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Midea Mini VRF Service Manual
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Contents
Part 1
General Information
.......................................
…
1
Part 2
Outdoor Units
.................................................
…
9
Part 3
Installatio
n
....................................................
…
44
Part 4
T
roubleshooting
.........................................
…
58
Manufactur
e
reserves
t
he
right
to
discontin
ue,
or
change
at
any
t
ime,
specifications
or de
signs
without
notices and
w
ithout
incurring o
bligatio
ns.
1
3
Table of Contents
Contents
2
Part 1 General Information
4
Outdoor Units
5
Product Lineup
5
Nomenclature
6
Features
7
High Efficient DC Inverter Compressor
7
High Performance Heat Exchanger
7
Newly Designed Air Outlet Grill
7
Flexible Piping Design
8
Space Saving Design
8
Wide Operation Temperature Range
8
Auto Addressing
9
Four-Way Piping Connection
9
More Convenient Piping Connector – Branch Box
9
Indoor Units Lineup
10
Table of Contents
12
Part 2 Outdoor Units
12
Specifications
13
Dimensions
15
Parallel Connect the Front with Rear Sides
16
Parallel Connect the Two Units or above
16
Service Space
16
Single Unit Installation
16
4-Way Valve
17
Low Pressure Liquid Receiver
17
Piping Diagrams
17
Wiring Diagrams
18
Field Wiring
19
Single Phase Indoor Unit
19
Capacity Tables
20
Cooling
20
Electric Characteristics
44
Sound Levels
45
Operation Limits
46
Part 3 Installation
47
Precautions
48
Accessories
49
Installation Space
50
Installation Space Selection
50
Outdoor Unit Installation
50
Parallel Connect Two Units or above
51
Allowable Length and Level Difference of Refrigerant Pipe
52
Piping Connection
52
Piping Installation
52
Water Outlet
52
Indoor Unit Branch Pipes Selection
54
Refrigerant Pipe Selection
54
The First Connecting Method
54
The Second Connecting Method
54
Indoor Unit Main Pipes Selection
55
Main Pipes Selection
55
Outdoor Unit Pipe Connection
55
Remove Dirt or Water in the Piping
55
Additional Refrigerant Charge
56
Electric Wiring Installations
56
Highlights of Electrical Installation
56
Leak Detection
56
Distribution Highlights of Distribution Wiring
57
Selection of Wiring
57
Indoor Unit Power Supply Wiring
58
Indoor/Outdoor Unit Signal Wire Wiring
58
Indoor/Outdoor Unit Signal Wire
59
Outdoor Unit Wiring
59
The Specification of Power
59
Wiring Connection
59
Precautions on Refrigerant Leakage
60
Test Running
60
Counter Measure against over High Thickness
60
Part 4 Troubleshooting
61
PCB Ports Instructions
62
PCB Parts Instructions
63
Function Setting Dial Switches Instruction
64
LED on PCB Instructions
65
Error Code Table
66
E9: EEPROM Malfunction
67
H0: Communication Malfunction Betweem Ir341/Main Board
69
E4: T3&T4 Sensor Malfunction
70
E5: Voltage Protection Malfunction
70
E6:DC Fan Error
71
E7: Discharge Sensor Malfunction
72
P1 Malfunction: High Pressure Protection
73
P2: Low Pressure Protection
74
P3: Compressor Current Protection
75
P4:Compressor Discharged Temperature Protection
76
P5: Condenser High Temperature Protection
77
P6: IPM Module Protection
78
DC Generatrix Detection
79
Voltage Check of DC Generatrix
79
Voltage Check of Module
79
Compressor's Characteristics
80
In Normal Situation
81
PE Malfunction: Evaporator T2 High Temperature Protection
82
P8: Typhoon Protection
83
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Midea Mini VRF Specifications
General
Brand
Midea
Model
Mini VRF
Category
Air Conditioner
Language
English
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