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 –

8-2. Description of Operation Circuit

• Turning [ON] the breaker flashes the operation
lamp. (1Hz)

This is the display of power-ON (or notification of
power failure).

• When pushing [START/STOP] b utton of the remote
controller, receive sound is issued from the main
unit, and the next operations are perf ormed
together with opening the vertical air flow louvers.

8-2-1. Cooling Operation

(The Remote Controller MODE Button
is Set to the COOL

• Once the setting is made, the operation mode is
memorized in the microcomputer so that the same
operation can be effected thereafter simply by
pushing [START/STOP] button.

• A cooling operation signal is transmitted to outdoor
unit.

• The outdoor unit controls the outdoor fan relay
R01, R02 and R03, and the compressor motor
speed according to the operation command signal
sent from the indoor unit.

• When [FAN] button is set to AUTO, the indoor fan
motor operates as shown in Fig. 8-2-1. When
[FAN] button is set to LOW , LOW+ ,

MED , MED+
operates with a constant air flow.

or HIGH , the motor

Position)

(1) Cooling capacity control

• The cooling capacity and room temperature
are controlled by changing the compressor
motor speed according to both the difference
between the temperature detected by the room
temperature sensor and the temperature set

by TEMP

button and also any change in

room temperature.

• When compressor has been activated or
reactivated, it operates with Max. 41 rps for 2
minutes, with Max. 91 rps from 2 minute to 3
minutes, and with Max. 88 rps after 3 minutes
passed.

• When room temperature is lower than set
temperature, indoor fan motor is oper ated at
fan speed L as shown in Fig. 8-2-1 while the
outdoor unit stops.

(2) Prevent-freezing control

If temperature of indoor heat exchanger de­tected by the indoor heat exchanger sensor is
5°C or lower, compressor motor speed is
gradually lowered to prevent freezing of the
indoor heat exchanger. If temperature is 7°C or
higher, return the operation to the above item
(1).

(3) Current release control

The input current of compressor and outdoor fan
motor (Precisely inverter main circuit control
section) which occupy most of air conditioner
input is detected by the outdoor current sensor,
and compressor motor speed is gradually
lowered so that current value does not exceed

9.0A if current value exceeds 9.0A. When the

current value lowers to 8.5A, return the opera­tion to the above item (1).

˚C

+3

M+
*1
*1
*1

L

In normal
operation

Set
temp.

+2.5
+2
+1.5
+1

(Room temp.) – (Set temp.)

+0.5
0
–0.5

NOTE :

1: Calculated from difference in motor speed of

*

M+ and L, and controlled.

Fig. 8-2-1 Setting of air flow [F an AUTO]

– 25 –

9.0

8.5

Current value (A)

Comp. motor
speed down

Comp. motor
speed keep

Normal control

Fig. 8-2-2

Zone

Operation stop zone
Normal down zone

of motor speed
Slow down of

motor speed

Keep zone :
Motor speed is not changed.

Slow-up zone of motor speed

Normal operation zone

F

117

TD

(˚C)

112

108

105

98

E

D

C

B

A

Release of
motor speed

(4) Limit for maximum compressor motor speed

by indoor fan speed

When outdoor temperature sensor detected
32°C or lower , and indoor heat exchanger
sensor detected 17°C or lower , the maximum
compressor motor speed is limited by the indoor
fan speed.

For e xample, the compressor motor speed is
limited as described in the table below.

T a ble 8-2-1

6) Control 6 (F zone) : Operation stop zone

If TD detect value exceeds 117°C during
operation, stop the operation immediately.

Then, restart the operation when TD detect
value becomes 105°C or lower.

Air flow rate

HIGH

M+
MED.
L–, L

UL, SUL

(5) Louver control

The vertical air flow louvers are automatically set
to horizontal or cool memory position.

When temperature of indoor heat exchanger
becomes 5°C or lower by the pre vent-freezing
control and the compressor is turned off, the
vertical air flow louvers close once and then
return to the position of previous time.

(6) Discharge temperature control

(Common control to cooling and heating)

The discharge temperature of refrigerant gas
from the compressor is detected by the dis­charge temperature sensor , and controls operat­ing compressor motor speed.

1) Control 1 (A zone) : Normal operation zone
When TD detect value is 98°C or lower, the

operation is performed with operating motor
speed instructed by the serial signal.

2) Control 2 (B zone) : Slow-up zone of motor
speed

When TD detect value is 98°C or higher,
operating motor speed is slowly up.

3) Control 3 (C zone) : Keep zone
When TD detect value is 105°C or higher,

operating motor speed is not changed if
raising operation speed.

4) Control 4 (D zone) : Slow down zone of motor
speed

When TD detect value is 108°C or higher,
operating motor speed is slowly down.

5) Control 5 (E zone) : Normal down of motor
speed

When TD detect value is 112°C or higher,
operating motor speed is down.

RAS-13UKV-E

(rps)

77
65
53
30
30

rps : round per second

Fig. 8-2-3 Compressor motor speed control

(7) ECO operation control

When the ECO button of the remote controller is
pushed, quiet and mild operation is performed by
restraining air flow and operating motor speed.

1) Indoor air flow is controlled between SUL
and L.

2) The set temperature increases 0.5°C per 1
hour up to +2°C starting from the set tem­perature when ECO mode has been re­ceived.

TA [˚C]

+4.0
+3.5
+3.0
+2.5
+2.0
+1.5
+1.0
+0.5

Tsc

–0.5
–1.0

–2.0

– 26 –

Fig. 8-2-4

rps FAN

40
35
31
27
22
18
13

OFF

L–

UL

SUL

L

8-2-2. DRY Operation

(The Remote Controller MODE Button
is Set to the DRY

• Once the setting is made, the operation mode is
memorized in the microcomputer so that the same
operation can be effected thereafter simply by
pushing [START/STOP] button.

• Dry operation signal is transmitted to outdoor unit.

• The Cooling operation giving priority to dehumidi-

fying, which restrains the indoor fan speed and
compressor motor speed, is performed.

• The indoor fan motor operates as shown in Fig. 8­2-5. (Fan speed is AUTO only.)

• The outdoor fan motor operates as described in
Table 8-1-3, and the compressor motor speed
according to the operation command signal sent
from the indoor unit.

+2.5

+2.0

+1.5

Position)

L–

*1

[Basic control]

Set
temp.

(Room temp.) –

0

–0.5
–1
–1.5
–2

(Set temp.)

–5.0
–5.5

[FAN AUTO]

LOW

1

*

2

*

M+

HIGH

*1, *2 : Approximate revolution speed of M+ and L to
linear according to temperature.

Fig. 8-2-6 Setting of air flow

[Cold draft preventing control]

The upper limit of fan revolution speed is shown
below.

+1.0

SUL

+0.5

(Room temp.) – (Set temp.)

Set
temp.

0

–0.5

NOTE :

*1 : Middle motor speed between L – and SUL

Fig. 8-2-5 Setting of air flow

8-2-3. Heating Operation

Transferring of heating operation signal from indoor
unit to outdoor unit starts.

The indoor fan motor operates by the room temper a­ture when selecting “AUTO” of “FAN” as shown in
Fig. 8-2-6, and operates with a set air flow when

selecting “Low ” to “High ”.
However, to prev ent cold draft, revolution speed of

the fan is restricted by indoor heat exchanger when
air flow is A UTO (Fig. 8-2-7) and starting of FAN
Manual.

44
43

31
30

A + 4
A – 8

FAN

AUTO

33
32

20
19

2

*

A

A – 8

Starting
of FAN
Manual

HIGH

Approximate
revolution speed
of HIGH and SUL
linear by Tc.

*

SUL

( NOTE : *1)

SUL

Stop

Fig. 8-2-7 Cold draft preventing control

NOTES :

(1) Stops for 2 minutes after thermostat-OFF.
(2) 24°C when the set temp. is 24°C or more

Set temp. when the set temp. is belo w 24 °C

(3) SUL : Super ultra lo w

3

[In starting and in stability]

• Until 12 minutes passed after operation start

FAN AUTO

FAN Manual

• 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

In starting

In stability

• 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

– 27 –

The outdoor unit controls the outdoor fan based
upon the operation signal sent from the indoor unit,
and also controls revolution speed of the compres­sor motor.

The power coupler (IC20) for four-way v alve is
turned on, and turned off in defrost operation.

(1) Heating capacity control

Calculate the difference between temperature
detected by room temp. sensor every minute and
the set temp. set on “Temp. indicator” and
variation amount of room temp.

Then, obtain the correction amount of the
command signal, and correct the current fre­quency command signal.

(2) High-temp. release contr ol

If temperature of the indoor heat exchanger
detected by the indoor heat exchanger sensor is
55°C or higher, compressor motor speed is
gradually lowered to prevent over-temp. rising of
compressed pressure.

If temperature becomes below 48°C, return to
above item (1).

(3) Current release control

The input current of compressor and outdoor fan
motor (Precisely inverter main circuit control
section) which occupy most of air conditioner
input is detected by the outdoor current sensor.
The compressor motor speed is lowered gradu­ally according to the range of TO (outside air
temp.) if the input current e xceeds the current
value determined in each zone as shown in Fig.
8-2-8 so that the input current does not exceed
the set value.

In case that the current lowered by approx. 0.5A
than each set value, return to above item (1).

TO

9.8A

10.3A

10.8A

Outside air temp. (˚C)

16.0

15.5

11.0

10.5

Fig. 8-2-8

(4) Defrost control

1) Detection of frost
In heating operation, time duration while the

compressor operates is counted, and defrost
operation starts by any condition described
below.

a. The counted time is 28 minutes or more,

and status that temperature of the outdoor
heat exchanger detected by the outdoor
heat exchanger is –20°C or lower contin­ued for 2 minutes or more.

b. The counted time is 28 minutes or more,

and status that temperature of the outdoor
heat exchanger detected by the outdoor
heat exchanger is –7°C or lower and
temperature lowered by 2.5 °C than the
minimum value of the outdoor heat ex­changer during 10 to 15 minutes count
time continued for 2 minutes or more.

c. The counted time is 34 minutes or more,

and status that temperature of the outdoor
heat exchanger detected by the outdoor
heat exchanger is –5°C or lower and
temperature lowered by 3.0 °C than the
minimum value of the outdoor heat ex­changer during 10 to 15 minutes count
time continued for 2 minutes or more.

d. If the following three conditions are satis-

fied, defrost operation (Timer defrost)
starts after heating operation for 37
minutes.

1) Setting on remote controller, H EAT
(mode), HIGH (Fan), 30°C (temp.) .

2) Room temp. is 19°C to 24°C, and
outside air temp. is 5°C or lower.

3) Defrost operation has been already
performed once.

2) Defrost operation
Operation of the compressor is stopped

once, turn off power coupler for four-way
valve after 10 seconds, and then exchange
the four-wa y v alv e .

After 20 seconds, restart operation of the
compressor. Turn off the outdoor fan just
when the compressor stopped.

If temperature of the indoor heat exchanger
lowered than 38°C , stop the indoor fan.

3) Defrost reset
Resetting operation from defrost to heating is

performed when any one of the fo llo wing
conditions is satisfied.

a. Temperature of the outdoor heat ex-

changer rose to +8°C or higher.

b. A status that temperature of the outdoor

heat exchanger is +5°C or higher contin­ued for 80 seconds.

c. Defrost operation continued for 15 min-

utes.

In resetting defrost operation, the compressor
stops for 50 seconds if defrost has started
under condition a. to c. in item 1), but the
compressor is reset to heating operation
keeping operated if defrost has started under
condition d. in item 1).

(5) Louver control

When the compressor is turned off by high-temp.
release control, the vertical air flow louvers close
once and then return to the position of previous
time.

– 28 –

8-2-4. Automatic Operation

(1) As shown in Fig. 8-2-9, the operation mode

(COOL, DRY, HEAT) is selected according to the
outside temperature and room temperature
when the operation has started.

The operation in Fan mode continues until an
operation mode is selected.

If the room temperature is 20°C or higher when

“AUTO” operation started within 2 hours after
“HEAT” operation had stopped, select an opera-

tion mode after Fan operation of ultra low fan.
In AUTO operation, the set temperature of each

operation can be corrected by the remote
controller in the range of 17 to 30°C.

(2) After selecting the operation mode (COOL, DR Y,

HEAT), select an operation mode again when a
status that the compressor was turned off by the
room temperature or outside air temperature
continues for 15 minutes.

(3) Po werful Cool mode control

When the outside temperature is above 32°C
and indoor temperature is above 28°C , select
Cool mode control. In Cool mode, the air flow
louver directs downward. When the room tem­perature gains access to the set temperature, it
becomes cool memory position.

TA
28

26
24
23

Heating with setting
on remote controller
Ts = 25˚C

20

Ts correction by outside
temperature ( To)

5

–2 –10+1

15 18 24 32 To

8-3. Temporary Operation

• Temporary Auto operation, existence of Auto
Restart, and Temporary Cooling operation can be
set by the TEMPORARY button of the indoor
controller.

Powerful Cooling/Drying with
setting on remote controller
Ts = 25˚C

Cooling/Drying with setting on remote controller
Ts = 25˚C

Monitoring
(Follow to the Fan control in previous
mode when being selected again.)

Fig. 8-2-9

8-3-1. Temporary Auto Operation

• When the TEMPORARY button is pushed, the
Auto operation with set temperature fix ed at 25 °C
starts. Controlling is same as that of Auto opera­tion by the remote controller .

• When the TEMPORAR Y button is pushed again,
the operation stops.

• During T emporary Auto operation, operation by the
remote controller is accepted.

• Using the Auto Restart function, the Temporary
Auto operation starts when power failure is reset.

TEMPORARY button

Fig. 8-3-1

T a ble 8-3-1

TEMPORARY button Control

OFF → ON Temporary Auto operation start

After pushing button

for 3 seconds

After pushing button Temporary Cooling

for 10 seconds operation start

Auto Restart control select

8-3-2. Temporary Cooling Operation

• When the TEMPORARY operation button keeps
pushed for 10 seconds, Cooling operation of which
compressor motor speed and the indoor fan speed
are fixed starts.

Compressor motor speed :

13 : 30 rps

Indoor fan speed : Low

• When the TEMPORARY operation button is
pushed again, the operation stops.

• Auto Restart function is unavailable.

– 29 –

8-4. 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.

• When the unit is standby (Not operating)

8-4-1. 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.
Push the [TEMPORARY] button located in the

center of the front panel 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.

Operation

Push [TEMPORARY] b utton for more
than three seconds.

0

3S

TEMPORARY button

• When the unit is in operation

Operation

Push [TEMPORARY] b utton for more
than three seconds.

Motions

The unit is on standby.

↓

The unit starts to operate. The green lamp is on.

↓ After approx. three seconds,

The unit beeps three times The lamp changes from
and continues to operate. green to orange.

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

Motions

The unit is in operation. The green lamp is on.

↓

The unit stops operating. The green lamp is turned off.

The unit beeps three times.

If the unit is required to operate at this time, push [TEMPORARY]
button once more or use the remote controller to turn it on.

TEMPORARY button

0

3S

• While this function is being set, if the unit is in
operation, the orange lamp is on.

• This function can not be set if the timer operation
has been selected.

↓ After approx. three seconds,

• When the unit is turned on by this function, the
louver will not swing even though it was swinging
automatically before shutting down.

• While the filter check lamp is on, the TEMPORARY
button has the function of filter reset button.

– 30 –

8-4-2. 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.

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

The unit will be required to be turned on with the
remote controller after the main power supply is
turned off.

Operation

Push [TEMPORARY] button for more
than three seconds.

0

3S

TEMPORARY button

• When the system is operating

Operation

Push [TEMPORARY] button for more
than three seconds.

Motions

The unit is on standby.

↓

The unit starts to operate. The orange lamp is on.

↓ After approx. three seconds,

The unit beeps three times The lamp changes from
and continues to operate. orange to green.

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

Motions

The unit is in operation. The orange lamp is on.

↓

The unit stops operating. The orange lamp is turned off.

↓ After approx. three seconds,

The unit beeps three times.

If the unit is required to operate at this time, push [TEMPORARY]
button once more or use the remote controller to turn it on.

TEMPORARY button

0

3S

• While this function is being set, if the unit is in operation, the orange lamp is on.

8-4-3. Power Failure During Timer Operation

When the unit is in timer operation, if it is turned off
because of power failure , the timer operation is
cancelled. Therefore, set the timer operation again.

NOTE :

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

8-5-1. How to Turn Off Filter Check Lamp

Push [FILTER] button on the remote controller .
Or push [TEMPORARY] b utton on the indoor unit.

Then we have to clarify it.

NOTE :

If [TEMPORARY] b utton is pushed while the filter
check lamp is not indicating, the indoor unit will start
the automatic operation.

When you want a temporary operation while the filter

8-5. Filter Check Lamp

When the elapsed time reaches 1000 hours, the

lamp lights, put out the lamp once, and then push
the TEMPORARY button.

filter check lamp indicates. After cleaning the filters,
turn off the filter check lamp.

– 31 –

8-6. Remote Controller and its Fuctions

UT

TIMER

8-6-1. Parts Name of Remote Controller

1

Infrared signal emitter

Transmits a signal to the indoor unit.

2

ST ART/ST OP b utton

Push the button to start operation.
(A receiving beep is heard.)

Push the button again to stop operation.
(A receiving beep is heard.)

If no receiving sound is heard from the indoor unit,
push the button twice.

3

Mode select button (MODE)

Push this button to select a mode.
Each time you push the button, a mode is selected in

a sequence that goes from A : Auto changeover
control,

and back to A. (A receiving beep is heard.)

4

Temperature b utton

.....The set temperature is increased up to 30°C.

.....The set temperature is dropped down to 17°C.

5

Fan speed button (FAN)

Push this button to select fan speed. When you
select AUTO, the f an speed is automatically adjusted
according to the room temperature.

You can also manually select the desired fan speed
from among five settings.
(LOW
HIGH

6

Auto louver button (SWING)

Push this button to swing the louver.
(A receiving beep is heard.)

Push the FIX button to stop the louver s winging.
(A receiving beep is heard.)

7

Set louver button (FIX)

Push this button to adjust the air flow direction.
(A receiving beep is heard.)

8

Off timer button (OFF)

Push this button to set the OFF timer.

9

On timer button (ON)

Push this button to set the ON timer.

10

Reserve button (SET)

Push this button to reserve
time settings.
(A receiving beep is heard.)

: Cool, : Dry, : Heat, : Fan only ,

(A receiving beep is heard.)

, LOW+ , MED , MED+ ,

) (A receiving beep is heard.)

2

4

5

6

7

9

8

16

11

Cancel button (CLR)

Push this button to cancel ON timer and OFF timer .
(A receiving beep is heard.)

12

High power button (Hi-PO WER)

Push this button to start the high power operation.

13

Memory button (MEMO)

Keep pushing the MEMO b utton for 2 seconds from
the beginning, or keep pushing the button for 2
seconds after pushing it once for a short time. Then
the set data is stored in the memory and
displayed.

14

Automatic operation button (AUTO)

Push this button to operate the air conditioner
automatically.

15

ECO timer button (ECO)

Push this button to start the ECO timer (OFF timer)
operation.

You can select the OFF timer from among four
settings (1, 3, 5 or 9 hours).

16

FIL TER b utton

Push this button to turn off the filter cleaning lamp on
the indoor unit.

Push this button after cleaning the air filter .

17

PRESET button

Push this button to operate the air conditioner
according to settings memorized by the MEMO
button.

18

TIMER button

Use this button to change the clock, ON timer, and
OFF timer times.

To forward the time, push the “TIMER
To set back the time, push the “TIMER

” button.

1

AUTOA

HiPOWER

CHK

AM
PM

ON

P

OFF

C

AM

˚

PM

AUT

O

ST AR T/ST OP

:

:

PRESET

3

MODE AUTOFAN

SWING

ON

ECO

TIMER

OFF SET CLR

FILTER

Hi-POWER

MEMOFIX

RESET CLOCK CHECK

15
13
10

is

P

” button.

17

14
12

11
18

– 32 –

8-6-2. Name and Functions of Indications on Remote Controller

[Display]

All indications, except for cloc k time indication, are indicated b y pushing the START/ST OP b utton.

6

1

T ransmission mark

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

2

Mode display

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

: Fan only)

3

Temperature displa y

Indicates the temperature setting (17°C to 30°C).
When you set the operating mode to

no temperature setting is indicated.

4

Louver operation display

Indicates the louver positioning and operation.
Five selectable positions

Automatic Swing .

5

FAN speed display

Indicates the selected fan speed. AUTO or one of
five fan speed levels (LOW

MED
indicated.

Indicates AUTO when the operating mode is
either AUTO or

: Cool, : D ry, : Heat,

, MED+ , HIGH ) can be

: Dry.

indicates when the

: Fan only,

, , , ,

, LOW+ ,

TIMER and clock time display

The time set for timer operation or clock time is
indicated.

The present time is always indicated except for
TIMER operation.

7

Hi-POWER displa y

Indicates when the Hi-POWER operation starts.
Push the Hi-POWER button to start and push it

again to stop the operation.

P

8

(MEMORY) displa y

Flashes for 4 seconds when the MEMO button is
pushed during operation.

P

mark is indicated when keeping the button
depressed for more than 2 seconds while the
mark is flashing.

Push another button to turn off the mark.

9

ECO TIMER display

Indicates when the ECO TIMER is in operation.
Each time you push the ECO button, the display

changes in the sequence of 1, 3, 5, or 9h.

3

1

2

8

4

AUTOA

AM

:

PM

ON

P

OFF

C

AM

HiPOWER

CHK

AUTO

95

76

˚

PM

:

AUTO

AUTUTO

PM

OFF

:

• In the illustration, all indications are indicated for explanation.
During operation, only the relevant indications will be indicated on the remote controller.

– 33 –

8-7. Hi-POWER Mode

([Hi-POWER] button on the remote
controller is pushed.)

When [Hi-POWER] button is pushed while the indoor
unit is in Auto, Cooling or Heating operation, Hi­POWER mark is indicated on the display of the
remote controller and the unit operates as follows .

(1) Automatic operation

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

(2) Cooling operation

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

• If the difference between the preset tempera­ture and the room temperature is big, the
horizontal louver moves to the Hi-POWER
position automatically. Then when the differ­ence between them gets smaller, the horizon­tal louver returns automatically.

(3) Heating operation

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

• If the deference between the preset tempera­ture and the room temperature is big, the
horizontal louver moves to the Hi-POWER
position automatically. Then when the differ­ence between them gets smaller, the horizon­tal louver returns automatically.

(4) The Hi-POWER mode can not be set in Dry or

Fan only operation

– 34 –

9. INSTALLATION PROCEDURE

9-1. Safety Cautions

CAUTION New Refrigerant Air Conditioner Installation

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

R410A refrigerant is apt to be affected by impurity such as water, oxidizing membrane, and oils because
pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with adoption of the new
refrigerant, refrigerating machine oil has been also changed. Therefore, during installation work, be sure that
water, dust, former refrigerant, or refrigerating machine oil does not enter into the refrigerating cycle of new­refrigerant air conditioner.

To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging
port of the main unit or installation tools are different from those for the conv entional refriger ant. Accordingly,
the exclusive tools are required for the new refrigerant (R410A) as shown below .

For connecting pipes, use new and clean piping materials with high pressure-tight force, which were made
for R410A only, so that water or dust does not enter. Moreover, do not use the existing piping because there
are problems about pressure-tight force and inner impurity in the existing piping.

CAUTION To Disconnect the Appliance from the Main Power Supply

This appliance must be connected to the main power supply by means of a circuit breaker or a switch with a
contact separation of at least 3mm. The installation fuse (25A D type ) must be used for the

power supply line of this air conditioner.

DANGER

• FOR USE BY QUALIFIED PERSONS ONLY.

• TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK. MAKE SURE

ALL POWER SWITCHES ARE OFF. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

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

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

• DO NOT INSTALL NEAR CONCENTRA TIONS OF COMB USTIBLE GAS OR GAS VAPORS.

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

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

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY
CAREFUL NOT TO GET THE SPECIFIED REFRIGERANT (R-22) WITH ANY OTHER GASEOUS BODY
INTO THE REFRIGERATION CYCLE. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT,
THE GAS PRESSURE IN THE REFRIGERATION CYCLE BECOMES ABNORMALLY HIGH AND IT
RESULTINGLY CAUSES BURST OF THE PIPE AND INJURIES ON PERSONS .

• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE INSTALLA­TION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS IS
HEATED BY FIRE OR SOMETHING ELSE, IT CAUSES GENERATION OF POISONOUS GAS.

WARNING

• Never modify this unit by removing any of the safety guards or by by-passing any of the safety interloc k
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.

• Before doing the electrical work, attach an approved plug to the power supply cord. And make sure the
equipment to be earthed.

• Appliance shall be installed in accordance with national wiring regulations.
If you detect any damage, do not install the unit. Contact your Toshiba dealer immediately.

– 35 –

CAUTION

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

• After unpacking the unit, examine it carefully for possible damage.

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

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

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

instructions for proper installation.

Power supply cord of parts of appliance for outdoor use shall be more

For general public use

than polychloroprene sheathed flexible cord (design H07 RN-F), or
cord designation 245 IEC 66. (1.5mm² or more)

9-1-1. Installation Diagram of Indoor and Outdoor Units

For the rear left and left piping

Hook

Hook

170mm

or more

1 Installation

65mm or more

plate

Wall

2 Wireless
remote controller

(Attach to the front panel)

5 Zeolite
filter

8 Flat head
wood screw

4 Remote controller
holder

Before installing the
wireless remote controller

• With the remote controller
cover open, load the batteries
supplied correctly, observing
their polarity.

Wireless

2

remote controller

Cover

3
Batteries

6 Purifying
filter

100mm or

more from wall

200mm or more

As shown in the figure,
hang power cord and
connecting cable downward,
and take out it along piping
connection port.

Air filter

Vinyl tape Apply
after carrying out
a drainage.

50mm or more

from wall

600mm or more

more from wall

Extension drain hose
(Option : RB-821SW)

250mm or

170mm

or more

Shield
pipe

Saddle

Insert the cushion between the indoor
unit and wall, and lift indoor unit for
better operation.

Do not allow the drain hose to get slack.

Cut the piping hole
sloped slightly

Make sure to run the drain hose sloped
downward.

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

Right

Rear right

Bottom right

Rear left

Left

Bottom left

Insulation of refrigerant pipes insulates
the pipes separately, not together.

6 mm thick heat resistin gpolyethylene foam

Fig. 9-1-1

– 36 –

9-1-2. Optional Installation Parts

Part

code

A

B

C

Refrigerant piping
Liquid side : Ø6.35
Gas side : Ø9.52

Pipe insulating material
(Polyethylene foam, 6mm thick)

Putty, PVC tapes

Parts nam

e

Q’ty

Each

one

1

Each

one

9-1-3. Accessory and Installation Parts

Fixing bolt arrangement of outdoor unit

• Secure the outdoor unit with
the fixing bolts and nuts if
the unit is likely to be exposed
to a strong wind.

• Use Ø8 mm or Ø10 mm
anchor bolts and nuts.

• If it is necessary to drain
the defrost water, attach
drain nipple to the bottom
plate of the outdoor unit
before installing it.

310

76

115

Diffuser

Fig. 9-1-2

600

Suction side

Drain hole

Part

No.

1

Installation plate x 1

Wireless

2

remote controller x 1

3

Battery x 2

Remote controller

4

holder x 1

Part name (Q'ty)

Part

No.

5 9

Zeolite filter x 1

6

Purifying filter x 1

Mounting screw

7

Ø4 x 25 x 6

Flat head wood screw

8

Ø3.1 x 16 x 2

Part name (Q'ty)

Part

No.

Drain nipple x 1
(packaged with the outdoor unit)

Others

This model is not equipped with an extention drain
hose.

Option : For the extention drain hose, use an

Part name (Q'ty)

Name

Owner’s manual

Installation manual

optionally available RB-821SW or
commercially available one.

9-1-4. 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

X
X

¡

X

¡

——

¡

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

X

Exclusive for HFC refrigerant.

• 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.

– 37 –

9-2. Indoor Unit

9-2-1. Installation Place

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

• A place where there is no obstacle near the air inlet
and outlet.

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

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

The indoor unit shall be installed as top of the indoor
unit comes to at least 2m height.

Also it must be avoided to put anything on the top of
the indoor unit.

CAUTION

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

• The microprocessor in the indoor unit should not
be too close to r-f noise sources.
(For details, see the owner's manual.)

Remote controller

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

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

• Keep the remote controller 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 controller should be
determined as shown below.

Mounting the Installation Plate

For installation of the indoor unit, use the paper
pattern on the back.

Anchor bolt holes

82.5

62

1

Installation

Pipe holePipe hole

plate

170

85

Hook

Indoor unit

Thread

Hook

Weight

Hook

7

Mounting screw

Fig. 9-2-3

When the installation plate is directly mounted
on the wall

1. Securely fit 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, utilize the anchor bolt holes as
illustrated in the above figure.

3. Install the installation plate horizontally in the wall.

CAUTION

When installing the installation plate with mounting
screw, do not use the anchor bolt hole. Otherwise
the unit may fall down and result in personal injury
and property damage.

2m or more from floor

Remote

controller

(Top view)

Indoor unit

: Axial distance

*

5m

Reception
range

5m

˚

45

˚

45

Remote
controller

7m

*

Indoor unit

(Side view)

7m

75˚

Reception
range

Fig. 9-2-1

9-2-2. Cutting a Hole and Mounting

Installation Plate

Cutting a Hole

When install the refrigerant pipes from the rear.

Pipe hole

The center of the pipe
hole is above the arrow.

Fig. 9-2-2

1. After determining the pipe hole position on the
mounting plate (

), drill the pipe hole (Ø65 mm) at

a slight downward slant to the outdoor side.

NOTE :

• When drilling the wall that contains a metal lath, wire

lath or metal plate, be sure to use a pipe hole brim
ring sold separately.

Ø65mm

100mm

Anchor bolt

Projection
15mm or less

Fig. 9-2-4

5 mm dia. hole

7 Mounting screw
Ø4 x 25

Clip anchor
(local parts)

Fig. 9-2-5

CAUTION

Failure to firmly 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 dia. holes in the wall.

• Insert clip anchors for appropriate
screws.

NOTE :

• Install the installation plate using 4 to 6 pieces of
mounting screw securing four corners with screws.

mounting



– 38 –

9-2-3. 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.

NOTE :

• Wire type : More than H07RN-F or 245IEC66

(1.0mm² or more)

CAUTION

• This appliance can be connected to the mains in
either of the following two ways.

(1) Connection to fixed wiring :

A switch or circuit breaker which disconnects
all poles and has a contact separation of at
least 3 mm must be incorporate in the fixed
wiring.
An approved circuit breaker or switches must
be used.

(2) Connection with power supply plug :

Attach power supply plug with power cord
and plug it into wall outlet. An approved
power supply cord and plug must be used.

Terminal block

Earth line

Connecting cable

Earth line

Connecting
cable

about 15 cm

Terminal cover

Screw

Screw

10mm

10mm

3

2
1

Cord clamp

Screw

Fig. 9-2-6

80mm

70mm

10 mm

50 mm

NOTE : WIRE TYPE : more than H07 RN-F or

245 IEC 66. (1.0mm² or more)

Fig. 9-2-7 Stripping length of connecting cable

NOTE :

• Perform wiring works so as to allow a generous
wiring capacity.

9-2-4. Wiring Connection

How to connect the connecting cable

Wiring of the connecting cable can be carried out
without removing the front panel.

1. Remove the air inlet grille.

Open the air inlet grille upward and pull it toward
you.

2. Remove the terminal cover and cord clamp.

3. Insert the connecting cable (according to the local

cords) into the pipe hole on the wall.

4. Take out the connecting cable through the cable slot

on the rear panel so that it protrudes about 15cm
from the front.

5. Insert the connecting cable fully into the terminal

block and secure it tightly with screws.

6. Tightening torque : 1.2 N•m (12 kgf•cm)

7. Secure the connecting cable with the cord clamp.

8. Fix the terminal cover, rear plate bushing and air

inlet grille on the indoor unit.

CAUTION

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

• Check local electrical cords and also any specific
wiring instructions or limitations.

9-2-5. Piping and Drain Hose Installation

Piping and drain hose forming

• Since dewing results in a machine trouble, make
sure to insulate both the connecting pipes.
(Use polyethylene foam as insulating material.)

Rear right
Rear left
Bottom left

Changing

Left
Bottom right

Die-cutting

Right

Front panel slit

Fig. 9-2-8

1. Die-cutting front panel slit

Cut out the slit on the left or right side of the front
panel for the left or right connection and the slit on
the bottom left or right side of the front panel for the
bottom left or right connection with a pair of nippers.

2. Changing drain hose

For left connection, left bottom connection and rear
left connection’s piping, it is necessary to change
the drain hose and drain cap.

How to remove the Drain Cap

Clip drain cap by needle-nose plier, and pull out.

drain hose

Piping preparation

– 39 –

Fig. 9-2-9

How to install the Drain Cap

Firmly insert drain hose connecting part unit hitting on
a heat insulator.

Heat insulator

Left-hand connection with piping

Bend the connecting pipe so that it is laid within 43mm
above the wall surface. If the connecting pipe is laid
exceeding 43mm above the wall surface, the indoor
unit may unstably be set on the wall. When bending
the connecting pipe, make sure to use a spring bender
so as not to crush the pipe.

Drain hose

Fig. 9-2-10

How to fix the Drain Cap

1) Insert hexagonal wrench (Ø4mm) in a center head.

Ø4mm

Fig. 9-2-11

2) Firmly inser t drain cap.

No gap

Do not apply lubricating oil
(refrigerant machine oil) when
inserting the drain cap.
Application causes deterioration

Insert a hexagon
wrench (Ø4mm)

and drain leakage of the plug.

Fig. 9-2-12

Bend the connection pipe within a radius of
30mm (Ø6.35), 40mm (Ø9.52).

To connect the pipe after installation of the unit (figure)

(To the forefront of flare)

Outward form
of indoor unit

43mm

270mm

170mm

R 30mm or less (Ø6.35), R 40mm or less (Ø9.52)
(Use polisin (polyethylene core)
or the like for bending pipe.)

80˚

Liquid side

Gas side

Use the handle of screwdriver,etc.

Fig. 9-2-15

NOTE :

If the pipe is bent incorrectly, the indoor unit may
unstably be set on the wall.

After passing the connecting pipe through the pipe
hole,connect the connecting pipe to the auxiliary pipes
and wrap the facing tape around them.

CAUTION

Firmly insert the drain hose and drain cap :
otherwise, water may leak.

In case of right or left piping

• After scribing slits of the front panel with a knife or a
making-off pin, cut them with a pair of nippers or an
equivalent tool.

Slit

Fig. 9-2-13

In case of bottom right or bottom left piping

• After scribing slits of the front panel with a knife or a
marking-off pin, cut them with a pair of nippers or an
equivalent tool.

Slit

Fig. 9-2-14

CAUTION

• Bind the auxiliary pipes (two)and connecting
cable with facing tape tightly.In case of leftward
piping and rear-leftward piping,bind the auxiliary
pipes (two)only with facing tape.

Indoor unit

Auxiliary pipes

Installation plate

Fig. 9-2-16

• Carefully arr ange pipes so that any pipe does
not stick out of the rear plate of the indoor unit.

• Carefully connect the auxiliary pipes and con­necting pipes to each other and cut off the
insulating tape wound on the connecting pipe to
avoid double-taping at the joint,moreover,seal
the joint with the vinyl tape,etc.

• Since dewing results in a machine trouble,make
sure to insulate both the connecting pipes.(Use
polyethylene foam as insulating material.)

• When bending a pipe,carefully do it not to crush
it.

Connecting cable

– 40 –

9-2-6. Indoor Unit Fixing

1. Pass the pipe through the hole in the wall, and hook
the indoor unit on the installation plate at the upper
hooks.

2. Swing the indoor unit to right and left to confirm that
it is firmly hooked up on the installation plate.

3. While pressing the indoor unit onto the wall, hook it
at the lower part on the installation plate. Pull the
indoor unit toward you to confirm that it is firmly
hooked up on the installation plate.

1

2

Hook

Hook here
1

Installation
plate

Push (unhook)

Fig. 9-2-17

• For detaching the indoor unit from the installation

plate, pull the indoor unit toward you while pushing
its bottom up at the specified parts.

PushPush

Fig. 9-2-18

8-2-7. Drainage

1. Run the drain hose sloped downwards.

NOTE :

• Hole should be made at a slight downward slant on

the outdoor side.

Do not rise the drain hose.

50 mm
or more

Do not put the
drain hose end
into water.

Fig. 9-2-19

Do not form the drain hose
into the waved shape.

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

9-3. Outdoor Unit

9-3-1. Installation Place

• A place which provides the spaces around the
outdoor unit as shown in the left 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 users 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.

• An allowable length of the connecting pipe is up to
15m.

• An allowable height level is up to 10 m.

• A place where the drain water does not raise any
problem.

CAUTION

1. Install the outdoor unit without anything blocking
the air discharging.

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

3. Specially in windy areas, install the unit 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 sulfide gas.

• A place where high-frequency waves are likely

to be generated as from audio equipment,
welders, and medical equipment.

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.

Drain hose

Shield pipe

Inside the room

Extension drain hose

Fig. 9-2-20

CAUTION

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

This air conditioner has the
structure designed to drain
water collected from dew,
which forms on the back of the
indoor unit, to the drain pan.
Therefore, do not store the
power cord and other parts at a

Space for
pipes

height above the drain guide. Fig. 9-2-21

Wall

Drain
guide

Strong
wind

Fig. 9-3-1

9-3-2. Refrigerant Piping Connection

Flaring

1. Cut the pipe with a pipe cutter.

90˚

Obliquity Roughness Warp

Fig. 9-3-2

– 41 –

2. Insert a flare nut into the pipe, and flare the pipe.

Compound
pressure
gauge

Pressure gauge

Manifold valve

Handle Hi
(Keep full closed)

Charge hose
(For R410A only)

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

Packed valve at liquid side

Packed valve at gas side
Service port
(Valve core (Setting pin))

Connecting
pipe

Handle Lo

Charge hose
(For R410A only)

-101kPa
(-76cmHg)

Vacuum
pump

• Projection margin in flaring : A (Unit : mm)

Rigid (Clutch type)

Outer dia. of

copper pipe

6.35

9.52

Die Pipe

Fig. 9-3-3

R410A

tool used

0 to 0.5
0 to 0.5

Imperial (Wing nut type)

A

Outer dia. of

copper pipe

6.35

9.52

Conventional

tool used

1.0 to 1.5

1.0 to 1.5

R410A

1.5 to 2.0

1.5 to 2.0

Tightening Connection

Align the centers of the connecting pipes and tighten
the flare nut as far as possible with your fingers. Then
tighten the nut with a spanner and torque wrench as
shown in the figure.

Half union

Externally
threaded side

Use a wrench
to secure.

Flare nut

Internally
threaded side

Use a torque wrench
to secure.

Fig. 9-3-4

CAUTION

• Do not apply excess torque. Otherwise the nut
may crack depending on the conditions.

(Unit : N·m)

Outer dia. of copper pipe

Ø6.35 mm
Ø9.52 mm

Tightening torque

14 to 18 (1.4 to 1.8 kgf•m)
33 to 42 (3.3 to 4.2 kgf•m)

9-3-3. Evacuating

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

AIR PURGE

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

Use a vacuum pump

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

1. Connect the charge hose from the manifold valve to
the service por t of the gas side packed valve.

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

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

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

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

6. Open fully the valve
stem of the packed
valves (both side
of Gas and Liquid).

7. Remove the
charging hose from
the service port.

8. Securely tighten
the caps on the
packed valves.

• Tightening torque for connection of flare pipe

The pressure of R410A ishigher than R22.
(Approx. 1.6 times) Therefore
securely tighten the flare pipes
which connect the outdoor unit
and the indoor unit with the
specified tightening torque using
a torque wrench.
If each flare pipe connects
incorrectly, it may cause not only
a gas leakage but also a trouble
of the refrigeration cycle.

Shaping pipes

1. How to shape the pipes
Shape the pipes along the incused line on the

outdoor unit.

2. How to fit position of the
pipes

Put the edges of the pipes
to the place with a
distance of 85mm from
the incused line.

85mm

Fig. 9-3-6

Fig. 9-3-5

Flare at
indoor
unit side

Flare at
outdoor
unit side

Incused
line

Fig. 9-3-7

CAUTION

• KEEP IMPORTANT 4 POINTS FOR PIPING W ORK

1. Take away dust and moisture
(Inside of the connecting pipes.)

2. Tight connection (between pipes and unit)

3. Evacuate the air in the connecting pipes using
V A CUUM PUMP.

4. Check gas leak (connected points)

Packed Valve Handling Precautions

• Open the valve stem all the way out :
but do not try to open it beyond the stopper.

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

Gas side
(Ø9.52 mm)

Liquid side
(Ø6.35 mm)

Service port

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)

Hexagonal
wrench is
required.

Fig. 9-3-8

4mm

– 42 –

9-3-4. Wiring Connection

Check places for
flare nut connections
(Indoor unit)

Check places
for outdoor unit

Electric parts

V a lve cover

1. Remove the electric parts cover from the outdoor unit.

2. Connect the connecting cable to the terminal as
identified with their respective matched numbers on
the terminal block of indoor and outdoor unit.

3. When connecting the connecting cable to the
outdoor unit terminal, make a loop as shown
installation diagram of indoor and outdoor unit, to
prevent water coming in the outdoor unit.

4. Insulate the unused cords (conductors) with water
coming in the outdoor unit. Process them so that
they do not touch any electrical or metal parts.

Stripping length of connecting cable

9-3-5. Gas Leak Test

NOTE : Connecting cable

• Wire type : More than H07RN-F or 245IEC66

Connecting
cable

Terminal block

Power
cord

10

30

123

10

Connecting cable

40

30

Earth line

10

LN

Fig. 9-3-9

Model

Power source
Maximum running current
Installation fuse rating

Power cord

RAS-13UKV-E

220 – 240 V Single phase

50/60 Hz

11A
25A

(D type

H07RN-F or 245IEC66

(1.5mm² or more)

)

CAUTION

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

• Be sure to comply with local codes on running
the wire from outdoor unit to indoor unit.
(Size of wire and wiring method etc.)

• Every wire must be connected firmly.

• This installation fuse (25A D type
be used for the power supply line of this air
conditioner.

• If incorrect or incomplate 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 fixed wiring : A switch which

disconnects all poles and has contact separa­tion of at least 3mm must be incorporated in the
fixed wiring.

(1.0mm² or more)

) must

10

Power
cord

Fig. 9-3-10

• Check the flare nut connections for the gas leak with

40

a gas leak detector or soap water.

9-3-6. Test Operation

To switch the TEST RUN (COOL) mode, push TEMPO­RARY button for 10 sec.
(The beeper will make a short beep.)

TEMPORARY button

Fig. 9-3-11

9-3-7. 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 was shipped with Auto Restart
function in the off position.
Turn it on as required.

How to Set the Auto Restart

• Press and hold down the TEMPORARY button for
about 3 seconds. After 3 seconds, the electronic
beeper makes three short beeps to tell you the Auto
Restart has been selected.

• To cancel the Auto Restart, follow the steps de­scribed in the section Auto Restart Function of the
Owner’s Manual.

– 43 –

10. HOW TO DIAGNOSE THE TROUBLE

The pulse modulating 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.)

T a ble 10-1

No.

1
2
3
4
5
6

Troubleshooting Procedure

First Confirmation
Primary Judgment
Judgment by Flashing LED of Indoor Unit
Self-Diagnosis by Remote Controller
Judgment of Trouble by Every Symptom
How to Check Simply the Main Par ts

Page

44
45
46
47
50
57

NOTE :

A large-capacity electrolytic capacitor is used in the
outdoor unit controller (inverter). Therefore, if the
power supply is turned off, charge (charging v oltage
DC280V) 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 inv erter cover (plating) by opening

four mounting claws .

(2) As shown below, connect the discharge resis-

tance (approx. 100Ω40W) or plug of the solder­ing iron to voltage between + – terminals of the
C14 (“CAUTION HIGH VOLT A GE 380V” is
indicated.) electrolytic capacitor (500µF/400V)
on P.C. board, and then perform discharging.

Inverter cover

10-1. First Confirmation

10-1-1. Confirmation of Power Supply

Confirm that the power breaker operates (ON)
normally.

Discharging position
(Discharging period
10 seconds or more)

Fig. 10-1

10-1-2. 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.

Plug of
soldering iron

P. C. board
(Soldered surface)

– 44 –

10-1-3. 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 tab le. If a claim is made for running operation, check whether or not it meets to the contents in the
following table . When it does, w e inf orm you that it is not trouble of equipment, but it is indispensable for control­ling and maintaining of air conditioner.

T able 10-1-1

No.

1

2

3

4

Operation of air conditioner

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

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

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

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

Description

The OPERATION lamp 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.

5

The set value of the remote controller
should be below the room temperature.

6

In AUTO mode, the operation mode is
changed.

7

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.

10-2. 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

If the set value is above the room temperature, Cooling
operation is not performed. And chec k whether battery of
the remote controller is consumed or not.

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

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.

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

– 45 –

10-3. 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 b lock on the indoor unit indication section.

T able 10-3-1

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)
PRE DEF. (Orange)
Flashing display (5 Hz)

OPERATION (Green)
TIMER (Yellow)
PRE DEF. (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.

– 46 –

10-4. Self-Diagnosis by Remote Controller (Check Code)

UT

(1) If the lamps are indicated as shown B to H in Table 10-3-1, excute the self-diagnosis by the remote control-

ler.

(2) When the remote controller is set to the service mode, the indoor controller diagnoses the operation condi-

tion and indicate 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
(Pi, Pi, Pi ... ). The timer lamp usually flashes (5Hz) during self-diagnosis.

10-4-1. How to Use Remote Controller in Service Mode

1

Push [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.

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

Push [TIMER ] button

2

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

• • •

AUTOA

HiPOWER

CHK

AUT

SET CLR

RESET CLOCK CHECK

AM

:

PM

ON

P

OFF

C

AM

˚

:

PM

O

PRESET

ST AR T/STOP

MODE AUTOFAN

ECO

TIMER

Hi-POWER

MEMOFIX

RESET CLOCK CHECK

SWING

ON

OFF SET CLR

FILTER

WH-C1PE

Alphanumeric characters are
used for the check codes.

is 5. is 6.
is A. is B.
is C. is D.

• Check the unit with all 35 check codes ( to )
as shown in Table-10-4-1.

• Push [TIMER ] button to change the check code
backward.

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

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

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

• All lamps on the indoor unit will flash.

(5 times per 1 sec.)

Push [START/STOP] button to release the service mode.

3

• The display of the remote controller returns to as it
was before service mode was engaged.

Fig. 10-4-1

– 47 –

10-4-2. Caution at Servicing

(1) After servicing, push the START/STOP 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.

T able 10-4-1

Block distinction

Check

code

Block

Indoor P.C.
board etc.

Not
displayed

Connecting
cable and
serial signal

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)

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.

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.

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 P.C. board.

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

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.

Operation command
signal is not sent to
outdoor side.

Operation
continues

– 48 –

Flashes when
trouble is detected
on Operation
command signal,
and normal status
when signal is
reset.

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.

Block distinction

Check

code

Block

Outdoor P.C.
board

Check

code

Operation of diagnosis function

Cause of operation

Inverter over-current
protective circuit
operates. (Shor t time)

conditioner

All off

Air

status

Remarks

Displayed when
error is detected.

Judgment and action

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

Not
displayed

Outdoor P.C.
board

Others
(including
compressor)

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

Current-detect circuit
error

Being out of place,
disconnection or short­circuit of outdoor temp.
sensor

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

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

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

All off

All off

All off

All off

All off

Operation
continues

All off

Operation
continues

All off

All off

All off

Operation
continues

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.

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. 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 outdoor temp. 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 heat exchanger
temp. sensor (TE).

2. Check P.C. board.

When 20 seconds passed after
start-up, position-detect circuit
error occurred. : Replace compres­sor.

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. Degassing

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 four-valve operation.

– 49 –

10-5. Judgment of Trouble by Every Symptom

10-5-1. Indoor Unit (Including Remote Controller)

(1) Po wer 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

of indoor control

NO

indicated on rear of

Is DC310–340V

supplied to
primary side of
transfer switch?

YES

Are DC15V, 12V

and 7V supplied to

secondary side of

transfer switch?

YES YES

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

NO

Is OPERATION lamp flashing?

YES

Is it possible to turn on

power supply by pushing

[START/STOP] button

on remote controller?

YES YES

Unit operates normally.

Is fuse (F01)

board blown?

NO

Is voltage

(DC12V or 5V)

indoor control
board normal?

NO

NO NO

Turn off breaker once
and turn it on again
after removing motor.

YES YES

Parts (R01, R04, DB01, C01,

C03, IC01 and T01) are defective.

YES

Refer to <Primary check>

or this problem is one step

short of power P.C. board block.

Are DC15V, 12V

and 7V supplied to

secondary side of

transfeor switch?

Does transmission mark

NO NO

on remote controller flash

normally,and is its signal

transmitted properly?

motor connector

between 1 and 2

Microcomputer

Transfer swith,

power supply or

Does fan

short-circuit?

NO

is defective.

IC (IC01) for
fan motor is

defective.

Measures

Item by symptoms

Remote controller is defective.

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

Replace main
P.C. board

Replace motor.

• Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of
damage of the motor.

(2) Po wer is not turned on though Indoor P.C. board is replaced

<Confirmation procedure>

Turn on power supply.

Does operation lamp flash?

NO NO

YES YES

Is wired correctly to white and black

lead wires of terminal block?

Correct wiring.

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

– 50 –

(3) Only the indoor motor fan does not operate

<Primary check>

1. Is it possible to detect the power supply voltage (200–240V) between  and  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 5 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

change airflow level

to “HIGH”?

YES

Is it possible to detect

YES

DC 1V or more between

5

+ and 3 – of

motor connector (CN10).

YES

Is it possible to detect

NO

DC 310–340V between

1 + and 3 – of motor

connector (CN10).

YES

(Motor connection condition)

Is it possible to detect DC 15V

between 4 + and 3 – of

motor connector (CN10).

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 (CN10)?

YES

NO

Is it possible to

rotate cross-flow fan by

hand properly?

YES

NO

NO

Turn off indoor unit and remove
connector from motor.

NO

Then push START/STOP button
on remote cintroller to stop
flashing lamp on indoor unit.

Is it possible to detect

DC 15V between 4 +

and 3 – of motor

connector (CN10).

Turn off indoor unit and

NO

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

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 (CN10)?

within 15 seconds after

5

+ and 3 –

(Check this condition

starting unit.)

NO

YES

YES

NO

NO

Peplace indoor
fan motor.

Peplace main
P.C. board.

Peplace
bearing.

Fan motor
operates normally.

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

5

between

+ and 3 –

of motor connector

(CN10).

YES

NO

– 51 –

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

<Cause>

The IC is built in the indoor fan motor. Theref ore 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 fan motor lead wires.

3. Check DC voltage with CN10 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 2 (GND : BLACK)

and 3 (V line : YELLOW) of motor connector (CN10)

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

CN10

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

– 52 –

(5) Troublechooting for remote controller

Is receiver

on indoor unit

exposed to

direct sunlight?

YES

NO

Is there any

thyristor

fluorescent light

nearby?

YES

NO

Push the START/STOP button.

Is transmission
mark indicated?

YES

Does indoor unit

NO

operate when moving

remote controller

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

Push RESET button
on remote controller
with tip of pencil.

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 START/
STOP button

Is transmission

mark indicated?

YES

Does indoor unit

beep and operate?

YES

Normal

oparation

NO

Remote controller

is defective.

Replace
remote controller.

NOTE : After replacing batteries,

push the RESET button
with a tip of a pencil.

– 53 –

10-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)

(1) Outdoor unit does not operate

1) Is the voltage between  and  of the indoor terminal block varied?
Confirm that transmission from indoor to outdoor is correctly performed based upon the following dia-

gram.

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
2

Terminal block

1

S5277G

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

Tester

Normal time : Voltage swings between DC15 and 60V.
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 pow er will be turned on again.

To item of Compressor 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 10-6.

– 54 –

10-6. 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 modulation valve

(P.M.V.) correctly set?

YES

Is connector of coil connected to inverter?

YES

Is positioning sound of valve (sound hitting to stopper) heard from valve
when the air conditioner starts the operation after turning off power of the
air conditioner once?

NOTE :

After all the operations stopped by the remote controller, the power keeps
being supplied to outdoor unit for approx. 3 minutes. If operating the air
conditioner by remote controller again just after all the operations stopped by the
remote controller, positioning of the valve is not performed when outdoor unit
is activated because supplying power to the outdoor unit is not interrupted.
After positioning of the valve, activate the compressor and the outdoor fan.
It takes approx. 7 seconds for positioning of the valve, and sound ticktack
(hitting sound to stopper) is heard for approx. 0.5 seconds at least of that
period. As the sound is low, check sound by using screwdriver, etc.

YES

Are temp. sensors of indoor/outdoor units correctly set to the holder?
NOTE :
The temperature sensors which are used to control electronic control valve
include indoor heat exchanger sensor (TC), outdoor heat exchanger temp.
sensor (TE), and outdoor suction temp. sensor (TS).

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 (“Pi” sound is heard if keeping pushed for 10 seconds.).
The operation enters temporary operation mode which fixes opening degree of P.M.V. and No. of revolution of
compressor. Check condensation at outlet of P.M.V., 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

– 55 –

Replace valve.

Add gas.

10-7. How to Diagnose Trouble in Outdoor Unit

10-7-1. Summarized Inner Diagnosis of Inverter Assembly

T able 10-7-1

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

Turn “OFF” the power 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.
100Ω40W) or soldering
iron (plug) between +, –
terminals of the electro­lytic capacitor (500µF) 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

CN300 of outdoor fan

NG

tester, check resistance

Replace
outdoor
fan motor.

NO

Does LED on control
board flash or go on?

NO

Remove connector
motor, and using a

value between every
phases at motor side.

OK

YES

CBA

Operation

Measurement

Check

Stop

Check

Measurement

Turn on power breaker, and
operate the air conditioner in
COOL mode by short-circuit
of the timer.

Measure terminal voltage of
the electrolytic capacity.

500µF:400WV x 3

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

• Is not winding between

, -

, or - opened



or short-circuited?

• Is not frame grounded with
, or ?

, 

OK if 500µF

→→

→

→→

DC280 to 380V
Remove CN300 while

pushing the part indicated
by an arrow because CN01
is a connector with lock.

-

→→

→ Resistance between

→→

phases should be approx.
55 to 77Ω

→→

→ Should be 10MΩ or

→→

more.

– 56 –

Diagnosis/Process flowchart Item

Contents

Summary

fan motor

NG

Replace
outdoor
fan
motor.

Check

compressor

winding

resistance.

OK

Replace

control board.

CBA

Check

winding of

compressor.

OK

Check

position

detect

signal.

OK

Replace control
board assembly.

NG

Replace

compressor.

NG

Replace
com­pressor.

Check

Operation

Check

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 breaker, and
perform the operation.
(Stops though activation is
prompted.)

Check operation within 2
minutes 20 seconds after
activation stopped.

<Output check of fan motor
position detect signal>

While connecting connector
5P (CN301) for position
detection, using a tester,
measure voltage between

- . Between  -  : 5V



→ OK if 10MΩ or more



→ OK if 0.51Ω → 0.57Ω



(Check by a digital tester.)



a) One or two of three

voltages should be 5V,
and others should be 0V.
(When all are 0V or 5V, it
is not accepted.)

b) When rotating the fan

slowly with hands, the
voltage between pins
should move from 0V to
5V.
(Check it with an analog
tester.)

10-8. How to Check Simply the Main

Parts

10-8-1. 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 def ectiv e ,
check for disconnection, b urning, or discol­oration of the copper foil pattern or this P.C.
board.

2) The P.C. board consists of the f ollo wing 2
parts

a. Main P.C. board part :

DC power supply circuit (5V, 12V, 15V),
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 .

– 57 –

(3) Check procedures

T able 10-8-1

No.

1

Turn off the power supply 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. If OPERATION lamp
flashes (once per second), it is
not necessary to check steps (1
to 3) in the right next column.

3

Push [START/STOP] button once
to start the unit. (Do not set the
mode to Fan Only or On-Timer
operation.)

4

Shorten the line of the restart
delay timer and start unit.

Procedure

Check points

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

Check power supply voltage :

1. Between TP2 and TP3
(AC 220–240V)

2. Between + and –
(DC 310–340V)

3. Between – of C10 and output
side of IC08 (DC 15V)

4. Between 12V and GND

5. Between 5V and GND

Check power supply voltage :

1. Between CN23 and CN24
(DC 15–60V)

Check whether or not all lamps
(OPERA TION, TIMER, PRE.-DEF .
(or FAN ONLY), Fitered and Hi­Power are indicated for 3 seconds
and they return to normal 3
seconds later.

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 capacitor (C01), line filter (L01),
resistor (R01), or the diode (DB01)
is defective.

3. IC01, IC02 and T01 are defective.

4. IC01, IC02 and T01 are defective.

5. IC01, IC02, IC07 and T01 are
defective.

<Heating and cooling model>
IC03 and IC04 are defective.

The lamps are defective or the housing
assembly (CN13) is defective.

5

Push [START/STOP] button once
to start the unit,

• Shorten the time of 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.

7

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

• Set the operation mode to FAN.

• Set the fan speed level to

HIGH. (The unit (compressor)
operates continuously in the
above condition.)

1. Check whether or not the
compressor operates.

2. Check whether or not the
OPERATION lamp flashes.

1. Check whether or not the
compressor operates.

2. Check whether or not the
OPERATION lamp flashes.

1. Check it is impossible to detect
the voltage (DC 15V) between 3
and 4 of the motor terminals.

2. The motor does not operate.
(But it is possible to receive the
signal from the remote controller.)

3. The motor rotates but vibrates
strongly.

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.)
(CN01)

3. The heat exchanger sensor and the
P.C. board are defective.
(Refer to Table 10-4-1.)

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.
(CN01)

3. The heat exchanger sensor and the
P.C. board are defective.
(Refer to Table 10-4-1.)

4. The main P.C. board is defective

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

2. The connection of the motor
connector is loose.

3. The P.C. board is defective.

– 58 –

100

30

40

50

60

70

80

90

20
10

0

0102030 4050

Resistance value (kW)

Temperature (˚C)

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

TA, TC, TO, TE, TS

TD

10-8-2. P.C. Board Layou t

GND

+12V

+5V

[1] Sensor characteristic table

(For the Top Vie w, refer to page 65.)

Bottom View

– 59 –

10-8-3. Indoor Unit (Other Parts)

No.

1

Room temp. (TA) sensor

Part name

Heat exchanger (TC) sensor

Remote controller

2

Louver motor

3

MP24GA

Indoor fan motor4

Checking procedure

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

Temperature

Sensor

T A, TC (kΩ)

10°C20°C25°C30°C40°C

20.7 12.6 10.0 7.9 4.5

To item of How to judge whether remote controller is good or bad of the
Judgment of trouble by symptom.

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

380 ± 40 Ω

Since judgment of DC motor is difficult on the single motor, refer to
10-5-1. (3)

10-8-4. Outdoor Unit

No.

1

Compressor
(Model : D A91A1F-44F)

2

(Model : ICF-140-43-1)

Compressor thermo. Bimetal

3

type (Model : US­622KXTMQO-SS)

Part name

Checking procedure

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

Red

Position

Resistance value

Red - White

White Black

White - Black

Black - Red

0.51 to 0.57 Ω

Under 20°C

Measure the resistance value of winding by using the tester.Outdoor fan motor

Red

White Black

1 Yellow
4 Pink

5 Gray

Position

Yellow- Pink

Resistance value

5 to 20 kΩ

For details, refer to Section 10-9.

Check conduction by using the tester.

Outdoor temperature sensor

4

(TO), discharge temperature
sensor (TD), suction
temperature sensor (TS),
outdoor heat exchanger
temperature sensor (TE)

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

Temperature

Sensor

TD (kΩ)

10°C20°C30°C40°C50°C

105 64 41 27 18

TGa : Heat pump model only.
TO , TS, TE : Refer to the T A, TC characteristic table in Indoor.

(Refer to 10-8-3, No. 1)

– 60 –

10-8-5. Checking Method for Each Part

No.

1

Part name

Electrolytic capacitor
(For raising pressure,
smoothing)

2

Converter module

Checking procedure

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 sw ollen 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 .

C12 C13 C14

Case that product is good

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

Heat sink IGBT side

MCC-813
Soldered
surface

C12, C13, C14 → 500µF/400V

1. Turn OFF the power supply breaker.

2. Discharge all three capacitors completely.

3. Check that the normal rectification characteristics are shown in continuity
test by the tester.

+ ~ – ~

Diode check IGBT check

Tester rod

+ –
~

1

–

~

2

~

+

E

1

~

2

~

1

~

2

A

E G

21

Resistance value

in good product

50kW or more
(0

in trouble)

+ ~1– ~

Tester rod

+ –
~

2

E

G

~

1

A

~

2

Mark

A

2

Resistance value

in good product

50kW or more

(0

E G

in trouble)

– 61 –

10-9. 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
or

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

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

Turn OFF the breaker.

Disconnect two connectors (CN300 and CN301)

of the outdoor fan motor from the inverter.

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)

1 (Yellow lead) – 4 (Pink lead)

(CN301 : Motor position detection)

of the connector
(CN300 : Motor winding)
is 17 to 25

If the resistance value between

of the connector

is 5k to 20k

Fan motor is normal.

(Outdoor P.C. board error)

, it is normal.

YES

, it is normal.

YES

NO

NO

NO

CN300

CN301

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 ev en if P.C. board is replaced, replace the outdoor f an motor.

– 62 –

11-1. Indoor Unit

11. HOW TO REPLA CE THE MAIN PARTS

No.Part name

Front panel

Electrical part



Procedures

How to remove the front panel

1) Stop the operation of the air conditioner and
turn off its main power supply.

2) Pull the air inlet grille toward you to open it and
remove the air inlet grille.
Then remove 4 screws fixing the front panel.

3) Open the horizontal louver, and then remove the
front panel from the back body by pulling it
toward you.

How to mount the front panel

Mount the front panel in position and make sure
all hooks are locked.

How to remove the electrical part

1) Remove the front panel with the procedure .

2) Remove the screw holding the electrical part
cover.

3) Remove the drain guide.

4) Disconnect connector (6P) for the fan motor and
the connector (5P) for the louver motor from the
P.C. board assembly.

5) Pull out the TC sensor from the sensor holder.

6) Remove each screw for the ground wire, the
electrical part box and the LED unit.
Then remove the LED unit and the electrical
part box from the main unit.

Remarks

2

2

4-Screws

2

3

Drain guide

3

5 TC Sensor

2

2
Screw



Horizontal
louver

How to mount the electrical part

1) Fix the electrical part box by the upper hook of
the back body.

2) Tighten 2 screws of the electrical part box.

3) Connect 3 connectors and arrange the wiring
same as original condition and then tighten the
screw to fix the LED unit to the back body.

4) Attach the TC sensor to the holder.

5) Tighten the screw for the ground wire.

6) Mount the drain guide (the TC sensor wire
should be covered with the drain guide).

7) Tighten the screw of the electrical part cover.

1) Remove the front panel and the electrical part
with the procedure .

2) Remove the center shaft of the horizontal louver
from the back body.

3) Remove the left shaft from the back body.

4) Remove the horizontal louver from the back
body.

Screw

6

Left shaft

3

Screw

2-Connectors

2

6

Center shaft

4

– 63 –

No.

Part name

Procedures

Remarks

T

Heat
exchanger

1) Remove the front panel, electrical part and
the horizontal louver with the procedure S.

2) Remove the pipe holder on the rear side of
the main unit.

3) Remove 2 screws of the heat exchanger on
the base bearing side.

4) Remove 2 screws of the heat exchanger on
the left side (upper and lower) from the back
body, and then pull out the upper side of the
heat exchanger slowly.

Fan motor 1) Remove the front panel and the electrical

U

part with the procedure R.

2) Loosen the set screw of the cross flow fan.

3) Remove 2 screws fixing the motor band (R).

4) Pull out the fan motor.

2 Pipe holder

3

2-Screws

4
2-Screws

Mounting the fan motor as shown in
figure below .

Connector cover

Pull out the lead
wires of the fan motor
from this hole.

Reference line

When mouting the fan motor,
put the R end of the connector
cover this reference line.

Reference
line

– 64 –

No.Part name

4

2-Screws

2 2-Screws (L)

6 Set screw

4

2-Screws
(R)

4.5 mm

Procedures

Remarks

Cross flow
fan

1) Remove the front panel, electrical part, horizon­tal louver and the heat exchanger with the
procedure .

2) Remove 2 screws of the band motor (L) and
other 2 screws of the band motor (R) and then
remove the cross flow fan.

3) Loose the set screw of the cross flow fan then
disconnect the fan and the fan motor.

Notice :

For position of the fan motor connector and drawing
out of the lead cables, refer to the procedure .

Fix the cross flow fan with the set screw at the
position where the gap between the back body and
the right surface of the cross flow fan is 4.5 mm.

Base bearing 1) Remove the front panel, electrical part, horizon-



tal louver, heat exchanger and the cross flow fan
with the procedure .

2) Remove 2 screws fixing the base bearing.

3) Remove the bearing from the base bearing.
If the housing protrudes from the base bearing,
put the housing in position and attach the
bearing to the base bearing.

– 65 –

11-2. Microcomputer

No.



<P.C. board layout>

Part name

Common procedure

Procedure

1) Turn the power supply off to stop the
operation of air-conditioner.

2) Remove the front panel.

• Remove the 4 fixing screws.

3) Remove the electrical part base.

Fuse C01

R04

Remarks

Replace the thermal fuse,
terminal block, microcomputer
ass’y and the P.C. board ass’y.

CN10

RY01

DB01

L01

R05
C03

CN13

IC03
IC02

CN04

T01 IC01 C02 R01

– 66 –

11-3. Outdoor Unit

Table-11-3-1

No.



Part name

Common
procedure

Procedure

1. Detachment

1) Stop operation of the air conditioner, and turn
off the main switch of the breaker f or air condi­tioner.

2) Remove the valve cove r. (ST1TØ4 x 10 1 pc.)

• After removing screw, remove the valve cover

pulling it downward.

3) Remove wiring cover (ST1TØ4 x 10 2 pcs.),
and then remove connecting cab le.

4) Remove the upper cabinet.
(ST1TØ4 x 10 2 pcs.)

• After removing screws, remov e the upper

cabinet pulling it upward.

2. Attachment

1) Attach the upper cabinet.
(ST1TØ4 x 10 2 pcs.)

• Hook the rear side of the upper cabinet to

claw of the rear cabinet, and then put it on the
front cabinet.

2) Perform cabling of connecting cable, and attach
the wiring cover.

• Insert the upper part into the upper cabinet,

insert claw which has been hooked to the
lower part into the square hole, and then fix it

with screw. (ST1TØ4 x 10 1 pc.)

3) Attach the valve cover. (ST1TØ4 x 10 1 pc.)

• Insert the upper part to the upper cabinet, set

hook claw of the valv e cover to square holes
(at three positions) of the main unit, and
attach it pushing upward.

Remarks

Upper cabinet

Wiring
cover

Valve
cover

 Front cabinet

1. Detachment

1) Perform work of item 1 of .

2) Remove screws (ST1TØ4 x 10 2 pcs.) of the
front cabinet and inverter cover and screws

(ST1TØ4 x 10 3 pcs.) of the front cabinet and
lower part.

• The left side of the front is made to insert to

the rear cabinet, so remove it pulling upward.

2. Attachment

1) Insert claw at the left side of the front into the
rear cabinet.

2) Hook the lower part at the right side of the front
to concave part of the bottom plate. Insert claw
of the rear cabinet into square hole of the front
cabinet.

3) Attach the removed screws to the original
positions.

– 67 –

Claw

Square hole

Concave section

No.Part name

Procedure

Remarks

Inverter
assembly

1. Detachment

1) Perform work of item 1 of .

2) Remove screw (ST1TØ4 x 10 2 pcs.) of the
upper part of the front cabinet.

• If removing the inverter cover in this condition,

P.C. board can be checked.

• If there is no space in the upper part of the upper

cabinet, perform work of .

Be careful to check the inverter because
high-voltage circuit is incorporated in it.

3) Perform discharging by connecting + , – polarity by
discharging resistance (approx. 100Ω40W) or plug
of soldering iron to + , – terminals of the C14
(printed “CAUTION HIGH V OLTAGE” is attached.)
electrolytic capacitor (500µF) on P.C. board.

Be careful to discharge the capacitor
because the electrolytic capacitor cannot
naturally discharge and voltage remains
according to trouble type in some cases.

Inverter cover

Discharging position
(Discharging period
10 seconds or more)

P. C. board
(Soldered surface)

Plug of
soldering
iron

NOTE :
This capacitor is one with mass capacity.
Therefore, it is dangerous that a lar ge spark
generates if short-circuiting between + , –
polarity with screwdriver , etc. f or dischar ging.

4) Remove screw (ST1TØ4 x 10 2 pcs.) fixing the
main body and the inverter box.

5) Remove various lead wires from the holder at
upper part of the inverter box and wiring holder at
right side of the terminal block.

6) Remove the lead wire from the bundled part at left
side of the terminal block.

7) Pull the inverter box upward.

8) Disconnect connectors of various lead wires.

Requirement :
As each connector has a lock mechanism,
avoid to remove the connector by holding
the lead wire, but b y holding the connector.

Bundled
part

Holder

Terminal block

The connector is one with lock,
so remove it while
pushing the part
indicated by an
arrow.

– 68 –

Be sure to remove the connector
by holding the connector , not by
pulling the lead wire.

No.

Reactor



Control board
assembly

Part name

Procedure

1) Disconnect lead wires and connectors con­nected from the control board assembly to other
parts.

1. Lead wires Lead wires Lead wires Lead

wires

• Connection with terminal block :
3 wires (Black, White, Or ange)

• Connection with compressor :
Remove the connector (3P).

• Connection with reactor :
Remove the relay connectors from P07, 08
(2P, White) and P12, 13 (2P, Yellow).

2. Connectors
CN300 : Outdoor f an (3P, White)
CN301 : Outdoor fan position detection

(5P, White)
CN701 : 4 valve (3P, Yellow)
CN600 : TE sensor (2P, White)
CN601 : TD sensor (3P, White)
CN603 : TS sensor (3P, White)
CN602 : TO sensor (2P, White)
CN500 : Case thermo. (2P, White)
CN703 : Pulse modulating v alv e (6P, White)

Remarks

CN703 CN602 CN301

CN500

CN603

CN601 CN600

CN701

CN300

CN300, CN301 and CN701, etc.
at the control board assembly
side are connectors with locks.
Therefore, remo ve the connector
while pushing the part indicated
by an arrow.



Rear cabinet

2) Remove the control board assemb ly from P.C.
board base.

1. Main control board assembly side

• Remove two claws of P.C. board base, and
remove upward the heat sink with hands .

• Remove three screws fixing the heat sink
and main control board assembly side, and
replace the board with a new one.

1) Perform work of item 1 of , and , .

2) Remove fixed screws fixing to the bottom plate.
(ST1TØ4 x 10 3 pcs.)

3) Remove fixed screws fixing to the heat
exchanger. (ST1TØ4 x 10 2 pcs.)

4) Remove fixed screw fixing to the valve mounting
plate. (ST1TØ4 x 10 1 pc.)

P.C. board

P.C. board base

When mounting a new board,
check that the board is correctly
set in the groove of base holder of
P.C. board base.

– 69 –

No.





Part name

Fan motor

Compressor

Procedure

1) Perform work of item 1 of  and .

2) Remove the flange nut fixing the fan motor and
the propeller.

• Flange nut is loosened by turning clockwise.

(To tighten the flange nut, turn counterclock­wise.)

3) Remove the propeller fan.

4) Disconnect the connector for fan motor from the
inverter.

5) Remove the fixing screws (3 pcs.) holding by
hands so that the fan motor does not fall.

1) Perform work of item 1 of  and , , , .

2) Extract refrigerant gas.

3) Remove the partition board.
(ST1TØ4 x 10 2 pcs.)

4) Remove the sound-insulation material.

5) Remove terminal cover of the compressor, and
disconnect lead wire of the compressor thermo.
and the compressor from the terminal.

6) Remove pipe connected to the compressor with
a burner.

7) Remove the fixing screw of the bottom plate
and heat exchanger. (ST1TØ4 x 10 2 pcs.)

8) Remove the fixing screw of the bottom plate
and valve clamping plate.
(ST1TØ4 x 10 2 pcs.)

9) Pull upward the refrigeration cycle.

10) Remove nut fixing the compressor to the

bottom plate.

Fan motor

Propeller fan

Flange nut

Partition
board

Remarks

Valve
clamping
plate

Compressor
thermo.

Compressor



Reactor

1) Perform work of item 1 of , and .

2) Remove lead wires clung in holder on the
partition board.

3) Remove screws fixing the reactor.
(ST1TØ4 x 10 2 pcs.)

– 70 –

Reactor

No.



Part name

Pulse
modulating
valve coil

Procedure

1. Detachment

1) Perform work of item 1 of , and , , .

2) Turn the coil clockwise (counterclockwise) by 90
degrees, and remove coil from the pulse modulat­ing valve.

Remarks

2. Attachment

1) Set take-out part of the lead wire of coil to the coil
inserting position of the pulse modulating valve,
and attach the coil.

2) Turn the coil by 90 degrees, set surely the con­cave part at lower part of the coil to the position­ing hole of the pulse modulating valve, and then
fix the coil.

The pulse modulating valve has A room
side and B room side. After mounting it,
check that coil at B room side (Red mark­ing is marked on the pulse modulating
valve.) is connected to CN13 of the control
board assembly.



Fan guard 1. Detachment

1) Perform work of item 1 of , and .

2) Remove the front cabinet, and put it down so that
fan guard side directs downward.

Perform work on a corrugated cardboard,
cloth, etc. to prevent flaw to the product.

3) Remove the hooking claws by pushing minus
screwdriver according to the arrow mark in the
right figure, and remove the fan guard.

Take-out part
of lead wire

Notch

Coil inserting
position

Coil inserting
position

Coil fix
position

Positioning
hole

Minus screwdriver

Hooking claw

2. Attachment

1) Insert claw of the fan guard in the hole of the front
cabinet. Push the hooking claws (10 positions) by
hands and fix the claws.

All the attaching works have completed.
Check that all the hooking claws are fix e d
to the specified positions.

– 71 –

No.

11

Part name

Replacement of
temperature
sensor for
servicing only

Common service
parts of sensor
TO , TS, TE, TD

Procedure

1) Cut the sensor 100 mm longer than old one.

2) Cut the protective tube after pulling out it
(200 mm).

3) Move the protective tube toward the thermal
sensor side and tear the tip of lead wire in
two then strip the covering part.

4) Pass the stripped part through the thermal
constringent tube.

5) Cut the old sensor 100 mm length on the
connector side, and recycle that connector.

6) T ear the lead wire in two on the connector
side and strip the covering part.

7) T wist the leads on the connector and sensor
sides, and solder them.

8) Move the thermal constringent tubes toward
the soldered parts and heat them with the
dryer and constring them.

9) Wind the attached color tape round the both
terminals of the protective tube when
colored protective tube is used.

10) Fix the sensor again.

NOTES :

1) Store the joint part of the sensor and the
connector in the electric parts box.

2) Never joint them near the thermal sensor
part. Otherwise it would cause insulation
inferiority because of dew drops.

3) When replacing the sensor using the
colored protective tube, wind the color tape
matching the color of that tube.

Remarks

Thermal
sensor part

200

Thermal
constringent tube

Cutting here

100

15

70

Winding the color tape

Connector

Soldered part

Dryer

Cutting here

100

Cutting here

15

70

These are parts
for servicing
sensors.

Please check
that the
accessries
shown in the
right table are
packed.

Parts name

1

Sensor

2

Sensor Spring (A)

3

Sensor Spring (B)

4

Thermal constringent tube

5

Color tape

6

Terminal

– 72 –

Q'ty

1
1
1
3
1
3

Remarks

Length : 3m
For spare
For spare
Including one spare
9 colors

MCC-813

– 73 –

12-1. Indoor Unit (1)

405

12. EXPLODED VIEWS AND PARTS LIST

406

403

402

404

401

Location

No.

401 43T69319 Terminal Sensor

402 43T60001 Terminal

403 43T69320 Terminal Sensor

Part Description

TC, 10kΩ, 25°C

2P AC300V, 20A

TA, 10kΩ, 25°C

– 74 –

Location

No.

404 43T62003 Cord Clamp
405 43169079 P.C. Board Assembly,

406 43T69322 P.C. Board, MCC-867

Part Description

WRS-LED

Indoor Unit (2)

210

211

215

217

218

216

217

214

208

225

203

202

234

204

206

212

201

204

205

219

220

229

228

226

227

221

Electric Parts
Assenbly

209
231
232

233

207

222

223

224

Location

No.

201 43T00366 Front Panel Assembly
202 43T09316 Inlet Grille Assembly
203 43T03302 Back Body Assembly
204 43T80301 Air Filter
205 43T09309 Horizontal Louver
206 43T08350 LED Panel Assembl y
207 13T70002 Drain Hose
208 43T79301 Cap Drain
209 43T21321 Motor Louver,

210 43T44320 Refrigeration Cycle Assembly
211 43T47006 Pipe Delivery Ø6.35
212 43T47305 Pipe Suction Ø8.00
214 43T11301 Pipe Shield
215 43T19302 Holder Sensor
216 43T49302 Plate of EVA SEAL

Part Description

MP24GA, DC 12V

– 75 –

Location

No.

217 43T49006 Holder Plate EVA SEAL
218 43T79302 Guide Drain
219 43T22002 Bearing
220 43T39301 Base Bearing
221 43T20302 Fan Cross Flow
222 43T39302 Band Motor (Left)
223 43T21327 Motor Fan
224 43T39303 Band Motor (Right)
225 43T82301 Plate Installation
226 43T69306 Remote Controller
227 43T83003 Holder Remote Controller
228 43T85325 Owner’s Manual
229 43T62302 Terminal Cover
231 43T60317 Cord Motor Louver
232 43T60316 Cord Motor F an
233 43T07303 Holder Pipe
234 43T01303 Mark

Part Description

12-2. Outdoor Unit

31

32

2

17, 18

1

8

11, 13

19

7

10

28

20

12, 14

21

23

9

22

24, 25

6

2

5

33

1

4

3

4

22
23

27
26

Location

No.

01 43005368 Cabinet, Back, Assembly
02 43005369 Cabinet, Upper, Assembly
03 43005370 Cabinet, Front, Assembly
04 4301V030 Guard, Fan
05 43042461 Base, Assembly
06 4301V012 Cover, V alve, Packed
07 43062230 Cover, Wiring, Assembly
08 43019903 Hanger
09 43041607 Compressor,

10 43043644 Condenser
11 43046392 Valve, Pack ed, 6.35
12 43046391 Valve, Pack ed, 9.52
13 43147196 Bonnet, 1/4 IN
14 43047401 Bonnet, 3/8 IN
15 43047491 Tube, Capillary, I.D 1.5
17 43046351 Valve, Pulse, Modulating

Part Description

DA91A1F-44F

5

Location

No.

18 43046378 Coil, PMV, A12A07
19 43058264 Reactor
20 43050298 Thermostat, Bimetal,

21 4302C033 Moter, Fan
22 43047549 Nut, Flange
23 43020322 Fan, Propeller
24 43097204 Nut
25 43049643 Cushion, Rubber
26 43063320 Holder, Senser
27 43063321 Holder, Senser
28 43063195 Holder, Thermostat, Bimetal
29 43063322 Holder, Senser
31 43046344 Valve, 4-way, CHV-0213
32 43046348 Coil, Solenoid
33 43032441 Nipple, Drain

29

Part Description

CS-7 125

15

– 76 –

12-3. P.C. Board Layout

705

706

704

702

701

703

TE Sensor (Ø6)
TS Sensor (Ø6)
TO Sensor (Ø6)

TD Sensor (Ø4)

3

2

1

4

3

2

1

Location

No.

701 43050334 Sensor, TD(F4)
702 43050382 Senser, TC(F6)
703 43160469 Terminal Block, 6P

Part Description

Location

No.

704 43062228 Base, P.C. Board
705 43063324 Heatsink
706 4306S299 P.C. Board, Assembly,

Part Description

MCC813

– 77 –