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 –

Ite m

Operation flow and applicable data, etc.

Description

1. Basic
operation

2. Cooling/Heating operation

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

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

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

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

Operation ON

Indoor unit control

Sending of operation command signal

Outdoor unit control

Setup of remote controller

Indoor fan motor control / Louver control / Operation Hz
Control (Requierment)

Compressor revolution control / Outdoor fan motor control /
Operation Hz control (Include limit control)
4-way valve control In cooling operation: ON

In heating operation: OFF
Pulse Modulating valve control

[ ]

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.

Ta

Cooling operation

Ts + 1

Monitoring (Fan)

Ts – 1

Heating operation

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

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

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

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

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

− 31−

Ite m

Operation flow and applicable data, etc. Description

1. Basic
operation

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.

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) + (-1.0 to 0.0)

3) When the room temperature is lower
2°C or less than the setup temperature,
turn off the compressor.

4) The time correction is performed every
8 minutes.

TA speed correction

Zone

(°C)

+4.5
+4.0
+3.5
+3.0
+2.5

+2.0
+1.5
+1.0
+0.5

0.0

−0.5

−1.0

−1.5

−2.0

12 35 37 49 W8
11 32 34 42 W6
10 30 31 36

9272830
8252624
7222318
6202011
5W5
4W4
3
2
1

0

Compressor speed (rps)

B10UFV B13UFV B18UFV

OFF OFF OFF (min 1)

Fan Time

+1 zone

±0

−1 zone

− 32 −

Item

Operation flow and applicable data, etc.

Description

2. Indoor fan
motor control

COOL ON

Fan speed setup

AUTO

TA-Tsc

[°C]

+2.5

a

+2.0

b

+1.5

c

+1.0

d

+0.5

e

Tsc

<In cooling operation>

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

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

MANUAL

(Fig. 1)

Indication

L
L+
M
M+
H

Fan speed

W7

(L + M) / 2

WA

(M + H) / 2

WD

Hi-POWER

W8

(L + M) / 2

WC

(M + H) / 2

WE

(Fig. 2)

Fan speed

M+(WC)

*3

*4

*5

L(W7)

Hi Power

H+(WD)

L+(W8)

*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

*6

(Linear appro ximation
from M+ and L)

*7

*6 : Fan speed = (H −L+) x 3/4 + L+

*8

*7 : Fan speed = (H −L+) x 2/4 + L+

*8 : Fan speed = (H −L+) x 1/4 + L+

(Linear appro ximation
from H and L+)

* Symbols

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

* The fan speed broadly varies due

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

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

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

(table 1) Indoor fan air flow rate <Cooling>

Fan speed

level

WF 530 498 560 528 650 624
WE UH 530 498 560 528 650 624
WD H 500 468 540 510 630 600
WC M+ 440 408 460 426 560 528
WB 440 408 460 426 560 528
WA M 380 342 390 354 500 468
W9 340 300 350 312 450 414
W8 L+ 340 300 350 312 450 414
W7 L 300 258 340 300 400 366
W6
W5 UL 260 216 270 228 340 300
W4 240 198 250 210 320 282
W3 SUL 240 198 240 198 300 258
W2 240 198 240 198 300 258
W1 240 198 240 198 300 258

Cool

L−

RAS-B10UFV-E

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

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

260 216 270 228 360 324

RAS-B13UFV-E RAS-B18UFV-E

–33 –

Item

Operation flow and applicable data, etc.

Description

2. Indoor fan
motor control

HEAT ON

Fan speed setup

AUTO

TC ≥ 42 C

NO

<In heating operation>

MANUAL

Indication

L
L+
M
M+
H

YES

Tc

52
51

(Fig. 3)

Fan speed Hi-POWER

W8

(L + M) / 2

WB

(M + H) / 2

WE

Min air flow rate control

Limited to Min WD tap

W9

(L + M) / 2

WD

(M + H) / 2

WF

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

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

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

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

42
41

* Fan speed =

(Fig. 4)

(TC – – W8) + W8

Basic fan control

TA-Tsc [°C]

b

TSC

c

- 0.5
d

- 1.0
e

- 1.5

f

- 2.0
g

- 2.5

- 5.0

- 5.5

*1: Fan speed = (M + −L+) x 1/5 + L+
*2: Fan speed = (M + −L+) x 2/5 + L+
*3: Fan speed = (M + −L+) x 3/5 + L+
*4: Fan speed = (M + −L+) x 4/5 + L+
(Calculated with linear approximation from M+ and L+)

*5: Fan speed = (H −M) x 1/5 + M
*6: Fan speed = (H −M) x 2/5 + M
*7: Fan speed = (H −M) x 3/5 + M
*8: Fan speed = (H −M) x 4/5 + M
(Calculated with linear approximation from H and M)

Fan speed

L+ (W9)

M+(WD)

*

No limit

Cold draft preventive control

Hi Power

M(W8)

*1

*2

*3

*4

*5

*6

*7

*8

H(WE)

46 46
45 45 33

33 33 21
32 32 20

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

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

* No limitation while fan speed MANUAL mode is in stability.
* A: When Tsc ≥ 24, A is 24, and when Tsc < 24, A is Tsc

Tsc: Set value

TC

34

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

(Fig. 6)

H (WE)

Line-approximate

M+and SUL with TC.

SUL (W2)

Stop

UAL in starting

(Fig. 5)

– 34 –

Item

Operation flow and applicable data, etc.

[In starting and in stability]

Description

In starting

FAN AUTO

FAN Manual

• Until 12 minutes passed after operation start

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

• Room temp. < Set temp. –4°C

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

• When 25 minutes or more passed after operation start

• Room temp. = Set temp. –3.5°C

(Table 2) Indoor fan air flow rate <Heating>

Fan speed

level

WF UH 560 528 600 570 690 666
WE H 540 510 580 552 670 642
WD M+ 500 468 520 486 600 570
WC 440 408 480 444 570 540
WB M 380 342 390 354 520 486
WA 380 342 390 354 460 426
W9 L+ 380 342 390 354 460 426
W8 L 300 258 350 312 400 366
W7 L- 260 216 340 300 360 324
W6 260 216 270 228 340 300
W5 UL 260 216 270 228 340 300
W4 260 216 270 228 340 300
W3 260 216 270 228 340 300
W2 SUL 240 198 250 210 320 282
W1 240 198 240 198 240 198

HEAT

RAS-B10UFV-E

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

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

RAS-B13UFV-E RAS-B18UFV-E

In stability

– 35 –

Item

Operation flow and applicable data, etc.

Description

3. Outdoor fan
motor control

(Remote controller)

Indoor unit controller

1) Outdoor unit
operation command
(Outdoor fan control)

2) Fan speed ≥ 400

when the motor stopped.

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

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

speed system is used. However, it is limited to 16 stages for
reasons of controlling.

Air conditioner ON

YES

OFF status of

fan motor continues.

NO

Fan motor ON

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

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

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

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

3) Fan lock

4) Motor operates as shown in the table below.

10SAV2-E, 13SAV2-E

Compressor speed (rps)

TO > 38°C
TO > 28°C

TO TO > 15°C

TO > 5.5°C
TO > 0°C
TO

< 0

During

ECO mode

When TO is abnormal

TO > 38°C
TO < 38°C

YES

Air conditioner

OFF

NO

In cooling operation

~ 13.8 ~ 31.7

MIN MAX MIN MAX MIN MAX

f 2 f 3 f C f D f E f F
f 2 f 3 f A f C f D f F
f 2 f 3 f 7 f A f 9 f C
f 1 f 3 f 2 f 5 f 4 f 7
f 1 f 1 f 1 f 2 f 2 f 4

°C f 0 f 0 f 0 f 1 f 1 f 2

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

32.3 ~ MAX

f D

Alarm

display

In heating operation

Compressor speed (rps)

TO > 15°C

TO

During

ECO mode

When TO is abnormal

TO < 15°C
TO < 5.5°C
TO < − 5.0°C
TO > 15°C
TO < 15°C
TO < 5.5°C
TO < − 5.5°C

~16.8 ~47.9

f 3 f 8 f 9
f 3 f 9 f A
f 8 f A f D
f B f C f D
f 3 f 3 f 6
f 3 f 3 f 8
f 5 f 9 f 9
f 7 f A f B
f A f B f D

48.5 ~ MAX

–36 –

Item

18SAV-E, 18SAV2-E

Operation flow and applicable data, etc.

Description

In cooling operation

Compressor speed (rps)

TO ≥ 38°C
TO ≥ 28°C

TO

During ECO,

QUIET and

comfort sleep

When TO is abnormal

Tap

TO ≥ 15°C
TO ≥ 5.5°C
TO ≥ 0°C
TO < 0°C f 0 f 1 f 0 f 3 f 1 f 4 ECO mode
TO ≥ 38°C
TO ≥ 28°C
TO ≥ 15°C
TO ≥ 5.5°C
TO ≥ 0°C
TO < 0°C f 0 f 1 f 0 f 3 f 1 f 4

10SAV2-E

MIN MAX MIN MAX MIN MAX

f 6 f 9 f 8 f B f A f E TO
f 5 f 9 f 7 f B f 9 f E
f 3f 7f 5f 9f 7f B
f 1f 3f 1f 7f 3f 9
f 1 f 3 f 1 f 5 f 3 f 7 During

f 6 f 9 f 8 f B f A f B
f 5 f 9 f 7 f B f 9 f B f D f D f D
f 3f 7f 5f 9f 7f B
f 1f 3f 1f 7f 3f 9
f 1f 3f 1f 5f 3f 7

f 1 f F f 1 f F f 1 f F

13SAV2-E

f 0 0 0 0
f 1
f 2
f 3
f 4
f 5
f 6
f 7

f 8

200 200 230
300 300 300
370 370 350
440 440 410
440 440 480
500 500 500
550 550 530

600 600 560

< 50.3< 22.1

Outdoor fan speed (rpm)

18SAV-E

18SAV2-E

0
230
300
350
410
480
500
530

560

50.3

In heating operation

≤

Compressor speed (rps)

When TO is abnormal

Tap

f 9
f A
f B
f C
f D
f E
f F

10SAV2-E

600 650
600 700
650 700
700 800
700 800
700 800
700 800

< 30.5 < 55.1

TO ≥ 10°C
TO ≥ 5.5°C
TO ≥ −5.0°
TO < −

5.0°C
TO ≥ 10°C
TO ≥ 5.5°C
TO ≥ −5.0°C

−5.0°C f 9 f A f B

TO <

13SAV2-E

f 6 f 8 f 9
f 9 f A f C

f A f B f D

f A f B f D

f 5 f 7 f 9
f 7 f 9 f B

f 9 f A f B

18SAV-E

640
700
700

800
800
800
800

55.1

18SAV2-E

640
700
700

900
900
900
900

≤

– 37 –

Item

Operation flow and applicable data, etc.

Description

4. Capacity
control

Remote controller Indoor unit

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

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

Set temp. (Ts)

Ts –TA

Correction of Hz signal

Detection of electromotive force

of compressor motor winding

Detection of motor speed and rotor position

Correction value of Hz signal ≤ Operating Hz

Inverter output change

Commutation timing change

Room temp. (TA)

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

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

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

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

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

* The contents of control

operation are same in cooling
operation and heating
operation

5. Current release
control

Outdoor unit inverter main

circuit control current

Operating current ≤

Setup value

Yes

Capacity control continues.

Outdoor temp.

45ºC

40ºC
16ºC
11ºC

Change of compressor speed

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

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

Outdoor temp. TO

Setup of current release point

No

44ºC

39ºC

Reduce compressor speed

Cooling current release value

10SAV2-E

3.97A

4.35A

6.30A

13SAV2-E

4.27A

4.88A

6.30A

18SAV-E

18SAV2-E

6.07A

7.12A

8.47A

Heating current release value

10SAV2-E

15.5ºC

10.5ºC

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

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

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

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

18SAV-E

18SAV2-E

8.77A

6.30A

6.30A

6.30A

13SAV2-E

6.30A

6.30A

6.30A

– 38 –

Item

Operation flow and applicable data, etc.

Description

6. Release protective
control by tempera­ture of indoor heat
exchanger

7 C

6 C

5 C

Indoor heat exchanger temperature

<In cooling/dry operation>

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

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

Usual cooling capacity control

R

When the value is
in Q zone, the

Q

compressor speed
is kept.

P

Reduction of compressor speed

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

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

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

55 C

52 C

48 C

Indoor heat exchanger temperature

<In heating operation>

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

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

Reduction of compressor speed

P

When the value is

Q

in Q zone, the
compressor speed
is kept.

R

Usual heating capacity control

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

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

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

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

– 39 –

Item

Operation flow and applicable data, etc.

Description

7. Defrost control
(Only in heating
operation)

18SAV-E 10SAV2-E
18SAV2-E

13SAV2-E

−3°C

−7°C

−26°C

Outdoor heat exchanger temperature

A zone

B zone

C zone

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

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

35'

Operation time
(Minute)

......18SAV-E

......18SAV2-E

......10SAV2-E

Start of heating operation

29'

0' 10' 15' 27' 40" 34'

13SAV2-E

−5°C

C zone

−5°C

A zone

−20°C

B zone

*

Te0 detection time

* The minimum value of Te sensor 10 to 15 minutes

after start of operation is stored in memory as Te0.

Table 1

When Te0 - TE = 2.5 continued for 2 minutes in A zone,
defrost operation starts.

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

When Te0 - TE = 3 continued for 2 minutes in C zone,
defrost operation starts.

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

<Defrost operation>

• Defrost operation in A to C zones

1) Stop operation of the compressor for
20 seconds.

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

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

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

<Finish of defrost operation>

• Returning conditions from defrost

operation to heating operation

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

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

3) Defrost operation continues for
15 minutes.

<Returning from defrost operation>

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

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

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

– 40 –

Item

Operation flow and applicable data,etc

Description

8. Air outlet
selection

< How to change air outlet selection >

1. Operate the air conditioner and select cooling or heating
mode.
(Air outlet selection can't be changed at standby mode.)

2. Push AIR OUTLET SELECT button on the unit operation
panel to change air outlet selection.

AIR OUTLET indication

Air outlet is contorolled as below.

AIR OUTLET SELECT button

1. Purpose

2. Description

• In Cooling operation, only lower-flow
can't be selected.

• In Dry mode operation,bi-flow and
lower-flow can't be selected.

• In heating operation and bi-flow
setting, the air outlet is set only upper
flow for preventing cold draft when
the indoor heat exchanger sensor
temperature (TC) is lower than 33
degrees.

• In cooling operation and bi-flow
setting, the air outlet is set only upper
flow for pravinting the room from
overcooling when the room
temperature (TA) is nearing the setup
temperature.
This function can be cancelled to

change setting.

< How to cancell to change upper-flow at Bi-flow setting in cooling >

1. Stop operation.

2. Push and hold AIR OUTLET SELECT button on the unit
operation panel over 10seconds (less than 20seconds).

AIR OUTLET SELECT button

3. After holding 10seconds, 4 beep sounds in heard and
TEMPERATURE indicator displays "1" for 5seconds.

Release AIR OUTLET SELECT button.

− 41 −

Item

Operation flow and applicable data,etc

Description

8. Air outlet
selection

9. Lower air

outlet louver
control

< How to set to change upper-flow at Bi-flow setting in

cooling

1. Stop operation.

2. Push and hold AIR OUTLET SELECT button on the unit
operation panel over 10seconds (less than 20seconds).

AIR OUTLET SELECT button

3. After holding 10seconds, 4 beep sounds in heard and
TEMPERATURE indicator displays "1" for 5seconds.

Release AIR OUTLET SELECT button.

< How to open or close the lower louver at standby mode >

1. Push AIR OUTLET SELECT button on the unit operation

panel.

AIR OUTLET SELECT button

1. Purpose

When someting is dropped to inside
of the unit from upper air outlet, this
function helps to remove something

from lower air outlet

2. When lower louver is closed, lower louver moves to open
position and TEMPERATURE indicator displays

"OP" (OPEN) during louver moving.

When lower louver is open, lower louver moves to open

plsition and TEMPERATURE indicator displays "CL"

(CLESE) during louver moving.

<Close->Open> <Open->Close>

TMPERATURE indicator

< Louver position in operation >
Lower louver is controlled in operation as below.

− 42 −

Item

Operation flow and applicable data,etc

Description

10. Upper air
outlet louver

control

Upper louver position can be arbitrarily set pu by pushing
[FIX] button of the remote control.

The position is controlled as below.

1. Description

· Upper louver position is stored in
memory by the microcomputer, and
the louver returns to the stored

position when the next operation is
performed. (Cooling/heating memory
position)

− 43 −

Item

Operation flow and applicable data, etc.

Description

11. ECO

operation

TA-Tsc

+6.0

+5.5

+5.0
+4.5
+4.0

+3.5
+3.0
+2.5

+2.0
+1.5
+1.0

+0.5

TSC

-0.5

-1.0

-1.5

-2.0

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

<Cooling operation>

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

1H 2H

Frequency

Zone

12
11
10

9

8
7
6

5

4

3
2
1

0

3H

4H

Time

Dry Max

*12
*11

*10
*

9

*8

MinHz

OFF

FAN

Fan speed depend on presetting and can change every speed.

Time

+1

ZONE

±0

-1

ZONE
min 1

<Cooling operation>

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

when ECONO has been received.

2) The indoor fan speed is depend
on presetting and can change
every speed after setting ECO

operation.

correction

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

4) The time correction is performed
every 8minutes.

0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–4.0
–5.0
–6.0
–7.0
–8.0

(Room temp. – Set temp.)

–9.0

–10.0
–11.0

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

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

Hz

Cool min 20

DRY max

<Heating operation>

30 minutes

A

B

C

B10UFV-E

35

B13UFV-E

20

37

→ Time Compressor

A

B

C

B18UFV-E

11
49

speed

0Hz

A zone

aHz

B zone

a to cHz

C zone

cHz

<Heating operation>

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

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

2) The indoor fan speed is depend

on presetting and can change
every speed after setting ECO

operation.

Hz

B10UFV-E

a20
c

50

B13UFV-E

20

50

– 44 –

B18UFV-E

15
68

Item

Operation flow and applicable data, etc.

Description

12. Test
operation

When keeping [OPERATION] button pressed for
10 seconds or more, the temporary [COOL] operation
is performed.

Filter lamp ON

Did you press [OPERATION] button

for 3 seconds or more?

Did you press [OPERATION] button

for 10 seconds or more?

Switch to [AUTO RESTART] control.

Press [OPERATION] button.

NO

YES

NO

13. Discharge temperature control

Td value

117°C
112°C
108°C
105°C

98°C

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

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

Operates with speed commanded by the serial signal.

YES

NO

YES

Control operation

Previous setting operation

Test [COOL] Operation

1) When pressing [OPERATION] button, the
previous setting operation starts.

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

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

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

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

1. Purpose

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

2. Operation

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

– 45 –

Item

Operation flow and applicable data, etc.

Description

14. Pulse
Modulating
value (P.M.V.)

control

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

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

Starting up

Initialize

Move to

initial position

*SH control

Compressor ON

Td

release control

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

In this time, “Click” sound may be
heard.

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

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

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

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

*PMV open degree control

Stop by

remote controller

Room temp. sensor

(Ta sensor) control

Power OFF

* SH (Super Heat amount) =

TS (Temperature of suction pipe of the compressor) –
TC or TE (Heat exchanger temperature at evaporation side)

* PMV: Pulse Modulating Valve

Defrost

– 46 –

Item

Operation flow and applicable data, etc.

Description

15. Self-Cleaning

function

Unit now performing cooling or dry operation

Press “STOP” button

Only timer indicator lights, and Self Cleaning operation starts

Time set now elapses

Operation stops

1. Purpose

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

Self-Cleaning operation

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

2. Operation

1) When the stop signal from the remote

controller or timer-off function is received,
only the timer indicator light.

2) The period of the Self-Cleaning operation

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

3) After the Self-Cleaning operation has

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

• During Self-Cleaning operations: The louver opens
slightly. The indoor fan operates continuously at
a speed of 240 rpm.

Self-Cleaning operation times

Self-Cleaning operation time

No Self-Cleaning operation
performed (0 minutes)

30 mins.

Cooling: Auto (cooling) Dry

Heating: Auto (heating)

Auto (fan only)

Shutdown

Operation time

Up to 10 minutes

10 minutes
or longer

No Self-Cleaning operation performed

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

second time without delay (within 10 minutes).)

– 47 –

Item

Operation flow and applicable data, etc.

Description

15. Self-Cleaning

• Self-Cleaning diagram

function

Operation display ON OFF OFF

FCU fan

Upper airoutlet OPEN OPEN (11º) CLOSE

Lower airoutlet

Timer display

Compressor

CDU fan ON or OFF

rpm is depend on presetting. (240RPM)

depend on airoutlet selection

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

depend on presetting per room temperature.

depend on presetting per room temperature.

Cool mode or dry mode

operation more than 10 mins.

ON ON

OPEN or CLOSE

ON or OFF

ON or OFF

Turn off by remote controller or

timer-off function.

OPEN or CLOSE

depend on airoutlet selection

ON

OFF OFF

OFF OFF

Self-Cleaning mode

operate 30 mins.

Automatically turn-off.

OPEN or CLOSE

depend on airoutlet selection

ON or OFF

OFF

Operation time

16. Self-Cleaning
function release

How to cencel Self-Cleaning function

To cancel the Self-Cleaning function, proceed as
follows:

 Press and hold [MODE] button on opreation

panel for more than 10 seconds.
(less than 20 seconds)

 After holding about 10 seconds, the air conditioner

beep 4 times without any blinking of display.

 After releasing [Mode] button, Self-Cleaning

function is cancelled.

How to set Self-Cleaning function

To set the Self-Cleaning function, proceed as
follows:

 Press and hold [MODE] button on opreation

panel for more than 10 seconds.
(less than 20 seconds)

 After holding about 10 seconds, the air conditioner

beep 4 times and OPERATION display blinks

5 seconds.

 After releasing [Mode] button, Self-Cleaning

function is set.

− 48 −

Item

Operation flow and applicable data, etc.

Description

17. Remote-A or B
selection

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

Remote Control B Setup.

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

2) Point the remote control at the indoor unit.

3) Push and hold CHK • button on the Remote

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

4) Press MODE • during pushing CHK • . "B" will

show on the display and "00" will disappear and
the air conditioner will turn OFF. The Remote

Control B is memorized.

Note : 1. Repeat above step to reset Remote Control

to be A.

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

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

1. Purpose

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

2. Description

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

3. Operation

The indoor unit on which the remote
controll selection has been set to B
receives the signal of the remote control
also set to B.
(At the factory the remote controller
selection is set to A on all the indoor
units. There is no A setting display.)

Indoor Unit B Setup.

1) Press and hold [Mode] button for more than
20 seconds.

2) After holding 20 seconds, the air conditioner

beep 5 times, without any blinking of display.

) After releasing [Mode] button, Indoor Unit B is set.

3

Note :

1. After holding 10 seconds, the air conditioner

beep 4 times, but continue to hold [ Mode] button.

2. Repeat above step to reset Indoor Unit A.
After holding 20 seconds, the airconditioner

beep 5 times and operation display blinks for

5 seconds.

− 49 −

Item

Operation flow and applicable data, etc.

Description

18. QUIET mode

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

speed L

−

until the [QUIET] button is pressed once

again (cancel Quiet mode).

19. COMFORT
SLEEP

Cooling mode

• The preset temperature will increase as

show on ECO operation (Item No. 9)

• Press the [COMFORT SLEEP] button to

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

• If the [COMFORT SLEEP] button is pressed

again means cancel comfort sleep mode.

Heating mode

• The preset temperature will drop down as

show on ECO operation (Item No. 9)

• Press the [COMFORT SLEEP] button to

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

• If the [COMFORT SLEEP] button is pressed

again means cancel comfort sleep mode.

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

Remarks :

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

2. Quiet mode is appropriate to work with less
cooling load and less heating load condition.
Because of the fan speed L- may cause not
enough the cooling capacity or heating
capacity.

The principles of comfort sleep mode are:

• Quietness for more comfortable. When

room temperature reach setting temperature

• Save energy by changing room temperature

automatically.

• The air condition can shut down by itself

automatically.

Remarks:

1.

Comfort sleep mode will not operate in dry

mode.

20. Short Timer

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

AUT O

AUTO

PRESET

ONE-TOUCH

QUIET

SWING

FLOOR

SLEEP

CHK

T

EM

FIX

Hi-POWER ECO

TIMER

ON

FILTER

FAN

P

MODE

COMFORT

SLEEP

CLR

OFF

SET

CLOCK

m

l

Purpose

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

Short Timer Setting

j

Press [ ] button to turn the unit OFF.

k Set the operation mode on the remote

control without sending the signal to

the unit.

l Use the tip of the pencil to push the

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

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

m

Press [ ] button to turn the unit ON.

n When short timer is activated, all

setting on the remote operates

immediately, besides, all indicatiors on

front panel turns ON continuously for

3 seconds.

− 50 −

Item

Operation flow and applicable data, etc.

Description

21. One-Touch
Comfort

22. Hi-POWER

Mode

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

Fan
Operation

0 12 25

AUTO/L L

*

Time after operation
starts (min)

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

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

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

([Hi-POWER] button on the remote controller

is pressed)

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

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

Operation condition for model to Europe
market

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

the indoor unit operates as following.

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

conditioner was OFF.

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

) Target temperature is 24ºC.

3
4

) Louver position is set as stored position

of the operating mode.

5) Fan is controlled as followings.

1. Automatic operation

• The indoor unit operates in according to the
current operation.

2. Cooling operation

• The preset temperature drops 1ºC
(The value of the preset temperature on the
remote controller does not change.)

The indoor unit's fan speed level increase 1 tap

3. Heating operation

• The preset temperature increases 2ºC
(The value of the preset temperature on the
remote controller does not change.)

The indoor unit's fan speed level increase 1 tap

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

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

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

How to Turn Off FILTER Indicator

Press [OPERATION] button on the indoor unit.

.

− 51 −

Item

Operation flow and applicable data,etc

Description

24. Set temp.
correction

Set temp. can be corrected by changing the set temp.
correnction value.
Initial setting of the set temp. correction value is 0.

Set temp. = Set temp. (TS)+ Set temp. correction
Set temp. (TS) : remote control or indoor unit display setting

Set temp. correction

Cooling

−5 ∼ +5°C

(Dry mode)

Heating

< How to change the set temp. correction >

1. Operate the air conditioner and select cooling or heating
mode.

(The set temp. correction can't be changed at standby
mode.)

2. Push and hold AIR OUTLET SELECT button on the unit
operation panel

−5 ∼ +5°C

AIR OUTLET SELECT button

1. Purpose
When the difference between the set
temperature of the remote control and
the room temperature is wide due to
the installation condition, etc, the set

temperature can be corrected.

2. Description
For example, when set temp. is 25°C

but room temp. is stable 27°C at cooling
mode, chage set temp. correction

(Cooling) from 0 to − 2°C

3. Push OPERATION button on the unit operation panel
10 times.

Set temp. correction value is displayed on the

TEMPERATURE indicator.

TEMPERATURE

4. Push TEMPERATURE button (UP or DOWN) to change
set temp. correction.

5. Release AIR OUTLET SELECT button.

Set temp. correction is memorized and set temp. value is

displayed on the TEMPERATURE indicator again.

OPERATION button

TEMPERATURE button

• Continue to push and hold AIR

OUTLET SELECT button.

• Continue to push and hold AIROUTLET

SELECT button.

− 52 −

Item

Operation flow and applicable data,etc

Description

25. Outdoor
Quiet control

(for only
1:1 outdoor
unit)

As shown in the table, the max. revolution number of
compressor can be reduced.
As the max. number of revolution of compressor is restricted.

the rise-up performance at the start time is weakened.

This function is disable with multi-outdoor unit connecting.

(rps)

53
73

RAS-B13UFV-E
Normal

(rps)

94
99

Normal

(rps)

77
76

RAS-B18UFV-E

Normal

(rps)

85
85

Normal

(rps)

72
72

MODE

Cooling
Heating

RAS-B10UFV-E
Normal

Normal

(rps)

62

86

When air conditioner is on standby before setting.

< How to set Outdoor Quiet control >

1. Push and hold OPERATION button for 20seconds.
OPERATION button

2. After holding 20seconds, beep sounds is heard and
OPERATION indicator flashes for 5seconds.
Release OPERATION button.

OPERATION indicator

1. Purpose
For the users who concern about

noise of the outdoor unit, this control
controls the max. revolution number
of the compressor to reduce the

noise.

2. Description

• It can be change setting whether air

conditioner is operationg or not.

• After pushing OPERATION button, air

conditioner starts operation.

• After 3seconds, 3 beeps are heard.

(Auto restart setting is changed.)

• After 10seconds, a beep is heard.

(Temporary operation starts and Auto
restart function is cancelled.)

3. Push OPERATION button to stop temporary operation.
(Set Auto restart function again)

< How to cancel Outdoor Quiet control >

1. Push and hold OPERATION button for 20seconds.

OPERATION button

2. After holding 20seconds, beep sounds is heard.
(OPERATION indicator doesn't flash).
Release OPERATION button.

3. Push OPERATION button to stop temporary operation.
(Set Auto restart function again)

• After pushing OPERATION button, air

conditioner starts operation.

• After 3seconds, 3 beeps are heard.
(Auto restart setting is changed.)

• After 10seconds, a beep is heard.
(Temporary operation starts and Auto
restart function is cancelled.)

− 53 −

Item

Operation flow and applicable data,etc

Description

25. Outdoor
Quiet control

(for only
1:1 outdoor
unit)

When air conditioner is in operation before setting.

< How to set Outdoor Quiet control >

1. Push and hold OPERATION button for 20seconds.
OPERATION button

2. After holding 20seconds, beep sounds is heard and
OPERATION indicator flashes for 5seconds.
Release OPERATION button.

OPERATION indicator

• After pushing OPERATION button, air
conditioner stops operation.

• After 3seconds, 3 beeps are heard.
(Auto restart setting is changed.)

< How to cancel Outdoor Quiet control >

1. Push and hold OPERATION button for 20seconds.

OPERATION button

2. After holding 20seconds, beep sounds is heard.
(OPERATION indicator doesn't flash).
Release OPERATION button.

• After pushing OPERATION button, air

conditioner starts operation.

• After 3seconds, 3 beeps are heard.
(Auto restart setting is changed.)

− 54 −

9-3. Auto Restart Function

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

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

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

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

• When the unit is standby (Not operating)

Operation

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

• When the unit is in operation

Operation

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

Motions

The unit is on standby.

.

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

. After approx. three seconds,

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

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

Motions

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

.

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

. After approx. three seconds,

The unit beeps three times. The operation indicator flashes

for 5 seconds.

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

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

– 55 –

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

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

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

Operation

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

• When the system is operating

Operation

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

Motions

The unit is on standby.

.

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

. After approx. three seconds,

The unit beeps three times and continues to operate.
If the unit is not required to operate at this time, press [OPERATION]

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

Motions

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

.

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

The unit beeps three times.
If the unit is required to operate at this time, press [OPERATION] button

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

9-3-3. Power Failure During Timer Operation

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

NOTE :

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

. After approx. three seconds,

– 56 –

9-4. Remote control

9-4-1. Remote control and its functions

11

1

Infrared signal emitter

11

2

Start/Stop button

3

Mode select button (MODE)

4

Temperature button (TEMP)

5

Fan speed button (FAN)

6

Swing louver button (SWING)

7

Set louver button (FIX)

8

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

9

18

10

Sleep timer button (SLEEP)

19

Setup button (SET)

11
12

20

Clear button (CLR)

13

Memory and Preset button (PRESET)

14

One Touch button (ONE-TOUCH)

15

High power button (Hi-POWER)

16

Economy button (ECO)

17

Quiet button (QUIET)

18

Comfort sleep button (COMFORT SLEEP)

19

19

Filter reset button (FILTER)

20

Clock Reset button (CLOCK)

21

Check button (CHK)

22

Floor warming mode button (FLOOR)

9-4-2. Operation of remote control

1. ONE-TOUCH

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

Press ONE-TOUCH : Start the operaton.

2. AUTOMATIC OPERATION

To automatically select cooling, heating operation.

1. Press MODE : Select A.

2. Press MODE : Select A.

3. COOLING / HEATING OPERATION

1. Press MODE : Select Cool or Heat .

2. Press MODE : Set the desired temperature.
Cooling: Min. 17°C, Heating : Max. 30°C.

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

− 57 −

4. DRY OPERATION (COOLING ONLY)

For dehumidification, a moderate cooling performance is controlled automatically.

1. Press MODE : Select Dry .

2. Press MODE : Set the desired temperature.

5. Hi-POWER OPERATION

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

Press HI-POWER : Start and stop the operation.

6. FLOOR WARMING OPERATION

Heating will operate with downward blowing only.
Temperature of air outlet will be higher than usual.

7. ECO OPERATION

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

Press ECO : Start and stop the operation.

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

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

8. TEMPORARY OPERATION

In case of the misplaced or discharged remote control

• Pressing the RESET button, the unit can start or stop
without using the remote control.

• Operation mode is set on AUTOMATIC
operation, preset temperature is 24°C
and fan operation is automatic speed.

9. TIMER OPERATION

Setting the ON Timer Setting the OFF Timer

1

Press ON : Set the desired ON timer.

Press

2

3

3

Press

SET

: Set the timer. Press

CLR

: Cancel the timer. Press : Cancel the timer.

Press

OFF

: Set the desired OFF timer.

SET

: Set the timer.

CLR

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

Setting Everyday Timer

1

Press

2

Press

ON

: Set the ON timer.

OFF

: Set the OFF timer.

3

Press

Press

4

mark flashing.

SET

.

SET

button during the ( or )

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

( or )

Note:

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

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

– 58 –

10. PRESET OPERATION

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

1. Select your preferred operation.

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

3. Press PRESET : Operate the preset operation.

11. AUTO RESTART OPERATION

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

Setting

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

• Do not operate ON timer and OFF timer.

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

12. QUIET OPERATION

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

Press QUIET : Start and stop the operation.

P

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

cooling or heating due to low sound features.

13. COMFORT SLEEP OPERATION

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

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

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

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

14. SLEEP TIMER OPERATION

To start the sleep timer (OFF timer) operation

Press SLEEP : Select 1, 3, 5 or 9 hrs for OFF timer operation.
Press CLR to cancel the sleep timer operation.

15. FILTER RESET

Firstly, turn off the circuit breaker.

FILTER lamp lights on; the filter must be cleaned.

To turn off the lamp, push OPERATION button on the indoor unit or the FILTER.
button on the remote control.

Note: The filter indicator turns on after turns on after about 1000 hours.

Indoor Unit and Remote Control

• Clean the indoor unit and the remote control with a wet cloth when needed.

• No benzine, thinner, polishing powder or chemically-treated duster.

− 59 −

16. SELF CLEANING OPERATION (COOL AND DRY OPERATION ONLY)
Cleaning operation

This function is used to dry the inside of the air conditioner to reduce te growth of

mold, etc. indide the air conditioner.

• When the unit shuts down after having operated for 10 or more minutes in
the cooling or dry mode, the cleaning operation is started automatically, and
the TIMER indicator on the nuit's display panel turns on.

Cleaning operation duration

• The cleaning operation lasts for 30 minutes if the unit has been operating in
the cooling or dry mode for 10 minutes or more.

Note:

• SELF CLEANING operation is default setting from factory.

• How to cancel SELF CLEANING operation.

Press and hold MODE button on operation panel for more than 10 seconds
(less than 20 seconds). When canceling, 4 beeps sound.

• How to activate SELE CLEANING operation.
Press and hold MODE button on operation panel for more than 10 seconds
(less than 20 seconds). Then, 4 beeps will sound and operation lamp will
blink for 5 seconds.

17. OPERATION AND PERFORMANCE

1. Three-minute protection feature: To prevent the unit from being activated for
3 minutes when suddenly restarted or switched to ON.

2. Preheating operation: Warm up the unit for 5 minutes before blowing warm air.

3. Warm air control: When the room temperature reaches the set temperature,
the fan speed is automatically reduced and the outdoor unit will stop.

4. Automatic defrosting: Fans will stop during defrost operation.

5. Heating capacity: heat is absorbed from outdoor and released into the room.

When the outdoor temperature is too low, use another recommended heating
apparatus in combination with the air conditioner.

6. Consideration for accumulated snow: Select the position for outdoor unit when it
will not be subjected to snow drifts, accumulation of leaves or other seasonal debris.

7. Some minor cracking sound may occur when unit operating. This is normal because
the cracking sound may be caused by expansion/contraction of plastic.

Temp.

Operation

Heating
Cooling

Dry

∗ Concerning multiple connections, please inquire to the dealership or refer to the catalog.

Outdoor Temperature

RAS-10, 13,18SAV Series

-15°C ~ 24°C

-10°C ~ 46°C

-10°C ~ 46°C

Room Temperature

Less than 28°C

21°C ~ 32°C
21°C ~ 32°C

− 60 −

18. TROUBLESHOOTING (CHECK POINT)

The unit does not operate. Cooling or Heating is abnormally low

• The power main switch is turned off.

• The circuit breader is activated to cut

off the power supply.

• Stoppage of electric current.

• ON timer is set.

Note: When there is an abnormality in the product, abnormal code (2 digits) will be

displayed on the unit display panel. Please contact the dealership.

In case of multiple connection

• Check whether the operation mode is different from what has been selected
for the units in the other rooms (The following combinations of operations
cannot be performed: COOL and HEAT, DRY and HEAT).

• Select the same operation mode as for the other rooms.

19. REMOTE CONTROL A-B SELECTION

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

Remote Control B Setup.

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

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

• The filters are blocked with dust.

• The temperature has been set improperly.

• The windows or doors are opened.

• The air inlet or outlet of the outdoor unit

is blocked.

• The fan speed is too low.

• The operation mode is DRY.

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

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

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

Unit B setup.

Press and hold MODE button for more than 20 seconds.
When A setup changed to B setup : 5 beeps will sound and operation lamp

blinks for 5 seconds.
When B setup changed to A setup : 5 beeps will sound.

20. ADJUSTING BRIGHTNESS OF UNIT DISPLAY PANEL

1. Press and hold AIR OUTLET SELECT button then press MODE button for 3 times
(All lamp of the unit display panel will be switched on).

(At that time, please press and hold the AIR OUTLET SELECT button)

2. Press and hold AIR OUTLET SELECT button on Unit display panel, then press

TEMPERATION button (Up), (Down) for select the desired brightness.

3. Brightness will be settled when AIR OUTLET SELECT button is released.

Although the temperature indicator is switched off, if press the temperature
button (up) and (down), the set temperature will be indicated, and then can

adjust the temperature.
10 seconds after stopped pressing the button, the temperature indication will
be switched off.

− 61 −

4 stages of brightness can be changed.

Temperature indicator Other lamp

1

2
3
4

21. CHANGE AIR OUTLET GRILLE ON STABLE TIME (COOLING ONLY)

On cooling operation, whichever air outlet is set, only Upper is used when the room temperature
approaches the ser temperature.
In case to keep pu/down blowing, operate as below;
Press and hold AIR OUTLET SELECT button for more than 10 seconds (less than 20 seconds)

(4 beeps will sound then "1" indication at TEMPERATURE indicator will light up for 5 seconds).
For return to the former status, press and hold AIR OUTLET SELECT button for more than

4 seconds once again (In this time, 4 beeps will sound then "0" indication at TEMPERATURE
indicator will blinks for 5 seconds).

22. AIR INLET GRILLE MANTENANCE
Wash the air inlet grille with water using the soft sponge or towel.

• Dry it well in a shadow area after washing.

• Scour heavy dirt with neutral detergent for kitchen, and rinse it with the water

(Do not use the wire wool).

• Do not press the front panel strongly. It may be cracked.

Usual

Darkness

Turn off

Turn off

Usual

Darkness
Darkness

Turn off

− 62 −

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

[Display]

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

1

Transmission mark

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

2

Mode indicator

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

: Cool, : Dry, : Heat)

3

Temperature indicator

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

4

FAN speed indicator

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

(

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

either AUTO or

: Dr y.

indicates when the

5

TIMER and clock time indicator

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

The current time is always indicated except
during TIMER operation.

6

Hi-POWER indicator

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

again to stop the operation.

7

(PRESET) indicator

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

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

Press another button to turn off the mark.

8

ECO indicator

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

to stop operation.

mark is shown when holding down the

11

10

6

1

9

12

3

8

7

2

13

4

5

9

A, B change indicator remote controller

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

10 Comfort sleep

Indicates when comfort sleep is activaled.
Press comfort sleep bu

tton to selectter

11 Quiet

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

12 One-Touch

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

13 Swing

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

– 63 –

9-5. Indoor Unit Display & Unit Operation Panel

This indoor unit can be operated with the unit operation panel or using remote control.
Operational contents will be followed the one which was operated later.
If change the set temperature with operation panel of unit, temperature indication will be changed,
but the temperature display on the remote control will not change.

If set the air flow only with the upper port, a little air flow may happen at the lower port.

6

7

9

8

2

1

4

14

15

13

12

11

10

11

OPERATION button : Unit operation ON/OFF button, turn off FILTER CHECK indicator.

1

11

2

MODE button : Operation mode (Auto→Cooling→Heating→Aoto→ • • • )

3

5

Remote control
light receiver

∗ CHILD LOCK function : Press MODE button for 3 seconds. (It is possible to operate even when stopping.)

To cancel CHILD LOCK function, press MODE button for 3 seconds once again.
When CHILD LOCK function is activated, 3 beeps will sound.

When press MODE button to cancel the function, a beep will sound and then 3 seconds later 3 beep
sound may occur.

The indicator button will be invalid while the child lock function is activated.
(When press the button, 1 beep will sound).
Operation with remote control during the CHILD LOCK function works.
This function is cancelled when the power supply is off or failure.

3

AIR OUTLET SELECT button : Cooling, Auto (Upper & Lower→ Upper→ Upper & Lower→• • • )

Dry (upper only)

Heating (Upper & Lower→ Upper→ Upper & Lower→• • • )

On cooling operation, whichever air outlet is set, only Upper is used when the room temperature
approaches the set temperature.
During stop operation : Open/Close the lower air outlet grille.
When the TEMPERATURE indicator display "CL" the lower air outlet grille will be in closed status.
When the TEMPERATURE indicator display "OP" the lower air outlet grille will be in open status.

4

TEMPERATURE button (Up) : Setting temperature increase by 1°C

5

TEMPERATURE button (Down) : Setting temperature decrease by 1°C

6

COOL and DRY indicator (Blue)

7

HEAT indicator (Orange)

8

AUTO indicator (Green)

9

OPERATION indicator (Green)

10

HI-POWER indicator (Green)

11

FLOOR indicator (Orange)

12

TIMER indicator (Yellow)

13

FILTER CHECK indicator (Red)

14

TEMPERATURE indicator (Blue)

15

AIR OUTLET indicator (Green)

(17°C→18°C • • • 30°C )

(30°C→ 29°C • • • 17°C )

– 64 –

10. INSTALLATION PROCEDURE

10-1. Installation Diagram of Indoor and Outdoor Units

Air filter

Installation plate

1

Do not allow the drain hose to get
slack.

5

Filter

5

Filter

3

Batteries

2

Wireless remote control

6

Mounting screw

8

Insulation sheet

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

igure on the right.

f

Remark :

• Detail of accessory and installation
parts can see in the accessory sheet.

CAUTION

Install in rooms that are 13 m3 or larger.
If a leak of refrigerator gas occurs
inside the room, an oxygen deficiency
can occur.

50 mm or more

7

Pan head

wood screw

1

0

0

(C)

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

m

m

o

r

m

o

r

e

r

o

m

m

0

0

6

(B)

4

Remote control holder

e

r

o

m

70 mm or more

Vinyl tape
Apply after carrying
out a drainage test.

(D)

m

m

0

0

1

r

o

m

r

o

50 mm or more

Shield pipe

e

Extension
drain hose
(Not available,
provided by installer)

6

0

0

m

m

o

r

(A)

Saddle

m

o

r

e

Cut the piping
hole sloped
slightly.

Make sure to run the drain hose
sloped downward.

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

Right

Rear right

Bottom right

Insulate the refrigerant pipes
separately with insulation, not together.

Rear left

Left

Bottom left

8 mm thick heat resisting
polyethylene foam

In case of right or left piping

cut dot-line area

Before installing the wireless remote controller

• Loading Batteries

1. Remove the battery cover.

2. Insert 2 new batteries (AAA type)
following the (+) and (–) positions.

2 Wireless remote controller

A

C

L

– 65 –

3 Batteries

10-2. Optional Parts, Accessories and Tools

10-2-1. Optional Installation Parts

Part

Code Q'ty

Refrigerant piping
Liquid side : ∅6.35 mm

A

Gas side : ∅9.52 mm

Parts name

One

each

(RAS-(B) 10,13UFV Series)

12.70 mm∅

(RAS-(B) 18UFV Series)

Pipe insulating material

B

(polyethylene foam, 8 mm thick)

C

Putty, PVC tapes

1

One

each

<Fixing bolt arrangement of outdoor unit>

·

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

·

·

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

125 mm108 mm

28 mm

25 mm

Æ

Air inlet

* Drain nipple and cap

water proof are packed

320 mm

86 mm

102 mm

in outdoor unit.

Air outlet

600 mm

90 mm

Drain outlet

Fig. 10-2-1

When using a multi-system outdoor unit is used, refer to the installation manual provided with
the model concerned.

– 66 –

10-2-2. Accessory and installation parts

Part

No.

Part name (Q’ty)

1

Installation plate x 1

2

Wireless remote control x 1

3

Battery x 2

Others

Owner’s manual

Installation manual

SLEEP

CHK

ON

FILTER

OFF

CLOCK

SET

FLOOR

SWING

QUIET

FIX

TIMER

Hi-POWERECO

COMFORT

SLEEP

CLR

Name

Part

No.

4

Part name (Q’ty)

Part

No.

7

Part name (Q’ty)

Flat head wood screw

∅

Remote control holder x 1

ONE-TOUCH

PRESET

AUTO

T
E
MP

MODE

FAN

AUTO

5

8

Filter (RB-A620DE) x 2

6

Mounting screw ∅ 4 x 25 l x 8

3.1 x 16 l x 2

Insulation sheet x 1

9

Drain nipple* x 1

10

Cap water proof x 2

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

– 67 –

10-2-3. Installation/Servicing Tools

Changes in the product and components

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

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

New tools for R410A

New tools for R410A

Gauge manifold

Charge hose

Electronic balance
for refrigerant charging

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

Flare tool (clutch type)

Gauge for projection
adjustment

Vacuum pump adapter

Applicable to R22 model

×

×

¡

×

¡

——

¡

Changes

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

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

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

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

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

Used when flare is made by using conventional flare tool.

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

Gas leakage detector

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

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

×

Exclusive for HFC refrigerant.

– 68 –

10-3. Indoor Unit

10-3-1. Installation Place

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

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

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

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

CAUTIONCAUTION

• Direct sunlight to the indoor unit's wireless receiver should be avoided.

• The microprocessor in the indoor unit should not be too close to RF

noise sources.

(For details, see the owner's manual)

Remote control

• A place where there are no obstacles such as a curtain that may block the
signal from the remote control.

• Do not install the remote control in a place exposed to direct sunlight or
close to a heating source such as a stove.

• Keep the remote control at least 1 m apart from the nearest TV set or
stereo equipment (This is necessary to prevent image disturbances or
noise interference).

• The location of the remote control should be determined as shown below.

(Side view) (Top view)

7 m

7 m

0
9

Remote

Indoor unit

60

Reception range

control

R

e

c

e

p

t

i

o

n

r

a

n

ge

* : Axial distance

7 m

45

45

Remote control

10-3-2. Cutting a Hole and Mounting

Installation Plate

Cutting a hole

(Side piping)(Rear piping)

60100

45

Mounting the installation plate and screw position

272

Floor

560

(Unit : mm)

590

Wall

(7

00)

150

230

(600)

15

)

5

(20

15

670

15

0

9

15

When the installation plate is directly mounted
on the wall

1. Securely fil t the installation plate onto the wall by screwing it in the upper
and lower parts to hook up the indoor unit.

2. To mount the installation plate on a concrete wall with anchor bolts, use
the anchor bolt holes as illustrated in the below fi gure.

3. Install the installation plate horizontally in the wall.

Installation plate
(Keep horizontal direction)

Anchor bolt

Projection

5 mm hole

Clip anchor
(local parts)

Mounting screw

6

∅4 mm x 25 l

15 mm or less

CAUTION

Failure to fi rmly install the unit may result in personal injury and property
damage if the unit falls.

• In case of block, brick, concrete or similar type walls, make ∅5 mm holes

in the wall.

• Insert clip anchors for appropriate mounting screws 6 .

45

(Bottom piping)

60

100 70

45

100

45

: Pipe hole (65 mm)

1. After determining the pipe hole position, drill the pipe hole (∅65 mm) at a
slight downward slant to the outdoor side.

NOTE

• When drilling a wall that contains a metal lath, wire lath or metal plate, be

sure to use a pipe hole brim ring sold separately.

– 69 –

10-3-3. How to Install Indoor Unit

1. Remove the air inlet grille. Open the air inlet grille and remove the strap.

2. Remove the front panel (Remove the 4 screws).

Front panel

Hook

Air inlet grille

Layout of connection piping

100

6 6

85

49

108

542 58

29

64

40

120

R45

4085

112

148

2. Put water in the drain pan and make sure that the water is drained out of
doors.

3. When connecting extension drain hose, insulate the connecting part of
extension drain hose with shield pipe.

Shield pipe

Extension drain hose

Drain hose

Inside the room

CAUTION

Arrange the drain pipe for proper drainage from the unit.
Improper drainage can result in dew-dropping.

Wiring connection

Wiring of the connection cable is necessary to remove the front panel.

1. Remove the terminal cover and cord clamp.

2. Insert the connecting cable (according to the local rule) into the pipe hole
on the wall.

3. Take out the connecting cable through the cable slot on the rear panel so
that it protrudes about 50 cm from the front.

4. Insert the connecting cable fully into the terminal block and secure it
tightly with screws.

5. Tightening torque : 1.2 N·m (0.12 kgf·m)

6. Secure the connecting cable with the cord clamp.

7. Fix the terminal cover, install the front panel and grille inlet.

CAUTION

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

panel.

• Check local electrical cords and also any specifi c wiring instructions or

limitations.

Connection piping

210

163

47

49

Treatment of piping connection

1) Check the fl are nut connections for the gas leak with a gas leak detector
or soap water.

2) To prevent gap in slit, fasten top and bottom with tape.

3) Slit is covered with tape.

4) Fasten with supplied Insulate sheet to prevent gap on the top of slit.

Gas leak check

Tape

Slit

Tape

8 Insulation sheet

Drainage

1. Run the drain hose sloped downwards.

NOTE

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

Do not form the
Do not rise the
drain hose.

drain hose into

a wavy shape.

Hook

Terminal
block

Terminal cover

Screw

Screw

Cord clamp

Earth screw

110 mm

20 mm

430 mm

10 mm

50 mm

Stripping length of the connecting cable

Earth line

Earth line

Do not put the
drain hose end
into water.

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

– 70 –

NOTE

• Use stranded wire only.

• Wire type : H07RN-F or 60245 IEC66 (1.0 mm2 or more)

2

Mounting directly on the floor

1) Fix the leg of indoor unit on the fl oor with 2 mounting screws.

2) Fix the upper part of indoor unit on the wall with 4 mounting screws.

(Floor installation)

Slit

6 screw
(M4 x 25L)

NOTE

• In case the plinth is fi xed to the wall, please make sure to cut out the slit
on the left and right side of the main part.

For prevent dewfall

Wall burying mode

2. Wall hole size
Wall hole size should be enough to keep the distance with indoor unit as

shown in the following fi gure.

(Front view)

70 or more

800 or more

(Side view)(Unit : mm)

240 to 250

Cut dot-line area

Installation on the wall

1) Fix the installation plate on the wall with 4 mounting screws.

2) Hook the indoor unit on the installation plate.

3) Fix the upper part of indoor unit on the wall with 4 mounting screws.

(Wall installation)

4 screw
(M4 x 25L)

4 screw
(M4 x 25L)

1

5

40

0

1

5

288

23

0

6

7

0

CAUTION

Make sure to fi x it at a designated position with the screws.
Failure may result the damage of piping by the turning over of a set.

Wall

(700)

(600)

Floor

50 or more Indoor unit 50 or more

670 or more

0 to 30

Floor

Wall

3. Installation using the supporting plate

• To install into the existing wall hole, if it is impossible to keep 20-30 mm
of depth, use the supporting plate for securing the distance.

• Arrange the screw positions and supporting plate as shown in the
fi gure.

• Be sure to switch to wall burying mode.

(Rear screws potion)

10

1

5

670

1000 mm or less

: Screw holes

(Field supply)

560

272

(Side view)

(Field supply)

240 340

(Unit : mm)

4. In case of lattice establishment

• Follow the following fi gure, make sure to keep enough distance
between lattice, frame and wall.

• Be sure to switch to wall burying mode.

• The lattice should be make of wood.

• Between the air inlet and outlet, should be devided with partition board.

• Be sure to establish the open part for RECEIVER.

• The open part of lattice must be opens 70 % or more of the wall hole.

• The open part of lattice must be arranged uniformly.

(Top view)

(Unit : mm)

10-3-4. Concealed Installation

The special method to install the indoor unit bury in the wall is shown here.
Please make sure to change to wall burying mode.

1. To switch to the wall burying mode
To switch to the wall burying mode, press and hold AIR OUTLET

Partition board

SELECT button for 20 seconds.

- When the operation set up and 5 beep sounds. Then indication at
Temperature indicator will light up for 5 seconds.

- To cancel, press AIR OUTLET SELECT button for 20 seconds then, 5
beep sounds. Then indication at Temperature indicator will blinks for 5
seconds.

- To prevent dewfall, above plate angle should be narrow.

– 71 –

(Front view)

800 or more

70 or more

(Side view)

Opening for receiver

Opening for receiver

20 to 30

Partition board

670 or more

50 or more 50 or more

10-4. OUTDOOR UNIT

• When using a multi-system outdoor unit refer to the installation manual
provided with the model concerned.

10-4-1. Installation Place

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

• A place which can bear the weight of the outdoor unit and does not allow
an increase in noise level and vibration.

• A place where the operation noise and discharged air do not disturb your
neighbors.

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

• A place free of a leakage of combustible gases.

• A place which does not block a passage.

• When the outdoor unit is to be installed in an elevated position, be sure to

secure its feet.

• This air conditioner accepts a connection piping length from 2 m to 20 m.

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

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

• An allowable height level is up to 10 m.

• A place where the drain water does not cause any problems.

10-4-2. Precautions about Installation in Regions

with Snowfall and Cold Temperatures

• Do not use the supplied drain nipple for draining water. Drain the water from
all the drain holes directly.

• To protect the outdoor unit from snow accum ulation, install a holding frame,
and attach a snow protection hood and plate.

* Do not use a double-stack ed design.

Snow protection plate

Front

Anchor bolts

Snow protection hood

At least 50 cm

Snow accumulation line
Holding frame

CAUTION

1. Install the outdoor unit in a location where there are no obstructions
near its air intake or air outlet.

2. When the outdoor unit is installed in a place that is always exposed to
strong winds like on the coast or on a high story of a building, secure
the normal fan operation using a duct or a wind shield.

3. Especially in windy areas, install the unit to prevent the admission of
wind.

4. Installation in the following places may result in trouble.

Do not install the unit in such places.

• A place full of machine oil.

• A saline-place such as the coast.

• A place full of sulfi de gas.

• A place where high-frequency
waves are likely to be generated,

such as from audio equipment, welders, and medical equipment.

Install at least 50 cm
above the snow
accumulation line.

Strong

wind

500 140

Partition board

10-4-3. Draining off the Water from the Outdoor Unit

• If it is necessary to drain off the water from the outdoor unit, install two
water-proofl ng rubber caps and a drain nipple.

Water-proof rubber caps
(supplied with the outdoor unit)

Base plate

Drain nipple

10-4-4. Refrigerant Piping Connection

Flaring

1. Cut the pipe with a pipe cutter.

2. Deburr the inside of the pipe at its end.

Take steps to ensure that the removed burrs will not enter the pipe.

3. Remove the fl are nuts provided with the indoor and outdoor units, and

insert them into the pipe.

4. Flare the pipe.

The projection margin of the pipe must be checked.

5. Check that the ß are has the appropriate shape.

90

A

Die

Pipe A B Flare Nut

Outside

diameter

mm mm mm mm mm mm N·m kgf·m

6.35 0.8 0 to 0.5 1.5 to 2.0 9.1 17 14 to 18 1.4 to 1.8

9.52 0.8 0 to 0.5 1.5 to 2.0 13.2 22 33 to 42 3.3 to 4.2

12.7 0.8 0 to 0.5 2.0 to 2.5 16.6 26 50 to 62 5.0 to 6.2

Thickness

Pipe

(clutch type)

R410A tool

Rigid

Obliquity Roughness W arp

BC

Imperial

(wing nut

type)

R410A tool

C Tighten torque

– 72 –

• Tightening torque for connection of flare pipe -

4 mm

The pressure of R410A is higher than R22

(Approx. 1.6 times). Therefore securely
tighten the fl are pipes which connect the
outdoor unit and the indoor unit with the
speciÞ ed tightening torque using a torque
wrench. If any fl are pipe is incorrectly

Flare at
indoor unit side

connected, it may cause not only
a gas leakage but also trouble in the
refrigeration cycle.

Flare at
outdoor unit side

10-4-5. Evacuating

After the piping has been connected to the indoor unit, you can perform
vacuuming together at once.

VACUUMING
Evacuate the air in the connecting pipes and in the indoor unit using a
vacuum pump. Do not use the refrigerant in the outdoor unit. For details,
see the manual of the vacuum pump.

Using a vacuum pump

Be sure to use a vacuum pump with counter-fl ow prevention function so
that inside oil of the pump does not fl ow backward into pipes of the air
conditioner when the pump stops.
(If oil inside of the vacuum pump enters the air conditioner, which use
R410A, refrigeration cycle trouble may happen.)

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

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

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

4. Operate the vacuum pump to start evacuating. Perform evacuating for
about 15 minutes if the piping length is 20 meters
meters) (assuming a pump capacity of 27 liters per minute). Then conÞ rm
that the compound pressure gauge reading is -101 kPa (-76 cmHg).

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

6. Open fully the valve stem of the packed valves (both gas and liquid
sides).

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

Compound pressure gauge

Pressure gauge

(15 minutes for 20

Gas side
(∅12.70 mm)

Gas side
(∅9.52 mm)

Liquid side
(∅6.35 mm)

Service port

50 to 62 N·m
(5.0 to 6.2 kgf·m)

33 to 42 N·m
(3.3 to 4.2 kgf·m)

14 to 18 N·m
(1.4 to 1.8 kgf·m)

14 to 18 N·m
(1.4 to 1.8 kgf·m)

Hexagon wrench
is required.

10-4-6. Wiring Connection

1. Remove the valve cover, the electric parts cover and the cord clamp from
the outdoor unit.

2. Connect the connecting cable to the terminal as identifi ed by the matching
numbers on the terminal block of indoor and outdoor unit.

3. Insert the power cord and the connecting cable fully into the terminal
block and secure it tightly with screws.

4. Use vinyl tape, etc. to insulate the cords which are not going to be used.

Locate them so that they do not touch any electrical or metal parts.

5. Secure the power cord and the connecting cable with the cord clamp.

6. Attach the electric parts cover and the valve cover on the outdoor unit.

10-4-7. Electrical Work

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

2. Prepare the power source for exclusive use with the air conditioner.

Model

Power source

Maximum running
current

Plug socket & fuse
rating

RAS-(B)10UFV

series

220-240V ~ 50Hz
220-230V ~ 60Hz

8.5A 11.0A 12.0A

Power cord H07RN-F or 60245 IEC66 (1.5 mm
Connecting cable H07RN-F or 60245 IEC66 (1.0 mm2 or more)

∗ When using a multi-system outdoor unit is used, refer to the installation

manual provided with the model concerned.

RAS-(B)13UFV

series

220-240V ~ 50Hz
220-230V ~ 60Hz

16A

RAS-(B)18UFV

series

220-240V ~ 50Hz
220-230V ~ 60Hz

2

or more)

EN

Ð101 kPa (-76 cmHg)

Handle Lo

Charge hose
(For R410A only)

Connecting pipe

Service port (Valve core (Setting pin))

Packed valve at liquid side

Packed valve at gas side

Manifold valve

Handle Hi
(Keep full closed)

Charge hose
(For R410A only)

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

Vacuum

pump

CAUTION

• KEEP IMPORTANT 5 POINTS FOR PIPING WORK.
(1) Take away dust and moisture (inside of the connecting pipes).
(2) Tighten the connections (between pipes and unit).
(3) Evacuate the air in the connecting pipes using a VACUUM PUMP.
(4) Check gas leak (connected points).
(5) Be sure to fully open the packed valves before operation.

Packed valve handling precautions

• Open the valve stem until it touches the stopper. Once it is in contact with
the stopper, refrain from applying any more force than is necessary.

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

Stripping length of the connecting cable

3

2

Terminal
block

Connecting cable Power cord Connecting cable Power cord

1

10

30

10

40

Earth line

L

10

30

RAS-10SAVR-A, RAS-18SAV-E

3

2

Terminal
block

123 LN

Connecting cable Power cord Connecting cable Power cord

1

10

30

10

40

Earth line

L

10

30

CAUTION

• Wrong wiring connection may cause some electrical parts burn out.

• Be sure to comply with local rule on running the wire from indoor unit

to outdoor unit (size of wire and wiring method, etc.).

• Every wire must be connected fi rmly.

• If incorrect or incomplete wiring is carried out, it will cause an ignition

or smoke.

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

• This product can be connected to the mains.

Connection to fi xed wiring : A switch which disconnects all poles and

has a contact separation of at least 3 mm must be incorporated in the
fi xed wiring.

N

10

40

N

10

40

– 73 –

10-5. OTHERS

10-5-1. Gas Leak Test

OTHERS

Unit B setup.

Press and hold MODE button for more than 20 seconds.
When A setup changed to B setup : 5 beeps will sound and operation

lamp blinks for 5 seconds.

When B setup changed to A setup : 5 beep will sound.

10-5-4. Test Operation

Check places for fl are nut connection
(Indoor unit)

Valve cover

• Check the fl are nut
connections for the gas
leak with a gas leak
detector or soap water.

Check places for the outdoor unit.

10-5-2. Setting of Remote Control

Selector Switch

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

Remote control selector switch

• When two indoor units are installed in the same room or adjacent two
rooms, if operating a unit, two units may receive the remote control
signal simultaneously and operate. In this case, the operation can
be preserved by setting either one indoor unit or remote control to B
setting (Both are set to A setting in factory shipment).

• The remote control signal is not received when the settings of indoor
unit and remote control are different.

• There is no relation between A setting/B setting and A room/B room
when connecting the piping and cables.

To switch the TEST RUN (COOL) mode, press OPERATION button for 10
seconds (The beeper will make a short beep).

10-5-5. Auto Restart Setting

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

Information

The product are shipped with Auto Restart function in the off position.
Turn it on as required.

How to set the Auto Restart

1.

Press and hold
the operation (3 beep sound and OPERATION lamp blink 5 time/sec for 5
seconds).

2. Press and hold
cancel the operation (3 beep sound but OPERATION lamp does not blink).

• In case of ON timer or OFF timer are set, it dose not activate.

OPERATION

OPERATION

button on the indoor unit for 3 seconds to set

button on the indoor unit for 3 seconds to

10-5-3. Remote Control A-B Selection

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

Remote Control B Setup.

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

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

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

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

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

"B" Display

"00" Display

PRESET FAN

– 74 –

11. HOW TO DIAGNOSE THE TROUBLE

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

Table 11-1

No.

1

2
3
4

5

Troubleshooting Procedure

First Confirmation

Primary Judgment
Judgment by Flashing LED of Indoor Unit
Self-Diagnosis by Remote Controller

Judgment of Trouble by Every Symptom

No.

6

7
8
9

10

Troubleshooting Procedure

How to Check Simply the Main Parts

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

How to Simply Judge Whether Outdoor
Fan Motor is Good or Bad

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

CAUTION: HIGH VOLTAGE

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

P.C. board by hand.

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

(3DV: 3-shunt Discrete Vector control)

K The control circuitry has an uninsulated construction.

Shared potential

MCU

Driver

Driver

Amplifier

Fig. 11-1

Amplifier

IGBT × 6

FET × 6

Compressor

Fan motor

– 75 –

CAUTION

Sensor leads

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

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

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

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

Fig. 11-2

Do NOT lay the circuit board assembly flat.

K Precautions when inspecting the control section of the outdoor unit

NOTE :

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

< Discharging method >

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

2. As shown below, connect the discharge resistance (approx. 100. 40W) or plug of the soldering iron to

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

Discharging position
(Discharging period
10 seconds or more)

Plug of
soldering iron

Inverter cover

P. C. board
(Soldered surface)

Fig. 11-3

– 76 –

11-1. First Confirmation

11-1-1. Confirmation of Power Supply

Confirm that the power breaker operates (ON) normally.

11-1-2. Confirmation of Power Voltage

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

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

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

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

taining of air conditioner.

Table 11-1-1

No.

1

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

2

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

3

In Dry and ECO mode, FAN (air flow)
display does not change even though FAN
(air flow select) button is operated.

4

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

5

In AUTO mode, the operation mode is
changed.

Operation of air conditioner

Description

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

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

The air flow indication is fixed to [AUTO].

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

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

6

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

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

– 77 –

11-2. Primary Judgment

To diagnose the troubles, use the following methods.

1) Judgment by flashing LED of indoor unit

2) Self-diagnosis by service check remote controller

3) Judgment of trouble by every symptom

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

11-3. Judgment by Flashing LED of Indoor Unit

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

Table 11-3-1

Indoor indication

lamp flashes.

Which lamp

does flash?

Item

A

B

C

D

E

Check

code

Block display Description for self-diagnosis

OPERATION (Green)
Flashing display (1 Hz)

OPERATION (Green)
Flashing display (5 Hz)

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

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

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

Power failure (when power is ON)

Protective circuit operation for indoor P.C. board

Protective circuit operation for connecting cable
and serial signal system

Protective circuit operation for outdoor P.C. board

Protective circuit operation for others
(including compressor)

NOTES :

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

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

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

– 78 –

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

1. If the lamps are indicated as shown B to E in Table 11-3-1, execute the self-diagnosis by the remote controller.

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

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

1

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

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

2

Press [ON ] or [OFF ] button

AU TO

PRESET

ONE-TOUCH

QUIET

SWING

FLOOR

SLEEP

CHK

TE

MP

FIX

Hi-POWER ECO

TIMER

ON

FILTER

TEMP

OFF

AUT O

FAN

MODE

COMFORT

SLEEP

CLR

SET

CLOCK

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

• • •

• The TIMER indicator of the indoor unit flashes continuously.
(5 times per 1 sec.)

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

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

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

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

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

• All indicators on the indoor unit will flash.
(5 times per 1 sec.)

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

3

Press [CLR] button. After service finish for clear

service code in memory.

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

control.

4

Press [ ] button to release the service mode.

• The display of the remote controller returns to as it

was before service mode was engaged.

Fig. 11-4-1

– 79 –

11-4-2. Caution at Servicing

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

2. After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power
supply again so that memory in the microcomputer returns the initial status.

However, the check codes are not deleted even if the power supply is turned off because they are stored in
the fixed memory.

3. After servicing, press [CLR] button under check mode status and then send the check code “7F” to the
indoor unit. The error code stored in memory is cleared.

Table 11-4-1

Block distinction

Check

code

Indoor P.C.
board etc.

Not
displayed

Connecting
cable and
serial signal

Block

Check

code

Operation of diagnosis function

Cause of operation

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

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

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

j sensor)

(TC

Lock of indoor fan or
trouble on the indoor fan
circuit

Trouble on other indoor
P.C. boards

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

1) Defective wiring of
connecting cable

2) Operation of compres­sor thermo Gas
shortage Gas leak

Air

conditioner

status

Operation
continues.

Operation
continues.

Operation
continues.

All off

Operation
continues.

Operation
continues.

Remarks

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

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

Judgment and action

1. Check the room temp. sensor.

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

1. Check heat exchanger sensor.

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

1. Check heat exchanger sensor.

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

1. Check the motor.

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

Replace P.C. board.

1. When the outdoor unit never
operate:

1) Check connecting cable, and
correct if defective wiring.

2) Check 25A fuse of inverter
P.C. board.

3) Check 3.15A of inverter P.C.
board.

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

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

– 80 –

Block distinction

Check

code

Block

Outdoor P.C.
board

Not
displayed

Outdoor P.C.
board

Check

code

Operation of diagnosis function

Cause of operation

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

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

Current-detect circuit
error

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

Disconnection or short­circuit of discharge
temp. sensor

Outdoor fan drive
system error

Outdoor heat exchanger
temp. sensor error

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

S)

Air

conditioner

status

All off

All off

All off

All off

All off

All off

Operation
continues

All off

Remarks

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

——

Displayed when
error is detected.

Judgment and action

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

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

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

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

1. Check sensors (TE, TS).

2. Check P.C. board.

1. Check discharge temp. sensor
(TD).

2. Check P.C. board

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

1. Check outdoor temp. sensor
(TO).

2. Check P.C. board.

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

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

3. When 20 seconds passed after

start-up, position-detect circuit
error occurred. : Replace
compressor. Trouble on P.M.V.

– 81 –

Block distinction

Check

code

Block Cause of operation

Check

code

Operation of dia gnosis function

Air

conditioner

status

Remarks

Judgment and action

Others
(including
compressor)

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

1) Compressor thermo.
operation
Gas shortage
Gas leak

2) Instantaneous power
failure

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

Discharge temp.
exceeded 117°C

Break down of
compressor

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

Operation
continues

All off

All off

All off

Operation
continues

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

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

——

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

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

1. Trouble on compressor

2. Trouble on wiring of compressor
(Missed phase)

1. Check dischage temp. sensor
(TD).

2. Gas leakage

3. Trouble on P.M.V.

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

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

1. Check 4-way valve operation.

– 82 –

11-5. Judgment of Trouble by Every Symptom

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

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

1. Is the supply voltage normal?

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

3. Is the crossover cable connected properly?

4. Is the fuse (F01) blown?

Operation

Check Item

Considerable principle cause

NO

(DC12V or 7V or 5V)

indicated on rear of

Is DC310–340V

supplied between

CN301 1 – 3 ?

Turn off power supply once, and
5 second later, turn it on again.

NO

Is OPERATION indicator flashing?

Is fuse (F01)

of indoor control

board blown?

NO

Is voltage

indoor control
board normal?

NO

Parts of a power supply circuit

YES

Is it possible to turn on

power supply by pushing

[ ] button

on remote controller?

YES YES

Unit operates normally.

YES YES

Parts (R01, R02, DB01, C01, C03

IC101 and T101) are defective.

YES

defective.

Does transmission mark

NO NO

on remote controller flash

normally,and is its signal

transmitted properly?

Does fan

motor connector

between CN301 1 –

3 short-circuit?

Microcomputer

is defective.

NO

Measures

Item by symptoms

Remote controller is defective.

Refer to (5) “Troubleshooting
for remote controller”.

Replace main
P.C. board

YES

Replace fan
motor.

• Be sure to disconnect the motor connector CN301 after shut off the power supply, or it will be a cause of
damage of the motor.

(2) Power is not turned on though Indoor P.C. board is replaced
<Confirmation procedure>

Turn on power supply.

Does OPERATION indicator flash?

YES YES

NO

Is wired correctly to white and

black lead wires of terminal block?

NO

Correct wiring.

To item of
“Power supply is not turned on”.

– 83 –

(3) Only the indoor motor fan does not operate

<Primary check>

1. Is it possible to detect the power supply voltage (AC220–240V) between Q and R on the terminal block?

2. Does the indoor fan motor operate in cooling operation?
(In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned
on, to prevent a cold air from blowing in.)

Turn off power
supply once, and
turn it on again.

Does fan motor

continue to operate?

NO

Start to operate
indoor unit in cooling
operation at airflow
level “LOW”.

Does indoor
fan operate?

YES

Change airflow level
to “HIGH”.

Is it possible to detect

YES

DC 1V or more between

5

+ and 3 – of

motor connector (CN301).

YES

Is it possible to detect

NO

DC 310–340V between

1

+ and 3 – of motor

connector (CN3

YES

(Motor connection condition)

Is it possible to detect DC 15V

between

motor connector (CN3

+

4

and 3 – of

YES

Start to operate the

indoor unit in except

heating operation.

At this time, is it possible to

detect DC 1V or more between

5

+ and 3 – of motor

connector (CN301)?

01).

01).

NO

NO

Turn off indoor unit and remove
connector from motor.

NO

Then push
on remote controller to stop
flashing lamp on indoor unit.

Turn off indoor unit and

NO

remove connector from motor.
Then start to operate indoor
unit with remote controller.

[ ] button

Is it possible to detect

DC 15V between

3

– of motor

and

connector (CN301).

YES

4

+

NO

Peplace indoor
fan motor.

Peplace main
P.C. board.

Is it possible to

change airflow level

to “HIGH”?

YES

Fan motor
operates normally.

NO

Turn off indoor unit

and rotate cross-flow

fan by hand when the

unit is on standby.

At this time, is it possible to

detect DC 1V or more

between

5

+ and 3 –

of motor connector

(CN3

YES

YES

01).

YES

Start to operate the

indoor unit in except

heating operation.
At this time, is it possible
to detect DC 1V or more

between

of motor connector (CN301)?

(Check this condition

within 15 seconds after

starting unit.)

NO

– 84 –

5

+ and 3 –

YES

NO

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

<Cause>

The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor.
If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning

on power supply.

<Inspection procedure>

1. Remove the front panel. (Remove 4 screws.)

2. Remove the cover of the indoor unit controller. (remove 1 screw.)

3. Check DC voltage with CN301 connector while the fan motor is rotating.

NOTE :

• Do not disconnect the connector while the fan motor is rotating.

• Use a thin test rod.

Indoor fan starts rotating when power supply is turned on.

P.C. board

(Check output DC voltage of fan motor on P.C. board.)

Measure voltage between 3 (GND : BLACK)

and 5 (V line : YELLOW) of motor connector (CN301)

while indoor fan motor is rotating.

DC 1.0V or more

P.C. board is defective.

Replace P.C. board. Replace motor.

Under DC 1.0V

Motor is defective.

Yellow

Black

DC

CN31

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

– 85 –

(5) Troubleshooting for remote control
<Primary check>

Check that A or B selected on the main unit is matched with A or B selected on the remote control.

Is receiver

on indoor unit

exposed to

direct sunlight?

YES

NO

Is there any

thyristor

fluorescent light

nearby?

YES

NO

NO

Push the [ ] button.

Is transmission
mark indicated?

YES

Push RESET button
on remote controller
with tip of pencil.

Does indoor unit

operate when moving

remote control

near receiver or

indoor unit?

YES

Batteries are

exhausted.

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

NO

Avoid direct
sunlight.

NO

Keep indoor unit
away from thyristor
fluorescent light.

Does indoor unit

start to operate by

automatic restart

function?

YES

Does radio sound

is affected by remote

controller when a signal is

transmitted at distance of

5 cm from radio?

YES

P.C. board

is defective.

Replace
P.C. board.

NO

NO

Replace
batteries.

Push the [ ]

button

Is transmission

mark indicated?

YES

Does indoor unit

beep and operate?

YES

Normal

operation

NO

Remote controller

is defective.

Replace
remote controller.

NOTE : After replacing batteries,

push the RESET button
with a tip of a pencil.

– 86 –

11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)

(1) Outdoor unit does not operate

1) Is the voltage between R and S of the indoor terminal block varied?
Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the follow-

ing diagram.

NOTE:

• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.

• Be sure to prepare a diode for judgment.

Terminal block at indoor side

Red

White

3

S5277G

2

S5277G or equivalent (G or J type)
(Diode with rated voltage of 400V
or more is acceptable.)

Tester

Normal time

1

Terminal block

:

Voltage swings between DC15 and 60V. ...................Inverter Assembly check (11-7-1.)

Abnormal time : Voltage does not vary.

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

1) The outdoor unit stops 10 to 20 minutes after operation started, and 10 minutes or more are required to
restart the unit.

Gas circulation amount is down.

Measure gas pressure.

Thermo. operation of compressor

Gas shortage
Gas leak
Pipe clogging

2) If the unit stops once, it does not operate until the power will be turned on again.

To item of Outdoor unit does not operate.

3) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed.
(Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)

Gas leak
P.M.V. is defective.
Miswiring of connecting wires of indoor/outdoor units
Clogging of pipe and coming-off of TC sensor

Refer to the chart in 11-6.

– 87 –

11-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E

<Check procedure>

1C 1E

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

Valve drive check

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

Is coil of the pulse motor valve

(P.M.V.) correctly set?

YES

Is connecter of coil connected to inverter?

YES

from valve when the air conditioner starts the operation after turning off power

Is positioning sound of valve (sound hitting to stopper) heard

of the air conditioner once?

YES

Are temp. sensors of indoor/outdoor units correctly set to the holder?

NOTE :

The temperature sensors which are used to control pulse motor valve
include indoor heat exchanger sensor (TC), outdoor heat exchanger temp.
sensor (TE), outdoor suction temp. sensor (TS) and outdoor sensor (TO).

YES

NO

NO

NO

NO

Set it correctly.

Set it correctly.

Replace coil valve.

Set it correctly.

Gas amount check and valve clogging check

Remove TC sensor connector from the P.C. board in indoor unit.
(Remove connector from the P.C. board.)
Operate the air conditioner in COOL mode by TEMP button
(“Beep” sound is heard if keeping pushed for 10 seconds.).
The operation enters temporary operation mode which fixes opening degree of compressor speed.
Check condensation at outlet of PMV, and then check operating pressure from the service port.

If there is condensation at outlet (1/4 inch=Ø6.35mm valve side),

Check the operating pressure from service port, and add gas if pressure is low.

Existence of condensation at outlet of P.M.V.

the valve is clogged.

YES

– 88 –

Replace valve.

Add gas.

11-7. How to Diagnose Trouble in Outdoor Unit

11-7-1. Summarized Inner Diagnosis of Inverter Assembly

Table 11-7-1

Diagnosis/Process flowchart Item

Preparation

Remove connector
of compressor.

Check 25A fuse

(Part No.F01).

OK

Check

terminal voltage

of electrolytic

capacitor.

OK

NG

Replace fuse.

Check

electrolytic

capacitor, diode

block (DB01),

etc.

NG

Check

electrolytic

capacitor, diode

(DB01),

etc.

Check

Check

Contents

Tu r n “OFF” the power supply
breaker, and remove 3P
connector which connects
inverter and compressor.

• Check whether 25A fuse
on the control board
assembly is blown or not.
(F01)

Summary

If fuse was blown, be sure to
check the electrolytic
capacitor and diode block.
(DB01)

• Connect discharge

resistance (approx. 100. ,
40W) or soldering iron
(plug) between +, –
terminals of the electro-

lytic capacitor (500µF or
760µF) of C14 (with printed
CAUTION HIGH VOLTAGE)
on P.C. board.

Discharging position
(Discharging period
10 seconds or more)

Plug of
soldering
iron

Does outdoor

fan rotate?

YES

NG

Replace
outdoor
fan motor.

NO

Remove connector

CN300 of outdoor fan

motor, and using a

tester, check resistance

value between every
phases at motor side.

OK

BA

Operation

Measure-

ment

Check

Stop

Check

Measure-

ment

Turn on the power breaker,
and operate the air condi­tioner in COOL mode by time
shortening.

Measure terminal voltage of
the electrolytic capacity.

500µF:400WV x 3

760

µ

F:400WV x 3

After operation, turn off the
power breaker after 2
minutes 20 seconds passed,
and discharge the electro­lytic capacitor by soldering
iron.
Check voltage between
motor phases.

• Is not winding between

R‚ R-S

, or Q-S opened

Q

or short-circuited?

• Is not frame grounded with

, or S?

Q, R

OK if 500µF or 760µF .
DC280 to 380V

Remove CN300 while
pushing the part indicated
by an arrow because CN300
is a connector with lock.

-

. Resistance between

phases should be
approx. 55 to 77.

. Should be 10M. or

more.

– 89 –

Diagnosis/Process flowchart Item

Contents

Summary

Check

compressor

winding

resistance.

OK

Replace

control board.

BA

Replace control
board assembly.

NG

Replace

compressor.

Check

Operation

Check winding resistance
between phases of compres­sor, and resistance between
outdoor frames by using a
tester.

• Is not grounded.

• Is not short-circuited
between windings.

• Winding is not opened.

Remove connector CN300 of
the outdoor fan motor, turn
on the power supply breaker,
and perform the operation.
(Stops though activation is
prompted.)

Check operation within 2
minutes 20 seconds after
activation stopped.

. OK if 10M. or more

.

. OK if 0.51. . 0.57.

.

(Check by a digital tester.)

.

11-9. How to Check Simply the Main Parts

11-9-1. How to Check the P.C. Board (Indoor Unit)

(1) Operating precautions

1) When removing the front panel or the P.C. board, be sure to shut off the power supply breaker.

2) When removing the P.C. board, hold the edge of the P.C. board and do not apply force to the parts.

3) When connecting or disconnecting the connectors on the P.C. board, hold the whole housing. Do not pull
at the lead wire.

(2) Inspection procedures

1) When a P.C. board is judged to be defective, check for disconnection, burning, or discoloration of the
copper foil pattern or this P.C. board.

2) The P.C. board consists of the following 2 parts

a. Main P.C. board part :

DC power supply circuit, Indoor fan motor control circuit, CPU and peripheral circuits,
buzzer, and Driving circuit of louver.

b. Indication unit of infrared ray receiving infrared ray receiving circuit, LED :

To check defect of the P.C. board, follow the procedure described below.

– 90 –

(3) Check procedures

1

Turn off the power supply breaker
and remove the P.C. board
assembly from electronic parts
base. Remove the connecting
cables from the terminal block.

2

Remove the connector of the
motor and turn on the power
supply breaker. If OPERATION
indicator flashes (once per
second), it is not necessary to
check steps (1 to 3) in the right
next column.

Table 11-9-1

Check whether or not the fuse (F01)
is blown.

Check power supply voltage :

1. Between CN01 and No. 3 of CN301
(AC 220–240V)

2. Between and of C03
(DC 310–340V)

3. Between of IC122 and output

side of IC122 (DC15V)

4. Between 12V and GND

5. Between 5V and GND

Causes

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

1. The terminal block or the crossover
cable is connected wrongly.

2. The fuse (F01), line filter
(L01), resistor (R02), of the diode

(DB01) is defective.

3. TC122 and T101 are defective.

4. D122, TC124 and T101 are defective

5. IC121,IC124, IC102,D121 and T101

are defective.

3

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

4

Shorten the restart delay timer
and start unit.

5

Push [ ] button once
to start the unit,

• Shorten the restart delay timer.

• Set the operation mode to
COOL.

• Set the fan speed level to
AUTO.

• Set the preset temperature
much lower than the room
temperature. (The unit (com­pressor) operates continuously
in the above condition.)

6

If the above condition (No. 5) still
continues, start the unit in the
following condition.

• Set the operation mode to
HEAT.

• Set the preset temperature
much higher than room tem­perature.

Check power supply voltage :

1. Between CN01 and
CN501 (DC 15–60V)

Check whether or not all indicators
(OPERATION, TIMER, FILTER)
are lit for 3 seconds and they return
to normal 3 seconds later.

1. Check whether or not the com­pressor operates.

2. Check whether or not the OP­ERATION indicator flashes.

1. Check whether or not the com­pressor operates.

2. Check whether or not the OP­ERATION indicator flashes.

IC501 and IC502 are defective.

The indicators are defective or the
housing assembly (CN51) display PCB)

is defective.

1. The temperature of the indoor heat
exchanger is extremely low.

2. The connection of the heat ex­changer sensor is loose.
(The connector is disconnected.)
(CN602 and CN603)

3. The heat exchanger sensor and the
P.C. board are defective.
(Refer to Table 11-4-1.)

4. The main P.C. board is defective.

1. The temperature of the indoor heat
exchanger is extremely high.

2. The connection of the heat ex­changer sensor short-circuited.
(CN602 and CN603)

3. The heat exchanger sensor and the
P.C. board are defective.
(Refer to Table 11-4-1.)

4. The main P.C. board is defective

7

Connect the motor connector to
the motor and turn on the power
supply.
Start the unit the following
condition.

• Set the fan speed level to HIGH.
(The unit (compressor) operates
continuously in the above
condition in No. 5.)

1. Check it is impossible to detect
the voltage (AC120V or higher

voltage) between red and black

lead of the motor.

2. The motor does not operate or
the fan motor does not rotate with
high speed.
(But it is possible to receive the

signal from the remote controller.)

3. The motor rotates but vibrates
strongly.

– 91 –

1. The indoor fan motor is defective.
(Protected operation of P.C. board.)

2. The P.C. board is defective.

3. The connection of the motor
connector is loose.

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

[1] Sensor characteristic table

100

90

80

70

60

50

40

30

Resistance value (k )

20

10

0

0102030 4050

Temperature ( C)

TD

TA, TC, TCJ, TO, TE, TS

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

– 92 –

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

No.

1

Room temp. (TA) sensor

Part name

Heat exchanger (TC) sensor

Heat exchanger (TCJ)sensor

23Remote controller

Louver motor & Damper motor
MP24Z3T

4

Indoor fan motor

ICF-340-41-1

11-9-4. Outdoor Unit

No.

1

Compressor
(Model : DA130A1F-27F)

RAS-18SAV-E, RAS-18SAV2-E

(Model : DA89X1C-23FZ2)

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

Part name

Checking procedure

Disconnect the connector and measure the resistance value with tester.
(Normal temp.)

Sensor

Temperature

TA, TC,TCJ (k. )

10°C20°C25°C30°C40°C

20.7 12.6 10.0 7.9 4.5

Refer to 11-5-1. (5).

Measure the resistance value of each winding coil by using the tester.
(Under normal temp. 25°C)

White
Yellow
Yellow
Yellow
Yellow

1

1

2

2

3

3

4

4

5

5

Position

1 to 2
1 to 3
1 to 4
1 to 5

Resistance value

250 ± 20.

Refer to 11-5-1. (3) and (4).

Checking procedure

Measure the resistance value of each winding by using the tester.

Red

White Blac

k

Position

Red - White

White - Black

Black - Red

Resistance value

DA130A1F-27F

0.92 to 1.02Ω

DA89X1C-1F-23FZ



1.04 to 1.16Ω

Under 20ºC

2

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

3

4-way valve coil
(Model : STF-01AJ646A1)

4

Pulse motor valve coil

(Model : CAM-MD12TF-16)

or

(Model : CAM-MD12TF-10)

RAS-18SAV-E

Measure the resistance value of winding by using the tester.

Red

Position

Resistance value

Red - White

White - Black

White Black

Black- Red

Measure the resistance value of winding by using the tester.

Resistance value

1435 ± 144.

Measure the resistance value of winding by using the tester.

CAM-MD12TF-16
Position
Red-White
Red-Orange
Red-Yellow
Red-Blue

Resistance value

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

CAM-MD12TF-10
Position
Red-White
Red-Orange
Brown-Yellow
Brown-Blue

Resistance value

20 to 22.
20 to 22.
20 to 22.

Under 20°C

42 to 50Ω

42 to 50Ω
42 to 50Ω
42 to 50Ω

– 93 –

No.

Part name Checking procedure

4 Pulse motor valve coil

(Model : CAM-MD12TCTH-2)

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

5

Outdoor temperature sensor
(TO), discharge temperature

sensor (TD), suction
temperature sensor (TS),

outdoor heat exchanger
temperature sensor (TE)

CAM-MD12TCTH-2
Position
Gray-White
Gray-Orange
Red-Yellow
Red-Blue

Disconnect the connector and measure the resistance value with tester.
(Normal temp.)

Sensor

11-9-5. Checking Method for Each Part

No.

1

Part name

Electrolytic capacitor
(For boost, smoothing)

1. Turn OFF the power supply breaker.

2. Discharge all three capacitors completely.

3. Check that safety valve at the bottom of capacitor is not broken.

4. Check that vessel is not swollen or exploded.

5. Check that electrolytic liquid does not blow off.

6. Check that the normal charging characteristics are shown in continuity test by
the tester.

Resistance value

Temperature

TD (kΩ )

TO,TS,TE (kΩ )

43 to 49Ω

43 to 49Ω
43 to 49Ω
43 to 49Ω

10°C20°C25°C30°C40°C50°C

100 64 50 41 27 18

20.7 12.6 10.0 7.9 4.5 —

Checking procedure

2

Diode block

C12 C13 C14

MCC-5009

Soldered

Heat sink IGBT side

C12, C13, C14 . 500µF or 760µF/400V

1. Turn OFF the power supply breaker.

2. Completely discharge the four electrolytic capacitors.

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

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

+

1

~~

23

123

–

4

surface

~

+ –

~

4

(DBO1)

Case that product is good

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

Tester rod

+ –

~

2

~

+

3

~

–

4

~

10 to 20 . when the multimeter probe
is reversed

Resistance value

in good product

1

2

3

∞

– 94 –

11-10. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

1. Symptom

• Outdoor fan motor does not rotate.

• Outdoor fan motor stops within several tens seconds though it started rotating.

• Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc.
Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”

2. Cause

The following causes are considered when the outdoor fan motor does not normally rotate.

1) Mechanical lock of the outdoor fan motor

2) Winding failure of the outdoor fan motor

3) Position-detect circuit failure inside of the outdoor fan motor

4) Motor drive circuit failure of the outdoor P.C. board

3. How to simply judge whether outdoor fan motor is good or bad

Turn OFF the breaker.

Disconnect two connectors (CN300) of the

outdoor fan motor from the outdoor P.C. board.

Does the fan rotate without trouble

when rotating it with hands?

YES

If the resistance value between
1 (Red lead) – 2 (White lead)
2 (White lead) – 3 (Black lead)
3 (Black lead) – 1 (Red lead)

of the connector
(CN300 : Motor winding)
is 17 to 25Ω, it is normal.

YES

Fan motor is normal.

(Outdoor P.C. board error)

NO

NO

CN300

Fan motor error

NOTE :

However, GND circuit error inside of the motor may be accepted in some cases when the above check is
performed.

When the fan motor does not become normal even if P.C. board is replaced, replace the outdoor fan motor.

– 95 –

12. HOW TO REPLACE THE MAIN PARTS

WARNING

• Since high voltages pass through the electrical parts, turn off the power without fail before proceeding with
the repairs.

Electric shocks may occur if the power plug is not disconnected.

• After the repairs have been completed (after the front panel and cabinet have been installed), perform a
test run, and check for smoking, unusual sounds and other abnormalities.

If this check is omitted, a fire and/or electric shocks may occur.
Before proceeding with the test run, install the front panel and cabinet.

• Ensure that the following steps are taken when doing repairs on the refrigerating cycle.

1. Do not allow any naked flames in the surrounding area.

If a gas stove or other appliance is being used, extinguish the flames before proceeding.
If the flames are not extinguished, they may ignite any oil mixed with the refrigerant gas.

2. Do not use welding equipment in an airtight room.

Carbon monoxide poisoning may result if the room is not properly ventilated.

3. Do not bring welding equipment near flammable objects.

Flames from the equipment may cause the flammable objects to catch fire.

• If keeping the power on is absolutely unavoidable while doing a job such as inspecting the cir-

cuitry, wear rubber gloves to avoid contact with the live parts.

Electric shocks may be received if the live parts are touched.
High-voltage circuits are contained inside this unit.

Proceed very carefully when conducting checks since directly touching the parts on the control circuit
board may result in electric shocks.

No. Part name Procedure

① Front panel 1) Stop operation of the air conditioner

and turn off the main power supply.

2) Grip the air inlet grille by two hands
at the handle positions.

3) Pull the air inlet grille as the
arrow direction and remove the rope
from the hook of front panel.

4) Remove screws for front panel. (4 pcs)

Remarks

Air in let gri lle

Hook of front panel

Rope

4) Screws of front
panel (4 pcs)

– 96 –

No. Part name Procedure

② Electrical parts 1) Remove screw for E-box cover.

Box assembly
(E-box)

Remarks

Tube

2) Remove screw for drain guide. (4 pcs)

3) Remove screw for earth-lead.

4) Remove screw for display base.

5) Pull off the TC, TCJ sensor.

6) Take off fan motor conector.

7) Take off louver motor conector.

8) Take off damper motor conector.

TC sensor

1) Screw for E-box cover

2) Screws for
drain guide

(4 pcs)

7) Louver motor connector

9) Screw for earth-lead from
fan motor base

TCJ sensor

4) The screw for
display base

3) Screw for
earth-lead

5) TCJ sensor

5) TC sensor

9) Remove screw for earth-lead from fan
motor base.

10) Remove screw for E-box

11) - ① Pull the upper part of the E-box.

11) - ② Lift a E-box in the upward for
take off from the hook.

– 97 –

10) Screw for E-box

8) Damper motor connect or

6) Fan motor connector

②

①

Hook for locking E-box

No. Part name Procedure

Remarks

② Electrical parts <How to arrange the lead>

Box assembly Shown in the picture.
(E-box)

③ Heat exchanger 1) Take off the pipe holder.

(Refrigerant
cycle assembly)

Display unit lead

Louver motor lead

Fan motor lead

Earth-lead from

fan motor base

Damper motor lead

Pipe holder

2) Remove screws for heat exchanger.
(4 pcs)

④ Horizontal 1) Open a horizontal louver outward and

louver stretch the arm of louver base same as

the direction in the picture.

Screws for heat
exchanger (4 pcs)

– 98 –

No. Part name Procedure

Remarks

⑤ Louver base 1) Remove screws for louver base.

assembly (2 pcs)

2) - ① Pull the upper part of the louver

base to upward.

2) - ② Take off the louver base by pull

out in the front direction.

<Attention for louver base assemble>

Insert the rib of the louver base into the
slot of back body same as the picture.

Screws for louver base (2 pcs)

②

①

⑥ Bell mouth 1) Remove screws for bell mouth. (4 pcs)

⑦ Drain pan and 1) Remove screws for drain pan. (2 pcs)

damper base

2) Remove screws for damper base.

(2 pcs)

Back body slot

Louver base rib

Screws for damper base
(2 pcs)

Screw for drain pan

Screws for bell mouth
(4 pcs)

Screw for drain pan

– 99–

No. Part name Procedure

⑧ Turbo fan 1) Turn the flange nut (M10) in the

counter-clockwise direction and take it off.

2) Pull out the turbo fan from the fan
motor shaft.

<Attention for turbo fan assemble>
The tightening torque of the flange nut
is 5N·m.

⑨ Fan motor 1) Remove screws for motor holder,

and take off the motor holder.

2) Take off the lead cover.

Remarks

Motor holder

<Attention for motor holder assemble>

1. Arrange the earth lead and fan
motor lead.

2. Adjust the motor axis to the center
of the motor holder then fix screws 4 pcs.

⑩ Fan motor A method to take off a fan motor in a

condition taking on a heat exchanger.

1) Take off pipe holder and remove
screws for heat exchanger. (refer to ③)

Screws for motor hold

(4 pcs)

Lead cover

2) Remove screws for the bell mouth.
(refer to ⑥)

– 100 –