Overvoltage; Undervoltage - Kruger Ecowatt K320 Series Operation Manual

Ecowatt Drive K320 series
®

7.6.3 Overvoltage

Check and adjust the load

7.6.4 Undervoltage

Overvoltage fault
Whether the voltage of the
power supply is within the
standard range?
Yes
Whether UVW on the output
side of the VFD is short to
ground?
Whether the wiring on the
output side of the VFD is
performed properly?
Yes
Whether the ACC/DEC
time is too short?
No
Yes
Whether the loaded motor
is drived reversely?
No
If it is a VFD fault, contact
us
Undervoltage fault
Whether the voltage of the
power supply is within the
standard range?
No
Whether the air switch and
contactor are opened or
encounter exceptions?
No
Whether a large-power device
is running on the grid that pulls
down the voltage of the grid?
No
Whether the VFD is
powered off during
running?
No
If it is a VFD fault, contact
us
No
Ensure the power supply
meets the requirement
Yes Rectify the short-circuit
fault and perform the
wiring properly
Yes
Whether the ACC/DEC
time can be prolonged?
No
Whether to use a
braking
accessory?
No
Adjust the braking
accessories and
resistance
Yes
Ensure the power supply
meet the requirement
Close the air switch and
Yes
contactor; and rectify the
exceptions
Yes
Adjust the input of the
Identify the power-off
Yes
causes, and rectify the
exceptions
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Troubleshooting
Yes
Prolong the ACC/DEC
Yes
Add braking accessories
grid
time