Electra LEX 7 User 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
A ........................... 0
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1-1 - 1-4................ 0
2-1 - 2-4................ 0
3-1 ........................ 0
4-1 ........................ 0
5-1 - 5-16.............. 0
6-1 - 6-2................ 0
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12-1-12-33............ 0
13-1-13-2.............. 0
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
INDOOROUTDOOR
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