Electra LEX 25 DCI Service Manual
  1. Manuals
  2. Brands
  3. Electra Manuals
  4. Air Conditioner
  5. LEX 25 DCI
  6. Service manual

Electra LEX 25 DCI Service Manual

Lex dci series
Hide thumbs Also See for LEX 25 DCI:
Table of Contents

Advertisement

Quick Links

REFRIGERANT
R410A
SM LEXDCI 1-E.1 GB
LEX DCI Series
Outdoor Units
NOVEMBER - 2008
CONTENTS
DCI 25
DCI 35
DCI 50
DCI 60
DCI 72Z
HEAT PUMP

Advertisement

Table of Contents
loading

Related Manuals for Electra LEX 25 DCI

Summary of Contents for Electra LEX 25 DCI

  • Page 1: Table Of Contents

    LEX DCI Series Indoor Units Outdoor Units LEX 25 DCI DCI 25 LEX 35 DCI DCI 35 LEX 50 DCI DCI 50 LEX 60 DCI DCI 60 LEX 72 DCI DCI 72Z REFRIGERANT R410A HEAT PUMP NOVEMBER – 2008 SM LEXDCI 1-E.1 GB...
  • 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.
  • Page 3 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 REFRIGERATION DIAGRAMS ................9-1 10. ELECTRICAL CONNECTIONS ................10-1 11.

  • Page 4: Main Features

    INTRODUCTION INTRODUCTION General The new LEX DCI INVERTER split wall mounted range has expanded, comprising the following RC (heat pump) models: LEX 25 DCI ● LEX 35 DCI ● LEX 50 DCI ● LEX 60 DCI ● LEX 72 DCI ●...

  • Page 5: Introduction

    The indoor unit is wall mounted, and can be easily fitted to many types of residential and commercials applications. New design is available in LED version. Indoor Unit features: Feature LEX 25 DCI LEX 35 DCI LEX 50 DCI LEX 60 DCI LEX 72 DCI Display Ionizer Optional Optional...

  • Page 6: Tubing Connections

    INTRODUCTION Outdoor Unit The LEX DCI INV outdoor units can be installed as floor or wall mounted units by using a wall supporting bracket. The metal sheets are protected from 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.

  • Page 7: Indoor Units

    INTRODUCTION 1.11 Matching Table 1.11.1 R410A INDOOR UNITS OUTDOOR UNITS MODEL REFR” LEX 25 LEX 35 LEX 50 LEX 60 LEX 72 √ DCI 25 R410A √ DCI 35 R410A √ DCI 50 R410A √ DCI 60 R410A √ DCI 72Z R410A SM LEXDCI 1-E.1 GB CONTENTS...

  • Page 8: Lex 25 Dci Dci

    PRODUCT DATA SHEET PRODUCT DATA SHEET LEX 25 DCI Model Indoor Unit LEX 25 DCI Model Outdoor Unit DCI 25 R410A Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 8530(4780-12280) 11600(5120-17060) Capacity 2.5(1.4-3.6) 3.4(1.5-5.0) 0.595(0.42-1.0) 0.81(0.39-1.6) Power input 4.20...

  • Page 9: Lex 35 Dci Dci

    PRODUCT DATA SHEET LEX 35 DCI Model Indoor Unit LEX 35 DCI Model Outdoor Unit DCI 35 R410A Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 11940(4780-14670) 14670(5100-19790) Capacity 3.5(1.4-4.3) 4.3(1.5-5.8) 0.99(0.42-1.25) 1.125(0.39-1.75) Power input 3.54 3.82 EER (Cooling) or COP (Heating) Energy efficiency class 220-240 Power supply...

  • Page 10: Lex 50 Dci Dci

    PRODUCT DATA SHEET LEX 50 DCI Model Indoor Unit LEX 50 DCI Model Outdoor Unit DCI 50 Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 17060(5120-20470) 20470(5120-25930) Capacity 5.00(1.50-6.00) 6.00(1.50-7.60) Power input 1.46(0.50-2.00) 1.66(0.45-2.20) EER (Cooling) or COP(Heating) 3.42 3.61 Energy efficiency class...
  • Page 11 PRODUCT DATA SHEET LEX 60 DCI Model Indoor Unit LEX-60 DCI Model Outdoor Unit DCI 60 Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 20470(5120-22860) 22180(5120-26950) Capacity 6.00(1.50-6.70) 6.50(1.80-7.90) Power input 1.99(0.50-2.20) 1.90(0.45-2.30) EER (Cooling) or COP(Heating) 3.02 3.42 Energy efficiency class Power supply...

  • Page 12: Lex 72 Dci

    PRODUCT DATA SHEET LEX 72 DCI Model Indoor Unit LEX 72 DCI Model Outdoor Unit GC-DCI 72 Z Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 23188(5100~25575) 25916(5100~30000) Capacity 6.8(1.5-7.5) 7.6(1.5~8.8) Power input 2.25(0.5-2.8) 2.35(0.45~3.0) EER (Cooling) or COP(Heating) 3.01 3.23 Energy efficiency class...

  • Page 13: Rating Conditions

    RATING CONDITIONS RATING CONDITIONS Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units). 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 14 OUTLINE DIMENSIONS OUTLINE DIMENSIONS Indoor Unit: LEX 25 / 35 DCI MOUNTING TEMPLATE CEELING TO BE USED FOR LOCATION OF INDOOR UNIT ON THE WALL INDOOR UNIT OUTLINE 810.0 MOUTING PLATE OUTLINE 30.0 167.5 167.5 70.0 93.0 TUBING WALL OPENING 93.0 (FOR REAR ROUTING) 70.0...
  • Page 15 OUTLINE DIMENSIONS Indoor Unit: LEX 50 / 60 / 72 1060 Outdoor Unit: DCI 60 SM LEXDCI 1-E.1 GB CONTENTS...

  • Page 16: Outline Dimensions

    OUTLINE DIMENSIONS Outdoor Unit: DCI 72 Z SM LEXDCI 1-E.1 GB CONTENTS...

  • Page 17: Performance Data & Pressure Curves

    PERFORMANCE DATA & PRESSURE CURVES PERFORMANCE DATA LEX 25 / DCI 25 5.1.1 Cooling Capacity (kW) - Run Mode ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC] OD COIL ENTERING AIR DB DATA 22/15 24/17 27/19 29/21 32/23 TEMPERATURE 80 - 110 % of nominal -10 - 20 80 - 105 % of nominal (protection range)
  • Page 18 PERFORMANCE DATA & PRESSURE CURVES 5.1.3 Heating Capacity (kW) - Run Mode) ID COIL ENTERING AIR DB TEMPERATURE [ºC] OD COIL ENTERING AIR DB/WB DATA TEMPERATURE [ºC] 2.16 2.01 1.86 -15/-16 0.49 0.54 0.58 2.41 2.26 2.11 -10/-12 0.59 0.64 0.68 2.59 2.44...
  • Page 19 PERFORMANCE DATA & PRESSURE CURVES Capacity Correction Factor Due to Tubing Length 5.2.1 Cooling 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 9 10 11 12 13 14 15 16 17 18 19 20 Tubing Length [m] 5.2.2 Heating 1.02...
  • Page 20 PERFORMANCE DATA & PRESSURE CURVES LEX 35 / DCI 35 5.3.1 Cooling Capacity (kW) - Run Mode ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC] OD COIL ENTERING AIR DB DATA 22/15 24/17 27/19 29/21 32/23 TEMPERATURE [ºC] 80 - 110 % of nominal -10 - 20 80 - 105 % of nominal (protection range)
  • Page 21 PERFORMANCE DATA & PRESSURE CURVES 5.3.3 Heating Capacity (kW) - Run Mode ID COIL ENTERING AIR DB TEMPERATURE [ºC] OD COIL ENTERING AIR DB/WB DATA TEMPERATURE [ºC] 2.74 2.55 2.35 -15/-16 0.68 0.74 0.81 3.05 2.86 2.66 -10/-12 0.81 0.88 0.95 3.28 3.09...
  • Page 22 PERFORMANCE DATA & PRESSURE CURVES Capacity Correction Factor Due to TUbing Length 5.4.1 Cooling 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 9 10 11 12 13 14 15 16 17 18 19 20 Tubing Length [m] 5.4.2 Heating 1.02...
  • Page 23 PERFORMANCE DATA & PRESSURE CURVES LEX 50 / DCI 50 5.5.1 Cooling Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ OD COIL 22/15 24/17 27/19 29/21 32/23 ENTERING AIR DB DATA TEMPERATURE [ 80 - 110 % of nominal...
  • Page 24 PERFORMANCE DATA & PRESSURE CURVES 5.5.3 Heating Capacity (kW) - Run Mode) 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ OD COIL ENTERING AIR DB/WB DATA TEMPERATURE [ 2.73 2.34 1.94 -15/-16 1.16 1.24 1.33 3.60 3.21...
  • Page 25 PERFORMANCE DATA & PRESSURE CURVES LEX 60 / DCI 60 5.6.1 Cooling Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ OD COIL 22/15 24/17 27/19 29/21 32/23 ENTERING AIR DB DATA TEMPERATURE [ 80 - 110 % of nominal...
  • Page 26 PERFORMANCE DATA & PRESSURE CURVES 5.6.3 Heating Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ OD COIL ENTERING AIR DB/WB DATA TEMPERATURE [ 2.96 2.53 2.11 -15/-16 1.33 1.42 1.52 3.90 3.48...
  • Page 27 PERFORMANCE DATA & PRESSURE CURVES LEX 72 / DCI 72Z 5.7.1 Cooling Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ OD COIL 22/15 24/17 27/19 29/21 32/23 ENTERING AIR DB DATA TEMPERATURE [ 80 - 110 % of nominal...
  • Page 28 PERFORMANCE DATA & PRESSURE CURVES 5.7.3 Heating Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ OD COIL ENTERING AIR DB/WB DATA TEMPERATURE [ 3.21 2.75 2.28 -15/-16 1.53 1.64 1.75 4.23 3.77...
  • Page 29 PERFORMANCE DATA & PRESSURE CURVES Capacity Correction Factor Due to Tubing Length 5.8.1 LEX 50 / 60 / 72 DCI: Cooling 1.02 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.86 Tubing length(m) 5.8.2 Heating 1.02 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.86...
  • Page 30 PERFORMANCE DATA & PRESSURE CURVES Pressure Curves 5.9.1. Model: LEX 50 / DCI 50 Cooling — Test Mode Suction Pressure VS.Outdoor Temp. 1100 1000 Indoor DB/WB Tem p' 2 2 / 1 5 2 4 / 1 7 2 7 / 1 9 2 9 / 2 1 3 2 / 2 3 Outdoor DB Temperature[ºC ]...
  • Page 31 PERFORMANCE DATA & PRESSURE CURVES 5.9.2. Heating — Test Mode Suction Pressure VS.Outdoor Temp. 1100 1000 Indoor DB Outdoor WB Temperature[ºC ] Discharge Pressure VS. Outdoor Temp. 4000 3500 Indoor DB 3000 2500 2000 1500 1000 Outdoor WB Temperature SM LEXDCI 1-E.1 GB 5-15 CONTENTS...
  • Page 32 PERFORMANCE DATA & PRESSURE CURVES — Test Mode 5.9.3 Model: LEX 60 / DCI 60 Cooling Suction Pressure VS.Outdoor Temp. 1100 1000 Indoor DB/WB Tem p' 2 2 / 1 5 2 4 / 1 7 2 7 / 1 9 2 9 / 2 1 3 2 / 2 3 Outdoor DB Temperature[ºC ]...
  • Page 33 PERFORMANCE DATA & PRESSURE CURVES 5.9.4 Heating — Test Mode Suction Pressure VS.Outdoor Temp. 1100 1000 Indoor DB Outdoor WB Temperature[ºC ] Discharge Pressure VS. Outdoor Temp. 4000 3500 3000 Indoor DB 2500 2000 1500 1000 Outdoor WB Temperature [ºC ] SM LEXDCI 1-E.1 GB 5-17 CONTENTS...
  • Page 34 PERFORMANCE DATA & PRESSURE CURVES — Test Mode 5.9.5 Model: LEX 72 / DCI 72 Z Cooling Suction Pressure vs. Outdoor Temperature 1000 Indoor DB/WB 22/15 24/17 27/19 29/21 32/23 Outdoor DB Temperature Discharge Pressure vs. Outdoor Temperature Indoor 3750 DB/WB 3500 3250...
  • Page 35 PERFORMANCE DATA & PRESSURE CURVES 5.9.6 Heating — Test Mode Suction Pressure vs. Outdoor Temperature 1200 1100 1000 Indoor DB Outdoor WB Temperature Discharge Pressure vs. Outdoor Temperature 4000 3750 3500 3250 Indoor DB 3000 2750 2500 2250 2000 1750 1500 Outdoor WB Temperature SM LEXDCI 1-E.1 GB...

  • Page 36: Sound Level Characteristics

    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 25 LEX 35 -70NC -70NC -60NC -60NC -50NC -50NC -40NC -40NC -30NC -30NC APPROXIMATE APPROXIMATE THRESHOLD OF...
  • Page 37 SOUND LEVEL CHARACTERISTICS LEX 72 WNG 80 NC-70 NC-60 NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE BAND CENTER FREQUENCIES, Hz SM LEXDCI 1-E.1 GB CONTENTS...
  • Page 38 SOUND LEVEL CHARACTERISTICS Outdoor units Unit Mic. Ground Figure 2 Sound Pressure Level Spectrum (Measured as Figure 2) DCI 25 Cooling DCI 25 Heating DCI 35 Cooling DCI 35 Heating SM LEXDCI 1-E.1 GB CONTENTS...
  • Page 39 SOUND LEVEL CHARACTERISTICS DCI 50 Cooling DCI 50 Heating NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz DCI 60 Cooling DCI 60 Heating NC-70...
  • Page 40 SOUND LEVEL CHARACTERISTICS Sound Pressure Level Spectrum (Measured as Figure 2) DCI 72 Z Cooling DCI 72 Z Heating SM LEXDCI 1-E.1 GB CONTENTS...

  • Page 41: Electrical Data

    ELECTRICAL DATA ELECTRICAL DATA Single Phase Unit Model LEX 25 DCI LEX 35 DCI LEX 50 DCI LEX 60 DCI LEX 72 DCI Power Supply 1 PH ,220-240VAC ,50HZ Connected to To indoor To outdoor Maximum Current 13.5A 15.7A Inrush Current \ 45 A <35A...

  • Page 42: Wiring Diagrams

    WIRING DIAGRAMS WIRING DIAGRAMS Indoor & Outdoor Units: LEX 25, 35 / DCI 25, 35 SM LEXDCI 1-E.1 GB CONTENTS...
  • Page 43 WIRING DIAGRAMS Indoor Unit: LEX 50 / LEX 60 DCI Horizontal step motor Vertical step motor IFAN RAT ICT F resh A i r Ionizer capacitor 2uF 450V P11P15 ( red) P5(white) P6(White) P8 ( Red) P10(Red) Indoor unit controller PCB megatool Jumper PH-12...
  • Page 44 WIRING DIAGRAMS Indoor & Outdoor Units: LEX 72 DCI / DCI 72 SM LEXDCI 1-E.1 GB CONTENTS...
  • Page 45 WIRING DIAGRAMS Outdoor Unit: DCI 72 Z SM LEXDCI 1-E.1 GB CONTENTS...

  • Page 46: Refrigeration Diagrams

    REFRIGERATION DIAGRAMS REFRIGERATION DIAGRAMS Heat Pump Models 9.1.1 LEX 25, 35, 50, 60 / DCI 25, 35, 50, 60 Cooling Mode 9.1.2 LEX 25, 35, 50, 60 / DCI 25, 35, 50, 60 Heating Mode E E V SM LEXDCI 1-E.1 GB CONTENTS...

  • Page 47: Heating Mode

    REFRIGERATION DIAGRAMS 9.1.3 LEX 72 / DCI 72 Z OUTDOOR UNIT INDOOR UNIT Sensor Sensor Flared Valves connection Reverse valve Indoor coil Strainer Strainer Outdoor coil COOLING & DRY MODE OUTDOOR UNIT INDOOR UNIT Sensor Sensor Flared Valves connection Reverse valve Indoor coil Strainer...

  • Page 48: Electrical Connections

    ELECTRICAL CONNECTIONS ELECTRICAL CONNECTIONS 10.1 LEX 25, 35, 50, 60 DCI ESF-PWR COOL ESF-EN HEAT RESET MODE 1. Indoor unit terminal 5. Multiple wire cable. 2. Ground wire. 6. Cable clamp. 3. Indoor coil. 7. Outdoor unit wire terminal. 4.Power cable in the indoor side. A.
  • Page 49 ELECTRICAL CONNECTIONS 10.2 LEX 72 DCI ESF-PWR COOL ESF-EN HEAT RESET MODE 1. Indoor unit terminal 5. Cable clamp. 2. Ground wire. 6. Outdoor unit wire terminal. 3. Indoor coil. 7. Power cable in the outdoor side 4. Multiple wire cable. (only for outdoor unit power supply) A.
  • Page 50 CONTROL SYSTEM CONTROL SYSTEM for LEX 25, LEX 35 DCI 11.1 General Functions and Operating Rules The DCI software is fully parametric. All the model dependent parameters are shown in Blue color and with Italic style [parameter]. The parameters values are given in the last section of this control logic chapter of the service manual.
  • Page 51 CONTROL SYSTEM Target frequency limits as a function of outdoor air temperature )OAT(: OAT Range Cool mode limits Heat mode limits < 6 MaxFreqAsOATC No limit 6 ≤ OAT < 15 MaxFreqAsOAT1H 15 ≤ OAT < 24 MaxFreqAsOAT2H 24 ≤ OAT No limit 11.1.4 Frequency Changes Control...
  • Page 52 CONTROL SYSTEM 11.1.8 Heating Element Control Heating element can be started if LOAD > * Maxi mumNLOAD AND Indoor Coil temperature <45. The heating element will be stopped when LOAD < MaximumNLOAD OR if Indoor Coil Temperature > 11.1.9 Outdoor Fan Control 7 outdoor fan speeds are determined for each model.
  • Page 53 CONTROL SYSTEM 11.1.13 Electro Static Filter )ESF( Control ESF is on when ESF switch is on, Safety switch is pressed, unit is on, AND indoor fan is on. 11.1.14 Base Heater Control When OAT is connected, Base Heater will be on when unit is in heating and OAT<2 When OAT is disconnected, Base Heater will be on when unit is in heating.
  • Page 54 CONTROL SYSTEM 11.4.2 Indoor Fan Control in Heat Mode Indoor fan speed depends on the indoor coil temperature: ICTST ICTVL ICTL ICTH ICTT 11.5 Auto Cool/Heat Mode When in auto cool heat mode unit will automatically select between cool and heat mode according to the difference between actual room temperature and user set point temperature )ΔT(.
  • Page 55 CONTROL SYSTEM 11.7.2 Indoor Coil over Heating Protection ICT Trend Fast Decreasing No Change Increasing Fast Decreasing Increasing > 53 <ICT ≤ 55 49 < ICT ≤ 53 47 < ICT ≤ 49 45 < ICT ≤ 47 Norm Norm 43 <...
  • Page 56 CONTROL SYSTEM 11.7.5 Heat Sink Over Heating Protection (NA for DCI 25 and 35) HST Trend Decreasing No Change Increasing > 90 85 < HST ≤ 90 82 < HST ≤ 85 80 < HST ≤ 82 78 < HST ≤ 80 Norm Norm HST ≤...
  • Page 57 CONTROL SYSTEM 11.7.6.2 Deicing Protection Procedure Threshold COMP max. 12 minutes HEAT COOL OFAN EEVDeicerOpen 36 seconds, T3 = 6 seco 11.8 Condensate Water Over Flow Protection Each of the pins P1, P2, P3 can have two options: 1 – When it is shorted with P4 0 –...
  • Page 58 CONTROL SYSTEM Water Level LEVEL4 LEVEL 3 LEVEL1 Pump NLOAD BLINK OPER LED NORMAL 11.8.2 1 Level Logic (used in all models except for floor/ceiling models) Level Don`t Normal care Don`t Overflow care Overflow when Overflow when unit is ON unit is OFF Overflow Water Level...
  • Page 59 CONTROL SYSTEM 11.10 Operating the Unit from the Mode Button Forced operation allows to start, stop and operate in Cooling or Heating, in pre-set temperature according to the following table: Forced operation Mode Pre-set Temperature Cooling Heating 11.11 On Unit Controls and Indicators 11.11.1 Indoor Unit Controller Controls and Indicators For All Models Except for Floor/Ceiling model...
  • Page 60 CONTROL SYSTEM 11.11.2 Indoor Unit Controls and Indicators for LCD Display STBY Cool Heat Auto SPT(1*) SPT(1*) SPT(1*) SPT(1*) SPT(1*) SPT(1*) OFF(2*) ON(2*) ON(2*) ON(2*) ON(2*) ON(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*) (Low) User User User User User (Med) setting setting setting...
  • Page 61 CONTROL SYSTEM 11.11.3 Indoor Unit Controller Controls and Indicators for Floor/Ceiling Model STANDBY Lights up when the Air Conditioner is connected to power and is ready INDICATOR for operation OPERATE 1. Lights up during operation. INDICATOR 2. Blinks for 300 msec., to announce that a R/C infrared signal has been received and stored.

  • Page 62: Test Mode

    CONTROL SYSTEM 11.12 Test Mode 11.12.1 Entering Test Mode System can enter Test mode in two ways: Automatically when the following conditions exists for 30 minutes continuously: Mode = Coo l, Set point 16, Room temper ature = 27±1, Outdoor temperature = 35±1 Mode = Heat, Set point = 30, Room temperature = 20±1, Outdoor temperature = 7±1 Manually when entering diagnostics with the following settings: Mode = Cool, Set point = 16...
  • Page 63 CONTROL SYSTEM 11.13 SW Parameters 11.13.1 Indoor Units SW Parameters General Parameters for All Models: Parameters defining the indoor fan speed as a function of Indoor Coil temperature in heat mode (ICT): ICTST Speed ICT to stop indoor fan ICTVLSpeed ICT to go down to very low speed ICTLSpeed ICT to start in very low speed...
  • Page 64 CONTROL SYSTEM 11.13.2 Outdoor Units SW Parameters Parameter Name DCI25 DCI35 DCI 50 DCI50 DUO Compressor Parameters MinFreqC MaxFreqC MinFreqH MaxFreqH Step1Freq Step2Freq Step3Freq Frequency limits as a function of outdoor air temperature MaxFreqAsOATC MaxFreqAsOAT1H MaxFreqAsOAT2H Compressor Over Heating Protection CTTOH1 CTTOH2 CTTOH3...
  • Page 65 CONTROL SYSTEM CONTROL SYSTEM for LEX 50, LEX 60, LEX 72 Z DCI 12.1 General Functions and Operating Rules The DCI software is fully parametric. All the model dependent parameters are shown in Blue color and with Italic style [parameter]. The parameters values are given in the last section of this control logic chapter of the service manual.
  • Page 66 CONTROL SYSTEM Target frequency limits as a function of outdoor air temperature (OAT): OAT Range Cooling Mode limits Heating Mode limits OAT < 6 No limit 6 ≤ OAT < 15 MaxFreqAsOATC MaxFreqAsOAT1H 15 ≤ OAT < 28 MaxFreqAsOAT2H 28≤ OAT No limit 12.1.3.2 Target Frequency Setting for DCI 72 / 80 The compressor Target Speed is calculated according to the following formula:...

  • Page 67: Sm Lexdci 1-E.1 Gb Contents

    CONTROL SYSTEM 12.1.5.2 Compressor starting control for DCI 72 / 80 Step 1 Whenever the compressor starts up, after it has been off for more than 45 minutes, the compressor frequency cannot go below Step1RPS for 3 continuous minutes (this rule comes to ensure oil return to the compressor).
  • Page 68 CONTROL SYSTEM OFAN Speed Compressor Routin Routin Routin Routin Target Frequency Freq=0 10 ≤ Freq < OFLowFreq OFLowFreq ≤ Freq< OFMedFreq Medium OFMedFreq≤ Freq High Medium When compressor is switched to OFF and the heat sink temperature is above 55 degrees, the outdoor fan will remain ON in low speed for up to 3 minutes.
  • Page 69 CONTROL SYSTEM 12.1.9.2 EEV Control for DCI 72 / 72 Z / 80 The target EEV value is the sum of open loop value (OL) and a result of the accumulative correction values (CV). ¦ The EEV intial value(OL) is defined as follow: = EEVBaseOpenLoop + EEVOpenLoopCpctyCrct + EEVTubeCompnst EEV tube Length Basic EEV open loop...
  • Page 70 CONTROL SYSTEM 12.3 Cool Mode NLOAD is calculated according to the difference between actual room temperature and user set point temperature by PI control. In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed. In AutoFan user setting, fan speed will be adjusted automatically according to the calculated NLOAD.
  • Page 71 CONTROL SYSTEM 12.6 Dry Mode As long as room temperature is higher then the set point, indoor fan will work in low speed and compressor will work between 0 and MaxNLOADIF1C Hz. When the room temperature is lower than the set point, compressor will be switched OFF and indoor fan will cycle 3 minutes OFF, 1 minute ON.
  • Page 72 CONTROL SYSTEM 12.7.2.2 Indoor Coil Overheating Protection For DCI 72 / 80 ICT Trend <-2 -1,0,1 >2 ICT >62 60 ≤ ICT < 62 58≤ ICT <60 56≤ ICT < 58 54≤ ICT < 56 Norm Norm 52≤ ICT ≤ 54 Norm Norm Norm...
  • Page 73 CONTROL SYSTEM 12.7.3.2 Compressor Overheating Protection for DCI 72 / 80 CTT Trend Fast Fast Decreasing Increasing Cool Heat Decreasing Change Increasing CTT >105 CTT >105 100≤ CTT < 100≤ CTT < 98≤CTT <100 95≤CTT <100 93≤CTT < 100 85≤CTT < 95 90≤CTT ≤...
  • Page 74 CONTROL SYSTEM 12.7.5.2 Heat Sink Overheating Protection For DCI 72 / 80 Delta HST <-2 -1,0,1 >2 HST≥ 81 79 ≤ HST < 81 75 ≤ HST < 79 73≤ HST< 75 71 ≤ HST ≤ 73 Norm Norm Norm HST <...
  • Page 75 CONTROL SYSTEM Deicing Operation Procedure ► O C T T h re s h o ld C O M P D e ic e F re q C h R V m a x. 1 2 m in u te s H E A T C O O L O F A N...
  • Page 76 CONTROL SYSTEM Deicing Operation Procedure ► Threshold COMP max. 12 minutes HEAT COOL OFAN EEVDeicerOpen T1=50 secondes;T2=36 secondes;T3=6 secondes 12.7.8 Condensate Water Over Flow Protection Each of the pins P1, P2, P3 can have two options: 1 – When it is shorted with P4 0 –...
  • Page 77 CONTROL SYSTEM Overflow when Overflow when unit is ON unit is OFF Overflow Water Level Normal OPER BLINK NLOAD is NLOAD forced to 0 PUMP 8 min 8 min 8 min 12.8 Indoor Unit Dry Contact Indoor unit Dry contact has two alternative functions that are selected by J9. Function Contact=open Contact=short...
  • Page 78 CONTROL SYSTEM 12.10 On Unit Controls and Indicators 12.10.1 Indoor Unit controller Controls and Indicatiors for All Models Except for Floor/Ceiling model During OFF, Fan, Cool, Heat, Dry, and Auto modes (for operation in other modes, see at the relevant spec paragraph): 1.
  • Page 79 CONTROL SYSTEM 12.11 Test Mode 12.11.1 Entering Test Mode System can enter Test mode in two ways: Automatically when the following conditions exists for 30 minutes continuously: Mode = Cool, Set point = 16, Room temperature = 27(+1/−2), Outdoor temperature = 35(+2/-1) Mode = Heat, Set point = 30, Room temperature = 20±1, Outdoor temperature = 7±(+1/-2) Manually when entering diagnostics with the following settings: Mode = Cool, Set point = 16...
  • Page 80 CONTROL SYSTEM Model dependent parameters - DNG Unit (DNG50) (DNG60) (DNG72) (DNG80) Cap .Group NomLoadC NomLoadH ICTSTSpeed ICTVLSpeed ICTLSpeed ICTHSpeed ICTTSpeed MaxNLOADIF1C MaxNLOADIF2C MaxNLOADIF3C MaxNLOADIF4C MaxNLOADIF5C MinRTC MaxNLOADRTC MaxNLOADIF1H MaxNLOADIF2H MaxNLOADIF3H MaxNLOADIF4H MaxNLOADIF5H MaxNLOADRTH MaxRTH MaxNLOADPSC MaxNLOADPSH Model dependent parameters - WNG (WNG) Wall Mounted Models Parameter name NLOAD limits as a function of selected indoor fan speed...
  • Page 81 CONTROL SYSTEM Model dependent parameters - PXD Unit (PXD50) (PXD60) (PXD72) (PXD80) Cap .Group NomLoadC NomLoadH MaxNLOADIF1C MaxNLOADIF2C MaxNLOADIF3C MaxNLOADIF4C MaxNLOADIF5C MinRTC MaxNLOADRTC MaxNLOADIF1H MaxNLOADIF2H MaxNLOADIF3H MaxNLOADIF4H MaxNLOADIF5H MaxNLOADRTH MaxRTH MaxNLOADPSC MaxNLOADPSH SM LEXDCI 1-E.1 GB 12-17 CONTENTS...
  • Page 82 CONTROL SYSTEM 12.12.2 Outdoor Units SW Parameters: Model dependent parameters for DCI 50 / 60 Name Single DCI-50 Single DCI 60 MinFreqC MaxFreqC MinFreqH MaxFreqH NormAccel NormDecel Step1Freq Step2Freq Step3Freq OFVL OFLOWC OFMEDC OFMAXC OFLOWH OFMEDH OFMAXH OFANTESTMODEC OFANTESTMODEH OFDelTestMode CTTOH1 CTTOH2 CTTOH3...
  • Page 83 CONTROL SYSTEM Model dependent parameters for DCI 72 / 80 Model dependent parameters for DCI 72 Z Compressor Parameters Value Single Name DCI-72 Z MinOFFTime MinOnTime MinFreqC MaxFreqC MaxCTT1 MinFreqH MaxCTT2 MaxFreqH MinSpeedAsCTT1 Step1Freq MinSpeedAsCTT2 Step2Freq MaxSpeedC Step3Freq MaxSpeedH OFMinRPM Step1RPS OFMaxRPM NightRPM...

  • Page 84: Troubleshooting

    TROUBLESHOOTING TROUBLESHOOTING 13.1 Troubleshooting for DCI 25 / 35 / 50 / 60 / 72Z WARNING!!! When Power Up – the whole outdoor unit controller, including the wiring, is under HIGH VOLTAGE!!! Never open the Outdoor unit before turning off the Power!!! When turned off, the system is still charged (400V)!!! It takes about 3 Min.
  • Page 85 TROUBLESHOOTING Symptom Probable Cause Corrective Action Check RV power connections, if Unit works in wrong mode Electronics or power (cool instead of heat or check RV operation with direct connection to RV heat instead of cool) 230VAC power supply, if OK, replace outdoor controller.
  • Page 86 TROUBLESHOOTING 13.1.3 Judgment by Indoor/Outdoor Unit Diagnostics Enter diagnostics mode - press for five seconds Mode button in any operation mode. Acknowledgment is by 3 short beeps and lights of COOL and HEAT LED’s. Then, every short pressing of Mode button will scroll between Indoor and Outdoor unit diagnostic modes by the acknowledgment of 3 short beeps and lighting of COOL and HEAT LED’s.
  • Page 87 TROUBLESHOOTING 13.1.4.1 Indoor Unit Diagnostics and Corrective Actions Fault Probable Cause Corrective Action Sensor failures of Check sensor connections or all types replace sensor Indoor and Outdoor Communication controllers are with Replace Indoor controller mismatch different versions Communication or Check Indoor to Outdoor No Communication grounding wiring is not wiring and grounding...
  • Page 88 TROUBLESHOOTING Fault Probable Cause Corrective Action Check the voltage - If there is no voltage between indoor fan replace main P.C.B terminals on the main P.C.B. The outdoor fan There is voltage between - Replace capacitor or motor. does not function outdoor fan terminals on correctly.
  • Page 89 TROUBLESHOOTING Fault Probable Cause Corrective Action - Overload safety device on compressor is cut - Check for proper voltage, out (low voltage or high switch off power and try No cooling or temperature) again after one hour. heating takes place, indoor - Compressor run - Replace compressor and outdoor fans...
  • Page 90 TROUBLESHOOTING 13.1.5 Outdoor Unit Diagnosits Problem OCT is disconnected OCT is shorted CTT is disconnected CTT is shorted HST is disconnected (when enabled) HST is shorted (when enabled) OAT is disconnected (when enabled) OAT is shorted (when enabled) TSUC is disconnected (when enabled) TSUC is shorted (when enabled) IPM Fault Bad EEPROM...
  • Page 91 TROUBLESHOOTING 13.1.6 Judgment by MegaTool MegaTool is a special tool to monitor the system states. Using MegaTool requires: A computer with RS232C port. A connection wire for MegaTool. A special MegaTool software. Use MegaTool according to following procedure: Setup MegaTool software: copy the software to the computer. Connect RS232C port in computer with MegaTool port in Indoor/Outdoor unit controller by the connection wire.
  • Page 92 TROUBLESHOOTING 13.1.8 Precaution, Advise and Notice Items 13.1.8.1 High voltage in Outdoor unit controller. Whole controller, including the wires that are connected to the Outdoor unit controller may have the potential hazard voltage when power is on. Touching the Outdoor unit controller may cause an electrical shock.
  • Page 93 TROUBLESHOOTING 13.2 Troubleshooting for DCI 72 / 80 WARNING!!! When Power Up – the whole outdoor unit controller, including the wiring, is under HIGH VOLTAGE!!! Never open the Outdoor unit before turning off the Power!!! When turned off, the system is still charged (400V)!!! It takes about 1 Min.
  • Page 94 TROUBLESHOOTING Symptom Probable Cause Corrective Action Check the connections No power supply and the wiring on the main terminal - Repair if needed. Outdoor unit display board and leds are off PFC Chock coil Check the PFC Chock coil Burnt fuse Check 20A fuse on the Filter EEV problem Check EEV...
  • Page 95 TROUBLESHOOTING Symptom Probable Cause Corrective Action Other home appliances operation is faulty such as noise appears EMC interference by in the television picture, or the Check for EMC problems the A/C unit picture is distorted or static occurs in the radio sound Specific problems of All others Check diagnostics...
  • Page 96 TROUBLESHOOTING Problem OCT bad CTT bad HST bad OAT bad OMT bad RGT bad OFAN/Compressor Feedback Loss OFAN- IPM fault OFAN Lock OFAN- Vospd exceeded Compressor- IPM Fault Compressor Lock Compressor- Vospd exceeded Compressor- Foldback DC under voltage DC over voltage AC under voltage No communication A reserved...
  • Page 97 TROUBLESHOOTING 13.2.3.2 Outdoor fault corrective actions Fault Name Probable Cause Corrective Action OCT bad CTT bad HST bad Thermistor not connected or Check Thermistor damaged OAT bad TSUC bad RGT bad OFAN halls or wires bad. OFAN/Compressor Check OFAN motor and Compressor wire cable bad or Feedback Loss compressor...
  • Page 98 TROUBLESHOOTING Fault Name Probable Cause Corrective Action No communication A No signals in line A Check communication Compressor- Ilegal Exceeds speed low limit See # 13 Speed System Configuration Communication lines changed No problem just an Changed from last operation announcement Miss-match between the IDUs connected to port A,B,C or D,...
  • Page 99 TROUBLESHOOTING 13.2.4 Fault Code for Indoor unit Pressing Mode button for long will activate diagnostic mode by the acknowledgment of 3 short beeps and lighting of COOL and HEAT LED’s. Entering diagnostics in STBY mode allows only viewing of status (fault-display). In diagnostic mode, system problems / information will be indicated by blinking of Heat &...
  • Page 100 TROUBLESHOOTING 13.2.4.1 Indoor unit diagnostics and corrective actions Fault Probable Cause Corrective Action Sensors not connected or Check sensor connections Sensor failures damaged or replace sensor Communication Indoor and Outdoor controllers Replace Indoor controller mismatch are with different versions Communication or grounding Check Indoor to Outdoor No Communication wiring is not good...
  • Page 101 TROUBLESHOOTING 13.2.5.4 Checking the Outdoor Fan Motor Check FAN-Power and FAN-Halls connections - Repair if needed. Rotate the fan slowly by hand. If the fan does not rotate easily, check whether something is obstructing the fan, or if the fan itself is coming into contact with the outer case, preventing it from rotating. Correct if necessary - otherwise, the fan motor bearings have seized.
  • Page 102 TROUBLESHOOTING 13.2.5.10 Checking for electromagnetic interferance (EMC problems) EMC troubles to the A/C unit Locations most susceptible to noise : 1. Locations near broadcast stations where there are strong electromagnetic waves. 2. Locations near amateur radio (short wave) stations. 3. Locations near electronic sewing machines and arc-welding machines. Trouble : Either of the following trouble may occur: 1.
  • Page 103 TROUBLESHOOTING 13.2.6.3 Advise: Open the Outdoor unit controller cover only after one minute from power off. Measure the electrolytic capacitors voltage before farther checking controller. Additional advises When disassemble the controller or the front panel, turn off the power supply. When connecting or disconnecting the connectors on the PCB, hold the whole housing, don’t pull the wire, there are sharp fringes and sting on shell.

  • Page 104: Exploded Views And Spare Parts Lists

    EXPLODED VIEWS AND SPARE PARTS LISTS EXPLODED VIEWS AND SPARE PARTS LISTS 14.1 Indoor Unit: LEX 25 / 35 DCI 14-1 SM LEXDCI 1-E.1 GB CONTENTS...
  • Page 105 EXPLODED VIEWS AND SPARE PARTS LISTS 14.2 Indoor Unit: LEX 25 DCI Description Quantity 465800016 A Grill A Assy./ Electra LEX 7/9/12/14 4518655 Air filter 4519132 ACTIVE CARBON FILTER ASSY 4519744 Low temperature catalys 465720059 Front Frame Assy./ LEX7/9/12/14 4526952...
  • Page 106 EXPLODED VIEWS AND SPARE PARTS LISTS 14.3 Indoor Unit: LEX 35 DCI Description Quantity 465100027 A Grill A Assy./Airwell LEX 25 35 DCI R4 4518655 Air filter 4519132 ACTIVE CARBON FILTER ASSY 465720059 Front Frame Assy./ LEX7/9/12/14 4526952 Screw Cover 4526389 R410A EVAPORATOR ASSY HPI DC 4527434...

  • Page 107: Outdoor Unit: Dci

    EXPLODED VIEWS AND SPARE PARTS LISTS 14.4 Outdoor Unit: DCI 25 / 35 14-4 SM LEXDCI 1-E.1 GB CONTENTS...
  • Page 108 EXPLODED VIEWS AND SPARE PARTS LISTS 14.5 Outdoor Unit: DCI 25 / 35 Part No. Description 433218 Front panel A 4526340 Air inlet ring-420 433223 Painting insulation plate 4526476 Axial fan OD=401 452889600 DC motor for DCI25/35 433215 Motor support 4523060 Base painting Assy.
  • Page 109 EXPLODED VIEWS AND SPARE PARTS LISTS 14.6 Indoor Unit: LEX 50 / 60 / 72 DCI 14-6 SM LEXDCI 1-E.1 GB CONTENTS...
  • Page 110 EXPLODED VIEWS AND SPARE PARTS LISTS 14.7 Indoor Unit: LEX 50 DCI Description Quantity 465720126 ASilk-ScreenGrillAAssy./LEX50/60/72AIRWE 465720136 ASilk-ScreenGrillAAssy./LEX50/60/72Electra 452919800 Filter 4518113 AIR FILTER ASSY 465020046 Front Frame/Lex-18 465340035 Screw Cover/Lex-18 453134600 Evaporator Assy. 452917300 Air outlet 4518664 Drain hose 452917500 Horizontal flap A 452917600 Horizontal flap B...
  • Page 111 EXPLODED VIEWS AND SPARE PARTS LISTS 14.8 Indoor Unit: LEX 60 DCI Description Quantity 465720126 ASilk-ScreenGrillAAssy./LEX50/60/72AIRWEL 465720136 ASilk-ScreenGrillAAssy./LEX50/60/72Electra 452919800 Filter 4518113 AIR FILTER ASSY 465020046 Front Frame/Lex-18 465340035 Screw Cover/Lex-18 453134600 Evaporator Assy. 452917300 Air outlet 4518664 Drain hose 452917500 Horizontal flap A 452917600 Horizontal flap B...
  • Page 112 EXPLODED VIEWS AND SPARE PARTS LISTS 14.9 Indoor Unit: LEX 72 DCI Description Quantity 465720126 ASilk-ScreenGrillAAssy./LEX50/60/72AIRWE 465720136 ASilk-ScreenGrillAAssy./LEX50/60/72Electra 452919800 Filter 4518113 AIR FILTER ASSY 465020046 Front Frame/Lex-18 465340035 Screw Cover/Lex-18 453260400 Evaporator Assy/WNG24 452917300 Air outlet 4518664 Drain hose 452917500 Horizontal flap A 452917600 Horizontal flap B...
  • Page 113 EXPLODED VIEWS AND SPARE PARTS LISTS 14.10 Outdoor Unit: DCI 50 14-10 SM LEXDCI 1-E.1 GB CONTENTS...
  • Page 114 EXPLODED VIEWS AND SPARE PARTS LISTS 14.11 Outdoor Unit: DCI 50 ItemNo. Part No. Description 433218 Front panel A 4526340 Air inlet ring-420 433223 Painting insulation plate 4526476 Axial fan OD=401 4526475 DC motor for DCI 50 4526457 Motor support 4527363 Base painting Assy.
  • Page 115 EXPLODED VIEWS AND SPARE PARTS LISTS 14.12 Outdoor Unit: DCI 60 14-12 SM LEXDCI 1-E.1 GB CONTENTS...
  • Page 116 EXPLODED VIEWS AND SPARE PARTS LISTS 14.13 Outdoor Unit: DСI 60 Item No. Part No. Description 4517144 FAN COVER PP+UV 452795700 PAINTED LEFT CABINET ASSY 4521642 Painted Right Cabinet and Isolation Assy. 4523141 M10 Hexagon locked nut M10 4526841 cusion for fan 4526510 FAN D=460mm (3 blade) 453026500...
  • Page 117 EXPLODED VIEWS AND SPARE PARTS LISTS 14.14 Outdoor Unit: DCI 72 Z 14-14 SM LEXDCI 1-E.1 GB CONTENTS...
  • Page 118 EXPLODED VIEWS AND SPARE PARTS LISTS 14.15 Outdoor Unit: DCI 72 Z Item Description Quan. 465100000 Grill/ DCI Trio 4523652 PAINTED LEFT CABINET ASSY 4523758 Nut M8 left 452960400 Outdoor Fan 461600023 4-Way Valve Assy. 4522509 4-way Valve Coil 4526522 FOUR-WAY VALVE R410A 466130002R DC Motor 70W 8P...

  • Page 119: 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 120: Appendix A

    APPENDIX A APPENDIX A INSTALLATION AND OPERATION MANUAL SM LEXDCI 1-E.1 GB 16-1 CONTENTS...

This manual is also suitable for:

Lex 60 dciDci 25Dci 35Dci 50Lex 35 dciDci 60 ... Show all

Table of Contents