Danfoss FC 300 Design Guide

FC 300 Design Guide
Troubleshooting
WARNING/ALARM 12
Torque limit:
The torque is higher than the value in par. 4-16 (in
motor operation) or the torque is higher tha n the
value in par. 4-17 (in reg enerative operation).
WARNING/ALARM 13
Overcurrent:
The inverter peak current lim it (approx. 200%
of the rated current) is exceeded. The warning
will last approx. 8-12 sec., t hen the adjustable
frequency drive trips and issues an alarm. Turn
off the adjustable frequency drive and check if the
motor shaft can be turned and if the m oto r size
matches the adjustable frequency drive.
ALARM 14
Ground fault:
There is a discharge from the output phases to
ground, either in the cable between the adjustable
frequency drive and the motor or in the motor itself.
Turn off the adjustable frequency drive and
remove the g round fault.
ALARM 15
Incomplete hardware:
An inst alled option is not compatible with the
present control board (hardware or software).
ALARM 16
Short-circuit:
There is short-circ uiting in the motor or
on the motor terminals.
Turn off the adjustable frequency drive and
remove the short-circuit.
WARNING/ALARM 17
Control word timeout:
There is no communication to the adjustable
frequency drive.
The warning will only be activated when par.
8-04 is NOT set to OFF.
If par. 8-04 is set to Stop and Trip,awarning
appears and the adjustable frequency drive ramps
down to zero speed, while giving an a larm .
Par. 8-03 Control Word Timeout Time could
possibly be incr eased.
WARNING 25
Brake resistor short-circuited:
The brake resistor is monitored during operation. If
it short-circuits, the brake function is dis
connected
and the warning appears. The adjustable frequency
drive still works, but without the brake function.
Turn off the adjustable frequency drive a nd replace
the brake resistor (see par. 2-15 Brake Check).
WARNING/ALARM 26
Brake resistor power limit:
The power transmitted to the brake resistor is
calculated as a percentage, as a mean value over
the last 120 s , on the basis of the resistance value of
the brake resistor (par. 2-11) and the intermed iate
circuit voltage. The warning is active when the
dissipated braking energy is higher than 90%. If Trip
[2] has been selected in par. 2-13, the adjustable
frequency drive cuts out and issues this alarm, when
the dissipated braking energy is higher than 100%.
WARNING/ALARM 27
Brake chopper fault:
The brake transistor is monitored during operation
and if it short-circuits, the brake function disconnects
and the warning is issued. The adjustable frequency
drive is still able to run, but since the brake transistor
has short-circuited, substantial power is transmitted
to the brake resistor, even if it is inactive.
Turn off the adjustable frequency drive and
remove the brake resistor.
Warning: There is a risk of substantial
power being transmitted to the brake
resistor if the b rake transistor
is short-circuited.
ALARM/WARNING 28
Brake chec k failed:
Brake resistor fault: the brake resistor is
not connected/working.
WARNING/ALARM 29
Drive overtemperature:
If the enclosure is IP 20 or IP 21/TYP E 1, the
cut-out temperature of the heatsink is 203
o
F
+9
o
[95
o
C+5
o
C]. The temperature f ault
cannot be reset, until the temperatur
eofthe
heatsink is below 158
o
F[70
o
C].
The fault could be:
- Ambient temperature too h igh
- Too long motor cable
301
MG.33.B6.22 - VLT is a registered Danfoss trademark

Danfoss FC 300 Specifications

General

Enclosure	IP20
Approvals	cUL, UL, CE
EMC filter	Built-in
Communication Options	CANopen, PROFIBUS DP
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short Circuit
Output Voltage	0-100% of supply voltage