Delta VFD220VL43C-J - 5-2-3 Over Voltage (ov); Low Voltage (Lv)

Chapter 5 Methods of Anomaly Diagnosis |V FD-VJ-
5-20
5-2-3 Over Voltage (ov)
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OV: Over voltage
Yes
No
Yes
No
Lower voltage of power
supply within the upper
limit
Check if voltage of
power supply is within
the regulated range
It's likely hybrid servo
controller breaks down or
malfunctions due to noise.
Please contact Delta for
assistance.
If the voltage of DC BUS
exceeds the protection value in
action
Adjust the brake level
and make sure it is higher
than the local voltage
Consider implementing
brake unit
5-2-4 Low Voltage (Lv)
Low voltage
Lv
No
Yes
Yes
No
No
No
Yes
No
Yes
No
Yes
If there is power outage (including
momentary blackout)
Reset and
restart
Any broken devices or
bad connection in the
supply circuit
Replace broken components
and correct connection
Modify power supply system to
comply with the regulations
Any load in the same power
supply system that has larger
load of starting current
If Lv occurs when the circuit
breaker and electromagnetic
contactor are ON
If the capacity of power supply
transformer is appropriate
It's likely hybrid servo controller breaks
down or malfunctions due to noise.
Please contact Delta for assistance.
If voltage of power supply
is within regulated range