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Midea V6 Series User Manual
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V6
VRF 50
Hz
5
Part 1
- Gener
al Inf
ormation
1.3
Outdoor Units
T
able 1-
1.
5
:
Ou
t
door unit capacity range
Capacity
Model Name
Combination Type
8HP
MV6-252WV2GN1
/
10HP
MV6-280WV2GN1
/
12HP
MV6-335WV2GN1
/
14HP
MV6-400WV2GN1
/
16HP
MV6-450WV2GN1
/
18HP
MV6-500WV2GN1
/
20HP
MV6-560WV2GN1
/
22HP
MV6-615WV2GN1
/
24HP
MV6-670WV2GN1
/
26HP
MV6-730WV2GN1
/
28HP
MV6-785WV2GN1
/
30HP
MV6-850WV2GN1
/
32HP
MV6-900WV2GN1
/
34HP
MV6-950WV2GN1
12HP+22HP
36HP
MV6-1015WV2GN1
14HP+22HP
38HP
MV6-1065WV2GN1
16HP+22HP
40HP
MV6-1120WV2GN1
12HP+28HP
42HP
MV6-1175WV2GN1
20HP+22HP
44HP
MV6-1230WV2GN1
22HP+22HP
46HP
MV6-1285WV2GN1
22HP+24HP
48HP
MV6-1345WV2GN1
22HP+26HP
50HP
MV6-1400WV2GN1
22HP+28HP
52HP
MV6-1460WV2GN1
26HP+26HP
54HP
MV6-1515WV2GN1
26HP+28HP
56HP
MV6-1570WV2GN1
28HP+28HP
58HP
MV6-1635WV2GN1
28HP+30HP
60HP
MV6-1685WV2GN1
28HP+32HP
62HP
MV6-1750WV2GN1
30HP+32HP
64HP
MV6-1800WV2GN1
32HP+32HP
66HP
MV6-1850WV2GN1
12HP+22HP+32HP
68HP
MV6-1915WV2GN1
14HP+22HP+32HP
70HP
MV6-1965WV2GN1
16HP+22HP+32HP
72HP
MV6-2020WV2GN1
12HP+28HP+32HP
74HP
MV6-2075WV2GN1
20HP+22HP+32HP
76HP
MV6-2130WV2GN1
22HP+22HP+32HP
78HP
MV6-2185WV2GN1
22HP+24HP+32HP
80HP
MV6-2245WV2GN1
22HP+26HP+32HP
82HP
MV6-2300WV2GN1
22HP+28HP+32HP
84HP
MV6-2360WV2GN1
26HP+26HP+32HP
86HP
MV6-2415WV2GN1
26HP+28HP+32HP
88HP
MV6-2470WV2GN1
28HP+28HP+32HP
90HP
MV6-2535WV2GN1
28HP+30HP+32HP
92HP
MV6-2585WV2GN1
28HP+32HP+32HP
94HP
MV6-2650WV2GN1
30HP+32HP+32HP
96HP
MV6-2700WV2GN1
32HP+32HP+32HP
Note
s:
1.
The combi
nations of u
nits shown in the t
able are
factory-rec
ommended. Othe
r combinat
ions of units ar
e also possible.
5
7
Table of Contents
V6 Service Manual Front Cover
1
CONTENTS
2
Part 1 General Information
4
1 Indoor and Outdoor Unit Capacities
5
1.1 Indoor Units
5
1.1.1 Standard indoor units
5
1.1.2 Fresh air processing unit
5
1.2 Heat recovery ventilator
5
1.3 Outdoor Units
6
2 External Appearance
7
2.1 Indoor Units
7
2.1.1 Standard indoor units
7
2.1.2 Fresh air processing unit
7
2.2 Heat Recovery Ventilator
7
2.3 Outdoor Units
8
2.3.1 Single units
8
2.3.2 Combinations of units
8
3 Outdoor Unit Combinations
9
4 Combination Ratio
10
Part 2 Component Layout and Refrigerant Circuits
12
1 Layout of Functional Components
13
2 Piping Diagrams
17
3 Refrigerant Flow Diagrams
23
Part 3 Control
34
1 General Control Scheme Flowchart
35
2 Stop Operation
36
3 Standby Control
36
3.1 Crankcase Heater Control
36
4 Startup Control
37
4.1 Compressor Startup Delay Control
37
4.2 Startup Control for Cooling Operation
37
4.3 Startup Control for Heating Operation
38
5 Normal Operation Control
39
5.1 Component Control during Normal Operation
39
5.2 Compressor Output Control
41
5.3 Compressor Step Control
41
5.4 Operating Priority and Rotation of Compressors
41
5.5 Electronic Expansion Valve Control
42
5.6 Outdoor Fan Control
43
6 Protection Control
44
6.1 High Pressure Protection Control
44
6.2 Low Pressure Protection Control
44
6.3 Discharge Temperature Protection Control
44
6.4 Compressor and Inverter Module Protection Control
44
6.5 Disable Heating Control
45
7 Special Control
46
7.1 Outdoor Unit Duty Cycling
46
7.2 Oil Return Operation
46
7.3 Defrosting Operation
49
Part 4 Field Settings
50
1 Outdoor Unit Field Settings
51
1.1 PCB Switches and Switch Settings
51
1.2 Modes Set on Main PCB
53
1.2.1 Priority mode setting
53
1.2.2 Silent time setting
54
1.2.2.1 Night silent time setting
54
1.2.2.2 Silent mode setting
55
1.2.2.3 Maximum fan speed and capacity output control in different silent mode
55
Part 5 Electrical Components and Wiring Diagrams
56
1 Outdoor Unit Electric Control Box Layout
57
2 Outdoor Unit Main PCB
59
2.1 Ports
59
2.2 Components
61
2.2.1 Layout
61
2.2.2 Function of buttons SW3 to SW6
61
2.2.3 Menu mode
62
2.2.4 UP / DOWN system check button
64
2.2.5 Digital display output
65
3 Compressor Inverter Module
66
3.1.1 Layout
66
3.1.2 LED indicators LED1 and LED2
66
3.1.3 Dial switch S7 setting
66
4 Wiring Diagrams
67
Part 6 Diagnosis and Troubleshooting
70
1 Error Code Table
71
2 Troubleshooting
72
2.1 Warning
72
2.2 E0: Communication error between outdoor units
73
2.2.1 Digital display output
73
2.2.2 Description
73
2.2.3 Trigger / recover condition
73
2.2.4 Possible causes
73
2.2.5 Procedure
74
2.3 E1: Phase sequence error
75
2.3.1 Digital display output
75
2.3.2 Description
75
2.3.3 Trigger / recover condition
75
2.3.4 Possible causes
75
2.3.5 Procedure
76
2.4 E2: Communication error between indoor and master unit
77
2.4.1 Digital display output
77
2.4.2 Description
77
2.4.3 Trigger / recover condition
77
2.4.4 Possible causes
77
2.4.5 Procedure
78
2.5 E4: Temperature sensor (T3/T4) error
79
2.5.1 Digital display output
79
2.5.2 Description
79
2.5.3 Trigger / recover condition
79
2.5.4 Possible causes
79
2.5.5 Procedure
80
2.6 E5: Abnormal power supply voltage
81
2.6.1 Digital display output
81
2.6.2 Description
81
2.6.3 Trigger / recover condition
81
2.6.4 Possible causes
81
2.6.5 Procedure
82
2.7 E7: Temperature sensor (T7C1/2) error
83
2.7.1 Digital display output
83
2.7.2 Description
83
2.7.3 Trigger / recover condition
83
2.7.4 Possible causes
83
2.7.5 Procedure
84
2.8 E8: Outdoor unit address error
85
2.8.1 Digital display output
85
2.8.2 Description
85
2.8.3 Trigger / recover condition
85
2.8.4 Possible causes
85
2.8.5 Procedure
86
2.9 xE9: EEPROM mismatch
87
2.9.1 Digital display output
87
2.9.2 Description
87
2.9.3 Trigger / recover condition
87
2.9.4 Possible causes
87
2.9.5 Procedure
88
2.10 xF1: DC bus voltage error
89
2.10.1 Digital display output
89
2.10.2 Description
89
2.10.3 Trigger / recover condition
89
2.10.4 Possible causes
89
2.10.5 Procedure
90
2.11 F3, F5: Temperature sensor (T6B/T6A) error
91
2.11.1 Digital display output
91
2.11.2 Description
91
2.11.3 Trigger / recover condition
91
2.11.4 Possible causes
91
2.11.5 Procedure
92
2.12 F6: Electronic expansion valve connection error
93
2.12.1 Digital display output
93
2.12.2 Description
93
2.12.3 Trigger / recover condition
93
2.12.4 Possible causes
93
2.12.5 Procedure
94
2.13 xH0: Communication error
95
2.13.1 Digital display output
95
2.13.2 Description
95
2.13.3 Trigger / recover condition
95
2.13.4 Possible causes
95
2.13.5 Procedure
95
2.14 H2, H3: Slave units decreased/increased
97
2.14.1 Digital display output
97
2.14.2 Description
97
2.14.3 Trigger / recover condition
97
2.14.4 Possible causes
97
2.14.5 Procedure
98
2.15 xH4: Inverter module protection
99
2.15.1 Digital display output
99
2.15.2 Description
99
2.15.3 Trigger / recover condition
99
2.15.4 Possible causes
99
2.15.5 Specific error codes for xH4 inverter module protection
99
2.15.6 L0: Inverter module protection
101
2.15.7 L1: DC bus low voltage protection
102
2.15.8 L2: DC bus high voltage protection
103
2.15.9 L4: MCE error
104
2.15.10 L7: Phase sequence error
105
2.15.11 L8: Compressor frequency variation greater than 15Hz within one second protection
106
2.15.12 Compressor replacement procedure
107
2.16 H7: Unmatched total number of indoor units
110
2.16.1 Digital display output
110
2.16.2 Description
110
2.16.3 Trigger / recover condition
110
2.16.4 Possible causes
110
2.16.5 Procedure
111
2.17 H8: High pressure sensor error
112
2.17.1 Digital display output
112
2.17.2 Description
112
2.17.3 Trigger / recover condition
112
2.17.4 Possible causes
112
2.17.5 Procedure
113
2.18 yHd: Slave unit malfunction
114
2.18.1 Digital display output
114
2.18.2 Description
114
2.18.3 Trigger / recover condition
114
2.18.4 Possible causes
114
2.18.5 Procedure
115
2.19 P1: Discharge pipe high pressure protection
116
2.19.1 Digital display output
116
2.19.2 Description
116
2.19.3 Trigger / recover condition
116
2.19.4 Possible causes
116
2.19.5 Procedure
116
2.20 P2, H5: Suction pipe low pressure protection
118
2.20.1 Digital display output
118
2.20.2 Description
118
2.20.3 Trigger / recover condition
118
2.20.4 Possible causes
118
2.20.5 Procedure
119
2.21 xP3: Compressor current protection
120
2.21.1 Digital display output
120
2.21.2 Description
120
2.21.3 Trigger / recover condition
120
2.21.4 Possible causes
120
2.21.5 Procedure
120
2.22 P4, H6: Discharge temperature protection
122
2.22.1 Digital display output
122
2.22.2 Description
122
2.22.3 Trigger / recover condition
122
2.22.4 Possible causes
122
2.22.5 Procedure
122
2.23 P5: Outdoor heat exchanger temperature protection
124
2.23.1 Digital display output
124
2.23.2 Description
124
2.23.3 Trigger / recover condition
124
2.23.4 Possible causes
124
2.23.5 Procedure
125
2.24 P9, H9: Fan module protection
126
2.24.1 Digital display output
126
2.24.2 Description
126
2.24.3 Trigger / recover condition
126
2.24.4 Possible causes
126
2.24.5 Procedure
126
2.25 PL, C7: Inverter module temperature protection
128
2.25.1 Digital display output
128
2.25.2 Description
128
2.25.3 Trigger / recover condition
128
2.25.4 Possible causes
128
2.25.5 Procedure
129
2.26 PP: Compressor discharge insufficient superheat protection
130
2.26.1 Digital display output
130
2.26.2 Description
130
2.26.3 Trigger / recover condition
130
2.26.4 Possible causes
130
2.26.5 Procedure
131
3 Appendix to Part 6
132
3.1 Temperature Sensor Resistance Characteristics
132
3.2 Normal Operating Parameters of Refrigerant System
135
V6 Service Manual Back Cover
136
5
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Midea V6 Series Specifications
General
Brand
Midea
Model
V6 Series
Category
Air Conditioner
Language
English
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