Toshiba RAS-13G2KCVP-T, RAS-10G2KCVP-T, RAS-18G2ACVP-T, RAS-18G2KCVP-T, RAS-10G2ACVP-T Service Manual

R410A

SERVICE MANUAL

SPLIT TYPE

Indoor Unit Outdoor Unit

Revised on Oct

,

2015

RAS-10G2KCVP-

T

RAS-13G2KCVP-

T

RAS-18G2KCVP-

T

RAS-10G2ACVP-

T

R

AS-13G2ACVP-

T

RAS-18G2ACVP-

T

FILE NO. SVM-15058-1

CONTENTS

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

2. SPECIFICATIONS ..................................................................................... 6

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

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

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

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

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

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

9. OPERATION DESCRIPTION................................................................... 25

10.

INSTALLATION PROCEDURE ................................................................ 59

11.

HOW TO DIAGNOSE THE TROUBLE ...................................................... 74

12.

HOW TO REPLACE THE MAIN PARTS.................................................... 99

13.

EXPLODED VIEWS AND PARTS LIST .................................................. 116

FILE NO. SVM-15058

- 2 -

1. SAFETY PRECAUTIONS

Installing, staring up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical
components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install, start-up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should be

performed by trained service personnel.

When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the
equipment.

Follow all safety codes, Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher near by
when brazing. Use care in handling, rigging, and setting bulky equipment.

Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit.
Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety information.
This is the safety-alert symbol

! . When you see this symbol on

the unit and in instructions or manuals, be alert to the
potential for personal injury. Understand these signal words : DANGER, WARNING, and CAUTION. These words are
used with the safety-alert symbol.

DANGER identifies the most serious hazards which will result in severs personal injury or death. WARNING signifies
hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result
in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in
enhanced installation, reliability, or operation.

• Before installation, please read these precautions for safety carefully.

• Be sure to follow the precautions provided here to avoid safety risks. The symbols and their meanings are shown below.

WARNING : It indicates that incorrect use of this unit may cause severe injury or death.
CAUTION : FAILURE TO FOLLOW THIS CAUTION may result in equipment damage or improper operation and

personal injury.

CAUTION

New refrigerant air conditioner installation

• THIS AIR CONDITIONER USES THE NEW HFC REFRIGERANT (R410A), WHICH DOES NOT DESTROY THE

OZONE LAYER.

R410A refrigerant is affected by inpurities such as water and oils because the pressure of R410A refrigerant is approx.

1.6 times of refrigerant R22.
ALSO NEW OILS ARE USED WITH R410A, THUS ALWAYS USE NEW REFRIGERANT PIPING AND DO NOT
ALLOW MOISTURE OR DUST TO ENTER THE SYSTEM.
To avoid mixing refrigerant and refrigerant machine oil, the sizes of charging port on the main unit is different than
those used on R22 machines and different tools will be required.

• EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe in the ground. If any section of pipe is buried, there must
be a 6 in. (152 mm) vertical rise to the valve connections on the outdoor units. If more than the recommended length
is buried, refrigerant may migrate to the cooter buried section during extended periods of system shutdown. This
causes refrigerant slugging and could possibly damage the compressor at start-up.

FILE NO. SVM-15058

- 3 -

DANGER

• FOR USE BY QUALIFIED PERSONS ONLY.

• 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.

• CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED WRONGLY,

ELECTRIC PARTS MAY BE DAMAGED.

• CHECK THE EARTH WIRE THAT IT IS NOT BROKEN OR DISCONNECTED BEFORE INSTALLATION.

• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS.

FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

• TO PREVENT OVERHEATION THE INDOOR UNIT AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY

(MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEATERS, FURNACE, STOVES, ETC.

• WHEN MOVING THE AIR CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY CAREFUL NOT

TO GET THE SPECIFIED REFRIGERANT (R410A) WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION
CYCLE. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION
CYCLE BECOMES ABNORMALLY HIGH AND IT RESULTINGLY CAUSES BURST OF THE PIPE AND INJURIES ON
PERSONS.

• IN THE EVENT THAT THE REFRIGERANT LEAK, DURING INSTALLATION WORK, IMMEDIATELY ALLOW FRESH AIR

INTO THE ROOM. IF THE REFRIGERANT GAS IS HEATED BY FIRE OR SOMETHING ELSE, IT CAUSE GENERATION
OF POISONOUS GAS.

WARNING

• ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.
Before installing, modifying, or servicing system, main electrical disconnect switch must be in the OFF position. There may
be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label.

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

• Installation work must be purformed by qualified personnel only.

• Specified tools and pipe parts for model R410A are required, and installation work must be done in accordance with the

manual. HFC type refrigerant R410A has 1.6 times more pressure than that of conventional refrigerant (R22). Use the
specified pipe parts, and ensure correct installation, otherwise damage and/or injury may be caused. At the same time,
water leakage, electrical shock, and fire may occur.

• Be sure to install the unit in a place which can sufficiently bear its weight. If the load bearing of the unit is not enough, or

installation of the unit is improper, the unit may fall and result in injury.

• Electrical work must be performed by trained, qualified installers and service mechanics in accordance with the code governing

such installation work, internal wiring regulations, and the manual. A dedicated circuit and the rated voltage must be used.

Insufficient power supply or improper installation may cause electrical shock or fire.

• Use a cabtyre cable to connect wires in the indoor/outdoor units. Midway connection is not allowed. Improper connection or

fixing may cause a fire.

• Wiring between the indoor unit and outdoor units must be well shaped so that the cover can be firmly placed. Improper

cover installation may cause increased heat, fire, or electrical shock at the terminal area.

• Be sure to use only approved accessories or the specified parts. Failure to do so may cause the unit to fall, water leakage,

fire or electrical shock.

• After the installation work. ensure that there is no leakage of refrigerant gas. If the refrigerant gas leaks out of the pipe into

the room and is heated by fire or something else from a fanheater, stove or gas range, it causes generation of poisonous gas.

• Make sure the equipment is properly grounded. Do not connect the ground wire to a gas pipe, water pipe, lightning

conductor, or telephone earth wire. Improper earth work may be the cause of electrical shock.

• Do not install the unit where flammable gas may leak. If there is any gas leakage or accumulation around the unit, it can

cause a fire.

• Do not select a location for installation where there may be excessive water or humidity, such as a bathroom. Deterioration

of insulation nay cause electrical shock or fire.

• Installation work must be performed following the instructions in this installation manual. Improper installation may cause

water leakage, electrical shock or fire. Check the following items before operating the unit.

- Be sure that the pipe connection is well placed and there are no leaks.

- Check that the service valve is open. If the service valve is closed, it may cause overpressure and result in compressor
damage. At the same time, if there is a leak in the connection part, it may cause air suction and overpressure, resulting
in damage to the unit or injury.

• In a pump-down operation, be sure to stop the compressor unit before removing the refrigerant pipe. If removing the

refrigerant pipe while the compressor is operating with the service valve opened, it may cause air suction and overpressure,
resulting in damage to the unit or injury.

• Do not modity the power cable, connect the cable midway, or use a multiple outlet extension cable. Doing so may cause

contact failure, insulation failure, or excess current, resulting in fire or electrical shock.

• If you detect any damage, do not install the unit. Contact your dealer immediately.

FILE NO. SVM-15058

- 4 -

CAUTION

CAUTION

• Exposure of unit to water or other moisture before installation could result in electric shock. Do not store it in a wet

basement or expose to rain or water.

• After unpacking the unit, examine it carefully for possible damage. Report any damages to your distributor.

• 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 and discharged air might disturb neighbors.

• Please read this installation manual carefully before installing the unit. It contains further important instructions

for proper installation.

• This appliance must be connected to the main power supply by means of a circuit breaker depending on the

place where the unit is installed. Failure to do so may cause electrical shock.

• Follow the instructions in this installation manual to arrange the drain pipe for proper drainage from the unit.

Ensure that drained water is discharged. Improper drainage can result is water leakage, causing water damage
to furniture.

• Tighten the flare nut with a torque wrench using the prescribed method. Do not apply excess torque. Otherwise,

the nut may crack after a long period of usage and it may cause the leakage of refrigerant.

• Wear gloves (heavy gloves such as cotton gloves) for installation work. Failure to do so may cause personal

injury when handling parts with sharp edges.

• Do not touch the air intake section or the aluminum fins of the outdoor unit. It may cause injury.

• Do not install the outdoor unit in a place which can be a nest for small animals. Small animals could enter and

contact internal electrical parts, causing a failure or fire.

• Request the user to keep the place around the unit tidy and clean.

• Make sure to conduct a trial operation after the installation work, and explain how to use and maintain the unit

to the customer in accordance with the manual. Ask the customer to keep the operation manual along with the
installation manual.

FILE NO. SVM-15058

- 5 -

2-1. Specifications

Unit model Indoor

RAS-10G2KCVP-T RAS-13G2KCVP-T RAS-18G2KCVP-T

Outdoor

RAS-10G2ACVP-T RAS-13G2ACVP-T RAS-18G2ACVP-T

Cooling capacity (kW)

2.6 3.8 5.1

Cooling capacity range (kW)

1.3-3.5 1.3-4.1

1.1-6.0

Power supply

1Ph/50Hz/220V

Electric
characteristic

Indoor Operation mode

Cooling Cooling Cooling

Running current (A)

0.24 0.24 0.24

Power consumption (W)

25 25 25

Power factor (%)

47 47 47

Outdoor Operation mode

Cooling Cooling Cooling

Running current (A)

2.96 4.77 7.12

Power consumption (W)

555 1035 1555

Power factor (%)

92 99

99

Starting current (A)

2.97 5.01 7.36

COP

4.48 3.58 3.23

Operating
noise

Indoor High (dB-A)

42

42

44

Medium (dB-A)

33 34 35

Low (dB-A)

24 25 26

Outdoor (dB-A)

49 50 52

Indoor unit Unit model

RAS-10G2KCVP-T RAS-13G2KCVP-T RAS-18G2KCVP-T

Dimension Height (mm)

293

Width (mm)

831

Depth (mm)

270

Net weight (kg)

14

Fan motor output (W)

30

30

Air fl ow rate (m3/min)

10.8 11.2 11.6

Outdoor unit Unit model

RAS-10G2ACVP-T RAS-13G2ACVP-T RAS-18G2ACVP-T

Dimension Height (mm)

550 550

Width (mm)

780 780

Depth (mm)

290 290

Net weight (kg)

37 36

Compressor Motor output (W)

1100

Type

750

Single rotary type with DC inverter variable

speed control

Twin rotary type with

DC inverter variable

speed control

Model

DA108X1C-23FZ DA131S1B-31FZ

Fan motor output (W)

43 43

Air fl ow rate (m3/min)

30 37.5

34.0

Piping
connection

Type

Flare connection Flare connection

Indoor unit Liquid side (mm)

Ø6.35 Ø6.35

Gas side (mm)

Ø9.52 Ø12.70

Outdoor unit Liquid side (mm)

Ø6.35 Ø6.35

Gas side (mm)

Ø9.52 Ø12.70

Maximum length (m)

20 20

(m)

15 15

Maximum chargeless length
Maximum height difference (m)

10 10

Refrigerant Name of refrigerant

R410A R410A

Weight (kg)

1.40

Wiring
connection

Power supply

1.1

3Wires:includes earth(Outdoor)

Interconnection

4Wires:includes earth

Usable temperature range

Indoor (°C)

21~32

Outdoor (°C)

-10~43

Accessory Indoor unit Installation plate

1

Wireless remote controller

1

Batteries

2

Remote controller holder

1
Mounting screw 6(Ø4x25L)
Remote controller holder

Pan head wood screw

2(Ø3.1x16L)

Installation manual

1
Owner’s manual

1

Outdoor unit Drain nipple

-

Water-proof rubber cap

-

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

2.

SPECIFICATIONS

FILE NO. SVM-15058

- 6 -

2-2. Operation Characteristic Curve

2-3. Capacity Variation Ratio According to Temperature

100

95

90

85

80

75

70

65

60

55

50

105

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

Outdoor Temp. (°C)

Capacity Ratio (%)

Conditions
Indoor: DB27°C/WB19°C
Indoor air flow: High
Pipe length: 7.5m

Capa

city r

atio: 100% =

2.6kW (RAS-10G2KCVP-T)

3.8kW (RAS-13G2KCVP-T)

5.1

kW (RAS-18G2KCVP-T)

RAS-10G2KCVP-T
RAS-13G2KCVP-T
RAS-18G2KCVP-T

0

1

2

3

4

5

6

7

8

9

10

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

FILE NO. SVM-15058

- 7 -

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.

FILE NO. SVM-15058

- 8 -

Table 3-2-1 Thicknesses of annealed copper pipes

Nominal diameter

1/4

3/8

1/2

5/8

Outer diameter (mm)

6.35

9.52

12.70

15.88

Thickness (mm)

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 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

FILE NO. SVM-15058

- 9 -

A

ØD

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.

Fig. 3-2-1 Flare processing dimensions

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

Nominal

diameter

1/4

3/8

1/2

5/8

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

0.8

0.8

1.0

A (mm)

Flare tool for R410A

clutch type

0 to 0.5

0 to 0.5

0 to 0.5

0 to 0.5

Conventional flare tool

Clutch type Wing nut type

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

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

Nominal

diameter

1/4

3/8

1/2

5/8

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

0.8

0.8

1.0

A (mm)

Flare tool for R22

clutch type

0 to 0.5

0 to 0.5

0 to 0.5

0 to 0.5

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

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

Nominal

diameter

1/4

3/8

1/2

5/8

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

Flare nut width

(mm)

17

22

26

29

FILE NO. SVM-15058

- 10 -

43° to 45°

45° to 46°

B A

C

D

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

Thickness

(mm)

0.8

0.8

0.8

1.0

1.0

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

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 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

1/4

3/8

1/2

5/8

Outer diameter

(mm)

6.35

9.52

12.70

15.88

Tightening torque

N•m (kgf•cm)

14 to 18 (140 to 180)

33 to 42 (330 to 420)

50 to 62 (500 to 620)

63 to 77 (630 to 770)

Tightening torque of torque

wrenches available on the market

N•m (kgf•cm)

16 (160), 18 (180)

42 (420)

55 (550)

65 (650)

FILE NO. SVM-15058

- 11 -

3-3. Tools

3-3-1. Required Tools

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

No.

1

2

3

4

5

6

7

8

9

10

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

Refrigerant charge

Gas leakage check

Refrigerant charge

R410A

air-water heat pump installation

Existence of
new equipment
for R410A

Ye s

Ye s

Ye s

Ye s

Ye s

Ye s

Ye s

Ye s

(Note 2)

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)

×

×

¡

¡

×

¡

×

(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

FILE NO. SVM-15058

- 12 -

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

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

(For refrigerant charging, see the figure below.)

Connect the charge hose to the vacuum pump
adapter.

Open fully both packed valves at liquid and gas
sides.

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.

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.

(Indoor unit)

(Outdoor unit)

Opened

Opened

Refrigerant cylinder

(with siphon)

Check valve

Open/close
valve for charging

Electronic balance for refrigerant charging

Opened

Closed

Service port

3-4. Recharging of Refrigerant

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

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.

Fig. 3-4-1 Configuration of refrigerant charging

FILE NO. SVM-15058

- 13 -

Gauge manifold

[ Cylinder with siphon ] [ Cylinder without siphon ]

OUTDOOR unit

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Electronic

balance

Refrigerant

cylinder

Electronic

balance

Siphon

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.

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.

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. 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

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.

Fig. 3-4-2

FILE NO. SVM-15058

- 14 -

Nitrogen gas

cylinder

Pipe

Flow meter

M

Stop valve

From Nitrogen cylinder

Nitrogen
gas

Rubber plug

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

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.

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 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.

Fig. 3-5-1 Prevention of oxidation during 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

FILE NO. SVM-15058

- 15 -

4. CONSTRUCTION VIEWS

4-1. Indoor Unit

831

293

Air filter

Heat exchanger

Plasma ion charger
(Air purifier)

Picoion generator

62

64 64

62

70.5 38

590

225 225

137 104

45

293

46

69

174

35

156 156

102 174

65

198

46

Outline of indoor unit

HangerHanger

Installation plate outline

Center line

Hanger

Minimum distance
to wall

Minimum distance

to wall

Minimum distance

to wall 52mm

or more

190mm

or more

225mm

or more

62

64

6

Front panel

Knock out system

270

6 64

62

Knock out system

104.3

312

150 150 150 150

131.5 99

Drain hose
(0.6m)

Connecting pipe(0.37m)
(For 25, 35 Series : Flare

9.52mm)

Connecting pipe(0.41m)
Flare

6.35mm

HangerHanger

63

Remote controller holder

149

26

57

Wiress remote controller

20

188

FILE NO. SVM-15058

- 16 -

4-2. Outdoor Unit

320

306

30

ZView

600

A detail Drawing (Back leg)

320

306

2

-

11 x 14

Hole

(For

10 anchor bolt)

B Detail Drawing (Front leg)

Ø

25 Drain outlet

FAN-GUARD

COVER-PV

Liquid side
(FlareØ6.35)

Gas side
(Flare Ø 9.52 for RAS-10, 13)
(Flare Ø 12.7 for RAS-18)

Service port

2 - Ø11 x 14 Long holes (For Ø8- Ø10 anchor bolt)

Installation dimension

Air outlel

100 or more

100 or more

600 or more

600 or more

Air intlel

Ø

Ø

8-

Ø

Ø

6 hole

86

Ø

6 hole

Ø

11x14 hole

R

15

28

A

320

R5.5

36

108 125

50

137

92

54

600

320

9060090

275

290

550

Ø

436

Z

R15

50

36

320

342

69

2 - R5-5 x 17L Ushape
(For

Ø

8 - Ø10 anchor bolt)

FILE NO. SVM-15058

- 17 -

5.

WIRING DIAGRAM

FILE NO. SVM-15058

- 18 -

6.SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

6-2. Outdoor Unit

No.

Fan motor (for indoor)

2 Room temp. sensor (TA-sensor)

10k

Ω

at 25°C

3 Heat exchanger temp. sensor (TC-sensor)

10kΩ at 25°C

4

5

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

( - )

(

-

)

MP24Z4N

MF-340-30-3

DC250~370V, 30W

Parts n ame

1

Specif icatio nsType

Heat exchanger temp. sensor (TCJ-sensor)

10kΩ at 25°C

(

-

)

No. Parts name Model name Rating

1 Reactor CH-69-Z-T L = 19mH, 10A
2 Outdoor fan motor ICF-140-43-4R DC140V, 43W
3 (Inverter attached) 10kΩ (25°C)
4 (Inverter attached) 62kΩ (20°C)
5

Suction temp. sensor (TS sensor)
Discharge temp. sensor (TD sensor)
Outside air temp. sensor (TO sensor) (Inverter attached) 10kΩ (25°C)

6 Terminal block (5P)

JXO-5B

20A, AC250V

7 Compressor

(10,13k)

DA108X1C-23FZ 3-phases 4-poles 750W

(18k)

DA131S1B-31FZ

3-phases 4-poles 1100W

8

Coil for PMV

CAM-MD12TCTH-5

DC12V

FILE NO. SVM-15058

- 19 -

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-10G2KCVP-T / RAS-10G2ACVP-T
RAS-13G2KCVP-T / RAS-13G2ACVP-T

NOTE :

• The maximum pipe length of this air conditioner is 20m. 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)

Deoxidized copper pipe

Outer dia. : 9.52mm

Thickness : 0.8mm

NOTE :

Gas leak check position
Refrigerant flow

T1

Temp. measurement

INDOOR UNIT

Indoor heat

exchanger

Cross flow fan

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

Sectional shape
of heat insulator

Allowable height

difference : 10m

Allowable pipe length

P Pressure measurement
Gauge attaching port

Vacuum pump connecting port

Strainer

Pulse Modulating
valve at liquid side

Compressor
DA108X1C-23FZ

Outdoor heat

exchanger

Propeller fan

Refrigerant amount : 1.10kg

OUTDOOR UNIT

TC

TA

Max. : 20m

Min. : 1m
Chargeless : 15m

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

TS

TD

Muffler

Temp. measurement

Ø1.2 x 80s
Ø1.2 x 80s

TO
Split capillary

TCJ

FILE NO. SVM-15058

- 20 -

RAS-18G2KCVP-T / RAS-18G2ACVP-T

NOTE :

•

Deoxidized copper pipe
Outer dia. : 12.7mm
Thickness : 0.8mm

NOTE :

Gas leak check position
Refrigerant flow

T1

TO

Temp. measurement

TC

TA

INDOOR UNIT

Indoor heat

exchanger

Cross flow fan

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

Sectional shape
of heat insulator

Allowable height

difference : 10m

Allowable pipe length

P Pressure measurement
Gauge attaching port

Vacuum pump connecting port

Strainer

Pulse Modulating
valve at liquid side

Compressor

DA131S1B-31FZ

Outdoor heat

exchanger

Refrigerant amount : 1.40kg

Propeller fan

OUTDOOR UNIT

Max. : 20m

Min. : 3m
Chargeless : 15m

Strainer

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

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)

Muffler

Accumulater tank

TD

TS

Muffler

FILE NO. SVM-15058

- 21 -

7-2. Operation Data

<Cooling>

Temperature

condition (°C)

Model name

Standard
pressure

P (MPa)

Heat

exchanger
pipe temp.

Indoor
fan mode

Outdoor
fan mode

Compressor

revolution

(rps)

Indoor Outdoor T1 (°C)

27/19 35/-

RAS-10G2KCVP-T

0.9 to 1.1 14 to 17 High High

40

RAS-13G2KCVP-T

0.9 to 1.1 10 to 13 High High

66

RAS-18G2KCVP-T

0.9 to 1.1 10 to 13 High High

73

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

FILE NO. SVM-15058

- 22 -

8. CONTROL BLOCK DIAGRAM

8-1. Indoor Unit

M.C.U.

Indoor Unit Control Unit

Power Supply

Serial Signal Communication

(Operation Command and Information)

Serial Signal Transmitter/Receiver

Micro Switch

Converter

(D.C circuit)

Noise Filter

Indoor

Air purifier

unit

Louver

Motor

Louver Motor
Drive Control

Indoor Fan

Motor Control

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Heat Exchanger Sensor (TC)

Room Temperature Sensor (TA)

Infrared Rays Signal Receiver

and Indication

Functions

· Cold draft preventing Function

· 3-minute Delay at Restart for Compressor

· Fan Motor Starting Control

· Processing

(Temperature Processing)

· Timer / Weekly Timer

· Serial Signal Communication

· Clean Function

· Power Selection

Indoor

Fan Motor

Heat Exchanger Sensor (TCJ)

Infrared Rays, 36.7kHz

Remote Controller

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

Operation Mode Selection

REMOTE CONTROLLER

ECO

Hi-POWER

COMFORT SLEEPPOWER-SEL

WEEKLY ON / OFF

Operation ( )

COMFORT SLEEP

PURE

FILE NO. SVM-15058

- 23 -

AUTO, COOL, DRY

Thermo. Setting

8-2. Outdoor Unit (Inverter Assembly)

OUTDOOR UNIT

For INDOOR UNIT

220 V ~50Hz

MCC5009 (P.C.B)

MICRO-COMPUTER BLOCK DIAGRAM

Compressor

Outdoor

Fan motor

Current

detect

Current

detect

Gate drive

circuit

M.C.U.

• PWM synthesis function

• Input current release control

• IGBT over-current detect control

• Outdoor fan control

• High power factor correction control

• Inverter output frequency control

• A/D converter function

• PMV control

• Discharge temp. control

• Signal communication to indoor unit

Gate drive

circuit

Inverter

(DC AC)

Inverter

(DC AC)

Converter

(AC DC)

PMV : Pulse Motor Valve

M.C.U. : Micro Control Unit

Clock

frequency

4MHz

Driver circuit

of PMV

PMV

High Power

factor Correction

circuit

Input current

sensor

Indoor unit

send/receive

circuit

Noise

Filter

Discharge

temp. sensor

Outdoor air

temp. sensor

Suction

temp. sensor

FILE NO. SVM-15058

- 24 -





9. OPERATION DESCRIPTION

9-1. Outline of Air Conditioner Control

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

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

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

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

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

1. Role of indoor unit controller

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

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

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

• Louver motor control

• Indoor fan motor operation control

• LED (Light Emitting Diode) display control

• Transferring of operation command signal (Serial
signal) to the outdoor unit

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

• Air purifier operation control

2. Role of outdoor unit controller

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

• Compressor operation control

• Operation control of outdoor fan motor

• P.M.V. control

• 4-way valve control

Operations 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

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.

FILE NO. SVM-15058

- 25 -

9-2. Operation Description

1. Basic operation ........................................................................................................... 26

1. Operation control ................................................................................................... 26

2.

Cooling operation .................................................................................................. 27

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

28

4. DRY operation........................................................................................................ 28

2. Indoor fan motor control ............................................................................................. 29

3. Outdoor fan motor control........................................................................................... 31

4. Capacity control .......................................................................................................... 32

5. Current release control ............................................................................................... 32

6. Release protective control by temperature of indoor heat exchanger........................ 33

7.

8.

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

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

2) Air direction adjustment ......................................................................................... 34

3) Swing ..................................................................................................................... 34

9.

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

10.

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

11.

Plasma

ionizer purifier control [Detection of abno

rmality] ......................................... 40

12.

Discharge temperature control ................................................................................... 41

14.

Pulse Modulating valve (P.M.V.) control ..................................................................... 42

15.

Self-Cleaning function ................................................................................................ 43

16.

Remote-A or B selection ............................................................................................ 44

9-3. Auto Restart Function ..

9-3-1. How to Set the A uto Restart Function .............................. ........................................ 50

9-3-2. How to Cancel the Au to Restar t Function ................................................................ 51

9-3-3. Power Failure During Timer Operation ................................................................... 51

21.

POWER

selection mode

....................................................................................47

9-4. Remote Controller and Its Fuctions

9-4-1. Parts Name of Remote Contr oller .............................................................................. 52

9-4-2. Operation of remote control ...................................................................................... 52

17.

QUIET mode ............................................................................................................. 45

18.

COMFORT SLEEP mode ......................................................................................... 45

19.

Short Timer ................................................................................................................ 45

20.

Hi-POWER Mode ..................................................................................................... 46

9-4-3. Name and Functions of Indications on Remote Contr oller ........................................ 61

Outdoor Quiet Control

.........................................................................................47

F

CU Display lamp rightness control .....................................................................48

13.

FILE NO. SVM-15058

- 26 -

Item

1. Basic
operation

Operation flow and applicable data, etc.

1. Operation control

Description

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. The power relay is tumed ON and power supply to the outdoor unit.

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 below, and also controls the

compressor, outdoor fan motor, pulse Modulating valve are controlled.

Remote controller

Control contents of remote controller

• ON/OFF (Air condi

tioner/Air purifier)

• Operation select (COOL/AUTO/DRY)

• Temperature

setup

• Air

direction

• Swing

•

Air

volume select (AUTO/QUIET/LOW/LOW+/MED/MED+/HIGH)

•

ECO

• ON

timer setup

• OFF

timer setup

• Hi-POWER

Selection of

operation

conditions

ON/OFF

•

COMFORT

SLEEP

•

QUIET

•

PRESET

•

ONE-TOUCH

•

POWER-SELECTION

〜

Indoor unit control

Operation command

Power relay

signal Serial

transmission

signalSerial

Inverter

Transmission

Signal

receiving

Outdoor unit

Indoor unit control

• Command signal generating function for
indoor unit operation

• Calculation function (temperature
calculation)

• 3 minute delay function for compressor
reactivation

• Activation compensation function for indoor
fan

• Cold draft preventive function

•

Timer

function

• Indoor heat exchanger release control

Outdoor unit control

• Inverter output frequency
control

• Waveform composite function

•

Calculation

function

(temperature calculation)

• AD conversion function

• Compressor reactivation delay
function

• Current release function

• GTr overload protective function

• Outdoor temperature estimation

• Indoor fan motor

• Louver motor

Compressor•

• Outdoor fan motor

•

Pulse modulating valve

In

door unit

•

A/B

Selection

function

•

Contront

air

flow

(wide

angle/Right

wide/Left

wide/spot

front/spot right/spot

lift)

FILE NO. SVM-15058

- 27 -

Item

1. Basic
operation

Operation flow and applicable data, etc.

2.

Description

Cooling/Heating operation

The operations are performed in the following parts by controls acc

ording to cooling conditions.

1)

Receiving the operation ON signal of the remote controller, the cooling 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
according to the operation signal sent from the indoor unit.

Remote control

settings

Operation ON

Indoor unit control

Operation command

signal transmission

Outdoor unit control

Power relay ON

Indoor fan motor

revolution control

Compressor revolution control
Outdoor fan motor revolution
control
Pulse modulating valve control

FILE NO. SVM-15058

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Item

1. Basic
operation

Operation flow and applicable data, etc.

Description

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.

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

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

(Ts) + (0.0 to 1.0)

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

Tsc

+

0.5

+

1.0

[°C]

Ta

Fan speed

L– (W5)

(W5+W3) / 2

SUL (W3)

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.

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)

Ts + 1

Ta

Cooling operation

Monitoring (Fan)

In AUTO mode, when room temperature
reach set temperature commpressor will
stop.

FILE NO. SVM-15058

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Item

2. Indoor fan
motor control

Operation flow and applicable data, etc.

<In cooling operation>

(This operation controls the fan speed at indoor unit side.)
The indoor fan

(cross flow fan) is operated by the phase­control induction motor. The fan rotates in 5 stages in
MANUAL mode, and in 5 stages in AUTO mode, respec­tively. (Table 1)

Description

* Symbols

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

Ultra Low

SUL : Super Ultra Low

* The values of fan speed and air flow

volume indicate on the table are
measured when the louver is inclined
downward. Fan speed and air flow
volume broadly vary with position

(Fig. 1)

(Fig. 2)

+2.5

Ta

[°C]

+2.0

+1.5

+1.0

+0.5

Tsc

a

b

c

d

e

M+(WC)

*3

*4

*5

L(W7)

Air volume AUTO

L
L+
M
M+
H

W7

(L + M) / 2

WA

(M + H) / 2

WD

Indication

Fan speed

Fan speed setup

COOL ON

AUTO

MANUAL

*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

(Linear approximation
from M+ and L)

(Table 1) Indoor fan air flow rate

Quiet

W5

of louver.

1) When setting the fan speed to L,
L+, M, M+,H or Quiet 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.

RAS-10G2KCVP-T RAS-13G2KCVP-T RAS-18G2KCVP-T

Cooling Cooling Cooling

Fan speed Air Flow rate Fan speed Air Flow rate Fan speed Air Flow rate

(rpm)

(m3/h)

(rpm)

(m3/h)

(rpm)

(m3/h)

WF

UH/H

1060 661 1100 690 1120 713

WE

UH

1060 661 1100 698 1120 713

WD

H UH

1040 647 1080 676 1120 713

WC

M+ M+ H

900 527 930 551 960 576

WB

M+

900 527 930 551 950 567

WA

M M/L+ M

760 409 780 423 800 442
W9 760 409 780 423 800 442
W8

L+ L+

690 349 710 368 730 384
W7

L L

600 274 640 305 660 322
W6

L- L

520 205 560 243 580 255
W5

UL L- L-

500 187 540 224 560 243
W4

UL

480 173 520 205 540 224
W3

SUL UL

SUL/SL-

460 155 500 187 520 205
W2

SL

450 147 480 173 500 187
W1

SL-

440 142 440 142 440 142

Fan speed

Cool PAP Dry

Level

FILE NO. SVM-15058

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