Toshiba RAS-10SAVR-E, RAS-16SKV-E, RAS-16SAVR-E, RAS-13SKV-E, RAS-10SKVR-E SERVICE MANUAL

SERVICE MANUAL

Indoor Unit Outdoor Unit

<High Wall, Heat Pump Type> <Heat Pump Type>

FILE NO. SVM-07036-1

SPLIT TYPE

RAS-13SKV-E RAS-13SAV-E
RAS-16SKV-E RAS-16SAV-E
RAS-10SKVR-E RAS-10SAVR-E

RAS-13SKVR-E RAS-13SAVR-E
RAS-16SKVR-E RAS-16SAVR-E

R410A

Revised March, 2007

CONTENTS

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

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

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

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

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

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

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

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

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

10. INSTALLATION PROCEDURE ................................................................ 56

11. HOW TO DIAGNOSE THE TROUBLE...................................................... 69

12. HOW TO REPLACE THE MAIN PARTS................................................... 92

13. EXPLODED VIEWS AND PARTS LIST ................................................. 110

– 2 –

Revised-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 bef ore 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 SER VICING 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 PAR TS 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.

– 3 –

• 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 RESUL T IN THE PIPE BURSTING AND POSSIBLE PER­SONNEL INJURIES.

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

WARNING

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

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

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

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

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

An insufficient circuit capacity or inappropriate installation may cause fire.

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

• Be sure to provide grounding.

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

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

Inappropriate grounding may cause electric shock.

CAUTION

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

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

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

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

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

For Reference:

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

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

– 4 –

Revised-1

2. SPECIFICATIONS

2-1. Specifications

Unit model Indoor RAS-10SKVR-E RAS-13SKV-E

Outdoor RAS-10SAVR-E RAS-13SAV-E
Cooling capacity (kW) 2.5 3.5
Cooling capacity range (kW) 1.1-3.1 1.1-4.0
Heating capacity (kW) 3.2 4.2
Heating capacity range (kW) 0.9-4.8 0.9-5.0
Power supply 1Ph/50Hz/220-240V
Electric Indoor Operation mode Cooling Heating Cooling Heating
characteristic Running current (A) 0.21-0.19 0.24-0.22 0.21-0.19 0.24-0.22

Power consumption (W) 35 40 35 40
Power factor (%)75757575

Outdoor Operation mode Cooling Heating Cooling Heating

Running current (A) 2.81-2.58 3.43-3.14 4.85-4.45 5.11-4.68
Power consumption (W) 563 710 1035 1090
Power factor (%)91949797

Starting current (A) 3.67-3.36 5.35-4.90
COP 4.18/4.27 3.27/3.72
Operating Indoor High (Cooling/Heating) (dB-A) 38/39 39/40
noise Medium (Cooling/Heating) (dB-A) 33/34 33/34

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

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

Indoor unit Unit model RAS-10SKVR-E RAS-13SKV-E

Dimension Height (mm) 275 275

Width (mm) 790 790

Depth (mm) 205 205

Net weight (kg) 9 9
Fan motor output (W) 20 20
Air flow rate (Cooling/Heating) (m3/min) 8.6/9.5 9.4/10.5

Outdoor unit Unit model RAS-10SAVR-E RAS-13SAV-E

Dimension Height (mm) 550 550

Width (mm) 780 780

Depth (mm) 290 290

Net weight (kg) 35 35
Compressor Motor output (W) 750 750

Type

Model DA89X1C-23FZ DA89X1C-23FZ

Fan motor output (W) 43

Air flow rate (Cooling/Heating) (m3/min) 30/30 35/35
Piping Type Flare connection Flare connection
connection Indoor unit Liquid side (mm) φ6.35 φ6.35

Gas side (mm) φ9.52 φ9.52

Outdoor unit Liquid side (mm) φ6.35 φ6.35

Gas side (mm) φ9.52 φ9.52
Maximum length (m) 20 20
Maximum chargeless length (m) 15 15
Maximum height difference (m) 10 10

Refrigerant Name of refrigerant R410A R410A

Weight (kg) 0.80 0.80

Wiring Power supply 3Wires:includes earth (Outdoor)
connection Interconnection 4Wires:includes earth
Usable temperature range Indoor (Cooling/Heating) (℃) 21-32/0-28 21-32/0-28

Outdoor (Cooling/Heating) (℃) -10-46/-15-24 -10-46/-15-24

Accessory Indoor unit Installation plate 1 1

Wireless remote controller 1 1

Batteries 2 2

Remote controller holder 1 1

Super Oxi Deo filter 1 1

Super Sterilizer filter - 1

Mounting screw 6 (φ4 x 25L) 6 (φ4 x 25L)

Remote controller holder

Pan head wood screw

Plasma air purifier 1 -

Installation manual 1 1

Owner's manual 1 1
Outdoor unit Drain nipple 1 1

Water proof rubber cap 2 2

Single rotary type with DC-inverter variablespeed control

2 (φ3.1 x 16L) 2 (φ3.1 x 16L)

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

– 5 –

Revised-1

Unit model Indoor RAS-13SKVR-E RAS-16SKV-E RAS-16SKVR-E

Cooling capacity (kW) 3.5 4.5 4.5
Cooling capacity range (kW) 0.8-4.1 0.8-5.0 0.8-5.0
Heating capacity (kW) 4.2 5.3 5.5
Heating capacity range (kW) 0.9-5.8 0.9-6.2 0.9-6.9
Power supply
Electric Indoor Operation mode Cooling Heating Cooling Heating Cooling Heating
characteristic Running current (A) 0.21-0.19 0.24-0.22 0.21-0.19 0.24-0.22 0.21-0.19 0.24-0.22

COP 3.50/3.89 2.82/3.42 3.23/3.62
Operating Indoor High (Cooling/Heating) (dB-A) 39/40 45/45 45/45
noise Medium (Cooling/Heating) (dB-A) 33/34 40/40 40/40

Indoor unit Unit model RAS-13SKVR-E RAS-16SKV-E RAS-16SKVR-E

Outdoor unit Unit model RAS-13SAVR-E RAS-16SAV-E RAS-16SAVR-E

Piping Type Flare connection Flare connection Flare connection
connection Indoor unit Liquid side (mm) φ6.35 φ6.35 φ6.35

Refrigerant Name of refrigerant R410A R410A R410A

Wiring Power supply 3Wires:includes earth (Outdoor)
connection Interconnection 4Wires:includes earth
Usable temperature range Indoor (Cooling/Heating) (℃) 21-32/0-28 21-32/0-28 21-32/0-28

Accessory Indoor unit Installation plate 1 1 1

Outdoor RAS-13SAVR-E RAS-16SAV-E RAS-16SAVR-E

Power consumption (W) 35 40 30 35 30 35

Outdoor Operation mode Cooling Heating Cooling Heating Cooling Heating

Outdoor (Cooling/Heating) (dB-A) 48/50 49/50 49/50

Dimension Height (mm) 275 275 275

Net weight (kg)999
Fan motor output (W) 20 30 30
Air flow rate (Cooling/Heating) (m3/min) 9.0/10.2 11.5/12.4 11.4/12.3

Dimension Height (mm) 550 550 550

Net weight (kg) 35 35 39
Compressor Motor output (W) 750 750 750

Fan motor output (W) 43
Air flow rate (Cooling/Heating) (m3/min) 37.5/37.5 35/35 36/32

Outdoor unit Liquid side (mm) φ6.35 φ6.35 φ6.35

Maximum length (m) 20 20 20
Maximum chargeless length (m) 15 15 15
Maximum height difference (m) 10 10 10

Weight (kg) 0.85 0.85 1.10

Outdoor unit Drain nipple 1 1 1

Power factor (%)757565656565

Running current (A) 4.57-4.19 5.17-4.74 7.19-6.59 6.94-6.37 6.26-5.74 6.81-6.24
Power consumption (W) 965 1080 1565 1515 1365 1485
Power factor (%)969699999999
Starting current (A) 5.17-4.74 7.40-6.78 7.05-6.46

Low (Cooling/Heating) (dB-A) 26/28 30/31 30/31

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

Width (mm) 780 780 780
Depth (mm) 290 290 290

Type
Model DA111A1F-20F1 DA111A1F-20F1 DA111A1F-20F1

Gas side (mm) φ9.52 φ12.7 φ12.7

Gas side (mm) φ9.52 φ12.7 φ12.7

Outdoor (Cooling/Heating) (℃) -10-46/-15-24 -10-46/-15-24 -10-46/-15-24

Wireless remote controller 1 1 1
Batteries 2 2 2
Remote controller holder 1 1 1
Super Oxi Deo filter 1 1 1
Super Sterilizer filter - 1 1
Mounting screw 6 (φ4 x 25L) 6 (φ4 x 25L) 6 (φ4 x 25L)
Remote controller holder
Pan head wood screw
Plasma air purifier 1 - 1
Installation manual 1 1 1
Owner's manual 1 1 1

Water proof rubber cap 2 2 2

2 (φ3.1 x 16L) 2 (φ3.1 x 16L) 2 (φ3.1 x 16L)

Twin rotary type with DC-inverter variablespeed control

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

– 5-1 –

2-2. Operation Characteristic Curve

Revised-1

<Cooling>

10

9

8

7

6

5

Current (A)

4

RAS-10SKVR-E

3

2

1

0

0 102030405060708090100110120

Compressor speed (rps)

RAS-13SKVR-E

RAS-16SKVR-E

RAS-16SKV-E

RAS-13SKV-E

<Heating>

10

9

8

7

6

5

Current (A)

4

3

2

1

0

0 102030405060708090100110120

RAS-16SKVR-E

RAS-16SKV-E

RAS-13SKVR-E

RAS-10SKVR-E

RAS-13SKV-E

Compressor speed (rps)

2-3. Capacity Variation Ratio According to Temperature

<Cooling>

105

100

95

90

85

80

RAS-16SKV-E

75

Capacity ratio (%)

70

65

60

55

Capacity ratio:100%=

2.5kW(RAS-10SKVR-E)

3.5KW(RAS-13SKV-E,
RAS-13SKVR-E)

4.5kW(RAS-16SKV-E,
RAS-16SKVR-E)

50

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

Outdoor temp. (℃)

RAS-10SKVR-E
RAS-13SKVR-E
RAS-16SKVR-E

RAS-13SKV-E

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

<Heating>

120

100

80

60

40

Heating Capacity ratio (%)

20

0

-15 -10 -5 0 5 10

RAS-10SKVR-E
RAS-13SKV-E
RAS-13SKVR-E
RAS-16SKV-E
RAS-16SKVR-E

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

Outdoor temp. (℃)

– 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 concentr ation
does not exceed the marginal le vel.

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

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

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

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

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

3-2. Refrigerant Piping Installation

3-2-1. Piping Materials and Joints Used

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

1. Copper Pipes

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

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

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

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

– 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

0.80 0.80

0.80 0.80

1.00 1.00

2. Joints

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

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

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

b) Socket Joints

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

Thicknesses of sock et joints are as shown in Tab le 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 “dimen-
sion A” by using a gauge for size adjustment.

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

Nominal

diameter

Outer

diameter

(mm)

Thickness

(mm)

Fig. 3-2-1 Flare pr ocessing dimensions

Flare tool for R410A

clutch type

ØD

A

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

0.8

0.8

1.0

0 to 0.5
0 to 0.5
0 to 0.5
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

0.8

0.8

1.0

Flare tool for R22

clutch type

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

1.0 to 1.5 1.5 to 2.0

1.0 to 1.5 1.5 to 2.0

1.0 to 1.5 2.0 to 2.5

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 1.0 to 1.5

0.5 to 1.0 1.5 to 2.0

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

0.8

0.8

1.0

Dimension (mm)

ABCD

9.1 9.2 6.5 13

13.2 13.5 9.7 20

16.6 16.0 12.9 23

19.7 19.0 16.0 25

– 9 –

Flare nut width

(mm)

17
22
26
29

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

0.8

0.8

1.0

1.0

B A

Dimension (mm)

ABCD

9.0 9.2 6.5 13

13.0 13.5 9.7 20

16.2 16.0 12.9 20

19.7 19.0 16.0 23

23.3 24.0 19.2 34

D

C

43˚ to 45˚

Flare nut width

(mm)

17
22
24
27
36

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

2. Flare Connecting Procedures and Precautions

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

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

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

NOTE :

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

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

Nominal

diameter

Outer diameter

(mm)

Tightening torque

N•m (kgf•cm)

Tightening torque of torque

wrenches available on the market

N•m (kgf•cm)

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

6.35

9.52

12.70

15.88

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

– 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 prev ent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing
dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are
lengthened.

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

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

2. Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)

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

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

Tools whose specifications are changed for R410A and their interchangeability

air-water heat pump installation

No.

1

2

3

4
5
6

7
8

9

10

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

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

Used tool

Flare tool
Copper pipe gauge for

adjusting projection
margin

Torque wrench
(For Ø12.7)

Gauge manifold
Charge hose
Vacuum pump adapter

Electronic balance for
refrigerant charging

Refrigerant cylinder
Leakage detector
Charging cylinder

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

Pipe flaring
Flaring by

conventional flare tool

Connection of flare nut

Evacuating, refrigerant
charge, run check, etc.

Vacuum evacuating
Refrigerant charge
Refrigerant charge

Gas leakage check
Refrigerant charge

Usage

Existence of
new equipment
for R410A

Yes

Yes

Yes

Yes

Yes
Yes
Yes

Yes

(Note 2)

R410A

Whether conven­tional equipment
can be used

*(Note 1)

*(Note 1)

×
×

×
×
×

×
×

Conventional air-water
heat pump installation

Whether new equipment
can be used with
conventional refrigerant

¡

*(Note 1)

×
×

¡

¡

×

¡

×

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the f ollowing 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 Monke y 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.

(Water heat
exchanger 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 allo y 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 o xide film removing
capability due to the addition of compounds
such as potassium fluoride, potassium chloride
and sodium fluoride to the borax-boric acid
compound.

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

3-5-3. Brazing

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

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

Never use gas other than Nitrogen gas.

1. Brazing method to prevent oxidation

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

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

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

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

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

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

7) Remove the flux completely after brazing.

Piping material

Copper - Copper

Copper - Iron

Iron - Iron

Used brazing filler

Phosphor copper

Silver
Silver

Used flux

Do not use

Paste flux

Vapor flux

1. Do not enter flux into the refrigeration cycle.

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

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

4. Remove the flux after brazing.

M

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

Revised-1

4. CONSTRUCTION VIEWS

RAS-10SKVR-E

RAS-13SKVR-E
RAS-16SKVR-E

Front panel

63

7

48

Knock out system

275

Air filter

116

Heat exchanger

Installation plate hanger

Air inlet

790

Plasma air purifier

Air ionizer

62 69

193480

Knock out system

49

205

48

63

7

Installation plate hanger

Connecting pipe (0.35m)

(For 10, 13 series; Flare

(For 16 series; Flare

84.5

Minimum

distance

to ceiling

275

170 or more

40

84.5 150 84.5

9.52mm)

12.7mm)

Hanger

621

235

215

Minimum

Hanger

distance

to ceiling

160.5 160.5 150

Center line

Drain hose (0.50m)

Connecting pipe (0.40m)

(Flare 6.35mm)

235

215

65 or more

Hanger

Installation plate outline

84.5

Minimum

distance

to ceiling

170 or more

157

56

Wireless remote controller

19

125

63

Remote controller holder

26

45

190

40

– 15 –

4-2. Indoor Unit

Revised-1

RAS-13SKV-E
RAS-16SKV-E

Front panel

63

7

48

Knock out system

275

Air filter

116

Heat exchanger

Installation plate hanger

Air inlet

790

62 69

193480

Knock out system

49

205

48

63

7

Installation plate hanger

Connecting pipe (0.35m)
(For 13 series; Flare
(For 16 series; Flare

84.5

Minimum

distance

to ceiling

275

170 or more

40

Hanger

84.5 150 84.5

9.52mm)

12.7mm)

Center line

621

235

215

Hanger

Minimum

distance
to ceiling

235

215

160.5 160.5 150

Drain hose (0.50m)

Connecting pipe (0.40m)

(Flare 6.35mm)

84.5

65 or more

Minimum

distance

to ceiling

170 or more

Hanger

Installation plate outline

56

Wireless remote controller

63

Remote controller holder

45

190

40

157

19

125

26

– 16 –

4-3. Outdoor Unit

30

Revised-1

A

108 125

600

320

50

36

306

R5.5

R

Ø

6 hole

15

A detail Drawing (Back leg)

290

86

320

FAN-GUARD

436

Ø

550

275

Ø

25 Drain outlet

2

-

Ø

11 x 14

(For 8 -

Ø

Hole

10 anchor bolt)

Ø

80

306

320

Ø

6 hole

11x14 hole

Ø

36
50

R

15

B Detail Drawing (Front leg)

COVER-PV

Z

9060090

69

320
342

100 or more

320

100 or more

Air outlel

Z View

600

Air intlel

600 or more

5

92

4

Service port

137

2 - R5-5 x 17L Ushape

(For ∅8 - ∅ 10 anchor bolt)

600 or more

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

Electrical part cover

Liquid side
(Flare 6.35)

Ø

Gas side
(10,13

: Flare ∅9.52)

(16

: Flare ∅12..7)

Installation dimension

– 17 –

5. WIRING DIAGRAM

5-1. RAS-13SKV-E / RAS-13SAV-E

RAS-10SKVR-E / RAS-10SAVR-E, RAS-13SKVR-E / RAS-13SAVR-E

Revised-1

– 18 –

5-2. RAS-16SKV-E / RAS-16SAV-E

RAS-16SKVR-E / RAS-16SAVR-E

– 19 –

6-1. Indoor Unit

6. SPECIFICATIONS OF ELECTRICAL PARTS

No.

Fan motor

1

(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

13SKV-E

10SKVR-E,13SKVR-E

16SKV-E, 16SKVR-E DC 340V, 30W

MMF-240-20-4B AC240/220V, 20W

AFS-220-20-4AR AC240V, 20W

ICF-340-30-2B

( − )

( − )

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 (6P) 30A, AC600V

Compressor 3-phases 4-poles 750W

8

9 COIL FOR P.M.V. DC12V

10 Coil for 4-way valve AC220-240V

11 Compressor thermo

10SAVR-E, 13SAV-E
13SAVR-E, 16SAV-E, 16SAVR-E

(Inverter attached)
(Inverter attached)
(Inverter attached)

DA89X1C-23FZ

DA111A1F-20F1

C12A-01-R

VHV

PW-2AL OFF : 125±4°C, ON : 90±5°C

62kΩ (20°C)

10kΩ (25°C)

10kΩ (25°C)

– 20 –

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-10SKVR-E / RAS-10SAVR-E

RAS-13SKV-E / RAS-13SAV-E

INDOOR UNIT

Indoor heat

exchanger

T1

Temp. measurement

TC

P

Pressure measurement
Gauge attaching port

Vacuum pump connecting port

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

4-way valve
(STF-0108Z)

TS

Muffler

Muffler

Compressor
DA89X1C-23FZ

Outdoor heat

exchanger

Cross flow fan

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

Sectional shape
of heat insulator

TD

TO

TA

Allowable height

difference : 10m

Strainer

Pulse Modulating
valve at liquid side
(SEV16RC9)

Strainer

Max. : 20m

Min. : 1m
Chargeless : 15m

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

Allowable pipe length

Temp. measurement

T2

TE

Propeller fan

OUTDOOR UNIT

NOTE :

Refrigerant amount : 0.80kg

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

NOTE :

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

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

– 21 –

RAS-13SKVR-E / RAS-13SAVR-E

RAS-16SKV-E / RAS-16SAV-E

INDOOR UNIT

Indoor heat

exchanger

T1

Temp. measurement

TC

P

Pressure measurement
Gauge attaching port

Vacuum pump connecting port
Deoxidized copper pipe

Outer dia. : 9.52mm (13)

Thickness : 0.8mm

: 12.7mm (16)

4-way valve
(STF-0108Z)

TS

Muffler

Muffler

Compressor
DA111A1F-20F1

Outdoor heat

exchanger

Cross flow fan

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

Sectional shape
of heat insulator

TD

TO

Split capillary

Ø1.2 x 80

TA

Allowable height

difference : 10m

Strainer

Pulse Modulating
valve at liquid side
(SEV16RC9)

Max. : 20m

Min. : 1m
Chargeless : 15m

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

Allowable pipe length

Temp. measurement

T2

Propeller fan

OUTDOOR UNIT

Ø1.2 x 80

TE

NOTE :

Refrigerant amount : 0.85kg

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

NOTE :

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

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

– 22 –

RAS-16SKVR-E / RAS-16SAVR-E

INDOOR UNIT

Indoor heat

exchanger

T1

Temp. measurement

TC

P

Pressure measurement
Gauge attaching port

Vacuum pump connecting port
Deoxidized copper pipe

Outer dia. : 12.7mm(16)

Thickness : 0.8mm

4-way valve
(STF-0108Z)

TS

Muffler

Muffler

Compressor
DA111A1F-20F1

Outdoor heat

exchanger

Cross flow fan

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

Sectional shape
of heat insulator

TD

TO

Split capillary

Ø1.2 x 80

TA

Allowable height

difference : 10m

Strainer

Pulse Modulating
valve at liquid side
(SEV16RC9)

Max. : 20m

Min. : 1m
Chargeless : 15m

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

Allowable pipe length

Temp. measurement

T2

Propeller fan

OUTDOOR UNIT

Ø1.2 x 80

TE

NOTE :

Refrigerant amount : 1.10kg

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

NOTE :

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

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

– 23 –

7-2. Operation Data

<Cooling>

Tempeature Heat exchanger

condition(°C)

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

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

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

13SKV-E 0.8 to 1.0 11 to 13 39 to 41 High High 77
13SKVR-E 0.8 to 1.0 11 to 13 46 to 48 High High 63
16SKV-E 0.7 to 0.9 10 to 12 47 to 49 High High 89
16SKVR-E 0.8 to 1.0 11 to 13 40 to 42 High High 83

pipe temp.

<Heating>

Tempeature Heat exchanger

condition(°C) pipe temp.

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

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

Model name Standard Indoor Outdoor Compressor

RAS- pressure fan mode fan mode revolution

13SKV-E 2.7 to 2.9 43 to 45 0 to 2 High High 80
13SKVR-E 2.6 to 2.8 41 to 43 0 to 2 High High 66
16SKV-E 2.5 to 2.7 39 to 41 0 to 2 High High 89
16SKVR-E 2.7 to 2.9 43 to 45 0 to 2 High High 83

NOTES :

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

2. Connecting piping condition : 5 m

– 24 –

8-1. Indoor Unit

RAS-13SKV-E

Revised-1

8. CONTROL BLOCK DIAGRAM

Heat Exchanger Sensor (Tc)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Converter

(D.C circuit)

Noise Filter

M.C.U.

Functions

• Cold draft preventing Function

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

• Clean Function

Serial Signal Transmitter/Receiver

Indoor Unit Control Unit

Louver

Motor

Louver Motor
Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

From Outdoor Unit

~

220-240V

50Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Infrared Rays, 36.7kHz

COMFORT SLEEP

QUIET

– 25 –

RAS-16SKV-E

Revised-1

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Converter

(D.C circuit)

Noise Filter

M.C.U.

Functions

• Cold draft preventing Function

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

• Clean Function

Serial Signal Transmitter/Receiver

Indoor Unit Control Unit

Louver

Motor

Louver Motor
Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

From Outdoor Unit

~

220-240V

50Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Infrared Rays, 36.7kHz

COMFORT SLEEP

QUIET

– 26 −

RAS-10SKVR-E, RAS-13SKVR-E

Revised-1

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

50Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation (START/STOP)
Operation Mode Selection

AUTO, COOL, DRY, HEAT

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Infrared Rays, 36.7kHz

COMFORT SLEEP

QUIET

– 27 –

RAS-16SKVR-E

Revised-1

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

50Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation (START/STOP)
Operation Mode Selection

AUTO, COOL, DRY, HEAT

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Infrared Rays, 36.7kHz

COMFORT SLEEP

QUIET

– 28 –

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.

For INDOOR UNIT

220–240 V ~50Hz

Discharge

temp. sensor

Outdoor air

temp. sensor

Suction temp.

– 29 –

sensor

temp.sensor

Heat exchanger