Danfoss VLT series Programming Guide

Fault Possible cause Possible solution
Servo drive does
not run or only
starts up slowly or
with diculty.
•
Bearing wear.
•
Incorrect
parameter
settings.
•
Incorrect control
loop parameters.
•
Incorrect torque
settings.
•
Check the
bearings and
shaft.
•
Check the
parameter
settings.
Drive hums and
draws high
current.
Drive defective. Contact Danfoss.
Drive stops
suddenly and
does not restart.
•
No drive
communication.
•
Servo drive in
error mode.
Check the eldbus
connection and the
status indicators
(LEDs) on the servo
drive.
Wrong motor
rotation direction.
Parameter error.
•
Check the
parameter
settings.
•
Change the
rotation direction
if appropriate.
Drive runs
normally, but
does not generate
the expected
torque.
•
Drive defective.
•
Parameter error.
•
Check the
parameter
settings.
•
Contact Danfoss.
Drive screaming.
•
Incorrect
calibration.
•
Faulty current
measurement.
•
Incorrect control
loop parameters.
•
Check the
parameter
settings.
•
Contact Danfoss.
Uneven running. Defective bearing. Check the shaft.
Vibration.
•
Defective bearing.
•
Incorrect control
loop parameters.
•
Check the shaft.
•
Check the
parameter
settings.
(Unusual) running
noises
•
Defective bearing.
•
Defects on
connected
mechanics.
•
Incorrect control
loop parameters.
•
Check the shaft.
•
Check for loose
mechanical
components on
the attached
mechanics.
•
Check the
parameter
settings.
Fault Possible cause Possible solution
System fuse
blows, circuit
breaker trips, or
drive protection
trips immediately.
•
Short circuit.
•
Incorrect control
loop parameters.
•
Check the wiring.
•
Contact Danfoss.
Drive speed drops
sharply under
load.
•
Drive is running at
current limit.
•
Drive is running
with incorrect
parameters.
•
Check the
application.
•
Check the
parameter
settings.
Brake does not
release.
Brake control
defective.
Contact Danfoss.
Holding brake
does not hold the
servo drive.
•
Mechanical brake
defective.
•
Shaft load exceeds
the holding
torque of the
brake.
Contact Danfoss.
Brake
engagement
delayed.
Software error. Contact Danfoss.
Noises when
power-o brake
engaged.
Mechanical brake
damaged.
Contact Danfoss.
LEDs do not light
up.
No power supply. Check the power
supply.
Error 0xFF91
occurs.
Increments between
succeeding values too
big.
Check for velocity or
guide value plausi-
bility distance.
Table 9.1 Troubleshooting Servo Drive
9.2.2 Error Codes
Code Name Severity
(Warning/
Error/Trip
lock)
Description LCP name
0x0000 No error Error No error. –
0x1000 Generic
application
error
Error Generic
application
error.
generic err
0x2310 Overcurrent
on output
Error Overcurrent
on output.
overcurr out
0x239B Overload on
output (I2T)
Warning,
error
I
2
t thermal
state.
overload
0x3210 DC link
overvoltage
Error Overvoltage
on DC-link
voltage
UDC
overvolt
0x3220 DC link
undervoltag
e
Error Undervoltag
e on DC-link
voltage.
UDC
undervolt
Diagnostics
VLT
®
Integrated Servo Drive ISD
®
510 System
368 Danfoss A/S © 01/2017 All rights reserved. MG36D102
99

Danfoss VLT series Specifications

General

Series	VLT
Category	DC Drives
Output Voltage	0-100% of input voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Overtemperature, Short Circuit, Ground Fault
Communication Interfaces	Profibus, CANopen
Enclosure Rating	IP20, IP21, IP55, IP66
Cooling Method	Forced Air Cooling, Convection Cooling
Control Mode	Sensorless Vector, Closed Loop Vector
Ambient Temperature	-10°C to +50°C (14°F to 122°F)