Technibel GRF148MR5I, GRF198MR5I, GRF248MR5I, GRF318MR5I Technical & Service Manual

TECHNICAL & SERVICE MANUAL

OUTDOOR UNIT : GRF148MR5I

GRF198MR5I GRF248MR5I GRF318MR5I

GRF148MR5I

GRF318MR5I

GRF198MR5I GRF248MR5I

DC INVERTER MULTI-SYSTEM AIR CONDITIONER

Outdoor Model No.

GRF148MR5I

GRF198MR5I

GRF248MR5I

GRF318MR5I

Capacity

4.0kW

5.6kW

6.8kW

8.0kW

Product Code No.

GRF148MR5IAA (1 852 349 49)

GRF198MR5IAA (1 852 349 50)

GRF248MR5IAA (1 852 349 51)

GRF318MR5IAA (1 852 349 52)

REFERENCE NO. SM700740

< Applicable Indoor Units >

Wall mounted type

For details about the combination, refer to "Unit Combination Table" in the Appendix of this manual.

MCAF78MR5I MCAF98MR5I MCAF128MR5I MCAF188R5I MCAF248R5I

NOTE

Destination: Europe

RoHS

WARNING

• This product does not contain any hazardous substances prohibited by the RoHS Directive.

• You are requested to use RoHS compliant parts for maintenance or repair.

• You are requested to use lead-free solder.

FILE NO.

Do not vent R410A into atmosphere : R410A is a fluorinated greenhouse gas, covered by Kyoto Protocol, with a Global Warming Potential (GWP) = 1975.

F-GAS REGULATION (EC) No 842 / 2006

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

SPECIAL PRECAUTIONS

This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.

CAUTION

WARNING

Important! Please Read Before Starting

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

Carefully read this instruction booklet before beginning. Follow each installation or repair step exactly as shown. Observe all local, state, and national electrical codes. Pay close attention to all warning and caution notices given in this manual.

If Necessary, Get Help

These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document.

Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked. Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death. Ground the unit following local electrical codes. Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard. Install a protective leakage breaker depending on the installation location (especially a damp or humid location). If a leakage breaker is not installed, electric shock can occur.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.

When Installing

In a Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the unit’s weight. It may be necessary to construct a strong wood or metal frame to provide added support.

In a Room

Properly insulate any tubing run inside a room to prevent "sweating" that can cause dripping and water damage to walls and floors.

In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.

In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

Use the flare method for connecting tubing. Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection. Check carefully for leaks before starting the test run.

When Servicing

Tu rn the power off at the main power box (mains) before opening the unit to check or repair electrical parts and wiring. Keep your fingers and clothing away from any moving parts. Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced.

Others

Ventilate any enclosed areas when installing or testing the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas. Confirm upon completing installation that no refrigerant gas is leaking. If escaped gas comes in contact with a stove, gas water heater, electric room heater or other heat source, it can produce dangerously toxic gas.

•

2

Table of Contents

APPLICABLE INDOOR UNITS

1. OPERATING RANGE

2. SPECIFICATIONS

2-1. Unit Specifications 2-2. Major Component Specifications 2-3. Other Component Specifications

3. DIMENSIONAL DATA

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

5. PERFORMANCE DATA

5-1. Temperature Charts

6. ELECTRICAL DATA

6-1. Electric Wiring Diagrams

7. FUNCTIONS

7-1. Explanation of Functions 7-2. Protective Functions

8. TROUBLESHOOTING

8-1. Precautions before Performing Inspection or Repair 8-2. Trouble Diagnosis by Error Monitor Lamps 8-3. Checking the Outdoor System 8-4. Trouble Diagnosis of Each Part 8-5. Trouble Diagnosis of Fan Motor

9. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT

9-1. Characteristics of New Refrigerant R410A 9-2. Checklist before Servicing 9-3. Tools Specifically for R410A 9-4. Tubing Installation Procedures 9-5. In Case of Compressor Malfunction 9-6. In Case Refrigerant is Leaking 9-7. Charging Additional Refrigerant 9-8. Retro-Fitting Existing Systems

5

6

7 11 15

16

20

24

41

45 49

52 53 54 55 58

59 59 61 61 62 64 65 65

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Page

3

APPENDIX A INSTALLATION INSTRUCTIONS

APPENDIX B UNIT COMBINATION TABLES

A-1

A-2

.............................................................................

.................................................................................

Page

4

APPLICABLE INDOOR UNITS

GRF148MR5I

Multi-Outdoor Unit

Indoor Unit

YES YES YES NO NO

GRF198MR5I YES YES YES YES NO

GRF248MR5I YES YES YES YES YES

GRF318MR5I

2-Room

4-Room

4-Room YES YES YES YES YES

MCAF78MR5I MCAF98MR5I

MCAF128MR5I

MCAF188R5I MCAF248R5I

NOTE

1. The table lists the wall-mounted type of indoor units as representative models.

2. For details on the applicable indoor units other than the wall-mounted type, refer to the catalog.

5

1. OPERATING RANGE

Maximum

Minimum

Maximum

Minimum

32 °C D.B. / 23 °C W.B.

19 °C D.B. / 14 °C W.B.

27 °C D.B.

16 °C D.B.

43 °C D.B.

19 °C D.B.

24 °C D.B. / 18 °C W.B. _

D.B . /

-

15 °C W.B.

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Cooling

Heating

6

2. SPECIFICATIONS

2-1. Unit Specifications

Outdoor Unit GRF148MR5I Indoor Unit MCAF98MR5I

× 2

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor Refrigerant / Amount charged at shipment kg Refrigerant Control

4.1

925

4.0

13,600

( 2.0 to 5.0 ) ( 6,800 to 17,100 )

Shipping Volume

Cooling

1,900

Cooling

Net Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

kg kg

m

3

mm

220 to 240V Single-Phase 50Hz

198 to 264

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Air Circulation (High)

WPower Input

V A

Available Voltage Range Running Amperes

Narrow tube Wide tube

Refrigerant mm (in.)

Tube Diameter mm (in.)

42.0

45.0

0.22

569

× 790 × 285

645

× 920 × 385

6.35 (1/4")

× 2

9.52 (3/8")

× 2

mMax. allowable tubing length per unit

Flare Type

20

R410A / 1.7

Electric Expansion Valve

DC Twin Rotary (Inverter)

dB-A

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

C.O.P.

kW

Performance

%Power Factor 98

W/W -

Power Source

BTU/h

Capacity

m

3

/h

E.E.R. W/W 4.32

230VVoltage Rating

Type

Number of Connectable Indoor Units

6.15Max. Capacity of Operating Indoor Units kW

Number of Operatable Indoor Units

4.5

15,400

( 2.2 to 5.5 ) ( 7,500 to 18,800 )

Heating

1,900

Compressor Locked Rotor Amperes A 14.5

4.1

925

Heating

98

4.86

-

Operation Sound Hi 47 48

Remarks:

1. The Values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual.

Indoor Unit : MCAF98MR5I 2units Outdoor Unit : GRF148MR5I 1unit

2. Rating conditions are: Cooling : Indoor air temp. 27°C D.B. / 19°C W.B. Heating : Indoor air temp. 20°C D.B.

Outdoor air temp. 35°C D.B. / 24°C W.B. Outdoor air temp. 7°C D.B. / 6°C W.B.

2-Room Multi Outdoor Unit

2

7

Outdoor Unit GRF198MR5I Indoor Unit MCAF98MR5I

× 1 + MCAF188R5I × 1

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor Refrigerant / Amount charged at shipment kg Refrigerant Control

7.52

1,695

5.6

19,100

( 2.1 to 6.8 ) ( 7,200 to 23,200 )

Shipping Volume

Cooling

2,900

Cooling

Net Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

kg kg

m

3

mm

220 to 240V Single-Phase 50Hz

198 to 264

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Air Circulation (High)

WPower Input

V A

Available Voltage Range Running Amperes

Narrow tube Wide tube

Refrigerant mm (in.)

Tube Diameter mm (in.)

65.0

69.0

0.38

740

× 900 × 320

868

× 1,050 × 423

6.35 (1/4")

× 2

9.52 (3/8")

× 2

mMax. allowable tubing length per unit

Flare Type

25

R410A / 2.8

Electric Expansion Valve

DC Twin Rotary (Inverter)

dB-A

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

C.O.P.

kW

Performance

%Power Factor 98

W/W -

Power Source

BTU/h

Capacity

m

3

/h

E.E.R. W/W 3.30

230VVoltage Rating

2-Room Multi Outdoor UnitType

2Number of Connectable Indoor Units

8.65Max. Capacity of Operating Indoor Units kW

2Number of Operatable Indoor Units

7.3

24,900

( 2.4 to 8.4 ) ( 8,200 to 28,700 )

Heating

2,900

Compressor Locked Rotor Amperes A 14.5

7.70

1,735

Heating

98

4.21

-

Operation Sound Hi 50 52

Remarks:

1. The Values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual.

Indoor Unit : MCAF98MR5I 1unit + MCAF188R5I 1unit Outdoor Unit : GRF198MR5I 1unit

2. Rating conditions are: Cooling : Indoor air temp. 27°C D.B. / 19°C W.B. Heating : Indoor air temp. 20°C D.B.

Outdoor air temp. 35°C D.B. / 24°C W.B. Outdoor air temp. 7°C D.B. / 6°C W.B.

8

Outdoor Unit GRF248MR5I Indoor Unit MCAF98MR5I

× 3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor Refrigerant / Amount charged at shipment kg Refrigerant Control

8.87

2,000

6.8

23,200

( 2.9 to 8.1 ) ( 9,900 to 27,600 )

Shipping Volume

Cooling

2,900

Cooling

Net Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

kg kg

m

3

mm

220 to 240V Single-Phase 50Hz

198 to 264

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Air Circulation (High)

WPower Input

V A

Available Voltage Range Running Amperes

Narrow tube Wide tube

Refrigerant mm (in.)

Tube Diameter mm (in.)

65.0

69.0

0.38

740

× 900 × 320

868

× 1,050 × 423

6.35 (1/4")

× 4

9.52 (3/8")

× 3 + 12.7 (1/2") × 1

mMax. allowable tubing length per unit

Flare Type

25

R410A / 2.8

Electric Expansion Valve

DC Twin Rotary (Inverter)

dB-A

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

C.O.P.

kW

Performance

%Power Factor 98

W/W -

Power Source

BTU/h

Capacity

m

3

/h

E.E.R. W/W 3.40

230VVoltage Rating

4-Room Multi Outdoor UnitType

4Number of Connectable Indoor Units

12.2Max. Capacity of Operating Indoor Units kW

3Number of Operatable Indoor Units

8.6

29,300

( 3.4 to 9.0 ) ( 11,600 to 30,700 )

Heating

2,900

Compressor Locked Rotor Amperes A 14.5

8.87

2,000

Heating

98

4.30

-

Operation Sound Hi 50 52

Remarks:

1. The Values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual.

Indoor Unit : MCAF98MR5I 3units Outdoor Unit : GRF248MR5I 1unit

2. Rating conditions are: Cooling : Indoor air temp. 27°C D.B. / 19°C W.B. Heating : Indoor air temp. 20°C D.B.

Outdoor air temp. 35°C D.B. / 24°C W.B. Outdoor air temp. 7°C D.B. / 6°C W.B.

9

Outdoor Unit GRF318MR5I Indoor Unit MCAF98MR5I

× 4

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor Refrigerant / Amount charged at shipment kg Refrigerant Control

7.58

1,725

8.0

27,300

( 2.9 to 9.2 ) ( 9,900 to 31,400 )

Shipping Volume

Cooling

3,070

Cooling

Net Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

kg kg

m

3

mm

220 to 240V Single-Phase 50Hz

198 to 264

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Air Circulation (High)

WPower Input

V A

Available Voltage Range Running Amperes

Narrow tube Wide tube

Refrigerant mm (in.)

Tube Diameter mm (in.)

82.0

86.0

0.45

890

× 900 × 320

1,019

× 1,050 × 423

6.35 (1/4")

× 4

9.52 (3/8")

× 2 + 12.7 (1/2") × 2

mMax. allowable tubing length per unit

Flare Type

30

R410A / 3.8

Electric Expansion Valve

DC Twin Rotary (Inverter)

dB-A

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

C.O.P.

kW

Performance

%Power Factor 99

W/W -

Power Source

BTU/h

Capacity

m

3

/h

E.E.R. W/W 4.64

230VVoltage Rating

4-Room Multi Outdoor UnitType

4Number of Connectable Indoor Units

14.7Max. Capacity of Operating Indoor Units kW

4Number of Operatable Indoor Units

9.4

32,100

( 3.4 to 9.8 ) ( 11,600 to 33,400 )

Heating

3,070

Compressor Locked Rotor Amperes A 17.0

8.96

2,040

Heating

99

4.61

-

Operation Sound Hi 50 52

Remarks:

1. The Values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual.

Indoor Unit : MCAF98MR5I 4units Outdoor Unit : GRF318MR5I 1unit

2. Rating conditions are: Cooling : Indoor air temp. 27°C D.B. / 19°C W.B. Heating : Indoor air temp. 20°C D.B.

Outdoor air temp. 35°C D.B. / 24°C W.B. Outdoor air temp. 7°C D.B. / 6°C W.B.

10

Outdoor Unit GRF148MR5I

2-2-1. Outdoor Unit

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 25A

CB-CMRV1424EH

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

cc

WHT - BLU :

RED - WHT :

BLU - RED :

77.5

Micro F

VAC

External Finish Acrylic baked-on enamel finish

FV50S ... 350

-

Internal Controller

Yes

Aluminum Plate Fin / Copper Tube

2

13

Face Area

m

2

mm

0.452

Coil

Rows Fin Pitch

Heat Exchanger Coil

DAJ12-55J71-CR ... 1

Compressor Oil ... Amount

8

50

750 / 750

Ohm

DC Motor

Type Compressor Model / Nominal Output

Compressor

Coil Resistance (Ambient Temp. 20 °C)

Ohm

DC Twin Rotary (Hermetic)

C-6RVN93H0M / 1,000W

R - S : S - T : T - R :

0.482

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Safety Device

Micro F

VAC

Run Capacitor

Crankcase Heater

Yes Yes Yes

Overload Relay

CS-7L115

Model

Operation Temp.

Open : 115 °C, Close : 95 °C

-

1 ... D420

Fan

Propeller

Q'ty ... Dia. mm

Type

Type Over-Current Protection

Fan Motor

Nominal Output Coil Resistance

Safety Device

Run Capacitor

Type Model ... Q'ty No. of Poles

W

2-2. Major Component Specifications

(Ambient Temp. 20 °C)

Rough Measure RPM (Cool:Hi / Heat:Hi)

11

Outdoor Unit GRF198MR5I

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 25A

CB-CMRV1924EH

cc

FV50S ... 900

Compressor Oil ... Amount

Type Compressor Model / Nominal Output

Compressor

Coil Resistance (Ambient Temp. 20 °C)

Ohm

DC Twin Rotary (Hermetic)

5KD240XAB21 / 1,700W

U - V : V - W : W - U :

0.720

0.708

0.726

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Safety Device

Micro F

VAC

Run Capacitor

Crankcase Heater

Yes Yes Yes

Overload Relay

CS-7LN115

Model

Operation Temp.

Open : 115 °C, Close : 100 °C

-

230V 25W

1 ... D460

Fan

Propeller

Q'ty ... Dia. mm

Type

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

-

Micro F

VAC

External Finish Acrylic baked-on enamel finish

-

Internal Controller

Yes Yes

Aluminum Plate Fin / Copper Tube

2

1.4

Face Area 0.595

Coil

Rows

Heat Exchanger Coil

SIC-71FW-D490-1 ... 1

8

90

750 / 750

Ohm

DC Motor

Type Over-Current Protection Over-Heat Protection

(Ambient Temp. 20 °C)

Fan Motor

Nominal Output Coil Resistance

Safety Device

Rough Measure RPM (Cool:Hi / Heat:Hi)

Run Capacitor

Type Model ... Q'ty No. of Poles

W

m

2

mm

Fin Pitch

12

Outdoor Unit GRF248MR5I

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 25A

CB-CMRV2444EH

cc

FV50S ... 900

Compressor Oil ... Amount

Type Compressor Model / Nominal Output

Compressor

Coil Resistance (Ambient Temp. 20 °C)

Ohm

DC Twin Rotary (Hermetic)

5KD240XAB21 / 1,700W

U - V : V - W : W - U :

0.720

0.708

0.726

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Safety Device

Micro F

VAC

Run Capacitor

Crankcase Heater

Yes Yes Yes

Overload Relay

CS-7LN115

Model

Operation Temp.

Open : 115 °C, Close : 100 °C

-

230V 25W

1 ... D460

Fan

Propeller

Q'ty ... Dia. mm

Type

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

-

Micro F

VAC

External Finish Acrylic baked-on enamel finish

-

Internal Controller

Yes Yes

Aluminum Plate Fin / Copper Tube

2

1.4

Face Area 0.595

Coil

Rows

Heat Exchanger Coil

SIC-71FW-D490-1 ... 1

8

90

750 / 750

Ohm

DC Motor

Type Over-Current Protection Over-Heat Protection

(Ambient Temp. 20 °C)

Fan Motor

Nominal Output Coil Resistance

Safety Device

Rough Measure RPM (Cool:Hi / Heat:Hi)

Run Capacitor

Type Model ... Q'ty No. of Poles

W

m

2

mm

Fin Pitch

13

Outdoor Unit GRF318MR5I

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 25A

CB-CMRV3144EH

cc

FV50S ... 1,200

Compressor Oil ... Amount

Type Compressor Model / Nominal Output

Compressor

Coil Resistance (Ambient Temp. 20 °C)

Ohm

DC Twin Rotary (Hermetic)

5JD420XAB22 / 3,000W

U - V : V - W : W - U :

0.435

0.441

0.452

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Safety Device

Micro F

VAC

Run Capacitor

Crankcase Heater

Yes Yes Yes

Overload Relay

CS-7LN115

Model

Operation Temp.

Open : 115 °C, Close : 100 °C

-

230V 25W

1 ... D460

Fan

Propeller

Q'ty ... Dia. mm

Type

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

-

Micro F

VAC

External Finish Acrylic baked-on enamel finish

-

Internal Controller

Yes Yes

Aluminum Plate Fin / Copper Tube

2

1.4

Face Area 0.723

Coil

Rows

Heat Exchanger Coil

SIC-71FW-D490-1 ... 1

8

90

750 / 750

Ohm

DC Motor

Type Over-Current Protection Over-Heat Protection

(Ambient Temp. 20 °C)

Fan Motor

Nominal Output Coil Resistance

Safety Device

Rough Measure RPM (Cool:Hi / Heat:Hi)

Run Capacitor

Type Model ... Q'ty No. of Poles

W

m

2

mm

Fin Pitch

14

2-3. Other Component Specifications

0

0102030405060708090

40

60

80

100

120

140

160

180

200

20

Resistance (k ohm)

Temperature (°C)

40

35

30

25

20

15

10

5

0

-20-15-

10-50 5101520

Temperature (°C)

Resistance (k ohm)

Outdoor air temp sensor

Outdoor heat exchanger sensor

AW / AN sensor

BW / BN sensor

CW / CN sensor

DW / DN sensor

TKS295B

TKS292B

Model No.

of sensor

Sensor Name

1

1/1

0

1

1/1

0

Quantity of Sensor

1

1/1

1

1/1

GRF148MR5I GRF198MR5I GRF248MR5I GRF318MR5I

Sensor Name

Compressor temp sensor TKS293B

Model No.

of sensor

11

Quantity of Sensor

11

GRF148MR5I GRF198MR5I GRF248MR5I GRF318MR5I

15

295

608 85

790 70

46

336

310

285

4-ID:23.6

ID:18

2-ID:12

569

15

70122

158 70

14246

Wide tube service valve

dia.9.52 (3/8"

)

× 2

Narrow tube service valve

dia.6.35 (1/4")

× 2

Unit: mm

3. DIMENSIONAL DATA

Outdoor Unit GRF148MR5I

16

293

608 136

12

900 85

35

369

345

320

ID:18

5-ID:23.6

740

18

75113

150 72

11451

Wide tube service valve

dia.9.52 (3/8"

)

× 2

Narrow tube service valve

dia.6.35 (1/4")

× 2

Outdoor Unit GRF198MR5I

Unit: mm

17

293

608 136

12

35

369

345

320

ID:18

5-ID:23.6

900 85

740

18

75 70113

150 72

70

11451

70

Wide tube service valve

dia.9.52 (3/8"

)

× 3

Narrow tube service valve

dia.6.35 (1/4")

× 4

Wide tube service valve

dia.12.70 (1/2")

× 1

Outdoor Unit GRF248MR5I

Unit: mm

18

293

608 136

12

35

369

345

320

ID:18

5-ID:23.6

900 85

890

18

75 70113

150 73

70

11451

70

Wide tube service valve

dia.9.52 (3/8"

)

× 2

Narrow tube service valve

dia.6.35 (1/4")

× 4

Wide tube service valve

dia.12.70 (1/2")

× 2

Outdoor Unit GRF318MR5I

Unit: mm

19

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Outdoor Unit GRF148MR5I

Insulation of Refrigerant Tubing

Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min. 8 mm.

After a tube has been insulated, never try to bend it into a narrow curve because it can cause the tube to break or crack.

Wide tube

Thickness: Min. 8 mm

Insulation

Narrow tube

Thickness: Min. 8 mm

IMPORTANT

CAUTION

Compressor

4-way valve

Main accumulator

Sub accumulator

Service valve on narrow tube

Service valve on wide tube

Wide tube

BN

AN

BW

AW

O.D.9.52mm

Narrow tube O.D.6.35mm

O.D.6.35mm

Heat exchanger

Capillary tube for split flow

Cooling cycle

Heating cycle

Defrosting cycle

Indoor unit Outdoor unit

Defrost valve for hot gas bypass

Strainer

S

M

Electric expansion valve

Muffler

20

Narrow tube O.D.6.35mm

O.D.6.35mm

Outdoor Unit GRF198MR5I

Insulation of Refrigerant Tubing

Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min. 8 mm.

After a tube has been insulated, never try to bend it into a narrow curve because it can cause the tube to break or crack.

Wide tube

Thickness: Min. 8 mm

Insulation

Narrow tube

Thickness: Min. 8 mm

IMPORTANT

CAUTION

Compressor

4-way valve

Main accumulator

Sub accumulator

Service valve on narrow tube

Service valve on wide tube

Wide tube

BN

AN

BW

AW

O.D.9.52mm

Heat exchanger

Cooling cycle

Heating cycle

Defrosting cycle

Indoor unit Outdoor unit

Defrost valve for hot gas bypass

Strainer

S

M

Electric expansion valve

Header

21

Outdoor Unit GRF248MR5I

Insulation of Refrigerant Tubing

Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min. 8 mm.

After a tube has been insulated, never try to bend it into a narrow curve because it can cause the tube to break or crack.

Wide tube

Thickness: Min. 8 mm

Insulation

Narrow tube

Thickness: Min. 8 mm

IMPORTANT

CAUTION

Compressor

4-way valve

Main accumulator

Sub accumulator

Service valve on narrow tube

Service valve on wide tube

Wide tube

DN

CN

BN

AN

DW

CW

BW

AW

O.D.9.52mm

O.D.12.7mm

Narrow tube O.D.6.35mm

O.D.6.35mm

Heat exchanger

Cooling cycle

Heating cycle

Defrosting cycle

Indoor unit Outdoor unit

Defrost valve for hot gas bypass

Strainer

S

M

Electric expansion valve

Header

M

22

Outdoor Unit GRF318MR5I

Insulation of Refrigerant Tubing

Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min. 8 mm.

After a tube has been insulated, never try to bend it into a narrow curve because it can cause the tube to break or crack.

Wide tube

Thickness: Min. 8 mm

Insulation

Narrow tube

Thickness: Min. 8 mm

IMPORTANT

CAUTION

Compressor

4-way valve

Main accumulator

Sub accumulator

Service valve on narrow tube

Service valve on wide tube

Wide tube

DN

CN

BN

AN

DW

CW

BW

AW

O.D.9.52mm

O.D.12.7mm

Narrow tube O.D.6.35mm

O.D.6.35mm

Heat exchanger

Cooling cycle

Heating cycle

Defrosting cycle

Indoor unit Outdoor unit

Defrost valve for hot gas bypass

Strainer

S

M

Electric expansion valve

Header

M

23

5. PERFORMANCE DATA

5-1. Temperature Charts

5-1-1. Temperature Charts (GRF148MR5I)

Outdoor Unit GRF148MR5I Indoor Unit MCAF78MR5I × 1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

Outdoor air temperature (°C)

30 35 40

1.4

(14.2)

1.6

(16.2)

1.2

(12.2)

1.0

(10.2)

25

-5 0 5 10 15 20 25

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

1.5

(15.3)

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

3

4

2

1

25

-5 0 5 10 15 20 25

4

3

2

1

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

5

-5 0 5 10 15 20 25

55

50

45

40

35

30

25

20

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

30 35 40

20

25

15

10

25

2727°C

2424°C

Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

17°C

Indoor air tem

p.23

Indoor air temp.23°CIndoor air tem

p.23

°C

20°C

17°C

27°C 24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24

°C

27°C

2424°C

Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

Lo fan Hi fan

24

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

3

4

2

1

25

Lo fan Hi fan

-5 0 5 10 15 20 25

6

7

5

4

3

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

5

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

25

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

30 35 40

20

25

15

10

25

Lo fan Hi fan

27°C

24°C

Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24

°C

20°C

17°C

Indoor air tem

p.23

Indoor air temp.23°CIndoor air tem

p.23

°C

20

°C

17°C

27°C 24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24

°C

27°C

2424°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

2020°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

Outdoor Unit GRF148MR5I Indoor Unit MCAF98MR5I × 1

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.4

(14.2)

1.6

(16.2)

1.2

(12.2)

1.0

(10.2)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

25

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

5

6

4

3

25

Lo fan Hi fan

-5 0 5 10 15 20 25

7

8

6

5

4

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

5

-5 0 5 10 15 20 25

65

60

55

50

45

40

35

30

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

30 35 40

20

25

15

10

25

27°C

24°C

Indoor air temp.30°CIndoor air temp.30

°C

27°C

24

°C

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24

°C

2727°C

2424°C

Indoor air tem

p.30

Indoor air temp.30°CIndoor air tem

p.30

°C

27°C

24°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

Outdoor Unit GRF148MR5I Indoor Unit MCAF128MR5I × 1

Lo fan Hi fan

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.2

(12.2)

1.4

(14.2)

1.0

(10.2)

0.8

(8.2)

4.0

(40.8)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

26

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor Unit GRF198MR5I Indoor Unit MCAF78MR5I × 1

5-1-2. Temperature Charts (GRF198MR5I)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan HH fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

4

5

3

2

25

Lo fan Hi fan HH fan

-5 0 5 10 15 20 25

7

8

6

5

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

8

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

25

20°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

30 35 40

20

18

16

14

12

10

25

Lo fan Hi fan HH fan

27°C

2424°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24°C

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24

°C

27°C

24°C

Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24°C

20°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.2

(12.2)

1.3

(13.2)

1.1

(11.2)

1.0

(10.2)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

27

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor Unit GRF198MR5I Indoor Unit MCAF98MR5I × 1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

5

6

4

3

25

Lo fan Hi fan

-5 0 5 10 15 20 25

7

8

6

5

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

10

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

25

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23°C

20°C

17

°C

30 35 40

20

18

16

14

12

25

Lo fan Hi fan

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24

°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

27°C

24°C

Indoor air tem

p.30

Indoor air temp.30°CIndoor air tem

p.30

°C

27°C

24°C

27°C

24°C

Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

2020°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

HH fan

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.2

(12.2)

1.3

(13.2)

1.1

(11.2)

1.0

(10.2)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

28

Outdoor Unit GRF198MR5I Indoor Unit MCAF128MR5I × 1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

5

6

4

3

25

Lo fan Hi fan

-5 0 5 10 15 20 25

7

9

3

5

8

10

4

6

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

8

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

25

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

30 35 40

18

20

16

14

12

10

25

Lo fan Hi fan

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17

°C

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24

°C

27°C

24°C

Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24°C

2020°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

HH fan

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.1

(11.2)

1.2

(12.2)

1.0

(10.2)

0.9

(9.2)

4.0

(40.8)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

29

Outdoor Unit GRF198MR5I Indoor Unit MCAF188R5I × 1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

7

8

6

5

25

Lo fan Hi fan

-5 0 5 10 15 20 25

10

12

6

8

9

11

7

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

8

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

20°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

30 35 40

18

20

16

14

12

10

25

Lo fan Hi fan

2727°C

2424°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17

°C

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24

°C

2727°C

2424°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30°C

27°C

24

°C

20°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

HH fan

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.1

(11.2)

1.2

(12.2)

1.0

(10.2)

0.9

(9.2)

4.0

(40.8)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

30

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan HH fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

4

5

3

2

25

Lo fan Hi fan HH fan

-5 0 5 10 15 20 25

7

8

6

5

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

8

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

25

20°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

30 35 40

20

18

16

14

12

10

25

Lo fan Hi fan HH fan

27°C

2424°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24°C

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24

°C

27°C

24°C

Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24°C

20°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

Outdoor Unit GRF248MR5I Indoor Unit MCAF78MR5I × 1

5-1-3. Temperature Charts (GRF248MR5I)

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.2

(12.2)

1.3

(13.2)

1.1

(11.2)

1.0

(10.2)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

31

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

5

6

4

3

25

Lo fan Hi fan

-5 0 5 10 15 20 25

7

8

6

5

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

10

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

25

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23°C

20°C

17

°C

30 35 40

20

18

16

14

12

25

Lo fan Hi fan

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24

°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

27°C

24°C

Indoor air tem

p.30

Indoor air temp.30°CIndoor air tem

p.30

°C

27°C

24°C

27°C

24°C

Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

2020°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

Outdoor Unit GRF248MR5I Indoor Unit MCAF98MR5I × 1

HH fan

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.2

(12.2)

1.3

(13.2)

1.1

(11.2)

1.0

(10.2)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

32

Outdoor Unit GRF248MR5I Indoor Unit MCAF128MR5I × 1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

5

6

4

3

25

Lo fan Hi fan

-5 0 5 10 15 20 25

7

9

3

5

8

10

4

6

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

8

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

25

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

30 35 40

18

20

16

14

12

10

25

Lo fan Hi fan

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17

°C

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24

°C

27°C

24°C

Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24°C

2020°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

HH fan

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.1

(11.2)

1.2

(12.2)

1.0

(10.2)

0.9

(9.2)

4.0

(40.8)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

33

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

7

8

6

5

25

Lo fan Hi fan

-5 0 5 10 15 20 25

10

12

6

8

9

11

7

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

8

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

30 35 40

18

20

16

14

12

10

25

Lo fan Hi fan

2727°C

2424°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17

°C

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24

°C

2727°C

2424°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30°C

27°C

24

°C

20°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

Outdoor Unit GRF248MR5I Indoor Unit MCAF188R5I × 1

HH fan

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.1

(11.2)

1.2

(12.2)

1.0

(10.2)

0.9

(9.2)

4.0

(40.8)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

34

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

8

9

7

6

25

Lo fan Hi fan

-5 0 5 10 15 20 25

12

14

8

10

11

13

9

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

8

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

2020°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

30 35 40

18

20

16

14

12

10

25

Lo fan Hi fan

2727°C

24°C

Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20

°C

1

7°C

27°C

24°C

Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24

°C

27°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27

°C

24°C

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17

°C

Outdoor Unit GRF248MR5I Indoor Unit MCAF248R5I × 1

HH fan

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.1

(11.2)

1.2

(12.2)

1.0

(10.2)

0.9

(9.2)

4.0

(40.8)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

35

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan Hi fan HH fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

4

5

3

25

-5 0 5 10 15 20 25

8

9

7

6

5

4

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

5

-5 0 5 10 15 20 25

55

50

45

40

35

30

25

20

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17

°C

30 35 40

25

20

15

10

25

2727°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

17°C

20°C

17°C

24°C24

°C

27°C

2424°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

Outdoor Unit GRF318MR5I Indoor Unit MCAF78MR5I × 1

5-1-4. Temperature Charts (GRF318MR5I)

Lo fan Hi fan Hi fan HH fan

27°C27°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

Indoor air tem

p.23

Indoor air temp.23°CIndoor air tem

p.23

°C

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.0

(10.2)

1.2

(12.2)

0.8

(8.2)

0.6

(6.2)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

1.5

(15.3)

36

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan Hi fan HH fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

4

5

3

25

-5 0 5 10 15 20 25

7

8

6

5

4

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

5

-5 0 5 10 15 20 25

55

50

45

40

35

30

25

20

20°C

17°C

Indoor air tem

p.23

Indoor air temp.23°CIndoor air tem

p.23

°C

20°C

17

°C

30 35 40

25

20

15

10

25

2727°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17

°C

24°C24°C

27°C

2424°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

1717°C

Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

Outdoor Unit GRF318MR5I Indoor Unit MCAF98MR5I × 1

Lo fan Hi fan Hi fan HH fan

Indoor air tem

p.30

Indoor air temp.30°CIndoor air tem

p.30

°C

27°C27°C

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.0

(10.2)

1.2

(12.2)

0.8

(8.2)

0.6

(6.2)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

1.5

(15.3)

37

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 4025

Lo fan Hi fan Hi fan HH fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

4

5

6

3

25

-5 0 5 10 15 20 25

12

13

10

11

9

8

7

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

5

-5 0 5 10 15 20 25

55

50

45

40

35

30

25

20

20°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

30 35 40

25

20

15

10

25

2727°C

24°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24°C

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23°C

20°C

17°C

24°C24

°C

2727°C

2424°C

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C

24

°C

20°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

Outdoor Unit GRF318MR5I Indoor Unit MCAF128MR5I × 1

Lo fan Hi fan Hi fan HH fan

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

27°C27°C

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.0

(10.2)

1.2

(12.2)

0.8

(8.2)

0.6

(6.2)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

1.5

(15.3)

38

30 35 4025

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on

the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

6

5

7

8

9

4

25

-5 0 5 10 15 20 25

14

12

13

11

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

5

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

25

2020°C

1717°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23

°C

20°C

17°C

30 35 40

25

20

15

10

25

2727°C

24°C

Indoor air tem

p.30

Indoor air temp.30°CIndoor air tem

p.30

°C

27°C

24°C

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23°C

20

°C

17

°C

24°C24°C

2727°C

2424°C

Indoor air tem

p.30

Indoor air temp.30°CIndoor air tem

p.30

°C

27°C

24

°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

Outdoor Unit GRF318MR5I Indoor Unit MCAF188R5I × 1

Lo fan Hi fan

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

Lo fan Hi fan

27°C27°C

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.0

(10.2)

1.2

(12.2)

0.8

(8.2)

0.6

(6.2)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

1.5

(15.3)

39

30 35 4025

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 50Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 50Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.)

• The performance is for a tubing length of 7.5 m. If the tubing length is different, the performance chart will vary.

NOTE

Outdoor air temperature (°C) Outdoor air temperature (°C)

Lo fan Hi fan

-5 0 5 10 15 20 25

Operating current (A)

Outdoor air temperature (°C) Outdoor air temperature (°C)

30 35 40

9

8

10

11

12

25

-5 0 5 10 15 20 25

14

12

13

11

Indoor discharge air temperature (°C)

Outdoor air temperature (°C) Outdoor air temperature (°C)

5

-5 0 5 10 15 20 25

60

55

50

45

40

35

30

25

20°C

1717°C

Indoor air tem

p.23

Indoor air temp.23°CIndoor air tem

p.23

°C

20

°C

17°C

30 35 40

25

20

15

10

25

2727°C

24°C

Indoor air temp.30°CIndoor air temp.30°C

27°C

24°C

20°C

17°C

Indoor air temp.23Indoor air temp.23°CIndoor air temp.23°C

20

°C

17

°C

2727°C

2424°C

Indoor air tem

p.30

Indoor air temp.30°CIndoor air tem

p.30

°C

27°C

24

°C

20°C

17°C

Indoor air temp.23°CIndoor air temp.23

°C

20

°C

17°C

Outdoor Unit GRF318MR5I Indoor Unit MCAF248R5I × 1

Lo fan Hi fan

Indoor air temp.30Indoor air temp.30°CIndoor air temp.30

°C

Lo fan Hi fan

24°C24°C

27°C27°C

Low pressure at wide tube service valve

MPaG (kgf/cm

2

G)

High pressure at wide tube service valve

MPaG (kgf/cm

2

G)

1.0

(10.2)

1.2

(12.2)

0.8

(8.2)

0.6

(6.2)

3.5

(35.7)

3.0

(30.6)

2.5

(25.5)

2.0

(20.4)

1.5

(15.3)

40

WARNING

To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts.

6. ELECTRICAL DATA

6-1. Electric Wiring Diagrams

Outdoor Unit GRF148MR5I

8FA2-5257-56900-2

YEL BLU RED BLK

WHT

REACTANCE

CONTROLLER

BLK

WHT

COIL/OUTDOOR

COIL

THERMISTOR

COMPRESSOR

THERMISTOR

WHT

RED

(2P) CONNECTOR

(4P) CONNECTOR

WHT

OUTDOOR

THERMISTOR

COMP

MAGNETIC COIL

(5P) CONNECTOR

RED

MV0

TERMINAL

PLATE

1234567

8

GND

A INDDOR

UNIT

B INDDOR

UNIT

TO INDDOR UNIT

POWER

SUPPLY

NL

WHT

1 2 3 4

1

2

11

22

YEL

BLK

YEL

BLK

1

2

3

4

A-TH

AW THERMISTOR

AN THERMISTOR

(4P) CONNECTOR

RED

1 2 3 4

YEL

1

2

3

4

B-TH

BW THERMISTOR

BN THERMISTOR

(4P) CONNECTOR

BLU

1 2 3 4

W W

YEL

1

2

3

4

5

GRY GRY

555

4

BLK BLK

444

3

YEL YEL

333

2

RED RED

222

1

ORG ORG

111

DEF1 DEF0

(2P) CONNECTOR

BLK

BLU

DEF

COIL

DEFROST VALVE

2

1

W W

RV1 RV0

(2P) CONNECTOR

WHT

BLK

BLU

RV

COIL

4WAY VALVE

2

1

W W

L2 L1 E-2

MV0

MAGNETIC COIL

(5P) CONNECTOR

BLU

MV1

FAN MOTOR

5

1 2 3 4 5 6 7

5

GRY GRY

555

4

BLK BLK

444

3

YEL YEL

333

2

RED RED

222

1

ORG ORG

111

MV1

(7P) CONNECTOR

WHT

7

YEL

7

6

BLU

6

5

RED

5

4

BLK

4

3

2

1

WHT

1

CN04 DCFM

(2P) CONNECTOR

WHT

2

1

GRN/YEL

W

E-1

GRN/YEL

W

E

GRN/YEL

W

REACTANCE

BLK

WHT

BLK

RED

BLU

WHT

ACIN1WACIN2

W

SI-AWSI-B

25A

FM

(3P)CONNECTOR

FERRITE

CORE

COMPRESSOR

MOTOR

WHT

C

S

R

CM

BLU

WHT

RED (PNK)

BLU

WHT

RED (PNK)

11223

3

GRN/YEL

W

V

W

U

OLR1

OLR0

W

(OLR)

OVERLOAD RELAY

112

2

WHT

41

WARNING

To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts.

Outdoor Unit GRF198MR5I

8FA2-5257-84200-0

HEATER

CRANKCASE

WHT

(2P) CONNECTOR

MAGNETIC COIL

MV0

5

GRY

5

4

BLK

4

3

YEL

3

2

RED

2

1

ORG

1

TERMINAL

PLATE

1234567

8

GND

A INDDOR

UNIT

B INDDOR

UNIT

TO INDDOR UNIT

POWER

SUPPLY

NL

WHT

REACTANCE

BLK

WHT

BLK

RED

BLU

WHT

ORG

WHT BRN BLU

RED

ORG

WHT BRN BLU

RED

FAN MOTOR

1 2 3 4 5 6 7

7654321

FM

FERRITE

CORE

(3P) CONNECTOR

COMPRESSOR

MOTOR

C/WS/U

R/V

WHT

CM

FERRITE

CORE

BLU WHT RED (PNK)

BLU

WHT

WHT RED (PNK)

REACTANCE

CONTROLLER

BLK

WHT

COIL/OUTDOOR

COIL

THERMISTOR

COMPRESSOR

THERMISTOR

RED

(2P) CONNECTOR

OUTDOOR

THERMISTOR

COMP

1 2 3 4

1

2

1

2

YEL

BLK

1 2 3 4

A-TH

AW THERMISTOR

AN THERMISTOR

1 2 3 4

YEL

1 2 3 4

B-TH

BW THERMISTOR

BN THERMISTOR

1 2 3 4

W W

YEL

1 2 3 4

54321

DEF1 DEF0

(2P) CONNECTOR

BLK

BLU

DEF

COIL

DEFROST VALVE

2

1

W W

RV1 RV0

(2P) CONNECTOR

WHT

BLK

BLU

RV

COIL

4WAY VALVE

2

1

W W

L2 L1 E-2

MV0

MAGNETIC COIL

MV1

5

GRY

5

4

BLK

4

3

YEL

3

2

RED

2

1

ORG

1

54321

MV1

7654321

CN04 DCFM

(2P) CONNECTOR

WHT

2

1

GRN/YEL

W

E-1

GRN/YEL

W

E

GRN/YEL

W

ACIN1WACIN2

W

SI-AWSI-B

25A

OLR1

OLR0

W

(OLR)

OVERLOAD RELAY

112

2

WHT

GRN/YEL

1 2 3

321

W

HEATER1

W

HEATER0

W

V

W

U

W

221

1

42

WARNING

To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts.

Outdoor Unit GRF248MR5I

8FA2-5257-57100-0

RED

(2P) CONNECTOR

OVERLOAD RELAY

(OLR)

221

1

REACTANCE

CONTROLLER

BLK

COIL/OUTDOOR

COIL

THERMISTOR

COMPRESSOR

THERMISTOR

OUTDOOR

THERMISTOR

COMP

1 2 3 4

1

2

1

2

YEL

BLK

1 2 3 4

A-TH

AW THERMISTOR

AN THERMISTOR

1 2 3 4

YEL

1 2 3 4

B-TH

BW THERMISTOR

BN THERMISTOR

1 2 3 4

W W

YEL

1 2 3 4

DEF1 DEF0

(2P) CONNECTOR

BLK

BLU

DEF

COIL

DEFROST VALVE

2

1

W W

RV1 RV0

(2P) CONNECTOR

WHT

BLK

BLU

RV

COIL

4WAY VALVE

2

1

W W

L2 L1 E-2

(2P) CONNECTOR

WHT

2

1

GRN/YEL

W

E-1

GRN/YEL

W

E

GRN/YEL

W

WWVWUWOLR1

W

OLR0

25A

1234567

8

GND

9

A INDDOR

UNIT

B INDDOR

UNIT

C INDDOR

UNIT

D INDDOR

UNIT

POWER

SUPPLY

NL

TO INDDOR UNIT

WHT

REACTANCE

101112

BLK

WHT

BLK

WHT

BLK

BRN

GRY

RED

BLU

FERRITE

CORE

W

ACIN1WACIN2

W

SI-AWSI-B

FERRITE

CORE

(3P) CONNECTOR

COMPRESSOR

MOTOR

C/WS/U

R/V

WHT

CM

BLU

WHT RED (PNK)

BLU

WHT

RED (PNK)

GRN/YEL

1 2 3

321

CRANKCASE

HEATER

(2P) CONNECTOR

WHT

112

2

W W

HEATER1 HEATER0

MAGNETIC COIL

MV0

5

GRY

5

4

BLK

4

3

YEL

3

2

RED

2

1

ORG

1

54321

MV0

MAGNETIC COIL

MV1

5

GRY

5

4

BLK

4

3

YEL

3

2

RED

2

1

ORG

1

54321

MV1

MAGNETIC COIL

MV2

5

GRY

5

4

BLK

4

3

YEL

3

2

RED

2

1

ORG

1

54321

MV2

MAGNETIC COIL

MV3

5

GRY

5

4

BLK

4

3

YEL

3

2

RED

2

1

ORG

1

54321

MV3C-TH

ORG

WHT BRN BLU

RED

ORG

WHT BRN BLU

BLK

WHT

RED

BLU

BLK

WHT

RED

BLU

RED

FAN MOTOR

1 2 3 4 5 6 7

7654321

FM

7654321

CN04 DCFM

1 2 3 4 5 6 7

7654321

7

8

8654321

KS23

CN03

BLK

WHT

RED

BLU

BLK

WHT

1 2 3 4 5 6

654321

KS22

CN02

BLK

WHT

RED

BLU

1 2 3 4

4321

KS10

CN01

SICOM2

W

SI-C

W

SI-D

CW THERMISTOR

CN THERMISTOR

1 2 3 4

YEL

1 2 3 4

D-TH

DW THERMISTOR

DN THERMISTOR

1 2 3 4

YEL

1 2 3 4

WHT

TERMINAL

PLATE

1

2

3

BLK

WHT

SICOM2

43

WARNING

To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts.

Outdoor Unit GRF318MR5I

8FA2-5257-89000-0

RED

(2P) CONNECTOR

OVERLOAD RELAY

(OLR)

221

1

REACTANCE

CONTROLLER

BLK

COIL/OUTDOOR

COIL

THERMISTOR

COMPRESSOR

THERMISTOR

OUTDOOR

THERMISTOR

COMP

1 2 3 4

1

2

1

2

YEL

BLK

1 2 3 4

A-TH

AW THERMISTOR

AN THERMISTOR

1 2 3 4

YEL

1 2 3 4

B-TH

BW THERMISTOR

BN THERMISTOR

1 2 3 4

W W

YEL

1 2 3 4

DEF1 DEF0

(2P) CONNECTOR

BLK

BLU

DEF

COIL

DEFROST VALVE

2

1

W W

RV1 RV0

(2P) CONNECTOR

WHT

BLK

BLU

RV

COIL

4WAY VALVE

2

1

W W

L2 L1 E-2

(2P) CONNECTOR

WHT

2

1

GRN/YEL

FERRITE

CORE

W

E-1

GRN/YEL

W

E

GRN/YEL

W

WWVWUWOLR1

W

OLR0

25A

1234567

8

GND

9

A INDDOR

UNIT

B INDDOR

UNIT

C INDDOR

UNIT

D INDDOR

UNIT

POWER

SUPPLY

NL

TO INDDOR UNIT

WHT

REACTANCE

101112

BLK

WHT

BLK

WHT

BLK

BRN

GRY

RED

BLU

FERRITE

CORE

W

ACIN1WACIN2

W

SI-AWSI-B

FERRITE

CORE

(3P) CONNECTOR

(7P) CONNECTOR

COMPRESSOR

MOTOR

C/WS/U

R/V

WHT

CM

BLU WHT RED (PNK)

BLU

WHT RED (PNK)

GRN/YEL

1 2 3

321

CRANKCASE

HEATER

(2P) CONNECTOR

WHT

112

2

W W

HEATER1 HEATER0

MAGNETIC COIL

MV0

5

GRY

5

4

BLK

4

3

YEL

3

2

RED

2

1

ORG

1

54321

MV0

MAGNETIC COIL

MV1

5

GRY

5

4

BLK

4

3

YEL

3

2

RED

2

1

ORG

1

54321

MV1

MAGNETIC COIL

MV2

5

GRY

5

4

BLK

4

3

YEL

3

2

RED

2

1

ORG

1

54321

MV2

MAGNETIC COIL

MV3

5

GRY

5

4

BLK

4

3

YEL

3

2

RED

2

1

ORG

1

54321

MV3C-TH

ORG

WHT BRN BLU

RED

ORG WHT BRN

BLU

BLK

WHT

RED

BLU

BLK

WHT

RED

BLU

RED

FAN MOTOR

1 2 3 4 5 6 7

7654321

FM

7654321

CN04 DCFM

1 2 3 4 5 6 7

7654321

7

8

8654321

KS23

CN03

BLK

WHT

RED

BLU

BLK

WHT

1 2 3 4 5 6

654321

KS22

CN02

BLK

WHT

RED

BLU

1 2 3 4

4321

KS10

CN01

SICOM2

W

SI-C

W

SI-D

CW THERMISTOR

CN THERMISTOR

1 2 3 4

YEL

1 2 3 4

D-TH

DW THERMISTOR

DN THERMISTOR

1 2 3 4

YEL

1 2 3 4

WHT

TERMINAL

PLATE

1

2

3

BLK

WHT

SICOM2

44

7. FUNCTIONS

7-1. Explanation of Functions

The numerical values such as temperature, frequency, time and current in parentheses are an example

of GRF318MR5I and the values are different from the other models.

Control/conditions

INITIAL

Breaker is ON. Power is supplied to the indoor and outdoor unit

control circuits, however the unit remains stopped. Positioning of the outdoor unit electric expansion valve is performed.

The ON/OFF operation button on the remote controller is pressed.

If automatic operation mode has been selected with the remote controller, operation begins in HEAT, SENSOR DRY, or COOL mode depending on the room temperature and outdoor temperature at the time operation starts.

Depending on the operational mode, refer to the HEAT, SENSOR DRY, or COOL item.

This applies in the case of automatic HEAT/COOL operation.

HEAT

Unit operation Explanation

The ON/OFF operation button on the remote controller is pressed.

The unit is forced to stop for 3 minutes after the power is turned ON, or 3 minutes after the compressor stops, in order to protect the compressor.

The frequency is increased at the rate of 1 Hz every 0.5 seconds.

Operation lamp illuminates.

Indoor fan is stopped to prevent cold air from being emitted.

Outdoor unit begins operating after forced-stop is canceled.

This is in order to stabilize the return of oil to the compressor.

When the frequency reaches Hz,frequency increases are stopped for a period of seconds.

(Refor to Table 2 "Freguency control".)

If the indoor and outdoor temperatures are high, the current peak cut-off activates, stopping any increases in frequency.

The frequency then increases.

The thermostat turns OFF.

The outdoor unit stops. (It does not stop if the thermostat for another indoor unit is ON.)

Approximately 30 seconds after the thermostat turns OFF, the indoor fan is stopped.

The indoor fan is stopped.

The indoor and outdoor temperatures are high.

The outdoor unit starts automatically after 3 minutes.

During these 3 minutes, a low-pressure pressure balance is achieved, allowing the compressor to start more easily.

In order to protect the compressor, the outdoor unit will not operate for 3 minutes after the thermostat turns OFF, even if the room temperature drops below the desired temperature.

The room temperature has reached the desired temperature.

Operating frequency is stabilized in order to maintain a comfortable environment.

The indoor temperature and the remote controller temperature setting are approximately equal.

The thermostat turns ON. The unit operated before, and the temperature of

the indoor heat exchanger is relatively warm. Therefore,the fan speed may start at the set fan speed at the same time that the thermostat turns ON.

The indoor unit is stopped.

Depending on the relationship between the remote controller temperature setting and the room temperature, the compressor may stop temporarily (in other words, the thermostat may turn OFF).

When the indoor coil temperature rises,

the compressor starts,

the outdoor fan starts,

and the indoor fan changes from "LL" to the set fan speed.

The amount of heat pump exceeds the amount of heat radiation from the room. Therefore, there is no need to further increase the compressor capacity, and the frequency is stabilized or lowered.

The frequency is not increased, even if there is a difference between the room temperature and the desired temperature. In some cases, the frequency may be decreased.

NOTE

45

Control/conditions

HEAT

When defrost operation begins, frost has formed on the outdoor unit (when the ambient air temperature is low).

Defrost operation begins based on outdoor heat exchanger temperature and outdoor air temperature conditions. Non-stop defrost (Refer to Fig. 1)

1. After HEAT operation begins, the temperature of the outdoor heat exchanger is at or below the L1 line for 35 minutes. (If outdoor air temperature is less than –3 °C, the time is 48 minutes)

2. After HEAT operation begins, the temperature of the outdoor heat exchanger is at or below the L2 line for 120 minutes.

The 4-way valve remains ON during defrost.

Non-stop defrost

Unit operation Explanation

The outdoor fan stops and the solenoid valve turns ON, allowing the refrigerant to bypass the indoor unit.

Indoor fan : Stopped

Outdoor fan : Stopped

Compressor : 80 Hz

Solenoid valve (for hot gas bypass): ON

4-way valve : Remains ON

Operation lamp : Red and orange ON

alternately

Defrost release Indoor fan turns ON.

After 10 seconds, the solenoid valve (for hot gas bypass) turns OFF.

When the cold air feel has disappeared, the indoor fan starts and gradually increases speed until it reaches the set speed.

STOP

[Clean defrost]

Defrost is performed when the outdoor unit is stopped, and the temperature of the outdoor unit coil is at or below the L1 line.

(Refer to Fig. 1.)

All indicator lamps turn OFF. The indoor and outdoor units stop.

The operating frequency during defrost is 80 Hz. (Frequency is lowered if the current peak cut-off function is activated.)

The maximum length of a single defrost operation is 12 minutes.

For the outdoor heat exchanger temperature conditions for ending defrost, refer to Table 1.

Operation is restarted within 4 hours (only when AUTO mode is selected with the remote controller).

Within 4 hours after operation was stopped, it is assumed that there has been no significant change in the indoor and outdoor temperatures, and the previous conditions (HEAT) are stored.

Table 1

Starts operating in the same operating mode (HEAT) and with the same temperature settings as before operation was stopped.

Operation starts after 4 hours or more have passed.

Outdoor heat

exchanger temperature

Fig. 1

Outdoor air temperature

(–20) 0

(– 6) (– 7)

(– 24) (– 25)

L2 L1

New operation begins based on the temperature conditions at the time the ON/OFF button is pressed.

Temperature of releasing

*1 The temperature for releasing of defrosting is (20 °C) or higher when the

outdoor air temperature is less than 0 °C.

Defrost operation time

Heat exchanger temperature for releasing defrosting

Less than 2 minutes 2 minutes or more

No releasing 14 °C or higher (*1)

46

Control/conditions

COOL

The ON/OFF operation button on the remote controller is pressed.

The room temperature has reached the desired temperature.

The outdoor unit does not operate for 3 minutes even after the breaker is turned ON.

This is in order to stabilize the return of oil to the compressor.

Frequency control

(Hz)

(25) Hz

(35) Hz

(45) Hz

(55) Hz

The outdoor unit starts.

(Compressor and the outdoor fan start.)

When the frequency reaches Hz, frequency increases are stopped for a period of seconds. (Refer to Table 2.)

If the indoor and outdoor temperatures are high, the current peak cut-off activates, stopping any increases in frequency.

The frequency then increases.

Operating frequency is stabilized in order to maintain a comfortable environment.

The indoor temperature and the desired temperature are approximately equal.

The thermostat turns ON again.

After 3 minutes, the outdoor unit begins operating automatically.

During these 3 minutes, a pressure balance is achieved, allowing the compressor to start more easily.

After the thermostat turns ON again, the outdoor unit will not operate for 3 minutes, even if the room temperature increases above the desired temperature.

Operation is restarted within 4 hours (only when AUTO mode is selected with the remote controller).

Within 4 hours after operation was stopped, it is assumed that there has been no significant change in the indoor and outdoor temperatures, and the previous conditions (COOL) are stored.

Starts operating in the same operating mode (COOL) and with the same temperature settings as before operation was stopped.

Operation starts after 4 hours or more have passed.

New operating mode is determined based on the temperature conditions at the time the ON/OFF operation button is pressed.

Stop All indicator lamps turn OFF. The indoor and

outdoor units stop.

Freeze prevention In order to protect against freezing, the

compressor stops temporarily, until the temperature of the indoor heat exchanger has risen.

The thermostat turns OFF.

The outdoor unit stops. (It does not stop if the thermostart for another indoor unit is ON.)

Unit operation Explanation

The operation lamp illuminates.

The indoor fan operates at the set fan speed.

The outdoor unit stops.

When the temperature of the indoor heat exchanger drops to approximately 2 °C or below, the compressor turns OFF, the outdoor fan turns OFF, and the indoor fan continues operating with no changes.

Approximately 3 minutes later, if the temperature of the indoor heat exchanger is adove 8 °C, the system returns to its original conditions.

The frequency is increased at the rate of 0.5 Hz every 1 seconds.

Outdoor air temperature is below 0 °C.

(120) seconds

(60) seconds

(180) seconds

Table 2

(senconds)

Outdoor air temperature is 0 °C or higher.

(60) seconds

(30) seconds

(90) seconds

47

Control/conditions

SENSOR DRY

(1/f fluctuation fan)

The ON/OFF operation button on the remote controller is pressed.

The outdoor unit does not operate for 3 minutes even after the breaker is turned ON.

This is in order to stabilize the return of oil to the compressor.

The outdoor unit starts.

(Compressor and the outdoor fan start.)

When the frequency reaches Hz, frequency increases are stopped for a period of seconds. (Refer to Table 2.)

DRY B operation

If the indoor and outdoor temperatures are high, the current peak cut-off activates, stopping any increases in frequency.

The frequency then increases.

Unit operation Explanation

The operation lamp illuminates.

The indoor fan operates at the set fan speed.

The outdoor unit stops.

The room temperature reaches the desired temperature, and there is no need for further cooling.

Operating frequency is stabilized in order to maintain a comfortable environment.

The room temperature is 15 °C or higher, and is slightly too cold.

The compressor operates on a 3-minutes ON, 6-minutes OFF cycle, to prevent the room temperature from dropping too much.

DRY operation starts

DRY A operation

The room temperature is below 15 °C.

1/f fluctuation fan

250

200

6-minute cycle

Fig. 2

150

100

(Step)

50

0

When monitoring operation begins, the compressor stops, and the indoor fan operates at "LL" (very low) speed.

Monitoring operation begins.

The indoor fan changes between "Low" and "LL" (very low) over a 6-minute cycle. This is 1/f fluctuation fan operation. (Refer to Fig. 2.)

The indoor fan changes between "Low" and "LL" (very low) over a 6-minute cycle. This is 1/f fluctuation fan operation.

After appoximately 3 minutes, the compressor turns OFF, the outdoor fan turns OFF, and the indoor fan turns OFF.

After approximately 6 minutes, the conditions return to (1).

(1)

(2)

(3)

The frequency is increased at the rate of 0.5 Hz every 1 seconds.

Operates to effectively dehumidify the air while not excessively reducing the indoor temperature.

The indoor unit operates at 1/f fluctuation fan operation, at a fan speed that does not cause a chilly feeling.

48

7-2. Protective Functions

7-2-1. Defrost Detection and Release

(2) Clean defrost

If all indoor units are stopped during HEAT operation, and frost is detected at the L1 line, and the conditions for defrost are met, then defrost operation occurs, and the unit stops after defrost is completed.

(1) Non-stop defrosting

Heating operation

NOTE

Defrost does not occur during HIGH POWER operation.

If other stopped indoor units are started during defrost operation, they begin operating in defrost mode.

Frost detection

Non-stop defrosting

Releasing of defrosting

Defrosting sequence 4-way valve ON

Defrost detection occurs in either of the following cases:

• The temperature of the heat exchanger remains at or below the L1 line for 35 minutes after the start of HEAT operation.

•

Compressor Outdoor fan Solenoid valve (for hot gas bypass)

• Temperature of the outdoor heat exchanger is at or above the temperature shown in the table below.

Temperature of releasing

*1 The temperature for releasing of defrosting is (20 °C) or higher when the

outdoor air temperature is less than 0 °C.

• Defrost operation has continued for 12 minutes (max. length).

Indoor fan

(80 Hz) operation (4-way valve ON) OFF ON

OFF

• The temperature of the heat exchanger remains at or below the L2 line for 120 minutes after the start of HEAT operation.

Outdoor heat

exchanger temperature

Outdoor air temperature

(–20) 0

(– 6) (– 7)

(– 24) (– 25)

L2 L1

The numerical values such as temperature, frequency, time and current in parentheses are an example

of GRF318MR5I and the values are different from the other models.

NOTE

Defrost operation time

Heat exchanger temperature for releasing defrosting

Less than 2 minutes 2 minutes or more

No releasing 14 °C or higher (*1)

49

7-2-2. Current Control

The operating current may rise as a result of causes including increasing heating or cooling loads or decreases in power voltage. In these cases, the operating frequency is automatically reduced, or operation is stopped, in order to control the operating current so that it is (20 A) or less.

The operating frequency is reduced automatically, or operation is stopped, in order to control the operating current so that it is at or below the values shown in the table below.

(20A)

HEAT

Power breakers and fuses will not be tripped.

Operation can continue during this period with somewhat reduced heating or cooling capacity.

Operation at normal capacity is restored when the cause of the current rise is eliminated.

Description of function

•

Example of operation for heating

Current(A)

Frequency (Hz)

Trip

Hz reduction

Hz increase

prohibit

Hz reduction Hz increase prohibit

Hz reduction

Hz increase prohibit

(16)

(15.6)

0

(30)

Example of operation during cooling

Frequency

Frequency Current

Stops operation

Approx.3 minutes

Power Point C

Point B Point A

(20A) (17A)

(16.6A)

Target

frequency

Operates at the target frequency at Point A and below. Stops increases to the frequency between Points A and B. Reduces the frequency by 1 Hz per 0.5 seconds when Point B is exceeded. Stops operation, and restarts it appoximately 3 minutes later, if Point C is exceeded. (May operate when sudden voltage fluctuations occur. Indicates trouble.)

•

As a result:

(1) Automatic frequency control

The operating frequency upper limits shown in the figure below are established for frequency reduction and increase-prohibit.

(2) Current control

NOTE

During defrost operation, the COOL current setting value is used.

COOL

(20.0) (20.0)

(17.0) (17.0)

(16.6)

Point C (peak cut trip)

Point B (Hz reduction)

Point A (Hz increase prohibit) (16.6)

50

7-2-5. Control at HEAT Start-up

If HEAT operation is started when the outdoor air temperature is 15 °C or below, the unit operates at the HEAT start-up frequency (70 Hz or above).

Reset conditions

The compressor frequency exceeds the start-up frequency of (70 Hz).

The compressor thermostat is OFF.

Frequency reduction for indoor high-load control has occurred.

The outdoor air temperature is above 15 °C.

The main-unit switch on one or more indoor units is set to TEST run.

(1)

(2)

(3)

(4)

(5)

(110)

(106)

(100)

Trip

5Hz every 30 sec. reduction

2Hz every 30 sec. reduction

No control

Increase

prohibit range

(Hz reduction)

(°C)

Compressor discharge temperature

(90)

Within the increase-prohibit range, the range changes to the Hz reduction range (2 Hz every 30 seconds) if the compressor temperature rises by 2 °C.

*

Operation starts at (8 Hz), and the start current is less than the normal operating current. This prevents the flickering of fluorescent lights or television screens that occurs when ordinary A/C units start.

7-2-3. Low Start Current

To protect the compressor coil from overheating, the operating frequency is controlled based on the compressor discharge temperature.

7-2-4. Compressor Temperature Control

51

8. TROUBLESHOOTING

8-1. Precautions before Performing Inspection or Repair

Both the indoor unit and outdoor unit include electronic control circuits. Be sure to pay attention to the following before inspecting or repairing the outdoorside electronic circuits.

High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge (charging voltage DC 311 V) even after the power is turned OFF, and some time is required for the charge to dissipate.

Be careful not to touch any electrified parts before the control circuit board Power Lamp (red) turns OFF.

If the outdoor control circuit board is normal, approximately 180 seconds will be required for the charge to dissipate. However, allow at least 30 minutes for the charge to dissipate if it is thought there might be trouble with the outdoor control circuit board.

For example, if the outdoor control circuit board fuse has blown, approximately 30 minutes will be required to discharge the high-capacity electrolytic capacitors.

52

8-2. Trouble Diagnosis by Error Monitor Lamps

WARNING

To prevent electric shock, do not inspect or repair until the Power Lamp on the P.C.Board is turned off.

8-2-1. Location of the Error Monitor Lamps

Remove the top plate of outdoor unit and the cover of Electrical Component Box. The Power Lamp and Error Monitor Lamps are located on the P.C.Board of Electrical Component Box. (Fig.1)

8-2-2. Display of the Error Monitor Lamps

If a protective device has activated or there is a sensor failure in the outdoor unit, the 4 error monitor lamps on the outdoor control circuit board will indicate the nature of the trouble.

Heat Exchanger Rear side P.C.Board of Electrical Component Box.

Error Monitor Lamps

Front side

Fig.1 View from top

ERR0 ERR1 ERR2 ERR3

Power Lamp

Error Monitor Lamp

Error Contents

ERR0 ERR1 ERR2 ERR3

Sensor for compressor discharge temp

Sensor for heat excharge temp

Sensor for branch pipe A (Narrow tube)

Sensor for branch pipe B (Narrow tube)

Sensor for branch pipe C (Narrow tube)

Sensor for branch pipe D (Narrow tube)

Sensor for branch pipe A (Wide tube)

Sensor for branch pipe B (Wide tube)

Sensor for branch pipe C (Wide tube)

Sensor for branch pipe D (Wide tube)

HIC circuit trouble (current, temp)

Actuation of comp over load relay

Actuation of freeze protection function

Outdoor unit error. Detail of error message indicate on indoor LED

Outdoor temp sensor

: ON : OFF

53

8-3-1. Checking the outdoor unit

8-3. Checking the Outdoor System

8-3-2. Checking the defrost operation

Work procedure

Apply 220 V AC between terminals L and N on the

outdoor unit terminal plate.

•

Short-circuit the T-RUN terminal to the COM terminal

of TEST/T-RUN terminals.

•

The LED (red) on the control board must illuminate.•

The compressor, fan motor, 4-way valve, and solenoid

valve (for the hot gas bypass) must turn ON.

(They turn ON about (70) seconds later after the power

is turned ON.)

•

No.

1

2

Check items (unit operation)

Work procedure

Connect a dummy resistor of 39 k ohm to the outdoor coil temperature sensor connector.

• Non-stop defrost

The maximum length of defrost operation is 12 minutes. Defrost can also be released based on the below conditions for the outdoor heat exchanger sensor.

However, the condition is (20 °C) or higher when the outdoor air temperature is below 0 °C.

*1

(*1)

Less than 2 minutes Not released 2 minutes or more 14 °C or higher

•

No.

1

Check items (unit operation)

Indoor fan

Outdoor fan

CM

Solenoid valve

(for hot gas

bypass)

30 sec.

10 sec.5 sec.

(80 Hz)

ON

ONOFF OFF

OFFON

Defrost start Release

ON

Setting Setting

LL

Stop

NOTE

If the above check items are okay, but the outdoor unit does not operate, there may be a faulty

connection between the indoor unit and the outdoor unit.

Using forced defrost operation to check this function.

54

8-4. Trouble Diagnosis of Each Part

8-4-1. Problems of Each Part and Inspection Points

For details about the inspection points, refer to the Inspection Points for Each Part.

Problems

Inspection

points

Indoor unit

Indoor unit does not operate.

Self-Diagnostics check

Indoor controller (control unit)

Indoor fan motor

Room temperature sensor

Heat exchanger temperature sensor

Inter-unit cable

Switch circuit board

Outdoor control circuit board

Diode module

HIC

Electrolytic capacitor

Fuse

Compressor

Compressor protective sensor

Outdoor fan motor

4-way valve

Coil thermistor

Electric expansion valve

Branch tubing temperature sensor

Breaker

Refrigerant gas pressure

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

Operation lamp blinking.

Operation lamp does not illuminate.

Indoor fan dose not turn.

Outdoor unit does not operate.

Outdoor fan dose not turn.

4-way valve does not operate.

The compressor (only) does not

operate.

The compressor stops on occasion.

The compressor speed does not

increase.

The outdoor air temperature is high,

however defrost operation occurs.

Defrost operation does not occur.

The electric expansion valve does

not operate.

Does not cool or cooling

performance is inadequate.

Does not heat or heating

performance is inadequate.

Outdoor unit Others

No. of Inspection Points for Each part

Indoor unitOutdoor unitOthers

55

8-4-2. Inspection Points for Each Part

(1) Outdoor control circuit board

Refer to 8-3-1. Checking the outdoor unit.

(2) Fuse

Check it visually or the continuity with a tester.

(3) Compressor

Check for an open circuit in the compressor coil winding.

(4) Compressor protective sensor (compressor discharge temperature thermistor)

Check that the senseor is securely contained in the thermostart holder.

(5) 4-way valve

Short-circuit the T-RUN terminal to the COM terminal of TEST/T-RUN terminals. Perfrom a test run of the unit alone, and check whether the 4-way valve inside the outdoor unit produces a click sound.

(6) Coil thermistor

Check that the sensor is securely contained in the thermostat holder.

Do not remove or insert the outdoor control circuit board connector when power is being supplied to it. (The controller will be damaged.)

NOTE

No voltage on circuit board

(7) Electric expansion valve

When replacing the electric expansion valve and coil, be sure to attach the connectors in the correct positions. Labels are applied to the valve body and coil, corresponding to the connector colors, to identify them.

Controller check

Voltage varies

0 ohm

No temperature change Temperature changes

Replace the coil.

Open and close the

electric expansion valve

by hand to check it.

Replace the electric

expansion valve.

This part is normal.

Check elsewhere.

Check the illumination

of the red Power Lamp.

Replace the controller.

Check the coil resistance.

Use a multi-meter to measure the voltage (12 V).

Model No. Sequence

GRF148MR5I GRF198MR5I

GRF248MR5I GRF318MR5I

MV0 MV1

When the power is turned ON, the needle will move in the following seguence in approximately 10 to 20 seconds for each point.

Check the resistance between the gray lead wire and the other wires. Resistance is OK if it is 46 +/– 4ohm at 20 °C

Cool the main unit with a damp cloth or other means while welding. When applying vacuum, use the special service magnet and rotate at least 5 revolutions counterclockwise to fully open the electric expansion valve.

*1

Approx. 46 +/– 4 ohm

NOTE

If you have manually checked the electric expansion valve, be sure to reapply the outdoor power after you have replaced the wiring. (The position of the elecric expansion valve will changed.)

*1

MV0 MV1 MV2 MV3

Use the special service magnet and rotate 5 revolutions clockwise to fully close the valve. Then start the unit and measure the temperature at the inlet and outlet tubes of the electric expansion valve. If the temperature difference is large, the valve is closed. Then rotate 5 revolutions counterclockwise to open the valve. Operation is normal if the temperature difference between the 2 tubes drops.

56

(8) Branch tubing temperature sensor

Check that the sensor is securely contained in the thermostat holder.

(9) Breaker

Check whether or not the breaker has been tripped.

Check that the breakers and fuses used are of the specified capacity.

Check that the breaker and its line are exclusive for A/C use.

(10) Refrigerant gas pressure

Start a COOL test run, and messure the temperatures of the A/C intake air and discharge air. Compare the values with the performance charts.

If the values are higher than the performance charts: Check for refrigerant shortage or blockage of the refrigerant circuit.

< Assessment of refrigerant shortage >

1. The pressure in the low-pressure section is 5 MPa or more below the value in the performance charts.

2. There is little condensation on the indoor heat exchanger, which overall appears dry.

< Distinguishing between refrigerant shortage and refrigerant circuit blockage >

If the pressure in the low-pressure section does not change when the circuit is charged 2 to 3 times with refrigerant gas (0.44 lbs each time), or if the change is small, then the problem may not be refrigerant shortage. The problem may be a blockage of the refrigerant circuit.

1. Check that there is no internal leakage inside the 4-way valve:

At the low-pressure side tubing, check that there is no temperature difference between the intake and discharge of the 4-way valve.

2. Check that the electric expansion valve is not blocked. Check as described on the preceding page.

57

8-5. Trouble Diagnosis of Fan Motor

This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor. Perform the trouble diagnosis by Test Run mode described on Installation Instructions of indoor unit.

[Trouble symptom 1] The fan does not stop when the outdoor unit stops. Outdoor unit controller trouble

[Trouble symptom 2] The fan motor does not rotate when the outdoor unit is operating.

(Diagnostic procedure)

* Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoor

unit controller (3 locations).

(Diagnostic results)

All of the above measured values are normal. Fan motor trouble (Replace the motor.) Any one of the above measured values is not normal. Outdoor unit controller trouble

(Replace the controller .)

(Reference) DC motor connector pin arrangement

[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the outdoor

unit operates. (There is trouble in the system that provides feedback of motor rotation speed from the motor to the outdoor unit controller.)

[Trouble symptom 4] Fan motor rotation speed does not change during outdoor unit operation.

[Trouble symptom 5] Fan motor rotation speed varies excessively during outdoor unit operation.

(Remedy for symptom 3 to 5)

It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble. Therefore, first replace the outdoor unit controller, then (if necessary) replace the DC motor.

Important:

(A) Turn OFF the power before connecting or disconnecting the motor connectors. (B) When performing voltage measurement at the outdoor controller connector for (3) in the table

below, the DC motor will trip and voltage output will stop approximately 10 seconds after operation is started. For this reason, to measure the voltage again, first turn OFF the outdoor unit power, then, measure the voltage in Test Run mode.

Pin 1: Vm (red) Pin 2: Not used Pin 3: Not used Pin 4: Gnd (blue) Pin 5: Vcc (brown) Pin 6: PG (white) Pin 7: Vsp (orange)

GRF198MR5I GRF248MR5I / GRF318MR5I

Pin 1: Vs (white) Pin 2: Not used Pin 3: Not used Pin 4: Gnd (black) Pin 5: Vcc (red) Pin 6: FG (blue) Pin 7: Vsp (yellow)

GRF148MR5I

(1) Vs-Gnd : Between pin 1 and pin 4

or

Vm-Gnd : Between pin 1 and pin 4 (2) Vcc-Gnd : Between pin 5 and pin 4 (3) Vsp-Gnd : Between pin 7 and pin 4

Measurement location

DC 230V or more

DC 14V or more After fluctuating 4 times between DC 1.7 to 6.1V (1 sec. ON) and DC 0 V (1 sec. OFF), the DC motor trips.

Normal value

58

A

D

Flare tool for R410A

A

D

Conventional flare tool (R22)

Spacer

9. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT

9-1. Characteristics of New Refrigerant R410A

9-1-1. What is New Refrigerant R410A?

R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant, R22.

9-1-2. Components (mixing proportions)

HFC32 (50%) / HFC125 (50%)

9-1-3. Characteristics

Less toxic, more chemically stable refrigerant

The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase. Thus, when there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in composition of the remaining refrigerant.

Therefore, do not add new refrigerant.

Instead, recover the remaining refrigerant with the refrigerant recovery unit. Then, after evacuation, totally recharge the specified amount of refrigerant with the new refrigerant at its normal mixed composition state (in liquid phase).

When refrigerant R410A is used, the composition will differ depending on whether it is in gaseous or liquid phase, and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in gaseous state.

Thus, always charge the refrigerant while it is in liquid phase.

9-2. Checklist before Servicing

Use a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differ between these two tools. Where a conventional flare tool is used, make sure to observe A Specification (amount of extrusion) by using the flare spacer.

Size of flare

Ether-type oil is used for compressor oil for R410A-type units, which is different from the mineral oil used for R22. Thus more attention to moisture prevention and faster replacement work compared with conventional models are required.

CAUTION

Specification A

Diameter of tube D

Dia.6.35 mm (1/4")

Dia.9.52 mm (3/8")

Dia.12.7 mm (1/2")

Dia.15.88 mm (5/8")

Flare tool for R410A Conventional flare tool (for R22)

0 to 0.5 mm 1.2 mm

59

Tubing precautions

Refrigerant R410A is more easily affected by dust or moisture compared with R22, thus be sure to temporarily cover the ends of the tubing with caps or tape prior to installation.

Never use 0.7mm-thick copper tubing or tubing which is less than 0.8mm in thickness, since air conditioners with R410A are subject to higher pressure than those using R22 and R407C.

No addition of compressor oil for R410A

No additional charge of compressor oil is permitted.

No use of refrigerant other than R410A

Never use a refrigerant other than R410A.

If refrigerant R410A is exposed to fire

Through welding, etc., toxic gas may be released when R410A refrigerant is exposed to fire. Therefore, be sure to provide ample ventilation during installation work.

Caution in case of R410A leak

Check for possible leak points with the special leak detector for R410A. If a leak occurs inside the room, immediately provide thorough ventilation.

60

9-3. Tools Specifically for R410A

For servicing, use the following tools for R410A

Gauge manifold

Charging hose

Gas leak detector

Refrigerant cylinder

Charging cylinder

Refrigerant recovery unit

Vacuum pump with anti-reverse flow (*1)

(Solenoid valve-installed type, which prevents oil from flowing back into the

unit when the power is off, is recommended.)

Vacuum pump (*2)...can be used if the following adapter is attached.

Vacuum pump adapter (reverse-flow prevention adapter) (*3).

(Solenoid valve-installed adapter attached to a conventional vacuum pump.)

Electronic scale for charging refrigerant

Flare tool

Bender

Torque wrench

Cutter, reamer

Welding tool, nitrogen gas cylinder

Tools specifically for R410A

Tool Distinction Tool Name

Tools which can be com-

monly used for R22,

R407C, and R410A

CAUTION

The above tools specifically for R410A must not be used for R22 and R407C. Doing so will cause malfunction of the unit.

For the above vacuum pump (*1, *2) and vacuum pump adapter (*3), those for R22-type units can be used for R410A-type. However, they must be used exclusively for R410A and never alternately with R22 and R407C.

For details on tubing installation procedures, refer to the installation manuals attached to the indoor unit and outdoor unit.

NOTE

To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, shape and external diameter of the service port screw has been altered. <External diameter of service port> R410A : 7.94 mm (5/16")

R22, R407C : 6.35 mm (1/4")

9-4. Tubing Installation Procedures

When the tubes are connected,

always apply HAB oil on the flare portions to improve the sealing of tubing.

The following is the HAB oil generally used:

Esso: ZERICE S32

61

9-5. In Case of Compressor Malfunction

CAUTION

Should the compressor malfunction, be sure to make the switch to a replacement compressor as quickly as possible.

Use only the tools indicated exclusively for R410A. See "9-3. Tools Specifically for R410A."

9-5-1. Procedure for Replacing Compressor

(1) Recovering refrigerant

Any remaining refrigerant inside the unit should not be released to the atmosphere, but recovered using the refrigerant recovery unit for R410A.

Do not reuse the recovered refrigerant, since it will contain impurities.

(2) Replacing Compressor

Soon after removing seals of both discharge and suction tubes of the new compressor, replace it quickly.

(3) Checking for sealing

Use nitrogen gas for the pressurized gas, and never use a refrigerant other than R410A. Also do not use oxygen or any flammable gas.

(4) Evacuation

Use a solenoid valve-installed vacuum pump

so that even if power is cut off in the middle of evacuation of air due to a power interruption, the valve will prevent the pump oil from flowing back.

The equipment may be damaged if moisture remains in the tubing, thus carry out the evacuation thoroughly.

When using a vacuum pump with exhaust air volume more than 25L/min. and ultimate vacuum pressure rate of

0.05Torr.

Standard time for evacuation

(1) Recover refrigerant

OK

(2) Replace compressor

OK

(3) Check for sealing

OK

(4) Evacuation

OK

(5) Recharge

Length of tubing

Evacuation time

Less than 10 meters

More than 10 minutes

More than 10 meters

More than 15 minutes

62

Valve

Single valve

Charge liquid refrigerant with cylinder in up-side-down position.

Single valve (with siphon tube)

Charge with cylinder in normal position.

Liquid

Valve

Liquid

Charging

cylinder

Open

Refrigerant

cylinder

Liquid

NO!

CAUTION

Never charge a large amount of liquid refrigerant at once to the unit. This may cause damage to the compressor.

CAUTION

To prevent the composition of R410A from changing, never bleed the refrigerant gas into the atmosphere while transferring the refrigerant. (Fig. 3)

(5) Recharging

Be sure to charge the specified amount of refrigerant in liquid state

using the service port of the wide tube service valve. The proper amount is listed on the unit's nameplate.

When the entire amount cannot be charged all at once, charge gradually while operating the unit in Cooling Operation.

When charging with a refrigerant cylinder, use an electronic scale for charging refrigerant. In this case, if the volume of refrigerant in the cylinder becomes less than 20% of the fully-charged amount, the composition of the refrigerant starts to change. Thus,

do not use the refrigerant if the amount in the charging cylinder is less than 20%.

Also, charge the minimum necessary amount to the charging cylinder before using it to charge the air conditioning unit.

Example:

In case of charging refrigerant to a unit requiring

0.76Kg using a capacity of a 10Kg cylinder, the minimum necessary amount for the cylinder is:

0.76 + 10 0.20 = 2.76Kg

For the remaining refrigerant, refer to the instructions of the refrigerant manufacturer.

If using a charging cylinder, transfer the specified amount of liquid refrigerant from the refrigerant cylinder to the charging cylinder.

Prepare an evacuated charging cylinder beforehand.

Do not use the refrigerant if the amount in the charging cylinder is less than 20%.

Configuration and characteristics of cylinders

Fig. 1

Fig. 2

Fig. 3

63

Length of tubing

Evacuation time

Less than 10 meters

More than 10 minutes

More than 10 meters

More than 15 minutes

9-6. In Case Refrigerant is Leaking

CAUTION

Never attempt to charge additional refrigerant when refrigerant has been leaking from the unit. Follow the procedure described below to locate points of leaks and carry out repairs, then recharge the refrigerant.

(1) Detecting Leaks

Use the detector for R410A to locate refrigerant leak points.

(2) Recovering refrigerant

Never release the gas to the atmosphere; recover residual refrigerant using the refrigerant recovery unit for R410A, instead.

Do not reuse the recovered refrigerant because its composition will have been altered.

(3) Welding leaking points

Confirm again that no residual refrigerant exists in the unit before starting welding.

Weld securely using flux and wax for R410A.

Prevent oxide film from forming inside the tubes utilizing substitution with nitrogen (N2) in the refrigerant circuit of the unit. Leave ends of tubes open during welding.

(4) Checking for sealing

Use nitrogen gas for the pressurized gas, and never use a refrigerant other than R410A. Also do not use oxygen or any flammable gas.

(5) Evacuation

Use a solenoid valve-installed vacuum pump

so that even if power is cut off in the middle of evacuation of air due to a power interruption, the valve will prevent the pump oil from flowing back.

The equipment may be damaged if moisture remains in the tubing, thus carry out the evacuation thoroughly.

When using a vacuum pump with exhaust air volume more than 25L/min. and ultimate vacuum pressure rate of

0.05Torr.

Standard time for evacuation

(6) Recharging

Recharge unit in the same manner explained on the previous page "(5) Recharging."

(2) Recover refrigerant

OK

(3) Weld leaking points

OK

(4) Check for sealing

OK

(5) Evacuation

OK

(6) Recharge

(1) Detect leaks

OK

64

9-7. Charging Additional Refrigerant

9-7-1. When Tubes are Extended

Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit.

Charge additional refrigerant in liquid state only.

9-8. Retro-Fitting Existing Systems

9-8-1. Use of Existing Units

Never use new refrigerant R410A for existing units which use R22.

This will cause the air conditioner to

operate improperly and may result in a hazardous condition.

9-8-2. Use of Existing Tubing

If replacing an older unit that used refrigerant R22 with a R410A unit,

do not use its existing tubing.

Instead,

completely new tubing must be used.

CAUTION

Never charge additional refrigerant if refrigerant is leaking from the unit. Follow instructions given in "9-6. In Case Refrigerant is Leaking" and completely carry out repairs. Only then should you recharge the refrigerant.

65

INSTALLATION INSTRUCTIONS

GRF148MR5I GRF198MR5I GRF248MR5I GRF318MR5I

(II-852-6-4190-446-00-0)

APPENDIX A

A-1

Contents

Page

IMPORTANT!

Please Read Before Starting .................................. 2

1. GENERAL .......................................................... 3

1-1. Tools Required for Installation (not supplied) 1-2. Accessories Supplied with Unit 1-3. Optional Copper Tubing Kit 1-4. Type of Copper Tube and Insulation Material 1-5. Additional Materials Required for Installation

2. INSTALLATION SITE SELECTION ................... 4

2-1. Indoor Unit 2-2. Connecting Indoor Units 2-3. Outdoor Unit 2-4. Outer Dimensions of Outdoor Unit 2-5. Diagram of Outdoor Unit Installation

3. INSTALLATION PROCESS .............................. 13

3-1. Embedding the Tubing and Wiring 3-2. Drain Cap and Drain Elbow 3-3. Use of the Flaring Method 3-4. Flaring Procedure with a Flare Tool 3-5. Caution Before Connecting Tubes Tightly 3-6. Tubing Connections 3-7. Insulation of Refrigerant Tubing 3-8. Taping the Tubes 3-9. Finishing the Installation

4. AIR PURGING................................................... 16

I Air Purging with a Vacuum Pump (for Test Run) I Pump Down

5. WIRING INSTRUCTIONS ................................ 19

5-1. General Precautions on Wiring 5-2. Recommended Wire Length and Diameter 5-3. Wiring System Diagram 5-4. How to Connect Wiring to the Terminal 5-5. Wiring Instructions for the Outdoor Unit

6. TEST RUN......................................................... 23

7. CONNECTING A HOME AUTOMATION

DEVICE ............................................................. 24

8. INSTALLATION CHECK SHEET...................... 24

9. ELECTRIC WIRING DIAGRAM ........................ 25

Model Combinations

Combine indoor and outdoor units only as listed below.

Indoor Unit Outdoor Unit

MCAF78MR5I GRF148MR5I MCAF98MR5I GRF198MR5I MCAF128MR5I GRF248MR5I MCAF188R5I GRF318MR5I MCAF248R5I

Combine indoor and outdoor units only as listed in the combination tables for 2-room, 3-room or 4-room outdoor unit as shown in its respective manual.

Power Source: 50 Hz, single-phase, 220 – 240 VAC

This air conditioner uses the new refrigerant R410A.

Be sure to read the yellow instruction sheet attached to the outdoor unit for models using the new refrigerant R410A.

The illustrations are based on the typical appearance of a standard model. Consequently, the shape may differ from that of the air conditioner that you are installing.

Combination example

For Outdoor Unit

85264190446000 12/2007

FrançaisEnglish

INSTALLATION INSTRUCTIONS

– Multi Split system air conditioner –

COOL/ DRY/HEAT Model

Indoor unit B

Indoor unit A

Indoor unit C

Outdoor unit

Indoor unit D

NOTE

2

English

IMPORTANT! Please Read Before Starting

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

G

Carefully read this instruction booklet before beginning.

G

Follow each installation or repair step exactly as shown.

G

Observe all local, state, and national electrical codes.

G

Pay close attention to all warning and caution notices given in this manual.

This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage.

If Necessary, Get Help

These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

• Do not supply power to the unit until all wiring and tub-

ing are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this

system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or

death.

• Ground the unit following local electrical codes.

• Connect all wiring tightly. Loose wiring may cause over-

heating at connection points and a possible fire hazard.

• Install a protective leakage breaker depending on the

installation location (especially a damp or humid location). If a leakage breaker is not installed, electric shock can occur.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.

When Installing…

…In a Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the unit’s weight. It may be necessary to construct a strong wood or metal frame to provide added support.

…In a Room

Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water damage to walls and floors.

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

…In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.

…In a Snowy Area (for Heat Pump-type Systems)

•

Position the outdoor unit in a protected location where snow will not blow into it.

• Install the outdoor unit on a raised platform that is

higher than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

• Use the flare method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection.

• Check carefully for leaks before starting the test run.

When Servicing

• Turn the power OFF at the main power box (mains) before opening the unit to check or repair electrical parts and wiring.

• Keep your fingers and clothing away from any moving parts.

• Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced.

Others

• Ventilate any enclosed areas when installing or testing the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas.

• Confirm upon completing installation that no refrigerant gas is leaking. If escaped gas comes in contact with a stove, gas water heater, electric room heater or other heat source, it can produce dangerously toxic gas.

• Do not install only a single indoor unit.

WARNING

CAUTION

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1. General

This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instructions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning. If the electric wiring diagram does not appear in this manual, please check for the diagram on the indoor unit.

1-1. Tools Required for Installation (not supplied)

1. Standard screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

5. Carpenter’s level

6. Sabre saw or key hole saw

7. Hacksaw

8. Core bits

9. Hammer

10. Drill

11. Tube cutter

12. Tube flaring tool

13. Torque wrench

14. Adjustable wrench

15. Reamer (for deburring)

16. Vacuum pump (For R410A)

17. Manifold valve

1-2. Accessories Supplied with Unit

Table 1

1-3. Optional Copper Tubing Kit

Copper tubing for connecting the outdoor unit to the indoor unit is available in kits which contain the narrow and wide tubing, fittings and insulation. Consult your nearest sales outlet or Air Conditioner workshop.

1-4. Type of Copper Tube and Insulation Material

If you wish to purchase these materials separately from a local source, you will need:

1. Deoxidized annealed copper tube for refrigerant tubing as detailed in Table 2.

Cut each tube to the appropriate lengths +30 cm to 40 cm to dampen vibration between units.

Model

Narrow Tube Wide Tube

Outer Dia. Thickness Outer Dia. Thickness

MCAF78 6.35 mm 0.8 mm 9.52 mm 0.8 mm

MCAF98 6.35 mm 0.8 mm 9.52 mm 0.8 mm

MCAF128 6.35 mm 0.8 mm 9.52 mm 0.8 mm

MCAF188 6.35 mm 0.8 mm 12.70 mm 0.8 mm

MCAF248 6.35 mm 0.8 mm 15.88 mm 1.0 mm

Labels for inter-unit cable and tube

Cushion rubber 4 Drain cap

Packed in the outdoor unit.

1GRF198

1GRF248

2

4

each

5

4

GRF318

GRF198/248/318

GRF148

1

Drain elbow

Parts Figure Q’ty Parts Figure Q’ty

Reducer (ø9.52 ø12.70)

Reducer (ø12.70 ø9.52)

ABCD

Table 2

2. Foamed polyethylene insulation for the specified copper tubes as required to precise length of tubing. Wall thickness of the insulation should be not less than 8 mm.

3. Use insulated copper wire for field wiring. Wire size varies with the total length of wiring. Refer to 5. Wiring Instructions for details.

CAUTION

Check local electrical codes and regulations before obtaining wire. Also, check any specified instructions or limitations.

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1-5. Additional Materials Required for Installation

1. Refrigeration (armored) tape

2. Insulated staples or clamps for connecting wire (See local codes)

3. Putty

4. Refrigeration lubricant

5. Clamps or saddles to secure refrigerant tubing

2. Installation Site Selection

2-1. Indoor Unit

AVOID:

G direct sunlight.

G nearby heat sources that may affect performance of the

unit.

G areas where leakage of flammable gas may be expected.

G placing or allowing any obstructions near the Air Condi-

tioner inlet or outlet.

G installing in rooms that contain instant-on (rapid-start)

fluorescent lamps. (These may prevent the Air Conditioner from receiving signals.)

G places where large amounts of oil mist exist. G installing in locations where there are devices that

generate high-frequency emissions.

DO:

G select an appropriate position from which every corner of

the room can be uniformly cooled. (High on a wall is best.)

G select a location that will hold the weight of the unit.

G select a location where tubing and drain hose have the

shortest run to the outside. (Fig. 1)

G allow room for operation and maintenance as well as

unrestricted air flow around the unit. (Fig. 2)

G install the unit within the maximum elevation difference

(H1, H2, H3, H4) above or below the outdoor unit and within a total tubing length (L1+L2, L1+L2+L3, L1+L2+L3+L4) from the outdoor unit as detailed in Table 3 and Fig. 3a.

Fig. 1

Fig. 2

INDOOR UNIT (1)

INDOOR UNIT (4)

INDOOR UNIT (3)

INDOOR UNIT (2)

Tubing length (L1)

L2

L3

L4

H2

H3

H4

OUTDOOR UNIT

Elevation difference (H1)

Fig. 3a

WARNING

To prevent abnormal heat generation and the possibility of fire, do not place obstacles, enclosures and grilles in front of or surrounding the air conditioner in a way that may block air flow.

Fig. 3b

For stable operation of the air conditioner, do not install wall-mounted type indoor units less than 1.5 m from floor level.

CAUTION

5 cm

min.

Indoor unit

Outside drainage

Front View

15 cm min.

Drain hose

5 cm min.

Indoor unit

Minimum height from floor level

1.5 m

Floor level

Wall

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G Install the indoor unit more than 1 meter away from any

antenna or power lines or connecting wires used for television, radio, telephone, security system, or intercom. Electrical noise from any of these sources may affect operation.

G install in a sturdy manner to avoid increased operating

noise.

Table 3

* If total tubing length becomes 45 to 60 m (max.) or 45 to 70 m (max.), charge additional refrigerant (R410A) by 20 g/m.

No additional charge of compressor oil is necessary.

2-2. Connecting Indoor Units

(1) Connecting indoor unit for GRF148MR5I

ø12.70Unionø9.52Flare

A joint for connecting tubes of different sizes (ø9.52 ø12.70) Supplied Reducer

ø9.52

ø6.35

ø12.70

ø6.35

ø9.52

B

ø9.52

A

Outdoor unit Indoor unit

(MCAF78/98/128MR5I)

(MCAF188R5I)

ø9.52

ø6.35

ø9.52

ø6.35

ø9.52

B

ø9.52

A

Outdoor unit Indoor unit

(MCAF78/98/128MR5I)

(A)

(B)

Max. Allowable Max. Allowable Total Limit of Limit of Elevation Required Amount

Tubing Length Tubing Length Total Tubing Length Difference of Additional

Model per unit at shipment (L1+L2) or (L1+L2+L3) (H1, H2, H3, H4) Refrigerant

(m) (L1+L2) or (L1+L2+L3) or (L1+L2+L3+L4) (m) (g/m)*

or (L1+L2+L3+L4) (m)

(m)

GRF148 20 30 (L1+L2) 30 (L1+L2) 15 –

GRF198 25 45 (L1+L2) 45 (L1+L2) 15 –

GRF248 25 45 (L1+L2+L3+L4) 60 (L1+L2+L3+L4) 15 20

GRF318 30 45 (L1+L2+L3+L4) 70 (L1+L2+L3+L4) 15 20

(2) Connecting indoor unit for GRF198MR5I

unit: mm

Fig. 4b

Fig. 4c

ø9.52

ø6.35

ø9.52

ø6.35

ø9.52

B

ø9.52

A

Outdoor unit Indoor unit

(MCAF78/98/128MR5I)

Fig. 4a

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(A)

Fig. 4d

(3) Connecting indoor unit for GRF248MR5I

(B)

Fig. 4e

(C)

Fig. 4f

unit: mm

Outdoor unit Indoor unit

D

ø9.52

C

ø9.52

B

ø9.52

A

ø12.70

(ø12.70 ø9.52) Supplied Reducer

ø6.35

ø9.52Unionø12.70Flare

ø9.52

Outdoor unit Indoor unit

D

ø9.52

C

ø9.52

B

ø9.52

A

ø12.70

ø6.35

ø9.52

ø12.70

(MCAF78/98/128MR5I)

(MCAF188R5I)

Outdoor unit Indoor unit

D

ø9.52

C

ø9.52

B

ø9.52

A

ø12.70

(ø12.70 ø15.88) Locally purchased

ø6.35

ø15.88Unionø12.70Flare

ø9.52

ø15.88

(MCAF78/98/128MR5I)

(MCAF248R5I)

(A)

Fig. 4h

(4) Connecting indoor unit for GRF318MR5I

(B)

Fig. 4i

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English

(D)

Fig. 4g

unit: mm

Outdoor unit Indoor unit

D

ø9.52

C

ø9.52

B

ø9.52

A

ø12.70

(ø12.70 ø15.88) Locally purchased

ø6.35

ø15.88Unionø12.70Flare

Outdoor unit Indoor unit

D

ø9.52

C

ø9.52

B

ø12.70

A

ø12.70

(ø12.70 ø9.52) Supplied Reducer

ø6.35

(ø9.52 ø12.70) Locally purchased

ø6.35

ø9.52Unionø12.70Flare

ø9.52

ø12.70

ø15.88

ø9.52

ø6.35

(MCAF78/98/128MR5I)

(MCAF188R5I)

(MCAF248R5I)

ø12.70Unionø9.52Flare

(MCAF78/98/128MR5I)

Outdoor unit Indoor unit

D

ø9.52

C

ø9.52

B

ø12.70

A

ø12.70

(ø12.70 ø9.52) Supplied Reducer

ø6.35

ø9.52Unionø12.70Flare

ø9.52

(MCAF78/98/128MR5I)

ø9.52

(MCAF78/98/128MR5I)

ø9.52

(MCAF78/98/128MR5I)

ø12.70

(MCAF188R5I)

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English

(C)

Fig. 4j

(D)

Fig. 4k

(E)

Fig. 4l

unit: mm

Outdoor unit Indoor unit

D

ø9.52

C

ø9.52

B

ø12.70

A

ø12.70

ø6.35

ø9.52

ø12.70

Outdoor unit Indoor unit

D

ø9.52

C

ø9.52

B

ø12.70

A

ø12.70

(ø12.70 ø15.88) Locally purchased

ø6.35

ø15.88Unionø12.70Flare

(ø12.70 ø9.52) Supplied Reducer

ø9.52

ø15.88

(MCAF78/98/128MR5I)

(MCAF188R5I)

(MCAF78/98/128MR5I)

(MCAF248R5I)

ø9.52Unionø12.70Flare

Outdoor unit Indoor unit

D

ø9.52

C

ø9.52

B

ø12.70

A

ø12.70

(ø12.70 ø15.88) Locally purchased

ø6.35

ø9.52

ø12.70

ø15.88

ø6.35

ø15.88Unionø12.70Flare

(MCAF78/98/128MR5I)

(MCAF188R5I)

(MCAF248R5I)

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2-3. Outdoor Unit

AVOID:

G heat sources, exhaust fans, etc. (Fig. 5a) G damp, humid or uneven locations.

DO:

G position the outdoor unit in a protected location

where snow will not blow into it.

G choose a place as cool as possible. G choose a place that is well ventilated. G allow enough room around the unit for air intake/

exhaust and possible maintenance. (Fig. 5b-1 or 5b-2)

G provide a solid base (level concrete pad, concrete

block, 10 × 40 cm or 15 × 40 cm beams or equal), a minimum of 10 cm or 15 cm above ground level to reduce humidity and protect the unit against possible water damage and decreased service life. (Fig. 5c-1 or 5c-2)

G Install cushion rubber under unit’s feet to reduce

vibration and noise. (Fig. 5d)

G use lug bolts or equal to bolt down unit, reducing

vibration and noise.

G Install in a location where no antenna of a television

or radio exists within 3 meters.

Outdoor unit

Hot air

Heat source

Exhaust fan

NO

Fig. 5a

Fig. 5c-2

Fig. 5d

Fig. 5b-1

Fig. 5b-2

Fig. 5c-1

(GRF148)

(GRF198, GRF248, GRF318)

(GRF148)

(GRF198, GRF248, GRF318)

Air intake

Concrete or equal

Anchor bolts (4 pcs.)

Min. 10 cm

Air intake Min. 10 cm

Min.

5 cm

Air discharge

Min. 40 cm

Air intake Min. 20 cm

Min.

10 cm

Air discharge

Min. 50 cm

Valve side Min. 25 cm

Obstacle above

Min.

2 m

Air discharge

Ground

Obstacle above

Min.

2 m

Air discharge

Ground

Min.

2 m

Obstacle

Min. 10 cm Air intake

Min.

2 m

Obstacle

Min. 20 cm Air intake

About 40 cm

Air intake

Concrete or equal

About 40 cm

About 10 cm

Anchor bolts (4 pcs.)

Min. 15 cm

Cushion rubber

About 15 cm

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(2) GRF198MR5I

(3) GRF248MR5I

(4) GRF318MR5I

2-4. Outer Dimensions of Outdoor Unit

Fig. 6d

unit: mm

Fig. 6c

Fig. 6b

(1) GRF148MR5I

608

85 790

310

285

336

70

569

15

158

70

46

122

70

142

A

(Outer diameter ø

6.35

)

(Outer diameter ø

9.52

)

Service valve on wide tube side

Service valve on narrow tube side

Fig. 6a

608

136

12

A

900

85

608

A

136

12

136

12

320

345

369

A

900

A

900

85

Service valve on narrow tube side

(Outer diameter ø Service valve on

740

72

18

150

114

51

740

18

150 72 7070

51

wide tube side (Outer diameter ø

75

113

Service valve on narrow tube side (Outer diameter ø

Service valve on wide tube side (Outer diameter ø

70

75 70

113

Service valve on wide tube side

114

(Outer diameter ø

6.35

9.52

6.35

9.52

12.70

)

A

320

345

369

Service valve on narrow tube side (Outer diameter ø

890

70 70 73

150

51

114

18

Service valve on wide tube side (Outer diameter ø

70 70 75

113

Service valve on wide tube side (Outer diameter ø

6.35

9.52

12.70

)

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2-5. Diagram of Outdoor Unit Installation

Never install only a single indoor unit.

(1) GRF148MR5I

Fig. 6e

Be sure to connect indoor and outdoor units only in combinations that are listed in the catalog or in the combination table that was provided with the outdoor unit. (Use caution. Connecting any other model may result in operation failure and malfunction.)

The dimensions indicated by in the figure below are spaces that are required in order to maintain performance. Install in a location where the dimensions indicated by are ensured, and where 2 or more faces of the unit are unobstructed. In principle, the top direction should be unobstructed.

Indoor unit B

Indoor unit A

Over 5cm

Ensure 15cm of space if a drain hose is to be used.

Over 40cm

Ba

se (not provided)

(concrete or similar material)

Over 10cm

Fasten with anchor bolts (not provided) (3/8" or M10, 4 locations)

Power breaker

B A

Service space

Over 25cm

Access panel C

Ground wire (not provided)

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English

Be sure to connect indoor and outdoor units only in combinations that are listed in the catalog or in the combination table that was provided with the outdoor unit. (Use caution. Connecting any other model may result in operation failure and malfunction.)

The dimensions indicated by in the figure below are spaces that are required in order to maintain performance. Install in a location where the dimensions indicated by are ensured, and where 2 or more faces of the unit are unobstructed. In principle, the top direction should be unobstructed.

Indoor unit C

Indoor unit B

Indoor unit A

Indoor unit D

Service space

Power breaker

Ground wire (not provided)

Ensure 15cm of space if a drain hose is to be us

ed.

Base (not provided) (concrete or similar material)

Fasten with anchor bolts (not provided) (3/8" or M10, 4 locations)

A

B

C

D

Access panel C

Over 25cm

Over 20cm

Over 10cm

Over 50cm

Fig. 6f

(2) GRF198MR5I, GRF248MR5I, GRF318MR5I

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English

3. Installation Process

3-1. Embedding the Tubing and Wiring

G Do not connect tubes to locations that are embedded.

G Be sure to bind refrigerant tubing and inter-unit cables

together with vinyl tape.

G The power cable must be obtained on-site.

(ø3.5: Less than 26 m)

G Be sure to apply the provided labels to both ends of

the inter-unit cables to prevent miswiring.

G Securely seal the end of embedded tubing with vinyl

tape in order to prevent dirt or moisture entry.

G In order to prevent insulation breakdown and ground

faults, do not allow the wire ends to contact rainwater, or be subject to dew condensation.

Fig. 8

3-3. Use of the Flaring Method

Many of the conventional split system air conditioners employ the flaring method to connect refrigerant tubes which run between indoor and outdoor units. In this method, the copper tubes are flared at each end and connected with flare nuts.

3-4. Flaring Procedure with a Flare Tool

(1) Cut the copper tube to the required length with a

tube cutter. It is recommended to cut approx. 30 – 50 cm longer than the tubing length you estimate.

(2) Remove burrs at the end of the copper tube with a

tube reamer or file. This process is important and should be done carefully to make a good flare. (Fig. 8)

3-2. Drain Cap and Drain Elbow

First refer to Section 2. Installation Site Selection.

The drain hole at the bottom of the outdoor unit was not plugged at the time of factory shipment. If necessary, plug the drain hole with the accessory drain cap or mount the accessory drain elbow before installing the outdoor unit. (Fig. 7a or 7b)

Accessory drain cap

Accessory drain elbow

Outdoor unit

Fig. 7b

CAUTION

When installing in a cold area where drainage water may freeze, do not attach the provided drain cap or drain elbow to the bottom plate of the unit.

Accessory drain cap

Accessory drain elbow

Outdoor unit

Fig. 7a

(GRF148)

(GRF198, GRF248, GRF318)

NOTE

Before

Deburring

After

14

English

When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 9)

(3) Remove the flare nut from the unit and be sure to mount

it on the copper tube.

(4) Make a flare at the end of copper tube with a flare tool.*

(Figs. 10 and 11)

(*Use “RIDGID” or equivalent.)

A good flare should have the following characteristics:

G inside surface is glossy and smooth. G edge is smooth. G tapered sides are of uniform length.

3-5. Caution Before Connecting Tubes Tightly

a) Be sure to apply a sealing cap or water-proof tape to

prevent dust or water from getting into the tubes before they are used.

b) Be sure to apply refrigerant lubricant to the matching

surfaces of the flare and union before connecting them together. This is effective for reducing gas leaks. (Fig. 12)

c) For proper connection, align the union tube and flare

tube straight with each other, then screw in the flare nut lightly at first to obtain a smooth match. (Fig. 13)

3-6. Tubing Connections

a) Temporary connection:

Screw in 3 – 5 rotations by hand. (Fig.14)

b) To fasten the flare nuts, apply specified torque as:

Table 4

NOTE

Fig. 9

Fig. 11

Fig. 10

Fig. 12

Flare nut

Union

Fig. 13

0 – 0.5 mm

If the special R410A flare tool is used:

1.2 mm

If the previous flare tool (clutch-type) is used:

Adjust so that the amount of tube protrusion is as shown in the figure.

Apply the provided labels to the indoor and outdoor unit tubing connectors to prevent errors in connections.

Service valve on narrow tube side

Service valve on wide tube side

A

B

C

D

Fig. 14

Tube Dia. Tightening Torque

6.35 mm 14 – 18 N·m (140 – 180 kgf · cm)

9.52 mm 34 – 42 N·m (340 – 420 kgf · cm)

12.70 mm 49 – 61 N·m (490 – 610 kgf · cm)

15.88 mm 68 – 82 N·m (680 – 820 kgf · cm)

Copper tubing

NOTE

Reamer

Flare nut

Copper tubing

Flare tool

Apply refrigerant lubricant here and here

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English

3-7. Insulation of Refrigerant Tubing

To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a

proper insulation material.

The thickness of the insulation should be a minimum 8 mm. (Fig. 17)

3-8. Taping the Tubes

(1) At this time, the 2 refrigerant tubes (and electrical wire

if local codes permit) should be taped together with armoring tape. The drain hose may also be included and taped together as 1 bundle with the tubing.

(2) Wrap the armoring tape from the bottom of the outdoor

unit to the top of the tubing where it enters the wall. As you wrap the tubing, overlap half of each previous tape turn. (Fig. 18)

(3) Clamp the tubing bundle to wall, using 1 clamp approx.

every 120 cm.

Do not wind the armoring tape too tightly, since this will decrease the heat insulation effect. Also, be sure the condensation drain hose splits away from the bundle and drips clear of the unit and the tubing.

3-9. Finishing the Installation

After finishing insulating and taping over the tubing, use sealing putty to seal off the hole in the wall to prevent rain and draft from entering. (Fig. 19)

NOTE

IMPORTANT

Indoor unit

Outdoor unit

Spanner

Torque wrench

Fig. 15

Fig. 17

Fig. 18

Clamp

Insulated tubes

Apply putty here

Tubing

Fig. 19

CAUTION

After a tube has been insulated, never try to bend it into a narrow curve, as this may cause the tube to break or crack.

Insulation

Fig. 16

CAUTION

Be sure to match refrigerant tubing and electric wiring between indoor and outdoor units. For more details, refer to “Tubing Check Control” in the Technical & Service Manual.

Insulation

Min. 8 mm

Thickness: min. 8 mm

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English

4. Air Purging

Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. Therefore, they must be purged completely.

G pressure in the system rises G operating current rises G cooling efficiency drops G moisture in the air may freeze and block capil-

lary tubing

G water may lead to corrosion of parts in the

refrigerant system

I Air Purging with a Vacuum Pump

(for Test Run)

G In order to protect the earth’s environment, be

sure to use a vacuum pump to perform the air purge. (Never perform an air purge by using the refrigerant gas cylinder or other external gas, or by using the gas inside the outdoor unit.) Perform the air purge for tubes A, B, C, and D. Use the same procedures for all tubes.

(1) Check that each tube (both narrow and wide

tubes) between the indoor and outdoor units have been properly connected and all wiring for the test run has been completed. Note that both narrow and wide tube service valves on the outdoor unit are kept closed at this stage.

(2) Using an adjustable wrench or box wrench,

remove the valve caps from the service valve on both narrow and wide tubes.

(3) Connect a vacuum pump and a manifold valve

(with pressure gauges) to the service port on the wide tube service valve. (Fig. 20).

Fig. 20

Fig. 21

CAUTION

Be sure to use a manifold valve for air purging. If it is not available, use a stop valve for this purpose. The “Hi” knob of the manifold valve must always be kept closed.

CAUTION

Before using the vacuum pump adapter, read the vacuum pump adapter manual, and use the adapter correctly.

In order to prevent charging errors with Air Conditioner that uses R410A, the screw diameter at the service valve charging port has been changed. When recharging or performing other servicing, use the special charging hose and manifold gauge.

G When using a hex wrench to open the spindle, an

extremely small amount of refrigerant may leak. This does not indicate a problem.

G Use a hex wrench of a type to which force can be

easily applied.

Service valve on wide tube side

Service valve on narrow

A

B

C

D

Vacuum pump

Vacuum pump adapter (for preventing reverse flow) (special for R410A)

High-pressure valve

Manifold gauge (special for R410A)

Low-pressure valve

Leave the valve open.

Open

Charging hose (special for R410A)

Hex wrench (nominal size 4mm, not provided)

With push-pin

HiLo

Stopper

Spindle

Screw diameter: 1/2 UNF 20 threads

Valve core

Cap nut tightening torque: 7 – 11 N·m (70 – 110 kgf·cm) (Tighten by hand, then use a wrench to turn approximately 30 .)

Cap tightening torque: 20 – 25 N·m (200 – 250 kgf·cm) (Tighten by hand, then use a wrench to turn.)

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English

(4) With the “Lo” knob of the manifold valve open and

high-pressure valve (“Hi”) closed completely, run the vacuum pump. Run the pump until the pressure is –101 kPa (–76 cmHg). The operation time for the vacuum pump varies with tubing length and the capacity of the pump. The following table shows the amount of time required for evacuation:

Table 5

The required time in the above table is calculated based on the assumption that the ideal (or target) vacuum condition is around 10 mmHg abs.

(5) With the vacuum pump still running, close the “Lo”

knob of the manifold valve. Then stop the vacuum pump. Fully close the low-pressure valve and stop the vacuum pump. (Wait 1 – 2 minutes and check that the manifold gauge pointer does not return. If it does return, find and repair the leak, then apply the vacuum again.)

(6) With a hex wrench, turn the valve stem on the nar-

row tube service valve counter-clockwise by 90 degrees (1/4 turn) for 10 seconds, and then turn the stem clockwise to close it again.

(7) With a standard screwdriver, turn the wide tube

service valve stem counterclockwise to fully open the valve.

(8) Turn the narrow tube service valve stem counter-

clockwise to fully open the valve.

(9) Loosen the vacuum hose connected to the wide

tube service port slightly to release the pressure. Then, remove the hose.

(10) Leak test all joints at the tubing (both indoor and

outdoors) with liquid soap. Bubbles indicate a leak. Be sure to wipe off the soap with a clean cloth.

CAUTION

Be sure to completely insert the hex wrench before attempting to turn the valve.

Required time for evacuation when capacity

of 100 liter/h vacuum pump is used

20 min. or more

CAUTION

If a CFC gas detector is used, use a special detector for HFC refrigerant (such as R410A and R134a).

NOTE

18

English

I Pump Down

G When relocating or disposing of the Air Conditioner, request

this service from the dealer where the unit was purchased, or from an appropriate agent. Perform pump-down as described below.

What is pump-down?

G Pump-down refers to recovering the refrigerant gas from the

refrigerant cycle at the outdoor unit. This work must be performed during cooling operation. The refrigerant gas cannot be recovered during heating operation.

G During winter, or if the temperature sensor prevents cooling

operation, perform “forced cooling operation.”

Pump-down procedure

(1) Fully close the spindles at the valves on the narrow tube

side of tubes A, B, C and D. (Refer to Fig. 22.)

(2) Connect the manifold gauge to the charging port at the valve

on the wide tube side of tube D. Purge the air from the charging hose. (Refer to Fig. 23.)

(3) Perform cooling operation or forced cooling operation.

When the pressure at the low-pressure side is 0.15 – 0.2 MPa (0.5 – 1 kg/cm

2

G), fully close the spindles at the valves on the wide tube side of tubes A, B, C, and D, and immediately stop operation. (Refer to Fig. 23.) In the winter, the outdoor unit may stop after 5 - 10 minutes of operation. This is in order to protect the indoor unit heat exchanger from freezing and does not indicate a problem.

(4) Disconnect the manifold gauge and the inter-unit tubes,

and attach the caps and flare nuts. At this point, pumpdown is completed. (If the caps and flare nuts are not reattached, there is the danger of gas leakage.) (Refer to Fig. 24.)

If pump-down is not possible

If the Air Conditioner cannot be operated because of a malfunction or other cause, use a refrigerant recovery device to recover the refrigerant.

In order to protect the earth’s environment, be sure to perform pump-down to recover refrigerant

gas without releasing it into the atmosphere.

Fig. 22

(11) Replace the flare nut on the wide tube service port and fasten the flare nut securely with an adjustable wrench or

box wrench. Next, mount the valve cap and tighten it with a torque wrench (the cap needs to be tightened with the torque of 20 N·m (200 kgf · cm)). This process is very important to prevent gas from leaking from the system.

(12) Test run the air conditioner. (See page 23.)

(13) While the air conditioner is running, apply liquid soap to check for any gas leaks around the service valves or caps.

(14) If there is no leakage, stop the air conditioner.

(15) Wipe off the soap on the tubing.

This completes air purging with a vacuum pump and the air conditioner is ready for actual operation.

Fig. 23

Fig. 24

Cap

Narrow tube side

Charging port

Wide tube side

Close

D

Close

C

Close

B

Close

A

D

C

B

A

Manifold gauge

After disconnecting the inter-unit tubes, attach the flare nuts with flare bonnets.

19

English

5. Wiring Instructions

5-1. General Precautions on Wiring

(1) Before wiring, confirm the rated voltage of the unit as

shown on its nameplate, then carry out the wiring closely following the wiring diagram.

(2) Provide a power outlet to be used exclusively for each

unit, with a power supply disconnect and circuit breaker for overcurrent protection provided in the exclusive line.

(3) To prevent possible hazard due to insulation failure,

the unit must be grounded.

(4) Each wiring connection must be done tightly and in

accordance with the wiring system diagram. Wrong wiring may cause the unit to misoperate or become damaged.

(5) Do not allow wiring to touch the refrigerant tubing,

compressor, or any moving parts of the fan.

(6) Unauthorized changes in the internal wiring can be

very dangerous. The manufacturer will accept no responsibility for any damage or misoperation that occurs as a result of such unauthorized changes.

5-2. Recommended Wire Length and Diameter

Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Carefully observe these regulations when carrying out the installation. Table 6 shows maximum wire lengths for control line and power line and fuse or circuit capacity.

Refer to the wiring system diagram (Fig. 25a or 25b) for the meaning of (A), (B), and (C) in Table 6.

Table 6

NOTE

Cross-Sectional Area (mm

Model 3.5 1.0

GRF148 26 25 20 A

GRF198 26 25 20 A

GRF248 26 25 20 A

GRF318 26 30 20 A

Max. Power Line Length (m)

2

)

(A)

Max. Control Line Length (m)

(B) (C)

Fuse

or

Circuit Capacity

20

English

WARNING

G Be sure to comply with local codes on running

the wire from the indoor unit to the outdoor unit (size of wire and wiring method, etc.).

G Each wire must be firmly connected. G No wire should be allowed to touch refrigerant

tubing, the compressor, or any moving part.

G Be sure to connect power wires correctly

matching up numbers on terminals of the outdoor unit and respective indoor units A – D.

CAUTION

G Be sure to connect the power supply line to the outdoor unit as shown in the wiring diagram. The indoor

unit draws its power from the outdoor unit.

G Do not run wiring for antenna, signal, or power lines of television, radio, stereo, telephone, security sys-

tem, or intercom any closer than 1 meter from the power cable and wires between the indoor and outdoor units. Electrical noise may affect the operation.

G To avoid the risk of electric shock, each air

conditioner unit must be grounded.

G For the installation of a grounding device,

please observe local electrical codes.

G Grounding is necessary, especially for units

using inverter circuits, in order to release charged electricity and electrical noise caused by high tension. Otherwise, electrical shock may occur.

G Place a dedicated ground more than 2 meters

away from other grounds and do not have it shared with other electric appliances.

WARNING

Fig. 25a

4 indoor units with GRF248, GRF318

5-3. Wiring System Diagram

Fig. 25b

2 indoor units with GRF148, GRF198

1

A

B

2

3

Te r mi nal

4

INDOOR UNIT

1 2

3

Te r mi nal

4

INDOOR UNIT

Single-phase 220-240VAC 50Hz

(B)

(C)

Grounding line

(B)

(C)

Grounding line

Power supply

220VAC 60Hz

Grounding line

OUTDOOR UNIT

Te r mi nal(8P

(B)

(A)

1 2

3

4 5

6

7

8

)

UNIT A

UNIT B

(B)

(C)

Grounding line

(B)

Grounding line

(B)

Grounding line

OUTDOOR UNIT

Te r mi nal(12P

1 2

3

(B)

(C)

(B)

(C)

(B)

(C)

(B)

4 5

6

7

8

9

10 11

12

Te r mi nal

(3P)

A

INDOOR UNIT

B

INDOOR UNIT

C

INDOOR UNIT

D

INDOOR UNIT

1 2

3

Te r mi nal

4

1 2

3

Te r mi nalTe r mi nal

4

1 2

3

4

1 2

3

Te r mi nal

4

)

UNIT A

UNIT B

UNIT C

UNIT D

1 2

3

220VAC 60Hz

Power supply

Single-phase 220-240VAC 50Hz

L

N

Grounding line

(A)

21

English

When connecting each power wire to the corresponding terminal, follow the instructions “How to connect wiring to the terminal” and fasten the wire securely tight with the fixing screw of the terminal plate.

How to connect wiring to the terminal

a) For Indoor Unit

(1) Cut the wire end with a cutting pliers, then strip the

insulation to expose the wire about 7 mm. See the label (Fig. 26) near the terminal plate.

(2) Using a screwdriver, loosen the terminal screw on

the terminal plate.

(3) Insert the wire and tighten the terminal screw com-

pletely using a screwdriver.

b) For Outdoor Unit I For solid core wiring (or F-cable)

(1) Cut the wire end with a cutting pliers, then strip the

insulation to expose the solid wire about 25 mm. (Fig. 27)

(2) Using a screwdriver, remove the terminal screw(s)

on the terminal plate.

(3) Using the pliers, bend the solid wire to form a loop

suitable for the terminal screw.

(4) Shape the loop wire properly, place it on the termi-

nal plate and fix it securely with the removed terminal screw using a screwdriver.

I For stranded wiring

(1) Cut the wire end with a cutting pliers, then strip the

insulation to expose the stranded wiring about 10 mm and tightly twist the wire ends. (Figs. 28 and 29)

(2) Using a screwdriver, remove the terminal screw(s)

on the terminal plate.

(3) Using a ring connector fastener or pliers, securely

clamp each stripped wire end with a ring connector. (Fig. 28)

(4) Place the ring connector wire, and replace and

tighten the removed terminal screw using a screwdriver. (Fig. 30)

Fig. 27

Fig. 26

Fig. 28

Fig. 30

Screw and special washer

Ring connector

Wire

WARNING

Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist. Therefore, be sure all wiring is tightly connected.

Fig. 29

5-4. How to Connect Wiring to the Terminal

STRIP SIZE

7 mm

(ACTUAL

SIZE)

Solid wire

25 mm

Insulation

Stranded wire

10 mm

Twist wire ends

Loop

Ring connector

Wire

Special washer

Screw

Ring connector

Te r mi nal plate

22

English

5-5. Wiring Instructions for the Outdoor Unit

G Be sure to correctly align inter-unit cables A, B, C and D.

G Use a dedicated Air Conditioner circuit for power. G To make connections to the outdoor unit, remove the

inspection panel and tubing panel.

G Do not bring the inter-unit cables or power cable into

contact with tubing or service valves.

G Use outdoor unit cable fasteners and fasten the

inter-unit cables at the location where the cables are double-sheathed.

G Arrange the wiring so that the inter-unit cables are

contained in the inspection panel and tubing panel, as shown in Fig. 31.

CAUTION

Fig. 31

Outdoor unit A

Te r mi nal board

Indoor unit A

A is the indoor unit with refrigerant tubing that is connected to service valve A (top) of the outdoor unit.

Indoor unit B

B is the indoor unit with refrigerant tubing that is connected to service valve B (top) of the outdoor unit.

Indoor unit C

C is the indoor unit with refrigerant tubing that is connected to service valve C (top) of the outdoor unit.

Indoor unit D

D is the indoor unit with refrigerant tubing that is connected to service valve D (top) of the outdoor unit.

3

2

1

3

2

1

3

2

1

3

2

1

Te r mi nal board

Inter-unit cables ø1.0 (not provided)

Label A

A

Te r mi nal board

Inter-unit cables ø1.0 (not provided)

Label B

B

Te r mi nal board

Inter-unit cables ø1.0 (not provided)

Label C

C

Te r mi nal board

Inter-unit cables

Label D

ø1.0 (not provided)

D

1 2 3

1 2 3 4 5 6 7 8 9 10 11 12

Power: Single-phase, 220/240VAC 50HZ

Power switch (not provided)

Ground Power cable (not provided) (ø3.5 mm: Less than 26 m)

Be sure to perform grounding.

Attach a ground wire to either the outdoor unit or indoor unit. If there is a grounding terminal inside the room, use the grounding screw inside the indoor unit.

Be sure to apply the provided labels to both ends of the inter-unit cables to prevent miswiring. The units will not function if the wiring connections are incorrect.

23

English

Regulations on wire size differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Make sure that the installation fully complies with all local and national regulations.

(1) Remove access panel “C”. (Fig. 32)

(2) Connect the inter-unit wiring and power line

according to the drawing on the panel side.

(3) Be sure to size each wire allowing approx. 10 cm

longer than the required length for wiring. Store excess wiring inside the cabinet.

(4) When connections are completed, check that all

connections are correct as shown in the wiring system diagram on panel side.

(5) Be sure to ground the unit according to your local

codes.

Fig. 32

Cabinet

Access panel “C”

6. Test Run

Performing a test run

G Refer to the test run procedures in the indoor unit

installation manual.

G Perform the test run separately for each connected

indoor unit. If 2 units are operated simultaneously, it is not possible to correctly check for errors in tubing and wiring.

G If the room temperature is 15°C or below, it may not

be possible to check for tubing errors with cooling operation. If this occurs, perform heating operation for each unit individually, and check that warm air is discharged from each unit. If there is cold air mixed in with the warm air, check the tubing connections again.

Checking tubing and wiring

Perform the test run and check that operation is normal. If there is an error in tubing or wiring, the refrigerant may flow to indoor unit B when indoor unit A is operated (for example).

G Stop operation immediately if there is an error in tub-

ing or wiring. Turn the power (breaker) to OFF, and check whether the inter-unit cables are connected incorrectly, or whether the narrow tubes A and B are connected in reverse. Correct the connections.

G If there is an error in tubing, pump-down must be

performed. Be sure to perform pump-down. After making corrections, again purge the air from the tubes.

CAUTION

24

English

7. Connecting a Home Automation device

The HA (white) 4P terminal is located on the indoor unit PCB. If a HA device will be used, connect it to this terminal. Also, refer to Section 9. ELECTRIC WIRING DIAGRAM in the outdoor unit installation manual.

8. Installation Check Sheet

The strength of the installation location is sufficient to support the Air Conditioner weight.

The indoor and outdoor units are installed level and vertically.

The power and voltage are as specified.

Inter-unit cables are securely fastened to the terminal board.

Inter-unit cables are securely fixed.

The power cord and inter-unit cables are not connected anywhere along their paths.

The ground wire is securely connected.

An air purge of the refrigerant circuit has been conducted.

A leak test of the tubing connections has been performed.

Thermal insulation has been applied to the tubing connections.

Drain connections are secure and water drains properly.

Putty has been used to close the hole in the wall.

All service valves are fully open.

Remote controller signals are being positively received.

25

English

9. Electric Wiring Diagram Diagramme de câblage électrique

MCAF78/98/128

MCAF188/248

Fig. 33a

Fig. 33b

Electric wiring diagram for 2-room multi outdoor unit (GRF148) Diagramme de câblage électrique pour unité extérieure multi 2 pièces (GRF148)

To prevent electric shock, do not inspect or repair until the Power Lamp on the P.C.Board is turned off.

WARNING

Indoor unit

Appareils intérieurs

Fig. 34a

Pour éviter une secousse électrique, ne pas contrôler ni réparer jusqu’à ce que le témoin d’alimentation sur la PCB soit éteint.

DANGER

TO OUTDOOR UNIT

123

TERMINAL BASE

BLK

WHT

YEL/GRN

EVAPORATOR

RED

4

IND LAMP ASSY

123456789 123456789

RED

WHT

123456789 123456789

)

WHT

LAMP

10P(

AC1 AC2 SI

FLAP

5P(WHT) 12345 12345

YEL

BLU

PNK

RED

BRN

12345 12345

CONNECTOR

FLAP

WHT

RED BLK

1 2 3 4

BLK

4 4

)

WHT 4P(

ROOM/COIL

DCM

6P(BLU)

BLK

WHT

FM

COIL THERMISTOR

YEL

6 6

BLU

FAN MOTOR

123 123

WHT

123 123

ION ASSY

BLK

RED

CONNECTOR

BLK

)

WHT

3P(

3

WHT

HA

JEM-A

ION

TERMINAL

4P(

1 2 4

ION

10 10

WHT

10 10

CONTROLLER

ROOM THERMISTOR

BLK

123 123

12345 12345

RED

WHT

FLAP MOTOR

8FA-2-5257-72600-1

TO OUTDOOR UNIT

123

TERMINAL BASE

BLK

WHT

YEL/GRN

EVAPORATOR

RED

4

IND LAMP ASSY

123456789 123456789

RED

WHT

123456789 123456789

AC1 AC2 SI

CONNECTOR

BLU

1

BLK

DEF0DEF1

1 2 3 4 5 1 2 3 4 5

(5P) CONNECTOR

1 2 3 4 5 1 2 3 4 5

MAGNETIC COIL

COIL

4WAY VALVE

2 1 2

WHT

(2P) CONNECTOR

w w

MV1

YEL

RED

ORG

YEL

RED

ORG

MV1

REACTANCE

RV

BLU

2 1

1

2

WHT

(2P) CONNECTOR

BLK

w w w w w w

RV0RV1

BLK

GRY

BLU

BLK

GRY

WHT

1

WHT

GRN/YEL

L1 E

E-1E-2L2

MV0

2 3 4 5

1

BLK

YEL

RED

ORG

1 2 3 4 5 1 2 3 4 5

BLK

YEL

(5P) CONNECTOR

RED

ORG

1 2 3 4 5 1 2 3 4 5

MV0

MAGNETIC COIL

GRN/YEL

25A

GRY

RED

GRY

GRN/YEL

S1-A

S1-B

COMPRESSOR

(OLR)

OVERLOAD RELAY

COMPRESSOR

MOTOR

C

CM

R

S

GRN/YEL

COIL

THERMISTOR

1 1

WHT

(4P) CONNECTOR

BLK

THERMISTOR

WHT

1

2

(2P) CONNECTOR

RED

1

WHT

2

WHT

(2P) CONNECTOR

RED(PNK) RED(PNK)

(3P) CONNECTOR

FERRITE

CORE

BLK BLK

WHT WHT

121 2

3 3

WHT

1 2 3 4

COIL/OUTDOOR

1

COMP

2

w

OLR0

w

OLR1

WHTWHT

BLUBLU

YEL

2 2

YEL

BLK

3 4

4

3

BLK

UVW w

OUTDOOR

THERMISTOR

AW THERMISTOR

YEL

1 1

RED

(4P) CONNECTOR

YEL

1 2 3 4

A-TH B-TH

ww

COIL

DEFROST VALVE

DEF

BW THERMISTOR

1 2 1

BLU

1 2 3 4

YEL

BN THERMISTOR

YEL

2 1 2

BLK

4

(2P) CONNECTOR

YEL

w w

3 4

2

3

YEL

AN THERMISTOR

YEL

2

3 4

2

4

3

(4P) CONNECTOR

YEL

CONTROLLER

CN04 DCFM

2 3 4 5 6 7 1 2 3 4 5

1

BLK

YEL

BLU

RED

WHT

1 2123 4

5 6567

3 4

7

WHT

BLK

YEL

BLU

RED

(7P) CONNECTOR

WHT

FM

FAN MOTOR

WHT

)

WHT

LAMP

10P(

FLAP

5P(WHT) 12345 12345

BLU

PNK

RED

BRN

12345 12345

FLAP

ACIN1

w

ACIN2

w

REACTANCE

WHT

YEL

WHT

WHT RED

BLK

123 123

FAN MOTOR

BLK

)

ION

WHT

HA

WHT

JEM-A

4P(

3P(

E

GRN/YEL

10 10

BLK

CONTROLLER

ROOM THERMISTOR

123 123

)

WHT 4P(

ROOM/COIL

12345 12345

RED

DCM

BLK

4 4

FM

COIL THERMISTOR

6P(BLU)

YEL

WHT

6 6

BLU

WHT

10 10

FLAP MOTOR

1 2 3 4

3

1 2 4

1 2 3 4

ION ASSY

ION

TERMINAL

8FA-2-5257-68200-0

BLK

WHT

TERMINAL

BLK

WHT

PLATE

1 2

3

4 5 6 7

8

LN

GND

UNIT

A INDOOR

UNIT

B INDOOR

POWER

SUPPLY

TO INDOOR UNIT

RED

BLU

BLK

8FA-2-5257-56900-2

Meaning of Abbreviations

ABBREV.

1

BLK

2

BLU

3

BRN

4

GRN/YEL

5

GRY ORG

6 7

PNK

8

RED

9

VLT

10

WHT

11

YEL

MEANING

BLACK BLUE BROWN GREEN/YELLOW GREY ORANGE PINK RED VIOLET WHITE YELLOW

Signification des abréviations

ABREV.

1 2

3

4 5 6 7

8

9 10 11

BLK BLU BRN GRN/YEL GRY ORG PNK RED VLT WHT YEL

NOIR BLEU MARRON VERT/JAUNE GRIS ORANGE ROSE ROUGE VIOLET BLANC JAUNE

SIGNIFICATION

26

English

Fig. 34b

Fig. 34c

WHT

L2 L1

WHT

(

2P

)

CONNECTOR

21

REACTANCE

WW

HEATER1 HEATER0

CRANKCASE HEATER

COIL

THERMISTOR

COMP

COIL/OUTDOOR A-TH B-TH

COMPRESSOR

THERMISTOR

OUTDOOR

THERMISTOR

AW THERMISTOR

WW

DEF1 DEF0WWRV1 RV0

DEF

COIL

DEFROST VALVE

21

RV

COIL

4WAY VA LVE

AN THERMISTOR

BN THERMISTOR

BW THERMISTOR

BLK

(

2P

)

CONNECTOR

WHT

(

2P

)

CONNECTOR

11 22

(2P)

CONNECTOR

WHT

21

YEL

BLK

BLU

BLK

BLU

WHT

YEL

BLK

1234

11 22

WW

E-2

W

GRN/YEL

ACIN1

W

BLK

WHT

RED

25A

ACIN2

W

S1-A

S1-B

BLU

1 2 3 4 5 6 7 8 9

11 12

GND

POWER

SUPPLY

B INDOOR

UNIT

C INDOOR

UNIT

A INDOOR

UNIT

TO INDOOR UNIT

CONTROLLER

WHT WHT

WHT WHT (2P)

CONNECTOR

RED

(

3P

)

CONNECTOR

U V W

CNO4 DCFM

123

FERRITE

CORE

WHT

BLU

WHT

BLU

RED(PNK)

CM

GRN/YEL

COMPRESSOR

MOTOR

FM

1234

567

1234567

RED

BLU

BRN

WHT

ORG

RED

BLU

BRN

WHT

ORG

1234 123455

1234

123455

RED

ORG

MV1

MAGNETIC COIL

MV1

MAGNETIC COIL

MV0 1234 123455

1234

123455

RED

ORG

MV0

NL

OVERLOAD RELAY

(OLR)

FAN MOTOR

S/U C/W

R / V

W

GRN/YEL

E

W

GRN/YEL

GND

TERMINAL

PLATE

BLK

WHT

BLK WHT

REACTANCE

BLK

BRN

WHT FERRITE

CORE

22 11

OLR0 OLR1

RED

WHT

BLU

RED

8

BLU

BLK

WHT

CNO3

KS23

21 34567

1234

567

CNO2

KS22

213456

1234

12345656

RED

WHT

BLU

BLK

WHT

RED

BLU

BLK

WHT

1234

CNO1

KS10

2134

W

SICOM2

SI-C

W

SI-D

W

RED

ORG

1234

123455

MV2

MAGNETIC COIL

1234 123455

MV2

RED

ORG

1234

123455

MV3

MAGNETIC COIL

1234 12 455

MV3 1234 1234

C-TH

YEL

CW THERMISTOR

CN THERMISTOR

W

1 2 3

10

D INDOOR

UNIT

GRY

1234 1234

D-TH

YEL

DW THERMISTOR

DN THERMISTOR

3

E-1

RED(PNK)

BLK

YEL

GRY

BLK

YEL

GRY

BLK

YEL

GRY

BLK

YEL

GRY

8FA-2-5257-89000-0

FERRITE

CORE

(

7P

)

CONNECTOR

WHT

Fig. 34d

Electric wiring diagram for 4-room multi outdoor unit (GRF318) Diagramme de câblage électrique pour unité extérieure multi 4 pièces (GRF318)

Electric wiring diagram for 4-room multi outdoor unit (GRF248) Diagramme de câblage électrique pour unité extérieure multi 4 pièces (GRF248)

Electric wiring diagram for 2-room multi outdoor unit (GRF198) Diagramme de câblage électrique pour unité extérieure multi 2 pièces (GRF198)

COIL

BRN

567 567

BRN

4WAY VALVE

2P-CONNECTOR

WHT

ORG

WHT

ORG

RV

BLU

21 21

WHT

BLK

MAGNETIC COIL

REACTANCE

MV1 123 4 123 455

ORG

RED

123 455 123 4

MV1

WHT

21 21

WHT

2P-CONNECTOR

WHT

WW

L2 L1

BLK

YEL

WHT

E-2

123 4 123 455

GRY

123 455 123 4

MAGNETIC COIL

GRN/YEL

W

ORG

GRN/YEL

W

BLK

E

E-1

ACIN1

W

WHT

25A

ACIN2

FERRITE

CORE

W

S1-A

RED

W

S1-B

GRY

REACTANCE

BLU

BLK

MV0

BLK

YEL

RED

MV0

TERMINAL

PLATE

1 2

UNIT

3

A INDOOR

BLK

4

WHT

5

UNIT

TO INDOOR UNIT

6

B INDOOR

7

WHT

8

NL

POWER

SUPPLY

GND

8FA-2-5257-84200-0

OVERLOAD RELAY

(OLR)

COMPRESSOR

THERMISTOR

RED 11

WHT WHT

22

2P-CONNECTOR

OUTDOOR

THERMISTOR

COIL

THERMISTOR

YEL

BLK

123 4

BLK

123 4

COIL/OUTDOOR A-TH B-TH

11 22

COMP

W

OLR0

WHT WHT

W

OLR1

W

WUWVW

)

PNK (

BLU

WHT

RED

CORE

FERRITE 123 123

WHT

)

3P-CONNECTOR

PNK (

BLU

WHT

RED R

/

V

S/U C/W

GRN/YEL

CM

COMPRESSOR

MOTOR

AW THERMISTOR

YEL

123 4 123 4

HEATER CRANKCASE

WHT

2P-CONNECTOR

DEFROST VALVE

DEF

BLU

21

BLK

BW THERMISTOR

YEL

123 4 123 4

BN THERMISTOR

YEL

21

2P-CONNECTOR

BLK

WW

DEF1 DEF0WWRV1 RV0

AN THERMISTOR

YEL

CONTROLLER

HEATER1

HEATER0

WW

WHT

22 11

WHT

DCFMCN04

123 4567

BLU

RED

123 4 123 4

BLU

RED

WHT

FM

FAN M OTOR

3

BLU

BLK

YEL

4WAY VALVE

2P-CONNECTOR

WHT

BLK

GRY

MAGNETIC COIL

2P-CONNECTOR

COIL

WHT

RV

BLU

WHT

21 21

WHT

CRANKCASE

BLK

HEATER

SICOM2

KS10

W

21 3 4

BLK

BLU

WHT

RED

123 4 123 4

W

CNO1

SICOM2

SI-D

SI-C

MV2

W

123 4 123 455

BLK

YEL

ORG

RED

GRY

123 455 123 4

MV2

11 22

WHT

WW

HEATER1 HEATER0

123 4 123 455

ORG

123 455 123 4

MAGNETIC COIL

WHT

MV1

YEL

RED

MV1

REACTANCE

WHT

21 21

WHT

2P-CONNECTOR

WHT

WW

L2 L1

BLK

GRY

WHT

GRN/YEL

WHT

W

E-1

E-2

MV0 123 4 123 455

YEL

ORG

RED

123 455 123 4

MV0

MAGNETIC COIL

BRN

GRY

GRN/YEL

W

25A

BLK

GRY

W

E

S1-A

S1-B

GRN/YEL

W

ACIN1

W

ACIN2

W

REACTANCE

TERMINAL

BLK

WHT

FERRITE

CORE

RED

BLU

BLK

PLATE 1 2

NL

POWER

SUPPLY

3

GND

1

BLK

2

UNIT

3

A INDOOR

BLK

4 5

WHT

BLK WHT

WHT

UNIT

6

B INDOOR

7

TO INDOOR UNIT

8

UNIT

9

C INDOOR 10 11

UNIT

12

D INDOOR

GND

8FA-2-5257-57100-0

COIL

THERMISTOR

YEL

123 4

BLK

THERMISTOR

COMPRESSOR

123 4

COIL/OUTDOOR A-TH B-TH 11 22

COMP

W

OLR0

W

OLR1

W

U

W

V

W

CNO4 DCFM

123 4567

BLU

WHT

RED(PNK)

CORE

RED

123 123

WHT FERRITE

123 4 123 4

3P-CONNECTOR

BLU

WHT

RED(PNK)

RED

R

/

V

S/U C/W

CM

COMPRESSOR

MOTOR

GRN/YEL

OVERLOAD RELAY

RED

WHT

22

WHT

11

2P-CONNECTOR

YEL

BLK

BLU

567 567

BLU

FM

FAN M OTOR

(OLR)

OUTDOOR

THERMISTOR

WHT

ORG

BRN

WHT

ORG

BRN

AW THERMISTOR

123 4 123 4

YEL

123 4 123 4

DW THERMISTOR

AN THERMISTOR

YEL

KS23

21 3 4567

BLK

BLU

WHT

RED

CNO3

D-TH

YEL

BLK

567 567

BW THERMISTOR

DN THERMISTOR

YEL

123 4 123 4

WHT

RED

123 4 123 4

CW THERMISTOR

YEL

8

8 8

C-TH

YEL

BLU

YEL

DEFROST VALVE

BN THERMISTOR

21 3 456

BLK

123 45656 123 4

YEL

CN THERMISTOR

MAGNETIC COIL

COIL

DEF

BLU

21

BLK

21

2P-CONNECTOR

BLK

WW

DEF1 DEF0WWRV1 RV0

CONTROLLER

KS22

BLU

WHT

RED

CNO2

MV3 123 4 12 455

ORG

RED

123 455 123 4

MV3

Meaning of Abbreviations

ABBREV.

1 2

3

4 5 6 7

8

9 10 11

BLK BLU BRN GRN/YEL GRY ORG PNK RED VLT WHT YEL

BLACK BLUE BROWN GREEN/YELLOW GREY ORANGE PINK RED VIOLET WHITE YELLOW

Signification des abréviations

ABREV.

10 11

1

2

3

4

5

6

7

8

9

BLK BLU BRN GRN/YEL GRY ORG PNK RED VLT WHT YEL

NOIR BLEU MARRON VERT/JAUNE GRIS ORANGE ROSE ROUGE VIOLET BLANC JAUNE

MEANING

SIGNIFICATION

UNIT COMBINATION TABLESAPPENDIX B

Be sure to operate the air conditioning system only when 2 or more indoor units have been installed. If operated with only a single unit installed, the returning fluid to the compressor may cause a malfunction.

NOTE

<

List of Combination Table

>

Name of Combination Table

2-Room Outdoor Unit Combination Table

4-Room Outdoor Unit Combination Table

Model No. of Outdoor Unit

GRF148MR5I

GRF198MR5I

GRF248MR5I

GRF318MR5I

Remarks

OI-852-6-4181-053-00-0

OI-852-6-4181-054-00-0

OI-852-6-4181-055-00-0

OI-852-6-4181-056-00-0

A-2

2-Room Outdoor Unit Combination Table

GRF148MR5I

• Refer to the catalog for the combination indoor units.

• Store this table together with the operation manual supplied with the indoor unit.

The combinations of the indoor units listed in Table 1 on the next page are combinations solely of those units which can be operated concurrently. In addition to the combinations listed in the table, other combinations of indoor units are possible provided that the following conditions are satisfied.

Conditions:

1. At least two or more indoor units must be connected to the multi outdoor unit. It is not acceptable for only one indoor unit to be connected.

2. The total rated cooling capacity of the indoor units to be connected must be no more than 200% of the rated cooling capacity of the outdoor unit.

CAUTION

Example: When two indoor units are connected

If the following holds true

• Rated cooling capacity of GRF148MR5I outdoor unit: C=4 (kW)

• Rated cooling capacity of indoor units: K1, K2, ... (kW)

Then:

C x 2 (200%) K1 + K2 + .......

4 x 2 3.5 + 3.5 8 7

It is therefore possible to connect two units with respective capacities of 3.5 + 3.5. However, since this combination is not found in the 2-room operation column of Table 1, operating all these units concurrently may result in trouble. At a time like this, shut down at least one of the two indoor units to match one of the combinations found in the single-room operation column of Table 1.

NOTE

Be sure to operate the air conditioning system only when 2 or more indoor units have been installed. If operated with only a single unit installed, the returning fluid to the compressor may cause a malfunction.

In this case, all the indoor units installed must not be operated concurrently under any circumstances. Otherwise, the air conditioner may not run properly and trouble may occur.

Pub. OI-85264181053000

R.D. 28 Reyrieux BP 131-01601 Trévoux CEDEX France

Tel. (33) 04.74.00.92.92 - Fax (33) 04.74.00.42.00

http://www.technibel.com

(

)

< Combinations of operatable indoor units >

GRF148MR5I

(Rated cooling capacity: 4.0 kW)

Table 1

Single-room

Operation

2-room

Operation

Indoor Unit Combination

2.2 = 2.2 2.2 2.2

2.65 = 2.65 2.65 2.65(1.2 - 3.2

3.5 = 3.5 3.5 3.5(1.3 - 3.6

2.2 + 2.2 = 4.4 1.8 1.83.6(2.0 - 4.5

2.2 + 2.65 = 4.85 1.68 2.02 3.7(2.0 - 4.8)1.72 2.48 4.2(2.0 - 5.0

2.2 + 3.5 = 5.7 1.51 2.39 3.9(2.0 - 4.9)1.64 2.76 4.4(2.2 - 5.3

2.65 + 2.65 = 5.3 2 2 4.0(2.0 - 5.0)2.25 2.25 4.5(2.2 - 5.5

2.65 + 3.5 = 6.15 1.72 2.28 4.0(2.1 - 5.0)2.08 2.42 4.5(2.4 - 5.5

Room Room Room Room

AB

NOTE

2.2: MCAF78MR5I

2.65: MCAF98MR5I

3.5: MCAF128MR5I

Indoor Unit Capacity (kW)

Total Performance Total Performance

Capacity ( Min. - Max. )

1.2 - 2.6

AB

2.5 2.5(1.4 - 3.5

3.6 3.6(1.4 - 4.0

4.2 4.2(1.5 - 4.2

2.1 2.1 4.2(2.0 - 5.0

HEATING COOLING

Capacity ( Min. - Max. )

2-Room Outdoor Unit Combination Table

GRF198MR5I

• Refer to the catalog for the combination indoor units.

• Store this table together with the operation manual supplied with the indoor unit.

The combinations of the indoor units listed in Table 1 on the next page are combinations solely of those units which can be operated concurrently. In addition to the combinations listed in the table, other combinations of indoor units are possible provided that the following conditions are satisfied.

Conditions:

1. At least two or more indoor units must be connected to the multi outdoor unit. It is not acceptable for only one indoor unit to be connected.

2. The total rated cooling capacity of the indoor units to be connected must be no more than 200% of the rated cooling capacity of the outdoor unit.

CAUTION

Example: When two indoor units are connected

If the following holds true

• Rated cooling capacity of GRF198MR5I outdoor unit: C=5.6 (kW)

• Rated cooling capacity of indoor units: K1, K2, ... (kW)

Then:

C x 2 (200%) K1 + K2 + .......

5.6 x 2 5.15 + 5.15

11.2 10.3

It is therefore possible to connect two units with respective capacities of 5.15 + 5.15. However, since this combination is not found in the 2-room operation column of Table 1, operating all these units concurrently may result in trouble. At a time like this, shut down at least one of the two indoor units to match one of the combinations found in the single-room operation column of Table 1.

NOTE

Be sure to operate the air conditioning system only when 2 or more indoor units have been installed. If operated with only a single unit installed, the returning fluid to the compressor may cause a malfunction.

In this case, all the indoor units installed must not be operated concurrently under any circumstances. Otherwise, the air conditioner may not run properly and trouble may occur.

Pub. OI-85264181054000

R.D. 28 Reyrieux BP 131-01601 Trévoux CEDEX France

Tel. (33) 04.74.00.92.92 - Fax (33) 04.74.00.42.00

http://www.technibel.com

(

)

(

)

(

)

< Combinations of operatable indoor units >

GRF198MR5I

(Rated cooling capacity: 5.6 kW)

Table 1

Single-room

Operation

2-room

Operation

Indoor Unit Combination

2.2 = 2.2 2.2 2.2

2.65 = 2.65 2.65 2.65(1.4 - 3.2

3.5 = 3.5 3.5 3.5(1.5 - 3.6

5.15 = 5.15 5.15 5.15(1.6 - 5.8

2.2 + 2.2 = 4.4 2.2 2.2 4.4(2.0 - 5.1

2.2 + 2.65 = 4.85 2.2 2.65 4.85(2.0 - 5.8

2.2 + 3.5 = 5.7 1.97 3.13 5.1(2.0 - 6.7

2.2 + 5.15 = 7.35 1.65 3.85 5.5(2.1 - 6.8

2.65 + 2.65 = 5.3 2.50 2.50 5(2.0 - 6.3

2.65 + 3.5 = 6.15 2.24 2.96 5.2(2.1 - 6.8

2.65 + 5.15 = 7.8 1.93.7 5.6(2.1 - 6.8

3.5 + 3.5 = 7 2.7 2.7 5.4(2.0 - 6.8

3.5 + 5.15 = 8.65 2.27 3.33 5.6(2.1 - 6.8

Room Room Room Room

AB

NOTE

2.2: MCAF78MR5I

2.65: MCAF98MR5I

3.5: MCAF128MR5I

5.15: MCAF188R5I

COOLING HEATING

Total Performance Total Performance

Capacity ( Min. - Max. )

Indoor Unit Capacity (kW)

1.4 - 2.6

AB

2.5 2.5(1.8 -4.3

3.6 3.6(1.8 - 4.7

4.2 4.2(1.9 - 5.1

6.0 6.0

2.5 2.5 5.0

2.5 3.6 6.1(2.1 - 7.5

2.4 3.9 6.3(2.1 - 8.3

2.03 4.876.9(2.4 - 8.4

3.2 3.2 6.45(2.3 - 8.4

3.07 3.58 6.65(2.3 - 8.4

2.74 4.56 7.3(2.4 - 8.4

3.45 3.45 6.9(2.3 - 8.4

3.01 4.29 7.3(2.4 - 8.4

Capacity ( Min. - Max. )

2- 7.8 2 - 6.4

4-Room Outdoor Unit Combination Table

GRF248MR5I

• Refer to the catalog for the combination indoor units.

• Store this table together with the operation manual supplied with the indoor unit.

The combinations of the indoor units listed in Table 1 on the next page are combinations solely of those units which can be operated concurrently. In addition to the combinations listed in the table, other combinations of indoor units are possible provided that the following conditions are satisfied.

Conditions:

1. At least two or more indoor units must be connected to the multi outdoor unit. It is not acceptable for only one indoor unit to be connected.

2. The total rated cooling capacity of the indoor units to be connected must be no more than 200% of the rated cooling capacity of the outdoor unit.

CAUTION

Example: When four indoor units are connected

If the following holds true

• Rated cooling capacity of GRF248MR5I outdoor unit: C=6.8 (kW)

• Rated cooling capacity of indoor units: K1, K2, ... (kW)

Then:

C x 2 (200%) K1 + K2 + .......

6.8 x 2 2.2 + 2.2 + 2.2 + 5.15

13.6 11.75

It is therefore possible to connect four units with respective capacities of 2.2 + 2.2 + 2.2 + 5.15. However, since this combination is not found in the 4-room operation column of Table 1, operating all these units concurrently may result in trouble. At a time like this, shut down at least one of the four indoor units to match one of the combinations found in the 3-room operation column of Table 1.

NOTE

Be sure to operate the air conditioning system only when 2 or more indoor units have been installed. If operated with only a single unit installed, the returning fluid to the compressor may cause a malfunction.

In this case, all the indoor units installed must not be operated concurrently under any circumstances. Otherwise, the air conditioner may not run properly and trouble may occur.

Pub. OI-85264181055000

R.D. 28 Reyrieux BP 131-01601 Trévoux CEDEX France

Tel. (33) 04.74.00.92.92 - Fax (33) 04.74.00.42.00

http://www.technibel.com

.

(

)

(

)

(

)

(

)

< Combinations of operatable indoor units >

GRF248MR5I

(Rated cooling capacity: 6.8 kW)

Table 1

Single-room

Operation

2-room

Operation

3-room

Operation

Indoor Unit Combination

2.2 = 2.2 2.2 2.2 ( 1.4 - 2.6 ) 2.5 2.5 ( 1.8 -4.3 )

2.65

3.5

5.15

7.1

2.2 + 2.2

2.2 + 2.65

2.2 + 3.5

2.2 + 5.15

2.2 + 7.1

2.65 + 2.65

2.65 + 3.5

2.65 + 5.15

2.65 + 7.1

3.5 + 3.5

3.5 + 5.15

3.5 + 7.1

5.15 + 5.15

2.2 + 2.2 + 2.2

2.2 + 2.2 + 2.65

2.2 + 2.2 + 3.5

2.2 + 2.2 + 5.15

2.2 + 2.65 + 2.65

2.2 + 2.65 + 3.5

2.2 + 2.65 + 5.15

2.2 + 3.5 + 3.5

2.2 + 3.5 + 5.15

2.65 + 2.65 + 2.65

2.65 + 2.65 + 3.5

2.65 + 2.65 + 5.15

2.65 + 3.5 + 3.5

2.65 + 3.5 + 5.15

3.5 + 3.5 + 3.5

3.5 + 3.5 + 5.15

Room Room Room Room Room Room Room Room

ABCDCapacity ( Min. - Max

=

2.65 2.65 2.65

=

3.5 3.5 3.5(1.5 - 3.6

=

5.15 5.15 5.15(1.6 - 5.8

=

7.1 6.8 6.8 ( 1.6 - 6.8 ) 8.0 8.0 ( 2 - 8.0 )

=

4.4 2.2 2.2 4.4

=

4.85 2.2 2.65 4.85(2.0 - 5.8

=

5.7 2.2 3.5 5.7(2.0 - 6.7

=

7.351.98 4.62 6.6(2.1 - 7.7

=

9.3 1.61 5.19 6.8(2.1 - 8.1

=

5.3 2.65 2.65 5.3(2.0 - 6.3

=

6.15 2.54 3.365.9(2.0 - 6.8

=

7.8 2.28 4.42 6.7(2.1 - 8.1

=

9.75 1.854.956.8(2.1 - 8.1

=

7 3.33.3 6.6(2.0 - 8.1

=

8.65 2.75 4.05 6.8(2.1 - 8.1

=

10.6 2.25 4.55 6.8(2.1 - 8.1

=

10.33.4 3.4 6.8 ( 2.1 - 8.1 ) 4.3 4.38.6 ( 2.4 - 9.0 )

=

6.6 2.2 2.2 2.2 6.5

=

7.05 2.06 2.06 2.48 6.6(2.9 - 8.1

=

7.9 1.88 1.88 2.99 6.75(2.9 - 8.1

=

9.55 1.57 1.57 3.67 6.8(2.9 - 8.1

=

7.5 1.97 2.4 2.4 6.7(2.9 - 8.1

=

8.35 1.79 2.16 2.856.8(2.9 - 8.1

=

10 1.5 1.83.5 6.8(2.9 - 8.1

=

9.2 1.63 2.59 2.59 6.8(2.9 - 8.1

=

10.9 1.38 2.193.23 6.8(2.9 - 8.1

=

7.95 2.27 2.27 2.27 6.8(2.9 - 8.1

=

8.8 2.05 2.05 2.7 6.8(2.9 - 8.1

=

10.5 1.72 1.72 3.356.8(2.9 - 8.1

=

9.65 1.87 2.47 2.47 6.8(2.9 - 8.1

=

11.3 1.59 2.11 3.1 6.8(2.9 - 8.1

=

10.5 2.27 2.27 2.27 6.8(2.9 - 8.1

=

12.2 1.961.962.88 6.8 (2.9 - 8.1 ) 2.51 2.51 3.588.6 ( 3.4 - 9.0 )

COOLING HEATING

Total Performance

Indoor Unit Capacity (kW)

)A BCDCapacity ( Min. - Max. )

1.4 - 3.2

2.0 - 5.1

2.5 - 7.7

3.6 3.6(1.8 - 4.7

4.2 4.2(1.9 - 5.1

6.0 6.0(2- 7.8

2.50 2.50 5.0(2 - 6.4

2.50 3.60 6.1(2.1 - 7.5

2.50 4.20 6.7(2.1 - 8.3

2.44 5.86 8.3(2.4 - 9.0

1.95 6.65 8.6(2.4 - 9.0

3.60 3.60 7.2(2.3 - 8.5

3.51 4.09 7.6(2.3 - 8.5

3.15 5.25 8.4(2.4 - 9.0

2.56 6.04 8.6(2.4 - 9.0

4.00 4.00 8.0(2.3 - 8.5

3.50 5.00 8.5(2.4 - 9.0

2.84 5.76 8.6(2.4 - 9.0

2.5 2.5 2.5 7.5(2.7 - 8.5

2.3 2.33.38

2.26 2.26 3.798.3(3.2 - 9.0

1.951.95 4.698.6(3.4 - 9.0

2.16 3.12 3.12 8.4(3.4 - 9.0

2.06 2.97 3.47 8.5(3.4 - 9.0

1.78 2.56 4.26 8.6(3.4 - 9.0

1.97 3.31 3.31 8.6(3.4 - 9.0

1.69 2.84 4.06 8.6(3.4 - 9.0

2.872.872.87 8.6(3.4 - 9.0

2.72 2.72 3.17 8.6(3.4 - 9.0

2.352.35 3.91 8.6(3.4 - 9.0

2.583.01 3.01 8.6(3.4 - 9.0

2.24 2.62 3.74 8.6(3.4 - 9.0

2.872.872.87 8.6(3.4 - 9.0

NOTE

2.2: MCAF78MR5I

2.65: MCAF98MR5I

3.5: MCAF128MR5I

5.15: MCAF188R5I

7.1: MCAF248R5I

Total Performance

3 - 9.0

IMPORTANT

4-room

Operation

(Concurrent operation of 4 indoor units prohibited)

This multi outdoor unit allows up to four indoor units to be connected. However, all four indoor units must not be operated concurrently. Otherwise, the air conditioner may not run properly. Up to three indoor units may be operated concurrently.

4-Room Outdoor Unit Combination Table

GRF318MR5I

• Refer to the catalog for the combination indoor units.

• Store this table together with the operation manual supplied with the indoor unit.

The combinations of the indoor units listed in Table 1 on the next page are combinations solely of those units which can be operated concurrently. In addition to the combinations listed in the table, other combinations of indoor units are possible provided that the following conditions are satisfied.

Conditions:

1. At least two or more indoor units must be connected to the multi outdoor unit. It is not acceptable for only one indoor unit to be connected.

2. The total rated cooling capacity of the indoor units to be connected must be no more than 200% of the rated cooling capacity of the outdoor unit.

CAUTION

Example: When four indoor units are connected

If the following holds true

• Rated cooling capacity of GRF318MR5I outdoor unit: C=8 (kW)

• Rated cooling capacity of indoor units: K1, K2, ... (kW)

Then:

C x 2 (200%) K1 + K2 + .......

8 x 2 2.2 + 2.2 + 3.5 + 7.1 16 15

It is therefore possible to connect four units with respective capacities of 2.2 + 2.2 + 3.5 + 7.1. However, since this combination is not found in the 4-room operation column of Table 1, operating all these units concurrently may result in trouble. At a time like this, shut down at least one of the four indoor units to match one of the combinations found in the 3-room operation column of Table 1.

NOTE

Be sure to operate the air conditioning system only when 2 or more indoor units have been installed. If operated with only a single unit installed, the returning fluid to the compressor may cause a malfunction.

In this case, all the indoor units installed must not be operated concurrently under any circumstances. Otherwise, the air conditioner may not run properly and trouble may occur.

Pub. OI-85264181056000

R.D. 28 Reyrieux BP 131-01601 Trévoux CEDEX France

Tel. (33) 04.74.00.92.92 - Fax (33) 04.74.00.42.00

http://www.technibel.com

Technibel GRF148MR5I, GRF198MR5I, GRF248MR5I, GRF318MR5I Technical & Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual