Toshiba RAS-13SKV2-E, RAS-10SAV2-E, RAS-10SKV2-E, RAS-16SKV2-E, RAS-16SAV2-E INSTALLATION MANUAL

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Page 1

SERVICE MANUAL

Indoor Unit Outdoor Unit

FILE NO. SVM-10001

SPLIT TYPE

RAS-10SKV2-E RAS-10SAV2-E

RAS-13SKV2-E RAS-13SAV2-E RAS-16SKV2-E RAS-16SAV2-E

R410A

January, 2010

Page 2

FILE NO. SVM-10001

CONTENTS

1. SAFETY PRECAUTIONS .......................................................................... 3

2. SPECIFICATIONS ..................................................................................... 5

3. REFRIGERANT R410A ............................................................................. 8

4. CONSTRUCTION VIEWS ........................................................................ 16

5. WIRING DIAGRAM .................................................................................. 18

6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 20

7. REFRIGERANT CYCLE DIAGRAM ........................................................ 21

8. CONTROL BLOCK DIAGRAM ................................................................ 25

9. OPERATION DESCRIPTION................................................................... 28

10. INSTALLATION PROCEDURE ................................................................ 52

11. HOW TO DIAGNOSE THE TROUBLE...................................................... 66

12. HOW TO REPLACE THE MAIN PARTS................................................... 91

13. EXPLODED VIEWS AND PARTS LIST ................................................. 108

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FILE NO. SVM-10001

1. SAFETY PRECAUTIONS

For general public use

Power supply cord of outdoor unit shall be more than 1.5 mm2 (H07RN-F or 60245IEC66) polychloroprene sheathed flexible cord.

• Read this “SAFETY PRECAUTIONS” carefully before servicing.

• The precautions described below include the important items regarding safety. Observe them without fail.

• After the servicing work, perform a trial operation to check for any problem.

• Turn off the main power supply switch (or breaker) before the unit maintenance.

CAUTION

New Refrigerant Air Conditioner Installation

• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE LAYER.

R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with the adoption of the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during installation work, be sure that water , dust, former refrigerant, or refrigeration machine oil does not enter into the new type refrigerant R410A air conditioner circuit.

To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port on main unit and installation tools are different from those used for the conventional refrigerant units.

Accordingly, special tools are required for the new refrigerant (R410A) units . For connecting pipes, use new and clean piping materials with high pressure fittings made for R410A only, so that water and/or dust does not enter. Moreover, do not use the existing piping because there are some problems with pressure fittings and possible impurities in existing piping.

CAUTION

TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY

This appliance must be connected to the main power supply by a circuit breaker or a switch with a contact separation of at least 3 mm.

DANGER

• ASK AN AUTHORIZED DEALER OR QUALIFIED INSTALLATION PROFESSIONAL TO INSTALL/MAINTAIN THE AIR CONDITIONER.

INAPPROPRIATE SERVICING MAY RESULT IN WATER LEAKAGE, ELECTRIC SHOCK OR FIRE.

• TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE ALL POWER SWITCHES ARE OFF. FAILURE T O DO SO MAY CAUSE ELECTRIC SHOCK.

DANGER: HIGH VOLTAGE

The high voltage circuit is incorporated. Be careful to do the check service, as the electric shock may be caused in case of touching parts

on the P.C. board by hand.

• CORRECTLY CONNECT THE CONNECTING CABLE. IF THE CONNECTING CABLE IS INCORRECTLY CONNECTED, ELECTRIC PARTS MAY BE DAMAGED.

• CHECK THAT THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE SERVICE AND INSTALLA TION. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

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FILE NO. SVM-10001

• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

• TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT REGISTORS, FURNACE, STOVES , ETC.

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL NOT TO ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION CIRCUIT. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CIRCUIT WILL BECOME ABNORMALLY HIGH AND IT MAY RESULT IN THE PIPE BURSTING AND POSSIBLE PERSONNEL INJURIES.

• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE SERVICE WORK AND THE INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS IS HEATED, SUCH AS BY FIRE, GENERATION OF POISONOUS GAS MAY RESULT.

WARNING

• Never modify this unit by removing any of the safety guards or bypass any of the safety interlock switches.

• Do not install in a place which cannot bear the weight of the unit. Personal injury and property damage can result if the unit falls.

• After the installation work, confirm that refrigerant gas does not leak.

If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas may generate.

• The electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make sure the air conditioner uses an exclusive circuit.

An insufficient circuit capacity or inappropriate installation may cause fire.

• When wiring, use the specified cables and connect the terminals securely to prevent external forces applied to the cable from affecting the terminals.

• Be sure to provide grounding.

Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables.

• Conform to the regulations of the local electric company when wiring the power supply.

Inappropriate grounding may cause electric shock.

CAUTION

• Exposure of unit to water or other moisture before installation may result in an electrical short. Do not store in a wet basement or expose to rain or water.

• Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify the noise level of the unit or where noise or discharged air might disturb neighbors.

• To avoid personal injury, be careful when handling parts with sharp edges.

• Perform the specified installation work to guard against an earthquake.

If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

For Reference:

If a heating operation would be continuously perf ormed for a long time under the condition that the outdoor temperature is 0°C or lower, drainage of defrosted water may be difficult due to freezing of the bottom plate, resulting in a trouble of the cabinet or fan.

It is recommended to procure an antifreeze heater locally for a safe installation of the air conditioner. For details, contact the dealer.

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2-1. Specification

FILE NO. SVM-10001

2. SPECIFICATIONS

Unit model Indoor RAS-10SKV2-E RAS-13SKV2-E

Cooling capacity (kW) 2.5 3.5 Cooling capacity range (kW) 1.1-3.1 0.8-4.1 Heating capacity (kW) 3.2 4.2 Heating capacity range (kW) 0.9-4.8 0.9-5.6 Power supply Electric Indoor Operation mode Cooling Heating Cooling Heating characteristic Running current (A) 0.21-0.19 0.24-0.22 0.21-0.19 0.24-0.22

COP (Cooling / Heating) Operating Indoor High (Cooling / Heating) (dB-A) 38/39 39/40 noise Medium (Cooling / Heating) (dB-A) 33/34 33/34

Indoor unit Unit model RAS-10SKV2-E RAS-13SKV2-E

Outdoor unit Unit model RAS-10SAV2-E RAS-13SAV2-E

Piping Type Flare connection Flare connection

connection Indoor unit Liquid side (mm)

Refrigerant Name of refrigerant R410A R410A

Wiring Power supply

connection Interconnection

Usable temperature range Indoor (Cooling / Heating)

Accessory Indoor unit Installation plate 1 1

* The specification may be subject to change without notice for purpose of improvement.

Outdoor RAS-10SAV2-E RAS-13SAV2-E

1Ph/50Hz/220-240V , 1Ph/60Hz/220-230V

Power consumption (W) 35 40 35 40

Outdoor Operation mode Cooling Heating Cooling Heating

Outdoor (Cooling / Heating) (dB-A) 46/47 48/50

Dimension Height (mm) 275 275

Net weight (kg) 9 9 Fan motor output (W) 20 20 Air flow rate (Cooling / Heating)

Dimension Height (mm) 550 550

Net weigh (kg) 33 33

Compressor Motor output (W) 750 750

Fan motor output (W)

Air flow rate (Cooling / Heating)

Outdoor unit Liquid side (mm) ∅ 6.35 ∅ 6.35

Maximum length (m) 20 20

Maximum charge-less length (m) 15 15

Maximum height difference (m) 10 10

Weight (kg) 0.80 0.80

Outdoor unit Drain nipple 1 1

Power factor (%)7 766 76 76

Running current (A) 2.81-2.58 3.43-3.14 4.57-4.20 4.93-4.52 Power consumption (W) 563 710 965 1040 Power factor (%)9194 96 96 Starting current (A) 3.67 5.17

Low (Cooling / Heating) (dB-A) 26/28 26/28

Width (mm) 790 790 Depth (mm) 205 205

min)

Width (mm) 780 780

Depth (mm) 290 290

Type Single rotary type with DC-inverter variable speed control

Model DA89X1C-23FZ2

(m3 min)

Gas side (mm) ∅ 9.52 ∅ 9.52

Outdoor (Cooling / Heating)

Wireless remote controller 1 1

batteries 2 2

Remote controller holder 1 1 Pure Flow 2 2

Mounting screw

Pan head wood screw

Plasma air purifier - -

Installation manual 1 1

Owner's manual 1 1

Water proof rubber cap 2 2

∅ 6.35 ∅ 6.35

(

(oC)

4.18/4.27 3.50/3.89

8.6/9.5 9.5/10.4

30/30 37.5/37.5

3 Wires: Includes earth (Outdoor)

4 Wires: Includes earth

21-32/0-28 21-32/0-28

-10-46/-15-24 -10-46/-15-24

6 ( ∅ 4 x 25L) 6 ( ∅ 4 x 25L)

2 ( ∅ 3.1 x 16L) 2 ( ∅ 3.1 x 16L)

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2-2. Specification

FILE NO. SVM-10001

Unit model Indoor RAS-16SKV2-E

Cooling capacity (kW) 4.5 Cooling capacity range (kW) 0.8-5.0 Heating capacity (kW) 5.5 Heating capacity range (kW) 0.9-6.9 Power supply Electric Indoor Operation mode Cooling Heating characteristic Running current (A) 0.21-0.19 0.24-0.22

COP (Cooling / Heating) Operating Indoor High (Cooling / Heating) (dB-A) 45/45 noise Medium (Cooling / Heating) (dB-A) 40/40

Indoor unit Unit model RAS-16SKV2-E

Outdoor unit Unit model RAS-16SAV2-E

Piping Type Flare connection

connection Indoor unit Liquid side (mm)

Refrigerant Name of refrigerant R410A

Wiring Power supply

connection Interconnection

Usable temperature range Indoor (Cooling / Heating)

Accessory Indoor unit Installation plate 1

* The specification may be subject to change without notice for purpose of improvement.

Outdoor RAS-16SAV2-E

1Ph/50Hz/220-240V , 1Ph/60Hz/220-230V

Power consumption (W) 30 35

Outdoor Operation mode Cooling Heating

Outdoor (Cooling / Heating) (dB-A)

Dimension Height (mm) 275

Net weight (kg) 9 Fan motor output (W) 30 Air flow rate (Cooling / Heating)

Dimension Height (mm) 550

Net weicht (kg) 39

Compressor Motor output (W) 750

Fan motor output (W)

Air flow rate (Cooling / Heating)

Outdoor unit Liquid side (mm)

Maximum length (m) 20

Maximum charge-less length (m) 15

Maximum height difference (m) 10

Weight (kg) 1.10

Outdoor unit Drain nipple 1

Power factor (%) 65 66

Running current (A) 6.26-5.74 6.81-6.24 Power consumption (W) 1365 1485 Power factor (%) 99 99 Starting current (A) 7.05

Low (Cooling / Heating) (dB-A) 30/31

Width (mm) 790 Depth (mm) 205

min)

Width (mm) 780

Depth (mm) 290

Type Twin rotary type with DC-inverter variable speed control

Model DA111A1F-20F1

(m3 min)

Gas side (mm)

Outdoor (Cooling / Heating)

Wireless remote controller 1

batteries 2

Remote controller holder 1 Pure Flow 2

Mounting screw

Pan head wood screw

Plasma air purifier -

Installation manual 1

Owner's manual 1

Water proof rubber cap 2

(

(oC)

∅ 6.35

∅12.7

∅ 6.35

∅12.7

3 Wires: Includes earth (Outdoor)

21-32/0-28

-10-46/-15-24

6 (∅ 4 x 25L)

2 (∅ 3.1 x 16L)

3.23/3.62

49/50

11.4/12.3

36/32

4 Wires: Includes earth

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2-3. Operation Characteristic Curve

FILE NO. SVM-10001

RAS-16SKV2-E

RAS-13SKV2-E

Current (A)

RAS-10SKV2-E

Conditions

Indoor : DB 27

Outdoor : DB 35 Air Flow : High Pip Length : 5m Voltage : 230V

0 10 20 30 40 50 60 70 80 90 100 110 120

Compressor Speed (rps)

C/WB 19oC

RAS-16SKV2-E

RAS-10SKV2-E

RAS-13SKV2-E

Current (A)

Conditions

Indoor : DB 20

Outdoor : DB 7 Air Flow : High Pip Length : 5m Voltage : 230V

C/WB 6oC

0 102030405060708090100110120

Compressor Speed (rps)

2-4. Capacity Variation Ratio According to Temperature

105

100

Capacity ratio (%)

Capacity ratio:100%=

2.5kW(RAS-10SKV2-E)

3.5KW(RAS-13SKV2-E)

4.5kW(RAS-16SKV2-E)

32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

Outdoor temp. (℃)

RAS-10SKV2-E RAS-13SKV2-E RAS-16SKV2-E

Conditions Indoor:DB27℃/WB19℃ Indoor air flow:High Pipe length:5m

Voltage : 230V

120

100

RAS-10SKV2-E

Heating Capacity ratio (%)

-15 -10 -5 0 5 10

RAS-13SKV2-E RAS-16SKV2-E

Capacity ratio:100%=

W(RAS-10SKV2-E)

3.2k

4.2KW(RAS-13SKV2-E)

5.5kW(RAS-16SKV2-E)

Condition Indoor:DB20℃ Indoor air flow:High Pipe length:5m

Voltage : 230V

Outdoor temp. (℃)

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3. REFRIGERANT R410A

FILE NO. SVM-10001

This air conditioner adopts the new refrigerant HFC (R410A) which does not damage the ozone layer.

The working pressure of the new refrigerant R410A is 1.6 times higher than conventional refrigerant (R22). The refrigerating oil is also changed in accordance with change of refrigerant, so be careful that water , dust, and existing refrigerant or refrigerating oil are not entered in the refrigerant cycle of the air conditioner using the new refrigerant during installation work or servicing time.

The next section describes the precautions for air conditioner using the new refrigerant. Conforming to contents of the next section together with the general cautions included in this manual, perform the correct and safe work.

3-1. Safety During Installation/Servicing

As R410A’s pressure is about 1.6 times higher than that of R22, improper installation/servicing may cause a serious trouble. By using tools and materials exclusive for R410A, it is necessary to carry out installation/servicing safely while taking the following precautions into consideration.

1. Never use refrigerant other than R410A in an air conditioner which is designed to operate with R410A.

If other refrigerant than R410A is mixed, pressure in the refrigeration cycle becomes abnormally high, and it may cause personal injury, etc. by a rupture.

2. Confirm the used refrigerant name, and use tools and materials exclusive for the refrigerant R410A.

The refrigerant name R410A is indicated on the visible place of the outdoor unit of the air conditioner using R410A as refrigerant. To prevent mischarging, the diameter of the service port differs from that of R22.

3. If a refrigeration gas leakage occurs during installation/servicing, be sure to ventilate fully.

If the refrigerant gas comes into contact with fire, a poisonous gas may occur.

4. When installing or removing an air conditioner, do not allow air or moisture to remain in the refrigeration cycle. Otherwise, pressure in the refrigeration cycle may become abnormally high so that a rupture or personal injury may be caused.

5. After completion of installation work, check to make sure that there is no refrigeration gas leakage.

If the refrigerant gas leaks into the room, coming into contact with fire in the fan-driven heater, space heater, etc., a poisonous gas may occur.

6. When an air conditioning system charged with a large volume of refrigerant is installed in a small room, it is necessary to exercise care so that, even when refrigerant leaks, its concentration does not exceed the marginal le vel.

If the refrigerant gas leakage occurs and its concentration exceeds the marginal le vel, an oxygen starvation accident may result.

7. Be sure to carry out installation or removal according to the installation manual.

Improper installation may cause refrigeration trouble, water leakage , electric shock, fire, etc.

8. Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a qualified air conditioner technician or electrician.

Improper repair’s may result in water leakage, electric shock and fire, etc.

3-2. Refrigerant Piping Installation

3-2-1. Piping Materials and Joints Used

For the refrigerant piping installation, copper pipes and joints are mainly used. Copper pipes and joints suitable for the refrigerant m ust be chosen and installed. Furthermore, it is necessary to use clean copper pipes and joints whose interior surfaces are less affected by contaminants .

1. Copper Pipes

It is necessary to use seamless copper pipes which are made of either copper or copper alloy and it is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface).

Otherwise, the expansion valve or capillary tube may become blocked with contaminants.

As an air conditioner using R410A incurs pressure higher than when using R22, it is necessary to choose adequate materials.

Thicknesses of copper pipes used with R410A are as shown in Table 3-2-1. Never use copper pipes thinner than 0.8 mm even when it is available on the market.

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Page 9

Table 3-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

FILE NO. SVM-10001

Nominal diameter

1/4 3/8 1/2 5/8

Outer diameter (mm)

6.35

9.52

12.70

15.88

R410A R22

0.80 0.80

1.00 1.00

2. Joints

For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare Joints

Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used.

Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 3-2-3 to 3-2-6 below.

b) Socket Joints

Socket joints are such that they are brazed for connections, and used mainly for thick pipings whose diameter is larger than 20 mm.

Thicknesses of sock et joints are as shown in Table 3-2-2.

Table 3-2-2 Minimum thicknesses of socket joints

Nominal diameter

1/4 3/8 1/2 5/8

Reference outer diameter of

copper pipe jointed (mm)

6.35

9.52

12.70

15.88

Minimum joint thickness

(mm)

0.50

0.60

0.70

0.80

3-2-2. Processing of Piping Materials

When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not enter the pipe interior, that no other oil than lubricating oils used in the installed air-water heat pump is used, and that refrigerant does not leak. When using lubricating oils in the piping processing, use such lubricating oils whose water content has been removed. When stored, be sure to seal the container with an airtight cap or any other cover.

1. Flare processing procedures and precautions

a) Cutting the Pipe

By means of a pipe cutter, slowly cut the pipe so that it is not deformed.

b) Removing Burrs and Chips

If the flared section has chips or burrs, refrigerant leakage ma y occur. Carefully remove all burrs and clean the cut surface before installation.

c) Insertion of Flare Nut

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Page 10

d) Flare Processing

Make certain that a clamp bar and copper pipe have been cleaned.

By means of the clamp bar, perform the flare processing correctly.

Use either a flare tool for R410A or conventional flare tool.

Flare processing dimensions differ according to the type of flare tool. When using a conventional flare tool, be sure to secure “dimen- sion A” by using a gauge for size adjustment.

Table 3-2-3 Dimensions related to flare processing for R410A

Nominal

diameter

Outer

diameter

(mm)

Thickness

(mm)

Fig. 3-2-1 Flare pr ocessing dimensions

Flare tool for R410A

clutch type

FILE NO. SVM-10001

ØD

A (mm)

Conventional flare tool

Clutch type Wing nut type

1/4 3/8 1/2 5/8

Nominal

diameter

1/4 3/8 1/2 5/8

6.35

9.52

12.70

15.88

Table 3-2-4 Dimensions related to flare processing for R22

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

0.8

1.0

Thickness

(mm)

0.8

1.0

0 to 0.5 0 to 0.5 0 to 0.5 0 to 0.5

Flare tool for R22

clutch type

0 to 0.5 0 to 0.5 0 to 0.5 0 to 0.5

1.0 to 1.5 1.5 to 2.0

1.0 to 1.5 2.0 to 2.5

A (mm)

Conventional flare tool

Clutch type Wing nut type

0.5 to 1.0 1.0 to 1.5

0.5 to 1.0 1.5 to 2.0

Nominal

diameter

1/4 3/8 1/2 5/8

Table 3-2-5 Flare and flare nut dimensions for R410A

Outer diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

1.0

Dimension (mm)

ABCD

9.1 9.2 6.5 13

13.2 13.5 9.7 20

16.6 16.0 12.9 23

19.7 19.0 16.0 25

– 10 –

Flare nut width

(mm)

17 22 26 29

Page 11

Table 3-2-6 Flare and flare nut dimensions for R22

FILE NO. SVM-10001

Nominal

diameter

1/4 3/8 1/2 5/8 3/4

Outer diameter

(mm)

6.35

9.52

12.70

15.88

19.05

45˚ to 46˚

Thickness

(mm)

0.8

1.0

B A

Dimension (mm)

ABCD

9.0 9.2 6.5 13

13.0 13.5 9.7 20

16.2 16.0 12.9 20

19.7 19.0 16.0 23

23.3 24.0 19.2 34

43˚ to 45˚

Flare nut width

(mm)

17 22 24 27 36

Fig. 3-2-2 Relations between flare nut and flare seal surface

2. Flare Connecting Procedures and Precautions

a) Make sure that the flare and union portions do not have any scar or dust, etc. b) Correctly align the processed flare surface with the union axis. c) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R410A is

the same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur. When it is strong, the flare nut may crack and may be made non-removable. When choosing the tighten-

ing torque, comply with values designated by man ufacturers. Table 3-2-7 shows reference values.

NOTE :

When applying oil to the flare surface, be sure to use oil designated by the manufacturer. If any other oil is used, the lubricating oils may deteriorate and cause the compressor to burn out.

Table 3-2-7 Tightening torque of flare for R410A [Reference values]

Nominal

diameter

Outer diameter

(mm)

Tightening torque

N•m (kgf•cm)

Tightening torque of torque

wrenches available on the market

N•m (kgf•cm)

1/4 3/8 1/2 5/8

6.35

9.52

12.70

15.88

14 to 18 (140 to 180) 33 to 42 (330 to 420) 50 to 62 (500 to 620) 63 to 77 (630 to 770)

– 11 –

16 (160), 18 (180)

42 (420) 55 (550) 65 (650)

Page 12

FILE NO. SVM-10001

3-3. Tools

3-3-1. Required T ools

The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is changed to prev ent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.

The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge , clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.

1. Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))

2. Tools exclusiv e for R410A, but can be also used for con ventional refrigerant (R22)

3. Tools commonly used for R410A and for conventional refrigerant (R22) The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)

Tools whose specifications are changed for R410A and their interchangeability

air-water heat pump installation

No.

4 5 6

7 8

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection

(Note 2) Charging cylinder for R410A is being currently developed.

Used tool

Flare tool Copper pipe gauge for

adjusting projection margin

Torque wrench (For Ø12.7)

Gauge manifold Charge hose Vacuum pump adapter

Electronic balance for refrigerant charging

Refrigerant cylinder Leakage detector Charging cylinder

margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

Pipe flaring Flaring by

conventional flare tool

Connection of flare nut

Evacuating, refrigerant charge, run check, etc.

Vacuum evacuating Refrigerant charge Refrigerant charge

Gas leakage check Refrigerant charge

Usage

Existence of new equipment for R410A

Yes

Yes Yes Yes

Yes

(Note 2)

R410A

Whether conventional equipment can be used

*(Note 1)

× ×

× × ×

× ×

Conventional air-water heat pump installation

Whether new equipment can be used with conventional refrigerant

*(Note 1)

× ×

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary as the general tools.

1. Vacuum pump Use vacuum pump by attaching vacuum pump adapter.

2. Torque wrench (For Ø6.35, Ø9.52)

3. Pipe cutter

4. Reamer

5. Pipe bender

6. Level vial

7. Screwdriver (+, –)

8. Spanner or Monkey wrench

9. Hole core drill (Ø65)

10. Hexagon wrench (Opposite side 4mm)

11 . Tape measure

12. Metal saw

Also prepare the following equipments for other installation method and run check.

1. Clamp meter

2. Thermometer

3. Insulation resistance tester

4. Electroscope

– 12 –

Page 13

FILE NO. SVM-10001

3-4. Recharging of Refrigerant

When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the following steps .

Recover the refrigerant, and check no refrigerant remains in the equipment.

Connect the charge hose to packed valve service port at the outdoor unit’s gas side.

Connect the charge hose to the vacuum pump adapter.

Open fully both packed valves at liquid and gas sides.

When the compound gauge’s pointer has indicated –0.1 Mpa (–76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump’s power switch.

Keep the status as it is for 1 to 2 minutes, and ensure that the compound gauge’s pointer does not return.

Set the refrigerant cylinder to the electronic balance, connect the connecting hose to the cylinder and the connecting port of the electronic balance, and charge liquid refrigerant.

Place the handle of the gauge manifold Low in the fully opened position, and turn on the vacuum pump’s power switch. Then, evacuating the refrigerant in the cycle.

(For refrigerant charging, see the figure below.)

1. Never charge refrigerant exceeding the specified amount.

2. If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.

3. Do not carry out additional charging. When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the

refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high pressure, and may cause a rupture or personal injury.

(Indoor unit)

Opened

(Outdoor unit)

Refrigerant cylinder

(with siphon)

Check valve

Opened Open/close valve for charging

Electronic balance for refrigerant charging

Fig. 3-4-1 Configuration of refrigerant charging

Opened

Closed

Service port

– 13 –

Page 14

FILE NO. SVM-10001

1. Be sure to make setting so that liquid can be charged.

2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.

It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant. Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the cylinder upside down if cylinder is not equipped with siphon.

[ Cylinder with siphon ] [ Cylinder without siphon ]

Refrigerant

cylinder

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Gauge manifold

OUTDOOR unit

Electronic

balance

R410A refrigerant is HFC mixed refrigerant. Therefore, if it is charged with gas, the composition of the charged refrigerant changes and the characteristics of the equipment varies.

3-5. Brazing of Pipes

3-5-1. Materials for Brazing

1. Silver brazing filler

Silver brazing filler is an alloy mainly composed of silver and copper. It is used to join iron, copper or copper alloy, and is relatively expensive though it excels in solderability.

2. Phosphor bronze brazing filler

Phosphor bronze brazing filler is generally used to join copper or copper alloy.

Electronic

balance

Siphon

Fig. 3-4-2

1. Phosphor bronze brazing filler tends to react with sulfur and produce a fragile compound water solution, which may cause a gas leakage. Therefore, use any other type of brazing filler at a hot spring resort, etc., and coat the surface with a paint.

2. When performing brazing again at time of servicing, use the same type of brazing filler.

3-5-2. Flux

3. Low temperature brazing filler

Low temperature brazing filler is generally called solder, and is an alloy of tin and lead. Since it is weak in adhesive strength, do not use it for refrigerant pipes.

1. Reason why flux is necessary

• By removing the oxide film and any foreign matter on the metal surface, it assists the flow of brazing filler .

• In the brazing process, it prevents the metal surface from being oxidized.

• By reducing the brazing filler’s surface tension, the brazing filler adheres better to the treated metal.

– 14 –

Page 15

2. Characteristics required for flux

• Activated temperature of flux coincides with the brazing temperature.

• Due to a wide effective temperature range, flux is hard to carbonize.

• It is easy to remove slag after brazing.

• The corrosive action to the treated metal and

brazing filler is minimum.

• It excels in coating performance and is harmless to the human body.

As the flux works in a complicated manner as described above, it is necessary to select an adequate type of flux according to the type and shape of treated metal, type of brazing filler and brazing method, etc.

3. Types of flux

• Noncorrosive flux

Generally, it is a compound of borax and boric acid. It is effective in case where the brazing temperature is higher than 800°C.

• Activated flux

Most of fluxes generally used for silver brazing are this type. It features an increased o xide film removing capability due to the addition of compounds such as potassium fluoride, potassium chloride and sodium fluoride to the borax-boric acid compound.

4. Piping materials for brazing and used brazing filler/flux

FILE NO. SVM-10001

3-5-3. Brazing

As brazing work requires sophisticated techniques, experiences based upon a theoretical knowledge, it must be performed by a person qualified.

In order to prev ent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting dry Nitrogen gas (N2) flow.

Never use gas other than Nitrogen gas.

1. Brazing method to prevent oxidation

1) Attach a reducing valve and a flow-meter to the Nitrogen gas cylinder.

2) Use a copper pipe to direct the piping material, and attach a flow-meter to the cylinder.

3) Apply a seal onto the clearance between the piping material and inserted copper pipe for Nitrogen in order to prevent backflow of the Nitrogen gas.

4) When the Nitrogen gas is flowing, be sure to keep the piping end open.

5) Adjust the flow rate of Nitrogen gas so that it is lower than 0.05 m3/Hr or 0.02 MPa (0.2kgf/cm2) by means of the reducing valve.

6) After performing the steps above, keep the Nitrogen gas flowing until the pipe cools down to a certain extent (temperature at which pipes are touchable with hands).

7) Remove the flux completely after brazing.

Piping material

Copper - Copper

Copper - Iron

Iron - Iron

Used brazing filler

Phosphor copper

Silver Silver

Used flux

Do not use

Paste flux Vapor flux

1. Do not enter flux into the refrigeration cycle.

2. When chlorine contained in the flux remains within the pipe, the lubricating oil deteriorates. Therefore, use a flux which does not contain chlorine.

3. When adding water to the flux, use water which does not contain chlorine (e.g. distilled water or ion-exchange water).

4. Remove the flux after brazing.

Flow meter

Stop valve

Nitrogen gas

cylinder

From Nitrogen cylinder

Pipe

Nitrogen gas

Rubber plug

Fig. 3-5-1 Prevention of oxidation during brazing

– 15 –

Page 16

4-1. Indoor Unit

4. CONSTRUCTION VIEWS

790

FILE NO. SVM-10001

Front panel

Knock out system

275

Air filter

116

Heat exchanger

Installation plate hanger

Air inlet

62 69

193480

205

Knock out system

Wireless remote controller

157

Installation plate hanger

Connecting pipe (0.35m)

(For 10,13 series; Flare

(For 16 series; Flare

84.5

Minimum

distance

to wall

275

170 or more

84.5 150 84.5

9.52mm)

12.7mm)

Hanger

621

235

215

Minimum

Hanger

distance

to ceiling

160.5 160.5 150

Center line

Drain hose (0.50m)

Connecting pipe (0.40m)

(Flare 6.35mm)

235

215

65 or more

Hanger

Installation plate outline

84.5

Minimum

distance

to wall

170 or more

Remote controller holder

190

125

– 16 –

Page 17

4-2. Outdoor Unit

FILE NO. SVM-10001

108 125

600

320

306

R5.5

6 hole

A detail Drawing (Back leg)

290

320

FAN-GUARD

436

550

275

25 Drain outlet

11 x 14

(For 8 -

Hole

10 anchor bolt)

306

320

6 hole

11x14 hole

36 50

B Detail Drawing (Front leg)

COVER-PV

9060090

320

342

100 or more

320

100 or more

Air outlel

Z View

600

Air intlel

600 or more

Service port

137

2 - R5-5 x 17L Ushape

(For ∅ 8 - ∅10 anchor bolt)

600 or more

2 - ∅11 x 14 Long holes (For ∅8 - ∅10 anchor bolt)

Electrical part cover

Liquid side (Flare 6.35)

Gas side (10,13

: Flare ∅9.52)

(16

: Flare ∅12..7)

Installation dimension

– 17 –

Page 18

5. WIRING DIAGRAM

FILE NO. SVM-10001

5-1. RAS-10SKV2-E / RAS-10SAV2-E, RAS-13SKV2-E / RAS-13SAV2-E

RELAY

COIL FOR 4WAY VALVE

1 2 3 4 5 6 7 8

9 10 11

YEL

– 18 –

Page 19

5-2. RAS-16SKV2-E / RAS-16SAV2-E

FILE NO. SVM-10001

Fuse F01

T3.15A 250VAC

– 19 –

Page 20

FILE NO. SVM-10001

6. SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

No. Parts name Type Specifications

Fan motor

(for indoor)

2 Room temp. sensor (TA-sensor) ( - ) 10kΩ at 25°C

3 Heat exchanger temp. sensor (TC-sensor) ( - ) 10kΩ at 25°C

4 Louver motor MP24Z3T Output (Rated) 1W, 16 poles, DC12V

RAS-10,13SKV2-E AFN-220-20-4D AC 240V, 20W RAS-16SKV2-E ICF-340-30-4 DC 340V, 30W

6-2. Outdoor Unit

No. Parts name Type Specifications

Reactor

2 Outdoor fan motor ICF-140-43-4R DC140V, 43W

3 Suction temp. sensor (TS sensor) (Inverter attached) 10kΩ (25°C)

4 Discharge temp. sensor (TD sensor) (Inverter attached) 62kΩ (20°C)

5 Outside air temp. sensor (TO sensor) (Inverter attached) 10kΩ (25°C)

6 Heat exchanger temp. sensor (TE sensor) (Inverter attached) 10kΩ (25°C)

Terminal block (5P)7

Compressor

COIL FOR P.M.V.

Coil for 4-way valve

RAS-16SAV2-E CH-57 L = 10mH, 16A RAS-10,13SAV2-E CH-69 L = 19mH, 10A

RAS-10,13SAV2-E DA89X1C-23FZ2

RAS-16SAV2-E DA111A1F-20F1

CAM-MD12TCTH-2

STF

20A, AC250V

3-phases 4-poles 750W

DC12V

AC220-240V

– 20 –

Page 21

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-10SKV2-E / RAS-10SAV2-E

INDOOR UNIT

Indoor heat

exchanger

Temp. measurement

FILE NO. SVM-10001

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe Outer dia. : 9.52mm Thickness : 0.8mm

4-way valve

Muffler

Compressor DA89X1C-23FZ2

Outdoor heat

exchanger

Cross flow fan

Deoxidized copper pipe Outer dia. : 6.35mm Thickness : 0.8mm

Sectional shape of heat insulator

Allowable height

difference : 10m

Strainer

Pulse Modulating valve at liquid side

Strainer

Max. : 20m

Min. : 2m Chargeless : 15m

Charge : 20g/m (16 to 20m)

Allowable pipe length

Temp. measurement

Propeller fan

OUTDOOR UNIT

NOTE :

Refrigerant amount : 0.80kg

Gas leak check position Refrigerant flow (Cooling) Refrigerant flow (Heating)

NOTE :

• The maximum pipe length of this air conditioner is 20 m. When the pipe length exceeds 15m, the additional

charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 100g)

– 21 –

Page 22

RAS-13SKV2-E / RAS-13SAV2-E

INDOOR UNIT

Indoor heat

exchanger

Temp. measurement

FILE NO. SVM-10001

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe Outer dia. : 9.52mm Thickness : 0.8mm

4-way valve

Muffler

Compressor DA89X1C-23FZ2

Outdoor heat

exchanger

Cross flow fan

Deoxidized copper pipe Outer dia. : 6.35mm Thickness : 0.8mm

Sectional shape of heat insulator

Allowable height

difference : 10m

Strainer

Pulse Modulating valve at liquid side

Max. : 20m

Min. : 2m Chargeless : 15m

Charge : 20g/m (16 to 20m)

Allowable pipe length

Temp. measurement

Propeller fan

OUTDOOR UNIT

NOTE :

Refrigerant amount : 0.80kg

Gas leak check position Refrigerant flow (Cooling) Refrigerant flow (Heating)

NOTE :

• The maximum pipe length of this air conditioner is 20 m. When the pipe length exceeds 15m, the additional

charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 100g)

– 22 –

Page 23

RAS-16SKV2-E / RAS-16SAV2-E

INDOOR UNIT

Indoor heat

exchanger

Temp. measurement

FILE NO. SVM-10001

Pressure measurement Gauge attaching port

Vacuum pump connecting port Deoxidized copper pipe

Outer dia. : 12.7mm(16)

Thickness : 0.8mm

4-way valve

Muffler

Compressor DA111A1F-20F1

Outdoor heat

exchanger

Cross flow fan

Deoxidized copper pipe Outer dia. : 6.35mm Thickness : 0.8mm

Sectional shape of heat insulator

Split capillary

Ø1.2 x 80

Allowable height

difference : 10m

Strainer

Pulse Modulating valve at liquid side

Max. : 20m

Min. : 2m Chargeless : 15m

Charge : 20g/m (16 to 20m)

Allowable pipe length

Temp. measurement

Propeller fan

OUTDOOR UNIT

Ø1.2 x 80

NOTE :

Refrigerant amount : 1.10kg

Gas leak check position Refrigerant flow (Cooling) Refrigerant flow (Heating)

NOTE :

• The maximum pipe length of this air conditioner is 15 m. When the pipe length exceeds 15m, the additional

charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 100g)

– 23 –

Page 24

7-2. Operation Data

FILE NO. SVM-10001

Tempeature Heat exchanger

condition(°C)

Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps)

27/19 35/- 10SKV2-E 0.9 to 1.1 12 to 14 37 to 39 High High 49

Model name Standard Indoor Outdoor Compressor RAS- pressure fan mode fan mode revolution

13SKV2 -E 0.8 to 1.0 11 to 13 46 to 48 High High 75 16SKV2 -E 0.8 to 1.0 11 to 13 40 to 42 High High 83

pipe temp.

Tempeature Heat exchanger

condition(°C)

Indoor Outdoor P (MPa) T1 (°C) T2 (°C) (rps)

20/- 7/6 10SKV2-E 2.5 to 2.7 39 to 41 0 to 3 High High 60

Model name Standard Indoor Outdoor Compressor RAS- pressure fan mode fan mode revolution

13SKV2 -E 2.6 to 2.8 41 to 43 0 to 2 High High 80 16SKV2 -E 2.7 to 2.9 43 to 45 0 to 2 High High 83

pipe temp.

NOTES :

1. Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent. (Thermistor themometer)

2. Connecting piping condition : 5 m

– 24 –

Page 25

8-1. Indoor Unit

RAS-10SKV2-E, RAS-13SKV2-E

FILE NO. SVM-10001

8. CONTROL BLOCK DIAGRAM

Heat Exchanger Sensor (Tc)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Converter

(D.C circuit)

Noise Filter

M.C.U.

Functions

• Cold draft preventing Function

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

• Clean Function

Serial Signal Transmitter/Receiver

Indoor Unit Control Unit

Louver

Motor

Louver Motor

Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

From Outdoor Unit

220-240V

50Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation [ ]

Operation Mode Selection

AUTO, COOL, DRY, HEAT

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Infrared Rays, 36.7kHz

COMFORT SLEEP

QUIET

– 25 –

Page 26

RAS-16SKV2-E

FILE NO. SVM-10001

Heat Exchanger Sensor (TC)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Converter

(D.C circuit)

Noise Filter

M.C.U.

Functions

• Cold draft preventing Function

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

• Clean Function

Serial Signal Transmitter/Receiver

Indoor Unit Control Unit

Louver

Motor

Louver Motor

Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

From Outdoor Unit

220-240V

50Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation [ ]

Operation Mode Selection

AUTO, COOL, DRY, HEAT

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Infrared Rays, 36.7kHz

COMFORT SLEEP

QUIET

– 26 −

Page 27

8-2. Outdoor Unit (Inverter Assembly)

detect

Current

circuit

Gate drive

detect

Current

FILE NO. SVM-10001

Compressor

Outdoor

Fan motor

Inverter

(DC → AC)

P.M.V. : Pulse Motor Valve

M.C.U. : Micro Control Unit

MICRO-COMPUTER BLOCK DIAGRAM

M.C.U

MCC5009 (P.C.B) OUTDOOR UNIT

• PWM synthesis function

• Input current release control

circuit

Indoor unit

send/receive

circuit

Gate drive

• IGBT over-current detect control

• Outdoor fan control

• High power factor correction control

• Inverter output frequency control

• A/D converter function

• P.M.V. control

• Discharge temp. control

• 4-way valve control

• Signal communication to indoor unit

4MHz

Clock

frequency

circuit

High Power

factor Correction

Converter

(AC → DC)

sensor

Input current

Filter

Noise

Inverter

(DC → AC)

Relay

circuit

of P.M.V.

Driver circuit

valve

4-way

P.M.V.

220–240 V ~50Hz

For INDOOR UNIT

Discharge

temp. sensor

Outdoor air

temp. sensor

Suction temp.

– 27 –

sensor

Heat exchanger

temp.sensor

Page 28

9. OPERATION DESCRIPTION

FILE NO. SVM-10001

9-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air conditioner, which uses AC or DC motor for the indoor for motor and the outdoor fan motor. And the capacityproportional control compressor which can change the motor speed in the range from 11 to 96 rps is mounted. The DC motor drive circuit is mounted to the indoor unit. The compressor and the inverter to control fan motor are mounted to the outdoor unit.

The entire air conditioner is mainly controlled by the indoor unit controller.

The indoor unit controller drives the indoor fan motor based upon command sent from the remote controller, and transfers the operation command to the outdoor unit controller.

The outdoor unit controller receives operation command from the indoor unit side, and controls the outdoor fan and the pulse Modulating valve. (P.M.V) Besides, detecting revolution position of the compressor motor, the outdoor unit controller controls speed of the compressor motor by controlling output voltage of the inverter and switching timing of the supply power (current transfer timing) so that motors drive according to the operation command. And then, the outdoor unit controller transfers reversely the operating status information of the outdoor unit to control the indoor unit controller.

As the compressor adopts four-pole brushless DC motor, the frequency of the supply power from inverter to compressor is two-times cycles of the actual number of revolution.

1. Role of indoor unit controller

The indoor unit controller judges the operation commands from the remote controller and assumes the following functions.

• Judgment of suction air temperature of the indoor heat exchanger by using the indoor temp. sensor. (TA sensor)

• Judgment of the indoor heat exchanger temperature by using heat exchanger sensor (TC sensor) (Prevent-freezing control, etc.)

• Louver motor control

• Indoor fan motor operation control

• LED (Light Emitting Diode) display control

• Transferring of operation command signal (Serial

signal) to the outdoor unit

• Reception of information of operation status (Serial signal including outside temp. data) to the outdoor unit and judgment/display of error

• Air purifier operation control

2. Role of outdoor unit controller

Receiving the operation command signal (Serial signal) from the indoor unit controller, the outdoor unit performs its role.

• Compressor operation control

• Operation control of outdoor fan motor

• P.M.V. control

• 4-way valve control



Operations follow ed to judgment



of serial signal from indoor side.



• Detection of inverter input current and current release operation

• Over-current detection and prevention operation to IGBT module (Compressor stop function)

• Compressor and outdoor fan stop function when serial signal is off (when the serial signal does not reach the board assembly of outdoor control by trouble of the signal system)

• Transferring of operation information (Serial signal) from outdoor unit controller to indoor unit controller

• Detection of outdoor temperature and operation revolution control

• Defrost control in heating operation (Temp. measurement by outdoor heat exchanger and control for 4-way valve and outdoor fan)

3. Contents of operation command signal (Serial signal) from indoor unit controller to outdoor unit controller

The following three types of signals are sent from the indoor unit controller.

• Operation mode set on the remote controller

• Compressor revolution command signal defined

by indoor temperature and set temperature (Correction along with variation of room temperature and correction of indoor heat exchanger temperature are added.)

• Temperature of indoor heat exchanger

• For these signals ([Operation mode] and [Com-

pressor revolution] indoor heat exchanger temperature), the outdoor unit controller monitors the input current to the inverter, and performs the followed operation within the range that current does not exceed the allowable value.

4. Contents of operation command signal (Serial signal) from outdoor unit controller to indoor unit controller

The following signals are sent from the outdoor unit controller.

• The current operation mode

• The current compressor revolution

• Outdoor temperature

• Existence of protective circuit operation

For transferring of these signals, the indoor unit controller monitors the contents of signals, and judges existence of trouble occurrence.

Contents of judgment are described below.

• Whether distinction of the current operation status meets to the operation command signal

• Whether protective circuit operates When no signal is received from the outdoor

unit controller, it is assumed as a trouble.

– 28 –

Page 29

FILE NO. SVM-10001

9-2. Operation Description

1. Basic operation ........................................................................................................... 30

1. Operation control ................................................................................................... 30

2. Cooling/Heating operation ..................................................................................... 31

3. AUTO operation .....................................................................................................

4. DRY operation........................................................................................................ 31

2. Indoor fan motor control ............................................................................................. 32

3. Outdoor fan motor control........................................................................................... 34

4. Capacity control .......................................................................................................... 35

5. Current release control ............................................................................................... 35

6. Release protective control by temperature of indoor heat exchanger........................ 36

7. Defrost control (Only in heating operation) ................................................................ 37

8. Louver control ............................................................................................................. 38

1) Louver position....................................................................................................... 38

2) Air direction adjustment ......................................................................................... 38

3) Swing ..................................................................................................................... 38

9. ECO operation ............................................................................................................ 39

10. Temporary operation................................................................................................... 40

11.

Discharge temperature control ................................................................................... 40

12.

Pulse Modulating valve (P.M.V.) control ..................................................................... 41

13.

Self-Cleaning function ................................................................................................ 42

14.

Remote-A or B selection ............................................................................................ 43

15.

QUIET mode ............................................................................................................. 44

COMFORT SLEEP mode ......................................................................................... 44

16.

17.

One-Touch Comfort .................................................................................................. 44

18.

Hi-POWER Mode ...................................................................................................... 45

19. FIL

TER Indicator ...............................................................................................45

9-3. Auto Restart Function ..

9-3-1. How to Set the A uto Restart Function .............................. ........................................ 46

9-3-2. How to Cancel the Au to Restar t Function ................................................................. 47

9-3-3. Power Failure During Timer Operation .................................................................... 47

9-4. Remote Controller and Its Fuctions

9-4-1. Parts Name of Remote Contr oller .............................................................................. 48

9-4-2. Operation of remote control ...................................................................................... 48

9-4-3. Name and Functions of Indications on Remote Contr oller ........................................ 51

– 29 −

Page 30

FILE NO. SVM-10001

Item

1. Basic operation

Operation flow and applicable data, etc.

1. Operation control

Receiving the user’s operation condition setup, the operation statuses of indoor/outdoor units are controlled.

1) The operation conditions are selected by the remote controller as shown in the below.

2) A signal is sent by ON button of the remote controller.

3) The signal is received by a sensor of the indoor unit and processed by the indoor controllers as shown in the below.

4) The indoor controller controls the indoor fan motor and louver motor.

5) The indoor controller sends the operation command to the outdoor controller, and sends/receives the control status with a serial signal.

6) The outdoor controller controls the operation as shown in the left, and also controls the compressor, outdoor fan motor, 4-way valve and pulse Modulating valve.

Selection of

operation conditions

ON/OFF

Remote controller

Control contents of remote controller

• ON/OFF (Air conditioner/Air purifier)

• Operation select (COOL/HEAT/AUTO/DRY)

• Temperature setup

• Air direction

• Swing

• Air volume select (AUTO/LOW/LOW+/MED/MED+/HIGH)

• ECO

• ON timer setup

• OFF timer setup

• Hi-POWER

• COMFORT SLEEP

• QUIET

• PRESET

• ONE-TOUCH

Description

Signal receiving

Indoor unit control

Operation command

Serial signal send/receive

Outdoor unit control

Indoor unit

Indoor unit control

• Command signal generating function of indoor unit operation

• Calculation function (temperature calculation)

• Activation compensation function of indoor fan

• Cold draft preventive function

• Timer function

• Indoor heat exchanger release control

Outdoor unit

Outdoor unit control

• Frequency control of inverter output

• Waveform composite function

• Calculation function

(Temperature calculation)

• AD conversion function

• Quick heating function

• Delay function of compressor reactivation

• Current release function

• GTr over-current preventive function

• Defrost operation function

• Indoor fan motor

• Louver motor

Inverter

• Compressor

• Outdoor fan motor

• 4-way valve

• Pulse Modulating valve

(P.M.V.)

– 30 –

Page 31

FILE NO. SVM-10001

Ite m

1. Basic operation

Operation flow and applicable data, etc.

2. Cooling/Heating operation

The operations are performed in the following parts by controls according to cooling/heating conditions.

1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signal starts being transferred form the indoor controller to the outdoor unit.

2) At the indoor unit side, the indoor fan is operated according to the contents of “2. Indoor fan motor control” and the louver according to the contents of “9. Louver control”, respectively.

3) The outdoor unit controls the outdoor fan motor, compressor, pulse Modulating valve and 4-way valve according to the operation signal sent from the indoor unit.

Operation ON

Indoor unit control

Sending of operation command signal

Outdoor unit control

Setup of remote controller

Indoor fan motor control / Louver control / Operation Hz

Control (Requierment)

Compressor revolution control / Outdoor fan motor control / Operation Hz control (Include limit control)

4-way valve control In cooling operation: ON In heating operation: OFF

Pulse Modulating valve control

[ ]

Description

3. AUTO operation

Selection of operation mode As shown in the following figure, the operation starts by selecting automatically the status of room temperature (Ta) when starting AUTO operation.

*1. When reselecting the operation mode, the fan

speed is controlled by the previous operation mode.

Cooling operation

Ts + 1

Monitoring (Fan)

Ts – 1

Heating operation

4. DRY operation

DRY operation is perfor med according to the difference between room temperature and the setup temperature as shown below.

In DRY operation, fan speed is controlled in order to prevent lowering of the room temperature and to avoid air flow from blowing directly to persons.

[˚C]

L– (W5)

1) Detects the room temperature (Ta) when the operation started.

2) Selects an operation mode from Ta in the left figure.

3) Fan operation continues until an operation mode is selected.

4) When AUTO operation has started within 2 hours after heating operation stopped and if the room temperature is 20°C or more, the fan operation is performed with ”Super Ultra LOW” mode for 3 minutes. Then, select an operation mode.

5) If the status of compressor-OFF continues for 15 minutes the room temperature after selecting an operation mode (COOL/HEAT), reselect an operation mode.

1) Detects the room temperature (Ta) when the DRY operation started.

2) Starts operation under conditions in the left figure according to the temperature difference between the room temperature and the setup temperature (Tsc). Setup temperature (Tsc) = Set temperature on remote controller (Ts) + (0.0 to 1.0)

3) When the room temperature is lower 1°C or less than the setup temperature, turn off the compressor.

+ +

Tsc

1.0

0.5

(W5+W3) / 2

SUL (W3)

Fan speed

− 31 −

Page 32

FILE NO. SVM-10001

Item

2. Indoor fan motor control

COOL ON

Fan speed setup

AUTO

[˚C]

+2.5

+2.0

+1.5

+1.0

Operation flow and applicable data, etc.

(This operation controls the fan speed at indoor unit side.) The indoor fan (cross flow fan) is operated by the phase-

control induction motor. The fan rotates in 5 stages in MANUAL mode, and in 5 stages in AUTO mode, respectively. (Table 1)

MANUAL

(Fig. 1)

Indication

L L+ M M+ H

Fan speed

(L + M) / 2

(M + H) / 2

(Fig. 2)

Air volume AUTO

M+(WB)

*3 *4 *5

*3 : Fan speed = (M + –L) x 3/4 + L *4 : Fan speed = (M + –L) x 2/4 + L *5 : Fan speed = (M + –L) x 1/4 + L

Description

* Symbols

UH : Ultra High H : High M+ : Medium+ M : Medium L+ : Low+ L: Low L- : Low– UL : Ultra Low SUL : Super Ultra Low

* The fan speed broadly varies due

to position of the louver, etc. The described value indicates one under condition of inclining downward blowing.

1) When setting the fan speed to L, L+, M, M+ or H on the remote controller, the operation is performed with the constant speed shown in Fig. 1.

2) When setting the fan speed to AUTO on the remote controller, revolution of the fan motor is controlled to the fan speed level shown in Fig. 2 and Table 1 according to the setup temperature, room temperature, and heat exchanger temperature.

+0.5

Tsc

d e

L(W6)

(Linear approximation from M+ and L)

(Table 1) Indoor fan air flow rate

Fan speed

level COOL HEAT DR

WF UH 1210 571 1300 620 1510 735

WE H 1210 571 1300 620 1510 735

WD UH M+ 1170 546 1250 590 1480 717

WC H 1120 515 1200 570 1430 686

WB M+ 1040 465 1080 490 1280 594

WA 1000 440 465

W9 M L+ 960 415 990 434 1150 514

W8 L 870 359 870 359 1000 421

W7 L+ L- L+ 850 347 860 353 980 409

W6 L L 760 291 770 297 920 372

W5 L- UL L- 760 291 770 297 900 360

W4 UL UL 700 253 720 266 840 323

W3 SUL SUL 650 222 670 234 770 280

W2 SUL 500 129 520 141 620 187

W1 500 129 500 129 520 126

Fan speed Air flow rate Fan speed Air flow rate Fan speed Air flow rate

(rpm) (m3/h) (rpm) (m3/h) (rpm) (m3/h)

M+

RAS-13SKV2-E RAS-16SKV2-ERAS-10SKV2-E

1050

1220 557

– 32 –

Page 33

[C]

5.5

)

(

FILE NO. SVM-10001

Item

2. Indoor fan motor control

HEAT

Fan speed setup

AUTO

TC ≥ 42˚C

Operation flow and applicable data, etc.

MANUAL

Indication Fan speed

L L+ M M+ H

YES

(Fig. 3)

(L + M) / 2

(M + H) / 2

Min air flow rate contro

Limited to Min WD tap

Description

1) When setting the fan speed to L, L+, M, M+ or H on the remote controller, the operation is performed with the constant speed shown in Fig. 3 and Table 1.

2) When setting the fan speed to AUTO on the remote controller, revolution of the fan motor is controlled to the fan speed level shown in Fig. 5 according to the set temperature and room temperature.

3) Min air flow rate is controlled by temperature of the indoor heat exchanger (Tc) as shown in Fig. 4.

4) Cold draft prevention, the fan speed is controlled by temperature of the indoor heat exchanger (Tc) as shown in Fig. 6.

5) In order to prevent Cold draft when compressor step during heating

operation. Then louver will move to upper position and fan speed will

reduce or off.

*Fan speed=

Fan spee

AUT

L+ (W9)

*1 *2

M+ (WD)

H (WE

Basic fan contr

–0.

–1.0

–1.5

–2.0

–2.5 –5.0

(Fig. 4)

*1: Fan speed = (M + -L+) x 1 4 + L+ *2: Fan speed = (M + -L+) x 2 4 + L+ *3: Fan speed = (M + -L+) x 3 4 + L+ (Calculated with linear approximation from M+ and L+)

(Fig. 5)

No limi

W8) + W

Cold draft preventive control

T 46 46 45 45 33

33 33 21 32 32 20

*A+4 *A+4 *A+4

*A-4 *A-4 *A-4

* No limitation while fan speed MANUAL mode is in stabilit * A: When Tsc 24, A is 24, and when Tsc < 24, A is Ts

Tsc: Set valu

Fan speed MAN Fan speed AUTO in stabilit Fan speed AUTO in startin

H (WE

Line-approximate H and S

SUL (W2

L with Tc

Stop

AL in startin

(Fig. 6)

[In starting and in stability]

FAN AUTO

F AN Man ual

In starting

• Until 12 minutes passed after operation star t

• When 12 to 25 minutes passed after operation start and room temp. is 3°C or lo w er than set temp.

• Room temp. < Set temp. –4°C

• When 12 to 25 minutes passed after operation star t and room temp. is higher than (set temp. –3°C)

• When 25 minutes or more passed after operation start

• Room temp. ≥ Set temp. –3.5°C

In stability

– 33 –

Page 34

FILE NO. SVM-10001

Item

3. Outdoor fan motor control

1) Outdoor unit operation command (Outdoor fan control)

when the motor stopped.

Operation flow and applicable data, etc.

The blowing air volume at the outdoor unit side is controlled. Receiving the operation command from the controller of

indoor unit, the controller of outdoor unit controls fan speed. * For the fan motor, a DC motor with non-stage variable

speed system is used. However, it is limited to 8 stages for reasons of controlling.

Air conditioner ON

(Remote controller)

Indoor unit controller

2) Fan speed ≥ 400

YES

OFF status of

fan motor continues.

Fan motor ON

Description

1) The operation command sent from the remote controller is processed by the indoor unit controller and transferred to the controller of the outdoor unit.

2) When strong wind blows at outdoor side, the operation of air conditioner continues with the fan motor stopped.

3) Whether the fan is locked or not is detected, and the operation of air conditioner stops and an alarm is displayed if the fan is locked.

4) According to each operation mode, by the conditions of outdoor temperature (To) and compressor revolution, the speed of the outdoor fan shown in the table is selected.

3) Fan lock

YES

4) Motor operates as shown in the table below.

In cooling operation

Compressor speed (rps)

To > 38°C

To > 28°C

To To > 15°C

To > 5.5°C

To > 0°C

°C f 0 f 0 f 0 f 1 f 1 f 2

< 0

During

ECO mode

When To is abnormal

Ta p

f 0 0 0 0

f 1

f 2

f 3

f 4

f 5

f 6

f 7 f 8

To > 38°C

To < 38°C

10SAV2-E

200 200 200

300 300 300

370 370 370

440 440 440

500 500 500

550 550 550 600 600 600

~ 13.8 ~ 31.7

MIN MAX MIN MAX MIN MAX

f 2 f 3 f C f D f E f F

f 2 f 3 f A f C f D f F

f 2 f 3 f 7 f A f 9 f C

f 1 f 3 f 2 f 5 f 4 f 7

f 1 f 1 f 1 f 2 f 2 f 4

f 2 f 3 f B f C f C f D

f 2 f 3 f 2 f 3 f B f C

f D f F f D f F f F

13SAV2-E 13SAV2-E

Air conditioner

OFF

32.3 ~ MAX

f D

Alarm

display

Compressor speed (rps)

During

ECO mode

When To is abnormal

Outdoor fan speed (rpm)

16SA

V2-E

Ta p

f 9

f A

f B

f C

f D

f E

f F

In Heating operation

~16.8 ~47.9

To > 15°C

To < 15°C To < 5.5°C To < − 5.0°C

To > 15°C To < 15°C To < 5.5°C To < − 5.5°C

10SAV2-E

600 650 650

600 700 700

650 700 700

700 800 800

700 800 900

f 3 f 8 f 9

f 3 f 9 f A

f 8 f A f D

f B f C f D

f 3 f 3 f 6

f 3 f 3 f 8

f 5 f 9 f 9

f 7 f A f B

f A f B f D

48.5 ~ MAX

16SAV2-E

– 34 –

Page 35

FILE NO. SVM-10001

Item

4. Capacity control

Remote controller Indoor unit

Operation flow and applicable data, etc.

The cooling or heating capacity depending on the load is adjusted.

According to difference between the setup value of temperature and the room temperature, the capacity is adjusted by the compressor revolution.

Set temp. (Ts)

Ts –Ta

Correction of Hz signal

Detection of electromotive force

of compressor motor winding

Detection of motor speed and rotor position

Correction value of Hz signal ≤ Operating Hz

Inverter output change

Commutation timing change

Room temp. (Ta)

Description

1) The difference between set temperature on remote controller (Ts) and room temperature (Ta) is calculated.

2) According to the temperature difference, the correction value of Hz signal which determines the compressor speed is set up.

3) The rotating position and speed of the motor are detected by the electromotive force occurred on the motor winding with operation of the compressor.

4) According to the difference resulted from comparison of the correction value of Hz signal with the present operation Hz, the inverter output and the commutation timing are varied.

5) Change the compressor motor speed by outputting power to the compressor.

* The contents of control

operation are same in cooling operation and heating operation

5. Current release control

Outdoor unit inverter main

circuit control current

Operating current ≤

Setup value

Low

Capacity control continues.

Outdoor temp.

Change of compressor speed

This function prevents troubles on the electronic parts of the compressor driving inverter.

This function also controls drive circuit of the compressor speed so that electric power of the compressor drive circuit does not exceed the specified value.

1) The input current of the outdoor unit is detected in the inverter section of the outdoor unit.

2) According to the detected outdoor temperature, the specified value of the current is

Outdoor temp. To

selected.

3) Whether the current value exceeds the specified value or

Setup of current release point

not is judged.

4) If the current value exceeds the

High

Reduce compressor speed

specified value, this function reduces the compressor speed and controls speed up to the closest one commanded from the

Current decrease

indoor unit within the range which does not exceed the specified value.

Cooling current release value Heating current release value

10SAV2-E 13SAV2-E

45°C 3.97A 4.27A 6.45A 6.30A 6.30A 7.72A

40°C 44°C 4.35A 4.88A 6.75A

16°C 39°C 6.30A 6.30A 8.47A

11°C 15.5°C

10.5°C 6.30A 6.30A 9.22A

16SAV2-A 10SAV2-E 13SAV2-E

6.30A 6.30A 10.80A

16SAV2-E

– 35 –

Page 36

FILE NO. SVM-10001

Item

6. Release protective control by temperature of indoor heat exchanger

7˚C

6˚C

5˚C

Indoor heat exchanger temperature

Operation flow and applicable data, etc.

(Prevent-freezing control for indoor heat exchanger) In cooling/dry operation, the sensor of indoor heat

exchanger detects evaporation temperature and controls the compressor speed so that temperature of the heat exchanger does not exceed the specified value.

Usual cooling capacity control

When the value is in Q zone, the

compressor speed is kept.

Reduction of compressor speed

Description

1) When temperature of the indoor heat exchanger drops below 5°C, the compressor speed is reduced. (P zone)

2) When temperature of the indoor heat exchanger rises in the range from 6°C to under 7°C, the compressor speed is kept. (Q zone)

3) When temperature of the indoor heat exchanger rises to 7°C or higher, the capacity control operation returns to the usual control in cooling operation. (R zone)

55˚C

52˚C

48˚C

Indoor heat exchanger temperature

(Prevent-over pressure control for refrigerating cycle) In heating operation, the sensor of indoor heat ex-

changer detects condensation temperature and controls the compressor speed so that temperature of the heat exchanger does not exceed the specified value.

Reduction of compressor speed

When the value is

in Q zone, the compressor speed is kept.

Usual heating capacity control

1) When temperature of the indoor heat exchanger rises in the range from 50°C to 55°C, the compressor speed is kept. (Q zone)

When temperature of the indoor heat exchanger drops in the range from 46°C to under 55°C, the compressor speed is kept. (Q zone)

2) When temperature of the indoor heat exchanger rises to 55°C or higher, the compressor speed is reduced. (P zone)

3) When temperature of the indoor heat exchanger does not rise to 50°C, or when it drops below to 46°C, the capacity control operation returns to the usual control in heating operation. (R zone)

– 36 –

Page 37

FILE NO. SVM-10001

Item

7. Defrost control (Only in heating operation)

Start of heating operation

0’ 10’ 15’ 27’40” 34’

–5˚C –7˚C

–20˚C

Outdoor heat exchanger temperature

A zone

B zone

C zone

Operation flow and applicable data, etc.

(This function removes frost adhered to the outdoor heat exchanger.)

The temperature sensor of the outdoor heat exchanger (Te sensor) judges the frosting status of the outdoor heat exchanger and the defrost operation is performed with 4-way valve reverse defrost system.

Operation time (Minute)

C zone

A zone

B zone

* The minimum value of Te sensor 10 to 15 minutes

after start of operation is stored in memory as Te0.

Table 1

When T e0 - TE ≥ 2.5 continued for 2 minutes in A zone, defrost operation starts.

When the operation continued for 2 minutes in B zone, defrost operation starts.

When T e0 - TE ≥ 3 continued for 2 minutes in C zone, defrost operation starts.

Description

The necessity of defrost operation is detected by the outdoor heat exchanger temperature. The conditions to detect the necessity of defrost operation differ in A, B, or C zone each. (Table 1)

• Defrost operation in A to C zones

1) Stop operation of the compressor for 20 seconds.

2) Invert (ON) 4-way valve 10 seconds after stop of the compressor.

3) The outdoor fan stops at the same time when the compressor stops.

4) When temperature of the indoor heat exchanger becomes 38°C or lower, stop the indoor fan.

• Returning conditions from defrost

operation to heating operation

1) Temperature of outdoor heat exchanger rises to +8°C or higher.

2) Temperature of outdoor heat exchanger is kept at +5°C or higher for 80 seconds.

3) Defrost operation continues for 15 minutes.

1) Stop operation of the compressor for approx. 50 seconds.

2) Invert (OFF) 4-way valve approx. 40 seconds after stop of the compressor.

3) The outdoor fan starts rotating at the same time when the compressor starts.

– 37 –

Page 38

FILE NO. SVM-10001

Item

8. Louver control

1) Louver position

Operation flow and applicable data, etc.

This function controls the air direction of the indoor unit.

• The position is automatically controlled according to the operation mode (COOL/HEAT).

• The set louver position is stored in memory by the microcomputer,

and the louver returns to the stored position when the next operation is performed. (Cooling/Heating memory position)

The angle of the louver is indicated as the louver closes fully is 0°.

1) Louver position in cooling operation

Initial setting of "Cooling storage position" Louver : Directs downward (35.3°)

2) Louver position in heating operation

Description

2) Air direction adjustment

Horizontal

blowing

3) Swing

• Swing operation is performed in width 35° with the stop position as

the center.

• If the stop position exceeds either upper or lower limit position,

swing operation is performed in width 35° from the limit which the stop position exceeded.

Heating operation/

AUTO (HEAT)

Initial setting of “Heating storage position” Louver : Directs downward (80.5˚)

Air direction

Inclined blowing

Blowing

downward

Inclined blowing

• The louver position can be arbitrarily set up by pressing [FIX] button.

Horizontal

blowing

• Swing When pressing [SWING] button during operation, the louver starts swinging.

– 38 –

Page 39

FILE NO. SVM-10001

Item

9. ECO operation

+6.5

+6.0

+5.5

+5.0 +4.5 +4.0

+3.5

+3.0

+2.5

+2.0 +1.5 +1.0

+0.5

TSC

-0.5

-1.0

-2.0

Operation flow and applicable data, etc.

When pressing [ECO] button on the remote controller, a Economic operation is performed.

This function operates the air conditioner with the difference between the set and the room temperature as shown in the following figure.

Frequency

Zone

Dry Max

*12 *11

*10

4 3

Min

OFF

1H 2H

Time

Description

1) The control target temperature increase 0.5ºC per hour up to 2ºC starting from the set temperature

when ECONO has been received.

2) The indoor fan speed is depend on presetting and can change

FAN

every speed after setting ECO

operation.

3) The compressor speed is controlled as shown in the left figure.

Fan speed depend on presetting and can change every speed.

–0.5 –1.0 –1.5 –2.0 –2.5 –3.0 –4.0 –5.0 –6.0 –7.0 –8.0

(Room temp. – Set temp.)

–9.0 –10.0 –11.0

* 12 (DRY max - COOL min) /6 x 5 + COOL min * 11 (DRY max - COOL min) /6 x 4 + COOL min * 10 (DRY max - COOL min) /6 x 3 + COOL min

* 9 (DRY max - COOL min) /6 x 2 + COOL min * 8 (DRY max - COOL min) /6 x 1 + COOL min

Hz 10SKV2-E 13SKV2-E 16SKV2-E

Cool min

DRY max

20 20 13

35 37 35

30 minutes

→ Time Compressor

speed

0Hz

A zone

aHz

B zone

a to cHz

C zone

cHz

1) Setting the compressor speed to Max. aHz, the temperature zone in which the operation can be

performed with Max. cHz is gradually widened after 30 minutes passed when starting ECO operation.

2) The indoor fan speed is depend

on presetting and can change every speed after setting ECO

operation.

10SKV2-E

13SKV2-E

16SKV2-E

a 20 13

c 50 50

– 39 –

Page 40

FILE NO. SVM-10001

Item

10. Temporary operation

Operation flow and applicable data, etc.

Pressing [RESET] button starts the temporary operation of [AUTO] operation. When keeping [RESET] button pressed for 10 seconds or more, the temporary [COOL] operation is performed.

1) When pressing [RESET] button, the temporary [AUTO] operation starts.

2) When keeping [RESET] button pressed for 3 seconds or more, Pi, Pi, Pi sound is heard and [AUTO RESTART] control is changed.

Filter lamp ON

Did you press [RESET] button

for 3 seconds or more?

YES

Did you press [RESET] button

for 10 seconds or more?

Switch to [AUTO RESTART] control.

YES

Press RESET button.

Temporary [AUTO] operation

Temporary [COOL] Operation

3) When keeping [RESET] button pressed for 10 seconds or more, “Pi” sound is heard and the temporary [COOL] operation starts.

4) If the filter lamp goes on, press [RESET] button to go off the filter lamp, and then press [RESET] button again.

5) To stop the temporary operation, press the button again.

11. Discharge temperature control 1. Purpose

Td value

117°C 112°C 108°C 105°C

98°C

Control operation

Judges as an error and stops the compressor. Reduce the compressor speed. Reduce slowly compressor speed. Keeps the compressor speed. If the operation is performed with lower speed than one

commanded by the serial signal, speed is slowly raised up to the commanded speed.

Operates with speed commanded by the serial signal.

This function detects error on the refrigerating cycle or error on the compressor, and perfor ms protective control.

2. Operation

• Control of the compressor speed

The speed control is performed as described in the left table based upon the discharge temperature.

Description

– 40 –

Page 41

FILE NO. SVM-10001

Item

12. Pulse Modulating valve (P.M.V.)

control

SH control

Operation flow and applicable data, etc.

This function controls throttle amount of the refrigerant in the refrigerating cycle.

According to operating status of the air conditioner, this function also controls the open degree of valve with an expansion valve with pulse Modulation.

Starting up

Initialize

Move to

initial position

Compressor ON

release control

Description

1) When starting the operation, move the valve once until it fits to the stopper. (Initialize)

* In this time, “Click” sound may be

heard.

2) Adjust the open degree of valve by super heat amount. (SH control)

3) If the discharge temperature was excessively up, adjust the open degree of valve so that it is in the range of set temperature. (Discharge temp. control)

4) When defrost operation is performed, the open degree of valve is adjusted according to each setup conditions during preparation for defrost and during defrost operation (4-way valve is inversed.).

5) To turn off the compressor while the air conditioner stops by control of the thermostat or by remote controller, adjust the open degree of valve to the setup value before stop of the compressor.

PMV open degree control

Stop by

remote controller

Room temp. sensor

(Ta sensor) control

Power OFF

* SH (Super Heat amount) =

Ts (Temperature of suction pipe of the compressor) – Tc or Te (Heat exchanger temperature at evaporation side)

* PMV: Pulse Modulating Valve

Defrost

– 41 –

Page 42

FILE NO. SVM-10001

Item

Operation flow and applicable data, etc.

13. Self-Cleaning

function

Unit now performing cooling or dry operation

Press “STOP” button

Only timer indicator lights, and Self Cleaning operation starts

Time set now elapses

Operation stops

Description

1. Purpose

The Self-Cleaning operation is to minimize the growth of mold, bacteria etc. by running the fan and drying so as to keep the inside of the air conditioner clean.

Self-Cleaning operation

When the cooling or dry operation shuts down, the unit automatically starts the Self- Cleaning operation which is then performed for the specified period based on duration of the operation which was performed prior to the shutdown, after which the Self-Cleaning operation stops. (The Self-Cleaning operation is not performed after a heating operation.)

2. Operation

1) When the stop signal from the remote

controller or timer-off function is received,

only the timer indicator light.

2) The period of the Self-Cleaning operation

is determined by the duration of the operation performed prior to the reception of the stop code.

3) After the Self-Cleaning operation has

been performed for the specified period, the unit stops operating.

• During Self-Cleaning operations: The louver opens slightly. The indoor fan operates continuously at a speed of 500 rpm.

Self-Cleaning operation times

Self-Cleaning operation time

No Self-Cleaning operation

performed (0 minutes)

30 mins.

Cooling: Auto (cooling) Dry

Heating: Auto (heating) Auto (fan only) Shutdown

Operation time

Up to 10 minutes 10 minutes

or longer

No Self-Cleaning operation performed

• To stop an ongoing Self-Cleaning operation at any time Press the start/stop button on the remote controller twice during the Self-Cleaning operation. (After pressing the button for the first time, press it for the

second time without delay (within 10 minutes).)

– 42 –

Page 43

FILE NO. SVM-10001

Item

13. Self-Cleaning

• Self-Cleaning diagram

Operation flow and applicable data, etc.

Description

function

Operation display ON OFF OFF

FCU fan

FCU louver OPEN OPEN (12.7º) CLOSE

Timer display

Compressor

CDU fan ON or OFF

14. Remote-A or B selection

rpm is depend on presetting. (500RPM)

depend on presetting of timer function. depend on presetting of timer function.

depend on presetting per room temperature.

Cool mode or dry mode

operation more than 10 mins.

Setting the remote controller

To separate using of remote control for each indoor unit in case of 2 air conditioner are installed nearly.

Remote Control B Setup.

1) Press RESET button on the indoor unit to turn the air conditioner ON.

2) Point the remote control at the indoor unit.

3) Push and hold CHK • button on the Remote

Control by the tip of the pencil. "00" will be shown

shown on the display.

4) Press MODE • during pushing CHK • . "B" will show on the display and "00" will disappear and

the air conditioner will turn OFF. The Remote

Control B is memorized.

ON ON

ON or OFF

Self-Cleaning mode

Turn off by remote controller or

timer-off function.

OFF OFF

operate 30 mins.

Automatically turn-off.

1. Purpose

This operation is to operate only one indoor unit using one remote controller.

2. Description

When operating one indoor unit in a situation where two indoor units have been installed in the same room or nearby rooms, this operation prevents the remote controller signal from being received simultaneously by both units, thus preventing both units from operating.

3. Operation

The indoor unit on which the remote controller selection has been set to B receives the signal of the remote control-

Note : 1. Repeat above step to reset Remote Control

to be A.

2. Remote Control A has not "A" display.

3. Default setting of Remote Control from

ler also set to B. (At the factory the remote controller selection is set to A on all the indoor units. There is no A setting display.)

factory is A.

OFF

ON or OFF

Operation time

− 43 −

Page 44

FILE NO. SVM-10001

Item

15. QUIET mode

Operation flow and applicable data, etc.

When the [QUIET] button is pressed, the fan of the indoor unit will be restricted the revolving speed at

speed L

−

until the [QUIET] button is pressed once

again (cancel Quiet mode).

16. COMFORT SLEEP mode

Cooling mode

• The preset temperature will increase as

show on ECO operation (Item No. 9)

• Press the [COMFORT SLEEP] button to

choose the operating hours. Repeat pressing to select the hours.

(1hr, 3hr, 5hr or 9hr)

• If the [COMFORT SLEEP] button is pressed again means cancel comfort sleep mode.

Heating mode

• The preset temperature will drop down as show on ECO operation (Item No. 9)

• Press the [COMFORT SLEEP] button to

choose the operating hours. Repeat pressing to setect thehours.

(1hr, 3hr, 5hr or 9 hr)

• If the [COMFORT SLEEP] button is pressed again means cancel comfort sleep mode.

Description

Quiet mode is the system which, control the revolving speed of indoor fan to work constantly at lower than speed L. In addition, noise level of indoor unit is less than usual.

Remarks :

1. Quiet mode is unable to work in dry mode.

2. Quiet mode is appropriate to work with less cooling load and less heating load condition.

Because of the fan speed L- may cause not enough the cooling capacity or heating capacity.

The principles of comfort sleep mode are:

• Quietness for more comfortable. When

room temperature reach setting temperature

• Save energy by changing room temperature

automatically.

• The air condition can shut down by itself

automatically.

Remarks:

Comfort sleep mode will not operate in dry

mode and fan only mode.

17. One-Touch Comfort

One touch comfort is the fully automated operation that is set according to the preferable condition in a region.

Fan Operation

AUTO

0 12 25

AUTO/L L

Time after operation starts (min)

*AUTO/L: Fan operates depends on the setting temperature and room temperature.

During the One Touch Comfort mode if the indoor unit receives any signal with other operation mode,

the unit will cancel the comfort mode and operates according to the signal received.

Operation condition for model to Europe market

When an indoor unit receives "One Touch Comfort Signal" from the remote controller,

the indoor unit operates as following.

1) Air conditioner starts to operation when the signal is received, even if the air

conditioner was OFF.

2) Operation mode is set according to room temperature, the same as AUTO mode.

) Target temperature is 24ºC.

4) Louver position is set as stored position of the operating mode.

5) Fan is controlled as followings.

− 44 −

Page 45

FILE NO. SVM-10001

Item

18. Hi-POWER Mode

Operation flow and applicable data, etc.

([Hi-POWER] button on the remote controller

is pressed)

When [Hi-POWER] button is pressed while the indoor unit is in Auto, Cooling or Heating operation, Hi-

POWER mark is indicated on the display of the remote controller and the unit operates as follows.

1. Automatic operation

• The indoor unit operates in according to the

current operation.

2. Cooling operation

• The preset temperature drops 1ºC

(The value of the preset temperature on the remote controller does not change.) The indoor unit's fan speed level increase 1 tap

3. Heating operation

• The preset temperature increases 2ºC

(The value of the preset temperature on the remote controller does not change.) The indoor unit's fan speed level increase 1 tap

4. The Hi-POWER mode can not be set in Dry operation

Description

19. FILTER When the elapsed time reaches 1000 hours after Indicator

air conditioner operation, the FILTER indicator lights. After cleaning the filters, turn off the FILTER indicator.

How to Turn Off FILTER Indicator

Press [RESET] button on the indoor unit.

NOTE :

If [RESET] button is pushed while the FILTER indicator is not lit, the indoor unit will start the automatic

operation.

− 45 −

Page 46

FILE NO. SVM-10001

9-3. Auto Restart Function

This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the ev ent of a power supply being accidentally shut down. The operation will resume without warning three minutes after power is restored.

This function is not set to work when shipped from the factory. Therefore it is necessary to set it to work.

9-3-1. How to Set the Auto Restart Function

To set the auto restart function, proceed as follows: The power supply to the unit must be on ; the function will not set if the power is off. Press the [RESET] button located in the center of the front panel continuously f or three seconds. The unit receives the signal and beeps three times. The unit then restarts operating automatically in the event of power supply being accidentally shut down.

• When the unit is standby (Not operating)

Operation

Press [RESET] button for more than three seconds. (Less than 10 seconds)

Hi POWER FILTER PAP TIMER OPERATION

RESET

• When the unit is in operation

Operation

Press [RESET] button for more than three seconds. (Less than 10 seconds)

Motions

The unit is on standby.

↓

The unit starts to operate. The green indicator is on.

↓ After approx. three seconds,

The unit beeps three times The green indicator flashes and continues to operate. for 5 seconds.

If the unit is not required to operate at this time, press [RESET] button once more or use the remote controller to turn it off.

Motions

The unit is in operation. The green indicator is on.

↓

The unit stops operating. The green indicator is turned off.

↓ After approx. three seconds,

The unit beeps three times. The green indicator flashes

for 5 seconds.

Hi POWER FILTER PAP TIMER OPERATION

If the unit is required to operate at this time, press [RESET] button

RESET

once more or use the remote controller to turn it on.

• While the filter check indicator is on, the RESET button has the function of filter reset betton.

– 46 –

Page 47

FILE NO. SVM-10001

9-3-2. How to Cancel the Auto Restart Function

To cancel auto restart function, proceed as follows : Repeat the setting procedure : the unit receives the signal and beeps three times. The unit will be required to be turned on with the remote controller after the main power supply is turned off.

• When the system is on stand-by (not operating)

Operation

Press [RESET] button for more than three seconds. (Less than 10 seconds)

Hi POWER FILTER PAP TIMER OPERATION

RESET

• When the system is operating

Operation

Press [RESET] button for more than three seconds. (Less than 10 seconds)

Motions

The unit is on standby.

↓

The unit starts to operate. The green indicator is on.

↓ After approx. three seconds, The unit beeps three times and continues to operate. If the unit is not required to operate at this time, press [RESET]

button once more or use the remote controller to turn it off.

Motions

The unit is in operation. The green indicator is on.

↓

The unit stops operating. The green indicator is turned off.

↓ After approx. three seconds, The unit beeps three times.

Hi POWER FILTER PAP TIMER OPERATION

RESET

If the unit is required to operate at this time, press [RESET] button once more or use the remote controller to turn it on.

9-3-3. Power Failure During Timer Operation

When the unit is turned off because of power failure during timer operation, the timer operation is cancelled. In that case, set the timer operation again.

NOTE :

The Everyday Timer is reset while a command signal can be received from the remote controller even if it stopped due to a power failure .

– 47 –

Page 48

FILE NO. SVM-10001

9-4. Remote control

9-4-1. Remote control and its functions

Infrared signal emitter

Start/Stop button

Mode select button (MODE)

Temperature button (TEMP)

Fan speed button (FAN

Swing louver button (SWING)

Set louver button (FIX)

On timer button (ON) Off timer button (OFF)

Sleep timer button (SLEEP)

Setup button (SET)

11 12

Clear button (CLR)

Memory and Preset button (PRESET)

One Touch button (ONE-TOUCH)

High power button (Hi-POWER)

Economy button (ECO)

Quiet button (QUIET)

Comfort sleep button (COMFORT SLEEP)

Filter reset button (FILTER)

Clock Reset button (CLOCK)

Check button (CHK)

6 7

PRESET

ONE-TOUCH

QUIET

SWING

FIX Hi-POWER POWER-SEL

TIMER

ON OFF

SLEEP

FAN

MODE

COMFORT

SLEEP

CLR

SET

15 166

9-4-2. Operation of remote control

1. ONE-TOUCH

Press the "ONE-TOUCH" button for fully automated operation that is customised to the typical consumer preferences in your region of the world. The coutomised settings control temperature air flow strength, air flow direction and other settings to provide you alternate contact with "ONE-TOUCH" OF THE BUTTON. If you prefer other settings you can select from the many other operation functions of your Toshiba unit

Press ONE-TOUCH : Start the operaton.

2. AUTOMATIC OPERATION

To automatically select cooling, heating, or fan only operation.

1. Press MODE : Select A.

2. Press MODE : Select A.

3. COOLING / HEATING / FAN ONLY OPERATION

To automatically select cooling, heating, or fan only operation.

1. Press MODE : Select Cool , Heat , or Fan only .

2. Press MODE : Set the desired temperature. Cooling: Min. 17°C, Heating : Max, 30°C, Fan Only: No temperature indication

3. Press FAN : Select AUTO, LOW , LOW+ , MED , MED+ , or HIGH .

– 48 –

Page 49

4. DRY OPERATION (COOLING ONLY)

For dehumidification, a moderate cooling performance is controlled automatically.

1. Press MODE : Select Dry .

2. Press MODE : Set the desired temperature.

5. Hi-POWER OPERATION

To automatically control room temperature and airflow for faster cooling or heating operation (except in DRY and FAN ONLY mode)

Press HI-POWER : Start and stop the operation.

6. ECO OPERATION

To automatically control room to save energy (except in DRY and FAN ONLY mode)

Press ECO : Start and stop the operation.

Note: Cooling operation; the set temperature will increase automatically 1 degree/

hour for 2 hours (maximum 2 degrees increase). For heating operation the set temperature will decrease.

7. TEMPORARY OPERATION

In case of the misplaced or discharged remote control

FILE NO. SVM-10001

• Pressing the RESET button, the unit can start or stop

without using the remote control.

• Operation mode is set on AUTOMATIC

operation, preset temperature is 24°C and fan operation is automatic speed.

8. TIMER OPERATION

Setting the ON Timer Setting the OFF Timer

Press ON : Set the desired ON timer.

Press

SET

: Set the timer. Press

CLR

: Cancel the timer. Press

Press

OFF

: Set the desired OFF timer.

SET

: Set the timer.

CLR

Everyday timer allows the user to set both the ON & OFF timers and will be activated on a daily basis.

Setting Everyday Timer

Press

: Set the ON timer.

OFF

: Set the OFF timer.

Press

mark flashing.

SET

button during the ( or )

· During the every day timer is activation, both arrows are indicated.

( or )

Note:

· Keep the remote control in accessible transmission to the indoor unit; otherwise, the time lag of up to 15 minutes will occur.

· The setting will be saved for the next same operation.

– 49 –

Page 50

9. PRESET OPERATION

Set your preferred operation for future use. The setting will be memorized by the unit for future operation (except air flow direction).

1. Select your preferred operation.

2. Press and hold PRESET for 3 seconds to memorize the setting. The mark displays.

3. Press PRESET : Operate the preset operation.

10. AUTO RESTART OPERATION

To automatically restart the conditioner after the power failure (Power of the unit must be on.)

Setting

1. Press and hold the RESET button on the indoor unit for 3 seconds to set the operation. (3 beep sound and OPERATION lamp blink 5 time/sec for 5 secpmds)

• Do not operate ON timer and OFF timer.

2. Press and hold the RESET button on the indoor unit for 3 seconds to cancel the operation. (3 beep sound but OPERATION lamp does not blink)

11. QUIET OPERATION

To operate at super low fan speed for quiet operation (except in DRY mode)

FILE NO. SVM-10001

Press QUIET : Start and stop the operation.

Note: Under certain conditions, QUIET operation may not provide adequate

cooling or heating due to low sound features.

12. COMFORT SLEEP OPERATION

To save energy while sleeping, automatically control air flow and automatically turn OFF.

Press COMFORT SLEEP : Select 1, 3, 5 or 9 hrs for OFF timer operation.

Note: The cooling operation, the set temperature will increase automatically

1 degree/hour for 2 hours (maximum 2 degrees increase). For heating operation, the set temperature will decrease.

13. SLEEP TIMER OPERATION

To start the sleep timer (OFF timer) operation

Press SLEEP : Select 1, 3, 5 or 9 hrs for OFF timer operation.

− 50 −

Page 51

FILE NO. SVM-10001

9-4-3. Name and Functions of Indications on Remote Controller

[Display]

All indications, except for the clock time indicator, are displayed by pressing the button.

Transmission mark

This transmission mark remote controller transmits signals to the indoor unit.

Mode indicator

Indicates the current operation mode. (AUTO : Automatic control, A : Auto changeover control,

T emperature indicator

Indicates the temperature setting. (17°C to 30°C)

FAN speed indicator

Indicates the selected fan speed. AUTO or five fan speed levels

(

LOW , LOW+ , MED , MED+ , HIGH ) can be shown. Indicates AUTO when the operating mode is

either AUTO or : Dry.

: Cool, : Dry , : Heat)

indicates when the

TIMER and clock time indicator

The time setting for timer operation or the clock time is indicated.

The current time is always indicated except during TIMER operation.

Hi-POWER indicator

Indicates when the Hi-POWER operation starts. Press the Hi-POWER button to start and press it

again to stop the operation.

(PRESET) indicator

Flashes for 3 seconds when the PRESET button is pressed during operation.

The button for more than 3 seconds while the mark is flashing.

Press another button to turn off the mark.

ECO indicator

Indicates when the ECO is in activated. Press the ECO button to start and press it again

to stop operation.

mark is shown when holding down the

A, B change indicator remote controller

When the remote controller switching function is set, “B” appears in the remote controller display. (When the remote controller setting is “A”, there is no indication at this position.)

10 Comfort sleep

Indicates when comfort sleep is activaled. Press comfort sleep button to selectter

11 Quiet

Indicates when quiet is activated. Press quiet button to start and press it again to stop operation.

12 One-Touch

Indicates when one touch comfort is activated. Press one-touch button to start the operation.

13 Swing

Indicates when louver is swing. Press swing button to start the swing operation

and press it again to stop the swing operation.

– 51 –

Page 52

10. INSTALLATION PROCEDURE

10-1. Installation Diagram of Indoor and Outdoor Units

Hook

65 mm or more

Installation

plate

FILE NO. SVM-10001

For the rear left and left piping

Pure flow filter

3 Batteries

(

)

Pure flow filter

Pan head

wood screw

Wireless remote control

ilt

Insert the cushion between the indoor unit and wall, and tilt the indoor unit for better operation.

Wall

Shield pipe

Do not allow the drain hose to

get slack.

Cut the piping hole sloped slightly.

Remote control holder

Make sure to run the drain hose sloped downward.

The auxiliary piping can be connected to the left, rear left, rear right, right, bottom right

or bottom left.

Vinyl tape

Apply after carrying out a drainage test.

Right

Before installing the wireless remote controller

• Loading Batteries

1. Remove the battery cover.

2. Insert 2 new batteries (AAA type)

−

following the (+) and (

) positions.

2 Wireless remote controller

or more

or m

100 m

ore

600 mm

600 mm or

mm or

Saddle

Extension drain hose (Not available, provided by installer)

3 Batteries

Rear right

Bottom right

Rear left

Left

Bottom left

Insulate the refrigerant pipes separately with insulation, not together.

6 mm thick heat resisting polyethylene foam

– 52 –

Page 53

10-2. Installation

10-1-2. Optional installation parts

FILE NO. SVM-10001

Part

Code

Parts name

Refrigerant piping Liquid side : ∅6.35 mm

Gas side : 9.52 mm

∅

(10,13SKV2 Series)



12.70 mm∅

(16SKV2 Series)

Pipe insulating material

(polyethylene foam, 6 mm thick)

Putty, PVC tapes

125 mm108 mm

320 mm

28 mm

86 mm

25 mm

Air inlet

102 mm

Q'ty

One

each

One

each

Air outlet

600 mm

90 mm

Drain outlet

Fig. 10-2-1

Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind. Use ∅ 8 mm or ∅ 10 mm anchor bolts and nuts.

If it is necessary to drain the defrost water, attach drain nipple 9 and cap water proof 10 to the bottom plate of the outdoor unit before installing it.

– 53 –

Page 54

10-2-2. Accessory and installation parts

Part

No.

Part name (Q’ty)

Part

No.

Part name (Q’ty)

Part

No.

FILE NO. SVM-10001

Part name (Q’ty)

Installation plate x 1

SLEEP

CHK

FILTER

CLOCK

SET

Wireless remote control x 1

Battery x 2

Others

Name

Owner’s manual

Installation manual

Remote control holder x 1

ONE-

QUIET

SWIN

TIMER

PRES

TOUCH

FIX Hi-PO

TEMP

OFF

WER

COMF

MODE

FAN

SLEE

ECO

CLR

ORT

Mounting screw ∅4 x 25 s x 6

Flat head wood screw

Pure flow filter x 1

∅3.1 x 16 s x 2

Drain nipple* x 1

Cap water proof x 2

(For 09k model only)

The part marked with asterisk (*) is packaged with the outdoor unit.

– 54 –

Page 55

FILE NO. SVM-10001

10-2-3. Installation/Servicing T ools

Changes in the product and components

In the case of an air conditioner using R410A, in order to prev ent any other refrigerant from being charged accidentally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch)

• In order to increase the pressure resisting strength of the refrigerant piping flare processing diameter and size of opposite side of flare nuts has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

New tools for R410A

Gauge manifold

Charge hose

Electronic balance for refrigerant charging

Torque wrench (nominal diam. 1/2, 5/8)

Flare tool (clutch type)

Gauge for projection adjustment

Vacuum pump adapter

Applicable to R22 model

× ×

——

Changes

As pressure is high, it is impossible to measure by means of conventional gauge. In order to prevent any other refrigerant from being charged, each port diameter has been changed.

In order to increase pressure resisting strength, hose materials and port size have been changed (to 1/2 UNF 20 threads per inch). When purchasing a charge hose, be sure to confirm the port size.

As pressure is high and gasification speed is fast, it is difficult to read the indicated value by means of charging cylinder, as air bubbles occur.

The size of opposite sides of flare nuts have been increased. Incidentally, a common wrench is used for nominal diameters 1/4 and 3/8.

By increasing the clamp bar’s receiving hole, strength of spring in the tool has been improved.

Used when flare is made by using conventional flare tool.

Connected to conventional vacuum pump. It is necessary to use an adapter to prevent vacuum pump oil from flowing back to the charge hose. The charge hose connecting part has two ports-one for conventional refrigerant (7/16 UNF 20 threads per inch) and one for R410A. If the vacuum pump oil (mineral) mixes with R410A a sludge may occur and damage the equipment.

Gas leakage detector

• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the U. S’s ARI specified rose color (ARI color code: PMS 507).

• Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch corresponding to the charge hose’s port size.

Exclusive for HFC refrigerant.

– 55 –

Page 56

10-3. Indoor Unit

10-3-1. Installation Place

• A place which provides enough spaces around the indoor unit as shown in the diagram.

• A place where there are no obstacle near the air inlet and outlet.

• A place which allows easy installation of the piping to the outdoor unit.

• A place which allows the front panel to be opened.

• The indoor unit shall be installed so that the top of

the indoor unit is positioned at least 2m in height.

• Also, avoid putting anything on the top of the indoor unit.

CAUTION

• Direct sunlight on the indoor unit wireless

receiver should be avoided.

• The microprocessor in the indoor unit should

not be too close to r-f sources. (For details, see the owner's manual.)

Remote controller

• Should be placed where there are no obstacles, such as curtains, that may block the signal.

• Do not install the remote controller in a place

exposed to direct sunlight or close to a heating source, such as a stove.

• Keep the remote controller at least 1 m away from

the nearest TV set or stereo equipment. (This is necessary to prevent image disturbances or noise interference.)

• The location of the remote controller should be

determined as shown below.

FILE NO. SVM-10001

10-3-2. Drilling a Hole and Mounting Instal-

lation Plate

Drilling a hole

When install the refrigerant pipes from the rear.

Pipe hole

∅

65 mm

100 mm

Fig. 10-3-2

1. After determining the pipe hole position on the installation plate ( ð ) drill the pipe hole (Ø65 mm) at a slight downward slant to the outdoor side.

NOTE :

• When drilling into a wall that contains a metal lath,

wire lath or metal plate, be sure to use a pipe hole brim ring sold separately.

Mounting the installation plate

Anchor bolt holes

Hook

(Side view)

Indoor unit

Reception range

(Top vi ew)

Indoor unit

Remote controller

Fig. 10-3-1

Reception range

Remote controller

170

Pipe hole

Indoor unit

Hook

Thread

Weight

Fig. 10-3-3

Hook

Pipe hole

Mounting screw

82.5

Installation plate

2 m or more from floor

– 56 –

Page 57

When the installation plate is directly mounted on the wall

1. Securely fit the installation plate onto the wall by screws with the upper and lower catches, that hold the indoor unit, facing out.

2. To mount the installation plate on a concrete wall use anchor bolts. Drill the anchor bolt holes as illustrated in the above figure.

3. Install the installation plate horizontally and level.

FILE NO. SVM-10001

10-3-3. Electrical W ork

1. The supply voltage must be the same as the rated voltage of the air conditioner.

2. Prepare a power source for the exclusive use of the air conditioner.

NOTE :

• Wire type :

More than

H07RN-F or 245IEC66.

CAUTION

When installing the installation plate with mounting screw, do not use the anchor bolt hole. Otherwise the unit may fall down and result in personal injury and property damage.

Anchor bolt

Projection 15mm or less

Fig. 10-3-4

5 mm dia. hole

CAUTION

• This appliance can be connected to a main circuit breaker in either of the fo llowing two ways.

1. Connection to fixed wiring:

A switch or circuit breaker which disconnects all poles and has a contact separation of at least 3 mm must be incorporated in the fixed wiring. An approved circuit breaker or switch must be used.

2. Connection with power supply plug:

Attach power supply plug with power cord and plug it into wall outlet. An approved power supply cord and plug must be used.

NOTE :

• Perf orm wiring work being sure the wire length is long enough.

10-3-4. Wiring Connection

7 Mounting screw Ø4 × 25L

Clip anchor (local parts)

Fig. 10-3-5

CAUTION

Failure to securely install the unit may result in personal injury and/or property damage if the unit falls.

• In case of block, brick, concrete or similar type walls, drill 5 mm dia. holes in the wall.

• Insert clip anchors for the  mounting screws.

NOTE :

• Install the installation plate using mounting screws between 4 to 6, being sure to secure all four corners.

How to connect the connecting cable

Wiring the connecting cable can be carried out without removing the front panel.

1. Remove the air inlet grille. Open the air inlet grille upward and pull it toward y ou.

2. Remove the terminal cover and cord clamp.

3. Insert the connecting cable (or as according to local regulations/codes) into the pipe hole on the wall.

4. Pull the connecting cable through the cable slot on the rear panel so that it protrudes about 15 cm out of the front.

5. Insert the connecting cable fully into the terminal block and secure it tightly with scre ws.

6. Tightening torque: 1.2 N•m (0.12 kgf•m)

7. Secure the connecting cable with the cord clamp.

8. Attach the terminal cover , rear plate bushing and air inlet grille on the indoor unit.

– 57 –

Page 58

CAUTION

FILE NO. SVM-10001

10-3-5. Piping and Drain Hose Installation

• Be sure to refer to the wiring system diagram labeled inside the front panel.

• Check local electrical regulations for any specific wiring instructions or limitations.

Terminal cover

Screw

Connecting cable

out

Cord clamp

Screw

Stripping length of the connecting cable

Terminal block

Earth line

Connecting cable

110 mm

10 mm

50 mm

Earth line

NOTE :

• Use stranded wire only.

• Wire type : H07 RN-F or more

Piping and drain hose forming

• Since condensation results in machine trouble, make sure to insulate both the connecting pipes separately. (Use polyethylene foam as insulating material.)

Rear right

Rear left

Bottom left

Changing

Left

drain hose

Bottom right

Die-cutting

Right

Front panel slit

Fig. 10-3-10

1. Die-cutting front panel slit

Cut out the slit on the left or right side of the front panel for the left or right connection and the slit on the bottom left or side of thefront panel for the bottom left or right connection with a pair of nippers.

2. Changing drain hose

For left connection, left-bottom connection and rear-left connection’s piping, it is necessary to relocate the drain hose and drain cap.

Piping preparation

How to remove the drain cap

Clip drain cap with needle-nose pliers, and pull out.

Fig. 10-3-11

How to remove the drain hose

The drain hose is secured in place by a screw. Remove the screw securing the drain hose, then pull

out the drain hose.

Screw

Drain hose

– 58 –

Fig. 10-3-12

Page 59

FILE NO. SVM-10001

How to attach the drain cap

1. Insert hexagonal wrench (4 mm).

4 mm

Fig. 10-3-13

2. Firmly insert drain cap.

No gap

Do not apply lubricating oil (refrigerant machine oil) when inserting the drain cap. If applied, deterioration and

Insert a hexagon wrench (Ø4mm)

drain leakage of the drain plug may occur.

In case of bottom right or bottom left piping

• After making slits on the front panel with a knife or similar tool, cut them out with a pair of nippers or an equivalent tool.

Slit

Fig. 10-3-16

Left-hand connection with piping

Bend the connecting pipes so that they are positioned within 43 mm above the wall surface.

If the connecting pipes are positioned more than 43 mm above the wall surface, the indoor unit may be unstable.

When bending the connecting pipe, make sure to use a spring bender to avoid crushing the pipe.

Refer to the table below for the bending radius of each connection pipe.

Fig. 10-3-14

How to attach the drain hose

Always use the original scre w that secured the drain hose to the unit. If using a different screw may cause water to leak.

Insert the drain hose firmly until the connector contacts with the insulation, then secure it in place using the original screw .

CAUTION

Securely insert the drain hose and drain cap; otherwise, water may leak.

In case of right or left piping

• After making slits on the front panel with a knife or similar tool, cut them out with a pair of nippers or an equivalent tool.

Outer diameter

6.35 mm

9.52 mm

12.7 mm

Bending radius

30 mm 40 mm 50 mm

To connect the pipe after installation of the unit (figure)

(To the front flare)

270 mm 230 mm

Liquid side

R30 or less (Ø6.35), R40 or less (Ø9. 52), R50 or less (Ø12. 7) Use polishing (polyethylene core or the like for bending pipe).

43 mm

Gas side

Outward form of indoor unit

Use a screwdriver handle, etc.

Slit

Fig. 10-3-15

Fig. 10-3-17

NOTE :

If the pipe is incorrectly bent, the indoor unit may be unstable on the wall.

After passing the connecting pipe through the pipe hole, connect the connecting pipe to the auxiliary pipes and wrap the facing tape around them.

– 59 –

Page 60

CAUTION

50 mm or more

Do not rise the drain hose.

Do not form the drain hose into the waved shape.

Do not put the drain hose end into water.

Do not put the drain hose end in the drainage ditch.

• Bind the auxiliary pipes (two) and connecting

cable with facing tape tightly. In case of leftward piping and rear-leftward

piping, bind the auxiliary pipes (two) only with facing tape.

Indoor unit

Auxiliary pipes

Installation plate

Fig. 10-3-18

• Carefully arrange the pipes so that none of the

pipes stick out of the rear plate of the indoor unit.

• Carefully connect the auxiliary pipes and

connecting pipes to each other and cut off the insulating tape wound on the connecting pipe to avoid doub le-taping at the joint, moreo ver, seal the joint with the vinyl tape, etc.

• Since condensation can result in machine

performance trouble, be sure to insulate both connecting pipes. (Use polyethylene foam as insulating material.)

• When bending a pipe, be careful not to crush it.

Connecting cable

FILE NO. SVM-10001

10-3-7. Drainage

1. Run the drain hose at a downward sloped angle.

NOTE :

• Hole should be made at a slight downward slant on the outdoor side.

Fig. 10-3-21

2. Put water in the drain pan and make sure that the

water is being drained outside.

3. When connecting extension drain hose, insulate

the connection part of extension drain hose with shield pipe.

Shield pipe

10-3-6. Indoor Unit Installation

1. Pass the pipe through the hole in the wall, and hook the indoor unit on the installation plate at the upper hooks.

2. Swing the indoor unit to right and left to confirm that it is firmly hooked on the installation plate.

3. While pressing the indoor unit onto the wall, hook it at the lower part on the installation plate. Pull the indoor unit toward you to confirm that it is firmly hooked on the installation plate.

Hook

• For detaching the indoor unit from the installation

plate pull the indoor unit toward you while pushing the bottom up at the specified places.

Hook here

Installation plate

Fig. 10-3-19

Push (unhook)

Drain hose

Inside the room

Extension drain hose

Fig. 10-3-22

CAUTION

Install the drain pipe for proper drainage . Improper drainage can result in water dripping

inside the room.

This air conditioner has been designed to drain water collected from condensation which forms on the back of the indoor unit, to the drain pan.

Therefore, do not locate the po wer cord and other parts at a high place than the drain guide.

Wall

Drain guide

PushPush

Fig. 10-3-20

– 60 –

Space for pipes

Fig. 10-3-23

Page 61

10-4. Outdoor Unit

10-4-1. Installation Place

• A place which provides enough space around the

outdoor unit as shown in the diagram.

• A place which can bear the weight of the outdoor

unit and does not allow an increase in noise level and vibration.

• A place where the operation noise and discharged

air do not disturb neighbors.

• A place which is not exposed to a strong wind.

• A place free of combustible gases.

• A place which does not block a passageway.

• When the outdoor unit is to be installed in an

elev ated position, be sure to secure its feet.

• This air conditioner accepts a connection piping

length of up to 20 m.

• There is no need to add refrigerant as long as the length of the connection piping is 15 m or less.

• You will need to add 20 g of refrigerant per meter of added connection piping for installations requiring connection piping to be between 16 m to 20 m.

• An allowable height level is up to 10 m.

• A place where the drain water does not cause any

problems.

FILE NO. SVM-10001

Precautions for adding refrigerant

• Use a scale having a precision with at least 10 g per index line when adding the refrigerant.

Do not use a bathroom scale or similar instrument.

• Use liquid refrigerant when refilling the refrigerant. Since the refrigerant is in liquid form, it can fill quickly.

Therefore, perf orm the filling operation carefully and insert the refrigerant gradually.

CAUTION

1 . Install the outdoor unit without anything

blocking the discharging air.

2. When the outdoor unit is installed in a place

always exposed to strong winds like on the coast or on a high story of a building, secure the normal fan operation using a duct or a wind shield.

3. Especially in windy areas, install the unit to

prev ent the admission of wind.

4. Installation in the following places may result

in trouble. Do not install the unit in such places.

• A place full of machine oil.

• A saline-place such as the coast.

• A place full of sulfide gas.

• A place where high-frequency waves are

likely to be generated, such as from audio equipment, welders, and medical equipment.

Strong wind

Fig. 10-4-1

– 61 –

Page 62

10-4-2. Draining the Water

• Holes are provided on the base plate of the outdoor unit to ensure that the defrost water produced during heating operations is drained off efficiently.

If a centralized drain is required when installing the unit on a balcony or wall, follow the steps below to drain off the water.

1 . Proceed with water-proofing by installing the

water-proof rubber caps  in the 2 elongated holes on the base plate of the outdoor unit. [How to install the water-proof rubber caps]

1) Place four fingers into each cap, and insert the caps into the water drain holes by pushing them into place from the underside of the base plate.

2) Press down on the outer circumferences of the caps to ensure that they hav e been inserted tightly. (Water leaks may result if the caps have not been inserted properly, if their outer circumferences lift up or the caps catch on or wedge against something.)

FILE NO. SVM-10001

10-4-3. Refrigerant Piping Connection

Flaring

1. Cut the pipe with a pipe cutter.

90˚

2. Insert a flare nut into the pipe, and flare the pipe.

• Projection margin in flaring : A (Unit : mm)

Rigid (Clutch type)

Outer dia. of

copper pipe

6.35

9.52

Obliquity Roughness Warp

Fig. 10-4-4

R410A

tool used

0 to 0.5 0 to 0.5

Conventional

tool used

1.0 to 1.5

Water-proof rubber caps

(supplied with the outdoor unit)

Base plate

9 Drain nipple

Fig. 10-4-2

2. Install the drain nipple  and a commercially available drain hose (with 16 mm inside diameter), and drain off the water. (For the position where the drain nipple  is installed, refer to the installation diagr am of the indoor and outdoor units.)

• Check that the outdoor unit is horizontal, and

route the drain hose at a downward sloped angle while ensuring that it is connected tautly.

12.7

0 to 0.5

Imperial (Wing nut type)

Outer dia. of

copper pipe

6.35

9.52

12.7

R410A

1.5 to 2.0

2.0 to 2.5

• Flaring size : B (Unit : mm)

Fig. 10-4-6

Outer dia. of copper pipe

6.35

9.52

1.0 to 1.5

Die Pipe

Fig. 10-4-5

–0.4

R410A R22

9.1 9.0

13.2 13.0

Base plate

9 Drain nipple

Commercially available drain hose

Do not use ordinary garden hose, but one can flatten and prevent water from draining.

Fig. 10-4-3

12.7

16.6 16.2

• In case of flaring for R410A with the conventional flare tool, pull it out approx. 0.5 mm more than that of R22 to adjust to the specified flare size.

The copper pipe gauge is useful for adjusting projection margin size.

– 62 –

Page 63

Tightening Connection

FILE NO. SVM-10001

Use a vacuum pump

Align the centers of the connecting pipes and tighten the flare nut as much as possible with y our fingers. Then tighten the nut with a wrench and torque wrench as shown in the figure.

Half union

Externally threaded side

Use a wrench to secure.

Flare nut

Internally threaded side

Use a torque wrench to secure.

Fig. 10-4-7

CAUTION

• Do not apply excessiv e force. Otherwise, the nut may break.

(Unit : N·m)

Outer dia. of copper pipe

Ø6.35 mm Ø9.52 mm Ø12.7 mm

Tightening torque

14 to 18 (1.4 to 1.8 kgf•m) 33 to 42 (3.3 to 4.2 kgf•m) 50 to 62 (5.0 to 6.2 kgf•m)

Be sure to use a vacuum pump with counter-flow prevention function so that oil inside the pump does not flow back into the air conditioner pipes when the pump stops. (If oil inside the vacuum pump enters into the air conditioner circuit which uses R410A, trouble with the refrigeration system may develop.)

1. Connect the charge hose from the manifold valve to the service port of the gas side packed valve.

2. Connect the charge hose to the port of the vacuum pump.

3. Open fully the low pressure side handle of the gauge manifold valve.

4 . Operate the vacuum pump to begin evacuating.

Perform evacuating for about 15 minutes if the piping length is 20 meters (15 minutes for 20 meters) (assuming a pump capacity of 27 liters per minute).

Confirm that the compound pressure gauge reading is

-101 kPa (76 cmHg).

5. Close the low pressure valve handle of gauge manifold.

6. Open fully the valve stem of the packed valves (both sides of Gas and Liquid).

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

• Tightening torque for connection of flare pipe The pressure of R410A is higher than R22.

(Approx. 1.6 times.) Therefore securely tighten the flare pipes which connect the outdoor unit and the indoor unit with the specified tightening torque using a torque wrench. If any flare pipe is incorrectly connected, it may cause not only

Flare at indoor unit side

a gas leakage but also trouble in the refrigeration cycle.

Flare at outdoor unit side

Fig. 10-4-8

10-4-4. Evacuating

After the piping has been connected to the indoor unit, perform the air purge.

AIR PURGE

Evacuate the air in the connecting pipes and in the indoor unit using a vacuum pump. Do not use the refrigerant in the outdoor unit.

For details, see the vacuum pump manual.

Compound pressure gauge

-101kPa (76cmHg) Handle Lo

Charge hose (For R410A only)

Connecting pipe

Service port (Valve core (Setting pin))

Packed valve at liquid side

Pressure gauge

Manifold valve

Handle Hi (Keep full closed)

Charge hose (For R410A only)

Vacuum pump adapter for counter-ﬂ ow prevention (For R410A only)

Vacuum

pump

Packed valve at gas side

Fig. 10-4-9

CAUTION

•

KEEP IMPORTANT 5 POINTS FOR PIPING WORK

(1) Take away dust and moisture (Inside of the

connecting pipes.)

(2) Tight connection (between pipes and unit) (3) Evacuate the air in the connecting pipes using

VACUUM PUMP.

(4) Check gas leak (connected points)

(5) Be save to fully open the packed valves

before operation.

– 63 –

Page 64

Packed Valve handling precautions

• Open the valve stem all the way; but do not try to open it beyond the stopper.

• Securely tighten the valve stem cap with torque in the following tab le:

FILE NO. SVM-10001

Revised

Gas side (Ø12.7 mm) Gas side (Ø9.52 mm) Liquid side (Ø6.35 mm)

Service port

50 to 62 N•m (5.0 to 6.2 kgf•m)

33 to 42 N•m (3.3 to 4.2 kgf•m) 14 to 18 N•m (1.4 to 1.8 kgf•m)

14 to 18 N•m (1.4 to 1.8 kgf•m)

Hexagonal wrench is required.

4mm

Fig. 10-4-10

10-4-5. Wiring Connection

1. Remove the valve cover, the electric parts cover

and the cord clamp from the outdoor unit.

2. Connect the connecting cable to the terminal as

identified by the matching numbers on the terminal block of indoor and outdoor unit.

3. Insert the power cord and the connecting cable

fully into the terminal block and secure it tightly with screws.

4. Insulate the unused cords (conductors) from

water entering in the outdoor unit. Locate them so that they do not touch any electrical or metal parts.

5. Secure the power cord and the connecting cable

with the cord clamp.

6. Attach the electric parts cover and the valve

cover on the outdoor unit.

Stripping length of connecting cable

Terminal block

123 LN

Fig. 10-4-12

Model RAS-

Power source

Maximum running current

Installation fuse rating

Power cord Connection cable

10SKV2-E 13SKV2-E 16SKV2-E

220 – 240 V ~50 Hz

230 V ~60 Hz

220 –

8.0 A

16 A breaker or fuse

(All types can be used.) H07RN-F or 245IEC66 (1.5 mm²) H07RN-F or 245IEC66 (1.0 mm²)

11.0 A

CAUTION

• Incorrect wiring connection may cause electrical parts to burn out.

• Be sure to comply with local regulations/codes when running the wire from outdoor unit to indoor unit. (Size of wire and wiring method etc.)

• Every wire must be securely connected.

• If incorrect or incomplete wiring is carried out, fire or smoke may result.

• Prepare the power supply for the exclusive use of the air conditioner.

• This product can be connected to the main breaker.

Connection to fixed wiring: A switch which disconnects all poles and has a contact separation of at least 3 mm must be incorporated in the fixed wiring when connecting to a main breaker circuit.

Connecting cable Power cord

Fig. 10-4-11

– 64 –

Page 65

10-5. Test Operation

10-5-1. Gas Leak Test

• Check the flare nut connections for gas leaks with a gas leak detector and/or soapy water.

Valve Cover

Check places for flare nut connection (Indoor unit)

Check places for outdoor unit

Fig. 10-5-1

10-5-2. Test Operation

To test the system, press and hold RESET button for 10 sec. (There will be one short beep.)

FILE NO. SVM-10001

10-5-4. Remote Controller A or B Selection

Setting

When two indoor units are installed in the separated rooms, it is not necessary to change the selector switches.

Remote control A or B Selection

• When two indoor units are installed in the same room or

adjacent two rooms, if operating a unit, two units may receive the remote control signal simultaneously and operate. In this case, the operation can be preserved by setting either one

indoor unit or remote control to B setting. (Both are set to A

setting in factory shipment.)

• The remote control signal is not received when the settings of

indoor unit and remote control are different.

• There is no relation between A setting/B setting and A room/B

room when connecting the piping and cables.

Remote Control A-B Selection

To separate using of remote control for each indoor unit in case

of 2 air conditioner are installed nearly.

the remote control signal simultaneously and operate. In this

Remote Control B Setup.

1. Press RESET button on the indoor unit to turn the air conditioner ON. 2

. Point the remote control at the indoor unit.

3. Push and hold CHK button on the Remote Control by the tip of the pencil. "00" will be shown on the display.

4. Press MODE during pushing CHK , "B" will show on the display and"00" will disappear and the air conditioner will turn OFF. The Remote Control B is memorized.

Note : 1. Repeat above step to reset Remote Control to be A.

2. Remote Control A have not "A" display.

3. Detault setting of Remote Control from factory is A.

Fig. 10-5-2

10-5-3. Auto Restart Setting

This product is designed so that, after a power failure, it can restart automatically in the same operating mode as before the pow er failure.

Information

The product was shipped with Auto Restart function in the OFF position. Turn it ON as required.

How to Set the Auto Restart

• Press and hold the RESET button for about 3 seconds. After 3 seconds, three short electric beeps will be heard to inform you that the Auto Restart has been selected.

• To cancel the Auto Restart, follow the steps described in the section Auto Restart Function on Owner’s Man ual.

“B” Display “00” Display

PRESET

ONE-TOUCH

QUIET

SWING

TIMER

SLEEP

CHK

FIX Hi-POWER ECO

ON OFF

●

FILTER ● CLOCK

FAN

MODE

COMFORT

SELECT

●

Fig. 10-5-3

CLR

SET

– 65 –

Page 66

FILE NO. SVM-10001

11. HOW TO DIAGNOSE THE TROUBLE

The pulse motor circuits are mounted to both indoor and outdoor units. Therefore, diagnose troubles according to the trouble diagnosis procedure as described below. (Ref er to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.)

Table 11-1

No.

1 2 3 4 5

Troubleshooting Procedure

First Confirmation Primary Judgment Judgment by Flashing LED of Indoor Unit Self-Diagnosis by Remote Controller Judgment of Trouble by Every Symptom

No.

6 7 8 9

Troubleshooting Procedure

How to Check Simply the Main Parts Troubleshooting How to Diagnose Trouble in Outdoor Unit How to Check Simply the Main Parts How to Simply Judge Whether Outdoor

Fan Motor is Good or Bad

K Precautions when handling the new inverter (3DV Inverter)

CAUTION: HIGH VOLTAGEN

The high voltage circuit is incorporated. Be careful to do the check service, as the electric shock may be caused in case of touching parts on the

P.C. board by hand.

The new inverter (3DV inverter) will be incorporated starting with this unit.

(3DV: 3-shunt Discrete Vector control)

K The control circuitry has an uninsulated construction.

Shared potential

MCU

Driver

Amplifier

Fig. 11-1

Amplifier

IGBT × 6

FET × 6

Compressor

Fan motor

– 66 –

Page 67

FILE NO. SVM-10001

CAUTION

A high voltage (equivalent to the supply voltage) is also energized to ground through the sensors, PMV and other low-voltage circuits. The sensor leads and other wires are covered with insulated tubes for protection. Nevertheless, care must be taken to ensure that these wires are not pinched.

Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power.

At times such as when the circuit board is to be replaced, place the circuit board assembly in a vertical position.

Laying the board flat on an electrically conductive object (such as the top panel of the air conditioner's outdoor unit) while a charge is still retained by the electrolytic capacitors of the inverter's main circuit may cause short-circuiting between the electrolytic capacitors and secondary circuit components and result in damage to the components.

Fig. 11-2

Do NOT lay the circuit board assembly flat.

K Precautions when inspecting the control section of the outdoor unit

NOTE :

A large-capacity electrolytic capacitor is used in the outdoor unit controller (inverter). Therefore, if the po wer supply is turned off, charge (charging voltage DC280 to 380V) remains and discharging takes a lot of time. After turning off the power source, if touching the charging section before discharging, an electrical shock may be caused. Discharge the electrolytic capacitor completely by using soldering iron, etc.

< Discharging method >

1. Remove the inverter cover (plating) by opening four mounting claws.

2. As shown below, connect the discharge resistance (approx. 100Ω40W) or plug of the soldering iron to

voltage between + – terminals of the C14 (“CAUTION HIGH VOLTAGE” is indicated.) electrolytic capacitor (500µF/400V or 760µF/400V) on P.C. board, and then perform discharging.

Discharging position (Discharging period 10 seconds or more)

Plug of soldering iron

Inverter cover

P. C. board (Soldered surface)

– 67 –

Fig. 11-3

Page 68

FILE NO. SVM-10001

11-1. First Confirmation

11-1-1. Confirmation of Power Supply

Confirm that the power breaker operates (ON) normally.

11-1-2. Confirmation of Power Voltage

Confirm that power voltage is AC 220–230–240 ± 10%. If power voltage is not in this range, the unit may not operate normally.

11-1-3. Operation Which is not a Trouble (Program Operation)

For controlling the air conditioner, the program operations are built in the microcomputer as described in the following tabl e.

If a claim is made for running operation, check whether or not it meets to the contents in the following table. When it does, we inform you that it is not trouble of equipment, but it is indispensable for controlling and main-

taining of air conditioner.

Table 11-1-1

No.

Operation of air conditioner

When power breaker is turned “ON”, the operation indicator (Green) of the indoor unit flashes.

Compressor may not operate even if the room temperature is within range of compressor-ON.

In Dry and ECO mode, F AN (air flow) display does not change e ven though F AN (air flow select) button is operated.

Increasing of compressor motor speed stops approx. 30 seconds after operation started, and then compressor motor speed increases again approx. 30 seconds after.

In AUTO mode, the operation mode is changed.

Description

The OPERATION lamp of the indoor unit flashes when power source is turned on. If [ ] button is operated once, flashing stops. (Flashes also in power failure)

The compressor does not operate while compressor restart delay timer (3-minutes timer) operates. The same phenomenon is found after power source has been turned on because 3-minutes timer operates.

The air flow indication is fixed to [AUTO].

For smooth operation of the compressor, the compressor motor speed is restricted to Max. 41 rps for 2 minutes, and Max.91 rps for 2 minutes to 3 minutes , respectively after the operation has started.

After selecting Cool or Heat mode, select an operation mode again if the compressor keeps stop status for 15 minutes.

In HEAT mode, the compressor motor speed does not increase up to the maximum speed or decreases before the temperature arrives at the set temperature.

The compressor motor speed may decrease by hightemp. release control (Release protective operation by temp.-up of the indoor heat exchanger) or current release control.

– 68 –

Page 69

FILE NO. SVM-10001

11-2. Primary Judgment

To diagnose the troubles, use the following methods.

1) Judgment by flashing LED of indoor unit

2) Self-diagnosis by service check remote controller

3) Judgment of trouble by every symptom

Firstly use the method 1) for diagnosis. Then, use the method 2) or 3) to diagnose the details of troub les.

11-3. Judgment by Flashing LED of Indoor Unit

While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the contents of self-diagnosis are displayed with block on the indoor unit indication section.

Table 11-3-1

Indoor indication

lamp flashes.

Which lamp

does flash?

Item

Check

code

Block display Description for self-diagnosis

OPERATION (Green) Flashing display (1 Hz)

OPERATION (Green) Flashing display (5 Hz)

OPERATION (Green) TIMER (Yellow) Flashing display (5 Hz)

OPERATION (Green) FILTER (Orange) Flashing display (5 Hz)

OPERATION (Green) TIMER (Yellow) FILTER (Orange) Flashing display (5 Hz)

Power failure (when power is ON)

Protective circuit operation for indoor P.C. board

Protective circuit operation for connecting cable and serial signal system

Protective circuit operation for outdoor P.C. board

Protective circuit operation for others (including compressor)

NOTES :

1. The contents of items B and C and a part of item E are displayed when air conditioner operates.

2. When item B and C, and item B and a part of item E occur concurrently, priority is given to the b lock of item B.

3. The check codes can be confirmed on the remote controller for servicing.

– 69 –

Page 70

FILE NO. SVM-10001

11-4. Self-Diagnosis by Remote Controller (Check Code)

1. If the lamps are indicated as shown B to E in Table 11-3-1, ex ecute the self-diagnosis b y the remote controller.

2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condi-

tion and indicates the information of the self-diagnosis on the display of the remote controller with the check codes. If a fault is detected, all lamps on the indoor unit will flash at 5Hz and it will beep for 10 seconds (Beep, Beep, Beep ... ). The timer lamp usually flashes (5Hz) during self-diagnosis.

11-4-1. How to Use Remote Controller in Service Mode

Press [CHECK] button with a tip of pencil to set the remote controller to the service mode.

• “ ” is indicated on the display of the remote controller.

PR E S E T

ON E- TOU CH

QU IE T

S WIN G

TI ME R

SL E E P

C HK

TOSHIBA

FA N

TE MP

TEMP

MOD E

C OMF OR T

S LE E P

FI X Hi-P OW E R E C O

OF F

FI LT E R

C LO CK

Press [ON ] or [OFF ] button

If there is no fault with a code, the indoor unit will beep once (Beep) and the display of the remote controller will change as follows :

• • •

• The TIMER indicator of the indoor unit flashes continuously.

(5 times per 1 sec.)

• Check the unit with all 52 check codes ( to ) as shown in Table-11-4-1.

• Press [ON ] or [OFF ] button to change the check code backward.

CL R

SE T

If there is a fault, the indoor unit will beep for 10 seconds (Beep, Beep, Beep...).

Note the check code on the display of the remote controller.

• 2-digits alphanumeric will be indicated on the display.

• All indicators on the indoor unit will flash.

(5 times per 1 sec.)

Alphanumeric characters are used for the check codes. is 5. is 6. is A. is B. is C. is D.

Press [CLR] button. After service finish for clear

service code in memory.

• "7F" is indicated on the display of the remote

control.

Press [ ] button to release the service mode.

• The display of the remote controller returns to as it

was before service mode was engaged.

Fig. 11-4-1

– 70 –

Page 71

FILE NO. SVM-10001

11-4-2. Caution at Servicing

1. After servicing, press the [ ] button to return to the normal mode.

2. After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power

supply again so that memory in the microcomputer returns the initial status. Howe ver, the check codes are not deleted even if the power supply is turned off because they are stored in

the fixed memory.

3. After servicing, press [CLR] button under check mode status and then send the check code “7F” to the

indoor unit. The error code stored in memory is cleared.

Table 11-4-1

Block distinction

Check

code

Indoor P.C. board etc.

Not displayed

Connecting cable and serial signal

Block

Check

code

Operation of diagnosis function

Cause of operation

Short-circuit or disconnection of the room temperature sensor (TA sensor).

Being out of place, disconnection, shortcircuit, or migration of heat exchanger sensor (TC sensor)

Lock of indoor fan or trouble on the indoor fan circuit

Trouble on other indoor P.C. boards

Return serial signal is not sent to indoor side from operation started.

1) Defective wiring of connecting cable

2) Operation of compressor thermo Gas shortage Gas leak

Air

conditioner

status

Operation continues.

All off

Operation continues.

Remarks

Displayed when error is detected.

Flashes when trouble is detected on Return serial signal, and normal status when signal is reset.

Judgment and action

1. Check the room temp. sensor.

2. When the room temp. sensor is normal, check P.C. board.

1. Check heat exchanger sensor.

2. When heat exchanger sensor is normal, check P.C. board.

1. Check the motor.

2. When the motor is normal, check P.C. board.

Replace P.C. board.

1. When the outdoor unit never operate:

1) Check connecting cable, and

correct if defective wiring.

2) Check 25A fuse of inverter

P.C. board.

3) Check 3.15A of inverter P.C.

board.

2. To display [Other] block during operation, check compressor thermo. operation and supply gas (check gas leak also).

3. Unit operates normally during check. If return serial signal does not stop between indoor terminal 2 and 3, replace inverter P.C. board. If signal stops between indoor terminal 2 and 3, replace indoor P.C. board.

– 71 –

Page 72

Block distinction

Check

code

Block

Outdoor P.C. board

Not displayed

Outdoor P.C. board

Others (including compressor)

Check

code

Operation of diagnosis function

Cause of operation

Inverter over-current protective circuit operates. (Short time)

Position-detect circuit error or short-circuit between windings of compressor

Current-detect circuit error

Being out of place, disconnection or shortcircuit of the outdoor heat exchanger sensor (TE) or suction temp. sensor (Ts)

Disconnection or shortcircuit of discharge temp. sensor

Outdoor fan drive system error

Outdoor heat exchanger temp. sensor error

Compressor drive output error, Compressor error (lock, missing, etc.), Break down

Return serial signal has been sent when operation started, but it is not sent from halfway.

1) Compressor thermo. operation Gas shortage Gas leak

2) Instantaneous power failure

Compressor does not rotate. (Current protective circuit does not operate when a specified time passed after compressor had been activated.)

Discharge temp. exceeded 117°C

Break down of compressor

4-way valve inverse error (TC sensor value lowered during heating operation.)

All off

Operation continues

All off

Operation continues

All off

Operation continues

Air

conditioner

status

Remarks

Displayed when error is detected.

——

Displayed when error is detected.

Flashes when trouble is detected on return serial signal, and normal status when signal is reset.

Displayed when error is detected.

——

FILE NO. SVM-10001

Judgment and action

Even if trying operation again, all operations stop immediately. : Replace P.C. board.

1. Even if connecting lead wire of compressor is removed, position-detect circuit error occurred. : Replace P.C. board.

2. Measure resistance between wires of compressor, and perform short-circuit. : Replace compressor.

Even if trying operation again, all operations stop immediately. : Replace P.C. board.

1. Check sensors (TE, TS).

2. Check P.C. board.

1. Check discharge temp. sensor (TD).

2. Check P.C. board

Position-detect error, over-current protective operation of outdoor fan drive system, fan lock, etc. : Replace P.C. board or fan motor.

1. Check outdoor temp. sensor (TO).

2. Check P.C. board.

When 20 seconds passed after start-up, position-detect circuit error occurred. : Replace compressor. Trouble on P.M.V.

1. Repeat Start and Stop with interval of approx. 10 to 40 minutes. (Code is not displayed during operation.) Supply gas. (Check also gas leak).

2. Unit operates normally during check. If return serial signal does not stop between indoor terminal block 2 and 3, replace inverter P.C. board. If signal stops between indoor terminal block 2 and 3, replace indoor P.C. board.

1. Trouble on compressor

2. Trouble on wiring of compressor (Missed phase)

1. Check dischage temp. sensor (TD).

2. Gas leakage

3. Trouble on P.M.V.

1. Check power voltage. (220–230–240 V +10%)

2. Overload operation of refrigeration cycle Check installation condition (Short-circuit of outdoor diffuser).

1. Check 4-way valve operation.

– 72 –

Page 73

11-5. Judgment of Trouble by Every Symptom

11-5-1. Indoor Unit (Including Remote Controller)

(1) Power is not turned on (Does not operate entirely) <Primary check>

1. Is the supply voltage normal?

2. Is the normal voltage provided to the outdoor unit?

3. Is the crossover cable connected properly?

4. Is the fuse (F01) blown?

( RAS-10SKV2-E and RAS-13SKV2-E )

FILE NO. SVM-10001

Operation

Check Item

Considerable principle cause

Is fuse (F01)

of indoor control

board blown?

Is voltage

(DC12V or 5V)

indicated on rear of

indoor control board normal?

Turn off power supply once, and 5 second later, turn it on again.

Is OPERATION indicator flashing?

YES

Is it possible to turn on

power supply by pushing

[ ] button on

remote controller?

YES YES

Unit operates normally.

YES

Parts of a power supply circuit

defective.

Parts (R01, C01, C02,

R64, C27, DB01

T01) are defective.

Does transmission mark

NO NO

on remote controller flash

normally,and is its signal

transmitted properly?

Microcomputer

is defective.

Measures

Item by symptoms

Remote controller is defective.

Refer to (5) “Troubleshooting for remote controller”.

Replace main P.C. board

• Be sure to disconnect the motor connector CN31 after shut off the power supply, or it will be a cause of damage of the motor.

– 73 –

Page 74

(RAS-16SKV2-E)

FILE NO. SVM-10001

Operation

Check Item

Considerable principle cause

indicated on rear of

Is DC310–340V

supplied between

CN10 1 – 3 ?

Turn off power supply once, and 5 second later, turn it on again.

Is OPERATION indicator flashing?

Is fuse (F01)

of indoor control

board blown?

Is voltage

(DC12V or 5V)

indoor control

board normal?

Parts of a power supply circuit

YES

Is it possible to turn on

power supply by pushing

[ ] button on

remote controller?

YES YES

Unit operates normally.

YES YES

Parts (R01, R02, DB01, C01,

C03, IC11 and T101) are defective.

YES

defective.

Does transmission mark

NO NO

on remote controller flash

normally,and is its signal

transmitted properly?

Does fan

motor connector

between CN10 1 –

3 short-circuit?

Microcomputer

is defective.

Measures

Item by symptoms

Remote controller is defective.

Refer to (5) “Troubleshooting for remote controller”.

Replace main P.C. board

YES

Replace fan motor.

• Be sure to disconnect the motor connector CN31 after shut off the power supply, or it will be a cause of damage of the motor.

(2) Power is not turned on though Indoor P.C. board is replaced <Confirmation procedure>

Turn on power supply.

Does OPERATION indicator flash?

YES YES

Is wired correctly to white and

black lead wires of terminal block?

Correct wiring.

To item of

“Power supply is not turned on”.

– 74 –

Page 75

FILE NO. SVM-10001

(3) Only the indoor motor fan does not operate

1. Is it possible to detect the power supply voltage (AC220–240V) between Q and R on the terminal block?

2. Does the indoor fan motor operate in cooling operation? (In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned on, to prevent a cold air from blowing in.)

( RAS-10SKV2-E and RAS-13SKV2-E )

Turn off power supply once, and turn it on again.

Does fan motor

continue to operate?

Start to operate indoor unit in cooling operation at airflow level “LOW”.

Does indoor

fan operate?

YES

Change airflow level

Change airflow level to “HIGH”.

to “HIGH”.

YES

Control P.C. board failure

Dose AC120V or

higher voltage apply to

between red and black lead

of the motor?

YES

Turn OFF the power

Is it possible to

rotate cross-flow fan by

hand properly?

Replace main P.C. board.

Replace bearing.

Is it possible to

change airflow level

to “HIGH”?

YES

Fan motor operates normally.

Stop the operation

YES

Turn OFF the power

When rotating the

cross-flow fan by hand

at the operation stop

condition, is the rotation signal

(DC+12V 0V) detected between

2 (Purple lead) and 3

(Blue lead) of the motor

connector (CN33)

(1 pulse / 1 revolutio).

YES

Motor circuit (D301, IC31, Q301 12V power circuit (T01) failure.

– 75 –

Replace the fan motor.

Replace the P.C. board.

Page 76

( RAS-16SKV2-E )

Turn off power supply once, and turn it on again.

FILE NO. SVM-10001

Does fan motor

continue to operate?

Start to operate indoor unit in cooling operation at airflow level “LOW”.

Does indoor fan operate?

YES

Change airflow level to “HIGH”.

Is it possible to

change airflow level

to “HIGH”?

YES

Is it possible to detect

YES

DC 1V or more between

+ and 3 – of

motor connector (CN31).

YES

Is it possible to detect

DC 310–340V between

+ and 3 – of motor

connector (CN31).

YES

(Motor connection condition)

Is it possible to detect DC 15V

between 4 + and 3 – of

motor connector (CN31).

YES

Start to operate the

indoor unit in except

heating operation.

At this time, is it possible to

detect DC 1V or more between

+ and 3 – of motor

connector (CN31)?

YES

Is it possible to

rotate cross-flow fan by

hand properly?

YES

Turn off indoor unit and remove connector from motor.

Then push START/STOP button on remote controller to stop flashing lamp on indoor unit.

Is it possible to detect

DC 15V between 4 +

– of motor

and

connector (CN31).

Turn off indoor unit and

remove connector from motor. Then start to operate indoor unit with remote controller.

Start to operate the

indoor unit in except

heating operation.

At this time, is it possible

to detect DC 1V or more

between

of motor connector (CN31)?

within 15 seconds after

+ and 3 –

(Check this condition

starting unit.)

YES

Replace indoor fan motor.

Replace main P.C. board.

Replace bearing.

Fan motor operates normally.

Turn off indoor unit

and rotate cross-flow

fan by hand when the

unit is on standby.

At this time, is it possible to

detect DC 1V or more

between

+ and 3 –

of motor connector

(CN

31).

YES

– 76 –

Page 77

FILE NO. SVM-10001

(4) Indoor fan motor automatically starts to rotate by turning on power supply

(For DC fan motor in RAS-16SKV2-E) <Cause>

The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor. If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning

on power supply.

1. Remove the front panel. (Remove 2 screws.)

2. Remove the cover of the fan motor lead wires.

3. Check DC voltage with CN31 connector while the fan motor is rotating.

NOTE :

• Do not disconnect the connector while the fan motor is rotating.

• Use a thin test rod.

Indoor fan starts rotating when power supply is turned on.

(Check output DC voltage of fan motor on P.C. board.)

Measure voltage between 3 (GND : BLACK)

and 5 (V line : YELLOW) of motor connector (CN31)

while indoor fan motor is rotating.

DC 1.0V or more

P.C. board is defective.

Replace P.C. board. Replace motor.

Under DC 1.0V

Motor is defective.

Yellow

Black

P.C. board

CN31

6 (Blue) 5 (Yellow) 4 (White) 3 (Black) 2 – 1 (Red)

– 77 –

Page 78

(For AC fan motor in RAS-10,13SKV2-E)

1. Remove the front panel. (Remove 2 screws.)

2. Remove the cover of the fan motor lead wires.

3. Check AC voltage with CN31 connector while the fan motor is rotating.

NOTE :

• Using a tester, measure the resistance value of each winding coil.

• Use a thin test rod.

AFN-220-20-4D

• Do not disconnect the connector while the fan motor is rotating.

• For P.C. board side, proceed to the item "Only indoor fan does not operate"

of "Judgment of Trouble by Every Symptom".

WHI

CN31

BLK

RED

BLK

WHI

RED

BLK

WHI

RED

FILE NO. SVM-10001

CN33

P.C. board

BLU

PUR

GRY

BLU

PUR GRY

Position (P.C. board)

Between 3 (Black) - 1 (Red) Between 3 (Black) - 5 (White) Between 1 (Red) - 5 (White)

BLU

PUR

GRY

Resistance value

± 15 Ω

100

± 20 Ω

174

± 35 Ω

– 78 –

Page 79

FILE NO. SVM-10001

(5) Troubleshooting for remote controller <Primary check>

Check that A or B selected on the main unit is matched with A or B selected on the remote controller.

Is there direct

sunlight on the

receptor of the air

conditioner?

YES

Is there any

thyristor

fluorescent light

nearly?

YES

NO NO

Push the [ ] button.

Does the transmission

indicator blink?

Is operation

possible when the

transmitter is moved

nearer to the infrared

signal receiver of the

air conditioner?

YES

Battery life

There is no beep from the indoor unit The OPERATION lamp of the

air conditioner main unit does not light

Reset the remote control

by take off batteries

Push the [ ]

button

Avoid direct

sunlight.

Keep the air

conditioner away

from thyristor

fluorescent light.

Is operation possible

when setting the temporary switch of the air conditioner main unit

to “TEST RUN” or

“TEMPORARY AUTO”?

YES

Can any signal tone

be heard in a transistor

radio when transmitting

within 5 cm distance

from the radio?

YES

P.C. board is failure.

Replace

P.C. board

Replace the

batteries

indicator light?

Normal

Dose the

transmission

YES

Is there any

beep and

operation?

YES

Remote control

is failure.

Replace remote

control.

Note : Atter batteries replacement, short circuit the metal terminal

at the side of the battery compartment.

– 79 –

Page 80

FILE NO. SVM-10001

11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)

(1) Outdoor unit does not operate

1) Is the voltage between R and S of the indoor terminal block varied? Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the follow-

ing diagram.

NOTE:

• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.

• Be sure to prepare a diode for judgment.

Terminal block at indoor side

Red

White

Terminal block

S5277G

Tester

S5277G or equivalent (G or J type) (Diode with rated voltage of 400V or more is acceptable.)

Normal time

Voltage swings between DC15 and 60V. ...................Inverter Assembly check (11-

7-1.)

Abnormal time : Voltage does not vary.

(2) Outdoor unit stops in a little while after operation started <Check procedure> Select phenomena described below.

1) The outdoor unit stops 10 to 20 minutes after operation started, and 10 minutes or more are required to restart the unit.

Gas circulation amount is down.

Measure gas pressure.

Thermo. operation of compressor

Gas shortage Gas leak Pipe clogging

2) If the unit stops once, it does not operate until the power will be turned on again.

To item of Outdoor unit does not operate.

3) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed. (Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)

Gas leak P.M.V. is defective. Miswiring of connecting wires of indoor/outdoor units Clogging of pipe and coming-off of TC sensor

Refer to the chart in 11-6.

– 80 –

Page 81

11-6. How to Check Simple the Main Parts

1C 1E

Gas leakage, disconnection of TS/TC sensors (Check code 02, 1C)

Valve drive check

Discharge temp. error, gas leakage (Check code 03, 1E)

FILE NO. SVM-10001

Is coil of the pulse motor valve

(P.M.V.) correctly set?

YES

Is connecter of coil connected to inverter?

YES

from valve when the air conditioner starts the operation after turning off power

Is positioning sound of valve (sound hitting to stopper) heard

of the air conditioner once?

YES

Are temp. sensors of indoor/outdoor units correctly set to the holder?

NOTE :

The temperature sensors which are used to control pulse motor valve include indoor heat exchanger sensor (TC), outdoor heat exchanger temp. sensor (TE), outdoor suction temp. sensor (TS) and outdoor sensor (TO).

YES

Set it correctly.

Replace coil valve.

Set it correctly.

Gas amount check and valve clogging check

Remove TC sensor connector from the P.C. board in indoor unit. (Remove connector from the P.C. board.) Operate the air conditioner in COOL mode by TEMP button (“Beep” sound is heard if keeping pushed for 10 seconds.). The operation enters temporary operation mode which fixes opening degree of compressor speed. Check condensation at outlet of PMV, and then check operating pressure from the service port.

If there is condensation at outlet (1/4 inch=Ø6.35mm valve side),

Check the operating pressure from service port, and add gas if pressure is low.

Existence of condensation at outlet of P.M.V.

the valve is clogged.

YES

– 81 –

Replace valve.

Add gas.

Page 82

11-7. How to Diagnose Trouble in Outdoor Unit

11-7-1. Summarized Inner Diagnosis of Inverter Assembly

Table 11-7-1

FILE NO. SVM-10001

Diagnosis/Process flowchart Item

Preparation

Remove connector of compressor.

Check 25A fuse

(Part No.F01).

Check

terminal voltage

of electrolytic

capacitor.

Replace fuse.

Check

electrolytic

capacitor, diode

block (DB01),

etc.

Check

electrolytic

capacitor, diode

(DB01),

etc.

Check

Contents

Turn “OFF” the power supply breaker, and remove 3P connector which connects inverter and compressor.

• Check whether 25A fuse on the control board assembly is blown or not. (F01)

Summary

If fuse was blown, be sure to check the electrolytic capacitor and diode block. (DB01)

• Connect discharge resistance (approx. 100Ω, 40W) or soldering iron (plug) between +, – terminals of the electro-

lytic capacitor (500µF or 760µF) of C14 (with printed CAUTION HIGH VOLTAGE) on P.C. board.

Discharging position (Discharging period 10 seconds or more)

Plug of soldering iron

Does outdoor

fan rotate?

YES

Replace outdoor fan motor.

Remove connector

CN300 of outdoor fan

motor, and using a

tester, check resistance

value between every phases at motor side.

Operation

Measure-

ment

Check

Stop

Check

Measure-

ment

Turn on the power breaker, and operate the air conditioner in COOL mode by time shortening.

Measure terminal voltage of the electrolytic capacity.

500µF:400WV x 3 760

F:400WV x 3

After operation, turn off the power breaker after 2 minutes 20 seconds passed, and discharge the electrolytic capacitor by soldering iron. Check voltage between motor phases.

• Is not winding between

R‚ R-S

, or Q-S opened

or short-circuited?

• Is not frame grounded with , or S?

Q, R

OK if 500µF or 760µF → DC280 to 380V

Remove CN300 while pushing the part indicated by an arrow because CN300 is a connector with lock.

→ Resistance between

phases should be approx. 55 to 77Ω

→ Should be 10MΩ or

more.

– 82 –

Page 83

FILE NO. SVM-10001

Diagnosis/Process flowchart Item

Replace control board assembly.

Check

compressor

winding

resistance.

Replace

control board.

Replace

compressor.

Operation

Check

Contents

Check winding resistance between phases of compressor, and resistance between outdoor frames by using a tester.

• Is not grounded.

• Is not short-circuited

between windings.

• Winding is not opened.

Remove connector CN300 of the outdoor fan motor, turn on the power supply breaker, and perform the operation. (Stops though activation is prompted.)

Check operation within 2 minutes 20 seconds after activation stopped.

Summary

→ OK if 10MΩ or more



→ OK if 0.51Ω → 0.57Ω



(Check by a digital tester.)



11-8. How to Check Simply the Main Parts

11-8-1. How to Check the P.C. Board (Indoor Unit)

(1) Operating precautions

1) When removing the front panel or the P.C. board, be sure to shut off the power supply breaker.

2) When removing the P.C. board, hold the edge of the P.C. board and do not apply force to the parts.

3) When connecting or disconnecting the connectors on the P.C. board, hold the whole housing. Do not pull at the lead wire.

(2) Inspection procedures

1) When a P.C. board is judged to be defective, check for disconnection, burning, or discoloration of the copper foil pattern or this P.C. board.

2) The P.C. board consists of the following 2 parts

a. Main P.C. board part :

DC power supply circuit, Indoor fan motor control circuit, CPU and peripheral circuits, buzzer, and Driving circuit of louver.

b. Indication unit of infrared ray receiving infrared ray receiving circuit, LED :

To check defect of the P.C. board, follow the procedure described below.

– 83 –

Page 84

(3) Check procedures

( RAS-10,13SKV2-E )

FILE NO. SVM-10001

Table 11-8-1

No.

Turn off the power supply breaker and remove the P.C. board assembly from electronic parts base. Remove the connecting cables from the terminal block.

Remove the connector of the motor and turn on the power supply breaker. If OPERATION indicator flashes (once per second), it is not necessary to check steps (1 to 3) in the right next column.

Push [ ] button once to start the unit. (Do not set the mode to On-Timer operation.)

Shorten the restart delay timer and start unit.

Push [ ] button once to start the unit.

• Shorten the restart delay timer.

• Set the operation mode to

COOL.

• Set the fan speed level to AUTO.

• Set the preset temperature much lower than the room temperature. (The unit (compressor) operates continuously in the above condition.)

Procedure

Check points

Check whether or not the fuse (F01) is blown.

Check power supply voltage :

1. Between No. 1 and No. 3 of CN01 (AC 220–240V)

2. Between and of C27 (DC 310–340V)

3. Between 12V and GND

4. Between 5V and GND

Check power supply voltage :

1. Between CN51 and No. 1 of CN01 (DC 15–60V)

Check whether or not all indicators (OPERATION,TIMER,FILTER,PRE.DEF,

Hi POWER) are lit for 3 seconds and

they return to normal 3 seconds later.

1. Check whether or not the compressor operates.

2. Check whether or not the OPERATION indicator flashes.

Causes

Impulse voltage was applied or the indoor fan motor short-circuited.

1. The ter minal block or the crossover cable is connected wrongly.

2. The capacitor (C01), line filter (L01), resistor (R64), or the diode (DB01) is defective.

3. T01 is defective.

4. IC02 and T01 are defective.

IC51 and IC52 are defective.

The indicators are defective or the housing assembly (CN21) is defective.

1. The temperature of the indoor heat exchanger is extremely low.

2. The connection of the heat exchanger sensor is loose. (The connector is disconnected.) (CN62)

3. The heat exchanger sensor and the P.C. board are defective. (Refer to Table 11-4-1.)

4. The main P.C. board is defective.

If the above condition (No. 5) still continues, start the unit in the following condition.

• Set the operation mode to HEAT.

• Set the preset temperature much higher than room temperature.

Connect the motor connector to the motor and turn on the power supply. Start the unit the following condition.

• Set the fan speed level to HIGH. (The unit (compressor) operates continuously in the above condition in No. 5.)

1. Check whether or not the compressor operates.

2. Check whether or not the OPERATION indicator flashes.

1. Check it is impossible to detect the voltage (AC120V or higher

voltage) between red and black lead of the motor.

2. The motor does not operate or the fan motor does not rotate with high speed. (But it is possible to receive the

signal from the remote controller.)

3. The motor rotates but vibrates strongly.

– 84 –

1. The temperature of the indoor heat exchanger is extremely high.

2. The connection of the heat exchanger sensor short-circuited. (CN62)

3. The heat exchanger sensor and the P.C. board are defective. (Refer to Table 11-4-1.)

4. The main P.C. board is defective

1. The indoor fan motor is defective. (Protected operation of P.C. board.)

2. The P.C. board is defective.

3. The connection of the motor connector is loose.

Page 85

( RAS-16SKV2-E )

FILE NO. SVM-10001

Table 11-8-2

No.

Turn off the power supply breaker and remove the P.C. board assembly from electronic parts base. Remove the connecting cables from the terminal block.

Remove the connector of the motor and turn on the power supply breaker. If OPERATION indicator flashes (once per second), it is not necessary to check steps (1 to 3) in the right next column.

Push [ ] button once to start the unit. (Do not set the mode to On-Timer operation.)

Shorten the restart delay timer and start unit.

Push [ ] button once to start the unit,

• Shorten the restart delay timer.

• Set the operation mode to

COOL.

• Set the fan speed level to AUTO.

• Set the preset temperature much lower than the room temperature. (The unit (compressor) operates continuously in the above condition.)

Procedure

Check points

Check whether or not the fuse (F01) is blown.

Check power supply voltage :

1. Between No. 1 and No. 3 of CN01 (AC 220–240V)

2. Between and of C03 (DC 310–340V)

3. Between of C124 and output side of IC13 (DC 15V)

4. Between 12V and GND

5. Between 5V and GND

Check power supply voltage :

1. Between CN51 and No. 1 of CN01 (DC 15–60V)

Check whether or not all indicators (OPERATION,TIMER,FILTER,PRE.DEF

Hi POWER) are lit for 3 seconds and

they return to normal 3 seconds later.

1. Check whether or not the compressor operates.

2. Check whether or not the OPERATION indicator flashes.

Causes

Impulse voltage was applied or the indoor fan motor short-circuited.

1. The ter minal block or the crossover cable is connected wrongly.

2. The capacitor (C01), line filter (L01), resistor (R02), or the diode (DB01) is defective.

3. IC11, IC13 and T101 are defective.

4. IC11 and T101 are defective.

5. IC11, IC12 and T101 are defective.

IC51 and IC52 are defective.

The indicators are defective or the housing assembly (CN21) is defective.

1. The temperature of the indoor heat exchanger is extremely low.

2. The connection of the heat exchanger sensor is loose. (The connector is disconnected.) (CN62)

3. The heat exchanger sensor and the P.C. board are defective. (Refer to Table 11-4-1.)

4. The main P.C. board is defective.

If the above condition (No. 5) still continues, start the unit in the following condition.

• Set the operation mode to HEAT.

• Set the preset temperature much higher than room temperature.

Connect the motor connector to the motor and turn on the power supply. Start the unit the following condition.

• Set the fan speed level to HIGH. (The unit (compressor) operates continuously in the above condition in No. 5.)

1. Check whether or not the compressor operates.

2. Check whether or not the OPERATION indicator flashes.

1. Check it is impossible to detect the voltage (DC 15V) between 3 and 4 of the motor terminals.

2. The motor does not operate or the fan motor does not rotate with high speed. (But it is possible to receive the signal from the remote controller.)

3. The motor rotates but vibrates strongly.

– 85 –

1. The temperature of the indoor heat exchanger is extremely high.

2. The connection of the heat exchanger sensor short-circuited. (CN62)

3. The heat exchanger sensor and the P.C. board are defective. (Refer to Table 11-4-1.)

4. The main P.C. board is defective

1. The indoor fan motor is defective. (Protected operation of P.C. board.)

2. The P.C. board is defective.

3. The connection of the motor connector is loose.

Page 86

11-8-2. P .C . Board Layout

( RAS-10,13SKV2-E )

FILE NO. SVM-10001

+ 5V

[1] Sensor characteristic table

100

90 80 70 60 50 40 30

Resistance value (k )

20 10

0102030 4050

Temperature (˚C)

+ 12V

+12V

TA, TC, TO, TS

GND

TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TS : Suction temp. sensor

– 86 –

Page 87

( RAS-16SKV2-E )

FILE NO. SVM-10001

[1] Sensor characteristic table

100

90 80 70 60

+12V

GND

+5V

50 40 30

Resistance value (k )

20 10

0102030 4050

Temperature (˚C)

TA, TC, TO, TE, TS

TD : Discharge temp. sensor TO : Outdoor temp. sensor TE : Outdoor heat exchanger temp. sensor TS : Suction temp. sensor

– 87 –

Page 88

11-8-3. Indoor Unit (Other Parts)

FILE NO. SVM-10001

No.

Room temp. (TA) sensor

Part name

Heat exchanger (TC) sensor

23Remote controller

Louver motor MP24Z3T

4 Indoor fan motor

11-8-4. Outdoor Unit

No.

Compressor (Model : DA111A1F-20F1)

16SAV2-E

(Model : DA89X1C-23FZ)

10SAV2-E

(Model : DA89X1C-23FZ2)

13SAV2-E

Part name

Checking procedure

Disconnect the connector and measure the resistance value with tester. (Normal temp.)

Sensor

Temperature

TA, TC (kΩ)

10°C20°C25°C30°C40°C

20.7 12.6 10.0 7.9 4.5

Refer to 11-5-1. (5). Measure the resistance value of each winding coil by using the tester.

(Under normal temp. 25°C)

White Yellow Yellow Yellow Yellow

Position

1 to 2 1 to 3 1 to 4 1 to 5

Resistance value

250 ± 20Ω

Refer to 11-5-1. (3) and (4).

Checking procedure

Measure the resistance value of each winding by using the tester.

Red

White Blac

Position

Red - White

White - Black

Black - Red

Resistance value

DA111A1F-20F1

0.88 to 0.98Ω

DA89X1C-1F-23FZ



1.04 to 1.16Ω

Under 20ºC

Outdoor fan motor (Model : ICF-140-43-4R)

4-way valve coil (Model : VHV)

10SAV2-E, 16SAV2-E

(Model : STF)

13SAV2-E

Pulse motor valve coil (Model : C12A-01-A)

10SAV2-E, 16SAV2-E

(Model : CAM-MD12TCTH-2)

13SAV2-E

Outdoor temperature sensor

(TO), discharge temperature sensor (TD), suction temperature sensor (TS), outdoor heat exchanger temperature sensor (TE)

Measure the resistance value of winding by using the tester.

Red

White Blac

Position

Red - White

White - Black

Black- Red

Resistance value

20 to 22Ω 20 to 22Ω 20 to 22Ω

Measure the resistance value of winding by using the tester.

Resistance value

1435 ± 144Ω

Under 20°C

Measure the resistance value of winding by using the tester.

COM

1 6

Position

Gray - White

Gray - Orange

Red- Yellow

COM

YWR BL

254

Red- Blue

Resistance value

43 to 49Ω 43 to 49Ω 43 to 49Ω 43 to 49Ω

Under 20°C

Disconnect the connector, and measure resistance value with the tester. (Normal temperature)

Sensor

Temperature

TD (kΩ)

TO,TS,TE (kΩ)

10°C20°C25°C30°C40°C50°C

100 64 50 41 27 18

20.7 12.6 10.0 7.9 4.5 —

– 88 –

Page 89

11-8-5. Checking Method for Each Part

Mark

No. Part name Checking procedure

1 Electrolytic capacitor 1. Turn OFF the power supply breaker.

(For raising pressure, smoothing) 2. Discharge all three capacitors completely.

3. Check that safety valve at the bottom of capacitor is not broken.

4. Check that vessel is not swollen or exploded.

5. Check that electrolytic liquid does not blow off.

6. Check that the normal charging characteristics are show in continuity test by the tester.

FILE NO. SVM-10001

C12 C13

Heat sink IGBT side

C14

MCC-5009

Soldered surface

C12, C13, C14 → 500µF or 760µF/400V

2 Converter module 1. Turn OFF the power supply breaker.

2. Discharge all three capacitors completely.

3 Check that the normal rectification characteristics are shown in continuity

test by the tester.

Case that product is good

Pointer swings once, and returns slowly. When performing test once again under another polarity, the pointer should return.

Diode check

Tester rod

Resistance value in good product

50kΩ or more

(0Ω in trouble)

– 89 –

Page 90

FILE NO. SVM-10001

11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

1. Symptom

• Outdoor fan motor does not rotate.

• Outdoor fan motor stops within several tens seconds though it started rotating.

• Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc. Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”

2. Cause

The following causes are considered when the outdoor fan motor does not normally rotate.

1) Mechanical lock of the outdoor fan motor

2) Winding failure of the outdoor fan motor

3) Position-detect circuit failure inside of the outdoor fan motor

4) Motor drive circuit failure of the outdoor P.C. board

3. How to simply judge whether outdoor fan motor is good or bad

Turn OFF the breaker.

Disconnect two connectors (CN300) of the

outdoor fan motor from the outdoor P.C. board.

Does the fan rotate without trouble

when rotating it with hands?

YES

If the resistance value between 1 (Red lead) – 2 (White lead) 2 (White lead) – 3 (Black lead) 3 (Black lead) – 1 (Red lead)

of the connector (CN300 : Motor winding) is 17 to 25Ω, it is normal.

YES

Fan motor is normal.

(Outdoor P.C. board error)

CN300

Fan motor error

NOTE :

However, GND circuit error inside of the motor may be accepted in some cases when the above check is performed.

When the fan motor does not become normal even if P.C. board is replaced, replace the outdoor fan motor.

– 90 –

Page 91

FILE NO. SVM-10001

12. HOW TO REPLACE THE MAIN PARTS

WARNING

• Since high voltages pass through the electrical parts, turn off the power without fa il before proceeding with the repairs.

Electric shocks may occur if the power plug is not disconnected.

• After the repairs have been completed (after the front panel and cabinet have been installed), perform a test run, and check for smoking, unusual sounds and other abnormalities.

If this check is omitted, a fire and/or electric shocks may occur. Before proceeding with the test run, install the front panel and cabinet.

• Ensure that the following steps are taken when doing repairs on the refrigerating cycle.

1. Do not allow any naked flames in the surrounding area.

If a gas stove or other appliance is being used, extinguish the flames before proceeding. If the flames are not extinguished, they may ignite any oil mixed with the refrigerant gas.

2. Do not use welding equipment in an airtight room.

Carbon monoxide poisoning ma y result if the room is not properly ventilated.

3. Do not bring welding equipment near flammable objects.

Flames from the equipment may cause the flammable objects to catch fire .

• If keeping the power on is absolutely unavoidable while doing a job such as inspecting the cir-

cuitry, wear rubber gloves to avoid contact with the live parts.

Electric shocks may be received if the live parts are touched. High-voltage circuits are contained inside this unit.

Proceed very carefully when conducting checks since directly touching the parts on the control circuit board may result in electric shocks.

12-1. Indoor Unit

No.Part name

Front panel

Procedures

1) Stop operation of the air conditioner and turn off its main power supply.

2) Open the air inlet grille, push the arm toward the outside, and remove the grille.

3) Remove the left and right air filters.

Remarks

– 91 –

Page 92

FILE NO. SVM-10001

No.Part name

Front panel

Procedures

4) Press "PUSH" part under the front panel and remove hooks of the front panel from the installation plate.

5) Remove the front panel fixing screws. (2 pcs.)

6) Take off three hooks of panel from rear side.

Remarks

Installation plate

Front panel

Press

2 Screws

Three hooks

1) Press three center positions and two lower center positions of the air outlet, and

then hang the hanging hooks (3 pcs.) at the top side of the front panel to the rear plate.

2) Tighten two screws.

• Incomplete hanging or incomplete pressing may cause a dewdrops or generation

of a fluttering sound.

– 92 –

Page 93

FILE NO. SVM-10001

No.



Part name

Electric parts box assembly

Procedures

1) Follow the procedure up to 3) in  above.

2) Remove screw of earth lead attached to the end plate of the ev apor ator.

3) Remove the lead wire cover, and remove connector for the fan motor and connector for the louver motor from the electric parts box assembly.

4) Pull out TC sensor from sensor holder of the evaporator.

5) Disengage the display unit by simply pushing at the top of the display unit.

) Remove the fixing screw that secures the

electric parts box assembly, and remove the

assembly.

TC sensor

Earth Screw

Remarks

Electric part box cove

Fan motor connector

1) Hook the top part of the electric parts box assembly onto the claws on the back body,

Now attach the display unit. Connect the connectors for the fan motor and louver motor.

2) Secure the grounding wire using the fixing screw. Insert the TC sensor into the sensor holder.

* Be absolutely sure to loop the grounding

wire and TC sensor leads once at the bottom.

Fixing screw

Louver motor

connecto

AC fan motor

connector

(For RAS-10,

13 models only)

– 93 –

Page 94

FILE NO. SVM-10001

No.





Part name

Horizontal louver

Evaporator (Heat exchanger)

Procedures

1) Remove shaft of the horizontal louver from the back body. (First remove the left shaft, and then remove other shafts while sliding the horizontal louver leftward.)

1) Follow to the procedure in the item .

2) Remove the pipe holder from the rear side of the main unit.

3) Remove two fixing scre ws at the left side of the end plate of the heat exchanger.

2 screws

Remarks

4) Remove one fixing screw on the heat exchage fixing holder to separate the heat exchage from the back body.

5) Remove right side of the end plate from two fixing rib while sliding slightly the heat exchanger rightward.

Heat exchanger fixing

holder

Rib on the right side of the end plate

Screw

– 94 –

Page 95

FILE NO. SVM-10001

No. Part name

Bearing



Procedures

1) Follow to the procedure in the item .

2) Remove the two screws used to secure the

bearing base.

3) Remove the bearing base.

• If the bearing is out from the housing, push it into the specified position and then incorporate it in the main body.

…

Remarks

Two screws

Bearing

Bearing base

– 95 –

Page 96

FILE NO. SVM-10001

No.



Part name

F an motor

Procedures

1) Follow to the procedure till item .

…

2) Loosen the set screw of the cross flow fan.

3) Remove two fixing screws of the motor cover

and them remove the motor cover.

4) Remove two more fixing screws of the motor band and remove the motor band.

Two screws

Remarks

Set screw

Two screws on

motor band

Motor cover

5) Pull the fan motor outward.

– 96 –

Page 97

FILE NO. SVM-10001

No.



Part name

Cross flow fan

Procedures

1) To incorporate the fan motor, remove the fan

motor rubber (at shaft core side), incorporate the motor into the position in the following figure, and then install the fan motor.

• Install the cross flow fan so that the right end of the 1st joint from the right of the cross flow fan is set keeping 70.5 mm from wall of rear plate of the main unit.

• Holding the set screw, install the cross flow fan so that U-groove of the fan motor comes to the mounting hole of the set screw.

Remarks

5 mm

• Perform positioning of the fan motor as follows:

• When assembling the fan motor, the fan motor must be installed in such a way that the fan motor leads will be taken out is positioned at the bottom front.

• After assembling the two hooking claws of the motor band (right) into the main body, position the fan motor, insert it, and then secure the motor band (right) using the two fixing screws.

U groove

– 97 –

Page 98

12-2. Microcomputer

FILE NO. SVM-10001

No.



Part name

Common procedure

Procedure

1) Turn the power supply off to stop the operation of air-conditioner .

2) Remove the front panel.

• Remove the 2 fixing screws.

3) Remove the electrical part base.

Remarks

Replace terminal block, microcomputer ass’y and the P.C. board ass’y.

– 98 –

Page 99

12-3. Outdoor Unit

FILE NO. SVM-10001

No.Part name

Common procedure

Procedure

1. Detachment

NOTE

Wear gloves for this job. Otherwise, you may injure your hands on the parts, etc.

1) Stop operation of the air conditioner, and turn off the main switch of the breaker for air conditioner.

2) Remove the valve cover . (ST1TØ4 × 10L 2

pcs.)

• After removing screw, remove the

valve co ver pulling it downward.

3) Remove cord clamp (ST2

pcs.), and then remove connecting

TØ4 × 14L

cable.

4) Remove the upper cabinet. (ST1TØ4 × 10L 5 pcs.)

• After removing screws, remove the

upper cabinet pulling it upward.

Remarks

Upper cabinet

Waterproof cover

2. Attachment

1) Attach the water-proof cov e r.

NOTE

The water-proof co ver must be attached without fail in order to prevent rain water, etc. from entering inside the indoor unit.

2) Attach the upper cabinet. (ST1TØ4 ×

10L 5 pcs.)

3) Perform cabling of connecting cab le, and attach the

Fix the cord clamp by tightening

•

cord clamp.

the screws (ST2T∅4 x 14L 3 pcs.), fitting 2 concave parts of the cord clamp to each connecting cables.

4) Attach the valve cover.

(ST1T∅4 x 10L 2 pcs.)

• Insert the upper part into the square

hole of the side cabinet, set hook

claws of the valve cover to square

holes (at three positions) of the main

unit, and attach it pushing upward,

These 2 bending parts shall be put inside of a unit by bending these 2 ports.

This part shall be put on the side cabinet.

Fit the corner of the water

This line shall be pavallel to the front cabinet

This part shall cover the gap between the inverter box and the front cabinet.

How to mount the water-proof cover

proof cover to the corner of the front cabinet.

– 99 –

Page 100

FILE NO. SVM-10001

No.Part name

Front cabinet

Procedure

1. Detachment

1) Perform step 1 in .

2) Remove the fixing screws (ST1TØ4 × 10L 2 pcs.) used to secure the front cabinet and inverter cover, the screws (ST1TØ4 × 10L 4

pcs.) used to secure the front cabinet at the bottom, and the fixing screws (ST1TØ4 × 10L 2 pcs.) used to secure the motor base.

• The front cabinet is fitted into the side

cabinet (left) at the front left side so pull up the top of the front cabinet to remove it.

2. Attachment

1) Insert the claw on the front left side into the side cabinet (left).

2) Hook the bottom part of the front right side onto the concave section of the bottom plate. Insert the claw of the side cabinet (right) into the square hole in the front cabinet.

3) Return the screws that were removed above to their original positions and attach them.

Remarks

Front cabinet

Cla

Square hole

Concave section

– 100 –

Toshiba RAS-13SKV2-E, RAS-10SAV2-E, RAS-10SKV2-E, RAS-16SKV2-E, RAS-16SAV2-E INSTALLATION MANUAL

Specifications and Main Features

Frequently Asked Questions

User Manual

2. SPECIFICATIONS

4. CONSTRUCTION VIEWS

5. WIRING DIAGRAM

6. SPECIFICATIONS OF ELECTRICAL PARTS

7. REFRIGERANT CYCLE DIAGRAM