Related Manuals for Midea MDV-120W/DON1
Summary of Contents for Midea MDV-120W/DON1
- Page 1 Technical Service Manual Mini VRF Model: 1 phase, 220-240V, 50Hz & 1 phase, 208-230V, 60Hz MDV-120W/DON1 MDV-140W/DON1 MDV-160W/DON1...
- Page 2 Contents Part 1 General Information ..............1 Part 2 Specifications & Performances ..........9 Part 3 Installation ................44 Part 4 Troubleshooting ..............58 Manufacture reserves the right to discontinue, or change at any time, specifications or designs without notices and without incurring obligations.
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Page 4: Part 1 General Information
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF Part 1 General Information 1. Product Lineup ....................2 2. Nomenclature ....................3 3. Features ......................4 4. Indoor Units Lineup ..................7 General Information... -
Page 5: Product Lineup
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 1. Product Lineup Outdoor Units Model name Dimension body(mm) Net/Gross weight (kg) Power supply Width:900 220-240V~50Hz MDV-120W/DON1 Height:1327 95/105 208-230V~60Hz Depth:400 Width:900 220-240V~50Hz MDV-140W/DON1 Height:1327 99/109 208-230V~60Hz Depth:400 Width:900 220-240V~50Hz MDV-160W/DON1 Height:1327 100/110... -
Page 6: Nomenclature
M D V - 120 W / D O N1 Refrigerant type N1:R410A Power Supply O: 220-240V~50Hz & 208-230V~60Hz Inverter Type D: DC Inverter W: Outdoor unit Cooling Capacity (×100W)* Midea *Note: the actual cooling capacity please refer to the nameplate. General Information... -
Page 7: Features
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 3. Features 3.1 High efficient DC inverter compressor At the heart of Mini VRF system is a high efficiency twin rotary compressor. It enables the outdoor output to be modulated by the cooling or heating demands of the control area, ensures precise temperature regulation and highly efficiency energy usage. - Page 8 In some large residential and light commercial areas, such as villas, restaurants, usually it need more than one indoor unit, which in turn requires multiple outdoor units. Midea's Mini VRF system solves this problem, and retains buildings' original aesthetics. General Information...
- Page 9 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 3.7 Auto Addressing Outdoor unit can distribute addresses for indoor units automatically. Wireless and wired controllers can query and modify each indoor unit's address. 3.8 More Convenient Piping Connector – Branch Box Easier and safer installation thanks to a branch box that simplifies piping work and the adoption of screw connection.
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Page 10: Indoor Units Lineup
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 4. Indoor Units Lineup Cassette type Compact four-way One-way cassette Two-way cassette Four-way cassette cassette Capacity (×100W) ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●... - Page 11 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 Wall mounted Wall mounted Wall mounted Wall mounted Capacity (S panel) (C panel) (R panel) (×100W) ● ● ● ● ● ● ● ● ● ● ● ● ● ● Note: If ODU connect only one IDU, the capacity of IDU should be not more than ODU. If ODU connect more than one IDU, the capacity of each IDU should be not more than 8kW for refrigerant uniform distribution.
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Page 12: Table Of Contents
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF Part 2 Specifications & Performance 1. Specifications ....................10 2. Dimensions ....................12 3. Service Space ....................13 4. Piping Diagrams ................... 14 5. Wiring Diagrams ..................15 6. Field Wiring ....................16 7. -
Page 13: Specifications
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 1. Specifications Sale Model MDV-120W/DON1 MDV-140W/DON1 MDV-160W/DON1 Power supply V-Ph-Hz 220-240V~50Hz & 208-230V~60Hz Capacity 12.5 14.0 16.0 Cooling Input 3.31 3.95 4.66 kW/ kW 3.78 3.54 3.43 Capacity 14.0 16.0 17.5 Heating Input 3.68... - Page 14 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 2800 3200 3800 Charged volume Electronic expansion valve Throttle type 4.4/2.6 Design pressure Ф9.53/Ф15.9 Ф9.53/Ф15.9 Ф9.53/Ф19.1 Liquid side/ Gas side Max. refrigerant pipe Refrigerant length piping Max. difference level between indoor units ℃ Cooling: -15 to 46;...
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Page 15: Dimensions
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 2. Dimensions Unit:mm MODEL 120/140/160 1327 Specifications & Performance... -
Page 16: Service Space
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 3. Service Space Unit: mm Single unit installation (Wall or obstacle) Air inlet >300 Maintain channel Air inlet >600 Air outlet Parallel connect the two units or above >300 >600 >2000 Parallel connect the front with rear sides >2000 >500 >3000... -
Page 17: Piping Diagrams
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 4. Piping Diagrams pressure switch High Discharge pressure temperature switch sensor Ambient 4-way temperature valve sensor seperator seperator Compressor Condenser temperature sensor Electronic expansion pressure valve liquid accumulator DC fan return motor capilary Oil separator: used to separate oil from high pressure &... -
Page 18: Part 2 Specifications & Performances
R410A All DC Inverter Mini VRF MCAC-VTSM-2016 02 5. Wiring diagrams Specifications & Performances... -
Page 19: Field Wiring
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 6. Field Wiring Power (220-240V~ 50Hz 1-Phase) Power (220-240V~ 50Hz 1-Phase) (208-230V~ 60Hz 1-Phase) (208-230V~ 60Hz 1-Phase) Switch / Circuit breaker Switch / Circuit breaker Power wiring Power wiring wire distribution box (indoor) (outdoor) in broken line table, users can purchase the Central control montior when necessary. -
Page 20: Capacity Tables
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 7. Capacity Tables MDV-120W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 11.0 1.35 13.1 1.65 15.2 1.77 15.7 1.84 16.5 1.90 16.9... - Page 21 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-120W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 1.14 11.1 1.42 12.8 1.69 13.7 1.82 14.6 1.96 15.7 2.03 16.1 2.09 1.16...
- Page 22 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-120W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 0.92 1.10 10.6 1.30 11.3 1.42 12.0 1.51 13.5 1.74 15.0 1.99 0.93 1.12...
- Page 23 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-120W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 0.72 0.85 0.96 1.03 1.10 10.5 1.26 11.7 1.45 0.73 0.85 0.97 1.05 1.12...
- Page 24 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-120W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 0.53 0.62 0.71 0.74 0.78 0.89 0.96 0.54 0.63 0.72 0.75 0.80 0.90 0.97...
- Page 25 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-120W/DON1 Heating Indoor temperature(° C WB) Outdoor Air Combination temperature(° C (Capacity index) ° C DB ° C WB -13.7 9.95 2.91 9.91 3.08 9.87 3.25 9.87 3.33 9.82 3.41 9.82 3.58 -11.8 10.36...
- Page 26 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-120W/DON1 Heating Indoor temperature(° C WB) Outdoor Air Combination temperature(° C (Capacity index) ° C DB ° C WB -13.7 9.82 3.58 9.78 3.71 9.73 3.84 9.73 3.91 9.73 3.97 9.69 4.10 -11.8 10.22...
- Page 27 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-120W/DON1 Heating Indoor temperature(° C WB) Outdoor Air Combination temperature(° C (Capacity index) ° C DB ° C WB -13.7 9.67 4.26 9.62 4.35 9.62 4.44 9.45 4.38 9.13 4.20 8.51 3.85 -11.8 10.07...
- Page 28 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-140W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 12.3 1.61 14.6 1.97 17.0 2.11 17.7 2.20 18.5 2.26 18.9 2.46 19.4 2.47 12.3 1.61...
- Page 29 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-140W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 10.4 1.36 12.4 1.70 14.5 2.02 15.5 2.17 16.5 2.34 17.7 2.43 18.1 2.50 10.4 1.39...
- Page 30 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-140W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 1.10 10.2 1.31 11.8 1.55 12.6 1.69 13.4 1.80 15.0 2.07 16.7 2.37 1.11 10.2 1.33...
- Page 31 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-140W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 0.86 1.01 1.14 1.23 10.4 1.31 11.7 1.50 13.0 1.72 0.87 1.01 1.15 1.25 10.4 1.33...
- Page 32 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-140W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 0.64 0.74 0.85 0.89 0.94 1.06 1.15 0.64 0.75 0.86 0.90 0.95 1.08 1.16 0.65 0.77...
- Page 33 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-140W/DON1 Heating Indoor temperature(° C WB) Outdoor Air Combination temperature(° C (Capacity index) ° C DB ° C WB -13.7 11.38 3.42 11.33 3.61 11.28 3.81 11.28 3.90 11.23 4.01 11.23 4.20 -11.8 11.84 3.57 11.84...
- Page 34 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-140W/DON1 Heating Indoor temperature(° C WB) Outdoor Air Combination temperature(° C (Capacity index) ° C DB ° C WB -13.7 11.23 4.21 11.17 4.36 11.12 4.51 11.12 4.59 11.12 4.66 11.07 4.81 -11.8 11.68 4.33 11.68...
- Page 35 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-140W/DON1 Heating Indoor temperature(° C WB) Outdoor Air Combination temperature(° C (Capacity index) ° C DB ° C WB -13.7 11.05 5.00 11.00 5.11 11.00 5.22 10.79 5.14 10.44 4.93 9.73 4.52 -11.8 11.50 5.09 11.50...
- Page 36 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-160W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 14.0 1.90 16.7 2.32 19.4 2.49 20.2 2.59 21.1 2.66 21.6 2.90 22.2 2.92 14.0 1.90...
- Page 37 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-160W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 11.9 1.61 14.2 2.00 16.5 2.39 17.6 2.56 18.8 2.76 20.2 2.86 20.6 2.95 11.9 1.64...
- Page 38 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-160W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 1.29 11.6 1.55 13.5 1.83 14.4 2.00 15.3 2.13 17.2 2.44 19.1 2.80 1.31 11.6 1.57...
- Page 39 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-160W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 1.02 1.19 10.5 1.35 11.2 1.45 11.9 1.55 13.4 1.77 14.9 2.04 1.03 1.20 10.5 1.36...
- Page 40 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-160W/DON1 Cooling Indoor temperature(°C DB/WB) Combination Outdoor DB:20.8,WB:14 DB:23.3,WB:16 DB:25.8,WB:18 DB:27,WB:19 DB:28.2,WB:20 DB:30.7,WB:22 DB:32,WB:24 temperature (Capacity (° C DB) index) 0.75 0.87 1.00 1.05 1.11 1.26 10.6 1.36 0.76 0.89 1.01 1.06 1.13 1.28 10.6 1.38...
- Page 41 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-160W/DON1 Heating Indoor temperature(° C WB) Outdoor Air Combination temperature (° C (Capacity index) ° C DB ° C WB -13.7 12.44 3.89 12.39 4.12 12.33 4.34 12.33 4.45 12.28 4.56 12.28 4.79 -11.8 12.94 4.06...
- Page 42 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF MDV-160W/DON1 Heating Indoor temperature(° C WB) Outdoor Air Combination temperature (° C (Capacity index) ° C DB ° C WB -13.7 12.28 4.79 12.22 4.96 12.17 5.14 12.17 5.23 12.17 5.31 12.11 5.48 -11.8 12.78 4.93...
- Page 43 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 MDV-160W/DON1 Heating Indoor temperature(° C WB) Outdoor Air Combination temperature (° C (Capacity index) ° C DB ° C WB -13.7 12.08 5.70 12.03 5.82 12.03 5.94 11.81 5.85 11.42 5.62 10.64 5.15 -11.8 12.58 5.80...
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Page 44: Electric Characteristics
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 8. Electric Characteristics Power Supply Compressor Model Min. Max. Voltage TOCA 220-240 37.5 15.77 2×0.1 2×0.9 MDV-120W/DON1 208-230 37.5 15.77 2×0.1 2×0.9 220-240 37.5 15.77 2×0.1 2×0.9 MDV-140W/DON1 208-230 37.5 15.77 2×0.1 2×0.9 220-240 37.5... -
Page 45: Sound Levels
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 9. Sound Levels Model Noise level dB(A) Height (m) MDV-120W/DON1 MDV-140W/DON1 MDV-160W/DON1 Specifications & Performance... -
Page 46: Operation Limits
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 10. Operation Limits Cooling Heating Indoor temperature ( DB) Indoor temperature ( WB) Mode Outdoor temp. Indoor temp. Room relative humidity Cooling mode -15° C ~ 46° C 17° C ~ 32° C below 80% ───... -
Page 47: Part 3 Installation
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 Part 3 Installation 1. Precautions ....................45 2. Accessories ....................46 3. Outdoor Unit Installation ................47 4. Piping Installation ..................49 5. Electric Wiring Installations ................. 53 6. Outdoor Unit Wiring ..................56 7. -
Page 48: Precautions
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 1. Precautions Ensure that all Local, National and International regulations are satisfied. Read this “PRECAUTIONS” carefully before Installation. The precautions described below include the important Items regarding safety. Observe them without fail. ... -
Page 49: Accessories
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 If the air conditioner is not installed appropriately, accidents may occur due to the falling unit. Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make sure the air conditioner uses an exclusive power supply. An insufficient power supply capacity or inappropriate installation may cause fire. -
Page 50: Outdoor Unit Installation
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 3. Outdoor Unit Installation 3.1 Installation space selection Install the outdoor unit at a place where discharge air is not blocked. When an outdoor unit is installed in a place that is always exposed ... - Page 51 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 Fix with bolt Single unit installation (Wall or obstacle) Air inlet >300 Maintain channel Air inlet >600 Air outlet Parallel connect two units or above >300 >600 >2000 Parallel connect the front with rear sides >2000 >500 >3000...
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Page 52: Piping Installation
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 3.3 Water Outlet Four condensed water outlets on the chassis for selection display as the follow figure: While installing the outdoor unit, pay attention to the installation place and the drainage pattern; if it’s installed at the alpine zone, the frozen condensed water will block up the water outlet, please pull out the rubber stopper of the reserve water outlet. - Page 53 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 Note: When the total equivalent piping length of liquid + gas side is ≥90m, it must increase the size of air side main pipe. Besides, according to the distance of refrigerant pipe and the over matched state of indoor unit, when the capacity is decreasing it still can increase the gas side main pipe size.
- Page 54 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 4.3 Refrigerant pipe selection The first connecting method Outdoor Unit The first Line Branch Pipe The second connecting method Outdoor Unit(Take Model 160 for example) (28) intdoor Units (28) (28) The first Line Branch Pipe (28) (28) (22)
- Page 55 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 Table 2: Indoor unit main pipes selection (L1~L5) Total capacity of Main pipe size(mm) downstream indoor units Branch Pipe Gas pipe Liquid pipe (kW) Φ15.9 Φ9.53 A＜16.6 FQZHN-01D 16.6≤A＜23 Φ19.1 Φ9.53 FQZHN-01D Table 3: Main pipes selection (L1) When the equivalent length of all liquid and air When the equivalent length of all liquid and air Total capacity of...
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Page 56: Electric Wiring Installations
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 4.7 Additional refrigerant charge Calculate the added refrigerant according to the diameter and the length of the liquid side pipe of the outdoor unit/indoor unit connection. Liquid Side Piping Diameter Refrigerant to be Added Perimeter Piping Φ6.4 0.022kg Φ9.53... - Page 57 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 9) When connecting wiring and wire holder, use cable clamp to fix and make sure no exposure. 10) Refrigerant piping system and wiring system of indoor and outdoor unit belongs to the different system. 11) Do not connect the power wire to the terminal of signal wire.
- Page 58 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 5.4 Indoor unit power supply wiring Indoor Power Supply Circuit Breaker Manual swtich Wire Distribution Box Indoor Unit 5.5 Indoor/Outdoor unit signal wire wiring Note: Refrigerant piping system, indoor unit-indoor unit connection signal wires and indoor unit-outdoor unit connection signal wire are in the same system.
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Page 59: Outdoor Unit Wiring
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 6. Outdoor Unit Wiring The Specification of Power Table 6-1 Capacity 120 model 140 model 160 model Phase 1 phase 1 phase 1 phase Voltage and 220-240V~50Hz & 208-230V~60Hz Outdoor Unit power Frequency Power Wire size must comply with local codes Wiring(mm... -
Page 60: Test Running
MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 7. Test Running Operate according to “key points for test running” on the electric control box cover. CAUTION Test running cannot start until the outdoor unit has been connected to the power for 12hours. ... -
Page 61: Part 4 Troubleshooting
R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 Part 4 Troubleshooting 1. PCB Ports Instructions ................59 2. PCB Parts Instructions ................60 3. Function Setting Dial Switches Instructions ..........61 4. Error Code Table ..................62 5. Troubleshooting ..................63 Troubleshooting... - Page 62 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 1. PCB Ports Instructions 18 17 PCB ports instruction Content Port voltage 1 CN2 AC Power input AC 220V 2 CN1 AC Power input AC 220V 3 CN22 EXV activation port DC 12V 4 CN30 Communication port between indoor units DC 2.5V-2.7V...
- Page 63 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 2. PCB Parts Instructions 24LC256 UPD78F0537A SW2: Query button SW1: Forced cooling button LED digital tube display SW3: Priority SW4: Function mode setting SW2 query instructions Content Note Frequency will display when running, quantities of indoor Normal display unit will display when standby.
- Page 64 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 3. Function Setting Dial Switches Instructions SW3 definition: Priority mode SW4 definition: Function setting Auto addressing Heating priority mode （Factory default） Manual addressing Cancel addressing Cooling priority mode First running priority mode Only response to heating mode Only response to cooling mode Troubleshooting...
- Page 65 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 4. Error Code Table Error code Content Communication malfunction between the indoor unit and outdoor unit Pipe temperature T3& ambient temperature T4 sensor malfunction Outdoor unit voltage protection DC fan malfunction Discharge temperature sensor malfunction EEFROM malfunction E.9.
- Page 66 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 5. Troubleshooting 5.1 H0: Communication malfunction between IR341 and main chip on the main PCB. IR341 chip: it is used for inverter compressor drive. 0537 chip: it is used for control the communication between indoor unit and outdoor unit, and the communication between outdoors.
- Page 67 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 5.2 E2: Communication malfunction between indoor unit and outdoor unit. LED displays E2 Communication malfunction between indoor unit chip and outdoor unit chip. Check whether the indoor unit is power on. Plug the indoor unit in. Check whether the three-cored shielded Replace shielded wire or earth the wire wire is used as the communication wire and...
- Page 68 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF Press the button for 5 seconds: If the “running” and “warning” lights are normally on, that means the address code is 9=(8＋1) If the lights are blink, the address code should plus 16, so the address code is 25=16＋(8＋1) Press the button for 10 seconds: If the “timer”...
- Page 69 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 5.3 E4: Pipe temperature T3& ambient temperature T4 sensor malfunction displays Pipe temperature T3& ambient temperature T4 sensor malfunction Whether the wire body is broken. Connect the wire again. Judge whether temperature sensor pin connects Connect again.
- Page 70 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 5.4 E5: Voltage protection malfunction (for all models) displays Voltage protection malfunction Whether the input voltage is 180-260V. Check the power supply. Replace the filter board and check whether the unit can operate normally. Replace the main PCB Troubleshooting...
- Page 71 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 5.5 E6/Eb: DC Fan Malfunction If the system display twice E6 in 10 minutes, the system will stop and display E8/Eb. When the system displays E8/Eb, the system can resume only by restarting the machine. At this time, malfunction should be disposed promptly to avoid further damage.
- Page 72 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 5.6 E7: Discharge Temperature Sensor Malfunction displays Discharge sensor malfunction. Check whether discharge temperature sensor’s head is inside the sleeve or its wiring is connected to the main PCB Connect again. properly. Check whether the discharged sensor is normal. ①...
- Page 73 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 5.7 E9: EEPROM malfunction The malfunction may be caused by two reasons: 1) The EEPROM is not inserted well; 2) Outdoor main board is broken. LED display E9/E0 EEPROM malfunction Check whether the EEPROM is inserted well. Insert the EEPROM well Replace outdoor main PCB.
- Page 74 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 5.8 EA: Fan error in A region last for more than 5 minutes in heating mode. LED displays EA/E7 System faulty that T3 pipe temperature exceeds 27 degrees for more than 5 minutes when heating mode. Belongs to system Whether the outdoor ambient temperature is higher than the unit’s operating condition when heating mode.
- Page 75 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 5.9 P1: High pressure protection displays High pressure protection Whether the wiring is correct. Connect again. Whether the wire body is broken. Short-circuit high pressure switch. Check whether the Replace the high pressure system can operate normally.
- Page 76 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 5.10 P2: Low pressure protection When the pressure is lower than 0.05MPa, the system will display P2 protection, the ODU in standby. When the pressure is higher than 0.15MPa, P2 disappears and resumes normal operation. displays Low pressure protection Whether wiring connection between low pressure switch and...
- Page 77 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 5.11 P3: Input current protection It will protect when input current is more than 30A. It will recover when input current is less than 30A. It will recover automatically. LED displays P3 Input current protection Check whether the input current of the power wire is more than 30A.
- Page 78 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 5.12 P4: Compressor discharged temperature protection When the discharged temperature of the compressor is higher than 115° C, the unit will stop running. When the discharged temperature of the compressor is lower than 90° C , the unit resumes normal operation automatically.
- Page 79 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 5.13 P5: Condenser high temperature protection When condenser temperature is higher than 62 degrees for 3 seconds, the unit will stop operating. When pipe temperature outside is lower than 52 degrees, the unit will resume operate. LED displays P5 Condenser T3 high temperature protection Check whether condenser temperature is higher than...
- Page 80 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 5.14 P6: IPM module protection P6 code can display on digital tube automatically. L0~L9 these error codes will display on digital tube only through check button. L0~L9 is only display on the 80/105 model but not on 120~160 model. Check module and L0: module protection compressor...
- Page 81 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 DC generatrix check Direction of the current in DC supply wire is running through the inductor should be the same as the direction of arrow marked on the inductor Check the voltage of DC generatrix, the normal value should be 296 to 324V. If the value is less than 296V, go to next step.
- Page 82 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 5.14.1 L0/L8/L9 troubleshooting Step 1: Replace the modular with correctly wire connection and start the system, if system is still malfunction, then go to step2 to check the compressor. Step 2: Take out the compressor from the malfunction system, short-circuit the suction and the discharge, vacuum dry and charge 0.3kg~0.4kg R410A, and then connect the U,V,W terminals to control box B which is took apart from normal system.
- Page 83 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 5.14.2 L1/L4 troubleshooting Step 1: Check the DC voltage between P and N terminal, the normal value should be 310V~380V, if the voltage is lower than 310V, go to step 2. Step 2: Check whether the wires of rectifier circuit are loose or not. If wires are loosen, fasten the wires. If wires are OK, replace the PCB.
- Page 84 MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF 5.15 PE malfunction: Evaporator T2 high temperature protection When the middle average temperature of the evaporator is higher than 63 degrees for 50 seconds, the unit will stop operating. When pipe temperature is lower than 50 degrees, the unit will resume running.
- Page 85 R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02 5.16 P8: Typhoon protection displays Typhoon protection When air conditioner is standby or in malfunction Belongs to normal protection stopping status, check if there is strong air blows the fan phenomenon. Check whether the fan motor is normal. Replace fan motor.
- Page 86 Commercial Air Conditioner Division Midea Group Address: Midea Headquarters Building, 6 Midea Avenue, Beijiao, Shunde, Foshan, Guangdong, China Midea CAC After-service Application Midea CAC News Application Postal code: 528311 Tel: +86-757-26338346 Fax: +86-757-22390205 cac.midea.com global.midea.com Note: Product speci cations change from time to time as product improvements and...
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