Electra LEX 7, ONG 7, LEX 9, ONG 9, LEX 12 Service Manual

Service Manual

LEX Series

REFRIGERANT

R410A

COOLING ONLY
HEAT PUMP

JANUARY - 2006

Indoor Units Outdoor Units

LEX 7 ONG 7
LEX 9 ONG 9
LEX 12 ONG 12
LEX 14 ONG 14

A

LIST OF EFFECTIVE PAGES

Revision Y06-01

Service Manual - LEX

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 ........ January 2006

Total number of pages in this publication is 92 consisting of the following:

Page
No.

Revision
No. #

Page
No.

Revision
No. #

Page
No.

Revision
No. #

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

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14-1 – 14-15 ......... 0

15-1 – 15-3 ........... 0

Appendix -A ...........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 Y06-01Service Manual - LEX

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. ELECTRICAL CONNECTIONS .............................................................................9-1

10. REFRIGERATION DIAGRAMS .............................................................................10-1

11. TUBING CONNECTIONS ......................................................................................11-1

12. CONTROL SYSTEM .............................................................................................12-1

13. TROUBLESHOOTING ..........................................................................................13-1

14. EXPLODED VIEWS AND SPARE PARTS LISTS .................................................14-1

15. OPTIONAL ACCESSORIES .................................................................................15-1

16. APPENDIX A .........................................................................................................16-1

1-1

INTRODUCTION

Revision Y06-01

Service Manual - LEX

1. INTRODUCTION

1.1 General

The new LEX split wall mounted range comprise the ST (cooling only) and RC (heat
pump) models, as follows:

• Cooling Only LEX 7ST, LEX 9ST, LEX 12ST, LEX 14ST.

• Heat Pump LEX 7RC, LEX 9RC, LEX 12RC, LEX 14RC.

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

Display type models availability:

• LED Type LEX7, LEX9, LEX12, LEX14.

1.2 Main Features

The LEX series benefits from the most advanced technological innovations, namely:

• R410A models

• Microprocessor control.

• Infrared remote control with liquid crystal display.

• Supports Indoor Air Quality features, such as – Ionizer, Active Electro-Static Filter,

and Fresh Air.

• 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.

• Easy access to the interconnecting tubing and wiring connections, so that

removing the front grill or casing is not necessary.

• Refrigerant pipes can be connected to the indoor unit from 5 different optional

directions.

• Automatic treated air sweep.

• Low indoor and outdoor noise levels.

• Easy installation and service.

1-2

INTRODUCTION

Revision Y06-01

Service Manual - LEX

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.

• Advanced electronic control box assembly

• Interconnecting wiring terminal block

• Mounting plate

1.4 Filtration

The LEX series presents several types of air filters:

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

• Pre-charged electrostatic filter (disposable)

• Active carbon filter (disposable)

• ESF. Active Electro Static re-usable filter (optional)

1.5 Ionizer (Optional)

A special design Ionizer protected by unique patents integrated into the indoor unit,
generating negative ions to the room providing comfort and upgraded indoor air quality.

1.6 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 Remote Control Manual, Appendix A.

1-3

INTRODUCTION

Revision Y06-01

Service Manual - LEX

1.7 Outdoor Unit

The LEX 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.

It includes :

• Axial fan.

• Outdoor coil with hydrophilic louver fins for RC units.

• Outlet air fan grill.

• Service valves” flare” type connection.

• Interconnecting wiring terminal block.

• Fresh air motor for LEX 7-14 (optional).

1.8 Tubing Connections

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

1.9 Accessories

ASK (All Season Kit):

For low ambient working conditions in cooling, an ASK can be installed inside the
outdoor unit. This kit allows cooling operation down to outdoor temp of -10 ºC by
gradually controlling the outdoor fan speed motor.

RCW Wall Mounted Remote Control

The RCW remote control is mounted on the wall, and controls the unit either as an
infrared remote control or as a wired controller. The wired controller can control up to
10 Indoor units with the same program settings and adjustments.
For further details please refer to Optional Accessories, Chapter 18.

1.10 Inbox Documentation

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

1-4

INTRODUCTION

Revision Y06-01

Service Manual - LEX

1.11 Matching Table

1.11.1 R410A

OUTDOOR UNITS

INDOOR UNITS

MODEL REFRIGER. LEX7 LEX9 LEX12 LEX14 K9 K11 K15 PXD9 PXD12 PXD15

ONG7 ST R410A √

ONG9 ST R410A √ √ √

ONG12 ST R410A √ √ √

ONG14 ST R410A √ √ √

ONG7 RC R410A √

ONG9 RC R410A √ √ √*

ONG12 RC R410A √ √

ONG14 RC R410A √* √

√* - The outdoor unit of this combination cannot be matched to other indoor units.
The above table lists outdoor units and LEX indoor units which can be matched together. In addition the

listed outdoor units can be matched with other types of indoor units such as cassettes, floor/ceiling.
For further information please refer to the relevant Service Manual.

2-1

PRODUCT DATA SHEET

Revision Y06-01

Service Manual - LEX

2. PRODUCT DATA SHEET

2.1 LEX 7 R410A Specification

Units Cooling Only

Btu/hr 7230

kW 2.12
kW 0.63

W/W 3.37

A

V/Ph/Hz

A2.8
A
A

H/M/L RPM
H/M/L m3/hr

Min-Max Pa

H/M/L dB(A)
H/M/L dB(A)

l/hr
mm

WxHxD mm

kg

WxHxD mm

kg
units
units

H/L RPM
H/L m3/hr
H/L dB(A) 60
H/L dB(A) 48

WxHxD mm

kg 31

WxHxD mm

kg 35
Units
units

kg/m 0.8kg/7.5m

4mL10m:+0g

10mL15m:+75g
In.(mm)
In.(mm)

m.
m.

kW

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

Refrigerant chargless distance 0.85kg/7.5m

4mL10m:+0g

10mL15m:+75g

3/8"(9.53)

Max.15

Max.7

Liquid line
Suction line
Max.tubing length

220-240V/Single/50Hz

15

10

Crossflow x 1

2.72.8

LEX-7

ONG-7

Flared

3.65

HeatingCooling

INDOOR

Connections

between units

OUTDOOR

Capacity

(4)

Power input

(4)

Air flow

Fan speeds

Fan type & quantity

Compressor type,model

Refrigerant control

A

7400

2.12 2.17

0.63 0.595

A

3.37

7230

9

945x395x655

45/41/39
30/27/25

0.7
16

810x210x285

48

795x290x610

11

60

0

380/320/280

860/760/660

870x285x355

13.5
36

680

Package dimensions

32

1/4"(6.35)

9 levels

3 levels

R410A

Capillary tube (with 026 restrictor)

Propeller(direct) x 1

Rotary,Toshiba PA82X1C-4DZDE

1660

Refrigerant type

Model Indoor Unit
Model Outdoor Unit
Installation Method of Pipe

Dimensions

Sound pressure level

(3)

Characteristics

EER (Cooling) or COP(Heating)

(4)

Weight

Condenstate drain tube I.D

Additional charge

Stacking height

Units per pallet

Packaged weight

Package dimensions

Sound power level

Stacking height

Units per pallet

Packaged weight

Weight

Fan type & quantity

Sound pressure level

(3)

Moisture removal

Air flow

(1)

Fan speeds

36

Power supply

Energy efficiency class

Sound power level

(2)

External static pressure

Circuit breaker rating

Starting current

Rated current

Dimensions

Heating elements (Option)
Others

Max.height difference

Remote control

0.3

Operation control type

2-2

PRODUCT DATA SHEET

Revision Y06-01 Service Manual - LEX

2.2 LEX 9 R410A Specification

Units Cooling Only

Btu/hr 9280

kW 2.72
kW 0.825

W/W 3.30

A

V/Ph/Hz

A3.7
A
A

H/M/L RPM
H/M/L m3/hr

Min-Max Pa

H/M/L dB(A)
H/M/L dB(A)

l/hr
mm

WxHxD mm

kg

WxHxD mm

kg
units
units

H/L RPM
H/L m3/hr
H/L dB(A) 61
H/L dB(A) 51

WxHxD mm

kg 34

WxHxD mm

kg 38
Units
units

kg(7.5mm)

In.(mm)
In.(mm)

m.

m.

kW

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

53

795x290x610

35

4mL10m: +0g; 10m L15m: +100g

13.5
36

1780

62

220-240V/Single/50Hz

18.7

10

Crossflow x 1

3.83.7

LEX-9

ONG-9

Flared

3.42

HeatingCooling

INDOOR

Connections

between units

OUTDOOR

Capacity

(4)

Power input

(4)

Air flow

Fan speeds

Fan type & quantity

Compressor type,model

Refrigerant control

B

9890

2.72 2.90

0.825 0.849

A

3.30

9280

960/860/760

9

945x395x655

49/46/44
35/31/28

0.9
16

810x210x285

11

870x285x355

1/4"(6.35)

9 levels

3 levels

R410A

Capillary tube (with 029 restrictor)

Propeller(direct) x 1

Rotary,Hitachi ASG108CV-B7AT

780

39

1.03

3/8"(9.53)

Max.15

Max.7

Model Indoor Unit
Model Outdoor Unit
Installation Method of Pipe

Dimensions

Sound pressure level

(3)

Package dimensions

Sound power level

Remote control

0.3

Characteristics

EER (Cooling) or COP(Heating)

(4)

Operation control type

Stacking height

Units per pallet

Packaged weight

Weight

Heating elements (Option)
Others

Refrigerant type

Liquid line
Suction line
Max.tubing length
Max.height difference

Refrigerant charge(stabdard connecting tubing length)
Additional charge

Stacking height

Units per pallet

Packaged weight

Weight

Dimensions

Condenstate drain tube I.D

Package dimensions

Fan type & quantity

Sound pressure level

(3)

Moisture removal

Air flow

(1)

Fan speeds

Power supply

Energy efficiency class

Sound power level

(2)

External static pressure

Circuit breaker rating

Starting current

Rated current

0

450/380/330

2-3

PRODUCT DATA SHEET

Revision Y06-01

Service Manual - LEX

2.3 LEX 12 R410A Specification

Units Cooling Only

Btu/hr 12210

kW 3.58
kW 1.112

W/W 3.22

A

V/Ph/Hz

A5.0
A
A

H/M/L RPM
H/M/L m3/hr

Min-Max Pa

H/M/L dB(A)
H/M/L dB(A)

l/hr
mm

WxHxD mm

kg

WxHxD mm

kg
units
units

H/L RPM
H/L m3/hr
H/L dB(A) 61
H/L dB(A) 51

WxHxD mm

kg 35

WxHxD mm

kg 39
Units
units

kg(7.5mm)

In.(mm)
In.(mm)

m.
m.

kW

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

61
51

795x290x610

36

11.5

870x285x355

14
36

220-240V/Single/50Hz

25

15

Crossflow x 1

5.25.0

LEX-12

ONG-12

Flared

3.62

HeatingCooling

Fan speeds

Fan type & quantity

Compressor type,model

Refrigerant control

A

14160

3.58 4.15

1.112 1.145

A

3.22

12210

0

635/550/450

1230/1080/930

9

945x395x655

55/53/49
43/39/35

1.3
16

810x210x285

1/4"(6.35)

9 levels

3 levels

R410A

Capillary tube

Propeller(direct) x 1

Rotary,RN 145 VHSMT

1850

1.13

4mL10m: +0g; 10m L15m: +50g

Model Indoor Unit
Model Outdoor Unit
Installation Method of Pipe

Dimensions

Sound pressure level

(3)

Sound power level

INDOOR OUTDOOR

Capacity

(4)

Power input

(4)

Characteristics

EER (Cooling) or COP(Heating)

(4)

Operation control type

Stacking height

Units per pallet

Packaged weight

Weight
Package dimensions

Connections

between units

Air flow

Heating elements (Option)
Others

Refrigerant type

Liquid line
Suction line
Max.tubing length
Max.height difference

Refrigerant charge(stabdard connecting tubing length)
Additional charge

Stacking height

Units per pallet

Packaged weight

Weight

Rated current

Dimensions

Condenstate drain tube I.D

Package dimensions

Fan type & quantity

Sound pressure level

(3)

Moisture removal

Air flow

(1)

Fan speeds

810

40

Power supply

Energy efficiency class

Sound power level

(2)

External static pressure

Circuit breaker rating

Starting current

3/8"(9.53)

Max.15

Max.7

Remote control

0.3

2-4

PRODUCT DATA SHEET

Revision Y06-01 Service Manual - LEX

2.4 LEX 14 R410A Specification

Units Cooling Only

Btu/hr 14400

kW 4.22
kW 1.31

W/W 3.22

A

V/Ph/Hz

A5.9
A
A

H/M/L RPM
H/M/L m3/hr

Min-Max Pa

H/M/L dB(A)
H/M/L dB(A)

l/hr
mm

WxHxD mm

kg

WxHxD mm

kg
units
units

H/L RPM
H/L m3/hr
H/L dB(A) 63
H/L dB(A) 53

WxHxD mm

kg 41.5

WxHxD mm

kg 45.5
Units
units

kg/m

In.(mm)
In.(mm)

m.

m.

kW

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

0.3

1/2"(12.7)

Max.15

Rated current

0

Remote control

Package dimensions

Weight

Power supply

Energy efficiency class

Sound power level

(2)

External static pressure

Circuit breaker rating

Starting current

Fan speeds

660/550/475

Dimensions

Condenstate drain tube I.D

Air flow

(1)

1280/1080/930

Others

Refrigerant type

Liquid line
Suction line
Max.tubing length
Max.height difference

Refrigerant chargless distance
Additional charge

Operation control type

Units per pallet

Packaged weight

Connections

between units

Heating elements (Option)

42.2

1/4"(6.35)

Characteristics

EER (Cooling) or COP(Heating)

(4)

Weight

INDOOR

Fan type & quantity

Sound pressure level

(3)

Moisture removal

Stacking height

46.5

Max.7

Model Indoor Unit
Model Outdoor Unit
Installation Method of Pipe

Dimensions

Sound pressure level

(3)

Package dimensions

Sound power level

OUTDOOR

Rotary,Sanyo C-RV168H1AB

920

53

795x290x610

9

945x395x655

56/51/46
46/41/36

1.5
16

810x210x285

11.5

870x285x355

Propeller(direct) x 1

C

15010

4.22 4.40

1.31 1.310

A

3.22

14400

Capacity

(4)

Power input

(4)

Air flow

Fan speeds

Fan type & quantity

Compressor type,model

Refrigerant control

Stacking height

Units per pallet

Packaged weight

LEX-14

ONG-14

Flared

3.36

HeatingCooling

220-240V/Single/50Hz

30

15

Crossflow x 1

5.95.9

1.38kg/7.5m

4mL10m: +0g 10m L15m: +120g

14
36

2160

63

9 levels

3 levels

R410A

Capillary tube

3-1

RATING CONDITIONS

Revision Y06-01

Service Manual - LEX

3. RATING CONDITIONS

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

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

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 27

o

C DB 24oC DB 18oC WB

Lower limit 10

o

C DB -9oC DB -10oC WB

Voltage 1PH 198 ÷ 264 V

4-1

OUTLINE DIMENSIONS

Revision Y06-01Service Manual - LEX

4. OUTLINE DIMENSIONS

4.1 LEX 7, 9, 12, 14 / ONG3 -7, 9, 12, 14

5-1

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01Service Manual - LEX

5. PERFORMANCE DATA & PRESSURE CURVES

5.1 LEX7 / ONG7 R410A

5.1.1 Cooling Mode at 7.5m Tubing Connection.

230V : Indoor Fan at High Speed.

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

(1) Marked area is below standard operating limits. For operating in low ambient

conditions, refer to Optional Accessories (Chapter 15).

Entering Air WB/DB ID Coil(oC)

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

TC

2.23 2.31 2.37 2.42 2.46

15

(1)

SC

1.59 1.65 1.72 1.76 1.79

PI

0.45 0.45 0.45 0.45 0.45

TC

2.16 2.28 2.35 2.41 2.46

20

(1)

SC

1.55 1.64 1.71 1.76 1.79

PI

0.49 0.49 0.49 0.49 0.49

TC

2.05 2.21 2.32 2.39 2.45

25 SC

1.52 1.61 1.70 1.74 1.78

PI

0.52 0.53 0.53 0.53 0.54

TC

1.91 2.08 2.25 2.33 2.40

30 SC

1.47 1.56 1.66 1.71 1.74

PI

0.57 0.57 0.58 0.58 0.59

TC

1.77 1.92

2.12

2.23 2.33

35 SC

1.40 1.50

1.62

1.67 1.70

PI

0.61 0.62

0.63

0.63 0.64

TC

1.61 1.75 1.91 2.09 2.20

40 SC

1.32 1.42 1.53 1.58 1.61

PI

0.66 0.67 0.68 0.69 0.69

TC

1.40 1.53 1.68 1.86 2.00

46 SC

1.21 1.30 1.40 1.45 1.48

PI

0.72 0.73 0.75 0.76 0.77

Entering Air DB

OD Coil(

o

C)

Data

5-2

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01 Service Manual - LEX

5.1.2 Heating Mode at 7.5m Tubing Connection.

230V : Indoor Fan at High Speed.

* the above chart includes the weighted deicing infleuence.

LEGEND

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

5.2 Capacity Correction Factor Due to Tubing Length

5.2.1 Cooling

TOTAL TUBING LENGTH (One Way)

3m

7.5m

10m 15m 20m 25m 30m 40m 50m

1.02

1

0.961 0.949 --- --- --- --- ---

* Minimum recommended tubing length between indoor and outdoor units is 3m.

5.2.2 Heating

TOTAL TUBING LENGTH (One Way)

3m

7.5m

10m 15m 20m 25m 30m 40m 50m

1.05

1

0.975 0.965 --- --- --- --- ---

* Minimum recommended tubing length between indoor and outdoor units is 3m.

15 20 25

ENTERING WB

OD COIL(

o

C)

TH Pl TH Pl TH Pl

-10 1.13 0.48 1.09 0.51 1.04 0.53

-7 1.21 0.49 1.17 0.51 1.13 0.54

-2 1.29 0.49 1.25 0.52 1.20 0.55
2 1.57 0.52 1.51 0.55 1.44 0.58

62.210.56

2.15 0.60

2.07 0.63
10 2.41 0.59 2.34 0.63 2.28 0.67
15 2.60 0.61 2.54 0.66 2.47 0.70
20 2.74 0.63 2.68 0.68 2.60 0.74

ENTERING AIR DB ID COIL(

O

C)

5-3

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01Service Manual - LEX

5.3 Pressure Curves.

5.3.1 Cooling.

Suction Pressure VS.Outdoor Temp

5.0

6.0

7.0

8.0

9.0

10.0

11.0

12.0

13.0

14.0

15 20 25 30 35 40 46

Outdoor Temp.(DB oC )

Suction Pressure (Bar[g])

15/21(WB/DB ºC)
17/24(WB/DB ºC)
19/27(WB/DB ºC)
21/29(WB/DB ºC)
23/32(WB/DB ºC)

Discharge Pressure VS.Outdoor Temp

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

15 20 25 30 35 40 46

Outdoor Temp.(DB oC )

Discharge Pressure (Bar[g])

15/21(WB/DB ºC)
17/24(WB/DB ºC)
19/27(WB/DB ºC)
21/29(WB/DB ºC)
23/32(WB/DB ºC)

5-4

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01 Service Manual - LEX

5.3.2 Heating.

Discharge Pressure VS.Outdoor Temp

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

15 20 25 30 35 40 46

Outdoor Temp.(DB oC )

Discharge Pressure (Bar[g])

15/21(WB/DB ºC)
17/24(WB/DB ºC)
19/27(WB/DB ºC)
21/29(WB/DB ºC)
23/32(WB/DB ºC)

Discharge Pressure VS.Outdoor Temp

16

18

20

22

24

26

28

30

32

-10 -5 0 5 10 15 20

Outdoor Temp.( WB oC )

Discharge Pressure(Bar[g])

25 DB (ºC)
20 DB (ºC)
15 DB (ºC)

5-5

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01Service Manual - LEX

5.4 LEX9 / ONG9 R410A

5.4.1 Cooling Mode at 7.5m Tubing Connection.

230V : Indoor Fan at High Speed.

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

(1) Marked area is below standard operating limits. For operating in low ambient

conditions, refer to Optional Accessories (Chapter 15).

Entering Air WB/DB ID Coil(oC)

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

TC

2.87 2.97 3.04 3.11 3.16

15

(1)

SC

1.93 2.01 2.09 2.14 2.18

PI

0.58 0.59 0.59 0.59 0.59

TC

2.77 2.92 3.02 3.09 3.15

20

(1)

SC

1.89 1.99 2.08 2.14 2.18

PI

0.64 0.64 0.64 0.64 0.64

TC

2.62 2.83 2.98 3.07 3.14

25 SC

1.84 1.95 2.06 2.12 2.16

PI

0.69 0.69 0.70 0.70 0.70

TC

2.45 2.67 2.89 2.99 3.08

30 SC

1.78 1.90 2.02 2.08 2.11

PI

0.74 0.75 0.76 0.76 0.77

TC

2.27 2.47

2.72

2.86 2.99

35 SC

1.70 1.82

1.97

2.03 2.07

PI

0.80 0.81

0.83

0.83 0.84

TC

2.07 2.25 2.45 2.68 2.82

40 SC

1.60 1.72 1.86 1.92 1.96

PI

0.86 0.87 0.89 0.90 0.91

TC

1.79 1.96 2.16 2.38 2.57

46 SC

1.47 1.58 1.70 1.76 1.80

PI

0.94 0.96 0.98 0.99 1.00

Entering Air DB

OD Coil(

o

C)

Data

5-6

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01 Service Manual - LEX

5.4.2 Heating Mode at 7.5m Tubing Connection.

230V : Indoor Fan at High Speed.

* the above chart includes the weighted deicing infleuence.

LEGEND

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

5.5 Capacity Correction Factor Due to Tubing Length

5.5.1 Cooling

TOTAL TUBING LENGTH (One Way)

3m

7.5m

10m 15m 20m 25m 30m 40m 50m

1.02

1

0.961 0.950 --- --- --- --- ---

* Minimum recommended tubing length between indoor and outdoor units is 3m.

5.5.2 Heating

TOTAL TUBING LENGTH (One Way)

3m

7.5m

10m 15m 20m 25m 30m 40m 50m

1.05

1

0.975 0.961 --- --- --- --- ---

* Minimum recommended tubing length between indoor and outdoor units is 3m.

15 20 25

ENTERING WB

OD COIL(

o

C)

TH Pl TH Pl TH Pl

-10 1.52 0.68 1.46 0.72 1.41 0.76

-7 1.64 0.70 1.58 0.73 1.52 0.77

-2 1.74 0.70 1.68 0.75 1.62 0.79
2 2.12 0.74 2.03 0.79 1.94 0.83
6 2.99 0.79

2.90 0.85

2.80 0.90
10 3.25 0.84 3.16 0.90 3.07 0.96
15 3.51 0.87 3.42 0.94 3.34 1.00
20 3.70 0.90 3.61 0.98 3.51 1.05

ENTERING AIR DB ID COIL(

O

C)

5-7

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01Service Manual - LEX

5.6 Pressure Curves.

5.6.1 Cooling.

Suction Pressure VS.Outdoor Temp

5.0

6.0

7.0

8.0

9.0

10.0

11.0

12.0

13.0

14.0

15 20 25 30 35 40 46

Outdoor Temp.(DB oC )

Suction Pressure (Bar[g])

15/21(WB/DB ºC)
17/24(WB/DB ºC)
19/27(WB/DB ºC)
21/29(WB/DB ºC)
23/32(WB/DB ºC)

Discharge Pressure VS.Outdoor Temp

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

15 20 25 30 35 40 46

Outdoor Temp.(DB oC )

Discharge Pressure (Bar[g])

15/21(WB/DB ºC)
17/24(WB/DB ºC)
19/27(WB/DB ºC)
21/29(WB/DB ºC)
23/32(WB/DB ºC)

5-8

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01 Service Manual - LEX

5.6.2 Heating.

Suction Pressure VS.Outdoor Temp

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

12.0

-10 -5 0 5 10 15 20

Outdoor Temp.( WB oC )

Suction Pressure(Bar[g])

15 DB (ºC)
20 DB (ºC)
25 DB (ºC)

Discharge Pressure VS.Outdoor Temp

16

18

20

22

24

26

28

30

32

34

36

-10 -5 0 5 10 15 20

Outdoor Temp.( WB oC )

Discharge Pressure(Bar[g])

25 DB (ºC)
20 DB (ºC)
15 DB (ºC)

5-9

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01Service Manual - LEX

5.7 LEX12 / ONG12 R410A

5.7.1 Cooling Mode at 7.5m Tubing Connection.

230V : Indoor Fan at High Speed.

LEGEND

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

o

C)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OD – Outdoor

(1) Marked area is below standard operating limits. For operating in low ambient

conditions, refer to Optional Accessories (Chapter 15).

Entering Air WB/DB ID Coil(oC)

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

TC

3.77 3.91 4.00 4.10 4.16

15

(1)

SC

2.57 2.68 2.78 2.85 2.90

PI

0.79 0.79 0.79 0.79 0.80

TC

3.65 3.85 3.97 4.06 4.15

20

(1)

SC

2.51 2.65 2.76 2.84 2.89

PI

0.86 0.86 0.86 0.87 0.87

TC

3.45 3.73 3.92 4.04 4.14

25 SC

2.45 2.60 2.74 2.82 2.87

PI

0.92 0.93 0.94 0.94 0.95

TC

3.23 3.52 3.80 3.93 4.05

30 SC

2.37 2.52 2.68 2.76 2.81

PI

1.00 1.01 1.02 1.03 1.04

TC

2.99 3.25

3.58

3.76 3.94

35 SC

2.26 2.42

2.62

2.70 2.75

PI

1.08 1.09

1.11

1.12 1.13

TC

2.72 2.96 3.23 3.53 3.71

40 SC

2.13 2.29 2.48 2.56 2.61

PI

1.16 1.18 1.20 1.21 1.23

TC

2.36 2.58 2.84 3.13 3.38

46 SC

1.96 2.10 2.26 2.34 2.39

PI

1.27 1.29 1.32 1.34 1.35

Entering Air DB

OD Coil(

o

C)

Data

5-10

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01 Service Manual - LEX

5.7.2 Heating Mode at 7.5m Tubing Connection.

230V : Indoor Fan at High Speed.

* the above chart includes the weighted deicing infleuence.

LEGEND

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

5.8 Capacity Correction Factor Due to Tubing Length

5.8.1 Cooling

TOTAL TUBING LENGTH (One Way)

3m

7.5m

10m 15m 20m 25m 30m 40m 50m

1.02

1

0.961 0.948 --- --- --- --- ---

* Minimum recommended tubing length between indoor and outdoor units is 3m.

5.8.2 Heating

TOTAL TUBING LENGTH (One Way)

3m

7.5m

10m 15m 20m 25m 30m 40m 50m

1.05

1

0.975 0.963 --- --- --- --- ---

* Minimum recommended tubing length between indoor and outdoor units is 3m.

15 20 25

ENTERING WB

OD COIL(

o

C)

TH Pl TH Pl TH Pl

-10 2.18 0.92 2.10 0.98 2.01 1.02

-7 2.34 0.94 2.26 0.99 2.18 1.04

-2 2.49 0.95 2.41 1.01 2.32 1.06
2 3.03 1.00 2.91 1.06 2.78 1.12
6 4.27 1.07

4.15 1.15

4.00 1.22
10 4.65 1.13 4.52 1.21 4.40 1.29
15 5.02 1.18 4.90 1.27 4.77 1.35
20 5.29 1.21 5.17 1.32 5.02 1.42

ENTERING AIR DB ID COIL(

O

C)

5-11

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01Service Manual - LEX

5.9 Pressure Curves.

5.9.1 Cooling.

Suction Pressure VS.Outdoor Temp

5.0

6.0

7.0

8.0

9.0

10.0

11.0

12.0

13.0

14.0

15 20 25 30 35 40 46

Outdoor Temp.(DB oC )

Suction Pressure (Bar[g])

15/21(WB/DB ºC)
17/24(WB/DB ºC)
19/27(WB/DB ºC)
21/29(WB/DB ºC)
23/32(WB/DB ºC)

Discharge Pressure VS.Outdoor Temp

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

15 20 25 30 35 40 46

Outdoor Temp.(DB oC )

Discharge Pressure (Bar[g])

15/21(WB/DB ºC)
17/24(WB/DB ºC)
19/27(WB/DB ºC)
21/29(WB/DB ºC)
23/32(WB/DB ºC)

5-12

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01 Service Manual - LEX

5.9.2 Heating.

Suction Pressure VS.Outdoor Temp

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

-10 -5 0 5 10 15 20

Outdoor Temp.( WB oC )

Suction Pressure(Bar[g])

15 DB (ºC)
20 DB (ºC)
25 DB (ºC)

Discharge Pressure VS.Outdoor Temp

16

18

20

22

24

26

28

30

32

34

36

38

-10 -5 0 5 10 15 20

Outdoor Temp.( WB oC )

Discharge Pressure(Bar[g])

25 DB (ºC)
20 DB (ºC)
15 DB (ºC)

5-13

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01Service Manual - LEX

5.10 LEX14 / ONG14 R410A

5.10.1 Cooling Mode at 7.5m Tubing Connection.

230V : Indoor Fan at High Speed.

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

(1) Marked area is below standard operating limits. For operating in low ambient

conditions, refer to Optional Accessories (Chapter 15).

Entering Air WB/DB ID Coil(oC)

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

TC

4.45 4.61 4.72 4.83 4.90

15

(1)

SC

2.89 3.01 3.13 3.21 3.27

PI

0.93 0.93 0.93 0.93 0.94

TC

4.30 4.54 4.68 4.79 4.89

20

(1)

SC

2.83 2.98 3.11 3.20 3.26

PI

1.01 1.01 1.02 1.02 1.02

TC

4.07 4.40 4.62 4.76 4.88

25 SC

2.76 2.93 3.09 3.18 3.23

PI

1.09 1.10 1.10 1.11 1.12

TC

3.81 4.15 4.48 4.64 4.78

30 SC

2.67 2.84 3.02 3.11 3.17

PI

1.18 1.19 1.20 1.21 1.22

TC

3.53 3.83

4.22

4.43 4.64

35 SC

2.54 2.72

2.95

3.04 3.09

PI

1.27 1.29

1.31

1.32 1.33

TC

3.21 3.49 3.81 4.16 4.38

40 SC

2.39 2.58 2.79 2.88 2.94

PI

1.37 1.39 1.41 1.43 1.44

TC

2.78 3.04 3.34 3.69 3.98

46 SC

2.21 2.36 2.54 2.63 2.69

PI

1.49 1.52 1.55 1.57 1.59

Entering Air DB

OD Coil(

o

C)

Data

5-14

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01 Service Manual - LEX

5.10.2 Heating Mode at 7.5m Tubing Connection.

230V : Indoor Fan at High Speed.

* the above chart includes the weighted deicing infleuence.

LEGEND

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

5.11 Capacity Correction Factor Due to Tubing Length

5.11.1 Cooling

TOTAL TUBING LENGTH (One Way)

3m

7.5m

10m 15m 20m 25m 30m 40m 50m

1.02

1

0.984 0.946 --- --- --- --- ---

* Minimum recommended tubing length between indoor and outdoor units is 3m.

5.11.2 Heating

TOTAL TUBING LENGTH (One Way)

3m

7.5m

10m 15m 20m 25m 30m 40m 50m

1.03

1

0.995 0.971 --- --- --- --- ---

* Minimum recommended tubing length between indoor and outdoor units is 3m.

15 20 25

ENTERING WB

OD COIL(

o

C)

TH Pl TH Pl TH Pl

-10 2.31 0.90 2.22 0.96 2.13 1.01

-7 2.49 0.93 2.40 0.98 2.31 1.03

-2 2.64 0.94 2.55 1.00 2.46 1.05
2 3.21 0.98 3.08 1.05 2.95 1.11

64.531.06

4.40 1.13

4.25 1.20
10 4.93 1.12 4.80 1.19 4.66 1.28
15 5.32 1.16 5.19 1.26 5.06 1.33
20 5.61 1.20 5.48 1.30 5.32 1.40

ENTERING AIR DB ID COIL(

O

C)

5-15

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01Service Manual - LEX

5.12 Pressure Curves.

5.12.1 Cooling.

Suction Pressure VS.Outdoor Temp

5.0

6.0

7.0

8.0

9.0

10.0

11.0

12.0

13.0

14.0

15 20 25 30 35 40 46

Outdoor Temp.(DB oC )

Suction Pressure (Bar[g])

15/21(WB/DB ºC)
17/24(WB/DB ºC)
19/27(WB/DB ºC)
21/29(WB/DB ºC)
23/32(WB/DB ºC)

Discharge Pressure VS.Outdoor Temp

10

12

14

16

18

20

22

24

26

28

30

32

34

36

38

40

15 20 25 30 35 40 46

Outdoor Temp.(DB oC )

Discharge Pressure (Bar[g])

15/21(WB/DB ºC)
17/24(WB/DB ºC)
19/27(WB/DB ºC)
21/29(WB/DB ºC)
23/32(WB/DB ºC)

5-16

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01 Service Manual - LEX

5.12.2 Heating.

Suction Pressure VS.Outdoor Temp

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

-10 -5 0 5 10 15 20

Outdoor Temp.( WB oC )

Suction Pressure(Bar[g])

15 DB (ºC)
20 DB (ºC)
25 DB (ºC)

Discharge Pressure VS.Outdoor Temp

16

18

20

22

24

26

28

30

32

34

36

38

-10 -5 0 5 10 15 20

Outdoor Temp.( WB oC )

Discharge Pressure(Bar[g])

25 DB (ºC)
20 DB (ºC)
15 DB (ºC)

6-1

SOUND LEVEL CHARACTERISTICS

Revision Y06-01Service Manual - LEX

6. SOUND LEVEL CHARACTERISTICS

6.1 Sound Pressure Level

6.2 Sound Pressure Level Spectrum

(Measured as Figure 1)

FAN SPEED LINE

HI
ME
LO

0.8m

Mic.

Unit

Wall

LEX 12 RC LEX 14 RC

LEX 7 RC LEX 9 RC

Figure 1

6-2

SOUND LEVEL CHARACTERISTICS

Revision Y06-01 Service Manual - LEX

6.3 Outdoor units

6.4 Sound Pressure Level Spectrum

(Measured as Figure 2)

ONG 7 RC Cooling ONG 7 RC Heating

ONG 9 RC Cooling ONG 9 RC Heating

Mic.

Unit

Ground

Figure 2

6-3

SOUND LEVEL CHARACTERISTICS

Revision Y06-01Service Manual - LEX

ONG 12 RC Cooling ONG 12 RC Heating

ONG 14 RC Cooling ONG 14 RC Heating

7-1

ELECTRICAL DATA

Revision Y06-01Service Manual - LEX

7. ELECTRICAL DATA

7.1 Single Units

MODEL LEX 7 LEX 9

Power Supply

To indoor To outdoor To indoor To outdoor

1PH-230V-50Hz 1PH-230V-50Hz

Max Current, (A) 4.3 6.0

Circuit Breaker,(A) 10.0 10.0

Power Supply Wiring.
(No. x Cross Section mm

2

)

3 x 1.5 mm

2

3 x 1.5 mm

2

Interconnecting Cable RC
Model
(No. x Cross Section mm2)

5 x 1.0 mm2 + 2 x 0.5 mm

2

(OCT sensor)

6 x 1.0 mm2 + 2 x 0.5 mm

2

(OCT sensor)

5 x 1.0 mm2 + 2 x 0.5 mm

2

(OCT sensor)

6 x 1.0 mm2 + 2 x 0.5 mm

2

(OCT sensor)

Interconnecting Cable ST Model
(No. x Cross Section mm2)

4 x 1.0 mm

2

5 x 1.0 mm2 4 x 1.0 mm2 5 x 1.0 mm

2

MODEL LEX 12 LEX 14

Power Supply

To indoor To outdoor To indoor To outdoor

1PH-230V-50Hz 1PH-230V-50Hz

Max Current, (A) 8.2 9.5

Circuit Breaker,(A) 15.0 15.0

Power Supply Wiring.
(No. x Cross Section mm

2

)

3 x 1.5 mm

2

3 x 1.5 mm

2

Interconnecting Cable RC
Model
(No. x Cross Section mm2)

5 x 1.5 mm2 + 2 x 0.5 mm

2

(OCT sensor)

6 x 1.5 mm2 + 2 x 0.5 mm

2

(OCT sensor)

5 x 1.5 mm2 + 2 x 0.5 mm

2

(OCT sensor)

6 x 1.5 mm2 + 2 x 0.5 mm

2

(OCT sensor)

Interconnecting Cable ST Model
(No. x Cross Section mm2)

4 x 1.5 mm

2

5 x 1.5 mm2 4 x 1.5 mm2 5 x 1.5 mm

2

NOTE

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

8-1

WIRING DIAGRAMS

Revision Y06-01Service Manual - LEX

8. WIRING DIAGRAMS

NOTE

Wiring diagram lables as shown on units.

8.1 Indoor Unit: LEX 7,9,12,14 fully feature

8.1.1 Indoor Unit: LEX 7,9,12,14 basic

8-2

WIRING DIAGRAMS

Revision Y06-01 Service Manual - LEX

8.2 Outdoor Unit: ONG7 RC R410A

8.3 Outdoor Unit: ONG7ST, 9ST/RC, 12ST/RC, 14ST/RC R410A

9-1

ELECTRICAL CONNECTIONS

Revision Y06-01Service Manual - LEX

9. ELECTRICAL CONNECTIONS

9.1 LEX 7, 9, 12, 14 R410A

10-1

REFRIGERATION DIAGRAMS

Revision Y06-01Service Manual - LEX

10. REFRIGERATION DIAGRAMS

10.1 Heat Pump Models

10.1.1 LEX 7 R410A

10-2

REFRIGERATION DIAGRAMS

Revision Y06-01 Service Manual - LEX

10.1.2 LEX 9, 12, 14 R410A

11-1

TUBING CONNECTIONS

Revision Y06-01Service Manual - LEX

11. 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.

12-1

CONTROL SYSTEM

Revision Y06-01Service Manual - LEX

12. CONTROL SYSTEM LEX 7-14 LED BASIC MODEL

12.1 Electronic Control

12.1.1 Introduction

The electronic control information is designed for service applications, and is common
to the following groups of air-conditioners:

• ST/ RC group -Cooling only / cooling and heating by heat pump.

• SH group -Cooling and heating by heat pump and supplementary

heater.

• RH group -Cooling, heating by heaters only.

12.1.2 Jumpers Settings

GROUP J6 Setting J2 Setting

ST / RC Open Open

SH Closed Open

RH Closed Closed

12-2

CONTROL SYSTEM

Revision Y06-01 Service Manual - LEX

12.2 Legend

AC - Alternate Current

A/C - Air-Conditioner
ANY - ON or OFF status
CLOCK - ON/OFF Operation Input, (dry contact)
COMP - Compressor
CPU - Central Processing Unit
ELUM - Extended Louver Upward Movement (Software Jumper)
E²PROM, EEP - Erase Enable Programmable Read Only Memory
HE - Heating Element
HPC - High Pressure Control
H/W - Hardware
ICP - Indoor Condensation Pump
ICT - Indoor Coil Temperature (RT2) sensor
IF, IFAN - Indoor Fan
IR - Infra Red
LEVEL1 - Normal Water Level
LEVEL2/3 - Medium/High Water Level
LEVEL4 - Overflow Level
Max - Maximum
Min - Minimum
min - Minute (time)
NA - Not Applicable
OCP - Outdoor Condensation Pump
OCT - Outdoor Coil Temperature (RT3) sensor
OF, OFAN - Outdoor Fan
OPER - Operate
Para. - Paragraph
RAT - Return Air Temperature (RT1) sensor
RC - Reverse Cycle (Heat Pump)
R/C - Remote Control
RCT - Remote Control Temperature
RH - Resistance Heater
RT - Room Temperature (i.e. RCT in IFEEL mode, RAT otherwise)
RV - Reversing Valve
SB, STBY - Stand-By
sec - Second (time)
Sect - Section
SH - Supplementary Heater
SPT - Set Point Temperature
ST - Standard (a Model with Cooling Only)
S/W - Software
TEMP - Temperature
W/O - Without

WVL - Water Valve
ΔT - The difference between SPT and RT.

in Heat Mode: ΔT = SPT-RT
in Cool/Dry/Fan Mode: ΔT = RT-SPT

12-3

CONTROL SYSTEM

Revision Y06-01Service Manual - LEX

12.4 General functions

12.4.1 COMP operation

For each Mode including POWER OFF & SB, a Min time delay of 3 min

before COMP restarting, excluding DEICING Mode

The Min operation time of COMP under different operating conditions is

Operation Mode

Min operation time of

COMP

Heat, Cool or Auto Modes 3 min.

Fan, Dry, Overflow, Protection modes, or mode change ignored

12.4.2 IFAN operation

• Min time interval between IFAN speed change in AUTOFAN Mode, is 30 sec.

• Min time interval between IFAN speed change in H/M/L Mode is 1 sec.

• IFAN speed in Heat/Cool Autofan Mode is determined according to the following table:

ΔT IFAN Speed

ΔT ≥ 2 HIGH

2 ≥ ΔT ≥ 1 MED

1 ≥ ΔT LOW

where in Heat Mode: ΔT = SPT-RT
in Cool Mode: ΔT = RT-SPT

Note:

• In Heat Mode, the rules in section 4.0.3 have the higher priority.

• The table above can be represent by a hysteresis curve which

will minimize the switching of the IFAN relay and will minimize the
change in IFAN speed:

T [oc]

L

M

H

IFAN speed

321

12.4.3 OFAN operation

• Min time interval between OFAN ON/OFF state change is 30 sec.

• In general, OFAN starts together with COMP.

12.4.4 HE operation

• Minimum Heaters ON or OFF time is 30 sec.

• Heaters can be activated only if IFAN is on.

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12.4.5 Protections

• High pressure protection is applicable to all operating modes.

• Deicing control is valid in Heat and Auto Heat Mode only.

• Defrosting control is valid in Dry, Cool, Heat and Auto Modes.

• No reset after protection modes.

12.4.6 Thermistors operation

• Return air Temp. is detected by RAT (RT1) in normal Mode, or by RCT (R/C sensor)
in I-FEEL Mode.

• Indoor Coil Temp. is detected by ICT (RT2).

12.4.6.1 Definition of thermistor faults:

a. Thermistor is disconnected ­ The thermistor reading is below -30

o

c.

b. Thermistor is shorted ­ The thermistor reading is over 75

o

c.

c. Thermistor Temp reading doesn’t change (irrelevant for RT1) -

(i) This test is performed only once after a unit is switched from

OFF/STBY to operation. At the first occurrence of 10 min
continuous COMP operation, the current ICT & OCT are
compared with those when the COMP was switched from OFF
to ON 10 min before. If the ΔT is less than 3

o

c, the thermistor is

regarded as defective.

(ii) The ICT and OCT no-change error can be disabled together by

connecting a4.7 kohm resistor (5%) to the OCT connector. These
resistors are equivalent to a thermistor at 43+/-1

o

c and 48+/-1oc

respectively.

(iii) Connecting a 4.7k resistor to the ICT connector will disable the

ICT no-change error only.

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12.4.6.2 Cases for disabling thermistor short/disconnected detection

i. The detection of thermistor faults (a) and (b) above, are disabled when Deicer

Protection is started. The detection will be enabled again only after (1) the
deicing is completed, and (2) COMP has been restarted and operated for 30
sec.

ii. When all the following conditions are fulfilled:

a. 4.7K Ohm resistor is connected on the OCT
b. IFAN is OFF
c. Compressor is ON
d. ICT < -30 (disconnected)
This condition come to detect and prevent IFAN operation in Deicer in multi spilt
units.

12.4.6.3 Handling the thermistor faults in a COMP unit

i. ICT/OCT thermistor is disconnected or shorted -

The invalid thermistor temperature is replaced by 43oc, so that the unit
can continue the normal operation. All protections related to that faulty
thermistor will be disabled. For example, in case of any ICT fault, the ICT
high pressure protection in Heat Mode and ICT defrost protection in Cool
Mode will not operate anymore. The same is also applied to the OCT fault.

ii. RAT thermistor is disconnected or shorted –

The RAT will be derived from the ICT by using the equations :
Heat Mode: RAT=ICT/2.3

Cool Mode RAT=ICT*4

Notes:

• In case of any thermistor failure, the STBY LED will be blinking until the
fault condition is corrected.

• User can use the system diagnostics function to find out the nature of
the thermistor faults.

i. RAT thermistor is disconnected or shorted –

System will operate continuously in the last IFAN & WVL status when
turned ON.

Notes:

• As in the COMP unit, the STBY LED will be blinking to indicate a
thermistor fault. And, the user can use the system diagnostics function
to find out the nature of the fault.

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12.5 Cooling Mode - General

1) Room Temperature, RT, is detected by

• RAT in normal operation, or

• RCT (R/C sensor) in I-FEEL mode.

2) The resolution of RT is 1oc.

• RT is activating COMP/WVL if (RT > SPT), and

• RT is stopping COMP/WVL if (RT =< SPT).

3) Indoor Coil Temp is detected by ICT (RT2).

4) Outdoor Coil Temp is detected by OCT (RT3).

5) A WVL-RC/SH will work in Cooling Mode when

• ICT < 16

o

c in general (see Sect 2.2.2 for details), and

• Unit is not operating in Fan Mode.

6) OFAN OPERATIONS

• OFAN starts together with COMP in general.

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12.5.1 Cooling

Mode: Cool, Auto (at Cooling)
Temp: Selected desired temperature.
Fan: HIGH, MED, LOW
Timer: Any
I Feel: On or Off

Control function

Maintains room temp at desired level by comparing RT and SPT.

(RT - SPT) [oc]

+3

+2

+1

0

-1

-2

ON

OFF

ON

OFF

USER FAN SPEED

ON

OFF

COMP

(WVL)

OFAN

IFAN

RV

Note:

1) IFAN is always running at High, Medium or Low speed selected by user.

2) In IFEEL mode, the Room Temperature (RT) is the RCT from a R/C. Otherwise, the
RT is the RAT from the Room Thermistor.

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12.5.2 Cooling with Autofan

Mode: Cool, Auto (at cooling)
Temp: Selected desired temperature
Fan: Auto
Timer: Any
I Feel: On or Off

Control function

Maintains room temp at desired level and controls the IFAN speed for optimal comfort.

(RT - SPT) [oc]

+3

+2

+1

0

-1

-2

ON

OFF

ON

OFF

H

L

M

ON

OFF

COMP
(WVL)

OFAN

IFAN

RV

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12.6 Heating Mode

12.6.1 Heating Mode - General

• In heating Mode, temp. compensation schedule will be activated for wall mounted

units.

SPT [oc]

Add to SPT

I-FEEL ON I-FEEL OFF

18 ≤ SPT ≤ 27 0

o

c +2 oc

27 < SPT ≤ 30 0

o

c+3

o

c

Notes :

• No compensation will be activated in Forced operation modes

12.6.2 IF operating rules

• As a general rule for RC and SH groups, when COMP is ON, excluding

protection modes, IFAN will be switched ON if

• ICT > 35oc or

at the IFTC 30 sec after the COMP is switched ON. In
this case, the IFAN will be started at low speed.

Notes :

1) In SH or RC group, if HE is set to OFF due to low ICT, IFAN will be

switched to LOW and will be turned OFF after 30 sec.

2) An exception to this rule (4.0.3.a) is the Back-up mode for SH.

• In RC and SH groups, whenever COMP & HE are both

OFF, excluding protection modes, IFAN operation will be according

to the following:

In other models IFAN will operate in low speed for 30 sec and then stop. If

COMP is OFF for more than 3 minutes and IFEEL Mode is inactive, IFAN will
operate in low speed according to the following graph:

IFAN Speed

Any

Low

Stop

30 35 40

EMD/ELD

EMD/ELD

ICT [oc]

15 20 25

General :
For WAX :

SPT+4 SPT+6 ICT

[

o

c

]

ON

OFF

IFAN (Low Speed)

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12.6.3 HE operation

• For all Groups, HE can be ON only when IFAN is ON.

• For all Groups, HE switches to OFF when ICT > 50

o

c, and is activated

again when ICT ≤ 45oc.

• In SH or RC group, HE operation is limited by the following graph:

• Back-up mode for SH group

After COMP has been working for 5 minutes, HE & IFAN are activated even
if the ICT is still below 35

o

c. This situation is called Back-up Mode. Both
HE & IFAN will work in Back-up Mode until the ICT reaches 35oc. Then, the
operation goes on in the usual mode .

HE

ON

OFF

30

45 50

ICT [oc]

15

General :
For WAX :

35
20

40

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12.6.4 Heating, RC or SH Group

Mode: Heat, Auto (at heating)
Temp: Selected desired temperature
Fan: HIGH, MED, LOW
Timer: Any
I Feel: On or Off

Control function
Maintains room temp. at desired level by comparing RAT or RCT to SPT.

(RT - SPT) [oc]

+2

+1

0

-1

-2

-3

ON

OFF

ON

OFF

H/M/L

OFF

L

ON

OFF

Note 1 Note 2

COMP
(WVL)

HE1

HE2

IFAN

ON

OFF

RV

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12.6.5 Heating, RC or SH Group with Autofan

Mode: Heat, Auto (at heating)
Temp: Selected desired temperature
Fan: Auto
Timer: Any
I Feel: On or Off

Control function
Maintains room temp at desired level by controlling COMP, IFAN and OFAN.

(RT - SPT) [oc]

+2

+1

0

-1

-2

-3

ON

OFF

ON

OFF

H

OFF

L

M

ON

OFF

Note 1 Note 2

COMP
(WVL)

HE1

HE2

IFAN

RV

ON

OFF

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12.6.6 OFAN operation is controlled by the graph below when

1. (RAT ≥ SPT – 2oc), AND

2. (ICT ≥ 45

o

c), AND

3. (COMP is ON)

Otherwise, OFAN runs together with COMP.

OCT [oc]

+3

+2

+1

0

-1

OFAN

ON

OFF

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12.7 Automatic Cooling or Heating

12.7.1 Automatic Cooling or Heating - General

• Switching-temperature between Cooling and Heating is SPT ± 3oc.

• Autofan in Automatic Cooling and Heating Mode will activate “Cooling

with Autofan Mode” and “Heating with Autofan Mode” respectively.

• When the Auto Mode is started with SPT +/-0

o

c, the unit will not select
Auto Heat or Auto Cool mode immediately. Instead, the unit will be in
a temporary Fan Mode with IFAN operating at low speed.
The proper Auto Heat mode or Auto Cool will be started whenever the RT
reaches SPT-1oc or SPT+1oc respectively.

• For RC & SH units, Mode change between Auto Heat & Auto Cool

Modes is possible only after the COMP has been OFF during the
last T minutes.

Mode Change time, T
Auto Cool to Auto Heat 3 min
Auto Heat to Auto Cool 4 min

• When unit is changed form Cool/Dry mode to Auto Mode, the unit
will continue to operate at (Auto) Cool Mode until the conditions for
switching from Auto Cool to Auto Heat are satisfied.

Similarly, when unit is changed from Heat Mode to Auto Mode, the

unit will continue to operate at (Auto) Heat Mode until the conditions
for switching from Auto Heat to Auto Cool are satisfied.

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12.7.2 Auto Cooling or Heating, RC or SH Groups

Mode: Auto
Temp: Selected desired temperature
Fan: Any
Timer: Any
I Feel: On or Off

Control function
Maintains room temp at desired level by selecting between cooling and heating modes.

(RT - SPT) [oc]

+3

+2

+1

0

-1

-2

-3

ON

OFF

ON

OFF

H/M/L/OFF

L/OFF

ON

OFF

ON

OFF

COMP

& OFAN

HE1

HE2

IFAN

RV

H/M/L/OFF

L/OFF

USER FAN SPEED H/M/L/OFF

L/OFF

Auto Cool Mode Auto Heat Mode

> 4 min > 3 min

> 3 min > 2 min

(3) (3)

(4)

(4)

(5)

Auto Heat Mode

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12.8 Dry Mode

12.8.1 Dry, ST or RC group

Mode: Dry
Temp: Selected desired temp
Fan: Low (automatically selected by software)
Timer: Any
I FEEL: Any

Control function
Reduce room humidity with minimum temp. fluctuations by operating in Cool Mode with
low speed IFAN.

Notes :

• When Dry is ON, the COMP is forced OFF for 3.5 min (longer than the
3 min Min COMP-Off time) after every 15 min of continuous COMP
operation.

• When Dry is OFF, the COMP is forced ON for 6 min (longer than the 3
min Min COMP-On time) after every 15 min of continuous COMP OFF
time.

• When Dry is changed from ON to OFF or vice versa, the limits
mentioned in (1) & (2) are ignored. The COMP operation is only
controlled by the 3 min Min OFF time and 1 min Min ON time.

• In Dry Mode, IFAN is LOW when COMP is ON, and is OFF when
COMP is OFF.

DRY

(RT - SPT) [oc]

+2

+1

0

-1

-2

ON

OFF

ON

OFF

LOW

OFF

DRY-ON

DRY-OFF

ON

OFF

Time [min]

10

20

30

40 50

Max 15 minutes

3.5

min

Note1

6 min

Note 2

COMP

& OFAN

HE1

& HE2

IFAN

RV

Max 15 minutes

5 minutes COMP

ON time

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12.9 Protection

12.9.1 Cooling Mode Protections

Indoor Coil Defrost

Mode: Cooling, Dry, Auto
Temp: Selected desired temp.
Fan: Any
Timer: Any
I Feel: On or Off

Control Function
Protect the indoor coil from ice formation at low ambient temperature.

t1 = 5 min minimum for each COMP starting
t2 = OFAN cycling (alternate between ON and OFF every 30 sec) for 20 min
maximum
t3 = COMP and OFAN stop for 10 min minimum

Notes:

• When J7 is closed (connected), OFAN cycling is cancelled and the
set temperature for COMP & OFAN cut-out and cut-in are changed.
COMP & OFAN are forced OFF when ICT =< -6

o

c, and are kept OFF

until ICT > 14

o

c.

• For WAX model, the defrost processes is simpler. When J7 is open,
COMP & OFAN are forced OFF when ICT =< -1

o

c, and are kept OFF
until ICT > 5oc. When J7 is closed, the WAX defrosting process is the
same as that of the other models (R.H.S. of the graph above). In both
cases, the ICT checking in t2 and t3 are not applied.

ICT [oc]

+2

ON

OFF

ON

OFF

t1 t2 t3

COMP

OFAN

+1

+5

+14

0

-1

-6

ON

OFF

IFAN

J7 OPEN J7 CLOSED

t1 t1

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12.3.2 High Pressure Protection

Mode: (Auto) Cooling or Dry
Temp: Selected desired temp.
Fan: Any
Timer: Any
I Feel: On or Off

Control Function
To protect the COMP from the high pressure built-up in the outdoor coil during normal
cooling operation, by switching OFF the IFAN and COMP.

OCT [oc]

Any

OFF

Any

ON

Any

Blink

ON

COMP

OFAN

IFAN

OPER

LED

52

55

61

66

L

COMP is forced OFF

OFAN is forced ON

IFAN forced

to LOW

68

OFAN follow operation of

COMP

COMP is forced OFF

OFAN is forced ON

For all models except WAX & P2000 For WAX & P2000 models

Note:

• The ICT is also monitored during Cool and Dry mode, in case the RV control circuit
is faulty. Whenever ICT reaches 70oc, which indicates a high pressure in the indoor
coil, the COMP will be forced off automatically. The COMP can be turned on again only
after the ICT is under 70oc again and after the 3 min COMP ON delay time. The OPER
LED will not blink in this case.

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12.9.3 Heating Mode Protections

Outdoor coil Deicing (excluding RH Group)

Mode: Heating, Auto (at heating)
Temp: Selected desired Temp
Fan: Any
Timer: Any
I FEEL: Any

Control function
Protects the Outdoor coil from ice formation by controlling COMP & RV operation.

Scope
This new deicer is designed to operate at extreme temp conditions. The deicing cycle

could be triggered from:

1. OCT temp and time between two consecutive deicing cycles.

2. Detection of ice forming by change of the OCT temp.

Both algorithms adjust the time between deicing cycles to optimize the A/C
performance. The algorithm will automatically increase the time between deicing cycles
and reduce the deicing cycle as needed.

The algorithm uses EEPROM data to operate.

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Deicing procedure

OCT [oc]

ON

OFF

ON

OFF

ON

L

ANY

COMP

OFAN

RV

IFAN

DST

(DDT)

0

12

OFF

HEs are forced ON

DOC

ANY

ON

HE

36s 36s

DT

30s

max 12 min.

Note 3

DI (note 1)

DI (note 2)

30s

3 min 3 min

IFAN

OFF

ANY

HE

OFF

ANY

all SH units

except WAX

RC or WAX units

HEs are forced OFF

IFAN is forced to Low Speed

BLINK

ON

OPER

LED

Notes :

• At the first COMP activation after SB or OFF, if (OCT < 0oc), then DI = 10
min, else DI = 40 min.

• In the following Deicing cycles, the time interval between two Deicing
cycles activation is between 30 to 80 min (refer to the flow chart).

• For RC group, HEs are forced OFF. IFAN operation is as in Heat
Mode, Sect 4.0.3.a, i.e. IFAN will be set to OFF when ICT<30

o

c.

For WAX, the IFAN is simply forced OFF.

• For SH group, HEs are forced ON and IFAN is forced to operate in Low

speed, regardless of the ICT and difference between RAT & SPT.

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12.9.4 High pressure protection (excluding RH Group)

Mode: (Auto) Heating
Fan: Any
Timer: Any
I Feel: On or Off

Control Function
Protect the Compressor from high pressure by switching OFF the OFAN and COMP.

ICT [oc]

Any

Off

Any

Off

COMP

OFAN

52

55

61

66

COMP is forced OFF

67

OFAN is force

Off

COMP is forced OFF

For all models except WAX For WAX model

ON

BLINK

OPER

LED

Notes:

• IFAN, HE1 and HE2 will be activated according to the relevant

Heating Mode Sect.

• In case of any malfunction in the relay control circuit, the OCT is also

monitored during heating mode. Whenever OCT reaches 70

o

c, which indicates
a high pressure in the outdoor coil, the COMP will be forced off automatically.
The COMP can be turned on again only after the 3 min COMP ON delay and the
OCT is under 70oc. The OPER LED will not blink in this case.

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12.10 Timer

Mode: Any
Temp. Selected desired temp
Fan: Any
Timer: Timer On, Timer Off
I Feel: On or Off

Control function

• Starts or stops the unit operation after pre-set time. If RC-1 is used,
the timer setting will be (0.5 - 24 Hr) from the moment the timer is set.
The minimum resolution is 30 minutes.

If RC-2 or later version of remote controls is used, the timer

setting will be (0:00 - 23:50) real time with 10 minutes resolution.

• After power failure, all pre-set timers are cleared. The system is
forced to STBY mode and the Timer LED indicator is blinked to
indicate the situation. The LED keeps blinking until the timer settings
can be reloaded from a R/C message.

Note: If all timers are inactive, the system will not be forced
OFF after the power failure. The last OPER/STBY status will
be loaded from the EEP instead.

• When the A/C receives any valid message from a R/C, the current
ON/OFF timer settings will be replaced by the new timer settings in
the R/C message.

Note: The following timer related operations will not affect the
A/C operating mode (Heat/Cool/Auto/Dry/Fan) setting.

• Set ON/OFF timer

• Clear ON/OFF timer

• R/C ON Timer is time-up

• R/C OFF Timer is time-up

E.g. When a STBY A/C unit (with Cool Mode setting in its EEP) is

turned on by the ON-TIMER of a R/C with heat mode setting,
the A/C will start in Cool Mode.

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12.11 Forced Operation

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

Forced operation

mode

Pre-set Temp for :

WMF, WMN, WNG models

Cooling 22°C

Heating 28°C

Note:

• While under the forced operation, the temperature compensation
schedule.

• The forced operation is activated when the mode button on the
Display Board is used to switch the unit to Cool or Heat mode.

• The IFAN is always set to Autofan Speed in forced operation.

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12.12 Sleep Mode

Mode: Any
Temp: Set – desired temperature selected
Fan: Any
Timer: Interact with Sleep Timer as described in sect 12.2
I Feel: On or Off

The Sleep mode is activated by using the sleep button on the R/C. In Sleep Mode,
the unit will automatically adjust the SPT to turn up/down the room temperature (RT)
gradually to provide maximum comfort to the user in sleep.

Sleep is treated as TIMER function. Therefore, the TIMER LED is activated similar to
TIMER function.

12.12.1 Adjustment in Sleep Mode

1. in cool, auto cool or dry modes, the SPT adjustment is positive (from 0 to +3oc).

2. In heat or auto heat modes, the SPT adjustment is negative (from 0 to -3

o

c).

3. In other modes, there is no SPT adjustment.

4. The SPT adjustment is cancelled when the Sleep mode is cancelled.

Note: If Off-timer is active, the unit may go to SB before or after 7 hours of

sleep operation.

SPT

Time [Hr]

485326

Start

Sleep

7

RT

SPT-1

SPT-2

SPT-3

SPT+2

SPT+1

SPT+3

1

7 Hours Sleep operation

for Normal Sleep Mode

Unit is turned to SB

after Sleep

Cool, Dry modes

Heat mode

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12.12.2 Time adjustment in Sleep Mode

The user can make use of the Off-Timer to extend the Sleep Time from 7 hours to 12
hour (max). The operation of the new “Extended Sleep Mode” is illustrated by the
graphs below.

Case 1 is the Standard Sleep Mode, which is the only sleep mode in previous version
of MCU. The A/C unit simply works for 7 hours, then goes to SB.

Case 2 is the new Extended Sleep Mode. If an active Off-Timer is set to turn off the
A/C between 7-12 hour, relative to the starting of Sleep, the Sleep time is extended.

And, instead of going to SB at the 7th hour, the A/C will work until reaching the Off-time.
Case 3 is an exception to case 2. The Sleep Mode will not be extended to the Off-Time

when the Off-Timer is preceded by an On-Timer, which is also between 7-12 hour.

Oper

Time [Hr]

48101226

Start

Sleep

7

Case 1 : Standard Sleep Mode

Condition : Off-timer is not set or is beyond 12 hour.

SB

Oper

Time [Hr]

48101226

Start

Sleep

7

Case 2 : Extended Sleep Mode

Condition : Off-timer is set at 7-12 hour.

SB

Off-timer

Oper

Time [Hr]

48101226

Start

Sleep

7

Case 3 : Exception to Case 2

Condition : Off-timer is set at 7-12 hour

On-timer is set at 7-12 hour and before Off-timer

SB

Off-timerOn-timer

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12.13 Clogged Air Filter

Filter LED ON after 512 HR.

Filter LED is turned OFF, and the Filter Timer is restarted by pressing the reset button.

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12.14 Controller Self-Test Procedure

12.14.1 By Shorting Test Jumper J1

RC/ST TEST

MODEL

CONFIGURATION

TEST

STEP MOTOR TEST

FREQUENCY

TEST

LEDS OFF

LEDS ON TEST

AUTO RELAY

TEST

SHORT JUMPER

J1

(CONTROL PCB)

PRESS ON

POWER

BUTTON

PRESS ON

MODE BUTTON

INDOOR FAN
SPEED TEST

SELF-TEST FLOW CHART

Step 1

Step 2

Step 3

FOR CONTROLLER (VERSION 4V5 OR HIGHER)

COOL

HEAT

COMPRESSOR

OUTDOOR FAN

R.V.

LOW

MEDIUM

HIGH

TIMER

OPERATE

STANDBY

BUZZER TEST

(ONE BEEP SOUND)

REMOTE CONTROL

TO CPU COMUNICATION

(TWO BEEPS SOUNDS)

THERMISTOR ANALOG

VOLTAGE CHECKING

EEPROM MEMORY

TEST

END OF SELF

TEST

PRESS ON RESET

BUTTON

PRESS ON FAN

BUTTON ON THE

REMOTE CONTROL

PRESS ON MODE

BUTTON

PRESS ON MODE

BUTTON

Step 4

Step 5

Step 6

Step 7

Step 8

DISCONNECT

JUMPER

J1

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12.14.2 By Remote Control Settings:

a. 1: TURNING ON THE POWER.

Turn ON the power, make sure that the unit is in operation.

b. STEP 2 : ENABLE SELF-TEST MODE

• Use the remote control to send the first settings to display / indoor unit
HEAT mode, HIGH IFAN, set temperature to 16 ºC, no I-FEEL Sleep or
any other timer settings are needed.

• Cover the IR transmitter components in the remote control so that it will
not transmit the signals to the indoor unit display.

• Use the remote control to send the second settings to display / indoor unit
COOL mode, LOW IFAN, no I-FEEL Sleep or any other timer settings.

• Uncover the remote control IR transmitter and change the temperature
settings. If the display/indoor unit receive the settings properly the
following steps will start:

c. STEP 3: MODEL SETTING CONFIRMATION

• The STAND-BY and COOL LEDS will indicate the operation mode as

follows:

OPERATION MODE STAND-BY LED COOL LED

ST ON OFF

RC OFF OFF

SH OFF ON

RH ON ON

• Testing the Model configuration. Selected by the COMP, STAND-BY,

TIMER LEDS and FILTER will indicate the model configuration as follows
(the relevant line for this manual is highlighted):

MODEL COMP OPERATE LED TIMER LED FILTER LED

WNG ON OFF OFF OFF
WMN1 ON ON OFF ON
WMN4 OFF OFF ON OFF

WMN2/WHX OFF ON OFF ON

WMN3 OFF ON ON ON

In this term the step motor will turn to HOME POSITION.

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d. STEP 4 : AUTO LED WALK TEST.

• All the LEDS will turn OFF.

• All the LEDS will turn ON for 1 second one by one in the following

sequence:

STAND-BY  OPERATE  TIMER  FILTER  COOL  HEAT.

• In PRX all the LEDS will turn ON for 1 second one by one in the following
sequence : 18 °c  20 °c  22 °c  24 °c  26 °c  28 °c  30 °c 
High IFAN  Auto IFAN  Med IFAN  Low IFAN  STAND-BY
TIMER  FILTER COOL HEAT.

e. STEP 5: AUTO REALY WALK TEST:

• All relays will energize one by one in the following sequence:

COMPRESSOR  OUTDOOR FANR. V.  HEATER 1  HEATER 2
 INDOOR WATER PUMP  SWING or OUTDOOR WATER PUMP 
INDOOR FAN: LOW  MID  HIGH.

• When the relay walk test is completed, the next test will start
automatically.

f. STEP 6: FREQUENCY TESTING:

• If the frequency measuring process fails the COOL LED will turn ON.
In order to move to the next step, press ON/OFF button on the remote
control.

g. STEP 7: INPUT TEST.

• The test purpose is to check the analog real time indicators (thermistors,
LEVEL and clock) according to the table below.

LED Indicator Condition for LED to be ON

STBY LED Room thermistor ≠ 25°c
OPER LED Indoor coil thermistor ≠ 25°c
TIMER LED Outdoor coil thermistor ≠ 25°c
FILTER LED Clock
COOL LED LEVEL 2&3
HEAT LED LEVEL 4

h. STEP 8: TIMING RESET TEST (WATCH DOG).

• The test purpose is to verify that the CPU rise time after power failure
is between 1 to 3 sec, test results are indicated on the LEDS : STAND­BY,OPER, TIMER and FILTER turning ON one by one.

• The results of the test are coded as follows:

Pass condition:

1 sec - STAND-BY and OPER are turned ON
2 sec - STAND-BY, OPER and TIMER are turned ON

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Fail condition:

0 sec - STAND-BY is turned ON
3 sec - STAND-BY, OPER, TIMER and FILTER are turned ON

• When the timing reset test is completed, the next test will start
automatically.

i. STEP 9: MEMORY TEST (EEPROM)

• The test purpose is to check if the memory is functioning correctly. The test
result is reported by using the STAND-BY and FILTER LEDS:

LED Indicator Condition for LED to be ON

STAND-BY LED Test passed
FILTER LED Test failed

AT THIS POINT THE SELF-TEST IS COMPLETED.

In order to terminate Self-Test mode the User can change the unit setting from COOL
Mode, LOW FAN to COOL Mode, MED FAN or to wait without using the remote control
for 60 sec.

Values of Sensors Temperature VS. Voltage (DC)

Temp. (*C) Voltage (V) Temp. (*C) Voltage (V) Temp. (*C) Voltage (V) Temp. (*C) Voltage (V)

-20 4.554 2 3.744 24 2.555 46 1.487

-19 4.529 3 3.695 25 2.5 47 1.447

-18 4.502 4 3.646 26 2.445 48 1.409

-17 4.475 5 3.595 27 2.391 49 1.371

-16 4.446 6 3.544 28 2.338 50 1.334

-15 4.417 7 3.492 29 2.284 51 1.298

-14 4.386 8 3.439 30 2.232 52 1.263

-13 4.354 9 3.386 31 2.18 53 1.228

-12 4.322 10 3.332 32 2.128 54 1.195

-11 4.287 11 3.278 33 2.077 55 1.162

-10 4.252 12 3.223 34 2.027 56 1.13
9 4.216 13 3.168 35 1.978 57 1.099

-8 4.178 14 3.113 36 1.929 58 1.069

-7 4.14 15 3.058 37 1.881 59 1.04

-6 4.1 16 3.002 38 1.834 60 1.011

-5 4.059 17 2.946 39 1.798 61 0.983

-4 4.017 18 2.89 40 1.742 62 0.956

-3 3.974 19 2.833 41 1.698 63 0.929

-2 3.93 20 2.777 42 1.654 64 0.904

-1 3.885 21 2.722 43 1.611 65 0.879
0 3.839 22 2.666 44 1.569 66 0.854
1 3.792 23 2.61 45 1.527 67 0.831

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12.15 On Unit Indicators and Controls

STAND BY

INDICATOR

Lights up when the Air Conditioner is connected to power and
ready to receive the R/C commands
Blinks continuously in case of any thermistor failure.

OPERATION

INDICATOR

Lights up during operation.
Blinks for 300 ms, to announce that a R/C infrared signal has
been received and stored.
Blinks continuously during

• OCT High Pressure Protection Mode

• ICT High Pressure Protection Mode

• Deicing in Heating Mode

• Water Over Flow in ECC Model

TIMER INDICATOR Lights up during Timer and Sleep operation.

FILTER INDICATOR

Lights up when Air Filter needs to be cleaned.
Blinks during Water Over Flow in MBX/P2000 models.

COOLING

INDICATOR

Lights up when system is switched to Cool Mode by using the
Mode Switch on the unit.
Show the thermistor status in Diagnostic Mode

HEATING

INDICATOR

Lights up when system is switched Heat Mode by using the
Mode Switch on the unit.
Show the thermistor status in Diagnostic Mode.

MODE BUTTON

(Cool, Heat, SB)

Use to cycle the operation mode of the A/C unit among COOL,
HEAT and SB modes, without using the R/C.
Every time this switch is pressed, the next operation mode is
selected, in this order :
SB  Cool Mode  Heat Mode  SB  ...
Press this button continuously for 5 sec or more to start the
Diagnostic Mode.

RESET / FILTER

BUTTON

When the Filter LED is ON, press to turn off the Filter LED
after a clean filter has been reinstalled.
When the Filter LED is OFF, use this button to enable/disable
the buzzer announcer.

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12.16 Clock Random Delay From 0 to 2.5 seconds

0 = Clock Switch Open
1 = Clock Switch close

The Clock is activate according to the following table:

A/C STATE

(before clock is changed)

CLOCK STATE

(before clock is changed)

CLOCK ACTION

(clock is changed)

A/C NEW STATE

(after clock is changed)

ON 1 0 OFF

OFF 0 1 ON

OFF by

interrupt

(1)

1 0 OFF

ON by

interrupt

(1)

01ON

Notes :

1. Clock can be interrupted by :

• R/C - POWER ON/OFF Push-button.

• R/C - TIMER.

• R/C - SLEEP.

• A/C - MODE SWITCH.

2. Any change in the CLOCK level during the first 6 sec after the system
Reset is ignored.

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12.17 System Diagnostics

Pressing Mode button for 5-10 seconds in SB or any other operation mode will
activate diagnostic mode by the acknowledgment of 3 short beeps and lighting of
COOL and HEAT LEDs.

In diagnostic mode, system problems will be indicated by blinking of Heat & Cool
LEDs.

The coding method will be as follow:
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 table:

No Problem

żżżżż

1 RT1 is disconnected żƔƔƔƔ
2 RT1 is shorted żƔƔƔż
3 (Reserved) żƔƔżƔ
4 RT2 is disconnected ƔżƔƔƔ
5 RT2 is shorted ƔżƔƔż
6 (Reserved) ƔżƔżƔ
7 RT2 temp reading doesn’t change ƔżƔżż
8 RT3 is disconnected ƔƔżƔƔ

9 RT3 is shorted ƔƔżƔż
10 (Reserved) ƔƔżżƔ
11 RT3 temp reading doesn’t change ƔƔżżż
12 RT2 & RT3 temp reading doesn’t change Ɣżżżż

ż - ON, Ɣ - OFF

Notes:

1. If faults occur in more than one thermistor (except case number 12 on the table
above), only one fault will be indicated according to the following order: RT3,
RT2, RT1.

2. A/C will jump out to normal mode if sending a command by the R/C in the
system diagnostics mode. If this command from the R/C contain a Group ID, this
ID will become the new Group ID of the ELCON unit.

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12B. CONTROL SYSTEM LEX 7-14 LED FULLY FEATURED

12B.1 General Functions

12B.1.1 Operation Modes

x Auto Mode
x Cooling Mode
x Drying Mode
x Fan Mode
x Heating Mode

12B.1.2 Functions

x I FEEL,
x Forced Mode,
x Protection - hot keep, Deicing, defrosting,
x Timer,
x Sleep,
x Fresh Air,
x Ionizer,
x E.S.F,

RCT: remote controller temperature
SPT: set point temperature

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12B.2 Operation Modes

12B.2.1 Auto Mode Operation

Heating / Fan Drying Cooling

22ºC 26ºC RT

x If RT >= 26ºC - A/C will go into Cooling Mode; Initial SPT is 25ºC.
x If 22ºC < RT < 26ºC- A/C go into Drying mode; Initial SPT is 24ºC.
x If RT <= 22ºC - A/C will go into Heating Mode; Initial SPT is 23ºC.
x For Cooling only, If RT <= 22ºC - A/C will go into Fan Mode; Initial SPT is

23ºC.

x IFAN speed range: Auto, Low, Mid and Hi. Initial speed: Auto.
x SPT can be set by R/C command (heating, cooling, dry or fan mode).
x The Mode can not be changed.
x If RT is invalid, it will go into Drying mode state (2).

12B.2.2 Cooling Mode

x SPT range: 16ºC-30ºC. Initial: 24ºC;
x IFAN speed range: Auto, Low, Mid and High. Initial speed: Hi;
x Auto Fan

IFAN H

M

L

SPT+1ºC SPT+2ºC SPT+3ºC SPT+4ºC RT

Note:

1. When fan speed changes from Low speed to High speed, there is 3 minutes
delay to avoid the fan speed changing frequently. But not vice versa.

2. If RT is invalid and the fan speed is set to Auto, IFAN will operate at medium
speed.

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12B.2.3 Comp’ Operation

COMP On

Off

SPT-1ºC SPT+1ºC RT

x If RT >= SPT+1ºC, COMP and OFAN is activated;
x If RT <= SPT-1ºC, COMP stop, OFAN will turn off after 5 seconds delay.

Note:

x COMP turns off have 3 min delay protection;
x COMP turn on have 5 min continues protection.
x OFAN will turn off 5 seconds after COMP stop, when turning the unit off or

changing to heat mode.

x RV & AHEAT closes.
x Louvers action rules see 3.7
x Sleep Function, see 3.1

12B.2.4 Defrosting

ICT (ºC)

+7

+1
0

-3
>= 5 min 1 min >= 5 min

COMP ON

OFF

OFAN ON

OFF

x IFAN always run at the set speed.
x After COMP is on for 5 minutes, if (ICT <= -3ºC) during 1 minute, COMP and

OFAN stop. If (ICT > 7ºC), COMP and OFAN will resume to the normal
operation.
Note: If ICT is invalid, defrosting protection cannot be activated

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12B.2.5 High Pressure Protection (Excluding cooling only unit type)

OCT (ºC)
66

61

55

52

>= 3 min
COMP Any
Off
OFAN follows COMP OFAN FORCED ON
OFAN Any
On
LOW LOW
IFAN Any
LOW

x If (OCT >= 61ºC), IFAN is forced to LOW. If (OCT <= 55ºC), IFAN restore to

normal.

x If (OCT >= 66ºC), COMP stop and OFAN is forced on. If (OCT <= 52ºC),

COMP and OFAN will restore to normal operation.

Note: If OCT is invalid, high pressure protection cannot be activated.

12B.2.6 Fan Mode

x S.P.T range: 16ºC~30ºC. Initial: 24ºC;
x IFAN speed range: Auto, Low, Mid and Hi. Initial speed: High;
x If IFAN is set to Auto Fan, the IFAN will run at Low speed;
x IFAN is always on, COMP, OFAN, AHEAT, RV are always off.

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12B.2.7 Drying Mode

x SPT range: 16ºC~30ºC. Initial: 24ºC;
x IFAN speed range: Auto, Low, Mid and Hi. Initial speed: Low;
x IFAN speed can be changed only in state (1);

State (1)

(2)

(3)

SPT-1ºC SPT SPT+2ºC SPT+3ºC

x If in state (1) - (SPT - 1ºC < RT <= SPT + 2ºC), unit will go into state (2)
x If in state (1) or state (2), - (RT <= SPT - 1ºC), unit will go into state (3)
x If in state (3), - (SPT <= RT < SPT + 3ºC), unit will go into state (2)
x If in state (2) or state (3), - (SPT + 3ºC <= RT), unit will go into state (1)

COMP on
Off
4 min - 10 min 10 min - 6 min -10 min
OFAN on
Off
Supper low Supper low set speed
IFAN on
Off
State3 State2 State1

x State (1), COMP & OFAN are on, IFAN runs at the setting fan speed;
x State (2), COMP & OFAN are on for 10 minutes and off for 6 minutes, IFAN

speed is always at Supper Low (Note: F/S type is Low);

x State (3), COMP & OFAN are on for 4 minutes and off for 10 minutes, IFAN

speed is always at Supper Low ( Note: F/S type is Low);

Note:

1. If RT <= 14ºC, Dry mode cannot be activated. COMP, OFAN, and IFAN are
stopped.

2. OFAN will turn off 5 seconds after COMP stop, when turning the unit off or
changing to heat mode.

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12B.2.8 Heating Mode

x SPT range: 16ºC~30ºC. Initial: 24ºC;
x In wall mounted units the indoor RT compensation temp’ value is - 3ºC -> RT,

(Excluding I FEEL Mode)

x IFAN speed range: Auto, Low, Mid and Hi. Initial speed: Low;
x Auto Fan

IFAN H

M

L

SPT-4ºC SPT-3ºC SPT-2ºC SPT-1ºC RT

Note:

1. When IFAN speed changes from low speed to high, there is 3 minutes delay to
avoid the fan speed changing frequently, But not vice versa.

2. If RT is invalid and the fan speed is set to Auto, IFAN will operate at the medium
speed

12B.2.9 Comp’ Operation

COMP On

Off

SPT-1ºC SPT SPT+1ºC RT

x If RT>=SPT+1ºC, COMP stop, OFAN will turn off after a delay of 30 seconds.
x If RT<=SPT-1ºC, COMP and OFAN will turn on,

Note:

1. COMP turns off have 3 min delay protection.

2. COMP turns on have 5 min protection.

3. OFAN will turn off 30 seconds after COMP stop, also when turning the unit off or
changing to cooling, Dry or Fan mode.

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12B.2.10 Hot keep function

COMP on,

IFAN set speed

Supper low

Off

21ºC 23ºC 32ºC 38ºC ICT

Note: If COMP is on for a period of 4 minutes or (ICT >= 38ºC), IFAN is in set speed;

COMP off,

IFAN set speed

Supper low

Off

21ºC 23ºC ICT

12B.2.11 For F/S

IFAN Set speed

L

Off

23ºC 28ºC 32ºC 38ºC ICT

x If COMP turn on and (ICT >= 28ºC), IFAN is Low;
x If COMP is on for a period of 4 minutes or (ICT >= 38ºC), IFAN is in set speed;
x If COMP off, IFAN keep operating at Low speed for additional 30 seconds and stop.

Note:
When ICT is invalid, IFAN stop till COMP is on for 40 seconds, and then will turn on at the
set speed. If COMP turns off, IFAN will be activated at super low speed for 30seconds
then stop. (For F/S is Low speed).

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12B.2.12 High Pressure Protection

ICT (ºC)
66

61

55

52
>= 10s >= 3 Min
COMP Any
Off

OFAN Any
Off

x If ICT >= 61ºC, OFAN turn off. If ICT <= 55ºC, OFAN turn on.
x If (ICT >= 66ºC) for duration of 10 seconds, COMP turn off. If ICT <= 52ºC,

COMP turn on.

Note:
If ICT is invalid, High Pressure protection cannot be activated.

12B.2.13 Auxiliary Electric Heating

AHEAT will turn on, if all the following conditions are met:

x COMP is on for 60 seconds;
x RT <= 20ºC;
x IFAN run at least at LOW speed;
x RT <= SPT – 2ºC;
x ICT <= 50ºC.

AHEAT will turn off, if one of the following conditions is filled:

x RT > 21ºC;
x COMP or IFAN stop;
x RT >= SPT - 1ºC;
x ICT >= 55ºC.

Note:

1. If ICT or RT is invalids, AHEAT will not be activated.

2. When the system turns off, if the AHEAT does not operate before, IFAN
operates according to the hot keep condition, otherwise, IFAN should turn off
after 30 seconds’ at supper low fan speed (Note: F/S type in low speed) to
blow off the remaining heat.

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12B.2.14 Deicing

Deicing starts, if OCT <= -6ºC and meets with one of the following conditions:

x ICT < 39ºC, and IFAN is on for 20 minutes, and COMP is on for 5

minutes, and that ICT decrease 1ºC per 6 minutes, occur 3 times;

x ICT < 39ºC, and (sum of COMP on >= 3 Hours), and COMP is on for 20

minutes;

x ICT – RT < 19ºC ( for F/S :ICT-RT<16ºC )keep for 5 minutes, and (sum

of COMP on) > 45 minutes ,And COMP is on for 20 minutes;

x (4) ICT =< 35 ºC, and IFAN is on for 20 minutes, COMP is on for

5minutes,and sum of COMP on > 45 minutes.
Note:
x If OCT is invalid, and (ICT < 39ºC), and COMP keeps on for 30

minutes, and ICT is decreasing 1ºC per 6 minutes occur 3 times;

x If OCT and ICT are invalid; and if (sum of COMP on) >= 3 Hours;
x If ICT is invalid, and (OCT <-6ºC) keeps for 4 min, (sum of COMP on) > 45min.

13b.2.14.1 Deicing process:
According to anti-cool wind

IFAN Any
Off
OFAN Any
Off
RV Any
Off
COMP Any
Off
AHEAT Any
Off
1min 55s 5s 9 min or OCT >= 12 ºC 55s 20s 5s

x At the beginning of Deicing, COMP, IFAN, OFAN stop, RV stops after 55

seconds, and then COMP will turn on after 5 seconds.

x Deicing ends if (OCT >= 12ºC) or Deicing time is more than 9 minutes.
x Once deicing ends, IFAN operates according to anti-cool fan mode;
x Once deicing ends, COMP stops for 20 seconds, OFAN will turn on.

After 35 seconds, RV will turn on, 5 seconds later COMP resumes its

operation;
x If AHEAT is operating when deicing conditions met, AHEAT will be

turned off, and o deicing starts 1 minute later.
x After Deicing ends, if the conditions of AHEAT opening are met, AHEAT will turn on.

Note:

1. Deicing can’t end at the first 60 seconds once it was activated.

2. If OCT is invalid, Deicing ends after 5 minutes.

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12B.3 Other Functions

12B.3.1 Sleep Function

RT Cooling or drying Mode
SPT + 2ºC
SPT + 1ºC
SPT
Standby
Heating Mode
SPT
SPT - 2ºC
SPT - 3ºC

1 hour 1 hour 6 hours T

x After 8 hours, it will go into Standby.

Note:
x During sleep mode, IFAN speed can be set by RC command.

12B.3.2

Timer Function

x Starts or stops the unit operation after preset time.
x After power failure, all preset timers are cleared, the system is forced to stand

by mode and the Timer LED indicator is blinked to indicate the situation. The
LED keeps blinking until the Timer setting can be reloaded form an R/C
message.

x When the A/C receives any valid message from the R/C, Its current ON/OFF

Timer settings will be replaced by the new timer setting in the R/C message.

Timer Unit ON Unit Off

Timer ON ON ON
Timer OFF OFF OFF
Timer ON before OFF No action -> OFF -> ON -> OFF
Timer OFF before ON -> OFF -> ON No action -> ON

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12B.3.3 I FEEL

x The switchover between RCT by the remote controller and RT detected by the

control board can be done by “I FEEL” function. After receiving the “I FEEL”
command from the remote controller, MCU decide the operation mode of the
air-conditioner by RCT detected by the remote controller.

x In I-Feel Mode, IF I-Feel data hasn’t been received from the R/C for more than

4 minutes, the I-Feel Mode would be suspended and the Room Temperature is
replaced by the RT from the local sensor. As soon as new I-FEEL data is
received from the R/C, the I-FEEL Mode will be resumed.

12B.3.4

E.S.F and Ionizer

x E.S.F and Ionizer will turn on when receiving a signal from the R/C. and IFAN

on.

12B.3.5 Fresh- Air Function

x Fresh-Air has two ways: continuous and Auto.
x If the Fresh-Air signal from R/C is continuous, Fresh-Air is on till the signal is

changed.

x If the Fresh-Air signal from R/C is Auto, Fresh Air will turn on for 20 minutes

and then stop for 20 minutes, it continues doing cycle by cycle till the signal is
changed.

12B.3.6 EEPROM

x The data stored in the EEPROM include:
x the setting parameters, such as: on/off status, temperature, fan speed, mode,

louvers auto or fix, E.S.F , Ionizer, Fresh air, Timer status, Filter hour

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12B.3.7 Louvers control

x Louvers is effective only if IFAN operates, but the remote controller can control

its “ON” and “OFF” at any time after start up. When the air-conditioner is
energized initially, the louvers is off, the following two modes can be controlled:
(1) swing continuously; (2) cease any position in the swing range.

For WNG, there are two step motors, the L/R louvers action rules are no
different.

Swing angle: (UP/DOWN)

A/C model Total angle Limit in User

(Max_Swg) Heat Mode Other Mode Position mode

WMN1 119 60--104 74--119 60--119
WMN2 135 60--115 80--135 60--135

WNG 110 60--110 33--90 33--110

Travel at Auto_Swing

Swing angle: (L/R) this function used for WNG only.
Swing angle:
Left side: 0 - 70º
Right side: 0 - 60º

12B.3.8 Forced Mode

x When the air-conditioner is in standby, press the “SLEEP” button for 3 seconds

till 5 beeps given by the buzzer, the forced cooling operation starts. COMP and
OFAN turns on, COMP is restricted by 3 minutes delay protection. RV does not
move, and IFAN run at high speed, and shut off automatically after 30 minutes
running, the air-conditioner is in the normal mode of standby. If there is any
control commands, the air-conditioner will operate according to the commands.

12B.3.9

Modes Switchover Instructions

x Switch-over between the modes must be under the condition of COMP 3

minutes protection and RV delay 2 minutes to shutdown after COMP off, when
exit the heating mode.

x Switchover between Cooling and Drying mode, if COMP meets the operation

conditions, COMP keeps running.

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12B.3.10

Sound Indication

x The buzzer will beep twice when starts and a long sound when stops, one

sound for receiving a command.

12B.3.11

Emergency Function

x The first press on the emergency key on the indoor control board, the unit

enters to cooling mode (SPT: 22ºC; fan speed: Hi; Louver: Auto); the second
time press on the emergency key, the unit enters to heating mode (SPT: 26ºC;
fan speed: MID; Louver: Auto; AHEAT can operation). Press on the emergency
key once again, the unit exits to STBY.

12B.3.12 Strong Function.

x Strong function will active once receiving a signal from R/C. IFAN run at supper

high speed for 15 minutes, then restore to the set fan speed. When Strong
signal from R/C is off, Strong function is canceled, IFAN operate at set speed.

Note: If COMP stops, strong function is canceled; IFAN will operate at set speed.

12B.3.13

On unit indicators and controls

x For WMN Standby led indicate Error message

Error indication Standby led Blinks at 1Hz ( on  off)

RT 1 
ICT 2 
OCT 3 
IFAN feedback 4 

x During protection and Deicing operation LED blinks up.
x For WNG and F/S (use two-color LED)
x If unit is on, Operation LED light up, Standby LED turn off, During protection

and Deicing operation LED blinks up, not to indicate an Error message.

x If unit is off, Standby LED light up, Operation LED turn off, indicate error

message blinks up (see 3.13.1.1)

12B.3.14 Clogged air filter

x Filter LED will turn on after 512 operating h/r.

x Standby led indicate Error message Filter LED will turn OFF after Timer is

restarted by pressing the RESET button.

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12B.3.15 Protection

x When all relays meet their function requirements at the same time, there

should be an interval of 0.5 second between every two relays. The action
procedures are as follows:

ON state:

AHEAT

Æ RV Æ OFAN —> COMP

OFF state:
AHEAT

Å RV Å OFAN Å COMP

12B.3.16

Compressor delay protection

x At startup if the operation mode is not change, compressor will keep on

running during the first 5 minutes, and it will delay for 3 minutes for a re-start
once it was turned off.

x Compressor starts at 3 minutes delay unless:
x Power is on for the first time or power off lasts for 3 minutes, COMP has no 3

minutes delay protection;

12B.3.17 RV control

x In cooling or drying mode or fan mode, RV is off.
x In heating mode, RV will turns on.
x Switching between heating mode to other modes, or shutting off in heating

mode, RV delays 2 minutes before turning off.

12B.3.18 5 Diagnostic

x If MCU detect that one of the sensors RT, ICT or, OCT is blow -40ºC or over

85ºC, the sensor is invalid and will be indicated (see 3.13).But the air­conditioner operates continuously.

x In Cooling or Heating mode, COMP turns on for 20 minutes and turns off for 5

minutes, it is continuously cycle by cycle. In Dry mode, COMP turns on for 10
minutes and turns off for 6 minutes.

x If RT is invalid, system runs at cycle by cycle mode.
x If OCT and ICT are invalid, system runs at cycle by cycle mode too.
x For cooling only unit’s type, if ICT is wrong, system runs at cycle by cycle

mode.

12-48

CONTROL SYSTEM

Revision Y06-01 Service Manual - LEX

12B.3.19 Self-test

x When shorting the TEST jumper, the action will be per 1 second according to

following:

x beep one -> Cool led on-> Cool led off, Heat led on-> Heat led off, power led

on-> power led off ,running led on-> running led off, timer led on-> timer led off
,filter led on-> filter led off -> step motor ( A and B) run to MAX angle -> IFAN in
Mid speed-> COMP on -> Comp off ,OFAN on -> OFAN off , RV on -> Valve off
,E.S.F on -> E.S.F off, Fresh Air on -> Fresh Air off ,Ionizer on -> Ionizer off ->
sensor test(see note1) -> step motor ( A and B) run to MIN angle -> beep two
then exit

Note:

If OCT is not 25 ± 2ºC, the power and operating led will turn on;
If RT is not 25 ±2ºC, operate led and timer led on; If ICT is not 25±2ºC, timer
and filter led will turn on.

12B.3.20

Jumper Settings

x Self test (1)
x Model (4)
x IFAN speeds (PG MOTOR) (3)
x RC or ST (1)

Note:

0 = Open Jumper (disconnect jumper)

1= close Jumper (Jumper is connected)

13-1

TROUBLESHOOTING

Revision Y06-01Service Manual - LEX

13. TROUBLESHOOTING

NO SYMPTON PROBABLE CAUSE CORRECTIVE ACTION

1. The stand-by
indicator (red led)
on the central
control display
panel doesn’t light
up.

There is no correct voltage
between the line and neutral
terminals on main P.C.B

-If the voltage is low repair power
supply.

-If there is no voltage repair
general wiring.

-If there is correct voltage replace
main or display P.C.B’S

2. The operation
indicator (green
led) on the central
control display
panel does not
light up.

The remote control batteries
are discharged

-Replace batteries of the remote
control.

3. The operation
indicator (green
led) does not light
up when starting
from unit.

Check main P.C.B and display
P.C.B

-Replace P.C.B if necessary.

4. The indoor fan
does not function
correctly.

Check the voltage between
indoor fan terminals on the
main P.C.B

-If there is voltage replace
capacitor or motor.

5. The outdoor fan
does not function
correctly.

Check the voltage between out
door fan terminals on the main
P.C.B

There is voltage between
outdoor fan terminals on the
outdoor unit.

There is no voltage between
outdoor fan terminals on the
outdoor unit.

-If there is no voltage replace main
P.C.B

-Replace capacitor or motor.

-Check and repair electrical wiring
between indoor and outdoor units.

6. The compressor
does not start up.

Check voltage on compressor
terminals on the outdoor unit.
(with ammeter)

Check if there is correct voltage
between compressor terminals
on the outdoor unit.

-If no voltage replace main P.C.B

-If low voltage repair power supply.

-If the voltage correct replace
capacitor or compressor.

-If there is no voltage repair
electrical wiring between indoor
and outdoor units.

7. The refrigeration
system does not
function correctly.

Check for leaks or restrictions.
With ammeter. Pressure gauge
or surface thermometer.

-Repair refrigeration system and
charge refrigerant if necessary.

13-2

TROUBLESHOOTING

Revision Y06-01 Service Manual - LEX

NO SYMPTON PROBABLE CAUSE CORRECTIVE ACTION

8 No cooling or

heating only
indoor fan works.

Outdoor fan motor faulty or
other fault caused, compressor
overload protection cut out.

-Replace P.C.B.

-Outdoor fan blocked remove
obstructions.

9. Only indoor fan
and compressor
working.

Outdoor fan blocked. -Remove obstructions.

10. Only indoor fan
working.

-Run capacitor of outdoor fan
motor faulty.

-Windings of outdoor fan are
shorted.

-Replace capacitor.

-Replace motor.

11. No cooling or
heating takes
place, indoor fans
working.

-Overload safety device on
compressor is cut out (low
voltage or high temperature).

-Compressor runs capacitor
faulty.

-Compressor windings are
shorted.

-Check for proper voltage, switch
off power and try again after one
hour.

-Replace compressor capacitor.

-Replace compressor.

12. No air supply
at indoor unit,
compressor
operates.

-Indoor fan motor is blocked or
turns slowly.

-Indoor fan run capacitor faulty.

-Motor windings are shorted.

-Check voltage, repair wiring if
necessary.

-Check fan wheel if it is tight
enough on motor shaft, tighten if
necessary.

13. Partial, limited air
supply at indoor
unit.

Lack of refrigerant (will
accompanied by whistling
noise) cause ice formation on
indoor unit coil in cooling mode.

-charge the unit after localizing
leak.

14. Water
accumulates
and over flow
from indoor unit
section.

Drain tube or spout of drain pan
clogged.

-Disassemble plastic drain tube
from spout of indoor unit drain pan.

15. Water dripping
from outdoor unit
base, (in heating
mode).

Water drain outlet is clogged. -Open outdoor unit cover clean out

water outlet clean the base inside
thoroughly.

16. Freeze-up of
outdoor coil in
heating mode,
poor heating effect
in room, indoor fan
operates.

-Faulty outdoor thermistor.

-Faulty control cable.

-Outdoor temperature is below
design conditions.

-Outdoor unit air outlet is
blocked.

-Replace thermistor.

-Repair control cable.

-Shut unit off, it cannot work
properly.

-Remove obstructions.

17. Unit is in heat
mode but
operating in
cooling.

-Faulty RV coil.

-RV coil is ok valve is stuck
position.

-Replace RV coil.

-Replace the reversing valve.

14-2

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01 Service Manual - LEX

14.1.2 Indoor Unit LEX 7, 9, 12, 14 LED

No. PN Description

Qty.

1 465800009

Grill A Assy./LEX7/9/12/14 AIRWELL .

1

465800016

Grill A Assy./ Electra LEX 7/9/12/14

1

465800020

Grill A Assy./ LEX7/9/12/14 Bosch

1

465800021

Grill A Assy./ LEX7/9/12/14 Siemens

1

2 4518655

Air Filter

2

3 4519132

Active Carbon Static Fiber filter

1

4519744

Low Temperature Catalyst Fiber Filter

1

4 465720059

Front Frame Assy./ LEX7/9/12/14

1

5 4526952

Screw Cover

2

6 4527173

EVAPORATOR ASSY WNG7/9 R410A

1

4527336

Evaporator Assy WNG12 R410A

1

453117000

Evaporator Assy./WNG14 R410A

1

4518683

EVAPORATOR ASSY WNG7/9

1

4519423

EVAPORATOR ASSY WNG12/14

1

7 4518664

Draining Hose(ordinary)

1

8 4527434

Air Outlet Assy

1

9 4518638

Upper Louver

1

9 4526953

Lower Louver

1

10 4518640

Vert. Louver A

2

4518641

Vert. Louver B

10

11 4518662

Bearing assy fan

1

12 4518661

Fan assy plastic D91

1

13 465700000

Unit Housing Assy./LEX

1

14 4518670

WNG INSTALLATION PLATE

1

15 4518654

Tube Bracket

1

16 4519864R

Motor ( LEX7/9/12/14 with new function)

1

4519425R

Motor (LEX7 without new function)

1

4518677

Motor (LEX9 without new function)

1

4519427R

Motor (LEX12 without new function)

1

4523706R

Motor (LEX14 without new function)

1

17 4518650

Motor Cover

1

18 452969400

Step Motor A

1

452969500

Step Motor B

1

19 4521158R

Power cord cable (Euro.)

1

4520278R

Power cord cable(Without plug)

1

20 4519147

Power Cord Clip

1

465320006

Wire Fixing Block

1

21 467300080R

Display Board Assy./ LEX7/9/12/14(with new function)

1

22 4518666

Sensor Braket

1

23 467300063R

Controller/WNG Flat (LEX-7) HuaLian MCU With New Function

1

467300064R

Controller/WNG Flat (LEX-9) HuaLian MCU With New Function

1

467300065R

Controller/WNG Flat (LEX-12) HuaLian MCU With New Function

1

467300066R

Controller/WNG Flat (LEX-14) HuaLian MCU With New Function

1

467300086R

Controller/WNG Flat (LEX-12) HuaLian MCU With New Function R22

1

467300087R

Controller/WNG Flat (LEX-14) HuaLian MCU With New Function R22

1

467300053R

Controller/WNG Flat (LEX7/9/12/14) HuaLian MCU Without New Function

1

24 438082

Thermistor Indoor coil BLACK

1

25 4519813

Thermistor room

1

26 465340012

Terminal Cover

1

27 4518663

ELECTROSTATIC FLITER WNG-1

1

4519338

FILTER FRAME(Optional)

1

28 4520416

Defrost cable EXPORT UNITS (For LEX7/9/12/14)

1

29 452760600R

RC-4 Remote controller(HL)

1

4521197

remote controller RC3 (silver)

1

30 4518651

Cover Side Motor

1

31 none

none

32 4518682

Gear BOX ASSY

1

33 4518646

Louver Support

2

34 4518868

Transformer For LEX7/9/12/14 (Optional)

1

35 4518657

Tube Lock

1

36

4518656 Mounting Hook

1

37 4519900

IONIZER CABLE A (Optional)

1

38 467430000

Power Supply Unit /Ionizer(Optional)

1

39 467480001

Ionizer/WNG NWNG SERIES(Optional)

1

4526951 Ionizer Cover (Optional)

1

40

465800018 Air Inlet Frame A Assy.

1

14-3

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01Service Manual - LEX

14.1.3 Outdoor Unit ONG 7, 9, 12 ST

14-4

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01 Service Manual - LEX

14.1.4 Outdoor Unit ONG 7 ST

Code Item Desc Quantity

Drawing

Number Effective From Effective To

433218 Front Panel A 1 1 05-Mar-04 Active
433221 Air Inlet Ring-420 1 2 05-Mar-04 Active
433223 Painting Insulation Plate 1 3 05-Mar-04 Active
4519251 Axial Fan OD=400 1 4 05-Mar-04 Active
4526591 Motor YYK30Z-6 1 5 05-Mar-04 Active
433215 Motor Support 1 6 05-Mar-04 12-Mar-04
4527203 Motor Support 1 6 12-Mar-04 Active
4519601 Base Painting Assy. 1 7 05-Mar-04 12-Mar-04
4526747 Base Painting Assy. 1 7 12-Mar-04 Active
433217 Partition Plate 1 8 05-Mar-04 Active
455000502 Compressor Capacitor 35uF With Screw 1 9 05-Mar-04 Active
4519611 Electric Panel Painting Plate 1 10 05-Mar-04 Active
4524176 1/4 Liqiud Valve(R410A) 1 11 05-Mar-04 Active
4524177 3/8 Gas Valve(R410A) 1 12 05-Mar-04 Active
455000000 single patch Capacitor for fan 1 13 05-Mar-04 Active
4514588 5 Poles terminal block 1 14 05-Mar-04 Active
204107 Cable clip Nylon 1 15 05-Mar-04 Active
236179 2 Poles terminal block 1 16 05-Mar-04 11-Mar-04
4516637 Out sensor Black 1 17 05-Mar-04 11-Mar-04
4526614 Capillary 1 19 05-Mar-04 02-Sep-04
4526606 Capillary Assy.(ST) 1 19 02-Sep-04 Active
4525650 Charge tube 1 20 05-Mar-04 Active
4526608 Compressor Jacket 1 21 05-Mar-04 12-Mar-04
452799600 Compressor Jacket ONG3-7 1 21 12-Mar-04 Active
4519610 Compressor Isolation. Top Cover 1 22 05-Mar-04 11-Mar-04
4514091 Grommet 3 23 05-Mar-04 Active
4510677 Nut With Flange M8 -D=24 3 24 05-Mar-04 Active
4519987 Wire assy 1 25 05-Mar-04 12-Mar-04
4527008 Wire assy 1 25 12-Mar-04 Active
4526578 Compressor Assy. LG GK086P 1 26 05-Mar-04 Active
4514088 Gasket 1 27 05-Mar-04 Active
4516824 Cover Terminal 1 28 05-Mar-04 Active
4514089 Nut hex 1 29 05-Mar-04 Active
433229 cover valve 1 30 05-Mar-04 Active
433234 Clamp 1 31 05-Mar-04 Active
4518950 Filter Drier BFK-053S 1 31 05-Mar-04 11-Mar-04
4519606 Right side panel (painting plate) 1 32 05-Mar-04 Active
4527323 2 Discharge Pipe Assy. 2 (7ST) 1 33 11-Mar-04 Active
4526574 Suction Tubing 1 (7ST) 1 34 05-Mar-04 Active
433228 Back Side Net 1 35 05-Mar-04 Active
433216 Bridge 1 36 05-Mar-04 Active
433235 SPACER A 22*1 1 37 05-Mar-04 11-Mar-04
4526615 Condensor Soldering Assy 1 38 05-Mar-04 Active
4519614 Painting Top Cover 1 39 05-Mar-04 Active
4519300 Nut M5 L 1 40 05-Mar-04 Active
433225 Handle 1 41 05-Mar-04 Active
4519607 Left Side Panel Painting Plate 1 42 05-Mar-04 Active
4526573 Discharge Tubing 1 43 05-Mar-04 11-Mar-04

14-5

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01Service Manual - LEX

14.1.5 Outdoor Unit ONG 9 ST

Item Code Item Desc Quantity

Drawing

Number Effective From Effective To

433218 Front Panel A 1 1 05-Mar-04 Active
433219 Front Panel A1 1 1 05-Mar-04 05-Mar-04
433221 Air Inlet Ring-420 1 2 05-Mar-04 Active
433223 Painting Insulation Plate 1 3 05-Mar-04 Active
4519251 Axial Fan OD=400 1 4 05-Mar-04 Active
4519250 Fan Motor YDK30-6V 1 5 05-Mar-04 Active
433215 Motor Support 1 6 05-Mar-04 05-Mar-04
4527203 Motor Support 1 6 05-Mar-04 Active
4526747 Base Painting Assy. 1 7 05-Mar-04 Active
433217 Partition Plate 1 8 05-Mar-04 Active
455000503 Compressor Capacitor With Screw 1 9 05-Mar-04 Active
4519611 Electric Panel Painting Plate 1 10 05-Mar-04 Active
4524176 1/4 Liqiud Valve(R410A) 1 11 05-Mar-04 Active
4524177 3/8 Gas Valve(R410A) 1 12 05-Mar-04 Active
455000001 single patch Capacitor for fan 1 13 05-Mar-04 Active
4514588 5 Poles terminal block 1 14 05-Mar-04 Active
204107 Cable clip Nylon 1 15 05-Mar-04 Active
4527281 Capillary Assy 1 19 05-Mar-04 Active
4527362 Charge tube TP2 6.35x0.8 1 20 05-Mar-04 Active
452799601 Compressor Jacket ONG3-9 1 21 05-Mar-04 Active
4510677 Nut With Flange M8 -D=24 1 24 05-Mar-04 Active
4527008 Wire assy 1 25 05-Mar-04 Active
4524230 Compressor assy. GK113PAG 1 26 05-Mar-04 Active
4516826 Rubber washer 1 27 05-Mar-04 Active
4516825 Cover Terminal 1 28 05-Mar-04 Active
4514089 Nut hex 1 29 05-Mar-04 Active
433229 cover valve 1 30 05-Mar-04 Active
433234 Clamp 1 31 05-Mar-04 Active
4519606 Right side panel (painting plate) 1 32 05-Mar-04 Active
4527279 Discharge Tube Assy 2 £¨9ST) 1 33 05-Mar-04 Active
4527280 Suction Tube 1 1 34 05-Mar-04 Active
433228 Back Side Net 1 35 05-Mar-04 Active
433216 Bridge 1 36 05-Mar-04 Active
4527155 condensor Soldering assy 1 38 05-Mar-04 Active
4519614 Painting Top Cover 1 39 05-Mar-04 Active
4519300 Nut M5 L 1 40 05-Mar-04 Active
433225 Handle 1 41 05-Mar-04 Active
4519607 Left Side Panel Painting Plate 1 42 05-Mar-04 Active
4514091 Grommet 1 230 05-Mar-04 Active

14-6

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01 Service Manual - LEX

14.1.6 Outdoor Unit ONG 12 ST

Item Code Item Desc Quantity

Drawing
Number Effective From Effective To

433218 Front Panel A 1 1 15-Nov-03 13-Jan-04
433219 Front Panel A1 1 1 13-Jan-04 Active
433221 Air Inlet Ring-420 1 2 15-Nov-03 Active
433223 Painting Insulation Plate 1 3 15-Nov-03 Active
4519251 Axial Fan OD=400 1 4 15-Nov-03 Active
4519692 Fan Motor (810rpm) 1 5 15-Nov-03 Active
433215 Motor Support 1 6 15-Nov-03 16-Feb-04
4527203 Motor Support 1 6 16-Feb-04 Active
4519601 Base Painting Assy. 1 7 15-Nov-03 15-Nov-03
4526747 Base Painting Assy. 1 7 15-Nov-03 16-Feb-04
452772500 Base Plate Painting Assy. 1 7 16-Feb-04 Active
433217 Partition Plate 1 8 15-Nov-03 Active
4517993 Cap. 35uF/450V 1 9 15-Nov-03 29-Dec-03
455000504 Compressor Capacitor With Screw 1 9 29-Dec-03 Active
4519611 Electric Panel Painting Plate 1 10 15-Nov-03 Active
4524176 1/4 Liqiud Valve(R410A) 1 11 15-Nov-03 Active
4524595 1/2 Gas Valve for ONG R410A 1 12 15-Nov-03 13-Jan-04
4524177 3/8 Gas Valve(R410A) 1 12 13-Jan-04 Active
4517990 Cap. 2uF/450V 1 13 15-Nov-03 08-Jan-04
455000001 single patch Capacitor for fan 1 130 08-Jan-04 09-Feb-04
455000108 Double patch Capacitor for fan 1 13 09-Feb-04 Active
4514588 5 Poles terminal block 1 14 15-Nov-03 Active
204107 Cable clip Nylon 1 15 15-Nov-03 Active
236179 2 Poles terminal block 1 16 15-Nov-03 16-Feb-04
4516637 Out sensor Black 1 17 15-Nov-03 16-Feb-04
4525210 Restrictor (031) 1 18 15-Nov-03 13-Jan-04
4524923 Capillary 2.6*1.6*800 1 19 15-Nov-03 13-Jan-04
4526848 Capillary Assy. (OD2.6xID1.6x1000) 1 19 13-Jan-04 Active
4525650 Charge tube 1 20 15-Nov-03 13-Jan-04
4527362 Charge tube TP2 ¦?6.35x0.8 1 20 13-Jan-04 Active
4519600 Compresssor Jacket 1 21 15-Nov-03 13-Jan-04
4527007 Comp. Jacket 1 21 13-Jan-04 16-Feb-04
4527058 Comp. Jacket 1 21 16-Feb-04 Active
4519610 Compressor Isolation. Top Cover 1 22 15-Nov-03 13-Jan-04
4514091 Grommet 3 23 15-Nov-03 15-Nov-03
4516357 Rubber Cushion 1K15910311 3 23 15-Nov-03 Active
4510677 Nut With Flange M8 -D=24 3 24 15-Nov-03 Active
4519987 Wire assy 1 25 15-Nov-03 13-Jan-04
4527008 Wire assy 1 25 13-Jan-04 16-Feb-04
4519987 Wire assy 1 25 16-Feb-04 Active
4524232 Compressor assy. GK151PAD 1 26 15-Nov-03 15-Nov-03
4526452 Comp. Assy GMCC PA145X2C-4FT 1 26 15-Nov-03 Active
4516359 Terminal Packing 1K14720130 1 27 15-Nov-03 Active
4516826 Rubber washer 1 27 15-Nov-03 15-Nov-03
4516358 Terminal Cover 1K14720012 1 28 15-Nov-03 Active
4516825 Cover Terminal 1 28 15-Nov-03 15-Nov-03
4514089 Nut hex 1 29 15-Nov-03 15-Nov-03
4516360 Terminal Nut 1K14300710 1 29 15-Nov-03 Active
433229 Valve Cover 1 30 15-Nov-03 Active
433234 Clamp 1 31 15-Nov-03 Active
4518950 Filter Drier BFK-053S 1 31 15-Nov-03 13-Jan-04
4519606 Right side panel (painting plate) 1 32 15-Nov-03 Active
4526790 Discharge Tube Assy. 1 33 15-Nov-03 Active
4525081 Suction Tube 12.7*0.8*1090 1 42 15-Nov-03 15-Nov-03
4526791 Suction Tube Assy 1 34 15-Nov-03 Active
433228 Back Side Net 1 35 15-Nov-03 Active
433216 Bridge 1 36 15-Nov-03 Active
433235 SPACER A 22*1 1 37 15-Nov-03 16-Feb-04
4525529 condensor Soldering assy 1 47 15-Nov-03 13-Jan-04
4526806 condensor Soldering assy 1 38 13-Jan-04 16-Feb-04
4526804 condensor Soldering assy 1 38 16-Feb-04 Active
4519614 Painting Top Cover 1 39 15-Nov-03 Active
4519300 Nut M5 L 1 40 15-Nov-03 Active
433225 Handle 1 41 15-Nov-03 Active
4519607 Left Side Panel Painting Plate 1 42 15-Nov-03 Active
4525080 Discharge Tube 9.53*0.8*470 1 43 15-Nov-03 15-Nov-03

14-7

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01Service Manual - LEX

14.1.7 Outdoor Unit ONG 14 ST

14-8

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01 Service Manual - LEX

14.1.8 Outdoor Unit ONG 14 ST

Item Code Item Desc Quantity

Drawing

Number Effective From

Effective

To

433219 Front Panel A1 1 1 01-Mar-04 15-Mar-04
433218 Front Panel A 1 1 15-Mar-04 Active
433221 Air Inlet Ring-420 1 2 01-Mar-04 Active
433223 Painting Insulation Plate 1 3 01-Mar-04 Active
4519251 Axial Fan OD=400 1 4 01-Mar-04 Active
4520171 Fan Motor (910rpm) 1 5 01-Mar-04 Active
4527203 Motor Support 1 6 01-Mar-04 Active
4527255 Base Painting Assy. 1 7 01-Mar-04 Active
4527202 Partition Plate 1 8 01-Mar-04 Active
455000503 Compressor Capacitor With Screw 1 9 01-Mar-04 Active
4519611 Electric Panel Painting Plate 1 10 01-Mar-04 Active
4524176 1/4 Liqiud Valve(R410A) 1 11 01-Mar-04 Active
4524595 1/2 Gas Valve for ONG R410A 1 12 01-Mar-04 Active
455000108 Double patch Capacitor for fan 1 13 01-Mar-04 Active
4514588 5 Poles terminal block 1 14 01-Mar-04 Active
204107 Cable clip Nylon 1 15 01-Mar-04 Active
236179 2 Poles terminal block 1 16 01-Mar-04 Active
4516637 Out sensor Black 1 17 01-Mar-04 Active
4526918 Valve & Capillary Assy 1 19 01-Mar-04 01-Mar-04
4526919 Capillary Assy ID1.6x600 1 19 01-Mar-04 Active
4527362 Charge tube TP2 ¦?6.35x0.8 1 20 01-Mar-04 Active
4527058 Comp. Jacket 1 21 01-Mar-04 Active
4527287 Grommet 3 23 01-Mar-04 Active
4510677 Nut With Flange M8 -D=24 3 24 01-Mar-04 Active
4519987 Wire assy 1 25 01-Mar-04 Active
4526453 Compressor Assy. RN165VHSMT 1 26 01-Mar-04 Active
4527289 Terminal Packing 1 27 01-Mar-04 Active
4527285 Terminal Cover SC01D024 1 28 01-Mar-04 Active
4527286 Terminal Nut 1 29 01-Mar-04 Active
433229 valve cover 1 30 01-Mar-04 Active
433234 Clamp 1 31 01-Mar-04 Active
4519606 Right side panel (painting plate) 1 32 01-Mar-04 Active
4526794 4-way Valve Welding Assy. 1 33 01-Mar-04 01-Mar-04
4526797 Discharge Tube Assy. 1 33 01-Mar-04 Active
4526798 ASuction Tube A 1 34 01-Mar-04 Active
4526911 Distribution Capillary Assy 1 35 01-Mar-04 Active
4526903 Collection tube Assy 1 36 01-Mar-04 Active
433228 Back Side Net 1 37 01-Mar-04 Active
433216 Bridge 1 38 01-Mar-04 Active
4526808 condensor assy 1 39 01-Mar-04 01-Mar-04
4526809 condensor assy 1 39 01-Mar-04 25-Aug-04
4526796 condensor Soldering assy 1 39 25-Aug-04 Active
4519614 Painting Top Cover 1 40 01-Mar-04 Active
4519300 Nut M5 L 1 41 01-Mar-04 Active
433225 Handle 1 42 01-Mar-04 Active
4519607 Left Side Panel Painting Plate 1 43 01-Mar-04 Active

14-9

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01Service Manual - LEX

14.1.9 Outdoor Unit ONG 7 RC

14-10

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01 Service Manual - LEX

14.1.10 Outdoor Unit ONG 7 RC

Item Code Item Desc Quantity

Drawing

Number Effective From Effective To

433218 Front Panel

A

1105-Ma

r

-04

A

ctive

433219 Front Panel

A

11105-Ma

r

-04 05-Mar-04

433221

A

ir Inlet Ring-420 1 2 05-Mar-04

A

ctive

433223 Painting Insulation Plat

e

1305-Ma

r

-04

A

ctive

4519251 Axial Fan OD=400 1 4 05-Ma

r

-04

A

ctive

4519692 Fan Motor (810rpm) 1 5 05-Ma

r

-04 12-Mar-04

4526591 Motor YY

K

30Z-6 1 5 12-Mar-04

A

ctive

4527203 Motor Suppor

t

1605-Ma

r

-04

A

ctive

452772500 Base Plate Painting Assy. 1 7 05-Ma

r

-04 12-Mar-04

4526747 Base Painting Assy. 1 7 12-Ma

r

-04

A

ctive

433217 Partition Plate 1 8 05-Ma

r

-04

A

ctive

455000504 Compressor Capacitor With Screw 1 9 05-Ma

r

-04 12-Mar-04

455000502 Compressor Capacitor 35uF With Screw 1 9 12-Ma

r

-04

A

ctive

4519611 Electric Panel Painting Plat

e

11005-Ma

r

-04

A

ctive

4524176 ??·§1/4 Liqiud Valve(R410

A

) 1 11 05-Mar-04

A

ctive

4524177 3/8 Gas Valve(R410

A

) 1 12 05-Mar-04

A

ctive

455000108 Double patch Capacitor for fan 1 13 05-Ma

r

-04 12-Mar-04

455000000 single patch Capacitor for fan 1 13 12-Ma

r

-04

A

ctive

4514588 5 Poles terminal bloc

k

11405-Ma

r

-04

A

ctive

204107 Cable clip Nylo

n

11505-Ma

r

-04

A

ctive

236179 2 Poles terminal bloc

k

11605-Ma

r

-04

A

ctive

4516637 Out sensor Black 1 17 05-Ma

r

-04

A

ctive

4526847 Valve-Capillary Ass

y

11905-Ma

r

-04 12-Mar-04

4526617 one way valve solderin

g

11912-Ma

r

-04

A

ctive

4527362 Charge tube TP2 6.35x0.8 1 20 05-Ma

r

-04

A

ctive

4527058 Comp. Jacket 1 21 05-Ma

r

-04 12-Mar-04

452799600 Compressor Jacket ONG3-7 1 21 12-Ma

r

-04

A

ctive

4516357 Rubber Cushion 1K15910311 3 23 05-Ma

r

-04 12-Mar-04

4514091 Grommet 3 23 12-Ma

r

-04

A

ctive

4510677 Nut With Flange M8 -D=24 3 24 05-Ma

r

-04

A

ctive

4519987 Wire assy 1 25 05-Ma

r

-04 12-Mar-04

4527375 Compressor Wire 1 25 12-Ma

r

-04

A

ctive

4526452 Comp.

A

ssy GMCC PA145X2C-4FT 1 26 05-Mar-04 12-Mar-04

4526578 Compressor Ass

y

. LG GK086P 1 26 12-Mar-04

A

ctive

4526601 Compressor LG G

K

086P 1 26 12-Mar-04 12-Mar-04

4516359 Terminal Packing 1K14720130 1 27 05-Ma

r

-04 12-Mar-04

4514088 Gasket 1 27 12-Ma

r

-04

A

ctive

4516358 Terminal Cover 1K14720012 1 28 05-Ma

r

-04 12-Mar-04

4516824 Cover Terminal 1 28 12-Ma

r

-04

A

ctive

4516360 Terminal Nut 1K14300710 1 29 05-Ma

r

-04 12-Mar-04

4514089 Nut hex 1 29 12-Ma

r

-04

A

ctive

433229 ???? 1 30 05-Ma

r

-04

A

ctive

433234 Clamp 1 31 05-Ma

r

-04

A

ctive

4519606 Right side panel (painting plate

)

13205-Ma

r

-04

A

ctive

4526745 4-way Valve Welding Ass

y

. 1 33 05-Mar-04 12-Mar-04

4526604 4-way Valve Welding Ass

y

. 1 33 12-Mar-04

A

ctive

4527308 PCB Suppor

t

13411-Ma

r

-04

A

ctive

4526748 Low-Temp. Controlle

r

13511-Ma

r

-04

A

ctive

433228 Back Side Net 1 36 05-Ma

r

-04

A

ctive

433216 Bridge 1 37 05-Ma

r

-04

A

ctive

4526804 condensor Soldering ass

y

13805-Ma

r

-04 12-Mar-04

4526605 condensor Soldering ass

y

13812-Ma

r

-04

A

ctive

4519614 Painting Top Cove

r

13905-Ma

r

-04

A

ctive

4519300 Nut M5 L 1 40 05-Ma

r

-04

A

ctive

433225 Handle 1 41 05-Ma

r

-04

A

ctive

4519607 Left Side Panel Painting Plat

e

14205-Ma

r

-04

A

ctive

4516114 2-W Valve coil 1 43 11-Ma

r

-04

A

ctive

14-11

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01Service Manual - LEX

14.1.11 Outdoor Unit ONG 9,12 RC

14-12

EXPLODED VIEWS AND SPARE PARTS LISTS

Revision Y06-01 Service Manual - LEX

14.1.12 Outdoor Unit ONG 9 RC

Item Code Item Desc Quantity

Drawing

Number Effective From Effective To

433218 Front Panel A 1 1 05-Mar-04 Active
433219 Front Panel A1 1 1 05-Mar-04 05-Mar-04
433221 Air Inlet Ring-420 1 2 05-Mar-04 Active
433223 Painting Insulation Plate 1 3 05-Mar-04 Active
4519251 Axial Fan OD=400 1 4 05-Mar-04 Active
4519250 Fan Motor YDK30-6V 1 5 05-Mar-04 Active
4527203 Motor Support 1 6 05-Mar-04 Active
4526747 Base Painting Assy. 1 7 05-Mar-04 Active
433217 Partition Plate 1 8 05-Mar-04 Active
455000503 Compressor Capacitor With Screw 1 9 05-Mar-04 Active
4519611 Electric Panel Painting Plate 1 10 05-Mar-04 Active
4524176 1/4 Liqiud Valve(R410A) 1 11 05-Mar-04 Active
4524177 3/8 Gas Valve(R410A) 1 12 05-Mar-04 Active
455000108 Double patch Capacitor for fan 1 13 05-Mar-04 Active
4514588 5 Poles terminal block 1 14 05-Mar-04 Active
204107 Cable clip Nylon 1 15 05-Mar-04 Active
236179 2 Poles terminal block 1 16 05-Mar-04 Active
4516637 Out sensor Black 1 17 05-Mar-04 Active
4527444 Restrictor (029) 1 18 05-Mar-04 11-Mar-04
4527127 Capillary Assy 1 19 05-Mar-04 Active
4527362 Charge tube TP2 6.35x0.8 1 20 05-Mar-04 Active
452799601 Compressor Jacket ONG3-9 1 21 05-Mar-04 Active
4514091 Grommet 1 23 05-Mar-04 Active
4510677 Nut With Flange M8 -D=24 1 24 05-Mar-04 Active
4527008 Wire assy 1 25 05-Mar-04 Active
4524230 Compressor assy. GK113PAG 1 26 05-Mar-04 Active
4516826 Rubber washer 1 27 05-Mar-04 Active
4516825 Cover Terminal 1 28 05-Mar-04 Active
4514089 Nut hex 1 29 05-Mar-04 Active
433229 cover valve 1 30 05-Mar-04 Active
433234 Clamp 1 31 05-Mar-04 Active
4519606 Right side panel (painting plate) 1 32 05-Mar-04 Active
4527135 4-Way Valve & Tube Assy 1 33 05-Mar-04 Active
433228 Back Side Net 1 34 05-Mar-04 Active
433216 Bridge 1 35 05-Mar-04 Active
4527155 condensor Soldering assy 1 36 05-Mar-04 Active
4519614 Painting Top Cover 1 37 05-Mar-04 Active
4519300 Nut M5 L 1 38 05-Mar-04 Active
433225 Handle 1 39 05-Mar-04 Active
4519607 Left Side Panel Painting Plate 1 40 05-Mar-04 Active