Motor Controllers AC Variable Frequency Drives Type VariFlex
3
RVLF
118 Specications are subject to change without notice. Pictures are just an example. For special features and/or customization, please ask to our sales network. 13/12/2017
Faults which can not be recovered manually and automatically
Display Content Cause Corrective action
oC-A
Over-current at acceleration
1. Acceleration time too short
2. The capacity of the motor
exceeds the capacity of the
inverter
3. Short circuit between the
motor coil and the case
4. Short circuit between
motor wiring and ground
5. IGBT module damaged
1. Set a longer acceleration
time
2. Replace inverter with one
that has the same rating as
that of the motor
3. Check the motor
4. Check the wiring
5. Consult with the supplier
oC-C
Over-current at xed speed
1. Transient load change
2. Transient power change
1. Increase the capacity of
the inverter
2. Install inductor on the
power supply input side
oC-d
Over-current at deceleration
The preset deceleration time is
too short.
Set a longer deceleration
time
oC-S
Over current at start
1. Short circuit between the
motor coil and the case
2. Short circuit between
motor coil and ground
3. IGBT module damaged
1. Inspect the motor
2. Inspect the wiring
3. Consult with the supplier
oV-C
Excessive voltage during
operation/deceleration
1. Deceleration time setting
too short or excessive load
inertia
2. Power voltage varies
widely (uctuates)
1. Set a longer deceleration
time
2. Consider use of a brake
resistor and/or brake
module (in case of 400V
models)
3. Consider use of a reactor
at the power input side
PF
Input phase loss
Abnormal uctuations in the
main circuit voltage
1. Check the main circuit
power supply wiring.
2. Check the power supply
voltage
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