Toshiba RAS-10EAVP-E, RAS-B16EKVP-E, RAS-13EAVP-E, RAS-B13EKVP-E, RAS-16EAVP-E User Manual

SERVICE MANUAL

AIR-CONDITIONER

FILE NO. A04-013

SPLIT TYPE

RAS-B10EKVP-E RAS-B13EKVP-E RAS-B16EKVP-E

RAS-10EAVP-E RAS-13EAVP-E RAS-16EAVP-E

CONTENTS

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

2. SPECIFICATIONS ........................................................................................ 5

3. REFRIGERANT R410A............................................................................... 7

4. CONSTRUCTION VIEWS ......................................................................... 15

5. WIRING DIAGRAM..................................................................................... 17

6. SPECIFICATIONS OF ELECTRICAL PARTS .......................................... 18

7. REFRIGERANT CYCLE DIAGRAM ......................................................... 19

8. CONTROL BLOCK DIAGRAM ................................................................. 22

9. OPERATION DESCRIPTION .................................................................... 24

10. INSTALLATION PROCEDURE ............................................................... 48

11. HO W TO DIAGNOSE THE TR OUBLE..................................................... 62

12. HOW TO REPLACE THE MAIN PARTS.................................................. 84

13. EXPLODED VIEWS AND PARTS LIST................................................ 104

14. APPENDIX ............................................................................... Appendix-1

– 2 –

1. SAFETY PRECAUTIONS

For general public use

Power supply cord of outdoor unit shall be more than 1.5 mm2 (H07RN-F or 245IEC66) polychloroprene sheathed flexible cord.

• Read this “SAFETY PRECAUTIONS” carefully before servicing.

• The precautions described below include the important items regarding safety. Observe them without fail.

• After the servicing work, perform a trial operation to check for any problem.

• Turn off the main power supply switch (or breaker) before the unit maintenance.

CAUTION

New Refrigerant Air Conditioner Installation

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

R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with the adoption of the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigeration machine oil does not enter into the new type refrigerant R410A air conditioner circuit. To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port on main unit and installation tools are different from those used for the conventional refrigerant units. Accordingly, special tools are required for the new refrigerant (R410A) units. For connecting pipes, use new and clean piping materials with high pressure fittings made for R410A only , so that w ater and/or dust does not enter . Moreo v er, do not use the existing piping because there are some problems with pressure fittings and possible impurities in existing pipi

ng.

CAUTION

TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY

This appliance must be connected to the main power supply by a circuit breaker or a switch with a contact separation of at least 3 mm.

The installation fuse (25A D type ) must be used for the power supply line of this air conditioner

DANGER

• Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.

Inappropriate servicing may result in water leakage, electric shock or fire.

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

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

DANGER: HIGH VOLTAGE

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 ha

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

ELECTRIC PARTS MAY BE DAMAGED.

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

FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.

• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS

INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

• TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT WELL

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

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL NOT TO

ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY OTHER GASEOUS BODY INTO THE REFRIGERATION CIRCUIT. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CIRCUIT WILL BECOME ABNORMALLY HIGH AND IT MAY RESULT IN THE PIPE BURSTING AND POSSIBLE PERSONNEL INJURIES.

• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE SERVICE WORK AND THE

INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS IS HEATED, SUCH AS BY FIRE, GENERATION OF POISONOUS GAS MAY RESULT

nd.

– 3 –

WARNING

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

• Do not install in a place which cannot bear the weight of the unit. Personal injury and property damage can result if the unit falls.

• After the installation work, confirm that refrigerant gas does not leak. If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas may generate.

• The electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make

sure the air conditioner uses an exclusive circuit.

An insufficient circuit capacity or inappropriate installation may cause fire.

• When wiring, use the specified cables and connect the terminals securely to prevent external forces applied to the

cable from affecting the terminals.

• Be sure to provide grounding. Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone cables.

• Conform to the regulations of the local electric company when wiring the power supply. Inappropriate grounding may cause electric shoc

CAUTION

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

• 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 or discharged air might disturb neighbors.

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

• Perform the specified installation work to guard against an earthquake. If the air conditioner is not installed appropriately, accidents may occur due to the falling

unit.

For Reference:

If a heating operation would be continuously performed for a long time under the condition that the outdoor temperature is 0°C or lower, drainage of defrosted water may be difficult due to freezing of the bottom plate, resulting in a trouble of the cabinet or fan.

It is recommended to procure an anti freeze heater locally for a safety installation of the air conditioner. For details, contact the dealer.

– 4 –

2. SPECIFICATIONS

2-1. Specifications

RAS-B10EKVP-E/RAS-10EA VP-E, RAS-B13EKVP-E/RAS-13EAVP-E, RAS-B16EKVP-E/RAS-16EAVP-E

Un it mo d e l

Cooling capacity (kW) 2.5 3.5 4.5 Cooling capacity range (kW) 0.5–3.5 0.6–4.5 0.8-5.0 Heating capacity (kW) 3.2 4.2 5.5 Heating capacity range (kW) 0.6–5.8 0.6–6.6 0.8-7.8 Power supply 1Ph/50Hz/220–240 V, 1Ph/60Hz/220 V

Electric characteristics

COP (Cooling/Heating) 4.55/4.51 3.80/4.31 3.26/3.64

Operating noise

Indoor unit

Outdoor unit

Piping connection

connection

Accessory

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

Indoor Outdoor

Indoor

Outdoor

Indoor

Outdoor (Cooling/Heating) (dB•A) 46/47 48/50 49/50 Un it mo d e l Dimension

Net weight (kg) 9 9 9 Fan motor output (W) 30 30 30 Air flow rate (Cooling/Heating) (m³/h) 550/610 560/640 640/660 Un it mo d e l Dimension

Net weight (kg) 35 37 37 Com p res so r

Fan motor output (W) 43 43 43 Air flow rate (Cooling/Heating) (m³/h) 2150/2150 2410/2410 24 10/2410 Type Flare connection Flare connection Flare connection

Maximum length (m) 25 25 25 Maximum chargeless length (m) 15 15 15 Maximum height difference (m) 10 10 10 Name o f refrigerant R410 A R410A R410A Refrigerant Weight (kg) 0.82 0.96 0.96 Power supply 3 Wires : includes ear th (O utdoor) Wiring Interconnection 4 Wires : includes ear th

Indoor unit

Outdoor unit

Operation mode Running current (A) 0.15 0.15 0.15 0.15 0.15 0.15 Power consumption (W) 30 30 30 30 30 30 Power factor (%) 87 87 87 87 87 87 Operation mode Running current (A) 2.48/2.37/2.26 3.25/3.10/2.96 4.25/4.06/3.89 4.52/4.31/4.13 6.45/6.17/5.90 7.07/6.76/6.47 Power consumption (W) 520 680 890 945 1350 14 80 Power factor (%) 95 95 95 95 95 95 Starting current (A) 3.40/3.25/3.11 4.67/4.46/4.28 7.22/6.91/6.62

High (Cooling/Heating) (dB•A) 42/43 43/44 45/45 Medium (Cooling/Heating) (dB•A) 33/34 34/35 36/36 Low (Cooling/Heating) (dB•A) 27/27 27/27 29/29

Height (mm) 250 250 250 Width (mm) 790 790 790 Depth (mm) 215 215 215

Height (mm) 550 550 550 Width (mm) 780 780 780 Depth (mm) 290 290 290

Motor output (W) 750 750 750 Type Twin ro tary type w ith D C-inverte r va r iable s pe e d co n trol Model DA111A1F-20F1 DA111A1F-20F1 DA111A1F-20F1

Liquid side Ø6.35 Ø6.35 Ø6.35 Indoor unit Gas side Ø9.52 Ø9.52 Ø12.7 Liquid side Ø6.35 Ø6.35 Ø6.35 Outdoor unit Gas side Ø9.52 Ø9.52 Ø 12 .7

Indoor (Cooling/Heating) (°C) 21–32/0–28 21–32/0–28 21–32/0–28 Usable temperature range Outdoor (Cooling/Heating) (°C) 5–43/–15–24 5–43/–15–24 5–43/–15–24 Installation plate 1 1 1 Wireles s remote c on tro ller 1 1 1 Batteries 2 2 2 Remote c ontroller holder 1 1 1 Zeolite-plus filter 1 1 1 Mounting screw 6 (Ø4 x 25L) 6 (Ø4 x 25L) 6 (Ø4 x 25L) Remote c ontroller holder

mounting screw Plasma Pure filter 1 1 1 Installation m anu al 1 1 1 Owner’s manual 1 1 1 Drain nipple 1 1 1 Water-proof rubber cap 2 2 2

2 (Ø3.1 x 16L) 2 (Ø 3.1 x 16L) 2 (Ø3.1 x 16L)

RAS-B10EKVP-E RAS-B13EKVP-E RAS-B16EKVP-E

RAS-10EAVP-E RAS-13EAVP-E RAS-16EAVP-E

Cooling Heating Cooling Heating Cooling Heating

RAS-B10EKVP-E

RAS-10EAVP-E

RAS-B13EKVP-E

RAS-13EAVP-E

RAS-B16EKVP-E

RAS-16EAVP-E

– 5 –

2-2. Operation Characteristic Curve

10 10

RAS-B10EKVP-E RAS-B13EKVP-E

RAS-B16EKVP-E

Current (A)

0 20406080 120100

• Conditions Indoor : DB 27˚C/WB 19˚C Outdoor : DB 35˚C Air flow : High Pipe length : 7.5m Voltage : 230V

Current (A)

0 20 40 60 80 120140 140100

Compressor speed (rps)

2-3. Capacity Variation Ratio According to Temperature

RAS-B10EKVP-E RAS-B13EKVP-E RAS-B16EKVP-E

• Conditions Indoor : DB 20˚C Outdoor : DB 7˚C/WB 6˚C Air flow : High Pipe length : 7.5m Voltage : 230V

Compressor speed (rps)

110

100

RAS-B10EKVP-E

Capacity ratio (%)

32 34 36 38 40 4233 35 37 39 41 43 44 45

RAS-B13EKVP-E RAS-B16EKVP-E

• Conditions Indoor : DB27˚C/WB19˚C Indoor air flow : High Pipe length : 7.5m

Outdoor temp. (˚C)

Capacity ratio : 100% = 2.5 kW (RAS-B10EKVP-E)

Capacity ratio : 100% = 3.5 kW (RAS-B13EKVP-E)

Capacity ratio : 100% = 4.5 kW (RAS-B16EKVP-E)

120

100

RAS-B10EKVP-E RAS-B13EKVP-E RAS-B16EKVP-E

Capacity ratio (%)

0 –15 –10 –5 0 5 10

• Conditions Indoor : DB 20˚C Indoor air flow : High Pipe length : 7.5m

Outdoor temp. (˚C)

– 6 –

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 ma y 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 Tab le 3-2-1. Never use copper pipes thinner than 0.8 mm even when it is available on the market.

– 7 –

T ab le 3-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

Nominal diameter

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

(2) Joints

For copper pipes, flare joints or 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 3-26 below .

Outer diameter (mm)

6.35

9.52

12.70

15.88

R410A R22

0.80 0.80

1.00 1.00

b) Socket Joints

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

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

T ab le 3-2-2 Minim um thicknesses of soc ket joints

Nominal diameter

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

Reference outer diameter of

copper pipe jointed (mm)

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 other than lubricating oils used in the installed air conditioner is used, and that refrigerant does not leak. When using lubricating oils in the piping processing, use such lubricating oils whose water content has been removed. When stored, be sure to seal the container with an airtight cap or any other cover .

Minimum joint thickness

(mm)

6.35

9.52

12.70

15.88

(1 ) Flare Processing Procedures and Precautions

a) Cutting the Pipe

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

b) Removing Burrs and Chips

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

c) Insertion of Flare Nut

0.50

0.60

0.70

0.80

– 8 –

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.

T able 3-2-3 Dimensions related to flare pr ocessing f or R410A

ØD

Fig. 3-2-1 Flare processing dimensions

Nominal

diameter

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

Nominal

diameter

1/4 3/8

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

1.0

Flare tool for R410A

clutch type

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

T able 3-2-4 Dimensions related to flare pr ocessing f or R22

Outer

diameter

(mm)

6.35

9.52

Thickness

(mm)

0.8

Flare tool for R410A

clutch type

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

A (mm)

Conventional flare tool

Clutch type Wing nut type

A (mm)

Conventional flare tool

Clutch type Wing nut type

1/2 5/8

Nominal

diameter

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

12.70

15.88

T ab le 3-2-5 Flare and flare nut dimensions f or R410A

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

0.8

1.0

Thickness

(mm)

0.8

1.0

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

Dimension (mm)

ABCD

9.1 9.2 6.5 13

13.2 13.5 9.7 20

16.6 16.0 12.9 23

19.7 19.0 16.0 25

– 9 –

Flare nut

width

(mm)

17 22 26 29

T ab le 3-2-6 Flare and flare nut dimensions f or R22

Nominal

diameter

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

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

19.05

Thickness

(mm)

0.8

1.0

45˚ to 46˚

B A

Dimension (mm)

ABCD

9.0 9.2 6.5 13

13.0 13.5 9.7 20

16.2 16.0 12.9 20

19.7 19.0 16.0 23

23.3 24.0 19.2 34

Flare nut

width

(mm)

17 22 24 27 36

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 .

T able 3-2-7 Tightening torque of flare f or R410A [Reference v alues]

Nominal

diameter

Outer

diameter

(mm)

Tightening torque

N•m (kgf•cm)

43˚ to 45˚

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

NOTE :

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

Tightening torque of torque

wrenches available on the market

N•m (kgf•cm)

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

6.35

9.52

12.70

15.88

14 to 18 (140 to 180) 33 to 42 (330 to 420) 50 to 62 (500 to 620) 63 to 77 (630 to 770)

– 10 –

16 (160), 18 (180)

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

3-3. T ools

3-3-1. Required T ools

The service port diameter of packed valv e of the outdoor unit in the air conditioner using R410A is changed to prevent mixing of other refrigerant. To reinf orce the pressure-resisting strength, flare processing dimensions and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.

The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge, clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.

(1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22)) (2) Tools exclusive for R410A, but can be also used f or conventional refrigerant (R22) (3 ) Tools commonly used for R410A and f or con v entional refrigerant (R22) The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)

Tools whose specifications are changed for R410A and their interchangeability

Conventional air

conditioner installation

Whether new equipment can be used with conventional refrigerant

(Note 1)

No.

3 4

5 6

7 8

Used tool

Flare tool Copper pipe gauge for

adjusting projection margin

Torque wrench (For Ø12.7)

Gauge manifold Charge hose

Vacuum pump adapter Electronic balance for

refrigerant charging Refrigerant cylinder Leakage detector Charging cylinder

Usage

Pipe flaring Flaring by

conventional flare tool

Connection of flare nut

Evacuating, refrigerant charge, run check, etc.

Vacuum evacuating Refrigerant charge

Refrigerant charge Gas leakage check Refrigerant charge

Yes

Yes Yes

R410A

Whether conventional equipment can be used

(Note 1)

air conditioner installation

Existence of new equipment for R410A

(Note 2)

X X

X X X

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

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

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

General tools (Conventional tools can be used.)

In addition to the above 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 Ø6.35, Ø9.52) (3) Pipe cutter (4) Reamer

(5) Pipe bender (6) Level vial (7) Screwdriver (+, –) (8) Spanner or Monkey wrench (9) Hole core drill (Ø65)

(10) Hexagon wrench

(Opposite side 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

– 11 –

3-4. Recharging of Refrigerant

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

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

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

Connect the charge hose to the vacuum pump adapter.

Open fully both packed valves at liquid and gas sides.

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

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

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

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

(For refrigerant charging, see the figure below.)

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

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

(INDOOR unit)

(Liquid side)

(OUTDOOR unit)

Opened

Refrigerant cylinder

(With siphon pipe)

Check valve

Open/Close valve

for charging

Electronic balance for refrigerant charging

Fig. 3-4-1 Configuration of refrigerant charging

(Gas side)

Closed

Service port

– 12 –

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

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

[ Cylinder with siphon ] [ Cylinder without siphon ]

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Gauge manifold

OUTDOOR unit

cylinder

Refrigerant

Electronic

balance

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

3-5. Brazing of Pipes

3-5-1. Materi a ls f or B r az i ng

(1) Silver brazing filler

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

Electronic

balance

Siphon

Fig. 3-4-2

(1) Phosphor bronze brazing filler tends to react

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

(2 ) When performing brazing again at time of

servicing, use the same type of brazing filler.

(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.

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.

– 13 –

(2 ) Characteristics required for flux

Nitrogen gas

cylinder

Pipe

Flow meter

Stop valve

From Nitrogen cylinder

Nitrogen gas

Rubber plug

• Activated temperature of flux coincides with the brazing temperature.

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

• It is easy to remove slag after brazing.

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

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

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

(3 ) T ypes 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 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

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 0.05 m3/Hr or 0.02 MPa (0.2kgf/cm2) 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.

Copper - Copper

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

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

(4) Remove the flux after brazing.

Piping

material

Used brazing Used

filler flux

Phosphor copper Do not use

Copper - Iron

Iron - Iron

Silver Paste flux Silver Vapor flux

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

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

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

– 14 –

4-1. Indoor Unit

RAS-B10EKVP-E RAS-B13EKVP-E RAS-B16EKVP-E

4. CONSTRUCTION VIEWS

– 15 –

Parts name of remote control WH-H03JE

4-2. Outdoor Unit

RAS-10EA VP-E, RAS-13EA VP-E, RAS-16EAVP-E

– 16 –

5. WIRING DIAGRAM

5-1. Outdoor Unit

RAS-10EA VP-E, RAS-13EA VP-E, RAS-16EAVP-E

5-2. Indoor Unit

RAS-B10EKVP-E, RAS-B13EKVP-E, RAS-B16EKVP-E

1 2 3 4 5 6

FUSE

F01

AC 250V

T3.15A

CN08 (WHI)

BLK

1 2 3 4 5 6

21 43

High-voltage

Power supply

Ion electrode

BLK BLK

HEAT EXCHANGER

SENSOR (TC)

BLK BLK

THERMO SENSOR

(TA)

CN100

(WHI)

BLU

10 10

WHI

Wireless Unit Assembly

MCC-899

1 2 3 4 1 2 3 4

RED

BRW

1 2 3 4 1 2 3 4

CN01

(BLU)

121

CN03

(WHI)

121

CN13

(WHI)

9 8 7 6 5 4 3 2 1

CN33 (WHI)

9 8 7 6 5 4 3 2

MAIN P.C. BOARD

(MCC-5020)

BLK

BRW

Electrode

Air purifier

TNR

INDOOR

TERMINAL

BLOCK

CN22

LINE

FILTER

BLK WHI

3 1

CN23

DB01

RED

exchanger

GRN & YEL

CN21

DC5V

DC12V

Heat

CN34

(RED)

CN07 (WHI)

CIRCUIT

POWER SUPPLY

Identification

RED WHI BLK BLU BRW ORN PUR YEL GRY PNK GRN& YEL

BRW

121

BLU

CN10 (WHI)

RED

BLK

WHI

YEL

BLU

WHI

YEL

LOUVER MOTOR

Color

RED

WHITE

BLACK

BLUE

BROWN

ORANGE

PURPUL

YELLOW

GRAY

PINK

GREEN&

YELLOW

Micro SW

FAN MOTOR

DC MOTOR

– 17 –

6. SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

RAS-B10EKVP-E, RAS-B13EKVP-E, RAS-B16EKVP-E

No.

Fan motor (for indoor)

Room temp. sensor

(TA-sensor)

Heat exchanger temp. sensor

(TC-sensor)

Louver motor

Parts name

Type

MF-280-30-5

( – )

MP24GA

6-2. Outdoor Unit

RAS-10EA VP-E, RAS-13EA VP-E, RAS-16EAVP-E

No.

Reactor

Outdoor fan motor

Suction temp. sensor

(TS sensor)

Parts name

Model name

CH-57

ICF-140-43-4

(Inverter attached)

Specifications

DC280–340V , 30W

10kΩ at 25°C

Output (Rated) 1W , 16poles, 1phase DC12V

Rating

L=10mH, 16A x 2

DC140V , 43W

10kΩ (25°C)

Discharge temp. sensor

(TD sensor)

Outside air temp. sensor

(TO sensor)

Heat exchanger temp. sensor

(TE sensor)

Terminal block (6P)

Compressor

Coil for PMV

Coil for 4-way valve

(Inverter attached)

——

DA111A1F-20F1

CAM-MD12TF

VHV

62kΩ (20°C)

10kΩ (25°C)

20A, AC250V

3-phases 4-poles 750W

DC12V

AC220-240V

– 18 –

7. REFRIGERANT CYCLE DIAGRAM

7-1. Refrigerant Cycle Diagram

RAS-B10EKVP-E/RAS-10EAVP-E

INDOOR UNIT

Indoor heat

exchanger

Temp. measurement

Pressure measurement Gauge attaching port

Vacuum pump connecting port Deoxidized copper pipe

Outer dia. : 9.52mm Thickness : 0.8mm

4-way valve (STF-0108Z)

Muffler

Compressor DA111A1F-20F1

Outdoor heat

exchanger

Cross flow fan

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

Sectional shape of heat insulator

Allowable height

difference : 10m

Strainer

Pulse motor valve at liquid side (CAM-B22YGTF-2)

Strainer

Max. : 25m Chargeless : 15m Charge : 20g/m (16 to 25m)

Allowable pipe length

Temp. measurement

Propeller fan

OUTDOOR UNIT

NOTE :

Refrigerant amount : 0.82kg

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

NOTE :

• The maximum pipe length of this air conditioner is 25 m. When the pipe length exceeds 15m, the additional charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 200g)

– 19 –

RAS-B13EKVP-E/RAS-13EAVP-E RAS-B16EKVP-E/RAS-16EAVP-E

INDOOR UNIT

Indoor heat

exchanger

Temp. measurement

Pressure measurement Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe

Outer dia. : 9.52mm(13),

12.7mm(16)

Thickness : 0.8mm

4-way valve (STF-0108Z)

Muffler

Compressor DA111A1F-20F1

Outdoor heat

exchanger

Cross flow fan

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

Sectional shape of heat insulator

Split capillary

Ø1.2 x 80

Allowable height

difference : 10m

Strainer

Pulse motor valve at liquid side (CAM-B22YGTF-2)

Max. : 25m Chargeless : 15m Charge : 20g/m (16 to 25m)

Allowable pipe length

Temp. measurement

Propeller fan

OUTDOOR UNIT

Ø1.2 x 80

NOTE :

Refrigerant amount : 0.96kg

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

NOTE :

– 20 –

7-2. Operation Data

Temperature

condition (°C)

Indoor Outdoor

27/19 35/–

Temperature

condition (°C)

Indoor Outdoor

20/– 7/6

Model

name RAS-

B10EKVP-E B13EKVP-E B16EKVP-E

Model

name RAS-

B10EKVP-E B13EKVP-E B16EKVP-E

Standard pressure

P (MPa)

0.9 to 1.1

0.8 to 1.0

0.7 to 0.9

Standard pressure

P (MPa)

2.2 to 2.4

2.5 to 2.7

2.8 to 3.0

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

13 to 15 42 to 44 11 to 14 42 to 45

8 to 11 43 to 47

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

37 to 39 0 to 3 42 to 45 0 to 2 48 to 49 0 to 2

Indoor fan

mode

High High High

Indoor fan

mode

High High High

Outdoor fan

mode

High High High

Outdoor fan

mode

High High High

Compressor

revolution

(rps)

37 59 82

Compressor

revolution

(rps)

54 65 86

NOTES :

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

(Thermistor themometer)

(2 ) Connecting piping condition : 7.5 m

– 21 –

8. CONTROL BLOCK DIAGRAM

8-1. Indoor Unit

RAS-B10EKVP-E, RAS-B13EKVP-E, RAS-B16EKVP-E

Heat Exchanger Sensor(Tc)

Room Temperature Sensor(Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Converter

(D.C circuit)

Noise Filter

M.C.U

Functions

• Cold draft preventing Function

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing (Temperature Processing)

• Timer

• Serial Signal Communication

• Clean Function

Serial Signal Transmitter/Receiver

Indoor Unit Control Unit

Louver

Motor

Louver Motor Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

Air purifier

unit

Micro Switch

From Outdoor Unit

220-240V/50Hz

220V/60Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, HEAT

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Infrared Rays, 36.7kHz

– 22 –

Air Purifier

SLEEP

8-2. Outdoor Unit (Inverter Assembl y)

RAS-10EA VP-E, RAS-13EA VP-E, RAS-16EKVP-E

detect

Current

circuit

Gate drive

detect

Current

Outdoor

Fan motor

Inverter

(DC → AC)

Compressor

P.M.V : Pulse Motor Valve

M.C.U : Micro Control Unit

MICRO-COMPUTER BLOCK DIAGRAM

M.C.U

MCC5009 (P.C.B) OUTDOOR UNIT

• PWM synthesis function

• Input current release control

circuit

Indoor unit

send/receive

circuit

Gate drive

• IGBT over-current detect control

• Outdoor fan control

• High power factor correction control

• Inverter output frequency control

• A/D converter function

• P.M.V. control

• Discharge temp. control

• 4-way valve control

• Signal communication to indoor unit

4MHz

Clock

frequency

circuit

High Power

factor Correction

Converter

(AC → DC)

sensor

Input current

Filter

Noise

Inverter

(DC → AC)

Relay

circuit

of P.M.V.

Driver circuit

valve

4-way

P.M.V.

220–240 V ~ 50Hz

220 V ~ 60Hz

For INDOOR UNIT

Discharge

Outdoor air

temp. sensor

sensor

temp. sensor

Suction temp.

– 23 –

temp.sensor

Heat exchanger

9. OPERATION DESCRIPTION

9-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air conditioner, which uses DC motor for the indoor fan motor and the outdoor fan motor. And the capacityproportional control compressor which can change the motor speed in the range from 13 to 115 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 motor 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 inver ter input current and current release operation

• Over-current detection and pre v ention oper ation to IGBT module (Compressor stop function)

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

• Transferring of operation information (Serial signal) from outdoor unit 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 four-way valve and outdoor fan)

(3) Contents of operation command signal (Serial

signal) from indoor unit controller to outdoor unit controller

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

• Operation mode set on the remote control

• Compressor revolution command signal defined by indoor temperature and set temperature (Correction along with variation of room temperature and correction of indoor heat exchanger temperature are added.)

• Temperature of indoor heat exchanger

• For these signals ([Operation mode] and [Compressor 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.

– 24 –

9-2. Operation Description

No. Contents Page

9-2 1 Basic operation ................................................................................26

1) Operation control ............................................................................................. 26

2) Cooling/Heating operation ............................................................................... 26

3) AUTO operation ............................................................................................... 27

4) DRY operation ................................................................................................. 27

2 Indoor fan motor control...................................................................28

<In cooling operation> .......................................................................................... 28

<In heating operation>.......................................................................................... 29

3 Outdoor fan motor control................................................................30

4 Capacity control ...............................................................................31

5 Current release control ....................................................................31

6 Release protective control ...............................................................32

<In cooling/dry operation> .................................................................................... 32

<In heating operation>.......................................................................................... 32

7 Quick heating control .......................................................................33

8 Defrost control (Only in heating operation)......................................33

9 Louver control..................................................................................3 4

1) Louver position ................................................................................................ 34

2) Air direction adjustment ................................................................................... 34

3) Swing ............................................................................................................... 34

10 ECO operation .................................................................................35

11 Temporary operation........................................................................36

12 Air purifying control ..........................................................................3 7

Air purifying control [Detection of abnormality] ................................38

13 Discharge temperature control ........................................................38

14 Pulse Motor valve (PMV) control .....................................................39

15 Clean operation ...............................................................................40

16 Clean operation release..................................................................4 1

17 Select switch on remote controller ................................................... 42

9-3 Auto Restart Function ..............................................................................43

1 How to Set the Auto Restart Function..............................................43

2 How to Cancel the Auto Restart Function........................................44

3 Power Failure During Timer Operation.............................................44

9-4 FILTER Indicator ......................................................................................4 4

1 How to Turn Off FILTER Indicator ....................................................44

9-5 Remote Controller and Its Fuctions..........................................................4 5

1 Parts Name of Remote Controller....................................................45

2 Name and Functions of Indications on Remote Controller ..............46

9-6 Hi-POWER Mode .....................................................................................47

– 25 –

Item

Operation flow and applicable data, etc.

Description

1. Basic operation

1) Operation control Receiving the user’s operation condition setup, the opera-

tion statuses of indoor/outdoor units are controlled.

Remote controller

Selection

of operation

conditions

ON/OFF

Signal

receiving

Indoor unit

control

Operation

command

Serial signal

send/receive

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

• High power

Indoor unit

Indoor unit control

• Command signal generating function of indoor unit operation

• Calculation function (temperature calculation)

• Activation compensation function of indoor fan

• Cold draft preventive function

• Timer function

• Indoor heat exchanger release control

• Clean function

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

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 left.

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 motor valve.

• Indoor fan motor

• Louver motor

Outdoor unit

Serial signal

send/receive

Outdoor unit

control

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

2) Cooling/Heating operation The operations are performed in the following parts by

controls according to cooling/heating conditions.

Operation ON

Indoor unit

control

Sending of

operation

command signal

Outdoor unit

control

Setup of remote controller

Indoor fan motor control Louver control

Compressor revolution control Outdoor fan motor control 4-way valve control

In cooling operation: ON

[ ]

In heating operation: OFF

Pulse motor valve control

Inverter

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 motor valve and 4-way valve according to the operation signal sent from the indoor unit.

*1. The power coupler of

• Compressor

• Outdoor fan motor

• 4-way valve

• Pulse motor valve (PMV)

4-way valve is usually turned on, and it is turned off during defrost operation. (Only in heating)

– 26 –

Item

Operation flow and applicable data, etc.

Description

1. Basic operation

3) AUTO operation Selection of operation mode As shown in the following figure, the operation star ts by

selecting automatically the status of room temperature (Ta) when starting AUTO operation.

Cooling operation

Ts + 1

Monitoring (Fan)

Ts – 1

Heating operation

*1. When reselecting the operation mode, the fan speed

is controlled by the previous operation mode.

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 20°C or more, the fan operation is performed with ”Super Ultra LOW” mode for 3 minutes. Then, select an operation mode.

5) If the status of compressor-OFF continues for 15 minutes the room temperature after selecting an operation mode (COOL/ HEAT), reselect an 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.

[˚C]

L– (W5)

1.0

0.5

(W5+W3) / 2

SL (W3)

Tsc

Fan speed

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) + (0.0 to 1.0)

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

– 27 –

Item

Operation flow and applicable data, etc.

Description

2. Indoor fan motor control

(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)

COOL ON

Fan speed setup

MANUAL

(Fig. 1)

AUTO

Indication Fan speed

L L+ M M+ H

(L + M) / 2

(M + H) / 2

(Fig. 2)

[˚C]

+2.5 +2.0

+1.5 +1.0

+0.5

Tsc

Air volume AUT O

M+(WB)

L(W6)

*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)

* Symbols

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

* The fan speed broadly varies due

to position of the louver, etc. The described value indicates one under condition of inclining downward blowing.

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, room temperature, and heat exchanger temperature.

(Table 1) Indoor fan air flow rate

– 28 –

Item

Operation flow and applicable data, etc.

Description

2. Indoor fan motor control

HEAT ON

Fan speed setup

AUTO

TC ≥ 42˚C

YES

*Fan speed =

(TC – (42 + a)) / 10 x (WD – W8) + W8

a : In up operation 1, in down operation 0

MANUAL

(Fig. 3)

Indication Fan speed

L L+ M M+ H

Min air flow rate control

52 51

42 41

Limited to Min WD tap

No limit

(L + M) / 2

(M + H) / 2

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.

4) Cold draft prevention, the fa n speed is controlled by temperature of the indoor heat exchanger (Tc) as shown in Fig. 6.

(Fig. 4)

Basic fan control

[˚C]

TSC

–0.5

–1.0

–1.5

–2.0

–2.5 –5.0 –5.5

*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)

(Fig. 5)

[In starting and in stability]

In starting

FAN AUTO

FAN Manual

• Until 12 minutes passed after operation start

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

• Room temp. < Set temp. –4°C

Fan speed

AUTO

L (W8)

*1 *2

M+ (WD)

H (WE)

Cold draft preventive control

Tc 46 46 45 45 33

33 33 21 32 32 20

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

Fan speed in starting

* No limitation while fan speed MANUAL mode is in stability. * A: When Tsc ≥ 24, A is 24, and when Tsc < 24, A is Tsc Tsc: Set value

AUTO

Fan speed

AUTO

in stability

Fan speed

MANUAL

in starting

H (WE)

Line-approximate H and SUL with Tc.

SUL (W2)

Stop

(Fig. 6)

In stability

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

• When 25 minutes or more passed after operation start

• Room temp. ≥ Set temp . –3.5°C

– 29 –

Item

Operation flow and applicable data, etc.

Description

3. Outdoor fan motor control

The blowing air volume at the outdoor unit side is controlled.

Receiving the operation command from the controller of indoor unit, the controller of outdoor unit controls fan speed.

* For the fan motor, a DC motor with non-stage variable

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

Air conditioner ON

(Remote controller)

Indoor unit controller

1) Outdoor unit operation command (Outdoor fan control)

2) Fan speed ≥ 400

when the motor stopped.

Fan motor ON

3) Fan lock NO

4) Motor operates as shown in the table below.

YES

OFF status of

fan motor continues.

Air conditioner

OFF

Alarm

display

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.

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˚ ˚

˚ ˚ ˚

Outdoor fan speed (rpm)

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