Hitachi SJ Series, User Manual

Page: 600 / 786

18-7
Chapter 18
Tips/FAQ/Troubleshooting
E001 Overcurrent error
A large current flowing in the inverter results in a
failure. To prevent this, the inverter turns OFF its
output. By setting the parameter, you can perform
retries for a fixed number of times without generating
an error. Overcurrent level can be set in the [bb160].
Error occurred
during
acceleration.
• Setting longer acceleration time in [FA-10] can ease the insufficient
acceleration torque.
• When acceleration torque is required, the situation may be
improved by adjusting the boost function in [Hb141], or by
operating the inverter and making adjustments with control method
in [AA121].
• Re-examination of load condition may improve the situation.
• Insufficient acceleration
time
• Insufficient acceleration
torque
• Load inertia is large.
• Friction torque is large.
Error occurred
during
deceleration.
• Insufficient deceleration
time
• Insufficient regenerative
torque
• Load inertia is large.
• Setting longer deceleration time in [FA-12] can ease the insufficient
regenerative torque.
• When regenerative torque is required, the situation may be
improved by adjusting the boost function in [Hb141], or by
operating the inverter and making adjustments with control method
in [AA121].
• Re-examination of load condition may improve the situation.
Error occurred right
after power was
turned ON.
• Output element failure
• Current detector failure
• Failure output element or current detector may be the cause.
An investigation and repair are required.
E001
Error occurred
right after an
operation
command input.
• A ground fault has
occurred.
• Output line is
short-circuited or in
open phase.
• Output element failure
• The inverter may be broken if the error persists even when the
power of inverter only is turned ON again after the power was
turned OFF and the output line to the motor was removed.
• If the issue is solved when the output line to the motor is removed,
you need to check the wiring and/or motor.
• Motor is locked.
• Load inertia is large.
• Error may occur when the motor rotation is locked.
• The situation may be improved by taking a measure for the case
“Error occurred during acceleration”.
Occurrence

Estimated cause(s)

Exemplar measures to be taken
Error occurred
abruptly during
operation.
• A steep load change
occurred.
• [bA120] Overcurrent suppression function and [bA122] Overload
limit function are effective to suppress overcurrent.
• When the vector control is used, the situation may be improved by
adjusting the response to control in [HA115].
• Hunting of motor
• The situation may be improved by setting the IM motor capacity in
[Hb102], the number of IM poles in [Hb103], or the auto-tuning
selection in [HA-01].
• The situation may be improved by adjusting stabilization control
gain in [HA110].
Error occurred
after long hours of
use.
• The situation may be improved by reducing the motor load, or
performing a system maintenance (e.g., cleaning the fan to be
driven and removing clogging in the duct).
• System environment
changes
• Aging deterioration
• If the issue is not solved by reduction of the load and system
maintenance, aging deterioration of a life-limited component may be
the cause. A repair is required.