Electra ECF9 DCI INV, OUECF 9 DCI INV, ECF12 DCI INV, OUECF 12 DCI INV, ECF18 DCI INV Service Manual

Service Manual

ECF DCI Inverter series

REFRIGERANT

R410A

HEAT PUMP

Indoor Units Outdoor Units

ECF9 DCI INV OUECF 9 DCI INV

ECF12 DCI INV OUECF 12 DCI INV

ECF18 DCI INV OUECF 18 DCI INV

TM-ECFDCI-E-1-GB 12-2004

A

LIST OF EFFECTIVE PAGES

Service Manual − ECF DCI

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 ....... 0 ........ December 2004

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

Page
No.

Revision
No. #

Page
No.

Revision
No. #

Page
No.

Revision
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 ................ 1

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

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

11-1-11-16 ............. 2

12-1-12-8 .............. 0

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

• 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

i

TABLE OF CONTENTS

Revision Y05-02Service Manual - ECF DCI

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

1-1

INTRODUCTION

Revision Y05-02Service Manual - ECF DCI

1. INTRODUCTION

1.1 General

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

• ECF 9 DCI INV

• ECF 12 DCI INV

• ECF 18 DCI INV

The New DCI ECF units can be easily fitted to residential and commercial applications
featuring esthetic design, compact dimensions, and low noise operation.

1.2 Main Features

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

• DC Inverter technology

• R410A

• High COP (level A)

• Lego Concept

• Pre-Charged units up to the max’ allowing 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.

1-2

INTRODUCTION

Revision Y05 Service Manual - ECF DCI

1.3 Filtration

The ECF DC 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 controllers: 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.

1.5 Outdoor Unit

The ECF 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 9 DCI

• ONG 12 DCI

• ONG 18

Outdoor Unit Features:

Features ONG 9,12, 18, 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

• MIU (K) MODBUS Interface Unit

• Base heater

• M2L cable

1.8 Inbox Documentation

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

1-3

INTRODUCTION

Revision Y05-02Service Manual - ECF DCI

1.9 Matching Table

1.9.1 R410A

OUTDOOR UNITS

INDOOR UNITS

MODEL REF FLO 9DCI FLO12 DCI ECF9 DCI ECF12 DCI ECF18 DCI

OUECF9 DCI R410A

√√

OUECF12 DCI R410A

√√

OUECF18DCI R410A

√

The above table lists outdoor units and ECF 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,

2-1

PRODUCT DATA SHEET

Revision Y05-02Service Manual - ECF DCI

2. PRODUCT DATA SHEET

2.1 ECF25 DCI

Model Indoor Unit ECF25 DCI
Model Outdoor Unit ONG25 DCI

Installation Method Flare

Characteristics Units Cooling Heating

Btu/hr

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

Capacity

(1)

W

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

Power Input

(1)

W

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

COP

(1)

W/W

4.24 3.72

Energy Efficiency Class A A

Power Supply V/Ph/Hz

220-240V / 1Ph / 50Hz

Rated Current A

2.7 4.2

Starting Current A

10.50

Circuit Breaker Rating A 16

Fan Type & Quantity Centrifugal*1

Airflow

(2)

H/M/L m3/hr

570-500-435 600-530-450

External Static Pressure Min-Max Pa N/A

Sound Power Level

(3)

H/L dB (A)

42-48 42-47

Sound Pressure Level

(4)

H/L dB (A)

32-38 32-37

Moisture Removal L/hr

1.0

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

INDOOR

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

(4)

H dB (A) 50 51

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

Liquid Line

(mm)In

(6.35)

¼”

Suction Line

(mm)In

(9.53)

”

Max. Tubing Length m 20

OUTDOOR

Connections
Between Units

Max. Height Difference m 10

Operation Control Type IR Remote Control

(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.

38

395

2-2

PRODUCT DATA SHEET

Revision Y05-02 Service Manual - ECF DCI

2.2 ECF35 DCI

Model Indoor Unit ECF35 DCI
Model Outdoor Unit ONG35 DCI

Installation Method Flare

Characteristics Units Cooling Heating

Btu/hr

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

Capacity

(1)

W

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

Power Input

(1)

W

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

COP

(1)

W/W

3.68 3.23

Energy Efficiency Class A A

Power Supply V/Ph/Hz

220-240V / 1Ph / 50Hz

Rated Current A

4.1 5.6

Starting Current A

10.50

Circuit Breaker Rating A 16

Fan Type & Quantity Centrifugal*1

Airflow

(2)

H/M/L m3/hr

580-510-435 620-560-450

External Static Pressure Min-Max Pa N/A

Sound Power Level

(3)

H/L dB (A)

42-48 42-47

Sound Pressure Level

(4)

H/L dB (A)

32-38 32-37

Moisture Removal L/hr

1.5

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

INDOOR

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)

62 62

Sound Pressure Level

(4)

H dB (A)

52 52

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

Liquid Line

(mm)In

(6.35)

¼”

Suction Line

(mm)In

(9.53)

”

Max. Tubing Length m 20

OUTDOOR

Connections
Between Units

Max. Height Difference m 10

Operation Control Type IR Remote Control

(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.

38

395

2-4

PRODUCT DATA SHEET

Revision Y05-0 Service Manual -ECF DCI

2.4 ECF18 DCI

Model Indoor Unit ECF18 DCI
Model Outdoor Unit ONG35 DCI

Installation Method Flare

Characteristics Units Cooling Heating

Btu/hr

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

Capacity

(1)

W

5000 (1350 – 6400) 6300 (1350 – 7500)

Power Input

(1)

W

1550 (530 – 2000) 1740 (350 – 2080)

COP

(1)

W/W

3.23 3.62

Energy Efficiency Class A A

Power Supply V/Ph/Hz

220-240V / 1Ph / 50Hz

Rated Current A

7.1 8.0

Starting Current A

10.50

Circuit Breaker Rating A 16

Fan Type & Quantity Centrifugal*1

Airflow

(2)

H/M/L m3/hr

730-630-510

External Static Pressure Min-Max Pa N/A

Sound Power Level

(3)

H/M/L dB (A)

46 – 55 - 59

Sound Pressure Level

(4)

H/M/L dB (A)

36 – 44 - 48.5

Moisture Removal L/hr

2

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

INDOOR

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)

62 63

Sound Pressure Level

(4)

H dB (A)

52 53

Dimensions W/H/D mm 795 610 290

Weight kg

43

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

Liquid Line

(mm)In

(6.35)

¼”

Suction Line

(mm)In

(12.7)

½”

Max. Tubing Length m 30

OUTDOOR

Connections
Between Units

Max. Height Difference m 10

Operation Control Type IR Remote Control

(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.

395

3-1

RATING CONDITIONS

Revision Y05-02Service Manual - ECF DCI

3. RATING CONDITIONS

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

Cooling:

Indoor: 27

o

C DB 19oC WB

Outdoor: 35

o

C DB

Heating:

Indoor: 20

o

C DB

Outdoor: 7

o

C DB 6oC WB

3.1 Operating Limits

Indoor Outdoor

Cooling

Upper limit 32

o

C DB 23oC WB 46oC DB

Lower limit 21

o

C DB 15oC WB -10oC DB

Heating

Upper limit 27oC DB 24oC DB 18oC WB

Lower limit 10

o

C DB -15oC DB -16oC WB

Voltage

1PH 198 – 264 V

3PH N/A

4-1

OUTLINE DIMENSIONS

Revision Y05-02Service Manual - ECF DCI

4. OUTLINE DIMENSIONS

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

4.2

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

5-1

PERFORMANCE DATA

Revision Y05-02Service Manual - ECF DCI

5. PERFORMANCE DATA

5.1 ECF25 DCI

5.1.1 Cooling Capacity (kW) - Run Mode

ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC]

OD COIL

ENTERING AIR DB

TEMPERATURE [C

0

]

DATA

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

-10 - 20

(protection range)

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

PI 25 - 50 % of nominal

25

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

30

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

0.54

0.54 0.55

35

TC 2.18 2.34

2.50

2.66 2.82

SC 1.98 2.03 2.07 2.11 2.16

PI 0.57 0.58

0.59

0.60 0.61

40

TC 2.07 2.23

2.38

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

46

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., (

o

C)

DB – Dry Bulb Temp., (

o

C)
ID – Indoor
OD – Outdoor

5.1.2 Capacity Correction Factors

Cooling Capacity Ratio Vs. Outdoor Temperature

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

20 25 30 35 40 45

Outdoor T emperature [deg C]

Capacity Rat ion

5-2

PERFORMANCE DATA

Revision Y05-02 Service Manual - ECF DCI

5.1.3 Heating Capacity (kW) - Run Mode

ID COIL ENTERING AIR DB TEMPERATURE [ºC]

OD COIL

ENTERING AIR DB/

WB TEMPERATURE

[ºC]

DATA 15 20 25

-15/-16

TC 2.16 2.01 1.86

PI 0.55 0.60 0.66

-10/-12

TC 2.41 2.26 2.11

PI 0.66 0.72 0.77

-7/-8

TC 2.59 2.44 2.29

PI 0.75 0.80 0.86

-1/-2

TC 2.68 2.53 2.38

PI 0.79 0.84 0.90

2/1

TC 2.75 2.59 2.44

PI 0.82

0.87

0.93

7/6

TC 3.55

3.40

3.25

PI 0.86

0.92

0.97

10/9

TC 3.75

3.60

3.44

PI 0.91 0.97 1.02

15/12

TC 3.94 3.79 3.64

PI 0.96 1.02 1.07

15-24

TC 85 - 105 % of nominal

(Protection Range)

PI 80 - 120 % of nominal

LEGEND

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

o

C)

DB – Dry Bulb Temp., (

o

C)
ID – Indoor
OD – Outdoor

5.1.4 Capacity Correction Factors

Heating Capacity Ratio Vs. Outdoor Temperature

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [deg C]

Capacity Rat ion

5-3

PERFORMANCE DATA

Revision Y05-02Service Manual - ECF DCI

5.2 Capacity Correction Factor Due to Tubing Length

5.2.1 Cooling

0.91

0.92

0.93

0.94

0.95

0.96

0.97

0.98

0.99

1.00

1.01

3 4 5 6 7 8 9 1011121314151617181920

Tubing Length [m]

Capacity Rati o

5.2.2 Heating

0.90

0.92

0.94

0.96

0.98

1.00

1.02

3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Tubing Length [m]

Capacity Ratio

5-4

PERFORMANCE DATA

Revision Y05-02 Service Manual - ECF DCI

5.3 ECF35 DCI

5.3.1 Cooling Capacity (kW) - Run Mode

ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC]

OD COIL

ENTERING AIR DB

TEMPERATURE [ºC]

DATA

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

-10 - 20

(protection range)

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

PI 25 - 50 % of nominal

25

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

30

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

0.86

0.88 0.89

35

TC 3.06 3.28

3.50

3.72 3.94

SC 2.51 2.57 2.62 2.67 2.73

PI 0.92 0.94

0.95

0.96 0.98

40

TC 2.89 3.12

3.34

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

46

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., (

o

C)

DB – Dry Bulb Temp., (

o

C)
ID – Indoor

5.3.2 Capacity Correction Factors

Cooling Capacity Ratio Vs. Outdoor Temperature

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

20 25 30 35 40 45

Outdoor T emperature [de g C]

Capacity Rat ion

5-5

PERFORMANCE DATA

Revision Y05-02Service Manual - ECF DCI

5.3.3 Heating Capacity (kW) - Run Mode

ID COIL ENTERING AIR DB TEMPERATURE [ºC]

OD COIL

ENTERING AIR DB/

WB TEMPERATURE

[ºC]

DATA 15 20 25

-15/-16

TC 2.74 2.55 2.35

PI 0.80 0.88 0.96

-10/-12

TC 3.05 2.86 2.66

PI 0.96 1.04 1.12

-7/-8

TC 3.28 3.09 2.90

PI 1.09 1.17 1.25

-1/-2

TC 3.39 3.20 3.01

PI 1.15 1.23 1.31

2/1

TC 3.47 3.28 3.09

PI 1.19

1.27

1.35

7/6

TC 4.49

4.30

4.11

PI 1.25

1.33

1.41

10/9

TC 4.74

4.55

4.36

PI 1.32 1.40 1.49

15/12

TC 4.99 4.80 4.60

PI 1.40 1.48 1.56

15-24

TC 85 - 105 % of nominal

(Protection Range)

PI 80 - 120 % of nominal

LEGEND

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

o

C)

DB – Dry Bulb Temp., (

o

C)
ID – Indoor
OD – Outdoor

5.3.4 Capacity Correction Factors

Heating Capacity Ratio Vs. Outdoor Temperature

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [de g C]

Capacity Rat ion

5-6

PERFORMANCE DATA

Revision Y05-02 Service Manual - ECF DCI

5.4 Capacity Correction Factor Due to Tubing Length

5.4.1 Cooling

0.91

0.92

0.93

0.94

0.95

0.96

0.97

0.98

0.99

1.00

1.01

3 4 5 6 7 8 9 1011121314151617181920

Tubing Length [m]

Capacity Ratio

5.4.2 Heating

0.90

0.92

0.94

0.96

0.98

1.00

1.02

3 4 5 6 7 8 9 1011121314151617181920

Tubing Length [m]

Capacity Rati o

5-7

PERFORMANCE DATA

Revision Y05-02Service Manual - ECF DCI

5.5 ECF35S DCI

5.5.1 Cooling Capacity (kW) - Run Mode

ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC]

OD COIL

ENTERING AIR DB

TEMPERATURE [ºC]

DATA

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

-10 - 20

(protection range)

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

PI 25 - 50 % of nominal

25

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

30

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

0.79

0.80 0.82

35

TC 3.06 3.28

3.50

3.72 3.94

SC 2.51 2.57 2.62 2.67 2.73

PI 0.84 0.86

0.87

0.88 0.90

40

TC 2.89 3.12

3.34

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

46

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., (

o

C)

DB – Dry Bulb Temp., (

o

C)
ID – Indoor
OD – Outdoor

5.5.2 Capacity Correction Factors

Cooling Capacity Ratio Vs. Outdoor Temperature

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

20 25 30 35 40 45

Outdoor Te mperature [deg C]

Capacity Rat ion

5-8

PERFORMANCE DATA

Revision Y05-02 Service Manual - ECF DCI

5.5.3 Heating Capacity (kW) - Run Mode

ID COIL ENTERING AIR DB TEMPERATURE [ºC]

OD COIL

ENTERING AIR DB/

WB TEMPERATURE

[ºC]

DATA 15 20 25

-15/-16

TC 2.86 2.66 2.46

PI 0.71 0.78 0.85

-10/-12

TC 3.19 2.99 2.79

PI 0.85 0.93 1.00

-7/-8

TC 3.43 3.23 3.03

PI 0.96 1.03 1.11

-1/-2

TC 3.55 3.35 3.15

PI 1.02 1.09 1.16

2/1

TC 3.63 3.43 3.23

PI 1.05

1.13

1.20

7/6

TC 4.70

4.50

4.30

PI 1.11

1.18

1.25

10/9

TC 4.96

4.76

4.56

PI 1.17 1.25 1.32

15/12

TC 5.22 5.02 4.82

PI 1.24 1.31 1.38

15-24

TC 85 - 105 % of nominal

(Protection Range)

PI 80 - 120 % of nominal

LEGEND

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

o

C)

DB – Dry Bulb Temp., (

o

C)
ID – Indoor
OD – Outdoor

5.5.4 Capacity Correction Factors

Heating Capacity Ratio Vs. Outdoor Temperature

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [deg C]

Capacity Ration

5-9

PERFORMANCE DATA

Revision Y05-02Service Manual - ECF DCI

15.6 Capacity Correction Factor Due to Tubing Length

5.6.1 Cooling

0.91

0.92

0.93

0.94

0.95

0.96

0.97

0.98

0.99

1.00

1.01

3 4 5 6 7 8 9 1011121314151617181920

Tubing Length [m]

Capacity Ratio

5.6.2 Heating

0.90

0.92

0.94

0.96

0.98

1.00

1.02

3 4 5 6 7 8 9 1011121314151617181920

Tubing Length [m]

Capacity Rati o

5-10

PERFORMANCE DATA

Revision Y05-02 Service Manual - ECF DCI

5.7 ECF50 DCI

5.7.1 Cooling Capacity (kW) - Run Mode

ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC]

OD COIL

ENTERING AIR DB

TEMPERATURE [ºC]

DATA

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

-10 - 20

(protection range)

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

PI 25 - 50 % of nominal

25

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

30

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

1.42

1.45 1.48

35

TC 4.35 4.63

4.92

5.20 5.49

SC 3.04 3.09 3.14 3.19 3.24

PI 1.54 1.56

1.59

1.62 1.64

40

TC 4.10 4.39

4.67

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

46

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., (

o

C)

DB – Dry Bulb Temp., (

o

C)
ID – Indoor
OD – Outdoor

5.7.2 Capacity Correction Factors

Cooling Capacity Ratio Vs. Outdoor Temperature

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

20 25 30 35 40 45

Outdoor Temperature [deg C]

Capacity Ration

5-11

PERFORMANCE DATA

Revision Y05-02Service Manual - ECF DCI

5.7.3 Heating Capacity (kW) - Run Mode

ID COIL ENTERING AIR DB TEMPERATURE [ºC]

OD COIL ENTERING

AIR DB/WB

TEMPERATURE [ºC]

DATA 15 20 25

-15/-16

TC 2.66 2.28 1.90

PI 1.15 1.23 1.31

-10/-12

TC 3.52 3.13 2.75

PI 1.30 1.38 1.46

-7/-8

TC 4.16 3.77 3.39

PI 1.41 1.49 1.57

-1/-2

TC 4.47 4.09 3.71

PI 1.46 1.55 1.63

2/1

TC 4.69 4.30 3.92

PI 1.50

1.58

1.66

7/6

TC 6.24

5.85

5.47

PI 1.56

1.64

1.72

10/9

TC 6.56

6.18

5.79

PI 1.59 1.67 1.75

15/12

TC 6.88 6.50 6.12

PI 1.62 1.70 1.78

15-24

(Protection Range)

TC 85 - 105 % of nominal

PI 80 - 120 % of nominal

LEGEND

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

o

C)

DB – Dry Bulb Temp., (

o

C)
ID – Indoor
OD – Outdoor

5.7.4 Capacity Correction Factors

Heating Capacity Ratio Vs. Outdoor Temperature

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

-15 -10 -5 0 5 10 15

Outdoor WB Te mperature [deg C]

Capacity Rat ion

5-12

PERFORMANCE DATA

Revision Y05-02 Service Manual - ECF DCI

5.8 Capacity Correction Factor Due to Tubing Length

5.8.1 Cooling

0.993

0.994

0.995

0.996

0.997

0.998

0.999

1.000

1.001

0 5 10 15 20 25 30 35

Tubing Length[m]

Capacity Ratio

5.8.2 Heating

0.86

0.88

0.90

0.92

0.94

0.96

0.98

1.00

1.02

0 5 10 15 20 25 30 35

Tubing Length[m]

Capacity Ratio

6-1

PRESSURE CURVES

Revision Y05-02Service Manual - ECF DCI

6. PRESSURE CURVES

6.1 Model: ECF 25 DCI

6.1.1 Cooling – Test Mode

Suction Pressure Vs.Outdoor Temp' - Cooling

500

600

700

800

900

1000

1100

1200

1300

1400

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

Suction Pressure [kPa]

22/15

24/17

27/19

29/21

32/23

Indoor DB/WB

Temp.

Discharge Pressure Vs.Outdoor Temp'- Cooling

1000

1250

1500

1750

2000

2250

2500

2750

3000

3250

3500

3750

4000

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

Discharge Pressure [kPa]

22/15

24/17

27/19

29/21

32/23

Indoor

DB/W B

6-2

PRESSURE CURVES

Revision Y05-02 Service Manual - ECF DCI

6.1.2 Heading – Test Mode

Suction Pressure Vs. Outdoor Temp' - Heating

200

300

400

500

600

700

800

900

1000

1100

1200

1300

-15 -10 -5 0 5 10 15

Outdoor WB Temperature[ºC]

Suction Pressure [kPa]

15

20

25

Indoor DB

Discharge Pressure Vs.Outdoor Temp'- Heating

1000

1250

1500

1750

2000

2250

2500

2750

3000

3250

3500

3750

4000

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [ºC]

Discharge Pressure [kPa]

15

20

25

Indoor DB

6-3

PRESSURE CURVES

Revision Y05-02Service Manual - ECF DCI

6.2 Model: ECF 35 DCI

6.2.1 Cooling – Test Mode

Suction Pressure Vs.Outdoor Temp' - Cooling

500

600

700

800

900

1000

1100

1200

1300

1400

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

Suction Pressure [kPa]

22/15

24/17

27/19

29/21

32/23

Indoor

DB/W B

Discharge Pressure Vs.Outdoor Temp'- Cooling

1000

1250

1500

1750

2000

2250

2500

2750

3000

3250

3500

3750

4000

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

Discharge Pressure [kPa]

22/15

24/17

27/19

29/21

32/23

Indoor

DB/WB

6-4

PRESSURE CURVES

Revision Y05-02 Service Manual - ECF DCI

6.2.2 Heating – Test Mode

Suction Pressure Vs.Outdoor Temp' - Cooling

500

600

700

800

900

1000

1100

1200

1300

1400

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

Suction Pressure [kPa]

22/15

24/17

27/19

29/21

32/23

Indoor

DB/W B

Discharge Pressure Vs.Outdoor Temp'- Cooling

1000

1250

1500

1750

2000

2250

2500

2750

3000

3250

3500

3750

4000

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

Discharge Pressure [kPa]

22/15

24/17

27/19

29/21

32/23

Indoor

DB/WB

6-5

PRESSURE CURVES

Revision Y05-02Service Manual - ECF DCI

6.3 Model: ECF 35S DCI

6.3.1 Cooling – Test Mode

Suction Pressure Vs.Outdoor Temp' - Cooling

500

600

700

800

900

1000

1100

1200

1300

1400

10 15 20 25 30 35 40 45

Outdoor DB Temperature[ºC]

Suction Pressure [kPa]

22/15

24/17

27/19

29/21

32/23

Indoor

DB/WB

Discharge Pressure Vs.Outdoor Temp' - Cooling

1000

1250

1500

1750

2000

2250

2500

2750

3000

3250

3500

3750

4000

10 15 20 25 30 35 40 45

Outdoor DB Temperature[ºC]

Discharge Pressure [kPa]

22/15

24/17

27/19

29/21

32/23

Indoor

DB/WB

6-6

PRESSURE CURVES

Revision Y05-02 Service Manual - ECF DCI

6.3.2 Heating – Test Mode

Suction Pressure Vs.Outdoor Temp' - Heating

200

300

400

500

600

700

800

900

1000

1100

1200

1300

-15 -10 -5 0 5 10 15

Outdoor WB Temperature[ºC]

Suction Pressure [kPa]

15

20

25

Discharge Pressure Vs.Outdoor Temp' - Heating

1000

1250

1500

1750

2000

2250

2500

2750

3000

3250

3500

3750

4000

-15 -10 -5 0 5 10 15

Outdoor WB Temperature[ºC]

Discharge Pressure [kPa]

15

20

25

Indoor DB

Indoor DB

6-7

PRESSURE CURVES

Revision Y05-02Service Manual - ECF DCI

6.4 Model: ECF 50 DCI

6.4.1 Cooling – Test Mode

Suction Pressure Vs.Outdoor Temp' - Cooling

500

600

700

800

900

1000

1100

1200

1300

1400

10 15 20 25 30 35 40 45

Outdoor DB Temperature[ºC]

Suction Pressure [kPa]

22/15

24/17

27/19

29/21

32/23

Indoor

DB/WB

Discharge Pressure Vs.Outdoor Temp' - Cooling

1000

1250

1500

1750

2000

2250

2500

2750

3000

3250

3500

3750

4000

4250

10 15 20 25 30 35 40 45

Outdoor DB Temperature[ºC]

Discharge Pressure [kPa]

22/15

24/17

27/19

29/21

32/23

Indoor

DB/WB

6-8

PRESSURE CURVES

Revision Y05-02 Service Manual - ECF DCI

6.4.2 Cooling – Test Mode

Suction Pressure Vs.Outdoor Temp' - Heating

200

300

400

500

600

700

800

900

1000

1100

-15 -10 -5 0 5 10 15

Outdoor WB Temperature[ºC]

Suction Pressure [kPa]

15

20

25

Discharge Pressure Vs.Outdoor Temp' - Heating

1000

1250

1500

1750

2000

2250

2500

2750

3000

3250

3500

3750

4000

-15 -10 -5 0 5 10 15

Outdoor WB Temperature[ºC]

Discharge Pressure [kPa]

15

20

25

Indoor DB

Indoor DB

7-1

ELECTRICAL DATA

Revision Y05-02Service Manual - ECF DCI

7. ELECTRICAL DATA

7.1 Single Phase Units

Model ECF 25 DCI ECF35/35S DCI ECF 50 DCI
Power Supply 1 PH, 220-240 VAC, 50Hz

Connected to Indoor
Maximum Current 10 A 12 A

Inrush Current

(a)

35 A

Starting Current

(b)

10 A 10.5 A

Circuit breaker 16 A 20 A

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

2

3 X 2.5 mm

2

Interconnecting cable no. x cross section 4 X 1.5 mm

2

4 X 2.5 mm

2

(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

8-1

WIRING DIAGRAMS

Revision Y05-02Service Manual - ECF DCI

8. WIRING DIAGRAMS

8.1 ECF25, 35, 35S, 50 DCI

esaB

retaeh

2

kcalB

eulB

deR

MOC

F-L

F-N

N

L

MOCN

HTRAE

MOC

HTRAE

01P

21P

MOC

N
L

MOC-N

G/Y

G/Y

HTRAE

V

9P

U

3P

W

31P11P

1

4
P

41P

2

1

1P

lioc ekohC

Brown
Red

Black

White

PMOC

Blue

esreveR

evlav

YLPPUS REWOP

gnir citengam

nworB

eulB

deR

ESUF

nworB

deR

G/Y

3/N

4/L

5/C

G/Y

8P

3

lootagem

7P9PJ

5

31
2

5
4

6

6

EEV

3
4

1
2

6P

1

2

71P

Red

61P

Blue

Black

Orange

Yellow

12P

2
2
P

8
1
P

2

91P

1
2

1

2P

11
2

02P

4

TCUS

EARTH

2 1

Vdc

4 3

6 5

Vsp
Vcc

FG

NAFO

TCOTTCTAO

yalpsiD

2

eulB

G/Y

nworB

deR

Outdoor Unit Controller PCB

Outdoor Unit Circuit Diagram

EMI filter PCB

9-1

REFRIGERATION DIAGRAMS

Revision Y05-02Service Manual -ECF DCI

9. REFRIGERATION DIAGRAMS

9.1 ECF 25, 35,35S, 50 DCI

10-1

TUBING CONNECTIONS

Revision Y05-02Service Manual - ECF DCI

10. TUBING CONNECTIONS

TUBE (Inch)

TORQUE (Nm)

¼” ⅜” ½” ⅝” ¾”

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.

11-1

CONTROL SYSTEM

Revision Y05-02Service Manual - ECF DCI

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

Max NLOADIF1C

127

Medium

Max NLOADIF2C

127

High

Max NLOADIF3C

127

Turbo

Max NLOADIF4C

127

Auto

Max NLOADIF5C

127

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

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

Maximum frequency

10 < NLOAD < 127 Interpolated value between minimum and maximum frequency
10

Minimum frequency

0 Compressor is stopped

11-2

CONTROL SYSTEM

Revision Y05-02 Service Manual - ECF DCI

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

MaxFreqAsOAT1H

15 ≤ OAT < 24

MaxFreqAsOATC

24 ≤ OAT No limit

MaxFreqAsOAT2H

11.1.4 Frequency Changes Control

Frequency change rate is 1 Hz/sec.

11.1.5 Compressor Starting Control

Frequency

Time

Min 10 Minutes

1

Minute

Step 1

Step 3

1

Minute

Step 2

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

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.><

11-3

CONTROL SYSTEM

Revision Y05-02Service Manual - ECF DCI

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

0

C, or HST 50>0C
or
Faulty OAT

B Cooling with 20

0

C>OAT>500C

C Cooling with 7

0

C>OAT

D Heating with OAT 15>

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 Ex pansion valve) Control

EEV opening is defined as EEV = EEVOL+ EEV

CV

EEVOLis the initial EEV opening as a function of the compressor frequency, operation mode, unit
model and capacity.
EEV

CV

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

During the first 10 minutes of compressor operation EEV

CV

0.=

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

CV

(n) =

EEV

CV

(N-1) + EEV

CTT

EEV

CTT

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

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.

11-4

CONTROL SYSTEM

Revision Y05-02 Service Manual -ECF DCI

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

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

0

C.

When OAT is disconnected, Base Heater will be on when unit is in heating.

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

Compensation Enabled

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

Disabled

Compensation Enabled

11-5

CONTROL SYSTEM

Revision Y05-02Service Manual - ECF DCI

11.4.2 Indoor Fan Control in Heat Mode

Indoor fan speed depends on the indoor coil temperature:

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

ICT<-2SC SCSC SCSC

Fast
Increasing

Increasing No change Decreasing Fast

Decreasing

-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

ICTST

ICTVL ICTTICTHICTL

11-6

CONTROL SYSTEM

Revision Y05-02 Service Manual -ECF DCI

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≤49SRSRSRD1D2
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.

Normal

P1

P2

Stop-Compresor

CTTOH1

CTTOH2

CTTOH3

CTTOH4

CTT

P3

Control Status Compressor Temperature

Increases

Else

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

11.7.4 Compressor over Current Protection

Normal

Stop-Rise

HzDown1

HzDown2

Stop-Compresor

CCROC1

CCROC2

CCROC3

CCROC4

CCR

11-7

CONTROL SYSTEM

Revision Y05-02Service Manual - ECF DCI

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≤90 D1 D2 D2
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.

11-8

CONTROL SYSTEM

Revision Y05-02 Service Manual - ECF DCI

11.7.6.2 Deicing Protection Procedure

COMP

RV

OFAN

EEV

ON

HEAT

COOL

ON

OFF

EEVDeicerOpen

Any

T1 T2

T3 T3

T1

12

0

Threshold

max. 12 minutes

DT

OCT

T1 = T2 =

36 seconds, T3 nds= 6 seco

11.8 Condensate Water Over Flow Protection

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

11-9

CONTROL SYSTEM

Revision Y05-02Service Manual - ECF DCI

Water Level

ANY

0

BLINK

NLOAD

OPER LED

LEVEL1

LEVEL 3

LEVEL4

NORMAL

ON

Pump

OFF

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

models)

P2 P3 Level

Don`t
care

1 Normal

Don`t
care

0 Overflow

ANY

0

ON

NLOAD

PUMP

OFF

ON

OPER

LED

OFF

Overflow

Water Level

Normal

BLINK

NLOAD is

forced to 0

8min 8min

Overflow when

unit is ON

Overflow when

unit is OFF

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

11-10

CONTROL SYSTEM

Revision Y05-02 Service Manual - ECF DCI

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

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

receive the R/C commands

OPERATION INDICATOR

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).

TIMER INDICATOR Lights up during Timer and Sleep operation.

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

COOLING INDICATOR

Lights up when system is switched to Cool Mode by using the Mode
Switch on the unit.

HEATING INDICATOR

Lights up when system is switched Heat Mode by using the Mode
Switch on the unit.

Mode SWITCH

(COOL/HEAT/OFF)

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.

RESET / FILTER

SWITCH

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.

11-11

CONTROL SYSTEM

Revision Y05-02Service Manual - ECF DCI

11.11.2 Indoor Unit Controls and Indicators for LCD Display

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

OFF(2*)

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

SPT(1*)

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

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

(Low)

OFF

(Med)

OFF

(High)

OFF

(Turbo)

OFF

(Auto)

OFF

User
setting
IFAN
speed

User
setting
IFAN
speed

User
setting
IFAN
speed

User
setting
IFAN
speed

User
setting
IFAN
speed

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

ON(3*)

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

OFF

Backlight(green) OFF ON(3*) OFF

11-12

CONTROL SYSTEM

Revision Y05-02 Service Manual - ECF DCI

11.11.3 Indoor Unit Controller Controls and Indicators for Floor/Ceiling

Model

STANDBY
INDICATOR

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

OPERATE
INDICATOR

(4)

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).

TIMER
INDICATOR

Lights up during Timer and Sleep operation.

FILTER
INDICATOR

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

2. Blinks during Water Over Flow in PXD models. (Cf. Sect. 7.3)
COOLING
INDICATOR

Lights up when system is switched to Cool Mode by using the Mode

Switch on the unit.
HEATING
INDICATOR

Lights up when system is switched Heat Mode by using the Mode

Switch on the unit.
FAN MODE
INDICATOR

(4)

Lights up in Fan Mode activated by local switches.

FAN SPEED
INDICATORS

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.
TEMP.
SETTING
INDICATORS

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.
FAN SPEED
BUTTON

Press this button to change the speed of the IFAN. Each pressing

change the speed in the sequence of:

..... L → M → H → Auto → L → ...

TEMP.
SETTING UP
BUTTON

Pressing this button increases the SPT by 1

o

C.

Note: The Max SPT is 30

o

C.

TEMP.
SETTING
DOWN BUTTON

Pressing this button decreases the SPT by 1

o

C.

Note: The Min SPT is 18

o

C.

MODE
BUTTON

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.
POWER
BUTTON

Toggle the unit between OPER & STBY modes.

RESET /
FILTER
BUTTON

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).

11.11.4 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.

11-13

CONTROL SYSTEM

Revision Y05-02Service Manual - ECF DCI

11.1 . Indoor Unit Controller21

11.12 Jumper Setting

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

Self test Jumper – J1

OPERATION

J1

SELF-TEST

1

NORMAL

0

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

Family J5 J4 J3

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

0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1

IDU Model

Jumper Setting

J8 J7 J6 J5 J4 J3
WNG25 000011
WNG35 010011
WNG50 001000
WNG60 011000
WNG80 001001
PXD25 000100
PXD35 010100
PXD50 100100
K25 000111
K35 010111
K50 100111
LS35 010110

For wall mounted units Jumpers j7, j8 can be configured by service. All other jumpers on
the above table are factory default (cannot be changed by service).
For unit types as Cassettes, floor ceiling, and ducted, jumpers are set by a model plug.

11-14

CONTROL SYSTEM

Revision Y05-02 Service Manual - ECF DCI

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

Model selection Jumper – J7, J8

Model J8 J7

A
B
C
D

0 0
0 1
1 0
1 1

J9- Presence Detector/Power Shedding

OPERATION J9

Presence Detector 0
Power Shedding 1

Jumper – J10

OPERATION J10

WNG DCI LCD 0
LED 1

11-15

CONTROL SYSTEM

Revision Y05-02Service Manual - ECF DCI

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

Wall Mounted Models

DCI 25 DCI 35

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

Indoor Fan speeds

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

Cassette Models

K 25 K 35 K 35S K 50

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

NomLoadH 55 69 73 80

11-16

CONTROL SYSTEM

Revision Y05-02 Service Manual - ECF DCI

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

12-1

TROUBLESHOOTING

Revision Y05-02Service Manual -ECF DCI

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

CORRECTIVE ACTION

1 Power supply indicator

(Red LED) does not light
up.

No power supply Check power supply. If power supply

is OK, check display and display
wiring. if OK, replace controller.

2 Unit does not respond to

remote control message

Remote control
message not
reached the indoor
unit

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

3 Unit responds to remote

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

Problem with
display PCB

Replace display PCB.
If still not OK replace controller.

Unit in heat mode
and coil is still not
warm.

Change to cool mode and check.4 Indoor fan does not start
(louvers are opened and
Green LED does light
up)

Problem with PCB
or capacitor

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

5 Indoor fan works when

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

PCB problem Replace controller

6 Compressor does not

start

Electronics control
problem or
protection

Perform diagnostics (See 12.3

below), and follow the actions

described.

7 Compressor stops

during operation and
Green LED remains on

Electronic control
or power supply
problem

Perform diagnostics (See 12.3

below), and follow the actions

described.

12-2

TROUBLESHOOTING

Revision Y05-02 Service Manual - ECF DCI

No SYMPTOM PROBABLE

CAUSE

CORRECTIVE ACTION

8 Compressor is on but

outdoor fan does not
work

Problem with
outdoor electronics
or outdoor fan

Check outdoor fan motor according
to the procedure in section 12.5.3
below, if not OK replace controller

9 Unit works in wrong

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

Electronics or
power connection
to RV

Check RV power connections, if OK,
Check RV operation with direct
230VAC power supply, if OK,
Replace outdoor controller.

10 All components are

operating properly but
no cooling or no heating

Refrigerant leak Check refrigeration system.

11 Compressor is over

heated and unit does not
generate capacity

EEV problem Check EEV

12 Units goes into

protections and
compressor is stopped
with no clear reason

Control problem or
refrigeration
system problem

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

13 Compressor motor is

generating noise and no
suction occurs

Phase order to
compressor is
wrong

Check compressor phase order.

14 Water leakage from

indoor unit

Indoor unit
drainage tube is
blocked

Check and open drainage tube.

15 Freezing of outdoor unit

in heat mode and
outdoor unit base is
blocked with ice

Connect base heater.

16 Unit operates with wrong

fan speeds or wrong
frequency

Wrong umperj

settings

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.

12-3

TROUBLESHOOTING

Revision Y05-02Service Manual - ECF DCI

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

10 Reserved 0 1 0 1 0
11 Outdoor Unit Fault 01011

17 Defrost protection 1 0 0 0 1

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
29

18

8 No Communication 0 1 0 0 0

No Encoder 0 1 0 0 19

... Reserved

30ModelC 11110
31 Model D 1 1111

Model B 1 1 1 0 1

Deicing Protection 1 0 0 1 0

12-4

TROUBLESHOOTING

Revision Y05-02 Service Manual - ECF DCI

12.3.2 Indoor unit diagnosis and corrective actions

No.

Fault

Probable Cause Corrective Action

1

Sensor failures of
all types

Check sensor connections or
replace sensor.

2

Communication
mismatch

Indoor and Outdoor
controllers are with different
Versions.

Replace Indoor controller.

3

No Communication

Communication or grounding
wiring is not good.

Check Indoor to Outdoor
wiring and grounding.

4

No Encoder

Indoor electronics or motor Checkmotorwiring,ifok,.

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

5

Outdoor Unit Fault

Outdoor controller problem Switch to Outdoor.

diagnostics.

6

EEPROM Not
Updated

System is using ROM
parameters and not
EEPROM parameters.

No action, unless special
parameters are required for
unit operation.

7

Bad EEPROM

No action, unless special
parameters are required for
unit operation.

8

Bad
Communication

Communication quality is low
Reliability.

Check Indoor to Outdoor
wiring and grounding.

9

Using EEPROM
data

No problem. System is using
EEPROM parameters.

12-5

TROUBLESHOOTING

Revision Y05-02Service Manual - ECF DCI

No Problem 5 4 3 2 1

1 OCT is disconnected

0 0 0 0 1

2 OCT is shorted

0 0 0 1 0

3 CTT is disconnected

0 0 0 1 1

4 CTT is shorted

0 0 1 0 0

5 HST is disconnected (when enabled)

0 0 1 0 1

6 HST is shorted (when enabled)

0 0 1 1 0

7 OAT is disconnected (when enabled)

0 0 1 1 1

8 OAT is shorted (when enabled)

0 1 0 0 0

9 TSUC is disconnected (when enabled)

0 1 0 0 1

10 TSUC is shorted (when enabled)

0 1 0 1 0

11 IPM Fault

0 1 0 1 1

12 Bad EEPROM

0 1 1 0 0

13 DC under voltage

0 1 1 0 1

14 DC over voltage

0 1 1 1 0

15 AC under voltage

0 1 1 1 1

16 IDU/ODU Communication mismatch

1 0 0 0 0

17 No Comm

unication

1 0 0 0 1

18 Reserved

1 0 0 1 0

20 Heat sink Over Heating

1 0 1 0 0

21 Deicing

1 0 1 0 1

22 Compressor Over Heating

1 0 1 1 0

23 Compressor Over Current

1 0 1 1 1

24 No OFAN Feedback

1 1 0 0 0

25 OFAN locked

1 1 0 0 1

26 Compressor Lock

1 1 0 1 0

27 Bad Communication

1 1 0 1 1

1 - ON, 0 - OFF
Only one code is shown. Order of priorety is 1-24. Diagnostics is continuously ON as long
power is on.

12.3.3 Outdoor Unit Diagnostics

12-6

TROUBLESHOOTING

Revision Y05-02 Service Manual -ECF DCI

12.3.4 Outdoor unit diagnosis and corrective actions

o.

Fault

Probable Cause Corrective Action

Sensors failures of all
types

Check sensors
connections or replace
sensors.

IPM Fault Electronics HW

problem

Check all wiring and
umper settings, if OK,
replace electronics.

Bad EEPROM No action, unless special

parameters are required
for unit operation.

DC under/over Voltage Electronics HW

problem

Check outdoor unit power
supply voltage

AC under Voltage Check outdoor unit power

supply voltage
Indoor / Outdoor unit
Communication
mismatch

Indoor and Outdoor
controllers are with
different versions

Replace Indoor controller

No Communication Communication or

grounding wiring is not
good.

Check Indoor to Outdoor

wiring and grounding

Compressor Lock Switch unit to STBY and

restart
Bad Communication Communication quality is

low reliability

Check Indoor to Outdoor

wiring and grounding

12-7

TROUBLESHOOTING

Revision Y05-02Service Manual -ECF DCI

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.

12-8

TROUBLESHOOTING

Revision Y05-02 Service Manual - ECF DCI

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.

13-1

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y05-02Service Manual - ECF DCI

13. EXPLODED VIEWS AND SPARE PARTS LISTS

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

13-2

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y05-02 Service Manual - ECF DCI

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

（Grill B P/N:372231

）

CASSETTE AUTO LOUVER

13-3

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y05-02Service Manual -ECF DCI

13.3 Indoor Unit: ECF 25, 35 DCI

No. Part No. Name

Total

Quan.

Version

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

Indoor Senso

r BLACK

11
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

ROOM Senso

r RED

11
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

CHASSIS ASSY

11
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

13-4

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y05-02 Service Manual -ECF DCI

13.4 Outdoor Unit: ECF 35S DCI

No. Part No. Name

Total

Quan.

Version

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

Indoor Senso

r BLACK

11
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

ROOM Senso

r RED

11
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

CHASSIS ASSY

11
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

13-5

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y05-02Service Manual - ECF DCI

13.5 Indoor Unit: ECF 50 DCI

No. Part No. Name

Total

Quan.

Version

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

Indoor Senso

r BLACK

11
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

ROOM Senso

r RED

11
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

CHASSIS ASS

Y

11
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

13-6

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y05-02 Service Manual - ECF DCI

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

2

1

345678

42

41

109

24

26

35

ONG3-9,12 DCI R410AONG3-9,12 DCI R410A

40

38

37

33

34

27

28

32

11 12 13 14 15 16 18 1917

22

21

20

39

36

29

30

31

23

25

13-7

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y05-02Service Manual - ECF DCI

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

No. Part No. Description Unit

1 433218

Front panel A

1

2 4526340

Air inlet ring-420

1

3 433223

Painting insulation plate

1

4 4526476

Axial fan OD=401

1

5 4527092

DC motor for DCI25/35

1

6 433215

Motor support

1

7 4523060

Base painting Assy.

1

8 4526299 Partition 1

9 4526403

Outdoor DC inverter controller (English)

1

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

Therminal sheet

1

18 4526220

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

1

19 4526219

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

1

20

204107 Cable clip nylon

1

21

4519188 4 poles terminal block

1

22

433229 Value cover

1

23

4522509 4-Way valve coil

1

24 4526367

4-way valve welding Assy. (DCI25)

1

4526393

4-way valve welding Assy. (DCI35)

1

25

4518952 4-way valve (DCI25)

1

4518951 4-way valve (DCI35)

1

26 4526221

Compressor wire

1

27 4526204

DC Inverter compressor Assy. 5RS102XAB

1

28

4526775 Compressor top thermistor(CTT)

1

29 4526774

Outside air thermistor(OAT)

1

30 4526776

Outside coil thermistor(OCT)

1

31 4526969

Suction coil thermistor(SUCT)

1

32 4526828

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

1

33 4526827

Electronic expansion value (CAMB20YGFKS-1)

1

34 4519606

Right side panel

1

35

433228 Back side net

1

36 4526368

Condenser soldering assy

1

37 4526298

Bridge

1

38 4519614

Painting top cover

1

39 4526480

Gasket for axial fan

1

40

4519300 Nut M5 L

1

41 433225

Handle

1

42 4519607

Left side panel painting plate

1

13-8

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y05-02 Service Manual - ECF DCI

13.8 Outdoor Unit: ECF 50 DCI

13-9

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y05-02Service Manual - ECF DCI

13.9 Outdoor Unit: ECF 50 DCI

No. Part No. Description Unit

1 433218

Front panel A

1

2 4526340

Air inlet ring-420

1

3 433223

Painting insulation plate

1

4 4526476

Axial fan OD=401

1

5 4526475

DC motor for DCI 50

1

6 4526457

Motor support

1

7 4527363

Base painting Assy.

1
8 4526459 Partition 1
9 4526203

Outdoor DC inverter controller (English)

1

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

Therminal sheet

1

18 4526220

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

1

19 4526533

Fuse 65TS(20A,230)150-031-00

1

20

204107 Cable clip nylon

1

21

4519188 4 poles terminal block

1

22

433229 Value cover

1

23

4522509 4-Way valve coil

1

24 4527327

4-way valve welding Assy.

1

25 4518952 4-way valve 1
26 4526221

Compressor wire

1

27 4523446

DC Inverter compressor Assy. 5CS130XCC03

1

28

4526775 Compressor top thermistor(CTT)

1

29 4526774

Outside air thermistor(OAT)

1

30 4526776

Outside coil thermistor(OCT)

1

31 4526969

Suction coil thermistor(SUCT)

1

32 4526215

Electronic expansion valve ZDPF(L)-1.6C-01-RK for R410A

1

33 4526216

EEV COIL QA(L)12-HR-01A-RK

1

34 4519606

Right side panel

1

35

433228 Back side net

1

36 4526459

Condenser soldering assy

1

37 4526298

Bridge

1

38 4519614

Painting top cover

1

39 4526480

Gasket for axial fan

1

40

4519300 Nut M5 L

1

41 433225

Handle

1

42 4519607

Left side panel painting plate

1

1 bis,Avenue du 8 Mai 1945
Saint-Quentin-en-Yvelines
78284 GUYANCOURT Cedex

FRANCEFRANCE

FRANCEFRANCE

FRANCE

: :

: :

:

1 bis,Avenue du 8 Mai 1945 - Saint-Quentin-en-Yvelines - 78284 - GUYANCOURT Cedex - Tél. [phone] - Fax [phone]

With a concern for a constant improvement, our products can be modified without notice. Photos non contractual.