CARLO GAVAZZI VariFlex3 RVFFA3400400F, Быстрый старт

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Motor Controllers AC Variable Frequency Drives
Type Variflex 3 RVFF
Specifications are subjected to change without notice.
68
LED display Description Cause Possible solutions
OV
Over voltage
DC bus voltage exceeds the
OV detection level: 820Vdc.
If input voltage 01-14 is set
lower than 400V, the OV
detection
value will is
decreased to 730Vdc.
•
Deceleration time set too short,
resulting in regenerative energy
flowing back from motor to the
inverter.
•
The inverter input voltage is too
high.
•
Use of power factor correction
capacitors.
•
Excessive braking load.
•
Braking transistor or resistor
defective.
•
Speed search parameters set
incorrectly.
•
Increase deceleration time
•
Reduce input voltage to
comply with the input voltage
requirements or install an AC
line reactor to lower the input
voltage.
•
Remove the power factor
correction capacitor.
•
Use dynamic braking unit.
•
Replace braking transistor or
resistor.
•
Adjust speed search
parameters.
UV
Under voltage
DC bus voltage is lower
than the UV detection level
(380Vdc) or the pre-charge
contactor is not active
while the inverter is
running.
(The detection value can be
adjusted by 07-13).
•
The input voltage is too low.
•
Input phase loss.
•
Input voltage fluctuation.
•
Pre-charge contactor damaged.
•
DC bus voltage feedback signal
value not incorrect.
•
Check the input voltage.
•
Check input wiring.
•
Check power source
•
Replace pre-charge contactor
•
Replace control board or
complete inverter.
IPL
input phase
loss
Phase loss at the input
side of the inverter or input
voltage imbalance, active
when 08-09 = 1 (enabled).
•
IPL occurs.
•
Terminal screws of R/L1, S/L2 or
T/L3 are loose or lost.
•
Input voltage fluctuation is too big.
•
Input Voltage is imbalance per
phase
•
Aging of the capacity on main circuit
inside inverter
•
Check if the main wiring
connection is correct.
•
Check if the terminal screw
gets loose.
•
Make sure having stable
input voltage or turn off IPL
detection function.
•
Replace the circuit board or
inverter
OPL
output phase
loss
Phase loss at the output
side of the inverter, active
when 08-10 = 1 (enabled).
•
Wiring loose in inverter output
terminal.
•
Motor rated current is less than 10%
of the inverter rated current.
•
Check output wiring / faster
screws.
•
Check motor & inverter
rating.
OH1
Heatsink
overheat
The temperature of the heat
sink is too high.
Note:
when OH1 fault
occurs three times within
five minutes, it is required to
wait 10 minutes before
resetting the fault.
•
Ambient temperature too high.
•
cooling fan failed
•
Carrier frequency set too high.
•
Load too heavy.
•
Install fan or AC to cool
surroundings.
•
Replace cooling fan.
•
Reduce carrier frequency.
•
Reduce load / Measure output
current
OH4
Motor
overheating
Motor overheating :
The input of PTC (Positive
Temperature Coefficient )
exceeds the overheat
protection level
•
The surrounding temperature of
motor is too high.
•
The input of PTC ( Positive
Temperature Coefficient ) exceeds
the overheat protection level.
•
Check the surrounding
temperature of motor.
•
Check MT and GND terminal
wiring be correct.