Toshiba RAS-09EKV-UL, RAS-09EAV-UL, RAS-12EAV2-UL, RAS-12EKV-UL, RAS-12EAV-UL Service Manual

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R410A

FILE NO. SVM-13069-4

SERVICE MANUAL

SPLIT TYPE

Indoor Unit Outdoor Unit

Revised on Jun, 2014

RAS-09EKV-UL RAS-09EAV-UL

RAS-12EKV-UL RAS-12EAV-UL

RAS-09EKV-UL RAS-09EAV2-UL

RAS-12EKV-UL RAS-12EAV2-UL

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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 ......................................... 22

7. REFRIGERANT CYCLE DIAGRAM ........................................................ 23

8. CONTROL BLOCK DIAGRAM ................................................................ 26

9. OPERATION DESCRIPTION................................................................... 28

10. INSTALLATION PROCEDURE ................................................................ 53

11. HOW TO DIAGNOSE THE TROUBLE...................................................... 70

12. HOW TO REPLACE THE MAIN PARTS................................................... 97

13. EXPLODED VIEWS AND PARTS LIST ................................................. 113

FILE NO. SVM-13069-3

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

! . When you see this symbol on

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

• 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.

FILE NO. SVM-13069

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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.

FILE NO. SVM-13069

− 4 −

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.

FILE NO. SVM-13069

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FILE NO. SVM-13069-2

Unit model Indoor

RAS-09EKV-UL RAS-12EKV-UL

Outdoor

RAS-09EAV-UL, RAS-09EAV2-UL RAS-12EAV-UL, RAS-12EAV2-UL

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

Cooling Heating Cooling Heating

characteristic Running current (208-230V) (A) 0.22-0.20 0.25-0.23 0.22-0.20 0.25-0.23

Power consumption (208-230V) (W) 35 40 30 35 Power factor (%) 76 76 66 66

Outdoor Operation mode

Cooling Heating Cooling Heating

Running current (208-230V) (A) 3.46-3.13 3.88-3.51 4.59-4.15 5.26-4.76 Power consumption (208-230V) (W) 655 760 920 1055 Power factor (%) 91 94 96 96

Starting current (208-230V) (A) 3.68-3.30 4.13-3.74 4.81-4.35 5.51/4.99 EER (Cooling/Heating) (Btu/W.h) 13.0 13.5 12.6 13.0 SEER or HSPF (Btu/W.h) 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

RAS-09EKV-UL RAS-12EKV-UL

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)

cfm (m

/min)

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

Outdoor unit Unit model

RAS-09EAV-UL, RAS-09EAV2-UL RAS-12EAV-UL, RAS-12EAV2-UL

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) 82 (37) 88 (40) Compressor Motor output (w) 750 750

Type

Model DA89X1C-23FZ2 DA111A1F-20F1

Fan motor output (W) 40 40 Air flow rate (Cooling/Heating)

cfm (m

/min)

1060/1060 (30)/(30) 1395/1236 (39.5/35.0) Piping Type Flare connection Flare connection connection Indoor unit Liquid side in. (mm)

∅1/4 (∅6.35) ∅1/4 (∅6.35)

Gas side in. (mm)

∅3/8 (∅9.92) ∅3/8 (∅9.92)

Outdoor unit Liquid side in. (mm)

∅1/4 (∅6.35) ∅1/4 (∅6.35)

Gas side in. (mm)

∅3/8 (∅9.92) ∅3/8 (∅9.92) 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

Usable temperature range Indoor (Cooling/Heating)

70°F-90°F ( 21°C-32°C) / 32°F-82°F (0°C-28°C)

Outdoor (Cooling/Heating)

0°F-115°F (-18°C-46°C) / -4°F-75°F (-20°C-24°C)

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

20.0 10.0

66 (20)

23.0 9.7

66 (20)

Single rotary type with DC-inverter

variable speed control

Twin rotary type with DC-inverter

variable speed control

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

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

2. SPECIFICATIONS

− 6 −

– 7 –

100

105

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

Capacity Ratio (%)

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

RAS-09EKV-UL RAS-12EKV-UL

2-2. Operation Characteristic Curve

2-3. Capacity Variation Ratio According to Temperature

FILE NO. SVM-13069-2

0 102030405060708090100110120

Compressor Speed (rps)

Current (A)

0 102030405060708090100110120

Compressor Speed (rps)

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

Conditions

Indoor : DB 70oF/WB 60oF

(DB 21.1oC/WB 15.6oC)

Outdoor : DB 47oF/WB 43oF

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

RAS-09EKV-UL

RAS-12EKV-UL

RAS-09EKV-UL

Condition Indoor: DB80°F/WB67°F

Indoor Air-Flow Volume: High Pipe Length: 16 ft (5m)

(DB26.7°C/WB19.4°C)

Voltage : 230V

Outdoor Temperature [°F(°C)]

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

Outdoor Temperature [°F(°C)]

100

120

-4 5 14 23 32 41 50

RAS-09EKV-UL RAS-12EKV-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-09EKV-UL) 12000 Btu/h (RAS-12EKV-UL)

(-20) (-15) (-10) (-5) (0) (5) (10)

– 8 –

3. REFRIGERANT R410A

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

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

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

3-1. Safety During Installation/Servicing

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

3-2. Refrigerant Piping Installation

3-2-1. Piping Materials and Joints Used

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

1. Copper Pipes

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

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

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

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

FILE NO. SVM-13069

– 9 –

Table 3-2-1 Thicknesses of annealed copper pipes

Nominal diameter (in.)

1/4 3/8 1/2

Outer diameter (mm)

6.35

9.52

12.70

Thickness in. (mm)

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 b urrs and clean the cut surface before installation.

c) Insertion of Flare Nut

0.0315 (0.80)

FILE NO. SVM-13069

– 10 –

ØD

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.

Fig. 3-2-1 Flare processing dimensions

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

Nominal diameter

1/4

3/8

1/2

Outer

diameter

(mm)

6.35

9.52

12.70

Thickness

in. (mm)

0.0315 (0.8)

A in. (mm)

Flare tool for R410A

clutch type

0 to 0.0197 (0 to 0.5)

Conventional flare tool

Clutch type Wing nut type

0.0394 to 0.0591 (1.0 to 1.5)

0.0591 to 0.0787 (1.5 to 2.0)

0.07874 to 0.0984 (2.0 to 2.5)

Nominal

diameter

1/4

3/8

1/2

Outer

diameter

(mm)

6.35

9.52

12.70

Thickness

in. (mm)

0.0315 (0.8)

A in. (mm)

Flare tool for R22

clutch type

0 to 0.0197 (0 to 0.5)

Conventional flare tool

Clutch type Wing nut type

0.0197 to 0.0394 (0.5 to 1.0)

0.0394 to 0.0591 (1.0 to 1.5)

0.0197 to 0.0394 (0.5 to 1.0)

0.0394 to 0.0591 (1.0 to 1.5)

0.0197 to 0.0394 (0.5 to 1.0)

0.0591 to 0.0787 (1.5 to 2.0)

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

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

Nominal

diameter

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)

0.362 (9.2) 0.256 (6.5)

0.512 (13)

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

0.630 (16.0)

0.508 (12.9)

Flare nut width

in. (mm)

0.669 (17)

0.866 (22)

1.024 (26)

0.0315 (0.8)

0.653 (16.6)

0.906 (23)

FILE NO. SVM-13069

in.

– 11 –

43 to 45

45 to 46

B A

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

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

2. Flare Connecting Procedures and Precautions

a) Make sure that the flare and union portions do not have any scar or dust, etc. b) Correctly align the processed flare surface with the union axis. c) Tighten the flare with designated torque by means of a torque wrench. The tightening torque for R410A is

the same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur. When it is strong, the flare nut may crack and may be made non-removable. When choosing the tighten-

ing torque, comply with values designated by manufacturers. Table 3-2-7 shows reference values.

NOTE :

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

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

Nominal

diameter

1/4

3/8

1/2

Outer diameter

(mm)

6.35

9.52

12.70

Tightening torque

lbf.ft (N•m)

10 to 13 (14 to 18)

24 to 31 (33 to 42)

37 to 46 (50 to 62)

Tightening torque of torque

wrenches available on the market

lbf.ft (N•m)

12 (16), 13 (18)

31 (42)

41 (55)

Nominal

diameter

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

0.354 (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)

0.638 (16.2)

0.508 (12.9)

Flare nut width

in. (mm)

0.669 (17)

0.866 (22)

0.945 (24)

0.0315 (0.8)

0.630 (16.0)

0.787 (20)

FILE NO. SVM-13069

in.

– 12 –

3-3. Tools

3-3-1. Required Tools

The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R410A is changed to prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For ∅ 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

No.

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

Usage

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

R410A

air-water heat pump installation

Existence of new equipment for R410A

Ye s

(Note 2)

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)

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

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

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

General tools (Conventional tools can be used.)

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

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

2. Torque wrench [For Ø1/4, Ø3/8 in.

(∅ 6.35, ∅ 9.52mm)]

4. Reamer

5. Pipe bender

6. Level vial

7. Screwdriver (+, –)

8. Spanner or Monkey wrench

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

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

11. Tape measure

12. Metal saw

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

1. Clamp meter

2. Thermometer

3. Insulation resistance tester

4. Electroscope

3. Pipe cutter

FILE NO. SVM-13069

– 13 –

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

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

(For refrigerant charging, see the figure below.)

Connect the charge hose to the vacuum pump adapter.

Open fully both packed valves at liquid and gas sides.

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

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.

(Indoor Unit)

(Outdoor unit)

Opened

Refrigerant cylinder

(with siphon)

Check valve

Open/close valve for charging

Electronic balance for refrigerant charging

Opened

Closed

Service port

3-4. Recharging of Refrigerant

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

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.

Fig. 3-4-1 Configuration of refrigerant charging

FILE NO. SVM-13069

– 14 –

Gauge manifold

[ Cylinder with siphon ] [ Cylinder without siphon ]

OUTDOOR unit

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Electronic

balance

Refrigerant

cylinder

Electronic

balance

Siphon

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.

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.

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. 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

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.

Fig. 3-4-2

FILE NO. SVM-13069

– 15 –

Nitrogen gas

cylinder

Pipe

Flow meter

Stop valve

From Nitrogen cylinder

Nitrogen gas

Rubber plug

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

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.

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

/Hr) or 2.9 Psi

(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.

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

Piping material

Copper - Copper

Copper - Iron

Iron - Iron

Used brazing filler

Phosphor copper

Silver

Used flux

Do not use

Paste flux

Vapor flux

FILE NO. SVM-13069

– 16 –

4. CONSTRUCTION VIEWS

4-1. Indoor Unit

FILE NO. SVM-13069-3

Unit : Inch (mm)

2-15/32(63)

7-15/32(190)

6-5/16(161) 5-1/2(150)

10-13/16(275)

1-9/16(40)

1-3/4(45)

7-19/32(193)18-7/8(480)

2-7/16(62) 2-11/16(69)

1-7/8(48)

2-15/32(63)

9/32(7)

1-7/8(48)

4-9/16(116)

10-25/32(275)

1-7/8(48)

9/32(7)

24-7/16(621)

8-1/16(205)

31-1/8(790)

8-7/16(215)

9-1/4(235)

8-7/16(215)

6-5/16(161)5-1/2(150)

Front panel

Knockout for leftward piping

Air Þ lter Air inlet

Heat exchanger

Knockout for rightward piping

Knockout for bottom leftward piping

Knockout for bottom rightward piping

Installation plate hanger

Conduit hole (Ø7/8(22) hole)

Connecting pipe (18-5/8(0.40m)) (Flare Ø1/4(6.35))

Installation plate hanger

Connecting pipe (13-25/32(0.35m)) (Flare Ø3/8(9.52))

Wireless remote controller

Drain hose (19-11/16(0.50m))

Remote controller holder

3-5/16(84.5)

3-5/16(84.5)3-5/16(84.5)

Hanger

Center line

Installation plate outline

Minimum distance

to wall

Minimum distance

to wall

Minimum distance

to wall

6-11/16(170)or more

2-9/16(65)or more

Grille Inlet

Air outlet

For stud bold (Ø2-1/4(6))

For stud bold (Ø5/16(8)~Ø13/32(10))

31/32 (26)

3/4 (19)

2-15/32 (63)

2-3/16 (56)

4-29/32 (125)

6-3/4 (157)

4-2. Outdoor Unit

2-23/32 (69)

)572( 8/7-01

3-17/32 (90)

23-5/8 (

600

)

17-5/32 (

436

)

)023( 23/91-21

4-1/4 (

108

)

4-15/16 (

125

)

( 8/3-3

)

( 61/9-4

611

)

13-1/2 (342)

( 61/11-12

055

)

11-7/16 (

290

)

( 23/3-2

)

( 23/5

)

( 6 1/9-5

141

)

1-27/64 (36)

1-31/32 (50)

(R15)

R19/32

)023( 23/91-21

23-5/8 (600)

)603( 46/3-21

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

R19/32 (R15)

23-5/8 (600)

)023( 23/91-21

)603( 4

6/3-21

23-5/8 (

600

)

23( 23/9

-21

Ø1 (Ø25) Water Drain Outlet

Detail-A (Rear Leg)

R7/32 (R5.5)

Ø1/4 Hole (Ø6) Hole

Ø7/16x9/16 Oval-Hole

(Ø11x14) Oval-Hole

Detail-B (Front Leg)

COVER PACKED VALVE

View Z

WIRE GUARD

View Z

Liquid side (Flare Nut : Ø1/4 (Ø6.35))

Gas side (Flare Nut : Ø3/8 (Ø9.52))

Service Port

Air Inlet

Air Oulet

3-15/16 or more

(100 mm or more)

23-5/8 or more

(600 mm or more)

2-R7/32x43/64L (R5.5x17L) U-Shape (For Ø5/16~ Ø13/32 (Ø8~ Ø10) Anchor Bolt)

2-Ø7/16x9/16 (Ø11x14) Oval-Hole (For Ø5/16~Ø13/32 (Ø8~Ø10) Anchor Bolt)

3-15/16 Inch or more

(100 mm or more)

23-5/8 Inch or more

(600 mm or more)

Unit : Inch (mm)

FILE NO. SVM-13069

– 17 –

5. WIRING DIAGRAM

5-1. RAS-09EKV-UL / RAS-09EAV-UL

FILE NO. SVM-13069

– 18 –

– 19 –

FILE NO. SVM-13069

5-2. RAS-09EKV-UL / RAS-09EAV2-UL

5-3. RAS-12EKV-UL / RAS-12EAV-UL

FILE NO. SVM-13069

– 20 –

FILE NO. SVM-13069

5-4. RAS-12EKV-UL / RAS-12EAV2-UL

– 21 –

– 22 –

6. SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

L = 10mH, 16A 2 Outdoor fan motor 3 Suction temp. sensor (TS sensor)

10kΩ (25°C)

4 Discharge temp. sensor (TD sensor)

62kΩ (20°C)

5 Outside air temp. sensor (TO sensor)

10kΩ (25°C)

6 Heat exchanger temp. sensor (TE sensor)

10kΩ (25°C)

7 Terminal block (5P) 30A, AC600V

RAS-09EA Series RAS-12EA Series

9 COIL FOR P.M.V.

DC12V

10 Coil for 4-way valve

CAM-MD 12TCTH-4

STF-01U8Z

Compressor

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

(Inverter attached)

DA89X1C-23FZ2

DA111A1F-20F2

CH-57-Z-T

ICF-340UA40-2 DC340V, 40W

11 Pressure SW.

ACB-4UB82W 4.7 MPa

RAS-09EK Series

(for indoor)

RAS-12EK Series

2 Room temp. sensor (TA-sensor)

10kΩ at 25°C

3 Heat exchanger temp. sensor (TC-sensor)

10kΩ at 25°C

4 Louver motor Output (Rated) 1W, 16 poles, DC12V

( − ) ( − )

24BYJ48-HTP

RPG-240-25A AC240V, 25W

ICF-340U30-2 AC220V, 30W

No.

Fan motor

Parts name

SpecificationsType

No.

Parts name

Model name

Rating

Reactor

3-phases 4-poles 750W

3-phases 4-poles 680W

FILE NO. SVM-13069

6-2. Outdoor Unit

– 23 –

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-09EKV-UL / RAS-09EAV-UL

NOTE :

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

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

NOTE :

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

INDOOR UNIT

Temp. measurement

Indoor heat

exchanger

Cross flow fan

Deoxidized copper pipe

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

Thickness : 1/32 (0.8mm)

Sectional shape of heat insulator

Allowable height

difference : 33ft (10mm)

Allowable pipe length

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Strainer

Pulse Modulating valve at liquid side

4-way valve

Compressor DA89X1C-23FZ2

Outdoor heat

exchanger

Temp. measurement

Propeller fan

Refrigerant amount : 1.77lbs (0.80kg)

OUTDOOR UNIT

Muffler

Min. : 6.6ft (2m) Chargeless : 50ft (15m)

Strainer

Max. : 66ft (20m)

Charge : 0.22oz/ft (51 to 66ft)

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

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

FILE NO. SVM-13069

High Pressure switch

Fusible plug

RAS-09EKV-UL / RAS-09EAV2-UL

– 24 –

RAS-12EKV-UL / RAS-12EAV-UL

NOTE :

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

Max. : 66ft (20m)

Deoxidized copper pipe

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

Thickness : 1/32 in. (0.8mm)

NOTE :

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

INDOOR UNIT

Temp. measurement

Indoor heat

exchanger

Cross flow fan

Deoxidized copper pipe

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

Thickness : 1/32 in. (0.8mm)

Sectional shape of heat insulator

Allowable height

difference : 33ft (10m)

Allowable pipe length

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Strainer

Pulse Modulating valve at liquid side

Ø1.2 x 80

4-way valve

Compressor DA111A1F-20F1

Outdoor heat

exchanger

Split capillary

Temp. measurement

Propeller fan

Refrigerant amount : 2.43 lbs (1.10kg)

OUTDOOR UNIT

Muffler

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

Min. : 6.6ft (2m) Chargeless : 50 ft (15m)

Charge : 0.22oz/ft

(51 to 66 ft)

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

FILE NO. SVM-13069

High Pressure switch

Fusible plug

RAS-12EKV-UL / RAS-12EAV2-UL

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)

116 to 145 52 to 55 104 to 107

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

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)

377 to 406 106 to 106 32 to 36

(2.6 to 2.8) (41 to 43) (0 to 2)

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)

High High 64

09EKV-UL

12EKV-UL

High High

12EKV-UL High High 77

High High 6009EKV-UL

FILE NO. SVM-13069

– 25 –

– 26 –

8. CONTROL BLOCK DIAGRAM

8-1. Indoor Unit

M.C.U.

Indoor Unit Control Unit

From Outdoor Unit

208/230-1-60

Serial Signal Communication

(Operation Command and Information)

Serial Signal Transmitter/Receiver

Converter

(D.C circuit)

Noise Filter

Indoor

Fan Motor

Louver

Motor

Louver Motor Drive Control

Indoor Fan

Motor Control

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Infrared Rays, 36.7kHz

Remote Controller

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

Operation Mode Selection

AUTO, COOL, DRY, HEAT, FAN

REMOTE CONTROLLER

ECO

Hi-POWER

Heat Exchanger Sensor (Tc)

Room Temperature Sensor (Ta)

Infrared Rays Signal Receiver

and Indication

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

Operation ( )

COMFORT SLEEP

QUIET

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

FILE NO. SVM-13069

– 27 –

8-2. Outdoor Unit (Inverter Assembly)

208/230-1-60

MICRO-COMPUTER BLOCK DIAGRAM

Driver circuit

of P.M.V.

Heat exchanger

temp.sensor

Suction temp.

sensor

Outdoor air

temp. sensor

Discharge

temp. sensor

Indoor unit

send/receive

circuit

Relay

circuit

Noise

Filter

Converter

(AC → DC)

Clock

frequency

4MHz

High Power

factor Correction

circuit

Input current

sensor

• PWM synthesis function

• Input current release control

• 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

P.M.V. : Pulse Motor Valve

M.C.U. : Micro Control Unit

M.C.U

For INDOOR UNIT

4-way

valve

P.M.V.

Inverter

(DC → AC)

Gate drive

circuit

Gate drive

circuit

Inverter

(DC → AC)

Outdoor

Fan motor

Compressor

MCC5009 (P.C.B) OUTDOOR UNIT

Current

detect

Current

detect

FILE NO. SVM-13069

– 28 –

  

9. OPERATION DESCRIPTION

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 supply power from inverter to compressor is two-times cycles of the actual number of revolution.

1. Role of indoor unit controller

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

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

• 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.

FILE NO. SVM-13069

– 29 −

9-2. Operation Description

1. Basic operation ........................................................................................................... 30

1. Operation control ................................................................................................... 30

2. Cooling/Heating operation ..................................................................................... 31

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

4. DRY operation........................................................................................................ 31

2. Indoor fan motor control ............................................................................................. 32

3. Outdoor fan motor control........................................................................................... 34

4. Capacity control .......................................................................................................... 35

5. Current release control ............................................................................................... 35

6. Release protective control by temperature of indoor heat exchanger........................ 36

7. Defrost control (Only in heating operation) ................................................................ 37

8. Louver control ............................................................................................................. 38

1) Louver position....................................................................................................... 38

2) Air direction adjustment ......................................................................................... 38

3) Swing ..................................................................................................................... 38

9. ECO operation ............................................................................................................ 39

10. Temporary operation................................................................................................... 40

11. Discharge temperature control ................................................................................... 40

12. Pulse Modulating valve (P.M.V.) control ..................................................................... 41

13. Self-Cleaning function ................................................................................................ 42

14. Remote-A or B selection ............................................................................................ 44

9-3. Auto Restart Function ..

9-3-1. How to Cancel the A uto Restart Function ................................................................. 47

9-3-2. How to set the Au to Restar t Function ....................................................................... 48

9-3-3. Power Failure During Timer Operation .................................................................... 48

9-4. Remote Controller and Its Fuctions

9-4-1. Parts Name of Remote Contr oller .............................................................................. 49

9-4-2. Operation of remote control ....................................................................................... 49

15. QUIET mode ............................................................................................................. 45

16. COMFORT SLEEP mode ......................................................................................... 45

17. One-Touch Comfort .................................................................................................. 45

18. Hi-POWER Mode ...................................................................................................... 46

9-4-3. Name and Functions of Indications on Remote Contr oller ......................................... 52

FILE NO. SVM-13069

19. FILTER Indicator ........................................................................................................ 46

20. Cord heater control .................................................................................................... 46

– 30 –

Item

1. Basic operation

Operation flow and applicable data, etc.

1. Operation control

Description

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.

Remote controller

Indoor unit

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

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

• Indoor fan motor

• Louver motor

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

• Compressor

• Outdoor fan motor

• 4-way valve

• Pulse Modulating valve (P.M.V.)

Signal receiving

Indoor unit control

Operation command

Serial signal send/receive

Selection of

operation conditions

ON/OFF

Serial signal send/receive

Outdoor unit control

Inverter

• COMFORT SLEEP

• QUIET

• PRESET

• ONE-TOUCH

FILE NO. SVM-13069

•

Freeze prevention heater

(V2 Series)

− 31 −

Operation ON

Setup of remote controller

Indoor fan motor control / Louver control / Operation Hz

Control (Requierment)

Indoor unit control

Sending of operation command signal

Outdoor unit control

[ ]

Compressor revolution control / Outdoor fan motor control / 4-way valve control In cooling operation: ON

In heating operation: OFF Pulse Modulating valve control

Item

1. Basic operation

Operation flow and applicable data, etc.

2. Cooling/Heating operation

Description

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.

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.

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.

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.

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)

or more, the fan operation is 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

Ts + 1

Ts – 1

Cooling operation

Monitoring (Fan)

Heating operation

Tsc

+1.0 (0.5)

+2.0 (1.0)

°F [ C]

Fan speed

L– (W5)

(W5+W3) / 2

SUL (W3)

Operation Hz control (Include limit control)

FILE NO. SVM-13069

°C

AUTO mode will reselect cooling or heating operation.

Heat pump Cooling only

Cooling operation

Fan

– 32 –

Item

2. Indoor fan motor control

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)

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.

(Fig. 1)

(Fig. 2)

(Table 1) Indoor fan air flow rate

+4.5 (+2.5)

°F [°C]

+3.5 (+2.0)

+2.7 (+1.5)

+2.0 (+1.0)

+1.0 (+0.5)

Tsc

M+(WB)

L(W6)

Air volume AUTO

L L+ M M+ H

(L + M) / 2

(M + H) / 2

Indication

Fan speed

Fan speed setup

COOL ON

AUTO

MANUAL

*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

(Linear approximation from M+ and L)

FILE NO. SVM-13069

Fan speed Air flow rate Fan speed Air flow rate

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

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)

RAS-12EKV-UL

Fan speed

level

DRYHEATCOOL

RAS-09EKV-UL

– 33 –

Item

2. Indoor fan motor control

Operation flow and applicable data, etc.

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

[In starting and in stability]

(Fig. 3)

(Fig. 4)

(Fig. 5)

Cold draft preventive control

(Fig. 6)

L L+ M M+ H

(L + M) / 2

(M + H) / 2

Indication Fan speed

Fan speed setup

HEAT

AUTO

YES

MANUAL

TC ≥ 107.6ºF (42 C)

Min air flow rate contro

Tc ºF (ºC)

Limited to Min WD tap

* Fan speed=

(

W8) + W

No limi

Fan spee

AUT

Basic fan control

* No limitation while fan speed MANUAL mode is in stabilit

* A: When Tsc ≥ 75°F (24°C), A is 75°F (24°C), and

Tsc: Set value

d e

L+ (W9)

M+ (WD)

*1 *2

H (WE

)

H (WE

)

Linear-approximate H and SUL with Tc

SUL (W2

)

Stop

115 (46) 115 (46)

93 (34)

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

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

Fan speed MAN

AL in startin

Fan speed AUTO in stabilit

Fan speed AUTO in startin

*1: Fan speed = [(M+)

− (

L+)] x 1 4 + L+

*2: Fan speed = [(M+)

− (

L+)] x 2 4 + L+

*3: Fan speed = [(M+)

− (

L+)] x 3 4 + L+

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

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)

°F (°C)

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

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

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

when Tsc < 75°F (24°C), A is Tsc

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)

In stability

• 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)

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.

FILE NO. SVM-13069

126 (52) 124 (51)

108 (42) 106 (41)

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

– 34 –

Item

3. Outdoor fan motor control

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.

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.

Air conditioner ON

(Remote controller)

YES

Indoor unit controller

Fan motor ON

3) Fan lock

4) Motor operates as shown in the table below.

1) Outdoor unit operation command (Outdoor fan control)

Air conditioner

OFF

Alarm

display

2) Fan speed ≥ 400. (by strong wind)

when the motor OFF.

Fan motor OFF continues

(Use wind for heat

exchanging)

Outdoor fan speed (rpm)

Tap

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

f 8 200 200 300 300 370 370 440 440 440 440 500 500 550 550

600 600

Tap

f 9

f A

f B

f C

f D

f E

f F

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

Compressor speed (rps)

During

ECO mode

When To is abnormal

~ 13.8 ~ 31.7

32.3 ~ MAX

MIN MAX MIN MAX MIN MAX

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 2 f 3 f B f C f C f D

In cooling operation

Compressor speed (rps)

During

ECO mode

When To is abnormal

~16.8 ~47.9

48.5 ~ MAX 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

In Heating operation

f 2 f 3 f C f D f E f F

f 0 f 0 f 0 f 1 f 1 f 2

f D f F f D f F f F

f 2 f 3 f 2 f 3 f B f C

f D

f 0 0 0

RAS-09EA Series RAS-12EA Series

To ≥ 100°F (38°C) To ≥ 82°F (28°C) 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)

To ≥ 50°F (10°C) 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)

FILE NO. SVM-13069

RAS-09EA Series RAS-12EA Series

– 35 –

Item

4. Capacity control

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.

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

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.

5. Current release control

Outdoor temp. To

Setup of current release point

Outdoor unit inverter main

circuit control current

High

Low

Reduce compressor speed

Operating current ≤

Setup value

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.

Outdoor temp.

Cooling current release value

Heating current release value

RAS-09EA Series RAS-12EA Series RAS-09EA Series RAS-12EA Series

113ºF (45ºC) 104ºF (40ºC)

61ºF (16ºC)

52ºF (11ºC)

111ºF (44ºC) 102ºF (39ºC)

60ºF (15.5ºC)

51ºF (10.5ºC)

3.97A

4.35A

6.30A

4.27A

4.88A

8.47A

6.30A

7.72A

6.30A

8.10A

6.30A

8.47A

FILE NO. SVM-13069

Set temp. (Ts)

Room temp. (Ta)

Correction value of Hz signal

Detection of electromotive force

of compressor motor winding

Inverter output change

Commutation timing change

Change of compressor speed

Remote contr oller Indoor unit

Ts −Ta

Correction value of Hz signal- Operating Hz

Detection of motor speed (Operation Hz)

and rotor position

Capacity control continues

Current decrease

– 36 –

Item

6. Release protective control by temperature of indoor heat exchanger

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.

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)

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)

(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.

(7 C)

(6 C)

(5 C)

(55 C)

(52 C)

(48 C)

Usual cooling capacity control

Reduction of compressor speed

Indoor heat exchanger temperature

When the value is in Q zone, the compressor speed is kept.

Reduction of compressor speed

Usual heating capacity control

Indoor heat exchanger temperature

When the value is in Q zone, the compressor speed is kept.

45 F

43 F

41 F

131 F

126 F

118 F

FILE NO. SVM-13069

– 37 –

Item

Operation flow and applicable data, etc.

Description

7. Defrost control (Only in heating operation)

(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.

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.

Table 1

* The minimum value of Te sensor 10 to 15 minutes

after start of operation is stored in memory as Te0.

(–5 C)

0’ 10’ 15’ 27’40” 34’

(–7 C)

(–20 C)

Operation time (Minute)

Start of heating operation

Outdoor heat exchanger temperature

C zone

A zone

B zone

A zone

B zone

C zone

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.

23 F

19 F

−

4 F

FILE NO. SVM-13069

Horizontal

blowing

Inclined blowing

Blowing

downward

Air direction

Inclined blowing

Horizontal

blowing

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

Heating operation/

AUTO (HEAT)

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

Item

8. Louver control

1) Louver position

Operation flow and applicable data, etc.

This function controls the air direction of the indoor unit.

Description

• 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.

3) Swing

2) Louver position in heating operation

2) Air direction adjustment

• The position is automatically controlled according to the oper ation

• The set louver position is stored in memory by the microcomputer,

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

1) Louver position in cooling operation

mode (COOL/HEAT).

and the louver returns to the stored position when the next operation is performed. (Cooling/Heating memory position)

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

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

– 38 –

FILE NO. SVM-13069

Fixed Position before start swing

Upper Limit Position.

Lower Limit Position

Swing range 35

Upper Limit Position.

Lower Limit Position.

Fixed Position before start swing.

17.5

Swing range 35

– 39 –

Item

9. ECO operation

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.

Description

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.

* 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

(Room temp. – Set temp.)

(3.5) (3.0) (2.5)

(1.5) (1.0)

TSC

(-1.0)

(-2.0)

(5.5)

1H 2H

11 10

7 6

4 3

OFF

Dry Max

*12 *11

*10

(6.0)

(6.5)

(5.0) (4.5) (4.0)

(2.0)

(0.5)

(-0.5)

Time

Zone

Frequency

FAN

Min Hz

The indoor fan speed is not controlled and can be selected

Hz 09EKV-UL

12EKV-UL

Cool min

DRY max

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

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

operation.

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

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

6.3

5.5

4.5

2.7

2.0

-2.0

-3.5

10.0

11.0

11.7

9.0

8.0

7.0

3.5

1.0

-1.0

(°C)°F

FILE NO. SVM-13069

has been received.

during the ECO operation.

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

< Heating Operation >

ECO Start 30 minutes Time

Compressor speed (Hz)

Room temp. - Set temp.

Zone

09EKV-UL 12EKV-UL

Model

0.0 (0.0)

Compressor stop

-2.0

-3.5

-5.5

-7.0

F(oC)

(1.0) (2.0) (3.0) (4.0)

(7.0) (8.0)

(11.0)-20.0

-22.0

(5.0) (6.0)

(12.0)

Linear aproximation

between A to C

50 43

-16.0

-18.0

20 13

(9.0)

(10.0)

-12.5

-14.0

-9.0

-11.0

Zone

B Zone

C Zone

A Zone

B Zone

C Zone

– 40 –

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.

Description

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.

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.

Filter lamp ON

Press RESET button.

Did you press [RESET] button

for 3 seconds or more?

Did you press [RESET] button

for 10 seconds or more?

Set or Reset [AUTO RESTART]

YES

Temporary [AUTO] operation

Temporary [COOL] Operation

11. Discharge temperature control 1. Purpose

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

2. Operation

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

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.

FILE NO. SVM-13069

– 41 –

Item

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

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.

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)

* 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

Starting up

Initialize

Move to

initial position

PMV open degree control

SH control

release control

Turn OFF by

remote controller

Move to "Stop

Compressor Stop by "Room Temperature

Compressor ON

Defrosting

operation

Control"

Position" (Setup

from factory)

Move to "Defrost

Position" (Setup

from factory)

control

FILE NO. SVM-13069

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.

– 42 –

Item

13. Self-Cleaning

Operation flow and applicable data, etc.

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.

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

function

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

Cooling: Auto (cooling) Dry

Heating: Auto (heating)

Auto (fan only)

Shutdown

Operation time

Up to 10 minutes

No Self-Cleaning operation

performed (0 minutes)

10 minutes

30 mins.

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

Self-Cleaning operation times

second time without delay (within 10 minutes).)

Description

Self-Cleaning operation time

FILE NO. SVM-13069

Item

13. Self-Cleaning function

Operation flow and applicable data, etc.

• Self-Cleaning diagram

Description

Operation display ON OFF OFF

FCU fan

ON ON

OFF

rpm is depend on presetting. (500RPM)

FCU louver OPEN OPEN (12.7º) CLOSE

Timer display

ON or OFF

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

Compressor

ON or OFF

OFF OFF

depend on presetting per room temperature.

CDU fan ON or OFF

OFF OFF

depend on presetting per room temperature.

Cool mode or dry mode

operation more than 10 mins.

Self-Cleaning mode

operate 30 mins.

Automatically turn-off.

Operation time

Turn off by remote controller or

timer-off function.

− 43 −

FILE NO. SVM-13069

How to Set or Cancel Self-Cleaning operation.

(Default setting from factory is ON)

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

2. To cancel Self-Cleaning operation.

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.

The Self-Cleaning is cancelled.

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.

Item

Operation flow and applicable data, etc.

Description

− 44 −

FILE NO. SVM-13069

14. Remote-A or B selection

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.)

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

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

the air conditioner ON.

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.

PCB NO : MCC-5045

PCB NO : WP-020

PCB NO : MCC-5046

J201

Item

Operation flow and applicable data, etc.

Description

− 45 −

FILE NO. SVM-13069

17. One-Touch

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

0 12 25

AUTO

AUTO/L L

Fan Operation

Time after operation starts (min)

Comfort

*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.

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.

16. COMFORT

The principles of comfort sleep mode are:

• Quietness for more comfortable. When

• Save energy by changing room temperature

• The air condition can shut down by itself

Remarks: Comfort sleep mode will not operate in dry

automatically.

mode and fan only mode.

automatically.

room temperature reach setting temperature

• 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.

• 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)

choose the operating hours. Repeat

• Press the [COMFORT SLEEP] button to

pressing to setect thehours.

• If the [COMFORT SLEEP] button is pressed

again means cancel comfort sleep mode.

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

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

SLEEP

Cooling mode

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

−

until the [QUIET] button is pressed once

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.

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.

speed L

again (cancel Quiet mode).

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

15. QUIET mode

temperature and room temperature.

Item

Operation flow and applicable data, etc.

Description

− 46 −

FILE NO. SVM-13069

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.

18. Hi-POWER

([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-

Mode

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

remote controller does not change.) The indoor unit's fan speed level increase 1 tap

• The preset temperature drops 2.0°F (1ºC) (The value of the preset temperature on the

3. Heating operation

remote controller does not change.) The indoor unit's fan speed level increase 1 tap

• The preset temperature increases 3.5°F (2ºC) (The value of the preset temperature on the

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

∗ The Hi-POWER operation will be cancelled

when press [Hi-POWER] button again.

TO temp. Heater output

OFF

4˚C

0˚C

(Equivalent to 75W)

20. Cord heater <Base plate cord heater control>

When TO sensor is defective, turn off normal heater output. When COOL thermostat is ON, turn off the heater output.

1. Purpose

Base plate freeze prevention of the outdoor unit

2. Operation

As shown in the left figure, the base plate freeze preventive heater is controlled by temperature of the outside temp. sensor (TO).

control

(V2 Series only)

– 47 –

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.

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.

Operation

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

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

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

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)

• When the system is operating

FILE NO. SVM-13069

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.

RE S E T

RESET button

RE S E T

RESET button

– 48 –

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

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.

Operation

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

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.

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

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)

• When the unit is in operation

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

FILE NO. SVM-13069

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.

RE S E T

RESET button

RE S E T

RESET button

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) 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)

9-4. Remote controller and Its functions

9-4-1. Parts name of remote controller

− 49 −

3 4 5 6 7 8

12 13

14 15 16 17

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 .

FILE NO. SVM-13069

PRESET

ONE-TOUCH

QUIET

SWING

TIMER

FILTER

CHK

°C/°F

CLOCK

OFF

CLR

SLEEP

SET

FIX Hi-POWER ECO

COMFORT

SLEEP

MODE

TEMP

FAN

– 50 –

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

Press HI-POWER : Start and stop the operation.

operation (except in DRY and FAN ONLY mode)

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.

8. TIMER OPERATION

Setting the ON Timer Setting the OFF Timer

Press ON : Set the desired ON timer.

Press

OFF

: Set the desired OFF timer.

Press

SET

: Set the timer. Press

SET

: Set the timer.

Press

CLR

: Cancel the on timer.

Press : Cancel the OFF timer.

CLR

Press

: Set the ON timer.

Press

SET

Press

OFF

: Set the OFF timer.

Press

SET

button during the ( or )

mark flashing.

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

Setting Everyday Timer

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

( or )

Note:

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

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

FILE NO. SVM-13069

− 51 −

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.)

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

Setting

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)

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.

FILE NO. SVM-13069

– 52 –

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

indicates when the remote controller transmits signals to the indoor unit.

Mode indicator

Indicates the current operation mode. (A : Automatic control

: Cool,

: Dry, : Heat, : Fan only)

Temperature indicator

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

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

mark is shown when holding down 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.

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.

FILE NO. SVM-13069

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.

POWER-SET

– 53 –

10. INSTALLATION PROCEDURE

10-1. Installation Diagram of Indoor and Outdoor Units

FILE NO. SVM-13069-3

Insulate the refrigerant pipes separately, not together.

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

For the rear left and left piping

Wall

Make sure to run the drain hose sloped downward.

Do not allow the drain hose to get slack.

Cut the piping hole slightly sloped downward.

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

Right

Rear right

Bottom right

Rear left

Bottom left

Left

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

Batteries

Flat head wood screw

Remote control holder

Vinyl tape Apply after carrying out a drainage test.

Wireless remote control

Saddle

Extension drain hose (Not available, provided by installer)

Shield pipe

(

)

Installation plate

2-9/16 in. (65 mm)

or more

(

)

(

)

(

)

(

mm)

(

)

Filter

Hook

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

(

)

Conduit

Front panel

Air inlet grille

Before installing the wireless remote controller

• Loading Batteries

1. Remove the battery cover.

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

−

) positions.

3 Batteries

2 Wireless remote controller

C L

Remark :

• Details of accessory and installation parts can be found in the accessory section.

– 54 –

FILE NO. SVM-13069-3

Fig. 10-2-1

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, 5/16 in. (8 mm) thick)

Putty, PVC tapes

Part

Code

Q'ty

One

each

One

each

∅

10-2-1. Field supplied installation part

10-2. Installation

4-1/4 in.

(108 mm)

1-1/8 in. (28 mm)

4-15/16 in.

(125 mm)

(

)

Air inlet

Air outlet

3-3/8 in.

(86 mm)

4 in.

(102 mm)

12-19/32 in.

(320 mm)

23-5/8 in. (600 mm)

3-17/32 in. (90 mm)

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

– 55 –

10-2-2. Accessory and installation parts

FILE NO. SVM-13069-3

Part

No.

Part name (Q’ty)

Installation plate x 1

Wireless remote control x 1

Battery x 2

Part name (Q’ty)

Part

No.

Part

No.

Part name (Q’ty)

Toshiba New IAQ filter (L) x 1

Flat head wood screw ∅3.1 x 16 s x 2

Mounting screw ∅4 x 25 s x 6

Toshiba New IAQ filter (L) x 1

Remote control holder x 1

Others

Name

Owner’s manual

Installation manual

– 56 –

10-2-3. Installation/Servicing Tools

Changes in the product and components

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

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

New tools for R410A

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

Gas leakage detector

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.

Exclusive for HFC refrigerant.

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

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

FILE NO. SVM-13069

– 57 –

10-3. Outdoor Unit

10-3-1. Installation Location

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

• 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 your neighbors.

• A location which is not exposed to a strong winds

• A location free of combustible gases leaks.

• A location which does not block a passage.

• A location where 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 as described in the

CAUTION

1. Install the outdoor unit in a location where there

are no obstructions near its air intake or air outlet.

2. When the outdoor units is installed in a place

that is always exposed to strong winds like on the coast or on a high story of a building, use a field fabricated wind baffle. To minimize the effect of strong winds, specially in windy areas,

Strong wind

FILE NO. SVM-13069-3

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

•

To protect the outdoor unit from snow accumulation,

install a holding frame, and attach a snow protection

hood and plate.

•

Do not use a double-stacked design.

Snow protection plate

Snow protection hood

Snow accumulation line

Holding frame

At least 19-11/16 in. (500 mm)

Install the unit at least 19-11/16 in. (500 mm) above the snow accumulation line.

Anchor bolts

Front

Fig. 10-3-1

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

Half union Flare nut

Externally threaded side

Internally threaded side

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

CAUTION

10-3-2. Refrigerant Piping Connection

Flaring

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

90°

Obliquity Roughness WarpWarp

2. Cut the pipe with a pipe cutter.

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.

Fig. 10-3-3

Fig. 10-3-4

Precautions about lnstallation is Regions

Fig. 10-3-2

section above.

with Snowfall and Cold Temperatures

install the unit as shown below.

FILE NO. SVM-13069-3

Outer dia. of copper pipe Tightening torque

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)

• 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

10-3-3. Wiring Connection

NOTE

All wiring and connections must comply with NEC, CEC, and 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. RUN 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 the figure below 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.

10-3-4. Electrical Work

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. Make sure main power switch is turned OFF before performing service or maintenance.

WARNING

UNIT DAMAGE HAZARD

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

CAUTION

– 58 –

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

Fig. 10-3-5

Stripping length of the Power supply cord and Interconnecting cable

Interconnecting cable

Power supply cord

Terminal block

Unit : inch (mm)

Ground line

Connecting cable Power cord

Ground line

3/8 (10)

1-3/16 (30)

2-12/16 (70)

3/8 (10)

1-3/16 (30)

1-9/16 (40)

Conduit plate

Connector

Lock nut

Valve cover

•

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.

CAUTION

Fig. 10-3-6

Fig. 10-3-7

Fig. 10-3-8

NOTE : Interconnecting cable

• Wire type : minimum AWG14

FILE NO. SVM-13069-3

– 59 –

FILE NO. SVM-13069-3

10-4-2. Cutting a Hole and Mounting the

mounting Plate

Cutting a hole

When installing the refrigerant pipes from the rear.

∅

2-9/16 in. (65 mm)

3-15/16 in.

Pipe hole

Fig. 10-4-1

CAUTION

10-4. Indoor Unit

10-4-1. Installation Location

• A location which provides clearances around the

indoor unit as shown in the diagram in the "CLEARANCES" section.

•

A location where there are no obstacles 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 such that the top

unit.

of the indoor unit comes to at least 6.6 ft (2 m) height. Also avoid putting anything on the top of the indoor

CAUTION

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

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

After determining the pipe hole position on the mounting plate ( ð ), drill the pipe hole ∅ 2-9/16 in. (∅ 65 mm) at a slight downward slant to the outdoor side.

NOTE :

• When drilling a wall that contains a metal lath, wire lath or metal plate, be sure to use a pipe hole brim ring sold separately.

Mounting the mounting plate

Fig. 10-4-2

When the installating plate is directly mounted to the wall

1. To hook up the indoor unit, securely fit the

mounting plate onto the wall by screwing it in the upper and lower parts.

2. To mount the mounting plate on a concrete wall with, anchor bolts, drill the anchor bolt holes as

illustrated in the figure shown below.

3. Make sure the mounting plate is leveled.

CAUTION

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

Anchor bolt holes

Hook

Pipe hole

Mounting plate

Mounting screw

eight

Indoor unit

Thread

6.6 ft (2 m) or more

from floor

7 i

(170

)

3-1

/32 i

(85 mm

)

(

)

(

Fig. 10-4-3

Anchor bolt

Projection

9/16 in. (15 mm)

Installation plate (Keep horizontal direction.)

or less

– 60 –

•

A location that will bear the weight of the unit.

The cener of the pipe hole is above he arrow

(100 mm)

– 61 –

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 cond

uit pipe (according to the local codes)

into the pipe hole on the wall.

5. Remove the conduit mount by loosening the fixing

screw. (Fig. 10-4-

)

. Fix conduit pipe to conduit mount with

the lock nut.

7. Pull out the connecting wire through the conduit pipe and process the wire. (Fig. 10-4-6)

8. Take out the wire to the front and fix it to the terminal block. Be careful not to

mis-wir

e (Fig. 10-4-8)

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 to the indoor unit.

10-4-2. Wiring Connection

FILE NO. SVM-13069-3

Fig. 10-4-4

CAUTION

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

•

In case the unit is to be installed in a 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 p .

NOTE :

• Secure four corners and lower parts of the mounting

plate with 4 to 6 mounting screws to install it.

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

Clip anchor (

field supplied parts)

7 Mounting screw Ø5/32 in. x 1 in.

(∅4 mm x 25 mm)

CAUTION

• Be sure to refer to the system wiring diagram

located inside the front panel.

• Check local electrical

codes and also any

specific wiring instructions or limitations.

NOTE :

• Use stranded wire only.

• Wire type : minimum AWG14

CAUTION

Cord clamp

Terminal block

Terminal cover

Screw

Ground line

Screw

Connecting cable

Screw

Front panel

S L

Ground line

4-5/16 in. (110 mm)

3-5/32 in. (80 mm)

13/16 in. (20 mm)

3/8 in. (10 mm)

Conduit pipe

Conduit mount

Fixing screw

Lock nut

Interconnecting cable

Air inlet grille

Front panel

Fig. 10-4-7

Fig. 10-4-

FILE NO. SVM-13069-3

10-4-3. How to connect remote controller for wire operation> (Optional)

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 toward you to remove it from the rear plate as shown in figure 1 .

4. After removing the front panel, remove the control board

assembly and open the cover as shown in figures 2 and 3 .

5. Arrange the control wire as specified and shown in

figure 4 .

6. Securely connect the control wire to the terminal of the control board as shown in figure 5 (tighten firmly but not

over : 0.12 N·m (0.01 kgf·m).

7. Route the wire along the bottom of the control board

and through the opening of the casing.

Reassemble the control board assembly.

8. Route the wire along with the power supply and

connecting cable as shown on figure 6 .

9. Reassemble the indoor unit by reversing processes

1 to 3.

Fig. 10-4-9

Air inlet grille

Front panel

Fig. 10-4-10

Fig. 10-4-11

* Wire size 28-22AWG

or 0.08-0.32 mm

Outer diameter not over 4.7 mm,

control wire length 30 m. or less.

70 mm

5 mm

Terminal

Tighten firmly but not over

0.12 N·m (0.01 kgf·m)

1. Remove cover of remote controller by sliding down and taking it out.

2. If batteries are installed, please take them out. Do not install batteries for hard-wire installation.

3. With the help of a screwdriver hreak the polyester

sheet as shown on figure

7 .

4. Insert control wire from rear side of the remote controller

as shown in figure 8 .

5. With the provided screws, tighten the control wire to the aremote control terminal as shown in figure 10 (tightening

btorque not to exceed 0.25 N-m (0.03 kgtk-m)) Wire

6. Route the control wire through the gutter way at the rear side of remote controller as shown on figure

11 .

7. Fix provided screw (∅1 3.1 x 16L) to the wall to hang remote controller as shown in figure

12 .

8. Mark and arrange a hole to fix the battery cover screw (∅ 3.1 x 25L) as shown in figure

12 .

9. Fix the battery cover to the remote controller and wall with the provided screw (∅ 3.1 x 25L) as shown in

figure

13 .

(tighten firmly but not over 0.15 N.m (0.02 kgf.m)).

10. Put back the remote controller cover.

specifications are shown in figure 9 .

Fig. 10-4-12

Control wire

30 mm

10 mm

* Wire size 28-22 AWG (0.08~0.32 mm2) Outer diameter not over 4.7 mm,

control wire length 30 m. or less.

Control wire

Terminal

Tighten ﬁ rmly but not over

0.25 N·m (0.03 kgf·m)

7 8

Indoor unit

Control wire

Remote controller

Control board

Control board assembly

– 62 –

Control wire

Notch to route the

Control wire

remote wire through

Polyester sheet

WARNING :

Do not install batteries for hard wire installation

EXPLOSION HAZARD

WARNING :

Do not install batteries for hard wire installation

EXPLOSION HAZARD

FILE NO. SVM-13069-3

*Remark :

Fig. 10-4-13

Control wire

Remote controller hanger

Remote controller

Screw (∅3.1 x 16L) for hang remote controller

Wall

Screw (∅3.1 x 25L) for to battery cover

Remote controller

Battery cover

Screw

Tighten ﬁ rmly but not over 0.15 N·m (0.02 kgf·m)

• When attaching the air inlet grille, perform the same

process as for removal but in reverse order.

10-4-4. Piping and drain hose installation

Fig. 10-4-14

– 63 –

WARNING :

Do not install batteries for hard wire installation

to connect remote control to the air conditioner.

1. It is recommended to use double insulation lead wire

2. For hard-wire operation, 1 remote control can control

only 1 indoor unit.

return to their initial condition when the user shuts

3. In wire operation, (PRESET, TIMER and CLOCK will

down the power supply to the air conditioner.

CAUTION

Die-cutting

Front panel slit

Changing

drain hose

Piping preparation

Rear right

Rear left

Bottom left

Left

Bottom right

Right

Rear right

Bottom right

Rear left

Bottom left

Left

2. Changing drain hose

For leftward connection, bottom-leftward connection and rearleftward connection’s piping, it is necessary to change the drain hose and drain cap.

How to remove the drain cap

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

1. Die-cutting front panel slit

Heat insulator

Drain hose

How to remove the drain hose

Fig. 10-4-16

•

The drain hose can be removed by removing the

screw securing the drain hose and then pulling out the drain hose.

•

When removing the drain hose, be careful of any

sharp edges the steel plate may have. Sharp edges

can cause injuries.

• To install the drain hose, insert the drain hose firmly

until the connection part contacts the heat insulator, and the secure it with the original screws.

With a pair, of nippers, cut out the slit on the leftward or

right side of the front panel for the left or right connection, and the slit on the bottom left or right side of the front panel for the bottom left ot right connection.

INSULATE BOTH LINES

Fig. 10-4-15

WARNING :

Do not install batteries for hard wire installation

EXPLOSION HAZARD

– 64 –

FILE NO. SVM-13069-3

How to fix the drain cap

1) Insert a hexagon wrench 3/16 in. (4 mm) in the center

head of the cap.

Fig. 10-4-17

2) Firmly insert the drain cap.

Fig. 10-4-18

CAUTION

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

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

Fig. 10-4-19

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

Fig. 10-4-20

Insert a hexagon wrench 3/16 in (4 mm)

No gap

Slit

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

(4 mm)

<Left-hand connection with piping>

Bend the connecting pipe so that it is laid within

1-5/8 in. (43 mm) above the wall surface. If the connecting pipe is laid exceeding 1-5/8 in

(43 mm) above the wall surface,

the indoor unit may

set on the wall unstably.

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

Fig.

10-4-

NOTE

If the pipe is bent incorrectly, the indoor unit may set on the wall unstably. After passing the connecting pipe through the pipe hole, connect the connecting pipe

s to the refrigerant

line and wrap facing tape around them.

CAUTION

• Bind the refrigerant lines (two) and connecting

cable with facing tape tightly. In case of leftward piping and rear-leftward piping, bind the refrigerant lines (two) only with facing tape.

• Carefully arrange pipes

such that none of them

stick out the rear plate of the indoor unit.

•

Carefully connect the refrigerant lines and

connecting pipes to

one another 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.

•

Check for gas leaks before insulating.

Installation plate

Refrigerant lines

Indoor unit

Connecting cable

Liquid side

Gas 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.

9-1/16 in.

(230 mm)

1-5/8 in.

(43 mm)

10-5/8 in.

(270 mm)

3/16 in.

Bend the connecting pipe within a radius of 1-3/16 im.

To connect he pipe after the unit has been installed (figure)

(30 mm.)

(To the forefront of flare)

FILE NO. SVM-13069-3

10-4-5. Indoor Unit Fixing

1. Pass the pipe through the hole in the wall and hook the indoor unit on the upper hook of the

installation plate.

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

3. While pressing the indoor unit onto the wall,

hook in at the lower section of the mounting plate.

Pull the indoor unit toward you to confirm that it is firmly hooked up on the mounting plate.

CAUTION

Fig. 10-4-22

• To detach the indoor unit from the mounting plate,

pull the indoor unit toward you while pushing its bottom up as shown in the figure.

Fig. 10-3-23

PushPush

Press (unhook)

Installation plate

Hook here

Hook

10-4-6. Drainage

1. Run the drain hose slopping downward.

NOTE :

• The hole should be made at a slight downward

slant on the outdoor side.

Fig. 10-4-24

(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.

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

water is drained out.

When connecting an extension drain hose, insulate it with shield pipe.

Fig. 10-4-25

Shield pipe

Extension drain hose

Inside the room

Drain hose

Space for pipes

Wall

Drain guide

Fig. 10-4-26

– 65 –

CAUTION

Arrange the drain pipe for proper drainage from the unit.

Improper drainage can result in dew-dropping.

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

Therefore, do not store the power cord and other parts at a height above the drain guide.

• The drain is internally trapped

An external trap is not required

Remote control A-B selection

In case of two systems operating nearby, follow the instructions below to set the remote control to operate

Fig. 10-4-28

FILE NO. SVM-13069-3

– 66 –

Remote control

• Place the remote control away from obstacles (such

as curtain) that may block the signal coming form the

remote control.

Do not install the remote control in a place exposed

to direct sunlight or close to a heating source such

as a stove. Keep the remote control at least 3.3 ft (1 m) apart from the nearest TV set or stereo equipment.

(This is necessary to prevent image disturbances or

noise interference.)

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

Indoor unit

(Top view)

(Side view)

Remote control

Indoor unit

Reception range

Fig. 10-4-27

with one indoor unit at a time.

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

with the tip of a pencil. "00" will be shown on the

display.

4. Press while pushing CHK• "B" will show on

the display and "00" will disappear and the air conditioner will turn OFF B is now memorized.

Note :

1. Repeat above step to reset Remote Control back to A.

2. Remote Control does not display "A".

3. Detault setting of Remote Controller from factory is A.

“B” Display

“00” Display

MODE

10-5. EVACUATING

10-5-1. Evacuating

After the piping has been connected to the indoor unit, you vacuum both units as once.

Vacuuming

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

Using a vacuum pump

Be sure to use a vacuum pump with counter-flow prevention function so that inside oil of the pump does not flow backward into pipes of the air conditioner when the pump stops. (If oil inside of the vacuum pump enters the air conditioner, which uses 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 manifold valve gauge.

4. Operate the vacuum pump to start evacuating. Perform evacuaion for about 15 minutes if the piping length is 66 feet (20 m). (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 manifold valve gauge.

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 of packed valves.

FILE NO. SVM-13069-3

– 67 –

Packed valve at liquid side

Service port (Valve core (Setting pin))

Packed valve at gas side

Vacuum

pump

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

Charge hose (For R410A only)

Handle Hi (Keep full closed)

Manifold valve

Pressure gauge

Compound pressure gauge

Handle Lo

Charge hose (For R410A only)

Connecting pipe

–101 kPa

(–76 cmHg)

Fig. 10-5-1

Hexagon wrench is required.

Service Port Cap

Valve Rod Cap

•

5 IMPORTANT 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 equipment damage or improper operation. Never use the system compressor as a vacuum pump.

CAUTION

10-5-2. Packed valve handling precautions

• Open the valve stem all the way out, but do not

try to open it beyond the stopper.

• Securely tighten the valve cap with torque in the

following table:

Fig. 10-5-2

Pipe size of Packed Valve Size of Hexagon wrench

1/2 in. (12.7 mm and smallers) A = 3/16 in. (4 mm)

Cap Cap Size (H) Torque

Valve Rod Cap

43/64 in. - 3/4 in.

(H17 - H19)

10 to 13 Ibf.ft

(14~18 N·m)

55/64 in. - 1-3/16 in.

(H22 - H30)

24 to 31 Ibf.ft

(33~42 N·m)

Service Port Cap

35/64 in.

(H14)

37 to 46 Ibf.ft

(50~62 N·m)

43/64 in.

(H17)

10 to 13 Ibf.ft

(14~18 N·m)

FILE NO. SVM-13069-3

10-6. SYSTEM REQUIREMENTS

• Minimum refrigerant line length between the outdoor

unit and indoor unit is

6.6ft. (2m).

•

Maximum pipe lengths

Allowable Pipe length T

(ft (m))

Height difference

(ft (m))

66 (20) 33 (10)

Refrigerant pipe sizes

Liquid side Gas side

Outer

Diameter

In. (mm)

Thickness

In. (mm)

Outer diameter

In. (mm)

Thickness

In. (mm)

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

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

10-6-1. Piping (Field supplied)

(Indoor − Outdoor H)

Insulation

– 68 –

Fig. 10-6-1

Refrigerant charge

Unit : ft (m)

Refrigerant charge

Length of refrigerant Pipe

connected to Indoor/

outdoor unit

Additional refrigerant

6.6-50

(2-15m)

None

50-66

(15-20m)

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 to the compressor. * Minimum refrigerant pipe is 6.6ft (2m). Using pipe shorter than that may cause a malfunction of the compressor or other components.

• 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.

•

10-6-2. Power supply Connection and Connecting

Cable

Product

Model

Item

MOCP (MAX Fuse/CB)

Breaker

Connect to

FCU/CDU

Power supply cord

(Not provide)

Interconnecting

cable between

FCU & CDU

(Not provide)

Size

4 (L1, L2, S, )

AWG14

No. of Core

Size

AWG14

No. of Core

15A

CDU

3 (L1, L2, )

RAS-12EKV-UL

RAS-12EAV-UL

MCA 10 13

FCU

CDU

RAS-09EKV-UL

RAS-09EAV-UL

The following are the electrical requirements.

15 20

MCA = Minimum Circuit Amps MOCP = Maximum Over Protection Device Amps

RAS-09EAV2-UL

RAS-12EAV2-UL

– 69 –

10-7. OTHERS

10-7-1. Gas Leak Test

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

Check places for flare nut connection (indoor unit)

Check places for the outdoor unit.

Valve cover

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.)

Fig. 10-7-1

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.

The product was shipped with Auto Restart function in the ON position. Turn it OFF if this function is not

Information

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

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

· Do not operate ON timer and OFF timer.

Note : Default setting of auto restart operation is OK

Fig. 10-7-2

FILE NO. SVM-13069-3

RESET

RESET button

required.

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

• The power main switch is turned off.

• The circuit breaker is tripped.

• ON timer is set.

• The filters are blocked with dust.

• The temperature has been set

improperly.

• Windows or doors are open.

• The air inlet or outlet of the outdoor

unit is blocked.

• The fan speed is too low.

• The operation mode is FAN or DRY.

10-7-5. Troubleshooting (Check Point)

– 70 –

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

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.

No.

2 3 4

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

63 63 64

No.

7 8 9

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

Page

73 75 76

IGBT × 6

FET × 6

MCU

Compressor

Fan motor

Shared potential

Driver

Amplifier

Fig. 11-1

FILE NO. SVM-13069

– 71 –

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.

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

265

to 360V) remains and discharging takes a lot of time. After turning off the power source, if touching the charging section before discharging, an electrical shock may be caused. Discharge the electrolytic capacitor completely by using soldering iron, etc.

< Discharging method >

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

2. As shown below, connect the discharge resistance (approx. 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.

Fig. 11-2

Discharging position (Discharging period 10 seconds or more)

Plug of soldering iron

Inverter cover

P. C. board (Soldered surface)

Fig. 11-3

FILE NO. SVM-13069

– 72 –

11-1. First Confirmation

11-1-1. Confirmation of Power Supply

Confirm that the power breaker operates (ON) normally.

11-1-2. Confirmation of Power Voltage

Confirm that power voltage is AC 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.

Operation of air conditioner

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.

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.

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.

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.

FILE NO. SVM-13069

– 73 –

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

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.

OPERATION (Green) Flashing display (1 Hz)

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

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

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

OPERATION (Green) Flashing display (5 Hz)

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)

Indoor indication

lamp flashes.

Which lamp

does flash?

Item

Check

code

Block display Description for self-diagnosis

FILE NO. SVM-13069

• When turn ON power supply.

• Power supply ON after failure or OFF.

• This flashing display is not air conditioner failure.

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

– 74 –

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 condi-

tion 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

TEMP

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.

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.

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.

PR E S E T

ON E-T OU CH

QU IE T

S WIN G

TI MER

FI LT E R

CH K

CL O CK

OF F

CL R

SL E E P

SE T

FI X Hi-P O WE R E C O

CO MF OR T

S LE E P

MOD E

TE MP

FA N

TOSHIBA

• • •

Fig. 11-4-1

Press [ ] button to release the service mode.

• The display of the remote controller returns to as it

was before service mode was engaged.

Press [CLR] button. After service finish for clear

service code in memory.

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

control.

FILE NO. SVM-13069

°C/° F

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

Check

code

Cause of operation

Air

conditioner

status

Display flashing

error

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

short-Circuit or disconnection. connection is normal, check the

P.C. board.

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.

Action and Judgment

FILE NO. SVM-13069-4

– 75 –

Block distinction Operation of diagnosis function

Check

code

Block

Check

code

Cause of operation

Air

conditioner

status

Display flashing

error

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

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,

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

* 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.

VDC

Time (Min)

34 78

Measured signal voltage by apply diode

3 minutes Delay, start counting from power supply ON or remote OFF.

3 minutes stop

***

Sending signal of the indoor unit when have not return

signal from the outdoor unit.

Voltage variation stop or have not voltage output.

Note : Operation signal of the indoor unit shall be measured in the sending period as

picture below.

FILE NO. SVM-13069-4

– 76 –

Block distinction Operation of diagnosis function

Check

code

Block

Check

code

Cause of operation

Air

conditioner

status

Display flashing

error

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.

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

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.)

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,

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.

Action and Judgment

FILE NO. SVM-13069-4

– 77 –

Block distinction Operation of diagnosis function

Check

code

Block

Check

code

Cause of operation

Air

conditioner

status

Display flashing

error

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 +

10%,

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.)

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 15 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 15 minutes, error count is cleared.

The others Return signal of the outdoor Indoor unit Flashes when 1. Check power supply (Rate +

10%)

(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) 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.

Action and Judgment

FILE NO. SVM-13069-4

– 78 –

Block distinction Operation of diagnosis function

Check

code

Block

Check

code

Cause of operation

Air

conditioner

status

Display

flashing error

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

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

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.

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 +

10%,

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.)

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 15 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 15 minutes, error count is cleared.

Action and Judgment

FILE NO. SVM-13069-4

– 79 –

Compressor failure (High

current).operation, etc.)

FILE NO. SVM-13069

Operation

Measure

Item by symptoms

Check item

Conceivable principle

cause

Parts

(DB01,C27,T01

and IC02)

are defective.

"Troubleshooting for

(RAS-09EKV-UL)

11-5. Judgement of Trouble by Every Symptom

11-5-1. Indoor unit (Including remote controller)

YES

TNOur

(1) Indoor unit is not operated.

n off power supply once, and 5 second later, turn it

on again.

Is OPERATION

lamp blinking?

YES

Is it possible to

turn on

Indoor unit by

pressing

[ ] button

on remote

control?

Does

transmission

mark on remote control flash normally,

and is its signal

transmitted

properly?

Remote control is

defective.

Refer to (5)

Remote Control.

Is fuse (F01)

of indoor control

board blown?

Is voltage

(DC 12V or 5V)

indicated on

indoor

control board

normal?

Microcomputer

is defective.

Replace main

P.C. board.

YES

Unit operates

normally.

Reconnect housing

Does

Connection between

main PC Board

and display PCB are

connect properly ?

– 80 –

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

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

Is OPERATION indicator flashing?

Is it possible to turn on

A/C by pushing

[ ] button

on remote controller?

Is voltage

(DC5V, 12V and 15V)

indicated on rear of

indoor control

board normal?

Does transmission mark

on remote controller flash

normally,and is its signal

transmitted properly?

Does fan

motor connector

between CN10 1 –

3 short-circuit?

Item by symptoms

Operation

Check Item

Considerable principle cause

Measures

Remote controller is defective.

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

Unit operates normally.

Replace main P.C. board

Replace fan motor.

Is fuse (F01)

of indoor control

board blown?

Microcomputer

is defective.

NO NO

YES

YES YES

YES

Point remote to digital

camera. Can see infrared

ray at sending LED

when push [ ] button?

Replace remote control

Does connection

between PC Board

and reciver PCB

Reconnect housing

on camera monitor

YES

are connect properly?

YES

To item of “Indoor unit is not operated”.

Turn on power supply.

Does OPERATION indicator flash?

Is wired correctly to white and

black lead wires of terminal block?

Correct wiring.

( RAS-12EKV-UL)

FILE NO. SVM-13069

– 81 –

YES

– 82 –

(3) Only the indoor motor fan does not operate

1. Is it possible to detect the power supply voltage (AC208–230V) between

and

on the terminal block?

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

( RAS-09EKV-UL)

Replace the fan motor.

YES

Does the fan stop in

no operating status?

Control P.C. board is defective.

Start the operation

with low fan setting

in cool operation.

Does AC 115 V

or higher voltage apply

to between red and black

lead of fan motor?

Does the fan rotate?

Change the setting of

cooling to high fan.

Operation

stops

Shut off the power supply.

Does the cross flow fan rotate normally?

Is the rotation signal (DC+5 V



0 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)

Turn on the power supply.

Replace

bearing of cross

flow fan

Turn the power supply.

Shut off the

power supply once.

Does the fan speed

become higher?

Reconecting the

interconnetion cable

and terminal

block.

Replace the P.C. board.

Normal

Replace the control

P.C. board.

Does an operation

LED 1 Hz blink?

Check connecting

cable or power

supply cord complely?

Check 5V at

display unit?

Main P.C. Board?

Does the fan motor

operate smoothly?

YES

Change Display unit

YES

Check 5V at

YES

FILE NO. SVM-13069

NO NO

FILE NO. SVM-13069

( RAS-12EKV-UL )

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

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

Turn off indoor unit and remove

connector from motor.

Then push [ ] button

on remote controller to stop

flashing lamp on indoor unit.

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

+ and 3 –

of motor connector (CN31)?

(Check this condition

within 15 seconds after

starting unit.)

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)?

Is it possible to detect

DC 294–325V between

+ and 3 – of motor

connector (CN31).

(Motor connection condition)

Is it possible to detect DC 15V

between 4 + and 3 – of

motor connector (CN31).

Is it possible to detect

DC 15V between 4 +

and 3 – of motor

connector (CN31).

Does indoor fan operate?

Peplace main P.C. board.

YES

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

Is it possible to detect

DC 1V or more between

+ and

– of

motor connector (CN

Does fan motor

continue to operate?

Peplace indoor fan motor.

YES

Does check

operation LED flash?

Does check connecting

cable or power supply

cord complely?

in terconnection cable and terminal block

YES

Does check

5V at display unit?

Replace

display unit

Does check 5V

at main P.C board?

Reconnecting the

YES

– 83 –

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).

Is it possible to

change airflow level

to “HIGH”?

Is it possible to

rotate cross-flow fan by

hand properly?

Fan motor operates normally.

Replace bearing of cross-flow fan.

YES

Does check cross-flow

fan bearing normal

condition?

Replace indoor

fan motor.

Peplace main

P.C. board.

Does check display

on remote show high?

Change the new PC

board. Does fan speed

change?

Replace remote

Replace motor

YES

– 84 –

FILE NO. SVM-13069

– 85 –

Indoor fan starts rotating when power supply is turned on.

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.

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

Motor is defective.

Under DC 1.0V

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

CN31

Yellow

Black

P.C. board

Replace P.C. board. Replace motor.

(For DC fan motor in RAS-12EKV-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.

FILE NO. SVM-13069

(For AC fan motor in RAS-09EKV-UL)

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

<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.

45-46)

3.2. If Fan motor still operate, means P.C Board mal-function. Replace P.C Board.

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.

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.

NOTE :

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

• Use a thin test rod.

– 86 –

YES

Push the [ ] button.

Is transmission

mark indicated?

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

Is receiver

on indoor unit

exposed to

direct sunlight?

Avoid direct sunlight.

Keep indoor unit

away from

fluorescent light.

Does indoor unit

operate when moving

remote controller

near receiver or

indoor unit?

Batteries are

exhausted.

Point remote to

digital camera can

see infrared at sending

LED on carmera monitor

when push [ ] button?

Is transmission mark indicated?

Reciver P.C. board

is defective.

Replace reciver

P.C. board.

Replace batteries.

Replace remote controller.

Normal

operation

Remote controller

is defective.

YES

Push the

[ ] button

Does indoor unit

beep and operate?

Reset by take off

battery the push

[ ] button till LCD

(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.

FILE NO. SVM-13069

indication disclear

put battery again.

Is there any

fluorescent light

nearly?

Does A/C operate?

by push RESET button

of indoor unit.

Replace main

P.C. Board

– 87 –

Refer to the chart in 11-6.

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

Gas circulation amount is down.

Measure gas pressure.

Gas shortage Gas leak Pipe clogging

Thermo. operation of compressor

Red

White

Terminal block

S5277G

Tester

Terminal block at indoor side

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

To item of Outdoor unit does not operate.

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

(1) Outdoor unit does not operate

1) Is the voltage between L2 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.

Normal time

Voltage swings between DC15 and 60V. ...................Inverter Assembly check (11-5-1.)

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.

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

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)

FILE NO. SVM-13069

L2 L

– 88 –

YES

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

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

1C 1E

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.

Valve drive check

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

Is connecter of coil connected to inverter?

Is coil of the pulse motor valve

(P.M.V.) correctly set?

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

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

the valve is clogged.

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).

Set it correctly.

Replace coil valve.

Replace valve.

Add gas.

Disconnect PMV connector then check coil resistance.

Is it 46±4Ω/Phase

(white-Red, Red-Orange, Yellow-Red, Blue-Red)?

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

FILE NO. SVM-13069

11-7. How to Diagnose Trouble in Outdoor Unit

YES

Turn ON the unit

by remote controller

and wait for 3 min.

Check component

parts of control board

assembly by visual.

(damage, burn,.. Etc.)

Check Power Supply

(Voltage Rate ±10%)

Replace fuse.

YES

Turn OFF power

supply.

Check 25A

fuse (F01)

failure?

Remove connector

of compressor.

Replace control board.

Check terminal

Voltage of electrolytic

capacitor are in

(Voltage Rate

Turn ON power

Supply.

±10%) x 1.414?

Replace control board.

(Cooling : 17°C)

• 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

FILE NO. SVM-13069

– 89 –

– 90 –

YES

Does outdoor fan

operate normally?

Replace control

board.

YES

Compressor

is normal

Check voltage of the

compressor connector

(AC150V-270V)?

Turn ON power

supply.

Remove connector CN300 of

outdoor fan motor.

Check winding resistance by

ohmmeter are correct?

Check rotor locking by rotate

Turn OFF power

supply.

Replace outdoor

fan motor.

Replace

compressor.

Replace control

board.

Replace

compressor.

YES

Does compresser

operate normally?

with hand. Can it rotate?

Turn OFF power

supply.

Check compressor

winding resistance

correct?

is in rate.

FILE NO. SVM-13069

YES

FILE NO. SVM-13069

(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:

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.

PRESET

ONE-TOUCH

QUIET

SWING

TIMER

FILTER

CHK

°C/°F

CLOCK

OFF

CLR

SLEEP

SET

FIX Hi-POWER ECO

COMFORT

SLEEP

MODE

TEMP

FAN

11-8-2. How to shorten time for start the compressor.

1. Turn on remote.

2. Setting requirment operation.

3. Push off remote.

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.

4. 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.

– 91 –

11-8-2. 8 P .C . Board Layout

100

0102030 4050

Resistance value (k )

Temperature ( C)

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

TA, TC, TO, TE, TS

[1] Sensor characteristic table

( RAS-09EKV-UL )

– 92 –

FILE NO. SVM-13069

+ 12V

GND

+ 5V

+12V

– 93 –

( RAS-12EKV-UL )

100

0102030 4050

Resistance value (k )

Temperature ( C)

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

TA, TC, TO, TE, TS

[1] Sensor characteristic table

FILE NO. SVM-13069

– 94 –

11-8-3. Indoor Unit (Other Parts)

11-8-4. Outdoor Unit

No.

Part name

Room temp. (TA) sensor Heat exchanger (TC) sensor

Checking procedure

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

No.

Part name

Compressor (Model : DA111A1F-20F2)

Checking procedure

Measure the resistance value of winding by using the tester.

Red

White Blac

Red

White Black

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

254

YWR BL

Position

Gray - White

Gray - Orange

Red- Yellow

Red- Blue

Resistance value

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

Temperature

Sensor

TA, TC (kΩ)

10°C20°C25°C30°C40°C

20.7 12.6 10.0 7.9 4.5

White Yellow Yellow Yellow Yellow

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

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

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).

at 20°C

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

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

Temperature

Sensor

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 —

23Remote controller

Louver motor

24BYJ48-HTP

4 Indoor fan motor

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

Position

Red - White

White - Black

Black - Red

Resistance value

0.88 to 0.98Ω

at 20ºC

DA111A1F-20F1

DA89X1C-1F-23FZ

1.04 to 1.16Ω

Position

Red - White

White - Black

Black- Red

Resistance value

20 to 22Ω 20 to 22Ω 20 to 22Ω

Outdoor fan motor (Model : ICF-340UA0-2)

4-way valve coil (Model : STF-01U8Z)

Pulse motor valve coil (Model : CAM-MD12TCTH-4)

RAS-12EA Series

(Model : DA89X1C-23FZ2)

RAS-09EA Series

FILE NO. SVM-13069

at 20ºC

– 95 –

11-8-5. Checking Method for Each Part

No.

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.

MCC-5009 Soldered surface

Heat sink IGBT side

C12 C13 C14

Case that product is good

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

C12, C13, C14 → 500µF

2 Diode block

FILE NO. SVM-13069

1. Turn OFF the power supply breaker.

2. Discharge all three capacitors completely. 3 Check that the normal rectification characteristics are shown in continuity

test b

Diode check

y the tester.

Tester rod

Resistance value in good product

50kΩ or more

(0Ω in trouble)

~+ –~

123

(DB01)

– 96 –

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

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.

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.

Turn OFF the breaker.

Fan motor is normal.

Does the fan rotate without trouble

when rotating it with hands?

Disconnect two connectors (CN300) of the

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

(Outdoor P.C. board error)

Fan motor error

YES

CN300

FILE NO. SVM-13069

– 97 –

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

FILE NO. SVM-13069

– 98 –

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.

Remarks

Press

Front panel

Installation plate

5) Remove the front panel fixing screws.

(2 pcs.)

6) Take off three hooks of panel from rear

side.

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.

2 Screws

Three hooks

FILE NO. SVM-13069

– 99 –

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.

Remarks

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.

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

Electric part box cove

assembly.

connector

AC fan motor

connector

Louver motor

Fixing screw

Earth Screw

TC sensor

connector

Fan motor

FILE NO. SVM-13069

– 100 –

No. Part name

Horizontal louver

Procedures

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.)

Evaporator (Heat exchanger)

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.

Remarks

4) Remove one fixing screw on the heat exchage fixing holder to separate the heat exchage from the back body.

2 screws

Heat exchanger fixing

holder

Screw



FILE NO. SVM-13069

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.

Rib on the right side of the end plate

Fix Evaporator (DN)

Screw

Fix Evaporator (DN)

Toshiba RAS-09EKV-UL, RAS-09EAV-UL, RAS-12EAV2-UL, RAS-12EKV-UL, RAS-12EAV-UL Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual