Airwell VRF Series Engineering Manual
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Airwell VRF Series Engineering Manual

Air-conditioning system
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Engineering Manual
VRF Air-Conditioning System
VRF-Outdoor Unit: YAV
Cassette: CKV / KXV
Floor-Ceiling: SXV
Ducted:
DLV / DSV
Wall-Mounted: PNV
11,2 to 14 kW
12,5 to 16 kW

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Summary of Contents for Airwell VRF Series

  • Page 1 Engineering Manual VRF Air-Conditioning System VRF-Outdoor Unit: YAV Cassette: CKV / KXV Floor-Ceiling: SXV Ducted: DLV / DSV Wall-Mounted: PNV 11,2 to 14 kW 12,5 to 16 kW...

  • Page 2: Table Of Contents

    Engineering manual ABBREVIATION EXPLANATION .............................4 PART I PRODUCT OUTLINE .............................7 1 VRF SYSTEM OUTLINE ................................8 2 PRODUCT MODEL INTRODUCTION ............................9 3 VRF SYSTEM PROJECT DESIGN ............................13 PART II VRF SYSTEM WORKING AND CONTROL ELEMENTS INTRODUCTION ........34 1 REFRIGERATION SYSTEM OUTLINE ..........................35 2 INDOOR UNIT’S FAN CONTROL............................40 3 OUTDOOR UNIT’S FAN CONTROL.............................43 4 COMPRESSOR CONTROL..............................46...
  • Page 3 Engineering manual 1 R410A SATURATION TABLE(GAUGE PRESSURE) ......................365 2 PC MONITOR OPERATION INSTRUCTION........................366...

  • Page 4: Abbreviation Explanation

    Engineering manual Abbreviation explanation Abbreviation Explanation Air-Conditioner Alternating Current. ATR/ATP Acceptance Test Results / Procedure Building Management System Compressor Current Compressor Driver Board Compressor Discharge Temperature CDT1 Inverter comp. Discharge Temperature CDT2 Fixed speed comp. Discharge Temperature COMP Compressor Calculated Room Temperature Compressor Suction Temperature CST1 Inverter Comp.
  • Page 5 Engineering manual High Pressure Sensor High Pressure Valve Heat Recovery System Heat Recovery Ventilation Hard Ware Integrated Circuit ICIT Indoor Coil Inlet Temperature ICMT Indoor Coil Medium Temperature ICOT Indoor Coil Outlet Temperature Indoor Unit IFAN Indoor Fan I-FEEL I-Feel function Ionizer Infra-Red Infra Red for Ducted...
  • Page 6 Engineering manual OFAN Outdoor Fan Optimization function Oil separator Physical Address Power Board Private Computer Power Supply PTEST Production line test Remote Controller Room Air Temperature Reverse Cycle (Heat Pump) Remote Control Temperature Rounds per second (mechanical frequency) Real Time Clock Reverse Valve S_ Seg Seven Segment Display...

  • Page 7: Part I Product Outline

    Engineering manual Part I Product Outline 1 VRF SYSTEM OUTLINE ................................8 2 PRODUCT MODEL INTRODUCTION..........................9 3 VRF SYSTEM PROJECT DESIGN............................13...

  • Page 8: Vrf System Outline

    Airwell group which apply itself to the conditioner career for 60 years.

  • Page 9: Product Model Introduction

    Engineering manual 2 Product model introduction 2.1 Indoor unit model Indoor unit Indoor Unit Capacity (KBTU/h) Dimensions Type Model Name Model 009 012 015 018 021 024 030 [W×H×D] 578×578×219 ● ● ● 578×578×270 ● ● 840×840×230 ● ● 840×840×300 ●...
  • Page 10 Engineering manual 2.2 Outdoor unit model Model name YAV112 YAV140 KBTU/h 38.2 47.8 Dimensions[W×H×D] 950×1277×340 Number of max connectable indoor units Max. allowable indoor/outdoor capacity ratio 51-130% Figuration...
  • Page 11 Engineering manual 2.3 Controller components Individual control Operation system Centralized control systems Receiver systems Operation with Indoor unit remote various function Simple edition For RC use in Needs controller from center of LWC ducted unit station External appearance Model name RC3i-1 RC7i-1 LWCS...
  • Page 12 Engineering manual 2.4 Product naming introduction Indoor unit Unit’s capacity(KBTU/h) Variable PN: Wall mounted type; CK: Slim cassette type; KX: Cassette type; ‘ DL: Slim ducted type; DS: Ducted type; SX: Floor and ceiling type Outdoor unit 10 times of unit’s capacity(KW) Variable Front discharging multi variable air conditioning...

  • Page 13: Vrf System Project Design

    Engineering manual 3 VRF system project design 3.1 System working temperature range The MINI VRF system can work at very low temperatures in cool and heat modes. The work range is just as the table below: Indoor Outdoor Mode Range DB [℃] WB [℃] DB [℃]...
  • Page 14 Engineering manual 3.2 Design flow Below is the flow of cooperation between the VRF conditioner system design and construction project : Project cooperation meeting Structure project VRF conditioner system design Confirm the outdoor unit installed Calculate the cooling and heating capacity location and indoor unit installed room requirement for every room Installing iron bracket and supply the...
  • Page 15 Engineering manual 3.3 Indoor units cooling capacity correction(based on indoor WB temp. and outdoor DB temp.) Chart 3-1 Chart 3-2...
  • Page 16 Engineering manual 3.4 Indoor units heating capacity correction(based on indoor DB temp and outdoor WB temp.) Chart 3-3 Chart 3-4...
  • Page 17 Engineering manual 3.5 Correction factor for outdoor unit defrosting Outdoor unit heating capacity correction coefficient during defrosting: Outdoor intake air temp. ( ℃ WB RH85%) Correction 0.97 0.97 0.96 0.94 0.91 0.89 0.87 0.87 0.87 0.88 0.89 0.91 0.92 0.95 coefficient Table 3-2 To calculate the heating capacity with consideration for frosting /defrosting operation, multiply the heating capacity...
  • Page 18 Engineering manual 3.6 Correction factor according to piping equivalent length Cooling mode: Chart 3-5 Heating mode: Chart 3-6...
  • Page 19 Engineering manual 3.7 Correction factor for indoor units capacity/outdoor capacity ratio Chart 3-7 Chart 3-8...
  • Page 20 Engineering manual 3.8 Piping length and elevation limitation Chart 3-9 Ranges that apply to refrigerant tubing lengths and differences in installation heights Items Marks Contents Length(m) Actual tubing length ≤150 Max. tubing length Equivalent tubing length ≤175 Allowable Difference between the max. length and the min. length ≤40 △L(L2-L3) tubing...
  • Page 21 Engineering manual 3.9 Tubing size selection Main tubing size Below Capacity(kW) Over Capacity(kW) Main tubing <32 ≥32 ≥66 size(LA) ODU model 11.2 11.2 11.2 Gas tubing(mm) Φ15.88 Φ15.88 Φ19.05 Φ19.05 Φ19.05 Φ22.23 Φ19.05 Φ19.05 Φ22.23 Liquid Φ9.52 Φ9.52 Φ12.70 Tubing(mm) Below 20.2 Capacity(kW)
  • Page 22 Engineering manual Main tubing size after distribution Below Capacity(kW) 6(2.2HP) 20.2(7.2HP) Over Capacity(kW) 6(2.2HP) Gas tubing(mm) Φ12.7 Φ15.88 Liquid Tubing(mm) Φ9.52 Table 3-5 Main tubing size after distribution (LB, LC…) Indoor unit tubing connection Indoor unit type Gas tubing(mm) Φ12.7 Φ15.88 Liquid tubing(mm) Φ6.35...
  • Page 23 Engineering manual 3.10 Piping connector and refrigerant distribution VRF system use the special T-joints to connect the pipe and distribute the refrigerant ,it helps to make the piping system more simple and installation more convenient, so it can save copper pipe’s use and installation time. 3.10.1 T-joints dimension diagram There are two model of T-joints: Model A ( Chart 3-10) and Model B (Chart 3-11) Chart 3-10 Model A...
  • Page 24 Engineering manual Chart 3-11 Model B 3.10.2 T-joints installation notice In order to prevent accumulation of refrigerant oil in stopped units, if the main tubing length should be at an angle  that is greater than horizontal. If the main tubing is vertical, provide a raised starting portion of each branch. Chart 3-12 If there are height differences between indoor units or if branch rubbing that follows a distribution joint is connected ...
  • Page 25 Engineering manual 3.11 Refrigerant additional charge (based on piping length and size) 3.11.1 Calculate the system additional charge Refrigerant Charge Amount at shipment (for outdoor unit)  YAV112 YAV140 Heat Pump Unit (kg) Table 3-7 According the refrigerant pipe length and dimension, we need charge additional refrigerant. ...
  • Page 26 Engineering manual The PCB Display CTEST, not blinking Enter CTEST The system running for 20 In this process, if you long minutes press for 5s, the system will exit CTEST The MCU judge the result and display the result on the PCB If the PCB display AXXXX,it If the result is PASS, ovcHA or cksys...
  • Page 27 Engineering manual 3.12 Example of VRF system project design We choose a house with two bedrooms, one dining-room and one drawing room in uptown to introduce how to design our VRF system project. The size and configuration of this house is as the picture below: Kitchen Bedroom 2 Drawing room...
  • Page 28 Engineering manual 3.12.1 The project actual design flow A. Discuss with the owner of the house or structure project principal to confirm where the outdoor unit installs and which room need install indoor units. The result after this step: The room need to install Dining-room and drawing Bedroom 1 Bedroom 2...
  • Page 29 Engineering manual C. According the capacity correction curve, ensure whether the indoor units satisfy the requirement of the room. Suppose the air conditioner is mostly used for cooling, so we need to correct the indoor units capacity as below: The room need to install Dining-room and drawing Bedroom 1 Bedroom 2...
  • Page 30 Engineering manual E. Define the final system diagram, controller wiring diagram and refrigerant pipe system According the house size and conditioner installation location, finally confirm the piping system as the pictures  below, the tube size is confirmed based on the regular refer to section 3.9: Kitchen Bedroom 2 Drawing room...
  • Page 31 Engineering manual PNV007 CKV018 PNV007 YAV112 Dimension(Gas tube/ Liquid tube) (inch) Length(m) Main tube :AB Gas tube:5/8 inch; Liquid tube: 3/8 inch Gas tube:5/8 inch; Liquid tube: 3/8 inch Gas tube:1/2 inch; Liquid tube: 1/4 inch Gas tube:1/2 inch; Liquid tube: 1/4 inch Gas tube:1/2 inch;...
  • Page 32 Engineering manual The communication wires are installed with the tube system, the controller system diagram is as below, one  LWC(local wired controller) and two IR-RC controller is applied in this system: Main bus YAV112 Local bus F. Install indoor units, outdoor units, refrigerant pipe condensing water pipe, power source wire, communication wire and LWC according the outdoor unit and indoor unit installation manuals.
  • Page 33 Engineering manual 3.12.2 VRF selection software introduction To make the VRF system project design more convenient and easy, our software team design a selection software. This software can finish the outdoor and indoor units’ selection automatically. Refer to correlative manual to know how to use this software.

  • Page 34: Part Ii Vrf System Working And Control Elements Introduction

    Engineering manual Part II VRF system working and control elements introduction 1 REFRIGERATION SYSTEM OUTLINE ...........................35 2 INDOOR UNIT’S FAN CONTROL.............................40 3 OUTDOOR UNIT’S FAN CONTROL..........................43 4 COMPRESSOR CONTROL..............................46 5 EEV(ELECTRONIC EXPANSION VALVE) CONTROL ....................52 6 SYSTEM FAULTS AND PROTECTIONS ...........................55...

  • Page 35: Refrigeration System Outline

    Engineering manual 1 Refrigeration system outline 1.1 Refrigeration system diagram Outdoor unit refrigeration system diagram  Cooling Chart 1-1 (a)
  • Page 36 Engineering manual Heating Chart 1-1 (b)
  • Page 37 Engineering manual Components Full name Function Inverter compressor The variable speed type compressor Electronic Expansion Valve Adjusting the refrigeration flow When the low pressure gets lower, the valve is open by the low pressure safety device. The valve is open in order Gas bypass solenoid valve to reduce the load at the start of compressor and when the system stops and then keep the balance of low pressure.
  • Page 38 Engineering manual Indoor unit refrigeration system diagram  Chart 1-2 Components Full name Function Electronic Expansion Valve Adjusting the refrigeration flow Restrictor To reduce the refrigeration flow fluctuation Strainer To filter the impurity in system refrigeration ICIT Indoor coil inlet temperature The data for EEV control ICMT Indoor coil middle temperature...
  • Page 39 Engineering manual 1.2 Protection devices’ parameters in VRF system Outdoor units Project Name YAV112 YAV140 Compressor model ANB33 ANB33 Inverter Control Equipment MBF28B1F06B MBF28B1F06B Crankcase Heater 220VAC/32.5W 220VAC/32.5W Compressor Input Current protection 31.5A 31.5A Module Heat protection 95℃ 95℃ Fan motor 140W 140W Fan motor temperature...

  • Page 40: Indoor Unit's Fan Control

    Engineering manual 2 Indoor unit’s Fan control 2.1 Indoor DC Fan Motor Control Rules 2.1.1 Target Speed Setting In SW engineering logic, 3 speeds are defined for each operation mode: Low (LOW), Medium (MED) and High  (HIGH). Speed compensation for different speeds depends on unit installation height. Installation height depends on dip ...
  • Page 41 Engineering manual 2.2 IFAN control in different mode 2.2.1 OFF mode IFAN is OFF. 2.2.2 Cool Mode In high/medium/low user setting – follow user setting. In auto fan mode, the fan speed will be set according to IDU load. 2.2.3 Heat Mode User preferred speed is set according to the following rules: ...
  • Page 42 Engineering manual 2.2.5 Fan Mode In high/medium/low user setting – follow user setting. In auto fan mode, the fan speed will be set according to the following graph: IFAN Speed High Speed Medial Speed Low Speed ΔT(℃) Chart 2-2...

  • Page 43: Outdoor Unit's Fan Control

    Engineering manual 3 Outdoor unit’s Fan control 3.1 Normal operation The OFAN speed is controlled according to the following objectives: Mode OFAN Goal Note Keep the condensation temperature to the Avoid exceeding the pressure ratio Cool Mode appropriate value Avoid too noise Avoid exceeding pressure ratio.
  • Page 44 Engineering manual For heating mode:  Of an Speed( RPM ) - heat i ng 1000 l oad=10% l oad=50% l oad=100% - 10 OAT( ℃ Chart 3-2 3.2 Behavior when OFAN is fault 3.2.1 Outputs Handling OFAN, Compressor, Reverse valve and IDU EEV will be turned OFF. Hot gas bypass valve will be turned on.
  • Page 45 Engineering manual 3.4 Forced on condition After COMP is OFF, the OFAN will run 1 minute at 700 rpm. 3.5 Silence mode Upon receiving Silence mode, the max speed of the OFAN will be limited to 800rpm only in Cool. It will be back to its normal operation when receiving the mode is cleared.

  • Page 46: Compressor Control

    Engineering manual 4 Compressor control 4.1 Compressor Off If any condition below is met, Compressor will be off at once: All IDU is Off  Protection is in SC (Stop-compressor) level  Forced shut off dry contact is shorted  4.2 Compressor Target speed setting Target speed (by load) setting Comp...
  • Page 47 Engineering manual Cooling ActualLPT TargetLPT ActualCompSpd 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 By load By load By load time(1s) By Pressure By Pressure By Pressure Chart 4-2 4.2.1 Target speed (by load) setting For cooling mode: ...
  • Page 48 Engineering manual For heating mode:  The compressor speed is based on the IDU load and the outdoor temperature. Com p. Speed( RPS) - Cool i ng O AT= - 5℃ O AT= 35℃ O AT= 46℃ Tot al I DU Load( Kw ) Chart 4-4 4.2.2 Target Speed (by pressure) setting For cooling mode:...
  • Page 49 Engineering manual For heating mode:  The compress speed is corrected by the condensing temperature to maintain Tc between Min Tc and max Tc. The max Tc is 55℃. The min Tc is 41℃.(Tc means condensing temperature) Max Tc Min Tc Time Chart 4-6 4.2.3 Correction by protection...
  • Page 50 Engineering manual Delta controlled input Calculated every ProtectionTimeConst Controlled Input Protection Level Control Table (Normal, SR,D1,D2,SC) Control Range (Always Calculated) Chart 4-7 HST: Heat Sink Temperature protection Controlled Delta Controlled input Input range ≤-DerB (-DerB, -DerA] (-DerA,0] (0, DerA] (DerA ,DerB] >...
  • Page 51 Engineering manual Compressor Discharge temperature protection  This protection comes to prevent the over heating of the compressor. The detection of the over heating is done according the discharge temperature measured by the CDT sensor. Heat Sink over heating protection ...

  • Page 52: Eev(Electronic Expansion Valve) Control

    Engineering manual 5 EEV(Electronic Expansion valve) control 5.1 EEV general rules 5.1.1 Operation Range The EEV operation range is defined according to the operation mode as follows: Indoor EEV Outdoor EEV ODU Mode Active IDU Inactive IDU Main Stand By 0steps 480steps COOL...
  • Page 53 Engineering manual 5.2 EEV Open loop setting 5.2.1 Indoor unit’s EEV Open Loop The EEV initial value (open loop) of the indoor units is base on IDU Nominal Capacity; 5.2.2 Main EEV Open Loop For Heat Mode: The open loop value for the main EEV will be determined according to IDU total capacity For Cool Mode: It will always be 480steps.
  • Page 54 Engineering manual For heating mode:  Target SC Time Chart 5-3 5.3.2 Main EEV- Correction There will be no correction in cool mode for the main EEV (follows 480steps). The main EEV for heat mode will be controlled in a way to keep the Target compressor discharge super heat (SHdischarge) within normal operation range.

  • Page 55: System Faults And Protections

    Engineering manual 6 System Faults and protections 6.1 Faults 6.1.1 ODU faults OAT sensor fault  In Cooling mode, if OAT has fault, it will be replaced as a value. In Heat mode, if OAT has fault, it will be replaced as a value. OCIT sensor fault ...
  • Page 56 Engineering manual 6.2 Protections 6.2.1 ODU protection action 6.2.1.1 Deicing The process of deicing is divided into three sections entering, deicing procedure, and exiting. Entering Deicing  System will start deicing at heat mode according to the inputs of OAT, OCMT, TLD and compressor continuously on time;...
  • Page 57 Engineering manual 6.2.1.2 Oil return cycle Oil return cycle is only relevant in NORM state. Entering Oil return cycle condition  ODU starts to calculate TLOR (till last Oil return) timer calculation when it is start up or exit from last Oil return or Deicing.
  • Page 58 Engineering manual For heating mode:  Enter Oil return Exit Oil return Target RPS Comp Ofan According to heating control According to cooling control Main 480steps Chart 6-3 Exit Oil returning cycle condition  Oil return cycle has been operated for 4 minutes. 6.2.2 IDU protection action 6.2.2.1 IDU coil defrost protection When IDU is in cooling or dry mode, once IDU coil defrost protection act, IDU send signal to ODU.
  • Page 59 Engineering manual 6.3 Protections/Faults code list and actions 6.3.1 Protections/Faults code list Malfunction Malfunction name level Source code Mode conflict Water overflow No feedback from IFAN Motor IDU EEPROM Fault 2 IDU No Main BUS communication fault IDU SPI Communication fault IDU local bus power manage circuit fault IDU local bus power management fault IDU No physical address...
  • Page 60 Engineering manual Low pressure protection for switch OFAN Fault CDT sensor 1 is fault Comp discharge 2 protection High pressure sensor Fault Low pressure sensor Fault ODU No main BUS com. fault ODU SPI Communication fault ODU No PA/UA matching table ODU power management circuit fault ODU EEPROM Fault 2 ODU power management fault...
  • Page 61 Engineering manual Total IDU nominal capacity is out of range System （50%-130%×ODU nominal capacity） H3~H8 For future System H9-L5 Driver protection or fault Compresspr fault L7-L9 Driver protection or fault ODU power source current protection ODU MAC address failture LC-LF For future Table 6-1 6.3.2 Protections/Faults actions...
  • Page 62 Engineering manual 6.3.2.3 Level 12 ODU actions  All run as normal ODU 7 segment LED: Blinking IDU actions  HE: off; ION/ESF: off; FA: off IDU LED: Power is on and OPER is blink. Others are off. IR-Receiver: run as normal. 6.3.2.4 Level 13 ODU actions ...

  • Page 63: Part Iii Indoor Unit

    Engineering manual Part III Indoor unit 1 SLIM CASSETTE SERIES (CKV) ............................64 2 CASSETTE SERIES(KXV) ..............................89 3 FLOOR AND CEILING SERIES(SXV) ..........................114 4 SLIM DUCTED SERIES(DLV) ............................139 5 DUCTED SERIES(DSV) ..............................162 6 WALL MOUNTED SERIES(PNV)............................178...

  • Page 64: Slim Cassette Series (Ckv)

    Engineering manual 1 Slim cassette series (CKV) Model KBTU/h Brand CKV007 CKV009 CKV012 12.2 Airwell CKV015 15.3 CKV018 19.1...
  • Page 65 Engineering manual 1.1 Specification Model name Power source 220-240V，1Phase,50/60Hz Cooling capacity kBTU/h 7.51 9.55 12.28 15.35 19.11 Heating capacity kBTU/h 8.53 10.92 13.65 17.06 21.5 Cooling 0.021 0.024 0.03 0.042 0.053 Power input Heating 0.022 0.025 0.031 0.042 0.053 Cooling Running amperes Heating...
  • Page 66 Engineering manual 1.2 Characteristic  Easy installation The dimensions is according to the Europe standard, so there is no need to cut on the ceiling, just remove one piece of ceiling panel to install the unit. Chart 1-1  Fresh air from outside and treated air distribution to an adjacent room There are two side openings provided for installing separate ducts for outside air intake and treated air distribution to an adjacent room on the unit(Chart 1-2).
  • Page 67 Engineering manual Chart 1-3  The lower operating sound level The unit adopts turbo fan of big diameter to ensure enough airflow and lower operating sound level.  Agile air flow discharging This air conditioner has the optional 4-way/3-way/2-way air discharging according to installation location. Use sealing material in accessory parts to seal the related air outlets.
  • Page 68 Engineering manual 1.3 Dimension diagram and exploded view 1.3.1 Dimension diagram Chart 1-5 Chart 1-6...
  • Page 69 Engineering manual 1.3.2 Exploded view  Unit body exploded view Chart 1-7...
  • Page 70 Engineering manual  Panel exploded view Chart 1-8...
  • Page 71 Part number Description Quantity 453189500 Grille 453189900 Filter Assy. 453192700 Water-Level Switch 465720190 Front Plate Assy. 725x725 /CNV Airwell VRF 465720191 Front Plate Assy. 625x625 /CNV Airwell VRF 465080003 Display Cover 462350081 Evaporator Assy./CN DCI 25/35 R410A 453192600 Pump CN 465800084 Drain Pipe Assy/CN.
  • Page 72 Engineering manual 465340022 Cover1 /Front Plate 453190600 Cover2 /Front Plate 465340040 Cover3 /Front Plate 465080002 Cover4 /Front Plate 465800089 Axes bracket 1 465800090 Axes bracket 2 465360028 Orienting Support/Lever 464000020 Base Plate Assy./CN DCI 463700039 Distributing Pipe Assy./ VRF CNV 28 463650033 Gas Pipe Assy /VRF CNV 28 464250047...
  • Page 73 Part number Description Quantity 453189500 Grille 453189900 Filter Assy. 453192700 Water-Level Switch 465720190 Front Plate Assy. 725x725 /CNV Airwell VRF 465720191 Front Plate Assy. 625x625 /CNV Airwell VRF 465080003 Display Cover 462350082 Evaporator Assy./CNV VRF 45/56 R410A 453192600 Pump CN 465800084 Drain Pipe Assy/CN.
  • Page 74 Engineering manual 453190600 Cover2 /Front Plate 465340040 Cover3 /Front Plate 465080002 Cover4 /Front Plate 465800089 Axes bracket 1 465800090 Axes bracket 1 465360028 Orienting Support/Lever 464000020 Base Plate Assy./CN DCI 463700037 Distributing Pipe Assy./ VRF CNV 56 463650035 Gas Pipe Assy /VRF CNV 56 453188400 Fixing Plate/Evaporator（high) 470100003...
  • Page 75 Engineering manual 1.4 Electric board wiring diagram Chart 1-9...
  • Page 76 Engineering manual 1.5 Pipe size demand ΦLiquid pipe dimension(inch) ΦGas pipe dimension(inch) CKV007 1/4” 1/2” CKV009 1/4” 1/2” CKV012 1/4” 1/2” CKV015 1/4” 1/2” CKV018 1/4” 1/2”...
  • Page 77 Engineering manual 1.6 Installation 1.6.1 Installation accessories Optional accessories: Name Used for Panel 625×625 Gird ceiling installation Panel 725×725 Hard ceiling installation 1.6.2 Select the best location While selecting a place for the indoor unit: 1. Allow max. air flow to the desire space 2.
  • Page 78 Engineering manual 5. Installing the cassette will be easier with the use of a fork lift truck. Use the packing base by placing it between the cassette and the truck forks. 6. It is recommended to install the cassette, as far as possible, in the centre of the room, in order to optimise treated air distribution.
  • Page 79 Engineering manual Chart 1-11 B. Installing the indoor unit 1. Use installation template (supplied with the panel) when deciding the suspension bolt position. 2. Piping and wiring must be prepared beforehand inside the ceiling when suspending the unit. 3. The length of suspension bolts must be appropriate for a distance between the bottom of the bolt and the bottom of the unit of more than 15mm as shown in Chart 1-12.
  • Page 80 Engineering manual Chart 1-13 C. Duct installation 1. Side openings are provided for installing separate ducts for outside air intake and treated air distribution to an adjacent room. 2. Use a punch to remove the knock-down openings on the casing. Use a knife to make the suitable opening on the polystyrene behind the casing.
  • Page 81 Engineering manual Chart 1-15 D. Drain hose connection 1. Use standard hard PVC pipe (19mm) for the drain pipe. 2. Use the drain hose (Accessory) to change the direction. 3. Insert the drain hose until it connects the drain port very well, and then secure it tightly with the hose clamp (Accessory) 4.
  • Page 82 Engineering manual Caution: 1. Do not raise the drain pipe higher than 1m, or else there will be water leak risk. 2. Make sure the drain pipe has a downward gradient (no less than 1/100) And there are no water traps. Chart 1-17 1.6.4 Height compensation setting Install height...
  • Page 83 Engineering manual 1.6.5 Electric wiring Chart 1-18 POWER SUPPLY WIRING  1. Unscrew and remove the service lid. 2. Connect the power supply wiring to the power supply terminal block. 3. When doing this, press the power supply wiring under the wire clip tightly. Main-bus communication and R/C wiring ...
  • Page 84 Engineering manual 1.7 Electrical characteristics Unit Power Supply Fan Motor Model Volts Voltage Range CKV007 0.28 0.03 0.10 CKV009 0.28 0.03 0.10 Max. 264 220-240 CKV012 0.28 0.03 0.10 Min. 198 CKV015 0.44 0.09 0.30 CKV018 0.44 0.09 0.30 MCA: Min. Circuit Amps (A) MFA: Max.
  • Page 85 Optional/ Optional outfit/ Accessory Compulsory standard outfit Panel Optional outfit, if require please purchase it additional 625×625(Airwell) Select one type these two Panel Optional outfit, if require please purchase it additional 725×725(Airwell) Optional Optional outfit, if require please purchase it additional...
  • Page 86 Engineering manual 1.9 Operation and maintenance 1.9.1 Features and functions I-FEEL After setting I-FEEL function, the air conditioner takes the air temperature around the controller as priority. SLEEP After finishing SLEEP setting, 7 hours timer count down is starting, in the first three hours thermostat setting is gradually higher (cooling) or lower (heating), when seven hours past, unit turns off automatically.
  • Page 87 Engineering manual 1.9.3 Display introduction A. SIGNAL RECEIVER B. POWER INDICATOR This LED will be in red whenever power is on. Blinks for 3 seconds when heat mode is selected through mode button. C. OPERATION INDICATOR This LED will be in green during operation. It will blink once when receiving message from remote controller and keep blinking when there is any fault or protection.
  • Page 88 Engineering manual 1.9.4 Care and maintenance ● Cleaning the Air Filter To remove the air filters, open the front panel by rotating the 2 locks in counterclockwise from horizontal to vertical position, pulls out the filters, and cleans them by washing in warm soapy water and dry thoroughly.

  • Page 89: Cassette Series(Kxv)

    Engineering manual 2 Cassette series(KXV) Model KBTU/h Brand KXV021 21.5 KXV024 24.2 Airwell KXV030 30.7 KXV036 37.5...
  • Page 90 Engineering manual 2.1 Specification Model name Power source 220-240V，1phase,50/60Hz Cooling capacity KBTU/h 21.5 24.23 30.71 37.53 12.5 Heating capacity BTU/h 23.88 27.3 34.12 42.65 Cooling 0.049 0.054 0.094 0.133 Power input Heating 0.049 0.054 0.096 0.136 Cooling Running amperes Heating Type Turbo fan×1 Fan motor...
  • Page 91 Engineering manual 2.2 Characteristic  Large cooling capacity range, The cooling capacity of this series unit is from 21.5 KBTU/h to 37.5 KBTU/h, it can satisfy room’s large capacity requirement.  Fresh air from outside and treated air distribution to an adjacent room This characteristic is almost the same as CKV series.
  • Page 92 Engineering manual 2.3 Dimension diagram and exploded view 2.3.1 Dimension diagram Chart 2-3 KXV021/KXV024 B=230mm KXV030/KXV036 B=300mm Chart 2-4...
  • Page 93 Engineering manual 2.3.2 Exploded view  Unit body exploded view Chart 2-5...
  • Page 94 Engineering manual  Panel exploded view Chart 2-6...
  • Page 95 2.3.3 KXV021/024 components list Part number Description Quantity P0000371694 (S1004)(RoHS) Grill/Airwell P0000371695 (RoHS) Filter 4522037 Float switch 465720231 Front Plate assy./NKNV 90*90/Airwell VRF 201542500076 Evaporator 4525530 pump PSB-12 for OEM CASSETTE90X90 202742000006 (RoHS) Drain Pipe P0000146588 (S1004)(RoHS) Flap 202242500075 (RoHS) Drain pan Assy...
  • Page 96 Engineering manual 463750149 Liquid pipe Assy./VRF KMV63 452921400 Manifold Assy. / KN24 R410A 201242500082 (S1004)(RoHS) Fixing Plate/Evaporator 201242500083 (S1002)(RoHS) 202742000002 (RoHS) Cushion Rubber/Pump 201242000008 (RoHS) fan fixer 201142800079 (RoHS) Air Intake Assy. P0000146558 Cover1 /Front Plate P0000146559 Cover2 /Front Plate P0000146560 Cover3 /Front Plate P0000146561...
  • Page 97 Part number Description Quantity P0000371694 (RoHS) Grill/Airwell P0000371695 (RoHS) Filter /NKN 4522037 Float switch 465720231 Front Plate assy./NKNV 90*90/Airwell VRF 201542800076 Evaporator 4525530 pump PSB-12 for OEM CASSETTE90X90 202742000006 (RoHS) Drain Pipe P0000146588 (S1004)(RoHS) Flap 202242800075 (RoHS) Drain pan Assy...
  • Page 98 Engineering manual 463750150 Liquid pipe Assy./VRF KMV110 463650004 Manifold Assy./DCI KN80 201242800086 (S1004)(RoHS) Fixing Plate/Evaporator 201242800087 (S1002)(RoHS) Hook/Evaporator 202742000002 Cushion Rubber/Pump 201242000008 (RoHS) fan fixer 201142690001 (RoHS) Air Intake Assy. P0000146558 Cover1 /Front Plate P0000146559 Cover2 /Front Plate P0000146560 Cover3 /Front Plate P0000146561 Cover4 /Front Plate 201242000013...
  • Page 99 Engineering manual 2.4 Electric board wiring diagram Chart 2-7...
  • Page 100 Engineering manual 2.5 Pipe size demand ΦLiquid pipe dimension(inch) ΦGas pipe dimension(inch) KXV021 3/8” 5/8” KXV024 3/8” 5/8” KXV030 3/8” 5/8” KXV036 3/8” 5/8”...
  • Page 101 Engineering manual 2.6 Installation 2.6.1 Installation accessories Accessories part Accessories part Accessories part Out-let pipe sheath Wall conduit Expansible hook cover Unit operation Installation hook Tightening band manual Installation Installation paper board Drain elbow manual Bolt M6×12 Seal ring Out-let pipe clasp Wall conduit 2.6.2 Select the best location While selecting a place for the indoor unit:...
  • Page 102 Engineering manual 7. For the chosen location, check that the distribution grilles can be removed and that there is sufficient space available for maintenance and repairs. Chart 2-8 2.6.3 Unit installation A. Install the main body on the existing ceiling (to be horizontal) 1.
  • Page 103 Engineering manual 2. Please select the position of installation hooks according to the hook holes in the installation board.  Drill four holes of M12mm, 45-50mm deep at the selected positions on the ceiling. Then embed the expansible hooks (fittings). ...
  • Page 104 Engineering manual Chart 2-11 C. Install the panel Caution: Never put the panel face down on floor or against the wall, or on bulgy objects. Never crash or strike it. 1. Remove the inlet grid  Slide two grid switches toward the middle at the same time, and then pull them up. (Refer to chart 2-12) ...
  • Page 105 Engineering manual and the panel’s outlet has been reduced to about 4~6mm. The edge of the panel should contact with the ceiling well. (Refer to chart 2-16) Malfunction described in Chart 2-17 can be caused by inappropriate tightness the screw. If the gap between the panel and ceiling still exists after fastening the screws, the height of the indoor unit should be modified again.
  • Page 106 Engineering manual Chart 2-18 4. Hang the air-in grid to the panel, then connect the lead terminator of the swing motor and that of the control box with corresponding terminators on the body respectively. 5. Relocate the air-in grid in the procedure of reversed order. 6.
  • Page 107 Engineering manual deposit. (Refer to chart 2-20,a)  Do not drag the drainpipe violently when connecting to prevent the body from being pulled. Meanwhile, one support-point should be set every 1~1.5m to prevent the drainpipe from yielding (Refer to chart 2-20,b). Or you can tie the drainpipe with the connecting pipe to fix it.
  • Page 108 Engineering manual 2.6.4 Height compensation setting Install height Height code DS11 DS12 Caution: 2.3-2.7(m) 1. Cut the power supply when change the 2.7-3.1(m) height compensation setting. 3.1-3.5(m) 2. If you feel too noisy, please switch the DS11 and DS12 to lower height code level. >3.5(m) 2.6.5 Electric wiring Chart 2-23...
  • Page 109 Engineering manual 2.7 Electrical characteristics Unit Power Supply Fan Motor Model Volts Voltage Range KXV021 0.47 0.07 0.24 KXV024 Max. 264 0.47 0.07 0.24 220-240 Min. 198 KXV030 1.13 0.15 0.48 KXV036 1.13 0.15 0.48 MCA: Min. Circuit Amps (A) MFA: Max.
  • Page 110 Optional/ Optional outfit/ Accessory Compulsory standard outfit Panel Compulsory Optional outfit, please purchase it additional 950×950(Airwell) Optional Optional outfit, if require please purchase it additional LWCS Optional Optional outfit, if require please purchase it additional RC3i-1 Optional Optional outfit, if require please purchase it additional...
  • Page 111 Engineering manual 2.9 Operation and maintenance 2.9.1 Features and functions I-FEEL After setting I-FEEL function, the air conditioner takes the air temperature around the controller as priority. SLEEP After finishing SLEEP setting, 7 hours timer count down is starting, in the first three hours thermostat setting is gradually higher (cooling) or lower (heating), when seven hours past, unit turns off automatically.
  • Page 112 Engineering manual 2.9.3 Display introduction F. SIGNAL RECEIVER G. POWER INDICATOR This LED will be in red whenever power is on. Blinks for 3 seconds when heat mode is selected through mode button. H. OPERATION INDICATOR This LED will be in green during operation. It will blink once when receiving message from remote controller and keep blinking when there is any fault or protection.
  • Page 113 Engineering manual 2.9.4 Care and maintenance ● Cleaning the Air Filter 1) To remove the air filters, open the front panel by pushing the grille switches towards the middle simultaneously, pulls out the filters, and cleans them by washing in warm soapy water and dry thoroughly.

  • Page 114: Floor And Ceiling Series(Sxv)

    Engineering manual 3 Floor and ceiling series(SXV) Model KBTU/h Brand SXV007 SXV009 SXV012 12.2 SXV015 15.3 Airwell SXV018 19.1 SXV021 21.5 SXV024 24.2...
  • Page 115 Engineering manual 3.1 Specification Model name Power source 220-240V,1 Phase,50/60Hz Cooling capacity kBTU/h 7.51 9.55 12.28 15.35 19.11 21.5 24.23 Heating capacity kBTU/h 8.53 10.92 13.65 17.06 21.5 23.88 27.3 Cooling 0.02 0.021 0.023 0.037 0.07 0.082 0.09 Power input Heating 0.022 0.024...
  • Page 116 Engineering manual 3.2 Characteristic  Particular configuration design and remarkable appearance The appearance of SXV conditioner is aborative designed and it is very popular in Europe. The body of this type is very thin , so it can save installation space. ...
  • Page 117 Engineering manual 3.3 Dimension diagram and exploded view 3.3.1 Dimension diagram  SXV007/009/012 Chart 3-3  SXV015/018/021/024 Chart 3-4...
  • Page 118 Engineering manual 3.3.2 Exploded view Chart 3-6...
  • Page 119 Engineering manual 3.3.3 SXV007 components list Part number Description Quantity 484001 AIR INLET ASSY (SMALL) 221555 FILTER (SMALL) 4521713 Front plate assy (small) 373244 RIGHT PANEL 462350019 Evaporator Assy./ Ceiling22/28 VRF RC R410A 370281 AIR OUTLET FRAME (SMALL) 285032 DRAIN TUBE 372338 HORIZONTAL LOUVER FRONT (SMALL) 372339...
  • Page 120 Engineering manual 3.3.4 SXV009 components list Part number Description Quantity 484001 AIR INLET ASSY (SMALL) 221555 FILTER (SMALL) 4521713 Front plate assy (small) 373244 RIGHT PANEL 462350083 Evaporator assy./PMV 28 VRF 370281 AIR OUTLET FRAME (SMALL) 285032 DRAIN TUBE 372338 HORIZONTAL LOUVER FRONT (SMALL) 372339 HORIZONTAL LOUVER BACK (SMALL)
  • Page 121 Engineering manual 3.3.5 SXV012 components list Part number Description Quantity 484001 AIR INLET ASSY (SMALL) 221555 FILTER (SMALL) 4521713 Front plate assy (small) 373244 RIGHT PANEL 462350020 Evaporator Assy./ Ceiling36 VRF RC R410A 370281 AIR OUTLET FRAME (SMALL) 285032 DRAIN TUBE 372338 HORIZONTAL LOUVER FRONT (SMALL) 372339...
  • Page 122 Engineering manual 3.3.6 SXV015/018 components list Part number Description Quantity 484002 AIR INLET ASSY (BIG) 221554 FILTER PXD (BIG) 4521714 Front plate assy (big) 373244 RIGHT PANEL 462350025 Evaporator Assy./Ceiling56 VRF RC R410A 370280 AIR OUTLET FRAME (BIG) 285032 DRAIN TUBE 372336 HORIZONTAL LOUVER FRONT (BIG) 372337...
  • Page 123 Engineering manual 3.3.7 SXV021/024 components list Part number Description Quantity 484002 AIR INLET ASSY (BIG) 221554 FILTER PXD (BIG) 4521714 Front plate assy (big) 373244 RIGHT PANEL 462350030 Evaporator Assy./Ceiling63 VRF RC R410A 370280 AIR OUTLET FRAME (BIG) 285032 DRAIN TUBE 372336 HORIZONTAL LOUVER FRONT (BIG) 372337...
  • Page 124 Engineering manual 3.4 Electric board wiring diagram Chart 3-7...
  • Page 125 Engineering manual 3.5 Pipe size demand ΦLiquid pipe dimension(inch) ΦGas pipe dimension(inch) SXV007 1/4” 1/2” SXV009 1/4” 1/2” SXV012 1/4” 1/2” SXV015 1/4” 1/2” SXV018 1/4” 1/2” SXV021 3/8” 5/8” SXV024 3/8” 5/8”...
  • Page 126 Engineering manual 3.6 Installation 3.6.1 Installation accessories Accessories parts Qty. Accessories parts Qty. Accessories parts Qty. Tube locating Mounting plate Unit operation manual template Installation manual 3.6.2 Select the best location 1. There should not be any heat source or steam near the unit. 2.
  • Page 127 Engineering manual Reminder of MINIMUM clearances to be provided. (Chart 3-9)  Coolant connections can be made on the LHside, on the RH side or at the rear. (Chart 3-10)  Condensate evacuation possibilities: right, left, rear and front in the case of a ceiling mounted unit. (2 condensate ...
  • Page 128 Engineering manual Chart 3-11 Caution: After determining the outlet for the condensate evacuation (LH, RH, rear), make sure that the wall mounting is installed with a slope for condensate drainage. 3.6.4 Pipe selection and pre-installation The main advantage of your SXV product is the possibility of locating the coolant tubing on the wall ...
  • Page 129 Engineering manual Chart 3-12 Chart 3-13 Chart 3-14 Locate the LIQUID tube above the GAS tube.  Fit the nuts of the (for med) tubing into the recess provided on the template.  Secure the tubing with the clamps provided.(Chart 3-15) ...
  • Page 130 Engineering manual 3.6.5 Unit installation A. Install the unit to wall support FOR THE AIR INLET GRILLE: 1 Pull the grille 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) Chart 3-16...
  • Page 131 Engineering manual B. Installation of the SXV on the wall support Refer to the diagram below, for installation of the SXV.  Ceiling mounting (refer to the NOTE below).  Chart 3-18 C. Drainage pipe connection Water condensation must be evacuated directly to the outside; observe an appropriate slope for ...
  • Page 132 Engineering manual connecting the evacuation 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.
  • Page 133 Engineering manual 3.6.7 Electric wiring Chart 3-21 POWER SUPPLY WIRING  1. Unscrew and remove the service lid. 2. Connect the power supply wiring to the power supply terminal block. 3. When doing this, press the power supply wiring under the wire clip tightly. Main-bus communication and R/C wiring ...
  • Page 134 Engineering manual 3.7 Electrical characteristics Unit Power Supply Fan Motor Model Volts Voltage Range SXV007 0.43 0.05 0.15 SXV009 0.43 0.05 0.15 SXV012 0.43 0.05 0.15 Max. 264 SXV015 220-240 0.88 0.13 0.41 Min. 198 SXV018 0.88 0.13 0.41 SXV021 0.88 0.13 0.41...
  • Page 135 Engineering manual 3.8 Accessories selection Optional/ Optional outfit/ Accessory Compulsory standard outfit Optional Optional outfit, if require please purchase it additional LWCS Optional Optional outfit, if require please purchase it additional RC3i-1 Optional Optional outfit, if require please purchase it additional RC7i-1 Optional Optional outfit, if require please purchase it additional...
  • Page 136 Engineering manual 3.9 Operation and maintenance 3.9.1 Features and functions I-FEEL After setting I-FEEL function, the air conditioner takes the air temperature around the controller as priority. SLEEP After finishing SLEEP setting, 7 hours timer count down is starting, in the first three hours thermostat setting is gradually higher (cooling) or lower (heating), when seven hours past, unit turns off automatically.
  • Page 137 Engineering manual 3.9.3 Display introduction Chart 3-23 A . ON/OFF Press the button to turn ON/OFF the unit. B . POWER INDICATOR This LED will be in red color once power is supplied. Blink for 3 seconds when heat mode is selected through ON/OFF button. C .
  • Page 138 Engineering manual 3.9.4 Care and maintenance  Air Filter Cleaning This air conditioner has an air filter clogging indicator light (E). When this indicator lights up, 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.

  • Page 139: Slim Ducted Series(Dlv)

    Engineering manual 4 Slim ducted series(DLV) Model KBTU/h Brand DLV007 DLV009 DLV012 12.2 DLV015 15.3 Airwell DLV018 19.1 DLV021 21.5 DLV024 24.2...
  • Page 140 Engineering manual 4.1 Specification Model name Power source 220-240V，1phase,50/60Hz Cooling capacity kBTU/h 7.51 9.55 12.28 15.35 19.11 21.5 24.23 Heating capacity kBTU/h 8.53 10.92 13.65 17.06 21.5 23.88 27.3 Cooling 0.042 0.046 0.051 0.057 0.083 0.093 0.103 Power input Heating 0.043 0.048 0.053...
  • Page 141 Engineering manual 4.2 Characteristic  Specially thin appearance The DLV series body height is just 200mm and save much installation space. Chart 4-1  Lower static pressure The static pressure of the series is very low, so the operation sound is low. ...
  • Page 142 Engineering manual 4.3 Dimension diagram and exploded view 4.3.1 Dimension diagram Model DLV007~DLV015 DLV018~DLV024 1050 1090 Chart 4-3...
  • Page 143 Engineering manual 4.3.2 Exploded view  DLV007/009/012/015 exploded view Chart 4-4...
  • Page 144 Engineering manual  DLV018/021/024 exploded view Chart 4-5...
  • Page 145 Engineering manual 4.3.3 DLV007 components list Part number Description Quantity 462050073 Evaporator/LSV22 VRF R410A 464200038 Fixing Support/Over Flow Float Sensor/LSV VRF R410A 464280008 Filter/LSV22/28/36/45 VRF R410A 470250050 EPS Drain Pan /LSV22/28/36/45 VRF R410A 467490000 Over Flow Float Sensor FS-1A-31/ LSV22/VRF 467300069R Controller Assy.
  • Page 146 Engineering manual 4.3.4 DLV009/012 components list Part number Description Quantity 462050074 Evaporator/LSV28/36 VRF R410A 464200038 Fixing Support/Over Flow Float Sensor/LSV VRF R410A 464280008 Filter/LSV22/28/36/45 VRF R410A 470250050 EPS Drain Pan /LSV22/28/36/45 VRF R410A 467490000 Over Flow Float Sensor FS-1A-31/ LSV22/VRF 467300069R Controller Assy.
  • Page 147 Engineering manual 4.3.5 DLV015 components list Part number Description Quantity 462050075 Evaporator/LSV45 VRF R410A 464200038 Fixing Support/Over Flow Float Sensor/LSV VRF R410A 464280008 Filter/LSV22/28/36/45 VRF R410A 470250050 EPS Drain Pan /LSV22/28/36/45 VRF R410A 467490000 Over Flow Float Sensor FS-1A-31/ LSV22/VRF 467300069R Controller Assy.
  • Page 148 Engineering manual 4.3.6 DLV018 components list Part number Description Quantity 462050076 Evaporator/LSV56 VRF R410A 464200038 Fixing Support/Over Flow Float Sensor/LSV VRF R410A 464280009 Filter/LSV22/28/36/45 VRF R410A 470250051 EPS Drain Pan /LSV22/28/36/45 VRF R410A 467490000 Over Flow Float Sensor FS-1A-31/ LSV22/VRF 467300069R Controller Assy.
  • Page 149 Engineering manual 4.3.7 DLV021/024 components list Part number Description Quantity 462050077 Evaporator/LSV63/71 VRF R410A 464200038 Fixing Support/Over Flow Float Sensor/LSV VRF R410A 464280009 Filter/LSV22/28/36/45 VRF R410A 470250051 EPS Drain Pan /LSV22/28/36/45 VRF R410A 467490000 Over Flow Float Sensor FS-1A-31/ LSV22/VRF 467300069R Controller Assy.
  • Page 150 Engineering manual 4.4 Electric board wiring diagram Chart 4-6...
  • Page 151 Engineering manual 4.5 Pipe size demand ΦLiquid pipe dimension(inch) ΦGas pipe dimension(inch) DLV007 1/4” 1/2” DLV009 1/4” 1/2” DLV012 1/4” 1/2” DLV015 1/4” 1/2” DLV018 1/4” 1/2” DLV021 3/8” 5/8” DLV024 3/8” 5/8”...
  • Page 152 Engineering manual 4.6 Installation 4.6.1 Installation accessories Accessories parts Qty. Accessories parts Qty. Accessories parts Qty. Central control Screws,washer, Tubing insulation display(optional) dowels Unit operation manual Tie-Waps Drain tube+clips Installation manual 4.6.2 Select the best location 1. Allow max. Air flow to the desire space; 2.
  • Page 153 Engineering manual It is recommended to prepare a drainage point by professional plumber close to the unit.  For proper drainage, the passage must be planned with 1° down slope.  Prevent any upwards or reverse flow in any part. ...
  • Page 154 Engineering manual Chart 4-9 4.6.4 Display control unit A. Location Criteria It is recommended to install the Display Control Unit close to a ceiling in a central and neutral zone at typical  conditions. In addition, the aesthetic aspect should be considered. The Display Control Unit is connected to the main control board on the air conditioner (the indoor unit) by a ...
  • Page 155 Engineering manual 1. Main control board on indoor unit 2. Distribution board 3. Communication cable COLOR CHART Conn. Point Wire color Gold Green Black Brown Purple Yellow Orange Chart 4-10 4.6.6 Height compensation setting Install height Height code DS11 DS12 Caution: 2.3-2.7(m) 1.
  • Page 156 Engineering manual 4.6.7 Electric wiring Chart 4-11 POWER SUPPLY WIRING  1. Unscrew and remove the service lid. 2. Connect the power supply wiring to the power supply terminal block. 3. When doing this, press the power supply wiring under the wire clip tightly. Main-bus communication and R/C wiring ...
  • Page 157 Engineering manual 4.7 Electrical characteristics Unit Power Supply Fan Motor Model Volts Voltage Range DLV007 0.64 0.12 0.38 DLV009 0.64 0.12 0.38 DLV012 0.64 0.12 0.38 Max. 264 DLV015 220-240 0.64 0.12 0.38 Min. 198 DLV018 0.73 0.14 0.45 DLV021 0.73 0.14 0.45...
  • Page 158 Engineering manual 4.8 Accessories selection Optional/ Optional outfit/ Accessory Compulsory standard outfit Optional Optional outfit, if require please purchase it additional LWCS Optional Optional outfit, if require please purchase it additional RC3i-1 Optional Optional outfit, if require please purchase it with IRD RC7i-1 Optional Optional outfit, if require please purchase it with IRD...
  • Page 159 Engineering manual 4.9 Operation and maintenance 4.9.1 Features and functions I-FEEL After setting I-FEEL function, the air conditioner takes the air temperature around the controller as priority. SLEEP After finishing SLEEP setting, 7 hours timer count down is starting, in the first three hours thermostat setting is gradually higher (cooling) or lower (heating), when seven hours past, unit turns off automatically.
  • Page 160 Engineering manual 4.9.2 Special Tips Chart 4-12 A. MODE/RESET BUTTON If filter LED is ON, a short pressing of the mode button will reset filter timer and turn off the filter clean LED.  If filter LED is OFF, mode button is used for forced operation mode in Cooling-Heating-OFF as circle. ...
  • Page 161 Engineering manual 4.9.3 Generally Excessively low room temperature may harm your health. Avoid playing with the set point temperature (SPT).  During cooling, avoid direct sun. Keep curtains and blinds closed. Close doors and windows to keep the cool air ...

  • Page 162: Ducted Series(Dsv)

    Engineering manual 5 Ducted series(DSV) Model KBTU/h Brand DSV018 19.1 DSV021 21.5 DSV024 24.2 Airwell DSV030 30.7 DSV036 37.5...
  • Page 163 Engineering manual 5.1 Specification Model name Power source 220-240V，1 Phase,50/60Hz Cooling capacity kBTU 19.11 21.5 24.23 30.71 37.53 10.0 12.5 Heating capacity kBTU 21.5 23.88 27.3 34.12 42.65 Cooling 0.139 0.154 0.171 0.218 0.242 Power input Heating 0.144 0.16 0.178 0.224 0.249 Running...
  • Page 164 Engineering manual 5.2 Characteristic  Large cooling capacity range The cooling capacity of this series unit is from 19.1 KBTU/h to 37.5 KBTU/h, it can satisfy room’s large capacity requirement.  Large volume of airflow The DSV series adopt big diameter turbo fan, so the volume of airflow is large and the operation sound is low. Chart 5-1 ...
  • Page 165 Engineering manual 5.3 Dimension diagram and exploded view 5.3.1 Dimension diagram Chart 5-3...
  • Page 166 Engineering manual 5.3.2 Exploded view Chart 5-4...
  • Page 167 Engineering manual 5.4 Electric board wiring diagram Chart 5-5...
  • Page 168 Engineering manual 5.5 Pipe size demand ΦLiquid pipe dimension(inch) ΦGas pipe dimension(inch) DSV018 1/4” 1/2” DSV021 3/8” 5/8” DSV024 3/8” 5/8” DSV030 3/8” 5/8” DSV036 3/8” 5/8”...
  • Page 169 Engineering manual 5.6 Installation 5.6.1 Installation accessories Accessories parts Qty. Accessories parts Qty. Central control display(optional) Screws,washer, dowels Unit operation manual Tie-Waps Installation manual 5.6.2 Select the best location 1. Allow max. Air flow to the desire space; 2. Allow max return air flow; 3.
  • Page 170 Engineering manual 5.6.3 Unit installation A. Unit installation Insert 4 M10 or 3/8”threads rods into the ceiling.  Introduce the rods through the slots of unit suspension brackets.  Position the shock absorbers, add washers and screw the nuts until the unit is firmly supported. ...
  • Page 171 Engineering manual Chart 5-9 D. Air filter access Pull the eyelets in both sides of the filter till the filter is in horizontal position. Pull the air filter for further treatment. Chart 5-10...
  • Page 172 Engineering manual Chart 5-11 E. Check the drainage Put the water into the drain tray-Styrofoam.  Ensure that water flows out from drain hose of the indoor unit.  F. Location CRITERIA It is recommended to install the Display Control unit close to a ceiling in a centre and neutral zone at typical conditions. In addition, the aesthetic aspect should be considered.
  • Page 173 Engineering manual Connect the quick connector to the appropriate socket on the main control board in the indoor unit electrical box.  H. CONSIDERATIONS IN LOCATING THE REMOTE CONTROL UNIT Locate the Remote Control Unit in such a way that when mounted on its support on the wall, it will be in line sight ...
  • Page 174 Engineering manual 5.6.5 Electric wiring Chart 5-13 POWER SUPPLY WIRING  1. Unscrew and remove the service lid. 2. Connect the power supply wiring to the power supply terminal block. 3. When doing this, press the power supply wiring under the wire clip tightly. Main-bus communication and R/C wiring ...
  • Page 175 Engineering manual 5.7 Electrical characteristics Unit Power Supply Fan Motor Model Volts Voltage Range DSV018 1.23 0.22 DSV021 1.23 0.22 Max.264 220~240 DSV024 1.23 0.22 Min.198 DSV030 1.23 0.23 0.75 DSV036 1.23 0.23 0.75 MCA: Min. Circuit Amps (A) MFA: Max. Fuse Amps (A) KW: Fan motor Rated output (kW) FLA: Full Load Amps (A) Remote controller wiring...
  • Page 176 Engineering manual 5.8 Accessories selection Optional/ Optional outfit/ Accessory Compulsory standard outfit Optional Optional outfit, if require please purchase it additional LWCS Optional Optional outfit, if require please purchase it additional RC3i-1 Optional Optional outfit, if require please purchase it with IRD RC7i-1 Optional Optional outfit, if require please purchase it with IRD...
  • Page 177 Engineering manual 5.9 Operation and maintenance Please refer to DLV series corrective section above.

  • Page 178: Wall Mounted Series(Pnv)

    Engineering manual 6 Wall mounted series(PNV) Model KBTU/h Brand PNV007 PNV009 PNV012 12.2 Airwell PNV015 15.3 PNV018 19.1 PNV021 21.5...
  • Page 179 Engineering manual 6.1 Specification Model name Power source 220-240V,1 Phase,50/60Hz Cooling capacity kBTU 7.51 9.55 12.28 15.35 19.11 21.5 Heating capacity kBTU 8.53 10.92 13.65 17.06 21.5 23.88 Cooling 0.011 0.014 0.016 0.019 0.026 0.031 Power input Heating 0.012 0.015 0.017 0.022 0.03...
  • Page 180 Engineering manual 6.2 Characteristic  Easy installation A installation plate is supplied with the conditioner when leave factory. People can install the plate on wall first  and it make the installation very easy. Five directions can be selected optionally to install the refrigerant pipe. ...
  • Page 181 Engineering manual 6.3 Dimension diagram and exploded view 6.3.1 Dimension diagram  PNV007/009/012 Chart 6-3  PNV015/018/021 Chart 6-4...
  • Page 182 Engineering manual 6.3.2 Exploded view  PNV007/009/012 exploded view Chart 6-5...
  • Page 183 Engineering manual  PNV015/018/021 exploded view Chart 6-6...
  • Page 184 Engineering manual 6.3.3 PNV007 components list Part number Description Quantity 465800067 Grill Assy./WMV 36 VRF 4518655 Air filter 465720059 Front Frame Assy./ LEX7/9/12/14 4526952 Screw Cover 462350050 Evaporator Assy./WMV22 VRF RC R410A 4527434 Air Outlet Assy 4518664 Drain hose 4518638 Upper Louver 4526953 Lower Louver...
  • Page 185 Engineering manual connector) 464120016 Guard Net/VI-LEX 25/35 DCI 6.3.4 PNV009/012 components list Part number Description Quantity 465800067 Grill Assy./WMV 36 VRF 4518655 Air filter 465720059 Front Frame Assy./ LEX7/9/12/14 4526952 Screw Cover Evaporator Assy./ WMV22/28/36 VRF RC R410Ator Assy./ 462350034 WNG22/28/36 VRF RC R410A 4527434 Air Outlet Assy...
  • Page 186 Engineering manual 467480001 Ionizer/WNG NWNG SERIES 465800018 Air Inlet Frame A Assy./ LEX 465340013 Cover/Front Frame/Replace 461040003 Electronic Expansion Valve/VRF PXD Electronic Expansion Valve Coil/ CAM-MD12FKS-2（White 461050009 connector) 464120016 Guard Net/VI-LEX 25/35 DCI 6.3.5 PNV015/018 components list Part number Description Quantity 465800068 Grill Assy./WMV 45 VRF...
  • Page 187 Engineering manual 4518657 TUBE LOCK 467030063 Ionizer Wire UL1007#26*450mm*2/WMV36 467430000 Power Supply Unit /Ionizer 467480001 Ionizer/WNG NWNG SERIES 465160008 Air Inlet Frame A Assy/Lex-18 465360019 Cover/Display Window/Lex-18 461040003 Electronic Expansion Valve/VRF PXD Electronic Expansion Valve Coil/ CAM-MD12FKS-2 461050009 （White connector) 464120017 Guard Net/VI-LEX 50 DCI 6.3.6 PNV021 components list...
  • Page 188 Engineering manual 4518651 Cover Side Motor 453057900 Gear BOX ASSY 452918700 Support/horizontal louver 4518657 TUBE LOCK 467030063 Ionizer Wire UL1007#26*450mm*2/WMV36 467430000 Power Supply Unit /Ionizer 467480001 Ionizer/WNG NWNG SERIES 465160008 Air Inlet Frame A Assy/Lex-18 465360019 Cover/Display Window/Lex-18 461040003 Electronic Expansion Valve/VRF PXD Electronic Expansion Valve Coil/ CAM-MD12FKS-2（White 461050009 connector)
  • Page 189 Engineering manual 6.4 Electric board wiring diagram Chart 6-7...
  • Page 190 Engineering manual 6.5 Pipe size demand ΦLiquid pipe dimension(inch) ΦGas pipe dimension(inch) PNV007 1/4” 1/2” PNV009 1/4” 1/2” PNV012 1/4” 1/2” PNV015 1/4” 1/2” PNV018 1/4” 1/2” PNV021 3/8” 5/8”...
  • Page 191 Engineering manual 6.6 Installation 6.6.1 Installation accessories Accessories parts Qty. Mounting plate Air purifying filter(optional) Screws,washer, dowels Unit operation manual Installation manual 6.6.2 Select the best location 1. There should not be any heat source or steam near the unit. 2.
  • Page 192 Engineering manual Chart 6-8 6.6.4 Unit installation Unit offers five directions for installing refrigerant pipe, please installing the unit according to following installation: 1. Knockout hole and pull out the pipes. 4. Purifying filter installation (optional). 2. Install the unit to wall. 5.
  • Page 193 Engineering manual  Pull out the piping and hose Chart 6-9  Install the Indoor Unit 1. Hook the indoor unit onto the upper portion of installation plate (Engage the indoor unit with the upper edge of the installation plate). Ensure the hooks are properly seated on the installation plate by moving in left and right. 2.
  • Page 194 Engineering manual Chart 6-12 Chart 6-13  Secure the Indoor Unit 1. Tape the extra connecting cable in a bundle and keep it behind the chassis. Ensure that the connecting cable is not clamped in between the unit's hook (2 positions) and installation plate. 2.
  • Page 195 Engineering manual Chart 6-17  Purifying filter installation (optional) 1. Open the grille. 2. Remove the air filters. 3. Put air purifying filter into place as shown in illustration. Chart 6-18...
  • Page 196 Engineering manual  How to take out front grille Please follow the steps below to take out front grille if necessary during servicing. 1. Set the vertical airflow direction louver to the horizontal position. 2. Slide down the two caps of PNV 007/009/012 on the front grille as shown in the illustration at right, then remove the two mounting screws.
  • Page 197 Engineering manual 6.6.5 Electric wiring Chart 6-21 POWER SUPPLY WIRING  1. Unscrew and remove the service lid. 2. Connect the power supply wiring to the power supply terminal block. 3. When doing this, press the power supply wiring under the wire clip tightly. Main-bus communication and R/C wiring ...
  • Page 198 Engineering manual 6.7 Electrical characteristics Unit Power Supply Fan Motor Model Volts Voltage Range PNV007 0.23 0.02 0.06 PNV009 0.23 0.02 0.06 PNV012 Max. 264 0.23 0.02 0.06 220-240 Min. 198 PNV015 0.23 0.02 0.07 PNV018 0.23 0.02 0.07 PNV021 0.23 0.02 0.07...
  • Page 199 Engineering manual 6.8 Accessories selection Optional/ Optional outfit/ Accessory Compulsory standard outfit Optional Optional outfit, if require please purchase it additional LWCS Optional Optional outfit, if require please purchase it additional RC3i-1 Optional Optional outfit, if require please purchase it additional RC7i-1 Optional Optional outfit, if require please purchase it additional...
  • Page 200 Engineering manual 6.9 Operation and maintenance 6.9.1 Features and functions I-FEEL After setting I-FEEL function, the air conditioner takes the air temperature around the controller as priority. SLEEP After finishing SLEEP setting, 7 hours timer count down is starting, in the first three hours thermostat setting is gradually higher (cooling) or lower (heating), when seven hours past, unit turns off automatically.
  • Page 201 Engineering manual 6.9.3 Display Introduction Name of each part: Grille Air filter Air purifying filter Air outlet Vertical louver Horizontal louver Ionizer On unit operation Electrostatic filter Display Chart 6-23 A. IONIZER INDICATOR This LED will be on if ionizer is working. IONIZER ON/OFF SWITCH Used to switch the ionizer on/off by hand.
  • Page 202 Engineering manual 6.9.4 Care and maintenance Before performing any maintenance, make sure the power supply is disconnect. Cleaning the Air Filter  One indicator for filter clean is provided on your unit. If the indicator (F) lights up, it means the filter should be cleaned.

  • Page 203: Part Iv Outdoor Unit

    Engineering manual Part IV Outdoor unit 1 OUTDOOR UNIT .................................204 2 HMI(HUMAN AND MACHINE INTERFACE) INTRODUCTION ................236...

  • Page 204: Outdoor Unit

    Engineering manual 1 Outdoor unit Model KBTU/h Brand YAV112 38.2 Airwell YAV140 47.8...
  • Page 205 Engineering manual 1.1 Specification Model name YAV112 YAV140 Power supply 1Phase-50/60Hz,220-240V (KW) 11.2 Cooling (KBTU/h) 38.2 47.8 Capacity (KW) 12.5 Heating (KBTU/h) 42.7 54.6 Dimension (H×W×D) (mm) 950×1277×340 Net weight (kg) Running 13.9 19.4 Amperes (System) Cooling Power (KW) 3.125 4.365 input(System) Running...
  • Page 206 Engineering manual 1.2 Dimension diagram and exploded view 1.2.1 Dimension diagram Chart 1-1...
  • Page 207 Engineering manual 1.2.2 Exploded view(YAV112/140) Chart 1-2...
  • Page 208 Engineering manual 1.2.3 YAV112/140 components list Part number Description Quantity 465100017 Grill/ Air Outlet VRF 464660012 Front Plate Painting Assy./ Left CMV14 VRF 464600031 Base Plate Painting Assy./CMV14 VRF 464660010 Front Plate1 Painting Assy./ Right CMV14 VRF 464730005 Partition Plate Assy./CMV14 VRF 4523758 Nut M8 left 461010022...
  • Page 209 Engineering manual 4522600 Left Handle 464200008 Motor Support 2/ VRF CMV14 464860037 Fixing Plate Painting Assy./Valve/ CMV14 VRF 464660012 Front Plate Painting Assy./ Left CMV14 VRF 453083800 Support/OAT 464180004 Controll Box Plate 1/VRF 464250055 Cover 1/ Controll Box Plate /VRF 463250003 Liquid-Gas Separator/CMV14 VRF 461120001...
  • Page 210 Engineering manual 1.3 Electric board wiring diagram Chart 1-3...
  • Page 211 Engineering manual 1.4 Installation 1.4.1 Installation space requirement Chart 1-4 Chart 1-5 Chart 1-6 Chart 1-7 Chart 1-8 Chart 1-10 Chart 1-9 Unit:mm...
  • Page 212 Engineering manual Chart 1-10 Chart 1-11 Chart 1-12 Chart 1-13 Chart 1-14 Unit:mm...
  • Page 213 Engineering manual 1.4.2 Precaution If the warning is not observed, it may cause serious casualties. WARNING If the warning is not observed, it may cause injury or damage to the equipment. CAUTION WARNING ● Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electric components.
  • Page 214 Engineering manual 1.4.3 Installation tools required A. Installation of Air conditioner containing R4140A This air conditioner adopts the new HFC refrigerant (R410A) which doesn’t 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.
  • Page 215 Engineering manual 1.4.4 Introduction A. Combination The Indoor units can be installed in the following range, to learn which models of indoor units are compatible with unit, refer to the product catalogs. Total capacity/quantity of indoor units table Total normal Total quantity of capacity of Outdoor unit...
  • Page 216 Engineering manual 1.4.5 Select location WARNING The installation of the air conditioning unit must be positioned in a location that can sufficiently support its weight and give protection against adverse environmental conditions. Failure to do so may result in unit damage and possible human injury.
  • Page 217 Engineering manual 1.4.6 Transfer and fix up outdoor unit CAUTION Please carry the unit to installation place with its initial packaging as best as possible.  Be careful when hanging the unit with sling (for example), because the center of gravity is not the epicenter of this ...
  • Page 218 Engineering manual Chart 1-18 1.4.7 Installation synopsis Field pipes can be installed in three directions; this character increases the flexible of installation. Connecting liquid pipe (field supply) A the front Connecting gas pipe the rear Front plate the side Chart 1-19 Please knock out the hole as shown in the figure.
  • Page 219 Engineering manual Chart 1-20 1.4.8 Refrigerant piping WARNING It is forbidden to discharge refrigerant into the atmosphere. Collect the refrigerant in accordance with the Freon  collection and destruction law. If the refrigerant gas leaks during installation work, ventilate the room immediately. ...
  • Page 220 Engineering manual CAUTION Please apply attached refrigerant lines thermal insulation materials for insulation on indoor lateral flare connection  areas. And confirm that the operations are proceeding as item3&4 stated. Nonoxidizable brazing must be applied to pipes when proceeding brazing. ...
  • Page 221 Engineering manual Insert nitrogen into the tubing, and set the pressure to 0.02MPa with the reducing valve. 1 Refrigerant piping 4 Hands valve 2 Part to be brazed 5 Reducing valve 3 Taping 6 Nitrogen Chart 1-21 B. How to connect flare See the following table for flare part machining dimensions.
  • Page 222 Engineering manual Outer dia.of copper Further tightening pipe(mm)/(Inch) angle φ9.5(3/8”) 60~90 φ15.9(5/8”) 30~60 φ19.06(3/4”) 20~35 C. How to handle stop valve The stop valves for indoor-outdoor connecting piping are closed at shipment from the factory. Make sure to keep  the valve open during operation.
  • Page 223 Engineering manual E. Pipe selection and how to calculate Chart 1-26 Ranges that apply to refrigerant tubing lengths and differences in installation heights Items Marks Contents Length(m) Actual tubing length ≤150 Max. tubing length Equivalent tubing length ≤175 Allowable Difference between the max. length and the min. length ≤40 △L(L2-L3) tubing...
  • Page 224 Engineering manual Main tubing size Below Capacity(kW) Over Capacity(kW) Main tubing <32 ≥32 ≥66 size(LA) ODU model 11.2 11.2 11.2 Gas tubing(mm) Φ15.88 Φ15.88 Φ19.05 Φ19.05 Φ19.05 Φ22.23 Φ19.05 Φ19.05 Φ22.23 Liquid Φ9.52 Φ9.52 Φ12.70 Tubing(mm) Below 20.2 Capacity(kW) Over Capacity(kW) Main tubing <25 ≥25...
  • Page 225 Engineering manual Indoor unit tubing connection Indoor unit type Gas tubing(mm) Φ12.7 Φ15.88 Liquid tubing(mm) Φ6.35 Φ9.52 Table 3-6 Indoor unit tubing connection (l1, l2…ln-1) 1.4.9 Additional Refrigerant Charge Refrigerant Charge Amount at shipment (for outdoor unit)  YAV112 YAV140 Heat Pump Unit (kg) Table 3-7 According the refrigerant pipe length and dimension, we need charge additional refrigerant.
  • Page 226 Engineering manual Chart 1-27 STEP 1: Apply pressure 0.3Mpa (3.0kg/cm G) for 3 minutes or more. STEP 2: Apply pressure 1.5Mpa (15 kg/cm G) for 3 minutes or more. STEP 3: Apply pressure 3.73Mpa (38kg/cm G) for approx. 24 hours. Caution: If there is no leakage, the pressure will not go down;...
  • Page 227 Engineering manual R410A refrigerant, an error may occur in the refrigeration cycle.) Chart 1-28 Use a vacuum pump that has a high vacuum (below -755mmHg) and a large exhaust gas amount (over 40L/minute).  Perform vacuuming for 2 or 3 hours though time differs due to pipe length. In this time, check all packed valves at ...
  • Page 228 Engineering manual 1.5 Electric wiring 1.5.1 Requirement of the wiring Chart 1-29 For VRF system, all indoor units must be supplied with one power supply (220V/50Hz 1 phase). IDU power supply can either use the same power supply from outdoor unit(preferred) or use a separate power supply. For indoor unit wires requirement, please refer to indoor installation manual;...
  • Page 229 Engineering manual 1.5.2 Power supply wiring Power supply for outdoor unit Unscrew and remove the service lid, please refer to chart 30.  Press the power supply wiring under the wire clip.  Connect the power supply wiring to the power supply terminal block. ...
  • Page 230 Engineering manual Chart 1-31 1.5.3 Main communication wiring Main communication wiring is connect the wire to the terminal block F1/F2 , it connect between outdoor unit and indoor unit or between the indoor units. For indoor units’ connection please refer to the installation manual of indoor unit. For outdoor unit, connect the communication wire as following steps: Unscrew and remove the service lid, please refer to chart 30.
  • Page 231 Engineering manual (2) T-link type system: Chart 1-33 Following link type is not allowed! Chart 1-34 1.5.4 R/C communication wiring R/C communication wiring is connect the wire to the terminal block R1/R2 , it connect between the indoor units and must according to following rules: 1.Up to 16 indoor units can be connected in one R/C communication wiring;...
  • Page 232 Engineering manual (1) Only one R/C communication wiring in a refrigerant system: Chart 1-35 (2) More than one R/C communication wiring in a refrigerant system: Chart 1-36 1.5.5 Dry contact function introduction Chart 1-37 Dry contact with low voltage output definition ●...
  • Page 233 Engineering manual from HMI; Df and Dc open is forced cool mode; Df and DC short is forced heat mode (Optional). ● PSC: Power shedding mode. When these two pins (Do and Dc) are connected, the unit will enter power shedding mode. (Optional) Dry contact with high voltage output definition: ●Alarm: Short La and Na, an alarm signal with 220V voltage will be sent out when there is fault in system;...
  • Page 234 Engineering manual 1.6.2 Outdoor Control Mode Setting 1.There are four kinds of control mode —— Mode by First win IDU, Mode (Forced Cooling/ Heating) by ODU Dry contact, Mode by OAT and Mode by Master IDU. 2. The default outdoor control mode is mode by first win IDU. To set different outdoor control mode, ODU should be at Stand By state and HMI’s display is “noFbo”.
  • Page 235 Engineering manual 1.6.3 Dip switch introduction 1. There are twelve dip switches on main controller board. Refer to following picture: Chart 1-47 2. The first four dip switches define outdoor nominal capacity. 3. The second four dip switches define different compressor and driver . 4.

  • Page 236: Hmi(Human And Machine Interface) Introduction

    Engineering manual 2 HMI(Human and Machine Interface) introduction 2.1 HMI scope There are five 7-segment LED and five buttons in the main board. Definitions for these parts as following: 7-segment LED display Letter Display Letter Display Number Display...
  • Page 237 Engineering manual 2.2 HMI display content introduction Display Content Full Description Initial process Initial state Initial state with fault occurs, “ ” is fault code. Normal off with fault occurs. Force shut off with fault occurs. Force shut off without any fault. Diagnostic Installation test.
  • Page 238 Engineering manual Force heating with fault occurs. Force heating without fault occurs. Normal cooling state with fault happens. Normal cooling state without fault. Normal heating state with fault happens. Normal heating state without fault. (ODU) control mode setting. Mode (forced cooling/heating) by outdoor unit’s dry contact. Mode by first win indoor unit.
  • Page 239 Engineering manual 2.4 HMI Norm Status 2.4.1 Norm OFF state caused by fault LED1~5 are blinking when unit in Norm OFF, “ ” is fault code. Operate and display introduction: (1) Press Mode button to entry the next level. (2) Press Up or Down button, LED 1~5 will scroll →...
  • Page 240 Engineering manual LED 1~5 are blinking when unit in force heating state and fault occur, “ ”is fault code. If no  faults occur, is displayed, is the compressor operating speed. LED 1~5 are blinking when unit in normal cooling state and fault occur, “ ”is fault code.
  • Page 241 Engineering manual (5) Minute setting: LED1 displays the setting day number, LED2~ 3 displays the setting hour, LED4~5 are blinking “00” to indicate to set the minute. (a) Press Up or Down button, LED 4~5 will scroll “00” to “59”. (b) Press Set button to confirm the set.
  • Page 242 Engineering manual (7) Press Return button to last level. 2.5 Special test function 2.5.1 ITEST There are two cases which need ITEST: when the whole system is newly installed and it’s powered on for the first time; when you change a new ODU controller board or IDU controller board to the existing system. Operating steps: (1) Press Set button when LED 1~5 are blinking to enter installation test.
  • Page 243 Engineering manual 2.5.3 CTEST Operate steps: (1) Press Set button when LED 1~5 are blinking to enter system charge test. (2) Long press Return button to stop the process and return to NORM state. 2.5.4 LTEST Operate steps: (1) Press Set button when LED1~LED5 are blinking to enter lab test function.
  • Page 244 Engineering manual LED1~LED5 blinking when unit in PTEST cooling mode, means the  compressor operating speed; LED1~LED5 blinking when unit in PTEST Heating mode, means the  compressor operating speed; During PTEST operating, all buttons are not responding to pressing. ...

  • Page 245: Part V Controller Components

    Engineering manual Part V Controller components 1 VRF CONTROL SYSTEM INTRODUCTION........................246 2 LWC(LOCAL WIRED CONTROLLER) INTRODUCTION ..................247 3 LWCS(LOCAL WIRED CONTROLLER SIMPLIFIED) ....................278 4 IR-RC(INFRA-RED REMOTE CONTROLLER) ......................293...

  • Page 246: Vrf Control System Introduction

    Engineering manual 1 VRF control system introduction There are two communication wires in VRF control system, one is Main bus and the other is Local bus. Main bus is the communication wire between the ODU and IDU.  Local bus is the communication wire between the IDU and local wired controller(LWC/LWCS) ...

  • Page 247: Lwc(Local Wired Controller) Introduction

    Engineering manual 2 LWC(Local Wired Controller) introduction Control Mode Centralized control Number of indoor units which can be 1~16 group, up to 16 units controlled Use limitations The wiring length limit to 100 m...
  • Page 248 Engineering manual 2.1 LWC scope The new local wired controller (LWC) is designed to manage and control the system operations and temperature for  both single and multiple indoor units. It provides effective management of 1 to 16 units or groups. User can set all parameters for a better comfort.
  • Page 249 Engineering manual 2.2 Installation !Warning: Read this manual attentively before installing LWC. Don’t throw it away, please keep it in your files for future reference. Following parts included: Wood screws Wall plugs Spec. ----- Tapping Screw Φ3mm×22mm Wall plugsΦ6mm×30mm Quantity !Warning: Don’t install the controller with electricity! 2.2.1 Remove the upper part of LWC...
  • Page 250 Engineering manual Chart 2-2 2.2.3 Fasten LWC Attach the lower part of LWC to the wall by three screws.  For exposed mounting, fasten with the two included wood screw and plugs.  Note: Choose the flattest place for the mounting surface. Be careful not to distort the shape of the lower part by over-tightening the mounting screws.
  • Page 251 Engineering manual Chart 2-3 2.2.4 Check the setting There are two kinds of parts that technician can set, three dip switches (P1, P2, P3, P4, P5) and two jumpers (JP1,  JP2). Factory setting of dip switch  Factory setting of jumpers ...
  • Page 252 Engineering manual Need this step if meet following conditions, or else, skip it.  If there are two remote controllers in one R/C wiring, then one must be set as master controller, the other must be set as slave controller. Note: If there is only one remote controller in the R/C wiring, it must be master, otherwise, the system can’t work normally!
  • Page 253 Engineering manual 2.3 General operation 2.3.1 LWC interface LWC interface when door is close  - When door is closed, all groups (ALL) are selected. Operating ON/OFF/HOLIDAY is for all units. - Press ON/OFF/HOLIDAY button, LWC will act as following list: Button Name Function LCD Display...
  • Page 254 Engineering manual - Press the buttons LWC will act as following list: Button name Function Display description Turn on selected group Bar under group’s number is lighting. Turn off selected group Bar under group’s number is cleared. Press this button continuously MODE Cool- Heat- Dry- Fan- Auto is scrolled.
  • Page 255 Engineering manual Button name Function Display description Confirm action TIME SET Enter or exit real time setting mode CLEAR Clear program or a part of a program  Note: 1. Heat: Heat can be only activated in heat pump system, it is not available in cooling only system; in cooling only system, no Heat icon will be shown.
  • Page 256 Engineering manual 2.3.3 LWC operation  Group selection Step Action Description Display Default group number is blinking and relevant user address is shown ahead. For example: Default group is 8 when open the Open the Enter group door. door selection Selected group Selected group’s number is blinking and the relevant user address is shown ahead.
  • Page 257 Engineering manual  Mode setting  When door is open, select object group or All at first, then press MODE button, mode change command is only sent to the object as you choose.  LCD display: Press Mode button, following icons are scrolled. ->...
  • Page 258 Engineering manual  Comfort features setting  Only in ON state, comfort features can be set; if selecting ALL, only when all group in ON state, comfort features can be set.  When in Comfort setting, all buttons (except COMFORT,>,∧and∨) are inactive. ...
  • Page 259 Engineering manual HRV setting   When door is open, select object group or All at first, then press VENTILATION button, HRV setting command is only send to the object as you chose.  LCD display: Press VENTILATION button, following icons is scrolled. ->OFF->...
  • Page 260 Engineering manual Action Description LCD Display Thu – Fri – Sat – Sun selected day is displayed. Current Pn is blinking. (Note: When Weekdays is selected, icons from Mon to Fri (or Sun to Thu) are blinking together. When Week is selected icons from Mon to Sun are blinking together.) is blinking;...
  • Page 261 Engineering manual Action Description LCD Display “<” is pressed during setting (In Day column, timer action Move back to the previous column, Timers Option column, without confirmation of Selected column is blinking. column, Timer’s Hour the setting. column, Timer’s Minute column) “<”...
  • Page 262 Engineering manual Action Description Display “Program” is pressed for 5 seconds or Save and Exit copy Return to normal display no any program. operation for 30 seconds  How to query the copy state Short press “PROGRAM” button, choose the object program, the above line of the groups which has copied with the program will light.
  • Page 263 Engineering manual  ON button will let all groups turn on.  OFF button will let all groups turn off.  FAN button will let all groups share the same fan speed. -If all groups share the same fan speed setting in initialization stage, the fan speed icon will be displayed. Press FAN will start with this fan speed.
  • Page 264 Engineering manual 2.3.4 LWC maintenance The remote LWC does not need specific maintenance, use a clean and soft cloth to remove dust. Do not use water for cleaning. 2.3.5 LWC troubleshooting Read carefully above instructions and follow them in order. The guidelines below might be helpful to solve your problem.
  • Page 265 Engineering manual 2.4 Advanced operation 2.4.1 Technician Mode (TM) In technician mode, following functions are accessible: 1. Browse current message for indoor unit and outdoor unit. 2. Read or write user address for group. 3. Malfunction diagnostic for indoor unit, outdoor unit and LWC itself. Note: If LWC in INIT state, only “in”...
  • Page 266 Engineering manual The min Physical address of the group is displayed instead of SPT, press “∧” or “∨”button will scroll all physical address of the group, press “Left” button to exit to last level. Press “OK” button to confirm the selected indoor unit, press “Left” button to exit to last level.
  • Page 267 Engineering manual Status CDT1 {-30,130} {-30,130} ℃ CDT2 {-30,130} {-30,130} ℃ Sub-Cooling EEV {0,480} {0,480} Steps SCIT {-30,70} {-30,70} ℃ SCOT {-30,70} {-30,70} ℃ CST 1 {-30,70} {-30,70} ℃ CST 2 {-30,70} {-30,70} ℃ (2) Indoor unit message list: Message Name Display content Actual Content...
  • Page 268 Engineering manual (2) If there is no less than one unit without user address in the R/C wiring, “1” will be display instead of SPT; if all units have user address, “0” is display instead of SPT. Total number of user address will be shown instead of time of timer.
  • Page 269 Engineering manual a) “Comfort” button is used to select the options: current fault diagnostics- history fault diagnostics– exit diagnostic; In current diagnostic mode, is blinking; in history diagnostics mode, is light; exit diagnostic mode, icon is off. b) Up to 80 current fault codes and 80 history fault codes can be browsed for IDU. c) Up to 10 current fault codes and 5 history fault codes can be browsed for outdoor unit.
  • Page 270 Engineering manual 2.4.2 I-Feel function FEEL introduction  I-feel function is set by a DIP switch which hidden in the back of LWC. Remove the back cover, after setting DIP switch P2 (I-feel) to ON position, you can start I-feel setting. After set I-feel function, relevant indoor unit will take the temperature around LWC for load calculation.
  • Page 271 Engineering manual  How to set I FEEL Action Description Display Group’s above line is ON if I-Feel is attached to the group. Room Temperature is displayed instead of SPT. First dip e.g. I-Feel is attached to Unit 2, 5, 6, 8, 9, 12 switch P2 set Enter I-Feel setting to ON...
  • Page 272 Engineering manual 2.4.4 HRV/Fresh Air Setting (1) HRV or Fresh air is an additional equipment of VRF’s system, the function (VENTILATION) will invalid if no HRV or Fresh air is installed.  HRV is controlled like an indoor unit which has its physical address and user address. ...
  • Page 273 Engineering manual  Long presses “CLEAR” button again more than 5s or no operation for 30s, exit Easy check function to normal. But if LWC enter TM/I-feel setting (I-feel DIP switch set to ON) /ITEST, it exits “easy check” immediately. ...
  • Page 274 Engineering manual Fix Compressor On, OFF 0x01,0x00 Status CDT1 {-30,130} {-30,130} ℃ CDT2 {-30,130} {-30,130} ℃ Sub-Cooling EEV {0,480} {0,480} Steps SCIT {-30,70} {-30,70} ℃ SCOT {-30,70} {-30,70} ℃ CST 1 {-30,70} {-30,70} ℃ CST 2 {-30,70} {-30,70} ℃ Indoor unit message list: Message Name Display content...
  • Page 275 Engineering manual 2.4.8 Status Introduction  When in ITEST (1) When ITEST is started by HMI of outdoor unit, LWC will enter ITEST too, only icon is light by LCD. (2) LED: OFF; (3) Buttons: Invalid; (4) DIP switch: Invalid. ...
  • Page 276 Engineering manual (4) DIP switch: No any limitation for technician.  Fault display rules in Norm LWC only respond the last fault code. After the last fault code is solved, if outdoor unit or indoor unit or HRV or LWC itself still in fault status, only LED is blinking, no other icons is used to indicate fault status and fault code.
  • Page 277 Engineering manual 2.4.9 LWC Fault code introduction for LWC itself Operation Fault Code Malfunction name Limited for Display Different X of UA in same R/C wiring Some units without UA Some units without PA LED blinks. Total number of units in same R/C Only TM is active Only “in”...

  • Page 278: Lwcs(Local Wired Controller Simplified)

    Engineering manual 3 LWCS(Local Wired Controller Simplified) Control Mode Centralized control Number of indoor units which can be 1~16 group, up to 16 units controlled Use limitations The wiring length limit to 100 m...
  • Page 279 Engineering manual 3.1 LWCS scope LWCS is a simple R/C wiring controller, it is designed to manage and control the system operations and  temperature for both single and multiple indoor units. It provides effective management of 1 to 16 units in one group.
  • Page 280 Engineering manual 3.2 Installation !Warning: Read this manual attentively before installing LWCS. Don’t throw it away, please keep it in your files for future reference. Attached accessories: LWCS Tapping screw Wall plug Spec. ----- Ф3×22 Ф6×30 Quantity !Warning: Don’t install the controller with electricity! 3.2.1 Remove the upper part of LWCS (Chart 3-1) Insert minus screwdriver into the slots between the upper and the lower part of LWCS.
  • Page 281 Engineering manual Chart 3-2 3.2.3 Fasten LWCS (Chart 3) Attach the lower part of LWCS to the wall or electric parts box by two screws. Electric parts box is supplied in  some fields. For exposed mounting, fasten with the two included tapping screw and plugs. ...
  • Page 282 Engineering manual Factory setting of jumper  JP1 ----------------- Open JP2------------------ Shorted Change the setting of dip switch  Technician mode Normal mode Enable I-feel Disable I-feel Slave Master Need this step if meet following conditions, or else, skip it. If there are two remote controllers in one R/C wiring, then one must be set as master controller, one must be salve ...
  • Page 283 Engineering manual Chart 3-4...
  • Page 284 Engineering manual 3.3 General operation 3.3.1 Buttons introduction The remote controller LWCS is designed for easy use through blue background light and black icons and user friendly keyboard for general settings. Press the buttons in normal state [1], LWCS will act as following list: Button Function Display description...
  • Page 285 Engineering manual Temp- Adjust set point temperature as -1 SPT is changed from 30 degree to 16 degree: 30- 29- degree 28-……-16-Lo louver Adjust V-Louver ->OFF-> -> -> -> -> [1] Generally, two states are defined for LWCS, one is normal state, the other is technician mode (TM). Normal state is operated by users, TM is operated by technicians.
  • Page 286 Engineering manual I-Feel function  Take the temperature which detected by LWCS sensor as the room temperature. Every unit which is connected with LWCS will use the I-feel sensor as room temperature. Note: This function is set by technician. Window dry contact ...
  • Page 287 Engineering manual Set point temperature (SPT) setting  Step Action Description Display “Temp+” is pressed Scroll up to select SPT: 16°C ->17°C ->…..->29°C ->30°C -> when selected unit is 16 – 17 – ….. – 29 – 30-Hi Hi °C “Temp-”...
  • Page 288 Engineering manual Holiday  LWCS only shows the ON-OFF state of Holiday function by icon 3.3.4 Maintenance The remote LWCS does not need specific maintenance, use a clean and soft clothe to remove dust. Do not use water for cleaning. 3.3.5 Troubleshooting Read carefully the above instructions and follow them in order.
  • Page 289 Engineering manual 3.4 Advanced operation 3.4.1 Technician Mode (TM) There are there functions in TM status:  Display IDU/ODU temperature  Read/Write UA  Diagnostics All buttons’ functions are changed: On button is changed to “OK” button. Temp+ button is used as Up button. Temp- button is used as Down button.
  • Page 290 Engineering manual “Off” or “ON” button is pressed; X of user address blinks. 3. Adjust X of user address by “TEMP+” and “TEMP-” buttons. Change “X” from 1 to 8. 4. Press “off” button continue, “X” of user address stop blink, “YY” will blink, we can use “TEMP+” button or “TEMP-“...
  • Page 291 Engineering manual  Enter TM from INIT Display IDU/ODU temperature The function is inactive, if “Fan” button is pressed, 000 will blink instead of SPT. It will be off automatically after 5 seconds. Read/Write UA Same as “enter TM from NORM”. Diagnostics ODU/IDU/HRV The function is inactive, if “Louver”...
  • Page 292 Engineering manual Press “ON” button to confirm the selection IDU or ODU, then icon “RM” or “OAT” will light from blinking.  If “OAT” is confirmed, press “+” or “-” button to select object ODU.”0x01” means master ODU,”0x02” means slave 1 ODU,”0x03” means slave 2 ODU,”0x04”...

  • Page 293: Ir-Rc(Infra-Red Remote Controller)

    Engineering manual 4 IR-RC(Infra-Red Remote Controller) There are two patterns of IR-RC which can be selected by users: RC3i-1 and RC7i-1,they are able to control all series of VRF indoor units and have the advantage of beautiful appearance, delicacy configuration and strong function. External appearance Model name RC3i-1...
  • Page 294 Engineering manual 4.1 Appearance RC3i-1...
  • Page 295 Engineering manual RC7i-1...
  • Page 296 Engineering manual 4.2 Buttons and display introduction A. TRANSMITTER When you press the buttons of the remote control unit, the mark appears on the display to transmit the setting changes to the receiver in the air conditioner. LCD introduction Automatic Cooling Heating Fan only...
  • Page 297 Engineering manual C. MODE SELECTOR BUTTON Press this button to modify the air conditioner mode. D. FAN SPEED SELECTOR BUTTON Press this button to modify the fan speed. E. IONIZER & E.S.F AND FRESH-AIR BUTTON F. I FEEL TEMPERATURE SENSING AND ROOM TEMPERATURE DISPLAY BUTTON Push this button ro activate the temperature control in the remote control until and show the actual room temperature around the remote control.
  • Page 298 Engineering manual 4.3 PRECAUTIONS 4.3.1 Install the batteries Remove the lid in the rear part of the remote control unit.  Insert two AAA alkaline batteries of 1,5 V-DC.  Make sure the batteries point in the direction marked in the battery compartment. ...
  • Page 299 Engineering manual 4.3.3 Temperature sensor selection Under normal conditions the room temperature is detected and checked by the temperature sensor placed in the air  conditioner. Press the remote control I FEEL button to activate the temperature sensor placed in the remote control. This ...

  • Page 300: Part Vi Idu And Odu Troubleshooting

    Engineering manual Part VI IDU and ODU troubleshooting 1 FAULT AND PROTECTION CODE LIST ........................301 2 INDOOR UNIT TROUBLESHOOTING..........................303 3 OUTDOOR UNITS TROUBLESHOOTING ........................324...

  • Page 301: Fault And Protection Code List

    Engineering manual 1 Fault and protection code list Malfunction Malfunction name level Source code Mode conflict Water overflow No feedback from IFAN Motor IDU EEPROM Fault 2 IDU No Main BUS communication fault IDU SPI Communication fault IDU local bus power manage circuit fault IDU local bus power management fault IDU No physical address IDU No user address...
  • Page 302 Engineering manual ODU power management fault ODU No physical address Driver IC fault Over current protection (Driver) Heat sink overheating (Driver) Temperature unusual rise (Driver) DCI Driver com. error (Driver) Under voltage protection (Driver) Over voltage protection (Driver) Driver current detection circuit fault (Driver) Momentary power failure detection (Driver) Driver Micro computer reset (Driver) Synchronism loss detection (Driver)

  • Page 303: Indoor Unit Troubleshooting

    Engineering manual 2 Indoor unit troubleshooting Indoor unit - Mode conflict Remote controller display Possible reason  Unit mode conflict to the system operation mode  Master indoor unit change mode  Unit electrical board fault Diagnostic Check whether the indoor Stop using the indoor unit or change unit’s mode is conflicted with the unit’s mode...
  • Page 304 Engineering manual Indoor unit - Water overflow Remote controller display Possible reason  Float switch work abnormal  Float switch not connect to electrical board  Water pump work abnormal  Water pump not connect to electrical board  Drain pipe not install well or block ...
  • Page 305 Engineering manual Indoor unit - No feedback from IFAN motor Remote controller display Possible reason  Unit fan is blocked  Motor wire is not connected well  IFAN motor driver fault  Unit electrical board abnormal Diagnostic Clear the obstacle; make Is the indoor fan sure units fan can work blocked?
  • Page 306 Engineering manual Indoor unit - IDU EEPROM Fault 2, IDU EEPROM Fault 1 Remote controller display A4, bA Possible reason  IDU EEPROM parameter is fault  Unit electrical board is abnormal Diagnostic Change an electrical board...
  • Page 307 Engineering manual Indoor unit - Indoor unit communication fault Remote controller display Possible reason  Outdoor unit is power off  Main bus communication fault  Local bus communication fault  Unit electrical board is abnormal Diagnostic Does the outdoor unit Connect power supply get power? Is main bus wire...
  • Page 308 Engineering manual Indoor unit - IDU SPI communication fault Remote controller display Possible reason  Communication soft is fault  Unit electrical board is abnormal Diagnostic Change electrical board.
  • Page 309 Engineering manual Indoor unit - IDU Local bus power manage circuit fault/ IDU Local bus power management fault Remote controller display A7, A8 Possible reason  Local bus communication wire have a short or open circuit  Unit electrical board is abnormal Diagnostic Reconnect local...
  • Page 310 Engineering manual Indoor unit - Indoor unit no physical address Remote controller display Possible reason  Add a new indoor unit  Indoor unit’s EEPROM is destroyed Diagnostic Add a new indoor unit Do installations test. but did not do installation test? Does main bus wire Connect well the main bus wire...
  • Page 311 Engineering manual Indoor unit - Indoor unit no user address Remote controller display Possible reason  The unit is a new indoor unit  The unit is from other system Diagnostic Use LWC to assign the user address to the indoor unit.
  • Page 312 Engineering manual Indoor unit - IDU has no outdoor physical address Remote controller display Possible reason  Change a new outdoor electrical board  Outdoor unit’s EEPROM is fault Diagnostic Have changed a new outdoor electrical board Do installations test but did not do installation test? Change outdoor unit’s electrical...
  • Page 313 Engineering manual Indoor unit - Indoor unit power up register failure Remote controller display Possible reason  Add a new indoor unit  Indoor unit power failure  Indoor unit’s electrical board is abnormal Diagnostic Add new indoor unit? Do installations test? Did some indoor unit Do installations test? power failure?
  • Page 314 Engineering manual Indoor unit - Indoor unit power up register failure Remote controller display Possible reason  Indoor unit’s electrical board is abnormal Diagnostic Change indoor unit’s electrical board...
  • Page 315 Engineering manual Indoor unit - Indoor unit Defrost Remote controller display Possible reason  Indoor unit coil temperature temporary low  Indoor unit coil pipe block  Refrigerant leakage  Indoor coil middle temperature sensor fault  Indoor unit electrical expansion valve abnormal Diagnostic Does indoor unit exit this fault after a few...
  • Page 316 Engineering manual Indoor unit - Indoor unit ambient temperature sensor abnormal Remote controller display Possible reason  Room ambient temperature sensor is destroyed  Indoor electrical board is destroyed Diagnostic Does the sensor connect Connect sensor and run to the electrical board? indoor unit again Abnormal Is the resistance of the...
  • Page 317 Engineering manual Indoor unit - Indoor unit coil inlet temperature sensor abnormal Remote controller display Possible reason  Coil inlet temperature sensor is destroyed  Indoor electrical board is destroyed Diagnostic Does the sensor Connect sensor and run connect to the indoor unit again electrical board? Abnormal...
  • Page 318 Engineering manual Indoor unit - Indoor unit coil middle temperature sensor abnormal Remote controller display Possible reason  Coil middle temperature sensor is destroyed  Indoor electrical board is destroyed Diagnostic Does the sensor connect Connect sensor and run to the electrical board? indoor unit again Abnormal Is the resistance of the...
  • Page 319 Engineering manual Indoor unit - Indoor unit coil outlet temperature sensor abnormal Remote controller display Possible reason  Coil outlet temperature sensor is destroyed  Indoor electrical board is destroyed Diagnostic Does the sensor connect Connect sensor and run to the electrical board? indoor unit again Abnormal Is the resistance of the...
  • Page 320 Engineering manual Indoor unit - Indoor unit hot keep protection Remote controller display Possible reason  At the beginning mode change to heating mode  Ambient temperature is out of operation range  Static pressure select problem for duct type ...
  • Page 321 Engineering manual Indoor unit - Indoor unit bad HBS communication fault Remote controller display Possible reason  main bus communication wire have a short or open circuit  Indoor unit electrical board is abnormal Diagnostic Reconnect the mian bus Whether main bus communication wire communication wire is shorted or open?
  • Page 322 Engineering manual Indoor unit - Indoor unit coil overheating Remote controller display Possible reason  Refrigerant quantity is incorrect  Indoor coil middle temperature sensor abnormal  Indoor fan work abnormal Diagnostic Is it time to clean the Clean the filter, install them filter? well and run the unit again Check whether indoor...
  • Page 323 Engineering manual Indoor unit - Indoor unit leakage Remote controller display Possible reason  EEV itself leak even if it is closed to 0 step;  Indoor EEV coil is not fixed tightly;  Indoor one-way valve leakage;  Indoor coil inlet or outlet temperature sensor failure Diagnostic Is indoor EEV coil Fix EEV coil tightly...

  • Page 324: Outdoor Units Troubleshooting

    Engineering manual 3 Outdoor units troubleshooting Outdoor unit - Compressor discharge temperature protection Remote controller display d1, d8 Possible reason  Discharge temperature abnormal  Discharge temperature sensor abnormal  Outdoor electrical board abnormal liquid solenoid valve abnormal Diagnostic Is discharge temperature high than 107℃? Is discharge temperature sensor connecting well?
  • Page 325 Engineering manual Outdoor unit - High pressure protection for sensor Remote controller display Possible reason  High pressure sensor fault  High pressure sensor bad connection  High pressure abnormally increase  Outdoor electrical board abnormal Diagnostic Clean the obstacle or the coil, and then restart the unit Is outdoor coil blocked or too dirty?
  • Page 326 Engineering manual Outdoor unit - High pressure protection for switch1 or switch2 Remote controller display d3, EF Possible reason  High pressure switch action  High pressure switch fault  Outdoor coil bad heat exchange  Too much refrigerant quantity ...
  • Page 327 Engineering manual Outdoor unit - Low pressure protection for sensor Remote controller display Possible reason  Low pressure sensor fault  Low pressure sensor bad connection  Low pressure abnormally decrease  Outdoor electrical board abnormal Diagnostic Is outdoor electrical Connect the low pressure CN15 connected with and run the unit again.
  • Page 328 Engineering manual Outdoor unit - Low pressure protection for switch Remote controller display Possible reason  Low pressure switch work  Low pressure switch fault  Outdoor fan work abnormally  Low pressure abnormally decrease  Outdoor electrical board fault Diagnostic Take out pressure switch Change outdoor electrical...
  • Page 329 Engineering manual Outdoor unit - Outdoor fan fault Remote controller display Possible reason  OFAN motor work abnormal  OFAN is blocked  OFAN motor wire is not connected well  ODU PCB is abnormal Diagnostic Check whether CN25, Connect the wire and run CN26 connect with fan the unit again motor wire?
  • Page 330 Engineering manual Outdoor unit - Inverter discharge temperature sensor fault Remote controller display Possible reason  Inverter discharge temperature sensor is destroyed  Indoor electrical board is destroyed Diagnostic Connect sensor and run the Does the sensor connect unit again to the electrical board? Abnormal Take out the sensor and...
  • Page 331 Engineering manual Outdoor unit - High pressure sensor fault Remote controller display Possible reason  High pressure sensor is destroyed  Refrigerant is overcharged.  High pressure sensor wire bad connection  Outdoor electrical board fault Diagnostic Connect well the wire and Check whether high pressure sensor wire is run the unit again...
  • Page 332 Engineering manual Outdoor unit - Low pressure sensor fault Remote controller display Possible reason  Low pressure sensor is destroyed  Refrigerant leakage  Low pressure sensor wire bad connection  Outdoor electrical board fault Diagnostic Connect well the wire and run Check whether high pressure sensor wire is the unit again...
  • Page 333 Engineering manual Outdoor unit - No main BUS communication fault Remote controller display Possible reason  Main bus wire is open  Indoor unit power off  Add a new indoor unit  Outdoor electrical board fault Diagnostic Connect power supply Check whether indoor and run the unit again...
  • Page 334 Engineering manual Outdoor unit - Outdoor SPI communication fault Remote controller display Possible reason  Outdoor electrical board fault Diagnostic Change a new outdoor electrical board.
  • Page 335 Engineering manual Outdoor unit - Outdoor unit No PA/UA matching table Remote controller display Possible reason  Outdoor electrical board need do “ITEST”  Outdoor electrical board is fault Diagnostic Whether system has Do “ITEST” done “ITEST”? Change outdoor electrical board...
  • Page 336 Engineering manual Outdoor unit - Outdoor unit power management fault Remote controller display Possible reason  Main communication wire is shorted or open  Outdoor electrical board is fault Diagnostic Whether main communication wire Reconnect is shorted or open? communication wire Change outdoor electrical board...
  • Page 337 Engineering manual Outdoor unit - Outdoor unit EEPROM fault 2 Remote controller display Possible reason  Outdoor unit’s EEPROM 2 parameter has been destroyed.  Outdoor electrical board is fault Diagnostic Change outdoor unit’s electrical board.
  • Page 338 Engineering manual Outdoor unit - Outdoor unit power management fault Remote controller display Possible reason  Main bus wire is short  Use two pc monitor for one system  Outdoor electrical board fault Diagnostic Check whether all main Connect well the wire bus wire is connected and run the unit again well?
  • Page 339 Engineering manual Outdoor unit - Outdoor unit no physical address Remote controller display Possible reason  First Power on  Change a new outdoor electrical board  Outdoor EEPROM is fault  Outdoor Electrical board fault Diagnostic Is it a new unit and first Do installation test and power on? run the unit...
  • Page 340 Engineering manual Outdoor unit - Compressor driver problem Remote controller display E3,E4,E5,E6,E7,E8,E9,EA,Eb,EC,Ed Possible reason  Compressor driver has some faults Diagnostic Some important faults refer to the following content.
  • Page 341 Engineering manual Outdoor unit - Over current protection Remote controller display Possible reason  Outdoor current is too large  Coil or filter is dirty  Compressor speed is limited  Ambient temperature is out of operation range  Compressor driver is fault Diagnostic Restart the system and Change a new compressor...
  • Page 342 Engineering manual Outdoor unit - Hear sink overheating protection Remote controller display Possible reason  Outdoor fan work abnormal  Compressor driver bad installation  Ambient temperature is out of operation range  Compressor driver is fault Diagnostic Is ambient temperature Stop using unit out of system work range?
  • Page 343 Engineering manual Outdoor unit - DCI Driver communication error Remote controller display Possible reason  Communication wire bad connection  Communication wire destroyed  Outdoor electrical board fault Diagnostic Connect well the wire and run Check whether the unit again communication wire is connecting to CN10 and CN206?
  • Page 344 Engineering manual Outdoor unit - Synchronism loss detection Remote controller display Possible reason  Ambient temperature is out of operation range  Refrigerant quantity is more than needed  Compressor driver is fault Diagnostic Is ambient temperature stop using the unit out of system work range? release some refrigerant and...
  • Page 345 Engineering manual Outdoor unit - dip switch in reverse range Remote controller display Possible reason  Ambient temperature is out of operation range  Refrigerant quantity is more than needed  Compressor driver is fault  Outdoor electrical board is fault Diagnostic Reset the dip switch, power off/on Check whether dip...
  • Page 346 Engineering manual Outdoor unit - Outdoor ambient sensor fault Remote controller display Possible reason  Outdoor ambient temperature sensor is destroyed  Outdoor electrical board is fault Diagnostic Does the sensor connect Connect sensor and run to the electrical board? indoor unit again Abnormal Take out the sensor and...
  • Page 347 Engineering manual Outdoor unit - Compressor discharge temperature sensor fault Remote controller display Possible reason  Compressor discharge temperature sensor is destroyed  Outdoor electrical board is fault Diagnostic Does the sensor connect Connect sensor and run to the electrical board? indoor unit again Abnormal Take out the sensor and...
  • Page 348 Engineering manual Outdoor unit - Outdoor coil inlet sensor fault Remote controller display Possible reason  Outdoor coil inlet temperature sensor is fault  Outdoor electrical board is fault Diagnostic Connect sensor and run Does the sensor connect indoor unit again to the electrical board? Abnormal Change a new sensor...
  • Page 349 Engineering manual Outdoor unit - Inverter compressor discharge sensor fault Remote controller display Possible reason  Inverter compressor discharge sensor is fault  Outdoor electrical board is fault Diagnostic Connect sensor and run Does the sensor connect indoor unit again to the electrical board? Abnormal Change a new sensor...
  • Page 350 Engineering manual Outdoor unit - Outdoor coil middle sensor fault Remote controller display Possible reason  Outdoor coil middle temperature sensor is destroyed  Outdoor electrical board is fault Diagnostic Connect sensor and run Does the sensor connect indoor unit again to the electrical board? Abnormal Change a new sensor...
  • Page 351 Engineering manual Outdoor unit - Sub cooling inlet temperature sensor fault Remote controller display Possible reason  Sub cooling inlet temperature sensor is destroyed  Outdoor electrical board is fault Diagnostic Connect sensor and run Does the sensor connect indoor unit again to the electrical board? Abnormal Change a new sensor...
  • Page 352 Engineering manual Outdoor unit - Outdoor coil outlet sensor fault Remote controller display Possible reason  Outdoor coil outlet temperature sensor is destroyed  Outdoor electrical board is fault Diagnostic Connect sensor and run Does the sensor connect indoor unit again to the electrical board? Abnormal Change a new sensor...
  • Page 353 Engineering manual Outdoor unit - Sub cooling outlet temperature sensor fault Remote controller display Possible reason  Sub cooling outlet temperature sensor is destroyed  Outdoor electrical board is fault Diagnostic Connect sensor and run Does the sensor connect indoor unit again to the electrical board? Abnormal Change a new sensor...
  • Page 354 Engineering manual Outdoor unit - Compressor suction temperature sensor fault Remote controller display Possible reason  Compressor suction temperature sensor is fault  Outdoor electrical board is fault Diagnostic Connect sensor and run Does the sensor connect indoor unit again to the electrical board? Abnormal Change a new sensor...
  • Page 355 Engineering manual Outdoor unit - ODU EEPROM Fault 1 Remote controller display Possible reason  ODU EEPROM fault 1 parameter has been destroyed  Outdoor electrical board is fault Diagnostic Change outdoor electrical board...
  • Page 356 Engineering manual Outdoor unit - Deicing Remote controller display Possible reason  Outdoor coil is covered with ice  Refrigerant leakage  Outdoor electrical board is fault Diagnostic Is outdoor coil covered System is normal with ice before? Check whether system Do charge test to check whether enters deice is very refrigerant leakage.
  • Page 357 Engineering manual Outdoor unit - Oil return operation Remote controller display Possible reason  Too many oil leave compressor  Outdoor electrical board is fault Diagnostic Does compressor work a System is normal long time? Does oil return exit 4 System is normal minutes later and enter normal operation?
  • Page 358 Engineering manual Outdoor unit - Outdoor unit bad HBS communication fault Remote controller display Possible reason  Main bus communication wire is shorted or open  Outdoor electrical board is fault Diagnostic Reconnect the main bus Whether main communication wire communication wire shorted or open?
  • Page 359 Engineering manual System - Physical address collision fault Remote controller display Possible reason  Use two pc monitor for one system  Outdoor electrical board is fault Diagnostic Delete one, power off/on Are there two pc monitor and run the unit again in one system? Do installation test and System is normal...
  • Page 360 Engineering manual System - total IDU capacity is out of range Remote controller display Possible reason  Total IDU capacity is out of range Diagnostic Decreasing some indoor units and the total Whether total IDU capacity is IDU capacity should be lower than 130% over 130% ODU normal capacity? ODU normal capacity.
  • Page 361 Engineering manual Outdoor unit - Compressor driver fault Remote controller display HA, Hb, HC, Hd, HE, HF, L1, L2, L3, L4, L5, L6, L7, L8, L9 Possible reason  Compressor driver have some faults Diagnostic Some important faults refer to the following content.
  • Page 362 Engineering manual Outdoor unit - bad compressor or wire problem Remote controller display Possible reason  The inverter compressor wire is not connected well  The inverter compressor is bad Diagnostic Whether inverter compressor Connected the wire well wire is connected well? Change inverter compressor...
  • Page 363 Engineering manual Outdoor unit - Outdoor unit MAC address failure Remote controller display Possible reason  Outdoor unit electrical board is fault Diagnostic Change the outdoor unit electrical board.

  • Page 364: Part Vii Appendix

    Engineering manual Part VII Appendix 1 R410A SATURATION TABLE(GAUGE PRESSURE) .....................365 2 PC MONITOR OPERATION INSTRUCTION.........................366...
  • Page 365 Engineering manual 1 R410A saturation table(gauge pressure) R410A Saturation Table Press Press Press Press Temp Temp Temp Temp bar) bar) bar) bar) 299.7 1016.9 2437.8 314.9 1050 2499.1 14.3 330.6 1083.9 2561.6 20.1 346.7 1118.5 2625.1 26.1 363.3 1153.9 2689.9 32.4 380.3 1190...
  • Page 366 Engineering manual 2 PC Monitor Operation Instruction 2.1 Scope VRF Service tool is an assistant tool for VRF system; it can help read and record the status of VRF indoor and outdoor units. It includes functions as below: - Monitor and record system running data. - Status drawing and analysis.
  • Page 367 Engineering manual Click “Next” and select the destination folder. If you would like to install it into different folder, please click “Browse…” and select the folder you want. Click “Next” to continue install, “Cancel” to exit install task.
  • Page 368 Engineering manual Wait until install copy all files finish, then click “Finish” to end installation. If install successful, a shortcut icon is show in your computer’s desktop, and also show in start menu.
  • Page 369 Engineering manual 2.3.3 Remove PC monitor SW to your computer Click start menu and select “Program”->”VRF Service Tool”->”Uninstall VRF Service Tool”, a uninstall confirm dialog is show, Click “Next” to continue and “Cancel” if you do not want to remove it. Wait until uninstall program finish remove all VRF Service Tool files, Click “Finish”...
  • Page 370 Engineering manual 2.4 How to connect to VRF system Prepare a RS232C cable first. And then there are two ways for VRF Service Tool connected to VRF air-conditioner system. The first way is to connect to VRF system home bus (main bus) with transmit board (communication adaptor), and the second way is PC directly connected to MCU of outdoor unit with UART port.
  • Page 371 Engineering manual 2.5 How to use After successful setup VRF Service Tool, then you can use it following below steps. Double click the shortcut on personal desktop or in “VRF Service Tool” group of WINDOWS start menu to run program. 2.5.1 Monitor and record running status ...
  • Page 372 Engineering manual...
  • Page 373 Engineering manual IDU status table ODUstatus table In this window, the top half show the indoor unit status, and the bottom half shows the outdoor unit status, the buttons of the left tool bar are define as below: Click right button of mouse on unit item, a menu is pop up shows the operations of the selected unit item.
  • Page 374 Engineering manual show the detail parameters of the select indoor unit More details read or write the select indoor unit’s EEPROM. It’s only available for R&D engineers. Read/write EEPROM show the fault or protection log detail of the select unit Fault/Protection log And also, click right button of mouse on outdoor unit item, a menu is pop up shows the operations of the selected outdoor unit item.
  • Page 375 Engineering manual  Monitoring as graph mode Click right button of mouse, a “graph select” dialog is shown to set which lines are visible, color and line width.
  • Page 376 Engineering manual Click the value area of axis, a dialog is shown to set the range of axis.
  • Page 377 Engineering manual 2.5.2 Fault and protection log and query  Indoor unit fault/protection log and query Select the menu “Fault/protection log” of indoor unit operation menu, a dialog is show as like below, here list all the fault or protection’s happen time, level, code, name, you can query the current fault and history fault which stored in indoor units.
  • Page 378 Engineering manual  Outdoor unit fault/protection log and query Select the menu “Fault/protection log” of outdoor unit operation menu, a dialog is show as like below, here list all the fault or protection’s happen time, level, code, name, you can query the current fault and history fault which stored in outdoor units.
  • Page 379 Engineering manual 2.6 Troubleshooting 1. Why can’t I run the executable file after installing VRF Service Tool successful? First please make sure that at lease one RS232C port is setup in your computer and it can work well with you computer, then make sure the resolution of your display device is 1024X768 or above.
  • Page 380 AIRWELL France SAS 1 bis, Avenue du 8 mai 1945 SaintQuentin en Yvelines 78284 GUYANCOURT France Tel. +33(0) 01 39 44 78 00 FAX +33(0) 01 39 44 65 17 www.airwell.com...

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