Over-Load; No Display; Motor Heat; Motor Does Not Rotate - Veichi AC300 Series Technical Manual

AC300 Series Vector Control Inverter Manual

Over-load

Motor overload OL1
no
Whether electric thermal relay overload
Change externa
characteristic matches the motor overload
lthermal relay
characteristic
yes
no
Whether electric thermal relay overload
Correct setting value
relay setting E-50 is suiable
yes
yes
Reduce load or
improve capacity
no
Restart after motor stop or
yes
change start mode E-30
to 1/2
no
yes
Prolong ACC/DCC time
no
no
Change torque improving
Whether torque improving or V/F curve setting is suitable
or V/F curve setting
yes
Maybe inverter fault or misact.Please seek for technic support

No display

Inverter keyboard
LED no display
yes
Whether power indicater
Whether keyboard
linght on power board is
connect line is reliable
on or not
yes no
Whether power input
connect
terminals R/S/T is normal
yes
Whether there is short connect
or DC reactor between terminals
P1 and P+l
yes
Maybe inverter fault or motor heat
caused by noise.Please find technic support
Fault Diagnoses and Processing
Inverter overload OL2
Whether load too high
no
Whether the motor stops while restart
no
Whether ACC/DCC time is too short
no
yes
no
Whether circuit breaker
at power side is connect to
contacter
yes
no
connect
no
Find our the fault cause
and clear the fault
no
Short connect or
connect DC reactor
42
AC300 Series Vector Control Inverter Manual

Motor heat

motor heat
no
Adjust torque imporoving
Whether torque improving and V/
value and V/F characteristic
F characteristic are suitable or not
yes
Reduce load or
Whether load is too large
improve capacity
Whether output terminals U/V/W output
voltage /current three phase balance well
Maybe inverter fault or motor heat caused by
noise.Please find technic support

Motor does not rotate

Motor does
not work
yes
Whether keyboard
Work after solving
displays fault information
fault and reset
no
It works after checking
Have input frequency
the cause and solving
signal or not
the problem
yes
Whether upper frequency limit E-10 or given frequency
is lower than the start frequency E-28 setting
yes
Is there voltage output on output terminal U/V/W
and three phase balance ok or not?
yes
yes
Whether load Whether wiring is
is too large correct or not
yes
no
Motor fault Whether torque improving
value is suitable
yes
Maybe motor is locked because of too large load.Load
should be reduced.If there is braking or brake uni,
please check whether it is loose
Fault Diagnoses and Processing
yes
Whether motor continuously
run at low speed
no
yes
Use special motor for inverter
no
yes
Maybe motor fault
no
no
Have input command
signal or not
yes
no
It works after checking the
cause and slving the problem
It works after correct the
yes
upper frequency or given
frequency
no
Maybe inverter fault .Please
find technic support
no
Correct connect
no
Improve torque
improving value
43