Page 1
Cover
MSV1-09HRDN1
MSV1-12HRDN1
Page 2
Content
2
Content
1. Precaution .......................................................................................................................... 1
1.1 Safety Precaution .............................................................................................................................. 1
1.2 Warning ............................................................................................................................................. 1
2. Function.............................................................................................................................. 3
3. Dimension........................................................................................................................... 5
3.1 Indoor unit（Vertu） .......................................................................................................................... 5
3.2 Outdoor unit（Vertu） ....................................................................................................................... 5
4. Specification....................................................................................................................... 6
5. Refrigerant cycle diagram................................................................................................. 7
6. Operation limits.................................................................................................................. 8
6.1 Cooling operation............................................................................................................................... 8
6.2 Heating operation .............................................................................................................................. 8
7. Schematic diagram and Wiring diagram.......................................................................... 9
7.1. Schematic diagram ............................................................................................................................ 9
7.2. Wiring diagram ................................................................................................................................13
8. Installation details............................................................................................................ 14
8.1 Wrench torque sheet for installation ................................................................................................ 14
8.2 Connecting the cables ..................................................................................................................... 14
8.3 Pipe length and the elevation .......................................................................................................... 14
8.4 Air purging of the piping and indoor unit .......................................................................................... 15
8.5 Pumping down (Re-installation) ....................................................................................................... 16
8.6 Re-air purging (Re-installation) ........................................................................................................ 17
8.7 Balance refrigerant of the 2-way, 3-way valves................................................................................ 18
8.8 Evacuation ....................................................................................................................................... 19
8.9 Gas charging ................................................................................................................................... 20
9. Pressure table .................................................................................................................. 21
9.1 MSV1-09HRDN1 ............................................................................................................................. 21
9.2 MSV1-12HRDN1 ............................................................................................................................. 21
10. Capacity table................................................................................................................... 22
10.1 MSV1-09HRDN1 ............................................................................................................................. 22
10.2 MSV1-12HRDN1 ............................................................................................................................. 22
11. Electronic function........................................................................................................... 24
11.1 . Display board................................................................................................................................... 24
11.2 . Protection ........................................................................................................................................ 25
11.3 . Fan-only mode................................................................................................................................. 25
11.4 . Cooling mode .................................................................................................................................. 25
11.5 . Dehumidifying mode ........................................................................................................................ 26
11.6 . Heating mode .................................................................................................................................. 26
11.7 . Defrosting operation (Available for heating only). ............................................................................ 27
11.8 . Outdoor low temperature protection (optional) ................................................................................ 28
11.9 . Automatic operation mode............................................................................................................... 28
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Content
3
11.10. Manual switch.................................................................................................................................. 28
11.11 . Timer Function ................................................................................................................................. 28
11.12. Sleep mode ..................................................................................................................................... 28
11.13. Auto restart function......................................................................................................................... 29
11.14. Turbo function.................................................................................................................................. 29
12. Model and Parameters..................................................................................................... 30
13. Troubleshooting............................................................................................................... 31
13.1 Indoor Unit Error Display ................................................................................................................. 31
13.2 Diagnostic chart ............................................................................................................................... 36
13.3 Resetting phenomenon often occurs during operation .................................................................... 38
13.4 Operation lamp flashes and Timer lamp off ..................................................................................... 38
13.5 Operation lamp flashes and Timer lamp on ..................................................................................... 38
13.6 Operation lamp off and Timer lamp flashes ..................................................................................... 39
13.7 Operation lamp on and Timer lamp flashes ..................................................................................... 39
13.8 Operation lamp flashes, Timer lamp flashes.................................................................................... 39
14 Characteristic of temperature sensor ............................................................................ 40
Page 4
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Service manual
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
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
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.
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Service manual
2
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 st ep 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.
Page 7
Service manual
2. Function
Indoor unit
3
Operation ON/OFF by remote controller
Room temperature sensor.
Pipe temperature sensor.
Sensing by room temperature
Maintain the room temperature in accordance with the setting temperature.
Room temperature control
Prevent the water being freezed on evaporator by sensing
the evaporator pipe temperature in cooling mode
Anti-freezing control in cooling
Work voltage (160v-253v)
Restarting is for approx. 3 minutes..
Time Delay Safety control
Turbo wind, high, med, low, breeze.
Indoor fan speed control
The unit will decide the louver direction according to operation mode.
Two-direction air vane
The fan is turn to low speed (cooling/heating).
The unit will be turn off at the seventh hour.
Sleep mode auto control
The function is usually used in rainy days in
springtime or damp areas.
Independent dehumidification
The louver can be set at the desired position or
swing up and down automatically
Air flow Direction control
The mode can be change by the room temperature.
Auto mode
DSP High-speed Chip
Flexible wiring connection
Auto defrost
Temp. Compensation
The function will be operated
in any operation mode.
Plasma (Optional)
Prevent the cold wind at the
beginning of unit start.
Anti-cold function
Self-diag. function
Auto-restart function
When the power supply is interrupted and
then restore, the air conditioners automaticall
y
restore the previous function setting.
Tele Remote control (Optional)
Driving heating at -15℃
High efficiency (30%)
Page 8
Service manual
Outdoor unit
4
The unit has 3 mins delay between continuouslyON/OFF operations.
Power relay control
Low noise air flow system
Bird tail propeller fan makes the outdoor unit run more quietly.
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.
It protects the valves and prevents water from dripping.
Discharge pipe temperature protect
Page 9
Service manual
3. Dimension
3.1 Indoor unit（Vertu）
Dimension
W H D
5
Mode
9K 795 270 165
12K 845 286 165
3.2 Outdoor unit（Vertu）
Dimension
W H D
Mode
9K 760 590 285
12K 760 590 285
Page 10
Service manual
4. Specification
MSV1-09HRDN1 MSV1-12HRDN1
Ph-V-Hz 1,220-240V~,50Hz 1, 220-240V~, 50Hz
Capacity Btu/h 9000(3500-11000) 12000(4400-14500)
Input W 810(260-1350) 1090(520-1600)
Rated current A 3.3(1.5-7.0 ) 5.1(2.7~8.5)
EER Btu/w.h, w/w 11.1,3.26 11.0, 3.21
Capacity Btu/h 10000(3500-13800) 14000(4800-20500)
Input W 810(330-1550) 1130(520-2050)
Rated current A 3.5(1.4-7.5) 5.2(2.7-10.0)
COP W/W 3.62 3.63
L/h 0.86 1.2
W 1900 2550
A10 12
A3.3 4.1
Model DA89X1C-23FZ DA89X1C-23FZ
Type R ota ry Ro tary
Brand TOSHIBA TOSHIBA
Capacity Btu/h 9040 9040
Input W 680 680
Rated current(RLA) A 4.7 4.7
Locked rotor Amp(LRA) A 10 10
Thermal protector CS-74 CS-74
Capa citor uF No No
Refrigerant oil ml 370 370
Mode l R PG20D R PG20D
Brand Welling Welling
Input W 51.5 51.5
Capa citor uF 1.5 1.5
Speed(hi/mi/lo) r/min 1150/1000/850 1250/1050/900
m3/h 570/480/350 700/520/420
dB(A) 40/34/29 42/35/29
Model YDK24-6F YDK24-6F
Brand Welling Welling
Input W 56 56
Capa citor uF 2.5 2.5
Speed r/min 800 800
m3/h 1700 1900
dB(A) 53 56
g 980 1150
MPa 4 .2 4.2
Liquid side/ Gas s ide mm(inch) Ф6.35/Ф9.53 Ф6.35/Ф12.7
Max. refrigerant pipe leng m 12 12
Max. difference in level m 5 5
℃
17 - 30 17 -30
℃
-15 -50 -15 -50
m2 14-21 18-26
Application area
Design p ressure
Refrigerant piping
Operation temp
Ambie nt te m p
Outdoor fan motor
Outdoor air flo w
Outd oo r noise level
Refrigera nt type R410A
Compressor
Indoor fan m otor
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Mois ture Rem oval
Max. input consumption
Max. current
Startin g current
Model
Power supply
Cooling
Heating
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are normally
somewhat different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product improvement.
6
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Service manual
5. Refrigerant cycle diagram
7
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Service manual
6. Operation limits
6.1 Cooling operation
Outdoor unit air temp.℃ DB
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.
8
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Service manual
7. Schematic diagram and Wiring diagram
7.1. Schematic diagram
7.1.1 Display board
9
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Service manual
7.1..2 Indoor main PCB
10
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Service manual
7.1.3 Outdoor main PCB
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Service manual
7.1.4 Outdoor power PCB
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Service manual
7.2. Wiring diagram
7.2.1 MSV1-09HRDN1, MSV1-12HRDN1
13
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Service manual
8. Installation details
8.1 Wrench torque sheet for installation
Outside diameter Torque
mm inch Kg.m
φ6.35
1/4 1.8
φ9.52
3/8 4.2
φ12.7
1/2 5.5
φ15.88
5/8 6.6
φ19.05
3/4 6.6
8.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Grade
Unit 7K 9K 12K
mm21.0 1.0 1.5
8.3 Pipe length and the elevation
14
Pipe size
Capacity
Btu/h
GAS LIQUID
Standard
length
Max. Max. Additional
Elevation Elevation refrigerant
(m) B (m) B (m) (g/m)
3/8’’ (φ9.52) 1/4’’ (φ6.35)
5 5 10 30
7k~12K
1/2’’ (φ12.7) 1/4’’ (φ6.35)
5 5 10 30
1/2’’ (φ12.7) 1/4’’ (φ6.35)
5 8 15 30
5/8’’ (φ15.88) 1/4’’ (φ6.35)
5 10 20 30
18K~28K
5/8’’ (φ15.88) 3/8’’ (φ9.52)
5 10 20 65
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.
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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.
6. Set the 3-way valve to the opened
position.
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.
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.
Be sure to use a hexagonal wrench to operate
the valve stem
3. Check for gas leakage.
Check the flare connection for gas leakage
Caution:
4. Purge the air from the system.
If gas leakage is discovered in step (3) above,
take the following measures.
Set the 2-way valve to the open position and
remove the cap from the 3-way valve’s
service port.
If the leaks stop when the piping connections are
tightened further, continue working from step (4).
Using the hexagonal wrench to press the
valve core pin, discharge for three seconds
and then wait for one minute.
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.
5. Use torque wrench to tighten the service
port cap to a torque of 1.8 kg.m. (18n.m)
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Service manual
8.5 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.
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.
16
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Service manual
8.6 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.
17
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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.
18
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Service manual
8.8 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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Service manual
8.9 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.
20
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Service manual
21
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 MSV1-09HRDN1
Cooling mode Outdoor temperature (Dry bulb temp)
Indoor Conditions Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
21ºC D15ºC W Pressure( kg/cm2 ) 8.7 8.9 8.9 9.0 10.0 10.6
24ºC D17ºC W Pressure( kg/cm2 ) 8.8 8.9 8.9 9.6 10.5 11.0
27ºC D19ºC W Pressure( kg/cm2 ) 8.8 8.9 9.0 9.0 11.0 11.5
32ºC D23ºC W Pressure( kg/cm2 ) 8.9 9.0 9.1 10.1 12.0 12.5
Heating mode OUTDOOR CONDITIONS
Indoor Conditions 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
15ºC Pressure( kg/cm2 ) 34.0 33.5 32.0 31.0 28.0 27.0
18ºC Pressure( kg/cm2 ) 35.0 34.5 34.0 32.5 29.0 27.5
20ºC Pressure( kg/cm2 ) 36.5 36.0 35.5 33.5 30.0 28.5
22ºC Pressure( kg/cm2 ) 37.0 36.5 36.0 35.0 31.5 29.0
9.2 MSV1-12HRDN1
Cooling mode Outdoor temperature (Dry bulb temp)
Indoor Conditions Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
21ºC D15ºC W Pressure( kg/cm2 ) 6.4 6.6 6.8 7.2 7.6 8.1
24ºC D17ºC W Pressure( kg/cm2 ) 6.6 6.9 7.0 7.6 8.2 8.7
27ºC D19ºC W Pressure( kg/cm2 ) 6.9 7.0 7.3 7.6 8.6 9.2
32ºC D23ºC W Pressure( kg/cm2 ) 6.9 7.4 7.6 8.1 9.4 9.8
Heating mode OUTDOOR CONDITIONS
Indoor Conditions Pressure
12ºC D 7ºC D 0ºC D -4ºC D -7ºC D -15ºC D
15ºC Pressure( kg/cm2 ) 36.0 35..0 34.5 30.0 29.0 28.0
18ºC Pressure( kg/cm2 ) 33.0 34.0 33.5 30.0 28.5 27.5
20ºC Pressure( kg/cm2 ) 34.0 33.0 31.0 30.5 29.0 26.0
22ºC Pressure( kg/cm2) 32.5 31.5 31.0 29.0 28.0 25.5
Page 26
Service manual
22
10. Capacity table
10.1 MSV1-09HRDN1
COOLING OUTDOOR TEMPERATURE DRY
Indoor Conditions 21ºC 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 2.87 3.00 2.60 2.34 1.98 1.70 1.53
Sensitive capacity kW 1.84 1.91 2.03 1.99 1.65 1.46 1.32
21ºC D
15ºC W
Input kW. 0.701 0.72 0.80 0.86 0.89 0.98 1.16
Total capacity kW 2.98 3.15 2.85 2.45 2.30 1.95 1.74
Sensitive capacity kW 1.84 2.01 2.23 2.11 1.93 1.72 1.50
24ºC D
17ºC W
Input kW. 0.72 0.73 0.82 0.90 0.92 1.01 1.17
Total capacity kW 3.13 3.20 2.98 2.58 2.60 2.34 2.03
Sensitive capacity kW 2.04 2.15 2.30 1.96 2.23 2.09 1.73
27ºC D
19ºC W
Input kW. 0.75 0.78 0.85
0.76 0.96 1.04 1.19
Total capacity kW 3.29 3.33 3.12 3.05 2.80 2.62 2.32
Sensitive capacity kW 2.17 2.15 2.43 2.56 2.38 2.33 2.05
32ºC D
23ºC W
Input kW. 0.78 0.80 0.86 1.00 1.01 1.08 1.23
HEATING OUTDOOR CONDITIONS
Indoor Conditions
24ºC D
18ºCW
12ºC D
11ºCW
7ºC D
6ºC W
4ºC D
3ºCW
0ºC D
-1ºCW
-5ºC D
-6ºC W
-7ºCD
-8ºC W
-15ºC D
-16ºC W
Capacity kW 3.5 4.11 4.10 3.80 3.49 3.12 3.01 1.72
15ºC
Input kW. 0.958 1.53 1.57 1.56 1.51 1.39 1.37 1.30
Capacity kW 3.45 4.10 4.05 3.70 3.48 3.11 2.99 1.70
18ºC
Input kW. 0.96 1.55 1.58 1.60 1.52 1.40 1.38 1.32
Capacity kW 3.44 4.05 2.87 3.69 3.47 3.00 2.86 1.69
20ºC
Input kW. 0.965 1.60 0.79 1.63 1.54 1.42 1.40 1.35
Capacity kW 3.435 4.00 3.932 3.65 3.47 2.97 2.81 1.68
22ºC
Input kW. 0.98 1.65
1.64 1.67 1.58 1.45 1.43 1.38
Capacity kW 3.4 3.95 3.85 3.60 3.43 2.89 2.79 1.67
27ºC
Input kW. 0.99 1.69 1.69 1.70 1.61 1.50 1.48 1.40
10.2 MSV1-12HRDN1
COOLING OUTDOOR TEMPERATURE DRY
Indoor
Conditions
21ºC 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 3.187 3.48 3.30 3.01 2.81 2.38 2.16
Sensitive capacity kW 2.23 2.40 2.38 2.28 2.25 2.10 1.90
21ºC D
15ºC W
Input kW. 0.924 1.08 1.18 1.30 1.39 1.45 1.59
Total capacity kW 3.579 3.76 3.65 3.43 2.98 2.70 2.44
Sensitive capacity kW 2.505 2.61 2.66 2.61 2.41 2.35 2.20
24ºC D
17ºC W
Input kW. 0.957 1.10 1.19 1.33 1.41 1.49 1.61
Total capacity kW 3.879 4.09 3.90 3.50 3.19 2.99 2.79
Sensitive capacity kW 2.792 2.86 2.89 2.80 2.58 2.60 2.45
27ºC D
19ºC W
Input kW. 0.979 1.11 1.20
1.07 1.45 1.51 1.60
Total capacity kW 4.087 4.32 4.02 3.80 3.62 3.40 3.28
Sensitive capacity kW 3.168 3.80 3.01 3.07 3.11 2.96 2.89
32ºC D
23ºC W
Input kW. 0.989 1.12 1.25 1.40 1.48 1.55 1.68
Page 27
Service manual
23
HEATING OUTDOOR CONDITIONS
Indoor
Conditions
24ºC D
18ºC
W
12ºC D
11ºC
W
7ºC D
6ºC
W
4ºC D
3ºC
W
0ºC D
-1ºC
W
-5ºC D
-6ºC
W
-7ºC D
-8ºC
W
-15ºC D
-16ºC
W
Capacity kW 4.875 6.15 5.72 5.13 4.52 4.21 3.75 3.41
15ºC
Input kW. 1.568 2.07 2.20 2.09 2.01 1.99 1.80 1.76
Capacity kW 4.801 6.09 5.58 5.02 4.39 4.10 3.59 3.27
18ºC
Input kW. 1.6 2.18 2.39 2.20 2.16 2.09 1.83 1.81
Capacity kW 4.684 5.89 4.03 4.90 4.21 3.89 3.37 3.11
20ºC
Input kW. 1.658 2.21
1.11 2.35 2.27 2.15 1.99 1.92
Capacity kW 4.521 5.58 5.39 4.71 4.10 3.70 3.17 2.99
22ºC
Input kW. 1.729 2.28
2.45 2.41 2.40 2.25 2.11 2.00
Capacity kW 4.387 5.37 4.99 4.48 3.90 3.49 3.01 2.71
27ºC
Input kW. 1.804 2.39 2.61 2.55 2.51 2.38 2.27 2.13
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Service manual
11. Electronic function
11.1. Display board
11.1.1. OPERATION indicator
This indicator flashes after power is on and illuminates when the unit is in operation.
11.1.2. AUTO indicator
This indicator illuminates when the air conditioner is in AUTO operation.
11.1.3. TIMER indicator
This indicator illuminates when TIMER is set ON/OFF.
11.1.4. CLEAN AIR indication lamp
Lights up when CLEAN AIR feature is activated and Ionizer can generate abundant anions to fill the
room with refreshing and natural air.
11.1.5. 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.
11.1.6. TURBO indication lamp
Lights up when select TURBO function on cooling operation or on heating operation.
11.1.7. FREQUENCY indicator
This indicator appears only when the compressor is in operation and indicates the current operating
frequency.
11.1.8. 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.
When the unit stops operation, it returns to original factory settings.
Displays the malfunction code or protection code.
11.1.9. FAN SPEED indication lamp
Displays the selected fan speed: AUTO(nothing) and three fan speed levels: LOW, MED and HIGH.
24
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25
11.2. Protection
11.2.1. 3 minutes delay at restart for compressor.
11.2.2. Temperature protection of compressor top, compressor stops when the temp. of top of
compressor is more than 115℃, compressor runs when the temp. of top of compressor is less than
100℃.
11.2.3. Voltage protection, unit stop when the voltage is more than 260V and less than 175V.
11.2.4. Inverter module Protection, Inverter module Protection itself has a protection function against
current, voltage and temperature.
11.2.5. Sensor protection at open circuit and breaking disconnection
11.2.6. Fan Speed is out of control. When Indoor Fan Speed is too high (higher than 2100RPM) or too
low (lower than 300RPM), the unit stops and LED displays failure information and can’t return to
normal operation automatically.
11.2.7. 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 return to normal operation automatically.
11.3. Fan-only mode
Fan speed is high/mid/low/ Auto
11.4. Cooling mode
11.4.1. The 4-way valve is closed at cooling mode.
11.4.2. The action of the compressor and the outdoor fan:
Condition
T=Indoor Temp.
Compressor Outdoor fan
T> Ts+1 On On Room temp. up
T<Ts+1 Off Off
T> Ts On On Room temp. down
T<Ts Off Off
11.4.3 Auto fan at cooling mode:
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
T<1.5℃ Low
1.5℃<T<4℃ Mid.
Room temp. up
T>4℃ High
T> 3℃ High
1℃<T<3℃ Mid.
Room temp. down
T<1℃ Low
11.4.4 Anti-freezing control to indoor evaporator at cooling mode( T: evaporator temp. )
Evaporator Temp. Compressor
0℃<T< 4℃ Decrease frequency of compressor
T< 0℃ Off
11.4.5 Current protection
Model Current Compressor
I>18 A Off
14.5A<I<18A Decrease frequency of
compressor
Current up MSH-18HRIN1
I< 12.0A On
I>17.5 A Off
14.0A<I<17.5A Decrease frequency of
compressor
Current down MSH-18HRIN1
I< 11.5A On
11.4.6 Rated capacity test
Set mode to cooling mode
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26
Set temp. to 17°C
Set fan speed to high speed
Push turbo button 5 times in 10 seconds.
Using special remoter controller
After 5 hours, cancel rated capacity test
Turbo function
Increasing frequency of compressor
After operating 30 minutes, return automatically to the mode and temp. previously selected.
11.5. Dehumidifying mode
11.5.1 The 4-way valve is off
11.5.2 The indoor fan is fixed in breeze speed
11.5.3 Compressor run in low frequency
11.5.4 Low room temperature protection:
11.5.5 When room temperature decreases to below 10℃, compressor and outdoor fan will stop(indoor
fan is Breeze). Dehumidifying operation will be resumed when room temperature restores to over
12℃.
11.5.6 At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same as
that of cooling mode.
11.6. Heating mode
11.6.1. Generally, the 4-way valve is open at heating mode, but it is closed at defrosting. 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.
11.6.2. 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.
11.6.3. 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.
Condition Compressor Outdoor fan
T> Ts+3 Off Off Room temp. up
T<Ts+3 On On
T< Ts+2 On On Room temp. down
T>Ts+2 Off Off
11.6.4. 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
Condition （T= Indoor exchanger temp.）
Indoor fan speed
T<34℃ Off
34℃<T<37℃ Breeze
37℃<T<44℃ Low speed
Indoor exchanger temp. up
T>44℃ Setting fan speed
T> 38℃ Setting fan speed
33℃<T<38℃ Low sped
24℃<T<33℃ Breeze
Indoor exchanger temp. down
T<24℃ Off
When the indoor temp. gets to setting temp, indoor changes to breeze speed immediately, after 127
second, indoor fan stop.
11.6.5. Auto wind at heating mode
Condition (T=Indoor Temp.-Setting Temp.) Indoor fan speed
T<1.5℃ High
1.5℃<T<2.5℃ Med.
Room temp. up
T>2.5℃ Low
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27
T<1.0℃ High Room temp. down
1.0℃<T<2.0℃ Med.
T>2.0℃ Low
11.6.6. Indoor evaporator high-temperature protection at heating mode
Condition (T= Indoor exchanger temp.) Compressor
T<48℃ On
53℃<T<63℃ Decrease frequency of compressor
T>63℃ Off
11.6.7. The current protection
Model Current Compressor
I>19.0 A Off Current up 18000btu/h
15.0.A<I<19.0A Decrease frequency of compressor
I< 12.5A On
I>18.5 A Off
14.5A<I<18.5A Decrease frequency of compressor
Current down 18000btu/h
I< 12.0A On
11.6.8. The temp. compensation
Jump setting in indoor PCB
J2 On On Off Off
J3 On Off On Off
0℃ -4℃ -2℃ 0℃
ΔT
11.7. Defrosting operation (Available for heating only).
11.7.1 Defrosting condition:
11.7.1.1. When outdoor temp. is more than 0℃,
Defrosting starts when meeting one of the following conditions,
a. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 40 minutes, and the temperature remains consecutively -4°c for more than 3 minutes,
b. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 80 minutes, and the temperature remains consecutively -2°c for more than 3 minutes
11.7.1.2. When outdoor temp. is less than 0℃,
Defrosting starts when meeting one of the following conditions,
a. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 40 minutes, and the temperature remains consecutively -6°c for more than 3 minutes,
b. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 40 minutes, and the temperature remains consecutively -6°c for more than 3 minutes,
c. The temperature of indoor unit pipe decreases 5°c than before
11.7.1.3. The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more
than 120 minutes, and the temperature remains consecutively -2°c for more than 3 minutes
11.7.2 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 10 minutes.
b. When the temperature of outdoor heat exchanger rises up to 8°C and this continues for more than 80
seconds.
c. When the temperature of outdoor heat exchanger rises up to 12°C
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Service manual
11.7.3 Defrosting Actions:
max. 10 minutes
60s
ON 10s 30s
Com. OFF
ON ON
4 way valve OFF
ON ON
Outdoor fan OFF
ON ON
Indoor fan
OFF
Breeze 10 seconds, then stop
11.7.4 Rated capacity test
Set mode to cooling mode
Set temp. to 30 °C
Set fan speed to high speed
Push turbo button 5 times in 10 seconds.
Using special remoter controller
After 5 hours, cancel rated capacity test
11.8. Outdoor low temperature protection (optional)
Factory standard unit has not this function.
Unit stops when outdoor temp. is low than -15°C and lasting time more than 60 minutes, and unit runs
again when outdoor temp. more than -12°C.
When indoor PCB J1 jump is on, this function is available.
11.9. Automatic operation mode
The air conditioner automatically selects one of the following operation modes: cooling, heating or fan
only according to the temp. difference between room temp. (TA) and set temp. (TS).
TA—TS Operation mode
TA—TS>2℃ Cooling
-1℃≤TA-TS≤+2℃ Fan-only
TA-TS<-1℃ Heating (air-only for cooling only type)
11.10. Manual switch
11.10.1 Mode changes when push this button .
Cooing mode Auto modeUnit off Cooing mode
11.10.2 At Cooing mode, after 30 minutes cooling operation whose fan speed is set as low, the A/C
operates with a setting temp. of 24℃.
11.10.3 At auto mode, the A/C operates with a set temp. of 24℃
11.11. Timer Function
11.11.1 The maximum length of timer is 24 hours and the minimum resolving power is 15 minutes.
11.11.2 Timer on: first turn off the A/C, the A/C will be automatically on at the set time.
11.11.3 Timer off: first turn on the A/C, the A/C will be automatically off at the set time
11.11.4 Timer on/off function( on time is earlier than off time): first turn off the A/C, it will be
automatically on at set time, and later be off at the set time, then unit turns on at set time.
11.11.5 Timer off/on function( off time is earlier than on time): first turn on the A/C, it will be
automatically off at set time, and later be on at the set time, then unit turns off at set time.
11.12. Sleep mode
11.12.1 It is available at cooling, heating or auto mode.
11.12.2 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.
28
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29
11.12.3 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 (Cold air proof function takes precedence over all).
11.12.4 Auto:
The Sleep Mode running function operates in accordance with selected running mode by auto mode.
11.12.5 After 7 hours, unit cancels this modes automatically.
11.13. 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.
11.14. Turbo function
The indoor fan will work in super high speed, the frequency of compressor will increase, the max run
time is 30 minutes. After 30 minutes, the unit will work in previous setting.
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30
12. Model and Parameters
Model MSC-09HRDN1 MSC-12HRDN1 MSH-09HRDN1 MSH-12HRDN1
RACFAN 1300 1250 1200 1250
RAHFAN 1300 1300 1300 1300
RATIFC 60 74 57 74
RATIFH 55 77 57 77
SLEEPTIMC 7 7 7 7
FANCSHIGH 1300 1250 1200 1250
FANHSHIGH 1300 1300 1300 1300
FANCHIGH 1250 1250 1200 1250
FANHHIGH 1250 1300 1300 1300
FANMID 1100 1000 1000 1000
FANLOW 880 850 850 900
FANSLOW 800 700 700 700
F1 30 30 30 30
F2 38 38 38 38
F3 45 48 45 48
F4 52 57 52 57
F5 57 66 57 66
F6 64 76 64 76
F7 74 84 74 84
F8 86 90 86 90
F9 92 94 92 94
F10 96 98 96 98
I1COOL 6.0 6.5 6.0 6.5
I2COOL 7.0 8.3 7.0 8.3
I3COOL 8.5 9.5 8.5 9.5
I1HEAT 7.0 7.0 7.0 7.0
I2HEAT 8.5 9.0 8.5 9.0
I3HEAT 10.0 10.5 10.0 10.5
TCDI -6 -6 -6 -6
TCDE1 12 12 12 12
TCDE2 8 8 8 8
TEL2 24 24 24 24
TEH2 53 53 53 53
ANGLSTART 200 193 200 200
ANGLOFF 110 101 106 125
ANGLHEATMAX 18 11 26 26
ANGLHEAT 27 17 38 40
ANGLHEATMIN 53 51 53 53
ANGLSMALL 0 0 0 0
ANGLCOOLMAX 186 180 195 195
ANGLCOOL 183 176 186 180
ANGLCOOLMIN 160 155 168 168
PDELAYCOUNT 127 127 127 127
V1 74 74 74 74
V2 45 45 45 45
Page 35
Service manual
13. Troubleshooting
13.1 Indoor Unit Error Display
Display LED STATUS
E0 EEPROM error
E1 Indoor / outdoor units communication protection
E2 Zero-crossing examination error
E3 Fan speed beyond control
E5 Open or short circuit of outdoor temperature sensor
E6 Room temperature or evaporator temperature sensor open or short circuit of
P0 Module protection
P1 Over voltage or too low voltage protection
P2 Compressor top protection against temperature
P3 Outdoor low temp. protection
P4 Inverter compressor drive error
Note: E4: Reserved function
13.1.1
Display LED STATUS
E0 EEPROM parameter error
31
13.1.2 circuit or software error on indoor cortrol board
Display LED STATUS
E1 Indoor / outdoor units communication protection
Circuit or software error on indoor control board
Replace the control board of indoor
Page 36
Service manual
Disconnect the power supply, after 1 minutes, connect the power supply , turn on the
unit using remote controller, does the unit work normally ?
32
No
13.1.3
Display LED STATUS
E2 Zero-crossing examination error
13.1.4
Display LED STATUS
E3 Fan speed beyond control
Is power supply right?
Is connector connection good?
Indoor PCB is defective
Yes
Yes
Does the led on outdoor control board bright?
No
YES
Replace the module board.(The
power supply of PCB is supplied
by the module board.)
Replace the outdoor power
supply board.
Yes
Is the voltage on terminal CZ1 and CZ2 of the outdoor main PCB is 5V?
NO
Is the connection on outdoor control board and
between indoor and outdoor unit good? Does the L、
N connect good? Does the S wire connect reliably?
NO
NO
YES
Is the voltage between P and
N on inverter module 380V?
Replace the indoor control board.
Replace the outdoor main
PCB
Page 37
Service manual
33
Yes
13.1.5
Display LED STATUS
E5 Open or short circuit of outdoor temperature sensor
Yes No
13.1.6
Display LED STATUS
E6 Room temperature or evaporator temperature sensor open or short circuit
yes No
13.1.7
Display LED STATUS
P0 Module protection
Is connector connection good?
Is voltage being applied to the fan motor?
(
rang 90v-160v between mid pin and N on CN1
No
Indoor fan motor is defective
Repair the connector.
No
Yes
Indoor PCB is defective
Is connection to connector good?
Replace the sensor Repair connector
Is connection to connector good?
Replace the sensor
Repair connector
If display E5 all the same, replace indoor main PCB.
If display E6 all the same, replace outdoor main PCB.
Replace indoor main PCB.
Replace indoor fan motor.
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34
No
Is connection to connector good?
Yes
Yes
No
Yes
Yes
No
No
No Yes
13.1.8
Display LED STATUS
P1 Over voltage or too low voltage protection
13.1.9
Display LED STATUS
P2 Compressor top protection against temperature
Off: 115゜C; On: 100゜C
Is the wires to compressor right?
Check the inverter module, If some component
cracked or damaged?
Is it breakdown between P-N,P-U,P-V;N-W,N-U,N-V
A
t inverter module
Check compressor Inverter module is defective
Repair connector
Check the voltage between P and N on inverter
module. Is it about 380V?
Test the outdoor power supply board again.
Inverter module damaged, replace it.
Is the power supply right?
Check the outdoor power board
Replace outdoor main PCB.
Yes
Page 39
Service manual
No
Does compressor operate?
35
13.1.10
Display LED STATUS
P3 Outdoor low temp. protection
This is optional, factory standard unit has not this function.
Unit stops when outdoor temp. is low than -15°C and lasting time more than 60 minutes, and unit
runs again when outdoor temp. more than -12°C.
13.1.11
Display LED STATUS
P4 Inverter compressor error
Is refrigerant circulation volume normal?
Gas charging
Is abnormality the same after gas charging
Check refrigerant system (such as clogging of
Is protector normal?
Check the outdoor main PCB
Replace protector
No
Yes
Yes
No
No
Is the outdoor temp. low than -15°C?
Is the outdoor temp sensor right according to the table in clause 12
Replace the outdoor main board
No
Yes
Is the connection good?
Yes
No
Connect and test again.
Replace the outdoor main PCB.
A
re the U,V,W connected to compressor and inverter module right?
A
nd is the compressor feed back wires(CN514）connected to PCB good.？
No
Page 40
Service manual
36
13.2 Diagnostic chart
After energizing, no indicator is lighted and the air conditioner can’t be operated.
Reconnecting
Yes
Replace outdoor main PCB
If the problem can not be solved, replace inverter module
Replace inverter compressor
No
If the problem comes to again, check wingding resistance of inverter compressor, is it 0.64 ohm?
Page 41
Service manual
37
Aft er energizing , the air conditioner c an not be operat ed .
Check if AC 220 V power s upply outputs to indoor PC B .
Check if A C 220V exist s at t he primary coil of trans former.
Yes
YES
No
Check if A C 14. 5V exis ts at the sec ondary coil of transf ormer .
Indoor PC B is def ectiv e.
Take off the sec ondary plug of transformer , and then check if AC
14. 5V exists at t he sec ondary coil of t ransf ormer.
No
Yes
Yes
Indoor PC B is def ectiv e.Indoor PCB is defectiv e.
No
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Service manual
13.3 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:
Res etti ng phenomenon often occ urs during operat ion .
Aft er changing indoor PCB , check i f the f ailure realease .
Yes
Aft er changing indoor fan mot or , check i f the f ailure realeas e .
Yes
YES
Yes
Power supply circ uit has problems .
Indoor PCB is defective.
13.4 Operation lamp flashes and Timer lamp off
Is c onnector connecti on good ?
Is voltage being appl ied to the f an motor ?
Fan motor is defective
Yes
No
Repair t he connect or .
No
Indoor PC B is defective.
13.5 Operation lamp flashes and Timer lamp on
Is c onnector connecti on good ?
Replac e the senc or ,
No
Repair t he connect or .
38
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Service manual
13.6 Operation lamp off and Timer lamp flashes
Operation lam p off and Timer lamp flas hes
The voltage of power supply is too low (less than 187V ).
No
Indoor PC B is defective.
Aft er changing the m ain control board , check if the failure realease .
Power supply f ault .
No
Outdoor unit fault (such
as the c ompress or).
13.7 Operation lamp on and Timer lamp flashes
EEROM error, indoor PCB is defective.
13.8 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.
39
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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
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