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Tra Cứu Lỗi Biến Tần Inverter Delta Dòng VFD

24/01/2022
oC The AC drive detects an abnormal
increase in current.
1. Check whether the motors horsepower corresponds to the AC drive output
power.
2. Check the wiring connections between the AC drive and motor for possible
short circuits.
3. Increase the Acceleration time (Pr.10, Pr.12).
4. Check for possible excessive loading conditions at the motor.
5. If there are any abnormal conditions when operating the AC drive after short-circuit being removed, it should be sent back to manufacturer.
oV The AC drive detects that the DC bus voltage has exceeded its
maximum allowable value.
1. Check whether the input voltage falls within the rated AC drive input voltage.
2. Check for possible voltage transients.
3. Bus over-voltage may also be caused by motor regeneration. Either increase
the decel time or add an optional brake resistor.
4. Check whether the required braking power is within the specified limits.
oH The AC drive temperature sensor
detects excessive heat.
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 on the heat sinks and check for possible dirty
heat sink fins.
4. Provide enough spacing for adequate ventilation.
Lv The AC drive detects that the DC bus voltage has fallen below its minimum value. Check whether the input voltage falls within the rated AC drive’s input voltage.
oL The AC drive detects excessive drive output current.
Note: The AC drive can withstand
up to 150% of the rated current for
a maximum of 60 seconds.
1. Check whether the motor is overloaded.
2. Reduce torque compensation setting as set in Pr.54.
3. Increase the AC drive’s output capacity.
oL1 Internal electronic overload trip 1. Check for possible motor overload.
2. Check electronic thermal overload setting.
3. Increase motor capacity.
4. Reduce the current level so that the drive output current does not exceed
the value set by the Motor Rated Current Pr.52.
oL2 Motor overload. Check the
parameter settings (Pr.60 to
Pr.62)
1. Reduce the motor load.
2. Adjust the over-torque detection setting to an appropriate setting.
ocR Over-current during acceleration:
1. Short-circuit at motor output.
2. Torque boost too high.
3. Acceleration time too short.
4. AC drive output capacity is
too small.
1. Check for possible poor insulation at the output line.
2. Decrease the torque boost setting in Pr.54.
3. Increase the acceleration time.
4. Replace with the AC drive with one that has a higher output capacity (next HP
size).
ocd Over-current during deceleration:
1. Short-circuit at motor output.
2. Deceleration time too short.
3. AC drive output capacity is
too small.
1. Check for possible poor insulation at the output line.
2. Increase the deceleration time.
3. Replace with the AC drive with one that has a higher output capacity (next HP
size).
ocn Over-current during steady state
operation:
1. Short-circuit at motor output.
2. Sudden increase in motor loading.
3. AC drive output capacity is too small.
1. Check for possible poor insulation at the
output line.
2. Check for possible motor stall.
3. Replace with the AC drive with one that has a higher output capacity (next HP
size).
cFI Internal memory IC can not be
programmed.
1. Switch off power supply.
2. Check whether the input voltage falls within the rated AC drive input voltage.
3. Switch the AC drive back on.
cF2 Internal memory IC can not be
read.
1. Check the connections between the main control board and the power board.
2. Reset drive to factory defaults
EF The external terminal EF-GND goes from OFF to ON. When external terminal EF-GND is closed, the output will be turned off (under N.O.
E.F.).
cFA Auto accel/decel failure Don’t use the function of auto acceleration/ deceleration.
GFF Ground fault :
The AC drive output is abnormal.
When the output terminal is
grounded (short circuit current is
50% more than the AC drive rated
current), the AC drive power
module may be damaged. The
short circuit protection is provided
for AC drive protection, not user
protection.
Ground fault :
1. Check whether the IGBT power module is damaged.
2. Check for possible poor insulation at the output line.
cFI Communication Error
Please refer to Pr.92.
1. Check the connection between the AC drive and computer for loose wires.
2. Check if the communication protocol is properly set.
bb External Base Block.
AC drive output is turned off
1. When the external input terminal (baseblock) is active, the AC drive output will
be turned off.
2. Disable this connection and the AC drive will begin to work again.
HPF OC hardware error Return to the factory.
HPF. CC (current clamp)
HP.F OV hardware error
HP.F. GFF hardware error
cF3 OV or LV
cF3. Current sensor error
cF.3 U-phase error Return to the factory.
c.F3 W-phase error
PHL Phase Loss Check input phase wiring for loose contacts.
code Software protection failure Return to the factory.
FbE PID feedback signal error 1. Check parameter settings (Pr.116) and AVI/ACI wiring.
2. Check for possible fault between system response time and the PID
feedback signal detection time (Pr.123)

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