LED indication
Warning
yellow
Alarm
flashing red
Trip locked
yellow and red
Alarm Word and Extended Status Word
Bit
Hex
Dec
Alarm Word
Warning Word
Extended Status Word
0
00000001
1
Line Power Cont. Fault
Reserved
Reserved
1
00000002
2
Heatsink Temp
Heatsink Temp
Auto CT Running
2
00000004
4
Ground Fault
Ground Fault
Reserved
3
00000008
8
Ctrl.Card Temp
Ctrl.Card Temp
Reserved
4
00000010
16
Ctrl. Word TO
Ctrl. Word TO
Reserved
5
00000020
32
Overcurrent
Overcurrent
Reserved
6
00000040
64
SC Cont. Fault
Reserved
Reserved
7
00000080
128
Cap. Overcurrent
Cap. Overcurrent
Reserved
8
00000100
256
Cap. Ground Fault
Cap. Ground Fault
Reserved
9
00000200
512
Inverter Overld.
Inverter Overld.
Reserved
10
00000400
1024
DC undervolt
DC undervolt
Reserved
11
00000800
2048
DC overvolt
DC overvolt
Reserved
12
00001000
4096
Short Circuit
DC Voltage Low
Reserved
13
00002000
8192
Inrush Fault
DC Voltage High
Reserved
14
00004000
16384
Mains ph. Loss
Mains ph. Loss
Reserved
15
00008000
32768
Auto CT Error
Reserved
Reserved
16
00010000
65536
Reserved
Reserved
Reserved
17
00020000
131072
Internal Fault
10V low
Password Time Lock
18
00040000
262144
DC Overcurrent
DC Overcurrent
Password Protection
19
00080000
524288
Resistor temp
Resistor temp
Reserved
20
00100000
1048576
L-Pwr Grnd Fa
L-Pwr Grnd Fa
Reserved
21
00200000
2097152
Switch. Freq. Limit
Reserved
Reserved
22
00400000
4194304
Fieldbus fault
Fieldbus Fault
Reserved
23
00800000
8388608
24 V Supply Low
24V Supply Low
Reserved
24
01000000
16777216
CT Range
Reserved
Reserved
25
02000000
33554432
1.8V supply low
Reserved
Reserved
26
04000000
67108864
Reserved
Low Temp
Reserved
27
08000000
134217728
Auto CT Interrupt
Reserved
Reserved
28
10000000
268435456
Option Change
Reserved
Reserved
29
20000000
536870912
Unit Initialized
Unit Initialized
Reserved
30
40000000
1073741824
Safe Stop
Safe Stop
Reserved
31
80000000
2147483648
Line Power Freq. Limit
Extended Status Word
Reserved
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 serial communication bus for diagnosis. See also
par. 16-90
Alarm 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.
9 Troubleshooting
VLT HVAC Low Harmonic Drive Instruction
Manual
9-14
MG.16.A1.22 - VLT
®
is a registered Danfoss trademark
9