Mitsubishi FDTN208HEN-S, FDTN258HEN, FDTN208HEP, FDTN258HEN-S, FDTN258HEP Instruction Manual

...

183

FDTN-H

6. CEILING RECESSED TYPE PACKAGED AIR CONDITIONER

Split system, Air to air heat pump type

FDTN208HEN-S, FDTN208HEN, FDTN208HEP FDTN258HEN-S, FDTN258HEN, FDTN258HEP FDTN308HEN-S, FDTN308HES-S, FDTN308HEN FDTN308HEP, FDTN308HES FDTN408HES-S, FDTN408HES FDTN508HES-S, FDTN508HES, FDTN508HEM

FDT208HEN-S, FDT258HEN-S, FDT308HEN-S FDT308HES-S, FDT308HEN, FDT308HES FDT408HES-S, FDT408HES FDT508HES-S, FDT508HES

()

183

FDTN-H

184

FDTN-H

CONTENTS

6.1 GENERAL INFORMATION........................................................................185

6.1.1 Specific features .................................................................................185

6.1.2 How to read the model name .............................................................185

6.2 SELECTION DATA.....................................................................................186

6.2.1 Specifications......................................................................................186

6.2.2 Range of usage & limitations.............................................................212

6.2.3 Exterior dimensions............................................................................213

6.2.4 Exterior appearance ..........................................................................223

6.2.5 Piping system......................................................................................224

6.2.6 Selection chart ....................................................................................228

6.2.7 Noise level ...........................................................................................231

6.3 ELECTRICAL DATA ..................................................................................233

6.3.1 Electrical wiring ..................................................................................233

6.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER .............241

6.5 APPLICATION DATA.................................................................................256

6.5.1 Installation of indoor unit...................................................................257

6.5.2 Installation of wired remote controller..............................................260

6.5.3 Installation of outdoor unit.................................................................261

6.6 MAINTENANCE DATA...............................................................................271

6.6.1 Servicing..............................................................................................271

6.6.2 Trouble shooting for refrigerant circuit ............................................272

6.6.3 Diagnosing of microcomputer circuit ...............................................273

185

FDTN-H

6.1 GENERAL INFORMATION

6.1.1 Specific features

(1) 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%.

(2) The indoor outdoor interconnection signal wiring has been done away with. The microcomputer chip is installed in the

indoor 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.

(3) There are only four power lines between the outdoor and indoor unit. As no signal wire is used there is no need to separate the

power line from the signal line. One cab tyre cable with 6 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. (4) All air supply ports have auto swing louvers. The indoor fan motor has two speeds of high and low. (5) All models have service valves protruding from the outdoor unit for faster flare connection work in the field.

(6) Low sound level

Operating noise has been remarkably reduced due to adoption of the crescent turbo fan which cuts off wind-blowing noise

and also console type of cabinet which is highly effective to protect vibration.

(7) 700mm high drain head

Adoption of drain pump with high drain head and high capacity (600cc/min) has made it possible to have maximum 700

mm(from below ceiling drain head.[In case 700mm drain head is required, set it up close to the unit. It is impossible to do

piping on down slope.]

6.1.2 How to read the model name

Example: FDTN 20 8 H EN

Applicable power source ... See the specifications Heat pump type Series No. Norminal capacity

Model name

FDTN: Ceiling recessed type unit with

wireless remote controller

FDT: Ceiling recessed type unit with

wired remote controller

FDC: Outdoor unit

196

FDTN-H

Model FDTN308HEN

Operation data

(3)

Item

Model

FDTN308H FDC306HEN3

Nominal cooling capacity

(1)

W 7100

Nominal heating capacity

(1)

W 7300

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

Cooling input kW 3.07/3.11 Running current (Cooling) A 15.6/16.3 Power factor (Cooling) % 89/79 Heating input kW 2.82/2.86 Running current (Heating) A 14.5/15.2 Power factor (Heating) % 88/78 Inrush current (L.R.A) A 89 Noise level

(4)

dB(A) Hi 41 Lo:35 56

Exterior dimensions

Unit 260 × 840 × 840

844 × 950 × 340

Height × Width × Depth Panel 30 × 950 × 950

Net weight kg 30 (Unit:24 Panel:6) 69 Refrigerant equipment

– RC5532ENE1 × 1

Compressor type & Q’ty

Motor kW – 2.24 Starting method – Line starting

Heat exchanger Louver fins & inner grooved tubing Slitted fins & bare tubing Refrigerant control Capillary tube Capillary tube

Refrigerant R22

Quantity kg Holding charged

1.3 [Pre-charged up to the piping length of 5m]

Refrigerant oil r – 1.63 (SUNISO 3GS)

Defrost control IC controlled de-icer High pressure control High pressure regulator valve

Air handling equipment

Fan type & Q’ty

Turbo fan × 1 Propeller fan × 1

Motor W 30 × 1 60 × 1 Starting method Line starting Line starting

Air flow (Standard) CMM Hi:17 Lo:12 54 Fresh 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 – 40 (Crank case heater)

Operation control

Operation switch Wireless remote control switch – (Indoor unit side)

Room temperature control Thermostat by electronics – Safety equipment Internal thermostat for fan motor. Internal thermostat for fan motor.

Frost protection thermostat.

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) –

Insulation for piping Necessary (both Liquid & Gas lines) Accessories Mounting kit. Wireless remote controller. Drain hose Optional parts Decorative Panel

(2) This packaged air conditioner is manufactured and tested in conformity with the following standard. JIS B8616 “UNITARY AIR CONDITIONERS” (3) The operation data indicate when the air conditioner is operated at 220V and 240V respectively. (4) Indicates the value at mild mode.

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, JIS B8616

FDTN308HEN

Internal protector for compressor. Internal thermostat for fan motor. Internal pressure relief valve for compressor.

198

FDTN-H

Operation data

(3)

Item

Model

FDTN308H FDC306HES3

Nominal cooling capacity

(1)

ISO-T1

7100/7700

ISO-T3 6000

Nominal heating capacity

(1)

ISO-T1 W 7300/7900

Power source 3 Phase, 380-415V 50Hz or 380V 50Hz/415V 50Hz, 380V 60Hz

Cooling input kW 2.83/2.84/3.35 Running current (Cooling) A 5.3/5.3/6.0 Power factor (Cooling) % 81/75/85 Heating input kW 2.50/2.51/2.90 Running current (Heating) A 4.9/5.0/5.6 Power factor (Heating) % 78/70/79 Cooling input kW 3.58 Running current (Cooling) A 6.5

Power factor (Cooling) % 84 Inrush current (L.R.A) A 43 Noise level

(4)

dB(A) Hi:41 Lo:35 56

Exterior dimensions

Unit 260 × 840 × 840

844 × 950 × 340

Height × Width × Depth Panel 30 × 950 × 950

Net weight kg 30 (Unit:24 Panel:6) 69 Refrigerant equipment

– RC5538ESE1 × 1

Compressor type & Q’ty

Motor kW – 2.24 Starting method – Line starting

Heat exchanger Louver fins & inner grooved tubing Slitted fins & bare tubing Refrigerant control Capillary tube Capillary tube

Refrigerant R22

Quantity kg Holding charged

1.3 [Pre-charged up to the piping length of 5m]

Refrigerant oil r – 1.63 (SUNISO 3GS)

Defrost control IC controlled de-icer High pressure control High pressure regulator valve

Air handling equipment

Fan type & Q’ty

Turbo fan × 1 Propeller fan × 1

Motor W 30 × 1 60 × 1 Starting method Line starting Line starting

Air flow (Standard) CMM Hi:17 Lo:12 54/56 Fresh 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 – 40 (Crank case heater)

Operation control

Operation switch Wireless remote control switch – (Indoor unit side)

Room temperature control Thermostat by electronics – Safety equipment Internal thermostat for fan motor. Internal thermostat for fan motor.

Frost protection thermostat.

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) –

Insulation for piping Necessary (both Liquid & Gas lines) Accessories Mounting kit. Wireless remote controller. Drain hose Optional parts Decorative Panel

Model FDTN308HES

ISO-T1ISO-T3

(2) This packaged air conditioner is manufactured and tested in conformity with the following standard. JIS B8616 “UNITARY AIR CONDITIONERS” (3) The operation data indicate when the air conditioner is operated at 380/415V 50Hz and 380V 60Hz respectively. (4) Indicates the value at mild mode.

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, JIS B8616

Cooling 29˚C 19˚C 46˚C 24˚C ISO-T3, SASO

FDTN308HES

Internal protector for compressor. Internal thermostat for fan motor. Internal pressure relief valve for compressor.

200

FDTN-H

Operation data

(3)

Item

Model

FDTN508H FDC506HES3

Nominal cooling capacity

(1)

ISO-T1

12500/14000

ISO-T3 11900

Nominal heating capacity

(1)

ISO-T1 W 12800/14400

Power source 3 Phase, 380-415V 50Hz or 380V 50Hz/415V 50Hz, 380V 60Hz

Cooling input kW 4.87/4.87/5.83 Running current (Cooling) A 10.0/10.0/11.0 Power factor (Cooling) % 74/68/81 Heating input kW 4.49/4.51/5.41 Running current (Heating) A 9.2/9.3/10.2 Power factor (Heating) % 74/67/81 Cooling input kW 6.43 Running current (Cooling) A 12.0

Power factor (Cooling) % 81 Inrush current (L.R.A) A 68 Noise level

(4)

dB(A) Hi:49 Lo:43 59

Exterior dimensions

Unit 320 × 840 × 840

1250 × 950 × 340

Height × Width × Depth Panel 30 × 950 × 950

Net weight kg 36 (Unit:30 Panel:6) 91 Refrigerant equipment

– RC5563ESE2 × 1

Compressor type & Q’ty

Motor kW – 3.73 Starting method – Line starting

Heat exchanger Louver fins & inner grooved tubing Slitted fins & bare tubing Refrigerant control Capillary tube Capillary tube

Refrigerant R22

Quantity kg Holding charged

2.3 [Pre-charged up to the piping length of 5m]

Refrigerant oil r – 2.07 (SUNISO 3GS)

Defrost control IC controlled de-icer High pressure control High pressure regulator valve

Air handling equipment

Fan type & Q’ty

Turbo fan × 1 Propeller fan × 2

Motor W 130 × 1 60 × 2 Starting method Line starting Line starting

Air flow (Standard) CMM Hi:28 Lo:20 100/110 Fresh 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 – 40 (Crank case heater)

Operation control

Operation switch Wireless remote control switch – (Indoor unit side)

Room temperature control Thermostat by electronics – Safety equipment Internal thermostat for fan motor.

Frost protection thermostat.

Installation data mm

Liquid line: φ9.52 (3/8″) Gas line: φ19.05 (3/4″)

Refrigerant piping size (in)

Connecting method Flare piping

Drain hose (Connectable with VP25) –

Insulation for piping Necessary (both Liquid & Gas lines) Accessories Mounting kit. Wireless remote controller. Drain hose Optional parts Decorative Panel

Model FDTN508HES

ISO-T1ISO-T3

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, JIS B8616

Cooling 29˚C 19˚C 46˚C 24˚C ISO-T3, SASO

(2) This packaged air conditioner is manufactured and tested in conformity with the following standard. JIS B8616 “UNITARY AIR CONDITIONERS” (3) The operation data indicate when the air conditioner is operated at 380/415V 50Hz and 380V 60Hz respectively. (4) Indicates the value at mild mode.

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

FDTN508HES

Internal protector for compressor. Internal thermostat for fan motor. Internal pressure relief valve for compressor.

212

FDTN-H

Models FDTN208~508 (FDC208~508 type)

FDT208~508 (FDC208~508 type)

6.2.2 Range of usage & limitations

Models FDTN208, 258 (FDC208, 258 type) FDTN308~508 (FDC308~508 type)

Item FDT208, 258 (FDC208, 258 type) FDT308~508 (FDC308~508 type) Indoor return air temperature

(Upper, lower limits) Outdoor air temperature

(Upper, lower limits) 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

Frequency of ON-OFF cycle

ON and OFF interval

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

Refer to the selection chart

Max. 30m Max. 50m

Max. 10 times/h

Max. 3 minutes

Min. 85% of rating

Rating ± 10%

Max. 20m (Outdoor unit is higher) Max. 30m (Outdoor unit is higher) Max. 15m (Outdoor unit is lower) Max. 15m (Outdoor unit is lower)

Models FDTN208~508 (FDC206~506 type)

FDT308~508 (FDC306~506 type)

Indoor return air temperature (Upper, lower limits)

Outdoor air temperature (Upper, lower limits)

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

Frequency of ON-OFF cycle

ON and OFF interval

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

Refer to the selection chart

Max. 30m

Max. 10 times/h

Max. 3 minutes

Min. 85% of rating

Rating ± 10%

Max. 15m

Models FDTN208~508 (FDC206~506 type)

Item FDT308~508 (FDC306~506 type)

214

FDTN-H

Unit : mm

Decorative Panel

VIEW A

VIEW DVIEW C

VIEW B

Space for installation and service

Liquid piping

φ9.52(3/8")

860~890

(Ceiling hole size)

267

310332

675

(Suspension bolts pitch)

637

422

420

400

780

(Suspension bolts pitch )

Fresh air

opening for ducting

Exhaust air opening for ducting

Drain hose (Accessories)

(Connectable with VP25)

Gas piping ( φ15.88)

(M10 or M8 ×4pcs.)

B→

Air inlet grille

Air outlet grille

630

950

295~325

700

or less

(Max. Drain up)

210

137

187

260

or more

Lug for suspension bolts

Control box

Hole for wiring

Suspension bolts

↑

840

1000

Obstacle

or more

160 33

113

140

Holes for tapping screws

4-φ4

112

100

140

Holes for tapping screws

6-φ4

D→

↑

Indication boad (Only case of FDTN type)

Models FDTN258H, 308H

FDT258, 308

215

FDTN-H

Models FDTN408H, 508H

FDT408, 508

Liquid piping φ9.52(3/8")

860~890

(Ceiling hole size)

267

310332

675

(Suspension bolts pitch)

637

422

420

400

780

(Suspension bolts pitch )

Fresh air opening for ducting

Exhaust air opening for ducting

Drain hose (Accessories) (Connectable with VP25)

Gas piping

φ19.05(3/4")

(M10 or M8 ×4pcs.)

B→

Air inlet grille

Air outlet grille

630

950

295~325

700

or less

(Max. Drain up)

270

137

187

320

or more

Lug for suspension bolts

Control box

Hole for wiring

Suspension bolts

↑

840

1000

Obstacle

or more

55 25

160 93

113

140

Holes for tapping screws

4-φ4

112

100

140

Holes for tapping screws

6-φ4

D→

↑

Indication board (Only case of FDTN type)

Unit : mm

Decorative Panel

VIEW A

VIEW DVIEW C

VIEW B

Space for installation and service

216

FDTN-H

(2) Remote controller

(a) Wireless remote controller

Unit: mm

MODE TEMP ON/OFF

AUTO COOL DRY FAN HEAT

FILTER

AM PM

OFF

FAN HI LO

20.5

161.5

● Indication board of indoor unit

Remote controller mounting dimensions

Standard Within 0.3 mm

× Within 100 m

0.5 mm

× Within 200 m

0.75 mm

× Within 300 m

1.25 mm

× Within 400 m

2 mm

× Within 600 m

Allowable rang of wire thickness and length

♦ Usable JIS box, JIS C 8336 ⋅ Switch box for 1 piece (without cover)

(use of the mark hole as illustrated on the left) ⋅ Switch box for 2 pieces (use of the mark hole as illustrated on the left) (without cover) (use of the mark hole as illustrated on the left) (when installing the cover)

Note (1) Allowable length of remote controller cable: 600 m

0.3mm2, 3cores (O.D.φ5.6)

LCD display

120

Wall

Wire

(Recessed)

Junction box

(Locally Purchased)

83.5

120

Remote controller outline

For the passage after wiring

120

60 46

(b) Wired remote controller

Unit: mm

218

FDTN-H

Liquid piping: ø9.52 (3/8") (Flare connecting)

Gas piping: ø15.88 (5/8")

Terminal block

Opening for electric wiring

Holes for anchor bolt

(M10 × 4 pcs.)

Holes for drain (ø9.52 × 3pcs.)

Electric wiring

Opening for piping and electric wiring

(Flare connecting)

845

380 1515

340

15103

150

7050

3535

110

460

110

195

880

310222

Air inlet

Air outlet

Maintenance space

150 580 150

50 15

15 50

50 5027

50 15

Models FDC258HEN3, 308HEN3, 308HES3

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

Unit:mm

Mark

123

L1 Open Open 500 L2 300 5 Open L3 100 150 100 L4 555

Installation

type

Notes (1) Avoid the location where four sides are entirel y

surrounded by walls.

(2) Fix the unit by anchor bolts without fail. Restrict

the protrusion length of anchor bolt to 15 mm and under.

(3) When strong wind blows against the unit, direct

the discharge port at a right angle to the wind

direction. (4) Secure the space of 1 m and over at the top of unit. (5) Make the height of obstruction wall in front of

discharge port lower than the height of unit.

Unit: mm

VIEW A

Liquid piping: ø9.52 (3/8") (Flare connecting)

Gas piping: ø15.88 (5/8") (Flare connecting)

219

FDTN-H

110

195

555

578

920

100

165

580

175

380 15

103

5050

50 110

195

50 15

295237

340

150

Gas piping: ø 19.05 (3/4")

(Flare connecting)

Liquid piping: ø 9.52 (3/8")

(Flare connecting)

Opening for electric wiring

Holes for drain (ø 20 × 3pcs.)

Opening for electric wiring

Opening for piping and electric wiring

Electric wiring

Opening for piping and electric wiring

Holes for anchor bolt

(M10 × 4pcs.)

Gas piping: ø 19.05 (3/4")

(Flare connecting)

Liquid piping: ø 9.52 (3/8")

(Flare connecting)

Opening for electric wiring

Terminal block

1250 (1050)

Note (1) The ( ) value dimension for model FDC408HES3.

Air inlet

Air outlet

Maintenance space

Models FDC408HES3, 508HES3

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

Unit:mm

Mark

123

L1 Open Open 500 L2 300 5 Open L3 150 300 150 L4 555

Installation

type

Notes (1) Avoid the location where four sides are entirel y

surrounded by walls. (2) Fix the unit by anchor bolts without fail. Restrict

the protrusion length of anchor bolt to 15 mm

and under. (3) When strong wind blows against the unit, di-

rect the discharge port at a right angle to the

wind direction. (4) Secure the space of 1 m and over at the top of unit. (5) Make the height of obstruction wall in front of

discharge port lower than the height of unit.

VIEW A

Unit: mm

221

FDTN-H

Mark

123

L1 Open Open 500 L2 300 0 Open L3 100 150 100

Installation

type

Notes (1) Fix the unit with anchor bolts. (2) Strong wind must not be directed to the air

outlet.

(3) Free space over the unit must be larger than

1 m.

(4) The unit should not be surrounded by

obstructions in all direction. At least one direction around the unit must be free.

Models FDC306HEN3, 306HEP3, 306HES3

Minimum allowable space to the obstacles

Unit:mm

Required space for maintenance and air flow

Unit: mm

Anchor bolts (M10 × 4 pcs)

580

380

222

FDTN-H

Notes (1) Fix the unit with anchor bolts. (2) Strong wind must not be directed to the air

outlet.

(3) Free space over the unit must be larger than

1 m.

(4) The unit should not be surrounded by

obstructions in all direction. At least one direction around the unit must be free.

Minimum allowable space to the obstacles

Models FDC406HES3, 506HES3, 506HEM3

Unit:mm

Mark

123

L1 Open Open 500 L2 300 0 Open L3 150 300 150

Installation

type

Required space for maintenance and air flow

Unit: mm

580

380

223

FDTN-H

6.2.4 Exterior appearance

(1) Indoor unit

Models All models

(2) Outdoor unit

Model FDC208HEN3

Models FDC306HEN3, 306HEP3,

306HES3

Models FDC406HES3, 506HES3

506HEM3

Pearl white

(Decorative panel)

Polar white

Models FDC258HEN3, 308HEN3,

308HES3

Type

Item

Panel model Remarks

FDTN208H TN-PSC-22W-E

FDTN258H~508H TN-PSC-32W-E

FDT208 T-PSA-22W-E

Without swing

FDT258~508 T-PSA-32W-E

For wireless remote controller

For wired remote controller

Models FDC408HES3, 508HES3

Models FDC206HEN3, 206HEP3

256HEN3, 256HEP3

Polar white

225

FDTN-H

Models FDTN208HEN, 208HEP, 258HEN, 258HEP

Models FDTN508HES-S, FDT508HES-S

Indoor unit

Outdoor unit

Thermistor

(Th

-R)

Thermistor

(Th

-D)

Thermistor

(Th

-R)

Solenoid

valve (SV2)

Solenoid

valve (SV1)

Thermistor

(Th

-A)

Thermistor

(Th

-A)

Heat exchanger

High pressure switch (63H

)

(For fan motor control)

Strainer

Strainer Strainer

StrainerCapillary

tube

Capillary tube

Capillary

tube

Capillary tube

Liquid line

(ø9.52)

Gas line (ø19.05)

Flare connecting

Service valve

(Flare connecting)

Service valve

(Flare connecting)

Cooling cycle Heating cycle

4way valve

Compressor

Accumulators

Check valve

Check

joint

Check joint

Oil separator

Subcooling coil

Indoor unit

Outdoor unit

226

FDTN-H

Thermistor (Th

I-A)

Heat exchanger

Liquid line (ø9.52)

Strainer Strainer

Compressor

Accumlator

StrainerStrainer

Thermistor (Th

I-R)

Service valve (Flare connecting)

Capillary tube

High Pressure regulator valve

Defrost Thermostat

Check joint

Heat exchanger

4way valve

High pressure switch

(For fan motor control)

Service valve (Flare connecting)

Check joint

Gas line (ø19.05)

(23DH)

Thermistor (Th

-A)

Heat exchanger

Liquid line (ø9.52)

Strainer Strainer

Compressor

StrainerStrainer

Thermistor (Th

-R)

Service valve (Flare connecting)

Capillary tube

High Pressure regulator valve

Defrost Thermostat

Check joint

Heat exchanger

4way valve

High pressure switch (For fan motor control)

Service valve (Flare connecting)

Check joint

Gas line (ø15.88)

(23DH)

Indoor unit

Outdoor unit

Models FDTN308HEN, 308HEP, 308HES

FDT308HEN, 308HES

Models FDTN408HES, 508HES, 508HEM

FDT408HES, 508HES

Cooling cycle Heating cycle

Indoor unit

Outdoor unit

Cooling cycle Heating cycle

227

FDTN-H

Preset point of the protective devices

Parts name Mark

Thermistor (for protection overloading in heating)

Thermistor (for frost prevention)

Thermistor (for detecting discharge pipe temp.)

Thermistor (for detecting heat exchange temp.)

High pressure switch (for controlling FM0)

OFF 68˚C

ON 61˚C

Equipped

unit

ThI-R

Tho-D

Tho-R

63H2

Indoor unit

Outdoor unit

FDTN308~508

(FDC308~508 type only)

FDT308~508

OFF 2.5˚C

ON 10˚C

OFF 135˚C

ON 90˚C

OFF 70˚C

ON 60˚C

OFF 2.5MPa (25.5 Kgf/cm2G)

ON 2.06MPa (21 kgf/cm2G)

Parts name Mark

Thermistor (for protection overloading in heating)

Thermistor (for frost prevention)

Defrost thermostat

High pressure switch (for controlling FMo)

OFF 68˚C ON 61˚C

Equipped

unit

THI-R

23DH

63H2

Indoor unit

Outdoor unit

FDTN208~508

(FDC208, 258 or FDC206~506 type only)

FDT208~508

OFF 2.5˚C ON 10˚C

OFF 12˚C ON -6˚C

OFF 2.5MPa (25.5 Kgf/cm2G)

ON 1.86MPa (19 kgf/cm2G)

228

FDTN-H

Outdoor air W.B. temperature (˚CW.B.)

Indoor air W.B. temperature (˚CW.B.)

ISO-T1 Standard condition

(b) Only case of ISO-T1 models (Including 308HEN-S, 308HES-S, 408HES-S, 508HES-S type)

Indoor air W.B. temperature (˚CW.B.)

ISO-T1 Standard condition

Outdoor air D.B.

temperature (˚CD.B.)

Cooling operation

Indoor air D.B.

temperature (˚CD.B.)

Heating operation

Coefficient of cooling and heating capacity

in relation to temperatures

Outdoor air D.B.

temperature (˚CD.B.)

Cooling operation

Indoor air D.B.

temperature (˚CD.B.)

Heating operation

Coefficient of cooling and heating

capacity in relation to temperatures

6.2.6 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) Only case of ISO-T1 models (Except 308HEN-S, 308HES-S, 408HES-S, 508HES-S type)

ISO-T1 Standard condition

Outdoor air W.B. temperature (˚CW.B.)

229

FDTN-H

Item

Air flow

Hi 0.112 0.050 0.065 0.076 0.025

Lo 0.073 0.030 0.030 0.050 0.013

Model

208 type 258 type 308 type 408 type 508 type

(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

Outdoor air W.B. temperature (˚CW.B.)

Table of bypass factor

ISO-T1 Standard condition

Indoor air W.B. temperature (˚CW.B.)

ISO-T1 Standard condition

Outdoor air D.B.

temperature (˚CD.B.)

Cooling operation

Indoor air D.B.

temperature (˚CD.B.)

Heating operation

Coefficient of cooling and heating capacity

in relation to temperatures

230

FDTN-H

Equivalent piping length

(1)

m 5 10152025303540455055

Heating 1.0 1.0 1.0 1.0 1.0 0.995 0.995 0.99 0.99 0.985 0.985

FDTN, FDT208 type 1.0 0.995  FDTN, FDT258 type 1.0 0.995 0.99 0.985 0.98 0.975 0.97 

1.0 0.99

0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 0.9

1.0

0.995 0.985 0.98 0.97 0.965 0.955 0.95 0.94 0.935 0.925

1.0

0.99 0.975 0.965 0.95 0.94 0.925 0.915 0.9 0.89 0.875

1.0 0.99 

1.0 

(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.

Note (1) Equivalent piping length can be obtained by calculating as follows.

208, 258, 308 series [φ15.88(5/8″)]: Equivalent piping length = Real piping length + (0.10 × Number or bends in piping) 408, 508, series [φ19.05(3/4″)]: Equivalent piping length = Real piping length + (0.15 × Number of bends in piping) [Equivalent piping length < Limitation length of piping + 5m]

(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.

50/60Hz

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

Piping length limitations

Item

Model FDTN, FDT208, 258 FDTN, FDT308~508 FDTN, FDT208~508

Max. one way piping length 30m 50m 30m

Max. vertical height difference

Outdoor unit is higher 20m Outdoor unit is higher 30m

15m

Outdoor unit is lower 15m Outdoor unit is lower 15m

Note (1) Values in the table indicate the one way piping length between the indoor and outdoor units.

How to obtain the cooling and heating capacity

Example : The net cooling capacity of the model FDTN308HEN-S 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 = 7100 × 1.00 × (0.98 - 0.01) × 1.0 = 6887 w

Factor by air temperatures

FDTN308HEN-S Air flow

“High”

Length 15m. Height difference 5 m

0.995 0.99 0.985 0.985 0.98 /0.99 /0.985 /0.98 /0.975 /0.97

Cooling

FDTN, FDT308 type

(FDC308 type)

FDTN, FDT408 type

(FDC408 type)

FDTN, FDT508 type

(FDC508 type)

FDTN, FDT308 type

(FDC306 type)

FDTN, FDT408 type

(FDC406 type)

FDTN, FDT508 type

(FDC506 type)

0.98 0.97 0.96 0.95 0.94

/0.975 /0.965 /0.95 /0.94 /0.925

0.995 0.985 0.98 0.97 0.965 0.955 /0.99 /0.98 /0.97 /0.96 /0.95 /0.94

0.99 0.975 0.965 0.95 0.94 0.925

/0.985 /0.97 /0.955 /0.94 /0.925 /0.91

(FDC208, 258 type) (FDC308~508 type) (FDC206~506 type)

231

FDTN-H

6.2.7 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.

Indoor unit Measured based on JIS B 8616

Mike position as below

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

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

(1) Indoor unit

Outdoor unit Measured based on JIS B 8616

Mike position: at highest noise level

in position as below Distance from front side 1 m Height 1 m

Models FDTN208H, FDT208

Noise level 38 dB (A) at HIGH

33 dB (A) at LOW

Models FDTN258H, FDT258

Noise level 39 dB (A) at HIGH

35 dB (A) at LOW

Models FDTN308H, FDT308

Noise level 41 dB (A) at HIGH

35 dB (A) at LOW

Models FDTN408H, FDT408

Noise level 48 dB (A) at HIGH

40 dB (A) at LOW

Models FDTN508H, FDT508

Noise level 49 dB (A) at HIGH

43 dB (A) at LOW

(2) Outdoor unit

Mike (center & low points)

Model FDC206HEN3

Noise level 56 dB (A)

Mid octave band frequency (Hz)

N20

N70

63 125 250 500 1000 2000 4000 8000

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N20

63 125 250 500 1000 2000 4000 8000

N40

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N30

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

N40

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N30

N20

63 125 250 500 1000 2000 4000 8000

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N20

63 125 250 500 1000 2000 4000 8000

Sound pressure level

(Standard 0.0002µ bar) dB

Model FDC208HEN3

Noise level 52 dB (A)

Model FDC206HEP3

Noise level 56 dB (A)

Mid octave band frequency (Hz)

N30

N20

N70

63 125 250 500 1000 2000 4000 8000

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N20

63 125 250 500 1000 2000 4000 8000

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N30

N20

N50

N60

63 125 250 500 1000 2000 4000 8000

N40

Sound pressure level

(Standard 0.0002µ bar) dB

232

FDTN-H

Model FDC306HES3

Noise level 56 dB (A)

Model FDC306HEN3

Noise level 56 dB (A)

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N20

63 125 250 500 1000 2000 4000 8000

Model FDC306HEP3

Noise level 56 dB (A)

Mid octave band frequency (Hz)

N20

N50

63 125 250 500 1000 2000 4000 8000

Sound pressure level

(Standard 0.0002µ bar) dB

Model FDC406HES3

Noise level 57 dB (A)

Model FDC408HES3

Noise level 54 dB (A)

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N30

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

N40

Models FDC506HES3, 506HEM3

Noise level 59 dB (A)

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N30

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

N40

Model FDC258HEN3

Noise level 52 dB (A)

Mid octave band frequency (Hz)

N20

N50

63 125 250 500 1000 2000 4000 8000

N40

Sound pressure level

(Standard 0.0002µ bar) dB

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N30

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

N40

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N30

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

N40

Models FDC308HEN3, 308HES3

Noise level 52 dB (A)

Model FDC256HEN3

Noise level 57 dB (A)

Model FDC256HEP3

Noise level 57 dB (A)

Model FDC508HES3

Noise level 55 dB (A)

Mid octave band frequency (Hz)

N20

N50

63 125 250 500 1000 2000 4000 8000

N40

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N20

63 125 250 500 1000 2000 4000 8000

Sound pressure level

(Standard 0.0002µ bar) dB

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N20

63 125 250 500 1000 2000 4000 8000

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N20

63 125 250 500 1000 2000 4000 8000

234

FDTN-H

Outdoor Unit

RD/WH

BK/WH

BK/RD

BL/WH

BR/WH

Y/GN

Tho-R

63H

CnL

LED-R

LED-G

(Check)

(Run)

CnE

Vao

(Checker)

CnA1

Tro

CnA2

Tho-D

Tho-A

14V

BL/WH BK/RD BR/WH BL BL BL BL P P

BR BR

BK BK

2625232221201918171613122

Printed Circuit Board

HLUH

CnR

CnM

X04X

X02X05X

X03X

2/N

345

F(3.15A)

OR/WH OR/WH OR

OR WH BR BL BK

Y/GN

BK/WH

CT1

52C

RD/WH RD BK/WH

52C20S

(49FO1)

220/240V

(49F

)

Y / GN

OR OR

WH Y / GN

CnJ

CnF

WHWH

RDWH

CnF

CnJ

CnR

CnI

CnR

X2X

Val

CnTCnHCnNCnLCnV

CnB

CnA

CnN

CnH

ThI–A

ThI–R

BK BK

RDBKBR

CnW

CnQ

TrI

Test

XR1

XR2

XR3

XR4

XR5

Option

Receiver amp

Wireless

remote

controller

LED1

LED2

( 3 )

SW2

SW3

ONONOFF

OFF

1 2 3 4

Indoor Unit

220/240V

12V

CnSCnB

Remote

controller

BKBKRDWHBK

RD WH BK

Thc

BK LS

CnS2

Only case of FDT series.

YYZZX

Printed wiring board

Power source

1 Phase 220/240V 50Hz

Models FDTN308HEN-S

FDT308HEN-S

Color mark

Mark Color

BK Black

BL Blue

BR Brown

GR Gray

OR Orange

PK Pink

RD Red

WH White

Y Yellow

Mark Color

BK/RD Black/Red

BK/WH Black/White

BL/WH Blue/White

BR/WH Brown/White

OR/WH Orange/White

RD/WH Red/White

Y/GN Yellow/Green

]

This diagram indicates the FDTN series. Section from

1 changes on

the FDT series.

[

Meaning of marks

Mark Parts name Mark Parts name

CC Capacitor for CM Th

Thermistor

I Capacitor for FM

ThI-A Thermistor

O Capacitor for FM

ThI-R Thermistor

CH Crankcase heater Tho-A Thermistor

CM Compressor motor Tho-D Thermistor

CnA ~ W Connector (□ mark) Tho-R Thermistor

1 Current sensor Tr

Transformer (Indoor unit)

F Fuse Tr

Transformer (Outdoor unit)

I Fan motor (Indoor unit) Val VaristorFMO Fan motor (Outdoor unit) Vao Varistor

LED1 Indication lamp (Green - Run) 20S 4-way valve solenoid

LED2 Indication lamp

(Yellow - Timer/Check)

49FI

Internal thermostat for FM

LM Louver motor 49F

Internal thermostat for FMo

LS Limit switch 52C Magnetic contactor for CM

PC Photo coupler X1~7 Auxiliary relay

1,2 Solenoid coil (for control) X01~8 Auxiliary relay

SW Switch (ON/OFF) 63H

High pressure switch (for control)

SW2, 3 Changeover switch v Terminal (F)

TB Terminal block (嘷 mark) ■ Connector

DM Drain motor LED-G Indication lamp (Green)

FS Float switch LED-R Indication lamp (Red)

235

FDTN-H

Power source

3 Phase 380/415V 50Hz

Indoor Unit

Outdoor Unit

RD/WH

BK/WH

BK/RD

BL/WH

BR/WH

Y/GN

Tho-R

63H

CnL

LED-R

LED-G

(Check)

(Run)

CnE

Vao

(Checker)

CnA1

Tro

CnA2

Tho-D

Tho-A

14V

BL/WH BK/RD BR/WH BL BL BL BL P P

BR BR

BK BK

26252322212019181716131221

Printed Circuit Board

220/240V

CnR

CnM

X04X

X02X05X

03X06

2/N

345

F(3.15A)

OR/WH OR/WH OR

OR WH BR BL BK

Y/GN

RDWHBL

BK/WH

CT2CT1

52C

RD/WH RD BK/WH WH

L3L

52C

20S

(49F

)

(49F

)

Y/GN

CnJ

CnF

WHWH

RDWH

CnF

CnJ

CnR

CnI

CnR

X2X

Val

CnT

CnH

CnN

CnL

CnV

CnB

CnA

CnN

CnH

ThI–A

ThI–R

BK BK

RDBKBR

CnW

CnQ

TrI

Test

XR1

XR2

XR3

XR4

XR5

Option

Receiver amp

Wireless

remote

controller

LED1

LED2

( 3 )

SW2

SW3

ONONOFF

OFF

1 2 3 4

220/240V

12V

2/N

345

CnSCnB

Remote

controller

BKBKRDWHBK

RD WH BK

Thc

BK LS

CnS2

Only case of FDT series.

YYZZX

Printed wiring board

Models FDTN308HES-S

FDT308HES-S

Color mark

Mark Color

BK Black

BL Blue

BR Brown

GR Gray

OR Orange

P Pink

RD Red

WH White

Mark Color

BK/RD Black/Red

BK/WH Black/White

BL/WH Blue/White

BR/WH Brown/White

OR/WH Orange/White

RD/WH Red/White

Y/GN Yellow/Green

]

This diagram indicates the FDTN series. Section from

1 changes on

the FDT series.

[

Meaning of marks

Mark Parts name Mark Parts name

Capacitor for FMI

ThI

-R Thermistor

Capacitor for FMO

Tho-A Thermistor

CH Crankcase heater Tho-D Thermistor

CM Compressor motor Tho-R Thermistor

CnA ~ Z Connector (□ mark) TrI

Transformer (Indoor unit)

1,2

Current sensor Tr

Transformer (Outdoor unit)

F Fuse Val Varistor

Fan motor (Indoor unit) Vao Varistor

Fan motor (Outdoor unit) 20S 4-way valve solenoid

Louver motor

49F

I Internal thermostat for FM

LS Limit switch 49F

O1 Internal thermostat for FMo

DM Drain motor 52C Magnetic contactor for CM

FS Float switch X1~7 Auxiliary relay

PC Photo coupler X

01~08

Auxiliary relay

1,2

Solenoid coil (for control) 63H

2 High pressure switch (for control)

SW Switch (ON/OFF) v Terminal (F)

SW2, 3 Changeover switch ■ Connector

TB Terminal block (嘷 mark) LED-G Indication lamp (Green)

Thc Thermistor LED-R Indication lamp (Red)

ThI-A Thermistor

236

FDTN-H

Indoor Unit

Outdoor Unit

RD/WH

BK/WH

BK/RD

BL/WH

BR/WH

Y/GN

Tho-R

63H

CnL

LED-R

LED-G

(Check)

(Run)

CnE

Vao

(Checker)

CnA1

Tro

CnA2

Tho-D

Tho-A

14V

BL/WH BK/RD BR/WH BL BL BL BL P P

BR BR

BK BK

26252322212019181716131221

Printed Circuit Board

220/240V

CnR

CnM

X04X

X05X

2/N

345

F(3.15A)

OR/WH OR/WH OR

OR WH BR BL BK

Y/GN

RDWHBL

BK/WH

CT2CT1

52C

RD/WH RD BK/WH WH

L3L

52C20S

(49F

)

1514

CnM2

GR GR OR

OR WH BR BL BK

(49F

)

FMI

(49F

)

Y/GN

WH Y/GN

CnJ

CnF1

CFI

WHWH

RDWH

CnF

CnJ

CnR

CnI

CnR

X4X7X5

Val

CnT

CnH

CnN

CnL

CnV

CnB2

CnB

CnA

CnN

CnH

ThI–A

ThI–R

BK BK

RDBKBR

CnW

CnQ

TrI

Test

XR1

XR2

XR3

XR4

XR5

Option

Receiver amp

Wireless

remote

controller

LED1

LED2

( 3 )

SW2

SW3

ONONOFF

OFF

1 2 3 4

Printed wiring board

220/240V

12V

2/N

345

CnSCnB

Remote

controller

BKRDWH

RD WH BK

Thc

BK LS

CnS2

Only case of FDT series.

YYZZX

Models FDTN408HES-S, 508HES-S

FDT408HES-S, 508HES-S

Power source

3 Phase 380/415V 50Hz

]

This diagram indicates the FDTN series. Section from

1 changes on

the FDT series.

[

Meaning of marks

Mark Parts name Mark Parts name

I Capacitor for FM

ThI-R Thermistor

O1,2 Capacitor for FM

Tho-A Thermistor

CH Crankcase heater Tho-D Thermistor

CM Compressor motor Tho-R Thermistor

CnA ~ Z Connector (□ mark) TrI Transformer (Indoor unit)

1,2 Current sensor Tr

O Transformer (Outdoor unit)

F Fuse Val Varistor

I Fan motor (Indoor unit) Vao VaristorFMO1,2 Fan motor (Outdoor unit) 20S 4-way valve solenoid

LM Louver motor 49F

I Internal thermostat for FM

LS Limit switch 49F

O1,2 Internal thermostat for FMo

DM Drain motor 52C Magnetic contactor for CM

FS Float switch X1~7 Auxiliary relay

PC Photo coupler X01~08 Auxiliary relay

1,2 Solenoid coil (for control) 63H

2 High pressure switch (for control)

SW Switch (ON/OFF) v Terminal (F)

2,3 Changeover switch ■ Connector

TB Terminal block (嘷 mark) LED-G Indication lamp (Green)

C Thermistor LED-R Indication lamp (Red)

ThI-A Thermistor

Color mark

Mark Color

BK Black

BL Blue

BR Brown

GR Gray

OR Orange

P Pink

RD Red

WH White

Mark Color

BK/RD Black/Red

BK/WH Black/White

BL/WH Blue/White

BR/WH Brown/White

OR/WH Orange/White

RD/WH Red/White

Y/GN Yellow/Green

237

FDTN-H

Models FDTN208HEN, 208HEP, 258HEN, 258HEP, 308HEN, 308HEP

FDT308HEN

Meaning of marks

Mark Parts name Mark Parts name

CC Capacitor for CM Th

Thermistor

Capacitor for FMI

ThI-A Thermistor

Capacitor for FMO

ThI-R Thermistor

CH Crankcase heater TrI Transformer

CM Compressor motor Val Varistor

CnA ~ W Connector (□ mark) 20S 4-way valve solenoid

DM Drain motor 23DH Thermostat (deicer)

F Fuse 49C Internal thermostat for CM

Fan motor (Indoor unit) 49F

I Internal thermostat for FM

FMO

Fan motor (Outdoor unit) 49F

O Internal thermostat for FMo

FS Float switch 52C Magnetic contactor for CM

LED1 Indication lamp (Green - Run) 52F

O Relay for FM

LED2 Indication lamp (

Yellow - Timer/Check

) 52X

O Relay for fan control

LM Louver motor X1~7 Auxiliary relay

LS Limit switch 63H

2 High pressure switch (for control)

NR Surge suppressor v Terminal (F)

PC Photo coupler ■ Connector

SW Switch (ON/OFF)

SW2, 3 Changeover switch

TB Terminal block (嘷 mark)

FM0

(49F0)

52C

FMI

(49FI)

Y / GN

OR OR

CnM

CnP

CnM

CnP

F(3 . 15A)

Y / GN

OR OR

WH Y / GN

CnJ

CnF

CFI

WHWH

RDWH

CnF1

CnJ

CnR

CnI

CnR

X4X7X5

Val

CnT

CnH

CnN

CnL

CnV

CnB2

CnB

CnA

CnN

CnH

ThI–A

ThI–R

BK BK

RDBKBR

CnW

CnW2

CnQ

TrI

Test

XR1

XR2

XR3

XR4

XR5

Option

Receiver amp

Wireless

remote

controller

LED1

LED2

( 3 )

SW2

SW3

ONONOFF

OFF

1 2 3 4

52C

Outdoor Unit

Indoor Unit

52C

52XO

CnD

52Xo

52Fo

20S

63H2

52Xo

BL BR

52F

23DH1

CnD

23DH

BRBR

Y / GN

(49C)

220/240V

12V

CnM

CnSCnB

Remote

controller

BKBKRDWHBK

RD WH BK

Thc

BK LS

CnS2

Only case of FDT series.

YYZZX

Printed wiring board

]

This diagram indicates the FDTN series. Section from

1 changes on

the FDT series.

[

Color mark

Mark Color

BK Black

BL Blue

BR Brown

GR Gray

OR Orange

RD Red

WH White

Y/GN Yellow/Green

Power source

FDTN208HEN, 258HEN, 308HEN, FDT308HEN

1 Phase 220/240V 50Hz

FDTN208HEP, 258HEP, 308HEP

1 Phase 220V 60Hz

238

FDTN-H

Models FDTN308HES

FDT308HES

FMO

(49FO)

52C

FMI

(49FI)

Y / GN

OR OR

CnM

F(3 . 15A)

Y / GN

O R O R

WH Y / GN

CnJ

CnF

CFI

WHWH

RDWH

CnF1

CnJ

CnR

CnI

CnR

Val

CnT

CnH

CnN

CnL

CnV

CnB2

CnB

CnA

CnN

CnH

ThI–A

ThI–R

BK BK

RDBKBR

CnW

CnW2

CnQ

TrI

Test

XR1

XR2

XR3

XR4

XR5

Option

Receiver amp

Wireless

remote

controller

LED1

LED2

( 3 )

SW2

SW3

ONONOFF

OFF

1 2 3 4

52C

Y / GN

CnM

(49C)

Outdoor Unit

Indoor Unit

CnP

52C

63H2

52Xo

52FO

52XO

CnD

52Xo

52Fo

20S

23DH1

CnD

23DH

BRBR

220/240V

12V

RD RD

CnSCnB

Remote

controller

BKBKRDWHBK

RD WH BK

Thc

BK LS

CnS2

Only case of FDT series.

YYZZX

Printed wiring board

]

This diagram indicates the FDTN series. Section from

1 changes on

the FDT series.

[

Power Source

3 Phase 380-415V 50Hz / 380V 60Hz

Color mark

Mark Color

BK Black

BL Blue

BR Brown

GR Gray

OR Orange

RD Red

WH White

Y/GN Yellow/Green

Meaning of marks

Mark Parts name Mark Parts name

I Capacitor for FM

ThC Thermistor

O Capacitor for FM

ThI-A Thermistor

CH Crankcase heater Th

I-R Thermistor

CM Compressor motor TrI Transformer

CnA ~ W Connector (□ mark) Val Varistor

DM Drain motor 20S 4-way valve solenoid

F Fuse 23DH Thermostat (deicer)

I Fan motor (Indoor unit) 49C Internal thermostat for CM

O Fan motor (Outdoor unit) 49F

I Internal thermostat for FM

FS Float switch 49F

O Internal thermostat for FMo

LED1 Indication lamp (Green - Run) 52C Magnetic contactor for CM

LED2 Indication lamp (

Yellow - Timer/Check

) 52FO Relay for FM

LM Louver motor 52X

O Relay for fan control

LS Limit switch X1~7 Auxiliary relay

NR Surge suppressor 63H

2 High pressure switch (for control)

PC Photo coupler v Terminal (F)

SW Switch (ON/OFF) ■ Connector

SW2, 3 Changeover switch

TB Terminal block (嘷 mark)

239

FDTN-H

Models FDTN408HES, 508HES

FDT408HES, 508HES

FMO1

(49FO1)

52C

FMI

(49FI)

Y / GN

OR OR

CnM

CFOI

CnM1

F(3 . 15A)

Y / GN

OR OR

WH Y / GN

CnJ

CnF

CFI

WHWH

RDWH

CnF1

CnJ

CnR

CnI

CnR

X2X

Val

CnT

CnH

CnN

CnL

CnV

CnB2

CnB

CnA

CnN

CnH

ThI–A

ThI–R

BK BK

RDBKBR

CnW

CnQ

TrI

Test

XR1

XR2

XR3

XR4

XR5

Option

Receiver amp

Wireless

remote

controller

LED1

LED2

( 3 )

SW2

SW3

ONONOFF

OFF

1 2 3 4

52C

Y / GN

CnM

(49C)

Outdoor Unit

Indoor Unit

CnP

52C

63H

52Xo

52FO

52XO

CnD

52Xo

52Fo

20S

23DH1

CnD

WHWH

CnD

23DH

BRBR

FMO2

(49FO2)

OR OR

CnM

CFO2

CnM

Y / GN

CnM

220/240V

12V

RDRD

BL BL

CnSCnB

Remote

controller

BKRDWH

RD WH BK

Thc

BK LS

CnS2

Only case of FDT series.

YYZ

Printed wiring board

Meaning of marks

Mark Parts name Mark Parts name

Capacitor for FMI

ThC

Thermistor

O1,2

Capacitor for FMO

ThI-A Thermistor

CH Crankcase heater Th

I-R Thermistor

CM Compressor motor TrI Transformer

CnA ~ W Connector (□ mark) Val Varistor

DM Drain motor 20S 4-way valve solenoid

F Fuse 23DH Thermostat (deicer)

Fan motor (Indoor unit) 49C Internal thermostat for CM

O1,2

Fan motor (Outdoor unit) 49F

Internal thermostat for FM

FS Float switch 49F

O1,2

Internal thermostat for FMo

LED1 Indication lamp (Green - Run) 52C Magnetic contactor for CM

LED2 Indication lamp (

Yellow - Timer/Check

) 52FO

Relay for FMO

LM Louver motor 52X

Relay for fan control

LS Limit switch X1~7 Auxiliary relay

NR Surge suppressor 63H

High pressure switch (for control)

PC Photo coupler v Terminal (F)

SW Switch (ON/OFF) ■ Connector

SW2, 3 Changeover switch

TB Terminal block (嘷 mark)

]

This diagram indicates the FDTN series. Section from

1 changes on

the FDT series.

[

Power Source

3 Phase 380-415V 50Hz / 380V 60Hz

Color mark

Mark Color

BK Black

BL Blue

BR Brown

GR Gray

OR Orange

RD Red

WH White

Y/GN Yellow/Green

240

FDTN-H

Model FDTN508HEM

(49F

)

52C

(49F

)

Y / GN

OR OR

CnM

F(3 . 15A)

Y / GN

OR OR

WH Y / GN

CnJ

CnF

WHWH

RDWH

CnF

CnJ

CnR

CnI

CnR

X2X

Val

CnT

CnH

CnN

CnL

CnV

CnB

CnA

CnN

CnH

ThI–A

ThI–R

BK BK

RDBKBR

CnW

CnQ

TrI

Test

XR1

XR2

XR3

XR4

XR5

Option

Receiver amp

Wireless

remote

controller

LED1

LED2

( 3 )

SW2

SW3

ONONOFF

OFF

1 2 3 4

Printed wiring board

52C

Y / GN

CnM

(49C)

Outdoor Unit

Indoor Unit

CnP

52C

63H

52Xo

52F

52X

CnD

52Xo

52Fo

20S

23DH

CnD

23DH

BRBR

(49F

)

OR OR

CnM

Y / GN

CnM

220/240V

12V

RDRD

BL BL

Power source

3 Phase 230V 50Hz / 220V 60Hz

Color mark

Mark Color

BK Black

BL Blue

BR Brown

GR Gray

OR Orange

RD Red

WH White

Y/GN Yellow/Green

Meaning of marks

Mark Parts name Mark Parts name

I Capacitor for FM

ThI-A Thermistor

O1,2 Capacitor for FM

ThI-R Thermistor

CH Crankcase heater TrI Transformer

CM Compressor motor Val Varistor

CnA ~ W Connector (□ mark) 20S 4-way valve solenoid

DM Drain motor 23DH Thermostat (deicer)

F Fuse 49C Internal thermostat for CM

I Fan motor (Indoor unit) 49F

I Internal thermostat for FM

O1,2 Fan motor (Outdoor unit) 49F

O1,2 Internal thermostat for FMo

FS Float switch 52C Magnetic contactor for CM

LED1 Indication lamp (Green - Run) 52F

O Relay for FM

LED2 Indication lamp (

Yellow - Timer/Check

) 52X

O Relay for fan control

LM Louver motor X1~7 Auxiliary relay

NR Surge suppressor 63H

2 High pressure switch (for control)

PC Photo coupler v Terminal (F)

SW Switch (ON/OFF) ■ Connector

SW2, 3 Changeover switch

TB Terminal block (嘷 mark)

241

FDTN-H

MODE TEMP ON/OFF

AIR FLOW FILTER

FAN SPEED

SET

TIMEACL

TIMER

AUTO COOL DRY FAN HEAT

FILTER

AM PM

OFF

FAN HI LO

6.4

OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

(1) Wireless remote controller

Models FDTN, FDEN, FDKN series

(a) Remote controller

OPERATION MODE indicator

Indicates selected operation mode

Fan speed

Indicates the selected fan speed

Timer ON time

Indicates the timer ON time. When the timer mode is “CONT” or “OFF”, the present time is indicated.

FAN SPEED button

Every time when the button is pressed, the mode is sequentially changed HI →LOW.

Timer mode button

Every time when the button is pressed, the mode is sequentially changed CONT → ON → OFF → PROGRAM.

Reset switch

Used to reset the microcomputer when something is wrong on the remote controller display.

• Above figure shows all indications for the purpose of explanation, but practically only the pertinent parts are indicated.

OPERATION MODE select button

This button, whenever pressed, changes the mode in the following order.

Auto swing

Indicates the selection of swing louver.

CAUTION

Cooling only air-conditioner has the display of “COOL”, “DRY” and “FAN” only.

Air flow direction button

Used to start or stop the swing louver.

Signal sender

Signals are sent to the air conditioner from here.

Filter reset indicator

The

FILTER

mark is indicated when the

FILTER RESET button is pressed.

Temperature indicator

Set temperature is indicated.

Timer OFF time

Indicated the timer OFF time. When the timer mode is “CONT” or “OFF”, there is no indication.

ON/OFF button

When the button is pressed, the air conditioner is started, and when the button is pressed once again, it is stopped. (When the air conditioner is stopped, the present time only is indicated. When the air conditioner is operating, details of setting are indicated.)

ROOM TEMP . button

Room temperature is set within the range of 18-30˚C by operating the ∆ ,

∇

or button.

Filter button

Used to reset (turn off) the filter sign. (Press for more than 1 second.) Press the button only after completing the filter cleaning.

TIME button

Used to set the present time and the timer operation time.

Set button

Used to switch from the hour to minute or vice versa when setting the present time or timer operation time.

Clock switch

Press this before setting the present time.

(b) Indoor unit indicators

Model FDTN series

Model FDKN series

➞

AUTO ➞ COOL ➞ DRY

HEAT FAN

Remote controller signal receiver.

RUN LAMP (GREEN)

Light up : Air conditioner is operating.

TIMER/CHECK (YELLOW)

Light up : Timer mode operating. Flashing : When some error occurs.

CAUTION

Cooling only air-conditioner changes the mode in the following order.

COOL➞DRY➞FAN

242

FDTN-H

Remote controller signal receiver

RUN CHECK

ON/OFF

Heavy Duty

CHECK LAMP (YELLOW)

When a malfunction occurs, the lamp flashing.

RUN LAMP (GREEN)

Illuminates during operation.

BACK UP SWITCH

When the remote controller is missing or defective, this switch can start and stop the air conditioner. Use the back up switch when the battery is exhausted, or when the remote controller is missing or defective. Usually operate the air conditioner with remote controller.

(2) Wired remote controller

Models FDT, FDR, FDU, FDUM, FDFL series

FDR,FDU, FDUM and FDFL series are not provided with AUTO SWING switch.

Panel shown below will appear if you open the cover. All contents of display on the LCD are indicated simultaneously for the purpose of explanation.

Pull the knob on the cover to this side to open it downward.

FILTER RESET

CHECK

FAN SPEED

AUTO SWING

TIMER

SET

MODE

TEMP TIME

PROGRAM TIMER

OFF

SET TEMP

°C

FAN

°C

CENTER REMOTE

AUTODRYCOOLFANHEAT HEAT

Filter reset switch

Use this switch to reset (erase) the filter sign display. (Press the switch after cleaning the air filter.)

Filter sign

When this sign is indicated, clean the filter.

Remote display

This is displayed when the unit is controlled with an individual controller during normal operation. (Also displayed when the air conditioner is stopped.)

Inspection switch

Use this switch when servicing the unit.

Operation mode display

Displays the operation mode that has been selected. (Cooling only air-conditioner has the display of "COOL" ,"DRY" and "FAN" only.)

Fan speed display

Displays the fan speed that has been set.

Operation/ Inspection indicator lamp

During operation: Green lamp flashes. In case of error: Red lamp flashes.

On/Off switch

Use this switch to start or stop the air conditioner.First push on the switch starts the unit and second push stops it. (The switch can be operated without opening the cover.)

Fan speed switch

Use this switch to set a fan speed.

Mode switch

Use this switch to select operation modes.

Cover

Heating preparation display

Timer switch

Use this switch when selecting contents of timer operation.

Set switch

Use this switch to set a time for the timer.

Temperature/ Time setting switch

Use this switch to set the room temperature or time on the timer.

Auto swing switch

Use this switch to operate or stop the swing louver.

Auto swing display

Indicates the swing louver condition.

Setting temperature display

Displays the temperature that has been set.

Return air temperature display

Displays the return air temperature.

Indicated value may be different from actual reading on a thermometer or other instrument but this is not necessarily an error.

Note

Outdoor No.

Central display

This is displayed when the unit is controlled with the optional central console.

Timer operation display

Contents of timer operation are displayed. (Also displayed when the air conditioner is stopped.)

FILTER

HOT

KEEP

Model FDEN series

243

FDTN-H

(3) Control switch

Model FDF series

The liquid crystal display area indicates the full contents of display for explanation.

TIMERSET MODE

AUTO SWING

FAN SPEED

CHECK

FILTERRESET

PROGRAMTIMER

OFF

SET TEMP

°C

FAN

°C

Outdoor No.

CENTER REMOTE

FILTER

AUTO DRY COOL FAN HOT KEEP

Remote display

This display is indicated when the unit is controlled by the normal individual operation control. (The indication remains intact while the air-conditioner is stopped, too.

Filter sign

When this display is indicated, clean the air filter.

Center display

¡ This display is indicated when the unit is

controlled by the center console that is sold separately.

¡ Indicator lamp lights when the switch

operation is fixed.

Timer operation display

This display indicates the content of timer operation. (The indication remains intact while the air-conditioner is stopped, too.)

The swing louver control

It is displayed as shown during swing louver control.

Operation mode display

The selected operation mode is indicated.

Prepararion of heating (HOT KEEP) display

FAN SPEED display

The fan speed set is displayed.

Setting temperature display

This display indicates the setting temperature.

Mode switch

This switch makes selection of the operation mode.

ON/OFF switch

This switch performs run/stop of the air-conditioner. Press switch once to “run” and press it again to “stop”.

Operation/check indication lamp

During normal operation: Green lamp is lit. When an error occurred: Red lamp flickers.

Auto swing switch

Activates and stops the swing louver.

FAN SPEED switch

The fan speed is switched.

Temperature setting/time setting switch

This switch is used to set the room temperature and the timer time.

Check switch

This switch is used for service.

Filter reset switch

This switch resets (erases) the filter sign display. (Press this switch after the cleaning of filter has been finished.)

Timer switch

This switch is used to select the content of timer operation.

Setting switch

This switch is used to set the timer time.

Return air temperature display

The temperature of return air is indicated.

NOTE

The indicated temperature value may be different from the indication of thermometer, etc. but this is not abnormal.

244

FDTN-H

(4) Outline of microcomputer control function

(a) Operation control function by the indoor controller

1) Automatic operation (Only heat pump type)

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 dispenser.

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

room temperature is controlled based on the setting of room temperature (DIFF:±}1 deg)

(2) If the temperature of indoor heat exchanger rises be-

yond 63˚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.

T emperature difference between thermostat set temp. and return air temp. (Detected by ThI-A)

Note(1)

:ON

× :OFF

/ × :According to control other than temperature control.

Thermostat

Cooling Fan Heating Dry

Control part Compressor

××

4-way valve × ××

× ××

Outdoor fan

××

Indoor fan

/ ×

Louver motor

/ ×

Condensate motor

× (2min. ON) × (2min. ON)

× (2min. ON)

Electric heater

××

/ × × ×

Thermostat

OFF

HOT START

Defrost

ThermostatONThermostat

OFF

ThermostatONThermostat

OFF

3) Control parts operation during cooling and heating

2) Room temperature control (Differential of thermostat)

Temperature difference between thermostat set temp. and return air temp. (Detected by ThI-A)

Function

Heating operation

OFF (52C)

+1°C

-1°C Set temp.by thermostat

Cooling operation

OFF (52C)

+1°C

-1°C Set temp.by thermostat

ON (52C)

Heating operation

Cooling operation

Setting room temp.

Room temp. (detected at Th

1-A

) [deg]

Ready for heating

Suspended heating operation

Indoor heat exchanger temperature (˚C)

–

245

FDTN-H

Notes (1)

Operation block A

B : Normal cooling operation for 16 minutes after operation is started.

Operation stops by thermostat when the set temperature is reached. After 16 minutes, normal thermal drying operation starts.

Operation block

C D : Operation as above is performed for 8 minutes.

After 8 minutes, normal thermal drying operation starts.

(2) In normal operation, the temperature is checked at 8 minute intervals after normal thermal drying

operation is started, to determine which operation block is to the selected.

Operation block

A thermal drying is carried out if the thermostat set temperature is constant.

4) Dehumidifying operation (“THERMAL DRY”)

The compressor, the indoor fan motor and the outdoor fan motor are operated intermittently under thermistor (ThI-A) control according to the appropriate operation block, to provide cooling operation for the dehumidifying.

Operation block

D C B A

Set temp. by thermostat

Pattern of operation

Operation block

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

(16 minutes)

• Cooling operation (Thermostat ON)

• Indoor fan operating with the setting air flow.

• When the thermostat is turned off, the indoor fan operates for 30 seconds with the Lo operation in the wind blowing mode and then stops.

(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

5) Hot spurt (Only heat pump type)

In the hot spurt mode, the control is conducted at the level 2 ˚C higher than the setting temperature at the start of heating operation. The hot spurt is canceled either after the initial thermostat OFF, when the indoor heat exchanger temperature reaches 61˚C or 60 minutes after the start of the mode.

Room temperature (deg)

CM, FMO: ON FMI : ON

Normal thermal dry operation (after completion of thermal drying)

Low

-2˚C

+3˚C

High

246

FDTN-H

6) FM control with the heating thermostat turned off (For cold draft prevention) (Only heat pump type)

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 SW3-4 on the indoor PCB is turned of f, 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.

Hot start (Cold draft prevention during heating) (Only heat pump type)

1) If the indoor heat exchanger temperature is lower than 30˚C when the heating operation has started, the following indoor blower control is performed. (1) In case of the thermostat off condition: Lo operation (2) In case of the thermostat on condition : Stop (3) If the indoor heat exchanger temperature exceeds 30˚C or 7 minutes after the beginning of hot start, the hot start

terminates and it returns to the setting airflow of the blower.

2) If the indoor heat exchanger temperature is lower than 30˚C when the unit is heating under the thermo-ON condition, the indoor fan operates in the Lo mode. As the temperature rises higher than 30 ˚C or 7 minutes after the beginning of hot start, the hot start terminates and it returns to the setting air flow.

Indoor fan control during defrost operation (Only heat pump type)

1) The indoor fan operation is changed from the setting airflow to the Lo operation 40 seconds before the start of defrost operation (when the defrost thermostat is turned ON) and stops if the indoor heat exchanger temperature drops below 20˚C.

2) After the stop as described in 1)-above, the control will be conducted as illustrated below depending on the indoor heat exchanger temperature.

3) If the indoor heat exchanger temperature rises beyond 30˚C of 7 minutes after the end of defrosting, the indoor fan control related to the defrosting is completed.

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

control.

Indoor heat exchanger temperature(˚C)

(Setting air flow)

Stop

247

FDTN-H

9) Condensate pump motor (DM) control (Only FDTN, FDT, FDR, FDUM models)

During the cooling or Dehumidifying operation, the condensate pump motor (DM) is synchronized with the start of compressor operation. If the operation is switched from the operation stop, error stop, thermostat stop and the cooling of defrosting operation to the fan or heating operation, the drain motor continues to operate for 2 minutes after the switching. Overflow detection by means of the float switch is always on regardless of the operation mode. If an overflow occurs (or the float switch is not connected or the wire is broken), the operation is interrupted as the error stop and the drain motor is operated until the state of float switch is normalized.

10)

Defrost control (FDC208, 258 or 6 series only)

Defrost operation is precisely controlled with the defrost thermostat (23DH

1, 2) and a timer.

a) Defrost starting conditions

Defrost operation will start only when all of following conditions are met.

1) When the compressor operation time accumulated after the start of heating operation exceeds 30 minutes.

2) When the compressor operation time accumulated after the end of defrost operation exceeds 45 minutes.

3) When the defrost thermostat (23DH1) is turned ON (-6˚C)

b) Defrost terminating condition

If the defrost thermostat (23DH2) is turned OFF (12˚C) or 12 minutes after the start of defrost operation, the defrost operation is canceled and it returns to the heating operation.

11)

4-way valve control (1 phase models only and heat pump only) (FDC208, 258 or 6 series only)

In order to maintain the pressure balance after the stop of compressor during cooling, dehumidifying and heating operation. the 4way valve is controlled repeatedly as illustrated below.

12)

Frost prevention during cooling (For indoor heat exchanger)

In order to prevent the frosting during cooling operation, the temperature of indoor unit heat exchanger (detected by Th

I-R) is

checked 9 min, after the compressor operation start and the unit operation. This cycle is not operated for 9 min. after the resetting of this frost prevention mechanism.

Compressor (During cooling, heating)

Indoor heat exchanger (ThI-R)

ON OFF

120 sec.

50 sec.

180 sec. or over

OFF (52C)

Cooling operation

2.5˚C

10˚C

4-way valve

(During cooling)

(During heating)

248

FDTN-H

13) Compressor inching prevention control (FDC208, 258 or 6 series only)

a) Compressor 3 minutes delay control

The compressor will remain in stop state for three minutes. When the compressor is stopped by thermostat, ON/OFF switch, and/or by occurrence of trouble. When the power source is turned ON, the three-minute delay timer is cancelled.

b) Compressor 3 minutes forced operation control

Compressor cannot be stopped for 3 minutes after it started. However, it will be stopped immediately when the thermostat is turned off due to the operation stop initiated by the ON/OFF switch or the change of operation mode.

Note (1) Both the error control and the protective control take priority over this control.

14)

Overload protection during heating (Only heat pump type)

If an overload condition has been detected by the indoor heat exchanger temperature and it has continued for more than 2 seconds during heating, the compressor is stopped. The compressor is started after a delay of 3 minutes and, if the overload condition is detected again whithin 60 minutes after the initial detection, the compressor is stopped with the error stop.

15) Automatic restart control

If there is interruption of power while the unit is operating, the unit operates after power restoration under the same condition as prior to the power interruption. However the compressor will only be able to start three minutes after the power restoration. Furthermore, if the timer was operating prior to the power interruption, the unit remains stopped even after the restoration of service.

Note (1) Becomes invalid if the dip switch SW3-1 on the indoor PC board is at OFF (SW3-1 is set at ON when unit is shipped

from the factory).

16)

Thermistor disconnection detection control

a) Detection of indoor return air thermistor disconnection

● If there is detection of a disconnection on the return air thermistor in 10 seconds after turning the power ON, the compressor

is stopped. If there is a second disconnection on the return air thermistor detected within 60 minutes, there is emergency stop.

Note (1) If the first disconnection on the return air thermistor is detected for a period of 6 continuous minutes, there is emergency

stop. If there is no detection of a second disconnection on the return air thermistor whithin 60 minutes, the first detection becomes invalid.

b) Detection of heat exchanger thermistor disconnection

● If a disconnection is detected on the heat exchanger thermistor in 20 seconds after the compressor has been operating for

2 minutes, the compressor is stopped. If a second disconnection on the heat exchanger thermistor line is detected within 60 minutes, there is emergency stop.

Note (1) If the first disconnection on the heat exchanger thermistor is detected for a period 6 continuous minutes, there is emergency

stop. If there is no detection of second disconnection on the heat exchanger thermistor within 60 minutes, the first detection becomes invalid.

Indoor heat exchanger

temperature(˚C)

Heating operation

249

FDTN-H

17) Drain detection (Only FDTN, FDT, FDR, FDUM models)

a) If there is detection of a drain abnormality during cooling operation, the drain pump goes ON for 5 minutes and the compres-

sor which had been running comes to a stop. Overflow detection is carried out at all times with the float switch regardless of operational mode. If an overflow is generated (or if the float switch is not yet connected or has been disconnected). there is emergency stop (while the Check lamp (yellow) blinks 4 times) the drain motor operates until reset of the float switch.

b) If a drain abnormality is detected during cooling operation, there is emergency stop (while the Check lamp (yellow) blinks 4

times) to stop the compressor, and the drain pump is operated with the drain motor until reset of the float switch.

c) If a drain abnormality is detected during a stop state or fan operation, there is forced operation of the drain pump for 5

minutes. After 5 minutes have elapsed, the drain motor stops if the float switch is reset. Otherwise, there is emergency stop (wile the Check lamp (yellow) blinks 4 times) and the drain motor operates until the float switch is reset.

d) If the float switch is not connected or if there is a disconnection, there is emergency stop.

18)

Low voltage guard control

If the power source voltage remains at a value of 80% of rating or less for 3 continuous minutes during operation of the compressor,

the compressor stops (52C OFF). Furthermore, if the power source voltage remains at a figure of 15% of rating or greater after 3 minutes have elapsed since stopping the compressor, there is restarting of the compressor (52C ON). Moreover , during stoppage of the compressor, the Run lamp (green) blinks 2 times. Note (1) When starting the compressor for the first time after turning the operational switch ON, there is starting regardless

of the power source voltage. Furthermore, if dip switch SW 3-2 on the internal substrate is OFF, this becomes invalid. (Switch SW 3-2 is set to ON upon shipment from the factory).

19) Refrigerant shortage error

When 52C is ON when operating in cooling (including automatic cooling), if heat exchanger sensor temperature for the indoor unit (Th1 -R) does not drop to 25 °C or less for 40 minutes 5 minutes or more after the start of operation, an abnormal stop due to insufficient refrigerant is performed.

20)

External control (remote display)/control of input signal

● External control (remote display) output

Following output connectors (CNT) are provided on the control circuit board 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.

● Control of input signal

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

control unit.)

Control of input signal (switch input, timer input) connectors (CNT) are provided on the control circuit board of the indoor unit. However, when the operation of air conditioner is under the Center Mode, the remote control by CnT is invalid.

250

FDTN-H

OFF OFF OFF

OFF OFF

ON ON ON

ON ON

Remote controller operation OFF

(Last operation has priority.)

Remote controller operation ON

OFF OFF OFF

ON ON

OFF OFF OFF

Remote controller operation OFF

(Last operation has priority.)

Remote controller operation ON

● At shipping from factory (SW5-3 [J3] 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

● When SW5-3 (J3) 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

Unit A

CnT input

Unit A

21) Auto Swing Control (Excepted FDR, FDU, FDUM, FDF models)

● Have a louver motor to move the louvers up and down for the so called “auto swing” function.

● The louver auto swing starts when the AUTO SWING key is pressed once and stops when the AUTO SWING key is pressed

again. The louver position is displayed on the LCD on the remote controller. During auto swing, the position displayed on the LCD changes, but the positions of the louvers and the display are not coordinated. (The louvers swing 3 - 4 times per minute but the display changes once per second.)

● Stopping the louvers

When the AUTO SWING key is pressed to stop the louver movement, the LCD louver-position display stops and the louvers stop when they come to the position displayed on the LCD. There are four louver stop position on the LCD. (When jumper wire J7 (SW

4-4) on the indoor unit printed circuit board is cut, the louvers stop immediately at the AUTO SWING key is pressed to

stop them and the LCD display changes to show this position. (Excepted FDKN model)

● Movement of louver when the power supply to the controller controlling 4 positions of the louver is switched on.

When power supply is switched on, the louver will automatically swing about 2 times (without operating remote controller). This is an action for the microcomputer to confirm the louver position in order to input the cycle of the louver motor (LM) to the microcomputer with the limit switch (LS) pushing the louver motor (LM). If the LS action is not input to the microcomputer, the louver will stop within 1 minute after the power supply is switched on and will not move from then on.

251

FDTN-H

● Keeping the louvers horizontal during heating (Only heat pump type)

While HOT KEEP is displayed (during hot start operation or when the thermostat has turned off during heating operation), the louvers stay in the horizontal position to prevent cold drafts, independent of the setting of the AUT O SWING key (auto swing or stop). The louver position display of LCD displays continuously the original position before this control operation. When the HOT KEEP display goes out, both the louvers and the LCD display return to their previous position. (However, after the power supply to the unit is switched on, the louvers swing two times as a check of the power source frequency, regardless of the settings of the ON / OFF or AUTO SWING keys).

22)

Auxiliary Electric Heater (Only FDF model)

(1) This control is enabled when an auxiliary heater is used. As shown in the drawing below, since the ON/OFF control is

performed by the temperature of the thermostat and the air heat exchanger (both of them conduct electricity during electrical conditions), control with high responsiveness to the load is performed. Note that there is no conductivity when the fan for the indoor unit is stopped (including hot start), when the compressor is stopped and when the defroster is operating.

(2) When the heater changes from conducting to not conducting, even when the indoor fan (FMI) has been stopped (operation

stop by the operating switch or abnormal stop) the indoor fan will operate at low speed for 40 seconds before shutting off to remove surplus heat from the heater.

Conducting

Not conducting

Room temperature setting

Room temperature (Th

I-A

detected) [deg]

–2–4

Conducting

Not conducting

Indoor heat exchanger temperature (°C)

5854

252

FDTN-H

R18

RED

IC3

IC4

IC5

R7 R28

IC1

R12

R11

R13

TYPE

SW1

REMOTE

THERMO

SW2

POWEP OFF

GUARAMTY

SW3

(SW1 ~ SW4)

DIP switched

TEMP DISP.

FAN SPEED

TIMER FUNC.

SWING

DISP.

J1 J2 J3

Jumper wires (J1 ~ J4)

BLACK WHITE

• Function of DIP switched Switch Function

Cooling only type Heat pump type Remote control sensor - Enabled Remote control sensor - Disabled Power outage compensation - ON Power outage compensation - OFF

OFF

SW2

SW3

• Function of Jumper wires Switch Function

Inlet temperature display - Enabled Inlet temperature display - Disabled Fan display - 3 speeds Fan display - 2 speeds Timer function - Enabled (Normal) Timer function - Disabled Auto swing display - ON Auto swing display - OFF

Wich

None

(1)

Wich

None

(1)

Wich

None

(1)

Wich

None

(1)

Note (1) 'None' means that jumper wire is not provided

on the PCB or the connection ic cut.

(b) Operation control function by the wired remote controller

(i) The following is the sequence of operation for the remote controller operation mode switch.

(ii)

CPU reset

This functions when the " inspection " and " filter reset switch " on the remote controller are pushed simultaneously. It operates in the same manner as the power reset.

(iii)

Power outage compensation function.

● This is enabled by setting dip switch SW3 on the remote control circuit board to ON.

● It records the normally used remote control modes. Once power has been restored, it restarts operation by using the

contents of the memory. Note that the stop positions for auto swing and the timer mode are cancelled.

Parts layout on the remote controller PCB

DRY COOL FAN HEA AUT

253

FDTN-H

Tho-A (°C)

Tho-R (°C)

C Zone D Zone E Zone

F Zone

UHi UHi UHi

A Zone

UHi

Hi Hi

B Zone

UHi

Hi Lo

Description of control for fan for outdoor unit

Control for outdoor unit fan a) Cooling Operation

The speed of the fan for the outdoor unit is controlled by the temperature of the heat exchanger (Tho-R detection) and the outdoor air temperature (Tho-A).

E Zone

Heat exchanger temperature (°C)

6357

C Zone

D Zone

B Zone

Outdoor air temperature (°C)

3331

F Zone

A Zone

Tho-A (°C)

Tho-R (°C)

C Zone D Zone

E Zone

A Zone

UHi

B Zone

UHi UHi

Description of control for fan for outdoor unit

B Zone

Outdoor air temperature (°C)

1917

E Zone

A Zone

-3

Heat exchanger temperature (°C)

C Zone

D Zone

Outdoor air temperature (°C)

Outdoor fan

operates

at Hi speed

Outdoor fan stopped

b) Heating Operation

1 Stop control for outdoor fan

When the high pressure switch (63H2) operates, the fan for the outdoor unit is stopped to control the high pressure switch. 63H

2 settings

2.5 OFF/2.06 ON (MPa) [25.5 OFF/21 ON (kgf/cm

G)]

2 Tap control for outdoor fan

When the high pressure switch (63H2) is closed, the outdoor fan is controlled by the detected heat of the outdoor heat exchanger thermistor (Tho-R) and the detected heat of the outdoor air temperature thermistor (Tho-A).

2) Control of fan for outdoor unit for de-icing

If DIP switch SW5-2 on the printed circuit board for the outdoor unit is set to on, the fan on the outdoor unit which has been stopped will operate for 10 seconds at Hi speed every 10 minutes when the outdoor air temperature is 3 °C or less.

Note (1) When the fan for the outdoor unit is started when the outdoor air temperature is more than 12 °C, it will operate at

high speed for 3 seconds and then switch to low speed. After operating a low speed for 4 minutes, it will be transferred to controlled speed.

254

FDTN-H

-20

-15

-10

-5

-15 -10 -5

Outdoor air temperature (°C) [Th0-A]

Heat exchanger temperature

(°C)

[Th

-R]

0510

Zone for initiate temp. of defrost

Initiation temp. of defrosting

3) 4-way valve control (1 phase models only)

In order to maintain the pressure balance after the stop of compressor during cooling, dehumidifying and heating operation. the 4-way valve is controlled repeatedly as illustrated below.

4-way valve

(During cooling)

(During heating)

Compressor (During cooling, heating)

ON OFF

120 sec.

50 sec.

171 sec. or over

Note (1) If DIP switch SW5-1 on the printed circuit board for the outdoor unit is set to on, defrost operation will begin when temperature of the heat exchanger

for the outdoor unit reaches -7 °C.

a) Defrost Operation

Switching of the control of the 4-way selector valve during defrost operation can be performed by enabling/disabling the jumper wire (J17) on the printed circuit board for the outdoor unit. (i) J17 None (4-way selector valve ON during heater operation)

Defrost operation is performed with the compressor on, the fan for the outdoor unit off and the 4-way selector valve off.

(ii) J17 With (4-way selector valve OFF during heater operation)

Defrost operation is performed with the compressor on, the fan for the outdoor unit off and the 4-way selector valve on.

b) Defrost finished

(i) Once defrost operation has started, it will finish after the cumulative operating time of the compressor has reached

12 minutes (factory setting: SW5-1 OFF).

Note (1) This time will become 14 minutes if the DIP switch (SW5-1) on the printed circuit board on the outdoor unit is set to on.

(ii) Switching of the defrost recovery time can be performed by enabling/disabling the jumper wire (J18) on the printed

circuit board for the outdoor unit. J18 (SW6-2) With: 14 °C, J18 (SW6-2) None: 18 °C

Defrost control

Defrost operation will start when the temperature of the heat exchanger for the outdoor unit (Tho-R detection) and the outdoor air temperature (Tho-A detection) enter the start of defrost range shown in the figure below.

Initiation temp. of defrosting (Detected by Tho-R, Tho-A)

SV -close

SV -open

Discharge gas temp.

115°C118°C

4) Discharge temperature control during cooling/heating

As the discharge gas temperature (detected with ThO-D) rises during cooling/heating operation, the capillary bypass and the liquid bypass solenoid valve (SV1) are opened so that the abnormal rise of discharge gas temperature is prevented.

255

FDTN-H

(ii) If 60 minutes passes and the detected temperature after the first to the fourth stoppage is not less than 90 °C, an

abnormal stop of the unit is performed. Note (1) Once an abnormal discharge temperature has occurred, restarting cannot be performed for 45 minutes.

[Detection temperature less than 3 °C]. (In failure mode, resetting cannot be performed by remote control.) Operation is possible after 45 minutes. (Cleared by resetting power source.)

d) Cooling overload protection

State of overload during cooling operation is detected (with Tho-R) based on the temperature of outdoor heat exchanger and the unit operation is stopped / Immediate reset after repair

60°C

Outdoor heat exchanger temp.

70°C

Error stop

Operable

e) Thermistor (Discharge Piping, Heat Exchanger and Outdoor Air Sensor) disconnected wire

(i) If there is a disconnected wire or if there is a big difference in performance characteristics, an abnormal stop of the

unit is performed. e Restore after repairing.

f) Compressor inching prevention control

(i) Compressor 3 minutes delay control

The compressor will remain in stop state for three minutes. When the compressor is stopped by thermostat, ON/ OFF switch, and/or by occurrence of trouble. When the power source is turned ON, the three-minute delay timer is cancelled.

(ii) Compressor 3 minutes forced operation control

Compressor protecting function (Microcomputer and phase protection relay) a) Overcurrent control

(i)

When a 52C secondary L1-phase continues for 0.5 seconds and when it is more than the set value (detection at current sensor CT), the compressor is stopped. The compressor is restarted after a 3-minute delay if the detection current is less than 1.5 to 2A. If this condition is re-detected 5 times within 60 minutes of the first occurrence, an abnormal stop of the unit is performed.

(ii) If 60 minutes passes and the detected current after the first to the fourth stoppage is not less than 1.5~2A, an

abnormal stop of the unit is performed.

b) Open-phase Protection

When a 52C secondary detection current continues for 4 seconds when the compressor is on and when it is less than

1.5 to 2 A, it is determined to be a open-phase of the 52C secondary N-phase, and the compressor is stopped. The compressor is restarted after a 3-minute delay and if this condition is re-detected within 60 minutes of the first occurrence, an abnormal stop of the unit is performed.

c) Detection of Abnormal Discharge Temperature

(i) When an abnormally high temperature is detected at the discharge pipe of the compressor (Tho-D detection), the

compressor is stopped. The compressor is restarted after a 3-minute delay and if this condition is re-detected 5 times within 60 minutes of the first occurrence, an abnormal stop of the unit is performed.

Discharge pipe temp. (°C)

135

Error stop

Operable

256

FDTN-H

6.5 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

• This system should be applied to places of office, restaurant, residence and the like. Application to inferior environment such as engineering shop could cause equipment malfunction.

• Please entrust installation to either the company which sold you the equipment or to a professional contractor. Defects from improper installations can be the cause of water leakage, electric shocks and fires.

• Execute the installation accurately, based on following the installation manual. Again, improper installations can result in water leakage, electric shocks and fires.

•

When a large air-conditioning system is installed to a small room, it is necessary to have a prior planned countermeasure for the rare case of a refrigerant leakage, to prevent the exceeding of threshold concentration. In regards to preparing this countermeasure, consult with the company from which you perchased the equipment, and make the installation accordingly. In the rare event that a refrigerant leakage and exceeding of threshold concentration does occur, there is the danger of a resultant oxygen deficiency accident.

• For installation, confirm that the installation site can sufficiently support heavy weight. When strength is insufficient, injury can result from a falling of the unit.

•

Execute the prescribed installation construction to prepare for earthquakes and the strong winds of typhoons and hurricanes, etc. Improper installations can result in accidents due to a violent falling over of the unit.

• For electrical work, please see that a licensed electrician executes the work while following the safety standards related to electrical equipment, and local regulations as well as the installation instructions, and that only exclusive use circuits are used. Insufficient power source circuit capacity and defective installment execution can be the cause of electric shocks and fires.

• Accurately connect wiring using the proper cable, and insure that the external force of the cable is not conducted to the terminal connection part, through properly securing it. Improper connection or securing can result in heat generation or fire.

• Take care that wiring does not rise upward, and accurately install the lid/service panel. Its improper installation can also result in heat generation or fire.

• When setting up or moving the location of the air conditioner, do not mix air etc. or anything other than the designated refrigerant (R22) within the refrigeration cycle. Rupture and injury caused by abnormal high pressure can result from such mixing.

• Always use accessory parts and authorized parts for installation construction. Using parts not authorized by this company can result in water leakage, electric shock, fire and refrigerant leakage.

• Execute proper grounding. Do not connect the ground wire to a gas pipe, water pipe, lightning rod or a telephone ground wire. Improper placement of ground wires can result in electric shock.

• The installation of an earth leakage breaker is necessary depending on the established location of the unit. Not installing an earth leakage breaker may result in electric shock.

• Do not install the unit where there is a concern about leakage of combustible gas. The rare event of leaked gas collecting around the unit could result in an outbreak of fire.

• For the drain pipe, follow the installation manual to insure that it allows proper drainage and thermally insulate it to prevent condensation. Inadequate plumbing can result in water leakage and water damage to interior items.

CAUTION

257

FDTN-H

161

141

21526

336

295

264

304300

570

359

(1) Selection of installation location

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

below and perfect draining can be assured.

(b) Places where perfect drainage can be prepared and sufficient drainage gradient

is available.

(c) Places free from air distrubances to the air inlet and outlet of the indoor unit. (d) laces 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.)

(e) Do not place where the unit is exposed to oil splashes or steam (e.g. kitchens

and machine plants). (Installation and use at such places will causes the performance drop, corrosion in the heat exchanger and damage in molded synthetic resin parts.)

(f) Do not place where corrosive gas (such as sulfurous acid gas) or inflammable

gas (thinner, gasoline, etc.) is generated or remains. Installation and use at such places will cause corrosion in the heat exchanger and damage in molded synthetic resin parts.

(g) Do not place adjacent to equipment generating electromagnetic waves or high-frequency waves such as in hospitals,

Generated noise may cause malfunctioning of the controller.

(2) Preparation for installation

(a) Ceiling hole size and Position of suspension bolts.

1) The pattern sheet may shrink or expand as humidity changes, so check the actual size before use.

2) The size of ceiling opening can be adjusted within the range shown below. Bring the unit body to the ceiling opening right in the center so as not to be set aside and so that space between a ceiling opening end and the outside of the unit body becomes equal to that on the opposite side.

3) The size of the pattern sheet equals to the maximum size of the square ceiling opening.

(b) Location of Pipes

For the location of pipe, see the exterior dimension.

6.5.1 Installation of indoor unit

¡Installation space

(mm)

1,000 and over

Obstacle

Gas refrigerant piping

Liquid refrigerant piping

Drain piping connecting hole

Power intake hole

Hang bolt

Outside air intake hole

Supply air branch duct connecting hole

Model a b 258, 308 210 260 408, 508 270 320

Unit: mm

Drain hose (accessory) Attach on site.

45 and over

Hanger

Ceiling opening dimension: 860 to 890 square

Hang bolt pitch: 780

Hang bolt pitch: 675

FDT(N) 258~508

FDT(N) 208

Drain hose (accessory) Attach on site.

Hanger

Ceiling opening dimension: 740 square

Hang bolt pitch: 430

Hang bolt pitch: 680

Control box

□700

49 and over

Control box

Type Space above ceiling

FDT(N) 208 Over 225 mm FDT(N) 258, 308 Over 270 mm FDT(N) 408, 508 Over 330 mm

NOTICE

All Wiring of this installation must comply with NATIONAL, STATE AND LOCAL REGULA TIONS. These instructions

do not cover all variations for every kind of installation circumstance. Should further information be desired or should particular problems occur, the matter should be referred to Mitsubishi Heavy Industries, Ltd. through your local distributor.

WARNING

BE SURE TO READ THESE INSTRUCTIONS CAREFULLY BEFORE BEGINNING INSTALLATION. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD CAUSE SERIOUS INJURY OR DEATH, EQUIPMENT MALFUNCTION AND/OR PROPERTY DAMAGE.

258

FDTN-H

(3) Hanging

¡ Arrange four sets of a hang bolt (M10 or M8) , a nut for it, a

plain washer and a spring washer on site.

When there is the ceiling

1. Make an 860 to 890 mm-square cutout on the ceiling. Refer to the outside dimensions of packing cardboard container. s Align the center of ceiling cutout and the center of unit.

2. Decide the hang bolt position 675×780 in the case of FDT(N) 258 ~ 508, and 430×680 in the case of FDT(N) 208.

3. Use four hang bolts and fix them so that each bolt can resist the pull out load of 50kgf.

4. Decide the length of hang bolt to approx. 70mm above the ceiling surface.

5. After hanging in the unit, fix the attached level gauge and secure the height of unit.

6. Use a transparent hose filled with water to check the levelness of unit. (The maximum allowable height difference between both ends of unit is 3mm.)

Request

¡ For the hang bolt whose length exceeds 1.3m, use the M10 size

hang bolt and moreover combine a diagonal member to the hang bolt for reinforcement.

(4) Drain Piping

(a) Drain piping should always be in a downhili grade (1/50~1/100) and avoid riding across and elevation or making traps.

(b) When connecting the drain pipe to unit, pay sufficient 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.

(I.D.1") which can be purchased locally. When connecting, insert a PVC pipe end securely into the drain socket before tightening securely using the attached drain hose and clamp. Adhesive must not be used connection of the drain socket and drain hose (accessory).

(d) When consturcting drain piping for several units, position the

common pipe about 100 mm below the drain outlet of each unit as shown in the sketch. Use VP-30 (11/4") or thicker pipe for this purpose.

(e) Be sure to provide heat insulation to hard PVC pipes of indoor

placement. (f) Do not ever provide an air vent. (g) The height of the drain head can be elevated up to a point 700

mm ablve the ceiling and, when an obstacle exists in the ceil-

ing 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 higher than 500 mm, the back-flow

quantity of drain at the event of interruption of the operation

gets too much and it may cause overflow at the drain pan. There-

fore, make the height of the drain pipe within the distance given

in the sketeh below. (h) Avoid positioning the drain piping outlet at a place where gen-

eration of odor may be stimulated. Do not lead the drain pip-

ing direct into a sewer from where sulfur gas may generate. (i) The purpose of drain hose is to absorb minute discrepancy of

the unit or the drain piping occurred when they are installed.

Therefore, when it is bent intentionally or used under expanded

condition, it may be damaged and result in water leakage.

Refrigerant piping

Drain

Level gauge

Hang bolt

Nut

Washer

Main body

Spring washer

Indoor unit

Hose

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

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

Ceiling member

Level gauge (insulation)

Supply air grill

Drain socket

Stage difference part

Drain hose

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

VP25 joint (field purchased)

Drain hose (accessory)

Drain socket

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

Adhesion

Pipe cover [for insuation] (field purchased)

VP25 (field purchased)

Clamp (accessory)

Secure the elevation as high as possible (approx. 100 mm)

A downhill grade of 1/100 or more

VP30

295~325 mm 100 mm or less

Drain hose

VP25 joint (field purchased)

700 mm or less

¡Good piping

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

¡Improper piping

A FDT(N) 258~508 40~45 FDT(N) 208 45~47

Main unit

259

FDTN-H

Drainage Test

1 Conduct a drainage test after completion of the electrical work. 2 During the trial, make sure that drain flows properly through the piping and that no water leaks from connections. 3 In case of a new building, conduct the test before it is furnished with the ceiling. 4 Be sure to conduct this test even when the unit is installed in the heating season.

Procedures

1 Supply about 1000 cc of water to the unit through the air outlet by using a feed water pump.

If the electrical work has not been completed, connect a convex joint in the drain pipe connection to provide a water inlet. Then, check if water leaks from the piping system and that drain flows through the drain pipe normally.

2 Check at the exhaust port if drain is flowing.

(Note) Conduct this test paying attention to rotating sound of the drain motor.

3 Remove the drain plug located on the bottom of the drain pan when the water has to be evacuated from the unit. 4 After the test, fit the drain plug to the original place and turn off the power source.

(5) Fixing of Decorative Panel (The panel fixing bolts are attached on the panel.)

(a) Check with the accessory level gauges that the indoor unit height and the size of ceiling hole are correct.

¡ Remove the level gauges from the indoor unit before fixing the decorative panel. (b) Screw two bolts out of four accessory bolts less than 5 mm in the indoor unit diagonally. (c) Hang the panel on the two bolts and fix them temporarily. (d) Tighten the bolts fixed temporarily and the ramaining two bolts.

Screw the remaining two bolts, and tighten all (four) bolts. (e) Connect the louver motor connector (red) to the panel respectively. (f) If the louver motor is not operated by remote control, check if the connector is connected correctly, and turn off the power

for more then 10 seconds, then reset it.

Panel Joint Setting

¡ The panel can turn 30 mm to the left and to the right in all, and the indoor

unit turns 30 mm to the left and to the right in all in the case of FDT(N)258~508, and 20 mm in the case of FDT(N)208.

Limit Fixing Panel

1 Fix the panel only in the direction shown in the figure. 2 If it is fixed in other way, air will leak. Also, wires cannot be connected for

auto swing and receiver amp.

( )

Pour water into a convex joint

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

Louver motor Electrical

equipment box

Refrigerant piping

Drain piping

260

FDTN-H

(6) Cautions for wireless remote conntroller operation

As wireless remote controller is operated by infrared rays as a signal, make sure to explain to customers the following matters regarding the operating distance and protection from jamming.

¡ Operate it by directing the remote controller switch correctly to the receiver amp section. ¡ Operating distance is shown below, but it may become shorter or longer depending on circumstances. ¡ When its receiving section is directly under the sun or strong illumination, or covered by dust or behind an obstacle, the

operating distance may become shorter or it may not work.

¡ A hook for fixing the remote controller is provided for to keep the controller

from missing.

(a) Operating distance of wireless remote controller

Operate it within the distance and angle shown in the sketch.

1) Standard receiving distance

CONDITION: 300 luxes at the receiving section (at an ordinary office where

there is no ceiling light within one meter around the unit.

2) The receiving distance as viewd from the plane, and the rela-

tion between the illumination at the receiving section and re-

ceiving distance.

CONDITION: The relation between illumination and receiving distance when

the remote controller is operated at the place one meter above the floor with the ceiling 2.4 m high. When the illumination is

doubled, the receiving distance become 2.3.

By switching the dip switch (SW3-3) on the indoor unit printed circuit board ("Specify the following switch number."), the operation mode can be changed to the quiet mode (mild mode). Confirm at installation and change if necessary.

Scope possible for receiving under illumination at receiving section of 300 lux.

Scope possible for receiving under illumination at receiving section of 600 lux.

Ceiling

Floor

Scope possible for receiving

(1) Selection of installation location

Following locations should be avoided:

(a) Where exposed to direct sunlight (b) Near the heat source (c) Highly humid area or where splashed with water (d) Uneven installation surface

(2) Selection of installation location

Exposed installation

(a) Remove the remote controller case.

● Insert finger nails between the upper (white) and lower

(brown) cases and ply them to open.

6.5.2 Installation of the wired remote controller (Optional parts)

(b) Remote controller cords can be taken out upward only as

shown below.

● Cut the remote controller lower case off at the top and thin section with a nipper, knife or other and remove burrs from the cut with a file or other.

pieces of wood-screws.

(d) Connect the remote controller cords with the terminal block.

Make sure to align the terminal numbers on the indoor unit and the remote controller. Polarities are specified on the ter minal block so that the unit will not be operated if the cords are connected improperly.

Terminals: (X) red wire, (Y) white wire, (Z) black wire

Bottom

Lower case

Top

(Cord take-out direction)

Lower case (brown)

Upper case (white)

261

FDTN-H

Models : FDC208~508 series (1) Installation

(a) Accessories

Confirm accessories shown below are attached in the bag with this installation manual.

1) “Edging” for protection of electric wires from opening edge.

(b) Selection of installation location

Select the installation location after obtaining the approval of customer.

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 intake air port and discharge air port.

5) Couple the upper case with the lower case as it was to finish up the installation.

Cautions for extension of remote controller cords

● Make sure to use shielding wires only.

• All models: 0.3 mm

x 3 core wires [MVVS3C,

products of Keihan Cables]

Note (1) When the extension distance exceeds 100 m, change the

wire size as follows: 100 ~ 200 m ... 0.50 mm

⳯ 3 core wires ~ 300 m ... 0.75 mm2 ⳯ 3 core wires ~ 400 m ... 1.25 mm

⳯ 3 core wires ~ 600 m ... 2.00 mm

⳯ 3 core wires

● Make sure to ground one side only of the shielding wire.

6.5.3 Installation of outdoor unit

OWARNING

BE SURE TO READ THESE INSTRUCTIONS CAREFULLY BEFORE BEGINNING INST ALLA TION. F AILURE TO FOLLOW THESE INSTRUCTIONS COULD CAUSE SERIOUS INJURY OR DEATH, EQUIPMENT MALFUNCTION AND/ OR PROPERTY DAMAGE.

1) Set necessary functions in accordance with the model of indoor unit. Refer to (c) for the setting of functions.

2) Couple the upper case with the lower case as they were.

3) Secure the remote controller cords on the wall or other using cord clamps.

Embedded installation

1) Have a JIS box and remote controller cords (use shielding wires or twisted pair wires for extension) embedded in the wall in advance.

Adequate JIS box

● JIS C 8336 Single switch box (without cover)

● JIS C 8336 Medium size square outlet box and two-switch cover

with paint margin

2) Remove the upper case from the remote controller.

3) Secure the remote controller body on the JIS box with 2 pieces of M4 round head screw (provided by customer).

4) Connect remote controller cords with the remote controller. (Refer to the section regarding the exposed installation.)

M4 round head screw x 2 pieces (Provided by customer)

JIS box

(Provided by customer)

Remote controller cords

262

FDTN-H

8) 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.

Request ¡ Restrict the height of obstruction wall in front of the discharge air port to the height of unit or less.

¡ Do not enclose around the unit by the obstruction. Secure the top space for 1 m or more. ¡ When installing the units side by side in series, secure a space of 10 mm between units. ¡ When installing the unit where there is a concern about the short circuit, attach the guide louver in front of

discharge air port to prevent the short circuit.

¡ When installing plural units in a group, secure sufficient intake space to prevent the short circuit. ¡ When installing the unit where it is covered by snow, provide appropriate snow break means.

¡ When installing the unit where it is subject to strong wind, execute wind-breaking work.

Select the space considering the direction of refrigerant piping.

Secure with the anchor bolt.

2) Install the unit directing the discharge air port at a right angle to the wind direction.

(d) Location where strong wind blows against the unit

3) Where the foundation is not stable, secure the unit with wire, etc.

Wind direction

1) Install the unit directing the discharge air port to the wall.

500 or more

Wind direction

Air inlet

Air outlet

(Service space)

(2) 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.

(a) Carry-in

1) When carrying-in the unit, carry it in as packed condition to the installation site as near as possible.

2) 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.

CAUTION

¡ Rope the unit taking the discrepancy of center of gravity into consideration.

Protection plate

Wood base

Air inlet

Open

space

Open space

Distance

Installation

example

FDC208, 258

FDC308 FDC408, 508

Unit : mm

300 100

150

500

100

Open

space

Open

space

Open space

300 100

150

500

100

Open space

Open

space

Open space

300 150

300

500

150

263

FDTN-H

Piping specification

Maximum one way length

FDC208, 258 : L=30 m or less FDC308~508 : 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 (FDC208, 258 : H=20 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.

Heavier on the right side

(b) Moving

1) The unit is heavier on the right side looking from the front of unit (discharge air port side). Therefore, sufficient caution is required for the person who carries the right side of unit. The person who carries the left side must hold the handle of front panle and the conner pillar with both hands.

Unit : mm

Conner pillar

Outdoor unit model Gas pipe Liquid pipe

FDC208 ø 15.88 × t1.0 ø 6.35 × t0.8 FDC258, 308 ø 15.88 × t1.0 ø 9.52 × t0.8 FDC408, 508 ø 19.05 × t1.0 ø 9.52 × t0.8

Indoor unit

Outdoor unit

(b) Piping work

Request

¡ Use the pipe made of following material. Moreover, it is very convenient for you to use the separately sold piping kit.

Material: Phosphor deoxidized seamless copper tube (C1220T, JIS H3300)

¡ In the case of this unit, condensation water is also generated on the liquid piping. Insulate both of the liquid piping and

gas piping perfectly.

¡ In the case of heat pump type unit, the maximum temperature of the gas piping reaches approx. 120˚C, therefore use the

insulation material which has sufficient heat resistance.

¡ When bending the pipe, bend it with large radius as much as possible. Do not bend the same portion of pipe repeatedly.

1) To install the unit, secure the legs of unit by below mentioned bolts without fail.

2) Limit the protrusion height of front side anchor bolts to 15 mm at the maximum.

3) Install the unit firmly so that it does not fall by earthquake and strong wind.

4) Make the concrete foundation by referring the above illustration.

5) Install the unit in level. (The height difference between right and left is within 30 mm.)

(3) Refrigerant piping work

Select the piping specification to fit the specification of Indoor unit and installation location.

(a) Decision of piping specification

Bury the foundation deeper

into the ground. Make the foundation wider.

Secure with bolts.

(M10 to 12)

Item

Model

FDC208 FDC258, 308 FDC408, 508

A 150 150 165

B 150 150 175

C 380 330 380

Anchor bolt position (4 places)

Intake

Discharge

264

FDTN-H

¡ Do not let dust, chips or water enter the pipe while pipe working. ¡ The flared connection for refrigerant piping is required. Flare the pipe after inserting

the flared nut into the pipe.

¡ Tighten the flared connection firmly using 2 of spanners. Comply with the following

value for tightening torque of the flared nut.

¡ In the case of brazing connection, perform brazing while flowing nitrogen gas in the pipe to prevent generation of oxide film

inside the pipe without fail.

1) How to remove the service panel

Remove screws on the service panel, pull down the panel toward the arrow direction, and then remove the panel toward you.

2) Refrigerant pipe connection

a) The piping can be taken out to the right, front, rear and down directions. b) Cut the plate at the knockout portion on the piping penetration section with necessary minimum size. c) Mount the attached edging by cutting it to the appropriate length before connecting the pipe.

Internal hook

IMPORTANT

Rear side connection

Right side connection

Down side connection

Front side connection

Perform the procedure according to the following instructions.

Request ¡ Perform the air purge of Indoor unit and refrigerant piping by vacuuming method without fail.

3) After completion of vacuuming, remove the cap nut for the valve stem and fully open the service valve (for both of liquid and gas) as shown in the right illustration. After confirming that the valve is fully open, tighten the cap nuts (for valve stem and charge port).

Air purge

2) While holding the service valves (both of liquid and gas sides) of the Outdoor unit at fully closed position, perform vacuuming at –0.1 MPa (–76 cmHg) or under from the service valve charge port.

Leak test

1) After tightening all flared nuts on the Indoor unit and Outdoor unit, hold the service valves (both of liquid and gas sides) of the Outdoor unit in fully closed position and perform the leak test from the charge port of service valve to confirm that there is no leakage.

Use nitrogen gas for leak test. Execute the test at the pressure of 3.0 MPa (30kgf/cm

G).

(

)

Open

Hexagonal Head Wrench

(Size 4)

FDC208, 258, 308 Liquid / gas service valve FDC408, 508 Liquid service valve

FDC408,508 Gas service valve

Handle

¡ T ake care so that the piping to be w orked does not contact the parts contained in the unit.

If it contacts the inner parts, abnormal sound or vibration may occur.

Open state

ø 6.35: 16 to 20 (N·m),

(1.6 to 2.0 (kg·m))

ø 9.52: 40 to 50 (N·m),

(4 to 5 (kg·m))

ø 15.88: 90 to 120 (N·m),

(9 to 12 (kg·m))

ø 19.05: 100 to 140 (N·m),

(10 to 14 (kg·m))

265

FDTN-H

Item

Model

FDC208H type FDC258H type FDC308H type FDC408H type FDC508H type FDC208C type FDC258CEN3 FDC258CEP3

Factory charge amount

(kg)

Additional charge amount

1 (kg/m)

Pipe length that

additional charge is not

required (m)

Maximum piping

length (m)

0.98

1.10

1.40

1.67

1.90

0.90

1.05

1.13

0.015

0.025

0.035 2

0.015

0.025

– –

0.02

–

0 ~30m 30 ~ 50m

0 (5) *3

¡ In the case of recharge the refrigerant for service, calculate the proper amount of refrigerant depending on the piping length on

site.

Example : In the case that FDTN508HES-S with piping length of 15m is fully recharged in service.

1.9 (kg) + (15 – 5) (m) × 0.035 (kg/m)= 2.25 (kg)

Recharge amount.

Additional charge amount per 1m.

Length that additional charge is not required.

Total length of the piping (one way).

Factory charge amount for FDC508HES3.

Note (1) *3. The values in ( ) are when connected to FDKN Series indoor unit.

1 Additional charge amount

(4) Drain piping work

¡ Execute the drain piping by using field purchased parts of pipe, elbow, and grommets, if the drainage work is needed.

Drain elbow (1 pc.)

™ There are 3 holes (ø 20) on the bottom plate of Outdoor

unit for draining condensed water.

™ To guide the condensed water to the gutter it is necessary

to install the unit on the flat base or blocks.

™ Connect the drain elbow as shown in the illustration and

close other holes with grommets.

Drain grommet (2 pcs.)

Hard vinyl chloride pipe for general purpose (VP-16)

¡ Calculate the additional charge amount according to Table 1.

Example :In the case that FDTN508HES-S is newly installed with piping length of 40m.

(30 – 5) (m) × 0.035 (kg/m) + (40 – 30) (m) × 0.02 (kg/m)= 1.075 (kg)

Additional charge amount. When piping length is more than 30m, additional charge amount per 1m.

Total length of the piping (one way).

When piping length is 30m or less, additional charge amount per 1m.

Length that additional charge is not required.

30 m

50 m

0.02kg/m

Outdoor Unit Indoor Unit

0 m

(d) Refrigerant charge

1) Outdoor unit is pre-charged R-22 refrigerant at a factory as shown in Table 1.

2) Indoor unit is pre-charged only a small amount of nitrogen gas for prevention of the air entry.

3) Additional charge on site is required when the pipe length is longer than that of restricted value (Which is varied wirh the type of Indoor unit) as shown in Table 1.

Table 1

266

FDTN-H

Item

Model

FDC208H(C) type FDC258H(C) type FDC258CEP3 FDC308HEN3 FDC308HES3 FDC408H type FDC508H type

Phase

Circuit breaker

Switch breaker

(A)

Over-current protector

rated capacity (A)

15 20

Power source

wires

(minimum)

Interconnecting

and grounding

wires (minimum)

ø 2.0 mm

5.5mm

ø 2.0 mm

5.5mm

ø 1.6

(6) Test run

Power source and ground terminal block

Wiring clamp ™ Secure the wiring so that no external force

is applied to the connecting portion of terminal.

Take out direction of wiring ™ Same as the refrigerant piping, 4

directions are allowed, which are right, front, rear and down.

Wiring diagram ™ Wiring diagram is fixed at the backside

of service panel.

¡ Run the unit continuously for about 30 minutes, and check the following.

™ Suction pressure at check joint on the compressor suction pipe. ™ Discharge pressure at check joint on the compressor discharge pipe (for Heat pump model), or at check joint of service

valve for gas pipe (for cooling only model).

™ Temperature difference between return air and supply air for Indoor unit.

¡ Refer to “Check Indicator Table” on wiring diagram of Outdoor unit or “User’s manual” of Indoor unit for diagnosis of operation

failure.

Interconnecting wires

Circuit breaker

Earth leakage breaker

Outdoor unit

Indoor unit

HIGH VOLTAGE

(b) Wiring connection.

1) Connect the same terminal number between the Indoor unit and Outdoor unit as shown in the following diagram.

2) Make wiring to supply to the Outdoor unit, so that the power for the Indoor unit is supplied by 1 and 2 terminals.

3) Secure the wiring with wiring clamp so that no external force is transmitted to the connecting portion of terminal.

4) There is a ground (Earth) terminal in the control box.

Interconnecting wires

Circuit breaker

Earth leakage breaker

Outdoor unit

HIGH VOLTAGE

Indoor unit

1 1 phase model

Note (1) The diagram below is for

models equipped with heat pumps. Cooling only units do not have TB (4), (5).

IMPORTANT

● Electric wiring work should be conducted only by authorized personnel.

● Use copper conductor only.

● Power source wires and Interconnecting wires shall not be lighter than polychloroprene

sheathed flexible cord (design HO5RN-F IEC 57).

● Do not connect more than three wires to the terminal block.

● Use round type crimped terminal lugs with insulated grip on the end of the wires.

2 3 phase model

Note (1) The diagram below is for

models equipped with heat pumps. Cooling only units do not have TB (4), (5).

CAUTION

THIS UNIT WILL BE STARTED INSTANTL Y WITHOUT "ON" OPERA TION WHEN ELECTRIC POWER IS SUPPLIED. BE SURE TO EXECUTE "OFF" OPERATION BEFORE ELECTRIC POWER IS DISCONNECTED FOR SERVICING.

● This unit has a function of automatic restart system after recovering power stoppage. DO NOT LEAVE OUTDOOR UNIT WITH THE SERVICE PANEL OPENED.

● When the service panel is removed, high voltage portion and high temperature areas are

exposed.

IMPORTANT

● Check that the service valves are fully opened without fail before operation.

● Turn on the power for over 12 hours to energize the crankcase heater in advance of

operation.

● Wait more than 3 minutes to restart the unit after stop.

(5) Electrical wiring

™ This air conditioning system should be notificated to supply authority before connection to power supply system. (a) Selection of size of power supply and interconnecting wires.

¡ Select wire sizes and circuit protection from Table 2. Table 2 ( This table shows 20m length wires with less than 2% voltage drop. )

267

FDTN-H

S Models FDC206~506 series (1) Installation

(a) Accessories

Confirm accessories shown below are attached in the bag with this

installation manual.

1) “Edging” for protection of electric wires from opening edge.

(b) Selection of the place of installation

Select the place of installation satisfying the following conditions and, at the same time, obtain a consent from the client or user.

1) Place where air circulates. Place free from heat radeation from other heat sources.

2) Place where drain water may be discharged. Place where noise and hot air may not disturb the neighborhood.

3) Place where there is not heavy snowfall in the winter time.

4) Place where obstacles do not exist near the inlet air port and outlet air port.

5) Place where the outlet port may not be exposed to a strong wind.

6) Place surrounded at four sides are not suitable for installation. 1m or more of overhead space is needed for the unit.

7) Mount guide-louvers to place where short-circuit is a possibility.

8) When installing several unit, secure sufficient suction space to avoid short circuiting.

a) Open space requirement around the unit

b) Installation where the area with strong winds.

Install the unit so that the air outlet section of the unit must NOT be faced toward wind direction.

Unit: mm

Model

FDC206, 256

FDC306 FDC406, 506

Distance

L1 open 100 open open 500 open open 500 L2 100 open 300 0 open 300 0 open L3 100 500 100 150 100 150 300 150

Case

a) Concrete foundation

Note (1) Give enough room for the concrete

foundation to fix by anchor bolts.

500

Air inlet L3

Air outlet

Air inlet

(Servicing space)

Gas pipe

Check joint

Service valve

Outdoor unit

Flare connection

Liquid pipe

Flare connection

Indoor unit

1) Installation Fix the unit in a proper way according to the condition of a place where it is installed by referring to the following.

Install the unit so that the angle of indination must be less than 3 degrees.

(2) Refrigerant piping

(a) Outline of piping

b) Foundation anchor

Note (1) Place the concrete foundation deep enough.

Unit

Anchor bolt

Concrete foundation

To fix by bolt

Unit

Concrete foundation

Anchor bolt

268

FDTN-H

(b) Piping size

• Install the removed flared nuts to the pipes to be connected, then flare the pipes.

• One way piping length: Less than 30 m

• Vertical height difference: Less than 15 m Precautions for refrigerant piping

• Do not twist or crush piping.

• Be sure that no dust is mixed in piping.

• Bend piping with as wide angle as possible.

• Keep insulation both gas and liquid piping.

• Check flare-connected area for gas leakage.

(d) Air purge

Carry out the air purge of the indoor unit and refrigerant piping by vacuuming. Procedures.

1) Tighten all the flare nuts of the piping on the side of indoor and outdoor units so that there is no leakage.

2) Carry out vacuuming from the service valve charge port with the service valves (both liquid and gas side) of the outdoor unit fully closed.

3) After vacuuming, remove the cap nut for the valve stem, and thghten the cap nuts (cap nuts for valve stem and charge port) with service valve (both liquid and gas) fully opened.

(e) Method of opening and closing service valve of outdoor unit

1) Remote the hexagonal cap nut.

2) Operate the valve using a hexagonal wrench to open by left turn and to close by right turn.

3) Tighten the hexagonal cap nut after the piping works.

(f) Additional charge of refrigerant

Model FDC206 FDC256, 306 FDC406, 506

Gas piping φ15.88 × 1.0 mm φ15.88 × 1.0 mm φ19.05 × 1.0 mm

Liquid piping φ6.35 × 0.8 mm φ9.52 × 0.8 mm φ9.52 × 0.8 mm

Notes (1) Basic refrigerant charge amount means refrigerant amount when refrigerant piping length is 0 m.

(2) When the refrigernat piping length exceeds the length that additional refrigerant charge is not required, charge

additional refrigerant based on to the calculated amount of refrigerant per unit piping length.

Item

FDC206H type 0.88 1.00 FDC256H type 1.13 1.25 0.025 FDC306H type 1.18 1.30 5 m

(5) (8)

FDC406H type 1.43

(4)

1.60

0.035

FDC506H type 2.13 2.30 FDC206CEN3 0.78 0.90

30 m

FDC206CEP3 1.03 1.15 FDC256C type 1.23 1.35

0.025

FDC306C type 1.18 1.30 5 m

(7) (8)

FDC406C type 1.38

(6)

1.55

FDC506C type 1.68 1.85

0.035

FDC506CEM 1.63 1.80

Model

Basic refrigerant charge amount

(1)

Factory charge amount of refrigerant

Additional

charge amount

(1)

per meter

Outdoor unit

Indoor unit

Length that

additional

charge is not

required

Maximum

piping length

Unit : kg

Holding charged

(

)

Hexagon wrench size

Gas side

FDC206~306

Model

Item

4 4

FDC406, 506

6 4

Liquid side

269

FDTN-H

Example of additional charge amount calculation

Calculate the additional charge amount for the model FDTN508HES when the piping length is 25 m.

(25 -5) × 0.035 = 0.70

Additional charge amount (kg)

Additioanl charge amount per 1 m (kg/m)

Length that additional refrigerant charge is not required (m)

Total length of the piping (one way) (m)

Additional charge amount of refrigerant = 0.70 kg (Calculate the amount in any case.)

(3) The unit is holding charge type that all of the refrigerant is charged in the outdoor unit and in the indoor unit only a

small amount of gas is filled for prevention of the air entry. (4) In the case of FDR408H and FDU408H, it is 1.60 kg. (5) In the case of FDR408H and FDU408H, it is 0 m. (6) In the case of FDU408C, it is 1.55 kg. (7) In the case of FDU408C, it is 0 m. (8) In the case of FDKN208 and FDKN308, it is 10 m.

(3) Electric wiring

•

This air conditioning system should be notificated to supply authority connection to power supply system.

(a) Selection of size of power supply and interconnecting wires.

Precautions for Electric wiring

•

Electric wiring work should be conducted only by authorized personnel.

•

Do not connect more than three wires to the terminal block. Always use round type crimped terminal lugs with insulated

grip on the ends of the wires.

•

Use copper conductor only.

•

Power source wires and interconnecting wires shall not bo lighter than polychloroprene shcathcd fiexible cord

(design H05RN-F IEC57).

Select wire sizes and circuit protection from table below. (This table shows 20 m length wires with less than 2% voltage drop.)

OWARNING

DANGER OF BODILY INJURY OR DEATH TURN OFF ELECTRIC POWER AT CIRCUIT BREAKER OR POWER SOURCE BEFORE MAKING ANY ELECTRIC CONNECTIONS. GROUND CONNECTIONS MUST BE COMPLETED BEFORE MAKING LINE VOLTAGE CONNECTIONS.

Item Circuit breaker

Model

FDC206 type

FDC256 type

5.5mm

FDC306EN type

8 mm

FDC306ES type 30 15 φ1.6 mm φ1.6 mm FDC406 type

φ2.0 mm

FDC506 type 5.5 mm

FDC506EM type 30 8 mm

(b) Wiring connection

Make wiring to supply power to the outdoor unit, so that the power for the indoor unit is supplied by 1 and 2 terminals.

3) 3 phase three-wire model

1) 1 phase model

2) 3 phase four-wire model

Power source wire size

(minumum)

Interconnecting and

grounding wires

(minimum)

Overcurrent Protector

rated capacity (A)

Switch breaker

(A)

Phase

Outdoor unit

Indoor unit

Circuit breaker Earth leakage

breaker

HIGH VOLTAGE

Outdoor unit

Indoor unit

Circuit breaker

Earth leakage breaker

HIGH VOLT AGE

Outdoor unit

Indoor unit

Circuit breaker

Earth leakage breaker

HIGH VOLTAGE

2 TB

Interconnecting wires

Note (1) The diagram above is for models equipped with heat pumps. Cooling only units do not have TB2 (4), (5).

270

FDTN-H

1) Remove set screws on the side before taking off the side panel (for model FDC206, 256) or the front panel (for model FDC306, 406, 506) toward the direction shown in figure.

2) Connect wires to the terminal block correctly and fix the wires with a wire clamp equipped near by the terminal block.

3) Route the wires in a proper way and penetrate the wires through the opening for electric wiring on the side panel.

FDC206, 256 type

(4) Test run

(a) Before starting test run (for all Heat pump models and Cooling only model FDC506CES)

Confirm whether the power source breaker (main switch) of the unit has been turned on for over 12 hrs to energize the crankcase heater in advance of operation.

(b) Test run

Run the unit continuously for about 30 minutes, and check the following.

¡ Suction pressure at check joint of service valve for Gas pipe. ¡ Discharge pressure at check joint on the compressor discharge pipe. ¡ Temperature difference between return air and supply air for indoor unit.

OCAUTION

THIS UNIT WILL BE STARTED INSTANTLY WITHOUT “ON” OPERATION WHEN ELECTRIC POWER IS SUPPLIED. BE SURE TO EXECUTE “OFF” OPERATION BEFORE ELECTRIC POWER IS DISCONNECTED FOR SERVICING.

● This unit has a function of automatic restart system after recovering power stoppage.

OWARNING

DO NOT CONNECT THE NEUTRAL WIRE N TO L1 ( R ), L2 ( S ) OR L3 ( T ) PHASE. INTERCONNECTING WIRES MUST BE WIRED WITH SAME SYMBOLS ON THE TERMINALS OF BOTH INDOOR AND OUTDOOR UNIT. INCORRECT WIRING CAUSE EQUIPMENT DAMAGE OR A FIRE.

Side panel

Opening for electric wiring

FDC306, 406, 506 type

Opening for electric wiring

Front panel

271

FDTN-H

6.6 MAINTENANCE DATA

6.6.1 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 R22 is very insoluble in water, even a small amount of moisture left in the refrigerant 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

pressure in the unit. If there is an internal pressure, it should be relived through the service port.

(b) Connect the charging hose of the gauge

manifold to the service port of the gas piping. Close high pressure valve 2 of gange manifold.

(c)

Connect the charging hose A to a vecuum pump. Repeat evacuation in the following sequence.

Notes (1) Do not use the refrigerant pressure to expel air.

(2) Do not use the compressor for evacuation. (3) Do not operate the compressor in a vacuum condition.

Start the vacuum pump.

Compond pressure gauge indicates -0.1 MPa (-76 cmHg)

Operate the vacuum pump for more than 10 minutes after -0.1MPa (-76 cmHg) Hg is indicated.

Close low pressure valves 1 of gauge manifold.

Stop the vacuum pump.

Notes (1) Refer to the exterior-view drawing for the

position of the service valve.

(2) When connecting of the service valve, flare

connection for both the indoor and outdoor unit.

Outdoor unit

Flare connection

Indoor unit

Liquid line

Gas line service port

Charging hose

Service hoses

Vacuum pump

Gauge manifold

Refrigerant cylinder

272

FDTN-H

(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.

6.6.2 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 ¡

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

Cir-

cuit

Too low

A little low

Normal

A little

high

Too high

273

FDTN-H

6.6.3 Diagnosing of microcomputer circuit

(1) Before starting diagnosis

(a) Required tools and measurement equipment

For unit disassembling

Small and large Philips screw driver, Flat head screw driver, Wrench

For diagnosis

Tester (A general tester will do)

(Diagnosis tools and equipment for refrigeration circuit should be prepared if necessary.)

(2) Selfdiagnosis function

(a) Indoor unit side

Only case of wireless remote control model.

Error Code

Location of Problem Cause

Defective connection or broken wire for operating switch signal wire. Signal noise has entered the operating switch wire.

Is the circuit board for the operating switch or the circuit board for the indoor unit is defective (communication circuit defective)?

Indoor unit heat exchanger thermistor defective (element defective or broken wire). Defective connection of connector for thermistor.

Indoor unit return thermistor defective (element defective or broken wire). Defective connection of connector for thermistor.

Indoor unit heat exchanger thermistor defective (short circuit). Indoor unit circuit board defective (defective thermistor input circuit)?

Indoor unit circuit board defective (defective thermistor input circuit)?

Indoor unit circuit board defective (defective thermistor input circuit)? Heating overload (temperature of heat exchanger for indoor unit abnormally high) Indoor unit heat exchanger thermistor defective (short circuit). Indoor unit circuit board defective (defective thermistor input circuit)? Failure with the condensate pump (DM), or open circuit or disconnection of connector with the condensate pump. Malfunctioning of the float switch (erroneous functioning) Indoor unit circuit board defective (defective float switch input circuit) Indoor unit circuit board defective (defective DM driving output circuit) Gas leak.

E57

Operating switch wire (signal noise)

Circuit board for operating switch or indoor unit

Indoor unit heat exchanger thermistor

Indoor unit circuit board Indoor unit air inlet thermistor

Indoor circuit board

Indoor unit heat exchanger thermistor Indoor unit circuit board

Indoor unit circuit board Installation and operating conditions Indoor unit heat exchanger thermistor Indoor unit circuit board Failure in drainage Float switch

Insufficient refrigerant

•

Cause

Disconnection on heat exchanger thermistor, Poor connection of connector.

Disconnection on return thermistor. Poor connection of connector.

Drain reverse slope. Drain pump abnormality. Float switch abnormality.

Insufficient gas.

Clogged air filter Shortcircuit on the indoor unit Shortcircuit of heat exchanger thermistor

Check Lamp (yellow) Flashing

Flashing Conditions

If the heat exchanger thermistor temperature of indoor unit is measured at -50°C or lower for 6 minutes or more following operation of the compressor.

If the return thermistor temperature of indoor unit is measured at -50°C or lower for 6 minutes or more after turning the power ON.

Float switch operation

If the heat exchanger thermistor temperature of indoor unit is measured at 25°C or higher for 40 minutes or more following operation of the compressor.

If the indoor heat exchanger thermistor temperature is detected twice to be 68°C or over within 60 minutes during the heating operation.

Nature of Breakdown

Heat exchanger thermistor of indoor unit abnormality.

Return thermistor of indoor unit abnormality.

Drain abnormality.

Abnormality caused by insufficient refrigerant.

Heating overload error

1 time flash

2 time flash

4 time flash

5 time flash

6 time flash

Run Lamp (green) Flashing

Table of inspection items based on error codes

Cause

Restore automatically at 85% of rating or higher.

Flashing Conditions

During the low voltage protection control 52 C OFF (Conpressor, Outdoor unit)

Nature of Breakdown

When the power source voltage is 80% of rating or lower.

6 time flash

Note (1) Inspection LED display has a cycle of 8 seconds (flashing time of 0.5 seconds).

Only case of wired remote control model.

274

FDTN-H

Thermistor

(Return air, heat exchanger) For test mode selection (Shortcircuit : Test mode)

External input / output function

Receiving unit

(

)

Backup switch Indiction lamps

Transformer, primary side

Transformer, secondary side

Power supply connector for PCB

(

)

Power supply

SW5 SW3

SW4

Parts layout on the indoor unit PCB

Models: FDTN, FDEN series

Model: FDKN series

Models: FDT, FDR, FDU, FDUM, FDF, FDFL series

(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 circuit board 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 discovered, replace with the assembly of parts as shown below.

(a) Single-unit replacement parts for circuit board of indoor unit. (Peripheral electric parts for circuit board.)

Indoor unit printed circuit board, thermistor (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. (Refer to the following parts layout drawing for the location of parts number.)

Parts number

PJA505A069 PHA505A007 PHA505A008

Model

FDT, FDR, FDU, FDUM, FDFL

FDF

Parts number

PJA505A080AZ

PJA505A080Z

Model

FDTN, FDEN

FDKN208

FDKN258, 308

976348 13

52X6

52X5 52X4 52X7 52X1 52X2 52X3

CNW1

CNW2

CNO

CNT CNB

CNN

CNH

CNS

CNQ

SW4

SW3

SW5

{

Transformer. primary side Transformer. Secondary side

(Power supply connector for PCB)

Power supply

Control switch

Termistor

(Return air)

External input/output function

Termistor (Heat exchanger)

SW4

SW3 SW5

Transformer, primary side

Power supply

Transformer, secondary side

Power supply connector for PCB

(

)

External input / output function

For test mode selection (Shortcircuit : Test mode)

Thermistor (Return air, heat exchanger)

Receiving unit

Backup switch Indiction lamps

(

)

SW4

SW3

SW5

CNL

CNNCNHCNQ

CNE

SW3

SW4

SW5

CNV

CNT

52X6

52X5 52X4 52X7 52X1 52X352X2

976348 13

11 10

SW2

SW2 (Only case of FDTN) (Optional : For auto lift panel)

275

FDTN-H

• Function of jumper wires

Name Function

J1(SW5-1)

With 1 Phase model

None 3 Phase model

J2(SW5-2)

With Cooling only type

None Heat pump type

J3(SW5-3)

With Pulse input

None Step input

J4(SW4-1)

With

—

None

J5(SW4-2)

With Antifrost 2.5˚C

None Antifrost 1˚C

J6(SW4-3)

With With abnormality resetting

None Without abnormality resetting

J7(SW4-4)

With

4 position louver control: valid

None

4 position louver control: invalid

*1 With

FDKN208 type

J7(SW4-4) None

FDKN258, 308 type

• Function of DIP switched (SW3)

Switch Function SW3-1

ON Power off guaranteed

OFF No power off guaranteed

ON With low-voltage detection

control

SW3-2

OFF Without low-voltage detection

control

SW3-3

ON Power up mode (UHi-Lo)

OFF Mild mode (Hi-Lo)

ON Indoor fan is Lo when heating

thermostat is OFF.

SW3-4

OFF Indoor fan is OFF when

heating thermostat is OFF.

Defective indoor unit heat exchanger thermistor

010 304020 50

5kΩ at 25˚C

Temperature (˚C)

Note (1) 22.5 kΩ at -6˚C

Return air thermistor (Th

I-A)

Indoor unit heat exchanger thermistor (ThI-R) Resistance temperature characteristics

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 not there any

broken wire?

Defective indoor unit PCB Replacement (Defective indoor unit heat exchanger thermistor input circuit)

Defective indoor unit heat exchanger thermistor Replacement

Indoor unit

Check Lamp (yellow) 1 time flash

Defective return air thermistor

YES YES

Is the return air

thermistor connector

connection OK?

Correction

Is the return air

thermistor characteristics

OK or is there a

broken wire?

Defective return air thermistor Replacement

Defective indoor unit PCB Replacement (Defective return air thermistor input circuit)

Indoor unit

Check Lamp (yellow) 2 time flashes

Note (1) Characteristics as per the above graph.

Note (1) *1 J7 (SW4-4) is for switching models on the FDKN Series.

(ii) Please match the settings of control switching switches (SW3, SW4, SW5) to the settings they had before they were

replaced. With these switches, if the printed circuit had a jumper wire before being replaced, set to jumper wire ON if there was a jumper wire and jumper OFF is these was not.

(iii) Connect the fast-on terminals and connectors that are to the circuit board for the micro-computer.

Connect by matching the wire color of the fast-on terminal with the color printed on the circuit board for the microcomputer. Note (1) When connecting to the fast-on connection for the circuit board for the micro-computer, use care so as not to

excessively distort the circuit board.

S Only case of wireless remote control model

276

FDTN-H

()

YES YES

Are the heat exchanger thermistor characteristics OK, is

there no short

circuit?

YES

Is the indoor

unit heat exchanger

thermistor connector

connection OK?

YES

Is the air filter

clogged?

Correction

Washing

Adjustment

Is the heating

under overload?

Defective indoor unit PCB Replacement (Defective indoor unit heat exchanger thermistor input circuit)

Defective heat exchanger thermistor Replacement

(1)

Heating overload

Note (1) To see whether or not it is over-

loaded, check the following:

uIs the inside/outside air temperature too high?

uIs there any short circuit? uIs the refrigerant excessive?

Indoor unit

Check Lamp (yellow) 6 time flashes

Abnormality casued by insufficient refrigerant.

Indoor unit

Check Lamp (yellow) 5 time flashes

YES

Is the

amount of refrigerant

circulation good? (If refrige-

rant is insufficient, the ca-

pillary tubes may be

plugged.)

Printed circuit board for indoor unit no good replace.

Charge with refrigerant. Replace capillary tubes.

YES

Are the

characteristic values for

the heat exchanger

thermistor OK?

Replace heat exchanger thermistor.

Note (1) Refer to previous page for heat exchanger thermistor tempera-

ture resistance characteristic values.

YES

Is there any

overflow?

Is the float

switch tripper?

Note (1) Check if power source is there between DM connectors.

Is the angle of

drain piping good. Is there

any problem?

YES

(1)

Is there output

for condensate motor

(DM)?

Defective indoor unit PCB Replacement (Defective DM driving output circuit, defective float switch input circuit)

Repair or replace the float switch

Defective indoor unit PCB Replacement (Defective condensate motor output circuit)

●

Check DM broken wire, burning, locking.

● Are there any DM connector loose.

● Are there any PCB faston terminal loose.

● Are there any DM wire broken.

Repair

Drain abnormality

Indoor unit

Check Lamp (yellow) 4 time flashes

277

FDTN-H

YES YES

YES

Does the

voltage oscillate between DC6 and 10V between control switch circuit board connector

(CnB

) Y (White)

to Z (Black)?

Does the

voltage oscillate

between DC6 and

10V between indoor unit

PCB connector (CNB)

2 (White) to 3

(Black)?

YES

Is there

DC 10.8V

between control

switch circuit board con-

nector (CnB2) X

(Red) to Z

(Black)?

Is there

DC 10.8V

between indoor unit

PCB connector (CNB)

1 (Red) to 3

(Black)?

YES

Defective indoor unit PCB

Power

supply

reset

Is it

normalized?

Unit is normal (Intrusion of accidental noise on the control switch cord)

Defective control switch PCB

(1)

The control switch wiring (white) or (black) is broken or have a defective connection.

Defective control switch PCB Replacement Defective indoor unit PCB Replacement

The control switch wiring (red) or (black) is broken or have a defective connection.

010 304020 50

5kΩ at 25˚C

Temperature (˚C)

Note (1) 22.5 kΩ at -6˚C

Return air thermistor (Th

I-A)

Indoor unit heat exchanger thermistor (ThI-R) Resistance temperature characteristics

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 not there any

broken wire?

Defective indoor unit PCB Replacement (Defective indoor unit heat exchanger thermistor input circuit)

Defective indoor unit heat exchanger thermistor Replacement

YES YES

Is the return air

thermistor connector

connection OK?

Correction

Is the return air

thermistor characteristics

OK or is there a

broken wire?

Defective return air thermistor Replacement

Defective indoor unit PCB Replacement (Defective return air thermistor input circuit)

Note (1) Characteristics as per the above

graph.

S Only case of wired remote control model

Error display :

e 1

[Communication error between control switch ~ Indoor unit PCB]

Error display :

[Defective indoor unit heat exchanger thermistor]

Error display :

[Defective return air thermistor]

Note (1) If it is normalized by changing PCB, judge the control switch or indoor

unit PCB (Communication error between control switch and unit) is detective.

• Normal voltage for control switch wiring (DC) Between X and Z : 10.5 ~ 10.8 V Between Y and Z : 5 ~ 10.8 V

278

FDTN-H

()

YES YES

Are the heat exchanger thermistor characteristics OK, is

there no short

circuit?

YES

Is the indoor

unit heat exchanger

thermistor connector

connection OK?

YES

Is the air filter

clogged?

Correction

Washing

Adjustment

Is the heating

under overload?

Defective indoor unit PCB Replacement (Defective indoor unit heat exchanger thermistor input circuit)

Defective heat exchanger thermistor Replacement

(1)

Error display :

[Heating overload]

Note (1) To see whether or not it is over-

loaded, check the following:

s Is the inside/outside air temperature too high?

sIs there any short circuit? sIs the refrigerant excessive?

Error display :

e57

[Insufficient refrigerant]

Note (1) Refer to previous page for heat exchanger thermistor heat resistance

characteristic values.

Are the

heat exchanger

thermistor characteristic

normal?

YES

Defective heat exchanger thermistor Replacement

Is the unit

normalized?

Defective indoor unit PCB Replacement (Defective indoor unit heat exchanger thermistor input circuit)

Inspect at the unit side. Inspect at the unit side.

Insufficient refrigerant

During cooling

• Is indoor fan operating?

• Is the service valve (gas and

liquid side) opened fully?

• Is there no short circuit?

Recharge with (weighed amount) of refrigerant.

(1)

Error display :

[Failure in drainage]

YES

Is there any

overflow?

Is the float

switch tripped?

Note (1) Check if power source is there between DM connectors.

Is the angle of

drain piping good. Is there

any problem?

YES

(1)

Is there output

for condensate motor

(DM)?

Defective indoor unit PCB Replacement (Defective DM driving output circuit, defective float switch input circuit)

Repair or replace the float switch

Defective indoor unit PCB Replacement (Defective condensate motor output circuit)

●

Check DM broken wire, burning, locking.

● Are there any DM connector loose.

● Are there any PCB faston terminal loose.

● Are there any DM wire broken.

Repair

279

FDTN-H

Outdoor unit LED

Green

Keeps flashing

Stays OFF

1 time flash

2 time flashes

3 time flashes

4 time flashes

5 time flashes

1 time flash

2 time flashes

3 time flashes

Red

Stays OFF

Failure at: Contents of the failure

Installation or operation status

Discharge gas thermistor

Outdoor heat exchanger thermistor

Outdoor temperature thermistor

Discharge gas thermistor

Outdoor heat exchanger thermistor

CM wiring

Power wiring

• Over current of the compressor motor.

• Open phase at L2 phase (secondary wiring of 52C) of compressor.

• Defective outdoor unit PCB.

Stays OFF 1 time flash

• The outdoor power wiring is in reversed phase.

• Open phase at L3 phase (primary side).

• Incorrect set-up of outdoor unit PCB.

Normal/Power is supplied.

• The outdoor heat exchanger temperature is too high [70°C or over].

• Failure with the outdoor heat exchanger thermistor.

• The discharge gas temperature is too high.

• Failure with the discharge gas thermistor.

• Failure or open circuit with the outdoor heat exchanger thermistor or imperfect connection of the connector.

• Failure or open circuit with the outdoor temperature thermistor or imperfect connection of the connector.

• Failure with the discharge gas thermistor or imperfect connection of the connector.

• The wiring (secondary wiring of 52C) to the compressor is open.

(4) Outdoor unit side (FDC308, 408, 508 model only)

Failure mode on the outdoor unit is indicated by flashing both Green LED (LED-G) and Red LED (LED-R) on the printed circuit board.

Check Indicator Table

Parts No.

PCA505A046ZN

Model

1 phase model

Parts No.

PCA505A046ZS

Model

3 phase model

b) Set the overcurrent value using the overcurrent setting switch (SW3) for CM. Refer to the following table at the

setting.

• Table of switch (SW3) setting

Model FDC508HES3

Setting value (A) 15

Table of switch

setting Make ON/OFF setting for each

switch No.

( : ON, : OFF)

654321

FDC408HES3

654321

FDC308HES3

654321

FDC308HEN3

654321

“Check Indicator” is resetted when power supply is turned off once and the failure is fixed.

(a) Procedure for diagnosing trouble for outdoor unit

When diagnosing trouble for the outdoor unit, check the flashing and turns of the inspection indicator lamp (red LED) and fault indicator lamp (green LED) to obtain a general concept of the nature of the problem. Then inspect and perform repair .

1) Unit replacement parts related to printed circuit board for outdoor unit.

Micro-computer for outdoor unit, microcomputer, printed circuit board, thermistor (heat exchanger, discharge piping and outdoor air), fuses and transformer.

2) Summary of replacement for micro-computer for outdoor unit

a) Check the following part number

280

FDTN-H

SW5

OFF

Description

SW6

(J17)

(J18)

OFF

Description

• Switching by SW5 • Switching by SW6

Defrost Switching

De-icing Switching

Actual spot

Ordinary

Enabled

Disabled

4-Way Valve Control

Enabled

Disabled

14°C 18°C

Defrost Circulation

Temperature Switching

X01

R10

X05X09X08

CNA2

X07

X02

CNF

X03X04

R12

R11

R8R7R6R5R2R1R4

123

SW5

234

SW3

52C

20S

SV2

CF1 CF1

CF2CF2

63H163H1

63H263H2

CNA1

CT1

CNL

CNQ

CNE

CNR

LED-D

LED-R

123

J20

SW6

J19

J18

J17

PCB power supply connector

(Primary side)

PCB power supply connector

(Secondary side)

Inspection display lamp

(LED·Red)

Inspection display lamp

(LED·Green)

SW5

SW3

SW6

Parts layout on the outdoor unit PCB

281

FDTN-H

52C secondary side

L2 or L3 phase open?

Repair

YES

Defective outdoor unit PCB Replacement (Defective CT circuit)

(1)

(2)

Outdoor unit

Red LED Green LED

3 time flashes

Stays OFF

Is L3 phase at

primary side at open

phase

Correction

YES

Defective outdoor unit PCB Replacement

Outdoor unit

Red LED Green LED

1 time flash

Stays OFF

Power supply

checked at

phase of 52C

secondary side?

YES

Compressor overcurrent?

Inspect at the unit side.

(1)

• Is the power supply voltage correct (not too low)?

• Are the power supply wires appropriate (not too thin)?

• Is the overcurrent setting correct (SW3 setting)?

• Is not it operated under overload?

Defective outdoor unit PCB Replacement (Defective CT input circuit)

• 3 Phase: Open phase at

phase

• Defective 52C

• 3 phase: Broken wire at

phase between 52C ~ CM or TB1 ~ 52C

• During cooling: Is FM

operating?

• At heating: Is FM

operating? Is the service valve (gas side) opened fully? Is the filter clogged?

• Is it overcharged?

• Is the installation space of indoor outdoor unit adequate?

• Is there any short circuit on the indoor/ outdoor unit?

Overcurrent of the compressor motor

Note (1) Measure and check the current value.

Confirm that the overcurrent setting by SW

3 of outdoor

unit PCB is correct.

Outdoor unit

Red LED Green LED

2 time flashes

Stays OFF

The wiring (secondary wiring of 52C) to the compressor is open.

Notes (1) When voltage is detected at 52C primary side L2 or

phase but not at the secondary side, check also 52C (broken coil, poor contact).

(2) When voltage is detected at 52C primary side

phase and there is no error at 52C (52C is energized if TB

or L3 terminal and 52C coil secondary side connector

are short circuited), the outdoor unit PCB (defective X

circuit or X

) or indoor unit PCB (defective thermostat

circuit) is defective.

(b) Inspection method when there are fault lamps (outdoor unit LED)

Open phase at L3 phase (Primary side)

282

FDTN-H

The discharge gas temperature is too high.

The outdoor heat exchanger temperature is too high (70°C or over)

Are the heat

exchanger thermistor

Charateristisc

Normal?

YES

Heart exchanger thermistor replacement

Is the unit

normalized

Defective outdoor unit PCB Replacement (Defective heat exchanger thermistor input circuit)

Cooling, overload operation?

Check the unit side closely

• Is outdoor fan motor operating?

• Is the outdoor unit shortcircuited?

• Is the installation space adequate?

• Is there too much refrigerant?

Reset

Error stop

60°C70°C

Outdoor unit heat exchanger temperature

(1)

Note (1) Outdoor unit heat exchanger thermistor detects

the state of cooling overload operation.

Outdoor unit

Red LED Green LED

4 time flashes

Stays OFF

Temperature

0°C10°C30°C40°C20°C50°C

5kΩ at 25°C

Is the outdoor

unit heat exchanger

themistor connector

OK?

Repair

YES

Are the outdoor

unit heat exchanger themistor

characteristics OK, is there

any broken wire?

Defective outdoor unit heat exchanger thermistor Replacement

Defective outdoor unit PCB Replacement (Defective outdoor unit heat exchanger thermistorinput circuit)

Outdoor unit heat exchanger thermistor (Th

O-

R) Resistance

temperature characteristics

Resistance

(kΩ)

Note (1) 22kΩ at -6°C

Defective outdoor unit heat exchanger thermistor

Outdoor unit

Red LED Green LED

1 time flash 1 time flash

Outdoor unit

Red LED Green LED

5 time flashes

Stays OFF

Is the

discharge gas ther-

mistror characteristics

normal?

YES

Discharge pipe thermistor replacement

Is the unit

normalized

Defective outdoor unit PCB Replacement (Defective discharge gas thermistor input circuit)

Discharge gas temperature error? (At cooling/heating operation)

Check the unit side.

• Insufficient refrigerant Charge the refrigerant (measure)

• Is it the overload operation?

Operable

Error stop

90°C 135°C

Discharge pipe temp.

• During cooling: Is FMo operating?

• During heating: Is FMI operating?

Are control valves (both liquid, gas) fully opened during both cooling and heating.

• Is the installation space of indoor/ outdoor units adequate?

• Is there any short circuit air flow for indoor/outdoor units?

283

FDTN-H

300

400

200

100

–50

°C

Temperature [T]

T < 0°C

T > 0°C

Is the outdoor

air temperature thermistor

connector connection

OK?

Repair

YES

Is the outdoor

temperature thermistor

characteristics OK, is there

no broken wire?

Defective outdoor temperature thermistor Replacement

Defective outdoor unit PCB Replacement (Defective outdoor temperature thermistor input circuit)

Temperature-resistance characteristics of outdoor temperature thermistor (Th

O-

Thermistor resistance

(kΩ)[T

Thermistor resistance

(kΩ)[T

Defective outdoor temperature thermistor

Outdoor unit

Red LED Green LED

2 time flashes

1 time flash

Temperature [T]

80°C

100

°C

80°C100°C120

°C

Is the

discharge gas thermistor

connector connection

OK?

YES

Repair

Are the discharge

gas thermistor characteristics

OK, is there no

broken wire?

Defective discharge gas thermistor Replacement

YES

Defective outdoor unit PCB Replacement (Defective discharge gas thermistor input circuit)

Temperature-resistance characteristics of discharge gas thermistor (Th

O-D

)

Thermistor resistance

(kΩ)

80°C]

Thermistor resistance

(kΩ)

80°C]

Defective discharge gas thermistor

Outdoor unit

Red LED Green LED

3 time flashes

1 time flash

MEMO

Mitsubishi FDTN208HEN-S, FDTN258HEN, FDTN208HEP, FDTN258HEN-S, FDTN258HEP Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual