Danfoss VLT AutomationDrive FC 300 Series Design Guide

FC 300 Design Guide
Troubleshooting
Turn off the adjustable frequency drive and
remove the g round fault.
ALARM 16
Short-circuit:
There is short circuiting 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 active 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 until it trips, while giving an alarm .
par. 8-03 Control word Timeout Time could
possibly be incr eased.
WARNING 25
Brake resistor short circuited:
The brake resistor is monitored during op eration. If
it short circuits, the brake function is disconnected
and the warning appears. The adjustable frequency
drive still works, but without the brake function.
Turn off the adjustable frequency drive and replace
the brake resistor (see par. 2-15 Brake Check).
ALARM/WARNING 26
Brake resistor power limit:
The po we r transmitted to the brake resistor is
calculated as a percentage, as a mean value over
the last 120 s, on the basis of the re sistanc e value of
the brake resistor (par. 2-11) and the intermediate
circuit voltage. The warning is active when the
dissipated braking energy is higher than 90%. If Tr
ip
[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 tha
n100%.
WARNING 27
Brake c hopper fault:
The brake transistor is monitored during operation
and if it short circuits, the brake function
disconnects
and the warning comes up. The adjustable frequency
drive is still able to r un, but since the brake transistor
has short circuited, substantial pow
er 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 c ircuited.
ALARM/WARNING 28
Brake chec k failed:
Brake resistor fault: the brake resistor is
not connected/working.
ALARM 29
Drive over temperature:
If the enclosure is IP 20 or IP 21/TYPE 1 (NEMA
1), the cut-out temperature of the heat sink is
203 °F ±9 °F (95 °C ±5 °C). The temperature
fault cannot be reset until the temperature of
the heat sink is below 158 °F (70 °C).
The fault could be:
- Ambient temperature too high
- Too long motor cable
ALARM 30
Motor phase U missing:
Motor p hase U between the adjustable frequency
drive and the motor is missing.
Turn off the adjustable frequency drive and
check motor phase U.
ALARM 31
Motor phase V missing:
Motor phase V between the adjustable frequency
drive and the motor is missing.
Turn off the adjustable frequency drive and
check motor phase V.
ALARM 32
Motor phase W missing:
Motor phase W between the adjustable frequency
drive and the motor is missing.
Turn off the adjustable frequency drive and
check motor phase W.
ALARM 33
Inrush fault:
Too m any p ower-ups have occurr ed within a
short time period. See the chapter General
Specifications for the allowed number of
power-ups w ithin one minute.
267
MG.33.B3.22 - VLT is a registered Danfoss trademark

Danfoss VLT AutomationDrive FC 300 Series Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300 Series
Category	DC Drives
Language	English