Midea MIV V4+ Mini Service Manual
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Midea MIV V4+ Mini Service Manual

Midea MIV V4+ Mini Service Manual

Dc inverter r410a
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DM12-01.01.05en
 
 
 
 

Service manual

MIV V4+
Mini
DC INVERTER R410A
(~220V, 50Hz, 1Ph)
MVUH80A-VA1

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  • Page 1: Service Manual

    DM12-01.01.05en         Service manual MIV V4+ Mini DC INVERTER R410A (~220V, 50Hz, 1Ph) MVUH80A-VA1...
  • Page 2 Contents Part 1 General Information ............... 1 Part 2 Outdoor Units ................6 Part 3 Installation ................44  ...

  • Page 3: Part 1 General Information

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) Part 1 General Information 1. Product Lineup ....................2 2. Nomenclature ....................3 3. Features ......................5 General Information...

  • Page 4: Product Lineup

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 1. Product Lineup Outdoor Units Dimension (mm) Model name Net/Gross weight (kg) Power supply Width*Height*Depth MVUH80A-VA1 975*862*355 66/70 220-240V~50Hz General Information...

  • Page 5: Nomenclature

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 2. Nomenclature Outdoor unit: MVUH80A – VA1 Power - 1 phase, 50 Hz - 3 phases, 50 Hz Refrigerant - R410A - R22 Inverter (in)V(erter) - inverter S(tandard) – on/off Model A…Z...
  • Page 6 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en Indoor unit: MVC28A – VA1 Design features (may be absent) For example: G(rey), (hite) – color Power - 1 phase, 50 Hz - 3 phases, 50 Hz Refrigerant - R410A...

  • Page 7: Features

    3. In some large residential spaces or some light commercial space, such as villa, restaurant, usually it need more than one indoor unit, so outside the building are also full of outdoor unit. Now Midea can provide an effective solution-Midea DC inverter mini system. Since now the beauty of the building will be back.

  • Page 8: Table Of Contents

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en Part 2 Outdoor Units 1. Specifications ....................7 2. Dimensions ..................... 8 3. Service Space ....................9 4. Piping Diagrams ................... 10 5. Wiring Diagrams ................... 11 6. Field Wiring ....................12 7.

  • Page 9: Specifications

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 1. Specifications Sale Model MVUH80A-VA1 Power supply V-ph-Hz 220-240, 1, 50 Capacity Cooling Input 2.56 Capacity Heating Input 2.71 Max. input consumption 3766 Max. current 17.3 Model TNB220FLHMC Type Rotary...

  • Page 10: Dimensions

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 2. Dimensions MVUH80A-VA1 Unit:mm MODEL MVUH80A-VA1 Outdoor units...

  • Page 11: Service Space

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 3. Service Space Single unit installation (Wall or obstacle) Air inlet >300 Air inlet Maintain cha nnel >600 Air outlet Fix with bolt Outdoor units...

  • Page 12: Piping Diagrams

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 4. Piping Diagrams MVUH80A-VA1 Electronic Evaporator expansion valve High pressure switch Electronic expansion valve Condenser High pressure liquid accumulator can separator Oil return Capillary Low pressure liquid pressure switch accumulator can REMARK：for reference...

  • Page 13: Wiring Diagrams

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 5. Wiring Diagrams MVUH80A-VA1 Outdoor units...

  • Page 14: Field Wiring

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 6. Field Wiring MVUH80A-VA1 Outdoor units...

  • Page 15: Capacity Tables

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 7. Capacity Tables MVUH80A-VA1 Cooling Indoor temperature(°C WB) Combination Outdoor 14.00 16.00 18.00 19.00 20.00 22.00 24.00 temperat (Capacity ure(°C index) 10.00 7.03 1.18 8.37 1.44 9.71 1.71 10.09 1.75 10.20...
  • Page 16 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 5.94 1.66 7.09 2.14 8.03 2.56 8.14 2.58 8.26 2.59 8.46 2.62 8.69 2.64 35.00 5.94 1.77 7.09 2.27 7.91 2.66 8.03 2.67 8.11 2.68 8.34 2.71 8.54 2.73 37.00 5.94...
  • Page 17 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 10.00 3.77 0.62 4.51 0.73 5.23 0.85 5.60 0.92 5.97 0.98 6.69 1.12 7.43 1.26 3.77 0.62 4.51 0.74 5.23 0.87 5.60 0.94 5.97 1.00 6.69 1.14 7.43 1.28 12.00 3.77...
  • Page 18 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en Heating Indoor temperature(°C DB) Outdoor air Combination temp. (Capacity index) °C DB °C WB -13.7 6.40 2.14 6.37 2.27 6.34 2.39 6.34 2.45 6.31 2.51 6.31 2.64 -11.8 6.66 2.24 6.66...
  • Page 19 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) -9.5 7.06 2.83 7.03 2.91 7.03 3.00 7.00 3.04 7.00 3.08 6.97 3.17 -8.5 -9.1 7.20 2.86 7.17 2.95 7.17 3.03 7.17 3.07 7.14 3.11 7.14 3.19 -7.6 7.46 2.92 7.46...
  • Page 20 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 7.10 1.84 6.70 1.73 6.30 1.62 6.07 1.56 5.87 1.51 5.47 1.40 11.8 7.10 1.74 6.70 1.64 6.30 1.53 6.07 1.48 5.87 1.43 5.47 1.33 13.7 7.10 1.65 6.70 1.55 6.30...

  • Page 21: Electric Characteristics

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 8. Electric Characteristics Outdoor Unit Power Supply Compressor Model Voltage Min. Max. TOCA 220-240 20.5 0.168 0.78 MVUH80A-VA1 Remark: TOCA: Total Over-current Amps. (A) MFA: Max. Fuse Amps. (A) RLA: Rated Locked Amps. (A) OFM: Outdoor Fan Motor.

  • Page 22: Sound Levels

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 9. Sound Levels Noise level dB(A) Model High speed Low speed MVUH80A-VA1 Outdoor units...

  • Page 23: Operation Limits

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 10. Operation Limits Outdoor units...

  • Page 24: Troubleshooting

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 11. Troubleshooting 11.1 Troubles and causes of air conditioner If one of the following malfunctions occur, stop operation, shut off the power, and contact with your dealer. ■ The operation lamp is flashing rapidly (twice every second) This lamp is still flashing rapidly after turn off the power and turn on again.
  • Page 25 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 11.2 Troubles and causes of remote controller Before asking for serving or repairing, check the following points. Symptoms Causes Solution When the automatic mode is selected, the Check whether the MODE indicated air conditioner will automatically change on the display is "AUTO"...
  • Page 26 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 11.3 Malfunction Code of Indoor unit (1) For the Four-way Cassette: Malfunction Operation Timer DEF/FAN Alarm Code LED2 Communication malfunction between in-outdoor unit Quick-flash LED1 Room temperature sensor malfunction Quick-flash...
  • Page 27 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) (3) For the other type indoor unit: Display Contents Malfunction All lamps are off Standing-by Operation lamp is on PRE./DEF. lamp is on Anti-cooling or Defrosting Timer lamp is on...
  • Page 28 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en ① Indoor/outdoor communication malfunction Indoor / outdoor communication alfunction Check communication wire Exist Short circuit or open circuit of (generally measuring resistance communication wire P, Q and E between P, Q and E)
  • Page 29 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) Note: Press the “manual” button on remote control receiver of indoor unit in turn (display the address code of this indoor unit when pressing and holding for 5 seconds (display capacity code when pressing and holding for 10 seconds), check all address codes.
  • Page 30 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en ② Indoor unit’s temp. Sensor malfunction Indoor unit’s temp. Sensor malfunction Exist T1, T2 or T2B Connecting wire Reconnect and ensure between sensor and mainboard that the connection is gets loose reliable.
  • Page 31 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) ③ Mode-confliction malfunction In the below table, “Yes” indicates existing mode conflict, “No” indicates no mode conflict. Cooling Heating Air-supply Cooling Heating Air-supply When indoor unit receiving heating operation instruction, it will transmit the operation mode signal to outdoor...
  • Page 32 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en ⑤ EEPROM malfunction EEPROM malfunction EPROM chip is broken Replace EPROM Check whether the main control chip 9177 is broken Replace EPROM Check PCB board or replace the main control board ⑥...
  • Page 33 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 11.4 Malfunction Code of Outdoor unit Display Malfunction or Protection EEPROM malfunction Communication malfunction between indoor/outdoor units Communication malfunction between DSP/Outdoor units T4 temperature sensors malfunction Outdoor unit voltage protection...
  • Page 34 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 1) E0 malfunction LED indicates E0 EEPROM malfunction Judge 1: Check whether the EEPROM is inserted well Insert the EEPROM well Replace the outdoor main board Outdoor units...
  • Page 35 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 2) E2 malfunction LED indicates E2 Communication malfunction between indoor/outdoor units Judge 1: Check whether the indoor unit power is on Turn on the indoor unit power Judge 2: Check whether the signal wiring is shield...
  • Page 36 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 3) E3 malfunction LED indicates E3 Communication malfunction in outdoor PCB Check whether the indicator lights LED1 or LED2 on the main control board are flashing Replace PCB Install the IC-U3 chip of the PCB over again, check...
  • Page 37 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 4) E4 malfunction LED indicates E4 Judge 1: Outdoor condenser’s middle temp. sensor (T3) is malfunction Check whether the wiring of the condenser’s middle temp. sensor Connect the wiring well is break off Check whether the resistance of condenser’s middle temp.
  • Page 38 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 5) E5 malfunction LED indicates E5 Outdoor unit voltage protection Check the voltage of outdoor unit power supply, whether the Check the power supply voltage between L1 and N is about 198--252V...
  • Page 39 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 6) E6 malfunction LED indicates E6 PFC module protection Check whether the connecting line between main board and the PFC module is Connect it tightly, check normal or connected tightly...
  • Page 40 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 7) P1 malfunction LED indicates P1 High pressure protection Judge 1: Whether the wiring between the high pressure switch Connect it well and main control board is connected well or correctly...
  • Page 41 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 8) P2 malfunction LED indicates P2 Low pressure protection Judge 1: The wiring between the low pressure switch and Connect it well main control board is connected well or correctly...
  • Page 42 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 9) P3 malfunction LED indicates P3 Outdoor unit current protection Replace the filter board, then check whether the system can run normally Judge 1: Check whether the input current of the power supply...
  • Page 43 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 10) P4 malfunction When compressor discharge temperature is more than 115°C, the unit will stop, and unit runs again when compressor discharge temperature is less than 90°C. LED indicates P4 Compressor discharge temperature protection Check whether the compressor discharge temp.
  • Page 44 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 11) P5 malfunction When condenser high temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temp. less than 52°C. LED indicates P5 Condenser high temperature protection Check whether the condenser temperature is more than 65°C...
  • Page 45 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 12) P6 malfunction LED indicates P6 IPM protection Regulate it to correct, Check whether the voltage range of P-N Check whether the input power then check whether on IPM module is normal? DC 310-650V...

  • Page 46: Part 3 Installation

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en Part 3 Installation 1. Summarize of Installation ................45 2. Installation of Indoor Unit ................48 3. Installation of Outdoor Unit ................ 50 4. Installation of Refrigerant Pipe ..............52 5.

  • Page 47: Summarize Of Installation

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 1. Summarize of Installation 1.1 Installation Procedure Installation...
  • Page 48 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 1.2 Install indoor units Procedure: Label installation position Install hooks Install indoor units Confirm installation position Note: (1) The hook must strong enough to sustain the weight of indoor unit.
  • Page 49 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 1.7 Heat-insulation Procedure: Pressure test Heat-insulation work Check the heat-insulated part Refrigerant pipe work Note: For welding part, flare part and branch pipe, heat-insulation work must be done after finished the pressure test.

  • Page 50: Installation Of Indoor Unit

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 2. Installation of Indoor Unit 2.1 Hanging and Transportation Please refer to Indoor unit Installation Manual. 2.2 Required Installation Place 2.2.1 Cassette Type Type One-way Cassette 1000mm above Four-way Cassette...
  • Page 51 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 2.2.4 Ceiling and floor Wall mounting installation: D. Connecting point of refrigerant pipe (D. gas side) Drain point E. Connecting point of refrigerant pipe (E. Liquid side) Hook Ceiling installation: Hanging arm E.

  • Page 52: Installation Of Outdoor Unit

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 3. Installation of Outdoor Unit 3.1 Installation place Please keep away from the following place, or malfunction of the machine may be caused:  There is combustible gas leakage. ...
  • Page 53 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) NOTE All the pictures in this manual are for explanation purpose only. They may be slightly different from the air conditioner you purchased (depend on model).The actual shape shall Prevail.

  • Page 54: Installation Of Refrigerant Pipe

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 4. Installation of Refrigerant Pipe CAUTION To prevent the refrigerant piping from oxidizing inside when welding, it is necessary to charge nitrogen, or oxide will chock the circulation system. 4.1 Length and Drop Height Permitted of the Refrigerant piping...
  • Page 55 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 4.2 Pipe size selection 4.2.1 Selection of the refrigerant pipe Type of the pipe Connecting part Main pipe Between outdoor branch joint and first branch joint Indoor main pipe Between indoor branch joint...
  • Page 56 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 4.2.5 Select the indoor pipe 3: A: the total capacity and the gas side/liquid side pipe of indoor units Pipe diameter (R410A) Liquid pipe Gas pipe Indoor unit capacity（×100W） (mm) (mm) 6.4...
  • Page 57 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 4.3 Refrigerant Amount to be added Calculate the added refrigerant according to the diameter and the length of the liquid side pipe of the outdoor unit/indoor unit connection. Table 6-8...

  • Page 58: Processing & Installation Of Drainage Pipe

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 5. Processing & Installation of Drainage Pipe 5.1 Gradients and Supporting 5.1.1 Keep the drainpipe sloping downwards at a gradient of at least 1/100. Keep the drainpipe as short as possible and eliminate the air bubble.
  • Page 59 DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 5.3 Upward drainage (drain pump) 5.3.1 For Four-way cassette(compact) 5.3.2 For Four-way cassette 5.4 Convergent drainage 5.4.1 The number of indoor units should be as small as possible to prevent the traverse main pipe overlong.
  • Page 60 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 5.5 Drainage test 5.5.1 Drainage without drain pump After finishing drainpipe installation, pour some water into the water plate to check if the water flows smoothly. 5.5.2 Drainage with drain pump 5.5.2.1 Poke the Water Level Switch, remove the cover, and use water pipe to pour 2000ml water into the...

  • Page 61: Insulation Work

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 6. Insulation Work 6.1 Insulation material and thickness 6.1.1 Insulation material Insulation material should adopt the material, which is able to endure the pipe’s temperature: no less than 70℃ in the high-pressure side, no less than 120℃ in the low-pressure side (For the cooling type machine, no requirements at the low-pressure side.)
  • Page 62 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en Insulate for the jointing area, expanding area and the flange area  Insulate for the jointing area, expanding area and the flange area should be done after checking leakage of the pipes ...

  • Page 63: Electric Installation

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 7. Electric Installation CAUTION  Please select power source for indoor unit and outdoor unit respectively The power supply has specified branch circuit with leakage protector and manual switch. ...
  • Page 64 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en Power supply for 1- phase Fig.7-2 CAUTION The reserved function is indicated in broken line table, users can select it when necessary. Indoor/Outdoor Unit Signal Wire Connect the wire according to their numbers.

  • Page 65: Indoor Unit Wiring

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 7.2 Indoor Unit Wiring Power Supply Table 7-2 36000~60000 Capacity (Btu/h) 1- phase Phase 220-240V~ 50Hz indoor Unit power Frequency and Voltage 3-core×1.0 Power Wiring(mm 15/15 Circuit Breaker/Fuse (A) 3-core shielded wire 3X0.5 Indoor unit/Outdoor unit Signal wire (Weak electric signal) (mm 1.
  • Page 66 MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en Indoor/Outdoor unit signal wire wiring Fig.7-4 Installation...

  • Page 67: Test Running

    DM12-01.01.05en MIV V4+ Mini DC Inverter R410A (220V, 8 kW) 8. Test Running Operate according to “gist for test running” on the electric control box cover. CAUTION  Test running can not start until the outdoor unit has been connected to the power for 12hr.

  • Page 68: Precautions On Refrigerant Leakage

    MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en 9. Precautions on Refrigerant Leakage This air conditioner (A/C) adopts innocuous and nonflammable refrigerant. The locating room of the A/C should big enough that any refrigerant leakage is unable to reach critical thickness. So certain essential action can be taken on time.

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