Elektronika SKM25ZD-S, SKM22ZD-S, STM25ZE-S, SRRM25ZE-S, STM35ZE-S User Manual

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(OUTDOOR UNIT) SCM60ZD-S

(INDOOR UNIT) SKM22ZD-S STM25ZE-S SRRM25ZE-S SKM25ZD-S STM35ZE-S SRRM35ZE-S SKM28ZD-S STM50ZE-S SRRM50ZE-S SKM35ZD-S STM60ZE-S SRRM60ZE-S SKM50ZD-S

SCM-ZD (3room)

INVERTER MULTI-SPLIT SYSTEM

ROOM AIR-CONDITIONER[3room]

(Air to air heat pump type)

CONTENTS

5.1 GENERAL INFORMATION ........................................................................ 377

5.1.1 Specific features ................................................................................. 377

5.1.2 How to read the model name ............................................................. 377

5.2 SELECTION DATA ..................................................................................... 378

5.2.1 Specifications ...................................................................................... 378

5.2.2 Range of usage & limitations ............................................................. 386

5.2.3 Exterior dimensions............................................................................ 387

5.2.4 Piping system ...................................................................................... 389

5.2.5 Selection chart .................................................................................... 390

5.3 ELECTRICAL DATA................................................................................... 391

5.3.1 Electrical wiring .................................................................................. 391

5.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............. 395

5.5 APPLICATION DATA ................................................................................. 419

5.5.1 Installation of indoor unit ................................................................... 420

5.5.2 Installation of remote control............................................................. 429

5.5.3 Installation of outdoor unit................................................................. 430

5.5.4 Electrical wiring .................................................................................. 431

5.5.5 Refrigerant piping ............................................................................... 432

5.5.6 Test run and handling instruction ..................................................... 434

5.5.7 Installation of remote control and super link adapter

(SC-AD-E) (Optional parts) ................................................................ 435

5.5.8 Installation of optional parts (Ducted type) ...................................... 442

5.6 MAINTENANCE DATA ............................................................................... 447

5.6.1 Trouble shooting ................................................................................. 447

5.6.2 Servicing .............................................................................................. 456

5.7 REFRIGERANT PIPING INSTALLATION/SERVICING MANUAL

FOR AIR CONDITIONERS USING R410A ................................................ 456

5.1 GENERAL INFORMATION

5.1.1 Specific features

(1) The long piping makes the location of the inside and units flexible.

¡ No need for additional charge of refrigerant : 30m

¡ Maximum piping length : 40m

(2) Connectable indoor capacity

Number of connectable units : 3 units

Total of indoor units (class kW) : 11.0kW

(3) Indoor units are available with 5 capacities.

5 capacities ................ 22, 25, 28, 35, 50, 60

Types ......................... Wall mounted type (SKM).

4-way ceiling cassette type (STM).

Ducted type (SRRM).

(4) Inverter (Frequency converter) for multi-steps power control

¡ Heating / Cooling

The rotational speed of a compressor is changed in step in relation to varying load, to interlock with the indoor and outdoor unit

fans controlled to changes in frequency, thus controlling the power.

¡ Allowing quick heating/cooling operation during start-up period. Constant room temperature by fine-tuned control after the

unit has stabilized.

(5) Fuzzy control

Fuzzy control calculates the amount of variation in the difference between the suction air temperature and the setting temperature

in compliance with the fuzzy rules in order to control the air capacity and the inverter frequency.

(6) Self diagnosis function

We are constantly trying to do better service to our customers by installing such judges that show abnormality of operation as

follows. (See Page 74)

5.1.2 How to read the model name

Example : ST M 25 Z E - S

R410A models

Series No.

Inverter and Heat pump type

Product capacity

Multiple system

Model name

SK : Wall mounted type ST : 4 way ceiling cassette type SRR : Ducted type SC : Outdoor unit

Item

Models

SKM22ZD-S SKM25ZD-S SKM28ZD-S SKM35ZD-S

Cooling capacity W 2200 2500 2800 3500

Heating capacity W 3200 3400 4000 4500

Noise level

Cooling

Hi : 37 Me : 30 Lo : 23

Hi : 38 Me : 31 Lo : 24 Hi : 39 Me : 32 Lo : 25

Hi : 53 Hi : 54 Hi : 55

Heating

Hi : 39 Me : 33 Lo : 27

Hi : 40 Me : 34 Lo : 28 Hi : 41 Me : 35 Lo : 29

Hi : 55 Hi : 56 Hi : 57

Exterior dimensions

Height × Width × Depth

mm 250 × 815 × 249

Color Cool white

Net weight kg 9.0

Air handling equipment

Fan type & Q’ty

Tangential fan × 1

Motor W 16

Cooling 8.0 8.2 8.4

Air flow (at high)

Heating

CMM

8.7 9.0 9.2

Air filter, Q’ty

Polypropylene net × 2 (Washable)

Operation switch Wireless-Remote control

Room temperature control M.C thermostat

Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)

Safety equipment

O.D mm (in)

φ 6.35 (1/4″)

φ 9.52 (3/8″)

Connecting method Flare connecting

Attached length of piping Liquid line : 0.4m Gas line : 0.33m

Insulation Necessary (Both Liquid & Gas lines)

Drain hose Connectable

Accessories (including)

Mounting kit, Clean filter (Natural enzyme filter × 1, Photocatalytic washable deodorizing filter × 1)

Optional parts —

Outdoor unit to be combined SCM60ZD-S

5.2 SELECTION DATA

5.2.1 Specifications

(1) Indoor unit

Models SKM22ZD-S, 25ZD-S, 28ZD-S, 35ZD-S

(2) Capacity indicated is the rated capacity with one unit operating under ISO-T1 standards conditions.

Refrigerant piping

Liquid line

Gas line

Frost protection, Serial error protection

Fan motor error protection

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

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612

Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612

Sound level

Power level

Sound level

Power level

Item

Model

SKM50ZD-S

Cooling capacity W 5000

Heating capacity W 5800

Noise level

Cooling

Sound level

Hi : 47 Me : 36 Lo : 23

Power level Hi : 62

Noise level

Heating

Sound level Hi : 48 Me : 37 Lo : 27

Power level Hi : 63

Exterior dimensions

Height × Width × Depth

mm 250 × 815 × 249

Color Cool white

Net weight kg 9.5

Air handling equipment

Fan type & Q’ty

Tangential fan × 1

Motor W 29

Cooling 11

Air flow (at high)

Heating

CMM

13.9

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

Operation switch Wireless-Remote control

Room temperature control M.C thermostat

Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)

Safety equipment

O.D mm (in)

φ 6.35 (1/4″)

φ 12.7 (1/2″)

Connecting method Flare connecting

Attached length of piping Liquid line : 0.4m Gas line : 0.33m

Insulation Necessary (Both Liquid & Gas lines)

Drain hose Connectable

Accessories (including)

Mounting kit, Clean filter (Natural enzyme filter × 1, Photocatalytic washable deodorizing filter × 1)

Optional parts —

Outdoor unit to be combined SCM60ZD-S

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27ºC19ºC35ºC24ºC ISO-T1, JIS C9612

Heating 20ºC – 7ºC6ºC ISO-T1, JIS C9612

(2) Capacity indicated is the rated capacity with one unit operating under ISO-T1 standards conditions.

Refrigerant piping

Liquid line

Gas line

Frost protection, Serial error protection

Fan moter error protection

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

Model SKM50ZD-S

Sound level

Power level

Sound level

Power level

Item

Models

STM25ZE-S STM35ZE-S STM50ZE-S STM60ZE-S

Cooling capacity W 2500 3500 5000 6000

Heating capacity W 3400 4500 5800 6800

Noise level

Cooling

35 38 40 47

51 54 56 63

Heating

35 38 40 47

51 54 56 63

Exterior dimensions

Main unit 248 × 570 × 570

Height × Width × Depth

Panel

35 × 700 × 700

Color

–

Net weight

Main unit

14 14.5

Panel 3.5

Air handling equipment

Fan type & Q’ty

Turbo fan × 1

Motor W 40

Cooling 8.0 9.0 10.0 13.0

Air flow (at high)

Heating

CMM

9.0 10.0 11.0 14.0

Air filter, Q’ty

Long life filter

× 1

(Washable)

Operation switch Wireless-Remote control

Room temperature control M.C thermostat

Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)

Safety equipment

O.D mm (in)

φ 6.35 (1/4″)

φ 9.52 (3/8″) φ 12.7 (1/2″)

Connecting method Flare connecting

Attached length of piping —

Insulation Necessary (Both Liquid & Gas lines)

Drain hose Connectable

Accessories (including) Mounting kit

Optional parts Wired remote control

Outdoor unit to be combined SCM60ZD-S

Models STM25ZE-S, 35ZE-S, 50ZE-S, 60ZE-S

(2) Capacity indicated is the rated capacity with one unit operating under ISO-T1 standards conditions.

Refrigerant piping

Liquid line

Gas line

Frost protection, Serial error protection

Fan motor error protection, Drain error protection

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

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27ºC19ºC35ºC24ºC ISO-T1, JIS C9612

Heating 20ºC – 7ºC6ºC ISO-T1, JIS C9612

Sound level

Power level

Sound level

Power level

Models SRRM25ZE-S, 35ZE-S, 50ZE-S, 60ZE-S

Item

Models

SRRM25ZE-S SRRM35ZE-S SRRM50ZE-S SRRM60ZE-S

Cooling capacity W 2500 3500 5000 6000

Heating capacity W 3400 4500 5800 6800

Noise level

Cooling

38 40 46 49

53 55 60 63

Heating

39 41 46 49

54 56 60 63

Exterior dimensions

Height × Width × Depth

mm 230 × 740 × 455

Color —

Net weight kg 22.0 23.0

Air handling equipment

Fan type & Q’ty

Centrifugal fan × 2

Motor W 51

Cooling 8.5 9.0 10.5 12.5

Air flow (at high)

Heating

CMM

10.0 11.0 13.0 15.0

Air filter, Q’ty

Polypropylene net × 1

Operation switch Wireless-Remote control

Room temperature control M.C thermostat

Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)

Safety equipment

O.D mm (in)

φ 6.35 (1/4″)

φ 9.52 (3/8″) φ 12.7 (1/2″)

Connecting method Flare connecting

Attached length of piping

–

Insulation Necessary (Both Liquid & Gas lines)

Drain hose Connectable

Accessories (including) Mounting kit

Optional parts Wired remote control

Outdoor unit to be combined SCM60ZD-S

(2) Capacity indicated is the rated capacity with one unit operating under ISO-T1 standards conditions.

Refrigerant piping

Liquid line

Gas line

Frost protection, Serial error protection

Fan motor error protection, Drain error protection

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

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27ºC19ºC35ºC24ºC ISO-T1, JIS C9612

Heating 20ºC – 7ºC6ºC ISO-T1, JIS C9612

(2) Outdoor unit

Model SCM60ZD-S

Item

Model

SCM60ZD-S

Cooling capacity W 6000 (1400~6900)

Heating capacity W 7000 (750~7200)

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

Power consumption

Cooling

1860 (400~3000)

Heating 1740 (320~2700)

Running current

Cooling 8.5/8.2/7.8

Heating

8.0/7.6/7.3

Sound level Cooling : 48/48/50 Heating : 50/50/52

Noise level

Power level

Cooling : 63/63/65 Heating : 65/65/67

Exterior dimensions

Height × Width × Depth

640 × 850 × 290

Color Stucco white

Net weight kg 51

Refrigerant equipment

Compressor type & Q’ty

TNB220FLBM1 [Twin rotary type] × 1

Motor kW 1.3

Starting method Direct start

Refrigerant control Capillary tubes + Electronic expansion valve

Refrigerant kg R410A 2.2 (Pre-charged up to the piping length of 30m)

Refrigerant oil R 0.67 (MEL56)

Air handling equipment

Fan type & Q’ty

Propeller fan × 1

Motor W 45

Air flow (at high) CMM 42

Shock & vibration absorber Rubber (for compressor)

Safety equipment

Size × Core × Number mm (in)

Liquid line: φ 6.35 (1/4″) × 3

Gas line: φ 9.52 (3/8″) × 3

Connecting method Flare connecting

Attached length piping —

Insulation Necessary (Both Liquid & Gas lines)

Power source supply Terminal block (Screw fixing type)

Size × Core number 1.5 mm2 × 4 cores (Including earth cable) × 3

Connecting method Terminal block (Screw fixing type)

Accessories (included)

Union : (φ 9.52 / φ 12.7) × 2

Installation sheet, Manual instruction

SKM22, 25, 28, 35, 50 type

Indoor units to be combined STM25, 35, 50, 60 type

SRRM25, 35, 50, 60 type

Compressor overheat protection, Overcurrent protection

Serial signal error protection

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

Refrigerant piping

Connection wiring

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27ºC19ºC35ºC24ºC ISO-T1, JIS C9612

Heating 20ºC – 7ºC6ºC ISO-T1, JIS C9612

(2) The values for capacity and power consumption shown in a range ( ) indicate the minimum and maximum of the range.

(3) If the piping length exceeds 30 m, additional charging is required. (20g/m)

(3) Operation data

¡ The combinations of the indoor units is indicated by numbers. They are read as follows.

(Example) SKM22ZD-S / 22 SKM35ZD-S / 35

¡ The capacity of the indoor units is shown by rooms. If this exceeds the maximum capacity of the outdoor unit, the demand

capacity will be proportionally distributed.

¡ If units are to be combined, use the table below to make the proper selection.

Model SCM60ZD-S

(a) Heating

room

22 3.2 - - 0.75 3.2 3.4 320 1100 1200 5.1 4.8 4.6

25 3.4 - - 0.75 3.4 3.6 320 1200 1300 5.5 5.3 5.1

28 4.0 - - 0.75 4.0 4.2 320 1450 1550 6.7 6.4 6.1

35 4.5 - - 0.75 4.5 4.6 320 1750 1800 8.0 7.7 7.4

50 5.8 - - 0.75 5.8 6.2 320 2100 2400 9.6 9.2 8.8

11.9

10.3

11.4

10.1

10.9

60 6.8 - - 0.75 6.8 6.9 320 2600 2650

room

22+22 2.55 2.55 - 1.1 5.1 6.5 330 1450 2350 6.7 6.4 6.1

22+25 2.48 2.82 - 1.1 5.3 6.5 330 1500 2350 6.9 6.6 6.3

22+28 2.55 3.25 - 1.1 5.8 6.5 330 1700 2400 7.8 7.5 7.2

22+35 2.35 3.75 - 1.1 6.1 6.6 330 1900 2500 8.7 8.3 8.0

22+50 2.02 4.58 - 1.2 6.6 6.8 360 2150 2700 9.9 9.4 9.0

9.9 9.5

10.6 9.7

22+60 1.80 4.90 - 1.2 6.7 6.8 360 2250 2700

25+25 2.75 2.75 - 1.1 5.5 6.5 330 1600 2350 7.3 7.0 6.7

25+28 2.78 3.12 - 1.1 5.9 6.5 330 1800 2400 8.3 7.9 7.6

25+35 2.63 3.68 - 1.1 6.3 6.6 330 2000 2500 9.2 8.8 8.4

25+50 2.23 4.47 - 1.2 6.7 6.8 360 2250 2700 10.3 9.9 9.5

25+60 1.97 4.73 - 1.2 6.7 6.8 360 2300 2700

28+28 3.20 3.20 - 1.1 6.4 6.6 330 2050 2450 9.4 9.0 8.6

28+35 2.98 3.72 - 1.1 6.7 6.7 330 2200 2550 10.1 9.7 9.3

28+50 2.41 4.29 - 1.2 6.7 6.8 360 2400 2700 11.0 10.5 10.1

11.2 10.8 10.3

28+60 2.13 4.57 - 1.2 6.7 6.8 360 2450 2700

35+35 3.35 3.35 - 1.1 6.7 6.7 330 2350 2600 10.8 10.3 9.9

35+50 2.76 3.94 - 1.2 6.7 6.8 360 2550 2700 11.7 11.2 10.7

11.9 11.4 10.9

35+60 2.47 4.23 - 1.2 6.7 6.8 360 2600 2700

50+50 3.35 3.35 - 1.5 6.7 6.8 420 2600 2700 11.9 11.4 10.9

12.2 11.6 11.2

50+60 3.05 3.65 - 1.5 6.7 6.8 420 2650 2700

room

22+22+22

2.23 2.23 2.23 1.7 6.7 7.2 440 1650 2700 7.6 7.2 6.9

22+22+25

2.20 2.20 2.50 1.7 6.9 7.2 440 1750 2700 8.0 7.7 7.4

22+22+28

2.14 2.14 2.72 1.7 7.0 7.2 440 1800 2700 8.3 7.9 7.6

22+22+35

1.95 1.95 3.10 1.7 7.0 7.2 440 1850 2700 8.5 8.1 7.8

22+22+50

1.64 1.64 3.72 1.9 7.0 7.2 500 1740 2700 8.0 7.6 7.3

9.0 8.6 8.2

22+22+60

1.50 1.50 4.10 1.9 7.1 7.2 500 1950 2700

22+25+25

2.14 2.43 2.43 1.7 7.0 7.2 440 1750 2700 8.0 7.7 7.4

22+25+28

2.05 2.33 2.61 1.7 7.0 7.2 440 1850 2700 8.5 8.1 7.8

22+25+35

1.88 2.13 2.99 1.7 7.0 7.2 440 1950 2700 9.0 8.6 8.2

22+25+50

1.61 1.83 3.66 1.9 7.1 7.2 500 2050 2700 9.4 9.0 8.6

9.4 9.0 8.6

22+25+60

1.46 1.66 3.98 1.9 7.1 7.2 500 2050 2700

22+28+28

1.97 2.51 2.51 1.7 7.0 7.2 440 1950 2700 9.0 8.6 8.2

22+28+35

1.84 2.34 2.92 1.7 7.1 7.2 440 2050 2700 9.4 9.0 8.6

22+28+50

1.56 1.99 3.55 1.9 7.1 7.2 500 2100 2700 9.6 9.2 8.8

9.6 9.2 8.8

22+28+60

1.42 1.81 3.87 1.9 7.1 7.2 500 2100 2700

22+35+35

1.70 2.70 2.70 1.7 7.1 7.2 440 2150 2700 9.9 9.4 9.0

10.1 9.7 9.3

22+35+50

1.46 2.32 3.32 1.9 7.1 7.2 500 2200 2700

25+25+25

2.33 2.33 2.33 1.7 7.0 7.2 440 1800 2700 8.3 7.9 7.6

25+25+28

2.24 2.24 2.51 1.7 7.0 7.2 440 1900 2700 8.7 8.3 8.0

Indoor unit combinaton

Cooling capacity (kW)

Power cosumption (W) Standard current (kW)

Roomcooling capacity (kW) Total capacity (kW)

Min. Standard Max. 220V 230V 240V

B room C room

Min. Standard Max.

A room

25+25+35

2.06 2.06 2.88 1.7 7.0 7.2 440 2000 2700 9.2 8.8 8.4

25+25+50

1.78 1.78 3.55 1.9 7.1 7.2 500 2050 2700 9.4 9.0 8.6

9.4 9.0 8.6

25+25+60

1.61 1.61 3.87 1.9 7.1 7.2 500 2050 2700

25+28+28

2.19 2.45 2.45 1.7 7.1 7.2 440 2000 2700 9.2 8.8 8.4

25+28+35

2.02 2.26 2.82 1.7 7.1 7.2 440 2100 2700 9.6 9.2 8.8

25+28+50

1.72 1.93 3.45 1.9 7.1 7.2 500 2250 2700 10.3 9.9 9.5

25+35+35

1.87 2.62 2.62 1.7 7.1 7.2 440 2200 2700 10.1 9.7 9.3

10.3 9.9 9.5

25+35+50

1.61 2.26 3.23 1.9 7.1 7.2 500 2250 2700

28+28+28

2.37 2.37 2.37 1.7 7.1 7.2 440 2150 2700 9.9 9.4 9.0

28+28+35

2.18 2.18 2.73 1.7 7.1 7.2 440 2200 2700 10.1 9.7 9.3

28+28+50

1.88 1.88 3.35 1.9 7.1 7.2 500 2350 2700 10.8 10.3 9.9

28+35+35

2.03 2.54 2.54 1.7 7.1 7.2 440 2300 2700 10.6 10.1 9.7

35+35+35

2.37 2.37 2.37 1.7 7.1 7.2 440 2400 2700 11.0 10.5 10.1

room

Indoor unit combinaton

Cooling capacity (kW)

Power cosumption (W) Standard current (kW)

Roomcooling capacity (kW) Total capacity (kW)

Min. Standard Max. 220V 230V 240V

B room C room

Min. Standard Max.

A room

(b) Cooling

room

22 2.2 - - 1.4 2.2 2.3 400 720 750 3.3 3.2 3.0

25 2.5 - - 1.4 2.5 2.6 400 800 830 3.7 3.5 3.4

28 2.8 - - 1.4 2.8 3.0 400 950 1050 4.4 4.2 4.0

35 3.5 - - 1.4 3.5 3.6 400 1300 1350 6.0 5.7 5.5

50 5.0 - - 1.4 5.0 5.1 400 2200 2250 10.1 9.7 9.3

60 6.0 - - 1.4 6.0 6.1 400 2700 2800

room

22+22 2.20 2.20 - 1.5 4.4 4.6 410 1450 1650 6.7 6.4 6.1

22+25 2.20 2.50 - 1.5 4.7 4.9 410 1600 1750 7.3 7.0 6.7

22+28 2.20 2.80 - 1.5 5.0 5.2 410 1720 1900 7.9 7.6 7.2

22+35 2.05 3.25 - 1.5 5.3 5.4 410 2100 2150 9.6 9.2 8.8

22+50 1.86 4.24 - 1.6 6.1 6.4 440 2550 2750 11.7 11.2 10.7

12.9 12.3 11.8

12.4 11.9 11.4

22+60 1.74 4.76 - 1.6 6.5 6.6 440 2800 2880

25+25 2.50 2.50 - 1.5 5.0 5.2 410 1720 1900 7.9 7.6 7.2

25+28 2.50 2.80 - 1.5 5.3 5.4 410 1850 1950 8.5 8.1 7.8

25+35 2.42 3.38 - 1.5 5.8 5.9 410 2200 2300 10.1 9.7 9.3

25+50 2.10 4.20 - 1.6 6.3 6.5 440 2720 2850 12.5 11.9 11.4

13.2 12.6 12.1

25+60 1.94 4.66 - 1.6 6.6 6.6 440 2880 2880

28+28 2.80 2.80 - 1.5 5.6 5.7 410 2000 2100 9.2 8.8 8.4

28+35 2.71 3.39 - 1.5 6.1 6.2 410 2420 2500 11.1 10.6 10.2

28+50 2.37 4.23 - 1.6 6.6 6.6 440 2880 2880 13.2 12.6 12.1

28+60 2.10 4.50 - 1.6 6.6 6.6 440 2880 2880

35+35 3.30 3.30 - 1.5 6.6 6.6 410 2880 2880 13.2 12.6 12.1

35+50 2.72 3.88 - 1.6 6.6 6.6 440 2880 2880 13.2 12.6 12.1

35+60 2.43 4.17 - 1.6 6.6 6.6 440 2880 2880

50+50 3.30 3.30 - 1.9 6.6 6.6 500 2880 2880 13.2 12.6 12.1

50+60 3.00 3.60 - 1.9 6.6 6.6 500 2880 2880

Cooling capacity(kW)

220V 230V 240V

Indoor unit combinaton

Roomcooling capacity (kW) Total capacity (kW)

Power cosumption (W) Standard current (kW)

Min. Standard Max.

B room C room

Min. Standard Max.

A room

room

22+22+22

1.70 1.70 1.70 1.9 5.1 6.8 620 1470 2950 6.7 6.5 6.2

22+22+25

1.66 1.66 1.88 1.9 5.2 6.8 620 1500 2950 6.9 6.6 6.3

22+22+28

1.59 1.59 2.02 1.9 5.2 6.9 620 1500 3000 6.9 6.6 6.3

22+22+35

1.50 1.50 2.39 1.9 5.4 6.9 620 1600 3000 7.3 7.0 6.7

22+22+50

1.40 1.40 3.19 2.1 6.0 6.9 680 1860 3000 8.5 8.2 7.8

9.2 8.8 8.4

22+22+60

1.29 1.29 3.52 2.1 6.1 6.9 680 2000 3000

22+25+25

1.59 1.81 1.81 1.9 5.2 6.9 620 1500 3000 6.9 6.6 6.3

22+25+28

1.55 1.77 1.98 1.9 5.3 6.9 620 1550 3000 7.1 6.8 6.5

22+25+35

1.48 1.68 2.35 1.9 5.5 6.9 620 1620 3000 7.4 7.1 6.8

22+25+50

1.36 1.55 3.09 2.1 6.0 6.9 680 1860 3000 8.5 8.2 7.8

22+25+60

1.27 1.45 3.48 2.1 6.2 6.9 680 2000 3000

22+28+28

1.52 1.94 1.94 1.9 5.4 6.9 620 1600 3000 7.3 7.0 6.7

22+28+35

1.45 1.84 2.31 1.9 5.6 6.9 620 1650 3000 7.6 7.2 6.9

22+28+50

1.32 1.68 3.00 2.1 6.0 6.9 680 1860 3000 8.5 8.2 7.8

9.4 9.0 8.6

22+28+60

1.26 1.60 3.44 2.1 6.3 6.9 680 2050 3000

22+35+35

1.39 2.21 2.21 1.9 5.8 6.9 620 1750 3000 8.0 7.7 7.4

22+35+50

1.27 2.03 2.90 2.1 6.2 6.9 680 2000 3000

25+25+25

1.77 1.77 1.77 1.9 5.3 6.9 620 1550 3000 7.1 6.8 6.5

25+25+28

1.73 1.73 1.94 1.9 5.4 6.9 620 1600 3000 7.3 7.0 6.7

25+25+35

1.65 1.65 2.31 1.9 5.6 6.9 620 1650 3000 7.6 7.2 6.9

25+25+50

1.50 1.50 3.00 2.1 6.0 6.9 680 1860 3000 8.5 8.2 7.8

9.4 9.0 8.6

25+25+60

1.43 1.43 3.44 2.1 6.3 6.9 680 2050 3000

25+28+28

1.70 1.90 1.90 1.9 5.5 6.9 620 1620 3000 7.4 7.1 6.8

25+28+35

1.62 1.81 2.27 1.9 5.7 6.9 620 1700 3000 7.8 7.5 7.2

25+28+50

1.48 1.66 2.96 2.1 6.1 6.9 680 2000 3000 9.2 8.8 8.4

25+35+35

1.55 2.17 2.17 1.9 5.9 6.9 620 1800 3000 8.3 7.9 7.6

9.4 9.0 8.6

25+35+50

1.43 2.00 2.86 2.1 6.3 6.9 680 2050 3000

28+28+28

1.87 1.87 1.87 1.9 5.6 6.9 620 1650 3000 7.6 7.2 6.9

28+28+35

1.78 1.78 2.23 1.9 5.8 6.9 620 1750 3000 8.0 7.7 7.4

28+28+50

1.64 1.64 2.92 2.1 6.2 6.9 680 2100 3000 9.6 9.2 8.8

28+35+35

1.69 2.11 2.11 1.9 5.9 6.9 620 1800 3000 8.3 7.9 7.6

35+35+35

2.07 2.07 2.07 1.9 6.2 6.9 620 2100 3000 9.6 9.2 8.8

Cooling capacity(kW)

220V 230V 240V

Indoor unit combinaton

Roomcooling capacity (kW) Total capacity (kW)

Power cosumption (W) Standard current (kW)

Min. Standard Max.

B room C room

Min. Standard Max.

A room

5.2.2 Range of usage & limitations

Indoor intake air temperature (Upper, lower limits)

Indoor units that can be used in combination

Length for one indoor unit

Total length for all rooms

Max. 25m

Max. 40m

11.0kW

2 to 3 units

SCM60ZD-S

Refer to the selection chart.

Compressor stop/start frequency

Power source voltage

1 cycle time

Stop time

Voltage fluctuation

Voltage drop during start

Interval unbalance

Difference in height between indoor units (C)

Within ±3% of rated voltage

Within ±15% of rated voltage

Within ±10% of rated voltage

3 min or more

6 min or more (from stop to stop or from start to start)

Max. 25m

Max. 15m

Max. 10m

Outdoor air temperature (Upper, lower limits)

Number of connected units

Total of indoor Units (class kW)

Difference in height between indoor and outdoor units

When above outdoor unit (B)

When below outdoor unit (A)

Item

Model

VIEW A

14.5

788

815

250

117.5

580 117.5

148.5

216.5216.5

8.2

44.5

236.1

5.7

450

67.5

42.7

47.2

175

44.5

216.5216.5

148.5

53.5

Piping for Gas

Drain hose 540 (ø16)

Piping for Liquid 465.1 (ø6.35)

Piping hole (ø65)

( )

22,25,28,35: ø9.52 50: ø12.7

397.1

Piping hole right(left)

Terminal block

249

150

Remote controller

5.2.3 Exterior dimensions

(1) Indoor unit

Models SKM22ZD-S, 25ZD-S, 28ZD-S, 35ZD-S, 50ZD-S

Unit : mm

Models STM25ZE-S, 35ZE-S, 50ZE-S, 60ZE-S

Hanging bolt pitch 530

Celling opening 660 (For conventional celling)

Hanging fixture

Drain hose (accessory) To be installed at site

Control box

Hanging bolt pitch 530

Air outlet

Air intake

PANEL

*Please arrange VP25 connector sockets on the installer's part.

350

319

104

45 or

541

700

413

43202

570

243

196

250

137

197

Mark Description

Model 25,35ZE-S 50,60ZE-S

Gas pipe connecting port ø 9.52(Flare) ø 12.7(Flare)

Liquid pipe connecting port ø 6.35(Flare)

Drain line tube connecting port VP25*

Power intake

Hanging bolt (M10 or M8)

Models SRRM25ZE-S, 35ZE-S, 50ZE-S, 60ZE-S

(2) Outdoor unit Model SCM60ZD-S

42.7

Drain holes

Elogated hole (2-12X16)

Terminal block

Gas line service valve C Unit (ø9.52)

Liquid line service

valve C Unit (ø6.35)

Liquid line service valve B Unit (ø6.35)

Gas line service valve B Unit (ø9.52)

Liquid line service valve A Unit (ø6.35)

Gas line service valve A Unit (ø9.52)

Ground terminal

314

850

203.1 510 136.9

476

286.4

290

49.6

43.5

328

100.3

67.9

640

124

34.6

20º

Unit : mm

Controller

Terminal block

Air outlet

ø 4 × 8(Holes for tapping screws)

Air inlet

Hanging bolt

(M8 × 4)

35 670 (Suspension bolts pitch)

740

515 (Suspension bolts pitch)

455 3030

325

455

106740

150

78135

30 230 11 255

236

105

Drain hose

(Connection opening diameter ø16)

220 90 220 105

3014855

1917044

100 540 100

Mark

Description

Model 25,35ZE-S 50,60ZE-S

Gas pipe connecting port ø9.52(Flare) ø12.7(Flare)

Liquid pipe connecting port

ø6.35(Flare)

Gas line

Liquid line

(ø9.52 or ø12.7)

(ø6.35)

EEVA

Strainer

EEVB

EEVC

(ø9.52 or ø12.7)

Service valve (Gas)

Outdoor Unit

Indoor Unit

Sensor

(Th

I-

)

Heat exchanger

Sensor

(Th

I-A

)

Sensor

(Th

I-R1

)

Sensor

(Th

O-D

)

Sensor

(Th

O-A

)

Accumlator

Muffler

Sensor

(Th

o-C

)

Service valve

(Liquid)

Electronic

expansion valve

Gas line 22, 25, 28, 35 type:

ø9.52

50, 60 type :

ø12.7

Capillary

tube

Compressor

Check joint

4way valve

Heating

Cooling

Discharge

Suction

Receiver

Sensor

(Th

-R)

Heat exchanger

5.2.4 Piping system

Model SCM60ZD-S

5.2.5 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

ISO-T1 Standard ConditionOutdoor air W.B. temperature °C W.B.

010-10 -5 5

14 16 18 20 22

27 25

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

ISO-T1 Standard ConditionIndoor air W.B. temperature °C W.B.

Heating

Cooling

Applicable range

Coefficient of cooling &

Heating capacity in

relation to temperature

Cooling operation

Outdoor air D.B.

temperature

°C D.B.

Heating operation

Indoor air D.B.

temperature

°C D.B.

Air inlet temperature of

outdoor unit in ºCWB

Adjustment coefficient

-10

0.95-90.94-70.93-50.91-30.88-10.8610.8730.9251.00

Piping length [m]

Cooling

Heating

1.0

0.99

1.0

0.975

1.0

0.965

1.0

0.95

1.0

(2) 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 piping length between the indoor and outdoor

units.

(3) Correction relative to frosting on outdoor heat exchanger during heating

In additions to the foregoing corrections (1), (2) the heating capacity needs to be adjusted also with respect to the frosting on the

outdoor heat exchanger.

5.3 ELECTRICAL DATA

Meaning of marks

• Outdoor Unit

• Indoor Unit

ZNR

Parts name

Fan motor

Capacitor (for FM

)

Flap motor

Transformer

Varistor

Fuse

Symbol

-A

I-R1

ThI-R

Parts name

Drain motor

Float switch

Sensor (room temp.)

Sensor (indoor H.X temp.)

Symbol

CFO

DS1

Q11

Parts name

Compressor motor

Fan motor

Capacitor (for FM

Reactor

Diode stack

Power transistor

Symbol

EEVA ~ D

20S

Tho-A

Tho-R

Tho-D

Tho-C

Parts name

Electronic expansion valve

4 way valve (coil)

Sensor (outdoor air temp.)

Sensor (outdoor H.X temp.)

Sensor (discharge pipe temp.)

Sensor (suction pipe temp.)

Symbol

5.3.1 Electrical wiring

(1) Indoor unit

Models SKM22ZD-S, 25ZD-S, 28ZD-S, 35ZD-S

CNW

HEAT EXCHANGER

Power line (Outdoor unit)

CNM

CNU

CNC

(250V 3.15A)

Printed circuit

board

52C-4

ZNR

IC8

2/N

Y/GN

CNB

CNE

CNG CNF

Back up switch

ThI-A ThI-R

ThI-R

Display

Wireless

R-Amp

Black Brown Red White Yellow/Green

BK BR RD WH Y/GN

Color symbol

HEAT EXCHANGER

Power line (Outdoor unit)

CNM

(250V 3.15A)

Printed circuit

board

52C-4

ZNR

2/N

Y/GN

CNU

Y/GN

CNE

CNG CNF

Back up switch

ThI-A ThI-R

ThI-R

Display

Wireless

R-Amp

Black

Brown Red White

Yellow/Green

BR RD WH

Blue

Yellow

Y Y/GN

Color symbol

Model SKM50ZD-S

Models STM25ZE-S, 35ZE-S, 50ZE-S, 60ZE-S

Models SRRM25ZE-S, 35ZE-S, 50ZE-S, 60ZE-S

Display

Wireless

R-amp

Display

Wireless

R-amp

Printed circuit

board

(250V 3.15A)

ZNR

Printed circuit

board

(Optional parts)

(Optional

parts)

(250V 3.15A)

ZNR

13 546

2/N

Power line

(Outdoor unit)

R/L

S/N

Control

box

Control

box

YXZXYZ

Wired remote control

(Optional parts)

Power line

(Outdoor unit)

Wired remote control

(Optional parts)

CNG

CNP

CNE

CNQ

CNM

CNU

13 546

CNC

2/N

S/N

R/L

CNB

YXZXYZ

ThI-A ThI-R1ThI-R

BKRDWH

Y/G

BKRDWH

Y/G

WH BK

Color symbol

Y/G

Black Blue

Yellow/Green

WH White

RD Red Y Yellow

Color symbol

BL OR

Y/G

Black Blue Orange

Yellow/Green

WH White

RD Red Y Yellow

CNP

CNE

CNG

CNQ

CNM

CNU

CNB

SWITCHING

POWER CIRCUIT

EEV-C

L-1

N-1

20S

CNI

RAM DATA

URD

PWB ASSY(POWER) PWB2

250V 20A

200V 2A

EEV-BEEV-A

Tho-D

Tho-A

Tho-R

Tho-C

HEATER

250V 20A

EARTH

1122

CNO

CNP

CNQ

CNB CNC

CND

CNJ CNK CNL

CNG

P_1N_1

P_1

123456 123456 123456

CNN CNH

1234567891011121312345

12345 12345678910111213

PWB ASSY(CAPACITOR) PWB3

PWB ASSY(CPU) PWB1

DC-P

DC-N

C1 C2 C3 C4

IC12 Q11

BK RD

L-OUT2

AC.L

AC.N

N-OUT2

CNG

CNH

DS1

AF-L2

N_3

AF-L1

OR OR

Y/G

Y/G Y/G

Power source

1 Phase

220/230/240V

Unit

Black

Red

White

Yellow/Green

Blue

Yellow

Brown

Gray

Orange

Y/GN

Color symbol

LED4

Unit A

LED5

ERROR

LED2

Unit C

LED3

Unit B

FMo

CNS

CAP1

CAP2

COM

CFO

(2) Outdoor unit

Model SCM60ZD-S

MED

AUTO

HI POWER

ECONO

ON OFF

AM PM

HI POWER

TEMP

ECONO

AIR FLOW

CANCEL

ON OFF

RESERVE

TIMER

TIME

ACL

FAN SPEED

MODE

MED

AUTO

TIME

OFF

HI POWER

ECONO

ON OFF

AM PM

FAN SPEED button

Each time the button is pushed, the indicator is switched over in turn.

• The above illustration shows all controls, but in practice

only the relevant parts are shown.

OPERATION MODE select button

Each time the button is pushed, the indicator is switched over in turn.

AIR FLOW button

This button changes the flap mode. When pressed, this button changes the mode in the following order:

ON/OFF button

Press for starting operation, press again for stopping.

HI POWER button

This button changes the HI POWER mode.

ECONOMY button

This button changes the ECONOMY mode.

RESET switch

Switch for resetting microcomputer.

ON TIMER button

This button selects ON TIMER operation.

Clock switch

This switch for setting the clock.

OFF TIMER button

This button selects OFF TIMER operation.

TEMPERATURE button

This button sets the room temperature. (This button changes the present time and

TIMER time.)

CANCEL button

This button cancels the ON timer and OFF timer.

RESERVE button

This button sets the present time and TIMER time.

S Indication section

OPERATION MODE indicator

Indicates selected operation with lamp.

[

(Auto) • (Cool) • (Heat) • (Dry)]

TEMPERATURE indicator

Indicates set temperature. (Does not indicate temperature when operation

mode is on AUTO)

FAN SPEED indicator

Indicates set air flow rate with lamp.

AIR FLOW indicator

Shows selected flap mode.

HI POWER MODE indicator

Indicates during Hi power mode operation.

ECONOMY MODE indicator

Indicates during economy mode operation.

ON TIMER indicator

Indicates during ON TIMER operation.

Clock indicator

Indicates present time or timer setting time.

OFF TIMER indicator

Indicates during OFF TIMER operation.

(a) Wireless remote control

Models All models

S Operation section

(Air scroll) (Swing)

5.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

(1) Operation control function by remote control switch

This button is not used for SRRM-ZE series. (Air flow direction adjustment can not be performed.)

(Flap stopped)

(b) Wired remote control (Optional parts)......STM, SRRM only

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

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

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

Pull the cover downward to open it.

Weekly timer display

Displays the settings of the weekly timer.

[Vent Indicator]

Indicates operation in the Ventilation mode.

Operation/Stop switch

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

MODE switch

This switch is used to switch between operation modes.

Operation setting display area

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

Operation/Check indicator light

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

FAN SPEED switch

This switch is used to set the airflow volume. (AUTO, HI POWER or ECONO cannot be selected.)

SET switch

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

[RESET switch]

Press this switch while making settings to go back to the previous operation. This switch is also used to reset the

FILTER CLEANING message display.

(Press this switch after cleaning the air filter.)

Central control display

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

Timer operation display

Displays the settings related to timer operation.

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

Displays the number of the connected air conditioning system.

[CHECK switch]

This switch is used at servicing.

[TEST switch]

This switch is used during test operation.

Temperature setting switches

These switches are used to set

the temperature of the room.

[VENT switch]

Switch that operates the connected ventilator.

Timer setting switches

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

TIMER switch

This switch is used to select a timer mode. (The comfortable timer cannot be selected.)

[GRILL switch]

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

LOUVER switch

This switch is used to operate/stop the swing louver. This button is not used for SRRM-ZE series. (Air flow direction adjustment can not be performed.)

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

Note (1) The STM, SRRM models don't support the switches and functions displayed in [ ].

RUN (HOT KEEP) light (green)

• Illuminates during operation.

• Blinks at air flow stop due to the ‘HOT KEEP’.

ECONOMY light (orange)

Illuminates during ECONOMY operation.

TIMER light (yellow)

Illuminates during TIMER operation.

HI POWER light (green)

Illuminates during HI POWER operation.

Models STM25ZE-S, 35ZE-S, 50ZE-S, 60ZE-S

Models SRRM25ZE-S, 35ZE-S, 50ZE-S, 60ZE-S

RUN (HOT KEEP) light (green)

• Illuminates during operation.

• Blinks at air flow stop due to the ‘HOT KEEP’.

TIMER light (yellow)

Illuminates during TIMER operation.

RUN (HOT KEEP) light (green)

• Illuminates during operation.

• Blinks at air flow stop due to the ‘HOT KEEP’.

ECONOMY light (orange)

Illuminates during ECONOMY operation.

TIMER light (yellow)

Illuminates during TIMER operation.

HI POWER light (green)

Illuminates during HI POWER operation.

ECONOMY light (orange)

Illuminates during ECONOMY operation.

HI POWER light (green)

Illuminates during HI POWER operation.

Models SKM22ZD-S, 25ZD-S, 28ZD-S, 35ZD-S, 50ZD-S

(2) Unit ON/OFF button

When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn

the unit on and off.

(a) Operation

Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off.

(b) Details of operation

The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by

sensor), whether to go into the cooling, thermal dry or heating modes.

Function

Room temperature Flap

Operation mode

setting

Fan speed

(SKM, STM only)

Timer switch

Cooling About 25ºC

Thermal dry About 25ºC Auto Auto Continuous

Heating About 26ºC

Unit ON/OFF button

¡ SKM model

¡ STM model

(3) Drain motor forced operation functions (STM, SRRM only)

(a) Operation

• When the float switch detects drain water, please use the wireless remote control to set the operation mode to "heating",

set the temperature to 30°C, and set the timer to continuous operation.

• When the float switch detects drain water, press the TEST switch on wired remote control for 3 seconds.

(b) Detail of operation

Sets the decision speed to 0 rps, stops the indoor fan motor, and only lets the drain motor run for 5 minutes. After this

operation finishes, if the float switch detects drain water, it will display an error and stop operation.

(i) When the drain motor has run for 5 minutes.

(ii) Use the remote control to set the operation mode to heating, set the temperature to 30°C, and set the timer to something

other than continuous operation.

¡ SRRM model

(4) Power blackout auto restart function

(a) Power blackout auto restart function is that records the operational status of the air-conditioner immediately prior to it being

switched off by a power cut, and then automatically resumes operations at that point after the power has been restored.

(b) The following settings will be cancelled:

(i) Timer settings

(ii) High-power operations

Notes (1) Power blackout auto restart function is set at on when the air-conditioner is shipped from the factory. Consult with your dealer if this function needs to

be switched off.

(2) When power failure ocurrs, the timer setting is cancelled. Once power is resumed, reset the timer.

(3) If the jumper wire (J7) “REMOTE/AUTORESTART (SKM), AUTORESTART (STM, SRRM) ” is cut, auto restart is disabled. (See the diagram at

above)

¡ SKM model

(5) Flap control (SKM, STM only)

Control the flap by AIRFLOW button on the wireless remote control.

(a) Air scroll

The flap will be automatically set to the angle of air flow best to operation.

(i) Starting time of operation

(ii) When not operating

The flap closes, when operation has stopped.

During cooling and

dry operation

Thick line : Rapid movement

Thin line : Slow movement

Stops for approximately 5 seconds in the horizontal position.

During heating

operation

Stops for approximately 5 seconds in this position.

Thick line : Rapid movement

Thin line : Slow movement

¡ STM, SRRM model

¡ SKM model

¡ STM model

Thick line : moves quickly

Thin line : moves slowly

Stops at this position for 5 seconds.

Thick line : moves quickly

Thin line : moves slowly

Stops at this position for 5 seconds.

During cooling and

dry operation

During heating

operation

EXTERNAL INPUT

WIRED REMOCON

OPE PERMISSION CUSTOM

AUTO RESTART

LO TEMP

DIRT PREVENT

COOL ONLY

HI CEIL PANEL

50/60

(b) Memory flap

While the flap is operating if the AIRFLOW button is pushed once, it stops swinging at an angle.

As this angle is memorized in the microcomputer, the flap will be automatically set to the angle when next operation is

started.

¡ Recommendable stopping angle of the flap

Horizontal blowing

COOL•DRY

Slant forward blowing

HEAT

¡ SKM model

Flap moves in upward and downward directions continuously.

¡ STM model

Setting time

15 min. 10 min. 5 min. earlier earlier earlier

Corrects the starting time of next operation by calculating the temperature difference.

(Example) Heating

Setting temperature

Room temperature

Operation starting time

Time

¡ If the difference (= Setting temperature – Room tempera-

ture) is 4ºC, the correction value is found to be +5 minutes from the table shown above so that the starting time of next operation is determined as follows:

15 min. earlier + 5 min. = 20 min. earlier

↑↑

Current operation Correction value start time

(6) Comfortable timer setting

If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode

operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15

minutes and the relationship between the room temperature at the setting time (temperature of room temperature sensor) and the

setting temperature. (Max. 60 minutes)

Operation mode Operation start time correction value (Min.)

3 < Room temp. – Setting temp. 1 < Room temp. – Setting temp.

< =

3 Room temp. – Setting temp.

< =

At cooling

+5 No change –5

3 < Setting temp. – Room temp. 2 < Setting temp. – Room temp.

< =

3 Setting temp. – Room temp.

< =

At heating

+5 No change –5

Notes (1) At 5 minutes before the timer ON time, operation starts regardless of the temperature of the room temperature sensor (Th

I-A).

(2) This function does not operate when in the Dry or Auto Dry mode. However, the operation in item (1) does operate in the Auto Dry mode. (3) During the comfortable timer operation, both the RUN light and TIMER light illuminate and the TIMER light goes off after expiration of the timer, ON setting

time.

COOL•DRY

HEAT

Horizontal blowing

Slant forward blowing

Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capacity

of the outdoor unit, the demand capacity will be proportionally distributed.

(ii) Outdoor unit speed control (10 ~ 95 rps)

(7) Cooling operation

(a) Summary

(i) Capacity control

Model

Capacity

SCM60ZD-S

1.4 ~ 6.9 kW

10 rps or less

More than 10 rps, but 95 rps or less

More than 95 rps

Decision speed

10 rps

10 to 95 rps

95 rps

Indoor unit command total speed value

Note (1) The indoor unit command total speed value is the total of the values from each unit in item (b).

(b) Mode switching

Within the selected mode, the unit operates using the values shown below which were obtained by multiplying a conversion

coefficient to the indoor unit command speed.

◆SKM model

Model (Indoor)

Operation Mode

Automatic

High

Medium

Low

Hi power

Econo

5 ~ 21

5 ~ 16

5 ~ 11

5 ~ 16

5 ~ 21

5 ~ 18

5 ~ 11

5 ~ 18

5 ~ 25

5 ~ 19

5 ~ 12

5 ~ 19

5 ~ 30

5 ~ 20

5 ~ 13

5 ~ 20

7 ~ 46

7 ~ 24

7 ~ 13

7 ~ 24

22 25 28 35 50

(rps)

Functional components

Operation

Command speed

Indoor unit fan

Compressor

Outdoor unit fan

Electronic expansion valve

See preceding table

According to command speed

According to outdoor unit speed

According to decision speed

(All indoor units)

OFF

According to stop mode

According to mode switching

OFF

(Thermostat off units)

All closed

(Thermostat off units)

According to outdoor unit speed

According to mode switching

All closed

(Fan, stop, abnormal stop units)

(Fan, stop, abnormal stop units)0 (All units)

According to command speed

OFF

According to stop mode

Cooling

Thermostat OFF (All indoor units)

Thermostat OFF

(Some of indoor units)

Fan, stop, abnormal stop

(Some of indoor units)

Failure

(Outdoor unit)

Fixed

Automatic

◆STM, SRRM models

Model (Indoor)

Operation Mode

Automatic

High

Medium

Low

Hi power

Econo

5 ~ 25

5 ~ 18

5 ~ 12

5 ~ 18

5 ~ 46 (5 ~ 42)

5 ~ 32

5 ~ 19

5 ~ 32

7 ~ 59

7 ~ 42

7 ~ 24

7 ~ 42

7 ~ 64

7 ~ 47

7 ~ 27

7 ~ 47

25 35 50 60

(rps)

Note (1) Values in ( ) are for type SRRM.

(b) Mode switching

Within the selected mode, the unit operates using the values shown below which were obtained by multiplying a conversion

coefficient to the indoor unit command speed.

◆SKM model

Model (Indoor)

Operation Mode

Automatic

High

Medium

Low

Hi power

Econo

5 ~ 35

5 ~ 24

5 ~ 14

5 ~ 24

5 ~ 35

5 ~ 23

5 ~ 14

5 ~ 23

5 ~ 36

5 ~ 25

5 ~ 15

5 ~ 25

5 ~ 39

5 ~ 26

5 ~ 16

5 ~ 26

7 ~ 64

7 ~ 28

7 ~ 17

7 ~ 28

22 25 28 35 50

(rps)

Functional components

Operation

Command speed

Indoor unit fan

Compressor

Outdoor unit fan

Electronic expansion valve

See preceding table

According to mode switching

According to command speed

According to outdoor unit speed

According to decision speed

(All indoor units)

OFF

According to stop mode

Hot Keep

OFF

(Thermostat off units)

According to heating stop unit control

(Thermostat off units)

According to mode switching

According to command speed

According to outdoor unit speed

According to heating stop unit control (Fan, stop, abnormal stop units)

(Fan, stop, abnormal stop units)

(All units)

ON OFF

Hot Keep

OFF

According to stop mode

Heating

Thermostat OFF (All indoor units)

Thermostat OFF

(Some of indoor units)

Fan, stop, abnormal stop

(Some of indoor units)

Failure

(Outdoor unit)

Fixed

Automatic

10 rps or less

More than 10 rps, but 95 rps or less

More than 95 rps

Decision speed

10 rps

10 to 95 rps

95 rps

Indoor unit command total speed value

Note (1) The indoor unit command total speed value is the total of the values from each unit in item (b).

(8) Heating operation

(a) Summary

(i) Capacity control

Model

Capacity

SCM60ZD-S

0.75 ~ 7.2 kW

Capacity control is within the range shown above. If demand capacity of the indoor units exceeds the maximum capacity

of the outdoor unit, the demand capacity will be proportionally distributed.

(ii) Outdoor unit speed control (10 ~ 95 rps)

◆STM, SRRM models

Model (Indoor)

Operation Mode

Automatic

High

Medium

Low

Hi power

Econo

5 ~ 40

5 ~ 29

5 ~ 17

5 ~ 29

5 ~ 49

5 ~ 36

5 ~ 21

5 ~ 36

7 ~ 59

7 ~ 42

7 ~ 24

7 ~ 42

7 ~ 64

7 ~ 47

7 ~ 27

7 ~ 47

25 35 50 60

(rps)

1st speed

Indoor heat exchanger temp. (˚C)

Note (1) Refer to the table shown above right for the values A and B.

¡ Hot keep T mode (During heating thermostat operation or fuzzy auto; operation except when the deci-

sion speed is 0 rps.)

Indoor heat exchanger temp. (˚C)

30 35 40

2nd speed (1st speed)

3rd speed

(2nd speed)

4th speed

(3rd speed)

5th speed

(4th speed)

6th speed

(5th speed)

45 50

(d) Hot keep operation

◆22, 25, 28, 35 models

If the hot keep operation is selected during the heating operation, the indoor fan is controlled based on the temperature of the

indoor unit heat exchanger (detected with Th

I-R1) to prevent blowing of cool wind.

¡ Normal mode (Normal heating operation, operation after HI POWER completion)

1st speed

¡ Values of A, B

At 0 rps command 22 25 Other than 0 rps

17 19

command

Note (1) Refer to the table shown above right for the values A and B.

¡ Hot keep M mode [During HI POWER operation (for 15 min.)]

Indoor fan

Indoor heat exchanger temp. (˚C)

2nd speed

3rd speed

5th speed

6th speed

7th speed

8th speed

2nd speed

3rd speed

5th speed

6th speed

7th speed

9th speed

Indoor fan

10th speed

Indoor fan

Note (1) Values in ( ) are for type STM, SRRM.

¡ Hot keep M mode [During HI POWER operation (for 15 min.)]

1st speed

Indoor heat exchanger temp. (˚C)

2nd speed

3rd speed

5th speed

6th speed

7th speed

8th speed

(9th speed)

Indoor fan

¡ Hot keep T mode (During heating thermostat operation or fuzzy auto; operation except when the deci-

sion speed is 0 rps.)

Indoor heat exchanger temp. (˚C)

30 35 40

1st speed

2nd speed

3rd speed

4th speed

5th speed

45 50

◆50, 60 models

¡Normal mode (Normal heating operation, operation after HI POWER completion)

1st speed

¡ Values of A, B

At 0 rps command 22 25

Other than 0 rps

17 19

command

Notes (1) Refer to the table shown above right for the values A and B.

(2) Values in ( ) are for type STM, SRRM.

Indoor heat exchanger temp. (˚C)

2nd speed

3rd speed

5th speed

6th speed

7th speed

8th speed

9th speed

(10th speed)

OFF

A B 27.5 28 29.5 31.5 34 36 37.5 39 40

Indoor fan

Notes (1) Refer to the table shown above right for the values A and B.

(2) Values in ( ) are for type STM, SRRM.

Indoor fan

R2rps

Decision rps

300 pulse

EEV control

Opening in relation to conditions

R1rps

Decision rps

0rpsOutdoor unit speed

After compressor software

has started

According to rpsOutdoor unit fan

OFF

ON4-way valve

OFF

470 pulse

fully opened

250 pulseElectronic expansion valve EEV (Operating unit)

EEV control

50 sec.

Opening in

relation to

conditions

Electronic expansion valve EEV (Stopped unit)

0 pulse

X1 pulse

X2 pulse

Start of defrost operation Defrost end operationDefrost operation

Defrost end condition

100 sec. 120 sec.

Indoor unit fan is in response to Hot Keep.

Notes (1)

(e) Defrosting

(i) When the following conditions are met, the defrosting operation will start.

1) During normal operation

a) When 40 minutes has passed since the start of heating or 40 minutes after the last defrosting (based on cumulative

operation time of compressor).

b) When the outdoor heat exchanger sensor (Tho-R) temperature is –2 °C or less for 3 continuous minutes after 37

minutes have passed.

c) Outdoor temperature sensor (Tho-A) – outdoor heat exchanger sensor (Tho-R) temperature

> =

0.44 × outdoor

temperature sensor (Tho-A) temperature + A °C or more.

A = Outdoor temperature

> =

– 2 °C: 4, outdoor temperature < – 2 °C: 6.

d) When the compressor is operating.

u Or, during heating, defrosting will start when the decision speed counts zero (0) rps for 10 times or more and

all conditions in a), b) and d) have been satisfied.

2) During defrosting acceleration

a) When 40 minutes has passed since the last defrosting (based on cumulative operation time of compressor).

b) When the compressor is operating.

u Or, during heating, defrosting will start when the decision speed counts zero (0) rps for 10 times or more and

all conditions in a) and b) have been satisfied.

Note (1) Defrosting acceleration is when the finishing of the previous defrosting is according to the defrosting conditions of the 10 minutes

that have passed.

3) Operation of function component in defrosting

4) Conditions for finishing defrosting

When any of the following conditions is met, the defrosting finishing operation will start.

1 When the temperature of the outdoor heat exchanger sensor (Tho-R) is 20 °C or more.

2 When 10 minutes has passed after the start of defrosting.

(9) Outline of automatic operation

(a) Determination of operation mode

The unit checks the room temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 20

seconds, determines the operation mode and the room temperature setting correction value, and then enters in the automatic

operation.

Heating

Dehumidifying

Cooling

Room temperature (˚C)

Outdoor temperature (˚C)

27.5

25.5

19.5

(b) The unit checks the temperature every hour after the start of operation and, if the result of check is not same as the previous

operation mode, changes the operation mode.

(c) When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is

selected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.

(d) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals

of the wireless remote control and the setting temperature.

Signals of wireless remote control (Display)

–6 –5 –4 –3 –2 –1 ±0+1+2+3+4+5+6

Setting

Cooling 19 20 21 22 23 24 25 26 27 28 29 30 31

temperature

Dehumidifying 19 20 21 22 23 24 25 26 27 28 29 30 31

Heating 20 21 22 23 24 25 26 27 28 29 30 31 32

◆SCM60ZD-S

Outdoor unit speed Outdoor unit fan

R1 (rps) R2 (rps) F1

1-room 2-room 3-room 1-room 2-room 3-room

20 35 50 15 25 35

X1 pluse X2 pluse

1-room 2-room 3-room 1-room 2-room 3-room

Currently heating unit

180 160 150 140 115 110

(10) Determining the operating mode

The cooling and heating operating modes are the remote control switch mode that have been previously determined.

If a mode differing from these is selected after this, the selected mode will appear in the display of the remote control, but only the

fan will operate.

A unit

B unit

Cooling

Fan Heating

HeatingFan

Cooling

switch

Heating

switch

Heating

switch

Cooling

switch

Heating

switch

Operation Operation

Operation

Example of operating pattern

Note (1) [ ] indicates currect operation.

First operation Second operation

Notes

Selected Mode

Cooling

Heating

Example

Remote Control Display

Cooling

Heating

Operation

Cooling

Heating

Selected Mode

Heating

Cooling

Remote Control Display

Heating

Cooling

• Different mode is only fan operation.

Operation

Fan

(1)

Fan

Note (1) If the display shows

heating and the operation is fan, Hot Keep will operate.

CnT Input

A Unit

B Unit

OFF

*ON

OFF

Note (1) The ON with the * mark indicates

an ON operation using the remote

control unit switch, etc.

(ii) When Jumper wire J1 on the PCB of indoor unit is cut at the field or “PULSE INPUT” is selected in the wired remote

control’s indoor unit settings.

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

CnT Input

A Unit

B Unit

OFF

*ON

(11) External control (remote display)/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.

(a) External control (remote display) output

Following output connectors (CNT) are provided on the printed circuit board of indoor unit.

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

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

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

sor is operating.

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

(b) Control of input signal

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.

(i) If the factory settings (Jumper wire J1 EXTERNAL INPUT on the PCB) are set, or “LEVEL INPUT” is selected in the

wired remote control’s indoor unit settings.

1) Input signal to CnT OFF → ON Air conditioner ON

2) Input signal to CnT ON → OFF Air conditioner OFF

(12) Operation permission/prohibition control

The air conditioner operation is controlled by releasing the jumper wire (J3) on the indoor control board and inputting the external

signal into the CnT.

(a) The operation mode is switched over between Permission and Prohibition by releasing the jumper wire

(1)

on the indoor control board.

(b) When the CnT input is set to ON (Operation permission)

(i) The air conditioner can be operated or stopped by the signal from the remote control signal line.

(When the "CENTER" mode is set, the operation can be controlled only by the center input.

(ii) When the CnT input is changed from OFF to ON, the air conditioner operation mode is changed depending on the status

of the jumper wire (J1) on the indoor control board.

(i) The air conditioner cannot be operated or stopped by the signal from the remote control signal line.

(ii) The air conditioner operation is stopped when the CnT input is changed from ON to OFF.

(d) When the operation permission / prohibition mode is set to effective by the indoor function setting selected

by the remote control, the operation depends on (a) above.

When the jumper wire (J3) is short circuited

Normal operation is enable (when shipping)

When CnT input is set to ON, the operation starts and

if the input is set to OFF, the operation stops.

For the CnT and remote control inputs, the input which

is activated later has priority and can start and stop the

operation.

When the jumper wire (J3) is released

Permission / Prohibition mode

When Cnt input is set to ON, the operation mode is

changed to permission and if input is set to OFF the

operation is prohibited.

When the jumper wire (J1) is short circuited

The signal (i) above starts the air conditioner.

(Shipping status)

When the jumper wire (J1) is released

When the CnT input is set to ON, the air conditioner

starts operation. After that, the operation of the air

conditioner depends on (i) above. (Local status)

¡ Temperature list

ABC

ThI-A

< =

24 48.5 56 62

24 < ThI-A

27 47.5 53 61

27 < ThI-A 46.5 50 60

(Example) Fuzzy

Indoor unit heat exchanger temperature (˚C)

Lower limit (4)

After lapse of 20 Sec. or over

(2)

After lapse of 20 Sec. or over

(2)

After lapse of 20 Sec. or over

(2)

8 rps

(1)

8 rps

0 rps

Unit : ºC

(13) Control and protection functions

(a) Frost prevention for indoor heat exchanger (During cooling or dehumidifying)

(i) Operating conditions

1) Indoor heat exchanger temperature (detected with Th

I-R1) is lower than 5ºC.

2) 10 minutes elapsed after the start of operation.

(ii) Detail of anti-frost operation

• SKM model • STM, SRRM models

(iii)Reset conditions: Indoor heat exchanger temperature (Th

I-R1) is higher than 8ºC (7ºC).

Note (1) Values in ( ) are for type STM, SRRM.

(b) High pressure control

(i) Purpose: Prevents abnormally high pressure operation during heating. (ii) Detector: Indoor unit heat exchanger sensor (Th

I-R1)

(iii)Detail of operation:

Notes (1) When the indoor unit heat exchanger temperature is in the range of B~C ºC, the indoor command speed is reduced by 8 rps at each 20 seconds.

When the temperature is C ºC or over for 1 minute continuously, the compressor is stopped.

(2) When the indoor unit heat exchanger temperature is in the range of A~B ºC, if the indoor command speed is been maintained and the operation has

continued for more than 20 seconds at the same speed, it returns to the normal heating operation.

(3) Indoor blower retains the fan tap when it enters in the high pressure control. Outdoor blower is operated in accordance with the speed. (4) 22~35 type: 20 rps. 50~60 type: 35 rps

Indoor heat exchanger temp. (°C)

2.5 5 8

0 rps

minimum rps

decision rps

Indoor heat exchanger temp. (°C)

3257

0 rps

minimum rps

(

decision+min

) rps

decision rps

(i) Operating conditions: When both of following conditions have continued for more than 5 minutes later than 5

minutes after the start of operation.

1) Indoor command speed is higher than 0 rps

2) During cooling, dehumidifying: Indoor heat exchanger temperature - Room temperature > – 4ºC

(ii) Detail of operation

1) Indoor unit

The command speed is forced to operate at 16 rps.

2) Outdoor unit

For 5 minutes after the main controller starts, the outdoor unit speed is 10 rps. After 5 minutes, the outdoor unit speed

is 30 rps, up until 8 minutes of operation. After 8 minutes, the outdoor unit speed is 10 rps, up until 13 minutes of

operation. After 13 minutes, the outdoor unit speed is 30 rps, up until 16 minutes of operation.

(iii)Restoration conditions: When the condition becomes either conditions shown below

During cooling, dehumidifying: Th

I-R1 (8) – ThI-R1(5)

< =

-2 ºC, ThI-R1 (16) – ThI-R1(13)

< =

-2 ºC

Notes (1) ThI-R1(X): After this control starts, the indoor heat exchanger temperature after X minutes.

(2) This control is valid when the room air temperature is in the range of 10 to 40ºC at cooling and dehumidification operation.

(d) Crankcase heater

(i) Operating conditions (When all the conditions below are satisfied)

1 After the operation mode is changed to stop and the decision speed becomes 0 rps continuously for 30 minutes.

2 When the temperature detected by the outdoor temperature sensor is 10 ºC or lower after the compressor stops.

(ii) Detail of operation

The crankcase heater operates, warming up the compressor, then refrigerant begins circulating smoothly when the cooler

starts its heating operation, and heating begins.

(iii)Restoration conditions

When the temperature detected by the outdoor temperature sensor reaches 12ºC or higher, or the operation mode changes

from stop to cooling or heating.

(e) Inching prevention

When the compressor becomes to the thermo operation within 3 minutes since operation start or becomes dehumidifying

operation, the operation is continued with the indoor command speed of 16 rps forcibly.

(f) Inching protection control

(i) In order to prevent the refrigerant from dissolving in the refrigerant oil and diluting it due to frequent starts and stops of

the compressor under thermostat operation, the unit is controlled so that the temperature detected by the sensor is continued

for 1 minute during cooling: at 21ºC or lower, during heating: at 0ºC or lower.

(ii) It recovers if the temperature sensed by the outdoor temperature sensor is 23ºC or higher during cooling, 2ºC or higher

during heating.

1 min. 55 sec.

Stop mode

Outdoor unit

speed

Crankcase

heater

Decision

rps

0 rps

OFF

1 min.

(g) Start of protection for compressor

Compressor protection starts when the operation mode changes from stop to cooling or heating and the decision speed is

other than 0 rps.

(i) Start of protection I (Operation mode: cooling; Decision speed: other than 0 rps)

1) If the decision speed is 30 rps or higher, it runs for 1 minute 45 seconds at 30 rps, then changes to the decision speed.

2) After 1) above, if the decision speed is 54 rps or higher, it runs for 5 minutes at 54 rps, then changes to the decision

speed.

3) If the compressor is restarting after a thermostat stop, the protection function for the indoor unit operates and Start of

protection I is not executed.

(ii) Start of protection II (Operation mode: heating; Decision speed: other than 0 rps)

1) If the decision speed is 30 rps or higher, it runs for 1 minute 45 seconds at 30 rps, then changes to the decision speed.

2) After 1) above, if the decision speed is 38 rps or higher, it runs for 3 minutes at 38 rps, then changes to the decision speed.

3) After 2) above, if the decision speed is 46 rps or higher, it runs for 4 minutes at 46 rps, then changes to the decision speed.

4) After 3) above, if the decision speed is 54 rps or higher, it runs for 5 minutes at 54 rps, then changes to the decision speed.

(iii)Low load start

In order to assure that oil is supplied to the compressor and 4-way valve changes smoothly.

⽧ Cooling

If the decision speed is below 20 rps, it runs at 20 rps for 60 seconds, then changes to the decision speed.

⽧ Heating

If the decision speed is below α1 rps, it runs at α1 rps for 5 minutes, then changes to the decision speed.

• Value of α1

(h) Heating overload protection control

⽧ Indoor unit side (i) Operating conditions: When the outdoor unit is heating at a decision speed other than 0 rps and the outdoor air

temperature (detected by Th

O-A) rose beyond 17ºC for 2 minutes continuously.

(ii) Detail of operation

a) Indoor fan speed is raised forcibly by 1 step. b) Taking the upper limit of control speed range at 80 (50, 60 type: 60) rps, if the indoor command speed exceeds the

upper limit, the upper limit value is maintained.

(iii)Reset condition: When the outdoor air temperature drops below 16ºC.

⽧ Outdoor unit side

During heating operation, if the outdoor unit is operating at a decision speed other than 0 rps and the outdoor temperature

is 14 °C or more for 30 continuous seconds, current safe control is performed.

Operation is restored when the outdoor temperature is 12 °C or less.

(i) Cooling overload protection control

During cooling operation, if the outdoor unit is operating at a decision speed other than 0 rps and the outdoor temperature is

39 °C or more for 30 continuous seconds, current safe control is performed by turning the outdoor fan motor is forcedly set

on Me. Operation is restored when the outdoor temperature is 38 °C or less.

(j) Heating low temperature protection control

⽧ <I> (i) Operating conditions: When the outdoor unit is heating at a decision speed other than 0 rps and the temperature of the

outdoor air sensor is 4ºC or lower for 5 minutes continuously.

(ii) Detail of condition: When the decision speed is lower than 20 rps, the decision speed is forcedly raised to 20 rps. (iii)Reset condition: When the temperature of the outdoor air sensor is higher than 6ºC. ⽧ <II> (i) Operating conditions: When the outdoor unit is heating at a decision speed other than 0 rps and the temperature of the

outdoor air sensor is 0ºC or lower for 5 minutes continuously.

(ii) Detail of condition: The outdoor fan speed is raised forcibly by 1 step. (iii)Reset condition: When the temperature of the outdoor air sensor is higher than 2ºC.

During heating overload protective control (Tho-A

> =

14°C) Before heating overload protective control (Tho-A<14°C)

SCM60ZD-S 23 rps 34 rps

⽧ <III>

(i) Operating conditions: When the outdoor unit is heating at a decision speed other than 0 rps and the temperature of the

outdoor heat exchanger sensor is –12ºC or lower.

(ii) Detail of condition: The decision speed is controlled as shown below.

(iii)Reset conditions: When the temperature of the outdoor heat exchanger is higher than –4ºC.

3) Reset conditions: When the decision speed becomes 0 rps from a speed other than 0 rps.

(k) High pressure cut protection control

High pressure cut protection control is executed when 1 or 2 units stop during heating while multiple units are operating.

1 If 1 unit only stops while multiple units are operating.

-4

Decision speed

70 rps

40 rps

20 rps

-12-16-20

Outdoor heat exchanger temp. (˚C)

Functional components

A room

Command rps

Command speed from indoor unit that has "heating 0 rps".

Command speed for indoor unit that has "other than heating 0 rps".

Corresponding expansion valve for unit with serial signal that has "other than heating 0 rps".

Corresponding expansion valve for unit with serial signal that has "heating 0 rps".

Heating stop unit control

0 rps

Command rps

Decision rps

0 rps

Command

B room

Decision speed

Outdoor unit fan

4-way valve

EEV A

Indoor unit command speed

Operation of each functional components Remarks

Command speed for indoor unit that has "other than heating 0 rps".

Command rps

0 rps

C room

According to decision rps

According to outdoor rps

0 rps

Fully opened

Fully closed

OFF

EEV B

According to outdoor rps

Fully opened

Fully closed

Corresponding expansion valve for unit with serial signal that has "other than heating 0 rps".

EEV C

According to outdoor rps

Fully opened

Fully closed

2 min.

High pressure cut protection control

2 If 2 units stop while 3 units are operating.

Functional components

A room

Command rps

Command speed from indoor unit that has "heating 0 rps".

Command speed for indoor unit that has "heating 0 rps".

Corresponding expansion valve for unit with serial signal that has "heating 0 rps".

High pressure

cut protection

control

High pressure cut protection control

Heating stop unit control

0 rps

Command rps

Decision rps

0 rps

Command

0 rps

Command

B room

Decision speed

Outdoor unit fan

4-way valve

EEV A

Indoor unit command speed

Operation of each functional components Remarks

Command speed for indoor unit that has "other than heating 0 rps".

Command rps

0 rps

C room

According to decision rps

According to outdoor rps

0 rps

Fully opened

Fully closed

OFF

EEV B

According to outdoor rps

Fully opened

Fully closed

Corresponding expansion valve for unit with serial signal that has "other than heating 0 rps".

EEV C

According to outdoor rps

Fully opened

Fully closed

2 min.

3 Stop mode during high pressure cut control.

Functional components

A room

Command rps

Command speed from indoor unit that has "heating 0 rps".

Command speed for indoor unit that has "heating 0 rps".

Corresponding expansion valve for unit with serial signal that has "heating 0 rps".

High pressure cut protection control

Heating stop unit control

0 rps

Command rps

Decision rps

0 rps

Command

0 rps Command

B room

Decision speed

Outdoor unit fan

4-way valve

EEV A

Indoor unit command speed

Operation of each functional components Remarks

Command speed for indoor unit that has "other than heating 0 rps".

Command rps

0 rps

C room

According to decision rps

According to outdoor rps

0 rps

Fully opened

Fully closed

OFF

EEV B

According to outdoor rps

Fully opened

Fully closed

Corresponding expansion valve for unit with serial signal that has "other than heating 0 rps".

EEV C

According to outdoor rps

Fully opened

Fully closed

2 min.

Within

2 min.

High pressure cut protection control

(l) Low rps continuous operation protection control

The following controls are performed to return oil to the compressor when the decision speed other than 0 rps and 20 rps or

less is continuously operated for 8 minutes.

(i) The decision speed is forced to operate at 30 rps for 30 seconds.

(ii) If there is a decision exceeding 30 rps during this forced 30 rps operation, this control ends and the operation follows that

decision.

(m) Refrigerant oil recovery control

If the all of the indoor units are not operate at the same time for some extended period, the cooling or heating performance

may temporarily decrease. This is in order to control the recovery of the refrigerant oil in the stopped indoor unit.

(i) This control is performed when all of the following conditions have been satisfied.

1) Operating mode : Cooling or heating.

2) When 240 minutes of cumulative operating time has passed after the power is turned on, and after refrigerant oil

recover control is completed, of after operation for all rooms in the same mode is completed.

(ii) Description of control

30rps

Compressor

EEV (Operating unit)

EEV (Stopped unit)

Outdoor-unit fan

minimum rps

0rps

470 (fully opened)

0rps

470 (fully opened)

0 (fully closed)

470 (fully opened)

0 (fully closed)

Heating stop Unit control

470 (fully opened)

0 (fully closed)

0rpm 0rpm

60sec.

Start of control Start of control

120sec. 60sec.

[Cooling]

30rps

60sec. 120sec. 60sec.

[Heating]

(p) Compressor overheat protection

The detection temperature of the discharge pipe sensor (Tho-D) is used to prevent oil deterioration and damage to the motor

wire due to overheating of the compressor.

(i) If Tho-D becomes

> =

110 °C, the compressor is stopped. After the stop mode has been activated, the compressor will be

restarted when Tho-D becomes < 80 °C. However, if it is restarted repeatedly within an interval of 1 hour, it will not start

on the 3 times.

(ii) When 90 °C

< =

Tho-D < 110 °C, the following decision speed controls are performed.

(q) Serial transmission abnormality protection

If the compressor is operating with a decision speed other than 0 rps and a serial signal cannot be received from all indoor

controls with outdoor controls having serial signals other than “stop - 0 rps” continuously for 1 minute and 55 seconds, the

compressor is stopped.

After the compressor has been stopped, it will be restarted after the compressor start delay if a serial signal can be received

again from the indoor control.

(r) Compressor lock

If the motor for the compressor does not turn 1/12 revolution 0.044 seconds after it has been started, it is determined that a

compressor lock has occurred and the compressor is stopped.

(s) Discharge pipe sensor disconnection protection control

(i) When the decision speed is other than 0 rps.

1) Th

O-D(10)

ThO-D(0) < 8 °C, and ThO-D(10)-ThO-A(10) < 5°C

The decision speed is set on 10 rps for 5 minutes. After 5 minutes, the decision speed is set on 40 rps for 5 minutes.

2) Th

O-D(20)

ThO-D(15) < 5 °C :

The decision speed is set on 0 rps.

(ii) Once the unit is stopped by this function, it is not restarted.

Discharge pipe temperature (°C)

Notes (1) If the temperature of the discharge pipe is 90 °C or more and less than 110 °C, the decision speed is reduced by 4 rps.

(2) After 20 seconds, if the temperature of the discharge pipe has decreased, it is lowered 2 rps. If the temperature has risen or is the

same, it is lowered another 4 rps.

(3) If the temperature of the discharge pipe is 80 °C or more and less than 90 °C, the decision speed is maintained. If operation is

maintained at the same speed for 6 minutes or more or if the temperature is 80 °C or less, control is returned to normal operation.

6 minutes of more has passed

(3)

6 minutes of more has passed

(3)

6 minutes of more has passed

(3)

Lower limit 20 rps

4 rps

1109080

4 rps or 2 rps

(2)

4 rps or 2 rps

(2)

0 rps

Decision speed

Inverter

Notes (1) Tho-D(X): After compressor operation, the discharge pipe sensor temperature after X minutes.

(2) Tho-A(X): After compressor operation, the outdoor air sensor temperature after X minutes.

(n) Current safe control

(i) When converter in port current is detected at the current sensor (CT) and it exceeds the set amperage, the decision speed is

reduced. This is rechecked after one second and if it still exceeds the set amperage, the decision speed is reduced 2 rps.

(ii) If the decision speed operated at 20 rps or less, the compressor is stopped. It is restarted after a 3 minute delay.

(o) Current cut

This detects converter output current at the shunt resistor and if it exceeds the set value, the compressor is stopped. It is

restarted after a 3 minute delay.

(t) Outdoor unit failure

This is a function for determining when there is trouble with the outdoor unit during air conditioning.

The compressor is stopped if any one of the following in item (i), (ii) is satisfied. Once the unit is stopped by this function,

it is not restarted.

(i) When the input current is measured at 1 A or less for 3 continuous minutes or more.

(ii) If the outdoor unit sends a 0 rps signal to the indoor unit 3 times or more within 20 minutes of the power being turned on.

(u) Stop mode

Functional

components

HeatingOperation

Decision

speed

Decision

rps

Fully opened

150 pulse

Fully closed

Fully opened

Fully closed

Fully opened

Fully closed

0 rps

OFF

According to

outdoor rps

Me Me

OFF

Outdoor unit fan

4-way valve

EEV A

EEV B

EEV C

Stop instruction

All stop All stop

1 min.

2 min.

2 min. 55sec.

Cooling

150 pulse

1 min.

2 min.

2 min. 55sec.

150 pulse

(v) Dew condensation prevention control for the cooling and dehumidifying operation (STM, SRRM type

only)

⽧ <I>

(i) Operation condition: During cooling or dehumidifying operation, 20 minutes elapsed after starting (with decision

speed something other than 0 rps), under the following conditions.

1) When the fan speed is set to “AUTO” or “HI”, or operation mode is set to “HI POWER”

(ii) Detail of operation: The upper limit of the decision speed is set to the maximum number of revolutions at fan speed

“MED”.

(iii)Rest conditions: Any one of the following conditions.

1) Fan speed set to anything other than “AUTO” or “HI”, or operation mode set to something other than “ HI POWER”

2) 50 minutes elapsed after starting (with decision speed something other than 0 rps)

3) When decision speed is set to 0 rps

⽧ <II>

(i) Operation condition: During cooling or dehumidifying operation after starting (with decision speed set to something

other than 0 rps), and all of the following conditions are satisfied.

1) When fan speed set to “AUTO” or “HI”, or operation mode to “ HI POWER”.

2) When the indoor heat exchanger temp.(Th

I-R1

) rises 5˚C or more relative to the lowest temperature within the first 3

minutes of operation.

(ii) Detail of operation: The upper limit of the decision speed is set to the maximum number of revolutions at fan speed

“MED”.

(iii)Rest conditions: Any one of the following conditions.

1) Fan speed set to anything other than “AUTO” or “HI”, or operation mode set to anything other than “ HI POWER”

2) 30 minutes elapsed after this command starts

3) Decision speed set to 0 rps

(w) Drain water overflow prevention function (STM, SRRM type only)

(i) Operation condition: Float switch detects drain water for more than 3 seconds.

(ii) Detail of operation: Sets the decision speed to 0 rps, stops the indoor fan motor, and only lets the drain motor run for

5 minutes. After this operation finishes, if the float switch detects drain water, it will display an error and stop operation.

(iii)Rest conditions: After the drain motor run for 5 minutes, the float switch cannot detect water.

(14) Regulation of outdoor air flow

(a) The fan operates as follows according to the decision speed. (Except during defrost.)

(b) If the outdoor unit’s fan speed drops, the outdoor fan is run for 2 minutes at that speed.

Cooling Heating

Decision speed Less than 40 40 or more Less than 50 50 or more

Outdoor fan speed Low Medium Low Medium

5.5 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

¡ To disconnect the appliance from the mains supply this appliance must be connected to the mains by means of

a circuit breaker or a switch (use a recognized 25A) with a contact separation of at least 3mm.

¡ The appliance shall be installed in accordance with national wiring regulations. ¡ This system should be applied to places as households, residences and the like. Application to inferior environ-

ment 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.

¡ 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.

¡ 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.It’s 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 (R410A) 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.

¡ Ventilate the work area when refrigerant leaks during the operation.

Coming in contact with fire, refrigerant could generate toxic gas.

¡ Confirm after the foundation construction work that refrigerant does not leak.

If coming in contact with fire of a fan heater, a stove or movable cooking stove, etc., refrigerant leaking in the room could generate toxic gas.

¡ In joining pipes, do not use conventional (R22) pipng flare nuts, etc. The use of conventional pipng materials may

lead to the rapture of piping due to higher pressure used for the refrigerant cycle and possible personal injury. (Use only piping material designed specifically for R410A)

¡ If the power cord becomes damaged, ask your dealer or qualified enginner to install the replacement to avoid accidents. ¡ Beware of the Alminume fins, the Flare of pipes, Top screw, and etc. You could injure your fingers, etc. ¡ When working at high place, be careful not to drop tools.

CAUTION

¡ 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 even 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.

5.5.1 Installation of indoor unit

(1) Wall mounted type (SKM)

(a) Caution for installation

1) The system should be applied to places as households, residences and the like.

2) The equipment shall be installed in accordance with national wiring regulations.

3) The connection to the fixed wiring of the mains supply must be made via a double pole isolating switch with a contact

gap of at least 3mm in each pole.

4) When the outdoor unit has a possibility of being overturned or being displaced and fall from its original installation

position, the outdoor unit should be fixed in its position by the use of anchor bolts or wires.

(b) Installation of indoor unit

1) Fixing of installation Board

Outdoor side

5°

ø65

Indoor side

Wall thickness + 1.5cm

Sleeve

Sleeve Inclined plate

Sealing plate

Putty

Pipe

Assembled state

¡ Drill a hole with a 65 whole

core drill.

¡ Look for the inside wall structures (Intersediate

support or pillar and firaly install the unit after level surface has been checked.)

¡ When the pipe is connected at the rear, cut off the lower and the right

side portions of the sleeve collar (as shown by the broken line.)

2) Drilling of holes and fixture of sleeve (Option parts)

¡The connecting wires may touch the metal inside the wall and cause danger so it is necessary to always use the sleeve.

Installation space (Indoor unit)

¡Adjustment of the installation board in the horizontal

direction is to be conducted with four screws in a temporary tightened state.

Mating mark for level surface

450

580

450

117.5

148.5

216.5

117.5

42.7175

65 Speace

for service

15Speace

for service

8.2236.1

44.5

5.7

47.244.5

Speace for

service

Speace for service 100

216.5

148.5

67.553.5

Piping hole (ø65)Piping hole (ø65)

Piping for Gas 397.1

Piping for Liquid 465.1

Drain hose 540(ø16)

INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW)

Unit : mm

¡Adjust so that board will be level by turning the board

with the standard hole as the center.

Standard hole

3) Mounting of interconnecting wires (Field wiring)

a) Remove the lid. b) Remove the terminal block cover. c) Connect the connection wire securely to the terminal block.

Cautions when piping from the left and the rear center of the unit

Pipe

Drain hose

Left Side Piping

Left rear piping Right rear piping

Right

Rear

Under

Left rear

Left

Left side piping

[Procedure for exchanging the drain hose.]

Right side piping

1.Remove the drain hose.

2.Remove the drain cap.

3.Insert the drain cap.

4.Connect the drain hose.

Right Side Piping

The piping can be removed from the rear, left, left rear, right and from under the unit.

¡ Tape only the portion that runs through the wall.

Always tape the crossover wires with the pipe.

¡ Loosen and remove the

spring-type clamp.

¡ Remove with your

hand or a pair of pliers.

Use a hexagonal wrench

to correctly insert the drain cap which was

removed in 2. Caution: Be careful because if the cap is not inserted property, water leak may occur.

¡ Loosen the spring-type

clamp and securely insert the drain hose. Caution: Be careful because if the cap is not inserted properly, water leak may occur.

¡ Hold the bottom of the pipe and change its direction

before stretching it and shaping it.

Wall

Gutter

Pipes storage area

¡ Do not place the power supply cords above the gutter, because the air

conditioner is structured in a way where condensation on the back side is collected in to the drain pan before drainage.

Use cables for interconnection wiring to avoid loosening of the wires. CENELEC code for cables Required field cables. H05 RNR4G1.5 (Example) H Harmonized cable type 05 300/500 volts R Natural-and/or synth. rubber wire insulation N Polychloroprene rubber conductors insulation R Stranded core 4 Number of conductors G One conductor of the cable is the earth conductor (yellow/green)

1.5 Section of copper wire (mm

)

[Top View]

1) Connect the connection wire securely to the terminal block. If the wire is not affixed completely, contact will be poor, and it is dangerous as the terminal block may heat up and catch fire.

2) Take care not to confuse the terminal numbers for indoor and outdoor connections.

3) Affix the connection wire using the wiring clamp.

d) Attach the terminal block cover. e) Attach the lid.

4) Shaping the pipe and drain hose

[Shaping the pipe] [Taping of the exterior]

Clamp

Terminal cover

Lid (R)

Terminal block

¡ Pour water in the drain pan below the heat exchanger and confirm that the water is drained outside.

¡ If the extension drain hose is indoors, make sure it is insulated using a shielding pipe (not supplied).

5) Securing the Indoor Unit to the Installation Board

Drainage

Too high It curves like a wave.

under 5 cm

Smell from sewerage drains.

The end of the drain hose is touching the water.

The gap to the ground is less than 5 cm.

The end of the drain hose is touching the sewage drains.

Drain hose

Extension drain hose

when a part of the extension drain hose is indoors

Shielding pipe

Indoor unit

Hook (2 locations)

Installation

board

Instalation board

Indoor unit base lower hook

Wall

Installing steps

1. Hook the upper part of the indoor unit to the installation board.

2. The unit can be installed simply by gently pushing in the lower part.

¡ The drain hose must be fit with a downward slope.

¡ Do not set the drain hose like the following illustrations.

(2) 4-way ceiling cassette type (STM)

(a) Caution for installation

Install at location that meets the following conditons after getting approval from the customer.

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

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

circulator.

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

erroneously, where no short circuits occur.

3) Where there is no obstructions to the air flow and where the cooled air can be evenly distributed.

A solid place where the unit or the wall will not vibrate.

4) A place where there will be enough space for servicing.

(Where space mentioned below can be secured)

5) Where wiring and the piping work will be easy to conduct.

6) The place where receiving part is not exposed to the direct rays of the sun or the strong rays of the street illumination.

7) When a sufficient interval cannot be secured between the unit and a wall or another unit, shut up diffusers on that side to

block winds and make sure that no short-circuiting is occurring.

(A wind blocking material is available as an optional part)

sDo not use the unit in the "Lo" wind mode, when winds are blown into two or three directions.

(b) Installation of indoor unit

1) Installation dimensions

To be installed at site

Ceiling opening 660 (For conventional ceiling)

Hanging bolt pitch 530

Control box

Drain hose(accessory)

Inspection port (For conventional ceiling)

PANEL

Air outlet

Air intake

Hanging fixture

45 or

197

137

196

250

Mark Description Model 25.35ZE-S 50.60ZE-S

A Gas tube connecting port

9.52 (Flare) ø12.7 (Flare) B Liquid tube connecting port ø6.35 (Flare) C Drain line tube connecting port VP25* D Power intake E Hanging bolt (M10 or M8)

* Please arrange VP25 connector sockets on the installer's part.

Hanging bolt pitch 530

150

541

202 43

413 700

450

350

319

570

104

243

B A

1000 or more

(mm)

Obstruction

1000 or more

2500 or more

Control Lid

Clamp

Terminal block

Installation Space (front view) (unit: mm)

2) Drilling of holes in the wall and fixture of sleeve

The instructions for installation is the same as the SKM type. Please refer to page 46.

3) Preparations for the Main Frame

Mounting of interconnecting wires (Field wiring)

a) Remove the control lid.

b) Connect the connection wire securely to the terminal block.

1.5 Section of copper wire (mm

)

Unit: mm

1) Connect the connection wire securely to the terminal block. If the wire is not affixed completely, contact will be

poor, and it is dangerous as the terminal block may heat up and catch fire.

2) Take care not to confuse the terminal numbers for indoor and outdoor connections.

3) Affix the connection wire using the wiring clamp.

c) Attach the control lid.

4) Hanging the unit

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

installation site.

A . When hanging from the ceiling

a) When installing on a 2´ x 2´ grid ceiling, put in the unit on an angle, or hang the unit with

the T bar temporarily removed. When installing on a conventional ceiling, cut an insta-

llation opening (660mm x 660mm) in the ceiling, and hang the unit. When installing

on a conventional ceiling, cut an opening (Min 450 x 450) for inspection purposes.

b) Determine the positions of hanging bolts (530 x 530).

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

d) Make hanging bolts to the length that leaves approximately 45 mm of them above the ceiling. In hoisting the unit

main body in, temporarily fasten the four lower nuts of the hanging bolts approx. 93 mm from the ceiling and the

four upper nuts at positions sufficiently far from the lower nuts so that they may not hamper installation work when

the unit is hoisted in or the height is adjusted.

e) After hoisting in the unit , attach level gauges supplied as access-

ories and determine the unit position (height).To adjust height, use

the four lower nuts with the four upper nuts left loose. Please make

sure that the unit's four hanging fixtures touch the four lower nuts

and washers evenly without any play.

f) Please make sure that the unit main body is installed levelly. Level must be checked with

a level or a clear hose filled with water. (A tolerable height difference at an end of the

unit is within 3 mm)

g) After you have adjusted the height and level of the unit, fasten the four upper nuts to fix the unit.

Control box

T bar

Ceiling panel

Spring washer

Drainage

Refrigerant piping

Level gauge

Main unit

Hanging bolt

Nut

Washer

Indoor unit

hose

Play is left between the fixture and the lower nut and washer

Use level gauges as reference. adjust the bottom to the face of the ceiling.

Ceiling panel

Ceiling material

T-bar

Level gauge (insulation)

Diffuser Diffuser

Attach it by aligning it with this side of a diffuser.

[For conventional ceiling]

[For 2´ x 2´ grid ceiling]

Correct

Main

unit

Touch the lower nut and washer without any play

Incorrect

Main

unit

Notes • Do not adjust the height with the upper nuts. It may cause deformation due to excessive force working on the

unit main body, which can result in such problems that you cannot attach the panel or noises are generated

from the interfering fan.

B. When embedded into ceiling

1. Determine the positions of hanging bolts (530 x 530).

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

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

3. Fix the unit as per A-e ~ g previous page.

5) Drainage

¡ Glue the drain hose supplied as an accessory and a VP-25 joint before lifting

the unit.

¡ The drain hose is to provide a buffer to absorb a slight dislocation of the unit or

the drain piping during installation work. If it is subject to abuse such as being

bent or pulled deliberately, it may break, which will result in a water leak.

¡ Care must be taken so as not to allow an adhesive to run into the drain hose.

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

part receives stress.

¡ Use VP-25 general-purpose hard PVC pipes for drain piping. ¡ Insert the drain hose supplied as an accessory (soft PVC end) to the stepped

part of the unit's drain socket and then fasten it with the clamp also supplied as

an accessory.

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

PVC end) and then glue a VP-25 (to be procured locally) to the joint.

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

bump to go over or a trap.

¡ In connecting drain pipes, care must be taken so as not to apply force to the

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

¡ Do not create an air vent under any circumstances. ¡ When drain piping is implemented for more than one unit, provide a collecting

main about 100 mm below the units' drain outlets from which it collects drain.

Use a VP-30 or larger pipe for a collecting main.

¡ Do not fail to provide heat insulation at the following two points because they

can cause dew condensation and a resultant water leak.

• Drain socket

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

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

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

without leaving any gaps.

(Cut pipe covers into appropriate shapes)

• Hard PVC pipes laid indoor

¡ Since a drain pipe outlet can be raised up to 60 cm from the ceiling, use elbows,

etc. to install drain pipes, if there are obstacles preventing normal drain pipe

arrangement. When the drain pipe is raised at a point far from a unit, it can

cause an overflow due to a back flow of drain upon stoppage, so arrange pip-

ing to keep the dimensions specified in the illustration shown on the right.

¡ Install the drain pipe outlet where no odor is likely to be generated. ¡ Do not lead the drain pipe into a ditch where the generation of harmful gas

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

instruction may cause such harmful or flammable gas to flow into the room.

Notes • When a hanging bolt exceeds 1.3 m in length, use an M10 bolt and give it reinforcements such as braces.

Joint for VP-25

(not included)

Main frame

Drain socket

Pipe cover (small)

(For insulation) (Accessory)

Clamp (accessory) No adhesive allowed

Pipe cover (large)

(For insulation)

(Accessory)

Drain hose (accessory)

Joint for VP-25

(not included)

Adhesion

Pipe cover (For insulation)

(not included)

VP-25

(not included)

Drain socket Stepped part

Drain hose

bearer

1.5m ~ 2m

Insulation material

Descending slope greater than 1/100

Air vent

No bump

No trap

Not touching the water

Trapped air will generate noises.

295 ~ 325mm Less than 100mm

Drain hose

Less than 600mm

C. Attaching the panel

1) <Accessory items>

(It is attached to the panel.)

a) Make sure that the unit main body is positioned at the correct height and the opening on the ceiling is made to the

correct dimensions with the level gauge supplied with the main body.

Remove the level gauge before you attach the panel.

b) Screw in two bolts out of the four supplied with the panel by about slightly less than 5mm.( markAB)[Figure 1].

c) Attach the hook supplied with the panel to the main body with the hook fixing screw(1 screw).[figure 2] d) Open the intake grille. e) Please remove the screw of a corner panel and remove a corner panel.(four places) [Figure 3]

f) A panel is hooked on two bolts (¡markAB).[figure 4] g) Please rotate a hook, put in the slot on the panel, and carry out fixing the panel temporarily.[Figure 5]

h) Tighten the two bolts used for fixing the panel temporarily and the other two. i) Please open the lid of a control box. j) Please connect a louver motor connector and Display connector. [ Figure 6]

Piping side

[Figure 1]

[Figure 2]

Control box

Drain hose side

[Figure 3]

Corner panel

Screw

Hook

Chain

Screw

For fixing temporarily

For hoisting the panel

For attaching a hook

For attaching a chain

1 piece

2 pieces

4 pieces

1 piece

2 pieces

[Figure 5]

[Figure 4]

[Figure 6]

Display wiring

Display connector Louver motor connector

Louver motor wiring

k) Attach two chains to the intake grille with two screws. [ Figure 7] l) Replace the corner panels. Please also close a chain with a screw together then. m) Close the intake grille.

(3) Ducted type (SRRM)

(a) Caution for installation

Install the unit with the customer's consent at location that meets the following conditions.

1) Where there are no barriers to the breeze, and where cool/hot air may diffuse throughout the room.

2) A firm location that may sustain the weight of the unit, and do not cause the unit or the ceiling to vibrate.

3) A location that allows room for maintenance.

4) Where wiring and plumbing may be performed with ease.

5) Where water may be drained easily.

6) Where the unit is not influenced by the television, stereo, radio, or the lights.

7) Where the unit is not influenced by high frequency equipment and wiring equipment.

8) Where oil splashes do not occur frequently.

9) Where sunlight and strong lights do not directly hit the receiver.

10) A flat ceiling surface (bottom of ceiling).

(b) Installation of indoor unit

1) Installation dimensions

2) Drilling of holes in the wall and fixture of sleeve

The instructions for installation is the same as the SKM type. Please refer to page 46.

[Figure 7]

Chain

Liquid side pipes

740

35 35

670

Hanging bolt pitch

Plan

3030

455

515

Hanging bolt pitch

Front

740

106

11230

Side

455

Gas side pipes

150

236

Drain hose (Connection opening diameter ø16)

135

3) Preparations for the Main Frame

Mounting of interconnecting wires (Field wiring)

a) Remove the control lid.

b) Connect the connection wire securely to the terminal block.

1) Connect the connection wire securely to the terminal block.

If the wire is not affixed completely, contact will be poor,

and it is dangerous as the terminal block may heat up and catch fire.

2) Take care not to confuse the terminal numbers for indoor and outdoor connections.

3) Affix the connection wire using the wiring clamp.

c) Attach the control lid.

4) Securing the Ceiling Hanging Bolts

5) Filter guide set installation steps

• Please attach the provided filter guide set.(When an

option part (Lower suction grill set model RTS12)

is attached, no need to attach the filter guide set.)

a) Remove the filter bracket fixing screws from

the filter guide set first, and detach the filter

bracket and the air filter in that order.

b) Remove the screws(5 screws)from the main

unit.

c) Attach the filter guide to the main unit(with 14

fixing screws).

d) Attach the air filter onto the filter guide, and

then, attach the filter bracket and the filter

bracket fixing screws in that order.

Clamp

Control lid

Terminal block

1.5 Section of copper wire (mm

)

• Secure the ceiling hanging bolts firmly following the illustrations and other instructions.

If steel embedded ceiling

Inserts

Holed anchor Holed plug

Concrete

Hanging bolts M8

If wooden ceiling

Holes for ceiling hanging bolts

Square bars for hanging the air conditioner

Clamps

Beams

Unit main body

Tapping screw(14 screws)

Filter bracket fixing screw

Filter bracket

(Remove it temporarily)

Filter guide

Air filter

6) Installing the Main Unit

• Attach the washers and nuts to the ceiling hanging

bolts.

• Attach the hanging tool to the above nuts,

and tighten the nuts.

• If it is not leveled, the float switch may malfunction

or may not start

8) Connecting the Drain Hose

• Insert the drain hose as far possible through the lower section of the side of the unit,and secure it with clamps.

• The drain hose should be set in a downward slope (over 1/100), and it should not have any bumps or traps along its

route.

• When you are obliged to route the drain hose with a trap in its way or in an ascending gradient, please use an option part

Drain up kit(RDU12E).

• The indoor drain hose must be insulated.

7) Securing the Wireless Receiver

• With a(–)screwdriver, secure the installation frame to

the grooves on either sides of the wireless receiver.

• Refer to the installation instructions for each sepa-

rately sold part, regarding the installing location of

the wireless receiver.

Installation frame

Flat head

machine screw

Wireless receive

M8 nut

M8 large washer (standard accessory)

M8 spring lock washer

M8 nut

M8 hanging bolt

Main frame

Traps

Tapping screw

Drain hose

Clamp

Opposite

slope

Bumps

Conduct the installation correctly, and ensure that the water is draining correctly. It may lead to water leaks.

NOTE

5.5.2 Installation of remote control

(1) Mounting method of battery

Uncover the remote control switch, and mount the batteries (UM-4 × 2 pieces) in the

body regularly.

(Fit the poles with the indication marks, + & - without fail)

(2) Fixing to pillar or wall

(a) Conventionally, operate the remote control switch by holding in your hand.

(b) In the case of stationary operation service as by mounting on the holder for the

remote control switch, make sure that the locating place is satisfactory for access

service before installing it.

Wood screw

ø3.5 × 16

Remote control

switch

Battery

Cover

(2) Installation of outdoor unit

(a) Make sure that sufficient space for installation and service is secured.

(b) Fix the leg sections of the unit on a firm base which will not play.

Attach cushion pads, etc. between the unit and the mounting fixtures not to transmit vibration to the building.

(Drain elbow should not be used where days when temperature drops below 0°C continue for several days. Draining may be

disturbed by frozen water.)

(d) When installing the unit at a higher place or where it could be toppled with strong winds, secure the unit firmly with

foundation bolts, wire, etc.

5.5.3 Installation of outdoor unit

(1) Selection of installation location

(Please install with the customer’s consent in a location that follows the conditions listed below.)

(a) Where the following installation space is available, and where air does not gather.

(b) Where rain and sunlight do not directly hit the unit, and where there is enough air circulation.

A location which can sustain the weight of the unit, and where noises and vibrations are not enhanced.

(d) Where blasts of cold or hot air and noise do not bother the neighbors.

(e) Where the unit does not receive heat radiation from other heat sources.

(f) Where there are no obstructions (animals, plants, etc.) to the suction inlet and blowing outlet.

(g) Where water may drain out.

(h) Please avoid the following locations.

1) Where there is constant exposure to harsh winds such as the top floors of a building. Also, locations with exposure to

salty air.

2) Where there are oil splashes, vapor, and smoke.

3) Where there are possibilities of flammable gas leaks.

(i) Installation space (on a flat surface)

Snow hood

Height: Must be over the possible snow deposit height

Air inlet

Air Outlet

100

600

No obstacles (Service space for electrical parts)

Unit : mm

Notes (1) Blowing out port and suction port on the back side of the unit can be

installed at a distance of 10cm from walls.

In case the barrier is 1.2m or above in height, or is overhead, the

sufficient space between the unit and wall shall be secured.

(2) When the unit is installed, the space of the following dimension and

above shall be secured.

(j) In heating operation, snow deposit on the heat-exchanger of outdoor unit must be

prevented for keeping the normal performance capacity.

(i) Snow-hood on outdoor unit as in drawing, will reduce the frequency of defrost

operation.

When installing the snow hood, take care so that the air outlet of the snow

hood will not face directly into the most windy direction.

(ii) Design the base higher than possible snow deposit.

(

)

5.5.4 Electrical wiring

[POWER SUPPLY CODE]

CENELEC code for cables required field cables.

H05RNR3G4.0

(e) After connecting the power supply wires, make sure to secure the wires with wiring clamps.

(2) Connecting the outside/inside crossover wires

(a) Ensure that crossover wiring is matched with crossover piping in A, B and C rooms.

(b) Use the crossover wires specified below. Different wires may cause heat generation and fire. Do not to use unspecified wires.

[INTERCONNECTING WIRING CODE]

CENELEC code for cables required field cables.

H05RNR4G1.5

(d) After connecting the crossover wires to the terminal board, use wiring clamps to secure the wiring.

Use cables for interconnection wiring to avoid loosening of the wires. CENELEC code for cables Required field cables. H05RNR3G4.0 (Example) H Harmonized cable type 05 300/500 volts R Natural-and/or synth. rubber wire insulation N Polychloroprene rubber conductors insulation R Stranded core 3 Number of conductors G One conductor of the cable is the earth conductor (yellow/green)

4.0 Section of copper wire (mm

)

(1) Connection of the power lines

(a) This multi-type room air conditioner receives its power from outside.

(b) It is necessary to use a single phase 220/230/240 V 50 Hz for the power supply.

Their capacities are 25A.

(d) Use the power supply wires specified below. Different wires may cause heat generation and fire. Do not to use unspecified

wires.

Never bundle, wind or treat the power wires. Otherwise, heat or fire may be generated.

unit A unit B unit C

Outdoor unit

Circuit breaker

Earth leakage breaker

Indoor unit

5.5.5 Refrigerant Piping

(1) Limit

The maximum permissible length of the refrigerant pipes for the outdoor units, and the maximum permissible height difference for

the outdoor units are as shown below.

* If the total length for all the rooms exceeds the length of chargeless refrigerant pipe, additionally charge with refrigerant accord-

ing the item 4.

¡ The diameter of the refrigerant pipe:

¡ Outdoor unit and the total connectable indoor units (class kW):

Lower installation spot of the indoor unit A Upper installation spot of the indoor unit B Maximum height difference of the indoor units C

Length for one indoor unit

Total length for all rooms

Length of chargeless refrigerant pipe*

SCM60ZD-S

under 40m

under 10m

30m

under 25m

under 15m

under 25m

Height difference

Liquid side

Gas side

2.2 · 2.5 · 2.8 · 3.5kW

ø 9.52 · t 0.8

5.0 · 60 kW

ø 12.7 · t 0.8

ø 6.35 · t 0.8

Class of indoor unit (kW)

Diameter of joint pipe

Model

SCM60ZD-S

Total of indoor units (class kW)

11.0kW

(2) Connection of refrigerant piping

¡ The service valve corresponding to each indoor unit is as illustrated in the right figure.

¡ Regarding the change in the sizes of gas side pipes (usage of the variable joints); if a

5.0 and 6.0 kW class indoor unit (gas side pipe 12.7) is going to be connected to the

service valves (9.52), variable joints available as accessories must be applied to the

gas side service valves.

[Examples of use of variable diameter joints]

Connection of indoor unit of Class 5.0 to A unit.

¡ Securely fit the copper packing between the service valve and the variable diameter joint to prevent shifting.

¡ Cover the pipes with tape so that dust and sand do not enter the pipe until they are connected.

[Connection of pipes]

¡ When connecting the pipes to the outdoor unit, be careful about the discharge of fluorocarbon gas or oil.

¡ Make sure to match the pipes between the indoor unit and the outdoor unit with the correct service valves.

(1) Preparations

¡ Remove the flare nut (from both

liquid and gas sides).

¡ Remove the flare nut (from both

liquid and gas sides).

¡ Fit the removed flare nut to the joint pipe, and then flare it.

A dimensions

Liquid side: ø 6.35:9.1dia Gas side:

ø 9.52: 13.2dia ø 12.7: 16.6dia

Earth screw

Gas

Gas side service valve

Liquid

Liquid side service valve

Service valve for room C

Service valve for room B

Service valve for room A

ø9.52

ø6.35 pipe

ø12.7 pipe

Indoor unit

5.0 kW class

Liquid side service valve (ø6.35)

Gas side service valve (ø9.52)

Copper packing Variable diameter joint (ø9.52-ø12.7)

Service valve for room A

Indoor

Remove

Push

Outdoor

Remove

Push

90+0.5˚

(3) Air purging

(a) Remove the cap on both gas and liquid sides before starting operation. (b) After completing the operation, do not forget to tighten the cap (gas may leak). (c) Conduct air purging for all connected indoor units. ¡ Since the system uses service ports differing in diameter from those found on the conventional models, a charge hose (for R22)

presently in use is not applicable. Please use one designed specifically for R410A

Please use an anti-reverse flow type vacuum pump adapter so as to prevent vacuum pump oil from running back into the system. Oil running back into an air-conditioning system may cause the refrigerant cycle to break down.

Note: Fully open the service valves (on both liquid and gas sides) after completing air purging

To protect the global environment, use a vacuum pump that do not release flourocarbon gas into the atmosphere. When a vacuum pump cannot be used due to certain conditions for installation, sufficient refrigerant is available for air purging with refrigerant for the outdoor unit.

(4) Additional refrigerant charge

(a) When the total refrigerant pipe length for all the rooms exceeds the length of the uncharged pipe (30m), additional refrigerant

is required.

(If 30m or less, additional charge is not required.)

(b) For this multi type room air conditioner, it is not necessary to charge the refrigerant for the total maximum length in all the

rooms.

*1: Charge amount at the time of shipment.

Procedure

1 Secure all flare nuts on both indoor and outdoor

sides to prevent leaks from the pipes.

2 Connect the service valves, charge hose, manifold

valve and vacuum pump as shown in the right figure.

3 Fully open the handle Lo for the manifold valve,

and pump a vacuum for 15 minutes. Ensure that the meter is indicating -0.1 MPa (-76cmHg).

4 After vacuuming, fully open the service valve (both

liquid and gas sides) with a hexagon wrench.

5 Ensure that there are no gas leaks from the joints in

the indoor and outdoor units.

6 Repeat the above steps 1 ~ 5 for all connected

indoor units.

Model

SCM60ZD-S

Charged pipe length

(Amount of uncharged refrigerant) *1

Maximum total pipe length for all rooms

(Maximum amount of refrigerant)

On site additional charge

20g/m

30m (2200g)

40m (2400g)

Compound pressure gauge

Pressure gauge

Handle Hi

Handle Lo

-0.1MPa (-76cmHg)

Service valve for room B

Service valve for room A

Service valve (two-way valve)

Service valve (three-way valve)

Service Port

Open

Gauge Manifold (Designed specifically for R410A)

Charge hose (Designed specifically for R410A)

Vacuum pump

Vacuum pump adapter (Anti-reverse flow type). (Designed specifically for R410A)

Charge hose (Designed specifically for R410A)

(2) Connection

Indoor Outdoor

¡ Secure the nut with a specified tightening

torque to avoid any gas leaks.

¡ Secure the nut with a specified tightening

torque to avoid any gas leaks.

¡ When air purging with a vacuum pump,

secure the nut with a specified tightening torque to avoid any gas leaks.

¡ When air purging with a refrigerant from

an outdoor unit, just temporarily secure the nut.

¡ Specified tightening torques are as follows:

Liquid side (ø 6.35): 17mm in width across flat of the flare nut: 14.0-18.0 N·m (1.4-1.8 kgf·m) Gas side (ø 9.52): 22mm in width across flat of the flare nut: 34.0-42.0 N·m (3.4-4.2 kgf·m) Gas side (ø 12.7): 24mm in width across flat of the flare nut: 49.0-61.0 N·m (4.9-6.1 kgf·m)

Liquid side Gas side

Liquid side

Gas side

5.5.6 Test run and handling instruction

(1) Inspection

Check according to the following check items.

(2) Test run

(1) Conduct the test run after turning on the power for 20 minutes.

(To prevent compression of the compressor liquid.)

(2) If the compressor does not operate after the operation has started, wait for 5 ~ 10 minutes.

(This may be due to a delayed start.)

(3) Carry out the test run for each unit individually. (If 2 or 3 units are tested at the same time, wrong wiring and wrong pipe

connections cannot be checked.) (4) After each individual test, run the units in all the rooms simultaneously and check the units. (5) Test both the cooler and the heater.

(Three-minute restart preventive timer)

When the air conditioner is restarted or when changing the operation, the unit will not start operating for approximately 3

minutes. This is to protect the unit and it is not a malfunction.

Installation test check points

Check the following points again after completion of the installation, and before turning on the power. Conduct a test run again and ensure that the unit operates properly. At the same time, explain to the customer how to use the unit and how to take care of the unit following the instruction manual.

After installation Test run

□ The power supply voltage is correct as the rating. □ No gas leaks from the joints of the service valve. □ Power cables and crossover wires are securely inserted and fixed

to the terminal board.

□ Each indoor and outdoor unit is properly connected (no wrong

wiring or piping).

□ Service valve is fully open. □ Refrigerant has been additionally charged (when the total pipe

length exceeds the refrigerant charged pipe length).

□ The pipe joints for indoor and outdoor pipes have been insu-

lated.

□ Earthing work has been conducted properly.

□ Air conditioning and heating are normal. □ No abnormal noise. □ Water drains smoothly. □ Protective functions are not working. □ Operation of the unit has been explained

to the customer.

(5) Heat insulation for joint

Heat insulation for joints

Position so the slit comes on top.

Vinyl tape

Cover the joint with insulation material for the indoor unit and tape it.

SKM, SRRM models

STM model

After checking each flare joint of the indoor unit for gas leaks, cover it with the attached insulating material and firmly secure with the attached bands at both ends.

Do not twist or flatten pipes. Care must be taken so as to prevent debris,

chips and water from entering the piping during installation work.

Band(accessory)

Pipe cover (accessory)

Tapping screw

Drain hose

Exterior tape

Crossover wires

Pipes

Pipe clamp

Apply exterior tape and shape along

the place where the pipes will be rou-

ted. Secure to the wall with a pipe

clamp. Be careful not to damage the

pipes and the wires.

Finish and fixing

(a) Modifying the indoor unit’s printed circuit board

• Cut the jumper (printed “WIRED REMOCON”) attached on the board. It is impossible to control by the wireless remote control after cutting the jumper.

Jumper (WIRED REMOCON)

5.5.7 Installation of wired remote control and super link adapter (SC-AD-E) (Optional parts) (STM, SRRM only)

Notes (1) Controlling multiple indoor units using a single remote control.

● Up to 16 indoor units can be controlled with a single remote control.

a) Run 3-wire remote control lines between each of the indoor units. See “Cautions when extending remote control

lines” on page 62 concerning extended remote control lines.

b) Set the remote control communications address on “0” ~ “F” using rotary switch SW11 on the indoor unit’s control

board, taking care not to overlap the addresses of any of the units.

c) After turning the power on, press the AIR CON No. button to display the indoor unit’s address. Be sure to confirm

that the settings are displayed correctly in the remote control by using the

and

buttons to display the address

of each connected indoor unit.

(2) To connect the super link, the optional SC-AD-E (super link adapter) is required.

Beware of wrong connections in refrigerant piping and wiring

● Make sure to match the piping and wiring from each unit to the outdoor unit.

● Be careful because if connections are wrong, normal operation cannot be achieved and may damage the compressor.

[Correct connections] [Example of wrong connections]

A unit

A B C

B unit

C unit

Outdoor

unit

Indoor unit

Piping Wiring

A unit

B C

B unit

C unit

Outdoor

unit

Indoor unit (1) Address [0]

Red

White

Black

Remote controller

ZYX

Indoor unit (2) Address [1]

ZYX

Indoor unit (16) Address [F]

ZYX

Remote control signal line (with polarity) (Match up X , Y and Z when making connections.)

EXTERNAL INPUT

WIRED REMOCON

OPE PERMISSION CUSTOM

AUTO RESTART

LO TEMP

DIRT PREVENT

COOL ONLY

HI CEIL PANEL

50/60

SW12

J1 J2 J3 J4

WIRED REMOCON

2) Recessed fitting a) The Electrical box and remote control (shield wire

must be use in case of extension) are first embedded.

(b) Installation of wired remote control (Optional

parts)

(i) Selection of installation location

Avoid the following locations

1) Direct sunlight.

2) Close to heating device.

3) Highly humid or water splashing area.

4) Uneven surface.

(ii) Installation procedure

1) Exposed fiting a) Open the remote control case.

• Put a screw driver (flat-head) into the concavity

made on the upper part of a remote control unit and twist it lightly to open the casing.

b) The cord of a remote control unit can only be

pulled out in the upward direction.

• Cut off with nippers or a knife a thin walled part

made on the upper end of the remote control unit’s bottom casing, and then remove burrs with a file or the like.

c) Fix the remote controller unit’s bottom casing onto

a wall with two wood screws supplied as accessories.

d) Connect the remote control to the terminal block.

Connect the terminals of the remote control to the indoor unit with the same numbers. Because the terminal block has polarity, the device becomes inoperative if there are wrong connections.

Terminals: xRed wire, YWhite wire, ZBlack wire

• Use a cord of 0.3mm2 (recommended) - 0.5mm

(maximum) for a remote control unit cord. Remove a sheathe of the remote control unit cord for the section laid within the remote control unit casing. The length of each wire that should be left after a sheath is removed is as follows:

Black: 195mm, White: 205mm, Red: 215mm e) Replace the top casing as before. f) Use a cord clamp to attach the remote control cord

to the wall.

g) Set the functions according to the types of indoor

unit. See Section “Function Setting’’.

Thin walled part

Upper

Lower

Lower case

Upper

Lower

Lower case

Upper

Lower

Board

Wiring

XYZ

Red White Black

Upper case

Remote controller cord

Electrical box Not included

Upper

Lower

Cable outlet

Lower case

Upper

Lower

Cable outlet

Cut off with a knife or the like thin walled parts

intended for screw holes, and then fix it with

screws.

Two M4 screws (Head diameter must be 8mm) (not included)

(This side is not grounded)

Earth

Remote control switch

Remote control cord (Shielded wire)

Precation in Extending the Remote control cord

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

Within 100-200m

…………

Within 300m

…………

Within 400m

…………

Within 600m

…………

0.5 mm

0.75 mm

1.25 mm

2.0 mm

× 3 cores × 3 cores × 3 cores × 3 cores

Maximum total extension 600m.

▼

The cord should be a shielded wire.

● For all types : 0.3mm

× 3 cores

Note (1) Use cables up to 0.5mm

(maximum) for those laid inside the remote control unit casing and connect to a different size cable at a vicinity point outside the remote control unit, if necessary.

Indoor unit

Length of the section where a sheath is removed

b) Remove the upper case to the remote control. c) Attach the lower case to the Electricl box with

two M4 screws. (Head diameter must be 8 mm). Choose either of the following two positions in fixing it with screws.

d) Connect the remote cord to the remote control.

Refer to [Exposed Fitting]. e) Installation work is completed by replacing the

top casing onto the bottom casing as before.

f) Set the function switch according to the type of

the indoor unit.

Refer to [Function setting].

(i) The default settings of this unit's functions are as follows: If you want to charge a setting, follow the procedure found in the

installation manual and set to your desired setting.

For the method of setting, please refer to the installation manual of a remote control unit.

1 Remote control unit functions (

FUNCTION

)

2 Indoor unit functions (I/U FUNCTION

)

(01)

(09)

(11)

(18)

Default

setting

GRILLE SET

AUTO RUN SET

TEMP S/W

MODE S/W

ON/OFF S/W

FANSPEED S/W

LOUVER S/W

TIMER S/W

SENSOR S/W

VENTI SET

TEMP RANGE SET

I/U FAN SPEED

MODEL TYPE

EXTERNAL CONTROL SET

ERROR DISP SET

POSITION

°C/°F SET

INVALID

50Hz AREA ONLY

60Hz AREA ONLY

AUTO RUN ON

AUTO RUN OFF

VALID

INVALID

VALID

INVALID

VALID

INVALID

VALID

INVALID

VALID

INVALID

VALID

INVALID

SENSOR OFF (Invalid)

SENSOR ON (Valid)

INVALID

VALID

NO VENTI

VENTI LINK SET

NO VENTI LINK

DISP CHANGE

NO DISP CHANGE

3 FAN SPEED

2 FAN SPEED

1 FAN SPEED

HEAT PUMP

COOLING ONLY

INDIVIDUAL OPERATION

SAME OPERATION FOR ALL UNITS

ERROR DISP

NO ERROR DISP

FIX (1 OF 4) (4 position stop)

IN MOTION (Free stop)

°C

°F

Grille lift panel setting

Remote control sensor setting

Indoor unit fan speed setting

ON/OFF

Louver control setting

(01)

(03)

(07)

(08)

(09)

(10)

Function

number A

Default

setting

Hi CEILING SET

FILTER SIGN SET

POSITION

EXTERNAL INPUT SET

ROOM TEMP OFFSET

FAN CONTROL

FREEZE PREVENT TEMP

FREEZE PREVENT CONTROL

(Heating room temperature offset)

Heating fan control

Louver control setting

STANDARD (Mild mode)

Hi CEILING 1

(Powerful mode)

NO DISPLAY

AFTER 180H

AFTER 600H

AFTER 1000H

1000H→STOP

FIX (1 OF 4) (4 positiion stop)

IN MOTION (Free stop)

LEVEL INPUT

PULSE INPUT

NORMAL OPERATION

VALID

NORMAL OPERATION

TEMP SHIFT +3˚C

LOW FAN

STOP→LOW FAN (Intermittent operation)

TEMP Hi

TEMP Lo

FAN CONTROL ON

FAN CONTROL OFF

Function description

Setting

Function

number A

Function description

Setting

()

POWER FAILURE COMPENSATION SET

()

OPERATION PERMISSION PROHIBITED

Notes(1)

(2)

(3)

Setting marked with [⁄] are the default setting. Setting marked with [

] are those that are set automatically according to an indoor unit or an outdoor unit connected. Please check default settings with the indoor unit's installation manual. The items described in ( ) in the function number A cannot set .

Notes(1)

(2)

(3)

(4)

Setting marked with [⁄] are the default setting. Setting marked with [

] are those that are set automatically according to an indoor unit or an outdoor unit connected. Please check default settings with the indoor unit's installation manual. When Item 17 : “ POSITION” is changed, please also change Item 04 “ POSITION” setting found in “Indoor unit functions”. The items described in ( ) in the function number A cannot set .

(ii) Function setting method

1) Stop the air conditioner

2) Press the SET and MODE buttons simultaneously

for 3 seconds or longer.

The screen display will be switched as follows:

“

SELECT ITEM”

“

SET"

“FUNCTION SET

”

3) Press the SET button.

The unit will enter the function setting mode. The

screen display will charge to “

FUNCTION

”.

4) Check which category your desired setting belongs to, “

FUNCTION (Remote control unit function)” or “I/U

FUNCTION

" (Indoor unit function).

5) Press either or button.

Select either “

FUNCTION ” or “I/U FUNCTION ”.

6) Press the SET button.

When “

FUNCTION ” is selected.

1 “DATA LOADING” (blinking)

“ FUNCTION”

“01 GRILLE SET” (Function number: A, Function description: B)

The screen display will be switched like this.

2 Press either

or button.

“Function number: A, Function description: B “from the list of remote control unit functions will be displayed one by

one. Select a desired function.

3 Press the SET button.

The screen display will be switched as follows:

“

SETTING”

“Setting: C” (ex. “AUTO RUN ON”)

4 Press either

or button.

A list of “Settings: C” will be displayed one by one. Select your desired setting.

5 Press the SET button.

The selected setting is displayed

for 2 seconds, then followed by

“SET COMPLETE” and the

function setting process is

completed.

Then the screen display will be

swiched to “Function number: A, Function description: B,” so

if you want to continue to set an-

other function, repeat the steps as

explained above.

To finish the function setting pro-

cess, please proceed to Step (iii).

Operating guide message Function description: B , Settting: C

Function number: A

Previous screen buttonIndoor unit selector button

Confirm Button

Finish Button

Selector button

Start Button

AUTO RUN SET

AUTO RUN ON

AUTO RUN ON AUTO RUN OFF

SET COMPLETE

Function number: A

Function description: B

* When Ò AUTO RUN SET Ó is selected.

Setting: C

FUNCTION

I/U FUNCTION

FUNCTION SET

When “I/U FUNCTION ” is selected.

1 The screen display will be switched as follows:

“

I/U SELECT” “

SET” “I/U No.00” (blinking)

2 Press either

or button.

Select the indoor unit number that you want to change settings. If only one indoor unit is connected, the indoor unit number will not charge, so please proceed to Step 3. If “ALL I/U

” is selected while indoor group control is in effect, you can set all units to the same settings.

3 Press the SET button.

Indoor unit number indication will change from blinking to lit continuously, The screen display will be switched as follows: "DATA LOADING" (blinking for about 2 to 23 seconds)

“ FUNCTION” “05 EXTERNAL INPUT SET”

(Function number: A, Function description: B)

4 Press either or button.

“Function number: A, Function description: B” from the list of indoor unit functions will be displayed one by one. Select a desired function.

5 Press the SET button.

The screen display will be switched as follows: “

SETTING” “Setting: C” (ex. “LEVEL INPUT”)

6 Press either

or button.

A list “Setting: C” will be displayed one by one. Select your desired setting.

7 Press the SET button.

The selected setting is displayed for 2 seconds, then followed by “SET COMPLETE” and the function setting process is completed. Then the screen display will be switched to “Function number: A, Function description: B” so if you want to continue to set another function, repeat the stepa as explained above. To finish the function setting process, please proceed to Step 8.

8 Press AIR CON No. button.

The screen display will go back to the indoor unit selection screen (ex. “ I/U No.00”).

(iii) Press the ON/OFF button.

This ends a function setting process. Even if a function setting process is not completed, this ends the process. Please note that any setting that is not completed will become void.

¡ Pressing the RESET button during a function setting process will allow you to go back the previous

step. Please note that any setting that is not completed will become void.

¡ Method of checking the current setting

While following the above mentioned step, the setting that appears when the SET button is pressed for each “Function number: A, Function description: B” is the current setting “Stting: C”. (When "ALL I/U

" is selected, the setting of

the indoor unit with the lowest number is displayed)

¡ Settings are stored in the controller and not lost even a power outage occurs.

I/U No.00

* When

EXTERNAL INPUT SET is selected.

Function number: A

Function description: B

EXTERNAL INPUT SET

Settings: C

LEVEL INPUT

Function No. A

(Example) If the upper limit is set at 28˚C

Function Contents B Setting Contents C

TEMP RANGE SET

DISP CHANGE

NO DISP CHANGE

Control Contents

The remote control’s display and sent data upper limit changes to 28°C.

The remote control’s display upper limit remains at 30ºC and only the upper limit of the sent data is changed to 28°C.

(iv) Changing the remote control’s temperature setting range

1) The temperature setting range of the remote control can be changed.

Through remote control button operations, the upper limit and lower limit set temperature values can be changed individu-

ally.

During heating operation, the changed upper limit value becomes valid and at times other than during heating operation,

(during cooling, dehumidification, auto and fan operation), the changed lower limit value becomes valid.

Range of Possible Changes

Upper Limit Value: 22~30ºC (valid during heating) Lower Limit Value: 18 ~ 26ºC (valid at times other than during

heating)

2) Operation

a) With the remote control in the stopped state, press the SET and MODE buttons simultaneously for 3 seconds or

longer. The display will changed from “

SELECT ITEM”

“

SET”

“FUNCTION SET

”

b) Press the

button once. The display will change to TEMP RANGE

c) Press the SET button to enter the temperature range setting mode.

d) Using the

button, select “Hi LIMIT SET

” or “Lo LIMIT SET

,” the press the SET button.

e) If “Hi LIMIT SET” is selected,

1 The display changes from “

SET UP” “Hi LIMIT 22ºC ” (flashing).

2 Using the “

” button, select the upper limit value. Display example: “Hi LIMIT 22ºC ” (flashing)

3 Press the SET button to fix the setting. Display example: “Hi LIMIT 22ºC” (lighted up)

f) If “Lo LIMIT SET” is selected,

1 The display changes from “

SET UP” “Lo LIMIT 26ºC

” (flashing).

2 Using the “

” button, select the upper limit value. Display example: “Lo LIMIT 26ºC

” (flashing)

3 Press the SET button to fix the setting. Display example: “Lo LIMIT 26ºC” (lighted up)

g) Press the ON/OFF button to end the setting procedure.

(The procedure also ends if the ON/OFF button is pressed during the setting operation. However, settings which have

not been fixed become invalid, so exercise caution.)

• If the RESET button is pressed during a setting operation, the display returns to the previously displayed setting screen. However, settings which have not been fixed become invalid, so exercise caution.

*If “NO DISP CHANGE” is selected in No. 12, “TEMP RANGE SET” of the remote control’s functions, of the function

setting modes, the remote control’s display does not change even if the temperature range has been changed.

(d) SUPER LINK ADAPTER (SC-AD-E)

(i) Functions

1) Transmits the settings from the Super link option to the indoor units.

2) Returns the priority indoor unit data in response to a data request from the Super link option.

3) Inspects the error status of connected indoor units and transmits the inspection codes to the Super link option.

4) A maximum of 16 units can be controlled (if in the same operation mode).

(ii) Wiring connection diagram

SC-AD-E

Blue

Red

White

Black

Master/Slave address

Network address [00] ~ [47]

Connection to super link (total length of wires: 1000 m maximum)

0.75 ~ 2.0 mm

2-core

Connection to the terminal block for remote control (polar) (total length of wires: 600 m maximum)

No. Name ot the recommended signal wire

1 Shielding wire 2 Vinylcabtire round cord 3 Vinyl cabtire round cable 4 Control vinyl insulated, vinyl sheath cable

Master/Slave Address

SW 3-1

ON Master

OFF Slave

Shielding wires:

100 ~ 200 m ................. 0.5 mm

× 3-core wires

~ 300 m ................. 0.75 mm

× 3-core wires

~ 400 m ................. 1.25 mm2 × 3-core wires

~ 600 m ................. 2.0 mm

× 3-core wires

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

1) Set the super link network address with SW1 (10-position) and SW2 (1-position).

2) Without a remote control (no wired remote control and no wireless remote control), set SC-AD-E SW3-1 to ON (Master).

Outdoor unit

Internal/external Crossing

Indoor unit

Remote control

SC-AD-E

Network options

X Y Z

A B

Outdoor unit

Internal/external Crossing

Inside

Inside Inside Inside

SCAD-E

Network options

Outdoor unit

Internal/external Crossing

Inside

Inside Inside Inside

SCAD-E

Outdoor unit

Internal/external Crossing

Inside

Inside Inside

SCAD-E

Network options

Outdoor unit

Internal/external Crossing

Inside

SCAD-E

Network options

Basic Connections

Plural Controls by Multiple Remote Controls. Mixture of Multiple Units

* Transmit the information of plural “Master”

units to the network.

• Transmit the abnormalities of the “Slave” units to the network.

s Setting the plural “Master/Slave” units with the dip SW of the

printed circuit board.

s Setting the “Master/Slave” remote controls with the dip SW of

the remote control board.

Without Remote Control

Plural Controls by Multiple Remote Controls. Mixture of Multiple Units

s Set “00” ~ “47” with the address SW (rotary SW)

of the SC-AD-E.

s Set the SC-AD-E dip

SW to “Master” SW31 ON.

❈ The network option

SLA-1-E is not allowed (This will disturd switching of the operation mode)

(d) Installation procedure

1) Mount the duct for the air inlet grille to the indoor unit

using the 10 tapping screws provided. The tapping screws

on the drain pan receiver side are also used for mounting

the duct for the air inlet grille. They must first be removed

and reinstalled after the duct for the air inlet grille is in

place. A guideline for the height is to secure the assembly

so that the lower surface of the duct for the intake grille is

approximately 10 mm above the bottom surface of the

ceiling.

2) Remove the center screw for the air inlet grille and open

the grille as shown in the illustration. Next, insert the air

inlet grille into the duct for the air inlet grille and secure it

with the pan-head screws (the long screws).

3) Use the pan-head screws to make the small adjustments

in height. The height dimension on the installation dia-

gram allows for adjustment within range of 80 to 100 mm.

If the pan-head screws are completely tightened, the height

will be 80 mm.

5.5.8 Installation of optional parts (Ducted type)

Table of optional parts

Bottom air inlet grille set RTS12

1 Rear inlet filter set

RBF12

2 Duct joint for air outlet plate

RFJ22

3 Drain up kit

RDU12E

(1) Bottom air inlet grille set

(a) Part No.: RTS12 (b) Parts list

Name Qty.

Air inlet grille

Duct for air inlet grille

Tapping screw

Pan-head screws

740

Indoor unit

762 (Ceiling opening dimensions)

258 (Ceiling opening dimensions)

278 (Ceiling opening dimensions)

782 (Panel dimensions)

11 11.5455

Indoor unit

Ceiling surface

230

Air outlet side

80 ~ 100

(Drain pan receiver)

Pan-head screw

Air inlet grille

Tapping screw

Duct for air inlet grille

Indoor unit

Unit: mm

Indoor unit

(Flat surface drawing)

215 310 215 125

230

97 455

570

310130 130 97

Round duct connection port

95 95

190

ø 150

(3) Duct joint for air outlet plate

(a) Part No.: RFJ22

This duct joint is to be used for the connection of a round duct (ø 150 mm) to an indoor unit.

(b) Part list

(d) Installation procedure

Use the tapping screws to mount the duct joint to

the front of the indoor unit. Use care to prevent

gaps from forming at the joining surfaces with

the indoor unit. Use insulation at the connecting

areas between a round duct and the duct joint to

prevent condensation.

Name Qty.

Duct joint

Tapping screws

Heat insulation materials (15x15xt3)

Duct joint

Tapping screws

(8 locations)

Indoor unit

Unit: mm

(2) Rear inlet filter set

(a) Part No.: RBF12

(b) Installation

Do not use this filter set alone.

There are two inlet ports: lower inlet port (normal) and rear inlet port.

1) Detach the rear panel and the hanger metal screwad onto the rear

panel from an indoor unit.

2) Attach the removed hanger metal to the frame of the filter set with small panhead

screws. (One screw each on the right and left sides of the frame is designed to fasten them together onto the main unit).

3) Attach the filter set onto the point where the rear panel was attached with tapping screws. (The rear panel will become of

no use anymore)

Hanger metal

Bracket for filter fixing

Tappping screw

Indoor unit

Pan-head screw

Filter set

◆ Air flow and external static pressure characteristics (Heating: Hi) SRRM25ZE-S, 35ZE-S, 50ZE-S, 60ZE-S

◆

Air inlet grille air flow and friction loss characteristics (Part No.: RTS12)

Air flow (m3/min)

Pressure loss Pa (mm Aq)

2345678910

30(3)

20(2)

10(1)

Air flow (m3/min)

Static pressure Pa (mmAq)

8 9 10 11

Standard High

Standard Low

Standard Medium

60(6)

50(5)

40(4)

30(3)

20(2)

(4) Drain up kit

(a) Part No. : RDU12E (b) Accessories

(d) Installation of drain up kit

1) Fix the drain up kit on the right side of the

inside unit with tap screws.

2) Insert the drain hose fully and securely to

the drain sockets of the inside unit and the

drain up kit.

3) Connect the drain up kit’s connectors for the

drain pump (red color 2P) and the float

switch (black 2P) to the connectors of the

control box. (The control box’s connectors

for the drain pump and the float switch are

also red and blace respectively.) Note that

the control’s connector for the float switch

is already connected to the inside unit’s con-

nector for the float switch, so disconnect

them and connect it to the drain up kit’s con-

nector for the float switch and fix it with the wire clamp.

Name

Drain pump

Drain hose

Hose clamp

Tapping screw

No.

Qty.

455

Control

Fitting for drain hose

254

740

124

186

224

Max. 500

23024

Vinyl chloride pipe VP-25

267 176 62

VIEW A

Indoor unit

4 Tapping screw

2 Drain hose

For indoor unit For float switch

For drain pump

For indoor unit

Unit: mm

4) Use hard PVC general purpose pipes VP-25 sold on the market

for drain pipes after draining up.

5) Tighten the PVC pipe securely with the attached clamp after

inserting it in the drain socket.

6) The drain pipe must have downward inclination gradient of 1/

100 or more, and take care not to make a trap or uphill pass.

7) When connecting the drain pipe, take care not to apply force on

the pipe of the unit, and clamp the pipe as close as possible to

the unit.

8) Don’t attach air purge pipe, because the drain might spout.

9) Be sure to provide heat insulation to the indoor side drain pipe.

Drain hose

Down gradient (1/100 or more)

Up hill pass

Trap

3 Hose clamp

5.6 MAINTENANCE DATA

5.6.1 Trouble shooting

(1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models]

All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it

is necessary to understand the function controlled by a micro computer thoroughly, so as not to mistakenly identify correct opera-

tions as mis-operations. It is also necessary to perform the following simple checks before conducting detailed checks or exchang-

ing printed circuit board.

Before exchanging Printed circuit board

Claim call from the user

Ascertain the nature of the claim.

Ascertain the operation status.

Does the trouble occur again?

Is this nonsense claim?

Operate the unit.

Does the trouble occur again?

Temporarily turn off the power source and turn it on again in about 1 min. and turn the unit on again.

YES

Does the trouble occur again?

Disconnect connectors and connect them again.

Operate the unit again after confirming that the fuse and the varistor equipped on PCB does not burn out.

Carry out checks according to detailed check process (See later page)

Unit did not cool, etc.

¡ Is the power on? ¡ Is the thermostat setting correct?

(Not too high?)

¡ Is the unit in a timer operation? ¡ Does user understand function?

etc.

¡ Explain the function of the unit to user.

No need for PCB change

Check further the status when the trouble occurred (such as the timer of occurrence, power failures, thunder, use status of other electrical appliances, etc.). Clarify the reason for the problem and explain it thoroughly to the user.

No need for PCB change

Microcomputer runaway due to power source conditions is a possible cause.

No need for PCB change

The cause is defective connector contact.

YES

(2) Indication of self diagnosis

Indoor unit

indicator

Outdoor unit

indicator

(LED 5)

Wired remote control display (optional parts)

Description of

trouble

Cause Conditions of flashing

On for 4 seconds and off for 4 seconds

Outdoor heat exchanger sensor error

Indoor heat exchanger sensor (1) error

Room temperature sensor error

Outdoor air temperature sensor error

Current cut

Discharge pipe sensor error

Comp. suction sensor error

Over heat of compressor

Indoor heat exchange sensor (2) error

Closed service valve Indoor heat exchanger sensor (1) error

Indoor fan motor error

Broken discharge pipe sensor wire Connector poor connection

When heat exchanger sensor (1) temperature of –20 °C or under continued for more than 15 seconds while operation is stopped. (This is not displayed during operation.)

When room temperature sensor temperature of –20 °C or under continued for more than 15 seconds while operation is stopped. (This is not displayed during operation.)

When air conditioner is operating and indoor fan motor is turned ON, indoor fan motor speed of 300 rpm or under continued for more than 30 seconds. (Air conditioner stops.)

After cooling starts, when the temperature difference at the indoor heat exchanger sensor (1) after 13 minutes and after 16 minutes is greater than –2ºC, operation is stopped.

When outdoor air temperature

sensor

temperature of –20 °C or under continued for more than 10 seconds while operation is stopped. (This is not displayed during operation.)

When heat exchanger sensor temperature of –20 °C or under continued for more than 10 seconds while operation is stopped. (This is not displayed during operation.)

When converter output current which exceeds setting value is detected. (Compressor stops.)

When heat exchanger sensor (2) temperature of 20°C or under continued for more than 15 seconds while operation is stopped. (This is not displayed during operation.)

After the decision speed has been 0 rps or more for 9 continuous minutes and the discharge pipe sensor has sent a 10 second or more broken wire signal. (Compressor is stopped.)

When discharge pipe sensor value exceeds setting value. (Compressor Stops.)

•

Current safe stop

When the decision speed is 30 rps or less and the current save has operated. (Compressor stops)

Overload operation Overcharge

•

Gas shortage Defective discharge pipe

sensor

•

Error of signal transmission

If serial signal cannot be sent or received for 1 minute and 55 seconds continuously.

Defective power supply Broken signal wire Defective indoor/outdoor unit circuit boads.

•

Broken heat exchanger sensor (2) wire Connector poor connection Disconnected sensor

Drain abnormality (STM, SRRM only)

Float switch motion

•

Drain at reverse gradient Float switch defective

•

Closed service valve Heat exchanger sensor (1) is disconnected.

•

Broken comp. suction sensor wire Poor connector connection

When comp. suction sensor temperature of

-20°C or under continued for more than 10 seconds while operation is stopped.

•

Compressor lock

Defective compressor Defective outdoor PCB

When the motor for the compressor does not turn 1/12 revolution 0.044 second after it has been started.

•

Error of wired remote control wiring

Broken wired remote control wire Defective indoor unit boards

Broken heat exchanger sensor (1) wire Connector poor connection Disconnected sensor

•

Broken room temperature sensor wire Connector poor connection

•

Broken heat exchanger sensor wire Poor connector connection

•

Broken outdoor air temperature sensor wire Poor connector connection

•

Defective fan motor Connector poor connection

•

Compressor locking Open phase on compressor output Shortcircuit on power transistor

When an error with the outdoor unit causes an error stop, or when the input current is measured at 1 A or less for 3 continuous minutes or more. (Compressor is stopped.)

Defective power transistor. Broken compressor wire Compressor blockage

Trouble of outdoor unit

RUN light

1 time

flash

2 time

flash

4 time

flash

5 time

flash

6 time

flash

7 time

flash

Keeps

flashing

Keeps

flashing

Keep

flashing

Keep

flashing

Comes

2 time

flash

TIMER

light

Comes

1 time

flash

2 time

flash

4 time

flash

5 time

flash

1 time

flash

2 time

flash

3 time

flash

5 time

flash

6 time

flash

2 time

flash

E16

E38

E37

E39

E53

E42

E59

E58

E36

E60

The wired remote control wire Y is open. The wired remote control wires X and Y are reversely connected. Noise is penetrating the wired remote control lines. The wired remote control or indoor control PCB is faulty. (The communications circuit is faulty.)

Stays off

1 time flash

2 time flash

3 time flash

5 time flash

6 time flash

7 time flash

(3) Inspection procedures corresponding to detail of trouble

Sensor error

[Broken sensor wire, connector poor connection]

Is connector connection good?

YES

Replace PCB.

Is sensor resistance value good?

Correct connection.

Replace sensor.

40 50 60

–10

Temperature (˚C) Resistance (kΩ) Temperature (˚C) Resistance (kΩ)

0 164 70 8.7

5 127 75 7.3

10 99 80 6.2

15 78 85 5.3

20 62 90 4.5

25 50 95 3.9

30 40 100 3.3

35 32 105 2.9

40 26 110 2.5

45 21 115 2.2

50 17 120 1.9

55 14 125 1.6

60 12 130 1.4

65 10 135 1.3

◆ Sensor temperature characteristics (Room temp., indoor and outdoor unit heat exchanger temp., outdoor air temp., suction pipe temp.)

◆ Discharge pipe sensor temperature characteristics

Temperature (˚C)

(Shortcircuit)

(Broken wire)

Resistance (kΩ)

Current cut

[Open phase on compressor output terminal, compressor lock]

YES

¡ Check compressor wiring visually.

¡ Check insulation resistance. (1 MΩ or over)

¡ Check coil wire resistance. (Few Ω)

Does current cut operate when operating inverter with compressor wire disconnected?

Is output voltage applied to all 3 phases of power transistor?

Is there any shortcircuit?

Inspect compressor.

Defective inverter

Secure space for suction and blow out.

If check results are normal, compressor is locked.

Outdoor unit error

[Broken power transistor, broken compressor wire]

Is output voltage applied to all 3 phases of power transistor?

YES

Inspect compressor. (Broken coil wire)

Is compressor wiring connected securely?

Connect securely.

Current safe stop

[Overload operation, compressor lock, overcharge]

Defective inverter

Secure space for suction and blow out.

Discharge refrigerant.

Is refrigerant charge quantity adequate?

Is outdoor ventilation condition good?

Inspect compressor.

Defective inverter

YES

Compressor overheat

[Gas shortage, defective discharge pipe sensor]

Is discharge pipe sensor resistance value good?

Is sufficient quantity of refrigerant circulated?

Defective inverter

YES

Gas shortage

Connector connection check, resistance value check, replacement of discharge pipe sensor

Does trouble persist after charging gas?

Clogged capillary tube, etc.

Indoor fan motor error

[Defective fan motor, defective indoor PCB]

YES

Is connector connection good?

Is voltage applied to fan motor?

(Between White - Red)

Defective fan motor

Correct connector connection.

Defective indoor unit PCB

Compressor lock

[Defective compressor, defective outdoor PCB]

YES

¡ Check compressor wiring visually.

¡ Check insulation resistance. (1 MΩ or over)

¡ Check coil wire resistance. (Few Ω)

Is output voltage applied to all 3 phases of power transistor?

Inspect compressor.

Defective inverter

If check results are normal, compressor is locked.

Serial signal transmission abnormality

Is this a recurring error when resetting power supply?

Is the wiring connection between the indoor and outdoor unit improperly wired?

Is AC 220/230/240 V measured between terminals

and 2 on the outdoor unit?

Is the electrical system operating properly (fuse, reactor, etc.)?

Does the voltage between terminals 2 and 3 on the outdoor unit oscillate between approximately DC 0 and 12 volts?

Does the voltage between terminals 2 and 3 on the indoor unit oscillate between approximately DC 0 and 12 volts?

Correct indoor and outdoor unit connections.

Defective indoor unit circuit board.

Defective outdoor circuit board

This is due to a temporary cause (interference, etc.) and is not a failure of the unit.

Defective indoor unit circuit board. Inspect interconnection wire.

Inspect interconnection wire.

Replace fuse and reactor.

YES

(1)

Possible causes include interference from the lighting, spontaneous load interference, power supply interference and radial interference.

[Indoor/outdoor printed circuit board defect Outdoor power source abnormality]

Drain abnormality (STM, SRRM only)

[Drain piping defective, pump defect]

YES

Has an overflow developed?

Is the drain piping clogged or at the wrong gradient?

Is the float switch operating?

Indoor printed circuit board is defective.

Is there output for drain motor driver?

YES

Drain motor is defective. Inspect wiring.

Inspect float switch.

Repair and clean.

Indoor printed circuit board is defective.

YES

(4) Phenomenon observed after shortcircuit, wire breakage on sensor.

(a) Indoor unit

Phenomenon

Sensor

Shortcircuit Broken wire

Cooling Release of continuous compressor operation command

Heating Continuous compressor operation command is not released.

Cooling System can be operated normally.

Heating High pressure control mode (Inverter stop command)

(b) Outdoor unit

Phenomenon

Sensor

Shortcircuit Broken wire

Cooling System can be operated normally.

Heating Defrosting is not performed.

Cooling System can be operated normally.

Heating Defrosting is not operated.

All modes

Defrosting is performed for 10 minutes at approx. 1 hour.

Defrosting is performed for 10 minutes at intervals of approx. 30 minutes.

Compressor stop (There is no inverter output.)

Operation mode

Room temperature sensor

Continuous compressor operation command is not released.

Release of continuous compressor operation command

Continuous compressor operation command is not released. (Anti-frosting)

Hot keep (Indoor fan stop)

Heat exchanger sensor

Operation mode

Heat exchanger sensor

Outdoor air temperature sensor

Discharge pipe sensor

Compressor overload protection is disabled. (Can be operated.)

(5) How to make sure of remote control

Is remote

control

normal?

YES

Again pushing operating swith

Operating the unit?

Does

unit ON/OFF

button

operates?

Operating the unit.

YES

Remote control defects

Abnormality is not found.

MED

AUTO

HI POWER

ECONO

ON OFF

AM PM

(a) Press the reset switch of the remote control.

(b) If all LCD are displayed after zero (1) display, it is ba-

sically normal.

Replace the display.

Control problem on main unit

Is the unit

operable with remote

control?

Normal

Defective remote control

YES

(1)

Note (1) Check method of remote control

(6) Indoor electrical components inspection flowchart

Is there voltage between terminal blocks 1 and 2 ? (AC 220/230/240 V)

Indoor electrical components are normal.

Is there voltage between CNC (1) and (2) on the secondary side of the transformer? (Approx. 12 V)

Is the voltage between terminal blocks 2 and 3 oscillating between DC 0 and 12V?

Inspect power source for outdoor unit.

Replace fuse.

Replace the transformer.

Replace printed circuit board.

Is the fuse burnt out? (3.15 A)

YES

(7) Inverter failure diagnosis

If the results of the diagnosis in Item (3) indicate that the inverter is defective, perform the following inspection on the inverter.

(a) Diagnosis procedure

Is DC280V imposed between the power transistor P and N?

Is there output at CNN, CNH on the printed circuit bord (CPU)?

Is the voltage at U, V and W of

the power transistor?

Is the diode stack good?

Is condenser good?

Is there conducitvity in the inductor?

Is the fuse good?

Is the varistor good?

Is the noise filter good?

Fuse is defective e Replace

Varistor is defective e Replace

Noise filter is defective e Replace

The printed circuit board (CPU) is defective

e Replace

The printed circuit board (POWER) is defective

e Replace

The power transistor is defective e Replace

YES

Condenser is defective

e Replace

Inductor is defective

e Replace

The diode stack is defective

e Replace

YES

Inspect compressor

SWITCHING

POWER CIRCUIT

EEV-C

L-1

N-1

20S

CNI

RAM DATA

URD

PWB ASSY(POWER) PWB2

250V 20A

200V 2A

EEV-BEEV-A

Tho-D

Tho-A

Tho-R

Tho-C

HEATER

250V 20A

EARTH

1122

CNO

CNP

CNQ

CNB CNC

CND

CNJ CNK CNL

CNG

P_1N_1

P_1

123456 123456 123456

CNN CNH

1234567891011121312345

12345 12345678910111213

PWB ASSY(CAPACITOR) PWB3

PWB ASSY(CPU) PWB1

DC-P

DC-N

C1 C2 C3 C4

IC12 Q11

BK RD

L-OUT2

AC.L

AC.N

N-OUT2

CNG

CNH

DS1

AF-L2

N_3

AF-L1

OR OR

Y/G

Y/G Y/G

Power source

1 Phase

220/230/240V

Unit

Black

Red

White

Yellow/Green

Blue

Yellow

Brown

Gray

Orange

Y/GN

Color symbol

LED4

Unit A

LED5

ERROR

LED2

Unit C

LED3

Unit B

FMo

CNS

CAP1

CAP2

COM

CFO

● Inspection of resistance value of discharge-

pipe sensor.

Remove the connector and check the resistance value.

See the section of sensor characteristics on page 75.

● Inspection of electronic expansion valve

To test if there is voltage.

(Voltage is only applied to the electronic expansion valve when the valve angle is be-

ing changed.)

Red to white

Red to Orange

Brown to yellow

Brown to blue

If the expansion valve does not operate as shown above, it is defective.

Normal if there is approximately DC 5 V 10 seconds

after the power supply is turned on.

}

● Display lamp inspection

• LED 5 (Abnormality display lamp - Red)

• LED 2 to 4: (Light display for each room -

Green)

ON or flashing: Protection function operating

ON when there is a serial signal being re-

ceived among each of the indoor units.

OFF during ignition, stop (including no

connection), abnormality

Tester probe

∞

Normal

condition

+ (OR)

~ (BL)

~ (GR)

~ (BL)

~ (GR)

– (BK)

(When tester probes

are inverted, the read-

ing should be approx.

10~20Ω.)

● Inspection of diode stack (DS1)

● Power supply and serial

signal inspection

1 to 2: AC220/230/240V

2 to 3: Normal if the voltage

oscillates between DC

0 and approx. 12V

● Inspection of inductor conductivity

Remove the connector and check for conductivi-

ty. It must be conductive.

● Inspect power

transistor.

Remove the fasten termi-

nal and test output vol-

tage.

Check fuse. There should be conductivity.

Approx. DC 280 V

CAUTION – HIGH VOLTAGE

(b) Outdoor unit inspection points

High voltage is produced in the control box. Don't touch

electrical parts in the control box for 5 minutes after the

unit is stopped.

u * Check these points with the power supply on.

SSCM60ZD-S

Liquid side

Gas side

Check joint

Service hose

Charge hose

Vacuum pump

Refrigerant cylinder

Gauge manifold

5.6.2 Servicing

(1) Evacuation

The evacuation is an procedure to purge impurities ...... noncondensable gas, air, moisture from the refrigerant equipment by using

a vacuum pump. Since the refrigerant R410A is very insoluble in water, even a small amount of moisture left in the refrigerant

equipment will freeze, causing what is called water clogging.

¡ Evacuation procedure

(a) Check to ensure that there is no internal pressure in the unit. If there is an internal pressure, it

should be relieved through the check joint.

(b) Connect the service hoses of the gauge manifold to the check joint of the gas & liquid piping.

. Repeat evacuation in the following sequence.

Stop the vacuum pump.

(2) Refrigerant charge

(a) Discharge refrigerant entirely from the unit and evacuate the unit.

Note: Addition of refrigerant without evacuation is unreasonable, because it will result in low charge or overcharge.

(b) Keep the gauge manifold and connect a refrigerant cylinder to the unit.

(c) Record the weight of the refrigerant cylinder on the balance. This is necessary for making sure of the charged refrigerant

amount.

(d) Purge air from the charge hose

Firstly loose the connecting portion of the charge hose A at the gauge manihold side and open the valve 3 for a few

seconds, and then immediately retighten it after observing that gas is blow out from the loosened portion.

(e) Open the valve 1 and 3 after discharging air from the charge hose

, then the liquid refrigerant begins flowing from the

cylinder into the unit. Be sure to erect the refrigerant cylinder upright to let liquid refrigerant flow into the unit.

(f) When refrigerant has been charged into the system to some extent, refrigerant flow becomes stagnant, when that happens,

start the compressor in cooling cycle until the unit is filled with refrigerant to the specified weight.

(g) Making sure of the refrigerant amount, close the valve 3.

(h) Disconnect the charge hose from the unit. Cover the valve ports of the refrigerant piping with caps and tighten them securely.

(i) Check for gas leakage applying a gas leak detector along the piping line.

(j) Start the air conditioner and make sure of its operating condition ...... high side and low side pressures and temperature

difference between suction air and outlet air.

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 the vacuum condition.

Start the vacuum pump.

Compound pressure gauge indicates –0.1 MPa (–76 cmHg)

Operate the vacuum pump for more than 15 minutes after –0.1 MPa ( –76 cmHg) is indicated.

Close low pressure valve 1 of gauge manifold.

Elektronika SKM25ZD-S, SKM22ZD-S, STM25ZE-S, SRRM25ZE-S, STM35ZE-S User Manual

Specifications and Main Features

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