Airwell K 12 DCI Service Manual
The Airwell K 12 DCI is a split-system air conditioner designed for residential and commercial applications. It offers a range of features including DC inverter technology, R410A refrigerant, high COP (energy efficiency), and a Lego concept for easy installation. The unit is pre-charged for convenience and has a networking system connectivity for advanced control. It also features base heater connection, cooling operation down to -10°C, and heating operation down to -15°C. The K 12 DCI is known for its low noise levels and user-friendly design.
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Service Manual K DCI Inverter series Indoor Units Outdoor Units K 9 DCI INV GC9 DCI INV K 12 DCI INV GC12 DCI INV K 18 DCI INV GC18 DCI INV REFRIGERANT R410A TM KDCI-A-1-GB HEAT PUMP DECEMBER 2004 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 ....... 0 ........ December 2004 Total number of pages in this publication is 62 consisting of the following: Page No. Revision No. # Page No. Revision No. # Page No. Revision No. # Title ....................... 0 A ........................... 0 i ............................. 0 1-1 - 1-4 ................ 0 2-1 - 2-4 ................ 0 3-1 - 3-2 ................ 0 4-1 - 4-2 ................ 0 5-1 - 5-12 .............. 0 6-1 - 6-8 ................ 0 7-1 - 7-2 ................ 0 8-1 - 8-2 ................ 1 9-1 - 9-2 ................ 0 10-1-10-2 .............. 0 11-1-11-16............. 2 12-1-12-8 .............. 0 13-1-13-10 ............ 0 Appendix -A ...........0 • Zero in this column indicates an original page. *Due to constant improvements please note that the data on this service manual can be modified with out notice. **Photos are not contractual A Revision Y05-02 Service Manual − K DCI TABLE OF CONTENTS Table of Contents 1. INTRODUCTION ...................................................................................................1-1 2. PRODUCT DATA SHEET ......................................................................................2-1 3. RATING CONDITIONS ..........................................................................................3-1 4. OUTLINE DIMENSIONS .......................................................................................4-1 5. PERFORMANCE DATA .......................................................................................5-1 6. PRESSURE CURVES ...........................................................................................6-1 7. ELECTRICAL DATA ..............................................................................................7-1 8. WIRING DIAGRAMS .............................................................................................8-1 9. REFRIGERATION DIAGRAMS .............................................................................9-1 10. TUBING CONNECTIONS......................................................................................10-1 11. CONTROL SYSTEM .............................................................................................11-1 12. TROUBLESHOOTING ..........................................................................................12-1 Service Manual - K DCI i INTRODUCTION 1. INTRODUCTION 1.1 General The new K DCI INVERTERS split Cassette range comprise the following RC (heat pump) models: • K 9 DCI INV • K 12 DCI INV • K 18 DCI INV The New DCI K units can be easily fitted to residential and commercial applications featuring esthetic design, compact dimensions, and low noise operation. 1.2 Main Features The K DCI INV series benefits from the most advanced innovations, namely: • DC Inverter technology • R410A • High COP (level A) • Lego Concept • Pre-Charged units up to the max’ allowing tubing distance • Networking system connectivity • Base heater connection • Cooling operation at outdoor temperature down to -10ºC • Heating operation at outdoor temperature down to -15ºC • Bended indoor coil with treated aluminum fins and coating for improved efficiency. • Easy access to the interconnecting tubing and wiring connections. • Automatic treated air sweep. • Low indoor and outdoor noise levels. • Easy installation and service. Service Manual - K DCI 1-1 INTRODUCTION 1.3 Filtration The K DCI INV series presents several types of air filters: 1.4 • Easily accessible, and re-usable pre-filters (mesh) • Pre-charged electrostatic filter (disposable) • Active carbon filter (disposable) Control The microprocessor indoor and outdoor controllers, and an infrared remote control, supplied as standard, provide complete operating function and programming. Remote controllers: RC-2/3/4/5/7, RCW, µBMS Networking system AircoNet version 4.2 and up, MIU SW version H8 and up For further details please refer to the Operation Manual. 1.5 Outdoor Unit The K DCI INV 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. • GC 9 DCI • GC 12 DCI • GC 18 Outdoor Unit Features: GC 9,12, 18, DCI 3 LED’s Optional Variable Speed DC Inverter No Features Display Base Heater Outdoor Fan M2L cable Port 1.6 Tubing Connections Flare type interconnecting tubing to be produced on site. For further details please refer to the Installation Manual. 1.7 1.8 Accessories • MIU (K) MODBUS Interface Unit • Base heater • M2L cable Inbox Documentation Each unit is supplied with its own installation and operation manuals. 1-2 Service Manual - K DCI INTRODUCTION 1.9 Matching Table 1.9.1 R410A INDOOR UNITS OUTDOOR UNITS MODEL REF. FLO9DCI GC 9 DCI R410A √ GC 12 DCI R410A GC 18 DCI R410A FLO12 DCI K9 DCI K12 DCI K18 DC √ √ √ √ The above table lists outdoor units and K indoor units which can be matched together. In addition the listed outdoor units can be matched with other types of indoor units such as wall mounted, . Service Manual - K DCI 1-3 PRODUCT DATA SHEET 2. PRODUCT DATA SHEET 2.1 K9 DCI Model Indoor Unit Model Outdoor Unit K9 DCI ONGC9 DCI Installation Method Characteristics Flare Units Btu/hr W W W/W (1) Capacity (1) Power Input (1) COP Energy Efficiency Class Power Supply Rated Current Starting Current Circuit Breaker Rating Cooling Heating 8530 (5120-12970) 2500 (1500 - 3800) 590 (420-1000) 4.24 A 11600 (5120-17060) 3400 (1500 - 5000) 915 (400-1500) 3.72 A V/Ph/Hz A A A 220-240V / 1Ph / 50Hz 2.7 4.2 10.50 16 Fan Type & Quantity INDOOR (2) Airflow External Static Pressure (3) Sound Power Level (4) Sound Pressure Level Centrifugal*1 H/M/L Min-Max H/L H/L Moisture Removal Condensate Drain Tube I.D. Dimensions Weight Package Dimensions Units per Pallet Stacking Height W/H/D W/H/D 3 m /hr Pa dB (A) dB (A) L/hr mm mm kg mm Units Units OUTDOOR Refrigerant Control Compressor Type, Model Fan Type & Quantity Airflow Sound Power Level (4) Sound Pressure Level Dimensions Weight Package Dimensions Units per Pallet 570-500-435 600-530-450 N/A 42-48 32-38 42-47 32-37 1.0 16 287 22.7 415 10 5 571 685 H H H W/H/D W/H/D 3 m /hr dB (A) dB (A) mm kg mm Units 1780 60 50 61 51 795 610 40 38 655 9 945 g g/m 3 R410A 1100 No Need (mm)In (6.35) ¼” Suction Line (mm)In (9.53) ” m m 20 10 Max. Tubing Length Max. Height Difference 685 Electronic Expansion Valve Single Rotary DC Inverter Panasonic 5RS102XAB Axial *1 Stacking Height Refrigerant Type Refrigerant Chargeless Distance Additional Charge Per 1 Meter Liquid Line Connections Between Units 571 Units Operation Control Type 290 393 395 IR Remote Control (1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511. (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. Service Manual - K DCI 2-1 PRODUCT DATA SHEET 2.2 K12 DCI Model Indoor Unit K12 DCI Model Outdoor Unit Installation Method Characteristics OGC12 DCI Flare Units Btu/hr W (1) Capacity (1) Power Input (1) COP Energy Efficiency Class Power Supply Rated Current Starting Current Circuit Breaker Rating W W/W Heating 14620 (5100 - 18700) 4300 (1500 - 5500) 950 (420-1250) 3.68 A 1330 (400-1850) 3.23 A V/Ph/Hz A A A Fan Type & Quantity (2) Airflow External Static Pressure 220-240V / 1Ph / 50Hz 4.1 Centrifugal*1 3 m /hr Pa 580-510-435 H/L H/L dB (A) dB (A) L/hr mm mm kg 42-48 32-38 Sound Power Level (4) Sound Pressure Level Moisture Removal Condensate Drain Tube I.D. Dimensions Weight Package Dimensions Units per Pallet Stacking Height W/H/D W/H/D mm Units Units 42-47 32-37 1.5 16 287 24.4 571 685 415 10 5 685 H H H W/H/D 3 m /hr dB (A) dB (A) mm Single Rotary DC Inverter Panasonic 5RS102XAB Axial *1 1780 62 52 62 52 795 610 g g/m 40 38 655 9 3 R410A 1200 No Need Liquid Line (mm)In (6.35) ¼” Suction Line (mm)In (9.53) ” m m 20 10 Weight Package Dimensions Units per Pallet Stacking Height Refrigerant Type Refrigerant Chargeless Distance Additional Charge Per 1 Meter Max. Tubing Length Max. Height Difference W/H/D kg mm Units Units 945 Operation Control Type IR Remote Control (1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511. (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. 2-2 571 Electronic Expansion Valve Compressor Type, Model Fan Type & Quantity Airflow Sound Power Level (4) Sound Pressure Level Dimensions OUTDOOR 620-560-450 N/A Refrigerant Control Connections Between Units 5.6 10.50 16 H/M/L Min-Max (3) INDOOR Cooling 11940 (5100 - 14960) 3500 (1500 - 4400) Service Manual - K DCI 290 393 395 PRODUCT DATA SHEET 2.4 K18 DCI Model Indoor Unit K18 DCI Model Outdoor Unit Installation Method Characteristics OGC18 DCI Flare Units Btu/hr W (1) Capacity (1) Power Input (1) COP Energy Efficiency Class Power Supply Rated Current Starting Current Circuit Breaker Rating W W/W Heating 21500 (4610 - 25590) 6300 (1350 – 7500) 1550 (530 – 2000) 3.23 A 1740 (350 – 2080) 3.62 A V/Ph/Hz A A A Fan Type & Quantity (2) Airflow External Static Pressure 220-240V / 1Ph / 50Hz 7.1 Centrifugal*1 3 m /hr Pa 730-630-510 N/A H/M/L H/M/L dB (A) dB (A) L/hr mm mm kg 46 – 55 - 59 36 – 44 - 48.5 2 16 287 28 Sound Power Level (4) Sound Pressure Level Moisture Removal Condensate Drain Tube I.D. Dimensions Weight Package Dimensions Units per Pallet Stacking Height W/H/D W/H/D mm Units Units 571 685 OUTDOOR 685 Electronic Expansion Valve Compressor Type, Model Fan Type & Quantity Airflow Sound Power Level (4) Sound Pressure Level Dimensions Weight Package Dimensions Units per Pallet Stacking Height Refrigerant Type Refrigerant Chargeless Distance Additional Charge Per 1 Meter H H H W/H/D W/H/D SCROLL Panasonic 5CS130XCC03 Axial *1 2160 3 m /hr dB (A) dB (A) mm kg mm Units Units 62 52 63 53 795 610 945 655 9 3 R410A 1500 No Need g g/m Liquid Line (mm)In (6.35) ¼” Suction Line (mm)In (12.7) ½” m m 30 10 Max. Tubing Length Max. Height Difference 290 43 Operation Control Type IR Remote Control (1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511. (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. 2-4 571 415 10 5 Refrigerant Control Connections Between Units 8.0 10.50 16 H/M/L Min-Max (3) INDOOR Cooling 17060 (4610 – 21840) 5000 (1350 – 6400) Service Manual - K DCI 393 395 RATING CONDITIONS 3. RATING CONDITIONS Standard conditions in accordance with ISO 5151, ISO 13253 (for ducted units) and EN 14511. Cooling: Indoor: 27oC DB 19oC WB Outdoor: 35 oC DB Heating: Indoor: 20oC DB Outdoor: 7oC DB 6oC WB 3.1 Operating Limits Indoor Cooling Heating Voltage Outdoor Upper limit 32oC DB 23oC WB 46oC DB Lower limit 21oC DB 15oC WB -10oC DB Upper limit 27oC DB 24oC DB 18oC WB Lower limit 10oC DB -15oC DB -16oC WB 1PH 198 – 264 V 3PH N/A Service Manual - K DCI 3-1 OUTLINE DIMENSIONS 4. OUTLINE DIMENSIONS 4.1 Indoor Unit: K 9, 12, 18 DCI 4.2 Outdoor Unit: GC 9, 12, 18 DCI Service Manual - K DCI 4-1 PERFORMANCE DATA 5. PERFORMANCE DATA 5.1 K9 DCI 5.1.1 Cooling Capacity (kW) - Run Mode ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC] OD COIL ENTERING AIR DB TEMPERATURE [C0] DATA TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI -10 - 20 (protection range) 25 30 35 40 46 22/15 24/17 27/19 29/21 32/23 2.42 2.09 0.46 2.30 2.04 0.52 2.18 1.98 0.57 2.07 1.93 0.63 1.93 1.87 0.69 80 - 110 % of nominal 80 - 105 % of nominal 25 - 50 % of nominal 2.57 2.73 2.89 2.13 2.18 2.22 0.47 0.48 0.49 2.46 2.62 2.77 2.08 2.12 2.17 0.54 0.53 0.54 2.34 2.66 2.50 2.03 2.07 2.11 0.59 0.58 0.60 2.23 2.54 2.38 1.97 2.02 2.06 0.64 0.64 0.65 2.09 2.24 2.40 1.91 1.95 2.00 0.70 0.71 0.72 3.05 2.26 0.50 2.93 2.21 0.55 2.82 2.16 0.61 2.70 2.10 0.66 2.56 2.04 0.73 LEGEND TC SC PI WB DB ID OD Total Cooling Capacity, kW Sensible Capacity, kW Power Input, kW Wet Bulb Temp., (oC) Dry Bulb Temp., (oC) Indoor Outdoor Capacity Correction Factors Cooling Capacity Ratio Vs. Outdoor Temperature 1.2 Capacity Ration 5.1.2 – – – – – – – 1.1 1 0.9 0.8 0.7 0.6 0.5 20 25 30 35 40 45 Outdoor Temperature [deg C] Service Manual - K DCI 5-1 PERFORMANCE DATA 5.1.3 Heating Capacity (kW) - Run Mode ID COIL ENTERING AIR DB TEMPERATURE [ºC] OD COIL ENTERING AIR DB/ WB TEMPERATURE [ºC] DATA 15 20 25 TC PI TC PI TC PI TC PI TC PI TC PI TC PI TC PI TC PI 2.16 0.55 2.41 0.66 2.59 0.75 2.68 0.79 2.75 0.82 3.55 0.86 3.75 0.91 3.94 0.96 2.01 0.60 2.26 0.72 2.44 0.80 2.53 0.84 2.59 0.87 3.40 0.92 3.60 0.97 3.79 1.02 85 - 105 % of nominal 80 - 120 % of nominal 1.86 0.66 2.11 0.77 2.29 0.86 2.38 0.90 2.44 0.93 3.25 0.97 3.44 1.02 3.64 1.07 -15/-16 -10/-12 -7/-8 -1/-2 2/1 7/6 10/9 15/12 15-24 (Protection Range) LEGEND TC PI WB DB ID OD 5.1.4 – – – – – – Total Cooling Capacity, kW Power Input, kW Wet Bulb Temp., (oC) Dry Bulb Temp., (oC) Indoor Outdoor Capacity Correction Factors Heating Capacity Ratio Vs. Outdoor Temperature Capacity Ration 1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 -15 -10 -5 0 5 Outdoor WB Temperature [deg C] 5-2 Service Manual - K DCI 10 15 PERFORMANCE DATA Capacity Correction Factor Due to Tubing Length 5.2.1 Cooling Capacity Ratio 5.2 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Tubing Length [m] Heating 1.02 1.00 Capacity Ratio 5.2.2 0.98 0.96 0.94 0.92 0.90 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Tubing Length [m] Service Manual - K DCI 5-3 PERFORMANCE DATA 5.3 K12 DCI 5.3.1 Cooling Capacity (kW) - Run Mode ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC] OD COIL ENTERING AIR DB TEMPERATURE [ºC] -10 - 20 (protection range) 25 30 35 40 46 DATA TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI 22/15 24/17 27/19 29/21 32/23 3.38 2.65 0.75 3.22 2.58 0.83 3.06 2.51 0.92 2.89 2.45 1.01 2.70 2.37 1.11 80 - 110 % of nominal 80 - 105 % of nominal 25 - 50 % of nominal 3.60 3.83 4.05 2.70 2.75 2.81 0.76 0.78 0.79 3.44 3.66 3.88 2.63 2.69 2.74 0.86 0.85 0.88 3.28 3.72 3.50 2.57 2.62 2.67 0.95 0.94 0.96 3.12 3.56 3.34 2.50 2.55 2.61 1.02 1.04 1.05 2.92 3.14 3.36 2.42 2.47 2.53 1.13 1.14 1.16 4.27 2.86 0.80 4.11 2.79 0.89 3.94 2.73 0.98 3.78 2.66 1.07 3.58 2.58 1.17 LEGEND TC SC PI WB DB ID 5.3.2 – – – – – – Total Cooling Capacity, kW Sensible Capacity, kW Power Input, kW Wet Bulb Temp., (oC) Dry Bulb Temp., (oC) Indoor Capacity Correction Factors Cooling Capacity Ratio Vs. Outdoor Temperature Capacity Ration 1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 20 25 30 35 Outdoor Temperature [deg C] 5-4 Service Manual - K DCI 40 45 PERFORMANCE DATA 5.3.3 Heating Capacity (kW) - Run Mode ID COIL ENTERING AIR DB TEMPERATURE [ºC] OD COIL ENTERING AIR DB/ WB TEMPERATURE [ºC] -15/-16 -10/-12 -7/-8 -1/-2 2/1 7/6 10/9 15/12 15-24 (Protection Range) DATA 15 20 25 TC PI TC PI TC PI TC PI TC PI TC PI TC PI TC PI TC PI 2.74 0.80 3.05 0.96 3.28 1.09 3.39 1.15 3.47 1.19 4.49 1.25 4.74 1.32 4.99 1.40 2.55 0.88 2.86 1.04 3.09 1.17 3.20 1.23 3.28 1.27 4.30 1.33 4.55 1.40 4.80 1.48 85 - 105 % of nominal 80 - 120 % of nominal 2.35 0.96 2.66 1.12 2.90 1.25 3.01 1.31 3.09 1.35 4.11 1.41 4.36 1.49 4.60 1.56 LEGEND TC PI WB DB ID OD Total Cooling Capacity, kW Power Input, kW Wet Bulb Temp., (oC) Dry Bulb Temp., (oC) Indoor Outdoor Capacity Correction Factors Heating Capacity Ratio Vs. Outdoor Temperature 1.2 Capacity Ration 5.3.4 – – – – – – 1.1 1 0.9 0.8 0.7 0.6 0.5 -15 -10 -5 0 5 10 15 Outdoor WB Temperature [deg C] Service Manual - K DCI 5-5 PERFORMANCE DATA Capacity Correction Factor Due to Tubing Length 5.4.1 Cooling Capacity Ratio 5.4 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Tubing Length [m] 5.4.2 Heating 1.02 Capacity Ratio 1.00 0.98 0.96 0.94 0.92 0.90 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Tubing Length [m] 5-6 Service Manual - K DCI PERFORMANCE DATA 5.7 K18 DCI 5.7.1 Cooling Capacity (kW) - Run Mode ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC] OD COIL ENTERING AIR DB TEMPERATURE [ºC] -10 - 20 (protection range) 25 30 35 40 46 DATA TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI 22/15 24/17 27/19 29/21 32/23 4.85 3.30 1.20 4.60 3.17 1.37 4.35 3.04 1.54 4.10 2.91 1.70 3.80 2.76 1.90 80 - 110 % of nominal 80 - 105 % of nominal 25 - 50 % of nominal 5.13 5.42 5.70 3.35 3.40 3.45 1.23 1.26 1.28 4.88 5.17 5.45 3.22 3.27 3.32 1.42 1.40 1.45 4.63 5.20 4.92 3.09 3.14 3.19 1.59 1.56 1.62 4.39 4.96 4.67 2.96 3.01 3.06 1.73 1.76 1.78 4.09 4.37 4.66 2.81 2.86 2.91 1.93 1.96 1.98 5.99 3.50 1.31 5.74 3.37 1.48 5.49 3.24 1.64 5.24 3.11 1.81 4.94 2.95 2.01 LEGEND TC SC PI WB DB ID OD 5.7.2 – – – – – – – Total Cooling Capacity, kW Sensible Capacity, kW Power Input, kW Wet Bulb Temp., (oC) Dry Bulb Temp., (oC) Indoor Outdoor Capacity Correction Factors Cooling Capacity Ratio Vs. Outdoor Temperature Capacity Ration 1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 20 25 30 35 Outdoor Temperature [deg C] 5-10 Service Manual - K DCI 40 45 PERFORMANCE DATA 5.7.3 Heating Capacity (kW) - Run Mode ID COIL ENTERING AIR DB TEMPERATURE [ºC] OD COIL ENTERING AIR DB/WB TEMPERATURE [ºC] -15/-16 -10/-12 -7/-8 -1/-2 2/1 7/6 10/9 15/12 15-24 (Protection Range) DATA 15 20 25 TC PI TC PI TC PI TC PI TC PI TC PI TC PI TC PI TC PI 2.66 1.15 3.52 1.30 4.16 1.41 4.47 1.46 4.69 1.50 6.24 1.56 6.56 1.59 6.88 1.62 2.28 1.23 3.13 1.38 3.77 1.49 4.09 1.55 4.30 1.58 5.85 1.64 6.18 1.67 6.50 1.70 85 - 105 % of nominal 80 - 120 % of nominal 1.90 1.31 2.75 1.46 3.39 1.57 3.71 1.63 3.92 1.66 5.47 1.72 5.79 1.75 6.12 1.78 LEGEND TC PI WB DB ID OD Total Cooling Capacity, kW Power Input, kW Wet Bulb Temp., (oC) Dry Bulb Temp., (oC) Indoor Outdoor Capacity Correction Factors Heating Capacity Ratio Vs. Outdoor Temperature Capacity Ration 5.7.4 – – – – – – 1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 0.4 -15 -10 -5 0 5 10 15 Outdoor WB Temperature [deg C] Service Manual - K DCI 5-11 PERFORMANCE DATA 5.8 Capacity Correction Factor Due to Tubing Length 5.8.1 Cooling 1.001 Capacity Ratio 1.000 0.999 0.998 0.997 0.996 0.995 0.994 0.993 0 5 10 15 20 25 30 35 Tubing Length[m] 5.8.2 Heating 1.02 Capacity Ratio 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.86 0 5 10 15 20 25 30 35 Tubing Length[m] 5-12 Service Manual - K DCI PRESSURE CURVES 6. PRESSURE CURVES 6.1 Model: K 9 DCI 6.1.1 Cooling – Test Mode Suction Pressure Vs.Outdoor Temp' - Cooling Suction Pressure [kPa] 1400 Indoor DB/WB Tem p. 1300 1200 22/15 1100 1000 24/17 900 27/19 800 29/21 700 32/23 600 500 10 15 20 25 30 35 40 45 Outdoor DB Temperature [ºC] Discharge Pressure [kPa] Discharge Pressure Vs.Outdoor Temp'- Cooling 4000 3750 3500 3250 3000 2750 2500 2250 2000 1750 1500 1250 1000 Indoor DB/WB 22/15 24/17 27/19 29/21 32/23 10 15 20 25 30 35 40 45 Outdoor DB Temperature [ºC] Service Manual - K DCI 6-1 PRESSURE CURVES 6.1.2 Heading – Test Mode Suction Pressure [kPa] Suction Pressure Vs. Outdoor Temp' - Heating 1300 1200 1100 1000 900 800 700 600 500 400 300 200 Indoor DB 15 20 25 -15 -10 -5 0 5 10 15 Outdoor WB Temperature[ºC] Discharge Pressure [kPa] Discharge Pressure Vs.Outdoor Temp'- Heating 4000 3750 3500 3250 3000 2750 2500 2250 2000 1750 1500 1250 1000 Indoor DB 15 20 25 -15 -10 -5 0 5 Outdoor WB Temperature [ºC] 6-2 Service Manual - K DCI 10 15 PRESSURE CURVES 6.2 Model: K 12 DCI 6.2.1 Cooling – Test Mode Suction Pressure Vs.Outdoor Temp' - Cooling Suction Pressure [kPa] 1400 Indoor DB/WB 1300 1200 22/15 1100 24/17 1000 900 27/19 800 29/21 700 32/23 600 500 10 15 20 25 30 35 40 45 Outdoor DB Temperature [ºC] Discharge Pressure [kPa] Discharge Pressure Vs.Outdoor Temp'- Cooling Indoor DB/WB 4000 3750 3500 3250 3000 2750 2500 2250 2000 1750 1500 1250 1000 22/15 24/17 27/19 29/21 32/23 10 15 20 25 30 35 40 45 Outdoor DB Temperature [ºC] Service Manual - K DCI 6-3 PRESSURE CURVES 6.2.2 Heating – Test Mode Suction Pressure Vs.Outdoor Temp' - Cooling Suction Pressure [kPa] 1400 Indoor DB/WB 1300 1200 22/15 1100 24/17 1000 900 27/19 800 29/21 700 32/23 600 500 10 15 20 25 30 35 40 45 Outdoor DB Temperature [ºC] Discharge Pressure [kPa] Discharge Pressure Vs.Outdoor Temp'- Cooling Indoor DB/WB 4000 3750 3500 3250 3000 2750 2500 2250 2000 1750 1500 1250 1000 22/15 24/17 27/19 29/21 32/23 10 15 20 25 30 35 Outdoor DB Temperature [ºC] 6-4 Service Manual - K DCI 40 45 PRESSURE CURVES 6.4 Model: K 18 DCI 6.4.1 Cooling – Test Mode Suction Pressure Vs.Outdoor Temp' - Cooling Suction Pressure [kPa] 1400 Indoor DB/WB 1300 1200 1100 22/15 1000 900 24/17 800 29/21 27/19 700 32/23 600 500 10 15 20 25 30 35 40 45 Outdoor DB Temperature[ºC] Discharge Pressure [kPa] Discharge Pressure Vs.Outdoor Temp' - Cooling 4250 4000 3750 3500 3250 3000 2750 2500 2250 2000 1750 1500 1250 1000 Indoor DB/WB 22/15 24/17 27/19 29/21 32/23 10 15 20 25 30 35 40 45 Outdoor DB Temperature[ºC] Service Manual - K DCI 6-7 PRESSURE CURVES 6.4.2 Cooling – Test Mode Suction Pressure Vs.Outdoor Temp' - Heating Suction Pressure [kPa] 1100 1000 900 Indoor DB 800 15 700 20 600 25 500 400 300 200 -15 -10 -5 0 5 10 15 Outdoor WB Temperature[ºC] Discharge Pressure [kPa] Discharge Pressure Vs.Outdoor Temp' - Heating 4000 3750 3500 3250 3000 2750 2500 2250 2000 1750 1500 1250 1000 Indoor DB 15 20 25 -15 -10 -5 0 5 Outdoor WB Temperature[ºC] 6-8 Service Manual - K DCI 10 15 ELECTRICAL DATA 7. ELECTRICAL DATA 7.1 Single Phase Units K 9 DCI Model K 12 DCI K 18 DCI Power Supply Connected to Maximum Current Inrush Current (a) Starting Current (b) Circuit breaker 1 PH, 220-240 VAC, 50Hz Indoor 10 A 12 A 35 A 10 A 10.5 A 16 A 20 A Power supply wiring no. x cross section 3 X 1.5 mm2 3 X 2.5 mm2 Interconnecting cable no. x cross section 4 X 1.5 mm2 4 X 2.5 mm2 (a) Inrush current is the current when power is up (charging the DC capacitors at outdoor unit controller). (b) Starting current is the current when starting the compressor. NOTE Power wiring cord should comply with local lows and electrical regulations requirements Service Manual - K DCI 7-1 Red Brown Black P1 P4 12 34 56 P16 P17 P18P21P22 Service Manual - K DCI COM N-F Red Blue L-F NCOM L N COM EARTH EARTH Black Y/G FUSE N/3 L/4 C/5 EEV P7 6 543 21 Brown Red Y/G magnetic ring EARTH L N COMN-COM EMI filter PCB JP9 123456 P12 Blue Brown Red Y/G P6 1 2 3 4 POWER SUPPLY Blue Brown Y/G Red K9, 12, 18 DCI Y/G P20 P8 8.1 megatool 12 12 P19 P2 12 12 WIRING DIAGRAMS Outdoor Unit Controller PCB 1 2 12 Reverse Base valve heater OAT OCT CTT SUCT Display 8. P10 U VW P3 P9 P11 P13 P14 White Choke coil Red Blue OFAN EARTH Vcc Vsp FG Black Orange Yellow Blue COMP Vdc Outdoor Unit Circuit Diagram WIRING DIAGRAMS 8-1 REFRIGERATION DIAGRAMS 9. REFRIGERATION DIAGRAMS 9.1 K 9, 12,18 DCI Service Manual - K DCI 9-1 TUBING CONNECTIONS 10. TUBING CONNECTIONS TUBE (Inch) ¼” ⅜” ½” ⅝” ¾” 11-13 13-20 11-13 40-45 13-20 11-13 60-65 18-25 11-13 70-75 18-25 11-13 80-85 40-50 11-13 TORQUE (Nm) Flare Nuts Valve Cap Service Port Cap 1. 2. 3. 4. 5. 6. 7. 8. Valve Protection Cap-end Refrigerant Valve Port (use Allen wrench to open/close) Valve Protection Cap Refrigerant Valve Service Port Cap Flare Nut Unit Back Side 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. Service Manual - K DCI 10-1 CONTROL SYSTEM 11. CONTROL SYSTEM 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. 11.1.1 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 nless 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. 11.1.2 Compressor Frequency Control 11.1.2.1 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 Low Max NLOADIF1C Medium Max NLOADIF2C High Max NLOADIF3C Turbo Max NLOADIF4C Auto Max NLOADIF5C Maximum NLOAD Heating 127 127 127 127 127 NLOAD limits as a function of power shedding: Mode Power Shedding OFF Cool No limit Heat No limit Power Shedding ON Nominal Cooling Nominal Heating 11.1.3 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 127 10 < NLOAD < 127 10 0 Target Frequency Maximum frequency Interpolated value between minimum and maximum frequency Minimum frequency Compressor is stopped Service Manual - K DCI 11-1 CONTROL SYSTEM Target frequency limits as a function of outdoor air temperature )OAT(: OAT Range Cool mode limits Heat mode limits OAT < 6 No limit MaxFreqAsOATC 6 ≤ OAT < 15 MaxFreqAsOAT1H 15 ≤ OAT < 24 MaxFreqAsOAT2H 24 ≤ OAT No limit 11.1.4 Frequency Changes Control Frequency change rate is 1 Hz/sec. 11.1.5 Compressor Starting Control Frequency Step 3 Step 2 Step 1 1 Minute 1 Minute Time Min 10 Minutes 11.1.6 Minimum On and Off Time 3 minutes. 11.1.7 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. 11.1.7.1 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. 11-2 Service Manual - K DCI CONTROL SYSTEM 11.1.8 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 > 50. 11.1.9 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, outdoor air temperature (OAT) and heat sink temperature (HST). Routine A B C D Conditions Heating with OAT < 150C or Cooling with OAT > 200C, or HST > 500C or Faulty OAT Cooling with 200C > OAT > 500C Cooling with 70C > OAT Heating with OAT > 150C Compressor Frequency (CF) CF= 0 10 ≤ CF < OFLowFreq 10 ≤ CF < OFMedFreq OFMedFreq ≤ CF Outdoor Fan Speed Routine A Routine B OFF OFF Low Low Medium Low High Low Routine C OFF Very Low Very Low Low Routine D OFF Low Low 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. 11.1.10 EEV (electronic Expansion valve) Control EEV opening is defined as EEV = EEV OL + EEVCV EEVOL is the initial EEV opening as a function of the compressor frequency, operation mode, unit model and capacity. EEVCV is a correction value for the EEV opening that is based on the compressor temperature. During the first 10 minutes of compressor operation EEVCV = 0. Once the first 10 minutes are over, the correction value is calculated as follow: EEVCV(n) = EEVCV(N-1) + EEVCTT EEVCTT 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. 11.1.11 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. 11.1.12 Ioniser Control Ioniser is on when unit is on AND indoor fan is on AND Ioniser power switch (on Ioniser) is on. Service Manual - K DCI 11-3 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<20C. When OAT is disconnected, Base Heater will be on when unit is in heating. 11.2 Fan Mode In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed. In AutoFan user setting, fan speed will be adjusting automatically according to the difference between actual room temperature and user set point temperature. 11.3 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 ad8usted automatically according to the calculated NLOAD. 11.4 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 adng to the calculated NLOAD. 11.4.1 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. Model Wall mounted Cassette Ducted Floor/Ceiling 11-4 J2 Shorted Compensation Disabled Compensation Enabled Compensation Enabled Compensation Disabled J2 Opened Compensation Enabled Compensation Disabled Compensation Disabled Compensation Enabled Service Manual - K DCI CONTROL SYSTEM 11.4.2 Indoor Fan Control in Heat Mode Indoor fan speed depends on the indoor coil temperature: ICTST 11.5 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 < -3. 11.6 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. 11.7 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. 11.7.1 Indoor Coil Defrost Protection ICT ICT < -2 -2 ≤ ICT < 0 0 ≤ ICT < 2 2 ≤ ICT < 4 4 ≤ ICT < 6 6 ≤ ICT < 8 8 ≤ ICT ICT Trend Fast Increasing SC D1 SR SR Norm Norm Normal Increasing No change Decreasing SC D1 SR SR Norm Norm SC D2 D1 SR SR Norm SC D2 D2 D1 SR SR Service Manual - K DCI Fast Decreasing SC D2 D2 D2 D1 SR 11-5 CONTROL SYSTEM 11.7.2 Indoor Coil over Heating Protection ICT ICT> 55 53 <ICT ≤ 55 49 < ICT ≤ 53 47 < ICT ≤ 49 45 < ICT ≤ 47 43 < ICT ≤ 45 ICT ≤ 43 11.7.3 ICT Trend Fast Decreasing SC D1 SR SR Norm Norm Normal Decreasing No Change Increasing SC D1 SR SR Norm Norm SC D2 D1 SR SR Norm SC D2 D2 D1 SR SR Fast Increasing SC D2 D2 D2 D1 SR 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 Stop-Compresor CTTOH4 P3 CTTOH3 P2 CTTOH2 P1 CTTOH1 Normal Control Status P1 P2 P3 Stop Compressor 11.7.4 Compressor Temperature Increases Norm D1 D2 SC Else SR SR D1 Compressor over Current Protection CCR Stop-Compresor CCROC4 HzDown2 CCROC3 HzDown1 CCROC2 Stop-Rise CCROC1 Normal 11-6 Service Manual - K DCI CONTROL SYSTEM 11.7.5 Heat Sink Over Heating Protection (NA for DCI 25 and 35) HST HST > 90 85 < HST ≤ 90 82 < HST ≤ 85 80 < HST ≤ 82 78 < HST ≤ 80 HST ≤ 78 11.7.6 HST Trend Decreasing SC D1 SR SR Norm Normal No Change SC D2 D1 SR Norm Increasing SC D2 D2 D1 SR Outdoor Coil Deicing Protection 11.7.6.1 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. Service Manual - K DCI 11-7 CONTROL SYSTEM 11.7.6.2 Deicing Protection Procedure OCT 12 0 Threshold COMP ON T1 T2 T1 max. 12 minutes DT HEAT RV COOL OFAN T3 T3 ON OFF EEVDeicerOpen EEV Any T1 = T2 = 36 seconds, T3 = 6 seconds 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 – When it is not shorted to P4 11.8.1 3 Levels Logic (used in floor/ceiling models) P2 0 1 1 0 11-8 P3 0 0 1 1 Level L0 L1 L2&3 L4 Service Manual - K DCI CONTROL SYSTEM Water Level LEVEL4 LEVEL 3 LEVEL1 ON Pump OFF ANY NLOAD 0 BLINK OPER LED NORMAL 11.8.2 1 Level Logic (used in all models except for floor/ceiling models) P2 Don`t care Don`t care P3 Level 1 Normal 0 Overflow Overflow when unit is ON Overflow Water Level Overflow when unit is OFF Normal ON OPER LED OFF BLINK ANY NLOAD NLOAD is forced to 0 0 ON PUMP OFF 8 min 11.9 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 = Open Power Shedding Function No Limit Limit NLOAD Service Manual - K DCI 11-9 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 Cooling Heating Pre-set Temperature 200C 280C 11.11 On Unit Controls and Indicators 11.11.1 Indoor Unit Controller Controls and Indicators For All Models Except for Floor/Ceiling model STAND BY INDICATOR OPERATION INDICATOR TIMER INDICATOR FILTER INDICATOR COOLING INDICATOR HEATING INDICATOR Mode SWITCH (COOL/HEAT/OFF) RESET / FILTER SWITCH 11-10 Lights up when the Air Conditioner is connected to power and ready to receive the R/C commands Lights up during operation. Blinks for 300 msec., to announce that a R/C infrared signal has been received and stored. 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 able/disable the buzzer announcer, if selected. Service Manual - K DCI CONTROL SYSTEM 11.11.2 Indoor Unit Controls and Indicators for LCD Display (Low) STBY OFF Cool SPT(1*) Heat SPT(1*) Auto SPT(1*) Fan SPT(1*) Dry SPT(1*) OFF(2*) ON(2*) ON(2*) ON(2*) ON(2*) ON(2*) OFF(2*) OFF OFF(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*) OFF User setting IFAN speed User setting IFAN speed User setting IFAN speed User setting IFAN speed User setting IFAN speed OFF ON(3*) ON(3*) OFF ON(3*) ON(3*) ON(3*) ON(3*) OFF ON(3*) (Med) OFF (High) OFF (Turbo) OFF (Auto) Backlight(red) OFF Backlight(green) OFF Service Manual - K DCI 11-11 CONTROL SYSTEM 11.11.3 Indoor Unit Controller Controls and Indicators for Floor/Ceiling Model STANDBY INDICATOR Lights up when the Air Conditioner is connected to power and is ready for operation OPERATE INDICATOR (4) 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). TIMER INDICATOR FILTER INDICATOR COOLING INDICATOR HEATING INDICATOR FAN MODE INDICATOR (4) FAN SPEED INDICATORS Lights up during Timer and Sleep operation. TEMP. SETTING INDICATORS FAN SPEED BUTTON TEMP. SETTING UP BUTTON TEMP. SETTING DOWN BUTTON MODE BUTTON POWER BUTTON RESET / FILTER BUTTON 11.11.4 1. Lights up when Air Filter needs to be cleaned. 2. Blinks during Water Over Flow in PXD models. (Cf. Sect. 7.3) 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. Lights up in Fan Mode activated by local switches. L -- Lights up when IFAN setting is Low. M -- Lights up when IFAN setting is Medium. H -- Lights up when IFAN setting is High. A -- Lights up when IFAN setting is Auto. Each one of the seven indicators indicates the following SPT: 18, 20, 22, 24, 26, 28, 30 ]oc[. The odd number temperatures are indicated by turning on the two adcent indicators. Press this button to change the speed of the IFAN. Each pressing change the speed in the sequence of: ..... L → M → H → Auto → L → ... Pressing this button increases the SPT by 1oC. Note: The Max SPT is 30oC. Pressing this button decreases the SPT by 1oC. Note: The Min SPT is 18oC. 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. Toggle the unit between OPER & STBY modes. 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 able/disable the buzzer announcer, if selected. In long pressing system enters set up mode (if in SB). Outdoor Unit Controller Indicators Unit has three LED 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. 11-12 Service Manual - K DCI CONTROL SYSTEM 11.12 Jumper Setting 11.12.1 Indoor Unit Controller 0 = Open Jumper (disconnect jumper). 1 = Close Jumper (connect jumper). Self test Jumper – J1 J1 1 0 OPERATION SELF-TEST NORMAL Compensation Jumper – J2 Model Wall Mounted Floor/Ceiling Ducted/cassette J2 (Default) 0 1 1 Compensation Activated Deactivated Activated Family selection Jumper – J3, J4 and J5 Family Reserved Reserved Reserved Wall Mounted (WNG/FLO) Floor/Ceiling (PXD/SX) Reserved Ducted (LS) Cassette (K) J5 0 0 0 0 1 1 1 1 J4 0 0 1 1 0 0 1 1 J3 0 1 0 1 0 1 0 1 FLO9 FLO12 FLO18 J8 0 0 0 J7 0 1 0 Jumper Setting J6 J5 0 0 0 0 1 0 FLO30 SX9 SX12 SX18 K9 K12 K18 LS12 0 0 0 1 0 0 1 0 0 0 1 0 0 1 0 1 1 0 0 0 0 0 0 0 IDU Model 0 1 1 1 1 1 1 1 J4 1 1 0 J3 1 1 0 0 0 0 0 1 1 1 1 1 0 0 0 1 1 1 0 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. Service Manual - K DCI 11-13 CONTROL SYSTEM Model selection Jumper – J7, J8 Model J8 J7 A 0 0 B 0 1 C 1 0 D 1 1 J9- Presence Detector/Power Shedding OPERATION Presence Detector Power Shedding J9 0 1 Jumper – J10 OPERATION WNG DCI LCD LED 11.12.2 J10 0 1 Outdoor Unit Controller JP9 JUMPER LAYOUT Reserved (PIN ODU3 (PIN 7) 9) GND (PIN 10) GND (PIN 8) ODU2 (PIN 5) ODU1 (PIN 3) ODU0 (PIN 1) GND GND GND (PIN 6) (PIN 4) (PIN 2) ODU MODEL SELECTION ODU3 OFF OFF OFF OFF OFF OFF OFF OFF ON (PIN7 & PIN8) ON (PIN7 & PIN8) ON (PIN7 & PIN8) ON (PIN7 & PIN8) ON (PIN7 & PIN8) ON (PIN7 & PIN8) ON (PIN7 & PIN8) ON (PIN7 & PIN8) ODU2 OFF OFF OFF OFF ON (PIN5 & PIN6) ON (PIN5 & PIN6) ON (PIN5 & PIN6) ON (PIN5 & PIN6) OFF OFF OFF OFF ON (PIN5 & PIN6) ON (PIN5 & PIN6) ON (PIN5 & PIN6) ON (PIN5 & PIN6) 11.13 Test Mode 11.13.1 Entering Test Mode ODU1 OFF OFF ON (PIN3 & PIN4) ON (PIN3 & PIN4) OFF OFF ON (PIN3 & PIN4) ON (PIN3 & PIN4) OFF OFF ON (PIN3 & PIN4) ON (PIN3 & PIN4) OFF OFF ON (PIN3 & PIN4) ON (PIN3 ? PIN4) ODU0 OFF ON (PIN1 & PIN2) OFF ON (PIN1 & PIN2) OFF ON (PIN1 & PIN2) OFF ON (PIN1 & PIN2) OFF ON (PIN1 & PIN2) OFF ON (PIN1 & PIN2) OFF ON (PIN1 & PIN2) OFF ON (PIN1 & PIN2) ODU Model Reserved A (DCI 25) B (DCI 35) C (DCI 50) D E (Duo) F G H I J K L M N O 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, Outdoor temperature = 35±1 Or 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 Mode = Heat, Set point = 30 11-14 Service Manual - K DCI CONTROL SYSTEM 11.13.2 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 Unit Setting Low Minimum Capacity Setting High Nominal Capacity Setting Auto Maximum Capacity Setting During test mode, protections are disabled, except for stop compressor status. 11.14 SW Parameters 11.14.1 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 ICTHSpeed ICT to start in increase speed from very low ICTTSpeed ICT to enable Turbo fan speed 25 28 30 32 40 Model Depended Parameters: Wall Mounted Models DCI 9 DCI 12 NLOAD limits as a function of selected indoor fan speed MaxNLOADIF1C 40 40 MaxNLOADIF2C 53 53 MaxNLOADIF3C 120 120 MaxNLOADIF4C 127 127 MaxNLOADIF5C 127 127 Indoor Fan speeds IFVLOWC 700 700 IFLOWC 800 800 IFMEDC 900 950 IFHIGHC 1050 1100 IFTURBOC 1150 1200 IFVLOWH 700 700 IFLOWH 800 850 IFMEDH 950 1000 IFHIGHH 1100 1150 IFTURBOH 1200 1250 Nominal Compressor Frequency NomLoadC 40 62 NomLoadH 55 67 Cassette Models Parameter Name K9 K 12 K 35S K 18 NLOAD limits as a function of selected indoor fan speed MaxNLOADIF1C 40 40 40 40 MaxNLOADIF2C 53 56 56 60 MaxNLOADIF3C 120 90 90 90 MaxNLOADIF4C 127 90 90 90 MaxNLOADIF5C 127 90 90 90 Nominal Compressor Frequency NomLoadC 40 60 56 63 Parameter name NomLoadH 55 69 73 80 Service Manual - K DCI 11-15 CONTROL SYSTEM 11.14.2 Outdoor Units SW Parameters Parameter Name DCI9 DCI12 DCI18 DCI50 DUO Compressor Parameters MinFreqC 30 33 20 20 MaxFreqC 64 80 85 97 MinFreqH 30 35 20 26 MaxFreqH 81 93 99 106 Step1Freq 60 60 60 60 Step2Freq 70 70 70 80 Step3Freq 90 90 90 90 Frequency limits as a function of outdoor air temperature MaxFreqAsOATC 50 50 64 62 MaxFreqAsOAT1H 65 75 85 85 MaxFreqAsOAT2H 60 60 60 60 Compressor Over Heating Protection CTTOH1 94 94 94 90 CTTOH2 98 98 98 95 CTTOH3 102 102 102 102 CTTOH4 105 105 105 105 Compressor Over Current Protection [A] CCR01 7.1 7.1 10 10 CCR02 7.5 7.5 10.5 10.5 CCR03 7.9 7.9 10.8 10.8 CCR04 8.3 8.3 11.2 11.2 Outdoor Fan Speed (RPM) VL 200 200 200 200 OFLOWC 550 550 600 600 OFMEDC 700 700 760 830 OFMAXC 830 830 920 920 OFLOWH 550 550 600 600 OFMEDH 700 700 830 920 OFMAXH 830 830 1000 1000 Outdoor Fan Limit Control 11-16 OFLowFreq 45 45 40 40 OFMedFreq 57 57 70 70 Service Manual - K DCI TROUBLESHOOTING 12. 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 PowerHIG When turned off, the system is still charged (400V)yle 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. 12.1 Single Split system failures and corrective actions No SYMPTOM 1 Power supply indicator (Red LED) does not light up. Unit does not respond to remote control message 2 3 4 5 6 7 PROBABLE CAUSE No power supply Remote control message not reached the indoor unit 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. Unit responds to remote control message but Operate indicator (Green LED) does not light up Indoor fan does not start (louvers are opened and Green LED does light up) Problem with display PCB Indoor fan works when unit is OFF, and indoor fan speed is not changed by remote control command. Compressor does not start PCB problem 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 Electronics control problem or protection Electronic control or power supply problem Perform diagnostics (See 12.3 below), and follow the actions described. Perform diagnostics (See 12.3 below), and follow the actions described. Compressor stops during operation and Green LED remains on Unit in heat mode and coil is still not warm. Problem with PCB or capacitor Change to cool mode and check. Service Manual - K DCI 12-1 TROUBLESHOOTING No SYMPTOM 8 Compressor is on but outdoor fan does not work Unit works in wrong mode )cool instead of heat or heat instead of cool( All components are operating properly but no cooling or no heating Compressor is over heated and unit does not generate capacity Units goes into protections and compressor is stopped with no clear reason Compressor motor is generating noise and no suction occurs Water leakage from indoor unit 9 10 11 12 13 14 15 16 12.2 Freezing of outdoor unit in heat mode and outdoor unit base is blocked with ice Unit operates with wrong fan speeds or wrong frequency PROBABLE CAUSE Problem with outdoor electronics or outdoor fan Electronics or power connection to RV CORRECTIVE ACTION Refrigerant leak Check outdoor fan motor according to the procedure in section 12.5.3 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. EEV problem Check EEV Control problem or refrigeration system problem Perform diagnostics )See 12.3 below(, and follow the actions described. Phase order to compressor is wrong Indoor unit drainage tube is blocked Check compressor phase order. Check and open drainage tube. Connect base heater. Wrong jumper settings Perform diagnostics (See 12.3 below), and check if units is operating by EEPROM parameters. 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. 12-2 Service Manual - K DCI TROUBLESHOOTING 12.3 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 LEDs. 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 d 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 12.3.1 Indoor unit Diagnostics No Problem 5 4 3 2 1 1 2 3 4 5 7 8 9 10 11 ... 17 18 19 20 21 22 24 25 26 27 28 29 30 31 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 Defrost protection Deicing Protection Outdoor Unit Protection Indoor Coil HP Protection Overflow Protection Reserved EEPROM Not Updated Bad EEPROM Bad Communication Using EEPROM data Model A Model B Model C Model D 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 1 1 1 0 0 0 0 0 1 1 0 0 1 0 0 1 1 1 0 1 0 1 1 0 1 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 0 1 1 0 0 1 0 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 Service Manual - K DCI 12-3 TROUBLESHOOTING 12.3.2 Indoor unit diagnosis and corrective actions No. 1 2 3 4 5 6 7 8 9 12-4 Fault Sensor failures of all types Communication mismatch Probable Cause Corrective Action Check sensor connections or replace sensor. Replace Indoor controller. Indoor and Outdoor controllers are with different Versions. No Communication Communication or grounding Check Indoor to Outdoor wiring is not good. wiring and grounding. Indoor electronics or motor. Checkmotorwiring,ifok, No Encoder replace motor, if still not ok, replace Indoor controller. Outdoor Unit Fault Outdoor controller problem. Switch to Outdoor diagnostics. No action, unless special System is using ROM EEPROM Not parameters and not parameters are required for Updated EEPROM parameters. unit operation. No action, unless special Bad EEPROM parameters are required for unit operation. Communication quality is low Check Indoor to Outdoor Bad Reliability. wiring and grounding. Communication No problem. System is using Using EEPROM EEPROM parameters. data Service Manual - K DCI TROUBLESHOOTING 12.3.3 No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 20 21 22 23 24 25 26 27 Outdoor Unit Diagnostics 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 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 4 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 1 1 1 3 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1 1 1 1 0 0 0 0 2 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 0 1 1 0 0 1 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 - ON, 0 - OFF Only one code is shown. Order of priorety is 1-24. Diagnostics is continuously ON as long power is on. Service Manual - K DCI 12-5 TROUBLESHOOTING 12.3.4 o. Outdoor unit diagnosis and corrective actions Fault Sensors failures of all types IPM Fault Probable Cause Electronics HW problem Bad EEPROM DC under/over Voltage Electronics HW problem AC under Voltage Indoor / Outdoor unit Communication mismatch No Communication Indoor and Outdoor controllers are with different versions Communication or grounding wiring is not good. Compressor Lock Bad Communication 12-6 Communication quality is low reliability Service Manual - K DCI Corrective Action Check sensors connections or replace sensors. Check all wiring and umper 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 TROUBLESHOOTING 12.4 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. 12.5 Simple procedures for checking the Main Parts 12.5.1 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). 12.5.2 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. 12.5.3 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 12.5.4 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). 12.5.5 Checking the Reverse Valve (RV). Running in heating mode, check the voltage between two pins of reverse valve connector, normal voltage is 220VAC. 12.5.6 Checking the electrical expansion valve (EEV). The EEV has two parts, drive part and valve. The drive part is a step motor the valve. Check the drive voltage (12VDC). When Outdoor unit is power on, EEV shall run and have click and vibration. Service Manual - K DCI 12-7 TROUBLESHOOTING 12.6 Precaution, Advise and Notice Items 12.6.1 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. Advise: Don't touch the naked lead wire and don't insert finger, conductor or anything else into the controller when power is on. 12.6.2 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. 12.6.3 • • • 12-8 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, dont pull the wire. There are sharp fringes and sting on shell. Use gloves when disassemble the A/C units. Service Manual - K DCI A.C.E Marketing FRANCE : 1 bis,Avenue du 8 Mai 1945 Saint-Quentin-en-Yvelines 78284 GUYANCOURT Cedex Tél. 33 1 39 44 78 00 Fax 33 1 39 44 11 55 www.airwell.com With a concern for a constant improvement, our products can be modified without notice. Photos non contractual. 1 bis,Avenue du 8 Mai 1945 Saint- Quentin- en-Yvelines 78284 GUYANCOURT Cedex ">

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Key features
- DC Inverter Technology
- R410A Refrigerant
- High COP
- Lego Concept
- Pre-Charged
- Networking Connectivity
- Base Heater Connection
- Low Noise
- Easy Installation
Frequently asked questions
The maximum tubing length for the K 12 DCI is 20 meters.
The maximum height difference between the indoor and outdoor units is 10 meters.
The K 12 DCI uses R410A refrigerant.