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Modbus interface
Indoor unit
central control
SW2 SW1
address
13
0
14
0
15
0
16
0
65
4
66
4
67
4
68
4
69
4
70
4
71
4
72
4
73
4
74
4
75
4
76
4
77
4
78
4
79
4
80
4
(2) Check the communication status between Modbus Interface and outdoor unit with LED5.
Check that the communication between Modbus Interface and each outdoor unit
connected is normally performed by selecting an outdoor unit using SW1 to SW3.
Confirming procedure:
• Set bit2 of SW3 to "ON" during normal operation.
• Set the line address of the target outdoor unit with SW1 and SW2.
Set SW1 and SW2 according to the table below, titled "Line address of outdoor unit and SW1/SW2 setting".
• Communication status is displayed by LED5.
Communication status with outdoor unit
Normal
Invalid outdoor unit
• The protocol for communication with an outdoor unit is displayed by LED4.
Protocol for communication with
outdoor unit
In communication via Uh Line
In communication based on old
communication protocol
(Example)
Check the communication status of outdoor unit with line address of 10.
Set bit1 of SW3 to "ON", SW2 to "8" and SW1 to "9".
Indoor unit
central control
address
C
29
D
30
E
31
F
32
0
81
1
82
2
83
3
84
4
85
5
86
6
87
7
88
8
89
9
90
A
91
B
92
C
93
D
94
E
95
F
96
Error
Blinking
Indoor unit
SW2 SW1
central control
address
1
C
45
1
D
46
1
E
47
1
F
48
5
0
97
5
1
98
5
2
99
5
3
100
5
4
101
5
5
102
5
6
103
5
7
104
5
8
105
5
9
106
5
A
107
5
B
108
5
C
109
5
D
110
5
E
111
5
F
112
LED5
Lighting
Modbus interface is in communication with the outdoor unit.
Communication with the outdoor unit was established
Blinking
previously, but is disabled currently.
Communication with the outdoor unit has never been
Light off
established.
LED4
When Modbus interface is performing communication with
On
the relevant outdoor unit via Uh Line.
When Modbus interface is performing communication with
the relevant outdoor unit based on old communication
protocol.
Installation Manual
Indoor unit
SW2 SW1
central control
address
2
C
61
2
D
62
2
E
63
2
F
64
6
0
113
6
1
114
6
2
115
6
3
116
6
4
117
6
5
118
6
6
119
6
7
120
6
8
121
6
9
122
6
A
123
6
B
124
6
C
125
6
D
126
6
E
127
6
F
128
Remarks
Note
SW2 SW1
3
C
3
D
3
E
3
F
7
0
7
1
7
2
7
3
7
4
7
5
7
6
7
7
7
8
7
9
7
A
7
B
7
C
7
D
7
E
7
F
18-EN
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