Toshiba RAS-09LAV-UL, RAS-09LKV-UL, RAS-12LAV-UL, RAS-12LKV-UL User Manual

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SERVICE MANUAL

Indoor Unit Outdoor Unit

FILE NO. SVM-10019

SPLIT TYPE

RAS-09LKV-UL RAS-09LAV-UL RAS-12LKV-UL RAS-12LAV-UL

R410A

Feburary, 2010

FILE NO. SVM-10019

CONTENTS

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

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

3. REFRIGERANT R410A ............................................................................. 8

4. CONSTRUCTION VIEWS ........................................................................ 16

5. WIRING DIAGRAM .................................................................................. 18

6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 20

7. REFRIGERANT CYCLE DIAGRAM ........................................................ 21

8. CONTROL BLOCK DIAGRAM ................................................................ 24

9. OPERATION DESCRIPTION................................................................... 26

10. INSTALLATION PROCEDURE ................................................................ 51

11. HOW TO DIAGNOSE THE TROUBLE...................................................... 66

12. HOW TO REPLACE THE MAIN PARTS................................................... 93

13. EXPLODED VIEWS AND PARTS LIST ................................................. 109

– 2 –

FILE NO. SVM-10019

1. SAFETY PRECAUTIONS

Installing, staring up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install, start-up, and service this equipment. Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should be

performed by trained service personnel.

When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment.

Follow all safety codes, Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher near by when brazing. Use care in handling, rigging, and setting bulky equipment.

Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety information. This is the safety-alert symbol

potential for personal injury. Understand these signal words : DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol.

DANGER identifies the most serious hazards which will result in severs personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

! . When you see this symbol on

the unit and in instructions or manuals, be alert to the

• Before installation, please read these precautions for safety carefully.

• Be sure to follow the precautions provided here to avoid safety risks. The symbols and their meanings are shown below.

WARNING : It indicates that incorrect use of this unit may cause severe injury or death. CAUTION : FAILURE TO FOLLOW THIS CAUTION may result in equipment damage or improper operation and

personal injury.

CAUTION

New refrigerant air conditioner installation

• THIS AIR CONDITIONER USES THE NEW HFC REFRIGERANT (R410A), WHICH DOES NOT DESTROY THE

OZONE LAYER. R410A refrigerant is affected by inpurities such as water and oils because the pressure of R410A refrigerant is approx.

1.6 times of refrigerant R22. ALSO NEW OILS ARE USED WITH R410A, THUS ALWAYS USE NEW REFRIGERANT PIPING AND DO NOT ALLOW MOISTURE OR DUST TO ENTER THE SYSTEM. To avoid mixing refrigerant and refrigerant machine oil, the sizes of charging port on the main unit is different than those used on R22 machines and different tools will be required.

• EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation. Do not bury more than 36 in. (914 mm) of refrigerant pipe in the ground. If any section of pipe is buried, there must be a 6 in. (152 mm) vertical rise to the valve connections on the outdoor units. If more than the recommended length is buried, refrigerant may migrate to the cooter buried section during extended periods of system shutdown. This causes refrigerant slugging and could possibly damage the compressor at start-up.

− 3 −

FILE NO. SVM-10019

DANGER

• FOR USE BY QUALIFIED PERSONS ONLY.

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

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

• CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED WRONGLY,

ELECTRIC PARTS MAY BE DAMAGED.

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

• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS.

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

• TO PREVENT OVERHEATION THE INDOOR UNIT AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL AWAY

(MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEATERS, FURNACE, STOVES, ETC.

• WHEN MOVING THE AIR CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY CAREFUL NOT

TO GET THE SPECIFIED REFRIGERANT (R410A) WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION CYCLE. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CYCLE BECOMES ABNORMALLY HIGH AND IT RESULTINGLY CAUSES BURST OF THE PIPE AND INJURIES ON PERSONS.

• IN THE EVENT THAT THE REFRIGERANT LEAK, DURING INSTALLATION WORK, IMMEDIATELY ALLOW FRESH AIR

INTO THE ROOM. IF THE REFRIGERANT GAS IS HEATED BY FIRE OR SOMETHING ELSE, IT CAUSE GENERATION OF POISONOUS GAS.

WARNING

• ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death. Before installing, modifying, or servicing system, main electrical disconnect switch must be in the OFF position. There may be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label.

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

• Installation work must be purformed by qualified personnel only.

• Specified tools and pipe parts for model R410A are required, and installation work must be done in accordance with the

manual. HFC type refrigerant R410A has 1.6 times more pressure than that of conventional refrigerant (R22). Use the specified pipe parts, and ensure correct installation, otherwise damage and/or injury may be caused. At the same time, water leakage, electrical shock, and fire may occur.

• Be sure to install the unit in a place which can sufficiently bear its weight. If the load bearing of the unit is not enough, or

installation of the unit is improper, the unit may fall and result in injury.

• Electrical work must be performed by trained, qualified installers and service mechanics in accordance with the code governing

such installation work, internal wiring regulations, and the manual. A dedicated circuit and the rated voltage must be used. Insufficient power supply or improper installation may cause electrical shock or fire.

• Use a cabtyre cable to connect wires in the indoor/outdoor units. Midway connection is not allowed. Improper connection or

fixing may cause a fire.

• Wiring between the indoor unit and outdoor units must be well shaped so that the cover can be firmly placed. Improper

cover installation may cause increased heat, fire, or electrical shock at the terminal area.

• Be sure to use only approved accessories or the specified parts. Failure to do so may cause the unit to fall, water leakage,

fire or electrical shock.

• After the installation work. ensure that there is no leakage of refrigerant gas. If the refrigerant gas leaks out of the pipe into

the room and is heated by fire or something else from a fanheater, stove or gas range, it causes generation of poisonous gas.

• Make sure the equipment is properly grounded. Do not connect the ground wire to a gas pipe, water pipe, lightning

conductor, or telephone earth wire. Improper earth work may be the cause of electrical shock.

• Do not install the unit where flammable gas may leak. If there is any gas leakage or accumulation around the unit, it can

cause a fire.

• Do not select a location for installation where there may be excessive water or humidity, such as a bathroom. Deterioration

of insulation nay cause electrical shock or fire.

• Installation work must be performed following the instructions in this installation manual. Improper installation may cause

water leakage, electrical shock or fire. Check the following items before operating the unit.

- Be sure that the pipe connection is well placed and there are no leaks.

- Check that the service valve is open. If the service valve is closed, it may cause overpressure and result in compressor damage. At the same time, if there is a leak in the connection part, it may cause air suction and overpressure, resulting in damage to the unit or injury.

• In a pump-down operation, be sure to stop the compressor unit before removing the refrigerant pipe. If removing the

refrigerant pipe while the compressor is operating with the service valve opened, it may cause air suction and overpressure, resulting in damage to the unit or injury.

• Do not modity the power cable, connect the cable midway, or use a multiple outlet extension cable. Doing so may cause

contact failure, insulation failure, or excess current, resulting in fire or electrical shock.

• If you detect any damage, do not install the unit. Contact your dealer immediately.

− 4 −

FILE NO. SVM-10019

CAUTION

• Exposure of unit to water or other moisture before installation could result in electric shock. Do not store it in a wet

basement or expose to rain or water.

• After unpacking the unit, examine it carefully for possible damage. Report any damages to your distributor.

• Do not install in a place that can increase the vibration of the unit. Do not install in a place that can amplify

the noise level of the unit or where noise and discharged air might disturb neighbors.

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

for proper installation.

• This appliance must be connected to the main power supply by means of a circuit breaker depending on the

place where the unit is installed. Failure to do so may cause electrical shock.

• Follow the instructions in this installation manual to arrange the drain pipe for proper drainage from the unit.

Ensure that drained water is discharged. Improper drainage can result is water leakage, causing water damage to furniture.

• Tighten the flare nut with a torque wrench using the prescribed method. Do not apply excess torque. Otherwise,

the nut may crack after a long period of usage and it may cause the leakage of refrigerant.

• Wear gloves (heavy gloves such as cotton gloves) for installation work. Failure to do so may cause personal

injury when handling parts with sharp edges.

• Do not touch the air intake section or the aluminum fins of the outdoor unit. It may cause injury.

• Do not install the outdoor unit in a place which can be a nest for small animals. Small animals could enter and

contact internal electrical parts, causing a failure or fire.

• Request the user to keep the place around the unit tidy and clean.

• Make sure to conduct a trial operation after the installation work, and explain how to use and maintain the unit

to the customer in accordance with the manual. Ask the customer to keep the operation manual along with the installation manual.

− 5 −

2. SPECIFICATIONS

FILE NO. SVM-10019

Unit model Indoor

Outdoor Cooling capacity (Btu/h) 9000 12000 Cooling capacity range (Btu/h) 3750 -10580 2750 - 13950 Heating capacity (Btu/h) 10800 14200 Heating capacity range (Btu/h) 3070 - 16350 3070 - 19000 Power supply Electric Indoor Operation mode characteristic Running current (A) 0.22 0.20 0.25 0.23

Power consumption (W) 35 40 30 35 Power factor (%) 76 76 66 66

Outdoor Operation mode

Running current (A) 3.46 3.13 5.26 4.76 Power consumption (W) 655 760 920 1055 Power factor (%) 91 94 95 95

Starting current (A) 3.68 3.33 4.81/4.35 5.51/4.99 EER (Cooling/Heating) (Btu/W.h) 13.0/13.5 12.6 / 13.0 SEER (Btu/W.h) / HSPF (w/w) Operating Indoor High (Cooling/Heating) (dB-A) 39/40 45/46 noise Medium (Cooling/Heating) (dB-A) 34/35 40/41

Low (Cooling/Heating) (dB-A) 27/29 30/32

Outdoor (Cooling/Heating) (dB-A) 47/47 50/50

Indoor unit Unit model

Dimension Height in. (mm) 10-25/32 (275) 10-25/32 (275)

Width in. (mm) 31-1/8 (790) 31-1/8 (790)

Depth in. (mm) 8-1/16 (205) 8-1/16 (205)

Net weight lbs (kg) 20 (9) 20 (9) Fan motor output (W) 20 30 Air flow rate (Cooling/Heating)

Outdoor unit Unit model

Dimension Height in. (mm) 21-11/16 (550) 21-11/16 (550)

Width in. (mm) 30-11/16 (780) 30-11/16 (780)

Depth in. (mm) 11-7/16 (290) 11-7/16 (290)

Net weight lbs (kg) 75 (34) 88 (39) Compressor Motor output (w) 750 750

Type

Model DA89X1C-23FZ2 DA111A1F-20F1

Fan motor output (W) 43 43

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

Gas side in. (mm)

Outdoor unit Liquid side in. (mm)

Gas side in. (mm) Maximum length ft. (m) Maximum chargeless length ft. (m) 50 (15) 50 (15) Maximum height difference ft. (m) 33 (10) 33 (10)

Refrigerant Name of refrigerant R410A R410A

Weight lbs (kg) 1.77 (0.8) 2.43 (1.10)

Wiring Power supply connection Interconnection 4Wires:includes earth 4Wires:includes earth Usable temperature range Indoor (Cooling/Heating) °F (°C) 70-90 / 32-82 (21-32/0-28) 70-90 / 32-82 (21-32/0-28)

Outdoor (Cooling/Heating) °F (°C) 14-115 / 5-75 (-10-46/-15-24) 14-115 / 5-75 (-10-46/-15-24)

cfm (m

/min)

RAS-09LKV-UL RAS-12LKV-UL RAS-09LAV-UL RAS-12LAV-UL

1Ph, 60Hz, 208V/230V 1Ph, 60Hz, 208V/230V

Cooling Heating Cooling Heating

20.0/10.0

RAS-09LKV-UL RAS-12LKV-UL

303/335 (8.6)/(9.5) 406/438 (11.5/12.4)

RAS-09LAV-UL RAS-12LAV-UL

Single rotary type with DC-inverter

variable speed control

1060/1060 (30)/(30) 1395/1236 (39.5/35.0)

∅1/4 (∅6.35) ∅1/4 (∅6.35) ∅3/8 (∅9.92) ∅3/8 (∅9.92) ∅1/4 (∅6.35) ∅1/4 (∅6.35) ∅3/8 (∅9.92) ∅3/8 (∅9.92)

66 (20)

3Wires:includes earth (Outdoor) 3Wires:includes earth (Outdoor)

Twin rotary type with DC-inverter

23.0/9.5

variable speed control

66 (20)

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

− 6 −

2-2. Operation Characteristic Curve

FILE NO. SVM-10019

RAS-12LKV-UL

RAS-09LKV-UL

Current (A)

Conditions

Indoor : DB 80oF/WB 67oF

(DB 26.7oC/WB 19.4oC)

Outdoor : DB 98oF/WB 75oF

(DB 35oC/WB 23.9oC) Indoor Air Flow : High Pip Length : 5m Voltage : 230V

0 102030405060708090100110120

Compressor Speed (rps)

RAS-12LKV-UL

RAS-09LKV-UL

Current (A)

Conditions

Indoor : DB 70oF/WB 60oF

(DB 21.1oC/WB 15.6oC)

Outdoor : DB 47

(DB 8.3oC/WB 6.1oC) Indoor Air Flow : High Pip Length : 5m Voltage : 230V

F/WB 43oF

0 102030405060708090100110120

Compressor Speed (rps)

2-3. Capacity Variation Ratio According to Temperature

105

100

Capacity Ratio (%)

RAS-09LKV-UL RAS-12LKV-UL

Condition Indoor: DB80°F/WB67°F

(DB26.7°C/WB19.4°C) Indoor Air-Flow Volume: High Pipe Length: 16 ft (5m) Voltage : 230V

Capacity Ratio: 100% = 9000 Btu/h (RAS-09LKV-UL) 12000 Btu/h (RAS-12LKV-UL)

120

100

Capacity Ratio (%)

RAS-09LKV-UL RAS-12LKV-UL

Condition Indoor: DB70°F/WB60°F

(DB21.1°C/WB15.6°C) Indoor Air-Flow Volume: High Pipe Length: 16 ft (5m) Voltage : 230V

Capacity Ratio: 100% = 9000 Btu/h (RAS-09LKV-UL) 12000 Btu/h (RAS-12LKV-UL)

90 91 93 95 97 99 100 102 104 106 108 109 111 113 115

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

5 14 23 32 41 50

(-15) (-10) (-5) (0) (5) (10)

Outdoor Temperature (ºC)

– 7 –

Outdoor Temperature (ºC)

3. REFRIGERANT R410A

FILE NO. SVM-10019

This air conditioner adopts the new refrigerant HFC (R410A) which does not damage the ozone layer.

The working pressure of the new refrigerant R410A is 1.6 times higher than conventional refrigerant (R22). The refrigerating oil is also changed in accordance with change of refrigerant, so be careful that water, dust, and existing refrigerant or refrigerating oil are not entered in the refrigerant cycle of the air conditioner using the new refrigerant during installation work or servicing time.

The next section describes the precautions for air conditioner using the new refrigerant. Conforming to contents of the next section together with the general cautions included in this manual, perform the correct and safe work.

3-1. Safety During Installation/Servicing

As R410A’s pressure is about 1.6 times higher than that of R22, improper installation/servicing may cause a serious trouble. By using tools and materials exclusive for R410A, it is necessary to carry out installation/servicing safely while taking the following precautions into consideration.

1. Never use refrigerant other than R410A in an air conditioner which is designed to operate with R410A.

If other refrigerant than R410A is mixed, pressure in the refrigeration cycle becomes abnormally high, and it may cause personal injury, etc. by a rupture.

2. Confirm the used refrigerant name, and use tools and materials exclusive for the refrigerant R410A.

The refrigerant name R410A is indicated on the visible place of the outdoor unit of the air conditioner using R410A as refrigerant. To prevent mischarging, the diameter of the service port differs from that of R22.

3. If a refrigeration gas leakage occurs during installation/servicing, be sure to ventilate fully.

If the refrigerant gas comes into contact with fire, a poisonous gas may occur.

4. When installing or removing an air conditioner, do not allow air or moisture to remain in the refrigeration cycle. Otherwise, pressure in the refrigeration cycle may become abnormally high so that a rupture or personal injury may be caused.

5. After completion of installation work, check to make sure that there is no refrigeration gas leakage.

If the refrigerant gas leaks into the room, coming into contact with fire in the fan-driven heater, space heater, etc., a poisonous gas may occur.

6. When an air conditioning system charged with a large volume of refrigerant is installed in a small room, it is necessary to exercise care so that, even when refrigerant leaks, its concentration does not exceed the marginal level.

If the refrigerant gas leakage occurs and its concentration exceeds the marginal level, an oxygen starvation accident may result.

7. Be sure to carry out installation or removal according to the installation manual.

Improper installation may cause refrigeration trouble, water leakage, electric shock, fire, etc.

8. Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a qualified air conditioner technician or electrician.

Improper repair’s may result in water leakage, electric shock and fire, etc.

3-2. Refrigerant Piping Installation

3-2-1. Piping Materials and Joints Used

For the refrigerant piping installation, copper pipes and joints are mainly used. Copper pipes and joints suitable for the refrigerant must be chosen and installed. Furthermore, it is necessary to use clean copper pipes and joints whose interior surfaces are less affected by contaminants.

1. Copper Pipes

It is necessary to use seamless copper pipes which are made of either copper or copper alloy and it is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface).

Otherwise, the expansion valve or capillary tube may become blocked with contaminants.

As an air conditioner using R410A incurs pressure higher than when using R22, it is necessary to choose adequate materials.

Thicknesses of copper pipes used with R410A are as shown in Table 3-2-1. Never use copper pipes thinner than 0.0315 in. (0.8 mm) even when it is available on the market.

– 8 –

Table 3-2-1 Thicknesses of annealed copper pipes

Thickness in. (mm)

FILE NO. SVM-10019

Nominal diameter (in.)

1/4 3/8 1/2

Outer diameter (mm)

6.35

9.52

12.70

R410A R22

0.0315 (0.80) 0.0315 (0.80)

0.0315 (0.80)

2. Joints

For copper pipes, flare joints or socket joints are used. Prior to use, be sure to remove all contaminants. a) Flare Joints

Flare joints used to connect the copper pipes cannot be used for pipings whose outer diameter exceeds 20 mm. In such a case, socket joints can be used.

Sizes of flare pipe ends, flare joint ends and flare nuts are as shown in Tables 3-2-3 to 3-2-6 below.

b) Socket Joints

Socket joints are such that they are brazed for connections, and used mainly for thick pipings whose diameter is larger than 0.7874 in. (20 mm).

Thicknesses of socket joints are as shown in Table 3-2-2.

Table 3-2-2 Minimum thicknesses of socket joints

Nominal diameter (in)

1/4 3/8 1/2

Reference outer diameter of

copper pipe jointed (mm)

6.35

9.52

12.70

Minimum joint thickness

in. (mm)

0.0197 (0.50)

0.0236 (0.60)

0.0276 (0.70)

3-2-2. Processing of Piping Materials

When performing the refrigerant piping installation, care should be taken to ensure that water or dust does not enter the pipe interior, that no other oil than lubricating oils used in the installed air-water heat pump is used, and that refrigerant does not leak. When using lubricating oils in the piping processing, use such lubricating oils whose water content has been removed. When stored, be sure to seal the container with an airtight cap or any other cover.

1. Flare processing procedures and precautions

a) Cutting the Pipe

By means of a pipe cutter, slo wly cut the pipe so that it is not deformed.

b) Removing Burrs and Chips

If the flared section has chips or burrs, refrigerant leakage may occur. Carefully remove all burrs and clean the cut surface before installation.

c) Insertion of Flare Nut

– 9 –

d) Flare Processing

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

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

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

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

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

Nominal diameter

in.

Outer

diameter

(mm)

Thickness

in. (mm)

Fig. 3-2-1 Flare pr ocessing dimensions

Flare tool for R410A

clutch type

FILE NO. SVM-10019

ØD

A in. (mm)

Conventional flare tool

Clutch type Wing nut type

1/4

3/8

1/2

Nominal

diameter

in.

1/4

3/8

1/2

6.35

9.52

12.70

Table 3-2-4 Dimensions related to flare processingf or R22

Outer

diameter

(mm)

6.35

9.52

12.70

0.0315 (0.8)

Thickness

in. (mm)

0.0315 (0.8)

Table 3-2-5 Flare and flare nut dimensions for R410A

0 to 0.0197 (0 to 0.5)

Flare tool for R22

clutch type

0 to 0.0197 (0 to 0.5)

0.0394 to 0.0591

0.0197 to 0.0394

0.0591 to 0.0787

(1.0 to 1.5)

A in. (mm)

Conventional flare tool

Clutch type Wing nut type

(0.5 to 1.0)

(1.5 to 2.0)

0.0591 to 0.0787 (1.5 to 2.0)

0.07874 to 0.0984 (2

.0 to 2.5)

0.0394 to 0.0591 (1.0 to 1.5)

0.0591 to 0.0787

(1.5 to 2.0)

Nominal

diameter

in.

1/4 3/8 1/2

Outer diameter

(mm)

6.35

9.52

12.70

Thickness

in. (mm)

0.0315 (0.8)

Dimension in. (mm)

A B C D

0.358 (9.1)

0.520 (13.2) 0.531 (13.5) 0.382 (9.7) 0.787 (20)

0.630 (16.0)

0.362 (9.2) 0.256 (6.5)

0.653 (16.6)

0.508 (12.9)

0.512 (13)

0.906 (23)

– 10 –

Flare nut width

in. (mm)

0.669 (17)

0.866 (22)

1.024 (26)

Table 3-2-6 Flare and flare nut dimensions for R22

FILE NO. SVM-10019

Nominal

diameter

in.

1/4 3/8 1/2

Outer diameter

(mm)

6.35

9.52

12.70

Thickness

in. (mm)

0.0315 (0.8)

45 to 46

Dimension in. (mm)

A B C D

0.354 (9.0)

0.362 (9.2) 0.256 (6.5)

0.512 (13)

0.512 (13.0) 0.531 (13.5) 0.382 (9.7) 0.787 (20)

0.630 (16.0)

B A

0.638 (16.2)

43 to 45

0.508 (12.9)

0.787 (20)

Flare nut width

in. (mm)

0.669 (17)

0.866 (22)

0.945 (24)

Fig. 3-2-2 Relations between flare nut and flare seal surface

2. Flare Connecting Procedures and Precautions

a) Make sure that the flare and union portions do not have any scar or dust, etc.

b) Correctly align the processed flare surface with the union axis. c) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R410A is

the same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur.

When it is strong, the flare nut may crack and may be made non-removable. When choosing the tightening torque, comply with values designated by manufacturers. Table 3-2-7 shows reference values.

NOTE :

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

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

Nominal

diameter

in.

Outer diameter

(mm)

Tightening torque

lbf.ft (N•m)

Tightening torque of torque

wrenches available on the market

lbf.ft (N•m)

1/4

3/8

1/2

6.35

9.52

12.70

10 to 13 (14 to 18)

24 to 31 (33 to 42)

37 to 46 (50 to 62)

– 11 –

12 (16), 13 (18)

31 (42)

41 (55)

FILE NO. SVM-10019

3-3. Tools

3-3-1. Required T ools

The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is changed to prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing

dimensions and opposite side dimension of flare nut (For ∅ 1/2 in. 12.7mm) 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

air-water heat pump installation

No.

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

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

Used tool

Flare tool

Copper pipe gauge for adjusting projection margin

Torque wrench [(For Ø1/2 (12.7mm)]

Gauge manifold

Charge hose

Vacuum pump adapter

Electronic balance for refrigerant charging

Refrigerant cylinder

Leakage detector

Charging cylinder

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

Pipe flaring

Flaring by conventional flare tool

Connection of flare nut

Evacuating, refrigerant charge, run check, etc.

Vacuum evacuating

Refrigerant charge

Gas leakage check

Refrigerant charge

Usage

Existence of new equipment for R410A

Ye s

(Note 2)

R410A

Whether conventional equipment can be used

*(Note 1)

× × ×

× ×

Conventional air-water heat pump installation

Whether new equipment can be used with conventional refrigerant

*(Note 1)

General tools (Conventional tools can be used.)

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

1. Vacuum pump Use vacuum pump by attaching vacuum pump adapter.

2. Torque wrench [For Ø1/4, Ø3/8 in.

(∅ 6.35, ∅ 9.52mm)]

3. Pipe cutter

4. Reamer

5. Pipe bender

9. Hole core drill [Ø2-9/16 in. (65mm)]

10. Hexagon wrench

6. Level vial

7. Screwdriver (+, –)

11. Tape measure

8. Spanner or Monkey wrench

[Opposite side 3/16 in. (4mm)]

12. Metal saw

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

1. Clamp meter

2. Thermometer

3. Insulation resistance tester

4. Electroscope

– 12 –

FILE NO. SVM-10019

3-4. Recharging of Refrigerant

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

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

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

Connect the charge hose to the vacuum pump adapter.

Open fully both packed valves at liquid and gas sides.

When the compound gauge’s pointer has indicated

−

14.7 Psi (–0.1 Mpa) or − 29.9 inHg (–76 cmHg), place the handle Low in the fully closed position, and turn off the vacuum pump's power switch.

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

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

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

(For refrigerant charging, see the figure below.)

1. Never charge refrigerant exceeding the specified amount.

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

3. Do not carry out additional charging.

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

(Indoor Unit)

Opened

(Outdoor unit)

Refrigerant cylinder

(with siphon)

Check valve

Opened Open/close valve for charging

Electronic balance for refrigerant charging

Fig. 3-4-1 Configuration of refrigerant charging

Opened

Closed

Service port

– 13 –

FILE NO. SVM-10019

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

2. When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.

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

[ Cylinder with siphon ] [ Cylinder without siphon ]

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Gauge manifold

OUTDOOR unit

cylinder

Refrigerant

Electronic

balance

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

3-5. Brazing of Pipes

3-5-1. Materials for Brazing

1. Silver brazing filler

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

2. Phosphor bronze brazing filler

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

Electronic

balance

Siphon

Fig. 3-4-2

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

2. When performing brazing again at time of servicing, use the same type of brazing filler.

3-5-2. Flux

3. Low temperature brazing filler

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

1. Reason why flux is necessary

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

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

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

– 14 –

2. Characteristics required for flux

• Activated temperature of flux coincides with the brazing temperature.

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

• It is easy to remove slag after brazing.

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

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

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

3. Types of flux

• Noncorrosive flux

Generally, it is a compound of borax and boric acid. It is effective in case where the brazing temperature is higher than 1472°F (800°C).

• Activated flux

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

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

FILE NO. SVM-10019

3-5-3. Brazing

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

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

Never use gas other than Nitrogen gas.

1. Brazing method to prevent oxidation

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

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

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

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

5) Adjust the flow rate of Nitrogen gas so that it is lower than 0.03 cfm (0.05 m (0.02 MPa) by means of the reducing valve.

6) After performing the steps above, keep the Nitrogen gas flowing until the pipe cools down to a certain extent (temperature at which pipes are touchable with hands).

7) Remove the flux completely after brazing.

/Hr) or 2.9 Psi

Piping material

Copper - Copper

Copper - Iron

Iron - Iron

Used brazing filler

Phosphor copper

Silver

Used flux

Do not use

Paste flux

Vapor flux

1. Do not enter flux into the refrigeration cycle.

2. When chlorine contained in the flux remains within the pipe, the lubricating oil deteriorates. Therefore, use a flux which does not contain chlorine.

3. When adding water to the flux, use water which does not contain chlorine (e.g. distilled water or ion-exchange water).

4. Remove the flux after brazing.

Flow meter

Stop valve

Nitrogen gas

cylinder

From Nitrogen cylinder

Pipe

Nitrogen gas

Rubber plug

Fig. 3-5-1 Prevention of oxidation during brazing

– 15 –

4-1. Indoor Unit

4. CONSTRUCTION VIEWS

FILE NO. SVM-10019

– 16 –

4-2. Outdoor Unit

1 (25) Water Drain Outlet

1-31/32 (50) 1-27/64 (36)

12-3/64 (306)

12-19/32 (320)

Detail-A (Rear Leg)

23-5/8 (600)

R19/32

(R15)

R7/32

5.5

1/4 Hole

(

) Hole

)

) 86

12-19/32 (320)

3-3/8 (

4-1/4 (

108

FILE NO. SVM-10019

Unit : Inch (mm)

)

4-15/16 (

125

)

12-3/64 (306)

12-19/32 (320)

1/4-Hole

(

)-Hole

)

1-27/64 (36)

116

1-31/32 (50)

4-9/16 (

23-5/8 (600)

Detail-B (Front Leg)

R19/32 (R15)

7/16x9/16 Oval-Hole

(

11x14) Oval Hole

11-7/16 (

290

17-5/32 (

) 550

436

)

WIRE GUARD

COVER PACKED VALVE

View Z

21-11/16 (

10-7/8 (275)

)

3-17/32 (90)

23-5/8 (

600

)

3-17/32 (90)

2-23/32 (69)

)

141

2-3/32 (

5-9/16 (

13-1/2 (342)

Liquid side (Flare Nut :

Gas side (Model 09,12k Flare Nut :

1/4 (

6.35)) 3/8 (

9.52))

3-15/16 Or more

(100 mm or more)

12-19/32 (320)

View Z

23-5/8 (

Air Inlet

Air Outlet

600

)

3-15/16 Inch or more (100 mm. or more)

23-5/8 Inch or more (600 mm. or more)

– 17 –

) 88

Service Port

3-15/32 (

2-R7/32x43/64L (R5.5x17L) U-Shape (For

5/16~

23-5/8 Or more

(600 mm or more)

7/16x9/16 (

2 (For

5/16~

13/32 (8~10) Anchor Bolt)

13/32 (

11x14) Oval-Hole

10) Anchor Bolt)

5. WIRING DIAGRAM

AC Motor

5-1. RAS-09LKV-UL / RAS-09LAV-UL

FILE NO. SVM-10019

COMPRESSOR

1 1 2 2

3 3

YEL

BRW

YEL

ORN

1 2 1

REACTOR

RED WHI BLK

P25

P23

P21

P35

P34

P19

P18 P11

P08

P04 P05 P06

P24

P22

P20

DB01

Q404

Q200~205 IGBT

POWER RELAY

DB02

P33 P31 P30

R221

R220

R219

RELAY

PUR

L03

C13

C12 C14

P.C.BOARD (MCC-5009)

REACTOR

Outdoor Terminal Block

1 2 1 2

F03

FUSE

T3.15A

AC250V

CN701 P32

1 3 1

R321

R320

R319

COIL FOR 4WAY VALVE

L1 L2 S

Q300~305 MOS-FET

L01

SURGE

ABSORBER

P07 BLK

VARISTOR

F01 FUSE 25A AC250V

P03

ORN

L2 S

P01 BLK

L1 L2

~ ~

POWER SUPPLY 208/230-1-60

CN300

CN700

P02 WHI

BLK

3 3

WHI

2 2

RED

1 1

FAN MOTOR

6 6 5 5 4 4

PMV

3 3 2 2 1 1

PULSE MOTOR VALVE

3 3 2

CN603

1 1

TEMP. SENSOR)

2 2

CN602

1 1

TEMP. SENSOR)

3 3 2

CN601

1 1

(DISCHARGE PIPE

TEMP. SENSOR)

2 2

CN600

(CONDENSER PIPE

TEMP. SENSOR)

CN500

PRESSURE SW.

COLOR IDENTIFICATION

BLK:BLACK BLU:BLUE RED:RED GRY:GRAY PNK:PINK

(SUCTION PIPE

(OUTDOOR

WHI:WHITE BRW:BROWN ORN:ORANGE YEL:YELLOW PUR:PURPLE

Indoor Terminal Block

POWER SUPPLY (From Outdoor Unit)

208/230-1-60

1 1 2 2

(TC)

(TA)

CN62

(BLU)

1 1 2 2

CN61

(WHI)

1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9

MCC-5044

1010 11 11

CN10

Wireless Unit Assembly

(WHI)

Heat Exchanger Sensor

Thermo Sensor

L1 L2 S

BLK

WHI

3 1

CN01

T3.15A Fuse F01

Varistor

WHI

BLU

10 11

CN21

(YEL)

RED

GRN&YEL

Heat Exchanger

CN51

Line Filter

DC5V DC12V

Main PC Board

WP-020

1 1

2 2

3 3

4 4

5 5

CN31

(WHI)

1 1 2 2 3 3

CN33

(WHI)

1 1 2 2 3 3 4 4 5 5

CN32

(WHI)

WHI YEL YEL YEL YEL

1 1 2 2 3 3 4 4 5 5

CN22

(WHI)

1 2 3 4

6 6 5 5 4 4 3 3 2 2 1 1

Color indication

BRW:BROWN YEL:YELLOW BLK:BLACK

Power Supply Circuit

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

Fan Motor

Louver Motor

– 18 –

5-2. RAS-12LKV-UL /RAS-12LAV-UL

FILE NO. SVM-10019

COMPRESSOR

1 1 2 2

3 3

YEL

BRW

YEL

ORN

1 2 1

REACTOR

RED WHI BLK

P25

P23

P21

P35

P34

P19

P18 P11

P08

P04 P05 P06

P24

P22

P20

DB01

Q404

Q200~205 IGBT

POWER RELAY

DB02

P33 P31 P30

PUR

R221

R220

R219

L03

RELAY

P.C.BOARD (MCC-5009)

C13

C12 C14

1 2 1 2

REACTOR

Outdoor Terminal Block

F03

FUSE

T3.15A

AC250V

CN701 P32

1 3 1

L1 L2 S

R321

R320

R319

COIL FOR 4WAY VALVE

Q300~305 MOS-FET

L01

SURGE

ABSORBER

P07 BLK

VARISTOR

F01 FUSE 25A AC250V

P03

ORN

L2 S

P01 BLK

L1 L2

~ ~

POWER SUPPLY 208/230-1-60

CN300

CN700

P02 WHI

BLK

3 3

WHI

2 2 1 1

6 6 5 5 4 4 3 3 2 2 1 1

CN603

CN602

CN601

CN600

CN500

RED

FAN MOTOR

PMV

PULSE MOTOR VALVE

3 3 2 1 1

(SUCTION PIPE

TEMP. SENSOR)

2 2 1 1

TEMP. SENSOR)

3 3 2 1 1

(DISCHARGE PIPE

TEMP. SENSOR)

2 2 1

(CONDENSER PIPE

TEMP. SENSOR)

PRESSURE SW.

COLOR IDENTIFICATION

BLK:BLACK BLU:BLUE RED:RED GRY:GRAY PNK:PINK

(OUTDOOR

WHI:WHITE BRW:BROWN ORN:ORANGE YEL:YELLOW PUR:PURPLE

Indoor Terminal Block

POWER SUPPLY (From Outdoor Unit) 208/230-1-60

SHEET METAL

BLK

CN02

Fuse F01

T3.15A 250VAC

1 1 2 2

(TA)

1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9

MCC-5044

1010 11 11 1212

Wireless Unit Assembly

1313 1414 1515

CN10

(WHI)

CN62

(BLU)

1 1 2 2

CN61

(WHI)

BLU BLU BLU BLU BLU BLU BLU BLU WHI

Varistor

Heat Exchanger Sensor

(TC)

Thermo Sensor

L1 L2 S

3 1

CN01

Line Filter

1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8

9 9 1010 11 11 1212 1313 1414 1515

CN21

(WHI)

BLK

WHI

RED

CN51

Main PC Board

MCC-5045

Heat Exchanger

GRN&YEL

DC5V DC12V

1 1 3 3

4 4 5 5 6 6

CN31

(WHI)

1 1 2 2 3 3 4 4 5 5

CN32

(WHI)

WHI YEL YEL YEL YEL

1 1 2 2 3 3 4

5 5

CN22

(WHI)

1 2 3 4

DC Motor

Fan Motor

Louver Motor

Color indication

BRW:BROWN YEL:YELLOW BLK:BLACK RED:RED BLU:BLUE WHI:WHITE

Power Supply Circuit

GRN & YEL: GREEN & YELLOW

– 19 –

6-1. Indoor Unit

FILE NO. SVM-10019

6. SPECIFICATIONS OF ELECTRICAL PARTS

No.

Fan motor

(for indoor)

2 Room temp. sensor (TA-sensor) 3 Heat exchanger temp. sensor (TC-sensor) 4 Louver motor Output (Rated) 1W, 16 poles, DC12V

Parts name

RAS-09LKV-UL

RAS-12LKV-UL

AFS-220-20-4D AC240V, 20W

ICF-340U30-2 AC220V, 20W

( − ) ( − )

MP24Z3T

10kΩ at 25°C 10kΩ at 25°C

SpecificationsType

6-2. Outdoor Unit

No.

Reactor

2 Outdoor fan motor 3 Suction temp. sensor (TS sensor)

Parts name

Model name

CH-57

ICF-340UA40-2 DC340V, 40W

(Inverter attached)

L = 10mH, 16A

10kΩ (25°C)

Rating

4 Discharge temp. sensor (TD sensor) 5 Outside air temp. sensor (TO sensor) 6 Heat exchanger temp. sensor (TE sensor) 7 Terminal block (5P) 30A, AC600V

Compressor

9 COIL FOR P.M.V.

10 Coil for 4-way valve

11 Pressure SW.

RAS-09LAV-U

RAS-12LAV-UL

(Inverter attached) (Inverter attached) (Inverter attached)

DA89X1C-23FZ2

DA111A1F-20F2

CAM-MD 12TCTH-4

STF

ACB-4UB82W 4.7 MPa

62kΩ (20°C) 10kΩ (25°C) 10kΩ (25°C)

3-phases 4-poles 680W

3-phases 4-poles 750W

DC12V

– 20 –

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-09LKV-UL / RAS-09LAV-UL

INDOOR UNIT

Indoor heat

exchanger

Temp. measurement

FILE NO. SVM-10019

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe Outer dia. : 3/8 in (9.52mm) Thickness : 1/32 in (0.8mm)

4-way valve

Cross flow fan

Deoxidized copper pipe

Outer dia. : 1/4 in (6.35mm)

Thickness : 1/32 (0.8mm)

Sectional shape of heat insulator

Muffler

High Pressure switch

Compressor DA89X1C-23FZ2

Fusible plug

Outdoor heat

exchanger

Allowable height

difference : 33ft (10mm)

Strainer

Pulse Modulating valve at liquid side

Strainer

Max. : 66ft (20m) Min. : 6.6ft (2m)

Chargeless : 50ft (15m) Charge : 0.22oz/ft

(51 to 66ft)

[20g/m (16 to 20m)]

Allowable pipe length

Temp. measurement

Propeller fan

Refrigerant amount : 1.77lbs (0.80kg)

OUTDOOR UNIT

NOTE :

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

NOTE :

• The maximum pipe length of this air conditioner is 66ft (20 m). When the pipe length exceeds 50ft (15m), the additional

charging of refrigerant, 0.22 oz/ft (20g/m) for the part of pipe exceeded 50ft (15m) is required. [(Max. 0.22 lbs (100g)]

– 21 –

RAS-12LKV-UL / RAS-12LAV-UL

INDOOR UNIT

Indoor heat

exchanger

Temp. measurement

FILE NO. SVM-10019

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe

Outer dia. : 3/8 in. (9.52mm)

Thickness : 1/32 in. (0.8mm)

4-way valve

Cross flow fan

Outer dia. : 1/4 in. (6.35mm)

Thickness : 1/32 in. (0.8mm)

Muffler

Outdoor heat

exchanger

Deoxidized copper pipe

Sectional shape of heat insulator

Muffler

Compressor DA111A1F-20F1

Split capillary

Ø1.2 x 80

Allowable height

difference : 33ft (10m)

Allowable pipe length

Strainer

Pulse Modulating valve at liquid side

Max. : 66ft (20m)

Min. : 6.6ft (2m)

Chargeless : 50 ft (15m) Charge : 0.22oz/ft

(51 to 66 ft)

[20g/m (16 to 20m)]

Temp. measurement

Propeller fan

Refrigerant amount : 2.43 lbs (1.10kg)

OUTDOOR UNIT

Ø1.2 x 80

NOTE :

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

NOTE :

• The maximum pipe length of this air conditioner is 66ft (15 m). When the pipe length exceeds 50ft (15m), the additional

charging of refrigerant, 0.22 oz/ft (20g/m) for the part of pipe exceeded 15m is required. [Max. 0.22 lbs (100g)]

– 22 –

FILE NO. SVM-10019

7-2. Operation Data

Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor

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

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

80/67 98/75 137 to 160 54 to 57 99 to 102

(26.7/19.4) (35/23.9) (0.9 to 1.1) (12 to 14) (37 to 39)

12LKV-UL High High 77

Tempeature Model name Standard Heat exchanger Indoor Outdoor Compressor

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

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

70/60 47/43 363 to 392 102 to 105 32 to 37

(21.1/15.6) (8.3/6.1) (2.5 to 2.7) (39 to 41) (0 to 3)

09LKV-UL

12LKV-UL

116 to 145 52 to 55 104 to 107

(0.8 to 1.0) (11 to 13) (42 to 44)

377 to 406 106 to 106 32 to 36 (2.6 to 2.8) (41 to 43) (0 to 2)

High High 6009LKV-UL

High High

High High 64

NOTES :

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

2. Connecting piping condition : 16 ft (5m)

– 23 –

8-1. Indoor Unit

FILE NO. SVM-10019

8. CONTROL BLOCK DIAGRAM

Heat Exchanger Sensor (Tc)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Converter

(D.C circuit)

Noise Filter

M.C.U.

Functions

• Cold draft preventing Function

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing (Temperature Processing)

• Timer

• Serial Signal Communication

• Clean Function

Serial Signal Transmitter/Receiver

Indoor Unit Control Unit

Louver

Motor

Louver Motor Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

From Outdoor Unit

208/230-1-60

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Infrared Rays, 36.7kHz

COMFORT SLEEP

QUIET

SLEEP (1,3,5,9 OFF TIMER)

– 24 –

8-2. Outdoor Unit (Inverter Assembly)

detect

Current

circuit

Gate drive

detect

Current

FILE NO. SVM-10019

Compressor

Outdoor

Fan motor

Inverter

(DC → AC)

P.M.V. : Pulse Motor Valve

M.C.U. : Micro Control Unit

MICRO-COMPUTER BLOCK DIAGRAM

M.C.U

MCC5009 (P.C.B) OUTDOOR UNIT

• PWM synthesis function

• Input current release control

circuit

Indoor unit

send/receive

circuit

Gate drive

• IGBT over-current detect control

• Outdoor fan control

• High power factor correction control

• Inverter output frequency control

• A/D converter function

• P.M.V. control

• Discharge temp. control

• 4-way valve control

• Signal communication to indoor unit

4MHz

Clock

frequency

circuit

High Power

factor Correction

Converter

(AC → DC)

sensor

Input current

Filter

Noise

Inverter

(DC → AC)

Relay

circuit

of P.M.V.

Driver circuit

valve

4-way

P.M.V.

208/230-1-60

For INDOOR UNIT

Discharge

temp. sensor

Outdoor air

temp. sensor

Suction temp.

– 25 –

sensor

temp.sensor

Heat exchanger

9. OPERATION DESCRIPTION

FILE NO. SVM-10019

9-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air conditioner, which uses AC or DC motor for the indoor for motor and the outdoor fan motor. And the capacityproportional control compressor which can change the motor speed in the range from 11 to 96 rps is mounted. The DC motor drive circuit is mounted to the indoor unit. The compressor and the inverter to control fan motor are mounted to the outdoor unit.

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

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

The outdoor unit controller receives operation command from the indoor unit side, and controls the outdoor fan and the pulse Modulating valve. (P.M.V) Besides, detecting revolution position of the compressor motor, the outdoor unit controller controls speed of the compressor motor by controlling output voltage of the inverter and switching timing of the supply power (current transfer timing) so that motors drive according to the operation command. And then, the outdoor unit controller transfers reversely the operating status information of the outdoor unit to control the indoor unit controller.

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

1. Role of indoor unit controller

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

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

• Judgment of the indoor heat exchanger temperature by using heat exchanger sensor (TC sensor) (Prevent-freezing control, etc.)

• Louver motor control

• Indoor fan motor operation control

• LED (Light Emitting Diode) display control

• Transferring of operation command signal (Serial signal) to the outdoor unit

• Reception of information of operation status (Serial signal including outside temp. data) to the outdoor unit and judgment/display of error

• Air purifier operation control

2. Role of outdoor unit controller

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

• Compressor operation control

• Operation control of outdoor fan motor

• P.M.V. control

• 4-way valve control



Operations followed to judgment



of serial signal from indoor side.



• Detection of inverter input current and current release operation

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

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

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

• Detection of outdoor temperature and operation revolution control

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

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

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

• Operation mode set on the remote controller

• Compressor revolution command signal defined

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

• Temperature of indoor heat exchanger

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

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

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

The following signals are sent from the outdoor unit controller.

• The current operation mode

• The current compressor revolution

• Outdoor temperature

• Existence of protective circuit operation

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

Contents of judgment are described below.

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

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

unit controller, it is assumed as a trouble.

– 26 –

FILE NO. SVM-10019

9-2. Operation Description

1. Basic operation ........................................................................................................... 28

1. Operation control ................................................................................................... 28

2. Cooling/Heating operation ..................................................................................... 29

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

4. DRY operation........................................................................................................ 29

2. Indoor fan motor control ............................................................................................. 30

3. Outdoor fan motor control........................................................................................... 32

4. Capacity control .......................................................................................................... 33

5. Current release control ............................................................................................... 33

6. Release protective control by temperature of indoor heat exchanger........................ 34

7. Defrost control (Only in heating operation) ................................................................ 35

8. Louver control ............................................................................................................. 36

1) Louver position....................................................................................................... 36

2) Air direction adjustment ......................................................................................... 36

3) Swing ..................................................................................................................... 36

9. ECO operation ............................................................................................................ 37

10. Temporary operation................................................................................................... 38

11. Discharge temperature control ................................................................................... 38

12. Pulse Modulating valve (P.M.V.) control ..................................................................... 39

13. Self-Cleaning function ................................................................................................ 40

14. Remote-A or B selection ............................................................................................ 42

15. QUIET mode ............................................................................................................. 43

16. COMFORT SLEEP mode ......................................................................................... 43

17. One-Touch Comfort .................................................................................................. 43

18. Hi-POWER Mode ...................................................................................................... 44

19. FILTER Indicator ........................................................................................................ 44

9-3. Auto Restart Function ..

9-3-1. How to Cancel the A uto Restart Function ................................................................. 45

9-3-2. How to set the Au to Restar t Function ....................................................................... 46

9-3-3. Power Failure During Timer Operation ................................................................... 46

9-4. Remote Controller and Its Fuctions

9-4-1. Parts Name of Remote Contr oller ............................................................................. 47

9-4-2. Operation of remote control ...................................................................................... 47

9-4-3. Name and Functions of Indications on Remote Contr oller ....................................... 50

– 27 −

FILE NO. SVM-10019

Item

1. Basic operation

Operation flow and applicable data, etc.

1. Operation control

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

1) The operation conditions are selected by the remote controller as shown in the below.

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

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

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

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

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

Selection of

operation conditions

ON/OFF

Remote controller

Control contents of remote controller

• ON/OFF (Air conditioner/Air purifier)

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

• Temperature setup

• Air direction

• Swing

• Air volume select (AUTO/LOW/LOW+/MED/MED+/HIGH)

• ECO

• ON timer setup

• OFF timer setup

• Hi-POWER

• COMFORT SLEEP

• QUIET

• PRESET

• ONE-TOUCH

Description

Signal receiving

Indoor unit control

Operation command

Serial signal send/receive

Outdoor unit control

Indoor unit

Indoor unit control

• Command signal generating function of indoor unit operation

• Calculation function (temperature calculation)

• Activation compensation function of indoor fan

• Cold draft preventive function

• Timer function

• Indoor heat exchanger release control

Outdoor unit

Outdoor unit control

• Frequency control of inverter output

• Waveform composite function

• Calculation function (Temperature calculation)

• AD conversion function

• Quick heating function

• Delay function of compressor reactivation

• Current release function

• GTr over-current preventive function

• Defrost operation function

• Indoor fan motor

• Louver motor

Inverter

• Compressor

• Outdoor fan motor

• 4-way valve

• Pulse Modulating valve (P.M.V.)

– 28 –

FILE NO. SVM-10019

Item

1. Basic operation

Operation flow and applicable data, etc.

2. Cooling/Heating operation

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

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

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

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

Operation ON

Indoor unit control

Sending of operation command signal

Outdoor unit control

Setup of remote controller

Indoor fan motor control / Louver control / Operation Hz

Control (Requierment)

Compressor revolution control / Outdoor fan motor control / Operation Hz control (Include limit control)

4-way valve control In cooling operation: ON In heating operation: OFF

Pulse Modulating valve control

[ ]

Description

3. AUTO operation

Selection of operation mode As shown in the following figure, the operation starts by selecting automatically the status of room temperature (Ta) when starting AUTO operation.

*1. When reselecting the operation mode, the fan

speed is controlled by the previous operation mode.

°C

Cooling operation

Ts + 1

Monitoring (Fan)

Ts – 1

Heating operation

4. DRY operation

DRY operation is performed according to the difference between room temperature and the setup temperature as shown below.

In DRY operation, fan speed is controlled in order to prevent lowering of the room temperature and to avoid air flow from blowing directly to persons.

°F [ C]

+2.0 (1.0)

L– (W5)

(W5+W3) / 2

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

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

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

4) When AUTO operation has started within 2 hours after heating operation stopped and if the room temperature is 68°F (20°C) performed with ”Super Ultra LOW” mode for 3 minutes. Then, select an operation mode.

5) In AUTO mode, either cooling or heating operation will be selected. When room temperature reach set temperature commpressor will stop. In case that the compressor stops for 15 minutes, the

AUTO mode will reselect cooling or heating operation.

1) Detects the room temperature (Ta) when the DRY operation started.

2) Starts operation under conditions in the left figure according to the temperature difference between the room temperature and the setup temperature (Tsc). Setup temperature (Tsc) = Set temperature on remote controller (Ts) + 0~1.0°C (0 to 2°F)

3) When the room temperature is lower 2°F (1°C) or less than the setup temperature, turn off the compressor.

or more, the fan operation is

+1.0 (0.5)

Tsc

SUL (W3)

Fan speed

− 29 −

FILE NO. SVM-10019

Item

2. Indoor fan motor control

COOL ON

Fan speed setup

AUTO

°F [°C]

+4.5 (+2.5)

+3.5 (+2.0)

+2.7 (+1.5)

+2.0 (+1.0)

Operation flow and applicable data, etc.

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

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

MANUAL

(Fig. 1)

Indication

L+

M+

Fan speed

(L + M) / 2

(M + H) / 2

(Fig. 2)

Air volume AUTO

M+(WB)

*3 : Fan speed = [(M+) –L] x 3/4 + L *4 : Fan speed = [(M+) –L] x 2/4 + L *5 : Fan speed = [(M+) –L] x 1/4 + L

Description

* Symbols

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

* The values of fan speed and air flow

volume indicate on the table are measured

when the louver is inclined downward. Fan speed and air flow volume broadly vary with position of louver.

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

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

Tsc

L(W6)

(Linear approximation from M+ and L)

+1.0 (+0.5)

(Table 1) Indoor fan air flow rate

Fan speed

level

WF UH 1210 336 (571) 1510 433 (735)

WE H 1210 336 (571) 1510 433 (735)

WD UH M+ UH 1170 321 (546) 1480 422 (717)

WC H H 1120 303 (515) 1430 404 (686)

WB M+ M+ 1040 274 (465) 1280 350 (594)

WA M 1000 248 (421) 1220 328 (557)

W9 M L+ 960 235 (400) 1150 302 (514)

W8 L 870 200 (340) 1000 248 (421)

W7 L+ L- L+ 850 194 (330) 980 241 (409)

W6 L L 760 159 (270) 920 219 (372)

W5 L- UL L- 760 159 (270) 900 212 (360)

W4 UL UL 700 141 (240) 840 190 (323)

W3 SUL SUL 650 118 (200) 770 165 (280)

W2 SUL 500 65 (110) 620 110 (187)

W1 500 65 (110) 520 74 (126)

DRYHEATCOOL

RAS-09LKV-UL

Fan speed Air flow rate Fan speed Air flow rate

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

RAS-12LKV-UL

– 30 –

(

)

FILE NO. SVM-10019

Item

2. Indoor fan motor control

HEAT

Fan speed setup

AUTO

TC ≥ 107.6ºF (42 C)

Operation flow and applicable data, etc.

MANUAL

Indication Fan speed

L+

M+

YES

Tc ºF (ºC)

126 (52) 124 (51)

(Fig. 3)

(L + M) / 2

(M + H) / 2

Min air flow rate contro

Limited to Min WD tap

Description

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

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

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

for prevent high temperature of heat exchanger.

4) Cold draft prevention, the fan speed is controlled by temperature of the

indoor heat exchanger (Tc) as shown in Fig. 6 for keep warm temperature

of air flow.

5) In order to prevent Cold draft when compressor sto

p during heating

operation. Then louver will move to upper position and fan speed will

reduce or off.

108 (42) 106 (41)

* Fan speed=

L+)] x 1 4 + L+ L+)] x 2 4 + L+ L+)] x 3 4 + L+

Fan spee

AUT

L+ (W9)

M+ (WD)

H (WE

Basic fan control

Ta °F [°C]

TSC

-1.0 (-0.5)

-2.0 (-1.0)

-2.7 (-1.5)

-3.5 (-2.0)

-4.5 (-2.5)

-9.0 (-5.0)

-10.0 (-5.5)

d e

*1: Fan speed = [(M+) *2: Fan speed = [(M+) *3: Fan speed = [(M+)

(Fig. 4)

− (

(Calculated with linear approximation from M+ and L+)

(Fig. 5)

No limi

W8) + W

Cold draft preventive control

°F (°C)

115 (46) 115 (46)

113 (45) 113 (45) 91 (33)

*1 *2

91 (33) 91 (33) 70 (21)

90 (32) 90 (32) 68 (20)

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

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

* No limitation while fan speed MANUAL mode is in stabilit * A: When Tsc ≥ 75°F (24°C), A is 75°F (24°C), and

when Tsc < 75°F (24°C), A is Tsc

Tsc: Set value

93 (34)

H (WE

Linear-approximate H and SUL with Tc

SUL (W2

Stop

Fan speed MAN Fan speed AUTO in stabilit Fan speed AUTO in startin

AL in startin

(Fig. 6)

[In starting and in stability]

FAN AUTO

FAN Manual

In starting

• Until 12 minutes passed after operation start

• When 12 to 25 minutes passed after operation start and room temp. is 5.4°F (3°C) or lower than set temp.

• Room temp. < Set temp. -7°F (– 4°C)

• When 12 to 25 minutes passed after operation start and room temp. is higher than [set temp. -5.4ºF (–3°C)]

• When 25 minutes or more passed after operation start

• Room temp. ≥ Set temp. -6.3°F (–3.5°C)

In stability

– 31 –

FILE NO. SVM-10019

Item

3. Outdoor fan motor control

Indoor unit controller

1) Outdoor unit operation command (Outdoor fan control)

when the motor OFF.

Operation flow and applicable data, etc.

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

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

speed system is used. However, it is limited to 8 stages for reasons of controlling.

Air conditioner ON

(Remote controller)

2) Fan speed ≥ 400. (by strong wind)

YES

Fan motor OFF continues

(Use wind for heat

exchanging)

Fan motor ON

Description

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

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

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

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

3) Fan lock

4) Motor operates as shown in the table below.

In cooling operation

Compressor speed (rps)

To ≥ 100°F (38°C) To ≥ 82°F (28°C)

During

ECO mode

When To is abnormal

Tap

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

f 8

To ≥ 59°F (15°C) To ≥ 42°F (5.5°C)

To ≥ 32°F (0°C) To < 32°F (0°C)

To ≥ 100°F (38°C) To ≥ 100°F (38°C)

RAS-09LAV-UL RAS-12LAV-UL

200 200 300 300 370 370 440 440 440 440 500 500 550 550

600 600

YES

Air conditioner

OFF

~ 13.8 ~ 31.7

MIN MAX MIN MAX MIN MAX

f 2 f 3 f C f D f E f F f 2 f 3 f A f C f D f F f 2 f 3 f 7 f A f 9 f C f 1 f 3 f 2 f 5 f 4 f 7 f 1 f 1 f 1 f 2 f 2 f 4 f 0 f 0 f 0 f 1 f 1 f 2 f 2 f 3 f B f C f C f D f 2 f 3 f 2 f 3 f B f C f D f F f D f F f F

32.3 ~ MAX

f D

Outdoor fan speed (rpm)

Tap

f 9 f A

f B f C f D

f E

f F

RAS-09LAV-UL RAS-12LAV-UL

Alarm

display

Compressor speed (rps)

To ≥ 50°F (10°C)

During

ECO mode

When To is abnormal

600 650 600 700 650 700 700 800 700 800 700 800 700 900

To ≥ 42°F (15°C) To ≥ 22°F (-5°C) To < 22°F (-5°C) To ≥ 50°F (10°C) To ≥ 42°F (15°C) To ≥ 22°F (-5°C) To < 22°F (-5°C)

In Heating operation

~16.8 ~47.9

f 3 f 8 f 9 f 3 f 9 f A f 8 f A f D

f B f C f D

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

f A f B f D

48.5 ~ MAX

– 32 –

FILE NO. SVM-10019

Item

4. Capacity control

Remote contr oller Indoor unit

Operation flow and applicable data, etc.

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

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

Set temp. (Ts)

Ts −Ta

Correction value of Hz signal

Detection of electromotive force

of compressor motor winding

Detection of motor speed (Operation Hz)

and rotor position

Correction value of Hz signal- Operating Hz

Inverter output change

Commutation timing change

Room temp. (Ta)

Description

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

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

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

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

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

* The contents of control

operation are same in cooling operation and heating operation

5. Current release control

Outdoor unit inverter main

circuit control current

Operating current ≤

Setup value

Low

Capacity control continues

113ºF (45ºC) 104ºF (40ºC)

61ºF (16ºC)

52ºF (11ºC)

Outdoor temp.

Change of compressor speed

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

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

Outdoor temp. To

Setup of current release point

High

111ºF (44ºC)

102ºF (39ºC)

60ºF (15.5ºC)

51ºF (10.5ºC)

Reduce compressor speed

Current decrease

Cooling current release value

RAS-09LAV-UL

3.97A

4.35A

6.30A

RAS-12LAV-UL

4.27A

4.88A

8.47A

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

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

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

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

Heating current release value

RAS-09LAV-UL

6.30A

RAS-12LAV-UL

7.72A

8.10A

8.47A

– 33 –

FILE NO. SVM-10019

Item

6. Release protective control by temperature of indoor heat exchanger

45 F

(7 C)

43 F

(6 C)

41 F

(5 C)

Indoor heat exchanger temperature

Operation flow and applicable data, etc.

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

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

Usual cooling capacity control

When the value is in Q zone, the

compressor speed is kept.

Reduction of compressor speed

Description

1) When temperature of the indoor heat exchanger drops below 41°F (5°C), the compressor speed is reduced. (P zone)

2) When temperature of the indoor heat exchanger rises in the range from 43°F (6°C) to under 45°F (7°C), the compressor speed is kept. (Q zone)

3) When temperature of the indoor heat exchanger rises to 45°F (7°C) or higher, the capacity control operation returns to the usual control in cooling operation. (R zone)

131 F (55 C)

126 F (52 C)

118 F (48 C)

Indoor heat exchanger temperature

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

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

Reduction of compressor speed

When the value is

in Q zone, the compressor speed is kept.

Usual heating capacity control

1) When temperature of the indoor heat exchanger rises in the range from 126°F (52°C) to 131°F (55°C), compressor speed is kept. (Q zone)

When temperature of the indoor heat exchanger drops in the range from 118°F (48°C) to under 131°F (55°C) the compressor speed is kept. (Q zone)

2) When temperature of the indoor heat exchanger rises to 131°F (55°C) or higher, the compressor speed is reduced. (P zone)

3) When temperature of the indoor heat exchanger does not rise to 126°F (52°C), or when it drops below to 118°F (48°C), the capacity control operation returns to the usual control in heating operation. (R zone)

– 34 –

FILE NO. SVM-10019

Item

7. Defrost control (Only in heating operation)

Start of heating operation

0’ 10’ 15’ 27’40” 34’

23 F

(–5 C)

19 F

(–7 C)

−

4 F

(–20 C)

Outdoor heat exchanger temperature

A zone

B zone

C zone

Operation flow and applicable data, etc.

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

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

Operation time (Minute)

C zone

A zone

B zone

* The minimum value of Te sensor 10 to 15 minutes

after start of operation is stored in memory as Te0.

Table 1

When Te0 - TE ≥ 4.5°F (2.5°C) continued for 2 minutes in

A zone, defrost operation starts.

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

When Te0 - TE ≥ 5.4°F (3°C) continued for 2 minutes in

C zone, defrost operation starts.

Description

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

• Defrost operation in A to C zones

1) Stop operation of the compressor for 20 seconds.

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

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

4) When temperature of the indoor heat exchanger becomes 100°F (38°C) or lower, stop the indoor fan.

• Returning conditions from defrost

operation to heating operation

1) Temperature of outdoor heat exchanger rises to 46°F (8°C) or higher.

2) Temperature of outdoor heat exchanger is kept at 41°F (5°C) or higher for 80 seconds.

3) Defrost operation continues for 15 minutes.

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

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

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

– 35 –

FILE NO. SVM-10019

Item

8. Louver control

1) Louver position

Operation flow and applicable data, etc.

This function controls the air direction of the indoor unit.

• The position is automatically controlled according to the operation mode (COOL/HEAT).

• The set louver position is stored in memory by the microcomputer, and the louver returns to the stored position when the next operation

is performed. (Cooling/Heating memory position)

The angle of the louver is indicated as the louver closes fully is 0°.

1) Louver position in cooling operation

Initial setting of "Cooling storage position" Louver : Directs downward (35.3°)

2) Louver position in heating operation

Description

2) Air direction adjustment

Horizontal

blowing

3) Swing

Inclined blowing

• Swing operation is perfor in range 35° with the Fixed position as

the center.

• If the swing range exceeded either upper or lower limit position,

swing operation is perfomed in range 35° from the limit.

Heating operation/

AUTO (HEAT)

Initial setting of “Heating storage position” Louver : Directs downward (80.5 )

Air direction

Blowing

downward

Inclined blowing

• The louver position can be arbitrarily set up by pressing [FIX] button.

Horizontal

blowing

• Swing When pressing [SWING] button during operation, the louver starts swinging.

Upper Limit Position.

Swing

range 35

Fixed Position before start swing.

17.5

Lower Limit Position.

Upper Limit Position.

Fixed

Position before start swing

Swing range 35

Lower Limit Position

– 36 –

FILE NO. SVM-10019

Item

9. ECO operation

11.7

11.0

10.0

9.0

8.0

7.0

6.3

5.5

4.5

3.5

2.7

2.0

1.0

(Room temp. – Set temp.)

-1.0

-2.0

-3.5

(5.5)

(1.5) (1.0)

TSC

(-0.5)

(-1.0)

(-2.0)

(°C)°F

(6.5) (6.0)

(5.0) (4.5) (4.0)

(3.5) (3.0) (2.5) (2.0)

(0.5)

Operation flow and applicable data, etc.

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

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

Frequency

Zone

Dry Max

*12 *11

*10

4 3

Min

OFF

1H 2H

Time

Description

1) The control target temperature increase 1.0°F (0.5ºC) per hour

up to 3.5°F (2°C) starting from the

set temperature when ECONO has been received.

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

operation.

3) The compressor speed is

FAN

controlled as shown in the left figure.

The indoor fan speed is not controlled and can be selected

during the ECO operation.

< Heating Operation >

F(oC)

0.0 (0.0)

-2.0

(1.0)

-3.5

(2.0)

-5.5

(3.0)

-7.0

(4.0) (5.0)

-9.0 (6.0)

-11.0 (7.0)

-12.5 (8.0)

-14.0

-16.0

-18.0

-22.0

(9.0)

(10.0) (11.0)-20.0

(12.0)

ECO Start 30 minutes Time

Room temp. - Set temp.

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

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

Compressor stop

Zone

B Zone

C Zone

Compressor speed (Hz)

Zone

09LKV-UL 12LKV-UL

B C

A Zone

B Zone

C Zone

Model

20 13

Linear aproximation

between A to C

50 43

Hz 09LKV-UL 12LKV-UL

Cool min

DRY max

1) The difference of room temperature and set temperature are separated in to A zone, B zone and C zone.

Three zone will changed again 30

minutes after ECO operation start.

2) The compressor speed is controlled as shown on the table.

3) The indoor fan speed is not controlled and can be selected during the ECO operation.

– 37 –

FILE NO. SVM-10019

Item

10. Temporary operation

Operation flow and applicable data, etc.

Pressing [RESET] button starts the temporary operation of [AUTO] operation. When keeping [RESET] button pressed for 10 seconds or more, the temporary [COOL] operation is performed.

1) When pressing [RESET] button, the temporary [AUTO] operation starts.

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

Filter lamp ON

Did you press [RESET] button

for 3 seconds or more?

YES

Did you press [RESET] button

for 10 seconds or more?

Set or Reset [AUTO RESTART]

YES

Press RESET button.

Temporary [AUTO] operation

Temporary [COOL] Operation

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

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

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

11. Discharge temperature control 1. Purpose

Td value

243°F (117°C)

233°F (112°C)

226°F (108°C)

221°F (105°C)

208°F (98°C)

Control operation

Judges as an error and stops the compressor.

Reduce the compressor speed.

Reduce slowly compressor speed.

Keeps the compressor speed.

If the operation is performed with lower speed than one commanded by the serial signal, speed is slowly raised up to the commanded speed.

Operates with speed commanded by the serial signal.

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

2. Operation

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

Description

– 38 –

FILE NO. SVM-10019

Item

12. Pulse Modulating valve (P.M.V.)

control

SH control

Operation flow and applicable data, etc.

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

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

Starting up

Initialize

Move to

initial position

Compressor ON

release control

Description

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

* In this time, “Click” sound may be

heard.

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

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

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

5) When operation is OFF by the remote controller or when compressor is OFF by room temperature control, the open degree of valve is adjusted to the stop position.

PMV open degree control

Turn OFF by

remote controller

Compressor Stop by "Room Temperature

Control"

Move to "Stop

Position" (Setup

from factory)

* SH (Super Heat amount) =

Ts (Temperature of suction pipe of the compressor) – Tc or Te (Heat exchanger temperature at evaporation side)

* PMV: Pulse Modulating Valve

Defrosting

operation

Move to "Defrost

Position" (Setup

from factory)

– 39 –

FILE NO. SVM-10019

Item

Operation flow and applicable data, etc.

13. Self-Cleaning

function

Unit now performing cooling or dry operation

Press “STOP” button

Only timer indicator lights, and Self Cleaning operation starts

Time set now elapses

Operation stops

Description

1. Purpose

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

Self-Cleaning operation

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

2. Operation

1) When the stop signal from the remote

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

2) The period of the Self-Cleaning operation

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

3) After the Self-Cleaning operation has

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

• During Self-Cleaning operations: The louver opens slightly. The indoor fan operates continuously at a speed of 500 rpm.

Self-Cleaning operation times

Self-Cleaning operation time

No Self-Cleaning operation

performed (0 minutes)

30 mins.

Cooling: Auto (cooling) Dry

Heating: Auto (heating)

Auto (fan only)

Shutdown

Operation time

Up to 10 minutes

10 minutes or longer

No Self-Cleaning operation performed

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

second time without delay (within 10 minutes).)

– 40 –

FILE NO. SVM-10019

Item

13. Self-Cleaning

• Self-Cleaning diagram

Operation flow and applicable data, etc.

Description

function

Operation display ON OFF OFF

FCU fan

FCU louver OPEN OPEN (12.7º) CLOSE

Timer display

Compressor

CDU fan ON or OFF

rpm is depend on presetting. (500RPM)

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

depend on presetting per room temperature.

Cool mode or dry mode

operation more than 10 mins.

ON ON

ON or OFF

Turn off by remote controller or

timer-off function.

OFF OFF

Self-Cleaning mode

operate 30 mins.

Automatically turn-off.

ON or OFF

How to Set or Cancel Self-Cleaning operation.

(Default setting from factory is ON)

OFF

Operation time

1. Connect jumper lead at J201 of the indoor P.C. board

assembly.

2. To cancel Self-Cleaning operation.

Turn the power supply ON

Press the [RESET] button located on the front

panel of the indoor unit for more than 3 seconds.

After 3 seconds, the unit beeps three times.

The Self-Cleaning is cancelled.

3. To set Self-Cleaning operation.

Turn the power supply ON

Press the [RESET] button located on the front

panel of the indoor unit for more than 3 seconds.

After 3 seconds, the unit beeps three times

and the indicator blinks for 5 seconds.

The Self-Cleaning is set.

One J201 is added, it will effect as following.

The operation when press the RESET button for 3 seconds will be changed from Set/Cancel the AUTO-RESTART to Set/Cancel the Self-Cleaning. AUTO-RESTART function will not activate. In case of AUTO-RESTART is need, disconnect the jumper J201 and set it again after Set/Cancel the Self-Cleaning finished.

Note :

J201 is near the MCU, so so take steps to ensure that it will not be exposed to excessive of heat. Also take care to avoid solder bridging with the surrounding components.

− 41 −

FILE NO. SVM-10019

Item

PCB NO : WP-020

Operation flow and applicable data, etc.

J201

Description

PCB NO : MCC-5045

14. Remote-A or B selection

PCB NO : MCC-5046

Setting the remote controller

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

Remote Control B Setup.

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

2) Point the remote control at the indoor unit.

3) Push and hold CHK • button on the Remote

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

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

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

Control B is memorized.

Note : 1. Repeat above step to reset Remote Control

to be A.

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

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

1. Purpose

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

2. Description

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

3. Operation

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

“B” Display

“00” Display

PRESET FAN

− 42 −

FILE NO. SVM-10019

Item

15. QUIET mode

Operation flow and applicable data, etc.

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

speed L

−

until the [QUIET] button is pressed once

again (cancel Quiet mode).

16. COMFORT SLEEP

Cooling mode

• The preset temperature will increase as

show on ECO operation (Item No. 9)

• Press the [COMFORT SLEEP] button to

choose the operating hours. Repeat

pressing to select the hours.

(1hr, 3hr, 5hr or 9hr)

• If the [COMFORT SLEEP] button is pressed

again means cancel comfort sleep mode.

Heating mode

• The preset temperature will drop down as

show on ECO operation (Item No. 9)

• Press the [COMFORT SLEEP] button to

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

• If the [COMFORT SLEEP] button is pressed

again means cancel comfort sleep mode.

Description

Quiet mode is the system which, control the revolving speed of indoor fan to work

constantly at lower than speed L. In addition, noise level of indoor unit is less than usual.

Remarks :

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

2. Quiet mode is appropriate to work with less cooling load and less heating load condition.

Because of the fan speed L- may cause not enough the cooling capacity or heating capacity.

The principles of comfort sleep mode are:

• Quietness for more comfortable. When

room temperature reach setting temperature

• Save energy by changing room temperature

automatically.

• The air condition can shut down by itself

automatically.

Remarks:

Comfort sleep mode will not operate in dry

mode and fan only mode.

17. One-Touch Comfort

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

Fan Operation

AUTO

0 12 25

AUTO/L L

Time after operation starts (min)

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

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

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

− 43 −

Operation condition for model to Europe market

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

the indoor unit operates as following.

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

conditioner was OFF.

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

) Target temperature is 75°F (24ºC).

4) Louver position is set as stored position of the operating mode.

5) Fan is controlled as followings.

FILE NO. SVM-10019

Item

18. Hi-POWER Mode

Operation flow and applicable data, etc.

([Hi-POWER] button on the remote controller

is pressed)

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

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

1. Automatic operation

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

2. Cooling operation

• The preset temperature drops 2.0°F (1ºC) (The value of the preset temperature on the remote controller does not change.)

The indoor unit's fan speed level increase 1 tap

3. Heating operation

• The preset temperature increases 3.5°F (2ºC) (The value of the preset temperature on the remote controller does not change.)

The indoor unit's fan speed level increase 1 tap

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

Description

∗ The Hi-POWER operation will be cancelled

when press [Hi-POWER] button again.

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

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

How to Turn Off FILTER Indicator

Press [RESET] button on the indoor unit.

NOTE :

If [RESET] button is pushed while the FILTER indicator is not lit, the indoor unit will start the automatic

operation.

− 44 −

FILE NO. SVM-10019

9-3. Auto Restart Function (Default setting from factory is ON).

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

This function is set to work from the factory.

The Auto Restart Function will not restart operation of the air conditioner in following case.

• The Auto Restart Function is setup to OFF.

• The power supply is shut down during the air conditioner is OFF.

• The power supply is shut down when timer operatio is set.

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

To cancel Auto Restart Function, proceed as follows.

1. The power supply to the unit must be ON ; The function will not set or reset if the power supply is OFF.

2. Press the [RESET] button located on the front panel of the indoor unit for more than 3 seconds.

3. After 3 seconds, the unit beeps three times.

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

Operation

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

Hi POWER FILTER PAP TIMER OPERATION

RESET

• When the system is operating

Operation

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

Motions

The unit is on standby.

↓

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

↓ After approx. three seconds,

The unit beeps three times and continues to operate.

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

Motions

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

↓

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

Hi POWER FILTER PAP TIMER OPERATION

RESET

↓ After approx. three seconds,

The unit beeps three times.

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

– 45 –

FILE NO. SVM-10019

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

To set Auto Restart Function, proceed as follows:

1. The power supply to the unit must be ON ; The function will not set or reset if the power supply is OFF.

2. Press the [RESET] button located on the front panel of the indoor unit for more than 3 seconds.

3. After 3 seconds, the unit beeps three times and the indicator blinks for 5 seconds.

• When the unit is standby (Not operating)

Operation

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

Hi POWER FILTER PAP TIMER OPERATION

RESET

• When the unit is in operation

Operation

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

Motions

The unit is on standby.

↓

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

↓ After approx. three seconds,

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

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

Motions

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

↓

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

↓ After approx. three seconds,

The unit beeps three times. The green indicator flashes

for 5 seconds.

Hi POWER FILTER PAP TIMER OPERATION

If the unit is required to operate at this time, press [RESET] button

RESET

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

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

9-3-3. Power Failure During Timer Operation

• If Timer operation is set and the power supply shut down accidentally, the previous Timer setting

will be cancelled.

• Daily-Timer operation will be not affected by power supply failure, if the remote controller is

located on the position which it can send the command signal to the indoor unit. It is because the remote controller will send signal every 30 minutes and Daily-Timer operation will be restore.

– 46 –

9-4. Remote controller and Its functions

9-4-1. Parts name of remote controller

Infrared signal emitter

Start/Stop button

Mode select button (MODE)

Temperature button (TEMP)

Fan speed button (FAN

Swing louver button (SWING)

Set louver button (FIX)

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

Sleep timer button (SLEEP)

Setup button (SET)

11 12

Clear button (CLR)

Memory and Preset button (PRESET)

One Touch button (ONE-TOUCH)

High power button (Hi-POWER)

Economy button (ECO)

Quiet button (QUIET)

Comfort sleep button (COMFORT SLEEP)

Filter reset button (FILTER)

Clock Reset button (CLOCK)

Check button (CHK)

PRESET

TEMP

ONE-TOUCH

QUIET

FIX Hi-POWER ECO

SWING

TIMER

SLEEP

FILTER

CHK

°C/°F

FILE NO. SVM-10019

FAN

MODE

COMFORT

SLEEP

CLR

OFF

SET

CLOCK

9-4-2. Operation of remote control

1. ONE-TOUCH

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

Press ONE-TOUCH : Start the operaton.

2. AUTOMATIC OPERATION

To automatically select cooling, heating, or fan only operation.

1. Press MODE : Select A.

2. Press TEMP : Set the desired temperature.

3. COOLING / HEATING / FAN ONLY OPERATION

1. Press MODE : Select Cool , Heat , or Fan only .

2. Press TEMP : Set the desired temperature. Cooling: Min. 62°F (17°C), Heating : Max, 86°F (30°C), Fan Only: No temperature indication

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

− 47 −

4. DRY OPERATION (COOLING ONLY)

For dehumidification, a moderate cooling performance is controlled automatically.

1. Press MODE : Select Dry .

2. Press TEMP : Set the desired temperature.

5. Hi-POWER OPERATION

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

Press HI-POWER : Start and stop the operation.

6. ECO OPERATION

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

Press ECO : Start and stop the operation.

Note: Cooling operation; the set temperature will increase automatically 1.8°F (1°C)/

hour for 2 hours (maximum 3.6°F (2°C) increase). For heating operation the set temperature will decrease.

7. TEMPORARY OPERATION

In case of the misplaced or discharged remote control

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

• Operation mode is set on AUTOMATIC operation, preset temperature is 75°F (24°C) and fan operation is automatic speed.

FILE NO. SVM-10019

8. TIMER OPERATION

Setting the ON Timer Setting the OFF Timer

Press ON : Set the desired ON timer.

Press

SET

: Set the timer. Press

CLR

: Cancel the on timer.

Press

Press : Cancel the OFF timer.

OFF

: Set the desired OFF timer.

SET

: Set the timer.

CLR

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

Setting Everyday Timer

Press

: Set the ON timer.

OFF

: Set the OFF timer.

Press

mark flashing.

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

SET

button during the ( or )

( or )

Note:

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

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

– 48 –

9. PRESET OPERATION

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

1. Select your preferred operation.

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

displays.

3. Press PRESET : Operate the preset operation.

10. AUTO RESTART OPERATION

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

Setting

1. AUTO RESTART is an initial setting from factory.

• Do not operate ON timer and OFF timer.

2. Press and hold the RESET button on the indoor unit for 3 seconds to cancel the

operation. (3 beep sound but OPERATION lamp does not blink)

11. QUIET OPERATION

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

FILE NO. SVM-10019

Press QUIET : Start and stop the operation.

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

cooling or heating due to low sound features.

12. COMFORT SLEEP OPERATION

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

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

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

1.8°F (1°C)/hour for 2 hours (maximum 3.6°F (2°C) increase). For heating operation, the set temperature will decrease.

13. SLEEP TIMER OPERATION

To start the sleep timer (OFF timer) operation

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

− 49 −

FILE NO. SVM-10019

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

[Display]

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

Transmission mark

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

Mode indicator

Indicates the current operation mode.

(A : Automatic control

: Dry, : Heat, : Fan only)

T emperature indicator

Indicates the temperature setting. [62°F to 86°F (17°C to 30°C)]

FAN speed indicator

Indicates the selected fan speed.

AUTO or five fan speed levels (

LOW , LOW+ , MED , MED+ , HIGH ) can be shown.

Indicates AUTO when the operating mode is either AUTO or

: Dr y.

indicates when the

: Cool,

TIMER and clock time indicator

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

The current time is always indicated except during TIMER operation.

Hi-POWER indicator

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

again to stop the operation.

(PRESET) indicator

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

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

Press another button to turn off the mark.

ECO indicator

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

to stop operation.

mark is shown when holding down the

POWER-SET

A, B change indicator remote controller

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

10 Comfort sleep

Indicates when comfort sleep is activaled. Press comfort sleep bu

tton to select function.

11 Quiet

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

12 One-Touch

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

13 Swing

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

– 50 –

10. INSTALLATION PROCEDURE

10-1. Installation Diagram of Indoor and Outdoor Units

FILE NO. SVM-10019

Air inlet grille

Filter

Batteries

Wireless remote control

(

Filter

24 in. (600 mm) or more only when unobstructed to the front and both sides.

)

Pan head wood screw

(

or more

Hook

2-9/16 in. (65 mm)

Front panel

Installation plate

(

)

For the rear left and left piping

Wall

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

Do not allow the drain hose to get slack.

Cut the piping hole sloped

Conduit

Shield pipe

slightly.

Make sure to run the drain hose sloped downward.

Remote control holder

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

Vinyl tape Apply after carrying out a drainage test.

)

(

)

(

Saddle

Extension drain hose (Not available, provided by installer)

(

)

Right

Rear right

Bottom right

Rear left

Left

Bottom left

Insulate the refrigerant pipes separately with insulation, not together.

5/16 in. (8 mm) thick heat resisting polyethylene foam

Before installing the wireless remote controller

• Loading Batteries

1. Remove the battery cover.

2. Insert 2 new batteries (AAA type)

−

following the (+) and (

) positions.

2 Wireless remote controller

A C

– 51 –

3 Batteries

10-2. Installation

10-1-2. Optional installation parts

FILE NO. SVM-10019

Part

Code

Parts name

Refrigerant piping Liquid side : ∅1/4 in. (∅ 6.35 mm)

Gas side : 3/8 in. (∅ 9.52 mm) Pipe insulating material

(polyethylene foam, 6 mm thick) Putty, PVC tapes

∅

4-1/4 in.

1-1/8 in. (28 mm)

(320 mm)

12-19/32 in.

(108 mm)

3-3/8 in.

(86 mm)

(

)

4-15/16 in.

(125 mm)

Air inlet

4 in.

(102 mm)

Q'ty

One

each

One

each

Air outlet

23-5/8 in. (600 mm)

3-17/32 in. (90 mm)

Fig. 10-2-1

Secure the outdoor unit with fixing bolts and nuts if the unit is likely to be exposed to a strong wind. Use ∅ 5/16 in. (∅ 8 mm) or ∅ 3/8 in. (∅ 10 mm) anchor bolts and nuts.

– 52 –

10-2-2. Accessory and installation parts

Part

No.

Part name (Q’ty)

Part

No.

Part name (Q’ty)

Part

No.

FILE NO. SVM-10019

Part name (Q’ty)

Installation plate x 1

Wireless remote control x 1

Battery x 2

Others

Name

Owner’s manual

Installation manual

Remote control holder x 1

Filter x 1

Mounting screw

∅5/32 x 1s (∅ 4mm x 25 ) x 6

Pan head wood screw

1/8 x 5/8 s (∅3.1mm x 16 ) x 2

∅

– 53 –

FILE NO. SVM-10019

10-2-3. Installation/Servicing T ools

Changes in the product and components

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

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

New tools for R410A

Gauge manifold

Charge hose

Electronic balance for refrigerant charging

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

Flare tool (clutch type)

Gauge for projection adjustment

Vacuum pump adapter

Applicable to R22 model

——

Changes

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

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

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

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

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

Used when flare is made by using conventional flare tool.

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

Gas leakage detector

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

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

Exclusive for HFC refrigerant.

– 54 –

10-3. Indoor Unit

10-3-1. Installation Location

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

• A location where there are no obstacle near the air inlet and outlet.

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

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

• The indoor unit shall be installed so that the top of the indoor unit is positioned at least 6.6 ft (2 m) in

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

• Location that will bear weight of the unit.

CAUTION

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

• The microprocessor in the indoor unit should

not be too close to RF noise sources.

(For details, see the owner's manual.)

Remote controller

• Should be placed where there are no obstacles, such as curtains, that may block the signal.

• Do not install the remote controller in a place

exposed to direct sunlight or close to a heating source, such as a stove.

• Keep the remote controller at least 3.3 ft (1 m) away

from the nearest TV set or stereo equipment. (This is necessary to prevent image disturbances or noise interference.)

• The location of the remote controller should be

determined as shown below.

FILE NO. SVM-10019

10-3-2. Cutting a Hole and Mounting the

mounting Plate

Cutting a hole

When installing the refrigerant pipes from the rear.

Pipe hole

∅

2-9/16 in. (65 mm)

The center of the pipe hole is above the arrow.

3-15/16 in.

(100 mm)

Fig. 10-3-2

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

NOTE :

• When drilling into a wall that contains a metal lath,

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

Mounting the mounting plate

Anchor bolt holes

Hook

), drill the pipe hole ∅ 2-9/16 in.

)

(

(Side view)

(Top view)

)

(

)

(

from ß oor

6.6 ft (2 m) or more

Indoor unit

Reception range

Remote controller

Reception range

Remote controller

Pipe hole

Indoor unit

Hook

Thread

Hook

Pipe hole

Mounting screw

eight

Mounting plate

Fig. 10-3-3

Fig. 10-3-1

– 55 –

When the installation plate is directly mounted on the wall

1. Securely fit the installation plate onto the wall by screws with the upper and lower catches, that hold the indoor unit, facing out.

2. To mount the installation plate on a concrete wall use anchor bolts. Drill the anchor bolt holes as illustrated in the above figure.

3. Install the installation plate horizontally and level.

FILE NO. SVM-10019

10-3-3. Electrical W ork

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

2. Prepare a power source for the exclusive use of the air conditioner.

NOTE :

• Wire type :

minimum AWG 14.

CAUTION

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

Installation plate (Keep horizontal direction.)

Anchor bolt

Projection

9/16 in. (15 mm)

or less

Fig. 10-3-4

3/16 in. (5 mm) dia. hole

CAUTION

• This appliance can be connected to a main circuit breaker in either of the following two ways.

1. Connection to fixed wiring:

A switch or circuit breaker which disconnects all poles and has a contact separa of at least 1/8 in. (3 mm) must be incorporated in the fixed wiring. An approved circuit breaker or switch must be used.

2. Connection with power supply plug:

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

NOTE :

• Perform wiring work being sure the wire length is long enough.

10-3-4. Wiring Connection

tion

7 Mounting screw Ø

5/32 in. x 1 in.

(∅4 mm x 25 mm)

Clip anchor (local parts)

Fig. 10-3-5

CAUTION

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

• In case of block, brick, concrete or similar type walls, make 3/16 in. (5 mm) dia. holes in the wall.

• Insert clip anchors for appropriate mounting screws

NOTE :

• Secure four corners and lower parts of the mounting plate with 4 to 6 mounting screws to install it.



How to connect the connecting cable

1. Open the air inlet grille upward.

2. Remove the screws securing the front panel.

3. Slightly open the lower part of the front panel, then pull the upper part of the front panel toward

you to remove it from the rear plate.

4. Insert the condit pipe (according to the local rule)

into the pipe hole on the wall.

5. Remove the conduit mount by loosening the fixing

screw. (Fig. 10-3-7)

. Fix conduit pipe to conduit mount with lock nut.

7. Pull out the connecting wire through the conduit pipe

and process the wire. (Fig. 10-3-8)

8. Take out the wire to the front and fix it to the terminal

block. Be careful not to make mis-wiring (Fig. 10-3-9)

9. Firmly tighten the terminal screws to prevent them

from loosening. Tightening torque: 0.9 lbf. ft (1.2 N·m).

After tightening, pull the wires lightly to confirm that they of not move.

10. Secure the connecting wire with the cord clamp.

11. Fix the conduit mount back to the body by fixing a screw.

12. Fix the front panel, terminal cover and air inlet grille on the indoor unit.

– 56 –

CAUTION

FILE NO. SVM-10019

10-3-5. Piping and Drain Hose Installation

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

• Check local electrical regulations for any specific wiring instructions or limitations.

Air inlet grille

Front panel

Fig. 10-3-6

Fixing screw

Lock nut

Inter connecting cable

Conduit mount

Conduit pipe

Fig. 10-3-7

Piping and drain hose forming

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

Rear right

Rear left

Bottom left

Changing

Left

drain hose

Bottom right

Die-cutting

Right

Front panel slit

Fig. 10-3-10

1. Die-cutting front panel slit

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

2. Changing drain hose

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

Piping preparation

Cord clamp

Terminal cover

Screw

Front panel

Fig. 10-3-8

4-5/16 in. (110 mm)

13/16 in. (20 mm)

S L2 L1

3/8 in. (10 mm)

3-5/32 in. (80 mm)

Fig. 10-3-9

NOTE :

• Use stranded wire only.

• Wire type : minimum AWG14

Terminal block

Ground line

Connecting cable

Ground line

How to remove the drain cap

Clip drain cap with needle-nose pliers, and pull out.

Fig. 10-3-11

How to remove the drain hose

The drain hose is secured in place by a screw. Remove the screw securing the drain hose, then pull

out the drain hose.

Screw

Drain hose

Fig. 10-3-12

– 57 –

FILE NO. SVM-10019

How to attach the drain cap

1. Insert hexagonal wrench 3/16 in. (4 mm).

3/16 in. (4 mm)

Fig. 10-3-13

2. Firmly insert drain cap.

No gap

Do not apply lubricating oil (refrigerant machine oil) when inserting the drain cap. If applied, deterioration and drain leakage of the drain

Insert a hexagon wrench 3/16 in (Ø4 mm)

plug may occur.

In case of bottom right or bottom left piping

• After making slits on the front panel with a knife or similar tool, cut them out with a pair of nippers or an equivalent tool.

Slit

Fig. 10-3-16

Left-hand connection with piping

Bend the connecting pipes so that they are positioned within 1-5/8 in. (43 mm) above the wall surface.

If the connecting pipes are positioned more than 1-5/8 in (43 mm) above the wall surface, the indoor unit may be unstable.

When bending the connecting pipe, make sure to use a spring bender to avoid crushing the pipe.

Refer to the table below for the bending radius of each connection pipe.

Fig. 10-3-14

How to attach the drain hose

Always use the original scre w that secured the drain hose to the unit. If using a different screw may cause water to leak.

Insert the drain hose firmly until the connector contacts with the insulation, then secure it in place using the original screw.

CAUTION

Securely insert the drain hose and drain cap; otherwise, water may leak.

In case of right or left piping

• After making slits on the front panel with a knife or similar tool, cut them out with a pair of nippers or an equivalent tool.

Outer diameter

∅1/4 in. (6.35 mm) ∅3/8 in. (9.52 mm) ∅1/2 in. (12.7 mm)

Bending radius

1-3/16 in. (30 mm)

1-9/16 in. (40 mm)

1-31/32 in. (50 mm)

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

(T o the forefront of ß are)

10-5/8 in.

1-5/8 in.

(270 mm)

9-1/16 in. (230 mm)

(43 mm)

Gas side

Liquid side

Outward form of indoor unit

R 1-3/16 in. (R 30 mm) (Use polisin (polyethylene) core or the like for bending pipe.)

Use the handle of screwdriver, etc.

Slit

Fig. 10-3-15

Fig. 10-3-17

NOTE :

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

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

– 58 –

CAUTION

(50 mm) or more

Do not rise the drain hose.

Do not form the drain hose into the waved shape.

Do not put the drain hose end into water.

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

2 in.

• Bind the auxiliary pipes (two) and connecting cable with facing tape tightly.

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

Indoor unit

Auxiliary pipes

Installation plate

Fig. 10-3-18

• Carefully arrange the pipes so that none of the pipes stick out of the rear plate of the indoor unit.

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

• Since condensation can result in machine performance trouble, be sure to insulate both connecting pipes. (Use polyethylene foam as insulating material.)

• When bending a pipe, be careful not to crush it.

Connecting cable

FILE NO. SVM-10019

10-3-7. Drainage

1. Run the drain hose at a downward sloped angle.

NOTE :

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

Fig. 10-3-21

2. Put water in the drain pan and make sure that the

water is being drained outside.

3. When connecting extension drain hose, insulate

the connection part of extension drain hose with shield pipe.

Shield pipe

10-3-6. Indoor Unit Installation

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

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

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

Hook

• For detaching the indoor unit from the installation

plate pull the indoor unit toward you while pushing the bottom up at the specified places.

Hook here

Installation plate

Fig. 10-3-19

Push (unhook)

Drain hose

Inside the room

Extension drain hose

Fig. 10-3-22

CAUTION

Install the drain pipe for proper drainage.

Improper drainage can result in water dripping inside the room.

This air conditioner has been designed to drain water collected from condensation which forms on the back of the indoor unit, to the drain pan.

Therefore, do not locate the power cord and other parts at a high place than the drain guide.

Wall

Drain guide

PushPush

Fig. 10-3-20

– 59 –

Space for pipes

Fig. 10-3-23

FILE NO. SVM-10019

10-4. Outdoor Unit

10-4-1. Installation Location

• A location which provides enough space around the

outdoor unit as shown in the diagram.

• A location which can bear the weight of the outdoor

unit and does not allow an increase in noise level and vibration.

• A location where the operation noise and discharged

air do not disturb neighbors.

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

• A location free of combustible gases.

• A location which does not block a passage.

• A location where the drain water does not cause any

problems.

• Depending on snow level, use a field fabricated ice

or snow stand.

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

position, be sure to secure its feet.

Precautions for adding refrigerant

• Use a scale having a precision with at least 10 g

per index line when adding the refrigerant. Do not use a bathroom scale or similar instrument.

• Use liquid refrigerant when refilling the refrigerant.

Since the refrigerant is in liquid form, it can fill quickly.

Therefore, perform the filling operation carefully and insert the refrigerant gradually.

CAUTION

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

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

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

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

Do not install the unit in such places.

• A place full of machine oil.

• A saline-place such as the coast.

• A place full of sulfide gas.

• A place where high-frequency waves are

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

Strong wind

Fig. 10-4-1

– 60 –

FILE NO. SVM-10019

10-4-2. Refrigerant Piping Connection

Flaring

1. Make sure you have enough pipe to reach indoor unit.

2. Cut the pipe with a pipe cutter.

90°

Obliquity Roughness WarpWarp

Fig. 10-4-2

3. Insert a flare nut into the pipe and flare the pipe.

Tightening connection

Align the centers of the connecting pipes and tighten the flare nut as far as possible with your fingers. Then tighten the nut with a two wrenches as show below.

Half union Flare nut

Externally threaded side

Use a wrench to secure. Use a torque wrench to tighten.

Fig. 10-4-3

CAUTION

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

Outer dia. of copper pipe

Ø1/4 in. (Ø6.35 mm) 10 to 13 lbf.ft (14 to 18 N·m) Ø3/8 in. (Ø9.52 mm) 24 to 31 lbf.ft (33 to 42 N·m) Ø1/2 in. (Ø12.70 mm) 37 to 46 lbf.ft (50 to 62 N·m)

• Tightening torque for connection of flare pipe

The pressure of R410A is higher than R22. (Approx. 1.6 times.) Therefore securely tighten the flare pipes which connect the outdoor unit and the indoor unit with the specified tightening torque using a torque wrench.

Flare at indoor unit side

Flare at outdoor unit side

Internally threaded side

Tightening torque

10-4-2. Wiring Connection

NOTE

All wiring and connections must comply with NEC, CEC, local codes.

• Connect all wires to the correct terminal on the

wiring terminal blocks.

• Make sure that all connectors are secure.

• Size connectors per the ratings listed in the

system requirement section.

• System interconnections should be minimum

AWG14.

1. MOUNT THE OUTDOOR UNIT POWER DISCONNECT.

2. ROW POWER WIRING FROM MAIN BOX TO DISCONNECT PER NEC AND LOCAL CODES.

3. Remove the valve cover and the cord clamp from the outdoor unit.

4. Fix conduit connector to conduit plate by lock nut and secure it tightly. Connect the power supply and connecting cables to the terminal block as shown in figure and secure it tightly with screws.

5. You should not have extra cables.

6. Secure the power cord and the connceting cable with the cord clamp.

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

8. RUN PIPING AND INTERCONNECTING CABLE TO THE INDOOR UNIT.

10-4-3. Electrical Work

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death. The unit cabinet must have an uninterrupted or unbroken ground to minimize personal injury if an electrical fault should occur. The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes. Before performing service or maintenance, be sure main power switch is turned OFF.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation. Unit failure as a result, or operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation could void any applicable warranty.

– 61 –

FILE NO. SVM-10019

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

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

NOTE : Power supply cord

• Wire type : minimum AWG14

Stripping length of the Power supply cord and Inter connecting cable

Terminal block

Inter connecting cable

Fig. 10-4-4

Power supply cord

Unit : inch (mm)

CAUTION

•

Wrong wiring connection may cause some

electrical parts burn out.

•

Be sure to comply with LOCAL CODES.

•

Every wire must be connected firmly.

•

If incorrect or incomplete wiring is carried out,

it will cause an ignition or smoke.

NOTE : Inter connecting cable

• Wire type : minimum AWG14

10-5. EVACUATING

10-5-1. Evacuating

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

Vacuuming

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

Using a vacuum pump

3/8 (10)

1-3/16 (30)

Connecting cable Power cord

2-12/16 (70)

Ground line

3/8 (10)

1-3/16 (30)

Fig. 10-4-5

Lock nut

Valve cover

Fig. 10-4-6

3/8 (10)

1-9/16 (40)

Ground line

Conduit plate

Connector

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

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

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

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

4. Operate the vacuum pump to start evacuating. Perform evacuating for about 15 minutes if the piping length is 66 feet (20 m). (15 minutes for 66 feet) (assuming a pump capacity of 27 liters per minute) Then confirm that the compound pressure gauge reading is -101 kPa (-76 cmHg).

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

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

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

– 62 –

FILE NO. SVM-10019

Pressure gauge

Manifold valve

Handle Hi (Keep full closed)

Charge hose (For R410A only)

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

Vacuum

pump

Packed valve at liquid side

Service port (Valve core (Setting pin))

Compound pressure gauge

–101 kPa

(–76 cmHg)

Handle Lo

Charge hose (For R410A only)

Connecting pipe

Packed valve at gas side

Fig. 10-5-1

CAUTION

•

KEEP IMPORTANT 5 POINTS FOR PIPING

WORK.

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

•

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equip ment damage or improper operation.

Never use the system compressor as a vacuum pump.

Hexagon wrench is required.

in.

3/16

Fig. 10-5-2

10-6. SYSTEM REQUIREMENTS

10-6-1. Piping (Field supplied)

• Minimum refrigerant line length between the outdoor

unit and indoor unit is

6.6ft. (2m).

•

Maximum pipe lengths

Allowable Pipe length T

(ft (m))

66 (20) 33 (10)

Height difference

(Indoor − Outdoor H)

(ft (m))

10-5-2. Packed valve handling precautions

• Open the valve stem until it touches the stopper.

Once it is in contact with the stopper, refrain form

applying any more force than is necessary.

• Securely tighten the valve stem cap with torque

in the following table:

Gas side Ø1/2 in. (Ø12.70 mm)

Gas side Ø3/8 in. (Ø9.52 mm)

Liquid side Ø1/4 in. (Ø6.35 mm)

Service port

37 to 46 lbf.ft (50 to 62 N·m)

24 to 31 lbf.ft (33 to 42 N·m)

10 to 13 lbf.ft (14 to 18 N·m)

Refrigerant pipe sizes

Liquid side Gas side

Outer

Diameter

In. (mm)

Ø1/4 (6.35) 0.03 (0.8) Ø3/8 (9.52) Ø1/2 (12.70) 0.03 (0.8)

Thickness

In. (mm)

Outer diameter

In. (mm)

(09, 12LKV) (15, 17, 22LKV)

Insulation

Both lines need to be insulated. Use a minimum 5/16 in (8mm) wall thickness.

– 63 –

Thickness

In. (mm)

FILE NO. SVM-10019

Refrigerant charge

Unit : ft (mm)

Refrigerant charge

Length of refrigerant Pipe

connected to Indoor/

outdoor unit

6.6-50

(2-15m)

50-66

(15-20m)

Additional refrigerant

None

Add 0.22oz/ft (20g/m) of

Refrigerant for piping that exceeds

50ft (15m) up to 66ft (20m)

* Caution during addition of refrigerant Max. amount of additional refrigerant is 0.22 lbs (100g). Charge the refrigerant accurately. Overcharging may cause serious trouble with the compressor. * Minimum refrigerant pipe is 6.6ft (2m). Using pipe shorter than that may cause a malfunction of the compressor or other devices.

10-6-2. Power supply Connection and Connecting

Cable

10-7. OTHERS

10-7-1. Gas Leak Test

Valve cover

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

Check places for the outdoor unit.

Fig. 10-7-1

10-7-2. Test Operation

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

Check places for ß are nut connection (indoor unit)

• The power supply shall be connected to the outdoor unit

by 3 wires.

• The connecting cable between the indoor unit and outdoor

unit is 4 wires. This cable provides the power for the indoor unit and the communication signal between the outdoor unit and indoor unit.

• Consult local building codes, NEC (National Electrical Code)

or CEC (Canadian Electrical Code) for special requirements.

• The following are the electrical requirements.

Item

Max. Current. 8.5A 13.0A

Fuse / Circuit Breaker of main

power supply

Power supply cord

(Not provide)

Product

Model

FCU

RAS-09LKV-UL

CDU

RAS-09LAV-UL

Connect to

FCU/CDU

No. of Core

Size AWG14

15A

CDU

3 (L1,

RAS-12LKV-UL

RAS-12LAV-UL

L2, )

Hi POWER FILTER PAP TIMER OPERATION

RESET

RESET button

Fig. 10-7-2

10-7-3. Auto Restart Setting

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

Information

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

10-7-4. How to cancel the Auto Restart

Inter connecting

cable between

FCU & CDU

(Not provide)

No. of Core

Size

4 (L1,

AWG14

L2, S, )

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

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

· Do not operate ON timer and OFF timer3

Note : Default setting of auto restart operation is OK

– 64 –

FILE NO. SVM-10019

10-7-5. Remote Controller A or B Selection

Setting

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

Remote controller A or B selection

• When two indoor units are installed in the same room or adjacent two rooms, if operating a unit, 2 units may receive the remote controller signal simultaneously and operate. In this case, the operation can be preserved by setting either one indoor unit or remote controller to B setting. (Both are set to A setting in factory shipment.)

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

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

Remote controller A- B selection

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

Temperature unit °F - °C selection

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

2. Press SLEEP during pushing CHK •

Note :

1. Repeat above step to reset Remote Controller to

be °F.

2. Operation mode and temperature set will reset to

initial setting after change the temperature unit.

3. Default setting of Remote Control from factory

is °F.

Remote controller B Setup.

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

2. Point the remote controller at the indoor unit.

3. Push and hold CHK button on the remote controller by the tip of the pencil. “00” will be shown on the display.

4. Push MODE during pushing CHK, “B” will show on the display and “00” will disappear and the air conditioner will turn OFF. The remote controller B is memorized.

Note :

1. Repeat above step to reset Remote Controller to be A.

2. Remote controller A have not “A” display.

3. Detault setting of remote controller from factory is A.

“B” Display

“00” Display

PRESET FAN

Fig. 10-5-1

– 65 –

FILE NO. SVM-10019

11. HOW TO DIAGNOSE THE TROUBLE

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

Table 11-1

No.

Troubleshooting Procedure

First Confirmation

Primary Judgment

Judgment by Flashing LED of Indoor Unit

Self-Diagnosis by Remote Controller

Judgment of Trouble by Every Symptom

Page

No.

Troubleshooting Procedure

How to Check Simply the Main Parts

Troubleshooting

How to Diagnose Trouble in Outdoor Unit

How to Check Simply the Main Parts

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

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

CAUTION: HIGH VOLTAGEN

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

P.C. board by hand.

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

(3DV: 3-shunt Discrete Vector control)

K The control circuitry has an uninsulated construction.

Page

Shared potential

MCU

Driver

Amplifier

Fig. 11-1

Amplifier

IGBT × 6

FET × 6

Compressor

Fan motor

– 66 –

FILE NO. SVM-10019

CAUTION

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

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

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

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

Fig. 11-2

Do NOT lay the circuit board assembly flat.

K Precautions when inspecting the control section of the outdoor unit

NOTE :

A large-capacity electrolytic capacitor is used in the outdoor unit controller (inverter). Therefore, if the power supply is turned off, charge (charging voltage DC After turning off the power source, if touching the charging section before discharging, an electrical shock may be caused. Discharge the electrolytic capacitor completely by using soldering iron, etc.

< Discharging method >

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

2. As shown below, connect the discharge resistance (approx. 100Ω40W) or plug of the soldering iron to

voltage between + – terminals of the C14 (“CAUTION HIGH VOLTAGE” is indicated.) electrolytic capacitor (500µF/400V

) on P.C. board, and then perform discharging.

265

to 360V) remains and discharging takes a lot of time.

Discharging position (Discharging period 10 seconds or more)

Plug of soldering iron

Inverter cover

P. C. board (Soldered surface)

– 67 –

Fig. 11-3

FILE NO. SVM-10019

11-1. First Confirmation

11-1-1. Confirmation of Power Supply

Confirm that the power breaker operates (ON) normally.

11-1-2. Confirmation of Power Voltag e

Confirm that power voltage is AC 208−230 ± 10%.

If power voltage is not in this range, the unit may not operate normally.

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

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

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

taining of air conditioner.

Table 11-1-1

No.

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

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

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

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

In AUTO mode, the operation mode is changed.

Operation of air conditioner

Description

The OPERATION lamp of the indoor unit flashes when

power source is turned on. If [ ] button is

operated once, flashing stops. (Flashes also in power failure)

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

The air flow indication is fixed to [AUTO].

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

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

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

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

– 68 –

FILE NO. SVM-10019

11-2. Primary Judgment

To diagnose the troubles, use the following methods.

1) Judgment by flashing LED of indoor unit

2) Self-diagnosis by service check remote controller

3) Judgment of trouble by every symptom

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

11-3. Judgment by Flashing LED of Indoor Unit

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

Table 11-3-1

Indoor indication

lamp flashes.

Which lamp

does flash?

Item

Check

code

Block display Description for self-diagnosis

OPERATION (Green) Flashing display (1 Hz)

OPERATION (Green) Flashing display (5 Hz)

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

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

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

• When turn ON power supply.

• Power supply ON after failure or OFF.

• This flashing display is not air conditioner failure.

Protective circuit operation for indoor P.C. board

Protective circuit operation for connecting cable and serial signal system

Protective circuit operation for outdoor P.C. board

Protective circuit operation for others (including compressor)

NOTES :

1. Some check code will flash display of the indoor unit, when the air conditioner operates with some limitation.

2. Some check code will flash display of the indoor unit and stop operation of the air conditioner.

3. When item B and C or item B and apart of item E occur concurrently, priority is given to the block of item B.

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

– 69 –

FILE NO. SVM-10019

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

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

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

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

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

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

PR E S E T

ON E- TOU CH

QU IE T

S WIN G

TI ME R

SL E E P

C HK

°C/° F

TOSHIBA

FA N

TE MP

TEMP

MOD E

C OMF OR T

S LE E P

FI X Hi- PO WE R E C O

OF F

FI LT E R

C LO CK

Press [ON ] or [OFF ] button

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

• • •

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

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

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

CL R

SE T

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

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

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

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

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

Press [CLR] button. After service finish for clear

service code in memory.

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

control.

Press [ ] button to release the service mode.

• The display of the remote controller returns to as it

was before service mode was engaged.

Fig. 11-4-1

– 70 –

FILE NO. SVM-10019

11-4-2 Caution at Servicing

1. After using the service mode of remote controller finished, press the [ ] button to reset the remote controller to

normal function.

2. After finished the diagnosis by the remote controller, turn OFF power supply and turn its ON again to reset the air

conditioner to normal operation. However, the check codes are not deleted from memory of the microcomputer.

3. After servicing finished, press [CLR] button of remote controller under service mode status to send code "7F" to the

indoor unit. The check code stored in memory is cleared.

Table 11-4-1

Block distinction Operation of diagnosis function

Check

code

Block

Indoor P.C. TA sensor ; The room Operation Flashes when 1. Check the sensor TA and connection.

board. temperature sensor is continues. error is detected. 2. In case of the sensor and its

Check

code

Cause of operation

short-Circuit or disconnection. connection is normal, check the

Air

conditioner

status

Display flashing

error

P.C. board.

Action and Judgment

TC sensor ; The heat Operation Flashes when 1. Check the sensor TC and connection.

exchanger temperature continues. error is detected. 2. In case of the sensor and its

sensor of the indoor unit connection is normal, check the

is out of place, disconnection, P.C. board.

short-circuit or migration.

Fan motor of the indoor unit All OFF Flashes when 1. Check the fan motor and connection.

is failure, lock-rotor, short- error is detected. 2. In case of the motor and its

circuit, disconnection, etc. connection is normal, check the

Or its circuit on P.C. board P.C. board.

has problem.

Other trouble on the indoor Depend on Depend on Replace P.C. board.

P.C. board. cause of cause of

failure. failure.

– 71 –

FILE NO. SVM-10019

Block distinction Operation of diagnosis function

Check

code

Block

Serial signal 1) Defective wiring of the Indoor unit Flashes when 1) to 3) The outdoor unit never and connecting connecting cable or operates error is detected. operate. cable. miss-wiring. continue. Flashing stop Check connecting cable and correct

Check

code

Cause of operation

2) Operation signal has not Outdoor unit and outdoor unit if defective wiring. send from the indoor unit stop. start to operate Check 25A fuse of inverter P.C. board. when operation start. when the return Check 3.15A fuse of inverter

3) Outdoor unit has not signal from the P.C. board. send return signal to the outdoor unit is Check operation signal of the indoor indoor unit when operation normal. unit by using diode. Measure voltage started. at terminal block of the indoor unit

4) Return signal from the between No.2 and No.3 (or L2 and S) outdoor unit is stop during If signal is varied 15-60V continuously, operation. replace inverter P.C. board.

Some protector If signal is not varied, replace indoor (hardware, if exist) of the P.C. board. outdoor unit open 4) The outdoor unit abnormal stop at circuit of signal. some time. Signal circuit of indoor If the other check codes are found P.C. board or outdoor concurrently, check them together. P.C. board is failure Check protector (hardware) such in some period. as Hi-Pressure switch,

Note : Operation signal of the indoor unit shall be measured in the sending period as

picture below.

Sending signal of the indoor unit when have not return

VDC

signal from the outdoor unit.

3 minutes Delay, start counting from power supply ON or remote OFF.

3 minutes stop

Voltage variation stop or have not voltage output.

conditioner

***

Air

status

Display flashing

error

Thermal-Relay, etc. Check refrigerant amount or any possibility case which may caused high temperature or high pressure. Check operation signal of the indoor unit by using diode. Measure voltage at terminal block of the indoor unit between No.2 and No.3 (or L2 and S)

If signal is varied 15-60V continuously, replace inverter P.C. board. If signal is not varied, replace indoor P.C. board.

Action and Judgment

Measured signal voltage by apply diode

34 78

Time (Min)

* Signal send only 1 minute and stop. Because of return signal from outdoor unit has not received. ** Signal resend again after 3 minutes stop. And the signal will send continuously. *** 1 minute after resending, the indoor unit display flashes error.

– 74 –

Block distinction Operation of diagnosis function

Check

code

Block

Outdoor P.C. Current on inverter circuit All OFF Flashes after 1. Remove connecting lead wire of the

board is over limit in short time. error is detected compressor, and operate again.

Check

code

Cause of operation

Inverter P.C. board is 4 times*. 2. If outdoor fan does not operate or failure, IGBT shortage, etc. operate but stop after some period,

Compressor current is replace the inverter P.C. board.

higher than limitation, 3. If outdoor fan operates normally,

lock rotor, etc. measure 3-Phase output of inverter

Compressor position-detect All OFF Flashes after 1. Remove connecting lead wire of the

circuit error or short-circuit error is detected compressor, and operate again.

between winding of 4 times*. 2. If outdoor fan does not operate or

compressor. operation but stop after some period,

Air

conditioner

status

Display flashing

error

FILE NO. SVM-10019

Action and Judgment

P.C. board (150-270VAC) at the

connecting lead wire of compressor.

4. If 3-Phase output is abnormal, replace

inverter P.C.Board.

5. If 3-Phase output is normal, replace

compressor. (lock rotor, etc.)

replace the inverter P.C. board.

3. If outdoor fan operates normally,

measure resistance of compressor

winding. If circuit is shortage, replace

the compressor.

Current-detect circuit of All OFF Flashes after Even if trying to operate again, all

inverter P.C. board error. error is detected operations stop, replace inverter

4 times*. P.C. board.

TE sensor ; The heat All OFF Flashes after 1. Check sensors TE, TS and connection.

exchanger temperature error is detected 2. In case of the sensors and its

sensor of the outdoor unit 4 times*. connection is normal, check the

either TS sensor ; Suction inverter P.C. board.

pipe temperature sensor,

out of place, disconnection

or shortage.

TD sensor ; Discharge pipe All OFF Flashes after 1. Check sensors TD and connection.

temperature sensor is error is detected 2. In case of the sensor and its

disconnection or shortage. 4 times*. connection is normal, check the

inverter P.C. board.

Outdoor fan failure or its All OFF Flashes after 1. Check the motor, measure winding

drive-circuit on the inverter error is detected resistance, shortage or lock rotor.

P.C. board failure. 4 times*. 2. Check the inverter P.C. board.

TO sensor ; The outdoor Operation Record error 1. Check sensors TO and connection.

temperature sensor is continues. after detected 2. In case of the sensor and its

disconnection or shortage. 4 times*. connection is normal, check the

But does not inverter P.C. board.

flash display.

– 73 –

Block distinction Operation of diagnosis function

Check

code

Block

Check

code

Cause of operation

Compressor drive output error. All OFF Flashes after 1. Check installation conditions such as

(Relation of voltage, current error is detected packed valve opening, refrigerant

and frequency is abnormal) 4 times*. amount and power supply (rate +

Overloading operation of both of operation and non operation

compressor caused by condition).

over-charge refrigerant, 2. Check P.M.V. by measure the

P.M.V. failure, etc. resistance of the coil and confirm its

Compressor failure (High operation (sound of initial

current). operation, etc.)

Air

conditioner

status

Display flashing

error

FILE NO. SVM-10019

Action and Judgment

10%,

3. Observe any possibility cause which

may affect operation load of

compressor.

4. Operate again. If compressor

operation is failure when 20 seconds

passed (count time from operation

starting of compressor), replace

compressor.

* 4 times ; When first error is detected, error is count as 1 time, then once operation is stop and re-started.

After re-starting operation within 6 minutes, if same error is detected, error count is add (count become 2 times)

When error count comes 4 times, record error to check code. But after re-starting operation, if no error is

detected and air conditioner can operate more than 6 minutes, error count is cleared.

The others Return signal of the outdoor Indoor unit Flashes when 1. Check power supply (Rate +

(including unit has been sent when operates error is detected. 2. If the air conditioner repeat operates

compressor) operation start. But after continue. Flashing stop and stop with interval of approx. 10

that, signal is stop some time. Outdoor unit and outdoor unit to 40 minutes.

Instantaneous power stop. start to operate Check protector (hardware) such

failure. when the return as Hi-Pressure switch,

Some protector signal from the Thermal-Relay, etc. (hardware, if exist) of the outdoor unit is Check refrigerant amount, packed

outdoor unit open normal. valve opening and any possibility

circuit of signal. cause which may affect high

Signal circuit of indoor temperature or high pressure.

P.C. board or outdoor 3. Check operation signal of the indoor

P.C. board is failure unit by using diode. Measure voltage

in some period. at terminal block of the indoor unit

between No.2 and No.3 or L2 and S

If signal is varied 15-60V continuously,

replace inverter P.C. board.

If signal is not varied, replace indoor

P.C. board.

10%)

– 74 –

Block distinction Operation of diagnosis function

Check

code

Block

Check

code

Cause of operation

Compressor does not rotate. All OFF Flashes after 1. Remove connecting lead wire of the

Because of missed wiring, error is detected compressor, and operate again.

missed phase or shortage. 4 times*. 2. If outdoor fan does not operate or

Air

conditioner

status

Display

flashing error

FILE NO. SVM-10019

Action and Judgment

operation but stop after some period,

replace the inverter P.C. board.

3. If outdoor fan operates normally,

measure 3-Phase output of inverter

P.C. board (150-270VAC) at the

connecting lead wire of compressor.

4. If 3-Phase output is abnormal, replace

inverter P.C.Board.

5. If 3-Phase output is normal, measure

resistance of compressor winding.

6. If winding is shortage, replace the

compressor.

Discharge temperature All OFF Flashes after 1. Check sensors TD.

exceeded 117

Compressor is high current All OFF Flashes after 1. Check installation conditions such as

though operation Hz is error is detected packed valve opening, refrigerant

decreased to minimum limit. 4 times*. amount and power supply (rate +

Installation problem. both of operation and non operation

Instantaneous power condition).

failure. 2. Check P.M.V. by measure the

Refrigeration cycle resistance of the coil and confirm its

problem. operation (sound of initial

Compressor break down. operation, etc.)

error is detected 2. Check refrigerant amount.

4 times*. 3. Check P.M.V. by measure the

resistance of the coil and confirm its

operation (sound of initial

operation, etc.)

4. Observe any possibility cause which

may affect high temperature of

compressor.

10%,

3. Observe any possibility cause which

may affect high current of compressor.

4. If 1, 2 and 3 are normal, replace

compressor.

* 4 times ; When first error is detected, error is count as 1 time, then once operation is stop and re-started.

After re-starting operation within 6 minutes, if same error is detected, error count is add (count become 2 times)

When error count comes 4 times, record error to check code. But after re-starting operation, if no error is

detected and air conditioner can operate more than 6 minutes, error count is cleared.

– 75 –

11-5. Judgement of Trouble by Every Symptom

11-5-1. Indoor unit (Including remote controller) (1) Indoor unit is not operated.

(RAS-09LKV-UL)

FILE NO. SVM-10019

supply once, and 5

second later, turn it

Is OPERATION

Is fuse (F01)

of indoor control

board blown?

Turn off power

on again.

lamp blinking?

YES

Is it possible to

turn on

Indoor unit by

pressing [ ] button on remote

control?

YES

(DB01,C27,T01

are defective.

Par ts

and IC02)

Does

transmission

mark on remote control flash normally,

and is its signal

transmitted

properly?

YES

Remote control is

defective.

Refer to (5)

"Troubleshooting for

Remote Control.

Operation

Check item

Conceivable principle

cause

Measure

Item by symptoms

Unit operates

normally.

Is voltage

(DC 12V or 5V)

indicated on

indoor

control board

normal?

Connection between

YES

main PC Board

and display PCB are

connect properly ?

Reconnect housing

Does

YES

Microcomputer

is defective.

Replace main

P.C. board.

– 76 –

( RAS-12LKV-UL)

FILE NO. SVM-10019

Operation

Check Item

Considerable principle cause

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

Is OPERATION indicator flashing?

Is it possible to turn on

on remote controller?

Unit operates normally.

Is fuse (F01)

of indoor control

board blown?

Is voltage

(DC5V, 12V and 15V)

indicated on rear of

indoor control

board normal?

YES

A/C by pushing

[ ] button

YES YES

YES

Does transmission mark

NO NO

on remote controller flash

normally,and is its signal

Point remote to digital

camera. Can see infrared

when push [ ] button?

Does connection

between PC Board

and reciver PCB

are connect properly?

Reconnect housing

transmitted properly?

ray at sending LED

on camera monitor

YES

motor connector

between CN10 1 –

YES

3 short-circuit?

YES

Microcomputer

Does fan

is defective.

Measures

Item by symptoms

Remote controller is defective.

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

Replace remote control

YES

Replace main P.C. board

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

Turn on power supply.

Does OPERATION indicator flash?

Is wired correctly to white and

black lead wires of terminal block?

YES

– 77 –

Replace fan motor.

Correct wiring.

To item of “Indoor unit is not operated”.

FILE NO. SVM-10019

(3) Only the indoor motor fan does not operate

1. Is it possible to detect the power supply voltage (AC208–230V) between

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

( RAS-09LKV-UL)

Shut off the

power supply once.

Turn the power supply.

and

on the terminal block?

Does the fan stop in

no operating status?

YES

Does an operation

LED 1 Hz blink?

YES

Start the operation

with low fan setting

in cool operation.

Does the fan rotate?

YES

Does the fan motor

operate smoothly?

YES

Change the setting of

cooling to high fan.

Control P.C. board is defective.

Check connecting

cable or power

supply cord complely?

YES

Check 5V at

display unit?

YES

Does AC 115 V

or higher voltage apply

to between red and black

lead of fan motor?

YES

Shut off the power supply.

Does the cross flow fan rotate normally?

YES

Replace the P.C. board.

Reconecting the

NO NO

bearing of cross

interconnetion cable

and terminal

block.

Check 5V at

Main P.C. Board?

YES

Change Display unit

Replace

flow fan

Does the fan speed

become higher?

YES

Normal

Turn on the power supply.

Operation

stops

Is the rotation signal (DC+5 V output between k (gray lead wire)

and l (brown lead wire) of the motor

connector (CN33) when rotating the

cross flow fan by hand in no operating

status? (1 pulse/one turn)

YES

Replace the control

P.C. board.



0 V)

– 78 –

Replace the fan motor.

( RAS-12LKV-UL )

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

FILE NO. SVM-10019

Does fan motor

continue to operate?

Does check

operation LED flash?

YES

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

Does indoor

fan operate?

YES

Is it possible to detect

DC 1V or more between

+ and

motor connector (CN

– of

YES

Does check connecting

cable or power supply

cord complely?

YES

Does check

5V at display unit?

YES

Is it possible to detect

DC 294–325V between

+ and 3 – of motor

connector (CN31).

YES

(Motor connection condition)

Is it possible to detect DC 15V

between 4 + and 3 – of

motor connector (CN31).

YES

Reconnecting the in terconnection cable and terminal block

Does check 5V

at main P.C board?

Replace

display unit

Turn off indoor unit and remove

connector from motor.

Then push [ ] button

on remote controller to stop

flashing lamp on indoor unit.

YES

Peplace indoor fan motor.

Change airflow level to “HIGH”.

Start to operate the

indoor unit in except

heating operation.

At this time, is it possible to

detect DC 1V or more between

5 + and 3 – of motor

connector (CN31)?

YES

Is it possible to detect

DC 15V between 4 +

and 3 – of motor

connector (CN31).

Turn off indoor unit and

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

Start to operate the

indoor unit in except

heating operation.

At this time, is it possible

to detect DC 1V or more

between

of motor connector (CN31)?

within 15 seconds after

(Check this condition

starting unit.)

YES

+ and 3 –

YES

Peplace main P.C. board.

– 79 –

FILE NO. SVM-10019

Is it possible to

change airflow level

to “HIGH”?

YES

Fan motor operates normally.

Is it possible to

rotate cross-flow fan by

hand properly?

YES

Turn off indoor unit

and rotate cross-flow

fan by hand when the

unit is on standby.

At this time, is it possible to

detect DC 1V or more

between 5 + and 3 –

of motor connector

(CN

31).

YES

Does check display

on remote show high?

YES

Change the new PC

board. Does fan speed

change?

YES

Does check cross-flow

fan bearing normal

condition?

YES

Replace remote

Replace motor

Replace bearing of cross-flow fan.

Replace indoor

fan motor.

Peplace main

P.C. board.

– 80 –

FILE NO. SVM-10019

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

(For AC fan motor in RAS-09LKV-UL)

<Cause>

AC motor is only coil and Hall-IC inside packing all driving control or circuit locate on a main PC Board.

1. Turn on breaker.

2. After Fan motor operate, off A/C by remote controller.

3. Turn off breaker for a while, then turn it ON.

3.1. If fan motor not operate, it means an unit in Auto-restart operation. (see more detail in P. 44-45)

3.2. If Fan motor still operate, means P.C Board mal-function. Replace P.C Board.

(For DC fan motor in RAS-12LKV-UL) <Cause>

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

on power supply.

1. Turn on breaker.

2. After Fan motor operate, off A/C by remote controller.

3. Turn off breaker for a while, then turn it ON.

3.1. If fan motor not operate, it means an unit in Auto-restart operation. (see more detail in P. 44-45)

3.2. If Fan motor still operate, follow the below.

3.2.1. Remove the grille.

3.2.2. Remove the cover terminal by release one screw.

3.2.3. Check DC voltage with CN31 connector while the fan motor is rotating.

NOTE :

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

• Use a thin test rod.

Indoor fan starts rotating when power supply is turned on.

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

Measure voltage between 3 (GND : BLACK)

and 5 (V line : YELLOW) of motor connector (CN31)

while indoor fan motor is rotating.

DC 1.0V or more

P.C. board is defective.

Under DC 1.0V

Motor is defective.

Yellow

Black

P.C. board

CN31

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

Replace P.C. board. Replace motor.

– 81 –

FILE NO. SVM-10019

(5) Troubleshooting for remote controller <Primary check>

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

Is receiver

on indoor unit

exposed to

direct sunlight?

YES

Is there any

fluorescent light

nearly?

YES

Push the [ ] button.

Is transmission

mark indicated?

YES

Reset by take off

[ ] button till LCD

indication disclear

put battery again.

Does indoor unit

operate when moving

remote controller

near receiver or

indoor unit?

YES

Batteries are

exhausted.

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

battery the push

Avoid direct sunlight.

Replace main

P.C. Board

Keep indoor unit

away from

fluorescent light.

Does A/C operate?

by push RESET button

of indoor unit.

YES

Point remote to

digital camera can

see infrared at sending

LED on carmera monitor

when push [ ] button?

YES

Reciver P.C. board

is defective.

Replace reciver

P.C. board.

Replace batteries.

Push the

[ ] button

Is transmission mark indicated?

YES

Does indoor unit

beep and operate?

YES

Normal

operation

Remote controller

is defective.

Replace remote controller.

– 82 –

FILE NO. SVM-10019

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

(1) Outdoor unit does not operate

1) Is the voltage between L1 and of the indoor terminal block varied? Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the follow-

ing diagram.

NOTE:

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

• Be sure to prepare a diode for judgment.

Terminal block at indoor side

Red

White

S5277G

Terminal block

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

Tester

Normal time : Voltage swings between DC15 and 60V. ................... Inverter Assembly check (11-8-1.)

Abnormal time : Voltage does not vary.

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

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

Gas circulation amount is down.

Measure gas pressure.

Thermo. operation of compressor

Gas shortage

Gas leak

Pipe clogging

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

To item of Outdoor unit does not operate.

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

Gas leak

P.M.V. is defective.

Miswiring of connecting wires of indoor/outdoor units

Clogging of pipe and coming-off of TC sensor

Refer to the chart in 11-6.

– 83 –

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

1C 1E

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

Valve drive check

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

FILE NO. SVM-10019

Is coil of the pulse motor valve

(P.M.V.) correctly set?

YES

Is connecter of coil connected to inverter?

YES

Disconnect PMV connector then check coil resistance.

(white-Red, Red-Orange, Yellow-Red, Blue-Red)?

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

NOTE :

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

Is it 46±4

Ω

/Phase

YES

Set it correctly.

Replace coil valve.

Set it correctly.

Gas amount check and valve clogging check

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

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

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

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

the valve is clogged.

YES

– 84 –

Replace valve.

Add gas.

11-7. How to Diagnose Trouble in Outdoor Unit

Check Power Supply

(Voltage Rate ±10%)

YES

Turn OFF power

supply.

Remove connector

of compressor.

FILE NO. SVM-10019

Check 25A

fuse (F01)

failure?

YES

Turn ON power

Supply.

Check terminal

Voltage of electrolytic

capacitor are in

(Voltage Rate

±10%) x 1.414?

Replace control board.

Check component

parts of control board

assembly by visual.

(damage, burn,.. Etc.)

YES

Replace fuse.

• Connect discharge resistance (approx. 100Ω, 40W) or soldering iron (plug) between +, – terminals of the electrolytic capacitor (500µF ) of C14 (with printed CAUTION HIGH VOLTAGE) on P.C. board.

Discharging position (Discharging period 10 seconds or more)

Plug of soldering iron

YES

Turn ON the unit

by remote controller

and wait for 3 min.

(Cooling : 17°C)

Replace control board.

– 85 –

FILE NO. SVM-10019

Compressor

is normal

YES

Does outdoor fan

operate normally?

YES

Does compresser

operate normally?

Turn OFF power

supply.

Check compressor

winding resistance

correct?

YES

Replace outdoor

fan motor.

Turn OFF power

supply.

Remove connector CN300 of

outdoor fan motor.

Check winding resistance by

ohmmeter are correct?

Check rotor locking by rotate

with hand. Can it rotate?

YES

Replace control

board.

Turn ON power

supply.

Check voltage of the

compressor connector

is in rate.

(AC150V-270V)?

YES

Replace

compressor.

Replace

compressor.

Replace control

board.

– 86 –

FILE NO. SVM-10019

11-8. How to Check Simply the Main Parts

11-8-1. How to check the P.C. board (Indoor unit)

(1) Operating precautions

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

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

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

11-8-2. How to shorten time for start the compressor.

1. Turn on remote.

2. Setting requirment operation.

3. Push off remote.

. Press [SET] button while pressing [CHECK] button

with a tip of a pencil.

5. Then press [ ] button to transmit the signal to the indoor unit.

(2) Inspection procedures

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

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

a. Main P.C. board part:

DC power supply circuit (5 V, 12 V), Indoor fan motor control circuit, CPU and peripheral circuits, buzzer, and Driving circuit of louver.

b. Indication unit of infrared ray receiving

Infrared ray receiving circuit, LED:

PRESET

ONE-TOUCH

FAN

TEMP

MODE

QUIET

SWING

TIMER

SLEEP

CHK

°C/°F

COMFORT

SLEEP

FIX Hi-POWER ECO

OFF

FILTER

CLOCK

CLR

SET

This setting helps to shortern a compressor waiting period when operate cool, heat or dry mode.

A compressor suddenly starts one order of Remote controller is received.

– 87 –

11-8-2. 8 P .C . Board Layout

( RAS-09LKV-UL )

FILE NO. SVM-10019

[1] Sensor characteristic table

100

Resistance value (k )

0102030 4050

Temperature ( C)

TA, TC, TO, TE, TS

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

– 88 –

( RAS-12LKV-UL )

FILE NO. SVM-10019

[1] Sensor characteristic table

100

Resistance value (k )

0102030 4050

Temperature ( C)

TA, TC, TO, TE, TS

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

–89 –

11-8-3. Indoor Unit (Other Parts)

FILE NO. SVM-10019

No.

Room temp. (TA) sensor

Part name

Heat exchanger (TC) sensor

23Remote controller

Louver motor MP24Z3T

4 Indoor fan motor

11-8-4. Outdoor Unit

No.

Compressor (Model : DA111A1F-20F2)

RAS-12LAV-UL

(Model : DA89X1C-23FZ2)

RAS-09LAV-UL

Part name

Checking procedure

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

Sensor

Temperature

TA, TC (kΩ)

10°C20°C25°C30°C40°C

20.7 12.6 10.0 7.9 4.5

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

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

White Yellow Yellow Yellow Yellow

Position

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

Resistance value

250 ± 20Ω

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

Checking procedure

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

Red

Position

Resistance value

DA111A1F-20F1

DA89X1C-1F-23FZ

Red - White

White Blac

White - Black

Black - Red

0.88 to 0.98Ω

1.04 to 1.16Ω

at 20ºC

Outdoor fan motor (Model : ICF-340UA0-2)

4-way valve coil (Model : STF)

Pulse motor valve coil (Model : CAM-MD12TCTH-4)

Outdoor temperature sensor

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

Measure the resistance value of winding by using the tester.

Red

White Black

Position

Red - White

White - Black

Black- Red

Resistance value

20 to 22Ω 20 to 22Ω 20 to 22Ω

at 20ºC

Measure the resistance value of winding by using the tester.

Resistance value

1435 ± 144Ω

at 20°C

Measure the resistance value of winding by using the tester.

COM

Position

Gray - White

Gray - Orange

Red- Yellow

COM

254

Red- Blue

Resistance value

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

at 20°C

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

Sensor

Temperature

TD (kΩ)

TO,TS,TE (kΩ)

10°C20°C25°C30°C40°C50°C

100 64 50 41 27 18

20.7 12.6 10.0 7.9 4.5 —

– 90 –

11-8-5. Checking Method for Each Part

FILE NO. SVM-10019

No.

2 Diode block 1. Turn OFF the power supply breaker.

Part name

Electrolytic capacitor (For boost, smoothing)

Checking procedure

1. Turn OFF the power supply breaker.

2. Discharge all three capacitors completely.

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

4. Check that vessel is not swollen or exploded.

5. Check that electrolytic liquid does not blow off.

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

C12 C13 C14

MCC-5009 Soldered

Heat sink IGBT side

C12, C13, C14 → 500µF

2. Completely discharge the four electrolytic capacitors.

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

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

12 3

–

surface

+ –

01)

(DB

Case that product is good

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

Tester rod

+ –

–

10 to 20 Ω when the multimeter probe

is reversed

Resistance value

in good product

∞

– 91 –

FILE NO. SVM-10019

11-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

1. Symptom

• Outdoor fan motor does not rotate.

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

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

2. Cause

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

1) Mechanical lock of the outdoor fan motor

2) Winding failure of the outdoor fan motor

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

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

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

Turn OFF the breaker.

Disconnect two connectors (CN300) of the

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

Does the fan rotate without trouble

when rotating it with hands?

YES

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

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

YES

Fan motor is normal.

(Outdoor P.C. board error)

CN300

Fan motor error

NOTE :

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

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

– 92 –

FILE NO. SVM-10019

12. HOW TO REPLACE THE MAIN PARTS

WARNING

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

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

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

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

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

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

If a gas stove or other appliance is being used, extinguish the flames before proceeding.

If the flames are not extinguished, they may ignite any oil mixed with the refrigerant gas.

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

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

3. Do not bring welding equipment near flammable objects.

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

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

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

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

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

12-1. Indoor Unit

No.Part name

Front panel

Procedures

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

2) Open the air inlet grille, push the arm toward the outside, and remove the grille.

3) Remove the left and right air filters.

Remarks

– 93 –

FILE NO. SVM-10019

No.Part name

Front panel

Procedures

4) Press "PUSH" part under the front panel and remove hooks of the front panel from the installation plate.

5) Remove the front panel fixing scre ws. (2 pcs.)

6) Take off three hooks of panel from rear side.

Remarks

Installation plate

Front panel

Press

2 Screws

Three hooks

1) Press three center positions and two lower center positions of the air outlet, and then hang the hanging hooks (3 pcs.) at the top side of the front panel to the rear plate.

2) Tighten two screws.

• Incomplete hanging or incomplete pressing may cause a dewdrops or generation of a fluttering sound.

– 94 –

FILE NO. SVM-10019

No. Part name

Electric parts

box assembly

Procedures

1) Follow the procedure up to 3) in  above.

2) Remove screw of earth lead attached to the end plate of the evaporator.

3) Remove the lead wire cover, and remove connector for the fan motor and connector for the louver motor from the electric parts box assembly.

4) Pull out TC sensor from sensor holder of the evaporator.

5) Disengage the display unit by simply pushing at the top of the display unit.

) Remove the fixing screw that secures the

electric parts box assembly, and remove the

assembly.

TC sensor

Earth Screw

Remarks

Electric part box cove

Fan motor

connector

1) Hook the top part of the electric parts box assembly onto the claws on the back body, and secure it using the fixing screw. Now attach the display unit. Connect the connectors for the fan motor and louver motor.

2) Secure the grounding wire using the fixing screw. Insert the TC sensor into the sensor holder.

* Be absolutely sure to loop the grounding

wire and TC sensor leads once at the bottom.

Fixing screw

Louver motor

connector

AC fan motor

connector

– 95 –

FILE NO. SVM-10019

No. Part name

Horizontal louver

Evaporator



(Heat exchanger)

Procedures

Remarks

1) Remove shaft of the horizontal louver from the back body. (First remove the left shaft, and then remove other shafts while sliding the horizontal louver leftward.)

1) Follow to the procedure in the item .

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

3) Remove two fixing screws at the left side of the end plate of the heat exchanger.

2 screws

4) Remove one fixing screw on the heat exchage fixing holder to separate the heat exchage from the back body.

5) Remove one screw at below right side of heat exchanger that used for fixing between heat exchanger and back body by Fix

Evaporator (DN) The Fix Evaporator (DN) is used for transportation only and can be removed without any concern to unit operation. Follow to 7) for removing.

6) Remove right side of the end plate from two fixing rib while sliding slightly the heat exchanger rightward.

Heat exchanger fixing

holder

Fix Evaporator (DN)

Screw

– 96 –

Rib on the right side of the end plate

FILE NO. SVM-10019

No. Part name

Evaporator



(Heat exchanger)

Procedures Remarks

7) Unscrew one screw which fix Electrical Control Box and the casing. Move Electrical Control Box until can see one

screw that fix Motor band and unscrew it then remove FIX-EVA-DN

Tighten the screw of Motor band, assembly Electrical Control Box then tighten screw to complete reassembly.

Screw

Motor band

Bearing base



1) Follow to the procedure in the item .

„

2) Remove the two screws used to secure

the bearing base.

3) Remove the bearing base.

• If the bearing is out from the housing,

push it into the specified position and then incorporate it in the main body.

Screw

Two screws

Bearing

Bearing base

– 97 –

FILE NO. SVM-10019

No. Part name

Part name

Fan motor

Procedures

1) Follow to the procedure till item .

…

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

3) Remove two fixing screws of the motor cover and them remove the motor cover.

4) Remove two more fixing screws of the motor band and remove the motor band.

Two screw

Remarks

Set screw

Two screws on

motor band

Motor cover

5) Pull the fan motor outward.

Reference condition of Fan Motor's assembly.

– 98 –

FILE NO. SVM-10019

No. Part name

Cross flow fan



Procedures

1) To incorporate the fan motor incorporate the

motor into the position in the following figure, and then install the fan motor.

• Install the cross flow fan so that the right end of the 1st joint from the right of the cross flow fan is set keeping 5.0 mm from closed wall of the main unit.

• Holding the set screw, install the cross flow fan so that flat area on shaft of the fan motor comes to the mounting hole of the set screw.

• Perform positioning of the fan motor as follows:

• When assembling the fan motor, the fan motor must be installed in such a way that the fan motor leads will be taken out is positioned at the bottom front.

• After assembling the two hooking claws of the motor band (right) into the main body, position the fan motor, insert it, and then secure the motor band (right) using the two fixing screws.

Remarks

Fan motor D shaft 5mm Double point set screw

– 99 –

12-2. Microcomputer

FILE NO. SVM-10019

No.



Part name

Common procedure

Procedure

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

2) Remove the front panel.

• Remove the 2 fixing screws.

3) Remove the electrical part base.

Remarks

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

– 100 –

Toshiba RAS-09LAV-UL, RAS-09LKV-UL, RAS-12LAV-UL, RAS-12LKV-UL User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual