Current protection
High temperature protection of indoor heat exchanger at heating mode
Auto defrosting and heating recovery at heating mode
Anti cold air at heating mode
Anti frozen at cooling mode
11.3 Protection
11.3.1 3 minutes delay at restart for compressor.
11.3.2 Sensor protection at open circuit and breaking disconnection
11.3.3 Fan Speed is out of control. When Indoor Fan Speed is too high (higher than 2100RPM) or too
31
: Amp self-protection return value
DEFROST
DEFROST
: High wind, defrosting temperature difference
DEFROST
: Middle wind, defrosting temperature difference
: Low wind, defrosting temperature difference
low (lower than 300RPM) lasting 50 seconds, the unit stops and LED displays failure information and
can’t returns to normal operation automatically.
Service manual
11.3.4 Cross Zero signal error warning. If there is no Cross Zero signals in 4 minutes, the unit stops
and LED displays failure information and can’t returns to normal operation automatically.
11.3.5 The current protection of the compressor
If compressor turns off for continuously 4 times due to current protection in 5 minutes from Compressor On,
the unit stops and LED displays failure information and can’t returns to normal operation automatically.
11.4 Fan-only mode
Fan speed is high/mid/low/ Auto
11.5 Cooling mode
The 4-way valve is closed at cooling mode.
The action of the compressor and the outdoor fan:(T=indoor temperature)
32
Service manual
Fan
LOW
ON 6minutes
BREEZE
OFF 4minutes
LOW
ON 5minutes
BREEZE
OFF 5minutes
LOW
ON 4minutes
BREEZE
OFF 6minutes
Auto fan at cooling mode:
Anti-freezing control to indoor evaporator at cooling mode (T: evaporator temp.)
11.6 Dehumidifying mode
11.6.1 The 4-way valve is off in dehumidifying mode
11.6.2 Compressor and Indoor Fan actions in dehumidifying mode
Block
A
B
C
Repeat on and off cycle.
11.6.3 Low room temperature protection:
Indoor
Compressor and Outdoor Fan
When room temperature decreases to below 10℃, compressor and outdoor fan will stop(indoor fan is
33
Service manual
℃
Breeze). Dehumidifying operation will be resumed when room temperature restores to over 13
.
11.6.4 At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same as
that of cooling mode.
11.6.5 At dehumidifying mode, the action of fans of indoor is the same as that of air-only mode.
11.7 Heating mode
11.7.1 Generally, the 4-way valve is open in heating mode, but it is closed in defrosting mode. 4-way
valve must delay 2 minutes compared with compressor if the compressor changed into non-heating
mode or turned off. 4-way valve doesn't delay in dehumidifying mode
11.7.2 Generally, the outdoor fan is turned off with the on-off action of compressor in heating mode,
except for the defrosting mode or the end of defrost
11.7.3 Action of compressor and outdoor fan motor at heating mode: compressor must run for 7
minutes after starting and then judge temperature. Meanwhile other protections are still valid.
* This parameter can be changed from 0 to 3
11.7.4 Indoor Fan actions at heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but Anti-cold wind function
prevails.
Anti-cold wind control function at heating mode (T=indoor exchanger temp.)
11.7.5 Auto wind at heating mode (T=indoor temp.)
34
Service manual
Low fan
Room temp. down
Med fan
0
2
Room temp. up
T-Ts
11.7.6 Indoor evaporator high-temperature protection at heating mode
(T=indoor exchanger temp.)
11.7.7 The louver opens to Standard Angle ANGLHEAT when power is on for the first time.
11.8 Defrosting mode (available for heating mode)
11.8.1 Defrosting condition: Defrosting starts when either of the following ①&②:
①
A and B are satisfied:
A: The compressor keeps running for 40 minutes or more.
B: The temperature difference of evaporator and room temperature meets one of the following:
②
Calculate from the end of latest defrost, evaporator high temp. Protection only closes outdoor fan
with the compressor still running. Add up to 90 minutes.
11.8.2 Defrosting time
At condition ①, If item B is satisfied before item A, it would be regarded as severe frosting and the
defrosting time is 10 minutes. If item B is satisfied after item A, the defrosting time is 7.5minutes.
At condition
35
②
, the defrosting time is 10 minutes.
Service manual
After three times continuous 7.5-minute defrost, the fourth defrost time should be 10 minutes.
The circulation is as following:
11.8.3 Ending condition of defrosting
If one of following conditions is satisfied, end the defrost and turn into heating mode:
A. The defrost time has reached to 7.5 or 10 minutes.
B. The compressor current has reached to I
DEFROST
or above, I
differs in different models
DEROST
11.8.4 Defrosting Actions
11.9 Auto mode
11.9.1 The air conditioner automatically selects one of the following operation modes: cooling, heating
or fan only according to the temperature difference between room temperature (TA) and set
temperature (TS).
Heating (fan only at cooling only) Fan only Cooling
-1
2
11.9.2 The indoor fan blows automatically in corresponding selected mode
11.9.3 The motion of indoor fan’s blade should accord with the selected operation mode
11.9.4 One mode should be carried out for at least 15 minutes once selected. If the compressor
cannot start for 15 minutes, reselect the operation mode according to the room temp. And set temp.,
or reselect when the set temp. varies
11.10 Force cooling function
36
TA-TS
Service manual
11.10.1 Select forced cooling function with the forced cooling button or the switch
11.10.2 The compressor is unconditionally turned on, after 30 minutes cooling operation whose fan
mode is set as low, the A/C operates at the DRY mode with a set temp. of 24℃
11.10.3 All protections of remote control cooling are available at forced cooling operation
11.10.4 Forced Auto function
Select forced auto function with the forced auto button or the switch.
In forced auto status the A/C operates at remote control mode with a set temp. of 24℃.
11.11 Sleep mode
11.11.1 The sleep function is available at cooling, heating or auto mode
11.11.2 Cooling:
The set temperature rise 1℃ per hour. Two hours later, the set temperature will maintain as a constant and
the fan speed is kept at low speed.
The total time is 7 hours, after 7 hours the unit stops
11.11.3 Heating:
The set temperature decrease 1℃ per hour. Two hours later, the set temperature will maintain as a
constant and the air circulation is kept at low speed (Anti-cold function takes precedence over all).
The total time is 7 hours, after 7 hours the unit stops
11.11.4 Auto:
After an hour running under economic mode, the set temp will rise 1℃,if it is under cooling mode; the set
temp will decrease 1℃,if it is under heating mode; the set temp will be changeless, if it is under fan-only
mode; the condition will be the same after the air conditioner running under economic mode after 2 hours,
and during the next time the set temp do not change. The total time is 7 hours, after 7 hours the unit stops.
11.12 Auto restart function
In case of a sudden power failure, this function automatically sets the unit to previous settings before the
power failure when power returns
11.13 Turbo mode
In cooling mode, when pressing the turbo button on the remote controller, the unit will enter turbo mode with
ultra-high speed and reach the set temperature more quickly. After running 20 minutes in turbo mode, the
indoor fan will automatically recover the preset speed.
11.14 PLASMA ( optional):
Starts with indoor fan.
Note: Plasma and Anion can be use together
11.15 Anion( optional)
Starts with indoor fan.
Note: Plasma and Anion can be use together
37
Service manual
38
Service manual
12. Model and Parameters
Model( MSH-) 07CRN1 07HRN1 09CRN1 09HRN1 12CRN1 12HRN1 18CRN1 18HRN1
I3SEC 7.5A 7.5A 10.0A 10.0A 12.0A 12.0A 16.0A 16.0A
I5MIN 6.2A 6.2A 7.5A 7.5A 8.5A 8.5A 15.0A 15.0A
IFAN 5.2A 5.2A 5.5A 5.5A 7.5A 7.5A 9.0A 9.0A
IRESTORE 4.2A 4.2A 4.5A 4.5A 6.5A 6.5A 7.0A 7.0A
IDEFROST 3.2A 3.5A 5.0A 7.0A
TE1 28℃ 28℃ 34℃ 34℃
TE2 32℃ 32℃ 37℃ 37℃
TE3 30℃ 30℃ 33℃ 30℃
TE4 26℃ 26℃ 22℃ 20℃
TE5 4℃ 4℃ 4℃ 4℃ 3℃ 3℃ 3℃ 3℃
TE6 10℃ 10℃ 10℃ 10℃ 10℃ 10℃ 12℃ 12℃
TE7 60℃ 60℃ 63℃ 63℃
TE8 53℃ 53℃ 53℃ 53℃
TE9 50℃ 50℃ 50℃ 51℃
ANGLCOOL 200° 200° 200° 200° 155° 155° 67° 67°
ANGLHEAT 0° 0° 10° 93°
ANGLOFF 124° 124° 124° 124° 124° 124° 130° 130°
TH
TM
TL
DEFROST
DEFROST
17℃ 17℃ 20℃ 18℃
DEFROST
18℃ 18℃ 23℃ 19℃
19℃ 19℃ 26℃ 20℃
39
Service manual
This indicator il luminates when TIMER is set ON/ OFF.
Operation
lamp
Timer
lamp
Over current protection of the compressor occurs 4 times
X
Flash at 5Hz
13. Troubleshooting
13.1 Display board
Signal receptor
5
22
1
1
AU TO indicator
Thi s indicator illuminates whe n the air conditioner is in AUTO oper ation.
22
DE FROST indi cator (F or Cool ing & H eating mo dels only)
Thi s indicator illuminates whe n the air conditioner start s defros tin g automati cally or
when the warm air control fea ture is ac tiv ated in heating oper ation.
3
TEMPERATURE indicator
Displays the te mperature settings when the air condition er is oper ational.
4
OPE RATION in dicator
This indicator flashe s after power is on and illum inates when the unit is in oper ation.
TIMER indicat or
5
13.2 Troubleshooting
4
3
Failure phenomenon
Indoor fan speed has been out of control for over 1 minute
Indoor room temp. or evaporator sensor is open circuit or short circuit
EEROM error On
No over-zero signal
r Extinguish
X
On
40
Service manual
13.3 Diagnostic chart
After energizing, no indicator is lighted and the air conditioner can’t be operated.
41
Service manual
13.4 Resetting phenomenon often occurs during operation.
(That is automatically entering to the status when power is on.)
The reason is that the instantaneous voltage of main chip is less than 4.5V. Check according to the
following procedure:
13.5 Operation lamp flashes and Timer lamp off.
13.6 Operation lamp flashes and Timer lamp on.
42
Service manual
13.7 Operation lamp off and Timer lamp flashes
13.8 Operation lamp on and Timer lamp flashes
EEROM error, indoor PCB is defective.
13.9 Operation lamp flashes, Timer lamp flashes .
This is alarm signal when the main chip can’t detect over-zero signal. When such failure occurs, the main
control board must have fault.
43
Service manual
14. Characteristic of temperature sensor
Temp. Resistance KΩ Temp. Resistance KΩ Temp. Resistance KΩ
-10 62.2756 17 14.6181 44 4.3874
-9 58.7079 18 13.918 45 4.2126
-8 56.3694 19 13.2631 46 4.0459
-7 52.2438 20 12.6431 47 3.8867
-6 49.3161 21 12.0561 48 3.7348
-5 46.5725 22 11.5 49 3.5896
-4 44 23 10.9731 50 3.451
-3 41.5878 24 10.4736 51 3.3185
-2 39.8239 25 10 52 3.1918
-1 37.1988 26 9.5507 53 3.0707
0 35.2024 27 9.1245 54 2.959
1 33.3269 28 8.7198 55 2.8442
2 31.5635 29 8.3357 56 2.7382
3 29.9058 30 7.9708 57 2.6368
4 28.3459 31 7.6241 58 2.5397
5 26.8778 32 7.2946 59 2.4468
6 25.4954 33 6.9814 60 2.3577
7 24.1932 34 6.6835 61 2.2725
8 22.5662 35 6.4002 62 2.1907
9 21.8094 36 6.1306 63 2.1124
10 20.7184 37 5.8736 64 2.0373
11 19.6891 38 5.6296 65 1.9653
12 18.7177 39 5.3969 66 1.8963
13 17.8005 40 5.1752 67 1.830
14 16.9341 41 4.9639 68 1.7665
15 16.1156 42 4.7625 69 1.7055
16 15.3418 43 4.5705 70 1.6469
44
Loading...