Midea V4 Plus S Series Service Manual
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Midea V4 Plus S Series Service Manual

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Midea Commercial Air Conditioner
R410A All DC Inverter VRF V4 Plus S Series
220V~60Hz
Technical Service Manual

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Summary of Contents for Midea V4 Plus S Series

  • Page 1 Midea Commercial Air Conditioner R410A All DC Inverter VRF V4 Plus S Series 220V~60Hz Technical Service Manual...
  • Page 2 Contents 001 Part 1 General Information 011 Part 2 Selection Procedure 017 Part 3 Specifications & Performances 080 Part 4 Installation 128 Part 5 Troubleshooting...
  • Page 3 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Part 1 General Information 1. Features ......................2 2. Outdoor units ....................7 3. Indoor units lineup ..................9 4. Nomenclature ....................10 General Information...
  • Page 4 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 1. Features 1.1 Energy saving V4+S Series achieves the industry's top class energy efficiency in cooling and heating by utilizing all DC inverter compressors, all DC fan motors, and high efficiency heat exchanger. 4.39 3.91 3.54...
  • Page 5 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 1.1.4 High efficiency heat exchanger  Newly designed window type fins enlarge the heat exchange area and decrease air resistance, enhance heat exchange performance and save more energy.  Hydrophilic fins and internally threaded copper pipes optimize heat exchange efficiency. ...
  • Page 6 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 1.3 High reliability 1.3.1 Cycle duty operation The cyclical start-up sequence of outdoor units and DC inverter compressors equalized compressor duty and extends operating life 1.3.2 Back-up function In a multiple system, if one module is failed, other modules can be backup instead of the failed one for continuing operation.
  • Page 7 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 1.4 Enhanced comfort 1.4.1 Night silent operation mode Night Silent Mode feature which is easily set on the PCB board allows the unit to be set to various time options during Non-peak and Peak operation time minimizing the units noise output. Peak value of ambient temp.
  • Page 8 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 1.5 Easy installation and service 1.5.1 Auto addressing Outdoor unit can distribute addresses for indoor units automatically. Wireless and wired controllers can query and modify each indoor unit's address. 1.5.2 Simple communication wiring Centralized controller (CCM03 or CCM30) can be connected from indoor side or outdoor side (XYE terminals) at will.
  • Page 9 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 2. Outdoor units  Outdoor units lineup The outdoor units capacity ranges from 8HP up to 88HP in 2HP increments, a max. combination of 4 basic models. 8,10HP 14,16,18HP 20~36HP 38~54HP 56~72HP General Information...
  • Page 10 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09  Combination table Outdoor Unit Combination Capacity Max. N Model Outdoor Connectable Cooling Heating Compressors 10HP 12HP 14HP 16HP 18HP Units Indoor Units (kW) (kW) 25.2 10HP 31.5 12HP 33.5 37.5 14HP 16HP 18HP 20HP...
  • Page 11 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 3. Indoor units lineup Type Capacity Compact Low static Concealed One-way Two-way Four-way (kW) four-way pressure duct unit cassette Cassette cassette cassette duct (A5 Type) 11.2 11.2 11.2 12.5 Type Capacity High static Fresh air Ceiling &...
  • Page 12 MDV – 252 (8) W / D2 D N1 (B) Design Serial Number Refrigerant type N1:R410A Omit for R22 Power Supply D: 220V, 50Hz, 3N Inverter Type D2: Full DC, all inverter Outdoor Unit Capacity (HP) Cooling Capacity (×100W) Midea General Information...
  • Page 13 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Part 2 Selection Procedure 1. Introduction ....................12 2. Unit selection (based on cooling load) ............15 Selection Procedure...
  • Page 14 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 1. Introduction 1.1 Model selection procedure Select the model and calculate the capacity for each refrigerant system according to the procedure shown below.  -conditioning load, Calculate the maximum air-conditioning load for each room or zone.
  • Page 15 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz of the rooms. The indoor and outdoor unit combination is determined that the sum of indoor unit capacity index is nearest to and smaller than the capacity index at 100% combination ratio of each outdoor unit. Up to 13~36 indoor units can be connected to one outdoor unit.
  • Page 16 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 INDOOR UNIT CAPACITY INDEX Model Model Model Model Model Model Model Model Model Model Unit Size Capacity Index (kW) Model Model Model Model Model Model Model Model Model Model Unit Size Capacity 11.2 12.5 Index (kW)
  • Page 17 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz data means outdoor unit is lower. 1.5.2 Heating capacity modification H(m) -100 -110 180 190 200 210 220 90 100 110 120 130 140 150 160 170 L(m) 2. Unit selection (based on cooling load) 2.1 Given condition Condition: Cooling: indoor temperature 20...
  • Page 18 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Then calculate the outdoor capacity in 92% combination index: 26.8+{(28.3-26.8)/10}×2=27.1kW(92470Btu/h);  Capacity modification coefficient with pipe length 50m(164ft) and height difference 30m(98.4ft): 0.958  Each indoor unit cooling capacity Room A: MDV-D22T2 (27.1×22/258×0.958=2.21kW) (92470×7510/88000×0.958=7540Btu/h) Room B: MDV-D28T2 (27.1×28/258×0.958=2.82kW) (92470×9550/88000×0.958=9620Btu/h) Room C: MDV-D36T2 (27.1×36/258×0.958=3.62kW) (92470×12300/88000×0.958=12350Btu/h) Room D: MDV-D45T2 (27.1×45/258×0.958=4.53kW) (92470×15400/88000×0.958 =15460Btu/h)
  • Page 19 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Part 3 Specifications & Performances 1. Specifications ....................18 2. Dimensions ....................31 3. Service space ....................33 4. Piping diagrams ................... 35 5. Wiring diagram and field wiring ..............37 6. Electric characteristics ................40 7.
  • Page 20 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 1. Specifications Outdoor unit specifications Independent unit specifications Model MDV-252(8)W/D2DN1(B) MDV-280(10)W/D2DN1(B) MDV-335(12)W/D2DN1(B) Power supply V/Ph/Hz 220/3/60 25.2 28.0 33.5 Capacity kBtu/h 86.0 95.5 114.3 Cooling Power input 5.88 7.05 8.79 4.29 3.97 3.81 27.0 31.5...
  • Page 21 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Number of circuits Type R410A Refrigerant Factory charging kg(lbs.) 9(20) 9(20) 11(24) Φ12.7(Φ1/2) Φ12.7(Φ1/2) Φ15.9(Φ5/8) Liquid pipe mm(in.) Pipe Φ25.4(Φ1) Φ25.4(Φ1) Φ31.8(Φ1-1/4) Gas pipe mm(in.) connections Φ6(Φ1/4) Oil balance pipe mm(in.) 4.4/2.6 Design pressure(High/low) 640/380 Air flow rate...
  • Page 22 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Independent unit specifications Model MDV-400(14)W/D2DN1(B) MDV-450(16)W/D2DN1(B) MDV-500(18)W/D2DN1(B) Power supply V/Ph/Hz 220/3/60 40.0 45.0 50.0 Capacity kBtu/h 136.5 153.5 170.6 Cooling Power input 11.30 13.25 14.79 3.54 3.40 3.38 45.0 50.0 56.0 Capacity kBtu/h 153.5 170.6...
  • Page 23 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Factory charging kg(lbs.) 13(29) 13(29) 16(35) Φ15.9(Φ5/8) Φ15.9(Φ5/8) Φ19.1(Φ3/4) Liquid pipe mm(in.) Pipe Φ31.8(Φ1-1/4) Φ31.8(Φ1-1/4) Φ31.8(Φ1-1/4) Gas pipe mm(in.) connections Φ6(Φ1/4) Oil balance pipe mm(in.) 4.4/2.6 Design pressure(High/low) 640/380 Air flow rate 15620 15620 15620...
  • Page 24 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Combination unit specifications Model MDV-560(20)W/D2DN1(B) MDV-615(22)W/D2DN1(B) MDV-680(24)W/D2DN1(B) Combined type 10HP×2 10HP+12HP 10HP+14HP Power supply V/Ph/Hz 220/3/60 Cooling Capacity 56.0 61.5 68.0 kBtu/h 191.1 209.8 232.0 Power input 14.11 15.85 18.35 3.97 3.88 3.71 Heating Capacity...
  • Page 25 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Combination unit specifications Model MDV-730(26)W/D2DN1(B) MDV-780(28)W/D2DN1(B) MDV-850(30)W/D2DN1(B) Combined type 10HP+16HP 10HP+18HP 14HP+16HP Power supply V/Ph/Hz 220/3/60 Cooling Capacity 73.0 78.0 85.0 kBtu/h 249.1 266.1 290.0 Power input 20.29 21.85 24.53 3.60 3.57 3.46 Heating Capacity...
  • Page 26 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Combination unit specifications Model MDV-900(32)W/D2DN1(B) MDV-950(34)W/D2DN1(B) MDV-1000(36)W/D2DN1(B) Combined type 14HP+18HP 16HP+18HP 18HP×2 Power supply V/Ph/Hz 220/3/60 Cooling Capacity 90.0 95.0 100.0 kBtu/h 307.1 324.1 341.2 Power input 26.09 28.03 29.59 3.45 3.39 3.38 Heating Capacity...
  • Page 27 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Combination unit specifications Model MDV-1060(38)W/D2DN1(B) MDV-1130(40)W/D2DN1(B) MDV-1180(42)W/D2DN1(B) Combined type 10HP×2+18HP 10HP+14HP+16HP 10HP+16HP×2 Power supply V/Ph/Hz 380-415/3/50 & 380-415/3/60 & 220/3/60 Cooling Capacity 106.0 113.0 118.0 kBtu/h 361.7 385.6 402.6 Power input 28.90 31.59 33.52 3.67...
  • Page 28 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Combination unit specifications Model MDV-1230(44)W/D2DN1(B) MDV-1280(46)W/D2DN1(B) MDV-1350(48)W/D2DN1(B) Combined type 10HP+16HP+18HP 10HP+18HP×2 14HP+16HP+18HP Power supply V/Ph/Hz 380-415/3/50 & 380-415/3/60 & 220/3/60 Cooling Capacity 123.0 128.0 135.0 kBtu/h 419.7 436.7 460.6 Power input 35.08 36.64 39.33 3.51...
  • Page 29 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Combination unit specifications Model MDV-1400(50)W/D2DN1(B) MDV-1450(52)W/D2DN1(B) MDV-1500(54)W/D2DN1(B) Combined type 14HP+18HP×2 16HP+18HP×2 18HP×3 Power supply V/Ph/Hz 380-415/3/50 & 380-415/3/60 & 220/3/60 Cooling Capacity 140.0 145.0 150.0 kBtu/h 477.7 494.7 511.8 Power input 40.89 42.82 44.38 3.42...
  • Page 30 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Combination unit specifications Model MDV-1560(56)W/D2DN1(B) MDV-1630(58)W/D2DN1(B) MDV-1680(60)W/D2DN1(B) Combined type 10HP×2+18HP×2 10HP+14HP+16HP+18HP 10HP+14HP+18HP×2 Power supply V/Ph/Hz 380-415/3/50 & 380-415/3/60 & 220/3/60 Cooling Capacity 156.0 163.0 168.0 kBtu/h 532.3 556.2 573.2 Power input 43.69 46.38 47.94 3.57...
  • Page 31 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Combination unit specifications Model MDV-1730(62)W/D2DN1(B) MDV-1780(64)W/D2DN1(B) MDV-1850(66)W/D2DN1(B) Combined type 10HP+16HP+18HP×2 10HP+18HP×3 14HP+16HP+18HP×2 Power supply V/Ph/Hz 380-415/3/50 & 380-415/3/60 & 220/3/60 Cooling Capacity 173.0 178.0 185.0 kBtu/h 590.3 607.3 631.2 Power input 49.87 51.43 54.12 3.47...
  • Page 32 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Combination unit specifications Model MDV-1900(68)W/D2DN1(B) MDV-1950(70)W/D2DN1(B) MDV-2000(72)W/D2DN1(B) Combined type 14HP+18HP×3 16HP+18HP×3 18HP×4 Power supply V/Ph/Hz 380-415/3/50 & 380-415/3/60 & 220/3/60 Cooling Capacity 190.0 195.0 200.0 kBtu/h 648.3 665.3 682.4 Power input 55.68 57.61 59.17 3.41...
  • Page 33 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 2. Dimensions 2.1 Overall dimensions 8, 10HP, unit: mm (in.) 12, 14, 16, 18HP, unit: mm (in.) Specifications & Performances...
  • Page 34 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 2.2 Section dimensions 8, 10HP, unit: mm (in.) Liquid side (Connecting pipe diameter Φ12.7(Φ1/2)) 199(7-13/16) Gauge point 159(6-1/4) Detect the pressure/ Refrigerant replenishment Oil balance pipe Connecting among modules Gas side (Connecting pipe diameter Φ25.4(Φ1)) 195(7-11/16) R amplification...
  • Page 35 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 3. Service space Ensure enough space for maintenance. Combined modules must be level.  When installing the unit, leave enough space for maintenance. Unit: mm (in.) (Air-out ) >1000(39-3/8) 100~500 100~500 (3-15/16~19-11/16) (3-15/16~19-11/16) (Air-in ) (Air-in )
  • Page 36 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09  When the outdoor unit is lower than the surrounding obstacle, to avoid cross connection of the outdoor hot air from affecting the heat exchange capabilities, please add an air director onto the exhaust hood of the outdoor unit to facilitate heat dissipation.
  • Page 37 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 4. Piping diagrams 8-10HP DC Fan Stop Valve (High Pressure) EXV A Heat Exchanger Stop Valve ST 1 (Low Pressure) High Pressure Switch Oil Balance High Pressure Sensor SENP SV 4 Low Pressure SV 2 Receiver Pressure...
  • Page 38 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 14-16HP DC Fan Stop Valve (High Pressure) EXV A EXV B Heat Exchanger Stop Valve ST 1 (Low Pressure) High Pressure High Switch Oil Balance Pressure Sensor SENP Low Pressure Receiver Pressure Switch 14~16HP 18HP...
  • Page 39 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 5. Wiring diagram and field wiring 5.1 Wiring diagram 8, 10HP XS5 XP5 XS4XP4 XS6 XP6 XS7 XP7 Specifications & Performances...
  • Page 40 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Wiring diagram 12, 14, 16, 18HP XS5 XP5 XS4XP4 XS6 XP6 XS7 XP7 Specifications & Performances...
  • Page 41 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 5.2 Field wiring 5.2.1 Signal wire between outdoor unit and indoor unit Signal wire of indoor/outdoor unit adopts 3-core shielded wire (≥0.0012in. (0.75mm ) which has polarity, please connect it correctly. 5.2.2 Example wiring connection Specifications &...
  • Page 42 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 6. Electric characteristics Units Power supply Compressor Model Voltage Min. Max. TOCA MDV-252(8)W/D2DN1(B) 35.5 0.42 MDV-280(10)W/D2DN1(B) 35.5 0.42 MDV-335(12)W/D2DN1(B) 46.5 49.5 35.5+21.1 0.21×2 2.2×2 MDV-400(14)W/D2DN1(B) 54.6 54.4 35.5+21.1 0.36×2 3.4×2 MDV-450(16)W/D2DN1(B) 54.6 54.4 35.5+21.1 0.36×2...
  • Page 43 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 7. Capacity tables 7.1 Cooling capacity tables CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24...
  • Page 44 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Cooling capacity tables CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp. (°...
  • Page 45 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Cooling capacity tables CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp. (°...
  • Page 46 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Cooling capacity table 10HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 47 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Cooling capacity table 10HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 48 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Cooling capacity table 10HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 49 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Cooling capacity table 12HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 50 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Cooling capacity table 12HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 51 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Cooling capacity table 12HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 52 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Cooling capacity table 14HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 53 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Cooling capacity table 14HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 54 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Cooling capacity table 14HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 55 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Cooling capacity table 16HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 56 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Cooling capacity table 16HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 57 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Cooling capacity table 16HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 58 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Cooling capacity table 18HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 59 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Cooling capacity table 18HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 60 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Cooling capacity table 18HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature(° C DB/WD) Outdoor 20.8/14 23.3/16 25.8/18 27/19 28.2/20 30.7/22 32/24 temp.
  • Page 61 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 7.2 Heating capacity tables CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 17.5 4.34...
  • Page 62 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Heating capacity tables CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 17.2 5.59...
  • Page 63 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Heating capacity tables CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 16.9 6.84...
  • Page 64 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Heating capacity tables 10HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 20.4 5.34...
  • Page 65 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Heating capacity tables 10HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 20.1 6.87...
  • Page 66 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Heating capacity tables 10HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 19.8 8.40...
  • Page 67 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Heating capacity tables 12HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 24.3 6.35...
  • Page 68 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Heating capacity tables 12HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 23.9 8.18...
  • Page 69 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Heating capacity tables 12HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 23.5 10.00...
  • Page 70 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Heating capacity tables 14HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 29.1 7.91...
  • Page 71 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Heating capacity tables 14HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 28.7 10.18...
  • Page 72 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Heating capacity tables 14HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 28.2 12.44...
  • Page 73 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Heating capacity tables 16HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 32.4 9.03...
  • Page 74 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Heating capacity tables 16HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 31.9 11.63...
  • Page 75 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Heating capacity tables 16HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 31.4 14.22...
  • Page 76 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Heating capacity tables 18HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 36.3 10.17...
  • Page 77 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Heating capacity tables 18HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 35.7 13.09...
  • Page 78 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Heating capacity tables 18HP CR: Combination Ratio; TC: Total Capacity (kW); PI: Power Input (kW) (Compressor + Outdoor fan motor) Indoor temperature (° C DB) Outdoor temp. ° C DB ° C WB -19.8 35.1 16.00...
  • Page 79 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 8. Operation limits Cooling Heating ° F ° C ° C ° F Note: These figures assume the following operating conditions: Equivalent piping length: 7.5m (295-1/4inch) Level difference: 0 If the system is running in cooling mode, when the ambient temperature is lower than -5° C (23° F) or higher than 48°...
  • Page 80 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 9. Sound levels Notes: • Data is valid at free field condition • Data is valid at nominal operating condition • Sound level will vary depending on a range of factors Front such construction (acoustic...
  • Page 81 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 10. Accessories 10.1 Standard accessories Name Quantity Purpose Installation manual of outdoor unit Outdoor unit owner’s manual Be sure to deliver it to the customer Indoor unit owner’s manual Be sure to deliver it to the customer Toggling flathead screw For toggling of indoor and outdoor units Gauge point subassembly...
  • Page 82 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Part 4 Installation 1. Units installation ..................81 2. Air ventilation assembly installation ............86 3. Refrigerant piping selection ................ 90 4. Refrigerant pipe installation ................ 97 5. Drainage pipe engineering ................ 106 6.
  • Page 83 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 1. Unit installation 1.1 Installation of indoor unit 1.1.1 Installation procedure Determine the installation position →determine location → Install suspension rod → Install the indoor unit 1.1.2 Cautions for installation and check 1) Drawing check: Confirm the specifications, model and installation direction of the unit.
  • Page 84 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 1.3 Select installation position  Ensure that the outdoor unit is installed in a dry, well-ventilated place.  Ensure that the noise and exhaust ventilation of the outdoor unit do not affect the neighbors of the property owner or any surrounding ventilation.
  • Page 85 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz  Illustration of screw bolt position (Unit: in.( mm)) 15× 23 long u-shape hole Size (in.(mm)) 8, 10HP 12, 14, 16, 18HP 830(32-11/16) 1120(44-3/32) 960(37-13/16) 1250(49-7/32) 736(28-31/32) 736(28-31/32) 765(30-1/8) 765(30-1/8) 1.5 Master and slave unit setting When the quantity of outdoor unit is more than two in one system, the outdoor unit should be set in order from largest capacity unit to smallest capacity unit.
  • Page 86 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09  When the outdoor unit is higher than surrounding obstacles Unit: mm(in.) One row >1000(39-3/8) Front Front >100(4) >1000(39-3/8) Two rows >1000(39-3/8) >1000(39-3/8) Front Front Front Front >100(4) >1000(39-3/8) More than two rows >1000(39-3/8) Front Front...
  • Page 87 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz  If miscellaneous articles are piled around the outdoor unit, such articles must be 31-1/2inch(800mm) below the top of the outdoor unit. The articles must be 31-1/2inch(800mm) below the top of the outdoor unit. Otherwise, a mechanical exhaust device must be added.
  • Page 88 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 2. Air ventilation assembly installation Ventilation assembly is provided on site by an installation professional. When installing, please take off the mesh cover first, and then install the unit using the following method. 2.1 Installation of 8, 10HP Example A Unit: in.( mm)
  • Page 89 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz A≥300(11-3/4) (9-9/16) (13) (9-9/16) B≥250(9-7/8) 12-Φ3.2(Φ1/8) (37-13/16) C≤8000(314-15/16) (3/8) θ θ≤15° 2.2 Installation of 12, 14, 16, 18HP Example A Unit: in.( mm) Support 1210(47-5/8) 12 ST3.9 self-threading screws Radius (28-9/16) (3-9/16) Remove the two iron filter firstly Air outlet louver dimension (optional)
  • Page 90 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Example B Unit: in.( mm) Support (28-9/16) 12 ST3.9 self-threading screws Remove the two iron filters firstly 1210(47-5/8) Radius (3-9/16) Air outlet louver dimension (optional) 12-Φ3.2(Φ1/8) A≥300(11-3/4) B≥250(9-7/8) C≤8000(314-15/16) (3/8) θ θ≤15° (16-3/16) (16-3/16) (8.-3/8)
  • Page 91 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Outdoor fan performance The default static pressure of outdoor unit is 0 Pa, and 20Pa can be achieved when the steel mesh is removed. 8/10HP 12HP 12200 13400 12000 13200 13000 11800 12800 11600 12600...
  • Page 92 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 3. Refrigerant piping selection 3.1 Refrigerant piping length permitted value Outdoor unit (one or more outdoor units) (140) (140) Indoor unit (140) (140) The first branch joint Max. equivalent single piping length is 200m Max.
  • Page 93 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz  The length difference between (the outdoor unit to the farthest indoor unit) and (the outdoor unit to the nearest indoor unit) ≤40m (131ft). The farthest indoor unit: N10 The nearest indoor unit: N1 (L1+L5+L8+L9+j)-(L1+L2+L3+a) ≤40m (131ft) ...
  • Page 94 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09  Table 1: Indoor unit main pipe selection (L1~L9) Unit: mm (in.) Indoor unit main pipe mm (in.) Capacity of indoor unit Available branching kW(kBtu/h) Gas pipe Liquid pipe pipe assembly Φ15.9(Φ5/8) Φ9.53(Φ3/8) A<16.6(56.6) FQZHN-01D...
  • Page 95 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 4 units Main pipe  Table 3: Outdoor unit connection pipe selection (g1, g2, g3, g4, G1, G2) Unit: in.(mm) Pipe Gas pipe Liquid pipe Φ25.4(Φ1) Φ12.7(Φ1/2) 8~10HP g1,g2,g3,g4 Φ31.8(Φ1-1/4) Φ15.9(Φ5/8) 12~18HP Φ38.1(Φ1-1/2) Φ19.1(Φ3/4) Φ41.3(Φ1-5/8)
  • Page 96 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 1. Select indoor unit pipes from indoor unit to the nearest branch joint: a, b, c, d, e, f, g, h, i, j. Refer to table 5, the pipes of a~j are Φ5/8(15.9)/ Φ3/8(9.53). 2.
  • Page 97 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Indoor branch joint dimension Branch model Gas side joints Liquid side joints FQZHN-02D FQZHN-03D FQZHN-04D FQZHN-05D FQZHN-06D Installation...
  • Page 98 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 3.4.2 Outdoor branch joint dimension Branch model Gas side joints Liquid side joints 0D:31.8 ID:31.8 0D:15.9 ID:15.9 ID:25.4 ID:12.7 ID:19.1 ID:34.9 0D:34.9 0D:19.1 FQZHW-02N1D ID:22.2 ID:38.1 ID:15.9 ID:31.8 ID:19.1 ID:15.9 ID:31.8 ID:34.9 0D:15.9 0D:31.8 ID:12.7...
  • Page 99 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 4. Refrigerant pipe installation 4.1 Basic requirements 4.1.1 Operation procedure Determine the route and size of the pipeline according to the construction drawing Make and install brackets, hangers and supports Make and arrange pipe accessories → Recharge nitrogen gas for protection Welding →...
  • Page 100 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 3. Local fixing To avoid stress resulting from pipe expansion and shrinkage, it is usually required to conduct local fixing beside the wall through-holes of the branch pipe and end pipe. 4.1.4 Requirements for installing branch pipe subassembly When laying the branch pipe subassembly, pay attention to the following: 1) Do not replace branch pipe with tee pipe.
  • Page 101 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 4.2 Storage and maintenance of copper pipe 4.2.1 Pipe delivery and storage 1. Prevent bending or deforming during the delivery. 2. Seal the openings of the copper pipe with a plug or adhesive tape during the storage. 3.
  • Page 102 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 copper shavings from entering the pipe. 2) After the chamfering is completed, use veiling to remove the copper chip out of the pipe. 3) Ensure piping is not scarred, so as to avoid any breaches during flaring. 4) If the pipe end is deformed, cut the end off and then cut the pipe again.
  • Page 103 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Pipe Diameter Recommended length of tool lever Angle of further tightening in.(mm) in.(mm) 3/8" (9. 52) 60° ~90° About 7-7/8 (200) 1/2" (12. 7) 30° ~60° About 9-27/32 (250) 5/8" (15. 88) 30°...
  • Page 104 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 4.4 Brazing 4.4.1 Selecting refrigerant pipe 1. All pipe used shall comply with national or local standards (for example, pipe diameter, material, thickness, etc.) 2. Specifications: Seamless phosphorus to oxygenate copper pipe 3.
  • Page 105 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz brazing welding part brazing welding part nitrogen copper pipe elbows assistant pipe assembly copper pipe direct connection assistant pipe assembly 5. Standard brazing operation copper pipe 1/4" brazing weld part valve decompress valve oxygen nitrogen copper pipe...
  • Page 106 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Minimum inlaid depth Type Outer diameter of pipe (D) (in.(mm)) Gap A—D (in.(mm)) (B) (in.(mm)) 13/64(5)<D<5/16(8) 15/64(6) 0.002(0. 05)- 5/16(8)<D<15/32(12) 9/32(7) 0.01(0. 21) 15/32(12)<D<5/8(16) 5/16(8) 0.002(0. 05)- side 0.01(0. 27) 5/8(16)<D<63/64(25) 25/64(10) brazing welding 0.002(0.
  • Page 107 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz rush out. (flushing for first time). Repeat above step1 and step 2 to re-flush dirt (flushing multiple times) 3. When flushing, place a piece of white cotton at the pipe opening to check if there is any moisture. Method of thoroughly drying pipeline is as follows: 1) Use of nitrogen gas to flush the piping until no dirt and moisture remain.
  • Page 108 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 U-shaped branching pipe A direction view Wrong Correct 10° 10° Horizontal surface To avoid oil accumulation in the outdoor unit, please install the branching pipes properly. 5. Drainage pipe engineering 5.1 Installation essentials 5.1.1 Installation principles 1) Slope;...
  • Page 109 Drain pipe MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Drain pipe Tee joint Tee joint b. Incorrect connection: Tee joint Drain pipe × Advantages of correct connection: 1. No back flow. 2. The slope of two pipes can be regulated separately. Disadvantages of incorrect connection: 1.
  • Page 110 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 10. Merging pipe shall be done from above to the extent possible in order to avoid back flow to the system. 11. The end of drainage pipe shall not directly contact ground. indoor unit 45°...
  • Page 111 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Select drainage pipe diameter according to indoor unit’s combined flow volume. E.g. If one 1HP unit with 2L/h condensation discharge, the calculation of the combined flow volume of three 2HP units and two 1.5HP units is: 2HPx2L/hx3+1.5HPx2L/hx2 =18L 5.3.2 Relation between horizontal piping diameter and permitted displacement of condensation Inner diameter of Inner diameter...
  • Page 112 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Note: Air outlet could not be installed on the lifting part; otherwise water shall be discharged to ceiling or could not be discharged. 5.5 Overflow water test and water pass test 5.5.1 Overflow water test After finishing the construction of drainage pipe system, fill the pipe with water for 24 hours to check for leakage at joints.
  • Page 113 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 0.08”(2mm); when more than 11-13/16”(300mm), it is 0.12”(3mm). The permitted deviation of pipe end flatness is 0.08”(2mm). Discrepancy between two diagonal lines of rectangle duct shall not be more than 0.12”(3mm). Discrepancy between two diameters of any cross-cut circular flange shall not be more than 0.08”(2mm).
  • Page 114 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 2. Supporting, hanging and mounting brackets cannot be installed at air vent, valves, checking door and automatically controlled device, and distance to air opening or plugged tube shall not be less than 0.66ft.(200mm).
  • Page 115 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz a. Gas and liquid piping are insulated separately.. Note: After gas pipe and liquid pipe are insulated separately, Do not bind to tightly as the spliced insulation joint will be damaged. b. All pipe joints shall be insulated. Cautions: 1.
  • Page 116 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 above 1-37/64”(40mm) when adopting centrifugal glass cotton for insulation. 2) When inlet and outlet duct are installed in a room with air conditioning, insulation thickness should be above 1”(25mm) when adopting centrifugal glass cotton for insulation. 3) When adopting rubber/plastic or other materials, insulation thickness shall meet design requirements according to relevant calculations.
  • Page 117 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Phase (phase-in pressurization) Criteria Phase 1: large leakage after over three minutes of pressurization with 42.6PSI(3.0kgf/cm Phase 2: major leakage after over three minutes of pressurization with 213.3PSI(15. No pressure drop 0kgf/cm after modification Phase small...
  • Page 118 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 a. Inner side of pipeline b. Inner side of pipeline + upright c. Inner side of pipeline + upright+ outer side of pipeline 11. Vacuum Drying 11.1 Purpose and main points of vacuum drying 11.1.1 Purpose of vacuum drying 1.
  • Page 119 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 5) Vacuum drying shall be conducted from liquid and gas pipe simultaneously. There are a lot of functional parts like valves, which could shut down the gas flow midway. 11.2. 2 Special vacuum drying Special vacuum drying method shall be adopted when: 1) Discovery of moisture during refrigerant piping flush.
  • Page 120 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 5) The different leak detector. 12.2 Calculating the refrigerant recharge volume Calculate the additional refrigerant charge according to the diameter and the length of the liquid side pipe of the outdoor/indoor unit connection. The refrigerant is R410A. Note: Assume equivalent pipe length of the branch joint is 0.5m (for calculation purposes).
  • Page 121 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 2. RLA is based on the following conditions, Indoor temp. 27° C DB/19° C WB, Outdoor temp. 35° C DB 3. TOCA means the total value of each OC set. 4. MSC means the Max. current during the starting of compressor. 5.
  • Page 122 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 13.3.2 Indoor unit power supply wiring Single-phase 220~ 50/60Hz Leakage protector Manual switch Branch box Indoor unit Note:  Refrigerant piping system, signal wires between indoor units and outdoor units should be run together. ...
  • Page 123 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 13.4.2 Wiring example 13.4.3 Signal wire of centralized control When centralized control is needed, one CCM03 (indoor unit central controller) can only control the indoor units of the same refrigerant system via the X Y E port of the outdoor unit. Outdoor unit will automatically distribute addresses to the indoor units.
  • Page 124 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 14. Running test 14.1 Inspection and confirmation before commissioning  Confirm that refrigeration piping and communication wire of indoor and outdoor units have been connected to the same refrigeration system in order avoid unnecessary malfunctions.. ...
  • Page 125 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 2. Inspection list of trial run: 1) Confirm the fan impeller is rotating according to its intended route and turns smoothly. No abnormal vibration and noise. 2) Check for abnormal noise during operation of refrigerant system and compressor. 3) Confirm outdoor unit can detect each indoor unit.
  • Page 126 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 2. Total refrigerant charge = delivered refrigerant charge (nameplate) + supplemental refrigerant charge 3. Calculate the indoor volume (B) (as the minimum volume) 4. Calculate the refrigerant thickness. A/B ≤ critical thickness 0.3kg/m (0.02Ibs./ft ...
  • Page 127 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz The commissioning report form is shown as follows: Commissioning Report for Midea MDV Pro System Date: Item name: Address: Tel: Supplier: Delivery date: dd mm yy Installation section: Principal: Commissioning section: Principal:...
  • Page 128 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Test Data for Test Run of __________System Model of outdoor unit Production series no. Operation data of outdoor unit (Cooling) Unit No.1 No.2 No.3 Run Voltage V Total current of run A Operation current of compressor A High-pressure pressure Kg/cm Low-pressure pressure Kg/cm...
  • Page 129 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz System check (SW2) SW2: (CHECK)――Used to query outdoor unit data. Check point sequence and corresponding actuality is as follows: Normal Content (present frequency) Note display 0 - - Outdoor unit address Master unit: 0; slave unit: 1, 2, 3. 1 - - Outdoor unit capacity Refer to note 1...
  • Page 130 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Part 5 Troubleshooting 1. Outdoor main control board instructions ..........129 2. Error code table ..................133 3. Troubleshooting ..................134 Troubleshooting...
  • Page 131 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 1. Outdoor main control board instructions 1.1 Main PCB ports instructions Outdoor main PCB ports instructions Content Port voltage 1 CN10 Discharge temperature detection port of inverter compressor A DC0~5V (in dynamic change) 2 CN11 Discharge temperature detection port of inverter compressor A or B DC0~5V (in dynamic change)
  • Page 132 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 1.2 Query content instructions Normal Content (present frequency) Note display 0 - - Outdoor unit address Master unit: 0; slave unit: 1, 2, 3. 1 - - Outdoor unit capacity Refer to note 1 2 - - Outdoor unit quantity Available for master unit...
  • Page 133 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 1.3 Dial switch setting S1: Starting time setting S5: Priority mode selection Starting time is 10 minutes Heating priority mode (default) Starting time is 12 minutes (default) Cooling priority mode VIP (address no. 63) priority mode or voting S2: Night silent time setting priority mode Night silent time is 6h/10h (default)
  • Page 134 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 ENC1: Outdoor unit address setting Only 0, 1, 2, 3 are available. 0 is for master unit; 1, 2, 3 are for slave units ENC2: Outdoor unit capacity setting Only 0, 1, 2, 3, 4, 5, 6, 7 are available. 0: 8HP;...
  • Page 135 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 2. Error code table Error Content Note code Communication error between outdoor units Only display on the faulty slave unit Communication error between indoor units and the master unit. Only display on the master unit Reserved Malfunction of outdoor ambient temperature sensor (T4) Display on the faulty unit...
  • Page 136 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 3. Troubleshooting 4.1 E0: Communication error between outdoor units The error will only display on faulty slave unit, all the ODUs will be on standby. E0: Communication error between outdoor units ODU addresses (ENC1) are set incorrectly (the master unit address should be set as 0, slave units Reset the ODU addresses addresses should be set from 1 to 3, and the...
  • Page 137 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 4.2 E2: Communication error between indoor units and the master unit The error will only display on faulty slave unit, all the ODUs will be on standby. E2: Indoor units and outdoor unit communication error Communication wires P, Q, E are short circuited or disconnected...
  • Page 138 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 4.3 E4: Malfunction of outdoor ambient temperature sensor (T4) 4.4 E7: Malfunction of discharge temperature sensor The error will only display on faulty unit, all the ODUs will be on standby. E4/E7: Malfunction of temperature sensor Connection ports for temperature Fasten the temperature sensor...
  • Page 139 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 4.5 E5: Malfunction of power supply voltage The error will only display on faulty unit, all the ODUs will be on standby. E5: Malfunction of power supply voltage Voltage of power supply is too high or too low (the normal voltage between A Provide normal power supply and N (B and N, C and N) should be...
  • Page 140 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 4.6 E8: Faulty outdoor unit address The error will only display on faulty slave unit, all the ODUs will be on standby. E8: Faulty outdoor unit address The ODU's address is more than 3 or The addresses should be set less be set repeatedly than 3 and differently...
  • Page 141 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 4.7 xH0: Communication malfunction between main control chip and inverter driver chip H1: Communication malfunction between main control chip and communication chip The error will only display on faulty unit, all the ODUs will be on standby. xH0/H1 Power supply for main PCB and Provide normal power supply...
  • Page 142 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 H2: Outdoor unit quantity is decreased 4.10 H3: Outdoor unit quantity is increased The error will only display on master unit, all the ODUs will be on standby. H2/H3 Communication wire between Fasten the communication outdoor units is loose wire...
  • Page 143 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 4.11 H7: Faulty indoor unit quantity The error will only display on the master unit, all the ODUs will be on standby. It will display when the quantity of indoor units decrease above 3 minutes. H7: Faulty indoor unit quantity Communication terminals P Q E are Fasten the communication...
  • Page 144 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 4.12 H8: Malfunction of pressure sensor for discharge pipe When the discharge pressure is lower than 0.3MPa (43.5PSI), the system will display error H8, the ODUs will be on standby. When the discharge pressure is back to normal, H8 is removed and normal operation resumes. H8: Malfunction of pressure sensor for discharge pipe High pressure sensor connection port on main control Fasten the connection port...
  • Page 145 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 4.13 yHd: Slave unit malfunction (y refers to corresponding slave unit) yHd is only displayed on the master unit. y stands for corresponding slave unit. If y is 1, it refers No.1 slave unit which has malfunctioned.
  • Page 146 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 * The phenomenon of low pressure side blockage The discharge temperature is higher than normal value*, low pressure is lower than normal value*, current is lower than normal value* and suction pipe may be frosting. 4.
  • Page 147 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz value, abnormal compressor noise, pressure meter is not steady. * For normal system running parameters please refer to attached table 3. * If the system has a three-phase protector, and the three-phase protector is connected with the high pressure switch in series, the system will display P1 protection when initially powered on, and P1 protection will disappear after system is steady.
  • Page 148 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 4.20 xP3: Over current protection of compressor (When x is 1, it refers to A compressor; 2 refers to B compressor) When inverter compressor current is too high, the system will display P3 protection, the ODU in standby. When the current goes back to normal range, P3 disappears and normal operation resumes.
  • Page 149 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 4.21 P5: Condenser temperature protection When condenser temperature is over 65 C (149 F), the system will display P5 protection, the ODUs will go on standby. When the temperature goes back to normal range, P5 protection finishes and normal operation resumes.
  • Page 150 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 4.22 xH4: Inverter module protection When the system displays H4 error code, the system can resume only by restarting the machine. In the event of H4, the cause for error should be addressed promptly to avoid system damage. When error code...
  • Page 151 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Specific error code for inverter module Check module and L0: inverter module protection compressor Check power supply L1: low voltage protection of module Check power supply L2: high voltage protection Check for inverter module of module and ensure DC generatrix is connected correctly...
  • Page 152 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 L0 troubleshooting Step 1: Compressor check Measure the resistance between each two of U, V, W terminals of the compressor, all resistance levels should be the same and equal to 0.9~5 Ohms. (Fig. A and Fig. B) Measure the resistance between each of U, V, W terminals of the compressor and ground (Fig.
  • Page 153 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz L1/L4 troubleshooting Step 1: Check the DC voltage between terminal 1 and 2, the normal value should be 270V~360V, if the voltage is lower than 270V, go to step 2. Step 2: Check for rectifier wiring circuit. If wires are loose, fasten the wires. If wires are OK, replace the main PCB.
  • Page 154 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 If the values are normal, that means PCB has been malfunction, needs to be replaced, or else reinstall the wire connection. L8/L9 troubleshooting Step 1: Compressor check Measure the resistance between each two of U, V, W terminals of the compressor, all the resistance should be the same and equal to 0.9~5 Ohms.
  • Page 155 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Guide for compressor replacement Step 1: Remove the compressor from the faulty outdoor unit, pour out the oil from the compressor according to the method illustrated. Normally the oil will flow out from the discharge pipe of the compressor. Step 2: Inspect system oil Normally the oil should be clear and transparent, slightly yellow is also not an indication on any problems.
  • Page 156 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 If the oil has been spoiled The compressor can’t be lubricated effectively. The scroll plate, the crankshaft and the compressor bearings will wear Abrasion leads to larger load, higher current The electric heat will rise and the temperature of the motor becomes increasingly high Leads finally to compressor burnout an damage Worn crankshaft...
  • Page 157 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Step 3: Replace the compressor Pour out some oil from each compressor; check the quality of the oil Oil is dirty Remove all oil from the compressor, oil separator clean and gas-liquid separator Check the filter between the ball valve and the 4-way valve Filter is blocked...
  • Page 158 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 The discharge pipe is connected to the oil pool of the compressor by the inner oil balance pipe; add oil from the discharge pipe with a funnel 4. The type of the oil is FVC-68D, make sure the type of the oil is right because different compressors require different oil type, incorrect oil leads to various problems.
  • Page 159 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz 1 Program input port 2 Power supply indicator lamp 3 Fan motor U, V, W output port 4 Fault indicator lamp 5 PCB control signal input port 6 Signal feedback port *The normal value of output voltage between P and N on fan module is DC 310V P9 protection analysis...
  • Page 160 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 4.25 PL: Temperature protection of main inverter module 4.26 C7: PL protection appears three times in 100 minutes When the temperature of inverter module is over 80 C, it will display PL protection. If the system displays PL protection three times in 100 minutes, the system will stop and display C7 error code.
  • Page 161 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Attached table 1: Resistance characteristics of ambient temperature and pipe temperature sensor Temperature Resistance Temperature Resistance Temperature Resistance Temperature Resistance value (kΩ) value (kΩ) value (kΩ) value (kΩ) 115.266 12.6431 2.35774 0.62973 -20(-4) 20(68) 60(140)
  • Page 162 R410A All DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09 Attached table 2: Resistance characteristics of compressor discharge temperature sensor Temperature Resistance Temperature Resistance Temperature Resistance Temperature Resistance value value (kΩ) value (kΩ) value (kΩ) (kΩ) 542.7 68.66 13.59 3.702 -20(-4) 20(68) 60(140) 100(212) -19(-2.2)
  • Page 163 MCAC-VTSM-2015-09 R410A All DC Inverter V4+S Series 60Hz Attached table 3: Commissioning and operating parameters of refrigerant system Condition 1: Make sure outdoor unit can detect all indoor units, the quantity of indoor units is displayed steadily and is equal to actual quantity of installed indoor units.
  • Page 164 Version Commercial Air Conditioner Business Units Midea Group Add: West Region of Midea Commercial Air Conditioner Department, Industry Avenue, Beijiao, Shunde, Foshan, Guangdong, P. R. China Postal code: 528311 D e a l e r i n f o r m a t i o n Tel: +86-757-26338346 Fax: +86-757-22390205 http://global.midea.com.cn...

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