Midea V4 Plus S Series User manual

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

001 Part 1 General Information
011 Part 2 Selection Procedure
017 Part 3 Specifications & Performances
080 Part 4 Installation
128Part 5 Troubleshooting
Contents

MCAC-VTSM-2015-09 R410AAll DC Inverter V4+S Series 60Hz
General Information 1
Part 1 General Information
1. Features..........................................................................................................2
2. Outdoor units.................................................................................................7
3. Indoor units lineup.........................................................................................9
4. Nomenclature...............................................................................................10

R410AAll DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09
2 General Information
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.
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
4.29
3.97
3.81
3.54
3.4
3.38
4.39
4.17
4.17
4.02
3.91
3.89
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
8HP
10HP
12HP
14HP
16HP
18HP
8HP
10HP
12HP
14HP
16HP
18HP

MCAC-VTSM-2015-09 R410AAll DC Inverter V4+S Series 60Hz
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
V4+S Series has extensive capacity ranging from 8HP to 72HP, meets all customer requirement concerning
small to large buildings.
1.2.2 Wide operation range
V4+S Series operates stably under extreme conditions, ranging from minus 20°C to 48°C.
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)
70(110)m
Level difference between indoor units
30m
43oC
75oC
Liquid
Liquid
Liquid
Gas
Gas
Gas
New design
Original design
Longest actual piping length 175m
Level difference between IDU~ODU 110m
Level difference between IDU~IDU 30m
Heating mode
Cooling mode
-5oC
48oC
-20oC
24oC

R410AAll DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09
4 General Information
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.
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.

MCAC-VTSM-2015-09 R410AAll DC Inverter V4+S Series 60Hz
General Information 5
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.
1.4.3 Rapid warm up and cool down function
The DC Inverter Compressor system reaches full load rapidly providing less temperature fluctuation and an
improved living environment.
8hrs
10hrs
Night silent Mode
Start
End
Peak value of ambient temp.
Noise
Intelligent defrosting
Usual defrosting
Heating capacity
Time
tmin.
Δt
Time
Cooling operation
Inverter
Non-inverter
Δ1
Δ2

R410AAll DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09
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 Easy Maintenance
Inspection window for checking the systems status.
Self-diagnosis function helps service engineers locate faults quickly and easily.
Compressor is located near the door, which simplifies checks and enables valve or compressor parts to be
replaced easily.
X Y E
X Y E
P Q E
P Q E
P Q E
P Q E
P Q E

MCAC-VTSM-2015-09 R410AAll DC Inverter V4+S Series 60Hz
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.
8,10HP
14,16,18HP
20~36HP
38~54HP
56~72HP

R410AAll DC Inverter V4+S Series 60Hz MCAC-VTSM-2015-09
8 General Information
Combination table
Model
Noof
Outdoor
Units
Noof
Compressors
Outdoor Unit Combination
Max. Noof
Connectable
Indoor Units
Capacity
8HP
10HP
12HP
14HP
16HP
18HP
Cooling
(kW)
Heating
(kW)
8HP
1
1
1
13
25.2
27
10HP
1
1
1
16
28
31.5
12HP
1
2
1
20
33.5
37.5
14HP
1
2
1
23
40
45
16HP
1
2
1
26
45
50
18HP
1
2
1
29
50
56
20HP
2
2
2
33
56
63
22HP
2
3
1
1
36
61.5
69
24HP
2
3
1
1
39
68
76.5
26HP
2
3
1
1
43
73
81.5
28HP
2
3
1
1
46
78
87.5
30HP
2
4
1
1
50
85
95
32HP
2
4
1
1
53
90
101
34HP
2
4
1
1
56
95
106
36HP
2
4
2
59
100
112
38HP
3
4
2
1
63
106
119
40HP
3
5
1
1
1
64
113
126.5
42HP
3
5
3
64
120
135
44HP
3
5
1
1
1
64
123
137.5
46HP
3
5
1
2
64
128
143.5
48HP
3
6
1
1
1
64
135
151
50HP
3
6
1
2
64
140
157
52HP
3
6
1
2
64
145
162
54HP
3
6
3
64
150
168
56HP
4
6
2
2
64
156
175
58HP
4
7
1
1
1
1
64
163
182.5
60HP
4
7
1
1
2
64
168
188.5
62HP
4
7
1
1
2
64
173
193.5
64HP
4
7
1
3
64
178
199.5
66HP
4
8
1
1
2
64
185
207
68HP
4
8
1
3
64
190
213
70HP
4
8
1
3
64
195
218
72HP
4
8
4
64
200
224