Инструкция на Наружные индивидуальные блоки VRF-системы V4+ (сервис мануалы) бренда MDV

1. Product lineup

2. Nomenclature

3. Features

Wide application range 3.1.1 Wide capacity range The whole product lineup of V4+I series will be from 7HP to 32HP, which is designed to optimize performance and better match varieties of application requirement. Especially, the integrated designed V4+I series is focus on providing better air…

3.1.5 High external static pressure

40 Pa High static pressure propeller and optimized fan guard can adapt to various installation environments. Midea now offers 40Pa* external pressure for customized applications. A standard 0-20Pa function is equipped by default 3.2 High efficiency 3.2.1 High efficiency DC inverter compressor High…

3.3 Enhanced comfort

3.3.1 Intelligent soft start technology DC inverter compressor soft start function reduces strike to the electric network. This kind of high-performance and low sound scroll compressor operates at a faster rate when starting, reducing start-up time. It also helps the unit to quickly adjust the room…

3.4 Easy installation and service

3.4.1 Compact design for effective use of space Easy to transport Compact size and light weight design minimizes the installation footprint, reduces the installation floor load, and easier for transportation. For some projects the units can even be transported through the elevator or forklift…

3.4.4 Auto addressing

Outdoor unit can distribute address for each indoor unit automatically. Wireless and wired controllers can enquire and modify each indoor unit’s address. 3.4.5 Easy maintenance Reserved checking window on electric control box for convenient spot checking and status enquiry. Compressor is located…

4. Indoor units lineup

Cassette type One-way cassette Capacity Two-way cassette Compact four-way cassette Four-way cassette (×100W) ● 15 18 ● 22 ● ● ● 28 ● ● ● ● 36 ● ● ● ● 45 ● ● ● ● 56 ● ● ● ● ● 71 80 ● 90 ● 100 ● 112 ● 140 ● Duct type Low static Capacity pressure duct Medium static pressure duct High static pressure…

Indoor units lineup

Floor-standing/Ceiling & Floor/Console Cased floor-standing Uncased floor-standing Ceiling & floor console 22 ● ● ● 28 ● ● ● 36 ● ● ● ● 45 ● ● ● ● 56 ● ● ● 71 ● ● ● 80 ● ● ● Capacity (×100W) 90 ● 112 ● 140 ● 160 ● Wall mounted/Fresh air processing unit Capacit y Wall mounted Wall mounted Wall…

1. Specifications

Model MDV-730W/DRN1-i(C) MDV-785W/DRN1-i(C) MDV-850W/DRN1-i(C) MDV-900W/DRN1-i(C) Power supply Cooling V-Ph-Hz 380-415/3/50 380-415/3/50 380-415/3/50 380-415/3/50 Capacity kW 73.0 78.5 85.0 90.0 Power input kW 22.3 24.2 28.3 28.5 3.27 3.24 3.00 3.16 EER Heating DC inverter compressor Capacity kW…

Outdoor

fan R410A DC Inverter VRF V4 Plus Individual Series 50Hz Material ASG20 ASG20 ASG20 ASG20 Type Axial fan Axial fan Axial fan Axial fan Quantity mm Diameter mm 562/560 562/560 562/560 562/560 162/189 162/189 162/189 162/189 0-20 (default) 0-20 (default) 0-20 (default) 0-20 (default) 20-40…

2. Dimensions

3. Service space

 Ensure enough space for maintenance. The modules in the same system must be on the same height. .  When the outdoor unit is higher than the surrounding obstacle One row Two rows Specifications & Performances 15

More than two rows

 When the outdoor unit is lower than the surrounding obstacle, refer to the layout used when the outdoor unit is higher than the surrounding obstacle. However, to avoid cross connection of the outdoor hot air from affecting the heat exchange effect, please add an air director onto the exhaust hood…

4. Piping diagrams

Key components

Oil separator: It is used to separate oil from high pressure and high temperature gas refrigerant, which is pumped out from compressor. The separation efficiency is up to 99%, it makes the oil return back to each compressor very soon. Gas-liquid separator: It is used to store the liquid refrigerant…

5. Wiring diagrams and field wiring

Specifications & Performances 19

6. Field wiring

 The control line should be shielded wire. Using other wiring shall create signal interference, thus leading to error operation.  The shielded nets at the two sides of shielded wires are either grounded to the earth, or connected with each other and jointed to the sheet metal along to the earth. …

Power(380-415V, 50Hz)

Specifications & Performances 21

7. Electric characteristics

Units Model Hz Power supply Compressor Voltage Min. Max MCA TOCA MFA MSC (V) (V) (V) (A) (A) (A) (A) MDV-730W/DRN1-i(C) 50 380~415 342 418 55.7 66 70 / MDV-785W/DRN1-i(C) 50 380~415 342 418 58.4 71.5 75 / MDV-850W/DRN1-i(C) 50 380~415 342 418 67.1 77.7 80 / MDV-900W/DRN1-i(C) 50 380~415 342 418 71.3…

8. Capacity tables

Combinatio

таблицы и схемы — в просмотре

Combinatio

таблицы и схемы — в просмотре

8.2 Heating capacity

Combinatio

Combination

таблицы и схемы — в просмотре

9. Sound levels

Front 1.3m 1m 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 such as the construction (acoustic absorption coefficient) of particular room in which the equipment is installed • Sound level can be…

10. Accessories

10.1 Standard accessories Name Shape Quantity Function Outdoor unit installation manual 1 This manual Outdoor unit owner’s manual 1 / Indoor unit owner’s manual 1 / Accessory screw bag 1 Be used in maintenance Toggling flathead screw 1 For toggling of indoor and outdoor units Gauge point subassembly…

Part 3 Selection Procedure

1. Introduction 58 2. Unit selection (based on cooling load) 61 Selection Procedure 57

1. Introduction

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. Selection of an air conditioning system  Design of the control system …

rooms may be considered

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 8~16 indoor units can be connected to one outdoor unit. It is recommended to choose a larger…

H(m)

100% 20 10 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 L(m) L: Refrigerant pipe equivalent length H: Height difference between outdoor and indoor unit. Positive data means outdoor unit is top. Negative data means outdoor unit is down. 1.5.2 Heating capacity modification Modification coefficient of…

2. Unit selection (based on cooling load)

2.1 Given condition Condition: Cooling: indoor temperature 20oCWB, outdoor temperature 35oCDB; Cooling load Location Room A Room B Room C Room D Room E Room F Room G Room H Load (kW) 5.9 5.8 7.5 7.3 7.9 5.5 4.5 7.8 Power supply: outdoor 380~415V-3Ph-50Hz, indoor 220~240V-1Ph-50Hz. Piping length…

2.4 Conclusion

Generally, we think this result is acceptable, so we can think we have accomplished the calculation. But if you think this result is not acceptable, you can repeat the above process. Remark: In this sample, the other capacity modification indexes don’t be considered and are assumed as 1.0. For more…

1. 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 the surrounding ventilation. Ensure that the outdoor unit is installed in a well-ventilated…

R410A DC Inverter VRF V4 Plus Individual Series 50Hz Distance between foot screws is shown as follow. The spacing between the two cement piers shall not be exceeded over than 650mm. Size (mm) 26/28/30/32HP A 2410 B 2540 C 736 D 765 E 950 3. Installation space   Ensure enough space for maintenance.…

 When the outdoor unit is higher than the surrounding obstacle

One row Two rows More than two rows 66 Installation

When the outdoor unit is lower than the surrounding obstacle, to avoid cross connection of the outdoor hot air from affecting the heat exchange effect, please add an air director onto the exhaust hood of the outdoor unit to facilitate heat dissipation. See the figure below. The height of the air…

5. Set the snow-proof facility

Installation in a snowfall area 1. Install the outdoor unit on a higher foundation than the snowfall or set up a stand to install the unit so that snowfall will not affect the unit.  Set up a stand higher than the snowfall.  Apply an angled structure to the stand so that drainage will not be…

Size (mm)

7. Refrigerant piping installation

7.1 Valve instructions (Unit:mm) 70 Installation

7.2 Refrigerant piping length permitted value

Permitted Piping length value Piping length Actual total piping length Maximum piping length difference Actual length 165m Equivalent length 190m Maximum piping length from the first difference between indoor unit and outdoor unit L1+(L2+L3+L4+L5+L6+L7+L8)×2 +a+b+c+d+e+f+g+h+i L1+L5+ L8+L9+j 40/90m…

Increasing size as the following

660≤A<920

Φ31.8 Φ19.1 FQZHN-03D 920≤A<1080 Φ38.1 Φ19.1 FQZHN-04D  Table 3: Main pipe selection (L1) When the equivalent length of all liquid pipes<90m Model 26/28/30/32HP When the equivalent length of all liquid pipes≥90m Gas side (mm) Liquid side (mm) Gas side (mm) Liquid side (mm) Φ31.8 Φ19.1 Φ38.1 Φ22.2…

For the capacity of outdoor unit is 32HP, the equivalent length of all pipes in this system is larger than 90m, refer to table 3, the main pipe L1 is Φ38.1/Φ22.2. As the main pipe L1 is selected as Φ31.8/Φ19.1 from step 2, and Φ31.8/Φ19.1 from step 3, we finally select the larger pipe Φ38.1/Φ22.2 as…

8. Branch pipe installation

The branching pipe must be installed horizontally and error angle of it should not be larger than 10°. Otherwise, refrigerant assignment will be uneven and malfunction will be caused. U-shaped branching pipe A A direction view Wrong Correct 10° 10° Horizontal surface 9. Remove dirt or water in the…

Connect with vacuum pump

Perform the pump (last for 2 hours or above) When get the vacuum level -0.1MPa, the pump should keep running for 20-60 mins Shut down the vaccun pump 1. Close-off the valve of vacuum meter. 2. Cut off the connection between pressure meter and vacuum pump. 3. Close the vacuum pump. Place the vaccum…

14. Electric wiring installation

14.1 Wiring terminals instruction A B C N Three-phase power supply 14.2 Electric wiring installation Note: Please select power supply for indoor unit and outdoor unit separately. The power supply should have specified branch circuit with leakage protector and manual switch. The power supply, leakage…

14.2.2 Indoor unit powering supply wiring

Note:  Set refrigerant piping system, signal wires between indoor units and signal wires between outdoor units into one system.  Power must unified supply to all indoor units in the one system.  Please do not put the signal wires and power wires in the same wire tube; keep distance between the…

14.3.2 Example connection of wiring

1.4.3.3 Signal wire of centralized control Signal wire of centralized control When centralized control is needed, one CCM03 (central controller of indoor unit) can only control the indoor units which are in the same refrigerant system via the port X Y E of outdoor unit. Outdoor unit will…

Besides, CCM03 can also connect indoor units via the port X Y E of indoor unit. However, one more group of wire(X Y E between indoor units) is needed; it is more complex and not suggested. Anyway, the diagram below shows the connection of signal wire in this case: 15. Running test 15.1 Inspection…

Model(indoor unit)

Room Name Eg: Indoor unit (A) of the first system on second floor is recorded as:-2F-1A 15.4 Caution on refrigerant leakage  This air conditioner adopts R410A as refrigerant, which is safe and noncombustible.  The room for air conditioner should be big enough that refrigerant leakage cannot reach…

1. Outdoor electric control box assembly instructions

1.7 1.9 1.12.1 1.13 1.12.2 1.5 1.12.3 1.10 1.1 1.4 1.8 1.6 1.3 1.11 1.14 1.2 2.2 2.5 Troubleshooting 2.4 2.3 2.1 83

NO

Content 1.1 Power transformer 1.2 Terminal block 1.3 Transformer 1.4 Outdoor main control board ass’y 1.5 Thermal resistance 1.6 Filter board 1.7 Main control box ass’y 1.8 Reactance 1.9 Cement type resistor 1.10 Contactor 1.11 Current detection board ass'y 1.12 Inverter module radiator ass’y 1.12.1…

2. Main board ports instructions

Troubleshooting 85

Main board ports instruction

No. Content 1 Discharge temp. sensed port of the inverter compressor 19 Null line terminal 2 Discharge temp. sensed port of the No.1 fixed compressor 20 Low speed output terminal of Fan 4 3 Discharge temp. sensed port of the No.2 fixed compressor 21 High speed output terminal of Fan 4 4 Discharge…

3. Main board parts instructions

3.1 SW1 Constraint Cooling Once pressing the constraint cooling button (see the chart on the right), all the indoor unit will be on forced cooling mode and the wind speed is HIGH. 3.2 SW2 query instructions: No. Normal display 1 Display content(Current frequency) Note 0-- Outdoor unit address 0 2…

10-- Speed of fan B 12 11-- T2B/T2 average Temp. Actual value 13 12-- T3 pipe Temp. Actual value 14 13-- T4 ambient Temp. Actual value 15 14-- Discharge Temp. of inverter compressor Actual value 16 15-- Discharge Temp. of No.1 fixed compressor Actual value 17 16-- Discharge Temp. of No.2 fixed…

3.3 System setting dial switches instructions

Outdoor address dial switch Outdoor power SW2:Query dial switch button Quantity setting dial switch of indoor units SW1:Constraint cooling Outdoor NET. address dial switch S1 definition Starting time is set about 5 minutes Starting time is set about 12 minutes(Default the Factory Set) S2 definition…

Silent mode Night time selection is 8h/10h Reserve Night time selection is 8h/12h None Silent mode S4 definition Static pressure mode is 0 MPa (Default the Factory Set) Static pressure mode is low pressure(Reserve position, use for customized unit) Static pressure mode is medium pressure(Reserve…

S8 definition

S10 definition reserve reserve ENC1 definition ENC2 definition Outdoor unit address setting switch Effective to 0-3, 0 Stand for main unit, 1-3 Stand for slave unit Outdoor unit capacity setting switch Effective to 9-C, 9-C Stand for 26HP~32HP ENC3 &S12 definition Setting the numbers of indoor unit…

3.3 Function setting dial switches instructions

LED3 LED2 LED1 LED5 LED4 LED1: Power supply indicator lamp of network centralized control chip. The lamp will be on if the power supply is normal. LED2: Running indicator lamp of network centralized control chip. The lamp will be on if the system running is normal. LED3: Malfunction indicator lamp…

E3 Reserve 5 E4 Outdoor Temp. sensor error 6 E5 Low-voltage power protection 7 E6 Reserve R410A DC Inverter V4 Plus 50Hz Air discharge<15 degree, at the same time 8 E7 Discharge Temp. sensor error pressure higher than 3.0MPa, then will alarm, need to power off for recovery 9 E8 Reserve 10 H0 COMM.…

L4 MCE error/synchronization/closed-loop 36 L5 Zero-speed protection 37 L6 Reserve 38 L7 Phase sequence error 39 L8 Frequency change over 15Hz one time 40 L9 Setting & actual frequency over 15Hz 41 dF Defrosting(DSP1:Df,DSP2:frequency) 42 d0 Oil returning(DSP1:d0,DSP2:frequency) 43 r1 Lack of…

5.2 E1: Phase sequence error (Display on faulty unit, all the ODU in standby)

E1: Phase sequence error The 3-phase sequence of power supply is wrong. (The A, B, C terminal of three-phase power supply should meet compressor phase sequence requirement. If the phase sequence is adverse, the compressor will operate inversely. Yes Exchange any two of the 3-sequence No Some power…

5.3 E2: Indoor units and master unit communication error (Only display on master unit, all the ODU

in standby) E2: Indoor units and master unit communication error Signal wires P, Q, E are short circuit or disconnected (Measure the resistance among P, Q and E, the normal resistance is 120Ω) Yes Reconnect the signal wires Yes Connect the signal wires in line shape Yes Ensure the signal wires and…

1. Pressing the manual button continued for 5 seconds, it will display the indoor units communication address. LED light Operation Timer DEF./FAN Alarm Code Communication address Four LED display Buzzer not warning 00---15 Normally on Buzzer not warning 16---31 Flash Buzzer warning 32---47 Normally…

For example

Pressing the manual button continued for 10 seconds:  If all the LED lights turn off, that means the capacity code is 0 and the capacity of indoor units is 22×100W(0.8HP);  If the “Timer” and “Alarm” lights are normally on, that means the capacity code is 5=(4＋1) and the capacity of indoor unit is…

5.4 E4: Pipe temperature T3/Ambient temperature sensor (T4) error (Display on faulty unit, all the

ODU in standby) E4: Pipe temperature T3/Ambient temperature sensor (T4) error T3/T4 port on board is loose main Yes Fasten the T3/T4 port No T3/T4 sensor is short circuit or disabled (Using a multimeter to measure resistance, if the resistance is too small, the sensor is short circuit, if the…

5.5 H0/H1

H0: IR341 and MC9S08AC128 communication error (Display on faulty unit, all the ODU in standby) H1: 0537 and MC9S08AC128 communication error (Display on faulty unit, all the ODU in standby) IR341 chip: IR 341chip is used for inverter compressor drive. 0537 chip: 0537chip is used for control the…

5.6 H6: Quantity of indoor units decrease error (Only display on master unit, all the ODU in standby) “H7” error will display when the quantity of indoor units decrease above 3 minutes. H7: Quantity of indoor units decrease error Communication terminals P Q E are loose Yes Fasten the communication…

5.7 H8: High pressure sensor error

When the discharge pressure is lower than 0.3MPa, the system will display H8 error, the ODU in standby. When the discharge pressure is back to normal, H8 disappears and normal operation resumes. H8: High pressure sensor error Yes High pressure sensor connection port on main board is loose Fasten the…

5.8 P0/P4/H6: High temperature protection (Display on faulty unit, all the ODU in standby)

P0: Inverter compressor top temperature protection When the top temperature is over 120℃, the operation will stop, when the temperature goes back to normal range, P0 disappear and normal operation resumes. P4: High discharge temperature protection When the discharge temperature of any compressor is…

5.9 P1: High pressure protection (Display on faulty unit, all the ODU in standby)

When the pressure is over 4.4MPa, the system will display P1 protection, all the ODU in standby. When the pressure is lower than 3.2MPa, P1 disappearing and normal operation resumes. P1: High pressure protection The high pressure sensor is disabled Replace the high pressure sensor Yes No The heat…

5.10 P2/H5: Low pressure protection (Display on faulty unit, all the ODU in standby)

When the pressure is lower than 0.05MPa, the system will display P2 protection, all the ODU in standby. When the pressure is higher than 0.15MPa, P2 disappear and resumes normal operation. H5 error will display when system appear 3 times P2 protection in 60 minutes, it cannot resume automatically…

5.11 P3/XP7/P8: Compressor current protection (Display on faulty unit, all the ODU in standby)

P3: Current protection of inverter compressor When the current of inverter compressor is over12A, the system will display P3 protection, all the ODU in standby. When the current goes back to normal range, P3 disappear and normal operation resumes. P3/XP7/P8: Compressor current protection The indoor…

5.12 P5: Condenser temperature T3 protection (Display on faulty unit, all the ODU in standby)

When condenser temperature is over 65℃, the system will display P5 protection, all the ODU in standby. When the temperature goes back to normal range, P5 disappear and normal operation resumes. P5: Condenser temperature protection Yes T3 port on Main board is loose Fasten the T3 port No Yes ① T3…

5.13 P6/H4: Inverter module protection (Display on faulty unit, all the ODU in standby)

If the system display three times P6 protection in 60 minutes, the system will stop and display H4 error code. When the system displays H4 error code, the system can resume only by restarting the machine. At this time, malfunction should be disposed promptly to avoid further damage. H4 will display…

DC generatrix check

1) Check the voltage of DC generatrix, the normal value should be 510 to 580V. If the value is less than 510V, go to next step. 2) Check the wiring connection of rectifier circuit, find out any loose in the circuit, and check the filter board, single-phase rectifier stack, and three-phase rectifier…

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…

5.14.2 L1/L4 troubleshooting

Step 1: Check the DC voltage between P and N terminal, the normal value should be 510V~580V, if the voltage is lower than 510V, 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. 3-Phase…

Attached table 1

Resistance value of ambient temperature and pipe temperature sensor Temperature (℃) Resistance value (kΩ) Temperature (℃) Resistance value (kΩ) Temperature (℃) Resistance value (kΩ) Temperature (℃) Resistance value (kΩ) -20 115.266 20 12.6431 60 2.35774 100 0.62973 -19 108.146 21 12.0561 61 2.27249…

Attached table 2

Resistance value of compressor discharge temperature sensor Temperature (℃) Resistance value (kΩ) Temperature (℃) Resistance value (kΩ) Temperature (℃) Resistance value (kΩ) Temperature (℃) Resistance value (kΩ) -20 542.7 20 68.66 60 13.59 100 3.702 -19 511.9 21 65.62 61 13.11 101 3.595 -18 483 22…

Attached table 3: Commissioning and operating parameters of refrigerant system

Conditions 1: Make sure outdoor unit can detect all the indoor units, the quantity of indoor units display steadily and be equal to actual quantity of installed indoor units. Conditions 2: Make sure all the valves in outdoor unit are open, indoor units EXV have connected to indoor PCB. Conditions 3…

Инструкция на Наружные индивидуальные блоки VRF-системы V4+ (сервис мануалы)

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