Toshiba ras-m10g3dv-nd, ras-m13g3dv-e, ras-m13g3dv-nd, ras-m16g3dv-nd, ras-m07g3dv-nd Service Manual

Name: Toshiba ras-m10g3dv-nd
Brand: Toshiba
SKU: 23705491
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SERVICE MANUAL

AIR-CONDITIONER

MULTI-SPLIT TYPE

Indoor unit

FILE NO. A10-1413

Revision 1 : Mar.2015

RAS-M07G3DV-E RAS-M10G3DV-E RAS-M13G3DV-E RAS-M16G3DV-E RAS-M07G3DV-ND RAS-M10G3DV-ND RAS-M13G3DV-ND RAS-M16G3DV-ND RAS-M07G3DV-TR RAS-M10G3DV-TR RAS-M13G3DV-TR RAS-M16G3DV-TR

R410A

CONTENTS

1.SAFETY PRECAUTIONS................................................................................ 2

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

3. REFRIGERANT R410A .................................................................................. 6

4. CONSTRUCTION VIEWS............................................................................. 14

5. WIRING DIAGRAM....................................................................................... 15

6. SPECIFICATIONS OF ELECTRICAL PARTS............................................. 16

7. REFRIGERANT CYCLE DIAGRAM............................................................. 17

8. CONTROL BLOCK DIAGRAM .................................................................... 18

9. OPERATION DESCRIPTION ....................................................................... 19

10. OWNER’S MANUAL and INSTALLATION MANUAL (EXCERPT)........... 44

11. HOW TO DIAGNOSE THE TROUBLE....................................................... 61

12. HOW TO REPLACE THE MAIN PARTS.................................................... 75

13. EXPLODED VIEWS AND PARTS LIST..................................................... 85

14. Appendix.................................................................................................... 88

– 1 –

1.SAFETY PRECAUTIONS

The important contents concerned to the safety are described on the product itself and on this Service Manual. Please read this Service Manual after understanding the described items thoroughly in the following contents (Indications / Illustrated marks), and keep them.

[Explanation of indications]

Indication Explanation

DANGER

WARNING

CAUTION

∗ Property damage: Enlarged damage concerned to property, furniture, and domestic animal / pet

[Explanation of illustrated marks]

Mark Explanation

Indicates prohibited items (Forbidden items to do) The sentences near an illustrated mark describe the concrete prohibited contents.

Indicates mandatory items (Compulsory items to do) The sentences near an illustrated mark describe the concrete mandatory contents.

Indicates cautions (Including danger / warning) The sentences or illustration near or in an illustrated mark describe the concrete cautious

contents.

Indicates contents assumed that an imminent danger causing a death or serious injury of the repair engineers and the third parties when an incorrect work has been executed.

Indicates possibilities assumed that a danger causing a death or serious injury of the repair engineers, the third parties, and the users due to troubles of the product after work when an incorrect work has been executed.

Indicates contents assumed that an injury or property damage (∗) may be caused on the repair engineers, the third parties, and the users due to troubles of the product after work when an incorrect work has been executed.

For general public use

Power supply cord of outdoor unit shall be more than 2.5 mm² (H07RN-F or 60245IEC66) 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 test run 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 water and/or dust does not enter. Moreover, do not use the existing piping because there are some problems with pressure fittings and possible impurities in existing piping.

– 2 –

CAUTION

To disconnect the appliance from the main power supply

A switch or circuit breaker that can disconnect all poles must be included in the fixed wiring. Be sure to use an approved circuit breaker or switch.

DANGER

• The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual.

• 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 power 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 hand.

• 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 resistors, 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.

WARNING

• Do not use any refrigerant different from the one specified for complement or replacement.

Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or explosion of the product or an injury to your body.

• Never modify this unit by removing any of the safety guards or bypass 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 shock.

• Do not modify the products. Do not also disassemble or modify the parts. It may cause a fire, electric shock or injury.

– 3 –

• Exchange to parts specified in service manual, which meet the specification or listed in parts list of service manual. Failure to use specified parts may result in electrical shock, smoke, and/or fire."

• When checking the electric parts, removing the cover of the electric parts box of Indoor Unit and/or front panel of Outdoor Unit inevitably to determine the failure, put a sign “Do not enter” around the site before the work. Failure to do this may result in third person getting electric shock.

• When performing repairs using a gas burner, replace the refrigerant with nitrogen gas because the oil that coats the pipes may otherwise burn. When repairing the refrigerating cycle, take the following measures.

1)Be attentive to fire around the cycle. When using a gas stove, etc., be sure to put out fire before work;

otherwise the oil mixed with refrigerant gas may catch fire.

2)Do not use a welder in the closed room. When using it without ventilation, carbon monoxide poisoning may

be caused.

3)Do not bring inflammable close to the refrigerant cycle, otherwise fire of the welder may catch the

inflammable.

• Once the repair work has been completed, check for refrigerant leaks, and check the insulation resistance and water drainage. If check is not executed, a fire, electric shock, injury or water leakage may be caused.

• Install the access port (ceiling opening) at least 2.5 m above the floor level and attach the grille (locally procured) to the air intake section since otherwise the users may injure themselves or receive electric shocks if they poke their fingers or other objects into the indoor unit while the air conditioner is running.

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.

– 4 –

2. SPECIFICATIONS

Model Name

Cooling capacity (Rated) [kW] 2.0 2.7 3.7 4.5 Cooling Capacity range [kW] *1 *1 *1 *1 Heating Capacity (Rated) [kW] 2.7 4.0 5.0 5.5 Heating Capacity range [kW] *1 *1 *1 *1 Power supply 1Phase, 50Hz, 220-240V / 1Phase, 60Hz, 220V

Electric characteristics *2

External Static Pressure Setting 4steps (10 / 20 / 35 / 45)

Air flow [m3/h]

Sound pressure level [dBA]*3

Fan Unit

Dimensions *4

Net weight [kg] 16 19

Piping connection

Usable indoor temperature range (Cooling / Heating)

Voltage [V] 220 230 240 220 230 240 220 230 240 220 230 240 Running current

[A] Power

Consumption [W] Power Factor [%]62626262

Cooling

Heating

Cooling

Back air intake

Heating

Cooling

Under air intake

Heating

Fan centrifugal fan Motor Output [W] 94 Height [mm] 210 Width [mm] 700 900 Depth [mm] 450

Type Flare connection Liquid side [mm] 6.35 Gas side [mm] 9.52 12.7 Drain port VP25

RAS-M07G3DV-E RAS-M10G3DV-E RAS-M13G3DV-E RAS-M16G3DV-E RAS-M07G3DV-ND RAS-M10G3DV-ND RAS-M13G3DV-ND RAS-M16G3DV-ND RAS-M07G3DV-TR RAS-M10G3DV-TR RAS-M13G3DV-TR RAS-M16G3DV-TR

0.35 0.34 0.32 0.35 0.34 0.32 0.40 0.38 0.36 0.45 0.43 0.42

48 48 54 62

10Pa 20Pa 35Pa 45Pa 10Pa 20Pa 35Pa 45Pa 10Pa 20Pa 35Pa 45Pa 10Pa 20Pa 35Pa 45Pa HH 570 570 610 780 H+ 525 525 555 720 670 690 690 H 475 475 500 580 540 590 600 L+ 430 430 440 500 490 490 560 L 380 380 385 420 HH 570 570 610 780 H+ 525 525 555 720 670 690 690 H 475 475 500 580 540 590 600 L+ 430 430 440 510 490 490 560 L 380 380 385 450 HH 33 34 35 36 33 34 35 36 35 36 37 38 33 34 35 36 H+ 31 32 33 34 31 32 33 34 32 33 34 35 31 31 32 33 H 29303132293031322930313227272931 L+ 27 28 29 30 27 28 29 30 27 28 29 30 24 25 26 29 L 25262728252627282526272822232425 HH 33 34 35 36 33 34 35 36 35 36 37 38 33 34 35 36 H+ 31 32 33 34 31 32 33 34 32 33 34 35 31 31 32 33 H 29303132293031322930313227272931 L+ 27 28 29 30 27 28 29 30 27 28 29 30 25 25 26 29 L 25262728252627282526272823242526 HH 41 42 43 44 41 42 43 44 43 44 45 46 41 42 43 44 H+ 38 39 40 41 38 39 40 41 39 40 41 42 39 39 40 41 H 35363738353637383637383934343638 L+ 33 34 35 36 33 34 35 36 33 34 35 36 31 32 33 36 L 30313233303132333031323327282930 HH 41 42 43 44 41 42 43 44 43 44 45 46 41 42 43 44 H+ 38 39 40 41 38 39 40 41 39 40 41 42 39 39 40 41 H 35363738353637383637383934343638 L+ 33 34 35 36 33 34 35 36 33 34 35 36 32 32 33 36 L 30313233303132333031323328293031

21~32°C / 0~28°C

*1 … Refer to the service manual of the outdoor unit to be combined. *2 … Electrical charasteristics is under FAN ONLY mode HH tap at 35Pa. *3 … Under standard external static pressure line at each pressure setting. *4 … Unit external dimension (except hanging hook)

– 5 –

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 airc onditioner 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 0.8 mm even when it is available on the market.

– 6 –

Table 3-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

Nominal diameter Outer diameter (mm) R410A R22

1/4 6.35 0.80 0.80

3/8 9.52 0.80 0.80

1/2 12.70 0.80 0.80

5/8 15.88 1.00 1.00

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 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

1/4 6.35 0.50

3/8 9.52 0.60

1/2 12.70 0.70

5/8 15.88 0.80

Reference outer diameter of

copper pipe jointed (mm)

Minimum joint thickness

(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 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, slowly cut the pipe so that it is not deformed.

b) Removing Burrs and Chips

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

c) Insertion of Flare Nut

– 7 –

d) Flare Processing

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

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

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

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

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

ØD

Fig. 3-2-1 Flare processing dimensions

Nominal

diameter

Outer

diameter

(mm)

Thickness

(mm)

Flare tool for R410A

clutch type

Conventional flare tool

Clutch type Wing nut type

1/4 6.35 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0

3/8 9.52 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0

1/2 12.70 0.8 0 to 0.5 1.0 to 1.5 2.0 to 2.5

5/8 15.88 1.0 0 to 0.5 1.0 to 1.5 2.0 to 2.5

Table 3-2-4 Dimensions related to flare processing for R22

A (mm)

Nominal

diameter

Outer

diameter

(mm)

Thickness

(mm)

Flare tool for R22

clutch type

Conventional flare tool

Clutch type Wing nut type

1/4 6.35 0.8 0 to 0.5 0.5 to 1.0 1.0 to 1.5

3/8 9.52 0.8 0 to 0.5 0.5 to 1.0 1.0 to 1.5

1/2 12.70 0.8 0 to 0.5 0.5 to 1.0 1.5 to 2.0

5/8 15.88 1.0 0 to 0.5 0.5 to 1.0 1.5 to 2.0

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

Nominal

diameter

Outer diameter

(mm)

Thickness

(mm)

Dimension (mm)

ABCD

Flare nut width

(mm)

1/4 6.35 0.8 9.1 9.2 6.5 13 17

3/8 9.52 0.8 13.2 13.5 9.7 20 22

1/2 12.70 0.8 16.0 16.6 12.9 23 26

5/8 15.88 1.0 19.0 19.7 16.0 25 29

– 8 –

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

Nominal

diameter

Outer diameter

(mm)

Thickness

(mm)

Dimension (mm)

ABCD

Flare nut width

1/4 6.35 0.8 9.0 9.2 6.5 13 17

3/8 9.52 0.8 13.0 13.5 9.7 20 22

1/2 12.70 0.8 16.0 16.2 12.9 20 24

5/8 15.88 1.0 19.0 19.7 16.0 23 27

3/4 19.05 1.0 23.3 24.0 19.2 34 36

B A

(mm)

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

2.Flare Connecting Procedures and Precautions

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

the same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur. When it is strong, the flare nut may crack and may be made non-removable. When choosing the tightening torque, comply with values designated by manufacturers. Table 3-2-7 shows reference values.

NOTE :

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

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

Nominal

diameter

Outer diameter

(mm)

Tightening torque

N•m (kgf•cm)

Tightening torque of torque

wrenches available on the market

N•m (kgf•cm)

1/4 6.35 14 to 18 (140 to 180) 16 (160), 18 (180)

3/8 9.52 33 to 42 (330 to 420) 42 (420)

1/2 12.70 50 to 62 (500 to 620) 55 (550)

5/8 15.88 63 to 77 (630 to 770) 65 (650)

– 9 –

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 Ø12.7 copper pipe) of the refrigerant piping are lengthened.

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

1. Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))

2. Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)

3. Tools commonly used for R410A and for conventional refrigerant (R22)

The table below shows the tools exclusive for R410A and their interchangeability.

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

Tools whose specifications are changed for R410A and their interchangeability

R410A

air-water heat pump installation

No. Used tool Usage

1 Flare tool Pipe flaring Yes *(Note 1) O

Copper pipe gauge for

adjusting projection margin

Torque wrench

(For Ø12.7)

4 Gauge manifold

5 Charge hose

6 Vacuum pump adapter Vacuum evacuating Yes

Electronic balance for

refrigerant charging

8 Refrigerant cylinder Refrigerant charge Yes

9 Leakage detector Gas leakage check Yes

10 Charging cylinder Refrigerant charge (Note 2)

Flaring by conventional flare tool

Connection of flare nut Yes

Evacuating, refrigerant charge, run check, etc.

Refrigerant charge Yes

Existence of new equipment for R410A

Yes *(Note 1) *(Note 1)

Whether conventio nal equipment can be used

××

Yes

××

×× × ××

Conventional air-water

heat pump installation

Whether new equipment can be used with conventional refrigerant

(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

– 10 –

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)

Opened

(Outdoor unit)

Refrigerant cylinder

(with siphon)

Check valve

Opened Open/close valve for charging

Electronic balance for refrigerant charging

Fig. 3-4-1 Configuration of refrigerant charging

Opened

Closed

Service port

– 11 –

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 ]

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

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.

[ Cylinder without siphon ]

Gauge manifold

OUTDOOR unit

cylinder

Refrigerant

Electronic

balance

Siphon

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.

Fig. 3-4-2

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

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

3-5-2. Flux

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.

– 12 –

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 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 m

/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.

Piping material Used brazing filler Used flux

Copper - Copper Phosphor copper Do not use

Copper - Iron Silver Paste flux

Iron - Iron Silver Vapor flux

1. Do not enter flux into the refrigeration cycle.

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

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

4. Remove the flux after brazing.

Flow meter

Stop valve

Nitrogen gas

cylinder

From Nitrogen cylinder

Pipe

Rubber plug

Nitrogen gas

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

– 13 –

4. CONSTRUCTION VIEWS

Hanging bolt pitch A

Unit external dimension B

C (Outside)

25 or less

125(Outside)

210

dimension

Unit external

(Only the position of a

check cover.)

Hanging bolt

Check cover

1/100 or more downward

Flexible drain hose (Accessory)

300 or less

Drain-up piping

177 or less

350 or less

113

100

57.5

WIRELESS REMOTE CONTROLLER

Φ90 knockout hole

(For air taking-in air)

19.7

172

Electrical control box

120

70 18.5

SIGNAL RECEIVING UNIT

Hanging bolt pitch 370

Unit external dimension 450

388

300

Wires drawing-out port

M07~13G3DV 770 M16G3DV

970 900 850 1450

260

110

700

155

173

650

Refrigerant pipe connecting port

(Liquid side)

Drain pipe connecting port

Refrigerant pipe connecting port

(Gas side)

320

1250

– 14 –

Color Indication

RED:RED WHI:WHITE YEL:YELLOW BRW:BROWN

TB01

EARTH

CONNECTION CABLE

1ø220-240V~, 50Hz 1ø 220V~, 60Hz

Symbol Parts name

CN** Connector

F01 Fuse

FM Fan Motor

TB01,02

TC,TCJ Temp.sensor

FS Float Switch

EARTH

Indoor

temp.sensor

Terminal

Block

Drain pump

Motor

LReactor

BLU:BLUE BLK:BLACK GRN:GREEN

TB02

Wired remote controller

(Option)

BLK

WHI

RED

CN22

BLK

5. WIRING DIAGRAM

CN210 F01 T6.3A 250V~

CN67 (BLK)

CN41

(BLU)

CN01

(BLU)

1. Broken line indicate the wiring at site. Long dashed short dashed line indicate the accessories.

2. indicates the terminal block.

indicates the connection terminal.

indicates the connector on the control

P.C.board.

3. indicates the protection ground.

4. indicates the control P.C.board.

(WHI)

154

+ +

䎖䱊

3296

Main P.C.Board MCC-1643

Power supply circuit

CN61(YEL)

123456

T10 (HA)

Check Items Diagnosis result

OPERATION

indicater

CN504

(WHI)

SW501

(External static

pressure setup)

CN71

(CHK)

(DISP)

DC20V DC15V

DC12V DC 7V

CN72

CN214(WHI)

354612

Quick check for diagnosing faults

Check to see if the OPERATION indicater goes on & off when the main switch or circuit breakers turned on,or power cord is plugged in the wall outlet.

Check for the voltage between A and B is 220 to 240VAC.

Terminal

Check for the voltage between B and C is 15 to 60VDC.

block

Fuse

Check Varistor if the fuse is open.

6.3A

Check for the voltage between G and F terminal of CN214.

DC5V

CN34

(RED)

CN104

(YEL)

CN102

(RED)

CN101

(BLK)

789

t°

1 2

t°

TCJ

t°

10 9 8 7

6 5 4 3

Signal receiving unit

– 15 –

6. SPECIFICATIONS OF ELECTRICAL PARTS

Model RAS-M***G3DV* M07 M10 M13 M16

Fan motor ICF-340WD94-3 or ICF-340WD94-4

Drain pump motor MDP-1401

Float switch FS-1A-31

P.C. board MCC-1643

TA sensor Lead wire length : 328mm Vinyl tube

TC sensor Ø6 size lead wire length : 1000mm Vinyl tube (Black)

TCJ sensor Ø6 size lead wire length : 1000mm Vinyl tube (Red)

– 16 –

RAS-M07,10,13G3DV

7. REFRIGERANT CYCLE DIAGRAM

INDOOR UNIT

Evaporator

Tcj

Multi-blade fan

Connecting pipe Thickness : 0.8mm Ø9.52

RAS-M16G3DV

Connecting pipe Thickness : 0.8mm Ø6.35

Sectional shape of heat insulator

OUTDOOR UNIT

INDOOR UNIT

Evaporator

Tcj

Multi-blade fan

Allowable pipe length

Allowable height difference

Connecting pipe Thickness : 0.8mm Ø12.7

Connecting pipe Thickness : 0.8mm Ø6.35

Allowable pipe length

Allowable height difference

Sectional shape of heat insulator

OUTDOOR UNIT

NOTE : Gas leak check position

Refrigerant flow (Cooling) Refrigerant flow (Heating)

• The allowable pipe length, charge amount of refrigerant, and allowable height difference differ according to the outdoor unit to be combined.

For details, refer to the service manual of the outdoor unit to be combined.

– 17 –

8. CONTROL BLOCK DIAGRAM

Heat Exchanger Sensor (Tcj)

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

Indoor Fan

Motor Control

Indoor

Fan Motor

Power Supply

(From Outdoor Unit)

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation [ ]

Operation Mode Selection

AUTO, COOL, DRY, FAN ONLY

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

ECO

Hi-POWER

COMFORT SLEEP

QUIET

Infrared Rays, 36.7kHz

– 18 –

9. OPERATION DESCRIPTION

9-1. Outline of Air Conditioner Control.............................................................................20

9-2. Operation Description.................................................................................................21

1. Basic operation ..............................................................................................................21

1-1. Operation control ....................................................................................................21

1-2. When power supply is reset....................................................................................22

1-3. Operating mode selection when performing 2-room operation...............................22

1-4. Cooling/Heating operation ......................................................................................23

1-5. AUTO operation......................................................................................................24

1-6. DRY operation ........................................................................................................24

2. Indoor fan motor control .................................................................................................25

3. Capacity control .............................................................................................................28

4. Release protective control by temperature of indoor heat exchanger............................28

5. Drain pump control.........................................................................................................29

6. After-heat elimination .....................................................................................................29

7. Intermittent Operation Control for Indoor Fans of the Indoor Unit at Thermo-off Side in

Heating Operation ..............................................................................................................30

8. Additional Operation.......................................................................................................31

8-1. QUIET mode...........................................................................................................31

8-2. Hi-POWER Mode....................................................................................................31

8-3. ECO mode ..............................................................................................................31

8-4. COMFORT SLEEP mode .......................................................................................32

9. One-Touch Comfort .......................................................................................................32

10. Temporary operation....................................................................................................32

11. Frequency fixed operation (Test run)...........................................................................33

12. Self-Cleaning function ..................................................................................................34

13. Self-Cleaning function release .....................................................................................35

14. Suction temperature correction ....................................................................................35

15. Remote-A or B selection ..............................................................................................36

16. Short Timer ..................................................................................................................36

17. External static pressure settings ..................................................................................37

9-3. Auto Restart Function.................................................................................................38

9-3-1. How to Set the Auto Restart Function .....................................................................38

9-3-2. How to Cancel the Auto Restart Function................................................................39

9-3-3. Power Failure During Timer Operation ....................................................................39

9-4. Remote control............................................................................................................40

9-4-1. Remote control and its functions .............................................................................40

9-4-2. Operation of remote control.....................................................................................40

9-4-3. Name and Functions of Indications on Remote Controller ......................................43

– 19 –

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 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.)

• Indoor fan motor operation control

• LED (Light Emitting Diode) display control

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

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

2.Role of outdoor unit controller

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

• 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

[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.

• 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.

– 20 –

9-2. Operation Description

Item

1. Basic operation

Operation flow and applicable data, etc. Description

1-1. Operation control

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

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

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

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

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

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

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

Selection of

operation conditions

ON/OFF

Remote controller

Control contents of remote controller

•ON/OFF

• Operation select

• Temperature setup

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

•ECO

•ON timer setup

• OFF timer setup

•Hi-POWER

• COMFORT SLEEP

•QUIET

• PRESET

• ONE-TOUCH

Signal receiving

Indoor unit control

Operation command

Serial signal send/receive

Outdoor unit control

Indoor unit

Indoor unit control

• Command signal generating function of indoor unit operation

• Calculation function (temperature calculation)

• Activation compensation function of indoor fan

• Cold draft preventive function

• Timer function

• Indoor heat exchanger release control

Outdoor unit

Outdoor unit control

• Frequency control of inverter output

• Waveform composite function

• Calculation function (Temperature calculation)

• AD conversion function

• Quick heating function

• Delay function of compressor reactivation

• Current release function

• GTr over-current preventive function

• Defrost operation function

Inverter

• Indoor fan motor

•drain pump

• Compressor

• Outdoor fan motor

• 4-way valve

• Pulse motorvalve (P.M.V.)

– 21 –

Item Operation flow and applicable data, etc. Description

1. Basic operation

1-2.When power supply is reset

1) Based on EEPROM data and DIPSW, setting of the indoor fan speed and other setting are loaded. During this loading (approx 30 seconds), operation cannot be accepted.

Air speed (rpm)

1-3. Operating mode selection when performing 2-room operation

1) The outdoor unit operation mode conforms to the instructions of the indoor unit that was pressed first.

2) When combined operation consisting of cooling (dry) and heating, fan and heating, or cleaning operation and heating is performed, operation conforms to the instructions of the indoor unit that was pressed first as shown in the following table.

3) The indoor fan stops for the indoor unit that was pressed last and which instructions are ignored.

4) When three or four indoor units are operated concurrently, the priority is also given to operating mode of the indoor unit which was pressed first as same as the case when two indoor units are operated concurrently.

No. Indoor unit Set operating mode Actual indoor unit operation Actual outdoor unit operation

Pressed first Cooling (dry) Cooling (dry)

Pressed last Cooling (dry) Cooling (dry)

Pressed first Heating Heating

Pressed last Heating Heating

Pressed first Fan only Fan only

Pressed last Fan only Fan only

Pressed first Fan only Fan only

Pressed last Cooling (dry) Cooling (dry)

Pressed first Cooling (dry) Cooling (dry)

Pressed last Fan only Fan only

Pressed first Cooling (dry) Cooling (dry)

Pressed last Heating Fan stopped

Pressed first Heating Heating

Pressed last Cooling (dry) Fan stopped

Pressed first Cleaning operation Cleaning operation

Pressed last Cleaning operation Cleaning operation

Pressed first Cleaning operation Cleaning operation

Pressed last Cooling (dry) Cooling (dry)

Pressed first Cooling (dry) Cooling (dry)

Pressed last Cleaning operation Cleaning operation

Pressed first Cleaning operation Cleaning operation

Pressed last Fan only Fan only

Pressed first Fan only Fan only

Pressed last Cleaning operation Cleaning operation

Pressed first Cleaning operation Cleaning operation

Pressed last Heating Fan stopped

Pressed first Heating Heating

Pressed last Cleaning operation Fan stopped

Cooling

Heating

Stopped

Cooling

Heating

Stopped

Cooling

Stopped

Heating

– 22 –

Item Operation flow and applicable data, etc. Description

1. Basic operation

1-4. Cooling/Heating operation

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

1) Receiving the operation ON signal of the remote controller, the cooling or heating operation signal starts being transferred from 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 drain pump according to the “5. Drain pump control”.

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.

Operation On

Indoor unit control

Sending of operation command signal

Outdoor unit control

Setup of remote controller

Indoor fan motor control / drain pump

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

– 23 –

Item Operation flow and applicable data, etc. Description

1. Basic operation

1-5. AUTO operation

Remote controller

command

• COOL/HEAT operation mode is automatically selected by Ta, Ts and To for operation.

• The operation is performed as

AUTO

+1.0

Ts +

(°C)

• α is corrected according to the outside temperature.

-1.0

shown in the following figure according to Ta value at the first time only. (In the range of Ts + α –1 < Ta < Ts + α + 1, Cooling thermo. OFF (Fan)/Setup air volume operation continues.)

Cooling thermo. OFF (Fan only)

•

Setup air volume

Control outline

Cooling operation

Heating operation

Ta: Room temp. Ts: Setup temp. To: Outside temp.

Outside temp.

No To 0K

To ≥ 24°C –1K

24 > To ≥ 18°C 0K

To < 18°C +1K

To error 0K

Correction value (

α)

1) The judgment of selecting COOL/HEAT is carried out as shown below. When +1.5 exceeds against Tsh 10 minutes and after thermo. -OFF, heating operation (Thermo. OFF) exchanges to cooling operation. Description in the parentheses shows an example of cooling ON/OFF.

(°C)

+1.5

Tsc Tsh

-1.5

Cooling OFF

Cooling

(Cooling ON)

Heating

When –1.5 lowers against Tsc 10 minutes and after thermo. OFF, cooling operation (Thermo. OFF) exchanges to heating operation.

2) For the automatic capacity control after judgment of cooling/heating, see Item 4.

3) For temperature correction of room temp. control in automatic heating, see Item 3.

k = deg

Tsc: Setup temp. in cooling

operation

Tsh: Setup temp. in heating

operation + temp. correction of room temp. control

1-6. DRY operation

DRY operation is aimed to dehumidification. In order to prevent lowering of the room temperature,

• Indoor fan speed is fixed to cooling L tap.

• Cooling capacity is restricted to low. When the room temperature is

lower than the setup temperature, the compressor is turned off.

– 24 –

Item Operation flow and applicable data, etc. Description

2. Indoor fan motor control

1) Operation with (HH), (H+), (H), (L+), (L) or [AUTO] mode is carried out by the command from the remote controller.

2) When the air speed mode [AUTO] is selected, the air speed varies by the difference between Ta and Ts.

<COOL>

Ta (˚C)

+3.0

+2.5

+2.0

+1.5

+1.0

+0.5

Tsc

–0.5

HH (HH)

H+ (HH)

H (HH)

L+ (H+)

L (H)

L (H) L (L+)

A B C

F G

• Controlling operation in case when thermo of remote controller works

is same as a case when thermo of the body works.

• If the air speed has been changed once, it is not changed for

3 minutes. However when the air volume is exchanged, the air speed changes.

• When cooling operation has started, select a downward slope for the

air speed, that is, the high position.

• If the temperature is just on the difference boundary, the air speed

does not change.

• Mode in the parentheses indicates one in automatic cooling

operation.

HH > H+ > H > L+ > L > UL

<HEAT>

Ta (˚C)

(–0.5) –1.0

Tsh

(+0.5) +1.0

(+1.0) +2.0

(+1.5) +3.0

(+2.0) +4.0

L (L+)

L+ (H)

H (H+)

H+ (HH)

HH (HH)

Value in the parentheses indicates one when thermostat of the remote controller works.

Value without parentheses indicates one when thermostat of the body works.

• If the air speed has been changed once, it is not changed for 1

minute. However when the air speed is exchanged, the air speed changes.

• When heating operation has started, select an upward slope for the

air speed, that is, the high position.

• If the temperature is just on the difference boundary, the air speed

does not change.

• Mode in the parentheses indicates one in automatic heating

operation.

•In Tc ≥ 60°C, the air speed increases by 1 step.

Tc: Indoor heat

exchanger sensor temperature

– 25 –

Item Operation flow and applicable data, etc. Description

2. Indoor fan motor control

Revolution speed of indoor fan (rpm)



M07G3DV, M10G3DV

tap COOL HEAT

F1 HH 1020 1120 1200 1260

F2 HH 1020 1120 1200 1260

F3 H+ 960 1020 1120 1160

F4 H+ 960 1020 1120 1160

F5 H 880 940 1020 1040

F6 H 880 940 1020 1040

F7 L+ 820 870 940 980

F8 L+ 820 870 940 980

F9 L 740 780 850 890

FA L 740 780 850 890

FB 730 730 770 820

FC 730 730 770 820

FD LL LL 610 610 610 610



M13G3DV

tap COOL HEAT

F1 HH 1120 1160 1240 1300

F2 HH 1120 1160 1240 1300

F3 H+ 1000 1040 1140 1200

F4 H+ 1000 1040 1140 1200

F5 H 920 970 1040 1120

F6 H 920 970 1040 1120

F7 L+ 830 870 930 980

F8 L+ 830 870 930 980

F9 L 740 780 840 870

FA L 740 780 840 870

FB 730 730 770 820

FC 730 730 770 820

FD LL LL 610 610 610 610

External static pressure selection

10Pa 20Pa 35Pa 45Pa

External static pressure selection

10Pa 20Pa 35Pa 45Pa



M16G3DV

tap COOL HEAT

F1 HH 1020 1120 1220 1260

F2 HH 1020 1120 1220 1260

F3 H+ 960 970 1100 1140

F4 H+ 960 970 1100 1140

F5 H 810 810 960 1020

F6 H 810 810 960 1020

F7 L+ 730 750 810 960

F8 L+ 720 750 810 960

F9 L 660 700 760 800

FA L 630 670 720 760

FB 630 630 660 680

FC 630 630 640 660

FD LL LL 550 550 550 550

External static pressure selection

10Pa 20Pa 35Pa 45Pa

3) In heating operation, the mode changes to [LL] if thermostat is turned off.

4) If Ta ≥ 25°C when heating operation has started and when defrost operation has been cleared, the air conditioner operates with (H) mode or higher mode for 1 minute after Tc entered in E zone of cool air discharge preventive control.

Tcj: Indoor heat exchanger sensor temperature

– 26 –

Item Operation flow and applicable data, etc. Description

2. Indoor fan motor control

5) Self-clean operation

When performing self-clean operation after stopping the cooling operation, the mode becomes LL (M07, M10, M13), L (M16).

Cool air discharge preventive control

1) In heating operation, the indoor fan is controlled based on the detected temperature of Tc sensor or Tcj sensor. As shown below, the upper limit of the revolution frequency is restricted.

However B zone is assumed as C zone for 6 minutes and after when the compressor activated. In defrost operation, the control value of Tc is shifted by 6°C.

(˚C)

Tcj

20 16

OFF

E zone

D zone

C zone B zone

A zone

[Self-clean ] is displayed.

In D and E zones, the priority is given to air volume selection setup of remote controller. In A zone while thermo is

ON, [PRE-HEAT (Heating ready)] is displayed.

– 27 –

Item Operation flow and applicable data, etc. Description

3. Capacity control

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.

Remote controller

Set temp. (Ts)

Ts –Ta

Correction of Hz signal

Detection of electromotive force

of compressor motor winding

Detection of motor speed and rotor position

Correction value of Hz signal  Operating Hz

Inverter output change

Change of compressor speed

Indoor unit

Room temp. (Ta)

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 is 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

4. Release protective control by temperature of indoor heat exchanger

Freeze preventive control (Low temperature release)

1) The cooling operation (including Dry operation) is performed as follows based on the detected temperature of Tc sensor or Tcj sensor.

When [J] zone is detected for 6 minutes (Following figure), the commanded frequency is decreased from the real operation frequency.

After then the commanded frequency changes every 30 seconds while operation is performed in [J] zone.

In [K] zone, time counting is interrupted and the operation is held.

When [ I ] zone is detected, the timer is cleared and the operation returns to the normal operation.

If the commanded frequency becomes S0 because the operation continues in [J] zone, the return temperature A is raised from 7°C to 12°C until [ I ] zone is detected and the indoor fan operates with [L] mode.

(˚C)

Tcj: Indoor heat exchanger sensor temperature

– 28 –

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