Hitachi WJ200-001S Instruction Manual page 311

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