Toshiba Air Conditioner Rav Sm802krt E User Manual

FILE NO.SVM-05053-1

SERVICE MANUAL

HI WALL TYPE (INDOOR UNIT)

RAV-SM562KRT-E

RAV-SM802KRT-E

R410A

Rev. Mar, 2006

1. SPECIFICATIONS

1-1. High-Wall Type(IndoorUnit)

Model name

RAV-SM562KRT-E

RAV-SM802KRT-E

Cooling

Heating

Average Cooling

Heating

Average

Standard capacity (Note 1)

(kW)

5.1

5.6

6.7

(1.5 – 5.6)

(1.5 – 6.3)

(2.2 – 8.0)

(2.2–9.0)

Heating low temp. capacity (Note 1) (kW)

Energy consumption effect ratio (Cooling)

Power supply

4.9

5.8

2.93 [D]

3.29 [C]

3.11

2.46 [E]

3.00 [D]

3.24

1 phase 230V (220 – 240V) 50Hz

Running current

(A)

(kW)

(%)

8.33–7.63

1.74

8.138–7.46

1.7

13.15–12.05 12.91–11.84

Electrical

Power consumption

characteristics

2.72

2.67

(Low temp.)

Power factor

Main unit

1.95

2.21

Pure white

Appearance

Model

Panel color

Height

Width

——

Ceiling Panel

(Sold separately)

(mm)

(kg)

298

Main unit

998

Depth

221

Outer

dimension

Height

Width

——

Ceiling panel

——

(Sold separately)

Depth

——

Main unit

Total weight

Ceiling panel

——

Heat exchanger

Finned tubu

Soundproof/Heat-insulating material

Fan

Inflammable polyethylene foam

Turbo fan

Foamed polyethylen

1110

Fan unit

Standard air flow High (Mid./Low) (m³/h)

840

Motor

(W)

Air filter

Attached main unit

Controller (Sold separately)

Gas side

Wired remote controller RBC-AMT21E

(mm)

Ø12.7 (1/2”)

Ø15.9 (5/8”)

Ø9.5 (3/8”)

Connecting

Liquid side

pipe

Ø6.4 (1/4”)

Drain port

(Nominal dia.)

(dB• A)

25 (Polyvinyl chloride tube)

36 45

Sound level

High (Mid./Low) (Note 2)

Note 1 : The cooling capacities and electrical characteristics are measured under the conditions speciied by JIS B 8616 based

on the reference piping. The reference piping consists of 3 m of main piping and 2 m of branch piping connected with 0

meter height.

Note 2 : The sound level is measured in an anechoic chamber in accordance with JIS B8616. Normally, the values measured in

the actual operating environment become larger than the indicated values due to the effects of external sound.

Note : Rated conditions

Cooling : Indoor air temperature 27°C DB/19°C WB, Outdoor air temperature 35°C DB

Heating : Indoor air temperature 20°C DB, Outdoor air temperature 7°C DB/6°C WB

– 2 –

Operation characteristic curve

RAV-SM802KRT-E

RAV-SM562KRT-E

• Conditions

Indoor : DB27 C/WB19°C

Outdoor : DB35°C

Air flow : High

Indoor : DB20°C

Outdoor : DB7 C/WB6°C

Air flow : High

Pipe length : 7.5m

230V

Pipe length : 7.5m

230V

¹⁵20

60 70 80

100

¹⁵20

80 90 100

Compressor speed (rps)

• Capacity variation ratioaccor ding to temperature

120

110

100

105

100

• Conditions

Indoor : DB27 C/WB19°C

Indoor : DB20°C

Indoor air flow : High

Pipe length : 7.5m

Indoor air flow : High

Pipe length : 7.5m

-14 -12 -10 -8 -6 -4 -2

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

Outsoor temp. (°C)

– 3 –

2. CONSTRUCTION VIEWS (EXTERNAL VIEWS)

High-Wall Type

RAV-SM562KRT-E/RAV-SM802KRT-E

Back body

Front panel

998

Air inlet

Grille inlet

220

Knock out system

Air outlet

Knock out system

Drain hose (0.54 m)

Connection pipe (0.49 m)

(Flare ∅6.35)

Connection pipe (0.39 m)

Wireless remote control

(For SM802 : Flare ∅15.88)

(For SM562 : Flare ∅12.7)

998

763.5

450

(For stud bolt ∅6)

(For stud bolt ∅8 -∅10)

Outline of indoor unit

Installation

Plate outline

∅

100

– 4 –

3. SYSTEMATIC REFRIGERATING CYCLE DIAGRAM

3-1. Hi Wall type

RAV-SM562KRT-E/SM802KRT-E

Indoor unit

TCJ

sensor

Air heat exchanger

Model

Outer diameter of refrig erant pipe

TC sensor

RAV-SM

Gas side ØA

12.7 mm

Liquid side ØB

6.4 mm

562KRT-E

802KRT-E

9.5 mm

15.9 mm

Refrigerant pipe

at gas side

Outer dia. ØA

Refrigerant pipe

at liquid side

Outer dia. ØB

Packed valve

Outer dia. ØA

Packed valve

Outer dia. ØB

Outdoor unit

NOTE :

The refrigerating cycle differs according to the combined outdoor units.

For the cycle diagram, cycle pressure, etc., refer to the following Service Manual.

RAV-SMXXX0AT-E : A03-007

RAV-SPXXXXAT-E : A03-014

RAV-SMXXX1AT-E : A05-001

Cooling

Heating

– 5 –

4. WIRING DIAGRAM

4-1. Hi Wall type (Indoor unit)

RAV-SM562KRT-E/SM802KRT-E

ＴＥＲＭＩＮＡＬ

ＢＬＯＣＫ

ＬＯＵＶＥＲ

ＭＯＴＯＲ

FAN

MOTOR

BLK

５４３２１

ＢＵＳ

ＥＭＧ

６５４３２１

６５４３

１

２

ＣＮ２２

１

２

１

２

３

４

５

ＣＮ５０

ＣＮ４４

(ＢＲＷ)

ＣＮ３３

（ＷＨＩ）

ＣＮ２１０

（ＷＨＩ）

ＣＮ４０

（ＢＬＵ）

（ＷＨＩ）

ＴＥＲＭＩＮＡＬ

ＢＬＯＣＫ

Ｆ３０１　ＦＵＳＥ

ＢＬＫ

３３

２２

１１

Ｔ３．１５Ａ　２５０Ｖ～

Ｂ

Ａ

ＣＮ４１

_{ＤＣ１５Ｖ}（ＢＬＵ）

１１

３３

５５

１

２

３

^{ＤＣ　０Ｖ}ＣＮ１００

^{ＤＣ１２Ｖ}（ＢＲＷ）

WHI

BLK

ＰＯＷＥＲ

ＳＵＰＰＬＹ

ＣＩＲＣＵＩＴ

ＣＮ６７

（ＢＬＫ）

ＤＣ７Ｖ

1 2

ＨＥＡＴ

１１^ＢＬＫ

２２^ＢＬＫ

ＣＮ２１３（ＷＨＩ）

ＣＮ１０１

（ＢＬＵ）

ＥＸＣＨＡＮＧＥＲ

ＳＥＮＳＯＲ

（ＴＣ）

１２３４５６７８

ＣＮ１(WHI)

WIERD REMOTE

CONTROLLER

１

２

ＣＮ１０３

（ＧＲＮ）

（ＭＣＣ－１５１０）

１２３４５６７８

ＨＥＡＴ

ＢＬＫ

１１

２２

ＣＮ１０２

（ＹＥＬ）

ＥＸＣＨＡＮＧＥＲ

ＳＥＮＳＯＲ

（ＴＣＪ）

Control P.C board

for indoor unit

ＩＮＦＲＡＲＥＤ　ＲＡＹＳ　ＲＥＣＥＩＶＥ

ＡＮＤ　ＩＮＤＩＣＡＴＩＯＮ　ＰＡＲＴＳ

（ＭＣＣ－８１９）

ＢＬＫ

１１

２２

ＣＮ１０４

（ＷＨＩ）

ＣＮ６１

ＣＮ６０

（ＷＨＩ）

ＣＮ８０

（ＧＲＮ）

ＣＮ８２

（ＢＬＵ）

ＣＮ８１

ＴＨＥＲＭＯ

ＳＥＮＳＯＲ

（ＴＡ）

（ＹＥＬ）

（ＢＬＫ）

１２３

１２３４５６

１２３４５

１

２

３

４

５

６

１

２

３

４

５

６

ＰＮＬ/ＥＭＧ

ＯＰＴＩＯＮ

１

２

３

４

RED WHI BLK

Color

1 2 3

Identification

Indoor unit

earth screw

NOTE

BLK : BLACK

BLU : BLUE

RED : RED

GRY : GRAY

PNK : PINK

GRN : GREEN

WHI : WHITE

BRW : BROWN

ORN : ORANGE

YEL : YELLOW

FM : Fan motor

TA : Indoor temp. sensor

TC :Temp. sensor

Outdoor unit

earth screw

Serial

L N

signal

TCJ :Temp. sensor

LM : Louver motor

Single phase 220V, 50Hz

– 6 –

5. SPECIFICATIONS OF ELECTRICAL PARTS

5-1. Indoor Unit

High-Wall Type

RAV-SM562KRT-E/RAV-SM802KRT-E

No.

Parts name

Fan motor (for indoor)

Type

Specifications

ICF340-30-X

MF-340-30-X

MP35EA12

Output (Rated) 30 W, 220–240 V

Grille motor

Thermo. sensor (TA-sensor)

Heat exchanger sensor (TC-sensor)

Heat exchanger sensor (TCJ-sensor)

268 mm

10 kW at 25°C

Ø6 mm, 400 mm

10 kW at 25°C

– 7 –

6. REFRIGERANT R410A

This air conditioner adopts the new refrigerant HFC

(R410A) which does not damage the ozone layer.

(6) When an air conditioning system charged with a

large volume of refrigerant is installed in a small

room, it is necessary to exercise care so that,

even when refrigerant leaks, its concentration

does not exceed the marginal level.

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 refrigerat-

ing oil are not entered in the refrigerant cycle of the

air conditioner using the new refrigerant during

installation work or servicing time.

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.

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.

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.

6-1. Safety During Installation/Servicing

Improper repairÕs may result in water leakage,

electric shock and fire, etc.

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 materi-

als exclusive for R410A, it is necessary to carry out

installation/servicing safely while taking the following

precautions into consideration.

6-2. Refrigerant Piping Installation

6-2-1. 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) Never use refrigerant other than R410A in an air

conditioner which is designed to operate with

R410A.

If other refrigerant than R410A is mixed, pres-

sure in the refrigeration cycle becomes abnor-

mally high, and it may cause personal injury, etc.

by a rupture.

(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 discol-

ored portion (especially on the interior surface).

Otherwise, the expansion valve or capillary tube

may become blocked with contaminants.

(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 condi-

tioner using R410A as refrigerant.To prevent

mischarging, the diameter of the service port

differs from that of R22.

As an air conditioner using R410A incurs

pressure higher than when using R22, it is

necessary to choose adequate materials.

(3) If a refrigeration gas leakage occurs during

installation/servicing, be sure to ventilate fully.

Thicknesses of copper pipes used with R410A

are as shown in Table 6-2-1. Never use copper

pipes thinner than 0.8 mm even when it is

available on the market.

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.

– 8 –

Table 6-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

Nominal diameter

Outer diameter (mm)

R410A

0.80

R22

0.80

1.00

1/4

3/8

1/2

5/8

6.35

9.52

0.80

12.70

15.88

0.80

1.00

(2) Joints

b) Socket Joints

For copper pipes, flare joints or socket joints are

used. Prior to use, be sure to remove all con-

taminants.

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 6-2-2.

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 6-2-3 to 6-

2-6 below.

Table 6-2-2 Minimum thicknesses of socket joints

Reference outer diameter of

copper pipe jointed (mm)

Minimum joint thickness

(mm)

Nominal diameter

1/4

3/8

1/2

5/8

6.35

9.52

0.50

0.60

0.70

0.80

12.70

15.88

(1) Flare Processing Procedures and Precautions

a) Cutting the Pipe

6-2-2. 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.

By means of a pipe cutter, slowly cut the pipe

so that it is not deformed.

b) Removing Burrs and Chips

If the flared section has chips or burrs,

refrigerant leakage may occur. Carefully

remove all burrs and clean the cut surface

before installation.

– 9 –

c) Insertion of Flare Nut

d) Flare Processing

Flare processing dimensions differ according

to the type of flare tool. When using a con-

ventional flare tool, be sure to secure "dimen-

sion A" by using a gauge for size adjustment.

Make certain that a clamp bar and copper

pipe have been cleaned.

ØD

By means of the clamp bar, perform the flare

processing correctly.

Use either a flare tool for R410A or conven-

tional flare tool.

Fig. 6-2-1 Flare processing dimensions

Table 6-2-3 Dimensions related to flare processing for R410A

A (mm)

Conventional flare tool

Clutch type Wing nut type

1.0 to 1.5 1.5 to 2.0

Outer

diameter

(mm)

Nominal

diameter

Thickness

(mm)

Flare tool for

R410A clutch type

1/4

3/8

1/2

5/8

6.35

9.52

0.8

1.0

0 to 0.5

1.0 to 1.5

1.5 to 2.0

2.0 to 2.5

12.70

15.88

Table 6-2-4 Dimensions related to flare processing for R22

A (mm)

Outer

diameter

(mm)

Nominal

diameter

Thickness

(mm)

Conventional flare tool

Flare tool for

R22 clutch type

Clutch type

Wing nut type

1.0 to 1.5

1/4

3/8

1/2

5/8

6.35

9.52

0.8

1.0

0 to 0.5

0.5 to 1.0

1.0 to 1.5

12.70

15.88

1.5 to 2.0

Table 6-2-5 Flare and flare nut dimensions for R410A

Dimension (mm)

Nominal

diameter

Outer diameter

(mm)

Thickness

(mm)

Flare nut

width (mm)

1/4

3/8

1/2

5/8

6.35

9.52

0.8

1.0

9.1

9.2

6.5

13.2

16.6

19.7

13.5

16.0

19.0

9.7

12.70

15,88

12.9

16.0

– 10 –

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

Dimension (mm)

Nominal

diameter

Outer diameter

Thickness

(mm)

Flare nut width

(mm)

1/4

3/8

1/2

5/8

3/4

6.35

9.52

0.8

1.0

9.0

9.2

6.5

13.0

16.2

19.4

23.3

13.5

16.0

19.0

24.0

9.7

12.70

15.88

19.05

12.9

16.0

19.2

Fig. 6-2-2 Relations between flare nut and flare seal surface

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 6-2-7

shows reference values.

(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.

NOTE:

c) Tighten the flare with designated torque by

means of a torque wrench. The tightening

torque for R410A is the same as that for

conventional R22. Incidentally, when the

torque is weak, the gas leakage may occur.

When applying oil to the flare surface, be sure to use

oil designated by the manufacturer. If any other oil is

used, the lubricating oils may deteriorate and cause

the compressor to burn out.

Table 6-2-7 Tightening torque of flare for R410A [Reference values]

Tightening torque of torque

wrenches available on the market

Nominal

diameter

Outer diameter

(mm)

Tightening torque

N m (kgf cm)

16 (160), 18 (180)

42 (420)

1/4

3/8

1/2

5/8

6.35

9.52

14 to 18 (140 to 180)

33 to 42 (330 to 420)

50 to 62 (500 to 620)

63 to 77 (630 to 770)

12.70

15.88

55 (550)

65 (650)

– 11 –

6-3. Tools

6-3-1. RequiredTools

The service port diameter of packed 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

R410A

Conventional air

conditioner installation

air conditioner installation

No.

Used tool

Usage

Existence of

Whether conven- Whether new equipment

new equipment tional equipment

can be used with

for R410A

can be used

conventional refrigerant

Flare tool

Pipe flaring

Ye s

(Note 1)

Copper pipe gauge for

adjusting projection

margin

Flaring by conventional

flare tool

Ye s

(Note 1)

Connection of flare nut

Torque wrench

Gauge manifold

Charge hose

Evacuating, refrigerant

charge, run check, etc.

Vacuum pump adapter Vacuum evacuating

Ye s

Electronic balance for

Refrigerant charge

refrigerant charging

Refrigerant cylinder

Leakage detector

Charging cylinder

Refrigerant charge

Gas leakage check

Refrigerant charge

Ye s

(Note 2)

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection

margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

(Note 2) Charging cylinder for R410A is being currently developed.

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary

as the general tools.

(1) Vacuum pump

(4) Reamer

(9) Hole core drill (Ø65)

Use vacuum pump by

attaching vacuum pump adapter.

(5) Pipe bender

(10) Hexagon wrench

(Opposite side 4mm)

(6) Level vial

(2) Torque wrench

(3) Pipe cutter

(11) Tape measure

(12) Metal saw

(7) Screwdriver (+, -)

(8) Spanner or Monkey wrench

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

(1) Clamp meter

(2) Thermometer

(3) Insulation resistance tester

(4) Electroscope

– 12 –

6-4. 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.

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.

Connect the charge hose to packed valve service

port at the outdoor unit's gas side.

Keep the status as it is for 1 to 2 minutes, and ensure

that the compound gauge's pointer does not return.

Connect the charge hose of the vacuum pump

adapter.

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.

Open fully both packed valves at liquid and gas

sides.

Place the handle of the gauge manifold Low in the

fully opened position, and turn on the vacuum pump's

power switch. Then, evacuating the refrigerant in the

cycle.

(For refrigerant charging, see the figure below.)

Never charge refrigerant exceeding the specified amount.

If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.

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)

(Gas side)

(OUTDOOR unit)

Opened

Closed

Refrigerant cylinder

(With siphon pipe)

Check valve

Open/Close valve

for charging

Service port

Electronic balance for refrigerant charging

Fig. 6-4-1 Configuration of refrigerant charging

– 13 –

Be sure to make setting so that liquid can be charged.

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

c y l i n d e r

a n t g i e r R e f r

Refrigerant

cylinder

Electronic

balance

Electronic

balance

Siphon

R410A refrigerant is HFC mixed refrigerant.

Therefore, if it is charged with gas, the composi-

tion of the charged refrigerant changes and the

characteristics of the equipment varies.

Fig. 6-4-2

6-5. Brazing of Pipes

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.

6-5-1. 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 expen-

sive though it excels in solderability.

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.

6-5-2. Flux

(1) Reason why flux is necessary

(3) Low temperature brazing filler

1.By removing the oxide film and any foreign

matter on the metal surface, it assists the flow

of 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.In the brazing process, it prevents the metal

surface from being oxidized.

3.By reducing the brazing filler's surface tension,

the brazing filler adheres better to the treated

metal.

– 14 –

(2) Characteristics required for flux

6-5-3. Brazing

1.Activated temperature of flux coincides with

the brazing temperature.

As brazing work requires sophisticated techniques,

experiences based upon a theoretical knowledge, it

must be performed by a person qualified.

2.Due to a wide effective temperature range, flux

is hard to carbonize.

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.

3.It is easy to remove slag after brazing.

4.The corrosive action to the treated metal and

brazing filler is minimum.

5.It excels in coating performance and is harm-

less to the human body.

Never use gas other than Nitrogen gas.

(1) Brazing method to prevent oxidation

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.

Attach a reducing valve and a flow-meter to

the Nitrogen gas cylinder.

Use a copper pipe to direct the piping mate-

rial, and attach a flow-meter to the cylinder.

(3) Types of flux

Noncorrosive flux

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.

Generally, it is a compound of borax and boric

acid.

It is effective in case where the brazing tem-

perature is higher than 800°C.

When the Nitrogen gas is flowing, be sure to

keep the piping end open.

Activated flux

Adjust the flow rate of Nitrogen gas so that it

is lower than 0.05 m³/Hr or 0.02 MPa (0.2kgf/

cm²) by means of the reducing valve.

Most of fluxes generally used for silver brazing

are this type.

It features an increased oxide film removing

capability due to the addition of compounds

such as potassium fluoride, potassium chloride

and sodium fluoride to the borax-boric acid

compound.

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).

Remove the flux completely after brazing.

(4) Piping materials for brazing and used braz-

ing filler/flux

Piping

material

Used brazing

filler

Used

flux

Copper - Copper Phosphor copper Do not use

Flow meter

Copper - Iron

Iron - Iron

Silver

Paste flux

Vapor flux

Stop valve

Nitrogen gas

cylinder

From Nitrogen cylinder

Do not enter flux into the refrigeration cycle.

When chlorine contained in the flux remains

within the pipe, the lubricating oil deteriorates.

Therefore, use a flux which does not contain

chlorine.

Pipe

Nitrogen

gas

Rubber plug

When adding water to the flux, use water

which does not contain chlorine (e.g. distilled

water or ion-exchange water).

Remove the flux after brazing.

Fig. 6-5-1 Prevention of oxidation during brazing

– 15 –

7. INDOOR UNIT CONTROL

7-1. Indoor Control Circuit

Main (Sub) master remote controller

(Wired)

Weekly timer

LCD

driver

Display

LCD

Display

LCD

Max. 8 units are connectable.*1

CPU

Display

LED

Function setup

Key switch

Function setup

Key switch

*1 When group and twin combination.

main remote controller shal be connected

follower indoor unit

CPU

CN2 CN1

*2 Weekly timer is not connectable to the

sub remote controller.

DC5V

Remote

Power

circuit

Secondary

battery

controller

communication

circuit

Power circuit

Sold separatrly

Indoor unit

#1 Header unit

Follower unit

Indoor control P.C. board (MCC-1510)

Central control

communication

circuit

Central control

remote controller

(Sold separatrly)

EEPROM

Remote

controller

communication

circuit

DC20V

DC12V

DC5V

Reciver and Display P.C board

(MCC-819)

TA sensor

TC sensor

TCJ sensor

Buzzer

Driver

Reciver unit

Display LED

CPU

H8/3039

Same as Same as

the left the left

Driver

Louver

motor

Outside

output

Serial

send/

receive

circuit

Run

Wireless

remote

signal

synchronous

signal input

circuit

Warning

Ready

Setting

Thermo. ON

(A/B)

Fan motor

control

Cool

Heat

Fan

1 2 3

Indoor

fan

motor

Power

circuit

DC280V

DC15V

Outdoor

unit

Outdoor

unit

1 2 3

Outdoor unit

– 16 –

INDOOR UNIT CONTROL CIRCUIT (Continued)

7-2. Control Specifications

NO.

Item

Control at

power-on reset

Overview of specifications

(1) Identification of outdoor unit

Remarks

The “PREPARING” lamp

lights during initial setting

(model recognition) after

Identifies outdoor unit at power-on reset, and switches control

according to the identification result.

(2) Setting of indoor unit fan speed and adjustment of air flow direction power-on reset.

Switches indoor unit fan speed, setting of air flow direction

Fan speed, adjustment of

adjustment, etc. based on EEPROM data.

air flow direction

Operation mode

switching

(1) Switches operation mode according to mode select instruction

from remote controller.

R/C instructions

OFF

Outline of control

Turns OFF air conditioner

FAN

“Fan only” operation

Cooling operation

COOL

DRY

Dehumidifying operation

Heating operation

HEAT

AUTO

• Selects COOL or HEAT mode

automatically according to Ta, Ts, and To.

Ta : Room temperature

Ts : Set temperature

• The first operation is as follows according

to Ta. (COOL thermo sensor continues

OFF (FAN mode with set fan speed) within

To : Outside air temperature

the range of Ts +α-1<Ta< Ts +α+1.)

COOL

operation

+1.0

FAN mode with

set fan speed

Ts+

(

)

-1.0

HEAT

operation

• α is corrected according to outside air

temperature.

Outside air temp. Corrected value (α)

No To

0 K

-1 K

0 K

k=deg

To 24°C

24>To 18°C

To<18°C

+1 K

0 K

Abnormal To

(2) Operation instruction permission mode

HEAT and AUTO modes are not available for COOL only models.

When instruction is issued from wireless remote controller in the

HEAT or AUTO mode, it is indicated by a reception sound “pi, pi”

and by alternate blinking of “TIMER” and “PREPARING” lamps. To

cancel this alternate blinking, issue an instruction of mode other

than HEAT or AUTO.

Room temperature (1) Adjustment range Remote controller set temperature (°C)

control

COOL/DRY HEAT AUTO

Wired type

18 - 29

17 - 30

18 - 29 18 - 29

17 - 30 17 - 30

Wireless type

* When use of remote controller sensor is set (with DN32), even

when sensor value is within the above range in HEAT or AUTO

mode, the thermo sensor turns OFF when Ta sensor value

exceeds 35 °C.

– 17 –

NO.

Item

Remarks

Overview of specifications

Room temperature

control

Heat intake temperature

shift

(2) The set temperature for HEAT operation can be corrected by code

No. 06.

(When unit’s temperature

sensor is used)

Set data

Correction of set temp. +0°C +2°C +4°C +6°C

Factory setting

Set data

* When use of remote controller sensor is set (with DN32), no

correction is performed.

Capacity auto

control

(1) Issues instruction of operating frequency to outdoor unit according

to the difference between Ta and Ts.

(2) COOL operation

(GA control)

Calculates room temp. difference between Ta and Ts as well as

room temp. variation every 90 seconds to find correction value of

specified operating frequency and to correct the current operating

frequency.

Ta(n)–Ts(n) : Room temp. difference

Ta(n-1)–Ta(n) : Room temp. variation

: Number of detection times

n–1: Number of detection times

(90 seconds before)

(3) HEAT operation

Calculates room temp. difference between Ta and Ts as well as

room temp. variation every 60 seconds to find correction value of

specified operating frequency and to correct the current operating

frequency.

Ts(n)–Ts(n) : Room temp. difference

Ta(n)–Ta(n_1) : Room temp. variation

: Number of detection times

n–1: Number of detection times

(60 seconds before)

(4) DRY operation

The frequency correction control is the same as that for COOL

operation.

However, the maximum frequency is limited to S6 or so.

Note) When LOW fan speed is set, the maximum frequency is

limited to SB or so.

COOL/HEAT/

AUTO control

(1) Switching between COOL and HEAT is determined based on the

following control.

(˚C)

After 10 minutes pass from

thermo sensor OFF,

operation mode changes

from HEAT (thermo sensor

OFF) to COOL if Ta exceeds

Tsh +1.5.

COOL

+1.5

(COOL ON)

Tsc : COOL set temp.

Tsc

Tsh

Tshc : HEAT set temp. +

room temp. control/

correction

(COOL OFF)

HEAT

-1.5

( ) shows an example of

COOL ON/OFF.

After 10 minutes pass from

thermo sensor OFF,

operation mode changes

from COOL (thermo sensor

OFF) to HEAT if Ta lowers

below Tsc -1.5.

(2) The GA control after determination of operation mode follows the

description in No. 4.

(3) The room temperature control and temperature correction follow

the descriptions in No. 3 and No. 15.

– 18 –

INDOOR UNIT CONTROL CIRCUIT (Continued)

NO.

Item

Overview of specifications

Remarks

Fan speed control (1) A fan speed HH (quick high), H (high), L (low) or AUTO is selected HH>H+>H>

according to the instruction from remote controller for FAN mode

operation.

L+>L>UL

(2) Fan speed is switched according to the difference between Ta and Wireless type allows HH,

Ts in the AUTO mode.

H+, H, L+, L, and AUTO.

[Cooling]

H+

Ta (˚C)

+3.0

+2.5

+2.0

+1.5

+1.0

(HH)

L+

H+(HH)

H(HH)

L+(H+)

+0.5

Tsc

-0.5

L(H)

L(L+)

• The fan speed control is the same for temperature setting by remote

controller or the unit.

• Once fan speed is changed, it remains unchanged for 3 minutes

unless different fan speed is selected by instruction.

• At the beginning of cooling, a falling gradient (higher fan speed) is

selected.

• When the temperature difference between Ta and Ts is on a

threshold line, fan speed does not change.

• ( ): Auto cooling

[Heating]

Ta (˚C)

L( L+)

(-0.5)

(0)

-1.0

Tsh

L+(H)

H(H+)

(+0.5)

+1.0

H+

(HH)

(+1.0)

(+1.5)

+2.0

+3.0

(HH)

(+2.0)

+4.0

( ): Temperature setting by remote controller

Other than ( ): Temperature setting by unit

• Once fan speed is changed, it remains unchanged for one minute

unless different fan speed is selected by instruction.

• At the beginning of heating, a rising gradient (higher fan speed) is

selected.

• When the temperature difference between Ta and Ts is on a

threshold line, fan speed does not change.

• ( ): Auto heating

• Fan speed is switched to a higher level when Tc reaches 60 °C.

Tc : Indoor unit heat

exchange sensor

temp.

– 19 –

NO.

Item

Overview of specifications

Remarks

Fan speed control

COOL HEAT AP40-56

AP63

1360

1300

1240

1200

1120

1020

970

AP71-80

1480

1340

1320

1300

1200

1100

1040

500

1220

1180

1140

1120

1060

990

H+

L+

940

500

(3) When thermo sensor turns OFF during heating, the fan speed

mode becomes UL (weak).

“HEAT PREPARING”

indication

(4) When Ta is 25 °C or above at the beginning of HEAT operation or

when canceling defrost mode, H or HH mode continues for one

minute from the time when Tc enters zone E shown in the figure in

No.7 below.

(5) The HH fan speed for auto cooling/heating is set to a speed higher

than that for normal cooling/heating. However, it varies depending

on the temperature difference of Tc during auto heating.

(˚C)

HH+

Cool air prevention (1) Performs indoor unit fan control in the HEAT mode according to

Fan speed select setting

by remote controller takes

precedence in zones D

control

the Tc (or Tcj) sensor detect temperature. The maximum speed is

limited as shown below.

Shifts Tc control value by +6 °C and E.

during defrosting. However, zone “HEAT PREPARING” is

Tcj

(˚C)

B is regarded as zone C after 6

indicated in zones A and

minutes pass from the startup of B.

compressor.

Zone E

Zone D

OFF

Zone C

Zone B

Zone A

– 20 –

INDOOR UNIT CONTROL CIRCUIT (Continued)

NO.

Item

Freezing

prevention control

(low-temp.

Overview of specifications

Remarks

(1) Performs the following operation control in the COOL or DRY

mode according to the Tc (or Tcj) sensor detect temperature.

When zone J in the figure below is detected for 6 minutes, the

specified operating frequency is decreased from the actual

operating frequency, and the specified operating frequency is

changed every 30 seconds in zone J.

Tcj : Indoor unit heat

exchange sensor

temp.

release)

Timer count stops and is maintained in zone K.

Timer count is cleared to restore normal operation when zone I is

detected.

If the specified operating frequency becomes SO due to

continuation of zone J, return temperature A is raised from 5 to

12 °C, and operation with L fan speed continues until zone I is

detected.

Tc(˚C)

If 4-way valve cannot be switched during heating and the following

conditions become true, freezing prevention control is performed.

(However, zone J entering control temperature is changed from 2

to -5 °C.)

Tcn :

Tc after 5 minutes

from operation start

Tc (n-1):

[Conditions]

Tc at operation start

The following Aor Bbecomes true after 5 minutes pass from

operation start.

ATcn Tc(n–1)–5

BTcn<Tc(n–1)–1 and Tcn Ta<5°C

High-temp. release (1) Performs the following operation control in the HEAT mode

control according to the Tc (or Tcj) sensor detect temperature.

•

When zone M is detected, the specified operating frequency is

decreased from the actual operating frequency, and the specified

operating frequency is changed every 30 seconds in zone M.

This control is disabled for

twin follower indoor units.

• The specified operating frequency is maintained in zone N.

• When zone L is detected, the specified operating frequency is

returned by approx. 6 Hz every 60 seconds.

Tcj

Factory setting

(˚C)

Control temp. (°C)

56 (54)

52 (52)

Even when the thermo is

set to OFF, the control is

implemented in the same

way.

Note) At the beginning of operation or when Tc (or Tcj) lowers below

30 °C after operation start, values (54) and (52) in the table are

used as control temperature.

10 Residual heat

removal

Runs indoor unit fan in L (low) mode for about 30 seconds after HEAT

operation stops to remove residual heat.

– 21 –

NO.

Item

Overview of specifications

(1) During the first operation after power on, flap position is controlled Louver angle: 0 °C (full

automatically according to operation mode (COOL/HEAT). close)

Remarks

11 Flap control

Cooling

Heating

Full close

103°

0°

45°

(2) When louver position is controlled by remote controller, the unit’s

microcomputer memorizes the position for use in the next

operation.

* The memorized louver position is cleared when power is turned

off, and returns to the state of (1) above.

Alarm : A code number

(except F08 and

L31) appears on

the remote

(3) Flap position setting

• Flap position can be set within the range below.

COOL/DRY

HEAT/FAN

controller and the

indoor unit stops.

• Flap position can be set collectively or individually in the group

twin or triple operation mode. (Wireless remote controller allows

individual setting only.)

(4) Swing setting

• Flap moves within the range below.

All operation modes

• Flap swing range can be set collectively or individually in the

group twin or triple operation mode. (Setting by wireless remote

controller is disabled when the main remote controller is used.)

(5) When air conditioner operation stops, flap closes automatically. It

keeps its position in the event of an alarm.

(6) Flap tilts upward automatically during preparation for heating.

(7) In the twin or triple operation mode selected by wireless remote

controller, swing setting interlocks with the header indoor unit. If

this setting is transmitted from a follower indoor unit, operation

does not change with a reception sound “pi, pi, pi” if operation

mode differs between header unit and follower unit.

– 22 –

INDOOR UNIT CONTROL CIRCUIT (Continued)

Item

Overview of specifications

Remarks

NO.

12 HA control

(1) When connected to a remote control system (tele-control or

remote on/off interface), operation ON/OFF can be controlled by

the HA signal input.

A connector (separately

available) is required

when using the HA

(2) Outputs operation ON/OFF status to the HA output terminal.

(3) HA signal input/output specifications conform to the JEMA

standard.

terminal CH61 for remote

ON/OFF control.

When group operation is

in use, connect the

connector to either header

or follower indoor unit.

13 Filter sign

indication

(1) Transmits filter replacement signal to remote controller for

indication on the LCD when accumulated operation hours of

indoor unit fan exceeds the specified time (150 hours).

“FILTER” lamp ON

(unavailable for

wireless type)

(2) Clears accumulation timer upon receiving the filter reset signal

from remote controller. At this time, when the specified time has

already passed, the accumulated time is reset and the filter sign

disappears from the LCD.

– 23 –

NO.

Item

Overview of specifications

Remarks

14 Central control

mode switching

(1) The scope of operation by remote controller on the indoor unit

side can be switched by the setting of remote controller.

(2) Scope of operation by remote controller on the indoor unit side

[Individual] : All settings and ON/OFF operations are available.

[Central 1] : ON/OFF operations are disabled.

No indication

“CENTRAL CONTROL”

lamp ON

[Central 2] : ON/OFF operations, operation mode selection, and

temperature setting are disabled.

“CENTRAL CONTROL”

lamp ON

[Central 3] : Operation mode selection and temperature setting

are disabled.

“CENTRAL CONTROL”

lamp ON

[Central 4] : Operation mode selection is disabled.

“CENTRAL CONTROL”

lamp ON

When wired remote

controller is not used,

operation range is the

same as above though

lamp indication remains

unchanged.

If an unavailable operation

mode is transmitted from

wireless remote controller,

it is indicated with a

reception sound “pi, pi, pi,

pi, pi”.

15 Power-saving

control

(1) Power-saving operation is available in the AUTO mode.

(2) The set temperature is corrected using various sensor data within

the range where comfort is maintained.

(3) By using various sensor data including room temp. Ta, outside air

temp. To, fan speed, and indoor unit heat exchange sensor temp.

Tc, 20-minute data is averaged to calculate a set temperature

correction value.

(4) The set temperature is corrected every 20 minutes with the

following shift range.

Cooling : +1.5 to -1.0K

Heating : -1.5 to +1.0K

16 Maximum

frequency limit

control

(1) This control is performed when AUTO mode is selected.

(2) COOL mode: When To is under 28 °C, the control is as follows.

Ta(˚C)

Normal control

Maximum frequency is

limited to the rating of cooling.

Tsc

(3) HEAT mode: When To is over 15 °C, the control is as follows.

Ta(˚C)

Tsh

Maximum frequency is limited

to the rating of heating.

-3

-4

Normal control

– 24 –

INDOOR UNIT CONTROL CIRCUIT (Continued)

7-3. P. C. Board of Indoor Unit

MCC-1510

Microcomputer

run LED

TC sensor

TCJ sensor

Indoor unit - outdoor unit wire

EEPROM

CN101, DC5V

CN102, DC5V

D02

IC10

CN67, AC200V

HA (T10)

Optional power supply

CN61, DC12V

CN309, AC200V

Option output

CN60, DC12V

CHK

CN71, DC5V

Central control

DISP

CN40, DC 5V

CN72, DC5V

External alarm input

CN80, DC12V

Terminating resistor

provided/not provided

EXCT

CN73, DC5V

Remote controller A/B

selection

R/C power LED

SW01

D203

TA sensor

CN104, DC5V

Remote controller

CN41, DC20V

Louver

DC fan input/output

Indication output/wireless reception

FAN DRIVE

CN32, DC12V

CN33, DC12V

CN210

CN213, DC5V

– 25 –

7-4. Optional Onboard Connector Specifications

– 26 –

8. Troubleshooting

1. Guide to Troubleshooting

[Wired Remote Controller Type]

(1) Before starting troubleshooting

(a) Necessary tools/measuring equipment

• Phillips screwdrivers, flat-blade screwdrivers, wrenches, pliers, nipper, etc.

• Multimeter, thermometer, pressure gauge, etc.

(b) Precheck

AThe following operations are normal.

1) Compressor does not work.

• Is 3-minute delay operation functioning? (for 3 minutes after compressor OFF)

• Is thermo sensor OFF?

• Is FAN mode or TIMER mode operation going?

• Is water overflow alarm detected?

• Is high outside air temperature operation control working during heating?

2) Indoor unit fan does not work.

• Is cool air prevention control working during heating?

3) Outdoor unit fan does not work or its fan speed changes.

• Is high-temp. release operation control working during heating?

• Is low outside air temperature operation control working during cooling?

• Is defrosting operation going?

4) Operation ON/OFF by remote controller is disabled.

• Is any remote controller or external control working?

• Is auto address setting in progress?

(At t he first power on or when indoor unit address is changed, operation control is disabled for

about 5 minutes after power on.)

BAre all cables/wiring set in the initial state?

CAre indoor unit and remote controller connected correctly?

(2) Troubleshooting procedure

When an error occurs, check the unit in the following procedure.

Error → Check indication of check code

→

Check faulty location and parts

(Note) Other than the check items in the table, malfunction or wrong diagnosis of microcomputer

due to effect of power or external noise is considered. If there is any source of noise, shield

the remote controller wiring.

[Wireless Remote Controller Type]

(1) Before starting troubleshooting

(a) Necessary tools/measuring equipment

• Phillips screwdrivers, flat-blade screwdrivers, wrenches, pliers, nipper, etc.

• Multimeter, thermometer, pressure gauge, etc.

(b) Precheck

AThe following operations are normal.

1) Compressor does not work.

• Is 3-minute delay operation functioning? (for 3 minutes after compressor OFF)

• Is thermo sensor OFF?

• Is FAN mode or TIMER mode operation going?

• Is high outside air temperature operation control working during heating?

2) Indoor unit fan does not work.

• Is cool air prevention control working during heating?

– 27 –

3) Outdoor unit fan does not work or its fan speed changes.

• Is high-temp. release operation control working during heating?

• Is low outside air temperature operation control working during cooling?

• Is defrosting operation going?

4) Operation ON/OFF by remote controller is disabled.

• Is forcible operation OFF mode set?

• Is any remote controller or external control working?

• Is auto address setting in progress?

(At the first power on or when indoor unit address is changed, operation control is disabled for

about 5 minutes after power on.)

BAre all cables/wiring set in the initial state?

CAre indoor unit and receiver unit connected correctly?

(2) Troubleshooting procedure

When an error occurs, check the unit in the following procedure.

→

Error

Check indication of lamps

Check faulty location and parts

(Note) Other than the check items in the table, malfunction or wrong diagnosis of microcomputer

due to effect of power or external noise is considered. If there is any source of noise, shield

the signal lines.

(a) Outline of judgment

The following describes the primary judgment of locating faulty unit (indoor unit or outdoor unit). (In

the case of group control operation, the header unit also indicates errors of follower unit by lamp.)

Judging from lamp status of indoor unit

The indoor unit monitors the operating status of air conditioner. When the protection circuit is

activated, the indoor unit indicates the following self-diagnosis contents.

: OFF

: ON

: Blinking (0.5 seconds interval)

Possible causes

Lamp indication

Check code

–

OPERATION TIMER PREPARING

Power OFF

Poor connection/contact between receiver/indication unit and

indoor unit control board

All OFF

Reception error

Transmission error

Communication error

Wired remote

controller

Wrong connection or

poor contact between

wired remote controller

and indoor unit

E01

E02

E03

E08

E09

E18

OPERATION TIMER PREPARING

Duplication of indoor unit No.

Duplication of remote controller header

Invalid setting

Poor connection/contact between indoor units or indoor unit

power OFF

Blinking

(Communication error between header and follower indoor

units or between twin header and follower indoor units)

Wrong connection or poor contact between indoor unit and

outdoor unit

(Communication error between indoor and outdoor units)

E04

P12

OPERATION TIMER PREPARING

Blinking

Failure of indoor unit DC fan (Protection device of indoor unit is

activated.)

OPERATION TIMER PREPARING

Alternate blinking

– 28 –

Troubleshooting (Continued)

Outline of judgment (Contenued)

Lamp indication

Check code

Possible causes

Abnormal outdoor unit discharge

temperature

P03

P04

(*) Protection device

of outdoor unit is

activated.

Outdoor unit high-pressure system error

OPERATION TIMER PREPARING

P19

P22

P26

P29

P31

Four-way valve system error (judged by indoor unit)

Outdoor unit: Malfunction of fan

Outdoor unit: Inverter Idc activated

Outdoor unit: Position detect error

Protection device of

outdoor unit is activated.

Alternate blinking

Header and follower indoor units in the group are not running

due to the following alarm.

(Alarm code: E03, L03, L07, L08)

F01

F02

F10

Heat exchange sensor (TCJ) error

OPERATION TIMER PREPARING

Indoor unit sensor error

Heat exchange sensor (TC) error

Room temperature sensor (TA) error

Alternate blinking

F04

F06

F08

Discharge temperature sensor (TD) error

Temperature sensor (TE, TS) error

Outside air temperature sensor (TO) error

OPERATION TIMER PREPARING

(*) Outdoor unit

sensor error

Alternate blinking

F29

Failure of indoor unit EEPROM

OPERATION TIMER PREPARING

Simultaneous blinking

H01

H02

H03

H06

Compressor breakdown

Compressor locking

Current detect circuit error

Outdoor unit low-pressure system error

OPERATION TIMER PREPARING

(*) Outdoor unit

compressor

system error

Blinking

Duplication of header indoor unit

Group connection indoor unit for

individual indoor unit

Group address not set

L03

L07

L08

L09

OPERATION TIMER PREPARING

→ ^{Auto address}

*If group configuration

or address at power on

is invalid, the unit

No setting (indoor unit capacity)

Simultaneous blinking

enters address setting

mode automatically.

L20

L29

L30

L31

Duplication of indoor unit collective address

Other errors of outdoor unit (*)

External interlock error

OPERATION TIMER PREPARING

Others

Phase sequence error

Simultaneous blinking

(*) Check code detected by outdoor unit is a typical example. It varies with outdoor unit of combination.

For details, see the Service Guide of applicable outdoor unit.

– 29 –

Others (Excluding check code)

Lamp indication

Check code

–

Possible causes

Trial operation in progress

OPERATION TIMER PREPARING

Simultaneous blinking

–

Invalid setting

OPERATION TIMER PREPARING

(Auto cooling/heating setting for auto cooling/heating

unavailable unit or heating setting for cool only unit)

Alternate blinking

Error mode detected by remote controller or central controller

Diagnosis function

Judgment and action

Check code

indication header indoor unit

(remote

controller

disabled)

Possible causes

Air conditioner status

Conditions

–

No communication with

OFF

Failure of remote controller power

supply or indoor unit EEPROM

1.Check remote controller wires.

2.Check remote controller.

3.Check indoor unit power wiring.

4.Check indoor unit P. C. board.

5.Check indoor unit EEPROM and

insertion into socket.

Remote controller is not

connected correctly.

Indoor unit is not powered

on.

Auto address setting is not

completed.

... Auto address repetition occurs.

E01

No communication with

header indoor unit

Disconnection between

OFF (auto reset)

*Operation

continues under

Indicated when an Remote controller signal reception error

error is detected

1.Check remote controller wires.

2.Check remote controller.

remote controller and header central control

indoor unit (detected by R/C)

3.Check indoor unit power wiring.

4.Check indoor unit P. C. board.

E02

E09

L20

Signal transmission error OFF (auto reset)

to indoor unit (detected by *Operation

Indicated when an Remote controller transmission error

error is detected

1.Check remote controller transmitter.

... Replace remote controller.

R/C)

continues under

central control

Multiple remote controller OFF (Follower R/C Indicated when an 1.Check for multiple remote

headers (detected by R/C) continues

operation)

error is detected

controller headers.

... One header only, others are

follower R/C.

Duplication of indoor unit OFF (auto reset)

collective address during

communication of central

control system

(detected by indoor unit/

central controller)

Indicated when an 1.Check central control network

error is detected address setting.

Central

controller

L20

–

Failure of central control

communication circuit

(detected by central

controller)

Operation

continues (following error is detected

R/C)

Indicated when an 1.Check communication line,

wrong connection, and indoor

unit power supply.

Central

controller

(Transmission)

C05

(Reception)

C06

2.Check communication circuit

(U3, U4, XY terminals).

3.Check central controller

(including central control R/C).

4.Check terminating resistors

(TCC-LINK).

–

Continue/OFF

(depending on

situation)

Indicated when an Check the unit's check code with

error is detected remote controller

Failure of indoor unit group

follower unit.

Central

controller

P30/b7

*2 No check code can be indicated by wired remote controller. (Normal operation of air conditioner cannot be controlled by wired remote controller.)

Check codes are indicated by the lamps for wireless models.

*3 This is an error related to communication of remote controller (A, B) or central control system (TCC-LINK U3, U4).

Remote controller indicates E01, E02, E03, E09, E18 or no code according to situation.

– 30 –

Troubleshooting (Continued)

Check Code Table (Indoor Unit)

– 31 –

Check Code Table (Outdoor Unit)

– 32 –

Troubleshooting (Continued)

Check CodeTable

Failure mode detected by indoor unit

Diagnosis function

Judgment and action

Check code

E03

Possible causes

Air conditioner status

Conditions

No signal reception from remote

controller

OFF

Indicated when an 1.Check remote controller wiring.

(auto reset)

error is detected

• No indication on remote controller

LCD (disconnection)

•

Central controller [C06] check code

E04

Serial signal from outdoor unit does OFF

Indicated when an 1.When outdoor unit does not work at all

not reach indoor unit.

• Wrong wire connection

(auto reset)

error is detected

• Check wires, correct wrong

connection.

• Failure of outdoor unit serial

transmitter

•

Check outdoor unit boards and wiring.

2.When outdoor unit works normally

• Failure of indoor unit serial

receiver

Check boards (indoor unit receiver,

outdoor unit transmitter)

E08

L03

L07

Duplication of indoor unit address

Duplication of header indoor unit

Group line in individual indoor unit

OFF

Indicated when an 1.Check remote controller connection

error is detected

(group/individual) change after

power on.

* If group configuration or address is

not correct, the unit enters auto

address setting mode automatically

for address re-setting.

L08

L09

Indoor unit group address not set

Indoor unit capacity not set

OFF

Indicated when an 1.Set indoor unit capacity (DN=11)

error is detected

L30

P12

External interlock alarm input

Failure of indoor unit DC fan

Indicated when an 1.Check external devices.

error is detected

Indicated when an 1. Position detect error

error is detected 2.Overcurrent protection circuit

2.Check indoor unit boards.

operation of indoor unit fan driver

3. Indoor unit fan lock

4. Check indoor unit boards.

P19

Failure of 4-way valve system

• Indoor unit heat exchange

temperature lowers after HEAT

operation starts.

OFF

(auto reset)

Indicated when an 1.Check 4-way valve.

error is detected 2.Check 2-way valve/check valve.

3.Check indoor unit heat exchanger (TC/TCJ)

4.Check indoor unit boards.

P31

F01

F02

F10

F29

E18

Indoor unit OFF during alarming to OFF

other indoor units

Indicated when an 1.Judging follower unit when header

unit is E03, L03, L07 or L08

(follower units) error is detected

(auto reset)

2.Check indoor unit boards.

Improper mounting, disconnection OFF

Indicated when an 1.Check TCJ.

or short-circuit of indoor unit heat

exchange sensor TCJ

(auto reset)

error is detected

2.Check indoor unit boards.

Improper mounting, disconnection OFF

Indicated when an 1.Check TC.

or short-circuit of indoor unit heat

exchange sensor TC

(auto reset)

error is detected

2.Check indoor unit boards.

Improper mounting, disconnection OFF

or short-circuit of indoor unit room (auto reset)

temp. sensor TA

Indicated when an 1.Check TA.

error is detected

2.Check indoor unit boards.

Failure of indoor unit EEPROM

• EEPROM access error

OFF

(auto reset)

Indicated when an 1.Check indoor unit EEPROM and

error is detected

insertion into socket.

2.Check indoor unit boards.

Communication error between

header and follower indoor units

OFF

(auto reset)

Indicated when an 1.Check remote controller wiring.

error is detected

2.Check indoor unit power wiring.

3.Check indoor unit boards.

– 33 –

Failure mode detected by outdoor unit (Representative codes)

• The check code used varies depending on the combination with the outdoor unit.

Diagnosis function

Judgment and action

Indicated when an 1.Check power voltages (200 20 VAC).

Check code

H01

Possible causes

Air conditioner status

Conditions

Compressor breakdown

OFF

• Compressor stops due to

error is detected

2.Freezing cycle overload operation

operating frequency decrease.

3.Check current detect circuit on the AC side

H02

Compressor does not work.

• Overcurrent protection circuit is

activated after a certain time from

compressor startup.

OFF

Indicated when an 1.Failure of compressor (lock, etc.)

error is detected ... Replace the compressor.

2.Improper compressor wiring (phase loss)

3.Lost-phase operation of power

supply (3-phase models)

H03

H06*1

L29

Failure of current detect circuit

• Large AC current even during

compressor OFF

OFF

Indicated when an 1.Operation stops soon when restarted

error is detected ... Check IPDU.

2.Lost-phase operation of power supply

Check 3-phase power voltages and wiring.

• Phase loss in power supply

Low-pressure switch ON

(applicable models)

COOL : 30 seconds

HEAT : 10 minutes

Indicated when an 1.Check freezing cycle (gas

error is detected

leakage).

2.Check low-pressure switch circuit.

3.Check outdoor unit CDB board.

Other outdoor unit errors

Indicated when an 1.Check CDB/IPDU wiring.

error is detected 2.Freezing cycle overload operation

• CDB-IPDU communication error

(connector disconnection)

• Abnormal heatsink temperature

(over specified value)

L31*1

Phase detection protection circuit

activated (normal models)

Operation

continued

(compressor

OFF)

Indicated when an 1.Check phase sequence, reverse

error is detected

phase, and phase loss.

2.Check outdoor unit boards.

3.Check high-pressure switch.

4.Check high-pressure switch circuit wiring.

P03

P04

Abnormal discharge temperature

(over specified value)

OFF

Indicated when an 1.Check freezing cycle (gas leakage).

error is detected

2.Failure of electronic expansion valve

3.Check piping sensor (Td).

Failure of high-pressure protection circuit OFF

(Temperature over specified value

detected by TE sensor)

Indicated when an 1.Freezing cycle overload operation

error is detected

2.Check outdoor unit TE sensor.

3.Check outdoor unit CDB board.

4.Check high-pressure switch and circuit.

High-pressure switch (normal models)

P22

Failure of outdoor unit DC fan

OFF

Indicated when an 1.Position detect error

error is detected 2.Overcurrent protection circuit

operation of outdoor unit fan driver

3.Outdoor unit fan lock

4.Check outdoor unit CDB board.

P26

P29

F04

F06

F08

Inverter overcurrent protection

circuit activated (short time)

Main circuit short voltage operation

OFF

Indicated when an 1.Operation stops soon when restarted.

error is detected

... Compressor partial short-circuit

2.Check IPDU for improper wiring.

Failure of IPDU position detect

circuit

Indicated when an 1.The circuit is activated even after

error is detected

compressor’s 3P connector is

disconnected. ...Replace IPDU.

Improper mounting, disconnection OFF

or short-circuit of outdoor unit temp.

sensor TD

Indicated when an 1.Check TD.

error is detected

2.Check outdoor unit CDB board.

Improper mounting, disconnection OFF

or short-circuit of outdoor unit temp.

sensor TE, TS

Indicated when an 1.Check TE, TS.

error is detected

2.Check outdoor unit CDB board.

Improper mounting, disconnection Operation

Indicated when an 1.Check TO.

or short-circuit of outdoor unit

continued

error is detected

2.Check outdoor unit CDB board.

outside air temp. sensor TO

*1 ROA-P*** is not detected by 1HS models.

Fan continues rotating in a failure mode detected by outdoor unit because there is no communication between outdoor unit

and follower indoor unit in twin group.

– 34 –

Troubleshooting (Continued)

2. Troubleshooting by Remote Controller Check Indication

Main Remote Controller (RBC-AMT31E)

(1) Checking

When an error occurs in the air conditioner, a

check code and an indoor unit number appear

on the LCD of remote controller.

Check code is displayed only during

operation.

If indication disappears, check errors following

Faulty indoor unit

No.

Check code

“Checking Error Log” below.

(2) Checking Error Log

When an error occurs in the air conditioner, error log can be checked following the steps below. Up to 4

errors are memorized.

Error log can be checked in both operation ON and OFF states.

Step

Operation

Press [SET] and [TEST] at the same time for 4 seconds or more. The LCD indication changes as shown below.

Indication of “SERVICE CHECK” shows that the unit is in the error log mode.

• Code No. “01” (order of error log) is displayed.

• A check code is displayed.

• The address of faulty indoor unit is displayed in the UNIT No. area.

Each pressing of TEMP. ∆/∇ buttons displays stored error log sequentially.

Check code “01” shows the latest error, and “04” shows the oldest.

Note

Do not press [CL] as this button clears entire error log of indoor unit.

After checking the error log, press [TEST] to return to the normal indication.

Numbers appearing on the LCD

<Seven-segment display>

Hexadecimal number

– 35 –

TCC-LINK Central Control Remote Controller (TCB-SC642TLE)

(1) Checking

When an error occurs in the air conditioner, a

check code and an indoor unit number appear on

the LCD of remote controller.

Indication of unit number

Indication of alarm

CHECK

UNIT No.

Check code is displayed only during operation.

If indication disappears, check errors following

“Checking Error Log” below.

Alternate blinking

R.C.

No.

(2) Checking Error Log

When an error occurs in the air conditioner, error log can be checked following the steps below. Up to 4

errors are memorized.

Error log can be checked in both operation ON and OFF states.

APress [SET] and [TEST] at the same time for 4 seconds or more.

BIndication of “SERVICE CHECK” and UNIT No. “01” appear.

CWhen selecting a group number (blinking), a unit number and the latest error log, if any, are displayed

alternately.

* Temperature setting is disabled at this time.

Indication of unit number

UNIT No.

Indication of alarm

CHECK

Alternate blinking

R.C.

No.

DTo check other errors, choose a code (01 to 04) with TEMP. ∆/∇ buttons.

ETo check error log of another group, choose a group number with / buttons.

Do not press [CL] as this button clears entire error log of the selected group.

FPress [TEST] to finish the service check.

– 36 –

Troubleshooting (Continued)

3. Troubleshooting for Each Check Code

Check code

Check code name

Possible causes

AImproper R/C wire connection

BFailure of I/U power supply

CFailure of I/U board

[E01]

(New code)

I/U - R/C communication error

(detected by R/C)

DInvalid R/C address setting

EFailure of R/C board

Are R/C wires

A/B correct?

Correct R/C wires.

YES

Improper harness

connection from

I/U terminal block?

YES

Correct connector connection.

Check circuit wiring.

Group control

operation?

YES

Are all indoor

units powered ON?

Check I/U power connection

(power off and on).

YES

Check I/U boards.

→ Replace defective board.

Is R/C powered ON?A/B

terminals: Approx. 18VDC

YES

Is “no header”

set by double R/C?

Correct one header/one follower.

(R/C address connector)

YES

Check R/C board.

→ Replace it if necessary.

– 37 –

Check code

Check code name

Possible causes

[E02]

(New code)

R/C transmission error

Signal transmission to indoor unit is

disabled.

* Not indicated on the central controller and outdoor unit 7-segment.

Com. cable between

R/C and I/U connected

properly?

Correct communication cable.

YES

Failure of R/C

transmitter → Replace R/C.

Check code

Check code name

Possible causes

No communication from R/C and communication adapter.

[E03]

I/U - R/C communication error

(New code)

(detected by I/U)

Indoor unit (I/U) detects this error when it cannot receive signals from remote controller (R/C).

Check communication wiring of R/C A and B.

This code E03 is not displayed on the R/C because of communication error.

This code is displayed on the TCC-LINK central controller.

– 38 –

Troubleshooting (Continued)

Check code

Check code name

Possible causes

[E04]

(New code)

I/U - O/U communication error

(detected by I/U)

AImproper connector connection between I/U and O/U

BImproper wire connection between I/U and O/U

CFailure of I/U or O/U board

DCase thermo sensor ON

EInvalid I/U board switch setting

Does O/U work?

Is group address set correctly?

YES

Check code “14”.

Correct wires.

YES

Are 1/2/3 wires normal?

YES

Are connectors from I/U and

O/U connected normally?

Correct connector connection.

YES

Is I/U switch SW02

setting correct? Bit 1, 2: OFF

Correct switch setting on

MCC-1510 board.

YES

Does voltage between

I/U terminal 2 and 3 fluctuate?

(0-140 VDC)

Check MCC-1510 board.

→ Replace it if necessary.

* Measure within

20 seconds

from power on.

Black

White

YES

Is 280VDC

Terminal block

applied across IPDU main

circuit capacitor?

Replace IPDU.

YES

Is 280VDC supplied to

CDB? (CN03)

Replace IPDU.

YES

Is 7VDC supplied

to CDB? Is CN06-CN800

connection normal?

Replace IPDU.

Correct connector connection.

YES

Is case thermo sensor

connected? (CN500)

Correct connector connection.

YES

Check MCC-1510 board.

→ Replace it if necessary.

Check CDB. → Replace it if

necessary.

Is case thermo sensor working?

YES

Check I/U boards.

® Replace defective board.

Check and correct refrigerant volume.

– 39 –

Check code

Check code name

Possible causes

R/C header setting is duplicated.

[E09]

Duplication of R/C header

(New code)

Are 2 headers set

by double R/C?

YES

Correct one header/one follower.

(R/C address connector)

Check R/C board.

→ Replace it if necessary.

Check code

Check code name

Possible causes

[E18]

Communication error between header AImproper wire connection between I/U

(New code)

and follower I/U

BImproper wire connection between I/U and O/U

CFailure of I/U board

DInvalid I/U board switch setting

Are A/B wires

normal?

Correct R/C wire connection.

YES

Improper harness

connection from I/U terminal

block?

YES

Correct connector connection.

Check circuit wiring.

Is I/U switch SW02

setting correct?

Bit 1, 2: OFF

Correct switch setting on

MCC-1510 board.

YES

Group control operation?

YES

Are all indoor

units powered ON?

Check I/U power connection

(power off and on).

YES

Twin or triple control?

YES

Improper signal

connection between I/U

and O/U?

YES

Correct signal wire connection

between I/U and O/U.

Check MCC-1510 board.

→ Replace it if necessary.

– 40 –

Troubleshooting (Continued)

Check code

Check code name

Possible causes

[F01]

I/U sensor TCJ error

(New code)

Is TCJ connector

CN102 connected

normally?

Correct connector connection.

YES

Is TCJ resistor

characteristic

normal?

Replace sensor TCJ.

* See I/U temp. sensor characteristics-2.

YES

Check I/U main board.

→ Replace it if necessary.

Check code

Check code name

Possible causes

Sensor TC open or short-circuit

[F02]

I/U sensor TC error

(New code)

Is TC connector

CN101 connected

normally?

Correct connector connection.

YES

Is TC resistor

characteristic

normal?

Replace sensor TC.

* See I/U temp. sensor characteristics-2.

YES

Check I/U boards.

→ Replace defective board.

– 41 –

Check code

Check code name

Possible causes

Sensor TA open or short-circuit

[F10]

I/U sensor TA error

(New code)

Is TA connector

CN104 connected

normally?

Correct connector connection.

YES

Is TA resistor

characteristic

normal?

Replace sensor TA.

* See I/U temp. sensor characteristics-1.

YES

Check MCC-1510 board.

Replace it if necessary.

Check code

Check code name

Possible causes

[F29]

Other indoor unit errors

Failure of I/U board

(New code)

This is an error of non-volatile EEPROM IC10 on the indoor unit board, which occurs during

operation. Replace the service board.

* If EEPROM is not mounted at power on or if no data can be read/written from/in the EEPROM,

auto address mode is repeated. At this time, the AI-NET central controller indicates code “97”.

(About 3 minutes)

(Power on)

(About 1 minutes)

“SETTING” appears

on the R/C.

Reboot

(reset)

LED (D02) on the I/U

board blinks for about

10 seconds (1Hz).

“SETTING” disappears.

(Repeated)

– 42 –

Troubleshooting (Continued)

Check code

Check code name

Possible causes

[F31]

O/U EEPROM error

AFailure of O/U power supply (voltage, noise, etc.)

(New code)

BFailure of O/U CDB board.

Check power voltage.

Improve power lines.

Check external noise.

Is O/U free from

power fluctuation?

YES

Check CDB board.

Check code

[E08][L03][L07][L08]

(New code/old code)

E08: I/U number duplicated

L03: Multiple header I/U under group control

L07: One or more group address “individual” under group control

L08: I/U group address not set (99)

When any of these codes is detected at power on, the unit enters auto address setting mode

automatically. (No code is indicated.)

However, if any of these codes is detected in the auto address setting mode, a check code is

displayed in some cases.

Check code

Check code name

Possible causes

Indoor unit capacity not set

[L09]

Indoor unit capacity not set

(New code)

Is indoor unit

capacity set?

Set I/U capacity data. (DN=11)

YES

Check MCC-1510 board.

→ Replace it if necessary.

– 43 –

Check code

Check code name

Possible causes

[L20]

Duplication of central control address

Central control address is duplicated.

(New code)

Are U3/U4

communication

cables connected

normally?

Correct cable connection.

YES

When a unit

connected to U3/U4

is in a group, is it set

to header unit?

Set the connected unit to

header unit.

YES

Check and correct I/U address,

central control address.

Check code

Check code name

Possible causes

When an external alarm is input

[L30]

I/U external interlock

(New code)

Is external device

connected to CN80?

Check I/U boards.

→ Replace defective board.

YES

Check external device.

→ Replace it if necessary.

Is external device

working normally?

YES

Check possible error

causes.

– 44 –

Troubleshooting (Continued)

Check code

Check code name

Possible causes

AFailure of fan motor connector

[P12]

Malfunction of I/U fan motor

(New code)

BFailure of fan motor

CFailure of I/U board

DFailure of cross flow fan shaft

Turn OFF the breaker.

Turn it ON 10 seconds

after.

Is min.1VDC present

Does fan stop with

operation OFF?

between CN210 pin

and C

Replace I/U fan

motor.

YES

Start cooling with LOW

fan speed.

Is min. 280VDC present

between CN210 pin

Does fan rotate?

YES

and C

YES

Stop operation and turn OFF

breaker. Disconnect CN210,

turn ON breaker again, and

then stop operation using R/C.

Is min. 15VDC present

between CN210 pin

Change fan speed to HH.

and C with

motor connected?

YES

Is min. 280VDC present

between CN210 pin

Replace I/U MCC-

1510 board.

and

YES

Operate I/U (except

heating) by R/C. Is min.

1VDC present between

Stop operation and unplug

AC cord. Disconnect

CN210, plug in AC cable

again, and then stop

operation using R/C.

CN210 pin

and

?(Measure within

15 seconds.)

Does fan speed

increase?

YES

Operate I/U (except

heating) by R/C. Is min.

1VDC present between

YES

Does cross flow fan

rotate normally by hand?

CN210 pin

and

? (Measure within

15 seconds.)

YES

Repair cross flow

fan shaft.

Rotate the fan by hand with

operation OFF. Is 0 to

15VDC (rev return signal)

generated between CN210

and

Fan motor is normal.

YES

– 45 –

Check code

Check code name

Possible causes

AFailure of fan motor connector

[P12]

Malfunction of I/U fan motor

(New code)

BFailure of fan motor

CFailure of I/U board

DFailure of cross flow fan shaft

When AC cord is plugged

in, I/U fan starts rotating.

P. C. board

Check the fan motor output DC voltage on the I/U board.

(Blue)

(Yellow)

(White)

(Black)

Check voltage on the motor connector CN210 pin C(GND,

black) and pin E(+V line, yellow) while fan is rotating.

Yellow

1.0VDC or

higher

Below 1.0VDC

Black

Failure of I/U

MCC-1510 board

Failure of I/U fan

motor

(Red)

– 46 –

Troubleshooting (Continued)

Check code

Check code name

Possible causes

[P31]

Other I/U errors

When an error occurs with other units in the group

(New code)

(Group follower I/U error)

When header unit detects E03, L03, L07 or L08 during group operation, “P31” is indicated on follower units in the group and

their operation stops. No code or alarm log is displayed on the R/C.

– 47 –

Check code

Check code name

Possible causes

[C05], [C06]

(Central controller)

TCC-LINK central control

communication error

TCC-LINK central control communication error

Is I/U

powered ON?

Power ON.

YES

Is harness from I/U

terminal block

connected properly?

Correct connector connection.

YES

Can I/U be

operated by R/C

individually?

YES

Are U3/U4 com.

cables. normal?

Correct com. cable.

* Check wrong connection, disconnection, and

shield wire’s contact with com. cable.

YES

When a unit

connected to U3/U4

is in a group, is it

set to header

unit?

Set the connected unit to

header unit.

YES

Free from noise?

YES

Remove noise source.

Can other units

controlled by

central R/C? Is I/U

operating status

reflected?

Check central controller.

→ Replace it if necessary.

YES

Is the code [C05]?

YES

Confirm normal connection of

com. cable. Change connector

connection CN40 to CN44

(EMG) on I/U board.

Is I/U onboard fuse

F03 normal?

YES

Check I/U boards.

→

Replace

defective board.

– 48 –

Troubleshooting (Continued)

Relationship Between Temperature Sensor Resistance and Temperature

Characteristic-1

Characteristic-2

Sensor TC, TCJ

Sensor TA

Resistance

]

Resistance

]

-10

Temperature

[˚C]

Characteristic-3

Sensor TE, TO, TS

200

Resistance

(10°C or lower)

]

(10°C or higher)

100

-10

Temperature [˚C]

Sensor TD

Characteristic-4

200

Resistance

(50°C or lower)

Resistance

]

(50°C or lower)

100

Temperature

[˚C]

– 49 –

9. HOW TO REPLACE SERVICE BOARD OF INDOOR UNIT

Requirements When Replacing Service Board of Indoor Unit

The non-volatile EEPROM (IC10) on the board of indoor unit stores important data such as model-specific type and capacity

code (written during factory shipping) as well as system/indoor unit/group addresses set automatically/manually (written during

installation). Therefore, observe the following procedure when replacing indoor unit service boards.

After installation of indoor unit, check whether the settings are correct by checking indoor unit number and group header/

follower unit setting, and also check cycle through a trial operation.

[Replacement Procedures]

Case 1

When it is possible to power ON indoor unit before replacement and when wired R/C can read settings

Reading EEPROM Data *1 (see page 51)

Replacing Service Board and Power ON *2 (see page 51)

Writing Setting Data in EEPROM *3 (see page 52)

Power ON reset (for all indoor units connected to R/C in group control mode)

Case 2

When it is impossible to power ON indoor unit before replacement or when wired R/C is disabled

due to failure of power supply circuit (board failure)

Replacing EEPROM (For layout of components and replacement, see page 49.)

Remove the EEPROM on the board, and replace it with the EEPROM on the service board.

Replacing Service Board and Power ON *2 (see page 51)

Reading EEPROM Data *1 (see page 51)

If data cannot be read, go to Case 3.

Replacing EEPROM (For layout of components and replacement, see page 49.)

Replace EEPROM again. (Mount the original EEPROM on the service board.)

Replacing Service Board and Power ON *2 (see page 51)

Writing Setting Data in EEPROM *3 (see page 52)

Power ON reset (for all indoor units connected to R/C in group control mode)

Case 3

When the EEPROM before replacement is defective, and the settings cannot be read

Replacing Service Board and Power ON *2 (see page 51)

Writing Setting Data in EEPROM (using customer information) *3 (see page 52)

Power ON reset (for all indoor units connected to R/C in group control mode)

– 50 –

HOW TO REPLACE SERVICE BOARD OF INDOOR UNIT (Continued)

*1 Reading EEPROM Data

(Read EEPROM data that was updated at site in addition to factory setting.)

1) Press

* In the group control mode, the header unit number is displayed first.

At this time, code (DN) is displayed, and the fan of the selected indoor unit runs, its flap swings,

and the OPERATION, TIMER, and PREPARING lamps blink.

, and

on the R/C simultaneously for 4 seconds or more.

(see page 52)

2) Each pressing of

indicates indoor unit number in the group sequentially.

Specify indoor unit number whose board is to be replaced.

3) Each pressing of TEMP.

4) Change DN from to

buttons increments or decrements DN.

first. (Setting of filter sign ON time)

Write down the setting data displayed.

5) Change DN with TEMP.

buttons, and write down the setting data displayed.

6) Repeat step 5) in the same way, and write down the important setting data shown in the table

(page 49).

* DN =

. DN does not always shift sequentially.

to return the operation mode to normal OFF.

7) After writing down setting data, press

(It takes about one minute until R/C operation is enabled.)

Essential DN codes

(1) Indoor unit capacity is necessary for fan speed setting.

(2) If refrigerant line address, indoor unit address or group

address differs from that before replacement, the unit enters

auto address setting mode, which requires manual re-setting

for group operation including twin or triple operation.

Description

11 Indoor unit capacity

12 Refrigerant line address

13 Indoor unit address

14 Group address

*2 Replacing Service Board and Power ON

1) Replace the board with a service board.

Reflect the jumper wire (cut) setting and switch setting on the board in the service board. For switch

setting and component layout, see page 53.

2) Power ON the indoor unit in either way of the following according to system configuration.

a) Single (individual) operation

Power ON the indoor unit with no operation.

i) Go to *3 when auto address setting mode ends (about 5 minutes).

(Refrigerant line address=1, indoor unit address=1, and group address=0 are set automatically.)

ii) Press

, and

on the R/C simultaneously for 4 seconds or more ( ) to cancel auto

address setting mode, and then go to *3. (UNIT No.

is indicated.)

b) Group operation (including twin/triple/double twin)

Power ON the indoor unit whose service board is replaced in either way of the following.

i) Power ON the indoor unit only whose service board is replaced in the same way as a) i) and ii)

above.

There must be remote controller connection. If not, operation *3 is disabled.

ii) Power ON multiple indoor units including the unit whose service board is replaced.

• Twin, triple, double twin: One system only

• Group control: All indoor units

Go to *3 when auto address setting mode ends (about 5 minutes).

* Header indoor unit may change depending on auto address setting. The refrigerant line address and

indoor unit address of the indoor unit whose service board is replaced are automatically set to an

address that is not used in other units. It is recommended that you take a memo beforehand that to

which refrigerant system the indoor unit belongs and that the indoor unit is header or follower unit in

the group.

– 51 –

*3 Writing Setting Data in EEPROM

(The data of the EEPROM on the service board is the factory setting data.)

1) Press

, and

on the R/C simultaneously for 4 seconds or more.

(see page 52)

* In the group control mode, the header unit number is displayed first.

(If auto address setting mode is canceled in 2-2) a) ii) above, UNIT No.

is indicated.)

At this time, code (DN)

is displayed, and the fan of the selected indoor unit runs, its flap swings,

and the OPERATION, TIMER, and PREPARING lamps blink.

2) Each pressing of

indicates indoor unit number in the group sequentially.

Specify indoor unit number whose board is replaced.

(This operation is disabled if UNIT No. is

3) Each pressing of TEMP.

buttons increments or decrements DN.

4) Set the indoor unit capacity first.

The factory setting data is written in the EEPROM.

i) Change DN to

ii) Set the indoor unit capacity with TIME

with TEMP.

buttons.

(for

RBC-AMT21E

example, “0012” for 80 class) ... See the table (page 53).

iii) Press

iv) Press

Indication on the LCD shows normal operation.

to return the operation mode to normal OFF.

(It takes about one minute until R/C operation is enabled.)

SETTING

5) Write the data set after installation (such as address) in the EEPROM.

Repeat steps 1) and 2) above.

6) Specify DN

sign ON time)

with TEMP.

buttons. (Setting of filter

7) Check the displayed data comparing the content written down in *1

(page 49).

i) If the data is incorrect, change it with TIME

buttons to the

data of the memo, and then press

normal operation.

Indication on the LCD shows

ii) No operation is required for the same data.

8) Change DN with TEMP.

buttons.

RBC-AMT31E

In the same way as above, check the displayed data comparing the

content of the memo.

If the data is incorrect, change it to the data of the memo.

9) Repeat steps 7) and 8) above.

10) When the setting is completed, press

to return the operation

mode to normal OFF.

(It takes about one minute until R/C operation is enabled.)

* DN =

updated and

restored with

. DN does not always shift sequentially. Even if data is

button is pressed by mistake, the previous data can be

button unless DN is changed.

– 52 –

HOW TO REPLACE SERVICE BOARD OF INDOOR UNIT (Continued)

Example of Setting Contents to be Written Down (Code Table)

Item

Memo

Factory setting

0001: 150 hours

01 Filter sign ON time

02 Filter contamination level

03 Central control address

06 HEAT intake temp. shift

0C PREPARING indication selection

0F COOL only

0000: Average

0099: Not determined

0002: +2°C

0000: Normal

0000: Heat pump type air conditioner

0008: Wall type

10 Type

Must be set to 0008

11 Indoor unit capacity

Depends on capacity type

0099: Not determined

0003: 3°C (Ts 1.5)

0000: Not provided

0002: External alarm input

0000: Thermo output ON

0000: Operation input

0000: Disabled

12 Refrigerant line address

13 Indoor unit address

14 Group address

1E Temp. range at COOL/HEAT auto switching control

28 Auto restart after power failure

2A Option/alarm input (CN80) selection

2b Thermo output (T10-C) selection

2E HA terminal (T10-A) selection

31 Ventilation fan (single operation)

32 Sensor selection

0000: Unit sensor

60 Timer setting (wired R/C)

69 Flap setting for cooling

0000: Available

0000: Normal

8b Correction of feeling of strong heating

0000: Not provided

Indoor unit capacity

Code “11”

Onboard Component Layout

<MCC-1510>

Model

Invalid

40 type

Setting data

0000*

0006

0007

0008

SW02

SW01

0009

DIP switches

(SW01, SW02)

0010

J01

0011

0012

* Default value of EEPROM on the

service board

IC10

EEPROM (IC10)

Mount EEPROM aligning its notch with

the notch of IC socket.

Notch

DIP switch setting

IC socket

Notch

EEPROM

Setting

AIK-AP**1H

Factory setting

Bit 1

Bit 2

Bit 1

Bit 2

Terminating resistor (for central control)

Selection of R/C A or B

OFF (no resistor)

OFF (A is selected)

OFF (custom models)

OFF

SW01

SW02

Selection of custom or multiple

Not used

OFF

*1: Set to the state before replacement

– 53 –

10. ON-SITE SETTING AND OTHERS

1. Indoor Unit

1.1 Trial Operation Setting by Remote Controller only.

The lamps on the unit blink during trial operation.

Press

on the R/C for 4 seconds. When “TRIAL OPERATION” appears on the LCD, press

• “TRIAL OPERATION” appears on the LCD during trial operation.

• Trial operation disables temperature control, but allows fan speed control.

• An instruction of fixed frequency is issued for cooling and heating of trial operation.

• Alarm detection is performed as usual.

The trial operation mode must be used for its original purpose only, because it stresses the air conditioner.

Choose COOL or HEAT mode only for trial operation.

• (Note) Outdoor unit does not run about 3 minutes after power on or operation stop.

Repress

after trial operation and confirm that “TRIAL OPERATION” disappears from the LCD.

Wired remote controller has 60-minute timer reset function to prevent continuous trial operation.

Checking wiring and piping of indoor/outdoor units

1. Open the front panel of the indoor unit.

2. Press [TEMPORARY] button for 10 seconds. The unit enters forcible cooling mode with a sound

“pi”. COOL operation starts forcibly about 3 minutes later. Check whether cool air is discharged. If

COOL operation does not start, recheck the wiring.

3. Repress [TEMPORARY] for about one second to stop trial operation. The vertical airflow flap

closes and the operation stops.

Checking signal transmission from R/C

1. Press [ON/OFF] on the R/C to check for normal operation using R/C.

• To enter AUTO mode, press [TEMPORARY] once

for about one second.

For forcible cooling, press [TEMPORARY] for 10

seconds or more.

• COOL operation specified by R/C may not start

depending on temperature conditions.

Use forcible cooling operation to check wiring and

piping of indoor/outdoor units.

[TEMPORARY]

button

– 54 –

ON-SITE SETTING AND OTHERS (Continued)

1.2 Forcible Defrost Setting by Remote Controller (wired R/C only)

Preliminary operation

Press

, and

at the same time for 4 seconds or more in the OFF mode.

In the group control mode, the header unit number is displayed first.

Each pressing of

indicates indoor unit number in the group sequentially.

Choose the main indoor unit (connected to the outdoor unit) for which forcible defrosting is to be

performed.

The fan and flap of the selected indoor unit start working.

Specify DN “8C” with

Set data 0001 with

buttons.

buttons. (Factory setting: 0000)

Press

Indication on the LCD shows normal operation.

to return the operation mode to normal OFF.

Execution procedure

• Press

on the R/C.

• Choose HEAT operation mode.

• After a while, a forcible defrosting signal is transmitted to the outdoor unit. Upon receiving the signal, the

outdoor unit starts defrosting. It takes up to 12 minutes.

• On completion of defrosting, the indoor unit restart HEAT operation.

To reexecute defrosting, repeat steps from step

above.

Once forcible defrosting is performed, the above setting for forcible defrosting is reset.

1.3 Indication of Onboard LEDs

1. D02 (red)

Lights up by the control of main microcomputer when the indoor unit is powered on.

Blinks at intervals of one second (0.5-second on and off) when EEPROM is not mounted or write

error occurs.

Blinks at intervals of 10 seconds (5-second on and off) in the DISP mode. (CN72 short-circuited at

power on)

Blinks at intervals of 2 seconds (1-second on and off): Applicable unit in the EEPROM setting

(address, function selection, etc.) mode

2. D203 (red)

Lights up by hardware control when power is supplied to remote controller.

– 55 –

1.4 JRA Capacity Measurement Mode (wired R/C only)

Preliminary operation

Press

, and

at the same time for 4 seconds or more in the OFF mode.

In the group control mode, the header unit number is displayed first.

Each pressing of indicates indoor unit number in the group sequentially.

Choose the main indoor unit (connected to the outdoor unit) for which this control is to be performed.

The fan and flap of the selected indoor unit start working.

Specify DN “91” with

buttons.

buttons. (Factory setting: 0000)

Set the following data with

Data

Rating 0001

Middle 0002

Press

Indication on the LCD shows normal operation.

to return the operation mode to normal OFF.

Operation Fan speed Setting temp. Flap position

Use this mode to measure JRA capacity.

Use this mode under the conditions of JIS B8615-1

Perform the settings in the table by remote

Cooling

Heating

Quick high

Auto

18°C

29°C

23°C

24°C

Horizontal angle

Cooling rating

Heating rating

Cooling middle

Heating middle

Auto Cooling

controller

Execution procedure

• Press on the R/C.

Auto

To reexecute JRA capacity measurement, repeat steps from step

Once this measurement is completed, the above setting is reset.

above.

1.5 Function Select Setting (wired R/C only)

Perform the following steps in the operation OFF mode.

Press

, and

at the same time for 4 seconds or more in

the OFF mode.

In the group control mode, the header unit number is displayed

first.

Each pressing of

sequentially.

indicates indoor unit number in the group

Choose the main indoor unit (connected to the outdoor unit) this

function is to be performed.

The fan and flap of the selected indoor unit start working.

Specify DN with

buttons.

Operation procedure

END

Set the setting data with

buttons.

Press

Indication on the LCD shows normal operation.

• To change the selected indoor unit, go to

• To change the item to be set, go to

Press

to return the operation mode to normal OFF.

– 56 –

ON-SITE SETTING AND OTHERS (Continued)

Function Select Code (DN) Table

Item

Description

0001: 150H

Factory setting

0001: 150H

Filter sign ON time

0000: None

0002: 2500H

0004: 10000H

0003: 5000H

0005: Clogging sensor used

Filter contamination level

Central control address

HEAT intake temp. shift

0000: Average

0001: Heavy

0000: Average

(half of standard time)

0001: No. 1

0099: Not determined

0064: No. 64

0099: Not determined

0002: +2 °C

0000: No shift

0001: +1 °C

0002: +2 °C

0010: +10 °C

(Up to +6 recommended)

PREPARING indication selection

COOL only

0000: PREPARING indicated 0001: No indication

0000: PREPARING

indicated

0000: Heat pump

0001: COOL only

(No “AUTO”, “HEAT”

0000: Heat pump

indication)

Type

0000: (Ceiling panel 1)

0000: Not determined

0001 (ceiling panel 4) -

0037

0008: Wall type

Indoor unit capacity

0001 - 0034

Depends on capacity

type

Refrigerant line address

Indoor unit address

Group address

0001: No. 1

0030: No. 30

0099: Not determined

0001: No. 1

0064: No. 64

0000: Individual

0001: Group header

0002: Group follower

Temp. range at COOL/HEAT auto

switching control

0000: 0deg

(Switching at set temperature (data)/2)

0010: 10deg

0033: 3deg (Ts 1.5)

Auto restart after power failure

0000: Not provided

0001: Provided

0000: Not provided

Option/alarm input (CN80)

selection

0000: Filter input

0002: External alarm input

0001: Alarm input

0002: External alarm

input

Thermo output (T10-3) selection

0000: I/U thermo sensor ON 0001: O/U compressor ON

output

0000: I/U thermo

sensor ON

HA terminal (T10-1) selection

0000: Normal (JEMA)

0002: Fire alarm input

0001: Card input

0000: Normal

(HA terminal)

Ventilation fan (single operation)

Sensor selection

0000: Disabled

0001: Enabled

0000: Disabled

0000: Unit sensor

0000: Available

0000: Normal

0000: Unit sensor TA

0000: Available

0000: Normal

0001: R/C sensor

0001: Unavailable

0001: Down allowed

0001: Provided

Timer setting (wired R/C)

Flap setting for cooling

Correction of feeling of strong

heating

0000: Not provided

– 57 –

1.6 Wiring and Setting for Remote Controller

Double R/C control (when controlling by two remote controller switches)

This control is provided to control one or more indoor units by two remote controllers. Up to 2 remote

controllers can be installed.

No setting is required when using in combination with a wireless remote controller .

Controlling one indoor unit by 2

remote controllers

R/C switch R/C switch

(header)

Option

A B

(follower)

Option

A B

R/C wiring (on-site arrangement)

R/C wiring terminals

A B

Indoor unit

1 2 3

Outdoor unit

Setting

This control is provided to control one or more indoor units by two remote controllers.

Up to 2 remote controllers can be installed.

Remote controller (back, inside)

Setting to use a wired remote controller

as follower R/C:

Change the setting of DIP switch on the

back of R/C switch to “R/C follower” as

shown in the figure.

R/C follower

R/C header

DIP switch

– 58 –

ON-SITE SETTING AND OTHERS (Continued)

1.7 Monitoring Function of Remote Controller Switch

■Calling indication of sensor temperature

Calls the service monitor mode from the remote controller to

monitor sensor temperatures of the remote controller, indoor units,

and outdoor unit.

Press

and

on the R/C simultaneously for 4 seconds or more

to call the service monitor mode.

“Service monitor” lights up and the header indoor unit number is

displayed first, and then temperature of code “ ” is displayed.

Choose a sensor number (code) you want to monitor with

buttons.

The following table lists sensor numbers.

Code

Data

Code

Data

00 Room temp. under control *1

01 Room temp. (R/C)

60 Heat exchange temp. TE

61 Outside air temp. TO

62 Discharge temp. TD

63 Intake temp. TS

Returns to normal indication.

Operation procedure

02 Indoor unit intake temp.

03 Indoor unit coil temp. TCJ

04 Indoor unit coil temp. TC

05 Indoor unit coil temp. TC1

–

65 Heatsink temp. THS

*1 Header indoor unit only under group control

Choose an indoor unit you want to monitor with

units and outdoor unit in the same control group.

button to monitor sensor temperatures of indoor

Press

to return to the normal indication.

– 59 –

■Calling error log

Calls past errors.

Press

and

on the R/C simultaneously for 4 seconds or more

to call the service check mode.

“Service check” lights up and code

the latest error.

is displayed first to display

The faulty indoor unit number and error content are displayed.

To monitor other errors, change error log number (code) with

buttons.

Code

(latest) → Code

(oldest)

Note) Up to 4 errors are memorized in the error log.

Returns to normal indication.

Operation procedure

Press

to return to the normal indication.

Do not press

as this button clears entire error log of indoor unit.

– 60 –

ON-SITE SETTING AND OTHERS (Continued)

Group control allows operation control of up to 8 indoor units using one remote controller. It includes twin,

triple, and double twin controls with one outdoor unit.

The indoor unit connected to outdoor unit controls room temperature according to the R/C setting.

O/U

I/U

O/U

I/U

O/U

I/U

O/U

Header

2-1

I/U

1-1

3-1

3-2

4-1

7-1

8 units maximum

R/C

(1) Scope of R/C indication

The indoor unit setting range (operation mode/fan speed/temperature) set in the header unit is

reflected in the remote controller.

ADo not set a concealed duct high static pressure type (AID-P***1H) for header unit.

• If the type is set as header unit, settings are as follows.

Operation mode: [Auto cooling/heating], [HEAT], [COOL] or [FAN] without [DRY]

Fan speed

: [HH]

• In the DRY operation mode, FAN mode is not available for duct models.

BDo not set a “COOL only” model for header unit.

• [Auto cooling/heating] and [HEAT] operation modes are not available.

(2) HA

Both indoor and outdoor units are compatible with the remote control HA.

Operation ON/OFF control for entire group is available.

AMultiple HA inputs in one group are not allowed.

(3) Address setting

If there is no serial data communication between indoor and outdoor units at power on, the indoor unit

is regarded as twin follower unit. (Each time of power on)

... Recognition of twin header (main)/follower (sub) is carried out at each power on, and the result is

not stored in the non-volatile memory.

When performing auto address setting, power on the indoor units in a control group within 3 minutes.

... If powered on after 3 minutes when auto address judgment is completed, the unit is rebooted

and reenters auto address setting mode.

AConnect 3 wires between indoor and outdoor units properly.

BCheck refrigerant line address, indoor unit address, and group address of each unit.

Regarding twin, triple, and double twin, in particular, check for one refrigerant line address for all

units.

CAn indoor unit number (refrigerant line address/group address), once it is set, is retained in

principle unless it is not used for any other unit.

– 61 –

Indoor Unit Power ON Sequence

• Indoor units that are not supplied with power

are in waiting mode continuously.

Power ON

→System start resets the waiting mode.

• Rebooted if power is supplied halfway

Incorrect

Checking group

configuration

Correct

3 minutes

passed

* Correct group configuration means

ANo duplication of indoor unit address

BNo invalid indoor unit address

CIndividual units and header/follower units

are not mixed

DOnly one individual unit

EOne header and one or more follower units

in a group

System start

Auto address start

(About one minute to end)

O/U model identification (10 seconds) (I/U)

<<Notes on trial operation>>

•

Check for normal connections of power

cable, I/U-O/U serial wiring, and group wiring

Power ON all indoor units within 3 minutes

R/C operation available time (after power on)

1)When address is correct: Approx. 50 seconds

2)When auto address is used: Approx. 4-5 minutes

•

Twin header/follower unit identification (I/U)

Group configuration/flap information (R/C)

R/C operation enabled

(50 seconds after power on)

Between indoor units (30-second cycle) (Header/follower)

Within same piping (30-second cycle) (Twin main/sub)

(Communication starts as soon as above status changes.)

(Repeated)

• The indoor unit powered on after auto address judgment under group control is rebooted (system reset), unless it does not

receive data from the header unit or periodic communication within same piping within 120 seconds after power on.

→The sequence restarts from auto address judgment (checking group configuration).

• If the previous address fixed and the header unit is powered on and is rebooted, the refrigerant line address of indoor units

remains unchanged, but the header unit address may change.

– 62 –

ON-SITE SETTING AND OTHERS (Continued)

3. Connections for Central Control

3.1 Connections for TCC-LINK Central Control

3.1.1 Functions

Connect an indoor unit to the TCC-LINK central controller.

3.1.2 Connection Diagram

Central controller

Indoor unit

CN40

Terminal block

CN41

(U3/U4)

TCC-LINK

Number of units

Communication length : 2km

: 64

Terminal block

(A/B)

Remote controller

3.1.3 TCC-LINK Connections

How to make connections

The terminal block for TCC-LINK central control is located at the lower right of the indoor unit.

For details, see the installation manual of applicable central control remote control system.

When using the terminal block, detach the front panel following the description on how to replace main

components in this manual.

Electric parts box

Terminal block

Cord clamp

Terminal block for central control wiring (lower right part without front panel)

– 63 –

3.1.4 Wiring Specifications

Number of wires

Size

Specification

MVVS

Up to 1000m: 1.25mm2 stranded wires

Up to 2000m: 2.0mm2 stranded wires

• A 2-wire non-polarity cable is used.

• The cable length depends on each central control system.

When used in a system including multiple air conditioners, the length includes the length of all wires

between indoor and outdoor units on the side of multiple air conditioners.

• Use 2-wire shield cable (MVVS) to protect from noise.

• Joint shield wire between indoor units by closed-end terminating, and leave its end open with insulation

processing.

Make one-point grounding at the indoor unit side. Set the terminating resistors.

(Central control for custom indoor units only)

AJoint shield wire between indoor units by closed-end terminating.

BLeave the end of the shield wire open with insulation processing.

CMake one-point grounding at the indoor unit side.

Central controller

U1 U2

Note B

Outdoor

unit

1 2 3

Note A

Header

1 2 3

Follower

1 2 3

Indoor

unit

U3 U4

1 2 3

A B

U3 U4

A B

R/C

(Group operation)

– 64 –

ON-SITE SETTING AND OTHERS (Continued)

3.1.5 Setting Onboard Switches

Setting of terminating resistors is necessary for central control of custom indoor units only.

• Use SW01 to set terminating resistors.

• Set terminating resistors for the indoor unit only with the smallest refrigerant line address.

Central controller Central controller

Central controller: Up to 10 units

U1 U2

U3 U4

U1 U2

U3 U4

Refrigerant system 1

Refrigerant system 2

Refrigerant system 3

Outdoor

unit

1 2 3

Header

Follower

Indoor

unit

U3 U4

1 2 3

A B

U3 U4

1 2 3

A B

TCC-LINK adapter (option)

Required for custom

indoor units other

R/C wiring

than wall type

R/C

Group operation (up to 8 indoor units)

Refrigerant line address

SW01 bit 1

OFF

Remarks

Bit 1 ON

Factory setting

– 65 –

3.1.6 Onboard Switch Setting Procedure

1. Detach the front panel.

2. Remove the drain guide, ground line, sensor TCJ, sensor TC, and motor leads.

3. Remove the screws to detach the electric parts box.

Sensor TCJ insertion position

(Insert the sensor drawn from above electric parts.)

Sensor TC insertion position

(Insert the sensor drawn from under electric parts.)

Fan motor connector insertion position

Louver motor connector insertion position

Electric parts box screw

4. Detach the electric parts cover, and set SW01 bit 1 to ON.

Do not touch bit 2 as it is for other setting.

DB301

C302

L301

1 : OFF

2 : OFF

1 : ON

2 : OFF

T301

CN40

C301

Factory After setting

setting change

CN102

CN213

IC01

BZ01

O N

SW02

MCC-1510

5. Install the removed parts by reversing steps 1 to 4.

(Insert the sensors and motor leads firmly into their correct positions.)

– 66 –

ON-SITE SETTING AND OTHERS

3.1.7 Setting Addresses

Overview

To connect custom air conditioners to the TCC-LINK central control system for central control/monitoring,

addresses of connected indoor units must be set in the following procedure.

Connections/wiring

completed

System power ON

Auto address setting

The system performs automatically after power on.

Manual setting/change of refrigerant

line addresses

Change refrigerant line address.

If auto address setting failed, set refrigerant line address manually.

* Refer to ADDRESS SETTING.

Is group control (including twin/triple/

double twin) going?

YES

Are all indoor units with central control

function header unit (group address=1)?

YES

Re-set indoor units with central control function to header

unit, and other indoor units to follower unit.

* Refer to ADDRESS SETTING.

Central control address number

setting

* Refer to the manual of the central control system.

END

– 67 –

(1) Manual setting/change of indoor unit refrigerant line addresses

[In the case of 29 refrigerant systems or less (when multiple air conditioners are included,

their number of refrigerant systems is also included)]

Refrigerant address “1” is assigned to all indoor units except for group control by the auto address

setting after system power on. Therefore, change refrigerant line address of each refrigerant system

using the wired remote controller.

Central

controller

Refrigerant Refrigerant

Refrigerant

system 3

Refrigerant Refrigerant

system 1

system 2

system 4

system 5

O/U

I/U

R/C

Refrigerant line

address

Indoor unit

address

An example after auto address

setting

Group address

Refrigerant line

address

Indoor unit

address

After changing refrigerant line

address manually

Group address

* For changing/setting refrigerant line addresses by wired remote controller, refer to ADDRESS

SETTING.

* Refrigerant line address must be unique for each refrigerant system.

To perform central control in combination of multiple and custom air conditioners, set refrigerant

line addresses different from those of multiple air conditioners.

– 68 –

ON-SITE SETTING AND OTHERS

(2) Manual setting/change of indoor unit refrigerant line addresses

[In the case of 30 refrigerant systems or more (when multiple air conditioners are included,

their number of refrigerant systems is also included)]

Regarding refrigerant systems up to No. 29, manual setting/change is the same as that on the

previous page.

• Refrigerant address “1” is assigned to all indoor units except for group control by the auto address

setting after system power on. Therefore, change refrigerant line address of each refrigerant

system using the wired remote controller.

• Also change indoor unit addresses so as to avoid duplication of indoor unit numbers.

Central

controller

Refrigerant Refrigerant

system 30 system 31

Refrigerant

system 32

Refrigerant Refrigerant

system 33 system 34

O/U

I/U

R/C

Refrigerant line

address

Indoor unit

address

An example after auto address

setting

Group address

Refrigerant line

address

Indoor unit

address

After changing refrigerant line

address manually

Group address

* For changing/setting refrigerant line addresses by wired remote controller, refer to ADDRESS

SETTING.

* Change refrigerant line address of all indoor units connected directly to the central controller to

“30”.

These indoor units are under twin or triple control, also change the refrigerant line address of

follower indoor units to “30”.

* Change indoor unit addresses so that they are not duplicated.

– 69 –

3.1.8 Central Control Address Number Setting

To connect an indoor unit to the central control remote controller, an address number for central control

must be set.

An address number for central control is indicated as the refrigerant line number of the remote

controller.

1. Setting by Remote Controller on Indoor Unit Side

<Procedure> Perform the following steps in the operation OFF

mode.

(Fig. 1)

Press

and

on the R/C simultaneously for 4 seconds

or more.

When group control is going, UNIT No.

is displayed first,

and all indoor units in the group are selected. At this time, the

fans of all the selected indoor units start running. (Fig. 1)

Maintain this state without pressing

For individual remote controllers without group control, a

refrigerant line address and an indoor unit address are

indicated.

Specify code

with

buttons.

Table 1

Choose setting data with

Table 1 shows setting data.

buttons.

Setting data Address No. for central control

0001

0002

0003

Press

Indication on the LCD shows normal operation.

• To change an item for setting, return to

0064

0099

Not set (factory setting)

Press

to return to the normal indication.

– 70 –

11. ADDRESS SETTING

1. Address Setting

Address Setting Procedure

When twin or triple operation is selected with one indoor unit and one outdoor unit or when one outdoor is

connected to each indoor unit even with multiple refrigerant systems in group operation, auto address

setting is completed during the power on process of outdoor unit.

Remote controller operation is disabled during the auto address setting process (4 to 5 minutes).

O/U refrigerant line address/I/U

address/group address setting

Connections/wiring

completed

Do you set I/U

address freely?

One refrigerant

system?

(manually)

Is group control going?

(To auto address

setting mode)

Multiple units for

twin/triple operation?

Power ON outdoor unit

Auto address setting

first, then corrected?

Auto address setting

ends within 4 to 5

minutes.

Connect com. cable between

R/C and I/U temporarily one

to one.

Power ON outdoor unit.

(Corrected to an address/group

manually after address setting)

Set address for each

I/U individually

END

• Unless the following addresses are stored in the EEPROM (IC10) on the indoor unit board, trial

operation is disabled. (Undefined data is stored at factory shipping.)

Code

Factory setting data

Setting data range

Refrigerant line address

Indoor unit address

0099

0001 (unit No. 1) to 0030 (unit No. 30)

0001 (unit No. 1) to 0064 (unit No. 64)

Maximum I/U address in the same refrigerant system (double twin=4)

Group address

0099

0000 : Individual (indoor units without group control)

0001 : Header (one indoor unit in the group)

0002 : Follower (indoor units in the group except header unit)

– 71 –

2. Address Setting and Group/Twin/Triple Control

Indoor unit No.

Group address

: N-n=O/U refrigerant line address N (30 max.) -I/U address n (64 max.)

: 0=Individual (without group control)

1=Header unit under group control

2=Follower units under group control

Header indoor unit (=1) : A representative unit of multiple indoor units in group operation, which performs

communication between R/C and follower I/U. (* It does not mean an indoor unit

that communicates with O/U.)

Operation mode and setting temperature range (except flap air flow control) of

header unit are reflected on the LCD of remote controller.

Follower indoor unit (=2) : Indoor units except header unit in group operation.

It does not control communication with remote controller in principle (except

response to alarm/service data request).

Main unit

In a minimal configuration of refrigerant cycle such as twin, triple or double twin, an indoor

unit which communicates with O/U among those with same refrigerant line address.

Communicates with sub indoor units and with O/U (instructions to compressor)

on behalf of cycle control.

(Representative)

(Twin header)

Sub indoor unit

(Sub unit)

(Twin follower)

: Indoor units except the main indoor unit in a twin, triple or double twin system.

Communicates with the main indoor unit with the same refrigerant line address,

and provides control in synchronization with the main indoor unit. It does not

communicate with O/U (no detection of serial signal alarm).

[1] System Configuration

a)Single

b)Twin

Outdoor unit

1:1

individual

1-2

H/M

1-1

F/S

1-4

F/S

1-3

F/S

Indoor unit

(H/M)

R/C

c) Single group operation

2-1

F/M

1-1

F/M

4-1

H/M

3-1

F/M

8-1

F/M

• Each indoor unit controls outdoor unit individually.

d)Multiple single/twin/triple group operation (manual address setting)

H : Header indoor unit

F : Follower indoor unit

M: Main indoor unit

S : Sub indoor unit

2-1

F/M

1-1

F/M

1-2

F/S

1-3

F/S

3-3

H/M

3-4

F/S

3-2

F/S

3-1

F/S

• Main indoor unit : Receives data (thermo status, etc.) from sub indoor units with same refrigerant line

address, and controls O/U compressor referring to the self thermo status. Transmits

this instruction to sub units.

• Sub indoor unit : Receives data from the main indoor unit with same refrigerant line address and serial

interface with O/U, and performs thermo operation in synchronization with the main

unit. Sends self thermo ON/OFF request to the main unit.

(Example) 1-1 main unit communicates with 1-2 and 1-3 sub units without being

affected by indoor units with refrigerant line address 2 or 3.

– 72 –

[2] Examples of Auto Address Setting from No Address Setting

1) Standard (one outdoor unit)

a) Single

b) Twin

(1-1)

(1-2)

1-1

individual

1-2

H/M

1-1

F/S

(H/M)

*** Turn ON the power. Address setting is completed automatically. ***

2) Group operation (multiple O/U = multiple indoor units with serial communication interface, no twin)

2-1

1-1

3-1

8-1

F/M

H/M

F/M

8 indoor units maximum

*** Turn ON the power. Address setting is completed automatically. ***

3) Multiple group operation

A (single)

B (triple)

C (double)

2-1

F/M

1-1

F/M

2-1

F/S

3-3

H/S

3-1

F/M

2-2

F/S

1-2

F/S

3-2

F/S

*** Address change required ***

Change sub unit addresses at the same time manually

from remote controller.

2-1

1-1

1-2

1-3

3-1

3-2

3-3

3-4

H : Header indoor unit

F : Follower indoor unit

M: Main indoor unit

S : Sub indoor unit

– 73 –

3. Address Setting

When determining indoor unit addresses with wiring completed without piping

construction

(Manual setting by remote controller)

Connect a remote controller to the

indoor unit whose address you want to

set one to one.

Turn ON the power.

Press

, and

on the R/C

simultaneously for 4 seconds or more.

Wiring example of 2 refrigerant systems

(Solid line: wiring, broken line: refrigerant piping)

→

Refrigerant

line address

Set code

with

buttons.

O/U

Set a refrigerant line address with

buttons.

(Power cable only)

Press

normal operation.

Indication on the LCD shows

I/U

Refrigerant line

address → 1

Indoor unit address → 1

→

Indoor unit

address

Set code

with

buttons.

Group address → 1

For systems like this example, connect a wired remote controller

independently without connecting R/C wires, and then set these addresses.

Set indoor unit addresses with

buttons.

Group address

Individual: 0000

Header unit: 0001

in case of group control

Follower unit: 0002

Press

Indication on the LCD shows

normal operation.

→

Group

Set code

with

buttons.

address

Set indoor unit addresses with

buttons as follows:

Individual=

, header unit=

follower unit=

Press

normal operation.

Indication on the LCD shows

End

Press

Operation procedure

Indoor unit address setting is completed.

The operation mode returns to normal

OFF.

End

– 74 –

ADDRESS SETTING (Continued)

■Checking location of indoor unit number

(1) To find the address of indoor unit whose location is clear

In case of independent operation (1:1 connection of wired R/C

and I/U)

Perform the procedure during operation of indoor unit.

When the indoor unit is not working, press

the R/C.

Press

UNIT No.

seconds.

appears on the LCD and disappears in several

The displayed number shows the refrigerant line address and

indoor unit address.

When other indoor units are connected to the same remote

controller (group control), their unit numbers are displayed in

Operation procedure

order each time

is pressed.

(2) To find the location of indoor unit from its address

When checking indoor unit number in the group.

Perform the procedure while the indoor unit is not working.

This procedure stops operation of all indoor units in the group.

Indoor unit numbers appear one by one and the fan and flap of

the displayed unit run.

Press

or more.

• UNIT No.

and

on the R/C simultaneously for 4 seconds

appears.

• The fan and flap of all indoor units in the group run.

Each pressing of

the group sequentially.

• The header unit address appears first.

• The fan and flap of a selected indoor unit run.

on the R/C displays unit numbers in

End

Operation procedure

End

Press

to finish the procedure. Operation of all the indoor

units in the group turns OFF.

– 75 –

12. EXPLODED VIEWS AND PARTS LIST

High-Wall Type

RAV-SM562KRT-E/RAV-SM802KRT-E

219

221

220

215

213

214

232

229

228

222

218

230

216

211

208

217

227

201

209

203

231

224

226

202

212

223

210

207

234

235

236

204

233

Location

No.

Part

No.

Location

No.

Part

No.

Description

201

202

203

204

207

208

209

210

211

212

213

43T00409 FRONT PANEL ASSY

43T09375 GRILLE ASSY

43T80306 AIR FILTER (L)

43T80312 AIR FILTER (R)

43T03010 BODY; RIGHT

43T03011 BODY; LEFT

43T03012 HIDE; CLAW

43T09345 LOUVER-H

43T70001 HOSE ASSY; DRAIN

43T21367 MOTOR;STEPPING

43T44373 REFRIGERATION ASSEMBLY

(FOR RAV-SM562KRT-E)

43T44374 REFRIGERATION ASSEMBLY

(FOR RAV-SM802KRT-E)

217

218

219

220

221

222

223

224

226

227

228

229

230

231

232

234

235

236

43T19322 FIX-P-SENSOR

43T49323 SPRING

43T49324 PLATE; EVA-SEAL

43T49039 HOLDER; PLATE EVA-SEAL

43T49038 PLATE; EVA-SEAL

43T49037 HOLDER; PLATE EVA-SEAL

43T79007 GUIDE DRAIN

43T39016 FIX FOR MOTOR

43T21368 MOTOR FAN

43T20315 FAN; CROSS FLOW

43T22307 M-B-BEARING

43T39015 BASE; BEARING

43T03336 BACK BODY ASSY

43T07022 HOLDER; PIPE

43T82306 PLATE; INSTALLATION

43T69495 WIRELESS REMOCON

213

216

43T49021 PIPE; SHIELD

43T83003 HOLDER; REMOTE CONTROLLER

43T62029 COVER; TERMINAL

– 76 –

RAV-SM562KRT-E/RAV-SM802KRT-E

Location

No.

Part

No.

Location

No.

Part

No.

Description

401

402

403

404

405

406

43T60047 TERMINAL

43160508 TERMINAL

43T60321 TERMINAL

43T50308 SENSOR HEAT EXCHANGER

43T50306 TEMPERATURE SENSOR

43T69320 TEMPERATURE SENSOR

407

408

409

410

411

43T60361 FUSE

43T09343 E-PARTS BASE

43T69536 PC BOARD

43T69500 DISPLAY UNIT

43T09344 CORD CLAMP

– 77 –

T O S H IB A C A R R IE R ( T H A IL A N D ) C O . , LT D .

144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI,

AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

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