Toshiba RAS-M10SKCV, RAS-M22NKCV1, RAS-M22SKCV, RAS-4M26SACV, RAS-M13SKCV SERVICE MANUAL

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FILE NO.A07-007

Revised 1: Jul., 2008

SERVICE MANUAL

AIR-CONDITIONER

SPLIT TYPE

RAS-M10SKCV, RAS-M13SKCV,

RAS-M16SKCV, RAS-M22SKCV,

RAS-M22NKCV1

/ RAS-4M26SACV

R410A

PRINTED IN JAPAN, Jul., 2008 ToMo

CONTENTS

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

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

3. REFRIGERANT R410A ........................................................................... 13

4. CONSTRUCTION VIEWS ........................................................................ 21

5. WIRING DIAGRAM.................................................................................. 25

6. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 29

7. REFRIGERANT CYCLE DIAGRAM ........................................................ 30

8. CONTROL BLOCK DIAGRAM................................................................ 32

9. OPERATION DESCRIPTION ................................................................... 34

10. INSTALLATION PROCEDURE ................................................................ 60

11. HO W TO DIA GNOSE THE PROBLEM..................................................... 84

12. HO W TO REPLA CE THE MAIN P ARTS................................................. 112

13. EXPLODED VIEWS AND PARTS LIST ................................................. 134

1. SAFETY PRECAUTIONS

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 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 higher than that of refr igerant 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.

• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.

– 3 –

• 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

• 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 perf ormed 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. Inappropriate grounding may cause electric shock.

• Conform to the regulations of the local electric company when wiring the power supply.

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 par ts 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 problem 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 –

2. SPECIFICATIONS

The indoor and outdoor units that can be used in combination are shown in the tables below.

Table of models that can be connected

Type

Cooling-only

Outdoor unit

RAS-4M26SACV

Indoor unit RAS-

M10SKCV M13SKCV M16SKCV M22NKCV1 M22SKCV

M10SDCV M13SDCV M16SDCV M22SDCV —

NOTES

1-room connection is not an option for the indoor units (you cannot connect only one indoor unit). Be sure to connect indoor units in two rooms or more.

The contents noted in this service manual limit the indoor units to the RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV and RAS-M22NKCV1.

For other indoor units that can also be used in combination, see the service manual of each indoor unit.

Indoor unit

RAS-M10SDCV

RAS-M13SDCV

RAS-M16SDCV

File No.

A07-002

RAS-M22SDCV

– 5 –

2-1. Specifications

<Cooling only Models> RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22NKCV1 / RAS-4M26SACV

Unit model Cooling capacity (kW)

Cooling capacity range (kW) Heating capacity (kW) Heating capacity range (kW) Power supply

Electric characteristics

COP (Cooling)

Operating noise

Indoor unit Depth (mm)

Outdoor unit

Piping connection

Wiring connection Usable

temperature range

Accessory

Indoor Outdoor

Unit model

Indoor

Total Power consumption (W)

Indoor (Cooling/Heating)

Outdoor Unit model

Dimension Width (mm) Net weight (kg)

Fan motor output (W) Air flow rate (Cooling/Heating) (m³/h)

Dimension Width (mm) Net weight (kg) Compressor Type Fan motor output (W)

Air flow rate (m³/h) Type

Indoor unit Liquid side

Outdoor unit

Maximum length (per unit) (m) Minimum length (per unit) (m) Maximum length (total) (m) Maximum chargeless length Additional refrigerant Maximum height difference (m) Name of refrigerant Weight (kg)

Power supply Interconnection Indoor (Cooling/Heating) (°C) Outdoor (Cooling/Heating) (°C)

Indoor unit

Outdoor unit

Running current (A) Power consumption (W) Power factor (%) Operation mode Running current (A)

Power factor (%) Starting current (A)

Unit model High dB (A) Medium dB (A) Low dB (A) Cooling dB (A) Heating dB (A)

Height (mm)

Height (mm) Depth (mm) Motor output (W) Model

Unit model Gas side

A unit liquid side/gas side B unit liquid side/gas side C unit liquid side/gas side D unit liquid side/gas side

Installation plate Wireless remote controller Batteries Remote controller holder Pan head wood screw Super Oxi Deo filter Super Steriling filter Zeolite plus sasa filter Bio Gingo filter Mounting screw Owner’s manual Installation manual Owner’s manual Installation manual

• For performance when each indoor unit is combined with other unit, refer to the separate table.

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

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22NKCV1

RAS-4M26SACV

7.5

3.7 – 10.0 — —

220–240 V, 1 Ph, 50Hz / 220 V, 1 Ph, 60Hz

RAS-M10SKCV RAS-M13SKCV RAS-M16SKCV RAS-M22NKCV1

0.21 / 0.20 / 0.19 0.21 / 0.20 / 0.19 0.21 / 0.20 / 0.19 0.31 / 0.30 / 0.29 35 35 30 45 75 75 65 45

Cooling

10.54 / 10.08 / 9.66 2200

10.54 / 10.08 / 9.66

3.41

RAS-M10SKCV RAS-M13SKCV RAS-M16SKCV RAS-M22NKCV1

38 / – 39 / – 45 / – 45 / – 33 / – 33 / – 40 / – 42 / – 26 / – 26 / – 30 / – 37 / –

—

RAS-M10SKCV RAS-M13SKCV RAS-M16SKCV RAS-M22NKCV1

275 275 275 298 790 790 790 998 205 205 205 220

99913

20 20 30 30

535 / – 565 / – 690 / – 850 / –

795 900 320

2000

Twin rotary type with DC-inverter variable speed control

DA220A1F-20L

High : 3200, Medium : 2800

Flare connection

RAS-M10SKCV RAS-M13SKCV RAS-M16SKCV RAS-M22NKCV1

Ø6.35 Ø6.35 Ø6.35 Ø6.35 Ø9.52 Ø9.52 Ø12.7 Ø12.7

Ø6.35 / Ø12.7 Ø6.35 / Ø9.52 Ø6.35 / Ø9.52 Ø6.35 / Ø9.52

2 70 70

No additional refrigerant

R410A

2.20 3 wires : includes earth 4 wires : includes earth

21 – 32 / –

10 – 46 / – 11 11 22 11

2 (Ø3.1 × 16L) 2 (Ø3.1 × 16L)

1 — 1 —

— 1 — 1

6 (Ø4 × 25L) 6 (Ø4 × 25L)

11 11

1 1

– 6 –

RAS-M22SKCV

Unit model Cooling capacity (kW)

Cooling capacity range (kW) Heating capacity (kW) Heating capacity range (kW) Power supply

Electric characteristics

Operating noise Medium dB (A)

Indoor unit

Piping connection Indoor unit

Wiring connection Indoor unit Interconnection Usable temperature range Indoor (°C)

Accessory Indoor unit

Indoor Outdoor

Unit model

Indoor

Indoor Sound presure level

Dimension Width (mm)

Net weight (kg) Fan motor output (W) Air flow rate (m³/h) Type

Name of refrigerant

Running current (A) Power consumption (W) Power factor (%) High dB (A)

Low dB (A) Height (mm)

Depth (mm)

Liquid side Gas side

Installation plate Wireless remote controller Batteries Remote controller holder Pan head wood screw Super Oxi Deo filter Super Steriling filter Mounting screw Owner’s manual Installation manual

RAS-M22SKCV

RAS-4M26SACV

7.5

3.7 – 10.0 — —

220–240 V, 1 Ph, 50Hz / 220 V, 1 Ph, 60Hz

RAS-M22SKCV

0.38 / 0.36 / 0.35 50 60 47 41 35

320

1050

228

13 30

1080

Flare connection

Ø6.35 Ø12.7

R410A

4 wires : includes earth

21 – 32

1 1 2 1

2 (Ø3.1 × 16L)

1 1

6 (Ø4 × 25L)

1 1

• For performance when each indoor unit is combined with other unit, refer to the separate table.

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

– 7 –

2-2. Specifications of Performance When Each Indoor Unit is Combined with Other Unit

Current

limited

Full

operation

Power

supply

(V)

220

Operating

status

1 unit

2 units

3 units

4 units

Indoor unit

ABCD

10 ——— 13 ——— 16 ——— 22 ——— 10 10 —— 13 10 —— 16 10 —— 13 13 —— 16 13 —— 16 16 —— 22 10 —— 22 13 —— 22 16 —— 22 22 —— 10 10 10 — 13 10 10 — 16 10 10 — 13 13 10 — 16 13 10 — 13 13 13 — 16 16 10 — 16 13 13 — 16 16 13 — 16 16 16 — 22 10 10 — 22 13 10 — 22 13 13 — 22 16 10 — 22 16 13 — 10 10 10 10 13 10 10 10 16 10 10 10 13 13 10 10 16 13 10 10 13 13 13 10 16 13 13 10 13 13 13 13 16 16 10 10 22 10 10 10

Operating

ABCD

2.70 ———

3.70 ———

4.50 ———

6.00 ———

2.70 2.70 ——

3.41 2.49 ——

3.94 2.36 ——

3.15 3.15 ——

3.73 3.07 ——

3.60 3.60 ——

4.97 2.23 ——

4.64 2.86 ——

4.29 3.21 ——

3.75 3.75 ——

2.50 2.50 2.50 —

3.04 2.23 2.23 —

3.40 2.05 2.05 —

2.75 2.75 2.00 —

3.10 2.55 1.85 —

2.50 2.50 2.50 —

2.88 2.88 1.74 —

2.84 2.33 2.33 —

2.66 2.66 2.18 —

2.50 2.50 2.50 —

3.94 1.78 1.78 —

3.63 2.24 1.63 —

3.36 2.07 2.07 —

3.41 2.56 1.53 —

3.17 2.38 1.95 —

1.88 1.88 1.88 1.88

2.34 1.72 1.72 1.72

2.67 1.61 1.61 1.61

2.17 2.17 1.58 1.58

2.48 2.04 1.49 1.49

2.01 2.01 2.01 1.47

2.31 1.90 1.90 1.39

1.88 1.88 1.88 1.88

2.34 2.34 1.41 1.41

3.18 1.44 1.44 1.44

Cooling

capacity

(kW)

2.7

(1.4 to 3.2)

3.7

(1.4 to 4.4)

4.5

(1.4 to 5.0)

6.0

(2.4 to 6.8)

5.4

(2.5 to 6.3)

5.9

(2.7 to 6.6)

6.3

(2.9 to 6.9)

6.3

(2.9 to 6.9)

6.8

(3.0 to 7.2)

7.2

(3.2 to 7.5)

7.2

(3.3 to 8.0)

7.5

(3.4 to 8.3)

7.5

(3.4 to 8.5)

7.5

(3.4 to 9.0)

7.5

(3.5 to 8.2)

7.5

(3.5 to 8.4)

7.5

(3.5 to 8.6)

7.5

(3.5 to 8.6)

7.5

(3.5 to 8.8)

7.5

(3.5 to 8.8)

7.5

(3.5 to 8.9)

7.5

(3.5 to 8.9)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.3)

7.5

(3.5 to 9.0)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.2)

7.5

(3.7 to 9.5)

7.5

(3.7 to 9.6)

7.5

(3.7 to 9.8)

7.5

(3.7 to 9.8)

7.5

(3.7 to 9.9)

7.5

(3.7 to 9.9)

7.5

(3.7 to 10.0)

7.5

(3.7 to 10.0)

7.5

(3.7 to 10.0)

7.5

(3.7 to 10.0)

Power

consumption

(W)

750

(640 to 950)

1200

(640 to 1520)

1650

(640 to 2000)

2020

(660 to 2500)

1560

(640 to 2040)

1850

(660 to 2220)

2040

(670 to 2400)

2120

(670 to 2400)

2290

(670 to 2570)

2550

(670 to 2750)

2250

(670 to 2690)

2550

(700 to 2850)

2500

(700 to 2880)

2430

(700 to 2950)

2400

(750 to 2720)

2400

(750 to 2780)

2400

(750 to 2840)

2400

(750 to 2840)

2400

(750 to 2900)

2400

(750 to 2900)

2400

(750 to 2930)

2400

(750 to 2930)

2400

(750 to 2990)

2400

(750 to 3050)

2400

(750 to 2950)

2400

(750 to 2960)

2400

(750 to 2960)

2400

(750 to 2960)

2400

(750 to 2970)

2200

(800 to 3170)

2200

(800 to 3200)

2200

(800 to 3270)

2200

(800 to 3270)

2200

(800 to 3300)

2200

(800 to 3300)

2200

(800 to 3330)

2200

(800 to 3330)

2200

(800 to 3330)

2200

(800 to 3300)

Operating

current

(A)

4.49

(3.88 to 5.61)

6.06

(3.88 to 7.51)

8.15

(3.88 to 9.67)

9.87

(4.00 to 11.97)

7.71

(3.88 to 9.97)

9.04

(4.00 to 10.63)

9.86

(4.06 to 11.50)

10.25

(4.06 to 11.50)

10.97

(4.06 to 12.31)

12.21

(4.06 to 13.17)

10.78

(4.06 to 12.88)

12.21

(4.24 to 13.65)

11.97

(4.24 to 13.79)

11.64

(4.24 to 14.13)

11.50

(4.43 to 13.03)

11.50

(4.43 to 13.32)

11.50

(4.43 to 13.60)

11.50

(4.43 to 13.60)

11.50

(4.43 to 13.89)

11.50

(4.43 to 13.89)

11.50

(4.43 to 14.03)

11.50

(4.43 to 14.03)

11.50

(4.43 to 14.32)

11.50

(4.43 to 14.61)

11.50

(4.43 to 14.13)

11.50

(4.43 to 14.18)

11.50

(4.43 to 14.18)

11.50

(4.43 to 14.18)

11.50

(4.43 to 14.23)

10.54

(4.72 to 15.18)

10.54

(4.72 to 15.33)

10.54

(4.72 to 15.66)

10.54

(4.72 to 15.66)

10.54

(4.72 to 15.81)

10.54

(4.72 to 15.81)

10.54

(4.72 to 15.95)

10.54

(4.72 to 15.95)

10.54

(4.72 to 15.95)

10.54

(4.72 to 15.81)

Outdoor

noise

(dB)

48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48

– 8 –

Current

limited

Full

operation

Power

supply

(V)

230

Operating

status

1 unit

2 units

3 units

4 units

Indoor unit

ABCD

Operating

ABCD

2.70 ———

3.70 ———

4.50 ———

6.00 ———

2.70 2.70 ——

3.41 2.49 ——

3.94 2.36 ——

3.15 3.15 ——

3.73 3.07 ——

3.60 3.60 ——

4.97 2.23 ——

4.64 2.86 ——

4.29 3.21 ——

3.75 3.75 ——

2.50 2.50 2.50 —

3.04 2.23 2.23 —

3.40 2.05 2.05 —

2.75 2.75 2.00 —

3.10 2.55 1.85 —

2.50 2.50 2.50 —

2.88 2.88 1.74 —

2.84 2.33 2.33 —

2.66 2.66 2.18 —

2.50 2.50 2.50 —

3.94 1.78 1.78 —

3.63 2.24 1.63 —

3.36 2.07 2.07 —

3.41 2.56 1.53 —

3.17 2.38 1.95 —

1.88 1.88 1.88 1.88

2.34 1.72 1.72 1.72

2.67 1.61 1.61 1.61

2.17 2.17 1.58 1.58

2.48 2.04 1.49 1.49

2.01 2.01 2.01 1.47

2.31 1.90 1.90 1.39

1.88 1.88 1.88 1.88

2.34 2.34 1.41 1.41

3.18 1.44 1.44 1.44

Cooling

capacity

(kW)

2.7

(1.4 to 3.2)

3.7

(1.4 to 4.4)

4.5

(1.4 to 5.0)

6.0

(2.4 to 6.8)

5.4

(2.5 to 6.3)

5.9

(2.7 to 6.6)

6.3

(2.9 to 6.9)

6.3

(2.9 to 6.9)

6.8

(3.0 to 7.2)

7.2

(3.2 to 7.5)

7.2

(3.3 to 8.0)

7.5

(3.4 to 8.3)

7.5

(3.4 to 8.5)

7.5

(3.4 to 9.0)

7.5

(3.5 to 8.2)

7.5

(3.5 to 8.4)

7.5

(3.5 to 8.6)

7.5

(3.5 to 8.6)

7.5

(3.5 to 8.8)

7.5

(3.5 to 8.8)

7.5

(3.5 to 8.9)

7.5

(3.5 to 8.9)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.3)

7.5

(3.5 to 9.0)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.2)

7.5

(3.7 to 9.5)

7.5

(3.7 to 9.6)

7.5

(3.7 to 9.8)

7.5

(3.7 to 9.8)

7.5

(3.7 to 9.9)

7.5

(3.7 to 9.9)

7.5

(3.7 to 10.0)

7.5

(3.7 to 10.0)

7.5

(3.7 to 10.0)

7.5

(3.7 to 10.0)

Power

consumption

(W)

750

(640 to 950)

1200

(640 to 1520)

1650

(640 to 2000)

2020

(660 to 2500)

1560

(640 to 2040)

1850

(660 to 2220)

2040

(670 to 2400)

2120

(670 to 2400)

2290

(670 to 2570)

2550

(670 to 2750)

2250

(670 to 2690)

2550

(700 to 2850)

2500

(700 to 2880)

2430

(700 to 2950)

2400

(750 to 2720)

2400

(750 to 2780)

2400

(750 to 2840)

2400

(750 to 2840)

2400

(750 to 2900)

2400

(750 to 2900)

2400

(750 to 2930)

2400

(750 to 2930)

2400

(750 to 2990)

2400

(750 to 3050)

2400

(750 to 2950)

2400

(750 to 2960)

2400

(750 to 2960)

2400

(750 to 2960)

2400

(750 to 2970)

2200

(800 to 3170)

2200

(800 to 3200)

2200

(800 to 3270)

2200

(800 to 3270)

2200

(800 to 3300)

2200

(800 to 3300)

2200

(800 to 3330)

2200

(800 to 3330)

2200

(800 to 3330)

2200

(800 to 3300)

Operating

current

(A)

4.29

(3.71 to 5.36)

5.80

(3.71 to 7.18)

7.80

(3.71 to 9.25)

9.44

(3.83 to 11.45)

7.37

(3.71 to 9.54)

8.65

(3.83 to 10.17)

9.44

(3.88 to 11.00)

9.81

(3.88 to 11.00)

10.49

(3.88 to 11.77)

11.68

(3.88 to 12.60)

10.31

(3.88 to 12.32)

11.68

(4.06 to 13.06)

11.45

(4.06 to 13.19)

11.13

(4.06 to 13.52)

11.00

(4.23 to 12.46)

11.00

(4.23 to 12.74)

11.00

(4.23 to 13.01)

11.00

(4.23 to 13.01)

11.00

(4.23 to 13.29)

11.00

(4.23 to 13.29)

11.00

(4.23 to 13.42)

11.00

(4.23 to 13.42)

11.00

(4.23 to 13.70)

11.00

(4.23 to 13.97)

11.00

(4.23 to 13.52)

11.00

(4.23 to 13.56)

11.00

(4.23 to 13.56)

11.00

(4.23 to 13.56)

11.00

(4.23 to 13.61)

10.08

(4.52 to 14.52)

10.08

(4.52 to 14.66)

10.08

(4.52 to 14.98)

10.08

(4.52 to 14.98)

10.08

(4.52 to 15.12)

10.08

(4.52 to 15.12)

10.08

(4.52 to 15.26)

10.08

(4.52 to 15.26)

10.08

(4.52 to 15.26)

10.08

(4.52 to 15.12)

Outdoor

noise

(dB)

48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48

– 9 –

Current

limited

Full

operation

Power

supply

(V)

240

Operating

status

1 unit

2 units

3 units

4 units

Indoor unit

ABCD

Operating

ABCD

2.70 ———

3.70 ———

4.50 ———

6.00 ———

2.70 2.70 ——

3.41 2.49 ——

3.94 2.36 ——

3.15 3.15 ——

3.73 3.07 ——

3.60 3.60 ——

4.97 2.23 ——

4.64 2.86 ——

4.29 3.21 ——

3.75 3.75 ——

2.50 2.50 2.50 —

3.04 2.23 2.23 —

3.40 2.05 2.05 —

2.75 2.75 2.00 —

3.10 2.55 1.85 —

2.50 2.50 2.50 —

2.88 2.88 1.74 —

2.84 2.33 2.33 —

2.66 2.66 2.18 —

2.50 2.50 2.50 —

3.94 1.78 1.78 —

3.63 2.24 1.63 —

3.36 2.07 2.07 —

3.41 2.56 1.53 —

3.17 2.38 1.95 —

1.88 1.88 1.88 1.88

2.34 1.72 1.72 1.72

2.67 1.61 1.61 1.61

2.17 2.17 1.58 1.58

2.48 2.04 1.49 1.49

2.01 2.01 2.01 1.47

2.31 1.90 1.90 1.39

1.88 1.88 1.88 1.88

2.34 2.34 1.41 1.41

3.18 1.44 1.44 1.44

Cooling

capacity

(kW)

2.7

(1.4 to 3.2)

3.7

(1.4 to 4.4)

4.5

(1.4 to 5.0)

6.0

(2.4 to 6.8)

5.4

(2.5 to 6.3)

5.9

(2.7 to 6.6)

6.3

(2.9 to 6.9)

6.3

(2.9 to 6.9)

6.8

(3.0 to 7.2)

7.2

(3.2 to 7.5)

7.2

(3.3 to 8.0)

7.5

(3.4 to 8.3)

7.5

(3.4 to 8.5)

7.5

(3.4 to 9.0)

7.5

(3.5 to 8.2)

7.5

(3.5 to 8.4)

7.5

(3.5 to 8.6)

7.5

(3.5 to 8.6)

7.5

(3.5 to 8.8)

7.5

(3.5 to 8.8)

7.5

(3.5 to 8.9)

7.5

(3.5 to 8.9)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.3)

7.5

(3.5 to 9.0)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.1)

7.5

(3.5 to 9.2)

7.5

(3.7 to 9.5)

7.5

(3.7 to 9.6)

7.5

(3.7 to 9.8)

7.5

(3.7 to 9.8)

7.5

(3.7 to 9.9)

7.5

(3.7 to 9.9)

7.5

(3.7 to 10.0)

7.5

(3.7 to 10.0)

7.5

(3.7 to 10.0)

7.5

(3.7 to 10.0)

Power

consumption

(W)

750

(640 to 950)

1200

(640 to 1520)

1650

(640 to 2000)

2020

(660 to 2500)

1560

(640 to 2040)

1850

(660 to 2220)

2040

(670 to 2400)

2120

(670 to 2400)

2290

(670 to 2570)

2550

(670 to 2750)

2250

(670 to 2690)

2550

(700 to 2850)

2500

(700 to 2880)

2430

(700 to 2950)

2400

(750 to 2720)

2400

(750 to 2780)

2400

(750 to 2840)

2400

(750 to 2840)

2400

(750 to 2900)

2400

(750 to 2900)

2400

(750 to 2930)

2400

(750 to 2930)

2400

(750 to 2990)

2400

(750 to 3050)

2400

(750 to 2950)

2400

(750 to 2960)

2400

(750 to 2960)

2400

(750 to 2960)

2400

(750 to 2970)

2200

(800 to 3170)

2200

(800 to 3200)

2200

(800 to 3270)

2200

(800 to 3270)

2200

(800 to 3300)

2200

(800 to 3300)

2200

(800 to 3330)

2200

(800 to 3330)

2200

(800 to 3330)

2200

(800 to 3300)

Operating

current

(A)

4.11

(3.56 to 5.14)

5.56

(3.56 to 6.88)

7.47

(3.56 to 8.87)

9.05

(3.67 to 10.98)

7.07

(3.56 to 9.14)

8.29

(3.67 to 9.75)

9.04

(3.72 to 10.54)

9.40

(3.72 to 10.54)

10.05

(3.72 to 11.28)

11.20

(3.72 to 12.07)

9.88

(3.72 to 11.81)

11.20

(3.89 to 12.51)

10.98

(3.89 to 12.64)

10.67

(3.89 to 12.95)

10.54

(4.06 to 11.94)

10.54

(4.06 to 12.21)

10.54

(4.06 to 12.47)

10.54

(4.06 to 12.47)

10.54

(4.06 to 12.73)

10.54

(4.06 to 12.73)

10.54

(4.06 to 12.86)

10.54

(4.06 to 12.86)

10.54

(4.06 to 13.13)

10.54

(4.06 to 13.39)

10.54

(4.06 to 12.95)

10.54

(4.06 to 13.00)

10.54

(4.06 to 13.00)

10.54

(4.06 to 13.00)

10.54

(4.06 to 13.04)

9.66

(4.33 to 13.92)

9.66

(4.33 to 14.05)

9.66

(4.33 to 14.36)

9.66

(4.33 to 14.36)

9.66

(4.33 to 14.49)

9.66

(4.33 to 14.49)

9.66

(4.33 to 14.62)

9.66

(4.33 to 14.62)

9.66

(4.33 to 14.62)

9.66

(4.33 to 14.49)

Outdoor

noise

(dB)

48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48

– 10 –

Current

limited

11A

Power

supply

(V)

230

Operating

status

1 unit

2 units

3 units

4 units

Indoor unit

ABCD

Operating

ABCD

2.70 ———

3.70 ———

4.50 ———

6.00 ———

2.70 2.70 ——

3.41 2.49 ——

3.94 2.36 ——

3.15 3.15 ——

3.73 3.07 ——

3.55 3.55 ——

4.97 2.23 ——

4.52 2.78 ——

4.17 3.13 ——

3.70 3.70 ——

2.50 2.50 2.50 —

3.04 2.23 2.23 —

3.40 2.05 2.05 —

2.75 2.75 2.00 —

3.10 2.55 1.85 —

2.50 2.50 2.50 —

2.88 2.88 1.74 —

2.84 2.33 2.33 —

2.66 2.66 2.18 —

2.50 2.50 2.50 —

3.94 1.78 1.78 —

3.63 2.24 1.63 —

3.36 2.07 2.07 —

3.41 2.56 1.53 —

3.17 2.38 1.95 —

1.88 1.88 1.88 1.88

2.34 1.72 1.72 1.72

2.67 1.61 1.61 1.61

2.17 2.17 1.58 1.58

2.48 2.04 1.49 1.49

2.01 2.01 2.01 1.47

2.31 1.90 1.90 1.39

1.88 1.88 1.88 1.88

2.34 2.34 1.41 1.41

3.18 1.44 1.44 1.44

Cooling

capacity

(kW)

2.7

(1.4 to 3.2)

3.7

(1.4 to 4.4)

4.5

(1.4 to 5.0)

6.0

(2.4 to 6.5)

5.4

(2.5 to 6.3)

5.9

(2.7 to 6.6)

6.3

(2.9 to 6.9)

6.3

(2.9 to 6.9)

6.8

(3.0 to 7.1)

7.1

(3.2 to 7.1)

7.2

(3.3 to 7.3)

7.3

(3.4 to 7.3)

7.3

(3.4 to 7.3)

7.4

(3.4 to 7.4)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.5 to 7.5)

7.5

(3.7 to 7.7)

7.5

(3.7 to 7.7)

7.5

(3.7 to 7.7)

7.5

(3.7 to 7.7)

7.5

(3.7 to 7.7)

7.5

(3.7 to 7.7)

7.5

(3.7 to 7.7)

7.5

(3.7 to 7.7)

7.5

(3.7 to 7.7)

7.5

(3.7 to 7.7)

Power

consumption

(W)

750

(640 to 950)

1200

(640 to 1520)

1650

(640 to 2000)

2020

(660 to 2400)

1560

(640 to 2040)

1850

(660 to 2220)

2040

(670 to 2400)

2120

(670 to 2400)

2290

(670 to 2400)

2400

(670 to 2400)

2250

(670 to 2400)

2400

(700 to 2400)

2400

(700 to 2400)

2400

(700 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2400

(750 to 2400)

2200

(800 to 2400)

2200

(800 to 2400)

2200

(800 to 2400)

2200

(800 to 2400)

2200

(800 to 2400)

2200

(800 to 2400)

2200

(800 to 2400)

2200

(800 to 2400)

2200

(800 to 2400)

2200

(800 to 2400)

Operating

current

(A)

4.29

(3.71 to 5.36)

5.80

(3.71 to 7.18)

7.80

(3.71 to 9.25)

9.44

(3.83 to 11.00)

7.37

(3.71 to 9.54)

8.65

(3.88 to 10.17)

9.44

(3.88 to 11.00)

9.81

(3.88 to 11.00)

10.49

(3.88 to 11.00)

11.00

(3.88 to 11.00)

10.31

(3.88 to 11.00)

11.00

(4.06 to 11.00)

11.00

(4.06 to 11.00)

11.00

(4.06 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

11.00

(4.23 to 11.00)

10.08

(4.52 to 11.00)

10.08

(4.52 to 11.00)

10.08

(4.52 to 11.00)

10.08

(4.52 to 11.00)

10.08

(4.52 to 11.00)

10.08

(4.52 to 11.00)

10.08

(4.52 to 11.00)

10.08

(4.52 to 11.00)

10.08

(4.52 to 11.00)

10.08

(4.52 to 11.00)

Outdoor

noise

(dB)

48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48 48

– 11 –

2-2-1. Operation Characteristic Curve

• Conditions Indoor : DB27˚C/WB19˚C Outdoor : DB35˚C Air flow : High Pipe length : 5m × 4 4 units operating

220V

Current (A)Capacity ratio (%)

230V

10 20 30 40 50 60 70 80 90

Inverter output frequency (rps)

2-2-2. Capacity Variation Ratio According to Outdoor Temperature

240V

110

100

• Conditions Indoor : DB27˚C/WB19˚C Outdoor : DB35˚C Indoor air flow : High Pipe length : 5m × 4 4 units operating

33 34 35 36 37 38 39 4032

Current limited start

41 42 43 44 45 46

Outdoor temp. (˚C)

Capacity ratio 100% = 7.5kW

– 12 –

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.

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 problem. 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 concentr ation does not exceed the marginal le vel.

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

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

Improper installation may cause refrigeration problem, 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 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.

Further more, 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 capillar y 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.

– 13 –

Table 3-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

Nominal diameter

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

Outer diameter (mm)

6.35

9.52

12.70

15.88

R410A R22

0.80 0.80

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 3/8 1/2 5/8

Reference outer diameter of

copper pipe jointed (mm)

6.35

9.52

12.70

15.88

Minimum joint thickness

(mm)

0.50

0.60

0.70

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

– 14 –

d) Flare Processing

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

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

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

Flare processing dimensions differ according to the type of flare tool.

When using a conventional flare tool, be sure to secure “Dimension A” by using a gauge for size adjustment.

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

Nominal

diameter

Outer

diameter

(mm)

Thickness

(mm)

Fig. 3-2-1 Flare pr ocessing dimensions

Flare tool for R410A

clutch type

ØD

A (mm)

Conventional flare tool

Clutch type Wing nut type

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

Nominal

diameter

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

6.35

9.52

12.70

15.88

0.8

1.0

0 to 0.5 0 to 0.5 0 to 0.5 0 to 0.5

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

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

1.0

Flare tool for R22

clutch type

0 to 0.5 0 to 0.5 0 to 0.5 0 to 0.5

1.0 to 1.5 1.5 to 2.0

1.0 to 1.5 2.0 to 2.5

A (mm)

Conventional flare tool

Clutch type Wing nut type

0.5 to 1.0 1.0 to 1.5

0.5 to 1.0 1.5 to 2.0

Nominal

diameter

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

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

Outer diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

1.0

Dimension (mm)

ABCD

9.1 9.2 6.5 13

13.2 13.5 9.7 20

16.6 16.0 12.9 23

19.7 19.0 16.0 25

– 15 –

Flare nut width

(mm)

17 22 26 29

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

Nominal

diameter

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

Outer diameter

(mm)

6.35

9.52

12.70

15.88

19.05

45˚ to 46˚

Thickness

(mm)

0.8

1.0

B A

Dimension (mm)

ABCD

9.0 9.2 6.5 13

13.0 13.5 9.7 20

16.2 16.0 12.9 20

19.7 19.0 16.0 23

23.3 24.0 19.2 34

43˚ to 45˚

Flare nut width

(mm)

17 22 24 27 36

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

2. Flare Connecting Procedures and Precautions

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

The tightening torque for R410A is the same as that for conventional R22. Incidentally, when the torque is weak, the gas leakage may occur. 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.

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

Nominal

diameter

1/4

Outer diameter

(mm)

6.35

Tightening torque

N•m (kgf•cm)

14 to 18 (140 to 180)

Tightening torque of torque

wrenches available on the market

N•m (kgf•cm)

16 (160), 18 (180) 3/8 1/2 5/8

9.52

12.70

15.88

33 to 42 (330 to 420) 50 to 62 (500 to 620) 63 to 77 (630 to 770)

– 16 –

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

3-3. Tools

3-3-1. Required T ools

The service port diameter of packed v alve 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 f or R410A, but can be also used for conventional refrigerant (R22)

3. Tools commonly used for R410A and for conventional refrigerant (R22) The table below shows the tools exclusive for R410A and their interchangeability.

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

Tools whose specifications are changed for R410A and their interchangeability

air-water heat pump installation

No.

4 5 6

7 8

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

Used tool

Flare tool Copper pipe gauge for

adjusting projection margin

Torque wrench (For Ø12.7)

Gauge manifold Charge hose Vacuum pump adapter

Electronic balance for refrigerant charging

Refrigerant cylinder Leakage detector Charging cylinder

Usage

Pipe flaring Flaring by

conventional flare tool

Connection of flare nut

Evacuating, refrigerant charge, run check, etc.

Vacuum evacuating Refrigerant charge Refrigerant charge

Gas leakage check Refrigerant charge

Existence of new equipment for R410A

Yes

Yes Yes Yes

Yes

(Note 2)

R410A

Whether conventional equipment can be used

*(Note 1)

× ×

× × ×

× ×

Conventional air-water heat pump installation

Whether new equipment can be used with conventional refrigerant

*(Note 1)

× ×

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

– 17 –

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 e xceeding 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

– 18 –

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

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

It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant. Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the

cylinder upside down if cylinder is not equipped with siphon.

[ Cylinder with siphon ] [ Cylinder without siphon ]

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Gauge manifold

OUTDOOR unit

cylinder

Refrigerant

Electronic

balance

R410A refrigerant is HFC mixed refrigerant. Therefore, if it is charged with gas, the

composition of the charged refrigerant changes and the characteristics of the equipment varies.

3-5. Brazing of Pipes

3-5-1. Materials for Brazing

1. Silver brazing filler

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

2. Phosphor bronze brazing filler

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

Electronic

balance

Siphon

Fig. 3-4-2

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

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

3-5-2. Flux

3. Low temperature brazing filler

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

1. Reason why flux is necessary

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

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

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

– 19 –

2. Characteristics required for flux

• Activated temperature of flux coincides with the brazing temperature.

• Due to a wide effective temper ature 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 perf ormance 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 prev ent 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.

Piping material

Copper - Copper

Copper - Iron

Iron - Iron

Used brazing filler

Phosphor copper

Silver Silver

Used flux

Do not use

Paste flux

Vapor flux

1. Do not enter flux into the refrigeration cycle.

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

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

4. Remove the flux after brazing.

Flow meter

Stop valve

Nitrogen gas

cylinder

From Nitrogen cylinder

Pipe

Nitrogen gas

Rubber plug

Fig. 3-5-1 Pre vention of oxidation during brazing

– 20 –

4. CONSTRUCTION VIEWS

4-1. Indoor Unit

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV

790

Front panel

Knock out system

275

Air filter

116

Air inlet

Heat exchanger

480

Installation plate hanger

62 69

193

205

Knock out system

Wireless remote controller

157

Installation plate hanger

Connecting pipe (0.35m) (For 10,13 series; Flare Ø9.52mm) (For 16 series; Flare Ø12.7mm)

84.5 235

215

Hanger

Minimum

distance

to wall

170 or more

275

84.5 150 84.5 Center line

Drain hose (0.50m)

Connecting pipe (0.40m) (Flare Ø6.35mm)

621

235

215

Minimum

distance to ceiling

or more

Hanger Hanger

160.5 160.5 150 Installation plate outline

– 21 –

84.5

Minimum

distance

to wall

170 or more

125

Remote controller holder

190

RAS-M22SKCV

1050

Front panel

73.5 7

Knock out system Knock out system

Air filter

320

Heat exchanger

Installation plate hanger

132 568 200 150

Air inlet

228

72 78

56 24

Wireless remote controller

73.5

204

Installation plate hanger

Connecting plate (0.39m) (Flare Ø12.70mm)

132 786

320

47 215.5 262.5 262.5 153.5 109

Drain hose (0.5mm)

235 215 215

Hanger

Center line Instrallation plate outline

235

Hanger

Connecting pipe (0.49m) (Flare Ø6.35mm)

132

163

82 26

Remote controller holder

– 22 –

RAS-M22NKCV1

Knock out system

Back body Front panel

Grille inlet

298

Air inlet

Air outlet

998

220

Knock out system

Connection pipe (0.39 m) (Flare Ø12.7)

Outline of indoor unit

55 or more

Minimum distance

to ceiling

298

Ø65

100

160

Drain hose (0.54 m)

Connection pipe (0.49 m) (Flare Ø6.35)

Wireless remote controller

998

763.5 450

(For stud bolt Ø6) (For stud bolt Ø8 - Ø10)

55 5555

Installation plate outline

100

Ø65

– 23 –

4-2. Outdoor Unit

RAS-4M26SACV

2-dia.12 × 17 U-shape hole (for dia.8-10 anchor bolt)

17.517.5

365

320

150 150

Anchor bolt

long hole pitch

600

log part

900

Fan guard

136

dia.510

Mounting dimensions of anchor bolt

2-dia.12 × 17 U-shape hole (for dia.8-10 anchor bolt)

600

Intake

100 or more

Intake

100 or more

365

log part

2-dia.12 × 17 long hole (for dia.8-10 anchor bolt)

600 or more

Outlet

Outside line of product

2-dia.12 × 17 long hole (for dia.8-10 anchor bolt)

When installing the outdoor unit, leave open in at least two of directions (A), (B), (C) and (D) shown in the figure below.

600 or more

(Minimum distance from wall)

164

Fan guardOutdoor air temperature sensor

Hanger

Liquid valve

– 24 –

795

514

410

90 53 53 53 53 53 5353

400

Gas valve Service port

Connecting pipe port :

D unit

C unit

B unit

A unit

Hanger

Connecting pipe dia.6.35 Connecting pipe dia.9.52 Connecting pipe dia.6.35 Connecting pipe dia.9.52 Connecting pipe dia.6.35 Connecting pipe dia.9.52 Connecting pipe dia.6.35 Connecting pipe dia.12.7

Screw

Knock out

2-dia.3.5 hole

Knock out

262 431

Drain long hole dia.20 × 88 long hole

Drain hole dia.25

5-dia.3.5 hole

Knock out

Tightly seal the knock-out holes and screw/thread areas using a silicon adhesive, etc. to ensure that there is no water drippage.

Under some conditions, comdensation may form on the base plate and arain, use the drain pan.

Detailed A log part Detailed B log part

365

R20

600

Outside line of product

units : mm

365

50 12

600

R14

Outside line of product

5-1. Indoor Unit

RAS-M10SKCV, RAS-M13SKCV

5. WIRING DIAGRAM

Outdoor terminal block

Indoor terminal block

Power supply (From Outdoor unit) 1 , 220 240V ~, 50Hz 1 , 220V

Heat exchanger sensor

(TCJ)

1 2

Heat exchanger sensor

(TC)

121

Thermo sensor

(TA)

BLU

MCC-5044

11 12 13 14 15

CN10

(WHI)

Wireless unit assembly

BLU BLU BLU BLU BLU BLU BLU BLU BLU BLU BLU BLU BLU WHI

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15

CN21 (WHI)

, 60Hz

Sheet metal

CN02

Fuse F01

T3.15A

CN63 (YEL)

CN62 (BLU)

CN61 (WHI)

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15

1 2 3

BLK

WHI

BLK

CN51

CN01

Varistor

DC5V

DC12V

Main P.C. board

MCC-5046

RED

Line filter

Heat exchanger

GRN & YEL

CN31

(WHI)

CN33 (WHI)

CN32 (WHI)

CN22 (WHI)

1 2 3 4

Power supply circuit

WHI

YEL YEL YEL YEL

AC motor

Fan motor

Louver motor

Color

Identification

YEL : BLK : BLACK WHI : WHITE RED : RED BLU : BLUE GRN & YEL :

GRAY &

YELLOW

– 25 –

RAS-M16SKCV, RAS-M22SKCV

Outdoor terminal block

Indoor terminal block

Power supply (From Outdoor unit) 1Ø, 220 – 240V 1Ø, 220V ~, 60Hz

Heat exchanger sensor

(TCJ)

1 2

Heat exchanger sensor

(TC)

121

Thermo sensor

(TA)

BLU

MCC-5044

Wireless unit assembly

CN10

(WHI)

BLU BLU BLU BLU BLU BLU BLU BLU BLU WHI

1 2 3 4 5 6 7 8

9 10 11

CN21 (WHI)

Sheet metal

CN02

Fuse F01

T3.15A

AC250V

CN63 (YEL)

CN62

(BLU)

CN61

(WHI)

1 2 3 4 5 6 7 8

9 10 11

1 2 3

BLK

WHI

, 50Hz

BLK

CN51

CN01

Varistor

Line filter

Main P.C. board

MCC-5045

RED

DC5V

DC12V

–

Heat exchanger

GRN & YEL

3 4 4 5

3 5

DC motor

6 6

CN31

(WHI)

CN32

(WHI)

CN22

(WHI)

WHI YEL YEL YEL YEL

Fan motor

Louver motor

1 2 3 4

Color

Power supply circuit

Identification

YEL : BLK : BLACK WHI : WHITE RED : RED BLU : BLUE GRN & YEL :

GRAY &

YELLOW

– 26 –

RAS-M22NKCV1

Louver motor

YEL

WHI

PNK

RED

ORN

6 5 4 3 2 1 6

5 4 3 2 1

BRW

CN07

Infrared rays receive

and indication parts

MCC-819

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

BLU

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

BLU

10 10

WHI

CN25

CN14

JEM-A

1 2 3 4

CN08

Outdoor unit

BLK

WHI

RED

Indoor

terminal block

GRN & YEL

Indoor unit

CN24 CN23 CN21

T3.15A, 250V

Color

Identification

BRW: BROWN RED : RED WHI : WHITE YEL :

YELLOW BLU : BLUE BLK : BLACK GRY : GRAY ORN : ORANGE GRN : GREEN PNK : PINK GRN & YEL :

GRAY &

YELLOW

F01

1 2 3 1 2 3

CN11

BRW GRY

YEL

Fan motor

drive circuit

5 3 1 5 3 1

BLK

11223344556

145˚C

Power supply

CN10

WHI

RED

circuit

Main P.C. board

Thermo.

sensor

AC Fan motor

(WP-004)

1 2

CN03 (WHI)

1 2

BLK

(TA)

+12V DC +5V DC

Heat exchanger

sensor

1 2 1 2

BLK

(TC)

BLK

CN01 (BLU)

Simple check points for diagnosing faults

Check item Diagnosis result

Operation indicator

Terminal block

Fuse, 3.15A

DC5V

DC12V

AC220 – 240V

Check to see if the OPERATION indicator goes on and off when the main switch or breaker is turned on.

Check the power supply voltage between (Refer to the name plate) Check the voltage between



Check to see if the fuse blows out.

Check the voltage at the No. 8 pin on CN14 connector of the infrared receiver.

Check the voltage at the brown lead of the louver motor. (Check the power supply circuit of the rated voltage.)

Check the voltage at the No. 1 pin of CN10 connector and CN24. (Check the F01)

For detailed diagnostic procedure, refer to the service data.

and .



and . (AC15 – 60V)

– 27 –

5-2. Outdoor Unit

RAS-4M26SACV

Thermostat for compressor

ORN

212

ORN

Fan motor

PMV

SUB P.C. Board

(MCC-818)

F500, Fuse T6.3A, 250V~

WHI

RED ORN PNK YEL

Color Identification

BLK : BLACK PNK : PINK ORN: ORANGE

P501 P500

CN301

CN300

CN704

BLU

CN802

CN608

CN607

CN606

121

Compressor

121 3

1 1 3

1 1

CN703

RED

CN702

WHI

CN701

YEL

Fan

circuit

F300, Fuse T3.15A, 250V~

CN605

CN604

CN602

CN601

CN302

CN800

Photo coupler

CN303

3 1 1

2 2 1 1

3 1 1

2 2 1 1

3 1

5 4 3 2 1

212

CN501

BLU : BLUE GRN : GREEN YEL : YELLOW RED : RED WHI : WHITE PUR : PURPLE GRY: GRAY BRW : BROWN

RED

121

BLU

GRN

RED

WHI

BLK

TGd

TGc

P.C. Board

(MCC-1438)

CN20 CN21 CN22

Power supply circuit

(For P.C. Board)

F04 Fuse T3.15A 250V~

T03 CT T04 CT

BRW

YEL

121

TGb

C13

TGa

BLU

C12 C11 C10

3 1

5 4 3 2 1

BLU YEL

BLK WHI

BLU RED PNK

PUR ORN

3 1

5 4 3 2 1

212

3 1

5 4 3 2 1

Power

relay

RY02

RB05

CN04

CN06

CN05

F02 Fuse 25A 250V~

T02 CT

5 5

Varistor

F01, Fuse T25A, 250V~

3 1

Fuse, T6.3A, 250V~

WHI

RED

3 1 1

CN13

CN01P07 P03 P04 P05 P06 CN02 CN03

P20 P19

P18 P17

P13 P12

P09 P08

BU EU BV EV BW EW BX BY BZ

–

Q200

YEL

BLU

IGBT

G C

(PFC)

Q404

Diode

block

~ ~

(PFC)

–

DB02

P29

P21

Diode

P24

P28

–

GRY

Reactor

212

Surge

absorber

BLKBLKBLK WHI

IGBT module

block

1 2 3 1 2 3 1 2 3 1 2 3

Indoor

unit A

Indoor

unit B

Indoor

unit C

Indoor

unit D

– 28 –

WHI

Terminal block

220–240V ~50Hz

220–220V ~60Hz

L N

Power supply

6. SPECIFICATIONS OF ELECTRICAL PARTS

6-1. Indoor Unit

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV

No.

Fan motor

(for indoor)

Room temp. sensor (TA-sensor)

Heat exchanger temp. sensor (TC-sensor)

Louver motor

RAS-M22NKCV1

No.

Fan motor (for indoor)

Thermo. sensor (TA-sensor)

DC-DC transformer (T01)

Microcomputer

Heat exchanger temp. sensor (TC-sensor)

Line filter (L01)

Diode (DB01)

Capacitor (C50)

Fuse (F01)

Regulator IC (IC08)

Regulator IC (IC11)

Resistor (R21, R109)

Louver motor

6-2. Outdoor Unit

Parts name

RAS-M10SKCV, M13SKCV RAS-M16SKCV, M22SKCV

Parts name

Type

AFS-220-20-4AR

ICF-340-30-2B

( – ) ( – )

MP24Z3T

Type

AFS-220-31-4A

( – )

TT-10

µPD780024AGK

( – )

SS11V-06270

KBP06M LXV35VB2200MJ20 BET 3.15A, AC250V

NJM7812 NJM7805 15G561K

MP35EA12

Specifications

AC240V, 20W DC340V, 30W 10kΩ at 25°C 10kΩ at 25°C Output (Rated) 1W, 16 poles, DC12V

Specifications

AC220–240V 10kΩ at 25°C 198-264V, 6VA

10kΩ at 25°C 27µH, AC 0.64A

1.5A, 420V 2200µF, 35V T3.15A, 250V DC12V, 1.5A max. DC5V, 1.5A max 560V DC12V

RAS-4M26SACV

No.

SC coil (Noise filter) (L01)

SC coil (Noise filter) (L02) SC coil (Noise filter) (L03)

DC-DC transformer

Outside fan motor

Relay (Power relay)

Discharge temp. sensor (TD-sensor)

Outside air temp. sensor (TO-sensor)

Temp. sensor at A room gas side (TGA-sensor)

Temp. sensor at B room gas side (TGB-sensor)

Temp. sensor at C room gas side (TGC-sensor)

Temp. Sensor at D room gas side (TGD-sensor)

Ter minal block (6P)

Ter minal block (3P)

Fuse

Electrolytic capacitor

Transistor module

Compressor

Compressor thermo.

Diode block (Rectifire)

Reactor (Main)

Parts name

Model name

ADR2520R15TB

SC-20-S03J

ADR25H200RBTB

SWT-75

ICF-140-63-2R

G4A-1A-PE

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

—

— For protection of switching power source (F04) For protection of power f actor converter circuit breakage For protection of inverter input overcurrent For protection of switching power source (F300) For protection of power source

LLQ2G761KHUATF

6MBI40SS-060-51A

DA220A2F-20L

US622KXTMQO

S30VT80

CH-47-Z-T

Rating

AC 250V, 20A, 0.15mH AC 250V, 20A, 0.3mH AC 250V, 20A, 0.88mH Primary side DC 240 – 390V

Secondary side : 7V × 1, 13V × 1

DC 140V, 63W Coil : DC 12V

Contact : 20A, AC250V 64kΩ (20°C) 10kΩ (25°C) 10kΩ (25°C) 10kΩ (25°C) 10kΩ (25°C) 10kΩ (25°C) AC 250V, 20A AC 250V, 20A AC 250V, 3.15A AC 250V, 25A AC 250V, 25A AC 250V, 3.15A AC 250V, 6.3A DC 400V, 760µF 600V, 40A 3 phases, 4 poles, 2000W OFF : 125 ± 4°C, ON : 90 ± 5°C AC 800V, 30A L = 8mH, 16A

16V × 3

– 29 –

7. REFRIGERANT CYCLE DIAGRAM

7-1. Indoor Unit and Ourdoor Unit

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV, RAS-M22NKCV1 / RAS-4M26SACV

Connecting pipe Thickness : 0.8mm Ø12.7 : RAS-M22NKCV1, RAS-M16SKCV RAS-M22SKCV

Ø9.52 : RAS-M10SKCV, RAS-M13SKCV

Temp. measurement

D room

C roomToB room

TGd TGc TGb

Indoor unit A

Evaporator

Cross flow fan

Connecting pipe Thickness : 0.8mm Ø6.35

Sectional shape of heat insulator

TGa

Strainer

TCa To

D room

(Ø6.35)(Ø9.52) (Ø9.52) (Ø9.52) (Ø12.7) (Ø6.35) (Ø6.35) (Ø6.35)

C room

B room

Per 1 unit Max. : 25m Min. : 2m

Total Max. : 70m ∗1 or

Allowable height

difference : 15m

50m ∗2

Allowable pipe length

Pulse motor valve at liquid side (UKV-18D)

Pressure

measurement Gauge attaching port Vacuum pump connecting port

Accumulating tank 1500cc

Temp. measurement

Packed valve (Gas side) (Ø12.7)

Propeller fan

Outdoor unit

Packed valve (Liquid side) (Ø9.52)

Muffler Ø25 x 160L

Compressor DA220A2F-20L

Refrigerant amount : 2.2kg (R410A)

NOTE : Gas leak check position Refrigerant flow

NOTE :

∗1 In case of without the RAS-M22SKCV indoor unit. ∗2 In case of with the RAS-M22SKCV indoor unit. ∗∗ The additional charging of refrigerant is unnecessar y because this conditioner is designed with charge-less

specification.

– 30 –

7-2. Operation Data

Temperature

condition

Indoor Outdoor

27 /19 35 / –

No. of

operating

units

1 unit

2 units

3 units

4 units

Operating combination

(Unit)

ABCD

10 ––– 13 ––– 16 ––– 22 ––– 10 10 –– 13 10 –– 16 10 –– 13 13 –– 16 13 –– 16 16 –– 10 22 –– 13 22 –– 16 22 –– 22 22 –– 10 10 10 – 13 10 10 – 16 10 10 – 13 13 10 – 16 13 10 – 13 13 13 – 16 16 10 – 16 13 13 – 16 16 13 – 16 16 16 – 22 10 10 – 22 13 10 – 22 13 13 – 22 16 10 – 22 16 13 – 10 10 10 10 13 10 10 10 16 10 10 10 13 13 10 10 16 13 10 10 13 13 13 10 16 13 13 10 16 16 10 10 22 10 10 10

Standard pressure

P (MPa)

0.8 to 1.0

0.7 to 0.9

0.6 to 0.8

0.7 to 0.9

0.8 to 1.0

0.7 to 0.9

0.8 to 1.0

0.9 to 1.0

0.8 to 1.0

0.9 to 1.1

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

9 to 11 45 to 47 8 to 10 46 to 48

7 to 9 47 to 49 8 to 10 48 to 50 10 to 12 47 to 49 10 to 12 48 to 50 10 to 12 49 to 51 10 to 12 50 to 52 9 to 11 51 to 53 9 to 11 52 to 54 10 to 12 50 to 52 10 to 12 50 to 52 10 to 12 50 to 52 11 to 13 51 to 53 11 to 13 51 to 53 11 to 13 51 to 53 11 to 13 51 to 53 11 to 13 51 to 53 11 to 13 52 to 54 11 to 13 52 to 54 11 to 13 52 to 54 12 to 14 52 to 54 12 to 14 52 to 54 12 to 14 52 to 54 11 to 13 49 to 51 11 to 13 50 to 52 11 to 13 51 to 53 11 to 13 52 to 54 11 to 13 52 to 54 12 to 14 51 to 53 12 to 14 51 to 53 12 to 14 52 to 54 12 to 14 52 to 54 12 to 14 52 to 54 12 to 14 53 to 55 12 to 14 53 to 55 12 to 14 54 to 56 12 to 14 53 to 55

Indoor

fan

High High High High High High High High High High High High High High High High High High High High High High High High High High High High High High High High High High High High High High

Outdoor

fan

MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED MED

Compressor

revolution

(rps)

22 35 45 52 42 45 49 53 58 62 57 57 58 60 60 60 61 61 62 62 62 63 63 63 62 64 66 68 70 62 64 66 67 68 69 70 71 71

NOTE :

Model of indoor unit: RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22NKCV1, RAS-M22SKCV

NOTES :

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

2. Connecting piping condition : 5 meters × 4 units (5m/each indoor unit)

– 31 –

8. CONTROL BLOCK DIAGRAM

8-1. Indoor Unit

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV

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

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

• Clean Function

Serial Signal Transmitter/Receiver

Indoor Unit Control Unit

Louver Motor

Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

From Outdoor Unit

220V

~50Hz ~60Hz

220-240V

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

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

Infrared Rays, 36.7kHz

COMFORT SLEEP

QUIET

– 32 –

8-2. Outdoor Unit (Inverter Assembl y)

RAS-4M26SACV

Gas side pipe temp. sensorOutdoor air temp. sensor Discharge temp. sensor

A unit PMV

B unit PMV

C unit PMV

D unit PMV

Driver circuit

of PMV

Rotor position

detect circuit

Inverter

(DC ® AC)

• Inverter outdoor frequency control

• A/D converter function

• PMV control

• Discharge temp. control

• Error display

• Signal communication to M.C.U.

• PWM synthesis function

Gate

drive circuit

M.C.U

MCC-818 (SUB-P.C. B)

A unit send/

receive circuit

B unit send/

receive circuit

C unit send/

receive circuit

D unit send/

receive circuit

Clock frequency

oscillator circuit

16MHz

Outdoor

fan motor

Over current

sensor

Over current detect circuit

Noise filter

Input current

sensor

Converter

(AC ® DC)

Over current

sensor

Clock frequency

oscillator circuit

10MHz

High power factor

correction circuit

Over current detect circuit

Signal communication

to MCU

220–240V ~50Hz

220V ~60Hz

MCC-1438 (MAIN-P.C. B)

M.C.U

• PWM synthesis function

• Input current release control

• IGBT over current detect control

• High power factor correction control

• Signal communication to M.C.U.

• Output current release control

• A/D converter function

Compressor

Inverter

(DC ® AC)

Output current

sensor

Gate drive

circuit

PMV : Pulse motor valve PWM : Pulse width modulation IGBT : Insulated gate bipolar transistor

– 33 –

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 fan motor and the outdoor fan motor.

And the capacity-proportional 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 2 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

• 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

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.

2. Role of outdoor unit controller

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

• Compressor operation control

• Operation control of outdoor fan motor

• PMV control



Operations followed to judgment



of serial signal from indoor side.



– 34 –

9-2. Operation Description

9-2. 1. Basic operation....................................................................................................................... 36

1. Operation control ............................................................................................................... 36

2. Cooling operation .............................................................................................................. 37

3. AUTO operation ................................................................................................................. 37

4. DRY operation ................................................................................................................... 37

2. Indoor fan motor control.......................................................................................................... 38

<In cooling operation> ............................................................................................................ 38

3. Outdoor fan motor control....................................................................................................... 39

4. Capacity control...................................................................................................................... 40

5. Current release control........................................................................................................... 40

6. Louver control......................................................................................................................... 4 1

1) Louver position .................................................................................................................. 41

2) Air direction adjustment ..................................................................................................... 41

3) Swing ................................................................................................................................. 41

7. ECO operation........................................................................................................................ 42

1. Indoor unit.......................................................................................................................... 42

2. Outdoor unit....................................................................................................................... 4 2

8. Temporary operation............................................................................................................... 42

9. Self-cleaning function

(RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV) ................................... 43

10. Self-cleaning operation cancel

(RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV,RAS-M22SKCV) .................................... 45

11. Remote-A or B selection

(RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV) ................................... 46

Remote-A or B selection (RAS-M22NKCV1).......................................................................... 47

12. QUIET mode........................................................................................................................... 48

13. COMFORT SLEEP ................................................................................................................. 48

14. Short timer (RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV) ................ 48

15. One-Touch comfort (RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV).... 49

16. Hi POWER mode.................................................................................................................... 49

17. FILTER indicator (RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV)........ 49

FILTER indicator (RAS-M22NKCV1) ...................................................................................... 49

9-3. Auto Restart Function

(RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV) ..................... 50

9-3-1. How to Set the Auto Restart Function ................................................................................ 50

9-3-2. How to Cancel the Auto Restart Function.......................................................................... 51

9-3-3. Power Failure During Timer Operation ............................................................................... 51

9-4. Auto Restart Function (RAS-M22NKCV1) .............................................................52

9-4-1. How to Set the Auto Restart Function ................................................................................ 52

9-4-2. How to Cancel the Auto Restart Function.......................................................................... 53

9-4-3. Power Failure During Timer Operation ............................................................................... 53

9-5. Remote Controller

(RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV) ..................... 54

9-5-1. Remote Controller and Its Functions.................................................................................. 54

9-5-2. Operation of Remote Controller .......................................................................................... 54

9-5-3. Name and Functions of Indications on Remote Controller .............................................. 57

9-6. Remote Controller (RAS-M22NKCV1).................................................................... 58

9-6-1. Remote Controller and Its Functions.................................................................................. 58

9-6-2. Name and Functions of Indications on Remote Controller .............................................. 59

– 35 –

Item

Operation flow and applicable data, etc.

Description

1. Basic operation

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 below, and also controls the compressor, outdoor fan motor and pulse motor valve.

Selection of

operation conditions

ON/OFF

Remote controller

Control contents of remote controller

• ON/OFF

• Operation select

• Temperature setup

• Air direction

• Swing

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

• ECO

• ON timer setup

• OFF timer setup

• High power

• COMFORT SLEEEP

• 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

• 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

• Delay function of compressor reactivation

• Current release function

• GTr over-current preventive function

Inverter

• Indoor fan motor

• Louver motor

• Compressor

• Outdoor fan motor

• Pulse motor valve (PMV)

– 36 –

Item

Operation flow and applicable data, etc.

Description

1. Basic operation

2. Cooling operation

The operation is performed in the following parts by controls according to cooling conditions.

1) Receiving the operation ON signal of the remote controller, the cooling operation starts according to the signal 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 louver according to the contents of “6. Louver control”, respectively.

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

Operation ON

Indoor unit control

Sending of operation command signal

Outdoor unit control

3. AUTO operation

Selection of operation mode

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

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

is controlled by the previous operation mode.

Setup of remote controller

Indoor fan motor control / Louver control

Compressor revolution control / Outdoor fan motor control Pulse motor valve control

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

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

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

4) Then, select an operation mode.

Cooling operation

Ts + 1

Monitoring (Fan)

Ts – 1

Monitoring (Fan)

4. DRY operation

DRY operation is performed according to the difference

between room temperature and the setup temperature as shown below.

In DRY operation, fan speed is controlled in order to

prevent lowering of the room temperature and to avoid air flow from blowing directly to persons.

[˚C]

1.0

L– (W5)

(W5+W3) / 2

0.5

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

2) Starts operation under conditions in the left figure according to the temperature difference between the room temperature and the setup temperature (Tsc).

Setup temperature (Tsc) = Set temperature on remote controller (Ts) + (0.0 to 1.0)

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

Tsc

SUL (W3)

Fan speed

– 37 –

Item

Operation flow and applicable data, etc.

Description

2. Indoor fan motor control



RAS-M10SKCV



RAS-M13SKCV



RAS-M16SKCV



RAS-M22SKCV



RAS-M22NKCV1



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

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

COOL ON

Fan speed setup

AUTO

Air volume AUTO

[˚C]

+2.5

+2.0

+1.5

+1.0

MANUAL

Indication

L L+ M M+ H

M+(WB)

∗3 ∗4 ∗5

(Fig. 1)

Fan speed

(L + M) / 2

(M + H) / 2

(Fig. 2)

∗3 : Fan speed = {(M +) –L} × 3/4 + L

∗4 : Fan speed = {(M +) –L} × 2/4 + L

∗5 : Fan speed = {(M +) –L} × 1/4 + L

* Symbols

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

∗ The fan speed broadly varies due

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

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

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

+0.5

Fan

speed

level

WF WE WD WC WB

Tsc

d e

COOL

M+

L+

L–

SUL

DRY

L+

L L– UL

SUL

RAS-M10SKCV

Fan speed

rate (rpm)

1240 630 1170 582 1140 563 1100 536 1000 469 1000 469 960 443 870 383 850 369 760 309 760 309 700 269 650 236 500 135 500 135

L(W6)

(Linear approximation from M+ and L)

(Ta ble 1) Indoor fan air flow rate

RAS-M13SKCV

Air flow

(m3/h)

Fan speed

rate (rpm)

1240 630 1240 630 1190 596 1140 563 1040 496 100 469

960 443

870 383 850 369 760 309 760 309 700 269 650 236 500 135 500 135

Air flow

(m3/h)

Fan speed

rate (rpm)

RAS-M16SKCV

Air flow

(m3/h)

1470 743 1470 743 1440 723 1390 691 1250 601 1190 563 1120 518 970 421 950 408 890 370 870 357 810 318 750 280 600 183 500 119

RAS-M22SKCV

Fan speed

rate (rpm)

1200 1101 1200 1101 1200 1101 1180 1079 1080 968 1020 902 980 858 850 713 810 669 800 658 760 614 700 547 650 492 500 325 500 325

Air flow

(m3/h)

RAS-M22NKCV1

Fan speed rate (rpm)

1300 850 1230 790

1150 750

1050 650 1000 610 900 530 900 530 850 490

Air flow

(m3/h)

—— —— ——

——

—— ——

– 38 –

Item

Operation flow and applicable data, etc.

Description

3. Outdoor fan motor control

1) Outdoor unit

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

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

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

Air conditioner ON

(Remote controller)

Indoor unit controller

operation command (Outdoor fan control)

2) Fan speed ³ 400

when the motor stopped.

YES

OFF status of

fan motor continues.

Fan motor ON

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

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

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

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

3) Fan lock

YES

Air conditioner

OFF

4) Motor operates as shown in the table below.

Cooling operation, dry operation

Compressor revolution (rps)

Outdoor temp. sensor

Econo operation

TO is abnormal

TO < 38°C

38°C

1 to 2 units 3 to 4 units

38°C

TO < 38°C

Alarm

display

20.3 ~50.3 ~71.2 71.2~

390 (rpm) 770 (rpm) 770 (rpm) 770 (rpm) 390 (rpm) 670 (rpm) 670 (rpm) 770 (rpm) 390 (rpm) 510 (rpm) 670 (rpm) 770 (rpm) 390 (rpm) 670 (rpm) 670 (rpm) 670 (rpm) 390 (rpm) 670 (rpm) 670 (rpm) 670 (rpm) 510 (rpm) 670 (rpm) 670 (rpm) 670 (rpm)

TO : Outdoor temperature sensor

– 39 –

Item

Operation flow and applicable data, etc.

Description

4. Capacity control

1) Four indoor units from A to D determine the respective instruction revolutions from the difference between the remote controller setting temperature (Ts) and the indoor temperature (Ta), and transmit this to the outdoor unit.

2) The outdoor unit receives the instructions from the indoor units, and the inverter operates the compressor at the calculated revolutions.

3) The compressor operation range in each operating mode is shown in the table below.

Indoor unit A

Indoor unit B

Indoor unit C

Indoor unit D

Operation mode

COOL

operating unit

No.of

1 unit

2 units 3 units 4 units

Outdoor unit

Inverter

Compressor

Combination

of indoor units

M10 M13 M16 M22

∗

Compressor revolution

(rps)

15 to 28 15 to 43 15 to 53 15 to 62 15 to 66 23 to 72 23 to 77

5. Current release control

Outdoor unit inverter main

circuit control current

Operating current ≤

Setup value

Yes

Capacity control continues.

Outdoor temp.

∗ : In case that any multiple indoor units are combined.

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

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

Outdoor temp. To

Setup of current release point

Reduce compressor speed

Current decrease

Cooling current release value

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

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

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

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

45°C 40°C

44.5°C

39.5°C

7.35A

9.60A

14.2A

– 40 –

Item

Operation flow and applicable data, etc.

Description

5. Current release control

Please be reminded that all air conditioners installed at HDB flats are subjected to an amp restriction of 11 A.

It is the installer’s responsibility to have the current release control set correctly for the type of HDB flat in which the IMS unit is installed.

The figure below shows how the connector can be arranged for the appropriate setting.

Maximum current switch connector

6. Louver control

1) Louver

position



RAS-M10SKCV,



RAS-M13SKCV,



RAS-M16SKCV,



RAS-M22SKCV



This function controls the air direction of the indoor unit.

• The position is automatically controlled according to the operation mode.

• The set louver position is stored in memor y by the microcomputer, and the louver returns to the stored position when the next operation is performed.

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

Louver position in cooling operation

Mis-wiring (Mis-piping) check connector (color: red)

Maximum current switch connector (color: blue)

11 A

Full operation (Delivery)

Open

short

2) Air direction adjustment

3) Swing

• Swing operation is performed in width 35° with the stop position as the center.

• If the stop position exceeds either upper or lower limit position, swing operation is performed in width 35° from the limit which the stop position exceeded.

Initial setting of “Cooling storage position”Louver : Directs downward (35.3˚)

Air direction

Horizontal

blowing

Inclined blowing

Blowing

downward

– 41 –

Inclined blowing

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

Horizontal

blowing

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

Item

Operation flow and applicable data, etc.

Description

7. ECO operation

When pushing [ECO] button on the remote controller, an Economic operation is performed.

1. Indoor unit

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

+6.5 +6.0 +5.5 +5.0 +4.5 +4.0 +3.5 +3.0 +2.5 +2.0 +1.5 +1.0 +0.5 TSC –0.5 –1.0

–2.0

1H 2H 3H 4H Time

1) The control target temperature increases 0.5°C per hour up to 2°C starting from the set temperature when ECONO has been received.

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

ZoneTA

Frequency

Dry Mac

12 11 10

9 8 7 6 5 4 3 2

∗12 ∗11 ∗10

∗9 ∗8

Min

OFF

FAN

and can change every speed.

Fan speed depends on presetting

12 (DRY max - COOL min) / 6 x 5 + COOL min.

∗ ∗ 11 (DRY max - COOL min) / 6 x 4 + COOL min. ∗ 10 (DRY max - COOL min) / 6 x 3 + COOL min.

Cool min.

DRY max.

2. Outdoor unit

While the indoor units operate in two or more rooms in cooling mode, if ECO operation is selected in one room at least, the maximum revolution speed of the compressor is limited to 68 rps.

8. Temporary operation

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

Filter lamp ON

Did you push [RESET] button

for 3 seconds or more?

YES

Did you push [RESET] button

for 10 seconds or more?

Switch to [AUTO RESTART] control.

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

M10SKCV M13SKCV M16SKCV M22SKCV M22NKCV1

10 10 10 10 10 35 37 35 50 34

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

2) When keeping [RESET] button pushed for 3 seconds or more, “beep” sound is heard and [AUTO RESTART] control is changed.

YES

Push RESET button.

3) When keeping [RESET] button pushed for 10 seconds or more, “beep” sound is heard and the temporary [COOL]

Temporary [AUTO] operation

operation starts.

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

YES

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

Temporary [COOL] Operation

– 42 –

Item

Operation flow and applicable data, etc.

Description

9. Self-cleaning function



RAS-M10SKCV,



RAS-M13SKCV,



RAS-M16SKCV,



RAS-M22SKCV



Unit now performing cooling or dry operation

Push STOP button

Only timer indicator lights, and Self-cleaning operation starts

Time set now elapses

Operation stops

1. Purpose

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

Self-cleaning operation

When the cooling or dry operation shuts down, the unit automatically starts the Self-cleaning operation which is then performed for the specified period based on duration of the operation which was performed prior to the shutdown, after which the Self-cleaning operation stops.

2. Operation

1) When the stop signal from the remote controller or timer-off function is received, only the timer indicator lights.

2) The period of the Self-cleaning operation is determined by the duration of the operation performed prior to the reception of the stop code.

3) After the Self-cleaning operation has been performed for the specified period, the unit stops operating.

• During Self-cleaning operations: The louver opens slightly.

Self-clean operation times

Operation mode

Cooling: Auto (cooling) Dry

Auto (fan only) Shutdown

Operation time Self-cleaning operation time

Up to 10 minutes 10 minutes or longer 30 mins.

No Self-cleaning operation performed

No Self-cleaning operation performed (0 minutes)

• To stop an ongoing Self-cleaning operation at any time Push the start/stop button on the remote controller twice during the Self-cleaning operation.

(After pushing the button for the first time, push it for the second time without delay (within 10 minutes).)

– 43 –

Item

Operation flow and applicable data, etc.

Description

9. Self-cleaning

• Self-cleaning diagram

function



RAS-M10SKCV,



RAS-M13SKCV,



RAS-M16SKCV,



RAS-M22SKCV



Operation

display

FCU fan

FCU louver

Timer display

Compressor

CDU fan

ON OFF OFF

rpm is depend on presetting. (500 rpm)

depend on presetting ON depend on presetting

depend on presetting per OFF OFF

Cool mode or dry mode

operation more than 10 mins.

ON ON OFF

OPEN OPEN (12.7°) CLOSE

ON or OFF ON or OFF

of timer function. of timer function.

ON or OFF

room temperature.

ON or OFF

room temperature.

Self-cleaning mode

operate 30 mins.

Turn off by remote controller

or timer-off function.

Automatically turn-off.

Operation time

– 44 –

Item

Operation flow and applicable data, etc.

Description

10. Self-cleaning operation cancel



RAS-M10SKCV,



RAS-M13SKCV,



RAS-M16SKCV,



RAS-M22SKCV



Setting the clean operation cancel

Add J201 of the indoor P.C. board assembly. * This cancels the auto restart function.

Hold down the [RESET] button on the indoor unit for at least 3 seconds but not more than 10 seconds.

The indoor unit’s buzzer emits three beeps.

This completes the clean operation cancel setting.

Setting the clean operation

Hold down the [RESET] button on the indoor unit for at least 3 seconds but not more than 10 seconds.

NOTE:

Once J201 is added, the [RESET] button on the unit is designated for CLEAN OPERATION (Set/Cancel), therefore the [RESET] button can not be used for the selection (Set/Cancel) of AUTO RESTART function.

∗ J201 will be near the MCU so take

steps to ensure that it will not be exposed to excessive of heat.

Also take care to avoid solder bridging with the surrounding components.

The indoor unit’s buzzer emits three beeps, and the OPERATION indicator flashes at 5 Hz intervals.

This completes the clean operation setting.

Indoor P.C. board

J201

C24

– 45 –

Item

Operation flow and applicable data, etc.

Description

11. Remote-A or B selection



RAS-M10SKCV,



RAS-M13SKCV,



RAS-M16SKCV,



RAS-M22SKCV



Setting the remote- A or B selection.

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

1. Remote Controller B Setup.

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

2) Point the remote controller at the indoor unit.

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

4) Push MODE button during pushing CHK button. “B” will show on the display and “00” will disappear

and the air conditioner will turn OFF. The Remote Controller B is memorized.

Note :

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

2. Remote Controller A has not “A” display.

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

“B” Display

1. Purpose

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

2. Description

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

3. Operation

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

AUTO

“00” Display

2. Setting the unit

1) Push the RESET button to star t automatic operation on indoor unit.

2) Push the was set in step 1 to stop the air conditioner. (This operation will change the setting to “B”.)

3) Check that the remote controller operates the indoor unit.

button of the remote controller that

– 46 –

Item

Operation flow and applicable data, etc.

Description

11. Remote-A or B selection

(RAS-M22NKCV1)

Setting the remote controller

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

Remote Controller B Setup.

• Enter the battery.

• Push the [CHK] button by something with thin edge. ([00] is displayed.)

• If [MODE] button is pushed while pushing [CHK] button, the small [B] is displayed at the right of the setting temperature indication section.

* To reset [A] setting, push the [MODE] button

again while pushing the [CHK] button.

1. Purpose

This operation is to operate only one

indoor unit using one remote controller.

2. Description

When operating one indoor unit in a

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

3. Operation

The indoor unit on which the remote

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

[MODE] button

[CHK] button

Indoor unit B Setup.

1) Tu rn the circuit breaker of the main power switch off before setting the selector switch.

2) Remove the Air inlet grille and Front panel.

(Refer to Chapter 12-1, procedure

3) Open the Electrical part cover (Refer to Chapter 12-1, procedure

the jumper (J67) with only the nippers for B setting.

, page 112)



, page 114), then cut



CAUTION

Do not use any other sharp tools (such as cutters, pliers, or the like). Such tools may cause breakage or damage.

– 47 –

Item

Operation flow and applicable data, etc.

Description

12. QUIET mode

13. COMFORT SLEEP

1. Indoor unit

When the [QUIET] button is pushed, the fan of the indoor unit will be restricted the revolving speed at speed L-until the [QUIET] button is pushed once again (cancel Quiet mode).

2. Outdoor unit

While the indoor units operate in two or more rooms in cooling mode, if QUIET mode is selected in one room at least, the maximum revolution speed of the compressor is limited to 73 rps.

1. Indoor unit

• The preset temperature will increase as show on ECO operation (Item No. 7)

• Push the [COMFORT SLEEP] button to choose the operating hours. Repeat pushing to select the hours. (1hr, 3hr, 5hr or 9hr)

• If the [COMFORT SLEEP] button is pushed again means cancel comfort sleep mode.

2. Outdoor unit

While the indoor units operate in two or more rooms in cooling mode, if Comfort Sleep is selected in one room at least, the maximum revolution speed of the compressor is limited to 73 rps.

Quiet mode is the system which controls the revolving speed of indoor fan to work constantly at lower than speed L.

In addition, noise level of indoor unit is less than usual.

Remarks :

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

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

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

The principles of comfort sleep mode are:

• Quietness for more comfortable when room

temperature reaches setting temperature.

• Save energy by changing room temperature

automatically.

• The air condition can shut down by itself

automatically.

Remarks:

1. Comfort sleep mode will not operate in dry mode and fan only mode.

14. Short timer



RAS-M10SKCV,



RAS-M13SKCV,



RAS-M16SKCV,



RAS-M22SKCV



In the normal condition, after switching on the circuit breaker, 3-minute delay time for compressor is set.

PRESET

ONE-TOUCH

QUIET

SWING

TIMER

SLEEP

CHK

FAN

TEMP

MODE

COMFORT

SLEEP

FIX Hi-POWER ECO

OFF

FILTER

CLOCK

Purpose

To start the unit immediately for the pur pose of testing, trial...etc, short timer can be used for maintenance of the unit.

Short Timer Setting

Push [ ] button to tur n the unit OFF.



Set the operation mode or plasma air



purifier on the remote controller without sending the signal to the unit.

Use the tip of the pencil to push the [CHK]



button and hold, “00” will show on display, then push [SET] button to make “00” disappear.

Push [ ] button to turn the unit ON.



When short timer is activated, all setting on



the remote indicates immediately, besides,

CLR

SET

all indicatiors on front panel turn ON continuously for 3 seconds.

– 48 –

Item

Operation flow and applicable data, etc.

Description

15. One-Touch comfort



RAS-M10SKCV,



RAS-M13SKCV,



RAS-M16SKCV,



RAS-M22SKCV



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

Fan operation

* AUTO/L: Fan operates depending on the setting

temperature and room temperature. During the One Touch Comfort mode if the indoor unit

receives any signal with other operation mode, the unit will cancel the comfort mode and operates according to the signal received.

16. Hi POWER mode

([Hi POWER] button on the remote controller is pushed)

When [Hi POWER] button is pushed while the indoor unit is in Auto, Hi POWER mark is indicated on the display of the remote controller and the unit operates as follows.

1. Automatic operation

• The indoor unit operates according to the current operation.

2. Cooling operation

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

The indoor unit’s fan speed level increases 1 tap.

3. The Hi POWER mode cannot be set in Dry operation.

AUTO

*AUTO/L L

01225

Time after operation starts (min.)

When an indoor unit receives “One T ouch Comfort Signal” from the remote controller, the indoor unit operates as follows.

1) Air conditioner starts to operate when the signal is received, even if the air conditioner was OFF.

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

3) Target temperature is 24°C.

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

5) Fan is controlled as shown in the leftf.

17. FILTER indicator



RAS-M10SKCV,



RAS-M13SKCV,



RAS-M16SKCV,



RAS-M22SKCV



When the elapsed time reaches 1000 hours the FILTER indicator lights. After cleaning the filters, turn off the FILTER indicator.

How to Turn Off FILTER Indicator

Push [RESET] button on the indoor unit.

NOTE :

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

When you want a temporary operation while the FILTER lamp lights, push [RESET] button to turn off the FILTER lamp. (See page 42)

17. FILTER indicator (RAS-M22NKCV1)

Filter check lamp

When the elapsed time reaches 1000 hours, the filter check lamp indicates. After cleaning the filters, turn off the filter check lamp.

How to turn off filter check lamp

Push [RESET] button on the indoor unit.

NOTE :

If [RESET] button is pushed while the filter check lamp is not indicating, the indoor unit will start the Automatic Operation.

– 49 –

9-3. Auto Restart Function

(RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV)

This indoor unit is equipped with an automatic restarting function which allows the unit to restart operating with the set operating conditions in the event of a power supply being accidentally shut down.

The operation will resume without warning three minutes after power is restored. This function is not set to work when shipped from the factory. Therefore it is necessary to set it to work.

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

To set the auto restart function, proceed as follows: The power supply to the unit must be on ; the function will not set if the power is off. Push the [RESET] button located in the center of the front panel continuously for 3 seconds. The unit receives the signal and beeps 3 times. The unit then restarts operating automatically in the event of power supply being accidentally shut down.

• When the unit is standby (Not operating)

Operation

Push [RESET] button for more than 3 seconds. (Less than 10 seconds)

Hi POWER FILTER PAP TIMER OPERATION

RESET

• When the unit is in operation

Operation

Push [RESET] button for more than 3 seconds. (Less than 10 seconds)

Motions

The unit is on standby.

↓

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

↓ After approx. 3 seconds,

The unit beeps 3 times The green indicator flashes and continues to operate. for 5 seconds.

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

Motions

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

↓

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

↓ After approx. 3 seconds,

The unit beeps 3 times. The green indicator flashes

for 5 seconds.

Hi POWER FILTER PAP TIMER OPERATION

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

RESET

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

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

– 50 –

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

To cancel auto restart function, proceed as follows : Repeat the setting procedure : the unit receives the signal and beeps 3 times. The unit will be required to be turned on with the remote controller after the main power supply is turned off.

• When the system is on standby (not operating)

Operation

Push [RESET] button for more than 3 seconds. (Less than 10 seconds)

Hi POWER FILTER PAP TIMER OPERATION

RESET

• When the system is operating

Operation

Push [RESET] button for more than 3 seconds. (Less than 10 seconds)

Motions

The unit is on standby.

↓

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

↓ After approx. 3 seconds, The unit beeps 3 times and continues to operate. If the unit is not required to operate at this time, push [RESET]

button once more or use the remote controller to turn it off.

Motions

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

↓

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

↓ After approx. 3 seconds, The unit beeps 3 times.

Hi POWER FILTER PAP TIMER OPERATION

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

RESET

9-3-3. P ower Failure During Timer Operation

When the unit is turned off because of power failure during timer operation, the timer operation is cancelled. In that case, set the timer operation again.

NOTE :

The Everyday Timer is reset while a command signal can be received from the remote controller even if it stopped due to a power failure.

– 51 –

9-4. Auto Restart Function (RAS-M22NKCV1)

The operation will resume without warning 3 minutes after power is restored. This function is not set to work when shipped from the factory. Therefore it is necessary to set it to work.

9-4-1. How to Set the Auto Restart Function

• When the unit is standby (Not operating)

Operation

Push [RESET] button for more than 3 seconds.

RESET

TEMPORARY button

• When the unit is in operation

Operation

Push [RESET] button for more than 3 seconds.

Motions

The unit is on standby.

↓

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

↓ After approx. 3 seconds, The unit beeps 3 times The lamp changes from

and continues to operate. green to orange. If the unit is not required to operate at this time, push [RESET]

button once more or use the remote controller to turn it off.

Motions

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

↓

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

↓ After approx. 3 seconds,

RESET

TEMPORARY button

The unit beeps 3 times. If the unit is required to operate at this time, push [RESET] button

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

• While the function is being set, if the unit is in operation, the orange lamp is on.

• This function can not be set if the timer operation has been selected.

• When the unit is turned on by this function, the louver will not swing even though it was swinging automatically before shutting down.

• While the filter check lamp is on, the [RESET] button has the function of filter reset button.

– 52 –

9-4-2. How to Cancel the Auto Restart Function

• When the unit is on standby (not operating)

Operation

Push [RESET] button for more than 3 seconds.

RESET

TEMPORARY button

• When the unit is operating

Operation

Push [RESET] button for more than 3 seconds.

Motions

The unit is on standby.

↓

The unit starts to operate. The orange lamp is on.

↓ After approx. 3 seconds,

The unit beeps 3 times The lamp changes and continues to operate. from orange to green.

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

Motions

The unit is in operation. The orange lamp is on.

↓

The unit stops operating. The orange lamp is turned off.

↓ After approx. 3 seconds,

RESET

TEMPORARY button

The unit beeps 3 times. If the unit is required to operate at this time, push [RESET] button

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

• While this function is being set, if the unit is in operation, the orange lamp is on.

9-4-3. P ower Failure During Timer Operation

When the unit is in Timer operation, if it is turned off because of power failure, the timer operation is cancelled. Therefore, set the timer operation again.

– 53 –

9-5. Remote Controller (RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV)

5 3

5 2

9-5-1. Remote Controller and Its Functions

1 Infrared signal emitter 2 Start/Stop button 3 Mode select button (MODE) 4 Temperature button (TEMP .) 5 Fan speed button (FAN) 6 Swing louver button (SWING) 7 Set louver button (FIX) 8 ON timer button (ON)

9 OFF timer button (OFF) 10 Sleep timer button (SLEEP ) 11 Setup button (SET) 12 Clear button (CLR) 13 Memory and P reset button (P RESET) 14 One touch button (ONE-TOUCH) 15 High power button (Hi-P OWER) 16 Economy button (ECO) 17 Quiet button (QUIET)

13 14 17

6 8

10 19

PRESET

ONE-TOUCH

QUIET

SWING

TIMER

SLEEP

CHK

FAN

TEMP

MODE

COMFORT

SLEEP

FIX Hi-POWER ECO

OFF

FILTER

CLOCK

CLR

SET

18 Comfort sleep button (COMFORT SLEEP ) 19 Filter reset button (FILTER) 20 Clock reset button (CLOCK) 21 Check button (CHK)

9-5-2. Operation of Remote Controller

1. ONE-TOUCH

Push the “ONE-TOUCH” button for fully automated operation that is customised to the typical consumer preferences in your region of the world.

The coutomised settings control temperature air flow strength, air flow direction and other settings to provide you alternate contact with “ONE-TOUCH” of the button.

If you prefer other settings you can select from the many other operation functions of your Toshiba unit.

Push ONE-TOUCH: Start the operation.

2. AUTOMATIC OP ERATION

To automatically select cooling or fan only operation.

1. Push MODE: Select A.

2. Push

TEMP

MODE: Select A.

3. COOLING / FAN ONLY OP ERATION

To automatically select cooling or fan only operation.

1. Push MODE: Select Cool or Fan only .

2. Push

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

TEMP

MODE: Set the desired temperature. Cooling: Min. 17°C, Fan only: No temperature indication.

– 54 –

4. DRY OP ERATION (COOLING ONLY)

For dehumidification, a moderate cooling performance is controlled automatically.

1. Push MODE: Select Dry [ ].

2. Push

TEMP

MODE: Set the desired temperature.

5. Hi P OWER OP ERATION

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

Push Hi POWER: Start and stop the operation.

6. ECO OP ERATION

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

Push ECO: Start and stop the operation.

Note: Cooling operation; the set temperature will increase automatically 1 degree/hour for 2 hours

(maximum 2 degrees increase).

7. TEMP ORARY OP ERATION

In case of the misplaced or discharged remote controller.

• Pushing the RESET button, the unit can start or stop without using the remote controller.

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

8. TIMER OP ERATION

Setting the ON Timer

Push ON : Set the desired ON timer.

Push Push

SET

: Set the timer.

CLR

: Cancel the timer.

2 3

Push

Push Push

Setting the OFF Timer

OFF

: Set the desired OFF timer.

SET

: Set the timer.

CLR

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

Setting Everyday Timer

Push

: Set the ON timer.

OFF

: Set the OFF timer.

34Push

SET

Push (

button during the

or ) mark flashing.

• During the every day timer is activated, both arrows are indicated. ( or ).

Note:

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

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

– 55 –

9. P RESET OP ERATION

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

1. Select your preferred operation.

2. Push and hold PRESET for 3 seconds to memorize the setting. The mark [ ] displays.

3. Push PRESET : Operate the preset operation.

10. AUTO RESTART OP ERATION

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

Setting

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

• Do not operate ON timer and OFF timer.

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

11. QUIET OP ERATION

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

Push QUIET : Start and stop the operation.

Note: Under certain conditions, QUIET operation may not provide adequate cooling due to low sound

features.

12. COMFORT SLEEP OP ERATION

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

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

Note: The cooling operation, the set temperature will increase automatically 1 degree/hour for 2 hours

(maximum 2 degrees increase).

13. SLEEP TIMER OP ERA TION

To start the sleep timer (OFF timer) operation

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

– 56 –

9-5-3. Name and Functions of Indications on Remote Controller

[Display]

All indications, except for the clock time indicator, are displayed by pushing [ ] button.

1 Transmission mark

This transmission mark controller transmits signals to the indoor unit.

indicates when the remote

2 Mode indicator

Indicates the current operation mode. (AUTO : Automatic control, A : Auto changeover control,

: Cool, : Dry)

3 Temperature indicator

Indicates the temperature setting. (17°C to 30°C)

4 FAN speed indicator

Indicates the selected fan speed. AUTO or five fan speed lev els (LOW

, HIGH ) can be shown.

MED Indicates AUTO when the operating mode is either

AUTO or

: Dr y.

, LOW+ , MED ,

5 TIMER and clock time indicator

The time setting for timer operation or the cloc k time is indicated.

The current time is always indicated except during TIMER operation.

6 Hi P OWER indicator

Indicates when the Hi POWER operation starts. Push the Hi POWER button to start and push it again

to stop the operation.

7 (P RESET) indicator

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

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

Push another button to turn off the mark.

mark is shown when holding down the button

8 ECO indicator

Indicates when the ECO is activated. Push the ECO button to start and push it again to

stop operation.

9 A, B change indicator remote controller

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

10 Comfort sleep

Indicates when comfort sleep is activaled. Push comfort sleep button to select the comfort

sleep.

11 Quiet

Indicates when quiet is activated. Push quiet button to start and push it again to stop

operation.

12 One-Touch

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

13 Swing

Indicates when louver swings. Push swing button to start the swing operation and

push it again to stop the swing operation.

– 57 –

9-6. Remote Controller (RAS-M22NKCV1)

9-6-1. Remote Controller and Its Functions

1 Infrared signal emitter

Transmits a signal to the indoor unit.

2 START/STOP button [ ]

Push the button to start operation. (A receiving beep is heard.)

Push the button again to stop operation. (A receiving beep is heard.)

If no receiving sound is heard from the indoor unit, push the button twice.

3 Mode select button [MODE]

Push this button to select a mode. Each time you push the button, a mode is selected in

a sequence that goes from A : Auto changeover control, A. (A receiving beep is heard.)

: Cool, : Dry, : Fan only and back to

4 Temperature button [TEMP .]

..... The set temperature is increased up to 30°C.

..... The set temperature is droped down to 17°C.

(A receiving beep is heard.)

5 Fan speed button [FAN]

Push this button to select the fan speed. When you select A UTO, the fan speed is automati-

cally adjusted according to the room temperature. You can also manually select the desired fan speed

from among five settings. (LOW HIGH

, LOW+ , MED , MED+ ,

) (A receiving beep is heard.)

12 Sleep timer button (SLEEP )

Push this button to set the OFF timer . (1, 3, 5 or 9 hours) (A receiving beep is heard.)

13 High power button (Hi P OWER)

Push this button to start high power operation. (A receiving beep is heard.)

14 ECO timer button [ECO]

Push this button to start ECO operation. (A receiving beep is heard.)

15 Quiet button [QUIET]

Push this button to start quiet operation. (A receiving beep is heard.)

16 Comfort sleep button [COMFORT SLEEP ]

ush this button to start the comfort sleep operation. OFF timer is necessary to set together (1, 3, 5 or 9 hours). (A receiving beep is heard.)

17 P RESET button

Push this button to operate the air conditioner according to the settings memorized. (A receiving beep is heard.)

Or push the button for more than 4 seconds to memorize the setting indicated on the remote controller and

mark is indicated.

18 Automatic operation button [AUTO]

Push this button to operate the air conditioner automatically. (A receiving beep is heard.)

6 Auto louver button [SWING]

Push this button to swing the louver. (A receiving beep is heard.)

Push the button again to stop the louver swinging. (A receiving beep is heard.)

7 Set louver button [FIX]

Push this button again to adjust the air flow direction. (A receiving beep is heard.)

8 ON timer button [ON]

Push this button to set the ON timer .

9 OFF timer button [OFF]

Push this button to set the OFF timer .

10 Reserve button [SET]

Push this button to reserve setting of time, ON timer or OFF timer. (A receiving beep is heard.)

11 Cancel button [CLR]

Push this button to cancel the ON timer and OFF timer. (A receiving beep is heard.)

18 15

– 58 –

9-6-2. Name and Functions of Indications on Remote Controller

[Display]

All indications, except for the clock time indicator, are indicated by pushing the button.

1 Transmission mark

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

) indicates when the

2 Mode display

Indicates the current operation mode. (AUTO : Automatic control, A : Auto changeover control,

: Cool, : Dry, : Fan only)

3 Temperature display

Indicates the temperature setting. (17°C to 30°C) When you set the operating mode to

temperature setting is indicated.

: Fan only, no

4 Louver operation display

Indicates the louver operation. (

: Fix, : Swing)

5 FAN speed display

Indicates the selected fan speed. AUTO or one of five fan speed levels

(LOW HIGH

Indicates AUTO when the operating mode is either AUTO or

, LOW+ , MED , MED+ ,

) can be indicated.

: Dry.

6 TIMER and clock time display

The time set the timer operation or clock time is indicated.

The preset time is always indicated except for TIMER operation.

7 Hi P OWER display

Indicates when the Hi POWER operation starts. Push the [Hi POWER] button to start and push it

again to stop the operation.

8 P RESET display

Flashes for 4 seconds when the [PRESET] button is pushed and hold to memorize.

mark is indicated when [PRESET] button is

pushed for more than 4 seconds. Push another button to turn off the mark.

9 ECO display

Indicates when the ECO is in operation.

10 COMFORT SLEEP display

Indicates when the COMFORT SLEEP is in operation.

Each time you push the [COMFORT SLEEP] button, the display changes in the sequence of 1, 3, 5 or 9h.

11 QUIET display

Indicates when the QUIET is in operation.

3101 2 8 4

79 5 6

• In the illustration, all indications are indicated for explanation.

During operation, only the relevant indications will be indicated on the remote controller.

– 59 –

10. INSTALLATION PROCEDURE

10-1. Installation Diagram of Indoor Units

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV

170 mm or more

Hook

Air filter

(Attach to the front panel)

1 Installation plate

Hook

65 mm or more

170

For the rear left and left piping

Wall

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

mm or more

Do not allow the drain hose to get slack.

Cut the piping hole sloped slightly.

5 Super Oxi Deo filter

6 Super Sterilizer filter

3 Batteries

8 Pan head wood screw

2 Wireless remote controller

Before installing the wireless remote controller

• Loading Batteries

1. Remove the battery cover.

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

2 Wireless remote controller

4 Remote controller holder

C L

3 Batteries

Shield pipe

Make sure to run the drain hose sloped downward.

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

Right

Rear right

Bottom right

Rear left

Bottom left

Left

Insulate the refrigerant pipes separately with insulation, not together.

8 mm thick heat resisting polyethylene foam

– 60 –

RAS-M22SKCV

ook

Hook

cushion betwee

doo

For the rear left and left piping

(Attach to the front panel.)

5 Filter

6 Filter

3 Batteries

2 Wireless remote controller

Air filter

mm or more

8 Pan head

wood screw

Installation plat

Shield pipe

4 Remote controller holder

Wall

Insert the unit and wall better o

Do not allow the drain hose to get slack

Make sure to run the drain ho sloped downward

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

Righ

Rear righ

Bottom righ

and tilt the indoor unit for

eration

Rea lef

n the in

ut the piping hole sloped slightly.

Lef

Bottom lef

Before installing the wireless remote controller

• Loading Batteries

1. Remove the battery cover.

A C

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

2 Wireless remote controller

10-2. Optional Parts, Accessories and Tools

10-2-1. Optional Installation Parts

Part Code

Indoor unit name

RAS-M10SKCV, M13SKCV 6.35 mm 9.52 mm

RAS-M16SKCV, M22SKCV, M22SKCV1 6.35 mm 12.7 mm

Parts name

Refrigerant piping

Insulate the refrigerant pipes separately with insulation, not together

Batteries

8 mm thick heat resistin polyethylene foa

Liquid side Gas side

(Outer diameter) (Outer diameter)

Q’ty

1 ea.

Shield pipe (for extension drain hose) (polyethylene foam, 6 mm thick)

– 61 –

10-2-2. Accessory and Installation Parts

Part No.





Part name (Q’ty)

Installation plate × 1

ONE-TOUCH

SWNG FIX

QUIET

TIHER

SLEEP

CHK

FILTER CLOCK

SET

Wireless remote controller × 1

PRESET FAN

ON OFF

TEMP

Hi-POWER

COMFORT

MODE

SLEEP

ECO

CLR

Part No.





Part name (Q’ty)

Remote controller holder × 1

Super Oxi Deo filter × 1

Part No.





Part name (Q’ty)

Mounting screw Ø4 × 25L × 6

Remote controller

holder mounting screw

Ø3.1 × 16L × 2

Name



Battery × 2



Super Sterilizer filter × 1

Important information and warning

Owner’s manual

Installation manual

This model is not equipped with an extension drain hose.

10-2-3. Installation/Servicing T ools

Changes in the product and components

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

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

New tools for R410A

Gauge manifold

Charge hose

Electronic balance for refrigerant charging

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

Flare tool (clutch type)

Gauge for projection adjustment

Vacuum pump adapter

Gas leakage detector

Applicable to R22 model

× ×

——

Changes

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

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

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

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

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

Used when flare is made by using conventional flare tool. Connected to conventional vacuum pump. It is necessary to use

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

Exclusive for HFC refrigerant.

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

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

– 62 –

10-3. Indoor Unit

10-3-1. Installation Place

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

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

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

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

• The indoor unit shall be installed so that the top of the indoor unit is positioned at least 2m in height.

• Also, av oid putting an ything on the top of the indoor unit.

Remote controller

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

• Do not install the remote controller in a place exposed to direct sunlight or close to a heating source, such as a stove.

• Keep the remote controller at least 1 m away from the nearest TV set or stereo equipment. (This is necessary to prevent image disturbances or noise interference.)

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

CAUTION

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

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

10-3-2. Drilling a Hole and Mounting Installation Plate

(Side view)

Reception range

Indoor unit

Remote controller

(Top view)

Indoor unit

Reception range

Fig. 10-3-1

Remote controller

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV

Drilling a hole

When install the refrigerant pipes from the rear.

Pipe hole

Ø65 mm

100 mm

Fig. 10-3-2

1. After deter mining the pipe hole position on the installation plate (

) drill the pipe hole (Ø65 mm)

at a slight downward slant to the outdoor side.

NOTE :

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

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

Mounting the installation plate

Anchor bolt holes

82.5

Installation plate

170

Pipe hole

Indoor unit

Hook

Thread

Weight

Hook

Pipe hole

Mounting screw

RAS-M22SKCV

Drilling a hole

When install the refrigerant pipes from the rear.

35 120 180 240

The center of the pipe hole is the above arrow.

Fig. 10-3-4

1. After determining the pipe hole position on the installation plate (

) drill the pipe hole (Ø65 mm)

at a slight downward slant to the outdoor side.

NOTE :

• When drilling into a wall that contains a metal

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

Mounting the installation plate

Anchor bolt holes

Hook

ine

170

2 m or more from floor

Pipe hole

the center of pipe hole

Offset 85mm from the left side edge is

Indoor unit

Hook

Thread

ine

Weight

Mounting

screw

e center of pipe hole

Pipe hole

Hook

m from the right side edge is

23mm

Dia .65mm

Offset 23mm from the right side edge is

170

the center of pipe hole

132

Dia. 65m

Pipe hole (Dia. 65mm)

Installation

plate

2m or more from floor

Fig. 10-3-3

Fig. 10-3-5

– 63 –

When the installation plate is directly mounted on the wall

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

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

3. Install the installation plate horizontally and level.

CAUTION

When installing the installation plate with mounting screw, do not use the anchor bolt hole.

Otherwise the unit may fall down and result in personal injury and property damage.

Anchor bolt

Projection 15mm or less

10-3-3. Electrical Work

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

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

NOTE :

• Wire type : More than 1.5mm²

H07RN-F or 60245 IEC66

CAUTION

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

1. Connection to fixed wiring:

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

2. Connection with power supply plug:

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

Fig. 10-3-6

5 mm dia. hole

7 Mounting screw Ø4 × 25L

Clip anchor (local parts)

Fig. 10-3-7

CAUTION

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

• In case of block, brick, concrete or similar type walls, drill 5 mm dia. holes in the wall.

• Insert clip anchors for the  mounting screws.

NOTE :

• Install the installation plate using mounting

screws between 4 to 6, being sure to secure all four corners.

NOTE :

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

10-3-4. Wiring Connection

How to connect the connecting cable

Wiring the connecting cable can be carried out without removing the front panel.

1. Remove the air inlet grille.

Open the air inlet grille upward and pull it toward you.

2. Remove the terminal cover and cord clamp.

3. Insert the connecting cable (or as according to

local regulations/codes) into the pipe hole on the wall.

4. Pull the connecting cable through the cable slot

on the rear panel so that it protrudes about 15 cm out of the front.

5. Insert the connecting cable fully into the terminal

block and secure it tightly with scre ws.

6. Tightening torque: 1.2 N•m (0.12 kgf•m)

7. Secure the connecting cable with the cord clamp.

8. Attach the terminal cover, rear plate bushing and

air inlet grille on the indoor unit.

– 64 –

CAUTION

10-3-5. Piping and Drain Hose Installation

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

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

Cord c

erminal cover

Scre

lamp

Scre

Terminal

Earth line

Connecting cab

Fig. 10-3-8

Terminal block

Fig. 10-3-9

lock

Piping and drain hose forming

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

Rear right

Rear left

Bottom left

Changing

Left

drain hose

Bottom right

Die-cutting

Right

Front panel slit

Fig. 10-3-12

1. Die-cutting front panel slit

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

2. Changing drain hose

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

Piping preparation

Connecting cable

about 15 cm

Fig. 10-3-10

10 m

10 mm

0 mm

Fig. 10-3-11

NOTE :

• WIRE TYPE : More than 1.0mm². (H07 RN-F or 60245 IEC 66)

How to remove the drain cap

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

Fig. 10-3-13

line

How to remove the drain hose

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

pull out the drain hose.

Screw

Drain hose

Fig. 10-3-14

– 65 –

How to attach the drain cap

Left-hand connection with piping

1. Insert hexagonal wrench (4 mm).

4 mm

Fig. 10-3-15

2. Firmly insert drain cap.

No gap

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

Insert a hexagon wrench (Ø4mm)

drain leakage of the drain plug may occur.

Fig. 10-3-16

How to attach the drain hose

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

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

Bend the connecting pipes so that they are positioned within 43 mm above the wall surface.

If the connecting pipes are positioned more than 43 mm above the wall surface, the indoor unit may be unstable.

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

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

Outer diameter

6.35 mm

9.52 mm

12.7 mm

Bending radius

30 mm 40 mm 50 mm

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

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV

(To the front flare)

270 mm 230 mm

Liquid side

Gas side

Fig. 10-3-19

CAUTION

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

In case of right or left piping

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

Slit

Fig. 10-3-17

In case of bottom right or bottom left piping

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

Slit

10-3-18

Fig.

RAS-M22SKCV

(To the front flare)

400 mm 300 mm

Liquid side

Gas side

Fig. 10-3-20

R30 or less (Ø6.35), R40 or less (Ø9. 52), R50 or less (Ø12. 7) Use polishing (polyethylene core or the like for bending pipe).

43 mm

Outward form of indoor unit

Use a screwdriver handle, etc.

Fig. 10-3-21

NOTE :

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

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

– 66 –

CAUTION

50 mm or more

Do not rise the drain hose.

Do not form the drain hose into the waved shape.

Do not put the drain hose end into water.

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

• Bind the auxiliary pipes (two) and connecting

cable with facing tape tightly. In case of leftward piping and rear-leftward

piping, bind the auxiliary pipes (two) only with facing tape.

Indoor unit

Auxiliary pipes

Installation plate

Fig. 10-3-22

•

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

• Carefully connect the auxiliary pipes and

connecting pipes to each other and cut off the insulating tape wound on the connecting pipe to avoid doub le-taping at the joint, moreo ver, seal the joint with the vinyl tape, etc.

• Since condensation can result in machine

performance trouble, be sure to insulate both connecting pipes. (Use polyethylene foam as insulating material.)

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

Connecting cable

10-3-7. Drainage

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

NOTE :

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

Fig. 10-3-25

2. Put water in the drain pan and make sure that the water is being drained outside.

3. When connecting extension drain hose, insulate the connection part of extension drain hose with shield pipe.

Shield pipe

10-3-6. Indoor Unit Installation

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

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

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

Hook

• For detaching the indoor unit from the installation

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

Hook here 1

Installation plate

Fig. 10-3-23

Push (unhook)

Drain hose

Inside the room

Extension drain hose

Fig. 10-3-26

CAUTION

Install the drain pipe for proper drainage. Improper drainage can result in water dripping

inside the room.

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

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

Wall

Drain guide

PushPush

Fig. 10-3-24

– 67 –

Space for pipes

Fig. 10-3-27

10-4. Installation Diagram of Indoor Unit

RAS-M22NKCV1

(Attach to the front panel)

5 Zeolite Plus sasa filter

2 Wireless remote controller

Before installing the wireless remote controller

• With the remote controller cover open, load the batteries supplied correctly, observing their polarity.

2 Wireless remote controller

6 Bio Ginko filter

170 mm or more

Air filter

8 Pan head wood screw

3 Batteries

Cover

Hook

2 Installation plate

65 mm or more

Hook

Shield pipe

4 Remote controller holder

Insulate the refrigerant pipes separately with installation, not together.

8 mm thick heat resisting polyethylene foam

170 mm or m

ore

For the rear left and left piping

Wall

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

Do not allow the drain hose to get slack.

Cut the piping hole sloped slightly.

Make sure to run the drain hose sloped downward.

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

Right

Rear right

Bottom right

Rear left

Bottom left

Left

10-4-1. Accessory and Installation Parts

Part No.







Part name (Q’ty)

Installation plate × 1

Wireless remote controller × 1

Battery × 2

Name

Owner’s manual

Installation manual

Part No.







Part name (Q’ty)

Remote controller holder × 1

Zeolite plus sasa filter × 1

Bio Gingo filter × 1

– 68 –

Part No.







Part name (Q’ty)

Mounting screw

Ø4 × 25L × 6

Flat head wood screw

Ø3.1 × 16L × 2

B label × 1

1. Setting of remote controller selector at the remote controller side

[B] of the remote controller is displayed with liquid crystal only when it is set to [B].

There is no display of [A].

• Enter the battery.

• Push the [CHK] button by something with thin

edge. ([00] is displayed.)

• If [MODE] button is pushed while pushing [CHK]

button, the small [B] is displayed at the right of the setting temperature indication section.

* To reset [A] setting, push the [MODE] button

again while pushing the [CHK] button.

2. Confirm the indoor unit can operate with the changed setting of the remote controller.

10-4-2. Check and Test Run

1. Check the unit is firmly hooked up on the installation plate.

2. Check the connecting pipes tightened securely. Confirm that there is not gas leakage.

3. Confirm that all connecting cables are secured and correct.

4. Check the pipes insulation.

5. Check the drainage.

6. Connection of the grounding wire.

7. To switch the TEST RUN (COOL) mode, push [RESET] button for 10 sec. (The beeper will make a short beep.)

RESET

[MODE] button

[CHK] button

Fig. 10-4-2

8. Operate the unit at cooling operation mode for 15 minutes or more.

Measure the temperature of the intake and discharge air. Ensure the difference between the intake temperature and the discharge one is more than 8°C.

NOTE: Three-minutes protection feature A protection feature prevents the air condi-

tioner from being activated for about 3 minutes when it is restarted immediately after operation or when the power switch is turned on.

9. Explain to the customer on the correct usage of air conditioner simple layman’s terms.

Fig. 10-4-1

– 69 –

When the installation plate is directly

Earth line

mounted on the wall

1. Securely fit the installation plate onto the wall by screwing it in the upper and lower parts to hook up the indoor unit.

2. To mount the installation plate on a concrete wall with anchor bolts, utilize the anchor bolt holes as illustrated above.

3. Install the installation plate horizontally in the wall.

CAUTION

When installing the installation plate with mounting screw, do not use the anchor bolt hole.

Otherwise the unit may fall down and result in personal injury and property damage.

Anchor bolt

10-4-3. Electrical Work

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

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

NOTE :

• Wire type :

More than 1.5mm² (H07RN-F or 245IEC66) or 1.3mm² (AWG-16)

CAUTION

• Use power specified above table.

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

1. Connection to fixed wiring:

A switch or circuit breaker which disconnects all poles and has a contact separation of at least 3 mm must be incorporated in the fixed wiring. An approved circuit breaker or switches must be used.

Projection 15mm or less

Fig. 10-4-3

5 mm dia. hole

7 Mounting screw Ø4 × 25L

Clip anchor (local parts)

Fig. 10-4-4

CAUTION

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

NOTE :

• Perform wiring work so as to allow a generous wiring capacity.

10-4-4. Wiring Connection

Air Inlet grille

Front panel

Terminal cover

Cord clamp

Screw

Terminal block

Earth line

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

• Insert clip anchors for appropriate  mounting screws.

NOTE :

• Secure four corners and lower parts of the

installation plate with 6 to 8 mounting screws to install it.

Screw

Connecting cable

Fig. 10-4-5

– 70 –

10-4-4. Installation Place

• A place which provides the spaces around the indoor unit as shown in the above diagram.

• A place where there is no obstacle near the air inlet and outlet.

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

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

10-4-5. Cutting a Hole and Mounting

Installation Plate

Cutting a hole

When install the refrigerant pipes from the rear.

CAUTION

• Direct sunlight to the indoor unit wireless

receiver should be avoided.

• The microprocessor in the indoor unit should

not be too close to r-f noise sources. (For details, see the owner's manual.)

Remote controller

• A place where there are no obstacles such as curtains, that may block the signal from the indoor unit.

• Do not install the remote controller in a place exposed to direct sunlight or close to a heating source, such as a stove.

• Keep the remote controller at least 1m apart from the nearest TV set or stereo equipment. (This is necessary to prevent image disturbances or noise interference.)

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

180

To pipe hole center

Pipe

100

hole

65m

100mm

The center of the pipe hole is above the arrow.

Fig. 10-4-7

1. After determining the pipe hole position on the mounting plate (100 mm ð ), drill the pipe hole (Ø65 mm) at a slight downward slant to the outdoor side.

NOTE :

• When drilling the wall that contains a metal

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

Mounting the installation plate

For installation of the indoor unit, use the paper pattern on the back.

(Side view)

Indoor unit

Reception range

(Top view)

Indoor unit

Remote controller

*: Axial distance

Fig. 10-4-6

Reception range

Remote controller

Fig. 10-4-8

– 71 –

How to connect the connecting cable

Slit (rear panel)

Slit (body-right)

Wiring the connecting cable can be carried out without removing the front panel.

1. Remove the air inlet grille. Open the air inlet grille upward and pull it toward

you.

2. Remove the terminal cover and cord clamp.

3. Insert the connecting cable (according to local cords) into pipe hole on the wall.

4. Take out the connecting cable through the cable slot on the rear panel so that it is exploded by about 15 cm long in the front side.

5. Insert the connecting cable fully into the terminal block and secure it by screw tightly.

6. Tightening torque: 1.2 N•m (0.12 kgf•cm)

7. Secure the connecting cable with the cord clamp.

8. Fix the terminal cover, rear plate bushing and air inlet grille on the indoor unit.

1 2 3

NOTE :

Connect the earth line to the metallic part ( mark) located at the side of 3P terminal.

Fig. 10-4-11

How to install the air inlet grille on the indoor unit.

CAUTION

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

• Check local electrical codes and also any specific wiring instructions or limitation.

Connecting cable

about 15cm

Fig. 10-4-9

Stripping length of connecting cable

123

10mm

• When attaching the air inlet grille, the contrary of removed operation is performed.

Fig. 10-4-12

10-4-6. Piping and Drain Hose Installation

In case of rightward piping

• After scribing slits of the body-right by a knife or a marking-off pin, cut them by a pair of nippers or the like.

40mm

50mm

Earth line

NOTE :

Use standed wire only.

• WIRE TYPE : More than 1.5 mm² (H07 RN-F or 245 IEC 66) or 1.3 mm² (AWG-16)

Fig. 10-4-10

Fig. 10-4-13

– 72 –

In case of downward piping

CAUTION

• After scribing the slit of the body-right by a knife or a marking-off pin, cut them by a pair of nippers or the like.

Slit (body-right)

Fig. 10-4-14

Left-hand connection with piping

Bend the connecting pipe so that it is laid within 43 mm above the wall surface.

If the connecting pipe is laid exceeding 43 mm above the wall surface, the indoor unit may unstably be set on the wall.

When bending the connecting pipe, make sure to use spring bender so as not to crush the pipe.

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

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

Indoor unit

Auxiliary pipes

Installation plate

Connecting cable

Drain hose

Fig. 10-4-16

•

Carefully arrange pipes so that any pipe does not stick out of the rear plate of the indoor unit.

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

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

•

When bending a pipe, careful do it not to crush it.

Bend the connection pipe within a radius of 30mm.

To connect pipe after installation of unit (figure)

(To the forefront of flare)

400mm

300mm

R 30mm

43mm

80˚

Liquid side

Gas side

Outward form of indoor unit

(Use polyethylene core or the like for bending pipe.)

Use the handle of screwdriver,etc.

Fig. 10-4-15

10-4-7. Drainage

1. Run the drain hose sloping downwards.

NOTE :

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

Do not rise the drain hose.

50 mm or more

Do not put the drain hose end into water.

Do not form the drain hose into the waved shape.

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

Fig. 10-4-17

2. Put water in the drain pan and make sure that the water is drained out of doors.

3. When connccting extension drain hose. insulate the connecting part of extension drain hose with shield pipe.

NOTE :

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

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

– 73 –

Drain hose

Shield pipe

Inside the room

Fig. 10-4-18

Extension drain hose

CAUTION

Arrange the drain pipe for proper drainage from the unit.

Improper drainage can result in dew-dropping.

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

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

Wall

Drain guide

Space for pipes

Fig. 10-4-19

10-4-9. How to Set Remote Controller

Selector Switch

When two indoor units are installed in the separated rooms, there is no need to change the selector switches.

Remote Controller Selector Switch

• When two indoor units are installed in the same room or the adjacent two rooms, they may be controlled simultaneously with a single remote controller.

To prevent this, set either unit and its remote controller to B setting.(Both units are set to A setting before shipment).

• The remote controller signal is not received when the indoor unit setting is different from the remote controller one.

• The A setting (or B setting) does not relate to the A room (or B room) in the installation manual of the outdoor unit.

10-4-8. Indoor Unit Fixing

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

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

3. While pressing the indoor unit onto the wall, hook it at the lower part on the installation plate.

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

Hook

• For detaching the indoor unit from the installation

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

Hook here 1

Installation plate

Fig. 10-4-20

Push

(un-hook)

1. Set the remote controller selector switch with the indoor unit

(For RAS-M22NKCV1)

1) Turn the circuit breaker of the main power switch off before setting the selector switch.

2) Remove the Air inlet grille and Front panel. (Refer to Chapter 12-1, procedure , page 109)

3) Open the Electrical part cover (Refer to chapter 12-1, procedure , page 111), then cut the jumper (J67) with only the nippers for B setting.

CAUTION

Do not use any other sharp tools (such as cutters, pliers, or the like).

Such tools may cause breakage or damage.

See Fig. 10-4-22.

Push Push

Fig. 10-4-21

Fig. 10-4-22

– 74 –

2. Set the remote controller selector switch with the remote controller

[B] is indicated on the liquid crystal display when setting remote controller selector switch to B .

[A] is not indicated on the display even if the selector switch is set to A.

1) Load the remote controller with the batteries.

2) Push the [CHECK] button using something with sharp point. (The preset temperature on the remote controller changes to [00].)

3) Push the [MODE] button while pushing the [CHECK] button, [B] is indicted at the right of the preset temperature display.

To reset the switch to the [A] setting, push the [MODE] button again while pushing the [CHECK] button.

(For remote controller of RAS-M22NKCV1, see page 46.)

10-4-10. Check and Test Operation

1. Check that the unit is firmly hooked up to the installation plate.

2. Check that the connecting pipes are tightened securely.

3. Check that there is no gas leakage. Check that all connecting cables are connected

securely and properly.

4. Check the insulations for the pipes.

5. Check the drainage.

6. Check the ground wire is connected properly.

7. To switch the operation mode to the TEST RUN (COOL), turn the switch on and push the TEMPORARY button for 10 sec. (The unit beeps shortly.)

TEMPORARY button

Fig. 10-4-23

8. Operate the unit at cooling operation mode for 15 minutes or more.

And take the temperature at the air inlet and outlet.

Ensure the temperature difference between the air inlet and outlet is more than 8°C.

NOTE: Three-minutes protection feature

This function feature prevents the unit from being activated for approximately 3 minutes when it is restarted immediately after tur ning off or when the power supply switch is turned off.

9. Check the remote controller operation.

After the test operation check, return the switch to REMOTE CONTROLLER. (Push the TEMPORARY button again to return it.)

10. Explain how to use the air conditioner properly

to the customer in professional but simple terms.

– 75 –

10-5. Which Models can be Combined

Table of models that can be connected

Indoor unit specification

10-class 13-class 16-class 22-class

RAS-M22SKCV, RAS-M22NKCV1

High Wall T ype

RAS-M10SKCV RAS-M13SKCV RAS-M16SKCV

Combinations of indoor unit (2-room connection)

Unit D Unit C Unit B Unit A

12345678910

——————————

—————————— 10-class 10-class 10-class 13-class 13-class 16-class 10-class 13-class 16-class 22-class 10-class 13-class 16-class 13-class 16-class 16-class 22-class 22-class 22-class 22-class

Combinations of indoor unit (3-room connection)

Unit D Unit C Unit B Unit A

12345678910

—————————— 10-class 10-class 10-class 10-class 10-class 13-class 10-class 13-class 13-class 16-class 10-class 10-class 10-class 13-class 13-class 13-class 16-class 13-class 16-class 16-class 10-class 13-class 16-class 13-class 16-class 13-class 16-class 16-class 16-class 16-class

11 12 13 14 15

————— 10-class 10-class 13-class 10-class 13-class 10-class 13-class 13-class 16-class 16-class 22-class 22-class 22-class 22-class 22-class

Slim Duct Type

RAS-M10SDCV RAS-M13SDCV RAS-M16SDCV RAS-M22SDCV

Combinations of indoor unit (4-room connection)

Unit D Unit C Unit B Unit A

1 2345678910

10-class 10-class 10-class 10-class 10-class 10-class 10-class 13-class 10-class 10-class 10-class 10-class 10-class 10-class 10-class 13-class 13-class 13-class 10-class 10-class 10-class 10-class 10-class 13-class 13-class 13-class 13-class 13-class 16-class 10-class 10-class 13-class 16-class 13-class 16-class 13-class 16-class 13-class 16-class 22-class

Table of models that can be used in combination

A B C D

Total

* The unit A connection port diameter is 6.35/12.7. * Use a different-diameter joint if the diameters of the connection por t and connection piping are different. * Mount the different-diameter joint on the connection port of the outdoor unit.

1 unit: 22 or 16 or 13 or 10 1 unit: 22 or 16 or 13 or 10

1 unit: 16 or 13 or 10

1 unit: 13 or 10

NOTE

A 1-room connection is not an option for the indoor units (you cannot connect only one indoor unit). A 2-room or more connection must always be used for the indoor units

(you must connect at least two indoor units).

– 76 –

10-6. Installation of Outdoor Unit

10-6-1. Installation Location

• A place which provides enough space around the outdoor unit as shown in the diagram.

• A place which can bear the weight of the outdoor unit and does not allow an increase in noise level and vibration.

• A place where the operation noise and discharged air do not disturb neighbors.

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

• A place free of combustible gases.

• A place which does not block a passageway.

• When the outdoor unit is to be installed in an elevated position, be sure to secure its feet.

• Piping connections to the outdoor unit should be arranged in the sequence A, then B, C, D, starting from the bottom. (For each piping connection, the gas pipe is on the bottom and the liquid pipe on top.)

• When multiple indoor units are to be connected to the outdoor unit, make sure the ends of the pipes and wires from each indoor unit are connected to the outdoor unit correctly. (Problems caused by indoor units being connected to the outdoor unit incorrectly are very common in multiple-unit installations.)

• The length and height differences of the connecting pipes between the indoor and outdoor units must be within the ranges indicated below.

Table10-6

Allowable piping length and height difference

Piping length

Minimum Maximum Maximum for

for 1 unit for 1 unit total of 4 units

2 m 25 m 70 m ∗1 or 50 m

∗ The outdoor unit should not be installed with one

indoor unit only. Be sure the (outdoor) unit is installed with at least two indoor units.

NOTE:

For installation, at least 3 sides should be kept away from obstacles (walls).

∗2

Height

difference

15 m

• If the outdoor unit is to be mounted on a wall, make sure the platform supporting it is sturdy enough.

The platform should be designed and manufactured to maintain its strength over a long period of time, and sufficient consideration should be given to ensuring that the outdoor unit will not fall.

• When the outdoor unit is to be mounted high on a wall, take particular care to ensure that parts do not fall, and that the installer is protected.

• When doing installation work at ground level, it is usual to make wiring and pipe connections to the indoor units, first, and then to make connections to the outdoor unit.

However, if outdoor work is difficult it is possible, instead, to make changes to the procedure.

For example, by making adjustments to the wiring and piping lengths on the inside (rather than the outside).

• A place where the drain water does not cause any problems.

CAUTION

1. Install the outdoor unit in a location where

there are no obstructions near its air intake or air outlet.

2. When the outdoor unit is installed in a place

that is always exposed to strong winds like on the coast or on a high story of a building, secure the normal fan operation using a duct or a wind shield.

3. Especially in windy areas, install the unit to

prevent the admission of wind.

4. Installation in the following places may result in

trouble. Do not install the unit in such places.

• A place full of machine oil.

• A saline-place such as the coast.

• A place full of sulfide gas.

• A place where high-frequency waves are likely to be generated, such as from audio equipment, welders, and medical equipment.

Strong wind

100mm or more

from wall

600mm or more

Fig. 10-6-1

100mm or

more from wall

600m

from

or m all

NOTE :

∗1 Indoor unit is connected by either of

RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV1.

ore

It does not contain RAS-M22SKCV.

∗2 Indoor unit contain RAS-M22SKCV.

The additional charging of refrigerant is unnecessary because this conditioner is designed with charge-less specification.

As shown in the figure, hang power cord and connecting cable downward.

– 77 –

Fig. 10-6-2

10-6-2. Refrigerant Piping Connection

Flaring

1. Cut the pipe with a pipe cutter.

Tighten the connection

Align the centers of the connecting pipes and tighten the flare nut as much as possible with your fingers.

Then tighten the nut with a wrench and torque wrench as shown in the figure.

90˚

Obliquity Roughness Warp

Fig. 10-6-3

2. Insert a flare nut into the pipe, and flare the pipe.

• Projection margin in flaring: A (Unit: mm)

Rigid (Clutch type)

Outer diameter of copper pipe

6.35

9.52

12.7

R410A

tool used

0 to 0.5 0 to 0.5 0 to 0.5

Die

Fig. 10-6-4

Conventional

tool used

1.0 to 1.5

Pipe

Imperial (Wing nut type)

Outer diameter of copper pipe

6.35

9.52

12.7

R410A

1.5 to 2.0

2.0 to 2.5

Half union

Externally threaded side

Use a wrench to secure.

Use a torque wrench to tighten.

Fig. 10-6-6

CAUTION

• Do not apply excessive force. Otherwise, the nut may break.

Outer diameter

of copper pipe

6.35 mm

9.52 mm

12.7 mm

14 to 18 (1.4 to 1.8 kgf·m) 33 to 42 (3.3 to 4.2 kgf·m) 50 to 62 (5.0 to 6.2 kgf·m)

Flare nut

Internally threaded side

Tightening torque

Flare at indoor unit side

(Unit: N·m)

• Flaring size: B (Unit: mm)

Fig. 10-6-5

Outer diameter of copper pipe

R410A R22

6.35

9.52

12.7

- 0.4

9.1 9.0

13.2 13.0

16.6 16.2

• In case of flaring for R410A with the conventional flare tool, pull it out approx. 0.5 mm more than that of R22 to adjust the specified flare size.

The copper pipe gauge is useful for adjusting projection margin size.

Flare at outdoor unit side

Fig. 10-6-7

• Tightening torque for connection of flare pipe The pressure of R410A is higher than R22.

(Approx. 1.6 times.) Therefore securely tighten the flare pipes which

connect the outdoor unit and the indoor unit with the specified tightening torque using a torque wrench.

If any flare pipe is incorrectly connected, it may cause not only a gas leakage but also trouble in the refrigeration cycle.

– 78 –

6.35

9.52

6.35

9.52

6.35

9.52

6.35

9.52 or 12.7

UNIT D

UNIT C

UNIT B

UNIT A

Outdoor unit Indoor unit

Fig. 10-6-8

A B C D

Total

1 unit: 22 or 16 or 13 or 10 1 unit: 22 or 16 or 13 or 10

1 unit: 16 or 13 or 10

1 unit: 13 or 10

Use a vacuum pump

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

1. Connect the charge hose from the manifold valve

to the service port of the gas side packed v alve.

2. Connect the charge hose to the port of the

vacuum pump.

3. Open fully the low pressure side handle of the

gauge manifold valve.

4. Operate the vacuum pump to begin evacuating.

Perform evacuating for about 35 minutes if the piping length is 70 meters (assuming a pump capacity of 27 liters per minute). Confirm that the compound pressure gauge reading is –101 kPa (–76 cmHg).

5. Close the low pressure valve handle of gauge

manifold.

6. Open fully the valve stem of the packed valves

(both sides of Gas and Liquid).

7. Remove the charging hose from the service port.

8. Securely tighten the caps on the packed valves.

* The unit A connection port diameter is 6.35/12.7. * Use a different-diameter joint if the diameters of

the connection port and connection piping are different.

* Mount the different-diameter joint on the connec-

tion port of the outdoor unit.

A 1-room connection is not an option for the indoor units (you cannot connect only one indoor unit).

A 2-room or more connection must always be used for the indoor units (you must connect at least two indoor units).

All combinations that do not exceed the “Total” number can be installed. Note that expanders and reducers may be required depending on the combination method.

Evacuating

After the piping has been connected to the indoor unit, perform the air purge.

AIR PURGE

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

Compound pressure gauge

–101kPa (–76cmHg)

Handle Lo

Charge hose (For R410A only)

Packed valve at liquid side

Pressure gauge

Manifold valve

Handle Hi (Keep full closed)

Charge hose (For R410A only)

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

Vacuum pump

Service port (Valve core (Setting pin))

Packed valve at gas side

Fig. 10-6-9

CAUTION

• IMPORTANT POINTS FOR PIPING WORK

1) Prevent dust and moisture from entering the pipes.

2) Tighten connections carefully (between pipes and unit).

3) Evacuate the air in the connecting pipes using a VACUUM PUMP.

4) Check for gas leaks at all connections.

– 79 –

Packed valve handling precautions

1012

Earth line

Connecting cable

Power cord

Earth line

Terminal block (Connecting cable)

Screw

Connecting cable

(A unit)

Connecting cable

(C unit)

Power cord

Connecting cable

(B unit)

Connecting cable

(D unit)

• Open the valve stem until it touches the stopper. Once it is in contact with the stopper, refrain from applying any more force than is necessary.

• Securely tighten the valve stem cap with torque in the following table:

Stripping length of connecting cable

Gas side

(12.7 mm)

Gas side

(9.52 mm)

Liquid side

(6.35 mm)

Service port

50 to 62 N·m

(5.0 to 6.2 kgf·m)

33 to 42 N·m

(3.3 to 4.2 kgf·m)

14 to 18 N·m

(1.4 to 1.8 kgf·m)

14 to 18 N·m

(1.4 to 1.8 kgf·m)

Hexagon wrench is required.

4mm

Fig. 10-6-10

Fig. 10-6-11

Fig. 10-6-12

Wiring Connection

1. Remove the side panel and cord clamp from the

outdoor unit.

2. Connect the connecting cable to the terminal as

identified by the matching numbers on the terminal block of indoor and outdoor unit.

3. Insert the power cord and the connecting cable

fully into the terminal block and secure it tightly with screws.

4. Use vinyl tape, etc. to insulate the cords which

are not going to be used. Locate them so that they do not touch any electrical or metal parts.

5. Secure the power cord and the connecting cable

with the cord clamp.

6. Attach the side panel on the outdoor unit.

Power source

Maximum running current

Installation fuse rating

Power cord Connecting cable

H07RN–F or 60245IEC66 (2.5 mm²) H07RN–F or 60245IEC66 (1.0 mm²)

220–240V ~50Hz

220V ~60Hz

17.1 A

20 A breaker or fuse

(all types can be used)

CAUTION

• Incorrect wiring connection may cause electrical parts to burn out.

• Be sure to comply with local regulations/codes when running the wire from outdoor unit to indoor unit. (Size of wire and wiring method etc.)

• Every wire must be securely connected.

• If incorrect or incomplete wiring is carried out, fire or smoke may result.

• Prepare the power supply for the exclusive use of the air conditioner.

– 80 –

IMPORTANT INSTRUCTION

10-8. Check and T est Run

To all installers

Please be reminded that all air conditioners installed at HDB flats are subjected to an amp restriction of 11 A.

It is the installer’s responsibility to have the current release control set correctly for the type of HDB flat in which the IMS unit is installed.

The figure below shows how the connector can be arranged for the appropriate setting.

For further details refer also to the sevice manual.

Maximum current switch connector

11A

Full operation (Delivery)

Mis-wiring (Mis-piping) check connector (color: red)

Maximum current switch connector (color: blue)

Open

Short

For R410A, use the leak detector exclusively manufactured for HFC refrigerant (R410A, R134a, etc.)

* The conventional leak detector for HCFC

refrigerant (R22, etc.) cannot be used because its sensitivity for HFC refrigerant lowers to approx. 1/40 of that manufactured exclusively for HFC refrigerant.

• Pressure of R410A becomes approx. 1.6 times that of R22. If installation work has not completely finished, gas leaks may occur in cases such as when pressure rises during operation.

• Check the flare nut connections, valve stem cap connections and service port cap connections for gas leaks with a leak detector or soap water.

Fig. 10-6-13

10-7. Grounding

This air conditioner must be grounded without fail. Grounding is necessary not only to safeguard

against the possibility of receiving an electric shock but also to absorb both the static, which is generated by high frequencies and held in the surface of the outdoor unit, and noise since the air conditioner incorporates a frequency conversion device (called an inverter) in the outdoor unit.

If the air conditioner is not grounded, users may receive an electric shock if they touch the surface of the outdoor unit and that unit is charged with static.

Flare nut connections (Indoor unit)

• Service port cap connection

• Valve stem cap connection

Flare nut connections (Outdoor unit)

Fig. 10-8-1

CAUTION

• Use a circuit breaker of a type that is not tripped by shock waves.

• Incorrect/incomplete wiring will cause electrical fires or smoke.

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

– 81 –

Mis-wiring (Mis-piping) Check

Make sure that the wiring and piping for each room have the same alphabetical code (A, B, C, D).

Connect and secure the power cord. Use the power cord/cables with thickness, type, and

protective devices specified in this manual. Insulate the unused cords (conductors) with PVC

tape.

1. Turn on the power breaker.

2. Open the side panel of the outdoor unit.

3. Set the indoor unit to COOL mode.

• It is unnecessary to set the temperature.

• Mis-wiring checks cannot be executed when the outdoor air temperature is 5°C or less.

4. Start the check.

• Disconnect the mis-wiring check connector (color: Red) from the inverter P.C. board.

5. During checks (Check time 3 to 20 minutes).

• When an error described in the table below occurrs, check that operation stops and an error code is displayed on LED.

6. After checks, the check results are displayed on LED.

• The compressor stops when a mis-wiring

(mis-pipng) error occurrs.

• Confirm the contents of the table below.

• Tur n off the power breaker.

• Correct mis-wiring/mis-piping.

• Connect the mis-wiring check connector.

• Execute the check operation again.

• Automatically return to normal operation when

conditions are normal.

7. Return to normal operation.

• To retur n to normal operation during check

operation or after a mis-wiring (mis-piping) error has been determined, connect the mis-wiring check connector.

Mis-wiring (mis-piping) check by LED Indication

• For this outdoor unit, self-mis-wiring (mis-piping) checks are possible using the five LEDs (1 Yellow + 4 Red). * LEDs (D800 to D804) are provided on the inverter P.C. board.

LED

During check

Check results

D800 D801 D802 D803 D804

lllll

¥¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥

lll

l ll lll

¤¤ ¤ ¤

l l ll

¤¤¤ ¤¤ ¤

lll

ll l ll

¤¤ ¤

¤¤

¤¤¤

¤¤¤¤

Description

Normal operation (no error) Checking A unit Checking B unit Checking C unit Checking D unit Crush/Clog of Pipe A Crush/Clog of Pipe B Crush/Clog of Pipe C Crush/Clog of Pipe D Mis-wiring/Mis-piping or Crush/Clog of Pipe A, B Mis-wiring/Mis-piping or Crush/Clog of Pipe A, C Mis-wiring/Mis-piping or Crush/Clog of Pipe A, D Mis-wiring/Mis-piping or Crush/Clog of Pipe B, C Mis-wiring/Mis-piping or Crush/Clog of Pipe B, D Mis-wiring/Mis-piping or Crush/Clog of Pipe C, D A, B, C Mis-wiring/Mis-piping A, B, D Mis-wiring/Mis-piping A, C, D Mis-wiring/Mis-piping B, C, D Mis-wiring/Mis-piping A, B, C, D Mis-wiring/Mis-piping

Pack ed valve stays closed

D800 D801D802D803 D804

Yellow

Mis-wiring (Mis-piping)

Check connector

(Color:RED)

Check mode Normal operation

Fig. 10-8-2

LED

Red

Short Open Short

LED : Light Emitting Diode, : ¤ LED ON, l: LED OFF, ¥: LED Flash

– 82 –

10-9. Useful Functions

Red

Yellow

D800 D801 D802D803 D804

LED

Self-Diagnosis by LED Indication

• For this outdoor unit, by referr ing to the 5 LED (1 Yellow + 4 Red) indicator lights, self-diagnosis is possible.

• LEDs (D800 to D804) are located on the sub-control board underneath the inverter.

Contents

Normal running IGBT short circuit, Compressor motor rear short Trouble on position detecting circuit Trouble on current detecting circuit Discharge pipe temperature sensor (TD) fault Trouble on outdoor fan Outdoor temperature sensor (TO) fault Trouble on compressor system Gas side pipe temperature sensor a (TGa) fault Gas side pipe temperature sensor b (TGb) fault Gas side pipe temperature sensor c (TGc) fault Gas side pipe temperature sensor d (TGd) fault Gas leakage, PMV fault, Sensor fault Indoor evaporator pipe sensor (TC) out of place , PMV fault, Sensor fault Indoor or outdoor mis-wiring, Gas leakage, TC sensor out of place,

PMV fault, Sensor fault Communication trouble between MCU Compressor lock Trouble on discharge temperature, Gas leakage Compressor break down

Indoor

alarm code

None

14 16 17

19 1A 1B 1C 1C 1C 1C 1C 1C 1C

1C 1C

1D 1E

LED indication

D800 D801 D802 D803 D804

lllll l

¤¤

ll l

¤¤¤

lll

¤ ¤¤¤¤ ¤ ¤¤

llll l

¤¤¤

lll

¤¤ ¤

¤¤

lll

¤¤

ll ll

lll

¤¤

l l

¤¤

l l

¤ ¤ ¤

¤ ¤ ¤ ¤ ¤

l l l

• These LEDs do not normally light.

1. If trouble occurs, LED goes on according to the contents of trouble as shown in the table above.

2. When two or more troubles occur, LEDs go on cyclically (alternately).

3. When the trouble is eliminated, LEDs go off.

¤ : LED ON, l : LED OFF

Fig. 10-9-1

– 83 –

11. HOW TO DIAGNOSE THE PROBLEM

11-1. First Confirmation

11-1-1. Confirmation of Power Supply

Confirm that the power breaker operates (ON) normally.

11-1-2. Confirmation of Power Voltage

Confirm that power voltage is AC 220–240 ±10%. If power voltage is not in this range, the unit may not operate nor mally.

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

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

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

maintaining of air conditioner.

Table 11-1-1

No.

When power breaker is turned “ON”, the operation lamp (Green) of the indoor unit flashes.

Compressor may not operate even if the room temperature is within range of compressor-ON.

In DRY and ECO mode, FAN (air flow) display does not change even though FAN (air flow select) button is operated.

Increasing of compressor motor speed stops approx. 30 seconds after operation started, and then compressor motor speed increases again approx. 30 seconds after.

Operation of air conditioner

Description

The OPERATION lamp of the indoor unit flashes when power source is turned on.

If [START/STOP] button is operated once, flashing stops. (Flashes also in power failure)

The compressor does not operate while compressor restart delay timer (3 minutes timer) operates.

The same phenomenon is found after power source has been turned on because 3 minutes timer operates.

The air flow indication is fixed to [AUTO].

For smooth operation of the compressor, the compressor motor speed is restricted to Max. 41 rps for 2 minutes, and Max. 91 rps for 2 minutes to 3 minutes, respectively after the operation has started.

– 84 –

11-2. Primary Judgment

Indoor indication

lamp flashes.

Which lamp

does flash?

To diagnose the troubles, use the following methods.

1) Judgment by flashing LED of indoor unit

2) Self-diagnosis by service check remote controller

3) Judgment of trouble by every symptom

Firstly use the method 1) for diagnosis. Then, use the method 2) or 3) to diagnose the details of troubles.

11-3. Judgment by Flashing LED of Indoor Unit

While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the contents of self-diagnosis are displayed with block on the indoor unit indication section.

Table 11-3-1

Item

Check code

——

Block display

OPERATION (Green) Flashing display (1 Hz)

OPERATION (Green) Flashing display (5 Hz)

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

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

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

Description for self-diagnosis

Power failure (when power is ON)

Protective circuit operation for indoor P.C. board

Protective circuit operation for connecting cable and serial signal system

Protective circuit operation for outdoor P.C. board

Protective circuit operation for others (including compressor)

NOTES :

1. The contents of items B and C and a part of item E are displayed when air conditioner operates.

2. When item B and C, and item B and a part of item E occur concurrently, priority is given to the block of item B.

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

– 85 –

11-4. Self-Diagnosis by Remote Controller (Check Code)

1. If the lamps are indicated as shown B to E in Table 11-4-1, e xecute the self-diagnosis by the remote controller.

2. When the remote controller is set to the service mode, the indoor controller diagnoses the operation condition and indicates the information of the self-diagnosis on the display of the remote controller with the check codes.

If a fault is detected, all lamps on the indoor unit will flash at 5Hz and it will beep for 10 seconds (Beep, Beep, Beep ... ). The timer lamp usually flashes (5Hz) during self-diagnosis.

11-4-1. How to Use Remote Controller in Service Mode

[RAS-M10SKCV, RAS-M13SKCV, RAS-M16SKCV, RAS-M22SKCV]

Push [CHECK] button with a tip of pencil to set the remote controller to the service mode.

• “ ” is indicated on the display of the remote controller.

PRESET

ONE-TOUCH

QUIET

SWING

TIMER

SLEEP

CHK

TOSHIBA

FAN

TEMP

MODE

COMFORT

PURE

FIX Hi-POWER ECO

FILTER

SLEEP

OFF

CLOCK

Push [ON ] or [OFF ] button

If there is no fault with a code, the indoor unit will beep once (Beep) and the display of the remote controller will change as follows :

• • •

• The TIMER indicator of the indoor unit flashes continuously.

(5 times per 1 sec.)

• Check the unit with all 52 check codes ( to ) as shown in Table-11-4-1.

• Push [ON ] or [OFF ] button to change the check code backward.

CLR

If there is a fault, the indoor unit will beep for 10 seconds

SET

(Beep, Beep, Beep ... ). Note the check code on the display of the remote controller.

• 2-digits alphanumeric will be indicated on the display.

• All indicators on the indoor unit will flash.

(5 times per 1 sec.)

Alphanumeric characters are used for the check codes. is 5. is 6. is A. is B. is C. is D.

Push [CLR] button.

After service finish for clear service code in memory .

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

Push [START/STOP] button to release the service mode.

• The display of the remote controller returns to as it was before service mode was engaged.

Fig. 11-4-1

– 86 –

[RAS-M22NKCV1]

Push [CHK] button with a tip of pencil to set the remote controller to the service mode.

• “ ” is indicated on the display of the remote controller.

• The timer lamp on the indoor unit flashes continuously.

(5 times per 1 sec.)

Push [TIMER ] button.

If there is no fault with a code, the indoor unit will beep once (Pi) and the display of the remote controller will change as follows:

• • •

• Check the unit with all 35 check codes (00 to 22) as shown

in Table 11-4-1.

• Push [TIMER ] button to change the check code backwards.

• Alphanumeric characters are

used for the check code. is 5. is 6.

is A. is B. is C. is D.

If there is a fault, the indoor unit will beep for 10 seconds (Beep, Beep, Beep...).

Note the check code on the display of the remote controller.

• 2-digits alphanumeric will be indicated on the display.

• All lamps on the indoor unit will flash. (5 times per 1 sec.)

Push [CLR] button.

After service finish for clear service code in memory .

• “7F” is indicated on the display of the remote controller.

Push [ ] button to release the service mode.

• The display of the remote controller returns to as it was before service mode was engaged.

Fig. 11-4-2

– 87 –

11-4-2. Caution at Servicing

1. After servicing, push the START/STOP button to return to the normal mode.

2. After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power supply again so that memory in the microcomputer returns the initial status.

Howe ver, the check codes are not deleted even if the power supply is turned off because they are stored in the fixed memory.

3. After servicing, push [CLR] button under check mode status and then send the check code “7F” to the indoor unit. The error code stored in memory is cleared.

Table 11-4-1

Block distinction

Check

code

Indoor P.C. board etc.

Not displayed

Connecting cable and serial signal

Block

Check

code

Operation of diagnosis function

Cause of operation

Short-circuit or disconnection of the room temperature sensor (TA sensor).

Being out of place, disconnection, shortcircuit, or migration of heat exchanger sensor (TC sensor)

Being out of place, disconnection, shortcircuit, or migration of heat exchanger sensor (TCJ sensor)

Lock of indoor fan or trouble on the indoor fan circuit

Trouble on other indoor P.C. boards

Return serial signal is not sent to indoor side from operation started.

1) Defective wiring of connecting cable

2) Operation of compressor thermo

Gas shortage Gas leak

Air

conditioner

status

Operation continues.

All off

Operation continues.

Remarks

Displayed when error is detected.

Flashes when trouble is detected on Return serial signal, and normal status when signal is reset.

Judgment and action

1. Check the room temp. sensor.

2. When the room temp. sensor is normal, check P.C. board.

1. Check heat exchanger sensor.

2. When heat exchanger sensor is normal, check P.C. board.

1. Check heat exchanger sensor.

2. When heat exchanger sensor is normal, check P.C. board.

1. Check the motor.

2. When the motor is normal, check P.C. board.

Replace P.C. board.

1. When the outdoor unit never operate:

1) Check connecting cable, and

correct if defective wiring.

2) Check 25A fuse of inverter

P.C. board.

3) Check 3.15A of inverter P.C.

board.

2. To display [Other] block during operation, check compressor thermo. operation and supply gas (check gas leak also).

3. Unit operates normally during check. If return serial signal does not stop between indoor terminal board 2 and 3, replace inverter P.C. board. If signal stops between indoor terminal board 2 and 3, replace indoor P.C. board.

– 88 –

Block distinction

Check

code

Block

Outdoor P.C. board

Not displayed

Outdoor P.C. board

Others (including compressor)

Check

code

Operation of diagnosis function

Cause of operation

Inverter over-current protective circuit operates. (Short time)

Position-detect circuit error or short-circuit between windings of compressor

Current-detect circuit error

Being out of place, disconnection or shortcircuit of the outdoor heat exchanger sensor (TE) or suction temp. sensor (Ts)

Disconnection or shortcircuit of discharge temp. sensor

Outdoor fan drive system error

Outdoor heat exchanger temp. sensor error

Compressor drive output error, Compressor error (lock, missing, etc.), Break down

Return serial signal has been sent when operation started, but it is not sent from halfway.

1) Compressor thermo. operation Gas shortage Gas leak

2) Instantaneous power failure

Compressor does not rotate. (Current protective circuit does not operate when a specified time passed after compressor had been activated.)

Discharge temp. exceeded 117°C

Break down of compressor

Air

conditioner

status

All off

Operation continues

All off

Operation continues

All off

Remarks

Displayed when error is detected.

——

Displayed when error is detected.

Flashes when trouble is detected on return serial signal, and normal status when signal is reset.

Displayed when error is detected.

Judgment and action

Even if trying operation again, all operations stop immediately. : Replace P.C. board.

1. Even if connecting lead wire of compressor is removed, position-detect circuit error occurred. : Replace P.C. board.

2. Measure resistance between wires of compressor, and perform short-circuit. : Replace compressor.

Even if trying operation again, all operations stop immediately. : Replace P.C. board.

1. Check sensors (TE, TS).

2. Check P.C. board.

1. Check discharge temp. sensor (TD).

2. Check P.C. board

Position-detect error, over-current protective operation of outdoor fan drive system, fan lock, etc. : Replace P.C. board or fan motor.

1. Check outdoor temp. sensor (TO).

2. Check P.C. board.

Check 5-serial LED of outdoor unit. When 20 seconds passed after start-up, position-detect circuit error occurred. : Replace compressor. Trouble on PMV.

1. Repeat Start and Stop with interval of approx. 10 to 40 minutes. (Code is not displayed during operation.) Supply gas. (Check also gas leak).

2. Unit operates normally dur ing check. If return serial signal does not stop between indoor terminal block 2 and 3, replace inverter P.C. board. If signal stops between indoor terminal block 2 and 3, replace indoor P.C. board.

1. Trouble on compressor

2. Trouble on wiring of compressor (Missed phase)

1. Check dischage temp. sensor (TD).

2. Gas leakage

3. Trouble on PMV.

1. Check power voltage. (220–230–240 V +10%)

2. Overload operation of refrigeration cycle Check installation condition (Short-circuit of outdoor diffuser).

– 89 –

11-5. Judgment of Trouble by Every Symptom

11-5-1. Indoor Unit (Including Remote Controller)

(1) Power is not turned on (Does not operate entirely) <Primary check>

1. Is the supply voltage normal?

2. Is the normal voltage provided to the outdoor unit?

3. Is the crossover cable connected properly?

4. Is the fuse (F01) blown?

RAS-M10SKCV, RAS-M13SKCV



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

Operation

Check Item

Considerable principle cause

Measures

Is OPERATION indicator flashing?

on power supply by pushing

Is fuse (F01) of indoor

control board blown?

Is voltage (DC12V or 5V)

indicated on rear of indoor

control board normal?

YES

Is it possible to turn

[START/STOP] button

on remote controller?

YES

Unit operates normally.

YES

(C01, C02, C03, R01, R02,

D01, D02, D03, D04 and T01)

Parts

are defective.

Does transmission mark

on remote controller flash

normally and is its signal

transmitted properly?

YES

Item by symptoms

Remote controller is defective.

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

Microcomputer

is defective.

Parts of a power supply

circuit defective.

Replace main

P.C. board

• Be sure to disconnect the motor connector CN31 after shut off the power supply, or it will be a cause of damage of the motor.

– 90 –

RAS-M16SKCV, RAS-M22SKCV



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

Operation

Check Item

Considerable principle cause

Measures

Is OPERATION indicator flashing?

on power supply by pushing

Is fuse (F01) of indoor

control board blown?

Is voltage (DC12V or 5V)

indicated on rear of indoor

control board normal?

YES

Is it possible to turn

[START/STOP] button

on remote controller?

YES

Unit operates normally.

YES

Parts (R04, R05, DB01,

C01, C03, IC01 and T01)

are defective.

Does transmission mark

on remote controller flash

normally, and is its signal

transmitted properly?

YES

connector between

Item by symptoms

Remote controller is defective.

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

Does fan motor

CN10 1 – 3

short-circuit?

Microcomputer

is defective.

YES

Is DC310–340V supplied

between CN10 1 – 3 ?

YES

Parts of a power supply

circuit are defective.

Replace main

P.C. board

Replace fan motor.

• Be sure to disconnect the motor connector CN31 after shut off the power supply, or it will be a cause of damage of the motor.

– 91 –

RAS-M22NKCV1



to turn on power supply

by pushing [ ] button

Unit operates normally.

Is fuse (F01) of indoor

control board blown?

Turn off

power supply once

and 5 second later,

turn it on again.

Is OPERATION

lamp flashing?

YES

Is it possible

on remote controller?

YES

on remote controller flash

normally, and is its signal

YES

Parts

(R04, C01, DB01, C50,

IC08, IC11 and T01)

are defective.

Does transmission mark

transmitted properly?

YES

Refer to “(5) Troubleshooting for Remote Controller.”

Does fan motor

connector between

1 and 3 short-circuit?

Operation

Check Item

Considerable principle cause

Measures

Item by symptoms

Remote controller is defective.

YES

Is voltage (DC 12V or 5V)

indicated on rear of indoor

control board normal?

Is the voltage

14 to 31.4V DC at C50?

YES

this problem is one step short

of power P.C. board block.

Are DC 5V,

DC 12V supplied to

main P.C. board?

YES

Turn off breaker once

and turn it on again after

YES

Refer to

<Primary check> or

removing motor.

Microcomputer

is defective.

Are DC 5V or

DC 12V supplied to

main P.C. board?

YES

Replace motor

Replace

main P.C. board.

Regulator

IC (IC08, IC11)

are defective.

• Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of damage of the motor.

– 92 –

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

Turn on power supply.

Does OPERATION lamp flash?

YES

NO NO

Is wired correctly to white and

black lead wires of terminal block?

YES

Correct wiring.

To item of

Power supply is not turned on .

– 93 –

(3) Only the indoor motor fan does not operate <Primary check>

1. Is it possible to detect the power supply voltage (AC220–240V) between  and  on the terminal block?

2. Does the indoor fan motor operate in cooling operation?

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

RAS-M10SKCV, RAS-M13SKCV



Turn off power supply once and turn it on again.

Does fan motor continue

to operate?

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

Does indoor fan operate?

YES

Change airflow level to “HIGH”.

YES

Control P.C. board failure.

Dose AC120V or

lighter voltage apply to between red

and black lead of the motor?

YES

Turn OFF the power.

Is it possible to rotate

cross-flow fan by hand properly?

YES

Turn OFF the power.

NONO

Replace main P.C. board.

Replace bearing.

Is it possible to change

airflow level to “HIGH”?

YES

Stop the operation.

by hand at the operation stop condition,

detected between 2 (Purple lead) and

3 (Blue lead) of the motor connector

When rotating the cross-flow fan

is the rotation signal (DC + 12V 0V)

(CN33) (1 pulse / 1 revolution).

YES

Motor circuit (D301, IC31, Q301)

12V power circuit (T101) failure.

– 94 –

Replace the fan motor.

Replace the P.C. board.Fan motor operates normally.

RAS-M16SKCV, RAS-M22SKCV



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

Does fan motor

continue to operate?

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

Does indoor fan operate?

YES

Change airflow level to “HIGH”.

Is it possible to

change airflow level

to “HIGH”?

YES

Is it possible to detect

DC 1V or more between

5 + and 3 – of

motor connector (CN31).

YES

Is it possible to detect

DC 310–340V between

1 + and 3 – of motor

connector (CN31).

YES

(Motor connection condition)

Is it possible to detect DC 15V

between 4 + and 3 – of

motor connector (CN31).

YES

Start to operate the

indoor unit in except

heating operation.

At this time, is it possible to

detect DC 1V or more between

+ and 3 – of motor

connector (CN31)?

YES

Is it possible to

rotate cross-flow fan by

hand properly?

YES

Turn off indoor unit and remove connector from motor.

Then push START/STOP button on remote controller to stop flashing lamp on indoor unit.

Is it possible to detect

DC 15V between 4 +

and 3 – of motor

connector (CN31).

Turn off indoor unit and

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

Start to operate the

indoor unit in except

heating operation.

At this time, is it possible

to detect DC 1V or more

between

of motor connector (CN31)?

within 15 seconds after

+ and 3 –

(Check this condition

starting unit.)

YES

Replace indoor fan motor.

Replace main P.C. board.

Replace bearing.

Fan motor operates normally.

Turn off indoor unit

and rotate cross-flow

fan by hand when the

unit is on standby.

At this time, is it possible to

detect DC 1V or more

between 5 + and 3 –

of motor connector

(CN31).

YES

– 95 –

RAS-M22NKCV1



Shut off the power supply once.

Turn the power supply.

Does the fan stop in no operating status?

YES

Start the operation with low fan setting in cool operation.

Does the fan rotate?

YES

Change the setting of cooling to high fan.

Does AC 120 V or

higher voltage apply to

between red and black lead

of fan motor?

YES

Shut off the power supply.

Does the cross flow fan rotate normally?

YES

Turn on the power supply.

Control P.C. board is defective.

supply cord connect completely?

Repair the

bearing of the fan.

Does connecting terminal,

connecting cable or power

Is not found the short wire

about connecting cable

and power cord?

YES

Thermal fuse operated due to prevent temperature rising cause of incompleted connecting.

Motor control circuit failure

(IC05, D38) or 12 V

power circuit failure (IC08).

Replace the P.C. board.

NONONO

Does the fan speed

become higher?

YES

of the motor connector (CN11) when rotating the

Normal Replace the control P.C. board.

Operation

stops.

Is the rotation signal

(DC +5 V – 0 V) output between 2

(gray lead wire) and 3 (brown lead wire)

cross flow fan by hand in no operating status?

(1 pulse/one turn)

YES

– 96 –

Replace the P.C. board.

Replace

the fan motor.

Replace the cable connecting (or power cord), thermal fuse and terminal block.

(4) Indoor fan motor automatically starts to rotate by turning on power supply (For DC fan motor in RAS-M16SKCV, RAS-M22SKCV) <Cause>

The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor. If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning

on power supply.

1. Remove the front panel. (Remove 2 screws.)

2. Remove the cover of the fan motor lead wires.

3. Check DC voltage with CN31 connector while the fan motor is rotating.

NOTE :

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

• Use a thin test rod.

Indoor fan starts rotating when power supply is turned on.

P.C. board

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

Measure voltage between 3 (GND : BLACK)

and 5 (V line : YELLOW) of motor connector (CN31)

while indoor fan motor is rotating.

DC 1.0V or more

P.C. board is defective.

Replace P.C. board. Replace motor.

Under DC 1.0V

Motor is defective.

Yellow

Black

CN31

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

– 97 –

(For AC fan motor in RAS-M10SKCV, RAS-M13SKCV) <Inspection procedure>

1. Remove the front panel. (Remove 2 screws.)

2. Remove the cover of the fan motor lead wires.

3. Check AC voltage with CN31 connector while the fan motor is rotating.

NOTE :

• Using a tester, measure the resistance value of each winding coil.

• Use a thin test rod.

AFS-220-20-4AR

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

• For P.C. board side, proceed to the item “Only indoor fan does not operate” of “Judgment of Trouble by Every Symptom” (Refer to Section 11-5-1, (3) Page-94).

WHI

CN31

3 1

BLK RED

BLK WHI

RED

BLK

WHI

RED

CN33

P.C. board

BLU

PUR

GRY

BLU PUR

GRY

3 2 1

Position (P.C. board)

Between S (Black) – Q (Red) Between S (Black) – U (White) Between Q (Red) – U (White)

BLU

PUR

GRY

Resistance value

74 ± 15 Ω 100 ± 20 Ω 174 ± 35 Ω

– 98 –

(5) Troubleshooting for remote controller <Primary check>

Check that A or B selected on the main unit is matched with A or B selected on the remote controller.

Is receiver

on indoor unit

exposed to

direct sunlight?

YES

Is there any

thyristor

fluorescent light

nearby?

YES

Push the START/STOP button.

Is transmission mark indicated?

YES

Does indoor unit

operate when moving

remote controller

near receiver or

indoor unit?

YES

Batteries are

exhausted.

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

Push RESET button on remote controller with tip of pencil.

Avoid direct sunlight.

Keep indoor unit away from thyristor fluorescent light.

Does indoor unit

start to operate by

automatic restart

function?

YES

Is radio sound affected

by remote controller

when a signal is transmitted

at distance of 5 cm

from radio?

YES

P.C. board

is defective.

Replace P.C. board.

Replace batteries.

Push the START/ STOP button

Is transmission

mark indicated?

YES

Does indoor unit

beep and operate?

YES

Normal operation

Remote controller

is defective.

Replace remote controller.

NOTE : After replacing batteries,

push the RESET button with a tip of a pencil.

– 99 –

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

(1) Outdoor unit does not operate

1) Is the voltage between  and  of the indoor terminal block varied? Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the

following diagram.

NOTE:

• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.

• Be sure to prepare a diode for judgment.

Terminal block at indoor side

Red

White

3 2

Terminal block

S5277G

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

Tester

Normal time : Voltage swings between DC15 and 60V. ..................Inverter Assembly check (11-7-1.)

Abnormal time : Voltage does not vary.

(2) Outdoor unit stops in a little while after operation started <Check procedure> Select phenomena described below.

1) The outdoor unit stops 10 to 20 minutes after operation started, and 10 minutes or more are required to restart the unit.

Gas circulation amount is down.

Measure gas pressure.

Thermo. operation of compressor

Gas shortage Gas leak Pipe clogging

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

To item of Outdoor unit does not operate.

3) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed. (Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)

Gas leak PMV is defective. Mis-wiring of connecting wires of indoor/outdoor units Clogging of pipe and coming-off of TC sensor

Refer to the service manual of the outdoor unit.

– 100 –

Toshiba RAS-M10SKCV, RAS-M22NKCV1, RAS-M22SKCV, RAS-4M26SACV, RAS-M13SKCV SERVICE MANUAL

Specifications and Main Features

Frequently Asked Questions

User Manual