Delta VFD-BW Series, Руководство пользователя

Страница: 184 / 251

Revision May 2009, BWE0, SW V1.05 6-1
Chapter 6 Fault Code Information
The AC motor drive has a comprehensive fault diagnostic system that includes several different
alarms and fault messages. Once a fault is detected, the corresponding protective functions will be
activated. The following faults are displayed as shown on the AC motor drive digital keypad display.
The four most recent faults can be read from the digital keypad or communication.
NOTE
Wait 5 seconds after a fault has been cleared before performing reset via keypad or input terminal.
6.1 Common Problems and Solutions
Fault
Name
Fault Descriptions Corrective Actions
Over current
Abnormal increase in current.
IGBT protection
(Insulated Gate Bipolar
Transistor)
1. Check if motor power corresponds with the AC
motor drive output power.
2. Check the wiring connections to U, V, W for
possible short circuits.
3. Check the wiring connections between the AC
motor drive and motor for possible short
circuits, also to ground.
4. Check for loose contacts between AC motor
drive and motor.
5. Increase the Acceleration Time.
6. Check
for possible excessive loading
conditions at the motor.
7. If there are still any abnormal conditions when
operating the AC motor drive after a short-
circuit is removed and the other points above
are checked, it should be sent back to
manufacturer.
Over voltage
The DC bus voltage has
exceeded its maximum
allowable value.
1. Check if the input voltage falls within the rated
AC motor drive input voltage range.
2. Check for possible voltage transients.
3. DC-bus over-voltage may also be caused by
motor regeneration. Either increase the Decel.
Time or add an optional brake resistor (and
brake unit).
4. Check whether the required brake power is
within the specified limits.