Toshiba RAS-B10UFV-E, RAS-B13UFV-E, RAS-B18UFV-E SERVICE MANUAL

SERVICE MANUAL

Indoor Unit Outdoor Unit

<Console, Heat Pump Type> <Heat Pump Type>

FILE NO. SVM-10044

SPLIT TYPE

RAS-B10UFV-E RAS-10SAV2-E
RAS-B13UFV-E RAS-13SAV2-E

RAS-B18UFV-E

RAS-18SAV-E

RAS-18SAV2-E

R410A

April, 2010

CONTENTS

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

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

3. REFRIGERANT R410A ............................................................................. 9

4. CONSTRUCTION VIEWS ........................................................................ 17

5. WIRING DIAGRAM .................................................................................. 20

6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 22

7. REFRIGERANT CYCLE DIAGRAM ........................................................ 24

8. CONTROL BLOCK DIAGRAM ................................................................ 27

9. OPERATION DESCRIPTION................................................................... 29

10. INSTALLATION PROCEDURE ................................................................ 62

11. HOW TO DIAGNOSE THE TROUBLE...................................................... 76

12. HOW TO REPLACE THE MAIN PARTS................................................... 98

13. EXPLODED VIEWS AND PARTS LIST ................................................. 122

– 2 –

1. SAFETY PRECAUTIONS

SAFETY PRECAUTIONS

The important contents concerned to the safety are described on the product itself and on this Service Manual.
Please read this Service Manual after understanding the described items thoroughly in the following contents
(Indications/Illustrated marks), and keep them.

[Explanation of indications]

Indication Explanation

DANGER

WARNING

CAUTION

* Property damage : Enlarged damage concerned to property, furniture, and domestic animal/pet

Indicates contents assumed that an imminent danger causing a death or serious injury of the
repair engineers and the third parties when an incorrect work has been executed.

Indicates possibilities assumed that a danger causing a death or serious injury of the repair
engineers, the third parties, and the users due to troubles of the product after work when an
incorrect work has been executed.

Indicates contents assumed that an injury or property damage (*) may be caused on the repair
engineers, the third parties, and the users due to troubles of the product after work when an
incorrect work has been executed.

[Explanation of illustrated marks]

Mark Explanation

Indicates prohibited items (Forbidden items to do)
The sentences near an illustrated mark describe the concrete prohibited contents.

Indicates mandatory items (Compulsory items to do)
The sentences near an illustrated mark describe the concrete mandatory contents.

Indicates cautions (including danger/warning)
The sentences or illustration near or in an illustrated mark describe the concrete cautious contents.

For general public use

Power supply cord of outdoor unit shall be 1.5 mm ² (H07RN-F or 60245IEC66) polychloroprene sheathed flexible
cord.

• Read this “SAFETY PRECAUTIONS” carefully before servicing.

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

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

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

CAUTION

New Refrigerant Air Conditioner Installation

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

R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure
of R410A refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with the adoption of the new refrigerant, the
refrigeration machine oil has also been changed. Therefore, during installation work, be sure that water, dust, former
refrigerant, or refrigeration machine oil does not enter into the new type refrigerant R410A air conditioner circuit.
To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port on main unit and
installation tools are different from those used for the conventional refrigerant units.
Accordingly, special tools are required for the new refrigerant (R410A) units. For connecting pipes, use new and clean piping
materials with high pressure fittings made for R410A only, so that water and/or dust does not enter. Moreover, do not use the
existing piping because there are some problems with pressure fittings and possible impurities in existing piping.

– 3 –

CAUTION

TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY

A switch or circuit breaker that can disconnect all poles must be included in the fixed wiring.
Be sure to use an approved circuit breaker or switch.

DANGER

• ASK AN AUTHORIZED DEALER OR QUALIFIED INSTALLATION PROFESSIONAL TO INSTALL/ MAINTAIN THE AIR
CONDITIONER.
INAPPROPRIATE SERVICING MAY RESULT IN WATER LEAKAGE, ELECTRIC SHOCK OR FIRE.

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

HIGH VOLTAGE

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

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

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

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

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

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

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

WARNING

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

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

if the unit falls.

• After the installation work, confirm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas may generate.

• The electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make

sure the air conditioner uses an exclusive circuit.

An insufficient circuit capacity or inappropriate installation may cause fire.

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

cable from affecting the terminals.

• Be sure to provide grounding.
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables.

• Conform to the regulations of the local electric company when wiring the power supply.
Inappropriate grounding may cause electric shock.

– 4 –

CAUTION

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

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

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

• Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.

For Reference:

If a heating operation would be continuously performed for a long time under the condition that the outdoor
temperature is 0°C or lower, drainage of defrosted water may be difficult due to freezing of the bottom plate,
resulting in a trouble of the cabinet or fan.
It is recommended to procure an antifreeze heater locally for a safe installation of the air conditioner.
For details, contact the dealer.

– 5 –

2. SPECIFICATIONS

2-1. Specifications

Unit model Indoor

Outdoor
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply

Electric Indoor Operation mode
characteristic Running current (A)

Power consumption (W)
Power factor (%)

Outdoor Operation mode

Running current (A)
Power consumption (W)
Power factor (%)

Starting current (A)
COP (Cooling / Heating) 4.20
Operating Indoor High (Cooling / Heating) (dB-A)
noise Medium (Cooling / Heating) (dB-A)

Low (Cooling / Heating) (dB-A)

Outdoor (Cooling / Heating) (dB-A)

Indoor unit Unit model

Dimention Height (mm)

Width (mm)

Depth (mm)

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

Outdoor unit Unit model

Dimention Height (mm)

Width (mm)

Depth (mm)

Net weight (kg)
Compressor Motor output (W)

Type

Model

Fan motor output (W)

Air flow rate (Cooling / Heating)
Piping Type
connection Indoor unit Liquid side (mm)

Gas side (mm)

Outdoor unit Liquid side (mm)

Gas side (mm)
Maximum length (m)
Maximun charge-less length (m)
Maximum height difference (m)

Refrigerant Name of refrigerant

Weight (kg)

Wiring Power supply
connection Interconnection 4 Wires:Includes earth 4 Wires:Includes earth 4 Wires:Includes earth 4 Wires:Includes earth
Usable temperature range Indoor (Cooling / Heating)

Outdoor (Cooling / Heating)

Accessory Indoor unit Installation plate

Wireless remote controller

Batteries

Toshiba New IAQ Filter

Install screw

Remote controller holder

Pan head wood screw

for Remote control holder

Insulate pipe

Installation manual

Owner's manual
Outdoor unit Drain nipple

Water-proof rubber cap

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

3

(m

3

(m

RAS-B10UFV-E
RAS-10SAV2-E

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

Cooling Heating

0.17-0.15
20
54

Cooling

2.90-2.66

575

90 94

RAS-B10UFV-E

/ min)

RAS-10SAV2-E

Single rotary type with

DC-inverter variable

DA89X1C-23FZ2

/ min)

Flare connection

3 Wires:Includes earth

o

C)

(

o

C)

(

2.5

1.1-3.1

3.2

0.9-4.8

0.20-0.19
25
56

Heating

3.51-3.21

725

3.71-3.40

4.20/4.27
39/39
32/32
26/26
46/47

600
700
220

16
41

7.8/8.5

550
780
290

33

750

speed control

43

30/30

∅6.35
∅9.52
∅6.35
∅9.52

20
15
10

R410A

0.8

21-32/0-28

-10-46/-15-24
1
1
2
2
8
1

2
1

1
1
1
2

RAS-B13UFV-E
RAS-13SAV2-E

3.5

1.1-4.1

4.2

1.0-5.4
1Ph/50Hz/220-240V
1Ph/60Hz/220-230V

Cooling Heating

0.20-0.19 0.24-0.22
25 30
56 57

Cooling

4.52-4-14 5.18-4.75

Heating

945 1095

95 96

5.42-4.97

3.61-3.73
40/40
33/33
27/27
48/50

RAS-B13UFV-E

600
700
220

16
41

8.5/9.2

RAS-13SAV2-E

550
780
290

33

750

Single rotary type with

DC-inverter variable

speed control

DA89X1C-23FZ2

43

37.5/37.5

Flare connection

∅6.35
∅9.52
∅6.35
∅9.52

20
15
10

R410A

0.8

3 Wires:Includes earth

21-32/0-28

-10-46/-15-24
1
1
2
2
8
1

2
1

1
1
1
2

RAS-B18UFV-E

RAS-18SAV-E

5.0

1.0-5.7

5.8

1.1-6.3
1Ph/50Hz/220-240V
1Ph/60Hz/220-230V

Cooling Heating

0.27-0.24 0.30-0.28
35 40
60 60

Cooling

7.54-6.91 8.19-7.50

Heating

1625 1765

98 98

8.49-7.78

3.01/3.21
46/46
40/40
34/34
49/50

RAS-B18UFV-E

600
700
220

16
41

10.0/10.7

RAS-18SAV-E

550
780
290

39

1100

Twin rotary type with
DC-inverter variable

speed control

DA130A1F-27F

43

31.9/31.9

Flare connection

∅6.35
∅12.7
∅6.35
∅12.7

20
15
10

R410A

1.4

3 Wires:Includes earth

21-32/0-28

-10-46/-15-24
1
1
2
2
8
1

2
1

1
1
1
2

RAS-B18UFV-E
RAS-18SAV2-E

5.0

1.0-5.7

5.8

1.1-6.3
1Ph/50Hz/220-240V
1Ph/60Hz/220-230V

Cooling Heating

0.27-0.24 0.30-0.28
35 40
60 60

Cooling Heating

7.54-6.91 8.19-7.50

1625 1765

98 98

8.49-7.78

3.01/3.21
46/46
40/40
34/34
49/50

RAS-B18UFV-E

600
700
220

16
41

10.0/10.7

RAS-18SAV2-E

550
780
290

41

1100

Twin rotary type with
DC-inverter variable

speed control

DA130A1F-27F

43

36.3/31.9

Flare connection

∅6.35
∅12.7
∅6.35
∅12.7

20
15
10

R410A

1.4

3 Wires:Includes earth

21-32/0-28

-10-46/-15-24
1
1
2
2
8
1

2
1

1
1
1
2

– 6 –

2-2. Combined multi-split outdoor unit

The multi-split outdoor units, which can be combined with B**UFV-E series indoor unit are as described below:

Outdoor

unit type B18UFV-E B13UFV-E B10UFV-E

2-room Multi X

outdoor unit X

3-room Multi X

outdoor unit

4-room Multi

outdoor unit

5-room Multi

outdoor unit

Combined outdoor unit

model name
RAS-M14GAV-E
RAS-M18GAV-E

RAS-3M18SAV-E

RAS-3M26GAV-E1

RAS-4M23SAV-E

RAS-4M27GAV-E1

RAS-5M34UAV-E

: Combination available
X : Combination unavailable

Indoor unit model name

This service manual describes about B**UFV-E series indoor units only.
For the multi-split outdoor unit to be combined, refer to the service manual.

Outdoor unit

Heat Pump Model

RAS-M14GAV-E

RAS-M18GAV-E
RAS-3M18SAV-E
RAS-4M23SAV-E

RAS-3M26GAV-E1,RAS-4M27GAV-E1

RAS-5M34UAV-E

File name

A05-009-1

A06-013
A06-014
A08-016
A09-011

– 7 –

2-2. Operation Characteristic Curve

<Cooling> <Heating>

10

9

RAS-B18UFV-E

8

7

RAS-B10UFV-E

RAS-B13UFV-E

6

5

4

Current (A)

3

2

1

0

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

Compressor Speed (rps)

10

RAS-B18UFV-E

9

RAS-B10UFV-E

8

RAS-B13UFV-E

7

6

5

4

Current (A)

3

2

1

0

0 102030405060708090100110120

Compressor Speed (rps)

2-3. Capacity Variation Ratio According to Temperature

<Cooling>

105

100

RAS-B10UFV-E

95

90

85

80

75

Capacity ratio (%)

70

65

60

Capacity ratio:100%=

2.5kW(

RAS-B10UFV-E)

3.5K

W(RAS-B13UFV-E)

5.0KW(RAS-B18UFV-E)

55

50

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

Outdoor temp. (℃)

RAS-B13UFV-E

RAS-B18UFV-E

Conditions
Indoor:DB27℃/ WB19℃
Indoor air flow:High
Pipe length:5m (10k,13k)

:7.5m (18k)

<Heating>

120

Capacity ratio:100%=

3.2kW(RAS-B10UFV-E)

100

Heating Capacity ratio (%)

80

60

40

20

4.2kW(RAS-B13UFV-E)

5.8kW(RAS-B18UFV-E)

RAS-B10UFV-E
RAS-B13UFV-E
RAS-B18UFV-E

Condition
Indoor:DB20℃
Indoor air flow:High
Pipe length:5m (10k,13k)

:7.5m (18k)

0

-15 -10 -5 0 5 10

Outdoor temp. (℃)

– 8 –

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.

– 9 –

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 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

– 10 –

d) Flare Processing

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

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

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

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

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

Nominal

diameter

Outer

diameter

(mm)

Thickness

(mm)

Fig. 3-2-1 Flare processing 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

– 11 –

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 manufacturers. Table 3-2-7 shows reference values.

NOTE :

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

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

Nominal

diameter

Outer diameter

(mm)

Tightening torque

N•m (kgf•cm)

Tightening torque of torque

wrenches available on the market

N•m (kgf•cm)

1/4

3/8

1/2

5/8

6.35

9.52

12.70

15.88

14 to 18 (140 to 180)

33 to 42 (330 to 420)

50 to 62 (500 to 620)

63 to 77 (630 to 770)

– 12 –

16 (160), 18 (180)

42 (420)

55 (550)

65 (650)

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

Conventional air-water
heat pump installation

Whether new equipment
can be used with
conventional refrigerant

Ye s

*(Note 1)

No

No

Ye s

Ye s

No

Ye s

No

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

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)

R410A

Whether conven­tional equipment
can be used

*(Note 1)

*(Note 1)

No

No

No

Ye s

No

No

No

(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

– 13 –

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.)

CAUTION

1. Never charge refrigerant exceeding the specified amount.

2. If the specified amount of refrigerant cannot be charged, charge refrigerant bit b y 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

– 14 –

NOTE :

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

NOTE :

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

3-5. Brazing of Pipes

3-5-1. Materials for Brazing

1. Silver brazing filler

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

2. Phosphor bronze brazing filler

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

Electronic

balance

Siphon

Fig. 3-4-2

REQUIREMENT :

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.

– 15 –

2. Characteristics required for flux

• Activated temperature of flux coincides with the
brazing temperature.

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

• It is easy to remove slag after brazing.

• The corrosive action to the treated metal and
brazing filler is minimum.

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

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

3. Types of flux

• Noncorrosive flux

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

• Activated flux

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

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

3-5-3. Brazing

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

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

CAUTION

Never use gas other than Nitrogen gas.

1. Brazing method to prevent oxidation

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

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

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

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

5) Adjust the flow rate of Nitrogen gas so that it
is lower than 0.05 m
(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.

3

/Hr or 0.02 MPa

Piping material

Copper - Copper

Copper - Iron

Iron - Iron

NOTE :

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

– 16 –

– 17 –

4-2. Outdoor Unit

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

28

A

108 125

600

320

50

36

306

R5.5

R

Ø

6 hole

15

A detail Drawing (Back leg)

290

86

320

Ø

FAN-GUARD

436

Ø

550

275

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)

Installation dimension

– 18 –

4-3. Outdoor Unit

RAS-18SAV-E

69.5

147

320

Anchor bolt

long hole pitch

218

550

A leg part

290

306

Dia.7 hole pitch

B leg part

6

48335

44952

32 500

Dia.436 108

483

780

600

20

257

4-dia.4.5 embossment

90

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

8-dia.7 hole
(For fixing outdoor unit)

Dia.11 × 14 long hole
(For dia.8-10 anchor bolt)

Packed valve cover

Fan guard

22

25

93

71

Charging port

137

145

157

5454

31 143

342

79

21

Connecting pipe port

(Pipe dia.6.35)

Connecting pipe port

(Pipe dia.12.7)

Z

88

28

2-dia.11 × 14U-shape hole

Intake

100 or more

320

C

Drain long hole

Dia.25

20

Drain hole

D

108 125

Fin guard

Z view

50 or more

60

600

Outside line
of product

88

Intake

20

30

250 or more

A

(Minimum distance from wall)

600

54
38

R15

2-dia.7 hole

320

R5.5

Outside line

11

of product

Detailed A leg part

11

2-dia.7 hole

320

R5.5

38
54

600

Outside line
of product

R15

Detailed B leg part

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

Unit : mm

200 or more

B

Outlet

2-dia.11 × 14 long hole

Mounting dimensions of anchor bolt

– 19 –

5. WIRING DIAGRAM

5-1. RAS-B10UFV-E / RAS-10SAV2-E

RAS-B13UFV-E / RAS-13SAV2-E

P11

P08

Q404

CN300

~

P.C.BOARD
(MCC-5009)

R321

3

3

2

2

1

1

BLK
WHI

FM

RED

FAN MOTOR

R320

CN700

F03

FUSE

T3.15A

R319

L01

VARISTOR

CN603

P01 P02

BLK WHI

P32

P30P31P33

CN701

P07
BLK

POWER

SUPPLY

~

220-240V ,50Hz

~

220-230V ,60Hz

Outdoor Terminal Block

Indoor Terminal Block

POWER SUPPLY
(From outdoor unit)

1∅ 220-240~ ,50Hz
1∅ 220-230~ ,60Hz

BLK

Heat Exchanger Senso r

(TC)

Heat Exchanger Senso r

(TCJ)

BLK

BLK
BLK

BLK
BLK

Thermo Sensor
(TA)

RED

3

2

3

RED

WHI

CN501 CN03 CN01

121

CN602

(BLU)

2

121

CN603

(YEL)

2

CN601

121

(WHI)

2

1

CN604

22

(WHI)

CN212
(WHI)

1 342

HA

CN201

(WHI)

112 3 8910

BLU

CN51
(WHI)

1

12

BLK

4455667

BLU

BLU

BLU

Heat
Exchanger

GRN&YEL

Fan Motor Base

GRN&YEL

7

BLU

13
13

1112

Wireless Unit

Varistor

R01

CN261

(WHI)

9101112

67

8

910

657

8

Assembly

WP-021

SHEET
METAL

Main P.C Board

MCC-5068A

T3.15A
250VAC
Fuse F01

Line
Filter

CN401

445

ORG

44123

(RED)

3

11223

BLU

BLU

WHI

3

12

567

ORG

5

21

CN21

1

RED

BLK

DC5V
DC12V
DC29V

~

-

+

~

CN301

(WHI)

5

6643 1

43 1

5

WHI

YEL

BLU

45 321

DC MOTOR

CN801

+

BLK

456123

RED

Fan Motor

1

1

232

3

44
55
6

6

7

7
8

8

9

9

10

10

11

11
12

12

13

13

14

14

15

15

16

16

17

17

Power Supply Circuit

18

18
19

20

20
21
22
23
24
25
26

CN381

(WHI)

WHI
YEL
YEL
YEL
YEL

WHI

YEL
YEL

YEL

YEL

ORG

Color indication

YEL : YELLOW
BLK : BLACK
RED : RED
BLU : BLUE
WHI : WHITE
ORG : ORANGE
GRN & YEL :
GREEN & YELLOW

1
2
3
4
5

1
2
3
4
5

Stepper motor

(Vertical air flow louver)

1

1

1

2

2

2

3

3

3

4

4

4

5

5

5

1

1

1

2

2

2
3

3

3

4

4

4

5

5

5

Stepper motor

(Damper)

– 20 –

5-2. RAS-B18UFV-E / RAS-18SAV2-E

Outdoor Te rminal Block

Indoor Terminal Block

POWER SUPPLY
(From outdoor unit)

1∅ 220-240~ ,50Hz
1∅ 220-230~ ,60Hz

BLK

Heat Exchanger Sensor

(TC)

Heat Exchanger Sensor

(TCJ)

BLK

BLK
BLK

BLK
BLK

Thermo Sensor
(TA)

RED

3

2

3

RED

WHI

CN501 CN03 CN01

121

CN602

(BLU)

2

121

CN603

(YEL)

2

CN601

121

(WHI)

2

1

CN604

22

(WHI)

BLU

112

CN201

(WHI)

3

CN51
(WHI)

CN212

(WHI)

1 342

HA

1

12

BLK

556

4
4

BLU

BLU

Heat
Exchanger

GRN&YEL

Fan Motor Base

GRN&YEL

7

6

7

BLU

BLU

13
13 8

Wireless Unit

Varistor

R01

CN261

(WHI)

8910

89101112

657

9101112

Assembly

WP-021

SHEET
METAL

Main P.C Board

MCC-5068A

T3.15A
250VAC
Fuse F01

Line
Filter

CN401

445

ORG

44123

3

BLU

BLU

(RED)

11223

WHI

123

567

ORG

567

21

CN21

1

RED

BLK

DC5V
DC12V

DC29V

~

-

+

~

CN301

(WHI)

5566

YEL

BLU

45 321

DC MOTOR

CN801

3

45612

+

43 1
43 1

WHI

BLK

10

11
12
13
14
15
16
17

Power Supply Circuit

18
19
20
21
22
23
24
25
26

CN381

RED

Fan Motor

1
232

55
6
7
8
9

10

11
12
13
14
15
16
17
18

20

(WHI)

1

3

44

6

7

8

9

ORG

WHI

YEL

WHI
YEL
YEL
YEL
YEL

YEL
YEL

YEL

1
2
3
4
5

1
2
3
4
5

Stepper motor

(Vertical air flow louver)

1

1

1

2

2

2

3

3

3

4

4

4

5

5

5

1

1

1

2

2

2

3

3

3

4

4

4

5

5

5

Stepper motor

(Damper)

Color indication

YEL : YELLOW
BLK : BLACK
RED : RED
BLU : BLUE
WHI : WHITE
ORG : ORANGE
GRN & YEL :
GREEN & YELLOW

– 21 –

6-1. Indoor Unit

No.

1

Fan motor (for indoor)

6. SPECIFICATIONS OF ELECTRICAL PARTS

Parts n ame

ICF-340-41-1 DC340, 41W

Specif icatio nsType

2 Room temp. sensor (TA-sensor)

3

Heat exchanger temp. sensor (TC-sensor)

Heat exchanger temp. sensor (TCJ-sensor)

4

5 Louver motor

6

Dumper motor

10kΩ
10kΩ

( - )

( - )

( - )

MP24Z3T

MP24Z3T

10kΩ at 25°C

at 25°C

at 25°C

Output (Rated) 1W, 16 poles, DC12V

Output (Rated) 1W, 16 poles, DC12V

6-2. Outdoor Unit

No.

1 Reactor

2 Outdoor fan motor DC140V, 43W

3 Suction temp. sensor (TS sensor)

4 Discharge temp. sensor (TD sensor)

5 Outside air temp. sensor (TO sensor)

Parts name Model name Rating

RAS-10SAV2-E, RAS-13SAV2-E

RAS-18SAV2-E

CH-69

CH-57

ICF-140-43-4R

(Inverter attached)

(Inverter attached)

(Inverter attached)

L = 19mH, 10A

L = 10mH, 16A

10k (25°C)

62k (20°C)

10k (25°C)

6 Heat exchanger temp. sensor (TE sensor)

7 Terminal block (5P) AC250V, 20A

Compressor 3-phases 4-poles

8

9 Coil for PMV DC12V

10 Coil for 4-way valve AC220-240V

RAS-10SAV2-E, RAS-13SAV2-E

RAS-18SAV2-E

(Inverter attached)

DA89X1C-23FZ2

DA130A1F-27F

CAM-MD12TCTH-5

STF-01AJ646A1

10k (25°C)

– 22 −

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-B10UFV-E / RAS-10SAV2-E
RAS-B13UFV-E / RAS-13SAV2-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

TS

Muffler

Muffler

Compressor
DA89X1C-23FZ2

Outdoor heat

exchanger

Turbo 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

Max. : 20m
Min. : 1m

Chargeless : 15m
Charge : 20g/m

(16 to 20m)

Allowable pipe length

TE

Temp. measurement

T2

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)

– 23 –

7-2. Refrigerant Cycle Diagram

RAS-B18UFV-E / RAS-18SAV-E

RAS-B18UFV-E / RAS-18SAV2-E

P

Pressure measurement
Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe
Outer dia. : 12.7mm

Thickness : 0.8mm

4-way valve
(STF-0108Z)

Accumulater tank

Deoxidized copper pipe
Outer dia. : 6.35mm

Thickness : 0.8mm

Muffler

Muffler

Compressor
DA130A1F-27F

INDOOR UNIT

Indoor heat

exchanger

Turbo fan

Sectional shape
of heat insulator

TD

T1 Temp. measurement

TC

TA

difference: 10m

Allowable height

Strainer

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

Max. : 20m
Min. : 2m
Chargeless : 15m
Charge : 20g/m

(16 to 20m)

Allowable pipe length

TS

TO

Outdoor heat
exchanger

Propeller fan

Split capillary
2-dia. 1.2 × 80

TE

Distributor

T2

OUTDOOR UNIT

Temp. measurement

NOTE:

Refrigerant flow (Cooling)
Refrigerant flow (Heating)

Refrigerant amount: 1.40kg

Gas leak check position

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)

– 24 –

7-2. Operation Data

<Cooling>

Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor

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

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

27/19 35/- B10UFV-E 0.9 to 1.1 12 to 14 41 to 43 High High 49

B13UFV-E 0.8 to 1.0 10 to 12 39 to 41 High High 74
B18UFV-E 0.8 to 1.0 8 to 10 37 to 39 High High 77

<Heating>

Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor

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

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

20/- 7/6 B10UFV-E 2.1 to 2.3 37 to 39 2 to 4 High High 62

B13UFV-E 2.4 to 2.6 41 to 43 1 to 3 High High 84
B18UFV-E 2.9 to 3.0 49 to 51 1 to 3 High High 75

NOTES :

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

2. Connecting piping condition : 5 m (10k, 13k) and 7.5 m (18k)

– 25 –

8-1. Indoor Unit

8. CONTROL BLOCK DIAGRAM

Heat Exchanger Sensor (TCJ)

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
Drive Control

Indoor Fan

Motor Control

Damper

Drive Control

Louver

Motor

Indoor

Fan Motor

Damper

Motor

From Outdoor Unit

~

220-240V

220-230V ~60Hz

50Hz

REMOTE CONTROL

Serial Signal Communication

(Operation Command and Information)

Remote Control

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN ONLY

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

FLOOR (ON/OFF)

ECO

Infrared Rays, 36.7kHz

Hi-POWER

COMPORT SLEEP

QUIET

– 26 –

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.

230V ~60Hz

−

220–240 V ~50Hz

220

For INDOOR UNIT

Discharge

temp. sensor (TD)

Outdoor air

temp. sensor (TO)

Suction temp.

– 27 –

sensor (TS)

Heat exchanger

temp.sensor (TE)

9. OPERATION DESCRIPTION

9-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air
conditioner, which uses DC motor for the indoor fan
motor and the outdoor fan motor. And the capacity­proportional control compressor which can change the
motor speed 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
or indoor unit display buttons 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.

NOTE :

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 control or indoor unit
display buttons, and assumesthe 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

2. Role of outdoor unit controller

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

• Compressor operation control

• Operation control of outdoor fan motor

• P.M.V. control

• 4-way valve control

.

Operations followed to judgment

.

of serial signal from indoor side.

.

• Detection of inverter input current and current
release operation

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

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

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

• Detection of outdoor temperature and operation
revolution control

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

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

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

• Operation mode set on the remote controller

• Compressor revolution command signal defined

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

• Temperature of indoor heat exchanger

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

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

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

The following signals are sent from the outdoor unit
controller.

• The current operation mode

• The current compressor revolution

• Outdoor temperature

• Existence of protective circuit operation

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

Contents of judgment are described below.

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

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

unit controller, it is assumed as a trouble.

– 28 –

9-2. Operation Description

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

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

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

3. AUTO operation ......................................................................................................31

4. DRY operation........................................................................................................ 32

2. Indoor fan motor control ............................................................................................. 33

3. Outdoor fan motor control........................................................................................... 36

4. Capacity control .......................................................................................................... 38

5. Current release control ............................................................................................... 38

6. Release protective control by temperature of indoor heat exchanger........................ 39

7. Defrost control (Only in heating operation) ................................................................ 40

8. Air outlet selection ...................................................................................................... 41

9. Lower air outlet louve control ...................................................................................... 42

10. Upper air outlet louver control .................................................................................... 43

11. ECO operation ........................................................................................................... 44

12. Test operation ............................................................................................................ 45

13. Discharge temperature control ................................................................................... 45

14. Pulse Modulating valve (P.M.V.) control ...................................................................... 46

15. Self-Cleaning function ................................................................................................. 47

16. Selt-Cleaning function release .................................................................................... 48

17. Remote-A or B selection ............................................................................................ 49

18. QUIET mode ............................................................................................................. 50

19. COMFORT SLEEP ................................................................................................... 50

20. Short Timer ................................................................................................................ 50

21. One-Touch Comfort .................................................................................................. 51

22. Hi-POWER Mode ...................................................................................................... 51

23. FIL

24. Set temp. correction .................................................................................................. 52

25. Outdoor Quiet control ................................................................................................. 53

TER Indicator ...............................................................................................51

9-3. Auto Restart Function ................................................................................................55

9-3-1. How to Set the A uto Restart Function .............................. ........................................ 55

9-3-2. How to Cancel the Au to Restar t Function ................................................................. 56

9-3-3. Power Failure During Timer Operation .................................................................... 56

9-4. Remote Control ....................................................................................................... 57

9-4-1. Remote control and its functions ................................................................................. 57

9-4-2. Operation of remote control ...................................................................................... 57

9-4-3. Name and Functions of Indications on Remote Contr oller ........................................ 63

9-5. Indoor Unit Display & Unit Operation Panel .........................................................64

– 29 −

Item

Operation flow and applicable data, etc.

Description

1. Basic
operation

Selection of

operation conditions

ON/OFF

1. Operation control

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

1) The operation conditions are selected by the remote controller or indoor unit display buttons as
shown in the bolow.

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

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

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

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

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

Remote controller

Control contents of remote controller

• ON/OFF

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

• Temperature setup

• Air direction

• Swing

• Air volume select

(AUTO/LOW/LOW+/MED/MED+/HIGH)

• ECO

• ON timer setup

• OFF timer setup

• Hi-POWER

• COMFORT SLEEP

• QUIET

• PRESET

• ONE-TOUCH

• FLOOR

Indoor unit display buttons

Selecton

of

operation
conditions

Control contents of
unit display buttons

• ON/OFF

• Operation select

(AUTO/COOL/HEAT)

• Temperature setup

• Air outlet select

(AUTO/Upper/Lower

Signal receiving

Indoor unit control

Operation command

Serial signal send/receive

Serial signal send/receive

Outdoor unit control

Indoor unit

Indoor unit control

• Command signal generating function of
indoor unit operation

• Calculation function (temperature calculation)

• Activation compensation function of indoor fan

• Cold draft preventive function

• Timer function

• Indoor heat exchanger release control

Outdoor unit

Outdoor unit control

• Frequency control of inverter output

• Waveform composite function

• Calculation function
(Temperature calculation)

• AD conversion function

• Quick heating function

• Delay function of compressor reactivation

• Current release function

• GTr over-current preventive function

• Defrost operation function

• Indoor fan motor

• Louver motor

~

Inverter

• Compressor

• Outdoor fan motor

• 4-way valve

• Pulse Modulating valve
(P.M.V.)

–30 –