Midea MSC-09HRDN1-QD0(E), MSC-12HRDN1-QC6(E), MSH-09HRDN1-QD0(E), MSH-12HRDN1-QC6(E) Service Manual
Page 1
SERVICE MANUAL
MIDEA AIRCONDITIONER
DC INVERTER
SPLIT WALL-MOUNTED TYPE
MSC-09HRDN1-QD0(E)
MSC-12HRDN1-QC6(E)
MSH-09HRDN1-QD0(E)
MSH-12HRDN1-QC6(E)
V1.0
Dec., 2006
Page 2
CONTENTS
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 ........................................................................................................................................................ 6
4. Specification ................................................................................................................................................ 7
5. Refrigerant cycle diagram .......................................................................................................................... 9
6. Wiring diagram ........................................................................................................................................... 10
6.1 Indoor Unit ......................................................................................................................................................... 10
6.2 Outdoor Unit ...................................................................................................................................................... 11
7. Installation details ...................................................................................................................................... 12
7.1 Wrench torque sheet for installation .................................................................................................................. 12
7.2 Connecting the cables ....................................................................................................................................... 12
7.3 Pipe length and the elevation ............................................................................................................................ 12
7.4 Air purging of the piping and indoor unit ............................................................................................................ 13
7.5 Pumping down (Re-installation) ......................................................................................................................... 14
7.6 Re-air purging (Re-installation) .......................................................................................................................... 15
7.7 Balance refrigerant of the 2-way, 3-way valves ................................................................................................. 16
7.8 Evacuation ......................................................................................................................................................... 17
7.9 Gas charging ..................................................................................................................................................... 18
8. Operation characteristics ......................................................................................................................... 19
8.1 MSC-09HRDN1-QD0(E) .................................................................................................................................... 19
8.2 MSC-12HRDN1-QC6(E) .................................................................................................................................... 20
8.3 MSH-09HRDN1-QD0(E) .................................................................................................................................... 21
8.4 MSH-12HRDN1-QC6(E) .................................................................................................................................... 22
9. Electronic function .................................................................................................................................... 23
9.1 Abbreviation ...................................................................................................................................................... 23
9.2 Display function ................................................................................................................................................. 23
9.3 Protection .......................................................................................................................................................... 24
9.4 Fan-Only Mode .................................................................................................................................................. 24
9.5 Cooling Mode .................................................................................................................................................... 25
9.6 Drying mode ...................................................................................................................................................... 27
9.7 Heating mode .................................................................................................................................................... 27
9.8 Auto mode function ............................................................................................................................................ 31
9.9 Forced operation function .................................................................................................................................. 31
9.10 Action of 4-way valve ....................................................................................................................................... 32
9.11 Two speeds outdoor fan function ..................................................................................................................... 32
9.12 Timer function .................................................................................................................................................. 32
9.13 Sleep function mode ........................................................................................................................................ 32
9.14 Electronic control parameter ............................................................................................................................ 33
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10. Troubleshooting ....................................................................................................................................... 35
10.1 Indoor Unit Error Display ................................................................................................................................. 35
10.2 Diagnosis and Solution .................................................................................................................................... 35
11. Characteristic of temp. sensor ............................................................................................................... 39
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1
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
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
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2
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.
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
When the power supply is
interrupted and then restore, the air
conditioners automatically restore
the previous function setting.
Tele Remote control (Optional)
Maintain the room temperature in accordance
w
ith the setting temperature.
The mode can be change by the room temperature.
The louver can be set at the desired position or
swing up and down automatically
The function is usually used in rainy days in
springtime or damp areas.
The fan is turn to low speed (cooling/heating).
The unit will be turn off at the seventh hour.
The unit will decide the louver direction according to
operation mode.
Turbo wind, high, med, low, breeze.
Restarting is for approx. 3 minutes..
Prevent the water being freezed on evaporator by sensing
the evaporator pipe temperature in cooling mode
Room temperature sensor.
Pipe temperature sensor.
Indoor unit
Operation by remote controller
Sensing by room temperature
Room temperature control
Anti-freezing control in cooling
Time Delay Safety control
Indoor fan speed control
Two-direction air vane
Sleep mode auto control
Independent dehumidification
Air flow Direction control
Auto mode
Temp. Compensation
Flexible wiring connection
Auto defrost
Plasma (Optional)
Anti-cold function
Self-diag. function
Auto-restart function
Work voltage (160V-253V)
Ionizer (Optional)
Prevent the cold wind at the
beginning of unit start.
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It protects the valves and prevents water from dripping.
The unit has 3 mins delay between continuously ON/OFF operations.
Outdoor unit
Power relay control
The hydrophilic fin can improve the heating efficiency at operation mode.
Hydrophilic aluminum fin
It is only operated in the heating operation mode except defrosting operation.
Anti-rust cabinet
Valve protection cover
4 way valve control
Made from electrolytic zinc steel sheet and anti-rust coated components.
Low noise air flow system
Bird tail propeller fan makes the outdoor unit run more quietly.
Discharge pipe temperature protect
Heating cable (Optional)
Driving heating at -15℃
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3. Dimension
3.1 Indoor Unit
MSC-09HRDN1-QD0(E) MSC-12HRDN1-QC6(E)
MSH-09HRDN1-QD0(E) MSH-12HRDN1-QC6(E)
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6
3.2 Outdoor Unit
MOC-09HDN1-QD0(E) MOC-12HDN1-QC6(E)
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7
4. Specification
Indoor MSC-09HRDN1-QD0(E
)
MSC-12HRDN1-QC6(E
)
Outdoor MOC-09HDN1-QD0(E) MOC-12HDN1-QC6(E)
Power supply Ph-V-Hz 1,220-240V~,50Hz 1, 220-240V~, 50Hz
Cooling
Capacity Btu/h 9000(3100~11200) 12000(3800~14700)
Input W 660(300~1100) 970(400~1480)
Rated current A 2.9(1.3~4.8) 4.3(1.8~6.5)
EER Btu/w.h, 13.6,4.0 12.4, 3.62
Heating
Capacity Btu/h 10000(3300~12300) 13000(4000~15200)
Input W 690(310~1150) 950(390~1460)
Rated current A 3.0(1.4~5.0) 4.2(1.7~6.4)
COP W/W 4.2 4
Moisture Removal L/h 0.8 1.2
Max. input consumption W 1500 1600
Max. current A 8 8.5
Starting current A 3.2 4.5
PTC Heater(optional) W 85 85
Compressor
Model DA108X1C-20FZ3 DA108X1C-20FZ3
Type Rotary Rotary
Brand TOSHIBA TOSHIBA
Capacity Btu/h 10918 10918
Input W 855 855
Rated current(RLA) A 5.3 5.3
Locked rotor Amp(LRA) A 8 8
Thermal protector CS-74 CS-74
Capacito
r
uF No No
Refrigerant oil ml 480 480
Indoor fan
motor
Model RPG20D RPG20D
Brand Welling Welling
Input W 38 38
Capacito
r
uF 1.5 1.5
Speed(hi/mi/lo) r/min 1150/1000/800 1250/1060/800
Indoor air flow (Hi/Mi/Lo) m3/h 590/470/325 615/485/325
Indoor noise level (Hi/Mi/Lo) dB(A) 41/35/30 43/37/30
Indoor unit
Dimension (W*H*D) mm 790*265*193 790*265*193
Packing (W*H*D) mm 875*375*285 875*375*285
Net/Gross weight Kg 8.5/10.5 9.0/11.0
Outdoor fan
motor
Model YDK24-6G YDK24-6G
Brand Welling Welling
Input W 59 59
Capacito
r
uF 2.5 2.5
Speed r/min 800/550 800/550
Outdoor air flow m3/h 1650/1060 1650/1060
Outdoor noise level dB(A) 52 54
Outdoor unit
Dimension(W*H*D) mm 760*590*285 760*590*285
Packing (W*H*D) mm 887*655*355 887*655*355
Net/Gross weight Kg 40.5/43 40.5/43
Refrigerant type R410A g 1230 1230
Refrigerant
piping
Liquid side/ Gas side mm(inch) Ф6.35/Ф9.53 Ф6.35/Ф12.7
Max. refrigerant pipe m 15 15
Max. difference in level m 8 8
Operation temp
℃
17 ~ 30 17 ~ 30
Ambient temp
℃
-15 ~ 50 -15 ~ 50
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Indoor MSH-09HRDN1-QD0(E
)
MSH-12HRDN1-QC6(E
)
Outdoor MOC-09HDN1-QD0(E) MOC-12HDN1-QC6(E)
Power supply Ph-V-Hz 1,220-240V~,50Hz 1, 220-240V~, 50Hz
Cooling
Capacity Btu/h 9000(3100~11200) 12000(3800~14700)
Input W 660(300~1100) 970(400~1480)
Rated current A 2.9(1.3~4.8) 4.3(1.8~6.5)
EER Btu/w.h, 13.6,4.0 12.4, 3.62
Heating
Capacity Btu/h 10000(3300~12300) 13000(4000~15200)
Input W 690(310~1150) 950(390~1460)
Rated current A 3.0(1.4~5.0) 4.2(1.7~6.4)
COP W/W 4.2 4
Moisture Removal L/h 0.8 1.2
Max. input consumption W 1500 1600
Max. current A 8 8.5
Starting current A 3.2 4.5
PTC Heater(optional) W 85 85
Compressor
Model DA108X1C-20FZ3 DA108X1C-20FZ3
Type Rotary Rotary
Brand TOSHIBA TOSHIBA
Capacity Btu/h 10918 10918
Input W 855 855
Rated current(RLA) A 5.3 5.3
Locked rotor Amp(LRA) A 8 8
Thermal protector CS-74 CS-74
Capacito
r
uF No No
Refrigerant oil ml 480 480
Indoor fan
motor
Model RPG20D RPG20D
Brand Welling Welling
Input W 38 38
Capacito
r
uF 1.5 1.5
Speed(hi/mi/lo) r/min 1150/1000/800 1250/1060/800
Indoor air flow (Hi/Mi/Lo) m3/h 650/515/375 675/520/375
Indoor noise level (Hi/Mi/Lo) dB(A) 41/35/30 43/37/30
Indoor unit
Dimension (W*H*D) mm 810*282*215 810*282*215
Packing (W*H*D) mm 915*360*290 915*360*290
Net/Gross weight Kg 9.5/11.5 9.5/11.5
Outdoor fan
motor
Model YDK24-6G YDK24-6G
Brand Welling Welling
Input W 59 59
Capacito
r
uF 2.5 2.5
Speed r/min 800/550 800/550
Outdoor air flow m3/h 1650/1060 1650/1060
Outdoor noise level dB(A) 52 54
Outdoor unit
Dimension(W*H*D) mm 760*590*285 760*590*285
Packing (W*H*D) mm 887*655*355 887*655*355
Net/Gross weight Kg 40.5/43 40.5/43
Refrigerant type R410A g 1230 1230
Refrigerant
piping
Liquid side/ Gas side mm(inch) Ф6.35/Ф9.53 Ф6.35/Ф12.7
Max. refrigerant pipe m 15 15
Max. difference in level m 8 8
Operation temp
℃
17 ~ 30 17 ~ 30
Ambient temp
℃
-15 ~ 50 -15 ~ 50
The above design and specifications are subject to change without prior notice for product improvement.
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5. Refrigerant cycle diagram
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6. Wiring diagram
6.1 Indoor Unit
MSC-09HRDN1-QD0(E) MSC-12HRDN1-QC6(E)
MSH-09HRDN1-QD0(E) MSH-12HRDN1-QC6(E)
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11
6.2 Outdoor Unit
MOC-09HDN1-QD0(E) MOC-12HDN1-QC6(E)
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7. Installation details
7.1 Wrench torque sheet for installation
Outside diameter Torque
mm inch Kg.m
Ф6.35 1/4 1.8
Ф9.52 3/8 4.2
Ф12.7 1/2 5.5
Ф15.88 5/8 6.6
Ф19.05 3/4 6.6
7.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Grade
Unit 7K 9K 12K
mm2 1.0 1.0 1.5
7.3 Pipe length and the elevation
Capacity
Btu/h
Pipe size
Standard
length
(m)
Max.
Elevation
B (m)
Max.
Elevation
B (m)
Additional
refrigerant
(g/m)
Gas
Liquid
7k~12K
3/8’’ (Ф9.52) 1/4’’ (Ф6.35) 5 5 10 30
1/2’’ (Ф12.7) 1/4’’ (Ф6.35) 5 5 10 30
18K~28K
1/2’’ (Ф12.7) 1/4’’ (Ф6.35) 5 8 15 30
5/8’’ (Ф15.88) 1/4’’ (Ф6.35) 5 10 20 30
5/8’’ (Ф15.88) 3/8’’ (Ф9.52) 5 10 20 65
Caution:
Capacity is base on standard length and maximum allowance length is base of reliability.
Oil trap should be install per 5-7 meters.
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7.4 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.
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7.5 Pumping down (Re-installation)
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.
5. Air purging of the charge hose.
Open the low-pressure valve on the charge set slightly to purge air from the charge hose.
6. Set the 2-way valve to the close position.
7. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa.
8. 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.
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.
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7.6 Re-air purging (Re-installation)
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.
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7.7 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
0.1Mpa.
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.
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7.8 Evacuation
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.
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7.9 Gas charging
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.
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8. Operation characteristics
8.1 MSC-09HRDN1-QD0(E)
Cooling Capacity(KW)
Heating Characteristics
Outdoor Ambient Temperature( )℃
2.8
2.7
2.5
2.6
2.9
3.2
3.1
2.4
3 5 7 9 11 -7 -5 -3 -1
1
0.75
0.85
0.95
1.05
0.45
0.55
0.65
Cooling Power Input(KW)
Remark: Indoor room temperature: 20℃
Indoor fan speed: High
Pipe length: 5m
Cooling Capacity(KW)
Piping Lenth Characteristics(Heating)
Piping Length (m)
2.7
2.6
2.4
2.5
2.8
2.9
3.0
10
11
12 13 14 5 6 7 8 9
0.65
0.66
0.67
0.68
0.62
0.63
0.64
Cooling Power Input(KW)
Remark: Indoor room temperature: 20℃
Outdoor temperature: 7/6℃
Indoor fan speed: High
15
2.3
Cooling Capacity(KW)
Cooling Characteristics
Outdoor Ambient Temperature( )℃
2.56
2.50
2.38
2.44
2.62
2.68
2.74
2.32
35 37 39 41 43 24 26 28 30 32
0.66
0.68
0.70
0.72
0.60
0.62
0.64
Cooling Power Input(KW)
Remark: Indoor room temperature: 27/19℃
Indoor fan speed: High
Pipe length: 5m
Cooling Capacity(KW)
Piping Lenth Characteristics(Cooling)
Piping Length (m)
2.46
2.42
2.34
2.38
2.50
2.54
2.58
2.30
10
11
12 13 14 5 6 7 8 9
0.645
0.650
0.655
0.660
0.630
0.635
0.640
Cooling Power Input(KW)
Remark: Indoor room temperature: 27/19℃
Outdoor temperature: 35℃
Indoor fan speed: High
15
Page 23
20
8.2 MSC-12HRDN1-QC6(E)
Cooling Capacity(KW)
Heating Characteristics
Outdoor Ambient Temperature( )℃
3.6
3.5
3.3
3.4
3.7
3.8
3.9
3.2
3 5 7 9 11 -7 -5 -3 -1
1
1.1
1.2
1.3
1.4
0.8
0.9
1.0
Cooling Power Input(KW)
Remark: Indoor room temperature: 20℃
Indoor fan speed: High
Pipe length: 5m
Cooling Capacity(KW)
Cooling Characteristics
Cooling Power Input(KW)
Outdoor Ambient Temperature( )℃
3.4
3.3
3.1
3.2
3.5
3.6
3.7
3.0
35 37 39 41 43 24 26 28 30 32
0.96
1.00
1.04
1.08
0.84
0.88
0.92
Remark: Indoor room temperature: 27/19℃
Indoor fan speed: High
Pipe length: 5m
Cooling Capacity(KW)
Piping Lenth Characteristics(Cooling)
Piping Length (m)
3.32
3.26
3.14
3.20
3.38
3.44
3.50
3.08
10
11
12 13 14 5 6 7 8 9
0.94
0.95
0.96
0.97
0.91
0.92
0.93
Cooling Power Input(KW)
Remark: Indoor room temperature: 27/19℃
Outdoor temperature: 35℃
Indoor fan speed: High
15
Cooling Capacity(KW)
Piping Lenth Characteristics(Heating)
Piping Length (m)
3.5
3.4
3.2
3.3
3.6
3.7
3.8
10
11
12 13 14 5 6 7 8 9
0.94
0.96
0.98
1.00
0.88
0.90
0.92
Cooling Power Input(KW)
Remark: Indoor room temperature: 20℃
Outdoor temperature: 7/6℃
Indoor fan speed: High
15
3.1
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21
8.3 MSH-09HRDN1-QD0(E)
Cooling Capacity(KW)
Cooling Power Input(KW)
Heating Characteristics
Outdoor Ambient Temperature( )℃
2.8
2.7
2.5
2.6
2.9
3.2
3.1
2.4
3 5 7 9 11 -7 -5 -3 -1
1
0.75
0.85
0.95
1.05
0.45
0.55
0.65
Remark: Indoor room temperature: 20℃
Indoor fan speed: High
Pipe length: 5m
Cooling Capacity(KW)
Piping Lenth Characteristics(Heating)
Piping Length (m)
2.7
2.6
2.4
2.5
2.8
2.9
3.0
10
11
12 13 14 5 6 7 8 9
0.65
0.66
0.67
0.68
0.62
0.63
0.64
Cooling Power Input(KW)
Remark: Indoor room temperature: 20℃
Outdoor temperature: 7/6℃
Indoor fan speed: High
15
2.3
Cooling Capacity(KW)
Cooling Power Input(KW)
Cooling Characteristics
Outdoor Ambient Temperature( )℃
2.56
2.50
2.38
2.44
2.62
2.68
2.74
2.32
35 37 39 41 43 24 26 28 30 32
0.66
0.68
0.70
0.72
0.60
0.62
0.64
Remark: Indoor room temperature: 27/19℃
Indoor fan speed: High
Pipe length: 5m
Piping Lenth Characteristics(Cooling)
Cooling Capacity(KW)
Piping Length (m)
2.52
2.48
2.40
2.44
2.56
2.60
2.64
2.36
10
11
12 13 14 5 6 7 8 9
0.645
0.650
0.655
0.660
0.630
0.635
0.640
Cooling Power Input(KW)
Remark: Indoor room temperature: 27/19℃
Outdoor temperature: 35℃
Indoor fan speed: High
15
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22
8.4 MSH-12HRDN1-QC6(E)
Cooling Capacity(KW)
Cooling Characteristics
Cooling Power Input(KW)
Outdoor Ambient Temperature( )℃
3.4
3.3
3.1
3.2
3.5
3.6
3.7
3.0
35 37 39 41 43 24 26 28 30 32
0.96
1.00
1.04
1.08
0.84
0.88
0.92
Remark: Indoor room temperature: 27/19℃
Indoor fan speed: High
Pipe length: 5m
Cooling Capacity(KW)
Piping Lenth Characteristics(Cooling)
Piping Length (m)
3.32
3.26
3.14
3.20
3.38
3.44
3.50
3.08
10
11
12 13 14 5 6 7 8 9
0.94
0.95
0.96
0.97
0.91
0.92
0.93
Cooling Power Input(KW)
Remark: Indoor room temperature: 27/19℃
Outdoor temperature: 35℃
Indoor fan speed: High
15
Cooling Capacity(KW)
Heating Characteristics
Outdoor Ambient Temperature( )℃
3.6
3.5
3.3
3.4
3.7
3.8
3.9
3.2
3 5 7 9 11 -7 -5 -3 -1
1
1.1
1.2
1.3
1.4
0.8
0.9
1.0
Cooling Power Input(KW)
Remark: Indoor room temperature: 20℃
Indoor fan speed: High
Pipe length: 5m
Cooling Capacity(KW)
Piping Lenth Characteristics(Heating)
Piping Length (m)
3.5
3.4
3.2
3.3
3.6
3.7
3.8
10
11
12 13 14 5 6 7 8 9
0.94
0.96
0.98
1.00
0.88
0.90
0.92
Cooling Power Input(KW)
Remark: Indoor room temperature: 20℃
Outdoor temperature: 7/6℃
Indoor fan speed: High
15
3.1
Page 26
23
9. Electronic function
9.1 Abbreviation
T1: Indoor ambient temperature
T2: Pipe temperature of indoor heat exchanger
T3: Pipe temperature of outdoor heat exchanger
T4: Outdoor ambient temperature
9.2 Display function
9.2.1 Icon explanation on indoor display board.
MSC-09HRDN1-QD0(E) MSC-12HRDN1-QC6(E)
MSH-09HRDN1-QD0(E) MSH-12HRDN1-QC6(E)
① Auto indication
This indicator illuminates when the air conditioner is in AUTO operation.
② Timer indicator
This indicator illuminates when TIMER is set ON/OFF.
③ PRE.-DEF. Indicator (For Cooling & Heating models only)
This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air
control feature is activated in heating mode.
④ TEMPERATURE indicator
Usually it displays the temperature settings. When change the setting temperature, this indicator begins
to flash, and stops 20 seconds later.
It displays the room temperature when the air conditioner is in FAN only operation, and the range of that
is 0~50℃. When the unit stops operation, it returns to original factory settings.
Displays the malfunction code or protection code.
⑤ Frequency indicator
This indicator appears only when the compressor is in operation and indicates the current
operating frequency.
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24
9.2.2 LED display control function.
Pressing “LED display” button on remote controller will turn off all displays on indoor unit, while pressing once
again, all displays will resume.
9.2.3 Display function in outdoor unit.
9.3 Protection
9.3.1 Three Minutes Delay at restart for compressor.
9.3.2 Temperature protection of compressor top.
9.3.3 If the temperature of compressor top is too high(higher than 115℃ and the Over-load Protector is cut, the units
stop. When the Over-load Protector restore and close(lower than 100℃), the compressor will restart( in this case
the compressor is restricted by Three Minutes Delay protection.
9.3.4 Temperature protection of compressor exhaust.
a) Initialize temperature of compressor as Tex, if 108＜Te x＜115℃, the speed of compressor will be restrict and
descend one grade every 3 minutes till 1870rpm for 9K(1829rpm for 12K), then the speed will not be changed
until Tex＜105℃. When Tex＜90℃, the restriction can be released.
b) If Tex≥115℃ for 5 seconds, the compressor will stop, and the units can not restart until Tex＜90℃.
9.3.5 Inverter module Protection, Inverter module Protection itself has a protection function against current, voltage and
temperature. If these protections happened, the the corresponding code will display on indoor unit LED.
9.3.6 Sensor protection at open circuit and breaking disconnection
9.3.7 Fan Speed is out of control. When Indoor Fan Speed is too low (lower than 300RPM for 60 seconds), the unit
stops and LED displays failure information and can’t return to normal operation automatically.
9.3.8 Cross Zero signal error warning. If there are 20 alternations of Cross Zero signals are incorrect, the unit stops and
LED displays failure information. After resuming, the motor rotates again. The spacing of Cross Zero signal is
6-13ms.
9.3.9 Indoor fan delayed open function
9.3.10 For all modes, when the units are turned on, the indoor fan can operate 10 seconds after the action of louver.
9.3.11 Compressor preheating function.compressor heating cable.
1) Preheating permitting condition:
After OPMR (Outdoor Power Main Relay) closing, if T4(outdoor ambient temperature)＜3℃ and the machine
connects to power supply newly or if T4＜3℃ and compressor has stopped for over 3 hours, the compressor
heating cable will work.
2) Preheating mode:
A weak current flows through the coil of compressor from the wiring terminal of compressor, then the
compressor is heated without operation.
3) Preheating release condition:
If T4＞5℃ or user turns on the machine and compressor runs, preheating function will stop.
9.3.12 Compressor heating cable
If outdoor temperature(sensed by outdoor thermostat) is lower than 5℃, the thermostat closes and compressor
heating cable begins to work. If outdoor temperature is higher than 15℃, the thermostat opens and compressor
heating cable stopping working.
9.4 Fan-Only Mode
9.4.1 In fan-only mode, compressor and outdoor fan keep off. For the action of 4-way valve please refer the passage
9.10
.
9.4.2 Temperature setting function is disabled, and no setting temperature display.
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25
9.4.3 In this mode, the action of louver is the same as in cooling mode.
9.4.4 The action of auto fan in fan-only mode is the same as auto fan in cooling mode with 24℃ setting temperature.
9.5 Cooling Mode
9.5.1 In this mode, for the action of 4-way valve please refer the passage 9.10.
9.5.2 The maximum starting and operation frequency decided by outdoor ambient temperature.
1) If the machine is turned on in cooling mode with controller, after start compressor runs as cooling maximum
frequency, viz. the target start frequency is Fmax, and within 7 minutes, frequency limit caused by the
difference between room temperature and setting temperature is disabled. During this period, frequency limit
and pause caused by protection is available. After this 7 minutes, the operation rule is as the third point.
2) If the machine stops and then resarts caused by protection and frequency limit or reachs setting temperature,
the start frequency is as following rule.
Temp. Zone A B C D E F G H
Start Freq. F8 F8 F7 F6 F5 F3 F1 F0
F3
T1 – 24
medium
3.5
3.0
1.5
1.0
℃
high
low
℃
3.0
2.5
3.5
2.0
1.5
1.0
0.5
-0.5
-1.0
A
B
C
D
E
F
G
H
ΔT=(room temp) – (setting Temp)
F4
F7
F8
F6
45
43
40
38
30
28
22
20
℃
Outdoor Temperature
Fmax
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26
9.5.3 After start the operation frequency of compressor submits to following rule.
1) When the machine is running and ΔT(=room temp. – setting temp.) changes, the frequency will rise or descend
a grade(maximum frequency is F8 in cooling mode, if current frequency is F1, it will not descend even ΔT is
reduced) (after 7 minutes).
2) After start, if ΔT stays in a zone for 3 minutes, the frequency will change as follow:
Zone A – E: Current frequency rise a grade(F8 is excluded) till F8.
Zone F: Keep current frequency invariable.
Zone G: Current frequency descend s grade(F1 is excluded).
Zone H: Compressor stops after running as F1 for 60 minutes or ΔT is less than -2℃.
9.5.4 Indoor heat exchanger anti-freezing function.
If T2(indoor heat exchanger temperature) gets down to be lower than 4℃, frequency will descend every one
grade for 1 minute(till F0), and this action will not stop until 4≤T2 ≤6℃. If T2 gets up to be higher than 7℃, the
limit will be released. If T2 is lower than 0℃, the compressor stops and resumes when T2>5℃.
9.5.5 Outdoor unit current control in cooling mode(refer to the parameter table)
Remark: a) The frequency descending is based on current grade, and judges if d
escending again or resuming every 2 minutes.
b) If the current descends and stays at frequency remaining zone for 3 minutes, the frequency will
rise a grade. After 3 minutes if stays at this zone still, the frequency will rise a grade again.
9.5.6 Rating capacity test function
1) Set the indoor unit with remote controller as: high fan, 17℃ in cooling mode, then press “TURBO” button on
controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine will
turn into rating capacity test mode, the buzzer will make a “di” sound for 2 seconds continuously. Also, indoor
fan will change to rating speed(RACFAN
), the frequency of compressor will be fixed as rating value(RATIFC).
Any condition of above is not satisfied, the machine can not be turned into rating capacity test mode.
2) The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting
temperature.
3) In this mode, if anti-freezing protection or start and operation frequency limit caused by general protection
occurs, compressor will not run as rating frequency any more, but indoor fan will still run as rating speed. When
the frequency limit is released, the machine will resume rating capacity test. If the machine stops caused by
protection in this test mode, after release, it can not turn back to the mode automatically again.
9.5.7 Turbo function(press the “TURBO” button on remote controller)
1) Elevate current frequency(lower than F8) to a higher grade.
2) Indoor fan turns to turbo speed.
3) In turbo mode, general protection, maximum frequency limit, anti-freezing protection for evaporator and high
temp. protection for condenser is valid.
4) After running for 30 minutes the machine will turn back to previous setting mode.
5) In non-turbo mode, press “TURBO” button on controller will switch current mode to turbo mode, if user press
this button again, the machine will turn back to previous setting mode.
I3COOL
I2COOL
I1COOL
comp. pause
freq. descends if curr. rises;
freq. remains if curr. descends
running normally
outdoor unit current
Page 30
27
6) In turbo mode, turning off the units or switching running mode will make the machine quit turbo mode.
9.5.8 Indoor fan operation rule.
1) In cooling mode, indoor fan runs all the time and the speed can be selected as high,
medium, low and auto.
2) Auto fan in cooling mode acts as follow:
9.5.9 Condenser high temperature protection function(in cooling and drying mode)
1) If T3(condenser pipe temperature) satisfies: 55＜T3＜60℃, frequency of compressor
will be limited immediately, it will descend one grade every 3 minutes till F1 and then run at this grade. If 52≤T3
＜54℃, the frequency will not descend and stay at current grade.
2) If T3＜52℃, frequency limit will be released and resume to previous grade.
3) If T3＞60℃ for 5 seconds, compressor will stop immediately, and the machine will not resume until T3＜52℃.
9.6 Drying mode
9.6.1 In this mode, for the action of 4-way valve please refer the passage 9.10.
9.6.2 Indoor fan speed is fixed at breeze grade and can’t be changed. The horizontal angle is the same as in cooling
mode.
9.6.3 Compressor action rule:
9.6.4 Room overlow temperature protection
In drying mode, if room temperature is lower than 10℃, compressor will stop and not resume until room
temperature climbs up to 12℃.
9.6.5 Evaporator anti-freezing protection, condenser high temperature protection and outdoor unit frequency limit are
valid, and they are the same as that in cooling mode.
9.6.6 Horizontal louver action is the same as that in cooling mode.
9.7 Heating mode
9.7.1 In this mode, for the action of 4-way valve please refer the passage 9.10.
9.7.2 For outdoor fan action, please refer to the passage 9.11.
9.7.3 Indoor fan action:
1) Anti-cold-wind function.
ΔT=(oom temp) – (setting Temp)
medium
4.0
3.0
1.5
1.0
℃
high
low
2.5
2.0
1.5
1.0
0.5
0.0
F3
F2
F1
F1
ΔT=(Room temp) – (Setting Temp)
℃
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28
2) If the compressor stops caused by room temperature rising, indoor fan will be forced to run 127 seconds with
breeze. During this period, anti-cold-wind is disabled. After this, anti-cold –wind function is available.
3) If the machine runs in rating capacity test mode, indoor fan runs with rating speed, and anti-cold-wind is
disabled.
9.7.4 Indoor fan speed can be set as high, medium, low or auto grade,but anti-cold-wind function is preferential.
Auto fan action in heating mode.
9.7.5 Running rule of compressor after start:
1) After start in heating mode with remote controller, compressor runs at the highest grade Fmax, and frequency
limit caused by ΔT(=room temperature – setting temperature) is disabled within initial 7 minutes, but the pause
of machine and frequency limit caused by protection is valid. After this, frequency changing rule is as the
seventh item.
2) If the machine pauses caused by protection, frequency limit or room temperature meeting setting value and
then resarts, the start frequency of compressor is set as follow and without 7 minutes limit.
9.7.6 After start the operation frequency of compressor submits to following rule:
1) If temperature(ΔTh) zone changes, frequency of compressor will rise or descend one grade, and the maximum
frequency is F10, the minimum is F1. This item is valid after the machine start and running for 7 minutes.
2) When the machine runs, if ΔTh stays in a zone for 3 minutes, action of frequency is as follow:
Zone A – E: Elevate current frequency(excluding F10) one grade, and not stop until Fmax.
Zone F: Keep current frequency invariable.
Zone G: Descend current frequency(excluding F1) one grade.
Zone H: Compressor stops after running with F1 for 60 minutes or when ΔTh＞6℃.
3) Temperature difference (ΔTcon) choice.
After power on, the machine will self-diagnose, and if there are no J1 and J2 jump wires, ΔTcon will be set as 0℃.
J1 on on off off
J2 on off on off
ΔTcon(℃)
0 -4 -2 0
ΔT=(oom temp) – (setting Temp)
medium
2.5
2.0
1.5
1.0
℃
low
high
44
38
37
34
33
TEL1
TEL0
setting fan speed
low fan
breeze
super breeze
fan stop
Evaporator temp
Page 32
29
9.7.7 Outdoor unit current control in heating mode.
1) The frequency descending is based on current grade, and judges if descending
again or resuming every 2 minutes.
2) If the current descends and stays at frequency remaining zone for 3 minutes, the
frequency will rise a grade. After 3 minutes if stays at this zone still, the frequency will rise a grade again.
9.7.8 Indoor heat exchanger high temperature protection.
1) If T2＞TEH2
℃, compressor frequency will be descended one grade every 20 seconds. When it drops to F2, if
T2 is still higher than TEH2
℃ and remains 3 minutes, the compressor will stop.
2) If T2 descends to be lower than 48℃, or remains between 48℃ to TEH2
℃ for 6 minutes, frequency limit will
be released.
3) If T2＞60℃, the compressor will stop and not resume until T2＜48℃.
9.7.9 Defrosting mode.
1) Condition of defrosting.
Condition 1. If T4＞0℃,
When the units are running, if the following two items are satisfied the units start defrosting:
a) The units runs with T3＜3℃ for 40 minutes and T3 keeps lower than TCDI
℃ for more than 3 minutes.
b) The units runs with T3＜3℃ for 80 minutes and T3 keeps lower than (TCDI
+2) ℃ for more than 3
minutes.
Remark: The above means that when T3 is lower than 3℃ PCB begins to time, if T3 is lower than start
temperature for 3 minutes, the machine starts defrosting. Here start temperature are TCDI ℃and
(TCDI
+2) ℃.
Condition 2. If T4＜0℃,
The program judges according to the condition 1, if the two items are satisfied, then judges if T2 has descended
for more than 5℃, if it has the machine starts defrosting, or continues to judge T2 and will not defrost until T2
I3HEAT
I2HEAT
I1HEAT
comp. pause
freq. descends if curr. rises;
freq. remains if curr. descends
running normally
outdoor unit current
Remark: ΔTcon can be changed among 0, -2,- 4 , the default is 0℃℃
A
ΔTh=(room temp) – (setting Temp) –ΔTcon
5.0
4.5
3.5
3.0
2.5
2.0
1.5
1.0
0.5
H
G
F
E
D
C
B
℃
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30
drops more than 5℃.
T2 initial record:
a) In anti-cold-wind control, if indoor fan is setting speed, T2 will be recorded after 5 minutes of reaching
setting temperature.
b) In anti-cold-wind control, if indoor fan is low speed, breeze or fan pause, the maximum value of T2 will
be recorded in this process.
Condition 3. No matter what value T4 is, if the machine runs with T3＜3℃ for more than 120 minutes and T3
keeps lower than (TCDI
+4) ℃ for more than 3 minutes, the machine will defrost, no matter if T2 drops for more
than 5℃ or not.
Remark: That means that no matter what condition is, only when T3＜3℃ PCB begins to time, if the machine
runs for more than 120 minutes and T3 keeps lower than start temperature(TCDI
+4) for 3 minutes, it begins to
defrost and are not restricted by T2.
2) Condition of ending defrosting.
If any one of following items is satisfied, defrosting will finish and the machine will turn to normal heating mode.
a) T3 rises to be higher than TCDE1
℃.
b) T3 rises to be higher than TCDE2
℃ and remains for 80 seconds.
c) The machine has run for 10 minutes in defrosting.
9.7.10 Defrosting action.
9.7.11 Rating capacity test function.
1) Set the indoor unit with remote controller as: high fan, 30℃ in heating mode, then press “TURBO” button on
controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine will
turn into rating capacity test mode, the buzzer will make a “di” sound for 2 seconds continuously. Also, indoor
fan will change to rating speed(RAHFAN
), the frequency of compressor will be fixed as rating value(RATIFH).
Any condition of above is not satisfied, the machine can not be turned into rating capacity test mode.
2) The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting
temperature.
3) In this mode, if indoor heat exchanger high temperature protection or start and operation frequency limit
caused by general protection occurs, compressor will not run as rating frequency any more, but indoor fan will
still run as rating speed. When the frequency limit is released, the machine will resume rating capacity test. If
on
off
on
off
on
off
on
off
compressor
4-way valve
outdoor fan
indoor fan
indoor fan breeze 10s
60s
70s
no longer than 10 minutes
30s
F8
Page 34
31
the machine stops caused by protection in this test mode, after release, it can not turn back to the mode
automatically again.
Thereinto indoor heat exchanger high temperature protection function is changed as follow:
a) If T2＞58℃, compressor frequency will be descended one grade every 20 seconds. When it drops to F2, if
T2 is still higher than 58℃ and remains 3 minutes, the compressor will stop.
b) If T2 descends to be lower than 48℃, frequency limit will be released.
c) If T2＞60℃, the compressor will stop and not resume until T2＜48℃.
9.7.12 Turbo function in heating mode. (press the “TURBO” button on remote controller)
1) Elevate current frequency(excluding F8) to a higher grade. If indoor fan is in low speed or pause caused by
defrosting or anti-cold-wind function, frequency of compressor will not be elevated one grade until these limit
has been released.
2) Indoor fan changes to turbo speed and anti-cold-wind function is valid.
3) In turbo mode, general protection, maximum frequency limit, indoor heat exchanger high temperature
protection is valid.
4) After running for 30 minutes the machine will turn back to previous setting mode.
5) In non-turbo mode, press “TURBO” button on controller will switch current mode to turbo mode, if user press
this button again, the machine will turn back to previous setting mode.
6) In turbo mode, turning off the machine or switching running mode will make the machine quit turbo mode.
9.8 Auto mode function
9.8.1 This mode can be chosen with remote controller and the setting temperature can be changed between 17~30℃.
In auto mode, the machine will choose cooling, heating or fan-only mode according to ΔT(ΔT =T1-Ts).
ΔT=T1-Ts Running mode
ΔT＞1℃
Cooling
-1≤ΔT≤1℃
Heating
ΔT＜-1℃
Fan-only
9.8.2 Indoor fan will choose auto speed of relevant mode.
9.8.3 The louver action is the same as that in relevant mode.
9.8.4 If the machine switches mode between heating and cooling, compressor will keep stopping for 15 minutes and
then rechoose mode according to ΔT.
9.8.5 If the setting temperature is modified, the machine will rechoose running function.
9.8.6 Turbo function in this mode is the same as that in relevant mode.
9.9 Forced operation function
9.9.1 Forced cooling and auto function can carry out with a touch button. In these two modes, the machine can be
changed by remote controller to any other mode at any moment.
9.9.2 When the machine is off, pressing the touch button will carry the machine to forced auto mode, after this, if
pressing the button once again within 5 seconds, the machine will turn into forced cooling mode. In forced auto,
forced cooling or any other operation mode, pressing touch button will turn off the machine. In forced operaton,
remote control is available.
9.9.3 In forced operation mode, all general protections is available.
9.9.5 In forced cooling mode, compressor frequency is fixed at F2, indoor fan is at freeze grade, anti-frozen, outdoor
unit current protection and maximum start and running frequency limit caused by outdoor temperature are valid.
After running for 30 minutes.the machine will turn to normal auto mode which setting temperature is 24℃.
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9.9.6 The action of forced auto mode is the same as normal auto mode which temperature is 24℃.
9.10 Action of 4-way valve
In heating, fan-only, standby or turning off mode, 4-way valve is off, while in cooling or drying mode 4-way valve is
on. If the machine changes operation mode from cooling or drying mode to some other mode, 4-way valve will be
delayed off 2 minutes after compressor stop. For defrosting, please refer to the passage “defrosting mode”.
9.11 Two speeds outdoor fan function
9.11.1 Outdoor fan starts at the same time with compressor, but stops 30 seconds later after compressor stop.
9.11.2 Outdoor fan action in heating mode(including heating in auto mode).
9.11.3 Outdoor fan action in cooling & drying mode(including cooling in auto & forced mode).
Please refer to the pic. above.
9.12 Timer function
9.12.1 Timing range is 24 hours, and the minimum resolution is 15 minutes.
9.12.2 Timer on. After turning off, the machine will turn on automatically when reaching the setting time.
9.12.3 Timer off. After turning on, the machine will turn off automatically when reaching the setting time.
9.12.4 Timer on/off. After turning off, the machine will turn on automatically when reaching the setting “on” time, and
then turn off automatically when reaching the setting “off” time.
9.12.5 Timer off/on. After turning on, the machine will turn off automatically when reaching the setting “off” time, and
then turn on automatically when reaching the setting “on” time.
9.12.6 The tolerance of timer is 1 minute per hour.
9.13 Sleep function mode
9.13.1 Operation time in sleep mode is 7 hours. After 7 hours the machine quits this mode and turns off.
9.13.2 In cooling, heating or auto mode sleep function is available.
9.13.3 Operation process in sleep mode is as follow:
1) After pressing ECONOMIC or SLEEP button on controller, the machine will turn into sleep mode.
2) When cooling, the setting temperature rises 1℃(be lower than 30℃) every one hour, 2 hour later the rising
stops and indoor fan is fixed as low speed.
3) When heating, the setting temperature descends 1℃(be lower than 30℃) every one hour, 2 hour later the
descending stops and indoor fan is fixed as low speed, and anti-cold-wind is available.
9.13.4 If user uses timer on function in sleep mode, sleep function will pause and not resume until reaches the setting
on time.
9.13.5 When user uses timer off function in sleep mode(or sleep function in timer off mode), if the timing time is less
than 7 hours, sleep function will be cancelled when reaching the setting time. If the timing time is more than 7
hours, the machine will not stop until reaches the setting off time in sleep mode.
Outdoor fan action in cooling & drying mode
(including cooling in auto & forced mode).
17
15
℃
outdoor temperature
low
high
outdoor fan speed
Outdoor fan action in heating mode
(including heating in auto mode).
22
20
℃
outdoor temperature
high
low
outdoor fan speed
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9.14 Electronic control parameter
N
o.
Parameter Parameter Explanation
MSC-09HRD
N1
MSC-12HRD
N1
1 RATIFC
Cooling Rating Frequency（HZ）
41 56
2 RATIFH
Heating Rating Frequency（HZ）
43 57
3 SLEEPTIMC Sleep Time(Hour) 7 7
4 FANCSHIGH Turbo Speed in Cooling (rpm) 1200 1250
5 FANHSHIGH Turbo Speed in Heating (rpm) 1300 1300
6 FANCHIGH High Fan in Cooling (rpm) 1150 1250
7 FANHHIGH High Fan in Heating (rpm) 1250 1300
8 FANMID Medium Fan(rpm) 1000 1060
9 FANLOW Low Fan(rpm) 800 800
10 FANSLOW Breeze(rpm) 700 700
11 F 1
Running Frequency（HZ）
32 31
12 F2
Running Frequency（HZ）
32 40
13 F3
Running Frequency（HZ）
35 48
14 F4
Running Frequency（HZ）
38 53
15 F5
Running Frequency（HZ）
41 59
16 F6
Running Frequency（HZ）
44 64
17 F7
Running Frequency（HZ）
55 72
18 F8
Running Frequency（HZ）
62 76
19 F9
Running Frequency（HZ）
72 79
20 F10
Running Frequency（HZ）
76 82
21 I1COOL Current of Releasing Freq. Limit in 4.5 5.2
22 I2COOL Protection Current of Freq. Limit in 5.5 6.4
23 I3COOL Protection Current of Stopping in Cooling(A) 6.5 7.5
24 I1HEAT Current of Releasing Freq. Limit in 5.2 5.2
25 I2HEAT Protection Current of Freq. Limit in 6.4 6.4
26 I3HEAT Protection Current of Stopping in Heating(A) 7.5 7.5
27 TCDI Starting Temp. of Defrosting( )℃ -6 -6
28 TCDE1 Exiting Temp. of Defrosting( )℃ 12 12
29 RACFAN Fan Speed in Cooling Capacity Test(rpm) 1300 1250
30 RAHFAN Fan Speed in Heating Capacity Test (rpm) 1300 1300
31 TEH2 Freq. Limit Starting Temp. of Evap.( )℃ 53 53
32 ANGLSTART
Reset Angle of Power On（°）
193 193
33 ANGLOFF
Closing Angle（°）
101 101
34 ANGLHEATMAX
Max. Angle in Heating（°）
11 11
35 ANGLHEAT
Standard Angle in Heating（°）
17 17
36 ANGLHEATMIN
Min. Angle in Heating（°）
51 51
37 ANGLSMALL
Standard Angle in Drying（°）（Not Available）
0 0
38 ANGLCOOLMAX
Max. Angle in Cooling（°）
180 180
39 ANGLCOOL
Standard Angle in Cooling（°）
176 176
40 ANGLCOOLMIN
Min. Angle in Cooling（°）
155 155
41 PARASUM0 Parameter Verifying
－ －
42 TCDE2 Exiting Temp. of Defrosting( )℃ 8 8
43 SUPSLOWFAN
Super Breeze Speed（rmp）
600 600
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N
o.
Parameter Parameter Explanation
MSH-09HRD
N1
MSH-12HRD
N1
1 RATIFC
Cooling Rating Frequency（HZ）
41 56
2 RATIFH
Heating Rating Frequency（HZ）
43 57
3 SLEEPTIMC Sleep Time(Hour) 7 7
4 FANCSHIGH Turbo Speed in Cooling (rpm) 1200 1250
5 FANHSHIGH Turbo Speed in Heating (rpm) 1300 1300
6 FANCHIGH High Fan in Cooling (rpm) 1150 1250
7 FANHHIGH High Fan in Heating (rpm) 1250 1300
8 FANMID Medium Fan(rpm) 1000 1060
9 FANLOW Low Fan(rpm) 800 800
10 FANSLOW Breeze(rpm) 700 700
11 F 1
Running Frequency（HZ）
32 31
12 F2
Running Frequency（HZ）
32 40
13 F3
Running Frequency（HZ）
35 48
14 F4
Running Frequency（HZ）
38 53
15 F5
Running Frequency（HZ）
41 59
16 F6
Running Frequency（HZ）
44 64
17 F7
Running Frequency（HZ）
55 72
18 F8
Running Frequency（HZ）
62 76
19 F9
Running Frequency（HZ）
72 79
20 F10
Running Frequency（HZ）
76 82
21 I1COOL Current of Releasing Freq. Limit in 4.5 5.2
22 I2COOL Protection Current of Freq. Limit in 5.5 6.4
23 I3COOL Protection Current of Stopping in Cooling(A) 6.5 7.5
24 I1HEAT Current of Releasing Freq. Limit in 5.2 5.2
25 I2HEAT Protection Current of Freq. Limit in 6.4 6.4
26 I3HEAT Protection Current of Stopping in Heating(A) 7.5 7.5
27 TCDI Starting Temp. of Defrosting( )℃ -6 -6
28 TCDE1 Exiting Temp. of Defrosting( )℃ 12 12
29 RACFAN Fan Speed in Cooling Capacity Test(rpm) 1200 1250
30 RAHFAN Fan Speed in Heating Capacity Test (rpm) 1300 1300
31 TEH2 Freq. Limit Starting Temp. of Evap.( )℃ 53 53
32 ANGLSTART
Reset Angle of Power On（°）
200 200
33 ANGLOFF
Closing Angle（°）
125 125
34 ANGLHEATMAX
Max. Angle in Heating（°）
26 26
35 ANGLHEAT
Standard Angle in Heating（°）
40 40
36 ANGLHEATMIN
Min. Angle in Heating（°）
53 53
37 ANGLSMALL
Standard Angle in Drying（°）（Not Available）
0 0
38 ANGLCOOLMAX
Max. Angle in Cooling（°）
195 195
39 ANGLCOOL
Standard Angle in Cooling（°）
180 180
40 ANGLCOOLMIN
Min. Angle in Cooling（°）
168 168
41 PARASUM0 Parameter Verifying
－ －
42 TCDE2 Exiting Temp. of Defrosting( )℃ 8 8
43 SUPSLOWFAN
Super Breeze Speed（rmp）
600 600
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10. Troubleshooting
10.1 Indoor Unit Error Display
Display LED STATUS
E0 EEPROM parameter error
E1 Indoor / outdoor units communication protection
E2 Zero-crossing signal error
E3 Fan speed out of control
E5 Open or short circuit of outdoor temperature sensor
E6 Open or short circuit of room or evaporator temperature sensor
P0 IGBT over-strong current protection
P1 Over voltage or too low voltage protection
P2 Temperature protection of compressor top.
P4 Inverter compressor drive error
Note: E4 & P3: Reserved function
10.2 Diagnosis and Solution
10.2.1 E0(EEPROM parameter error) error diagnosis and solution
10.2.2 E1(indoor / outdoor units communication protection) error diagnosis and solution
Circuit or software error on indoor PCB
Replace indoor PCB
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10.2.3 E2(zero-crossing signal error) diagnosis and solution
10.2.4 E3(indoor fan speed out of control) diagnosis and solution
Disconnect the power supply, after 1 minute,
connect the power supply , turn on the unit with
remote controller
Does the unit work
normally ?
Check the wiring between
inoor and outdoor unit. Is the
connection of L, N, S and
GND good?
Is the GND connection on
outdoor PCB good?
NO
NO
Reconnect and retest again
Is the LED4(red) on
outdoor PCB bright and
LED1(yellow) blinking?
Replace outdoor e-box.
Ye s
Ye s
The power supply for
outdoor PCB is fail. Check
the wiring on outdoor PCB
comparing with wiring plate.
Is the connection good?
No
Correct the connection.
Ye s
No
Replace indoor PCB
and repower on. Is
the failure cleared?
Is power supply and
connection of connectors
good?
Indoor PCB is defective. Replace
the indoor PCB.
Be sure the power supply is good
and correct the connection
NO
YES
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10.2.5 E5(Open or short circuit of outdoor temperature sensor) diagnosis and solution.
10.2.6 E6(open or short circuit of room or evaporator temperature sensor) diagnosis and solution.
10.2.7 P0(IGBT over-strong current protection) diagnosis and solution.
Is all connections on PCB
and between PCB and
compressor good?
Repair or correct the
connector or connection.
Replace the outdoor PCB
and then repower on. Is
the failure cleared?
NO
YES
Check the compressor
NO
Is the indoor temperature
and evaporator sensor
connector and connection
good?
Repair the connector and
reconnect
Replace the sensor and
check if E6 display again?
NO
YES
Replace the.indoor PCB
YES
Is the outdoor temperature
sensor connector and
connection good?
Repair the connector and
reconnect
Replace the sensor and
check if E5 display again?
NO
YES
Replace outdoor e-box
YES
Is the indoor fan motor
connector and connection
good?
Repair the connector and
reconnect
Is voltage being applied to
the fan motor?
(rang 90v-160v between
mid pin and N on CN1
NO
YES
Indoor PCB is defective.
Replace the indoor PCB.
YES
Replace the indoor fan
motor
NO
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38
10.2.8 P1(over voltage or too low voltage protection) diagnosis and solution.
10.2.9 P2(temperature protection of compressor top) diagnosis and solution.
10.2.10 P4(inverter compressor drive error) diagnosis and solution.
Is the connection of
compressor good? Is the
wiring sequency right? The
Replace the outdoor E-box.
If the problem comes to
again, check coil resistance
of inverter compressor, is it
YES
Replace inverter compressor
Reconnect and retry
NO
NO
Is the power supply good?
Be sure the power supply is
normal when using the units
NO
YES
Replace the outdoor e-box.
YES
Does compressor
o
p
erate?
Is the connection
good?
Is refrigerant
circulation
volume normal?
NO
NO
Charge refrigerant
Is abnormality
the same after
gas charging?
NO
Check refrigerant system
(such as clogging of capillary,
Reconnect and retest.
NO
YES
Is protector
normal?
Replace the protector.
NO
YES
Check the outdoor
main PCB. Is there
some problem?
Replace the outdoor PCB.
YES
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11. Characteristic of temp. 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
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