Hitachi WJ200-001L, Instruction Manual

Page: 314 / 680

6

9
Error
Code
Name Cause(s)
 
CPU error A malfunction in the built-in CPU has occurred, so
the inverter trips and turns OFF its output to the
motor.
 
External trip A signal on an intelligent input terminal
configured as EXT has occurred. The inverter trips
and turns OFF the output to the motor.
 
USP When the Unattended Start Protection (USP) is
enabled, an error occurred when power is applied
while a Run signal is present. The inverter trips
and does not go into Run Mode until the error is
cleared.
 
Ground fault The inverter is protected by the detection of ground
faults between the inverter output and the motor
upon during powerup tests. This feature protects
the inverter, and does not protect humans.
 
Input over-voltage The inverter tests for input over-voltage after the
inverter has been in Stop Mode for 100 seconds. If
an over-voltage condition exists, the inverter
enters a fault state. After the fault is cleared, the
inverter can enter Run Mode again.
 
Inverter thermal trip When the inverter internal temperature is above
the threshold, the thermal sensor in the inverter
module detects the excessive temperature of the
power devices and trips, turning the inverter
output OFF.

CPU communication error When communication between two CPU fails,
inverter trips and displays the error code.

Main circuit
error (*3) The inverter will trip if the power supply
establishment is not recognized because of a
malfunction due to noise or damage to the main
circuit element.
 
Driver error An internal inverter error has occurred at the
safety protection circuit between the CPU and
main driver unit. Excessive electrical noise may be
the cause. The inverter has turned OFF the IGBT
module output.
 
Thermistor When a thermistor is connected to terminals [5]
and [L] and the inverter has sensed the
temperature is too high, the inverter trips and
turns OFF the output.

Braking error When "01" has been specified for the Brake Control
Enable (b120), the inverter will trip if it cannot
receive the braking confirmation signal within the
Brake Wait Time for Confirmation (b124) after the
output of the brake release signal.

Safe Stop Safe stop signal is given.

Low-speed overload protection If overload occurs during the motor operation at a
very low speed, the inverter will detect the
overload and shut off the inverter output.