Service Manual. DCI PXD Series REFRIGERANT R410A HEAT PUMP

Transcription

1 Service Manual DCI PXD Series Indoor Units PXD 25 DCI PXD 35 DCI PXD 50 DCI Outdoor Units ONG 25 DCI ONG 35 DCI ONG 50 DCI REFRIGERANT R410A HEAT PUMP APRIL 2005

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. Dates of issue for original and changed pages are: Original April 2005 Total number of pages in this publication is 86 consisting of the following: Page No. Revision No. # Page No. Revision No. # Page No. Revision No. # Title... 0 A... 0 i 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 A Service Manual PXD DCI

3 TABLE OF CONTENTS Table of Contents 1. INTRODUCTION PRODUCT DATA SHEET RATING CONDITIONS OUTLINE DIMENSIONS PERFORMANCE DATA & PRESSURE CURVES ELECTRICAL DATA WIRING DIAGRAMS REFRIGERATION DIAGRAMS TUBING CONNECTIONS CONTROL SYSTEM TROUBLESHOOTING EXPLODED VIEWS AND SPARE PARTS LISTS APPENDIX A i

4 INTRODUCTION 1. INTRODUCTION 1.1 General The PXD split ceiling mounted range comprise the following RC (heat pump) models: PXD 25 DCI, PXD 35 DCI, PXD 50 DCI 1.2 Main Features The PXD series benefits from the most advanced technological innovations, namely: DC Inverter Technology R410A High COP. Extended temp operating range Low indoor and outdoor noise levels. Microprocessor control. Infrared remote control. Easy access to the interconnecting tubing and wiring connections, main control panel can slide out for service. Automatic treated air sweep. Networking Connectivity. Self diagnostics. Advanced diagnostics PC softwear m2ll Pre charged units till the max allowed tubing length. Easy installation and service. 1.3 Indoor Unit The indoor unit is a floor/ ceiling mounted, and can be easily fitted to many types of residential and commercials applications. It includes: Coil with hydrophilic aluminum fins. Motorized flaps (two step motors) Advanced electronic control box assembly (DCI storm) Mounting plate 1-1

5 INTRODUCTION 1.4 Filtration Easily accessible, and re-usable pre-filters (mesh) 1.5 Control The microprocessor indoor controller, and an infrared remote control, supplied as standard, providing complete operating function and programming. For further details please refer to the Operation Manual, Appendix A. 1.6 Outdoor Unit The PXD 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 : Compressor mounted in a soundproofed compartment : Rotary for PXD25 DCI and PXD35 DCI. Scroll for PXD50 DCI. 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. Advanced DC inverter controller. 1.7 Tubing Connections Flare type interconnecting tubing to be produced on site. For further details please refer to the Installation Manual, Appendix A 1.8 Inbox Documentation Each unit is supplied with its own installation and operation manuals. 1-2

6 INTRODUCTION 1.9 Matching Table R410A INDOOR UNITS OUTDOOR UNITS MODEL REFRIGER. WNG25 WNG35 WNG50 K25 K35 K50 PXD25 PXD35 PXD50 ONG25 DCI R410A ONG35 DCI R410A ONG50 DCI R410A The above table lists outdoor units and PXD DCI 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 and wall mounted. For further information please refer to the relevant Service Manual. 1-3

7 PRODUCT DATA SHEET 2. PRODUCT DATA SHEET 2.1 PXD 25 DCI R410A Model Indoor Unit PXD 25 DCI Model Outdoor Unit ONG-25 DCI Installation Method of Pipe Flared Characteristics Units Cooling Heating Capacity (1) Btu/hr 8530(4780~12280) 10920(5120~15350) kw 2.5( ) 3.2(1.5~4.5) Power input (1) kw 0.62( ) 0.93(0.4~1.6) EER (Cooling) or COP(Heating) (1) W/W Energy efficiency class A B Power supply V/Ph/Hz V/Single/50Hz Rated current A Starting current A 10.5 Circuit breaker rating A 35 Fan type & quantity Centrifugal x 2 Fan speeds H/M/L RPM 760/670/500 Air flow (2) H/M/L m3/hr 400/350/300 External static pressure Min-Max Pa 0 Sound power level (3) H/M/L db(a) 50/49/47 Sound pressure level (4 ) H/M/L db(a) 39/37/35 Moisture removal l/hr 1 Condenstate drain tube I.D mm 16 Dimensions WxDxH mm 820*190*630 Weight kg 21 Package dimensions WxDxH mm 890*280*710 Package weight kg 25 Units per pallet units 14units per pallet Units stacking units 7 levels Refrigerant control EEV Compressor type,model Single Rotary,DC Inverter,Panasonic 5RS102XAB Fan type & quantity Propeller(direct) x 1 Fan speeds H/L RPM 830 Air flow H/L m3/hr 1780 Sound power level H/L db(a) 61 Sound pressure level (4) H/L db(a) 51 Dimensions WxDxH mm 795*290*610 Weight kg 38 Package dimensions WxDxH mm 945*395*655 Packaged weight kg 42 Units per pallet Units 9 Stacking height units 3 levels Refrigerant type R410A Refrigerant chargless distance kg/m 1.10kg/7.5m Additional charge per 1 meter g/m No Need Liquid line In.(mm) 1/4"(6.35) Connections between units Suction line In.(mm) 3/8"(9.53) Max.tubing length m. Max.20 Max.height difference m. Max.10 Operation control type Remote control Heating elements (Option) kw Others INDOOR OUTDOOR (1) Rating conditions in accordance with ISO 5151 and ISO (for ducted units) and EN (2) Airflow in ducted units; at nominal external static pressure. (3) Sound power in ducted units is measured at air discharge. (4) Sound pressure level measured at 1 meter distance from unit. 2-1

8 PRODUCT DATA SHEET 2.2 PXD 35 DCI R410A Model Indoor Unit PXD 35 DCI Model Outdoor Unit ONG-DCI 35 Installation Method of Pipe Flared Characteristics Units Cooling Heating Capacity (1) Btu/hr 11940(5120~15010) 14330(5120~17060) kw 3.5( ) 4.2(1.5~5.0) Power input (1 ) kw 0.98( ) 1.31(0.35~1.58) EER (Cooling) or COP(Heating) (1) W/W Energy efficiency class A C Power supply V/Ph/Hz V/Single/50Hz Rated current A Starting current A 10.5 Circuit breaker rating A 35 Fan type & quantity Centrifugal x 2 Fan speeds H/M/L RPM 830/760/500 Air flow (2) H/M/L m3/hr 450/400/300 External static pressure Min-Max Pa 0 Sound power level (3) H/M/L db(a) 56/53/51 Sound pressure level (4) H/M/L db(a) 45/41/38 Moisture removal l/hr 1.5 Condenstate drain tube I.D mm 16 Dimensions WxDxH mm 820*190*630 Weight kg 22 Package dimensions WxDxH mm 890*280*710 Package weight kg 26 Units per pallet units 14units per pallet Units stacking units 7 levels Refrigerant control EEV Compressor type,model Single Rotary,DC Inverter,Panasonic 5RS102XAB Fan type & quantity Propeller(direct) x 1 Fan speeds H/L RPM 830 Air flow H/L m3/hr 1780 Sound power level H/L db(a) 62 Sound pressure level (4) H/L db(a) 52 Dimensions WxDxH mm 795*290*610 Weight kg 38.5 Package dimensions WxDxH mm 945*395*655 Packaged weight kg 42.5 Units per pallet Units 9 Stacking height units 3 levels Refrigerant type R410A Refrigerant chargless distance kg/m 1.20kg/7.5m Additional charge per 1 meter g/m No Need Liquid line In.(mm) 1/4"(6.35) Connections Suction line In.(mm) 3/8"(9.53) between units Max.tubing length m. Max.20 Max.height difference m. Max.10 Operation control type Remote control Heating elements (Option) kw Others INDOOR OUTDOOR (1) Rating conditions in accordance with ISO 5151 and ISO (for ducted units) and EN (2) Airflow in ducted units; at nominal external static pressure. (3) Sound power in ducted units is measured at air discharge. (4) Sound pressure level measured at 1 meter distance from unit. 2-2

9 PRODUCT DATA SHEET Model Indoor Unit PXD 50 DCI Model Outdoor Unit ONG-DCI 50 Installation Method of Pipe Flared Characteristics Units Cooling Heating Capacity (1) Btu/hr 17000( ) 20460( ) kw 5.0( ) 5.8(1.5~7.2) Power input (1) kw 1.65( ) 1.69( ) EER (Cooling) or COP(Heating) (1) W/W Energy efficiency class B B Power supply V/Ph/Hz V/Single/50Hz Rated current A Starting current A 10.5 Circuit breaker rating A 35 Fan type & quantity Centrifugal x 2 Fan speeds H/M/L RPM 1050/950/700 Air flow (2) H/M/L m3/hr 870/750/600 External static pressure Min-Max Pa 0 Sound power level (3) H/M/L db(a) 65/60/56 Sound pressure level (4) H/M/L db(a) 51/48/45 Moisture removal l/hr 2 Condenstate drain tube I.D mm 16 Dimensions WxDxH mm 1200*190*630 Weight kg 30 Package dimensions WxDxH mm 1270*280*710 Package weight kg 35 Units per pallet units 7units per pallet Units stacking units 7 levels Refrigerant control EEV Compressor type,model Single Rotary,DCI, Scroll Panasonic 5CS130XCC03 Fan type & quantity Propeller(direct) x 1 Fan speeds H/L RPM 920 Air flow H/L m3/hr 2160 Sound power level H/L db(a) 63 Sound pressure leve l(4) H/L db(a) 53 Dimensions WxDxH mm 795*290*610 Weight kg 39 Package dimensions WxDxH mm 945*395*655 Packaged weight kg 43 Units per pallet Units 9 Stacking height units 3 levels Refrigerant type R410A Refrigerant chargless distance kg/m 1.50kg/7.5m Additional charge per 1 meter g/m No Need Liquid line In.(mm) 1/4"(6.35) Connections between Suction line In.(mm) 1/2"(12.7) units Max.tubing length m. Max.30 Max.height difference m. Max.10 Operation control type Remote control Heating elements (Option) kw Others INDOOR OUTDOOR (1) Rating conditions in accordance with ISO 5151 and ISO (for ducted units) and EN (2) Airflow in ducted units; at nominal external static pressure. (3) Sound power in ducted units is measured at air discharge. (4) Sound pressure level measured at 1 meter distance from unit. 2-3

10 RATING CONDITIONS 3. RATING CONDITIONS Standard conditions in accordance with ISO 5151, ISO (for ducted units) and EN Cooling: Indoor: 27 o C DB 19 o C WB Outdoor: 35 o C DB Heating: Indoor: 20 o C DB Outdoor: 7 o C DB 6 o C WB 3.1 Operating Limits R410A Cooling Heating Voltage Indoor Outdoor Upper limit 32 o C DB 23 o C WB 46 o C DB Lower limit 21 o C DB 15 o C WB -10 o C DB Upper limit 27 o C DB 24 o C DB 18 o C WB Lower limit 10 o C DB -15 o C DB -16 o C WB 1PH V 3PH N/A 3-1

11 OUTLINE DIMENSIONS 4. OUTLINE DIMENSIONS 4.1 Indoor Unit: PXD 25, 35, DCI 4.2 Indoor Unit: PXD 50 DCI 4-1

12 OUTLINE DIMENSIONS 4.3 Outdoor Unit: ONG 25, 35, 50 DCI 4-2

13 PERFORMANCE DATA & PRESSURE CURVES 5. PERFORMANCE DATA 5,1 PXD25 DCI Cooling Capacity (kw) Run Mode 230[V] : Indoor Fan at High Speed. OU COIL ENTERING AIR DB TEMPERATURE [ o C] (protection range) ID COIL ENTERING AIR DB/WB TEMPERATURE [ o C] DATA 22/15 24/17 27/19 29/21 32/23 TC % of nominal SC % of nominal PI % of nominal TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI 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 OU Outdoor Capacity Correction Factors Capacity Ratio Cooling Capacity Ratio Vs. Outdoor Temperature Outdoor Temperature [ºC] 5-1

14 PERFORMANCE DATA & PRESSURE CURVES Heating Capacity (kw) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ o C] OU COIL ENTERING AIR DB/WB TEMPERATURE [ o C] DATA /-16-10/-12-7/-8-1/-2 2/1 7/6 TC PI TC PI TC PI TC PI TC PI TC PI /9 TC PI /12 TC PI TC % of nominal (Protection Range) PI % of nominal LEGEND TC Total Heating Capacity, kw PI Power Input, kw WB Wet Bulb Temp., ( o C) DB Dry Bulb Temp., ( o C) ID Indoor OU Outdoor Capacity Correction Factors Heating Capacity Ratio Vs. Outdoor Temperature Capacity Ration Outdoor WB Temperature [deg C] 5-2

15 PERFORMANCE DATA & PRESSURE CURVES 5.2 PXD35 DCI Cooling Capacity (kw) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ o C] OU COIL ENTERING AIR DB TEMPERATURE [ o C] (protection range) DATA 22/15 24/17 27/19 29/21 32/23 TC % of nominal SC % of nominal PI % of nominal TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI 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 OU Outdoor Capacity Correction Factor Capacity Ratio Cooling Capacity Ratio Vs. Outdoor Temperature Outdoor Temperature [ºC] 5-3

16 PERFORMANCE DATA & PRESSURE CURVES Heating Capacity (kw) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ o C] OU COIL ENTERING AIR DB/WB TEMPERATURE [ o C] DATA /-16-10/-12-7/-8-1/-2 2/1 7/6 TC PI TC PI TC PI TC PI TC PI TC PI /9 TC PI /12 TC PI TC % of nominal (Protection Range) PI % of nominal LEGEND TC Total Heating Capacity, kw PI Power Input, kw WB Wet Bulb Temp., ( o C) DB Dry Bulb Temp., ( o C) ID Indoor OU Outdoor Capacity Correction Factors Heating Capacity Ratio Vs. Outdoor Temperature Capacity Ration Outdoor WB Temperature [deg C] 5-4

17 PERFORMANCE DATA & PRESSURE CURVES 5.3 PXD50 DCI Cooling Capacity (kw) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ o C] OU COIL ENTERING AIR DB TEMPERATURE [ o C] (protection range) DATA 22/15 24/17 27/19 29/21 32/23 TC % of nominal SC % of nominal PI % of nominal TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI 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 OU Outdoor Capacity Correction Factors Cooling Capacity Ratio Vs. Outdoor Temperature Capacity Ratio Outdoor Temperature [ºC] 5-5

18 PERFORMANCE DATA & PRESSURE CURVES Heating Capacity (kw) - Run Mode 230[V] : Indoor Fan at High Speed. OU COIL ENTERING AIR DB/WB TEMPERATURE [ o C] -15/-16-10/-12-7/-8-1/-2 2/1 7/6 ID COIL ENTERING AIR DB TEMPERATURE [ o C] DATA TC PI TC PI TC PI TC PI TC PI TC PI /9 TC PI /12 TC PI TC % of nominal (Protection Range) PI % of nominal LEGEND TC Total Heating Capacity, kw PI Power Input, kw WB Wet Bulb Temp., ( o C) DB Dry Bulb Temp., ( o C) ID Indoor OU Outdoor Capacity Correction Factors Heating Capacity Ratio Vs. Outdoor Temperature Capacity Ration Outdoor WB Temperature [deg C] 5-6

19 PERFORMANCE DATA & PRESSURE CURVES 5.4 Capacity Correction Factor Due to Tubing Length PXD 25/35 DCI :Cooling Capacity Ratio Tubing Length [m] Heating 1.02 Capacity Ratio Tubing Length [m] 5-7

20 PERFORMANCE DATA & PRESSURE CURVES PXD 50 DCI :Cooling Capacity ratio Tubing length(m) Heating Capacity ratio Tubing Length(m) 5-8

21 PERFORMANCE DATA & PRESSURE CURVES 5.5 Pressure Curves Model: PXD 25 DCI Cooling Test Mode Suction Pressure Vs.Outdoor Temp. Suction Pressure [kpa] Outdoor DB Temperature[ºC ] Indoor DB/WB 22/15 24/17 27/19 29/21 32/23 Discharge Pressure [kpa] Discharge Pressure Vs. Outdoor Temp Outdoor DB Temperature[ºC ] Indoor DB/WB 22/15 24/17 27/19 29/21 32/23 5-9

22 PERFORMANCE DATA & PRESSURE CURVES Heating Test Mode Suction Pressure [kpa] Suction Pressure Vs.Outdoor Temp Outdoor WB Temperature [ºC] Discharge Pressure Vs. Outdoor Temp. Discharge Pressure [kpa] Outdoor WB Temperature [ºC] Indoor DB

23 PERFORMANCE DATA & PRESSURE CURVES Model: PXD 35 DCI Cooling Test Mode Suction Pressure [kpa] Suction Pressure VS.Outdoor Temp. Indoor DB/WB 22/15 24/17 27/19 29/21 32/ Outdoor DB Temperature[ºC ] Discharge Pressure [kpa] Discharge Pressure VS. Outdoor Temp Outdoor DB Temperature[ºC ] Indoor DB/WB 22/15 24/17 27/19 29/21 32/

24 PERFORMANCE DATA & PRESSURE CURVES Heating Test Mode Suction Pressure [kpa] Suction Pressure VS.Outdoor Temp Outdoor WB Temperature [ºC] Discharge Pressure [kpa] Discharge Pressure VS. Outdoor Temp Outdoor WB Temperature [ºC] Indoor DB

25 PERFORMANCE DATA & PRESSURE CURVES Model: PXD 50 DCI Cooling Test Mode Suction Pressure [kpa] Suction Pressure VS.Outdoor Temp Outdoor DB Temperature[ºC ] Indoor DB/WB 22/15 24/17 27/19 29/21 32/23 Discharge Pressure [kpa] Discharge Pressure VS. Outdoor Temp Outdoor DB Temperature[ºC ] Indoor DB/WB 22/15 24/17 27/19 29/21 32/

26 PERFORMANCE DATA & PRESSURE CURVES Heating Test Mode 1100 Suction Pressure VS.Outdoor Temp. Suction Pressure [kpa] Outdoor WB Temperature [ºC] Discharge Pressure VS. Outdoor Temp. Discharge Pressure [kpa] Indoor DB Outdoor WB Temperature [ºC] 5-14

27 ELECTRICAL DATA 6. ELECTRICAL DATA 6.1 Single Phase Units MODEL PXD 25 DCI PXD 35 DCI PXD 50 DCI Power Supply To indoor To indoor To indoor 1PH-230V-50Hz 1PH-230V-50Hz 1PH-230V-50Hz Max Current, A Inrush Current A Starting Current A Circuit Breaker A Power Supply Wiring No. X Cross Section mm 2 3x1.5 mm 2 3x1.5 mm 2 3x2.5 mm 2 Interconnecting Cable No. X Cross Section mm 2 4x1.5 mm 2 4x1.5 mm 2 4x2.5 mm 2 NOTE Power wiring cord should comply with local lows and electrical regulations requirements. 6-1

28 WIRING DIAGRAMS 7. WIRING DIAGRAMS 7.1 PXD 25, 35, 50 DCI OUTDOOR UNIT CIRCUIT DIAGRAM OFAN OAT OCT CTT SUCT COMP Choke coil Reverse valve Base heater Red Bla c k Ora n g e Red Brown Bla c k White Blue V dc E A RTH V cc V sp FG 5 6 U V P3 P9 W P11 P13 P Y ellow Blue P4 P1 P16 P17 P18 P21 P22 P2 P19 P20 P8 Outdoor unit controller PCB P10 L N COM N-COM P12 EARTH JP P megatool P Y/G Y/G Black Red Blue EMI f ilter PCB EEV EARTH NCOM COM N-F L-F EARTH COM L N magnetic ring Y/G Red FUSE Brown C/5 L/4 N/3 Y/G Red Brown Blue Display POWER SUPPLY Y/G Red Brown Blue 7-1

29 REFRIGERATION DIAGRAMS 8. REFRIGERATION DIAGRAMS 8.1 PXD 25, 35, 50 DCI / ONG3 25, 35, 50 DCI EEV EEV 8-1

30 TUBING CONNECTIONS 9. TUBING CONNECTIONS TUBE (Inch) ¼ ⅜ ½ ⅝ ¾ TORQUE (Nm) Flare Nuts Valve Cap Service Port Cap 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. 9-1

31 CONTROL SYSTEM 10. CONTROL SYSTEM 10.1 General Functions and Rules (for single split models) 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 System Operation Concept The control function is divided between indoor and outdoor unit controllers. Indoor unit is the system Master, requesting the outdoor unit for cooling/heating capacity supply. The outdoor unit is the system Slave and it must supply the required capacity unless it enters into a protection mode avoiding it from supplying the requested capacity. The capacity request is transferred via indoor to outdoor communication, and is represented by a parameter called NLOAD. NLOAD is an integer number with values between 0 and 127, and it represents the heat or cool load felt by the indoor unit Compressor Frequency Control NLOAD setting The NLOAD setting is done by the indoor unit controller, based on a PI control scheme. The actual NLOAD to be sent to the outdoor unit controller is based on the preliminary LOAD calculation, the indoor fan speed, and the power shedding function. NLOAD limits as a function of indoor fan speed: Indoor Fan Speed Maximum NLOAD Cooling Maximum NLOAD Heating Low Max NLOADIF1C 127 Medium Max NLOADIF2C 127 High Max NLOADIF3C 127 Turbo Max NLOADIF4C 127 Auto Max NLOADIF5C 127 NLOAD limits as a function of power shedding: Mode Power Shedding OFF Power Shedding ON Cool No limit Nominal Cooling Heat No limit Nominal Heating 10-1

32 CONTROL SYSTEM Target Frequency Setting The compressor target frequency is a function of the NLOAD number sent from the indoor controller and the outdoor air temperature. Basic Target Frequency Setting: NLOAD Target Frequency 127 Maximum frequency 10 < NLOAD < 127 Interpolated value between minimum and maximum frequency 10 Minimum frequency 0 Compressor is stopped Target frequency limits as a function of outdoor air temperature (OAT): OAT Range Cool mode limits Heat mode limits OAT < 6 MaxFreqAsOATC No limit 6 OAT < 15 MaxFreqAsOAT1H 15 OAT < 24 MaxFreqAsOAT2H 24 OAT No limit Frequency Changes Control Frequency change rate is 1 Hz/sec Compressor Starting Control Frequency Step 3 Step 2 Step 1 1 Minute 1 Minute Time Min 10 Minutes Minimum On and Off Time 3 minutes 10-2

33 CONTROL SYSTEM 10.4 Indoor Fan Control 10 Indoor fan speeds are determined for each model. 5 speeds for cool/dry/fan modes and 5 speeds for heat mode. When user sets the indoor fan speed to a fixed speed (Low/ Medium/ High), unit will operate constantly at set speed. When Auto Fan is selected, indoor unit controller can operate in all speeds. The actual speed is set according to the cool/heat load Turbo Speed The Turbo speed is activated during the first 30 minutes of unit operation when auto fan speed is selected and under the following conditions: Difference between set point and actual room temperature is bigger then 3 degrees. Room temperature > 22 for cooling, or < 25 for heating Heating Element Control Heating element can be started if LOAD > 0.8 * MaximumNLOAD AND Indoor Coil temperature < 45. The heating element will be stopped when LOAD < 0.5 * MaximumNLOAD OR if Indoor Coil temperature > Outdoor Fan Control 7 outdoor fan speeds are determined for each model. 3 speeds for cool and dry modes, and 3 speeds for heat mode, and a very low speed. Outdoor fan speed is a function of compressor frequency and outdoor air temperature (OAT). 4 routines for fan control are determined. The control routine selection depends on operation mode, compressor speed, and outdoor air temperature (OAT) and heat sink temperature (HST). Routine A B C D Conditions Heating with OAT < 15 0 C or Cooling with OAT > 20 0 C, or HST > 50 0 C or Faulty OAT Cooling with 20 0 C > OAT > 7 0 C Cooling with 7 0 C > OAT Heating with OAT > 15 0 C 10-3

34 CONTROL SYSTEM Compressor Frequency (CF) Outdoor Fan Speed Routine A Routine B Routine C Routine D CF = 0 OFF OFF OFF OFF 10 CF < OFLowFreq Low Low Very Low Low OFLowFreq CF < OFMedFreq Medium Low Very Low Low OFMedFreq CF High Low Low Medium In cooling mode, the extra rule is as the below: HST Change To Higher OFAN Cool state (*1) (*1) If State C, change to B If State B, change to A Change To lower OFAN Cool state 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 EEV (electronic Expansion valve) Control EEV opening is defined as EEV = EEV OL + EEV CV EEV OL is the initial EEV opening as a function of the compressor frequency, operation mode, unit model and capacity. EEV CV is a correction value for the EEV opening that is based on the compressor temperature. During the first 10 minutes of compressor operation EEV CV = 0. Once the first 10 minutes are over, the correction value is calculated as follow: EEV CV (n) = EEV CV (n-1) + EEV CTT EEV CTT is the correction based on the compressor temperature. A target compressor temperature is set depending on frequency and outdoor air temperature, and the actual compressor temperature is compared to the target temperature to set the required correction to the EEV opening Reversing Valve (RV) Control Reversing valve is on in heat mode. Switching of RV state is done only after compressor is off for over 3 minutes. 10-4

35 CONTROL SYSTEM 10.9 Ionizer Control Ionizer is on when unit is on AND indoor fan is on AND Ionizer power switch (on Ionizer) is on 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 Base Heater Control When OAT is connected, Base Heater will be on when unit is in heating and OAT<2 0 C. When OAT is disconnected, Base Heater will be on when unit is in heating Fan Mode In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed. In Auto Fan user setting, fan speed will be adjusted automatically according to the difference between actual room temperature and user set point temperature 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 Auto Fan user setting, fan speed will be adjusted automatically according to the calculated NLOAD Heat Mode NLOAD is calculated according to the difference between actual room temperature and user set point temperature by PI control. In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed. In AutoFan user setting, fan speed will be adjusted automatically according to the calculated NLOAD Temperature Compensation In wall mounted, ducted, and cassette models, 3 degrees are reduced from room temperature reading (except when in I-Feel mode), to compensate for temperature difference between high and low areas in the heated room, and for coil heat radiation on room thermistor. The temperature compensation can be enabled/disabled by shortening of J2 on the indoor unit controller. 10-5

36 CONTROL SYSTEM Model J2 Shorted J2 Opened Wall mounted Compensation Disabled Compensation Enabled Cassette Compensation Enabled Compensation Disabled Ducted Compensation Enabled Compensation Disabled Floor/Ceiling Compensation Disabled Compensation Enabled Indoor Fan Control in Heat Mode Indoor fan speed depends on the indoor coil temperature: ICTST ICTVL ICTL ICTH ICTT 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 ( T). Unit will switch from cool to heat when compressor is off for 3 minutes, and T < -3. Unit will switch from heat to cool when compressor is off for 5 minutes, and T < 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 Protections There are 5 protection codes. Normal (Norm) unit operate normally. Stop Rise (SR) compressor frequency can not be raised but does not have to be decreased. HzDown1 (D1) Compressor frequency is reduced by 2 to 5 Hz per minute. HzDown2 (D2) Compressor frequency is reduced by 5 to 10 Hz per minute. Stop Compressor (SC) Compressor is stopped. 10-6

37 CONTROL SYSTEM Indoor Coil Defrost Protection ICT Trend ICT Fast Increasing Increasing No change Decreasing Fast Decreasing ICT < -2 SC SC SC SC SC -2 ICT < 0 D1 D1 D2 D2 D2 0 ICT < 2 SR SR D1 D2 D2 2 ICT < 4 SR SR SR D1 D2 4 ICT < 6 Norm Norm SR SR D1 6 ICT < 8 Norm Norm Norm SR SR 8 ICT Normal Indoor Coil over Heating Protection ICT Trend ICT Fast Decreasing Decreasing No Change Increasing Fast Increasing ICT > 55 SC SC SC SC SC 53 < ICT 55 D1 D1 D2 D2 D2 49 < ICT 53 SR SR D1 D2 D2 47 < ICT 49 SR SR SR D1 D2 45 < ICT 47 Norm Norm SR SR D1 43 < ICT 45 Norm Norm Norm SR SR ICT 43 Normal Compressor over Heating Protection Compressor temperature can be in one of 5 control zones (4 in protection, and 1 normal), according to the following chart. CTT CTTOH4 CTTOH3 CTTOH2 CTTOH1 Stop-Compresor P3 P2 P1 Normal 10-7

38 CONTROL SYSTEM Control Status Compressor Temperature Increases Else P1 Norm SR P2 D1 SR P3 D2 D1 Stop Compressor SC Compressor over Current Protection CCR CCROC4 Stop-Compresor CCROC3 CCROC2 CCROC1 HzDown1 Normal HzDown2 Stop-Rise Heat Sink over Heating Protection (NA for DCI 25 and 35 HST HST Trend Decreasing No Change Increasing HST > 90 SC SC SC 85 < HST 90 D1 D2 D2 82 < HST 85 SR D1 D2 80 < HST 82 SR SR D1 78 < HST 80 Norm Norm SR HST 78 Normal 10-8

39 CONTROL SYSTEM Outdoor Coil Deicing Protection Deicing Starting Conditions: Deicing operation will start when either one of the following conditions exist: Case 1: OCT < OAT 8 AND TLD > DI Case 2: OCT < OAT 12 AND TLD > 30 minutes. Case 3: OCT is Invalid AND TLD > DI Case 4: Unit is just switched to STBY AND OCT < OAT 8 Case 5: NLOAD = 0 AND OCT < OAT -8 OCT Outdoor Coil Temperature OAT Outdoor Air Temperature TLD Time from Last Deicing DI Deicing Interval (Time Interval between Two Deicing) Deicing interval time when compressor is first started in heat mode, is 10 minutes if OCT < -2, and is 40 minutes in other cases. Deicing interval time is changed (increased/ decreased in 10 minutes steps) as a function of deicing time. If deicing time is shorter then former deicing time, the deicing interval time will be increased. If deicing time is longer then former deicing time, the deicing interval time will be decreased Deicing Protection Procedure 12 0 Threshold OCT COMP ON T1 T2 T1 max. 12 minutes RV HEAT COOL T3 DT T3 OFAN ON OFF EEV Any EEVDeicerOpen T1 = T2 = 36 seconds, T3 = 6 seconds 10-9

40 CONTROL SYSTEM Condensate Water Over Flow Protection Each of the pins P1, P2, P3 can have two options: 1 When it is shorted with P4 0 When it is not shorted to P Levels Logic (used in floor/ceiling models) P2 P3 Level 0 0 L0 1 0 L1 1 1 L2&3 0 1 L4 Water Level LEVEL4 LEVEL2&3 LEVEL1 Pump ON OFF NLOAD ANY 0 OPER LED BLINK NORMAL 10-10

41 CONTROL SYSTEM Level Logic (used in all models except for floor/ceiling models) P2 P3 Level Don t care 1 Normal Don t care 0 Overflow Water Level Overflow Normal Overflow when unit is ON Overflow when unit is OFF OPER LED ON OFF BLINK NLOAD ANY 0 NLOAD is forced to 0 PUMP ON OFF 8 min 8 min 8 min Indoor Unit Dry Contact Indoor unit Dry contact has two alternative functions that are selected by J8. Function Contact = Open Contact = Short J8 = Open Presence Detector Connection No Limit Forced to STBY J8 = Short Power Shedding Function No Limit Limit NLOAD Operating the Unit from the Mode Button Forced operation allows starting, stopping and operating in Cooling or Heating, in pre-set temperature according to the following table: Forced operation Mode Cooling Heating Pre-set Temperature 20 0 C 28 0 C 10-11

42 CONTROL SYSTEM On Unit Controls and Indicators Indoor Unit Controller Controls and Indicators for All Models STAND BY INDICATOR 1. Lights up when the Air Conditioner is connected to power and ready to receive the R/C commands OPERATION INDICATOR TIMER INDICATOR FILTER INDICATOR COOLING INDICATOR HEATING INDICATOR Mode SWITCH (COOL/HEAT/OFF) RESET / FILTER SWITCH 1. Lights up during operation. 2. Blinks for 300 msec., to announce that a R/C infrared signal has been received and stored. 3. Blinks continuously during protections (according to the relevant spec section). Lights up during Timer and Sleep operation. Lights up when Air Filter needs to be cleaned. Lights up when system is switched to Cool Mode by using the Mode Switch on the unit. Lights up when system is switched Heat Mode by using the Mode Switch on the unit. Every short pressing, the next operation mode is selected, in this order : SB Cool Mode Heat Mode SB In long pressing system enters diagnostic mode. For short pressing: When Filter LED is on - turn off the FILTER INDICATOR after a clean filter has been reinstalled. When Filter LED is off enable/disable the buzzer announcer, if selected

43 CONTROL SYSTEM Indoor Unit Controls and Indicators for LCD Display (Low) (Med) (High) (Turbo) STBY Cool Heat Auto Fan Dry OFF 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*) OFF OFF OFF OFF OFF User setting IFAN speed User setting IFAN speed User setting IFAN speed User setting IFAN speed User setting IFAN speed (Auto) Backlight(red) OFF OFF ON(3*) ON(3*) ON(3*) OFF Backlight(green) OFF ON(3*) OFF ON(3*) ON(3*) ON(3*) Outdoor Unit Controller Indicators Unit has three LED s. SB LED is ON when power is ON (230 VAC, even when no communication). STATUS LED is ON when COMP is ON, and Blinks according to diagnostics mode definitions when either fault or protection occurs. FAULT LED Blinks according to diagnostics mode definitions when either fault or protection occurs

44 CONTROL SYSTEM Jumper Settings Indoor Unit Controller Self test Jumper J1: 0 = Open Jumper (disconnect jumper) / 1 = Close Jumper (connect jumper). OPERATION J1 SELF-TEST 1 NORMAL 0 Compensation Jumper J2 Model J2 (Default) Compensation WNG/WNG18/WNG30 0 Activated PXD/AC 1 Deactivated LS/K/KS 1 Activated Family selection Jumper J3, J4, J5and J6 Family J6 J5 J4 J3 WNG PXD KS LS K WNG WNG IDU Model Jumper Setting J8 J7 J6 J5 J4 J3 WNG WNG WNG WNG WNG PXD PXD PXD K K K LS For wall mounted units Jumpers j7, j8 can be configured by service. All other jumpers on the above table are factory default (cannot be changed by service). For unit types as Cassettes, floor ceiling, and ducted, jumpers are set by a model plug

45 CONTROL SYSTEM Model selection Jumper J7, J8 Model J8 J7 A B C D J9- Presence Detector/Power Shedding OPERATION J9 Presence Detector 0 Power Shedding 1 Jumper J10 OPERATION J10 WNG DCI LCD 0 LED 1 Note: Jumper 10 states will be ignored for families other than WNG /WNG18/WNG30 (for other families it will always be LED operation) Outdoor Unit Controller JP9 JUMPER LAYOUT Reserved (PIN 9) ODU3 (PIN 7) ODU2 (PIN 5) ODU1 (PIN 3) ODU0 (PIN 1) GND (PIN 10) GND (PIN 8) GND (PIN 6) GND (PIN 4) GND (PIN 2) ODU MODEL SELECTION ODU3 ODU2 ODU1 ODU0 ODU Model OFF OFF OFF OFF Reserved OFF OFF OFF ON (PIN1 & PIN2) A (DCI 25) OFF OFF ON (PIN3 & PIN4) OFF B (DCI 35) OFF OFF ON (PIN3 & PIN4) ON (PIN1 & PIN2) C (DCI 50) OFF ON (PIN5 & PIN6) OFF OFF D OFF ON (PIN5 & PIN6) OFF ON (PIN1 & PIN2) E (Duo) OFF ON (PIN5 & PIN6) ON (PIN3 & PIN4) OFF F OFF ON (PIN5 & PIN6) ON (PIN3 & PIN4) ON (PIN1 & PIN2) G ON (PIN7 & PIN8) OFF OFF OFF H ON (PIN7 & PIN8) OFF OFF ON (PIN1 & PIN2) I ON (PIN7 & PIN8) OFF ON (PIN3 & PIN4) OFF J ON (PIN7 & PIN8) OFF ON (PIN3 & PIN4) ON (PIN1 & PIN2) K ON (PIN7 & PIN8) ON (PIN5 & PIN6) OFF OFF L ON (PIN7 & PIN8) ON (PIN5 & PIN6) OFF ON (PIN1 & PIN2) M ON (PIN7 & PIN8) ON (PIN5 & PIN6) ON (PIN3 & PIN4) OFF N ON (PIN7 & PIN8) ON (PIN5 & PIN6) ON (PIN3 & PIN4) ON (PIN1 & PIN2) O 10-15

46 CONTROL SYSTEM Test Mode Entering Test Mode System can enter Test mode in two ways: Automatically when the following conditions exists for 30 minutes continuously: o Mode = Cool, Set point = 16, Room temperature = 27±1, Outdoor temperature = 35±1 Or o Mode = Heat, Set point = 30, Room temperature = 20±1, Outdoor temperature = 7±1 Manually when entering diagnostics with the following settings: o Mode = Cool, Set point = 16 o Mode = Heat, Set point = Unit Operation in Test Mode In test mode, the unit will operate in fixed settings according to the indoor fan speed setting: Indoor Fan Speed Setting Low High Auto Unit Setting Minimum Capacity Setting Nominal Capacity Setting Maximum Capacity Setting During test mode, protections are disabled, except for stop compressor status Additional Functions and Rules (for DUAL split models) The DCI SW 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 System Control Concept All indoor unit related items control remains the same as in single split applications. All outdoor units related control logic remains the same as in single split applications. The MSMP controller is responsible only for the following control: Setting of system operation mode (cool/heat) Setting the NLOAD for the outdoor units Controlling of the EEV s Dry contacts control 10-16

47 CONTROL SYSTEM Compressor Frequency Control Outdoor Unit NLOAD setting The MSMP controller gets the NLOAD from each of the indoor units, and sends a combined NLOAD to the outdoor unit control. The combined NLOAD is a weighted average of the indoor units NLOAD. The weight of the indoor units as a function of their nominal capacity: Indoor Unit Capacity [kw] (kbtu/hr) Capacity Code 2.5 (9000) (12000) (18000) (24000) EEV (electronic Expansion valve) Control EEV opening is defined as EEV = EEV OL + EEV CV EEV OL is the initial EEV opening as a function of the compressor frequency, operation mode, unit model and capacity. EEV CV is a correction value for the EEV opening that is based in cooling mode on the relevant indoor unit super heat and compressor temperature. During the first 10 minutes of compressor operation EEV CV = System Mode Setting and Reversing Valve (RV) Control The first indoor unit that is causing the system to be turned ON sets the system mode Indoor Units Operation when Indoor Unit Mode is Different than Outdoor Unit Mode Open louvers according to user selection. Indoor fan is forced to OFF Dry Contacts Control Dry Contact Contact = Open Contact = Short STBY No Limit System is Forced to STBY Night No Limit Outdoor fan speed reduced to low in cooling mode A dry contact output for Alarm will be shorted when any failure exists in the system

48 CONTROL SYSTEM SW Parameters Indoor Units SW Parameters General Parameters for All Models: Parameters defining the indoor fan speed as a function of Indoor Coil temperature in heat mode (ICT): ICTST Speed ICT to stop indoor fan 25 ICTVLSpeed ICT to go down to very low speed 28 ICTLSpeed ICT to start in very low speed 30 ICTHSpeed ICT to start in increase speed from very low 32 ICTTSpeed ICT to enable Turbo fan speed 40 Model Depended Parameters: Parameter name Wall Mounted Models DCI 25 DCI 35 DCI 50 DCI 60 NLOAD limits as a function of selected indoor fan speed MaxNLOADIF1C MaxNLOADIF2C MaxNLOADIF3C MaxNLOADIF4C MaxNLOADIF5C Indoor Fan speeds IFVLOWC IFLOWC IFMEDC IFHIGHC IFTURBOC IFVLOWH IFLOWH IFMEDH IFHIGHH IFTURBOH Nominal Compressor Frequency NomLoadC NomLoadH Parameter Name Cassette / Floor mounted K 35S 50 NLOAD limits as a function of selected indoor fan speed MaxNLOADIF1C MaxNLOADIF2C MaxNLOADIF3C MaxNLOADIF4C MaxNLOADIF5C Nominal Compressor Frequency NomLoadC

49 CONTROL SYSTEM NomLoadH Outdoor Units SW Parameters: Parameter Name DCI25 DCI35 DCI 50 DCI50 DUO DCI 60 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 CTTOH CTTOH CTTOH CTTOH Compressor Over Current Protection [A] CCR CCR CCR CCR Outdoor Fan Speed (RPM) VL OFLOWC OFMEDC OFMAXC OFLOWH OFMEDH OFMAXH Outdoor Fan Limit Control OFLowFreqC OFMedFreqC OFLowFreqH OFMedFreqH

50 TROUBLESHOOTING 11. TROUBLESHOOTING Warning!!! When Power Up the whole outdoor unit controller, including the wiring, is under HIGH VOLTAGE!!! Never open the Outdoor unit before turning off the Power!!! When turned off, the system is still charged (400V)!!! It takes about 4 Min. to discharge the system. Touching the controller before discharging may cause an electrical shock!!! For safe handling of the controller please refer to section 12.6 below..1 Single Split system failures and corrective actions No SYMPTOM PROBABLE CAUSE 1 Power supply indicator No power supply (Red LED) does not light up. 2 Unit does not respond to Remote control remote control message message not reached the indoor unit 3 Unit responds to remote control message but Operate indicator (Green LED) does not light up 4 Indoor fan does not start (louvers are opened and Green LED does light up) 5 Indoor fan works when unit is OFF, and indoor fan speed is not changed by remote control command. 6 Compressor does not start 7 Compressor stops during operation and Green LED remains on Problem with display PCB Unit in heat mode and coil is still not warm. Problem with PCB or capacitor PCB problem Electronics control problem or protection Electronic control or power supply problem CORRECTIVE ACTION Check power supply. If power supply is OK, check display and display wiring. if OK, replace controller. Check remote control batteries, if batteries are OK, check display and display wiring, if OK, replace display PCB. If still not OK replace controller. Replace display PCB. If still not OK replace controller. Change to cool mode and check. Change to high speed and Check power supply to motor is higher than 130VAC (for triack controlled motor) or higher than 220VAC for fixed speed motors, if OK replace capacitor, if not OK replace controller Replace controller Perform diagnostics (See 12.3 below), and follow the actions described. Perform diagnostics (See 12.3 below), and follow the actions described. 11-1

51 TROUBLESHOOTING No SYMPTOM PROBABLE CAUSE 8 Compressor is on but Problem with outdoor fan does not outdoor electronics work or outdoor fan 9 Unit works in wrong mode (cool instead of heat or heat instead of cool) 10 All components are operating properly but no cooling or no heating 11 Compressor is over heated and unit does not generate capacity 12 Units goes into protections and compressor is stopped with no clear reason 13 Compressor motor is generating noise and no suction occurs 14 Water leakage from indoor unit 15 Freezing of outdoor unit in heat mode and outdoor unit base is blocked with ice 16 Unit operates with wrong fan speeds or wrong frequency Electronics or power connection to RV Refrigerant leak EEV problem Control problem or refrigeration system problem Phase order to compressor is wrong Indoor unit drainage tube is blocked Wrong jumper settings CORRECTIVE ACTION Check outdoor fan motor according to the procedure in section below, if not OK replace controller Check RV power connections, if OK, Check RV operation with direct 230VAC power supply, if OK, Replace outdoor controller. Check refrigeration system. Check EEV Perform diagnostics (See 12.3 below), and follow the actions described. Check compressor phase order. Check and open drainage tube. Connect base heater. Perform diagnostics (See 12.3 below), and check if units is operating by EEPROM parameters..2 Checking the refrigeration system Checking system pressures and other thermodynamic measures should be done when system is in Test Mode (in Test mode, system operates in fixed settings). The performance curves given in this manual are given for unit performance in test mode when high indoor fan speed is selected. Entering test mode: Set unit to Cool/16 degrees/high indoor fan speed, or Heat/30 degrees/high indoor fan speed, and enter diagnostics. 11-2

52 TROUBLESHOOTING.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. During the Outdoor unit diagnostics all four Indoor LED s (STBY, Operate, Filter and Timer) are blinking. When Indoor diagnostics is displayed, all four LED s (STBY, Operate, Filter and Timer) are ON. When system enters diagnostics mode, only one fault code is shown. Order of priority is from the lower to the higher number. Diagnostics is continuously ON as long as power is ON. The current system operation mode will not be changed. If no fault occurred in the system, no fault code will be displayed during normal operation mode. The last fault code will be displayed even if the system has recovered from that fault. The last fault will be deleted from the EEPROM after the system has exit diagnostics mode. In diagnostics mode, system fault / status will be indicated by blinking of Heat & Cool LEDs. The coding method will be as follows: 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 Indoor / Outdoor unit tables: Note: 0 OFF, 1-ON.3.1 Indoor unit Diagnostics No Problem RT-1 is disconnected RT-1 is shorted RT-2 is disconnected RT-2 is shorted Reserved Communication mismatch No Communication No Encoder Reserved Outdoor Unit Fault Reserved 17 Defrost protection Deicing Protection Outdoor Unit Protection Indoor Coil HP Protection Overflow Protection Reserved 24 EEPROM Not Updated Bad EEPROM Bad Communication Using EEPROM data Model A Model B Model C Model D

53 TROUBLESHOOTING.3.2 Indoor unit diagnosis and corrective actions No. Fault Probable Cause Corrective Action 1 Sensor failures of all types Check sensor connections or replace sensor 2 Communication mismatch Indoor and Outdoor controllers are with different versions Replace Indoor controller 3 No Communication Communication or groundingcheck Indoor to Outdoor wiring is not good. wiring and grounding 4 No Encoder Indoor electronics or motor Check motor wiring, if ok, replace motor, if still not ok, replace Indoor controller. 5 Outdoor Unit Fault Outdoor controller problem Switch to Outdoor diagnostics. 6 EEPROM Not Updated System is using ROM parameters and not EEPROM parameters No action, unless special parameters are required for unit operation. 7 Bad EEPROM No action, unless special parameters are required for unit operation. 8 Bad Communication 9 Using EEPROM data Communication quality is lowcheck Indoor to Outdoor reliability wiring and grounding No problem. System is using EEPRRRROM parameters 11-4

54 TROUBLESHOOTING Outdoor Unit Diagnastics No 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 DC under voltage DC over voltage AC under voltage IDU/ODU Communication mismatch No Communication Reserved Heat sink Over Heating Deicing Compressor Over Heating Compressor Over Current No OFAN Feedback OFAN locked Compressor Lock Bad Communication ON, 0 - OFF Only one code is shown. Order of priorety is Diagnostics is continuously ON as long power is on. 11-5

55 TROUBLESHOOTING Outdoor unit diagnosis and corrective actions Fault Probable Cause Corrective Action Sensors failures of all types Check sensors connections or replace sensors. IPM Fault Bad EEPROM DC under/over Voltage AC under Voltage Indoor / Outdoor unit Communication mismatch No Communication Compressor Lock Bad Communication Electronics HW problem Electronics HW problem Indoor and Outdoor controllers are with different versions Communication or grounding wiring is not good. Communication quality is low reliability Check all wiring and jumper settings, if OK, replace electronics. No action, unless special parameters are required for unit operation. Check outdoor unit power supply voltage Check outdoor unit power supply voltage Replace Indoor controller Check Indoor to Outdoor wiring and grounding Switch unit to STBY and restart Check Indoor to Outdoor wiring and grounding 11-6

56 TROUBLESHOOTING.4 Judgment by MegaTool MegaTool is a special tool to monitor the system states. Using MegaTool requires: A computer with RS232C port. A connection wire for MegaTool. A special MegaTool software. Use MegaTool according to following procedure: Setup MegaTool software: copy the software to the computer. Connect RS232C port in computer with MegaTool port in Indoor/Outdoor unit controller by the connection wire. Run the software and choose the COM port, you can monitor the A/C system state in monitor tab Simple procedures for checking the Main Parts Checking Mains Voltage. Confirm that the Mains voltage is between 198 and 264 VAC. If Mains voltage is out of this range, abnormal operation of the system is expected. If in range check the Power (Circuit) Breaker and look for broken or loosed cable lugs or wiring mistake(s). Checking Power Input. If Indoor unit power LED is unlighted, power down the system and check the fuse of the Indoor unit. If the fuse is OK replace the Indoor unit controller. If the fuse has blown, replace the fuse and power up again. Checking Power Input procedure for the Outdoor unit is the same as with the Indoor unit. Checking the Outdoor Fan Motor. Enter Test Mode (where the OFAN speed is high) Check the voltage between lead wires according to the normal value as following: Between red wire and black wire: 310VDC +/- 20V Between orange wire and black wire: 15VDC +/- 1V Between yellow wire and black wire: 2-6VDC Checking the Compressor. The compressor is brushless permanence magnetic DC motor. Three coil resistance is same. Check the resistance between three poles. The normal value should be below 0.5 ohm (TBD). Checking the Reverse Valve (RV). Running in heating mode, check the voltage between two pins of reverse valve connector, normal voltage is 220VAC..5.6 Checking the electrical expansion valve (EEV). The EEV has two parts, drive part and valve. The drive part is a step motor; it is ringed on the valve. Check the drive voltage (12VDC). When Outdoor unit is power on, EEV shall run and have click and vibration. 11-7

57 TROUBLESHOOTING Precaution, Advise and Notice Items High voltage in Outdoor unit controller. Whole controller, including the wires that are connected to the Outdoor unit controller may have the potential hazard voltage when power is on. Touching the Outdoor unit controller may cause an electrical shock. Advise: Don t touch the naked lead wire and don t insert finger, conductor or anything else into the controller when power is on..6.2 Charged Capacitors Three large-capacity electrolytic capacitors are used in the Outdoor unit controller. Therefore, charging voltage (380VDC) remains after power down. Discharging takes about four minutes after power is off. Touching the Outdoor unit controller before discharging may cause an electrical shock..6.3 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. Use gloves when disassemble the A/C units. 11-8

58 EXPLODED VIEWS AND SPARE PARTS LISTS 12. EXPLODED VIEWS AND SPARE PARTS LISTS 12.1 Indoor Unit: PXD 25, 35 DCI 12-1

59 EXPLODED VIEWS AND SPARE PARTS LISTS 12.2 Indoor Unit: PXD 25, 35 DCI No Part No Description Qty Back panel Base panel EPS Evap. Assy PXD25/ Fan frame Capacitor PXD25/ Motor support Centrifugal fan Transformer for PXD25/ Motor PXD25/ Spring clip Fan cover Left panel Filter Front panel Air inlet assy Motor connect wire for PXD25/ Right panel Vertical louver Air outlet AIRWELL Display panel WESPER Display panel ELECTRA Display panel JOHNSON Display panel GORENJEN Display panel FAGOR Display panel Horizontal louver front Horizontal louver back Swing motor Stop Step motor Connect wire Display Power cord without plug Power cord (European plug) Room sensor Coil sensor DCI STORM Storm panel

60 EXPLODED VIEWS AND SPARE PARTS LISTS 12.3 Indoor Unit: PXD 50 DCI 12-3

61 EXPLODED VIEWS AND SPARE PARTS LISTS 12.4 Indoor Unit: PXD 50 DCI No Part No Description Qty Back panel Base panel EPS Evap. Assy PXD Fan frame Capacitor PXD Transformer Motor support Centrifugal fan Motor Assy PXD18, Spring clip Motor connect wire Fan cover Left panel Filter Front panel Air inlet assy Right panel Vertical louver Air outlet ELECTRA Display panel Horizontal louver front Horizontal louver back Swing motor Step motor Connect wire Display Power cord 3x Coil sensor Room sensor DCI storm Storm panel

62 EXPLODED VIEWS AND SPARE PARTS LISTS 12.5 Outdoor Unit: ONG3 25, 35 DCI

63 EXPLODED VIEWS AND SPARE PARTS LISTS 12.6 Outdoor Unit: ONG3 25, 35 DCI No. Part No. Description Unit Front panel A Air inlet ring Painting insulation plate Axial fan OD= DC motor for DCI25/ Motor support Base painting Assy Partition Outdoor DC inverter controller (English) Gas valve (R410A) Liquid valve(r410a) EMI fliter board Chock Assy AC-IN connected wire Earthing wire for DCI Fuse connecting wire Therminal sheet Fuse stand JEF-511B(EHK P/N: ) Fuse 65TS(15A,230) Cable clip nylon poles terminal block Value cover Way valve coil way valve welding Assy. (DCI25) way valve welding Assy. (DCI35) way valve (DCI25) way valve (DCI35) Compressor wire DC Inverter compressor Assy. 5RS102XAB Compressor top thermistor(ctt) Outside air thermistor(oat) Outside coil thermistor(oct) Suction coil thermistor(suct) EEV Coil (CAN-MD 12FKS-1 White) Electronic expansion value (CAMB20YGFKS-1) Right side panel Back side net Condenser soldering assy Bridge Painting top cover Gasket for axial fan Nut M5 L Handle Left side panel painting plate

64 EXPLODED VIEWS AND SPARE PARTS LISTS 12.7 Outdoor Unit: ONG3 50 DCI 12-7

65 EXPLODED VIEWS AND SPARE PARTS LISTS 12.8 Outdoor Unit: ONG3 50 DCI No. Part No. Description Unit Front panel A Air inlet ring Painting insulation plate Axial fan OD= DC motor for DCI Motor support Base painting Assy Partition Outdoor DC inverter controller (English) Gas valve (R410A) Liquid valve(r410a) EMI fliter board Chock Assy AC-IN connected wire Earthing wire for DCI Fuse connecting wire Therminal sheet Fuse stand JEF-511B(EHK P/N: ) Fuse 65TS(20A,230) Cable clip nylon poles terminal block Value cover Way valve coil way valve welding Assy way valve Compressor wire DC Inverter compressor Assy. 5CS130XCC Compressor top thermistor(ctt) Outside air thermistor(oat) Outside coil thermistor(oct) Suction coil thermistor(suct) Electronic expansion valve ZDPF(L)-1.6C-01-RK f EEV COIL QA(L)12-HR-01A-RK Right side panel Back side net Condenser soldering assy Bridge Painting top cover Gasket for axial fan Nut M5 L Handle Left side panel painting plate

66 APPENDIX A APPENDIX A INSTALLATION AND OPERATION MANUAL OPERATION MANUAL PXD 25, 35, 50 DCI INSTALLATION MANUAL PXD 25, 35, 50 DCI 13-1

67 ON GB I E DC Inverter Split system for Wall / ceiling mounting PXD 25 DCI 35 DCI 50 DCI IFEEL AUTO O FF 1 2 WK TEMP - + The appliance shall not be installed in the laundry. NOTE: This manual is for the single split application. For multi split applications please use installation manual supplied within outdoor unit package /01 INSTALLATION INSTRUCTION

68 PXD IT IS MANDATORY TO CUT OFF POWER SUPPLY BEFORE STARTING TO WORK IN THE ELECTRIC CASING BOXES. GENERAL RECOMMENDATIONS - Congratulations for having selected an ELECTRA air conditioner. SAFETY DIRECTIONS - Follow the safety rules in force when you are working on your appliance. - Installation and maintenance of the equipment must only be performed by qualified specialists in accordance with the rules of good workmanship and prevailing standards and instructions. - Make sure that the power supply and its frequency are adapted to the required electric current of operation, taking into account specific conditions of the location and the current required for any other appliance connected with the same circuit. WARNING - Cutoff power supply before starting to work on the appliance. The manufacturer declines any responsibility and the warranty becomes void if these instructions are not respected. - If you meet a problem, please call the Technical Department of your area. - If possible, assemble the mandatory or optional accessories before placing the appliance on its final Iocation.(see instruc- tions provided with each accessory) - In order to become fully familiar with the appliance, we suggest to read also our Technical Instructions. - The information contained in these Instructions are subject to modification without advance notice. 2

69 PXD SUMMARY DESCRIPTION Installation/service tools...4 Dimensions of Indoor Unit...5 Dimensions of Outdoor Units...5 INSTALLATION Location of the Indoor Unit Location of the Outdoor Unit...8 Refrigerant Line...9 Installation Electrical Connections MAINTENANCE Scheduled Maintenance CONTENTS OF PARCEL 1 PXD. 1 wall support. (supplied fitted to the unit). 1 bag containing hardware. 1 bag containing documentation. 1 IR remote control + support. 1 template for positioning connection tubing. + connection tubing fixing clamps 1 assembly template (distance between mounting holes) 1 sensor connecting cable 1 active charcoal filter and its support 3

70 PXD INSTALLATION/SERVICE TOOLS CAUTION New Refrigerant Air Conditioner Installation THIS AIR CONDTIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE LAYER. R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with the adoption of the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigeration machine oil does not enter into the new type refrigerant R410A air conditioner circuit. To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port on main unit and installation tools are different from those used for the conventional refrigerant units. Accordingly, special tools are required for the new refrigerant (R410A) units. For connecting pipes, use new and clean piping materials with high pressure fittings made for R410A only, so that water and/or dust does not enter. Moreover, do not use the existing piping because there are some problems with pressure fittings and possible impurities in existing piping. Changes in the product and components In air conditioners using R410A, in order to prevent any other refrigerant from being accidentally charged, the service port diameter size of the outdoor unit control valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch) In order to increase the pressure resisting strength of the refrigerant piping, flare processing diameter and opposing flare nuts sizes have been changed. (for copper pipes with nominal dimensions 1/2 and 5/8) New tools for R410A New tools for R410A Applicable to R22 model Changes Gauge manifold Charge hose Electronic balance for refrigerant charging Torque wrench (nominal dia. 1/2, 5/8) Flare tool (clutch type) Gauge for projection adjustment Vacuum pump adapter Gas leakage detector As the working pressure is high, it is impossible to measure the working pressure using conventional gauges. In order to prevent any other refrigerant from being charged, the port diameters have been changed. In order to increase pressure resisting strength, hose materials and port sizes have been changed (to 1/2 UNF 20 threads per inch). When purchasing a charge hose, be sure to confirm the port size. As working pressure is high and gasification speed is fast, it is difficult to read the indicated value by means of charging cylinder, as air bubbles occur. The size of opposing flare nuts have been increased. Incidentally, a common wrench is used for nominal diameters 1/4 and 3/8. By increasing the clamp bar's receiving hole size, strength of spring in the tool has been improved. Used when flare is made by using conventional flare tool. Connected to conventional vacuum pump. It is necessary to use an adapter to prevent vacuum pump oil from flowing back into the charge hose. The charge hose connecting part has two ports -- one for conventional refrigerant (7/16 UNF 20 threads per inch) and one for R410A. If the vacuum pump oil (mineral) mixes with R410A a sludge may occur and damage the equipment. Exclusive for HFC refrigerant. Incidentally, the "refrigerant cylinder" comes with the refrigerant designation (R410A) and protector coating in the U.S's ARI specified rose color (ARI color code: PMS 507). Also, the "charge port and packing for refrigerant cylinder" requires 1/2 UNF 20 threads per inch corresponding to the charge hose's port size. 4

71 DIMENSIONS OF INDOOR UNIT PXD R410A PXD ~230V PXD DCI PXD DCI PXD DCI DCI 50 DCI DIMENSIONS OF OUTDOOR UNITS R410A MODEL DCI AIR INTAKE 293 AIR OUTLET 5

72 PXD INSTALLATION OF THE PXD INDOOR UNIT - Install the wall support of the PXD using the installation template supplied with the unit. - The cut-outs for the unit are shown on this template. - Reminder of MINIMUM clearances to be provided. - Coolant connections can be made on the LH side, on the RH side or at the rear. - Condensate evacuation possibilities: right, left, rear and front in the case of a ceiling mounted unit. (2 condensate outputs are available on the recovery tray). PXD 6

73 INSTALLATION PXD - Remove the wall support mounted at the rear of your PXD. - To install the wall support, locate the template in order to observe the correct distance between mounting holes marked on it. CAUTION- be careful with the condensate evacuation point: After determining the outlet for the condensate evacuation (LH, RH, rear), make sure that the wall mounting is installed with a slope which favours this evacuation. - Secure the wall support with 4 screws (not supplied). 7

74 PXD INSTALLATION OF THE OUTDOOR UNIT - Minimum clearance to respect (in mm). DCI DRAINING CONDENSATES 2 1 CAUTION If the heat pump outdoor unit is installed in an area where the outdoor temperature may fall below o + 1 C, it is mandatory to provide a system preventing any risk of freezing of the condensate (e.g. heating wire). 8

75 REFRIGERANT CONNECTIONS PXD R410A PXD DCI The indoor unit may be installed above or below the unit - The flare couplings are available as accessories in standard lengths of 2.5, 5 and 8m. - The pipes are delivered coiled and equipped with flare nuts. - Carefully uncoil the pipes in the opposite direction from the tums so as not to flatten them. 9

76 PXD INSTALLATION OF TUBING ON WALL SUPPORT - The main advantage of your PXD productis the possibility of locating the coolant tubing on the wall support before installing the unit (using the template supplied). - Place the tube locating template on the wall support. INSTALLATION OF TUBING ON WALL SUPPORT - After choosing your coolant tubing input location (right, left or rear), you can set up your tubing. To do this, use the installation template in order to form the tubes correctly and thus facilitate connection. PXD-25-DCI PXD-35-DCI PXD-50-DCI 10

77 PXD INSTALLATION OF TUBING ON WALL SUPPORT - Locate the LIQUID tube above the GAS tube. - Fit the nuts of the (formed) tubing into the recess provided on the template. - Secure the tubing with the clamps provided. - Remove the tubing template; you can now install your unit on its support. NOTE output to the rear - The slanted hole prevents condensates or rain from entering the unit. - Fit a Dia. 70 mm sleeve into the hole. 11 APPENDIX A

78 PXD INSTALLATION OFTHE INDOOR UNIT PXD - On the PXD, remove: The intake gril. The LH and RH side panels. 3 4* FOR THE AIR INLET GRILL: 1 Pull the gril forwards. 2 Remove the two end screws. 3 Unscrew the central screw, but do not remove it completely. 4 Unhook the grid. FOR THE SIDE PANELS: 5 Remove the side panels (downward movement) 12

79 INSTALLATION OF THE PXD ON THE WALL SUPPORT PXD - Refer to the diagram below, for installation of the PXD. - Ceiling mounting (referto the NOTE below). 13

80 PXD CONNECTION OF CONDENSATE EVACUATION TUBE - Water condensation must be evacuated directly to the outside; observe an appropriate slope for the evacuation duct, which should slope downwards in the case of a connection to the wastewater system (2.5 cm/m slope). - An S-bend must be installed on the evacuation duct, below the level of the recovery tray of the unit. - Provide insulation for the evacuation tube in the case of a risk of freezing or conden- sation. - Evacuation with pump kit: (refer to instruc- tions provided with kit). - The unit is supplied with an evacuation tube. - The right and left outlets are blocked off by a plug. Do not forget to remove this plug before connecting the evacuation tube. Fuse 3.15A Condensate recovery tray Evacuation tube GAS tube - In the case of a ceiling mounted installation, run the evacuation tube down along the side panel and secure it with clamps as shown below. Also break the preformed cut-out in the comer of the intake grid. 14

81 VACUUM OF COOLING PIPES AND INDOOR UNIT PXD - Only the outdoor unit is charged with R410A cooling fluid. The indoor unit contains a small quantity of a neutral gas. This the reason it is imperative to vacuum the linking pipes and the indoor unit. ASSEMBLY - The outdoor unit is equipped with a valve allowing to vacuum the installation (large valve) 1 Connect the connectingpipes to the outdoor unit by FLARE NUTS and to the indoor unit by BRAZING - To obtain the right tightening, cover the sur- face with cooling oil. - The use of a counter wrench is required to tighten the valves. - The values of the tightening torque are shown in the table below. of the Pipe Pipe 1/4" Pipe 3/8" Pipe 1/2" Pipe 5/8" Pipe 7/8" Torque Nm Nm Nm Nm Nm 2 Connect the vacuum pump with the flare coupling of the outdoor unit equipped with a process valve. 3 Start the vacuum pump and check that the needle of the indicator goes down to - 0,2 mm Hg. The pump should run during at least 15 minutes. 4 Before disconnecting the vacuum pump, check that the vacuum indicator remains in the same position during five minutes. 5 Disconnect the vacuum pump. 6 Remove the cap of the "GAS" and "LIQUID" valves and open them with a hexagonal wrench to free the R410A contained in the outdoor unit. 7 Check that the linking pipes are sealed. Use an electronic leak detector or a soapy sponge. 15

82 PXD CONFIGURATION OF REMOTE CONTROL To change the configuration: 1 - Remove the batteries. 2 - Set the switches. 3 - Reinstall the batteries. 4 - MANDATORILY perform a RESET (see below). RESET FUNCTION: 1 - Remove one batteryand reinstall the battery. 2 - Simultaneously press these 4 keys until the symbols are no longer displayed. The four keys to be pressed are: A Heat / Cool (without auto Cool / Heat mode) Heat / Cool (all modes available) Auto Cool/Heat mode or fan mode ELECTRIC SPECIFICATIONS PXD-25-DCI PXD-35-DCI PXD-50-DCI IMPORTANT * These values are given for guidance. They must be checked and adjusted according to prevailing standards. They depend on the system installed and the cables used. 16

83 PXD ELECTRICAL CONNECTION BETWEEN INDOOR AND OUTDOOR UNIT ELECTRICAL REQUIREMENTS Electrical wiring and connections should be made by qualified electricians and in accordance with local electrical codes and regulation. The air conditioner units must be grounded. The air conditioner unit must be connected to an adequate power outlet from a separate branch circuit protected by a time delay circuit breaker, as specified on unit's nameplate. Voltage should not vary beyond 10% of the rated voltage A B L 30 m To connect the indoor unit to the outdoor unit use the following electrical cables. Electrical connections: A B Capacity Power input cable Cable between indoor and outdoor unit 9000 Btu (2500 W) model Btu (3500 W) model 2 3 wires 1.5mm 2 4 wires 1.5mm Btu (5000 W) model 2 3 wires 2.5mm 2 4 wires 2.5mm 2. Prepare the cable ends for the power input and for the cables between outdoor and indoor units as shown in figure 15a and 15b respectively. 3. Connect the cable ends to the terminals of the indoor and outdoor units, as shown in fig Secure the multiple wire power cable with the cable clamps N C/5 L/4 N/3 NOTES: The wire color code can be selected by the installer. ~230V - 50HZ N L 17

84 PXD INDICATOR LIGHTS AND CONTROLS ON THE UNIT A) HEATING Comes on during operation. Heating and fil-tration of the air in the room. Sustainment of required ambient temperature. B) COOLING Comes on during operation. Cooling, dehumidification and filtration of the air in the room. Sustainment of required ambient temperature. C) VENTILATION Comes on during operation. The unit is running in ventilation mode only. D) POWER Comes on as soon as the unit is energised. E) PROGRAMMING Comes on during operation. Flashes to indicate that the remote control signal has been received and stored in the memory. F) FILTER Comes on when the air filter needs to be cleaned. After cleaning and re-installation of the filter, the system must be reset (RESET button). G) TEMPERATURE Displays the set temperature o 18 lit = 18 C o 20 lit =20 C o 18 & 20 lit =19 C H) FAN High speed. H I) FAN Medium speed. M J) FAN Low speed. L K) FAN Automatic. A L) RESET Press to switch off the indicator light and activate the filter function, after cleaning and re-installing the filter. Press to cancel the audible warning. M) ON/OFF Unit On/Off indicator light. The light will blink when protection happens. Noise may occur when deicing for multi splits. 18

85 ACTIVE CHARCOAL FILTER PXD - An active charcoal filter and its support are supplied as accessories with your product. (1 per filter) - in order to optimise air filtration, you can install it as follows. MAINTENANCE AND REPAIR BEFORE UNDERTAKING MAINTENANCE OPERATIONS, MAKE SURE THAT THE AIR CONDITIONER IS DISCONNECTED FROM THE MAINS. Cleaning of air filter Your air conditioner has an air filter clogging indicator light. When this indicator light F comes on, the filter must be cleaned. - To remove the filter, pull the inlet grid forward and press the filters slightly downwards to unclip them. - Reset the unit by pressing the Reset button. The filter indicator light F goes out. Do not operate the air conditioner without the filter! Cleaning of the air conditioner - Rub the inside of the unit with a soft, dry cloth. - Do not use hot water or volatile detergents, which could damage the face of the air conditioner. Precautions to be taken - Check that there are no obstacles preventing the flow of inlet air and pulsed air, on both the indoor and outdoor units. - Check that the air conditioner is correctly connected. Protection of the electronic system - The indoor unit and the remote control must not be located less than one metre from a television set, a radio or any other electrical appliance, in order to avoid interference. - Protect the unit against direct sunlight. Replacement of the remote control batteries - Remove the batteries from the remote control unit via the rear flap. - Fit two new 1.5 V type AAA dry cell batteries. - Used batteries must be recycled. 19