Danfoss VLT AutomationDrive FC 361 User Manual

Symptom Possible cause Test Solution
Open power
fuses
Phase-to-phase short. Motor or panel has a short phase-to-phase.
Check motor and panel phases for shorts.
Eliminate any shorts detected.
Motor overload. Motor is overloaded for the application. Perform start-up test and verify that
motor current is within specications. If
motor current is exceeding the nameplate
full load current, the motor can run only
with reduced load. Review the speci-
cations for the application.
Loose connections. Perform pre-start-up check for loose
connections.
Tighten loose connections.
Mains current
imbalance
greater than
3%
Problem with mains power (see
alarm 4, Mains phase loss
description).
Rotate input power leads into the 1 position:
A to B, B to C, C to A.
If imbalanced leg follows the wire, it is a
power problem. Check the mains supply.
Problem with the AC drive. Rotate input power leads into the AC drive 1
position: A to B, B to C, C to A.
If the imbalanced leg stays on same input
terminal, it is a problem with the AC
drive. Contact supplier.
Motor current
imbalance
greater than
3%
Problem with motor or motor
wiring.
Rotate output motor cables 1 position: U to V,
V to W, W to U.
If the imbalanced leg follows the wire, the
problem is in the motor or motor wiring.
Check motor and motor wiring.
Problem with AC drive. Rotate output motor cables 1 position: U to V,
V to W, W to U.
If the imbalanced leg stays on same
output terminal, it is a problem with the
unit. Contact supplier.
AC drive
acceleration
problems
Motor data are entered
incorrectly.
If warnings or alarms occur, see
chapter 9.5 List of Warnings and Alarms.
Check that motor data are entered correctly.
Increase the ramp-up time in
parameter 3-41 Ramp 1 Ramp Up Time.
Increase current limit in
parameter 4-18 Current Limit. Increase
torque limit in parameter 4-16 Torque Limit
Motor Mode.
AC drive
deceleration
problems
Motor data are entered
incorrectly.
If warnings or alarms occur, see
chapter 9.5 List of Warnings and Alarms.
Check that motor data are entered correctly.
Increase the ramp-down time in
parameter 3-42 Ramp 1 Ramp Down Time.
Enable overvoltage control in
parameter 2-17 Over-voltage Control.
Table 9.5 Troubleshooting
Maintenance, Diagnostics, a... VLT® AutomationDrive FC 361
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Danfoss VLT AutomationDrive FC 361 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 361
Category	DC Drives
Language	English