Toshiba RAS-13UKV-E, RAS-13UAV-E SERVICE MANUAL

.ILE NO. A02-001

SPLIT TYPE

RAS-13UKV-E

RAS-13U AV-E

PRINTED IN JAPAN, Mar.,2002 ToMo

CONTENTS

1. SPECIFICATIONS ..................................................................................... 3

2. REFRIGERANT R410A ............................................................................. 5

3. CONSTRUCTION VIEWS ........................................................................ 13

4. WIRING DIAGRAM.................................................................................. 15

5. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 17

6. REFRIGERANT CYCLE DIAGRAM ........................................................ 18

7. CONTROL BLOCK DIAGRAM ................................................................ 20

8. OPERATION DESCRIPTION................................................................... 22

9. INSTALLATION PROCEDURE................................................................ 35

10. HO W TO DIA GNOSE THE TROUBLE...................................................... 44

11. HO W TO REPLACE THE MAIN P AR TS................................................... 63

12. EXPLODED VIEWS AND PARTS LIST ................................................... 74

– 2 –

1. SPECIFICATIONS

1-1. Specifications

RAS-13UKV-E/RAS-13UAV-E

Unit model Indoor

Outdoor
Current limited
Cooling capacity (kW)
Cooling capacity range (kW)
Heating capacity (kW)
Heating capacity range (kW)
Power supply
Electric Indoor Operation mode

characteristics

Outdoor Operation mode

COP (Cooling/Heating)
Operating noise Indoor High (Cooling / Heating) (dB•A)

Outdoor (Cooling / Heating) (dB•A)
Indoor unit Unit model

Dimension Height (mm)

Net weight (kg)

Fan motor output (W)

Air flow rate (Cooling / Heating) (m³/h)
Outdoor unit Unit model

Dimension Height (mm)

Net weight (kg)

Compressor Motor output (W)

Fan motor output (W)

Air flow rate (Cooling / Heating) (m³/h)
Piping Type

connection

Refrigerant Name of refrigerant

Wiring connection Power supply

Usable temperature range Indoor (Cooling / Heating) (°C)

Accessory Indoor unit Installation plate

Indoor unit Liquid side

Outdoor unit Liquid side

Maximum length (Per unit) (m)

Maximum chargeless length (m)

Maximum height difference (m)

Weight (kg)

Interconnection

Outdoor unit Drain nipple

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

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

Medium (Cooling / Heating) (dB•A)
Low (Cooling / Heating) (dB•A)

Width (mm)
Depth (mm)

Width (mm)
Depth (mm)

Type
Model

Gas side

Gas side

Outdoor (Cooling / Heating) (°C)

Wireless remote controller
Remote controller holder
Flat head wood screw
Purifying filter
Zeolite filter
Batteries
Mounting screw
Installation manual
Owner’s manual

Twin rotary type with DC-inverter variable speed control

220 – 230 –240V – 1Ph – 50/60Hz

Cooling Heating

0.15 0.15
30 30
87 87

Cooling Heating

5.07 / 4.84 / 4.63 5.40 / 5.16 / 4.94
1060 1130

95 95

3 Wires : includes earth (Outdoor)

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

RAS-13UKV-E
RAS-13UAV-E

—

3.5

0.9 – 4.0

4.2

0.9 – 6.0

5.55 / 5.31 / 5.09

3.21 / 3.62
39 / 39
33 / 34
26 / 28
48 / 50

RAS-13UKV-E

275
790
208

10
30

530 / 620

RAS-13UAV-E

550
780
270

38

750

DA91A1F-44F

43

2410 / 2410

Flare connection

Ø6.35
Ø9.52
Ø6.35
Ø9.52

15
15
10

R410A

0.8

4 Wires : includes ear th

21 – 32 / 0 – 28

10 – 43 / –10 – 24

1
1
1

2 (Ø3.1 x 16L)

1
1
2

6 (Ø4 x 25L)

1
1
1

– 3 –

1-2. Operation Characteristic Curve

<Cooling> <Heating>

7

6

RAS-13UKV-E

5

4

3

Current (A)

2

• Conditions
Indoor : DB 27˚C/WB 19˚C
Outdoor : DB 35˚C

1

Air flow : High
Pipe length : 5m
230V

0

0 20 40 60 80 100

Compressor speed (rps)

7

6

RAS-13UKV-E

5

4

3

Current (A)

2

• Conditions
Indoor : DB 20˚C
Outdoor : DB 7˚C/WB 6˚C

1

Air flow : High
Pipe length : 5m
230V

0

0 20 40 60 80 100

Compressor speed (rps)

1-3. Capacity Variation Ratio According to Temperature

<Cooling> <Heating>

105
100

95
90
85
80
75
70

Capacity ratio (%)

65
60
55
50

32 34

Current Limited Start

RAS-13UKV-E

• Conditions
Indoor : DB27˚C/WB19˚C
Indoor air flow : High
Pipe length 5m

36 38 40 4233 35 37 39 41 43

Outdoor temp. (˚C)

120
110
100

90
80
70
60
50

Capacity ratio (%)

40
30
20
10

0

–10–9–8–7–6–5–4–3–2–1012345678910

RAS-13UKV-E

• Conditions
Indoor : DB 20˚C
Indoor air flow : High
Pipe length : 5m

Outdoor temp. (˚C)

Capacity ratio : 100% = 3.5 kW (RAS-13UKV-E)

*

– 4 –

2. 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.

2-1. 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 lev el.

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.

2-2. Refrigerant Piping Installation

2-2-1. 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 v alve or capillary tube
may become bloc ked 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 2-2-1. Never use copper
pipes thinner than 0.8 mm even when it is
available on the market.

– 5 –

Table 2-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

Nominal diameter

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

(2) Joints

For copper pipes, flare joints or soc ket 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 2-2-3 to 2­2-6 below .

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

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 2-2-2.

Table 2-2-2 Minimum thicknesses of socket joints

Nominal diameter

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

Reference outer diameter of

copper pipe jointed (mm)

2-2-2. 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
other than lubricating oils used in the installed air
conditioner 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.

Minimum joint thickness

(mm)

6.35

9.52

12.70

15.88

(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 b urrs and clean the cut surface
before installation.

c) Insertion of Flare Nut

0.50

0.60

0.70

0.80

– 6 –

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

ØD

A

Fig. 2-2-1 Flare processing dimensions

Nominal

diameter

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

Nominal

diameter

1/4
3/8

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

0.8

0.8

1.0

Flare tool for R410A

clutch type

0 to 0.5 1.0 to 1.5 1.5 to 2.0
0 to 0.5 1.0 to 1.5 1.5 to 2.0
0 to 0.5 1.0 to 1.5 2.0 to 2.5
0 to 0.5 1.0 to 1.5 2.0 to 2.5

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

A (mm)

A (mm)

Outer

diameter

(mm)

6.35

9.52

Thickness

(mm)

0.8

0.8

Flare tool for R410A

clutch type

0 to 0.5 0.5 to 1.0 1.0 to 1.5
0 to 0.5 0.5 to 1.0 1.0 to 1.5

Conventional flare tool

Clutch type Wing nut type

Conventional flare tool

Clutch type Wing nut type

1/2
5/8

Nominal

diameter

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

12.70

15.88

0.8

1.0

0 to 0.5 0.5 to 1.0 1.0 to 2.0
0 to 0.5 0.5 to 1.0 1.0 to 2.0

Table 2-2-5 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

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

Dimension (mm)

– 7 –

Flare nut

width

(mm)

17
22
26
29

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

Nominal

diameter

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

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

19.05

Thickness

(mm)

0.8

0.8

0.8

1.0

1.0

˚ to 46

45

Dimension (mm)

Flare nut

width

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

˚

B A

D

C

(mm)

17
22
24
27
36

Fig. 2-2-2 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.

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

Nominal

diameter

Outer

diameter

(mm)

Tightening torque

N•m (kgf•cm)

43˚ to 45

˚

When it is strong, the flare nut may crack and
may be made non-removable. When choos­ing the tightening torque, comply with values
designated by manufacturers . Table 2-2-7
shows reference v alues.

NOTE :

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

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)

– 8 –

16 (160), 18 (180)

42 (420)
55 (550)
65 (650)

2-3. Tools

2-3-1. Required Tools

The service port diameter of pac ked valve of the outdoor unit in the air conditioner 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

conditioner installation

Whether new equipment
can be used with
conventional refrigerant

¡

(Note 1)

*

X

X

¡

¡

X

¡

X

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

Yes

Yes

Yes

Yes

Yes
Yes

Yes
Yes

R410A

Whether
conventional
equipment
can be used

(Note 1)

*

(Note 1)

*

air conditioner installation

Existence of
new equipment
for R410A

(Note 2)

X

X

X
X

X
X
X

(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 e xclusive 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 5mm)

(11) Tape measure
(12) Metal saw

Also prepare the following equipments for other installation method and run chec k.

(1) Clamp meter
(2) Thermometer

(3) Insulation resistance tester
(4) Electroscope

– 9 –

2-4. Recharging of Refrigerant

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

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

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

Connect the charge hose to the vacuum pump
adapter.

Open fully both packed valves at liquid and gas
sides.

When the compound gauge’s pointer has indicated
–0.1 Mpa (–76 cmHg), place the handle Low in the
fully closed position, and turn off the vacuum pump’s
power switch.

Keep the status as it is for 1 to 2 minutes, and ensure
that the compound gauge’s pointer does not return.

Set the refrigerant cylinder to the electronic balance,
connect the connecting hose to the cylinder and the
connecting port of the electronic balance, and charge
liquid refrigerant.

Place the handle of the gauge manifold Low in the
fully opened position, and turn on the vacuum pump’s
power switch. Then, evacuating the refrigerant in the
cycle.

(For refrigerant charging, see the figure below.)

(1) Never charge refrigerant exceeding the specified amount.
(2) If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.
(3) Do not carry out additional charging.

When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the
refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the
specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high
pressure, and may cause a rupture or personal injury.

(INDOOR unit)

(Liquid side)

(OUTDOOR unit)

Opened

Refrigerant cylinder

(With siphon pipe)

Check valve

Open/Close valve

for charging

Electronic balance for refrigerant charging

Fig. 2-4-1 Configuration of refrigerant charging

(Gas side)

Closed

Service port

– 10 –

(1) Be sure to make setting so that liquid can be charged.
(2) When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.

It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.
Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the
cylinder upside down if cylinder is not equipped with siphon.

[ Cylinder with siphon ] [ Cylinder without siphon ]

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Gauge manifold

OUTDOOR unit

cylinder

Refrigerant

Electronic

balance

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

2-5. Brazing of Pipes

2-5-1. 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.

Electronic

balance

Siphon

Fig. 2-4-2

(1) Phosphor bronze brazing filler tends to react

with sulfur and produce a fragile compound
water solution, which may cause a gas
leakage. Therefore, use any other type of
brazing filler at a hot spring resort, etc., and
coat the surface with a paint.

(2) When performing brazing again at time of

servicing, use the same type of brazing filler.

(2) Phosphor bronze brazing filler

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

(3) Low temperature brazing filler

Low temperature brazing filler is generally called
solder, and is an alloy of tin and lead. Since it is
weak in adhesive strength, do not use it for
refrigerant pipes.

2-5-2. Flux

(1) Reason why flux is necessary

• By removing the oxide film and any foreign
matter on the metal surface, it assists the flo w
of brazing filler.

• In the brazing process, it prevents the metal
surface from being oxidiz ed.

• By reducing the brazing filler’s surface tension,
the brazing filler adheres better to the treated
metal.

– 11 –

(2) Characteristics required for flux

Nitrogen gas

cylinder

Pipe

Flow meter

M

Stop valve

From Nitrogen cylinder

Nitrogen
gas

Rubber plug

• 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 br azing tem­perature is higher than 800°C.

• Activated flux

Most of fluxes generally used for silver brazing
are this type.
It features an increased o xide film remo ving
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 braz-

ing filler/flux

2-5-3. Brazing

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

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

Never use gas other than Nitrogen gas.

(1) Brazing method to prevent oxidation

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

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

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

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

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

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.

Copper - Copper

Copper - Iron

(1) Do not enter flux into the refrigeration cycle.
(2) When chlorine contained in the flux remains

(3) When adding water to the flux, use water

(4) Remove the flux after brazing.

Piping

material

Used brazing Used

filler flux

Phosphor copper Do not use

Silver Paste flux

Iron - Iron

Silver Vapor flux

within the pipe, the lubricating oil deterio­rates. Therefore, use a flux which does not
contain chlorine.

which does not contain chlorine (e.g. distilled
water or ion-exchange water).

Fig. 2-5-1 Prevention of oxidation during brazing

– 12 –

3-1. Indoor Unit

RAS-13UKV-E

Air inlet Air filter Heat exchanger

275

3. CONSTRUCTION VIEWS

790

208

606

Air outlet

790

120 590 80

Hanger

Drain hose (0.54m) Connecting pipe (0.43m)

Hanger

321

(Flare Ø6.35)

Connecting pipe (0.33m)
(Flare Ø9.52)

620

235 235

For stud bolt (Ø8 to Ø10)
For stud bolt (Ø6)

Minimum

distance

to wall

120 or more

275

26

190 4540

Minimum

distance

to wall

120 or more

Minimum

distance

to ceiling

66 or
more

215215

Hanger

45

Front panel

Back body

48

Knock out system

60

48

6

Knock out system

32

HangerHanger

90 150 160 160 150

Center line

– 13 –

40

32

90

Installation plate outline

3-2. Outdoor Unit

RAS-13UAV-E

Hanger

A leg part

310

296

(ø6 hole pitch)

(Anchor bolt long hole pitch)

B leg part

Ø4.5 embossing (Ø4STS used)
(For sunshade roof attaching)

14749,5

21

540

548

270

Fan guard

600

Ø25 drain hole

115

76

90

Ø11 x 17U-shape hole

50

(For Ø8-Ø10 anchor bolt)

8-Ø6 hole
(For fixing outdoor unit)

16

Ø11 x 17 long hole

(For Ø8-Ø10 anchor bolt)

115.5

Valve cover

Charging
port

157

59

21

54

Z

Connecting pipe port

(Pipe dia.Ø6.35)

Connecting pipe port

(Pipe dia.Ø9.52)

4 x Ø11 x 17U-shape hole
(For Ø8-Ø10 anchor bolt)

Intake

100 or

C

310

more

200 or more

8

Mounting dimensions of anchor bolt

600

50 or

more

D

Intake

Outside line
of product

Outlet

B

780 61

Z

view

A

250 or more

(Minimum distance
from wall)

4 x Ø11 × 17 long hole
(For Ø8-Ø10 anchor bolt)

322

Earth terminal

Detailed A leg part

50
36

11

310

296

R5.5

11

310

296

36
50

Detailed B leg part

600

2-Ø6 hole

2-Ø6 hole

600

R15

Outside line
of product

Outside line
of product

R15

R5.5

– 14 –

4-1. Indoor Unit

RAS-13UKV-E

COLOR IDENTIFICATIONBLU

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

CN01
(BLU)

BLK

121

BLK

HEAT EXCHANGER

SENSOR (TC)

BLK
BLK

THERMO SENSOR

(TA)

CN25
(WHI)

1
2
3
4
5
6
7
8
9

AND INDICATING PARTS

10

INFRARED RAYS RECEIVING

MCC-861

11

10
11

BLU

1

BLU

2

BLU

3

BLU

4

BLU

5

BLU

6

BLU

7

BLU

8

BLU

9

BLU
WHI

CN03
(WHI)

121

CN13
(WHI)

1
2
3
4
5
6
7
8
9

10

10

11

11

2

2

1
2
3
4
5
6
7
8
9

MAIN P.C. BOARD

1 4

FUSE

F01

T3.15A

AC 250V

MCC-867

4. WIRING DIAGRAM

21 3

WHIBLK

CN23 CN21CN24

3

RED

R04

2

LINE

FILTER

CN08

21 43

HA JEM-A

TERMINAL

BLOCK

GRN & YEL

DB01R05

C03

INDOOR

UNIT

DC5V

DC12V

OUTDOOR

UNIT

CN10

6

(WHI)

1

1

3

3

4

4

5

5

66

5

CN07
(WHI)

1

1

2

2

CIRCUIT

3

3

4

4

POWER SUPPLY

5

5

FAN MOTOR

RED

BLK
WHI

DC MOTOR
YEL
BLU

WHI

1

YEL
YEL
YEL
YEL

1

2

2

3

3

4

4

5

5

LOUVER MOTOR

T a ble 4-1-1 Simple check for failure diagnosis

Check items

OPERATION indicator

1

Terminal block

2

Fuse 3.15A

3

DC 5V

4

DC 12V

5

DC 325V

6

(DC310 to 340V)

Check to see if the OPERATION indicator goes on and off when the main switch or
breaker is turned on.
(Check the primary and secondary voltage of the transformer.)

Check the power supply voltage between  and . (Refer to the name plate.)
(Check the primary and secondary voltage of the transformer.)
Check the fluctuating voltage between

Check to see if the fuse blows out.
(Check the R04 of the varistor.)

Check the voltage at the No.4 pin on CN13 connector of the infrared receiver.
(Check the transformer and the power supply circuit of the rated voltage.)

Check for voltage at the white lead of the louver motor.
(Check the transformer and the power supply circuit of the rated voltage.)

Check for voltage at the No.1 pin on CN10 connector.
(Check the DB01, R05 and C03.)

Refer to the service data for the detailed failure diagnosis.

– 15 –

Diagnosis result

 and . (DC 15 to 60V)

4-2. Outdoor Unit

RAS-13UAV-E

PULSE

MODULATING

VAL VE

TE

THERMOSTAT
FOR
COMPRESSOR

121

2

121

2

REACTOR

ORN

P10

G

E
A

CONVERTER

MODULE

DB01

BRW

BU
EU

BV
EV
BW
EW
BX

IGBT MODULE

BY
BZ

Q200

BLU P18

112

2

CN600
CN500

P07
P08

P09

P19
P20

P17

TD

11223

CT

POEWR RELA Y

ELECTRONIC
STARTER

P.C. BOARD

(MCC-813)

P21
P22
P23

3

TO

RED

WHI
BLK

TS

112

2

C12 C13 C14

1

1

2

2

3

3

COMPRESSOR

11223311223

CN701

RELAY

CM

COIL for
4-WAY VALVE

3

BLK
P06 CN703CN603CN602CN601

V ARIST OR

Q300

WHI

112

SURGE
ABSORBER

F04
FUSE
T3.15A

PMV

YEL

ORN

BLU

RED

GRY

3

44556

2

3

F01

FUSE

T25A

RED : RED ORN : ORANGE
WHI : WHITE PUR : PURPUL
BLK : BLACK YEL : YELLOW
BLU : BLUE GRY : GRY
BRW: BROWN PNK : PINK

6

P01

BLK
ORN

P03

WHI

P02

P11
P12

P13

P14

CN300

CN301

IGBT : Insulated Gate Bipolar Transistor

COLOR IDENTIFICATIONBLU

121

1

1

2

2

3

3

1

1

2

2

3

3

4

4

5

5

N

L
3
2
1

2

REACTOR

PUR

RED
WHI
BLK

YEL

PNK
GRY

F AN MOTER

FM

POWER
SUPPLY
220-240V~
50/60Hz

TO
INDOOR
UNIT

– 16 –

5-1. Indoor Unit

RAS-13UKV-E

5. SPECIFICATIONS OF ELECTRICAL PARTS

No.

1

Fan motor (for indoor)

2

Thermo. sensor (TA-sensor)

3

DC-DC transformer (T01)

4

Microcomputer
Heat exchanger temp. sensor

5

(TC-sensor)

6

Line filter (L01)

7

Diode (DB01)

8

Capacitor (C03)

9

Fuse (F01)

10

Power supply IC (IC01)

11

Varistor (R21, R109)

12

Resistor (R01)

13

Louver motor

Parts name

5-2. Outdoor Unit

RAS-13UAV-E

Type

ICF-340-30-2

( – )

SWT-70

µPD780024AGK

( – )

SS11V-06270

D3SBA60

KMH450VNSN120M25C

FCU 250V, 3.15A

STR-L472

15G561K

RF-5TK4R7

MP24GA

Specifications

DC340V, 30W
10kΩ at 25°C
DC390V, Secondary DC15V, 12V, 7V

10kΩ at 25°C

27mH, AC0.6A
4A, 600V
120µF, 450V
T3.15A, 250V

560V

4.7Ω, 5W
Output (Rated) 1W, 16poles, 1phase DC12V

No.

SC coil

1

(Noise filter)

2

DC-DC transformer

3

Reactor

4

Outside fan motor
Suction temp. sensor

5

(TS sensor)
Discharge temp. sensor

6

(TD sensor)
Outside air temp. sensor

7

(TO sensor)
Heat exchanger temp. sensor

8

(TE sensor)

9

Terminal block (6P)

10

Fuse

11

Electrolytic capacitor

12

Transistor module

Parts name

L03
L01

Model name

ADR2520-R15TB
ADR2516-0R6TB

SWT-43

CH-38

ICF-140-43-1

(Inverter attached)

(Inverter attached)

(Inverter attached)

(Inverter attached)

——

For protection of switching power source

For protection of inverter input overcurrent

LLQ2G501KHUATF , 400LISN500K35F

6MBI25GS-060-01 or 6MBI25GS-060-01A

Rating

15A, 0.6mH
20A, 150µH
Primary side DC280V, Secondary side

7.5V x 1, 13V x 1, 26.5V x 3, 16V x 1, 15V x 1
L=10mH, 16A x 2
DC140V, 43W

10kΩ (25°C)

62kΩ (20°C)

10kΩ (25°C)

10kΩ (25°C)

20A, AC250V

3.15A, AC250V
25A, AC250V
500µF, DC400V X 3 pieces
25A, 600V

13

Compressor

14

Compressor thermo.

15

Converter module

DA91A1F-44F

US-622KXTMQO-SS

MP7003

– 17 –

3-phases 4-poles 750W
OFF: 125 ± 4°C, ON: 90 ± 5° C
Diode: 25A, 600V, IGBT: 40A, 600V

6. REFRIGERANT CYCLE DIAGRAM

6-1. Refrigerant Cycle Diagram

RAS-13UKV-E/RAS-13UAV-E

P

Pressure measurement
Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe

Outer dia. : 9.52mm
Thickness : 0.8mm

INDOOR UNIT

Indoor heat

exchanger

Cross flow fan

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

Sectional shape
of heat insulator

T1

Temp. measurement

Allowable height

difference : 10m

Allowable pipe length

Max. : 15m

4-way valve
(CHV-0213)

TS

Temp. measurement

T2

Muffler

Muffler

TD

Compressor
DA91A1F-44F

Outdoor heat

exchanger

Propeller fan

OUTDOOR UNIT

TO

Split capillary

Ø1.5 x 200
Ø1.5 x 200

TE

Strainer

Pulse modulating
valve at liquid side
(SEV15RC2)

Refrigerant amount : 0.8kg

NOTE :

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

NOTE :

• The maximum pipe length of this air conditioner is 15 m. The additional charging of refrigerant is unnecessary
because this air conditioner is designed with charge-less specification.

– 18 –

6-2. Operation Data

<Cooling>

Temperature

condition (°C)

Indoor Outdoor

27/19 35/–

Model

name

13UKV-E

Standard

pressure

P (MPa)

0.8 to 1.0

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

9 to 11 49 to 50

Indoor fan

mode

High

Outdoor fan

mode

High

Compressor

revolution

<Heating>

Temperature

condition (°C)

Indoor Outdoor

20/– 7/6

Model

name

13UKV-E

Standard

pressure

P (MPa)

2.5 to 2.7

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

42 to 44 0 to 3

Indoor fan

mode

High

Outdoor fan

mode

High

Compressor

revolution

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

(rps)

77

(rps)

83

– 19 –

7-1. Indoor Unit

RAS-13UKV-E

Heat Exchanger Sensor

7. CONTROL BLOCK DIAGRAM

Indoor Unit Control Panel

M.C.U

Functions

Powerful

Display

Temperature Sensor

Infrared Rays Signal Receiver

Infrared

Rays

Initializing Circuit

36.7kHz

Clock Frequency

Oscillator Circuit

Power Supply

Remote

Controller

Noise Filter

From Outdoor Unit

Circuit

• Louver Control

• 3-minute Delay at Restart for Compressor

• Motor Revolution Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

Louver ON/OFF Signal

Louver Driver

Serial Signal Transmitter/Receiver

Serial Signal Communication

Operation

Display

Timer

Display

Filter

Sign Display

PRE DEF.

Sign Display

Indoor

Fan Motor

Louver

Motor

REMOTE CONTROLLER

Infrared

Rays

Remote Controller

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

ECO

Hi-POWER

– 20 –

RAS-13UAV-E

7-2. Outdoor Unit (Inverter Assembly)

For INDOOR UNIT

220–230–240 V

to 50/60 Hz

MICRO-COMPUTER BLOCK DIAGRAM

MCC813 (P.C.B) OUTDOOR UNIT

Inddor unit

send/receive

circuit

M.C.U

• PWM synthesis function

• Input current release control

Discharge

temp. sensor

• IGBT over-current detect control

• Outdoor fan control

• High power factor correction control

Outdoor air

temp. sensor

– 21 –

Suction temp.

sensor

• Inverter output frequency control

• A/D converter function

• P.M.V. control

• Discharge temp. control

• 4-way valve control

Heat exchanger

temp.sensor

• Signal communication to indoor unit

Rotor position

detect circuit

Rotor position

detect circuit

Gate drive

circuit

Gate drive

circuit

Over current
detect circuit

Over current

sensor

Noise

Filter

High Power

factor Correction

circuit

Input current

sensor

Driver circuit

of P.M.V.

P.M.V.

Clock

frequency

16MHz

Converter

(AC DC)

Relay
circuit

4-way

valve

Over current

sensor

Over current

sensor

Inverter

(DC AC)

Inverter

(DC

AC)

P.M.V : Pulse Modulating Valve
M.C.U : Micro Control Unit

Outdoor

Fan motor

Compressor

8. OPERATION DESCRIPTION

8-1. 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 in the range from 13 to 110 rps is
mounted. The DC motor drive circuit is mounted to
the indoor unit. The compressor and the inverter to
control fan motor are mounted to the outdoor unit.

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

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

The outdoor unit controller receives operation
command from the indoor unit side, and controls the
outdoor fan and the pulse modulating valve. (P.M.V)
Besides, detecting rev olution position of the com­pressor motor, the outdoor unit controller controls
speed of the compressor motor by controlling output
voltage of the inv erter 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 re versely
the operating status information of the outdoor unit
to control the indoor unit controller.

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

(1) Role of indoor unit controller

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

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

• Temperature setting of the indoor heat ex­changer by using heat exchanger sensor
(TC sensor) (Prevent-freezing control)

• 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 controller, the outdoor
unit performs its role.

• Compressor operation
control

• Operation control of
outdoor fan motor

• P.M.V . control

• Detection of inverter input current and current

release operation

• Over-current detection and prevention oper a­tion 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 to indoor unit

• Detection of outdoor temperature and opera­tion revolution control

• Defrost control in heating operation (Temp.
measurement by outdoor heat exchanger and
control for four-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 control

• 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.)

• For these two types of signals ( [Operation
mode] and [Compressor revolution] ), the
outdoor unit controller monitors the input
current to the inverter, and perfo rms the
followed operation within the range that current
does not exceed the allowable value.

• Temperature of indoor heat exchanger by
indoor heat exchanger sensor
(Minimum revolution control)

Operations follow ed



to judgment of serial
signal from indoor



side.



– 22 –

(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 transf erring 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.

8-1-2. Current Release Control

The outdoor main circuit control section (Inverter
assembly) detects the input current to the outdoor
unit. If the current value with compressor motor
speed instructed from indoor side exceeds the
specified value, the outdoor main circuit control
section controls compressor motor speed by reduc­ing motor speed so that value becomes closest to
the command within the limited value.

8-1-3. Power Factor Improvement Control

Po w er factor improvement control is performed
mainly aiming to reduce the current on much power
consumption of cooling/heating operation. Control­ling starts from the time when input power has
reached at a certain point. To be concrete, IGBT of
the power factor impro vement circuit is used, and
the power factor is improved by keeping IGBT on f or
an arbitrary period to widen electro-angle of the
input current.

8-1-1. Capacity Control

The cooling and heating capacity is varied by
changing compressor motor speed. The inverter
changes compressor motor speed by changing AC
220–230–240V power to DC once, and controls
capacity by changing supply power status to the
compressor with transistor module (includes 6
transistors). The outline of the control is as follows:
The revolution position and re volution speed of the
motor are detected by detecting winding electromo­tive force of the compressor motor under operation,
and the revolution speed is changed so that the
motor drives based upon revolution speed of the
operation command by changing timing (current
transfer timing) to exchange in verter output voltage
and supply power winding.

Detection of the revolution position f or controlling is
performed 12 times per 1 revolution of compressor.

The range of supply power frequency to the com­pressor differs according to the operation status
(COOL, HEAT, DRY).

Table 8-1-1 Compressor revolution range

Operation

mode

COOL

HEAT

Model

name

13UKV-E

Compressor

revolution (rps)

13 to 88

16 to 110

8-1-4. Prevent-Freezing Control

The indoor heat exchanger sensor detects refriger­ant vapor temperature in COOL/DR Y operation.
If the temperature is below the specified value ,
compressor motor speed is reduced so that opera­tion is performed in temperature below the specified
value to prev ent-freezing of indoor heat exchanger.

8-1-5. P. M. V. (Pulse Modulating Valve)

Using P.M.V., refrigerant flow of refrigeration cycle is
varied for the optimum temperature.

After the power has been turned on, when a serial
operation signal is received from indoor at the first
time, or when PMV alarm is detected and the
equipment is reactivated, move the valve once until
it hits on the stopper for positioning of the valve.
In this case, ticktack sound may be heard.

8-1-6. Louver Control

(1) V e rtical air flow louvers

Positions of v ertical air flow louvers are auto­matically controlled according to the operation

status (AUTO : A , COOL : , DRY : ,
HEAT : , FAN ONLY : ). Besides, positions

of vertical air flow louvers can be arbitrarily set
by pushing the [FIX] button.

(2) Swing

If the [SWING] button is pushed during running
operation, vertical air flow louvers start swinging.
When the [FIX] button is pushed, swinging stops.

– 23 –

8-1-7. Indoor Fan Control (DC Fan Motor)

(1) The indoor fan is operated by the stepless speed

change DC motor.

(2) For air flow level, speed of the indoor fan motor

is controlled in five steps (LOW, LOW+, MED ,
MED+ and HIGH). If AUTO mode is selected,
the fan motor speed is automatically controlled
by the difference between the preset tempera­ture and the room temperature.

LOW+= LOW + MED

2

MED+= MED + HIGH

Operation

mode

COOL

DRY

HEAT

T ab le 8-1-2

Fan

mode

H
M

L

—

H
M

L

RAS-13UKV-E

Motor speed Air flow rate

(rpm) (m³/h)

1210 530
1010 420

810 330

780 320
1290 620
1110 470

930 380

2

8-1-8. Outdoor Fan Control (DC Fan Motor)

Although the outdoor fan motor drives the outdoor fan by non-step variable system of the re volution speed, the
revolution speed is restricted to three steps on the convenience of controlling. If a strong wind is lashing outside
of the room, the operation may be continued as the outdoor f an stops in order to protect the outdoor fan motor.

If a fan lock occurred due to entering of foreign matter, the air conditioner stops and an alarm is displayed.

<COOL, DRY>

Model name

Compressor revolution (rps)

TO ≥ 38°C

Outdoor temp. sensor TO TO < 38°C

TO < 15°C

TO ≥ 38°C

ECONO. operation TO < 38°C

TO < 15°C

TO is abnormal

<HEAT>

Model name

Compressor revolution (rps)

Outdoor temp. sensor TO

ECONO. operation

TO is abnormal

TO ≥ 5°C
TO < 5°C
TO ≥ 5°C
TO < 5°C

T a ble 8-1-3

RAS-13UAV-E

To 13.8 To 34.7 From 35.3

390 840 840
390 700 840

390
390 700 840
390 390 700

390
700 700 840

T a ble 8-1-4

RAS-13UAV-E

To 16.8 To 57.4 From 58.0

390 650 840
650 650 840
390 390 650
390 650 650
390 650 840

– 24 –