Toshiba RAS-18SAV-E2 user guide manual

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SERVICE MANUAL

Indoor Unit

FILE NO. A07-008

SPLIT TYPE

RAS-18SKV-E RAS-22SKV-E RAS-18SKVR-E

RAS-22SKVR-E

Outdoor Unit

RAS-18SAV-E RAS-22SAV-E

R410A

Printed in Japan, Feb., 2008

CONTENTS

1. SAFETY PRECAUTIONS .......................................................................... 2

2. SPECIFICATIONS ..................................................................................... 4

3. REFRIGERANT R410A ............................................................................. 7

4. CONSTRUCTION VIEWS ........................................................................ 15

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

6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 19

7. REFRIGERANT CYCLE DIAGRAM ........................................................ 20

8. CONTROL BLOCK DIAGRAM ................................................................ 23

9. OPERATION DESCRIPTION................................................................... 26

10. INSTALLATION PROCEDURE ................................................................ 51

11. HOW TO DIAGNOSE THE TROUBLE...................................................... 64

12. HOW TO REPLACE THE MAIN PARTS................................................... 86

13. EXPLODED VIEWS AND PARTS LIST ................................................. 103

– 1 –

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 TO 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 INSTALLATION. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

– 2 –

• 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 performed 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.

– 3 –

2-1. Specifications

(kW)

(A)

(W)

(%)

(A)

(W)

(%)

(A)

(

)

(

)

(

)

(

)

ght

(mm)

(mm)Depth(mm)

(kg)

(W)

(

)

ght

(mm)

(mm)Depth(mm)

(kg)

(W)Typ

put

(W)

(

)

gTyp

(mm)

(m)

(kg)

(

∅

2. SPECIFICATIONS

Unit model Indoor

Outdoor

capacit

Coolin Cooling capacity range Heating capacit Heating capacity range Power suppl Electric Indoor Operation mode Coolin characteristic Running curren

Power consum Power factor

Outdoor O

COP 3.52 3.72 3.52 3.72 Sound Pressure Indoor H/M/ level Outdoor H

ower Indoor H/M/

Sound level Outdoor H Indoor uni

Outdoor unitUnit model

Pipin connection Indoor uni

Refrigeran

Wirin connection Interconnection Usable tem

ccessor

Unit model Dimension Hei

Net weigh Fan motor outpu

ir flow rate

Dimension Hei

Net weigh Compressor Motor outpu

Fan motor out

ir flow rate

Outdoor unitLiquid side

Maximum length Maximum chargeless length Maximum height difference Name of refrigeran Weigh Power suppl

erature range Indoor(Cooling/Heatin

Indoor unitInstallation plate

Outdoor uni

eration mode Coolin Running curren Power consum Power factor Startin

Width

Model

Liquid side Gas side

Gas side

Outdoor

Wireless remote controller Batteries Remote controller holder

er Oxi Deo filter

er Sterilizer filter

Su Mountin Remote controller holder

Pan head wood screw Plasma air Installation manual Owner's manual Drain nipple Water-

tion

curren

Cooling/Heatin

screw

urifier

roof rubber ca

dB-A dB-A dB-A dB-A

m3/min

(°C) (°C)

RAS-18SKV-E RAS-18SKVR-E RAS-18SAV-E RAS-18SAV-E

5.0 5.0

1.1-6.0 1.1-6.0

5.8 5.8

0.8-6.3 0.8-6.3

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

Heatin

0.30-0.28 0.30-0.28 0.30-0.28 0.30-0.28 40 40 40 40 60 60 60 60

Heatin

6.40-5.87 6.98-6.40 6.40-5.87 6.98-6.40

1380 1520 1380 1520

98 99 98 99

7.28-6.68 7.28-6.68

44/38/32 44/39/32 44/38/32 44/39/32

49 50 49 50

59/53/47 59/54/47 59/53/47 59/54/47

64 65 64 65

RAS-18SKV-E RAS-18SKVR-E

320

1050

228

13 30

15.9/16.5

RAS-18SAV-E RAS-18SAV-E

550 780 290

1100

Twin rotary type with DC-inverter variablespeed control

DA130A1F-27F DA130A1F-27F

31.9/31.9

Flare connection Flare connection

6.35

12.70

6.35

12.70 20 15 10

R410

1.40 3Wires:includes earth(Outdoor)

4Wires:includes earth

21~32/ ~28 21~32/ ~28

-10~46/-15~24 -10~46/-15~24 1 1 2 1 2 2

4x25L)

2(∅3.1Lx16L)

1 1 1 2

Coolin

2(∅3.1Lx16L)

Heatin

320

1050

228

13 30

15.7/16.2

550 780 290

1100

31.9/31.9

∅6.35

∅12.70

∅6.35

∅12.70

20 15 10

R410

1.40

1 1 2 1 2

6(∅4x25L)

1 1 1 1 2

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

– 4 –

Unit model Indoor

(

)

(

)

(

)

(

)

∅

Outdoor Cooling capacit Cooling capacity range (kW) Heating capacit Heating capacity range (kW) Power suppl Electric Indoor Operation mode Cooling Heating Cooling Heating characteristic Running curren

Power consumption (W) 50 50 50 50 Power factor (%)60606060

Outdoor Operation mode Cooling Heating Cooling Heating

Running curren Power consumption (W) 1945 2000 1945 2000 Power factor (%)99999999

Starting curren COP 3.01 3.41 3.01 3.41 Sound Pressure Indoor H/M/ level Outdoor H

ower Indoor H/M/

Sound level Outdoor H Indoor uni

Outdoor uni

Piping Type connection Indoor uni

Refrigeran

Wiring Power suppl connection Interconnection Usable temperature range Indoor (Cooling/Heating) (°C)

ccessor

Unit model Dimension Heigh

Width (mm)

Depth (mm)

Net weigh Fan motor outpu

ir flow rate (Cooling/Heating) (m3/min) Unit model Dimension Heigh

Width (mm)

Depth (mm) Net weigh Compressor Motor outpu

Type

Model Fan motor outpu

ir flow rate (Cooling/Heating) (m3/min)

Liquid side (mm)

Gas side (mm) Outdoor uni

Maximum length (m) Maximum chargeless length (m) Maximum height difference (m) Name of refrigeran Weigh

Indoor unitInstallation plate

Outdoor uni

Liquid side (mm)

Gas side (mm)

Outdoor (Cooling/Heating) (°C)

Wireless remote controller

Batteries

Remote controller holder

Super Oxi Deo filter

Super Sterilizer filter

Mounting screw

Remote controller holder

Pan head wood screw

Plasma air purifier

Installation manual

Owner's manual

Drain nipple

Water-proof rubber cap

(kW)

(A) 0.38-0.35 0.38-0.35 0.38-0.35 0.38-0.35

(A) 8.93-8.19 9.18-8.42 8.93-8.19 9.18-8.42

(A)

dB-A dB-A dB-A dB-A

(mm)

(kg)

(W)

(mm)

(kg)

(W)

(kg)

RAS-22SKV-E RAS-22SKVR-E RAS-22SAV-E RAS-22SAV-E

6.0 6.0

1.2-6.7 1.2-6.7

7.0 7.0

1.0-7.5 1.0-7.5

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

9.56-8.77 9.56-8.77

47/41/35 47/42/35 47/41/35 47/42/35

52 51 52 51

62/56/50 62/57/50 62/56/50 62/57/50

67 66 67 66

RAS-22SKV-E RAS-22SKVR-E

320

1050

228

13 30

18.0/18.3

RAS-22SAV-E RAS-22SAV-E

550 780 290

1100

Twin rotary type with DC-inverter variablespeed control

DA150A1F-20F DA150A1F-20F

37.2/33.7

Flare connection Flare connection

6.35

12.70

6.35

12.70 20 15 10

R410A

1.40 3Wires:includes earth(Outdoor)

4Wires:includes earth

21~32/ ~28 21~32/ ~28

-10~46/-15~24 -10~46/-15~24 1 1 2 1 2 2

4x25L)

2(∅3.1Lx16L)

1 1 1 2

320

1050

228

13 30

17.7/18.0

550 780 290

1100

37.2/33.7

∅6.35

∅12.70

∅6.35

∅12.70

20 15 10

R410A

1.40

1 1 2 1 2

6(∅4x25L)

2(∅3.1Lx16L)

1 1 1 1 2

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

– 5 –

2-2. Operation Characteristic Curve

<Coolin

10.00

9.00

8.00

7.00

6.00

5.00

Current (A)

4.00

3.00

2.00

1.00

0.00

><Heatin

10.00

9.00

RAS-22SKV-E RAS-22SKVR-E

RAS-18SKV-E RAS-18SKVR-E

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

Compressor Speed (RPS)

8.00

7.00

6.00

5.00

Current (A)

4.00

3.00

2.00

1.00

0.00

RAS-22SKV-E RAS-22SKVR-E

RAS-18SKV-E RAS-18SKVR-E

0 102030405060708090100110120

Compressor Speed (RPS)

2-3. Capacity Variation Ratio Accordin

<Coolin

><Heatin

105

100

Capacity Ratio (%)

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

RAS-18SKV-E RAS-18SKVR-E RAS-22SKV-E RAS-22SKVR-E

Condition Indoor: DB27

Indoor Air-Flow Volume: Ｈｉｇｈ Pipe Length: 7.5m

Capacity Ratio: 100%=

5.0kW (RAS-18SKV-E, RAS-18SKVR-E)

6.0kW (RAS-22SKVＲ-E, RAS-22SKVR-E)

C / WB19oC

Outdoor Temperature (oC)

to Temperature

120

100

RAS-18SKV-E

Capacity Ratio (%)

-15 -10 -5 0 5 10

RAS-18SKVR-E RAS-22SKV-E RAS-22SKVR-E

Condition Indoor: DB20

Indoor Air-Flow Volume: High Pipe Length: 7.5m

Capacity Ratio: 100%=

5.8kW (RAS-18SKV-E, RAS-18SKVR-E)

7.0kW (RAS-22SKVR-E, RAS-22SKVR-E)

Outdoor Temperature (oC)

– 6 –

3. REFRIGERANT R410A

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 level.

If the refrigerant gas leakage occurs and its concentration exceeds the marginal level, 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 must 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.

– 7 –

Table 3-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

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 socket 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 may occur. Carefully remove all burrs and clean the cut surface before installation.

c) Insertion of Flare Nut

– 8 –

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 “dimension 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

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

0.8

1.0

0 to 0.5

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

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

1.0

Flare tool for R22

clutch type

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

16.0 16.6 12.9 23

19.0 19.7 16.0 25

– 9 –

Flare nut width

(mm)

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

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

16.0 16.2 12.9 20

19.0 19.7 16.0 23

23.3 24.0 19.2 34

43 to 45

Flare nut width

(mm)

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 tightening torque, comply with values designated by manufacturers. 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)

– 10 –

16 (160), 18 (180)

42 (420)

55 (550)

65 (650)

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 prevent 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 exclusive for R410A, but can be also used for conventional 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

Conventional air-water heat pump installation

Whether new equipment can be used with conventional refrigerant

Yes

*(Note 1)

Yes

No.

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

Usage

Pipe flaring

Flaring by conventional flare tool

Connection of flare nut

Evacuating, refrigerant charge, run check, etc.

Vacuum evacuating

Refrigerant charge

Gas leakage check

Refrigerant charge

air-water heat pump installation

Existence of new equipment for R410A

Ye s

*(Note 2)

R410A

Whether conventional equipment can be used

*(Note 1)

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

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

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

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

– 11 –

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

– 12 –

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 ]

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Gauge manifold

OUTDOOR unit

cylinder

Refrigerant

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.

– 13 –

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 oxide 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

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 prevent 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 m

/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

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

– 14 –

4-1. Indoor Unit

RAS-18SKVR-E

RAS-22SKVR-E

4. CONSTRUCTION VIEWS

320

153.5

132

109

132

235 215 215

215.5

262.5

235

262.5

– 15 –

4-2. Indoor Unit

RAS -18SKV-E

RAS -22SKV-E

153.5

132

109

132

235 215 215

320

215.5

262.5

235

262.5

– 16 –

4-3. Outdoor Unit

69.5

147

A leg part

290

550

Anchor bolt

306

dia.7 hole pitch

long hole pitch

B leg part

483

449

32 500

dia.436

Drain long hole

320

600 90

483 257

108

780

dia.11-14U-shape hole (for dia.8-10 anchor bolt)

8-dia.7 hole

(for fixing outdoor unit)

dia.11x14 long hole

(for dia.8-10 anchor bolt)

Packed valve cover

Fan guard

Connecting pipe port

(Pipe dia.6.35)

Charging port

4-dia.4.5 embossment

137

157

143

342

Connecting pipe port

(Pipe dia.12.7)

145

(2-dia.11x14 U-shape hole)

Intake

320

100 or more

200 or more

Mounting dimensions of anchor bolt

Drain hole

125108

320

600 54 38

Outside line of product

Detailed A leg part

320

38 54

600

2-dia.7 hole

Outside line of product

Detailed B leg part

Fin guard

Z View

600

50 or more

Outlet

Intake

Outside line of product

250 or more

Minimum distance

from wall

(2-dia.11x14 long hole)

When installing the outdoor unit, leave open in at least two of directions (A),(B),(C)and(D) shown in the figure below.

)(

– 17 –

5. WIRING DIAGRAM

5-1. RAS-18SKV-E / RAS-18SAV-E, RAS-22SKV-E / RAS-22SAV-E

RAS-18SKVR-E / RAS-18SAV-E, RAS-22SKVR-E / RAS-22SAV-E

COMPRESSOR

SKVR-E only

1 1 2 2 3

YEL

BRW

YEL

121

P04

RED

P05

WHI

P06

BLK

P25

P24

P23

P22

P21

P20

P35

P34

PUR

Q200 205 IGBT

R221

R220

R219

POWER RELAY

66 5

PMV

33 22 1

C13

L03

AC250V

RELAY

21 2

COIL FOR 4WAY VALVE

CN602

CN601

CN600

3 3

121

(SUCTION PIPE

TEMP. SENSOR)

121

3 3 2 1

212 1 1

(OUTDOOR

TEMP. SENSOR)

(DISCHARGE PIPE

TEMP. SENSOR)

(CONDENSER PIPE

TEMP. SENSOR)

Heat Exchanger

GRN&YEL

– 18 –

6-1. Indoor Unit

6. SPECIFICATIONS OF ELECTRICAL PARTS

No.

Fan motor

(for indoor)

2 Room temp. sensor (TA-sensor) 3 Heat exchanger temp. sensor (TC-sensor) 4 Louver motor Output (Rated) 1W, 16 poles, DC12V

Parts name

18SKV-E, 18SKVR-E 22SKV-E, 22SKVR-E

ICF-340-30-2* DC-340V,30W

( − ) ( − )

MP24Z3T

10kΩ at 25°C 10kΩ at 25°C

SpecificationsType

6-2. Outdoor Unit

No.

1 Reactor L = 10mH, 16A

2 Outdoor fan motor DC140V, 43W

3 Suction temp. sensor (TS sensor)

Parts name Model name Rating

CH-57

ICF-140-43-4R

(Inverter attached)

10kΩ (25°C)

4 Discharge temp. sensor (TD sensor)

5 Outside air temp. sensor (TO sensor)

6 Heat exchanger temp. sensor (TE sensor)

7 Terminal block

Compressor 3-phases 4-poles

9 COIL FOR P.M.V. DC12V

10 Coil for 4-way valve AC220-240V

(6P) 20A, AC250V

18SAV-E

22SAV-E

(Inverter attached)

DA130A1F-27F

DA150A1F-20F

CAM-MD12TF-10

STF

62kΩ (20°C)

10kΩ (25°C)

1100W

– 19 –

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-18SKV-E / RAS-18SAV-E

RAS-18SKVR-E / RAS-18SAV-E

INDOOR UNIT

Indoor heat

exchanger

Temp. measurement

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe

Outer dia. : 12.7mm

Thickness : 0.8mm

4-way valve (STF-0108Z)

Accumulater tank

Cross flow fan

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

Sectional shape of heat insulator

Muffler

Compressor

DA130A1F-27F

Outdoor heat

exchanger

Split capillary 2 - Dia1.2 x 80

Allowable height

difference : 10m

Strainer

Pulse Modulating valve at liquid side (CAM-B22YGTF-3)

Max. : 20m

Min. : 2m Chargeless : 15m

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

Allowable pipe length

DISTRIBUTOR

Propeller fan

OUTDOOR UNIT

NOTE :

Refrigerant amount : 1.40kg

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)

– 20 –

RAS-22SKV-E / RAS-22SAV-E RAS-22SKVR-E / RAS-22SAV-E

INDOOR UNIT

Indoor heat

exchanger

Temp. measurement

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe

Outer dia. : 12.7mm

Thickness : 0.8mm

4-way valve (STF-0213Z)

Accumulater tank

Muffler

Compressor

DA150A1F-20F

Outdoor heat

exchanger

Cross flow fan

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

Sectional shape of heat insulator

Split capillary

4-Dia 2 x 66

Allowable height

difference : 10m

Strainer

Pulse Modulating valve at liquid side (CAM-B22YGTF-3)

Max. : 20m

Min. : 2m Chargeless : 15m

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

Allowable pipe length

DISTRIBUTOR

Propeller fan

OUTDOOR UNIT

NOTE :

Refrigerant amount : 1

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

.40kg

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)

– 21 –

7-2. Operation Data

Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor

condition(°C) RAS- pressure pipe temp. fan mode fan mode revolution

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

27/19 35/- 18SKV-E 0.9 to 1.1 11 to 13 40 to 42 High High 67

18SKVR-E 0.9 to 1.1 11 to 13 40 to 42 High High 67

22SKV-E 0.9 to 1.1 11 to 13 41 to 43 High High 77

22SKVR-E 0.9 to 1.1 11 to 13 41 to 43 High High 77

Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor

condition(°C) RAS- pressure pipe temp. fan mode fan mode revolution

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

20/- 7/6 18SKV-E 2.5 to 2.6 40 to 42 1 to 3 High High 79

18SKVR-E 2.5 to 2.6 40 to 42 1 to 3 High High 79

22SKV-E 2.6 to 2.8 42 to 44 0 to 2 High High 84

22SKVR-E 2.6 to 2.8 42 to 44 0 to 2 High High 84

NOTES :

1. Measure surface temperature of heat exchanger pipe around center of heat exchaner path U bent.

(Thermistor themometer)

2. Connecting piping condition 7.5 m

– 22 −

8-1. Indoor Unit

RAS-18SKV-E, RAS-22SKV-E

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 220-230V ~60Hz

50Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN

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

SLEEP (1,3,5,9 OFF TIMER)

– 23 –

RAS-18SKVR-E, RAS-22SKVR-E

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

Air purifier

unit

Micro Switch

From Outdoor Unit

220-240V 220-230V ~60Hz

50Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN

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

SLEEP (1,3,5,9H OFF TIMER)

PURE (Air purifier)

– 24 –

8-2. Outdoor Unit (Inverter Assembly)

detect

Current

circuit

Gate drive

detect

Current

Outdoor

Fan motor

Inverter

(DC → AC)

Compressor

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

220− 230 V ~60Hz

For INDOOR UNIT

Discharge

temp. sensor

Outdoor air

temp. sensor

Suction temp.

– 25 –

sensor

temp.sensor

Heat exchanger

9. OPERATION DESCRIPTION

9-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air conditioner, which uses 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 120 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 followed 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.

– 26 –

9-2. Operation Description

1. Basic operation ........................................................................................................... 28

1. Operation control ................................................................................................... 28

2. Cooling/Heating operation ..................................................................................... 29

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

4. DRY operation........................................................................................................ 29

2. Indoor fan motor control ............................................................................................. 30

3. Outdoor fan motor control........................................................................................... 32

4. Capacity control .......................................................................................................... 33

5. Current release control ............................................................................................... 33

6. Release protective control by temperature of indoor heat exchanger........................ 34

7. Defrost control (Only in heating operation) ................................................................ 35

8. Louver control ............................................................................................................. 36

1) Louver position....................................................................................................... 36

2) Air direction adjustment ......................................................................................... 36

3) Swing ..................................................................................................................... 36

9. ECO operation ............................................................................................................ 37

10. Temporary operation................................................................................................... 38

11. Air purifying control [Detection of abnormality] .......................................................... 38

12. Pulse Modulating valve (P.M.V.) control ..................................................................... 40

13. Self-Cleaning function ................................................................................................ 41

14. Remote-A or B selection ............................................................................................ 42

15. QUIET mode ............................................................................................................. 43

16. COMFORT SLEEP mode ......................................................................................... 43

17. Short Timer ................................................................................................................ 43

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

19. Hi-POWER Mode ...................................................................................................... 44

20. FIL

TER Indicator ...............................................................................................44

9-3. Auto Restart Function ................................................................................................45

9-3-1. How to Set the A uto Restart Function .............................. ........................................ 45

9-3-2. How to Cancel the Au to Restar t Function ................................................................ .46

9-3-3. Power Failure During Timer Operation ................................................................... .46

9-4. Remote Controller and Its Fuctions ...................................................................... 47

9-4-1. Parts Name of Remote Contr oller ............................................................................... 47

9-4-2. Operation of remote control ....................................................................................... 47

9-4-3. Name and Functions of Indications on Remote Contr oller .........................................50

– 27 −

Item

Operation flow and applicable data, etc.

Description

1. Basic operation

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

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.)

– 28 –

Item

Operation flow and applicable data, etc.

Description

1. Basic operation

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

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

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

[ ]

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.

4. DRY operation

DRY operation is performed 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]

1.0

0.5

L– (W5)

(W5+W3) / 2

SUL (W3)

Tsc

Fan speed

− 29 −

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.

Item

Operation flow and applicable data, etc.

Description

2. Indoor fan motor control

COOL ON

Fan speed setup

AUTO

[ C]

+2.5

+2.0

+1.5

+1.0

(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+

M+

Fan speed

(L + M) / 2

(M + H) / 2

(Fig. 2)

Air volume AUTO

M+(WB)

*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

* 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

L(W6)

(Linear approximation from M+ and L)

(Table 1) Indoor fan air flow rate

Fan speed

level

COOL

HEAT

DRY

WF UH 1100 991 972 1200 1101 1200 1080 WE H 1100 991 972 1200 1101 1200 1080 WD M+ 1090 980 962 1200 1101 1200 1080 WC H 1070 957 940 1180 1079 1180 1059 WB M+ 980 858 843 1080 968 1080 951 WA 940 813 799 1020 902 1020 886

W9 M L+ 890 758 745 980 858 980 843

W8 L 780 636 626 850 713 850 702

W7 L+ L- L+ 750 603 594 810 669 810 659

W6 L L 740 591 583 800 658 800 648

W5 L- UL L- 700 547 540 760 614 760 605

W4 UL UL 700 547 540 700 547 700 540

W3 SUL SUL 650 492 486 650 492 650 485

W2 SUL 500 325 324 500 325 500 324

W1 500 325 324 500 325 500 324

RAS-18SKV-E

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

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

RAS-18SKVR-E RAS-22SKV-E RAS-22SKVR-E

1100 1100 1090 1070 980 940

890 780 750 740 700 700 650 500 500

– 30 –

Item

Operation flow and applicable data, etc.

Description

2. Indoor fan motor control

HEAT ON

Fan speed setup

AUTO

TC ≥ 42 C

MANUAL

Indication Fan speed

L+

M+

YES

52 51

(Fig. 3)

(L + M) / 2

(M + H) / 2

Min air flow rate control

Limited to Min WD tap

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.

42 41

* Fan speed =

(Fig. 4)

Basic fan control

[ C]

TSC

–0.5

–1.0

–1.5

–2.0

–2.5

–5.0

–5.5

*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+)

(TC – – W8) + W8

Fan speed

AUTO

L+ (W9)

M+ (WD)

H (WE)

(Fig. 5)

No limit

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 stability. * A: When Tsc ≥ 24, A is 24, and when Tsc < 24, A is Tsc

Tsc: Set value

Fan speed MAN Fan speed AUTO in stability Fan speed AUTO in starting

H (WE)

Line-approximate H and S

UL with Tc.

SUL (W2)

Stop

UAL in starting

(Fig. 6)

[In starting and in stability]

• Until 12 minutes passed after operation start

FAN AUTO

FAN Manual

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

• Room temp. < Set temp. –4°C

In starting

In stability

• When 12 to 25 minutes passed after operation start 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

– 31 –

Item

Operation flow and applicable data, etc.

Description

3. Outdoor fan motor control

1) Outdoor unit operation command (Outdoor fan control)

when the motor stopped.

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

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

4) Motor operates as shown in the table below.

In cooling operation

Compressor speed

During

ECO and

QUIET

and

comfort

sleep

To is abnormal

Outdoor fan speed (rpm)

Tap

f 0

f 1

f 2

f 3

f 4

f 5

f 6

f 7

(rps)

To≥38

≥

To 28 To 15

≥ ≥

To 5

≥

To 0.5 To 0.5

≥

To 38

≥ ≥

To 28 To 15

≥

To 5

≥

To 0.5

≥ ≥

To 0.5

18SAV-E 22SAV-E Tap 18SAV-E 22SAV-E

0 0 f 8 560 560

230 230 f 9 640 640

300 300 f A 670 670

350 350 f B 700 750

410 410 f C 800 840

480 480 f D 800 840

500 500 f E 800 920

530 530 f F 800 920

YES

Air conditioner

OFF

MIN MAX MIN MAX MIN MAX

< 50.3< 22.1

f6 f9 f8 fB fA fE f5 f9 f7 fB f9 fE f3 f7 f5 f9 f7 fB f1 f3 f1 f7 f3 f9 f1 f3 f1 f5 f3 f7 f0 f1 f0 f3 f1 f4 f6 f9 f8 fB fA fB f5 f9 f7 fB f9 fB f3 f7 f5 f9 f7 fB f1 f3 f1 f7 f3 f9 f1 f3 f1 f5 f3 f7 f0 f1 f0 f3 f1 f4 f1 fF f1 fF f1 fF

50.3 ≤

Alarm

display

In Heating operation

Compressor speed (rps)

To 10°C

≥

To 25°C

During

ECO mode

When To is abnormal

≥

To 5.5°C

≥

To 5.5°C

≥ ≥

To 10°C

≥

To 5°C

≥

To 5.5°C

≥

To 5.5°C

< 30.5 < 55.1 55.1 ≤

f6 f8 f9

f8 fA fC fA fB fD fA fB fD

f5 f7 f9

f7 f9 fB

f9 fA fB

f9 fA fB fD fD fD

– 32 –

Item

Operation flow and applicable data, etc.

Description

4. Capacity control

Remote controller Indoor unit

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)

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.

Outdoor temp. To

Setup of current release point

High

Cooling current release value

18SAV-E

Reduce compressor speed

Current decrease

Heating current release value

22SAV-E

18SAV-E

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 selected.

3) Whether the current value exceeds the specified value or not is judged.

4) If the current value exceeds the specified value, this function reduces the compressor speed and controls speed up to the closest one commanded from the indoor unit within the range which does not exceed the specified value.

22SAV-E

45°C 40°C 16°C 1 1°C

44°C 39°C

15.5°C

10.5°C

7.05A

6.07A

7.12A

9.30A

8.47A

10.50A

– 33 –

10.88A

8.77A

Item

Operation flow and applicable data, etc.

Description

6. Release protective control by temperature of indoor heat exchanger

7 C

6 C

5 C

Indoor heat exchanger temperature

(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

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-overpressure 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)

– 34 –

Item

Operation flow and applicable data, etc.

Description

7. Defrost control (Only in heating operation)

Start of heating operation

0’ 10’ 15’ 29’ 35’

–3°C

–7°C

–26°C

Outdoor heat exchanger temperature

A zone

B zone

C zone

(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 Te0 - 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 Te0 - TE ≥ 3 continued for 2 minutes in C zone,

defrost operation starts.

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.

– 35 –

Item

Operation flow and applicable data, etc.

Description

8. Louver control

1) Louver position

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

Cooling operation/

AUTO (COOL)

Initial setting of "Cooling storage position"

Louver : Horizontal blowing (37.4°)

2) Louver position in heating operation

Heating operation/

AUTO (HEAT)

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.

Initial setting of “Heating storage position” Louver : Directs downward (76.9° )

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.

– 36 –

Item

Operation flow and applicable data, etc.

Description

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

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.

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

Frequency

Time

Zone

10 9 8 7 6

4 3

Dry Max

*12 *11

Min Hz

OFF

1H 2H

*10 *

FAN

Fan speed depend on presetting and can change every speed.

every speed after setting ECO

operation.

3) The compressor speed is

controlled as shown in the left figure.

0 –0.5 –1.0 –1.5 –2.0 –2.5 –3.0 –4.0 –5.0

− 5.5

(Room temp. – Set temp.)

* 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

Cool min

DRY max

30 minutes

18SKV-E,18SKVR-E 22SKV-E,22SKVR-E

10 49

→ Time Compressor

speed

0Hz

A zone

aHz

B zone

a to 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.

–11.0

− 11.5

a c

18SKV-E 18SKVR-E

– 37 –

10 68

C zone

cHz

22SKV-E 22SKVR-E

10 72

Item

Operation flow and applicable data, etc.

Description

10. Temporary operation

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.

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.

11. Air purifying control

RAS-18SKVR-E

22SKVR-E

only

Present status

Stop

Air purifier only

Air conditioner

Joint use of AC and air purifier

Air purifying operation

AC + Air purifying operation

This function generates nagative ion while cleaning the air in the room. If air purifier-ON signal is received while the air conditioner stops, the air purifier starts operation,

and if it is received while the air conditioner operates, the air conditioner and the air purifier start operation. The air ion generator operates linked with the air purifying operation.

Follows to AC operation

YES

PURE button Air conditioner

Air purifier AC operation*

Stop (All) AC + Air purifier

AC + Air purifier All stop

AC operation All stop

Louver*1

Cooling position

Press RESET button.

Temporary [AUTO] operation

Temporary [COOL] Operation

Operation button

Fan speed *2

AUTO, L, L+, M, M+, H

Follows to AC operation

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.

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.

* When the previous operation was the

operation of air conditioner + air purifier, an operation of air conditioner + air purifier starts by pushing AC button on the remote controller. (Operation of air conditioner + air purifier is stored in memory.)

*1 Swing is available

*2 Fan speed is Fan Auto mode varies in

order, (M + 1) → (L) → (L–) → (SL).

Sending air purifier-ON

1 2

Operation lamp ON

Memory position

of louver/COOL

Fan ON

Air purifier ON

Air purifying operation

1,2

Air conditioner operatesAir conditioner stops

Start of air purifier-ON

Air conditioner +

air purifier operate

Sending air purifier-OFF

3 4

Air purifier operates Air conditioner +

Air purifier operate

Operation lamp OFF Filter-OFF

Fan stop

Air conditioner operates

Air purifier-OFF

Louver close

All stop

– 38 –

Item

Operation flow and applicable data, etc.

Description

11. Air purifying control [Detection of abnormality]

Air purifying operation

PURE lamp ON

Air purifier power ON

YES

Filter lamp (1Hz) ON

Air purifier power OFF

power estimates

Error input is detected

Air purifier power OFF

was detected by

5 times or more

Filter lamp (1Hz) ON

Reset by RESET button.



Reset by RESET button or by the stop direction



from the remote controller. * When the breaker is turned [ON] or RESET

Air purifier

1000H

YES

Error input

YES

button is pushed while the FILTER indicator is turned on, the air purifier is not turned on until the integrated operation time of the indoor fan exceeds 1 hour after operation start. It is the safety measures considering an incomplete drain when electric dust collector has been cleaned with water.

∗

Approx. 10 minutes

passed from the error input

was detected.

YES

1. Purpose

The air purifying control function is to alert the user to trouble in the ionizing or air purifying operation.

2. Description

Trouble is determined to have occurred (indicated by the FILTER indicator) in the following four cases.

1) When a count of 1000H has been

reached on the timer

2) When the panel switch has been set to

OFF by the opening of the air inlet grile, etc.

3) When an abnormal discharge caused

by a symptom such as the build-up of dirt has been detected while the air purifier is ON

4) When the electric dust collector has

not been installed correctly * Trouble case (2) or (3) is deemed to

have occurred when the action concerned continues for more than one second.

3. Operation

The sequence that FILTER indicator is turned on are described in the left flowchart.

1) When 1000H timer counts up, the

FILTER indicator keeps lighting even if the operation is stopped by the remote controller. The timer is stored in memory of the microcomputer, and the operation time is cleared by filter RESET button on the indoor unit. (FILTER indicator goes off.)

2) If the air purifying error input was

detected by 5 times or under, turn on the purifier again approx. 10 minutes after and judge it again. If the air purifying error input was detected by 5 times or more, determine the error and turn on the Filter lamp.

– 39 –

Item

Operation flow and applicable data, etc.

Description

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

control

SH control

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

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

– 40 –

Item

Operation flow and applicable data, etc.

Description

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

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).)

– 41 –

Item

Operation flow and applicable data, etc.

Description

13. Self-Cleaning

• Self-Cleaning diagram

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. (450RPM)

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

Turn off by remote controller or

timer-off function.

OFF OFF

Self-Cleaning mode

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

ON or OFF

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

Operation time

− 42 −

Item

Operation flow and applicable data, etc.

Description

15. QUIET mode

16. COMFORT SLEEP

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

speed L

again (cancel Quiet mode).

Cooling mode

• The preset temperature will increase as

• Press the [COMFORT SLEEP] button to

• If the [COMFORT SLEEP] button is pressed

• The preset temperature will drop down as

• Press the [COMFORT SLEEP] button to

• If the [COMFORT SLEEP] button is pressed

−

until the [QUIET] button is pressed once

show on ECO operation (Item No. 9)

choose the operating hours. Repeat

pressing to select the hours.

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

again means cancel comfort sleep mode.

Heating mode

show on ECO operation (Item No. 9)

choose the operating hours. Repeat pressing to setect thehours. (1hr, 3hr, 5hr or 9 hr)

again means cancel comfort sleep mode.

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. Short Timer

In the normal condition, after switching one circuit breaker, 3-minute delay time for compressor and 1 hour for plasma air purifier are set for the maintenance of the unit.

Purpose

To start the unit immediately for the purpose of testing, trial...etc, short timer can be used. maintenance of the unit.

Short Timer Setting

Press [ ] button to turn the unit OFF.

k Set the operation mode or plasma air

purifier on the remote control without

sending the signal to the unit.

l Use the tip of the pencil to push the

[CHK] button and hold, "00" will show

on display, them press [SET] button to make "00" disappear.

Press [ ] button to turn the unit ON.

n When short timer is activated, all

setting on the remote operates

immediately, besides, all indicatiors on

front panel turns ON continuously for

3 seconds.

− 43 −

Item

Operation flow and applicable data, etc.

Description

18. One-Touch Comfort

19. Hi-POWER Mode

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

Fan Operation

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.

([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.

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.

3 4

) Louver position is set as stored position

of the operating mode.

5) Fan is controlled as followings.

1. Automatic operation

• The indoor unit operates in according to the

current operation.

2. Cooling operation

• The preset temperature drops 1 degree

(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 2 degree

(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

20. FILTER When the elapsed time reaches 1000 hours after air Indicator

(18,22SKVR-E) only

purifier 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.

When you want a temporary operation while the FILTER lamp lights, press [RESET] button to turn off

the FILTER lamp. (See page 38)

− 44 −

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 event 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 for 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.

– 45 –

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.

– 46 –

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)

Plasma Air Purifier button (PURE) (RAS-18, 22SKVR-E Only)

Filter reset button (FILTER)

Clock Reset button (CLOCK)

Check button (CHK)

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 .

− 47 −

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. AIR PURIFYING OPERATION (RAS-18,22SKVR-E Only)

During air conditioner operation

Press PURE to start and air ionizer operation.

The plasma air purifier and air ionizer can be activated or deactivated during air conditioner is stopped and the air ionizer starts in conjunction with plasma air purifier operation.

Note: The FILTER indicator (orange) turns on after PURE operation is performed

for about 1000 hours.

6. 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.

7. 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.

8. TEMPORARY OPERATION

In case of the misplaced or discharged remote control

• 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.

9. TIMER OPERATION

Setting the ON Timer Setting the OFF Timer

Press ON : Set the desired ON timer.

Press

2 3

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.

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

SET

button during the ( or )

( or )

– 48 –

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.

10. 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.

. Press PRESET : Operate the preset operation.

11. 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)

12. QUIET OPERATION

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

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.

13. 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.

14. SLEEP TIMER OPERATION

To start the sleep timer (OFF timer) operation

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

− 49 −

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)

PURE indicator

Shows that the electrical air purifying operation is in progress.

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

: Cool, : Dry, : Heat)

: Dr y.

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.

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.)

mark is shown when holding down the

11 Comfort sleep

Indicates when comfort sleep is activaled. Press comfort sleep bu

tton to selectter

12 Quiet

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

13 One-Touch

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

14 Swing

Indicates when louver is swing. Press swing button to start the swing operation and press it again to stop the swing operation.

– 50 –

10. INSTALLATION PROCEDURE

10-1. Installation Diagram of Indoor and Outdoor Units

Pure Air Purifier

SKVR only

Filter

Batteries

Filter

(

Purifier

Pan head wood screw

filter

)

Remote control holder

Vinyl tape Apply after carrying out a drainage test.

Hook

50 mm or more

Shield pipe

Installation

plate

For the rear left and left piping

Wall

Insert the cushion between the indoor unit and wall, and tilt the indoor unit for

better operation.

Do not allow the drain hose to get slack.

Cut the piping hole sloped slightly.

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.

Wireless remote control

When installing the outdoor unit, leave open in at least two of direction (A), (B), (C) and (D) shown in the figure on the 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.

80mm or more only when unobstructed to the front and both sides.

(C)

(B)

(D)

C L

(A)

Saddle

Extension drain hose (Not available, provided by installer)

3 Batteries

Right

Rear right

Bottom right

Rear left

Left

Bottom left

Insulate the refrigerant pipes separately with insulation, not together.

8 mm thick heat resisting polyethylene foam

2 Wireless remote controller

– 51 –

10-2. Optional Parts, Accessories and Tools

10-2-1. Optional Installation Parts

Part Code

Parts name

Refrigerant piping

Indoor unit name Liquid side (Outer diameter) Gas side (Outer diameter)

RAS-18SKVR-E, 18SKV-E RAS-22SKVR-E, 22SKV-E

Shield pipe (for extension drain hose) (polyethylene foam, 6 mm thick)

Attachment bolt arrangement of outdoor unit

• Secure the outdoor unit with the attachment bolts and

nuts if the unit is likely to be exposed to a strong wind.

• Use Ø8 mm or Ø10 mm anchor bolts and nuts.

If it is necessary to drain the defrost water, attach drain nipple to the base plate of the outdoor unit before installing it.

6.35 mm 12.7 mm

108 mm

28 mm

320 mm

Air outlet

600 mm

86 mm

Q’ty

1 ea.

125 mm

Air inlet

102 mm

90 mm

Drain outlet

10-2-2. Accessory and Installation Parts

Part No.

Part name (Q’ty)

Part No.



Super Oxi Deo filter x 1



Installation plate × 1

Super Sterilizer filter x 1



ONE-

QUIET

SWIN

TIMER

SLEEP

CHK

FILTER

CLOCK



SET

Wireless remote control × 1



Battery × 2



Remote control holder × 1

This model is not equipped with an extension drain hose.

Parts marked with asterisk (*) are packaged with the outdoor unit.

PRES

TOUCH

FIX Hi-PO

PURE

TEMP

OFF

WER

COMF

MODE

FAN

SLEE

ECO

CLR

ORT

Plasma pure filter × 1



Mounting screw ˘ 4 x 25 x 6



holder mounting screw

– 52 –

Part name (Q’ty)

(SKV series)

(SKVR series)

Remote control

˘3.1 × 16 × 2

Part No.

Part name (Q’ty)



Drain nipple* x 1



Water-proof rubber cap* x 2



Screw ˘ 4 x 10 x 2

Name

Owner's manual Installation manual Fulorirated gas installation manual*

WEEE instruction* EU instruction Product specification

Accessory sheet Energy label Refrigerant label* B/W strips

(Energy efficiency labels)

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 prevent 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.

– 53 –

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

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

lation Plate

Drilling a hole

When install the refrigerant pipes from the rear.

m from the right side edge is

center of pipe hole

23mm

35 120 180 240

Pipe hole

dia.65mm

The center of the pipe hole is above the arrow.

• 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.

(Side view)

Indoor unit

Reception range

(Top view)

Remote controller

Indoor unit

Reception range

Remote controller

Fig. 10-3-2

1. After determining the pipe hole position on the installation plate (

) 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

Pipe hole

Indoor unit

the center of pipe hole

Offset 85mm from the left side edge is

Hook

Anchor bolt holes

Hook

nit

Thread

Weight

Hook

Mounting Screw

Offset 23mm from the right side edge is

the center of pipe hole

2 m or more from ß oor

Pipe hole (dia. 65mm)

Installation plate

Fig. 10-3-3

Fig. 10-3-1

– 54 –

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.

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

1.5 mm2 H07RN-F or 60245IEC66.

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 following two ways.

1. Connection to fixed wiring: A switch or circuit breaker which discon-

nects 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 :

• Perform 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

NOTE :

• Install the installation plate using mounting screws

between 4 to 6, being sure to secure all four corners.

mounting screws.



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 you.

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 screws.

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.

– 55 –

CAUTION

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

Stripping length of the connecting cable

Terminal block

Earth line Connecting cable

110 mm

20 mm

10 mm

Earth line

80 mm

Cord clamp

Fig. 10-3-6

110

10 mm

Ear

th l

ine

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. 10-3-8

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.

How to remove the drain cap

Piping preparation

10 mm

50 m

Fig. 10-3-7

NOTE :

WIRE TYPE : more than 1.0mm2. (H07 RN-F or 60245 IEC 66).

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

Fig. 10-3-9

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.

Heat insulator

Drain hose

Fig. 10-3-10

– 56 –

How to attach the drain cap

In case of bottom right or bottom left piping

1. Insert hexagonal wrench (4 mm).

4 mm

Fig. 10-3-11

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.

• 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. 10-3-14

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. 10-3-12

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

12.7 mm, 15.88 mm

Bending radius

30 mm

0 mm

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

(To the front flare)

400 mm

300 mm

Liquid side

R30 or less (Ø6.35), R50 or less (Ø12. 7, Ø15. 88) 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. 10-3-13

Fig. 10-3-15

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.

– 57 –

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. 10-3-16

• 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 double-taping at the joint, moreover, 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

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. 10-3-19

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. 10-3-17

Push (unhook)

Drain hose

Inside the room

Extension drain hose

Fig. 10-3-20

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 power cord and other parts at a high place than the drain guide.

Wall

Drain guide

PushPush

Fig. 10-3-18

– 58 –

Space for pipes

Fig. 10-3-21

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

elevated 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.

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, perform 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 prevent 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

– 59 –

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 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 have 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.)

in the 2 elongated



10-4-3. Refrigerant Piping Connection

Flaring

1. Cut the pipe with a pipe cutter.

90˚

Obliquity Roughness Warp

Fig. 10-4-4

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

R410A

tool used

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 diagram 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.

Base plate

9 Drain nipple

Commercially available drain hose

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

12.70

0 to 0.5

1.0 to 1.5

Imperial (Wing nut type)

Outer dia. of

copper pipe

6.35

12.70

• Flaring size : B (Unit : mm)

R 410A

1.5 to 2.0

2.0 to 2.5

Die Pipe

Fig. 10-4-5

Fig. 10-4-6

Outer dia. of copper pipe

6.35

12.70

R 410A R 22

9.1

16.6

-0.4

9.0

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.

Fig. 10-4-3

– 60 –

Revised-2

Tightening Connection

Align the centers of the connecting pipes and tighten the flare nut as much as possible with your 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 excessive force.

Otherwise, the nut may break.

(Unit : N·m)

Outer dia. of copper pipe

∅6.35 mm

∅12.7 mm

Tightening tor que

14 to 18 (1.4 to 1.8 kgf·m) 50 to 62 (5.0 to 6.2 kgf·m)

Use a vacuum pump

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 (

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.

76 cmHg).

• 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

–101 kPa

(–76 cmHg)

Handle Lo

Charge hose (For R410A only)

Connecting pipe

Packed valve at gas side

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-ß ow prevention (For R410A only)

Vacuum

pump

Fig. 10-4-9

CAUTION

• IMPORTANT POINTS FOR PIPING WORK

1. Keep dust and moisture from entering the pipes.

2. Tighten connections carefully (between pipes and unit).

3. Evacuate the air in the connecting pipes using a VACUUM PUMP.

4. Check for gas leaks at all connections.

– 61 –

Packed Valve handling precautions

Revised

• 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 table:

Gas side (Ø12.7 mm)

Liquid side (Ø6.35 mm)

Service port

50 to 62 N•m (5.0 to 6.2 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

1012

Earth line Earth line

Connecting cable

Power cord

Fig. 10-4-12

Model RAS-

Power source

Maximum running current

Installation fuse rating

Power cord

Connection cable

18SKVR-E

18SK

V-E

220 − 230 V ~ 60 Hz

220 – 240 V ~50 Hz

12.0 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)

SKVR-E

22SK

13.5 A

V-E

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

– 62 –

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.

Check places for the indoor unit.

Valve cover

Electric parts cover

Check places for the 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.)

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 power 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 Manual.

“B” Display “00” Display

PRESET

ONE-TOUCH

QUIET

SWING

TIMER

SLEEP

CHK

PURE

FIX Hi-POWER ECO

ON OFF

●

FILTER ● CLOCK

FAN

MODE

COMFORT

SELECT

●

Fig. 10-5-3

CLR

SET

– 63 –

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. (Refer to the check points in servicing written on the wiring diagrams attached to the indoor/outdoor units.)

Table 11-1

No.

Troubleshooting Procedure

First Confirmation

Primary Judgment

Judgment by Flashing LED of Indoor Unit

Self-Diagnosis by Remote Controller

Judgment of Trouble by Every Symptom

Page

68~70

No.

Troubleshooting Procedure

Check Code 18 and 1E

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 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.

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.

Page

Shared potential

MCU

Driver

Amplifier

Fig. 11-1

Amplifier

IGBT × 6

FET × 6

Compressor

Fan motor

– 64 –

CAUTION

Sensor leads

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 par ts 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 power 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 inv erter 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

18SAV-E : 500µF /400V, 22SAV-E : 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)

Fig. 11-3

– 65 –

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 FAN (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 [START/STOP] 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.

– 66 –

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 troubles.

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 block of item B.

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

– 67 –

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

1. If the lamps are indicated as shown B to E in Table 11-3-1, execute 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 condition 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

PU R E

FI X Hi -PO WE R E CO

FI LT E R

S LE E P

OF F

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 [START/STOP] 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

– 68 –

11-4-2. Caution at Servicing

1. After servicing, press the START/STOP 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 e ven 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 board 2 and 3, replace inverter P.C. board. If signal stops between indoor terminal board 2 and 3, replace indoor P.C. board.

– 69 –

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.),

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.)

Air

conditioner

status

All off

Operation continues

All off

Operation continues

All off

Operation continues

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.

——

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 wir ing 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.

– 70 –

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-18, 22 Series )

Operation

Check Item

Considerable principle cause

indicated on rear of

Is DC310–340V

supplied between

CN31 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

[START/STOP] button

on remote controller?

YES YES

Unit operates normally.

YES YES

Parts (R04, R05, DB01, C01,

C03, IC01 and T01) 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 CN31 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”.

– 71 −

(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-18, 22 Series )

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 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

1 + and 3 – of motor

connector (CN31).

YES

(Motor connection condition)

Is it possible to detect DC 15V

between

motor connector (CN31).

+ and 3 – of

YES

Start to operate the

indoor unit in except

heating operation.

At this time, is it possible to

detect DC 1V or more between

5 + 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

– 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

Peplace indoor fan motor.

Peplace main P.C. board.

Peplace 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

(CN31).

YES

– 72 –

(4) Indoor fan motor automatically starts to rotate by turning on power supply

(For DC fan motor in RAS-18,22SKV-E, RAS-18,22SKVR-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.

P.C. board

(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

CN31

6 (Blue) 5 (Yellow) 4 (White) 3 (Black) 2 – 1 (Red)

– 73 –

(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 receiver

on indoor unit

exposed to

direct sunlight?

YES

Is there any

thyristor

fluorescent light

nearby?

YES

Push the START/STOP button.

Is transmission mark indicated?

YES

Does indoor unit

operate when moving

remote controller

near receiver or

indoor unit?

YES

Batteries are

exhausted.

The unit does not beep at all. Operation lamp on indoor unit is not indicated.

Push RESET button on remote controller with tip of pencil.

Avoid direct sunlight.

Keep indoor unit away from thyristor fluorescent light.

Does indoor unit

start to operate by

automatic restart

function?

YES

Does radio sound

is affected by remote

controller when a signal is

transmitted at distance of

5 cm from radio?

YES

P.C. board is defective.

Replace P.C. board.

Replace batteries.

Push the START/ STOP button

Is transmission

mark indicated?

YES

Does indoor unit

beep and operate?

YES

Normal

operation

Remote controller

is defective.

Replace remote controller.

NOTE : After replacing batteries,

push the RESET button with a tip of a pencil.

– 74 –

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 (11-8-1.)

Abnormal time : Voltage does not vary.

(2) Outdoor unit stops in a little while after operation started <Check procedure> Select phenomena described below.

1) 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.

2) 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.

– 75 –

11-6. Check Code 18 and 1E

18 1E

Gas leakage, disconnection of TS/TE sensors (Check code 02, 1C)

Valve drive check

Discharge temp. error, gas leakage (Check code 03, 1E)

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

– 76 –

Replace valve.

Add gas.

11-7. Troubleshooting

11-7-1. How to Check Whether the Air Purifier is Good or Not (18, 22SKVR-E only)

Turn off the power breaker once, and turn on again after 10 seconds.

Does the OPERATION indicator flash?

YES

Turn off the power breaker and remove CN41 (Micro switch connector). Short-circuit between and pin of CN41 at PC side, and turn on the power breaker after 10 seconds.

Is DC12V applied between (Red/DC12V) and (Brown/GND) of CN1 of the

Primary checkOperation check

micro-switch connector under

OFF status of the micro-switch

micro-switch connector under ON status of the micro-switch

1) Check operation while short-circuiting CN41 of the main P.C. board.

2) Perform air purifying operation by the remote controller.

• In this time, check that the remote controller is in status which is shortened by time on the reactivation preventive timer and all display indicators go on for approx. 3 seconds when a signal is received. If time on the reactivation preventive timer is not shortened, the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.

• While the air purifier operates, check that the fan speed [AUTO] is not displayed. (Because the power ON/OFF is controlled on the program)

3) Be sure not to touch the electric dust collector, ionizer, or ionized wire unit with the human body.

Does the PURE indicator (Blue) or

the FILTER indicator (Orange) go on?

it was ON, and does the FILTER

Refer to items, cleaning and check for the electric dust collector/ionizer/ ionized wire units. When the ionized wire is disconnected or when dirt is

( )

not cleaned even cleaned, replace each unit.

1 1 2

high-voltage generator?

Is there conduction of

(Front panel opened)?

Is there conduction of

(Front panel closed)?

( )

Does the indoor fan rotate?

Does the PURE indicator

go off within 2 seconds after

indicator (Orange) go on?

Are the electric dust

collector and ionizer dried?

(Electrode check)

1 2

YES

NO NO

YES

Dry the electric

dust collector and ionizer.

Referring to the right figure, check the high-output voltage of the air filter unit. (NOTE) Use an exclusive high voltage tester; otherwise the tester may be broken.

YES

Is DC12V applied

between (+) and (–)

of CN42 of the main

P.C. board ? YES

Micro-switch is stuck

Micro-switch malfunction

Is DC-5V to DC-10V

applied between

(Brown/Negative voltage)

and (Brown/GND)

of CN42 of the main

P.C. board?

YES

Is output of the ionizer approx. 4.0 kV to 4.8 kV? Is output of the collector approx. 3.0 kV to 3.8 kV?

YES

Are the electric dust

collector/ionizer/ionized

wire units dirty?

Is an abnormal sound

(cracking noise) heard

from the electrode?

To item “Power supply is not turned on”

Replace the main P.C. board.

Replace micro-switch.

• Conduction check of micro-switch

Push the switch

→ ON Release the switch → OFF

Tester

To item “Only indoor fan does not operate”

Replace the main P.C. board.

• How to check output of the air purifier

Be sure not to come to contact to the gray part or not to touch the ionized cables.

High-voltage tester

Replace the high-voltage generator.

No trouble

GND

Collector output

Ionizer output

– 77 –

11-7-2. How to Check Whether the Minus Ion Generator is Good or Not (18, 22SKVR-E only)

Turn off the power breaker once, and turn on again after 10 seconds.

Does the OPERATION indicator flash?

YES

Turn off the power breaker and remove CN41 (Micro switch connector). Short-circuit between and pin of CN41 at PC side, and turn on the power breaker after 10 seconds.

Is DC12V applied

between (Red/DC12V) and (Brown/GND) of CN1 of the

Primary checkOperation check

micro-switch connector under

OFF status of the micro-switch

micro-switch connector under ON status of the micro-switch

1) Check operation while short-circuiting CN41 of the main P.C. board.

2) Perform air purifying operation by the remote controller.

• While the air purifier operates, check that the fan speed [AUTO] is not displayed. (Because the power ON/OFF is controlled on the program)

3) Be sure not to touch the electrode with the human body.

high-voltage generator

in the air purifier?

Is there conduction of

(Front panel opened)?

Is there conduction of

(Front panel closed)?

( )

YES

Micro-switch is stuck

Micro-switch malfunction

To item “Power supply is not turned on”

Replace the power P.C. board

or the housing assembly.

Replace micro-switch.

• Conduction check of micro-switch

Push the switch → ON

Release the switch → OFF

Tester

Does the indoor fan rotate?

YES

Does the PURE indicator (Blue) or

the FILTER indicator (Orange) go on?

YES

Does the PURE indicator

go off within 2 seconds after

it was ON, and does the FILTER

indicator (Orange) go on?

Referring to the right figure, check the high-voltage output of the air ionizer. In this time, peel the thermal insulator, and attach it to the original position after check operation.

NOTE : Use an exclusive high voltage tester; otherwise the tester may be broken.

Does the electrode

output approx. –6kV?

Replace the

high-voltage generator

YES

No trouble

To item “Only indoor fan does not operate”

Replace the main P.C. board.

To item “How to check whether

the air purifier is good or not”

• How to check output of minus ion <Caution on High Voltage!!>

High

Electrode

GND

‑

Voltage

unit

– 78 –

High Voltage tester

11-8. How to Diagnose Trouble in Outdoor Unit

11-8-1. Summarized Inner Diagnosis of Inverter Assembly

Table 11-8-1

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:400V x 3 760

F:400V 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.

– 79 –

Diagnosis/Process flowchart Item

Contents

Summary

Check

compressor

winding

resistance.

Replace

control board.

Replace control board assembly.

Replace

compressor.

Check

Operation

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.

→ OK if 10MΩ or more



→ OK if 0.51Ω → 0.57Ω



(Check by a digital tester.)



11-9. How to Check Simply the Main Parts

11-9-1. 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 .

– 80 –

(3) Check procedures

RAS-18, 22 Series

Table 11-9-1

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 [START/STOP] button once to start the unit. (Do not set the mode to On-Timer operation.)

Shorten the restar t delay timer and start unit.

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 C10 and output side of IC08 (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, PURE(SKVR-E)), Preheat/Defrost

(SKV-E) are lit for 3 seconds and they

return to normal 3 seconds later.

Causes

Impulse voltage was applied or the indoor fan motor short-circuited.

1. The terminal 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

4. IC11, IC13 and T101 are defective.

5. IC11, IC13, IC14 and T101 are defective.

IC51 and IC52 are defective.

The indicators are defective or the housing assembly (CN21) is defective.

are defective.

Push [START/STOP] 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.)

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 com-

pressor operates.

2. Check whether or not the OPERATION indicator flashes.

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.

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.

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.

– 81 –

11-9-2. P.C. Board Layout

(RAS-18, 22 Series)

[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

– 82 –

TD : Discharge temp. sensor TA : Room temp. sensor TC : Heat exchanger temp. sensor TO : Outdoor temp. sensor TE : Outdoor heat exchanger temp. sensor TS : Suction temp. sensor

11-9-3. Indoor Unit (Other Parts)

No.

Room temp. (TA) sensor

Part name

Heat exchanger (TC) sensor

23Remote controller

Louver motor MP24Z3T

4 Indoor fan motor

11-9-4. Outdoor Unit

No.

Compressor (Model : DA130A1F-27

~ 18SAV-E

(Model : DA150A1F-20F)

~ 22SAV-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

Position

Resistance value

DA130A1F-27F DA150A1F-20F

Red - White

White Blac

White - Black

Black - Red

0.92 to 1.02Ω

0.88 to 0.98Ω

Under 20ºC

Outdoor fan motor (Model : ICF-140-43-4R)

4-way valve coil (Model : STF)

Pulse motor valve coil (Model : CAM-MD12TF)

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 Black

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

Position

Red - White Red - Orange Brown- Yellow

COM

YWBR BL

254

Brown- Blue

Resistance value

42 to 50Ω 42 to 50Ω 42 to 50Ω 42 to 50Ω

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 62 50 41 27 18

20.7 12.6 10.0 7.9 4.5 —

– 83 –

11-9-5. Checking Method for Each Part

No.

2 Diode block

Part name

Electrolytic capacitor (For boost, smoothing)

Checking procedure

1. Turn OFF the power supply breaker.

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 shown in continuity test by the tester.

C12 C13 C14

MCC-5009 Soldered

Heat sink IGBT side

C12, C13, C14 → 18SAV-E :500µF/400V, 22SAV-E : 760µF/400V

1. Turn OFF the power supply breaker.

2. Completely discharge the four electrolytic capacitors.

3. Remove the diode block from the PCB (which is soldered in place).

4. Use a multimeter with a pointer to test the continuity, and check that the diode block has the proper rectification characteristics.

12 3

–

surface

+ –

(DBO1)

Case that product is good

Pointer swings once, and returns slowly. When performing test once again under another polarity, the pointer should return.

Tester rod

+ –

–

10 to 20 Ω when the multimeter probe

is reversed

Resistance value

in good product

∞

– 84 –

11-10. 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 20 to 22Ω, 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.

– 85 –

12. HOW TO REPLACE THE MAIN PARTS

WARNING

• Since high voltages pass through the electrical parts, turn off the power without fail 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 may 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.

Remove the plasma air purifier. (for

model RAS-18, 22SKVR-E only)

Remarks

– 86 –

No.Part name

Procedures

Remarks

Front panel

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. (4 pcs.)

6) Take off four hooks of panel from rear side.

Installation plate

Front panel

Press

4 Screw

2 Screws

Three hooks

Four hooks

1) Press three center positions and two lower center positions of the air outlet, and then hang the hanging hooks (4 pcs.) at the top side of the front panel to the rear plate.

2) Insert the plasma air purifier (for model RAS-18,22SKVR-E). Press in the plasma air purifier until the protrusions on both sides are completely inserted into the holders. If installation is incomplete, the FILTER indicator (orange) may light.

Holder

Plasma air purifier

Protrusion

Holder

Protrusion

Plasma air purifier

3) Tighten four screws.

• Incomplete hanging or incomplete pressing may cause a dewdrops or generation

of a fluttering sound.

– 87 –

No.Part name

Procedures

Remarks

High voltage generator

(only in model RAS-18, 22 SKVR-E)

1) Follow to the procedure in the item .

To remove the air ionizer from the back body,

pull it toward you.

3) Disconnect the connectors of the high voltage generator.

4) Remove the fixing screws (2 pcs) and remove the high voltage generator from the evaporator.

2 Screws

Connector

Connectors

1) Insert the high voltage generator straight into the evaporator

voltage generator from the evaporator.

2) Secure it using the fixing screws. (2 pcs)

3) Connect the connectors of the high-voltage

generator

4) Attach the air ionizer to the back body.

Check whether it is

pleted inserted.

com

– 88–

No.Part name

Procedures

Remarks

Electric parts box assembly

1) Follow the procedure up to 3) in  above.

2) Remove screw of earth lead attached to the end plate of the evaporator.

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.

6) Remove the fixing screw that secures the electric parts box assembly, LED assembly

and remove the assembly.

TC sensorEarth Screw

Electric part box cover

Fan motor connector

Louver motor

connector

Fixing screw

1) Hook the top part of the electric parts box assembly onto the claws on the back body, and secure it using the fixing screw. 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.

LED assembly

– 89 –

No.

Part name

Procedures

Remarks

Horizontal louver



Evaporator



(Heat exchanger)

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 screws at the left side of the end plate of the heat exchanger.

2 Screws

4) Remove two fixing screw on the

heat exchage fixing holder to separate the heat exchage from the back body.

Screw

– 90 –

No.Part name

Procedures

Remarks

Bearing

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.

Two screws

Two

screws

Bearing

Bearing base

Bearing

– 91 –

No.Part name

Procedures

Remarks

Fan motor

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.

Set screw

Two screws on

motor cover

Two screws on

motor band

5) Pull the fan motor outward.

– 92 –

No.Part name

Procedures

Remarks

Cross flow fan

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 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.

5.0mm

• 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 fixing screw 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.

– 93 –

12-2. Microcomputer

No.



Part name

Common procedure

<P.C. board layout>

( RAS-18, 22 Series )

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.

R05 L01 C01 CN23 FUSE R04 R01 CN10

Remarks

Replace terminal block, microcomputer ass’y and the P.C. board ass’y.

DB01

C03

T01

IC03C20IC01

J04

– 94 –

12-3. Outdoor Unit

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 × 8L 1 pc.)

• After removing screw, remove the

valve cover pulling it downward.

3) Remove wiring cover (ST1TØ4 × 8L 2 pcs.), and then remove connecting cable.

4) Remove the upper cabinet. (ST1TØ4 × 8L 5 pcs.)

• After removing screws, remove the

upper cabinet pulling it upward.

Remarks

2. Attachment

1) Attach the water-proof cover.

NOTE

The water-proof cover must be attached without fail in order to prevent rain water, etc. from entering inside the indoor unit.

2) Attach the upper cabinet. (ST1TØ4 × 8L 5 pcs.)

3) Perform cabling of connecting cable, and attach the wiring cover.

• Place the wiring cover over the

opening used to work on the connecting wires of the side cabinet, and secure it using the two fixing screws (ST1TØ4 × 8L 2 pcs.). At this point, the top cushion of the wiring cover must be on the inside of the opening.

4) Attach the valve cover. (ST1TØ4 × 8L 1 pc.)

• 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.

– 95 –

No.Part name

Procedure

Remarks

Front cabinet

1. Detachment

1) Perform step 1 in .

2) Remove the fixing screws (ST1TØ4 × 8L 2 pcs.) used to secure the front cabinet and inverter cover, the screws (ST1TØ4 × 8L 3 pcs.) used to secure the front cabinet at the bottom, and the fixing screws (ST1TØ4 × 8L 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.the main unit, and attach it pushing upward.

Front cabinet

Claw

Square hole

Concave section

– 96 –

No.Part name

(

Procedure

Remarks

Inverter assembly

1) Perform work of item 1 in .

2) Remove screw (ST1TØ4 × 8L 2 pcs.) of the upper part of the front cabinet.

• If removing the inverter cover in this

condition, P.C. board can be checked.

• If there is no space above the unit, perform

work of 1 in .

Be careful to check the inverter because high-voltage circuit is incorporated in it.

3) Perform discharging by connecting

polarity by discharging resistance (approx. 100Ω40W) or plug of soldering iron to

terminals a of the C14 (printed “CAUTION HIGH VOLTAGE” is attached.) electrolytic capacitor (18SAV= 500µF,22SAV:760µF)

on P.C. board.

Be careful to discharge the capacitor because the electrolytic capacitor cannot naturally discharge and voltage remains according to trouble type in some cases.

Inverter cover

Discharging position (Discharging period 10 seconds or more)

A screw

STIT-4X8MSZN)

P. C. board (Soldered surface)

Plug of soldering iron

Terminal block

NOTE

This capacitor is one with mass capacity. Therefore, it is dangerous that a large spark generates if short-circuiting between , polarity with screwdriver, etc. for discharging.

4) Remove screw (ST1TØ4 × 8L 2 pcs.) fixing the main body and the inverter box.

5) Remove the front cabinet by performing step 1 in , and remove the fixing screws (ST1TØ4 × 8L) for securing the main body and inverter box.

6) Remove various lead wires from the holder at upper part of the inverter box.

7) Pull the inverter box upward.

8) Disconnect connectors of various lead wires.

Requirement

As each connector has a lock mechanism, avoid to remove the connector by holding the lead wire, but by holding the connector.

Put the compressor leads through the hole

The connector is one with lock, so remove it while pushing the part indicated by an arrow.

Put each leads

h the hole

throu

Be sure to remove the connector by holding the connector, not by pulling the lead wire.

– 97 –

No.Part name

Procedure

Remarks

Control board assembly

1. Disconnect the leads and connectors connected to the other parts from the control board assembly.

1) Leads

• 3 leads (black, white, orange) connected to terminal block.

• Lead connected to compressor : Disconnect the connector (3P).

• Lead connected to reactor : Disconnect the two connectors (2P).

2) Connectors (×7) CN300 : Outdoor fan motor (3P: white)*

(See NOTE) CN701 : 4-way valve (2P: yellow)* CN600 : TE sensor (2P: white)* CN700 : PMV (6P: white) CN603 : TS sensor (3P: white)* CN601 :TD sensor (3P: white)* CN602 : TO sensor (2P: white)

NOTE

These connectors have a disconnect prevention mechanism: as such, the lock on their housing must be released before they are disconnected.

CN603

CN601 CN600

CN700 CN602 CN300

CN701

CN300, CN701, CN700, CN600 and CN603 are connectors with locking mechanisms: as such, to disconnect them, they must be pressed in the direction of the arrow while pulling them out.

2. Remove the control board assembly from the P.C. board base. (Remove the heat sink and control board assembly while keeping them screwed together.)

NOTE

Disengage the four claws of the P.C. board base, hold the heat sink, and lift to remove it.

3. Remove the two fixing screws used to secure the heat sink and control board assembly.

4. Mount the new control board assembly.

NOTE

When mounting the new control board assembly, ensure that the P.C. board is inserted properly into the P.C. board support groove.

P.C. board

P.C. board base

– 98 –

Fan motor

Propeller fan

Flange nut

No.

Part name

Procedure

Remarks



Side cabinet

1. Side cabinet (right)

1) Perform step 1 in  and all the steps in .



2) Remove the fixing screw (ST1TØ4 × 8L

5 pcs.) used for securing the side cabinet to the bottom plate and valve fixing panel.

2. Side cabinet (left)

1) Perform step 1 in .

2) Remove the fixing screw (ST1TØ4 × 8L

1 pcs.) used to secure the side cabinet (left) onto the heat exchanger.

3) Remove the fixing screw (ST1TØ4 × 8L

2 pc.) used for securing the side cabinet to the bottom plate and heat exchanger.

Hook the claw onto the bottom plate here

The back body section is hooked onto the bottom plate here.



Fan motor

Detail A Detail B Detail C

1) Perform work of item 1 of  and .

2) Remove the flange nut fixing the fan motor and the propeller.

• Flange nut is loosened by turning clock-

wise. (To tighten the flange nut, turn counterclockwise.)

3) Remove the propeller fan.

4) Disconnect the connector for fan motor from the inverter.

5) Remove the fixing screws (2 pc.) holding by hands so that the fan motor does not fall.

* Precautions when assembling the fan

motor Tighten the flange nut using a tightening torque of 4.9 N•m.

– 99 –

Toshiba RAS-18SAV-E2 user guide manual

Specifications and Main Features

Frequently Asked Questions

User Manual