Over-Voltage Diagnoses Process; Low-Voltage Supply; Inner Inverter Over-Heat - Veichi AC300 Series Technical Manual

AC300 Series Vector Control Inverter Manual

Over-voltage diagnoses process

ACC over
DCC over
voltage(OU1) voltage(OU2)
no
Reduce power voltage
Fower votage in fixed range or not
into fixed range
yes yes
yes
Clear short circuit
Phase or earth short cirsuit bwteen U/V/W and motor
no no
yes
Stop motor and restart. Whether it stops while restart the motor
Or DC braking,then start
(E-30:1). Or speed track
no
no
start(E-30:2)
Whether act while load suddently changes to"0"
no
no
no
Whether DC circuit voltage of main loop is above protection value while act
Maybe inverter fault or
misact.Plese seek for
yes
yes
no
technic support
Whether act while
Can prolong DCC time or not
suddently stop ACC
yes
no
ACC time can be
prolong or not
no
yes
Load intertia can be reduced or not
Reduce
no no
Whether used braking unit or DC braking function
yes
yes
Please check braking unit and seek for technic support
Fault Diagnoses and Processing
Stop state over
Constant speed
voltage(OU4)
over voltage(OU3)
yes
no
no
no
yes
yes
yes
no
yes
prolong
no
Use braking unit or DC
braking function
yes
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AC300 Series Vector Control Inverter Manual

Low-voltage supply

Voltage is too low
while stop Lu1
yes
Restart after reset
no
yes
Change fault component
Is there any fault component or bad contact in power circuit
and correct bad contact
no
Modify power supply
Whether power voltage is in fixed range as required
system as required
yes
Is there any big load start or stop under the same power supply
no
no
Adjust E-55 setting
Maybe inverter fault.please seek for technic support

Inner inverter over-heat

no
Change fan
Maybe temperature ditection
no
circuit fault.please seek for
technic support
yes
Reduce load and
carried frequency
yes
Clear the air-logged channel
no
Adjust the temperature to
the fixed range as required Whether the temperature is within the fixed range as required
Maybe machine fault or misact.seek for technic support
Fault Diagnoses and Processing
Voltage is too low
while running Lu2
Whether power off,including instant power off
no
no no
yes
yes
no
votage between DC circuit P+ and N- in
main loop is over E-55 setting or not
yes yes
Inner inverter
overheat OH
Whether cooling fan works normally
yes
Whether temperature display(C-09)is
the same as the actual temperature
yes
Whether load and carried frequency
E-20 setting are too high
no
Whether air cooling channels are air-logged
no
yes
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