Mitsubishi FDCVA302HENR, FDTCA151R, FDTA151R, FDTVA302HEN1R, FDENVA302HEN1R User Manual

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PACKAGED AIR-CONDITIONER

(Split system, Air to air heat pump type)

CEILING RECESSED TYPE

FDTVA302HEN1R

Manual No. '06•PAC-T-109

CEILING SUSPENDED TYPE

FDENVA302HEN1R

SATELLITE DUCTED TYPE

FDUMVA302HEN2R

MULTI-TYPE (V-MULTI) PACKAGED AIR-CONDITIONER

(OUTDOOR UNIT)

FDCVA302HENR

(INDOOR UNIT)

FDTCA151R FDTA151R FDENA151R FDKNA151R

TABLE OF CONTENTS

1. PACKAGED AIR-CONDITIONER......................................................................................... 2

2. MULTI-TYPE (V MULTI) PACKAGED AIR-CONDITIONER ............................................ 122

3. WIRELESS KIT (OPTIONAL PARTS) .............................................................................. 190

1. PACKAGED AIR-CONDITIONER

CONTENTS

1.1 GENERAL INFORMATION ............................................................................... 4

1.1.1 Specific features .......................................................................................... 4

1.1.2 How to read the model name....................................................................... 4

1.2 SELECTION DATA ........................................................................................... 5

1.2.1 Specifications ............................................................................................... 5

(1) Ceiling recessed type (FDT) ......................................................................... 5

(2) Ceiling suspended type (FDEN) ................................................................... 6

(3) Satellite ducted type (FDUM)........................................................................ 7

1.2.2 Range of usage & limitations ....................................................................... 8

1.2.3 Exterior dimensions ..................................................................................... 9

(1) Indoor unit ..................................................................................................... 9

(2) Remote controller (Optional parts) ............................................................. 12

(3) Outdoor unit ................................................................................................ 14

1.2.4 Inside view ................................................................................................. 15

1.2.5 Exterior appearance .................................................................................. 16

1.2.6 Piping system ............................................................................................ 17

1.2.7 Selection chart ........................................................................................... 18

1.2.8 Characteristics of fan ................................................................................. 23

1.2.9 Noise level ................................................................................................. 23

(1) Indoor unit ................................................................................................... 23

(2) Outdoor unit ................................................................................................ 24

1.3 ELECTRICAL DATA ....................................................................................... 25

1.3.1 Electrical wiring .......................................................................................... 25

(1) Indoor unit ................................................................................................... 25

(2) Outdoor unit ................................................................................................ 28

1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER .................. 29

(1) Remote controller ....................................................................................... 29

(2) Operation control function by the indoor unit controller .............................. 31

(3) Operation control function by the wired remote controller .......................... 38

(4) Operation control function by the outdoor unit controller ............................ 39

1.5 APPLICATION DATA ...................................................................................... 49

1.5.1 Installation of indoor unit ........................................................................... 50

(1) Ceiling recessed type (FDT) ....................................................................... 50

(2) Ceiling suspended type (FDEN) ................................................................. 56

(3) Satellite ducted type (FDUM)...................................................................... 61

1.5.2 Installation of wired remote controller ....................................................... 68

1.5.3 Installation of outdoor unit ......................................................................... 69

(1) Installation................................................................................................... 69

(2) Refrigerant piping work ............................................................................... 71

(3) Air tightness test and air purge ................................................................... 72

(4) Refrigerant quantity .................................................................................... 73

(5) Drain piping work ........................................................................................ 73

(6) Electrical wiring ........................................................................................... 74

(7) Setting functions using the wired remote controller .................................... 76

(8) Checking operation data ............................................................................. 80

(9) Test run ....................................................................................................... 81

1.6 MAINTENANCE DATA ................................................................................... 82

1.6.1 Servicing ................................................................................................... 82

1.6.2 Trouble shooting for refrigerant circuit ....................................................... 83

1.6.3 Diagnosing of microcomputer circuit ......................................................... 84

(1) Selfdiagnosis function ................................................................................. 84

(2) Procedures of trouble diagnosis ................................................................. 87

(3) Error diagnosis procedures at the indoor unit side ..................................... 87

(4) Error diagnosis procedures at the outdoor unit side ................................. 104

(5)

Check method in the case of the failure display in the remote controller ..............

119

(6)

Check abnormal operation data with the wired remote controller .........................

120

1.6.4

Check display on wireless specification models (FDEN · FDT)....................

121

Example: FDT V A 30 2 H EN 1 R

1.1 GENERAL INFORMATION

1.1.1 Specific features

(1) A new refrigerant, R410A, which causes no damage to the earth’s ozone layer, is used. R410A is a pseudoazeotropic refrigerant, so

there is little formation of separate vapor and liquid layers, and it is possible to add refrigerant on-site.

(2) Less refrigerant charge amount due to use of double phase refrigerant flow system. The total refrigerant charge amount has been

reduced by more than 50%.

(3) The microcomputer chip is installed in the indoor unit and outdoor unit. There is no need for the unit to communicate between the

outdoor and indoor units so the unit is more resistant to electromagnetic noise thus the incidence of microcomputer malfunction

has been reduced. The compressor in the outdoor unit has its own self protection function, that reacts according to abnormal high

pressure and excessive high temperature.

(4) There are only three power lines between the outdoor and indoor unit. One cabtyre cable with 3 wires encased in one sheath is

enough for conducting the wiring work between the outdoor unit and the indoor unit. This contributes to simpler wiring work in the

field.

(5) All air supply ports have auto swing louvers. (Only case of FDT and FDEN models). The indoor fan motor has three speeds of

high, medium and low.

(6) All models have service valves protruding from the outdoor unit for faster flare connection work in the field.

(7) The size and weight of the outdoor units in the FDCVA 302 series have been greatly reduced. Use of an inverter has also improved

energy conservation and economy.

1.1.2 How to read the model name

RoHS specification

Applicable power source ... See the specifications

Heat pump type

Series No.

Product capacity

R410A models

V: Inverter specification

Model name

FDT :

FDEN :

FDUM

FDC :

Ceiling recessed type unit with wired remote controller

Ceiling suspended type unit with wireless remote controller

Satellite ducted type unit with wired remote controller

Outdoor unit

Item

Model

FDTA301R FDCVA302HENR

Nominal cooling capacity

(1)

kW 7.1[3.9~8.0]

Nominal heating capacity

(1)

kW 8.0[4.0~9.0]

Power source 1 Phase, 220/230/240V 50Hz

Cooling power consumption kW 1.90

Running current (Cooling) A 8.3

Power factor (Cooling) % 99

Heating power consumption kW 2.07

Running current (Heating) A 9.0

Power factor (Heating) % 99

Inrush current (L.R.A) A 5

Noise level dB(A)

35 52

Exterior dimensions

Unit 270 × 840 × 840

750 × 880 (+88) × 340

Height × Width × Depth Panel 30 × 950 × 950

Net weight kg 31 (Unit:24 Panel:7) 60

Refrigerant equipment

– 2YC45DXD  1

Compressor type & Q’ty

Starting method – Direct line start

Heat exchanger Louver fin & inner grooved tubing Straight fin & inner grooved tubing

Refrigerant control – Electronic expansion valve

Refrigerant R410A

Quantity kg –

2.95 [Pre-charged up to the piping length of 30m]

Refrigerant oil r – 0.65 (FVC50K)

Defrost control Microcomputer controlled de-icer

Air handling equipment

Fan type & Q’ty

Turbo fan × 1 Propeller fan × 1

Motor W 20 × 1 120 × 1

Starting method Direct line start

Air flow CMM Cooling:60 Heating:48.5

Outside air intake Available –

Air filter, Q’ty Long life filter ×1(washable) –

Shock & vibration absorber Rubber sleeve (for fan motor) Rubber mount (for compressor)

Electric heater W – 20 (Crank case heater)

Operation control Wired remote control switch (Optional : RC-E1R)

Operation switch

Wireless remote control switch (Optional : RCN-T-35W-ER)

– (Indoor unit side)

Room temperature control Thermostat by electronics –

Safety equipment Internal thermostat for fan motor. Internal thermostat for fan motor.

Frost protection thermostat. Abnormal discharge temperature protection.

Installation data mm

Liquid line: φ9.52 (3/8″) Gas line: φ15.88 (5/8″)

Refrigerant piping size (in)

Connecting method Flare piping

Drain hose Connectable with VP25 (I.D.25mm, O.D.32mm) –

Insulation for piping Necessary (both Liquid & Gas lines)

Accessories Mounting kit. Drain hose

Optional parts Decorative Panel

Operation data

(3)

(2) This packaged air-conditioner is manufactured and tested in conformity with the following standard. ISO-T1 “UNITARY AIR-CONDITIONERS”

(3) The operation data indicate when the air-conditioner is operated at 230V 50Hz.

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27˚C 19˚C 35˚C 24˚C

Heating 20˚C – 7˚C 6˚C

ISO-T1

FDTVA302HEN1R

Model FDTVA302HEN1R

Powerful mode Hi:38 Me:35 Lo:33

Mild mode Hi:35 Me:33 Lo:31

Powerful mode Hi:20 Me:17 Lo:15

Mild mode Hi:17 Me:15 Lo:13

(1) Ceiling recessed type (FDT)

1.2 SELECTION DATA

1.2.1 Specifications

Item

Model

FDENA301R FDCVA302HENR

Nominal cooling capacity

(1)

kW 7.1[3.5~8.0]

Nominal heating capacity

(1)

kW 8.0[4.0~9.0]

Power source 1 Phase, 220/230/240V 50Hz

Cooling power consumption kW 2.06

Running current (Cooling) A 9.1

Power factor (Cooling) % 98

Heating power consumption kW 2.21

Running current (Heating) A 9.8

Power factor (Heating) % 98

Inrush current (L.R.A) A 5

Noise level dB(A)

Exterior dimensions

mm 210 × 1320 × 690 750 × 880 (+88) × 340

Height × Width × Depth

Net weight kg 36 60

Refrigerant equipment

– 2YC45DXD  1

Compressor type & Q’ty

Starting method – Direct line start

Heat exchanger Louver fin & inner grooved tubing Straight fin & inner grooved tubing

Refrigerant control – Electronic expansion valve

Refrigerant R410A

Quantity kg –

2.95 [Pre-charged up to the piping length of 30m]

Refrigerant oil r – 0.65 (FVC50K)

Defrost control Microcomputer controlled de-icer

Air handling equipment

Fan type & Q’ty

Multiblade centrifugal fan × 4 Propeller fan × 1

Motor W 25 × 2 120 × 1

Starting method Direct line start

Air flow CMM Cooling:60 Heating:48.5

Outside air intake Unavailable –

Air filter, Q’ty Polypropylene net ×2(washable) –

Shock & vibration absorber Rubber sleeve (for fan motor) Rubber mount (for compressor)

Electric heater W – 20 (Crank case heater)

Operation control

Wireless remote control switch (Optional: RCN-E1R)

Operation switch Wired remote control switch (Optional: RC-E1R)

– (Indoor unit side)

Room temperature control Thermostat by electronics –

Safety equipment Internal thermostat for fan motor. Internal thermostat for fan motor.

Frost protection thermostat. Abnormal discharge temperature protection.

Installation data mm

Liquid line: φ9.52 (3/8″) Gas line: φ15.88 (5/8″)

Refrigerant piping size (in)

Connecting method Flare piping

Drain hose Connectable with VP20 (I.D.20mm, O.D.26mm) –

Insulation for piping Necessary (both Liquid & Gas lines)

Accessories Mounting kit. Drain hose

Optional parts –

Model FDENVA302HEN1R

Operation data

(3)

(2) This packaged air-conditioner is manufactured and tested in conformity with the following standard. ISO-T1 “UNITARY AIR-CONDITIONERS”

(3) The operation data indicate when the air-conditioner is operated at 230V 50Hz.

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27˚C 19˚C 35˚C 24˚C

Heating 20˚C – 7˚C 6˚C

ISO-T1

FDENVA302HEN1R-SB

Powerful mode Hi:44 Me:41 Lo:39

Mild mode Hi:41 Me:39 Lo:38

Powerful mode Hi:20 Me:18 Lo:14

Mild mode Hi:18 Me:14 Lo:12

(2) Ceiling suspended type (FDEN)

Model FDUMVA302HEN2R

Item

Model

FDUMA302R FDCVA302HENR

Nominal cooling capacity

(1)

kW 7.1[3.5~8.0]

Nominal heating capacity

(1)

kW 8.0[4.0~9.0]

Power source 1 Phase, 220/230/240V, 50Hz

Cooling power consumption kW 2.08

Running current (Cooling) A 9.2

Power factor (Cooling) % 98

Heating power consumption kW 2.21

Running current (Heating) A 10.2

Power factor (Heating) % 94

Inrush current (L.R.A) A 5

Noise level dB(A) Hi:35 Me:32 Lo:29

Exterior dimensions

mm 299 × 950 × 635 750× 880 (+88)× 340

Height × Width × Depth

Net weight kg 40 60

Refrigerant equipment

–

2YC45DXD × 1

Compressor type & Q’ty

Starting method – Direct line start

Heat exchanger Louver fin & inner grooved tubing Straight fin & inner grooved tubing

Refrigerant control – Electronic expansion valve

Refrigerant R410A

Quantity kg –

2.95 [Pre-charged up to the piping length of 30m]

Refrigerant oil r – 0.48 (BR68A)

Defrost control Microcomputer controlled de-icer

Air handling equipment

Fan type & Q’ty

Multiblade centrifugal fan × 2 Propeller fan × 1

Motor W 100 × 1 120 × 1

Starting method Direct line start

Air flow CMM Hi: 20 Me:18 Lo:15 Cooling:60 Heating:48.5

Available static pressure

Pa Standard: 50, Max: 85 –

Outside air intake – –

Air filter, Q’ty – –

Shock & vibration absorber Rubber sleeve (for fan motor) Rubber mount (for compressor)

Electric heater W – 20(Crank case heater)

Operation control Wired remote control switch (Optional: RC-E1R)

Operation switch Wireless kit (Optional: RCND-KIT-HER)

– (Indoor unit side)

Room temperature control Thermostat by electronics –

Safety equipment Internal thermostat for fan motor. Internal thermostat for fan motor.

Frost protection thermostat. Abnormal discharge temperature protection.

Installation data mm

Liquid line: φ9.52 (3/8″) Gas line: φ15.88 (5/8″)

Refrigerant piping size (in)

Connecting method Flare piping

Drain hose Connectable with VP25 (I.D.25mm, O.D.32mm) –

Insulation for piping Necessary (both Liquid & Gas lines)

Accessories Mounting kit. Drain hose

Optional parts Filter kit (UM-FL2E)

(2) This packaged air-conditioner is manufactured and tested in conformity with the following standard.

ISO-T1 “UNITARY AIR-CONDITIONERS”

(3) The operation data indicate when the air-conditioner is operated at 230V 50Hz.

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27˚C 19˚C 35˚C 24˚C

Heating 20˚C – 7˚C 6˚C

ISO-T1

Operation data

(3)

FDUMVA302HEN2R

(3) Satellite ducted type (FDUM)

1.2.2 Range of usage & limitations

Model

302 series

Item

Limitations Return air temp

Indoor unit atmosphere (behind ceiling) temperature and humidity

Refrigerant line (one way) length

Vertical height difference between outdoor unit and indoor unit

Power source voltage

Voltage at starting

Cycle Time

Stop Time

Dew point temperature: 28˚C or less, relative humidity: 80% or less

Indoor unit:18~30˚CD.B Outdoor unit:-15~43˚CD.B

Max. 50m

7 minutes or more (4 minutes or more from start to stop) or (3 minutes or more from stop to start)

3 minutes or more

Min. 85% of rating

Rating ± 10%

Compressor stop/start Frequency

Max. 30m (Outdoor unit is higher) Max. 15m (Outdoor unit is lower)

Cooling

Heating Indoor unit:18~30˚CD.B Outdoor unit:-10~24˚CD.B

Air supply

Air return grille

VIEW A

VIEW B

VIEW C VIEW D

Decorative Panel

700

or less

(Max. Drain up)

Drain hose piece (Accessory)

(Installed at site)

Hole for wiring

840

212

35 270

187

137

332

637

422

420

310

267

950

630

295~325

122

100

123

140

80 100

160 43

140

140 52

ø15.88(5/8")

6-ø4

4-ø4

860~890

(Ceiling hole size)

780

(Suspension bolts pitch)

675

(Suspension bolts pitch)

Control box

Outside air opening for ducting

Exhaust air opening for ducting

Control box

Gas piping

ø9.52(3/8")

Liquid piping

or more

Lug for suspension bolts

Space for installation and service

If you are mounting units close together, leave a space of 4000 or greater between unit.

Obstacle

Holes for tapping screws

Holes

Suspension bolts

Drain

(Connectable with VP25)

1000 or more

2500 or more

Model FDTA301R

unit : mm

1.2.3 Exterior dimensions

(1) Indoor unit

(a) Ceiling recessed type (FDT)

(b) Ceiling suspended type (FDEN)

Model FDENA301R

100

300or more

150

110

135

308

4040 1240

1320

173

210 5

215

2424

690

195

235

271

109

5268

410135

145

1272(Suspension bolts pitch)

290(Suspension bolts pitch)

Air supply

Indication board

ø9.52(3/8")

ø15.88(5/8")

Holes for suspension bolts

(M8 to M10

4pcs.Not included)

Liquid piping

Gas piping

Liquid piping

Gas piping

Space for installation and service

or more

Obstacles

Air ireturn grille

Drain hose piece connection

(1)

Drain hose piece connection

(1)

Drain hose piece connection

(1)

(VP20)

Note(1) The slope of drain piping inside the unit is able to take incline of 10mm.

Unit : mm

If you are mounting units close together, leave a space of 4500 or greater between unit.

Model FDUMA302R

Space for installation and service

620

100

600

1300

860

200

130

165 285

950

285 215

465

510

635

405

460

149

274

299

199

VIEW B

295~325

(Gravity drainage)

(M10×4pcs.)

600 or less

Suspension bolts

Air return duct

Drain(VP20)

Hole for wiring

Inspection space

ø200

80.5

213205

950

45118

284

986 (Suspension bolts pitch)

Unit : mm

VIEW A

Liquid piping

ø9.52(3/8")

472

(Suspension bolts pitch)

Drain hose piece (Accessory)

(Installed at site)

Gas piping

ø15.88(5/8")

Fresh air opening for ducting

(Knock out)

Exhaust air opening for ducting

(Knock out)

Control box

Air supply duct

4-ø4

Holes of tapping screws

ø149

ø170

Max.Drain up

Drain

(Connectable with VP20)

(Duct flange

inner dimeter)

(Duct flange inner dimeter)

(2) Remote controller (Optional parts)

(a) Wired remote controller

Unit : mm

0.3mm2, 3cores (O.D.ø5.6)

LCD display

120

Wall

Wire

(Recessed)

Electrical box

(Locally Purchased)

11.5

Remote controller outline

120

83.5

120

Remote controller mounting dimensions

For the passage after wiring

Attachment hole

12×7 Long hole

9×4.5 Long hole(4 pcs.)

Installation with wiring exposed Installation with wiring recessed

Cut off with a knife or the like thin walled parts intended for screw holes, and then fix it with screws.

(This side is not grounded)

Earth wiring

Remote control switch

Remote control cord (Shielded wire)

Precation in Extending the Remote control cord

The cord should be a shielded wire.

● For all types : 0.3mm



3 cores

Note: (1) Use cables up to 0.5mm

(maximum) for those laid inside the remote control unit casing and connect to a different size

cable at a vicinity point outside the remote control unit, if necessary.

● The shielded wire should be grounded at one side only.

Maximum total extension 600m.

Within 100-200m

…………

Within 300m

…………

Within 400m

…………

Within 600m

…………

0.5 mm

0.75 mm

1.25 mm

2.0 mm

 3 cores  3 cores  3 cores  3 cores

▼

Indoor unit

(b) Wireless remote controller

60 17

150

(3) Outdoor unit

Model FDCVA302HENR

Unit: mm

Terminal block

Gas piping ø15.88 (5/8")

Liquid piping ø9.52(3/8")

(Flare connecting)

25.1165.5

°

30°

48.5103.3

750

24.1

Holes for drain

2-ø15

25.8

29.8

87.9

880

150580150

532

223

340

61 47.5

19 380 19

418

Required space for maintenance and air flow Minimum allowable space to the obstacles

Unit:mm

Mark

123

L1 Open Open

500

L2 300 250 Open

L3 100 150

100

L4 250 250 250

Installation

type

Notes (1) It is prohibited to install in a space enclosed with walls at four sides. (2) Unit must be secured with anchor bolts. Anchor bolt should not protrude more than 15 mm above the surface. (3) Where strong winds blow,the blow outlet must be oriented at right angle against the wind direction. (4) Secure a space of 1 m or more above the unit. (5) Barrier standing in front of the blow outlet mustbe lower than the height of unit.

Air inlet

Air outlet

Maintenance

space

( )

Air

inlet

(ø20×3 pcs.)

1.2.4 Inside view

Outdoor unit

Control box

4way valve

High pressure switch

(63H1)

Low pressure sensor

(PSL)

Electronic expansion valve

(EEVH)

Electronic expansion valve

(EEVC)

Solenoid valve

(SV1)

Compressor

Service valve (Liquid side)

Service valve

(Gas side)

1.2.5 Exterior appearance

(1) Indoor unit

(a) Ceiling recessed type (FDT)

Plaster white

(Front panel)

(Side panel)

(Vertical louver)

(Horizontal louver)

Light gray

(Air return grille)

Plaster white

(b) Ceiling suspended type (FDEN)

(2) Outdoor unit

Stucco white

1.2.6 Piping system

Model 302 series

Cooling cycle

Heating cycle

Thermistor

(Th

-R2)

Thermistor

(Th

-R1)

Thermistor

(Th

-D)

Thermistor

(Th

-S)

Thermistor

(Th

-A)

Service valve

(Flare connecting)

Service valve

(Flare connecting)

High pressure switch

Low pressure sensor

(63H1)

(LPT)

(SV1)

Thermistor

(Th

-R)

(EEVH)

Thermistor

(Th

-A)

Heat exchanger

Solenoid valve

Strainer

Liquid line

(ø9.52)

Gas line

(ø15.88)

4way valve

Muffler

Compressor

Compressor accumlator

Check joint

Check valve

Indoor unit

Outdoor unit

Electronic expansion valve

(EEVC)

Strainer

Receiver

Parts name

Mark

Thermistor (for protection overloading in heating)

Thermistor (for frost prevention)

Thermistor (for detecting discharge pipe temp.)

High pressure switch (for protection)

OFF 63

℃

ON 56

℃

Equipped unit

-R

-D

63H1

Indoor unit

Outdoor unit

OFF 1.0

℃

ON 10

℃

302 series

OFF 4.15MPa

ON 3.15MPa

Low pressure sensor (for protection)

LPT

Outdoor unit

OFF 0.227MPa

ON 0.079MPa

OFF 115

℃

ON 85

℃

Preset point of the protective devices

Note(1) A FDEN type strainer only should be used for the indoor unit

1.2.7 Selection chart

Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be

obtained in the following way.

Net capacity = Capacity shown on specification × Correction factors as follows.

(1) Coefficient of cooling and heating capacity in relation to temperatures

(a) Capacity compensation coeffcient

1) Cooling

0.40

0.50

0.60

0.70

0.80

0.90

1.00

1.10

1.20

1.30

1.40

15-10

50 51015202530354043

Outdoor air temperature ( DB)

Capacity compensation coeffcient

Indoor air temperture 24℃W.B

Indoor air temperture 19

℃

W.B

Indoor air temperture 12

℃

W.B

Indoor air temperture 16

℃

W.B

2) Heating

15 16 17 18 19 20 21 22 2423 25

Indoor air temperature ( DB)

Capacity compensation coeffcient

0.50

0.60

0.70

0.80

0.90

1.00

1.10

1.20

1.40

1.30

1.50

Outdoor air temperture 18.5

℃W.B

Outdoor air temperture 6

℃W.B

Outdoor air temperture 10

℃W.B

Outdoor air temperture 1

℃W.B

Outdoor air temperture -10

℃W.B

Outdoor air temperture 0

℃W.B

If a cooling operation is done when the outdoor air temperature is -5˚C or lower, as much as possible, the outdoor unit should be installed in a condition where it is not going to be influenced by natural wind. If it is hit by the wind, the compressor stop frequency will be high because of the drop in the low pressure, the capacity will drop even further and it could cause the unit to break down.

Caution:

(b) Power consumption correction factor

1) Cooling

2) Heating

Outdoor air temperature ( DB)

Power consumption correction factor

0.40

0.50

0.60

0.70

0.80

0.90

1.00

1.10

1.20

1.30

1.40

15-10

50 5 1015202530354043

Indoor air temperture 24

℃

W.B

Indoor air temperture 19

℃

W.B

Indoor air temperture 12

℃

W.B

Indoor air temperture 16

℃

W.B

Indoor air temperature ( DB)

Power consumption correction factor

0.50

0.60

0.70

0.80

0.90

1.00

1.10

1.20

1.40

1.30

1.50

15 16 18 20 22 2417 19 21 23 25

Outdoor air temperture 18.5

℃W.B

Outdoor air temperture 6

℃W.B

Outdoor air temperture 10

℃W.B

Outdoor air temperture 1

℃W.B

Outdoor air temperture -10

℃W.B

Outdoor air temperture 0

℃W.B

Outdoor air temperature ( DB)

Sensible heat factor

0.60

0.65

0.70

0.75

0.80

0.85

0.90

0.95

1.00

1.05

15-10

50 5 1015202530354043

Indoor air temperture 12℃W.B

Indoor air temperture 24

℃

W.B

Indoor air temperture 19

℃

W.B

Indoor air temperture 16

℃

W.B

(3) Correction of cooling and heating capacity in relation to one way length of refrigerant piping

It is necessary to correct the cooling and heating capacity in relation to the one way equivalent piping length between the indoor

and outdoor units.

(4) When the outdoor unit is located at a lower height than the indoor unit in cooling operation and when the outdoor unit is located

at a higher height than the indoor unit in heating operation, the following values should be subtracted from the values in the

above table.

Height difference between the indoor unit and outdoor unit in the vertical height difference

5m 10m 15m 20m 25m 30m

Adjustment coefficient 0.01 0.02 0.03 0.04 0.05 0.06

(2) Correction of cooling and heating capacity in relation to air flow rate control (fan speed)

Coefficient: 1.00 at High, 0.95 at Low

Note (1) Calculate the equivalent length using the following formula.

However, install the piping so that the equivalent length is within +5 m of the piping distance limit (actual length) for each respective piping system.

● Equivalent length = Actual length + (equivalent length of bends x number of bends in the piping)

Equivalent length for 1 bend

0.15

ø9.52 ø15.88

0.25

Gas pipe diameter (mm)

Bend equivalent length

Equivalent piping length

(1)

(m) 7.5 10 15 20 25 30 35 40 45 50 55

Heating 1 1 1 1 1 0.998 0.998 0.993 0.993 0.988 0.988

ø 15.88 1 0.996

0.989 0.982 0.975 0.968 0.961 0.954 0.947

0.940 0.933

ø 19.05

1.008 1.006 1.003 1 0.997 0.994 0.991 0.988 0.985 0.982 0.979

Cooling

• Outdoor air temperature degree 5˚C or more

Equivalent piping length

(1)

(m) 7.5 10 15 20 25 30 35 40 45 50 55

Heating 1 1 1 1 1 0.998 0.998 0.993 0.993 0.988 0.988

ø 15.88 0.800 0.793

0.779 0.765 0.751 0.738 0.724 0.710 0.696

0.682 0.669

ø 19.05

0.806 0.798 0.786 0.774 0.762 0.750 0.738 0.727 0.715 0.703 0.691

Cooling

• Outdoor air temperature degree -5˚C or more

Equivalent piping length

(1)

(m) 7.5 10 15 20 25 30 35 40 45 50 55

Heating 1 1 1 1 1 0.998 0.998 0.993 0.993 0.988 0.988

ø 15.88 0.600 0.590

0.569 0.549 0.528 0.507 0.487 0.466 0.446

0.425 0.404

ø 19.05

0.605 0.590 0.569 0.548 0.527 0.507 0.486 0.465 0.444 0.424 0.403

Cooling

• Outdoor air temperature degree -15˚C or more

Item

Model

302 servies

Max. one way piping length 50m

Max. vertical height difference Outdoor unit is higher 30m Outdoor unit is lower 15m

Piping length limitations

How to obtain the cooling and heating capacity

Example : The net cooling capacity of the model FDTVA302HEN1R with the air flow “High”, the piping length of 15m, the outdoor unit

located 5m lower than the indoor unit, indoor wet-bulb temperature at 19.0 ˚C and outdoor dry-bulb temperature 35 ˚C is

Net cooling capacity = 7.1 × 1.00 × (0.989 - 0.01) × 1.0 ≒ 7.0 kW

Factor by air temperatures

FDTVA302HEN1R Air flow

“High”

Length 15m. Height difference 5 m

Note (1) Values in the table indicate

the one way piping length

between the indoor and

outdoor units.

100

120

−10

14 17 20 22

Air flow(m3/min)

Lower

limit

Uppe

limit

［Standard］3-spot blower internal resistance

Square duct blower internal resistance

High speed・Upper limit

Standard

・

Upper limit

High speed

・

Low limit

High speed

・

High

High speed

・

Medium

High speed

・

Low

Standard

・

Low

Standard

・

Medium

Standard

・

High

Static pressure (Pa)

2-spot blower internal resistance

1.2.9 Noise level

Notes (1) The data are based on the following conditions.

Ambient air temperature: Indoor unit 27˚C DB, 19˚C WB. Outdoor unit 35˚C DB.

Notes (2) The data in the chart are measured in an unechonic room.

Notes (3) The noise levels measured in the field are usually higher than the data because of reflection.

Notes (4) Noise levels for the FDT and FDEN series show the noise level when in the Powerful mode.

(1) Indoor unit

(a) Ceiling recessed type (FDT)

Measured based on JIS B 8616

Mike position as right

1.5m Mike (center & low points)

Model FDTA301R

Noise level 38 dB (A) at HIGH

35 dB (A) at MEDIUM

33 dB (A) at LOW

N60

125

250 500 1000 2000 4000 8000

N50

N40

N30

N20

N10

Souud Pressure Level

(standard 0.0002µ bar)

Mid Octave Band Frequency (Hz)

1.2.8 Characteristics of fan

(1) Satellite ducted type (FDUM)

Model FDUMA302R

Duct specs.

1 spot closing

Stan

dard

Stan

dard

Stan

dard

High speed

Standard Square duct

Unit : Pa

 External static pressure table

Model

20 30 65 50 85 55 90

FDUMA302R

Air flow (m

/min)

(4)

High speed

(4)

High speed

(1)

Notes (1) 1 spot closing: Round duct flange at center is removed and shield with a special panel (option).

(2) Standard: ø200 duct are installed at all blowout holes. (3) Square duct: All round ducts are removed and replaced with special

square duct flanges (option).

(4) When using the high speed setting, turn the dip swich SW9-4 on the indoor PCB to the ON position. (When setting from the remote controller, select “Hi CEILING 1” )

Model FDENA301R

Noise level 44 dB (A) at HIGH

41 dB (A) at MEDIUM

39 dB (A) at LOW

Souud Pressure Level

(standard 0.0002µ bar)

Mid Octave Band Frequency (Hz)

N30

N40

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

(b) Ceiling suspended type (FDEN)

Measured based on JIS B 8616

Mike position as right

Unit

1 m

Mike (front & at low point)

Measured based on JIS B 8616

Mike position as right

Model FDUMA302R

Noise level 35 dB (A) at HIGH

32 dB (A) at MEDIUM

29 dB (A) at LOW

(2) Outdoor unit

Measured based on JIS B 8616

Mike position: at highest noise level in position as below

Distance from front side 1m

Height 1m

Model FDCVA302HENR

Noise level 48 dB (A)

1.5 m

Unit

Mike (center & low points)

N30

N40

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

Souud Pressure Level

(standard 0.0002µ bar)

Mid Octave Band Frequency (Hz)

N30

N40

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

Souud Pressure Level

(standard 0.0002µ bar)

Mid Octave Band Frequency (Hz)

2/N

Y/GN

CnW1

CnW4

CnW7

CnN4

CnH

CnT

CnJ

CnJ2

CnB

ThC

CnI

CnI2

CnV CnY

CnR

CnR2

CnM3

CnF

CFI

LM1

XR1

XR3

XR2

XR4

XR5

ThI-A

ThI-R1

Option

LM2

LM3

LM4

TrI

To outdoor unit Power line Signal line

220/240V 15V

F(3.15A)

F(0.16A)

Remote controller

FMI CFI DM FS LM1~4 ThI-A ThI-R1 ThI-R2 ThC SW2

Fan motor Capacitor for FMI Drain motor Float switch Louver motor Thermistor Thermistor Thermistor Thermistor Remote controller communication address

SW5-3,4 SW9-3 TrI F LED1 LED2 XR1 XR2 XR3 XR4

Filter sign Emergency operation Transformer Fuse Indication lamp(Red) Indication lamp(Green) Operation output(DC12V output) Heating output(DC12V output) Thermo ON output(DC12V output) Inspection output(DC12V output)

XR5 X1,2,3,6 X4 TB CnB~Z



mark

Remote operation input(volt-free contact) Auxiliary relay(For FM) Auxiliary relay(For DM) Terminal block( mark) Connector Closed-end connector

Mark Parts nameMark Parts nameMark Parts name

Meaning of marks

Color marks

BK BL BR OR P RD WH Y Y/GN

Black Blue Brown Orange Pink Red White Yellow Yellow/Green

Mark Color

SW5

SW9

SW2

LED • 2

LED • 1

Power board

Printed circuit board

3795

1 2 3 4

23456

2345

CnN3

CnN1

ThI-R2

FMI

2/N

Blower fan tap switch

SW9-4

OFF

Fan control, powerful mode Fan control, mild mode

Function number

Function description

Setting

1 Set SW9-4 provided on the indoor unit PCB to OFF.

Use one of the two methods to set the fan tap.

Hi CEILING SET STANDARD

(Mild mode)

CnW2

CnW10

CnW8

CnW5

Select the “STANDARD (Mild mode)” setting for “

C ” in #01 of

“I/U FUNCTION

▲” (indoor unit function) by using remote

controller function setting.

1.3 ELECTRICAL DATA

1.3.1 Electrical wiring

(1) Indoor unit

(a) Ceiling recessed type (FDT)

Model FDTA301R

F (3.15A)

Remote controller

CnB CnB2

AMP SW2 SW1

LED3 LED1 LED2

CFI2

CnF2

FMI2

CFI1

FMI1

CnF1

CnR

CnM3

CnI

2/N

XR1

XR4

XR5

XR2

XR3

CnT

CnO

CnY

CnV

CnW1

CnW2

TrI

BK RD

CnN3

CnH

ThI-R1ThI-A

CnN1

ThI-R2

CnN2

11234345621

97531

CUHH M L

X1 X3

X2 X4

Option

CnW0

Printed circuit board

220/240V

15V

Y/GN

To outdoor unit Power line Signal line

2/N

P BR

1 2 3

4 5

CnJ1

SW5

SW9

SW2

LED • 2

LED • 1

FMI1,2 CFI1,2 LM ThI-A ThI-R1 ThI-R2 ThC SW2 SW5-3,4 SW9-3 TrI

Fan motor Capacitor for FMI Louver motor Thermistor Thermistor Thermistor Thermistor Remote controller communication address Filter sign Emergency operation Transformer

F LED1 LED2 XR1 XR2 XR3 XR4 XR5 X1,2,3,6 TB CnB~Z

Fuse Indication lamp(Red) Indication lamp(Green) Operation output(DC12V output) Heating output(DC12V output) Thermo ON output(DC12V output) Inspection output(DC12V output) Remote operation input(volt-free contact) Auxiliary relay(For FM) Terminal block( mark) Connector



mark LED•1 LED•2 LED•3 SW1 SW2

Closed-end connector Indication lamp(Green-Operation) Indication lamp(Yellow-Timer/Check) 7-segement indicator(For check) Switch(For setting) Backup switch(Operation/Stop)

Mark Parts nameMark Parts nameMark Parts name

Meaning of marks

Color marks

Wireless specification

BK BL BR OR P RD WH Y Y/GN

Black Blue Brown Orange Pink Red White Yellow Yellow/Green

Mark Color

Y/GN

Blower fan tap switch

SW9-4

OFF

Fan control, powerful mode Fan control, mild mode

Function number Function description Setting

1 Set SW9-4 provided on the indoor unit PCB to OFF.

Hi CEILING SET STANDARD

(Mild mode)

Wired specification

Remote controller

ThC

Use one of the two methods to set the fan tap.

Select the “STANDARD (Mild mode)” setting for “ ” in #01 of “I/U FUNCTION

▲” (indoor unit function) by using remote controller function setting.

(b) Ceiling suspended type (FDEN)

Model FDENA301R

Model FDUMA302R

2/N

To outdoor unit Power wires Signal wire

SW9

SW5

CnI2

CnR2

CnRI1

CnRI

CnI

CnR

CnH

CnH2

CnN3

CnNZ

CnN1

CnN6

CnN5

CnW0

CnW2 CnW1

SW2

LED

•

LED

•

2/N

Y/GN

F(3.15A)

F(0.16A)

X6 X2

X1 X3

WHWH

RD/Y

BL/Y

BR/Y

RDRD

RD RD

ThI-A ThI-R1 ThI-R2

XR3 XR1

XR5

XR2XR4

CnT

CnM3

CnF3

CnG

CnS

Option

CUH H M L

FMI1

CFI1

TrI

15V

220/ 240V

Printed circuid board

FMI1 CFI1 DM FS ThI-A ThI-R1 ThI-R2 ThC

Fan motor Capacitor for FMI Drain motor Float switch Thermistor Thermistor Thermistor Thermistor

SW5-3,4 SW9-3 TrI F LED

•

LED

•

XR1

Filter sign

SW2

Remote control communications address

Emerqency operation Transformer Fuse Indication lamp(Red:inspection) Indication lamp(Green:normal operation) Operation output(DC12V output)

XR2 XR3

XR4 XR5 X1,2,3,6 X4 TB CnA~Z



mark

Heating output(DC12V output) Thermo ON output(DC12V output)

Inspection output(DC12V output) Remote operation input(volt-free contact) Auxiliary relay(For FM) Auxiliary relay(For DM)

Terminal block( mark) Connector(

□

mark)

Closed-end connector

Mark

Mark Parts name Parts name Parts name

Meaning of marks

Color marks

BK BL BL/Y BR BR/Y

Black Blue Blue/Yellow Brown Brown/Yellow

RD RD/Y WH Y Y/GN

Orange

Red Red/Yellow White Yellow Yellow/Green

Mark Color

XYZ

CnB

ThC

Remote controller

21 31

3421

432 1

123

579

Blower fan tap switch

SW9-4

OFF

Fan control, high speed (High ceiling) Fan control, standard

Function number Function description

Setting

Use one of the two methods to set the fan tap. 1Set SW9-4 provided on the indoor unit PCB to ON.

Hi CEILING SET

Hi CEILING 1

2Select the “Hi CEILING 1 (High-speed tap)

”

setting for “ ”

in #01 of

“

I/U FUNCTION

▲”

(Indoor unit fuction) by using

remote controller function setting.

(2) Outdoor unit

Model FDCVA302HENR

CNG1

CNR

20S

CNS

52X1

PWB1

52X3

CNW

CNW2

CNFANCNEEV1CNEEV2

THo-D

CNTH

63H1

CNH

THo-R1

LED2LED1

132

SW5

CNQ1

CNQ2

THo-ATHo-S THo-IP

CNIP

LPT

CNPS

SW9

SW8

132

SW3

CNQ2

SW7

756

243 1

45623

189

65 14

FMO1

Yellow/Green

Color

Position of compressor terminals

WH White

Y Y/GN

Gray

P Pink

Yellow

Mark

Color marks

BR OR RD

BK BL

Red

Orange

Brown

Blue

Black

Auxillary relay (for 20S)

Expansion valve for cooling

Solenoid valve for 4 way valve

Auxillary relay (for CH)

Parts name

Crankcase heater

SM1

20S

52X3

CH 52X1

Fan motor

Compressor motor

FMO1

Mark

Meaning of marks

High pressure switch

Thermistor (H.X. temp.)

Thermistor (discharge temp.)

Low pressure sensor

Thermistor (suction temp.)

Thermistor (Outdoor air temp.)

Solnoid valve

Thermistor (IPM)Tho-IP

SV1

LPT

Tho-R1

Tho-D

Tho-S

Tho-A

Expansion valve for heating

Parts name

SM2 63H1

Mark

Local setting switch Indication lamp (GREEN) Indication lamp (RED)

Reactor

Pump down switch

Diode module

LED1

LED2

SW9 SW3,5,7,8

Terminal block Fuse

ConnectorCnA~Z

TB F

Parts nameMark

CNI1

CNI2

CNG2

CNO1

CNO2

PWB2 Inverter

PWB3 N/F

F(20A)

CNA1

CNA2

Y/GN

S.M2 S.M1

Power source 1Phase 220-240V

To indoor unit

Power wires

Signal wire 3

SV1

CNS

CNI3

CNI4

T27T26WVU

T25

T24

T21 T22

T13

T11

T10

T9T8T1T2

U(RD)

V(WH)

W(BL)

DON'T CONNECT

1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

(1) Remote controller

(a) Wired remote controller

The figure below shows the remote controller with the cover opened. Note that all the items that may be displayed in the

liquid crystal display area are shown in the figure for the sake of explanation.

Characters displayed with dots in the liquid crystal display area are abbreviated.

Pull the cover downward to open it.

*If you press any of the switches above and " " is display, the switch has no function. But it does not mean a failure.

Weekly timer display

Displays the settings of the weekly timer.

Vent Indicator

Indicates operation in the Ventilation mode.

ON/OFF switch

This switch is used to operate and stop the air conditioning system. Press the switch once to operate the system and press it once again to stop the system.

MODE switch

This switch is used to switch between operation modes.

Operation setting display area

Displays setting temperature, airflow volume, operation mode and operation message.

Operation/Check indicator light

During operation: Lit in green In case of error: Flashing in red

FAN SPEED switch

This switch is used to set the airflow volume.

SET switch

This switch is used to apply the timer operation setting. This switch is also used to make silent mode operation settings.

RESET switch

The switch which returns to a previous step.

Central control display

Displayed when the air conditioning system is controlled by the option controller.

Timer operation display

Displays the settings related to timer operation.

AIR CON No. (Air conditioning system No.) switch

Displays the number of the connected air conditioning system.

CHECK switch

This switch is used at servicing.

TEST switch

This switch is used during test operation.

Temperature setting switches

These switches are used to set

the temperature of the room.

VENT switch

Switch that operates the connected ventilator.

Timer setting switches

These switches are used to set the timer mode and time.

TIMER switch

This switch is used to select a timer mode.

GRILL switch

This switch has no function. When this switch is pressed, (Invalid Operation) is displayed, but it does not mean a failure.

LOUVER switch

This switch is used to operate/stop the swing louver.

(b) Wireless remote controller

Indication section

FAN SPEED indicator

Indicates the selected blow rate.

ON-TIMER indicator

Indicated when ON-TIMER is set.

ROOM TEMP. indicator

Indicates set temperature.

AIR FLOW indicator

Indicates the condition of swing flap.

ON-TIMER setting time indicator

Indicates the ON-TIMER setting time. Indicates nothing when ON-TIMER is not set.

OFF-TIMER indicator

Indicated when OFF-TIMER set.

OFF-TIMER setting time indicator

Indicates OFF-TIMER setting time. Indicates the current time when the OFF-TIMER is not set.

OPERATION MODE indicator

Indicates selected operation with lamp.

FILTER indicator

Indicates for 2 seconds when FILTER button is pressed.

Operation section

FAN SPEED button

Every time when the button is pressed, the mode is sequentially changed in order.

HILOMED

OPERATION MODE select button

The operation mode on the side of the



indicator is the currently selected operation mode. It will switch in order.

ON-TIMER button

This button selects ON-TIMER operation.

OFF-TIMER button

This button selects OFF-TIMER operation.

TIME SET UP switch

This switch for setting the time.

ROOM TEMP. button

Press either the or

but ton to set the room temperature.

ACL switch

This is a switch to reset the microcomputer

TIMER CANCEL button

This button cancels the timer settings.

FILTER button

Used to reset (turn off) the filter sign. Press the button only after completing the filter cleaning.

Signal sender

Signal are sent to the air conditioner from here.

AIR FLOW button

Used to start or stop the swing flap.

ON/OFF button

When the button is pressed, the air conditioner is started, and when the button is pressed once again, it is stopped.

(FAN)

(AUTO) (COOL)

(DRY)

(HEAT)

Cooling Fan Heating Dry

Control part

Compressor

 



4-way valve   

Outdoor fan

 



Indoor fan



Louver motor

/ 

Condensate motor

(5min. ON) (5min. ON)

 (5min. ON)

Note (1) :ON

 :OFF

/ × :According to control other than temperature control.

Thermostat

Function

–

Temperature difference between thermostat set temp.

and return air temp. (Detected by ThI-A)

Temperature difference between thermostat set

temp. and return air temp. (Detected by Th

-A)

Heating operation

OFF

-1 Set temp.by thermostat

Cooling operation

OFF

-1 Set temp.by thermostat

(2) Operation control function by the indoor unit controller

(a) Room temperature control (Differential of thermostat)

(b) Automatic operation

If the Auto mode is selected on the remote control device, the selection of cooling or heating can be made automatically

depending on the room temperature (and the temperature of indoor heat exchanger). (When the switching between the

cooling and the heating is made within 3 minutes, the compressor will not operate for 3 minutes.) This will make much easier

the switching of cooling/heating at the change of season and can be adapted to the unmanned operation at bank cash dis-

penser.

Notes (1) During the automatic switching of cooling/heating the room

temperature is controlled based on the setting of room temperature.

Notes (2) If the temperature of indoor heat exchanger rises beyond 59˚C during

the heating operation, it is switched automatically to the cooling

operation. For an hour after this switching, the heating operation is

suspended regardless of the temperature as shown at left.

Heating operation

Cooling operation

Setting room temp.

Room temp. (detected at Th

-A) [deg]

Ready for heating

Suspended heating operation

Indoor heat exchanger temperature (˚C)

Thermostat

OFF

Thermostat

OFF

Hot start

(Defrost)

Thermostat

OFF

(d) Dehumidifying operation (“THERMAL DRY”)

The compressor, the indoor fan motor and the outdoor fan

motor are operated intermittently under thermistor (Th

I-A)

control according to the appropriate operation block, to pro-

vide cooling operation for the dehumidifying.

Notes (1) Blocks A and B: Normal cooling operation for 16 minutes after operation starts, then when the set temperature is reached,

the thermostat stops. 16 minutes later, it switches to normal operation. Blocks C and D: The operation mode shown in the table above is performed for 8 minutes. After 8

minutes, it switches to normal operation.

Notes (2) Under normal operation, the temperature is checked every 8 minutes after normal operation starts to determine which block is operating,

then the operation mode is decided.

Operation block

DCBA

Set temp. by thermostat

Pattern of operation

Operation block

Thermal drying starting (for 8 or 16 minutes after operation started)

(16 minutes)

• The air flow is set at 1 speed lower than the set air flow.

(8 minutes) Continuous cooling operation (FMI:Lo)

(8 minutes)

CM, FM0

FMI

(8 minutes)

CM, FM0

FMI

(8 minutes)

CM, FM0

FMI

(8 minutes) All stoppage

(e) Timer Operation

1) Simple Timer

This sets the amount of time from the current time that the air conditioner goes OFF.

The off time can be selected in 10 steps, from “Off 1 hour from now” to “Off 10 hours from now.” After the simple timer

is set, the number of hours until the air conditioning goes off is displayed in one hour units from the current time.

2) Time Off Timer

The time the air conditioner goes OFF can be set in 10-minute increments.

3) Time On Timer

The time the air conditioner goes ON can be set in 10-minute increments. The set temperature can also be set at the same

time.

CM, FMO: ON FMI : ON

Normal thermal dry operation (after completion of thermal drying)

Low

-2

High

Normal cooling operation

4) Weekly timer

Each day, it is possible to set this timer's operation up to 4 times (ON time, or OFF timer).

5) Possible joint use timer operation setting combinations

Simple timer

Time OFF timer

Time ON timer

Weekly timer

Simple timer







Time OFF timer







Time ON timer





Weekly timer



(f) Hot start (Cold draft prevention during heating)

When heating operation starts, when the thermostat is reset, during a defrosting operation or when resetting a heating opera-

tion, in order to prevent a cold draft, the indoor heat exchanger (sensed by ThI-R1 and R2) control the indoor fan.

Heating start thermostat judgment

Normal state, set air flow

Indoor heat exchanger (˚C) Indoor heat exchanger (˚C)

25 35

Fan OFF

Fan

Set air flow

Indoor heat exchanger (˚C)

Fan

OFF

Set air flow

Indoor heat exchanger (˚C)

Fan

(1)

Set air flow

Heat exchanger temperature 35˚C or above, or 7 minutes passesHeat exchanger temperature 35˚C or above, or 7 minutes passes

Compressor ON Defrosting ends

Thermostat ONThermostat OFF

Defrosting startsCompressor OFF

Notes (1) If J2 starts, it changes from OFF to Lo for 5 minutes.

Notes (2) During Hot Start (the compressor is operating and the indoor fan is not operating at the set air flow), Heating preparation is displayed.

(g) FM control with the heating thermostat turned off (For cold draft prevention)

In order to prevent a cold draft while the heating thermostat is turned off, the indoor blower is controlled in response to the

temperature of the indoor heat exchanger as illustrated below. It should be noted that if jumer wire J2 (SW7-2) on the indoor

PCB is turned off, the indoor blower will stop so far as the temperature of the indoor heat exchanger is lower than 40°C. It

will be turned to the Lo operation 5 minutes later.

Note (1) After the thermostat is reset, it returns to the hot start

control.

(Setting air flow)

Indoor heat exchanger temperature (˚C)

40 45

Note (1) : Possible, : Impossible

(h) Room temperature sensing temperature compensation during heating

In the standard specifications, the temperature set on the thermostat is used to turn the compressor on and off, but in cases

where the warm air easily escapes to the ceiling and the thermostat ends up turning off too soon, Jumper wire J4 (SW7-4) on

the indoor PCB can be disconnected. When this is done, the compressor can be turned ON and OFF at the set temperature +3

degrees, and the feeling that the room is heated can be improved. However, the upper limit for the set temperature is 30°C.

(i) Filter sign

If operating time (the length of time the ON/OFF switch is ON) totals 180 hours

(1)

, “FILTER CLEANING” is displayed on

the remote control unit. (This is displayed whether the system is running or not, when the unit is broken down, and when

there is central control.)

Notes (1) The following controls are enabled by the combination of the ON/OFF settings of 2 switches on the indoor unit PCB, SW5-3 and SW5-4.

(They are switched OFF when the unit is shipped from the factory. The setting time is 180 hours.)

Operation

Room temperature (deg)

—

+ 1

Stop

Standard

Compressor

Operation

Set temperatureSet temperature

Room temperature (deg)

+ 4+2

Stop

If J4 (SW7-4) is disconnected (if it is turned ON),

Compressor

SW5-3 OFF

SW5-4 OFF

SW5-3 OFF

SW5-4 ON

SW5-3 ON

SW5-4 OFF

SW5-3 ON

SW5-4 ON

Setting time: 180 hrs. (when shipped from factory)

Setting time: 600 hrs. (Display)

Setting time: 1000 hrs. (Display)

Setting time: 1000 hrs. (Unit stop)

FunctionSwitch

Notes (2) When SW5-3, SW5-4 is switched ON, the message “FILTER CLEANING” is displayed after the setting time has passed, then the unit stops after

another 24 hours have passed (including stop time).

(j) Auto swing control (Except the FDUR model)

1) Louver Control

a) While the air conditioner is operating, press the “LOUVER” switch.

“AU TO

” is displayed for 3 seconds and the swing louvers move up and down continuously.

b) When fixing the position of the swing louvers, press the “LOUVER” switch once while the swing louvers are moving. 4

stop positions are displayed in sequence at 1-second intervals.

When the display comes to the position where you would like to stop the louvers, press the “LOUVER” switch once

more. The display will stop the message (ex. “STOP



”) will be displayed for 3 seconds, then the swing louvers will

stop.

c) Louver operation when the louver 4-position controller’s power goes On

When the power is turned ON, the louvers automatically swing 1 time automatically (without remote control operation).

This is done so that the microcomputer can confirm the louver’s position and input the louver motor’s (LM) position to

the microcomputer.

Note (1) When the “LOUVER” switch is turned ON, the louver position LCD display displays the swing operation for 10 seconds.

Then “AUTO

” is displayed for 3 seconds.

2) Auto louver horizontal set during heating

During display of “

” (Heating Preparation) (during hot start and heating thermostat OFF), the louvers are in the

horizontal position regardless of the operation of the auto swing switch (auto swing and louver stop). (In order to prevent

cold drafts.) Also, the louver position display LCD continues the previous display from before this control started.

If the “

” (Heating Preparation) display goes off, the LCD display also returns to the original display.

3) Louver free stop control

Setting an open circuit with jumper wire J5 (SW8-1), used for setting louver free stop, causes the louver motor to stop if there is a stop signal from the remote control unit and saves the position of the louver in memory. Then if there is an auto swing signal from the remote control unit, auto swing control starts from the previous stop position.

(k) Condensate pump motor (DM) Control [FDT and FDUM models only]

(a) Drain motor is started no sooner than the compressor is turned ON during cooling or dehumidifying operation. The drain

motor continues to operate for 5 minutes after the stop of unit operation, stop with the error stop, thermostat stop and at

switching from cooling or dehumidifying operation to blowing or heating operation. When there is any unit subjected to oil

return control, the drain motor is operated for 5 minutes at such occasion.

(b) Overflow detection is performed by the float switch at all times regardless of the operating mode. If the float switch

circuit is detected to be open continuously for 3 seconds (or when the float switch is disconnected or a wire is broken), an

abnormal stop (E9) is performed and the condensate pump motor runs until the float switch recovers.

(l) Air flow mode control

Air flow mode control can be changed using DIP switch SW9-4 on the indoor PCB.

Abnormal stop

Indoor heat exchanger temperature(˚C)

Heating operation possible

Cooling operation

Indoor heat exchanger temperature (˚C)

1.0

Fan operation

SW9-4 OFF

(Mild Mode Control)

SW9-4 ON

(Powerful mode Control)

Air flow mode

Item

DIP SW

FDT, FDEN models

Hi, Me, Lo UHi, Hi, Me

(m) Compressor inching prevention control

1) 3-minute timer

If the compressor stops due to operation of the thermostat, the Run switch on the remote controller or some trouble, it is not

restarted after 3 minutes. However, when the power is turned ON, the 3-minute timer becomes inactive.

2) 3-minute forced operation timer

a) For 3 minutes after the compressor goes ON, it does not stop. However, it will stop if the Run/Stop button is pressed

and through a change in the operation mode, it sill stop immediately when the thermostat goes OFF.

b) During 3-minute forced operation timer control in heating operation, if the thermostat goes OFF, the louver position

is set in the horizontal position.

Note (1) The compressor stops when protection control starts.

(n) Heating overload porotection

If an overload condition is sensed continuously for 2 seconds by the indoor heat exchanger temperature during heating

(sensed by Thi-R1 or R2), the compressor is stopped. After a 3-minute delay, the compressor is restarted. If the overload is

sensed 5 times within 60 minutes of the first time it was detected, an abnormal stop is performed (E8). Also, if the overload

state is sensed continuously for 6 minutes, it results in an abnormal stop.

(o) Frost prevention during cooling, dehumidification

In order to prevent frost during cooling and dehumidification, 3 minutes after compressor operation starts, if the indoor heat

exchanger temperature (sensed by Thi-R1 or R2) is 3.5˚C or lower for 30 seconds, the compressor’s speed is lowered. 30

seconds later, if the indoor heat exchanger temperature is 3.5˚C or lower, the speed is reduced still more. If the temperature

becomes lower than 3.5˚C continuously, this control is terminated. Furthermore, even if the compressor’s speed is lowered, if

the indoor heat exchanger becomes as shown in the diagram below, the unit switches to fan operation.

(p) Thermistor (Air return, heat exchanger) disconnected wire detection.

If the temperature sensed by the thermistor is –50°C or lower continuously for 5 seconds, the compressor stops. After a 3-

minute delay, the compressor is restarted, but if a recurrence is detected within 60 minutes of the 1st time, or if it is sensed

continuously for 6 minutes, it results in an abnormal stop (E6, E7).

Notes (1) When the unit is shipped, SW9-4 is turned ON.

Notes (2) If SW9-4 is ON, the fan operates in Me even during hot start and

when the heating thermostat is OFF.

SW9-4 OFF

(Standard)

SW9-4 ON

(High speed)

Air flow mode

Item

DIP SW

FDUM model

Hi, Me, Lo UHi, Hi, Me

Notes (1) When the unit is shipped, SW9-4 is turned OFF.

Notes (2) If SW9-4 is ON, the fan operates in Hi even during hot start and

when the heating thermostat is OFF.

(q) Using 1 remote controller to control multiple units (indoor units - up to 16 units)

1) Function

A single remote control switch can be used for group control of multiple units (indoor units - up to 16 units). All units in

the group that have had the remote control switch set at [Operating Mode] can be turned on and off in order of the unit

number.

This functions independently of the thermostat and protection functions of each unit.

2) Display to remote controller a) Remote or center and heating preparation: Displays for the youngest unit for the remote mode (center mode

if there is no remote mode) of the units in operation.

b) Inspection and filter sign: Displays either to the first corresponding unit.

3) Confirmation of connected units

Pressing the “AIR CON No.” switch on the remote control unit displays the indoor unit address. Pressing the

button

displays the indoor units in the order of lowest to highest assigned No.

4) Error a) If an error occurs (protection device activation) with some of the units in the group, those units will have an error

stop, but the properly operating units will continue operation.

b) Wiring outline

Route the wire connecting each of the indoor and outdoor units as it would be for each unit. Use the terminal block

(X, Y, Z) for the remote control for the group controller and use a jumper wire among each of the rooms.

(r) External control (remote display) /control of input signal

1) External control (remote display) output Following output connectors (CnT) are provided on the control PCB of indoor unit.

● Operation output: Power to engage DC 12V relay (provided by the customer) is outputted during operation.

● Heating output: Power to engage DC 12V relay (provided by the customer) is outputted during the heating operation.

● Compressor ON output: Power to engage DC 12V relay (provided by the customer) is outputted while the compressor

is operating.

● Error output: When any error occurs, the power to engage DC 12V relay (provided by the customer) is outputted.

2) Control of input signal

(Make sure to connect the standard remote control unit. Control of input signal is not available without the standard

remote controller.)

Control of input signal (switch input, timer input) connectors (CnT) are provided on the control PCB of the indoor unit.

However, when the operation of air conditioner is under the Center Mode, the remote control by CnT is invalid.

Notes (1) The unit No. is set using SW2 on the indoor unit control PCB. The SW2 unit No. setting only needs to be performed at the indoor units.

For twin, triple or double twin specifications, setting of the master unit and slave units is necessary. This can be done using SW5. (All the units are set as the master unit at the factory.)

Notes (2) If unit number is not important, random can be used. However, setting in order from 0, 1, 2, to F will ensure setting without error.

SW2: Set 0~9 and A~F. SW5: Set as the master or slave unit. (See the table at right.)

123

OFF OFF

OFF ON

SW5-1 SW5-2

indoor unit

Remote controller

Outdoor unit

Refrigerant piping

Remote controller wire

Indoor/Outdoor connection wire

Unit

Switch

SW5 Setting

Master

Slave a

(Slave a)

(Master)

a) At shipping from factory J1 on PCB OFF

● Input signal to CnT OFF → ON [Edge input] ... Air conditioner ON

● Input signal to CnT ON → OFF [Edge input] ... Air conditioner OFF

b) When J1 on the PCB of indoor unit is turned on at the field.

Input signal to CnT becomes Valid at OFF → ON only and the motion of air conditioner [ON/OFF] is inverted.

CnT Input

Air Conditioner A

Air Conditioner B

OFF

*ON

OFF

OFF OFF

*ON

OFF

CnT Input

Air Conditioner A

Air Conditioner B

Note (1) The ON at the * mark indicates ON

using the remote control switch, etc.

DRY COOL FAN HEAT AUTO

(3) Operation control function by the wired remote controller

(a) Remote controller operation mode switch switching sequence

(b) CPU reset

If the “GRILL” switch and “CHECK” switch on the remote controller are pressed at the same time, this function is activated. Power supply reset and run are the same.

● By setting the remote control functions, setting of the “POWER FAILURE COMPENSATION SETTING” is enabled.

● The remote controller’s status is always stored in memory, and after the unit is reset following a power failure, operation

is resumed using the memory contents. However, the auto swing stop position and timer mode are cancelled, but the weekly timer setting is reset on both friday and holidays. After power is restored, by resetting the clock, then canceling each day’s holiday setting, the weekly timer’s setting is enabled.

● Contents stored in memory for power failure compensation are as follows.

Note (1) Items 6, 7 and 8 are stored in memory regardless of whether power failure compensation is enabled or disabled, and the quiet mode setting is

cancelled regardless of whether power failure compensation is enabled or disabled.

1 When there is a power failure running/Stopped

During operation in the off time timer mode and simple timer mode, the setting changes to stopped. (The timer mode is cancelled when power is restored, but the weekly timer setting for all days is changed to the holiday setting.)

2 Operation mode 3 Fan speed mode 4 Room temperature setting 5 Louver auto swing/stop

However, the stop position (position 4) is cancelled and it becomes the horizontal position (1).

6 The remote control function item, set in accordance with the remote control setting (“Indoor unit function items” are

stored in the indoor unit’s memory.)

7 Upper limit and lower limit values set by temperature setting control.

8 Weekly timer settings (other timer settings are not stored in memory).

Remote controller PCB parts arrangement

Note (1) SW2 is not normally used, so do not change the selection.

Switch

SW1

Function

Master remote controller

Slave remote controller

SW1

SW2

SW1

White

Black

X Z

Red

Control select switch (SW1)

(4) Operation control function by the outdoor unit controller

(a) Deciding the compressor speed

The indoor unit’s return air temperature ad the set temperature are used to carry out fuzzy calculations, then the required speed is decided. Speed control compensation is then activated to decide the speed.

Unit required speed (i) Dehumidify and cooling operation

Model

Item

Units: rps

302 series

Outdoor unit

Maximum required speed

Minimum required speed

(ii) Heating operation

Model

Item

Units: rps

302 series

Outdoor unit

Maximum required speed

Minimum required speed

(b) Compressor start control

At the point when compressor operating conditions are established, the control in either item (i) or item (ii) is executed. (i) The first time the compressor starts after the power is turned ON, or when the operating mode is the same as the

operating mode the previous time the compressor ran, the compressor starts 5 seconds after the compressor ON conditions are established.

(ii) If the mode reverses from the previous operating mode, the 4-way valve is switched 10 seconds after the compressor’s

ON conditions are established, then 10 seconds after that, the compressor starts.

(i) Compressor protective start

1) Compressor protective start I is executed when the compressor starts.

2) Control contents a) The commanded speed is set at 42 rps 30 seconds after the compressor starts, and the increase in speed at this

time is 6 rps / 30 seconds.

b) 4 (2:Heating) minutes after the compressor starts, the speed is set at the target speed.

(ii) Compressor protective start

1) The first additional time the compressor starts after the power is turned ON, compressor protective start

is ex-

ecuted.

2) Control content a) Momentary stop judgment control

When 3 minutes have passed since the power was turned ON, the following judgment is implemented.

i) When the discharge pipe temperature (Tho-D) is 15°C or more higher than the outdoor air temperature

(Tho-A), it is judged that an instantaneous stop is required. This control is stopped and the compressor is started under compressor protective start I.

ii) When the discharge pipe temperature (Tho-D) is less than 15°C above the outdoor air temperature (Tho-A),

control changes to the operation mode judgment control in item b).

Note (1) The compressor is not started for 3 minutes after the power supply is ON.

b) Operation mode judgment control

Control changes to the following control required from the indoor units or in accordance with the SW5-4 setting (switching between cooling/heating) in test run control.

● When in the cooling and dehumidifying mode, control is switched to cooling start conditions judgment control

in item i).

● When in the heating mode, control is switched to high dilution operation prevention control in item v).

i) Cooling start conditions judgment

If any of the following conditions is established, control is switched to low speed operation control in item iv). Also, if none of these conditions is established, control is switched to high dilution operation prevention control in item ii). Conditions

1 6 hours have passed since the power was turned ON. 2 The outside temperature (Tho-A) is 5ºC or higher.

ii) High dilution operation prevention control

If any of the following conditions is established, operation changes to forced heating operation in item iii). Conditions

1 30 minutes have passed since the power was turned ON. 2 SW8-2 (Compressor dilution timer cancel) is ON.

iii) Forced heating operation

1 In the heating mode, the speed is set at the starting speed in compressor protective start I, 42 rps, and at

this time, the speed is increased by 6 rps every 30 seconds.

2 2 minutes after starting, operation is in accordance with the target speed, but if the compressor stops

during this control (including when the remote control is used to turn it OFF), this control is repeated.

3 After 10 minutes, control is switched to low speed operation control in item iv).

iv)Low speed operation control (Cooling, Dehumidifying mode)

1 Compressor protective start I is implemented at the following compressor speeds and times.

Specified speed: 20 rps, Time: 10 min.

Note (1) During this control, if the compressor is stopped using a remote controller, etc., this control is repeated.

2 This control ends after 10 minutes of operation. 3 If the conditions of the following are established, it is judged that the service valve is

closed and abnormal stop occurs (E49).

● When the low pressure sensor (LPT) measures 0.079 MPa or lower continuously for 15 seconds.

v) High dilution operation prohibition control (Heating mode)

If any of the following conditions is established, control changes to the low speed operation control in item vi).

● 30 min. has passed since the power was turned ON.

● SW8-2 is ON (for emergency measures)

vi) Low speed operation control (Heating mode)

1 Compressor protective start I is implemented at the following compressor speeds and times.

Specified speed: 42 rps, Time: 10 min.

Note (1) During this control, if the compressor is stopped by the remote controller, etc., this control is repeated.

2 This control is stopped after 10 minutes of operation. 3 If the high pressure switch (63H1) is turned OFF, it is judged that the operation valve is closed and an

abnormal stop (E40) occurs.

(d) Outdoor unit fan control

(i) Contents of fan tap and fan motor control during control

850

810

740

600

400

200

870

760

650

500

350

200

Unit:

min

-1

Model

Fan tap

302 series

6th speed

5th speed

4th speed

3th speed

2th speed

1th speed

Cooling

Heating

(ii) Fan tap control when started

1) During heating and defrosting fan control

a) The outdoor unit’s fan is started in 4th speed simultaneously with the start of compressor operation. b) After 20 seconds of operation in 4th speed, outdoor fan control in item (iii) is executed.

2) During cooling, dehumidifying

a) When the outdoor air temperature (Tho-A) is 20°C or higher, the outdoor unit fan starts simultaneously with the

compressor. The fan tap runs in 4th speed when starting and after 20 seconds, outdoor unit fan control in item (iii) is executed. (Normal control)

b) When the outdoor air temperature (Tho-A) is lower than 20°C, the outdoor unit fan starts 10 seconds after the

compressor starts. The fan tap runs in 3rd speed when starting and after 20 seconds, outdoor unit fan control in item (iii) is executed.

c) When the outdoor air temperature (Tho-A) is lower than 10°C, the outdoor unit fan starts 10 seconds after the

compressor starts. The fan tap runs in 2nd speed when starting and after 20 seconds, outdoor unit fan control in item (iii) is executed.

d) When the outdoor air temperature (Tho-A) is less than –5°C, the outdoor unit fan starts 10 seconds after the

compressor starts. The fan tap runs in 1st speed when starting and after 20 seconds, outdoor unit fan control in items (iii) and (iv) is executed.

(iii) Outdoor unit fan control

1) Fan tap control during cooling and dehumidifying

The fan tap’s speed is changed in accordance with the outdoor unit heat exchanger temperature (Tho-R1) and

outdoor air temperature (Tho-A).

A Zone

a Zone

b Zone

c Zone

d Zone

6th Speed

5th Speed

4th Speed

3th Speed

B Zone

6th Speed

5th Speed

4th Speed

3th Speed

C Zone

5th Speed

4th Speed

3th Speed

2th Speed

D Zone

A Zone

B Zone

C Zone

D Zone

a Zone

b Zone

c Zone

d Zone

4th Speed

3th Speed

2th Speed

1th Speed

15 18

30 37

46 48

20 30

33 40

43 53

Outdoor air temperature (˚C)

Outdoor heat exchanger temperature (˚C)

2) Fan tap control during heating

The fan tap’s speed is changed in accordance with the outdoor unit heat exchanger temperature (Tho-R1) and

outdoor air temperature (Tho-A).

2th Speed

3th Speed

4th Speed

3th Speed

4th Speed

5th Speed

4th Speed

5th Speed

6th Speed

12 15

-2 0

a Zone

b Zone

c Zone

A Zone B Zone C Zone

A Zone

B Zone

C Zone

a Zone

b Zone

c Zone

Outdoor air temperature (˚C)

Outdoor heat exchanger temperature (˚C)

3) Snow protection fan control

When DIP switch (SW3-2) on the outdoor unit’s control PCB is ON or when in the stop mode or the abnormal stop

mode, the outdoor unit’s fan runs at 4th speed for 1 minute and 30 seconds every ten minutes in accordance with the

outdoor air temperature (sensed by Tho-A).

4) Cautions concerning outdoor unit fan start control

Before the compressor starts, if the outdoor unit’s fan runs for 400 min

-1

or longer (including in reverse), the com-

pressor may run by itself without the outdoor unit fan starting. This is not a breakdown.

5) If the outdoor unit’s fan motor is sensed to be abnormal

a) If the compressor is ON and the outdoor unit fan motor is turning at 100 min

-1

or less or is turning in reverse for

30 seconds or longer, the compressor stops instantly. After the compressor is stopped for 3 minutes, if the

thermostat’s ON conditions are established, the compressor starts.

b) If it is detected 5 times within 60 minutes after the first detection, an abnormal stop (E48) occurs.

OFF

Outdoor air temperature (˚C)

6) Outdoor unit fan control by power transistor cooling fan temperature

If all the following conditions are established 3 minutes after the compressor starts, the following control is imple-

mented.

a) Cooling, Dehumidifying

● Outdoor air temperature Tho-A

> =

33°C

● Actual compressor speed

> =

60 rps

● Power transistor cooling fan temperature

> =

80°C

b) Heating

● Outdoor air temperature Tho-A

> =

16°C

● Actual compressor speed

> =

70 rps

● Power transistor cooling fan temperature

> =

80°C

c) Control contents

i) The outdoor unit fan tap speed is increased by 1 speed.

ii) When sampling is done once every 60 seconds and the power transistor cooling fan temperature (Tho-P)

value is as follows.

1 If the power transistor cooling fan temperature (Tho-P) is

80°C, the outdoor unit fan tap’s speed

increases by 1 speed.

2 If 80°C > the power transistor cooling fan temperature (Tho-P)

> =

75°C, the current outdoor unit fan tap

speed is maintained.

3 If the power transistor cooling fan temperature (Tho-P) is

< =

75°C, the outdoor unit fan tap speed is

lowered by 1 speed.

d) End conditions

When the conditions in item 3 above and the outdoor unit fan tap speed determined in item (i) are sensed 2

times in succession.

(e) Outdoor unit fan control during cooling when the outdoor air temperature is low

(i) When cooling or defrosting, if the outdoor air temperature (Tho-A) is in Zone B and when the outdoor unit’s fan has run

for 20 seconds since starting and is running at 1 speed, the outdoor unit’s fan speed is controlled in accordance with the

outdoor heat exchanger temperature (Tho-R1).

(ii) If the rotational speed drops, the speed is held constant for 20 seconds, then if the conditions in (i) exist after 20 seconds,

the speed is lowered further. The same is true in the case that the speed is increased. The speed is held constant for 20

seconds, then if the conditions in (i) exist 20 seconds later, the speed is increased further.

● Speed lower limit: 130 rpm

● Speed upper limit: 500 rpm

510

Outdoor unit fan speed +10min

-1

Outdoor unit fan speed

-10min

-1

Retention

Outdoor heat exchanger temperature (˚C)

A Zone

B Zone

Outdoor air temperature (˚C)

-20

-25

-23

-21

-17

-15

-10

-5

-2

-15 -10 -5 0 5 6 10-20-23

Outdoor heat exchanger temperature (˚C) [Tho-R]

Outdoor air temperature (˚C) [Tho-A]

Defrosting operation start temperature (SW3-1 ON)

Defrosting operation start

temperature zone

Defrosting operation start temperature (Standard)

-20

-25

-30

-31

-24

-15

-10

-8

Inteke gas saturation temperature (˚C) [SST]

outdoor air temperature (˚C) [Tho-A]

-35

-15-18 -10 -5 0 5 6 10-25 -20

Defrosting operation start temperature (Standaed)

Defrosting operation start temperature (SW3-1 ON)

Defrosting operation start

temperature zone

(f) Defrosting

(i) Defrosting start conditions

If all the following defrosting conditions A and B

are satisfied, defrosting operation starts.

1) Defrosting conditions A

a) If 30 minutes of cumulative compressor op-

eration passes and after defrosting ends

and if there is 37 minutes of cumulative

compressor operating time after heating

begins (with the remote control ON).

b) 5 minutes passes after the compressor goes

ON.

c) 5 minutes passes after the outdoor unit fan

runs.

d) After all the above conditions are satisfied,

if the temperature sensed by the outdoor

heat exchanger thermistor (Tho-R1) and

outdoor air temperature thermistor (Tho-A)

remains at the defrosting start temperature

or lower as shown in the figure at right for

15 seconds continuously, or the intake gas

saturation temperature (SST), obtained

from the low pressure sensor’s (LPT) de-

tected value and outdoor air temperature

(Tho-A) are within a range that is below

the defrosting start temperature range

shown in the figure at right for 3 minutes.

However, when 10 minutes have passed

since the compressor started and the out-

door air temperature is as shown in the fol-

lowing figure.

LPT Disabled

LPT Detecting

Outdoor air temperature (˚C)

2) Defrosting conditions B

a) The conditions for ending the previous defrosting operation are a defrosting operation time up and a heating

operation after a compressor running time of 30 minutes after defrosting ends.

b) 5 minutes have passed since the compressor started.

c) 5 minutes have passed since the outdoor unit’s fan started running.

(iii) If any of the following conditions is established, this control ends and the fan runs at the fan tap set in item (d). (iii).

1) The outdoor air temperature (Tho-A) is in Zone A and the outdoor heat exchanger temperature (Tho-R1) is sensed to

be 30°C or higher continuously for 40 seconds or longer.

2) The outdoor unit’s fan speed is 500 min

-1

, and the outdoor heat exchanger temperature (Tho-R1) is sensed to be

30°C or higher continuously for 40 seconds or longer.

3) The outdoor heat exchanger temperature (Tho-R1) is sensed to be 45°C or higher continuously for 40 seconds or

longer.

(ii) Changing the defrosting start temperature

Turn the DIP switch (SW3-1) on the outdoor unit’s control PCB ON.

1) Defrosting condition A

After defrosting ends, 30 minutes passes cumulatively of the compressor running in a heating operation.

2) Defrosting condition B

After defrosting ends, 25 minutes passes cumulatively of the compressor running in a heating operation.

3) Other than items 1) and 2) above, other conditions are the same as the standard conditions.

(iii) Defrosting end conditions

If any of the following conditions is satisfied, the defrosting end operation starts.

1) 10 minutes and 20 seconds have passed since defrosting started.

2) When the outdoor heat exchanger temperature (sensed by Tho-R1, whichever one senses the lower temperature) is

12°C or higher continuously for 10 seconds.

(g) Compressor protective control

(i) Discharge pipe temperature control

If the discharge pipe temperature (Tho-D) after the compressor starts becomes higher than the set temperature, the compressor’s speed is controlled to suppress the rise in the discharge pipe temperature. If it rises still higher, the compressor is stopped.

1) Compressor speed control

2) Discharge pipe temperature abnormal

a) If the discharge pipe temperature has risen to 115°C or higher, the compressor is stopped. If it drops to 85°C or

lower, the compressor restarts automatically.

b) If the discharge pipe temperature is sensed to be 115°C or higher 2 times within a period of 60 minutes, or for 60

minutes continuously while the compressor is stopped, an abnormal stop (E36) is carried out.

Note (1) If the temperature does not drop to 85°C or lower continuously for 45 minutes after a discharge pipe temperature error occurs,

operation cannot be restarted. (This can be set using the remote controller.)

(ii) Power transistor temperature control

If the power transistor temperature (Tho-TR) rises to 85°C or higher, the compressor speed is controlled. If the power transistor temperature drops to 81°C or lower, this control ends and the speed protection cancel operation starts.

100 105

Reset

Retention

The speed is reduced once every minute

Discharge pipe temperature (˚C)

85 115

Compressor operation

Compressor stops

Discharge pipe temperature (˚C)

81 85

Reset

Retention

The speed is reduced once every minute

Power transistor temperature (˚C)

(iii) Current safe control

1) If the inverter inflow current (CT current) becomes higher than the following set value, the compressor’s speed is lowered. If the current is still above the set value after the speed is lowered, the speed is lowered still further.

2) If the current value drops to or below the cancellation value continuously for 3 minutes, this control is ended and the speed protection cancel operation is started.

(iv) High pressure control

1) Compressor speed control during heating If the compressor’s speed exceeds the speed in the following table, the compressor’s speed is controlled at the upper limit value in accordance with the indoor heat exchanger temperature (ThI-R1) during operation.

2) Compressor speed control during cooling If the compressor’s speed exceeds the speed in the following table, the compressor’s speed is controlled at the upper limit value in accordance with the outdoor heat exchanger temperature (Tho-R1) during operation.

3) Operation stop control according to indoor heat exchanger temperature If an indoor heat exchanger temperature (sensed by ThI-R1) of 65°C or higher is detected continuously for 2 seconds during compressor operation in the heating mode, the compressor’s speed is controlled. If the indoor heat exchanger’s temperature drops to 47°C or lower, this control ends and the speed protection cancellation operation starts.

4) Control according to the outdoor heat exchanger temperature

a) If an outdoor heat exchanger temperature (sensed by Tho-R1) that is higher than the set value is detected,

during compressor operation in the cooling mode, the compressor is stopped. When the temperature drops to or below the set value, compressor operation resumes automatically.

b) If the outdoor heat exchanger temperature exceeds the set value 5 times within a period of 60 minutes or

continuously for 60 minutes even when the compressor is stopped, the unit is subjected to an abnormal stop.

(E35).

Note (1) If an outdoor heat exchanger temperature abnormal stop occurs and the temperature does not drop to 51ºC or lower for 3 minutes

continuously, operation cannot be resumed.

5) Abnormality detected by the high pressure switch (63H1)

If the pressure rises and the high pressure switch (4.15 open/3.15 closed MPa) operates (opens) 5 times within 60 minutes or operates (remains open) continuously for 60 minutes even when the compressor is stopped, the compressor performs an abnormal stop (E40).

(v) Low pressure control (LPT)

1) Compressor speed protective control

a) If all the following conditions are satisfied 5 minutes or more after the compressor starts or after a defrost reset,

the compressor’s speed is lowered.

1 If the low pressure is 0.15 MPa or lower continuously for 10 seconds. 2 If the compressor speed is 20 rps or higher.

b) The low pressure is detected again 30 seconds later, and if it is lower than 0.15 MPa, the compressor speed is

lowered again.

c) If the low pressure becomes 0.189 MPa or higher, this control ends and the speed protection cancel operation

begins.

15(16)

Model

Set valve (A)

302 series

52 ~ 58

Model

Item

302 series

Indoor heat exchanger temp (°C)

Compressor rotational speed (rps)

52 ~ 58

Model

Item

302 series

Outdoor heat exchanger temp (°C)

Compressor rotational speed (rps)

Compressor operation

Compressor stops

Outdoor heat exchanger temperature (˚C)

Note (1) Values in ( ) show the values during heating.

2) Low pressure error detection a) If either of the following conditions is satisfied, the compressor is stopped.

1 If the low pressure is 0.079 MPa or lower continuously for 15 seconds after the compressor starts. 2 If the low pressure is 0.15 MPa after 10 minutes have passed since the compressor started and superheating

at 30°C continues for 60 seconds.

b) Operation resumes automatically when the low pressure becomes 0.227 MPa or higher. c) If the conditions in 1 or 2 of item a) above occur 3 times within 60 minutes or if the low pressure drops to

0.079 MPa or lower for 6 minutes or longer continuously, including when the compressor is stopped, the unit is subjected to an abnormal stop (E49).

(iv) High pressure ratio protection control

During a heating operation, the compressor’s speed is controlled in accordance with the low pressure (LPT) and indoor heat exchanger temperature (ThI-R1).

1) Start conditions When all the following conditions are satisfied a) 10 minutes have passed since the compressor started. b) The outdoor unit fan is ON and 10 minutes have passed since the outdoor unit fan started. c) 10 minutes have passed since defrosting ended. d) When the low pressure and indoor heat exchanger temperature detected values are within the control region

shown in the following figure for 30 seconds.

2) Control contents The compressor’s speed is lowered. 1 minute later, detection is repeated and if the conditions in item d) continue to exist, the speed is lowered still further.

3) End conditions When operation is outside the control region shown in item d) above for 6 minutes continuously.

(h)Inverter protection control

(i) Current cut control

This prevents overcurrent at the inverter. If the current exceeds the set value, the compressor stops. It restarts automatically 3 minutes later, but if the current is cut 4 times within a period of 30 seconds, an abnormal stop (E42) occurs.

(ii) Power transistor overheating protection

1) If the power transistor’s temperature rises to 110°C or higher, the compressor stops. If the temperature drops to 90ºC or lower after 3 minutes, the compressor restarts automatically.

2) If this operation is repeated 5 times within 60 minutes, or the temperature rises to 110°C or higher for 15 minutes continuously, an abnormal stop occurs.

(i) Open phase protection

If the voltage of either the L1, L2 or L3 phase is 0 V for 5 seconds continuously after the power is turned ON, it is judged that there is an open phase state in the power supply, and 1 second later, an abnormal stop (E34) occurs.

(j) Temperature thermistor (outdoor heat exchanger, outdoor air, discharge pipe, suction pipe) and low pres-

sure sensor disconnection sensing

(i) Outdoor heat exchanger temperature thermistor, outdoor air temperature thermistor, low pressure sensor

If the conditions on the following page are detected for 5 seconds continuously between 2 minutes to 2 minutes 20 seconds after the compressor goes ON, the compressor goes off. After a 3-minute delay, the compressor is restarted, but if this state is detected 3 times within a 40-minute period, an abnormal stop occurs.

Note (1) This is not detected during defrosting and for 3 minutes after defrosting.

0.150

0.425

Low pressure (MPa)

Control domain

Indoor heat exchanger

temperature (˚C)

● Outdoor heat exchanger thermistor: -50°C or lower

● Outdoor temperature thermistor: -30°C or lower

● Low pressure sensor: 0 V or lower, or 3.49 V or higher.

(ii) Discharge pipe temperature thermistor, suction pipe temperature thermistor

After the compressor goes ON, if the following is detected for 5 seconds continuously between 10 minutes and 10 minutes 20 seconds after the compressor goes ON, the compressor stops. After a 3-minute delay, the compressor is restarted, but if this state is detected 3 times within a 40-minute period, an abnormal stop occurs.

Note (1) This is not detected during defrosting and for 3 minutes after defrosting.

● Discharge pipe temperature thermistor: -10°C or lower

● Suction pipe temperature thermistor: -50°C or lower

(k)Test operation

(i) It is possible to operate the outdoor unit using SW5-3 and SW5-4 on the outdoor unit PCB.

Be sure to turn SW5-3 OFF when operation ends.

(ii) Test operation control

1) Operates the air conditioner at the predetermined maximum speed for each model.

2) Each protective control and abnormal sensing control is activated.

3) If the setting of SW5-4 is changed during trial operation, stop control is performed, and the compressor is stopped

temporarily, and operation is switched between cooling and heating.

4) Remote control settings and display during trial operation.

(l) Silent mode control

Silent operation according to the remote control function setting. (i) It runs at a speed that is lower than the outdoor fan control speed in item (d).

1) Fan tap during cooling and dehumidifying operation

2) Fan tap during heating

SW5-3

OFF

SW5-4

OFF

Cooling test operation Heating test operation

Normal or test operation end

The set temperature is 5ºC.

The set temperature is 30ºC.

Remote controller settings, display contents

Capacity

Item

Cooling test operation

Heating test operation

6th Speed

5th Speed

4th Speed

3th Speed

5th Speed

3th Speed

5th Speed

3th Speed

2th Speed

4th Speed

3th Speed

2th Speed

1th Speed

a Zone

b Zone

c Zone

d Zone

A Zone B Zone C Zone D Zone

3th Speed

4th Speed

3th Speed

5th Speed

3th Speed

5th Speed

6th Speed

a Zone

b Zone

c Zone

A Zone B Zone C Zone

(m) Pump down control

If the pump down switch SW9 is turned on for 2 seconds during an operation stop and abnormal stop (not including when the

thermostat is OFF), pump down operation starts. (It is disabled during indoor unit operation. It is enabled during an abnormal

stop of the indoor unit and during power OFF.)

(i) Control contents

1) Close the liquid side service valve. (Leave the gas side fully open.)

2) In the cooling mode, set the target speed at 62 rps and start the compressor.

3) The red and green indicators (LED) on the outdoor unit’s control PCB keeps flashing.

4) Except for low pressure control, each protective and abnormal sensing control is enabled.

5) The outdoor fan is controlled the same as normal.

6) The electronic expansion valve (cooling, heating) is fully opened.

7) The solenoid valve (SV1) goes on for 2 minutes after the pump down operation starts and after that, it goes OFF.

(ii) Control end conditions

Stop control is executed according to any of the following conditions.

1) A low pressure of 0.087 MPa or lower is detected continuously for 5 seconds.

a Red LED: On, Green LED: flashing, Remote controller: displays stopped. b Restarting is possible when low pressure exceeds 0.087 MPa. c The electronic expansion valves (cooling, heating) remain fully open.

2) Stop according to error detection control

a Red LED: On, Green LED: flashing is displayed. b Restarting is not possible. ordinary operation is restored by resetting the power supply. c The electronic expansion valves (cooling, heating) remain fully open.

3) When the cumulative compressor operating time by pump down control is 5 minutes.

a Red LED: Off, Green LED: flashing, Remote controller: Stop. b Pump down repeat is possible. c The electronic expansion valves (cooling, heating) remain fully open.

Note (1) Close the gas side operating valve after the compressor stops.

Caution: If the pump down switch is pressed, communications with the indoor units is cancelled, so the message

“communications error – E5” is displayed on the indoor unit and the remote controller, but there is no error.

1.5 APPLICATION DATA

SAFETY PRECAUTIONS

• Please read these “Safety Precautions” first then accurately execute the installation work.

• Though the precautionary points indicated herein are divided under two headings,

WARNING and CAUTION , those

points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the

WARNING

section. However, there is also a possibility of serious consequences in relationship to the points listed

in the

CAUTION

section as well.

In either case, important safety related information is indicated, so by all means, properly observe all that is mentioned.

•

After completing the installation, along with confirming that no abnormalities were seen from the operation tests, please explain operating methods as well as maintenance methods to the user (customer) of this equipment, based on the owner’s manual. Moreover, ask the customer to keep this sheet together with the owner’s manual.

WARNING

● Installation should be performed by the dealer or a company speciallizing in this type of installarion. If you install the equipment

yourself, installation errors could result in water leaks, electric shock, and/or a fire, as well as other hazards.

● Conduct installation work in accordance with the instructions in this installation manual. Installation errors could result in water leaks,

electric shock, or fire.

● Sling the unit at the specified points with ropes properly rated for the weight in liftting it for portage. An improper manner of portage can

result in a fail of the unit resulting in an accident invoiving personal death or injury.

● When installing a unit in a small rooms, take measure so that if the refrigerant leaks, it does not exceed the concertration limit. For

information regarding measures to prevent the concertration limit from being exceed, please contact the dealer.

● It refrigerant leaks and the concentration limit is exceeded, suffocation could occur.

● Install the equipment in a location that can sufficiently suppor t the weight of the equipment. If the area is not strong enough, an

accident could result from the unit falling.

● Install the equipment in a location that can withstand strong winds, such as typhoons, and earthquakes. If the installation is not

secure, an accident could result from the unit falling.

● Always turn off power before work is performed inside the unit such as for installation or servicing. A failure to observe this instruction

can cause a danger or electric shock.

● Electrical work should be done by a licensed electrician who shall do the work in accordance with the Technical Standards Regard-

ing Electrical Equipment. Indoor Wiring Provisions, and this installation manual. The electrician shall use specified circuits for the equipment. If the power supply circuit capacity is insuficient or the work is not done correcty, it could result in electric shock or a fire.

● For wiring, the specified cable should be used, the connections should be secure, and the fixtures shall be strong enough to prevent

cables from being pulled out from the terminal connections. Incorrect connections or work fixtures could result in heat generation or a fire.

● In cabling, arrange cables suitably so that they may not get off their support and then fix the service panel securely. Improper installation

can cause heat generation and a resultant fire. Please prevent any substance other than the specified refrigerant (R410A) such as air from entering the refrigerant cycle in installing or moving the air conditioning system. Contamination by air or a foreign substance can cause an abnormal pressure build-up inside the refrigerant cycle and a resultant explosion and personaly injury.

● Use only par ts supplied with the unit and specified supply parts for installation. The use of unauthorized parts may cause the leaking

of water or electricitly causing a danger of electric shock or a fire, a refrigerant leak, performance degradation, and control failures.

● Do not open operation valves (either liquid or gas or both) until refrigerant piping, an air-tightness test and an air purge are completed.

When a leak of refrigerant gas occurs during piping work, stop brazing pipes and ventilate the room. Refrigerant gas, when it comes into contact with bare fire, can generate a toxic gas.

● When installation is completed, check for refrigerant gas leaks. If the refrigerant gas leaks indoors, it could come in contact with a tan

heater, burner, or hot plate, which could generate a poisonous gas.

CAUTION

● Ground the equipment. Do not connect the ground wire to gas piping, water piping, a lightning rod, or telephone ground

wires. It grounding is not performed correctly electric shock could occur.

● Depending on the installation location, a circuit breaker may need to be installed. It a circuit breaker is not installed, electric shock

may occur.

● Please follow this manual faithfully in performing installation work. Improper installation work can cause abnormal vibrations and

noise generation.

● Do not install the equipment in areas where there is danger of flammable gas leaks. It such gas does leak it could collect around the

units and cause a fire.

● Install the drain piping in accordance with the installation manual so that it properly discharges waste water and is maintained at a

temperature that prevents condensation.

● Do not install the outdoor unit where winds from its fan blow directly onto a plant, etc. Winds can affect adversely to the plant, etc.

● Secure a space for inspection and maintenance as specified in the manual. An insufficient space can result in an accident such as

a fall from the installation point and a resultant personal injury.

● When the outdoor unit is installed on a roof or at an elevated point, provide permanent ladders and handrails along the access route

and fences and handrails around the outdoor unit.

● In tightening a flare nut, use a double spanner and observe the specified tightening torque. Care must be taken so as not to over-

tighten a nut and damage the flare part. (Please refer to the tightening torque) The loosening or damage of the flare part can cause a refrigerant gas leak and a resultant lack-of-oxygen accident.

● Please dress the refrigerant piping with a heat insulation material for prevention of dew condensation. Improper heat insulation for

prevention of dew condensation can cause the leaking or dripping of water and a resultant soaking of household effects.

● When refrigerant piping is completed, check its air-tighteness with nitrogen gas to make sure it does not have a leak. A leak of

refrigerant gas in a narrow room beyond the safety limit concentration can cause a lack-of oxygen accident.

● If the humidity exceeds 80% or the drain or piping become clogged, condensation from the indoor unit could drip and cause damage.

Please do not install the indoor units above items of furniture, etc. that you do not want to get wet. Also, do not place items that you do not want to get wet underneath the indoor units.

1.5.1 Installation of indoor unit

(1) Ceiling recessed type (FDT)

(a) Selection of installation location

1) Select location where the space above ceiling is larger than those mentioned

right side and perfect draining can be assured.

2) With the customer’s consent, select a location with following suitable condi-

tions.

a) Where cool air or hot air can easily pass through.

If the height of the location exceeds 3 m, hot air will gather in the ceiling. Suggest to the customer to also install a

circulator.

b) Where water can be completely drained. A sloping location for drainage.

c) Where there are no wind disturbances to the suction inlet and blowing outlet, where the fire alarm will not be set off

erroneously, where no short circuits occur.

d) Where there is no direct sunlight.

e) Where the dew point temperature is below 28°C and the relative humidity is below 80%.

The unit has been tested according to JIS dew point conditions and has been confirmed to operate without

any problems. However, if the unit is operated in an environment with the humidity higher than the above

limit, water condensation may occur. Accordingly, all pipes and drain pipes should be further covered with

insulation materials of 10 - 20 mm thick.

3) Consider the supporting strength of the location. If the strength is not sufficient to sustain the unit weight, use reinforcing

materials.

(b) Installation space for unit

a) When a sufficient interval cannot be secured between the unit and a wall

or another unit, shut up diffusers on that side to block winds and make

sure that no short-circuiting is occurring. (A wind blocking material is

available as an optional part)

• Do not use the unit in the “Lo” wind mode when winds are blown into

two or three directions.

b) When the unit has 2500 mm or less clearance, attach a fan guard (option

part) on the intake side of the fan.

FDTA301R

Model Space above ceiling

Over 290mm

1‚000 or more

(mm)

Obstacle

2‚500 or more

• Installation space

Gas tube connecting port

Liquid tube connecting port

Drain line connecting port

Power intake

Hanging bolt

()

Drain hose piece (Accessory)

(Installed at site)

840

212

35 270

187

137

332

637

422

420

310

267

860~890(Ceiling hole size)

780(Suspension bolts pitch)

675(Suspension bolts pitch)

Control box

or more

Lug for suspension bolts

Model

FDTA301R

Item

Dimensions

4000

Note (1) In the case of neighboring installations, sepa-

rate the units by the following dimensions or greater.

● Please arrange four sets of a suspension bolt (M10 or M8), a nut matching the bolt, a flat washers and a spring washer on

the installation site.

When suspension from the ceiling

1) In the case of the standard series: Cut and opening of ▫860 ~ ▫890. In cutting an operating on the ceiling, use the unit’s cardboard container for shipment as a reference of the size of opening.

● The center of the opening on the ceiling must accord with the center of the unit.

2) Determine the positions of suspension bolts (675780).

3) Use four suspension bolts, each fastened in such a manner that it can withstand pull force of 50 kgf.

4) Make suspension bolts to the length that leaves approximately 70 mm of them above the ceiling.

5) After hoisting in the unit, attach level gauges supplied as accessories and determine the unit position (height).

6) Use a transparent tube with water filled inside to check the level of the unit. (A tolerable height difference at an end of the

unit is within 3 mm)

When embedded into ceiling

1) Determine the positions of suspension bolts (675780).

● The pitch center of a suspension bolt must accord with the center of the unit.

2) Use four suspension bolts, each fastened in such a manner that it can withstand pull force of 50 kgf.

3) In cutting an opening on the ceiling, use the unit’s cardboad container for shipment as a reference of the size of opening.

4) Fix the unit as per A-5 and 6 above.

● The unit’s cardboard container for shipment can be used to cover the indoor unit.

Note (1): When a hanging bolt exceeds 1.3 m in length, use an M10 bolt and give it reinforcements such as braces.

Refrigerant piping

Drain

bolt

Suspension

Nut

Washer

Spring Washer

Main

body

Level gauge

10~25

33~38

Supply air grill

Adjust so that the level gauge surface and the lower surface of ceiling are in matching.

Fix the level gauge in alignment with this face of supply air grill.

Ceiling material

Level gauge (insulation)

Indoor unit

Hose

Drain socket

Clamp (accessory) No adhesive allowed

Pipe cover (large) [for insuation] (accessory)

Joint for VP25 (not included)

Drain hose piece (accessory)

Indoor unit

Adhesion

Pipe cover (small) [for insuation] (accessory)

Pipe cover [for insuation] (not included)

VP25 (not included)

Drain hose piece

Stepped part

Drain socket

1) Glue the drain hose supplied as an accessory and a VP-25 joint before

lifting the unit.

2) The drain hose is to provide a buffer to absorb a slight dislocation of the

unit or the drain piping during installation work. If it is subject to abuse

such as being bent or pulled deliberately, it may break, which will result

in a water leak.

3) Care must be taken so as not to allow an adhesive to run into the drain

hose. When it is hardened, it can cause a breakage of a flexible part, if the

flexible part receives stress.

4) Use VP-25 general-purpose hard PVC pipes for drain piping.

5) Insert the drain hose supplied as an accessory (soft PVC end) to the stepped

part of the unit’s drain socket and then fasten it with the clamp also sup-

plied as an accessory.

6) Adhesive must not be used.

a) Glue a VP-25 joint (to be procured locally) to joint it with the drain

hose (hard PVC end) and then glue a VP-25 (to be procured locally)

to the joint.

(d) Drain Piping

b) Give the drain piping a descending grade (1/50-1/100) and never

create a bump to go over or a trap.

c) In connecting drain pipes, care must be taken so as not to apply force

to the unit side piping and fix the pipe at a point as close to the unit as

possible.

d) Do not create an air vent under any circumstances.

e) When drain piping is implemented for more than one unit, provide a

collecting main about 100 mm below the units’ drain outlets from

which it collects drain. Use a VP-30 or larger pipe for a collecting

main.

f) Do not fail to provide heat insulation at the following two points be-

cause they can cause dew condensation and a resultant water leak.

7) Drain socket

After a drain test is completed, apply a pipe cover (small: accessory)

onto the drain socket, cover the pipe cover (small), the clamp and part of

the drain hose with a pipe cover (large: accessory) and wrap it with a tape

completely without leaving any gaps.

(Cut pipe covers into appropriate shapes)

8) Hard PVC pipes laid indoor

a) Since a drain pipe outlet can be raised up to 700 mm from the ceil-

ing, use elbows, etc. to install drain pipes, it there are obstacles pre-

venting normal drain pipe arrangement. When the drain pipe is raised

at a point far from a unit, it can cause an overflow due to a back flow

of drain upon stoppage, so arrange piping to keep the dimensions

specified in the illustration shown on the left.

b) Install the drain pipe outlet where no odor is likely to be generated.

c) Do not lead the drain pipe into a ditch where the generation of harm-

ful gas such as sulfuric gas or flammable gas is expected. A failure to

observe this instruction may cause such harmful or flammable gas to

flow into the room.

1.5 m ~ 2 m

Suspension bolts

Desceding slope greater than 1/100

Insulation material

No bump

Air vent

No trap

Not touching the water

As wide as possible (about 100 mm)

VP30

Joint for VP-25 (not included)

Desceding slope greater than 1/100

295 ~ 325 mm 100 mm or less

Drain hose

700 mm or less

Trapped air will generate noises.

Drainage test

1 Check that water is draining thoroghly during test run, and that there are no water leaks from the joints and the drain pan. 2 The test has to be performed even if the unit is installed in the season when the unit is used for healting. 3 In a new house, perform the test before the ceiling is fitted.

• Using a water pump, pour about 1000 cc of water to the drain pan through

the blowing outlet.

• Check the transparent drain-out section of the drain hose for normal flow

of drainage.

* While observing the noise from the drain motor, test drain operation.

•Take off the drain plug to release the water. After the water is drained, place

the drain pulg back where it was..

* Be careful not to get splashed when pulling the drain plug.

Forced drain pump operation

 Setup from a unit side.

1 Turn power on after selecting the emergency operation mode with a setting on the indoor unit control PCB (SW9-3 ON) and

disconnecting the CnB connector on the board. Then, the drain pump will start a continuous operation 15 seconds later.

(Note: The blower will also start operation in tandem)

2 When a drain test is completed, reinstate the setting to cancel the emergency operation mode (SW9-3 OFF) and plug in the

CnB connector on the board.

(When electrical work is not completed, connect a convex joint to the drain pipe joint area, arrange an inlet and check leaks and

drain connections of the pipe)

Put the tip of the feed water pump in the drain pan of the unit body

Drain plug

 Setup from a remote controller side.

Drain pump operation from a remote controller unit is possible. Operate a remote controller unit by following the steps

described below.

1. To start a forced drain pump operation.

1 Press the TEST button for three seconds or longer.

The display will change from “

SELECT ITEM ”

“

SET ”

“

TEST RUN

”

2 Press the

button once while “ TEST RUN

” is displayed, and cause “ DRAIN PUMP ” to be displayed.

3 When the SET button is pressed, a drain pump operation will start.

Display: “ DRAIN PUMP RUN ”

“

STOP ”

2. To cancel a drain pump operation.

4 If either SET or ON/OFF button is pressed, a forced drain pump operation will stop.

The air conditioning system will become OFF.

(e) Panel installation

1) Accessories

2) Confirm the unit’s installation level.

• Make sure from the level gauge (insulation) packed

with the air conditioner unit that the installation

height of the unit and the dimensions of the open-

ing in the ceiling are correct.

• Confirm the installation level of the air conditioner

unit and ceiling material.

•Affix the level gauge included with the air condi-

tioner unit and fix the unit’s installation height.

• Remove the level gauge before installing the unit.

•The unit’s installation height can be minutely ad-

justed by means of the corner openings after the

panel is installed. (For details, see 6) “Installing

the Panel.”)

Note (1) : If the installation level of the air conditioner unit and ceiling material exceed the proper range, it will cause an undue load to be broken during

installation of the panel and could cause damage.

3) Unit installation direction and panel and air return grille direction

(a) The unit and panel installation orientation is directional.

• Match up the outlet (small) parts with the refrigerant piping direction.

• Make sure of the motor and switch connector connection directions.

(b) The panel and air return grille installation orientation is not directional.

If you are changing the direction of the air return grille, change the panel’s striker installation position to the “Pull”

character position direction on the surface of the grille.

Name Quantity

Air inlet grille

Air filter

Suspension bolts

Adjust so that level gauge surface and the lower surface of ceiling arc in matching

33~38 mm

Level gauge (insulation)

Ceiling material

Supply air grill

Fix the level gauge in aligament with this face of supply air grill.

10~25 mm

Screw

Corner panel

Dirt collects

Air leakage at ceiling

Air leakage

Condensation forms, condensation drips

Adjust so there is no gap.

4) Removing the air return grille

1 Raise up the notched portion of the air return grille and open it.

2 With the air return grille open, remove the air return grille hinge from the decorator panel.

5) Removing the corner panel

•Take out the screw in the corner, then lift up the corner panel in the arrow direction and remove it.

6) Panel installation

1 Screw in lightly 2 of the 4 air conditioner unit suspension bolts in opposite corners from each other by about 5 mm.

(Fasten the drain piping side and the opposite corner temporarily.)

2 Hang the panel on the two suspension bolts to install it temporarily.

3 Install the two remaining suspension bolts and tighten all four of the bolts.

Carry out minute adjustments by turning the indoor unit’s nut using a spanner or similar tool from the corner opening.

Note (3) : The unit’s installation height can be minutely adjusted with the decorator panel as is as long as the indoor unit is level and drain piping are

not affected.

Notes (1) : If the suspension bolts are not tightened sufficiently, it

could cause the following trouble, so tighten the bolts

securely.

Note (2) : If there is still a gap between the ceiling and the decorator

panel even after the suspension bolts are tightened, readjust

the height of the indoor unit.

 

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

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Louver

Louver motor

Connector

Louver motor

4 Connect the (white, 5p) louver motor con-

nector.

5 Place each of the connectors inside the con-

trol box.

Note (1) : If the air outlet louver does not operate using

the remote controller, check the connector’s

connection, then turn the main power supply

OFF for 10 seconds or longer and turn the

power ON again.

7) If the vertical air-flow direction is fixed

• This decorator panel is designed so that you can fix the vertical air-flow direction at each air supply to match the

environment at your installation location. Set it as required by the customer. Furthermore, when the vertical air-flow

direction is fixed, remote control operation and all automatic controls are disabled. The actual setting may also differ

from the LCD display in the remote controller.

1 Turn off the main power supply (turn it off at the ground fault circuit breaker).

2 Disconnect the connector to the louver motor at the air supply you want to fix the position of.

Wrap vinyl electrical tape around the disconnected connector to insulate it.

3 Slowly move the vertical air-flow louver you want to fix the position of by hand and set the vertical air-flow

direction so that it is within the range shown in the table below.

Note (1) : Do not set the position outside this range.

Doing so causes condensate to drip and to form as well as dirtying of the ceiling surface, and could cause abnormal operation.

Vertical air-flow

direction criterion

L Dimension (mm)

Horizontal 30º

36.5

Downward 70º

22.5

* It can be set anywhere desires as long as it is within a range of 22.5 and 36.5 mm.

Screw

Claws

8) Corner panel installation

1 Hook the corner panel strap to the pin on the decorator panel as shown in the figure.

2 Insert part a on the corner panel in part A on the decorator panel, then fit the 2 claws and fasten the corner panel

screw.

9) Installing the air return grille

• Install the air return grille by following the removal procedure (item 4) in reverse order.

Note (1) : Match up the installation position of the panel’s striker and the “Pull” character position direction on the surface of the grille. If these do not

match, the striker could be damaged.

(2) Ceiling suspended type (FDEN)

(a) Selection of installation location

1) A place where good air circulation and delivery can be obtained.

Cold air throw

Model

Air throw

FDENA301R

Unit : m

Conditions (1) Installation height: 2.4 ~ 3.0 m above the floor (2) Fan speed: Hi (3) Location: Free space without obstacles (4) Distance of reach indicates the horizontal distance after the wind touched down the floor. (5) Air velocity at the throw: 0.5 ( m/sec.)

2) A place where ceiling has enough strength to support the unit.

3) A place where there is no obstruction to the return air return and supply air supply ports.

4) Places exposed to oil splashes or steam (e.g. kitchens and machine plants). Installation and use at such places will incur deteriorations in the performance or corrosion with the heat exchanger or damage in molded synthetic resin parts.

5) A place where the space shown below may be secured.

5 or more

150 or more

Obstacle

300 or more

100 or more

Model

FDENA301R

Item

Dimensions

4500

Unit : mm

Ceiling mouting installation

Note (1) In the case of neighboring installations,

separate the units by the following dimensions or greater.

Side panel

Side panel screw (1 each on the left and right sides) (M4)

1) Remove the air return grille.

Slide the stoppers (4 places).

Filter

Take out the pins (4 or 6 places).

2) Remove the side panels.

Take out the screws, then slide the side panels in the arrow direction to remove them.

6) This unit uses a microcomputer as a control device. Therefore avoid installing the unit near the equipment that generates strong electromagnetic waves and noise.

(b) Wireless remote control unit operation distance.

1) Standard signal receiving range.

[Condition] Illuminance at the recelver area: 360 lux.

(When no llghting fixture is located with in 1 m of indoor unit in an ordinary office)

2) Points for attention in connecting a plural number of indoor units.

[Condition] Illuminance at the recelver area: 360 lux.

(When no lighting fixture is located within 1 m of indoor unit in an ordinary office)

When the remote control unit is used with the aforementioned interference-prevention setting, a minimum distance guaranteening the prevention of unintended unit responses is 5 m

a) Please operate remote control unit switches with the unit faced

correctiy toward the indoor unit's receiver section.

b) Effective operation distance can vary with the luminance around

the receiver and the reflection from walls of the room.

c) When the receiver is exposed to intensive light such as from the

direct sun or a strong light, it may become operable only from a short distance or unable to receive signals at all.

Floor sarface

1 m

2.4 m

Within 5 m

Wireless remote control unit

Ceiling sur face

(Top view)

5 m

60°

Receivalle range

(Top view)

5 m

60°

Receivable range

4) Suspension bolt position

a) Using the paper pattern supplied as an accessory as a

criterion, select suspension bolt positions and piping

hole positions, then install the suspension bolts and

make holes for piping. After positioning, remove the

paper pattern.

b) Keep strictly to the suspension bolt lengths specified

below.

(d) Installation

1) Fasten the suspension lugs to the suspension bolts.

Suspension lug screws (M4)

Suspension lug mounting bolt (M8)

Lug for suspension

Loosening margin 8~12 mm

Lug for suspension

Indoor unit

Paper pattern

Ceiling board

Lug for suspension

Suspension bolts

25mm or more

45mm or less

1320

1272

Air supply

2424

Wall

690

290215

Fasten the bolts to the front of the slotted holes.

Air supply

Flat washer (accessory parts)

Ceiling board

*Fasten it securely with double nuts.

Suspension bolts

Lug for suspension

Unit

*Double nuts

Flat washer (accessory parts)

Flat washer

Nut

*Double nuts

Suspension bolts

Lug for suspension

Unit

3) Remove the suspension lug.

Take out the screws, then loosen the installation bolt.

2) Attach the unit to the suspension lugs.

1 Slide the unit onto the suspension lugs from

the front, hanging it on the bolts.

2 Fasten the unit securely on the left and right

sides with 4 suspension bolts (M8).

3 Tighten the 2 screws (M4) on the left and right

sides.

Lug for suspension (M4)

Suspension bolts (M8)

Lug for suspension

After sliding the side panels on from the front to rear, fasten them securely with the screws.

(e) Refrigerant piping

1) Piping position

2) Piping connection position

Piping can be connection from 3 different directions. Remove the cutout from hole where the piping will be connected

using side cutters or similar tool. Cut a hole for the piping connection in the back cover according to the cutting margin

shown. Cut a hole in the ceiling side in accordance with the position of the piping. Also, after the piping is installed, seal

the space around the piping with putty, etc. to keep dust from getting inside the unit.

(In order to prevent damage to wires from the edges, be sure to use the back cover.)

(If the connection is on the left side, reverse the slope.)

(The figure shows the case where the drain hose is on the right side.)

0 ~ 3mm

Drain piping (right)

Unit : mm

235 (Liquid pipe)

195 (Gas pipe)

Liquid pipe

271

Slope inside

unit: 10 mm

110

135

Gas pipe

Drain piping (left)

109

Drain piping (For left)

Drain piping (For left back)

175

Top Cover

Unit : mm

Back cutout

Back cover

Cutting margin

Right side cutout

Top cutout

100

120

108

3127

(f) Drain piping

1) Drain piping can be connected from the back, right and left sides.

2) When installing drain piping, be sure to use the insulating material supplied for the drain hose and

drain hose clamp.

a) Connect the drain hose fully all the way to the base of the fitting.

b) Fasten the hose securely with the drain hose clamp.

c) Keep strictly within the lengths specified below for the suspension bolts.

3) If drain piping is installed on the left side, change the rubber plug and insulating material (tubular)

from the left side piping connection port to the right side.

Be careful that water doesn’t pour out when the drain plug is removed.

3) In order to make it easier for water to drain out, install the unit so that the water drain side slopes

downward.

● Left-right direction

● Front-rear direction

If the slope is reversed, there is danger of water leaking out.

Use the fitting supplied with the unit to connect the drain hose, fastening it at the lowest point so that there is no slack, and

establishing a 10 mm drain slope. * Keep electrical wiring from running beneath the drain hose.

Be sure to fasten the drain hose down with a clamp.

There is danger of water overflowing the drain hose.

WARNING

After piping has been installed, check to make sure water drains well and that there is no overflow.

Drain hose

Lowest Point

()

Drain hose Hose Clamp

It can be fastened from inside or outside the unit.

10mm

Avoidriding across an elevation

The drain hose should slope downward.

Keep free from trape

Do not pipe under water

(3) Satellite ducted type (FDUM)

(i) Selection of installation location

1) Avoid installation and use at those places listed below.

a) Places exposed to oil splashes or steam (e.g. kitchens and machine plants).

Installation and use at such places will incur deteriorations in the performance or corrosion with the heat exchanger or

damage in molded synthetic resin parts.

b) Places where corrosive gas (such as sulfurous acid gas) or inflammable gas (thinner, gasoline, etc.) is gnerated or

remains. Installation and use at such places will cause corrosion in the heat exchanger and damage in molded synthetic

resin parts.

c) Places adjacent to equipment generating electromagnetic waves or high-frequency waves such as in hospitals. Gener-

ated noise may cause malfunctioning of the controller.

2) Select places for installation satisfying the following conditions and, at the same time, obtain the consent on the part of

your client user,.

a) Places where chilled or heated air circulates freely. When the installation height exceeds 3m, warmed air stays close to

the ceiling. In such cases, suggest your client users to install air circulators.

b) Places where perfect drainage can be prepared and sufficient drainage gradient is available.

c) Places free from air disturbances to the return air port and supply hole of the indoor unit, places where the fire alarm

may not malfunction to short circuit.

d) Places with the environmental dew-point temperature is lower than 28˚C and the relative humidity is less than 80%.

( When installing at a place under a high humidity environment, pay sufficient attention to prevention of dewing such

as thermally insulating the unit properly.)

3) Check if the selected place for installation is rigid enough to stand the weight of thew unit.

Otherwise, apply reinforcement using boards and beams before starting the installation work.

620

Inspection space

830100

1300

(ii) Suspension

Be sure to observe the finished length of the suspension bolts given below.

472

986

1) Fixing the suspension bolt (customer ordered parts M10)

Securely fix the suspension bolt as illustrated below or in another way.

2) Adjusting the unit’s levelness

a) Adjust the out-levelness using a level vial or by the following method.

● Make adjustment so that the relation between the lower surface of the indoor unit proper and water level in the hose

becomes given below.

b) Unless the levelness is adjusted properly, the malfunction of the float switch will occur.

Insert

Hole in anchor bolt Hole-in plug

Suspension bolt M10

Concrete

Suspension bolt

M10 Washer

M10 nuts

Indoor unit

M10 Spring washer

Suspension bolt M10

Indoor unit

60mm or less

PVC hose

Piping side

Supply water

0 ~ 5 mm

Bring the piping side slightly lower

3) Blower fan tap switch

The following two methods are available in switching the blower

fan tap. Switch to the high-speed tap with one of these methods.

1 Set SW9-4 provided on the indoor unit PCB to ON. 2 By means of function setting from the remote control

unit, set the setting c of “I/U FUNCTION

”

(indoor unit function) to “Hi CEILING 1” (high-speed

tap) as shown right.

For the details of operating procedures, please refer to the installation manual of your remote control unit.

SW9-4

OFF

Fan control,high speed (High ceiling) Fan control

Function number A Function description B Setting C

Hi CEILING SET Hi CEILING 1

(iii) Duct installation

Return air duct (to be purchased locally)

Supply air duct (to be purchased locally)

Return air port with canvas duct (to be purchased locally)

Return air port (to be purchased locally)

Supply air port (to be purchased locally)

Heat insulation

Indoor unit

Access door

2 Access door

Access door must be provided without fail.

● Dimensions of access door and service space

( See exterior dimensions in page 11 )

1 Supply air duct

● 3-spot with

200 type duct are the standard specifications. Determine the number of spots based on following table.

● Use a band, etc. to connect the indoor unit and the supply air duct flange.

● Conduct the duct installation work before finshing the ceiling.

FDUMA302R

2 ~ 3-spot

(1)

Bad exampleBad example Good example

Notes (1) Shield the central supply air port for 2-spot.

● Limit the difference in length between spots at less than 2:1.

● Reduce the length of duct as much as possible.

● Reduce the number of bends as much as possible. (Corner R should be as larger as possible.)

3 Return air port

¡ When shipped, the return air port lies on the back.

¡ When connecting the duct to the return air port, remove the air filte if it is fitted to return air port.

¡ When placing the return air port to carry out suction from the bottom side, use the following procedure to replace the

return air duct joint and the bottom plate.

¡ Make sure to insulate the duct to prevent dewing on it.

4 Install the specitic supply air duct in a location where the air will circulate to the entire room.

¡ The duct connection is specific to the 200 circular duct.

¡ Conduct the installation of the specific supply air hole and the connection of

the duct before attaching them to the ceiling.

¡ Insulate the area where the duct is secured by a band for dew condensation

prevention.

Remove the screws which fasten the bottom plate and the duct joint on the return air port of the unit.

• Replace the removed bottom plate and duct joint.

• Fit the duct joint with a screw, fit the bottom plate.

•

Secure with a band,etc.

Supply air duct

5 Make sure provide an inspection hole on the ceiling. It is indispensable to service electric equipment, motor, functional

components and cleaning of heat exchanger.

6 If a duct is not provided at the return air side but it is substituted with the space over the ceiling, humidity in the space will

increase by the influence of capacity of ventilation fan, strength of wind blowing againat the outdoor air louver, weather

(rainy day) and others.

¡ Moisture in air is likely to condense over the external plates of the unit and to drip on the ceiling. Unit should be

operated under the conditions as listed in the above table and within the limitation of wind volume. When the building

is a concrete strucially immediately after the construction, humidity tends to rise if the space over the ceiling is not

substitued in place of a duct. In such occasion, it is necessary to insulate the entire unit with glass wool (25mm). (Use

a wire net or equivalent to hold glass wool in place.)

¡ It may run out the allowable limit of unit operation (Example: When outdoor air temperature is 35ºCD.B, return air

temperature is 27ºCW.B) and it could result in such troules as compressor overload, etc..

¡ There is a possibility that the supply air volume may exceed the allowable range of operation due to the capacity of

ventilation fan or strength of wind blowing against external air louver so that drainage from be heat exchanger may fail

to reach the drain pan leak outside (e.g. drip on to the with consequential water leakage in the room.)

Notice: Aspecific cover plate is available when changing the 4 spot to the 3 spot, or when changing the 3 spot to the 2 spot.

Note (1) Do not change from 2 spot to 1 spot.

Air conditioner indoor unit

r Supply air port

w Supply air duct

(optional or marketed item)

Ceiling surface

q Return air port (marketed item) (with air filter)

e Return air duct (marketed item)

t Inspection hole

Return air grille (Locality)

Return air grille (option)

Bad example of duct work

For ventilation

Louver to outdoor air

7 Return air duct: Use square duct.

8 Return air port with canvas duct

1) Connection of intake and exhaust ducts.

2) Duct connecting position.

< Outside air intake >

a) Use side air intake port.

b) In case of simultaneous intake and exhaust, the side air intake port cannot be used, therefore, take air from the

midway air intake port along the intake duct.

< Exhaust > Make sure to use suction as well.

c) Use a side exhaust port.

3) Duct connection

Use intake and exhaust duct flange of separately sold (for connection of

125mm round duct) to connect 125mm

round duct. The duct clamped by bands must be thermally insulated to prevent dew condensation.

Looking from top of unit

Exhaust port

Side fresh air intake port

Intake duct (square duct)

Outside air intake port midway of return duct

Fig.2Fig.1

(iv) Drain piping

1) Drain piping should always be in a downhill grade (1/50-1/100) and avoid riding across an elevation or makeing traps.

2) When connecting the drain pipe to the unit, pay suffcient attention not to apply excess force to the piping on the unit side.

Also, fix the piping at a point as close as possible to the unit.

3) For drain pipe, use hard PVC general purpose pipe VP-25

which can be purchased locally. When connecting, insert

a PVC pipe end securely into the drain socket before tight-

ening securely using the attached drain hose and clamp.

Adhesive must not be used connection of the drain socket

and drain hose (accessory).

1.5 m ~ 2m

Suspension bolts

Heat insulation

A downhill grade of 1/100 or more

Air vent

Avoid riding across an elevation

Keep free from traps

Do not pipe under water

Drain socket

Level difference part

Drain hose

Joint for VP-25 (local procurement)

Pipe cover (small)[insulation]

(accessory)

Drain socket

Indoor unit

Clamp (accessory)

Drain hose piece

(accessory)

Adhesion

VP-25 (local procurement)

Pipe cover [insulation] (local procurement)

Pipe cover (large)[insulation]

(accessory)

● Good piping

● Improper piping

9) Drainage test

a) During trial operation, make sure that drainage is properly execued and check that leakage is not found at connections.

b) Be sure to carry out a drainage test when installing the system during a heating season.

c) When installing the system in a building under construction, carry out the drainage test before ceiling tiles are in-

stalled.

Remove the grommet. Be sure to restro it to the original position after the test is over.

Insert a water filing hose by approx 50 mm and feed water. (Be sure to insert the water filing hose in a downward direction.)

4) When constructing drain piping for several units, position the common pipe about 100 mm below the drain outlet of each

unit as shown in the sketch below. Use VP-30 or thicher pipe for this purpose.

5) Be sure to provide heat insulation to hard PVC pipes of indoor placement.

6) Do not ever provide an air vent.

7) The height of the drain head may be elevated up to a point 600 mm from the bottom of unit and, when an obstacle exists

in the ceiling space, elevate the piping to avoid the obstacle using an elbow or corresponding gadget. When doing this, if

the stretch for the needed height is too high, the back-flow quantity of drain at the time of interruption of the operation gets

too much and it may cause overflow at the drain pan. Therfore, make the height of the drain pipe withing the distance

given in the drawing below.

8) Avoid positioning the drain piping outlet at a place where generation of odor may stimulated. Do not lead the drain piping

direct into a sewer from where sulfur gas may generate.

VP30

A downhill grade of 1/100 or more

Secure the elevation as high as possible (approx. 100 mm)

295 ~ 325

Drain hose

Right above

Joints for VP-25

600

(local maximum

height of drain head)

Unit : mm

1 Supply approx 1000cc of water through the outlet of the unit using a feed water pump.

2 Make sure that drainage is proceeding properly at the see-through outlet of the unit.

* Also confirm the revolving sound of the condensate motor when checking the drainage.

3 Then remove the drain plug at lower section of the unit to drain water off. After making sure water is not left, restore

the drain plug to the original position.

Forced drain pump operation

 Setup from a unit side.

1 Turn power on after selecting the emergency operation mode with a setting on the indoor unit control PCB (SW9-3 ON) and

disconnecting the CnB connector on the board. Then , the drain pump will start a continuous operation 15 seconds later.

(Note : The blower will also start operation in tandem)

2 When a drain test is completed, reinstate the setting to cancel the emergency operation mode (SW9-3 OFF) and plug in the

CnB connector on the board.

(When electrical work is not completed, connect a convex joint to the drain pipe joint area, arrange an inlet and check leaks and drain connections of the pipe)

 Setup from a remote controller side.

Drain pump operation from a remote controller unit is possible. Operate a remote controller unit by following the steps described

below.

1. To start a forced drain pump operation

1 Press the TEST button for three seconds or longer.

The display will change from “

SELECT ITEM”

“

SET”

“

TEST RUN

”

2 Press the

button once while “

TEST RUN

” is displayed, and cause “DRAIN PUMP ” to be displayed.

3 When the SET button is pressed, a drain pump operation will start.

Display: “DRAIN PUMP RUN”

“

STOP”

2. To cancel a drain pump operation.

1 If either SET or ON/OFF button is pressed, a forced drain pump

operation will stop.

The air conditioning system will become OFF.

)Drainage from the lower drain socket

Only if the drain pipe can be installed in a downhill grade

(1/50-1/100), the lower drain socket can be used for con-

necting to the drain pipe as illustrated.

(Disconnect the connector for the drain motor)

As shown in the sketch to the right, disconnect the drain

motor connector CnR ( blue color coding).

If the system is started with this connector connected as

is, drain water is discharged out of the upper drain socket

causing a heavy water lekage.

The upper drain socket

A hard PVC general-purpose pipe

Heat insulator

Rubber plug (Remove the rubber plug)

The lower drain socket

(Piping connection)

Disconnect Condensate motor connector CnR (2P Blue)

7) Use a cord clamp to attach the remote controller cord to the wall.

8) Set the functions according to the types of indoor unit. See Section “Function Setting’’.

(b) Recessed fitting

1) The Electrical box and remote controller (shield wire must be use in case of extension) are first embedded.

(1) Selection of installation location

Avoid the following locations

1) Direct sunlight.

2) Close to heating device.

3) Highly humid or water splashing area.

4) Uneven surface.

(2) Installation procedure

(a) Exposed fiting

1) Open the remote controller cover and unscrew the screw located beneath the switch.

2) Open the remote controller case.

• Put a screw driver (flat-head) into the concav-

ity made on the upper part of a remote controller and twist it lightly to open the casing.

3) The cord of a remote controller can only be pulled out in the upward direction.

• Cut off with nippers or a knife a thin walled

part made on the upper end of the rmote controller bottom casing, and then remove burrs with a file or the like.

4) Fix the remote controller bottom casing onto a wall with two wood screws supplied as accessories.

5) Connect the remote controller to the terminal block. Connect the terminals of the remote controller to the indoor unit with the same numbers. Because the terminal block has polarity, the device becomes inoperative if there are wrong connections.

Terminals: xRed wire, YWhite wire, ZBlack wire

• Use a cord of 0.3mm2 (recommended) -

0.5mm

(maximum) for a remote controller cord. Remove a sheathe of the remote controller cord for the section laid within the remote controller casing.

Thin walled part

Upper

Lower

Lower case

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Two M4 screws (Head diameter must be 8mm) (not included)

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 

        

2) Remote the upper case to the remote controller.

3) Attach the lower case to the Electricl box with two M4 screws. (Head diameter must be 8 mm). Choose either of the following two positions in fixing it with screws.

4) Connect the remote controller cord to the remote controller. Refer to [Exposed fitting].

5) Installation work is completed by replacing the top casing onto the bottom casing as before.

6) Set the function switch according to the type of the indoor unit. (Refer to 76 page)

Precation in extending the remote controller cord Maximum total extension 600m. The cord should be a shielded wire.

● For all types : 0.3mm

× 3 cores

Note (1) Use cables up to 0.5mm2 (maximum) for those laid inside

the remote controller unit casing and connect to a different size cable at a vicinity point outside the remote controller unit, if necessary.

100.Within 100-200m…………0.55 mm

× 3 cores

Within 300m…………0.75 mm

× 3 cores

Within 400m…………1.25 mm

× 3 cores

Within 600m…………2.05 mm

× 3 cores

●

The shielded wire should be grounded at one side only.

1.5.2

Installation of wired remote controller

Black: 195mm, White: 205mm, Red: 125mm

6) Replace the top casing as before.

5?HAM

The length of each wire that should be left after a sheath is removed is as follows:

1.5.3 Installation of outdoor unit

(1) Installation

(a) In selecting an installation location, please pay attention to the following conditions and obtain the

customer’s consent.

1) The place where the foundation can bear the weight of Outdoor unit.

2) The place where there is no concern about leakage of combustible gas.

3) The place where it is not stuffy.

4) The place where free from thermal radiation of other thermal source.

5) The place where flow of drain is allowed.

6) The place where noise and hot air blast do not trouble neighboring houses.

7) The place where there is no obstruction of wind at the air inlet port and air outlet port.

8) A place where it is not subject to strict rules regulating electrical noises.

9) A place at least 5m away from a TV or radio set. (If electrical noises interfere with such an instrument, move it further away from it)

10) When the unit is installed at the particular location as shown below, corrosion or failure may be caused. Please consult the dealer from which you purchased the air-conditioner. a) The place where corrosive gas is generated (hot spring, etc.). b) The place where wind containing salt blows (seaside area). c) The place where enveloped by oil mist. d) The place where there is a machine that radiates electromagnetic wave. e) A place where inverter-equipped equipment, a captive generator, high-frequency medical equipment, wireless com-

munication equipment or other equipment generating electromagnetic waves is installed.

(b) The minimum space for installation

Select the space considering the direction of refrigerant piping.

Requ¡Restrict the height of obstruction wall in front of the air outlet port to the height of unit or less. Requ¡Do not enclose around the unit by the obstruction. Secure the top space for 1 m or more. Requ¡When more than one unit are installed side by side, provide a 250mm or wider interval between them as a service

space. In order to facilitate servicing of controllers, please provide a sufficient space between units so that their top plates can be removed easily.

Requ¡When installing the unit where there is a concern about the short circuit, attach the guide louver in front of air outlet

port to prevent the short circuit.

Requ¡When installing plural units in a group, secure sufficient intake space to prevent the short circuit. Requ¡When installing the unit where it is covered by snow, provide appropriate snow break means.

Special instructions for R410A air conditioning systems

● Use only R410A refrigerant. R410A refrigerant is operated at about 1.6 times as high pressure as the conventional refrigerant

is.

● Air conditioning systems using R410A are equipped with different-diameter outdoor unit service valve charge ports and

check joints provided in the units so as to prevent wrong refrigerant from being charged by mistake. To achieve higher strength resistible to refrigerant pressure, the dimensions of flaring and the across-the-flats measurement of a flare nut have been changed for refrigerant piping. Therefore, please arrange dedicated R410A tools as listed in the table shown on the below before you set to installation or service work.

● Do not use a charge cylinder. The use of a charge cylinder will cause the refrigerant composition to change, resulting in

performance degradation falling short of the rated capacity.

● In charging refrigerant, always take out refrigerant from a cylinder in the liquid phase.

Dedicated R410 tools

Gauge manifold Charge hose Electronic scale for refrigerant charging Torque wrench Flare tool Protrusion control copper pipe gauge Vacuum pump adapter Gas leak sensor

a b c d e f g h

(d) Carry-in and installation of unit

Pay sufficient attention to the carry-in and moving work of the unit, and always execute work by two persons or more.

1) Carry-in

a) When carrying-in the unit, carry it in as packed condition to the installation site as

near as possible.

b) If you are compelled to carry-in the unit unpacked condition, lift the unit by the rope

using a nylon sling or applying protection plates so that the unit is not marred.

a) To install the unit, secure the legs of unit by below mentioned bolts without fail.

Secure with the anchor bolt.

2) Install the unit directing the air out-

let port at a right angle to the wind

direction.

● Where the unit is likely to be subjected to strong winds, guard it from winds with the following measures.

A failure to give protection against winds may cause performance degradation, a rise of high pressure resulting is an

operation interruption, a broken fan, etc.

3) Where the foundation is not stable,

secure the unit with wire, etc.

Wind direction

1) Install the unit directing the air out-

let port to the wall.

500 or more

Wind direction

Protection plate

Wood base

Heavier on the right side

2) Moving

a) The unit is heavier on the right side looking from the front of unit

(air outlet port side). Therefore, sufficient caution is required for

the person who carries the right side of unit. The person who car-

ries the left side must hold the handle of front panle and the conner

pillar with both hands.

3) Bolt securing position

Conner pillar

Bury the foundation deeper

into the ground. Make the foundation wider.

Secure with bolts.

(M10 to 12)

Anchor bolt position (4 places)

Air inlet

Air outlet

Unit : mm

150 580 150

380

Unit:mm

Mark

123

L1 Open Open 500

L2 300 250 Open

L3 100 150 100

L4 250 250 250

Installation

type

Air inlet

Air outlet

Maintenance

space

( )

Air inlet

Ground level (floor level)

Ground level

(floor level)

b) Limit the protrusion height of front side anchor bolts to 15 mm at the maximum. c) Install the unit firmly so that it does not fall by earthquake and strong wind. d) Make the concrete foundation by referring the above illustration. e) Install the unit in level. (The height difference between right and left is within 5 mm.) f) In an area where temperature drops below zero for several days in a row, install the unit on the concrete base of which

top is elevated by 30mm or more from the ground level (measurement marked with * in the drawing). (Because of freezing, drain water could otherwise be blocked from running freely).

Piping specification

Maximum one way length

L=50 m or less

Height difference

● When the position of outdoor unit is higher than that of

the indoor unit, keep the difference H=30 m or less.

● When the position of outdoor unit is lower than that of the

indoor unit, keep the difference H=15 m or less.

Indoor unit

Outdoor unit

(2) Refrigerant piping work

Select the piping specification to fit the specification of indoor unit and installation location.

(a) Decision of piping specification

Unit : mm

Outdoor unit model Gas pipe Liquid pipe FDCVA302HENR ø 15.88  t1.0 ø 9.52  t0.8

(b) Points for attention in installing refrigerant piping

1) Use pipes made of the following material Material: Phosphorus deoxidized copper seamless pipes (C1220T, JIS H3300)

2) Please dress the refrigerant piping (both gas and liquid pipes) with a heat insulating material for prevention of dew condensation. Improper heat insulation incapable of preventing dew condensation can cause the leaking or dripping of water and a resultant soaking of household effects.

3) Use only a good heat insulating material (120°C or higher) for heat insulation. A poor heat insulating material offers only poor heat insulation and can cause cable deterioration. a) The gas pipes can cause dew condensation during a cooling opera-

tion, which may become drain water causing a water-leak accident, or a risk of burns during a heating operation, if touched accidentally, with its surface reaching a high temperature because of discharged gas flowing inside. So, do not fail to dress it with a heat insulating material to prevent such mishap.

b) Dress the flare joints of the indoor units with a heat insulating mate-

rial (pipe covers) (for both gas and liquid pipes).

c) Dress both gas and liquid pipes with a heat insulating material. In

doing so, leave no gaps between the pipe and the heat insulating material and wrap them, together with the connecting cable, with a dressing tape.

4) When you need to bend a pipe, bend it to the largest possible radius (R100R150) permitted. Do not bend a pipe repeatedly in an effort to shape it appropriately.

5) In laying pipes, take care to avoid debris, chips or water from entering the piping system.

6) A unit and a refrigerant pipe are to be flare connected. Flare a pipe after you have attached a flare nut to the pipe. The dimensions of flaring for R410A are different from those for the conventional R407C refrigerant. Although we recommend the use of flare tools developed specifically for R410A, conventional flare tools can also be used, if the measurement of protrusion B is adjusted with a protrusion control copper pipe gauge.

7) Tighten a flare joint securely with double spanners. Observe the following tightening torque values for flare nuts:

8) A branching pipe set (option part supplied separately) and refrigerant piping should be connected by blazing.

9) In blazing pipes, keep nitrogen gas flowing inside the pipes so that an oxide film may not form on the inner surfaces of the pipes.

Exterior tape

Gas piping

Liquid piping

Wires for connecting indoor and outdoor units

Insulation

13.2

19.7

ø9.52

ø15.88

0.4

Copper

pipe outer

diameter

Flared pipe end: A (mm)

0~0.5

ø9.52

ø15.88

Copper

pipe outer

diameter

Copper pipe protrusion for flaring: B (mm)

1.0~1.5

With an R410A tool

In the case of a rigid (clutch) type

With a conventional tool

Operation valve

size (mm)

ø9.52 (3/8")

ø15.88 (5/8")

Tightening

torque (N·m)

34~42

68~82

Tightening

angle (° )

30~45

15~20

Recommended length

of a tool handle (mm)

200

300

Do not hold the valve cap area with a spanner.

Please use a torque wrench. If a torque wrench is not available, fasten the flare nut manually first and then tighten it further, using the left table as a guide.

10) Tighten a flare joint securely with a double spanner. a) Do not apply force beyond proper fastening torque in tightening the flare nut. b) Fix both liquid and gas service valves at the valve main bodies as illustrated on the lower, and then

fasten them, applying appropriate fastening torque.

(d) Refrigerant pipe connection

● Install a pipe carefully so that it may not touch the unit’s internal components.

● A pipe touching with an internal component can generate abnormal noises or vibrations.

Airtighteness test completed

Vacuuming begins

Vacuuming completed

Vacuum gauge check

When the vacuum gauge's needle pointer creeps up, there is moisture left in the system or a leak. Pull air again after you have checked the system for a leak and rectified it. Use a reverse flow stop adapter to prevent the vacuum pump's lubricant oil from flowing into the refrigerant system.

Please run the vacuum pump for at least one hour after the vacuum gauge shows -101kPa or lower. (-755mmHg or lower)

No increase in the reading of the vacuum gauge's needle pointer.

(3) Air tightness test and air purge

● Always use a vacuum pump to purge air trapped within an indoor and the refrigerant piping.

(a) Air tightness test

1) When all the flare nuts on both indoor and outdoor unit sides are fastened. Conduct an air-tightness test from the service

valves charge port with the outdoor unit service valves (on both liquid and gas sides) closed tightly to check whether the

system has no leaks.

2) Use nitrogen gas in the air-tightness test. Do not use gas other than nitrogen gas under any circumstances.

Conduct the air-tightness test by applying 4.15MPa (42kg/cm

G) of pressure.

3) Do not apply the specified pressure at once, but increase pressure gradually.

a) Raise the pressure to 0.5 MPa, and then stop. Leave it for five minutes to see if the pressure drops.

b) Then raise the pressure to 1.5 MPa, and stop. Leave it for five more minutes to see if the pressure drops.

c) Then raise the pressure to the specified level (4.15 MPa), and record the ambient temperature and the pressure.

d) If the pressure does not drop after the units is left for approximately one day, the airtighteness is acceptable.

When the ambient temperature changes 1˚C, the pressure also changes approximately 0.01 MPa. The pressure. if

changed, should be compensated for.

(b) Air purge

When a vacuum air purge is completed, remove the valve rod cap nuts and open the service valves (both liquid and gas sides)

as illustrated below. After you have made sure that the valves are in the full-open position, tighten the cap nuts (for the valve

rads and charge ports).

Side cover

Fixing screw

⁄

Pipes can only be laid toward

the rear direction.

1) Since R410A refrigerant must be charged in the liquid phase, you should charge it, keeping the container cylinder upside

down or using a refrigerant cylinder equipped with a siphon tube.

2) Charge refrigerant always from the liquid side service port with the service valve shut. When you find it difficult to

charge a required amount, fully open the outdoor unit valves on both liquid and gas sides and charge refrigerant from the

gas (suction) side service port, while running the unit in the cooling mode. In doing so, care must be taken so that

refrigerant may be discharged from the cylinder in the liquid phase all the time. When the cylinder valve is throttled down

or a dedicated conversion tool to change liquid-phase refrigerant into mist is used to protect the compressor, however,

adjust charge conditions so that refrigerant will gasify upon entering the unit.

3) In charging refrigerant, always charge a calculated volume by using a scale to measure the charge volume.

4) When refrigerant is charged with the unit being run, complete a charge operation within 30 minutes. Running the unit

with an insufficient quantity of refrigerant for a long time can cause a compressor failure.

NOTE Put down the refrigerant volume calculated from the pipe length onto the caution label attached on the back

side of the side cover.

(5) Drain piping work

● Execute drain piping by using a drain elbow and drain grommets

supplied separately as optional parts, where water drained from the outdoor unit is a problem. In an area where temperature drops below zero for several days in a row, do not install a drain elbow or grommets. (Because of freezing, drain water could be blocked from running freely.)

 There are 3 drain holes provided on the bottom plate of an outdoor

unit to discharge condensed water.

 When condensed water needs to be led to a drain, etc., install the

unit on a flat base (supplied separately as an optional part) or concrete blocks.

 Connect a drain elbow as shown in the illastration and close the

other two drain holes with grommets.

Grommet

Drain elbow

Drain hose(To be arranged on the user's part)

• Open the valve rod until it touches the stopper. You need not apply lorce to push it further.

• When an operation is completed, replace the cap nut and tighten it as before.

Open

Hexagonal Head Wrench

(M4)

Liquid/gas operation

(4) Refrigerant quantity

(a) This unit is shipped from the factory with the refrigerant sufficient for an installation involving 30m of

piping, and does not necessitate additional refrigerant charge as long as the pipe length is 30m or less.

(b) When the pipe length exceeds 30m but remains within 50m, add refrigerant according to the table below

(showing an additional quantity required for each meter of the pipe exceeding 30m) by metering for the quantity determined by the actual pipe length.

(Example) When 302 model unit is used in a new installation involving 45m of piping

Additional charge quantity:0.9kg = (45-30)m  0.06kg/m

Item

302 series

Quantity charged for shipment (for 30m of piping)(kg) 2.95

Additional charge quantity per meter (kg/m) 0.06

Model

Compound pressure gauge Pressure gauge

Gauge manifold

Handle Hi

Gas service valve

Handle Lo

Liquid service valve

Charge port

101kPa

(

755mmHg)

Charge hose

Vacuum pump

Check valve Vacuum adapter

(6) Electrical wiring

Electrical installation work must be performed by an electrical installation service provider qualified by a power provider of the country. Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical installations in the country. 1 Do not use any supply cord lighter than one specified in parentheses for each type below.

¡ braided cord (code designation 60245 IEC 51), ¡ ordinary tough rubber sheathed cord (code designation 60245 IEC 53) ¡ flat twin tinsel cord (code designation 60227 IEC 41);

Do not use anything lighter than polychloroprene sheathed flexible cord (code designation 60245 IEC57) for supply cords of parts of appliances for outdoor use.

2 Ground the unit. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod or telephone grounding wire.

If improperly grounded, an electric shock or malfunction may result.

3 A grounding wire must be connected before connecting the power cable. Provide a grounding wire longer than the power cable. 4 The installation of an impulse withstanding type earth leakage breaker is necessary. A failure to install an earth leakage breaker

can result in an accident such as an electric shock or a fire.

5 Do not turn on the power until the electrical work is completed. 6 Do not use a condensive capacitor for power factor improvement under any circumstances. (It does not improve power factor,

while it can cause an abnormal overheat accident)

7 For power supply cables, use conduits. 8 Do not lay electronic control cables (remote control and signaling wires) and other cables together outside the unit. Laying

them together can result in the malfunctioning or a failure of the unit due to electric noises.

9 Fasten cables so that may not touch the piping etc. 0 When cables are connected, please make sure that all electrical components within the electrical component box are free of

loose connector coupling or terminal connection and then attach the cover securely. (Improper cover attachment can result in malfunctioning or a failure of the unit, if water penetrates into the box.)

(a) Connect a pair bearing a common terminal number with an indoor-outdoor connecting wire.

(b) In cabling, fasten cables securely with cable clamps so that no external force may work on terminal connections.

Model

302

series

3.5

ø1.6 mm

ø1.6 mm × 3

Power source

1phase  220-240V

50Hz

Power cable

thickness

(mm

)

Grounding wire

thickness

Max. over

current

(A)

Indoor-outdoor

wire thickness

number

Cable length

(m)

Earth leakage breaker

(Harmonic resistant type)

Remote controller

Indoor unit

Outdoor unit

Switchgear or circuit breaker

Power cable, indoor-outdoor connecting wires

● Always perform grounding system installation work

with the power cord unplugged.

CAUTION

Always use an earth leakage circuit breaker designed for

inverter circuits to prevent a faulty operation.

Notes (1) The specifications shown in the above table are for units without heaters. For units with heaters, Please refer to the installation instructions or the

construction instructions of the indoor unit. (2) Switchgear or circuit breaker capacity which is calculated from MAX. over current should be chosen along the regulations in each country. (3) The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than three cables contained in conduit and

a voltage drop is 2%. For an installation falling outside of these conditions, please follow the internal cabling regulations. Adapt it to the regulation

in effect in each country.

Grounding terminal

⁄

It is stuck on control box cover.

⁄

Fasen cables so that terminal connections are

not subjected to external force.

Wiring diagram

Wiring clamp

Power source,signal line and ground terminal block

ZYX

Indoor unit

Remote controller

SW1

Remote controller

SW1

ZYX

Remote control signal line (with polarity) (Match up X , Y and Z when making connections.)

Upper

Lower

PCB

SW2 SW1

SW1

Switch

Function

Mastor remote controller

Slave remote controller

SW1

Indoor unit (1) Address [0]

Red

White

Black

Remote controller

ZYX

Indoor unit (2) Address [1]

ZYX

Indoor unit (16) Address [F]

ZYX

Remote control signal line (with polarity) (Match up X , Y and Z when making connections.)

(d) Remote controller wiring and connection procedure

1) Master-slave settings when using multiple remote controllers

● Up to 2 remote controllers can be connected for each indoor unit (or group).

a) There are two methods, one where the remote controller signal line (3-wire) for the slave remote controller is taken

from the indoor unit and the other where the signal lines are taken from the master remote controller.

b) Set the SW1 select switch on the slave remote controller on the Slave setting. (It is set on the Master setting at the

factory.)

Note (1) Remote controller sensor activation settings are possible only with the master remote controller. Install the master remote controller in a

location where it can sense the room temperature.

2) Controlling multiple indoor units using a single remote controller.

● Up to 16 indoor units can be controlled with a single remote controller.

a) Run 3-wire remote control lines between each of the indoor units. See “Precation in extending the remote control

cord” on page 68 concerning extended remote control lines.

b) Set the remote controller communications address on “0” ~ “F” using rotary switch SW2 on the indoor unit’s

control board, taking care not to overlap the addresses of any of the units.

c) After turning the power on, press the AIR CON No. button to display the indoor unit’s address. Be sure to confirm

that the settings are displayed correctly in the remote controller by using the

and

buttons to display the

address of each connected indoor unit.

(7) Setting functions using the wired remote controller

(a) The default settings of this unit's functions are as follows: If you want to charge a setting, follow the

procedure found in the installation manual and set to your desired setting.

For the method of setting, please refer to the installation manual of a remote controller unit.

1 Remote controller unit functions (

FUNCTION

)

2 Indoor unit functions (I/U FUNCTION

)

Default

setting

GRILLE SET

AUTO RUN SET

TEMP S/W

MODE S/W

ON/OFF S/W

FANSPEED S/W

LOUVER S/W

TIMER S/W

SENSOR S/W

VENTI SET

TEMP RANGE SET

I/U FAN SPEED

MODEL TYPE

EXTERNAL CONTROL SET

ERROR DISP SET

POSITION

°C/°F SET

INVALID

50Hz AREA ONLY

60Hz AREA ONLY

AUTO RUN ON

AUTO RUN OFF

VALID

INVALID

VALID

INVALID

VALID

INVALID

VALID

INVALID

VALID

INVALID

VALID

INVALID

SENSOR OFF (Invalid)

SENSOR ON (Valid)

INVALID

VALID

NO VENTI

VENTI LINK SET

NO VENTI LINK

DISP CHANGE

NO DISP CHANGE

3 FAN SPEED

2 FAN SPEED

1 FAN SPEED

HEAT PUMP

COOLING ONLY

INDIVIDUAL OPERATION

SAME OPERATION FOR ALL UNITS

ERROR DISP

NO ERROR DISP

FIX (1 OF 4) (4 position stop)

IN MOTION (Free stop)

°C

°F

Grille lift panel setting

Remote control sensor setting

Indoor unit fan speed setting

Louver control setting

Function number A

Default setting

Hi CEILING SET

FILTER SIGN SET

POSITION

EXTERNAL INPUT SET

ROOM TEMP OFFSET

FAN CONTROL

FREEZE PREVENT TEMP

FREEZE PREVENT CONTROL

(Heating room temperature offset)

Heating fan control

Louver control setting

STANDARD (Mild mode)

Hi CEILING 1

(Powerful mode)

NO DISPLAY

AFTER 180H

AFTER 600H

AFTER 1000H

1000H→STOP

FIX (1 OF 4) (4 positiion stop)

IN MOTION (Free stop)

LEVEL INPUT

PULSE INPUT

NORMAL OPERATION

VALID

NORMAL OPERATION

TEMP SHIFT +3˚C

LOW FAN

STOP→LOW FAN (Intermittent operation)

TEMP Hi

TEMP Lo

FAN CONTROL ON

FAN CONTROL OFF

Function description B Setting C

Function number A

Function description B Setting C

()

POWER FAILURE COMPENSATION SET

()

OPERATION PERMISSION PROHIBITED

Notes(1)

(2)

Setting marked with [] are the default setting. Setting marked with [

] are those that are set automatically according to an indoor unit or an outdoor unit connected. Please check default settings with the indoor unit's installation manual.

Notes(1)

(2)

(3)

Setting marked with [] are the default setting. Setting marked with [

] are those that are set automatically according to an indoor unit or an outdoor unit connected. Please check default settings with the indoor unit's installation manual. When Item 17 : “ POSITION” is changed, please also change Item 04 “ POSITION” setting found in “Indoor unit functions”.

(b) Function setting method

1) Stop the air conditioner

2) Press the SET and MODE buttons simultaneously

for 3 seconds or longer.

The screen display will be switched as follows:

“

SELECT ITEM”

“

SET"

“FUNCTION SET

”

3) Press the SET button.

The unit will enter the function setting mode. The

screen display will charge to “

FUNCTION

”.

4) Check which category your desired setting belongs to, “

FUNCTION (Remote controller unit function)” or “I/U

FUNCTION " (Indoor unit function).

5) Press either

or button.

Select either “ FUNCTION

” or “I/U FUNCTION

”.

6) Press the SET button.

7) When “ FUNCTION ” is selected.

1 “DATA LOADING” (blinking)

“

FUNCTION”

“01 GRILLE SET” (Function number: A, Function description: B)

The screen display will be switched like this.

2 Press either

or button.

“Function number: A, Function description: B “from the list of remote controller unit functions will be displayed one

by one. Select a desired function.

3 Press the SET button.

The screen display will be switched as follows:

“

SETTING”

“Setting: C” (ex. “AUTO RUN ON”)

4 Press either

or button.

A list of “Settings: C” will be displayed one by one. Select your desired setting.

5 Press the SET button.

The selected setting is displayed

for 2 seconds, then followed by

“SET COMPLETE” and the

function setting process is com-

pleted.

Then the screen display will be

swiched to “Function number: A, Function description: B,” s o

if you want to continue to set an-

other function, repeat the steps as

explained above.

To finish the function setting pro-

cess, please proceed to Step 8).

Operating guide message Function description: B , Settting: C

Function number: A

Previous screen buttonIndoor unit selector button

Confirm Button

Finish Button

Selector button

Start Button

AUTO RUN SET

FUNCTION SET

FUNCTION

I/U FUNCTION

AUTO RUN SET

AUTO RUN ON

AUTO RUN ON AUTO RUN OFF

SET COMPLETE

Function number: A

Function description: B

* When “ AUTO RUN SET ” is selected.

Setting: C

When “I/U FUNCTION ” is selected.

1 The screen display will be switched as follows:

“

I/U SELECT” “

SET”

“I/U No.00” (blinking)

2 Press either

or button.

Select the indoor unit number that you want to change settings. If only one indoor unit is connected, the indoor unit number will not charge, so please proceed to Step 3. If “ALL I/U

” is selected while indoor group control is in effect, you can set all units to the same settings.

3 Press the SET button.

Indoor unit number indication will change from blinking to lit continuously, The screen display will be switched as follows: "DATA LOADING" (blinking for about 2 to 23 seconds)

“ FUNCTION” “01 Hi CEILING SET”

(Function number: A, Function description: B)

4 Press either

or button.

“Function number: A, Function description: B” from the list of indoor unit functions will be displayed one by one. Select a desired function.

5 Press the SET button.

The screen display will be switched as follows: “

SETTING” “Setting: C” (ex. “STANDARD”)

6 Press either

or button.

A list “Setting: C” will be displayed one by one. Select your desired setting.

7 Press the SET button.

The selected setting is displayed for 2 seconds, then followed by “SET COMPLETE” and the function setting process is completed. Then the screen display will be switched to “Function number: A, Function description: B” so if you want to continue to set another function, repeat the stepa as explained above. To finish the function setting process, please proceed to Step 8).

8 Press AIR CON No. button.

The screen display will go back to the indoor unit selection screen (e,g. “ I/U No.00”). If you want to continue to set another indoor unit, please follow the steps explained above.

8) Press the ON/OFF button. This ends a function setting process. Even if a function setting process is not completed, this ends the process. Please note that any setting that is not completed will become void.

● Pressing the RESET button during a function setting process will allow you to go back the previ-

ous step. Please note that any setting that is not completed will become void.

● Method of checking the current setting

While following the above mentioned step, the setting that appears when the SET button is pressed for each “Func-

tion number: A, Function description: B” is the current setting “Stting: C”. (When "ALL I/U

" is selected, the

setting of the indoor unit with the lowest number is displayed)

● Settings are stored in the controller and not lost even a power outage occurs.

I/U No.00

Hi CEILING SET

Function number: A

Function description: B

* When “ Hi CEILING SET” is selected.

STANDARD

Settings: C

1) It is possible to change the set temperature range using the remote control. a) The upper and lower set temperature limits can be set from the remote control.

Upper limit value setting: Effective during heating. The temperature can be set within a range of 20~30ºC. Lower limit value setting: Effective when running in modes other than the heating mode (AUTO, COOL, FAN, DRY): The temperature can be set within a range of 18~26ºC.

b) If the upper and lower limits are set using this function, the following controls are active.

2) When and BTEMP RANGE SET under “

FUNCTION” the function setting mode is DISP CHANGE

a) If you are setting the upper limit,

q If a temperature that is greater than the upper limit during heating is set from the remote control.

The unit runs for 30 minutes at the set temperature, then it automatically transmits the upper limit temperature. The display on the remote control also approaches that temperature.

w During heating, if the upper limit value is set at a temperature below the upper limit value:

The set temperature is transmitted.

b) If the lower limit is set

q If a temperature that is lower than the lower limit value is set from the remote control. When running in an operation

mode other than the heating mode: the unit runs at the set temperature for 30 minutes, then it automatically transmits the lower limit temperature.

w If a temperature that is higher than the lower limit value is set when running in a mode other than the heating mode:

It transmits the set temperature.

3) When and BTEMP RANGE SET under the “

FUNCTION” the function setting mode is NO DISP CHANGE.

a) If the upper limit is set

q During heating, if a temperature that is higher than the upper limit is set from the remote control:

The upper limit value is transmitted. However, the remote control display does not approach the upper limit value, but remains on the set temperature.

w During heating, if the temperature is set at a value lower than the upper limit value:

The set temperature is transmitted.

b) If the lower limit is set

q When in an operating mode other than the heating mode, if a temperature that is lower than the lower limit value is

set from the remote control: The lower limit value is transmitted. However, the remote control display does not approach the lower limit value, but remains on the set temperature.

w When in an operating mode other than the heating mode, if a temperature that is higher than the lower limit value is set:

The set temperature is transmitted.

4) Setting the upper and lower limit values a) Stop the air conditioner, then press the SET and MODE buttons simultaneously for 3 seconds or longer. If you press “

SELECT ITEM” “

SET”

“FUNCTION SET

” the display changes.

b) Press the

button, then change the “TEMP RANGE

“ display. c) Press the SET button and enter the temperature range setting mode. d) Using the

buttons, select the “Hi LIMIT SET

” or “Lo LIMIT SET

,” then fix it by pressing SET.

e) If you selected “Hi LIMIT SET,” (enabled during heating)

q “

SET UP” “Hi LIMIT 28°C ” (blinking) is displayed.

w Using the “

” temperature setting buttons, select the upper limit value. Display Example: “Hi LIMIT 26ºC

“ (blinking)

e Press the SET button to fix the setting. Display example: “Hi LIMIT 26ºC” (lights up for 2 seconds)

After the fixed upper limit value lights up for 2 seconds, the display returns to the “Hi LIMIT SET

” display in

item d).

f) If “Lo LIMIT SET

” was selected (enabled during COOL, DRY and FAN)

q “

SET UP” “Lo LIMIT 20°C

” (blinking) is displayed.

w Using the

temperature setting buttons, select the lower limit. Display example: “Lo LIMIT 24ºC

” (blinking)

e Press the SET button to fix the setting. Display example: “Lo LIMIT 24ºC” (lights up for 2 seconds)

After the fixed lower limit value lights up for 2 seconds, the display returns to the “Lo LIMIT SET

” display in

item d).

g) Pressing the ON/OFF button stops the operation.

(Operation stops even if the ON/OFF button is pressed during setting, and the stopped state returns. However, if setting is not completed, it is not valid, so use caution.)

S If the RESET button is pressed during setting, the previous setting screen is displayed.

Function No. A

(Example) If the upper limit is set at 28°C

Function Contents B Setting Contents C

TEMP RANGE SET

DISP CHANGE

NO DISP CHANGE

Control Contents

The remote controller’s display and sent data upper limit changes to 28°C.

The remote controller’s display upper limit remains at 30°C and only the upper limit of the sent data is changed to 28°C.

• If the RESET button is pressed during a setting operation, the display returns to the previously displayed setting screen.

However, settings which have not been fixed become invalid, so exercise caution.

* If “NO DISP CHANGE” is selected in No. 12, “TEMP RANGE SET” of the remote controller’s functions, of the

function setting modes, the remote controller’s display does not change even if the temperature range has been changed.

(8) Checking operation data

Operation data can be checked with remote controller unit operation. 1 Press the CHECK button.

The display change from “

SELECT ITEM”

“

SET"

“OPERATION DATA

”.

2 Press the SET button while “OPERATION DATA

” is displayed.

3 The display will change to “I/U No. 00

” (blinking indication).

Select the indoor unit number you want to have data displayed with the

button.

(When only one indoor unit connected, the indoor unit number displayed on the screen will not change.)

4 Determine the indoor unit number will the SET button.

(The indoor unit number changes from blinking indication to continuous indication.)

“DATA LOADING” (A blinking indication appears while data is loaded)

“OPERATION DATA

” appears and data number 01 is displayed.

5 Upon operation of the

button, the current operation data is displayed in order from Data number 01.

The items displayed are as follows:

* Depending on models, the items that do not have corresponding data are not displayed.

6 To display the data of a different indoor unit, press the AIR CON No. button, which allows you to go back to the indoor unit

selection screen.

7 Pressing the ON/OFF button will stop displaying data.

Pressing the RESET button during remote controller unit operation will undo your last operation and allow you to go back to

the previous screen.

→

Number

01 02 03 04 05 07 11 21 22 23 24 27 28 29 31 32 34 35 36 37

(Operation mode)

(Indoor unit heat exchanger temperature 1) (Indoor unit heat exchanger temperature 2) (Indoor unit fan speed) (Indoor unit operation hours) (Outside air temperature) (Outdoor unit heat exchanger temperature 1) (Outdoor unit heat exchanger temperature 2)

(Discharge pipe temperature)

(Outdoor unit fan speed)

(Compressor operation hours) (Expansion valve opening 1)

SET TEMP RETURN AIR I/U HEAT EXCH 1 I/U HEAT EXCH 2 I/U FAN TOTAL I/U RAN OUTDOOR O/U HEAT EXCH 1 O/U HEAT EXCH 2 COMP HERTZ DISCHARGE DOME BOTTOM CT O/U FAN SILENT MODE ON/OFF 63H1 ON/OFF DEFROST ON/OFF TOTAL COMP RUN EEV 1

Data item

SW5-3

OFF

Function

Cooling during a test run

Heating during a test run

Normal or After the test operation

SW5-4

OFF

(9) Test run

(a) Test run from an outdoor unit.

1) Test run method

a) A test run can be initiated from an outdoor unit by using SW5-3 and SW5-4 for on-site setting.

b) Switching SW5-3 to ON will start the compressor.

c) The unit will start a cooling operation, when SW5-4 is OFF, or a heating operation, when SW5-4 is ON.

d) Do not fail to switch SW5-3 to OFF when a test run is completed.

1) Cooling test operation procedure

Carry out the following test operation procedure using the remote controller.

a) Starting the cooling test operation

1 Press the ON/OFF button to start operation. 2 Press the MODE button and select “ (COOL)”. 3 Press the TEST button continuously for 3 seconds or longer.

The display changes from “

SELECT ITEM”

“

SET"

“

TEST RUN

”.

4 When “

TEST RUN

” is displayed, press the SET button to begin the cooling test operation.

The display shows “

TEST RUN.”

b) Canceling the cooling test operation

Pressing the ON/OFF button or the TEMP

button ends the cooling test operation.

The “

TEST RUN” display is cleared.

(b) Test run from remote controller.

Indoor unit

Outdoor unit

Gas line

Liquid line

Charge port

Charge hose

Gauge manifold

Charge valve Vacuum adapter

Vacuum pump

Handle Lo

Handle Hi

Refrigerant cylinder

1.6 MAINTENANCE DATA

1.6.1 Servicing

(1) Evacuation

The evacuation is a procedure to purge impurities, such as noncondensable gas, air, moisture from the refrigerant equipment by

using a vacuum pump. Since the refrigerant R410A is very insoluble in water, even a small amount of moisture left in the refriger-

ant equipment will freeze, causing what is called ice clogging.

Evacuation procedure

Make sure that the both service valves of gas and liquid line are fully opened.

(a) Check to ensure that there is no internal pres-

sure in the unit. If there is an internal pres-

sure, it should be relived through the service

port.

(b) Connect the charging hose of the gauge mani-

fold to the service port of the gas piping.

Close high pressure valve 2 of gange mani-

fold.

pump.

Repeat evacuation in the following sequence.

Notes (1) Do not use the refrigerant pressure to expel air.

Notes (2) Do not use the compressor for evacuation.

Notes (3) Do not operate the compressor in a vacuum condition.

Vacuuming begins

Vacuuming completed

Vacuum gauge check

Please run the vacuum pump for at least one hour after the vacuum gauge shows -101kPa or lower. (-755mmHg or lower)

No increase in the reading of the vacuum gauge's needle pointer.

(2) Refrigerant charging

(a) After the evacuation shown in the above, change the connection of the charge hose A to the refrigerant cylinder.

(b) Purge air from the charge hose A.

First loosen the connecting portion of the charge hose at the gauge manifold side and open valve 3 for a few seconds, and

then immediately retighten it after observing that gas has blown out from loosened connecting portion.

When refrigerant has been charged into the unit to some extent, refrigerant flow becomes stagnant. When that happens, start

the compressor in cooling cycle until the system is filled with the specified amount of gas, then close valves 1 and 3 and

remove the gauge manifold. Cover the service port with caps and tighten them securely.

(d) Check for gas leakage by applying a gas leak detector around the piping connection.

(e) Start the air conditioner and make sure of its operating condition.

1.6.2 Trouble shooting for refrigerant circuit

(1) Judgement of operating condition by operation pressure and temperature difference

Making an accurate judgement requires a skill that is acquired only after years of experience, one trouble may lead to an another

trouble from a single trouble source and several other troubles may exist at the same time which comes from a undetected different

trouble source.

Filtering out the trouble sources can be done easier by comparing with daily operating conditions. Some good guides are to judge

the operating pressure and the temperature difference between suction air and delivery air.

Following are some pointers,

Pressure

Trouble cause

High side

●

Low side

●

High side ● Ineffective compression Low side ● (defective compressor) High side ● Low side ●

High side

●

Low side

●

High side

●

Low side ●

1) Too high temperature of room

1) Insufficient refrigerant in circuit

2) Clogging of strainer

3) Gas leakage

4) Clogging of air filter (in cooling)

5) Decrease in heat load (in cooling)

6) Locking of indoor fan (in cooling)

1) Locking of outdoor unit fan (in cooling)

2) Dirty outdoor heat exchanger (in cooling)

3) Mixture of non condensable gas (air etc.)

1) Excessive overcharging of refrigerant

2) Mixture of non condensable gas (air etc.)

Indication

Circuit

Too low

A little low

Normal

A little

high

Too high

(1) Selfdiagnosis function

(a) Check Indicator Table

Whether a failure exists or not on the indoor unit and outdoor unit can be know by the contents of remote controller eroor code, indoor/outdoor unit green LED (power pilot lamp and microcomputer normality pilot lamp) or red LED (check pilot lamp).

1) Indoor unit side

Outdoor unit LEDIndoor unit LED

Green

Keeps flashing

Red

Stays OFF

Stay OFF or Lights

continuously

Green

Keeps flashing

Stays OFF

Keeps flashing

*3 time flash

Stays OFF

2 time flash

1 time flash

Stays OFF

Stay OFF

Red

Stays OFF

Normal

Indoor unit PCB fault

Outdoor unit microcomputer failure

Indoor unit heat exchanger thermistor failure Indoor unit return air thermistor failure

The float SW operates (with FS only). Drain up kit wiring fault.

Indoor / outdoor transmission error.

Stays OFF

2 time flash

Stays OFF

Remote

controller

error code

No-indication

LCD flashes continuously or is off.

E10

E28

Cause

Keeps flashing Keeps flashing1 time flash Stays OFF

Stays OFF Stays OFF Stays OFF

Power OFF, L phase wiring is open, power source failure

Stays OFF

Remote controller wires X and Y are reversely connected. *For wire breaking at power ON, the LED is OFF. Remote controller wire is open. (X wire breaking : A beep is produced and no indication is made. Z wire breaking : No beep and no indication) The remote controller wires Y and Z are reversely connected.

Keeps flashing Keeps flashingStays OFF 2 time flash

Poor connection or disconnection in wires connecting the indoor and outdoor units.

When multiple remote controllers are used for control, the power supply to some indoor units is OFF.

When multi-unit control by remote controller is performed, the number of units is over (more than 17 units). Two remote controller are provided for one controller is performed.

Outdoor unit control PCB is faulty when the power is turned on, or the inverter parts are faulty.

Heating overload (indoor heat exchanger temperature is abnormally high) and indoor heat exchanger thermistor is faulty.

Remote controller thermistor failure

Keeps flashing

Stays OFF

E16

Fan motor is faulty (FDTC or FDKN type).

Communications are faulty between master and slave indoor units

Keeps flashing

3 time flash

Stays OFF

E14

1.6.3 Diagnosing of microcomputer circuit

Outdoor unit LEDIndoor unit LED

Green

Keeps flashing

Red Green

Stays OFF

1 time flash

Red

Outdoor unit power supply open phase, Noise filter defect

Discharge temperature abnormality.

Discharge pipe thermistor failure

63H1 operation, Operation with service valve open

Outdoor air temperature thermistor failure

DC fan motor abnormal.

Remote

controller

error code

E34

E36

E37

E38

E39

E40

E48

Cause

Keeps flashing Keeps flashing

Stays OFF 1 time flash

E35

Keeps flashing

Stays OFF 1 time flash

Current (Abnormalities in a compressor over current)

E42

Keeps flashing

Stays OFF 1 time flash Inverter communications error

E45

Keeps flashing

Stays OFF 1 time flash

Low voltage abnormal or low voltage sensor disconnected

E49

Keeps flashing

Stays OFF 1 time flash

Inverter PCB abnormal

E51

Keeps flashing

Stays OFF 1 time flash

Suction pipe temperature thermistor disconnected

E53

Keeps flashing

Stays OFF

1 time flash

5 time flash

Low pressure sensor disconnected or abnormal

Compressor start up error

E54

E59

Outdoor unit heat exchanger thermistor failure

Outdoor heat exchanger temperature is high or outdoor heat exchanger thermistor is faulty.

Keeps flashing

Stays OFF 1 time flash A/F module over-current error

E47

2) Outdoor unit side

Section Display section

Error code of remote controller

Inspection LED (red) of indoor unit PCB

Inspection LED (red) of outdoor unit PCB

• Displays the error of higher priority (When plural errors are persisting)

• Displays the present errors. (When a new error has occurred after the former error was reset.)

Error detail Error code Timing of error detection

Wrong connection between the indoor and outdoor units.

“ WAIT ”

Normally, 30 seconds after the power is turned ON.

Normally after the power is turned ON (during communications).

Broken wire of heat exchanger thermistor

Drain error (float switch motion)

No communications even once with the outdoor unit.

After 1 or more communications of the indoor unit with the remote controller following power on, transmission errors cause an interruption for 2 minutes.

After communications with the outdoor unit 1 or more times, communications are abnormal continuously for 2 minutes.

When an input temperature of –50°C or lower is measured by the return air thermistor is measured for 5 seconds or longer within 60 minutes after the first detection.

When an input temperature of –50°C or lower is measured by the heat exchanger thermistor is measured for 5 seconds or longer within 60 minutes after the first detection.

Transmission error of remote controller indoor unit

Transmission error between indoor/outdoor units

The number of connected indoor units exceeds the connection limit (when multiple units are control by a single remote controller).

Broken wire of indoor unit return air thermistor

···········

Error detail Error code Timing of error detection

Broken wire of heat exchanger thermister

Broken wire of discharge pipe thermistor

Broken wire of suction pipe thermistor

Broken wire of low pressure sensor

Broken wire of outdoor air temperature thermistor

When a thermistor input temperature of –30°C or lower is measured for 5 seconds or longer 3 times within 40 minutes after the 1st detection between 2 minutes and 2 minutes 20 seconds after compressor operation starts.

When a thermistor input temperature of –50°C or lower is measured for 5 seconds or longer 3 times within 40 minutes after the 1st detection between 2 minutes and 2 minutes 20 seconds after compressor operation starts.

When a thermistor input temperature of –10°C or lower is measured for 5 seconds or longer 3 times within 40 minutes after the 1st detection between 10 minutes and 10 minutes 20 seconds after compressor operation starts.

When a thermistor input temperature of –50°C or lower is measured for 5 seconds or longer 3 times within 40 minutes after the 1st detection between 10 minutes and 10 minutes 20 seconds after compressor operation starts.

When a sensor is OV or lower or 3.49V or higher continously for 5 seconds or longer 3 times within 40 minutes after the 1st detection between 2 minutes and 2 minutes 20 seconds after compressor operation starts.

(b) Display sequence of error, inspection display lamp

1) One kind error Display corresponding to the error is shown.

2) More than one errors.

3) Timing of error detection

● Indoor unit side.

● Outdoor unit side.

4) Recording and reset of error

Notes (1) Priority is in the order of E1 > ... > E10 > ... > E59.

(2) Procedures of trouble diagnosis

When any error occurs, inspect in following sequence. Detailed explanation on each step is given later in this text.

Error display Memory Reset

Error code of remote controller

Indoor unit inspection lamp (red)

• Saves in memory the mode

(1)

of higher

priority

• Stop the unit operation by pressing the ON/OFF switch of remote controller.

• Operation can be started again if the error has been reset.

• Saves in memory the mode

(1)

of higher

priority

• Cannot save in memory

Outdoor unit inspection lamp (red)

Error

Check of inspection display [In-

door/outdoor unit PCB, remote

controller or Indication board]

Power supply check

(indoor/outdoor unit)

Replacement or repair of defective parts Test run/adjustment

Check of unit

controller

Check remote controller for

abnormal operation data.

Indoor unit

Outdoor unit

: Press the ON/OFF button on the remote controller. Or disconnect and reconnect the power supply connector

(CNW1 or CNW0) on the indoor unit control PCB or turn the main power supply OFF.

: Turn the main power supply OFF.

(3) Error diagnosis procedures at the indoor unit side

To diagnose the error, measure the voltage (AC, DC), resistance, etc. at each connector around the PCB of indoor unit based on the

inspection display or the operation state of unit (no operation of compressor or blower, no switching of 4-way valve, etc.) If any

defective parts are discoverd, replace with the assembly of parts as shown below.

(a) Single-unit replacement parts for PCB of indoor unit. (Peripheral electric parts for circuit board.)

Indoor unit printed circuit board, thermistor (air return, heat exchanger), operating switches, limit switches, transformers,

fuses.

Note (1) Use normal inspection methods to determine the condition of strong electrical circuits and frozen cycle parts.

(b) Replacement procedure of indoor unit microcomputer printed circuit board

Microcomputer printed circuit board can be replaced with following procedure. (i) Confirm the parts numbers.

PJA505A142ZA

PJA505A122ZD

PJA505A128ZC

Parts number

FDTC

FDT

FDEN

Model

FDUM

FDKN

–

Model

PJA505A131ZC

PHA505A018ZF

–

Parts number

Parts layout on the indoor unit PCB

Model: FDTC series

Input signal - Reverse invalid Input signal - Run stop Heating thermostat OFF-Lo Heating thermostat OFF-Stop, Lo Normal operation operable Operation permission prohibited Normal Heating temp. +3 Louver free stop control - Invalid Louver free stop control - Effective Freeze prevention fan control activated. Freeze prevention fan control deactivated. Louver position : Normal Louver position : For wind 1

J1 (SW7-1)

J2 (SW7-2)

J3 (SW7-3)

J4 (SW7-4)

J5 (SW8-1)

J6 (SW8-2)

J7 (SW8-3)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

Name Function

Note (1)

(2)

“None” means that jumper wire is not provided on the PCB or the connection is cut The replacement board is not equipped with jumpers J1 ~ J7. Instead, SW7 and 8, with the same functions as jumpers J1~J7, are used in the position where the jumpers were previously. Set SW7 and 8 locally in accordance with the above table.

Note (1) It is normally ON only in the case of SW9-4.

Setting time : 1000hrs. (Unit stop) Setting time : 1000hrs. (Display) Setting time : 600hrs. (Display) Setting time : 180hrs. (when shipped from factory)

SW5-4SW5-3

OFF

Switch

Function

Emergency operation Normal Fan control : Powerful mode Fan control : Mild mode

SW9-3

SW9-4

SW10-1 (J9)

Switch Function

Auto swing function - None Auto swing function - With Remote controller air flow – Remote controller air flow 1 speed Remote controller air flow 2 speed Remote controller air flow 3 speed

SW10-3

(J11)

SW10-2

(J10)

OFF

Switch

Function

Slave c Slave b Slave a Master

SW5-2SW5-1

OFF

● Control change switch (SW5, SW9, SW10)

Function of DIP switch SW5 (Usually all turned OFF)

Function of DIP switch SW9

● Change by the jumper wire

Function of DIP switch SW10 (Usually all turned ON)

CNI

CNQ

LED2 LED1

CNT CNV

CNJ

CNR

CNW0 CNW1

CNM1CNM1

CNM2

CNW2

CNH CNN1

CNZ CNB

SW5

SW2

SW9

SW10SW7

SW8

PCB power supply connector

(Primary side)

Power supply

Fan motor

Drain motor

Louver motor

Connector

Heat exchanger thermistor,Return air thermistor

(ThI-R1,ThI-A)

Heat exchanger thermistor

Float switch

DPI switch

Remote controller

(ThI-R2)

(SW9)

J5,J6

(SW8)

J1~J4

(SW7)

DPI switch

(SW5)

DPI switch

(SW10)

(CNT)

PCB power supply connector

(Secondary side)

CNM3

52X6 52X1 52X2 52X3

52X4

52X8-2

PC3

IC2

CNE

Z2D

Z3D

Z4D

Z5D

R16

ZD1

CNJ

IC7

TVS1

CNM2

CNW8

CNT

IC9

1234

J10

J11

J12

CNR

IC12

CNG

LED2

LED1

CNW9

C13

PC5

C12

C58

IC3

CNY

CNI

CNH CNN1

SW2

SW10

SW5

1234

SW7

J5J6J7

SW8

J1J2J3

SW9

IC11

IC8

CNB

C11

C41

KN1

CNV

52X7

52X8-1

CNW7

TM1

PC2 PC1

R17

C23

Power supply PCB (CNW8)

Connector (CNT)

Address switch (SW2)

Heat exchanger thermistor, Return air thermistor

(Thi-R1, Thi-A)

Heat exchanger thermistor

(Thi-R2)

J9~J11 (SW10)

DIP switch (SW5)

J5~J7 (SW8)

DIP switch (SW9)

J1~J4 (SW7)

Remote controller

Louver motor

To power supply (CNW7)

Fan motor

J1 (SW7-1)

J2 (SW7-2)

J3 (SW7-3)

J4 (SW7-4)

J5 (SW8-1)

J6 (SW8-2)

J7 (SW8-3)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

Name Function

Note (1)

(2)

“None” means that jumper wire is not provided on the PCB or the connection is cut The replacement PCB is not equipped with jumpers J1 ~ J7. Instead, SW7 and 8, with the same functions as jumpers J1~J7, are used in the position where the jumpers were previously. Set SW7 and 8 locally in accordance with the above table.

Note (1) It is normally ON only in the case of SW9-4.

Slave c Slave b Slave a Master

SW5-2SW5-1

OFF

Setting time : 1000hrs. (Unit stop) Setting time : 1000hrs. (Display) Setting time : 600hrs. (Display) Setting time : 180hrs. (when shipped from factory)

SW5-4SW5-3

OFF

Switch

Function

Emergency operation Normal Fan control : Powerful mode Fan control : Mild mode

SW9-3

SW9-4

SW10-1 (J9)

Switch Function

Auto swing function - None Auto swing function - With Remote controller air flow – Remote controller air flow 1 speed Remote controller air flow 2 speed Remote controller air flow 3 speed

SW10-3

(J11)

SW10-2

(J10)

OFF

Switch

Function

● Control change switch (SW5, SW9, SW10)

Function of DIP switch SW5 (Usually all turned OFF)

Function of DIP switch SW9 (Usually all turned OFF)

● Change by the jumper wire

Function of DIP switch SW10 (Usually all turned OFF)

Model: FDT series

CNW1

CNJ2CNM3CNRCNV

LED1

LED2

CNB CNW2

KN1

52X5

52X352X252X252X652X4

52X8-2

52X8-1

52X7

ZNR

CNW0

CNM1

C57

CNQ CNT

CNH CNN1

SW2 SW5

CNE

SW8

SW7SW9SW10

IC8IC7

PCB power supply connector (Primary side)

PCB power supply connector

Heat exchanger thermistor, Return air thermistor

(Thl-R1, Thl-A)

DIP switch (SW5)

J5~J7 (SW8)

J1~J4 (SW7)

DIP switch (SW9)

J9~J11 (SW10)

Address switch (SW2)

Connector (CNT)

Heat exchanger thermistor (Thl-R2)

Remote controller

(Secondary side)

Power supply

Fan motor

Model: FDEN series

J1 (SW7-1)

J2 (SW7-2)

J3 (SW7-3)

J4 (SW7-4)

J5 (SW8-1)

J6 (SW8-2)

J7 (SW8-3)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

Name Function

Note (1)

(2)

Slave c Slave b Slave a Master

SW5-2SW5-1

OFF

Setting time : 1000hrs. (Unit stop) Setting time : 1000hrs. (Display) Setting time : 600hrs. (Display) Setting time : 180hrs. (when shipped from factory)

SW5-4SW5-3

OFF

Switch

Function

Emergency operation Normal Fan control : Powerful mode Fan control : Mild mode

SW9-3

SW9-4

SW10-1 (J9)

Switch Function

Auto swing function - None Auto swing function - With Remote controller air flow – Remote controller air flow 1 speed Remote controller air flow 2 speed Remote controller air flow 3 speed

OFF

Switch

Function

Note (1) It is normally ON only in the case of SW9-4.

SW10-3

(J11)

SW10-2

(J10)

● Control change switch (SW5, SW9, SW10)

Function of DIP switch SW5 (Usually all turned OFF)

Function of DIP switch SW9 (Usually all turned OFF)

● Change by the jumper wire

Function of DIP switch SW10 (Usually all turned OFF)

Heat exchanger thermistor (Thl-R2)

Remote controller

PCB power supply connector

(Primary side)

PCB power supply connector

(Secondary side)

Fan motorConnector

(CNT)

Louver motor

J31

CNZ

SW10

SW5

SW9

SW7

SW8

SW2

J10

J11

J5J6J7

J1J2J3

CNE

IC9 IC10

LED1

CNL

C92

CNG

CNY CNJ

CNT

IC8

R62

CNM

C104

R151

CNW1

IC11

CNH

CNN1

CNB

TB,3

TB,2

TB,1

R17

R16

J31

Dip switch (SW5)

Adress switch (SW2)

Dip switch (SW9)

J9~J11 (SW10)

J5~J8 (SW8)

J1~J4(SW7)

Heat exchanger thermistor, Return air thermistor

(Thl-R1, Thl-A)

Model: FDKN series

Notes (1)

(2)

“None” means that jumper wire is not provided on the PCB or the connection is cut The replacement PCB is not equipped with jumpers J1 ~ J8. Instead, SW7 and 8, with the same functions as jumpers J1~J8, are used in the position where the jumpers were previously. Set SW7 and 8 locally in accordance with the above table.

Custom code - Change Custom code - Normal Power failure security - Effective Power failure security - Invalid Emergency operation Normal Fan control : Powerful mode Fan control : Mild mode

SW9-1

SW9-2

SW9-3

SW9-4

Switch Function

Dryness operation: 120 minutes (Louver level) Dryness operation: 60 minutes (Louver close) Dryness operation: 120 minutes (Louver close) Dryness operation: Invalid

OFF

ON ON

OFF

Switch

Function

OFF

Note (1) It is normally ON only in the case of SW9-4.

SW10-2

(J10)

SW10-1

(J9)

Wireless remote controller Wired remote controller

J1 (SW7-1)

J2 (SW7-2)

J3 (SW7-3)

J4 (SW7-4)

J5 (SW8-1)

J6 (SW8-2)

J7 (SW8-3)

J8 (SW8-4)

J31

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

Name Function

Slave c Slave b Slave a Master

SW5-2SW5-1

OFF

Setting time : 1000hrs. (Unit stop) Setting time : 1000hrs. (Display) Setting time : 600hrs. (Display) Setting time : 180hrs. (when shipped from factory)

SW5-4SW5-3

OFF

Switch

Function

● Control change switch (SW5, SW9, SW10)

Function of DIP switch SW5 (Usually all turned OFF)

Function of DIP switch SW9 (Usually all turned OFF)

● Change by the jumper wire

Function of DIP switch SW10 (Usually all turned OFF)

CNT

CNV

CNO

CNH

CNF

CNB

CNQ

CNN1

CNN2

SW2 SW10

SW5 SW7

SW9SW8

CNZ CNI

CNO

CNA

CNK2CNK1

CNW2

CNG

CNE

CNW0

CNW1

CNM3

52X3

52X5 52X4

52X2 52X1 52X6

L3L2

CNJ2 CNR

LED1

LED2

PCB power supply connector (Primary side)

PCB power supply connector (Secondary side)

Heat exchanger thermistor (Thl-R2)

Address swith (SW2)

DIP switch (SW5)

DIP switch (SW9)

J6 (SW8)

J1~J4 (SW7)

Float switch

J10~J11 (SW10)

Connector (CNT)

Drain motor

Remote controller

Power supply

Heat exchanger thermistor, Return air thermistor

(Thl-R1, Thl-A)

J1 (SW7-1)

J2 (SW7-2)

J3 (SW7-3)

J4 (SW7-4)

J6 (SW8-2)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

With

None

(1)

Name Function

Note (1)

(2)

“None” means that jumper wire is not provided on the PCB or the connection is cut The replacement PCB is not equipped with jumpers J1 ~ J4, J6. Instead, SW7 and 8, with the same functions as jumpers J1~J4, J6, are used in the position where the jumpers were previously. Set SW7 and 8 locally in accordance with the above table.

Emergency operation Normal Fan control : High speed (High Ceiling) Fan control : Standard

SW9-3

SW9-4

Switch Function

Remote controller air flow – Remote controller air flow 1 speed Remote controller air flow 2 speed Remote controller air flow 3 speed

OFF

Switch

Function

OFF

SW10-3

(J11)

SW10-2

(J10)

Slave c Slave b Slave a Master

SW5-2SW5-1

OFF

Setting time : 1000hrs. (Unit stop) Setting time : 1000hrs. (Display) Setting time : 600hrs. (Display) Setting time : 180hrs. (when shipped from factory)

SW5-4SW5-3

OFF

Switch

Function

● Control change switch (SW5, SW9, SW10)

Function of DIP switch SW5 (Usually all turned OFF)

Function of DIP switch SW9 (Usually all turned OFF)

● Change by the jumper wire

Function of DIP switch SW10 (Usually all turned OFF)

Model: FDUM series

Error display : No display LCD display : No display

[Power supply line error]

Indoor unit

Red LED

Green LED

Stays OFF

Red LED

Green LED

Stays OFF

Outdoor unit

YES

(4)

(1) (2)

(4)

(5)

NO YES

YES

NO NO

YES

Fuse OK?

Several 10K Ω or higher.

Is the voltage

between 1 and 2/N of the indoor

unit’s terminal block

AC220/240V?

Is the voltage at

CnW3 or 10

(3)

(red – red) on the

transformer’s secondary side

14 V or higher?

Voltage between

1 and 2/N of the outdoor unit’s

terminal block is

AC220/240V.

Start

Is the voltage

between CnW5 2 and 3

DC 12V?

Is the voltage

between CnW8 2 and 3

DC 12V?

Does it return

to normal when the power

supply is reset?

Notes (1) In models other than FDT, replace the fuse.

(2) FDT only

Note (3) In models other than FDT, it is CNW2.

Notes (4) 3 is GND (5) FDT only

Control lines connected wrong or disconnected.

Outdoor unit check

Fuse exchange

Transformer exchange

Harness disconnection

Unit is normal. (Malfunction was due to noise, etc.)

Replacement indoor unit power supply PCB

Replacement indoor unit control PCB

Disconnect the transformer’s primary side (CnW1) and measure the resistance on both ends of CnW1 (using a tester, etc.).

Remote controller or indication board: Inspection LED, error code

Indoor unit PCB: Red LED (inspection display), Green LED (CPU. normal display)

Outdoor unit PCB: Red LED (inspection display), Green LED (CPU. normal display)

Indoor unit

Green LED

Red LED 3 time flash

Keeps flashing

Outdoor unit

Green LED

Red LED Stays OFF

Keeps flashing

Remote

controller wiring

connect check (Red·

White·Black)

Remote controller wire

is removed

Correction

Approximately

10 ~ 11 V between

X and Z.

YES

Note (1) Z is GND.

Note (2) 3 is GND.

(2)

(1)

Power supply reset

Maltifunction by

accidental noise

YES

Normal?

YES

Remote controller wire short circuit? Remote controller defective

Remote controller wire disconnection? Remote controller defective

Remeasure

between X~Z.

10~11V.

YES

Is the voltage

between CnW8 1-3

12V?

Replacement indoor unit power supply PCB

Replacement indoor

unit control PCB

Check the

CnW5-8 harness.

Only case of FDT

Harness exchange

YES

DC approx. 12V

DC approx. 0V

Check the inverter before replacing the power fuse.

The “ WAIT ” display remains the same in the remote controller’s LCD even after the power supply has been turned on 2 minutes.

Is the LED on the outdoor

unit’s control PCB flashing?

Is the the indoor green

LED flashing?

Does the outdoor unit control

PCB red LED flashing 2 times?

Are the wires connecting the indoor

and outdoor units connected according to specifications?

Measure the voltage between

terminals 2 and 3 of the outdoor

unit’s terminal block.

Is the inverter PCB LED

(green) flashing?

Are communications lines Cn1 1-2 between the outdoor unit control PCB and inverter control PCB connected?

Measure the voltage between Cn1 1 and 2 on the communications connector (See pages 175, 176.)

Indoor unit

control PCB is

defect.

Indoor unit control PCB is faulty. Remote controller is faulty. The X or Z lines in the remote controller arc disconnected.

Are the lines connecting the indoor and outdoor units normal?

Connection line is defect (disconnected), noise.

Connect.

Connection

lines

disconnected.

YES

Is the noise filter secondary

side AC 220 ~ 240V?

Is the outdoor unit’s controller

power supply fuse 20A

disconnected?

Are the connection lines

between the noise filter and

inverter PCB good?

Area the reactor connections

good? Are they disconnected?

Replace the

inverter PCB.

Disconnect the breaker once, then after 3 minutes, turn the breaker on again.

Diagnosis if the

inverter PCB LED

1 (green) is off.

Connect the

lines

correctly.

Connect/

replace the

reactor.

Replace the noise filter.

Normal

recovery.

Is there a short between

phases in the noise filter?

Is the indoor green LED

flashing?

Is the fuse on the indoor unit

control PCB OK?

Is the outdoor red LED

flashing 2 times?

Are the wires connecting the indoor

and outdoor units connected according

to specifications?

Measure the voltage between

terminals 2 and 3 of the

outdoor unit’s terminal block.

Is the voltage on the outdoor unit’s transformer secondary

side (red – red) AC15V ?

Is the voltage between the red and

black wires in the remote

controller DC10~11V when the

remote controller is disconnected?

Remote controller does not display

after the power is turned on.

Is there a short between phases in the inverter PCB input terminals?

Is the electrolytic condenser

abnormal?

Is the power transistor module

separated or burned out?

Replace the noise

filter.

Fuse

exchange

Transformer

defect

The remote

controller

wires are

short

circuited.

Repair the

connection

lines.

Remote

controller

defect

Outdoor unit control

PCB defect

Connection wires are

faulty (disconnection)

Noise

The indoor/outdoor control PCB is faulty. The remote controller is faulty. The X or Z lines in the remote controller are disconnected.

Indoor unit

control PCB

defect

Replace the

electrolytic

condenser.

Is the reactor faulty?

Replace the

reactor.

Replace the

inverter PCB.

Replace the power

supply fuse.

Indoor unit control

PCB is defect.

Indoor unit control

PCB is defect.

Outdoor unit

control PCB is

defect.

Measure the voltage between

terminals 2/N and 3 of the indoor

unit’s terminal block.

Measure the voltage between

terminals 2/N and 3 of the indoor unit’s terminal block.

YES

Approx. 20V DC

Approx. 0V DC

Approx. 20V DC

YES

DC approx. 20V

DC approx. 0V

YES

Error display “ WAIT

”

Indoor – outdoor communications trouble (Initial (when the power is turned on)

Indoor unit

Red LED Green LED

Stays OFF

Keeps flashing

2 time flash

Keeps flashing

Red LED Green LED

Outdoor unit

If trouble occurs during communications, the error code E5 is displayed (Outdoor, Red LED flashes 2 times). The check procedure is as shown below. (However, excluding connection related problems) Also, if the power supply is reset after E5 occurs, if the trouble is intermittent, it will be displayed in the LCD(“ WAIT ”).

Notes (1)

If the breaker power supply is turned on again in a short time (within 1 minute), a “ WAIT ” message may be displayed. In this case, turn the breaker OFF and wait 3 minutes.

Item

No.

Wrong connection example

Check display

1 and 2/N reversing

1 and 3 reversing

2/N and 3 reversing

, 2/N and 3,

wrongly connected

2/N

1 2 3

Indoor Unit

Outdoor Unit

1 2 3

Indoor Unit

Outdoor Unit

1 2 3

Indoor Unit

Outdoor Unit

1 2 3

Indoor Unit

Outdoor Unit

1 2 3

Indoor Unit

Outdoor Unit

Remote Control: “ WAIT ” Indoor: Run LED keeps flashing.

Check LED stays OFF.

Outdoor: Run LED keeps flashing.

Check LED 2 time flash.

Remote Control: No-indication. Indoor: Run LED stays OFF. Check LED stays OFF. Outdoor: Run LED keeps flashing.

Check LED 2 time flash.

The power supply is not supplied to the indoor unit’s controller.

Remote Control: “ WAIT ” Indoor: Run LED keeps flashing.

Check LED stays OFF.

Outdoor: Run LED keeps flashing.

Check LED 2 time flash.

Remote Control: No-indication. Indoor: Run LED stays OFF. Check LED stays OFF. Outdoor: Run LED keeps flashing.

Check LED 2 time flash.

The power supply is not supplied to the indoor unit’s controller.

Remote Control: “ WAIT ” Indoor: Run LED keeps flashing.

Check LED stays OFF.

Outdoor: Run LED keeps flashing.

Check LED 2 time flash.

● Check display when there are 3-wire wrong connections.

Setting Method

No.

Result

● Operation when address setting is wrong

Setting Method

No.

Result

#1 Master

Slave #1

If address setting is forgotten when there are multiple slave units.

●

Remote controller display is normal.

●

Only those indoor units that are

connected directly to the outdoor unit run.

Outdoor unit runs normally.

Press the check SW and check the indoor units that are registered.

●

The remote controller display is normal.

●

Only the indoor units that are connected directly to the outdoor unit operate.

The outdoor unit operates normally.

Press the check SW and check the registered indoor units.

●

Remote controller display is normal.

●

Only the indoor units that are connected directly to the outdoor unit operate.

The outdoor unit operates normally.

Press the check SW and check the registered indoor units.

●

Remote controller continues to show

“ WAIT .” The outdoor unit’s check LED 2 time flash.

If indoor unit address setting was forgotten when controlling multiple indoor units with one remote controller.

Remote controller continues to show “ WAIT .”

Remote controller display is normal.

Press the check SW and check the registered indoor units.

If the address setting method for multiples slave units was mistaken.

If the method for setting multiple slave unit addresses was mistaken. 1 of 3 wires between indoor units.

If the method for setting multiple slave unit addresses was mistaken.

●

Remote controller continues to show

“ WAIT .”

The outdoor check LED 2 time flash.

●

Remote controller continues to show

“ WAIT .”

●

Remote controller continues to show

“ WAIT .” Indoor unit’s check LED 3 time flash (E14).

If address setting is forgotten when there are multiple slave units.

If slave remote controller address setting was forgotten.

If multiple slave units are set for a single unit.

Outdoor

Indoor

#0 Master

Indoor

#0 Master

R Master

Outdoor

Outdoor Indoor

Outdoor

Indoor

#0 Master

Indoor

#0 Master

Slave #0

Indoor

Slave #0

Remarks: If the remote control wires (red and black wires) are connected, the green indoor unit LED is stays

OFF

and the

remote controller does not work.

#1 Master

1, 2/N and 3,

wrongly connected

Error display :

[Communication error between remote controller~Indoor unit]

Indoor unit

Red LED

Green LED

Stays OFF

Keeps flashing

Stays OFF

Keeps flashing

Red LED

Green LED

Outdoor unit

Voltage

between X and Z

approximately

10~11 V?

YES

Replacement remote

controller

Voltage

fluctuates between

5~11 V between

Y and Z.

Is the

resistance between

Y~Z on the remote controller

approximately

10kΩ?

YES

Voltage

fluctuates between

5~10 V between

Y and Z

indoors.

Remote controller

wire disconnection

Voltage

fluctuates between

5~10 V between

CnB Y and Z.

❇

After the green LED lights up once, it begins flashing again continuously. The louver moves once in the close direction.

Terminal block CnB harness is defective.

Indoor unit

resets every

4 minutes.

Resistance is

approximately 10kΩ

between indoor

Y~Z.

YES

Noise

Replacement indoor

unit control PCB

Power supply reset

Normal?

Replacement

remote controller

YES

Replacement indoor

unit control PCB

Remote controller

wire short circuit

YES

Replacement remote

controller

Noise?Power supply reset

Power supply OFF

Remote controller

wire is removed

YES

❇

Indoor unit

Red LED

Green LED

Stays OFF

Stays OFF or Lights continuously

Stays OFF

Keeps flashing

Red LED

Green LED

Outdoor unit

YES

Power supply reset

Check the CnW5CnW8 harness.

Replacement indoor unit control PCB

Is it normalized?

Disconnection ?

Replacement indoor unit

power supply PCB

Harness

exchange

Transformer

exchange

Is the

voltage at the transfomer's

secondary side (red-red) 15V

or higher?

(Runaway of indoor unit CPU due to noise, etc. Transient trouble)

Unit is normal.

YES

Defective indoor unit control PCB Replace. (Defective CPU)

Is the voltage

between CnW8

2-3 12V?

Normal

The unit is normal. (The malfunction is due to noise, etc.)

Power supply reset

Lighting

Stays OFF

(1)

● Only case of FDT

● Cases of other FDT

Error display :

[Defective indoor unit heat exchanger thermistor]

Error display :

[Detective air return thermistor]

Indoor unit

Red LED

Green LED

1 time flash

Keeps flashing

Red LED

Green LED

Stays OFF

Keeps flashing

Outdoor unit

Indoor unit

Red LED

Green LED

1 time flash

Keeps flashing

Red LED

Green LED

Stays OFF

Keeps flashing

Outdoor unit

010 304020 50

5kΩ at 25˚C

Temperature (˚C)

Note (1) 22.5 kΩ at -6˚C

Air return thermistor (Th

I-A)

Indoor unit heat exchanger thermistor (Th

I-R1, R2)

Resistance temperature characteristics

Thermistor resistance (kΩ)

YES

Is the indoor

unit heat exchanger

thermistor connector

connection OK?

Correction

Are characteristics

of indoor unit heat

exchanger thermistor OK

or is there any

broken wire?

Defective indoor unit control PCB Replace-ment (Defective indoor unit heat exchanger thermistor input circuit)

Defective indoor unit heat exchanger thermistor Replacement

YES YES

Is the air return

thermistor connector

connection OK?

Correction

Is the air return

thermistor characteristics

OK or is there a

broken wire?

Defective air return thermistor Replacement

Defective indoor unit control PCB Replacement (Defective air return thermistor input circuit)

Note (1) Characteristics as per the above

graph.

● Display condition

If a temperature of –50ºC or lower is detected continuously for 5 seconds or longer by the thermistor, the compres-

sor stops. After a 3 minute delay, the compressor restarts. If this state is detected again within 60 minutes after the

first detection.

● Display condition

If a temperature of –50ºC or lower is detected continuously for 5 seconds or longer by the thermistor, the compres-

sor stops. After a 3 minute delay, the compressor restarts. If this state is detected again within 60 minutes after the

first detection.

Error display :

[Drain trouble]

Indoor unit

Red LED

Green LED

1 time flash

Keeps flashing

Red LED

Green LED

Stays OFF

Keeps flashing

Outdoor unit

Correction

Replacement indoor

unit control PCB

Replacement indoor

unit PCB

YES

Is there any

overflow?

operation

DC 12 V

at both terminals

of CnI?

YES

Abnormal data check

in remote controller

Drain motor ON from

remote controller.

YES

Is drain

piping unclogged?

Is the slop OK?

AC 220/240 V

at both terminals

of CnR?

Note (1) DM: Drain motor

YES

DM check of

motor wiring

Float switch check

DM check

(1)

Error display :

[Heating overload]

Indoor unit

Red LED

Green LED

1 time flash

Keeps flashing

Red LED

Green LED

Stays OFF

Keeps flashing

Outdoor unit

YES

Is the air filter clogged?

YES

Are the connections to

the indoor heat exchanger thermistor

OK?

Are the characteristics of

the indoor heat exchanger thermistor

OK?

Does the heating

overload state exist?

YES

Notes (1) Check if the overload state exists or not using the following check points.

Is there a short circuit? Is the indoor heat exchanger dirty or clogged? Is the outdoor unit’s fan control normal? Is the indoor or outdoor air temperature too high?

(2) See the figure page 167 for indoor heat exchanger thermistor characteristics.

((

Heating is

possible.

Abnormal stop

Indoor unit heat exchanger temp. (˚C)

Check the remote controller for abnormal data.

Clean it.

Defective indoor unit heat exchanger thermistor Replacement

Repair

Check the cooling system.

Adjust

● Display condition

An abnormal stop occurs if this state is detected 5 times within 60 minutes of the

first detection, or if the overload state is detected continuously for 6 minutes.

● Abnormal temperature detection

● Display condition

When it is detected that the float switch is open for 3 seconds continuously, when

the float switch is not connected or when it is disconnected.

Mitsubishi FDCVA302HENR, FDTCA151R, FDTA151R, FDTVA302HEN1R, FDENVA302HEN1R User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual