WARNING 1
10 Volts low:
The 10 V voltage from terminal 50 on the control
card is below 10 V.
Remove some of the load from terminal 50, as the
10 V supply is overloaded. Max. 15 mA or mini-
mum 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.
This message also appears in case of a fault in the
input rectifier on the adjustable frequency 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 system.
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 ad-
justable frequency drive is still active.
WARNING/ALARM 7
DC overvoltage:
If the intermediate circuit voltage exceeds the
limit, the adjustable frequency drive trips after a
time.
Possible corrections:
Connect a brake resistor
Extend the ramp time
Activate functions in par. 2-10
Increase par. 14-26
Alarm/warning limits:
FC 300 Series
3 x 200 -
240 V
3 x 380 -
500 V
3 x 525 -
600 V
[VDC]
[VDC]
[VDC]
Undervoltage
185
373
532
Voltage warn-
ing low
205
410
585
Voltage warn-
ing high (w/o
brake - w/
brake)
390/405
810/840
943/965
Overvoltage
410
855
975
The voltages stated are the intermediate circuit vol-
tages of the FC 300 with a tolerance of ± 5 %. The
corresponding line voltage is the intermediate circuit
voltage (DC link) divided by 1.35.
WARNING/ALARM 8
DC undervoltage:
If the intermediate circuit voltage (DC) drops be-
low the “voltage warning low” limit (see table
above), the adjustable frequency drive checks if
24 V backup supply is connected.
If no 24 V backup supply is connected, the ad-
justable frequency drive trips after a given time
depending on the unit.
To check whether the supply voltage matches the
adjustable frequency drive, see
General Specifi-
cations
.
WARNING/ALARM 9
Inverter overloaded:
The adjustable frequency drive is about to cut out
because of an overload (too high current for too
long). The counter for electronic, thermal inverter
protection gives a warning at 98% and trips at
100%, while sounding an alarm. You cannot reset
the adjustable frequency drive until the counter is
below 90%.
The fault is that the adjustable frequency drive
has been overloaded by more than 100% for too
long.
WARNING/ALARM 10
Motor ETR overtemperature:
According to the electronic thermal protection
(ETR), the motor is too hot. You can choose if you
want the adjustable frequency drive to give a
warning or an alarm when the counter reaches
100% in par. 1-90. The fault is that the motor is
overloaded by more than 100% for too long.
Check that the motor par. 1-24 is set correctly.
VLT
®
AutomationDrive FC 300 Instruction Manual
Warnings and Alarms
82
MG.33.A8.22 - VLT
®
is a registered Danfoss trademark.