39
3.5. General Troubleshooting Method
ABNORMALITY CHECK POINT COUNTERMEASURE
Is power source voltage delivered into L1,
L2 terminal (is the charging indicator
illuminated)?
l Check if the power source switched on.
l Turn power source OFF and then ON
again.
l Reconfirm the power voltage level.
l Check to see if the mounting screw
secured.
Is there voltage output from output
terminal T1, T2 and T3?
l Turn power source OFF and then ON
again.
If the loading too heavy to block motor? l Reduce load to start motor.
Is there any abnormal condition of the
inverter?
Motor
inoperative
Is the forward or reverse instruction
loaded?
l Refer to malfunction handling
instructions to examine and correct
wiring.
Is the analog frequency setting loaded?
l Check to see if wiring for analog
frequency input signal is correct?
If the operation mode setting correct?
l Check if the frequency input setting
voltage is correct?
Is wiring on the output terminals T1, T2
and T3 correct?
l Operate by digital?
Motor operate in
opposite direction
Is the wiring for the forward and reverse
signals correct?
l Wiring should be in accordance with the
U, V, W terminals of motor.
Is the wiring for analog frequency input
correct?
l Examining the wiring and correct it.
Is the operation mode setting correct? l Examining the wiring and correct it.
Motor operation
speed fixed
Is the loading too heavy?
l Operation panel operation mode setting
check.
Is the specification of motor (poles,
voltage) correct?
l Reduce loading
Is the gear ratio correct? l Reconfirm motor specification.
Is the highest output frequency setting
correct?
l Reconfirm gear ratio
Motor operation
at speed too
high or too low
Is the voltage on motor side reduced
extremely?
l Reconfirm highest output frequency
Is the loading too heavy? l Reduce loading variation
Is the loading variation too large? l Increase inverter and motor capacity
Abnormal speed
variation at
operation
Is the input power source steady and
stable?
l Install AC reactor on the power supply
input side
To Next Page
Loading...
