Danfoss VLT Series Design Manual page 169

VLT ® HVAC Drive Design Guide
Alarm Word and Extended Status Word
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8.2: Description of Alarm Word, Warning Word and Extended Status Word
The alarm words, warning words and extended status words can be read out for diagnosis via
serial bus or optional serial communication bus. See also par. 16-90, 16-92 and 16-94.
WARNING 1, 10 Volts low:
The 10 V voltage from terminal 50 on the con-
trol card is below 10 V.
Remove a portion of the load from terminal
50, as the 10 v supply is overloaded. Max. 15
mA or minimum 590 Ω.
WARNING/ALARM 2, Live zero error:
The signal on terminal 53 or 54 is less than
50% of the value set in par. 6-10, 6-12, 6-20
or 6-22, respectively.
WARNING/ALARM 3, No motor:
No motor has been connected to the output of
the adjustable frequency drive.
WARNING/ALARM 4, Line phase loss:
A phase is missing on the supply side, or the
line voltage imbalance is too high.
Hex Dec Alarm Word
00000001 1 Brake Check
00000002 2 Pwr. Card Temp
00000004 4 Ground Fault
00000008 8 Ctrl.Card Temp
00000010 16 Ctrl. Word TO
00000020 32 Overcurrent
00000040 64 Torque Limit
00000080 128 Motor Th Over
00000100 256 Motor ETR Over
00000200 512 Inverter Overld.
00000400 1024 DC Undervolt
00000800 2048 DC Overvolt
00001000 4096 Short Circuit
00002000 8192 Soft-charge fault DC Voltage High
00004000 16384 Line ph. Loss
00008000 32768 AMA Not OK
00010000 65536 Live Zero Error
00020000 131072 Internal Fault
00040000 262144 Brake Overload
00080000 524288 U-phase Loss
00100000 1048576 V-phase Loss
00200000 2097152 W-phase Loss
00400000 4194304 Ser.
fault
00800000 8388608 24 V Supply Low 24 V Supply Low
01000000 16777216 Line Failure
02000000 33554432 1.8 V Supply Low Current Limit
04000000 67108864 Brake Resistor
08000000 134217728 Brake IGBT
10000000 268435456 Option Change
20000000 536870912 Drive Initialized
40000000 1073741824 Safe Stop
MG.11.B4.22 - VLT ® is a registered Danfoss trademark.
Warning Word
Brake Check
Pwr. Card Temp
Ground Fault
Ctrl.Card Temp
Ctrl. Word TO
Overcurrent
Torque Limit
Motor Th Over
Motor ETR Over
Inverter Overld.
DC Undervolt
DC Overvolt
DC Voltage Low
Line ph. Loss
No Motor
Live Zero Error
10 V Low
Brake Overload
Brake Resistor
Brake IGBT
Speed Limit
com. bus Ser. com. bus fault
Line Failure
Low Temp
Voltage Limit
Unused
Unused
Unused
This message also appears in case of a fault
in the input rectifier on the adjustable fre-
quency drive.
Check the supply voltage and supply currents
to the adjustable frequency drive.
WARNING 5, DC link voltage high:
The intermediate circuit voltage (DC) is higher
than the overvoltage limit of the control sys-
tem. The adjustable frequency drive is still
active.
WARNING 6, DC link voltage low:
The intermediate circuit voltage (DC) is below
the undervoltage limit of the control system.
The adjustable frequency drive is still active.
8. Troubleshooting
Extended Status
Word
Ramping
AMA Running
Start CW/CCW
Slow-down
Catch Up
Feedback High
Feedback Low
Output Current High
Output Current Low
Output Freq High
Output Freq Low
Brake Check OK
Braking Max
Braking
Out of Speed Range
OVC Active
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