VLT
®
5000 Series
■ Warnings
The display flashes between normal state and warn-
ing. A warning comes up on the first and second
line of the display. See examples below:
SETUP
1
NO MOTOR
WARN. 3
Alarm messages
The alarm comes up in the 2. and 3. line of the dis-
play, see example below:
ALARM:12
SETUP
1
TRIP (RESET)
TORQUE LIMIT
WARNING 1
Under 10 Volts (10 VOLT LOW):
The 10 Volts voltage from terminal 50 on the control
card is below 10 Volts.
Remove some of the load from terminal 50, as the 10
Volts supply is overloaded. Max. 17 mA/min. 590
.
WARNING/ALARM 2
Live zero fault (LIVE ZERO ERROR):
The current signal on terminal 60 is less than 50%
of the value set in parameter 315 Terminal 60,min.
scaling.
WARNING/ALARM 3
No motor (NO MOTOR):
The motor check function (see parameter 122) indi-
cates that no motor has been connected to the
output of the VLT frequency converter.
WARNING/ALARM 4
Phase fault (MAINS PHASE LOSS):
A phase is missing on the supply side or the mains
voltage imbalance is too high.
This mesage can also appear if there is a fault in the
input rectifier on the VLT frequency converter.
Check the supply voltage and supply currents to the
VLT frequency converter.
WARNING 5
Voltage warning high
(DC LINK VOLTAGE HIGH):
The intermediate circuit voltage (DC) is higher than
the overvoltage limit of the control system. The VLT
frequency converter is still active.
WARNING 6
Voltage warning low (DC LINK VOLTAGE LOW):
The intermediate circuit voltage (DC) is below the
undervoltage limit of the control system. The VLT
frequency converter is still active.
WARNING/ALARM 7
Overvoltage (DC LINK OVERVOLT):
If the intermediate circuit voltage (DC) exceeds the
inverter overvoltage limit (see table), the VLT
frequency converter will trip after the time set in pa-
rameter 410 has passed.
Furthermore, the voltage will be stated in the display.
The fault can be eliminated by connecting a brake
resistor (if the VLT frequency converter has an inte-
gral brake chopper, EB or SB) or by extending the
time chosen in parameter 410. In addition, Brake
function/overvoltage control can be activated in pa-
rameter 400.
MG.51.A1.02 - VLT is a registered Danfoss trade mark
177
Miscellaneous
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