Midea V5 X VRF Series Operating manual

Model:
Technical Service Manual
V5 X Series VRF
3 phase, 380-415V, 50Hz
MV5-X224W/V2GN1-AU
MV5-X280W/V2GN1-AU
MV5-X335W/V2GN1-AU
MV5-X400W/V2GN1-AU
MV5-X450W/V2GN1-AU
MV5-X500W/V2GN1-AU

001 Part 1 General Information
013 Part 2 Selection Procedure
019 Part 3 Specifications & Performances
082 Part 4 Installation
129 Part 5 Troubleshooting
Contents

MCAC-VTSM-2015-10 R410AAll DC Inverter V5 X Series 50Hz
General Information 1
Part 1 General Information
1. Features..........................................................................................................2
2. Outdoor units.................................................................................................7
3. Indoor units lineup.......................................................................................11
4. Nomenclature...............................................................................................12

R410AAll DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
2 General Information
1. Features
1.1 Energy saving
V5 X 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.
1.1.1 High EER and COP values
The cooling EER is up to 4.7 and the heating COP is up to 5.6 in the 8HP category.
1.1.2 All DC inverter compressors
The DC inverter compressor adopts innovative design and numerous high performance key parts which can
reduce power consumption by 25%.
1.1.3 All DC fan motors
The system controls the speed of the fan motor according to the system pressure and system load achieving
the minimum power consumption.
EER
COP
8HP
10HP
12HP
14HP
16HP
18HP
20HP
22HP
8HP
10HP
12HP
14HP
16HP
18HP
20HP
22HP
4.7
4.5
4.3
4.3
4.1
3.9
3.86
3.74
5.6
5.3
4.9
4.8
4.6
4.25
4.12
4.03
15 steps vector control
Low
High
More compact, weight,
reduced by 50%
Specially designed
scroll profile for R410A
New structure enhances
mid-frequency performance
Advanced permanent
magnet DC motor improves low-
frequency band performance

MCAC-VTSM-2015-10 R410AAll DC Inverter V5 X Series 50Hz
General Information 3
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.
δdesign increases the hot liquid rate in the condenser and improves the heat-exchange efficiency.
1.2 Flexible design
1.2.1 Wide capacity range
V5X Series has extensive capacity ranging from 8HP to 72HP, meets all customer requirement concerning
small to large buildings.
1.2.2 Wide operation range
V5X Series operates stably under extreme conditions, ranging from minus 20°C to 48°C.
43oC
75oC
Liquid
Liquid
Liquid
Gas
Gas
Gas
New design
Original design
Cooling mode
Heating mode
-20oC
24oC
-5oC
48oC

R410AAll DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
4 General Information
1.2.3 Flexible piping design
*The longest piping length is 40m standard. It can be
extended to 90m. When the length is over 40m, please
refer to installation part for more information and
restrictions.
Total piping length
1000m
Longest length actual (Equivalent)
175(200)m
Longest length after first branch
90*m
Level difference between indoor
and outdoor units - ODU up (down)
90(110)m
Level difference between indoor units
30m
1.2.4 High external static pressure
High-static pressure propeller and optimized fan guard can adapt to various installation environments.
V5 X Series units offer up to 60Pa external static pressure for customized applications. A standard 0-20Pa
function is equipped by default.
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.
Longest actual piping length 175m
Level difference between IDU~ODU 110m
Level difference between IDU~IDU 30m

MCAC-VTSM-2015-10 R410AAll DC Inverter V5 X Series 50Hz
General Information 5
1.3.3 Precise oil control technology
5 stages oil control technology ensures all outdoor unit and compressor oil is always kept at a safe level,
completely solving any compressor oil shortage problems.
1st stage: Compressor internal oil separation.
2nd stage: High efficiency centrifugal oil separator (separation efficiency up to 99%) ensures oil
separated from the discharge gas is returned to the compressors.
3rd stage: Oil balance pipes between compressors ensure even oil distribution to keep compressors
running normally.
4th stage: Oil balance pipes among modules ensure even oil distribution among modules.
5th stage: Auto oil return program by monitoring the running time and system status ensures reliable oil
return.
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.
1.4.2 Intelligent defrosting technology
Intelligent defrosting program will judge the defrosting time according to the system real requirement, reduce
heating loss caused by unnecessary defrosting and create more comfort.
Defrosting time can be shortened to 4 min. due to the specialized defrosting valve.

R410AAll DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
6 General Information
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.
With one set of wires, we can achieve the network communication and system communication, making
installation at site more convenient.
1.5.3 Rotatable electric box
The newly designed rotating control box can rotate on a maximum of 150 degree. It is convenient for the
inspection and maintenance of the pipeline system and greatly reduces the dismount time of the electric
control box.
X Y E
X Y E
P Q E
P Q E
P Q E
P Q E

MCAC-VTSM-2015-10 R410AAll DC Inverter V5 X Series 50Hz
General Information 7
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.
8,10,12HP
14,16,18HP
20~36HP
38~54HP
56~72HP

R410AAll DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
8 General Information
Standard combination
Capacity
Combination type
Max. quantity of
connectable indoor units
Cooling
capacity
kW
Heating
capacity
kW
8
8HP
16
22.4
25
10
10HP
18
28
31.5
12
12HP
22
33.5
37.5
14
14HP
26
40
45
16
16HP
30
45
50
18
8+10HP
34
50.4
56.5
20
10+10HP
36
56
63
22
8+14HP
38
62.4
70
24
10+14HP
40
68
76.5
26
12+14HP
43
73.5
82.5
28
14+14HP
46
80
90
30
14+16HP
50
85
95
32
16+16HP
53
90
100
34
10+12+12HP
56
95
106.5
36
12+12+12HP
59
100.5
112.5
38
10+12+16HP
63
106.5
119
40
12+12+16HP
64
112
125
42
12+14+16HP
64
118.5
132.5
44
12+16+16HP
64
123.5
137.5
46
14+16+16HP
64
130
145
48
16+16+16HP
64
135
150
50
8+10+16+16HP
64
140.4
156.5
52
10+10+16+16HP
64
146
163
54
10+12+16+16HP
64
151.5
169
56
10+14+16+16HP
64
158
176.5
58
10+16+16+16HP
64
163
181.5
60
12+16+16+16HP
64
168.5
187.5
62
14+16+16+16HP
64
175
195
64
16+16+16+16HP
64
180
200
66
16+16+16+18HP
64
185
206
68
16+16+18+18HP
64
190
212
70
16+18+18+18HP
64
195
218
72
18+18+18+18HP
64
200
224

MCAC-VTSM-2015-10 R410AAll DC Inverter V5 X Series 50Hz
General Information 9
Space saving combination
Capacity
Combination type
Max. quantity of
connectable indoor units
Cooling capacity
Heating capacity
kW
kW
8
8HP
16
22.4
25
10
10HP
18
28
31.5
12
12HP
22
33.5
37.5
14
14HP
26
40
45
16
16HP
30
45
50
18
18HP
34
50
56
20
8+12HP
36
55.9
62.5
22
10+12HP
38
61.5
69
24
12+12HP
40
67
75
26
8+18HP
43
72.4
81
28
12+16HP
46
78.5
87.5
30
12+18HP
50
83.5
93.5
32
16+16HP
53
90
100
34
16+18HP
56
95
106
36
18+18HP
59
100
112
38
10+10+18HP
63
106
119
40
10+12+18HP
64
111.5
125
42
12+12+18HP
64
117
131
44
12+14+18HP
64
123.5
138.5
46
12+16+18HP
64
128.5
143.5
48
12+18+18HP
64
133.5
149.5
50
16+16+18HP
64
140
156
52
16+18+18HP
64
145
162
54
18+18+18HP
64
150
168
56
12+12+14+18HP
64
157
176
58
12+12+16+18HP
64
162
181
60
12+12+18+18HP
64
167
187
62
12+16+16+18HP
64
173.5
193.5
64
12+16+18+18HP
64
178.5
199.5
66
12+18+18+18HP
64
183.5
205.5
68
16+16+18+18HP
64
190
212
70
16+18+18+18HP
64
195
218
72
18+18+18+18HP
64
200
224

R410AAll DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
10 General Information
Energy efficiency combination
Capacity
Combination type
Max. quantity of
connectable indoor units
Cooling capacity
Heating capacity
kW
kW
8
8HP
16
22.4
25
10
10HP
18
28
31.5
12
12HP
22
33.5
37.5
14
14HP
26
40
45
16
8+8HP
30
44.8
50
18
8+10HP
34
50.4
56.5
20
10+10HP
36
56
63
22
8+14HP
38
62.4
70
24
8+8+8HP
40
67.2
75
26
8+8+10HP
43
72.8
81.5
28
8+8+12HP
46
78.3
87.5
30
8+10+12HP
50
83.9
94
32
8+12+12HP
53
89.4
100
34
8+12+14HP
56
95.9
107.5
36
8+14+14HP
59
102.4
115
38
12+12+14HP
63
107
120
40
12+14+14HP
64
113.5
127.5
42
14+14+14HP
64
120
135
44
14+14+16HP
64
125
140
46
14+16+16HP
64
130
145
48
16+16+16HP
64
135
150
50
10+12+14+14HP
64
141.5
159
52
10+12+14+16HP
64
146.5
164
54
12+12+14+16HP
64
152
170
56
12+12+16+16HP
64
157
175
58
12+14+16+16HP
64
163.5
182.5
60
14+14+16+16HP
64
170
190
62
14+16+16+16HP
64
175
195
64
16+16+16+16HP
64
180
200
66
16+16+16+18HP
64
185
206
68
16+16+18+18HP
64
190
212
70
16+18+18+18HP
64
195
218
72
18+18+18+18HP
64
200
224

MCAC-VTSM-2015-10 R410AAll DC Inverter V5 X Series 50Hz
General Information 11
3. Indoor units lineup
Capacity
(kW)
Type
One-way
cassette
Two-way
Cassette
Compact
four-way
cassette
Four-way
cassette
Low static
pressure
duct
Concealed
duct unit
(A5 Type)
1.8
1.8
1.8
2.2
2.2
2.2
2.2
2.2
2.2
2.8
2.8
2.8
2.8
2.8
2.8
2.8
3.6
3.6
3.6
3.6
3.6
3.6
3.6
4.5
4.5
4.5
4.5
4.5
4.5
4.5
5.6
5.6
5.6
5.6
5.6
5.6
7.1
7.1
7.1
7.1
7.1
7.1
8
8
8
9
9
9
10
10
11.2
11.2
11.2
12.5
14
14
14
Capacity
(kW)
Type
High static
pressure
duct
Ceiling &
floor
Wall
mounted
Console
Floor
standing
Fresh air
processing
Unit
1.8
2.2
2.2
2.2
2.2
2.8
2.8
2.8
2.8
3.6
3.6
3.6
3.6
3.6
4.5
4.5
4.5
4.5
4.5
5.6
5.6
5.6
5.6
7.1
7.1
7.1
7.1
7.1
8
8
8
8
8
9
9
9
9
10
11.2
11.2
11.2
12.5
12.5
14
14
14
14
16
16
16
20
20
20
25
25
25
28
28
28
40
40
45
45
56
56
Due to continuous improvement, specifications are subject to change without prior notice.

R410AAll DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
12 General Information
4. Nomenclature
M V5 –X 224 W / V2 G N1 - AU
Designed for Australia
Refrigerant type
N1: R410A
Power supply
G: 380-415V, 3Ph, 50Hz/60Hz
Type
V2: All DC Inverter type
Outdoor Unit
Cooling Capacity (×100W)
X Series
The 5th generation inverter VRF unit
Midea

MCAC-VTSM-2015-10 R410AAll DC Inverter V5 X Series 50Hz
Selection Procedure 13
Part 2 Selection Procedure
1. Introduction ..................................................................................................14
2. Unit selection (based on cooling load).......................................................17

R410AAll DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
14 Selection Procedure
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.
Selection of air conditioning system

Design of the control system

Preliminary selection of indoor and outdoor units

Check of the tubing length and level difference
Check that the length of refrigerant tubing and the elevation difference are within the allowable ranges
Calculation of the corrected outdoor unit capacity
Capacity correction coefficient for model, outdoor temperature conditions, tubing length and elevation
difference.
Calculation of the actual capacity for each indoor unit
Calculate the corrected indoor/outdoor capacity ratio, based on the corrected outdoor unit capacity and the
total corrected capacity of all indoor units in the same system.
Recheck of the actual capacity for each indoor unit
If the capacity is inadequate, reexamine the unit combinations.
1.2 Indoor unit selection
Enter INDOOR UNIT CAPACITY TABLES at given indoor and outdoor temperature. Select the unit with the
nearest greater capacity to the given load.
Note:
Individual indoor unit capacity is affected by ODU selection. Actual capacity has to be calculated according to the outdoor unit
capacity table.
Calculation of actual capacity of indoor unit
Because the capacity of a multi air-conditioner system changes according to the temperature conditions,
tubing length, elevation difference and other factors, select the correct model after taking into account the
various correction values. When selecting the model, calculate the corrected capacities of the outdoor unit and
each indoor unit. Use the corrected outdoor unit capacity and the total corrected capacity of all the indoor units
to calculate the actual final capacity of each indoor unit.
Find the indoor unit capacity correction coefficient for the following items:
Capacity correction for the indoor unit temperature conditions
From the graph of capacity characteristics, use the indoor temperature to find the capacity correction
coefficient.
Capacity distribution ratio based on the indoor unit tubing length and elevation difference.
First, in the same way as for the outdoor unit, use the tubing length and elevation difference for each indoor
unit to find the correction coefficient from the graph of capacity change characteristics
Capacity distribution ratio for each indoor unit=Correction coefficient for that indoor unit / Correction coefficient for the
outdoor unit
1.3 Outdoor unit selection
Allowable combinations are indicated in INDOOR UNIT COMBINATION TOTAL CAPACITY INDEX TABLE.
In general, outdoor units should be selected by the following factors, the location of the unit, zoning and usage

MCAC-VTSM-2015-10 R410AAll DC Inverter V5 X Series 50Hz
Selection Procedure 15
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. It is recommended to choose a larger outdoor unit if the installation
space is large enough.
If the combination ratio is greater than 100%, the indoor unit selection shall be reviewed by using actual
capacity of each indoor unit.
INDOOR UNIT COMBINATION TOTAL CAPACITY INDEX TABLE
Outdoor
Unit
Indoor Unit Combination Ratio kW
HP
130%
120%
110%
100%
90%
80%
70%
60%
50%
8
29.12
26.88
24.64
22.4
20.16
17.92
15.68
13.44
11.2
10
36.4
33.6
30.8
28
25.2
22.4
19.6
16.8
14
12
43.55
40.2
36.85
33.5
30.15
26.8
23.45
20.1
16.75
14
52
48
44
40
36
32
28
24
20
16
58.5
54
49.5
45
40.5
36
31.5
27
22.5
18
65.52
60.48
55.44
50.4
45.36
40.32
35.28
30.24
25.2
20
72.8
67.2
61.6
56
50.4
44.8
39.2
33.6
28
22
81.12
74.88
68.64
62.4
56.16
49.92
43.68
37.44
31.2
24
88.4
81.6
74.8
68
61.2
54.4
47.6
40.8
34
26
95.55
88.2
80.85
73.5
66.15
58.8
51.45
44.1
36.75
28
104
96
88
80
72
64
56
48
40
30
110.5
102
93.5
85
76.5
68
59.5
51
42.5
32
117
108
99
90
81
72
63
54
45
34
123.5
114
104.5
95
85.5
76
66.5
57
47.5
36
130.65
120.6
110.55
100.5
90.45
80.4
70.35
60.3
50.25
38
138.45
127.8
117.15
106.5
95.85
85.2
74.55
63.9
53.25
40
145.6
134.4
123.2
112
100.8
89.6
78.4
67.2
56
42
154.05
142.2
130.35
118.5
106.65
94.8
82.95
71.1
59.25
44
160.55
148.2
135.85
123.5
111.15
98.8
86.45
74.1
61.75
46
169
156
143
130
117
104
91
78
65
48
175.5
162
148.5
135
121.5
108
94.5
81
67.5
50
182.52
168.48
154.44
140.4
126.36
112.32
98.28
84.24
70.2
52
189.8
175.2
160.6
146
131.4
116.8
102.2
87.6
73
54
196.95
181.8
166.65
151.5
136.35
121.2
106.05
90.9
75.75
56
205.4
189.6
173.8
158
142.2
126.4
110.6
94.8
79
58
211.9
195.6
179.3
163
146.7
130.4
114.1
97.8
81.5
60
219.05
202.2
185.35
168.5
151.65
134.8
117.95
101.1
84.25
62
227.5
210
192.5
175
157.5
140
122.5
105
87.5
64
234
216
198
180
162
144
126
108
90
66
240.5
222
203.5
185
166.5
148
129.5
111
92.5
68
247
228
209
190
171
152
133
114
95
70
253.5
234
214.5
195
175.5
156
136.5
117
97.5
72
260
240
220
200
180
160
140
120
100

R410AAll DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
16 Selection Procedure
INDOOR UNIT CAPACITY INDEX
Unit Size
Model
Model
Model
Model
Model
Model
Model
Model
Model
Model
18
22
28
36
45
56
71
80
90
112
Capacity
kW
1.8
2.2
2.8
3.6
4.5
5.6
7.1
8
9
11.2
Unit Size
Model
Model
Model
Model
Model
Model
Model
Model
Model
125
140
160
200
250
280
400
450
560
Capacity
kW
12.5
14
16
20
25
28
40
45
56
1.4 Actual performance data
Use OUTDOOR UNIT CAPACITY TABLES.
Determine correct table according to the outdoor unit model and combination ratio.
Enter the table at given indoor and outdoor temperature and find the outdoor unit capacity and power input.
The individual indoor unit capacity (power input) can by calculated as follows.
IUC=OUC ×INX/TNX
Notes:
IUC: Each indoor unit capacity
OUC: Outdoors unit capacity
INX: Each indoor unit capacity index
TNX: Total capacity index
Then, correct the indoor unit capacity according to the piping length.
If the corrected capacity is smaller than the load, the size of indoor unit has to be increased and repeat the
same selection procedure.
1.5 Cooling capacity modification in accordance with the length of refrigerant pipe
Modification coefficient of the length and height difference of refrigerant pipe:
1.5.1 Cooling capacity modification
L: Refrigerant pipe equivalent length
H: Height difference between outdoor and indoor unit. Positive data means outdoor unit is higher. Negative
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180
100%
99 97
94
92
87
89
85
H(m)
L(m)
190 200
83
90
80
80
210 220

MCAC-VTSM-2015-10 R410AAll DC Inverter V5 X Series 50Hz
Selection Procedure 17
data means outdoor unit is lower.
1.5.2 Heating capacity modification
2. Unit selection (based on cooling load)
2.1 Given condition
Condition:
Cooling: indoor temperature 20oC (68°F)WB, outdoor temperature 35oC(95°F)DB;
Cooling load
Location
Room A
Room B
Room C
Room D
Room E
Room F
Load kW
2.1
2.8
3.5
4.6
5.8
7.2
Power supply: outdoor 380~415V-3Ph-50Hz, indoor 220~240V-1Ph-50Hz.
Piping length: 50m; Height difference between indoor unit and outdoor unit: 30m
2.2 Indoor unit selection
Select the suitable capacity for the following conditions: ‘Indoor 20°C(68°F) WB, Outdoor 35°C(95°F) DB’ using
indoor unit capacity table. The selected result is as follows. (Assuming the indoor unit type is duct)
Location
Room A
Room B
Room C
Room D
Room E
Room F
Load kW
2.1
2.8
3.5
4.6
5.8
7.2
Model
22
28
36
45
56
71
Capacity kW
2.3
2.9
3.7
4.8
6.0
7.5
2.3 Outdoor unit selection
1)Assume the indoor unit and outdoor unit combination as follows
Calculate the total nominal capacity of indoor units in the combination according to the above table:
2.2 ×1 +2.8 ×1+ 3.6 ×1 +4.5 ×1+ 5.6 ×1 + 7.1 ×1 = 25.8kW
Select outdoor unit: MV5-X280W/V2GN1-AU which has nominal cooling capacity: 28kW.
Calculate the proportion: 258/280= 92%
2)Result: Because the proportion is within 50～130%, it is a suitable selection.
Real function data with indoor unit combination
For the 92% combination, calculate the cooling capacity of outdoor unit MV5-X280W/V2GN1-AU:
26.8kW←90% (Indoor temperature: WB 20°C, Outdoor temperature: DB 35°C)
28.3kW←100% (Indoor temperature: WB 20°C, Outdoor temperature: DB 35°C)
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 L(m)
100%
99
98
97
95
96
93
H(m)
180 190 200
90
80
90
210 220

R410AAll DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
18 Selection Procedure
Then calculate the outdoor capacity in 92% combination index: 26.8+{(28.3-26.8)/10}×2=27.1kW;
Capacity modification coefficient with pipe length 50m(164ft) and height difference 30m: 0.958
Each indoor unit cooling capacity
Room A: MDV-D22T2 (27.1×22/258×0.958=2.21kW)
Room B: MDV-D28T2 (27.1×28/258×0.958=2.82kW)
Room C: MDV-D36T2 (27.1×36/258×0.958=3.62kW)
Room D: MDV-D45T2 (27.1×45/258×0.958=4.53kW)
Room E: MDV-D56T2 (27.1×56/258×0.958=5.64kW)
Room F: MDV-D71T2 (27.1×71/258×0.958=7.14kW)
Location
Room A
Room B
Room C
Room D
Room E
Room F
Load kW
2.1
2.8
3.5
4.6
5.8
7.2
Model
22
28
36
45
56
71
Capacity kW
2.21
2.82
3.62
4.53
5.64
7.14
2.4 Conclusion
Generally, this result is acceptable, therefore the calculation process has been completed. But if it appears that
the result is not acceptable, the above process may be repeated.
Remark: In this sample, other capacity modification indexes were not considered and are assumed as 1.0.
For more details about the effect factor such as outside ambient/inside ambient DB/WD, please refer to the
performance table of indoor and outdoor units.