Toshiba RAS-M16SKV-E, RAS-M10SKCV-E, RAS-M07SKV-E, RAS-M10SKV-E, RAS-M16SKCV-E SERVICE MANUAL

SERVICE MANUAL

Indoor Unit

<High Wall, Heat Pump Type>

RAS-M07SKV-E

RAS-M10SKV-E

RAS-M13SKV-E

RAS-M16SKV-E

<High Wall, Cooling Type>

RAS-M10SKCV-E

RAS-M13SKCV-E

RAS-M16SKCV-E

R410A

FILE NO. SVM-07034-2

SPLIT TYPE

Revised May, 2009

CONTENTS

1.	SAFETY PRECAUTIONS ..........................................................................	3
2.	SPECIFICATIONS .....................................................................................	5
3.	REFRIGERANT R410A .............................................................................	8
4.	CONSTRUCTION VIEWS ........................................................................	16
5.	WIRING DIAGRAM ..................................................................................	17
6.	SPECIFICATIONS OF ELECTRICAL PARTS .........................................	19
7.	REFRIGERANT CYCLE DIAGRAM ........................................................	20
8.	CONTROL BLOCK DIAGRAM ................................................................	21
9.	OPERATION DESCRIPTION ...................................................................	23
10.	INSTALLATION PROCEDURE ................................................................	47
11.	HOW TO DIAGNOSE THE TROUBLE ......................................................	55
12.	HOW TO REPLACE THE MAIN PARTS ...................................................	74
13.	EXPLODED VIEWS AND PARTS LIST ...................................................	83

– 2 –

1. SAFETY PRECAUTIONS

For general public use

Power supply cord of outdoor unit shall be more than 1.5 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 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 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.

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.

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 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.

–3 –

•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.

WARNING

•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.

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 antifreeze heater locally for a safe installation of the air conditioner.

For details, contact the dealer.

– 4 –

Revised-2

2. Specifications

2-1. Combined Outdoor Unit

The outdoor units, which can be combined with M**SKV-E series indoor unit are as described below:

2-2-1. Heatpump type

	Outdoor	Combined outdoor unit			Indoor unit model name
	unit type	model name		M16SKV-E	M13SKV-E	M10SKV-E	M07SKV-E
	2-room Multi	RAS-M14GAV-E		X			X
	outdoor unit	RAS-M18GAV-E					X
	3-room Multi	RAS-3M18SAV-E					X
	outdoor unit	RAS-3M26GAV-E1
	4-room Multi	RAS-4M23SAV-E					X
	outdoor unit	RAS-4M27GAV-E1
				: Combination available
			X	: Combination unavailable
2-2-2. Cooling only type
	Outdoor	Combined outdoor unit		Indoor unit model name
	unit type	model name	M16SKCV-E		M13SKCV-E	M10SKCV-E
	2-room Multi	RAS-M14GACV-E		X
	outdoor unit	RAS-M18GACV-E
	3-room Multi	RAS-3M18SACV-E
	outdoor unit	RAS-3M23GACV-E
	4-room Multi	RAS-4M23SACV-E
	outdoor unit	RAS-4M27GACV-E
				: Combination available
			X	: Combination unavailable

This service manual describes about M**SKV-E series indoor units, RAS-M07SKV-E,RAS-M10SKV-E, RAS-M13SKV-E,RAS-M16SKV-E,RAS-M10SKCV-E,RAS-M13SKCV-E and RAS-M16SKCV-E only. For the multi outdoor unit to be combined, refer to the service manual.

	Outdoor unit		File name
	Heat Pump Model	Cooling only model
	RAS-M14GAV-E	RAS-M14GACV-E	A05-009-1
	RAS-M18GAV-E	RAS-M18GACV-E
	RAS-3M18SAV-E	RAS-3M18SACV-E	A06-013
		RAS-3M23GACV-E	A05-014-1
	RAS-4M23SAV-E	RAS-4M23SACV-E	A06-014
	RAS-3M26GAV-E,RAS-4M27GAV-E	RAS-4M27GACV-E	A05-011-1

– 5 –

																	Revised-2
Specifications
Unit model	Indoor				RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E, RAS-M16SKV-E
	Outdoor											1
Cooling capacity				(kW)								1
Cooling capacity range				(kW)								1
Heating capacity				(kW)								1
Heating capacity range				(kW)								1
Power supply								220~240V-1Ph-50Hz / 220V-1Ph-60Hz
Electric	Indoor		Unit model		RAS-M07SKV-E				RAS-M10SKV-E				RAS-M13SKV-E			RAS-M16SKV-E
characteristic			Running current	(A)	0.21-0.19				0.21-0.19				0.21-0.19				0.21-0.19
			Power consumption	(W)		35				35			35					30
			Power factor	(%)		75				75			75					65
	Outdoor		Operation mode		Cooling		Heating		Cooling		Heating		Cooling	Heating		Cooling			Heating
			Running current	(A)	1		1		1		1		1		1		1		1
			Power consumption	(W)	1		1		1		1		1		1		1		1
			Power factor	(%)	1		1		1		1		1		1		1		1
			Starting current	(A)	1		1		1		1		1		1		1		1
COP(Cooling/Heatin	g)				1		1		1		1		1		1		1		1
Operating	Indoor		Unit model		RAS-M07SKV-E				RAS-M10SKV-E				RAS-M13SKV-E			RAS-M16SKV-E
noise	(Cooling/		High			38/38				38/39			39/40					45/45
dB(A)	Heating)		Medium			33/33				33/34			33/34					40/40
			Low			26/28				26/28			26/28					30/31
	Outdoor		Cooling										1
			Heating									1
Indoor unit	Unit model				RAS-M07SKV-E				RAS-M10SKV-E				RAS-M13SKV-E			RAS-M16SKV-E
	Dimension		Height			275				275			275					275
	(mm)		Width			790				790			790					790
			Depth			205				205			205					205
	Net weight			(kg)		9				9			9					9
	Fan motor output			(W)		20				20			20					30
	Air flow rate		(m3/h) (Cooling/Heating)			8.6/9.5				8.6/9.5			9.4/10.5				11.5/12.4
Outdoor unit	Dimension		Height										1
	(mm)		Width									1
			Depth									1
	Net weight			(kg)								1
	Compressor		Motor output	(W)								1
			Type									1
			Model									1
	Fan motor output			(W)								1
	Air flow rate		(m3/h) (Cooling/Heating)									1
	Type										Flare connection
Piping	Indoor unit		Unit model		RAS-M07SKV-E				RAS-M10SKV-E				RAS-M13SKV-E			RAS-M16SKV-E
connection						6.35				6.35			6.35					6.35
						9.52				9.52			9.52					12.7
	Outdoor unit		Liquid side										1
			Gas side									1
	Maximum length (per unit)			(m)								1
	Minimum length (per unit)			(m)								1
	Maximum length (total)			(m)								1
	Maximum chargeless length			(m)								1
	Additional refriderant											1
	Maximum height difference			(m)								1
	Name of refrigerant											R410A
	Weight			(kg)								1
Wiring connection			Power supply							3 Wires : includes earth
			Interconnection							4 Wires : includes earth
Usable temperature range		(°	Indoor (Cooling/Heating)							21 - 32/ -
			Outdoor (Cooling/Heating)									1
Accessory	Indoor unit		Installation plate									1
			Wireless remote control									1
			Remote control holder									1
			Pan head wood screw								2( 3.1 x 16L)
			Super Oxi Deo filter									1
			Super Sterilizer filter									1
			Battery									2
			Mounting screw								6( 4 x 25L)
			Owner's manual									1
			Installation manual									1

1 : Refer to the service manual of the multi outdoor unit to be combined.

Note

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

– 6 –

Revised-2

Unit model	Indoor			RAS-M10SKCV-E, RAS-M13SKCV-E, RAS-M16SKCV-E
	Outdoor					1
Cooling capacity			(kW)			1
Cooling capacity range			(kW)			1
Heating capacity			(kW)			−
Heating capacity range			(kW)			−
Power supply				220~240V-1Ph-50Hz / 220V-1Ph-60Hz
Electric	Indoor	Unit model		RAS-M10SKCV-E		RAS-M13SKCV-E		RAS-M16SKCV-E
characteristic		Running current	(A)	0.21-0.19		0.21-0.19			0.21-0.19
		Power consumption	(W)	35		35			30
		Power factor	(%)	75		75			65
	Outdoor	Operation mode		Cooling					Heating
		Running current	(A)	1					−
		Power consumption	(W)	1					−
		Power factor	(%)	1					−
		Starting current	(A)	1					−
COP(Cooling/Heatin	g)			1					−
Operating	Indoor	Unit model		RAS-M10SKCV-E		RAS-M13SKCV-E		RAS-M16SKCV-E
noise	(Cooling/	High		38/-		39/-			45/-
dB(A)	Heating)	Medium		33/-		33/-			40/-
		Low		26/-		26/-			30/-
	Outdoor	Cooling				1
		Heating				−
Indoor unit	Unit model			RAS-M10SKCV-E		RAS-M13SKCV-E		RAS-M16SKCV-E
	Dimension	Height		275		275			275
	(mm)	Width		790		790			790
		Depth		205		205			205
	Net weight		(kg)	9		9			9
	Fan motor output		(W)	20		20			30
	Air flow rate	(m3/h) (Cooling/Heating)		8.6/-		9.4/-			11.5/-
Outdoor unit	Dimension	Height				1
	(mm)	Width				1
		Depth				1
	Net weight		(kg)			1
	Compressor	Motor output	(W)			1
		Type				1
		Model				1
	Fan motor out	put	(W)			1
	Air flow rate	(m3/h) (Cooling/Heating)				1
	Type					Flare connection
Piping	Indoor unit	Unit model		RAS-M10SKCV-E		RAS-M13SKCV-E			RAS-M16SKCV-E
connection				6.35		6.35			6.35
				9.52		9.52			12.7
	Outdoor unit	Liquid side				1
		Gas side				1
	Maximum leng	th (per unit)	(m)			1
	Minimum length (per unit)		(m)			1
	Maximum length (total)		(m)			1
	Maximum chargeless length		(m)			1
	Additional refriderant					1
	Maximum height difference		(m)			1
	Name of refrigerant					R410A
	Weight		(kg)			1
Wiring connection		Power supply			3 Wires : includes earth
		Interconnection			4 Wires : includes earth
Usable temperature range (°C)		Indoor (Cooling/Heating)			21 - 32/ -
		Outdoor (Cooling/Heating)				1
Accessory	Indoor unit	Installation plate			1
		Wireless remote control			1
		Remote control holder			1
		Pan head wood screw				2( 3.1 x 16L)
		Super Oxi Deo filter			1
		Super Sterilizer filter			1
		Battery			2
		Mounting screw				6( 4 x 25L)
		Owner's manual			1
		Installation manual			1

*1 : Refer to the service manual of the multi outdoor unit to be combined.

Note

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

– 7 –

3. REFRIGERANT R410A

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

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

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

3-1. Safety During Installation/Servicing

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

3-2. Refrigerant Piping Installation

3-2-1. Piping Materials and Joints Used

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

1.Copper Pipes

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

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

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

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

– 8 –

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	Reference outer diameter of	Minimum joint thickness
		copper pipe jointed (mm)	(mm)
	1/4	6.35	0.50
	3/8	9.52	0.60
	1/2	12.70	0.70
	5/8	15.88	0.80

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

– 9 –

d) Flare Processing

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

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

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

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

ØD

A

Fig. 3-2-1 Flare processing dimensions

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

		Outer				A (mm)
	Nominal		Thickness
		diameter			Flare tool for R410A	Conventional flare tool
	diameter		(mm)
		(mm)
					clutch type	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
		Outer				A (mm)
	Nominal		Thickness
		diameter			Flare tool for R22	Conventional flare tool
	diameter		(mm)
		(mm)
					clutch type	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	Outer diameter	Thickness		Dimension (mm)					Flare nut width
diameter	(mm)	(mm)	A		B	C		D	(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	16.6		16.0	12.9		23	26
5/8	15.88	1.0	19.7		19.0	16.0		25	29

– 10 –

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

Nominal	Outer diameter								Thickness									Dimension (mm)												Flare nut width
diameter		(mm)									(mm)						A		B		C				D					(mm)
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							16.2			16.0	12.9					20					24
5/8	15.88								1.0							19.7			19.0	16.0					23					27
3/4	19.05								1.0							23.3			24.0	19.2					34					36
		to	46˚
		45˚
							B			A													C			D

				43˚	to
					45˚

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	Outer diameter	Tightening torque	Tightening torque of torque
				wrenches available on the market
	diameter	(mm)	N•m (kgf•cm)
				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)

– 11 –

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		Conventional air-water
				air-water heat pump installation		heat pump installation
	No.	Used tool	Usage
				Existence of	Whether conven-	Whether new equipment
				new equipment	tional equipment	can be used with
				for R410A	can be used	conventional refrigerant
	1	Flare tool	Pipe flaring	Yes	*(Note 1)	¡
		Copper pipe gauge for	Flaring by		*(Note 1)	*(Note 1)
	2	adjusting projection		Yes
			conventional flare tool
		margin
	3	Torque wrench	Connection of flare nut	Yes	×	×
		(For Ø12.7)
	4	Gauge manifold	Evacuating, refrigerant	Yes	×	×
	5	Charge hose	charge, run check, etc.
	6	Vacuum pump adapter	Vacuum evacuating	Yes	×	¡
	7	Electronic balance for	Refrigerant charge	Yes	×	¡
		refrigerant charging
	8	Refrigerant cylinder	Refrigerant charge	Yes	×	×
	9	Leakage detector	Gas leakage check	Yes	×	¡
	10	Charging cylinder	Refrigerant charge	(Note 2)	×	×

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

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

General tools (Conventional tools can be used.)

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

1.Vacuum pump

Use vacuum pump by attaching vacuum pump adapter.

2.Torque wrench (For Ø6.35, Ø9.52)

3.Pipe cutter

4.	Reamer	9.	Hole core drill (Ø65)
5.	Pipe bender	10.	Hexagon wrench
6.	Level vial		(Opposite side 4mm)
7.	Screwdriver (+, –)	11.	Tape measure
8.	Spanner or Monkey wrench	12.	Metal saw

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

1.	Clamp meter	3.	Insulation resistance tester
2.	Thermometer	4.	Electroscope

– 12 –

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.

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

When the compound gauge’s pointer has indicated –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.

(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.

(Water heat

(Outdoor unit)

exchanger unit)

		Opened
	Refrigerant cylinder
	(with siphon)
	Check valve	Opened
	Opened
	Open/close	Closed
	valve for charging
		Service port
	Electronic balance for refrigerant charging

Fig. 3-4-1 Configuration of refrigerant charging

– 13 –

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	Gauge manifold
OUTDOOR unit	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 Refrigerant

Electronic

balance

Siphon

Fig. 3-4-2

3-5. Brazing of Pipes

3-5-1. Materials for Brazing

1.Silver brazing filler

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

2.Phosphor bronze brazing filler

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

3.Low temperature brazing filler

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

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

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

3-5-2. Flux

1.Reason why flux is necessary

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

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

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

– 14 –

2.Characteristics required for flux

•Activated temperature of flux coincides with the brazing temperature.

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

•It is easy to remove slag after brazing.

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

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

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

3.Types of flux

•Noncorrosive flux

Generally, it is a compound of borax and boric acid.

It is effective in case where the brazing temperature is higher than 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

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.

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.

M Flow meter

Stop valve

Nitrogen gas cylinder

From Nitrogen cylinder

Pipe Nitrogen gas

Rubber plug

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

– 15 –

4. CONSTRUCTION VIEWS

RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E, RAS-M16SKV-E RAS-M10SKCV-E, RAS-M13SKCV-E, RAS-M16SKCV-E

790

Front panel	Air filter		Air inlet

		275
63
7	48	Heat exchanger

Revised-2

205

63

48

7

Knock out system

Knock out system

49

62 69

116	480	193
	Installation plate hanger

157

56 19 Wireless remote controller

Installation plate hanger					Drain hose (0.50m)
	Connecting pipe (0.35m)				Connecting pipe (0.40m)			125
(For 07,10,13 series; Flare		9.52mm)			(Flare	6.35mm)
(For 16 series; Flare		12.7mm)						26
	84.5		235	621		84.5	63
				235			Remote controller holder
			215	215
				Minimum	more
		Hanger		distance
					65 or
				to ceiling
	Minimum						45
						Minimum
	distance
						distance
	to wall
275						to wall	190
	170 or more					170 or more
	40						40
		Hanger			Hanger
	84.5	150	160.5	160.5	150	84.5
		Center line			Installation plate outline

– 16 –

Revised-2

5. WIRING DIAGRAM

5-1. RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E,

RAS-M10SKCV-E, RAS-M13SKCV-E

– 17 –

Revised-2

5-2. RAS-M16SKV-E

RAS-M16SKCV-E

– 18 –

Revised-2

6. SPECIFICATIONS OF ELECTRICAL PARTS

Indoor Unit

No.		Parts name	Type	Specifications
	Fan motor	M07SKV-E, M10SKV-E,	AFS-220-20-4AR	AC240V, 20W
1		M13SKV-E, M10SKCV-E,
	(for indoor)	M13SKCV-E
		M16SKV-E, M16SKCV-E	ICF-340-30-2B	DC 340V, 30W
2	Room temp. sensor (TA-sensor)		( − )	10kΩ at 25°C
3	Heat exchanger temp. sensor (TC-sensor)		( − )	10kΩ at 25°C
4	Louver motor		MP24Z3T	Output (Rated) 1W, 16 poles, DC12V

– 19 –

Revised-2

7. REFRIGERANT CYCLE DIAGRAM

P Pressure measurement

Gauge attaching port

Vacuum pump connecting port

Deoxidized copper pipe Outer dia. : 9.52mm Thickness : 0.8mm

	INDOOR UNIT	T1	Temp. measurement
	Indoor heat		TCJ
	exchanger
		TC	heightAllowable	10m:difference	lengthpipeAllowable
	Cross flow fan	TA				Max.	: 1
						Min.	: 1
	Deoxidized copper pipe					Chargeless : 1
	Outer dia. : 6.35mm					Charge : 1
	Thickness : 0.8mm
	Sectional shape
	of heat insulator

M16SKV-E, M16SKCV-E

Deoxidized copper pipe

Outer dia. : 12.7mm

Thickness : 0.8mm

1 : Refer to the service manual of multi outdoor unit to be combined.

– 20 –

Revised-2

8. CONTROL BLOCK DIAGRAM

8-1. Indoor Unit

RAS-M07SKV-E, RAS-M10SKV-E, RAS-M13SKV-E, RAS-M16SKV-E

	Heat Exchanger Sensor (Tcj)		M.C.U.	Indoor Unit Control Unit
		Functions			Louver
	Heat Exchanger Sensor (Tc)				Motor
	Room Temperature Sensor (Ta)	• Cold draft preventing Function
		• 3-minute Delay at Restart for Compressor			Louver Motor
					Drive Control
	Infrared Rays Signal Receiver
		• Fan Motor Starting Control
	and Indication				Indoor Fan
		• Processing			Motor Control
	Initializing Circuit	(Temperature Processing)
	Clock Frequency	• Timer			Indoor
					Fan Motor
	Oscillator Circuit	• Serial Signal Communication
		• Clean Function
	Power Supply
	Circuit

Converter (D.C circuit)

	Noise Filter		Serial Signal Transmitter/Receiver
From Outdoor Unit
	220-240V ~50Hz		Serial Signal Communication
	220V ~60Hz		(Operation Command and Information)

Remote Controller

Infrared Rays, 36.7kHz

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

COMFORT SLEEP

QUIET

– 21 –

	RAS-M10SKCV-E, RAS-M13SKCV-E, RAS-M16SKCV-E
	Heat Exchanger Sensor (Tcj)	M.C.U.	Indoor Unit Control Unit
				Louver
		Functions
	Heat Exchanger Sensor (Tc)			Motor
	Room Temperature Sensor (Ta)	• Cold draft preventing Function
		• 3-minute Delay at Restart for Compressor		Louver Motor
				Drive Control
	Infrared Rays Signal Receiver
		• Fan Motor Starting Control
	and Indication			Indoor Fan
		• Processing		Motor Control
	Initializing Circuit	(Temperature Processing)
	Clock Frequency	• Timer		Indoor
				Fan Motor
	Oscillator Circuit	• Serial Signal Communication
		• Clean Function
	Power Supply
	Circuit

Converter (D.C circuit)

	Noise Filter		Serial Signal Transmitter/Receiver
From Outdoor Unit
	220-240V ~50Hz		Serial Signal Communication
	220V ~60Hz		(Operation Command and Information)

Remote Controller

Infrared Rays, 36.7kHz

REMOTE CONTROLLER

Operation (START/STOP)

Operation Mode Selection

AUTO, COOL, DRY, Fan only

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

COMFORT SLEEP

QUIET

– 22 −

9. OPERATION DESCRIPTION

9-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air conditioner, which uses AC or DC motor for the indoor for motor and the outdoor fan motor. And the capacityproportional control compressor 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

2.Role of outdoor unit controller

•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

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 (Heat Pump model only)

•Whether protective circuit operates

When no signal is received from the outdoor unit controller, it is assumed as a trouble.

Operations followed to judgment of serial signal from indoor side.

− 23 −

9-2.	Operation Description
	1.	Basic operation ...........................................................................................................	25
		1. Operation control ...................................................................................................	25
		2. Operating mode selection when performing 2-room operation .........................	26
		3. Cooling/Heating operation .....................................................................................	26
		4. AUTO operation ....................................................................................................	27
		5. DRY operation .......................................................................................................	27
	2.	Indoor fan motor control .............................................................................................	28
	3.	Capacity control ..........................................................................................................	30
	4.	Release protective control by temperature of indoor heat exchanger........................	31
	5.	Louver control .............................................................................................................	32
		1) Louver position .......................................................................................................	32
		2) Air direction adjustment .........................................................................................	32
		3) Swing .....................................................................................................................	32
	6.	ECO operation ............................................................................................................	33
	7.	Temporary operation ...................................................................................................	34
	8.	Self-Cleaning function ................................................................................................	35
	9.	Selt-Cleaning function release ...................................................................................	36
	10.	Remote-A or B selection ............................................................................................	37
	11.	QUIET mode .............................................................................................................	38
	12.	COMFORT SLEEP mode .........................................................................................	38
	13.	Short Timer ................................................................................................................	38
	14.	One-Touch Comfort ..................................................................................................	39
	15.	Hi-POWER Mode ......................................................................................................	39
	16.	FILTER Indicator ...............................................................................................	39
9-3.	Auto Restart Function................................................................................................		40
	9-3-1. How to Set the Auto Restart Function .............................. ........................................		40
	9-3-2. How to Cancel the Auto Restart Function ................................................................		41
	9-3-3. Power Failure During Timer Operation ...................................................................		41
9-4. Remote Controller and Its Fuctions ....................................................................			42
	9-4-1. Parts Name of Remote Controller .............................................................................		42
	9-4-2. Operation of remote control ......................................................................................		42
	9-4-3. Name and Functions of Indications on Remote Controller .......................................		45

– 24 −

Item

Operation flow and applicable data, etc.

Description

1. Basic 1. Operation control

operation

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.

Remote controller

Selection of operation conditions

ON/OFF

Control contents of remote controller

•ON/OFF

•Operation select

•Temperature setup

•Air direction

•Swing

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

• ECO	∙ COMFORT SLEEP
• ON timer setup	∙ QUIET
• OFF timer setup	∙ PRESET
• Hi-POWER	∙ ONE-TOUCH

Indoor unit

	Signal receiving			Indoor unit control
				• Command signal generating function of
	Indoor unit control			indoor unit operation		• Indoor fan motor
				• Calculation function (temperature calculation)
						• Louver motor
				• Activation compensation function of indoor fan
	Operation command
				• Cold draft preventive function
				• Timer function
	Serial signal send/receive			• Indoor heat exchanger release control

Outdoor unit

~

Serial signal send/receive

Outdoor unit control

Inverter

• Frequency control of inverter output

Outdoor unit control

• Waveform composite function

• Calculation function

• Compressor

(Temperature calculation)

• Outdoor fan motor

• AD conversion function

• 4-way valve

• Quick heating function

• Pulse motor valve

• Delay function of compressor reactivation

(P.M.V.)

• Current release function

• GTr over-current preventive function

• Defrost operation function

– 25 –

Item	Operation flow and applicable data, etc.	Description
1. Basic	2. Operating mode selection when performing 2-room operation
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
	1	Pressed first	Cooling (dry)	Cooling (dry)	Cooling
		Pressed last	Cooling (dry)	Cooling (dry)
	2	Pressed first	Heating	Heating	Heating
		Pressed last	Heating	Heating
	3	Pressed first	Fan only	Fan only	Stopped
		Pressed last	Fan only	Fan only
	4	Pressed first	Fan only	Fan only	Cooling
		Pressed last	Cooling (dry)	Cooling (dry)
	5	Pressed first	Cooling (dry)	Cooling (dry)	Cooling
		Pressed last	Fan only	Fan only
	6	Pressed first	Cooling (dry)	Cooling (dry)	Cooling
		Pressed last	Heating	Fan stopped
	7	Pressed first	Heating	Heating	Heating
		Pressed last	Cooling (dry)	Fan stopped
	8	Pressed first	Cleaning operation	Cleaning operation	Stopped
		Pressed last	Cleaning operation	Cleaning operation
	9	Pressed first	Cleaning operation	Cleaning operation	Cooling
		Pressed last	Cooling (dry)	Cooling (dry)
	10	Pressed first	Cooling (dry)	Cooling (dry)	Cooling
		Pressed last	Cleaning operation	Cleaning operation
	11	Pressed first	Cleaning operation	Cleaning operation	Stopped
		Pressed last	Fan only	Fan only
	12	Pressed first	Fan only	Fan only	Stopped
		Pressed last	Cleaning operation	Cleaning operation
	13	Pressed first	Cleaning operation	Cleaning operation	Stopped
		Pressed last	Heating	Fan stopped
	14	Pressed first	Heating	Heating	Heating
		Pressed last	Cleaning operation	Fan stopped

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

Operation On			Setup of remote controller
Indoor unit control			Indoor fan motor control / Louver control

Sending of operation command signal

Compressor revolution control / Outdoor fan motor control / 4-way valve control Outdoor unit control [In cooling operation: OFF, In heating operation: ON]

Pulse motor valve control

– 26 –