HD2 IP55 High-ingress Protection Series
Troubleshooting
-247-
7.6.3 Overvoltage
7.6.4 Undervoltage
Whether the voltage of the power
supply is within the standard range?
Yes
No
Whether UVW on the output
side of the inverter is short
to ground?
Whether the wiring on the
output side of the inverter is
performed properly?
Yes
Yes
Whether the ACC/DEC
time is too short?
Yes
No
Whether the DEC time can Yes
be prolonged?
No
Yes
Whether the loaded motor
is drived reversely?
No
Whether to use a
brake accessory?
No
Yes
Overvoltage fault
If it is a inverter fault,
contact our company
Adjust the brake
accessories and
resistance
Add brake accessories
Check the load and adjust
Prolong the DEC time
Rectify the short-circuit
fault and perform the
wiring properly
Ensure the power supply
meets the requirement
Whether the voltage of the
power supply is within the
standard range?
Yes
No
Whether the air switch and
contactor are opened or
encounter exceptions?
No
Yes
Whether a large-power device
is running on the grid that pulls
down the voltage of the grid?
Yes
No
Whether the
inverter is powered
off during running?
Yes
No
Ensure the power supply
meet the requirement
Undervoltage fault
If it is a inverter fault,
contact our
company
Identify the power-off
causes, and rectify the
exceptions
Adjust the input of the
grid
Close the air switch and
contactor; and rectify the
exceptions
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