Hitachi SJ Series, User Manual

Page: 608 / 786

18-15
Chapter 18
Tips/FAQ/Troubleshooting
E014 Ground fault error
This is a function to protect the inverter by the
detection of ground faults between the inverter output
and the motor at power-on.
The function doesn’t work when there is a voltage
induced in the motor due to idling or when the inverter
trips.
When the control circuit power (R0, T0, or 24V power
supply) has been turned ON prior to the main circuit
power R, S, or T, the function is activated at the time
the main circuit power is turned ON.
E015 Incoming overvoltage
error
This error occurs if high incoming voltage level is held
for 100 seconds continuously while the inverter output
is stopped when incoming overvoltage level [bb-61] is
set to 01. It occurs when the P-N voltage exceeds the
voltage level set in the incoming overvoltage level
selection [bb-62] due to incoming voltage.
Setting the ground fault detection selection [bb-64] to
00 disables the ground fault function. Setting it to 01
enables the function.
Error occurred after
power was turned
ON.
• Incoming voltage is high. • Re-examination of the power supply environment is required.
• Power supply has
become unstable.
• The power supply environment may have been changed due to
facility replacement or the like.
Re-examination of the power supply environment is required.
Error occurred after
long hours of use.
Occurrence

Estimated cause(s)

Exemplar measures to be taken
Error occurred as
the power supply
was turned ON.
• Ground faults of wires
or the motor
• Motor insulation
deterioration
• Turn OFF the power, remove the wires connected to the motor, and
then check the motor and the wires. A ground fault may have been
occurred.
• Turning ON the power supply in a ground fault state results in a
failure. Do not turn ON the power when you check the motor and
motor wires.
E014
Occurrence

Estimated cause(s)

Exemplar measures to be taken
E015