VLT HVAC Low Harmonic Drive Operating In-
structions
Alarm Word and Extended Status Word
Bit
Hex
0
00000001
1
00000002
2
00000004
3
00000008
4
00000010
5
00000020
6
00000040
7
00000080
8
00000100
9
00000200
10
00000400
11
00000800
12
00001000
13
00002000
14
00004000
15
00008000
16
00010000
17
00020000
18
00040000
19
00080000
20
00100000
21
00200000
22
00400000
23
00800000
24
01000000
25
02000000
26
04000000
27
08000000
28
10000000
29
20000000
30
40000000
31
80000000
Table 9.6: Description of Alarm Word, Warning Word and Extended Status Word
The alarm words, warning words and extended status words can be read out via serial bus or optional fieldbus for diagnosis. See also par. 16-90
Word , par. 16-92 Warning Word and par. 16-94 Ext. Status Word . "Reserved" means that the bit is not guaranteed to be any particular value. Reserved
bits should not be used for any purpose.
Dec
Alarm Word
1
Mains Cont. Fault
2
Heatsink Temp
4
Earth Fault
8
Ctrl.Card Temp
16
Ctrl. Word TO
32
Over Current
64
SC Cont. Fault
128
Cap. Over Current
256
Cap. Earth Fault
512
Inverter Overld.
1024
DC under Volt
2048
DC over Volt
4096
Short Circuit
8192
Inrush Fault
16384
Mains ph. Loss
32768
Auto CT Error
65536
Reserved
131072
Internal Fault
262144
DC Over Current
524288
Resistor temp
1048576
Mains Earth Fault
2097152
Switch. Freq. Limit
4194304
Fieldbus Fault
8388608
24 V Supply Low
16777216
CT Range
33554432
1.8V Supply Low
67108864
Reserved
134217728
Auto CT Interrupt
268435456
Option Change
536870912
Unit Initialized
1073741824
Safe Stop
2147483648
Mains Freq. Limit
®
MG.16.A1.02 - VLT
is a registered Danfoss trademark
Warning Word
Extended Status Word
Reserved
Reserved
Heatsink Temp
Auto CT Running
Earth Fault
Reserved
Ctrl.Card Temp
Reserved
Ctrl. Word TO
Reserved
Over Current
Reserved
Reserved
Reserved
Cap. Over Current
Reserved
Cap. Earth Fault
Reserved
Inverter Overld.
Reserved
DC under Volt
Reserved
DC over Volt
Reserved
DC Voltage Low
Reserved
DC Voltage High
Reserved
Mains ph. Loss
Reserved
Reserved
Reserved
Reserved
Reserved
10V Low
Password Time Lock
DC Over Current
Password Protection
Resistor temp
Reserved
Mains Earth Fault
Reserved
Reserved
Reserved
Fieldbus Fault
Reserved
24V Supply Low
Reserved
Reserved
Reserved
Reserved
Reserved
Low Temp
Reserved
Reserved
Reserved
Reserved
Reserved
Unit Initialized
Reserved
Safe Stop
Reserved
Extended Status Word
Reserved
9 Troubleshooting
9
Alarm
181
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