Hitachi SJ200 Drive

Hitachi SJ200 Drive Fault Codes:

Fault Code and MeaningCause and Remedy
E01
Over-current event while at constant speed
Cause:
The inverter output was short-circuited, or the motor shaft is locked or has a heavy load. These conditions cause excessive current for the inverter, so the inverter output is turned OFF.

The dual-voltage motor is wired incorrectly.



Remedy:

  • Press the Stop/Reset key to clear the fault.

  • Check for short circuits at the output.

  • Check if the motor shaft is locked or the load is too heavy.

  • Verify dual-voltage motor wiring.
E02
Over-current event during deceleration
Cause:
The inverter output was short-circuited, or the motor shaft is locked or has a heavy load. The dual-voltage motor is wired incorrectly.



Remedy:

  • Press the Stop/Reset key to clear the fault.

  • Check for short circuits or mechanical locking.

  • Increase deceleration time if the load inertia is high.
E03
Over-current event during acceleration
Cause:
The inverter output was short-circuited, or the motor shaft is locked or has a heavy load. The dual-voltage motor is wired incorrectly.



Remedy:

  • Press the Stop/Reset key to clear the fault.

  • Check for short circuits or mechanical locking.

  • Increase acceleration time.
E04
Over-current event during other conditions
Cause:
The inverter output was short-circuited, or the motor shaft is locked or has a heavy load. The dual-voltage motor is wired incorrectly.



Remedy:

  • Press the Stop/Reset key to clear the fault.

  • Check wiring and mechanical load conditions.
E05
Overload protection
Cause:
When a motor overload is detected by the electronic thermal function, the inverter trips and turns OFF its output.



Remedy:

  • Reduce the motor load.

  • Check electronic thermal setting.

  • Press Stop/Reset key.
E06
Braking resistor overload
Cause:
When the regenerative braking resistor exceeds the usage time allowance or usage ratio, the inverter trips and turns OFF its output to the motor.



Remedy:

  • Check braking resistor sizing and duty cycle.

  • Press Stop/Reset key.
E07
Over-voltage protection
Cause:
When the DC bus voltage exceeds a threshold, due to regenerative energy from the motor.



Remedy:

  • Increase deceleration time.

  • Check if a braking resistor is required.

  • Press Stop/Reset key.
E08
EEPROM error
Cause:
When the built-in EEPROM memory has problems due to noise or excessive temperature, the inverter trips and turns OFF its output to the motor.



Remedy:

  • Important: Confirm the parameter data values are still correct.

  • Ensure [RS] (Reset) input is not ON when power is restored/cycled.

  • Check for electrical noise interference.

  • Check ambient temperature.
E09
Under-voltage error
Cause:
A decrease of internal DC bus voltage below a threshold results in a control circuit fault. This condition can also generate excessive motor heat or cause low torque.



Remedy:

  • Check input power supply voltage.

  • Check power lines for loose connections.

  • Press Stop/Reset key.
E11, E22
CPU error
Cause:
A malfunction in the built-in CPU has occurred, so the inverter trips and turns OFF its output to the motor.



Remedy:

  • Cycle power to the inverter.

  • If fault persists, contact service/maintenance.
E12
External trip
Cause:
A signal on an intelligent input terminal configured as EXT has occurred. The inverter trips and turns OFF the output to the motor.



Remedy:

  • Investigate the external device triggering the EXT signal.

  • Clear the external fault condition.

  • Press Stop/Reset key.
E13
USP (Unattended Start Protection)
Cause:
When the Unattended Start Protection (USP) is enabled, an error occurred when power is applied while a Run signal is present.



Remedy:

  • Remove the Run signal (turn switch OFF).

  • Reset the fault (Press Stop/Reset).

  • Ensure Run signal is OFF before powering up.
E14
Ground fault
Cause:
The inverter is protected by the detection of ground faults between the inverter output and the motor during powerup tests.



Remedy:

  • Check motor and cabling for ground faults.

  • Check insulation resistance.
E15
Input over-voltage
Cause:
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.



Remedy:

  • Check input power supply for voltage spikes or high levels.

  • Once the fault condition is cleared, the inverter can enter Run Mode again.
E21
Inverter thermal trip
Cause:
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.



Remedy:

  • Check cooling fan operation (if equipped).

  • Clean heat sink and vents.

  • Check ambient temperature.
E23
Gate array error
Cause:
An internal inverter error has occurred in communications between the CPU and gate array IC.



Remedy:

  • Cycle power to the inverter.

  • Check for excessive electrical noise.

  • If fault persists, replace unit.
E35
Thermistor
Cause:
When a thermistor is connected to terminals [6] and [L] and the inverter has sensed the temperature is too high, the inverter trips and turns OFF the output.



Remedy:

  • Check motor temperature.

  • Check thermistor wiring and resistance.

  • Allow motor to cool down.
E60
Communications error
Cause:
The inverter’s watchdog timer for the communications network has timed out.



Remedy:

  • Check communication cables and connections.

  • Check network master status.

  • Press Stop/Reset key.
– – –
Under-voltage (brown-out) with output shutoff
Cause:
Due to low input voltage, the inverter turns its output OFF and tries to restart. If it fails to restart, then the alarm trips to record the under-voltage error event.



Remedy:

  • Check input power stability and voltage levels.

  • Press Stop/Reset key to clear alarm.