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1.
Display switch set to position "11", "12", "13" and "14"
Multi Controller - ThA, B, C, D and X sensor conversion table
Display
Temp. °C
18
-10.0
1C
-9.0
20
-8.0
24
-7.0
28
-6.0
2C
-5.0
30
-4.0
34
-3.0
38
-2.0
3C
-1.0
40
0.0
Display [00] signifies sensor open circuit.
Control board communication diagram
Remote
controller
A few seconds
Remote controller fault code display time lapse for system malfunctions
Serial signal abnormalities:
INV abnormality:
I/F abnormality:
M/C and indoor unit abnormality:
Diagnostic procedure
Multi Controller
Display
Temp. °C
44
1.0
48
2.0
4C
3.0
50
4.0
54
5.0
58
6.0
5C
7.0
60
8.0
64
9.0
68
10.0
6C
11.0
Indoor unit
1 minute
Between the I/F and the INV
Between the M/C and the I/F
Between the indoor unit and the M/C
Between the remote controller and indoor unit
Display
Temp. °C
70
12.0
74
13.0
78
14.0
7C
15.0
80
16.0
84
17.0
88
18.0
8C
19.0
90
20.0
94
21.0
98
22.0
Multi Controller
M/C (1)
Multi Controller
M/C (2)
1 minute
Display
Temp. °C
9C
23.0
A0
24.0
A4
25.0
A8
26.0
AC
27.0
B0
28.0
B4
29.0
B8
30.0
Interface
Inverter
control board
control board
I/F
INV
1 minute
More than 3 minutes
More than 2 minutes
More than 1 minute
A few seconds
More than 3 minutes
More than 2 minutes
More than 1 minute
33
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