Hitachi WJ200 Series

6−6
12. Sound noise of motor or machine.
Possible Cause(s) Corrective Action
Carrier frequency is low. Set carrier frequency (b083) higher. (This could cause
electric noise and leak current higher.)
Machine frequency and motor frequency
are resonated.
Change output frequency slightly. If resonating in
accel/deceleration, use jump frequency function (A063-68)
to avoid machine frequency.
Over excitation Set base frequency (A003/A203) and AVR voltage
(A082/A282) according to motor rating. If not improved,
reduce V/f gain (A045/A245) slightly or change V/f curve
(A044/A244) as free V/f.
13. Overload trip (E05).
Possible Cause(s) Corrective Action
Improper electronic thermal level Check electronic thermal setting (b012/b013)
14. Over voltage trip (E07).
Possible Cause(s) Corrective Action
Short deceleration time Change deceleration time. (F003/F203/A093/A293)
Overvoltage suppression during
deceleration (b130) is disabled (00).
Enable overvoltage suppression (b130=01/02).
When the inverter trips due to over voltage, despite over voltage suppression is enabled.
Improper overvoltage suppression
propotional gain (b134) or integral time
(135).
Check overvoltage suppression proportional gain (b134)
and integral time (b135).
Overvoltage suppression level (b131) is
high.
Set Overvoltage suppression level (b131) lower. (Lower
limit of parameter b131 must be (input voltage)×√2×
1.1.)
15. Thermistor error trip (E35).
Possible Cause(s) Corrective Action
Thermistor is set to input [5] and DC24V
is supplied.
Check setting of input terminal [5] (C005).
16. Unstable output frequency.
Possible Cause(s) Corrective Action
Improper parameters Set output frequency slightly smaller or bigger value than
power source frequency.
Change motor stabilization constant (H006/H203).
Load variation is excessive. Change motor and inverter to one size bigger.
Power voltage variation is excessive. Check power source.
17. Output torque is not sufficient.
Possible Cause(s) Corrective Action
Improper parameters [Acceleration] Increase torque boost (A042/A242-A043/A243)
Reduce carrier frequency (A083).
Change V/f curve (A044/A244) to SLV.
Change torque boost select (A041/A241) to automatic.
Improper parameters [Deceleration] Increase deceleration time (F003/F203/A093/A293).
Disable AVR function (A081/A281).
Install dynamic braking resistor or regenerative braking
unit.