Technibel GRF246R5IAA UnitÃ©s extÃ©rieures monosplit air-air Service Manual

TECHNICAL &

SERVICE MANUAL

MCAF188R5I + GRF186R5I


FILE NO.

Destination: Europe

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Indoor Model No.

MCAF188R5I

MCAF248R5I

Product Code No.

MCAF188R5IAA (1 852 349 61)

MCAF248R5IAA (1 852 349 62)

Outdoor Model No.

GRF186R5I

GRF246R5I

Product Code No.

GRF186R5IAA (1 852 338 71)

GRF246R5IAA (1 852 338 72)

Indoor Unit Outdoor Unit

MCAF188R5I

MCAF248R5I

AIR CONDITIONER

GRF186R5I

GRF246R5I

RoHS

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

WARNING

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

• You are requested to use lead-free solder.

F-GAS REGULATION (EC) No 842 / 2006

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

REFERENCE NO.

SM 700742

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.

WARNING

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

CAUTION

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

WARNING

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 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

• 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

CAUTION

• 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

1. OPERATING RANGE

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

Page

5

2. SPECIFICATIONS

2-1.

Unit Specifications .............................................................................................................

2-2.

Major Component Specifications

2-3.

Other Component Specifications

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

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

6

8

12

3. DIMENSIONAL DATA

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

13

4. REFRIGERANT FLOW DIAGRAM

4-1.

Refrigerant Flow Diagram ...................................................................................................

16

5. PERFORMANCE DATA

5-1.

Temperature Charts ............................................................................................................

5-2.

Air Throw Distance Charts .................................................................................................

17

19

6. ELECTRICAL DATA

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

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

21

22

7. INSTALLATION INSTRUCTIONS

7-1.

Installation Site Selection ...................................................................................................

7-2.

Recommended Wire Length and Diameter

7-3.

Remote Control Unit Installation Position

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

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

7-4.

How to Test Run the Air Conditioner ...................................................................................

7-5. Remove the Grille to Install the Indoor Unit ........................................................................

24

26

27

28

29

8. MAINTENANCE

8-1.

Address Setting of the Remote Control Unit .......................................................................

8-2.

Disconnecting and Connecting Positive Connector for Outdoor Unit .................................

30

31

9. FUNCTIONS

9-1.

Operation Functions

9-2.

Protective Functions

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

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

32

34

3

10. TROUBLESHOOTING

10-1. Precautions before Performing Inspection or Repair ...........................................................

10-2. Method of Self-Diagnostics .................................................................................................

10-3. Checking the Indoor and Outdoor Units ..............................................................................

10-4. Trouble Diagnosis of Fan Motor ...........................................................................................

10-5. Noise Malfunction and Electromagnetic Interference ..........................................................

Page

36

36

38

42

44

11. CHECKING ELECTRICAL COMPONENTS

11-1. Measurement of Insulation Resistance ...............................................................................

11-2. Checking Continuity of Fuse on PCB Ass'y .........................................................................

45

46

12. REFRIGERANT R410A:

SPECIAL PRECAUTIONS WHEN SERVICING UNIT

12-1. Characteristics of New Refrigerant R410A .........................................................................

12-2. Checklist before Servicing ...................................................................................................

12-3. Tools Specifically for R410A ................................................................................................

12-4. Tubing Installation Procedures ............................................................................................

12-5. In Case of Compressor Malfunction ....................................................................................

12-6. In Case Refrigerant is Leaking ............................................................................................

12-7. Charging Additional Refrigerant ..........................................................................................

12-8. Retro-Fitting Existing Systems ............................................................................................

49

50

52

53

53

47

47

49

APPENDIX INSTRUCTION MANUAL

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

54

4

1. OPERATING RANGE

Cooling

Heating

Temperature

Maximum

Minimum

Maximum

Minimum

Indoor Air Intake Temp.

32

°

C D.B. / 23

°

C W.B.

19

°

C D.B. / 14

°

C W.B.

27

°

C D.B.

16

°

C D.B.

Outdoor Air Intake Temp.

43

°

C D.B.

-15

°

C D.B.

24

°

C D.B. / 18

°

C W.B.

_ D.B. / -15 °

C W.B.

5

2. SPECIFICATIONS

2-1. Unit Specifications

Indoor Unit MCAF188R5I

Outdoor Unit GRF186R5I

Power Source 220 to 240V Single-Phase 50Hz

Voltage Rating

Performance

Capacity

Air Circulation (High)

Moisture Removal (High) kW

BTU/h m 3 /h

Liters/h

Electrical Rating

Available Voltage Range

Running Amperes

Power Input

Power Factor

E.E.R.

C.O.P.

Compressor Locked Rotor Amperes

Features

Controls / Temperature Control

Control Unit

Timer

Fan Speeds

Airflow Direction (Indoor)

Air Filter

Compressor

Refrigerant / Amount charged at shipment

Indoor / Outdoor

Horizontal

Vertical kg

Refrigerant Control

Operation Sound Indoor : Hi/Me/Lo/Qt*

(*Qt = Quiet mode) Outdoor : Hi

Refrigerant Tubing Connections

Max. allowable tubing length at shipment

Refrigerant Narrow tube dB-A dB-A m mm (in.)

Tube Diameter Wide tube

Refrigerant Tube Kit / Accessories mm (in.)

W/W

W/W

A

W

%

V

A

Dimensions & Weight

Unit Dimensions

Package Dimensions

Weight

Height

Width

Depth

Height

Width

Depth

Net

Shipping

Shipping Volume mm mm mm mm mm mm kg kg m 3

230V

5.15

17,600

Cooling

( 1.2 to 5.5 )

( 4,100 to 18,800 )

890

2.3

Heating

6.0

20,500

( 1.3 to 6.4 )

( 4,400 to 21,800 )

920

-

7.0

1,500

Cooling

( 1.2 to 8.4 )

( 250 to 1,800 )

198 to 264

7.4

1,575

93

3.43

-

17.5

Heating

( 1.3 to 9.0 )

( 270 to 1,930 )

93

-

3.81

17.5

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

24-Hour ON or OFF Timer, 1Hour OFF Timer

Auto and 3 steps / Auto (Hi, Me, Lo)

Manual

Auto

Washable, Anti-Mold

DC Twin Rotary (Inverter)

R410A / 1.3

Electric Expansion Valve

42 / 38 / 30 / 28

51

41 / 38 / 30 /28

52

Flare Type

10

6.35 (1/4)

Indoor Unit

298

1,065

218

289

1,140

379

12.0

15.0

0.12

12.7 (1/2)

Optional / Air Clean Filter

Outdoor Unit

670

880

285

743

1,011

379

44.0

48.0

0.28

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Remarks: Rating conditions are:

Cooling: Indoor air temperature 27 ° C D.B. / 19 ° C W.B.

Outdoor air temperature 35 ° C D.B. / 24 ° C W.B.

Heating: Indoor air temperature 20 ° C D.B.


6



Power Source 220 to 240V Single-Phase 50Hz

Voltage Rating

Performance

Capacity

Air Circulation (High)

Moisture Removal (High) kW

BTU/h m 3 /h

Liters/h

Electrical Rating

Available Voltage Range

Running Amperes

Power Input

Power Factor

E.E.R.

C.O.P.

Compressor Locked Rotor Amperes

Features

Controls / Temperature Control

Control Unit

Timer

Fan Speeds

Airflow Direction (Indoor)

Air Filter

Compressor

Refrigerant / Amount charged at shipment

Indoor / Outdoor

Horizontal

Vertical kg

Refrigerant Control

Operation Sound Indoor : Hi/Me/Lo/Qt*

(*Qt = Quiet mode) Outdoor : Hi

Refrigerant Tubing Connections

Max. allowable tubing length at shipment

Refrigerant Narrow tube dB-A dB-A m mm (in.)

Tube Diameter Wide tube

Refrigerant Tube Kit / Accessories mm (in.)

W/W

W/W

A

W

%

V

A

Dimensions & Weight

Unit Dimensions

Package Dimensions

Weight

Height

Width

Depth

Height

Width

Depth

Net

Shipping

Shipping Volume mm mm mm mm mm mm kg kg m 3

230V

7.1

24,200

Cooling

( 1.2 to 8.0 )

( 4,100 to 27,300 )

1,020

2.3

Heating

8.5

29,000

( 1.3 to 9.5 )

( 4,400 to 32,400 )

1,110

-

10.7

2,355

Cooling

( 1.2 to 13.6 )

( 280 to 2,845 )

198 to 264

11.3

2,490

96

3.01

-

17.5

Heating

( 1.3 to 15.1 )

( 290 to 3,150 )

96

-

3.41

17.5

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

24-Hour ON or OFF Timer, 1Hour OFF Timer

Auto and 3 steps / Auto (Hi, Me, Lo)

Manual

Auto

Washable, Anti-Mold

DC Twin Rotary (Inverter)

R410A / 1.95

Electric Expansion Valve

47 / 44 / 41 / 30

55

46 / 43 / 40 /30

56

Flare Type

10

6.35 (1/4)

Indoor Unit

298

1,065

218

289

1,140

379

12.0

15.0

0.12

15.88 (5/8)

Optional / Air Clean Filter

Outdoor Unit

740

900

320

868

1,050

423

59.0

63.0

0.38


Remarks: Rating conditions are:





7

2-2. Major Component Specifications

2-2-1. Indoor Unit


Control PCB

Part No.

Controls

Control Circuit Fuse

Remote Control Unit

Fan

Type

Q'ty ... Dia. and Length

Fan Motor

Type

Model ... Q'ty

No. of Poles

Rough Measure RPM (Cool / Heat)

Nominal Output

Coil Resistance

(Ambient Temp. 20 ° C)

Safety Device

Type

Over-Current Protection

Over-Heat Protection

Run Capacitor

Flap Motor

Type

Model

Rating

Coil Resistance


Heat Exchanger Coil

Coil

Rows

Fin Pitch

Face Area mm

W

Ohm

Micro F

VAC

Ohm mm m 2

CB-KRV184EH

Microprocessor

250V 3.15A

RCS-4MHVPINW4E

Cross-Flow

1 ... D94 / L845

DC Motor

SIC-39CVL-D847-2-A ... 1

8

1,250 / 1,300

30

-

Internal Controller

Yes

Yes

-

-

Stepping Motor

MP24Z3

DC 12V

Each Pair of Terminal : 400 +/- 7%

Aluminum Plate Fin / Copper Tube

2

1.3

0.285


8


Control PCB

Part No.

Controls



Fan

Type

Q'ty ... Dia. and Length

Fan Motor

Type

Model ... Q'ty

No. of Poles


Nominal Output

Coil Resistance


Safety Device

Type



Run Capacitor

Flap Motor

Type

Model

Rating

Coil Resistance



Coil

Rows

Fin Pitch

Face Area mm

W

Ohm

Micro F

VAC

Ohm mm m 2

CB-KRV244EH

Microprocessor

250V 3.15A

RCS-4MHVPINW4E

Cross-Flow

1 ... D94 / L845

DC Motor

SIC-39CVL-D847-2-A ... 1

8

1,500 / 1,550

30

-

Internal Controller

Yes

Yes

-

-

Stepping Motor

MP24Z3

DC 12V

Each Pair of Terminal : 400 +/- 7%


2

1.3

0.285


9

2-2-2. Outdoor Unit


Control PCB

Compressor

Type

Compressor Model / Nominal Output

Compressor Oil ... Amount

Coil Resistance (Ambient Temp. 20 ° C)

CC

Ohm

Safety Device

CT (Peak current cut-off control)

Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Overload Relay Model

Run Capacitor

Operating Temp.

Micro F

VAC

Crankcase Heater

Fan

Type

Q'ty ... Dia.

Fan Motor

Type

Model ... Q'ty

No. of Poles


Nominal Output

Coil Resistance

(Ambient Temp. 20

°

C) mm

W

Ohm

Safety Device

Run Capacitor

Type



Micro F

VAC


Coil

Rows

Fin Pitch

Face Area

External Finish mm m 2

CB-CRV184EH

Microprocessor

250V 25A

DC Twin Rotary (Hermetic)

C-6RVN93H0M / 1,050W

FV50S ... 350

R - S : 0.482

S - T : 0.482

T - R : 0.482

Yes

Yes

Yes

CS-7L115

Open : 115

°

C, Close : 95

°

C

-

-

-

Propeller

1 ... D420

DC Motor

DAJ12-55J71A-CR ... 1

8

820 / 850

50

BRN - WHT : 77.5

WHT - BLU : 77.5

BLU - RED : 77.5

Internal Controller

Yes

Yes

-

-


2

1.2

0.510

Acrylic baked-on enamel finish


10


Control PCB

Part No.

Controls


Compressor

Type

Compressor Model / Nominal Output

Compressor Oil ... Amount

Coil Resistance (Ambient Temp. 25 ° C)

CC

Ohm

Safety Device

CT (Peak current cut-off control)

Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Overload Relay Model

Operating Temp.

Run Capacitor Micro F

VAC

Crankcase Heater

Fan

Type

Q'ty ... Dia.

Fan Motor

Type

Model ... Q'ty

No. of Poles


Nominal Output

Coil Resistance

(Ambient Temp. 20 ° C) mm

W

Ohm

Safety Device

Run Capacitor

Type



Micro F

VAC


Coil

Rows

Fin Pitch

Face Area

External Finish mm m 2

CB-CRV244EH

Microprocessor

250V 25A

DC Twin Rotary (Hermetic)

G8T265FU1JW / 2,410W

FV50S ... 700

U - V : 0.36

V - W : 0.36

W - U : 0.36

Yes

Yes

Yes

CS-7L115

Open : 115 ° C, Close : 95 ° C

-

-

230V 25W

Propeller

1 ... D460

DC Motor

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

8

850 / 850

90

-

Internal Controller

Yes

Yes

-

-


2

1.4

0.595

Acrylic baked-on enamel finish


11

2-3. Other Component Specifications

Indoor Unit MCAF188R5I MCAF248R5I

Outdoor Unit GRF186R5I GRF246R5I

10

9

8

7

6

5

4

3

2

1

• Indoor air temp sensor

(Model:PTM-D51H-S3-2 TH2)

10 15 20 25 30 35 40

Temperature ( ° C)

• Indoor heat exchanger sensor

(Model:PTM-D51H-S3-2 TH1)

• Compressor temp sensor

(Model:TKS293B)

100

80

60

40

20

0

200

180

160

140

120

0 10 20 30 40 50 60 70 80 90

Temperature ( ° C)

40

• Outdoor air temp sensor

(Model:TKS295B)

• Outdoor heat exchanger sensor

(Model:TKS292B)

20

15

10

35

30

25

5

0

-20 -15 -10 -5 0 5 10 15 20

Temperature (

°

C)

12

3. DIMENSIONAL DATA


MCAF248R5I

13

Unit: mm


293

608

AIR INTAKE

ID:18

2-ID:23.6

136

12

AIR DISCHARGE

880 80

Wide tube service valve dia.12.70(1/2")

Narrow tube service valve dia.6.35(1/4")

14

2

145

Unit: mm


293

ID:18

608

AIR INTAKE

5-ID:23.6

136

12

AIR DISCHARGE

900 85

Narrow tube service valve dia.6.35(1/4")

Wide tube service valve dia.15.88(5/8")

15

51 114

Unit: mm

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Indoor Unit MCAF188R5I MCAF248R5I

Outdoor Unit GRF186R5I GRF246R5I

Indoor unit

Wide tube

*1

Wide tube service valve

Muffler

Outdoor unit

Accumulator

4-way valve

Electric expansion valve

M

Capillary tube for split flow

Narrow tube

Narrow tube service valve

Strainer

O.D.

6.35 mm

(1/4")

*1 O.D.12.70mm (1/2") ... 186 class

O.D.15.88mm (5/8") ... 246 class

Insulation of Refrigerant Tubing

IMPORTANT

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.

CAUTION

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.

Thickness:

Min. 8 mm

Wide tube

Insulation

Cooling cycle

(Defrosting cycle)

Heating cycle

Thickness:

Min. 8 mm

Narrow tube

16

5. PERFORMANCE DATA

5-1. Temperature Charts



Cooling Characteristics

1.2

(11.2)

Outdoor fan speed

Low High

1.1

(10.2)

1.0

(9.2)

Indoor air temp.30

27

° C

° C

24

° C

9

(8.2)

9

25 30 35

Outdoor air temperature (

°

C)

Outdoor fan speed

Low High

8

7

C

Indoor air temp.30

24

° C

° C

40

Heating Characteristics

3.5

(34.7)

3.0

(29.6) p.23

° C

Indoor air tem

20

° C

17

° C

2.5

(24.5)

2.0

(19.4)

–5

7

6

5

9

8

11

10

0 5 10 15 20

Outdoor air temperature ( ° C)

25

23

° C

20

° C

17

° C

–5 0 5 10 15 20


°

C)

25

6

20

18

16

14

12

10

25 30 35


°

C)

Outdoor fan speed

Low High

Indoor air tem p.30

° C

27

° C

24

° C

25 30 35


40

40

55

50

45

40

35

30

23

° C

° C

17

° C

–5 0 5 10 15 20


25

NOTE

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

Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in

heating mode. (Refer to "9-2. Overload prevention during heating.")

:Points of rating condition

Black dots in above charts indicate the following rating conditions.





17



Cooling Characteristics

1.2

(11.2)

Outdoor fan speed

Low High

1.1

(10.2)

1.0

(9.2)

Indoor air temp.30

27

° C

° C

24

° C

9

(8.2)

25 30 35


°

C)

Outdoor fan speed

Low High

15

14

13

12

11

10

9

° C

27

° C

Indoor air temp.30

24

° C

40

20

18

16

14

12

10

25

25 30 35


°

C)

Outdoor fan speed

Low High

30

Indoor air temp.30

° C

27

° C

24

° C

35


°

C)

40

40

Heating Characteristics

3.5

(34.7)

3.0

(29.6) p.23

° C

Indoor air tem

20

° C

17

° C

2.5

(24.5)

2.0

(19.4)

–5

12

11

10

16

15

14

13

0 5 10 15 20


°

C)

25

23

° C

17

° C

–5 0 5 10 15 20


°

C)

25

55

50

45

40

35

30

23

° C

Indoor air temp.

° C

17

° C

–5 0 5 10 15 20


°

C)

25

NOTE

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

Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in

heating mode. (Refer to "9-2. Overload prevention during heating.")

:Points of rating condition

Black dots in above charts indicate the following rating conditions.


Outdoor air temperature 35

°

C D.B. / 24

°

C W.B.


Outdoor air temperature 7

°

C D.B. / 6

°

C W.B.

18

5-2. Air Throw Distance Charts


Cooling

Room air temp. : 27 ° C

Fan speed : High

0

0 1 2 3

Horizontal distance (m)

4 5 6 7 8 9

1

2

3

4

Heating



: Flap angle 0 ° ,

: Flap angle 30 ° ,

0

0 1 2

: Axis air velocity 0 °


3


4 5 6 7 8

1

2

3

4

5



19



9


Cooling



0

0 1 2 3


4 5 6 7 8 9

1

2

3

4

Heating



: Flap angle 0 ° ,


0

0 1 2 3




4 5 6 7 8

1

4

5

2

3



20



9

6. ELECTRICAL DATA

6-1. Electrical Characteristics



Cooling

Indoor Unit

Fan Motor

Performance at

Rating conditions Running amp.

Power input

A

W

0.3

32

Rating conditions: Indoor air temperature: 27 ° C D.B. / 19 ° C W.B.

Outdoor air temperature: 35 ° C D.B.

Heating

Indoor Unit

Fan Motor

Performance at


Power input

Rating conditions: Indoor air temperature

Outdoor air temperature

A

W

0.3

34

20 ° C D.B.

7 ° C D.B. / 6 ° C W.B.



Cooling

Indoor Unit

Fan Motor

Performance at


Power input

A

W

0.51

55

Rating conditions: Indoor air temperature: 27 ° C D.B. / 19 ° C W.B.

Outdoor air temperature: 35 ° C D.B.

Heating

Indoor Unit

Fan Motor

Performance at


Power input

Rating conditions: Indoor air temperature

Outdoor air temperature

A

W

0.54

58

20 ° C D.B.

7 ° C D.B. / 6 ° C W.B.

Outdoor Unit

Fan Motor + Compressor

230V Single-phase 50Hz

6.7

1,468

Outdoor Unit



7.1

1,541

Outdoor Unit



10.19

2,300

Outdoor Unit



10.76

2,432

Complete Unit

7.0

1,500

Complete Unit

7.4

1,575

Complete Unit

10.7

2,355

Complete Unit

11.3

2,490

21

6-2. Electric Wiring Diagrams



WARNING

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

GRN/YEL

IND LAMP ASSY

BLK

BLK

RED

WHT

BLK

GND

BLK

WHT

WHT

WHT

BRN

GRN/YEL

BLU

WHT

RED

CONNECTOR

WHT

WHT

3P -

CORE

FERRITE

BLU

WHT

RED

YEL

BLK

GRY

RED

ORG

BLK

BLK

BLK

RED

BLU

YEL

WHT

BLK

BLK

THERMISTOR

COIL

YEL

YEL

BLK

BLK

THERMISTOR

OUT DOOR

THERMISTOR

COMPRESSOR

BLK

BLK

(BLU)

(BLU)

2P-CONNECTOR

BLK

RED

BLU

YEL

WHT

7P-CONNECTOR

GRN/YEL

22



GRN/YEL

WARNING

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

IND LAMP ASSY

BLK

BLK

RED

WHT

BLK

GND

BLK

YEL

GRY

23

7. INSTALLATION INSTRUCTIONS

7-1. Installation Site Selection


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.

AVOID: direct sunlight.

nearby heat sources that may affect performance of the unit.

areas where leakage of flammable gas may be expected.

places where large amounts of oil mist exist.

DO: select an appropriate position from which every corner of the room can be uniformly cooled. (High on a wall is best.) select a location that will hold the weight of the unit.

select a location where tubing and drain hose have the shortest run to the outside.

allow room for operation and maintenance as well as unrestricted air flow around the unit. (Fig. 1) install the unit within the maximum elevation difference (H) above or below the outdoor unit and within a total tubing length (L) from the outdoor unit as detailed in Table 1 and Fig. 2.

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.

Table 1

Model

MCAF188 / 248

Max. Allowable Tubing

Length at Shipment

(m)

10

Limit of Tubing

Length (L)

(m)

30

5 cm min.

CAUTION

15 cm min.

5 cm min.

Indoor unit

For stable operation of the air conditioner, do not install wall-mounted type indoor units less than

1.5 m from floor level.

Minimum height from floor level

1.5 m

* If total tubing length becomes 10 to 30 m, charge additional refrigerant (R410A) by 25 g/m.

No additional charge of compressor oil is necessary.

INDOOR

UNIT

Elevation difference (H)

Front View

Limit of Elevation

Difference (H)

(m)

15

Fig. 1

Tubing length (L)

Fig. 2

Fig. 3

OUTDOOR

UNIT

Floor level

Required Amount of

Additional Refrigerant

(g/m)*

25

Wall

24


AVOID: heat sources, exhaust fans, etc. (Fig. 4) damp, humid or uneven locations.

DO: position the outdoor unit in a protected location where snow will not blow into it.

choose a place as cool as possible.

choose a place that is well ventilated.

allow enough room around the unit for air intake/ exhaust and possible maintenance. (Fig. 5a or 5b) 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 or 5d)

Install cushion rubber under unit's feet to reduce vibration and noise. (Fig. 5e) use lug bolts or equal to bolt down unit, reducing vibration and noise.

Install in a location where no antenna of a television or radio exists within 3 meters.

(GRF186)

Air intake

Concrete or equal

Outdoor unit

NO

Hot air

(GRF186)

Fig. 4

Air intake

Min.

5 cm

Min. 10 cm

Air discharge Min.

40 cm

Valve side

Min.

25 cm

Fig. 5a

Anchor bolts

(4 pcs.)

Min. 10 cm

(GRF246)

Air intake

Min.

10 cm

Min. 20 cm

Air discharge Min.

50 cm

Valve side

Min.

25 cm

Exhaust fan

Heat source

Obstacle above

Min.

2 m

Min.

2 m

Ground

Min. 10 cm

Air intake

Obstacle above

Min.

2 m

Min.

2 m

About 40 cm

About 10 cm Fig. 5b

Ground

Min. 20 cm

Air intake

Fig. 5c

(GRF246)

Anchor bolts

(4 pcs.)

Min. 15 cm

Air intake

Concrete or equal

Cushion rubber

About 40 cm

About 15 cm

Fig. 5e

Fig. 5d

25

7-2. 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 2 lists recommended wire lengths and diameters for power supply systems.

NOTE

Refer to the wiring system diagram (Fig. 6) for the meaning of (A), (B) and (C) in Table 2.

Table 2

Cross-Sectional

Area (mm 2 )

Model

GRF186

GRF246

(A) Power Supply Wiring Length (m)

2.5mm

2

25

25

(B) Power Line

(C) Control Line

(m)

2.5mm

2

30

30

Fuse or Circuit

Breaker Capacity

20A

20A

WARNING

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.).

Each wire must be firmly connected.

No wire should be allowed to touch refrigerant tubing, the compressor, or any moving part.

WARNING

To avoid the risk of electrical shock, each air conditioner unit must be grounded.

For the installation of a grounding device, please observe local electrical codes.

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.

Place a dedicated ground more than 2 meters away from other grounds and do not have it shared with other electric appliances.

WIRING SYSTEM DIAGRAM

INDOOR

UNIT

Terminal

1

2

3

4

(B)

Grounding line

(C)

Power supply

Single-phase 220 to 240VAC 50HZ

L

N

(A)

OUTDOOR

UNIT

Terminal

1

2

3

4

L

N

Fig. 6

Grounding line

CAUTION

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.

Do not run wiring for antenna, signal, or power lines of television, radio, stereo, telephone, security system, 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.

26

7-3. Remote Control Unit Installation Position

The remote control unit can be operated from either a non-fixed position or a wall-mounted position.

To ensure that the air conditioner operates correctly, do not install the remote control unit in the following places:

In direct sunlight

Behind a curtain or other place where it is covered

More than 8 m away from the air conditioner

In the path of the air conditioner’s airstream

Where it may become extremely hot or cold

Where it may be subject to electrical or magnetic interference

Where there is an obstacle between the remote control unit and the air conditioner (since a check signal is sent from the remote control unit every 5 minutes)

7-3-1. Mounting on a Wall

Before mounting the remote control unit, press the ON/OFF operation button at the mounting location to make sure that the air conditioner operates from that location. The indoor unit should make a beeping sound to indicate that it has received the signal.

Remote control unit mount

Rear side

Press

Mounting screws

4

×

16 (included)

Set in place

Hole

To prevent loss of the remote control unit, you can connect the remote control unit to the mount by passing a string through the remote control unit and attachment hole.

To take out the remote control unit, pull it forward.

Fig. 7

27

7-4. How to Test Run the Air Conditioner

After turning on power to the air conditioner, use the remote controller and follow the steps below to conduct the test run.

(1) Set the remote controller in Test Run mode. (Fig. 8a) a) Press and hold the ION button and the 1HR.

TIMER button.

b) Then press and hold the ACL (Reset) button with a pointed object such as the tip of a pen.

After 5 seconds, release the ACL button first.

c) Then release the ION and 1HR. TIMER buttons.

d) appear and "oP-1" blinking in the remote controller display area. (Fig. 8b)

(2) Start Cooling mode test run by pressing the ON/OFF operation button of the remote controller. (Fig. 8a)

• This starts the fan producing uncooled forced air with the 4 indicator lamps (OPERATION lamp, TIMER lamp and QUIET lamp, and ION lamp) on the main unit blinking. (Fig. 8c)

• After 3 minutes, the system shifts into cooling operation, and cool air will start to be felt. Cool mode test run is unaffected by the room temperature.

(3) Press the ON/OFF operation button of the remote controller again to stop the test run. (Fig. 8a)

(4) Finally press the ACL (reset) button of the remote controller to release it from Test Run mode to return to normal mode. (Fig. 8a)

• " " and "oP-1" will disappear from the remote controller display area.

IMPORTANT

After the test run is completed, be sure to press the ACL

(reset) button to return to normal mode. The air conditioner will not operate correctly if this is not done.

ION button

Fig. 8a

ON/OFF operation button

1HR.

TIMER button

AC

(ReLset) button

Fig. 8b

OPERATION

TIMER

QUIET

ION

OPERATION

OPERATION lamp

TIMER lamp

QUIET lamp

ION lamp

Fig. 8c

28

7-5. Remove the Grille to Install the

Indoor Unit

Basically, these models can be installed and wired without removing the grille. If access to any internal part is needed, follow the steps as given below.

How to remove the grille

(1) Grasp both ends of the air intake grille, and remove it by opening towards the front and pulling towards you. (Fig. 9a)

(2) Remove the 3 screws. (Fig. 9b)

(3) Remove the screw on the right side cover plate and open the cover. (Fig. 10a)

(4) Take out the thermistor from the grille. (Fig. 10b)

(5) Press the 3 tabs at the top of the grille and the 3 tabs on the front face to separate the grille from the frame. (Fig. 11a)

(6) Pull the grill toward you to remove it.

How to replace the grille

(1) When installing the grille, place the bottom of the grille into the frame first. (Fig. 11b)

Then insert the tabs on the top of the grille and on the front face into the frame.

(2) Make sure that the grille and frame are firmly fitted together by engaging the tabs.

(3) Attach the thermistor on the grille. (Fig. 10a)

(4) Close the cover and replace the screw. (Fig. 10a)

(5) Affix the grille with the 3 previously removed screws. (Fig. 9b)

(6) Install the air intake grille.

(a) Allow the edge of the air intake grille to slide into the top of the indoor unit, and then insert it all the way inside. (Fig. 12a)

(b) Press the bottom right and left corners and center of the air intake grille to attach it to the indoor unit.

(Fig. 12b)

NOTE

Attach so that the round pins at the top right and left corners of the air intake grille are inserted into the grooves at the top right and left of the indoor unit.

Tab

Air intake grille

Fig. 9a

Fig. 10a

Tab

Fig. 11a

Fig. 11b

Groove

Pin

Grille

Thermistor

Cover

Fig. 9b

Thermistor

Fig. 10b

Fig. 12b Fig. 12a

29

8. MAINTENANCE

8-1. Address Setting of the Remote

Control Unit

The address can be set in order to prevent interference between remote controllers when two indoor units are installed near each other. The address is normally set to "A." To set a different address, it is necessary to change the address on the second remote controller.

NOTE

Once changed, you cannot restore the original address setting of the air conditioner.

(1) Switch on the power source.

(2) Break the address-setting tab marked "A" on the second remote controller to change the address

(Fig. 13). When the tab is removed, the adress is automatically set to B (Fig. 14).

(3) Press and hold the remote controller ION button and 1 HR TIMER button. Then, press and hold the ACL (reset) button with a pointed object such as the tip of a pen. After 5 seconds, release ACL button first, then release ION and 1 HR TIMER buttons, "oP-1" (test run) appears, blinking in the remote controller clock display area.

(4) Each time the 1 HR TIMER button is pressed, the display changes as shown below. Press this button 2 times to change the display to "oP-7"

(address setting). (Fig. 15)

Test run mode

Self-diagnostic mode

Address setting mode

(5) "oP-7" has now been selected for address setting.

(6) Press the ON/OFF operation button on the remote controller. (Fig. 15) Check that the "beep" signalreceived sound is heard from the second indoor unit (approximately 5 times). The sound you hear is the signal that the remote controller address has been changed.

(7) Finally press the remote controller ACL (reset) button to cancel the blinking "oP-7" display. (Fig.

15)

Changing of the second remote controller address is now completed.

ION button

Tab

Fig. 13

Fig. 14

ACL button

ON/OFF operation button

1HR.

TIMER button

ADDRESS

Fig. 15

AC

(ReLset) button

30

8-2. Disconnecting and Connecting Positive Connector for Outdoor Unit

Pull the cover upward

One of the two types of connectors illustrated at left is used. Their basic structure is the same for each.

How to Disconnect

Hold the resin connector cover, and pull the connector off.

You cannot disconnect the connector by pulling the wire since it is locked inside. Always hold the cover to disconnect. (See illustration at left.) For the connector without the resin cover, push the lock in the direction of "2" while pulling it off.

How to Connect

In order to connect, hold the resin cover of the connector and push it in. Confirm the click sound for the inside lock.

When the cover is pulled upward, the lock is released with the sequence of 1 and 2.

31

9. FUNCTIONS

9-1. Operation Functions

Emergency operation

Emergency operation is available when the remote controller malfunctions, has been lost, or otherwise cannot be used.

To operate the system, press the OPERATION button, which is also used as the receiver, below the unit display.

Each time this button is pressed, the OPERATION lamp changes color to indicate the type of operation. Select the desired type of operation.

COOL HEAT

(GREEN) (RED)

STOP

• The set temperature is 2 ° C below the detected room temperature in the case of cooling operation, and 2 ° C above the room temperature in the case of heating operation. The flap and fan speed settings are AUTO.

AUTO cooling/heating operation

Selecting the operation mode

• When AUTO mode is selected, the microprocessor calculates the difference between the set temperature and the room temperature, and automatically switches to Cooling or

Heating mode.

Room temp. Set temp. COOL

Room temp. Set temp. HEAT

• As shown by the example in the figure below, with AUTO cooling / heating operation, the mode changes between

Heating and Cooling mode according to changes in the relationship between the current room temperature and the set temperature.

Example

Example of operation in AUTO mode with the set room temperature at 23

°

C.

Room temp.

Zone A

Set temp.

23

Zone B

Zone C

Zone C

Zone B

Zone A

Compressor

More than

1 hour

Within

1 hour

Operation mode

ON

Cooling

OFF

ON

Heating

OFF

ON

Cooling

SENSOR DRY

During DRY operation, the system adjusts the room temperature and fan speed according to the conditions in the room, in order to maintain a comfortable room environment.

SENSOR DRY operation

• DRY operation is as shown in the figure below.

Load

COOL zone

A zone

B zone

Conditions are monitored at all times when the room temperature is below 15

°

C.

DRY A

The compressor operation frequency varies.

The indoor fan operates with 1/f fluctuation.

DRY B

The compressor operates at a low operating frequency.

The indoor fan operates with 1/f fluctuation.

Monitor

• Monitoring operation takes place when the room temperature is below 15 ° C, or more than 3 ° C below the set temperature.

• When the monitoring range is entered, the compressor stops, and the indoor fan operates with 1/f fluctuation.

NOTE

The Sensor Dry operation during the Low Ambient Cooling

Mode (outside air temperature:15 ° C or lower) is as follows.

DRY A and DRY B

The compressor operates a cycle of 3 minutes ON and 6 minutes OFF repeatedly.

PAM- control

• In order to further improve inverter performance, control is switched between PWM control at low operation speeds, and

PAM control at high operation speeds, making the most effective use of power.

32

HIGH POWER

This function acts to raise the power but keeps the AC system in the same operating mode.

This function is set with the HIGH POWER button on the remote controller.

(It can be set regardless of the temperature and fan speed settings.)

HIGH POWER operation from remote controller

The unit operates at maximum output for 30 minutes, regardless of the desired temperature.

The fan speed is 1 step above "High."

Frequency

MAX

0 Time

30 min.

5 min.

Start End

NOTE

• When HIGH POWER operation ends, the unit operates at low

Hz for 5 minutes, regardless of the thermostat OFF conditions.

• When in DRY mode, operation is in the cooling zone.

Lamp colors

OPERATION lamp

HEAT operation

DRY operation

COOL operation

FAN operation

DEFROSTING operation

TIMER lamp

QUIET lamp

ION lamp

Red

Orange

Green

Green

Red and Orange alternately

Green

Green

Green

NIGHT SETBACK

• When NIGHT SETBACK operation is set, the temperature and fan speed settings will be adjusted automatically to allow comfortable sleep.

• When NIGHT SETBACK operation is set, " mark" appears on the remote controller. The main unit display lamp also becomes dimmer.

COOL and DRY modes

When the night setback mode is selected, the air conditioner automatically raises the temperature setting 1 ° C when 30 minutes have passed after the selection was made, and then another 1 ° C after another 30 minutes have passed, regardless of the indoor temperature when night setback was selected.

This enables you to save energy without sacrificing comfort.

This function is convenient when gentle cooling is needed.

Setting temperature

1 ° C (2 ° F)

1 ° C (2 ° F)

Press the NIGHT

SETBACK button

30 min.

30 min.

Time

HEAT mode

When the night setback mode is selected, the air conditioner automatically lowers the temperature setting 2 ° C when 30 minutes have passed after the selection was made, and then another 2 ° C after another 30 minutes have passed, regardless of the indoor temperature when night setback was selected.

This enables you to save energy without sacrificing comfort.

This function is convenient when gentle heating is needed.


2 ° C (4 ° F)

2

°

C (4

°

F)

Press the NIGHT

SETBACK button

30 min.

30 min.

Time

Timer backup

• Operation stops if there are no operator controls for 25 hours or longer after unit operation switched from OFF to ON by use of

ON timer operation.

33

9-2. Protective Functions

Overload prevention during heating

During HEAT operation, the temperature of the indoor heat exchanger is used to control the frequency and lessen the load on the compressor before the protective device is activated.

Approx.

53

A

Indoor heat exchanger

A. Control start

B. Control end

B Approx.

47 a b c d a.

b.

c.

d.

Area: Automatic capacity control

When Point A has been exceeded, the operation frequency is reduced by a certain proportion.

Area: Frequency increase is prohibited.

At Point B and below, overload prevention is ended and control is the same as in the a area.

Freeze prevention

During COOL or DRY operation, freezing is detected and operation is stopped when the temperature of the indoor heat exchanger matches the conditions below.

1.

2.

Freeze-prevention operation is engaged when the temperature of the indoor heat exchanger is below 6 ° C.

Restart after freeze-prevention operation occurs when the temperature of the indoor heat exchanger reaches 8 ° C or above.

C

8

6

A B

2

* a b c d a.

b.

c.

d.

Area: Automatic capacity control

When the temperature drops below Point A, the operation frequency is reduced by a certain proportion.

Area: Frequency increase is prohibited.

When the temperature reaches Point C or above, freezing prevention is ended and control is the same as in the a area.

*

When the temperature drops to below 2 ° C (continuously for 2 minutes or longer), the compressor stops.

Once the freeze condition is detected, the air conditioner will work less than the maximum frequency until it is turned off.

•

•

NOTE

The Freeze Prevention Control during the Low Ambient

Cooling Mode (outside air temperature:15 ° C or lower) is as follows.

The compressor stops when the temperature of indoor heat exchanger becomes less than 2 ° C.

The compressor restarts when the temperature of indoor heat exchanger becomes 8 ° C or higher.

Cold-air prevention during heating

During heating, the fan speed is set to "LL" (very low) or stopped.

As the temperature of the indoor heat exchanger rises, the fan speed is changed to the set speed.

Set fan speed

High

At stability of operation

At start of operation

LL

Stopped

25 30 Approx. 40

Indoor heat exchanger temperature (

°

C)

NOTE

• The fan speed is forcibly changed to "LL" beginning 30 seconds after the thermostat turns OFF.

• At stability of operation refers to operation when the room temperature has approached the set temperature.

• When HEAT operation starts, the indoor fan is stopped until the temperature of the indoor heat exchanger reaches 20

°

C or higher, or until the room temperature reaches 15

°

C or higher.

Compressor discharge temperature control

This function controls the operation frequency to prevent the compressor discharge temperature from rising more than a specified temperature.

Compressor discharge temperature (

°

C)

Approx.

101

A

Approx.

94

B a b c d a.

b.

c.

d.

Area: Automatic capacity control.

When the temperature rises above Point A, the operation frequency is reduced at a specified rate.

Area: Further frequency increase is prohibited.

When the temperature falls below Point B, prevention of a rise in frequency is released and the air conditioner operates as in a area.

*

The compressor will stop if the temperature of the compressor discharge exceeds 120 ° C due to shortage of gas or other reason.

34

Defrost detection and release

Reverse-Cycle Defrosting

Defrosting Sequence

Heating operation

Outdoor fan ON

4-way valve ON

Frost sensing

Defrost detection occurs in either of the following cases:

•

• The temperature of the heat exchanger remains at or below the L1 line for 3 minutes after the start of

HEAT operation.

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 temp.

0

Ambient temp.

L2

L1

Frosting area

Reverse-cycle defrosting operation

Compressor 1 minute after it is stopped,

compressor is ON.

Outdoor fan OFF

Indoor fan OFF

4-way valve OFF

Operation lamp Repeatedly switches between red and orange illumination.

Releasing of defrosting

Outdoor heating exchanger temp. is over 20

°

C.

Defrosting operation lasts 12 minutes (maximum).

2 minutes after it is stopped, compressor is ON.

4-way valve is ON. Outdoor fan is ON.

NOTE

If the air conditioner is turned off during the defrosting cycle, it will continue defrosting and turn itself off after defrosting is completed.

CT (Peak current cut-off control)

• This function prevents the circuit breaker or fuse from operating

to open the circuit. This function works when electrical current has increased due to an increase in the cooling / heating load, or to a decrease in the power supply voltage. In these cases, operation frequency is reduced or operation is interrupted automatically to control the electrical current for operation.

• When the cause of the increase in electrical current is rectified, the system will resume operation in the original mode.

MCAF188R5I (A)

Cooling Dry Heating

Peak current cut-off trips

Hz down 14.0

22.5

15.0

MCAF248R5I

Peak current cut-off trips

Hz down

(A)

Cooling Dry Heating

22.5

14.0

17.5

NOTE Electrical current setting for COOL operation is used during DEFROST operation.

Operation Cut-Off Control in abnormal ambient temperature

• The following three protective actions are available to prevent the compressor from operating with abnormal loads.

At that time, they initiate thermo-off (stopping the outdoor unit) of the air conditioner.

Mode : Cooling

Cut-off action

Low ambient temp.

cut-off

Thermo-off t : ambient temp t -22 ° C

Thermo-on t : ambient temp t > -18 ° C

Mode : Heating

Cut-off action

High ambient temp.

cut-off

Low ambient temp.

cut-off

Thermo-off t : ambient temp t 25 ° C t -20 ° C

Thermo-on t : ambient temp t < 24 ° C t > -16 ° C

35

10. TROUBLESHOOTING

10-1. Precautions before Performing Inspection or Repair

After checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair.

High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge

(charging voltage DC 310V) 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 controller LED (red) turns OFF.

If the outdoor controller is normal, approximately 30 seconds will be required for the charge to dissipate. However, allow at least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller.

10-2. Method of Self-Diagnostics

Follow the procedure below to perform detailed trouble diagnostics.

NOTE

1: If the operation lamp blinks every 0.5 seconds immediately when the power is turned ON, there is an external ROM (OTP data) failure on the indoor circuit board, or a ROM socket insertion problem, or the ROM has not been installed.

2: The failure mode is stored in memory even when the power is not ON.

Follow the procedure below to perform diagnostics.

< Clock display >

Test run mode

Self-diagnostic mode

Address setting mode

PROCEDURE

After turning on power to the air conditioner, use the remote controller and follow the steps below to execute self-diagnostics.

Step 1: Press and hold the remote controller ION button and 1 HR TIMER button. Then, press and hold the ACL (reset) button with a pointed object such as the tip of a pen. After 5 seconds, release ACL button first, then release ION and 1 HR TIMER buttons, "oP-1"

(test run) appears, blinking in the remote controller clock display area.

Step 2: Next, press the 1 HR TIMER button once to change the display from "oP-1" to "oP-3" (self-diagnostics). (The display continues to blink.)

Step 3: Finally press the ON/OFF button to engage self-diagnostics mode.

• The self-diagnostics function utilizes the 3 indicator lamps on the main unit, in combinations of ON lamps, blinking lamps, and OFF lamps, to report the existence of sensor trouble or a protective operation. (The lamps blink or remain ON for 5 seconds, then turn OFF for 2 seconds.)

Self-diagnostics is completed when the buzzer sounds 3 short beeps.

• A maximum of 3 self-diagnostics reports are displayed, for 5 seconds each, beginning with the most recent report. Following this display the lamps turn OFF. In order to view the self-diagnostics results again, press the ON/OFF button again.

• The 3 lamps remain OFF if no trouble has occurred.

<IMPORTANT> After self-diagnostics is completed, be sure to press the

ACL (reset) button to return to normal mode. The air conditioner will not operate if this is not done.

ION button

ON/OFF operation button

1HR.

TIMER button

ACL

(Reset) button

36

(1) Self-diagnostics Lamps

INDOOR UNIT

OPERATION lamp

TIMER lamp

QUIET lamp

ION lamp

OPERATION button

REMOTE CONTROL receiver

• Since the indications cover various units, the corresponding parts listed below may not be present in some models.

....

OFF ....

Blinking ....

ON (Illuminated)

Quiet

(3)

Indication on indoor unit

Timer

(2)

Operation

(1)

Code Diagnostics items

S01 Room temperature sensor failure

Diagnostics contents

S02 Indoor heat exchanger sensor failure

(1) Sensor open circuit or short circuit

(2) Contact failure at connector or open circuit at terminal crimping location

(short-circuit detection only for the humidity sensor)

(3) Indoor/outdoor PCboard failure

S03 Humidity sensor failure

S04

S05

Compressor temperature sensor failure

Outdoor heat exchanger sensor failure

(1) Sensor open circuit or short circuit

(2) Contact failure at connector or open circuit at terminal crimping location

(3) Outdoor PCboard failure

S06

S07

E01

E02

E03

E04

E05

E06

E07

E08

E09

E10

Outdoor air temperature sensor failure

Outdoor electrical current detection failure

Outdoor PCboard failure

Indoor/outdoor communications failure

(serial communications)

• HIC circuit failure

• Power Tr (transistor) circuit failure

(1) Mis-wiring (2) AC power failure (3) Blown fuse (4) Power Relay failure

(5) Indoor or outdoor PCboard failure (6) Outdoor Fan Motor failure (7) Reactor failure

(8) High-Pressure Switch failure (9) Overload Relay failure (10) Magnetic Coil failure

* See detailed flowchart in this section.

(1) HIC or power Tr failure (2) Outdoor fan does not turn. (3) Instantaneous power outage

(4) Service valve not opened. (5) Outdoor fan blocked. (6) Continuous overload operation

(7) Compressor failure (8) Outdoor PCboard failure

Outdoor unit external ROM (OTP data) failure

(1) External ROM data failure (2) Outdoor PCboard failure

Peak current cut-off

(1) Instantaneous power outage (2) HIC or power transistor failure


PAM circuit failure

Active circuit failure

(1) Outdoor PCboard failure (2) Outdoor power supply voltage failure

Compressor discharge overheat prevention activated.

(1) Electric expansion valve failure (2) Capillaries choked (3) Shortage of refrigerant

(4) Continuous overload operation (5) Outdoor fan does not rotate (6) Outdoor PCboard failure

Indoor fan operating failure (1) Fan motor failure (2) Contact failure at connector (3) Indoor PCboard failure

4-way valve switching failure

Indoor zero-cross failure

No-refrigerant protection

(1) 4-way valve failure (heat pump model only)


(1) Service valve not opened. (2) Shortage of refrigerant

DC compressor drive circuit failure (1) Open phase (2) Outdoor PCboard failure

E11

E12

E13

Outdoor fan operating failure (1) Fan motor failure (2) Contact failure at connector (3) Outdoor PCboard failure

Outdoor system communications failure

OLR operation

Outdoor power supply open phase

Outdoor coil freezing

Freeze-prevention operation activated.

(1) Mis-wiring (2) Blown fuse (3) Power Relay failure (4) Outdoor PCboard failure

(5) Compressor failure

* See detailed flowchart in this section.

(1) Indoor fan system failure (2) Shortage of refrigerant (3) Low-temperature operation

37

(2) If the self-diagnostics function fails to operate

Check the indoor unit.

• No indicators illuminate and the indoor fan does not rotate.

• Check the power voltage.

Blown

Is the fuse blown?

Normal

Replace the controller.

Replace the circuit board or the fuse.

10-3. Checking the Indoor and Outdoor Units

(1) Checking the indoor unit

No.

1

Control

Use the remote controller to operate the unit in "TEST run" mode. To determine whether the mode is currently in

"TEST run" mode, check the 4 indicator lamps on the unit. If all 4 are blinking, the current mode is "TEST run."

Check items (unit operation)

• The rated voltage must be present between inter-unit wirings 1 and 2.

• Connect a 5 k ohm resistor between inter-unit wirings 2 and 3. When the voltage at both ends is measured, approximately 12 to 15V DC must be output and the multimeter pointer must bounce once every 8 seconds.

Or instead of measuring the voltage, you can insert an LED jig and check that the LED flickers once every 8 seconds.

If there are no problems with the above, then check the outdoor unit.

For the "Test run" procedure, refer to 7.4" How to Test Run the Air Conditioner".

(2) Checking the outdoor unit

No.

1

2

Control

Apply the rated voltage between outdoor unit terminals L and N.

Short-circuit the outdoor unit COM terminal to the T-RUN terminal.

Check items (unit operation)

• The control panel LED (red) must illuminate.

• The compressor, fan motor, and 4-way valve must all turn on.

If there are no problems with the above, then check the indoor unit.

TEST/T-RUN terminals

Using the TEST/T-RUN terminals

T-RUN : Test run (compressor and fan motor turn ON).

TEST/MV : Compresses time to 1/60th (accelerates operation by 60 times faster than normal).

(TEST)/MV T-RUN COM

38

(3) Serial Communication Error Identification Procedure

If the lamps on the main body show the following conditions after the completion of self-diagnostics, a communication error between the indoor unit and outdoor unit might be considered.

In such a case, identify the breakdown section by using the following procedure.

NOTE

Lamp

Condition

E01

E12

Refer to "Method of Self-Diagnostics" for the self-diagnostics procedure.

Quiet

(3)

Timer Operation

(2) (1)

: Off

: Blinking

: Illuminated

< Before the Operation >

WARNING

For terminal strip short circuit work or inter-unit wiring removal, turn off the power to avoid an electric shock.

Release the terminal strip short circuit after the completion of self-diagnostics.

CAUTION

Do not perform the short-circuit work between any other terminals except for specified ones on the specified terminal strip. If such work is performed between the incorrect terminals, the unit might be broken.

< Convenient Tool for Short-Circuit Work ( for example ) >

Alligator Clip

Cable

Alligator Clip

< Check Items before Troubleshooting Serial Communication Start >

After confirming that the following errors do not exist, start the "Troubleshooting Serial Communication" in "Condition: E01 and E12".

1. Mis -wiring (inter-unit cable, etc.)

2. AC power failure

3. Blown fuse

4. Power Relay failure

5. Outdoor Fan Motor failure (defective insulation, etc.)

6. Reactor failure (defective insulation, etc.)

7. High-Pressure Switch failure

8. Overload Relay failure

9. Magnetic Coil failure (defective insulation, short-circuit, etc.)

10. Compressor failure (defective insulation, etc.)

(3-1) Condition: E01

Troubleshooting Serial Communication

Is the voltage of about DC12V or more given between the terminals

2 and 3 on the outdoor unit terminal strip

(Serial Communication Line) ?

(Fig. 1)

No

-

V

+

1 2 3

1 2 3

Indoor Unit

Fig. 1

Outdoor Unit

4 5 6

Power

1 2 3

1 2 3

Indoor Unit

-

V

+

Fig. 2

Outdoor Unit

4 5 6

Power

1. Turn OFF the power and wait until the power lamp (LED) of the outdoor unit controller is turned OFF.

2. Disconnect the cable from the terminal 3 on the indoor unit terminal strip. (Fig. 2)

3. Turn ON the power.

Yes

A

( Continued to the next page A. )

B

( Continued to the next page B. )

39

( Continued from the previous page A. )

A

( Continued from the previous page B. )

B

Yes

Is the voltage of about DC22V to

24V given between the terminals

2 and 3 on the indoor unit terminal strip

(Serial Communication Line) ?

(Fig. 2)

No

Defect in the indoor unit

P.C. board

Defect or connection error in the inter-unit cable

1. Turn OFF the power and wait until the power lamp (LED) of the outdoor unit controller is turned OFF.

2. Short-circuit between the terminals 2 and 3 on the outdoor unit terminal strip. (Fig. 3)

1. Turn ON the power and operate the system using the remote controller or the operation button on the indoor unit.

2. Perform the self-diagnosis five seconds after the operation start.

1 2 3

Outdoor Unit

4 5 6

Power

1 2 3

Indoor Unit

Fig. 3

What is the latest self-diagnosis result ?

Condition: E12

Defect in the outdoor unit

P.C. board.

Condition: E01

1. Turn off the power and wait until the power lamp (LED) of the outdoor unit controller is turned OFF.

2. Remove the short-circuit between the terminals 2 and 3 on the outdoor unit terminal strip.


Short-circuit between the terminals 2 and 3 on the indoor unit terminal board. (Fig. 5)



1 2 3

Outdoor Unit

4 5 6

Power

1 2 3

Indoor Unit

Fig. 4

1 2 3 4

Outdoor Unit

5 6

Power

1 2 3

Indoor Unit

Fig. 5

Condition: E12

Defect or connection error in the inter-unit cable


Condition: E01


P.C. board

40

(3-2) Condition: E12

Troubleshooting Serial Communication


2. Disconnect the cable from the terminal 3 on the Outdoor unit terminal strip. (Fig. 6)



1 2 3

Outdoor Unit

4 5 6

Power

1 2 3

Indoor Unit

Fig. 6


Condition: E12





Condition: E01

Defect in the outdoor unit

P.C. board

1 2 3

Outdoor Unit

4 5 6

Power

1 2 3

Indoor Unit

Fig. 7


Condition: E12


P.C. board

Condition: E01

Defect in the inter-unit cable

41

10-4. Trouble Diagnosis of Fan Motor

10-4-1. Indoor Fan Motor

This indoor 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.

To perform diagnosis, operate the unit in cooling mode with indoor fan speed "High". Next, make sure that the indoor unit receive the signals from the remote controller when the ON/OFF operation button is pressed.

Important: (A) Turn OFF the power before connecting or disconnecting the motor connectors.

(B) When performing voltage measurement at the indoor controller connector for (3) in the table below, the DC motor will trip and voltage output will stop approximately 1 minute after operation is started. For this reason, to measure the voltage again, turn OFF the unit once using the remote controller, and then start the air conditioner again.

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

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

(Diagnostic procedure)

* Disconnect the motor connectors and measure the voltage at the DC motor connectors on the indoor unit controller (3 locations).

Measurement location

(1) Vm-Gnd: Between pin 1 and pin 3

(2) Vcc-Gnd: Between pin 4 and pin 3

(3) Vs-Gnd: Between pin 5 and pin 3

DC 230V or more

DC 14V or more

Normal value

Fluctuation between DC 1.7 to 6.1V

(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. Indoor unit controller trouble

(Replace the controller .)

(Reference) DC motor connector pin arrangement

Pin 1: Vm (red)

Pin 2: Not used

Pin 3: Gnd (black)

Pin 4: Vcc (white)

Pin 5: Vs (yellow)

Pin 6: PG (blue)

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

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

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

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

(Remedy for symptom 3 to 5)

It is not possible to identify whether the trouble is indoor unit controller trouble or motor trouble.

Therefore, first replace the indoor unit controller, then (if necessary) replace the DC motor.

42

10-4-2. Outdoor 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.

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.

[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).

Normal value Measurement location

(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

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.

(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

GRF186R5I

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)

GRF246R5I

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)

[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.

43

10-5. Noise Malfunction and Electromagnetic Interference

An inverter A/C operates using pulse signal control and high frequencies. Therefore, it is susceptible to the effects of external noise, and is likely to cause electromagnetic interference with nearby wireless devices.

A noise filter is installed for ordinary use, preventing these problems. However, depending on the installation conditions, these effects may still occur. Please pay attention to the points listed below.

(1) Noise malfunction

This refers to the application of high-frequency noise to the signal wires, resulting in abnormal signal pulses and malfunction.

Locations most susceptible to noise Trouble

1. Locations near broadcast stations where there are strong electromagnetic waves

2. Locations near amateur radio (short wave) stations

3. Locations near electronic sewing machines and arc-welding machines

Either of the following trouble may occur.

1. The unit may stop suddenly during operation.

2. Indicator lamps may flicker.

Correction

(The fundamental concept is to make the system less susceptible to noise.)

- Insulate for noise or distance from the noise source. -

1. Use shielded wires.

2. Move unit away from the noise source.

(2) Electromagnetic interference

This refers to noise generated by high-speed switching of the microcomputer and compressor. This noise radiates through space and returns to the electric wiring, affecting any wireless devices (televisions, radios, etc.) located nearby.

Locations most susceptible to noise Trouble Correction

1. A television or radio is located near the

A/C and A/C wiring.

2. The antenna cable for a television or radio is located close to the A/C and A/C wiring.

3. Locations where television and radio signals are weak.

1. Noise appears in the television picture, or the picture is distorted.

2. Static occurs in the radio sound.

1. Select a separate power source.

2. Keep the A/C and A/C wiring at least 1 meter away from wireless devices and antenna cables.

3. Change the wireless device’s antenna to a highsensitivity antenna.

4. Change the antenna cable to a BS coaxial cable.

5. Use a noise filter (for the wireless device).

6. Use a signal booster.

44

11. CHECKING ELECTRICAL COMPONENTS

11-1. Measurement of Insulation

Resistance

Clip

The insulation is in good condition if the resistance exceeds 1M ohm.

Ground wire

Probe

11-1-1. Power Supply Cord

Clamp the grounding wire of power cord with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the two power wires. (Fig. 1)

Then also measure the resistance between the grounding and other power terminals. (Fig. 1)

Insulation tester

Fig. 1

Terminal plate


Clamp an aluminum plate fin or copper tube with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw on the terminal plate. (Fig. 2)

Note that the ground line terminal should be skipped for the check.

Clip

Copper tube or metallic part


Clamp a metallic part of the unit with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw where power supply lines are connected on the terminal plate. (Fig. 2)

Fig. 2

Probe

Insulation tester

Probe

11-1-4. Measurement of Insulation

Resistance for Electrical Parts

Disconnect the lead wires of the desired electric part from terminal plate, capacitor, etc. Similarly disconnect the connector. Then measure the insulation resistance.

(Figs. 3 and 4)

NOTE

Refer to Electric Wiring Diagram.

If the probe cannot enter the poles because the hole is too narrow then use a probe with a thinner pin.

Clip

Copper tube or metallic part

Insulation tester

Fig. 3

From fan motor, compressor and other parts

Probe Metallic part

Clip

Fig. 4

Insulation tester

45

11-2. Checking Continuity of Fuse on PCB Ass'y

Remove the PCB Ass'y from the electrical component box. Then pull out the fuse from the PCB

Ass'y. (Fig. 5)

Check for continuity using a multimeter as shown in

Fig. 6.

Fuse

PCB Ass'y

Fig. 5

Fuse

Fig. 6

46

12. REFRIGERANT R410A:

SPECIAL PRECAUTIONS WHEN SERVICING UNIT

12-1. Characteristics of New Refrigerant R410A

12-1-1. 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.

12-1-2. Components (mixing proportions)

HFC32 (50%) / HFC125 (50%)

12-1-3. 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.

CAUTION

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.

12-2. 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.

Flare tool for R410A

Specification A

Conventional flare tool (for R22)

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")

0 to 0.5 mm 1.2 mm

Size of flare

D

A

D

Spacer

A

Flare tool for R410A

47

Conventional flare tool (R22)

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.

48

12-3. Tools Specifically for R410A

For servicing, use the following tools for R410A

Tool Distinction

Tools specifically for R410A

Tools which can be commonly used for R22,

R407C, and R410A

Tool Name

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

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.

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")

12-4. 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

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

49

12-5. 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 "12-3. Tools

Specifically for R410A."

12-5-1. 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

Length of tubing

Evacuation time

Less than 10 meters

More than 10 minutes

More than 10 meters


(1) Recover refrigerant

OK

(2) Replace compressor

(3) Check for sealing

(4) Evacuation

(5) Recharge

OK

OK

OK

50

(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.

CAUTION

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

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.

CAUTION

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

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

Configuration and characteristics of cylinders

Valve

Charging cylinder

Open

Liquid

Single valve

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

Fig. 1

Liquid

Fig. 2

Fig. 3

Valve

Single valve (with siphon tube)

Charge with cylinder in normal position.

NO!

Liquid

Refrigerant cylinder

51

12-6. 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

Length of tubing

Evacuation time

Less than 10 meters


More than 10 meters


(1) Detect leaks

OK

(2) Recover refrigerant

OK

(3) Weld leaking points

(4) Check for sealing

(5) Evacuation

(6) Recharge

OK

OK

OK

(6) Recharging

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

52

12-7. Charging Additional Refrigerant

12-7-1. 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.

CAUTION

Never charge additional refrigerant if refrigerant is leaking from the unit. Follow instructions given in "12-6. In Case Refrigerant is Leaking" and completely carry out repairs. Only then should you recharge the refrigerant.

12-8. Retro-Fitting Existing Systems

12-8-1. 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.

12-8-2. 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.

53

APPENDIX INSTRUCTION MANUAL



(OI-852-6-4181-048-00-0)

54

OPERATING INSTRUCTIONS • INSTRUCCIONES DE USO

NOTICE D’UTILISATION • BEDIENUNGSANLEITUNG

ISTRUZIONI D’USO

This air conditioner uses the new refrigerant R410A

MCAF18 8 R5I

MCAF24 8 R5I

Save These Instructions • Guardéis estas instrucciones

Conserver ce notice d’utilisation • Bewahren Sie bitte diese Bedienungsanleitung auf

Conservate queste istruzioni

Split air conditioner system • Acondicionador de aire de consola partida sistema split

Climatiseurs split • Split-klimagerät • Condizionatore d’aria split system

Pub. OI-8526418 1

0 48

000 12 /20 07

01_MCAF188R5I_EN.fm Page 2 Friday, November 2, 2007 2:46 PM

Features

This air conditioner is an inverter type unit that automatically adjusts capability as appropriate. Details on these functions are provided below; refer to these descriptions when using the air conditioner.

• Microprocessor Controlled Operation

The interior compartment of the remote control unit contains several features to facilitate automatic operation, easy logically displayed for easy use.

• Simple One-touch Wireless Remote Control

The remote control unit has several features to facilitate automatic operation.

• 24-Hour ON or OFF Timer

This timer can be set to automatically turn the unit on or off at any time within a 24 hour period.

• 1-Hour OFF Timer

This timer can be set to automatically turn off the unit at any time after one hour.

• Night Setback

This function saves energy by controlling operation to provide a quieter operating sound than normal.

• Automatic and 3-step Fan Speed

Auto/High/Medium/Low

• Air Sweep Control

This function moves a flap up and down in the air outlet, directing air in a sweeping motion around the room and providing comfort in every corner.

• Auto. Flap Control

This automatically sets the flap to the optimum position during heating, cooling, and drying operation.

• Automatic Switching between Cooling and

Heating

When the remote control’s S/M switch is at the

“S” (Single) position

This unit automatically switches between cooling operation and heating operation according to the difference between the room temperature and the temperature setting.

When the remote control’s S/M switch is at the

“M” (Multiple) position

Unlike when the switch is at the “S” position as described above, the function for automatically switching between cooling and heating does not work.

• Hot Start Heating System

Right from the start, the air is warm and comfortable. This system prevents any cold blasts at the beginning while the heat pump is warming up, or even defrosting.

• Automatic Restart Function for Power Failure

Even when power failure occurs, preset programmed operation can be reactivated once power resumes.

• High Power Operation

If not in Auto Operation, the unit operates at maximum output for 30 minutes, regardless of the desired temperature.

The fan speed is 1 step above “High”.

• Quiet Operation

The fan rotates slower than the fan speed setting to provide a quieter operating sound.

• ION Operation

While it is operating, the unit generates negative ions that freshen up the air in the room.

• Anti-Mold Filter

This unit is equipped with an anti-mold filter that inhibits the growth of mold and bacteria.

• Air Clean Filter

An air filter that eliminates unpleasant odors and cleans the air is available.

Purchase a replacement filter at your local dealer.

(model

STK-FDXB

)

IMPORTANT

• “Single use” means that only one indoor unit is connected with one outdoor unit in a one-unit-toone-unit configuration and that the remote control's S/M switch is at the “S” (Single) position.

• “Multiple use” means that two or more indoor units are connected with one outdoor unit in a multiple-unit-to-one-unit configuration and that the remote control’s S/M switch is at the “M”

(Multiple) position. (Refer to “Using the Remote Control Unit” on page 10.)

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Contents

Page

Features ............................................................................................................ 2

Product Information........................................................................................... 3

Alert Symbols.................................................................................................... 3

Installation Location .......................................................................................... 4

Electrical Requirements .................................................................................... 4

Safety Instructions............................................................................................. 4

Names of Parts ................................................................................................. 5

Using the Remote Control Unit ....................................................................... 10

Operation with the Remote Control Unit ......................................................... 12

1. Automatic Operation .............................................................................. 12

2. Manual Operation .................................................................................. 13

3. Adjusting the Fan Speed........................................................................ 14

4. Fan Only................................................................................................. 14

5. Night Setback Mode............................................................................... 15

6. QUIET Mode .......................................................................................... 16

7. HIGH POWER Mode ............................................................................. 16

8. ION Mode............................................................................................... 16

Special Remarks............................................................................................. 17

Setting the Timer............................................................................................. 18

Using the 1-Hour OFF Timer .......................................................................... 20

Tips for Energy Saving .................................................................................... 20

Adjusting the Airflow Direction ........................................................................ 21

Operation without the Remote Control Unit .................................................... 22

Care and Cleaning .......................................................................................... 22

Troubleshooting............................................................................................... 25

Operating Range............................................................................................. 25

Product Information

If you have problems or questions concerning your Air Conditioner, you will need the following information. Model and serial numbers are on the nameplate on the bottom of the cabinet.

Model No. ______________________ Serial No. ____________________

Date of purchase ________________________________________________

Dealer’s address ________________________________________________

Phone number ________________

DECLARATION OF CONFORMITY

This product is marked « » as it satisfies EEC Directive No. 89/336/ EEC, 73/

23/EEC, 93/68/EEC and 92/31/EEC.

This declaration will become void in case of mis-usage and/or from non observance though partial of Manufacturer’s installation and/or operating instructions.

Alert Symbols

The following symbols used in this manual, alert you to potentially dangerous conditions to users, service personnel or the appliance:

CAUTION

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.

3


Installation Location

• We recommend that this air conditioner be installed properly by qualified installation technicians in accordance with the Installation

Instructions provided with the unit.

• Before installation, check that the voltage of the electric supply in your home or office is the same as the voltage shown on the nameplate.

• Do not install this air conditioner where there are fumes or flammable gases, or in an extremely humid space such as a greenhouse.

• Do not install the air conditioner where excessively high heatgenerating objects are placed.

Avoid:

To protect the air conditioner from heavy corrosion, avoid installing the outdoor unit where salty sea water can splash directly onto it or in sulphurous air near a spa.

Electrical Requirements

1.

All wiring must conform to the local electrical codes. Consult your dealer or a qualified electrician for details.

2.

Each unit must be properly grounded with a ground (or earth) wire or through the supply wiring.

3.

Wiring must be done by a qualified electrician.

Safety Instructions

• Read this Instruction Manual carefully before using this air conditioner. If you still have any difficulties or problems, consult your dealer for help.

• This air conditioner is designed to give you comfortable room conditions. Use this only for its intended purpose as described in this

Instruction Manual.

• Never use or store gasoline or other flammable vapor or liquid near the air conditioner — it is very dangerous.

• This air conditioner has no ventilator for intaking fresh air from outdoors. You must open doors or windows frequently when you use gas or oil heating appliances in the same room, which consume a lot of oxygen from the air. Otherwise there is a risk of suffocation in an extreme case.

CAUTION

• Do not turn the air conditioner on and off from the power mains switch. Use the ON/OFF operation button.

• Do not stick anything into the air outlet of the outdoor unit. This is dangerous because the fan is rotating at high speed.

• Do not let children play with the air conditioner.

• Do not cool or heat the room too much if babies or invalids are present.

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Names of Parts

Air intakes

INDOOR UNIT

Air outlet

Remote control unit

Drain hose

Refrigerant tubes

OUTDOOR UNIT

Air outlet

NOTE

This illustration is based on the external view of a standard model.

Consequently, the shape may differ from that of the air conditioner which you have selected.

This air conditioner consists of an indoor unit and an outdoor unit. You can control the air conditioner with the remote control unit.

Air Intake Air from the room is drawn into this section and passes through air filters which remove dust.

Air Outlet

Conditioned air is blown out of the air conditioner through the air outlet.

Remote Control Unit The wireless remote control unit controls power ON/OFF, operation mode selection, temperature, fan speed, timer setting, and air sweeping.

Refrigerant Tubes The indoor and outdoor units are connected by copper tubes through which refrigerant gas flows.

Drain Hose

Moisture in the room condenses and drains off through this hose.

Outdoor (Condensing) Unit The outdoor unit contains the compressor, fan motor, heat exchanger coil, and other electrical components.

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Unit Display and Operation Button

IMPORTANT

Avoid using radio equipment such as mobile phone near

(within 1 m) the remote control receiver. Some radio equipment may cause malfunction of the unit.

If the trouble happens, disconnect power and restart the air conditioner after a few minutes.

INDOOR UNIT

OPERATION lamp

TIMER lamp

QUIET lamp

ION lamp


REMOTE CONTROL receiver

REMOTE CONTROL receiver This section picks up infrared signals from the remote control unit

(transmitter).

OPERATION button When the remote control cannot be used, pressing this button enables heating and cooling operation.

Each time this button is pressed, the type of operation conducted is indicated by the changing color of the OPERATION lamp. Press the button and select the lamp color that suits your preference for operation.

Cooling operation

(green)

Heating operation

(red)

Stop

(lamp off)

OPERATION lamp This lamp lights when the system is in the continuous AUTO (red or green),

HEAT (red), DRY (orange), COOL (green) and FAN (green) mode (but no

FAN mode at M of the S/M switch on the remote control unit).

The OPERATION lamp lights up red and orange alternately when the system is defrosting.

TIMER lamp This lamp lights when the system is being controlled by the timer.

QUIET lamp This lamp lights during operation in the QUIET mode.

ION lamp This lamp lights during operation in ION mode while the indoor unit is operating.

NOTE The unit’s display lamps are dimmed during operation in the NIGHT

SETBACK mode.

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(1) Operation mode

AUTO .....................................

HEAT ......................................

MILD DRY ..............................

COOL .....................................

FAN ........................................

(2) Fan speed

Automatic operation ...............

HIGH .....................................

MEDIUM.................................

LOW .......................................

(3) Temperature setting

16 – 30 °C

When set to 28 °C temperature indication............

Displayed when the time display is set to

12-hour time.

Remote Control Unit (Display)

Displayed when transmitting data

Displayed when indoor unit sensor is in use

Displayed when setting temperature

Displayed when temperature is shown

Displayed when setting timer

Symbols

(4) Timer

24-hour clock with ON/OFF program Timer........................

ON Timer................................

OFF Timer. .............................

1-hour OFF Timer...................

(5) NIGHT SETBACK ..................

(6) Confirmation of transmission..

(7) Auto. flap indication ................

Flap angle indication ..............

Sweep indication ....................

(8) High power operation .............

(9) Quiet operation.......................

(10) ION operation.......................

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Transmitter


Sensor

8

Display

ION button

(Cover closed)


1 HR. TIMER button

Temperature setting buttons (TEMP.)

QUIET button

FAN SPEED selector button

FLAP button

ON TIME setting buttons

Advance button

Return button

CANCEL button

SENSOR button

MODE selector button

NIGHT SETBACK button

HIGH POWER button

Advance button

Return button

OFF TIME setting buttons

CLOCK button

Time display selector button

ADDRESS switch

ACL button

Temperature display selector button

NOTE The illustration above pictures the remote control unit after the cover has been opened.

Transmitter When you press the buttons on the remote control unit, the mark appears in the display to transmit the setting changes to the receiver in the air conditioner.

Sensor

A temperature sensor inside the remote control unit senses the room temperature.

Display

Information on the operating conditions is displayed while the remote control unit is switched on. If the unit is turned off, FLAP setting and FAN SPEED setting are not displayed.

ION button : This button is for turning the negative ions generated during operation on and off.


This button is for turning the air conditioner on and off.

1 HR. TIMER button

(1-HOUR OFF TIMER)

: When you press this button, regardless of whether the unit is operating or stopping, the unit operates for one hour and then shuts down.

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Remote Control Unit (continued)

Temperature setting buttons

(TEMP.)

Press the

Press the

button to increase the set temperature.

button to reduce the set temperature.

The temperature setting changes by 1 °C or 2 °F each time one of the TEMP. buttons is pressed.

QUIET button

: When you press this button, the fan rotates slower than the fan speed setting to provide a quieter operating sound.

MODE selector button

Use this button to select AUTO, HEAT, DRY, COOL or FAN mode.

(AUTO)

: When this setting is selected, the air conditioner calculates the difference between the thermostat setting and the room temperature and automatically switches to the ‘‘COOL’’ or ‘‘HEAT’’ mode as appropriate except at “M” of the Single/Multiple switch.

(HEAT)

(DRY)

: The air conditioner makes the room warmer.

: The air conditioner reduces the humidity in the room.

(COOL)

(FAN)

: The air conditioner makes the room cooler.

: The air conditioner works only as a circulation fan except at “M” of the

Single/Multiple switch.

FAN SPEED selector button

: The air conditioner automatically decides the fan speeds.

: High fan speed

: Medium fan speed

: Low fan speed

NIGHT SETBACK button

For details, see “5. Night Setback Mode”. When you press this button in the

HEAT, DRY or COOL mode, the mark appears in the display, and the remote control unit will automatically adjust the set temperature to save energy.

FLAP button

Press this button either to select the setting of the airflow direction to the auto. flap in each mode or one of the six possible positions manually or to select the sweep function which moves the flap up and down automatically.

: Auto flap setting: If selected in a heating operation, the flap is set to position (3) in the following chart. If selected in a cooling or dry operation, the flap is set at position (7) in the following chart.

: The airflow direction can be set manually. (six positions)

: The flap moves up and down automatically.

NOTE When you press the FLAP button, the air flow direction will be changed one by one as follows.

SWEEP

HIGH POWER button

ON TIME/OFF TIME setting buttons

: If this button is pressed during HEAT, DRY, COOL or FAN operation, the unit operates at maximum output for 30 minutes, regardless of the desired temperature.

The fan speed is 1step above ‘‘HIGH’’.

No display: The timer does not operate.

: The air conditioner starts at the set time.

: The air conditioner stops at the set time.

: The air conditioner stops and starts, or starts and stops, at the set times every day. For details, see “Setting the Timer”.

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Remote Control Unit (continued)

SENSOR button

When you press this button (use a small-tipped object such as a ballpoint pen), the mark will appear at the display. And the room temperature is detected by the sensor which is built into the indoor unit and the air conditioner is controlled accordingly.

NOTE If the remote control is located near a heat source, such as a space heater or in direct sunlight, press the SENSOR button to switch to the sensor on the indoor unit.

Temperature Display Selector button

This switches the temperature display between °C and °F.

Time Display Selector button This switches the time display between 24-hour time and 12-hour time.

ACL button (ALL CLEAR)

Puts the remote control unit into pre-operation status. Always press this button after replacing the batteries and setting the S/M switch.

ADDRESS switch

• The address switch changes to prevent mixing of signals from remote control units when two air conditioners are installed next to each other.

Normally, the address switch is set to A. For more information, please contact the dealer where you made the purchase.

• Normally, the tabs on the remote control unit should not be bent.

S/M (Single/Multiple switch) • Initially, the S/M switch is set to S (Single).

• Set this switch to M (Multiple) for multiple operation.

• Always press ACL button by a thin object such as the tip of a pen after setting the S/M switch.

NOTE When multiple indoor units are used and units in other rooms are already operating, they will be set to the same mode of operation as the operating indoor units.

NOTE The remote control unit sends the temperature signal to the air conditioner regularly at five minute intervals. If the signal from the remote control unit stops for more than 15 minutes due to the loss of the remote control unit or other trouble, the air conditioner will switch to the temperature sensor which is built into the indoor unit and control the room temperature. In these cases, the temperature around the remote control unit may differ from the temperature detected at the air conditioner’s position.

Using the Remote Control Unit

How to Install Batteries

1.

Slide the cover in the direction indicated by the arrow and remove it.

2.

Install two AAA alkaline batteries.

Make sure the batteries point in the direction marked in the battery compartment.

3.

Use a thin object such as the tip of a pen to press the ACL button.

ACL button

NOTE • The batteries last about six months, depending on how much you use the remote control unit. Replace the batteries when the remote control unit’s display fails to light, or when the remote control cannot be used to change the air conditioner’s settings.

• Use two fresh leak-proof type-AAA alkaline batteries.

• In replacing batteries, follow the instructions as mentioned in the sub-section “How to Install Batteries”.

• If you do not use the remote control unit more than 1 month, take out the batteries.

OI-048-10-EG 10


Using the Remote Control Unit (continued)

How to Use the Remote

Control Unit

When using the remote control unit, always point the unit’s transmitter head directly at the air conditioner’s receiver.

Air conditioner

(Indoor unit)

Remote control unit

Receiver

(Transmitter head)


Installation Position

The remote control unit may be operated either from a non-fixed position or from a wall-mounted position. To ensure that the air conditioner operates correctly, DO NOT install the remote control unit in the following places:

DO NOT

• In direct sunlight

• Behind a curtain or other places where it is covered

• More than 8 m away from the air conditioner

• In the path of the air conditioner’s airstream

• Where it may become extremely hot or cold

• Where it may be subject to electrical or magnetic noise

• Where there is an obstacle between the remote control unit and air conditioner (since a check signal is sent from the remote control unit every

5 minutes)

Mounting the Remote Control

Unit

Before mounting the remote control unit, press the ON/OFF operation button at the mounting location to make sure that the air conditioner operates from that location. The indoor unit should make a beeping sound to indicate that it has received the signal.

Remote control unit mount

Rear side

Press

Mounting screws

4 x 16 (included)

When Holding the Remote

Control Unit

Set in place

Hole

• To prevent loss of the remote control unit, you can connect the remote control unit to the mount by passing a string through the remote control unit and attachment hole.

To take out the remote control unit, pull it forward.

• When using the remote control unit and during air conditioner operation, the transmitter on the remote control unit should be pointed toward the receiver on the indoor unit.

• Make sure that there are no objects between the remote control unit and receiver which could block the signal.

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1. Automatic Operation

Operation with the Remote Control

Unit

When the remote control’s S/M switch is at the “S” (Single) position

This unit automatically switches between cooling operation and heating operation according to the difference between the room temperature and the temperature setting.

When the remote control’s S/M switch is at the “M” (Multiple) position

Unlike when the switch is at the “S” position as described above, the function for automatically switching between cooling and heating does not work.

STEP 2

STEP 1

NOTE Check that the circuit breaker on the power panel is turned on.

Once mode is selected and the unit is preset by following the steps below, you can have the air conditioner automatically bring the room to the desired temperature simply by pressing the ON/OFF operation button.

STEP 1

STEP 2

Press the MODE selector button to

Press the ON/OFF operation button.

.

NOTE

To stop the air conditioner, press the ON/OFF operation button again.

• To change the temperature setting; press the temperature setting buttons and change the setting to the desired temperature.

12 OI-048-12-EG


Operation with the Remote Control Unit (continued)

2. Manual Operation

OI-048-13-EG

STEP 2

STEP 3

STEP 1

STEP 4

STEP 5

NOTE Check that the circuit breaker on the power panel is turned on.

If the automatic operation settings of the unit do not meet your needs, press the setting buttons as described below and change the settings as desired.

STEP 1

STEP 2

STEP 3

Press the MODE selector button and select the desired mode.

For heating operation

For dehumidifying operation

For cooling operation

For fan only operation

→

→

→

→

(No FAN mode at M of the S/M switch on the remote control unit.)

To start the air conditioner, press the ON/OFF operation button.

Press the TEMP. setting buttons to change the temperature setting to the desired temperature.

Adjustable temperature range:

30 °C max.

16 °C min.

or 86 °F max.

60 °F min.

STEP 4

STEP 5

Set the FAN SPEED selector button to the setting you want.

Press the FLAP button and set the airflow direction as desired.

(Refer to “Adjusting the Airflow Direction” on page 21.)

To stop the air conditioner, press the ON/OFF operation button again.

13


NOTE


• Choose the best position in the room for the remote control unit, which also acts as the sensor for room comfort and transmits the operating instructions. Once you’ve found this best position, always keep the remote control unit there.

• This appliance has a built-in 5-minute time delay circuit to ensure reliable operation. When the operation button is pressed, the compressor will start running within three minutes. In the event of power failure, the unit will stop.

3. Adjusting the Fan Speed

A. Automatic fan speed

B. Manual fan speed

Simply set the FAN SPEED selector button to the position.

This automatically sets the best fan speed for the room temperature.

If you want to adjust fan speed manually during operation, just set the FAN

SPEED selector button as desired. [ , , or ]

4. Fan Only

STEP 2

STEP 1

STEP 3

If you want to circulate air without any temperature control, follow these steps:

STEP 1 Press the MODE selector button to switch to the fan mode

.

STEP 2

STEP 3

Press the ON/OFF operation button.

Press the FAN SPEED selector button to select the fan speed of your choice ( , or ).

NOTE There is no FAN only function at M of the S/M switch on the remote control unit.

14 OI-048-14-EG


5. Night Setback Mode


Night Setback Mode is used for saving energy.

Press the NIGHT SETBACK button while operation.

The mark appears in the display.

To release the night setback function, press the NIGHT SETBACK button again.

A. In Cooling and DRY

Mode: ( and ) When the night setback mode is selected, the air conditioner automatically raises the temperature setting 1 °C when 30 minutes have passed after the selection was made, and then another 1 °C after another 30 minutes have passed, regardless of the indoor temperature when night setback was selected. This enables you to save energy without sacrificing comfort. This function is convenient when gentle cooling is needed.

1 °C (2 °F)


1 °C (2 °F)

Press the NIGHT

SETBACK button

30 min.

30 min. Time

B. In Heating Mode: ( )

When the night setback mode is selected, the air conditioner automatically lowers the temperature setting 2 °C when 30 minutes have passed after the selection was made, and then another 2 °C after another 30 minutes have passed, regardless of the indoor temperature when night setback was selected. This enables you to save energy without sacrificing comfort. This function is convenient when gentle heating is needed.


2 °C (4 °F)

2 °C (4 °F)

Press the NIGHT

SETBACK button

30 min.

30 min.

Time

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6. QUIET Mode


QUIET Mode is used to reduce the fan sound of the indoor unit.

Press the QUIET button.


To cancel, press QUIET button again.

• In QUIET Mode, the fan rotates at a slower speed than the fan speed setting.

• If the unit is already operating with a very low airflow, the fan sound may not change even if the QUIET button is pressed.

7. HIGH POWER Mode

8. ION Mode

HIGH POWER mode can be used to increase the output of the indoor unit for all operation modes except automatic operation.

Press the HIGH POWER button.


To cancel, press HIGH POWER button again.

• When the HIGH POWER button is pressed, the unit operates at maximum output for 30 minutes, regardless of the desired temperature. The fan speed is 1 step above “High”.

• HIGH POWER Mode cannot be used when the operation mode is

Automatic Operation.

• QUIET Mode and HIGH POWER Mode cannot be used at the same time.

NOTE • When set to High fan speed during heating operation, the fan runs at High fan speed even though the mark is displayed.

• Depending on the operating conditions, the fan speed may be increased by a small amount only.

The ION mode is used during operation to generate negative ions that freshen up the air in the room.

Press the ION button.


To cancel, press ION button again.

• The indoor unit’s ION lamp lights up while negative ions are being generated.

• ION “on” is the remote control unit’s initial setting.

• The negative ions are generated from the negative ion generator.

16 OI-048-16-EG


Special Remarks

‘‘DRY’’ ( ) Operation

How it works?

• Once the room temperature reaches the level that was set, the unit’s operation frequency is changed automatically.

• During DRY operation, the fan speed automatically runs at lower speed for providing a comfortable breeze.

• ‘‘DRY’’ operation is not possible if the indoor temperature is 15 °C or less.

Heating ( ) Operation

Heating performance • Because this air conditioner heats a room by drawing in the heat of the outside air (heat pump system), the heating efficiency will fall off when the outdoor temperature is very low. If sufficient heat cannot be obtained with this air conditioner, use another heating appliance together with it.

Defrosting

• When the outdoor temperature is low, frost or ice may form on the heat exchanger coil, reducing heating performance. When this happens, a microcomputer defrosting system operates. At the same time, the fan on the indoor unit stops and the OPERATION lamp lights red and orange alternately until defrosting is completed. Heating operation restarts after several minutes. (This interval will vary slightly depending upon the outdoor temperature and the way in which frost forms.)

Cold draft prevention

• For several minutes after the start of heating operation, the indoor fan runs at a lower speed until the indoor heat exchanger coil has warmed up sufficiently. However, the fan may remain stopped when the room temperature is low. This is because the COLD DRAFT PREVENTION

SYSTEM is in operation.

Cooling ( ) Operation

• Sometimes the indoor unit may not get to the set fan speed such as LOW and QUIET under cool operation at very low outdoor temperatures due to the indoor unit being protected from ice or frost.

Power failure during operation

• In the event of power failure, the unit will stop. When the power is resumed, the unit will restart automatically within 5 minutes or 15 minutes at M position of the S/M switch on AUTO mode by the remote control unit.

Clicking Sound

Clicking sound is heard from the air conditioner

• In heating or cooling operation, any plastic parts may expand or shrink due to a sudden temperature change. In this event, a clicking sound may occur.

This is normal, and the sound will soon disappear.


• The remote control unit sends the setting condition signals to the air conditioner regularly at five minute intervals.

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Setting the Timer

NOTE

1. How to set the present time

In the descriptions below, the following settings are used for the temperature and time indicator selector button on the bottom front section of the remote control.

• Temperature: °C

• Time: AM, PM

(Example) To set to 10:30 pm.

Operation

1.

Press the CLOCK button once if the time indicator is not flashing.

Indication

The time indication alone flashes.

2.

Press the Advance, Return ( ,

) button until PM 10:30 is displayed.

The time can be set in 1-minute increments. Holding down the button advances the time rapidly in

10-minute increments.

3.

Press the CLOCK button again.

This completes the setting of the current time.

2. How to set the OFF time

(Example) To stop the air conditioner at 11:00 am.

1.

Press the OFF TIME setting button once.

2.


) button until AM 11:00 is displayed.

3.

Wait a few seconds, and then the setting is complete.

The timer indication is displayed, and the present OFF time is shown.

The timer indication blinks.



The timer indication stops blinking and the present time is displayed.

18 OI-048-18-EG


3. How to set the ON time

Setting the Timer (continued)

(Example) To start operation at 7:10 am.

Operation

1.

Press the ON TIME setting button once.

2.


) button until AM 7:10 is displayed.

3.

Wait a few seconds, and then the setting is complete.

Indication

The timer indication is displayed, and the present ON time is shown.

The timer indication blinks.



The timer indication stops blinking and the present time is displayed.

4. How to set DAILY ON/OFF

REPEAT timer

(Example) To start operation at 7:10 am. and stop the air conditioner at 11:00 am.

10:30 pm.

Present time

7:10 am.

ON

11:00 am.

OFF

1.

Set the timer ON/OFF times as shown in 2-1, 2, 3 and 3-1, 2, 3.

The present time 10:30 pm. and

are displayed.

NOTE • The ON/OFF combination timer uses the current time as the reference, and it is activated starting from whichever set time comes first.

• With the ON/OFF combination timer, the settings are repeated every day.

• You can check the timer ON/OFF times after you have set them by pressing the ON TIME and OFF TIME setting buttons.

To cancel a timer program • Press the CANCEL button.

• When either an ON or OFF timer is to be canceled, press the button corresponding to the timer whose program is to be canceled, and then press the CANCEL button.

NOTE

• The airflow direction, fan speed and temperature setting can be changed after a timer program has been set even when the unit is stopped. Even when operation is stopped during an ON timer program, the unit will start operating when the set time is reached provided that the program is not canceled.

• When the ON timer and OFF timer are set to the same time, the timer operates as if it is turned off.

OI-048-19-EG 19


Using the 1-Hour OFF Timer

1. 1-Hour OFF Timer This function causes the unit to operate for one hour and then stop, regardless of whether the unit is on or off when this button is pressed.

The indicator in the display indicates that this function is operating.

Setting procedure:

Regardless of whether the unit is operating or stopped, press the 1 HR.

TIMER button.

appears in the display.

Cancellation procedure:

Press the ON/OFF operation button to turn the unit off, wait for the unit to stop operating, and then press the ON/OFF operation button again.

The 1-Hour Timer function is now cancelled and the unit operates normally.

NOTE • If, while the 1-Hour Timer function is operating, the 1HR. TIMER button is pressed once to cancel the function and then again, the unit continues to operate for one hour from that point in time and then stops.

• It is not possible to use the OFF Timer and 1-Hour OFF Timer together.

Whichever function is set last takes precedence. If the 1 HR. TIMER button is pressed while the TIMER OFF function operates, the OFF Timer is cancelled and the unit will stop operating one hour later.

2. Operation together with the

DAILY ON/OFF REPEAT Timer

The 1-Hour OFF Timer setting is given priority over the DAILY ON/OFF

REPEAT setting.

Tips for Energy Saving

Do not • Block the air intake and outlet of the unit. If they are obstructed, the unit will not work well, and may be damaged.

• Let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls and ceiling of the room are warmed by the sun, it will take longer to cool the room.

Do

• Always try to keep the air filter clean. (Refer to “Care and Cleaning”.) A clogged filter will impair the performance of the unit.

• To prevent conditioned air from escaping, keep windows, doors and any other openings closed.

20 OI-048-20-EG


Adjusting the Airflow Direction

1. Horizontal

The horizontal airflow can be adjusted by moving the vertical vanes with your hands to the left or right.

CAUTION

When the humidity is high, the vertical vanes should be in the front position during the cooling or dehumidifying operation. If the vertical vanes are positioned all of the way to the right or left, condensation may begin to form around the air vent and drip down.

2. Vertical

The vertical airflow can be adjusted by moving the flap with the remote control unit. Do not move the flap with your hands. Confirm that the remote control unit has been turned on. Use the FLAP button to set either the sweep function or one of the six airflow direction settings.

COOL

DRY

FAN

SWEEP

SWEEP

HEAT

A. Sweep function

The flap starts moving up and down to deliver air over the sweep range.

C. Auto flap function

The flap is set to the recommended position.

B. Setting the airflow manually

Referring to the above illustration, use the

FLAP button to set the airflow direction within the range used during the heating, cooling, or dehumidifying operation.

NOTE

CAUTION

• The flap automatically closes when the unit is off.

• During the heating operation, the fan speed will be very low and the flap will be in the horizontal position (position ) until the air being blown out of the unit begins to warm. Once the air warms up, the flap position and fan speed change to the settings specified with the remote control.

• Use the FLAP button on the remote control to adjust the position of the flap. If you move the flap by hand, the flap position according to the remote control and the actual flap position may no longer match.

If this should happen, shut off the unit, wait for the flap to close, and then turn on the unit again; the flap position will now be normal again.

• Do not have the flap pointed down during cooling operation.

Condensation may begin to form around the air vent and drip down.

OI-048-21-EG 21


Operation without the Remote

Control Unit

INDOOR UNIT


If you have lost the remote control unit or it has trouble, follow the steps below.

When the air conditioner is not running

Each time the OPERATION button is pressed, the type of operation conducted is indicated by the changing color of the OPERATION lamp. Press the button and select the lamp color that suits your preference for operation.

Cooling operation

(green)

Heating operation

(red)

Stop

(lamp off)

NOTE The temperature is set to the room temperature minus 2°C during the cooling operation and to the room temperature plus 2°C during the heating operation, and the fan speed and flap are set to Auto.

Care and Cleaning

1. For safety, be sure to turn the air conditioner off and also to disconnect the power before cleaning.

2. Do not pour water on the indoor unit to clean it. This will damage the internal components and cause an electric shock hazard.

Casing and Grille (Indoor Unit) Clean the casing and grille of the indoor unit with a vacuum cleaner brush, or wipe them with a clean, soft cloth.

If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When cleaning the grille, be careful not to force the vanes out of place.

CAUTION

1. Never use solvents, or harsh chemicals when cleaning the indoor unit. Do not wipe the plastic casing using very hot water.

2. Some metal edges and the fins are sharp and may cause injury if handled improperly; be especially careful when you clean these parts.

3. The internal coil and other components of the outdoor unit must be cleaned every year. Consult your dealer or service center.

22 OI-048-22-EG


Care and Cleaning (continued)

Anti-Mold Filter

The anti-mold filter behind the air intake grille should be checked and cleaned at least once every two weeks.

How to remove the anti-mold filter

1.

Grasp both ends of the air intake grille, and remove it by opening towards the front and pulling towards you.

Air intake grille

2.

Remove the anti-mold filter attached to the rear of the air intake grille.

Anti-mold filter

Cleaning Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter, wash the filter in lukewarm, soapy water, rinse it in clean water, and dry it.

How to replace the anti-mold filter

1.

With the FRONT mark of the anti-mold filter at the front, align the two indentions near the mark with the hooks at the rear of the air intake grille, and then mount the anti-mold filter.

Anti-mold filter

FRONT mark

Hook

2.

Allow the edge of the air intake grille to slide into the top of the indoor unit, and then insert it all the way inside.

Groove


Pin

OI-048-23-EG

3.

To attach the air intake grille to the indoor unit, press its bottom right and left corners as well as its bottom center into place.


NOTE Attach so that the round pins at the top right and left corners of the air intake grille are inserted into the grooves at the top right and left of the indoor unit.

23


Care and Cleaning (continued)

Air Clean Filter

The air clean filter removes dust and dirt from the air, and reduces odors and smoke from tobacco.

This air clean filter cannot remove harmful gases or vapors nor ventilate air in the room. You must open doors or windows frequently when you use gas or oil heating appliances. Otherwise there is a risk of suffocation in extreme cases.

How to install the air clean filter

The air clean filter needs to be installed behind the air intake grille.

1.

Remove the air intake grille.

2.

Install the air clean filter in the position shown in the figure.

3.

Remount the air intake grille.

Air clean filter

How to clean the air clean filter

• In general, the filter should be sucked to remove dust in low fan speed of a vacuum cleaner once every three months.

• If there is heavily grime on the filter, soak the filter in lukewarm water with neutral detergent diluted 1:500 for 1 to 2 minutes then wash it.

• Rinse the filter in clean water, then let it dry on the towel in room temperature.

NOTE • Do not bend nor give excessive force onto the air clean filter.

• If the filter surface is heavily blocked with dirt or damaged, replace it with new one. Purchase a replacement filter at your local dealer. (model

STK-FDXB

)

Cleaning the main unit and remote control unit

•

•

Wipe clean using a soft, dry cloth.

To remove stubborn dirt, moisten a cloth in warm water no hotter than

40 °C, wring thoroughly, and then wipe.

• The air intake grille can be removed in order to wash it with water.

Removing and remounting the air intake grille

Refer to “How to remove the anti-mold filter” and “How to replace the antimold filter” on page 23.

When using a footstool or the like, be careful not to let it tip over.

CAUTION

Washing the grille with water

• Clean the grille gently using a soft sponge, or the like. Then wipe away any remaining moisture.

• Neutral detergent may be used to remove stubborn dirt. Then rinse thoroughly with water and wipe away any remaining moisture.

Cleaning the negative ion generator

Follow the steps below when the generator has become dirty.

For safety, be sure to turn the air conditioner off and also to disconnect the power before cleaning.

NOTE

Remove the dust on the negative ion generator.

• Use a toothbrush, etc. to dust off the end.

• Use a cotton swab, etc., to clean around the generator inside the plastic case, taking care not to touch the electrodes.

Negative ion generator

(metal electrodes inside plastic case)

• During use, the negative ion generator and other metal parts may become discolored: this is normal and not indicative of malfunctioning.

• If the dirt on and around the negative ion generator is left to build up, a puffing or sputtering sound will eventually be heard. In this case, clean the generator immediately.

• Do not apply excessive force while performing maintenance.

24 OI-048-24-EG


Troubleshooting

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or service center.

Air conditioner does not run at all.

1. Power failure.

2. Leakage circuit breaker tripped.

3. Line voltage is too low.

4. Batteries in remote control unit have run down.

Trouble in system.

1. Restore power.

2. Contact service center.

3. Consult your electrician or dealer.

4. Replace batteries.

OPERATION lamp blinks and air conditioner does not operate.

Compressor runs but soon stops.

Poor cooling (or heating) performance.

Clicking sound is heard from the air conditioner.

OPERATION lamp lights but outdoor unit will not run.

Contact service center.

Obstruction in front of condenser coil.

Remove obstruction.

1. Dirty or clogged air filter.

1. Clean air filter to improve airflow.

2. Heat source or many people in room.

2. Eliminate heat source if possible.

3. Doors and/or windows are open.

3. Shut them to keep the heat (or cold) out.

4. Remove it to ensure good airflow.

4. Obstacle near air intake or air discharge port.

5. Thermostat is set too high for cooling (or too low for heating).

6. (Outdoor temperature is too low for heating.)

5. Set the temperature lower (or higher).

6. (Consult your dealer or try to use another heat appliance.)

This is normal, and the sound will soon disappear.

In heating or cooling operation, any plastic parts may expand or shrink due to a sudden temperature change.

In this event, a clicking sound may occur.

The use of cellular phones near the air conditioner may cause disturbance to its normal operation.

1. Turn off the power then restart the air conditioner after a while.

2. Consult your dealer.

Operating Range

The air conditioner is operable within the temperature ranges as listed below:

Temperature Indoor air temperature Outdoor air temperature

COOLING

HEATING

Max.

Min.

Max.

Min.

32 °C DB / 23 °C WB

19 °C DB / 14 °C WB

27 °C DB

16 °C DB

43 °C DB

For Single use –15 °C DB

For Multiple use 19 °C DB

24 °C DB / 18 °C WB

– DB/ –15 °C WB

OI-048-25-EG 25

R.D. 28 Reyrieux BP 131 - 01601 Trevoux CEDEX France

Tel. (33) 04.74.00.92.92 - Fax (33) 04.74.00.42.00

http://www.technibel.com

Technibel GRF246R5IAA UnitÃ©s extÃ©rieures monosplit air-air Service Manual 80 Pages

Technibel GRF246R5IAA UnitÃ©s extÃ©rieures monosplit air-air Service Manual

TECHNICAL &

SERVICE MANUAL

MCAF188R5I + GRF186R5I

MCAF248R5I + GRF246R5I

FILE NO.

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Indoor Unit Outdoor Unit

MCAF188R5I

MCAF248R5I

GRF186R5I

GRF246R5I

RoHS

WARNING

Important!

Please Read Before Starting

If Necessary, Get Help

SPECIAL PRECAUTIONS

When Wiring

When Transporting

When Installing

When Connecting Refrigerant Tubing

When Servicing

Others

Table of Contents

1. OPERATING RANGE

2. SPECIFICATIONS

3. DIMENSIONAL DATA

4. REFRIGERANT FLOW DIAGRAM

5. PERFORMANCE DATA

6. ELECTRICAL DATA

7. INSTALLATION INSTRUCTIONS

8. MAINTENANCE

9. FUNCTIONS

10. TROUBLESHOOTING

11. CHECKING ELECTRICAL COMPONENTS

12. REFRIGERANT R410A:

SPECIAL PRECAUTIONS WHEN SERVICING UNIT

APPENDIX INSTRUCTION MANUAL

1. OPERATING RANGE

2. SPECIFICATIONS

2-1. Unit Specifications

2-2. Major Component Specifications

2-2-1. Indoor Unit

2-2-2. Outdoor Unit

2-3. Other Component Specifications

3. DIMENSIONAL DATA

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Insulation of Refrigerant Tubing

5. PERFORMANCE DATA

5-1. Temperature Charts

5-2. Air Throw Distance Charts

6. ELECTRICAL DATA

6-1. Electrical Characteristics

6-2. Electric Wiring Diagrams

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

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

7. INSTALLATION INSTRUCTIONS

7-1. Installation Site Selection

7-1-1. Indoor Unit

7-1-2. Outdoor Unit

×

×

7-2. Recommended Wire Length and Diameter

7-3. Remote Control Unit Installation Position

7-3-1. Mounting on a Wall

7-4. How to Test Run the Air Conditioner

7-5. Remove the Grille to Install the

Indoor Unit

8. MAINTENANCE

8-1. Address Setting of the Remote

Control Unit

8-2. Disconnecting and Connecting Positive Connector for Outdoor Unit

9. FUNCTIONS

9-1. Operation Functions

Emergency operation

AUTO cooling/heating operation

SENSOR DRY