Related Manuals for Electra LEX 7
Summary of Contents for Electra LEX 7
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Page 1: Service Manual
Service Manual LEX Series Indoor Units Outdoor Units LEX 7 ONG 7 LEX 9 ONG 9 LEX 12 ONG 12 LEX 14 ONG 14 REFRIGERANT R410A COOLING ONLY HEAT PUMP JANUARY - 2006 CONTENT... - Page 2 LIST OF EFFECTIVE PAGES LIST OF EFFECTIVE PAGES Note: Changes in the pages are indicated by a “Revision#” in the footer of each effected page (when none indicates no changes in the relevant page). All pages in the following list represent effected/ non effected pages divided by chapters.
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Page 3: Table Of Contents
TABLE OF CONTENTS Table of Contents INTRODUCTION ....................1-1 PRODUCT DATA SHEET ..................2-1 RATING CONDITIONS ..................3-1 OUTLINE DIMENSIONS ..................4-1 PERFORMANCE DATA & PRESSURE CURVES ..........5-1 SOUND LEVEL CHARACTERISTICS ..............6-1 ELECTRICAL DATA ....................7-1 WIRING DIAGRAMS .....................8-1 ELECTRICAL CONNECTIONS ................9-1 10. REFRIGERATION DIAGRAMS ................10-1 11. -
Page 4: Introduction
INTRODUCTION INTRODUCTION 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. •... -
Page 5: Indoor Unit
INTRODUCTION 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. •... -
Page 6: Product Data Sheet
Service valves” flare” type connection. • Interconnecting wiring terminal block. • Fresh air motor for LEX 7-14 (optional). • Tubing Connections Flare type interconnecting tubing to be produced on site. For further details please refer to the Installation Manual, APPENDIX A.S... - Page 7 INTRODUCTION 1.11 Matching Table 1.11.1 R410A INDOOR UNITS OUTDOOR UNITS MODEL REFRIGER. LEX7 LEX9 LEX12 LEX14 PXD9 PXD12 PXD15 ONG7 ST R410A √ ONG9 ST R410A √ √ √ ONG12 ST R410A √ √ √ ONG14 ST R410A √ √ √...
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Page 8: Rating Conditions
PRODUCT DATA SHEET PRODUCT DATA SHEET LEX 7 R410A Specification Model Indoor Unit LEX-7 Model Outdoor Unit ONG-7 Installation Method of Pipe Flared Characteristics Cooling Heating Units Cooling Only 7230 7400 Btu/hr 7230 Capacity 2.12 2.12 2.17 0.63 0.595 0.63 Power input 3.37... - Page 9 PRODUCT DATA SHEET LEX 9 R410A Specification Model Indoor Unit LEX-9 Model Outdoor Unit ONG-9 Installation Method of Pipe Flared Characteristics Units Cooling Only Cooling Heating Btu/hr 9280 9280 9890 Capacity 2.72 2.72 2.90 0.825 0.849 Power input 0.825 3.30 3.42 EER (Cooling) or COP(Heating) 3.30...
- Page 10 PRODUCT DATA SHEET LEX 12 R410A Specification Model Indoor Unit LEX-12 Model Outdoor Unit ONG-12 Installation Method of Pipe Flared Characteristics Units Cooling Only Cooling Heating 12210 14160 Btu/hr 12210 Capacity 3.58 3.58 4.15 1.112 1.112 1.145 Power input 3.22 3.62 3.22 EER (Cooling) or COP(Heating)
- Page 11 PRODUCT DATA SHEET LEX 14 R410A Specification Model Indoor Unit LEX-14 Model Outdoor Unit ONG-14 Installation Method of Pipe Flared Characteristics Cooling Heating Units Cooling Only Btu/hr 14400 14400 15010 Capacity 4.22 4.22 4.40 1.31 1.310 1.31 Power input 3.22 3.36 3.22 EER (Cooling) or COP(Heating)
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Page 12: Operating Limits
RATING CONDITIONS RATING CONDITIONS Standard conditions in accordance with ISO 5151, ISO 13253 (for ducted units) and EN 14511. Cooling: Indoor: C DB 19 C WB Outdoor: 35 C DB Heating: Indoor: C DB Outdoor: 7 C DB 6 C WB Operating Limits 3.1.1 R410A Indoor... -
Page 13: Outline Dimensions
OUTLINE DIMENSIONS OUTLINE DIMENSIONS LEX 7, 9, 12, 14 / ONG3 -7, 9, 12, 14 Service Manual - LEX Revision Y06-01 CONTENT... - Page 14 PERFORMANCE DATA & PRESSURE CURVES PERFORMANCE DATA & PRESSURE CURVES LEX7 / ONG7 R410A 5.1.1 Cooling Mode at 7.5m Tubing Connection. 230V : Indoor Fan at High Speed. Entering Air DB Entering Air WB/DB ID Coil( Data OD Coil( 15/21 17/24 19/27 21/29...
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Page 15: Performance Data & Pressure Curves
PERFORMANCE DATA & PRESSURE CURVES 5.1.2 Heating Mode at 7.5m Tubing Connection. 230V : Indoor Fan at High Speed. ENTERING AIR DB ID COIL( ENTERING WB OD COIL( 1.13 0.48 1.09 0.51 1.04 0.53 1.21 0.49 1.17 0.51 1.13 0.54 1.29 0.49 1.25... - Page 16 PERFORMANCE DATA & PRESSURE CURVES Pressure Curves. 5.3.1 Cooling. Suction Pressure VS.Outdoor Temp 14.0 15/21(WB/DB ºC) 13.0 17/24(WB/DB ºC) 19/27(WB/DB ºC) 12.0 21/29(WB/DB ºC) 23/32(WB/DB ºC) 11.0 10.0 Outdoor Temp.(DB Discharge Pressure VS.Outdoor Temp 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) Outdoor Temp.(DB...
- Page 17 PERFORMANCE DATA & PRESSURE CURVES 5.3.2 Heating. Discharge Pressure VS.Outdoor Temp 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) Outdoor Temp.(DB Discharge Pressure VS.Outdoor Temp 25 DB (ºC) 20 DB (ºC) 15 DB (ºC) Outdoor Temp.( WB Revision Y06-01 Service Manual - LEX CONTENT...
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Page 18: Optional Accessories
PERFORMANCE DATA & PRESSURE CURVES LEX9 / ONG9 R410A 5.4.1 Cooling Mode at 7.5m Tubing Connection. 230V : Indoor Fan at High Speed. Entering Air DB Entering Air WB/DB ID Coil( Data OD Coil( 15/21 17/24 19/27 21/29 23/32 2.87 2.97 3.04 3.11... - Page 19 PERFORMANCE DATA & PRESSURE CURVES 5.4.2 Heating Mode at 7.5m Tubing Connection. 230V : Indoor Fan at High Speed. ENTERING AIR DB ID COIL( ENTERING WB OD COIL( 1.52 0.68 1.46 0.72 1.41 0.76 1.64 0.70 1.58 0.73 1.52 0.77 1.74 0.70 1.68...
- Page 20 PERFORMANCE DATA & PRESSURE CURVES Pressure Curves. 5.6.1 Cooling. Suction Pressure VS.Outdoor Temp 14.0 15/21(WB/DB ºC) 13.0 17/24(WB/DB ºC) 19/27(WB/DB ºC) 12.0 21/29(WB/DB ºC) 11.0 23/32(WB/DB ºC) 10.0 Outdoor Temp.(DB Discharge Pressure VS.Outdoor Temp 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) Outdoor Temp.(DB...
- Page 21 PERFORMANCE DATA & PRESSURE CURVES 5.6.2 Heating. Suction Pressure VS.Outdoor Temp 12.0 11.0 10.0 15 DB (ºC) 20 DB (ºC) 25 DB (ºC) Outdoor Temp.( WB Discharge Pressure VS.Outdoor Temp 25 DB (ºC) 20 DB (ºC) 15 DB (ºC) Outdoor Temp.( WB Revision Y06-01 Service Manual - LEX CONTENT...
- Page 22 PERFORMANCE DATA & PRESSURE CURVES LEX12 / ONG12 R410A 5.7.1 Cooling Mode at 7.5m Tubing Connection. 230V : Indoor Fan at High Speed. Entering Air DB Entering Air WB/DB ID Coil( Data OD Coil( 15/21 17/24 19/27 21/29 23/32 3.77 3.91 4.00 4.10...
- Page 23 PERFORMANCE DATA & PRESSURE CURVES 5.7.2 Heating Mode at 7.5m Tubing Connection. 230V : Indoor Fan at High Speed. ENTERING AIR DB ID COIL( ENTERING WB OD COIL( 2.18 0.92 2.10 0.98 2.01 1.02 2.34 0.94 2.26 0.99 2.18 1.04 2.49 0.95 2.41...
- Page 24 PERFORMANCE DATA & PRESSURE CURVES Pressure Curves. 5.9.1 Cooling. Suction Pressure VS.Outdoor Temp 14.0 15/21(WB/DB ºC) 13.0 17/24(WB/DB ºC) 19/27(WB/DB ºC) 12.0 21/29(WB/DB ºC) 11.0 23/32(WB/DB ºC) 10.0 Outdoor Temp.(DB Discharge Pressure VS.Outdoor Temp 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) Outdoor Temp.(DB...
- Page 25 PERFORMANCE DATA & PRESSURE CURVES 5.9.2 Heating. Suction Pressure VS.Outdoor Temp 11.0 10.0 15 DB (ºC) 20 DB (ºC) 25 DB (ºC) Outdoor Temp.( WB Discharge Pressure VS.Outdoor Temp 25 DB (ºC) 20 DB (ºC) 15 DB (ºC) Outdoor Temp.( WB 5-12 Revision Y06-01 Service Manual - LEX...
- Page 26 PERFORMANCE DATA & PRESSURE CURVES 5.10 LEX14 / ONG14 R410A 5.10.1 Cooling Mode at 7.5m Tubing Connection. 230V : Indoor Fan at High Speed. Entering Air DB Entering Air WB/DB ID Coil( Data OD Coil( 15/21 17/24 19/27 21/29 23/32 4.45 4.61 4.72...
- Page 27 PERFORMANCE DATA & PRESSURE CURVES 5.10.2 Heating Mode at 7.5m Tubing Connection. 230V : Indoor Fan at High Speed. ENTERING AIR DB ID COIL( ENTERING WB OD COIL( 2.31 0.90 2.22 0.96 2.13 1.01 2.49 0.93 2.40 0.98 2.31 1.03 2.64 0.94 2.55...
- Page 28 PERFORMANCE DATA & PRESSURE CURVES 5.12 Pressure Curves. 5.12.1 Cooling. Suction Pressure VS.Outdoor Temp 14.0 15/21(WB/DB ºC) 13.0 17/24(WB/DB ºC) 19/27(WB/DB ºC) 12.0 21/29(WB/DB ºC) 11.0 23/32(WB/DB ºC) 10.0 Outdoor Temp.(DB Discharge Pressure VS.Outdoor Temp 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) Outdoor Temp.(DB...
- Page 29 PERFORMANCE DATA & PRESSURE CURVES 5.12.2 Heating. Suction Pressure VS.Outdoor Temp 11.0 10.0 15 DB (ºC) 20 DB (ºC) 25 DB (ºC) Outdoor Temp.( WB Discharge Pressure VS.Outdoor Temp 25 DB (ºC) 20 DB (ºC) 15 DB (ºC) Outdoor Temp.( WB 5-16 Revision Y06-01 Service Manual - LEX...
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Page 30: Sound Level Characteristics
SOUND LEVEL CHARACTERISTICS Sound Pressure Level Unit Wall 0.8m FAN SPEED LINE Mic. Figure 1 Sound Pressure Level Spectrum (Measured as Figure 1) LEX 7 RC LEX 9 RC LEX 12 RC LEX 14 RC Service Manual - LEX Revision Y06-01 CONTENT... - Page 31 SOUND LEVEL CHARACTERISTICS Outdoor units Unit Mic. Ground Figure 2 Sound Pressure Level Spectrum (Measured as Figure 2) ONG 7 RC Cooling ONG 7 RC Heating ONG 9 RC Cooling ONG 9 RC Heating Revision Y06-01 Service Manual - LEX CONTENT...
- Page 32 SOUND LEVEL CHARACTERISTICS ONG 12 RC Cooling ONG 12 RC Heating ONG 14 RC Cooling ONG 14 RC Heating Service Manual - LEX Revision Y06-01 CONTENT...
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Page 33: Electrical Data
ELECTRICAL DATA ELECTRICAL DATA Single Units MODEL LEX 7 LEX 9 To indoor To outdoor To indoor To outdoor Power Supply 1PH-230V-50Hz 1PH-230V-50Hz Max Current, (A) Circuit Breaker,(A) 10.0 10.0 Power Supply Wiring. 3 x 1.5 mm 3 x 1.5 mm (No. -
Page 34: Wiring Diagrams
WIRING DIAGRAMS WIRING DIAGRAMS NOTE Wiring diagram lables as shown on units. Indoor Unit: LEX 7,9,12,14 fully feature 8.1.1 Indoor Unit: LEX 7,9,12,14 basic Service Manual - LEX Revision Y06-01 CONTENT... - Page 35 WIRING DIAGRAMS Outdoor Unit: ONG7 RC R410A Outdoor Unit: ONG7ST, 9ST/RC, 12ST/RC, 14ST/RC R410A Revision Y06-01 Service Manual - LEX CONTENT...
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Page 36: Electrical Connections
ELECTRICAL CONNECTIONS ELECTRICAL CONNECTIONS LEX 7, 9, 12, 14 R410A Service Manual - LEX Revision Y06-01 CONTENT... -
Page 37: Refrigeration Diagrams
REFRIGERATION DIAGRAMS REFRIGERATION DIAGRAMS 10.1 Heat Pump Models 10.1.1 LEX 7 R410A Service Manual - LEX Revision Y06-01 10-1 CONTENT... - Page 38 REFRIGERATION DIAGRAMS 10.1.2 LEX 9, 12, 14 R410A 10-2 Revision Y06-01 Service Manual - LEX CONTENT...
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Page 39: Tubing Connections
TUBING CONNECTIONS TUBING CONNECTIONS TUBE (Inch) ¼” ⅜” ½” ⅝” ¾” TORQUE (Nm) Flare Nuts 11-13 40-45 60-65 70-75 80-85 Valve Cap 13-20 13-20 18-25 18-25 40-50 Service Port Cap 11-13 11-13 11-13 11-13 11-13 Valve Protection Cap-end Refrigerant Valve Port (use Allen wrench to open/close) Valve Protection Cap Refrigerant Valve Service Port Cap... -
Page 40: Control System
CONTROL SYSTEM 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. - Page 41 CONTROL SYSTEM 12.2 Legend - Alternate Current - Air-Conditioner - ON or OFF status CLOCK - ON/OFF Operation Input, (dry contact) COMP - Compressor - Central Processing Unit ELUM - Extended Louver Upward Movement (Software Jumper) E²PROM, EEP - Erase Enable Programmable Read Only Memory - Heating Element - High Pressure Control - Hardware...
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Page 42: General Functions
CONTROL SYSTEM 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 Min operation time of Operation Mode COMP... - Page 43 CONTROL SYSTEM 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 •...
- Page 44 CONTROL SYSTEM 12.4.6.2 Cases for disabling thermistor short/disconnected detection 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.
- Page 45 CONTROL SYSTEM 12.5 Cooling Mode - General Room Temperature, RT, is detected by • RAT in normal operation, or • RCT (R/C sensor) in I-FEEL mode. The resolution of RT is 1 • RT is activating COMP/WVL if (RT > SPT), and •...
- Page 46 CONTROL SYSTEM 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) [ COMP (WVL) OFAN...
- Page 47 CONTROL SYSTEM 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) [ COMP (WVL)
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Page 48: Heating Mode
CONTROL SYSTEM 12.6 Heating Mode 12.6.1 Heating Mode - General • In heating Mode, temp. compensation schedule will be activated for wall mounted units. Add to SPT SPT [ I-FEEL ON I-FEEL OFF 18 ≤ SPT ≤ 27 27 < SPT ≤ 30 Notes : •... - Page 49 CONTROL SYSTEM 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 c, and is activated again when ICT ≤ 45 • In SH or RC group, HE operation is limited by the following graph: General : ICT [...
- Page 50 CONTROL SYSTEM 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) [ COMP (WVL)
- Page 51 CONTROL SYSTEM 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) [ COMP (WVL)
- Page 52 CONTROL SYSTEM 12.6.6 OFAN operation is controlled by the graph below when 1. (RAT ≥ SPT – 2 c), AND 2. (ICT ≥ 45 c), AND 3. (COMP is ON) Otherwise, OFAN runs together with COMP. OCT [ OFAN Service Manual - LEX Revision Y06-01 12-13 CONTENT...
- Page 53 CONTROL SYSTEM 12.7 Automatic Cooling or Heating 12.7.1 Automatic Cooling or Heating - General • Switching-temperature between Cooling and Heating is SPT ± 3 • Autofan in Automatic Cooling and Heating Mode will activate “Cooling with Autofan Mode” and “Heating with Autofan Mode” respectively. •...
- Page 54 CONTROL SYSTEM 12.7.2 Auto Cooling or Heating, RC or SH Groups Mode: Auto Temp: Selected desired temperature Fan: Timer: Any I Feel: On or Off Control function Maintains room temp at desired level by selecting between cooling and heating modes. (RT - SPT) [ Auto Heat Mode Auto Cool Mode...
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Page 55: Dry Mode
CONTROL SYSTEM 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: Control function Reduce room humidity with minimum temp. fluctuations by operating in Cool Mode with low speed IFAN. - Page 56 CONTROL SYSTEM 12.9 Protection 12.9.1 Cooling Mode Protections Indoor Coil Defrost Mode: Cooling, Dry, Auto Temp: Selected desired temp. Fan: Timer: Any I Feel: On or Off Control Function Protect the indoor coil from ice formation at low ambient temperature. ICT [ OFAN COMP...
- Page 57 CONTROL SYSTEM 12.3.2 High Pressure Protection Mode: (Auto) Cooling or Dry Temp: Selected desired temp. Fan: 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.
- Page 58 CONTROL SYSTEM 12.9.3 Heating Mode Protections Outdoor coil Deicing (excluding RH Group) Mode: Heating, Auto (at heating) Temp: Selected desired Temp Fan: Timer: Any I FEEL: 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.
- Page 59 CONTROL SYSTEM Deicing procedure OCT [ (DDT) 3 min 3 min max 12 min. COMP DI (note 1) DI (note 2) OFAN IFAN is forced to Low Speed IFAN HEs are forced ON IFAN Note 3 HEs are forced OFF OPER BLINK Notes :...
- Page 60 CONTROL SYSTEM 12.9.4 High pressure protection (excluding RH Group) Mode: (Auto) Heating Fan: Timer: Any I Feel: On or Off Control Function Protect the Compressor from high pressure by switching OFF the OFAN and COMP. ICT [ For all models except WAX For WAX model COMP is forced OFF COMP...
- Page 61 CONTROL SYSTEM 12.10 Timer Mode: Any Temp. Selected desired temp Fan: 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.
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Page 62: Forced Operation
CONTROL SYSTEM 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: Pre-set Temp for : Forced operation mode WMF, WMN, WNG models Cooling 22°C Heating 28°C Note: •... -
Page 63: Sleep Mode
CONTROL SYSTEM 12.12 Sleep Mode Mode: Any Temp: Set – desired temperature selected Fan: 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. - Page 64 CONTROL SYSTEM 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.
- Page 65 CONTROL SYSTEM 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. 12-26 Revision Y06-01 Service Manual - LEX CONTENT...
- Page 66 CONTROL SYSTEM 12.14 Controller Self-Test Procedure 12.14.1 By Shorting Test Jumper J1 SELF-TEST FLOW CHART FOR CONTROLLER (VERSION 4V5 OR HIGHER) SHORT JUMPER Step 1 RC/ST TEST (CONTROL PCB) MODEL CONFIGURATION TEST PRESS ON Step 2 POWER STEP MOTOR TEST BUTTON FREQUENCY TEST...
- Page 67 CONTROL SYSTEM 12.14.2 By Remote Control Settings: 1: TURNING ON THE POWER. Turn ON the power, make sure that the unit is in operation. 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.
- Page 68 CONTROL SYSTEM 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...
- Page 69 CONTROL SYSTEM 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. STEP 9: MEMORY TEST (EEPROM) •...
- Page 70 CONTROL SYSTEM 12.15 On Unit Indicators and Controls Lights up when the Air Conditioner is connected to power and STAND BY ready to receive the R/C commands INDICATOR Blinks continuously in case of any thermistor failure. Lights up during operation. Blinks for 300 ms, to announce that a R/C infrared signal has been received and stored.
- Page 71 CONTROL SYSTEM 12.16 Clock Random Delay From 0 to 2.5 seconds Clock Switch Open Clock Switch close The Clock is activate according to the following table: A/C STATE CLOCK STATE CLOCK ACTION A/C NEW STATE (clock is changed) (after clock is changed) before clock is changed) before clock is changed) OFF by...
- Page 72 CONTROL SYSTEM 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.
- Page 73 CONTROL SYSTEM 12B. CONTROL SYSTEM LEX 7-14 LED FULLY FEATURED 12B.1 General Functions 12B.1.1 Operation Modes Auto Mode Cooling Mode Drying Mode Fan Mode Heating Mode 12B.1.2 Functions I FEEL, Forced Mode, Protection - hot keep, Deicing, defrosting, Timer, Sleep,...
- Page 74 CONTROL SYSTEM 12B.2 Operation Modes 12B.2.1 Auto Mode Operation Heating / Fan Drying Cooling 22ºC 26ºC If RT >= 26ºC - A/C will go into Cooling Mode; Initial SPT is 25ºC. If 22ºC < RT < 26ºC- A/C go into Drying mode; Initial SPT is 24ºC. If RT <= 22ºC - A/C will go into Heating Mode;...
- Page 75 CONTROL SYSTEM 12B.2.3 Comp’ Operation COMP SPT-1ºC SPT+1ºC If RT >= SPT+1ºC, COMP and OFAN is activated; If RT <= SPT-1ºC, COMP stop, OFAN will turn off after 5 seconds delay. Note: COMP turns off have 3 min delay protection; COMP turn on have 5 min continues protection.
- Page 76 CONTROL SYSTEM High Pressure Protection (Excluding cooling only unit type) 12B.2.5 OCT (ºC) >= 3 min COMP Any OFAN follows COMP OFAN FORCED ON OFAN Any IFAN Any If (OCT >= 61ºC), IFAN is forced to LOW. If (OCT <= 55ºC), IFAN restore to normal.
- Page 77 CONTROL SYSTEM 12B.2.7 Drying Mode SPT range: 16ºC~30ºC. Initial: 24ºC; IFAN speed range: Auto, Low, Mid and Hi. Initial speed: Low; IFAN speed can be changed only in state (1); State SPT-1ºC SPT SPT+2ºC SPT+3ºC If in state (1) - (SPT - 1ºC < RT <= SPT + 2ºC), unit will go into state (2) If in state (1) or state (2), - (RT <= SPT - 1ºC), unit will go into state (3) If in state (3), - (SPT <= RT <...
- Page 78 CONTROL SYSTEM 12B.2.8 Heating Mode SPT range: 16ºC~30ºC. Initial: 24ºC; In wall mounted units the indoor RT compensation temp’ value is - 3ºC -> RT, (Excluding I FEEL Mode) IFAN speed range: Auto, Low, Mid and Hi. Initial speed: Low; Auto Fan IFAN SPT-4ºC SPT-3ºC SPT-2ºC SPT-1ºC...
- Page 79 CONTROL SYSTEM 12B.2.10 Hot keep function COMP on, IFAN set speed Supper low 21ºC 23ºC 32ºC 38ºC 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 21ºC...
- Page 80 CONTROL SYSTEM 12B.2.12 High Pressure Protection ICT (ºC) >= 10s >= 3 Min COMP Any OFAN Any If ICT >= 61ºC, OFAN turn off. If ICT <= 55ºC, OFAN turn on. If (ICT >= 66ºC) for duration of 10 seconds, COMP turn off. If ICT <= 52ºC, COMP turn on.
- Page 81 CONTROL SYSTEM 12B.2.14 Deicing Deicing starts, if OCT <= -6ºC and meets with one of the following conditions: 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; ICT <...
- Page 82 CONTROL SYSTEM 12B.3 Other Functions 12B.3.1 Sleep Function Cooling or drying Mode SPT + 2ºC SPT + 1ºC Standby Heating Mode SPT - 2ºC SPT - 3ºC 1 hour 1 hour 6 hours After 8 hours, it will go into Standby. Note: During sleep mode, IFAN speed can be set by RC command.
- Page 83 CONTROL SYSTEM 12B.3.3 I FEEL 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.
- Page 84 CONTROL SYSTEM Louvers control 12B.3.7 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;...
- Page 85 CONTROL SYSTEM Sound Indication 12B.3.10 The buzzer will beep twice when starts and a long sound when stops, one sound for receiving a command. Emergency Function 12B.3.11 The first press on the emergency key on the indoor control board, the unit enters to cooling mode (SPT: 22ºC;...
- Page 86 CONTROL SYSTEM 12B.3.15 Protection 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...
- Page 87 CONTROL SYSTEM 12B.3.19 Self-test When shorting the TEST jumper, the action will be per 1 second according to following: 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->...
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Page 88: Troubleshooting
TROUBLESHOOTING TROUBLESHOOTING SYMPTON PROBABLE CAUSE CORRECTIVE ACTION The stand-by There is no correct voltage -If the voltage is low repair power indicator (red led) between the line and neutral supply. on the central terminals on main P.C.B control display -If there is no voltage repair panel doesn’t light general wiring. - Page 89 TROUBLESHOOTING SYMPTON PROBABLE CAUSE CORRECTIVE ACTION No cooling or Outdoor fan motor faulty or -Replace P.C.B. heating only other fault caused, compressor -Outdoor fan blocked remove indoor fan works. overload protection cut out. obstructions. Only indoor fan Outdoor fan blocked. -Remove obstructions.
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Page 90: Exploded Views And Spare Parts Lists
EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.2 Indoor Unit LEX 7, 9, 12, 14 LED Qty. Description Grill A Assy./LEX7/9/12/14 AIRWELL . 465800009 465800016 Grill A Assy./ Electra LEX 7/9/12/14 465800020 Grill A Assy./ LEX7/9/12/14 Bosch Grill A Assy./ LEX7/9/12/14 Siemens... - Page 91 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.3 Outdoor Unit ONG 7, 9, 12 ST Service Manual - LEX Revision Y06-01 14-3 CONTENT...
- Page 92 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.4 Outdoor Unit ONG 7 ST Drawing Code Item Desc Quantity Number Effective From Effective To 433218 Front Panel A 05-Mar-04 Active 433221 Air Inlet Ring-420 05-Mar-04 Active 433223 Painting Insulation Plate 05-Mar-04 Active 4519251 Axial Fan OD=400 05-Mar-04...
- Page 93 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.5 Outdoor Unit ONG 9 ST Drawing Item Code Item Desc Quantity Number Effective From Effective To 433218 Front Panel A 05-Mar-04 Active 433219 Front Panel A1 05-Mar-04 05-Mar-04 433221 Air Inlet Ring-420 05-Mar-04 Active 433223 Painting Insulation Plate...
- Page 94 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.6 Outdoor Unit ONG 12 ST Drawing Item Code Item Desc Quantity Number Effective From Effective To 433218 Front Panel A 15-Nov-03 13-Jan-04 433219 Front Panel A1 13-Jan-04 Active 433221 Air Inlet Ring-420 15-Nov-03 Active 433223 Painting Insulation Plate...
- Page 95 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.7 Outdoor Unit ONG 14 ST Service Manual - LEX Revision Y06-01 14-7 CONTENT...
- Page 96 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.8 Outdoor Unit ONG 14 ST Drawing Effective Item Code Item Desc Quantity Number Effective From 433219 Front Panel A1 01-Mar-04 15-Mar-04 433218 Front Panel A 15-Mar-04 Active 433221 Air Inlet Ring-420 01-Mar-04 Active 433223 Painting Insulation Plate 01-Mar-04...
- Page 97 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.9 Outdoor Unit ONG 7 RC Service Manual - LEX Revision Y06-01 14-9 CONTENT...
- Page 98 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.10 Outdoor Unit ONG 7 RC Drawing Item Code Item Desc Quantity Number Effective From Effective To 433218 Front Panel A 05-Mar-04 Active 433219 Front Panel A1 05-Mar-04 05-Mar-04 433221 Air Inlet Ring-420 05-Mar-04 Active 433223 Painting Insulation Plate...
- Page 99 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.11 Outdoor Unit ONG 9,12 RC Service Manual - LEX Revision Y06-01 14-11 CONTENT...
- Page 100 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.12 Outdoor Unit ONG 9 RC Drawing Item Code Item Desc Quantity Number Effective From Effective To 433218 Front Panel A 05-Mar-04 Active 433219 Front Panel A1 05-Mar-04 05-Mar-04 433221 Air Inlet Ring-420 05-Mar-04 Active 433223 Painting Insulation Plate...
- Page 101 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.13 Outdoor Unit ONG 12 RC Drawing Item Code Item Desc Quantity Number Effective From Effective To 433218 Front Panel A 05-Mar-04 Active 433219 Front Panel A1 05-Mar-04 05-Mar-04 433221 Air Inlet Ring-420 05-Mar-04 Active 433223 Painting Insulation Plate...
- Page 102 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.14 Outdoor Unit ONG 14 RC 14-14 Revision Y06-01 Service Manual - LEX CONTENT...
- Page 103 EXPLODED VIEWS AND SPARE PARTS LISTS 14.1.15 Outdoor Unit ONG 14 RC Drawing Effective Item Code Item Desc Quantity Number Effective From 433219 Front Panel A1 23-Feb-04 15-Mar-04 433218 Front Panel A 15-Mar-04 Active 433221 Air Inlet Ring-420 23-Feb-04 Active 433223 Painting Insulation Plate 23-Feb-04...
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Page 104: Remote Control
OPTIONAL ACCESSORIES OPTIONAL ACCESSORIES 15.1 RCW Wall Mounted Remote Control 15.1.1 The RCW wall mounted remote control can be fitted to a large range and models, It can be used as IR (wirless mode) or wired controler. the RCW can control up to15 indoor units using the same settings (on its wired aplication), The max wiring length between the controller to the last indoor unit is 300m. - Page 105 OPTIONAL ACCESSORIES 15.2 RCW2 Wall Mounted Remote Cntrol 15.2.1 The RCW2 wall mounted remote controler is a wired controler that can provide affective controling management up to 15 different settings and temp’ zones. The RCW2 can be connected up to a max’ of 32 units,allowing a max wiring length of 1000m.
- Page 106 OPTIONAL ACCESSORIES 15.3 RCW/RCW2 Wiring Connections as Shown on Kit Service Manual - LEX Revision Y06-01 15-3 CONTENT...
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Page 107: Appendix A
APPENDIX A APPENDIX A INSTALLATION AND OPERATION MANUAL ► OPERATION MANUAL LEX 7,9,12,14 LED ► INSTALLATION MANUAL LEX 7,9,12,14 LED Service Manual - LEX Revision Y06-01 16-1 CONTENT... - Page 108 CONTENT...
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