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VRF V4 Plus I Series
Midea VRF V4 Plus I Series User Manual
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MCAC-VTSM-
201
4-04
R410A
DC Inverter V4 Plus 50Hz
T
rou
bleshooting
85
2
.
Main board ports instructions
84
86
Table of Contents
General Information
1
Outdoor Units Basic Information
2
External Appearance
2
Product Lineup
2
Nomenclature
3
Wide Capacity Range
4
Flexible Indoor Units Connection
4
Wide Operation Range
4
Features
4
High External Static Pressure
5
High Efficiency
5
High Efficiency DC Inverter Compressor
5
High Efficiency DC Motor
5
Night Silent Operation Mode
6
Intelligent Defrosting Raises Heat Capacity
6
Intelligent Soft Start Technology
6
Enhanced Comfort
6
Easy Installation and Service
7
Compact Design for Effective Use of Space
7
Integrated Design
7
Simple Signal Line Connection
7
Auto Addressing
8
Easy Maintenance
8
Duct Type
9
Cassette Type
9
Indoor Units Lineup
9
Floor-Standing/Ceiling & Floor/Console
10
Wall Mounted/Fresh Air Processing Unit
10
Table of Contents
11
Specifications & Performances
11
Specifications
12
Dimensions
14
Installation and Maintenance Surface
15
Service Space
15
Top View of the Outdoor Unit
15
Piping Diagrams
17
Four-Way Valve
18
Gas-Liquid Separator
18
Key Components
18
Oil Separator
18
Wiring Diagrams and Field Wiring
19
Electric Wiring of Outdoor/Indoor Units
20
Field Wiring
20
Indoor Unit Power Supply
20
Outdoor Unit Power Supply
20
Power(380-415V, 50Hz)
21
Electric Characteristics
22
Capacity Tables
23
Cooling Capacity
23
MDV-730W/DRN1-I(C)
24
Octave Band Center Frequency （ Hz ）
55
Sound Levels
55
Sound Pressure Spectrum
55
Accessories
56
Branch Joint of Outdoor & Indoor Unit
56
Optional Accessories
56
Standard Accessories
56
Selection Procedure
57
Design of the Control System
58
Introduction
58
Model Selection Procedure
58
Selection of an Air Conditioning System
58
Actual Performance Date
59
Capacity Modification in Accordance with Length of Refrigerant Pipe
59
Indoor Unit Capacity Index
59
Indoor Unit Combination Total Capacity Index Table
59
Heating Capacity Modification
60
Refrigerant Pipe Equivalent Length
60
Cooling Load
61
Given Condition
61
Indoor Unit Selection
61
Unit Selection (Based on Cooling Load)
61
Conclusion
62
Installation
63
Foundation for Installation
64
Select Installation Position
64
Installation Space
65
Lifting Method
67
Air Ventilation Assembly Installation
68
Installation in a Snowfall Area
68
Set the Snow-Proof Facility
68
Curve Diagram of Static Pressure & Air Flow Volume
69
Refrigerant Piping Installation
70
Valve Instructions
70
Piping Length
71
Refrigerant Piping Length Permitted Value
71
Indoor Unit Branch Pipe Selection
72
Indoor Unit Main Pipe Selection
72
Pipe Name
72
Refrigerant Piping Selection
72
Example
73
Main Pipe Selection
73
Airtight Test
75
Branch Pipe Installation
75
Remove Dirt or Water in the Piping
75
Vacuum with Vacuum Pump
75
Additional Refrigerant Charge
76
Auto Judging System Refrigerant Volume
76
Connect with Vacuum Pump
76
Electric Wiring Installation
77
Outdoor Unit Powering Supply Wiring
77
Wiring Terminals Instruction
77
Indoor Unit Powering Supply Wiring
78
Signal Wire between Outdoor Unit and Indoor Unit
78
Signal Wiring Installation
78
Example Connection of Wiring
79
Signal Wire of Centralized Control
79
Fill the Name of Connected System
80
Inspection and Confirmation before Commissioning
80
Preparation before Debugging
80
Running Test
80
Caution on Refrigerant Leakage
81
Countermeasure to Overhigh Refrigerant Thickness
81
Troubleshooting
82
Outdoor Electric Control Box Assembly Instructions
83
Main Board Ports Instructions
85
Constraint Cooling
87
Main Board Parts Instructions
87
Sw1
87
SW2 Query Instructions
87
S1 Definition
89
S2 Definition
89
System Setting Dial Switches Instructions
89
S4 Definition
90
S5 Definition
90
S6 Definition
90
ENC1 Definition
91
ENC3 &S12 Definition
91
S10 Definition
91
S8 Definition
91
Error/Protection Code Table
92
Function Setting Dial Switches Instructions
92
E0: Communication Error between Outdoor Units
94
Troubleshooting
94
E1: Phase Sequence Error
95
E2: Indoor Units and Master Unit Communication Error
96
Pressing the Manual Button Continued for 5 Seconds
97
Pressing the Manual Button Continued for 10 Seconds
97
If the Signal Is Weak
98
Pipe Temperature T3/Ambient Temperature Sensor (T4) Error
99
How to Check Whether the Compressor Is Short Circuit
99
How to Check Whether the Fan Motor Is Short Circuit
99
How to Check Whether the Inverter Module Is Output Error
99
H0/H1
100
H6
101
How to Check Whether the Transformer of IDU Is Disabled
101
H7: Quantity of Indoor Units Decrease Error
101
H8: High Pressure Sensor Error
102
P0/P4/H6: High Temperature Protection
103
P1: High Pressure Protection
104
P2/H5: Low Pressure Protection
105
P3/XP7/P8: Compressor Current Protection
106
P5: Condenser Temperature T3 Protection
107
P6/H4: Inverter Module Protection
108
DC Generatrix Check
109
Module Check
109
L0/L8/L9 Troubleshooting
110
Check the Compressor
110
L1/L4 Troubleshooting
111
L2 Troubleshooting
111
Resistance Value of Ambient Temperature and Pipe Temperature Sensor
112
Commissioning and Operating Parameters of Refrigerant System
114
Outdoor Unit Cooling Parameters Table
114
Outdoor Unit Heating Parameters Table
114
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Midea VRF V4 Plus I Series Specifications
General
Brand
Midea
Model
VRF V4 Plus I Series
Category
Air Conditioner
Language
English
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