Electra delta 22, delta 25, delta 35, delta 50 Service Manual

Delta DCI Series

CONTENT

Indoor Units Outdoor Units

Delta 22 DCR 22

Delta 25 DCR 25

Delta 35 DCR 35
Delta 50 DCR 50

SM DELTA 1-E.2 GB

REFRIGERANT

REFRIGERANT

R410A

HEAT PUMP

SEPTEMBER – 2008

LIST OF EFFECTIVE PAGES

CONTENT

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 ........ 15 March 2005

Total number of pages in this publication is 79 consisting of the following:

Page
No.

Title ....................... 2

A ........................... 2

i ............................. 2

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

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

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

4-1 - 4-3 ................ 2

5-1 - 5-20 .............. 2

6-1 - 6-4 ................ 2

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

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

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

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

11-1-11-14 ............. 2

12-1-12-7 .............. 2

13-1-13-11 ............ 2

Appendix -A ...........2

Revision
No. #

Page
No.

Revision
No. #

Page
No.

Revision
No. #

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

A

• Zero in this column indicates an original page.

SM DELTA 1-E.2 GB

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 & PRESSURE CURVES ...............................................5-1

6. SOUND LEVEL CHARACTERISTICS ..................................................................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 .........................................................................................................14-1

SM DELTA 1-E.2 GB

i

1. INTRODUCTION

CONTENT

1.1 General

The new Delta DC Inverter split wall mounted series comprise RC (heat pump)
models, as follows:

● Delta 22

● Delta 25

● Delta 35

● Delta 50

The indoor Delta units are available as LED display types only, featuring esthetic
design, compact dimensions, and low noise operation.

INTRODUCTION

1.2 Main Features

The Delta series benefits from the most advanced innovations, namely:

●

DC Inverter Technology

● R410A

● Microprocessor control.

● Infrared remote control with liquid crystal display.

● Indoor large diameter cross flow fan, allowing low noise level operation.

● Bended indoor coil with treated aluminum fins and coating for improved
efficiency.

● High COP.

● Pre-Charged units up to the max allowing tubing distance.

● Heating operation at outdoor temperature down to -15ºC

● Advanced test and diagnostics mode.

● M2L diagnostics softwear cable port (for PC)

● Easy access to the interconnecting tubing and wiring connections, so that
during installation removing the front grill or casing is not necessary.

SM DELTA 1-E.2 GB

● Refrigerant pipes can be connected to the indoor unit from 5 different optional
directions.

● Automatic treated air sweep.

● Easy installation and service.

1-1

INTRODUCTION

CONTENT

1.3 Indoor Unit

The indoor unit is wall mounted, and can be easily fitted to many types of residential
and commercials applications.

It includes:

● Casing with air inlet and outlet grills.

● A large-diameter tangential fan.

● Bended coil with treated aluminum fins.

● Motorized flaps.

● Variable Speed motor (PG).

● Advanced electronic control box assembly.

● Interconnecting wiring terminal block.

● Mounting plate

.

1.4 Filtration

The Delta series presents several types of air filters:

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

● Pre-charged electrostatic filter (optional)

● Active carbon filter (optional)

1.5 Control

The microprocessor indoor controller, and an infrared remote control, supplied as
standard, provide complete operating function and programming. For further details
please refer to the Operation Manual, Appendix A.

1.6 Outdoor Unit

The Delta 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.

1-2

It includes :

● Single DC Rotary Compressor mounted in a soundproofed compartment

● Axial fan.

● Outdoor coil with hydrophilic louver fins.

● Outlet air fan grill.

● Outdoor advanced controller.

● 2 fan speed AC motor

SM DELTA 1-E.2 GB

1.7 Tubing Connections

CONTENT

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

1.8 Inbox Documentation

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

1.9 Matching Table

OUTDOOR UNITS

INTRODUCTION

INDOOR UNITS

MODEL REFR” Delta 22 Delta 25 Delta 35 Delta 50

DCR 22
DCR 25
DCR 35

DCR 50 R410A

R410A

√√√

―――

―

√

SM DELTA 1-E.2 GB

1-3

PRODUCT DATA SHEET

CONTENT

2. PRODUCT DATA SHEET

2.1 Delta 22 / DCR 22 DCI R410A

Model Indoor Unit DELTA 22 DCI
Model Outdoor Unit DCR 22 R410A

Installation Method of Pipe

Characteristics Units Cooling Heating

Capacity

Power input

EER (Cooling) or COP(Heating)

Energy efficiency class A B

Power supply V/Ph/Hz 220-240V/Single/50Hz

Rated current A 3.0 3.3

Starting current A 10.5

Circuit breaker rating A 10

Operation control type Remote control

Heating elements kW
Others

(1)

(1)

(1)

Fan type & quantity Crossflow x 1

Fan speeds H/M/L RPM 1100/950/800

(2)

Air flow

External static pressure Min-Max Pa 0

Sound power level

Sound pressure level

Moisture removal l/hr 1

Condensate drain tube I.D mm 16

INDOOR

Dimensions WxHxD mm 680x250x185

Weight kg 7

Package dimensions WxHxD mm 740x265x320

Packaged weight kg 10

Units per pallet units 36 units per pallet

Stacking height units 9 levels

Refrigerant control EEV

Compressor type, model Rotary, Panasonic 5RS092XDJ01

Fan type & quantity Propeller(direct) x 1

Fan speeds H/L RPM 770

Air flow H/L m3/hr 1400

Sound power level H/L dB(A) 64

Sound pressure level

Dimensions WxHxD mm 760x245x545

Weight kg 35

Package dimensions WxHxD mm 880x310x610

Packaged weight kg 38

OUTDOOR

Units per pallet Units 12 units per pallet

Stacking height units 3 levels

Refrigerant type R410A

Refrigerant chargless distance kg/m 0.7kg/7.5m

Additional charge per 1 meter g/m No need

Connections between

units

(3)

(4)

(4)

Liquid line In.(mm) 1/4”(6.35)

Suction line In.(mm) 3/8”(9.53)

Max.tubing length m. Max.15

Max.height difference m. Max. 10

H/M/L m3/hr 400/350/300

H/M/L dB(A) 49/46/43

H/M/L dB(A) 36/33/30

H/L dB(A) 54

Btu/hr 7500(4440-8870) 8530(4440-10580)

kW 2.2(1.3-2.6) 2.5(1.3-3.1)

kW 0.66 0.73

W/W 3.33 3.42

Flared

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

SM DELTA 1-E.2 GB

2-1

PRODUCT DATA SHEET

CONTENT

2.2 Delta 25 / DCR 25 DCI R410A

Model Indoor Unit DE LTA 25
Model Outdoor Unit DCR 25
Installation Method of Pipe Flared

Characteristics Units Cooling Heating

Capacity

Power input
EER (Cooling) or COP(Heating)
Energy efficiency class A B
Power supply V/Ph/Hz 220-240V/Single/50Hz
Rated current A 3.2 3.6
Starting current A 10
Circuit breaker rating A 12

Operation control type Remote control
Heating elements kW
Others

(1)

(1)

(1)

Fan type & quantity Crossflow x 1
Fan speeds H/M/L RPM 1200/1050/850

(2)

Air flow
External static pressure Min-Max Pa 0

Sound power level
Sound pressure level
Moisture removal l/hr 1
Condensate drain tube I.D mm 16

INDOOR

Dimensions WxHxD mm 680x250x185
Weight kg 7
Package dimensions WxHxD mm 740x265x320
Packaged weight kg 10
Units per pallet units 36 units per pallet
Stacking height units 9 levels
Refrigerant control EEV
Compressor type, model Rotary, Panasonic 5RS092XDJ01
Fan type & quantity Propeller(direct) x 1
Fan speeds H/L RPM 760
Air flow H/L m3/hr 1390
Sound power level H/L dB(A) 64

Sound pressure level
Dimensions WxHxD mm 760x245x545
Weight kg 36
Package dimensions WxHxD mm 880x310x610
Packaged weight kg 39
Units per pallet Units 12 units per pallet

OUTDOOR

Stacking height units 3 levels
Refrigerant type R410A
Refrigerant chargless distance kg/m 0.85kg/7.5m
Additional charge per 1 meter g/m No need

Connections between

units

(3)

(4)

(4)

Liquid line In.(mm) 1/4”(6.35)
Suction line In.(mm) 3/8”(9.53)
Max.tubing length m. Max.15

Max.height
difference

H/M/L m3/hr 420/350/270

H/M/L dB(A) 52/48/45
H/M/L dB(A) 39/35/32

H/L dB(A) 54

Btu/hr 8530(4440-10240) 9550(4774-11940)

kW 2.5(1.3-3.0) 2.8(1.4-3.5)
kW 0.75 0.82

W/W 3.33 3.41

m. Max. 10

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

SM DELTA 1-E.2 GB

PRODUCT DATA SHEET

CONTENT

2.3 Delta 35 / DCR 35 DCI R410A

Model Indoor Unit DE LTA 35
Model Outdoor Unit DCR 35
Installation Method of Pipe Flared

Characteristics Units Cooling Heating

Capacity

Power input
EER (Cooling) or COP(Heating)
Energy efficiency class A B
Power supply V/Ph/Hz 220-240V/Single/50Hz
Rated current A 4.9 4.8
Starting current A 10.5
Circuit breaker rating A 15

Operation control type Remote control
Heating elements kW No
Others

(1)

(1)

(1)

Fan type & quantity Crossflow x 1
Fan speeds H/M/L RPM 1200/1000/850

(2)

Air flow
External static pressure Min-Max Pa 0

Sound power level
Sound pressure leve
Moisture removal l/hr 1.5
Condensate drain tube I.D mm 16

INDOOR

Dimensions WxHxD mm 840x250x185
Weight kg 8
Package dimensions WxHxD mm 930x265x320
Packaged weight kg 11
Units per pallet units 36 units per pallet
Stacking height units 9 levels
Refrigerant control EEV
Compressor type, model Rotary, Panasonic 5RS102XAB
Fan type & quantity Propeller(direct) x 1
Fan speeds H/L RPM 760
Air flow H/L m3/hr 1390
Sound power level H/L dB(A) 65

Sound pressure level
Dimensions WxHxD mm 760x245x545
Weight kg 37
Package dimensions WxHxD mm 880x310x610
Packaged weight kg 40
Units per pallet Units 12 units per pallet

OUTDOOR

Stacking height units 3 levels
Refrigerant type R410A
Refrigerant chargless distance kg/m 1.0kg/7.5m
Additional charge per 1 meter g/m No need

Connections between units

(3)

(4)

l

(4)

Liquid line In.(mm) 1/4”(6.35)
Suction line In.(mm) 3/8”(9.53)
Max.tubing length m. Max.15

Max.height
difference

H/M/L m3/hr 550/450/350

H/M/L dB(A) 56/46/42
H/M/L dB(A) 39/33/29

H/L dB(A) 55

Btu/hr 11940(4440-13990) 12280(5115-13990)

kW 3.5(1.3-4.1) 3.6(1.65-4.1)
kW 1.03 1.05

W/W 3.39 3.43

m. Max. 10

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

SM DELTA 1-E.2 GB

2-3

PRODUCT DATA SHEET

CONTENT

2.4 Delta 50 / DCR 50 DCI R410A

Model Indoor Unit DELTA 50 DCI
Model Outdoor Unit DCR 50 R410A

Installation Method of Pipe Flared

Characteristics Units Cooling Heating

Capacity

Power input

EER (Cooling) or COP(Heating)

Energy efficiency class A B

Power supply V/Ph/Hz 220-240V/Single/50Hz

Rated current A 7.0 6.9

Starting current A 10.5

Circuit breaker rating A 20

Operation control type Remote control

Heating elements kW

Others

(1)

(1)

kW 1.56 1.55

Fan type & quantity Crossflow x 1

Fan speeds H/M/L RPM 1230/1100/900

(2)

Air flow

External static pressure Min-Max Pa

Sound power level

Sound pressure level

Moisture removal l/hr 2

Condensate drain tube I.D mm 16

INDOOR

Dimensions WxHxD mm 900x205x295

Weight kg

Package dimensions WxHxD mm 960x270x360

Packaged weight kg 14

Units per pallet units 24 units per pallet

Stacking height units 8 levels

Refrigerant control EEV

Compressor type, model Scroll, PANASONIC 5CS130XCC03

Fan type & quantity Propeller(direct) x 1

Fan speeds H/L RPM 920

Air flow H/L m3/hr 2160

Sound power level H/L dB(A) 63

Sound pressure level

Dimensions WxHxD mm 795x290x610

Weight kg 38

Package dimensions WxHxD mm 945x395x655

Packaged weight kg 41

OUTDOOR

Units per pallet Units 9 units per pallet

Stacking height units 3 levels

Refrigerant type R410A

Refrigerant chargless distance kg/m 1.26kg/7.5m

Additional charge per 1 meter g/m No need

H/M/L m3/hr 720/620/480

Connections between

units

(1)

W/W 3.21 3.42

(3)

H/M/L dB(A) 56/54/47

(4)

H/M/L dB(A) 44/41/34

(4)

H/L dB(A) 53

Liquid line In.(mm) 1/4"(6.35)

Suction line In.(mm) 1/2"(12.7)

Max.tubing length m. Max.15

Max.height difference m. Max. 10

Btu/hr 17060(4780-18770) 18080(5460-20130)

kW 5.0(1.4-5.5) 5.3(1.6-5.9)

0

11

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

2-4

SM DELTA 1-E.2 GB

3. RATING CONDITIONS

CONTENT

Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units).

Cooling:

Indoor: 27oC DB 19oC WB
Outdoor: 35 oC DB

Heating:

Indoor: 20oC DB
Outdoor: 7oC DB 6oC WB

3.1 Operating Limits

3.1.1 R410A

Cooling

Upper limit
Lower limit

32oC DB 23oC WB 46oC DB

21oC DB 15oC WB 10oC DB

RATING CONDITIONS

Indoor Outdoor

Heating

Upper limit
Lower limit

Voltage

27oC DB 24oC DB 18oC WB

10oC DB -15oC DB -16oC WB

198 – 264 V

SM DELTA 1-E.2 GB

3-1

4. OUTLINE DIMENSIONS

CONTENT

4.1 Indoor Unit: Delta 22, 25 DCI

OUTLINE DIMENSIONS

4.2

Indoor Unit: Delta 35 DCI

SM DELTA 1-E.2 GB

4-1

OUTLINE DIMENSIONS

CONTENT

4.3 Indoor Unit: Delta 50 DCI

4.4 Outdoor Unit: DCR 22, 25, 35 DCI

AIR INTAKE

4-2

AIR OUTLET

SM DELTA 1-E.2 GB

4.5 Outdoor Unit: DCR 50 DCI

CONTENT

OUTLINE DIMENSIONS

SM DELTA 1-E.2 GB

4-3

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5. PERFORMANCE DATA

5.1 Delta 22 DCI

5.1.1 Cooling Capacity (kW) – Run Mode

230[V] : Indoor Fan at High Speed.

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 2.12 2.26 2.40 2.54 2.68
SC 1.62 1.65 1.69 1.72 1.75

PI 0.52 0.53 0.54 0.55 0.56
TC 2.02 2.16 2.30 2.44 2.58
SC 1.58 1.61 1.65 1.68 1.71

PI 0.58 0.59
TC 1.92 2.06

0.60

2.20

0.61 0.62

2.34 2.48

SC 1.54 1.58 1.61 1.64 1.68

PI 0.64 0.65
TC 1.82 1.96

0.66

2.10

0.67 0.68

2.24 2.38

SC 1.50 1.54 1.57 1.60 1.64

PI 0.70 0.71 0.72 0.73 0.74
TC 1.70 1.84 1.98 2.12 2.26
SC 1.46 1.49 1.52 1.56 1.59

PI 0.77 0.78 0.79 0.80 0.81

LEGEND

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

o

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

o

C)

C)
ID – Indoor
OD – Outdoor

5.1.2 Capacity Correction Factors

Coo ling Capacity R atio Vs. Outdoor Temp erature

1.20

1.10

1.00

0.90

0.80

0.70

Capacity Ratio

0.60

0.50
20 25 30 35 40 45

Outdoor Temperature [deg C]

SM DELTA 1-E.2 GB

5-1

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.1.3 Heating Capacity (kW) - Run Mode
230[V] : Indoor Fan at High Speed.

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 1.59 1.48 1.37

PI 0.44 0.48 0.53

TC 1.77 1.66 1.55

PI 0.53 0.57 0.62

TC 1.91 1.80 1.68

PI 0.60 0.64 0.68

TC 1.97 1.86 1.75

PI 0.63 0.67 0.72

TC 2.02 1.91 1.80

PI 0.65

TC 2.61

PI 0.69

TC 2.75

PI 0.73 0.77 0.82

TC 2.90 2.79 2.68

PI 0.77 0.81 0.86

TC 85 - 105 % of nominal

PI 80 - 120 % of nominal

0.70

2.50

0.73

2.64

0.74

2.39

0.77

2.53

LEGEND

TC – Total Heating Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OU – Outdoor

5.1.4 Capacity Correction Factors

Heating C apacity Ratio V s. Outdoor Temperature

1.20

1.10

1.00

0.90

0.80

0.70

Capacit y Ration

0.60

0.50

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [deg C]

5-2

SM DELTA 1-E.2 GB

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.2 Delta 25 DCI

5.2.1 Cooling Capacity (kW) – Run Mode
230[V] : Indoor Fan at High Speed.

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 2.41 2.57 2.73 2.89 3.05

SC 1.67 1.71 1.74 1.77 1.81

PI 0.59 0.60 0.61 0.62 0.63

TC 2.30 2.46 2.62 2.77 2.93

SC 1.63 1.67 1.70 1.73 1.77

PI 0.66 0.67

TC 2.18 2.34

0.68

2.50

0.69 0.70

2.66 2.82

SC 1.59 1.63 1.66 1.69 1.73

PI 0.73 0.74

TC 2.07 2.23

0.75

2.39

0.76 0.77

2.54 2.70

SC 1.55 1.59 1.62 1.65 1.69

PI 0.80 0.81 0.82 0.83 0.84

TC 1.93 2.09 2.25 2.41 2.56

SC 1.50 1.54 1.57 1.61 1.64

PI 0.88 0.89 0.90 0.91 0.92

LEGEND

TC – Total Cooling Capacity, kW
SC – Sensible Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OD – Outdoor

5.2.2 Capacity Correction Factors

Coo ling Capacity R atio Vs. Outdoor Temp erature

1.20

1.10

1.00

0.90

0.80

0.70

Capacity Ratio

0.60

0.50
20 25 30 35 40 45

Outdoor Temperature [deg C]

SM DELTA 1-E.2 GB

5-3

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.2.3 Heating Capacity (kW) - Run Mode
230[V] : Indoor Fan at High Speed.

ID COIL ENTERING AIR DB TEMPERATURE [oC]

OD COIL

ENTERING

AIR DB/WB

TEMPERATURE

[oC]

DATA 15 20 25

-15/-16

-10/-12

-7/-8

-1/-2

2/1

7/6

10/9

15/12

15-24

(Protection Range)

TC 1.78 1.66 1.53

PI 0.49 0.54 0.59

TC 1.98 1.86 1.73

PI 0.59 0.64 0.69

TC 2.14 2.01 1.89

PI 0.67 0.72 0.77

TC 2.21 2.09 1.96

PI 0.71 0.76 0.81

TC 2.26 2.14 2.01

PI 0.73

TC 2.92

PI 0.77

TC 3.09

PI 0.82 0.87 0.92

TC 3.25 3.12 3.00

PI 0.86 0.91 0.96

TC 85 - 105 % of nominal

PI 80 - 120 % of nominal

LEGEND

TC – Total Heating Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OU – Outdoor

0.78

2.80

0.82

2.96

0.83

2.68

0.87

2.84

5.2.4 Capacity Correction Factors

5-4

Heating C apacity Ratio V s. Outdoor Temperature

1.20

1.10

1.00

0.90

0.80

0.70

Capacit y Ration

0.60

0.50

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [deg C]

SM DELTA 1-E.2 GB

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.3 Delta 35 DCI

5.3.1 Cooling Capacity (kW) - Run Mode
230[V] : Indoor Fan at High Speed.

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 3.82 4.04 4.26
SC 2.54 2.59 2.64 2.69 2.74

PI 0.81 0.83 0.84 0.86 0.87
TC 3.22 3.44 3.66 3.88 4.10
SC 2.48 2.53 2.58 2.63 2.68

PI 0.90 0.92
TC 3.06 3.28

0.94

3.50

0.95 0.97

3.72 3.94

SC 2.42 2.47 2.52 2.57 2.62

PI 1.00 1.01
TC 2.90 3.12

1.03

3.34

1.05 1.06

3.56 3.78

SC 2.36 2.41 2.46 2.51 2.56

PI 1.09 1.11 1.12 1.14 1.16
TC 2.70 2.92 3.15 3.37 3.59
SC 2.28 2.34 2.39 2.44 2.49

PI 1.21 1.22 1.24 1.25 1.27

LEGEND

TC – Total Cooling Capacity, kW
SC – Sensible Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OD – Outdoor

5.3.2 Capacity Correction Factors

Coo ling Capacity R atio Vs. Outdoor Temp erature

1.20

1.10

1.00

0.90

0.80

0.70

Capacity Ratio

0.60

0.50
20 25 30 35 40 45

Outdoor Temperature [deg C]

SM DELTA 1-E.2 GB

5-5

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.3.3 Heating Capacity (kW) - Run Mode
230[V] : Indoor Fan at High Speed.

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

DATA 15 20 25

TC 2.29 2.13 1.97

PI 0.63 0.69 0.76

TC 2.55 2.39 2.23

PI 0.76 0.82 0.89

TC 2.75 2.58 2.42

PI 0.86 0.92 0.98

TC 2.84 2.68 2.52

PI 0.91 0.97 1.03

TC 2.91 2.75 2.59

PI 0.94

TC 3.76

PI 0.99

TC 3.97

PI 1.04 1.11 1.17

TC 4.17 4.01 3.85

PI 1.10 1.17 1.23

TC 85 - 105 % of nominal

1.00

3.60

1.05

3.81

1.07

3.44

1.11

3.65

(Protection Range)

PI 80 - 120 % of nominal

LEGEND

TC – Total Heating Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OU – Outdoor

5.3.4 Capacity Correction Factors

Heating C apacity Ratio V s. Outdoor Temperature

1.20

1.10

1.00

0.90

0.80

0.70

Capacit y Ration

0.60

0.50

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [deg C]

5-6

SM DELTA 1-E.2 GB

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.4 Delta 50 DCI

5.4.1 Cooling Capacity (kW) – Run Mode
230[V] : Indoor Fan at High Speed.

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 4.93 5.22 5.51 5.80 6.09
SC 3.68 3.73 3.79 3.84 3.90

PI 1.18 1.21 1.23 1.26 1.29
TC 4.67 4.96 5.25 5.54 5.83
SC 3.53 3.59 3.64 3.70 3.75

PI 1.34 1.37
TC 4.42 4.71

1.40

5.00

1.42 1.45

5.29 5.58

SC 3.39 3.45 3.50 3.55 3.61

PI 1.51 1.53
TC 4.17 4.46

1.56

4.75

1.59 1.61

5.04 5.33

SC 3.25 3.30 3.36 3.41 3.47

PI 1.67 1.70 1.72 1.75 1.78
TC 3.86 4.15 4.44 4.73 5.02
SC 3.08 3.13 3.18 3.24 3.29

PI 1.87 1.89 1.92 1.95 1.97

LEGEND

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

o

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

o

C)

C)
ID – Indoor
OD – Outdoor

5.4.2 Capacity Correction Factors

Coo ling Capacity R atio Vs. Outdoor Temp erature

1.20

1.10

1.00

0.90

0.80

0.70

Capacity Ratio

0.60

0.50
20 25 30 35 40 45

Outdoor Temperature [deg C]

SM DELTA 1-E.2 GB

5-7

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.4.3 Heating Capacity (kW) - Run Mode
230[V] : Indoor Fan at High Speed.

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

DATA 15 20 25

TC 3.37 3.14 2.90

PI 0.93 1.02 1.12

TC 3.76 3.52 3.28

PI 1.12 1.22 1.31

TC 4.04 3.81 3.57

PI 1.26 1.36 1.45

TC 4.18 3.95 3.71

PI 1.34 1.43 1.53

TC 4.28 4.04 3.81

PI 1.38

TC 5.54

PI 1.46

TC 5.84

PI 1.54 1.64 1.73

TC 6.14 5.91 5.67

PI 1.63 1.72 1.82

TC 85 - 105 % of nominal

1.48

5.30

1.55

5.60

1.57

5.06

1.64

5.37

(Protection Range)

PI 80 - 120 % of nominal

LEGEND

TC – Total Heating Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OU – Outdoor

5.4.4 Capacity Correction Factors

1.20

1.10

1.00

0.90

0.80

0.70

Capacit y Ration

0.60

0.50

Heating C apacity Ratio V s. Outdoor Temperature

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [deg C]

5-8

SM DELTA 1-E.2 GB

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.5 Capacity Correction Factor Due to Tubing Length

5.5.1 Delta 22 DCI : Cooling

1.01

1.00

0.99

0.98

0.97

0.96

0.95

Capacity Ratio

0.94

0.93
3579111315

Tubing Length[m]

5.5.2 Heating

1.01

1.00

0.99

0.98

0.97

0.96

0.95

Capacity Ratio

0.94

0.93

0.92

3579111315

Tubing Length[m]

SM DELTA 1-E.2 GB

5-9

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.5.3 Delta 25 DCI : Cooling

1.01

1.00

0.99

0.98

0.97

0.96

0.95

0.94

0.93

Capacity Ratio

0.92

0.91

0.90
3 5 7 9 11 13 15

Tubing Length[m]

5.5.4 Heating

1.02

1.00

0.98

0.96

0.94

0.92

0.90

Capacity Ratio

0.88

0.86

0.84
3579111315

Tubing Length[m]

5-10

SM DELTA 1-E.2 GB

5.5.5 Delta 35 DCI : Cooling

CONTENT

1.01

1.00

0.99

0.98

0.97

0.96

Capacity Ratio

0.95

0.94
3579111315

PERFORMANCE DATA & PRESSURE CURVES

Tubing Length[m]

5.5.6 Heating

1.005

1.000

0.995

0.990

0.985

0.980

Capacity Ratio

0.975

0.970
3579111315

Tubing Length[m]

SM DELTA 1-E.2 GB

5-11

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.5.7 Delta 50 DCI : Cooling

1.01

1.00

0.99

0.98

0.97

0.96

Capacity Ratio

0.95

0.94
3 5 7 9 11 13 15

Tubing Length[m]

5.5.8 Heating

1.005

1.000

0.995

0.990

0.985

0.980

Capacity Ratio

0.975

0.970

3579111315

Tubing Length[m]

5-12

SM DELTA 1-E.2 GB

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.6 Pressure Curves

5.6.1 Model: Delta 22 DCI Cooling – Test Mode

Suction Pressure VS.Outdoor Temp.

1200

1100

1000

900

800

700

Suction Pressure [kPa]

600

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

Discharge Pressure VS. Outdoor Temp.

4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500

Discharge Pressure [kPa]

1250

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

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

22/15 DB /WB

24/17 DB /WB

27/19 DB /WB
29/21 DB /WB

32/23 DB /WB

SM DELTA 1-E.2 GB

5-13

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.6.2 Heating – Test Mode

Suction Pressure VS. Outdoor Temp.

1000

900

800

700

600

500

400

Suction Pressure [kPa]

300

-15 -10 -5 0 5 10 15

Outdoor WB Temperature[ºC]

15 DB

20 DB

25 DB

Discharge Pressure VS. Outdoor Temp.

3500
3250
3000
2750
2500
2250
2000
1750
1500

Discharge Pressure [kPa]

1250

-15 -10 -5 0 5 10 15

15 DB

20 DB

25 DB

Outdoor WB Temperature[ºC]

5-14

SM DELTA 1-E.2 GB

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.6.3 Model: Delta 25 DCI Cooling – Test Mode

Suction Pressure VS.Outdoor Temp.

1100

1000

900

800

700

600

Suction Pressure [kPa]

500

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

22/15 D B/WB
24/17 D B/WB
27/19 D B/WB
29/21 D B/WB
32/23 D B/WB

Discharge Pressure VS. Outdoor Temp.

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

Discharge Pressure [kPa]

1000

22/15 D B/WB

24/17 D B/WB
27/19 D B/WB

29/21 D B/WB
32/23 D B/WB

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

SM DELTA 1-E.2 GB

5-15

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.6.4 Heating – Test Mode

Suction Pressure VS. Outdoor Temp.

1000

900

800

700

600

500

400

Suction Pressure [kPa]

300

-15 -10 -5 0 5 10 15
Outdoor WB Temperature [ºC]

15 DB

20 DB

25 DB

Discharge Pressure [kPa]

Discharge Pressure VS. Outdoor Temp.

4000
3750
3500
3250
3000
2750
2500
2250
2000
1750
1500

-15 -10 -5 0 5 10 15

Outdoor WB Temperature [ºC]

15 DB

20 DB

25 DB

5-16

SM DELTA 1-E.2 GB

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.6.5 Model: Delta 35 DCI Cooling – Test Mode

Suction Pressure VS. Outdoor Temp.

1200
1100
1000

900
800
700
600
500

Suction Pressure [kPa]

400

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

22/15 D B/WB
24/17 D B/WB
27/19 D B/WB
29/21 D B/WB
32/23 D B/WB

Discharge Pressure VS. Outdoor Temp.

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

Discharge Pressure [kPa]

1000

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

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

SM DELTA 1-E.2 GB

5-17

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.6.6 Heating – Test Mode

Suction Pressure VS. Outdoor Temp.

1000

900
800
700
600
500
400

Suction Pressure [kPa]

300

-15 -10 -5 0 5 10 15
Outdoor WB Temperature [ºC]

15 DB

20 DB

25 DB

Discharge Pressure VS. Outdoor Temp.

4000
3750
3500
3250
3000
2750
2500
2250
2000

Discharge Pressure [kPa]

1750
1500

-15 -10 -5 0 5 10 15
Outdoor WB Temperature[ºC]

15 DB

20 DB

25 DB

5-18

SM DELTA 1-E.2 GB

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.6.7 Model: Delta 50 DCI Cooling – Test Mode

Suction Pressure VS. Outdoor Temp.

1200

1100

1000

900

800

700

600

500

Suction Pressure [kPa]

400

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

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

Discharge Pressure VS. Outdoor Temp.

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

Discharge Pressure [kPa]

1000

10 15 20 25 30 35 40 45

Outdoor DB Temperature [ºC]

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

SM DELTA 1-E.2 GB

5-19

PERFORMANCE DATA & PRESSURE CURVES

CONTENT

5.6.8 Heating – Test Mode

Suction Pressure VS. Outdoor Temp.

1000

900
800
700
600
500
400

Suction Pressure [kPa]

300

-15 -10 -5 0 5 10 15
Outdoor WB Temperature [ºC]

15 DB

20 DB

25 DB

Discharge Pressure VS. Outdoor Temp.

4000
3750
3500
3250
3000
2750
2500
2250
2000

Discharge Pressure [kPa]

1750
1500

-15 -10 -5 0 5 10 15
Outdoor WB Temperature[ºC]

15 DB

20 DB

25 DB

5-20

SM DELTA 1-E.2 GB

SOUND LEVEL CHARACTERISTICS

CONTENT

6. SOUND LEVEL CHARACTERISTICS

6.1 Sound Pressure Level

Figure 1. Wall Mounted Figure 2. Floor Mounted

Figure 3. Ducted Figure 4. Cassette

6.2 Soud Pressure Level Spectrum (Measured as Figure 1)

Delta 22 Delta 25

-70NC

-60NC

MICRO AR0. 02 dB re , OCT VE BAN S UN PRES URE L VEL

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

-50NC

-40NC

-30NC

-20NC

VE BAN S UN PRES URE L VEL

MICRO AR0. 02 dB re , OCT

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

-70NC

-60NC

-50NC

-40NC

-30NC

-20NC

FAN SPEED LINE

SM DELTA 1-E.2 GB

HI

ME

LO

Hz, AND CE TER FREQUENC ES

Hz, AND CE TER FREQUENC ES

6-1

SOUND LEVEL CHARACTERISTICS

CONTENT

Delta 35 Delta 50

-70NC

URE L VEL

-70NC

MICRO AR0. 02 dB re , OCT VE BAN S UN PRES URE L VEL

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

Hz, AND CE TER FREQUENC ES

-60NC

-50NC

-40NC

-30NC

-20NC

02 dB re , OCT VE BAN S UN PRES

MICRO AR0.

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

-60NC

-50NC

-40NC

-30NC

-20NC

Hz, AND CE TER FREQUENC ES

FAN SPEED LINE

6-2

HI

ME

LO

SM DELTA 1-E.2 GB

SOUND LEVEL CHARACTERISTICS

CONTENT

6.3 Outdoor units

Microphone Distance from Unit

6.4 Sound Pressure Level Spectrum (Measured as Figure 5)

DCR 22 Cooling DCR 22 Heating

MICRO AR0. 02 dB re , OCT VE BAN S UN PRES URE L VEL

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

-70NC

-60NC

-50NC

-40NC

-30NC

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

Hz, AND CE TER FREQUENC ES

Hz, AND CE TER FREQUENC ES

-20NC

MICRO AR0. 02 dB re , OCT VE BAN S UN PRES URE L VEL

DCR 25 Cooling DCR 25 Heating

-70NC

-70NC

-60NC

-50NC

-40NC

-30NC

-20NC

-70NC

MICRO AR0. 02 dB re , OCT VE BAN S UN PRES URE L VEL

SM DELTA 1-E.2 GB

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

Hz, AND CE TER FREQUENC ES

-60NC

-50NC

-40NC

-30NC

-20NC

MICRO AR0. 02 dB re , OCT VE BAN SUN PRESURE L VEL

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

-60NC

-50NC

-40NC

-30NC

-20NC

Hz, AND CE TER FREQUENC ES

6-3

SOUND LEVEL CHARACTERISTICS

CONTENT

DCR 35 Cooling DCR 50 Heating

MICRO AR0. 02 dB re , OCT VE BAN S UN PRES URE L VEL

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

-70NC

-60NC

-50NC

-40NC

-30NC

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

Hz, AND CE TER FREQUENC ES

Hz, AND CE TER FREQUENC ES

-20NC
MICRO AR0. 02 dB re , OCT VE BAN S UN PRES URE L VEL

DCR 50 Cooling DCR 50 Heating

-70NC

-70NC

-60NC

-50NC

-40NC

-30NC

-20NC

-70NC

APPROXIMATE
THRESHOLD OF

MICRO AR0. 02 dB re , OCT VE BAN S UN PRES URE L VEL

HEARING FOR
CONTINUOUS
NOISE

Hz, AND CE TER FREQUENC ES

FAN SPEED LINE

HI

ME

LO

-60NC

-50NC

-40NC

-30NC

-20NC

MICRO AR0. 02 dB re , OCT VE BAN S UN PRES URE L VEL

APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

-60NC

-50NC

-40NC

-30NC

-20NC

Hz, AND CE TER FREQUENC ES

6-4

SM DELTA 1-E.2 GB

7. ELECTRICAL DATA

CONTENT

7.1 Single Phase Units

ELECTRICAL DATA

MODEL

Power Supply

Max Current, A 5.2 6.3

Circuit Breaker,A 12 12

Power Supply Wiring No. X
Cross Section mm

Interconnecting Cable RC
Model No. X Cross Section mm

Power Supply

Max Current, A 7.5 10.3

Circuit Breaker,A 15 20

Power Supply Wiring No. X
Cross Section mm

Interconnecting Cable RC
Model No. X Cross Section mm

2

2

MODEL

2

2

Delta 22 Delta 25

To indoor To indoor

1PH,220-240V,50Hz 1PH,220-240V,50Hz

3x1.0 mm

4x1.0 mm

2

2

3x1.0 mm

4x1.0 mm

2

2

Delta 35 Delta 50

To indoor To indoor

1PH,220-240V,50Hz 1PH,220-240V,50Hz

3x1.5 mm

4x1.5 mm

2

2

3x1.5 mm

5x1.5 mm

2

2

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

SM DELTA 1-E.2 GB

7-1

8. WIRING DIAGRAMS

CONTENT

8.1 Delta 22, 25, 35 / DCR 22, 25, 35 DCI

WIRING DIAGRAMS

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SM DELTA 1-E.2 GB

8-1

WIRING DIAGRAMS

CONTENT

8.2 Delta 50 / DCR 50 DCI

6

54

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8-2

SM DELTA 1-E.2 GB

9. REFRIGERATION DIAGRAMS

CONTENT

9.1 Heat Pump Models

9.1.1 Delta 22 / DCR 22 DCI

REFRIGERATION DIAGRAMS

EEV

SM DELTA 1-E.2 GB

EEV

9-1

REFRIGERATION DIAGRAMS

CONTENT

9.1.2 Delta 25, 35 / DCR 25, 35 DCI

EEV

9-2

EEV

SM DELTA 1-E.2 GB

9.1.3 Delta 50 / DCR 50 DCI

CONTENT

REFRIGERATION DIAGRAMS

EEV

SM DELTA 1-E.2 GB

EEV

9-3

10. TUBING CONNECTIONS

CONTENT

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.

SM DELTA 1-E.2 GB

10-1

CONTROL SYSTEM

CONTENT

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 ‘Slave’ and it must supply the required capacity unless it enters into a protection mode
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 (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

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

SM DELTA 1-E.2 GB

11-1

CONTROL SYSTEM

CONTENT

Target frequency limits as a function of outdoor air temperature (OAT):

OAT Range Cool mode limits Heat mode limits

OAT < 6

6 ≤ OAT < 15 MaxFreqAsOAT1H

15 ≤ OAT < 28

28 ≤ OAT No limit

MaxFreqAsOATC

No limit

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.

11.1.8 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.

11-2

SM DELTA 1-E.2 GB

CONTROL SYSTEM

OFAN Stat

CONTENT

11.1.9 Heating Element Control

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

11.1.10 Outdoor Fan Control

• The OFAN motor is an AC type that operates with 2 speeds (Low/High),
controlled by Relays.

• OFAN speed depends on the compressor Target Frequency, and it’s set according to the
following table and graphs.

• OFAN can change its Speed only if it has been working in the current

speed for

at least 35 seconds:

Compressor

Target Frequency

Freq=0

10 ≤ Freq < OFLowFreq Low Low Low Low

OFLowFreq ≤ Freq< OFMedFreq High Low Low Low

OFMedFreq≤ Freq High Low Low High

Notes:

Normal cases

State A at cool / Heat

OFF OFF OFF OFF

When OAT is faulty or disabled OFAN will follow ‘Normal cases’ rules (left column).

e

at Cool Mode

A

B

C

3 Degrees

3 Degrees

7

20

OAT

OFAN Speed

State B
at cool

State C

at cool

OAT>15 oC

at heat

Not e : Pe r i o r i t i e s A>B>C

1. OFLowFreq =

2. OFMedFreq =

OFLowFreqC in cool mode, and OFLowFreqH in heat mode.

OFMedFreqC in cool mode, and OFMedFreqH in heat mode.

The OFAN will be off when the compressor is off.

• An exception for the following rule is when compressor was operating in cool
mode before stopped. In this case OFAN will remain on in low speed for 1
minute.

• Whenever the indoor unit is under indoor coil overheating protection, as long as the
protection status is HzD2, the outdoor fan will change to off. It will be enabled to be back on
when the status of this protection becomes normal.

• Upon receiving night mode signal (ON), through communication, the OFAN will be
operating in LOW speed only in Cool. It will be back to its normal operation when receiving
OFF signal.

SM DELTA 1-E.2 GB

11-3

CONTROL SYSTEM

CONTENT

11.1.1 EEV (electronic Expansion valve) Control

EEV opening is defined as EEV = EEVOL + EEV

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

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

During the first 5 minutes of compressor operation EEVCV = 0.
Once the first 5 minutes are over, the correction value is calculated as follow: EEVCV(n) = EEVCV(n-

1) + EEV

EEV
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.

CTT

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

CTT

CV

11.1.2 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.

11.2 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 adjusted automatically according to the difference
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 adjusted 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 adjusted automatically according to the calculated
NLOAD.

11.4.1 Temperature Compensation

4 degrees are reduced from RT sensor temperature reading (excluding I-Feel mode), to
compensate for temperature difference between high and low areas in the heated room, and due
to coil heat radiation on RT sensor.

11-4

SM DELTA 1-E.2 GB

11.4.2 Indoor Fan Control in Heat Mode

CONTENT

Indoor fan speed depends on the indoor coil temperature:

CONTROL SYSTEM

ICTST

ICTVL ICTT ICTHICTL

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 (ΔT).
Unit will switch from cool to heat when compressor is off for 3 minutes, and ΔT < -3.
Unit will switch from heat to cool when compressor is off for 5 minutes, and ΔT < -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

SM DELTA 1-E.2 GB

ICT Trend

ICT

ICT < -2

-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

Fast

Increasing

SC SC SC SC SC

Increasing No change Decreasing

Fast

Decreasing

11-5

CONTROL SYSTEM

CONTENT

11.7.2 Indoor Coil over Heating Protection

ICT Trend

ICT

ICT > 55
53 < ICT ≤ 55 D1 D1 D2 D2 D2

49 < ICT ≤ 53 SR SR D1 D2 D2

47 < ICT ≤ 49 SR SR SR D1 D2

45 < ICT ≤ 47 Norm Norm SR SR D1

43 < ICT ≤ 45 Norm Norm Norm SR SR
ICT ≤ 43 Normal

Fast

Decreasing

SC SC SC SC SC

Decreasing No Change Increasing

Fast

Increasing

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

P1 Norm SR

P2 D1 SR

P3 D2 D1

Compressor

Temperature Increases

P3

P2

P1

Normal

Else

Stop Compressor SC

11-6

SM DELTA 1-E.2 GB

11.7.4 Compressor over Current Protection

CONTENT

CCR

Stop-Compresor

CCROC4

CONTROL SYSTEM

CCROC3

HzDown1

CCROC2

CCROC1

Normal

HzDown2

Stop-Rise

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

HST

HST > 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

Decreasing No Change Increasing

SC SC SC

HST Trend

11.7.6 Outdoor Coil Deicing Protection

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 just switched to STBY AND OCT < 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.

SM DELTA 1-E.2 GB

11-7

CONTROL SYSTEM

CONTENT

Deicing Protection Procedure

OCT

12

0

Threshold

COMP

RV

OFAN

EEV

ON

HEAT

COOL

ON

OFF

EEVDeicerOpen

Any

T1 T2

max. 12 minutes

DT

T3 T3

T1 =60 seconds, T2 = 36 seconds, T3 = 6 seconds

T1

11-8

SM DELTA 1-E.2 GB

CONTROL SYSTEM

CONTENT

11.8 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 280C

11.9 On Unit Controls and Indicators

The following is schematic drawing for the display:

STBY/OPER

Mode/Reset Button

Timer

Filter

Infra Red Receiver

SM DELTA 1-E.2 GB

11-9

CONTROL SYSTEM

CONTENT

1. Lights up when the Air Conditioner is connected to power and the

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.

mode is STBY.

2. Blinks for 3 seconds, when the system is switched to Heat Mode

by using the Mode/Reset Switch on the unit (the operation

indicator will be off during this blinking time).

1. Lights up during operation mode (except for item in STBY

indicator).

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).

4. Blinks for 3 seconds when the system is switched to Cool Mode

by using the Mode/Reset Switch on the unit.

As long as the filter Led is off, the Mode/Reset button functions as Mode
switch. Once filter Led is on, the Mode/Reset button functions as Reset
switch.
Mode Function:
Every short pressing , the next operation mode is selected, in this order:

MODE / RESET BUTTON

SB → Cool Mode → Heat Mode → SB → …
In long pressing system enters diagnostic mode (refer to diagnostic mode
Sect.)

Reset Function:

For short pressing:

When Filter LED is on, it turns off the filter indicator.

Notes

1. Pressing time is defined as the time between press and release.

2. If pressing time is one second or less – press is considered as short pressing.

3. If pressing time is three seconds or longer – pressing is considered as long pressing. In

between, pressing is undetermined and system will not respond to pressing.

4. For the LED functionality during diagnostics, refer to the diagnostics Sect.

11-10

SM DELTA 1-E.2 GB

CONTROL SYSTEM

CONTENT

11.10 Outdoor Unit Controller Indicators

Unit has three LED’s. SB LED, STATUS LED, FAULT LED.
SB LED is ON when power is ON (230 VAC),
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.

11.11 Test Mode

11.11.1 Entering Test Mode

System can enter Test mode in two ways:

• Automatically when the following conditions exists for 30 minutes continuously:

o Mode = Cool, Set point = 16, Room temperature = 27±1, Outdoor temperature =

35±1

Or

o Mode = Heat, Set point = 30, Room temperature = 20±1, Outdoor temperature =

7±1

• Manually when entering diagnostics with the following settings:

•

o Mode = Cool, Set point = 16
o Mode = Heat, Set point = 30

11.11.2 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.

SM DELTA 1-E.2 GB

11-11

CONTROL SYSTEM

CONTENT

11.12 SW Parameters

11.12.1 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

Parameters for defrost protection:

ICTDef1 ICT to go back to normal 8
ICTDef2 ICT to ‘stop rise’ when ICT decrease 6
ICTDef3 ICT to ‘stop rise’ when ICT is stable 4
ICTDef4 ICT to ‘Hz Down’ when ICT decrease 2
ICTDef5 ICT to ‘Hz Down’ when ICT is stable 0
ICTDef6 ICT to stop compressor -2

Parameters for indoor coil over heating protection:

ICTOH1 ICT to go back to normal 45
ICTOH2 ICT to ‘stop rise’ when ICT increase 48
ICTOH3 ICT to ‘stop rise’ when ICT is stable 52
ICTOH4 ICT to ‘Hz Down’ when ICT increase 55
ICTOH5 ICT to ‘Hz Down’ when ICT is stable 60
ICTOH6 ICT to stop compressor 62

Model Depended Parameters:

Parameter name

NLOAD limits as a function of selected indoor fan speed

MaxNLOADIF1C 40 40 40
MaxNLOADIF2C 55 51 55
MaxNLOADIF3C 120 90 90
MaxNLOADIF4C 127 127 127
MaxNLOADIF5C 127 127 127

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

Nominal Compressor Frequency
NomLoadC 40 51 61
NomLoadH 55 58 62

22 25 35

Indoor Fan speeds

1200 1350 1300

Models

11-12

SM DELTA 1-E.2 GB

11.12.2 Outdoor Units SW Parameters

CONTENT

Parameter Name DCI25 DCI35 DCI 50

Compressor Parameters

MinFreqC 30 35 35

MaxFreqC 52 62 70

MinFreqH 30 35 40

MaxFreqH 60 73 66

Step1Freq 45 45

Step2Freq 55 55

Step3Freq 65 65

Frequency limits as a function of outdoor air temperature

MaxFreqAsOATC 50 60

MaxFreqAsOAT1H 58 60

MaxFreqAsOAT2H 50 50

Compressor Over Heating Protection

CTTOH1 94 94 94

CTTOH2 98 98 98

CTTOH3 102 102 102

CTTOH4 105 105 105

CTTOH5 120 120 120

Compressor Over Current Protection [A]

CCR01 40 40 40

CCR02 42 42 42

CCR03 44 44 44

CCR04 47 47 47

Outdoor Fan Speed (RPM)

OFLOWC 610 600 600
OFMEDC 700 760 760

CONTROL SYSTEM

SM DELTA 1-E.2 GB

11-13

CONTROL SYSTEM

CONTENT

11.12.3 Outdoor Units SW Parameters

Parameter Name DCR22 DCR25 DCR 35 DCR50

Compressor Parameters

MinFreqC 35 35 35 20
MaxFreqC 52 62 70 77
MinFreqH 38 35 40 26
MaxFreqH 67 73 66 79
Step1Freq 40 43 45 60
Step2Freq 50 55 55 70
Step3Freq 63 63 65 80

Frequency limits as a function of outdoor air temperature

MaxFreqAsOATC 44 50 60 64
MaxFreqAsOAT1H 53 58 60 75
MaxFreqAsOAT2H 45 50 50 60

Compressor Over Heating Protection

CTTOH1 94 94 94 94
CTTOH2 98 98 98 98
CTTOH3 102 102 102 102
CTTOH4 105 105 105 105
CTTOH5 120 120 120 120

Compressor Over Current Protection [A]

CCR01 28 35 40 100
CCR02 30 37 42 105
CCR03 32 39 44 108
CCR04 35 42 47 102

Outdoor Fan Speed (RPM)

OFLOWC 610 600 600 600
OFMEDC 760
OFMAXC 700 760 760 920

11-14

SM DELTA 1-E.2 GB

TROUBLESHOOTING

CONTENT

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 Power!!!

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

It takes about 4 Min. to discharge the system.

Touching the controller before discharging may cause an electrical shock!!!

12.1

Single Split system failures and corrective
actions

No SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION

Power supply indicator
(Red LED) does not light

1

up.
Unit does not respond to
remote control message Remote control message

2

Unit responds to remote
control message but

3

Operate indicator (Green
LED) does not light up
Indoor fan does not start
(louvers are opened and
Green LED does light up)

4

Indoor fan works when
unit is OFF, and indoor
fan speed is not changed

5

by remote control
command.
Compressor does not

6

start
Compressor stops during
operation and Green

7

LED remains on
Compressor is on but
outdoor fan does not

8

work

No power supply

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

Electronics control
problem or protection

Electronic control or
power supply problem

Problem with outdoor
electronics or outdoor fan

Check power supply. If power supply
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.

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 replace controller
Replace controller

Perform diagnostics , and follow the
actions described.
Perform diagnostics ,and follow the
actions described.

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

SM DELTA 1-E.2 GB

12-1

TROUBLESHOOTING

CONTENT

No

Unit works in wrong
mode (cool instead of

9

heat or heat instead of
cool)
All components are
operating properly but no

10

cooling or no heating
Compressor is over
heated and unit does not

11

generate capacity
Units goes into
protections and

12

compressor is stopped
with no clear reason
Compressor motor is
generating noise and no

13

suction occurs
Water leakage from

14

indoor unit
Freezing of outdoor unit
in heat mode and

15

outdoor unit base is
blocked with ice
Unit operates with wrong
fan speeds or wrong

16

frequency

SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION

Check RV power connections, if OK,
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

Connect base heater.

Wrong jumper settings

Check RV operation with direct

230VAC power supply, if OK,

Replace outdoor controller.

Perform diagnostics and follow the

actions described.

Check compressor phase order.

Check and open drainage tube.

Perform diagnostics, 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

SM DELTA 1-E.2 GB

12.3 Judgment by Indoor/Outdoor Unit Diagnostics

CONTENT

Enter diagnostics mode - press for five seconds Mode/Reset button in any
operation mode. Acknowledgment is by 3 short beeps and lights of all Display
LED’s. Then, The units will enter into Indoor and Outdoor unit diagnostic
modes.
During the Outdoor unit diagnostics all three Indoor LED’s (STBY/Operate,
Filter and Timer) are blinking. When Indoor diagnostics is displayed, all three
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 Filter
& Timer LEDs.
The coding method will be as follows:
Filter LED will blink 5 times in 5 seconds, and then will be shut off for the next 5
seconds. Timer LED will blink during the same 5 seconds according to the following
Indoor / Outdoor unit tables:
Note: 0 – OFF, 1-ON

TROUBLESHOOTING

12.3.1 Indoor unit Diagnostics

No Problem 5 4 3 2 1

1

RT-1 is disconnected

2

RT-1 is shorted

3

RT-2 is disconnected

4

RT-2 is shorted

5

Reserved

7

Communication mismatch

8

No Communication

9

No Encoder

10

Reserved 0 1 0 1 0

11

Outdoor Unit Fault 0 1 0 1 1

…

Reserved

17

Defrost protection

18

Deicing Protection

19

Outdoor Unit Protection

20

Indoor Coil HP Protection

21

Reserved

22

Reserved

24

EEPROM Not Updated

25

Bad EEPROM

26

Bad Communication

27

Using EEPROM data

28

Model A

29

Model B

30

Model C

31

Model D











































SM DELTA 1-E.2 GB

12-3

TROUBLESHOOTING

y

CONTENT

12.3.2 Indoor unit diagnosis and corrective actions

No. Fault Probable Cause Corrective Action

Sensor failures of all

1

types
Communication

2

mismatch
No Communication

3

No Encoder

4

Outdoor Unit Fault

5

EEPROM Not

6

Updated

Bad EEPROM

7

Bad Communication

8

Using EEPROM

9

data

Indoor and Outdoor controllers are
with different versions

Communication or grounding wiring is
not good.
Indoor electronics or motor Check motor wiring, if ok,

Outdoor controller problem Switch to Outdoor diagnostics.
System is using ROM parameters and

not EEPROM parameters

No action, unless special

Communication quality is low reliabilit

No problem. System is using
EEPRRRROM 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.

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

parameters are required for
unit operation.
Check Indoor to Outdoor wiring
and grounding

12.3.3 Outdoor unit Diagnostics :

DCR 22/25/35 Diagnostics

No Problem 5 4 3 2 1

OCT is disconnected

1

OCT is shorted

2

CTT is disconnected

3

CTT is shorted

4

reserved

5

reserved

6

OAT is disconnected (when enabled)

7

OAT is shorted (when enabled)

8

reserved

9

reserved

10

IPM Fault

11

reserved

12

DC under voltage

13

DC over voltage

14

AC under voltage

15

Indoor / Outdoor unit Communication mismatch

16

No Communication

17

Reserved

18

Reserved

19

Reserved

20

Deicing

21

Compressor Over Heating

22

Compressor Over Current

23

Reserved

24

Reserved

25

Copressor Lock

26

Bad Communication

27

Heat sink Over Heating

20

Deicing

21

Compressor Over Heating

22

Copressor Lock

26

Bad Communication

27

0 0 0 0 1

0 0 0 1 0

0 0 0 1 1

0 0 1 0 0

0 0 1 1 1

0 1 0 0 0

0 1 0 1 1

0 1 1 0 1

0 1 1 1 0

0 1 1 1 1

1 0 0 0 0

1 0 0 0 1

1 0 1 0 1

1 0 1 1 0

1 0 1 1 1

1 1 0 1 0

1 1 0 1 1

1 0 1 0 0

1 0 1 0 1

1 0 1 1 0

1 1 0 1 0

1 1 0 1 1

12-4

SM DELTA 1-E.2 GB

TROUBLESHOOTING

CONTENT

DCR50 diagnostics:

No Problem 5 4 3 2 1

OCT is disconnected

1

OCT is shorted

2

CTT is disconnected

3

CTT is shorted

4

HST is disconnected (when enabled)

5

HST is shorted (when enabled)

6

OAT is disconnected (when enabled)

7

OAT is shorted (when enabled)

8

TSUC is disconnected (when enabled)

9

TSUC is shorted (when enabled)

10

IPM Fault

11

Bad EEPROM

12

DC under voltage

13

DC over voltage

14

AC under voltage

15

Indoor / Outdoor unit Communication mismatch

16

No Communication

17

Reserved

18

Heat sink Over Heating

20

Deicing

21

Compressor Over Heating

22

Compressor Over Current

23

No OFAN Feedback

24

OFAN Locked

25

Compressor Lock

26

Bad Communication

27

0 0 0 0 1

0 0 0 1 0

0 0 0 1 1

0 0 1 0 0

0 0 1 0 1

0 0 1 1 0

0 0 1 1 1

0 1 0 0 0

0 1 0 0 1

0 1 0 1 0

0 1 0 1 1

0 1 1 0 0

0 1 1 0 1

0 1 1 1 0

0 1 1 1 1

1 0 0 0 0

1 0 0 0 1

1 0 0 1 0

1 0 1 0 0

1 0 1 0 1

1 0 1 1 0

1 0 1 1 1

1 1 0 0 0

1 1 0 0 1

1 1 0 1 0

1 1 0 1 1

SM DELTA 1-E.2 GB

12-5

TROUBLESHOOTING

CONTENT

12.3.4 Outdoor unit diagnosis and corrective actions

NO

1

2

3

4

5

6

7

8

9

Fault

Sensors failures of all
types

IPM Fault

Bad EEPROM

DC under/over Voltage

AC under Voltage

Indoor / Outdoor unit
Communication mismatch

No Communication

Compressor Lock

Bad Communication

Probable Cause Corrective Action

Check sensors connections

or replace sensors.
Electronics HW
problem

No action, unless special

Electronics HW
problem
Check outdoor unit power

Indoor and Outdoor
controllers are with
different versions
Communication or
grounding wiring is not
good.
Switch unit to STBY and

Communication quality is
low reliability

Check all wiring and jumper

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

12.4 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).

12-6

SM DELTA 1-E.2 GB

12.5.2 Checking Power Input.

CONTENT

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).

TROUBLESHOOTING

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; it is
ringed on the valve. Check the drive voltage (12VDC). When Outdoor unit is
power on, EEV shall run and have click and vibration.

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’t touch the naked lead wire and don’t insert finger,
conductor or anything 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

SM DELTA 1-E.2 GB

 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, don’t pull the wire.

12-7

EXPLODED VIEWS AND SPARE PARTS LISTS

CONTENT

13. EXPLODED VIEWS AND SPARE PARTS LISTS

13.1 Indoor Unit: Delta 22, 25, 35 DCI

SM DELTA 1-E.2 GB

13-1

EXPLODED VIEWS AND SPARE PARTS LISTS

CONTENT

13.2 Intdoor Unit: Delta 22, 25 DCI

No. Part No. Name Quan.

1 453037000 Grill A / DELTA 22,25 1

2 453100500 Grill L axis 1

3 453100600 Grill R axis 1

4 453036500 Filter for DELTA 7/9 2

7 465720000 Silk-screen front frame for Electra 1

8 4525987 SCREW COVER 3

9 453070701 Evap. System Assy./DELTA 22,25 1

10 4523526 BERAING ASSY FAN 1

11 4523523 FAN ASSY PLASTIC 1

12 452784400 IOD-7,9 Air Outlet Assy. (no wire) 1

13 4523693 DRAIN HOSE 1

14 4526659 REAR PANEL ASSY 1

15 453027400 Mount Bracket Assy./Alfa 7,9 1

16 4526000 TUBE CLIP 1

17 453130700 Remote Controller RC-7Silver )EHK P/N 977-800-40 1

18 4526133 Power cord cable 1

19 4523507 Step motor 1

20 453089600 Display assy. for DELTA EHK:936-034-00 1

21 453088600 PG Resin motor 12W 1

22 453089500 DELTA DCI indoor controller EHK: 916-540-00 1

23 4525998 MOTOR COVER 1

24 438082 Thermistor Indoor coilBLACK 1

25 4519813 Thermistor room 1

26 453027000 Terminal Cover 1

13-2

SM DELTA 1-E.2 GB

13.3 Indoor Unit: Delta 35 DCI

CONTENT

No. Part No. Name Quan.

1 453036800 Grill A / DELTA 12 1

2 453100500 Grill L axis 1

3 453100600 Grill R axis 1

4 453082900 Filter for DELTA 12 2

7 465720001 Silk-screen front frame for Electra 1

8 4525987 SCREW COVER 3

9 453058201 Evap. System Assy./DELTA 35 1

10 4523526 BERAING ASSY FAN 1

11 4527111 FAN ASSY PLASTIC 1

12 452784401 IOD-12 Air Outlet Assy. (no wire) 1

13 4523693 DRAIN HOSE 1

14 4527186 IOD-12 REAR PANEL ASSY 1

15 453027500 Mount Bracket Assy./Alfa 12 1

16 4527512 Tube Clip 1

17 453130700 Remote Controller RC-7 (Silver )EHK P/N 977-800-40 1

18 4526133 Power cord cable 1

19 4523507 Step motor 1

20 453089600 Display assy. for DELTA EHK:936-034-00 1

21 453088600 PG Resin motor 12W 1

22 453089500 DELTA DCI indoor controller EHK: 916-540-00 1

23 4525998 MOTEOR COVER BLACK 1

24 438082 Thermistor Indoor coil 1

25 4519813 Thermistor room 1

26 453027000 Terminal Cover 1

EXPLODED VIEWS AND SPARE PARTS LISTS

SM DELTA 1-E.2 GB

13-3

EXPLODED VIEWS AND SPARE PARTS LISTS

CONTENT

13.4 Indoor Unit: Delta 50 DCI

1

2

28

3

4

5

6

8

10

27

26

25

24

23

22

21

7

20

19

9

18

11

12

13

13-4

17

16

15

14

SM DELTA 1-E.2 GB

13.5 Indoor Unit: Delta 50 DCI

CONTENT

No. Part No. Name Quan.

1 465800000 Grill A Assy./Delta 50 1

2 453080800 Filter 2

3 470500003 Filter Assy. 1

4 465720020 Front Frame Assy./Delta 50 AIRWELL FOR EU 1

5 453081000 Screw Cover 3

6 462350006 Evaporator Assy. 1

7 4518662 Bearing assy fan 1

8 453082400 Impeller Fan 1

9 467300007 Display Board Assy./DELTA EHK: 936-035-00 1

10 453101600 Air Outlet Frame Assy./ALPHA-17 FOR EU 1

465800003 Air Outlet Frame Assy./ALPHA-17 FOR AUS 1

11 4518664 Drain hose 1

EXPLODED VIEWS AND SPARE PARTS LISTS

12 453101400 Unit Housing Assy./ALPHA-17 1

13 453081900 Mount Bracket Assy. 1

14 4526000 TUBE CLIP 1

15 453130700 Remote Controller RC-7 (Silver)EHK P/N 977-800-40 1

438600 Remote controller RC3-RC 973-600-00 (OPTION) 1

16 4523507 Step motor 1

17 452766401 Power Cord European 2m 1

452766400 Power Cord ISRAEL 1

18 4518651 Cover Side Motor 1

19 453024500 PG Motor 1

20 452918800 Cover/motor 1

21 467300025 DCI Indoor Controller/DELTA EHK: 916-541-00 1

22 4525988 CABLE LOCKER 1

23 436525 SUPPLY CORD LATCH WMN 1

24 438082 hermistor Indoor coil BLACK 1

25 4519813 Thermistor room 1

26 453027000 Terminal Cover 1

27 465440001 Grill Left Crank 1

SM DELTA 1-E.2 GB

28 465440002 Grill Right Crank 1

13-5

EXPLODED VIEWS AND SPARE PARTS LISTS

CONTENT

13.6 Outdoor Unit: DСR 22, 25, 35 DCI

22

232628

25

21

20

19

18

17

16

81012

27 24

29

3

12 4567911131415

30

13-6

SM DELTA 1-E.2 GB

13.7 Outdoor Unit: DСR 22 DCI

CONTENT

No. Part No. Name Quan.

1 4522551 Grille A of GCN 1

2 4523441 Front panel A Painting assy 1

3 4519251 Axial Fan OD=400 1

4 453238900 Sensor/OAT 1

5 4526775 Compressor top thermistor(CTT) 1

6 4526776 Outdoor coil thermistor(OCT) 1

7 453170100 Compressor Assy. MATSUSHIBA 5RS092XDJ01 1

8 453052500 PAINTING BASE ASSY. 1

9 4526221 Compressor wire 1

10 4518951 4-W valve SHF-4H for R410A 1

11 4522509 4-Way valve coil 1

12 453058600 4way valve soldering assy FOR DCR 7 1

13 453026600 Electronic expansion valve ZDPF(L)-1.5C-01 1

14 4526216 EEV COIL QA(L)12-MD-02 1

15 453047000 Low pressure stop valve for R410A 1

16 4516857 BIG SIDE COVER 1

17 453046900 High pressure stop valve for R410A 1

18 464630000 Side Plate Painting Assy. 1

19 204107 Clip set PVC 1

20 4519188 4 poles terminal block 1

21 4516156 Rear panel Painting assy 1

22 453230000 Connect Plate 1

23 453048000 Condenser assy. (OD7.94x1row) for DCR 7 1

24 453052700 PATITION 1

25 323156 Motor support assy 1

26 4516158 Cover panel Painting assy 1

27 453031300 Metal motor 20W 1

28 453031000 DC INVERTER CONTROLLER EHK:906-106-00 1

29 452841100 Earth wire 1

30 453129300 Wire UL1007 16AWG/Controller with 250 connector 1

EXPLODED VIEWS AND SPARE PARTS LISTS

SM DELTA 1-E.2 GB

13-7

EXPLODED VIEWS AND SPARE PARTS LISTS

CONTENT

13.8 Outdoor Unit: DСR 25 DCI

No. Part No. Name Quan.

1 4522551 Grille A of GCN 1

2 4523441 Front panel A Painting assy 1

3 4519251 Axial Fan OD=400 1

4 453238900 Sensor/OAT 1

5 4526775 Compressor top thermistor(CTT) 1

6 4526776 Outdoor coil thermistor(OCT) 1

7 453170100 Compressor Assy. MATSUSHIBA 5RS092XDJ01 1

8 453052500 PAINTING BASE ASSY. 1

9 4526221 Compressor wire 1

10 4518951 4-W valve SHF-4H for R410A 1

11 4522509 4-Way valve coil 1

12 453058700 4way valve soldering assy FOR DCR 9 1

13 453026600 Electronic expansion valve ZDPF(L)-1.5C-01 1

14 4526216 EEV COIL QA(L)12-MD-02 1

15 453047000 Low pressure stop valve for R410A 1

16 4516857 BIG SIDE COVER 1

17 453046900 High pressure stop valve for R410A 1

18 464630000 Side Plate Painting Assy. 1

19 204107 Clip set PVC 1

20 4519188 4 poles terminal block 1

21 4516156 Rear panel Painting assy 1

22 453230000 Connect Plate 1

23 453048200 Condenser assy. (OD7x2rows) for DCR 9 1

24 453052700 PATITION 1

25 323156 Motor support assy 1

26 4516158 Cover panel Painting assy 1

27 453031300 Metal motor 20W 1

28 453031000 DC INVERTER CONTROLLER EHK:906-106-00 1

29 452841100 Earth wire 1

13-8

30 453129300 Wire UL1007 16AWG/Controller with 250 connector 1

SM DELTA 1-E.2 GB

13.9 Outdoor Unit: DСR 35 DCI

CONTENT

No. Part No. Name Quan.

1 4522551 Grille A of GCN 1

2 4523441 Front panel A Painting assy 1

3 4519251 Axial Fan OD=400 1

4 453238900 Sensor/OAT 1

5 4526775 Compressor top thermistor(CTT) 1

6 4526776 Outdoor coil thermistor(OCT) 1

7 4526204 Compressor Assy. MATSUSHIBA 5RS102XAB 1

8 453052500 PAINTING BASE ASSY. 1

9 4526221 Compressor wire 1

10 4518951 4-W valve SHF-4H for R410A 1

11 4522509 4-Way valve coil 1

12 453058800 4way valve soldering assy FOR DCR 35 1

EXPLODED VIEWS AND SPARE PARTS LISTS

13 453026600 Electronic expansion valve ZDPF(L)-1.5C-01 1

14 4526216 EEV COIL QA(L)12-MD-02 1

15 453047000 Low pressure stop valve for R410A 1

16 4516857 BIG SIDE COVER 1

17 453046900 High pressure stop valve for R410A 1

18 464630000 Side Plate Painting Assy. 1

19 204107 Clip set PVC 1

20 4519188 4 poles terminal block 1

21 4516156 Rear panel Painting assy 1

22 453230000 Connect Plate 1

23 453048400 Condenser assy. (OD7.94x2rows) for DCR 35 1

24 453052700 PATITION 1

25 323156 Motor support assy 1

26 4516158 Cover panel Painting assy 1

27 453031200 Metal motor 27W 1

28 453031000 DC INVERTER CONTROLLER EHK:906-106-00 1

29 452841100 Earth wire 1

SM DELTA 1-E.2 GB

30 453129300 Wire UL1007 16AWG/Controller with 250 connector 1

13-9

EXPLODED VIEWS AND SPARE PARTS LISTS

CONTENT

13.10 Outdoor Unit: DCR 50 DCI

13-10

SM DELTA 1-E.2 GB

13.11 Outdoor Unit: DСR 50 DCI

CONTENT

No. Part No. Name Quan.

1 433219 Front Panel A1 1

2 4526340 Air inlet ring-420 1

3 433223 Painting Insulation Plate 1

4 4526476 Axial fan OD=401 1

5 452889600R DC Resin Motor(Nidec) 1

6 433215 Motor Support 1

7 4527363 Base Painting Assy. 1

8 4526299 Partition 1

9 453030500R Outdoor DCI Controller/2.8kW(English) 90 1

10 4524595 Gas Valve for ONG R410A 1

11 4526301 High pressure stop valve R410a 1

12 467300024R Filter Board/901A108-00 1

13 4526396 Choke assy. 167-021-01 1

14 4526223 AC-IN wire 1

15 4526968 Earthing wire with magnetic ring 1

16 4526222 Fuse connected wire 1

17 4526300 Therminal sheet 1

18 4526220 Fuse stand JEF-511B(EHK P/N:150-038-00) 1

19 4526533 6C(20A,250VAC) 1

20 204107 Cable clip Nylon 1

21 4519188 4 poles terminal block 1

22 433229 Valve Cover 1

23 4522509 4-Way valve coil 1

24 461600003 4-WayValveAssy 1

25 4518952 4-W valve SHF-7H for R410A 1

26 4526221 Compressor wire 1

27 4523446 Scroll comp assy. 5CS13 1

28 4526775 Compressor top 1

29 4526774 Outdoor air thermistor(OAT) 1

30 4526776 OU coil thermistor (OCT) for DCI 1

31 4526215 Electronic expansion valve ZDPF(L)- 1

32 4526216 EEV COIL QA(L)12-HR-01A-RK 1

33 4519606 Right side panel (painting plate) 1

34 433228 Back Side Net 1

35 470660008 CondenserList/DCR50R410A 1

36 4526298 Bridge 1

37 4519614 Painting Top Cover 1

38 4526480 Gasket for axial fan 1

39 4519300 Nut M5 L 1

40 433225 Handle 1

41 4519607 Left Side Panel Painting Plate 1

EXPLODED VIEWS AND SPARE PARTS LISTS

SM DELTA 1-E.2 GB

13-11

APPENDIX A

CONTENT

APPENDIX A

INSTALLATION AND OPERATION MANUAL

► OPERATING MANUAL DELTA 22/25/35/50 DCI

► INSTALLATION MANUAL DELTA 22/25/35/50 DCI

SM DELTA 1-E.2 GB

14-1