Airwell GC 9 DCI Service Manual
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Airwell GC 9 DCI Service Manual

Pnxa dci series
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REFRIGERANT
SM PNXADCI 1-A.1 GB
PNXA DCI Series
Indoor Units
PNXA 9 DCI
PNXA 12 DCI
PNXA 18 DCI
PNXA 21 DCI
PNXA 24 DCI
R410A
APRIL – 2012
Outdoor Units
GC 9 DCI
GC 12 DCI
YBD 018
YBD 022
YBD 024
HEAT PUMP

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  • Page 1 PNXA DCI Series Indoor Units Outdoor Units PNXA 9 DCI GC 9 DCI PNXA 12 DCI GC 12 DCI PNXA 18 DCI YBD 018 PNXA 21 DCI YBD 022 PNXA 24 DCI YBD 024 REFRIGERANT R410A HEAT PUMP APRIL – 2012...
  • Page 2 LIST OF EFFECTIVE PAGES LIST OF EFFECTIVE PAGES Note: Changes in the pages are indicated by a “Revision#” in the footer of each effected page (when none indicates no changes in the relevant page). All pages in the following list represent effected/ non effected pages divided by chapters.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Table of Contents INTRODUCTION ....................1-1 PRODUCT DATA SHEET ..................2-1 RATING CONDITIONS ..................3-1 OUTLINE DIMENSIONS ..................4-1 PERFORMANCE DATA & PRESSURE CURVES ..........5-1 SOUND LEVEL CHARACTERISTICS ..............6-1 ELECTRICAL DATA....................7-1 WIRING DIAGRAMS .....................8-1 REFRIGERATION DIAGRAMS ................9-1 10. ELECTRICAL CONNECTIONS................10-1 11. CONTROL SYSTEM PNXA9, PNXA12..............11-1 12.

  • Page 4: Introduction

    INTRODUCTION INTRODUCTION General The new PNX DCI INVERTER split wall mounted range has expanded, comprising the following RC (heat pump) models: PNXA 9 DCI PNXA 12 DCI PNXA 18 DCI PNXA 21 DCI PNXA 24 DCI The indoor PNX DCI units are available as LED display types, featuring esthetic design, compact dimensions, and low noise operation.

  • Page 5: Indoor Unit

    INTRODUCTION Indoor Unit The indoor unit is wall mounted, and c New design is available in LED version. Indoor Unit features: Feature PNXA 9 PNXA 12 PNXA 21 Dis lay Ionizer O tional O tional Freshe aire O tional Indoor an motor orizontal motorized louver Vertical motorized louver O tional...

  • Page 6: Outdoor Unit

    The metal sheets are protected from corrosion paint work allowing long life resistance. All outdoor units are pre-charged. For further information please refer to the Product Data Sheet, Chapter 2. Outdoor Unit Feature Feature GC 9 DCI GC 12 DCI YBD 018 YBD 022 YBD 024...
  • Page 7 Matching Table 1.11.1 R410A INDOOR UNITS OUTDOOR UNITS MODEL REFR” PNXA 9 PNXA 12 PNXA 18 PNXA 21 PNXA 24 GC 9 DCI R410A GC 12 DCI R410A YBD 018 R410A YBD 022 R410A YBD 024 R410A SM PNXADCI 1-A.1 GB...

  • Page 8: Product Data Sheet

    PRODUCT DATA SHEET PRODUCT DATA SHEET PNXA 9 DCI Model Indoor Unit PNXA 9 DCI Model Outdoor Unit GC 9 DCI R410A Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 8530(4780-12280) 10240(5120-17060) Capacity 2.5(1.4-3.6) 3.0(1.5-5.0) 0.50(0.42-1.0) 0.60(0.39-1.6) Power input 5.00...
  • Page 9 PRODUCT DATA SHEET PNXA 12 DCI Model Indoor Unit PNXA 12 DCI Model Outdoor Unit GC 12 DCI R410A Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 11940(4780-14670) 13650(5100-19790) Capacity 3.5(1.4-4.3) 4.0(1.5-5.8) 0.87(0.42-1.25) 1.00(0.39-1.75) Power input 4.02 4.00 EER (Cooling) or COP (Heating) 220-240 Power supply...
  • Page 10 PRODUCT DATA SHEET PNXA 18 DCI Model Indoor Unit PNXA 18 DCI Model Outdoor Unit YBD 018 Characteristics Units Cooling Heating Btu/hr 17060(5120-20470) 19110(4440-23200) 5.00(1.50-6.00) 5.60(1.30-6.80) 1.37(0.40-2.00) 1.46(0.35-2.00) 3.65 3.84 V/Ph/Hz Rated current Starting current 10.5 Circuit breaker rating H/M/L 1200/1050/900 H/M/L 850/760/620...
  • Page 11 PRODUCT DATA SHEET PNXA 21 DCI Model Indoor Unit PNXA 21 DCI YBD 022 Installation Method of Pipe Flared Characteristics Units Cooling Heating 21500(5460- Btu/hr 20470(6140-23200) 26950) Capacity 6.00(1.80-6.80) 6.30(1.60-7.90) Power input 1.82(0.50-2.40) 1.74(0.50-2.40) EER (Cooling) or COP(Heating) 3.30 3.62 Power supply V/Ph/Hz 220-240V/Single/50Hz...
  • Page 12 PRODUCT DATA SHEET PNXA 24 DCI Model Indoor Unit PNXA 24 DCI YBD 024 Installation Method of Pipe Flared Characteristics Units Cooling Heating Btu/hr 23188(5100~25575) 25916(5100~30000) Capacity 6.8(1.5-7.5) 7.6(1.5~8.8) Power input 2.25(0.5-2.8) 2.35(0.45~3.0) EER (Cooling) or COP(Heating) 3.01 3.23 Power supply V/Ph/Hz 220-240V/Single/50Hz Rated current...

  • Page 13: Rating Conditions

    RATING CONDITIONS Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units). Cooling: Indoor: C DB 19 C WB Outdoor: 35 C DB Heating: Indoor: C DB Outdoor: 7 C DB 6 C WB Operating Limits 3.1.1 R410A Indoor Outdoor...

  • Page 14: Outline Dimensions

    OUTLINE DIMENSIONS OUTLINE DIMENSIONS Indoor Unit: PNXA 9 / 12 DCI MOUNTING TEMPLATE CEELING TO BE USED FOR LOCATION OF INDOOR UNIT ON THE WALL INDOOR UNIT OUTLINE 810.0 MOUTING PLATE OUTLINE 30.0 167.5 167.5 93.0 TUBING WALL OPENING 93.0 (FOR REAR ROUTING) TUBING WALL OPENING (FOR REAR LEFT ROUTING)

  • Page 15: Indoor Unit: Pnxa 18

    Indoor Unit: PNXA 18 / 21 / 24 1060 Outdoor Unit: YBD 022 SM PNXADCI 1-A.1 GB...
  • Page 16 OUTLINE DIMENSIONS Outdoor Unit: YBD 024 SM PNXADCI 1-A.1 GB...

  • Page 17: Performance Data & Pressure Curves

    PERFORMANCE DATA & PRESSURE CURVES PERFORMANCE DATA PNXA 9 / GC 9 DCI 5.1.1 Cooling Capacity (kW) - Run Mode ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC] OD COIL ENTERING AIR DB DATA 22/15 24/17 27/19 29/21 32/23 TEMPERATURE 80 - 110 % of nominal...
  • Page 18 & 5.1.3 Heating Capacity (kW) - Run Mode) ID COIL ENTERING AIR DB TEMPERATURE [ºC] OD COIL ENTERING AIR DB/WB DATA TEMPERATURE [ºC] 1.37 1.17 0.97 -15/-16 0.42 0.45 0.48 1.80 1.61 1.41 -10/-12 0.47 0.50 0.53 2.13 1.93 1.74 -7/-8 0.52 0.55...
  • Page 19 PERFORMANCE DATA & PRESSURE CURVES Capacity Correction Factor Due to Tubing Length 5.2.1 Cooling 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 9 10 11 12 13 14 15 16 17 18 19 20 Tubing Length [m] 5.2.2 Heating 1.02...
  • Page 20 & PNXA 12 / GC 12 DCI 5.3.1 Cooling Capacity (kW) - Run Mode ID COIL ENTERING AIR DB/WB TEMPERATURE [ºC] OD COIL ENTERING AIR DB DATA 22/15 24/17 27/19 29/21 32/23 TEMPERATURE [ºC] 80 - 110 % of nominal -10 - 20 80 - 105 % of nominal (protection range)
  • Page 21 PERFORMANCE DATA & PRESSURE CURVES 5.3.3 Heating Capacity (kW) - Run Mode ID COIL ENTERING AIR DB TEMPERATURE [ºC] OD COIL ENTERING AIR DB/WB DATA TEMPERATURE [ºC] 1.82 1.56 1.30 -15/-16 0.70 0.75 0.80 2.40 2.14 1.88 -10/-12 0.79 0.84 0.89 2.84 2.58...
  • Page 22 & Capacity Correction Factor Due to TUbing Length 5.4.1 Cooling 1.01 1.00 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 9 10 11 12 13 14 15 16 17 18 19 20 Tubing Length [m] 5.4.2 Heating 1.02 1.00 0.98 0.96 0.94...
  • Page 23 PERFORMANCE DATA & PRESSURE CURVES PNXA 18 / YBD 018 5.5.1 Cooling Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ OD COIL ENTERING AIR DB DATA 22/15 24/17 27/19 29/21 32/23 TEMPERATURE [...
  • Page 24 & 5.5.3 Heating Capacity (kW) - Run Mode) 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ OD COIL ENTERING AIR DB/WB DATA TEMPERATURE [ 2.55 2.18 1.81 -15/-16 1.02 1.09 1.17 3.36 3.00 2.63 -10/-12 1.15 1.23...
  • Page 25 PERFORMANCE DATA & PRESSURE CURVES PNXA 21 / YBD 022 5.6.1 Cooling Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ OD COIL ENTERING AIR DB DATA 22/15 24/17 27/19 29/21 32/23 TEMPERATURE [...
  • Page 26 & 5.6.3 Heating Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ OD COIL ENTERING AIR DB/WB DATA TEMPERATURE [ 2.87 2.45 2.04 -15/-16 1.19 1.27 1.36 3.78 3.37 2.96 -10/-12 1.34 1.43...
  • Page 27 PERFORMANCE DATA & PRESSURE CURVES PNXA 24 / YBD 024 5.7.1 Cooling Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB/WB TEMPERATURE [ OD COIL 22/15 24/17 27/19 29/21 32/23 ENTERING AIR DB DATA TEMPERATURE [ 80 - 110 % of nominal...
  • Page 28 & 5.7.3 Heating Capacity (kW) - Run Mode 230[V] : Indoor Fan at High Speed. ID COIL ENTERING AIR DB TEMPERATURE [ OD COIL ENTERING AIR DB/WB DATA TEMPERATURE [ 3.46 2.96 2.46 -15/-16 1.64 1.76 1.88 4.57 4.07 3.57 -10/-12 1.86 1.97...
  • Page 29 PERFORMANCE DATA & PRESSURE CURVES Capacity Correction Factor Due to Tubing Length 5.8.1 Cooling 1.02 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.86 Tubing length(m) 5.8.2 Heating 1.02 1.00 0.98 0.96 0.94 0.92 0.90 0.88 0.86 0.84 Tubing Length(m) SM PNXADCI 1-A.1 GB 5-13...
  • Page 30 & Pressure Curves 5.9.1. Model: PNXA 18 / YBD 018 Cooling — Test Mode Suction Pressure VS.Outdoor Temp. 1100 1000 Indoor DB/WB Tem p' 2 2 / 1 5 2 4 / 1 7 2 7 / 1 9 2 9 / 2 1 3 2 / 2 3 Outdoor DB Temperature[ºC ] Discharge Pressure VS.
  • Page 31 PERFORMANCE DATA & PRESSURE CURVES 5.9.2. Heating — Test Mode Suction Pressure VS.Outdoor Temp. 1100 1000 Indoor DB Outdoor WB Temperature[ºC ] Discharge Pressure VS. Outdoor Temp. 4000 3500 Indoor DB 3000 2500 2000 1500 1000 Outdoor WB Temperature SM PNXADCI 1-A.1 GB 5-15...
  • Page 32 & — Test Mode 5.9.3 Model: PNXA 21 / YBD 022 Cooling Suction Pressure VS.Outdoor Temp. 1100 1000 Indoor DB/WB Tem p' 2 2 / 1 5 2 4 / 1 7 2 7 / 1 9 2 9 / 2 1 3 2 / 2 3 Outdoor DB Temperature[ºC ] Discharge Pressure VS.
  • Page 33 PERFORMANCE DATA & PRESSURE CURVES 5.9.4 Heating — Test Mode Suction Pressure VS.Outdoor Temp. 1100 1000 Indoor DB Outdoor WB Temperature[ºC ] Discharge Pressure VS. Outdoor Temp. 4000 3500 3000 Indoor DB 2500 2000 1500 1000 Outdoor WB Temperature [ºC ] SM PNXADCI 1-A.1 GB 5-17...
  • Page 34 & — Test Mode 5.9.5 Model: PNXA 24 / YBD 024 Cooling Suction Pressure vs. Outdoor Temperature 1000 Indoor DB/WB 22/15 24/17 27/19 29/21 32/23 Outdoor DB Temperature Discharge Pressure vs. Outdoor Temperature Indoor 3750 DB/WB 3500 3250 22/15 3000 24/17 2750 27/19...
  • Page 35 PERFORMANCE DATA & PRESSURE CURVES 5.9.6 Heating — Test Mode Suction Pressure vs. Outdoor Temperature 1200 1100 1000 Indoor DB Outdoor WB Temperature Discharge Pressure vs. Outdoor Temperature 4000 3750 3500 3250 Indoor DB 3000 2750 2500 2250 2000 1750 1500 Outdoor WB Temperature SM PNXADCI 1-A.1 GB...
  • Page 36 & —Test Mode 5.9.7 Model: PNXA 9 / GC 9 DCI Cooling Suction Pressure vs. Outdoor Temperature Indoor 1000 DB/WB 22/15 24/17 27/19 29/21 32/23 Outdoor DB Temperature Discharge Pressure vs. Outdoor Temperature Indoor 3700 DB/WB 3500 3300 22/15 3100...
  • Page 37 PERFORMANCE DATA & PRESSURE CURVES 5.9.8 Heating — Test Mode Suction Pressure vs. Outdoor Temperature 1050 Indoor DB Outdoor WB Temperature Discharge Pressure vs. Outdoor Temperature 3400 Indoor DB 3250 3100 2950 2800 2650 2500 2350 2200 2050 1900 1750 Outdoor WB Temperature SM PNXADCI 1-A.1 GB 5-21...
  • Page 38 & — Test Mode 5.9.9 Model: PNXA 12 / GC 12 DCI Cooling Suction Pressure vs. Outdoor Temperature Indoor 1000 DB/WB 22/15 24/17 27/19 29/21 32/23 Outdoor DB Temperature Discharge Pressure vs. Outdoor Temperature Indoor 3700 DB/WB 3500 3300 22/15 3100 24/17 2900...
  • Page 39 PERFORMANCE DATA & PRESSURE CURVES 5.9.10 Heating — Test Mode Suction Pressure vs. Outdoor Temperature 1050 Indoor DB Outdoor WB Temperature Discharge Pressure vs. Outdoor Temperature 3400 Indoor DB 3250 3100 2950 2800 2650 2500 2350 2200 2050 1900 1750 Outdoor WB Temperature SM PNXADCI 1-A.1 GB 5-23...

  • Page 40: Sound Level Characteristics

    SOUND LEVEL CHARACTERISTICS SOUND LEVEL CHARACTERISTICS Sound Pressure Level Unit Wall 0.8m FAN SPEED LINE Mic. Figure 1 Sound Pressure Level Spectrum (Measured as Figure 1) PNXA 9 PNXA 12 -70NC -70NC -60NC -60NC -50NC -50NC -40NC -40NC -30NC -30NC APPROXIMATE APPROXIMATE THRESHOLD OF...
  • Page 41 PNXA 24 FLO 30 NC-70 NC-60 NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE BAND CENTER FREQUENCIES, Hz SM PNXADCI 1-A.1 GB...
  • Page 42 SOUND LEVEL CHARACTERISTICS Outdoor units Unit Mic. Ground Figure 2 Sound Pressure Level Spectrum (Measured as Figure 2) GC 9 DCI Cooling GC 9 DCI Heating GC 12 DCI Cooling GC 12 DCI Heating SM PNXADCI 1-A.1 GB...
  • Page 43 YBD 018 DCI Cooling YBD 018 DCI Heating NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz YBD 022 DCI Cooling YBD 022 DCI Heating NC-70...
  • Page 44 SOUND LEVEL CHARACTERISTICS Sound Pressure Level Spectrum (Measured as Figure 2) YBD 024 Cooling YBD 024 Heating SM PNXADCI 1-A.1 GB...

  • Page 45: Electrical Data

    ELECTRICAL DATA ELECTRICAL DATA Single Phase Unit Model PNXA 9 DCI PNXA 12 DCI PNXA 18 DCI PNXA 21 DCI PNXA 24 DCI Power Supply 1 PH ,220-240VAC ,50HZ Connected to To indoor To outdoor Maximum Current 13.5A 15.7A Inrush Current \ 45 A <35A Starting Current\...

  • Page 46: Wiring Diagrams

    WIRING DIAGRAMS WIRING DIAGRAMS Indoor & Outdoor Units: PNXA 9, 12 / GC 9, 12 DCI SM PNXADCI 1-A.1 GB...
  • Page 47 WIRING DIAGRAMS Indoor Unit: PNXA 18 / PNXA 22 DCI Horizontal step motor Vertical step motor IFAN RAT ICT F resh A i r Ionizer capacitor 2uF 450V P11P15 ( red) P5(white) P8 ( Red) P6(White) P10(Red) Indoor unit controller PCB megatool Jumper PH-12...
  • Page 48 WIRING DIAGRAMS Indoor & Outdoor Units: PNXA 24 DCI / YBD 024 FUSE MSMP -PWR P201 P202 P106 P105 P104 P103 P102 P101 P503 P502 P501 P604 CN802 P603 ODU3 P602 ODU2 SELF TEST ODU1 ODU0 CN801 MODEL_SET 10 12 FLASH_PORT P401 P701...

  • Page 49: Refrigeration Diagrams

    REFRIGERATION DIAGRAMS REFRIGERATION DIAGRAMS Heat Pump Models 9.1.1 PNXA 9, 12, 18, 21 / GC 9, 12, YBD018/022 Cooling Mode 9.1.2 PNXA 9, 12, 18, 21 / GC 9, 12, YBD 018/22 Heating Mode E E V SM PNXADCI 1-A.1 GB...

  • Page 50: Heating Mode

    REFRIGERATION DIAGRAMS 9.1.3 PNXA 24 / YBD 024 OUTDOOR UNIT INDOOR UNIT Sensor Sensor Flared Valves connection Reverse valve Indoor coil Strainer Strainer Outdoor coil COOLING & DRY MODE OUTDOOR UNIT INDOOR UNIT Sensor Sensor Flared Valves connection Reverse valve Indoor coil Strainer Strainer...

  • Page 51: Electrical Connections

    ELECTRICAL CONNECTIONS ELECTRICAL CONNECTIONS 10.1 PNXA 9, 12, 18, 21 DCI ESF-PWR COOL ESF-EN HEAT RESET MODE 1. Indoor unit terminal 5. Multiple wire cable. 2. Ground wire. 6. Cable clamp. 3. Indoor coil. 7. Outdoor unit wire terminal. 4.Power cable in the indoor side. A.
  • Page 52 ELECTRICAL CONNECTIONS 10.2 PNXA 24 DCI 1. Indoor unit terminal 5. Cable clamp. 2. Ground wire. 6. Outdoor unit wire terminal. 3. Indoor coil. 7. Power cable in the outdoor side 4. Multiple wire cable. (only for outdoor unit power supply) A.
  • Page 53 CONTROL SYSTEM CONTROL SYSTEM PNXA 9 / 12 11.1 General Functions and Operating Rules The DCI software is fully parametric. All the model dependent parameters are shown in Blue color and with Italic style [parameter]. The parameters values are given in the last section of this control logic chapter of the service manual.
  • Page 54 CONTROL SYSTEM Target frequency limits as a function of outdoor air temperature )OAT(: OAT Range Cool mode limits Heat mode limits < 6 MaxFreqAsOATC OAT < 15 MaxFreqAsOAT1H OAT < 24 MaxFreqAsOAT2H No limit 11.1.4 Frequency Changes Control Frequency change rate is 1 Hz/sec. 11.1.5 Compressor Starting Control Frequency...
  • Page 55 CONTROL SYSTEM 11.1.8 Heating Element Control Heating element can be started if LOAD > * Maxi mumNLOAD AND Indoor Coil temperature <45. The heating element will be stopped when LOAD < MaximumNLOAD OR if Indoor Coil Temperature > 11.1.9 Outdoor Fan Control 7 outdoor fan speeds are determined for each model.
  • Page 56 CONTROL SYSTEM 11.1.13 Electro Static Filter )ESF( Control ESF is on when ESF switch is on, Safety switch is pressed, unit is on, AND indoor fan is on. 11.1.14 Base Heater Control When OAT is connected, Base Heater will be on when unit is in heating and OAT<2 When OAT is disconnected, Base Heater will be on when unit is in heating.
  • Page 57 CONTROL SYSTEM 11.4.2 Indoor Fan Control in Heat Mode Indoor fan speed depends on the indoor coil temperature: ICTST ICTL ICTH 11.5 Auto Cool/Heat Mode When in auto cool heat mode unit will automatically select between cool and heat mode according to the difference between actual room temperature and user set point temperature ) T(.
  • Page 58 CONTROL SYSTEM 11.7.2 Indoor Coil over Heating Protection ICT Trend Fast Decreasing No Change Increasing Fast Decreasing Increasing > 53 <ICT 49 < ICT 47 < ICT 45 < ICT Norm Norm 43 < ICT Norm Norm Norm Normal 11.7.3 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.
  • Page 59 CONTROL SYSTEM 11.7.5 Heat Sink Over Heating Protection (NA for DCI 25 and 35) (NA for GC 9 and GC 12 DCI) HST Trend Decreasing No Change Increasing > 90 85 < HST 82 < HST 80 < HST 78 < HST Norm Norm Normal...
  • Page 60 CONTROL SYSTEM 11.7.6.2 Deicing Protection Procedure Threshold COMP max. 12 minutes HEAT COOL OFAN EEVDeicerOpen 36 seconds, T3 = 6 seco 11.8 Condensate Water Over Flow Protection Each of the pins P1, P2, P3 can have two options: 1 – When it is shorted with P4 0 –...
  • Page 61 CONTROL SYSTEM Water Level LEVEL4 LEVEL 3 LEVEL1 Pump NLOAD BLINK OPER LED NORMAL 11.8.2 1 Level Logic (used in all models except for floor/ceiling models) Level Don`t Normal care Don`t Overflow care Overflow when Overflow when unit is ON unit is OFF Overflow Water Level...
  • Page 62 CONTROL SYSTEM 11.10 Operating the Unit from the Mode Button Forced operation allows to start, stop and operate in Cooling or Heating, in pre-set temperature according to the following table: Forced operation Mode Pre-set Temperature Cooling 11.11 On Unit Controls and Indicators 11.11.1 Indoor Unit Controller Controls and Indicators For All Models Except for Floor/Ceiling model...
  • Page 63 CONTROL SYSTEM 11.11.2 Indoor Unit Controls and Indicators for LCD Display STBY Cool Heat Auto SPT(1*) SPT(1*) OFF(2*) ON(2*) ON(2*) ON(2*) ON(2*) ON(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*) OFF(2*) (Low) User User User User User (Med) setting setting setting setting setting IFAN IFAN...
  • Page 64 CONTROL SYSTEM 11.11.3 Indoor Unit Controller Controls and Indicators for Floor/Ceiling Model STANDBY Lights up when the Air Conditioner is connected to power and is ready INDICATOR for operation OPERATE 1. Lights up during operation. INDICATOR 2. Blinks for 300 msec., to announce that a R/C infrared signal has been received and stored.
  • Page 65 CONTROL SYSTEM 11.12 Jumper Setting 11.1 . Indoor Unit Controller 0 = Open Jumper (disconnect jumper). 1 = Close Jumper (connect jumper). Self test Jumper – J1 OPERATION SELF-TEST NORMAL Compensation Jumper – J2 Model J2 (Default) Compensation Wall Mounted Activated Floor/Ceiling Deactivated...
  • Page 66 CONTROL SYSTEM Model selection Jumper – J7, J8 Model J9- Presence Detector/Power Shedding OPERATION Presence Detector Power Shedding Jumper – J10 OPERATION WNG DCI LCD 11.12.2 Outdoor Unit Controller JP9 JUMPER LAYOUT Reserved (PIN ODU3 (PIN 7) ODU2 (PIN 5) ODU1 (PIN 3) ODU0...
  • Page 67 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 i n i y t i y t i y t i During test mode, protections are disabled, except for stop compressor status.
  • Page 68 CONTROL SYSTEM 11.14.2 Outdoor Units SW Parameters Parameter Name DCI 9 DCI 12 DCI 18 DCI 50 DUO Compressor Parameters MinFreqC MaxFreqC MinFreqH MaxFreqH Step1Freq Step2Freq Step3Freq Frequency limits as a function of outdoor air temperature MaxFreqAsOATC MaxFreqAsOAT1H MaxFreqAsOAT2H Compressor Over Heating Protection CTTOH1 CTTOH2 CTTOH3...

  • Page 69: Electronic Control

    CONTROL SYSTEM CONTROL SYSTEM FOR PNXA 18/21/24 12.1 Electronic Control 12.1.1 General Functions and Operating 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.
  • Page 70 CONTROL SYSTEM LoadDeadZoneC LoadDeadZoneH LoadDeadZone During running time (unlike starting) Compressor can operate only in its allowed frequency range. The lower allowed frequency is extracted from the following: Mode MinFreq MinFreqA Cool MinFreqC MinFreqCA HPAtMinFreqC HPAtMinFreqCA Heat MinFreqH MinFreqHA HPAtMinFreqH HPAtMinFreqHA Notes: 1.
  • Page 71 CONTROL SYSTEM 12.1.3.5 Minimum On and Off Time 3 minutes. 12.1.4 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.
  • Page 72 CONTROL SYSTEM ‘D’: NightPercent (Night Mode Speed) ‘E’: - End of Deicer - When Compressor changes to off (Ventilation) - OMT and OCT fault in heat mode ‘F’: - Test Mode 12.1.6.3 OFAN Operation With keeping the OFAN general rules above in the highest priority, the operation of the OFAN will be operating as the following: Cooling heating...

  • Page 73: Fan Mode

    CONTROL SYSTEM +Target_CTT_Gamma_H*Actual Compressor Frequency +Target_CTT_Delta_H 12.1.8 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. 12.2 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 adjusted automatically according to the difference between actual room temperature and user set point temperature.

  • Page 74: Dry Mode

    CONTROL SYSTEM 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 <...
  • Page 75 CONTROL SYSTEM Stop-Compresor CTTOH4 CTTOH3 CTTOH2 CTTOH1 Normal Control Status Compressor Temperature Else Increases Norm Stop Compressor 12.7.4 Outdoor Coil Overheating Protection -OMT <-1 >1 ≥ HPC5 HPC4 ≤ OMT < HPC5 HPC3 ≤ OMT < HPC4 HPC2 ≤ OMT <...
  • Page 76 CONTROL SYSTEM is the current reading of HST and HST is the last reading of HST. -HST <-1 >1 > HSTOH5 HSTOH4 ≤ HST < HSTOH5 HSTOH3 ≤ HST < HSTOH4 HSTOH2 ≤ HST < HSTOH3 HSTOH1 ≤ HST < HSTOH2 Norm Norm Norm...
  • Page 77 CONTROL SYSTEM DST is defined as: When OAT>0 or OAT is invalid; then DST=8 When OAT≤0; then DST= round down (-DeicerCoef * OAT) + 8 Deicing interval time when compressor is first started in heat mode is 30 minutes. Deicing interval time is changed (increased/ decreased in 10 minutes steps) as a function of deicing time.
  • Page 78 CONTROL SYSTEM 12.7.9.1 3 Levels Logic (used in floor/ceiling models) Level L2&3 Water Level LEVEL4 LEVEL2&3 LEVEL1 Pump NLOAD BLINK OPER LED NORMAL 12.7.9.2 1 Level Logic (used in all models except for floor/ceiling models) Level Don’t Normal care Don’t Overflow care Overflow when...
  • Page 79 CONTROL SYSTEM 12.7.10 Exceeding operation conditions Exceeding limits state Normal state (default) Outdoor conditions EnableExceedCond Outdoor mode Indoor Mode Indoor Indoor 0 (or OAT request Hydro Non Hydro faulty) (Family 31) (Family is not 31) Cooling A=47 A=47 Idle Cooling Cool Cooling B=-11...
  • Page 80 CONTROL SYSTEM HEATING INDICATOR 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 Mode SWITCH order : SB → Cool Mode → Heat Mode → SB → … (COOL/HEAT/OFF) In long pressing system enters diagnostic mode.
  • Page 81 CONTROL SYSTEM Go down one level Selection Select in the menu or FAN mode command button select an option. Escaping Go up one level in Escape Oper/STBY command the menu button Note: the buttons above are selected according to RC8 design (refer to RC8 specifications) for the technician convenient use.
  • Page 82 CONTROL SYSTEM Diagnostics (dia) Set Up (Stp) Status (Stt) Notes: 1. The default presentation will be alternation among: o the mode of the unit (Cl/Ht/Sb) shown for 2 sec. o ID + the detected IDUs number shown for 2 sec. o Active fault (among ODU or IDUs), each to be shown for 2 sec.

  • Page 83: Jumper Settings

    CONTROL SYSTEM 11. For technician mode presentation, whenever the system exit technician mode due any of the faults listed under Sect., the HMI will show the fault in the same way to Diagnostics sub menu. Fault Code: Problem OCT is shorted/disconnected CTT is shorted/disconnected HST is shorted/disconnected OAT is shorted/disconnected...
  • Page 84 CONTROL SYSTEM Self test Jumper – J1 OPERATION SELF-TEST NORMAL Compensation Jumper – J2 Model J2 (Default) Compensation WNG/WNG18/WNG30/WSA Activated PXD/AC/NPXD Deactivated LS/K/KS/AS/AD/DNG/KN Activated Family selection Jumper – J3, J4 ,J5and J6 Family WNG18 WNG30 Delta 50 NPXD Reserved Note: 1. Delta 50 is used for Delta Product. This family occupies family No. 10 on the communication level.
  • Page 85 CONTROL SYSTEM Default SW jumpers according to the family (used in the ROM) Property ‘Thermostatic Stop- Heat’ (J2) ‘Heat to STBY’ (J3) Water Level Protection (J4) J1 – EEPROM/ROM setting When J1 is 1, IDU will use model/family/general parameters from EEPROM. If EEPROM is invalid, IDU will ignore J1 and use/copy the ROM pointed by the selected jumpers (will also set an according fault).

  • Page 86: Test Mode

    CONTROL SYSTEM 12.13 Test Mode 12.13.1 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 o Mode = Heat, Set point = 30, Room temperature = 20±1, Outdoor temperature = 7±1 Manually when entering diagnostics with the following settings:...

  • Page 87: Troubleshooting

    TROUBLESHOOTING TROUBLESHOOTING 13.1 ELECTRICAL & CONTROL 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.
  • Page 88 TROUBLESHOOTING SYMPTOM PROBABLE CORRECTIVE ACTION CAUSE Compressor is on but Problem with Check outdoor fan motor according outdoor fan does not outdoor electronics to the procedure in section 13.2.3 work or outdoor fan below, if not OK replace controller Unit works in wrong Electronics or Check RV power connections, if OK, mode (cool instead of...
  • Page 89 TROUBLESHOOTING 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.
  • Page 90 TROUBLESHOOTING Problem Model A Model B Model C Model D 13.1.3.2 Indoor unit diagnosis and corrective actions Probable Cause Corrective Action Fault Check sensor connections or Sensor failures of replace sensor all types Indoor and Outdoor Replace Indoor controller Communication controllers are with different mismatch versions...
  • Page 91 TROUBLESHOOTING Problem IPM Fault Bad EEPROM DC under voltage DC over voltage AC under voltage Indoor / Outdoor unit 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 For YBD 018/22/24...
  • Page 92 TROUBLESHOOTING Bad Communication Missing ODU configuration Undefined ODU Model Outdoor/Indoor Coil Overheating Operation conditions are exceeded 13.1.3.4 Outdoor unit diagnosis and corrective actions Probable Cause Corrective Action Fault Sensors failures of all Check sensors types connections or replace sensors. IPM Fault Electronics HW Check all wiring and problem...
  • Page 93 TROUBLESHOOTING 13.2.1 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). 13.2.2 Checking Power Input.
  • Page 94 EXPLODED VIEW & SPARE PART LIST EXPLODED VIEW & SPARE PART LIST 14.1 Exploded view of indoor unit: PNXA 9/12 DCI SM PNXADCI 1-A.1 GB 14-1...
  • Page 95 EXPLODED VIEW & SPARE PART LIST 14.2 Spare part list of indoor Unit: PNXA 9/12 DCI Description Quantity 465800009 Grill A Assy./ LEX7/9/12/14 for Airwell 465800016 Grill A Assy./ LEX7/9/12/14 for Electra 4518655 Air Filter 4519132 Active Carbon Static Fiber filter...
  • Page 96 EXPLODED VIEW & SPARE PART LIST 14.3 Exploded view of indoor unit: PNXA 18/21/24 DCI SM PNXADCI 1-A.1 GB 14-3...
  • Page 97 EXPLODED VIEW & SPARE PART LIST 14.4 Spare part list of indoor Unit: PNXA 18/21 DCI Name Qua. 465100078 Grill A/Lex-18 (RAL9003AW) 452919800 Filter 470500012 Nanometer Photocatalysis Deodorant Filter Lex18/24 470500015 Biological Sterilization Filter Lex18/24 Front Frame Assy./Glossy/LEX 50 DCI（VIESSMANN） 465720388 Screw Cover/Glossy/LEX 50 DCI（VIESSMANN）...
  • Page 98 EXPLODED VIEW & SPARE PART LIST 14.5 Spare part list of indoor Unit: PNXA 24 DCI Name Qua. 465100078 Grill A/Lex-18 (RAL9003AW) 452919800 Filter 470500012 Nanometer Photocatalysis Deodorant Filter Lex18/24 470500015 Biological Sterilization Filter Lex18/24 Front Frame Assy./Glossy/LEX 50 DCI（VIESSMANN） 465720388 Screw Cover/Glossy/LEX 50 DCI（VIESSMANN）...
  • Page 99 EXPLODED VIEW & SPARE PART LIST 14.6 Exploded view of outdoor Unit: GC 9/12 DCI SM PNXADCI 1-A.1 GB 14-6...
  • Page 100 EXPLODED VIEW & SPARE PART LIST 14.7 Spare part list of outdoor Unit: GC 9/12 DCI Name Qua. 433218 Front Panel A 4526340 Air inlet ring-420 464860054 Painting Insulation Plate Assy/ONG 4526476 Axial fan OD=401 4527092R DC MOTOR for DCI 25/35 433215 Motor Support 4523060...
  • Page 101 EXPLODED VIEW & SPARE PART LIST 14.8 Exploded view of outdoor Unit: YBD018 SM PNXADCI 1-A.1 GB 14-8...
  • Page 102 EXPLODED VIEW & SPARE PART LIST 14.9 Spare part list of outdoor Unit: YBD018 Name Qua. 433218 Front Panel A 4526340 Air inlet ring-420 433223 Painting Insulation Plate 464250118 Fireproofing plate/ONG3 DIC 4519251 Axial Fan OD=400 466100034R Metal Motor 4527203 Motor Support 464600094 Base Painting Assy.
  • Page 103 EXPLODED VIEW & SPARE PART LIST 14.10 Exploded view of outdoor Unit: YBD022 SM PNXADCI 1-A.1 GB 14-10...
  • Page 104 EXPLODED VIEW & SPARE PART LIST 14.11 Spare part list of outdoor Unit: YBD022 Name Qua. 4517144 Fan Cover PP+UV/Grill A 452795700 Painted Left Cabinet Assy. 4516786 Painted Right Cabinet Assy. 4523141 Hexagon Locked Nut M10 4526841 Cusion for Fan 4526510 FAN D=460mm (3 blade) 466100048R...
  • Page 105 EXPLODED VIEW & SPARE PART LIST 14.12 Exploded view of outdoor Unit: YBD024 SM PNXADCI 1-A.1 GB 14-12...
  • Page 106 EXPLODED VIEW & SPARE PART LIST 14.13 Spare part list of indoor Unit: YBD024 Item Description Quan. 465100000 Grill/ DCI Trio 4523652 PAINTED LEFT CABINET ASSY 4523758 Nut M8 left 452960400 Outdoor Fan 461600055 4-Way Valve Assy. 461030003 4-way Valve Coil 4526522 FOUR-WAY VALVE R410A 466110008R...

  • Page 107: Tubing Connections

    TUBING CONNECTIONS TUBING CONNECTIONS 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. In case the indoor unit is installed above the outdoor, no trap is required.

  • Page 108: Appendix A

    APPENDIX A APPENDIX A INSTALLATION AND OPERATION MANUALS SM PNXADCI 1-A.1 GB 16-1...

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