Delta VFD-007B, Начало работы

Страница: 27 / 31

English- 27
Fault Codes
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.
Overheating
Heat sink
temperature too
high
1. Ensure that the ambient temperature falls within the
specified temperature range.
2. Make sure that the ventilation holes are not obstructed.
3. Remove any foreign objects from the heatsinks and check
for possible dirty heat sink fins.
4. Check the fan and clean it.
5. Provide enough spacing for adequate ventilation.
Low voltage
The AC motor
drive detects that
the DC bus voltage
has fallen below its
minimum value.
1. Check whether the input voltage falls within the AC motor
drive rated input voltage range.
2. Check whether the motor has sudden load.
3. Check for correct wiring of input power to R-S-T (for 3-phase
models) without phase loss.
Overload
The AC motor
drive detects
excessive drive
output current.
1. Check whether the motor is overloaded.
2. Reduce torque compensation setting in Pr.7-02.
3. Take the next higher power AC motor drive model.
NOTE: The AC motor drive can withstand up to 150% of the
rated current for a maximum of 60 seconds.
Overload 1
Internal electronic
overload trip
1. Check for possible motor overload.
2. Check electronic thermal overload setting.
3. Use a higher power motor.
4. Reduce the current level so that the drive output current
does not exceed the value set by the Motor Rated Current
Pr.7-00.