Midea MSQ-07CR, MSQ-07HR, MSQ-09CR, MSQ-09HR, MSQ-12CR Service Manual

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MSQ-07CR; MSQ-07HR MSQ-09CR; MSQ-09HR MSQ-12CR; MSQ-12HR

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Content

1.

Precaution ...................................................................................................................... Ошибка! Закладка не определена.

1.1. Safety Precaution ......................................................................................................... Ошибка! Закладка не определена.

1.2. Warning ........................................................................................................................ Ошибка! Закладка не определена.

2. Function ................................................................................................................................................................................ 3

3. Dimension ............................................................................................................................................................................. 5

3.1 Indoor unit .............................................................................................................................................................................. 5

3.2 Outdoor unit ............................................................................................................................................................................ 6

4. Specification ......................................................................................................................................................................... 8

5. Refrigerant cycle diagram .................................................................................................................................................. 10

6. Operation limits .................................................................................................................................................................. 11

6.1 Cooling operation ................................................................................................................................................................. 11

6.2 Heating operation ................................................................................................................................................................. 11

7. Schematic diagram and Wiring diagram ........................................................................................................................... 12

7.1. Schematic diagram ............................................................................................................................................................... 12

7.2. Wiring diagram ..................................................................................................................................................................... 13

8. Installation details .............................................................................................................................................................. 16

8.1 Wrench torque sheet for installation ...................................................................................................................................... 16

8.2 Connecting the cables .......................................................................................................................................................... 16

8.3 Pipe length and the elevation ................................................................................................................................................ 16

8.4 Air purging of the piping and indoor unit ................................................................................................................................ 17

8.5 Pumping down (Re-installation) ............................................................................................................................................ 18

8.6 Re-air purging (Re-installation) ............................................................................................................................................. 19

8.7 Balance refrigerant of the 2-way, 3-way valves ..................................................................................................................... 20

8.8 Evacuation............................................................................................................................................................................ 21

8.9 Gas charging ........................................................................................................................................................................ 22

9. Pressure table ..................................................................................................................................................................... 23

9.1 MSQ3-07CR ......................................................................................................................................................................... 23

9.2 MSQ3-07HR ......................................................................................................................................................................... 23

9.3 MSQ3-09CR ......................................................................................................................................................................... 24

9.4 MSQ3-09HR ......................................................................................................................................................................... 24

9.5 MSQ3-12CR ......................................................................................................................................................................... 25

9.6 MSQ3-12HR ......................................................................................................................................................................... 25

10. Capacity table ..................................................................................................................................................................... 26

10.1 MSQ3-07CR ......................................................................................................................................................................... 26

10.2 MSQ3-07HR ......................................................................................................................................................................... 26

10.3 MSQ3-09CR ......................................................................................................................................................................... 27

10.4 MSQ3-09HR ......................................................................................................................................................................... 28

10.5 MSQ3-12CR ......................................................................................................................................................................... 29

10.6 MSQ3-12HR ......................................................................................................................................................................... 29

11. E l ectr o nic fun ction ............................................................................................................................................................. 31

11.1 Proper symbols and their meaning ....................................................................................................................................... 31

11.2 Function ............................................................................................................................................................................... 31

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11.3 Protection ............................................................................................................................................................................. 31

11.4 Fan-only mode ..................................................................................................................................................................... 32

11.5 Cooling mode ....................................................................................................................................................................... 32

11.6 Dehumidifying mode ............................................................................................................................................................. 33

11.7 Heating mode ....................................................................................................................................................................... 34

11.8 Defrosting mode(available for heating mode) ........................................................................................................................ 35

11.9 Auto mode ............................................................................................................................................................................ 36

11.10 Force cooling function ........................................................................................................................................................... 36

11.11 Sleep mode .......................................................................................................................................................................... 37

11.12 Auto restart function.............................................................................................................................................................. 37

12. Model and Parameters ....................................................................................................................................................... 38

13. Troubleshooting ................................................................................................................................................................. 39

13.1. For all cooling only model ..................................................................................................................................................... 39

13.2. For all heat pump model ....................................................................................................................................................... 39

13.3. Diagnostic chart .................................................................................................................................................................... 40

13.4. Resetting phenomenon often occurs during operation. ......................................................................................................... 41

13.5. Operation lamp flashes and Timer lamp off. .......................................................................................................................... 41

13.6. Operation lamp flashes and Timer lamp on. .......................................................................................................................... 41

13.7. Operation lamp off and Timer lamp flashes ........................................................................................................................... 42

13.8. Operation lamp on and Timer lamp flashes ........................................................................................................................... 42

13.9. Operation lamp flashes, Timer lamp flashes . ....................................................................................................................... 42

14. Characteristic of temperature sensor ............................................................................................................................... 43

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1. Precaution

1.1. Safety Precaution

 To prevent injury to the user or other people and property damage, the following instructions must be followed.  Incorrect operation due to ignoring instruction will cause harm or damage.  Before service unit, be sure to read this service manual at first.

1.2. Warning

 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, s el l er, 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 electr ic

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 deteriorat e with age.

If the base collapse s, t he air conditioner coul d 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 shoc k.

 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 s hoc k.

 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

Service manual

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power supply plug or turn off the breaker.

There is risk of product d ama g e or fa ilure, or unintended

operation.

 Take care to ensure that nobody could step on or fall onto the

outdoor unit.

This could result in personal in jury and pr od uct d ama ge.

 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 cau se w ater 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.

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2. Function

The function will be operate in any operation mode.

Indoor unit

Operation ON/OFF by remote controller

Maintain the room temperature in accordance with the setting temperature.

Room temperature

Indoor fan is delayed for 5 sec at the starting.

Starting temperature control

Restarting is for approx. 3 minutes..

Time Delay Safety control

Turbo wind, high, med, low, breeze.

Indoor fan speed control

Light up in the LED (LCD) for each operation mode.

The fan is turn to low speed (cooling/heating).

The unit will be turn off after seven hours.

Sleep mode auto control

The function is usually used in rainy days in

springtime or damp areas.

Independent dehumidification

Operation indication Lamps (LED)

The louver can be set at the desired position or swing up and

down automatically

Air flow Direction

The unit can be change by the room temperature.

Auto mode

Easy clean panel

Flexible wiring connection

Defrost mode

Temp. Compensation

Auto-restart function

Self-diag. function

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The unit has 3 mins delay between continuously ON/OFF operations.

Outdoor unit

Power relay control

Bird tail propeller fan makes the outdoor unit run more quietly.

Low noise air flow system

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.

Discharge pipe temperature protect

Anti-rust cabinet

Valve protection cover

4 way valve control

Service manual

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3. Dimension

3.1 Indoor unit

MSQ-07/09/12C(H)R

Service manual

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3.2 Outdoor unit

MSQ-07/09C(H)R

Service manual

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MSQ-12C(H)R

Service manual

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4. Specification

Model

MSQ3-07CR-QB8H

MSQ3-07HR-QB8H

MSQ3-09CR-QB8H

Power supply

Ph-V-Hz

1, 220-240V~,50Hz

Cooling

Capacity

Btu/h

7000

9000

Input

W

820

1000

Rated current

A

3.6

4.1

EER

W/W

9.55

Heating

Capacity

Btu/h 8000 Input

W 720 Rated current

A 3.2 COP

W/W 10.2 Max. input consumption

W

1000

1300

Max. current

A 5 5

6.3

Starting current

A

14

19.8

Compressor

Model

2P14C225ANA

2P14C235ANA

PH180X1C-4DZDE3

Type

ROTARY

Rotary

Brand

Matsushita

GD Matsushita

GD TOSHIBA

Capacity

Btu/h

7455

10287

Input

W

725

965

Rated current(RLA)

A

3.4

4.5

Locked rotor Amp(LRA)

A

14

19.8

Thermal protector

B150-145-241E

B160-135-141E

Capacitor

uF

25

30

Refrigerant oil

ml

270

400

Indoor fan

motor

Model

RPG20D

Brand

Welling

Input

W

32

Capacitor

uF

1.2

Speed(hi/mi/lo)

r/min

1040/900/800

Indoor air flow (Hi/Mi/Lo)

m3/h

490

520/470/420

520

Indoor noise level (Hi/Mi/Lo)

dB(A)

34/31/25

35/31/26

Outdoor fan

motor

Model

YDK24-6T

Brand

Welling

WELLING

Input

W

62

Capacitor

uF

2.5

2.5μF/450V

Speed

r/min

815

Outdoor air flow

m3/h

1400

1500

Outdoor noise level

dB(A)

49

52

50

Refrigerant type R22

g

580

620

650

Design pressure

MPa

2.6

Refrigerant

piping

Liquid side/ Gas side

mm(inch)

Ф

6.35/Ф9.53

Ф

6.35/Ф9.53

Ф

6.35/Ф9.53

Max. refrigerant pipe length

m

10

Max. difference in level

m 5 5

5

Plug type

CS-006/15A 250V

16A

CS-006/15A 250V

Thermostat type

Electronic control

Operation temp

℃

17-30

Ambient temp

℃

18-45

-7 - 45

18-45

Application area

m2

12-16

14-21

Note:

 Th e noise date is base on hemi-anechoic chamber, during actual operation; these values are normal ly somewhat different as a result of

ambient condition.

 The above design and specifications are subject to change without prior notice for product improvement.

Service manual

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Model

MSQ3-09HR-QB6

MSQ3-12CR-QB8

MSQ3-12HR-QB6

Power supply

Ph-V-Hz

220V~,50Hz

Cooling

Capacity

Btu/h

9000

12000

Input

W

1000

1350

Rated current

A

4.5

6.0

EER

W/W

9.55

Heating

Capacity

Btu/h

10000

_

13500

Input

W

980 _ 1230

Rated current

A

4.4 _ 5.6

COP

W/W

10.2 _ 10.2

Max. input consumption

W

1300

1700

Max. current

A 6 8.0

8.0

Starting current

A

19.8

26

30

Compressor

Model

2P18S225ANK

PH200X2C-8FTC

PH225X2C-4FT

Type

Rotary

Brand

GD Matsushita

TOSHIBA

GD Matsushita

Capacity

Btu/h

9911

11839

13204

Input

W

970

1135

1250

Rated current(RLA)

A

4.5

5.2

5.7

Locked rotor Amp(LRA)

A

19.8

26

30

Thermal protector

External

UP3QE0591-T51

External

Capacitor

uF

30

25μF/370V

35

Refrigerant oil

ml

SUNISO 350

440

480

Indoor fan

motor

Model

RPG13H

Brand

WELLING

Input

W

33

Capacitor

uF

1.2μF/450V

Speed(hi/mi/lo)

r/min

1060/940/880

1130

1130/1080/1030

Indoor air flow (Hi/Mi/Lo)

m3/h

520/470/420

550

550/500/450

Indoor noise level (Hi/Mi/Lo)

dB(A)

35/31/26

37/33/27

Outdoor fan

motor

Model

YDK24-6T

YDK24-6

Brand

WELLING

Input

W

62

72

Capacitor

uF

2.5μF/450V

Speed

r/min

800

850

Outdoor air flow

m3/h

1500

1800

Outdoor noise level

dB(A)

53

52

Refrigerant type R22

g

870

730

860

Design pressure

MPa

2.6

Refrigerant

piping

Liquid side/ Gas side

mm(inch

Ф

6.35/Ф9.53

Ф

6.35/Ф12.7

Ф

6.35/Ф12.7

Max. refrigerant pipe

m

10

Max. difference in level

m 5 3X1.5mm2

No

Plug type

16A

CS-006/15A

16A

Thermostat type

Electronic control

Operation temp

℃

17-30

Ambient temp

℃

-7 - 45

18-45

-7 - 45

Application area

m2

14-21

18-26

Note:

 Th e noise date is base on hemi-anechoic chamber, during actual operation; these values are normally somewhat different as a result of

ambient condition.

 The above design and specifications are subject to change without prior notice for product improvement.

Service manual

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5. Refrigerant cycle diagram

 Cooling only

 Heat pump mode

Service manual

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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.

Service manual

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7. Schematic diagram and Wiring diagram

7.1. Schematic diagram

Service manual

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7.2. Wiring diagram

MSQ3-07CR, MSQ3-09CR, MSQ3-12CR

Service manual

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MSQ3-07HR, MSQ3-09HR, MSQ3-12HR

MSQ3-12HR

Service manual

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Service manual

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8. Installation de tails

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

8.2 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

8.3 Pipe length and the elevation

Capacity

Btu/h

Pipe size

Standard

length

(m)

Max.

Elevation

B (m)

Max. Pipe

length

A (m)

Additional

refrigerant

(g/m)

GAS LIQUID

07k~09K

3/8’’ (φ9.52) 1/4’’ (φ6.35)

5 5 10 30

12K

1/2’’ (φ12.7) 1/4’’ (φ6.35)

5 5 10 30

Caution:

Capacity is base on standard length and maximum allowance length is base of reliability.

Oil trap should be install per 5-7 meters.

In case that

more than 5m.

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8.4 Air purging of the piping and indoor unit

Required tools:

Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector.

Note:

The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will affect the compressor, reduce

the cooling capacity, and could lead to a malfunction of unit.

Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it prevents the gas leakage from the

refrigeration cycle.

Procedure

1. Recheck the piping connections.

2. Open the valve stem of the 2-way valve counterclockwise approximately 90’, wait 10 seconds, and then set it to closed

position.

 Be sure to use a hexagonal wrench to operate the valve

stem

3. Check for gas leakage.

 Check the flare connection for gas leakage

4. Purge the air from the system.

 Set the 2-way valve to the open position and remove the

cap from the 3-way valve’s service port.

 Using the hexagonal wrench to press the valve core pin,

discharge for three seconds and then wait for one

minute.

5. Use torque wrench to tighten the service port cap to a torque

of 1.8 kg.m. (18n.m)

6. Set the 3-way valve to the opened position.

7. Mounted the valve stem nuts to the 2-way and 3-way valves.

8. Check for gas leakage.

 At this time, especially check for gas leakage from the

2-way and 3-way stem nuts, and from the service port.

Caution:

If gas leakage is discovered in step (3) above, take the

following measures.

If the leaks stop when the piping connections are tightened

further, continue working from step (4).

If the gas leaks do not stop when the connections are

retightened, repair the location of the leak, discharge all of the

gas through the service port, and then recharge with the

specified amount of gas from a gas cylinder.

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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.

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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.

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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.

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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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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.

Service manual

23

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 MSQ-07CR

Cooling mode

Outdoor temperature (Dry bulb temp)

Indoor Conditions Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Pressure

(kg/cm2 )

6.2 6.7 7.2 8.0 8.5 9.4

24ºC D

17ºC W

Pressure

(kg/cm2)

6.3 6.5 7.5 8.1 8.7 9.5

27ºC D

19ºC W

Pressure

(kg/cm2)

6.1 6.8 7.7 8.2 9.0 10.0

32ºC D

23ºC W

Pressure

(kg/cm

2

)

7.0 7.3 7.8 8.4 9.2 10.1

9.2 MSQ-07HR

Cooling mode

Outdoor temperature (Dry bulb temp)

Indoor Conditions Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Pressure

( kg/cm2 )

6.2 6.7 7.2 8.0 8.5 9.4

24ºC D

17ºC W

Pressure

( kg/cm2 )

6.3 6.5 7.5 8.1 8.7 9.5

27ºC D

19ºC W

Pressure

( kg/cm2 )

6.1 6.8 7.7 8.2 9.0 10.0

32ºC D

23ºC W

Pressure

( kg/cm

2

)

7.0 7.3 7.8 8.4 9.2 10.1

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 )

24.0 23.0 21.5 21.0 20..5 /

18ºC

Pressure

( kg/cm2 )

24.6 23.5 23.0 22.6 20.8 /

20ºC

Pressure

( kg/cm2 )

25.0 24.2 24.0 23.0 21.0 /

22ºC

Pressure

( kg/cm2 )

25.3 24.6 24.5 23.8 21.7 /

Service manual

24

9.3 MSQ-09CR

Cooling mode Outdoor temperature (Dry bulb temp)

Indoor Conditions Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Pressure

( kg/cm2 )

7.8 8.1 8.4 9.0 9.3 10.0

24ºC D

17ºC W

Pressure

( kg/cm2 )

7.9 8.2 8.7 9.0 9.5 10.1

27ºC D

19ºC W

Pressure

( kg/cm2 )

8.0 8.5 9.2 9.9 10.2 10.8

32ºC D

23ºC W

Pressure

( kg/cm

2

)

8.8 9.1 9.2 10.0 10.5 11.2

9.4 MSQ-09HR

Cooling mode Outdoor temperature (Dry bulb temp)

Indoor Conditions Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Pressure

( kg/cm

2

)

7.8 8.1 8.4 9.0 9.3 10.0

24ºC D

17ºC W

Pressure

( kg/cm

2

)

7.9 8.2 8.7 9.0 9.5 10.1

27ºC D

19ºC W

Pressure

( kg/cm

2

)

8.0 8.5 9.2 9.9 10.2 10.8

32ºC D

23ºC W

Pressure

( kg/cm

2

)

8.8 9.1 9.2 10.0 10.5 11.2

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/cm

2

)

26.5 25.0 22.0 21.5 20.5 /

18ºC

Pressure

( kg/cm2 )

27.0 26.0 23.5 22.5 20.8 /

20ºC

Pressure

( kg/cm2 )

27.5 26.5 25.0 23.0 21.0 /

22ºC

Pressure

( kg/cm2 )

28.5 27.0 25.5 23.9 21.5 /

Service manual

25

9.5 MSQ-12CR

Cooling mode Outdoor temperature (Dry bulb temp)

Indoor Conditions Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Pressure

( kg/cm

2

)

8.4 8.5 8.8 8.9 9.4 9.9

24ºC D

17ºC W

Pressure

( kg/cm

2

)

8.6 8.8 9.2 9.4 10.0 10.4

27ºC D

19ºC W

Pressure

( kg/cm

2

)

8.8 9.2 9.4 9.8 10.3 10.9

32ºC D

23ºC W

Pressure

( kg/cm

2

)

9.2 9.6 9.9 10.4 10.8 11.2

9.6 MSQ-12HR

Cooling mode Outdoor temperature (Dry bulb temp)

Indoor Conditions Pressure 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Pressure

( kg/cm

2

)

8.4 8.5 8.8 8.9 9.4 9.9

24ºC D

17ºC W

Pressure

( kg/cm

2

)

8.6 8.8 9.2 9.4 10.0 10.4

27ºC D

19ºC W

Pressure

( kg/cm

2

)

8.8 9.2 9.4 9.8 10.3 10.9

32ºC D

23ºC W

Pressure

( kg/cm

2

)

9.2 9.6 9.9 10.4 10.8 11.2

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/cm

2

)

27.4 25.9 22.2 21.4 20.0 /

18ºC

Pressure

( kg/cm

2

)

29.8 27.2 23.8 22.0 21.1 /

20ºC

Pressure

( kg/cm

2

)

30.2 29.1 24.2 23.6 22.1 /

22ºC

Pressure

( kg/cm2 )

32.4 30.1 25.4 24.0 22.7 /

Service manual

26

10. Capacity table

10.1 MSQ-07CR SUMMER OUTDOOR TEMPERATURE DRY

Indoor

Conditions

25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Total capacity kW 2.02 1.92 1.79 1.64 1.51 1.41

Sensitive capacity kW 1.44 1.39 1.34 1.27 1.20 1.15

Input kW. 0.70 0.76 0.82 0.88 0.95 1.00

24ºC D

17ºC W

Total capacity kW 2.16 2.07 1.95 1.83 1.71 1.60

Sensitive capacity kW 1.53 1.48 1.43 1.38 1.34 1.32

Input kW. 0.70 0.77 0.84 0.90 0.97 1.03

27ºC D

19ºC W

Total capacity kW 2.32 2.27

2.15 1.98 1.81 1.65

Sensitive capacity kW 1.65 1.62 1.56 1.48 1.41 1.34

Input kW. 0.72 0.79 0.85 0.92 0.99 1.05

32ºC D

23ºC W

Total capacity kW 2.54 2.45 2.36 2.28 2.18 2.07

Sensitive capacity kW 1.57 1.59 1.57 1.55 1.53 1.54

Input kW. 0.71 0.79 0.87 0.95 1.03 1.10

10.2 MSQ-07HR SUMMER OUTDOOR TEMPERATURE DRY

Indoor

Conditions

25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Total capacity kW 2.02 1.92 1.79 1.64 1.51 1.41

Sensitive capacity kW 1.44 1.39 1.34 1.27 1.20 1.15

Input kW. 0.70 0.76 0.82 0.88 0.95 1.00

24ºC D

17ºC W

Total capacity kW 2.16 2.07 1.95 1.83 1.71 1.60

Sensitive capacity kW 1.53 1.48 1.43 1.38 1.34 1.32

Input kW. 0.70 0.77 0.84 0.90 0.97 1.03

27ºC D

19ºC W

Total capacity kW 2.33 2.28

2.11 1.99 1.82 1.66

Sensitive capacity kW 1.66 1.63 1.57 1.49 1.42 1.35

Input kW. 0.72 0.79 0.85 0.92 0.99 1.05

32ºC D

23ºC W

Total capacity kW 2.54 2.45 2.36 2.28 2.18 2.07

Sensitive capacity kW 1.57 1.59 1.57 1.55 1.53 1.54

Input kW. 0.71 0.79 0.87 0.95 1.03 1.10

Service manual

27

WINTER OUTDOOR CONDITIONS

Indoor Conditions

12ºC D

11ºC W

7

ºC D

6ºC W

4

ºC D

3ºC W

0

ºC D

-1ºC W

-4

ºC D

-6ºC W

-7

ºC D

-8ºC W

15ºC

Capacity kW 2.89 2.59 2.41 1.54 1.31 1.27

Input kW. 0.97 0.84 0.75 0.65 0.63 0.64

18ºC

Capacity kW 2.74 2.47 2.25 1.47 1.37 1.21

Input kW. 0.97 0.84 0.76 0.69 0.66 0.64

20ºC

Capacity kW 2.72

2.49 2.22 1.41 1.28 1.25

Input kW. 1.00 0.88 0.79 0.69 0.65 0.62

22ºC

Capacity kW 2.54 2.43 2.13 1.31 1.29 1.21

Input kW. 0.92 0.87 0.79 0.68 0.66 0.61

10.3 MSQ-09CR SUMMER OUTDOOR TEMPERATURE DRY

Indoor

Conditions

25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Total capacity kW 2.44 2.32 2.16 1.98 1.82 1.70

Sensitive capacity kW 1.68 1.63 1.56 1.48 1.40 1.34

Input kW. 0.87 0.95 1.02 1.09 1.17 1.24

24ºC D

17ºC W

Total capacity kW 2.62 2.50 2.36 2.20 2.07 1.94

Sensitive capacity kW 1.78 1.73 1.67 1.61 1.56 1.54

Input kW. 0.87 0.95 1.03 1.11 1.20 1.28

27ºC D

19ºC W

Total capacity kW 2.80 2.75

2.60 2.40 2.18 1.99

Sensitive capacity kW 1.93 1.89 1.82 1.73 1.64 1.57

Input kW. 0.89 0.97 1.05 1.14 1.22 1.30

32ºC D

23ºC W

Total capacity kW 3.12 2.98 2.86 2.76 2.63 2.50

Sensitive capacity kW 1.83 1.85 1.84 1.81 1.78 1.79

Input kW. 0.88 0.98 1.07 1.17 1.27 1.37

Service manual

28

10.4 MSQ-09HR SUMMER OUTDOOR TEMPERATURE DRY

Indoor

Conditions

25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Total capacity kW 2.44 2.32 2.16 1.98 1.82 1.70

Sensitive capacity kW 1.68 1.63 1.56 1.48 1.40 1.34

Input kW. 0.87 0.95 1.02 1.09 1.17 1.24

24ºC D

17ºC W

Total capacity kW 2.62 2.50 2.36 2.20 2.07 1.94

Sensitive capacity kW 1.78 1.73 1.67 1.61 1.56 1.54

Input kW. 0.87 0.95 1.03 1.11 1.20 1.28

27ºC D

19ºC W

Total capacity kW 2.82 2.77

2.62 2.42 2.20 2.01

Sensitive capacity kW 1.93 1.89 1.82 1.73 1.64 1.57

Input kW. 0.89 0.97 1.05 1.14 1.22 1.30

32ºC D

23ºC W

Total capacity kW 3.12 2.98 2.86 2.76 2.63 2.50

Sensitive capacity kW 1.83 1.85 1.84 1.81 1.78 1.79

Input kW. 0.88 0.98 1.07 1.17 1.27 1.37

WINTER OUTDOOR CONDITIONS

Indoor Conditions

12ºC D

11ºC W

7

ºC D

6ºC W

4

ºC D

3ºC W

0

ºC D

-1ºC W

-4

ºC D

-6ºC W

-7

ºC D

-8ºC W

15ºC

Capacity kW 3.58 3.18 2.80 1.82 1.52 1.47

Input kW. 1.18 1.05 0.94 0.81 0.75 0.80

18ºC

Capacity kW 3.37 3.02 2.72 1.73 1.60 1.41

Input kW. 1.20 1.05 0.96 0.86 0.83 0.84

20ºC

Capacity kW 3.35

3.05 2.70 1.64 1.48 1.44

Input kW. 1.24 1.08 0.98 0.86 0.82 0.82

22ºC

Capacity kW 3.11 2.97 2.57 1.40 1.50 1.39

Input kW. 1.14 1.07 0.98 0.86 0.82 0.79

Service manual

29

10.5 MSQ-12CR SUMMER OUTDOOR TEMPERATURE DRY

Indoor

Conditions

25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Total capacity kW 3.31 3.14 2.92 2.68 2.45 2.28

Sensitive capacity kW 2.53 2.28 2.18 2.07 1.96 1.88

Input kW. 1.11 1.21 1.32 1.42 1.52 1.63

24ºC D

17ºC W

Total capacity kW 3.55 3.39 3.19 2.99 2.79 2.61

Sensitive capacity kW 2.50 2.42 2.34 2.25 2.19 2.16

Input kW. 1.11 1.22 1.34 1.45 1.56 1.67

27ºC D

19ºC W

Total capacity kW 3.81 3.73

3.53 3.24 2.96 2.69

Sensitive capacity kW 2.71 2.65 2.55 2.42 2.30 2.19

Input kW. 1.14 1.25 1.36 1.48 1.59 1.71

32ºC D

23ºC W

Total capacity kW 4.05 3.96 3.88 3.75 3.57 3.39

Sensitive capacity kW 2.56 2.59 2.57 2.53 2.50 2.51

Input kW. 1.15 1.26 1.43 1.53 1.66 1.80

10.6 MSQ-12HR SUMMER OUTDOOR TEMPERATURE DRY

Indoor

Conditions

25ºC 30ºC 35ºC 40ºC 45ºC 50ºC

21ºC D

15ºC W

Total capacity kW 3.35 3.18 2.96 2.72 2.49 2.32

Sensitive capacity kW 2.53 2.28 2.18 2.07 1.96 1.88

Input kW. 1.15 1.25 1.36 1.46 1.56 1.67

24ºC D

17ºC W

Total capacity kW 3.59 3.43 3.23 3.03 2.83 2.65

Sensitive capacity kW 2.50 2.42 2.34 2.25 2.19 2.16

Input kW. 1.15 1.26 1.38 1.49 1.60 1.71

27ºC D

19ºC W

Total capacity kW 3.85 3.77

3.57 3.29 3.00 2.73

Sensitive capacity kW 2.71 2.65 2.55 2.42 2.30 2.19

Input kW. 1.18 1.29 1.40 1.52 1.63 1.75

32ºC D

23ºC W

Total capacity kW 4.09 4.00 3.92 3.79 3.61 3.43

Sensitive capacity kW 2.56 2.59 2.57 2.53 2.50 2.51

Input kW. 1.17 1.30 1.43 1.57 1.70 1.84

Service manual

30

WINTER OUTDOOR CONDITIONS

Indoor Conditions

12ºC D

11ºC W

7

ºC D

6ºC W

4

ºC D

3ºC W

0

ºC D

-1ºC W

-4

ºC D

-6ºC W

-7

ºC D

-8ºC W

15ºC

Capacity kW 4.67 4.14 3.64 2.31 1.90 1.83

Input kW. 1.36 1.29 1.14 0.96 0.88 0.84

18ºC

Capacity kW 4.39 3.92 3.52 2.18 2.00 1.84

Input kW. 1.50 1.29 1.16 1.03 0.97 0.87

20ºC

Capacity kW 4.36

3.96 3.49 2.07 1.84 1.80

Input kW. 1.54 1.33 1.19 1.03 0.98 0.88

22ºC

Capacity kW 4.06 3.85 3.32 1.73 1.86 1.73

Input kW. 1.63 1.33 1.20 1.00 0.98 0.92

Service manual

31

11. Electronic function

11.1 Proper symbols and their meaning TA: Indoor ambient temperature

TE: Indoor evaporator temperature

TS: Setting temperature through the remote controller

I

3sec

: Self-protection amp of compressor, continue three seconds until turns off the compressor.

I

5MIN

: Self-protection amp of compressor, continue five minutes until turns off the compressor.

I

FAN

: Self-protection amp of outdoor fan/indoor fans when they change from higher wind to lower wind.

I

RESTORE

: Amp self-protection return value

TH

DEFROST

: High wind, defrosting temperature difference

TM

DEFROST

: Middle wind, defrosting temperature difference

TL

DEFROST

: Low wind, defrosting temperature difference

TE1: Anti-cold wind, from Fan Off to Breeze temperature TE2: Anti-cold wind, from Breeze to Setting Fan Speed temperature TE3: Anti-cold wind, from Setting Fan Speed to Breeze temperature

TE4: Anti-cold wind, from Breeze to Fan Off temperature

TE5: Evaporator low temperature protection entering temperature

TE6: Evaporator low temperature protection restoring temperature

TE7: Evaporator high temperature protection, compressor off temperature

TE8: Evaporator high temperature protection, fan off temperature

TE9: Evaporator high temperature protection, restoring temperature

11.2 Function

Remote receiving

Testing and forced running

Position set for indoor unit wind vane

LED displaying and alarm

On or off Timer

Protection for the compressor

Current protection

High temperature protection of indoor heat exchanger at heating mode

Auto defrosting and heating recovery at heating mode

Anti cold air at heating mode

Anti frozen at cooling mode

11.3 Protection

11.3.1 3 minutes delay at restart for compressor.

11.3.2 Sensor protection at open circuit and breaking disconnection

11.3.3 Fan Speed is out of control. When Indoor Fan Speed is too high(higher than High Fan+300RPM)or too low(lower than 300RPM), the unit stops and LED displays failure information and can’t returns to normal operation autom aticall y.

11.3.4 Cross Zero signal error warning. If there is no Cross Zero signals in 4 minutes, the unit stops and LED displays failure

information and can’t returns to normal operation autom atically.

11.3.5 The current protection of the compressor

11.3.6

Service manual

32

11.3.7

Current up

I restore

I fan

I 5min

I 3sec

Indoor fan: On compressor: On outdoor fan:On

The outdoor fan turn off (heating) The outdoor fan turn low speed (cooling)

Compressor turn off (after 5 minute later)

Compressor turn off (after 3 minute later)

Current down

If compressor turns off for continuously 4 times due to current protection in 5 minutes from Compressor On, the unit stops and LED

displays failure information and can’t returns to normal operation automatically.

11.4 Fan-only mode

Fan speed is high/mid/low/ Auto

11.5 Cooling mode

The 4-way valve is closed at cooling mode.

The action of the compressor and the outdoor fan:

0

T-Ts

Room temp. up

Room temp. down

1

Compressor on

outdoor fan on

Compressor off

outdoor fan off

Service manual

33

Auto fan at cooling mode:

3

T-Ts

Room temp. up

Room temp. down

5

High fan

Low fan

1

Mid. fan

Anti-freezing control to indoor evaporator at cooling mode( T: evaporator temp. )

TE5

T

EVAP. temp. up

EVAP. temp. down

TE6

Compressor and

outdoor fan on

Compressor and outdoor

fan off (after 5 mins)

11.6 Dehumidifying mode

11.6.1 The 4-way valve is off in dehumidifying mode

11.6.2 Compressor and Indoor Fan actions in dehumidifying mode

11.6.3

0 TA-TS

2

C

B

A

Block

Indoor Fan

Compressor and Outdoor Fan

LOW ON 6minutes

BREEZE OFF 4minutes

LOW ON 5minutes

BREEZE OFF 5minutes

LOW ON 4minutes

BREEZE OFF 6minutes

A

B

C

Repeat on and off cycle.

11.6.4 Low room temperature protection:

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 13℃.

11.6.5 At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same as that of cooling mode.

11.6.6 At dehumidifying mode, t he action of fans of indoor is the same as that of air-only mode.

Service manual

34

11.7 Heating mode

11.7.1 Generally, t he 4-way valve is open in heating mode, but it is closed in defrosting mode. 4-way valve must delay 2 minutes compared with compressor if the compressor changed into non-heating mode or turned off. 4-way valve doesn't delay in

dehumidifying mode

11.7.2 Generally, t he outdoor fan is turned off with the on-off action of compressor in heating mode, except for the defrosting mode or the end of defrost

11.7.3 Action of compressor and outdoor fan motor at heating mode: compressor must run for 7 minutes after starting and then judge temperature. Meanwhile other protections are still valid.

Ts+2*

T

Room temp. up

Room temp. down

Ts+3*

Compressor and

outdoor fan off

Compressor and

outdoor fan on

Ts

* This parameter can be changed from 0 to 3

11.7.4 Indoor Fan actions at heating mode

Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but Ant i -cold wind functi on prevails .

Anti-cold wind control function at heating mode (T=indoor exchanger temp.)

T

T temp. up

T temp. down

TE2

Setting fan speed

Fan off

Breeze

TE3

TE1

TE4

Indoor fan changes breeze when compressor stop, after 127 second, indoor fan stop

11.7.5 Auto wind at heating mode

Service manual

35

11.7.6

0

T-Ts

Room temp. up

Room temp. down

2

Med fan

High fan

11.7.7

11.7.8 Indoor evaporator high-temperature protection at heating mode (T=indoor exchanger temp.)

11.7.9

T

T temp. up

T temp. down

TE7

Compressor on Fan on

TE8

TE9

Compressor off Fan off

Compressor on Fan off

11.7.10

11.7.11 The louver opens to Standard Angle ANGLHEAT when power is on for the first time

11.8 Defrosting mode(available for heating mode)

11.8.1 Defrosting condition: Defrosting starts when either of the following ①&②: ① A and B are satisfied:

A: The compressor keeps running for 40 minutes or more.

B: The temperature difference of evaporator and room temperature meets one of the following:

TM def.

TA-TS

TH def.

High fanMed fanLow fan

TL def.

Breeze

② Calculate from the end of latest defrost, evaporator high temp. Protection only closes outdoor fan with the compressor still

running. Add up to 90 minutes.

Service manual

36

11.8.2 Defrosting time

If the temperature difference condition ① is satisfied for less than 40 minutes, this can be regarded as severe frosting. The

defrosting time is 10 minutes.

If the temperature difference condition ② is satisfied for more than 40 minutes, the defrosting time is 7.5minutes.

If the temperature difference condition ① is satisfied out of 40 minutes, generally the defrosting time is 7.5minutes, after three

continuous 7.5-minute defrost, the fourth should be 10 minutes defrost. The circulation is as following:

7.5 minutes defrost

10 minutes

defrost

11.8.3 Ending condition of defrosting

If one of following conditions is satisfied, end the defrost and turn into heating mode:

A. The defrost time has reached to 7.5 or 10 minutes.

B. The compressor current has reached to I

DEFROST

or above, I

DEROST

differs in different models

11.8.4 Defrosting Actions

Defrost 10or 7.5minutes

45S 25S

Compressor

4-way Valve 23S

40S

Outdoor Fan

Indoor Fan

10S

11.9 Auto mode

11.9.1 The air conditioner automatically selects one of the following operation modes: cooling, heating or fan only according to the temperature difference between room temperature (TA) and set temperature (TS).

11.9.2

-1

TA-TS

2

Heating (fan only at cooling)

Fan only Cooling

11.9.3 The indoor fan blows automatically in corresponding selected mode

11.9.4 The motion of indoor fan’s blade should accord with the selected operation mode

11.9.5 One mode should be carried out for at least 15 minutes once selected. If the compressor cannot start for 15 minutes, reselect the operation mode according to the room temp. and set temp., or reselect when the set temp. varies

11.10 Force cooling function

11.10.1 Select forced cooling function with the forced cooling button or the switch.

11.10.2 The compressor is unconditionally turned on, after 30 minutes cooling operation whose fan mode is set as low, the A/C operates at the DRY mode with a set temp. of 24℃

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11.10.3 All protections of remote control cooling are available at forced cooling operation

11.10.4 Forced Auto function

Select forced auto function with the forced auto button or the switch.

In forced auto status the A/C operates at remote control mode with a set temp. of 24℃

11.11 Sleep mode

11.11.1 The sleep function is available at cooling, heating or auto mode

11.11.2 Cooling:

The set temperature rise 1℃ per hour . Two hours later, the set temperature will maintain as a constant and the fan speed is kept at

low speed.

The total time is 7 hours, after 7 hours the unit stops

11.11.3 Heating:

The set temperature decrease 1℃ per hour. Two hours later, the set temperature will m ai ntain as a constant and the air

circulation is kept at low speed (Cold air proof function takes precedence over all).

The total time is 7 hours, after 7 hours the unit stops

11.11.4 Auto:

After an hour running under economic mode, the set temp will rise 1℃,if it is under cooli ng mode; the set temp will decrease 1℃, if it is

under heating mode; the set temp will be changeless, if it is under fan-only mode; the condition will be the same after the air conditioner

running under economic mode after 2 hours, and during the next time the set temp do not change. The total time is 7 hours, after 7

hours the unit stops.

11.12 Auto restart function

In case of a sudden power failure, this function automatically sets the unit to previous settings before the power failure when

power returns

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12. Mode l and Parameters

Model MSQ-07CR MSQ-07HR MSQ-09CR MSQ-09HR MSQ-12CR MSQ-12HR I3SEC 8.5A 8.5A 10.0A 10.0A 11A 11A I5MIN 6.2A 6.2A 7.5A 7.5A 10A 10A

IFAN 5.2A 5.2A 6.2A 6.2A 8A 8A IRESTORE 4.2A 4.2A 5A 5A 6A 6A IDEFROST 3.2A 4.5A 5.5A

TE1 28 ℃ 28 ℃ 28 ℃ TE2 32 ℃ 32 ℃ 32 ℃ TE3 30 ℃ 30 ℃ 30 ℃ TE4 20℃ 20℃ 20℃ TE5 2℃ 2℃ 2℃ 2℃ 2℃ 2℃ TE6 7℃ 7℃ 7℃ 7℃ 7℃ 7℃ TE7 60 ℃ 60 ℃ 60 ℃ TE8 53 ℃ 53 ℃ 53 ℃ TE9 50 ℃ 50 ℃ 50 ℃

ANGLCOOL 200° 200° 200° 200° 200° 200°

ANGLHEAT 45° 45° 45°

ANGLOFF 132° 132° 132° 132° 132° 132°

TH

DEFROST

18 ℃ 18 ℃ 18 ℃

TM

DEFROST

19 ℃ 19 ℃ 19 ℃

TL

DEFROST

20 ℃ 20 ℃ 20 ℃

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13. Troubleshooting

13.1. For all cooling only model

Failure phenomenon

Operation lamp Timer lamp

Indoor fan speed has been out of control for over 1 minute

☆

X

Indoor room temp. or evaporator sensor i s open circ uit or

short circuit

☆

On

Over current protection of the

compressor occurs 4 times

X

☆

EEROM error

On

☆

No over-zero signal

☆ ☆

 Extinguish

☆ Flash at 5Hz

13.2. For all heat pump model

Failure phenomenon

Operation lamp Timer lamp Defrosting lamp

Over current protection of the

compressor occurs 4 times

☆

X

☆

Indoor fan speed has been out of control for over 1 minute

X

☆ ☆

No over-zero signal

☆ ☆ ☆

Temp. sensor on indoor evaporator is open circuit or short

circuit

X X

☆

Indoor room temp. sensor is open circuit or short circuit

X ☆ X

EEROM error

On ☆ X

 Extinguish ☆ Flash at 5Hz

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13.3. Diagnostic chart

After energizing, no indicator is lighted and the air conditioner can’t be operated.

After energizing, the air conditioner can not be operated.

Check if AC 220V power supply outputs to indoor PCB.

Check if AC 220V exists at the primary coil of transformer.

Yes

YES

No

Check if AC 14.5V exists at the secondary coil of transformer.

Indoor PCB is defective.

Take off the secondary plug of transformer, and then check if AC

14.5V exists at the secondary coil of transformer.

No

Yes

Indoor PCB is defective.

No

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13.4. Resetting phenomenon often occurs during operation. (That is automatically entering to the status when power is on.)

The reason is that the instantaneous voltage of main chip is less than 4.5V. Check accordi ng to the following procedure:

Resetting phenomenon often occurs during operation.

After changing indoor PCB, check if the failure realease.

Yes

After changing indoor fan motor, check if the failure realease.

Yes

YES

Yes

Power supply circuit has problems.

Indoor PCB is defective.

13.5. Operation lamp flashes and Timer lamp off.

Is connector connection good?

Is voltage being applied to the fan motor?

Fan motor is defective

Yes

No

Repair the connector.

No

Indoor PCB is defective.

13.6. Operation lamp flashes and Timer lamp on.

Is connector connection good?

Replace the sencor,

No

Repair the connector.

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13.7. Operation lamp off and Timer lamp flashes

Operation lamp off and Timer lamp flashes

The voltage of power supply is too low (less than 187V).

No

Indoor PCB is defective.

After changing the main control board, check if the failure realease.

Power supply fault.

No

Outdoor unit fault (such

as the compressor).

13.8. Operation lamp on and Timer lamp flashes EEROM error, indoor PCB is defective.

13.9. Operation lamp flashes, Timer lamp flashes .

This is alarm signal when the main chip can’t detect over-zero signal. When such failure occurs, the main control board must have

fault.

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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