Electra K 25 DCI INV, K 35 DCI INV, ONG 35 DCI INV, ONG 25 DCI INV, K 35S DCI INV Service Manual

Service Manual

K DCI Inverter series

Indoor Units Outdoor Units

K 25 DCI INV ONG 25 DCI INV

K 35 DCI INV ONG 35 DCI INV

K 35S DCI INV ONG 35S DCI INV

K 50 DCI INV ONG 50 DCI INV

REFRIGERANT

R410A

DECEMBER 2004

HEAT PUMP

LIST OF EFFECTIVE PAGES

LIST OF EFFECTIVE PAGES

Note: Changes in the pages are indicated by a “Revision#” in the footer of each effected page

(when none indicates no changes in the relevant page). All pages in the following list represent
effected/ non effected pages divided by chapters.

Dates of issue for original and changed pages are:

Original .......1 ........ 15 January 2005

Total number of pages in this publication is 70 consisting of the following:

Page
No.

Title ....................... 0

A ........................... 0

i ............................. 0

1-1 - 1-4 ................ 0

2-1 - 2-4 ................ 0

3-1 - 3-2 ................ 0

4-1 - 4-2 ................ 0

5-1 - 5-12 .............. 0

6-1 - 6-8 ................ 0

7-1 - 7-2 ................ 0

8-1 - 8-2 ................ 0

9-1 - 9-2 ................ 0

10-1-10-2 .............. 0

11-1-11-16 ............. 0

12-1-12-8 .............. 1

13-1-13-10 ............ 0

Appendix -A ...........0

Revision
No. #

Page
No.

Revision
No. #

Page
No.

Revision
No. #

• Zero in this column indicates an original page.

*Due to constant improvements please note that the data on this service manual can be modified with out notice.
**Photos are not contractual.

A

Revision Y05-02

Service Manual − K DCI

TABLE OF CONTENTS

Table of Contents

1. INTRODUCTION ...................................................................................................1-1

2. PRODUCT DATA SHEET ......................................................................................2-1

3. RATING CONDITIONS ..........................................................................................3-1

4. OUTLINE DIMENSIONS .......................................................................................4-1

5. PERFORMANCE DATA .......................................................................................5-1

6. PRESSURE CURVES ...........................................................................................6-1

7. ELECTRICAL DATA ..............................................................................................7-1

8. WIRING DIAGRAMS .............................................................................................8-1

9. REFRIGERATION DIAGRAMS .............................................................................9-1

10. TUBING CONNECTIONS ......................................................................................10-1

11. CONTROL SYSTEM .............................................................................................11-1

12. TROUBLESHOOTING ..........................................................................................12-1

13.

EXPLODED VIEWS AND SPARE PARTS LISTS .................................................13-1

14. APPENDIX A

Revision Y05-02Service Manual - K DCI

i

1. INTRODUCTION

CONTENTS

1.1 General

The new K DCI INVERTERS split Cassette range comprise the following RC (heat
pump) models:

• K 25 DCI INV

• K 35 DCI INV

• K 35S DCI INV

• K 50 DCI INV

The New DCI K units can be easly fitted to resedential and comercial aplications
featuring esthetic design, compact dimensions, and low noise operation.

1.2 Main Features

INTRODUCTION

The K DCI INV series benefits from the most advanced technological innovations,
namely:

• DC Inverter technolegy

• R410a

• High COP (level A)

• Lego Concept

• Pre-Charged units up to the max’ alowing tubing distance

• Networking system connectivity

• Base heater connection

• Cooling operation at outdoor temperature down to -10ºC

• Heating operation at outdoor temperature down to -15ºC

• Bended indoor coil with treated aluminum fins and coating for improved

efficiency.

• Easy access to the interconnecting tubing and wiring connections.

• Automatic treated air sweep.

• Low indoor and outdoor noise levels.

• Easy installation and service.

Revision Y05-02Service Manual - K DCI

1-1

INTRODUCTION

CONTENTSCONTENTS

1.3 Filtration

The WNG DCI INV series presents several types of air filters:

• Easily accessible, and re-usable pre-filters (mesh)

• Pre-charged electrostatic filter (disposable)

• Active carbon filter (disposable)

1.4 Control

The microprocessor indoor and outdoor controllers, and an infrared remote control,
supplied as standard, provide complete operating function and programming.

Remote controlers: RC-2/3/4/5/7, RCW, µBMS

Networking system AircoNet version 4.2 and up, MIU SW version H8 and up
For further details please refer to the Operation Manual, Appendix A.

1.5 Outdoor Unit

The K DCI INV outdoor units can be installed as floor or wall mounted units by using a
wall supporting bracket. The metal sheets are protected by anti- corrosion paint work
allowing long life resistance. All outdoor units are pre-charged. For further information
please refer to the Product Data Sheet, Chapter 2.

• ONG 25 DCI

• ONG 35 DCI

• ONG 50

Outdoor Unit Features:

Features ONG 25,35, 50, DCI

Display 3 LED’s
Base Heater Optional
Outdoor Fan Variable Speed DC Inverter

M2L cable Port No

1.6 Tubing Connections

Flare type interconnecting tubing to be produced on site.
For further details please refer to the Installation Manual, Chapter 9.

1.7 Accessories

1.8 Inbox Documentation

1-2

• MIU (K) MODBUS Interface Unit

• Base heater

• M2L cable

Each unit is supplied with its own installation and operation manuals.

Revision Y05-02 Service Manual - K DCI

1.9 Matching Table

CONTENTSCONTENTS

1.9.1 R410A

OUTDOOR UNITS

MODEL REF” WNG25DCI WNG35 DCI K25 DCI K35 DCI K35S DCI K50 DCI

INTRODUCTION

INDOOR UNITS

ONG 25 DCI R410A

ONG 35 DCI R410A

0NG 50 DCI R410A

√√

√√√

√

The above table lists outdoor units and K indoor units which can be matched together. In addition
the listed outdoor units can be matched with other types of indoor units such as wall mounted,
For further information please refer to the relevant Service Manual.

Revision Y05-02Service Manual - K DCI

1-3

PRODUCT DATA SHEET

CONTENTSCONTENTS

2. PRODUCT DATA SHEET

2.1 K25 DCI

Model Indoor Unit K25 DCI
Model Outdoor Unit ONG25 DCI

Installation Method Flare

Characteristics Units Cooling Heating

(1)

Capacity

Power Input

COP

Energy Efficiency Class A A

Power Supply V/Ph/Hz

Rated Current A

Starting Current A

Circuit Breaker Rating A 16

INDOOR

OUTDOOR

Operation Control Type IR Remote Control

(1)

(1)

W

W/W

Fan Type & Quantity Centrifugal*1

(2)

Airflow

H/M/L m3/hr

External Static Pressure Min-Max Pa N/A

Sound Power Level

Sound Pressure Level

Moisture Removal L/hr

Condensate Drain Tube I.D. mm 16

Dimensions W/H/D mm 571 287 571

Weight kg 22.7

Package Dimensions W/H/D mm 685 415 685

Units per Pallet Units 10

Stacking Height Units 5

Refrigerant Control Electronic Expansion Valve

Compressor Type, Model Single Rotary DC Inverter Panasonic 5RS102XAB

Fan Type & Quantity Axial *1

Airflow H m3/hr 1780

Sound Power Level H dB (A) 60 61

Sound Pressure Level

Dimensions W/H/D mm 795 610 290

Weight kg 40

Package Dimensions W/H/D mm 945 655 393

Units per Pallet Units 9

Stacking Height Units 3

Refrigerant Type R410A

Refrigerant Chargeless Distance g 1100

Additional Charge Per 1 Meter g/m No Need

Connections
Between Units

(3)

H/L dB (A)

(4)

H/L dB (A)

(4)

H dB (A) 50 51

Liquid Line

Suction Line

Max. Tubing Length m 20

Max. Height Difference m 10

Btu/hr

W

(mm)In

(mm)In

8530 (5120-12970) 11600 (5120-17060)

2500 (1500 - 3800) 3400 (1500 - 5000)

590 (420-1000) 915 (400-1500)

4.24 3.72

220-240V / 1Ph / 50Hz

2.7 4.2

10.50

570-500-435 600-530-450

42-48 42-47

32-38 32-37

1.0

(6.35)

¼”

(9.53)

”

(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.

Revision Y05-02Service Manual - K DCI

2-1

PRODUCT DATA SHEET

CONTENTSCONTENTS

2.2 K35 DCI

Model Indoor Unit K35 DCI
Model Outdoor Unit ONG35 DCI

Installation Method Flare

Characteristics Units Cooling Heating

Capacity

Power Input

COP

Energy Efficiency Class A A

Power Supply V/Ph/Hz

Rated Current A

Starting Current A

Circuit Breaker Rating A 16

Operation Control Type IR Remote Control

(1)

(1)

(1)

INDOOR

OUTDOOR

W

W/W

Fan Type & Quantity Centrifugal*1

(2)

Airflow

H/M/L m3/hr

External Static Pressure Min-Max Pa N/A

Sound Power Level

Sound Pressure Level

Moisture Removal L/hr

Condensate Drain Tube I.D. mm 16

Dimensions W/H/D mm 571 287 571

Weight kg 24.4

Package Dimensions W/H/D mm 685 415 685

Units per Pallet Units 10

Stacking Height Units 5

Refrigerant Control Electronic Expansion Valve

Compressor Type, Model Single Rotary DC Inverter Panasonic 5RS102XAB

Fan Type & Quantity Axial *1

Airflow H m3/hr 1780

Sound Power Level H dB (A)

Sound Pressure Level

Dimensions W/H/D mm 795 610 290

Weight kg 40

Package Dimensions W/H/D mm 945 655 393

Units per Pallet Units 9

Stacking Height Units 3

Refrigerant Type R410A

Refrigerant Chargeless Distance g 1200

Additional Charge Per 1 Meter g/m No Need

Connections
Between Units

(3)

H/L dB (A)

(4)

H/L dB (A)

(4)

H dB (A)

Liquid Line

Suction Line

Max. Tubing Length m 20

Max. Height Difference m 10

Btu/hr

W

(mm)In

(mm)In

11940 (5100 - 14960) 14620 (5100 - 18700)

3500 (1500 - 4400) 4300 (1500 - 5500)

950 (420-1250) 1330 (400-1850)

3.68 3.23

220-240V / 1Ph / 50Hz

4.1 5.6

10.50

580-510-435 620-560-450

42-48 42-47

32-38 32-37

1.5

62 62

52 52

¼”

(6.35)

(9.53)

”

(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.

2-2

Revision Y05-02 Service Manual - K DCI

PRODUCT DATA SHEET

CONTENTSCONTENTS

2.3 K35S DCI

Model Indoor Unit K35S DCI
Model Outdoor Unit ONG35 DCI

Installation Method Flare

Characteristics Units Cooling Heating

Capacity

Power Input

COP

Energy Efficiency Class A A

Power Supply V/Ph/Hz

Rated Current A

Starting Current A

Circuit Breaker Rating A 16

Operation Control Type IR Remote Control

(1)

(1)

(1)

INDOOR

OUTDOOR

W

W/W

Fan Type & Quantity Centrifugal*1

(2)

Airflow

H/M/L m3/hr

External Static Pressure Min-Max Pa N/A

Sound Power Level

Sound Pressure Level

Moisture Removal L/hr

Condensate Drain Tube I.D. mm 16

Dimensions W/H/D mm 571 287 571

Weight kg 24.4

Package Dimensions W/H/D mm 685 415 685

Units per Pallet Units 10

Stacking Height Units 5

Refrigerant Control Electronic Expansion Valve

Compressor Type, Model Single Rotary DC Inverter Panasonic 5RS102XAB

Fan Type & Quantity Axial *1

Airflow H m3/hr 1780

Sound Power Level H dB (A)

Sound Pressure Level

Dimensions W/H/D mm 795 610 290

Weight kg 40

Package Dimensions W/H/D mm 945 655 393

Units per Pallet Units 9

Stacking Height Units 3

Refrigerant Type R410A

Refrigerant Chargeless Distance g 1200

Additional Charge Per 1 Meter g/m No Need

Connections
Between Units

(3)

H/L dB (A)

(4)

H/L dB (A)

(4)

H dB (A)

Liquid Line

Suction Line

Max. Tubing Length m 20

Max. Height Difference m 10

Btu/hr

W

(mm)In

(mm)In

11940 (5800 - 16380) 15300 (5780-19720)

3500 (1700 - 4800) 4500 (1700 - 5800)

870 (460 - 1300) 1180 (350-1580)

4.02 3.81

220-240V / 1Ph / 50Hz

4.0 5.4

10.50

580-510-435 620-560-450

42-49 42-48

32-38 32-38

1.5

62 62

52 52

¼”

(6.35)

(9.53)

”

(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.

Revision Y05-02Service Manual - K DCI

2-3

PRODUCT DATA SHEET

CONTENTSCONTENTS

2.4 K50 DCI

Model Indoor Unit K50 DCI
Model Outdoor Unit ONG35 DCI

Installation Method Flare

Characteristics Units Cooling Heating

Capacity

Power Input

COP

Energy Efficiency Class A A

Power Supply V/Ph/Hz

Rated Current A

Starting Current A

Circuit Breaker Rating A 16

Operation Control Type IR Remote Control

(1)

(1)

(1)

INDOOR

OUTDOOR

W

W/W

Fan Type & Quantity Centrifugal*1

(2)

Airflow

H/M/L m3/hr

External Static Pressure Min-Max Pa N/A

Sound Power Level

Sound Pressure Level

Moisture Removal L/hr

Condensate Drain Tube I.D. mm 16

Dimensions W/H/D mm 571 287 571

Weight kg 28

Package Dimensions W/H/D mm 685 415 685

Units per Pallet Units 10

Stacking Height Units 5

Refrigerant Control Electronic Expansion Valve

Compressor Type, Model SCROLL Panasonic 5CS130XCC03

Fan Type & Quantity Axial *1

Airflow H m3/hr 2160

Sound Power Level H dB (A)

Sound Pressure Level

Dimensions W/H/D mm 795 610 290

Weight kg

Package Dimensions W/H/D mm 945 655 393

Units per Pallet Units 9

Stacking Height Units 3

Refrigerant Type R410A

Refrigerant Chargeless Distance g 1500

Additional Charge Per 1 Meter g/m No Need

Connections
Between Units

(3)

H/M/L dB (A)

(4)

H/M/L dB (A)

(4)

H dB (A)

Liquid Line

Suction Line

Max. Tubing Length m 30

Max. Height Difference m 10

Btu/hr

W

(mm)In

(mm)In

17060 (4610 – 21840) 21500 (4610 - 25590)

5000 (1350 – 6400) 6300 (1350 – 7500)

1550 (530 – 2000) 1740 (350 – 2080)

3.23 3.62

220-240V / 1Ph / 50Hz

7.1 8.0

10.50

730-630-510

46 – 55 - 59

36 – 44 - 48.5

2

62 63
52 53

43

(6.35)

¼”

(12.7)

½”

2-4

(1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.

Revision Y05-02 Service Manual - K DCI

3. RATING CONDITIONS

CONTENTSCONTENTS

Standard conditions in accordance with ISO 5151, ISO 13253 (for ducted units)
and EN 14511.

RATING CONDITIONS

Cooling:

Indoor: 27
Outdoor: 35

o

C DB 19oC WB

o

C DB

Heating:

Indoor: 20
Outdoor: 7

o

C DB

o

C DB 6oC WB

3.1 Operating Limits

Cooling

Heating

Voltage

Upper limit

Lower limit 21oC DB 15oC WB -10oC DB

Upper limit

Lower limit 10oC DB -15oC DB -16oC WB

1PH

3PH N/A

Indoor Outdoor

32oC DB 23oC WB 46oC DB

27oC DB 24oC DB 18oC WB

198 – 264 V

Revision Y05-02Service Manual - K DCI

3-1

4. OUTLINE DIMENSIONS

CONTENTSCONTENTS

4.1 Indoor Unit: K 25, 35, 35S, 50 DCI

OUTLINE DIMENSIONS

4.2

Outdoor Unit: ONG 25, 35, 35S, 50 DCI

Revision Y05-02Service Manual - K DCI

4-1

5. PERFORMANCE DATA

CONTENTSCONTENTS

5.1 K25 DCI

5.1.1 Cooling Capacity (kW) - Run Mode

PERFORMANCE DATA

OD COIL

ENTERING AIR DB

TEMPERATURE [C

-10 - 20

(protection range)

25

30

35

40

46

ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC]

DATA

0

]

22/15 24/17 27/19 29/21 32/23

TC 80 - 110 % of nominal
SC 80 - 105 % of nominal

PI 25 - 50 % of nominal
TC 2.42 2.57 2.73 2.89 3.05
SC 2.09 2.13 2.18 2.22 2.26

PI 0.46 0.47 0.48 0.49 0.50
TC 2.30 2.46 2.62 2.77 2.93
SC 2.04 2.08 2.12 2.17 2.21

PI 0.52 0.53
TC 2.18 2.34

0.54

2.50

0.54 0.55

2.66 2.82

SC 1.98 2.03 2.07 2.11 2.16

PI 0.57 0.58
TC 2.07 2.23

0.59

2.38

0.60 0.61

2.54 2.70

SC 1.93 1.97 2.02 2.06 2.10

PI 0.63 0.64 0.64 0.65 0.66
TC 1.93 2.09 2.24 2.40 2.56
SC 1.87 1.91 1.95 2.00 2.04

PI 0.69 0.70 0.71 0.72 0.73

LEGEND

TC – Total Cooling Capacity, kW
SC – Sensible Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (
DB – Dry Bulb Temp., (

o

o

C)

C)

ID – Indoor
OD – Outdoor

5.1.2 Capacity Correction Factors

Cooling Capacity Ratio Vs. Outdoor Temperature

1.2

1.1

1

0.9

0.8

0.7

Capacity Ration

0.6

0.5

20 25 30 35 40 45

Outdoor T emperature [deg C]

Revision Y05-02Service Manual - K DCI

5-1

PERFORMANCE DATA

CONTENTSCONTENTS

5.1.3 Heating Capacity (kW) - Run Mode

ID COIL ENTERING AIR DB TEMPERATURE [ºC]

OD COIL

ENTERING AIR DB/

WB TEMPERATURE

[ºC]

-15/-16

-10/-12

-7/-8

-1/-2

2/1

7/6

10/9

15/12

15-24

(Protection Range)

DATA 15 20 25

TC 2.16 2.01 1.86

PI 0.55 0.60 0.66

TC 2.41 2.26 2.11

PI 0.66 0.72 0.77

TC 2.59 2.44 2.29

PI 0.75 0.80 0.86

TC 2.68 2.53 2.38

PI 0.79 0.84 0.90

TC 2.75 2.59 2.44

PI 0.82

TC 3.55

PI 0.86

TC 3.75

PI 0.91 0.97 1.02

TC 3.94 3.79 3.64

PI 0.96 1.02 1.07

TC 85 - 105 % of nominal

PI 80 - 120 % of nominal

0.87

3.40

0.92

3.60

0.93

3.25

0.97

3.44

LEGEND

TC – Total Cooling Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (
DB – Dry Bulb Temp., (

o

o

C)

C)

ID – Indoor
OD – Outdoor

5.1.4 Capacity Correction Factors

Heating Capacity Ratio Vs. Outdoor Temperature

1.2

1.1

1

0.9

0.8

0.7

Capacity Rat ion

0.6

0.5

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [deg C]

5-2

Revision Y05-02 Service Manual - K DCI

PERFORMANCE DATA

CONTENTSCONTENTS

5.2 Capacity Correction Factor Due to Tubing Length

5.2.1 Cooling

1.01

1.00

0.99

0.98

0.97

0.96

0.95

0.94

Capacity Ratio

0.93

0.92

0.91

3 4 5 6 7 8 9 1011121314151617181920

Tubing Length [m]

5.2.2 Heating

1.02

1.00

0.98

0.96

0.94

Capacity Ratio

0.92

0.90

34567891011121314151617181920

Tubing Length [m]

Revision Y05-02Service Manual - K DCI

5-3

PERFORMANCE DATA

CONTENTSCONTENTS

5.3 K35 DCI

5.3.1 Cooling Capacity (kW) - Run Mode

OD COIL

ENTERING AIR DB

TEMPERATURE [ºC]

-10 - 20

(protection range)

25

30

35

40

46

ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC]

DATA

22/15 24/17 27/19 29/21 32/23

TC 80 - 110 % of nominal

SC 80 - 105 % of nominal

PI 25 - 50 % of nominal

TC 3.38 3.60 3.83 4.05 4.27
SC 2.65 2.70 2.75 2.81 2.86

PI 0.75 0.76 0.78 0.79 0.80

TC 3.22 3.44 3.66 3.88 4.11
SC 2.58 2.63 2.69 2.74 2.79

PI 0.83 0.85

TC 3.06 3.28

0.86

3.50

0.88 0.89

3.72 3.94

SC 2.51 2.57 2.62 2.67 2.73

PI 0.92 0.94

TC 2.89 3.12

0.95

3.34

0.96 0.98

3.56 3.78

SC 2.45 2.50 2.55 2.61 2.66

PI 1.01 1.02 1.04 1.05 1.07

TC 2.70 2.92 3.14 3.36 3.58
SC 2.37 2.42 2.47 2.53 2.58

PI 1.11 1.13 1.14 1.16 1.17

LEGEND

TC – Total Cooling Capacity, kW
SC – Sensible Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (
DB – Dry Bulb Temp., (

o

o

C)

C)

ID – Indoor

5.3.2 Capacity Correction Factors

Cooling Capacity Ratio Vs. Outdoor Temperature

1.2

1.1

1

0.9

0.8

0.7

Capacity Rat ion

0.6

0.5

20 25 30 35 40 45

Outdoor T emperature [deg C]

5-4

Revision Y05-02 Service Manual - K DCI

5.3.3 Heating Capacity (kW) - Run Mode

CONTENTSCONTENTS

ID COIL ENTERING AIR DB TEMPERATURE [ºC]

OD COIL

ENTERING AIR DB/

WB TEMPERATURE

[ºC]

-15/-16

-10/-12

-7/-8

-1/-2

2/1

7/6

10/9

15/12

15-24

(Protection Range)

DATA 15 20 25

TC 2.74 2.55 2.35

PI 0.80 0.88 0.96

TC 3.05 2.86 2.66

PI 0.96 1.04 1.12

TC 3.28 3.09 2.90

PI 1.09 1.17 1.25

TC 3.39 3.20 3.01

PI 1.15 1.23 1.31

TC 3.47 3.28 3.09

PI 1.19

TC 4.49

PI 1.25

TC 4.74

PI 1.32 1.40 1.49

TC 4.99 4.80 4.60

PI 1.40 1.48 1.56

TC 85 - 105 % of nominal

PI 80 - 120 % of nominal

1.27

4.30

1.33

4.55

PERFORMANCE DATA

1.35

4.11

1.41

4.36

LEGEND

TC – Total Cooling Capacity, kW
PI – Power Input, kW

o

WB – Wet Bulb Temp., (
DB – Dry Bulb Temp., (

o

C)

C)
ID – Indoor
OD – Outdoor

5.3.4 Capacity Correction Factors

Heating Capacity Ratio Vs. Outdoor Temperature

1.2

1.1

1

0.9

0.8

0.7

Capacity Rat ion

0.6

0.5

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [de g C]

Revision Y05-02Service Manual - K DCI

5-5

PERFORMANCE DATA

CONTENTSCONTENTS

5.4 Capacity Correction Factor Due to Tubing Length

5.4.1 Cooling

1.01

1.00

0.99

0.98

0.97

0.96

0.95

0.94

Capacity Ratio

0.93

0.92

0.91

3 4 5 6 7 8 9 1011121314151617181920

Tubing Length [m]

5.4.2 Heating

1.02

1.00

0.98

0.96

0.94

Capacity Ratio

0.92

0.90

3 4 5 6 7 8 9 1011121314151617181920

Tubing Length [m]

5-6

Revision Y05-02 Service Manual - K DCI

5.5 K35S DCI

CONTENTSCONTENTS

5.5.1 Cooling Capacity (kW) - Run Mode

PERFORMANCE DATA

OD COIL

ENTERING AIR DB

TEMPERATURE [ºC]

-10 - 20

(protection range)

25

30

35

40

46

ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC]

DATA

22/15 24/17 27/19 29/21 32/23

TC 80 - 110 % of nominal
SC 80 - 105 % of nominal

PI 25 - 50 % of nominal
TC 3.38 3.60 3.83 4.05 4.27
SC 2.65 2.70 2.75 2.81 2.86

PI 0.68 0.70 0.71 0.72 0.74
TC 3.22 3.44 3.66 3.88 4.11
SC 2.58 2.63 2.69 2.74 2.79

PI 0.76 0.78
TC 3.06 3.28

0.79

3.50

0.80 0.82

3.72 3.94

SC 2.51 2.57 2.62 2.67 2.73

PI 0.84 0.86
TC 2.89 3.12

0.87

3.34

0.88 0.90

3.56 3.78

SC 2.45 2.50 2.55 2.61 2.66

PI 0.92 0.94 0.95 0.96 0.98
TC 2.70 2.92 3.14 3.36 3.58
SC 2.37 2.42 2.47 2.53 2.58

PI 1.02 1.03 1.05 1.06 1.07

LEGEND

TC – Total Cooling Capacity, kW
SC – Sensible Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (
DB – Dry Bulb Temp., (

o

o

C)

C)

ID – Indoor
OD – Outdoor

5.5.2 Capacity Correction Factors

Cooling Capacity Ratio Vs. Outdoor Temperature

1.2

1.1

1

0.9

0.8

0.7

Capacity Rat ion

0.6

0.5

20 25 30 35 40 45

Outdoor Te mperature [deg C]

Revision Y05-02Service Manual - K DCI

5-7

PERFORMANCE DATA

CONTENTSCONTENTS

5.5.3 Heating Capacity (kW) - Run Mode

ID COIL ENTERING AIR DB TEMPERATURE [ºC]

OD COIL

ENTERING AIR DB/

WB TEMPERATURE

[ºC]

-15/-16

-10/-12

-7/-8

-1/-2

2/1

7/6

10/9

15/12

15-24

(Protection Range)

DATA 15 20 25

TC 2.86 2.66 2.46

PI 0.71 0.78 0.85

TC 3.19 2.99 2.79

PI 0.85 0.93 1.00

TC 3.43 3.23 3.03

PI 0.96 1.03 1.11

TC 3.55 3.35 3.15

PI 1.02 1.09 1.16

TC 3.63 3.43 3.23

PI 1.05

TC 4.70

PI 1.11

TC 4.96

PI 1.17 1.25 1.32

TC 5.22 5.02 4.82

PI 1.24 1.31 1.38

TC 85 - 105 % of nominal

PI 80 - 120 % of nominal

1.13

4.50

1.18

4.76

1.20

4.30

1.25

4.56

LEGEND

TC – Total Cooling Capacity, kW
PI – Power Input, kW

o

WB – Wet Bulb Temp., (
DB – Dry Bulb Temp., (

o

C)

C)
ID – Indoor
OD – Outdoor

5.5.4 Capacity Correction Factors

Heating Capacity Ratio Vs. Outdoor Temperature

1.2

1.1

1

0.9

0.8

0.7

Capacity Ration

0.6

0.5

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [deg C]

5-8

Revision Y05-02 Service Manual - K DCI

PERFORMANCE DATA

CONTENTSCONTENTS

15.6 Capacity Correction Factor Due to Tubing Length

5.6.1 Cooling

1.01

1.00

0.99

0.98

0.97

0.96

0.95

0.94

Capacity Ratio

0.93

0.92

0.91

3 4 5 6 7 8 9 1011121314151617181920

Tubing Length [m]

5.6.2 Heating

1.02

1.00

0.98

0.96

0.94

Capacity Ratio

0.92

0.90

3 4 5 6 7 8 9 1011121314151617181920

Tubing Length [m]

Revision Y05-02Service Manual - K DCI

5-9

PERFORMANCE DATA

CONTENTSCONTENTS

5.7 K50 DCI

5.7.1 Cooling Capacity (kW) - Run Mode

OD COIL

ENTERING AIR DB

TEMPERATURE [ºC]

-10 - 20

(protection range)

25

30

35

40

46

ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC]

DATA

22/15 24/17 27/19 29/21 32/23

TC 80 - 110 % of nominal
SC 80 - 105 % of nominal

PI 25 - 50 % of nominal
TC 4.85 5.13 5.42 5.70 5.99
SC 3.30 3.35 3.40 3.45 3.50

PI 1.20 1.23 1.26 1.28 1.31
TC 4.60 4.88 5.17 5.45 5.74
SC 3.17 3.22 3.27 3.32 3.37

PI 1.37 1.40
TC 4.35 4.63

1.42

4.92

1.45 1.48

5.20 5.49

SC 3.04 3.09 3.14 3.19 3.24

PI 1.54 1.56
TC 4.10 4.39

1.59

4.67

1.62 1.64

4.96 5.24

SC 2.91 2.96 3.01 3.06 3.11

PI 1.70 1.73 1.76 1.78 1.81
TC 3.80 4.09 4.37 4.66 4.94
SC 2.76 2.81 2.86 2.91 2.95

PI 1.90 1.93 1.96 1.98 2.01

LEGEND

TC – Total Cooling Capacity, kW
SC – Sensible Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (
DB – Dry Bulb Temp., (

o

o

C)

C)

ID – Indoor
OD – Outdoor

5.7.2 Capacity Correction Factors

Cooling Capacity Ratio Vs. Outdoor Temperature

1.2

1.1

1

0.9

0.8

0.7

Capacity Ration

0.6

0.5

20 25 30 35 40 45

Outdoor Temperature [deg C]

5-10

Revision Y05-02 Service Manual - K DCI

5.7.3 Heating Capacity (kW) - Run Mode

CONTENTSCONTENTS

ID COIL ENTERING AIR DB TEMPERATURE [ºC]

OD COIL ENTERING

AIR DB/WB

TEMPERATURE [ºC]

DATA 15 20 25

PERFORMANCE DATA

-15/-16

-10/-12

-7/-8

-1/-2

2/1

7/6

10/9

15/12

15-24

(Protection Range)

LEGEND

TC 2.66 2.28 1.90

PI 1.15 1.23 1.31

TC 3.52 3.13 2.75

PI 1.30 1.38 1.46

TC 4.16 3.77 3.39

PI 1.41 1.49 1.57

TC 4.47 4.09 3.71

PI 1.46 1.55 1.63

TC 4.69 4.30 3.92

PI 1.50

TC 6.24

PI 1.56

TC 6.56

1.58

5.85

1.64

6.18

1.66

5.47

1.72

5.79

PI 1.59 1.67 1.75

TC 6.88 6.50 6.12

PI 1.62 1.70 1.78

TC 85 - 105 % of nominal

PI 80 - 120 % of nominal

TC – Total Cooling Capacity, kW
PI – Power Input, kW

o

WB – Wet Bulb Temp., (
DB – Dry Bulb Temp., (

o

C)

C)
ID – Indoor
OD – Outdoor

5.7.4 Capacity Correction Factors

Heating Capacity Ratio Vs. Outdoor Temperature

1.2

1.1

1

0.9

0.8

0.7

0.6

Capacity Rat ion

0.5

0.4

-15 -10 -5 0 5 10 15

Outdoor WB Te mperature [deg C]

Revision Y05-02Service Manual - K DCI

5-11

PERFORMANCE DATA

CONTENTSCONTENTS

5.8 Capacity Correction Factor Due to Tubing Length

5.8.1 Cooling

1.001

1.000

0.999

0.998

0.997

0.996

0.995

Capacity Ratio

0.994

0.993

0 5 10 15 20 25 30 35

Tubing Length[m]

5.8.2 Heating

1.02

1.00

0.98

0.96

0.94

0.92

0.90

Capacity Ratio

0.88

0.86

0 5 10 15 20 25 30 35

Tubing Length[m]

5-12

Revision Y05-02 Service Manual - K DCI

6. PRESSURE CURVES

CONTENTSCONTENTS

6.1 Model: K 25 DCI

6.1.1 Cooling – Test Mode

Suction Pressure Vs.Outdoor Temp' - Cooling

1400

1300

1200

1100

1000

900

800

700

600

Suction Pressure [kPa]

500

10 15 20 25 30 35 40 45

PRESSURE CURVES

Indoor DB/WB

Temp.

22/15

24/17

27/19

29/21

32/23

Discharge Pressure [kPa]

Outdoor DB Temperature [ºC]

Discharge Pressure Vs.Outdoor Temp'- Cooling

4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500
1250
1000

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

Indoor

DB/W B

22/15

24/17

27/19

29/21

32/23

Revision Y05-02Service Manual - K DCI

6-1

PRESSURE CURVES

CONTENTSCONTENTS

6.1.2 Heading – Test Mode

Suction Pressure Vs. Outdoor Temp' - Heating

1300
1200
1100
1000

900
800
700
600
500
400

Suction Pressure [kPa]

300
200

-15 -10 -5 0 5 10 15

Outdoor WB Temperature[ºC]

Indoor DB

15

20

25

Discharge Pressure [kPa]

Discharge Pressure Vs.Outdoor Temp'- Heating

4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500
1250
1000

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [ºC]

Indoor DB

15

20

25

6-2

Revision Y05-02 Service Manual - K DCI

6.2 Model: K 35 DCI

CONTENTSCONTENTS

6.2.1 Cooling – Test Mode

Suction Pressure Vs.Outdoor Temp' - Cooling

PRESSURE CURVES

Suction Pressure [kPa]

Discharge Pressure [kPa]

1400

1300

1200

1100

1000

900

800

700

600

500

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

Discharge Pressure Vs.Outdoor Temp'- Cooling

4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500
1250
1000

10 15 20 25 30 35 40 45

Indoor

DB/W B

22/15

24/17

27/19

29/21

32/23

Indoor

DB/WB

22/15

24/17

27/19

29/21

32/23

Outdoor DB Temperature [ºC]

Revision Y05-02Service Manual - K DCI

6-3

PRESSURE CURVES

CONTENTSCONTENTS

6.2.2 Heating – Test Mode

Suction Pressure Vs.Outdoor Temp' - Cooling

Suction Pressure [kPa]

Discharge Pressure [kPa]

1400

1300

1200

1100

1000

900

800

700

600

500

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

Discharge Pressure Vs.Outdoor Temp'- Cooling

4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500
1250
1000

10 15 20 25 30 35 40 45

Indoor

DB/W B

22/15

24/17

27/19

29/21

32/23

Indoor

DB/WB

22/15

24/17

27/19

29/21

32/23

6-4

Outdoor DB Temperature [ºC]

Revision Y05-02 Service Manual - K DCI

6.3 Model: K 35S DCI

CONTENTSCONTENTS

6.3.1 Cooling – Test Mode

Suction Pressure Vs.Outdoor Temp' - Cooling

1400

1300

1200

1100

1000

900

800

700

600

Suction Pressure [kPa]

500

10 15 20 25 30 35 40 45

PRESSURE CURVES

Indoor

DB/WB

22/15

24/17

27/19

29/21

32/23

Discharge Pressure [kPa]

Outdoor DB Temperature[ºC]

Discharge Pressure Vs.Outdoor Temp' - Cooling

4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500
1250
1000

10 15 20 25 30 35 40 45

Outdoor DB Temperature[ºC]

Indoor

DB/WB

22/15

24/17

27/19

29/21

32/23

Revision Y05-02Service Manual - K DCI

6-5

PRESSURE CURVES

CONTENTSCONTENTS

6.3.2 Heating – Test Mode

Suction Pressure Vs.Outdoor Temp' - Heating

1300
1200
1100
1000

900
800
700
600
500
400

Suction Pressure [kPa]

300
200

-15 -10 -5 0 5 10 15

Indoor DB

15

20

25

Discharge Pressure [kPa]

Outdoor WB Temperature[ºC]

Discharge Pressure Vs.Outdoor Temp' - Heating

4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500
1250
1000

-15 -10 -5 0 5 10 15

Outdoor WB Temperature[ºC]

Indoor DB

15

20

25

6-6

Revision Y05-02 Service Manual - K DCI

6.4 Model: K 50 DCI

CONTENTSCONTENTS

6.4.1 Cooling – Test Mode

Suction Pressure Vs.Outdoor Temp' - Cooling

1400

1300

1200

1100

1000

900

800

700

600

Suction Pressure [kPa]

500

10 15 20 25 30 35 40 45

PRESSURE CURVES

Indoor

DB/WB

22/15

24/17

27/19

29/21

32/23

Discharge Pressure [kPa]

Outdoor DB Temperature[ºC]

Discharge Pressure Vs.Outdoor Temp' - Cooling

4250
4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500
1250
1000

10 15 20 25 30 35 40 45

Outdoor DB Temperature[ºC]

Indoor

DB/WB

22/15

24/17

27/19

29/21

32/23

Revision Y05-02Service Manual - K DCI

6-7

PRESSURE CURVES

CONTENTSCONTENTS

6.4.2 Cooling – Test Mode

Suction Pressure Vs.Outdoor Temp' - Heating

1100

1000

900

800

700

600

500

400

Suction Pressure [kPa]

300

200

-15 -10 -5 0 5 10 15

Outdoor WB Temperature[ºC]

Indoor DB

15

20

25

Discharge Pressure [kPa]

Discharge Pressure Vs.Outdoor Temp' - Heating

4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500
1250
1000

-15 -10 -5 0 5 10 15

Outdoor WB Temperature[ºC]

Indoor DB

15

20

25

6-8

Revision Y05-02 Service Manual - K DCI

ELECTRICAL DATA

CONTENTSCONTENTS

7. ELECTRICAL DATA

7.1 Single Phase Units

Model K 25 DCI K 35/35S DCI K 50 DCI
Power Supply 1 PH, 220-240 VAC, 50Hz

Connected to Indoor
Maximum Current 10 A 12 A

Inrush Current
Starting Current

Circuit breaker 16 A 20 A

(a)

(b)

35 A

10 A 10.5 A

Power supply wiring no. x cross section 3 X 1.5 mm

Interconnecting cable no. x cross section 4 X 1.5 mm

(a) Inrush current is the current when power is up (charging the DC capacitors

at outdoor unit controller).

(b) Starting current is the current when starting the compressor.

NOTE

Power wiring cord should comply with local lows and electrical
regulations requirements

2

2

3 X 2.5 mm

4 X 2.5 mm

2

2

Revision Y05-02Service Manual - K DCI

7-1

8. WIRING DIAGRAMS

CONTENTSCONTENTS

8.1 K25, 35, 35S, 50 DCI

WIRING DIAGRAMS

Revision Y05-02Service Manual - K DCI

8-1

9. REFRIGERATION DIAGRAMS

CONTENTSCONTENTS

9.1 K 25, 35,35S, 50 DCI

REFRIGERATION DIAGRAMS

Revision Y05-02Service Manual - K DCI

9-1

10. TUBING CONNECTIONS

CONTENTSCONTENTS

TUBING CONNECTIONS

TUBE (Inch)

¼” ⅜” ½” ⅝” ¾”

TORQUE (Nm)

Flare Nuts 11-13 40-45 60-65 70-75 80-85
Valve Cap 13-20 13-20 18-25 18-25 40-50

Service Port Cap 11-13 11-13 11-13 11-13 11-13

1. Valve Protection Cap-end

2. Refrigerant Valve Port (use Allen wrench to open/close)

3. Valve Protection Cap

4. Refrigerant Valve

5. Service Port Cap

6. Flare Nut

7. Unit Back Side

8. Copper Tube

When the outdoor unit is installed above the indoor unit an oil trap is required every 5m along the suction
line at the lowest point of the riser. Incase the indoor unit is installed above the outdoor, no trap is
required.

Revision Y05-02Service Manual - K DCI

10-1

CONTROL SYSTEM

CONTENTSCONTENTS

11. CONTROL SYSTEM

11.1 General Functions and Operating Rules

The DCI software is fully parametric.
All the model dependent parameters are shown in Blue color and with Italic style [parameter].
The parameters values are given in the last section of this control logic chapter of the service
manual.

11.1.1 System Operation Concept

The control function is divided between indoor and outdoor unit controllers. Indoor unit is the
System ‘Master’, requesting the outdoor unit for cooling/heating capacity supply. The outdoor unit is
the system nless it enters into a protection mode'Slave’ and it must supply the required capacity
avoiding it from supplying the requested capacity.
The capacity request is transferred via indoor to outdoor communication, and is represented by a
parameter called ‘NLOAD’. NLOAD is an integer number with values between 0 and 127, and it
represents the heat or cool load felt by the indoor unit.

11.1.2 Compressor Frequency Control

11.1.2.1 NLOAD setting

The NLOAD setting is done by the indoor unit controller, based on a PI control scheme.
The actual NLOAD to be sent to the outdoor unit controller is based on the preliminary LOAD
calculation, the indoor fan speed, and the power shedding function.

NLOAD limits as a function of indoor fan speed:
Indoor Fan Speed Maximum NLOAD Cooling Maximum NLOAD Heating
Low
Medium
High
Turbo
Auto

NLOAD limits as a function of power shedding:
Mode Power Shedding OFF Power Shedding ON
Cool No limit Nominal Cooling
Heat No limit Nominal Heating

Max NLOADIF1C
Max NLOADIF2C
Max NLOADIF3C
Max NLOADIF4C
Max NLOADIF5C

127
127
127
127
127

11.1.3 Target Frequency Setting

The compressor target frequency is a function of the NLOAD number sent from the indoor
controller and the outdoor air temperature.
Basic Target Frequency Setting:

NLOAD Target Frequency
127
10 < NLOAD < 127 Interpolated value between minimum and maximum frequency
10
0 Compressor is stopped

Maximum frequency

Minimum frequency

Revision Y05-02Service Manual - K DCI

11-1

CONTROL SYSTEM

CONTENTSCONTENTS

Target frequency limits as a function of outdoor air temperature )OAT(:
OAT Range Cool mode limits Heat mode limits
OAT No limit<6
6≤OAT<15
15 ≤ OAT < 24
24 ≤ OAT No limit

MaxFreqAsOATC

MaxFreqAsOAT1H

MaxFreqAsOAT2H

11.1.4 Frequency Changes Control

Frequency change rate is 1 Hz/sec.

11.1.5 Compressor Starting Control

Frequency

Step 3

Step 2

Step 1

1

Minute

1

Minute

Time

Min 10 Minutes

11.1.6 Minimum On and Off Time

3 minutes.

11.1.7 Indoor Fan Control

10 Indoor fan speeds are determined for each model. 5 speeds for cool/dry/fan modes and 5
speeds for heat mode.
When user sets the indoor fan speed to a fixed speed )Low/ Medium/ High(, unit will operate
constantly at set speed.
When Auto Fan is selected, indoor unit controller can operate in all speeds. The actual speed is set
according to the cool/heat load.

11.1.7.1 Turbo Speed

11-2

The Turbo speed is activated during the first 30 minutes of unit operation when auto fan speed is
selected and under the following conditions:
Difference between set point and actual room temperature is bigger then 3 degrees.
Room temperature 22 for cooling, or 25 for heating.><

Revision Y05-02 Service Manual - K DCI

CONTROL SYSTEM

CONTENTSCONTENTS

11.1.8 Heating Element Control

Heating element can be started if LOAD 0.8 mumNLOAD AND Indoor Coil temperature> * Maxi
<45.
The heating element will be stopped when LOAD 0.5 MaximumNLOAD OR if Indoor Coil<*
Temperature 50.>

11.1.9 Outdoor Fan Control

7 outdoor fan speeds are determined for each model. 3 speeds for cool and dry modes, and 3
speeds for heat mode, and a very low speed.
Outdoor fan speed is a function of compressor frequency and outdoor air temperature (OAT).
4 routines for fan control are determined. The control routine selection depends on operation
mode, compressor speed, outdoor air temperature (OAT) and heat sink temperature (HST).

Routine Conditions
A Heating with OAT 15<0C

or
Cooling with OAT > 20
or

Faulty OAT
B Cooling with 20
C Cooling with 7

0

C>OAT>500C

0

C>OAT

D Heating with OAT 15>

0

C, or HST 50>0C

0

C

Outdoor Fan Speed
Compressor Frequency (CF) Routine A Routine B Routine C Routine D
CF 0 OFF OFF OFF OFF=
10 ≤ CF < OFLowFreq Low Low Very Low Low
10 ≤ CF < OFMedFreq Medium Low Very Low Low

OFMedFreq ≤ CF High Low Low Medium

When compressor is switched to OFF and the heat sink temperature is above 55 degrees, the
outdoor fan will remain ON in low speed for up to 3 minutes.

11.1.10 EEV (electronic Expansion valve) Control

EEV opening is defined as EEV = EEVOL+ EEV
EEVOLis the initial EEV opening as a function of the compressor frequency, operation mode, unit
model and capacity.
EEV

is a correction value for the EEV opening that is based on the compressor temperature.

CV

During the first 10 minutes of compressor operation EEV
Once the first 10 minutes are over, the correction value is calculated as follow: EEV
EEV
EEV

(N-1) + EEV

CV

is the correction based on the compressor temperature. A target compressor temperature

CTT

CTT

is set depending on frequency and outdoor air temperature, and the actual compressor
temperature is compared to the target temperature to set the required correction to the EEV
opening.

CV

CV

0.=
(n) =

CV

11.1.11 Reversing Valve (RV) Control

Reversing valve is on in heat mode.
Switching of RV state is done only after compressor is off for over 3 minutes.

11.1.12 Ioniser Control

Ioniser is on when unit is on AND indoor fan is on AND Ioniser power switch (on Ioniser) is on.

Revision Y05-02Service Manual - K DCI

11-3

CONTROL SYSTEM

CONTENTSCONTENTS

11.1.13 Electro Static Filter )ESF( Control

ESF is on when ESF switch is on, Safety switch is pressed, unit is on, AND indoor fan is on.

11.1.14 Base Heater Control

0

When OAT is connected, Base Heater will be on when unit is in heating and OAT<2
When OAT is disconnected, Base Heater will be on when unit is in heating.

C.

11.2 Fan Mode

In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be ad ng to the differencejusti automatically according
between actual room temperature and user set point temperature.

11.3 Cool Mode

NLOAD is calculated according to the difference between actual room temperature and user set
point temperature by PI control.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be ad8usted automatically according to the calculated
NLOAD.

11.4 Heat Mode

NLOAD is calculated according to the difference between actual room temperature and user set
point temperature by PI control.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adng to the calculated
NLOAD.

11.4.1 Temperature Compensation

In wall mounted, ducted, and cassette models, 3 degrees are reduced from room temperature
reading (except when in I-Feel mode), to compensate for temperature difference between high and
low areas in the heated room, and for coil heat radiation on room thermistor.
The temperature compensation can be enabled/disabled by shortening of J2 on the indoor unit
controller.

Model J2 Shorted J2 Opened
Wall mounted Compensation

Disabled
Cassette Compensation Enabled Compensation Disabled
Ducted Compensation Enabled Compensation Disabled
Floor/Ceiling Compensation

Disabled

Compensation Enabled

Compensation Enabled

11-4

Revision Y05-02 Service Manual - K DCI

11.4.2 Indoor Fan Control in Heat Mode

CONTENTSCONTENTS

Indoor fan speed depends on the indoor coil temperature:

CONTROL SYSTEM

ICTST

ICTVL ICTTICTHICTL

11.5 Auto Cool/Heat Mode

When in auto cool heat mode unit will automatically select between cool and heat mode according
to the difference between actual room temperature and user set point temperature )∆T(.
Unit will switch from cool to heat when compressor is off for 3 minutes, and ∆T < -3.
Unit will switch from heat to cool when compressor is off for 5 minutes, and ∆T < -3.

11.6 Dry Mode

As long as room temperature is higher then the set point, indoor fan will work in low speed and
compressor will work between 0 and MaxNLOADIF1C Hz.
When the room temperature is lower than the set point, compressor will be switched OFF and
indoor fan will cycle 3 minutes OFF, 1 minute ON.

11.7 Protections

There are 5 protection codes.
Normal (Norm) – unit operate normally.
Stop Rise (SR) – compressor frequency can not be raised but does not have to be decreased.
HzDown1 (D1) – Compressor frequency is reduced by 2 to 5 Hz per minute.
HzDown2 (D2) – Compressor frequency is reduced by 5 to 10 Hz per minute.
Stop Compressor (SC) – Compressor is stopped.

11.7.1 Indoor Coil Defrost Protection

ICT TrendICT
Fast
Increasing

ICT<-2SC SCSC SCSC

-2 ≤ ICT < 0 D1 D1 D2 D2 D2
0 ≤ ICT < 2 SR SR D1 D2 D2
2 ≤ ICT < 4 SR SR SR D1 D2
4 ≤ ICT < 6 Norm Norm SR SR D1
6 ≤ ICT < 8 Norm Norm Norm SR SR
8 ≤ ICT Normal

Increasing No change Decreasing Fast

Decreasing

Revision Y05-02Service Manual - K DCI

11-5

CONTROL SYSTEM

CONTENTSCONTENTS

11.7.2 Indoor Coil over Heating Protection

ICT TrendICT
Fast
Decreasing

Decreasing No Change Increasing Fast

Increasing
ICT55SCSCSCSCSC>
53 <ICT ≤ 55 D1 D1 D2 D2 D2
49 < ICT ≤ 53 SR SR D1 D2 D2
47<ICT≤49SRSRSRD1 D2
45 < ICT ≤ 47 Norm Norm SR SR D1
43 < ICT ≤ 45 Norm Norm Norm SR SR
ICT ≤ 43 Normal

11.7.3 Compressor over Heating Protection

Compressor temperature can be in one of 5 control zones )4 in protection, and 1 normal(,
according to the following chart.

CTT

Stop-Compresor

CTTOH4

CTTOH3

CTTOH2

CTTOH1

Control Status Compressor Temperature

P3

P2

P1

Normal

Else

Increases
P1 Norm SR
P2 D1 SR
P3 D2 D1
Stop Compressor SC

11.7.4 Compressor over Current Protection

CCR

Stop-Compresor

CCROC4

CCROC3

HzDown1

CCROC2

CCROC1

Normal

HzDown2

Stop-Rise

11-6

Revision Y05-02 Service Manual - K DCI

CONTROL SYSTEM

CONTENTSCONTENTS

11.7.5 Heat Sink Over Heating Protection (NA for DCI 25 and 35)

HST TrendHST

Decreasing No Change Increasing
HST SC SC SC>90
85<HST≤90D1D2D2
82 < HST ≤ 85 SR D1 D2
80 < HST ≤ 82 SR SR D1
78 < HST ≤ 80 Norm Norm SR
HST ≤ 78 Normal

11.7.6 Outdoor Coil Deicing Protection

11.7.6.1 Deicing Starting Conditions

Deicing operation will start when either one of the following conditions exist:
Case 1: OCT OAT – 8 AND TLD<>DI
Case 2: OCT OAT – 12 AND TLD 30 minutes.<>
Case 3: OCT is Invalid AND TLD DI>
Case 4: Unit is ust switched to STBY AND OCTj<OAT-8
Case 5: NLOAD 0 AND OCT OAT -8=<

OCT – Outdoor Coil Temperature
OAT – Outdoor Air Temperature
TLD – Time from Last Deicing
DI – Deicing Interval (Time Interval Between Two Deicing)

Deicing interval time when compressor is first started in heat mode, is 10 minutes if OCT < -2, and
is 40 minutes in other cases.
Deicing interval time is changed (increased/ decreased in 10 minutes steps) as a function of
deicing time. If deicing time is shorter then former deicing time, the deicing interval time will be
increased. If deicing time is longer then former deicing time, the deicing interval time will be
decreased.

Revision Y05-02Service Manual - K DCI

11-7

CONTROL SYSTEM

CONTENTSCONTENTS

11.7.6.2 Deicing Protection Procedure

OCT

12

0

Threshold

COMP

RV

OFAN

EEV

ON

HEAT

COOL

ON

OFF

Any

T1 T2

max. 12 minutes

DT

T3 T3

EEVDeicerOpen

36 seconds, T3 nds= 6 seco

11.8 Condensate Water Over Flow Protection

T1

T1 = T2 =

11-8

Each of the pins P1, P2, P3 can have two options:
1 – When it is shorted with P4
0 – When it is not shorted to P4

11.8.1 3 Levels Logic (used in floor/ceiling models)

P2 P3 Level

00 L0
1 0 L1
11 L23&
01 L4

Revision Y05-02 Service Manual - K DCI

Water Level

CONTENTSCONTENTS

LEVEL4

LEVEL 3

LEVEL1

Pump

NLOAD

CONTROL SYSTEM

ON

OFF

ANY

0

OPER LED

BLINK

NORMAL

11.8.2 1 Level Logic (used in all models except for floor/ceiling

models)

P2 P3 Level

Water Level

OPER

LED

Don`t
care
Don`t
care

Overflow

Normal

ON

OFF

BLINK

1 Normal

0 Overflow

Overflow when

unit is ON

Overflow when

unit is OFF

NLOAD

PUMP

ANY

0

ON

OFF

8min 8min

NLOAD is

forced to 0

8min

11.9 Indoor Unit Dry Contact

Indoor unit Dry contact has two alternative functions that are selected by J8.

Function Contact = Open Contact = Short
J8 Presence Detector Connection No Limit Forced to STBY= Open
J8 Power Shedding Function No Limit Limit NLOAD= Open

Revision Y05-02Service Manual - K DCI

11-9

CONTROL SYSTEM

CONTENTSCONTENTS

11.10 Operating the Unit from the Mode Button

Forced operation allows to start, stop and operate in Cooling or Heating, in pre-set temperature
according to the following table:

Forced operation Mode Pre-set Temperature
Cooling 200C
Heating 28

0

C

11.11 On Unit Controls and Indicators

11.11.1 Indoor Unit Controller Controls and Indicators For All Models

Except for Floor/Ceiling model

STAND BY

INDICATOR

OPERATION INDICATOR

TIMER INDICATOR Lights up during Timer and Sleep operation.

FILTER INDICATOR Lights up when Air Filter needs to be cleaned.

COOLING INDICATOR

HEATING INDICATOR

Mode SWITCH

(COOL/HEAT/OFF)

RESET / FILTER

SWITCH

Lights up when the Air Conditioner is connected to power and ready to
receive the R/C commands
Lights up during operation.
Blinks for 300 msec., to announce that a R/C infrared signal has
been received and stored.
Blinks continuously during protections (according to the relevant spec
section).

Lights up when system is switched to Cool Mode by using the Mode
Switch on the unit
Lights up when system is switched Heat Mode by using the Mode
Switch on the unit
Every short pressing , the next operation mode is selected, in this order
: SB → Cool Mode → Heat Mode → SB →
In long pressing system enters diagnostic mode.
For short pressing:
When Filter LED is on - turn off the FILTER INDICATOR after a clean
filter has been reinstalled.
When Filter LED is off able/disable the buzzer announcer, if
selected.

.

.

11-10

Revision Y05-02 Service Manual - K DCI

11.11.2 Indoor Unit Controls and Indicators for LCD Display

CONTENTSCONTENTS

STBY Cool Heat Auto Fan Dry
OFF SPT(1*)

SPT(1*)

SPT(1*)SPT(1*) SPT(1*) SPT(1*)

CONTROL SYSTEM

OFF(2*)

OFF(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*)

(Low)

(Med)

(High)

(Turbo)

(Auto)
Backlight(red) OFF OFF ON(3*) ON(3*)
Backlight(green) OFF ON(3*) OFF

OFF

OFF

OFF

OFF

OFF

User
setting
IFAN
speed

ON(2*)ON(2*) ON(2*) ON(2*) ON(2*)

User
setting
IFAN
speed

User
setting
IFAN
speed

ON(3*)

User
setting
IFAN
speed

ON(3*)
ON(3*) ON(3*)

User
setting
IFAN
speed

OFF

Revision Y05-02Service Manual - K DCI

11-11

CONTROL SYSTEM

CONTENTSCONTENTS

11.11.3 Indoor Unit Controller Controls and Indicators for Floor/Ceiling

Model

STANDBY
INDICATOR

OPERATE
INDICATOR

(4)

TIMER
INDICATOR
FILTER
INDICATOR
COOLING
INDICATOR
HEATING
INDICATOR
FAN MODE
INDICATOR

(4)

FAN SPEED
INDICATORS

TEMP.
SETTING
INDICATORS
FAN SPEED
BUTTON

TEMP.
SETTING UP
BUTTON
TEMP.
SETTING
DOWN BUTTON

MODE
BUTTON

POWER
BUTTON
RESET /
FILTER
BUTTON

Lights up when the Air Conditioner is connected to power and is ready
for operation

1. Lights up during operation.

2. Blinks for 300 msec., to announce that a R/C infrared signal
has been received and stored.

3. Blinks continuously during protections (according to the relevant spec
section).

Lights up during Timer and Sleep operation.

1. Lights up when Air Filter needs to be cleaned.

2. Blinks during Water Over Flow in PXD models. (Cf. Sect. 7.3)
Lights up when system is switched to Cool Mode by using the Mode
Switch on the unit.
Lights up when system is switched Heat Mode by using the Mode
Switch on the unit

.

Lights up in Fan Mode activated by local switches.

L -- Lights up when IFAN setting is Low.
M -- Lights up when IFAN setting is Medium.
H -- Lights up when IFAN setting is High.
A -- Lights up when IFAN setting is Auto.
Each one of the seven indicators indicates the following SPT: 18, 20,
22, 24, 26, 28, 30 ]

o

c[. The odd number temperatures are indicated by
turning on the two adcent indicators.
Press this button to change the speed of the IFAN. Each pressing
change the speed in the sequence of:

..... L → M → H → Auto → L → ...

Pressing this button increases the SPT by 1
Note: The Max SPT is 30

Pressing this button decreases the SPT by 1
Note: The Min SPT is 18

o

C.

o

C.

o

C.

o

C.

Every short pressing , the next operation mode is selected, in this order
: SB → Cool Mode → Heat Mode → SB →
In long pressing system enters diagnostic mode.
Toggle the unit between OPER & STBY modes.

For short pressing:
When Filter LED is on - turn off the FILTER INDICATOR after a clean
filter has been reinstalled.
When Filter LED is off able/disable the buzzer announcer, if
selected.
In long pressing system enters set up mode (if in SB).

11-12

11.11.4 Outdoor Unit Controller Indicators

Unit has three LED
SB LED is ON when power is ON (230 VAC, even when no communication).
STATUS LED is ON when COMP is ON, and Blinks according to diagnostics mode definitions
when either fault or protection occurs.
FAULT LED Blinks according to diagnostics mode definitions when either fault or protection
occurs.

Revision Y05-02 Service Manual - K DCI

11.12 Jumper Setting

CONTENTSCONTENTS

11.1 . Indoor Unit Controller21

0 = Open Jumper (connect jumper).
1 = Close Jumper (connect jumper).

Jumper –Self test J1

J1OPERATION
SELF-TEST 1
NORMAL

Compensation Jumper – J2

Model J2 (Default) Compensation
Wall Mounted 0 Activated

Floor/Ceiling 1 Deactivated
Ducted/cassette 1 Activated

Family selection Jumper – J3, J4 and J5

0

CONTROL SYSTEM

Family J5 J4 J 3
Reserved

Reserved
Reserved
Wall Mounted (WNG/FLO)
Floor/Ceiling (PXD)
Reserved
Ducted (LS)
Cassette (K)

Model selection Jumper – J6, J7

Model J7 J6
9000 Btu/hr

12000 Btu/hr
18000 Btu/hr
24000 Btu/hr

J8 - Clock/Power Shedding

OPERATION
Clock 0

Power Shedding 1

00
01
10
11

J8

0
0
0
0
1
1
1
1

00
01
10
11
00
01
10
11

J9 – IFAN Cycling Disabling

Display Mode
(wall mounted units only)
LCD 0
LED 1

J9

Revision Y05-02Service Manual - K DCI

11-13

CONTROL SYSTEM

CONTENTSCONTENTS

11.12.2 Outdoor Unit Controller

JP9 JUMPER LAYOUT

Reserved (PIN9)ODU3 (PIN 7) ODU2 (PIN 5) ODU1 (PIN 3) ODU0 (PIN 1)

GND (PIN 10) GND (PIN 8) GND (PIN 6) GND (PIN 4) GND (PIN 2)

ODU MODEL SELECTION

ODU3 ODU2 ODU1 ODU0 ODU Model

OFF OFF OFF OFF Reserved
OFF OFF OFF ON (PIN1 & PIN2) A (DCI 25)
OFF OFF ON (PIN3 & PIN4) OFF B (DCI 35)
OFF OFF ON (PIN3 & PIN4) ON (PIN1 & PIN2) C (DCI 50)
OFF ON (PIN5 & PIN6) OFF OFF D
OFF ON (PIN5 & PIN6) OFF ON (PIN1 & PIN2) E (Duo)
OFF ON (PIN5 & PIN6) ON (PIN3 & PIN4) OFF F

OFF ON (PIN5 & PIN6) ON (PIN3 & PIN4) ON (PIN1 & PIN2) G
ON (PIN7 & PIN8) OFF OFF OFF H
ON (PIN7 & PIN8) OFF OFF ON (PIN1 & PIN2) I
ON (PIN7 & PIN8) OFF ON (PIN3 & PIN4) OFF J
ON (PIN7 & PIN8) OFF ON (PIN3 & PIN4) ON (PIN1 & PIN2) K
ON (PIN7 & PIN8) ON (PIN5 & PIN6) OFF OFF L
ON (PIN7 & PIN8) ON (PIN5 & PIN6) OFF ON (PIN1 & PIN2) M
ON (PIN7 & PIN8) ON (PIN5 & PIN6) ON (PIN3 & PIN4) OFF N
ON (PIN7 & PIN8) ON (PIN5 & PIN6) ON (PIN3 ? PIN4) ON (PIN1 & PIN2) O

11.13 Test Mode

11.13.1 Entering Test Mode

System can enter Test mode in two ways:
Automatically when the following conditions exists for 30 minutes continuously:
Mode l, Set point 16, Room temper= Coo = ature = 27±1, Outdoor temperature = 35±1
Or
Mode = Heat, Set point = 30, Room temperature = 20±1, Outdoor temperature = 7±1
Manually when entering diagnostics with the following settings:
Mode = Cool, Set point = 16
Mode = Heat, Set point = 30

11-14

Revision Y05-02 Service Manual - K DCI

CONTROL SYSTEM

CONTENTSCONTENTS

11.13.2 Unit Operation in Test Mode

In test mode, the unit will operate in fixed settings according to the indoor fan speed setting:

Indoor Fan Speed Setting Unit Setting
Low Minimum Capacity Setting
High Nominal Capacity Setting
Auto Maximum Capacity Setting
During test mode, protections are disabled, except for stop compressor status.

11.14 SW Parameters

11.14.1 Indoor Units SW Parameters

General Parameters for All Models:

Parameters defining the indoor fan speed as a function of Indoor Coil temperature in
heat mode (ICT):

ICTST Speed ICT to stop indoor fan 25
ICTVLSpeed ICT to go down to very low speed 28
ICTLSpeed ICT to start in very low speed 30
ICTHSpeed ICT to start in increase speed from very low 32
ICTTSpeed ICT to enable Turbo fan speed 40

Model Depended Parameters:

Parameter name

NLOAD limits as a function of selected indoor fan speed

MaxNLOADIF1C 40 40
MaxNLOADIF2C 53 53
MaxNLOADIF3C 120 120
MaxNLOADIF4C 127 127
MaxNLOADIF5C 127 127

IFVLOWC 700 700
IFLOWC 800 800
IFMEDC 900 950
IFHIGHC 1050 1100
IFTURBOC 1150 1200
IFVLOWH 700 700
IFLOWH 800 850
IFMEDH 950 1000
IFHIGHH 1100 1150
IFTURBOH 1200 1250

Nominal Compressor Frequency

NomLoadC 40 62
NomLoadH 55 67

Parameter Name

NLOAD limits as a function of selected indoor fan speed

MaxNLOADIF1C 40 40 40 40
MaxNLOADIF2C 53 56 56 60
MaxNLOADIF3C 120 90 90 90
MaxNLOADIF4C 127 90 90 90
MaxNLOADIF5C 127 90 90 90

Nominal Compressor Frequency

NomLoadC 40 60 56 63

DCI 25 DCI 35

Indoor Fan speeds

K 25 K 35 K 35S K 50

Wall Mounted Models

Cassette Models

NomLoadH 55 69 73 80

Revision Y05-02Service Manual - K DCI

11-15

CONTROL SYSTEM

CONTENTSCONTENTS

11.14.2 Outdoor Units SW Parameters

Parameter Name DCI25 DCI35 DCI 50 DCI50 DUO

Compressor Parameters

MinFreqC 30 33 20 20

MaxFreqC 64 80 85 97

MinFreqH 30 35 20 26

MaxFreqH 81 93 99 106

Step1Freq 60 60 60 60

Step2Freq 70 70 70 80

Step3Freq 90 90 90 90

Frequency limits as a function of outdoor air temperature

MaxFreqAsOATC 50 50 64 62

MaxFreqAsOAT1H 65 75 85 85

MaxFreqAsOAT2H 60 60 60 60

Compressor Over Heating Protection

CTTOH1 94 94 94 90

CTTOH2 98 98 98 95

CTTOH3 102 102 102 102

CTTOH4 105 105 105 105

Compressor Over Current Protection [A]

CCR01 7.1 7.1 10 10

CCR02 7.5 7.5 10.5 10.5

CCR03 7.9 7.9 10.8 10.8

CCR04 8.3 8.3 11.2 11.2

Outdoor Fan Speed (RPM)

VL 200 200 200 200

OFLOWC 550 550 600 600

OFMEDC 700 700 760 830

OFMAXC 830 830 920 920

OFLOWH 550 550 600 600

OFMEDH 700 700 830 920

OFMAXH 830 830 1000 1000

Outdoor Fan Limit Control

OFLowFreq 45 45 40 40

OFMedFreq 57 57 70 70

11-16

Revision Y05-02 Service Manual - K DCI

TROUBLESHOOTING

CONTENTSCONTENTS

12. TROUBLESHOOTING

Warning

When Power Up – the whole outdoor unit controller, including the wiring, is under HIGH

VOLTAGE

Never open the Outdoor unit before turning off the PowerHIG

When turned off, the system is still charged (400V)yle

It takes about 4 Min. to discharge the system.

Touching the controller before discharging may cause an electrical shock

For safe handling of the controller please refer to section 12.6 below.

12.1 Single Split system failures and corrective actions

No SYMPTOM PROBABLE

CAUSE

1 Power supply indicator

(Red LED) does not light
up.

2 Unit does not respond to

remote control message

3 Unit responds to remote

control message but
Operate indicator (Green
LED) does not light up

(louvers are opened and
Green LED does light
up)

5 Indoor fan works when

unit is OFF, and indoor
fan speed is not
changed by remote
control command.

6 Compressor does not

start

7 Compressor stops

during operation and
Green LED remains on

No power supply Check power supply. If power supply

Remote control
message not
reached the indoor
unit

Problem with
display PCB

Unit in heat mode
and coil is still not
warm.
Problem with PCB
or capacitor

PCB problem Replace controller

Electronics control
problem or
protection
Electronic control
or power supply
problem

CORRECTIVE ACTION

is OK, check display and display
wiring. if OK, replace controller.
Check remote control batteries, if
batteries are OK, check display and
display wiring, if OK, replace display
PCB.
If still not OK replace controller.
Replace display PCB.
If still not OK replace controller.

Change to cool mode and check.4 Indoor fan does not start

Change to high speed and Check
power supply to motor is higher than
130VAC (for triack controlled motor)
or higher than 220VAC for fixed
speed motors, if OK replace
capacitor, if not OK replace
controller

Perform diagnostics (See 12.3
below), and follow the actions
described.
Perform diagnostics (See 12.3
below), and follow the actions
described.

Revision Y05-02Service Manual - K DCI

12-1

TROUBLESHOOTING

CONTENTSCONTENTS

No SYMPTOM PROBABLE

CAUSE

8 Compressor is on but

outdoor fan does not
work

9 Unit works in wrong

mode )cool instead of
heat or heat instead of
cool(

10 All components are

operating properly but
no cooling or no heating

11 Compressor is over

heated and unit does not
generate capacity

12 Units goes into

protections and
compressor is stopped
with no clear reason

13 Compressor motor is

generating noise and no
suction occurs

14 Water leakage from

indoor unit

15 Freezing of outdoor unit

in heat mode and
outdoor unit base is
blocked with ice

16 Unit operates with wrong

fan speeds or wrong
frequency

Problem with
outdoor electronics
or outdoor fan
Electronics or
power connection
to RV

Refrigerant leak Check refrigeration system.

EEV problem Check EEV

Control problem or
refrigeration
system problem

Phase order to
compressor is
wrong
Indoor unit
drainage tube is
blocked

Wrong umperj

settings

CORRECTIVE ACTION

Check outdoor fan motor according
to the procedure in section 12.5.3
below, if not OK replace controller
Check RV power connections, if OK,
Check RV operation with direct
230VAC power supply, if OK,
Replace outdoor controller.

Perform diagnostics )See 12.3
below(, and follow the actions
described.

Check compressor phase order.

Check and open drainage tube.

Connect base heater.

Perform diagnostics (See 12.3
below), and check if units is
operating by EEPROM parameters.

12.2 Checking the refrigeration system

Checking system pressures and other thermodynamic measures should be done when system
is in Test Mode (in Test mode, system operates in fixed settings). The performance curves
given in this manual are given for unit performance in test mode when high indoor fan speed is
selected.
Entering test mode:
Set unit to Cool/16 degrees/High indoor fan speed, or Heat/30 degrees/High indoor fan speed,
and enter diagnostics.

12-2

Revision Y05-02 Service Manual - K DCI

TROUBLESHOOTING

CONTENTSCONTENTS

12.3 Judgment by Indoor/Outdoor Unit Diagnostics

Enter diagnostics mode - press for five seconds Mode button in any operation mode.
Acknowledgment is by 3 short beeps and lights of COOL and HEAT LEDs. Then, every short
pressing of Mode button will scroll between Indoor and Outdoor unit diagnostic modes by the
acknowledgment of 3 short beeps and lighting of COOL and HEAT LED s.'
During the Outdoor unit diagnostics all four Indoor LED’s, (STBY, Operate, Filter and Timer)
are blinking. When Indoor diagnostics is displayed, all four LED’s (STBY, Operate, Filter and
Timer) are ON.
When system enters diagnostics mode, only one fault code is shown. Order of priority is from
the lower to the higher number. Diagnostics is continuously ON as long as power is ON. The
current system operation mode will not be changed.
If no fault occurred in the system, no fault code will be displayed during normal operation
mode. The last fault code will be displayed even if the system has recovered from that
fault. The last fault will be deleted from the EEPROM after the system has exit diagnostics
mode.
In diagnostics mode, system fault / status will be indicated by blinking of Heat d Cool LEDs.
The coding method will be as follows:
Heat LED will blink 5 times in 5 seconds, and then will be shut off for the next 5 seconds. Cool
LED will blink during the same 5 seconds according to the following Indoor / Outdoor unit
tables:
Note: 0 – OFF, 1-ON

12.3.1 Indoor unit Diagnostics

No Problem 5 4 3 2 1

1 RT-1 is disconnected 00001
2RT-1isshorted 00010
3 RT-2 is disconnected 00011
4RT-2isshorted 00100
5 Reserved 00101
7 Communication mismatch 0 0111

8 No Communication 0 1 0 0 0

No Encoder 0 1 0 0 19
10 Reserved 0 1 0 1 0
11 Outdoor Unit Fault 0101 1

... Reserved

17 Defrost protection 1 0 0 0 1

Deicing Protection 1 0 0 1 0

18
19 Outdoor Unit Protection 1 0 0 1 1
20 Indoor Coil HP Protection 10100

21 Overflow Protection 1 0 1 0 1

22 Reserved
24 EEPROM Not Updated 11000
25 Bad EEPROM 1 1 0 0 1
26 Bad Communication 11010
27 Using EEPROM data 11011
28 Model A 11100

Model B 1 1 1 0 1

29
30ModelC 11110
31ModelD 11111

Revision Y05-02Service Manual - K DCI

12-3

TROUBLESHOOTING

CONTENTSCONTENTS

12.3.2 Indoor unit diagnosis and corrective actions

No.

1

2

3

4

5

6

7

8

9

Fault

Sensor failures of
all types

Communication
mismatch

No Communication

No Encoder

Outdoor Unit Fault

EEPROM Not
Updated

Bad EEPROM

Bad
Communication

Using EEPROM
data

Probable Cause Corrective Action

Indoor and Outdoor
controllers are with different
Versions.
Communication or grounding
wiring is not good.
Indoor electronics or motor Checkmotorwiring,ifok,.

Outdoor controller problem Switch to Outdoor.

System is using ROM
parameters and not
EEPROM parameters.

Communication quality is low
Reliability.

No problem. System is using
EEPROM parameters.

Check sensor connections or
replace sensor.

Replace Indoor controller.

Check Indoor to Outdoor
wiring and grounding.

replace motor, if still not ok,
replace Indoor controller.

diagnostics.
No action, unless special
parameters are required for
unit operation.
No action, unless special
parameters are required for
unit operation.
Check Indoor to Outdoor
wiring and grounding.

12-4

Revision Y05-02 Service Manual - K DCI

12.3.3 Outdoor unit Diagnostics

CONTENTSCONTENTS

No Problem 54321

1 OCT is disconnected 00001
2 OCT is shorted 00010
3 CTT is disconnected 00011
4 CTT is shorted 00100
5 HST is disconnected (when enabled) 00101
6 HST is shorted (when enabled) 00110
7 OAT is disconnected (when enabled) 00111
8 OAT is shorted (when enabled) 01000
9 TSUC is disconnected (when enabled) 01001

10 TSUC is shorted (when enabled) 01010

11 IPM Fault 01011
12 Bad EEPROM 01100
13 DC under voltage 01101
14 DC over voltage 01110
15 AC under voltage 01111
16 IDU/ODU Communication mismatch 10000
17 No Communication 10001
18 Reserved 10010
20 Heat sink Over Heating 10100
21 Deicing 10101
22 Compressor Over Heating 10110
23 Compressor Over Current 10111
24 No OFAN Feedback 11000
25OFAN locked 11001
26 Compressor Lock 11010
27 Bad Communication 11011

TROUBLESHOOTING

1 – ON, 0 – OFF

Only one code is shown. Order of priority is 1-24. Diagnostics is continuously ON as long
power is on.

Revision Y05-02Service Manual - K DCI

12-5

TROUBLESHOOTING

CONTENTSCONTENTS

12.3.4 Outdoor unit diagnosis and corrective actions

o.

Fault

Sensors failures of all
types

IPM Fault Electronics HW

Bad EEPROM No action, unless special

DC under/over Voltage Electronics HW

AC under Voltage Check outdoor unit power

Indoor / Outdoor unit
Communication
mismatch
No Communication Communication or

Compressor Lock Switch unit to STBY and

Bad Communication Communication quality is

Probable Cause Corrective Action

Check sensors
connections or replace
sensors.
Check all wiring and

problem

problem

Indoor and Outdoor
controllers are with
different versions

grounding wiring is not
good.

low reliability

umper settings, if OK,
replace electronics.

parameters are required
for unit operation.
Check outdoor unit power
supply voltage

supply voltage
Replace Indoor controller

Check Indoor to Outdoor
wiring and grounding

restart
Check Indoor to Outdoor
wiring and grounding

12-6

Revision Y05-02 Service Manual - K DCI

TROUBLESHOOTING

CONTENTSCONTENTS

12.4 Judgment by MegaTool

MegaTool is a special tool to monitor the system states.

Using MegaTool requires:

• A computer with RS232C port.

• A connection wire for MegaTool.

• A special MegaTool software.
Use MegaTool according to following procedure:

• Setup MegaTool software: copy the software to the computer.

• Connect RS232C port in computer with MegaTool port in Indoor/Outdoor unit

controller by the connection wire.

• Run the software and choose the COM port, you can monitor the A/C system state
in monitor tab.

12.5 Simple procedures for checking the Main Parts

12.5.1 Checking Mains Voltage.

Confirm that the Mains voltage is between 198 and 264 VAC. If Mains voltage is out of this
range, abnormal operation of the system is expected. If in range check the Power (Circuit)
Breaker and look for broken or loosed cable lugs or wiring mistake(s).

12.5.2 Checking Power Input.

If Indoor unit power LED is unlighted, power down the system and check the fuse of the Indoor
unit. If the fuse is OK replace the Indoor unit controller. If the fuse has blown, replace the fuse
and power up again.
Checking Power Input procedure for the Outdoor unit is the same as with the Indoor unit.

12.5.3 Checking the Outdoor Fan Motor.

Enter Test Mode (where the OFAN speed is high)
Check the voltage between lead wires according to the normal value as following:

• Between red wire and black wire: 310VDC +/- 20V

• Between orange wire and black wire: 15VDC +/- 1V

• Between yellow wire and black wire: 2-6VDC

12.5.4 Checking the Compressor.

The compressor is brushless permanence magnetic DC motor. Three coil resistance is
same. Check the resistance between three poles. The normal value should be below 0.5
ohm (TBD).

12.5.5 Checking the Reverse Valve (RV).

Running in heating mode, check the voltage between two pins of reverse valve

connector, normal voltage is 220VAC.

12.5.6 Checking the electrical expansion valve (EEV).

The EEV has two parts, drive part and valve. The drive part is a step motor
the valve. Check the drive voltage (12VDC). When Outdoor unit is power on, EEV shall
run and have click and vibration.

Revision Y05-02Service Manual - K DCI

12-7

TROUBLESHOOTING

CONTENTSCONTENTS

12.6 Precaution, Advise and Notice Items

12.6.1 High voltage in Outdoor unit controller.

Whole controller, including the wires that are connected to the Outdoor unit controller may
have the potential hazard voltage when power is on. Touching the Outdoor unit controller
may cause an electrical shock.
Advise: Don naked lead wire and don t insert finger, conductor or anything''t touch the
else into the controller when power is on.

12.6.2 Charged Capacitors

Three large-capacity electrolytic capacitors are used in the Outdoor unit controller.
Therefore, charging voltage (380VDC) remains after power down. Discharging takes
about four minutes after power is off. Touching the Outdoor unit controller before
discharging may cause an electrical shock.

12.6.3 Additional advises

• When disassemble the controller or the front panel, turn off the power supply.

• When connecting or disconnecting the connectors on the PCB, hold the whole housing,
dont pull the wire.

• There are sharp fringes and sting on shell. Use gloves when disassemble the A/C
units.

12-8

Revision Y05-02 Service Manual - K DCI

EXPLODED VIEWS AND SPARE PARTS LISTS

K9/12/18 DCI LV

CONTENTSCONTENTS

13. EXPLODED VIEWS AND SPARE PARTS LISTS

13.1 Indoor Unit: K 25, 35, 35S, 50 DCI

Revision Y05-02Service Manual - K DCI

13-1

EXPLODED VIEWS AND SPARE PARTS LISTS

CONTENTSCONTENTS

13.2 Indoor Unit: K 25, 35, 35S 50 DCI (page 2)

（Grill B P/N:372231

CASSETTE AUTO LOUVER

）

13-2

Revision Y05-02 Service Manual - K DCI

EXPLODED VIEWS AND SPARE PARTS LISTS

T

l

r

K

r

CONTENTSCONTENTS

13.3 Indoor Unit: K 25, 35 DCI

ota

No. Part No. Name

1 200014 SCREW 4X16 4 1
2 208023 Clip 2 1
3 372273 Flap(White) 4 1
4 4521915 Front(White) 1 1
5 391746 Signal Line 1 1
6 234132 RECEIVER ASSEMBLY 908-081-00 1 1
7 377135 Front EPS I 3 1
8 377138 Front EPS II 1 1

9 4520900 Grill Attachment Assy. 3 1
10 4520923 Drain Pan 1 1
17 232299
18 4527521 Gas Pipe Assy K9 DCI R410A 1 1
19 4527523 Liquid pipe assy K9 DCI R410A 1 1
20 323436 PUMP PLACEMENT 1 1
21 4522038 Pump assy 1 1
22 369055 DRAIN TUBE 1 1
23 452827401 AUTO-TRANSFORMER 80W FOR K18 DCI 1 1
24 243139 Free Poles terminal block 1 1
25 438413
26 323460 CONNECTION SUPPORT 1 1
28 455000000 single patch Capacitor for fan motor 1.5uF (CBB61S) 1 1
31 4526212 STORM DCI CONTROLLER 916-521-00 1 1
32 452908900 MODEL PLUG K-9 DCI R410A 1 1
34 4520925 Rubber Ring 1 1 1
35 4520901 Electrical Plate Assy. 1 1
36 4520927 Rubber Ring 3 3 1
37 4520894 Support Assy. 1 1
39 4520947 Joint for power cord 2 1
40 326196 Install Support 2 1
41 305136 Side Wall Assy. 2 1
42 300323
43 377131 EPS BLOCK 3 1
44 323432 Corner Support 3 1
45 4520768 Bolt M4x16 4 1
46 4520909 Fresh Air EPS 1 1
47 4520948 Plastical Screw 2 1
48 4527563 coil K9 DCI R410A (2 rows) 1 1
49 4527274 Evaporator Fixing Plate(two rows) K9 R410A 1 1
50 4522157 Rubber Foot for metal-shell motor 3 1
51 261752 MOTOR 36W/4P 230/1/50 1 1
52 4520772 Screw M6x25 3 1
53 293288 Fan 1 1
54 245138 Fan Rubber 1 1
55 4521023 Bolt M5x16 1 1
56 4520898 Fixation Assy. 1 1
57 374152 AIR INTAKE PANEL 1 1
58 4520770 Screw 4.8x40 3 1
59 374019 Drain Plug 1 1
60 221504 FILTER K 1 1
61 4521919 Left Lock (white) 1 1
62 4521920 Right Lock (white) 1 1
63 4521916 Grill A for Cassette (white) 1 1

Indoor Senso

ROOM Senso

CHASSIS ASSY

BLAC

RED

Quan.

11

11

11

Version

Revision Y05-02Service Manual - K DCI

13-3

EXPLODED VIEWS AND SPARE PARTS LISTS

Q

r

K

r

CONTENTSCONTENTS

13.4 Outdoor Unit: K 35S DCI

No. Part No. Name

1 200014 SCREW 4X16 4 1
2 208023 Clip 2 1
3 372273 Flap(White) 4 1
4 4521915 Front(White) 1 1
5 391746 Signal Line 1 1
6 234132 RECEIVER ASSEMBLY 908-081-00 1 1
7 377135 Front EPS I 3 1
8 377138 Front EPS II 1 1

9 4520900 Grill Attachment Assy. 3 1
10 4520923 Drain Pan 1 1
17 232299
18 4527517 Gas Pipe Assy K12 DCI R410A 1 1
19 4527518 Liquid pipe assy K12 DCI R410A 1 1
20 323436 PUMP PLACEMENT 1 1
21 4522038 Pump assy 1 1
22 369055 DRAIN TUBE 1 1
23 452827401 AUTO-TRANSFORMER 80W FOR K18 DCI 1 1
24 243139 Free Poles terminal block 1 1
25 438413
26 323460 CONNECTION SUPPORT 1 1
28 455000000 single patch Capacitor for fan motor 1.5uF (CBB61S) 1 1
31 4526212 STORM DCI CONTROLLER 916-521-00 1 1
32 452908901 MODEL PLUG K-12 DCI R410A 1 1
34 4520925 Rubber Ring 1 1 1
35 4520901 Electrical Plate Assy. 1 1
36 4520927 Rubber Ring 3 3 1
37 4520894 Support Assy. 1 1
39 4520947 Joint for power cord 2 1
40 326196 Install Support 2 1
41 305136 Side Wall Assy. 2 1
42 300323
43 377131 EPS BLOCK 3 1
44 323432 Corner Support 3 1
45 4520768 Bolt M4x16 4 1
46 4520909 Fresh Air EPS 1 1
47 4520948 Plastical Screw 2 1
48 4527561 coil K12 DCI R410A (3 rows) 1 1
49 4526909 Evaporator Fixing Plate(three rows) K12 R410A 1 1
50 4522157 Rubber Foot for metal-shell motor 3 1
51 261752 MOTOR 36W/4P 230/1/50 1 1
52 4520772 Screw M6x25 3 1
53 293288 Fan 1 1
54 245138 Fan Rubber 1 1
55 4521023 Bolt M5x16 1 1
56 4520898 Fixation Assy. 1 1
57 374152 AIR INTAKE PANEL 1 1
58 4520770 Screw 4.8x40 3 1
59 374019 Drain Plug 1 1
60 221504 FILTER K 1 1
61 4521919 Left Lock (white) 1 1
62 4521920 Right Lock (white) 1 1
63 4521916 Grill A for Cassette (white) 1 1
64 452864200 Front Plate Assy./Motorized Louver Cassette White Grill A 1 1

Indoor Senso

ROOM Senso

CHASSIS ASSY

BLAC

RED

Total

uan.

11

11

11

Version

13-4

Revision Y05-02 Service Manual - K DCI

13.5 Indoor Unit: K 50 DCI

r

K

r

Y

CONTENTSCONTENTS

No. Part No. Name

1 200014 SCREW 4X16 4 1
2 208023 Clip 2 1
5 391746 Signal Line 1 1
6 234132 RECEIVER ASSEMBLY 908-081-00 1 1

9 4520900 Grill Attachment Assy. 3 1
10 4520923 Drain Pan 1 1
17 232299
18 452783900 Gas Pipe Assy K18 DCI R410A 1 1
19 452784000 Liquid pipe assy K18 DCI R410A 1 1
20 323436 PUMP PLACEMENT 1 1
21 4522038 Pump assy 1 1
22 369055 DRAIN TUBE 1 1
23 452827400 AUTO-TRANSFORMER 80W FOR K18 DCI 1 1
24 243139 Free Poles terminal block 1 1
25 438413
26 323460 CONNECTION SUPPORT 1 1
28 455000000 single patch Capacitor for fan motor 1.5uF (CBB61S) 1 1
31 4526212 STORM DCI CONTROLLER 916-521-00 1 1
32 452807400 MODEL PLUG K-18 DCI R410A 1 1
34 4520925 Rubber Ring 1 1 1
35 4520901 Electrical Plate Assy. 1 1
36 4520927 Rubber Ring 3 3 1
37 4520894 Support Assy. 1 1
39 4520947 Joint for power cord 2 1
40 326196 Install Support 2 1
41 305136 Side Wall Assy. 2 1
42 300323
43 377131 EPS BLOCK 3 1
44 323432 Corner Support 3 1
45 4520768 Bolt M4x16 4 1
46 4520909 Fresh Air EPS 1 1
47 4520948 Plastical Screw 2 1
48 452783800 coil k18 DCI R410A (3+1) 1 1
49 4526910 Evaporator Fixing Plate(four rows) K15/K18 R410A 1 1
50 4522157 Rubber Foot for metal-shell motor 3 1
51 261752 MOTOR 36W/4P 230/1/50 1 1
52 4520772 Screw M6x25 3 1
53 293288 Fan 1 1
54 245138 Fan Rubber 1 1
55 4521023 Bolt M5x16 1 1
56 4520898 Fixation Assy. 1 1
57 374152 AIR INTAKE PANEL 1 1
58 4520770 Screw 4.8x40 3 1
59 374019 Drain Plug 1 1
60 221504 FILTER K 1 1
61 4521919 Left Lock (white) 1 1
62 4521920 Right Lock (white) 1 1
63 4521916 Grill A for Cassette (white) 1 1
64 452864200 Front Plate Assy./Motorized Louver Cassette White Grill A 1 1
65 4525353 Step motor 2 1
66 4523557 Automatic Flap / White 1 1
67 4523556 Front Plate / White 1 1
68 4524175-4 EPS 4 1 2
69 4524175-3 EPS 3 1 2
70 4524175-2 EPS 2 1 2
71 4524175-1 EPS 1 1 2
72 4525039 Left Bracket for Motor White 1 1
73 4523563 Shaft Adapter 4 1
74 4523562 Gimbal 4 1
75 4523561 Transmission Shaft 2 1
76 4525041 Right Bracket for Motor White 1 1

Indoor Senso

ROOM Senso

CHASSIS ASS

EXPLODED VIEWS AND SPARE PARTS LISTS

Total

Quan.

BLAC

RED

Version

11

11

11

Revision Y05-02Service Manual - K DCI

13-5

EXPLODED VIEWS AND SPARE PARTS LISTS

ONG3-9,12 DCI R410A

CONTENTSCONTENTS

13.6 Outdoor Unit: ONG3 25, 35, 35S DCI

34

32

33

31

30

29

28

27

26

25

24

23

22

21

20

35

36

37

11 12 13 14 15 16 18 1917

109

13-6

ONG3-9,12 DCI R410A

38

39

40

41

42

Revision Y05-02 Service Manual - K DCI

345678

2

1

EXPLODED VIEWS AND SPARE PARTS LISTS

CONTENTSCONTENTS

13.7 Outdoor Unit: ONG3 25, 35, 35S DCI

No. Part No. Description Unit

1 433218

2 4526340

3 433223

4 4526476

5 4527092

6 433215

7 4523060

8 4526299 Partition 1

9 4526403

10 4524177 Gas valve (R410A) 1

11 4524176 Liquid valve(R410A) 1

12 4526224 EMI fliter board 901-098-00 1

13 4526396 Chock Assy. 167-021-01 1

14 4526223 AC-IN connected wire 1

15 4526968 Earthing wire for DCI 1

16 4526222 Fuse connecting wire 1

17 4526300

18 4526220

19 4526219

204107 Cable clip nylon

20

4519188 4 poles terminal block

21

433229 Value cover

22

4522509 4-Way valve coil

23

24 4526367

4526393
4518952 4-way valve (DCI25)

25

4518951 4-way valve (DCI35)

26 4526221

27 4526204

4526775 Compressor top thermistor(CTT)

28

29 4526774

30 4526776

31 4526969

32 4526828

33 4526827

34 4519606

433228 Back side net

35

36 4526368

37 4526298

38 4519614

39 4526480

4519300 Nut M5 L

40

41 433225

42 4519607

Front panel A

Air inlet ring-420

Painting insulation plate

Axial fan OD=401

DC motor for DCI25/35

Motor support

Base painting Assy.

Outdoor DC inverter controller (English)

Therminal sheet

Fuse stand JEF-511B(EHK P/N:150-038-00)

Fuse 65TS(15A,230)150-031-00

4-way valve welding Assy. (DCI25)

4-way valve welding Assy. (DCI35)

Compressor wire

DC Inverter compressor Assy. 5RS102XAB

Outside air thermistor(OAT)

Outside coil thermistor(OCT)

Suction coil thermistor(SUCT)

EEV Coil (CAN-MD 12FKS-1 White)

Electronic expansion value (CAMB20YGFKS-1)

Right side panel

Condenser soldering assy

Bridge

Painting top cover

Gasket for axial fan

Handle

Left side panel painting plate

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Revision Y05-02Service Manual - K DCI

13-7

EXPLODED VIEWS AND SPARE PARTS LISTS

CONTENTSCONTENTS

13.8 Outdoor Unit: K 50 DCI

13-8

Revision Y05-02 Service Manual - K DCI

EXPLODED VIEWS AND SPARE PARTS LISTS

CONTENTSCONTENTS

13.9 Outdoor Unit: K 50 DCI

No. Part No. Description Unit

1 433218
2 4526340
3 433223
4 4526476
5 4526475
6 4526457
7 4527363
8 4526459 Partition 1

9 4526203
10 4524595 Gas valve (R410A) 1
11 4524176 Liquid valve(R410A) 1
12 4526224 EMI fliter board 901-098-00 1
13 4526396 Chock Assy. 167-021-01 1
14 4526223 AC-IN connected wire 1
15 4526968 Earthing wire for DCI 1
16 4526222 Fuse connecting wire 1
17 4526300
18 4526220
19 4526533
20

204107 Cable clip nylon

21

4519188 4 poles terminal block

22

433229 Value cover

23

4522509 4-Way valve coil
24 4527327
25 4518952 4-way valve 1
26 4526221
27 4523446
28

4526775 Compressor top thermistor(CTT)
29 4526774
30 4526776
31 4526969
32 4526215
33 4526216
34 4519606
35

433228 Back side net
36 4526459
37 4526298
38 4519614
39 4526480
40

4519300 Nut M5 L
41 433225
42 4519607

Front panel A
Air inlet ring-420
Painting insulation plate
Axial fan OD=401
DC motor for DCI 50
Motor support
Base painting Assy.

Outdoor DC inverter controller (English)

Therminal sheet
Fuse stand JEF-511B(EHK P/N:150-038-00)
Fuse 65TS(20A,230)150-031-00

4-way valve welding Assy.

Compressor wire
DC Inverter compressor Assy. 5CS130XCC03

Outside air thermistor(OAT)
Outside coil thermistor(OCT)
Suction coil thermistor(SUCT)
Electronic expansion valve ZDPF(L)-1.6C-01-RK for R410A
EEV COIL QA(L)12-HR-01A-RK
Right side panel

Condenser soldering assy
Bridge
Painting top cover
Gasket for axial fan

Handle
Left side panel painting plate

1
1
1
1
1
1
1

1

1
1
1
1
1
1
1
1

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Revision Y05-02Service Manual - K DCI

13-9

APPENDIX A

CONTENTSCONTENTS

APPENDIX A

INSTALLATION AND OPERATION MANUAL

► OPERATION MANUAL K 25, 35, 35S 50 DCI
► INSTALLATION MANUAL K 25, 35, 35S 50 DCI

Revision Y05-02Service Manual - K DCI

14-1

FRANCAIS

APPENDIX A

ENGLISH

DEUTSCH

~

ESPANOL

ITALIANO

ENGLISH

APPENDIX A

2

APPENDIX A

3

5

6

INTRODUCTION

APPENDIX A

This Split Air Conditioner is designed for versatile application:

Cooling.

OPERATI NG TEMPERATURE
RANGE :

-15 ~ 46

Dehumidifying.

Heating.

Filtration.

Ventilation

Test Mode

1

SYSTEM DESCRIPTION

APPENDIX A

3

1

2

4

11

5

6

7

8

9

10

Not connected in multi split applications

2

APPENDIX A

3

4

APPENDIX A

Latch

APPENDIX A

OR

E

G

F

D

A

C

B

5

6

APPENDIX A

APPENDIX A

7

8

APPENDIX A

APPENDIX A

9

APPENDIX A

APPENDIX A

11

APPENDIX A

INSTRUCTIONS D'INSTALLATION

APPENDIX A

INSTALLATION INSTRUCTIONS

INSTALLATION SANLEITUNG

INSTRUCCIONES DE INSTALACIN

ISTRZIONE PER L'INSTALLAZIONE

ENGLISH

DEUTSCH

ITALIANO

INSTALLATION INSTRUCTIONS

APPENDIX A

ACCESSORIES SUPPLIED WITH THE AIR CONDITIONER

1.
LOCATION OF INDOOR AND OUTDOOR UNIT

2.
INSTALLATION OF THE INDOOR UNIT

3.
CONDENSATE HOSE CONNECTION

4.
ELECTRICAL CONNECTION BETWEEN INDOOR AND OUTDOOR

5.
UNIT
REFRIGERANT TUBING

6.
FINAL TASKS

7.

ENGLISH

The appliance shall not be installed in the laundry.

NOTE: This manual is for single split applications.

For multi split applications please use installation manual supplied
within outdoor unit package.

INSTALLATION INSTRUCTIONS

APPENDIX A

FOR DCI SPLIT WALL MOUNTED AIR CONDITIONER

ACCESSORIES SUPPLIED WITH
THE AIR CONDITIONER

Shape Name Qty Used for

T support

Remote control
with batteries

Remote control
bracket

Screws

Screws dowels

Outdoor unit
drain connector

2

Ceiling mounting
of the indoor unit

1

Operation of
unit

1

Wall mounting
of the remote
control

4

Ceiling mounting
of indoor unit

4

Ceiling mounting
of indoor unit

2

Wall mounting

of remote

control bracket

1

Outdoor unit
water drain

LOCATION OF INDOOR AND

21

OUTDOOR UNIT

Select the location considering the following:

INDOOR UNIT

1. Do not install the cassette in a room where gasses, acids
or inflammable products are stored, in order to avoid
damage to the aluminium and copper evaporators and
the internal plastic parts.

2. Do not install the cassette in a workshop or a kitchen. Oil
vapour attracted by the treated air could form deposits on
the cassette evaporators and modify their performance
or damage the cassette's internal plastic parts.

3. Do not install the cassette in a laundry, or a room where
steam is produced.

4. The appliance must be positioned so that the plug is
accessible.

5. The indoor unit is to be built into a suspended ceiling with
panels dimensions of 60 x 60cm .

6. Installing the cassette will be easier with the use of a fork
lift truck. Use the packing base by placing it between the
cassette and the truck forks.

7. It is recommended to install the cassette, as far as is
possible, in the centre of the room, in order to optimise
treated air distribution.

8. For the chosen location, check that the distribution grilles
can be removed and that there is sufficient space
available for access for maintenance and repairs.

2

Mounting pads

Cable ties

Power input

(Optional)

cable

Nut

Air purifying
filter (Optional)

Remote control

operation

Unit operation
Installation manual

4

Padding of indoor
unit

4

Padding of
outdoor unit
bottom support

Securing wires

2

in the indoor and
outdoor unit

1

Connecting indoor
unit power

8

Ceiling mounting
of indoor unit

1

Cleaning the air

3

Users and
installers
reference

OUTDOOR UNIT

1. The location must allow easy servicing and provide
good air circulation .

2. The unit may be suspended from a wall by a bracket
(Optional) or located in a free standing position on the
floor (preferably slightly elevated).

3. If the unit is suspended, ensure that the bracket is
firmly connected and the wall is strong enough to
withstand vibrations.

4. Unit location should not disturb neighbors with noise or
exhaust air stream.

5. Place the mounting pads under the unit legs.

6. Refer to figure 4 for allowed installation distances.

7. When the unit is installed on a wall, install the drain
connector hose and drain plug as shown in .

Fig.1

1.Bottom of outdoor unit

2.Drain connector

Fig 1

as shown in fig 4

fig 1 and fig 2

Fig.2
Drain installation
Example

Fig 2

1

Indoor Unit's Accessories Only for One Unit.

2

To remove

APPENDIX A

To attach

Fig 3

2

1

100 mm

100 mm

nmi

nmi

9000 Btu (2500 W) model
12000 Btu (3500 W) model

18000 Btu (5000 W) model

NOTE:

No additional charge is required.

Capacity

L.MAX.(m) H.MAX.(m)

20 10

30 10

500 mm

nmi

Fig 4

100 mm

nmi

400 mm

1

Fig.4

1. Mounting pads ( 4)

nmi

3

APPENDIX A

INSTALLATION OF THE INDOOR UNIT

CEILING MOUNTING

Mark the position of each support rod.

620

510

620

510

Fig 5

1. Fit the angle attachment fittings supplied with the cassette
onto the threaded rods (not supplied). Recommendedo6
mm maximum 8mm. Take care to distance them from the
suspended ceiling by 270mm or 107mm.

50

I

o

6

107

I

270

WARNING !

If it is indented to install ducting to an adjacent room, refer to
Ceiling mounting for removal of the pre-punched panel
before installing the cassette.

CASSETTE FITTING

Present the cassette to the support rods.

Fig 8

1. In the event that the suspended ceiling is 300 mm from
the ceiling (minimum permitted height), it might be
necessary to temporarily remove some of the suspended
ceiling T supports.

2. Position the cassette on the suspended ceiling support
rods, and start by tightening the side mounting bolts.

Fig 6

2. When fitting the angle attachment fittings in the low
position, remove the insulating foam from around the
mounting nuts.

3. The possibility of fitting the angle attachment fittings at
different heights, leaves the installer the choice of mounting
them on the cassette in the high or low position. Mounting
them in the low position provides for more flexible
installation.

4. Do not tighten the nuts or lock nuts. This will be done only
after having set the cassette in its final horizontal position,
when all the connections have been completed.

270

107

Fig 7

Fig 9

3. Then screw the threaded rods nuts and lock nuts, after
having set the cassette level, maintaining a gap of around
10 mm between the metal chassis and the suspended
ceiling.

CASSETTE INSTALLATION

1. Side openings are provided for installing separate ducts
for outside air intake and treated air distribution to an
adjacent room.

2. Use a punch to remove the condensation protection
insulation and the pre-punched panels from the openings.

Fig 10

TAKE CARE not to damage the heat exchanger coil
located behind the openings.

3. Plug the gaps between the ducts and the opening

APPENDIX A

edge with anti-condensation insulation.

4. Use material which can withstand a continuous
operating temperature of 60 C. The ducts can be of the
flexible type with a spring core or of corrugated
aluminium, covered inside with an insulating material (12
to 25 mm thick glass fibre).

5. When the installation is finished, all the surfaces of the
non-insulated ducts must be covered with anti­condensation insulation material (6 mm thick expanded
polystyrene or expanded neoprene). Fireproofing
classification: M1)

IF THE ABOVE INSTRUCTIONS ARE NOT
FOLLOWED, CONDENSATE FLOWS WILL BUILD UP.

6. Distributing air to an adjacent room requires one or
two of the corresponding ducts' air distribution flaps to
be closed.

7. A decompression grille must be fitted in the partition
between the air conditioned room (where the cassette is
installed) and the adjacent room.

o

CONDENSATE HOSE

4

CONNECTION

CONDENSATE HOSE CONNECTION

1. To ensure effective condensate evacuation, the
downward slope must be 1cm per metre without any
restricted or ascending section.

1 cm/m

50

Siphon

NO

Fig 12

2. The condensate extraction height is limited to a
maximum of 0.60 metre (refer to above diagram)

3. For heights above 0.60 m, an auxiliary condensate
pump with a level regulator should be installed.

Fig 11

Hmax.= 600mm

Fig 13

4. Furthermore, a siphon with a height of at least 50 mm
must be provided to avoid any unpleasant odours in the
room.

5. The condensate evacuation pipe must be heat
insulated to a thickness of 5 to 10 mm with insulating
material such as polyurethane, propylene or neoprene
(Fireproofing clas- sification: M1) to prevent
condensation.

6. If several cassettes are installed in the room, the
evacuation system can be designed as illustrated below.

Fig 14

5

APPENDIX A

ELECTRICAL CONNECTION BETWEEN INDOOR AND OUTDOOR UNIT

ELECTRICAL REQUIREMENTS

Electrical wiring and connections should be made
by qualified electricians and in accordance with
local electrical codes and regulation. The air
conditioner units must be grounded.
The air conditioner unit must be connected to an
adequate power outlet from a separate branch
circuit protected by a time delay circuit breaker, as
specified on unit's nameplate.
Voltage should not vary beyond 10% of the rated
voltage.

1.

To connect the indoor unit to the outdoor unit use
the following electrical cables.

Electrical connections:

Capacity 18000 Btu (5000 W) model

Power
input
cable

Cable
between
indoor and
outdoor
unit

9000 Btu (2500 W) model
12000 Btu (3500 W) model

3 wires 1.5mm

4 wires 1.5mm

2

2

3 wires 2.5mm

4 wires 2.5mm

2

2

Power input cable

8

100

Fig 15a

Cable between indoor and outdoor units

L30m

8

100

Fig 15b

Fig.15 A. OUTDOOR B. INDOOR

8

40

BA

8

40

BA

2. Prepare the cable ends for the power input and
for the cables between outdoor and indoor units
as shown in figure 15a and 15b respectively.

3. Connect the cable ends to the terminals of the
indoor and outdoor units, as shown in fig 16.

4. Secure the multiple wire power cable with the
cable clamps.

NOTES: The wire color code can be selected by

the installer.

TAKE CARE!

(Only auto louver models)

Dont touch the air flap by hand anytime. If the flap swings
abnormally, please contact qualified personnel for service.

Please check carfully the electrical connection before
commissioning, wrong connection may damage the front
assy.

6

5

4
3

N

N

L

C/5

L/4

N/3

~230V - 50HZ

Fig 16

6

APPENDIX A

REFRIGERANT TUBING

CONNECT THE INDOOR TO THE OUTDOOR UNIT

The indoor unit contains a small quantity of nitrogen. Do
not unscrew the nuts from the unit until you are ready to
connect the tubing. The outdoor unit is supplied with
sufficient refrigerant charge (R410A). Refer to outdoor unit
nameplate.

To prevent crushing, bend tubes using a bending tool.

NOTE: Use refrigeration type copper tubing only.

R410A

1. Open the valve cover.

2. Use tubing diameter that corresponds to the tubing
diameter of the indoor and outdoor units. Note that the
liquid and suction tubes have different diameters. (See
tube size, torque tightening table.)

3. Place flares nuts on tube ends before preparing them
with a flaring tool. Use the flare nuts that are mounted
on the supplied outdoor and indoor units.

4. Connect the all ends of the tubing to the indoor and
outdoor units.

Notice the sign. All ends should

correspond one by one.

5. Insulate each tube separately, and their unions, with at
least 6 mm thick of insulation. Wrap the refrigerant
tubing, drain hose and electric cables together with a
vinyl tape (UV protected).

Tightening
torques of unions
and valve caps:

Fig 18

Fig.18

1.Wrench

2.Torque wrench
3 Union.

TUBE SIZE
Liquid line 1/4"
Suction line 3/8"
Suction line 1/2"
Suction line 5/8"

Fig 19

1

2

3

Fig.19
T o prevent refrigerant
leakage, coat the flared
surface with

TORQUE
15-20 N.M.
30-35 N.M.
50-54 N.M.
75-78 N.M.

Fig 20

1

2

3

Fig.20

1.Suction valve

2.Service port

3.Liquid valve

refrigeration oil

AIR DISTRIBUTION MODULE FITTING

1. Carefully unpack the module and fit the clips in the frame
corners.

1

2

3

4

5

6

7

8

9

10

11

12

Fig 17

Caution!

When unscrewing the
valve caps, do not stand
in front of them or the
spindles at any time, as
the system is under
pressure.

Fig.17

1.INDOOR UNIT

2.Liquid tube (small dia.)

3.Suction tube (large dia.)

4.Plugs

5.Flare nuts

6.T ubing between units

7.Suction tube

8.Liquid tube

9.OUTDOOR UNIT

10.Flare nuts

11.Suction valve (large)

12.Liquid valve (small)

Fig 21

2. Present the frame to the unit, and apply pressure so that the
clips engage. Then screw it in place.

Fig 22

3. The seals are illustrated in the diagram below. They

APPENDIX A

avoid:
A Air by pass
B Treated air being distributed into the suspended

ceiling space.

Fig 23

4. After installation, check that the gap between the
frame and the suspended ceiling is less than 5 mm.

FILTER INSTALLATION

1. Place the air intake grille hinges in the openings
marked A then close the grille with the locks on both
sides.

EVACUATION OF THE REFRIGERATION TUBES AND
THE INDOOR UNIT

After connecting the unions of the indoor and outdoor
units, purge the air from the tubes and indoor unit as
follows:

1. Connect the charging hoses with a push pin to the low
side of the charging set and the service port of the
suction valve. Be sure to connect the end of the
charging hose with the push pin to the service port.

2. Connect the center hose of the charging set to a
vacuum pump.

3. Turn on the power switch of the vacuum pump, turn
off the high side switch and make sure that the needle
in the gauge moves from 0 MPa (0cm Hg) to -0.1 MPa
(-76cm Hg). Let the pump run for fifteen minutes.

4. Close the valve of the low side of the charging set and
turn off the vacuum pump. Note that the needle in the
gauge should not move after approximately five
minutes.

5. Not any problem for five minutes, turn on the power
switch of the vacuum pump and open the valve of the
low side of the charging set.

6. Disconnect the charging hose from the vacuum pump
and from the service ports of the suction valve.

7. Tighten the service port caps of suction valve.

8. Redo 1 to 7 for other indoor units.

9. Remove the valve caps from all valves, and open
them using a hexagonal Allen wrench.

10. Remount valve caps onto all of the valves.

11. Check for gas leaks from all the connecting position.
Test with electronic leak detector or with a sponge
immersed with soapy water for bubbles.

2. A void bending the frame with excessive pulling. The
frame must be correctly centred in relation to the
suspended ceiling and, above all, it must provide an
hermetic separation between the air intake and the air
distribution.

Fig 24

Fig 25

Fig.25

1. Charging set

2. Vacuum pump

3. OUTDOOR UNIT

4. Service valve

5. Cap

6. Suction valve

7. Service valve*

8. Cap

NOTE
For additional
charge of various
tubing lengths,
refer to outdoor
unit nameplate.

9. Liquid valve

10. INDOOR UNIT

11. Suction flare connection

12. Liquid flare connection

*In some models only

7

APPENDIX A

FINAL TASKS

1. Check all valve caps and ensure that they had been tightened properly. Close the valve cover.

2. Fill gaps on the wall between hole sides and tubing with sealer.

3. Attach wiring and tubing to the wall with clamps where necessary.

4. Operate the unit for no less than 5 minutes at heating or cooling mode.

5. Explain filter removal, cleaning and installation.

6. Operate the air conditioner together with the customer and explain all functions.

7. Give the operating and installation manuals to the customer.

APPENDIX A

Pact No:452815700/01